Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * Further, this software is distributed without any warranty that it is |
| 13 | * free of the rightful claim of any third person regarding infringement |
| 14 | * or the like. Any license provided herein, whether implied or |
| 15 | * otherwise, applies only to this software file. Patent licenses, if |
| 16 | * any, provided herein do not apply to combinations of this program with |
| 17 | * other software, or any other product whatsoever. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write the Free Software Foundation, Inc., 59 |
| 21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 22 | * |
| 23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, |
| 24 | * Mountain View, CA 94043, or: |
| 25 | * |
| 26 | * http://www.sgi.com |
| 27 | * |
| 28 | * For further information regarding this notice, see: |
| 29 | * |
| 30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ |
| 31 | */ |
| 32 | |
| 33 | #include "xfs.h" |
| 34 | |
| 35 | #include "xfs_macros.h" |
| 36 | #include "xfs_types.h" |
| 37 | #include "xfs_inum.h" |
| 38 | #include "xfs_log.h" |
| 39 | #include "xfs_trans.h" |
| 40 | #include "xfs_sb.h" |
| 41 | #include "xfs_dir.h" |
| 42 | #include "xfs_dir2.h" |
| 43 | #include "xfs_dmapi.h" |
| 44 | #include "xfs_mount.h" |
| 45 | #include "xfs_alloc_btree.h" |
| 46 | #include "xfs_bmap_btree.h" |
| 47 | #include "xfs_ialloc_btree.h" |
| 48 | #include "xfs_alloc.h" |
| 49 | #include "xfs_btree.h" |
| 50 | #include "xfs_attr_sf.h" |
| 51 | #include "xfs_dir_sf.h" |
| 52 | #include "xfs_dir2_sf.h" |
| 53 | #include "xfs_dinode.h" |
| 54 | #include "xfs_inode.h" |
| 55 | #include "xfs_bmap.h" |
| 56 | #include "xfs_da_btree.h" |
| 57 | #include "xfs_dir_leaf.h" |
| 58 | #include "xfs_error.h" |
| 59 | |
| 60 | /* |
| 61 | * xfs_dir.c |
| 62 | * |
| 63 | * Provide the external interfaces to manage directories. |
| 64 | */ |
| 65 | |
| 66 | /*======================================================================== |
| 67 | * Function prototypes for the kernel. |
| 68 | *========================================================================*/ |
| 69 | |
| 70 | /* |
| 71 | * Functions for the dirops interfaces. |
| 72 | */ |
| 73 | static void xfs_dir_mount(struct xfs_mount *mp); |
| 74 | |
| 75 | static int xfs_dir_isempty(struct xfs_inode *dp); |
| 76 | |
| 77 | static int xfs_dir_init(struct xfs_trans *trans, |
| 78 | struct xfs_inode *dir, |
| 79 | struct xfs_inode *parent_dir); |
| 80 | |
| 81 | static int xfs_dir_createname(struct xfs_trans *trans, |
| 82 | struct xfs_inode *dp, |
| 83 | char *name_string, |
| 84 | int name_len, |
| 85 | xfs_ino_t inode_number, |
| 86 | xfs_fsblock_t *firstblock, |
| 87 | xfs_bmap_free_t *flist, |
| 88 | xfs_extlen_t total); |
| 89 | |
| 90 | static int xfs_dir_lookup(struct xfs_trans *tp, |
| 91 | struct xfs_inode *dp, |
| 92 | char *name_string, |
| 93 | int name_length, |
| 94 | xfs_ino_t *inode_number); |
| 95 | |
| 96 | static int xfs_dir_removename(struct xfs_trans *trans, |
| 97 | struct xfs_inode *dp, |
| 98 | char *name_string, |
| 99 | int name_length, |
| 100 | xfs_ino_t ino, |
| 101 | xfs_fsblock_t *firstblock, |
| 102 | xfs_bmap_free_t *flist, |
| 103 | xfs_extlen_t total); |
| 104 | |
| 105 | static int xfs_dir_getdents(struct xfs_trans *tp, |
| 106 | struct xfs_inode *dp, |
| 107 | struct uio *uiop, |
| 108 | int *eofp); |
| 109 | |
| 110 | static int xfs_dir_replace(struct xfs_trans *tp, |
| 111 | struct xfs_inode *dp, |
| 112 | char *name_string, |
| 113 | int name_length, |
| 114 | xfs_ino_t inode_number, |
| 115 | xfs_fsblock_t *firstblock, |
| 116 | xfs_bmap_free_t *flist, |
| 117 | xfs_extlen_t total); |
| 118 | |
| 119 | static int xfs_dir_canenter(struct xfs_trans *tp, |
| 120 | struct xfs_inode *dp, |
| 121 | char *name_string, |
| 122 | int name_length); |
| 123 | |
| 124 | static int xfs_dir_shortform_validate_ondisk(xfs_mount_t *mp, |
| 125 | xfs_dinode_t *dip); |
| 126 | |
| 127 | xfs_dirops_t xfsv1_dirops = { |
| 128 | .xd_mount = xfs_dir_mount, |
| 129 | .xd_isempty = xfs_dir_isempty, |
| 130 | .xd_init = xfs_dir_init, |
| 131 | .xd_createname = xfs_dir_createname, |
| 132 | .xd_lookup = xfs_dir_lookup, |
| 133 | .xd_removename = xfs_dir_removename, |
| 134 | .xd_getdents = xfs_dir_getdents, |
| 135 | .xd_replace = xfs_dir_replace, |
| 136 | .xd_canenter = xfs_dir_canenter, |
| 137 | .xd_shortform_validate_ondisk = xfs_dir_shortform_validate_ondisk, |
| 138 | .xd_shortform_to_single = xfs_dir_shortform_to_leaf, |
| 139 | }; |
| 140 | |
| 141 | /* |
| 142 | * Internal routines when dirsize == XFS_LBSIZE(mp). |
| 143 | */ |
| 144 | STATIC int xfs_dir_leaf_lookup(xfs_da_args_t *args); |
| 145 | STATIC int xfs_dir_leaf_removename(xfs_da_args_t *args, int *number_entries, |
| 146 | int *total_namebytes); |
| 147 | STATIC int xfs_dir_leaf_getdents(xfs_trans_t *trans, xfs_inode_t *dp, |
| 148 | uio_t *uio, int *eofp, |
| 149 | xfs_dirent_t *dbp, |
| 150 | xfs_dir_put_t put); |
| 151 | STATIC int xfs_dir_leaf_replace(xfs_da_args_t *args); |
| 152 | |
| 153 | /* |
| 154 | * Internal routines when dirsize > XFS_LBSIZE(mp). |
| 155 | */ |
| 156 | STATIC int xfs_dir_node_addname(xfs_da_args_t *args); |
| 157 | STATIC int xfs_dir_node_lookup(xfs_da_args_t *args); |
| 158 | STATIC int xfs_dir_node_removename(xfs_da_args_t *args); |
