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); 139 140 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 141 if (unlikely(error)) 142 goto fail; 143 flush_delayed_work(&ip->i_gl->gl_work); 144 145 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 146 if (unlikely(error)) 147 goto fail; 148 149 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { 150 /* 151 * The GL_SKIP flag indicates to skip reading the inode 152 * block. We read the inode with gfs2_inode_refresh 153 * after possibly checking the block type. 154 */ 155 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 156 GL_SKIP, &i_gh); 157 if (error) 158 goto fail; 159 160 if (blktype != GFS2_BLKST_FREE) { 161 error = gfs2_check_blk_type(sdp, no_addr, 162 blktype); 163 if (error) 164 goto fail; 165 } 166 } 167 168 glock_set_object(ip->i_gl, ip); 169 set_bit(GIF_INVALID, &ip->i_flags); 170 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 171 if (unlikely(error)) 172 goto fail; 173 glock_set_object(ip->i_iopen_gh.gh_gl, ip); 174 gfs2_glock_put(io_gl); 175 io_gl = NULL; 176 177 /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ 178 inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); 179 inode->i_atime.tv_nsec = 0; 180 181 if (type == DT_UNKNOWN) { 182 /* Inode glock must be locked already */ 183 error = gfs2_inode_refresh(GFS2_I(inode)); 184 if (error) 185 goto fail; 186 } else { 187 ip->i_no_formal_ino = no_formal_ino; 188 inode->i_mode = DT2IF(type); 189 } 190 191 gfs2_set_iop(inode); 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: 201 if (io_gl) 202 gfs2_glock_put(io_gl); 203 if (gfs2_holder_initialized(&i_gh)) 204 gfs2_glock_dq_uninit(&i_gh); 205 iget_failed(inode); 206 return ERR_PTR(error); 207 } 208 209 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 210 u64 *no_formal_ino, unsigned int blktype) 211 { 212 struct super_block *sb = sdp->sd_vfs; 213 struct inode *inode; 214 int error; 215 216 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype); 217 if (IS_ERR(inode)) 218 return inode; 219 220 /* Two extra checks for NFS only */ 221 if (no_formal_ino) { 222 error = -ESTALE; 223 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) 224 goto fail_iput; 225 226 error = -EIO; 227 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 228 goto fail_iput; 229 } 230 return inode; 231 232 fail_iput: 233 iput(inode); 234 return ERR_PTR(error); 235 } 236 237 238 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 239 { 240 struct qstr qstr; 241 struct inode *inode; 242 gfs2_str2qstr(&qstr, name); 243 inode = gfs2_lookupi(dip, &qstr, 1); 244 /* gfs2_lookupi has inconsistent callers: vfs 245 * related routines expect NULL for no entry found, 246 * gfs2_lookup_simple callers expect ENOENT 247 * and do not check for NULL. 248 */ 249 if (inode == NULL) 250 return ERR_PTR(-ENOENT); 251 else 252 return inode; 253 } 254 255 256 /** 257 * gfs2_lookupi - Look up a filename in a directory and return its inode 258 * @d_gh: An initialized holder for the directory glock 259 * @name: The name of the inode to look for 260 * @is_root: If 1, ignore the caller's permissions 261 * @i_gh: An uninitialized holder for the new inode glock 262 * 263 * This can be called via the VFS filldir function when NFS is doing 264 * a readdirplus and the inode which its intending to stat isn't 265 * already in cache. In this case we must not take the directory glock 266 * again, since the readdir call will have already taken that lock. 267 * 268 * Returns: errno 269 */ 270 271 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 272 int is_root) 273 { 274 struct super_block *sb = dir->i_sb; 275 struct gfs2_inode *dip = GFS2_I(dir); 276 struct gfs2_holder d_gh; 277 int error = 0; 278 struct inode *inode = NULL; 279 280 gfs2_holder_mark_uninitialized(&d_gh); 281 if (!name->len || name->len > GFS2_FNAMESIZE) 282 return ERR_PTR(-ENAMETOOLONG); 283 284 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 285 (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 286 dir == d_inode(sb->s_root))) { 287 igrab(dir); 288 return dir; 289 } 290 291 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 292 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 293 if (error) 294 return ERR_PTR(error); 295 } 296 297 if (!is_root) { 298 error = gfs2_permission(dir, MAY_EXEC); 299 if (error) 300 goto out; 301 } 302 303 inode = gfs2_dir_search(dir, name, false); 304 if (IS_ERR(inode)) 305 error = PTR_ERR(inode); 306 out: 307 if (gfs2_holder_initialized(&d_gh)) 308 gfs2_glock_dq_uninit(&d_gh); 309 if (error == -ENOENT) 310 return NULL; 311 return inode ? inode : ERR_PTR(error); 312 } 313 314 /** 315 * create_ok - OK to create a new on-disk inode here? 316 * @dip: Directory in which dinode is to be created 317 * @name: Name of new dinode 318 * @mode: 319 * 320 * Returns: errno 321 */ 322 323 static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 324 umode_t mode) 325 { 326 int error; 327 328 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 329 if (error) 330 return error; 331 332 /* Don't create entries in an unlinked directory */ 333 if (!dip->i_inode.i_nlink) 334 return -ENOENT; 335 336 if (dip->i_entries == (u32)-1) 337 return -EFBIG; 338 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 339 return -EMLINK; 340 341 return 0; 342 } 343 344 static void