Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * NFS exporting and validation. |
| 3 | * |
| 4 | * We maintain a list of clients, each of which has a list of |
| 5 | * exports. To export an fs to a given client, you first have |
| 6 | * to create the client entry with NFSCTL_ADDCLIENT, which |
| 7 | * creates a client control block and adds it to the hash |
| 8 | * table. Then, you call NFSCTL_EXPORT for each fs. |
| 9 | * |
| 10 | * |
| 11 | * Copyright (C) 1995, 1996 Olaf Kirch, <okir@monad.swb.de> |
| 12 | */ |
| 13 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 14 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/namei.h> |
Bruce Allan | f35279d | 2005-09-06 15:17:08 -0700 | [diff] [blame] | 16 | #include <linux/module.h> |
Christoph Hellwig | a569425 | 2007-07-17 04:04:28 -0700 | [diff] [blame] | 17 | #include <linux/exportfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/nfsd/syscall.h> |
Aurélien Charbon | f15364b | 2008-01-18 15:50:56 +0100 | [diff] [blame] | 20 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 22 | #include "nfsd.h" |
J. Bruce Fields | 1557aca | 2009-12-04 19:36:06 -0500 | [diff] [blame] | 23 | #include "nfsfh.h" |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #define NFSDDBG_FACILITY NFSDDBG_EXPORT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | typedef struct auth_domain svc_client; |
| 28 | typedef struct svc_export svc_export; |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | /* |
| 31 | * We have two caches. |
| 32 | * One maps client+vfsmnt+dentry to export options - the export map |
| 33 | * The other maps client+filehandle-fragment to export options. - the expkey map |
| 34 | * |
| 35 | * The export options are actually stored in the first map, and the |
| 36 | * second map contains a reference to the entry in the first map. |
| 37 | */ |
| 38 | |
| 39 | #define EXPKEY_HASHBITS 8 |
| 40 | #define EXPKEY_HASHMAX (1 << EXPKEY_HASHBITS) |
| 41 | #define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1) |
| 42 | static struct cache_head *expkey_table[EXPKEY_HASHMAX]; |
| 43 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 44 | static void expkey_put(struct kref *ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | { |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 46 | struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref); |
| 47 | |
| 48 | if (test_bit(CACHE_VALID, &key->h.flags) && |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 49 | !test_bit(CACHE_NEGATIVE, &key->h.flags)) |
| 50 | path_put(&key->ek_path); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 51 | auth_domain_put(key->ek_client); |
| 52 | kfree(key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | static void expkey_request(struct cache_detail *cd, |
| 56 | struct cache_head *h, |
| 57 | char **bpp, int *blen) |
| 58 | { |
| 59 | /* client fsidtype \xfsid */ |
| 60 | struct svc_expkey *ek = container_of(h, struct svc_expkey, h); |
| 61 | char type[5]; |
| 62 | |
| 63 | qword_add(bpp, blen, ek->ek_client->name); |
| 64 | snprintf(type, 5, "%d", ek->ek_fsidtype); |
| 65 | qword_add(bpp, blen, type); |
| 66 | qword_addhex(bpp, blen, (char*)ek->ek_fsid, key_len(ek->ek_fsidtype)); |
| 67 | (*bpp)[-1] = '\n'; |
| 68 | } |
| 69 | |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 70 | static int expkey_upcall(struct cache_detail *cd, struct cache_head *h) |
| 71 | { |
| 72 | return sunrpc_cache_pipe_upcall(cd, h, expkey_request); |
| 73 | } |
| 74 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 75 | static struct svc_expkey *svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old); |
| 76 | static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *); |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 77 | static struct cache_detail svc_expkey_cache; |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen) |
| 80 | { |
| 81 | /* client fsidtype fsid [path] */ |
| 82 | char *buf; |
| 83 | int len; |
| 84 | struct auth_domain *dom = NULL; |
| 85 | int err; |
| 86 | int fsidtype; |
| 87 | char *ep; |
| 88 | struct svc_expkey key; |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 89 | struct svc_expkey *ek = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | if (mesg[mlen-1] != '\n') |
| 92 | return -EINVAL; |
| 93 | mesg[mlen-1] = 0; |
| 94 | |
| 95 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 96 | err = -ENOMEM; |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 97 | if (!buf) |
| 98 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
| 100 | err = -EINVAL; |
| 101 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 102 | goto out; |
| 103 | |
| 104 | err = -ENOENT; |
| 105 | dom = auth_domain_find(buf); |
| 106 | if (!dom) |
| 107 | goto out; |
| 108 | dprintk("found domain %s\n", buf); |
| 109 | |
| 110 | err = -EINVAL; |
| 111 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 112 | goto out; |
| 113 | fsidtype = simple_strtoul(buf, &ep, 10); |
| 114 | if (*ep) |
| 115 | goto out; |
| 116 | dprintk("found fsidtype %d\n", fsidtype); |
Frank Filz | 4bdff8c | 2006-06-30 01:56:11 -0700 | [diff] [blame] | 117 | if (key_len(fsidtype)==0) /* invalid type */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | goto out; |
| 119 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 120 | goto out; |
| 121 | dprintk("found fsid length %d\n", len); |
| 122 | if (len != key_len(fsidtype)) |
| 123 | goto out; |
| 124 | |
| 125 | /* OK, we seem to have a valid key */ |
| 126 | key.h.flags = 0; |
| 127 | key.h.expiry_time = get_expiry(&mesg); |
| 128 | if (key.h.expiry_time == 0) |
| 129 | goto out; |
| 130 | |
| 131 | key.ek_client = dom; |
| 132 | key.ek_fsidtype = fsidtype; |
| 133 | memcpy(key.ek_fsid, buf, len); |
| 134 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 135 | ek = svc_expkey_lookup(&key); |
| 136 | err = -ENOMEM; |
| 137 | if (!ek) |
| 138 | goto out; |
| 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | /* now we want a pathname, or empty meaning NEGATIVE */ |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 141 | err = -EINVAL; |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 142 | len = qword_get(&mesg, buf, PAGE_SIZE); |
| 143 | if (len < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | goto out; |
| 145 | dprintk("Path seems to be <%s>\n", buf); |
| 146 | err = 0; |
| 147 | if (len == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | set_bit(CACHE_NEGATIVE, &key.h.flags); |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 149 | ek = svc_expkey_update(&key, ek); |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 150 | if (!ek) |
| 151 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | } else { |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 153 | err = kern_path(buf, 0, &key.ek_path); |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 154 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | goto out; |
| 156 | |
| 157 | dprintk("Found the path %s\n", buf); |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 158 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 159 | ek = svc_expkey_update(&key, ek); |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 160 | if (!ek) |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 161 | err = -ENOMEM; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 162 | path_put(&key.ek_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | } |
| 164 | cache_flush(); |
| 165 | out: |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 166 | if (ek) |
| 167 | cache_put(&ek->h, &svc_expkey_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | if (dom) |
| 169 | auth_domain_put(dom); |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 170 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | return err; |
| 172 | } |
| 173 | |
| 174 | static int expkey_show(struct seq_file *m, |
| 175 | struct cache_detail *cd, |
| 176 | struct cache_head *h) |
| 177 | { |
| 178 | struct svc_expkey *ek ; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 179 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | if (h ==NULL) { |
| 182 | seq_puts(m, "#domain fsidtype fsid [path]\n"); |
| 183 | return 0; |
| 184 | } |
| 185 | ek = container_of(h, struct svc_expkey, h); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 186 | seq_printf(m, "%s %d 0x", ek->ek_client->name, |
| 187 | ek->ek_fsidtype); |
| 188 | for (i=0; i < key_len(ek->ek_fsidtype)/4; i++) |
| 189 | seq_printf(m, "%08x", ek->ek_fsid[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | if (test_bit(CACHE_VALID, &h->flags) && |
| 191 | !test_bit(CACHE_NEGATIVE, &h->flags)) { |
| 192 | seq_printf(m, " "); |
Jan Blunck | c32c2f6 | 2008-02-14 19:38:43 -0800 | [diff] [blame] | 193 | seq_path(m, &ek->ek_path, "\\ \t\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | } |
| 195 | seq_printf(m, "\n"); |
| 196 | return 0; |
| 197 | } |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 198 | |
| 199 | static inline int expkey_match (struct cache_head *a, struct cache_head *b) |
| 200 | { |
| 201 | struct svc_expkey *orig = container_of(a, struct svc_expkey, h); |
| 202 | struct svc_expkey *new = container_of(b, struct svc_expkey, h); |
| 203 | |
| 204 | if (orig->ek_fsidtype != new->ek_fsidtype || |
| 205 | orig->ek_client != new->ek_client || |
| 206 | memcmp(orig->ek_fsid, new->ek_fsid, key_len(orig->ek_fsidtype)) != 0) |
| 207 | return 0; |
| 208 | return 1; |
| 209 | } |
| 210 | |
| 211 | static inline void expkey_init(struct cache_head *cnew, |
| 212 | struct cache_head *citem) |
| 213 | { |
| 214 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
| 215 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); |
| 216 | |