| 159 | STATIC int xfs_dir_node_getdents(xfs_trans_t *trans, xfs_inode_t *dp, |
| 160 | uio_t *uio, int *eofp, |
| 161 | xfs_dirent_t *dbp, |
| 162 | xfs_dir_put_t put); |
| 163 | STATIC int xfs_dir_node_replace(xfs_da_args_t *args); |
| 164 | |
| 165 | #if defined(XFS_DIR_TRACE) |
| 166 | ktrace_t *xfs_dir_trace_buf; |
| 167 | #endif |
| 168 | |
| 169 | |
| 170 | /*======================================================================== |
| 171 | * Overall external interface routines. |
| 172 | *========================================================================*/ |
| 173 | |
| 174 | xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot; |
| 175 | |
| 176 | /* |
| 177 | * One-time startup routine called from xfs_init(). |
| 178 | */ |
| 179 | void |
| 180 | xfs_dir_startup(void) |
| 181 | { |
| 182 | xfs_dir_hash_dot = xfs_da_hashname(".", 1); |
| 183 | xfs_dir_hash_dotdot = xfs_da_hashname("..", 2); |
| 184 | } |
| 185 | |
| 186 | /* |
| 187 | * Initialize directory-related fields in the mount structure. |
| 188 | */ |
| 189 | static void |
| 190 | xfs_dir_mount(xfs_mount_t *mp) |
| 191 | { |
| 192 | uint shortcount, leafcount, count; |
| 193 | |
| 194 | mp->m_dirversion = 1; |
| 195 | shortcount = (mp->m_attroffset - (uint)sizeof(xfs_dir_sf_hdr_t)) / |
| 196 | (uint)sizeof(xfs_dir_sf_entry_t); |
| 197 | leafcount = (XFS_LBSIZE(mp) - (uint)sizeof(xfs_dir_leaf_hdr_t)) / |
| 198 | ((uint)sizeof(xfs_dir_leaf_entry_t) + |
| 199 | (uint)sizeof(xfs_dir_leaf_name_t)); |
| 200 | count = shortcount > leafcount ? shortcount : leafcount; |
| 201 | mp->m_dircook_elog = xfs_da_log2_roundup(count + 1); |
| 202 | ASSERT(mp->m_dircook_elog <= mp->m_sb.sb_blocklog); |
| 203 | mp->m_dir_node_ents = mp->m_attr_node_ents = |
| 204 | (XFS_LBSIZE(mp) - (uint)sizeof(xfs_da_node_hdr_t)) / |
| 205 | (uint)sizeof(xfs_da_node_entry_t); |
| 206 | mp->m_dir_magicpct = (XFS_LBSIZE(mp) * 37) / 100; |
| 207 | mp->m_dirblksize = mp->m_sb.sb_blocksize; |
| 208 | mp->m_dirblkfsbs = 1; |
| 209 | } |
| 210 | |
| 211 | /* |
| 212 | * Return 1 if directory contains only "." and "..". |
| 213 | */ |
| 214 | static int |
| 215 | xfs_dir_isempty(xfs_inode_t *dp) |
| 216 | { |
| 217 | xfs_dir_sf_hdr_t *hdr; |
| 218 | |
| 219 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); |
| 220 | if (dp->i_d.di_size == 0) |
| 221 | return(1); |
| 222 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
| 223 | return(0); |
| 224 | hdr = (xfs_dir_sf_hdr_t *)dp->i_df.if_u1.if_data; |
| 225 | return(hdr->count == 0); |
| 226 | } |
| 227 | |
| 228 | /* |
| 229 | * Initialize a directory with its "." and ".." entries. |
| 230 | */ |
| 231 | static int |
| 232 | xfs_dir_init(xfs_trans_t *trans, xfs_inode_t *dir, xfs_inode_t *parent_dir) |
| 233 | { |
| 234 | xfs_da_args_t args; |
| 235 | int error; |
| 236 | |
| 237 | memset((char *)&args, 0, sizeof(args)); |
| 238 | args.dp = dir; |
| 239 | args.trans = trans; |
| 240 | |
| 241 | ASSERT((dir->i_d.di_mode & S_IFMT) == S_IFDIR); |
| 242 | if ((error = xfs_dir_ino_validate(trans->t_mountp, parent_dir->i_ino))) |
| 243 | return error; |
| 244 | |
| 245 | return(xfs_dir_shortform_create(&args, parent_dir->i_ino)); |
| 246 | } |
| 247 | |
| 248 | /* |
| 249 | * Generic handler routine to add a name to a directory. |
| 250 | * Transitions directory from shortform to Btree as necessary. |
| 251 | */ |
| 252 | static int /* error */ |
| 253 | xfs_dir_createname(xfs_trans_t *trans, xfs_inode_t *dp, char *name, |
| 254 | int namelen, xfs_ino_t inum, xfs_fsblock_t *firstblock, |
| 255 | xfs_bmap_free_t *flist, xfs_extlen_t total) |
| 256 | { |
| 257 | xfs_da_args_t args; |
| 258 | int retval, newsize, done; |
| 259 | |
| 260 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); |
| 261 | |
| 262 | if ((retval = xfs_dir_ino_validate(trans->t_mountp, inum))) |
| 263 | return (retval); |
| 264 | |
| 265 | XFS_STATS_INC(xs_dir_create); |
| 266 | /* |
| 267 | * Fill in the arg structure for this request. |
| 268 | */ |
| 269 | args.name = name; |
| 270 | args.namelen = namelen; |
| 271 | args.hashval = xfs_da_hashname(name, namelen); |
| 272 | args.inumber = inum; |
| 273 | args.dp = dp; |
| 274 | args.firstblock = firstblock; |
| 275 | args.flist = flist; |
| 276 | args.total = total; |
| 277 | args.whichfork = XFS_DATA_FORK; |
| 278 | args.trans = trans; |
| 279 | args.justcheck = 0; |
| 280 | args.addname = args.oknoent = 1; |
| 281 | |
| 282 | /* |
| 283 | * Decide on what work routines to call based on the inode size. |
| 284 | */ |
| 285 | done = 0; |
| 286 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
| 287 | newsize = XFS_DIR_SF_ENTSIZE_BYNAME(args.namelen); |
| 288 | if ((dp->i_d.di_size + newsize) <= XFS_IFORK_DSIZE(dp)) { |
| 289 | retval = xfs_dir_shortform_addname(&args); |
| 290 | done = 1; |
| 291 | } else { |
| 292 | if (total == 0) |
| 293 | return XFS_ERROR(ENOSPC); |
| 294 | retval = xfs_dir_shortform_to_leaf(&args); |
| 295 | done = retval != 0; |
| 296 | } |
| 297 | } |
| 298 | if (!done && xfs_bmap_one_block(dp, XFS_DATA_FORK)) { |
| 299 | retval = xfs_dir_leaf_addname(&args); |
| 300 | done = retval != ENOSPC; |
| 301 | if (!done) { |
| 302 | if (total == 0) |
| 303 | return XFS_ERROR(ENOSPC); |
| 304 | retval = xfs_dir_leaf_to_node(&args); |
| 305 | done = retval != 0; |
| 306 | } |
| 307 | } |
| 308 | if (!done) { |
| 309 | retval = xfs_dir_node_addname(&args); |
| 310 | } |
| 311 | return(retval); |
