David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Steven Whitehouse | 3a8a9a1 | 2006-05-18 15:09:15 -0400 | [diff] [blame] | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 4 | * |
| 5 | * This copyrighted material is made available to anyone wishing to use, |
| 6 | * modify, copy, or redistribute it subject to the terms and conditions |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 10 | #include <linux/slab.h> |
| 11 | #include <linux/spinlock.h> |
| 12 | #include <linux/completion.h> |
| 13 | #include <linux/buffer_head.h> |
| 14 | #include <linux/xattr.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 15 | #include <linux/gfs2_ondisk.h> |
Christoph Hellwig | e01580b | 2013-12-20 05:16:52 -0800 | [diff] [blame] | 16 | #include <linux/posix_acl_xattr.h> |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 17 | #include <linux/uaccess.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 18 | |
| 19 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 20 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 21 | #include "acl.h" |
Steven Whitehouse | 307cf6e | 2009-08-26 18:51:04 +0100 | [diff] [blame] | 22 | #include "xattr.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 23 | #include "glock.h" |
| 24 | #include "inode.h" |
| 25 | #include "meta_io.h" |
| 26 | #include "quota.h" |
| 27 | #include "rgrp.h" |
Bob Peterson | 27c3b41 | 2017-08-18 09:15:13 -0500 | [diff] [blame] | 28 | #include "super.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 29 | #include "trans.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 30 | #include "util.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 31 | |
| 32 | /** |
| 33 | * ea_calc_size - returns the acutal number of bytes the request will take up |
| 34 | * (not counting any unstuffed data blocks) |
| 35 | * @sdp: |
| 36 | * @er: |
| 37 | * @size: |
| 38 | * |
| 39 | * Returns: 1 if the EA should be stuffed |
| 40 | */ |
| 41 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 42 | static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 43 | unsigned int *size) |
| 44 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 45 | unsigned int jbsize = sdp->sd_jbsize; |
| 46 | |
| 47 | /* Stuffed */ |
| 48 | *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8); |
| 49 | |
| 50 | if (*size <= jbsize) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 51 | return 1; |
| 52 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 53 | /* Unstuffed */ |
| 54 | *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + |
| 55 | (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 60 | static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 61 | { |
| 62 | unsigned int size; |
| 63 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 64 | if (dsize > GFS2_EA_MAX_DATA_LEN) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 65 | return -ERANGE; |
| 66 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 67 | ea_calc_size(sdp, nsize, dsize, &size); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 68 | |
| 69 | /* This can only happen with 512 byte blocks */ |
| 70 | if (size > sdp->sd_jbsize) |
| 71 | return -ERANGE; |
| 72 | |
| 73 | return 0; |
| 74 | } |
| 75 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 76 | typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 77 | struct gfs2_ea_header *ea, |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 78 | struct gfs2_ea_header *prev, void *private); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 79 | |
| 80 | static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| 81 | ea_call_t ea_call, void *data) |
| 82 | { |
| 83 | struct gfs2_ea_header *ea, *prev = NULL; |
| 84 | int error = 0; |
| 85 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 86 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 87 | return -EIO; |
| 88 | |
| 89 | for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) { |
| 90 | if (!GFS2_EA_REC_LEN(ea)) |
| 91 | goto fail; |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 92 | if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <= |
| 93 | bh->b_data + bh->b_size)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 94 | goto fail; |
| 95 | if (!GFS2_EATYPE_VALID(ea->ea_type)) |
| 96 | goto fail; |
| 97 | |
| 98 | error = ea_call(ip, bh, ea, prev, data); |
| 99 | if (error) |
| 100 | return error; |
| 101 | |
| 102 | if (GFS2_EA_IS_LAST(ea)) { |
| 103 | if ((char *)GFS2_EA2NEXT(ea) != |
| 104 | bh->b_data + bh->b_size) |
| 105 | goto fail; |
| 106 | break; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | return error; |
| 111 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 112 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 113 | gfs2_consist_inode(ip); |
| 114 | return -EIO; |
| 115 | } |
| 116 | |
| 117 | static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) |
| 118 | { |
| 119 | struct buffer_head *bh, *eabh; |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 120 | __be64 *eablk, *end; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 121 | int error; |
| 122 | |
Andreas Gruenbacher | c8d5770 | 2015-11-11 15:00:35 -0600 | [diff] [blame] | 123 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 124 | if (error) |
| 125 | return error; |
| 126 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 127 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 128 | error = ea_foreach_i(ip, bh, ea_call, data); |
| 129 | goto out; |
| 130 | } |
| 131 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 132 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 133 | error = -EIO; |
| 134 | goto out; |
| 135 | } |
| 136 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 137 | eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 138 | end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 139 | |
| 140 | for (; eablk < end; eablk++) { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 141 | u64 bn; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 142 | |
| 143 | if (!*eablk) |
| 144 | break; |
| 145 | bn = be64_to_cpu(*eablk); |
| 146 | |
Andreas Gruenbacher | c8d5770 | 2015-11-11 15:00:35 -0600 | [diff] [blame] | 147 | error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, 0, &eabh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 148 | if (error) |
| 149 | break; |
| 150 | error = ea_foreach_i(ip, eabh, ea_call, data); |
| 151 | brelse(eabh); |
| 152 | if (error) |
| 153 | break; |
| 154 | } |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 155 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 156 | brelse(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 157 | return error; |
| 158 | } |
| 159 | |
| 160 | struct ea_find { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 161 | int type; |
| 162 | const char *name; |
| 163 | size_t namel; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 164 | struct gfs2_ea_location *ef_el; |
| 165 | }; |
| 166 | |
| 167 | static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| 168 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| 169 | void *private) |
| 170 | { |
| 171 | struct ea_find *ef = private; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 172 | |
| 173 | if (ea->ea_type == GFS2_EATYPE_UNUSED) |
| 174 | return 0; |
| 175 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 176 | if (ea->ea_type == ef->type) { |
| 177 | if (ea->ea_name_len == ef->namel && |
| 178 | !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 179 | struct gfs2_ea_location *el = ef->ef_el; |
| 180 | get_bh(bh); |
| 181 | el->el_bh = bh; |
| 182 | el->el_ea = ea; |
| 183 | el->el_prev = prev; |
| 184 | return 1; |
| 185 | } |
| 186 | } |
| 187 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 188 | return 0; |
| 189 | } |
| 190 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 191 | static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name, |
| 192 | struct gfs2_ea_location *el) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 193 | { |
| 194 | struct ea_find ef; |
| 195 | int error; |
| 196 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 197 | ef.type = type; |
| 198 | ef.name = name; |
| 199 | ef.namel = strlen(name); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 200 | ef.ef_el = el; |
| 201 | |
| 202 | memset(el, 0, sizeof(struct gfs2_ea_location)); |
| 203 | |
| 204 | error = ea_foreach(ip, ea_find_i, &ef); |
| 205 | if (error > 0) |
