1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 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 version 2. 8 */ 9 10 #include <linux/slab.h> 11 #include <linux/spinlock.h> 12 #include <linux/completion.h> 13 #include <linux/buffer_head.h> 14 #include <linux/namei.h> 15 #include <linux/mm.h> 16 #include <linux/xattr.h> 17 #include <linux/posix_acl.h> 18 #include <linux/gfs2_ondisk.h> 19 #include <linux/crc32.h> 20 #include <linux/fiemap.h> 21 #include <linux/security.h> 22 #include <asm/uaccess.h> 23 24 #include "gfs2.h" 25 #include "incore.h" 26 #include "acl.h" 27 #include "bmap.h" 28 #include "dir.h" 29 #include "xattr.h" 30 #include "glock.h" 31 #include "inode.h" 32 #include "meta_io.h" 33 #include "quota.h" 34 #include "rgrp.h" 35 #include "trans.h" 36 #include "util.h" 37 #include "super.h" 38 #include "glops.h" 39 40 struct gfs2_skip_data { 41 u64 no_addr; 42 int skipped; 43 int non_block; 44 }; 45 46 static int iget_test(struct inode *inode, void *opaque) 47 { 48 struct gfs2_inode *ip = GFS2_I(inode); 49 struct gfs2_skip_data *data = opaque; 50 51 if (ip->i_no_addr == data->no_addr) { 52 if (data->non_block && 53 inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) { 54 data->skipped = 1; 55 return 0; 56 } 57 return 1; 58 } 59 return 0; 60 } 61 62 static int iget_set(struct inode *inode, void *opaque) 63 { 64 struct gfs2_inode *ip = GFS2_I(inode); 65 struct gfs2_skip_data *data = opaque; 66 67 if (data->skipped) 68 return -ENOENT; 69 inode->i_ino = (unsigned long)(data->no_addr); 70 ip->i_no_addr = data->no_addr; 71 return 0; 72 } 73 74 struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block) 75 { 76 unsigned long hash = (unsigned long)no_addr; 77 struct gfs2_skip_data data; 78 79 data.no_addr = no_addr; 80 data.skipped = 0; 81 data.non_block = non_block; 82 return ilookup5(sb, hash, iget_test, &data); 83 } 84 85 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr, 86 int non_block) 87 { 88 struct gfs2_skip_data data; 89 unsigned long hash = (unsigned long)no_addr; 90 91 data.no_addr = no_addr; 92 data.skipped = 0; 93 data.non_block = non_block; 94 return iget5_locked(sb, hash, iget_test, iget_set, &data); 95 } 96 97 /** 98 * gfs2_set_iop - Sets inode operations 99 * @inode: The inode with correct i_mode filled in 100 * 101 * GFS2 lookup code fills in vfs inode contents based on info obtained 102 * from directory entry inside gfs2_inode_lookup(). 103 */ 104 105 static void gfs2_set_iop(struct inode *inode) 106 { 107 struct gfs2_sbd *sdp = GFS2_SB(inode); 108 umode_t mode = inode->i_mode; 109 110 if (S_ISREG(mode)) { 111 inode->i_op = &gfs2_file_iops; 112 if (gfs2_localflocks(sdp)) 113 inode->i_fop = &gfs2_file_fops_nolock; 114 else 115 inode->i_fop = &gfs2_file_fops; 116 } else if (S_ISDIR(mode)) { 117 inode->i_op = &gfs2_dir_iops; 118 if (gfs2_localflocks(sdp)) 119 inode->i_fop = &gfs2_dir_fops_nolock; 120 else 121 inode->i_fop = &gfs2_dir_fops; 122 } else if (S_ISLNK(mode)) { 123 inode->i_op = &gfs2_symlink_iops; 124 } else { 125 inode->i_op = &gfs2_file_iops; 126 init_special_inode(inode, inode->i_mode, inode->i_rdev); 127 } 128 } 129 130 /** 131 * gfs2_inode_lookup - Lookup an inode 132 * @sb: The super block 133 * @no_addr: The inode number 134 * @type: The type of the inode 135 * non_block: Can we block on inodes that are being freed? 136 * 137 * Returns: A VFS inode, or an error 138 */ 139 140 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 141 u64 no_addr, u64 no_formal_ino, int non_block) 142 { 143 struct inode *inode; 144 struct gfs2_inode *ip; 145 struct gfs2_glock *io_gl = NULL; 146 int error; 147 148 inode = gfs2_iget(sb, no_addr, non_block); 149 ip = GFS2_I(inode); 150 151 if (!inode) 152 return ERR_PTR(-ENOMEM); 153 154 if (inode->i_state & I_NEW) { 155 struct gfs2_sbd *sdp = GFS2_SB(inode); 156 ip->i_no_formal_ino = no_formal_ino; 157 158 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 159 if (unlikely(error)) 160 goto fail; 161 ip->i_gl->gl_object = ip; 162 163 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 164 if (unlikely(error)) 165 goto fail_put; 166 167 set_bit(GIF_INVALID, &ip->i_flags); 168 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 169 if (unlikely(error)) 170 goto fail_iopen; 171 172 ip->i_iopen_gh.gh_gl->gl_object = ip; 173 gfs2_glock_put(io_gl); 174 io_gl = NULL; 175 176 if (type == DT_UNKNOWN) { 177 /* Inode glock must be locked already */ 178 error = gfs2_inode_refresh(GFS2_I(inode)); 179 if (error) 180 goto fail_refresh; 181 } else { 182 inode->i_mode = DT2IF(type); 183 } 184 185 gfs2_set_iop(inode); 186 unlock_new_inode(inode); 187 } 188 189 return inode; 190 191 fail_refresh: 192 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 193 ip->i_iopen_gh.gh_gl->gl_object = NULL; 194 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 195 fail_iopen: 196 if (io_gl) 197 gfs2_glock_put(io_gl); 198 fail_put: 199 ip->i_gl->gl_object = NULL; 200 gfs2_glock_put(ip->i_gl); 201 fail: 202 iget_failed(inode); 203 return ERR_PTR(error); 204 } 205 206 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 207 u64 *no_formal_ino, unsigned int blktype) 208 { 209 struct super_block *sb = sdp->sd_vfs; 210 struct gfs2_holder i_gh; 211 struct inode *inode = NULL; 212 int error; 213 214 /* Must not read in block until block type is verified */ 215 error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops, 216 LM_ST_EXCLUSIVE, GL_SKIP, &i_gh); 217 if (error) 218 return ERR_PTR(error); 219 220 error = gfs2_check_blk_type(sdp, no_addr, blktype); 221 if (error) 222 goto fail; 223 224 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1); 225 if (IS_ERR(inode)) 226 goto fail; 227 228 /* Two extra checks for NFS only */ 229 if (no_formal_ino) { 230 error = -ESTALE; 231 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) 232 goto fail_iput; 233 234 error = -EIO; 235 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 236 goto fail_iput; 237 238 error = 0; 239 } 240 241 fail: 242 gfs2_glock_dq_uninit(&i_gh); 243 return error ? ERR_PTR(error) : inode; 244 fail_iput: 245 iput(inode); 246 goto fail; 247 } 248 249 250 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 251 { 252 struct qstr qstr; 253 struct inode *inode; 254 gfs2_str2qstr(&qstr, name); 255 inode = gfs2_lookupi(dip, &qstr, 1); 256 /* gfs2_lookupi has inconsistent callers: vfs 257 * related routines expect NULL for no entry found, 258 * gfs2_lookup_simple callers expect ENOENT 259 * and do not check for NULL. 260 */ 261 if (inode == NULL) 262 return ERR_PTR(-ENOENT); 263 else 264 return inode; 265 } 266 267 268 /** 269 * gfs2_lookupi - Look up a filename in a directory and return its inode 270 * @d_gh: An initialized holder for the directory glock 271 * @name: The name of the inode to look for 272 * @is_root: If 1, ignore the caller's permissions 273 * @i_gh: An uninitialized holder for the new inode glock 274 * 275 * This can be called via the VFS filldir function when NFS is doing 276 * a readdirplus