1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 5 */ 6 7 #include <linux/slab.h> 8 #include <linux/spinlock.h> 9 #include <linux/completion.h> 10 #include <linux/buffer_head.h> 11 #include <linux/namei.h> 12 #include <linux/mm.h> 13 #include <linux/cred.h> 14 #include <linux/xattr.h> 15 #include <linux/posix_acl.h> 16 #include <linux/gfs2_ondisk.h> 17 #include <linux/crc32.h> 18 #include <linux/iomap.h> 19 #include <linux/security.h> 20 #include <linux/uaccess.h> 21 22 #include "gfs2.h" 23 #include "incore.h" 24 #include "acl.h" 25 #include "bmap.h" 26 #include "dir.h" 27 #include "xattr.h" 28 #include "glock.h" 29 #include "inode.h" 30 #include "meta_io.h" 31 #include "quota.h" 32 #include "rgrp.h" 33 #include "trans.h" 34 #include "util.h" 35 #include "super.h" 36 #include "glops.h" 37 38 static int iget_test(struct inode *inode, void *opaque) 39 { 40 u64 no_addr = *(u64 *)opaque; 41 42 return GFS2_I(inode)->i_no_addr == no_addr; 43 } 44 45 static int iget_set(struct inode *inode, void *opaque) 46 { 47 u64 no_addr = *(u64 *)opaque; 48 49 GFS2_I(inode)->i_no_addr = no_addr; 50 inode->i_ino = no_addr; 51 return 0; 52 } 53 54 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) 55 { 56 struct inode *inode; 57 58 repeat: 59 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); 60 if (!inode) 61 return inode; 62 if (is_bad_inode(inode)) { 63 iput(inode); 64 goto repeat; 65 } 66 return inode; 67 } 68 69 /** 70 * gfs2_set_iop - Sets inode operations 71 * @inode: The inode with correct i_mode filled in 72 * 73 * GFS2 lookup code fills in vfs inode contents based on info obtained 74 * from directory entry inside gfs2_inode_lookup(). 75 */ 76 77 static void gfs2_set_iop(struct inode *inode) 78 { 79 struct gfs2_sbd *sdp = GFS2_SB(inode); 80 umode_t mode = inode->i_mode; 81 82 if (S_ISREG(mode)) { 83 inode->i_op = &gfs2_file_iops; 84 if (gfs2_localflocks(sdp)) 85 inode->i_fop = &gfs2_file_fops_nolock; 86 else 87 inode->i_fop = &gfs2_file_fops; 88 } else if (S_ISDIR(mode)) { 89 inode->i_op = &gfs2_dir_iops; 90 if (gfs2_localflocks(sdp)) 91 inode->i_fop = &gfs2_dir_fops_nolock; 92 else 93 inode->i_fop = &gfs2_dir_fops; 94 } else if (S_ISLNK(mode)) { 95 inode->i_op = &gfs2_symlink_iops; 96 } else { 97 inode->i_op = &gfs2_file_iops; 98 init_special_inode(inode, inode->i_mode, inode->i_rdev); 99 } 100 } 101 102 /** 103 * gfs2_inode_lookup - Lookup an inode 104 * @sb: The super block 105 * @type: The type of the inode 106 * @no_addr: The inode number 107 * @no_formal_ino: The inode generation number 108 * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; 109 * GFS2_BLKST_FREE to indicate not to verify) 110 * 111 * If @type is DT_UNKNOWN, the inode type is fetched from disk. 112 * 113 * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a 114 * placeholder because it doesn't otherwise make sense), the on-disk block type 115 * is verified to be @blktype. 116 * 117 * Returns: A VFS inode, or an error 118 */ 119 120 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 121 u64 no_addr, u64 no_formal_ino, 122 unsigned int blktype) 123 { 124 struct inode *inode; 125 struct gfs2_inode *ip; 126 struct gfs2_glock *io_gl = NULL; 127 struct gfs2_holder i_gh; 128 int error; 129 130 gfs2_holder_mark_uninitialized(&i_gh); 131 inode = gfs2_iget(sb, no_addr); 132 if (!inode) 133 return ERR_PTR(-ENOMEM); 134 135 ip = GFS2_I(inode); 136 137 if (inode->i_state & I_NEW) { 138 struct gfs2_sbd *sdp = GFS2_SB(inode); 139 ip->i_no_formal_ino = no_formal_ino; 140 141 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 142 if (unlikely(error)) 143 goto fail; 144 flush_delayed_work(&ip->i_gl->gl_work); 145 146 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 147 if (unlikely(error)) 148 goto fail_put; 149 150 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { 151 /* 152 * The GL_SKIP flag indicates to skip reading the inode 153 * block. We read the inode with gfs2_inode_refresh 154 * after possibly checking the block type. 155 */ 156 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 157 GL_SKIP, &i_gh); 158 if (error) 159 goto fail_put; 160 161 if (blktype != GFS2_BLKST_FREE) { 162 error = gfs2_check_blk_type(sdp, no_addr, 163 blktype); 164 if (error) 165 goto fail_put; 166 } 167 } 168 169 glock_set_object(ip->i_gl, ip); 170 set_bit(GIF_INVALID, &ip->i_flags); 171 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 172 if (unlikely(error)) 173 goto fail_put; 174 glock_set_object(ip->i_iopen_gh.gh_gl, ip); 175 gfs2_glock_put(io_gl); 176 io_gl = NULL; 177 178 if (type == DT_UNKNOWN) { 179 /* Inode glock must be locked already */ 180 error = gfs2_inode_refresh(GFS2_I(inode)); 181 if (error) 182 goto fail_refresh; 183 } else { 184 inode->i_mode = DT2IF(type); 185 } 186 187 gfs2_set_iop(inode); 188 189 /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ 190 inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); 191 inode->i_atime.tv_nsec = 0; 192 193 unlock_new_inode(inode); 194 } 195 196 if (gfs2_holder_initialized(&i_gh)) 197 gfs2_glock_dq_uninit(&i_gh); 198 return inode; 199 200 fail_refresh: 201 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 202 glock_clear_object(ip->i_iopen_gh.gh_gl, ip); 203 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 204 fail_put: 205 if (io_gl) 206 gfs2_glock_put(io_gl); 207 glock_clear_object(ip->i_gl, ip); 208 if (gfs2_holder_initialized(&i_gh)) 209 gfs2_glock_dq_uninit(&i_gh); 210 fail: 211 iget_failed(inode); 212 return ERR_PTR(error); 213 } 214 215 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 216 u64 *no_formal_ino, unsigned int blktype) 217 { 218 struct super_block *sb = sdp->sd_vfs; 219 struct inode *inode; 220 int error; 221 222 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype); 223 if (IS_ERR(inode)) 224 return inode; 225 226 /* Two extra checks for NFS only */ 227 if (no_formal_ino) { 228 error = -ESTALE; 229 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) 230 goto fail_iput; 231 232 error = -EIO; 233 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 234 goto fail_iput; 235 } 236 return inode; 237 238 fail_iput: 239 iput(inode); 240 return ERR_PTR(error); 241 } 242 243 244 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 245 { 246 struct qstr qstr; 247 struct inode *inode; 248 gfs2_str2qstr(&qstr, name); 249 inode = gfs2_lookupi(dip, &qstr, 1); 250 /* gfs2_lookupi has inconsistent callers: vfs 251 * related routines expect NULL for no entry found, 252 * gfs2_lookup_simple callers expect ENOENT 253 * and do not check for NULL. 254 */ 255 if (inode == NULL) 256 return ERR_PTR(-ENOENT); 257 else 258 return inode; 259 } 260 261 262 /** 263 * gfs2_lookupi - Look up a filename in a directory and return its inode 264 * @d_gh: An initialized holder for the directory glock 265 * @name: The name of the inode to look for 266 * @is_root: If 1, ignore