Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1 | #include <linux/ceph/ceph_debug.h> |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2 | |
| 3 | #include <linux/fs.h> |
| 4 | #include <linux/kernel.h> |
| 5 | #include <linux/sched.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 6 | #include <linux/slab.h> |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 7 | #include <linux/vmalloc.h> |
| 8 | #include <linux/wait.h> |
Stephen Rothwell | f1a3d57 | 2010-01-18 11:53:08 +1100 | [diff] [blame] | 9 | #include <linux/writeback.h> |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 10 | |
| 11 | #include "super.h" |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 12 | #include "mds_client.h" |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 13 | #include "cache.h" |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 14 | #include <linux/ceph/decode.h> |
| 15 | #include <linux/ceph/messenger.h> |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 16 | |
| 17 | /* |
| 18 | * Capability management |
| 19 | * |
| 20 | * The Ceph metadata servers control client access to inode metadata |
| 21 | * and file data by issuing capabilities, granting clients permission |
| 22 | * to read and/or write both inode field and file data to OSDs |
| 23 | * (storage nodes). Each capability consists of a set of bits |
| 24 | * indicating which operations are allowed. |
| 25 | * |
| 26 | * If the client holds a *_SHARED cap, the client has a coherent value |
| 27 | * that can be safely read from the cached inode. |
| 28 | * |
| 29 | * In the case of a *_EXCL (exclusive) or FILE_WR capabilities, the |
| 30 | * client is allowed to change inode attributes (e.g., file size, |
| 31 | * mtime), note its dirty state in the ceph_cap, and asynchronously |
| 32 | * flush that metadata change to the MDS. |
| 33 | * |
| 34 | * In the event of a conflicting operation (perhaps by another |
| 35 | * client), the MDS will revoke the conflicting client capabilities. |
| 36 | * |
| 37 | * In order for a client to cache an inode, it must hold a capability |
| 38 | * with at least one MDS server. When inodes are released, release |
| 39 | * notifications are batched and periodically sent en masse to the MDS |
| 40 | * cluster to release server state. |
| 41 | */ |
| 42 | |
| 43 | |
| 44 | /* |
| 45 | * Generate readable cap strings for debugging output. |
| 46 | */ |
| 47 | #define MAX_CAP_STR 20 |
| 48 | static char cap_str[MAX_CAP_STR][40]; |
| 49 | static DEFINE_SPINLOCK(cap_str_lock); |
| 50 | static int last_cap_str; |
| 51 | |
| 52 | static char *gcap_string(char *s, int c) |
| 53 | { |
| 54 | if (c & CEPH_CAP_GSHARED) |
| 55 | *s++ = 's'; |
| 56 | if (c & CEPH_CAP_GEXCL) |
| 57 | *s++ = 'x'; |
| 58 | if (c & CEPH_CAP_GCACHE) |
| 59 | *s++ = 'c'; |
| 60 | if (c & CEPH_CAP_GRD) |
| 61 | *s++ = 'r'; |
| 62 | if (c & CEPH_CAP_GWR) |
| 63 | *s++ = 'w'; |
| 64 | if (c & CEPH_CAP_GBUFFER) |
| 65 | *s++ = 'b'; |
| 66 | if (c & CEPH_CAP_GLAZYIO) |
| 67 | *s++ = 'l'; |
| 68 | return s; |
| 69 | } |
| 70 | |
| 71 | const char *ceph_cap_string(int caps) |
| 72 | { |
| 73 | int i; |
| 74 | char *s; |
| 75 | int c; |
| 76 | |
| 77 | spin_lock(&cap_str_lock); |
| 78 | i = last_cap_str++; |
| 79 | if (last_cap_str == MAX_CAP_STR) |
| 80 | last_cap_str = 0; |
| 81 | spin_unlock(&cap_str_lock); |
| 82 | |
| 83 | s = cap_str[i]; |
| 84 | |
| 85 | if (caps & CEPH_CAP_PIN) |
| 86 | *s++ = 'p'; |
| 87 | |
| 88 | c = (caps >> CEPH_CAP_SAUTH) & 3; |
| 89 | if (c) { |
| 90 | *s++ = 'A'; |
| 91 | s = gcap_string(s, c); |
| 92 | } |
| 93 | |
| 94 | c = (caps >> CEPH_CAP_SLINK) & 3; |
| 95 | if (c) { |
| 96 | *s++ = 'L'; |
| 97 | s = gcap_string(s, c); |
| 98 | } |
| 99 | |
| 100 | c = (caps >> CEPH_CAP_SXATTR) & 3; |
| 101 | if (c) { |
| 102 | *s++ = 'X'; |
| 103 | s = gcap_string(s, c); |
| 104 | } |
| 105 | |
| 106 | c = caps >> CEPH_CAP_SFILE; |
| 107 | if (c) { |
| 108 | *s++ = 'F'; |
| 109 | s = gcap_string(s, c); |
| 110 | } |
| 111 | |
| 112 | if (s == cap_str[i]) |
| 113 | *s++ = '-'; |
| 114 | *s = 0; |
| 115 | return cap_str[i]; |
| 116 | } |
| 117 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 118 | void ceph_caps_init(struct ceph_mds_client *mdsc) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 119 | { |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 120 | INIT_LIST_HEAD(&mdsc->caps_list); |
| 121 | spin_lock_init(&mdsc->caps_list_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 124 | void ceph_caps_finalize(struct ceph_mds_client *mdsc) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 125 | { |
| 126 | struct ceph_cap *cap; |
| 127 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 128 | spin_lock(&mdsc->caps_list_lock); |
| 129 | while (!list_empty(&mdsc->caps_list)) { |
| 130 | cap = list_first_entry(&mdsc->caps_list, |
| 131 | struct ceph_cap, caps_item); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 132 | list_del(&cap->caps_item); |
| 133 | kmem_cache_free(ceph_cap_cachep, cap); |
| 134 | } |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 135 | mdsc->caps_total_count = 0; |
| 136 | mdsc->caps_avail_count = 0; |
| 137 | mdsc->caps_use_count = 0; |
| 138 | mdsc->caps_reserve_count = 0; |
| 139 | mdsc->caps_min_count = 0; |
| 140 | spin_unlock(&mdsc->caps_list_lock); |
Sage Weil | 85ccce4 | 2010-02-17 10:02:43 -0800 | [diff] [blame] | 141 | } |
| 142 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 143 | void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta) |
Sage Weil | 85ccce4 | 2010-02-17 10:02:43 -0800 | [diff] [blame] | 144 | { |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 145 | spin_lock(&mdsc->caps_list_lock); |
| 146 | mdsc->caps_min_count += delta; |
| 147 | BUG_ON(mdsc->caps_min_count < 0); |
| 148 | spin_unlock(&mdsc->caps_list_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 149 | } |
| 150 | |
majianpeng | 93faca6 | 2013-06-26 11:15:27 +0800 | [diff] [blame] | 151 | void ceph_reserve_caps(struct ceph_mds_client *mdsc, |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 152 | struct ceph_cap_reservation *ctx, int need) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 153 | { |
| 154 | int i; |
| 155 | struct ceph_cap *cap; |
| 156 | int have; |
| 157 | int alloc = 0; |
| 158 | LIST_HEAD(newcaps); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 159 | |
| 160 | dout("reserve caps ctx=%p need=%d\n", ctx, need); |
| 161 | |
| 162 | /* first reserve any caps that are already allocated */ |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 163 | spin_lock(&mdsc->caps_list_lock); |
| 164 | if (mdsc->caps_avail_count >= need) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 165 | have = need; |
| 166 | else |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 167 | have = mdsc->caps_avail_count; |
| 168 | mdsc->caps_avail_count -= have; |
| 169 | mdsc->caps_reserve_count += have; |
| 170 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
| 171 | mdsc->caps_reserve_count + |
| 172 | mdsc->caps_avail_count); |
| 173 | spin_unlock(&mdsc->caps_list_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 174 | |
| 175 | for (i = have; i < need; i++) { |
| 176 | cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); |
majianpeng | 93faca6 | 2013-06-26 11:15:27 +0800 | [diff] [blame] | 177 | if (!cap) |
| 178 | break; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 179 | list_add(&cap->caps_item, &newcaps); |
| 180 | alloc++; |
| 181 | } |
majianpeng | 93faca6 | 2013-06-26 11:15:27 +0800 | [diff] [blame] | 182 | /* we didn't manage to reserve as much as we needed */ |
| 183 | if (have + alloc != need) |
| 184 | pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n", |
| 185 | ctx, need, have + alloc); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 186 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 187 | spin_lock(&mdsc->caps_list_lock); |
| 188 | mdsc->caps_total_count += alloc; |
| 189 | mdsc->caps_reserve_count += alloc; |
| 190 | list_splice(&newcaps, &mdsc->caps_list); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 191 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 192 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
| 193 | mdsc->caps_reserve_count + |
| 194 | mdsc->caps_avail_count); |
| 195 | spin_unlock(&mdsc->caps_list_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 196 | |
| 197 | ctx->count = need; |
| 198 | dout("reserve caps ctx=%p %d = %d used + %d resv + %d avail\n", |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 199 | ctx, mdsc->caps_total_count, mdsc->caps_use_count, |
| 200 | mdsc->caps_reserve_count, mdsc->caps_avail_count); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 201 | } |
| 202 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 203 | int ceph_unreserve_caps(struct ceph_mds_client *mdsc, |
| 204 | struct ceph_cap_reservation *ctx) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 205 | { |
| 206 | dout("unreserve caps ctx=%p count=%d\n", ctx, ctx->count); |
| 207 | if (ctx->count) { |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 208 | spin_lock(&mdsc->caps_list_lock); |
| 209 | BUG_ON(mdsc->caps_reserve_count < ctx->count); |
| 210 | mdsc->caps_reserve_count -= ctx->count; |
| 211 | mdsc->caps_avail_count += ctx->count; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 212 | ctx->count = 0; |
| 213 | dout("unreserve caps %d = %d used + %d resv + %d avail\n", |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 214 | mdsc->caps_total_count, mdsc->caps_use_count, |
| 215 | mdsc->caps_reserve_count, mdsc->caps_avail_count); |
| 216 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
| 217 | mdsc->caps_reserve_count + |
| 218 | mdsc->caps_avail_count); |
| 219 | spin_unlock(&mdsc->caps_list_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 220 | } |
| 221 | return 0; |
| 222 | } |
| 223 | |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 224 | struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, |
| 225 | struct ceph_cap_reservation *ctx) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 226 | { |
| 227 | struct ceph_cap *cap = NULL; |
| 228 | |
| 229 | /* temporary, until we do something about cap import/export */ |
Sage Weil | 443b376 | 2010-06-29 09:28:39 -0700 | [diff] [blame] | 230 | if (!ctx) { |
| 231 | cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); |
| 232 | if (cap) { |
Yan, Zheng | 4d1d053 | 2012-11-03 10:32:37 +0800 | [diff] [blame] | 233 | spin_lock(&mdsc->caps_list_lock); |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 234 | mdsc->caps_use_count++; |
| 235 | mdsc->caps_total_count++; |
Yan, Zheng | 4d1d053 | 2012-11-03 10:32:37 +0800 | [diff] [blame] | 236 | spin_unlock(&mdsc->caps_list_lock); |
Sage Weil | 443b376 | 2010-06-29 09:28:39 -0700 | [diff] [blame] | 237 | } |
| 238 | return cap; |
| 239 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 240 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 241 | spin_lock(&mdsc->caps_list_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 242 | dout("get_cap ctx=%p (%d) %d = %d used + %d resv + %d avail\n", |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 243 | ctx, ctx->count, mdsc->caps_total_count, mdsc->caps_use_count, |
| 244 | mdsc->caps_reserve_count, mdsc->caps_avail_count); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 245 | BUG_ON(!ctx->count); |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 246 | BUG_ON(ctx->count > mdsc->caps_reserve_count); |
| 247 | BUG_ON(list_empty(&mdsc->caps_list)); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 248 | |
| 249 | ctx->count--; |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 250 | mdsc->caps_reserve_count--; |
| 251 | mdsc->caps_use_count++; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 252 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 253 | cap = list_first_entry(&mdsc->caps_list, struct ceph_cap, caps_item); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 254 | list_del(&cap->caps_item); |
| 255 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 256 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
| 257 | mdsc->caps_reserve_count + mdsc->caps_avail_count); |
| 258 | spin_unlock(&mdsc->caps_list_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 259 | return cap; |
| 260 | } |
| 261 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 262 | void ceph_put_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 263 | { |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 264 | spin_lock(&mdsc->caps_list_lock); |
Sage Weil | 7c1332b | 2010-02-16 11:39:45 -0800 | [diff] [blame] | 265 | dout("put_cap %p %d = %d used + %d resv + %d avail\n", |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 266 | cap, mdsc->caps_total_count, mdsc->caps_use_count, |
| 267 | mdsc->caps_reserve_count, mdsc->caps_avail_count); |
| 268 | mdsc->caps_use_count--; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 269 | /* |
Sage Weil | 85ccce4 | 2010-02-17 10:02:43 -0800 | [diff] [blame] | 270 | * Keep some preallocated caps around (ceph_min_count), to |
| 271 | * avoid lots of free/alloc churn. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 272 | */ |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 273 | if (mdsc->caps_avail_count >= mdsc->caps_reserve_count + |
| 274 | mdsc->caps_min_count) { |
| 275 | mdsc->caps_total_count--; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 276 | kmem_cache_free(ceph_cap_cachep, cap); |
| 277 | } else { |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 278 | mdsc->caps_avail_count++; |
| 279 | list_add(&cap->caps_item, &mdsc->caps_list); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 280 | } |
| 281 | |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 282 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
| 283 | mdsc->caps_reserve_count + mdsc->caps_avail_count); |
| 284 | spin_unlock(&mdsc->caps_list_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 285 | } |
| 286 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 287 | void ceph_reservation_status(struct ceph_fs_client *fsc, |
Sage Weil | 85ccce4 | 2010-02-17 10:02:43 -0800 | [diff] [blame] | 288 | int *total, int *avail, int *used, int *reserved, |
| 289 | int *min) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 290 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 291 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 292 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 293 | if (total) |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 294 | *total = mdsc->caps_total_count; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 295 | if (avail) |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 296 | *avail = mdsc->caps_avail_count; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 297 | if (used) |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 298 | *used = mdsc->caps_use_count; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 299 | if (reserved) |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 300 | *reserved = mdsc->caps_reserve_count; |
Sage Weil | 85ccce4 | 2010-02-17 10:02:43 -0800 | [diff] [blame] | 301 | if (min) |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 302 | *min = mdsc->caps_min_count; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | /* |
| 306 | * Find ceph_cap for given mds, if any. |
| 307 | * |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 308 | * Called with i_ceph_lock held. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 309 | */ |
| 310 | static struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, int mds) |
| 311 | { |
| 312 | struct ceph_cap *cap; |
| 313 | struct rb_node *n = ci->i_caps.rb_node; |
| 314 | |
| 315 | while (n) { |
| 316 | cap = rb_entry(n, struct ceph_cap, ci_node); |
| 317 | if (mds < cap->mds) |
| 318 | n = n->rb_left; |
| 319 | else if (mds > cap->mds) |
| 320 | n = n->rb_right; |
| 321 | else |
| 322 | return cap; |
| 323 | } |
| 324 | return NULL; |
| 325 | } |
| 326 | |
Greg Farnum | 2bc5025 | 2010-06-30 12:44:34 -0700 | [diff] [blame] | 327 | struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, int mds) |
| 328 | { |
| 329 | struct ceph_cap *cap; |
| 330 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 331 | spin_lock(&ci->i_ceph_lock); |
Greg Farnum | 2bc5025 | 2010-06-30 12:44:34 -0700 | [diff] [blame] | 332 | cap = __get_cap_for_mds(ci, mds); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 333 | spin_unlock(&ci->i_ceph_lock); |
Greg Farnum | 2bc5025 | 2010-06-30 12:44:34 -0700 | [diff] [blame] | 334 | return cap; |
| 335 | } |
| 336 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 337 | /* |
Sage Weil | 33caad3 | 2010-05-26 14:31:27 -0700 | [diff] [blame] | 338 | * Return id of any MDS with a cap, preferably FILE_WR|BUFFER|EXCL, else -1. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 339 | */ |
Sage Weil | ca81f3f | 2010-06-10 14:21:36 -0700 | [diff] [blame] | 340 | static int __ceph_get_cap_mds(struct ceph_inode_info *ci) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 341 | { |
| 342 | struct ceph_cap *cap; |
| 343 | int mds = -1; |
| 344 | struct rb_node *p; |
| 345 | |
Sage Weil | 33caad3 | 2010-05-26 14:31:27 -0700 | [diff] [blame] | 346 | /* prefer mds with WR|BUFFER|EXCL caps */ |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 347 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
| 348 | cap = rb_entry(p, struct ceph_cap, ci_node); |
| 349 | mds = cap->mds; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 350 | if (cap->issued & (CEPH_CAP_FILE_WR | |
| 351 | CEPH_CAP_FILE_BUFFER | |
| 352 | CEPH_CAP_FILE_EXCL)) |
| 353 | break; |
| 354 | } |
| 355 | return mds; |
| 356 | } |
| 357 | |
| 358 | int ceph_get_cap_mds(struct inode *inode) |
| 359 | { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 360 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 361 | int mds; |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 362 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | ca81f3f | 2010-06-10 14:21:36 -0700 | [diff] [blame] | 363 | mds = __ceph_get_cap_mds(ceph_inode(inode)); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 364 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 365 | return mds; |
| 366 | } |
| 367 | |
| 368 | /* |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 369 | * Called under i_ceph_lock. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 370 | */ |
| 371 | static void __insert_cap_node(struct ceph_inode_info *ci, |
| 372 | struct ceph_cap *new) |
| 373 | { |
| 374 | struct rb_node **p = &ci->i_caps.rb_node; |
| 375 | struct rb_node *parent = NULL; |
| 376 | struct ceph_cap *cap = NULL; |
| 377 | |
| 378 | while (*p) { |
| 379 | parent = *p; |
| 380 | cap = rb_entry(parent, struct ceph_cap, ci_node); |
| 381 | if (new->mds < cap->mds) |
| 382 | p = &(*p)->rb_left; |
| 383 | else if (new->mds > cap->mds) |
| 384 | p = &(*p)->rb_right; |
| 385 | else |
| 386 | BUG(); |
| 387 | } |
| 388 | |
| 389 | rb_link_node(&new->ci_node, parent, p); |
| 390 | rb_insert_color(&new->ci_node, &ci->i_caps); |
| 391 | } |
| 392 | |
| 393 | /* |
| 394 | * (re)set cap hold timeouts, which control the delayed release |
| 395 | * of unused caps back to the MDS. Should be called on cap use. |
| 396 | */ |
| 397 | static void __cap_set_timeouts(struct ceph_mds_client *mdsc, |
| 398 | struct ceph_inode_info *ci) |
| 399 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 400 | struct ceph_mount_options *ma = mdsc->fsc->mount_options; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 401 | |
| 402 | ci->i_hold_caps_min = round_jiffies(jiffies + |
| 403 | ma->caps_wanted_delay_min * HZ); |
| 404 | ci->i_hold_caps_max = round_jiffies(jiffies + |
| 405 | ma->caps_wanted_delay_max * HZ); |
| 406 | dout("__cap_set_timeouts %p min %lu max %lu\n", &ci->vfs_inode, |
| 407 | ci->i_hold_caps_min - jiffies, ci->i_hold_caps_max - jiffies); |
| 408 | } |
| 409 | |
| 410 | /* |
| 411 | * (Re)queue cap at the end of the delayed cap release list. |
| 412 | * |
| 413 | * If I_FLUSH is set, leave the inode at the front of the list. |
| 414 | * |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 415 | * Caller holds i_ceph_lock |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 416 | * -> we take mdsc->cap_delay_lock |
| 417 | */ |
| 418 | static void __cap_delay_requeue(struct ceph_mds_client *mdsc, |
| 419 | struct ceph_inode_info *ci) |
| 420 | { |
| 421 | __cap_set_timeouts(mdsc, ci); |
| 422 | dout("__cap_delay_requeue %p flags %d at %lu\n", &ci->vfs_inode, |
| 423 | ci->i_ceph_flags, ci->i_hold_caps_max); |
| 424 | if (!mdsc->stopping) { |
| 425 | spin_lock(&mdsc->cap_delay_lock); |
| 426 | if (!list_empty(&ci->i_cap_delay_list)) { |
| 427 | if (ci->i_ceph_flags & CEPH_I_FLUSH) |
| 428 | goto no_change; |
| 429 | list_del_init(&ci->i_cap_delay_list); |
| 430 | } |
| 431 | list_add_tail(&ci->i_cap_delay_list, &mdsc->cap_delay_list); |
| 432 | no_change: |
| 433 | spin_unlock(&mdsc->cap_delay_lock); |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * Queue an inode for immediate writeback. Mark inode with I_FLUSH, |
| 439 | * indicating we should send a cap message to flush dirty metadata |
| 440 | * asap, and move to the front of the delayed cap list. |
| 441 | */ |
| 442 | static void __cap_delay_requeue_front(struct ceph_mds_client *mdsc, |
| 443 | struct ceph_inode_info *ci) |
| 444 | { |
| 445 | dout("__cap_delay_requeue_front %p\n", &ci->vfs_inode); |
| 446 | spin_lock(&mdsc->cap_delay_lock); |
| 447 | ci->i_ceph_flags |= CEPH_I_FLUSH; |
| 448 | if (!list_empty(&ci->i_cap_delay_list)) |
| 449 | list_del_init(&ci->i_cap_delay_list); |
| 450 | list_add(&ci->i_cap_delay_list, &mdsc->cap_delay_list); |
| 451 | spin_unlock(&mdsc->cap_delay_lock); |
| 452 | } |
| 453 | |
| 454 | /* |
| 455 | * Cancel delayed work on cap. |
| 456 | * |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 457 | * Caller must hold i_ceph_lock. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 458 | */ |
| 459 | static void __cap_delay_cancel(struct ceph_mds_client *mdsc, |
| 460 | struct ceph_inode_info *ci) |
| 461 | { |
| 462 | dout("__cap_delay_cancel %p\n", &ci->vfs_inode); |
| 463 | if (list_empty(&ci->i_cap_delay_list)) |
| 464 | return; |
| 465 | spin_lock(&mdsc->cap_delay_lock); |
| 466 | list_del_init(&ci->i_cap_delay_list); |
| 467 | spin_unlock(&mdsc->cap_delay_lock); |
| 468 | } |
| 469 | |
| 470 | /* |
| 471 | * Common issue checks for add_cap, handle_cap_grant. |
| 472 | */ |
| 473 | static void __check_cap_issue(struct ceph_inode_info *ci, struct ceph_cap *cap, |
| 474 | unsigned issued) |
| 475 | { |
| 476 | unsigned had = __ceph_caps_issued(ci, NULL); |
| 477 | |
| 478 | /* |
| 479 | * Each time we receive FILE_CACHE anew, we increment |
| 480 | * i_rdcache_gen. |
| 481 | */ |
Sage Weil | 2962507 | 2010-05-27 10:40:43 -0700 | [diff] [blame] | 482 | if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) && |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 483 | (had & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 484 | ci->i_rdcache_gen++; |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 485 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 486 | |
| 487 | /* |
Yan, Zheng | 2f276c5 | 2013-03-13 19:44:32 +0800 | [diff] [blame] | 488 | * if we are newly issued FILE_SHARED, mark dir not complete; we |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 489 | * don't know what happened to this directory while we didn't |
| 490 | * have the cap. |
| 491 | */ |
| 492 | if ((issued & CEPH_CAP_FILE_SHARED) && |
| 493 | (had & CEPH_CAP_FILE_SHARED) == 0) { |
| 494 | ci->i_shared_gen++; |
Yan, Zheng | a8673d6 | 2013-02-18 16:38:14 +0800 | [diff] [blame] | 495 | if (S_ISDIR(ci->vfs_inode.i_mode)) { |
| 496 | dout(" marking %p NOT complete\n", &ci->vfs_inode); |
Yan, Zheng | 2f276c5 | 2013-03-13 19:44:32 +0800 | [diff] [blame] | 497 | __ceph_dir_clear_complete(ci); |
Yan, Zheng | a8673d6 | 2013-02-18 16:38:14 +0800 | [diff] [blame] | 498 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 499 | } |
| 500 | } |
| 501 | |
| 502 | /* |
| 503 | * Add a capability under the given MDS session. |
| 504 | * |
| 505 | * Caller should hold session snap_rwsem (read) and s_mutex. |
| 506 | * |
| 507 | * @fmode is the open file mode, if we are opening a file, otherwise |
| 508 | * it is < 0. (This is so we can atomically add the cap and add an |
| 509 | * open file reference to it.) |
| 510 | */ |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 511 | void ceph_add_cap(struct inode *inode, |
| 512 | struct ceph_mds_session *session, u64 cap_id, |
| 513 | int fmode, unsigned issued, unsigned wanted, |
| 514 | unsigned seq, unsigned mseq, u64 realmino, int flags, |
| 515 | struct ceph_cap **new_cap) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 516 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 517 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 518 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 519 | struct ceph_cap *cap; |
