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 |
| 7 | * of the GNU General Public License v.2. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/spinlock.h> |
| 13 | #include <linux/completion.h> |
| 14 | #include <linux/buffer_head.h> |
| 15 | #include <linux/xattr.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 16 | #include <linux/gfs2_ondisk.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 17 | #include <asm/uaccess.h> |
| 18 | |
| 19 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 20 | #include "lm_interface.h" |
| 21 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 22 | #include "acl.h" |
| 23 | #include "eaops.h" |
| 24 | #include "eattr.h" |
| 25 | #include "glock.h" |
| 26 | #include "inode.h" |
| 27 | #include "meta_io.h" |
| 28 | #include "quota.h" |
| 29 | #include "rgrp.h" |
| 30 | #include "trans.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 31 | #include "util.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 32 | |
| 33 | /** |
| 34 | * ea_calc_size - returns the acutal number of bytes the request will take up |
| 35 | * (not counting any unstuffed data blocks) |
| 36 | * @sdp: |
| 37 | * @er: |
| 38 | * @size: |
| 39 | * |
| 40 | * Returns: 1 if the EA should be stuffed |
| 41 | */ |
| 42 | |
| 43 | static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er, |
| 44 | unsigned int *size) |
| 45 | { |
| 46 | *size = GFS2_EAREQ_SIZE_STUFFED(er); |
| 47 | if (*size <= sdp->sd_jbsize) |
| 48 | return 1; |
| 49 | |
| 50 | *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er); |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er) |
| 56 | { |
| 57 | unsigned int size; |
| 58 | |
| 59 | if (er->er_data_len > GFS2_EA_MAX_DATA_LEN) |
| 60 | return -ERANGE; |
| 61 | |
| 62 | ea_calc_size(sdp, er, &size); |
| 63 | |
| 64 | /* This can only happen with 512 byte blocks */ |
| 65 | if (size > sdp->sd_jbsize) |
| 66 | return -ERANGE; |
| 67 | |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | typedef int (*ea_call_t) (struct gfs2_inode *ip, |
| 72 | struct buffer_head *bh, |
| 73 | struct gfs2_ea_header *ea, |
| 74 | struct gfs2_ea_header *prev, |
| 75 | void *private); |
| 76 | |
| 77 | static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| 78 | ea_call_t ea_call, void *data) |
| 79 | { |
| 80 | struct gfs2_ea_header *ea, *prev = NULL; |
| 81 | int error = 0; |
| 82 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 83 | 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] | 84 | return -EIO; |
| 85 | |
| 86 | for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) { |
| 87 | if (!GFS2_EA_REC_LEN(ea)) |
| 88 | goto fail; |
| 89 | if (!(bh->b_data <= (char *)ea && |
| 90 | (char *)GFS2_EA2NEXT(ea) <= |
| 91 | bh->b_data + bh->b_size)) |
| 92 | goto fail; |
| 93 | if (!GFS2_EATYPE_VALID(ea->ea_type)) |
| 94 | goto fail; |
| 95 | |
| 96 | error = ea_call(ip, bh, ea, prev, data); |
| 97 | if (error) |
| 98 | return error; |
| 99 | |
| 100 | if (GFS2_EA_IS_LAST(ea)) { |
| 101 | if ((char *)GFS2_EA2NEXT(ea) != |
| 102 | bh->b_data + bh->b_size) |
| 103 | goto fail; |
| 104 | break; |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | return error; |
| 109 | |
| 110 | fail: |
| 111 | gfs2_consist_inode(ip); |
| 112 | return -EIO; |
| 113 | } |
| 114 | |
| 115 | static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) |
| 116 | { |
| 117 | struct buffer_head *bh, *eabh; |
| 118 | uint64_t *eablk, *end; |
| 119 | int error; |
| 120 | |
| 121 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, |
| 122 | DIO_START | DIO_WAIT, &bh); |
| 123 | if (error) |
| 124 | return error; |
| 125 | |
| 126 | if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) { |
| 127 | error = ea_foreach_i(ip, bh, ea_call, data); |
| 128 | goto out; |
| 129 | } |
| 130 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 131 | 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] | 132 | error = -EIO; |
| 133 | goto out; |
| 134 | } |
| 135 | |
| 136 | eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 137 | end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 138 | |
| 139 | for (; eablk < end; eablk++) { |
| 140 | uint64_t bn; |
| 141 | |
| 142 | if (!*eablk) |
| 143 | break; |
| 144 | bn = be64_to_cpu(*eablk); |
| 145 | |
| 146 | error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT, |
| 147 | &eabh); |
| 148 | if (error) |
| 149 | break; |
| 150 | error = ea_foreach_i(ip, eabh, ea_call, data); |
| 151 | brelse(eabh); |
| 152 | if (error) |
| 153 | break; |
| 154 | } |
| 155 | out: |
| 156 | brelse(bh); |
| 157 | |
| 158 | return error; |
| 159 | } |
| 160 | |
| 161 | struct ea_find { |
| 162 | struct gfs2_ea_request *ef_er; |
| 163 | struct gfs2_ea_location *ef_el; |
| 164 | }; |
| 165 | |
| 166 | static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| 167 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| 168 | void *private) |
| 169 | { |
| 170 | struct ea_find *ef = private; |
| 171 | struct gfs2_ea_request *er = ef->ef_er; |
| 172 | |
| 173 | if (ea->ea_type == GFS2_EATYPE_UNUSED) |
| 174 | return 0; |
| 175 | |
| 176 | if (ea->ea_type == er->er_type) { |
| 177 | if (ea->ea_name_len == er->er_name_len && |
| 178 | !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) { |
| 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 | |
| 188 | #if 0 |
| 189 | else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) && |
| 190 | er->er_type == GFS2_EATYPE_SYS) |
| 191 | return 1; |
| 192 | #endif |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 198 | struct gfs2_ea_location *el) |
| 199 | { |
| 200 | struct ea_find ef; |
| 201 | int error; |
| 202 | |
| 203 | ef.ef_er = er; |
| 204 | ef.ef_el = el; |
| 205 | |
| 206 | memset(el, 0, sizeof(struct gfs2_ea_location)); |
| 207 | |
| 208 | error = ea_foreach(ip, ea_find_i, &ef); |
| 209 | if (error > 0) |
| 210 | return 0; |
| 211 | |
| 212 | return error; |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * ea_dealloc_unstuffed - |
| 217 | * @ip: |
| 218 | * @bh: |
| 219 | * @ea: |
| 220 | * @prev: |
| 221 | * @private: |
| 222 | * |
| 223 | * Take advantage of the fact that all unstuffed blocks are |