the caller's permissions 267 * @i_gh: An uninitialized holder for the new inode glock 268 * 269 * This can be called via the VFS filldir function when NFS is doing 270 * a readdirplus and the inode which its intending to stat isn't 271 * already in cache. In this case we must not take the directory glock 272 * again, since the readdir call will have already taken that lock. 273 * 274 * Returns: errno 275 */ 276 277 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 278 int is_root) 279 { 280 struct super_block *sb = dir->i_sb; 281 struct gfs2_inode *dip = GFS2_I(dir); 282 struct gfs2_holder d_gh; 283 int error = 0; 284 struct inode *inode = NULL; 285 286 gfs2_holder_mark_uninitialized(&d_gh); 287 if (!name->len || name->len > GFS2_FNAMESIZE) 288 return ERR_PTR(-ENAMETOOLONG); 289 290 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 291 (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 292 dir == d_inode(sb->s_root))) { 293 igrab(dir); 294 return dir; 295 } 296 297 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 298 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 299 if (error) 300 return ERR_PTR(error); 301 } 302 303 if (!is_root) { 304 error = gfs2_permission(dir, MAY_EXEC); 305 if (error) 306 goto out; 307 } 308 309 inode = gfs2_dir_search(dir, name, false); 310 if (IS_ERR(inode)) 311 error = PTR_ERR(inode); 312 out: 313 if (gfs2_holder_initialized(&d_gh)) 314 gfs2_glock_dq_uninit(&d_gh); 315 if (error == -ENOENT) 316 return NULL; 317 return inode ? inode : ERR_PTR(error); 318 } 319 320 /** 321 * create_ok - OK to create a new on-disk inode here? 322 * @dip: Directory in which dinode is to be created 323 * @name: Name of new dinode 324 * @mode: 325 * 326 * Returns: errno 327 */ 328 329 static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 330 umode_t mode) 331 { 332 int error; 333 334 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 335 if (error) 336 return error; 337 338 /* Don't create entries in an unlinked directory */ 339 if (!dip->i_inode.i_nlink) 340 return -ENOENT; 341 342 if (dip->i_entries == (u32)-1) 343 return -EFBIG; 344 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 345 return -EMLINK; 346 347 return 0; 348 } 349 350 static void munge_mode_uid_gid(const struct gfs2_inode *dip, 351 struct inode *inode) 352 { 353 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 354 (dip->i_inode.i_mode & S_ISUID) && 355 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 356 if (S_ISDIR(inode->i_mode)) 357 inode->i_mode |= S_ISUID; 358 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 359 inode->i_mode &= ~07111; 360 inode->i_uid = dip->i_inode.i_uid; 361 } else 362 inode->i_uid = current_fsuid(); 363 364 if (dip->i_inode.i_mode & S_ISGID) { 365 if (S_ISDIR(inode->i_mode)) 366 inode->i_mode |= S_ISGID; 367 inode->i_gid = dip->i_inode.i_gid; 368 } else 369 inode->i_gid = current_fsgid(); 370 } 371 372 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 373 { 374 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 375 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 376 int error; 377 378 error = gfs2_quota_lock_check(ip, &ap); 379 if (error) 380 goto out; 381 382 error = gfs2_inplace_reserve(ip, &ap); 383 if (error) 384 goto out_quota; 385 386 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 387 if (error) 388 goto out_ipreserv; 389 390 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 391 ip->i_no_formal_ino = ip->i_generation; 392 ip->i_inode.i_ino = ip->i_no_addr; 393 ip->i_goal = ip->i_no_addr; 394 395 gfs2_trans_end(sdp); 396 397 out_ipreserv: 398 gfs2_inplace_release(ip); 399 out_quota: 400 gfs2_quota_unlock(ip); 401 out: 402 return error; 403 } 404 405 static void gfs2_init_dir(struct buffer_head *dibh, 406 const struct gfs2_inode *parent) 407 { 408 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 409 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 410 411 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 412 dent->de_inum = di->di_num; /* already GFS2 endian */ 413 dent->de_type = cpu_to_be16(DT_DIR); 414 415 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 416 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 417 gfs2_inum_out(parent, dent); 418 dent->de_type = cpu_to_be16(DT_DIR); 419 420 } 421 422 /** 423 * gfs2_init_xattr - Initialise an xattr block for a new inode 424 * @ip: The inode in question 425 * 426 * This sets up an empty xattr block for a new inode, ready to 427 * take any ACLs, LSM xattrs, etc. 428 */ 429 430 static void gfs2_init_xattr(struct gfs2_inode *ip) 431 { 432 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 433 struct buffer_head *bh; 434 struct gfs2_ea_header *ea; 435 436 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 437 gfs2_trans_add_meta(ip->i_gl, bh); 438 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 439 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 440 441 ea = GFS2_EA_BH2FIRST(bh); 442 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 443 ea->ea_type = GFS2_EATYPE_UNUSED; 444 ea->ea_flags = GFS2_EAFLAG_LAST; 445 446 brelse(bh); 447 } 448 449 /** 450 * init_dinode - Fill in a new dinode structure 451 * @dip: The directory this inode is being created in 452 * @ip: The inode 453 * @symname: The symlink destination (if a symlink) 454 * @bhp: The buffer head (returned to caller) 455 * 456 */ 457 458 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 459 const char *symname) 460 { 461 struct gfs2_dinode *di; 462 struct buffer_head *dibh; 463 464 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 465 gfs2_trans_add_meta(ip->i_gl, dibh); 466 di = (struct gfs2_dinode *)dibh->b_data; 467 gfs2_dinode_out(ip, di); 468 469 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); 470 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); 471 di->__pad1 = 0; 472 di->__pad2 = 0; 473 di->__pad3 = 0; 474 memset(&di->__pad4, 0, sizeof(di->__pad4)); 475 memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 476 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 477 478 switch(ip->i_inode.i_mode & S_IFMT) { 479 case S_IFDIR: 480 gfs2_init_dir(dibh, dip); 481 break; 482 case S_IFLNK: 483 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 484 break; 485 } 486 487 set_buffer_uptodate(dibh); 488 brelse(dibh); 489 } 490 491 /** 492 * gfs2_trans_da_blocks - Calculate number of blocks to link inode 493 * @dip: The directory we are linking into 494 * @da: The dir add information 495 * @nr_inodes: The number of inodes involved 496 * 497 * This calculate the number of blocks we need to reserve in a 498 * transaction to link @nr_inodes into a directory. In most cases 499 * @nr_inodes will be 2 (the directory plus the inode being linked in) 500 * but in case of rename, 4 may be required. 