| 206 | return 0; |
| 207 | |
| 208 | return error; |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * ea_dealloc_unstuffed - |
| 213 | * @ip: |
| 214 | * @bh: |
| 215 | * @ea: |
| 216 | * @prev: |
| 217 | * @private: |
| 218 | * |
| 219 | * Take advantage of the fact that all unstuffed blocks are |
| 220 | * allocated from the same RG. But watch, this may not always |
| 221 | * be true. |
| 222 | * |
| 223 | * Returns: errno |
| 224 | */ |
| 225 | |
| 226 | static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, |
| 227 | struct gfs2_ea_header *ea, |
| 228 | struct gfs2_ea_header *prev, void *private) |
| 229 | { |
| 230 | int *leave = private; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 231 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 232 | struct gfs2_rgrpd *rgd; |
| 233 | struct gfs2_holder rg_gh; |
| 234 | struct buffer_head *dibh; |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 235 | __be64 *dataptrs; |
| 236 | u64 bn = 0; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 237 | u64 bstart = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 238 | unsigned int blen = 0; |
| 239 | unsigned int blks = 0; |
| 240 | unsigned int x; |
| 241 | int error; |
| 242 | |
Bob Peterson | 5e2f7d6 | 2012-04-04 22:11:16 -0400 | [diff] [blame] | 243 | error = gfs2_rindex_update(sdp); |
| 244 | if (error) |
| 245 | return error; |
| 246 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 247 | if (GFS2_EA_IS_STUFFED(ea)) |
| 248 | return 0; |
| 249 | |
| 250 | dataptrs = GFS2_EA2DATAPTRS(ea); |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 251 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 252 | if (*dataptrs) { |
| 253 | blks++; |
| 254 | bn = be64_to_cpu(*dataptrs); |
| 255 | } |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 256 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 257 | if (!blks) |
| 258 | return 0; |
| 259 | |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 260 | rgd = gfs2_blk2rgrpd(sdp, bn, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 261 | if (!rgd) { |
| 262 | gfs2_consist_inode(ip); |
| 263 | return -EIO; |
| 264 | } |
| 265 | |
| 266 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); |
| 267 | if (error) |
| 268 | return error; |
| 269 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 270 | error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE + |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 271 | RES_EATTR + RES_STATFS + RES_QUOTA, blks); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 272 | if (error) |
| 273 | goto out_gunlock; |
| 274 | |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 275 | gfs2_trans_add_meta(ip->i_gl, bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 276 | |
| 277 | dataptrs = GFS2_EA2DATAPTRS(ea); |
| 278 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { |
| 279 | if (!*dataptrs) |
| 280 | break; |
| 281 | bn = be64_to_cpu(*dataptrs); |
| 282 | |
| 283 | if (bstart + blen == bn) |
| 284 | blen++; |
| 285 | else { |
| 286 | if (bstart) |
| 287 | gfs2_free_meta(ip, bstart, blen); |
| 288 | bstart = bn; |
| 289 | blen = 1; |
| 290 | } |
| 291 | |
| 292 | *dataptrs = 0; |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 293 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 294 | } |
| 295 | if (bstart) |
| 296 | gfs2_free_meta(ip, bstart, blen); |
| 297 | |
| 298 | if (prev && !leave) { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 299 | u32 len; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 300 | |
| 301 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| 302 | prev->ea_rec_len = cpu_to_be32(len); |
| 303 | |
| 304 | if (GFS2_EA_IS_LAST(ea)) |
| 305 | prev->ea_flags |= GFS2_EAFLAG_LAST; |
| 306 | } else { |
| 307 | ea->ea_type = GFS2_EATYPE_UNUSED; |
| 308 | ea->ea_num_ptrs = 0; |
| 309 | } |
| 310 | |
| 311 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 312 | if (!error) { |
Deepa Dinamani | 078cd82 | 2016-09-14 07:48:04 -0700 | [diff] [blame] | 313 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 314 | gfs2_trans_add_meta(ip->i_gl, dibh); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 315 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 316 | brelse(dibh); |
| 317 | } |
| 318 | |
| 319 | gfs2_trans_end(sdp); |
| 320 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 321 | out_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 322 | gfs2_glock_dq_uninit(&rg_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 323 | return error; |
| 324 | } |
| 325 | |
| 326 | static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, |
| 327 | struct gfs2_ea_header *ea, |
| 328 | struct gfs2_ea_header *prev, int leave) |
| 329 | { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 330 | int error; |
| 331 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 332 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
| 333 | if (error) |
| 334 | return error; |
| 335 | |
Eric W. Biederman | f4108a6 | 2013-01-31 17:49:26 -0800 | [diff] [blame] | 336 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 337 | if (error) |
| 338 | goto out_alloc; |
| 339 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 340 | error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 341 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 342 | gfs2_quota_unhold(ip); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 343 | out_alloc: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 344 | return error; |
| 345 | } |
| 346 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 347 | struct ea_list { |
| 348 | struct gfs2_ea_request *ei_er; |
| 349 | unsigned int ei_size; |
| 350 | }; |
| 351 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 352 | static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea) |
| 353 | { |
| 354 | switch (ea->ea_type) { |
| 355 | case GFS2_EATYPE_USR: |
| 356 | return 5 + ea->ea_name_len + 1; |
| 357 | case GFS2_EATYPE_SYS: |
| 358 | return 7 + ea->ea_name_len + 1; |
| 359 | case GFS2_EATYPE_SECURITY: |
| 360 | return 9 + ea->ea_name_len + 1; |
| 361 | default: |
| 362 | return 0; |
| 363 | } |
| 364 | } |
| 365 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 366 | static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| 367 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| 368 | void *private) |
| 369 | { |
| 370 | struct ea_list *ei = private; |
| 371 | struct gfs2_ea_request *er = ei->ei_er; |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 372 | unsigned int ea_size = gfs2_ea_strlen(ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 373 | |
| 374 | if (ea->ea_type == GFS2_EATYPE_UNUSED) |
| 375 | return 0; |
| 376 | |
| 377 | if (er->er_data_len) { |
Steven Whitehouse | 01eb7c0 | 2006-06-06 17:31:30 -0400 | [diff] [blame] | 378 | char *prefix = NULL; |
| 379 | unsigned int l = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 380 | char c = 0; |
| 381 | |
| 382 | if (ei->ei_size + ea_size > er->er_data_len) |
| 383 | return -ERANGE; |
| 384 | |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 385 | switch (ea->ea_type) { |
| 386 | case GFS2_EATYPE_USR: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 387 | prefix = "user."; |
| 388 | l = 5; |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 389 | break; |
| 390 | case GFS2_EATYPE_SYS: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 391 | prefix = "system."; |
| 392 | l = 7; |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 393 | break; |
| 394 | case GFS2_EATYPE_SECURITY: |
| 395 | prefix = "security."; |
| 396 | l = 9; |
| 397 | break; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 398 | } |
| 399 | |
Steven Whitehouse | 01eb7c0 | 2006-06-06 17:31:30 -0400 | [diff] [blame] | 400 | BUG_ON(l == 0); |
| 401 | |
Steven Whitehouse | 90cdd20 | 2006-05-22 10:36:25 -0400 | [diff] [blame] | 402 | memcpy(er->er_data + ei->ei_size, prefix, l); |
| 403 | memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 404 | ea->ea_name_len); |
Steven Whitehouse | 90cdd20 | 2006-05-22 10:36:25 -0400 | [diff] [blame] | 405 | memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 406 | } |
| 407 | |
| 408 | ei->ei_size += ea_size; |
| 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | /** |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 414 | * gfs2_listxattr - List gfs2 extended attributes |
| 415 | * @dentry: The dentry whose inode we are interested in |