| 224 | * allocated from the same RG. But watch, this may not always |
| 225 | * be true. |
| 226 | * |
| 227 | * Returns: errno |
| 228 | */ |
| 229 | |
| 230 | static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, |
| 231 | struct gfs2_ea_header *ea, |
| 232 | struct gfs2_ea_header *prev, void *private) |
| 233 | { |
| 234 | int *leave = private; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 235 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 236 | struct gfs2_rgrpd *rgd; |
| 237 | struct gfs2_holder rg_gh; |
| 238 | struct buffer_head *dibh; |
| 239 | uint64_t *dataptrs, bn = 0; |
| 240 | uint64_t bstart = 0; |
| 241 | unsigned int blen = 0; |
| 242 | unsigned int blks = 0; |
| 243 | unsigned int x; |
| 244 | int error; |
| 245 | |
| 246 | if (GFS2_EA_IS_STUFFED(ea)) |
| 247 | return 0; |
| 248 | |
| 249 | dataptrs = GFS2_EA2DATAPTRS(ea); |
| 250 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) |
| 251 | if (*dataptrs) { |
| 252 | blks++; |
| 253 | bn = be64_to_cpu(*dataptrs); |
| 254 | } |
| 255 | if (!blks) |
| 256 | return 0; |
| 257 | |
| 258 | rgd = gfs2_blk2rgrpd(sdp, bn); |
| 259 | if (!rgd) { |
| 260 | gfs2_consist_inode(ip); |
| 261 | return -EIO; |
| 262 | } |
| 263 | |
| 264 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); |
| 265 | if (error) |
| 266 | return error; |
| 267 | |
| 268 | error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length + |
| 269 | RES_DINODE + RES_EATTR + RES_STATFS + |
| 270 | RES_QUOTA, blks); |
| 271 | if (error) |
| 272 | goto out_gunlock; |
| 273 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 274 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 275 | |
| 276 | dataptrs = GFS2_EA2DATAPTRS(ea); |
| 277 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { |
| 278 | if (!*dataptrs) |
| 279 | break; |
| 280 | bn = be64_to_cpu(*dataptrs); |
| 281 | |
| 282 | if (bstart + blen == bn) |
| 283 | blen++; |
| 284 | else { |
| 285 | if (bstart) |
| 286 | gfs2_free_meta(ip, bstart, blen); |
| 287 | bstart = bn; |
| 288 | blen = 1; |
| 289 | } |
| 290 | |
| 291 | *dataptrs = 0; |
| 292 | if (!ip->i_di.di_blocks) |
| 293 | gfs2_consist_inode(ip); |
| 294 | ip->i_di.di_blocks--; |
| 295 | } |
| 296 | if (bstart) |
| 297 | gfs2_free_meta(ip, bstart, blen); |
| 298 | |
| 299 | if (prev && !leave) { |
| 300 | uint32_t len; |
| 301 | |
| 302 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| 303 | prev->ea_rec_len = cpu_to_be32(len); |
| 304 | |
| 305 | if (GFS2_EA_IS_LAST(ea)) |
| 306 | prev->ea_flags |= GFS2_EAFLAG_LAST; |
| 307 | } else { |
| 308 | ea->ea_type = GFS2_EATYPE_UNUSED; |
| 309 | ea->ea_num_ptrs = 0; |
| 310 | } |
| 311 | |
| 312 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 313 | if (!error) { |
| 314 | ip->i_di.di_ctime = get_seconds(); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 315 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 316 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 317 | brelse(dibh); |
| 318 | } |
| 319 | |
| 320 | gfs2_trans_end(sdp); |
| 321 | |
| 322 | out_gunlock: |
| 323 | gfs2_glock_dq_uninit(&rg_gh); |
| 324 | |
| 325 | return error; |
| 326 | } |
| 327 | |
| 328 | static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, |
| 329 | struct gfs2_ea_header *ea, |
| 330 | struct gfs2_ea_header *prev, int leave) |
| 331 | { |
| 332 | struct gfs2_alloc *al; |
| 333 | int error; |
| 334 | |
| 335 | al = gfs2_alloc_get(ip); |
| 336 | |
| 337 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 338 | if (error) |
| 339 | goto out_alloc; |
| 340 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 341 | error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 342 | if (error) |
| 343 | goto out_quota; |
| 344 | |
| 345 | error = ea_dealloc_unstuffed(ip, |
| 346 | bh, ea, prev, |
| 347 | (leave) ? &error : NULL); |
| 348 | |
| 349 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
| 350 | |
| 351 | out_quota: |
| 352 | gfs2_quota_unhold(ip); |
| 353 | |
| 354 | out_alloc: |
| 355 | gfs2_alloc_put(ip); |
| 356 | |
| 357 | return error; |
| 358 | } |
| 359 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 360 | struct ea_list { |
| 361 | struct gfs2_ea_request *ei_er; |
| 362 | unsigned int ei_size; |
| 363 | }; |
| 364 | |
| 365 | static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| 366 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| 367 | void *private) |
| 368 | { |
| 369 | struct ea_list *ei = private; |
| 370 | struct gfs2_ea_request *er = ei->ei_er; |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 371 | unsigned int ea_size = gfs2_ea_strlen(ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 372 | |
| 373 | if (ea->ea_type == GFS2_EATYPE_UNUSED) |
| 374 | return 0; |
| 375 | |
| 376 | if (er->er_data_len) { |
Steven Whitehouse | 01eb7c0 | 2006-06-06 17:31:30 -0400 | [diff] [blame] | 377 | char *prefix = NULL; |
| 378 | unsigned int l = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 379 | char c = 0; |
| 380 | |
| 381 | if (ei->ei_size + ea_size > er->er_data_len) |
| 382 | return -ERANGE; |
| 383 | |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 384 | switch (ea->ea_type) { |
| 385 | case GFS2_EATYPE_USR: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 386 | prefix = "user."; |
| 387 | l = 5; |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 388 | break; |
| 389 | case GFS2_EATYPE_SYS: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 390 | prefix = "system."; |
| 391 | l = 7; |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 392 | break; |
| 393 | case GFS2_EATYPE_SECURITY: |
| 394 | prefix = "security."; |
| 395 | l = 9; |
| 396 | break; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 397 | } |
| 398 | |
Steven Whitehouse | 01eb7c0 | 2006-06-06 17:31:30 -0400 | [diff] [blame] | 399 | BUG_ON(l == 0); |
| 400 | |
Steven Whitehouse | 90cdd20 | 2006-05-22 10:36:25 -0400 | [diff] [blame] | 401 | memcpy(er->er_data + ei->ei_size, prefix, l); |
| 402 | memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 403 | ea->ea_name_len); |
Steven Whitehouse | 90cdd20 | 2006-05-22 10:36:25 -0400 | [diff] [blame] | 404 | memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | ei->ei_size += ea_size; |