and the inode which its intending to stat isn't 277 * already in cache. In this case we must not take the directory glock 278 * again, since the readdir call will have already taken that lock. 279 * 280 * Returns: errno 281 */ 282 283 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 284 int is_root) 285 { 286 struct super_block *sb = dir->i_sb; 287 struct gfs2_inode *dip = GFS2_I(dir); 288 struct gfs2_holder d_gh; 289 int error = 0; 290 struct inode *inode = NULL; 291 int unlock = 0; 292 293 if (!name->len || name->len > GFS2_FNAMESIZE) 294 return ERR_PTR(-ENAMETOOLONG); 295 296 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 297 (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 298 dir == d_inode(sb->s_root))) { 299 igrab(dir); 300 return dir; 301 } 302 303 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 304 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 305 if (error) 306 return ERR_PTR(error); 307 unlock = 1; 308 } 309 310 if (!is_root) { 311 error = gfs2_permission(dir, MAY_EXEC); 312 if (error) 313 goto out; 314 } 315 316 inode = gfs2_dir_search(dir, name, false); 317 if (IS_ERR(inode)) 318 error = PTR_ERR(inode); 319 out: 320 if (unlock) 321 gfs2_glock_dq_uninit(&d_gh); 322 if (error == -ENOENT) 323 return NULL; 324 return inode ? inode : ERR_PTR(error); 325 } 326 327 /** 328 * create_ok - OK to create a new on-disk inode here? 329 * @dip: Directory in which dinode is to be created 330 * @name: Name of new dinode 331 * @mode: 332 * 333 * Returns: errno 334 */ 335 336 static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 337 umode_t mode) 338 { 339 int error; 340 341 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 342 if (error) 343 return error; 344 345 /* Don't create entries in an unlinked directory */ 346 if (!dip->i_inode.i_nlink) 347 return -ENOENT; 348 349 if (dip->i_entries == (u32)-1) 350 return -EFBIG; 351 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 352 return -EMLINK; 353 354 return 0; 355 } 356 357 static void munge_mode_uid_gid(const struct gfs2_inode *dip, 358 struct inode *inode) 359 { 360 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 361 (dip->i_inode.i_mode & S_ISUID) && 362 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 363 if (S_ISDIR(inode->i_mode)) 364 inode->i_mode |= S_ISUID; 365 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 366 inode->i_mode &= ~07111; 367 inode->i_uid = dip->i_inode.i_uid; 368 } else 369 inode->i_uid = current_fsuid(); 370 371 if (dip->i_inode.i_mode & S_ISGID) { 372 if (S_ISDIR(inode->i_mode)) 373 inode->i_mode |= S_ISGID; 374 inode->i_gid = dip->i_inode.i_gid; 375 } else 376 inode->i_gid = current_fsgid(); 377 } 378 379 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 380 { 381 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 382 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 383 int error; 384 385 error = gfs2_quota_lock_check(ip, &ap); 386 if (error) 387 goto out; 388 389 error = gfs2_inplace_reserve(ip, &ap); 390 if (error) 391 goto out_quota; 392 393 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 394 if (error) 395 goto out_ipreserv; 396 397 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 398 ip->i_no_formal_ino = ip->i_generation; 399 ip->i_inode.i_ino = ip->i_no_addr; 400 ip->i_goal = ip->i_no_addr; 401 402 gfs2_trans_end(sdp); 403 404 out_ipreserv: 405 gfs2_inplace_release(ip); 406 out_quota: 407 gfs2_quota_unlock(ip); 408 out: 409 return error; 410 } 411 412 static void gfs2_init_dir(struct buffer_head *dibh, 413 const struct gfs2_inode *parent) 414 { 415 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 416 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 417 418 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 419 dent->de_inum = di->di_num; /* already GFS2 endian */ 420 dent->de_type = cpu_to_be16(DT_DIR); 421 422 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 423 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 424 gfs2_inum_out(parent, dent); 425 dent->de_type = cpu_to_be16(DT_DIR); 426 427 } 428 429 /** 430 * gfs2_init_xattr - Initialise an xattr block for a new inode 431 * @ip: The inode in question 432 * 433 * This sets up an empty xattr block for a new inode, ready to 434 * take any ACLs, LSM xattrs, etc. 435 */ 436 437 static void gfs2_init_xattr(struct gfs2_inode *ip) 438 { 439 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 440 struct buffer_head *bh; 441 struct gfs2_ea_header *ea; 442 443 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 444 gfs2_trans_add_meta(ip->i_gl, bh); 445 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 446 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 447 448 ea = GFS2_EA_BH2FIRST(bh); 449 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 450 ea->ea_type = GFS2_EATYPE_UNUSED; 451 ea->ea_flags = GFS2_EAFLAG_LAST; 452 453 brelse(bh); 454 } 455 456 /** 457 * init_dinode - Fill in a new dinode structure 458 * @dip: The directory this inode is being created in 459 * @ip: The inode 460 * @symname: The symlink destination (if a symlink) 461 * @bhp: The buffer head (returned to caller) 462 * 463 */ 464 465 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 466 const char *symname) 467 { 468 struct gfs2_dinode *di; 469 struct buffer_head *dibh; 470 471 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 472 gfs2_trans_add_meta(ip->i_gl, dibh); 473 di = (struct gfs2_dinode *)dibh->b_data; 474 gfs2_dinode_out(ip, di); 475 476 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); 477 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); 478 di->__pad1 = 0; 479 di->__pad2 = 0; 480 di->__pad3 = 0; 481 memset(&di->__pad4, 0, sizeof(di->__pad4)); 482 memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 483 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 484 485 switch(ip->i_inode.i_mode & S_IFMT) { 486 case S_IFDIR: 487 gfs2_init_dir(dibh, dip); 488 break; 489 case S_IFLNK: 490 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 491 break; 492 } 493 494 set_buffer_uptodate(dibh); 495 brelse(dibh); 496 } 497 498 /** 499 * gfs2_trans_da_blocks - Calculate number of blocks to link inode 500 * @dip: The directory we are linking into 501 * @da: The dir add information 502 * @nr_inodes: The number of inodes involved 503 * 504 * This calculate the number of blocks we need to reserve in a 505 * transaction to link @nr_inodes into a directory. In most cases 506 * @nr_inodes will be 2 (the directory plus the inode being linked in) 507 * but in case of rename, 4 may be required. 