| 312 | } |
| 313 | |
| 314 | /* |
| 315 | * Generic handler routine to check if a name can be added to a directory, |
| 316 | * without adding any blocks to the directory. |
| 317 | */ |
| 318 | static int /* error */ |
| 319 | xfs_dir_canenter(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen) |
| 320 | { |
| 321 | xfs_da_args_t args; |
| 322 | int retval, newsize; |
| 323 | |
| 324 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); |
| 325 | /* |
| 326 | * Fill in the arg structure for this request. |
| 327 | */ |
| 328 | args.name = name; |
| 329 | args.namelen = namelen; |
| 330 | args.hashval = xfs_da_hashname(name, namelen); |
| 331 | args.inumber = 0; |
| 332 | args.dp = dp; |
| 333 | args.firstblock = NULL; |
| 334 | args.flist = NULL; |
| 335 | args.total = 0; |
| 336 | args.whichfork = XFS_DATA_FORK; |
| 337 | args.trans = trans; |
| 338 | args.justcheck = args.addname = args.oknoent = 1; |
| 339 | |
| 340 | /* |
| 341 | * Decide on what work routines to call based on the inode size. |
| 342 | */ |
| 343 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
| 344 | newsize = XFS_DIR_SF_ENTSIZE_BYNAME(args.namelen); |
| 345 | if ((dp->i_d.di_size + newsize) <= XFS_IFORK_DSIZE(dp)) |
| 346 | retval = 0; |
| 347 | else |
| 348 | retval = XFS_ERROR(ENOSPC); |
| 349 | } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) { |
| 350 | retval = xfs_dir_leaf_addname(&args); |
| 351 | } else { |
| 352 | retval = xfs_dir_node_addname(&args); |
| 353 | } |
| 354 | return(retval); |
| 355 | } |
| 356 | |
| 357 | /* |
| 358 | * Generic handler routine to remove a name from a directory. |
| 359 | * Transitions directory from Btree to shortform as necessary. |
| 360 | */ |
| 361 | static int /* error */ |
| 362 | xfs_dir_removename(xfs_trans_t *trans, xfs_inode_t *dp, char *name, |
| 363 | int namelen, xfs_ino_t ino, xfs_fsblock_t *firstblock, |
| 364 | xfs_bmap_free_t *flist, xfs_extlen_t total) |
| 365 | { |
| 366 | xfs_da_args_t args; |
| 367 | int count, totallen, newsize, retval; |
| 368 | |
| 369 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); |
| 370 | XFS_STATS_INC(xs_dir_remove); |
| 371 | /* |
| 372 | * Fill in the arg structure for this request. |
| 373 | */ |
| 374 | args.name = name; |
| 375 | args.namelen = namelen; |
| 376 | args.hashval = xfs_da_hashname(name, namelen); |
| 377 | args.inumber = ino; |
| 378 | args.dp = dp; |
| 379 | args.firstblock = firstblock; |
| 380 | args.flist = flist; |
| 381 | args.total = total; |
| 382 | args.whichfork = XFS_DATA_FORK; |
| 383 | args.trans = trans; |
| 384 | args.justcheck = args.addname = args.oknoent = 0; |
| 385 | |
| 386 | /* |
| 387 | * Decide on what work routines to call based on the inode size. |
| 388 | */ |
| 389 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
| 390 | retval = xfs_dir_shortform_removename(&args); |
| 391 | } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) { |
| 392 | retval = xfs_dir_leaf_removename(&args, &count, &totallen); |
| 393 | if (retval == 0) { |
| 394 | newsize = XFS_DIR_SF_ALLFIT(count, totallen); |
| 395 | if (newsize <= XFS_IFORK_DSIZE(dp)) { |
| 396 | retval = xfs_dir_leaf_to_shortform(&args); |
| 397 | } |
| 398 | } |
| 399 | } else { |
| 400 | retval = xfs_dir_node_removename(&args); |
| 401 | } |
| 402 | return(retval); |
| 403 | } |
| 404 | |
| 405 | static int /* error */ |
| 406 | xfs_dir_lookup(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen, |
| 407 | xfs_ino_t *inum) |
| 408 | { |
| 409 | xfs_da_args_t args; |
| 410 | int retval; |
| 411 | |
| 412 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); |
| 413 | |
| 414 | XFS_STATS_INC(xs_dir_lookup); |
| 415 | /* |
| 416 | * Fill in the arg structure for this request. |
| 417 | */ |
| 418 | args.name = name; |
| 419 | args.namelen = namelen; |
| 420 | args.hashval = xfs_da_hashname(name, namelen); |
| 421 | args.inumber = 0; |
| 422 | args.dp = dp; |
| 423 | args.firstblock = NULL; |
| 424 | args.flist = NULL; |
| 425 | args.total = 0; |
| 426 | args.whichfork = XFS_DATA_FORK; |
| 427 | args.trans = trans; |
| 428 | args.justcheck = args.addname = 0; |
| 429 | args.oknoent = 1; |
| 430 | |
| 431 | /* |
| 432 | * Decide on what work routines to call based on the inode size. |
| 433 | */ |
| 434 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
| 435 | retval = xfs_dir_shortform_lookup(&args); |
| 436 | } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) { |
| 437 | retval = xfs_dir_leaf_lookup(&args); |
| 438 | } else { |
| 439 | retval = xfs_dir_node_lookup(&args); |
| 440 | } |
| 441 | if (retval == EEXIST) |
| 442 | retval = 0; |
| 443 | *inum = args.inumber; |
| 444 | return(retval); |
| 445 | } |
| 446 | |
| 447 | /* |
| 448 | * Implement readdir. |
| 449 | */ |
| 450 | static int /* error */ |
| 451 | xfs_dir_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio, int *eofp) |
| 452 | { |
| 453 | xfs_dirent_t *dbp; |
| 454 | int alignment, retval; |
| 455 | xfs_dir_put_t put; |
| 456 | |
| 457 | XFS_STATS_INC(xs_dir_getdents); |
| 458 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); |
| 459 | |
| 460 | /* |
| 461 | * If our caller has given us a single contiguous memory buffer, |
| 462 | * just work directly within that buffer. If it's in user memory, |
| 463 | * lock it down first. |
| 464 | */ |
| 465 | alignment = sizeof(xfs_off_t) - 1; |
| 466 | if ((uio->uio_iovcnt == 1) && |