| 416 | * @buffer: The buffer to write the results |
| 417 | * @size: The size of the buffer |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 418 | * |
| 419 | * Returns: actual size of data on success, -errno on error |
| 420 | */ |
| 421 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 422 | ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 423 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 424 | struct gfs2_inode *ip = GFS2_I(d_inode(dentry)); |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 425 | struct gfs2_ea_request er; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 426 | struct gfs2_holder i_gh; |
| 427 | int error; |
| 428 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 429 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
| 430 | if (size) { |
| 431 | er.er_data = buffer; |
| 432 | er.er_data_len = size; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 433 | } |
| 434 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 435 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 436 | if (error) |
| 437 | return error; |
| 438 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 439 | if (ip->i_eattr) { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 440 | struct ea_list ei = { .ei_er = &er, .ei_size = 0 }; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 441 | |
| 442 | error = ea_foreach(ip, ea_list_i, &ei); |
| 443 | if (!error) |
| 444 | error = ei.ei_size; |
| 445 | } |
| 446 | |
| 447 | gfs2_glock_dq_uninit(&i_gh); |
| 448 | |
| 449 | return error; |
| 450 | } |
| 451 | |
| 452 | /** |
Steven Whitehouse | 1f98169 | 2012-07-26 11:26:36 +0100 | [diff] [blame] | 453 | * ea_iter_unstuffed - copies the unstuffed xattr data to/from the |
| 454 | * request buffer |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 455 | * @ip: The GFS2 inode |
| 456 | * @ea: The extended attribute header structure |
Steven Whitehouse | 1f98169 | 2012-07-26 11:26:36 +0100 | [diff] [blame] | 457 | * @din: The data to be copied in |
| 458 | * @dout: The data to be copied out (one of din,dout will be NULL) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 459 | * |
| 460 | * Returns: errno |
| 461 | */ |
| 462 | |
Steven Whitehouse | 1f98169 | 2012-07-26 11:26:36 +0100 | [diff] [blame] | 463 | static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, |
| 464 | const char *din, char *dout) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 465 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 466 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 467 | struct buffer_head **bh; |
| 468 | unsigned int amount = GFS2_EA_DATA_LEN(ea); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 469 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 470 | __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 471 | unsigned int x; |
| 472 | int error = 0; |
Steven Whitehouse | 1f98169 | 2012-07-26 11:26:36 +0100 | [diff] [blame] | 473 | unsigned char *pos; |
| 474 | unsigned cp_size; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 475 | |
Josef Bacik | 16c5f06 | 2008-04-09 09:33:41 -0400 | [diff] [blame] | 476 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 477 | if (!bh) |
| 478 | return -ENOMEM; |
| 479 | |
| 480 | for (x = 0; x < nptrs; x++) { |
Andreas Gruenbacher | c8d5770 | 2015-11-11 15:00:35 -0600 | [diff] [blame] | 481 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, 0, |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 482 | bh + x); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 483 | if (error) { |
| 484 | while (x--) |
| 485 | brelse(bh[x]); |
| 486 | goto out; |
| 487 | } |
| 488 | dataptrs++; |
| 489 | } |
| 490 | |
| 491 | for (x = 0; x < nptrs; x++) { |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 492 | error = gfs2_meta_wait(sdp, bh[x]); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 493 | if (error) { |
| 494 | for (; x < nptrs; x++) |
| 495 | brelse(bh[x]); |
| 496 | goto out; |
| 497 | } |
| 498 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { |
| 499 | for (; x < nptrs; x++) |
| 500 | brelse(bh[x]); |
| 501 | error = -EIO; |
| 502 | goto out; |
| 503 | } |
| 504 | |
Steven Whitehouse | 1f98169 | 2012-07-26 11:26:36 +0100 | [diff] [blame] | 505 | pos = bh[x]->b_data + sizeof(struct gfs2_meta_header); |
| 506 | cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize; |
| 507 | |
| 508 | if (dout) { |
| 509 | memcpy(dout, pos, cp_size); |
| 510 | dout += sdp->sd_jbsize; |
| 511 | } |
| 512 | |
| 513 | if (din) { |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 514 | gfs2_trans_add_meta(ip->i_gl, bh[x]); |
Steven Whitehouse | 1f98169 | 2012-07-26 11:26:36 +0100 | [diff] [blame] | 515 | memcpy(pos, din, cp_size); |
| 516 | din += sdp->sd_jbsize; |
| 517 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 518 | |
| 519 | amount -= sdp->sd_jbsize; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 520 | brelse(bh[x]); |
| 521 | } |
| 522 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 523 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 524 | kfree(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 525 | return error; |
| 526 | } |
| 527 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 528 | static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, |
| 529 | char *data, size_t size) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 530 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 531 | int ret; |
| 532 | size_t len = GFS2_EA_DATA_LEN(el->el_ea); |
| 533 | if (len > size) |
| 534 | return -ERANGE; |
| 535 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 536 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 537 | memcpy(data, GFS2_EA2DATA(el->el_ea), len); |
| 538 | return len; |
| 539 | } |
Steven Whitehouse | 1f98169 | 2012-07-26 11:26:36 +0100 | [diff] [blame] | 540 | ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data); |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 541 | if (ret < 0) |
| 542 | return ret; |
| 543 | return len; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 544 | } |
| 545 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 546 | int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata) |
| 547 | { |
| 548 | struct gfs2_ea_location el; |
| 549 | int error; |
| 550 | int len; |
| 551 | char *data; |
| 552 | |
| 553 | error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el); |
| 554 | if (error) |
| 555 | return error; |
| 556 | if (!el.el_ea) |
| 557 | goto out; |
| 558 | if (!GFS2_EA_DATA_LEN(el.el_ea)) |
| 559 | goto out; |
| 560 | |
| 561 | len = GFS2_EA_DATA_LEN(el.el_ea); |
| 562 | data = kmalloc(len, GFP_NOFS); |
| 563 | error = -ENOMEM; |
| 564 | if (data == NULL) |
| 565 | goto out; |
| 566 | |
| 567 | error = gfs2_ea_get_copy(ip, &el, data, len); |
Steven Whitehouse | 114b80c | 2011-11-09 12:54:43 +0000 | [diff] [blame] | 568 | if (error < 0) |
| 569 | kfree(data); |
| 570 | else |
| 571 | *ppdata = data; |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 572 | out: |
| 573 | brelse(el.el_bh); |
| 574 | return error; |
| 575 | } |
| 576 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 577 | /** |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 578 | * gfs2_xattr_get - Get a GFS2 extended attribute |
| 579 | * @inode: The inode |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 580 | * @name: The name of the extended attribute |
| 581 | * @buffer: The buffer to write the result into |
| 582 | * @size: The size of the buffer |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 583 | * @type: The type of extended attribute |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 584 | * |
| 585 | * Returns: actual size of data on success, -errno on error |
| 586 | */ |
Al Viro | 1a39ba9 | 2016-05-13 03:59:17 +0200 | [diff] [blame] | 587 | static int __gfs2_xattr_get(struct inode *inode, const char *name, |
| 588 | void *buffer, size_t size, int type) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 589 | { |
Al Viro | b296821 | 2016-04-10 20:48:24 -0400 | [diff] [blame] | 590 | struct gfs2_inode *ip = GFS2_I(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 591 | struct gfs2_ea_location el; |
| 592 | int error; |
| 593 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 594 | if (!ip->i_eattr) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 595 | return -ENODATA; |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 596 | if (strlen(name) > GFS2_EA_MAX_NAME_LEN) |