508 * 509 * Returns: Number of blocks 510 */ 511 512 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 513 const struct gfs2_diradd *da, 514 unsigned nr_inodes) 515 { 516 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 517 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 518 } 519 520 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 521 struct gfs2_inode *ip, struct gfs2_diradd *da) 522 { 523 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 524 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 525 int error; 526 527 if (da->nr_blocks) { 528 error = gfs2_quota_lock_check(dip, &ap); 529 if (error) 530 goto fail_quota_locks; 531 532 error = gfs2_inplace_reserve(dip, &ap); 533 if (error) 534 goto fail_quota_locks; 535 536 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 537 if (error) 538 goto fail_ipreserv; 539 } else { 540 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 541 if (error) 542 goto fail_quota_locks; 543 } 544 545 error = gfs2_dir_add(&dip->i_inode, name, ip, da); 546 547 gfs2_trans_end(sdp); 548 fail_ipreserv: 549 gfs2_inplace_release(dip); 550 fail_quota_locks: 551 gfs2_quota_unlock(dip); 552 return error; 553 } 554 555 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 556 void *fs_info) 557 { 558 const struct xattr *xattr; 559 int err = 0; 560 561 for (xattr = xattr_array; xattr->name != NULL; xattr++) { 562 err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 563 xattr->value_len, 0, 564 GFS2_EATYPE_SECURITY); 565 if (err < 0) 566 break; 567 } 568 return err; 569 } 570 571 /** 572 * gfs2_create_inode - Create a new inode 573 * @dir: The parent directory 574 * @dentry: The new dentry 575 * @file: If non-NULL, the file which is being opened 576 * @mode: The permissions on the new inode 577 * @dev: For device nodes, this is the device number 578 * @symname: For symlinks, this is the link destination 579 * @size: The initial size of the inode (ignored for directories) 580 * 581 * Returns: 0 on success, or error code 582 */ 583 584 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 585 struct file *file, 586 umode_t mode, dev_t dev, const char *symname, 587 unsigned int size, int excl, int *opened) 588 { 589 const struct qstr *name = &dentry->d_name; 590 struct posix_acl *default_acl, *acl; 591 struct gfs2_holder ghs[2]; 592 struct inode *inode = NULL; 593 struct gfs2_inode *dip = GFS2_I(dir), *ip; 594 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 595 struct gfs2_glock *io_gl; 596 int error, free_vfs_inode = 0; 597 u32 aflags = 0; 598 unsigned blocks = 1; 599 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 600 601 if (!name->len || name->len > GFS2_FNAMESIZE) 602 return -ENAMETOOLONG; 603 604 error = gfs2_rsqa_alloc(dip); 605 if (error) 606 return error; 607 608 error = gfs2_rindex_update(sdp); 609 if (error) 610 return error; 611 612 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 613 if (error) 614 goto fail; 615 616 error = create_ok(dip, name, mode); 617 if (error) 618 goto fail_gunlock; 619 620 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 621 error = PTR_ERR(inode); 622 if (!IS_ERR(inode)) { 623 if (S_ISDIR(inode->i_mode)) { 624 iput(inode); 625 inode = ERR_PTR(-EISDIR); 626 goto fail_gunlock; 627 } 628 d_instantiate(dentry, inode); 629 error = 0; 630 if (file) { 631 if (S_ISREG(inode->i_mode)) 632 error = finish_open(file, dentry, gfs2_open_common, opened); 633 else 634 error = finish_no_open(file, NULL); 635 } 636 gfs2_glock_dq_uninit(ghs); 637 return error; 638 } else if (error != -ENOENT) { 639 goto fail_gunlock; 640 } 641 642 error = gfs2_diradd_alloc_required(dir, name, &da); 643 if (error < 0) 644 goto fail_gunlock; 645 646 inode = new_inode(sdp->sd_vfs); 647 error = -ENOMEM; 648 if (!inode) 649 goto fail_gunlock; 650 651 error = posix_acl_create(dir, &mode, &default_acl, &acl); 652 if (error) 653 goto fail_free_vfs_inode; 654 655 ip = GFS2_I(inode); 656 error = gfs2_rsqa_alloc(ip); 657 if (error) 658 goto fail_free_acls; 659 660 inode->i_mode = mode; 661 set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 662 inode->i_rdev = dev; 663 inode->i_size = size; 664 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 665 gfs2_set_inode_blocks(inode, 1); 666 munge_mode_uid_gid(dip, inode); 667 check_and_update_goal(dip); 668 ip->i_goal = dip->i_goal; 669 ip->i_diskflags = 0; 670 ip->i_eattr = 0; 671 ip->i_height = 0; 672 ip->i_depth = 0; 673 ip->i_entries = 0; 674 675 switch(mode & S_IFMT) { 676 case S_IFREG: 677 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 678 gfs2_tune_get(sdp, gt_new_files_jdata)) 679 ip->i_diskflags |= GFS2_DIF_JDATA; 680 gfs2_set_aops(inode); 681 break; 682 case S_IFDIR: 683 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 684 ip->i_diskflags |= GFS2_DIF_JDATA; 685 ip->i_entries = 2; 686 break; 687 } 688 689 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 690 if (dip->i_diskflags & GFS2_DIF_SYSTEM) 691 ip->i_diskflags |= GFS2_DIF_SYSTEM; 692 693 gfs2_set_inode_flags(inode); 694 695 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 696 (dip->i_diskflags & GFS2_DIF_TOPDIR)) 697 aflags |= GFS2_AF_ORLOV; 698 699 if (default_acl || acl) 700 blocks++; 701 702 error = alloc_dinode(ip, aflags, &blocks); 703 if (error) 704 goto fail_free_inode; 705 706 gfs2_set_inode_blocks(inode, blocks); 707 708 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 709 if (error) 710 goto fail_free_inode; 711 712 ip->i_gl->gl_object = ip; 713 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 714 if (error) 715 goto fail_free_inode; 716 717 error = gfs2_trans_begin(sdp, blocks, 0); 718 if (error) 719 goto fail_gunlock2; 720 721 if (blocks > 1) { 722 ip->i_eattr = ip->i_no_addr + 1; 723 gfs2_init_xattr(ip); 724 } 725 init_dinode(dip, ip, symname); 726 gfs2_trans_end(sdp); 727 728 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 729 if (error) 730 goto fail_gunlock2; 731 732 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 733 if (error) 734 goto fail_gunlock2; 735 736 ip->i_iopen_gh.gh_gl->gl_object = ip; 737 gfs2_glock_put(io_gl); 738 gfs2_set_iop(inode); 739 insert_inode_hash(inode); 740 741 if (default_acl) { 742 error = gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 743 posix_acl_release(default_acl); 744 } 745 if (acl) { 746 if (!error) 747 error = gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 748 posix_acl_release(acl); 749 } 750 751 if (error) 752 goto fail_gunlock3; 753 754 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 755 &gfs2_initxattrs, NULL); 756 if (error) 757 goto fail_gunlock3; 758 759 error = link_dinode(dip, name, ip, &da); 760 if (error) 761 goto fail_gunlock3; 762 763 mark_inode_dirty(inode); 764 d_instantiate(dentry, inode); 765 if (file) { 766 *opened |= FILE_CREATED; 767 error = finish_open(file, dentry, gfs2_open_common, opened); 768 } 769 gfs2_glock_dq_uninit(ghs); 770 gfs2_glock_dq_uninit(ghs + 1); 771 return error; 772 773 fail_gunlock3: 774 gfs2_glock_dq_uninit(ghs + 1); 775 if (ip->i_gl) 776 gfs2_glock_put(ip->i_gl); 777 goto fail_gunlock; 778 779 fail_gunlock2: 780 gfs2_glock_dq_uninit(ghs + 1); 781 fail_free_inode: 782 if (ip->i_gl) 783 gfs2_glock_put(ip->i_gl); 784 gfs2_rsqa_delete(ip, NULL); 785 fail_free_acls: 786 if (default_acl) 787 posix_acl_release(default_acl); 788 if (acl) 789 posix_acl_release(acl); 790 fail_free_vfs_inode: 791 free_vfs_inode = 1; 792 fail_gunlock: 