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[4], r_gh, rd_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 gfs2_holder_mark_uninitialized(&rd_gh); 1361 if (d_really_is_positive(ndentry)) { 1362 nip = GFS2_I(d_inode(ndentry)); 1363 if (ip == nip) 1364 return 0; 1365 } 1366 1367 error = gfs2_rindex_update(sdp); 1368 if (error) 1369 return error; 1370 1371 error = gfs2_rsqa_alloc(ndip); 1372 if (error) 1373 return error; 1374 1375 if (odip != ndip) { 1376 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1377 0, &r_gh); 1378 if (error) 1379 goto out; 1380 1381 if (S_ISDIR(ip->i_inode.i_mode)) { 1382 dir_rename = 1; 1383 /* don't move a directory into its subdir */ 1384 error = gfs2_ok_to_move(ip, ndip); 1385 if (error) 1386 goto out_gunlock_r; 1387 } 1388 } 1389 1390 num_gh = 1; 1391 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 1392 if (odip != ndip) { 1393 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, 1394 ghs + num_gh); 1395 num_gh++; 1396 } 1397 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1398 num_gh++; 1399 1400 if (nip) { 1401 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1402 ghs + num_gh); 1403 num_gh++; 1404 } 1405 1406 for (x = 0; x < num_gh; x++) { 1407 error = gfs2_glock_nq(ghs + x); 1408 if (error) 1409 goto out_gunlock; 1410 } 1411 error = gfs2_glock_async_wait(num_gh, ghs); 1412 if (error) 1413 goto out_gunlock; 1414 1415 if (nip) { 1416 /* Grab the resource group glock for unlink flag twiddling. 1417 * This is the case where the target dinode already exists 1418 * so we unlink before doing the rename. 1419 */ 1420 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1421 if (!nrgd) { 1422 error = -ENOENT; 1423 goto out_gunlock; 1424 } 1425 error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, 1426 &rd_gh); 1427 if (error) 1428 goto out_gunlock; 1429 } 1430 1431 error = -ENOENT; 1432 if (ip->i_inode.i_nlink == 0) 1433 goto out_gunlock; 1434 1435 /* Check out the old directory */ 1436 1437 error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 1438 if (error) 1439 goto out_gunlock; 1440 1441 /* Check out the new directory */ 1442 1443 if (nip) { 1444 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1445 if (error) 1446 goto out_gunlock; 1447 1448 if (nip->i_inode.i_nlink == 0) { 1449 error = -EAGAIN; 1450 goto out_gunlock; 1451 } 1452 1453 if (S_ISDIR(nip->i_inode.i_mode)) { 1454 if (nip->i_entries < 2) { 1455 gfs2_consist_inode(nip); 1456 error = -EIO; 1457 goto out_gunlock; 1458 } 1459 if (nip->i_entries > 2) { 1460 error = -ENOTEMPTY; 1461 goto out_gunlock; 1462 } 1463 } 1464 } else { 1465 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 1466 if (error) 1467 goto out_gunlock; 1468 1469 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 1470 switch (error) { 1471 case -ENOENT: 1472 error = 0; 1473 break; 1474 case 0: 1475 error = -EEXIST; 1476 default: 1477 goto out_gunlock; 1478 }; 1479 1480 if (odip != ndip) { 1481 if (!ndip->i_inode.i_nlink) { 1482 error = -ENOENT; 1483 goto out_gunlock; 1484 } 1485 if (ndip->i_entries == (u32)-1) { 1486 error = -EFBIG; 1487 goto out_gunlock; 1488 } 1489 if (S_ISDIR(ip->i_inode.i_mode) && 1490 ndip->i_inode.i_nlink == (u32)-1) { 1491 error = -EMLINK; 1492 goto out_gunlock; 1493 } 1494 } 1495 } 1496 1497 /* Check out the dir to be renamed */ 1498 1499 if (dir_rename) { 1500 error = gfs2_permission(d_inode(odentry), MAY_WRITE); 1501 if (error) 1502 goto out_gunlock; 1503 } 1504 1505 if (nip == NULL) { 1506 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 1507 if (error) 1508 goto out_gunlock; 1509 } 1510 1511 if (da.nr_blocks) { 1512 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1513 error = gfs2_quota_lock_check(ndip, &ap); 1514 if (error) 1515 goto out_gunlock; 1516 1517 error = gfs2_inplace_reserve(ndip, &ap); 1518 if (error) 1519 goto out_gunlock_q; 1520 1521 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1522 4 * RES_LEAF + 4, 0); 1523 if (error) 1524 goto out_ipreserv; 1525 } else { 1526 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 1527 5 * RES_LEAF + 4, 0); 1528 if (error) 1529 goto out_gunlock; 1530 } 1531 1532 /* Remove the target file, if it exists */ 1533 1534 if (nip) 1535 error = gfs2_unlink_inode(ndip, ndentry); 1536 1537 error = update_moved_ino(ip, ndip, dir_rename); 1538 if (error) 1539 goto out_end_trans; 1540 1541 error = gfs2_dir_del(odip, odentry); 1542 if (error) 1543 goto out_end_trans; 1544 1545 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 1546 if (error) 1547 goto out_end_trans; 1548 1549 out_end_trans: 1550 gfs2_trans_end(sdp); 1551 out_ipreserv: 1552 if (da.nr_blocks) 1553 gfs2_inplace_release(ndip); 1554 out_gunlock_q: 1555 if (da.nr_blocks) 1556 gfs2_quota_unlock(ndip); 1557 out_gunlock: 1558 gfs2_dir_no_add(&da); 1559 if (gfs2_holder_initialized(&rd_gh)) 1560 gfs2_glock_dq_uninit(&rd_gh); 1561 1562 while (x--) { 1563 if (gfs2_holder_queued(ghs + x)) 1564 gfs2_glock_dq(ghs + x); 1565 gfs2_holder_uninit(ghs + x); 1566 } 1567 out_gunlock_r: 1568 if (gfs2_holder_initialized(&r_gh)) 1569 gfs2_glock_dq_uninit(&r_gh); 1570 out: 1571 return error; 1572 } 1573 1574 /** 1575 * gfs2_exchange - exchange two files 1576 * @odir: Parent directory of old file name 1577 * @odentry: The old dentry of the file 1578 * @ndir: Parent directory of new file name 1579 * @ndentry: The new dentry of the file 1580 * @flags: The rename flags 1581 * 1582 * Returns: errno 1583 */ 1584 1585 static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1586 struct inode *ndir, struct dentry *ndentry, 1587 unsigned int flags) 1588 { 1589 struct gfs2_inode *odip = GFS2_I(odir); 1590 struct gfs2_inode *ndip = GFS2_I(ndir); 1591 struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1592 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1593 struct gfs2_sbd *sdp = GFS2_SB(odir); 1594 struct gfs2_holder ghs[4], r_gh; 1595 unsigned int num_gh; 1596 unsigned int x; 1597 umode_t old_mode = oip->i_inode.i_mode; 1598 umode_t new_mode = nip->i_inode.i_mode; 1599 int error; 1600 1601 gfs2_holder_mark_uninitialized(&r_gh); 1602 error = gfs2_rindex_update(sdp); 1603 if (error) 1604 return error; 1605 1606 if (odip != ndip) { 1607 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1608 0, &r_gh); 1609 if (error) 1610 goto out; 1611 1612 if (S_ISDIR(old_mode)) { 1613 /* don't move a directory into its subdir */ 1614 error = gfs2_ok_to_move(oip, ndip); 1615 if (error) 1616 goto out_gunlock_r; 1617 } 1618 1619 if (S_ISDIR(new_mode)) { 1620 /* don't move a directory into its subdir */ 1621 error = gfs2_ok_to_move(nip, odip); 1622 if (error) 1623 goto out_gunlock_r; 1624 } 1625 } 1626 1627 num_gh = 1; 1628 