| 408 | |
| 409 | return 0; |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * gfs2_ea_list - |
| 414 | * @ip: |
| 415 | * @er: |
| 416 | * |
| 417 | * Returns: actual size of data on success, -errno on error |
| 418 | */ |
| 419 | |
| 420 | int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er) |
| 421 | { |
| 422 | struct gfs2_holder i_gh; |
| 423 | int error; |
| 424 | |
| 425 | if (!er->er_data || !er->er_data_len) { |
| 426 | er->er_data = NULL; |
| 427 | er->er_data_len = 0; |
| 428 | } |
| 429 | |
| 430 | error = gfs2_glock_nq_init(ip->i_gl, |
| 431 | LM_ST_SHARED, LM_FLAG_ANY, |
| 432 | &i_gh); |
| 433 | if (error) |
| 434 | return error; |
| 435 | |
| 436 | if (ip->i_di.di_eattr) { |
| 437 | struct ea_list ei = { .ei_er = er, .ei_size = 0 }; |
| 438 | |
| 439 | error = ea_foreach(ip, ea_list_i, &ei); |
| 440 | if (!error) |
| 441 | error = ei.ei_size; |
| 442 | } |
| 443 | |
| 444 | gfs2_glock_dq_uninit(&i_gh); |
| 445 | |
| 446 | return error; |
| 447 | } |
| 448 | |
| 449 | /** |
| 450 | * ea_get_unstuffed - actually copies the unstuffed data into the |
| 451 | * request buffer |
| 452 | * @ip: |
| 453 | * @ea: |
| 454 | * @data: |
| 455 | * |
| 456 | * Returns: errno |
| 457 | */ |
| 458 | |
| 459 | static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, |
| 460 | char *data) |
| 461 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 462 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 463 | struct buffer_head **bh; |
| 464 | unsigned int amount = GFS2_EA_DATA_LEN(ea); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 465 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 466 | uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea); |
| 467 | unsigned int x; |
| 468 | int error = 0; |
| 469 | |
| 470 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL); |
| 471 | if (!bh) |
| 472 | return -ENOMEM; |
| 473 | |
| 474 | for (x = 0; x < nptrs; x++) { |
| 475 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), |
| 476 | DIO_START, bh + x); |
| 477 | if (error) { |
| 478 | while (x--) |
| 479 | brelse(bh[x]); |
| 480 | goto out; |
| 481 | } |
| 482 | dataptrs++; |
| 483 | } |
| 484 | |
| 485 | for (x = 0; x < nptrs; x++) { |
| 486 | error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT); |
| 487 | if (error) { |
| 488 | for (; x < nptrs; x++) |
| 489 | brelse(bh[x]); |
| 490 | goto out; |
| 491 | } |
| 492 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { |
| 493 | for (; x < nptrs; x++) |
| 494 | brelse(bh[x]); |
| 495 | error = -EIO; |
| 496 | goto out; |
| 497 | } |
| 498 | |
| 499 | memcpy(data, |
| 500 | bh[x]->b_data + sizeof(struct gfs2_meta_header), |
| 501 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); |
| 502 | |
| 503 | amount -= sdp->sd_jbsize; |
| 504 | data += sdp->sd_jbsize; |
| 505 | |
| 506 | brelse(bh[x]); |
| 507 | } |
| 508 | |
| 509 | out: |
| 510 | kfree(bh); |
| 511 | |
| 512 | return error; |
| 513 | } |
| 514 | |
| 515 | int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, |
| 516 | char *data) |
| 517 | { |
| 518 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { |
| 519 | memcpy(data, |
| 520 | GFS2_EA2DATA(el->el_ea), |
| 521 | GFS2_EA_DATA_LEN(el->el_ea)); |
| 522 | return 0; |
| 523 | } else |
| 524 | return ea_get_unstuffed(ip, el->el_ea, data); |
| 525 | } |
| 526 | |
| 527 | /** |
| 528 | * gfs2_ea_get_i - |
| 529 | * @ip: |
| 530 | * @er: |
| 531 | * |
| 532 | * Returns: actual size of data on success, -errno on error |
| 533 | */ |
| 534 | |
| 535 | int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) |
| 536 | { |
| 537 | struct gfs2_ea_location el; |
| 538 | int error; |
| 539 | |
| 540 | if (!ip->i_di.di_eattr) |
| 541 | return -ENODATA; |
| 542 | |
| 543 | error = gfs2_ea_find(ip, er, &el); |
| 544 | if (error) |
| 545 | return error; |
| 546 | if (!el.el_ea) |
| 547 | return -ENODATA; |
| 548 | |
| 549 | if (er->er_data_len) { |
| 550 | if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len) |
| 551 | error = -ERANGE; |
| 552 | else |
| 553 | error = gfs2_ea_get_copy(ip, &el, er->er_data); |
| 554 | } |
| 555 | if (!error) |
| 556 | error = GFS2_EA_DATA_LEN(el.el_ea); |
| 557 | |
| 558 | brelse(el.el_bh); |
| 559 | |
| 560 | return error; |
| 561 | } |
| 562 | |
| 563 | /** |
| 564 | * gfs2_ea_get - |
| 565 | * @ip: |
| 566 | * @er: |
| 567 | * |
| 568 | * Returns: actual size of data on success, -errno on error |
| 569 | */ |
| 570 | |
| 571 | int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er) |
| 572 | { |
| 573 | struct gfs2_holder i_gh; |
| 574 | int error; |
| 575 | |
| 576 | if (!er->er_name_len || |
| 577 | er->er_name_len > GFS2_EA_MAX_NAME_LEN) |
| 578 | return -EINVAL; |
| 579 | if (!er->er_data || !er->er_data_len) { |
| 580 | er->er_data = NULL; |
| 581 | er->er_data_len = 0; |
| 582 | } |
| 583 | |
| 584 | error = gfs2_glock_nq_init(ip->i_gl, |
| 585 | LM_ST_SHARED, LM_FLAG_ANY, |
| 586 | &i_gh); |
| 587 | if (error) |
| 588 | return error; |
| 589 | |
| 590 | error = gfs2_ea_ops[er->er_type]->eo_get(ip, er); |
| 591 | |
| 592 | gfs2_glock_dq_uninit(&i_gh); |
| 593 | |
| 594 | return error; |
| 595 | } |
| 596 | |
| 597 | /** |
| 598 | * ea_alloc_blk - allocates a new block for extended attributes. |
| 599 | * @ip: A pointer to the inode that's getting extended attributes |
| 600 | * @bhp: |
| 601 | * |
| 602 | * Returns: errno |
| 603 | */ |
| 604 | |
| 605 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) |
| 606 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 607 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 608 | struct gfs2_ea_header *ea; |
| 609 | uint64_t block; |
| 610 | |
| 611 | block = gfs2_alloc_meta(ip); |
| 612 | |
| 613 | *bhp = gfs2_meta_new(ip->i_gl, block); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 614 | gfs2_trans_add_bh(ip->i_gl, *bhp, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 615 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
| 616 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); |
| 617 | |
| 618 | ea = GFS2_EA_BH2FIRST(*bhp); |
| 619 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); |
