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/fiemap.h> 21 #include <linux/uaccess.h> 22 23 #include "gfs2.h" 24 #include "incore.h" 25 #include "acl.h" 26 #include "bmap.h" 27 #include "dir.h" 28 #include "xattr.h" 29 #include "glock.h" 30 #include "inode.h" 31 #include "meta_io.h" 32 #include "quota.h" 33 #include "rgrp.h" 34 #include "trans.h" 35 #include "util.h" 36 #include "super.h" 37 #include "glops.h" 38 39 static int iget_test(struct inode *inode, void *opaque) 40 { 41 u64 no_addr = *(u64 *)opaque; 42 43 return GFS2_I(inode)->i_no_addr == no_addr; 44 } 45 46 static int iget_set(struct inode *inode, void *opaque) 47 { 48 u64 no_addr = *(u64 *)opaque; 49 50 GFS2_I(inode)->i_no_addr = no_addr; 51 inode->i_ino = no_addr; 52 return 0; 53 } 54 55 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) 56 { 57 struct inode *inode; 58 59 repeat: 60 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); 61 if (!inode) 62 return inode; 63 if (is_bad_inode(inode)) { 64 iput(inode); 65 goto repeat; 66 } 67 return inode; 68 } 69 70 /** 71 * gfs2_set_iop - Sets inode operations 72 * @inode: The inode with correct i_mode filled in 73 * 74 * GFS2 lookup code fills in vfs inode contents based on info obtained 75 * from directory entry inside gfs2_inode_lookup(). 76 */ 77 78 static void gfs2_set_iop(struct inode *inode) 79 { 80 struct gfs2_sbd *sdp = GFS2_SB(inode); 81 umode_t mode = inode->i_mode; 82 83 if (S_ISREG(mode)) { 84 inode->i_op = &gfs2_file_iops; 85 if (gfs2_localflocks(sdp)) 86 inode->i_fop = &gfs2_file_fops_nolock; 87 else 88 inode->i_fop = &gfs2_file_fops; 89 } else if (S_ISDIR(mode)) { 90 inode->i_op = &gfs2_dir_iops; 91 if (gfs2_localflocks(sdp)) 92 inode->i_fop = &gfs2_dir_fops_nolock; 93 else 94 inode->i_fop = &gfs2_dir_fops; 95 } else if (S_ISLNK(mode)) { 96 inode->i_op = &gfs2_symlink_iops; 97 } else { 98 inode->i_op = &gfs2_file_iops; 99 init_special_inode(inode, inode->i_mode, inode->i_rdev); 100 } 101 } 102 103 /** 104 * gfs2_inode_lookup - Lookup an inode 105 * @sb: The super block 106 * @type: The type of the inode 107 * @no_addr: The inode number 108 * @no_formal_ino: The inode generation number 109 * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; 110 * GFS2_BLKST_FREE to indicate not to verify) 111 * 112 * If @type is DT_UNKNOWN, the inode type is fetched from disk. 113 * 114 * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a 115 * placeholder because it doesn't otherwise make sense), the on-disk block type 116 * is verified to be @blktype. 117 * 118 * Returns: A VFS inode, or an error 119 */ 120 121 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 122 u64 no_addr, u64 no_formal_ino, 123 unsigned int blktype) 124 { 125 struct inode *inode; 126 struct gfs2_inode *ip; 127 struct gfs2_glock *io_gl = NULL; 128 struct gfs2_holder i_gh; 129 int error; 130 131 gfs2_holder_mark_uninitialized(&i_gh); 132 inode = gfs2_iget(sb, no_addr); 133 if (!inode) 134 return ERR_PTR(-ENOMEM); 135 136 ip = GFS2_I(inode); 137 138 if (inode->i_state & I_NEW) { 139 struct gfs2_sbd *sdp = GFS2_SB(inode); 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; 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; 160 161 if (blktype != GFS2_BLKST_FREE) { 162 error = gfs2_check_blk_type(sdp, no_addr, 163 blktype); 164 if (error) 165 goto fail; 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; 174 glock_set_object(ip->i_iopen_gh.gh_gl, ip); 175 gfs2_glock_put(io_gl); 176 io_gl = NULL; 177 178 /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ 179 inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); 180 inode->i_atime.tv_nsec = 0; 181 182 if (type == DT_UNKNOWN) { 183 /* Inode glock must be locked already */ 184 error = gfs2_inode_refresh(GFS2_I(inode)); 185 if (error) 186 goto fail; 187 } else { 188 ip->i_no_formal_ino = no_formal_ino; 189 inode->i_mode = DT2IF(type); 190 } 191 192 gfs2_set_iop(inode); 193 194 unlock_new_inode(inode); 195 } 196 197 if (gfs2_holder_initialized(&i_gh)) 198 gfs2_glock_dq_uninit(&i_gh); 199 return inode; 200 201 fail: 202 if (io_gl) 203 gfs2_glock_put(io_gl); 204 if (gfs2_holder_initialized(&i_gh)) 205 gfs2_glock_dq_uninit(&i_gh); 206 iget_failed(inode); 207 return ERR_PTR(error); 208 } 209 210 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 211 u64 *no_formal_ino, unsigned int blktype) 212 { 213 struct super_block *sb = sdp->sd_vfs; 214 struct inode *inode; 215 int error; 216 217 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype); 218 if (IS_ERR(inode)) 219 return inode; 220 221 /* Two extra checks for NFS only */ 222 if (no_formal_ino) { 223 error = -ESTALE; 224 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) 225 goto fail_iput; 226 227 error = -EIO; 228 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 229 goto fail_iput; 230 } 231 return inode; 232 233 fail_iput: 234 iput(inode); 235 return ERR_PTR(error); 236 } 237 238 239 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 240 { 241 struct qstr qstr; 242 struct inode *inode; 243 gfs2_str2qstr(&qstr, name); 244 inode = gfs2_lookupi(dip, &qstr, 1); 245 /* gfs2_lookupi has inconsistent callers: vfs 246 * related routines expect NULL for no entry found, 247 * gfs2_lookup_simple callers expect ENOENT 248 * and do not check for NULL. 249 */ 250 if (inode == NULL) 251 return ERR_PTR(-ENOENT); 252 else 253 return inode; 254 } 255 256 257 /** 258 * gfs2_lookupi - Look up a filename in a directory and return its inode 259 * @d_gh: An initialized holder for the directory glock 260 * @name: The name of the inode to look for 261 * @is_root: If 1, ignore the caller's permissions 262 * @i_gh: An uninitialized holder for the new inode glock 263 * 264 * This can be called via the VFS filldir function when NFS is doing 265 * a readdirplus and the inode which its intending to stat isn't 266 * already in cache. In this case we must not take the directory glock 267 * again, since the readdir call will have already taken that lock. 268 * 269 * Returns: errno 270 */ 271 272 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 273 int is_root) 274 { 275 struct super_block *sb = dir->i_sb; 276 struct gfs2_inode *dip = GFS2_I(dir); 277 struct gfs2_holder d_gh; 278 int error = 0; 279 struct inode *inode = NULL; 280 281 gfs2_holder_mark_uninitialized(&d_gh); 282 if (!name->len || name->len > GFS2_FNAMESIZE) 283 return ERR_PTR(-ENAMETOOLONG); 284 285 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 286 (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 287 dir == d_inode(sb->s_root))) { 288 igrab(dir); 289 return dir; 290 } 291 292 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 293 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 294 if (error) 295 return ERR_PTR(error); 296 } 297 298 if (!is_root) { 299 error = gfs2_permission(dir, MAY_EXEC); 300 if (error) 301 goto out; 302 } 303 304 inode = gfs2_dir_search(dir, name, false); 305 if (IS_ERR(inode)) 306 error = PTR_ERR(inode); 307 out: 308 if (gfs2_holder_initialized(&d_gh)) 309 gfs2_glock_dq_uninit(&d_gh); 310 if (error == -ENOENT) 311 return NULL; 312 return inode ? inode : ERR_PTR(error); 313 } 314 315 /** 316 * create_ok - OK to create a new on-disk inode here? 317 * @dip: Directory in which dinode is to be created 318 * @name: Name of new dinode 319 * @mode: 320 * 321 * Returns: errno 322 */ 323 324 static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 325 umode_t mode) 326 { 327 int error; 328 329 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 330 if (error) 331 return error; 332 333 /* Don't create entries in an unlinked directory */ 334 if (!dip->i_inode.i_nlink) 335 return -ENOENT; 336 337 if (dip->i_entries == (u32)-1) 338 return -EFBIG; 339 