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 1629 if (odip != ndip) { 1630 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1631 ghs + num_gh); 1632 num_gh++; 1633 } 1634 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1635 num_gh++; 1636 1637 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1638 num_gh++; 1639 1640 for (x = 0; x < num_gh; x++) { 1641 error = gfs2_glock_nq(ghs + x); 1642 if (error) 1643 goto out_gunlock; 1644 } 1645 1646 error = gfs2_glock_async_wait(num_gh, ghs); 1647 if (error) 1648 goto out_gunlock; 1649 1650 error = -ENOENT; 1651 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1652 goto out_gunlock; 1653 1654 error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1655 if (error) 1656 goto out_gunlock; 1657 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1658 if (error) 1659 goto out_gunlock; 1660 1661 if (S_ISDIR(old_mode)) { 1662 error = gfs2_permission(odentry->d_inode, MAY_WRITE); 1663 if (error) 1664 goto out_gunlock; 1665 } 1666 if (S_ISDIR(new_mode)) { 1667 error = gfs2_permission(ndentry->d_inode, MAY_WRITE); 1668 if (error) 1669 goto out_gunlock; 1670 } 1671 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1672 if (error) 1673 goto out_gunlock; 1674 1675 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1676 if (error) 1677 goto out_end_trans; 1678 1679 error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1680 if (error) 1681 goto out_end_trans; 1682 1683 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1684 IF2DT(old_mode)); 1685 if (error) 1686 goto out_end_trans; 1687 1688 error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1689 IF2DT(new_mode)); 1690 if (error) 1691 goto out_end_trans; 1692 1693 if (odip != ndip) { 1694 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1695 inc_nlink(&odip->i_inode); 1696 drop_nlink(&ndip->i_inode); 1697 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1698 inc_nlink(&ndip->i_inode); 1699 drop_nlink(&odip->i_inode); 1700 } 1701 } 1702 mark_inode_dirty(&ndip->i_inode); 1703 if (odip != ndip) 1704 mark_inode_dirty(&odip->i_inode); 1705 1706 out_end_trans: 1707 gfs2_trans_end(sdp); 1708 out_gunlock: 1709 while (x--) { 1710 if (gfs2_holder_queued(ghs + x)) 1711 gfs2_glock_dq(ghs + x); 1712 gfs2_holder_uninit(ghs + x); 1713 } 1714 out_gunlock_r: 1715 if (gfs2_holder_initialized(&r_gh)) 1716 gfs2_glock_dq_uninit(&r_gh); 1717 out: 1718 return error; 1719 } 1720 1721 static int gfs2_rename2(struct inode *odir, struct dentry *odentry, 1722 struct inode *ndir, struct dentry *ndentry, 1723 unsigned int flags) 1724 { 1725 flags &= ~RENAME_NOREPLACE; 1726 1727 if (flags & ~RENAME_EXCHANGE) 1728 return -EINVAL; 1729 1730 if (flags & RENAME_EXCHANGE) 1731 return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1732 1733 return gfs2_rename(odir, odentry, ndir, ndentry); 1734 } 1735 1736 /** 1737 * gfs2_get_link - Follow a symbolic link 1738 * @dentry: The dentry of the link 1739 * @inode: The inode of the link 1740 * @done: destructor for return value 1741 * 1742 * This can handle symlinks of any size. 1743 * 1744 * Returns: 0 on success or error code 1745 */ 1746 1747 static const char *gfs2_get_link(struct dentry *dentry, 1748 struct inode *inode, 1749 struct delayed_call *done) 1750 { 1751 struct gfs2_inode *ip = GFS2_I(inode); 1752 struct gfs2_holder i_gh; 