| 467 | (((__psint_t)uio->uio_iov[0].iov_base & alignment) == 0) && |
| 468 | ((uio->uio_iov[0].iov_len & alignment) == 0)) { |
| 469 | dbp = NULL; |
| 470 | put = xfs_dir_put_dirent64_direct; |
| 471 | } else { |
| 472 | dbp = kmem_alloc(sizeof(*dbp) + MAXNAMELEN, KM_SLEEP); |
| 473 | put = xfs_dir_put_dirent64_uio; |
| 474 | } |
| 475 | |
| 476 | /* |
| 477 | * Decide on what work routines to call based on the inode size. |
| 478 | */ |
| 479 | *eofp = 0; |
| 480 | |
| 481 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
| 482 | retval = xfs_dir_shortform_getdents(dp, uio, eofp, dbp, put); |
| 483 | } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) { |
| 484 | retval = xfs_dir_leaf_getdents(trans, dp, uio, eofp, dbp, put); |
| 485 | } else { |
| 486 | retval = xfs_dir_node_getdents(trans, dp, uio, eofp, dbp, put); |
| 487 | } |
| 488 | if (dbp != NULL) |
| 489 | kmem_free(dbp, sizeof(*dbp) + MAXNAMELEN); |
| 490 | |
| 491 | return(retval); |
| 492 | } |
| 493 | |
| 494 | static int /* error */ |
| 495 | xfs_dir_replace(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen, |
| 496 | xfs_ino_t inum, xfs_fsblock_t *firstblock, |
| 497 | xfs_bmap_free_t *flist, xfs_extlen_t total) |
| 498 | { |
| 499 | xfs_da_args_t args; |
| 500 | int retval; |
| 501 | |
| 502 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); |
| 503 | |
| 504 | if ((retval = xfs_dir_ino_validate(trans->t_mountp, inum))) |
| 505 | return retval; |
| 506 | |
| 507 | /* |
| 508 | * Fill in the arg structure for this request. |
| 509 | */ |
| 510 | args.name = name; |
| 511 | args.namelen = namelen; |
| 512 | args.hashval = xfs_da_hashname(name, namelen); |
| 513 | args.inumber = inum; |
| 514 | args.dp = dp; |
| 515 | args.firstblock = firstblock; |
| 516 | args.flist = flist; |
| 517 | args.total = total; |
| 518 | args.whichfork = XFS_DATA_FORK; |
| 519 | args.trans = trans; |
| 520 | args.justcheck = args.addname = args.oknoent = 0; |
| 521 | |
| 522 | /* |
| 523 | * Decide on what work routines to call based on the inode size. |
| 524 | */ |
| 525 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
| 526 | retval = xfs_dir_shortform_replace(&args); |
| 527 | } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) { |
| 528 | retval = xfs_dir_leaf_replace(&args); |
| 529 | } else { |
| 530 | retval = xfs_dir_node_replace(&args); |
| 531 | } |
| 532 | |
| 533 | return(retval); |
| 534 | } |
| 535 | |
| 536 | static int |
| 537 | xfs_dir_shortform_validate_ondisk(xfs_mount_t *mp, xfs_dinode_t *dp) |
| 538 | { |
| 539 | xfs_ino_t ino; |
| 540 | int namelen_sum; |
| 541 | int count; |
| 542 | xfs_dir_shortform_t *sf; |
| 543 | xfs_dir_sf_entry_t *sfe; |
| 544 | int i; |
| 545 | |
| 546 | |
| 547 | |
| 548 | if ((INT_GET(dp->di_core.di_mode, ARCH_CONVERT) & S_IFMT) != S_IFDIR) { |
| 549 | return 0; |
| 550 | } |
| 551 | if (INT_GET(dp->di_core.di_format, ARCH_CONVERT) != XFS_DINODE_FMT_LOCAL) { |
| 552 | return 0; |
| 553 | } |
| 554 | if (INT_GET(dp->di_core.di_size, ARCH_CONVERT) < sizeof(sf->hdr)) { |
| 555 | xfs_fs_cmn_err(CE_WARN, mp, "Invalid shortform size: dp 0x%p", |
| 556 | dp); |
| 557 | return 1; |
| 558 | } |
| 559 | sf = (xfs_dir_shortform_t *)(&dp->di_u.di_dirsf); |
| 560 | ino = XFS_GET_DIR_INO8(sf->hdr.parent); |
| 561 | if (xfs_dir_ino_validate(mp, ino)) |
| 562 | return 1; |
| 563 | |
| 564 | count = sf->hdr.count; |
| 565 | if ((count < 0) || ((count * 10) > XFS_LITINO(mp))) { |
| 566 | xfs_fs_cmn_err(CE_WARN, mp, |
| 567 | "Invalid shortform count: dp 0x%p", dp); |
| 568 | return(1); |
| 569 | } |
| 570 | |
| 571 | if (count == 0) { |
| 572 | return 0; |
| 573 | } |
| 574 | |
| 575 | namelen_sum = 0; |
| 576 | sfe = &sf->list[0]; |
| 577 | for (i = sf->hdr.count - 1; i >= 0; i--) { |
| 578 | ino = XFS_GET_DIR_INO8(sfe->inumber); |
| 579 | xfs_dir_ino_validate(mp, ino); |
| 580 | if (sfe->namelen >= XFS_LITINO(mp)) { |
| 581 | xfs_fs_cmn_err(CE_WARN, mp, |
| 582 | "Invalid shortform namelen: dp 0x%p", dp); |
| 583 | return 1; |
| 584 | } |
| 585 | namelen_sum += sfe->namelen; |
| 586 | sfe = XFS_DIR_SF_NEXTENTRY(sfe); |
| 587 | } |
| 588 | if (namelen_sum >= XFS_LITINO(mp)) { |
| 589 | xfs_fs_cmn_err(CE_WARN, mp, |
| 590 | "Invalid shortform namelen: dp 0x%p", dp); |
| 591 | return 1; |
| 592 | } |
| 593 | |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | /*======================================================================== |
| 598 | * External routines when dirsize == XFS_LBSIZE(dp->i_mount). |
| 599 | *========================================================================*/ |
| 600 | |
| 601 | /* |
| 602 | * Add a name to the leaf directory structure |
| 603 | * This is the external routine. |
| 604 | */ |
| 605 | int |
| 606 | xfs_dir_leaf_addname(xfs_da_args_t *args) |
| 607 | { |
| 608 | int index, retval; |
| 609 | xfs_dabuf_t *bp; |
| 610 | |
| 611 | retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, |
| 612 | XFS_DATA_FORK); |
| 613 | if (retval) |
| 614 | return(retval); |
| 615 | ASSERT(bp != NULL); |
| 616 | |
| 617 | retval = xfs_dir_leaf_lookup_int(bp, args, &index); |
| 618 | if (retval == ENOENT) |
| 619 | retval = xfs_dir_leaf_add(bp, args, index); |
| 620 | xfs_da_buf_done(bp); |
| 621 | return(retval); |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * Remove a name from the leaf directory structure |
| 626 | * This is the external routine. |