| 620 | ea->ea_type = GFS2_EATYPE_UNUSED; |
| 621 | ea->ea_flags = GFS2_EAFLAG_LAST; |
| 622 | ea->ea_num_ptrs = 0; |
| 623 | |
| 624 | ip->i_di.di_blocks++; |
| 625 | |
| 626 | return 0; |
| 627 | } |
| 628 | |
| 629 | /** |
| 630 | * ea_write - writes the request info to an ea, creating new blocks if |
| 631 | * necessary |
| 632 | * @ip: inode that is being modified |
| 633 | * @ea: the location of the new ea in a block |
| 634 | * @er: the write request |
| 635 | * |
| 636 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags |
| 637 | * |
| 638 | * returns : errno |
| 639 | */ |
| 640 | |
| 641 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, |
| 642 | struct gfs2_ea_request *er) |
| 643 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 644 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 645 | |
| 646 | ea->ea_data_len = cpu_to_be32(er->er_data_len); |
| 647 | ea->ea_name_len = er->er_name_len; |
| 648 | ea->ea_type = er->er_type; |
| 649 | ea->__pad = 0; |
| 650 | |
| 651 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); |
| 652 | |
| 653 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { |
| 654 | ea->ea_num_ptrs = 0; |
| 655 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); |
| 656 | } else { |
| 657 | uint64_t *dataptr = GFS2_EA2DATAPTRS(ea); |
| 658 | const char *data = er->er_data; |
| 659 | unsigned int data_len = er->er_data_len; |
| 660 | unsigned int copy; |
| 661 | unsigned int x; |
| 662 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 663 | 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] | 664 | for (x = 0; x < ea->ea_num_ptrs; x++) { |
| 665 | struct buffer_head *bh; |
| 666 | uint64_t block; |
| 667 | int mh_size = sizeof(struct gfs2_meta_header); |
| 668 | |
| 669 | block = gfs2_alloc_meta(ip); |
| 670 | |
| 671 | bh = gfs2_meta_new(ip->i_gl, block); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 672 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 673 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
| 674 | |
| 675 | ip->i_di.di_blocks++; |
| 676 | |
| 677 | copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize : |
| 678 | data_len; |
| 679 | memcpy(bh->b_data + mh_size, data, copy); |
| 680 | if (copy < sdp->sd_jbsize) |
| 681 | memset(bh->b_data + mh_size + copy, 0, |
| 682 | sdp->sd_jbsize - copy); |
| 683 | |
| 684 | *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr); |
| 685 | data += copy; |
| 686 | data_len -= copy; |
| 687 | |
| 688 | brelse(bh); |
| 689 | } |
| 690 | |
| 691 | gfs2_assert_withdraw(sdp, !data_len); |
| 692 | } |
| 693 | |
| 694 | return 0; |
| 695 | } |
| 696 | |
| 697 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, |
| 698 | struct gfs2_ea_request *er, |
| 699 | void *private); |
| 700 | |
| 701 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 702 | unsigned int blks, |
| 703 | ea_skeleton_call_t skeleton_call, |
| 704 | void *private) |
| 705 | { |
| 706 | struct gfs2_alloc *al; |
| 707 | struct buffer_head *dibh; |
| 708 | int error; |
| 709 | |
| 710 | al = gfs2_alloc_get(ip); |
| 711 | |
| 712 | error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 713 | if (error) |
| 714 | goto out; |
| 715 | |
| 716 | error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid); |
| 717 | if (error) |
| 718 | goto out_gunlock_q; |
| 719 | |
| 720 | al->al_requested = blks; |
| 721 | |
| 722 | error = gfs2_inplace_reserve(ip); |
| 723 | if (error) |
| 724 | goto out_gunlock_q; |
| 725 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 726 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 727 | blks + al->al_rgd->rd_ri.ri_length + |
| 728 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); |
| 729 | if (error) |
| 730 | goto out_ipres; |
| 731 | |
| 732 | error = skeleton_call(ip, er, private); |
| 733 | if (error) |
| 734 | goto out_end_trans; |
| 735 | |
| 736 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 737 | if (!error) { |
| 738 | if (er->er_flags & GFS2_ERF_MODE) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 739 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 740 | (ip->i_di.di_mode & S_IFMT) == |
| 741 | (er->er_mode & S_IFMT)); |
| 742 | ip->i_di.di_mode = er->er_mode; |
| 743 | } |
| 744 | ip->i_di.di_ctime = get_seconds(); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 745 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 746 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 747 | brelse(dibh); |
| 748 | } |
| 749 | |
| 750 | out_end_trans: |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 751 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 752 | |
| 753 | out_ipres: |
| 754 | gfs2_inplace_release(ip); |
| 755 | |
| 756 | out_gunlock_q: |
| 757 | gfs2_quota_unlock(ip); |
| 758 | |
| 759 | out: |
| 760 | gfs2_alloc_put(ip); |
| 761 | |
| 762 | return error; |
| 763 | } |
| 764 | |
| 765 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 766 | void *private) |
| 767 | { |
| 768 | struct buffer_head *bh; |
| 769 | int error; |
| 770 | |
| 771 | error = ea_alloc_blk(ip, &bh); |
| 772 | if (error) |
| 773 | return error; |
| 774 | |
| 775 | ip->i_di.di_eattr = bh->b_blocknr; |
| 776 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); |
| 777 | |
| 778 | brelse(bh); |
| 779 | |
| 780 | return error; |
| 781 | } |
| 782 | |
| 783 | /** |
| 784 | * ea_init - initializes a new eattr block |
| 785 | * @ip: |
| 786 | * @er: |
| 787 | * |
| 788 | * Returns: errno |
| 789 | */ |
| 790 | |
| 791 | static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er) |
| 792 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 793 | unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 794 | unsigned int blks = 1; |
| 795 | |
| 796 | if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize) |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 797 | blks += DIV_ROUND_UP(er->er_data_len, jbsize); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 798 | |
| 799 | return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL); |
| 800 | } |
| 801 | |
| 802 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) |
| 803 | { |