793 gfs2_dir_no_add(&da); 794 gfs2_glock_dq_uninit(ghs); 795 if (inode && !IS_ERR(inode)) { 796 clear_nlink(inode); 797 if (!free_vfs_inode) 798 mark_inode_dirty(inode); 799 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, 800 &GFS2_I(inode)->i_flags); 801 iput(inode); 802 } 803 fail: 804 return error; 805 } 806 807 /** 808 * gfs2_create - Create a file 809 * @dir: The directory in which to create the file 810 * @dentry: The dentry of the new file 811 * @mode: The mode of the new file 812 * 813 * Returns: errno 814 */ 815 816 static int gfs2_create(struct inode *dir, struct dentry *dentry, 817 umode_t mode, bool excl) 818 { 819 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL); 820 } 821 822 /** 823 * __gfs2_lookup - Look up a filename in a directory and return its inode 824 * @dir: The directory inode 825 * @dentry: The dentry of the new inode 826 * @file: File to be opened 827 * @opened: atomic_open flags 828 * 829 * 830 * Returns: errno 831 */ 832 833 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 834 struct file *file, int *opened) 835 { 836 struct inode *inode; 837 struct dentry *d; 838 struct gfs2_holder gh; 839 struct gfs2_glock *gl; 840 int error; 841 842 inode = gfs2_lookupi(dir, &dentry->d_name, 0); 843 if (inode == NULL) { 844 d_add(dentry, NULL); 845 return NULL; 846 } 847 if (IS_ERR(inode)) 848 return ERR_CAST(inode); 849 850 gl = GFS2_I(inode)->i_gl; 851 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 852 if (error) { 853 iput(inode); 854 return ERR_PTR(error); 855 } 856 857 d = d_splice_alias(inode, dentry); 858 if (IS_ERR(d)) { 859 gfs2_glock_dq_uninit(&gh); 860 return d; 861 } 862 if (file && S_ISREG(inode->i_mode)) 863 error = finish_open(file, dentry, gfs2_open_common, opened); 864 865 gfs2_glock_dq_uninit(&gh); 866 if (error) { 867 dput(d); 868 return ERR_PTR(error); 869 } 870 return d; 871 } 872 873 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 874 unsigned flags) 875 { 876 return __gfs2_lookup(dir, dentry, NULL, NULL); 877 } 878 879 /** 880 * gfs2_link - Link to a file 881 * @old_dentry: The inode to link 882 * @dir: Add link to this directory 883 * @dentry: The name of the link 884 * 885 * Link the inode in "old_dentry" into the directory "dir" with the 886 * name in "dentry". 887 * 888 * Returns: errno 889 */ 890 891 static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 892 struct dentry *dentry) 893 { 894 struct gfs2_inode *dip = GFS2_I(dir); 895 struct gfs2_sbd *sdp = GFS2_SB(dir); 896 struct inode *inode = d_inode(old_dentry); 897 struct gfs2_inode *ip = GFS2_I(inode); 898 struct gfs2_holder ghs[2]; 899 struct buffer_head *dibh; 900 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 901 int error; 902 903 if (S_ISDIR(inode->i_mode)) 904 return -EPERM; 905 906 error = gfs2_rsqa_alloc(dip); 907 if (error) 908 return error; 909 910 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 911 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 912 913 error = gfs2_glock_nq(ghs); /* parent */ 914 if (error) 915 goto out_parent; 916 917 error = gfs2_glock_nq(ghs + 1); /* child */ 918 if (error) 919 goto out_child; 920 921 error = -ENOENT; 922 if (inode->i_nlink == 0) 923 goto out_gunlock; 924 925 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 926 if (error) 927 goto out_gunlock; 928 929 error = gfs2_dir_check(dir, &dentry->d_name, NULL); 930 switch (error) { 931 case -ENOENT: 932 break; 933 case 0: 934 error = -EEXIST; 935 default: 936 goto out_gunlock; 937 } 938 939 error = -EINVAL; 940 if (!dip->i_inode.i_nlink) 941 goto out_gunlock; 942 error = -EFBIG; 943 if (dip->i_entries == (u32)-1) 944 goto out_gunlock; 945 error = -EPERM; 946 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 947 goto out_gunlock; 948 error = -EINVAL; 949 if (!ip->i_inode.i_nlink) 950 goto out_gunlock; 951 error = -EMLINK; 952 if (ip->i_inode.i_nlink == (u32)-1) 953 goto out_gunlock; 954 955 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 956 if (error < 0) 957 goto out_gunlock; 958 959 if (da.nr_blocks) { 960 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 961 error = gfs2_quota_lock_check(dip, &ap); 962 if (error) 963 goto out_gunlock; 964 965 error = gfs2_inplace_reserve(dip, &ap); 966 if (error) 967 goto out_gunlock_q; 968 969 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 970 if (error) 971 goto out_ipres; 972 } else { 973 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 974 if (error) 975 goto out_ipres; 976 } 977 978 error = gfs2_meta_inode_buffer(ip, &dibh); 979 if (error) 980 goto out_end_trans; 981 982 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 983 if (error) 984 goto out_brelse; 985 986 gfs2_trans_add_meta(ip->i_gl, dibh); 987 inc_nlink(&ip->i_inode); 988 ip->i_inode.i_ctime = CURRENT_TIME; 989 ihold(inode); 990 d_instantiate(dentry, inode); 991 mark_inode_dirty(inode); 992 993 out_brelse: 994 brelse(dibh); 995 out_end_trans: 996 gfs2_trans_end(sdp); 997 out_ipres: 998 if (da.nr_blocks) 999 gfs2_inplace_release(dip); 1000 out_gunlock_q: 1001 if (da.nr_blocks) 1002 gfs2_quota_unlock(dip); 1003 out_gunlock: 1004 gfs2_dir_no_add(&da); 1005 gfs2_glock_dq(ghs + 1); 1006 out_child: 1007 gfs2_glock_dq(ghs); 1008 out_parent: 1009 gfs2_holder_uninit(ghs); 1010 gfs2_holder_uninit(ghs + 1); 1011 return error; 1012 } 1013 1014 /* 1015 * gfs2_unlink_ok - check to see that a inode is still in a directory 1016 * @dip: the directory 1017 * @name: the name of the file 1018 * @ip: the inode 1019 * 1020 * Assumes that the lock on (at least) @dip is held. 1021 * 1022 * Returns: 0 if the parent/child relationship is correct, errno if it isn't 1023 */ 1024 1025 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 1026 const struct gfs2_inode *ip) 1027 { 1028 int error; 1029 1030 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 1031 return -EPERM; 1032 1033 if ((dip->i_inode.i_mode & S_ISVTX) && 1034 !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 1035 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 1036 return -EPERM; 1037 1038 if (IS_APPEND(&dip->i_inode)) 1039 return -EPERM; 1040 1041 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 1042 if (error) 1043 return error; 1044 1045 return gfs2_dir_check(&dip->i_inode, name, ip); 1046 } 1047 1048 /** 1049 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 1050 * @dip: The parent directory 1051 * @name: The name of the entry in the parent directory 1052 * @inode: The inode to be removed 1053 * 1054 * Called with all the locks and in a transaction. This will only be 1055 * called for a directory after it has been checked to ensure it is empty. 