1753 struct buffer_head *dibh; 1754 unsigned int size; 1755 char *buf; 1756 int error; 1757 1758 if (!dentry) 1759 return ERR_PTR(-ECHILD); 1760 1761 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 1762 error = gfs2_glock_nq(&i_gh); 1763 if (error) { 1764 gfs2_holder_uninit(&i_gh); 1765 return ERR_PTR(error); 1766 } 1767 1768 size = (unsigned int)i_size_read(&ip->i_inode); 1769 if (size == 0) { 1770 gfs2_consist_inode(ip); 1771 buf = ERR_PTR(-EIO); 1772 goto out; 1773 } 1774 1775 error = gfs2_meta_inode_buffer(ip, &dibh); 1776 if (error) { 1777 buf = ERR_PTR(error); 1778 goto out; 1779 } 1780 1781 buf = kzalloc(size + 1, GFP_NOFS); 1782 if (!buf) 1783 buf = ERR_PTR(-ENOMEM); 1784 else 1785 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 1786 brelse(dibh); 1787 out: 1788 gfs2_glock_dq_uninit(&i_gh); 1789 if (!IS_ERR(buf)) 1790 set_delayed_call(done, kfree_link, buf); 1791 return buf; 1792 } 1793 1794 /** 1795 * gfs2_permission - 1796 * @inode: The inode 1797 * @mask: The mask to be tested 1798 * @flags: Indicates whether this is an RCU path walk or not 1799 * 1800 * This may be called from the VFS directly, or from within GFS2 with the 1801 * inode locked, so we look to see if the glock is already locked and only 1802 * lock the glock if its not already been done. 1803 * 1804 * Returns: errno 1805 */ 1806 1807 int gfs2_permission(struct inode *inode, int mask) 1808 { 1809 struct gfs2_inode *ip; 1810 struct gfs2_holder i_gh; 1811 int error; 1812 1813 gfs2_holder_mark_uninitialized(&i_gh); 1814 ip = GFS2_I(inode); 1815 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 1816 if (mask & MAY_NOT_BLOCK) 1817 return -ECHILD; 1818 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 1819 if (error) 1820 return error; 1821 } 1822 1823 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1824 error = -EPERM; 1825 else 1826 error = generic_permission(inode, mask); 1827 if (gfs2_holder_initialized(&i_gh)) 1828 gfs2_glock_dq_uninit(&i_gh); 1829 1830 return error; 1831 } 1832 1833 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 1834 { 1835 setattr_copy(inode, attr); 1836 mark_inode_dirty(inode); 1837 return 0; 1838 } 1839 1840 /** 1841 * gfs2_setattr_simple - 1842 * @ip: 1843 * @attr: 1844 * 1845 * Returns: errno 1846 */ 1847 1848 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 1849 { 1850 int error; 1851 1852 if (current->journal_info) 1853 return __gfs2_setattr_simple(inode, attr); 1854 1855 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 1856 if (error) 1857 return error; 1858 1859 error = __gfs2_setattr_simple(inode, attr); 1860 gfs2_trans_end(GFS2_SB(inode)); 1861 return error; 1862 } 1863 1864 static int setattr_chown(struct inode *inode, struct iattr *attr) 1865 { 1866 struct gfs2_inode *ip = GFS2_I(inode); 1867 struct gfs2_sbd *sdp = GFS2_SB(inode); 1868 kuid_t ouid, nuid; 1869 kgid_t ogid, ngid; 1870 int error; 1871 struct gfs2_alloc_parms ap; 1872 1873 ouid = inode->i_uid; 1874 ogid = inode->i_gid; 1875 nuid = attr->ia_uid; 1876 ngid = attr->ia_gid; 1877 1878 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1879 ouid = nuid = NO_UID_QUOTA_CHANGE; 1880 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1881 ogid = ngid = NO_GID_QUOTA_CHANGE; 1882 1883 error = gfs2_rsqa_alloc(ip); 1884 if (error) 1885 goto out; 1886 1887 error = gfs2_rindex_update(sdp); 