| 804 | uint32_t ea_size = GFS2_EA_SIZE(ea); |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 805 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
| 806 | ea_size); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 807 | uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
| 808 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; |
| 809 | |
| 810 | ea->ea_rec_len = cpu_to_be32(ea_size); |
| 811 | ea->ea_flags ^= last; |
| 812 | |
| 813 | new->ea_rec_len = cpu_to_be32(new_size); |
| 814 | new->ea_flags = last; |
| 815 | |
| 816 | return new; |
| 817 | } |
| 818 | |
| 819 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, |
| 820 | struct gfs2_ea_location *el) |
| 821 | { |
| 822 | struct gfs2_ea_header *ea = el->el_ea; |
| 823 | struct gfs2_ea_header *prev = el->el_prev; |
| 824 | uint32_t len; |
| 825 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 826 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 827 | |
| 828 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { |
| 829 | ea->ea_type = GFS2_EATYPE_UNUSED; |
| 830 | return; |
| 831 | } else if (GFS2_EA2NEXT(prev) != ea) { |
| 832 | prev = GFS2_EA2NEXT(prev); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 833 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 834 | } |
| 835 | |
| 836 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| 837 | prev->ea_rec_len = cpu_to_be32(len); |
| 838 | |
| 839 | if (GFS2_EA_IS_LAST(ea)) |
| 840 | prev->ea_flags |= GFS2_EAFLAG_LAST; |
| 841 | } |
| 842 | |
| 843 | struct ea_set { |
| 844 | int ea_split; |
| 845 | |
| 846 | struct gfs2_ea_request *es_er; |
| 847 | struct gfs2_ea_location *es_el; |
| 848 | |
| 849 | struct buffer_head *es_bh; |
| 850 | struct gfs2_ea_header *es_ea; |
| 851 | }; |
| 852 | |
| 853 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, |
| 854 | struct gfs2_ea_header *ea, struct ea_set *es) |
| 855 | { |
| 856 | struct gfs2_ea_request *er = es->es_er; |
| 857 | struct buffer_head *dibh; |
| 858 | int error; |
| 859 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 860 | 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] | 861 | if (error) |
| 862 | return error; |
| 863 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 864 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 865 | |
| 866 | if (es->ea_split) |
| 867 | ea = ea_split_ea(ea); |
| 868 | |
| 869 | ea_write(ip, ea, er); |
| 870 | |
| 871 | if (es->es_el) |
| 872 | ea_set_remove_stuffed(ip, es->es_el); |
| 873 | |
| 874 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 875 | if (error) |
| 876 | goto out; |
| 877 | |
| 878 | if (er->er_flags & GFS2_ERF_MODE) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 879 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 880 | (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT)); |
| 881 | ip->i_di.di_mode = er->er_mode; |
| 882 | } |
| 883 | ip->i_di.di_ctime = get_seconds(); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 884 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 885 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 886 | brelse(dibh); |
| 887 | out: |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 888 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 889 | |
| 890 | return error; |
| 891 | } |
| 892 | |
| 893 | static int ea_set_simple_alloc(struct gfs2_inode *ip, |
| 894 | struct gfs2_ea_request *er, void *private) |
| 895 | { |
| 896 | struct ea_set *es = private; |
| 897 | struct gfs2_ea_header *ea = es->es_ea; |
| 898 | int error; |
| 899 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 900 | gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 901 | |
| 902 | if (es->ea_split) |
| 903 | ea = ea_split_ea(ea); |
| 904 | |
| 905 | error = ea_write(ip, ea, er); |
| 906 | if (error) |
| 907 | return error; |
| 908 | |
| 909 | if (es->es_el) |
| 910 | ea_set_remove_stuffed(ip, es->es_el); |
| 911 | |
| 912 | return 0; |
| 913 | } |
| 914 | |
| 915 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, |
| 916 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| 917 | void *private) |
| 918 | { |
| 919 | struct ea_set *es = private; |
| 920 | unsigned int size; |
| 921 | int stuffed; |
| 922 | int error; |
| 923 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 924 | stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er, &size); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 925 | |
| 926 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { |
| 927 | if (GFS2_EA_REC_LEN(ea) < size) |
| 928 | return 0; |
| 929 | if (!GFS2_EA_IS_STUFFED(ea)) { |
| 930 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); |
| 931 | if (error) |
| 932 | return error; |
| 933 | } |
| 934 | es->ea_split = 0; |
| 935 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) |
| 936 | es->ea_split = 1; |
| 937 | else |
| 938 | return 0; |
| 939 | |
| 940 | if (stuffed) { |
| 941 | error = ea_set_simple_noalloc(ip, bh, ea, es); |
| 942 | if (error) |
| 943 | return error; |
| 944 | } else { |
| 945 | unsigned int blks; |
| 946 | |
| 947 | es->es_bh = bh; |
| 948 | es->es_ea = ea; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 949 | blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 950 | GFS2_SB(&ip->i_inode)->sd_jbsize); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 951 | |
| 952 | error = ea_alloc_skeleton(ip, es->es_er, blks, |
| 953 | ea_set_simple_alloc, es); |
| 954 | if (error) |
| 955 | return error; |
| 956 | } |
| 957 | |
| 958 | return 1; |
| 959 | } |
| 960 | |
| 961 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 962 | void *private) |
| 963 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 964 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 965 | struct buffer_head *indbh, *newbh; |
| 966 | uint64_t *eablk; |
| 967 | int error; |
| 968 | int mh_size = sizeof(struct gfs2_meta_header); |
| 969 | |
| 970 | if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) { |
| 971 | uint64_t *end; |
| 972 | |
| 973 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, |
| 974 | DIO_START | DIO_WAIT, &indbh); |
| 975 | if (error) |
| 976 | return error; |
| 977 | |