| 217 | kref_get(&item->ek_client->ref); |
| 218 | new->ek_client = item->ek_client; |
| 219 | new->ek_fsidtype = item->ek_fsidtype; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 220 | |
| 221 | memcpy(new->ek_fsid, item->ek_fsid, sizeof(new->ek_fsid)); |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | static inline void expkey_update(struct cache_head *cnew, |
| 225 | struct cache_head *citem) |
| 226 | { |
| 227 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
| 228 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); |
| 229 | |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 230 | new->ek_path = item->ek_path; |
| 231 | path_get(&item->ek_path); |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | static struct cache_head *expkey_alloc(void) |
| 235 | { |
| 236 | struct svc_expkey *i = kmalloc(sizeof(*i), GFP_KERNEL); |
| 237 | if (i) |
| 238 | return &i->h; |
| 239 | else |
| 240 | return NULL; |
| 241 | } |
| 242 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 243 | static struct cache_detail svc_expkey_cache = { |
Bruce Allan | f35279d | 2005-09-06 15:17:08 -0700 | [diff] [blame] | 244 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | .hash_size = EXPKEY_HASHMAX, |
| 246 | .hash_table = expkey_table, |
| 247 | .name = "nfsd.fh", |
| 248 | .cache_put = expkey_put, |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 249 | .cache_upcall = expkey_upcall, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | .cache_parse = expkey_parse, |
| 251 | .cache_show = expkey_show, |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 252 | .match = expkey_match, |
| 253 | .init = expkey_init, |
| 254 | .update = expkey_update, |
| 255 | .alloc = expkey_alloc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | }; |
| 257 | |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 258 | static int |
| 259 | svc_expkey_hash(struct svc_expkey *item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | { |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 261 | int hash = item->ek_fsidtype; |
| 262 | char * cp = (char*)item->ek_fsid; |
| 263 | int len = key_len(item->ek_fsidtype); |
| 264 | |
| 265 | hash ^= hash_mem(cp, len, EXPKEY_HASHBITS); |
| 266 | hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS); |
| 267 | hash &= EXPKEY_HASHMASK; |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 268 | return hash; |
| 269 | } |
| 270 | |
| 271 | static struct svc_expkey * |
| 272 | svc_expkey_lookup(struct svc_expkey *item) |
| 273 | { |
| 274 | struct cache_head *ch; |
| 275 | int hash = svc_expkey_hash(item); |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 276 | |
| 277 | ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h, |
| 278 | hash); |
| 279 | if (ch) |
| 280 | return container_of(ch, struct svc_expkey, h); |
| 281 | else |
| 282 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | } |
| 284 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 285 | static struct svc_expkey * |
| 286 | svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | { |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 288 | struct cache_head *ch; |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 289 | int hash = svc_expkey_hash(new); |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 290 | |
| 291 | ch = sunrpc_cache_update(&svc_expkey_cache, &new->h, |
| 292 | &old->h, hash); |
| 293 | if (ch) |
| 294 | return container_of(ch, struct svc_expkey, h); |
| 295 | else |
| 296 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
| 300 | #define EXPORT_HASHBITS 8 |
| 301 | #define EXPORT_HASHMAX (1<< EXPORT_HASHBITS) |
| 302 | #define EXPORT_HASHMASK (EXPORT_HASHMAX -1) |
| 303 | |
| 304 | static struct cache_head *export_table[EXPORT_HASHMAX]; |
| 305 | |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 306 | static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc) |
| 307 | { |
| 308 | int i; |
| 309 | |
| 310 | for (i = 0; i < fsloc->locations_count; i++) { |
| 311 | kfree(fsloc->locations[i].path); |
| 312 | kfree(fsloc->locations[i].hosts); |
| 313 | } |
| 314 | kfree(fsloc->locations); |
| 315 | } |
| 316 | |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 317 | static void svc_export_put(struct kref *ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | { |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 319 | struct svc_export *exp = container_of(ref, struct svc_export, h.ref); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 320 | path_put(&exp->ex_path); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 321 | auth_domain_put(exp->ex_client); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 322 | kfree(exp->ex_pathname); |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 323 | nfsd4_fslocs_free(&exp->ex_fslocs); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 324 | kfree(exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | static void svc_export_request(struct cache_detail *cd, |
| 328 | struct cache_head *h, |
| 329 | char **bpp, int *blen) |
| 330 | { |
| 331 | /* client path */ |
| 332 | struct svc_export *exp = container_of(h, struct svc_export, h); |
| 333 | char *pth; |
| 334 | |
| 335 | qword_add(bpp, blen, exp->ex_client->name); |
Jan Blunck | cf28b48 | 2008-02-14 19:38:44 -0800 | [diff] [blame] | 336 | pth = d_path(&exp->ex_path, *bpp, *blen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | if (IS_ERR(pth)) { |
| 338 | /* is this correct? */ |
| 339 | (*bpp)[0] = '\n'; |
| 340 | return; |
| 341 | } |
| 342 | qword_add(bpp, blen, pth); |
| 343 | (*bpp)[-1] = '\n'; |
| 344 | } |
| 345 | |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 346 | static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h) |
| 347 | { |
| 348 | return sunrpc_cache_pipe_upcall(cd, h, svc_export_request); |
| 349 | } |
| 350 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 351 | static struct svc_export *svc_export_update(struct svc_export *new, |
| 352 | struct svc_export *old); |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 353 | static struct svc_export *svc_export_lookup(struct svc_export *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
J. Bruce Fields | 774b147 | 2009-12-13 20:21:48 -0500 | [diff] [blame] | 355 | static int check_export(struct inode *inode, int *flags, unsigned char *uuid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | { |
| 357 | |
J. Bruce Fields | f2ca715 | 2009-11-12 17:26:19 -0500 | [diff] [blame] | 358 | /* |
| 359 | * We currently export only dirs, regular files, and (for v4 |
| 360 | * pseudoroot) symlinks. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | */ |
| 362 | if (!S_ISDIR(inode->i_mode) && |
J. Bruce Fields | f2ca715 | 2009-11-12 17:26:19 -0500 | [diff] [blame] | 363 | !S_ISLNK(inode->i_mode) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | !S_ISREG(inode->i_mode)) |
| 365 | return -ENOTDIR; |
| 366 | |
J. Bruce Fields | 774b147 | 2009-12-13 20:21:48 -0500 | [diff] [blame] | 367 | /* |
| 368 | * Mountd should never pass down a writeable V4ROOT export, but, |
| 369 | * just to make sure: |
| 370 | */ |
| 371 | if (*flags & NFSEXP_V4ROOT) |
| 372 | *flags |= NFSEXP_READONLY; |
| 373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | /* There are two requirements on a filesystem to be exportable. |
| 375 | * 1: We must be able to identify the filesystem from a number. |
| 376 | * either a device number (so FS_REQUIRES_DEV needed) |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 377 | * or an FSID number (so NFSEXP_FSID or ->uuid is needed). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | * 2: We must be able to find an inode from a filehandle. |
| 379 | * This means that s_export_op must be set. |
| 380 | */ |
| 381 | if (!(inode->i_sb->s_type->fs_flags & FS_REQUIRES_DEV) && |
J. Bruce Fields | 774b147 | 2009-12-13 20:21:48 -0500 | [diff] [blame] | 382 | !(*flags & NFSEXP_FSID) && |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 383 | uuid == NULL) { |
Greg Banks | 3e3b480 | 2006-10-02 02:17:41 -0700 | [diff] [blame] | 384 | dprintk("exp_export: export of non-dev fs without fsid\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | return -EINVAL; |
| 386 | } |
Christoph Hellwig | cfaea78 | 2007-10-21 16:42:16 -0700 | [diff] [blame] | 387 | |
| 388 | if (!inode->i_sb->s_export_op || |
| 389 | !inode->i_sb->s_export_op->fh_to_dentry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | dprintk("exp_export: export of invalid fs type.\n"); |
| 391 | return -EINVAL; |
| 392 | } |
| 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | return 0; |
| 395 | |
| 396 | } |
| 397 | |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 398 | #ifdef CONFIG_NFSD_V4 |
| 399 | |
| 400 | static int |
| 401 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc) |
| 402 | { |
| 403 | int len; |
| 404 | int migrated, i, err; |
| 405 | |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 406 | /* listsize */ |
| 407 | err = get_int(mesg, &fsloc->locations_count); |
| 408 | if (err) |
| 409 | return err; |
| 410 | if (fsloc->locations_count > MAX_FS_LOCATIONS) |
| 411 | return -EINVAL; |
| 412 | if (fsloc->locations_count == 0) |
| 413 | return 0; |
| 414 | |
| 415 | fsloc->locations = kzalloc(fsloc->locations_count |
| 416 | * sizeof(struct nfsd4_fs_location), GFP_KERNEL); |
| 417 | if (!fsloc->locations) |
| 418 | return -ENOMEM; |
| 419 | for (i=0; i < fsloc->locations_count; i++) { |
| 420 | /* colon separated host list */ |
| 421 | err = -EINVAL; |
| 422 | len = qword_get(mesg, buf, PAGE_SIZE); |
| 423 | if (len <= 0) |
| 424 | goto out_free_all; |
| 425 | err = -ENOMEM; |
| 426 | fsloc->locations[i].hosts = kstrdup(buf, GFP_KERNEL); |