1056 * 1057 * Returns: 0 on success, or an error 1058 */ 1059 1060 static int gfs2_unlink_inode(struct gfs2_inode *dip, 1061 const struct dentry *dentry) 1062 { 1063 struct inode *inode = d_inode(dentry); 1064 struct gfs2_inode *ip = GFS2_I(inode); 1065 int error; 1066 1067 error = gfs2_dir_del(dip, dentry); 1068 if (error) 1069 return error; 1070 1071 ip->i_entries = 0; 1072 inode->i_ctime = CURRENT_TIME; 1073 if (S_ISDIR(inode->i_mode)) 1074 clear_nlink(inode); 1075 else 1076 drop_nlink(inode); 1077 mark_inode_dirty(inode); 1078 if (inode->i_nlink == 0) 1079 gfs2_unlink_di(inode); 1080 return 0; 1081 } 1082 1083 1084 /** 1085 * gfs2_unlink - Unlink an inode (this does rmdir as well) 1086 * @dir: The inode of the directory containing the inode to unlink 1087 * @dentry: The file itself 1088 * 1089 * This routine uses the type of the inode as a flag to figure out 1090 * whether this is an unlink or an rmdir. 1091 * 1092 * Returns: errno 1093 */ 1094 1095 static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 1096 { 1097 struct gfs2_inode *dip = GFS2_I(dir); 1098 struct gfs2_sbd *sdp = GFS2_SB(dir); 1099 struct inode *inode = d_inode(dentry); 1100 struct gfs2_inode *ip = GFS2_I(inode); 1101 struct gfs2_holder ghs[3]; 1102 struct gfs2_rgrpd *rgd; 1103 int error; 1104 1105 error = gfs2_rindex_update(sdp); 1106 if (error) 1107 return error; 1108 1109 error = -EROFS; 1110 1111 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 1112 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 1113 1114 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1115 if (!rgd) 1116 goto out_inodes; 1117 1118 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 1119 1120 1121 error = gfs2_glock_nq(ghs); /* parent */ 1122 if (error) 1123 goto out_parent; 1124 1125 error = gfs2_glock_nq(ghs + 1); /* child */ 1126 if (error) 1127 goto out_child; 1128 1129 error = -ENOENT; 1130 if (inode->i_nlink == 0) 1131 goto out_rgrp; 1132 1133 if (S_ISDIR(inode->i_mode)) { 1134 error = -ENOTEMPTY; 1135 if (ip->i_entries > 2 || inode->i_nlink > 2) 1136 goto out_rgrp; 1137 } 1138 1139 error = gfs2_glock_nq(ghs + 2); /* rgrp */ 1140 if (error) 1141 goto out_rgrp; 1142 1143 error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 1144 if (error) 1145 goto out_gunlock; 1146 1147 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 1148 if (error) 1149 goto out_end_trans; 1150 1151 error = gfs2_unlink_inode(dip, dentry); 1152 1153 out_end_trans: 1154 gfs2_trans_end(sdp); 1155 out_gunlock: 1156 gfs2_glock_dq(ghs + 2); 1157 out_rgrp: 1158 gfs2_glock_dq(ghs + 1); 1159 out_child: 1160 gfs2_glock_dq(ghs); 1161 out_parent: 1162 gfs2_holder_uninit(ghs + 2); 1163 out_inodes: 1164 gfs2_holder_uninit(ghs + 1); 1165 gfs2_holder_uninit(ghs); 1166 return error; 1167 } 1168 1169 /** 1170 * gfs2_symlink - Create a symlink 1171 * @dir: The directory to create the symlink in 1172 * @dentry: The dentry to put the symlink in 1173 * @symname: The thing which the link points to 1174 * 1175 * Returns: errno 1176 */ 1177 1178 static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 1179 const char *symname) 1180 { 1181 struct gfs2_sbd *sdp = GFS2_SB(dir); 1182 unsigned int size; 1183 1184 size = strlen(symname); 1185 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) 1186 return -ENAMETOOLONG; 1187 1188 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL); 1189 } 1190 1191 /** 1192 * gfs2_mkdir - Make a directory 1193 * @dir: The parent directory of the new one 1194 * @dentry: The dentry of the new directory 1195 * @mode: The mode of the new directory 1196 * 1197 * Returns: errno 1198 */ 1199 1200 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 1201 { 1202 struct gfs2_sbd *sdp = GFS2_SB(dir); 1203 unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); 1204 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL); 1205 } 1206 1207 /** 1208 * gfs2_mknod - Make a special file 1209 * @dir: The directory in which the special file will reside 1210 * @dentry: The dentry of the special file 1211 * @mode: The mode of the special file 1212 * @dev: The device specification of the special file 1213 * 1214 */ 1215 1216 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 1217 dev_t dev) 1218 { 1219 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL); 1220 } 1221 1222 /** 1223 * gfs2_atomic_open - Atomically open a file 1224 * @dir: The directory 1225 * @dentry: The proposed new entry 1226 * @file: The proposed new struct file 1227 * @flags: open flags 1228 * @mode: File mode 1229 * @opened: Flag to say whether the file has been opened or not 1230 * 1231 * Returns: error code or 0 for success 1232 */ 1233 1234 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 1235 struct file *file, unsigned flags, 1236 umode_t mode, int *opened) 1237 { 1238 struct dentry *d; 1239 bool excl = !!(flags & O_EXCL); 1240 1241 if (!d_unhashed(dentry)) 1242 goto skip_lookup; 1243 1244 d = __gfs2_lookup(dir, dentry, file, opened); 1245 if (IS_ERR(d)) 1246 return PTR_ERR(d); 1247 if (d != NULL) 1248 dentry = d; 1249 if (d_really_is_positive(dentry)) { 1250 if (!(*opened & FILE_OPENED)) 1251 return finish_no_open(file, d); 1252 dput(d); 1253 return 0; 1254 } 1255 1256 BUG_ON(d != NULL); 1257 1258 skip_lookup: 1259 if (!(flags & O_CREAT)) 1260 return -ENOENT; 1261 1262 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened); 1263 } 1264 1265 /* 1266 * gfs2_ok_to_move - check if it's ok to move a directory to another directory 1267 * @this: move this 1268 * @to: to here 1269 * 1270 * Follow @to back to the root and make sure we don't encounter @this 1271 * Assumes we already hold the rename lock. 1272 * 1273 * Returns: errno 1274 */ 1275 1276 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 1277 { 1278 struct inode *dir = &to->i_inode; 1279 struct super_block *sb = dir->i_sb; 1280 struct inode *tmp; 1281 int error = 0; 1282 1283 igrab(dir); 1284 1285 for (;;) { 1286 if (dir == &this->i_inode) { 1287 error = -EINVAL; 1288 break; 1289 } 1290 if (dir == d_inode(sb->s_root)) { 1291 error = 0; 1292 break; 1293 } 1294 1295 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 1296 if (!tmp) { 1297 error = -ENOENT; 1298 break; 1299 } 1300 if (IS_ERR(tmp)) { 1301 error = PTR_ERR(tmp); 1302 break; 1303 } 1304 1305 iput(dir); 1306 dir = tmp; 1307 } 1308 1309 iput(dir); 1310 1311 return error; 1312 } 1313 1314 /** 1315 * update_moved_ino - Update an inode that's being moved 1316 * @ip: The inode being moved 1317 * @ndip: The parent directory of the new filename 1318 * @dir_rename: True of ip is a directory 1319 * 1320 * Returns: errno 1321 */ 1322 1323 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1324 int dir_rename) 1325 { 1326 int error; 1327 struct buffer_head *dibh; 1328 1329 if (dir_rename) 1330 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1331 1332 error = gfs2_meta_inode_buffer(ip, &dibh); 1333 if (error) 1334 return error; 1335 ip->i_inode.i_ctime = CURRENT_TIME; 1336 gfs2_trans_add_meta(ip->i_gl, dibh); 1337 gfs2_dinode_out(ip, dibh->b_data); 1338 brelse(dibh); 1339 return 0; 1340 } 1341 1342 1343 /** 1344 * gfs2_rename - Rename a file 1345 * @odir: Parent directory of old file name 1346 * @odentry: The old dentry of the file 1347 * @ndir: Parent directory of new file name 1348 * @ndentry: The new dentry of the file 1349 * 1350 * Returns: errno 