501 * 502 * Returns: Number of blocks 503 */ 504 505 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 506 const struct gfs2_diradd *da, 507 unsigned nr_inodes) 508 { 509 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 510 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 511 } 512 513 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 514 struct gfs2_inode *ip, struct gfs2_diradd *da) 515 { 516 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 517 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 518 int error; 519 520 if (da->nr_blocks) { 521 error = gfs2_quota_lock_check(dip, &ap); 522 if (error) 523 goto fail_quota_locks; 524 525 error = gfs2_inplace_reserve(dip, &ap); 526 if (error) 527 goto fail_quota_locks; 528 529 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 530 if (error) 531 goto fail_ipreserv; 532 } else { 533 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 534 if (error) 535 goto fail_quota_locks; 536 } 537 538 error = gfs2_dir_add(&dip->i_inode, name, ip, da); 539 540 gfs2_trans_end(sdp); 541 fail_ipreserv: 542 gfs2_inplace_release(dip); 543 fail_quota_locks: 544 gfs2_quota_unlock(dip); 545 return error; 546 } 547 548 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 549 void *fs_info) 550 { 551 const struct xattr *xattr; 552 int err = 0; 553 554 for (xattr = xattr_array; xattr->name != NULL; xattr++) { 555 err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 556 xattr->value_len, 0, 557 GFS2_EATYPE_SECURITY); 558 if (err < 0) 559 break; 560 } 561 return err; 562 } 563 564 /** 565 * gfs2_create_inode - Create a new inode 566 * @dir: The parent directory 567 * @dentry: The new dentry 568 * @file: If non-NULL, the file which is being opened 569 * @mode: The permissions on the new inode 570 * @dev: For device nodes, this is the device number 571 * @symname: For symlinks, this is the link destination 572 * @size: The initial size of the inode (ignored for directories) 573 * 574 * Returns: 0 on success, or error code 575 */ 576 577 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 578 struct file *file, 579 umode_t mode, dev_t dev, const char *symname, 580 unsigned int size, int excl) 581 { 582 const struct qstr *name = &dentry->d_name; 583 struct posix_acl *default_acl, *acl; 584 struct gfs2_holder ghs[2]; 585 struct inode *inode = NULL; 586 struct gfs2_inode *dip = GFS2_I(dir), *ip; 587 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 588 struct gfs2_glock *io_gl = NULL; 589 int error, free_vfs_inode = 1; 590 u32 aflags = 0; 591 unsigned blocks = 1; 592 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 593 594 if (!name->len || name->len > GFS2_FNAMESIZE) 595 return -ENAMETOOLONG; 596 597 error = gfs2_rsqa_alloc(dip); 598 if (error) 599 return error; 600 601 error = gfs2_rindex_update(sdp); 602 if (error) 603 return error; 604 605 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 606 if (error) 607 goto fail; 608 gfs2_holder_mark_uninitialized(ghs + 1); 609 610 error = create_ok(dip, name, mode); 611 if (error) 612 goto fail_gunlock; 613 614 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 615 error = PTR_ERR(inode); 616 if (!IS_ERR(inode)) { 617 if (S_ISDIR(inode->i_mode)) { 618 iput(inode); 619 inode = ERR_PTR(-EISDIR); 620 goto fail_gunlock; 621 } 622 d_instantiate(dentry, inode); 623 error = 0; 624 if (file) { 625 if (S_ISREG(inode->i_mode)) 626 error = finish_open(file, dentry, gfs2_open_common); 627 else 628 error = finish_no_open(file, NULL); 629 } 630 gfs2_glock_dq_uninit(ghs); 631 return error; 632 } else if (error != -ENOENT) { 633 goto fail_gunlock; 634 } 635 636 error = gfs2_diradd_alloc_required(dir, name, &da); 637 if (error < 0) 638 goto fail_gunlock; 639 640 inode = new_inode(sdp->sd_vfs); 641 error = -ENOMEM; 642 if (!inode) 643 goto fail_gunlock; 644 645 error = posix_acl_create(dir, &mode, &default_acl, &acl); 646 if (error) 647 goto fail_gunlock; 648 649 ip = GFS2_I(inode); 650 error = gfs2_rsqa_alloc(ip); 651 if (error) 652 goto fail_free_acls; 653 654 inode->i_mode = mode; 655 set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 656 inode->i_rdev = dev; 657 inode->i_size = size; 658 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 659 gfs2_set_inode_blocks(inode, 1); 660 munge_mode_uid_gid(dip, inode); 661 check_and_update_goal(dip); 662 ip->i_goal = dip->i_goal; 663 ip->i_diskflags = 0; 664 ip->i_eattr = 0; 665 ip->i_height = 0; 666 ip->i_depth = 0; 667 ip->i_entries = 0; 668 ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 669 670 switch(mode & S_IFMT) { 671 case S_IFREG: 672 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 673 gfs2_tune_get(sdp, gt_new_files_jdata)) 674 ip->i_diskflags |= GFS2_DIF_JDATA; 675 gfs2_set_aops(inode); 676 break; 677 case S_IFDIR: 678 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 679 ip->i_diskflags |= GFS2_DIF_JDATA; 680 ip->i_entries = 2; 681 break; 682 } 683 684 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 685 if (dip->i_diskflags & GFS2_DIF_SYSTEM) 686 ip->i_diskflags |= GFS2_DIF_SYSTEM; 687 688 gfs2_set_inode_flags(inode); 689 690 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 691 (dip->i_diskflags & GFS2_DIF_TOPDIR)) 692 aflags |= GFS2_AF_ORLOV; 693 694 if (default_acl || acl) 695 blocks++; 696 697 error = alloc_dinode(ip, aflags, &blocks); 698 if (error) 699 goto fail_free_inode; 700 701 gfs2_set_inode_blocks(inode, blocks); 702 703 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 704 if (error) 705 goto fail_free_inode; 706 flush_delayed_work(&ip->i_gl->gl_work); 707 glock_set_object(ip->i_gl, ip); 708 709 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 710 if (error) 711 goto fail_free_inode; 712 713 error = gfs2_trans_begin(sdp, blocks, 0); 714 if (error) 715 goto fail_gunlock2; 716 717 if (blocks > 1) { 718 ip->i_eattr = ip->i_no_addr + 1; 719 gfs2_init_xattr(ip); 720 } 721 init_dinode(dip, ip, symname); 722 gfs2_trans_end(sdp); 723 724 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 725 if (error) 726 goto fail_gunlock2; 727 728 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); 729 730 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 731 if (error) 732 goto fail_gunlock2; 733 734 glock_set_object(ip->i_iopen_gh.gh_gl, ip); 735 gfs2_glock_put(io_gl); 736 gfs2_set_iop(inode); 737 insert_inode_hash(inode); 738 739 free_vfs_inode = 0; /* After this point, the inode is no longer 740 considered free. Any failures need to undo 741 the gfs2 structures. */ 742 if (default_acl) { 743 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 744 if (error) 745 goto fail_gunlock3; 746 posix_acl_release(default_acl); 747 default_acl = NULL; 748 } 749 if (acl) { 750 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 751 if (error) 752 goto fail_gunlock3; 753 posix_acl_release(acl); 754 acl = NULL; 755 } 756 757 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 758 &gfs2_initxattrs, NULL); 759 