| 520 | int mds = session->s_mds; |
| 521 | int actual_wanted; |
| 522 | |
| 523 | dout("add_cap %p mds%d cap %llx %s seq %d\n", inode, |
| 524 | session->s_mds, cap_id, ceph_cap_string(issued), seq); |
| 525 | |
| 526 | /* |
| 527 | * If we are opening the file, include file mode wanted bits |
| 528 | * in wanted. |
| 529 | */ |
| 530 | if (fmode >= 0) |
| 531 | wanted |= ceph_caps_for_mode(fmode); |
| 532 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 533 | cap = __get_cap_for_mds(ci, mds); |
| 534 | if (!cap) { |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 535 | cap = *new_cap; |
| 536 | *new_cap = NULL; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 537 | |
| 538 | cap->issued = 0; |
| 539 | cap->implemented = 0; |
| 540 | cap->mds = mds; |
| 541 | cap->mds_wanted = 0; |
Yan, Zheng | 964266c | 2013-02-27 09:26:09 +0800 | [diff] [blame] | 542 | cap->mseq = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 543 | |
| 544 | cap->ci = ci; |
| 545 | __insert_cap_node(ci, cap); |
| 546 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 547 | /* add to session cap list */ |
| 548 | cap->session = session; |
| 549 | spin_lock(&session->s_cap_lock); |
| 550 | list_add_tail(&cap->session_caps, &session->s_caps); |
| 551 | session->s_nr_caps++; |
| 552 | spin_unlock(&session->s_cap_lock); |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 553 | } else { |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 554 | /* |
| 555 | * auth mds of the inode changed. we received the cap export |
| 556 | * message, but still haven't received the cap import message. |
| 557 | * handle_cap_export() updated the new auth MDS' cap. |
| 558 | * |
| 559 | * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing |
| 560 | * a message that was send before the cap import message. So |
| 561 | * don't remove caps. |
| 562 | */ |
| 563 | if (ceph_seq_cmp(seq, cap->seq) <= 0) { |
| 564 | WARN_ON(cap != ci->i_auth_cap); |
| 565 | WARN_ON(cap->cap_id != cap_id); |
| 566 | seq = cap->seq; |
| 567 | mseq = cap->mseq; |
| 568 | issued |= cap->issued; |
| 569 | flags |= CEPH_CAP_FLAG_AUTH; |
| 570 | } |
| 571 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 572 | |
| 573 | if (!ci->i_snap_realm) { |
| 574 | /* |
| 575 | * add this inode to the appropriate snap realm |
| 576 | */ |
| 577 | struct ceph_snap_realm *realm = ceph_lookup_snap_realm(mdsc, |
| 578 | realmino); |
| 579 | if (realm) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 580 | spin_lock(&realm->inodes_with_caps_lock); |
| 581 | ci->i_snap_realm = realm; |
| 582 | list_add(&ci->i_snap_realm_item, |
| 583 | &realm->inodes_with_caps); |
| 584 | spin_unlock(&realm->inodes_with_caps_lock); |
| 585 | } else { |
| 586 | pr_err("ceph_add_cap: couldn't find snap realm %llx\n", |
| 587 | realmino); |
Sage Weil | b8cd07e | 2010-07-16 12:00:02 -0700 | [diff] [blame] | 588 | WARN_ON(!realm); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 589 | } |
| 590 | } |
| 591 | |
| 592 | __check_cap_issue(ci, cap, issued); |
| 593 | |
| 594 | /* |
| 595 | * If we are issued caps we don't want, or the mds' wanted |
| 596 | * value appears to be off, queue a check so we'll release |
| 597 | * later and/or update the mds wanted value. |
| 598 | */ |
| 599 | actual_wanted = __ceph_caps_wanted(ci); |
| 600 | if ((wanted & ~actual_wanted) || |
| 601 | (issued & ~actual_wanted & CEPH_CAP_ANY_WR)) { |
| 602 | dout(" issued %s, mds wanted %s, actual %s, queueing\n", |
| 603 | ceph_cap_string(issued), ceph_cap_string(wanted), |
| 604 | ceph_cap_string(actual_wanted)); |
| 605 | __cap_delay_requeue(mdsc, ci); |
| 606 | } |
| 607 | |
Yan, Zheng | b8c2f3a | 2013-05-31 16:37:11 +0800 | [diff] [blame] | 608 | if (flags & CEPH_CAP_FLAG_AUTH) { |
| 609 | if (ci->i_auth_cap == NULL || |
Yan, Zheng | d9ffc4f | 2014-03-18 10:15:29 +0800 | [diff] [blame] | 610 | ceph_seq_cmp(ci->i_auth_cap->mseq, mseq) < 0) { |
Yan, Zheng | b8c2f3a | 2013-05-31 16:37:11 +0800 | [diff] [blame] | 611 | ci->i_auth_cap = cap; |
Yan, Zheng | d9ffc4f | 2014-03-18 10:15:29 +0800 | [diff] [blame] | 612 | cap->mds_wanted = wanted; |
| 613 | } |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 614 | } else { |
| 615 | WARN_ON(ci->i_auth_cap == cap); |
Yan, Zheng | 8a92a11 | 2013-01-04 14:28:07 +0800 | [diff] [blame] | 616 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 617 | |
| 618 | dout("add_cap inode %p (%llx.%llx) cap %p %s now %s seq %d mds%d\n", |
| 619 | inode, ceph_vinop(inode), cap, ceph_cap_string(issued), |
| 620 | ceph_cap_string(issued|cap->issued), seq, mds); |
| 621 | cap->cap_id = cap_id; |
| 622 | cap->issued = issued; |
| 623 | cap->implemented |= issued; |
Yan, Zheng | d1b8780 | 2013-11-13 14:47:19 +0800 | [diff] [blame] | 624 | if (ceph_seq_cmp(mseq, cap->mseq) > 0) |
Yan, Zheng | 964266c | 2013-02-27 09:26:09 +0800 | [diff] [blame] | 625 | cap->mds_wanted = wanted; |
| 626 | else |
| 627 | cap->mds_wanted |= wanted; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 628 | cap->seq = seq; |
| 629 | cap->issue_seq = seq; |
| 630 | cap->mseq = mseq; |
Sage Weil | 685f9a5d | 2009-11-09 12:05:48 -0800 | [diff] [blame] | 631 | cap->cap_gen = session->s_cap_gen; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 632 | |
| 633 | if (fmode >= 0) |
| 634 | __ceph_get_fmode(ci, fmode); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 635 | } |
| 636 | |
| 637 | /* |
| 638 | * Return true if cap has not timed out and belongs to the current |
| 639 | * generation of the MDS session (i.e. has not gone 'stale' due to |
| 640 | * us losing touch with the mds). |
| 641 | */ |
| 642 | static int __cap_is_valid(struct ceph_cap *cap) |
| 643 | { |
| 644 | unsigned long ttl; |
Sage Weil | cdac830 | 2009-11-10 16:02:23 -0800 | [diff] [blame] | 645 | u32 gen; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 646 | |
Alex Elder | d8fb02a | 2012-01-12 17:48:10 -0800 | [diff] [blame] | 647 | spin_lock(&cap->session->s_gen_ttl_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 648 | gen = cap->session->s_cap_gen; |
| 649 | ttl = cap->session->s_cap_ttl; |
Alex Elder | d8fb02a | 2012-01-12 17:48:10 -0800 | [diff] [blame] | 650 | spin_unlock(&cap->session->s_gen_ttl_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 651 | |
Sage Weil | 685f9a5d | 2009-11-09 12:05:48 -0800 | [diff] [blame] | 652 | if (cap->cap_gen < gen || time_after_eq(jiffies, ttl)) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 653 | dout("__cap_is_valid %p cap %p issued %s " |
| 654 | "but STALE (gen %u vs %u)\n", &cap->ci->vfs_inode, |
Sage Weil | 685f9a5d | 2009-11-09 12:05:48 -0800 | [diff] [blame] | 655 | cap, ceph_cap_string(cap->issued), cap->cap_gen, gen); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | return 1; |
| 660 | } |
| 661 | |
| 662 | /* |
| 663 | * Return set of valid cap bits issued to us. Note that caps time |
| 664 | * out, and may be invalidated in bulk if the client session times out |
| 665 | * and session->s_cap_gen is bumped. |
| 666 | */ |
| 667 | int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented) |
| 668 | { |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 669 | int have = ci->i_snap_caps; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 670 | struct ceph_cap *cap; |
| 671 | struct rb_node *p; |
| 672 | |
| 673 | if (implemented) |
| 674 | *implemented = 0; |
| 675 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
| 676 | cap = rb_entry(p, struct ceph_cap, ci_node); |
| 677 | if (!__cap_is_valid(cap)) |
| 678 | continue; |
| 679 | dout("__ceph_caps_issued %p cap %p issued %s\n", |
| 680 | &ci->vfs_inode, cap, ceph_cap_string(cap->issued)); |
| 681 | have |= cap->issued; |
| 682 | if (implemented) |
| 683 | *implemented |= cap->implemented; |
| 684 | } |
Yan, Zheng | b1530f5 | 2013-07-02 12:40:20 +0800 | [diff] [blame] | 685 | /* |
| 686 | * exclude caps issued by non-auth MDS, but are been revoking |
| 687 | * by the auth MDS. The non-auth MDS should be revoking/exporting |
| 688 | * these caps, but the message is delayed. |
| 689 | */ |
| 690 | if (ci->i_auth_cap) { |
| 691 | cap = ci->i_auth_cap; |
| 692 | have &= ~cap->implemented | cap->issued; |
| 693 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 694 | return have; |
| 695 | } |
| 696 | |
| 697 | /* |
| 698 | * Get cap bits issued by caps other than @ocap |
| 699 | */ |
| 700 | int __ceph_caps_issued_other(struct ceph_inode_info *ci, struct ceph_cap *ocap) |
| 701 | { |
| 702 | int have = ci->i_snap_caps; |
| 703 | struct ceph_cap *cap; |
| 704 | struct rb_node *p; |
| 705 | |
| 706 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
| 707 | cap = rb_entry(p, struct ceph_cap, ci_node); |
| 708 | if (cap == ocap) |
| 709 | continue; |
| 710 | if (!__cap_is_valid(cap)) |
| 711 | continue; |
| 712 | have |= cap->issued; |
| 713 | } |
| 714 | return have; |
| 715 | } |
| 716 | |
| 717 | /* |
| 718 | * Move a cap to the end of the LRU (oldest caps at list head, newest |
| 719 | * at list tail). |
| 720 | */ |
| 721 | static void __touch_cap(struct ceph_cap *cap) |
| 722 | { |
| 723 | struct ceph_mds_session *s = cap->session; |
| 724 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 725 | spin_lock(&s->s_cap_lock); |
Sage Weil | 7c1332b | 2010-02-16 11:39:45 -0800 | [diff] [blame] | 726 | if (s->s_cap_iterator == NULL) { |
Sage Weil | 5dacf09 | 2009-12-21 20:40:34 -0800 | [diff] [blame] | 727 | dout("__touch_cap %p cap %p mds%d\n", &cap->ci->vfs_inode, cap, |
| 728 | s->s_mds); |
| 729 | list_move_tail(&cap->session_caps, &s->s_caps); |
| 730 | } else { |
| 731 | dout("__touch_cap %p cap %p mds%d NOP, iterating over caps\n", |
| 732 | &cap->ci->vfs_inode, cap, s->s_mds); |
| 733 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 734 | spin_unlock(&s->s_cap_lock); |
| 735 | } |
| 736 | |
| 737 | /* |
| 738 | * Check if we hold the given mask. If so, move the cap(s) to the |
| 739 | * front of their respective LRUs. (This is the preferred way for |
| 740 | * callers to check for caps they want.) |
| 741 | */ |
| 742 | int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch) |
| 743 | { |
| 744 | struct ceph_cap *cap; |
| 745 | struct rb_node *p; |
| 746 | int have = ci->i_snap_caps; |
| 747 | |
| 748 | if ((have & mask) == mask) { |
| 749 | dout("__ceph_caps_issued_mask %p snap issued %s" |
| 750 | " (mask %s)\n", &ci->vfs_inode, |
| 751 | ceph_cap_string(have), |
| 752 | ceph_cap_string(mask)); |
| 753 | return 1; |
| 754 | } |
| 755 | |
| 756 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
| 757 | cap = rb_entry(p, struct ceph_cap, ci_node); |
| 758 | if (!__cap_is_valid(cap)) |
| 759 | continue; |
| 760 | if ((cap->issued & mask) == mask) { |
| 761 | dout("__ceph_caps_issued_mask %p cap %p issued %s" |
| 762 | " (mask %s)\n", &ci->vfs_inode, cap, |
| 763 | ceph_cap_string(cap->issued), |
| 764 | ceph_cap_string(mask)); |
| 765 | if (touch) |
| 766 | __touch_cap(cap); |
| 767 | return 1; |
| 768 | } |
| 769 | |
| 770 | /* does a combination of caps satisfy mask? */ |
| 771 | have |= cap->issued; |
| 772 | if ((have & mask) == mask) { |
| 773 | dout("__ceph_caps_issued_mask %p combo issued %s" |
| 774 | " (mask %s)\n", &ci->vfs_inode, |
| 775 | ceph_cap_string(cap->issued), |
| 776 | ceph_cap_string(mask)); |
| 777 | if (touch) { |
| 778 | struct rb_node *q; |
| 779 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 780 | /* touch this + preceding caps */ |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 781 | __touch_cap(cap); |
| 782 | for (q = rb_first(&ci->i_caps); q != p; |
| 783 | q = rb_next(q)) { |
| 784 | cap = rb_entry(q, struct ceph_cap, |
| 785 | ci_node); |
| 786 | if (!__cap_is_valid(cap)) |
| 787 | continue; |
| 788 | __touch_cap(cap); |
| 789 | } |
| 790 | } |
| 791 | return 1; |
| 792 | } |
| 793 | } |
| 794 | |
| 795 | return 0; |
| 796 | } |
| 797 | |
| 798 | /* |
| 799 | * Return true if mask caps are currently being revoked by an MDS. |
| 800 | */ |
Yan, Zheng | 6ee6b953 | 2013-07-02 12:40:21 +0800 | [diff] [blame] | 801 | int __ceph_caps_revoking_other(struct ceph_inode_info *ci, |
| 802 | struct ceph_cap *ocap, int mask) |
| 803 | { |
| 804 | struct ceph_cap *cap; |
| 805 | struct rb_node *p; |
| 806 | |
| 807 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
| 808 | cap = rb_entry(p, struct ceph_cap, ci_node); |
Yan, Zheng | 9563f88 | 2013-11-22 13:50:45 +0800 | [diff] [blame] | 809 | if (cap != ocap && |
Yan, Zheng | 6ee6b953 | 2013-07-02 12:40:21 +0800 | [diff] [blame] | 810 | (cap->implemented & ~cap->issued & mask)) |
| 811 | return 1; |
| 812 | } |
| 813 | return 0; |
| 814 | } |
| 815 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 816 | int ceph_caps_revoking(struct ceph_inode_info *ci, int mask) |
| 817 | { |
| 818 | struct inode *inode = &ci->vfs_inode; |
Yan, Zheng | 6ee6b953 | 2013-07-02 12:40:21 +0800 | [diff] [blame] | 819 | int ret; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 820 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 821 | spin_lock(&ci->i_ceph_lock); |
Yan, Zheng | 6ee6b953 | 2013-07-02 12:40:21 +0800 | [diff] [blame] | 822 | ret = __ceph_caps_revoking_other(ci, NULL, mask); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 823 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 824 | dout("ceph_caps_revoking %p %s = %d\n", inode, |
| 825 | ceph_cap_string(mask), ret); |
| 826 | return ret; |
| 827 | } |
| 828 | |
| 829 | int __ceph_caps_used(struct ceph_inode_info *ci) |
| 830 | { |
| 831 | int used = 0; |
| 832 | if (ci->i_pin_ref) |
| 833 | used |= CEPH_CAP_PIN; |
| 834 | if (ci->i_rd_ref) |
| 835 | used |= CEPH_CAP_FILE_RD; |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 836 | if (ci->i_rdcache_ref || |
| 837 | (!S_ISDIR(ci->vfs_inode.i_mode) && /* ignore readdir cache */ |
| 838 | ci->vfs_inode.i_data.nrpages)) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 839 | used |= CEPH_CAP_FILE_CACHE; |
| 840 | if (ci->i_wr_ref) |
| 841 | used |= CEPH_CAP_FILE_WR; |
Henry C Chang | d3d0720 | 2011-05-11 10:29:54 +0000 | [diff] [blame] | 842 | if (ci->i_wb_ref || ci->i_wrbuffer_ref) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 843 | used |= CEPH_CAP_FILE_BUFFER; |
| 844 | return used; |
| 845 | } |
| 846 | |
| 847 | /* |
| 848 | * wanted, by virtue of open file modes |
| 849 | */ |
| 850 | int __ceph_caps_file_wanted(struct ceph_inode_info *ci) |
| 851 | { |
Yan, Zheng | 774a6a1 | 2016-06-06 16:01:39 +0800 | [diff] [blame] | 852 | int i, bits = 0; |
| 853 | for (i = 0; i < CEPH_FILE_MODE_BITS; i++) { |
| 854 | if (ci->i_nr_by_mode[i]) |
| 855 | bits |= 1 << i; |
| 856 | } |
| 857 | if (bits == 0) |
| 858 | return 0; |
| 859 | return ceph_caps_for_mode(bits >> 1); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 860 | } |
| 861 | |
| 862 | /* |
| 863 | * Return caps we have registered with the MDS(s) as 'wanted'. |
| 864 | */ |
| 865 | int __ceph_caps_mds_wanted(struct ceph_inode_info *ci) |
| 866 | { |
| 867 | struct ceph_cap *cap; |
| 868 | struct rb_node *p; |
| 869 | int mds_wanted = 0; |
| 870 | |
| 871 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
| 872 | cap = rb_entry(p, struct ceph_cap, ci_node); |
| 873 | if (!__cap_is_valid(cap)) |
| 874 | continue; |
Yan, Zheng | a255060 | 2014-03-08 09:51:45 +0800 | [diff] [blame] | 875 | if (cap == ci->i_auth_cap) |
| 876 | mds_wanted |= cap->mds_wanted; |
| 877 | else |
| 878 | mds_wanted |= (cap->mds_wanted & ~CEPH_CAP_ANY_FILE_WR); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 879 | } |
| 880 | return mds_wanted; |
| 881 | } |
| 882 | |
| 883 | /* |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 884 | * called under i_ceph_lock |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 885 | */ |
| 886 | static int __ceph_is_any_caps(struct ceph_inode_info *ci) |
| 887 | { |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 888 | return !RB_EMPTY_ROOT(&ci->i_caps); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 889 | } |
| 890 | |
Yan, Zheng | 9215aee | 2013-11-30 12:47:41 +0800 | [diff] [blame] | 891 | int ceph_is_any_caps(struct inode *inode) |
| 892 | { |
| 893 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 894 | int ret; |
| 895 | |
| 896 | spin_lock(&ci->i_ceph_lock); |
| 897 | ret = __ceph_is_any_caps(ci); |
| 898 | spin_unlock(&ci->i_ceph_lock); |
| 899 | |
| 900 | return ret; |
| 901 | } |
| 902 | |
Yan, Zheng | db40cc1 | 2015-03-23 20:12:20 +0800 | [diff] [blame] | 903 | static void drop_inode_snap_realm(struct ceph_inode_info *ci) |
| 904 | { |
| 905 | struct ceph_snap_realm *realm = ci->i_snap_realm; |
| 906 | spin_lock(&realm->inodes_with_caps_lock); |
| 907 | list_del_init(&ci->i_snap_realm_item); |
| 908 | ci->i_snap_realm_counter++; |
| 909 | ci->i_snap_realm = NULL; |
| 910 | spin_unlock(&realm->inodes_with_caps_lock); |
| 911 | ceph_put_snap_realm(ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc, |
| 912 | realm); |
| 913 | } |
| 914 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 915 | /* |
Sage Weil | f818a73 | 2010-05-11 20:56:31 -0700 | [diff] [blame] | 916 | * Remove a cap. Take steps to deal with a racing iterate_session_caps. |
| 917 | * |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 918 | * caller should hold i_ceph_lock. |
Sage Weil | a636974 | 2010-02-22 13:59:00 -0800 | [diff] [blame] | 919 | * caller will not hold session s_mutex if called from destroy_inode. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 920 | */ |
Yan, Zheng | a096b09 | 2013-09-22 10:15:58 +0800 | [diff] [blame] | 921 | void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 922 | { |
| 923 | struct ceph_mds_session *session = cap->session; |
| 924 | struct ceph_inode_info *ci = cap->ci; |
Cheng Renquan | 640ef79 | 2010-03-26 17:40:33 +0800 | [diff] [blame] | 925 | struct ceph_mds_client *mdsc = |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 926 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
Sage Weil | f818a73 | 2010-05-11 20:56:31 -0700 | [diff] [blame] | 927 | int removed = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 928 | |
| 929 | dout("__ceph_remove_cap %p from %p\n", cap, &ci->vfs_inode); |
| 930 | |
Sage Weil | 7c1332b | 2010-02-16 11:39:45 -0800 | [diff] [blame] | 931 | /* remove from session list */ |
| 932 | spin_lock(&session->s_cap_lock); |
| 933 | if (session->s_cap_iterator == cap) { |
| 934 | /* not yet, we are iterating over this very cap */ |
| 935 | dout("__ceph_remove_cap delaying %p removal from session %p\n", |
| 936 | cap, cap->session); |
| 937 | } else { |
| 938 | list_del_init(&cap->session_caps); |
| 939 | session->s_nr_caps--; |
| 940 | cap->session = NULL; |
Sage Weil | f818a73 | 2010-05-11 20:56:31 -0700 | [diff] [blame] | 941 | removed = 1; |
Sage Weil | 7c1332b | 2010-02-16 11:39:45 -0800 | [diff] [blame] | 942 | } |
Sage Weil | f818a73 | 2010-05-11 20:56:31 -0700 | [diff] [blame] | 943 | /* protect backpointer with s_cap_lock: see iterate_session_caps */ |
| 944 | cap->ci = NULL; |
Yan, Zheng | 745a8e3 | 2015-05-14 17:22:42 +0800 | [diff] [blame] | 945 | |
| 946 | /* |
| 947 | * s_cap_reconnect is protected by s_cap_lock. no one changes |
| 948 | * s_cap_gen while session is in the reconnect state. |
| 949 | */ |
| 950 | if (queue_release && |
| 951 | (!session->s_cap_reconnect || cap->cap_gen == session->s_cap_gen)) { |
| 952 | cap->queue_release = 1; |
| 953 | if (removed) { |
| 954 | list_add_tail(&cap->session_caps, |
| 955 | &session->s_cap_releases); |
| 956 | session->s_num_cap_releases++; |
| 957 | removed = 0; |
| 958 | } |
| 959 | } else { |
| 960 | cap->queue_release = 0; |
| 961 | } |
| 962 | cap->cap_ino = ci->i_vino.ino; |
| 963 | |
Sage Weil | 7c1332b | 2010-02-16 11:39:45 -0800 | [diff] [blame] | 964 | spin_unlock(&session->s_cap_lock); |
| 965 | |
Sage Weil | f818a73 | 2010-05-11 20:56:31 -0700 | [diff] [blame] | 966 | /* remove from inode list */ |
| 967 | rb_erase(&cap->ci_node, &ci->i_caps); |
| 968 | if (ci->i_auth_cap == cap) |
| 969 | ci->i_auth_cap = NULL; |
| 970 | |
| 971 | if (removed) |
Yehuda Sadeh | 3715166 | 2010-06-17 16:16:12 -0700 | [diff] [blame] | 972 | ceph_put_cap(mdsc, cap); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 973 | |
Yan, Zheng | db40cc1 | 2015-03-23 20:12:20 +0800 | [diff] [blame] | 974 | /* when reconnect denied, we remove session caps forcibly, |
| 975 | * i_wr_ref can be non-zero. If there are ongoing write, |
| 976 | * keep i_snap_realm. |
| 977 | */ |
| 978 | if (!__ceph_is_any_caps(ci) && ci->i_wr_ref == 0 && ci->i_snap_realm) |
| 979 | drop_inode_snap_realm(ci); |
| 980 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 981 | if (!__ceph_is_any_real_caps(ci)) |
| 982 | __cap_delay_cancel(mdsc, ci); |
| 983 | } |
| 984 | |
| 985 | /* |
| 986 | * Build and send a cap message to the given MDS. |
| 987 | * |
| 988 | * Caller should be holding s_mutex. |
| 989 | */ |
| 990 | static int send_cap_msg(struct ceph_mds_session *session, |
| 991 | u64 ino, u64 cid, int op, |
| 992 | int caps, int wanted, int dirty, |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 993 | u32 seq, u64 flush_tid, u64 oldest_flush_tid, |
| 994 | u32 issue_seq, u32 mseq, u64 size, u64 max_size, |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 995 | struct timespec *mtime, struct timespec *atime, |
Yan, Zheng | d1eee0c | 2016-01-22 18:30:12 +0800 | [diff] [blame] | 996 | struct timespec *ctime, u64 time_warp_seq, |
Eric W. Biederman | 05cb11c | 2013-01-31 02:56:19 -0800 | [diff] [blame] | 997 | kuid_t uid, kgid_t gid, umode_t mode, |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 998 | u64 xattr_version, |
| 999 | struct ceph_buffer *xattrs_buf, |
Yan, Zheng | e20d258 | 2014-11-14 22:39:13 +0800 | [diff] [blame] | 1000 | u64 follows, bool inline_data) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1001 | { |
| 1002 | struct ceph_mds_caps *fc; |
| 1003 | struct ceph_msg *msg; |
Yan, Zheng | e20d258 | 2014-11-14 22:39:13 +0800 | [diff] [blame] | 1004 | void *p; |
| 1005 | size_t extra_len; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1006 | |
| 1007 | dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s" |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1008 | " seq %u/%u tid %llu/%llu mseq %u follows %lld size %llu/%llu" |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1009 | " xattr_ver %llu xattr_len %d\n", ceph_cap_op_name(op), |
| 1010 | cid, ino, ceph_cap_string(caps), ceph_cap_string(wanted), |
| 1011 | ceph_cap_string(dirty), |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1012 | seq, issue_seq, flush_tid, oldest_flush_tid, |
| 1013 | mseq, follows, size, max_size, |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1014 | xattr_version, xattrs_buf ? (int)xattrs_buf->vec.iov_len : 0); |
| 1015 | |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1016 | /* flock buffer size + inline version + inline data size + |
| 1017 | * osd_epoch_barrier + oldest_flush_tid */ |
| 1018 | extra_len = 4 + 8 + 4 + 4 + 8; |
Yan, Zheng | e20d258 | 2014-11-14 22:39:13 +0800 | [diff] [blame] | 1019 | msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, sizeof(*fc) + extra_len, |
| 1020 | GFP_NOFS, false); |
Sage Weil | a79832f | 2010-04-01 16:06:19 -0700 | [diff] [blame] | 1021 | if (!msg) |
| 1022 | return -ENOMEM; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1023 | |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1024 | msg->hdr.version = cpu_to_le16(6); |
Sage Weil | 6df058c | 2009-12-22 11:24:33 -0800 | [diff] [blame] | 1025 | msg->hdr.tid = cpu_to_le64(flush_tid); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1026 | |
Sage Weil | 6df058c | 2009-12-22 11:24:33 -0800 | [diff] [blame] | 1027 | fc = msg->front.iov_base; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1028 | memset(fc, 0, sizeof(*fc)); |
| 1029 | |
| 1030 | fc->cap_id = cpu_to_le64(cid); |
| 1031 | fc->op = cpu_to_le32(op); |
| 1032 | fc->seq = cpu_to_le32(seq); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1033 | fc->issue_seq = cpu_to_le32(issue_seq); |
| 1034 | fc->migrate_seq = cpu_to_le32(mseq); |
| 1035 | fc->caps = cpu_to_le32(caps); |
| 1036 | fc->wanted = cpu_to_le32(wanted); |
| 1037 | fc->dirty = cpu_to_le32(dirty); |
| 1038 | fc->ino = cpu_to_le64(ino); |
| 1039 | fc->snap_follows = cpu_to_le64(follows); |
| 1040 | |
| 1041 | fc->size = cpu_to_le64(size); |
| 1042 | fc->max_size = cpu_to_le64(max_size); |
| 1043 | if (mtime) |
| 1044 | ceph_encode_timespec(&fc->mtime, mtime); |
| 1045 | if (atime) |
| 1046 | ceph_encode_timespec(&fc->atime, atime); |
Yan, Zheng | d1eee0c | 2016-01-22 18:30:12 +0800 | [diff] [blame] | 1047 | if (ctime) |
| 1048 | ceph_encode_timespec(&fc->ctime, ctime); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1049 | fc->time_warp_seq = cpu_to_le32(time_warp_seq); |
| 1050 | |