| 627 | */ |
| 628 | STATIC int |
| 629 | xfs_dir_leaf_removename(xfs_da_args_t *args, int *count, int *totallen) |
| 630 | { |
| 631 | xfs_dir_leafblock_t *leaf; |
| 632 | int index, retval; |
| 633 | xfs_dabuf_t *bp; |
| 634 | |
| 635 | retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, |
| 636 | XFS_DATA_FORK); |
| 637 | if (retval) |
| 638 | return(retval); |
| 639 | ASSERT(bp != NULL); |
| 640 | leaf = bp->data; |
| 641 | ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT) == XFS_DIR_LEAF_MAGIC); |
| 642 | retval = xfs_dir_leaf_lookup_int(bp, args, &index); |
| 643 | if (retval == EEXIST) { |
| 644 | (void)xfs_dir_leaf_remove(args->trans, bp, index); |
| 645 | *count = INT_GET(leaf->hdr.count, ARCH_CONVERT); |
| 646 | *totallen = INT_GET(leaf->hdr.namebytes, ARCH_CONVERT); |
| 647 | retval = 0; |
| 648 | } |
| 649 | xfs_da_buf_done(bp); |
| 650 | return(retval); |
| 651 | } |
| 652 | |
| 653 | /* |
| 654 | * Look up a name in a leaf directory structure. |
| 655 | * This is the external routine. |
| 656 | */ |
| 657 | STATIC int |
| 658 | xfs_dir_leaf_lookup(xfs_da_args_t *args) |
| 659 | { |
| 660 | int index, retval; |
| 661 | xfs_dabuf_t *bp; |
| 662 | |
| 663 | retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, |
| 664 | XFS_DATA_FORK); |
| 665 | if (retval) |
| 666 | return(retval); |
| 667 | ASSERT(bp != NULL); |
| 668 | retval = xfs_dir_leaf_lookup_int(bp, args, &index); |
| 669 | xfs_da_brelse(args->trans, bp); |
| 670 | return(retval); |
| 671 | } |
| 672 | |
| 673 | /* |
| 674 | * Copy out directory entries for getdents(), for leaf directories. |
| 675 | */ |
| 676 | STATIC int |
| 677 | xfs_dir_leaf_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio, |
| 678 | int *eofp, xfs_dirent_t *dbp, xfs_dir_put_t put) |
| 679 | { |
| 680 | xfs_dabuf_t *bp; |
| 681 | int retval, eob; |
| 682 | |
| 683 | retval = xfs_da_read_buf(dp->i_transp, dp, 0, -1, &bp, XFS_DATA_FORK); |
| 684 | if (retval) |
| 685 | return(retval); |
| 686 | ASSERT(bp != NULL); |
| 687 | retval = xfs_dir_leaf_getdents_int(bp, dp, 0, uio, &eob, dbp, put, -1); |
| 688 | xfs_da_brelse(trans, bp); |
| 689 | *eofp = (eob == 0); |
| 690 | return(retval); |
| 691 | } |
| 692 | |
| 693 | /* |
| 694 | * Look up a name in a leaf directory structure, replace the inode number. |
| 695 | * This is the external routine. |
| 696 | */ |
| 697 | STATIC int |
| 698 | xfs_dir_leaf_replace(xfs_da_args_t *args) |
| 699 | { |
| 700 | int index, retval; |
| 701 | xfs_dabuf_t *bp; |
| 702 | xfs_ino_t inum; |
| 703 | xfs_dir_leafblock_t *leaf; |
| 704 | xfs_dir_leaf_entry_t *entry; |
| 705 | xfs_dir_leaf_name_t *namest; |
| 706 | |
| 707 | inum = args->inumber; |
| 708 | retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, |
| 709 | XFS_DATA_FORK); |
| 710 | if (retval) |
| 711 | return(retval); |
| 712 | ASSERT(bp != NULL); |
| 713 | retval = xfs_dir_leaf_lookup_int(bp, args, &index); |
| 714 | if (retval == EEXIST) { |
| 715 | leaf = bp->data; |
| 716 | entry = &leaf->entries[index]; |
| 717 | namest = XFS_DIR_LEAF_NAMESTRUCT(leaf, INT_GET(entry->nameidx, ARCH_CONVERT)); |
| 718 | /* XXX - replace assert? */ |
| 719 | XFS_DIR_SF_PUT_DIRINO(&inum, &namest->inumber); |
| 720 | xfs_da_log_buf(args->trans, bp, |
| 721 | XFS_DA_LOGRANGE(leaf, namest, sizeof(namest->inumber))); |
| 722 | xfs_da_buf_done(bp); |
| 723 | retval = 0; |
| 724 | } else |
| 725 | xfs_da_brelse(args->trans, bp); |
| 726 | return(retval); |
| 727 | } |
| 728 | |
| 729 | |
| 730 | /*======================================================================== |
| 731 | * External routines when dirsize > XFS_LBSIZE(mp). |
| 732 | *========================================================================*/ |
| 733 | |
| 734 | /* |
| 735 | * Add a name to a Btree-format directory. |
| 736 | * |
| 737 | * This will involve walking down the Btree, and may involve splitting |
| 738 | * leaf nodes and even splitting intermediate nodes up to and including |
| 739 | * the root node (a special case of an intermediate node). |
| 740 | */ |
| 741 | STATIC int |
| 742 | xfs_dir_node_addname(xfs_da_args_t *args) |
| 743 | { |
| 744 | xfs_da_state_t *state; |
| 745 | xfs_da_state_blk_t *blk; |
| 746 | int retval, error; |
| 747 | |
| 748 | /* |
| 749 | * Fill in bucket of arguments/results/context to carry around. |
| 750 | */ |
| 751 | state = xfs_da_state_alloc(); |
| 752 | state->args = args; |
| 753 | state->mp = args->dp->i_mount; |
| 754 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 755 | state->node_ents = state->mp->m_dir_node_ents; |
| 756 | |
| 757 | /* |
| 758 | * Search to see if name already exists, and get back a pointer |
| 759 | * to where it should go. |
| 760 | */ |
| 761 | error = xfs_da_node_lookup_int(state, &retval); |
| 762 | if (error) |
| 763 | retval = error; |
| 764 | if (retval != ENOENT) |
| 765 | goto error; |
| 766 | blk = &state->path.blk[ state->path.active-1 ]; |
| 767 | ASSERT(blk->magic == XFS_DIR_LEAF_MAGIC); |
| 768 | retval = xfs_dir_leaf_add(blk->bp, args, blk->index); |
| 769 | if (retval == 0) { |
| 770 | /* |
| 771 | * Addition succeeded, update Btree hashvals. |
| 772 | */ |
| 773 | if (!args->justcheck) |
| 774 | xfs_da_fixhashpath(state, &state->path); |
| 775 | } else { |
| 776 | /* |
| 777 | * Addition failed, split as many Btree elements as required. |
| 778 | */ |
| 779 | if (args->total == 0) { |