if (error) 760 goto fail_gunlock3; 761 762 error = link_dinode(dip, name, ip, &da); 763 if (error) 764 goto fail_gunlock3; 765 766 mark_inode_dirty(inode); 767 d_instantiate(dentry, inode); 768 if (file) { 769 file->f_mode |= FMODE_CREATED; 770 error = finish_open(file, dentry, gfs2_open_common); 771 } 772 gfs2_glock_dq_uninit(ghs); 773 gfs2_glock_dq_uninit(ghs + 1); 774 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); 775 return error; 776 777 fail_gunlock3: 778 glock_clear_object(io_gl, ip); 779 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 780 gfs2_glock_put(io_gl); 781 fail_gunlock2: 782 if (io_gl) 783 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); 784 fail_free_inode: 785 if (ip->i_gl) { 786 glock_clear_object(ip->i_gl, ip); 787 gfs2_glock_put(ip->i_gl); 788 } 789 gfs2_rsqa_delete(ip, NULL); 790 fail_free_acls: 791 posix_acl_release(default_acl); 792 posix_acl_release(acl); 793 fail_gunlock: 794 gfs2_dir_no_add(&da); 795 gfs2_glock_dq_uninit(ghs); 796 if (!IS_ERR_OR_NULL(inode)) { 797 clear_nlink(inode); 798 if (!free_vfs_inode) 799 mark_inode_dirty(inode); 800 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, 801 &GFS2_I(inode)->i_flags); 802 iput(inode); 803 } 804 if (gfs2_holder_initialized(ghs + 1)) 805 gfs2_glock_dq_uninit(ghs + 1); 806 fail: 807 return error; 808 } 809 810 /** 811 * gfs2_create - Create a file 812 * @dir: The directory in which to create the file 813 * @dentry: The dentry of the new file 814 * @mode: The mode of the new file 815 * 816 * Returns: errno 817 */ 818 819 static int gfs2_create(struct inode *dir, struct dentry *dentry, 820 umode_t mode, bool excl) 821 { 822 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); 823 } 824 825 /** 826 * __gfs2_lookup - Look up a filename in a directory and return its inode 827 * @dir: The directory inode 828 * @dentry: The dentry of the new inode 829 * @file: File to be opened 830 * 831 * 832 * Returns: errno 833 */ 834 835 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 836 struct file *file) 837 { 838 struct inode *inode; 839 struct dentry *d; 840 struct gfs2_holder gh; 841 struct gfs2_glock *gl; 842 int error; 843 844 inode = gfs2_lookupi(dir, &dentry->d_name, 0); 845 if (inode == NULL) { 846 d_add(dentry, NULL); 847 return NULL; 848 } 849 if (IS_ERR(inode)) 850 return ERR_CAST(inode); 851 852 gl = GFS2_I(inode)->i_gl; 853 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 854 if (error) { 855 iput(inode); 856 return ERR_PTR(error); 857 } 858 859 d = d_splice_alias(inode, dentry); 860 if (IS_ERR(d)) { 861 gfs2_glock_dq_uninit(&gh); 862 return d; 863 } 864 if (file && S_ISREG(inode->i_mode)) 865 error = finish_open(file, dentry, gfs2_open_common); 866 867 gfs2_glock_dq_uninit(&gh); 868 if (error) { 869 dput(d); 870 return ERR_PTR(error); 871 } 872 return d; 873 } 874 875 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 876 unsigned flags) 877 { 878 return __gfs2_lookup(dir, dentry, NULL); 879 } 880 881 /** 882 * gfs2_link - Link to a file 883 * @old_dentry: The inode to link 884 * @dir: Add link to this directory 885 * @dentry: The name of the link 886 * 887 * Link the inode in "old_dentry" into the directory "dir" with the 888 * name in "dentry". 889 * 890 * Returns: errno 891 */ 892 893 static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 894 struct dentry *dentry) 895 { 896 struct gfs2_inode *dip = GFS2_I(dir); 897 struct gfs2_sbd *sdp = GFS2_SB(dir); 898 struct inode *inode = d_inode(old_dentry); 899 struct gfs2_inode *ip = GFS2_I(inode); 900 struct gfs2_holder ghs[2]; 901 struct buffer_head *dibh; 902 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 903 int error; 904 905 if (S_ISDIR(inode->i_mode)) 906 return -EPERM; 907 908 error = gfs2_rsqa_alloc(dip); 909 if (error) 910 return error; 911 912 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 913 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 914 915 error = gfs2_glock_nq(ghs); /* parent */ 916 if (error) 917 goto out_parent; 918 919 error = gfs2_glock_nq(ghs + 1); /* child */ 920 if (error) 921 goto out_child; 922 923 error = -ENOENT; 924 if (inode->i_nlink == 0) 925 goto out_gunlock; 926 927 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 928 if (error) 929 goto out_gunlock; 930 931 error = gfs2_dir_check(dir, &dentry->d_name, NULL); 932 switch (error) { 933 case -ENOENT: 934 break; 935 case 0: 936 error = -EEXIST; 937 default: 938 goto out_gunlock; 939 } 940 941 error = -EINVAL; 942 if (!dip->i_inode.i_nlink) 943 goto out_gunlock; 944 error = -EFBIG; 945 if (dip->i_entries == (u32)-1) 946 goto out_gunlock; 947 error = -EPERM; 948 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 949 goto out_gunlock; 950 error = -EINVAL; 951 if (!ip->i_inode.i_nlink) 952 goto out_gunlock; 953 error = -EMLINK; 954 if (ip->i_inode.i_nlink == (u32)-1) 955 goto out_gunlock; 956 957 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 958 if (error < 0) 959 goto out_gunlock; 960 961 if (da.nr_blocks) { 962 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 963 error = gfs2_quota_lock_check(dip, &ap); 964 if (error) 965 goto out_gunlock; 966 967 error = gfs2_inplace_reserve(dip, &ap); 968 if (error) 969 goto out_gunlock_q; 970 971 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 972 if (error) 973 goto out_ipres; 974 } else { 975 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 976 if (error) 977 goto out_ipres; 978 } 979 980 error = gfs2_meta_inode_buffer(ip, &dibh); 981 if (error) 982 goto out_end_trans; 983 984 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 985 if (error) 986 goto out_brelse; 987 988 gfs2_trans_add_meta(ip->i_gl, dibh); 989 inc_nlink(&ip->i_inode); 990 ip->i_inode.i_ctime = current_time(&ip->i_inode); 991 ihold(inode); 992 d_instantiate(dentry, inode); 993 mark_inode_dirty(inode); 994 995 out_brelse: 996 brelse(dibh); 997 out_end_trans: 998 gfs2_trans_end(sdp); 999 out_ipres: 1000 if (da.nr_blocks) 1001 gfs2_inplace_release(dip); 1002 out_gunlock_q: 1003 if (da.nr_blocks) 1004 gfs2_quota_unlock(dip); 1005 out_gunlock: 1006 gfs2_dir_no_add(&da); 1007 gfs2_glock_dq(ghs + 1); 1008 out_child: 1009 gfs2_glock_dq(ghs); 1010 out_parent: 1011 gfs2_holder_uninit(ghs); 1012 gfs2_holder_uninit(ghs + 1); 1013 return error; 1014 } 1015 1016 /* 1017 * gfs2_unlink_ok - check to see that a inode is still in a directory 1018 * @dip: the directory 1019 * @name: the name of the file 1020 * @ip: the inode 1021 * 1022 * Assumes that the lock on (at least) @dip is held. 1023 * 1024 * Returns: 0 if the parent/child relationship is correct, errno if it isn't 1025 */ 1026 1027 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 1028 const struct gfs2_inode *ip) 1029 { 1030 int error; 1031 1032 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 1033 return -EPERM; 1034 1035 if ((dip->i_inode.i_mode & S_ISVTX) && 1036 !