| 427 | if (!fsloc->locations[i].hosts) |
| 428 | goto out_free_all; |
| 429 | err = -EINVAL; |
| 430 | /* slash separated path component list */ |
| 431 | len = qword_get(mesg, buf, PAGE_SIZE); |
| 432 | if (len <= 0) |
| 433 | goto out_free_all; |
| 434 | err = -ENOMEM; |
| 435 | fsloc->locations[i].path = kstrdup(buf, GFP_KERNEL); |
| 436 | if (!fsloc->locations[i].path) |
| 437 | goto out_free_all; |
| 438 | } |
| 439 | /* migrated */ |
| 440 | err = get_int(mesg, &migrated); |
| 441 | if (err) |
| 442 | goto out_free_all; |
| 443 | err = -EINVAL; |
| 444 | if (migrated < 0 || migrated > 1) |
| 445 | goto out_free_all; |
| 446 | fsloc->migrated = migrated; |
| 447 | return 0; |
| 448 | out_free_all: |
| 449 | nfsd4_fslocs_free(fsloc); |
| 450 | return err; |
| 451 | } |
| 452 | |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 453 | static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp) |
| 454 | { |
| 455 | int listsize, err; |
| 456 | struct exp_flavor_info *f; |
| 457 | |
| 458 | err = get_int(mesg, &listsize); |
| 459 | if (err) |
| 460 | return err; |
| 461 | if (listsize < 0 || listsize > MAX_SECINFO_LIST) |
| 462 | return -EINVAL; |
| 463 | |
| 464 | for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) { |
| 465 | err = get_int(mesg, &f->pseudoflavor); |
| 466 | if (err) |
| 467 | return err; |
| 468 | /* |
Roel Kluin | 80492e7 | 2009-04-21 16:08:39 +0200 | [diff] [blame] | 469 | * XXX: It would be nice to also check whether this |
| 470 | * pseudoflavor is supported, so we can discover the |
| 471 | * problem at export time instead of when a client fails |
| 472 | * to authenticate. |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 473 | */ |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 474 | err = get_int(mesg, &f->flags); |
| 475 | if (err) |
| 476 | return err; |
| 477 | /* Only some flags are allowed to differ between flavors: */ |
| 478 | if (~NFSEXP_SECINFO_FLAGS & (f->flags ^ exp->ex_flags)) |
| 479 | return -EINVAL; |
| 480 | } |
| 481 | exp->ex_nflavors = listsize; |
| 482 | return 0; |
| 483 | } |
| 484 | |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 485 | #else /* CONFIG_NFSD_V4 */ |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 486 | static inline int |
| 487 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc){return 0;} |
| 488 | static inline int |
| 489 | secinfo_parse(char **mesg, char *buf, struct svc_export *exp) { return 0; } |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 490 | #endif |
| 491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen) |
| 493 | { |
| 494 | /* client path expiry [flags anonuid anongid fsid] */ |
| 495 | char *buf; |
| 496 | int len; |
| 497 | int err; |
| 498 | struct auth_domain *dom = NULL; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 499 | struct svc_export exp = {}, *expp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | int an_int; |
| 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | if (mesg[mlen-1] != '\n') |
| 503 | return -EINVAL; |
| 504 | mesg[mlen-1] = 0; |
| 505 | |
| 506 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 507 | if (!buf) |
| 508 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | |
| 510 | /* client */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | err = -EINVAL; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 512 | len = qword_get(&mesg, buf, PAGE_SIZE); |
| 513 | if (len <= 0) |
| 514 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
| 516 | err = -ENOENT; |
| 517 | dom = auth_domain_find(buf); |
| 518 | if (!dom) |
| 519 | goto out; |
| 520 | |
| 521 | /* path */ |
| 522 | err = -EINVAL; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 523 | if ((len = qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 524 | goto out1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 526 | err = kern_path(buf, 0, &exp.ex_path); |
| 527 | if (err) |
| 528 | goto out1; |
| 529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | exp.ex_client = dom; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 531 | |
J.Bruce Fields | b009a87 | 2006-10-04 02:16:17 -0700 | [diff] [blame] | 532 | err = -ENOMEM; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 533 | exp.ex_pathname = kstrdup(buf, GFP_KERNEL); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 534 | if (!exp.ex_pathname) |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 535 | goto out2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | |
| 537 | /* expiry */ |
| 538 | err = -EINVAL; |
| 539 | exp.h.expiry_time = get_expiry(&mesg); |
| 540 | if (exp.h.expiry_time == 0) |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 541 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
| 543 | /* flags */ |
| 544 | err = get_int(&mesg, &an_int); |
J. Bruce Fields | 4a4b883 | 2007-07-31 00:37:53 -0700 | [diff] [blame] | 545 | if (err == -ENOENT) { |
| 546 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | set_bit(CACHE_NEGATIVE, &exp.h.flags); |
J. Bruce Fields | 4a4b883 | 2007-07-31 00:37:53 -0700 | [diff] [blame] | 548 | } else { |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 549 | if (err || an_int < 0) |
| 550 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | exp.ex_flags= an_int; |
| 552 | |
| 553 | /* anon uid */ |
| 554 | err = get_int(&mesg, &an_int); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 555 | if (err) |
| 556 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | exp.ex_anon_uid= an_int; |
| 558 | |
| 559 | /* anon gid */ |
| 560 | err = get_int(&mesg, &an_int); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 561 | if (err) |
| 562 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | exp.ex_anon_gid= an_int; |
| 564 | |
| 565 | /* fsid */ |
| 566 | err = get_int(&mesg, &an_int); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 567 | if (err) |
| 568 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | exp.ex_fsid = an_int; |
| 570 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 571 | while ((len = qword_get(&mesg, buf, PAGE_SIZE)) > 0) { |
| 572 | if (strcmp(buf, "fsloc") == 0) |
| 573 | err = fsloc_parse(&mesg, buf, &exp.ex_fslocs); |
| 574 | else if (strcmp(buf, "uuid") == 0) { |
| 575 | /* expect a 16 byte uuid encoded as \xXXXX... */ |
| 576 | len = qword_get(&mesg, buf, PAGE_SIZE); |
| 577 | if (len != 16) |
| 578 | err = -EINVAL; |
| 579 | else { |
| 580 | exp.ex_uuid = |
| 581 | kmemdup(buf, 16, GFP_KERNEL); |
| 582 | if (exp.ex_uuid == NULL) |
| 583 | err = -ENOMEM; |
| 584 | } |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 585 | } else if (strcmp(buf, "secinfo") == 0) |
| 586 | err = secinfo_parse(&mesg, buf, &exp); |
| 587 | else |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 588 | /* quietly ignore unknown words and anything |
| 589 | * following. Newer user-space can try to set |
| 590 | * new values, then see what the result was. |
| 591 | */ |
| 592 | break; |
| 593 | if (err) |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 594 | goto out4; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 595 | } |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 596 | |
J. Bruce Fields | 774b147 | 2009-12-13 20:21:48 -0500 | [diff] [blame] | 597 | err = check_export(exp.ex_path.dentry->d_inode, &exp.ex_flags, |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 598 | exp.ex_uuid); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 599 | if (err) |
| 600 | goto out4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | } |
| 602 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 603 | expp = svc_export_lookup(&exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | if (expp) |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 605 | expp = svc_export_update(&exp, expp); |
| 606 | else |
| 607 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | cache_flush(); |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 609 | if (expp == NULL) |
| 610 | err = -ENOMEM; |
| 611 | else |
| 612 | exp_put(expp); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 613 | out4: |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 614 | nfsd4_fslocs_free(&exp.ex_fslocs); |
| 615 | kfree(exp.ex_uuid); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 616 | out3: |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 617 | kfree(exp.ex_pathname); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 618 | out2: |
| 619 | path_put(&exp.ex_path); |
| 620 | out1: |
| 621 | auth_domain_put(dom); |
| 622 | out: |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 623 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | return err; |
| 625 | } |
| 626 | |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 627 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
| 628 | uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs); |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 629 | static void show_secinfo(struct seq_file *m, struct svc_export *exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | |
| 631 | static int svc_export_show(struct seq_file *m, |
| 632 | struct cache_detail *cd, |
| 633 | struct cache_head *h) |
| 634 | { |
| 635 | struct svc_export *exp ; |
| 636 | |
| 637 | if (h ==NULL) { |
| 638 | seq_puts(m, "#path domain(flags)\n"); |
| 639 | return 0; |
| 640 | } |
| 641 | exp = container_of(h, struct svc_export, h); |
Jan Blunck | c32c2f6 | 2008-02-14 19:38:43 -0800 | [diff] [blame] | 642 | seq_path(m, &exp->ex_path, " \t\n\\"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | seq_putc(m, '\t'); |
| 644 | seq_escape(m, exp->ex_client->name, " \t\n\\"); |
| 645 | seq_putc(m, '('); |