| 597 | return -EINVAL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 598 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 599 | error = gfs2_ea_find(ip, type, name, &el); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 600 | if (error) |
| 601 | return error; |
| 602 | if (!el.el_ea) |
| 603 | return -ENODATA; |
Steven Whitehouse | 86d0063 | 2009-09-14 09:50:57 +0100 | [diff] [blame] | 604 | if (size) |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 605 | error = gfs2_ea_get_copy(ip, &el, buffer, size); |
| 606 | else |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 607 | error = GFS2_EA_DATA_LEN(el.el_ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 608 | brelse(el.el_bh); |
| 609 | |
| 610 | return error; |
| 611 | } |
| 612 | |
Al Viro | 1a39ba9 | 2016-05-13 03:59:17 +0200 | [diff] [blame] | 613 | static int gfs2_xattr_get(const struct xattr_handler *handler, |
| 614 | struct dentry *unused, struct inode *inode, |
| 615 | const char *name, void *buffer, size_t size) |
| 616 | { |
| 617 | struct gfs2_inode *ip = GFS2_I(inode); |
| 618 | struct gfs2_holder gh; |
| 619 | bool need_unlock = false; |
| 620 | int ret; |
| 621 | |
| 622 | /* During lookup, SELinux calls this function with the glock locked. */ |
| 623 | |
| 624 | if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { |
| 625 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
| 626 | if (ret) |
| 627 | return ret; |
| 628 | need_unlock = true; |
| 629 | } |
| 630 | ret = __gfs2_xattr_get(inode, name, buffer, size, handler->flags); |
| 631 | if (need_unlock) |
| 632 | gfs2_glock_dq_uninit(&gh); |
| 633 | return ret; |
| 634 | } |
| 635 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 636 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 637 | * ea_alloc_blk - allocates a new block for extended attributes. |
| 638 | * @ip: A pointer to the inode that's getting extended attributes |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 639 | * @bhp: Pointer to pointer to a struct buffer_head |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 640 | * |
| 641 | * Returns: errno |
| 642 | */ |
| 643 | |
| 644 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) |
| 645 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 646 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 647 | struct gfs2_ea_header *ea; |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 648 | unsigned int n = 1; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 649 | u64 block; |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 650 | int error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 651 | |
Bob Peterson | 6e87ed0 | 2011-11-18 10:58:32 -0500 | [diff] [blame] | 652 | error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 653 | if (error) |
| 654 | return error; |
Steven Whitehouse | 5731be5 | 2008-02-01 13:16:55 +0000 | [diff] [blame] | 655 | gfs2_trans_add_unrevoke(sdp, block, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 656 | *bhp = gfs2_meta_new(ip->i_gl, block); |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 657 | gfs2_trans_add_meta(ip->i_gl, *bhp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 658 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
| 659 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); |
| 660 | |
| 661 | ea = GFS2_EA_BH2FIRST(*bhp); |
| 662 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); |
| 663 | ea->ea_type = GFS2_EATYPE_UNUSED; |
| 664 | ea->ea_flags = GFS2_EAFLAG_LAST; |
| 665 | ea->ea_num_ptrs = 0; |
| 666 | |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 667 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 668 | |
| 669 | return 0; |
| 670 | } |
| 671 | |
| 672 | /** |
| 673 | * ea_write - writes the request info to an ea, creating new blocks if |
| 674 | * necessary |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 675 | * @ip: inode that is being modified |
| 676 | * @ea: the location of the new ea in a block |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 677 | * @er: the write request |
| 678 | * |
| 679 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags |
| 680 | * |
| 681 | * returns : errno |
| 682 | */ |
| 683 | |
| 684 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, |
| 685 | struct gfs2_ea_request *er) |
| 686 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 687 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 688 | int error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 689 | |
| 690 | ea->ea_data_len = cpu_to_be32(er->er_data_len); |
| 691 | ea->ea_name_len = er->er_name_len; |
| 692 | ea->ea_type = er->er_type; |
| 693 | ea->__pad = 0; |
| 694 | |
| 695 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); |
| 696 | |
| 697 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { |
| 698 | ea->ea_num_ptrs = 0; |
| 699 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); |
| 700 | } else { |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 701 | __be64 *dataptr = GFS2_EA2DATAPTRS(ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 702 | const char *data = er->er_data; |
| 703 | unsigned int data_len = er->er_data_len; |
| 704 | unsigned int copy; |
| 705 | unsigned int x; |
| 706 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 707 | ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 708 | for (x = 0; x < ea->ea_num_ptrs; x++) { |
| 709 | struct buffer_head *bh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 710 | u64 block; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 711 | int mh_size = sizeof(struct gfs2_meta_header); |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 712 | unsigned int n = 1; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 713 | |
Bob Peterson | 6e87ed0 | 2011-11-18 10:58:32 -0500 | [diff] [blame] | 714 | error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 715 | if (error) |
| 716 | return error; |
Steven Whitehouse | 5731be5 | 2008-02-01 13:16:55 +0000 | [diff] [blame] | 717 | gfs2_trans_add_unrevoke(sdp, block, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 718 | bh = gfs2_meta_new(ip->i_gl, block); |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 719 | gfs2_trans_add_meta(ip->i_gl, bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 720 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
| 721 | |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 722 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 723 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 724 | copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize : |
| 725 | data_len; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 726 | memcpy(bh->b_data + mh_size, data, copy); |
| 727 | if (copy < sdp->sd_jbsize) |
| 728 | memset(bh->b_data + mh_size + copy, 0, |
| 729 | sdp->sd_jbsize - copy); |
| 730 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 731 | *dataptr++ = cpu_to_be64(bh->b_blocknr); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 732 | data += copy; |
| 733 | data_len -= copy; |
| 734 | |
| 735 | brelse(bh); |
| 736 | } |
| 737 | |
| 738 | gfs2_assert_withdraw(sdp, !data_len); |
| 739 | } |
| 740 | |
| 741 | return 0; |
| 742 | } |
| 743 | |
| 744 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 745 | struct gfs2_ea_request *er, void *private); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 746 | |
| 747 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 748 | unsigned int blks, |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 749 | ea_skeleton_call_t skeleton_call, void *private) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 750 | { |
Steven Whitehouse | 7b9cff4 | 2013-10-02 11:13:25 +0100 | [diff] [blame] | 751 | struct gfs2_alloc_parms ap = { .target = blks }; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 752 | struct buffer_head *dibh; |
| 753 | int error; |
| 754 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 755 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
| 756 | if (error) |
| 757 | return error; |
| 758 | |
Abhi Das | b8fbf47 | 2015-03-18 12:03:41 -0500 | [diff] [blame] | 759 | error = gfs2_quota_lock_check(ip, &ap); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 760 | if (error) |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 761 | return error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 762 | |