| 780 | ASSERT(retval == ENOSPC); |
| 781 | goto error; |
| 782 | } |
| 783 | retval = xfs_da_split(state); |
| 784 | } |
| 785 | error: |
| 786 | xfs_da_state_free(state); |
| 787 | |
| 788 | return(retval); |
| 789 | } |
| 790 | |
| 791 | /* |
| 792 | * Remove a name from a B-tree directory. |
| 793 | * |
| 794 | * This will involve walking down the Btree, and may involve joining |
| 795 | * leaf nodes and even joining intermediate nodes up to and including |
| 796 | * the root node (a special case of an intermediate node). |
| 797 | */ |
| 798 | STATIC int |
| 799 | xfs_dir_node_removename(xfs_da_args_t *args) |
| 800 | { |
| 801 | xfs_da_state_t *state; |
| 802 | xfs_da_state_blk_t *blk; |
| 803 | int retval, error; |
| 804 | |
| 805 | state = xfs_da_state_alloc(); |
| 806 | state->args = args; |
| 807 | state->mp = args->dp->i_mount; |
| 808 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 809 | state->node_ents = state->mp->m_dir_node_ents; |
| 810 | |
| 811 | /* |
| 812 | * Search to see if name exists, and get back a pointer to it. |
| 813 | */ |
| 814 | error = xfs_da_node_lookup_int(state, &retval); |
| 815 | if (error) |
| 816 | retval = error; |
| 817 | if (retval != EEXIST) { |
| 818 | xfs_da_state_free(state); |
| 819 | return(retval); |
| 820 | } |
| 821 | |
| 822 | /* |
| 823 | * Remove the name and update the hashvals in the tree. |
| 824 | */ |
| 825 | blk = &state->path.blk[ state->path.active-1 ]; |
| 826 | ASSERT(blk->magic == XFS_DIR_LEAF_MAGIC); |
| 827 | retval = xfs_dir_leaf_remove(args->trans, blk->bp, blk->index); |
| 828 | xfs_da_fixhashpath(state, &state->path); |
| 829 | |
| 830 | /* |
| 831 | * Check to see if the tree needs to be collapsed. |
| 832 | */ |
| 833 | error = 0; |
| 834 | if (retval) { |
| 835 | error = xfs_da_join(state); |
| 836 | } |
| 837 | |
| 838 | xfs_da_state_free(state); |
| 839 | if (error) |
| 840 | return(error); |
| 841 | return(0); |
| 842 | } |
| 843 | |
| 844 | /* |
| 845 | * Look up a filename in a int directory. |
| 846 | * Use an internal routine to actually do all the work. |
| 847 | */ |
| 848 | STATIC int |
| 849 | xfs_dir_node_lookup(xfs_da_args_t *args) |
| 850 | { |
| 851 | xfs_da_state_t *state; |
| 852 | int retval, error, i; |
| 853 | |
| 854 | state = xfs_da_state_alloc(); |
| 855 | state->args = args; |
| 856 | state->mp = args->dp->i_mount; |
| 857 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 858 | state->node_ents = state->mp->m_dir_node_ents; |
| 859 | |
| 860 | /* |
| 861 | * Search to see if name exists, |
| 862 | * and get back a pointer to it. |
| 863 | */ |
| 864 | error = xfs_da_node_lookup_int(state, &retval); |
| 865 | if (error) { |
| 866 | retval = error; |
| 867 | } |
| 868 | |
| 869 | /* |
| 870 | * If not in a transaction, we have to release all the buffers. |
| 871 | */ |
| 872 | for (i = 0; i < state->path.active; i++) { |
| 873 | xfs_da_brelse(args->trans, state->path.blk[i].bp); |
| 874 | state->path.blk[i].bp = NULL; |
| 875 | } |
| 876 | |
| 877 | xfs_da_state_free(state); |
| 878 | return(retval); |
| 879 | } |
| 880 | |
| 881 | STATIC int |
| 882 | xfs_dir_node_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio, |
| 883 | int *eofp, xfs_dirent_t *dbp, xfs_dir_put_t put) |
| 884 | { |
| 885 | xfs_da_intnode_t *node; |
| 886 | xfs_da_node_entry_t *btree; |
| 887 | xfs_dir_leafblock_t *leaf = NULL; |
| 888 | xfs_dablk_t bno, nextbno; |
| 889 | xfs_dahash_t cookhash; |
| 890 | xfs_mount_t *mp; |
| 891 | int error, eob, i; |
| 892 | xfs_dabuf_t *bp; |
| 893 | xfs_daddr_t nextda; |
| 894 | |
| 895 | /* |
| 896 | * Pick up our context. |
| 897 | */ |
| 898 | mp = dp->i_mount; |
| 899 | bp = NULL; |
| 900 | bno = XFS_DA_COOKIE_BNO(mp, uio->uio_offset); |
| 901 | cookhash = XFS_DA_COOKIE_HASH(mp, uio->uio_offset); |
| 902 | |
| 903 | xfs_dir_trace_g_du("node: start", dp, uio); |
| 904 | |
| 905 | /* |
| 906 | * Re-find our place, even if we're confused about what our place is. |
| 907 | * |
| 908 | * First we check the block number from the magic cookie, it is a |
| 909 | * cache of where we ended last time. If we find a leaf block, and |
| 910 | * the starting hashval in that block is less than our desired |
| 911 | * hashval, then we run with it. |
| 912 | */ |
| 913 | if (bno > 0) { |
| 914 | error = xfs_da_read_buf(trans, dp, bno, -2, &bp, XFS_DATA_FORK); |
| 915 | if ((error != 0) && (error != EFSCORRUPTED)) |
| 916 | return(error); |
| 917 | if (bp) |
| 918 | leaf = bp->data; |
| 919 | if (bp && INT_GET(leaf->hdr.info.magic, ARCH_CONVERT) != XFS_DIR_LEAF_MAGIC) { |
| 920 | xfs_dir_trace_g_dub("node: block not a leaf", |
| 921 | dp, uio, bno); |
| 922 | xfs_da_brelse(trans, bp); |
| 923 | bp = NULL; |
| 924 | } |
| 925 | if (bp && INT_GET(leaf->entries[0].hashval, ARCH_CONVERT) > cookhash) { |
| 926 | xfs_dir_trace_g_dub("node: leaf hash too large", |
| 927 | dp, uio, bno); |
| 928 | xfs_da_brelse(trans, bp); |
| 929 | bp = NULL; |
| 930 | } |
| 931 | if (bp && |
| 932 | cookhash > INT_GET(leaf->entries[INT_GET(leaf->hdr.count, ARCH_CONVERT) - 1].hashval, ARCH_CONVERT)) { |
| 933 | xfs_dir_trace_g_dub("node: leaf hash too small", |
| 934 | dp, uio, bno); |
| 935 | xfs_da_brelse(trans, bp); |
| 936 | bp = NULL; |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | /* |
| 941 | * If we did not find a leaf block from the blockno in the cookie, |