| 646 | if (test_bit(CACHE_VALID, &h->flags) && |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 647 | !test_bit(CACHE_NEGATIVE, &h->flags)) { |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 648 | exp_flags(m, exp->ex_flags, exp->ex_fsid, |
| 649 | exp->ex_anon_uid, exp->ex_anon_gid, &exp->ex_fslocs); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 650 | if (exp->ex_uuid) { |
| 651 | int i; |
| 652 | seq_puts(m, ",uuid="); |
| 653 | for (i=0; i<16; i++) { |
| 654 | if ((i&3) == 0 && i) |
| 655 | seq_putc(m, ':'); |
| 656 | seq_printf(m, "%02x", exp->ex_uuid[i]); |
| 657 | } |
| 658 | } |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 659 | show_secinfo(m, exp); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 660 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | seq_puts(m, ")\n"); |
| 662 | return 0; |
| 663 | } |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 664 | static int svc_export_match(struct cache_head *a, struct cache_head *b) |
| 665 | { |
| 666 | struct svc_export *orig = container_of(a, struct svc_export, h); |
| 667 | struct svc_export *new = container_of(b, struct svc_export, h); |
| 668 | return orig->ex_client == new->ex_client && |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 669 | orig->ex_path.dentry == new->ex_path.dentry && |
| 670 | orig->ex_path.mnt == new->ex_path.mnt; |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 671 | } |
| 672 | |
| 673 | static void svc_export_init(struct cache_head *cnew, struct cache_head *citem) |
| 674 | { |
| 675 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
| 676 | struct svc_export *item = container_of(citem, struct svc_export, h); |
| 677 | |
| 678 | kref_get(&item->ex_client->ref); |
| 679 | new->ex_client = item->ex_client; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 680 | new->ex_path.dentry = dget(item->ex_path.dentry); |
| 681 | new->ex_path.mnt = mntget(item->ex_path.mnt); |
| 682 | new->ex_pathname = NULL; |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 683 | new->ex_fslocs.locations = NULL; |
| 684 | new->ex_fslocs.locations_count = 0; |
| 685 | new->ex_fslocs.migrated = 0; |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | static void export_update(struct cache_head *cnew, struct cache_head *citem) |
| 689 | { |
| 690 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
| 691 | struct svc_export *item = container_of(citem, struct svc_export, h); |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 692 | int i; |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 693 | |
| 694 | new->ex_flags = item->ex_flags; |
| 695 | new->ex_anon_uid = item->ex_anon_uid; |
| 696 | new->ex_anon_gid = item->ex_anon_gid; |
| 697 | new->ex_fsid = item->ex_fsid; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 698 | new->ex_uuid = item->ex_uuid; |
| 699 | item->ex_uuid = NULL; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 700 | new->ex_pathname = item->ex_pathname; |
| 701 | item->ex_pathname = NULL; |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 702 | new->ex_fslocs.locations = item->ex_fslocs.locations; |
| 703 | item->ex_fslocs.locations = NULL; |
| 704 | new->ex_fslocs.locations_count = item->ex_fslocs.locations_count; |
| 705 | item->ex_fslocs.locations_count = 0; |
| 706 | new->ex_fslocs.migrated = item->ex_fslocs.migrated; |
| 707 | item->ex_fslocs.migrated = 0; |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 708 | new->ex_nflavors = item->ex_nflavors; |
| 709 | for (i = 0; i < MAX_SECINFO_LIST; i++) { |
| 710 | new->ex_flavors[i] = item->ex_flavors[i]; |
| 711 | } |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 712 | } |
| 713 | |
| 714 | static struct cache_head *svc_export_alloc(void) |
| 715 | { |
| 716 | struct svc_export *i = kmalloc(sizeof(*i), GFP_KERNEL); |
| 717 | if (i) |
| 718 | return &i->h; |
| 719 | else |
| 720 | return NULL; |
| 721 | } |
| 722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | struct cache_detail svc_export_cache = { |
Bruce Allan | f35279d | 2005-09-06 15:17:08 -0700 | [diff] [blame] | 724 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | .hash_size = EXPORT_HASHMAX, |
| 726 | .hash_table = export_table, |
| 727 | .name = "nfsd.export", |
| 728 | .cache_put = svc_export_put, |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 729 | .cache_upcall = svc_export_upcall, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | .cache_parse = svc_export_parse, |
| 731 | .cache_show = svc_export_show, |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 732 | .match = svc_export_match, |
| 733 | .init = svc_export_init, |
| 734 | .update = export_update, |
| 735 | .alloc = svc_export_alloc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | }; |
| 737 | |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 738 | static int |
| 739 | svc_export_hash(struct svc_export *exp) |
| 740 | { |
| 741 | int hash; |
| 742 | |
| 743 | hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS); |
| 744 | hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS); |
| 745 | hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS); |
| 746 | return hash; |
| 747 | } |
| 748 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 749 | static struct svc_export * |
| 750 | svc_export_lookup(struct svc_export *exp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | { |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 752 | struct cache_head *ch; |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 753 | int hash = svc_export_hash(exp); |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 754 | |
| 755 | ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h, |
| 756 | hash); |
| 757 | if (ch) |
| 758 | return container_of(ch, struct svc_export, h); |
| 759 | else |
| 760 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | } |
| 762 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 763 | static struct svc_export * |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 764 | svc_export_update(struct svc_export *new, struct svc_export *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | { |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 766 | struct cache_head *ch; |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 767 | int hash = svc_export_hash(old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 769 | ch = sunrpc_cache_update(&svc_export_cache, &new->h, |
| 770 | &old->h, |
| 771 | hash); |
| 772 | if (ch) |
| 773 | return container_of(ch, struct svc_export, h); |
| 774 | else |
| 775 | return NULL; |
| 776 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | |
| 778 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 779 | static struct svc_expkey * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp) |
| 781 | { |
| 782 | struct svc_expkey key, *ek; |
| 783 | int err; |
| 784 | |
| 785 | if (!clp) |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 786 | return ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | |
| 788 | key.ek_client = clp; |
| 789 | key.ek_fsidtype = fsid_type; |
| 790 | memcpy(key.ek_fsid, fsidv, key_len(fsid_type)); |
| 791 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 792 | ek = svc_expkey_lookup(&key); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 793 | if (ek == NULL) |
| 794 | return ERR_PTR(-ENOMEM); |
| 795 | err = cache_check(&svc_expkey_cache, &ek->h, reqp); |
| 796 | if (err) |
| 797 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | return ek; |
| 799 | } |
| 800 | |
NeilBrown | 1e14056 | 2010-09-22 12:55:07 +1000 | [diff] [blame] | 801 | #ifdef CONFIG_NFSD_DEPRECATED |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | static int exp_set_key(svc_client *clp, int fsid_type, u32 *fsidv, |
| 803 | struct svc_export *exp) |
| 804 | { |
| 805 | struct svc_expkey key, *ek; |
| 806 | |
| 807 | key.ek_client = clp; |
| 808 | key.ek_fsidtype = fsid_type; |
| 809 | memcpy(key.ek_fsid, fsidv, key_len(fsid_type)); |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 810 | key.ek_path = exp->ex_path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | key.h.expiry_time = NEVER; |
| 812 | key.h.flags = 0; |
| 813 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 814 | ek = svc_expkey_lookup(&key); |
| 815 | if (ek) |
| 816 | ek = svc_expkey_update(&key,ek); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | if (ek) { |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 818 | cache_put(&ek->h, &svc_expkey_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | return 0; |
| 820 | } |
| 821 | return -ENOMEM; |
| 822 | } |
| 823 | |
| 824 | /* |
| 825 | * Find the client's export entry matching xdev/xino. |
| 826 | */ |
| 827 | static inline struct svc_expkey * |
| 828 | exp_get_key(svc_client *clp, dev_t dev, ino_t ino) |
| 829 | { |
| 830 | u32 fsidv[3]; |
| 831 | |
| 832 | if (old_valid_dev(dev)) { |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 833 | mk_fsid(FSID_DEV, fsidv, dev, ino, 0, NULL); |
| 834 | return exp_find_key(clp, FSID_DEV, fsidv, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | } |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 836 | mk_fsid(FSID_ENCODE_DEV, fsidv, dev, ino, 0, NULL); |
| 837 | return exp_find_key(clp, FSID_ENCODE_DEV, fsidv, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | } |
| 839 | |
| 840 | /* |
| 841 | * Find the client's export entry matching fsid |
| 842 | */ |
| 843 | static inline struct svc_expkey * |
| 844 | exp_get_fsid_key(svc_client *clp, int fsid) |
| 845 | { |
| 846 | u32 fsidv[2]; |
| 847 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 848 | mk_fsid(FSID_NUM, fsidv, 0, 0, fsid, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 850 | return exp_find_key(clp, FSID_NUM, fsidv, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | } |
NeilBrown | 1e14056 | 2010-09-22 12:55:07 +1000 | [diff] [blame] | 852 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 854 | static svc_export *exp_get_by_name(svc_client *clp, const struct path *path, |
| 855 | struct cache_req *reqp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | { |
| 857 | struct svc_export *exp, key; |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 858 | int err; |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | if (!clp) |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 861 | return ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | |
| 863 | key.ex_client = clp; |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 864 | key.ex_path = *path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 866 | exp = svc_export_lookup(&key); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 867 | if (exp == NULL) |
| 868 | return ERR_PTR(-ENOMEM); |
| 869 | err = cache_check(&svc_export_cache, &exp->h, reqp); |
| 870 | if (err) |
| 871 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | return exp; |
| 873 | } |
| 874 | |
| 875 | /* |
| 876 | * Find the export entry for a given dentry. |
| 877 | */ |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 878 | static struct svc_export *exp_parent(svc_client *clp, struct path *path) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | { |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 880 | struct dentry *saved = dget(path->dentry); |
| 881 | svc_export *exp = exp_get_by_name(clp, path, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 883 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) { |
| 884 | struct dentry *parent = dget_parent(path->dentry); |
| 885 | dput(path->dentry); |
| 886 | path->dentry = parent; |
| 887 | exp = exp_get_by_name(clp, path, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | } |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 889 | dput(path->dentry); |
| 890 | path->dentry = saved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | return exp; |
| 892 | } |
| 893 | |
NeilBrown | 1e14056 | 2010-09-22 12:55:07 +1000 | [diff] [blame] | 894 | #ifdef CONFIG_NFSD_DEPRECATED |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | /* |
| 896 | * Hashtable locking. Write locks are placed only by user processes |
| 897 | * wanting to modify export information. |
| 898 | * Write locking only done in this file. Read locking |
| 899 | * needed externally. |
| 900 | */ |
| 901 | |
| 902 | static DECLARE_RWSEM(hash_sem); |
| 903 | |
| 904 | void |
| 905 | exp_readlock(void) |
| 906 | { |
| 907 | down_read(&hash_sem); |
| 908 | } |
| 909 | |
| 910 | static inline void |
| 911 | exp_writelock(void) |
| 912 | { |
| 913 | down_write(&hash_sem); |
| 914 | } |
| 915 | |
| 916 | void |
| 917 | exp_readunlock(void) |
| 918 | { |
| 919 | up_read(&hash_sem); |
| 920 | } |
| 921 | |
| 922 | static inline void |
| 923 | exp_writeunlock(void) |
| 924 | { |
| 925 | up_write(&hash_sem); |
| 926 | } |
NeilBrown | 1e14056 | 2010-09-22 12:55:07 +1000 | [diff] [blame] | 927 | #else |
| 928 | |
| 929 | /* hash_sem not needed once deprecated interface is removed */ |
| 930 | void exp_readlock(void) {} |
| 931 | static inline void exp_writelock(void){} |
| 932 | void exp_readunlock(void) {} |
| 933 | static inline void exp_writeunlock(void){} |
| 934 | |
| 935 | #endif |
| 936 | |
| 937 | #ifdef CONFIG_NFSD_DEPRECATED |
| 938 | static void exp_do_unexport(svc_export *unexp); |
| 939 | static int exp_verify_string(char *cp, int max); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | |
| 941 | static void exp_fsid_unhash(struct svc_export *exp) |
| 942 | { |
| 943 | struct svc_expkey *ek; |
| 944 | |
| 945 | if ((exp->ex_flags & NFSEXP_FSID) == 0) |
| 946 | return; |
| 947 | |
| 948 | ek = exp_get_fsid_key(exp->ex_client, exp->ex_fsid); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 949 | if (!IS_ERR(ek)) { |
NeilBrown | 17cebf6 | 2010-08-12 16:55:22 +1000 | [diff] [blame] | 950 | sunrpc_invalidate(&ek->h, &svc_expkey_cache); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 951 | cache_put(&ek->h, &svc_expkey_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | } |
| 954 | |
| 955 | static int exp_fsid_hash(svc_client *clp, struct svc_export *exp) |
| 956 | { |
| 957 | u32 fsid[2]; |
| 958 | |
| 959 | if ((exp->ex_flags & NFSEXP_FSID) == 0) |
| 960 | return 0; |
| 961 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 962 | mk_fsid(FSID_NUM, fsid, 0, 0, exp->ex_fsid, NULL); |
| 963 | return exp_set_key(clp, FSID_NUM, fsid, exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | static int exp_hash(struct auth_domain *clp, struct svc_export *exp) |
| 967 | { |
| 968 | u32 fsid[2]; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 969 | struct inode *inode = exp->ex_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | dev_t dev = inode->i_sb->s_dev; |
| 971 | |
| 972 | if (old_valid_dev(dev)) { |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 973 | mk_fsid(FSID_DEV, fsid, dev, inode->i_ino, 0, NULL); |
| 974 | return exp_set_key(clp, FSID_DEV, fsid, exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | } |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 976 | mk_fsid(FSID_ENCODE_DEV, fsid, dev, inode->i_ino, 0, NULL); |
| 977 | return exp_set_key(clp, FSID_ENCODE_DEV, fsid, exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | } |
| 979 | |
| 980 | static void exp_unhash(struct svc_export *exp) |
| 981 | { |
| 982 | struct svc_expkey *ek; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 983 | struct inode *inode = exp->ex_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | |
| 985 | ek = exp_get_key(exp->ex_client, inode->i_sb->s_dev, inode->i_ino); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 986 | if (!IS_ERR(ek)) { |
NeilBrown | 17cebf6 | 2010-08-12 16:55:22 +1000 | [diff] [blame] | 987 | sunrpc_invalidate(&ek->h, &svc_expkey_cache); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 988 | cache_put(&ek->h, &svc_expkey_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | } |
| 991 | |
| 992 | /* |
| 993 | * Export a file system. |
| 994 | */ |
| 995 | int |
| 996 | exp_export(struct nfsctl_export *nxp) |
| 997 | { |
| 998 | svc_client *clp; |
| 999 | struct svc_export *exp = NULL; |
| 1000 | struct svc_export new; |
| 1001 | struct svc_expkey *fsid_key = NULL; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1002 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | int err; |
| 1004 | |
| 1005 | /* Consistency check */ |
| 1006 | err = -EINVAL; |
| 1007 | if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) || |
| 1008 | !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX)) |
| 1009 | goto out; |
| 1010 | |
| 1011 | dprintk("exp_export called for %s:%s (%x/%ld fl %x).\n", |
| 1012 | nxp->ex_client, nxp->ex_path, |
| 1013 | (unsigned)nxp->ex_dev, (long)nxp->ex_ino, |
| 1014 | nxp->ex_flags); |
| 1015 | |
| 1016 | /* Try to lock the export table for update */ |
| 1017 | exp_writelock(); |
| 1018 | |
| 1019 | /* Look up client info */ |
| 1020 | if (!(clp = auth_domain_find(nxp->ex_client))) |
| 1021 | goto out_unlock; |
| 1022 | |
| 1023 | |
| 1024 | /* Look up the dentry */ |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1025 | err = kern_path(nxp->ex_path, 0, &path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | if (err) |
Julia Lawall | 53e6d8d | 2008-07-25 22:08:09 +0200 | [diff] [blame] | 1027 | goto out_put_clp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | err = -EINVAL; |
| 1029 | |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 1030 | exp = exp_get_by_name(clp, &path, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | |
NeilBrown | f988443 | 2006-12-13 00:35:45 -0800 | [diff] [blame] | 1032 | memset(&new, 0, sizeof(new)); |
| 1033 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | /* must make sure there won't be an ex_fsid clash */ |
| 1035 | if ((nxp->ex_flags & NFSEXP_FSID) && |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1036 | (!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) && |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 1037 | fsid_key->ek_path.mnt && |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1038 | (fsid_key->ek_path.mnt != path.mnt || |
| 1039 | fsid_key->ek_path.dentry != path.dentry)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | goto finish; |
| 1041 | |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1042 | if (!IS_ERR(exp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | /* just a flags/id/fsid update */ |
| 1044 | |
| 1045 | exp_fsid_unhash(exp); |
| 1046 | exp->ex_flags = nxp->ex_flags; |
| 1047 | exp->ex_anon_uid = nxp->ex_anon_uid; |
| 1048 | exp->ex_anon_gid = nxp->ex_anon_gid; |
| 1049 | exp->ex_fsid = nxp->ex_dev; |
| 1050 | |
| 1051 | err = exp_fsid_hash(clp, exp); |
| 1052 | goto finish; |
| 1053 | } |
| 1054 | |
J. Bruce Fields | 774b147 | 2009-12-13 20:21:48 -0500 | [diff] [blame] | 1055 | err = check_export(path.dentry->d_inode, &nxp->ex_flags, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | if (err) goto finish; |
| 1057 | |
| 1058 | err = -ENOMEM; |
| 1059 | |
| 1060 | dprintk("nfsd: creating export entry %p for client %p\n", exp, clp); |
| 1061 | |
| 1062 | new.h.expiry_time = NEVER; |
| 1063 | new.h.flags = 0; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 1064 | new.ex_pathname = kstrdup(nxp->ex_path, GFP_KERNEL); |
| 1065 | if (!new.ex_pathname) |
NeilBrown | f988443 | 2006-12-13 00:35:45 -0800 | [diff] [blame] | 1066 | goto finish; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | new.ex_client = clp; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1068 | new.ex_path = path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | new.ex_flags = nxp->ex_flags; |