Steven Whitehouse | 7b9cff4 | 2013-10-02 11:13:25 +0100 | [diff] [blame] | 763 | error = gfs2_inplace_reserve(ip, &ap); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 764 | if (error) |
| 765 | goto out_gunlock_q; |
| 766 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 767 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), |
Steven Whitehouse | 71f890f | 2012-07-30 14:53:19 +0100 | [diff] [blame] | 768 | blks + gfs2_rg_blocks(ip, blks) + |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 769 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); |
| 770 | if (error) |
| 771 | goto out_ipres; |
| 772 | |
| 773 | error = skeleton_call(ip, er, private); |
| 774 | if (error) |
| 775 | goto out_end_trans; |
| 776 | |
| 777 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 778 | if (!error) { |
Deepa Dinamani | 078cd82 | 2016-09-14 07:48:04 -0700 | [diff] [blame] | 779 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 780 | gfs2_trans_add_meta(ip->i_gl, dibh); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 781 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 782 | brelse(dibh); |
| 783 | } |
| 784 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 785 | out_end_trans: |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 786 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 787 | out_ipres: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 788 | gfs2_inplace_release(ip); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 789 | out_gunlock_q: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 790 | gfs2_quota_unlock(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 791 | return error; |
| 792 | } |
| 793 | |
| 794 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 795 | void *private) |
| 796 | { |
| 797 | struct buffer_head *bh; |
| 798 | int error; |
| 799 | |
| 800 | error = ea_alloc_blk(ip, &bh); |
| 801 | if (error) |
| 802 | return error; |
| 803 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 804 | ip->i_eattr = bh->b_blocknr; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 805 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); |
| 806 | |
| 807 | brelse(bh); |
| 808 | |
| 809 | return error; |
| 810 | } |
| 811 | |
| 812 | /** |
| 813 | * ea_init - initializes a new eattr block |
| 814 | * @ip: |
| 815 | * @er: |
| 816 | * |
| 817 | * Returns: errno |
| 818 | */ |
| 819 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 820 | static int ea_init(struct gfs2_inode *ip, int type, const char *name, |
| 821 | const void *data, size_t size) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 822 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 823 | struct gfs2_ea_request er; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 824 | unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 825 | unsigned int blks = 1; |
| 826 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 827 | er.er_type = type; |
| 828 | er.er_name = name; |
| 829 | er.er_name_len = strlen(name); |
| 830 | er.er_data = (void *)data; |
| 831 | er.er_data_len = size; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 832 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 833 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize) |
| 834 | blks += DIV_ROUND_UP(er.er_data_len, jbsize); |
| 835 | |
| 836 | return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 837 | } |
| 838 | |
| 839 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) |
| 840 | { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 841 | u32 ea_size = GFS2_EA_SIZE(ea); |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 842 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
| 843 | ea_size); |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 844 | u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 845 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; |
| 846 | |
| 847 | ea->ea_rec_len = cpu_to_be32(ea_size); |
| 848 | ea->ea_flags ^= last; |
| 849 | |
| 850 | new->ea_rec_len = cpu_to_be32(new_size); |
| 851 | new->ea_flags = last; |
| 852 | |
| 853 | return new; |
| 854 | } |
| 855 | |
| 856 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, |
| 857 | struct gfs2_ea_location *el) |
| 858 | { |
| 859 | struct gfs2_ea_header *ea = el->el_ea; |
| 860 | struct gfs2_ea_header *prev = el->el_prev; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 861 | u32 len; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 862 | |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 863 | gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 864 | |
| 865 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { |
| 866 | ea->ea_type = GFS2_EATYPE_UNUSED; |
| 867 | return; |
| 868 | } else if (GFS2_EA2NEXT(prev) != ea) { |
| 869 | prev = GFS2_EA2NEXT(prev); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 870 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 871 | } |
| 872 | |
| 873 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| 874 | prev->ea_rec_len = cpu_to_be32(len); |
| 875 | |
| 876 | if (GFS2_EA_IS_LAST(ea)) |
| 877 | prev->ea_flags |= GFS2_EAFLAG_LAST; |
| 878 | } |
| 879 | |
| 880 | struct ea_set { |
| 881 | int ea_split; |
| 882 | |
| 883 | struct gfs2_ea_request *es_er; |
| 884 | struct gfs2_ea_location *es_el; |
| 885 | |
| 886 | struct buffer_head *es_bh; |
| 887 | struct gfs2_ea_header *es_ea; |
| 888 | }; |
| 889 | |
| 890 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, |
| 891 | struct gfs2_ea_header *ea, struct ea_set *es) |
| 892 | { |
| 893 | struct gfs2_ea_request *er = es->es_er; |
| 894 | struct buffer_head *dibh; |
| 895 | int error; |
| 896 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 897 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 898 | if (error) |
| 899 | return error; |
| 900 | |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 901 | gfs2_trans_add_meta(ip->i_gl, bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 902 | |
| 903 | if (es->ea_split) |
| 904 | ea = ea_split_ea(ea); |
| 905 | |
| 906 | ea_write(ip, ea, er); |
| 907 | |
| 908 | if (es->es_el) |
| 909 | ea_set_remove_stuffed(ip, es->es_el); |
| 910 | |
| 911 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 912 | if (error) |
| 913 | goto out; |
Deepa Dinamani | 078cd82 | 2016-09-14 07:48:04 -0700 | [diff] [blame] | 914 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 915 | gfs2_trans_add_meta(ip->i_gl, dibh); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 916 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 917 | brelse(dibh); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 918 | out: |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 919 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 920 | return error; |
| 921 | } |
| 922 | |
| 923 | static int ea_set_simple_alloc(struct gfs2_inode *ip, |
| 924 | struct gfs2_ea_request *er, void *private) |
| 925 | { |
| 926 | struct ea_set *es = private; |
| 927 | struct gfs2_ea_header *ea = es->es_ea; |
| 928 | int error; |
| 929 | |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 930 | gfs2_trans_add_meta(ip->i_gl, es->es_bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 931 | |
| 932 | if (es->ea_split) |
| 933 | ea = ea_split_ea(ea); |
| 934 | |
| 935 | error = ea_write(ip, ea, er); |
| 936 | if (error) |
| 937 | return error; |
| 938 | |
| 939 | if (es->es_el) |
| 940 | ea_set_remove_stuffed(ip, es->es_el); |
| 941 | |
| 942 | return 0; |
| 943 | } |
| 944 | |
| 945 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, |
| 946 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| 947 | void *private) |
| 948 | { |
| 949 | struct ea_set *es = private; |
| 950 | unsigned int size; |
| 951 | int stuffed; |
| 952 | int error; |
| 953 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 954 | stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len, |
| 955 | es->es_er->er_data_len, &size); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 956 | |
| 957 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { |
| 958 | if (GFS2_EA_REC_LEN(ea) < size) |
| 959 | return 0; |
| 960 | if (!GFS2_EA_IS_STUFFED(ea)) { |
| 961 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); |
| 962 | if (error) |
| 963 | return error; |
| 964 | } |
| 965 | es->ea_split = 0; |
| 966 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) |
| 967 | es->ea_split = 1; |
| 968 | else |