Eric W. Biederman | 05cb11c | 2013-01-31 02:56:19 -0800 | [diff] [blame] | 1051 | fc->uid = cpu_to_le32(from_kuid(&init_user_ns, uid)); |
| 1052 | fc->gid = cpu_to_le32(from_kgid(&init_user_ns, gid)); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1053 | fc->mode = cpu_to_le32(mode); |
| 1054 | |
Yan, Zheng | e20d258 | 2014-11-14 22:39:13 +0800 | [diff] [blame] | 1055 | p = fc + 1; |
| 1056 | /* flock buffer size */ |
| 1057 | ceph_encode_32(&p, 0); |
| 1058 | /* inline version */ |
| 1059 | ceph_encode_64(&p, inline_data ? 0 : CEPH_INLINE_NONE); |
| 1060 | /* inline data size */ |
| 1061 | ceph_encode_32(&p, 0); |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1062 | /* osd_epoch_barrier */ |
| 1063 | ceph_encode_32(&p, 0); |
| 1064 | /* oldest_flush_tid */ |
| 1065 | ceph_encode_64(&p, oldest_flush_tid); |
Yan, Zheng | e20d258 | 2014-11-14 22:39:13 +0800 | [diff] [blame] | 1066 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1067 | fc->xattr_version = cpu_to_le64(xattr_version); |
| 1068 | if (xattrs_buf) { |
| 1069 | msg->middle = ceph_buffer_get(xattrs_buf); |
| 1070 | fc->xattr_len = cpu_to_le32(xattrs_buf->vec.iov_len); |
| 1071 | msg->hdr.middle_len = cpu_to_le32(xattrs_buf->vec.iov_len); |
| 1072 | } |
| 1073 | |
| 1074 | ceph_con_send(&session->s_con, msg); |
| 1075 | return 0; |
| 1076 | } |
| 1077 | |
| 1078 | /* |
Sage Weil | a636974 | 2010-02-22 13:59:00 -0800 | [diff] [blame] | 1079 | * Queue cap releases when an inode is dropped from our cache. Since |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1080 | * inode is about to be destroyed, there is no need for i_ceph_lock. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1081 | */ |
| 1082 | void ceph_queue_caps_release(struct inode *inode) |
| 1083 | { |
| 1084 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 1085 | struct rb_node *p; |
| 1086 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1087 | p = rb_first(&ci->i_caps); |
| 1088 | while (p) { |
| 1089 | struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1090 | p = rb_next(p); |
Yan, Zheng | a096b09 | 2013-09-22 10:15:58 +0800 | [diff] [blame] | 1091 | __ceph_remove_cap(cap, true); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1092 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1093 | } |
| 1094 | |
| 1095 | /* |
| 1096 | * Send a cap msg on the given inode. Update our caps state, then |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1097 | * drop i_ceph_lock and send the message. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1098 | * |
| 1099 | * Make note of max_size reported/requested from mds, revoked caps |
| 1100 | * that have now been implemented. |
| 1101 | * |
| 1102 | * Make half-hearted attempt ot to invalidate page cache if we are |
| 1103 | * dropping RDCACHE. Note that this will leave behind locked pages |
| 1104 | * that we'll then need to deal with elsewhere. |
| 1105 | * |
| 1106 | * Return non-zero if delayed release, or we experienced an error |
| 1107 | * such that the caller should requeue + retry later. |
| 1108 | * |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1109 | * called with i_ceph_lock, then drops it. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1110 | * caller should hold snap_rwsem (read), s_mutex. |
| 1111 | */ |
| 1112 | static int __send_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap, |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1113 | int op, int used, int want, int retain, int flushing, |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1114 | u64 flush_tid, u64 oldest_flush_tid) |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1115 | __releases(cap->ci->i_ceph_lock) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1116 | { |
| 1117 | struct ceph_inode_info *ci = cap->ci; |
| 1118 | struct inode *inode = &ci->vfs_inode; |
| 1119 | u64 cap_id = cap->cap_id; |
Sage Weil | 68c2832 | 2010-02-09 13:41:47 -0800 | [diff] [blame] | 1120 | int held, revoking, dropping, keep; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1121 | u64 seq, issue_seq, mseq, time_warp_seq, follows; |
| 1122 | u64 size, max_size; |
Yan, Zheng | d1eee0c | 2016-01-22 18:30:12 +0800 | [diff] [blame] | 1123 | struct timespec mtime, atime, ctime; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1124 | int wake = 0; |
Al Viro | 5706b27 | 2011-07-26 04:52:22 -0400 | [diff] [blame] | 1125 | umode_t mode; |
Eric W. Biederman | 05cb11c | 2013-01-31 02:56:19 -0800 | [diff] [blame] | 1126 | kuid_t uid; |
| 1127 | kgid_t gid; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1128 | struct ceph_mds_session *session; |
| 1129 | u64 xattr_version = 0; |
Sage Weil | 082afec | 2010-08-22 15:16:41 -0700 | [diff] [blame] | 1130 | struct ceph_buffer *xattr_blob = NULL; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1131 | int delayed = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1132 | int ret; |
Yan, Zheng | e20d258 | 2014-11-14 22:39:13 +0800 | [diff] [blame] | 1133 | bool inline_data; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1134 | |
Sage Weil | 68c2832 | 2010-02-09 13:41:47 -0800 | [diff] [blame] | 1135 | held = cap->issued | cap->implemented; |
| 1136 | revoking = cap->implemented & ~cap->issued; |
| 1137 | retain &= ~revoking; |
| 1138 | dropping = cap->issued & ~retain; |
| 1139 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1140 | dout("__send_cap %p cap %p session %p %s -> %s (revoking %s)\n", |
| 1141 | inode, cap, cap->session, |
| 1142 | ceph_cap_string(held), ceph_cap_string(held & retain), |
| 1143 | ceph_cap_string(revoking)); |
| 1144 | BUG_ON((retain & CEPH_CAP_PIN) == 0); |
| 1145 | |
| 1146 | session = cap->session; |
| 1147 | |
| 1148 | /* don't release wanted unless we've waited a bit. */ |
| 1149 | if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0 && |
| 1150 | time_before(jiffies, ci->i_hold_caps_min)) { |
| 1151 | dout(" delaying issued %s -> %s, wanted %s -> %s on send\n", |
| 1152 | ceph_cap_string(cap->issued), |
| 1153 | ceph_cap_string(cap->issued & retain), |
| 1154 | ceph_cap_string(cap->mds_wanted), |
| 1155 | ceph_cap_string(want)); |
| 1156 | want |= cap->mds_wanted; |
| 1157 | retain |= cap->issued; |
| 1158 | delayed = 1; |
| 1159 | } |
| 1160 | ci->i_ceph_flags &= ~(CEPH_I_NODELAY | CEPH_I_FLUSH); |
| 1161 | |
| 1162 | cap->issued &= retain; /* drop bits we don't want */ |
| 1163 | if (cap->implemented & ~cap->issued) { |
| 1164 | /* |
| 1165 | * Wake up any waiters on wanted -> needed transition. |
| 1166 | * This is due to the weird transition from buffered |
| 1167 | * to sync IO... we need to flush dirty pages _before_ |
| 1168 | * allowing sync writes to avoid reordering. |
| 1169 | */ |
| 1170 | wake = 1; |
| 1171 | } |
| 1172 | cap->implemented &= cap->issued | used; |
| 1173 | cap->mds_wanted = want; |
| 1174 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1175 | follows = flushing ? ci->i_head_snapc->seq : 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1176 | |
| 1177 | keep = cap->implemented; |
| 1178 | seq = cap->seq; |
| 1179 | issue_seq = cap->issue_seq; |
| 1180 | mseq = cap->mseq; |
| 1181 | size = inode->i_size; |
| 1182 | ci->i_reported_size = size; |
| 1183 | max_size = ci->i_wanted_max_size; |
| 1184 | ci->i_requested_max_size = max_size; |
| 1185 | mtime = inode->i_mtime; |
| 1186 | atime = inode->i_atime; |
Yan, Zheng | d1eee0c | 2016-01-22 18:30:12 +0800 | [diff] [blame] | 1187 | ctime = inode->i_ctime; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1188 | time_warp_seq = ci->i_time_warp_seq; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1189 | uid = inode->i_uid; |
| 1190 | gid = inode->i_gid; |
| 1191 | mode = inode->i_mode; |
| 1192 | |
Sage Weil | 082afec | 2010-08-22 15:16:41 -0700 | [diff] [blame] | 1193 | if (flushing & CEPH_CAP_XATTR_EXCL) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1194 | __ceph_build_xattrs_blob(ci); |
Sage Weil | 082afec | 2010-08-22 15:16:41 -0700 | [diff] [blame] | 1195 | xattr_blob = ci->i_xattrs.blob; |
| 1196 | xattr_version = ci->i_xattrs.version; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1197 | } |
| 1198 | |
Yan, Zheng | e20d258 | 2014-11-14 22:39:13 +0800 | [diff] [blame] | 1199 | inline_data = ci->i_inline_version != CEPH_INLINE_NONE; |
| 1200 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1201 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1202 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1203 | ret = send_cap_msg(session, ceph_vino(inode).ino, cap_id, |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1204 | op, keep, want, flushing, seq, |
| 1205 | flush_tid, oldest_flush_tid, issue_seq, mseq, |
Yan, Zheng | d1eee0c | 2016-01-22 18:30:12 +0800 | [diff] [blame] | 1206 | size, max_size, &mtime, &atime, &ctime, time_warp_seq, |
Sage Weil | 082afec | 2010-08-22 15:16:41 -0700 | [diff] [blame] | 1207 | uid, gid, mode, xattr_version, xattr_blob, |
Yan, Zheng | e20d258 | 2014-11-14 22:39:13 +0800 | [diff] [blame] | 1208 | follows, inline_data); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1209 | if (ret < 0) { |
| 1210 | dout("error sending cap msg, must requeue %p\n", inode); |
| 1211 | delayed = 1; |
| 1212 | } |
| 1213 | |
| 1214 | if (wake) |
Yehuda Sadeh | 03066f2 | 2010-07-27 13:11:08 -0700 | [diff] [blame] | 1215 | wake_up_all(&ci->i_cap_wq); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1216 | |
| 1217 | return delayed; |
| 1218 | } |
| 1219 | |
| 1220 | /* |
| 1221 | * When a snapshot is taken, clients accumulate dirty metadata on |
| 1222 | * inodes with capabilities in ceph_cap_snaps to describe the file |
| 1223 | * state at the time the snapshot was taken. This must be flushed |
| 1224 | * asynchronously back to the MDS once sync writes complete and dirty |
| 1225 | * data is written out. |
| 1226 | * |
Yan, Zheng | affbc19 | 2015-05-05 21:22:13 +0800 | [diff] [blame] | 1227 | * Unless @kick is true, skip cap_snaps that were already sent to |
Sage Weil | e835124 | 2010-09-17 08:03:08 -0700 | [diff] [blame] | 1228 | * the MDS (i.e., during this session). |
| 1229 | * |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1230 | * Called under i_ceph_lock. Takes s_mutex as needed. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1231 | */ |
| 1232 | void __ceph_flush_snaps(struct ceph_inode_info *ci, |
Sage Weil | e835124 | 2010-09-17 08:03:08 -0700 | [diff] [blame] | 1233 | struct ceph_mds_session **psession, |
Yan, Zheng | affbc19 | 2015-05-05 21:22:13 +0800 | [diff] [blame] | 1234 | int kick) |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1235 | __releases(ci->i_ceph_lock) |
| 1236 | __acquires(ci->i_ceph_lock) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1237 | { |
| 1238 | struct inode *inode = &ci->vfs_inode; |
| 1239 | int mds; |
| 1240 | struct ceph_cap_snap *capsnap; |
| 1241 | u32 mseq; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1242 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1243 | struct ceph_mds_session *session = NULL; /* if session != NULL, we hold |
| 1244 | session->s_mutex */ |
| 1245 | u64 next_follows = 0; /* keep track of how far we've gotten through the |
| 1246 | i_cap_snaps list, and skip these entries next time |
| 1247 | around to avoid an infinite loop */ |
| 1248 | |
| 1249 | if (psession) |
| 1250 | session = *psession; |
| 1251 | |
| 1252 | dout("__flush_snaps %p\n", inode); |
| 1253 | retry: |
| 1254 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { |
| 1255 | /* avoid an infiniute loop after retry */ |
| 1256 | if (capsnap->follows < next_follows) |
| 1257 | continue; |
| 1258 | /* |
| 1259 | * we need to wait for sync writes to complete and for dirty |
| 1260 | * pages to be written out. |
| 1261 | */ |
| 1262 | if (capsnap->dirty_pages || capsnap->writing) |
Sage Weil | cfc0bf6 | 2010-09-14 15:50:59 -0700 | [diff] [blame] | 1263 | break; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1264 | |
Yan, Zheng | 8605609 | 2015-05-01 16:57:16 +0800 | [diff] [blame] | 1265 | /* should be removed by ceph_try_drop_cap_snap() */ |
| 1266 | BUG_ON(!capsnap->need_flush); |
Sage Weil | 819ccbf | 2010-04-01 09:33:46 -0700 | [diff] [blame] | 1267 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1268 | /* pick mds, take s_mutex */ |
Sage Weil | ca81f3f | 2010-06-10 14:21:36 -0700 | [diff] [blame] | 1269 | if (ci->i_auth_cap == NULL) { |
| 1270 | dout("no auth cap (migrating?), doing nothing\n"); |
| 1271 | goto out; |
| 1272 | } |
Sage Weil | e835124 | 2010-09-17 08:03:08 -0700 | [diff] [blame] | 1273 | |
| 1274 | /* only flush each capsnap once */ |
Yan, Zheng | affbc19 | 2015-05-05 21:22:13 +0800 | [diff] [blame] | 1275 | if (!kick && !list_empty(&capsnap->flushing_item)) { |
Sage Weil | e835124 | 2010-09-17 08:03:08 -0700 | [diff] [blame] | 1276 | dout("already flushed %p, skipping\n", capsnap); |
| 1277 | continue; |
| 1278 | } |
| 1279 | |
Sage Weil | ca81f3f | 2010-06-10 14:21:36 -0700 | [diff] [blame] | 1280 | mds = ci->i_auth_cap->session->s_mds; |
| 1281 | mseq = ci->i_auth_cap->mseq; |
| 1282 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1283 | if (session && session->s_mds != mds) { |
| 1284 | dout("oops, wrong session %p mutex\n", session); |
Yan, Zheng | affbc19 | 2015-05-05 21:22:13 +0800 | [diff] [blame] | 1285 | if (kick) |
| 1286 | goto out; |
| 1287 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1288 | mutex_unlock(&session->s_mutex); |
| 1289 | ceph_put_mds_session(session); |
| 1290 | session = NULL; |
| 1291 | } |
| 1292 | if (!session) { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1293 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1294 | mutex_lock(&mdsc->mutex); |
| 1295 | session = __ceph_lookup_mds_session(mdsc, mds); |
| 1296 | mutex_unlock(&mdsc->mutex); |
| 1297 | if (session) { |
| 1298 | dout("inverting session/ino locks on %p\n", |
| 1299 | session); |
| 1300 | mutex_lock(&session->s_mutex); |
| 1301 | } |
| 1302 | /* |
| 1303 | * if session == NULL, we raced against a cap |
Sage Weil | ca81f3f | 2010-06-10 14:21:36 -0700 | [diff] [blame] | 1304 | * deletion or migration. retry, and we'll |
| 1305 | * get a better @mds value next time. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1306 | */ |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1307 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1308 | goto retry; |
| 1309 | } |
| 1310 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1311 | spin_lock(&mdsc->cap_dirty_lock); |
| 1312 | capsnap->flush_tid = ++mdsc->last_cap_flush_tid; |
| 1313 | spin_unlock(&mdsc->cap_dirty_lock); |
| 1314 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1315 | atomic_inc(&capsnap->nref); |
Yan, Zheng | affbc19 | 2015-05-05 21:22:13 +0800 | [diff] [blame] | 1316 | if (list_empty(&capsnap->flushing_item)) |
| 1317 | list_add_tail(&capsnap->flushing_item, |
| 1318 | &session->s_cap_snaps_flushing); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1319 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1320 | |
Sage Weil | cfc0bf6 | 2010-09-14 15:50:59 -0700 | [diff] [blame] | 1321 | dout("flush_snaps %p cap_snap %p follows %lld tid %llu\n", |
| 1322 | inode, capsnap, capsnap->follows, capsnap->flush_tid); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1323 | send_cap_msg(session, ceph_vino(inode).ino, 0, |
| 1324 | CEPH_CAP_OP_FLUSHSNAP, capsnap->issued, 0, |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1325 | capsnap->dirty, 0, capsnap->flush_tid, 0, |
| 1326 | 0, mseq, capsnap->size, 0, |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1327 | &capsnap->mtime, &capsnap->atime, |
Yan, Zheng | d1eee0c | 2016-01-22 18:30:12 +0800 | [diff] [blame] | 1328 | &capsnap->ctime, capsnap->time_warp_seq, |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1329 | capsnap->uid, capsnap->gid, capsnap->mode, |
Sage Weil | 4a625be | 2010-08-22 15:03:56 -0700 | [diff] [blame] | 1330 | capsnap->xattr_version, capsnap->xattr_blob, |
Yan, Zheng | e20d258 | 2014-11-14 22:39:13 +0800 | [diff] [blame] | 1331 | capsnap->follows, capsnap->inline_data); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1332 | |
| 1333 | next_follows = capsnap->follows + 1; |
| 1334 | ceph_put_cap_snap(capsnap); |
| 1335 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1336 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1337 | goto retry; |
| 1338 | } |
| 1339 | |
| 1340 | /* we flushed them all; remove this inode from the queue */ |
| 1341 | spin_lock(&mdsc->snap_flush_lock); |
| 1342 | list_del_init(&ci->i_snap_flush_item); |
| 1343 | spin_unlock(&mdsc->snap_flush_lock); |
| 1344 | |
Sage Weil | ca81f3f | 2010-06-10 14:21:36 -0700 | [diff] [blame] | 1345 | out: |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1346 | if (psession) |
| 1347 | *psession = session; |
| 1348 | else if (session) { |
| 1349 | mutex_unlock(&session->s_mutex); |
| 1350 | ceph_put_mds_session(session); |
| 1351 | } |
| 1352 | } |
| 1353 | |
| 1354 | static void ceph_flush_snaps(struct ceph_inode_info *ci) |
| 1355 | { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1356 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | e835124 | 2010-09-17 08:03:08 -0700 | [diff] [blame] | 1357 | __ceph_flush_snaps(ci, NULL, 0); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1358 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1359 | } |
| 1360 | |
| 1361 | /* |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 1362 | * Mark caps dirty. If inode is newly dirty, return the dirty flags. |
| 1363 | * Caller is then responsible for calling __mark_inode_dirty with the |
| 1364 | * returned flags value. |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1365 | */ |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 1366 | int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, |
| 1367 | struct ceph_cap_flush **pcf) |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1368 | { |
Cheng Renquan | 640ef79 | 2010-03-26 17:40:33 +0800 | [diff] [blame] | 1369 | struct ceph_mds_client *mdsc = |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1370 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1371 | struct inode *inode = &ci->vfs_inode; |
| 1372 | int was = ci->i_dirty_caps; |
| 1373 | int dirty = 0; |
| 1374 | |
Yan, Zheng | 571ade3 | 2015-03-24 11:36:08 +0800 | [diff] [blame] | 1375 | if (!ci->i_auth_cap) { |
| 1376 | pr_warn("__mark_dirty_caps %p %llx mask %s, " |
| 1377 | "but no auth cap (session was closed?)\n", |
| 1378 | inode, ceph_ino(inode), ceph_cap_string(mask)); |
| 1379 | return 0; |
| 1380 | } |
| 1381 | |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1382 | dout("__mark_dirty_caps %p %s dirty %s -> %s\n", &ci->vfs_inode, |
| 1383 | ceph_cap_string(mask), ceph_cap_string(was), |
| 1384 | ceph_cap_string(was | mask)); |
| 1385 | ci->i_dirty_caps |= mask; |
| 1386 | if (was == 0) { |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 1387 | WARN_ON_ONCE(ci->i_prealloc_cap_flush); |
| 1388 | swap(ci->i_prealloc_cap_flush, *pcf); |
| 1389 | |
Yan, Zheng | 604d1b0 | 2015-05-01 17:49:16 +0800 | [diff] [blame] | 1390 | if (!ci->i_head_snapc) { |
| 1391 | WARN_ON_ONCE(!rwsem_is_locked(&mdsc->snap_rwsem)); |
Sage Weil | 7d8cb26 | 2010-08-24 08:44:16 -0700 | [diff] [blame] | 1392 | ci->i_head_snapc = ceph_get_snap_context( |
| 1393 | ci->i_snap_realm->cached_context); |
Yan, Zheng | 604d1b0 | 2015-05-01 17:49:16 +0800 | [diff] [blame] | 1394 | } |
Yan, Zheng | 0685235 | 2012-11-19 10:49:07 +0800 | [diff] [blame] | 1395 | dout(" inode %p now dirty snapc %p auth cap %p\n", |
| 1396 | &ci->vfs_inode, ci->i_head_snapc, ci->i_auth_cap); |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1397 | BUG_ON(!list_empty(&ci->i_dirty_item)); |
| 1398 | spin_lock(&mdsc->cap_dirty_lock); |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 1399 | list_add(&ci->i_dirty_item, &mdsc->cap_dirty); |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1400 | spin_unlock(&mdsc->cap_dirty_lock); |
| 1401 | if (ci->i_flushing_caps == 0) { |
Sage Weil | 3772d26 | 2011-05-03 09:28:08 -0700 | [diff] [blame] | 1402 | ihold(inode); |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1403 | dirty |= I_DIRTY_SYNC; |
| 1404 | } |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 1405 | } else { |
| 1406 | WARN_ON_ONCE(!ci->i_prealloc_cap_flush); |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1407 | } |
| 1408 | BUG_ON(list_empty(&ci->i_dirty_item)); |
| 1409 | if (((was | ci->i_flushing_caps) & CEPH_CAP_FILE_BUFFER) && |
| 1410 | (mask & CEPH_CAP_FILE_BUFFER)) |
| 1411 | dirty |= I_DIRTY_DATASYNC; |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1412 | __cap_delay_requeue(mdsc, ci); |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 1413 | return dirty; |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1414 | } |
| 1415 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1416 | static void __add_cap_flushing_to_inode(struct ceph_inode_info *ci, |
| 1417 | struct ceph_cap_flush *cf) |
| 1418 | { |
| 1419 | struct rb_node **p = &ci->i_cap_flush_tree.rb_node; |
| 1420 | struct rb_node *parent = NULL; |
| 1421 | struct ceph_cap_flush *other = NULL; |
| 1422 | |
| 1423 | while (*p) { |
| 1424 | parent = *p; |
| 1425 | other = rb_entry(parent, struct ceph_cap_flush, i_node); |
| 1426 | |
| 1427 | if (cf->tid < other->tid) |
| 1428 | p = &(*p)->rb_left; |
| 1429 | else if (cf->tid > other->tid) |
| 1430 | p = &(*p)->rb_right; |
| 1431 | else |
| 1432 | BUG(); |
| 1433 | } |
| 1434 | |
| 1435 | rb_link_node(&cf->i_node, parent, p); |
| 1436 | rb_insert_color(&cf->i_node, &ci->i_cap_flush_tree); |
| 1437 | } |
| 1438 | |
Yan, Zheng | 8310b08 | 2015-06-09 17:20:12 +0800 | [diff] [blame] | 1439 | static void __add_cap_flushing_to_mdsc(struct ceph_mds_client *mdsc, |
| 1440 | struct ceph_cap_flush *cf) |
| 1441 | { |
| 1442 | struct rb_node **p = &mdsc->cap_flush_tree.rb_node; |
| 1443 | struct rb_node *parent = NULL; |
| 1444 | struct ceph_cap_flush *other = NULL; |
| 1445 | |
| 1446 | while (*p) { |
| 1447 | parent = *p; |
| 1448 | other = rb_entry(parent, struct ceph_cap_flush, g_node); |
| 1449 | |
| 1450 | if (cf->tid < other->tid) |
| 1451 | p = &(*p)->rb_left; |
| 1452 | else if (cf->tid > other->tid) |
| 1453 | p = &(*p)->rb_right; |
| 1454 | else |
| 1455 | BUG(); |
| 1456 | } |
| 1457 | |
| 1458 | rb_link_node(&cf->g_node, parent, p); |
| 1459 | rb_insert_color(&cf->g_node, &mdsc->cap_flush_tree); |
| 1460 | } |
| 1461 | |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 1462 | struct ceph_cap_flush *ceph_alloc_cap_flush(void) |
| 1463 | { |
| 1464 | return kmem_cache_alloc(ceph_cap_flush_cachep, GFP_KERNEL); |
| 1465 | } |
| 1466 | |
| 1467 | void ceph_free_cap_flush(struct ceph_cap_flush *cf) |
| 1468 | { |
| 1469 | if (cf) |
| 1470 | kmem_cache_free(ceph_cap_flush_cachep, cf); |
| 1471 | } |
| 1472 | |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1473 | static u64 __get_oldest_flush_tid(struct ceph_mds_client *mdsc) |
| 1474 | { |
| 1475 | struct rb_node *n = rb_first(&mdsc->cap_flush_tree); |
| 1476 | if (n) { |
| 1477 | struct ceph_cap_flush *cf = |
| 1478 | rb_entry(n, struct ceph_cap_flush, g_node); |
| 1479 | return cf->tid; |
| 1480 | } |
| 1481 | return 0; |
| 1482 | } |
| 1483 | |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 1484 | /* |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1485 | * Add dirty inode to the flushing list. Assigned a seq number so we |
| 1486 | * can wait for caps to flush without starving. |
Sage Weil | cdc35f9 | 2009-10-14 14:24:19 -0700 | [diff] [blame] | 1487 | * |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1488 | * Called under i_ceph_lock. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1489 | */ |
Sage Weil | cdc35f9 | 2009-10-14 14:24:19 -0700 | [diff] [blame] | 1490 | static int __mark_caps_flushing(struct inode *inode, |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1491 | struct ceph_mds_session *session, |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1492 | u64 *flush_tid, u64 *oldest_flush_tid) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1493 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1494 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1495 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 1496 | struct ceph_cap_flush *cf = NULL; |
Sage Weil | cdc35f9 | 2009-10-14 14:24:19 -0700 | [diff] [blame] | 1497 | int flushing; |
Sage Weil | 50b885b | 2009-12-01 14:12:07 -0800 | [diff] [blame] | 1498 | |
Sage Weil | cdc35f9 | 2009-10-14 14:24:19 -0700 | [diff] [blame] | 1499 | BUG_ON(ci->i_dirty_caps == 0); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1500 | BUG_ON(list_empty(&ci->i_dirty_item)); |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 1501 | BUG_ON(!ci->i_prealloc_cap_flush); |
Sage Weil | cdc35f9 | 2009-10-14 14:24:19 -0700 | [diff] [blame] | 1502 | |
| 1503 | flushing = ci->i_dirty_caps; |
| 1504 | dout("__mark_caps_flushing flushing %s, flushing_caps %s -> %s\n", |