| 1070 | new.ex_anon_uid = nxp->ex_anon_uid; |
| 1071 | new.ex_anon_gid = nxp->ex_anon_gid; |
| 1072 | new.ex_fsid = nxp->ex_dev; |
| 1073 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 1074 | exp = svc_export_lookup(&new); |
| 1075 | if (exp) |
| 1076 | exp = svc_export_update(&new, exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 1078 | if (!exp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | goto finish; |
| 1080 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | if (exp_hash(clp, exp) || |
| 1082 | exp_fsid_hash(clp, exp)) { |
| 1083 | /* failed to create at least one index */ |
| 1084 | exp_do_unexport(exp); |
| 1085 | cache_flush(); |
NeilBrown | f988443 | 2006-12-13 00:35:45 -0800 | [diff] [blame] | 1086 | } else |
| 1087 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | finish: |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 1089 | kfree(new.ex_pathname); |
Dan Carpenter | d03859a | 2010-04-22 11:30:59 +0200 | [diff] [blame] | 1090 | if (!IS_ERR_OR_NULL(exp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | exp_put(exp); |
Dan Carpenter | d03859a | 2010-04-22 11:30:59 +0200 | [diff] [blame] | 1092 | if (!IS_ERR_OR_NULL(fsid_key)) |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 1093 | cache_put(&fsid_key->h, &svc_expkey_cache); |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1094 | path_put(&path); |
Julia Lawall | 53e6d8d | 2008-07-25 22:08:09 +0200 | [diff] [blame] | 1095 | out_put_clp: |
| 1096 | auth_domain_put(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | out_unlock: |
| 1098 | exp_writeunlock(); |
| 1099 | out: |
| 1100 | return err; |
| 1101 | } |
| 1102 | |
| 1103 | /* |
| 1104 | * Unexport a file system. The export entry has already |
| 1105 | * been removed from the client's list of exported fs's. |
| 1106 | */ |
| 1107 | static void |
| 1108 | exp_do_unexport(svc_export *unexp) |
| 1109 | { |
NeilBrown | 17cebf6 | 2010-08-12 16:55:22 +1000 | [diff] [blame] | 1110 | sunrpc_invalidate(&unexp->h, &svc_export_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | exp_unhash(unexp); |
| 1112 | exp_fsid_unhash(unexp); |
| 1113 | } |
| 1114 | |
| 1115 | |
| 1116 | /* |
| 1117 | * unexport syscall. |
| 1118 | */ |
| 1119 | int |
| 1120 | exp_unexport(struct nfsctl_export *nxp) |
| 1121 | { |
| 1122 | struct auth_domain *dom; |
| 1123 | svc_export *exp; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1124 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | int err; |
| 1126 | |
| 1127 | /* Consistency check */ |
| 1128 | if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) || |
| 1129 | !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX)) |
| 1130 | return -EINVAL; |
| 1131 | |
| 1132 | exp_writelock(); |
| 1133 | |
| 1134 | err = -EINVAL; |
| 1135 | dom = auth_domain_find(nxp->ex_client); |
| 1136 | if (!dom) { |
| 1137 | dprintk("nfsd: unexport couldn't find %s\n", nxp->ex_client); |
| 1138 | goto out_unlock; |
| 1139 | } |
| 1140 | |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1141 | err = kern_path(nxp->ex_path, 0, &path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | if (err) |
| 1143 | goto out_domain; |
| 1144 | |
| 1145 | err = -EINVAL; |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 1146 | exp = exp_get_by_name(dom, &path, NULL); |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1147 | path_put(&path); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1148 | if (IS_ERR(exp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | goto out_domain; |
| 1150 | |
| 1151 | exp_do_unexport(exp); |
| 1152 | exp_put(exp); |
| 1153 | err = 0; |
| 1154 | |
| 1155 | out_domain: |
| 1156 | auth_domain_put(dom); |
| 1157 | cache_flush(); |
| 1158 | out_unlock: |
| 1159 | exp_writeunlock(); |
| 1160 | return err; |
| 1161 | } |
NeilBrown | 1e14056 | 2010-09-22 12:55:07 +1000 | [diff] [blame] | 1162 | #endif /* CONFIG_NFSD_DEPRECATED */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | |
| 1164 | /* |
| 1165 | * Obtain the root fh on behalf of a client. |
| 1166 | * This could be done in user space, but I feel that it adds some safety |
| 1167 | * since its harder to fool a kernel module than a user space program. |
| 1168 | */ |
| 1169 | int |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1170 | exp_rootfh(svc_client *clp, char *name, struct knfsd_fh *f, int maxsize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | { |
| 1172 | struct svc_export *exp; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1173 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | struct inode *inode; |
| 1175 | struct svc_fh fh; |
| 1176 | int err; |
| 1177 | |
| 1178 | err = -EPERM; |
| 1179 | /* NB: we probably ought to check that it's NUL-terminated */ |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1180 | if (kern_path(name, 0, &path)) { |
| 1181 | printk("nfsd: exp_rootfh path not found %s", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | return err; |
| 1183 | } |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1184 | inode = path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | |
| 1186 | dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n", |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1187 | name, path.dentry, clp->name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | inode->i_sb->s_id, inode->i_ino); |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 1189 | exp = exp_parent(clp, &path); |
J.Bruce Fields | 4b41bd8 | 2006-12-13 00:35:21 -0800 | [diff] [blame] | 1190 | if (IS_ERR(exp)) { |
| 1191 | err = PTR_ERR(exp); |
| 1192 | goto out; |
| 1193 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | |
| 1195 | /* |
| 1196 | * fh must be initialized before calling fh_compose |
| 1197 | */ |
| 1198 | fh_init(&fh, maxsize); |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1199 | if (fh_compose(&fh, exp, path.dentry, NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | err = -EINVAL; |
| 1201 | else |
| 1202 | err = 0; |
| 1203 | memcpy(f, &fh.fh_handle, sizeof(struct knfsd_fh)); |
| 1204 | fh_put(&fh); |
| 1205 | exp_put(exp); |
| 1206 | out: |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1207 | path_put(&path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | return err; |
| 1209 | } |
| 1210 | |
Adrian Bunk | cce76f9 | 2007-10-16 01:27:52 -0700 | [diff] [blame] | 1211 | static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type, |
| 1212 | u32 *fsidv, struct cache_req *reqp) |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1213 | { |
| 1214 | struct svc_export *exp; |
| 1215 | struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1216 | if (IS_ERR(ek)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 1217 | return ERR_CAST(ek); |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1218 | |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 1219 | exp = exp_get_by_name(clp, &ek->ek_path, reqp); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 1220 | cache_put(&ek->h, &svc_expkey_cache); |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1221 | |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1222 | if (IS_ERR(exp)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 1223 | return ERR_CAST(exp); |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1224 | return exp; |
| 1225 | } |
| 1226 | |
Andy Adamson | 32c1eb0 | 2007-07-17 04:04:48 -0700 | [diff] [blame] | 1227 | __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp) |
| 1228 | { |
| 1229 | struct exp_flavor_info *f; |
| 1230 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; |
| 1231 | |
| 1232 | /* legacy gss-only clients are always OK: */ |
| 1233 | if (exp->ex_client == rqstp->rq_gssclient) |
| 1234 | return 0; |
| 1235 | /* ip-address based client; check sec= export option: */ |
| 1236 | for (f = exp->ex_flavors; f < end; f++) { |
| 1237 | if (f->pseudoflavor == rqstp->rq_flavor) |
| 1238 | return 0; |
| 1239 | } |
| 1240 | /* defaults in absence of sec= options: */ |
| 1241 | if (exp->ex_nflavors == 0) { |
| 1242 | if (rqstp->rq_flavor == RPC_AUTH_NULL || |
| 1243 | rqstp->rq_flavor == RPC_AUTH_UNIX) |
| 1244 | return 0; |
| 1245 | } |
| 1246 | return nfserr_wrongsec; |
| 1247 | } |
| 1248 | |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1249 | /* |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1250 | * Uses rq_client and rq_gssclient to find an export; uses rq_client (an |
| 1251 | * auth_unix client) if it's available and has secinfo information; |
| 1252 | * otherwise, will try to use rq_gssclient. |
| 1253 | * |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1254 | * Called from functions that handle requests; functions that do work on |
| 1255 | * behalf of mountd are passed a single client name to use, and should |
| 1256 | * use exp_get_by_name() or exp_find(). |
| 1257 | */ |
| 1258 | struct svc_export * |
Al Viro | 91c9fa8 | 2009-04-18 02:42:05 -0400 | [diff] [blame] | 1259 | rqst_exp_get_by_name(struct svc_rqst *rqstp, struct path *path) |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1260 | { |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 1261 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
J. Bruce Fields | 3ab4d8b | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1262 | |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1263 | if (rqstp->rq_client == NULL) |
| 1264 | goto gss; |
| 1265 | |
| 1266 | /* First try the auth_unix client: */ |
Al Viro | 91c9fa8 | 2009-04-18 02:42:05 -0400 | [diff] [blame] | 1267 | exp = exp_get_by_name(rqstp->rq_client, path, &rqstp->rq_chandle); |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1268 | if (PTR_ERR(exp) == -ENOENT) |