| 969 | return 0; |
| 970 | |
| 971 | if (stuffed) { |
| 972 | error = ea_set_simple_noalloc(ip, bh, ea, es); |
| 973 | if (error) |
| 974 | return error; |
| 975 | } else { |
| 976 | unsigned int blks; |
| 977 | |
| 978 | es->es_bh = bh; |
| 979 | es->es_ea = ea; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 980 | blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 981 | GFS2_SB(&ip->i_inode)->sd_jbsize); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 982 | |
| 983 | error = ea_alloc_skeleton(ip, es->es_er, blks, |
| 984 | ea_set_simple_alloc, es); |
| 985 | if (error) |
| 986 | return error; |
| 987 | } |
| 988 | |
| 989 | return 1; |
| 990 | } |
| 991 | |
| 992 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 993 | void *private) |
| 994 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 995 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 996 | struct buffer_head *indbh, *newbh; |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 997 | __be64 *eablk; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 998 | int error; |
| 999 | int mh_size = sizeof(struct gfs2_meta_header); |
| 1000 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 1001 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1002 | __be64 *end; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1003 | |
Andreas Gruenbacher | c8d5770 | 2015-11-11 15:00:35 -0600 | [diff] [blame] | 1004 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 1005 | &indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1006 | if (error) |
| 1007 | return error; |
| 1008 | |
| 1009 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { |
| 1010 | error = -EIO; |
| 1011 | goto out; |
| 1012 | } |
| 1013 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1014 | eablk = (__be64 *)(indbh->b_data + mh_size); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1015 | end = eablk + sdp->sd_inptrs; |
| 1016 | |
| 1017 | for (; eablk < end; eablk++) |
| 1018 | if (!*eablk) |
| 1019 | break; |
| 1020 | |
| 1021 | if (eablk == end) { |
| 1022 | error = -ENOSPC; |
| 1023 | goto out; |
| 1024 | } |
| 1025 | |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 1026 | gfs2_trans_add_meta(ip->i_gl, indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1027 | } else { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1028 | u64 blk; |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 1029 | unsigned int n = 1; |
Bob Peterson | 6e87ed0 | 2011-11-18 10:58:32 -0500 | [diff] [blame] | 1030 | error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL); |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 1031 | if (error) |
| 1032 | return error; |
Steven Whitehouse | 5731be5 | 2008-02-01 13:16:55 +0000 | [diff] [blame] | 1033 | gfs2_trans_add_unrevoke(sdp, blk, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1034 | indbh = gfs2_meta_new(ip->i_gl, blk); |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 1035 | gfs2_trans_add_meta(ip->i_gl, indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1036 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
| 1037 | gfs2_buffer_clear_tail(indbh, mh_size); |
| 1038 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1039 | eablk = (__be64 *)(indbh->b_data + mh_size); |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 1040 | *eablk = cpu_to_be64(ip->i_eattr); |
| 1041 | ip->i_eattr = blk; |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 1042 | ip->i_diskflags |= GFS2_DIF_EA_INDIRECT; |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 1043 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1044 | |
| 1045 | eablk++; |
| 1046 | } |
| 1047 | |
| 1048 | error = ea_alloc_blk(ip, &newbh); |
| 1049 | if (error) |
| 1050 | goto out; |
| 1051 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1052 | *eablk = cpu_to_be64((u64)newbh->b_blocknr); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1053 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); |
| 1054 | brelse(newbh); |
| 1055 | if (error) |
| 1056 | goto out; |
| 1057 | |
| 1058 | if (private) |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 1059 | ea_set_remove_stuffed(ip, private); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1060 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1061 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1062 | brelse(indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1063 | return error; |
| 1064 | } |
| 1065 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1066 | static int ea_set_i(struct gfs2_inode *ip, int type, const char *name, |
| 1067 | const void *value, size_t size, struct gfs2_ea_location *el) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1068 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1069 | struct gfs2_ea_request er; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1070 | struct ea_set es; |
| 1071 | unsigned int blks = 2; |
| 1072 | int error; |
| 1073 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1074 | er.er_type = type; |
| 1075 | er.er_name = name; |
| 1076 | er.er_data = (void *)value; |
| 1077 | er.er_name_len = strlen(name); |
| 1078 | er.er_data_len = size; |
| 1079 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1080 | memset(&es, 0, sizeof(struct ea_set)); |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1081 | es.es_er = &er; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1082 | es.es_el = el; |
| 1083 | |
| 1084 | error = ea_foreach(ip, ea_set_simple, &es); |
| 1085 | if (error > 0) |
| 1086 | return 0; |
| 1087 | if (error) |
| 1088 | return error; |
| 1089 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 1090 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1091 | blks++; |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1092 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize) |
| 1093 | blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1094 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1095 | return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1096 | } |
| 1097 | |
| 1098 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, |
| 1099 | struct gfs2_ea_location *el) |
| 1100 | { |
| 1101 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { |
| 1102 | el->el_prev = GFS2_EA2NEXT(el->el_prev); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1103 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1104 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); |
| 1105 | } |
| 1106 | |
Steven Whitehouse | 86d0063 | 2009-09-14 09:50:57 +0100 | [diff] [blame] | 1107 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1108 | } |
| 1109 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1110 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) |
| 1111 | { |
| 1112 | struct gfs2_ea_header *ea = el->el_ea; |
| 1113 | struct gfs2_ea_header *prev = el->el_prev; |
| 1114 | struct buffer_head *dibh; |
| 1115 | int error; |
| 1116 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1117 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1118 | if (error) |
| 1119 | return error; |
| 1120 | |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 1121 | gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1122 | |
| 1123 | if (prev) { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1124 | u32 len; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1125 | |
| 1126 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| 1127 | prev->ea_rec_len = cpu_to_be32(len); |
| 1128 | |
| 1129 | if (GFS2_EA_IS_LAST(ea)) |
| 1130 | prev->ea_flags |= GFS2_EAFLAG_LAST; |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1131 | } else { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1132 | ea->ea_type = GFS2_EATYPE_UNUSED; |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1133 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1134 | |
| 1135 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1136 | if (!error) { |
Deepa Dinamani | 078cd82 | 2016-09-14 07:48:04 -0700 | [diff] [blame] | 1137 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 1138 | gfs2_trans_add_meta(ip->i_gl, dibh); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 1139 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1140 | brelse(dibh); |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 1141 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1142 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1143 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1144 | |