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 1037 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 1038 return -EPERM; 1039 1040 if (IS_APPEND(&dip->i_inode)) 1041 return -EPERM; 1042 1043 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 1044 if (error) 1045 return error; 1046 1047 return gfs2_dir_check(&dip->i_inode, name, ip); 1048 } 1049 1050 /** 1051 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 1052 * @dip: The parent directory 1053 * @name: The name of the entry in the parent directory 1054 * @inode: The inode to be removed 1055 * 1056 * Called with all the locks and in a transaction. This will only be 1057 * called for a directory after it has been checked to ensure it is empty. 1058 * 1059 * Returns: 0 on success, or an error 1060 */ 1061 1062 static int gfs2_unlink_inode(struct gfs2_inode *dip, 1063 const struct dentry *dentry) 1064 { 1065 struct inode *inode = d_inode(dentry); 1066 struct gfs2_inode *ip = GFS2_I(inode); 1067 int error; 1068 1069 error = gfs2_dir_del(dip, dentry); 1070 if (error) 1071 return error; 1072 1073 ip->i_entries = 0; 1074 inode->i_ctime = current_time(inode); 1075 if (S_ISDIR(inode->i_mode)) 1076 clear_nlink(inode); 1077 else 1078 drop_nlink(inode); 1079 mark_inode_dirty(inode); 1080 if (inode->i_nlink == 0) 1081 gfs2_unlink_di(inode); 1082 return 0; 1083 } 1084 1085 1086 /** 1087 * gfs2_unlink - Unlink an inode (this does rmdir as well) 1088 * @dir: The inode of the directory containing the inode to unlink 1089 * @dentry: The file itself 1090 * 1091 * This routine uses the type of the inode as a flag to figure out 1092 * whether this is an unlink or an rmdir. 1093 * 1094 * Returns: errno 1095 */ 1096 1097 static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 1098 { 1099 struct gfs2_inode *dip = GFS2_I(dir); 1100 struct gfs2_sbd *sdp = GFS2_SB(dir); 1101 struct inode *inode = d_inode(dentry); 1102 struct gfs2_inode *ip = GFS2_I(inode); 1103 struct gfs2_holder ghs[3]; 1104 struct gfs2_rgrpd *rgd; 1105 int error; 1106 1107 error = gfs2_rindex_update(sdp); 1108 if (error) 1109 return error; 1110 1111 error = -EROFS; 1112 1113 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 1114 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 1115 1116 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1117 if (!rgd) 1118 goto out_inodes; 1119 1120 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 1121 1122 1123 error = gfs2_glock_nq(ghs); /* parent */ 1124 if (error) 1125 goto out_parent; 1126 1127 error = gfs2_glock_nq(ghs + 1); /* child */ 1128 if (error) 1129 goto out_child; 1130 1131 error = -ENOENT; 1132 if (inode->i_nlink == 0) 1133 goto out_rgrp; 1134 1135 if (S_ISDIR(inode->i_mode)) { 1136 error = -ENOTEMPTY; 1137 if (ip->i_entries > 2 || inode->i_nlink > 2) 1138 goto out_rgrp; 1139 } 1140 1141 error = gfs2_glock_nq(ghs + 2); /* rgrp */ 1142 if (error) 1143 goto out_rgrp; 1144 1145 error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 1146 if (error) 1147 goto out_gunlock; 1148 1149 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 1150 if (error) 1151 goto out_gunlock; 1152 1153 error = gfs2_unlink_inode(dip, dentry); 1154 gfs2_trans_end(sdp); 1155 1156 out_gunlock: 1157 gfs2_glock_dq(ghs + 2); 1158 out_rgrp: 1159 gfs2_glock_dq(ghs + 1); 1160 out_child: 1161 gfs2_glock_dq(ghs); 1162 out_parent: 1163 gfs2_holder_uninit(ghs + 2); 1164 out_inodes: 1165 gfs2_holder_uninit(ghs + 1); 1166 gfs2_holder_uninit(ghs); 1167 return error; 1168 } 1169 1170 /** 1171 * gfs2_symlink - Create a symlink 1172 * @dir: The directory to create the symlink in 1173 * @dentry: The dentry to put the symlink in 1174 * @symname: The thing which the link points to 1175 * 1176 * Returns: errno 1177 */ 1178 1179 static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 1180 const char *symname) 1181 { 1182 unsigned int size; 1183 1184 size = strlen(symname); 1185 if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) 1186 return -ENAMETOOLONG; 1187 1188 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 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 unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); 1203 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); 1204 } 1205 1206 /** 1207 * gfs2_mknod - Make a special file 1208 * @dir: The directory in which the special file will reside 1209 * @dentry: The dentry of the special file 1210 * @mode: The mode of the special file 1211 * @dev: The device specification of the special file 1212 * 1213 */ 1214 1215 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 1216 dev_t dev) 1217 { 1218 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); 1219 } 1220 1221 /** 1222 * gfs2_atomic_open - Atomically open a file 1223 * @dir: The directory 1224 * @dentry: The proposed new entry 1225 * @file: The proposed new struct file 1226 * @flags: open flags 1227 * @mode: File mode 1228 * 1229 * Returns: error code or 0 for success 1230 */ 1231 1232 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 1233 struct file *file, unsigned flags, 1234 umode_t mode) 1235 { 1236 struct dentry *d; 1237 bool excl = !!(flags & O_EXCL); 1238 1239 if (!d_in_lookup(dentry)) 1240 goto skip_lookup; 1241 1242 d = __gfs2_lookup(dir, dentry, file); 1243 if (IS_ERR(d)) 1244 return PTR_ERR(d); 1245 if (d != NULL) 1246 dentry = d; 1247 if (d_really_is_positive(dentry)) { 1248 if (!(file->f_mode & FMODE_OPENED)) 1249 return finish_no_open(file, d); 1250 dput(d); 1251 return 0; 1252 } 1253 1254 BUG_ON(d != NULL); 1255 1256 skip_lookup: 1257 if (!(flags & O_CREAT)) 1258 return -ENOENT; 1259 1260 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); 1261 } 1262 1263 /* 1264 * gfs2_ok_to_move - check if it's ok to move a directory to another directory 1265 * @this: move this 1266 * @to: to here 1267 * 1268 * Follow @to back to the root and make sure we don't encounter @this 1269 * Assumes we already hold the rename lock. 1270 * 1271 * Returns: errno 1272 */ 1273 1274 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 1275 { 1276 struct inode *dir = &to->i_inode; 1277 struct super_block *sb = dir->i_sb; 1278 struct inode *tmp; 1279 int error = 0; 1280 1281 igrab(dir); 1282 1283 for (;;) { 1284 if (dir == &this->i_inode) { 1285 error = -EINVAL; 1286 break; 1287 } 1288 if (dir == d_inode(sb->s_root)) { 1289 error = 0; 1290 break; 1291 } 1292 1293 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 1294 if (!tmp) { 1295 error = -ENOENT; 1296 break; 1297 } 1298 if (IS_ERR(tmp)) { 1299 error = PTR_ERR(tmp); 1300 break; 1301 } 1302 1303 iput(dir); 1304 dir = tmp; 1305 } 1306 1307 iput(dir); 1308 1309 return error; 1310 } 1311 1312 /** 1313 * update_moved_ino - Update an inode that's being moved 1314 * @ip: The inode being moved 1315 * @ndip: The parent directory of the new filename 1316 * @dir_rename: True of ip is a directory 