| 978 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { |
| 979 | error = -EIO; |
| 980 | goto out; |
| 981 | } |
| 982 | |
| 983 | eablk = (uint64_t *)(indbh->b_data + mh_size); |
| 984 | end = eablk + sdp->sd_inptrs; |
| 985 | |
| 986 | for (; eablk < end; eablk++) |
| 987 | if (!*eablk) |
| 988 | break; |
| 989 | |
| 990 | if (eablk == end) { |
| 991 | error = -ENOSPC; |
| 992 | goto out; |
| 993 | } |
| 994 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 995 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 996 | } else { |
| 997 | uint64_t blk; |
| 998 | |
| 999 | blk = gfs2_alloc_meta(ip); |
| 1000 | |
| 1001 | indbh = gfs2_meta_new(ip->i_gl, blk); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1002 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1003 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
| 1004 | gfs2_buffer_clear_tail(indbh, mh_size); |
| 1005 | |
| 1006 | eablk = (uint64_t *)(indbh->b_data + mh_size); |
| 1007 | *eablk = cpu_to_be64(ip->i_di.di_eattr); |
| 1008 | ip->i_di.di_eattr = blk; |
| 1009 | ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT; |
| 1010 | ip->i_di.di_blocks++; |
| 1011 | |
| 1012 | eablk++; |
| 1013 | } |
| 1014 | |
| 1015 | error = ea_alloc_blk(ip, &newbh); |
| 1016 | if (error) |
| 1017 | goto out; |
| 1018 | |
| 1019 | *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr); |
| 1020 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); |
| 1021 | brelse(newbh); |
| 1022 | if (error) |
| 1023 | goto out; |
| 1024 | |
| 1025 | if (private) |
| 1026 | ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private); |
| 1027 | |
| 1028 | out: |
| 1029 | brelse(indbh); |
| 1030 | |
| 1031 | return error; |
| 1032 | } |
| 1033 | |
| 1034 | static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 1035 | struct gfs2_ea_location *el) |
| 1036 | { |
| 1037 | struct ea_set es; |
| 1038 | unsigned int blks = 2; |
| 1039 | int error; |
| 1040 | |
| 1041 | memset(&es, 0, sizeof(struct ea_set)); |
| 1042 | es.es_er = er; |
| 1043 | es.es_el = el; |
| 1044 | |
| 1045 | error = ea_foreach(ip, ea_set_simple, &es); |
| 1046 | if (error > 0) |
| 1047 | return 0; |
| 1048 | if (error) |
| 1049 | return error; |
| 1050 | |
| 1051 | if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) |
| 1052 | blks++; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1053 | if (GFS2_EAREQ_SIZE_STUFFED(er) > GFS2_SB(&ip->i_inode)->sd_jbsize) |
| 1054 | 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] | 1055 | |
| 1056 | return ea_alloc_skeleton(ip, er, blks, ea_set_block, el); |
| 1057 | } |
| 1058 | |
| 1059 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, |
| 1060 | struct gfs2_ea_location *el) |
| 1061 | { |
| 1062 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { |
| 1063 | el->el_prev = GFS2_EA2NEXT(el->el_prev); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1064 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1065 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); |
| 1066 | } |
| 1067 | |
| 1068 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0); |
| 1069 | } |
| 1070 | |
| 1071 | int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) |
| 1072 | { |
| 1073 | struct gfs2_ea_location el; |
| 1074 | int error; |
| 1075 | |
| 1076 | if (!ip->i_di.di_eattr) { |
| 1077 | if (er->er_flags & XATTR_REPLACE) |
| 1078 | return -ENODATA; |
| 1079 | return ea_init(ip, er); |
| 1080 | } |
| 1081 | |
| 1082 | error = gfs2_ea_find(ip, er, &el); |
| 1083 | if (error) |
| 1084 | return error; |
| 1085 | |
| 1086 | if (el.el_ea) { |
| 1087 | if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) { |
| 1088 | brelse(el.el_bh); |
| 1089 | return -EPERM; |
| 1090 | } |
| 1091 | |
| 1092 | error = -EEXIST; |
| 1093 | if (!(er->er_flags & XATTR_CREATE)) { |
| 1094 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); |
| 1095 | error = ea_set_i(ip, er, &el); |
| 1096 | if (!error && unstuffed) |
| 1097 | ea_set_remove_unstuffed(ip, &el); |
| 1098 | } |
| 1099 | |
| 1100 | brelse(el.el_bh); |
| 1101 | } else { |
| 1102 | error = -ENODATA; |
| 1103 | if (!(er->er_flags & XATTR_REPLACE)) |
| 1104 | error = ea_set_i(ip, er, NULL); |
| 1105 | } |
| 1106 | |
| 1107 | return error; |
| 1108 | } |
| 1109 | |
| 1110 | int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er) |
| 1111 | { |
| 1112 | struct gfs2_holder i_gh; |
| 1113 | int error; |
| 1114 | |
| 1115 | if (!er->er_name_len || |
| 1116 | er->er_name_len > GFS2_EA_MAX_NAME_LEN) |
| 1117 | return -EINVAL; |
| 1118 | if (!er->er_data || !er->er_data_len) { |
| 1119 | er->er_data = NULL; |
| 1120 | er->er_data_len = 0; |
| 1121 | } |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1122 | error = ea_check_size(GFS2_SB(&ip->i_inode), er); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1123 | if (error) |
| 1124 | return error; |
| 1125 | |
| 1126 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
| 1127 | if (error) |
| 1128 | return error; |
| 1129 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1130 | if (IS_IMMUTABLE(&ip->i_inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1131 | error = -EPERM; |
| 1132 | else |
| 1133 | error = gfs2_ea_ops[er->er_type]->eo_set(ip, er); |
| 1134 | |
| 1135 | gfs2_glock_dq_uninit(&i_gh); |
| 1136 | |
| 1137 | return error; |
| 1138 | } |
| 1139 | |
| 1140 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) |
| 1141 | { |
| 1142 | struct gfs2_ea_header *ea = el->el_ea; |
| 1143 | struct gfs2_ea_header *prev = el->el_prev; |
| 1144 | struct buffer_head *dibh; |
| 1145 | int error; |
| 1146 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1147 | 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] | 1148 | if (error) |
| 1149 | return error; |
| 1150 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1151 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1152 | |
| 1153 | if (prev) { |
| 1154 | uint32_t len; |
| 1155 | |
| 1156 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| 1157 | prev->ea_rec_len = cpu_to_be32(len); |
| 1158 | |
| 1159 | if (GFS2_EA_IS_LAST(ea)) |
| 1160 | prev->ea_flags |= GFS2_EAFLAG_LAST; |
| 1161 | } else |
| 1162 | ea->ea_type = GFS2_EATYPE_UNUSED; |