| 1145 | return error; |
| 1146 | } |
| 1147 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1148 | /** |
| 1149 | * gfs2_xattr_remove - Remove a GFS2 extended attribute |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1150 | * @ip: The inode |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1151 | * @type: The type of the extended attribute |
| 1152 | * @name: The name of the extended attribute |
| 1153 | * |
| 1154 | * This is not called directly by the VFS since we use the (common) |
| 1155 | * scheme of making a "set with NULL data" mean a remove request. Note |
| 1156 | * that this is different from a set with zero length data. |
| 1157 | * |
| 1158 | * Returns: 0, or errno on failure |
| 1159 | */ |
| 1160 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1161 | static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1162 | { |
| 1163 | struct gfs2_ea_location el; |
| 1164 | int error; |
| 1165 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 1166 | if (!ip->i_eattr) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1167 | return -ENODATA; |
| 1168 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1169 | error = gfs2_ea_find(ip, type, name, &el); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1170 | if (error) |
| 1171 | return error; |
| 1172 | if (!el.el_ea) |
| 1173 | return -ENODATA; |
| 1174 | |
| 1175 | if (GFS2_EA_IS_STUFFED(el.el_ea)) |
| 1176 | error = ea_remove_stuffed(ip, &el); |
| 1177 | else |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1178 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1179 | |
| 1180 | brelse(el.el_bh); |
| 1181 | |
| 1182 | return error; |
| 1183 | } |
| 1184 | |
| 1185 | /** |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1186 | * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute |
| 1187 | * @ip: The inode |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1188 | * @name: The name of the extended attribute |
| 1189 | * @value: The value of the extended attribute (NULL for remove) |
| 1190 | * @size: The size of the @value argument |
| 1191 | * @flags: Create or Replace |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1192 | * @type: The type of the extended attribute |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1193 | * |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1194 | * See gfs2_xattr_remove() for details of the removal of xattrs. |
| 1195 | * |
| 1196 | * Returns: 0 or errno on failure |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1197 | */ |
| 1198 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1199 | int __gfs2_xattr_set(struct inode *inode, const char *name, |
| 1200 | const void *value, size_t size, int flags, int type) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1201 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1202 | struct gfs2_inode *ip = GFS2_I(inode); |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1203 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1204 | struct gfs2_ea_location el; |
| 1205 | unsigned int namel = strlen(name); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1206 | int error; |
| 1207 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1208 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 1209 | return -EPERM; |
| 1210 | if (namel > GFS2_EA_MAX_NAME_LEN) |
| 1211 | return -ERANGE; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1212 | |
Ernesto A. Fernández | 54aae14 | 2017-08-30 07:26:30 -0500 | [diff] [blame] | 1213 | if (value == NULL) { |
| 1214 | error = gfs2_xattr_remove(ip, type, name); |
| 1215 | if (error == -ENODATA && !(flags & XATTR_REPLACE)) |
| 1216 | error = 0; |
| 1217 | return error; |
| 1218 | } |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1219 | |
| 1220 | if (ea_check_size(sdp, namel, size)) |
| 1221 | return -ERANGE; |
| 1222 | |
| 1223 | if (!ip->i_eattr) { |
| 1224 | if (flags & XATTR_REPLACE) |
| 1225 | return -ENODATA; |
| 1226 | return ea_init(ip, type, name, value, size); |
| 1227 | } |
| 1228 | |
| 1229 | error = gfs2_ea_find(ip, type, name, &el); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1230 | if (error) |
| 1231 | return error; |
| 1232 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1233 | if (el.el_ea) { |
| 1234 | if (ip->i_diskflags & GFS2_DIF_APPENDONLY) { |
| 1235 | brelse(el.el_bh); |
| 1236 | return -EPERM; |
| 1237 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1238 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1239 | error = -EEXIST; |
| 1240 | if (!(flags & XATTR_CREATE)) { |
| 1241 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); |
| 1242 | error = ea_set_i(ip, type, name, value, size, &el); |
| 1243 | if (!error && unstuffed) |
| 1244 | ea_set_remove_unstuffed(ip, &el); |
| 1245 | } |
| 1246 | |
| 1247 | brelse(el.el_bh); |
| 1248 | return error; |
| 1249 | } |
| 1250 | |
| 1251 | error = -ENODATA; |
| 1252 | if (!(flags & XATTR_REPLACE)) |
| 1253 | error = ea_set_i(ip, type, name, value, size, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1254 | |
| 1255 | return error; |
| 1256 | } |
| 1257 | |
Andreas Gruenbacher | d9a82a0 | 2015-10-04 19:18:51 +0200 | [diff] [blame] | 1258 | static int gfs2_xattr_set(const struct xattr_handler *handler, |
Al Viro | 5930122 | 2016-05-27 10:19:30 -0400 | [diff] [blame] | 1259 | struct dentry *unused, struct inode *inode, |
| 1260 | const char *name, const void *value, |
| 1261 | size_t size, int flags) |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1262 | { |
Al Viro | 1a39ba9 | 2016-05-13 03:59:17 +0200 | [diff] [blame] | 1263 | struct gfs2_inode *ip = GFS2_I(inode); |
| 1264 | struct gfs2_holder gh; |
| 1265 | int ret; |
| 1266 | |
| 1267 | ret = gfs2_rsqa_alloc(ip); |
| 1268 | if (ret) |
| 1269 | return ret; |
| 1270 | |
| 1271 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 1272 | if (ret) |
| 1273 | return ret; |
| 1274 | ret = __gfs2_xattr_set(inode, name, value, size, flags, handler->flags); |
| 1275 | gfs2_glock_dq_uninit(&gh); |
| 1276 | return ret; |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1277 | } |
| 1278 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1279 | static int ea_dealloc_indirect(struct gfs2_inode *ip) |
| 1280 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1281 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1282 | struct gfs2_rgrp_list rlist; |
| 1283 | struct buffer_head *indbh, *dibh; |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1284 | __be64 *eablk, *end; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1285 | unsigned int rg_blocks = 0; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1286 | u64 bstart = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1287 | unsigned int blen = 0; |
| 1288 | unsigned int blks = 0; |
| 1289 | unsigned int x; |
| 1290 | int error; |
| 1291 | |
Bob Peterson | 5e2f7d6 | 2012-04-04 22:11:16 -0400 | [diff] [blame] | 1292 | error = gfs2_rindex_update(sdp); |
| 1293 | if (error) |
| 1294 | return error; |
| 1295 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1296 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); |
| 1297 | |
Andreas Gruenbacher | c8d5770 | 2015-11-11 15:00:35 -0600 | [diff] [blame] | 1298 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1299 | if (error) |
| 1300 | return error; |
| 1301 | |
| 1302 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { |
| 1303 | error = -EIO; |
| 1304 | goto out; |
| 1305 | } |
| 1306 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1307 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1308 | end = eablk + sdp->sd_inptrs; |
| 1309 | |
| 1310 | for (; eablk < end; eablk++) { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1311 | u64 bn; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1312 | |
| 1313 | if (!*eablk) |
| 1314 | break; |
| 1315 | bn = be64_to_cpu(*eablk); |
| 1316 | |
| 1317 | if (bstart + blen == bn) |
| 1318 | blen++; |
| 1319 | else { |
| 1320 | if (bstart) |
Steven Whitehouse | 70b0c36 | 2011-09-02 16:08:09 +0100 | [diff] [blame] | 1321 | gfs2_rlist_add(ip, &rlist, bstart); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1322 | bstart = bn; |
| 1323 | blen = 1; |
| 1324 | } |
| 1325 | blks++; |
| 1326 | } |
| 1327 | if (bstart) |
Steven Whitehouse | 70b0c36 | 2011-09-02 16:08:09 +0100 | [diff] [blame] | 1328 | gfs2_rlist_add(ip, &rlist, bstart); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1329 | else |