1317 * 1318 * Returns: errno 1319 */ 1320 1321 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1322 int dir_rename) 1323 { 1324 if (dir_rename) 1325 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1326 1327 ip->i_inode.i_ctime = current_time(&ip->i_inode); 1328 mark_inode_dirty_sync(&ip->i_inode); 1329 return 0; 1330 } 1331 1332 1333 /** 1334 * gfs2_rename - Rename a file 1335 * @odir: Parent directory of old file name 1336 * @odentry: The old dentry of the file 1337 * @ndir: Parent directory of new file name 1338 * @ndentry: The new dentry of the file 1339 * 1340 * Returns: errno 1341 */ 1342 1343 static int gfs2_rename(struct inode *odir, struct dentry *odentry, 1344 struct inode *ndir, struct dentry *ndentry) 1345 { 1346 struct gfs2_inode *odip = GFS2_I(odir); 1347 struct gfs2_inode *ndip = GFS2_I(ndir); 1348 struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 1349 struct gfs2_inode *nip = NULL; 1350 struct gfs2_sbd *sdp = GFS2_SB(odir); 1351 struct gfs2_holder ghs[5], r_gh; 1352 struct gfs2_rgrpd *nrgd; 1353 unsigned int num_gh; 1354 int dir_rename = 0; 1355 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 1356 unsigned int x; 1357 int error; 1358 1359 gfs2_holder_mark_uninitialized(&r_gh); 1360 if (d_really_is_positive(ndentry)) { 1361 nip = GFS2_I(d_inode(ndentry)); 1362 if (ip == nip) 1363 return 0; 1364 } 1365 1366 error = gfs2_rindex_update(sdp); 1367 if (error) 1368 return error; 1369 1370 error = gfs2_rsqa_alloc(ndip); 1371 if (error) 1372 return error; 1373 1374 if (odip != ndip) { 1375 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1376 0, &r_gh); 1377 if (error) 1378 goto out; 1379 1380 if (S_ISDIR(ip->i_inode.i_mode)) { 1381 dir_rename = 1; 1382 /* don't move a directory into its subdir */ 1383 error = gfs2_ok_to_move(ip, ndip); 1384 if (error) 1385 goto out_gunlock_r; 1386 } 1387 } 1388 1389 num_gh = 1; 1390 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 1391 if (odip != ndip) { 1392 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1393 num_gh++; 1394 } 1395 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1396 num_gh++; 1397 1398 if (nip) { 1399 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1400 num_gh++; 1401 /* grab the resource lock for unlink flag twiddling 1402 * this is the case of the target file already existing 1403 * so we unlink before doing the rename 1404 */ 1405 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1406 if (nrgd) 1407 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); 1408 } 1409 1410 for (x = 0; x < num_gh; x++) { 1411 error = gfs2_glock_nq(ghs + x); 1412 if (error) 1413 goto out_gunlock; 1414 } 1415 1416 error = -ENOENT; 1417 if (ip->i_inode.i_nlink == 0) 1418 goto out_gunlock; 1419 1420 /* Check out the old directory */ 1421 1422 error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 1423 if (error) 1424 goto out_gunlock; 1425 1426 /* Check out the new directory */ 1427 1428 if (nip) { 1429 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1430 if (error) 1431 goto out_gunlock; 1432 1433 if (nip->i_inode.i_nlink == 0) { 1434 error = -EAGAIN; 1435 goto out_gunlock; 1436 } 1437 1438 if (S_ISDIR(nip->i_inode.i_mode)) { 1439 if (nip->i_entries < 2) { 1440 gfs2_consist_inode(nip); 1441 error = -EIO; 1442 goto out_gunlock; 1443 } 1444 if (nip->i_entries > 2) { 1445 error = -ENOTEMPTY; 1446 goto out_gunlock; 1447 } 1448 } 1449 } else { 1450 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 1451 if (error) 1452 goto out_gunlock; 1453 1454 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 1455 switch (error) { 1456 case -ENOENT: 1457 error = 0; 1458 break; 1459 case 0: 1460 error = -EEXIST; 1461 default: 1462 goto out_gunlock; 1463 }; 1464 1465 if (odip != ndip) { 1466 if (!ndip->i_inode.i_nlink) { 1467 error = -ENOENT; 1468 goto out_gunlock; 1469 } 1470 if (ndip->i_entries == (u32)-1) { 1471 error = -EFBIG; 1472 goto out_gunlock; 1473 } 1474 if (S_ISDIR(ip->i_inode.i_mode) && 1475 ndip->i_inode.i_nlink == (u32)-1) { 1476 error = -EMLINK; 1477 goto out_gunlock; 1478 } 1479 } 1480 } 1481 1482 /* Check out the dir to be renamed */ 1483 1484 if (dir_rename) { 1485 error = gfs2_permission(d_inode(odentry), MAY_WRITE); 1486 if (error) 1487 goto out_gunlock; 1488 } 1489 1490 if (nip == NULL) { 1491 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 1492 if (error) 1493 goto out_gunlock; 1494 } 1495 1496 if (da.nr_blocks) { 1497 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1498 error = gfs2_quota_lock_check(ndip, &ap); 1499 if (error) 1500 goto out_gunlock; 1501 1502 error = gfs2_inplace_reserve(ndip, &ap); 1503 if (error) 1504 goto out_gunlock_q; 1505 1506 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1507 4 * RES_LEAF + 4, 0); 1508 if (error) 1509 goto out_ipreserv; 1510 } else { 1511 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 1512 5 * RES_LEAF + 4, 0); 1513 if (error) 1514 goto out_gunlock; 1515 } 1516 1517 /* Remove the target file, if it exists */ 1518 1519 if (nip) 1520 error = gfs2_unlink_inode(ndip, ndentry); 1521 1522 error = update_moved_ino(ip, ndip, dir_rename); 1523 if (error) 1524 goto out_end_trans; 1525 1526 error = gfs2_dir_del(odip, odentry); 1527 if (error) 1528 goto out_end_trans; 1529 1530 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 1531 if (error) 1532 goto out_end_trans; 1533 1534 out_end_trans: 1535 gfs2_trans_end(sdp); 1536 out_ipreserv: 1537 if (da.nr_blocks) 1538 gfs2_inplace_release(ndip); 1539 out_gunlock_q: 1540 if (da.nr_blocks) 1541 gfs2_quota_unlock(ndip); 1542 out_gunlock: 1543 gfs2_dir_no_add(&da); 1544 while (x--) { 1545 gfs2_glock_dq(ghs + x); 1546 gfs2_holder_uninit(ghs + x); 1547 } 1548 out_gunlock_r: 1549 if (gfs2_holder_initialized(&r_gh)) 1550 gfs2_glock_dq_uninit(&r_gh); 1551 out: 1552 return error; 1553 } 1554 1555 /** 1556 * gfs2_exchange - exchange two files 1557 * @odir: Parent directory of old file name 1558 * @odentry: The old dentry of the file 1559 * @ndir: Parent directory of new file name 1560 * @ndentry: The new dentry of the file 1561 * @flags: The rename flags 1562 * 1563 * Returns: errno 1564 */ 1565 1566 static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1567 struct inode *ndir, struct dentry *ndentry, 1568 unsigned int flags) 1569 { 1570 struct gfs2_inode *odip = GFS2_I(odir); 1571 struct gfs2_inode *ndip = GFS2_I(ndir); 1572 struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1573 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1574 struct gfs2_sbd *sdp = GFS2_SB(odir); 1575 struct gfs2_holder ghs[5], r_gh; 1576 unsigned int num_gh; 1577 unsigned int x; 1578 umode_t old_mode = oip->i_inode.i_mode; 1579 umode_t new_mode = nip->i_inode.i_mode; 1580 int error; 1581 1582 gfs2_holder_mark_uninitialized(&r_gh); 1583 error = gfs2_rindex_update(sdp); 1584 if (error) 1585 return error; 1586 1587 if (odip != ndip) { 1588 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1589 0, &r_gh); 1590 if (error) 1591 goto out; 1592 1593 if (S_ISDIR(old_mode)) { 1594 /* don't move a directory into its subdir */ 1595 error = gfs2_ok_to_move(oip, ndip); 1596 if (error) 1597 goto out_gunlock_r; 1598 } 1599 1600 if (S_ISDIR(new_mode)) { 1601 /* don't move a directory into its subdir */ 1602 error = gfs2_ok_to_move(nip, odip); 1603 if (error) 1604 goto out_gunlock_r; 1605 } 1606 } 1607 1608 num_gh = 1; 1609 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 1610 if (odip != ndip) { 1611 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1612 num_gh++; 1613 } 1614 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1615 num_gh++; 1616 1617 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1618 num_gh++; 1619 1620 for (x = 0; x < num_gh; x++) { 1621 error = gfs2_glock_nq(ghs + x); 1622 if (error) 1623 goto out_gunlock; 1624 } 1625 1626 error = -ENOENT; 1627 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1628 goto out_gunlock; 1629 1630 error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1631 if (error) 1632 goto out_gunlock; 1633 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1634 if (error) 1635 goto out_gunlock; 1636 1637 if (S_ISDIR(old_mode)) { 1638 error = gfs2_permission(odentry->d_inode, MAY_WRITE); 1639 if (error) 1640 goto out_gunlock; 1641 } 1642 if (S_ISDIR(new_mode)) { 1643 error = gfs2_permission(ndentry->d_inode, MAY_WRITE); 1644 if (error) 1645 goto out_gunlock; 1646 } 1647 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1648 if (error) 1649 goto out_gunlock; 1650 1651 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1652 if (error) 1653 goto out_end_trans; 1654 1655 error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1656 if (error) 1657 goto out_end_trans; 1658 1659 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1660 IF2DT(old_mode)); 1661 if (error) 1662 goto out_end_trans; 1663 1664 error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1665 IF2DT(new_mode)); 1666 if (error) 1667 goto out_end_trans; 1668 1669 if (odip != ndip) { 1670 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1671 inc_nlink(&odip->i_inode); 1672 drop_nlink(&ndip->i_inode); 1673 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1674 inc_nlink(&ndip->i_inode); 1675 drop_nlink(&odip->i_inode); 1676 } 1677 } 1678 mark_inode_dirty(&ndip->i_inode); 1679 if (odip != ndip) 1680 mark_inode_dirty(&odip->i_inode); 1681 1682 out_end_trans: 1683 gfs2_trans_end(sdp); 1684 out_gunlock: 1685 while (x--) { 1686 gfs2_glock_dq(ghs + x); 1687 gfs2_holder_uninit(ghs + x); 1688 } 1689 out_gunlock_r: 1690 if (gfs2_holder_initialized(&r_gh)) 1691 gfs2_glock_dq_uninit(&r_gh); 1692 out: 1693 return error; 1694 } 1695 1696 static int gfs2_rename2(struct inode *odir, struct dentry *odentry, 1697 struct inode *ndir, struct dentry *ndentry, 1698 unsigned int flags) 1699 { 1700 flags &= ~RENAME_NOREPLACE; 1701 1702 if (flags & ~RENAME_EXCHANGE) 1703 return -EINVAL; 1704 1705 if (flags & RENAME_EXCHANGE) 1706 return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1707 1708 return gfs2_rename(odir, odentry, ndir, ndentry); 1709 } 1710 1711 /** 1712 * gfs2_get_link - Follow a symbolic link 1713 * @dentry: The dentry of the link 1714 * @inode: The inode of the link 1715 * @done: destructor for return value 1716 * 1717 * This can handle symlinks of any size. 1718 * 1719 * Returns: 0 on success or error code 1720 */ 1721 1722 static const char *gfs2_get_link(struct dentry *dentry, 1723 struct inode *inode, 1724 struct delayed_call *done) 1725 { 1726 struct gfs2_inode *ip = GFS2_I(inode); 1727 struct gfs2_holder i_gh; 1728 struct buffer_head *dibh; 1729 unsigned int size; 1730 char *buf; 1731 int error; 1732 1733 if (!dentry) 1734 return ERR_PTR(-ECHILD); 1735 1736 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 1737 error = gfs2_glock_nq(&i_gh); 1738 if (error) { 1739 gfs2_holder_uninit(&i_gh); 1740 return ERR_PTR(error); 1741 } 1742 1743 size = (unsigned int)i_size_read(&ip->i_inode); 1744 if (size == 0) { 1745 gfs2_consist_inode(ip); 1746 buf = ERR_PTR(-EIO); 1747 goto out; 1748 } 1749 1750 error = gfs2_meta_inode_buffer(ip, &dibh); 1751 if (error) { 1752 buf = ERR_PTR(error); 1753 goto out; 1754 } 1755 1756 buf = kzalloc(size + 1, GFP_NOFS); 1757 if (!buf) 1758 buf = ERR_PTR(-ENOMEM); 1759 else 1760 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 1761 brelse(dibh); 1762 out: 1763 gfs2_glock_dq_uninit(&i_gh); 1764 if (!IS_ERR(buf)) 1765 set_delayed_call(done, kfree_link, buf); 1766 return buf; 1767 } 1768 1769 /** 1770 * gfs2_permission - 1771 * @inode: The inode 1772 * @mask: The mask to be tested 1773 * @flags: Indicates whether this is an RCU path walk or not 1774 * 1775 * This may be called from the VFS directly, or from within GFS2 with the 1776 * inode locked, so we look to see if the glock is already locked and only 1777 * lock the glock if its not already been done. 1778 * 1779 * Returns: errno 1780 */ 1781 1782 int gfs2_permission(struct inode *inode, int mask) 1783 { 1784 struct gfs2_inode *ip; 1785 struct gfs2_holder i_gh; 1786 int error; 1787 1788 gfs2_holder_mark_uninitialized(&i_gh); 1789 ip = GFS2_I(inode); 1790 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 1791 if (mask & MAY_NOT_BLOCK) 1792 return -ECHILD; 1793 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 1794 if (error) 1795 return error; 1796 } 1797 1798 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1799 error = -EPERM; 1800 else 1801 error = generic_permission(inode, mask); 1802 if (gfs2_holder_initialized(&i_gh)) 1803 gfs2_glock_dq_uninit(&i_gh); 1804 1805 return error; 1806 } 1807 1808 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 1809 { 1810 setattr_copy(inode, attr); 1811 mark_inode_dirty(inode); 1812 return 0; 1813 } 1814 1815 /** 1816 * gfs2_setattr_simple - 1817 * @ip: 1818 * @attr: 1819 * 1820 * Returns: errno 1821 */ 1822 1823 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 1824 { 1825 int error; 1826 1827 if (current->journal_info) 1828 return __gfs2_setattr_simple(inode, attr); 1829 1830 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 1831 if (error) 1832 return error; 1833 1834 error = __gfs2_setattr_simple(inode, attr); 1835 gfs2_trans_end(GFS2_SB(inode)); 1836 return error; 1837 } 1838 1839 static int setattr_chown(struct inode *inode, struct iattr *attr) 1840 { 1841 struct gfs2_inode *ip = GFS2_I(inode); 1842 struct gfs2_sbd *sdp = GFS2_SB(inode); 1843 kuid_t ouid, nuid; 1844 kgid_t ogid, ngid; 1845 int error; 1846 struct gfs2_alloc_parms ap; 1847 1848 ouid = inode->i_uid; 1849 ogid = inode->i_gid; 1850 nuid = attr->ia_uid; 1851 ngid = attr->ia_gid; 1852 1853 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1854 ouid = nuid = NO_UID_QUOTA_CHANGE; 1855 