1351 */ 1352 1353 static int gfs2_rename(struct inode *odir, struct dentry *odentry, 1354 struct inode *ndir, struct dentry *ndentry) 1355 { 1356 struct gfs2_inode *odip = GFS2_I(odir); 1357 struct gfs2_inode *ndip = GFS2_I(ndir); 1358 struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 1359 struct gfs2_inode *nip = NULL; 1360 struct gfs2_sbd *sdp = GFS2_SB(odir); 1361 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; 1362 struct gfs2_rgrpd *nrgd; 1363 unsigned int num_gh; 1364 int dir_rename = 0; 1365 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 1366 unsigned int x; 1367 int error; 1368 1369 if (d_really_is_positive(ndentry)) { 1370 nip = GFS2_I(d_inode(ndentry)); 1371 if (ip == nip) 1372 return 0; 1373 } 1374 1375 error = gfs2_rindex_update(sdp); 1376 if (error) 1377 return error; 1378 1379 error = gfs2_rsqa_alloc(ndip); 1380 if (error) 1381 return error; 1382 1383 if (odip != ndip) { 1384 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1385 0, &r_gh); 1386 if (error) 1387 goto out; 1388 1389 if (S_ISDIR(ip->i_inode.i_mode)) { 1390 dir_rename = 1; 1391 /* don't move a directory into its subdir */ 1392 error = gfs2_ok_to_move(ip, ndip); 1393 if (error) 1394 goto out_gunlock_r; 1395 } 1396 } 1397 1398 num_gh = 1; 1399 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 1400 if (odip != ndip) { 1401 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1402 num_gh++; 1403 } 1404 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1405 num_gh++; 1406 1407 if (nip) { 1408 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1409 num_gh++; 1410 /* grab the resource lock for unlink flag twiddling 1411 * this is the case of the target file already existing 1412 * so we unlink before doing the rename 1413 */ 1414 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1415 if (nrgd) 1416 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); 1417 } 1418 1419 for (x = 0; x < num_gh; x++) { 1420 error = gfs2_glock_nq(ghs + x); 1421 if (error) 1422 goto out_gunlock; 1423 } 1424 1425 error = -ENOENT; 1426 if (ip->i_inode.i_nlink == 0) 1427 goto out_gunlock; 1428 1429 /* Check out the old directory */ 1430 1431 error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 1432 if (error) 1433 goto out_gunlock; 1434 1435 /* Check out the new directory */ 1436 1437 if (nip) { 1438 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1439 if (error) 1440 goto out_gunlock; 1441 1442 if (nip->i_inode.i_nlink == 0) { 1443 error = -EAGAIN; 1444 goto out_gunlock; 1445 } 1446 1447 if (S_ISDIR(nip->i_inode.i_mode)) { 1448 if (nip->i_entries < 2) { 1449 gfs2_consist_inode(nip); 1450 error = -EIO; 1451 goto out_gunlock; 1452 } 1453 if (nip->i_entries > 2) { 1454 error = -ENOTEMPTY; 1455 goto out_gunlock; 1456 } 1457 } 1458 } else { 1459 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 1460 if (error) 1461 goto out_gunlock; 1462 1463 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 1464 switch (error) { 1465 case -ENOENT: 1466 error = 0; 1467 break; 1468 case 0: 1469 error = -EEXIST; 1470 default: 1471 goto out_gunlock; 1472 }; 1473 1474 if (odip != ndip) { 1475 if (!ndip->i_inode.i_nlink) { 1476 error = -ENOENT; 1477 goto out_gunlock; 1478 } 1479 if (ndip->i_entries == (u32)-1) { 1480 error = -EFBIG; 1481 goto out_gunlock; 1482 } 1483 if (S_ISDIR(ip->i_inode.i_mode) && 1484 ndip->i_inode.i_nlink == (u32)-1) { 1485 error = -EMLINK; 1486 goto out_gunlock; 1487 } 1488 } 1489 } 1490 1491 /* Check out the dir to be renamed */ 1492 1493 if (dir_rename) { 1494 error = gfs2_permission(d_inode(odentry), MAY_WRITE); 1495 if (error) 1496 goto out_gunlock; 1497 } 1498 1499 if (nip == NULL) { 1500 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 1501 if (error) 1502 goto out_gunlock; 1503 } 1504 1505 if (da.nr_blocks) { 1506 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1507 error = gfs2_quota_lock_check(ndip, &ap); 1508 if (error) 1509 goto out_gunlock; 1510 1511 error = gfs2_inplace_reserve(ndip, &ap); 1512 if (error) 1513 goto out_gunlock_q; 1514 1515 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1516 4 * RES_LEAF + 4, 0); 1517 if (error) 1518 goto out_ipreserv; 1519 } else { 1520 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 1521 5 * RES_LEAF + 4, 0); 1522 if (error) 1523 goto out_gunlock; 1524 } 1525 1526 /* Remove the target file, if it exists */ 1527 1528 if (nip) 1529 error = gfs2_unlink_inode(ndip, ndentry); 1530 1531 error = update_moved_ino(ip, ndip, dir_rename); 1532 if (error) 1533 goto out_end_trans; 1534 1535 error = gfs2_dir_del(odip, odentry); 1536 if (error) 1537 goto out_end_trans; 1538 1539 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 1540 if (error) 1541 goto out_end_trans; 1542 1543 out_end_trans: 1544 gfs2_trans_end(sdp); 1545 out_ipreserv: 1546 if (da.nr_blocks) 1547 gfs2_inplace_release(ndip); 1548 out_gunlock_q: 1549 if (da.nr_blocks) 1550 gfs2_quota_unlock(ndip); 1551 out_gunlock: 1552 gfs2_dir_no_add(&da); 1553 while (x--) { 1554 gfs2_glock_dq(ghs + x); 1555 gfs2_holder_uninit(ghs + x); 1556 } 1557 out_gunlock_r: 1558 if (r_gh.gh_gl) 1559 gfs2_glock_dq_uninit(&r_gh); 1560 out: 1561 return error; 1562 } 1563 1564 /** 1565 * gfs2_exchange - exchange two files 1566 * @odir: Parent directory of old file name 1567 * @odentry: The old dentry of the file 1568 * @ndir: Parent directory of new file name 1569 * @ndentry: The new dentry of the file 1570 * @flags: The rename flags 1571 * 1572 * Returns: errno 1573 */ 1574 1575 static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1576 struct inode *ndir, struct dentry *ndentry, 1577 unsigned int flags) 1578 { 1579 struct gfs2_inode *odip = GFS2_I(odir); 1580 struct gfs2_inode *ndip = GFS2_I(ndir); 1581 struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1582 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1583 struct gfs2_sbd *sdp = GFS2_SB(odir); 1584 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; 1585 unsigned int num_gh; 1586 unsigned int x; 1587 umode_t old_mode = oip->i_inode.i_mode; 1588 umode_t new_mode = nip->i_inode.i_mode; 1589 int error; 1590 1591 error = gfs2_rindex_update(sdp); 1592 if (error) 1593 return error; 1594 1595 if (odip != ndip) { 1596 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1597 0, &r_gh); 1598 if (error) 1599 goto out; 1600 1601 if (S_ISDIR(old_mode)) { 1602 /* don't move a directory into its subdir */ 1603 error = gfs2_ok_to_move(oip, ndip); 1604 if (error) 1605 goto out_gunlock_r; 1606 } 1607 1608 if (S_ISDIR(new_mode)) { 1609 /* don't move a directory into its subdir */ 1610 error = gfs2_ok_to_move(nip, odip); 1611 if (error) 1612 goto out_gunlock_r; 1613 } 1614 } 1615 1616 num_gh = 1; 1617 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 1618 if (odip != ndip) { 1619 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1620 num_gh++; 1621 } 1622 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1623 num_gh++; 1624 1625 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1626 