| 1330 | goto out; |
| 1331 | |
Bob Peterson | fe6c991 | 2008-01-28 11:13:02 -0600 | [diff] [blame] | 1332 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1333 | |
| 1334 | for (x = 0; x < rlist.rl_rgrps; x++) { |
Andreas Gruenbacher | 6f6597ba | 2017-06-30 07:55:08 -0500 | [diff] [blame] | 1335 | struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(rlist.rl_ghs[x].gh_gl); |
| 1336 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 1337 | rg_blocks += rgd->rd_length; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1338 | } |
| 1339 | |
| 1340 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); |
| 1341 | if (error) |
| 1342 | goto out_rlist_free; |
| 1343 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 1344 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT + |
| 1345 | RES_STATFS + RES_QUOTA, blks); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1346 | if (error) |
| 1347 | goto out_gunlock; |
| 1348 | |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 1349 | gfs2_trans_add_meta(ip->i_gl, indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1350 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1351 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1352 | bstart = 0; |
| 1353 | blen = 0; |
| 1354 | |
| 1355 | for (; eablk < end; eablk++) { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1356 | u64 bn; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1357 | |
| 1358 | if (!*eablk) |
| 1359 | break; |
| 1360 | bn = be64_to_cpu(*eablk); |
| 1361 | |
| 1362 | if (bstart + blen == bn) |
| 1363 | blen++; |
| 1364 | else { |
| 1365 | if (bstart) |
| 1366 | gfs2_free_meta(ip, bstart, blen); |
| 1367 | bstart = bn; |
| 1368 | blen = 1; |
| 1369 | } |
| 1370 | |
| 1371 | *eablk = 0; |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 1372 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1373 | } |
| 1374 | if (bstart) |
| 1375 | gfs2_free_meta(ip, bstart, blen); |
| 1376 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 1377 | ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1378 | |
| 1379 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1380 | if (!error) { |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 1381 | gfs2_trans_add_meta(ip->i_gl, dibh); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 1382 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1383 | brelse(dibh); |
| 1384 | } |
| 1385 | |
| 1386 | gfs2_trans_end(sdp); |
| 1387 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1388 | out_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1389 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1390 | out_rlist_free: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1391 | gfs2_rlist_free(&rlist); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1392 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1393 | brelse(indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1394 | return error; |
| 1395 | } |
| 1396 | |
| 1397 | static int ea_dealloc_block(struct gfs2_inode *ip) |
| 1398 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1399 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1400 | struct gfs2_rgrpd *rgd; |
| 1401 | struct buffer_head *dibh; |
Bob Peterson | 564e12b | 2011-11-21 13:36:17 -0500 | [diff] [blame] | 1402 | struct gfs2_holder gh; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1403 | int error; |
| 1404 | |
Bob Peterson | 5e2f7d6 | 2012-04-04 22:11:16 -0400 | [diff] [blame] | 1405 | error = gfs2_rindex_update(sdp); |
| 1406 | if (error) |
| 1407 | return error; |
| 1408 | |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1409 | rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1410 | if (!rgd) { |
| 1411 | gfs2_consist_inode(ip); |
| 1412 | return -EIO; |
| 1413 | } |
| 1414 | |
Bob Peterson | 564e12b | 2011-11-21 13:36:17 -0500 | [diff] [blame] | 1415 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1416 | if (error) |
| 1417 | return error; |
| 1418 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 1419 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS + |
| 1420 | RES_QUOTA, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1421 | if (error) |
| 1422 | goto out_gunlock; |
| 1423 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 1424 | gfs2_free_meta(ip, ip->i_eattr, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1425 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 1426 | ip->i_eattr = 0; |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 1427 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1428 | |
| 1429 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1430 | if (!error) { |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 1431 | gfs2_trans_add_meta(ip->i_gl, dibh); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 1432 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1433 | brelse(dibh); |
| 1434 | } |
| 1435 | |
| 1436 | gfs2_trans_end(sdp); |
| 1437 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1438 | out_gunlock: |
Bob Peterson | 564e12b | 2011-11-21 13:36:17 -0500 | [diff] [blame] | 1439 | gfs2_glock_dq_uninit(&gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1440 | return error; |
| 1441 | } |
| 1442 | |
| 1443 | /** |
| 1444 | * gfs2_ea_dealloc - deallocate the extended attribute fork |
| 1445 | * @ip: the inode |
| 1446 | * |
| 1447 | * Returns: errno |
| 1448 | */ |
| 1449 | |
| 1450 | int gfs2_ea_dealloc(struct gfs2_inode *ip) |
| 1451 | { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1452 | int error; |
| 1453 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1454 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
| 1455 | if (error) |
| 1456 | return error; |
| 1457 | |
Eric W. Biederman | f4108a6 | 2013-01-31 17:49:26 -0800 | [diff] [blame] | 1458 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1459 | if (error) |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 1460 | return error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1461 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1462 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); |
| 1463 | if (error) |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 1464 | goto out_quota; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1465 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 1466 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1467 | error = ea_dealloc_indirect(ip); |
| 1468 | if (error) |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 1469 | goto out_quota; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1470 | } |
| 1471 | |
| 1472 | error = ea_dealloc_block(ip); |
| 1473 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1474 | out_quota: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1475 | gfs2_quota_unhold(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1476 | return error; |
| 1477 | } |
| 1478 | |
Stephen Hemminger | b7bb0a1 | 2010-05-13 17:53:23 -0700 | [diff] [blame] | 1479 | static const struct xattr_handler gfs2_xattr_user_handler = { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1480 | .prefix = XATTR_USER_PREFIX, |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1481 | .flags = GFS2_EATYPE_USR, |
| 1482 | .get = gfs2_xattr_get, |
| 1483 | .set = gfs2_xattr_set, |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1484 | }; |
| 1485 | |
Stephen Hemminger | b7bb0a1 | 2010-05-13 17:53:23 -0700 | [diff] [blame] | 1486 | static const struct xattr_handler gfs2_xattr_security_handler = { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1487 | .prefix = XATTR_SECURITY_PREFIX, |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1488 | .flags = GFS2_EATYPE_SECURITY, |
| 1489 | .get = gfs2_xattr_get, |
| 1490 | .set = gfs2_xattr_set, |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1491 | }; |
| 1492 | |
Stephen Hemminger | b7bb0a1 | 2010-05-13 17:53:23 -0700 | [diff] [blame] | 1493 | const struct xattr_handler *gfs2_xattr_handlers[] = { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1494 | &gfs2_xattr_user_handler, |
| 1495 | &gfs2_xattr_security_handler, |
Christoph Hellwig | e01580b | 2013-12-20 05:16:52 -0800 | [diff] [blame] | 1496 | &posix_acl_access_xattr_handler, |
| 1497 | &posix_acl_default_xattr_handler, |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1498 | NULL, |
| 1499 | }; |
| 1500 | |