| 1505 | ceph_cap_string(flushing), |
| 1506 | ceph_cap_string(ci->i_flushing_caps), |
| 1507 | ceph_cap_string(ci->i_flushing_caps | flushing)); |
| 1508 | ci->i_flushing_caps |= flushing; |
| 1509 | ci->i_dirty_caps = 0; |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 1510 | dout(" inode %p now !dirty\n", inode); |
Sage Weil | cdc35f9 | 2009-10-14 14:24:19 -0700 | [diff] [blame] | 1511 | |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 1512 | swap(cf, ci->i_prealloc_cap_flush); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1513 | cf->caps = flushing; |
| 1514 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1515 | spin_lock(&mdsc->cap_dirty_lock); |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 1516 | list_del_init(&ci->i_dirty_item); |
| 1517 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1518 | cf->tid = ++mdsc->last_cap_flush_tid; |
Yan, Zheng | 8310b08 | 2015-06-09 17:20:12 +0800 | [diff] [blame] | 1519 | __add_cap_flushing_to_mdsc(mdsc, cf); |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1520 | *oldest_flush_tid = __get_oldest_flush_tid(mdsc); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1521 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1522 | if (list_empty(&ci->i_flushing_item)) { |
| 1523 | list_add_tail(&ci->i_flushing_item, &session->s_cap_flushing); |
| 1524 | mdsc->num_cap_flushing++; |
Yan, Zheng | 8310b08 | 2015-06-09 17:20:12 +0800 | [diff] [blame] | 1525 | dout(" inode %p now flushing tid %llu\n", inode, cf->tid); |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 1526 | } else { |
| 1527 | list_move_tail(&ci->i_flushing_item, &session->s_cap_flushing); |
Yan, Zheng | 8310b08 | 2015-06-09 17:20:12 +0800 | [diff] [blame] | 1528 | dout(" inode %p now flushing (more) tid %llu\n", |
| 1529 | inode, cf->tid); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1530 | } |
| 1531 | spin_unlock(&mdsc->cap_dirty_lock); |
Sage Weil | cdc35f9 | 2009-10-14 14:24:19 -0700 | [diff] [blame] | 1532 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1533 | __add_cap_flushing_to_inode(ci, cf); |
| 1534 | |
| 1535 | *flush_tid = cf->tid; |
Sage Weil | cdc35f9 | 2009-10-14 14:24:19 -0700 | [diff] [blame] | 1536 | return flushing; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1537 | } |
| 1538 | |
| 1539 | /* |
Sage Weil | 5ecad6f | 2010-02-17 10:43:37 -0800 | [diff] [blame] | 1540 | * try to invalidate mapping pages without blocking. |
| 1541 | */ |
Sage Weil | 5ecad6f | 2010-02-17 10:43:37 -0800 | [diff] [blame] | 1542 | static int try_nonblocking_invalidate(struct inode *inode) |
| 1543 | { |
| 1544 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 1545 | u32 invalidating_gen = ci->i_rdcache_gen; |
| 1546 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1547 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 5ecad6f | 2010-02-17 10:43:37 -0800 | [diff] [blame] | 1548 | invalidate_mapping_pages(&inode->i_data, 0, -1); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1549 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 5ecad6f | 2010-02-17 10:43:37 -0800 | [diff] [blame] | 1550 | |
Sage Weil | 18a3819 | 2010-09-17 10:46:44 -0700 | [diff] [blame] | 1551 | if (inode->i_data.nrpages == 0 && |
Sage Weil | 5ecad6f | 2010-02-17 10:43:37 -0800 | [diff] [blame] | 1552 | invalidating_gen == ci->i_rdcache_gen) { |
| 1553 | /* success. */ |
| 1554 | dout("try_nonblocking_invalidate %p success\n", inode); |
Sage Weil | cd045cb | 2010-11-04 11:05:05 -0700 | [diff] [blame] | 1555 | /* save any racing async invalidate some trouble */ |
| 1556 | ci->i_rdcache_revoking = ci->i_rdcache_gen - 1; |
Sage Weil | 5ecad6f | 2010-02-17 10:43:37 -0800 | [diff] [blame] | 1557 | return 0; |
| 1558 | } |
| 1559 | dout("try_nonblocking_invalidate %p failed\n", inode); |
| 1560 | return -1; |
| 1561 | } |
| 1562 | |
| 1563 | /* |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1564 | * Swiss army knife function to examine currently used and wanted |
| 1565 | * versus held caps. Release, flush, ack revoked caps to mds as |
| 1566 | * appropriate. |
| 1567 | * |
| 1568 | * CHECK_CAPS_NODELAY - caller is delayed work and we should not delay |
| 1569 | * cap release further. |
| 1570 | * CHECK_CAPS_AUTHONLY - we should only check the auth cap |
| 1571 | * CHECK_CAPS_FLUSH - we should flush any dirty caps immediately, without |
| 1572 | * further delay. |
| 1573 | */ |
| 1574 | void ceph_check_caps(struct ceph_inode_info *ci, int flags, |
| 1575 | struct ceph_mds_session *session) |
| 1576 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1577 | struct ceph_fs_client *fsc = ceph_inode_to_client(&ci->vfs_inode); |
| 1578 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1579 | struct inode *inode = &ci->vfs_inode; |
| 1580 | struct ceph_cap *cap; |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1581 | u64 flush_tid, oldest_flush_tid; |
Yan, Zheng | 395c312 | 2013-01-04 14:37:57 +0800 | [diff] [blame] | 1582 | int file_wanted, used, cap_used; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1583 | int took_snap_rwsem = 0; /* true if mdsc->snap_rwsem held */ |
Sage Weil | cbd0363 | 2010-02-09 13:41:18 -0800 | [diff] [blame] | 1584 | int issued, implemented, want, retain, revoking, flushing = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1585 | int mds = -1; /* keep track of how far we've gone through i_caps list |
| 1586 | to avoid an infinite loop on retry */ |
| 1587 | struct rb_node *p; |
| 1588 | int tried_invalidate = 0; |
| 1589 | int delayed = 0, sent = 0, force_requeue = 0, num; |
Sage Weil | cbd0363 | 2010-02-09 13:41:18 -0800 | [diff] [blame] | 1590 | int queue_invalidate = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1591 | int is_delayed = flags & CHECK_CAPS_NODELAY; |
| 1592 | |
| 1593 | /* if we are unmounting, flush any unused caps immediately. */ |
| 1594 | if (mdsc->stopping) |
| 1595 | is_delayed = 1; |
| 1596 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1597 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1598 | |
| 1599 | if (ci->i_ceph_flags & CEPH_I_FLUSH) |
| 1600 | flags |= CHECK_CAPS_FLUSH; |
| 1601 | |
| 1602 | /* flush snaps first time around only */ |
| 1603 | if (!list_empty(&ci->i_cap_snaps)) |
Sage Weil | e835124 | 2010-09-17 08:03:08 -0700 | [diff] [blame] | 1604 | __ceph_flush_snaps(ci, &session, 0); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1605 | goto retry_locked; |
| 1606 | retry: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1607 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1608 | retry_locked: |
| 1609 | file_wanted = __ceph_caps_file_wanted(ci); |
| 1610 | used = __ceph_caps_used(ci); |
Sage Weil | cbd0363 | 2010-02-09 13:41:18 -0800 | [diff] [blame] | 1611 | issued = __ceph_caps_issued(ci, &implemented); |
| 1612 | revoking = implemented & ~issued; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1613 | |
Yan, Zheng | 4144599 | 2015-05-25 17:36:42 +0800 | [diff] [blame] | 1614 | want = file_wanted; |
| 1615 | retain = file_wanted | used | CEPH_CAP_PIN; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1616 | if (!mdsc->stopping && inode->i_nlink > 0) { |
Yan, Zheng | 4144599 | 2015-05-25 17:36:42 +0800 | [diff] [blame] | 1617 | if (file_wanted) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1618 | retain |= CEPH_CAP_ANY; /* be greedy */ |
Yan, Zheng | 32ec439 | 2015-03-26 19:06:00 +0800 | [diff] [blame] | 1619 | } else if (S_ISDIR(inode->i_mode) && |
| 1620 | (issued & CEPH_CAP_FILE_SHARED) && |
| 1621 | __ceph_dir_is_complete(ci)) { |
| 1622 | /* |
| 1623 | * If a directory is complete, we want to keep |
| 1624 | * the exclusive cap. So that MDS does not end up |
| 1625 | * revoking the shared cap on every create/unlink |
| 1626 | * operation. |
| 1627 | */ |
| 1628 | want = CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL; |
| 1629 | retain |= want; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1630 | } else { |
Yan, Zheng | 32ec439 | 2015-03-26 19:06:00 +0800 | [diff] [blame] | 1631 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1632 | retain |= CEPH_CAP_ANY_SHARED; |
| 1633 | /* |
| 1634 | * keep RD only if we didn't have the file open RW, |
| 1635 | * because then the mds would revoke it anyway to |
| 1636 | * journal max_size=0. |
| 1637 | */ |
| 1638 | if (ci->i_max_size == 0) |
| 1639 | retain |= CEPH_CAP_ANY_RD; |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | dout("check_caps %p file_want %s used %s dirty %s flushing %s" |
Sage Weil | cbd0363 | 2010-02-09 13:41:18 -0800 | [diff] [blame] | 1644 | " issued %s revoking %s retain %s %s%s%s\n", inode, |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1645 | ceph_cap_string(file_wanted), |
| 1646 | ceph_cap_string(used), ceph_cap_string(ci->i_dirty_caps), |
| 1647 | ceph_cap_string(ci->i_flushing_caps), |
Sage Weil | cbd0363 | 2010-02-09 13:41:18 -0800 | [diff] [blame] | 1648 | ceph_cap_string(issued), ceph_cap_string(revoking), |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1649 | ceph_cap_string(retain), |
| 1650 | (flags & CHECK_CAPS_AUTHONLY) ? " AUTHONLY" : "", |
| 1651 | (flags & CHECK_CAPS_NODELAY) ? " NODELAY" : "", |
| 1652 | (flags & CHECK_CAPS_FLUSH) ? " FLUSH" : ""); |
| 1653 | |
| 1654 | /* |
| 1655 | * If we no longer need to hold onto old our caps, and we may |
| 1656 | * have cached pages, but don't want them, then try to invalidate. |
| 1657 | * If we fail, it's because pages are locked.... try again later. |
| 1658 | */ |
| 1659 | if ((!is_delayed || mdsc->stopping) && |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 1660 | !S_ISDIR(inode->i_mode) && /* ignore readdir cache */ |
Yan, Zheng | 9abd4db | 2016-05-18 20:58:26 +0800 | [diff] [blame] | 1661 | !(ci->i_wb_ref || ci->i_wrbuffer_ref) && /* no dirty pages... */ |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 1662 | inode->i_data.nrpages && /* have cached pages */ |
Yan, Zheng | 5e804ac | 2015-10-26 16:08:43 +0800 | [diff] [blame] | 1663 | (revoking & (CEPH_CAP_FILE_CACHE| |
| 1664 | CEPH_CAP_FILE_LAZYIO)) && /* or revoking cache */ |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1665 | !tried_invalidate) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1666 | dout("check_caps trying to invalidate on %p\n", inode); |
Sage Weil | 5ecad6f | 2010-02-17 10:43:37 -0800 | [diff] [blame] | 1667 | if (try_nonblocking_invalidate(inode) < 0) { |
Sage Weil | 2962507 | 2010-05-27 10:40:43 -0700 | [diff] [blame] | 1668 | if (revoking & (CEPH_CAP_FILE_CACHE| |
| 1669 | CEPH_CAP_FILE_LAZYIO)) { |
Sage Weil | 5ecad6f | 2010-02-17 10:43:37 -0800 | [diff] [blame] | 1670 | dout("check_caps queuing invalidate\n"); |
| 1671 | queue_invalidate = 1; |
| 1672 | ci->i_rdcache_revoking = ci->i_rdcache_gen; |
| 1673 | } else { |
| 1674 | dout("check_caps failed to invalidate pages\n"); |
| 1675 | /* we failed to invalidate pages. check these |
| 1676 | caps again later. */ |
| 1677 | force_requeue = 1; |
| 1678 | __cap_set_timeouts(mdsc, ci); |
| 1679 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1680 | } |
| 1681 | tried_invalidate = 1; |
| 1682 | goto retry_locked; |
| 1683 | } |
| 1684 | |
| 1685 | num = 0; |
| 1686 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
| 1687 | cap = rb_entry(p, struct ceph_cap, ci_node); |
| 1688 | num++; |
| 1689 | |
| 1690 | /* avoid looping forever */ |
| 1691 | if (mds >= cap->mds || |
| 1692 | ((flags & CHECK_CAPS_AUTHONLY) && cap != ci->i_auth_cap)) |
| 1693 | continue; |
| 1694 | |
| 1695 | /* NOTE: no side-effects allowed, until we take s_mutex */ |
| 1696 | |
Yan, Zheng | 395c312 | 2013-01-04 14:37:57 +0800 | [diff] [blame] | 1697 | cap_used = used; |
| 1698 | if (ci->i_auth_cap && cap != ci->i_auth_cap) |
| 1699 | cap_used &= ~ci->i_auth_cap->issued; |
| 1700 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1701 | revoking = cap->implemented & ~cap->issued; |
Yan, Zheng | 395c312 | 2013-01-04 14:37:57 +0800 | [diff] [blame] | 1702 | dout(" mds%d cap %p used %s issued %s implemented %s revoking %s\n", |
Yan, Zheng | 9abd4db | 2016-05-18 20:58:26 +0800 | [diff] [blame] | 1703 | cap->mds, cap, ceph_cap_string(cap_used), |
| 1704 | ceph_cap_string(cap->issued), |
Sage Weil | 088b3f5 | 2011-01-18 08:56:01 -0800 | [diff] [blame] | 1705 | ceph_cap_string(cap->implemented), |
| 1706 | ceph_cap_string(revoking)); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1707 | |
| 1708 | if (cap == ci->i_auth_cap && |
| 1709 | (cap->issued & CEPH_CAP_FILE_WR)) { |
| 1710 | /* request larger max_size from MDS? */ |
| 1711 | if (ci->i_wanted_max_size > ci->i_max_size && |
| 1712 | ci->i_wanted_max_size > ci->i_requested_max_size) { |
| 1713 | dout("requesting new max_size\n"); |
| 1714 | goto ack; |
| 1715 | } |
| 1716 | |
| 1717 | /* approaching file_max? */ |
| 1718 | if ((inode->i_size << 1) >= ci->i_max_size && |
| 1719 | (ci->i_reported_size << 1) < ci->i_max_size) { |
| 1720 | dout("i_size approaching max_size\n"); |
| 1721 | goto ack; |
| 1722 | } |
| 1723 | } |
| 1724 | /* flush anything dirty? */ |
| 1725 | if (cap == ci->i_auth_cap && (flags & CHECK_CAPS_FLUSH) && |
| 1726 | ci->i_dirty_caps) { |
| 1727 | dout("flushing dirty caps\n"); |
| 1728 | goto ack; |
| 1729 | } |
| 1730 | |
| 1731 | /* completed revocation? going down and there are no caps? */ |
Yan, Zheng | 395c312 | 2013-01-04 14:37:57 +0800 | [diff] [blame] | 1732 | if (revoking && (revoking & cap_used) == 0) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1733 | dout("completed revocation of %s\n", |
| 1734 | ceph_cap_string(cap->implemented & ~cap->issued)); |
| 1735 | goto ack; |
| 1736 | } |
| 1737 | |
| 1738 | /* want more caps from mds? */ |
| 1739 | if (want & ~(cap->mds_wanted | cap->issued)) |
| 1740 | goto ack; |
| 1741 | |
| 1742 | /* things we might delay */ |
| 1743 | if ((cap->issued & ~retain) == 0 && |
| 1744 | cap->mds_wanted == want) |
| 1745 | continue; /* nope, all good */ |
| 1746 | |
| 1747 | if (is_delayed) |
| 1748 | goto ack; |
| 1749 | |
| 1750 | /* delay? */ |
| 1751 | if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0 && |
| 1752 | time_before(jiffies, ci->i_hold_caps_max)) { |
| 1753 | dout(" delaying issued %s -> %s, wanted %s -> %s\n", |
| 1754 | ceph_cap_string(cap->issued), |
| 1755 | ceph_cap_string(cap->issued & retain), |
| 1756 | ceph_cap_string(cap->mds_wanted), |
| 1757 | ceph_cap_string(want)); |
| 1758 | delayed++; |
| 1759 | continue; |
| 1760 | } |
| 1761 | |
| 1762 | ack: |
Sage Weil | e9964c1 | 2010-03-01 15:16:56 -0800 | [diff] [blame] | 1763 | if (ci->i_ceph_flags & CEPH_I_NOFLUSH) { |
| 1764 | dout(" skipping %p I_NOFLUSH set\n", inode); |
| 1765 | continue; |
| 1766 | } |
| 1767 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1768 | if (session && session != cap->session) { |
| 1769 | dout("oops, wrong session %p mutex\n", session); |
| 1770 | mutex_unlock(&session->s_mutex); |
| 1771 | session = NULL; |
| 1772 | } |
| 1773 | if (!session) { |
| 1774 | session = cap->session; |
| 1775 | if (mutex_trylock(&session->s_mutex) == 0) { |
| 1776 | dout("inverting session/ino locks on %p\n", |
| 1777 | session); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1778 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1779 | if (took_snap_rwsem) { |
| 1780 | up_read(&mdsc->snap_rwsem); |
| 1781 | took_snap_rwsem = 0; |
| 1782 | } |
| 1783 | mutex_lock(&session->s_mutex); |
| 1784 | goto retry; |
| 1785 | } |
| 1786 | } |
| 1787 | /* take snap_rwsem after session mutex */ |
| 1788 | if (!took_snap_rwsem) { |
| 1789 | if (down_read_trylock(&mdsc->snap_rwsem) == 0) { |
| 1790 | dout("inverting snap/in locks on %p\n", |
| 1791 | inode); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1792 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1793 | down_read(&mdsc->snap_rwsem); |
| 1794 | took_snap_rwsem = 1; |
| 1795 | goto retry; |
| 1796 | } |
| 1797 | took_snap_rwsem = 1; |
| 1798 | } |
| 1799 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1800 | if (cap == ci->i_auth_cap && ci->i_dirty_caps) { |
| 1801 | flushing = __mark_caps_flushing(inode, session, |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1802 | &flush_tid, |
| 1803 | &oldest_flush_tid); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1804 | } else { |
Sage Weil | 24be0c4 | 2011-01-18 08:48:06 -0800 | [diff] [blame] | 1805 | flushing = 0; |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1806 | flush_tid = 0; |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1807 | spin_lock(&mdsc->cap_dirty_lock); |
| 1808 | oldest_flush_tid = __get_oldest_flush_tid(mdsc); |
| 1809 | spin_unlock(&mdsc->cap_dirty_lock); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1810 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1811 | |
| 1812 | mds = cap->mds; /* remember mds, so we don't repeat */ |
| 1813 | sent++; |
| 1814 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1815 | /* __send_cap drops i_ceph_lock */ |
Yan, Zheng | 395c312 | 2013-01-04 14:37:57 +0800 | [diff] [blame] | 1816 | delayed += __send_cap(mdsc, cap, CEPH_CAP_OP_UPDATE, cap_used, |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1817 | want, retain, flushing, |
| 1818 | flush_tid, oldest_flush_tid); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1819 | goto retry; /* retake i_ceph_lock and restart our cap scan. */ |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1820 | } |
| 1821 | |
| 1822 | /* |
| 1823 | * Reschedule delayed caps release if we delayed anything, |
| 1824 | * otherwise cancel. |
| 1825 | */ |
| 1826 | if (delayed && is_delayed) |
| 1827 | force_requeue = 1; /* __send_cap delayed release; requeue */ |
| 1828 | if (!delayed && !is_delayed) |
| 1829 | __cap_delay_cancel(mdsc, ci); |
| 1830 | else if (!is_delayed || force_requeue) |
| 1831 | __cap_delay_requeue(mdsc, ci); |
| 1832 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1833 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1834 | |
Sage Weil | cbd0363 | 2010-02-09 13:41:18 -0800 | [diff] [blame] | 1835 | if (queue_invalidate) |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1836 | ceph_queue_invalidate(inode); |
Sage Weil | cbd0363 | 2010-02-09 13:41:18 -0800 | [diff] [blame] | 1837 | |
Sage Weil | cdc2ce0 | 2010-03-16 13:39:28 -0700 | [diff] [blame] | 1838 | if (session) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1839 | mutex_unlock(&session->s_mutex); |
| 1840 | if (took_snap_rwsem) |
| 1841 | up_read(&mdsc->snap_rwsem); |
| 1842 | } |
| 1843 | |
| 1844 | /* |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1845 | * Try to flush dirty caps back to the auth mds. |
| 1846 | */ |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1847 | static int try_flush_caps(struct inode *inode, u64 *ptid) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1848 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1849 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1850 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yan, Zheng | 4fe5978 | 2013-10-31 16:44:14 +0800 | [diff] [blame] | 1851 | struct ceph_mds_session *session = NULL; |
Yan, Zheng | 89b52fe | 2015-05-27 09:59:48 +0800 | [diff] [blame] | 1852 | int flushing = 0; |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1853 | u64 flush_tid = 0, oldest_flush_tid = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1854 | |
| 1855 | retry: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1856 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | e9964c1 | 2010-03-01 15:16:56 -0800 | [diff] [blame] | 1857 | if (ci->i_ceph_flags & CEPH_I_NOFLUSH) { |
| 1858 | dout("try_flush_caps skipping %p I_NOFLUSH set\n", inode); |
| 1859 | goto out; |
| 1860 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1861 | if (ci->i_dirty_caps && ci->i_auth_cap) { |
| 1862 | struct ceph_cap *cap = ci->i_auth_cap; |
| 1863 | int used = __ceph_caps_used(ci); |
| 1864 | int want = __ceph_caps_wanted(ci); |
| 1865 | int delayed; |
| 1866 | |
Yan, Zheng | 4fe5978 | 2013-10-31 16:44:14 +0800 | [diff] [blame] | 1867 | if (!session || session != cap->session) { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1868 | spin_unlock(&ci->i_ceph_lock); |
Yan, Zheng | 4fe5978 | 2013-10-31 16:44:14 +0800 | [diff] [blame] | 1869 | if (session) |
| 1870 | mutex_unlock(&session->s_mutex); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1871 | session = cap->session; |
| 1872 | mutex_lock(&session->s_mutex); |
| 1873 | goto retry; |
| 1874 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1875 | if (cap->session->s_state < CEPH_MDS_SESSION_OPEN) |
| 1876 | goto out; |
| 1877 | |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1878 | flushing = __mark_caps_flushing(inode, session, &flush_tid, |
| 1879 | &oldest_flush_tid); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1880 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1881 | /* __send_cap drops i_ceph_lock */ |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1882 | delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, used, want, |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1883 | (cap->issued | cap->implemented), |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 1884 | flushing, flush_tid, oldest_flush_tid); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1885 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1886 | if (delayed) { |
| 1887 | spin_lock(&ci->i_ceph_lock); |
Yan, Zheng | 89b52fe | 2015-05-27 09:59:48 +0800 | [diff] [blame] | 1888 | __cap_delay_requeue(mdsc, ci); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1889 | spin_unlock(&ci->i_ceph_lock); |
| 1890 | } |
| 1891 | } else { |
| 1892 | struct rb_node *n = rb_last(&ci->i_cap_flush_tree); |
| 1893 | if (n) { |
| 1894 | struct ceph_cap_flush *cf = |
| 1895 | rb_entry(n, struct ceph_cap_flush, i_node); |
| 1896 | flush_tid = cf->tid; |
| 1897 | } |
| 1898 | flushing = ci->i_flushing_caps; |
| 1899 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1900 | } |
| 1901 | out: |
Yan, Zheng | 4fe5978 | 2013-10-31 16:44:14 +0800 | [diff] [blame] | 1902 | if (session) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1903 | mutex_unlock(&session->s_mutex); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1904 | |
| 1905 | *ptid = flush_tid; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1906 | return flushing; |
| 1907 | } |
| 1908 | |
| 1909 | /* |
| 1910 | * Return true if we've flushed caps through the given flush_tid. |
| 1911 | */ |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1912 | static int caps_are_flushed(struct inode *inode, u64 flush_tid) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1913 | { |
| 1914 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1915 | struct ceph_cap_flush *cf; |
| 1916 | struct rb_node *n; |
| 1917 | int ret = 1; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1918 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1919 | spin_lock(&ci->i_ceph_lock); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1920 | n = rb_first(&ci->i_cap_flush_tree); |
| 1921 | if (n) { |
| 1922 | cf = rb_entry(n, struct ceph_cap_flush, i_node); |
| 1923 | if (cf->tid <= flush_tid) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1924 | ret = 0; |
Yan, Zheng | 89b52fe | 2015-05-27 09:59:48 +0800 | [diff] [blame] | 1925 | } |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1926 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1927 | return ret; |
| 1928 | } |
| 1929 | |
| 1930 | /* |
Yan, Zheng | 68cd5b4 | 2015-10-27 18:36:06 +0800 | [diff] [blame] | 1931 | * wait for any unsafe requests to complete. |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 1932 | */ |
Yan, Zheng | 68cd5b4 | 2015-10-27 18:36:06 +0800 | [diff] [blame] | 1933 | static int unsafe_request_wait(struct inode *inode) |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 1934 | { |
| 1935 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yan, Zheng | 68cd5b4 | 2015-10-27 18:36:06 +0800 | [diff] [blame] | 1936 | struct ceph_mds_request *req1 = NULL, *req2 = NULL; |
| 1937 | int ret, err = 0; |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 1938 | |
| 1939 | spin_lock(&ci->i_unsafe_lock); |
Yan, Zheng | 68cd5b4 | 2015-10-27 18:36:06 +0800 | [diff] [blame] | 1940 | if (S_ISDIR(inode->i_mode) && !list_empty(&ci->i_unsafe_dirops)) { |
| 1941 | req1 = list_last_entry(&ci->i_unsafe_dirops, |
| 1942 | struct ceph_mds_request, |
| 1943 | r_unsafe_dir_item); |
| 1944 | ceph_mdsc_get_request(req1); |
| 1945 | } |
| 1946 | if (!list_empty(&ci->i_unsafe_iops)) { |
| 1947 | req2 = list_last_entry(&ci->i_unsafe_iops, |
| 1948 | struct ceph_mds_request, |
| 1949 | r_unsafe_target_item); |
| 1950 | ceph_mdsc_get_request(req2); |
| 1951 | } |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 1952 | spin_unlock(&ci->i_unsafe_lock); |
Yan, Zheng | 68cd5b4 | 2015-10-27 18:36:06 +0800 | [diff] [blame] | 1953 | |
| 1954 | dout("unsafe_requeset_wait %p wait on tid %llu %llu\n", |