munge_mode_uid_gid(const struct gfs2_inode *dip, 345 struct inode *inode) 346 { 347 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 348 (dip->i_inode.i_mode & S_ISUID) && 349 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 350 if (S_ISDIR(inode->i_mode)) 351 inode->i_mode |= S_ISUID; 352 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 353 inode->i_mode &= ~07111; 354 inode->i_uid = dip->i_inode.i_uid; 355 } else 356 inode->i_uid = current_fsuid(); 357 358 if (dip->i_inode.i_mode & S_ISGID) { 359 if (S_ISDIR(inode->i_mode)) 360 inode->i_mode |= S_ISGID; 361 inode->i_gid = dip->i_inode.i_gid; 362 } else 363 inode->i_gid = current_fsgid(); 364 } 365 366 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 367 { 368 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 369 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 370 int error; 371 372 error = gfs2_quota_lock_check(ip, &ap); 373 if (error) 374 goto out; 375 376 error = gfs2_inplace_reserve(ip, &ap); 377 if (error) 378 goto out_quota; 379 380 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 381 if (error) 382 goto out_ipreserv; 383 384 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 385 ip->i_no_formal_ino = ip->i_generation; 386 ip->i_inode.i_ino = ip->i_no_addr; 387 ip->i_goal = ip->i_no_addr; 388 389 gfs2_trans_end(sdp); 390 391 out_ipreserv: 392 gfs2_inplace_release(ip); 393 out_quota: 394 gfs2_quota_unlock(ip); 395 out: 396 return error; 397 } 398 399 static void gfs2_init_dir(struct buffer_head *dibh, 400 const struct gfs2_inode *parent) 401 { 402 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 403 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 404 405 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 406 dent->de_inum = di->di_num; /* already GFS2 endian */ 407 dent->de_type = cpu_to_be16(DT_DIR); 408 409 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 410 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 411 gfs2_inum_out(parent, dent); 412 dent->de_type = cpu_to_be16(DT_DIR); 413 414 } 415 416 /** 417 * gfs2_init_xattr - Initialise an xattr block for a new inode 418 * @ip: The inode in question 419 * 420 * This sets up an empty xattr block for a new inode, ready to 421 * take any ACLs, LSM xattrs, etc. 422 */ 423 424 static void gfs2_init_xattr(struct gfs2_inode *ip) 425 { 426 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 427 struct buffer_head *bh; 428 struct gfs2_ea_header *ea; 429 430 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 431 gfs2_trans_add_meta(ip->i_gl, bh); 432 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 433 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 434 435 ea = GFS2_EA_BH2FIRST(bh); 436 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 437 ea->ea_type = GFS2_EATYPE_UNUSED; 438 ea->ea_flags = GFS2_EAFLAG_LAST; 439 440 brelse(bh); 441 } 442 443 /** 444 * init_dinode - Fill in a new dinode structure 445 * @dip: The directory this inode is being created in 446 * @ip: The inode 447 * @symname: The symlink destination (if a symlink) 448 * @bhp: The buffer head (returned to caller) 449 * 450 */ 451 452 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 453 const char *symname) 454 { 455 struct gfs2_dinode *di; 456 struct buffer_head *dibh; 457 458 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 459 gfs2_trans_add_meta(ip->i_gl, dibh); 460 di = (struct gfs2_dinode *)dibh->b_data; 461 gfs2_dinode_out(ip, di); 462 463 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); 464 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); 465 di->__pad1 = 0; 466 di->__pad2 = 0; 467 di->__pad3 = 0; 468 memset(&di->__pad4, 0, sizeof(di->__pad4)); 469 memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 470 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 471 472 switch(ip->i_inode.i_mode & S_IFMT) { 473 case S_IFDIR: 474 gfs2_init_dir(dibh, dip); 475 break; 476 case S_IFLNK: 477 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 478 break; 479 } 480 481 set_buffer_uptodate(dibh); 482 brelse(dibh); 483 } 484 485 /** 486 * gfs2_trans_da_blocks - Calculate number of blocks to link inode 487 * @dip: The directory we are linking into 488 * @da: The dir add information 489 * @nr_inodes: The number of inodes involved 490 * 491 * This calculate the number of blocks we need to reserve in a 492 * transaction to link @nr_inodes into a directory. In most cases 493 * @nr_inodes will be 2 (the directory plus the inode being linked in) 494 * but in case of rename, 4 may be required. 