| 942 | * or we there was no blockno in the cookie (eg: first time thru), |
| 943 | * the we start at the top of the Btree and re-find our hashval. |
| 944 | */ |
| 945 | if (bp == NULL) { |
| 946 | xfs_dir_trace_g_du("node: start at root" , dp, uio); |
| 947 | bno = 0; |
| 948 | for (;;) { |
| 949 | error = xfs_da_read_buf(trans, dp, bno, -1, &bp, |
| 950 | XFS_DATA_FORK); |
| 951 | if (error) |
| 952 | return(error); |
| 953 | if (bp == NULL) |
| 954 | return(XFS_ERROR(EFSCORRUPTED)); |
| 955 | node = bp->data; |
| 956 | if (INT_GET(node->hdr.info.magic, ARCH_CONVERT) != XFS_DA_NODE_MAGIC) |
| 957 | break; |
| 958 | btree = &node->btree[0]; |
| 959 | xfs_dir_trace_g_dun("node: node detail", dp, uio, node); |
| 960 | for (i = 0; i < INT_GET(node->hdr.count, ARCH_CONVERT); btree++, i++) { |
| 961 | if (INT_GET(btree->hashval, ARCH_CONVERT) >= cookhash) { |
| 962 | bno = INT_GET(btree->before, ARCH_CONVERT); |
| 963 | break; |
| 964 | } |
| 965 | } |
| 966 | if (i == INT_GET(node->hdr.count, ARCH_CONVERT)) { |
| 967 | xfs_da_brelse(trans, bp); |
| 968 | xfs_dir_trace_g_du("node: hash beyond EOF", |
| 969 | dp, uio); |
| 970 | uio->uio_offset = XFS_DA_MAKE_COOKIE(mp, 0, 0, |
| 971 | XFS_DA_MAXHASH); |
| 972 | *eofp = 1; |
| 973 | return(0); |
| 974 | } |
| 975 | xfs_dir_trace_g_dub("node: going to block", |
| 976 | dp, uio, bno); |
| 977 | xfs_da_brelse(trans, bp); |
| 978 | } |
| 979 | } |
| 980 | ASSERT(cookhash != XFS_DA_MAXHASH); |
| 981 | |
| 982 | /* |
| 983 | * We've dropped down to the (first) leaf block that contains the |
| 984 | * hashval we are interested in. Continue rolling upward thru the |
| 985 | * leaf blocks until we fill up our buffer. |
| 986 | */ |
| 987 | for (;;) { |
| 988 | leaf = bp->data; |
| 989 | if (unlikely(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT) != XFS_DIR_LEAF_MAGIC)) { |
| 990 | xfs_dir_trace_g_dul("node: not a leaf", dp, uio, leaf); |
| 991 | xfs_da_brelse(trans, bp); |
| 992 | XFS_CORRUPTION_ERROR("xfs_dir_node_getdents(1)", |
| 993 | XFS_ERRLEVEL_LOW, mp, leaf); |
| 994 | return XFS_ERROR(EFSCORRUPTED); |
| 995 | } |
| 996 | xfs_dir_trace_g_dul("node: leaf detail", dp, uio, leaf); |
| 997 | if ((nextbno = INT_GET(leaf->hdr.info.forw, ARCH_CONVERT))) { |
| 998 | nextda = xfs_da_reada_buf(trans, dp, nextbno, |
| 999 | XFS_DATA_FORK); |
| 1000 | } else |
| 1001 | nextda = -1; |
| 1002 | error = xfs_dir_leaf_getdents_int(bp, dp, bno, uio, &eob, dbp, |
| 1003 | put, nextda); |
| 1004 | xfs_da_brelse(trans, bp); |
| 1005 | bno = nextbno; |
| 1006 | if (eob) { |
| 1007 | xfs_dir_trace_g_dub("node: E-O-B", dp, uio, bno); |
| 1008 | *eofp = 0; |
| 1009 | return(error); |
| 1010 | } |
| 1011 | if (bno == 0) |
| 1012 | break; |
| 1013 | error = xfs_da_read_buf(trans, dp, bno, nextda, &bp, |
| 1014 | XFS_DATA_FORK); |
| 1015 | if (error) |
| 1016 | return(error); |
| 1017 | if (unlikely(bp == NULL)) { |
| 1018 | XFS_ERROR_REPORT("xfs_dir_node_getdents(2)", |
| 1019 | XFS_ERRLEVEL_LOW, mp); |
| 1020 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1021 | } |
| 1022 | } |
| 1023 | *eofp = 1; |
| 1024 | xfs_dir_trace_g_du("node: E-O-F", dp, uio); |
| 1025 | return(0); |
| 1026 | } |
| 1027 | |
| 1028 | /* |
| 1029 | * Look up a filename in an int directory, replace the inode number. |
| 1030 | * Use an internal routine to actually do the lookup. |
| 1031 | */ |
| 1032 | STATIC int |
| 1033 | xfs_dir_node_replace(xfs_da_args_t *args) |
| 1034 | { |
| 1035 | xfs_da_state_t *state; |
| 1036 | xfs_da_state_blk_t *blk; |
| 1037 | xfs_dir_leafblock_t *leaf; |
| 1038 | xfs_dir_leaf_entry_t *entry; |
| 1039 | xfs_dir_leaf_name_t *namest; |
| 1040 | xfs_ino_t inum; |
| 1041 | int retval, error, i; |
| 1042 | xfs_dabuf_t *bp; |
| 1043 | |
| 1044 | state = xfs_da_state_alloc(); |
| 1045 | state->args = args; |
| 1046 | state->mp = args->dp->i_mount; |
| 1047 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1048 | state->node_ents = state->mp->m_dir_node_ents; |
| 1049 | inum = args->inumber; |
| 1050 | |
| 1051 | /* |
| 1052 | * Search to see if name exists, |
| 1053 | * and get back a pointer to it. |
| 1054 | */ |
| 1055 | error = xfs_da_node_lookup_int(state, &retval); |
| 1056 | if (error) { |
| 1057 | retval = error; |
| 1058 | } |
| 1059 | |
| 1060 | if (retval == EEXIST) { |
| 1061 | blk = &state->path.blk[state->path.active - 1]; |
| 1062 | ASSERT(blk->magic == XFS_DIR_LEAF_MAGIC); |
| 1063 | bp = blk->bp; |
| 1064 | leaf = bp->data; |
| 1065 | entry = &leaf->entries[blk->index]; |
| 1066 | namest = XFS_DIR_LEAF_NAMESTRUCT(leaf, INT_GET(entry->nameidx, ARCH_CONVERT)); |
| 1067 | /* XXX - replace assert ? */ |
| 1068 | XFS_DIR_SF_PUT_DIRINO(&inum, &namest->inumber); |
| 1069 | xfs_da_log_buf(args->trans, bp, |
| 1070 | XFS_DA_LOGRANGE(leaf, namest, sizeof(namest->inumber))); |
| 1071 | xfs_da_buf_done(bp); |
| 1072 | blk->bp = NULL; |
| 1073 | retval = 0; |
| 1074 | } else { |
| 1075 | i = state->path.active - 1; |
| 1076 | xfs_da_brelse(args->trans, state->path.blk[i].bp); |
| 1077 | state->path.blk[i].bp = NULL; |
| 1078 | } |
| 1079 | for (i = 0; i < state->path.active - 1; i++) { |
| 1080 | xfs_da_brelse(args->trans, state->path.blk[i].bp); |
| 1081 | state->path.blk[i].bp = NULL; |
| 1082 | } |
| 1083 | |
| 1084 | xfs_da_state_free(state); |
| 1085 | return(retval); |
| 1086 | } |
| 1087 | |
| 1088 | #if defined(XFS_DIR_TRACE) |
| 1089 | /* |