| 1955 | inode, req1 ? req1->r_tid : 0ULL, req2 ? req2->r_tid : 0ULL); |
| 1956 | if (req1) { |
| 1957 | ret = !wait_for_completion_timeout(&req1->r_safe_completion, |
| 1958 | ceph_timeout_jiffies(req1->r_timeout)); |
| 1959 | if (ret) |
| 1960 | err = -EIO; |
| 1961 | ceph_mdsc_put_request(req1); |
| 1962 | } |
| 1963 | if (req2) { |
| 1964 | ret = !wait_for_completion_timeout(&req2->r_safe_completion, |
| 1965 | ceph_timeout_jiffies(req2->r_timeout)); |
| 1966 | if (ret) |
| 1967 | err = -EIO; |
| 1968 | ceph_mdsc_put_request(req2); |
| 1969 | } |
| 1970 | return err; |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 1971 | } |
| 1972 | |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 1973 | int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1974 | { |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 1975 | struct inode *inode = file->f_mapping->host; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1976 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1977 | u64 flush_tid; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1978 | int ret; |
| 1979 | int dirty; |
| 1980 | |
| 1981 | dout("fsync %p%s\n", inode, datasync ? " datasync" : ""); |
Yan, Zheng | 9a5530c | 2016-06-15 16:29:18 +0800 | [diff] [blame^] | 1982 | |
| 1983 | ceph_sync_write_wait(inode); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1984 | |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 1985 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1986 | if (ret < 0) |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 1987 | goto out; |
| 1988 | |
| 1989 | if (datasync) |
| 1990 | goto out; |
| 1991 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 1992 | inode_lock(inode); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1993 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 1994 | dirty = try_flush_caps(inode, &flush_tid); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1995 | dout("fsync dirty caps are %s\n", ceph_cap_string(dirty)); |
| 1996 | |
Yan, Zheng | 68cd5b4 | 2015-10-27 18:36:06 +0800 | [diff] [blame] | 1997 | ret = unsafe_request_wait(inode); |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 1998 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 1999 | /* |
| 2000 | * only wait on non-file metadata writeback (the mds |
| 2001 | * can recover size and mtime, so we don't need to |
| 2002 | * wait for that) |
| 2003 | */ |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 2004 | if (!ret && (dirty & ~CEPH_CAP_ANY_FILE_WR)) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2005 | ret = wait_event_interruptible(ci->i_cap_wq, |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 2006 | caps_are_flushed(inode, flush_tid)); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2007 | } |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 2008 | inode_unlock(inode); |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 2009 | out: |
| 2010 | dout("fsync %p%s result=%d\n", inode, datasync ? " datasync" : "", ret); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2011 | return ret; |
| 2012 | } |
| 2013 | |
| 2014 | /* |
| 2015 | * Flush any dirty caps back to the mds. If we aren't asked to wait, |
| 2016 | * queue inode for flush but don't do so immediately, because we can |
| 2017 | * get by with fewer MDS messages if we wait for data writeback to |
| 2018 | * complete first. |
| 2019 | */ |
Stephen Rothwell | f1a3d57 | 2010-01-18 11:53:08 +1100 | [diff] [blame] | 2020 | int ceph_write_inode(struct inode *inode, struct writeback_control *wbc) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2021 | { |
| 2022 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2023 | u64 flush_tid; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2024 | int err = 0; |
| 2025 | int dirty; |
Stephen Rothwell | f1a3d57 | 2010-01-18 11:53:08 +1100 | [diff] [blame] | 2026 | int wait = wbc->sync_mode == WB_SYNC_ALL; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2027 | |
| 2028 | dout("write_inode %p wait=%d\n", inode, wait); |
| 2029 | if (wait) { |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2030 | dirty = try_flush_caps(inode, &flush_tid); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2031 | if (dirty) |
| 2032 | err = wait_event_interruptible(ci->i_cap_wq, |
| 2033 | caps_are_flushed(inode, flush_tid)); |
| 2034 | } else { |
Cheng Renquan | 640ef79 | 2010-03-26 17:40:33 +0800 | [diff] [blame] | 2035 | struct ceph_mds_client *mdsc = |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2036 | ceph_sb_to_client(inode->i_sb)->mdsc; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2037 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2038 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2039 | if (__ceph_caps_dirty(ci)) |
| 2040 | __cap_delay_requeue_front(mdsc, ci); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2041 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2042 | } |
| 2043 | return err; |
| 2044 | } |
| 2045 | |
| 2046 | /* |
| 2047 | * After a recovering MDS goes active, we need to resend any caps |
| 2048 | * we were flushing. |
| 2049 | * |
| 2050 | * Caller holds session->s_mutex. |
| 2051 | */ |
| 2052 | static void kick_flushing_capsnaps(struct ceph_mds_client *mdsc, |
| 2053 | struct ceph_mds_session *session) |
| 2054 | { |
| 2055 | struct ceph_cap_snap *capsnap; |
| 2056 | |
| 2057 | dout("kick_flushing_capsnaps mds%d\n", session->s_mds); |
| 2058 | list_for_each_entry(capsnap, &session->s_cap_snaps_flushing, |
| 2059 | flushing_item) { |
| 2060 | struct ceph_inode_info *ci = capsnap->ci; |
| 2061 | struct inode *inode = &ci->vfs_inode; |
| 2062 | struct ceph_cap *cap; |
| 2063 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2064 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2065 | cap = ci->i_auth_cap; |
| 2066 | if (cap && cap->session == session) { |
| 2067 | dout("kick_flushing_caps %p cap %p capsnap %p\n", inode, |
| 2068 | cap, capsnap); |
Sage Weil | e835124 | 2010-09-17 08:03:08 -0700 | [diff] [blame] | 2069 | __ceph_flush_snaps(ci, &session, 1); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2070 | } else { |
| 2071 | pr_err("%p auth cap %p not mds%d ???\n", inode, |
| 2072 | cap, session->s_mds); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2073 | } |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2074 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2075 | } |
| 2076 | } |
| 2077 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2078 | static int __kick_flushing_caps(struct ceph_mds_client *mdsc, |
| 2079 | struct ceph_mds_session *session, |
Yan, Zheng | fc927cd | 2015-07-20 09:50:58 +0800 | [diff] [blame] | 2080 | struct ceph_inode_info *ci) |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2081 | { |
| 2082 | struct inode *inode = &ci->vfs_inode; |
| 2083 | struct ceph_cap *cap; |
| 2084 | struct ceph_cap_flush *cf; |
| 2085 | struct rb_node *n; |
| 2086 | int delayed = 0; |
| 2087 | u64 first_tid = 0; |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 2088 | u64 oldest_flush_tid; |
| 2089 | |
| 2090 | spin_lock(&mdsc->cap_dirty_lock); |
| 2091 | oldest_flush_tid = __get_oldest_flush_tid(mdsc); |
| 2092 | spin_unlock(&mdsc->cap_dirty_lock); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2093 | |
| 2094 | while (true) { |
| 2095 | spin_lock(&ci->i_ceph_lock); |
| 2096 | cap = ci->i_auth_cap; |
| 2097 | if (!(cap && cap->session == session)) { |
| 2098 | pr_err("%p auth cap %p not mds%d ???\n", inode, |
| 2099 | cap, session->s_mds); |
| 2100 | spin_unlock(&ci->i_ceph_lock); |
| 2101 | break; |
| 2102 | } |
| 2103 | |
| 2104 | for (n = rb_first(&ci->i_cap_flush_tree); n; n = rb_next(n)) { |
| 2105 | cf = rb_entry(n, struct ceph_cap_flush, i_node); |
Yan, Zheng | fc927cd | 2015-07-20 09:50:58 +0800 | [diff] [blame] | 2106 | if (cf->tid >= first_tid) |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2107 | break; |
| 2108 | } |
| 2109 | if (!n) { |
| 2110 | spin_unlock(&ci->i_ceph_lock); |
| 2111 | break; |
| 2112 | } |
| 2113 | |
| 2114 | cf = rb_entry(n, struct ceph_cap_flush, i_node); |
Yan, Zheng | e548e9b | 2015-06-10 15:17:56 +0800 | [diff] [blame] | 2115 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2116 | first_tid = cf->tid + 1; |
| 2117 | |
| 2118 | dout("kick_flushing_caps %p cap %p tid %llu %s\n", inode, |
| 2119 | cap, cf->tid, ceph_cap_string(cf->caps)); |
| 2120 | delayed |= __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, |
| 2121 | __ceph_caps_used(ci), |
| 2122 | __ceph_caps_wanted(ci), |
| 2123 | cap->issued | cap->implemented, |
Yan, Zheng | a2971c8 | 2015-06-10 11:09:32 +0800 | [diff] [blame] | 2124 | cf->caps, cf->tid, oldest_flush_tid); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2125 | } |
| 2126 | return delayed; |
| 2127 | } |
| 2128 | |
Yan, Zheng | e548e9b | 2015-06-10 15:17:56 +0800 | [diff] [blame] | 2129 | void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, |
| 2130 | struct ceph_mds_session *session) |
| 2131 | { |
| 2132 | struct ceph_inode_info *ci; |
| 2133 | struct ceph_cap *cap; |
Yan, Zheng | e548e9b | 2015-06-10 15:17:56 +0800 | [diff] [blame] | 2134 | |
| 2135 | dout("early_kick_flushing_caps mds%d\n", session->s_mds); |
| 2136 | list_for_each_entry(ci, &session->s_cap_flushing, i_flushing_item) { |
| 2137 | spin_lock(&ci->i_ceph_lock); |
| 2138 | cap = ci->i_auth_cap; |
| 2139 | if (!(cap && cap->session == session)) { |
| 2140 | pr_err("%p auth cap %p not mds%d ???\n", |
| 2141 | &ci->vfs_inode, cap, session->s_mds); |
| 2142 | spin_unlock(&ci->i_ceph_lock); |
| 2143 | continue; |
| 2144 | } |
| 2145 | |
| 2146 | |
| 2147 | /* |
| 2148 | * if flushing caps were revoked, we re-send the cap flush |
| 2149 | * in client reconnect stage. This guarantees MDS * processes |
| 2150 | * the cap flush message before issuing the flushing caps to |
| 2151 | * other client. |
| 2152 | */ |
| 2153 | if ((cap->issued & ci->i_flushing_caps) != |
| 2154 | ci->i_flushing_caps) { |
| 2155 | spin_unlock(&ci->i_ceph_lock); |
Yan, Zheng | fc927cd | 2015-07-20 09:50:58 +0800 | [diff] [blame] | 2156 | if (!__kick_flushing_caps(mdsc, session, ci)) |
Yan, Zheng | e548e9b | 2015-06-10 15:17:56 +0800 | [diff] [blame] | 2157 | continue; |
| 2158 | spin_lock(&ci->i_ceph_lock); |
| 2159 | } |
| 2160 | |
Yan, Zheng | e548e9b | 2015-06-10 15:17:56 +0800 | [diff] [blame] | 2161 | spin_unlock(&ci->i_ceph_lock); |
| 2162 | } |
| 2163 | } |
| 2164 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2165 | void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, |
| 2166 | struct ceph_mds_session *session) |
| 2167 | { |
| 2168 | struct ceph_inode_info *ci; |
| 2169 | |
| 2170 | kick_flushing_capsnaps(mdsc, session); |
| 2171 | |
| 2172 | dout("kick_flushing_caps mds%d\n", session->s_mds); |
| 2173 | list_for_each_entry(ci, &session->s_cap_flushing, i_flushing_item) { |
Yan, Zheng | fc927cd | 2015-07-20 09:50:58 +0800 | [diff] [blame] | 2174 | int delayed = __kick_flushing_caps(mdsc, session, ci); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2175 | if (delayed) { |
| 2176 | spin_lock(&ci->i_ceph_lock); |
| 2177 | __cap_delay_requeue(mdsc, ci); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2178 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2179 | } |
| 2180 | } |
| 2181 | } |
| 2182 | |
Sage Weil | 088b3f5 | 2011-01-18 08:56:01 -0800 | [diff] [blame] | 2183 | static void kick_flushing_inode_caps(struct ceph_mds_client *mdsc, |
| 2184 | struct ceph_mds_session *session, |
| 2185 | struct inode *inode) |
| 2186 | { |
| 2187 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 2188 | struct ceph_cap *cap; |
Sage Weil | 088b3f5 | 2011-01-18 08:56:01 -0800 | [diff] [blame] | 2189 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2190 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 088b3f5 | 2011-01-18 08:56:01 -0800 | [diff] [blame] | 2191 | cap = ci->i_auth_cap; |
Yan, Zheng | 8310b08 | 2015-06-09 17:20:12 +0800 | [diff] [blame] | 2192 | dout("kick_flushing_inode_caps %p flushing %s\n", inode, |
| 2193 | ceph_cap_string(ci->i_flushing_caps)); |
Yan, Zheng | 005c469 | 2013-05-31 16:40:24 +0800 | [diff] [blame] | 2194 | |
Sage Weil | 088b3f5 | 2011-01-18 08:56:01 -0800 | [diff] [blame] | 2195 | __ceph_flush_snaps(ci, &session, 1); |
Yan, Zheng | 005c469 | 2013-05-31 16:40:24 +0800 | [diff] [blame] | 2196 | |
Sage Weil | 088b3f5 | 2011-01-18 08:56:01 -0800 | [diff] [blame] | 2197 | if (ci->i_flushing_caps) { |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2198 | int delayed; |
| 2199 | |
Yan, Zheng | 005c469 | 2013-05-31 16:40:24 +0800 | [diff] [blame] | 2200 | spin_lock(&mdsc->cap_dirty_lock); |
| 2201 | list_move_tail(&ci->i_flushing_item, |
| 2202 | &cap->session->s_cap_flushing); |
| 2203 | spin_unlock(&mdsc->cap_dirty_lock); |
| 2204 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2205 | spin_unlock(&ci->i_ceph_lock); |
| 2206 | |
Yan, Zheng | fc927cd | 2015-07-20 09:50:58 +0800 | [diff] [blame] | 2207 | delayed = __kick_flushing_caps(mdsc, session, ci); |
Sage Weil | 088b3f5 | 2011-01-18 08:56:01 -0800 | [diff] [blame] | 2208 | if (delayed) { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2209 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 088b3f5 | 2011-01-18 08:56:01 -0800 | [diff] [blame] | 2210 | __cap_delay_requeue(mdsc, ci); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2211 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 088b3f5 | 2011-01-18 08:56:01 -0800 | [diff] [blame] | 2212 | } |
| 2213 | } else { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2214 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 088b3f5 | 2011-01-18 08:56:01 -0800 | [diff] [blame] | 2215 | } |
| 2216 | } |
| 2217 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2218 | |
| 2219 | /* |
| 2220 | * Take references to capabilities we hold, so that we don't release |
| 2221 | * them to the MDS prematurely. |
| 2222 | * |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2223 | * Protected by i_ceph_lock. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2224 | */ |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2225 | static void __take_cap_refs(struct ceph_inode_info *ci, int got, |
| 2226 | bool snap_rwsem_locked) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2227 | { |
| 2228 | if (got & CEPH_CAP_PIN) |
| 2229 | ci->i_pin_ref++; |
| 2230 | if (got & CEPH_CAP_FILE_RD) |
| 2231 | ci->i_rd_ref++; |
| 2232 | if (got & CEPH_CAP_FILE_CACHE) |
| 2233 | ci->i_rdcache_ref++; |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2234 | if (got & CEPH_CAP_FILE_WR) { |
| 2235 | if (ci->i_wr_ref == 0 && !ci->i_head_snapc) { |
| 2236 | BUG_ON(!snap_rwsem_locked); |
| 2237 | ci->i_head_snapc = ceph_get_snap_context( |
| 2238 | ci->i_snap_realm->cached_context); |
| 2239 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2240 | ci->i_wr_ref++; |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2241 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2242 | if (got & CEPH_CAP_FILE_BUFFER) { |
Henry C Chang | d3d0720 | 2011-05-11 10:29:54 +0000 | [diff] [blame] | 2243 | if (ci->i_wb_ref == 0) |
Sage Weil | 3772d26 | 2011-05-03 09:28:08 -0700 | [diff] [blame] | 2244 | ihold(&ci->vfs_inode); |
Henry C Chang | d3d0720 | 2011-05-11 10:29:54 +0000 | [diff] [blame] | 2245 | ci->i_wb_ref++; |
| 2246 | dout("__take_cap_refs %p wb %d -> %d (?)\n", |
| 2247 | &ci->vfs_inode, ci->i_wb_ref-1, ci->i_wb_ref); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2248 | } |
| 2249 | } |
| 2250 | |
| 2251 | /* |
| 2252 | * Try to grab cap references. Specify those refs we @want, and the |
| 2253 | * minimal set we @need. Also include the larger offset we are writing |
| 2254 | * to (when applicable), and check against max_size here as well. |
| 2255 | * Note that caller is responsible for ensuring max_size increases are |
| 2256 | * requested from the MDS. |
| 2257 | */ |
| 2258 | static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want, |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2259 | loff_t endoff, bool nonblock, int *got, int *err) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2260 | { |
| 2261 | struct inode *inode = &ci->vfs_inode; |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2262 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2263 | int ret = 0; |
Yan, Zheng | c4d4a58 | 2015-01-09 15:56:18 +0800 | [diff] [blame] | 2264 | int have, implemented; |
Sage Weil | 195d3ce | 2010-03-01 09:57:54 -0800 | [diff] [blame] | 2265 | int file_wanted; |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2266 | bool snap_rwsem_locked = false; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2267 | |
| 2268 | dout("get_cap_refs %p need %s want %s\n", inode, |
| 2269 | ceph_cap_string(need), ceph_cap_string(want)); |
Yan, Zheng | c4d4a58 | 2015-01-09 15:56:18 +0800 | [diff] [blame] | 2270 | |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2271 | again: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2272 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2273 | |
Sage Weil | 195d3ce | 2010-03-01 09:57:54 -0800 | [diff] [blame] | 2274 | /* make sure file is actually open */ |
| 2275 | file_wanted = __ceph_caps_file_wanted(ci); |
Yan, Zheng | 7731032 | 2016-04-08 15:27:16 +0800 | [diff] [blame] | 2276 | if ((file_wanted & need) != need) { |
Sage Weil | 195d3ce | 2010-03-01 09:57:54 -0800 | [diff] [blame] | 2277 | dout("try_get_cap_refs need %s file_wanted %s, EBADF\n", |
| 2278 | ceph_cap_string(need), ceph_cap_string(file_wanted)); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2279 | *err = -EBADF; |
| 2280 | ret = 1; |
Yan, Zheng | 3738daa | 2014-11-14 22:10:07 +0800 | [diff] [blame] | 2281 | goto out_unlock; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2282 | } |
| 2283 | |
Yan, Zheng | 37505d5 | 2013-04-12 16:11:10 +0800 | [diff] [blame] | 2284 | /* finish pending truncate */ |
| 2285 | while (ci->i_truncate_pending) { |
| 2286 | spin_unlock(&ci->i_ceph_lock); |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2287 | if (snap_rwsem_locked) { |
| 2288 | up_read(&mdsc->snap_rwsem); |
| 2289 | snap_rwsem_locked = false; |
| 2290 | } |
Yan, Zheng | b415bf4 | 2013-07-02 12:40:19 +0800 | [diff] [blame] | 2291 | __ceph_do_pending_vmtruncate(inode); |
Yan, Zheng | 37505d5 | 2013-04-12 16:11:10 +0800 | [diff] [blame] | 2292 | spin_lock(&ci->i_ceph_lock); |
| 2293 | } |
| 2294 | |
Yan, Zheng | 3871cbb | 2013-08-05 14:10:29 +0800 | [diff] [blame] | 2295 | have = __ceph_caps_issued(ci, &implemented); |
| 2296 | |
| 2297 | if (have & need & CEPH_CAP_FILE_WR) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2298 | if (endoff >= 0 && endoff > (loff_t)ci->i_max_size) { |
| 2299 | dout("get_cap_refs %p endoff %llu > maxsize %llu\n", |
| 2300 | inode, endoff, ci->i_max_size); |
Yan, Zheng | 3871cbb | 2013-08-05 14:10:29 +0800 | [diff] [blame] | 2301 | if (endoff > ci->i_requested_max_size) { |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2302 | *err = -EAGAIN; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2303 | ret = 1; |
| 2304 | } |
Yan, Zheng | 3738daa | 2014-11-14 22:10:07 +0800 | [diff] [blame] | 2305 | goto out_unlock; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2306 | } |
| 2307 | /* |
| 2308 | * If a sync write is in progress, we must wait, so that we |
| 2309 | * can get a final snapshot value for size+mtime. |
| 2310 | */ |
| 2311 | if (__ceph_have_pending_cap_snap(ci)) { |
| 2312 | dout("get_cap_refs %p cap_snap_pending\n", inode); |
Yan, Zheng | 3738daa | 2014-11-14 22:10:07 +0800 | [diff] [blame] | 2313 | goto out_unlock; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2314 | } |
| 2315 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2316 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2317 | if ((have & need) == need) { |
| 2318 | /* |
| 2319 | * Look at (implemented & ~have & not) so that we keep waiting |
| 2320 | * on transition from wanted -> needed caps. This is needed |
| 2321 | * for WRBUFFER|WR -> WR to avoid a new WR sync write from |
| 2322 | * going before a prior buffered writeback happens. |
| 2323 | */ |
| 2324 | int not = want & ~(have & need); |
| 2325 | int revoking = implemented & ~have; |
| 2326 | dout("get_cap_refs %p have %s but not %s (revoking %s)\n", |
| 2327 | inode, ceph_cap_string(have), ceph_cap_string(not), |
| 2328 | ceph_cap_string(revoking)); |
| 2329 | if ((revoking & not) == 0) { |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2330 | if (!snap_rwsem_locked && |
| 2331 | !ci->i_head_snapc && |
| 2332 | (need & CEPH_CAP_FILE_WR)) { |
| 2333 | if (!down_read_trylock(&mdsc->snap_rwsem)) { |
| 2334 | /* |
| 2335 | * we can not call down_read() when |
| 2336 | * task isn't in TASK_RUNNING state |
| 2337 | */ |
| 2338 | if (nonblock) { |
| 2339 | *err = -EAGAIN; |
| 2340 | ret = 1; |
| 2341 | goto out_unlock; |
| 2342 | } |
| 2343 | |
| 2344 | spin_unlock(&ci->i_ceph_lock); |
| 2345 | down_read(&mdsc->snap_rwsem); |
| 2346 | snap_rwsem_locked = true; |
| 2347 | goto again; |
| 2348 | } |
| 2349 | snap_rwsem_locked = true; |
| 2350 | } |
Yan, Zheng | c4d4a58 | 2015-01-09 15:56:18 +0800 | [diff] [blame] | 2351 | *got = need | (have & want); |
Yan, Zheng | f7f7e7a | 2016-05-18 20:31:55 +0800 | [diff] [blame] | 2352 | if ((need & CEPH_CAP_FILE_RD) && |
| 2353 | !(*got & CEPH_CAP_FILE_CACHE)) |
| 2354 | ceph_disable_fscache_readpage(ci); |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2355 | __take_cap_refs(ci, *got, true); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2356 | ret = 1; |
| 2357 | } |
| 2358 | } else { |
Yan, Zheng | 03f4fcb | 2015-01-05 11:04:04 +0800 | [diff] [blame] | 2359 | int session_readonly = false; |
| 2360 | if ((need & CEPH_CAP_FILE_WR) && ci->i_auth_cap) { |
| 2361 | struct ceph_mds_session *s = ci->i_auth_cap->session; |
| 2362 | spin_lock(&s->s_cap_lock); |
| 2363 | session_readonly = s->s_readonly; |
| 2364 | spin_unlock(&s->s_cap_lock); |
| 2365 | } |
| 2366 | if (session_readonly) { |
| 2367 | dout("get_cap_refs %p needed %s but mds%d readonly\n", |
| 2368 | inode, ceph_cap_string(need), ci->i_auth_cap->mds); |
| 2369 | *err = -EROFS; |
| 2370 | ret = 1; |
| 2371 | goto out_unlock; |
| 2372 | } |
| 2373 | |
Yan, Zheng | 7731032 | 2016-04-08 15:27:16 +0800 | [diff] [blame] | 2374 | if (ci->i_ceph_flags & CEPH_I_CAP_DROPPED) { |
| 2375 | int mds_wanted; |
| 2376 | if (ACCESS_ONCE(mdsc->fsc->mount_state) == |
| 2377 | CEPH_MOUNT_SHUTDOWN) { |
| 2378 | dout("get_cap_refs %p forced umount\n", inode); |
| 2379 | *err = -EIO; |
| 2380 | ret = 1; |
| 2381 | goto out_unlock; |
| 2382 | } |
| 2383 | mds_wanted = __ceph_caps_mds_wanted(ci); |
| 2384 | if ((mds_wanted & need) != need) { |
| 2385 | dout("get_cap_refs %p caps were dropped" |
| 2386 | " (session killed?)\n", inode); |
| 2387 | *err = -ESTALE; |
| 2388 | ret = 1; |
| 2389 | goto out_unlock; |
| 2390 | } |
| 2391 | if ((mds_wanted & file_wanted) == |
| 2392 | (file_wanted & (CEPH_CAP_FILE_RD|CEPH_CAP_FILE_WR))) |
| 2393 | ci->i_ceph_flags &= ~CEPH_I_CAP_DROPPED; |
Yan, Zheng | 48fec5d | 2015-07-01 16:27:46 +0800 | [diff] [blame] | 2394 | } |
| 2395 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2396 | dout("get_cap_refs %p have %s needed %s\n", inode, |
| 2397 | ceph_cap_string(have), ceph_cap_string(need)); |
| 2398 | } |
Yan, Zheng | 3738daa | 2014-11-14 22:10:07 +0800 | [diff] [blame] | 2399 | out_unlock: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2400 | spin_unlock(&ci->i_ceph_lock); |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2401 | if (snap_rwsem_locked) |
| 2402 | up_read(&mdsc->snap_rwsem); |
Yan, Zheng | 3738daa | 2014-11-14 22:10:07 +0800 | [diff] [blame] | 2403 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2404 | dout("get_cap_refs %p ret %d got %s\n", inode, |
Yan, Zheng | c4d4a58 | 2015-01-09 15:56:18 +0800 | [diff] [blame] | 2405 | ret, ceph_cap_string(*got)); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2406 | return ret; |
| 2407 | } |
| 2408 | |
| 2409 | /* |
| 2410 | * Check the offset we are writing up to against our current |
| 2411 | * max_size. If necessary, tell the MDS we want to write to |
| 2412 | * a larger offset. |
| 2413 | */ |
| 2414 | static void check_max_size(struct inode *inode, loff_t endoff) |
| 2415 | { |
| 2416 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 2417 | int check = 0; |
| 2418 | |
| 2419 | /* do we need to explicitly request a larger max_size? */ |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2420 | spin_lock(&ci->i_ceph_lock); |
Yan, Zheng | 3871cbb | 2013-08-05 14:10:29 +0800 | [diff] [blame] | 2421 | if (endoff >= ci->i_max_size && endoff > ci->i_wanted_max_size) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2422 | dout("write %p at large endoff %llu, req max_size\n", |
| 2423 | inode, endoff); |
| 2424 | ci->i_wanted_max_size = endoff; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2425 | } |