495 * 496 * Returns: Number of blocks 497 */ 498 499 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 500 const struct gfs2_diradd *da, 501 unsigned nr_inodes) 502 { 503 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 504 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 505 } 506 507 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 508 struct gfs2_inode *ip, struct gfs2_diradd *da) 509 { 510 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 511 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 512 int error; 513 514 if (da->nr_blocks) { 515 error = gfs2_quota_lock_check(dip, &ap); 516 if (error) 517 goto fail_quota_locks; 518 519 error = gfs2_inplace_reserve(dip, &ap); 520 if (error) 521 goto fail_quota_locks; 522 523 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 524 if (error) 525 goto fail_ipreserv; 526 } else { 527 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 528 if (error) 529 goto fail_quota_locks; 530 } 531 532 error = gfs2_dir_add(&dip->i_inode, name, ip, da); 533 534 gfs2_trans_end(sdp); 535 fail_ipreserv: 536 gfs2_inplace_release(dip); 537 fail_quota_locks: 538 gfs2_quota_unlock(dip); 539 return error; 540 } 541 542 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 543 void *fs_info) 544 { 545 const struct xattr *xattr; 546 int err = 0; 547 548 for (xattr = xattr_array; xattr->name != NULL; xattr++) { 549 err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 550 xattr->value_len, 0, 551 GFS2_EATYPE_SECURITY); 552 if (err < 0) 553 break; 554 } 555 return err; 556 } 557 558 /** 559 * gfs2_create_inode - Create a new inode 560 * @dir: The parent directory 561 * @dentry: The new dentry 562 * @file: If non-NULL, the file which is being opened 563 * @mode: The permissions on the new inode 564 * @dev: For device nodes, this is the device number 565 * @symname: For symlinks, this is the link destination 566 * @size: The initial size of the inode (ignored for directories) 567 * 568 * Returns: 0 on success, or error code 569 */ 570 571 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 572 struct file *file, 573 umode_t mode, dev_t dev, const char *symname, 574 unsigned int size, int excl) 575 { 576 const struct qstr *name = &dentry->d_name; 577 struct posix_acl *default_acl, *acl; 578 struct gfs2_holder ghs[2]; 579 struct inode *inode = NULL; 580 struct gfs2_inode *dip = GFS2_I(dir), *ip; 581 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 582 struct gfs2_glock *io_gl = NULL; 583 int error, free_vfs_inode = 1; 584 u32 aflags = 0; 585 unsigned blocks = 1; 586 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 587 588 if (!name->len || name->len > GFS2_FNAMESIZE) 589 return -ENAMETOOLONG; 590 591 error = gfs2_qa_get(dip); 592 if (error) 593 return error; 594 595 error = gfs2_rindex_update(sdp); 596 if (error) 597 goto fail; 598 599 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 600 if (error) 601 goto fail; 602 gfs2_holder_mark_uninitialized(ghs + 1); 603 604 error = create_ok(dip, name, mode); 605 if (error) 606 goto fail_gunlock; 607 608 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 609 error = PTR_ERR(inode); 610 if (!IS_ERR(inode)) { 611 if (S_ISDIR(inode->i_mode)) { 612 iput(inode); 613 inode = ERR_PTR(-EISDIR); 614 goto fail_gunlock; 615 } 616 d_instantiate(dentry, inode); 617 error = 0; 618 if (file) { 619 if (S_ISREG(inode->i_mode)) 620 error = finish_open(file, dentry, gfs2_open_common); 621 else 622 error = finish_no_open(file, NULL); 623 } 624 gfs2_glock_dq_uninit(ghs); 625 goto fail; 626 } else if (error != -ENOENT) { 627 goto fail_gunlock; 628 } 629 630 error = gfs2_diradd_alloc_required(dir, name, &da); 631 if (error < 0) 632 goto fail_gunlock; 633 634 inode = new_inode(sdp->sd_vfs); 635 error = -ENOMEM; 636 if (!inode) 637 goto fail_gunlock; 638 639 error = posix_acl_create(dir, &mode, &default_acl, &acl); 640 if (error) 641 goto fail_gunlock; 642 643 ip = GFS2_I(inode); 644 error = gfs2_qa_get(ip); 645 if (error) 646 goto fail_free_acls; 647 648 inode->i_mode = mode; 649 set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 650 inode->i_rdev = dev; 651 inode->i_size = size; 652 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 653 munge_mode_uid_gid(dip, inode); 654 check_and_update_goal(dip); 655 ip->i_goal = dip->i_goal; 656 ip->i_diskflags = 0; 657 ip->i_eattr = 0; 658 ip->i_height = 0; 659 ip->i_depth = 0; 660 ip->i_entries = 0; 661 ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 662 663 switch(mode & S_IFMT) { 664 case S_IFREG: 665 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 666 gfs2_tune_get(sdp, gt_new_files_jdata)) 667 ip->i_diskflags |= GFS2_DIF_JDATA; 668 gfs2_set_aops(inode); 669 break; 670 case S_IFDIR: 671 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 672 ip->i_diskflags |= GFS2_DIF_JDATA; 673 ip->i_entries = 2; 674 break; 675 } 676 677 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 678 if (dip->i_diskflags & GFS2_DIF_SYSTEM) 679 ip->i_diskflags |= GFS2_DIF_SYSTEM; 680 681 gfs2_set_inode_flags(inode); 682 683 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 684 (dip->i_diskflags & GFS2_DIF_TOPDIR)) 685 aflags |= GFS2_AF_ORLOV; 686 687 if (default_acl || acl) 688 blocks++; 689 690 error = alloc_dinode(ip, aflags, &blocks); 691 if (error) 692 goto fail_free_inode; 693 694 gfs2_set_inode_blocks(inode, blocks); 695 696 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 697 if (error) 698 goto fail_free_inode; 699 flush_delayed_work(&ip->i_gl->gl_work); 700 glock_set_object(ip->i_gl, ip); 701 702 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 703 if (error) 704 goto fail_free_inode; 705 706 error = gfs2_trans_begin(sdp, blocks, 0); 707 if (error) 708 goto fail_free_inode; 709 710 if (blocks > 1) { 711 ip->i_eattr = ip->i_no_addr + 1; 712 gfs2_init_xattr(ip); 713 } 714 init_dinode(dip, ip, symname); 715 gfs2_trans_end(sdp); 716 717 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 718 if (error) 719 goto fail_free_inode; 720 721 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); 722 723 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 