1888 if (error) 1889 goto out; 1890 1891 error = gfs2_quota_lock(ip, nuid, ngid); 1892 if (error) 1893 goto out; 1894 1895 ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1896 1897 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 1898 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1899 error = gfs2_quota_check(ip, nuid, ngid, &ap); 1900 if (error) 1901 goto out_gunlock_q; 1902 } 1903 1904 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 1905 if (error) 1906 goto out_gunlock_q; 1907 1908 error = gfs2_setattr_simple(inode, attr); 1909 if (error) 1910 goto out_end_trans; 1911 1912 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 1913 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1914 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1915 gfs2_quota_change(ip, ap.target, nuid, ngid); 1916 } 1917 1918 out_end_trans: 1919 gfs2_trans_end(sdp); 1920 out_gunlock_q: 1921 gfs2_quota_unlock(ip); 1922 out: 1923 return error; 1924 } 1925 1926 /** 1927 * gfs2_setattr - Change attributes on an inode 1928 * @dentry: The dentry which is changing 1929 * @attr: The structure describing the change 1930 * 1931 * The VFS layer wants to change one or more of an inodes attributes. Write 1932 * that change out to disk. 1933 * 1934 * Returns: errno 1935 */ 1936 1937 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 1938 { 1939 struct inode *inode = d_inode(dentry); 1940 struct gfs2_inode *ip = GFS2_I(inode); 1941 struct gfs2_holder i_gh; 1942 int error; 1943 1944 error = gfs2_rsqa_alloc(ip); 1945 if (error) 1946 return error; 1947 1948 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 1949 if (error) 1950 return error; 1951 1952 error = -EPERM; 1953 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 1954 goto out; 1955 1956 error = setattr_prepare(dentry, attr); 1957 if (error) 1958 goto out; 1959 1960 if (attr->ia_valid & ATTR_SIZE) 1961 error = gfs2_setattr_size(inode, attr->ia_size); 1962 else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 1963 error = setattr_chown(inode, attr); 1964 else { 1965 error = gfs2_setattr_simple(inode, attr); 1966 if (!error && attr->ia_valid & ATTR_MODE) 1967 error = posix_acl_chmod(inode, inode->i_mode); 1968 } 1969 1970 out: 1971 if (!error) 1972 mark_inode_dirty(inode); 1973 gfs2_glock_dq_uninit(&i_gh); 1974 return error; 1975 } 1976 1977 /** 1978 * gfs2_getattr - Read out an inode's attributes 1979 * @path: Object to query 1980 * @stat: The inode's stats 1981 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1982 * @flags: AT_STATX_xxx setting 1983 * 1984 * This may be called from the VFS directly, or from within GFS2 with the 1985 * inode locked, so we look to see if the glock is already locked and only 1986 * lock the glock if its not already been done. Note that its the NFS 1987 * readdirplus operation which causes this to be called (from filldir) 1988 * with the glock already held. 1989 * 1990 * Returns: errno 1991 */ 1992 1993 static int gfs2_getattr(const struct path *path, struct kstat *stat, 1994 u32 request_mask, unsigned int flags) 1995 { 1996 struct inode *inode = d_inode(path->dentry); 1997 struct gfs2_inode *ip = GFS2_I(inode); 1998 struct gfs2_holder gh; 1999 u32 gfsflags; 2000 int error; 2001 2002 gfs2_holder_mark_uninitialized(&gh); 2003 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 