Yan, Zheng | 3871cbb | 2013-08-05 14:10:29 +0800 | [diff] [blame] | 2426 | /* duplicate ceph_check_caps()'s logic */ |
| 2427 | if (ci->i_auth_cap && |
| 2428 | (ci->i_auth_cap->issued & CEPH_CAP_FILE_WR) && |
| 2429 | ci->i_wanted_max_size > ci->i_max_size && |
| 2430 | ci->i_wanted_max_size > ci->i_requested_max_size) |
| 2431 | check = 1; |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2432 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2433 | if (check) |
| 2434 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); |
| 2435 | } |
| 2436 | |
| 2437 | /* |
| 2438 | * Wait for caps, and take cap references. If we can't get a WR cap |
| 2439 | * due to a small max_size, make sure we check_max_size (and possibly |
| 2440 | * ask the mds) so we don't get hung up indefinitely. |
| 2441 | */ |
Yan, Zheng | 3738daa | 2014-11-14 22:10:07 +0800 | [diff] [blame] | 2442 | int ceph_get_caps(struct ceph_inode_info *ci, int need, int want, |
| 2443 | loff_t endoff, int *got, struct page **pinned_page) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2444 | { |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2445 | int _got, ret, err = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2446 | |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 2447 | ret = ceph_pool_perm_check(ci, need); |
| 2448 | if (ret < 0) |
| 2449 | return ret; |
| 2450 | |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2451 | while (true) { |
| 2452 | if (endoff > 0) |
| 2453 | check_max_size(&ci->vfs_inode, endoff); |
Yan, Zheng | c4d4a58 | 2015-01-09 15:56:18 +0800 | [diff] [blame] | 2454 | |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2455 | err = 0; |
Yan, Zheng | c4d4a58 | 2015-01-09 15:56:18 +0800 | [diff] [blame] | 2456 | _got = 0; |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2457 | ret = try_get_cap_refs(ci, need, want, endoff, |
| 2458 | false, &_got, &err); |
| 2459 | if (ret) { |
| 2460 | if (err == -EAGAIN) |
| 2461 | continue; |
| 2462 | if (err < 0) |
Yan, Zheng | 7731032 | 2016-04-08 15:27:16 +0800 | [diff] [blame] | 2463 | ret = err; |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2464 | } else { |
| 2465 | ret = wait_event_interruptible(ci->i_cap_wq, |
| 2466 | try_get_cap_refs(ci, need, want, endoff, |
| 2467 | true, &_got, &err)); |
| 2468 | if (err == -EAGAIN) |
| 2469 | continue; |
| 2470 | if (err < 0) |
| 2471 | ret = err; |
Yan, Zheng | 7731032 | 2016-04-08 15:27:16 +0800 | [diff] [blame] | 2472 | } |
| 2473 | if (ret < 0) { |
| 2474 | if (err == -ESTALE) { |
| 2475 | /* session was killed, try renew caps */ |
| 2476 | ret = ceph_renew_caps(&ci->vfs_inode); |
| 2477 | if (ret == 0) |
| 2478 | continue; |
| 2479 | } |
| 2480 | return ret; |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2481 | } |
Yan, Zheng | c4d4a58 | 2015-01-09 15:56:18 +0800 | [diff] [blame] | 2482 | |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2483 | if (ci->i_inline_version != CEPH_INLINE_NONE && |
| 2484 | (_got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) && |
| 2485 | i_size_read(&ci->vfs_inode) > 0) { |
| 2486 | struct page *page = |
| 2487 | find_get_page(ci->vfs_inode.i_mapping, 0); |
| 2488 | if (page) { |
| 2489 | if (PageUptodate(page)) { |
| 2490 | *pinned_page = page; |
| 2491 | break; |
| 2492 | } |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2493 | put_page(page); |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2494 | } |
| 2495 | /* |
| 2496 | * drop cap refs first because getattr while |
| 2497 | * holding * caps refs can cause deadlock. |
| 2498 | */ |
| 2499 | ceph_put_cap_refs(ci, _got); |
| 2500 | _got = 0; |
| 2501 | |
| 2502 | /* |
| 2503 | * getattr request will bring inline data into |
| 2504 | * page cache |
| 2505 | */ |
| 2506 | ret = __ceph_do_getattr(&ci->vfs_inode, NULL, |
| 2507 | CEPH_STAT_CAP_INLINE_DATA, |
| 2508 | true); |
| 2509 | if (ret < 0) |
| 2510 | return ret; |
| 2511 | continue; |
| 2512 | } |
| 2513 | break; |
Yan, Zheng | c4d4a58 | 2015-01-09 15:56:18 +0800 | [diff] [blame] | 2514 | } |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2515 | |
Yan, Zheng | f7f7e7a | 2016-05-18 20:31:55 +0800 | [diff] [blame] | 2516 | if ((_got & CEPH_CAP_FILE_RD) && (_got & CEPH_CAP_FILE_CACHE)) |
| 2517 | ceph_fscache_revalidate_cookie(ci); |
| 2518 | |
Yan, Zheng | c4d4a58 | 2015-01-09 15:56:18 +0800 | [diff] [blame] | 2519 | *got = _got; |
| 2520 | return 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2521 | } |
| 2522 | |
| 2523 | /* |
| 2524 | * Take cap refs. Caller must already know we hold at least one ref |
| 2525 | * on the caps in question or we don't know this is safe. |
| 2526 | */ |
| 2527 | void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps) |
| 2528 | { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2529 | spin_lock(&ci->i_ceph_lock); |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2530 | __take_cap_refs(ci, caps, false); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2531 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2532 | } |
| 2533 | |
Yan, Zheng | 8605609 | 2015-05-01 16:57:16 +0800 | [diff] [blame] | 2534 | |
| 2535 | /* |
| 2536 | * drop cap_snap that is not associated with any snapshot. |
| 2537 | * we don't need to send FLUSHSNAP message for it. |
| 2538 | */ |
| 2539 | static int ceph_try_drop_cap_snap(struct ceph_cap_snap *capsnap) |
| 2540 | { |
| 2541 | if (!capsnap->need_flush && |
| 2542 | !capsnap->writing && !capsnap->dirty_pages) { |
| 2543 | |
| 2544 | dout("dropping cap_snap %p follows %llu\n", |
| 2545 | capsnap, capsnap->follows); |
| 2546 | ceph_put_snap_context(capsnap->context); |
| 2547 | list_del(&capsnap->ci_item); |
| 2548 | list_del(&capsnap->flushing_item); |
| 2549 | ceph_put_cap_snap(capsnap); |
| 2550 | return 1; |
| 2551 | } |
| 2552 | return 0; |
| 2553 | } |
| 2554 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2555 | /* |
| 2556 | * Release cap refs. |
| 2557 | * |
| 2558 | * If we released the last ref on any given cap, call ceph_check_caps |
| 2559 | * to release (or schedule a release). |
| 2560 | * |
| 2561 | * If we are releasing a WR cap (from a sync write), finalize any affected |
| 2562 | * cap_snap, and wake up any waiters. |
| 2563 | */ |
| 2564 | void ceph_put_cap_refs(struct ceph_inode_info *ci, int had) |
| 2565 | { |
| 2566 | struct inode *inode = &ci->vfs_inode; |
| 2567 | int last = 0, put = 0, flushsnaps = 0, wake = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2568 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2569 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2570 | if (had & CEPH_CAP_PIN) |
| 2571 | --ci->i_pin_ref; |
| 2572 | if (had & CEPH_CAP_FILE_RD) |
| 2573 | if (--ci->i_rd_ref == 0) |
| 2574 | last++; |
| 2575 | if (had & CEPH_CAP_FILE_CACHE) |
| 2576 | if (--ci->i_rdcache_ref == 0) |
| 2577 | last++; |
| 2578 | if (had & CEPH_CAP_FILE_BUFFER) { |
Henry C Chang | d3d0720 | 2011-05-11 10:29:54 +0000 | [diff] [blame] | 2579 | if (--ci->i_wb_ref == 0) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2580 | last++; |
| 2581 | put++; |
| 2582 | } |
Henry C Chang | d3d0720 | 2011-05-11 10:29:54 +0000 | [diff] [blame] | 2583 | dout("put_cap_refs %p wb %d -> %d (?)\n", |
| 2584 | inode, ci->i_wb_ref+1, ci->i_wb_ref); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2585 | } |
| 2586 | if (had & CEPH_CAP_FILE_WR) |
| 2587 | if (--ci->i_wr_ref == 0) { |
| 2588 | last++; |
Yan, Zheng | 8605609 | 2015-05-01 16:57:16 +0800 | [diff] [blame] | 2589 | if (__ceph_have_pending_cap_snap(ci)) { |
| 2590 | struct ceph_cap_snap *capsnap = |
| 2591 | list_last_entry(&ci->i_cap_snaps, |
| 2592 | struct ceph_cap_snap, |
| 2593 | ci_item); |
| 2594 | capsnap->writing = 0; |
| 2595 | if (ceph_try_drop_cap_snap(capsnap)) |
| 2596 | put++; |
| 2597 | else if (__ceph_finish_cap_snap(ci, capsnap)) |
| 2598 | flushsnaps = 1; |
| 2599 | wake = 1; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2600 | } |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2601 | if (ci->i_wrbuffer_ref_head == 0 && |
| 2602 | ci->i_dirty_caps == 0 && |
| 2603 | ci->i_flushing_caps == 0) { |
| 2604 | BUG_ON(!ci->i_head_snapc); |
| 2605 | ceph_put_snap_context(ci->i_head_snapc); |
| 2606 | ci->i_head_snapc = NULL; |
| 2607 | } |
Yan, Zheng | db40cc1 | 2015-03-23 20:12:20 +0800 | [diff] [blame] | 2608 | /* see comment in __ceph_remove_cap() */ |
| 2609 | if (!__ceph_is_any_caps(ci) && ci->i_snap_realm) |
| 2610 | drop_inode_snap_realm(ci); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2611 | } |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2612 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2613 | |
Sage Weil | 819ccbf | 2010-04-01 09:33:46 -0700 | [diff] [blame] | 2614 | dout("put_cap_refs %p had %s%s%s\n", inode, ceph_cap_string(had), |
| 2615 | last ? " last" : "", put ? " put" : ""); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2616 | |
| 2617 | if (last && !flushsnaps) |
| 2618 | ceph_check_caps(ci, 0, NULL); |
| 2619 | else if (flushsnaps) |
| 2620 | ceph_flush_snaps(ci); |
| 2621 | if (wake) |
Yehuda Sadeh | 03066f2 | 2010-07-27 13:11:08 -0700 | [diff] [blame] | 2622 | wake_up_all(&ci->i_cap_wq); |
Yan, Zheng | 8605609 | 2015-05-01 16:57:16 +0800 | [diff] [blame] | 2623 | while (put-- > 0) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2624 | iput(inode); |
| 2625 | } |
| 2626 | |
| 2627 | /* |
| 2628 | * Release @nr WRBUFFER refs on dirty pages for the given @snapc snap |
| 2629 | * context. Adjust per-snap dirty page accounting as appropriate. |
| 2630 | * Once all dirty data for a cap_snap is flushed, flush snapped file |
| 2631 | * metadata back to the MDS. If we dropped the last ref, call |
| 2632 | * ceph_check_caps. |
| 2633 | */ |
| 2634 | void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, |
| 2635 | struct ceph_snap_context *snapc) |
| 2636 | { |
| 2637 | struct inode *inode = &ci->vfs_inode; |
| 2638 | int last = 0; |
Sage Weil | 819ccbf | 2010-04-01 09:33:46 -0700 | [diff] [blame] | 2639 | int complete_capsnap = 0; |
| 2640 | int drop_capsnap = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2641 | int found = 0; |
| 2642 | struct ceph_cap_snap *capsnap = NULL; |
| 2643 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2644 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2645 | ci->i_wrbuffer_ref -= nr; |
| 2646 | last = !ci->i_wrbuffer_ref; |
| 2647 | |
| 2648 | if (ci->i_head_snapc == snapc) { |
| 2649 | ci->i_wrbuffer_ref_head -= nr; |
Sage Weil | 7d8cb26 | 2010-08-24 08:44:16 -0700 | [diff] [blame] | 2650 | if (ci->i_wrbuffer_ref_head == 0 && |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 2651 | ci->i_wr_ref == 0 && |
| 2652 | ci->i_dirty_caps == 0 && |
| 2653 | ci->i_flushing_caps == 0) { |
Sage Weil | 7d8cb26 | 2010-08-24 08:44:16 -0700 | [diff] [blame] | 2654 | BUG_ON(!ci->i_head_snapc); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2655 | ceph_put_snap_context(ci->i_head_snapc); |
| 2656 | ci->i_head_snapc = NULL; |
| 2657 | } |
| 2658 | dout("put_wrbuffer_cap_refs on %p head %d/%d -> %d/%d %s\n", |
| 2659 | inode, |
| 2660 | ci->i_wrbuffer_ref+nr, ci->i_wrbuffer_ref_head+nr, |
| 2661 | ci->i_wrbuffer_ref, ci->i_wrbuffer_ref_head, |
| 2662 | last ? " LAST" : ""); |
| 2663 | } else { |
| 2664 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { |
| 2665 | if (capsnap->context == snapc) { |
| 2666 | found = 1; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2667 | break; |
| 2668 | } |
| 2669 | } |
| 2670 | BUG_ON(!found); |
Sage Weil | 819ccbf | 2010-04-01 09:33:46 -0700 | [diff] [blame] | 2671 | capsnap->dirty_pages -= nr; |
| 2672 | if (capsnap->dirty_pages == 0) { |
| 2673 | complete_capsnap = 1; |
Yan, Zheng | 8605609 | 2015-05-01 16:57:16 +0800 | [diff] [blame] | 2674 | drop_capsnap = ceph_try_drop_cap_snap(capsnap); |
Sage Weil | 819ccbf | 2010-04-01 09:33:46 -0700 | [diff] [blame] | 2675 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2676 | dout("put_wrbuffer_cap_refs on %p cap_snap %p " |
Yan, Zheng | 8605609 | 2015-05-01 16:57:16 +0800 | [diff] [blame] | 2677 | " snap %lld %d/%d -> %d/%d %s%s\n", |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2678 | inode, capsnap, capsnap->context->seq, |
| 2679 | ci->i_wrbuffer_ref+nr, capsnap->dirty_pages + nr, |
| 2680 | ci->i_wrbuffer_ref, capsnap->dirty_pages, |
| 2681 | last ? " (wrbuffer last)" : "", |
Yan, Zheng | 8605609 | 2015-05-01 16:57:16 +0800 | [diff] [blame] | 2682 | complete_capsnap ? " (complete capsnap)" : ""); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2683 | } |
| 2684 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2685 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2686 | |
| 2687 | if (last) { |
| 2688 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); |
| 2689 | iput(inode); |
Sage Weil | 819ccbf | 2010-04-01 09:33:46 -0700 | [diff] [blame] | 2690 | } else if (complete_capsnap) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2691 | ceph_flush_snaps(ci); |
Yehuda Sadeh | 03066f2 | 2010-07-27 13:11:08 -0700 | [diff] [blame] | 2692 | wake_up_all(&ci->i_cap_wq); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2693 | } |
Sage Weil | 819ccbf | 2010-04-01 09:33:46 -0700 | [diff] [blame] | 2694 | if (drop_capsnap) |
| 2695 | iput(inode); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2696 | } |
| 2697 | |
| 2698 | /* |
Yan, Zheng | ca20c99 | 2013-07-21 10:07:51 +0800 | [diff] [blame] | 2699 | * Invalidate unlinked inode's aliases, so we can drop the inode ASAP. |
| 2700 | */ |
| 2701 | static void invalidate_aliases(struct inode *inode) |
| 2702 | { |
| 2703 | struct dentry *dn, *prev = NULL; |
| 2704 | |
| 2705 | dout("invalidate_aliases inode %p\n", inode); |
| 2706 | d_prune_aliases(inode); |
| 2707 | /* |
| 2708 | * For non-directory inode, d_find_alias() only returns |
J. Bruce Fields | fc12c80 | 2014-01-16 17:42:53 -0500 | [diff] [blame] | 2709 | * hashed dentry. After calling d_invalidate(), the |
| 2710 | * dentry becomes unhashed. |
Yan, Zheng | ca20c99 | 2013-07-21 10:07:51 +0800 | [diff] [blame] | 2711 | * |
Yan, Zheng | a8d436f | 2013-09-02 15:19:54 +0800 | [diff] [blame] | 2712 | * For directory inode, d_find_alias() can return |
J. Bruce Fields | fc12c80 | 2014-01-16 17:42:53 -0500 | [diff] [blame] | 2713 | * unhashed dentry. But directory inode should have |
Yan, Zheng | ca20c99 | 2013-07-21 10:07:51 +0800 | [diff] [blame] | 2714 | * one alias at most. |
| 2715 | */ |
| 2716 | while ((dn = d_find_alias(inode))) { |
| 2717 | if (dn == prev) { |
| 2718 | dput(dn); |
| 2719 | break; |
| 2720 | } |
Yan, Zheng | a8d436f | 2013-09-02 15:19:54 +0800 | [diff] [blame] | 2721 | d_invalidate(dn); |
Yan, Zheng | ca20c99 | 2013-07-21 10:07:51 +0800 | [diff] [blame] | 2722 | if (prev) |
| 2723 | dput(prev); |
| 2724 | prev = dn; |
| 2725 | } |
| 2726 | if (prev) |
| 2727 | dput(prev); |
| 2728 | } |
| 2729 | |
| 2730 | /* |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2731 | * Handle a cap GRANT message from the MDS. (Note that a GRANT may |
| 2732 | * actually be a revocation if it specifies a smaller cap set.) |
| 2733 | * |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2734 | * caller holds s_mutex and i_ceph_lock, we drop both. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2735 | */ |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 2736 | static void handle_cap_grant(struct ceph_mds_client *mdsc, |
| 2737 | struct inode *inode, struct ceph_mds_caps *grant, |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 2738 | struct ceph_string **pns, u64 inline_version, |
| 2739 | void *inline_data, u32 inline_len, |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 2740 | struct ceph_buffer *xattr_buf, |
Sage Weil | 15637c8 | 2010-03-16 13:42:00 -0700 | [diff] [blame] | 2741 | struct ceph_mds_session *session, |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 2742 | struct ceph_cap *cap, int issued) |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 2743 | __releases(ci->i_ceph_lock) |
Yan, Zheng | 982d601 | 2014-12-23 15:30:54 +0800 | [diff] [blame] | 2744 | __releases(mdsc->snap_rwsem) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2745 | { |
| 2746 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 2747 | int mds = session->s_mds; |
Sage Weil | 2f56f56 | 2010-10-27 20:59:49 -0700 | [diff] [blame] | 2748 | int seq = le32_to_cpu(grant->seq); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2749 | int newcaps = le32_to_cpu(grant->caps); |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 2750 | int used, wanted, dirty; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2751 | u64 size = le64_to_cpu(grant->size); |
| 2752 | u64 max_size = le64_to_cpu(grant->max_size); |
| 2753 | struct timespec mtime, atime, ctime; |
Sage Weil | 15637c8 | 2010-03-16 13:42:00 -0700 | [diff] [blame] | 2754 | int check_caps = 0; |
Fabian Frederick | ab6c2c3 | 2014-10-09 23:16:35 +0200 | [diff] [blame] | 2755 | bool wake = false; |
| 2756 | bool writeback = false; |
| 2757 | bool queue_trunc = false; |
| 2758 | bool queue_invalidate = false; |
Fabian Frederick | ab6c2c3 | 2014-10-09 23:16:35 +0200 | [diff] [blame] | 2759 | bool deleted_inode = false; |
Yan, Zheng | 31c542a | 2014-11-14 21:41:55 +0800 | [diff] [blame] | 2760 | bool fill_inline = false; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2761 | |
Sage Weil | 2f56f56 | 2010-10-27 20:59:49 -0700 | [diff] [blame] | 2762 | dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n", |
| 2763 | inode, cap, mds, seq, ceph_cap_string(newcaps)); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2764 | dout(" size %llu max_size %llu, i_size %llu\n", size, max_size, |
| 2765 | inode->i_size); |
| 2766 | |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 2767 | |
| 2768 | /* |
| 2769 | * auth mds of the inode changed. we received the cap export message, |
| 2770 | * but still haven't received the cap import message. handle_cap_export |
| 2771 | * updated the new auth MDS' cap. |
| 2772 | * |
| 2773 | * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message |
| 2774 | * that was sent before the cap import message. So don't remove caps. |
| 2775 | */ |
| 2776 | if (ceph_seq_cmp(seq, cap->seq) <= 0) { |
| 2777 | WARN_ON(cap != ci->i_auth_cap); |
| 2778 | WARN_ON(cap->cap_id != le64_to_cpu(grant->cap_id)); |
| 2779 | seq = cap->seq; |
| 2780 | newcaps |= cap->issued; |
| 2781 | } |
| 2782 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2783 | /* |
| 2784 | * If CACHE is being revoked, and we have no dirty buffers, |
| 2785 | * try to invalidate (once). (If there are dirty buffers, we |
| 2786 | * will invalidate _after_ writeback.) |
| 2787 | */ |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 2788 | if (!S_ISDIR(inode->i_mode) && /* don't invalidate readdir cache */ |
| 2789 | ((cap->issued & ~newcaps) & CEPH_CAP_FILE_CACHE) && |
Sage Weil | 3b454c4 | 2010-06-10 13:20:33 -0700 | [diff] [blame] | 2790 | (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 && |
Yan, Zheng | 9abd4db | 2016-05-18 20:58:26 +0800 | [diff] [blame] | 2791 | !(ci->i_wrbuffer_ref || ci->i_wb_ref)) { |
Li Wang | e907574 | 2013-08-15 22:00:25 -0700 | [diff] [blame] | 2792 | if (try_nonblocking_invalidate(inode)) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2793 | /* there were locked pages.. invalidate later |
| 2794 | in a separate thread. */ |
| 2795 | if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { |
Fabian Frederick | ab6c2c3 | 2014-10-09 23:16:35 +0200 | [diff] [blame] | 2796 | queue_invalidate = true; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2797 | ci->i_rdcache_revoking = ci->i_rdcache_gen; |
| 2798 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2799 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2800 | } |
| 2801 | |
| 2802 | /* side effects now are allowed */ |
Sage Weil | 685f9a5d | 2009-11-09 12:05:48 -0800 | [diff] [blame] | 2803 | cap->cap_gen = session->s_cap_gen; |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 2804 | cap->seq = seq; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2805 | |
| 2806 | __check_cap_issue(ci, cap, newcaps); |
| 2807 | |
Yan, Zheng | f98a128 | 2014-04-17 08:55:50 +0800 | [diff] [blame] | 2808 | if ((newcaps & CEPH_CAP_AUTH_SHARED) && |
| 2809 | (issued & CEPH_CAP_AUTH_EXCL) == 0) { |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2810 | inode->i_mode = le32_to_cpu(grant->mode); |
Eric W. Biederman | 05cb11c | 2013-01-31 02:56:19 -0800 | [diff] [blame] | 2811 | inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(grant->uid)); |
| 2812 | inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(grant->gid)); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2813 | dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, |
Eric W. Biederman | bd2bae6 | 2013-01-31 04:05:39 -0800 | [diff] [blame] | 2814 | from_kuid(&init_user_ns, inode->i_uid), |
| 2815 | from_kgid(&init_user_ns, inode->i_gid)); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2816 | } |
| 2817 | |
Yan, Zheng | f98a128 | 2014-04-17 08:55:50 +0800 | [diff] [blame] | 2818 | if ((newcaps & CEPH_CAP_AUTH_SHARED) && |
| 2819 | (issued & CEPH_CAP_LINK_EXCL) == 0) { |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 2820 | set_nlink(inode, le32_to_cpu(grant->nlink)); |
Yan, Zheng | ca20c99 | 2013-07-21 10:07:51 +0800 | [diff] [blame] | 2821 | if (inode->i_nlink == 0 && |
| 2822 | (newcaps & (CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL))) |
Fabian Frederick | ab6c2c3 | 2014-10-09 23:16:35 +0200 | [diff] [blame] | 2823 | deleted_inode = true; |
Yan, Zheng | ca20c99 | 2013-07-21 10:07:51 +0800 | [diff] [blame] | 2824 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2825 | |
| 2826 | if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && grant->xattr_len) { |
| 2827 | int len = le32_to_cpu(grant->xattr_len); |
| 2828 | u64 version = le64_to_cpu(grant->xattr_version); |
| 2829 | |
| 2830 | if (version > ci->i_xattrs.version) { |
| 2831 | dout(" got new xattrs v%llu on %p len %d\n", |
| 2832 | version, inode, len); |
| 2833 | if (ci->i_xattrs.blob) |
| 2834 | ceph_buffer_put(ci->i_xattrs.blob); |
| 2835 | ci->i_xattrs.blob = ceph_buffer_get(xattr_buf); |
| 2836 | ci->i_xattrs.version = version; |
Guangliang Zhao | 7221fe4 | 2013-11-11 15:18:03 +0800 | [diff] [blame] | 2837 | ceph_forget_all_cached_acls(inode); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2838 | } |
| 2839 | } |
| 2840 | |
Yan, Zheng | f98a128 | 2014-04-17 08:55:50 +0800 | [diff] [blame] | 2841 | if (newcaps & CEPH_CAP_ANY_RD) { |
| 2842 | /* ctime/mtime/atime? */ |
| 2843 | ceph_decode_timespec(&mtime, &grant->mtime); |
| 2844 | ceph_decode_timespec(&atime, &grant->atime); |
| 2845 | ceph_decode_timespec(&ctime, &grant->ctime); |
| 2846 | ceph_fill_file_time(inode, issued, |
| 2847 | le32_to_cpu(grant->time_warp_seq), |
| 2848 | &ctime, &mtime, &atime); |
| 2849 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2850 | |
Yan, Zheng | f98a128 | 2014-04-17 08:55:50 +0800 | [diff] [blame] | 2851 | if (newcaps & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR)) { |
| 2852 | /* file layout may have changed */ |
Yan, Zheng | 7627151 | 2016-02-03 21:24:49 +0800 | [diff] [blame] | 2853 | s64 old_pool = ci->i_layout.pool_id; |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 2854 | struct ceph_string *old_ns; |
| 2855 | |
Yan, Zheng | 7627151 | 2016-02-03 21:24:49 +0800 | [diff] [blame] | 2856 | ceph_file_layout_from_legacy(&ci->i_layout, &grant->layout); |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 2857 | old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, |
| 2858 | lockdep_is_held(&ci->i_ceph_lock)); |
| 2859 | rcu_assign_pointer(ci->i_layout.pool_ns, *pns); |
| 2860 | |
| 2861 | if (ci->i_layout.pool_id != old_pool || *pns != old_ns) |
Yan, Zheng | 7627151 | 2016-02-03 21:24:49 +0800 | [diff] [blame] | 2862 | ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; |
Yan, Zheng | 5ea5c5e | 2016-02-14 18:06:41 +0800 | [diff] [blame] | 2863 | |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 2864 | *pns = old_ns; |
| 2865 | |
Yan, Zheng | f98a128 | 2014-04-17 08:55:50 +0800 | [diff] [blame] | 2866 | /* size/truncate_seq? */ |
| 2867 | queue_trunc = ceph_fill_file_size(inode, issued, |
| 2868 | le32_to_cpu(grant->truncate_seq), |
| 2869 | le64_to_cpu(grant->truncate_size), |
| 2870 | size); |
| 2871 | /* max size increase? */ |
| 2872 | if (ci->i_auth_cap == cap && max_size != ci->i_max_size) { |
| 2873 | dout("max_size %lld -> %llu\n", |
| 2874 | ci->i_max_size, max_size); |
| 2875 | ci->i_max_size = max_size; |
| 2876 | if (max_size >= ci->i_wanted_max_size) { |
| 2877 | ci->i_wanted_max_size = 0; /* reset */ |
| 2878 | ci->i_requested_max_size = 0; |
| 2879 | } |
Fabian Frederick | ab6c2c3 | 2014-10-09 23:16:35 +0200 | [diff] [blame] | 2880 | wake = true; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2881 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2882 | } |