| 1163 | |
| 1164 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1165 | if (!error) { |
| 1166 | ip->i_di.di_ctime = get_seconds(); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1167 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1168 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 1169 | brelse(dibh); |
| 1170 | } |
| 1171 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1172 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1173 | |
| 1174 | return error; |
| 1175 | } |
| 1176 | |
| 1177 | int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) |
| 1178 | { |
| 1179 | struct gfs2_ea_location el; |
| 1180 | int error; |
| 1181 | |
| 1182 | if (!ip->i_di.di_eattr) |
| 1183 | return -ENODATA; |
| 1184 | |
| 1185 | error = gfs2_ea_find(ip, er, &el); |
| 1186 | if (error) |
| 1187 | return error; |
| 1188 | if (!el.el_ea) |
| 1189 | return -ENODATA; |
| 1190 | |
| 1191 | if (GFS2_EA_IS_STUFFED(el.el_ea)) |
| 1192 | error = ea_remove_stuffed(ip, &el); |
| 1193 | else |
| 1194 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, |
| 1195 | 0); |
| 1196 | |
| 1197 | brelse(el.el_bh); |
| 1198 | |
| 1199 | return error; |
| 1200 | } |
| 1201 | |
| 1202 | /** |
| 1203 | * gfs2_ea_remove - sets (or creates or replaces) an extended attribute |
| 1204 | * @ip: pointer to the inode of the target file |
| 1205 | * @er: request information |
| 1206 | * |
| 1207 | * Returns: errno |
| 1208 | */ |
| 1209 | |
| 1210 | int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er) |
| 1211 | { |
| 1212 | struct gfs2_holder i_gh; |
| 1213 | int error; |
| 1214 | |
| 1215 | if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN) |
| 1216 | return -EINVAL; |
| 1217 | |
| 1218 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
| 1219 | if (error) |
| 1220 | return error; |
| 1221 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1222 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1223 | error = -EPERM; |
| 1224 | else |
| 1225 | error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er); |
| 1226 | |
| 1227 | gfs2_glock_dq_uninit(&i_gh); |
| 1228 | |
| 1229 | return error; |
| 1230 | } |
| 1231 | |
| 1232 | static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip, |
| 1233 | struct gfs2_ea_header *ea, char *data) |
| 1234 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1235 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1236 | struct buffer_head **bh; |
| 1237 | unsigned int amount = GFS2_EA_DATA_LEN(ea); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 1238 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1239 | uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea); |
| 1240 | unsigned int x; |
| 1241 | int error; |
| 1242 | |
| 1243 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL); |
| 1244 | if (!bh) |
| 1245 | return -ENOMEM; |
| 1246 | |
| 1247 | error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0); |
| 1248 | if (error) |
| 1249 | goto out; |
| 1250 | |
| 1251 | for (x = 0; x < nptrs; x++) { |
| 1252 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), |
| 1253 | DIO_START, bh + x); |
| 1254 | if (error) { |
| 1255 | while (x--) |
| 1256 | brelse(bh[x]); |
| 1257 | goto fail; |
| 1258 | } |
| 1259 | dataptrs++; |
| 1260 | } |
| 1261 | |
| 1262 | for (x = 0; x < nptrs; x++) { |
| 1263 | error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT); |
| 1264 | if (error) { |
| 1265 | for (; x < nptrs; x++) |
| 1266 | brelse(bh[x]); |
| 1267 | goto fail; |
| 1268 | } |
| 1269 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { |
| 1270 | for (; x < nptrs; x++) |
| 1271 | brelse(bh[x]); |
| 1272 | error = -EIO; |
| 1273 | goto fail; |
| 1274 | } |
| 1275 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1276 | gfs2_trans_add_bh(ip->i_gl, bh[x], 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1277 | |
| 1278 | memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), |
| 1279 | data, |
| 1280 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); |
| 1281 | |
| 1282 | amount -= sdp->sd_jbsize; |
| 1283 | data += sdp->sd_jbsize; |
| 1284 | |
| 1285 | brelse(bh[x]); |
| 1286 | } |
| 1287 | |
| 1288 | out: |
| 1289 | kfree(bh); |
| 1290 | |
| 1291 | return error; |
| 1292 | |
| 1293 | fail: |
| 1294 | gfs2_trans_end(sdp); |
| 1295 | kfree(bh); |
| 1296 | |
| 1297 | return error; |
| 1298 | } |
| 1299 | |
| 1300 | int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el, |
| 1301 | struct iattr *attr, char *data) |
| 1302 | { |
| 1303 | struct buffer_head *dibh; |
| 1304 | int error; |
| 1305 | |
| 1306 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1307 | 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] | 1308 | if (error) |
| 1309 | return error; |
| 1310 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1311 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1312 | memcpy(GFS2_EA2DATA(el->el_ea), |
| 1313 | data, |
| 1314 | GFS2_EA_DATA_LEN(el->el_ea)); |
| 1315 | } else |
| 1316 | error = ea_acl_chmod_unstuffed(ip, el->el_ea, data); |
| 1317 | |
| 1318 | if (error) |
| 1319 | return error; |
| 1320 | |
| 1321 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1322 | if (!error) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1323 | error = inode_setattr(&ip->i_inode, attr); |
| 1324 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1325 | gfs2_inode_attr_out(ip); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1326 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1327 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 1328 | brelse(dibh); |
| 1329 | } |
| 1330 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1331 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1332 | |
| 1333 | return error; |
| 1334 | } |
| 1335 | |
| 1336 | static int ea_dealloc_indirect(struct gfs2_inode *ip) |
| 1337 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1338 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1339 | struct gfs2_rgrp_list rlist; |
| 1340 | struct buffer_head *indbh, *dibh; |
| 1341 | uint64_t *eablk, *end; |
| 1342 | unsigned int rg_blocks = 0; |
| 1343 | uint64_t bstart = 0; |
| 1344 | unsigned int blen = 0; |