724 if (error) 725 goto fail_gunlock2; 726 727 glock_set_object(ip->i_iopen_gh.gh_gl, ip); 728 gfs2_set_iop(inode); 729 insert_inode_hash(inode); 730 731 free_vfs_inode = 0; /* After this point, the inode is no longer 732 considered free. Any failures need to undo 733 the gfs2 structures. */ 734 if (default_acl) { 735 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 736 if (error) 737 goto fail_gunlock3; 738 posix_acl_release(default_acl); 739 default_acl = NULL; 740 } 741 if (acl) { 742 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 743 if (error) 744 goto fail_gunlock3; 745 posix_acl_release(acl); 746 acl = NULL; 747 } 748 749 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 750 &gfs2_initxattrs, NULL); 751 if (error) 752 goto fail_gunlock3; 753 754 error = link_dinode(dip, name, ip, &da); 755 if (error) 756 goto fail_gunlock3; 757 758 mark_inode_dirty(inode); 759 d_instantiate(dentry, inode); 760 /* After instantiate, errors should result in evict which will destroy 761 * both inode and iopen glocks properly. */ 762 if (file) { 763 file->f_mode |= FMODE_CREATED; 764 error = finish_open(file, dentry, gfs2_open_common); 765 } 766 gfs2_glock_dq_uninit(ghs); 767 gfs2_qa_put(ip); 768 gfs2_glock_dq_uninit(ghs + 1); 769 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); 770 gfs2_glock_put(io_gl); 771 gfs2_qa_put(dip); 772 return error; 773 774 fail_gunlock3: 775 glock_clear_object(io_gl, ip); 776 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 777 fail_gunlock2: 778 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); 779 gfs2_glock_put(io_gl); 780 fail_free_inode: 781 if (ip->i_gl) { 782 glock_clear_object(ip->i_gl, ip); 783 gfs2_glock_put(ip->i_gl); 784 } 785 gfs2_rs_delete(ip, NULL); 786 gfs2_qa_put(ip); 787 fail_free_acls: 788 posix_acl_release(default_acl); 789 posix_acl_release(acl); 790 fail_gunlock: 791 gfs2_dir_no_add(&da); 792 gfs2_glock_dq_uninit(ghs); 793 if (!IS_ERR_OR_NULL(inode)) { 794 clear_nlink(inode); 795 if (!free_vfs_inode) 796 mark_inode_dirty(inode); 797 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, 798 &GFS2_I(inode)->i_flags); 799 iput(inode); 800 } 801 if (gfs2_holder_initialized(ghs + 1)) 802 gfs2_glock_dq_uninit(ghs + 1); 803 fail: 804 gfs2_qa_put(dip); 805 return error; 806 } 807 808 /** 809 * gfs2_create - Create a file 810 * @dir: The directory in which to create the file 811 * @dentry: The dentry of the new file 812 * @mode: The mode of the new file 813 * 814 * Returns: errno 815 */ 816 817 static int gfs2_create(struct inode *dir, struct dentry *dentry, 818 umode_t mode, bool excl) 819 { 820 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); 821 } 822 823 /** 824 * __gfs2_lookup - Look up a filename in a directory and return its inode 825 * @dir: The directory inode 826 * @dentry: The dentry of the new inode 827 * @file: File to be opened 828 * 829 * 830 * Returns: errno 831 */ 832 833 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 834 struct file *file) 835 { 836 struct inode *inode; 837 struct dentry *d; 838 struct gfs2_holder gh; 839 struct gfs2_glock *gl; 840 int error; 841 842 inode = gfs2_lookupi(dir, &dentry->d_name, 0); 843 if (inode == NULL) { 844 d_add(dentry, NULL); 845 return NULL; 846 } 847 if (IS_ERR(inode)) 848 return ERR_CAST(inode); 849 850 gl = GFS2_I(inode)->i_gl; 851 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 852 if (error) { 853 iput(inode); 854 return ERR_PTR(error); 855 } 856 857 d = d_splice_alias(inode, dentry); 858 if (IS_ERR(d)) { 859 gfs2_glock_dq_uninit(&gh); 860 return d; 861 } 862 if (file && S_ISREG(inode->i_mode)) 863 error = finish_open(file, dentry, gfs2_open_common); 864 865 gfs2_glock_dq_uninit(&gh); 866 if (error) { 867 dput(d); 868 return ERR_PTR(error); 869 } 870 return d; 871 } 872 873 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 874 unsigned flags) 875 { 876 return __gfs2_lookup(dir, dentry, NULL); 877 } 878 879 /** 880 * gfs2_link - Link to a file 881 * @old_dentry: The inode to link 882 * @dir: Add link to this directory 883 * @dentry: The name of the link 884 * 885 * Link the inode in "old_dentry" into the directory "dir" with the 886 * name in "dentry". 887 * 888 * Returns: errno 889 */ 890 891 static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 892 struct dentry *dentry) 893 { 894 struct gfs2_inode *dip = GFS2_I(dir); 895 struct gfs2_sbd *sdp = GFS2_SB(dir); 896 struct inode *inode = d_inode(old_dentry); 897 struct gfs2_inode *ip = GFS2_I(inode); 898 struct gfs2_holder ghs[2]; 899 struct buffer_head *dibh; 900 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 901 int error; 902 903 if (S_ISDIR(inode->i_mode)) 904 return -EPERM; 905 906 error = gfs2_qa_get(dip); 907 if (error) 908 return error; 909 910 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 911 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 912 913 error = gfs2_glock_nq(ghs); /* parent */ 914 if (error) 915 goto out_parent; 916 917 error = gfs2_glock_nq(ghs + 1); /* child */ 918 if (error) 919 goto out_child; 920 921 error = -ENOENT; 922 if (inode->i_nlink == 0) 923 goto out_gunlock; 924 925 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 926 if (error) 927 goto out_gunlock; 928 929 error = gfs2_dir_check(dir, &dentry->d_name, NULL); 930 switch (error) { 931 case -ENOENT: 932 