| 2883 | |
| 2884 | /* check cap bits */ |
| 2885 | wanted = __ceph_caps_wanted(ci); |
| 2886 | used = __ceph_caps_used(ci); |
| 2887 | dirty = __ceph_caps_dirty(ci); |
| 2888 | dout(" my wanted = %s, used = %s, dirty %s\n", |
| 2889 | ceph_cap_string(wanted), |
| 2890 | ceph_cap_string(used), |
| 2891 | ceph_cap_string(dirty)); |
| 2892 | if (wanted != le32_to_cpu(grant->wanted)) { |
| 2893 | dout("mds wanted %s -> %s\n", |
| 2894 | ceph_cap_string(le32_to_cpu(grant->wanted)), |
| 2895 | ceph_cap_string(wanted)); |
Yan, Zheng | 390306c | 2013-01-04 15:30:10 +0800 | [diff] [blame] | 2896 | /* imported cap may not have correct mds_wanted */ |
| 2897 | if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) |
| 2898 | check_caps = 1; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2899 | } |
| 2900 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2901 | /* revocation, grant, or no-op? */ |
| 2902 | if (cap->issued & ~newcaps) { |
Sage Weil | 3b454c4 | 2010-06-10 13:20:33 -0700 | [diff] [blame] | 2903 | int revoking = cap->issued & ~newcaps; |
| 2904 | |
| 2905 | dout("revocation: %s -> %s (revoking %s)\n", |
| 2906 | ceph_cap_string(cap->issued), |
| 2907 | ceph_cap_string(newcaps), |
| 2908 | ceph_cap_string(revoking)); |
Sage Weil | 0eb6cd4 | 2010-08-05 13:53:18 -0700 | [diff] [blame] | 2909 | if (revoking & used & CEPH_CAP_FILE_BUFFER) |
Fabian Frederick | ab6c2c3 | 2014-10-09 23:16:35 +0200 | [diff] [blame] | 2910 | writeback = true; /* initiate writeback; will delay ack */ |
Sage Weil | 3b454c4 | 2010-06-10 13:20:33 -0700 | [diff] [blame] | 2911 | else if (revoking == CEPH_CAP_FILE_CACHE && |
| 2912 | (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 && |
| 2913 | queue_invalidate) |
| 2914 | ; /* do nothing yet, invalidation will be queued */ |
| 2915 | else if (cap == ci->i_auth_cap) |
| 2916 | check_caps = 1; /* check auth cap only */ |
| 2917 | else |
| 2918 | check_caps = 2; /* check all caps */ |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2919 | cap->issued = newcaps; |
Sage Weil | 978097c | 2010-03-08 15:27:53 -0800 | [diff] [blame] | 2920 | cap->implemented |= newcaps; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2921 | } else if (cap->issued == newcaps) { |
| 2922 | dout("caps unchanged: %s -> %s\n", |
| 2923 | ceph_cap_string(cap->issued), ceph_cap_string(newcaps)); |
| 2924 | } else { |
| 2925 | dout("grant: %s -> %s\n", ceph_cap_string(cap->issued), |
| 2926 | ceph_cap_string(newcaps)); |
Yan, Zheng | 6ee6b953 | 2013-07-02 12:40:21 +0800 | [diff] [blame] | 2927 | /* non-auth MDS is revoking the newly grant caps ? */ |
| 2928 | if (cap == ci->i_auth_cap && |
| 2929 | __ceph_caps_revoking_other(ci, cap, newcaps)) |
| 2930 | check_caps = 2; |
| 2931 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2932 | cap->issued = newcaps; |
| 2933 | cap->implemented |= newcaps; /* add bits only, to |
| 2934 | * avoid stepping on a |
| 2935 | * pending revocation */ |
Fabian Frederick | ab6c2c3 | 2014-10-09 23:16:35 +0200 | [diff] [blame] | 2936 | wake = true; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2937 | } |
Sage Weil | 978097c | 2010-03-08 15:27:53 -0800 | [diff] [blame] | 2938 | BUG_ON(cap->issued & ~cap->implemented); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2939 | |
Yan, Zheng | 31c542a | 2014-11-14 21:41:55 +0800 | [diff] [blame] | 2940 | if (inline_version > 0 && inline_version >= ci->i_inline_version) { |
| 2941 | ci->i_inline_version = inline_version; |
| 2942 | if (ci->i_inline_version != CEPH_INLINE_NONE && |
| 2943 | (newcaps & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO))) |
| 2944 | fill_inline = true; |
| 2945 | } |
| 2946 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2947 | spin_unlock(&ci->i_ceph_lock); |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 2948 | |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 2949 | if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) { |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 2950 | kick_flushing_inode_caps(mdsc, session, inode); |
| 2951 | up_read(&mdsc->snap_rwsem); |
| 2952 | if (newcaps & ~issued) |
Fabian Frederick | ab6c2c3 | 2014-10-09 23:16:35 +0200 | [diff] [blame] | 2953 | wake = true; |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 2954 | } |
| 2955 | |
Yan, Zheng | 31c542a | 2014-11-14 21:41:55 +0800 | [diff] [blame] | 2956 | if (fill_inline) |
| 2957 | ceph_fill_inline_data(inode, NULL, inline_data, inline_len); |
| 2958 | |
Yan, Zheng | 1464975 | 2016-05-20 15:41:20 +0800 | [diff] [blame] | 2959 | if (queue_trunc) |
Yan, Zheng | c6bcda6 | 2014-04-11 10:18:07 +0800 | [diff] [blame] | 2960 | ceph_queue_vmtruncate(inode); |
Yan, Zheng | c6bcda6 | 2014-04-11 10:18:07 +0800 | [diff] [blame] | 2961 | |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 2962 | if (writeback) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2963 | /* |
| 2964 | * queue inode for writeback: we can't actually call |
| 2965 | * filemap_write_and_wait, etc. from message handler |
| 2966 | * context. |
| 2967 | */ |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 2968 | ceph_queue_writeback(inode); |
| 2969 | if (queue_invalidate) |
| 2970 | ceph_queue_invalidate(inode); |
Yan, Zheng | ca20c99 | 2013-07-21 10:07:51 +0800 | [diff] [blame] | 2971 | if (deleted_inode) |
| 2972 | invalidate_aliases(inode); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2973 | if (wake) |
Yehuda Sadeh | 03066f2 | 2010-07-27 13:11:08 -0700 | [diff] [blame] | 2974 | wake_up_all(&ci->i_cap_wq); |
Sage Weil | 15637c8 | 2010-03-16 13:42:00 -0700 | [diff] [blame] | 2975 | |
| 2976 | if (check_caps == 1) |
| 2977 | ceph_check_caps(ci, CHECK_CAPS_NODELAY|CHECK_CAPS_AUTHONLY, |
| 2978 | session); |
| 2979 | else if (check_caps == 2) |
| 2980 | ceph_check_caps(ci, CHECK_CAPS_NODELAY, session); |
| 2981 | else |
| 2982 | mutex_unlock(&session->s_mutex); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2983 | } |
| 2984 | |
| 2985 | /* |
| 2986 | * Handle FLUSH_ACK from MDS, indicating that metadata we sent to the |
| 2987 | * MDS has been safely committed. |
| 2988 | */ |
Sage Weil | 6df058c | 2009-12-22 11:24:33 -0800 | [diff] [blame] | 2989 | static void handle_cap_flush_ack(struct inode *inode, u64 flush_tid, |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2990 | struct ceph_mds_caps *m, |
| 2991 | struct ceph_mds_session *session, |
| 2992 | struct ceph_cap *cap) |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 2993 | __releases(ci->i_ceph_lock) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 2994 | { |
| 2995 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2996 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 2997 | struct ceph_cap_flush *cf; |
| 2998 | struct rb_node *n; |
| 2999 | LIST_HEAD(to_remove); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3000 | unsigned seq = le32_to_cpu(m->seq); |
| 3001 | int dirty = le32_to_cpu(m->dirty); |
| 3002 | int cleaned = 0; |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3003 | int drop = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3004 | |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 3005 | n = rb_first(&ci->i_cap_flush_tree); |
| 3006 | while (n) { |
| 3007 | cf = rb_entry(n, struct ceph_cap_flush, i_node); |
| 3008 | n = rb_next(&cf->i_node); |
| 3009 | if (cf->tid == flush_tid) |
| 3010 | cleaned = cf->caps; |
| 3011 | if (cf->tid <= flush_tid) { |
| 3012 | rb_erase(&cf->i_node, &ci->i_cap_flush_tree); |
| 3013 | list_add_tail(&cf->list, &to_remove); |
| 3014 | } else { |
| 3015 | cleaned &= ~cf->caps; |
| 3016 | if (!cleaned) |
| 3017 | break; |
| 3018 | } |
| 3019 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3020 | |
| 3021 | dout("handle_cap_flush_ack inode %p mds%d seq %d on %s cleaned %s," |
| 3022 | " flushing %s -> %s\n", |
| 3023 | inode, session->s_mds, seq, ceph_cap_string(dirty), |
| 3024 | ceph_cap_string(cleaned), ceph_cap_string(ci->i_flushing_caps), |
| 3025 | ceph_cap_string(ci->i_flushing_caps & ~cleaned)); |
| 3026 | |
Yan, Zheng | 8310b08 | 2015-06-09 17:20:12 +0800 | [diff] [blame] | 3027 | if (list_empty(&to_remove) && !cleaned) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3028 | goto out; |
| 3029 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3030 | ci->i_flushing_caps &= ~cleaned; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3031 | |
| 3032 | spin_lock(&mdsc->cap_dirty_lock); |
Yan, Zheng | 8310b08 | 2015-06-09 17:20:12 +0800 | [diff] [blame] | 3033 | |
| 3034 | if (!list_empty(&to_remove)) { |
| 3035 | list_for_each_entry(cf, &to_remove, list) |
| 3036 | rb_erase(&cf->g_node, &mdsc->cap_flush_tree); |
| 3037 | |
| 3038 | n = rb_first(&mdsc->cap_flush_tree); |
| 3039 | cf = n ? rb_entry(n, struct ceph_cap_flush, g_node) : NULL; |
| 3040 | if (!cf || cf->tid > flush_tid) |
| 3041 | wake_up_all(&mdsc->cap_flushing_wq); |
| 3042 | } |
| 3043 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3044 | if (ci->i_flushing_caps == 0) { |
| 3045 | list_del_init(&ci->i_flushing_item); |
| 3046 | if (!list_empty(&session->s_cap_flushing)) |
| 3047 | dout(" mds%d still flushing cap on %p\n", |
| 3048 | session->s_mds, |
| 3049 | &list_entry(session->s_cap_flushing.next, |
| 3050 | struct ceph_inode_info, |
| 3051 | i_flushing_item)->vfs_inode); |
| 3052 | mdsc->num_cap_flushing--; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3053 | dout(" inode %p now !flushing\n", inode); |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3054 | |
| 3055 | if (ci->i_dirty_caps == 0) { |
| 3056 | dout(" inode %p now clean\n", inode); |
| 3057 | BUG_ON(!list_empty(&ci->i_dirty_item)); |
| 3058 | drop = 1; |
Yan, Zheng | 5dda377c | 2015-04-30 14:40:54 +0800 | [diff] [blame] | 3059 | if (ci->i_wr_ref == 0 && |
| 3060 | ci->i_wrbuffer_ref_head == 0) { |
Sage Weil | 7d8cb26 | 2010-08-24 08:44:16 -0700 | [diff] [blame] | 3061 | BUG_ON(!ci->i_head_snapc); |
| 3062 | ceph_put_snap_context(ci->i_head_snapc); |
| 3063 | ci->i_head_snapc = NULL; |
| 3064 | } |
Sage Weil | 76e3b39 | 2009-10-15 18:13:53 -0700 | [diff] [blame] | 3065 | } else { |
| 3066 | BUG_ON(list_empty(&ci->i_dirty_item)); |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3067 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3068 | } |
| 3069 | spin_unlock(&mdsc->cap_dirty_lock); |
Yehuda Sadeh | 03066f2 | 2010-07-27 13:11:08 -0700 | [diff] [blame] | 3070 | wake_up_all(&ci->i_cap_wq); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3071 | |
| 3072 | out: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3073 | spin_unlock(&ci->i_ceph_lock); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 3074 | |
| 3075 | while (!list_empty(&to_remove)) { |
| 3076 | cf = list_first_entry(&to_remove, |
| 3077 | struct ceph_cap_flush, list); |
| 3078 | list_del(&cf->list); |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 3079 | ceph_free_cap_flush(cf); |
Yan, Zheng | 553adfd | 2015-06-09 15:48:57 +0800 | [diff] [blame] | 3080 | } |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3081 | if (drop) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3082 | iput(inode); |
| 3083 | } |
| 3084 | |
| 3085 | /* |
| 3086 | * Handle FLUSHSNAP_ACK. MDS has flushed snap data to disk and we can |
| 3087 | * throw away our cap_snap. |
| 3088 | * |
| 3089 | * Caller hold s_mutex. |
| 3090 | */ |
Sage Weil | 6df058c | 2009-12-22 11:24:33 -0800 | [diff] [blame] | 3091 | static void handle_cap_flushsnap_ack(struct inode *inode, u64 flush_tid, |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3092 | struct ceph_mds_caps *m, |
| 3093 | struct ceph_mds_session *session) |
| 3094 | { |
| 3095 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yan, Zheng | affbc19 | 2015-05-05 21:22:13 +0800 | [diff] [blame] | 3096 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3097 | u64 follows = le64_to_cpu(m->snap_follows); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3098 | struct ceph_cap_snap *capsnap; |
| 3099 | int drop = 0; |
| 3100 | |
| 3101 | dout("handle_cap_flushsnap_ack inode %p ci %p mds%d follows %lld\n", |
| 3102 | inode, ci, session->s_mds, follows); |
| 3103 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3104 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3105 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { |
| 3106 | if (capsnap->follows == follows) { |
| 3107 | if (capsnap->flush_tid != flush_tid) { |
| 3108 | dout(" cap_snap %p follows %lld tid %lld !=" |
| 3109 | " %lld\n", capsnap, follows, |
| 3110 | flush_tid, capsnap->flush_tid); |
| 3111 | break; |
| 3112 | } |
| 3113 | WARN_ON(capsnap->dirty_pages || capsnap->writing); |
Sage Weil | 819ccbf | 2010-04-01 09:33:46 -0700 | [diff] [blame] | 3114 | dout(" removing %p cap_snap %p follows %lld\n", |
| 3115 | inode, capsnap, follows); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3116 | ceph_put_snap_context(capsnap->context); |
| 3117 | list_del(&capsnap->ci_item); |
| 3118 | list_del(&capsnap->flushing_item); |
| 3119 | ceph_put_cap_snap(capsnap); |
Yan, Zheng | affbc19 | 2015-05-05 21:22:13 +0800 | [diff] [blame] | 3120 | wake_up_all(&mdsc->cap_flushing_wq); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3121 | drop = 1; |
| 3122 | break; |
| 3123 | } else { |
| 3124 | dout(" skipping cap_snap %p follows %lld\n", |
| 3125 | capsnap, capsnap->follows); |
| 3126 | } |
| 3127 | } |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3128 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3129 | if (drop) |
| 3130 | iput(inode); |
| 3131 | } |
| 3132 | |
| 3133 | /* |
| 3134 | * Handle TRUNC from MDS, indicating file truncation. |
| 3135 | * |
| 3136 | * caller hold s_mutex. |
| 3137 | */ |
| 3138 | static void handle_cap_trunc(struct inode *inode, |
| 3139 | struct ceph_mds_caps *trunc, |
| 3140 | struct ceph_mds_session *session) |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3141 | __releases(ci->i_ceph_lock) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3142 | { |
| 3143 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 3144 | int mds = session->s_mds; |
| 3145 | int seq = le32_to_cpu(trunc->seq); |
| 3146 | u32 truncate_seq = le32_to_cpu(trunc->truncate_seq); |
| 3147 | u64 truncate_size = le64_to_cpu(trunc->truncate_size); |
| 3148 | u64 size = le64_to_cpu(trunc->size); |
| 3149 | int implemented = 0; |
| 3150 | int dirty = __ceph_caps_dirty(ci); |
| 3151 | int issued = __ceph_caps_issued(ceph_inode(inode), &implemented); |
| 3152 | int queue_trunc = 0; |
| 3153 | |
| 3154 | issued |= implemented | dirty; |
| 3155 | |
| 3156 | dout("handle_cap_trunc inode %p mds%d seq %d to %lld seq %d\n", |
| 3157 | inode, mds, seq, truncate_size, truncate_seq); |
| 3158 | queue_trunc = ceph_fill_file_size(inode, issued, |
| 3159 | truncate_seq, truncate_size, size); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3160 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3161 | |
Yan, Zheng | 1464975 | 2016-05-20 15:41:20 +0800 | [diff] [blame] | 3162 | if (queue_trunc) |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 3163 | ceph_queue_vmtruncate(inode); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3164 | } |
| 3165 | |
| 3166 | /* |
| 3167 | * Handle EXPORT from MDS. Cap is being migrated _from_ this mds to a |
| 3168 | * different one. If we are the most recent migration we've seen (as |
| 3169 | * indicated by mseq), make note of the migrating cap bits for the |
| 3170 | * duration (until we see the corresponding IMPORT). |
| 3171 | * |
| 3172 | * caller holds s_mutex |
| 3173 | */ |
| 3174 | static void handle_cap_export(struct inode *inode, struct ceph_mds_caps *ex, |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3175 | struct ceph_mds_cap_peer *ph, |
| 3176 | struct ceph_mds_session *session) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3177 | { |
Sage Weil | db35405 | 2011-05-24 11:46:31 -0700 | [diff] [blame] | 3178 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3179 | struct ceph_mds_session *tsession = NULL; |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 3180 | struct ceph_cap *cap, *tcap, *new_cap = NULL; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3181 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3182 | u64 t_cap_id; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3183 | unsigned mseq = le32_to_cpu(ex->migrate_seq); |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3184 | unsigned t_seq, t_mseq; |
| 3185 | int target, issued; |
| 3186 | int mds = session->s_mds; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3187 | |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3188 | if (ph) { |
| 3189 | t_cap_id = le64_to_cpu(ph->cap_id); |
| 3190 | t_seq = le32_to_cpu(ph->seq); |
| 3191 | t_mseq = le32_to_cpu(ph->mseq); |
| 3192 | target = le32_to_cpu(ph->mds); |
| 3193 | } else { |
| 3194 | t_cap_id = t_seq = t_mseq = 0; |
| 3195 | target = -1; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3196 | } |
| 3197 | |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3198 | dout("handle_cap_export inode %p ci %p mds%d mseq %d target %d\n", |
| 3199 | inode, ci, mds, mseq, target); |
| 3200 | retry: |
| 3201 | spin_lock(&ci->i_ceph_lock); |
| 3202 | cap = __get_cap_for_mds(ci, mds); |
Yan, Zheng | ca665e0 | 2014-04-21 15:46:37 +0800 | [diff] [blame] | 3203 | if (!cap || cap->cap_id != le64_to_cpu(ex->cap_id)) |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3204 | goto out_unlock; |
Sage Weil | 154f42c | 2010-06-21 13:45:04 -0700 | [diff] [blame] | 3205 | |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3206 | if (target < 0) { |
| 3207 | __ceph_remove_cap(cap, false); |
Yan, Zheng | 7731032 | 2016-04-08 15:27:16 +0800 | [diff] [blame] | 3208 | if (!ci->i_auth_cap) |
| 3209 | ci->i_ceph_flags |= CEPH_I_CAP_DROPPED; |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3210 | goto out_unlock; |
| 3211 | } |
Sage Weil | db35405 | 2011-05-24 11:46:31 -0700 | [diff] [blame] | 3212 | |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3213 | /* |
| 3214 | * now we know we haven't received the cap import message yet |
| 3215 | * because the exported cap still exist. |
| 3216 | */ |
| 3217 | |
| 3218 | issued = cap->issued; |
| 3219 | WARN_ON(issued != cap->implemented); |
| 3220 | |
| 3221 | tcap = __get_cap_for_mds(ci, target); |
| 3222 | if (tcap) { |
| 3223 | /* already have caps from the target */ |
| 3224 | if (tcap->cap_id != t_cap_id || |
| 3225 | ceph_seq_cmp(tcap->seq, t_seq) < 0) { |
| 3226 | dout(" updating import cap %p mds%d\n", tcap, target); |
| 3227 | tcap->cap_id = t_cap_id; |
| 3228 | tcap->seq = t_seq - 1; |
| 3229 | tcap->issue_seq = t_seq - 1; |
| 3230 | tcap->mseq = t_mseq; |
| 3231 | tcap->issued |= issued; |
| 3232 | tcap->implemented |= issued; |
| 3233 | if (cap == ci->i_auth_cap) |
| 3234 | ci->i_auth_cap = tcap; |
| 3235 | if (ci->i_flushing_caps && ci->i_auth_cap == tcap) { |
| 3236 | spin_lock(&mdsc->cap_dirty_lock); |
| 3237 | list_move_tail(&ci->i_flushing_item, |
| 3238 | &tcap->session->s_cap_flushing); |
| 3239 | spin_unlock(&mdsc->cap_dirty_lock); |
Sage Weil | db35405 | 2011-05-24 11:46:31 -0700 | [diff] [blame] | 3240 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3241 | } |
Yan, Zheng | a096b09 | 2013-09-22 10:15:58 +0800 | [diff] [blame] | 3242 | __ceph_remove_cap(cap, false); |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3243 | goto out_unlock; |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 3244 | } else if (tsession) { |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3245 | /* add placeholder for the export tagert */ |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 3246 | int flag = (cap == ci->i_auth_cap) ? CEPH_CAP_FLAG_AUTH : 0; |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3247 | ceph_add_cap(inode, tsession, t_cap_id, -1, issued, 0, |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 3248 | t_seq - 1, t_mseq, (u64)-1, flag, &new_cap); |
| 3249 | |
| 3250 | __ceph_remove_cap(cap, false); |
| 3251 | goto out_unlock; |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3252 | } |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3253 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3254 | spin_unlock(&ci->i_ceph_lock); |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3255 | mutex_unlock(&session->s_mutex); |
| 3256 | |
| 3257 | /* open target session */ |
| 3258 | tsession = ceph_mdsc_open_export_target_session(mdsc, target); |
| 3259 | if (!IS_ERR(tsession)) { |
| 3260 | if (mds > target) { |
| 3261 | mutex_lock(&session->s_mutex); |
| 3262 | mutex_lock_nested(&tsession->s_mutex, |
| 3263 | SINGLE_DEPTH_NESTING); |
| 3264 | } else { |
| 3265 | mutex_lock(&tsession->s_mutex); |
| 3266 | mutex_lock_nested(&session->s_mutex, |
| 3267 | SINGLE_DEPTH_NESTING); |
| 3268 | } |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 3269 | new_cap = ceph_get_cap(mdsc, NULL); |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3270 | } else { |
| 3271 | WARN_ON(1); |
| 3272 | tsession = NULL; |
| 3273 | target = -1; |
| 3274 | } |
| 3275 | goto retry; |
| 3276 | |
| 3277 | out_unlock: |
| 3278 | spin_unlock(&ci->i_ceph_lock); |
| 3279 | mutex_unlock(&session->s_mutex); |
| 3280 | if (tsession) { |
| 3281 | mutex_unlock(&tsession->s_mutex); |
| 3282 | ceph_put_mds_session(tsession); |
| 3283 | } |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 3284 | if (new_cap) |
| 3285 | ceph_put_cap(mdsc, new_cap); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3286 | } |
| 3287 | |
| 3288 | /* |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3289 | * Handle cap IMPORT. |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3290 | * |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3291 | * caller holds s_mutex. acquires i_ceph_lock |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3292 | */ |
| 3293 | static void handle_cap_import(struct ceph_mds_client *mdsc, |
| 3294 | struct inode *inode, struct ceph_mds_caps *im, |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3295 | struct ceph_mds_cap_peer *ph, |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3296 | struct ceph_mds_session *session, |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3297 | struct ceph_cap **target_cap, int *old_issued) |
| 3298 | __acquires(ci->i_ceph_lock) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3299 | { |
| 3300 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3301 | struct ceph_cap *cap, *ocap, *new_cap = NULL; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3302 | int mds = session->s_mds; |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3303 | int issued; |
| 3304 | unsigned caps = le32_to_cpu(im->caps); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3305 | unsigned wanted = le32_to_cpu(im->wanted); |
| 3306 | unsigned seq = le32_to_cpu(im->seq); |
| 3307 | unsigned mseq = le32_to_cpu(im->migrate_seq); |
| 3308 | u64 realmino = le64_to_cpu(im->realm); |
| 3309 | u64 cap_id = le64_to_cpu(im->cap_id); |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3310 | u64 p_cap_id; |
| 3311 | int peer; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3312 | |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3313 | if (ph) { |
| 3314 | p_cap_id = le64_to_cpu(ph->cap_id); |
| 3315 | peer = le32_to_cpu(ph->mds); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3316 | } else { |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3317 | p_cap_id = 0; |
| 3318 | peer = -1; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3319 | } |
| 3320 | |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3321 | dout("handle_cap_import inode %p ci %p mds%d mseq %d peer %d\n", |
| 3322 | inode, ci, mds, mseq, peer); |
| 3323 | |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 3324 | retry: |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3325 | spin_lock(&ci->i_ceph_lock); |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 3326 | cap = __get_cap_for_mds(ci, mds); |
| 3327 | if (!cap) { |
| 3328 | if (!new_cap) { |
| 3329 | spin_unlock(&ci->i_ceph_lock); |
| 3330 | new_cap = ceph_get_cap(mdsc, NULL); |
| 3331 | goto retry; |
| 3332 | } |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3333 | cap = new_cap; |
| 3334 | } else { |
| 3335 | if (new_cap) { |
| 3336 | ceph_put_cap(mdsc, new_cap); |
| 3337 | new_cap = NULL; |
| 3338 | } |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 3339 | } |
| 3340 | |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3341 | __ceph_caps_issued(ci, &issued); |
| 3342 | issued |= __ceph_caps_dirty(ci); |
| 3343 | |
| 3344 | ceph_add_cap(inode, session, cap_id, -1, caps, wanted, seq, mseq, |
Yan, Zheng | d9df278 | 2014-04-18 09:57:11 +0800 | [diff] [blame] | 3345 | realmino, CEPH_CAP_FLAG_AUTH, &new_cap); |
| 3346 | |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3347 | ocap = peer >= 0 ? __get_cap_for_mds(ci, peer) : NULL; |