2004 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 2005 if (error) 2006 return error; 2007 } 2008 2009 gfsflags = ip->i_diskflags; 2010 if (gfsflags & GFS2_DIF_APPENDONLY) 2011 stat->attributes |= STATX_ATTR_APPEND; 2012 if (gfsflags & GFS2_DIF_IMMUTABLE) 2013 stat->attributes |= STATX_ATTR_IMMUTABLE; 2014 2015 stat->attributes_mask |= (STATX_ATTR_APPEND | 2016 STATX_ATTR_COMPRESSED | 2017 STATX_ATTR_ENCRYPTED | 2018 STATX_ATTR_IMMUTABLE | 2019 STATX_ATTR_NODUMP); 2020 2021 generic_fillattr(inode, stat); 2022 2023 if (gfs2_holder_initialized(&gh)) 2024 gfs2_glock_dq_uninit(&gh); 2025 2026 return 0; 2027 } 2028 2029 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 2030 u64 start, u64 len) 2031 { 2032 struct gfs2_inode *ip = GFS2_I(inode); 2033 struct gfs2_holder gh; 2034 int ret; 2035 2036 inode_lock_shared(inode); 2037 2038 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2039 if (ret) 2040 goto out; 2041 2042 ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 2043 2044 gfs2_glock_dq_uninit(&gh); 2045 2046 out: 2047 inode_unlock_shared(inode); 2048 return ret; 2049 } 2050 2051 loff_t gfs2_seek_data(struct file *file, loff_t offset) 2052 { 2053 struct inode *inode = file->f_mapping->host; 2054 struct gfs2_inode *ip = GFS2_I(inode); 2055 struct gfs2_holder gh; 2056 loff_t ret; 2057 2058 inode_lock_shared(inode); 2059 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2060 if (!ret) 2061 ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 2062 gfs2_glock_dq_uninit(&gh); 2063 inode_unlock_shared(inode); 2064 2065 if (ret < 0) 2066 return ret; 2067 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 2068 } 2069 2070 loff_t gfs2_seek_hole(struct file *file, loff_t offset) 2071 { 2072 struct inode *inode = file->f_mapping->host; 2073 struct gfs2_inode *ip = GFS2_I(inode); 2074 struct gfs2_holder gh; 2075 loff_t ret; 2076 2077 inode_lock_shared(inode); 2078 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2079 if (!ret) 2080 ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 2081 gfs2_glock_dq_uninit(&gh); 2082 inode_unlock_shared(inode); 2083 2084 if (ret < 0) 2085 return ret; 2086 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 2087 } 2088 2089 const struct inode_operations gfs2_file_iops = { 2090 .permission = gfs2_permission, 2091 .setattr = gfs2_setattr, 2092 .getattr = gfs2_getattr, 2093 .listxattr = gfs2_listxattr, 2094 .fiemap = gfs2_fiemap, 2095 .get_acl = gfs2_get_acl, 2096 .set_acl = gfs2_set_acl, 2097 }; 2098 2099 const struct inode_operations gfs2_dir_iops = { 2100 .create = gfs2_create, 2101 .lookup = gfs2_lookup, 2102 .link = gfs2_link, 2103 .unlink = gfs2_unlink, 2104 .symlink = gfs2_symlink, 2105 .mkdir = gfs2_mkdir, 2106 .rmdir = gfs2_unlink, 2107 .mknod = gfs2_mknod, 2108 .rename = gfs2_rename2, 2109 .permission = gfs2_permission, 2110 .setattr = gfs2_setattr, 2111 .getattr = gfs2_getattr, 2112 .listxattr = gfs2_listxattr, 2113 .fiemap = gfs2_fiemap, 2114 .get_acl = gfs2_get_acl, 2115 .set_acl = gfs2_set_acl, 2116 .atomic_open = gfs2_atomic_open, 2117 }; 2118 2119 const struct inode_operations gfs2_symlink_iops = { 2120 .get_link = gfs2_get_link, 2121 .permission = gfs2_permission, 2122 .setattr = gfs2_setattr, 2123 .getattr = gfs2_getattr, 2124 .listxattr = gfs2_listxattr, 2125 .fiemap = gfs2_fiemap, 2126 }; 2127 2128