break; 933 case 0: 934 error = -EEXIST; 935 default: 936 goto out_gunlock; 937 } 938 939 error = -EINVAL; 940 if (!dip->i_inode.i_nlink) 941 goto out_gunlock; 942 error = -EFBIG; 943 if (dip->i_entries == (u32)-1) 944 goto out_gunlock; 945 error = -EPERM; 946 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 947 goto out_gunlock; 948 error = -EINVAL; 949 if (!ip->i_inode.i_nlink) 950 goto out_gunlock; 951 error = -EMLINK; 952 if (ip->i_inode.i_nlink == (u32)-1) 953 goto out_gunlock; 954 955 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 956 if (error < 0) 957 goto out_gunlock; 958 959 if (da.nr_blocks) { 960 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 961 error = gfs2_quota_lock_check(dip, &ap); 962 if (error) 963 goto out_gunlock; 964 965 error = gfs2_inplace_reserve(dip, &ap); 966 if (error) 967 goto out_gunlock_q; 968 969 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 970 if (error) 971 goto out_ipres; 972 } else { 973 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 974 if (error) 975 goto out_ipres; 976 } 977 978 error = gfs2_meta_inode_buffer(ip, &dibh); 979 if (error) 980 goto out_end_trans; 981 982 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 983 if (error) 984 goto out_brelse; 985 986 gfs2_trans_add_meta(ip->i_gl, dibh); 987 inc_nlink(&ip->i_inode); 988 ip->i_inode.i_ctime = current_time(&ip->i_inode); 989 ihold(inode); 990 d_instantiate(dentry, inode); 991 mark_inode_dirty(inode); 992 993 out_brelse: 994 brelse(dibh); 995 out_end_trans: 996 gfs2_trans_end(sdp); 997 out_ipres: 998 if (da.nr_blocks) 999 gfs2_inplace_release(dip); 1000 out_gunlock_q: 1001 if (da.nr_blocks) 1002 gfs2_quota_unlock(dip); 1003 out_gunlock: 1004 gfs2_dir_no_add(&da); 1005 gfs2_glock_dq(ghs + 1); 1006 out_child: 1007 gfs2_glock_dq(ghs); 1008 out_parent: 1009 gfs2_qa_put(dip); 1010 gfs2_holder_uninit(ghs); 1011 gfs2_holder_uninit(ghs + 1); 1012 return error; 1013 } 1014 1015 /* 1016 * gfs2_unlink_ok - check to see that a inode is still in a directory 1017 * @dip: the directory 1018 * @name: the name of the file 1019 * @ip: the inode 1020 * 1021 * Assumes that the lock on (at least) @dip is held. 1022 * 1023 * Returns: 0 if the parent/child relationship is correct, errno if it isn't 1024 */ 1025 1026 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 1027 const struct gfs2_inode *ip) 1028 { 1029 int error; 1030 1031 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 1032 return -EPERM; 1033 1034 if ((dip->i_inode.i_mode & S_ISVTX) && 1035 !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 1036 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 1037 return -EPERM; 1038 1039 if (IS_APPEND(&dip->i_inode)) 1040 return -EPERM; 1041 1042 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 1043 if (error) 1044 return error; 1045 1046 return gfs2_dir_check(&dip->i_inode, name, ip); 1047 } 1048 1049 /** 1050 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 1051 * @dip: The parent directory 1052 * @name: The name of the entry in the parent directory 1053 * @inode: The inode to be removed 1054 * 1055 * Called with all the locks and in a transaction. This will only be 1056 * called for a directory after it has been checked to ensure it is empty. 1057 * 1058 * Returns: 0 on success, or an error 1059 */ 1060 1061 static int gfs2_unlink_inode(struct gfs2_inode *dip, 1062 const struct dentry *dentry) 1063 { 1064 struct inode *inode = d_inode(dentry); 1065 struct gfs2_inode *ip = GFS2_I(inode); 1066 int error; 1067 1068 error = gfs2_dir_del(dip, dentry); 1069 if (error) 1070 return error; 1071 1072 ip->i_entries = 0; 1073 inode->i_ctime = current_time(inode); 1074 if (S_ISDIR(inode->i_mode)) 1075 clear_nlink(inode); 1076 else 1077 drop_nlink(inode); 1078 mark_inode_dirty(inode); 1079 if (inode->i_nlink == 0) 1080 gfs2_unlink_di(inode); 1081 return 0; 1082 } 1083 1084 1085 /** 1086 * gfs2_unlink - Unlink an inode (this does rmdir as well) 1087 * @dir: The inode of the directory containing the inode to unlink 1088 * @dentry: The file itself 1089 * 1090 * This routine uses the type of the inode as a flag to figure out 1091 * whether this is an unlink or an rmdir. 1092 * 1093 * Returns: errno 1094 */ 1095 1096 static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 1097 { 1098 struct gfs2_inode *dip = GFS2_I(dir); 1099 struct gfs2_sbd *sdp = GFS2_SB(dir); 1100 struct inode *inode = d_inode(dentry); 1101 struct gfs2_inode *ip = GFS2_I(inode); 1102 struct gfs2_holder ghs[3]; 1103 struct gfs2_rgrpd *rgd; 1104 int error; 1105 1106 error = gfs2_rindex_update(sdp); 1107 if (error) 1108 return error; 1109 1110 error = -EROFS; 1111 1112 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 1113 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 1114 1115 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1116 if (!rgd) 1117 goto out_inodes; 1118 1119 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 1120 1121 1122 error = gfs2_glock_nq(ghs); /* parent */ 1123 if (error) 1124 goto out_parent; 1125 1126 error = gfs2_glock_nq(ghs + 1); /* child */ 1127 if (error) 1128 goto out_child; 1129 1130 error = -ENOENT; 1131 if (inode->i_nlink == 0) 1132 goto out_rgrp; 1133 1134 if (S_ISDIR(inode->i_mode)) { 1135 error = -ENOTEMPTY; 1136 if (ip->i_entries > 2 || inode->i_nlink > 2) 1137 goto out_rgrp; 1138 } 1139 1140 error = gfs2_glock_nq(ghs + 2); /* rgrp */ 1141 if (error) 1142 goto out_rgrp; 1143 1144 error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 1145 if (error) 1146 goto out_gunlock; 1147 1148 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 1149 if (error) 1150 goto out_gunlock; 1151 1152 error = gfs2_unlink_inode(dip, dentry); 1153 gfs2_trans_end(sdp); 1154 1155 out_gunlock: 1156 gfs2_glock_dq(ghs + 2); 1157 out_rgrp: 1158 gfs2_glock_dq(ghs + 1); 1159 out_child: 1160 gfs2_glock_dq(ghs); 1161 out_parent: 1162 gfs2_holder_uninit(ghs + 2); 1163 out_inodes: 1164 gfs2_holder_uninit(ghs + 1); 1165 gfs2_holder_uninit(ghs); 1166 return error; 1167 } 1168 1169 /** 1170 * gfs2_symlink - Create a symlink 1171 * @dir: The directory to create the symlink in 1172 * @dentry: The dentry to put the symlink in 1173 * @symname: The thing which the link points to 1174 * 1175 * Returns: errno 1176 */ 1177 1178 static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 1179 const char *symname) 1180 { 1181 unsigned int size; 1182 1183 size = strlen(symname); 1184 if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) 1185 return -ENAMETOOLONG; 1186 1187 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 1188 } 1189 1190 /** 1191 * gfs2_mkdir - Make a directory 1192 * @dir: The parent directory of the new one 1193 * @dentry: The dentry of the new directory 1194 * @mode: The mode of the new directory 1195 * 1196 * Returns: errno 1197 */ 1198 1199 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 1200 { 1201 unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); 1202 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); 1203 } 1204 1205 /** 1206 * gfs2_mknod - Make a special file 1207 * @dir: The directory in which the special file will reside 1208 * @dentry: The dentry of the special file 1209 * @mode: The mode of the special file 1210 * @dev: The device specification of the special file 1211 * 1212 */ 1213 1214 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 1215 dev_t dev) 1216 { 1217 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); 1218 } 1219 1220 /** 1221 * gfs2_atomic_open - Atomically open a file 1222 * @dir: The directory 1223 * @dentry: The proposed new entry 1224 * @file: The proposed new struct file 1225 * @flags: open flags 1226 * @mode: File mode 1227 * 1228 * Returns: error code or 0 for success 1229 */ 1230 1231 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 1232 struct file *file, unsigned flags, 1233 umode_t mode) 1234 { 1235 struct dentry *d; 1236 bool excl = !!(flags & O_EXCL); 1237 1238 if (!d_in_lookup(dentry)) 1239 goto skip_lookup; 1240 1241 d = __gfs2_lookup(dir, dentry, file); 1242 if (IS_ERR(d)) 1243 return PTR_ERR(d); 1244 if (d != NULL) 1245 dentry = d; 1246 if (d_really_is_positive(dentry)) { 1247 if (!(file->f_mode & FMODE_OPENED)) 1248 return finish_no_open(file, d); 1249 dput(d); 1250 return excl && (flags & O_CREAT) ? -EEXIST : 0; 1251 } 1252 1253 BUG_ON(d != NULL); 1254 1255 skip_lookup: 1256 if (!(flags & O_CREAT)) 1257 return -ENOENT; 1258 1259 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); 1260 } 1261 1262 /* 1263 * gfs2_ok_to_move - check if it's ok to move a directory to another directory 1264 * @this: move this 1265 * @to: to here 1266 * 1267 * Follow @to back to the root and make sure we don't encounter @this 1268 * Assumes we already hold the rename lock. 1269 * 1270 * Returns: errno 1271 */ 1272 1273 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 1274 { 1275 struct inode *dir = &to->i_inode; 1276 struct super_block *sb = dir->i_sb; 1277 struct inode *tmp; 1278 int error = 0; 1279 1280 igrab(dir); 1281 1282 for (;;) { 1283 if (dir == &this->i_inode) { 1284 error = -EINVAL; 1285 break; 1286 } 1287 if (dir == d_inode(sb->s_root)) { 1288 error = 0; 1289 break; 1290 } 1291 1292 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 1293 if (!tmp) { 1294 error = -ENOENT; 1295 break; 1296 } 1297 if (IS_ERR(tmp)) { 1298 error = PTR_ERR(tmp); 1299 break; 1300 } 1301 1302 iput(dir); 1303 dir = tmp; 1304 } 1305 1306 iput(dir); 1307 1308 return error; 1309 } 1310 1311 /** 1312 * update_moved_ino - Update an inode that's being moved 1313 * @ip: The inode being moved 1314 * @ndip: The parent directory of the new filename 1315 * @dir_rename: True of ip is a directory 1316 * 1317 * Returns: errno 1318 */ 1319 1320 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1321 int dir_rename) 1322 { 1323 if (dir_rename) 1324 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1325 1326 ip->i_inode.i_ctime = current_time(&ip->i_inode); 1327 mark_inode_dirty_sync(&ip->i_inode); 1328 return 0; 1329 } 1330 1331 1332 /** 1333 * gfs2_rename - Rename a file 1334 * @odir: Parent directory of old file name 1335 * @odentry: The old dentry of the file 1336 * @ndir: Parent directory of new file name 1337 * @ndentry: The new dentry of the file 1338 * 1339 * Returns: errno 1340 */ 1341 1342 static int gfs2_rename(struct inode *odir, struct dentry *odentry, 1343 struct inode *ndir, struct dentry *ndentry) 1344 { 1345 struct gfs2_inode *odip = GFS2_I(odir); 1346 struct gfs2_inode *ndip = GFS2_I(ndir); 1347 struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 1348 struct gfs2_inode *nip = NULL; 1349 struct gfs2_sbd *sdp = GFS2_SB(odir); 1350 struct gfs2_holder