| 3348 | if (ocap && ocap->cap_id == p_cap_id) { |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3349 | dout(" remove export cap %p mds%d flags %d\n", |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3350 | ocap, peer, ph->flags); |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3351 | if ((ph->flags & CEPH_CAP_FLAG_AUTH) && |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3352 | (ocap->seq != le32_to_cpu(ph->seq) || |
| 3353 | ocap->mseq != le32_to_cpu(ph->mseq))) { |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3354 | pr_err("handle_cap_import: mismatched seq/mseq: " |
| 3355 | "ino (%llx.%llx) mds%d seq %d mseq %d " |
| 3356 | "importer mds%d has peer seq %d mseq %d\n", |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3357 | ceph_vinop(inode), peer, ocap->seq, |
| 3358 | ocap->mseq, mds, le32_to_cpu(ph->seq), |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3359 | le32_to_cpu(ph->mseq)); |
| 3360 | } |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3361 | __ceph_remove_cap(ocap, (ph->flags & CEPH_CAP_FLAG_RELEASE)); |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3362 | } |
| 3363 | |
| 3364 | /* make sure we re-request max_size, if necessary */ |
| 3365 | ci->i_wanted_max_size = 0; |
| 3366 | ci->i_requested_max_size = 0; |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3367 | |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3368 | *old_issued = issued; |
| 3369 | *target_cap = cap; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3370 | } |
| 3371 | |
| 3372 | /* |
| 3373 | * Handle a caps message from the MDS. |
| 3374 | * |
| 3375 | * Identify the appropriate session, inode, and call the right handler |
| 3376 | * based on the cap op. |
| 3377 | */ |
| 3378 | void ceph_handle_caps(struct ceph_mds_session *session, |
| 3379 | struct ceph_msg *msg) |
| 3380 | { |
| 3381 | struct ceph_mds_client *mdsc = session->s_mdsc; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 3382 | struct super_block *sb = mdsc->fsc->sb; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3383 | struct inode *inode; |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3384 | struct ceph_inode_info *ci; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3385 | struct ceph_cap *cap; |
| 3386 | struct ceph_mds_caps *h; |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3387 | struct ceph_mds_cap_peer *peer = NULL; |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 3388 | struct ceph_snap_realm *realm = NULL; |
| 3389 | struct ceph_string *pool_ns = NULL; |
Sage Weil | 2600d2d | 2010-02-22 15:12:16 -0800 | [diff] [blame] | 3390 | int mds = session->s_mds; |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3391 | int op, issued; |
Sage Weil | 3d7ded4 | 2010-06-09 16:47:10 -0700 | [diff] [blame] | 3392 | u32 seq, mseq; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3393 | struct ceph_vino vino; |
Sage Weil | 6df058c | 2009-12-22 11:24:33 -0800 | [diff] [blame] | 3394 | u64 tid; |
Yan, Zheng | fb01d1f | 2014-11-14 21:29:55 +0800 | [diff] [blame] | 3395 | u64 inline_version = 0; |
| 3396 | void *inline_data = NULL; |
| 3397 | u32 inline_len = 0; |
Sage Weil | 70edb55 | 2010-03-01 13:20:50 -0800 | [diff] [blame] | 3398 | void *snaptrace; |
Sage Weil | ce1fbc8 | 2010-08-02 15:09:39 -0700 | [diff] [blame] | 3399 | size_t snaptrace_len; |
Yan, Zheng | fb01d1f | 2014-11-14 21:29:55 +0800 | [diff] [blame] | 3400 | void *p, *end; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3401 | |
| 3402 | dout("handle_caps from mds%d\n", mds); |
| 3403 | |
| 3404 | /* decode */ |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3405 | end = msg->front.iov_base + msg->front.iov_len; |
Sage Weil | 6df058c | 2009-12-22 11:24:33 -0800 | [diff] [blame] | 3406 | tid = le64_to_cpu(msg->hdr.tid); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3407 | if (msg->front.iov_len < sizeof(*h)) |
| 3408 | goto bad; |
| 3409 | h = msg->front.iov_base; |
| 3410 | op = le32_to_cpu(h->op); |
| 3411 | vino.ino = le64_to_cpu(h->ino); |
| 3412 | vino.snap = CEPH_NOSNAP; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3413 | seq = le32_to_cpu(h->seq); |
Sage Weil | 3d7ded4 | 2010-06-09 16:47:10 -0700 | [diff] [blame] | 3414 | mseq = le32_to_cpu(h->migrate_seq); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3415 | |
Sage Weil | ce1fbc8 | 2010-08-02 15:09:39 -0700 | [diff] [blame] | 3416 | snaptrace = h + 1; |
| 3417 | snaptrace_len = le32_to_cpu(h->snap_trace_len); |
Yan, Zheng | fb01d1f | 2014-11-14 21:29:55 +0800 | [diff] [blame] | 3418 | p = snaptrace + snaptrace_len; |
Sage Weil | ce1fbc8 | 2010-08-02 15:09:39 -0700 | [diff] [blame] | 3419 | |
| 3420 | if (le16_to_cpu(msg->hdr.version) >= 2) { |
Yan, Zheng | fb01d1f | 2014-11-14 21:29:55 +0800 | [diff] [blame] | 3421 | u32 flock_len; |
Sage Weil | ce1fbc8 | 2010-08-02 15:09:39 -0700 | [diff] [blame] | 3422 | ceph_decode_32_safe(&p, end, flock_len, bad); |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3423 | if (p + flock_len > end) |
| 3424 | goto bad; |
Yan, Zheng | fb01d1f | 2014-11-14 21:29:55 +0800 | [diff] [blame] | 3425 | p += flock_len; |
Sage Weil | ce1fbc8 | 2010-08-02 15:09:39 -0700 | [diff] [blame] | 3426 | } |
| 3427 | |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3428 | if (le16_to_cpu(msg->hdr.version) >= 3) { |
| 3429 | if (op == CEPH_CAP_OP_IMPORT) { |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3430 | if (p + sizeof(*peer) > end) |
| 3431 | goto bad; |
| 3432 | peer = p; |
Yan, Zheng | fb01d1f | 2014-11-14 21:29:55 +0800 | [diff] [blame] | 3433 | p += sizeof(*peer); |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3434 | } else if (op == CEPH_CAP_OP_EXPORT) { |
| 3435 | /* recorded in unused fields */ |
| 3436 | peer = (void *)&h->size; |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3437 | } |
| 3438 | } |
| 3439 | |
Yan, Zheng | fb01d1f | 2014-11-14 21:29:55 +0800 | [diff] [blame] | 3440 | if (le16_to_cpu(msg->hdr.version) >= 4) { |
| 3441 | ceph_decode_64_safe(&p, end, inline_version, bad); |
| 3442 | ceph_decode_32_safe(&p, end, inline_len, bad); |
| 3443 | if (p + inline_len > end) |
| 3444 | goto bad; |
| 3445 | inline_data = p; |
| 3446 | p += inline_len; |
| 3447 | } |
| 3448 | |
Yan, Zheng | 5ea5c5e | 2016-02-14 18:06:41 +0800 | [diff] [blame] | 3449 | if (le16_to_cpu(msg->hdr.version) >= 8) { |
| 3450 | u64 flush_tid; |
| 3451 | u32 caller_uid, caller_gid; |
| 3452 | u32 osd_epoch_barrier; |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 3453 | u32 pool_ns_len; |
Yan, Zheng | 5ea5c5e | 2016-02-14 18:06:41 +0800 | [diff] [blame] | 3454 | /* version >= 5 */ |
| 3455 | ceph_decode_32_safe(&p, end, osd_epoch_barrier, bad); |
| 3456 | /* version >= 6 */ |
| 3457 | ceph_decode_64_safe(&p, end, flush_tid, bad); |
| 3458 | /* version >= 7 */ |
| 3459 | ceph_decode_32_safe(&p, end, caller_uid, bad); |
| 3460 | ceph_decode_32_safe(&p, end, caller_gid, bad); |
| 3461 | /* version >= 8 */ |
| 3462 | ceph_decode_32_safe(&p, end, pool_ns_len, bad); |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 3463 | if (pool_ns_len > 0) { |
| 3464 | ceph_decode_need(&p, end, pool_ns_len, bad); |
| 3465 | pool_ns = ceph_find_or_create_string(p, pool_ns_len); |
| 3466 | p += pool_ns_len; |
| 3467 | } |
Yan, Zheng | 5ea5c5e | 2016-02-14 18:06:41 +0800 | [diff] [blame] | 3468 | } |
| 3469 | |
Yan, Zheng | 6cd3bca | 2014-09-17 07:45:12 +0800 | [diff] [blame] | 3470 | /* lookup ino */ |
| 3471 | inode = ceph_find_inode(sb, vino); |
| 3472 | ci = ceph_inode(inode); |
| 3473 | dout(" op %s ino %llx.%llx inode %p\n", ceph_cap_op_name(op), vino.ino, |
| 3474 | vino.snap, inode); |
| 3475 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3476 | mutex_lock(&session->s_mutex); |
| 3477 | session->s_seq++; |
| 3478 | dout(" mds%d seq %lld cap seq %u\n", session->s_mds, session->s_seq, |
| 3479 | (unsigned)seq); |
| 3480 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3481 | if (!inode) { |
| 3482 | dout(" i don't have ino %llx\n", vino.ino); |
Sage Weil | 3d7ded4 | 2010-06-09 16:47:10 -0700 | [diff] [blame] | 3483 | |
Yan, Zheng | a096b09 | 2013-09-22 10:15:58 +0800 | [diff] [blame] | 3484 | if (op == CEPH_CAP_OP_IMPORT) { |
Yan, Zheng | 745a8e3 | 2015-05-14 17:22:42 +0800 | [diff] [blame] | 3485 | cap = ceph_get_cap(mdsc, NULL); |
| 3486 | cap->cap_ino = vino.ino; |
| 3487 | cap->queue_release = 1; |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 3488 | cap->cap_id = le64_to_cpu(h->cap_id); |
Yan, Zheng | 745a8e3 | 2015-05-14 17:22:42 +0800 | [diff] [blame] | 3489 | cap->mseq = mseq; |
| 3490 | cap->seq = seq; |
Yan, Zheng | a096b09 | 2013-09-22 10:15:58 +0800 | [diff] [blame] | 3491 | spin_lock(&session->s_cap_lock); |
Yan, Zheng | 745a8e3 | 2015-05-14 17:22:42 +0800 | [diff] [blame] | 3492 | list_add_tail(&cap->session_caps, |
| 3493 | &session->s_cap_releases); |
| 3494 | session->s_num_cap_releases++; |
Yan, Zheng | a096b09 | 2013-09-22 10:15:58 +0800 | [diff] [blame] | 3495 | spin_unlock(&session->s_cap_lock); |
| 3496 | } |
Greg Farnum | 21b559d | 2010-10-06 15:46:30 -0700 | [diff] [blame] | 3497 | goto flush_cap_releases; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3498 | } |
| 3499 | |
| 3500 | /* these will work even if we don't have a cap yet */ |
| 3501 | switch (op) { |
| 3502 | case CEPH_CAP_OP_FLUSHSNAP_ACK: |
Sage Weil | 6df058c | 2009-12-22 11:24:33 -0800 | [diff] [blame] | 3503 | handle_cap_flushsnap_ack(inode, tid, h, session); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3504 | goto done; |
| 3505 | |
| 3506 | case CEPH_CAP_OP_EXPORT: |
Yan, Zheng | 11df2df | 2013-11-24 14:44:38 +0800 | [diff] [blame] | 3507 | handle_cap_export(inode, h, peer, session); |
| 3508 | goto done_unlocked; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3509 | |
| 3510 | case CEPH_CAP_OP_IMPORT: |
Yan, Zheng | 982d601 | 2014-12-23 15:30:54 +0800 | [diff] [blame] | 3511 | realm = NULL; |
| 3512 | if (snaptrace_len) { |
| 3513 | down_write(&mdsc->snap_rwsem); |
| 3514 | ceph_update_snap_trace(mdsc, snaptrace, |
| 3515 | snaptrace + snaptrace_len, |
| 3516 | false, &realm); |
| 3517 | downgrade_write(&mdsc->snap_rwsem); |
| 3518 | } else { |
| 3519 | down_read(&mdsc->snap_rwsem); |
| 3520 | } |
Yan, Zheng | 4ee6a91 | 2013-11-24 14:43:46 +0800 | [diff] [blame] | 3521 | handle_cap_import(mdsc, inode, h, peer, session, |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3522 | &cap, &issued); |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 3523 | handle_cap_grant(mdsc, inode, h, &pool_ns, |
Yan, Zheng | fb01d1f | 2014-11-14 21:29:55 +0800 | [diff] [blame] | 3524 | inline_version, inline_data, inline_len, |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 3525 | msg->middle, session, cap, issued); |
Yan, Zheng | 982d601 | 2014-12-23 15:30:54 +0800 | [diff] [blame] | 3526 | if (realm) |
| 3527 | ceph_put_snap_realm(mdsc, realm); |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3528 | goto done_unlocked; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3529 | } |
| 3530 | |
| 3531 | /* the rest require a cap */ |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3532 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3533 | cap = __get_cap_for_mds(ceph_inode(inode), mds); |
| 3534 | if (!cap) { |
Sage Weil | 9dbd412 | 2010-06-10 13:21:20 -0700 | [diff] [blame] | 3535 | dout(" no cap on %p ino %llx.%llx from mds%d\n", |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3536 | inode, ceph_ino(inode), ceph_snap(inode), mds); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3537 | spin_unlock(&ci->i_ceph_lock); |
Greg Farnum | 21b559d | 2010-10-06 15:46:30 -0700 | [diff] [blame] | 3538 | goto flush_cap_releases; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3539 | } |
| 3540 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3541 | /* note that each of these drops i_ceph_lock for us */ |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3542 | switch (op) { |
| 3543 | case CEPH_CAP_OP_REVOKE: |
| 3544 | case CEPH_CAP_OP_GRANT: |
Yan, Zheng | 2cd698b | 2014-04-18 13:20:27 +0800 | [diff] [blame] | 3545 | __ceph_caps_issued(ci, &issued); |
| 3546 | issued |= __ceph_caps_dirty(ci); |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 3547 | handle_cap_grant(mdsc, inode, h, &pool_ns, |
Yan, Zheng | fb01d1f | 2014-11-14 21:29:55 +0800 | [diff] [blame] | 3548 | inline_version, inline_data, inline_len, |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 3549 | msg->middle, session, cap, issued); |
Sage Weil | 15637c8 | 2010-03-16 13:42:00 -0700 | [diff] [blame] | 3550 | goto done_unlocked; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3551 | |
| 3552 | case CEPH_CAP_OP_FLUSH_ACK: |
Sage Weil | 6df058c | 2009-12-22 11:24:33 -0800 | [diff] [blame] | 3553 | handle_cap_flush_ack(inode, tid, h, session, cap); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3554 | break; |
| 3555 | |
| 3556 | case CEPH_CAP_OP_TRUNC: |
| 3557 | handle_cap_trunc(inode, h, session); |
| 3558 | break; |
| 3559 | |
| 3560 | default: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3561 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3562 | pr_err("ceph_handle_caps: unknown cap op %d %s\n", op, |
| 3563 | ceph_cap_op_name(op)); |
| 3564 | } |
| 3565 | |
Greg Farnum | 21b559d | 2010-10-06 15:46:30 -0700 | [diff] [blame] | 3566 | goto done; |
| 3567 | |
| 3568 | flush_cap_releases: |
| 3569 | /* |
Yan, Zheng | 745a8e3 | 2015-05-14 17:22:42 +0800 | [diff] [blame] | 3570 | * send any cap release message to try to move things |
Greg Farnum | 21b559d | 2010-10-06 15:46:30 -0700 | [diff] [blame] | 3571 | * along for the mds (who clearly thinks we still have this |
| 3572 | * cap). |
| 3573 | */ |
Greg Farnum | 21b559d | 2010-10-06 15:46:30 -0700 | [diff] [blame] | 3574 | ceph_send_cap_releases(mdsc, session); |
| 3575 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3576 | done: |
Sage Weil | 15637c8 | 2010-03-16 13:42:00 -0700 | [diff] [blame] | 3577 | mutex_unlock(&session->s_mutex); |
| 3578 | done_unlocked: |
SF Markus Elfring | e96a650 | 2014-11-02 15:20:59 +0100 | [diff] [blame] | 3579 | iput(inode); |
Yan, Zheng | 779fe0f | 2016-03-07 09:35:06 +0800 | [diff] [blame] | 3580 | ceph_put_string(pool_ns); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3581 | return; |
| 3582 | |
| 3583 | bad: |
| 3584 | pr_err("ceph_handle_caps: corrupt message\n"); |
Sage Weil | 9ec7cab | 2009-12-14 15:13:47 -0800 | [diff] [blame] | 3585 | ceph_msg_dump(msg); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3586 | return; |
| 3587 | } |
| 3588 | |
| 3589 | /* |
| 3590 | * Delayed work handler to process end of delayed cap release LRU list. |
| 3591 | */ |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3592 | void ceph_check_delayed_caps(struct ceph_mds_client *mdsc) |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3593 | { |
| 3594 | struct ceph_inode_info *ci; |
| 3595 | int flags = CHECK_CAPS_NODELAY; |
| 3596 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3597 | dout("check_delayed_caps\n"); |
| 3598 | while (1) { |
| 3599 | spin_lock(&mdsc->cap_delay_lock); |
| 3600 | if (list_empty(&mdsc->cap_delay_list)) |
| 3601 | break; |
| 3602 | ci = list_first_entry(&mdsc->cap_delay_list, |
| 3603 | struct ceph_inode_info, |
| 3604 | i_cap_delay_list); |
| 3605 | if ((ci->i_ceph_flags & CEPH_I_FLUSH) == 0 && |
| 3606 | time_before(jiffies, ci->i_hold_caps_max)) |
| 3607 | break; |
| 3608 | list_del_init(&ci->i_cap_delay_list); |
| 3609 | spin_unlock(&mdsc->cap_delay_lock); |
| 3610 | dout("check_delayed_caps on %p\n", &ci->vfs_inode); |
| 3611 | ceph_check_caps(ci, flags, NULL); |
| 3612 | } |
| 3613 | spin_unlock(&mdsc->cap_delay_lock); |
| 3614 | } |
| 3615 | |
| 3616 | /* |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3617 | * Flush all dirty caps to the mds |
| 3618 | */ |
| 3619 | void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc) |
| 3620 | { |
Sage Weil | db35405 | 2011-05-24 11:46:31 -0700 | [diff] [blame] | 3621 | struct ceph_inode_info *ci; |
| 3622 | struct inode *inode; |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3623 | |
| 3624 | dout("flush_dirty_caps\n"); |
| 3625 | spin_lock(&mdsc->cap_dirty_lock); |
Sage Weil | db35405 | 2011-05-24 11:46:31 -0700 | [diff] [blame] | 3626 | while (!list_empty(&mdsc->cap_dirty)) { |
| 3627 | ci = list_first_entry(&mdsc->cap_dirty, struct ceph_inode_info, |
| 3628 | i_dirty_item); |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 3629 | inode = &ci->vfs_inode; |
| 3630 | ihold(inode); |
Sage Weil | db35405 | 2011-05-24 11:46:31 -0700 | [diff] [blame] | 3631 | dout("flush_dirty_caps %p\n", inode); |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3632 | spin_unlock(&mdsc->cap_dirty_lock); |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 3633 | ceph_check_caps(ci, CHECK_CAPS_NODELAY|CHECK_CAPS_FLUSH, NULL); |
| 3634 | iput(inode); |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3635 | spin_lock(&mdsc->cap_dirty_lock); |
| 3636 | } |
| 3637 | spin_unlock(&mdsc->cap_dirty_lock); |
Sage Weil | db35405 | 2011-05-24 11:46:31 -0700 | [diff] [blame] | 3638 | dout("flush_dirty_caps done\n"); |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3639 | } |
| 3640 | |
Yan, Zheng | 774a6a1 | 2016-06-06 16:01:39 +0800 | [diff] [blame] | 3641 | void __ceph_get_fmode(struct ceph_inode_info *ci, int fmode) |
| 3642 | { |
| 3643 | int i; |
| 3644 | int bits = (fmode << 1) | 1; |
| 3645 | for (i = 0; i < CEPH_FILE_MODE_BITS; i++) { |
| 3646 | if (bits & (1 << i)) |
| 3647 | ci->i_nr_by_mode[i]++; |
| 3648 | } |
| 3649 | } |
| 3650 | |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 3651 | /* |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3652 | * Drop open file reference. If we were the last open file, |
| 3653 | * we may need to release capabilities to the MDS (or schedule |
| 3654 | * their delayed release). |
| 3655 | */ |
| 3656 | void ceph_put_fmode(struct ceph_inode_info *ci, int fmode) |
| 3657 | { |
Yan, Zheng | 774a6a1 | 2016-06-06 16:01:39 +0800 | [diff] [blame] | 3658 | int i, last = 0; |
| 3659 | int bits = (fmode << 1) | 1; |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3660 | spin_lock(&ci->i_ceph_lock); |
Yan, Zheng | 774a6a1 | 2016-06-06 16:01:39 +0800 | [diff] [blame] | 3661 | for (i = 0; i < CEPH_FILE_MODE_BITS; i++) { |
| 3662 | if (bits & (1 << i)) { |
| 3663 | BUG_ON(ci->i_nr_by_mode[i] == 0); |
| 3664 | if (--ci->i_nr_by_mode[i] == 0) |
| 3665 | last++; |
| 3666 | } |
| 3667 | } |
| 3668 | dout("put_fmode %p fmode %d {%d,%d,%d,%d}\n", |
| 3669 | &ci->vfs_inode, fmode, |
| 3670 | ci->i_nr_by_mode[0], ci->i_nr_by_mode[1], |
| 3671 | ci->i_nr_by_mode[2], ci->i_nr_by_mode[3]); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3672 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3673 | |
| 3674 | if (last && ci->i_vino.snap == CEPH_NOSNAP) |
| 3675 | ceph_check_caps(ci, 0, NULL); |
| 3676 | } |
| 3677 | |
| 3678 | /* |
| 3679 | * Helpers for embedding cap and dentry lease releases into mds |
| 3680 | * requests. |
| 3681 | * |
| 3682 | * @force is used by dentry_release (below) to force inclusion of a |
| 3683 | * record for the directory inode, even when there aren't any caps to |
| 3684 | * drop. |
| 3685 | */ |
| 3686 | int ceph_encode_inode_release(void **p, struct inode *inode, |
| 3687 | int mds, int drop, int unless, int force) |
| 3688 | { |
| 3689 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 3690 | struct ceph_cap *cap; |
| 3691 | struct ceph_mds_request_release *rel = *p; |
Sage Weil | ec97f88 | 2010-06-24 15:12:37 -0700 | [diff] [blame] | 3692 | int used, dirty; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3693 | int ret = 0; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3694 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3695 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 916623d | 2010-03-16 15:01:07 -0700 | [diff] [blame] | 3696 | used = __ceph_caps_used(ci); |
Sage Weil | ec97f88 | 2010-06-24 15:12:37 -0700 | [diff] [blame] | 3697 | dirty = __ceph_caps_dirty(ci); |
Sage Weil | 916623d | 2010-03-16 15:01:07 -0700 | [diff] [blame] | 3698 | |
Sage Weil | ec97f88 | 2010-06-24 15:12:37 -0700 | [diff] [blame] | 3699 | dout("encode_inode_release %p mds%d used|dirty %s drop %s unless %s\n", |
| 3700 | inode, mds, ceph_cap_string(used|dirty), ceph_cap_string(drop), |
Sage Weil | 916623d | 2010-03-16 15:01:07 -0700 | [diff] [blame] | 3701 | ceph_cap_string(unless)); |
| 3702 | |
Sage Weil | ec97f88 | 2010-06-24 15:12:37 -0700 | [diff] [blame] | 3703 | /* only drop unused, clean caps */ |
| 3704 | drop &= ~(used | dirty); |
Sage Weil | 916623d | 2010-03-16 15:01:07 -0700 | [diff] [blame] | 3705 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3706 | cap = __get_cap_for_mds(ci, mds); |
| 3707 | if (cap && __cap_is_valid(cap)) { |
| 3708 | if (force || |
| 3709 | ((cap->issued & drop) && |
| 3710 | (cap->issued & unless) == 0)) { |
| 3711 | if ((cap->issued & drop) && |
| 3712 | (cap->issued & unless) == 0) { |
Yan, Zheng | bb137f8 | 2013-06-03 18:22:17 +0800 | [diff] [blame] | 3713 | int wanted = __ceph_caps_wanted(ci); |
| 3714 | if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0) |
| 3715 | wanted |= cap->mds_wanted; |
| 3716 | dout("encode_inode_release %p cap %p " |
| 3717 | "%s -> %s, wanted %s -> %s\n", inode, cap, |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3718 | ceph_cap_string(cap->issued), |
Yan, Zheng | bb137f8 | 2013-06-03 18:22:17 +0800 | [diff] [blame] | 3719 | ceph_cap_string(cap->issued & ~drop), |
| 3720 | ceph_cap_string(cap->mds_wanted), |
| 3721 | ceph_cap_string(wanted)); |
| 3722 | |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3723 | cap->issued &= ~drop; |
| 3724 | cap->implemented &= ~drop; |
Yan, Zheng | bb137f8 | 2013-06-03 18:22:17 +0800 | [diff] [blame] | 3725 | cap->mds_wanted = wanted; |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3726 | } else { |
| 3727 | dout("encode_inode_release %p cap %p %s" |
| 3728 | " (force)\n", inode, cap, |
| 3729 | ceph_cap_string(cap->issued)); |
| 3730 | } |
| 3731 | |
| 3732 | rel->ino = cpu_to_le64(ceph_ino(inode)); |
| 3733 | rel->cap_id = cpu_to_le64(cap->cap_id); |
| 3734 | rel->seq = cpu_to_le32(cap->seq); |
Himangi Saraogi | 08a0f24 | 2014-07-23 20:11:11 +0530 | [diff] [blame] | 3735 | rel->issue_seq = cpu_to_le32(cap->issue_seq); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3736 | rel->mseq = cpu_to_le32(cap->mseq); |
Yan, Zheng | fd7b95c | 2014-04-17 08:02:02 +0800 | [diff] [blame] | 3737 | rel->caps = cpu_to_le32(cap->implemented); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3738 | rel->wanted = cpu_to_le32(cap->mds_wanted); |
| 3739 | rel->dname_len = 0; |
| 3740 | rel->dname_seq = 0; |
| 3741 | *p += sizeof(*rel); |
| 3742 | ret = 1; |
| 3743 | } else { |
| 3744 | dout("encode_inode_release %p cap %p %s\n", |
| 3745 | inode, cap, ceph_cap_string(cap->issued)); |
| 3746 | } |
| 3747 | } |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3748 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3749 | return ret; |
| 3750 | } |
| 3751 | |
| 3752 | int ceph_encode_dentry_release(void **p, struct dentry *dentry, |
| 3753 | int mds, int drop, int unless) |
| 3754 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 3755 | struct inode *dir = d_inode(dentry->d_parent); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3756 | struct ceph_mds_request_release *rel = *p; |
| 3757 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
| 3758 | int force = 0; |
| 3759 | int ret; |
| 3760 | |
| 3761 | /* |
| 3762 | * force an record for the directory caps if we have a dentry lease. |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 3763 | * this is racy (can't take i_ceph_lock and d_lock together), but it |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3764 | * doesn't have to be perfect; the mds will revoke anything we don't |
| 3765 | * release. |
| 3766 | */ |
| 3767 | spin_lock(&dentry->d_lock); |
| 3768 | if (di->lease_session && di->lease_session->s_mds == mds) |
| 3769 | force = 1; |
| 3770 | spin_unlock(&dentry->d_lock); |
| 3771 | |
| 3772 | ret = ceph_encode_inode_release(p, dir, mds, drop, unless, force); |
| 3773 | |
| 3774 | spin_lock(&dentry->d_lock); |
| 3775 | if (ret && di->lease_session && di->lease_session->s_mds == mds) { |
| 3776 | dout("encode_dentry_release %p mds%d seq %d\n", |
| 3777 | dentry, mds, (int)di->lease_seq); |
| 3778 | rel->dname_len = cpu_to_le32(dentry->d_name.len); |
| 3779 | memcpy(*p, dentry->d_name.name, dentry->d_name.len); |
| 3780 | *p += dentry->d_name.len; |
| 3781 | rel->dname_seq = cpu_to_le32(di->lease_seq); |
Sage Weil | 1dadcce | 2010-07-23 13:54:21 -0700 | [diff] [blame] | 3782 | __ceph_mdsc_drop_dentry_lease(dentry); |
Sage Weil | a8599bd | 2009-10-06 11:31:12 -0700 | [diff] [blame] | 3783 | } |
| 3784 | spin_unlock(&dentry->d_lock); |
| 3785 | return ret; |
| 3786 | } |