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1856 ogid = ngid = NO_GID_QUOTA_CHANGE; 1857 1858 error = gfs2_rsqa_alloc(ip); 1859 if (error) 1860 goto out; 1861 1862 error = gfs2_rindex_update(sdp); 1863 if (error) 1864 goto out; 1865 1866 error = gfs2_quota_lock(ip, nuid, ngid); 1867 if (error) 1868 goto out; 1869 1870 ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1871 1872 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 1873 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1874 error = gfs2_quota_check(ip, nuid, ngid, &ap); 1875 if (error) 1876 goto out_gunlock_q; 1877 } 1878 1879 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 1880 if (error) 1881 goto out_gunlock_q; 1882 1883 error = gfs2_setattr_simple(inode, attr); 1884 if (error) 1885 goto out_end_trans; 1886 1887 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 1888 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1889 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1890 gfs2_quota_change(ip, ap.target, nuid, ngid); 1891 } 1892 1893 out_end_trans: 1894 gfs2_trans_end(sdp); 1895 out_gunlock_q: 1896 gfs2_quota_unlock(ip); 1897 out: 1898 return error; 1899 } 1900 1901 /** 1902 * gfs2_setattr - Change attributes on an inode 1903 * @dentry: The dentry which is changing 1904 * @attr: The structure describing the change 1905 * 1906 * The VFS layer wants to change one or more of an inodes attributes. Write 1907 * that change out to disk. 1908 * 1909 * Returns: errno 1910 */ 1911 1912 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 1913 { 1914 struct inode *inode = d_inode(dentry); 1915 struct gfs2_inode *ip = GFS2_I(inode); 1916 struct gfs2_holder i_gh; 1917 int error; 1918 1919 error = gfs2_rsqa_alloc(ip); 1920 if (error) 1921 return error; 1922 1923 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 1924 if (error) 1925 return error; 1926 1927 error = -EPERM; 1928 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 1929 goto out; 1930 1931 error = setattr_prepare(dentry, attr); 1932 if (error) 1933 goto out; 1934 1935 if (attr->ia_valid & ATTR_SIZE) 1936 error = gfs2_setattr_size(inode, attr->ia_size); 1937 else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 1938 error = setattr_chown(inode, attr); 1939 else { 1940 error = gfs2_setattr_simple(inode, attr); 1941 if (!error && attr->ia_valid & ATTR_MODE) 1942 error = posix_acl_chmod(inode, inode->i_mode); 1943 } 1944 1945 out: 1946 if (!error) 1947 mark_inode_dirty(inode); 1948 gfs2_glock_dq_uninit(&i_gh); 1949 return error; 1950 } 1951 1952 /** 1953 * gfs2_getattr - Read out an inode's attributes 1954 * @path: Object to query 1955 * @stat: The inode's stats 1956 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1957 * @flags: AT_STATX_xxx setting 1958 * 1959 * This may be called from the VFS directly, or from within GFS2 with the 1960 * inode locked, so we look to see if the glock is already locked and only 1961 * lock the glock if its not already been done. Note that its the NFS 1962 * readdirplus operation which causes this to be called (from filldir) 1963 * with the glock already held. 1964 * 1965 * Returns: errno 1966 */ 1967 1968 static int gfs2_getattr(const struct path *path, struct kstat *stat, 1969 u32 request_mask, unsigned int flags) 1970 { 1971 struct inode *inode = d_inode(path->dentry); 1972 struct gfs2_inode *ip = GFS2_I(inode); 1973 struct gfs2_holder gh; 1974 u32 gfsflags; 1975 int error; 1976 1977 gfs2_holder_mark_uninitialized(&gh); 1978 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 1979 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 1980 if (error) 1981 return error; 1982 } 1983 1984 gfsflags = ip->i_diskflags; 1985 if (gfsflags & GFS2_DIF_APPENDONLY) 1986 stat->attributes |= STATX_ATTR_APPEND; 1987 if (gfsflags & GFS2_DIF_IMMUTABLE) 1988 stat->attributes |= STATX_ATTR_IMMUTABLE; 1989 1990 stat->attributes_mask |= (STATX_ATTR_APPEND | 1991 STATX_ATTR_COMPRESSED | 1992 STATX_ATTR_ENCRYPTED | 1993 STATX_ATTR_IMMUTABLE | 1994 STATX_ATTR_NODUMP); 1995 1996 generic_fillattr(inode, stat); 1997 1998 if (gfs2_holder_initialized(&gh)) 1999 gfs2_glock_dq_uninit(&gh); 2000 2001 return 0; 2002 } 2003 2004 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 2005 u64 start, u64 len) 2006 { 2007 struct gfs2_inode *ip = GFS2_I(inode); 2008 struct gfs2_holder gh; 2009 int ret; 2010 2011 inode_lock_shared(inode); 2012 2013 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2014 if (ret) 2015 goto out; 2016 2017 ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 2018 2019 gfs2_glock_dq_uninit(&gh); 2020 2021 out: 2022 inode_unlock_shared(inode); 2023 return ret; 2024 } 2025 2026 loff_t gfs2_seek_data(struct file *file, loff_t offset) 2027 { 2028 struct inode *inode = file->f_mapping->host; 2029 struct gfs2_inode *ip = GFS2_I(inode); 2030 struct gfs2_holder gh; 2031 loff_t ret; 2032 2033 inode_lock_shared(inode); 2034 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2035 if (!ret) 2036 ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 2037 gfs2_glock_dq_uninit(&gh); 2038 inode_unlock_shared(inode); 2039 2040 if (ret < 0) 2041 return ret; 2042 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 2043 } 2044 2045 loff_t gfs2_seek_hole(struct file *file, loff_t offset) 2046 { 2047 struct inode *inode = file->f_mapping->host; 2048 struct gfs2_inode *ip = GFS2_I(inode); 2049 struct gfs2_holder gh; 2050 loff_t ret; 2051 2052 inode_lock_shared(inode); 2053 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2054 if (!ret) 2055 ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 2056 gfs2_glock_dq_uninit(&gh); 2057 inode_unlock_shared(inode); 2058 2059 if (ret < 0) 2060 return ret; 2061 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 2062 } 2063 2064 const struct inode_operations gfs2_file_iops = { 2065 .permission = gfs2_permission, 2066 .setattr = gfs2_setattr, 2067 .getattr = gfs2_getattr, 2068 .listxattr = gfs2_listxattr, 2069 .fiemap = gfs2_fiemap, 2070 .get_acl = gfs2_get_acl, 2071 .set_acl = gfs2_set_acl, 2072 }; 2073 2074 const struct inode_operations gfs2_dir_iops = { 2075 .create = gfs2_create, 2076 .lookup = gfs2_lookup, 2077 .link = gfs2_link, 2078 .unlink = gfs2_unlink, 2079 .symlink = gfs2_symlink, 2080 .mkdir = gfs2_mkdir, 2081 .rmdir = gfs2_unlink, 2082 .mknod = gfs2_mknod, 2083 .rename = gfs2_rename2, 2084 .permission = gfs2_permission, 2085 .setattr = gfs2_setattr, 2086 .getattr = gfs2_getattr, 2087 .listxattr = gfs2_listxattr, 2088 .fiemap = gfs2_fiemap, 2089 .get_acl = gfs2_get_acl, 2090 .set_acl = gfs2_set_acl, 2091 .atomic_open = gfs2_atomic_open, 2092 }; 2093 2094 const struct inode_operations gfs2_symlink_iops = { 2095 .get_link = gfs2_get_link, 2096 .permission = gfs2_permission, 2097 .setattr = gfs2_setattr, 2098 .getattr = gfs2_getattr, 2099 .listxattr = gfs2_listxattr, 2100 .fiemap = gfs2_fiemap, 2101 }; 2102 2103