ghs[4], r_gh, rd_gh; 1351 struct gfs2_rgrpd *nrgd; 1352 unsigned int num_gh; 1353 int dir_rename = 0; 1354 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 1355 unsigned int x; 1356 int error; 1357 1358 gfs2_holder_mark_uninitialized(&r_gh); 1359 gfs2_holder_mark_uninitialized(&rd_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_qa_get(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, GL_ASYNC, ghs); 1391 if (odip != ndip) { 1392 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, 1393 ghs + num_gh); 1394 num_gh++; 1395 } 1396 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1397 num_gh++; 1398 1399 if (nip) { 1400 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1401 ghs + num_gh); 1402 num_gh++; 1403 } 1404 1405 for (x = 0; x < num_gh; x++) { 1406 error = gfs2_glock_nq(ghs + x); 1407 if (error) 1408 goto out_gunlock; 1409 } 1410 error = gfs2_glock_async_wait(num_gh, ghs); 1411 if (error) 1412 goto out_gunlock; 1413 1414 if (nip) { 1415 /* Grab the resource group glock for unlink flag twiddling. 1416 * This is the case where the target dinode already exists 1417 * so we unlink before doing the rename. 1418 */ 1419 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1420 if (!nrgd) { 1421 error = -ENOENT; 1422 goto out_gunlock; 1423 } 1424 error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, 1425 &rd_gh); 1426 if (error) 1427 goto out_gunlock; 1428 } 1429 1430 error = -ENOENT; 1431 if (ip->i_inode.i_nlink == 0) 1432 goto out_gunlock; 1433 1434 /* Check out the old directory */ 1435 1436 error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 1437 if (error) 1438 goto out_gunlock; 1439 1440 /* Check out the new directory */ 1441 1442 if (nip) { 1443 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1444 if (error) 1445 goto out_gunlock; 1446 1447 if (nip->i_inode.i_nlink == 0) { 1448 error = -EAGAIN; 1449 goto out_gunlock; 1450 } 1451 1452 if (S_ISDIR(nip->i_inode.i_mode)) { 1453 if (nip->i_entries < 2) { 1454 gfs2_consist_inode(nip); 1455 error = -EIO; 1456 goto out_gunlock; 1457 } 1458 if (nip->i_entries > 2) { 1459 error = -ENOTEMPTY; 1460 goto out_gunlock; 1461 } 1462 } 1463 } else { 1464 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 1465 if (error) 1466 goto out_gunlock; 1467 1468 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 1469 switch (error) { 1470 case -ENOENT: 1471 error = 0; 1472 break; 1473 case 0: 1474 error = -EEXIST; 1475 default: 1476 goto out_gunlock; 1477 } 1478 1479 if (odip != ndip) { 1480 if (!ndip->i_inode.i_nlink) { 1481 error = -ENOENT; 1482 goto out_gunlock; 1483 } 1484 if (ndip->i_entries == (u32)-1) { 1485 error = -EFBIG; 1486 goto out_gunlock; 1487 } 1488 if (S_ISDIR(ip->i_inode.i_mode) && 1489 ndip->i_inode.i_nlink == (u32)-1) { 1490 error = -EMLINK; 1491 goto out_gunlock; 1492 } 1493 } 1494 } 1495 1496 /* Check out the dir to be renamed */ 1497 1498 if (dir_rename) { 1499 error = gfs2_permission(d_inode(odentry), MAY_WRITE); 1500 if (error) 1501 goto out_gunlock; 1502 } 1503 1504 if (nip == NULL) { 1505 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 1506 if (error) 1507 goto out_gunlock; 1508 } 1509 1510 if (da.nr_blocks) { 1511 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1512 error = gfs2_quota_lock_check(ndip, &ap); 1513 if (error) 1514 goto out_gunlock; 1515 1516 error = gfs2_inplace_reserve(ndip, &ap); 1517 if (error) 1518 goto out_gunlock_q; 1519 1520 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1521 4 * RES_LEAF + 4, 0); 1522 if (error) 1523 goto out_ipreserv; 1524 } else { 1525 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 1526 5 * RES_LEAF + 4, 0); 1527 if (error) 1528 goto out_gunlock; 1529 } 1530 1531 /* Remove the target file, if it exists */ 1532 1533 if (nip) 1534 error = gfs2_unlink_inode(ndip, ndentry); 1535 1536 error = update_moved_ino(ip, ndip, dir_rename); 1537 if (error) 1538 goto out_end_trans; 1539 1540 error = gfs2_dir_del(odip, odentry); 1541 if (error) 1542 goto out_end_trans; 1543 1544 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 1545 if (error) 1546 goto out_end_trans; 1547 1548 out_end_trans: 1549 gfs2_trans_end(sdp); 1550 out_ipreserv: 1551 if (da.nr_blocks) 1552 gfs2_inplace_release(ndip); 1553 out_gunlock_q: 1554 if (da.nr_blocks) 1555 gfs2_quota_unlock(ndip); 1556 out_gunlock: 1557 gfs2_dir_no_add(&da); 1558 if (gfs2_holder_initialized(&rd_gh)) 1559 gfs2_glock_dq_uninit(&rd_gh); 1560 1561 while (x--) { 1562 if (gfs2_holder_queued(ghs + x)) 1563 gfs2_glock_dq(ghs + x); 1564 gfs2_holder_uninit(ghs + x); 1565 } 1566 out_gunlock_r: 1567 if (gfs2_holder_initialized(&r_gh)) 1568 gfs2_glock_dq_uninit(&r_gh); 1569 out: 1570 gfs2_qa_put(ndip); 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 error = gfs2_qa_get(ip); 1883 if (error) 1884 return error; 1885 1886 error = gfs2_rindex_update(sdp); 1887 if (error) 1888 goto out; 1889 1890 error = gfs2_quota_lock(ip, nuid, ngid); 1891 if (error) 1892 goto out; 1893 1894 ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1895 1896 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 1897 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1898 error = gfs2_quota_check(ip, nuid, ngid, &ap); 1899 if (error) 1900 goto out_gunlock_q; 1901 } 1902 1903 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 1904 if (error) 1905 