| 1345 | unsigned int blks = 0; |
| 1346 | unsigned int x; |
| 1347 | int error; |
| 1348 | |
| 1349 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); |
| 1350 | |
| 1351 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, |
| 1352 | DIO_START | DIO_WAIT, &indbh); |
| 1353 | if (error) |
| 1354 | return error; |
| 1355 | |
| 1356 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { |
| 1357 | error = -EIO; |
| 1358 | goto out; |
| 1359 | } |
| 1360 | |
| 1361 | eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
| 1362 | end = eablk + sdp->sd_inptrs; |
| 1363 | |
| 1364 | for (; eablk < end; eablk++) { |
| 1365 | uint64_t bn; |
| 1366 | |
| 1367 | if (!*eablk) |
| 1368 | break; |
| 1369 | bn = be64_to_cpu(*eablk); |
| 1370 | |
| 1371 | if (bstart + blen == bn) |
| 1372 | blen++; |
| 1373 | else { |
| 1374 | if (bstart) |
| 1375 | gfs2_rlist_add(sdp, &rlist, bstart); |
| 1376 | bstart = bn; |
| 1377 | blen = 1; |
| 1378 | } |
| 1379 | blks++; |
| 1380 | } |
| 1381 | if (bstart) |
| 1382 | gfs2_rlist_add(sdp, &rlist, bstart); |
| 1383 | else |
| 1384 | goto out; |
| 1385 | |
| 1386 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0); |
| 1387 | |
| 1388 | for (x = 0; x < rlist.rl_rgrps; x++) { |
| 1389 | struct gfs2_rgrpd *rgd; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 1390 | rgd = rlist.rl_ghs[x].gh_gl->gl_object; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1391 | rg_blocks += rgd->rd_ri.ri_length; |
| 1392 | } |
| 1393 | |
| 1394 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); |
| 1395 | if (error) |
| 1396 | goto out_rlist_free; |
| 1397 | |
| 1398 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + |
| 1399 | RES_INDIRECT + RES_STATFS + |
| 1400 | RES_QUOTA, blks); |
| 1401 | if (error) |
| 1402 | goto out_gunlock; |
| 1403 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1404 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1405 | |
| 1406 | eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
| 1407 | bstart = 0; |
| 1408 | blen = 0; |
| 1409 | |
| 1410 | for (; eablk < end; eablk++) { |
| 1411 | uint64_t bn; |
| 1412 | |
| 1413 | if (!*eablk) |
| 1414 | break; |
| 1415 | bn = be64_to_cpu(*eablk); |
| 1416 | |
| 1417 | if (bstart + blen == bn) |
| 1418 | blen++; |
| 1419 | else { |
| 1420 | if (bstart) |
| 1421 | gfs2_free_meta(ip, bstart, blen); |
| 1422 | bstart = bn; |
| 1423 | blen = 1; |
| 1424 | } |
| 1425 | |
| 1426 | *eablk = 0; |
| 1427 | if (!ip->i_di.di_blocks) |
| 1428 | gfs2_consist_inode(ip); |
| 1429 | ip->i_di.di_blocks--; |
| 1430 | } |
| 1431 | if (bstart) |
| 1432 | gfs2_free_meta(ip, bstart, blen); |
| 1433 | |
| 1434 | ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT; |
| 1435 | |
| 1436 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1437 | if (!error) { |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1438 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1439 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 1440 | brelse(dibh); |
| 1441 | } |
| 1442 | |
| 1443 | gfs2_trans_end(sdp); |
| 1444 | |
| 1445 | out_gunlock: |
| 1446 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); |
| 1447 | |
| 1448 | out_rlist_free: |
| 1449 | gfs2_rlist_free(&rlist); |
| 1450 | |
| 1451 | out: |
| 1452 | brelse(indbh); |
| 1453 | |
| 1454 | return error; |
| 1455 | } |
| 1456 | |
| 1457 | static int ea_dealloc_block(struct gfs2_inode *ip) |
| 1458 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1459 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1460 | struct gfs2_alloc *al = &ip->i_alloc; |
| 1461 | struct gfs2_rgrpd *rgd; |
| 1462 | struct buffer_head *dibh; |
| 1463 | int error; |
| 1464 | |
| 1465 | rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr); |
| 1466 | if (!rgd) { |
| 1467 | gfs2_consist_inode(ip); |
| 1468 | return -EIO; |
| 1469 | } |
| 1470 | |
| 1471 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, |
| 1472 | &al->al_rgd_gh); |
| 1473 | if (error) |
| 1474 | return error; |
| 1475 | |
| 1476 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + |
| 1477 | RES_STATFS + RES_QUOTA, 1); |
| 1478 | if (error) |
| 1479 | goto out_gunlock; |
| 1480 | |
| 1481 | gfs2_free_meta(ip, ip->i_di.di_eattr, 1); |
| 1482 | |
| 1483 | ip->i_di.di_eattr = 0; |
| 1484 | if (!ip->i_di.di_blocks) |
| 1485 | gfs2_consist_inode(ip); |
| 1486 | ip->i_di.di_blocks--; |
| 1487 | |
| 1488 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1489 | if (!error) { |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1490 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1491 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 1492 | brelse(dibh); |
| 1493 | } |
| 1494 | |
| 1495 | gfs2_trans_end(sdp); |
| 1496 | |
| 1497 | out_gunlock: |
| 1498 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
| 1499 | |
| 1500 | return error; |
| 1501 | } |
| 1502 | |
| 1503 | /** |
| 1504 | * gfs2_ea_dealloc - deallocate the extended attribute fork |
| 1505 | * @ip: the inode |
| 1506 | * |
| 1507 | * Returns: errno |
| 1508 | */ |
| 1509 | |
| 1510 | int gfs2_ea_dealloc(struct gfs2_inode *ip) |
| 1511 | { |
| 1512 | struct gfs2_alloc *al; |
| 1513 | int error; |
| 1514 | |
| 1515 | al = gfs2_alloc_get(ip); |
| 1516 | |
| 1517 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 1518 | if (error) |
| 1519 | goto out_alloc; |
| 1520 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1521 | error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1522 | if (error) |
| 1523 | goto out_quota; |
| 1524 | |
| 1525 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); |
| 1526 | if (error) |
| 1527 | goto out_rindex; |
| 1528 | |
| 1529 | if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) { |
| 1530 | error = ea_dealloc_indirect(ip); |
| 1531 | if (error) |
| 1532 | goto out_rindex; |
| 1533 | } |
| 1534 | |
| 1535 | error = ea_dealloc_block(ip); |
| 1536 | |
| 1537 | out_rindex: |
| 1538 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
| 1539 | |
| 1540 | out_quota: |
| 1541 | gfs2_quota_unhold(ip); |
| 1542 | |
| 1543 | out_alloc: |
| 1544 | gfs2_alloc_put(ip); |
| 1545 | |
| 1546 | return error; |
| 1547 | } |
| 1548 | |