| 1090 | * Add a trace buffer entry for an inode and a uio. |
| 1091 | */ |
| 1092 | void |
| 1093 | xfs_dir_trace_g_du(char *where, xfs_inode_t *dp, uio_t *uio) |
| 1094 | { |
| 1095 | xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DU, where, |
| 1096 | (void *)dp, (void *)dp->i_mount, |
| 1097 | (void *)((unsigned long)(uio->uio_offset >> 32)), |
| 1098 | (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), |
| 1099 | (void *)(unsigned long)uio->uio_resid, |
| 1100 | NULL, NULL, NULL, NULL, NULL, NULL, NULL); |
| 1101 | } |
| 1102 | |
| 1103 | /* |
| 1104 | * Add a trace buffer entry for an inode and a uio. |
| 1105 | */ |
| 1106 | void |
| 1107 | xfs_dir_trace_g_dub(char *where, xfs_inode_t *dp, uio_t *uio, xfs_dablk_t bno) |
| 1108 | { |
| 1109 | xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUB, where, |
| 1110 | (void *)dp, (void *)dp->i_mount, |
| 1111 | (void *)((unsigned long)(uio->uio_offset >> 32)), |
| 1112 | (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), |
| 1113 | (void *)(unsigned long)uio->uio_resid, |
| 1114 | (void *)(unsigned long)bno, |
| 1115 | NULL, NULL, NULL, NULL, NULL, NULL); |
| 1116 | } |
| 1117 | |
| 1118 | /* |
| 1119 | * Add a trace buffer entry for an inode and a uio. |
| 1120 | */ |
| 1121 | void |
| 1122 | xfs_dir_trace_g_dun(char *where, xfs_inode_t *dp, uio_t *uio, |
| 1123 | xfs_da_intnode_t *node) |
| 1124 | { |
| 1125 | int last = INT_GET(node->hdr.count, ARCH_CONVERT) - 1; |
| 1126 | |
| 1127 | xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUN, where, |
| 1128 | (void *)dp, (void *)dp->i_mount, |
| 1129 | (void *)((unsigned long)(uio->uio_offset >> 32)), |
| 1130 | (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), |
| 1131 | (void *)(unsigned long)uio->uio_resid, |
| 1132 | (void *)(unsigned long) |
| 1133 | INT_GET(node->hdr.info.forw, ARCH_CONVERT), |
| 1134 | (void *)(unsigned long) |
| 1135 | INT_GET(node->hdr.count, ARCH_CONVERT), |
| 1136 | (void *)(unsigned long) |
| 1137 | INT_GET(node->btree[0].hashval, ARCH_CONVERT), |
| 1138 | (void *)(unsigned long) |
| 1139 | INT_GET(node->btree[last].hashval, ARCH_CONVERT), |
| 1140 | NULL, NULL, NULL); |
| 1141 | } |
| 1142 | |
| 1143 | /* |
| 1144 | * Add a trace buffer entry for an inode and a uio. |
| 1145 | */ |
| 1146 | void |
| 1147 | xfs_dir_trace_g_dul(char *where, xfs_inode_t *dp, uio_t *uio, |
| 1148 | xfs_dir_leafblock_t *leaf) |
| 1149 | { |
| 1150 | int last = INT_GET(leaf->hdr.count, ARCH_CONVERT) - 1; |
| 1151 | |
| 1152 | xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUL, where, |
| 1153 | (void *)dp, (void *)dp->i_mount, |
| 1154 | (void *)((unsigned long)(uio->uio_offset >> 32)), |
| 1155 | (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), |
| 1156 | (void *)(unsigned long)uio->uio_resid, |
| 1157 | (void *)(unsigned long) |
| 1158 | INT_GET(leaf->hdr.info.forw, ARCH_CONVERT), |
| 1159 | (void *)(unsigned long) |
| 1160 | INT_GET(leaf->hdr.count, ARCH_CONVERT), |
| 1161 | (void *)(unsigned long) |
| 1162 | INT_GET(leaf->entries[0].hashval, ARCH_CONVERT), |
| 1163 | (void *)(unsigned long) |
| 1164 | INT_GET(leaf->entries[last].hashval, ARCH_CONVERT), |
| 1165 | NULL, NULL, NULL); |
| 1166 | } |
| 1167 | |
| 1168 | /* |
| 1169 | * Add a trace buffer entry for an inode and a uio. |
| 1170 | */ |
| 1171 | void |
| 1172 | xfs_dir_trace_g_due(char *where, xfs_inode_t *dp, uio_t *uio, |
| 1173 | xfs_dir_leaf_entry_t *entry) |
| 1174 | { |
| 1175 | xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUE, where, |
| 1176 | (void *)dp, (void *)dp->i_mount, |
| 1177 | (void *)((unsigned long)(uio->uio_offset >> 32)), |
| 1178 | (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), |
| 1179 | (void *)(unsigned long)uio->uio_resid, |
| 1180 | (void *)(unsigned long) |
| 1181 | INT_GET(entry->hashval, ARCH_CONVERT), |
| 1182 | NULL, NULL, NULL, NULL, NULL, NULL); |
| 1183 | } |
| 1184 | |
| 1185 | /* |
| 1186 | * Add a trace buffer entry for an inode and a uio. |
| 1187 | */ |
| 1188 | void |
| 1189 | xfs_dir_trace_g_duc(char *where, xfs_inode_t *dp, uio_t *uio, xfs_off_t cookie) |
| 1190 | { |
| 1191 | xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUC, where, |
| 1192 | (void *)dp, (void *)dp->i_mount, |
| 1193 | (void *)((unsigned long)(uio->uio_offset >> 32)), |
| 1194 | (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), |
| 1195 | (void *)(unsigned long)uio->uio_resid, |
| 1196 | (void *)((unsigned long)(cookie >> 32)), |
| 1197 | (void *)((unsigned long)(cookie & 0xFFFFFFFF)), |
| 1198 | NULL, NULL, NULL, NULL, NULL); |
| 1199 | } |
| 1200 | |
| 1201 | /* |
| 1202 | * Add a trace buffer entry for the arguments given to the routine, |
| 1203 | * generic form. |
| 1204 | */ |
| 1205 | void |
| 1206 | xfs_dir_trace_enter(int type, char *where, |
| 1207 | void * a0, void * a1, |
| 1208 | void * a2, void * a3, |
| 1209 | void * a4, void * a5, |
| 1210 | void * a6, void * a7, |
| 1211 | void * a8, void * a9, |
| 1212 | void * a10, void * a11) |
| 1213 | { |
| 1214 | ASSERT(xfs_dir_trace_buf); |
| 1215 | ktrace_enter(xfs_dir_trace_buf, (void *)(unsigned long)type, |
| 1216 | (void *)where, |
| 1217 | (void *)a0, (void *)a1, (void *)a2, |
| 1218 | (void *)a3, (void *)a4, (void *)a5, |
| 1219 | (void *)a6, (void *)a7, (void *)a8, |
| 1220 | (void *)a9, (void *)a10, (void *)a11, |
| 1221 | NULL, NULL); |
| 1222 | } |
| 1223 | #endif /* XFS_DIR_TRACE */ |