num_gh++; 1627 1628 for (x = 0; x < num_gh; x++) { 1629 error = gfs2_glock_nq(ghs + x); 1630 if (error) 1631 goto out_gunlock; 1632 } 1633 1634 error = -ENOENT; 1635 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1636 goto out_gunlock; 1637 1638 error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1639 if (error) 1640 goto out_gunlock; 1641 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1642 if (error) 1643 goto out_gunlock; 1644 1645 if (S_ISDIR(old_mode)) { 1646 error = gfs2_permission(odentry->d_inode, MAY_WRITE); 1647 if (error) 1648 goto out_gunlock; 1649 } 1650 if (S_ISDIR(new_mode)) { 1651 error = gfs2_permission(ndentry->d_inode, MAY_WRITE); 1652 if (error) 1653 goto out_gunlock; 1654 } 1655 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1656 if (error) 1657 goto out_gunlock; 1658 1659 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1660 if (error) 1661 goto out_end_trans; 1662 1663 error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1664 if (error) 1665 goto out_end_trans; 1666 1667 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1668 IF2DT(old_mode)); 1669 if (error) 1670 goto out_end_trans; 1671 1672 error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1673 IF2DT(new_mode)); 1674 if (error) 1675 goto out_end_trans; 1676 1677 if (odip != ndip) { 1678 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1679 inc_nlink(&odip->i_inode); 1680 drop_nlink(&ndip->i_inode); 1681 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1682 inc_nlink(&ndip->i_inode); 1683 drop_nlink(&odip->i_inode); 1684 } 1685 } 1686 mark_inode_dirty(&ndip->i_inode); 1687 if (odip != ndip) 1688 mark_inode_dirty(&odip->i_inode); 1689 1690 out_end_trans: 1691 gfs2_trans_end(sdp); 1692 out_gunlock: 1693 while (x--) { 1694 gfs2_glock_dq(ghs + x); 1695 gfs2_holder_uninit(ghs + x); 1696 } 1697 out_gunlock_r: 1698 if (r_gh.gh_gl) 1699 gfs2_glock_dq_uninit(&r_gh); 1700 out: 1701 return error; 1702 } 1703 1704 static int gfs2_rename2(struct inode *odir, struct dentry *odentry, 1705 struct inode *ndir, struct dentry *ndentry, 1706 unsigned int flags) 1707 { 1708 flags &= ~RENAME_NOREPLACE; 1709 1710 if (flags & ~RENAME_EXCHANGE) 1711 return -EINVAL; 1712 1713 if (flags & RENAME_EXCHANGE) 1714 return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1715 1716 return gfs2_rename(odir, odentry, ndir, ndentry); 1717 } 1718 1719 /** 1720 * gfs2_follow_link - Follow a symbolic link 1721 * @dentry: The dentry of the link 1722 * @nd: Data that we pass to vfs_follow_link() 1723 * 1724 * This can handle symlinks of any size. 1725 * 1726 * Returns: 0 on success or error code 1727 */ 1728 1729 static const char *gfs2_follow_link(struct dentry *dentry, void **cookie) 1730 { 1731 struct gfs2_inode *ip = GFS2_I(d_inode(dentry)); 1732 struct gfs2_holder i_gh; 1733 struct buffer_head *dibh; 1734 unsigned int size; 1735 char *buf; 1736 int error; 1737 1738 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 1739 error = gfs2_glock_nq(&i_gh); 1740 if (error) { 1741 gfs2_holder_uninit(&i_gh); 1742 return ERR_PTR(error); 1743 } 1744 1745 size = (unsigned int)i_size_read(&ip->i_inode); 1746 if (size == 0) { 1747 gfs2_consist_inode(ip); 1748 buf = ERR_PTR(-EIO); 1749 goto out; 1750 } 1751 1752 error = gfs2_meta_inode_buffer(ip, &dibh); 1753 if (error) { 1754 buf = ERR_PTR(error); 1755 goto out; 1756 } 1757 1758 buf = kzalloc(size + 1, GFP_NOFS); 1759 if (!buf) 1760 buf = ERR_PTR(-ENOMEM); 1761 else 1762 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 1763 brelse(dibh); 1764 out: 1765 gfs2_glock_dq_uninit(&i_gh); 1766 if (!IS_ERR(buf)) 1767 *cookie = buf; 1768 return buf; 1769 } 1770 1771 /** 1772 * gfs2_permission - 1773 * @inode: The inode 1774 * @mask: The mask to be tested 1775 * @flags: Indicates whether this is an RCU path walk or not 1776 * 1777 * This may be called from the VFS directly, or from within GFS2 with the 1778 * inode locked, so we look to see if the glock is already locked and only 1779 * lock the glock if its not already been done. 1780 * 1781 * Returns: errno 1782 */ 1783 1784 int gfs2_permission(struct inode *inode, int mask) 1785 { 1786 struct gfs2_inode *ip; 1787 struct gfs2_holder i_gh; 1788 int error; 1789 int unlock = 0; 1790 1791 1792 ip = GFS2_I(inode); 1793 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 1794 if (mask & MAY_NOT_BLOCK) 1795 return -ECHILD; 1796 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 1797 if (error) 1798 return error; 1799 unlock = 1; 1800 } 1801 1802 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1803 error = -EACCES; 1804 else 1805 error = generic_permission(inode, mask); 1806 if (unlock) 1807 gfs2_glock_dq_uninit(&i_gh); 1808 1809 return error; 1810 } 1811 1812 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 1813 { 1814 setattr_copy(inode, attr); 1815 mark_inode_dirty(inode); 1816 return 0; 1817 } 1818 1819 /** 1820 * gfs2_setattr_simple - 1821 * @ip: 1822 * @attr: 1823 * 1824 * Returns: errno 1825 */ 1826 1827 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 1828 { 1829 int error; 1830 1831 if (current->journal_info) 1832 return __gfs2_setattr_simple(inode, attr); 1833 1834 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 1835 if (error) 1836 return error; 1837 1838 error = __gfs2_setattr_simple(inode, attr); 1839 gfs2_trans_end(GFS2_SB(inode)); 1840 return error; 1841 } 1842 1843 static int setattr_chown(struct inode *inode, struct iattr *attr) 1844 { 1845 struct gfs2_inode *ip = GFS2_I(inode); 1846 struct gfs2_sbd *sdp = GFS2_SB(inode); 1847 kuid_t ouid, nuid; 1848 kgid_t ogid, ngid; 1849 int error; 1850 struct gfs2_alloc_parms ap; 1851 1852 ouid = inode->i_uid; 1853 ogid = inode->i_gid; 1854 nuid = attr->ia_uid; 1855 ngid = attr->ia_gid; 1856 1857 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1858 ouid = nuid = NO_UID_QUOTA_CHANGE; 1859 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1860 ogid = ngid = NO_GID_QUOTA_CHANGE; 1861 1862 error = get_write_access(inode); 1863 if (error) 1864 return error; 1865 1866 error = gfs2_rsqa_alloc(ip); 1867 if (error) 1868 goto out; 1869 1870 error = gfs2_rindex_update(sdp); 1871 if (error) 1872 goto out; 1873 1874 error = gfs2_quota_lock(ip, nuid, ngid); 1875 if (error) 1876 goto out; 1877 1878 ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1879 1880 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 1881 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1882 error = gfs2_quota_check(ip, nuid, ngid, &ap); 1883 if (error) 1884 goto out_gunlock_q; 1885 } 1886 1887 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 1888 if (error) 1889 goto out_gunlock_q; 1890 1891 error = gfs2_setattr_simple(inode, attr); 1892 if (error) 1893 goto out_end_trans; 1894 1895 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 1896 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1897 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1898 gfs2_quota_change(ip, ap.target, nuid, ngid); 1899 } 1900 