| 1269 | goto gss; |
| 1270 | if (IS_ERR(exp)) |
| 1271 | return exp; |
| 1272 | /* If it has secinfo, assume there are no gss/... clients */ |
| 1273 | if (exp->ex_nflavors > 0) |
| 1274 | return exp; |
| 1275 | gss: |
| 1276 | /* Otherwise, try falling back on gss client */ |
| 1277 | if (rqstp->rq_gssclient == NULL) |
| 1278 | return exp; |
Al Viro | 91c9fa8 | 2009-04-18 02:42:05 -0400 | [diff] [blame] | 1279 | gssexp = exp_get_by_name(rqstp->rq_gssclient, path, &rqstp->rq_chandle); |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1280 | if (PTR_ERR(gssexp) == -ENOENT) |
| 1281 | return exp; |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 1282 | if (!IS_ERR(exp)) |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1283 | exp_put(exp); |
| 1284 | return gssexp; |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1285 | } |
| 1286 | |
| 1287 | struct svc_export * |
| 1288 | rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv) |
| 1289 | { |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 1290 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
J. Bruce Fields | 3ab4d8b | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1291 | |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1292 | if (rqstp->rq_client == NULL) |
| 1293 | goto gss; |
| 1294 | |
| 1295 | /* First try the auth_unix client: */ |
| 1296 | exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle); |
| 1297 | if (PTR_ERR(exp) == -ENOENT) |
| 1298 | goto gss; |
| 1299 | if (IS_ERR(exp)) |
| 1300 | return exp; |
| 1301 | /* If it has secinfo, assume there are no gss/... clients */ |
| 1302 | if (exp->ex_nflavors > 0) |
| 1303 | return exp; |
| 1304 | gss: |
| 1305 | /* Otherwise, try falling back on gss client */ |
| 1306 | if (rqstp->rq_gssclient == NULL) |
| 1307 | return exp; |
| 1308 | gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv, |
| 1309 | &rqstp->rq_chandle); |
| 1310 | if (PTR_ERR(gssexp) == -ENOENT) |
| 1311 | return exp; |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 1312 | if (!IS_ERR(exp)) |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1313 | exp_put(exp); |
| 1314 | return gssexp; |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1315 | } |
| 1316 | |
| 1317 | struct svc_export * |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 1318 | rqst_exp_parent(struct svc_rqst *rqstp, struct path *path) |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1319 | { |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 1320 | struct dentry *saved = dget(path->dentry); |
| 1321 | struct svc_export *exp = rqst_exp_get_by_name(rqstp, path); |
J. Bruce Fields | 3ab4d8b | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1322 | |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 1323 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) { |
| 1324 | struct dentry *parent = dget_parent(path->dentry); |
| 1325 | dput(path->dentry); |
| 1326 | path->dentry = parent; |
| 1327 | exp = rqst_exp_get_by_name(rqstp, path); |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1328 | } |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 1329 | dput(path->dentry); |
| 1330 | path->dentry = saved; |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1331 | return exp; |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1332 | } |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1333 | |
J. Bruce Fields | f39bde2 | 2009-09-27 14:41:43 -0400 | [diff] [blame] | 1334 | static struct svc_export *find_fsidzero_export(struct svc_rqst *rqstp) |
| 1335 | { |
J. Bruce Fields | f39bde2 | 2009-09-27 14:41:43 -0400 | [diff] [blame] | 1336 | u32 fsidv[2]; |
| 1337 | |
| 1338 | mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL); |
| 1339 | |
J. Bruce Fields | 260c64d | 2010-02-08 13:42:26 -0500 | [diff] [blame] | 1340 | return rqst_exp_find(rqstp, FSID_NUM, fsidv); |
J. Bruce Fields | f39bde2 | 2009-09-27 14:41:43 -0400 | [diff] [blame] | 1341 | } |
| 1342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | /* |
| 1344 | * Called when we need the filehandle for the root of the pseudofs, |
| 1345 | * for a given NFSv4 client. The root is defined to be the |
| 1346 | * export point with fsid==0 |
| 1347 | */ |
Al Viro | c7afef1 | 2006-10-19 23:29:02 -0700 | [diff] [blame] | 1348 | __be32 |
J. Bruce Fields | df547ef | 2007-07-17 04:04:43 -0700 | [diff] [blame] | 1349 | exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | { |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1351 | struct svc_export *exp; |
Al Viro | c7afef1 | 2006-10-19 23:29:02 -0700 | [diff] [blame] | 1352 | __be32 rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | |
J. Bruce Fields | f39bde2 | 2009-09-27 14:41:43 -0400 | [diff] [blame] | 1354 | exp = find_fsidzero_export(rqstp); |
J.Bruce Fields | 6899320 | 2006-12-13 00:35:23 -0800 | [diff] [blame] | 1355 | if (IS_ERR(exp)) |
| 1356 | return nfserrno(PTR_ERR(exp)); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 1357 | rv = fh_compose(fhp, exp, exp->ex_path.dentry, NULL); |
Andy Adamson | 32c1eb0 | 2007-07-17 04:04:48 -0700 | [diff] [blame] | 1358 | if (rv) |
| 1359 | goto out; |
| 1360 | rv = check_nfsd_access(exp, rqstp); |
Trond Myklebust | 2671a4b | 2009-09-02 16:48:32 -0400 | [diff] [blame] | 1361 | if (rv) |
| 1362 | fh_put(fhp); |
Andy Adamson | 32c1eb0 | 2007-07-17 04:04:48 -0700 | [diff] [blame] | 1363 | out: |
J.Bruce Fields | d0ebd9c | 2006-10-04 02:16:10 -0700 | [diff] [blame] | 1364 | exp_put(exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | return rv; |
| 1366 | } |
| 1367 | |
| 1368 | /* Iterator */ |
| 1369 | |
| 1370 | static void *e_start(struct seq_file *m, loff_t *pos) |
Josh Triplett | 896440d | 2006-10-02 02:17:50 -0700 | [diff] [blame] | 1371 | __acquires(svc_export_cache.hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | { |
| 1373 | loff_t n = *pos; |
| 1374 | unsigned hash, export; |
| 1375 | struct cache_head *ch; |
| 1376 | |
| 1377 | exp_readlock(); |
| 1378 | read_lock(&svc_export_cache.hash_lock); |
| 1379 | if (!n--) |
Greg Banks | bc6f02e | 2006-10-02 02:17:49 -0700 | [diff] [blame] | 1380 | return SEQ_START_TOKEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | hash = n >> 32; |
| 1382 | export = n & ((1LL<<32) - 1); |
| 1383 | |
| 1384 | |
| 1385 | for (ch=export_table[hash]; ch; ch=ch->next) |
| 1386 | if (!export--) |
| 1387 | return ch; |
| 1388 | n &= ~((1LL<<32) - 1); |
| 1389 | do { |
| 1390 | hash++; |
| 1391 | n += 1LL<<32; |
| 1392 | } while(hash < EXPORT_HASHMAX && export_table[hash]==NULL); |
| 1393 | if (hash >= EXPORT_HASHMAX) |
| 1394 | return NULL; |
| 1395 | *pos = n+1; |
| 1396 | return export_table[hash]; |
| 1397 | } |
| 1398 | |
| 1399 | static void *e_next(struct seq_file *m, void *p, loff_t *pos) |
| 1400 | { |
| 1401 | struct cache_head *ch = p; |
| 1402 | int hash = (*pos >> 32); |
| 1403 | |
Greg Banks | bc6f02e | 2006-10-02 02:17:49 -0700 | [diff] [blame] | 1404 | if (p == SEQ_START_TOKEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | hash = 0; |
| 1406 | else if (ch->next == NULL) { |
| 1407 | hash++; |
| 1408 | *pos += 1LL<<32; |
| 1409 | } else { |
| 1410 | ++*pos; |
| 1411 | return ch->next; |
| 1412 | } |
| 1413 | *pos &= ~((1LL<<32) - 1); |
| 1414 | while (hash < EXPORT_HASHMAX && export_table[hash] == NULL) { |
| 1415 | hash++; |
| 1416 | *pos += 1LL<<32; |
| 1417 | } |
| 1418 | if (hash >= EXPORT_HASHMAX) |
| 1419 | return NULL; |
| 1420 | ++*pos; |
| 1421 | return export_table[hash]; |
| 1422 | } |
| 1423 | |
| 1424 | static void e_stop(struct seq_file *m, void *p) |
Josh Triplett | 896440d | 2006-10-02 02:17:50 -0700 | [diff] [blame] | 1425 | __releases(svc_export_cache.hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | { |
| 1427 | read_unlock(&svc_export_cache.hash_lock); |
| 1428 | exp_readunlock(); |
| 1429 | } |
| 1430 | |
| 1431 | static struct flags { |
| 1432 | int flag; |
| 1433 | char *name[2]; |
| 1434 | } expflags[] = { |
| 1435 | { NFSEXP_READONLY, {"ro", "rw"}}, |
| 1436 | { NFSEXP_INSECURE_PORT, {"insecure", ""}}, |
| 1437 | { NFSEXP_ROOTSQUASH, {"root_squash", "no_root_squash"}}, |
| 1438 | { NFSEXP_ALLSQUASH, {"all_squash", ""}}, |
| 1439 | { NFSEXP_ASYNC, {"async", "sync"}}, |
| 1440 | { NFSEXP_GATHERED_WRITES, {"wdelay", "no_wdelay"}}, |
| 1441 | { NFSEXP_NOHIDE, {"nohide", ""}}, |
| 1442 | { NFSEXP_CROSSMOUNT, {"crossmnt", ""}}, |
| 1443 | { NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}}, |
| 1444 | { NFSEXP_NOAUTHNLM, {"insecure_locks", ""}}, |
Steve Dickson | eb4c86c | 2009-09-09 14:58:22 -0400 | [diff] [blame] | 1445 | { NFSEXP_V4ROOT, {"v4root", ""}}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | { 0, {"", ""}} |
| 1447 | }; |
| 1448 | |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1449 | static void show_expflags(struct seq_file *m, int flags, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | struct flags *flg; |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1452 | int state, first = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | |
| 1454 | for (flg = expflags; flg->flag; flg++) { |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1455 | if (flg->flag & ~mask) |
| 1456 | continue; |
| 1457 | state = (flg->flag & flags) ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | if (*flg->name[state]) |
| 1459 | seq_printf(m, "%s%s", first++?",":"", flg->name[state]); |
| 1460 | } |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1461 | } |
| 1462 | |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1463 | static void show_secinfo_flags(struct seq_file *m, int flags) |
| 1464 | { |
| 1465 | seq_printf(m, ","); |