goto out_gunlock_q; 1906 1907 error = gfs2_setattr_simple(inode, attr); 1908 if (error) 1909 goto out_end_trans; 1910 1911 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 1912 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1913 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1914 gfs2_quota_change(ip, ap.target, nuid, ngid); 1915 } 1916 1917 out_end_trans: 1918 gfs2_trans_end(sdp); 1919 out_gunlock_q: 1920 gfs2_quota_unlock(ip); 1921 out: 1922 gfs2_qa_put(ip); 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_qa_get(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 goto out; 1951 1952 error = -EPERM; 1953 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 1954 goto error; 1955 1956 error = setattr_prepare(dentry, attr); 1957 if (error) 1958 goto error; 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 error: 1971 if (!error) 1972 mark_inode_dirty(inode); 1973 gfs2_glock_dq_uninit(&i_gh); 1974 out: 1975 gfs2_qa_put(ip); 1976 return error; 1977 } 1978 1979 /** 1980 * gfs2_getattr - Read out an inode's attributes 1981 * @path: Object to query 1982 * @stat: The inode's stats 1983 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1984 * @flags: AT_STATX_xxx setting 1985 * 1986 * This may be called from the VFS directly, or from within GFS2 with the 1987 * inode locked, so we look to see if the glock is already locked and only 1988 * lock the glock if its not already been done. Note that its the NFS 1989 * readdirplus operation which causes this to be called (from filldir) 1990 * with the glock already held. 1991 * 1992 * Returns: errno 1993 */ 1994 1995 static int gfs2_getattr(const struct path *path, struct kstat *stat, 1996 u32 request_mask, unsigned int flags) 1997 { 1998 struct inode *inode = d_inode(path->dentry); 1999 struct gfs2_inode *ip = GFS2_I(inode); 2000 struct gfs2_holder gh; 2001 u32 gfsflags; 2002 int error; 2003 2004 gfs2_holder_mark_uninitialized(&gh); 2005 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 2006 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 2007 if (error) 2008 return error; 2009 } 2010 2011 gfsflags = ip->i_diskflags; 2012 if (gfsflags & GFS2_DIF_APPENDONLY) 2013 stat->attributes |= STATX_ATTR_APPEND; 2014 if (gfsflags & GFS2_DIF_IMMUTABLE) 2015 stat->attributes |= STATX_ATTR_IMMUTABLE; 2016 2017 stat->attributes_mask |= (STATX_ATTR_APPEND | 2018 STATX_ATTR_COMPRESSED | 2019 STATX_ATTR_ENCRYPTED | 2020 STATX_ATTR_IMMUTABLE | 2021 STATX_ATTR_NODUMP); 2022 2023 generic_fillattr(inode, stat); 2024 2025 if (gfs2_holder_initialized(&gh)) 2026 gfs2_glock_dq_uninit(&gh); 2027 2028 return 0; 2029 } 2030 2031 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 2032 u64 start, u64 len) 2033 { 2034 struct gfs2_inode *ip = GFS2_I(inode); 2035 struct gfs2_holder gh; 2036 int ret; 2037 2038 inode_lock_shared(inode); 2039 2040 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2041 if (ret) 2042 goto out; 2043 2044 ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 2045 2046 gfs2_glock_dq_uninit(&gh); 2047 2048 out: 2049 inode_unlock_shared(inode); 2050 return ret; 2051 } 2052 2053 loff_t gfs2_seek_data(struct file *file, loff_t offset) 2054 { 2055 struct inode *inode = file->f_mapping->host; 2056 struct gfs2_inode *ip = GFS2_I(inode); 2057 struct gfs2_holder gh; 2058 loff_t ret; 2059 2060 inode_lock_shared(inode); 2061 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2062 if (!ret) 2063 ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 2064 gfs2_glock_dq_uninit(&gh); 2065 inode_unlock_shared(inode); 2066 2067 if (ret < 0) 2068 return ret; 2069 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 2070 } 2071 2072 loff_t gfs2_seek_hole(struct file *file, loff_t offset) 2073 { 2074 struct inode *inode = file->f_mapping->host; 2075 struct gfs2_inode *ip = GFS2_I(inode); 2076 struct gfs2_holder gh; 2077 loff_t ret; 2078 2079 inode_lock_shared(inode); 2080 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2081 if (!ret) 2082 ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 2083 gfs2_glock_dq_uninit(&gh); 2084 inode_unlock_shared(inode); 2085 2086 if (ret < 0) 2087 return ret; 2088 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 2089 } 2090 2091 const struct inode_operations gfs2_file_iops = { 2092 .permission = gfs2_permission, 2093 .setattr = gfs2_setattr, 2094 .getattr = gfs2_getattr, 2095 .listxattr = gfs2_listxattr, 2096 .fiemap = gfs2_fiemap, 2097 .get_acl = gfs2_get_acl, 2098 .set_acl = gfs2_set_acl, 2099 }; 2100 2101 const struct inode_operations gfs2_dir_iops = { 2102 .create = gfs2_create, 2103 .lookup = gfs2_lookup, 2104 .link = gfs2_link, 2105 .unlink = gfs2_unlink, 2106 .symlink = gfs2_symlink, 2107 .mkdir = gfs2_mkdir, 2108 .rmdir = gfs2_unlink, 2109 .mknod = gfs2_mknod, 2110 .rename = gfs2_rename2, 2111 .permission = gfs2_permission, 2112 .setattr = gfs2_setattr, 2113 .getattr = gfs2_getattr, 2114 .listxattr = gfs2_listxattr, 2115 .fiemap = gfs2_fiemap, 2116 .get_acl = gfs2_get_acl, 2117 .set_acl = gfs2_set_acl, 2118 .atomic_open = gfs2_atomic_open, 2119 }; 2120 2121 const struct inode_operations gfs2_symlink_iops = { 2122 .get_link = gfs2_get_link, 2123 .permission = gfs2_permission, 2124 .setattr = gfs2_setattr, 2125 .getattr = gfs2_getattr, 2126 .listxattr = gfs2_listxattr, 2127 .fiemap = gfs2_fiemap, 2128 }; 2129 2130