1901 out_end_trans: 1902 gfs2_trans_end(sdp); 1903 out_gunlock_q: 1904 gfs2_quota_unlock(ip); 1905 out: 1906 put_write_access(inode); 1907 return error; 1908 } 1909 1910 /** 1911 * gfs2_setattr - Change attributes on an inode 1912 * @dentry: The dentry which is changing 1913 * @attr: The structure describing the change 1914 * 1915 * The VFS layer wants to change one or more of an inodes attributes. Write 1916 * that change out to disk. 1917 * 1918 * Returns: errno 1919 */ 1920 1921 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 1922 { 1923 struct inode *inode = d_inode(dentry); 1924 struct gfs2_inode *ip = GFS2_I(inode); 1925 struct gfs2_holder i_gh; 1926 int error; 1927 1928 error = gfs2_rsqa_alloc(ip); 1929 if (error) 1930 return error; 1931 1932 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 1933 if (error) 1934 return error; 1935 1936 error = -EPERM; 1937 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 1938 goto out; 1939 1940 error = inode_change_ok(inode, attr); 1941 if (error) 1942 goto out; 1943 1944 if (attr->ia_valid & ATTR_SIZE) 1945 error = gfs2_setattr_size(inode, attr->ia_size); 1946 else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 1947 error = setattr_chown(inode, attr); 1948 else { 1949 error = gfs2_setattr_simple(inode, attr); 1950 if (!error && attr->ia_valid & ATTR_MODE) 1951 error = posix_acl_chmod(inode, inode->i_mode); 1952 } 1953 1954 out: 1955 if (!error) 1956 mark_inode_dirty(inode); 1957 gfs2_glock_dq_uninit(&i_gh); 1958 return error; 1959 } 1960 1961 /** 1962 * gfs2_getattr - Read out an inode's attributes 1963 * @mnt: The vfsmount the inode is being accessed from 1964 * @dentry: The dentry to stat 1965 * @stat: The inode's stats 1966 * 1967 * This may be called from the VFS directly, or from within GFS2 with the 1968 * inode locked, so we look to see if the glock is already locked and only 1969 * lock the glock if its not already been done. Note that its the NFS 1970 * readdirplus operation which causes this to be called (from filldir) 1971 * with the glock already held. 1972 * 1973 * Returns: errno 1974 */ 1975 1976 static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, 1977 struct kstat *stat) 1978 { 1979 struct inode *inode = d_inode(dentry); 1980 struct gfs2_inode *ip = GFS2_I(inode); 1981 struct gfs2_holder gh; 1982 int error; 1983 int unlock = 0; 1984 1985 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 1986 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 1987 if (error) 1988 return error; 1989 unlock = 1; 1990 } 1991 1992 generic_fillattr(inode, stat); 1993 if (unlock) 1994 gfs2_glock_dq_uninit(&gh); 1995 1996 return 0; 1997 } 1998 1999 static int gfs2_setxattr(struct dentry *dentry, const char *name, 2000 const void *data, size_t size, int flags) 2001 { 2002 struct inode *inode = d_inode(dentry); 2003 struct gfs2_inode *ip = GFS2_I(inode); 2004 struct gfs2_holder gh; 2005 int ret; 2006 2007 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 2008 ret = gfs2_glock_nq(&gh); 2009 if (ret == 0) { 2010 ret = gfs2_rsqa_alloc(ip); 2011 if (ret == 0) 2012 ret = generic_setxattr(dentry, name, data, size, flags); 2013 gfs2_glock_dq(&gh); 2014 } 2015 gfs2_holder_uninit(&gh); 2016 return ret; 2017 } 2018 2019 static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, 2020 void *data, size_t size) 2021 { 2022 struct inode *inode = d_inode(dentry); 2023 struct gfs2_inode *ip = GFS2_I(inode); 2024 struct gfs2_holder gh; 2025 int ret; 2026 2027 /* For selinux during lookup */ 2028 if (gfs2_glock_is_locked_by_me(ip->i_gl)) 2029 return generic_getxattr(dentry, name, data, size); 2030 2031 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 2032 ret = gfs2_glock_nq(&gh); 2033 if (ret == 0) { 2034 ret = generic_getxattr(dentry, name, data, size); 2035 gfs2_glock_dq(&gh); 2036 } 2037 gfs2_holder_uninit(&gh); 2038 return ret; 2039 } 2040 2041 static int gfs2_removexattr(struct dentry *dentry, const char *name) 2042 { 2043 struct inode *inode = d_inode(dentry); 2044 struct gfs2_inode *ip = GFS2_I(inode); 2045 struct gfs2_holder gh; 2046 int ret; 2047 2048 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 2049 ret = gfs2_glock_nq(&gh); 2050 if (ret == 0) { 2051 ret = gfs2_rsqa_alloc(ip); 2052 if (ret == 0) 2053 ret = generic_removexattr(dentry, name); 2054 gfs2_glock_dq(&gh); 2055 } 2056 gfs2_holder_uninit(&gh); 2057 return ret; 2058 } 2059 2060 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 2061 u64 start, u64 len) 2062 { 2063 struct gfs2_inode *ip = GFS2_I(inode); 2064 struct gfs2_holder gh; 2065 int ret; 2066 2067 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); 2068 if (ret) 2069 return ret; 2070 2071 mutex_lock(&inode->i_mutex); 2072 2073 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2074 if (ret) 2075 goto out; 2076 2077 if (gfs2_is_stuffed(ip)) { 2078 u64 phys = ip->i_no_addr << inode->i_blkbits; 2079 u64 size = i_size_read(inode); 2080 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| 2081 FIEMAP_EXTENT_DATA_INLINE; 2082 phys += sizeof(struct gfs2_dinode); 2083 phys += start; 2084 if (start + len > size) 2085 len = size - start; 2086 if (start < size) 2087 ret = fiemap_fill_next_extent(fieinfo, start, phys, 2088 len, flags); 2089 if (ret == 1) 2090 ret = 0; 2091 } else { 2092 ret = __generic_block_fiemap(inode, fieinfo, start, len, 2093 gfs2_block_map); 2094 } 2095 2096 gfs2_glock_dq_uninit(&gh); 2097 out: 2098 mutex_unlock(&inode->i_mutex); 2099 return ret; 2100 } 2101 2102 const struct inode_operations gfs2_file_iops = { 2103 .permission = gfs2_permission, 2104 .setattr = gfs2_setattr, 2105 .getattr = gfs2_getattr, 2106 .setxattr = gfs2_setxattr, 2107 .getxattr = gfs2_getxattr, 2108 .listxattr = gfs2_listxattr, 2109 .removexattr = gfs2_removexattr, 2110 .fiemap = gfs2_fiemap, 2111 .get_acl = gfs2_get_acl, 2112 .set_acl = gfs2_set_acl, 2113 }; 2114 2115 const struct inode_operations gfs2_dir_iops = { 2116 .create = gfs2_create, 2117 .lookup = gfs2_lookup, 2118 .link = gfs2_link, 2119 .unlink = gfs2_unlink, 2120 .symlink = gfs2_symlink, 2121 .mkdir = gfs2_mkdir, 2122 .rmdir = gfs2_unlink, 2123 .mknod = gfs2_mknod, 2124 .rename2 = gfs2_rename2, 2125 .permission = gfs2_permission, 2126 .setattr = gfs2_setattr, 2127 .getattr = gfs2_getattr, 2128 .setxattr = gfs2_setxattr, 2129 .getxattr = gfs2_getxattr, 2130 .listxattr = gfs2_listxattr, 2131 .removexattr = gfs2_removexattr, 2132 .fiemap = gfs2_fiemap, 2133 .get_acl = gfs2_get_acl, 2134 .set_acl = gfs2_set_acl, 2135 .atomic_open = gfs2_atomic_open, 2136 }; 2137 2138 const struct inode_operations gfs2_symlink_iops = { 2139 .readlink = generic_readlink, 2140 .follow_link = gfs2_follow_link, 2141 .put_link = kfree_put_link, 2142 .permission = gfs2_permission, 2143 .setattr = gfs2_setattr, 2144 .getattr = gfs2_getattr, 2145 .setxattr = gfs2_setxattr, 2146 .getxattr = gfs2_getxattr, 2147 .listxattr = gfs2_listxattr, 2148 .removexattr = gfs2_removexattr, 2149 .fiemap = gfs2_fiemap, 2150 }; 2151 2152