| 1466 | show_expflags(m, flags, NFSEXP_SECINFO_FLAGS); |
| 1467 | } |
| 1468 | |
J. Bruce Fields | 74ec1e1 | 2010-09-24 17:43:59 -0400 | [diff] [blame] | 1469 | static bool secinfo_flags_equal(int f, int g) |
| 1470 | { |
| 1471 | f &= NFSEXP_SECINFO_FLAGS; |
| 1472 | g &= NFSEXP_SECINFO_FLAGS; |
| 1473 | return f == g; |
| 1474 | } |
| 1475 | |
| 1476 | static int show_secinfo_run(struct seq_file *m, struct exp_flavor_info **fp, struct exp_flavor_info *end) |
| 1477 | { |
| 1478 | int flags; |
| 1479 | |
| 1480 | flags = (*fp)->flags; |
| 1481 | seq_printf(m, ",sec=%d", (*fp)->pseudoflavor); |
| 1482 | (*fp)++; |
| 1483 | while (*fp != end && secinfo_flags_equal(flags, (*fp)->flags)) { |
| 1484 | seq_printf(m, ":%d", (*fp)->pseudoflavor); |
| 1485 | (*fp)++; |
| 1486 | } |
| 1487 | return flags; |
| 1488 | } |
| 1489 | |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1490 | static void show_secinfo(struct seq_file *m, struct svc_export *exp) |
| 1491 | { |
| 1492 | struct exp_flavor_info *f; |
| 1493 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; |
J. Bruce Fields | 74ec1e1 | 2010-09-24 17:43:59 -0400 | [diff] [blame] | 1494 | int flags; |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1495 | |
| 1496 | if (exp->ex_nflavors == 0) |
| 1497 | return; |
J. Bruce Fields | 74ec1e1 | 2010-09-24 17:43:59 -0400 | [diff] [blame] | 1498 | f = exp->ex_flavors; |
| 1499 | flags = show_secinfo_run(m, &f, end); |
| 1500 | if (!secinfo_flags_equal(flags, exp->ex_flags)) |
| 1501 | show_secinfo_flags(m, flags); |
| 1502 | while (f != end) { |
| 1503 | flags = show_secinfo_run(m, &f, end); |
| 1504 | show_secinfo_flags(m, flags); |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1505 | } |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1506 | } |
| 1507 | |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1508 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
| 1509 | uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc) |
| 1510 | { |
| 1511 | show_expflags(m, flag, NFSEXP_ALLFLAGS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | if (flag & NFSEXP_FSID) |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1513 | seq_printf(m, ",fsid=%d", fsid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | if (anonu != (uid_t)-2 && anonu != (0x10000-2)) |
J. Bruce Fields | 3e63516 | 2007-07-21 04:37:30 -0700 | [diff] [blame] | 1515 | seq_printf(m, ",anonuid=%u", anonu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | if (anong != (gid_t)-2 && anong != (0x10000-2)) |
J. Bruce Fields | 3e63516 | 2007-07-21 04:37:30 -0700 | [diff] [blame] | 1517 | seq_printf(m, ",anongid=%u", anong); |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 1518 | if (fsloc && fsloc->locations_count > 0) { |
| 1519 | char *loctype = (fsloc->migrated) ? "refer" : "replicas"; |
| 1520 | int i; |
| 1521 | |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1522 | seq_printf(m, ",%s=", loctype); |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 1523 | seq_escape(m, fsloc->locations[0].path, ",;@ \t\n\\"); |
| 1524 | seq_putc(m, '@'); |
| 1525 | seq_escape(m, fsloc->locations[0].hosts, ",;@ \t\n\\"); |
| 1526 | for (i = 1; i < fsloc->locations_count; i++) { |
| 1527 | seq_putc(m, ';'); |
| 1528 | seq_escape(m, fsloc->locations[i].path, ",;@ \t\n\\"); |
| 1529 | seq_putc(m, '@'); |
| 1530 | seq_escape(m, fsloc->locations[i].hosts, ",;@ \t\n\\"); |
| 1531 | } |
| 1532 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | } |
| 1534 | |
| 1535 | static int e_show(struct seq_file *m, void *p) |
| 1536 | { |
| 1537 | struct cache_head *cp = p; |
| 1538 | struct svc_export *exp = container_of(cp, struct svc_export, h); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | |
Greg Banks | bc6f02e | 2006-10-02 02:17:49 -0700 | [diff] [blame] | 1540 | if (p == SEQ_START_TOKEN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | seq_puts(m, "# Version 1.1\n"); |
| 1542 | seq_puts(m, "# Path Client(Flags) # IPs\n"); |
| 1543 | return 0; |
| 1544 | } |
| 1545 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | cache_get(&exp->h); |
| 1547 | if (cache_check(&svc_export_cache, &exp->h, NULL)) |
| 1548 | return 0; |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 1549 | cache_put(&exp->h, &svc_export_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | return svc_export_show(m, &svc_export_cache, cp); |
| 1551 | } |
| 1552 | |
James Morris | 88e9d34 | 2009-09-22 16:43:43 -0700 | [diff] [blame] | 1553 | const struct seq_operations nfs_exports_op = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | .start = e_start, |
| 1555 | .next = e_next, |
| 1556 | .stop = e_stop, |
| 1557 | .show = e_show, |
| 1558 | }; |
| 1559 | |
NeilBrown | 1e14056 | 2010-09-22 12:55:07 +1000 | [diff] [blame] | 1560 | #ifdef CONFIG_NFSD_DEPRECATED |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | /* |
| 1562 | * Add or modify a client. |
| 1563 | * Change requests may involve the list of host addresses. The list of |
| 1564 | * exports and possibly existing uid maps are left untouched. |
| 1565 | */ |
| 1566 | int |
| 1567 | exp_addclient(struct nfsctl_client *ncp) |
| 1568 | { |
| 1569 | struct auth_domain *dom; |
| 1570 | int i, err; |
Aurélien Charbon | f15364b | 2008-01-18 15:50:56 +0100 | [diff] [blame] | 1571 | struct in6_addr addr6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | |
| 1573 | /* First, consistency check. */ |
| 1574 | err = -EINVAL; |
| 1575 | if (! exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX)) |
| 1576 | goto out; |
| 1577 | if (ncp->cl_naddr > NFSCLNT_ADDRMAX) |
| 1578 | goto out; |
| 1579 | |
| 1580 | /* Lock the hashtable */ |
| 1581 | exp_writelock(); |
| 1582 | |
| 1583 | dom = unix_domain_find(ncp->cl_ident); |
| 1584 | |
| 1585 | err = -ENOMEM; |
| 1586 | if (!dom) |
| 1587 | goto out_unlock; |
| 1588 | |
| 1589 | /* Insert client into hashtable. */ |
Aurélien Charbon | f15364b | 2008-01-18 15:50:56 +0100 | [diff] [blame] | 1590 | for (i = 0; i < ncp->cl_naddr; i++) { |
| 1591 | ipv6_addr_set_v4mapped(ncp->cl_addrlist[i].s_addr, &addr6); |
Pavel Emelyanov | 352114f | 2010-09-27 13:59:48 +0400 | [diff] [blame] | 1592 | auth_unix_add_addr(&init_net, &addr6, dom); |
Aurélien Charbon | f15364b | 2008-01-18 15:50:56 +0100 | [diff] [blame] | 1593 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | auth_unix_forget_old(dom); |
| 1595 | auth_domain_put(dom); |
| 1596 | |
| 1597 | err = 0; |
| 1598 | |
| 1599 | out_unlock: |
| 1600 | exp_writeunlock(); |
| 1601 | out: |
| 1602 | return err; |
| 1603 | } |
| 1604 | |
| 1605 | /* |
| 1606 | * Delete a client given an identifier. |
| 1607 | */ |
| 1608 | int |
| 1609 | exp_delclient(struct nfsctl_client *ncp) |
| 1610 | { |
| 1611 | int err; |
| 1612 | struct auth_domain *dom; |
| 1613 | |
| 1614 | err = -EINVAL; |
| 1615 | if (!exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX)) |
| 1616 | goto out; |
| 1617 | |
| 1618 | /* Lock the hashtable */ |
| 1619 | exp_writelock(); |
| 1620 | |
| 1621 | dom = auth_domain_find(ncp->cl_ident); |
| 1622 | /* just make sure that no addresses work |
| 1623 | * and that it will expire soon |
| 1624 | */ |
| 1625 | if (dom) { |
| 1626 | err = auth_unix_forget_old(dom); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | auth_domain_put(dom); |
| 1628 | } |
| 1629 | |
| 1630 | exp_writeunlock(); |
| 1631 | out: |
| 1632 | return err; |
| 1633 | } |
| 1634 | |
| 1635 | /* |
| 1636 | * Verify that string is non-empty and does not exceed max length. |
| 1637 | */ |
| 1638 | static int |
| 1639 | exp_verify_string(char *cp, int max) |
| 1640 | { |
| 1641 | int i; |
| 1642 | |
| 1643 | for (i = 0; i < max; i++) |
| 1644 | if (!cp[i]) |
| 1645 | return i; |
| 1646 | cp[i] = 0; |
| 1647 | printk(KERN_NOTICE "nfsd: couldn't validate string %s\n", cp); |
| 1648 | return 0; |
| 1649 | } |
NeilBrown | 1e14056 | 2010-09-22 12:55:07 +1000 | [diff] [blame] | 1650 | #endif /* CONFIG_NFSD_DEPRECATED */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | |
| 1652 | /* |
| 1653 | * Initialize the exports module. |
| 1654 | */ |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1655 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | nfsd_export_init(void) |
| 1657 | { |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1658 | int rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | dprintk("nfsd: initializing export module.\n"); |
| 1660 | |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1661 | rv = cache_register(&svc_export_cache); |
| 1662 | if (rv) |
| 1663 | return rv; |
| 1664 | rv = cache_register(&svc_expkey_cache); |
| 1665 | if (rv) |
| 1666 | cache_unregister(&svc_export_cache); |
| 1667 | return rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | |
| 1669 | } |
| 1670 | |
| 1671 | /* |
| 1672 | * Flush exports table - called when last nfsd thread is killed |
| 1673 | */ |
| 1674 | void |
| 1675 | nfsd_export_flush(void) |
| 1676 | { |
| 1677 | exp_writelock(); |
| 1678 | cache_purge(&svc_expkey_cache); |
| 1679 | cache_purge(&svc_export_cache); |
| 1680 | exp_writeunlock(); |
| 1681 | } |
| 1682 | |
| 1683 | /* |
| 1684 | * Shutdown the exports module. |
| 1685 | */ |
| 1686 | void |
| 1687 | nfsd_export_shutdown(void) |
| 1688 | { |
| 1689 | |
| 1690 | dprintk("nfsd: shutting down export module.\n"); |
| 1691 | |
| 1692 | exp_writelock(); |
| 1693 | |
J. Bruce Fields | df95a9d | 2007-11-08 16:09:59 -0500 | [diff] [blame] | 1694 | cache_unregister(&svc_expkey_cache); |
| 1695 | cache_unregister(&svc_export_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | svcauth_unix_purge(); |
| 1697 | |
| 1698 | exp_writeunlock(); |
| 1699 | dprintk("nfsd: export shutdown complete.\n"); |
| 1700 | } |