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 340 return -EMLINK; 341 342 return 0; 343 } 344 345 static void munge_mode_uid_gid(const struct gfs2_inode *dip, 346 struct inode *inode) 347 { 348 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 349 (dip->i_inode.i_mode & S_ISUID) && 350 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 351 if (S_ISDIR(inode->i_mode)) 352 inode->i_mode |= S_ISUID; 353 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 354 inode->i_mode &= ~07111; 355 inode->i_uid = dip->i_inode.i_uid; 356 } else 357 inode->i_uid = current_fsuid(); 358 359 if (dip->i_inode.i_mode & S_ISGID) { 360 if (S_ISDIR(inode->i_mode)) 361 inode->i_mode |= S_ISGID; 362 inode->i_gid = dip->i_inode.i_gid; 363 } else 364 inode->i_gid = current_fsgid(); 365 } 366 367 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 368 { 369 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 370 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 371 int error; 372 373 error = gfs2_quota_lock_check(ip, &ap); 374 if (error) 375 goto out; 376 377 error = gfs2_inplace_reserve(ip, &ap); 378 if (error) 379 goto out_quota; 380 381 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 382 if (error) 383 goto out_ipreserv; 384 385 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 386 ip->i_no_formal_ino = ip->i_generation; 387 ip->i_inode.i_ino = ip->i_no_addr; 388 ip->i_goal = ip->i_no_addr; 389 390 gfs2_trans_end(sdp); 391 392 out_ipreserv: 393 gfs2_inplace_release(ip); 394 out_quota: 395 gfs2_quota_unlock(ip); 396 out: 397 return error; 398 } 399 400 static void gfs2_init_dir(struct buffer_head *dibh, 401 const struct gfs2_inode *parent) 402 { 403 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 404 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 405 406 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 407 dent->de_inum = di->di_num; /* already GFS2 endian */ 408 dent->de_type = cpu_to_be16(DT_DIR); 409 410 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 411 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 412 gfs2_inum_out(parent, dent); 413 dent->de_type = cpu_to_be16(DT_DIR); 414 415 } 416 417 /** 418 * gfs2_init_xattr - Initialise an xattr block for a new inode 419 * @ip: The inode in question 420 * 421 * This sets up an empty xattr block for a new inode, ready to 422 * take any ACLs, LSM xattrs, etc. 423 */ 424 425 static void gfs2_init_xattr(struct gfs2_inode *ip) 426 { 427 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 428 struct buffer_head *bh; 429 struct gfs2_ea_header *ea; 430 431 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 432 gfs2_trans_add_meta(ip->i_gl, bh); 433 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 434 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 435 436 ea = GFS2_EA_BH2FIRST(bh); 437 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 438 ea->ea_type = GFS2_EATYPE_UNUSED; 439 ea->ea_flags = GFS2_EAFLAG_LAST; 440 441 brelse(bh); 442 } 443 444 /** 445 * init_dinode - Fill in a new dinode structure 446 * @dip: The directory this inode is being created in 447 * @ip: The inode 448 * @symname: The symlink destination (if a symlink) 449 * @bhp: The buffer head (returned to caller) 450 * 451 */ 452 453 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 454 const char *symname) 455 { 456 struct gfs2_dinode *di; 457 struct buffer_head *dibh; 458 459 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 460 gfs2_trans_add_meta(ip->i_gl, dibh); 461 di = (struct gfs2_dinode *)dibh->b_data; 462 gfs2_dinode_out(ip, di); 463 464 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); 465 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); 466 di->__pad1 = 0; 467 di->__pad2 = 0; 468 di->__pad3 = 0; 469 memset(&di->__pad4, 0, sizeof(di->__pad4)); 470 memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 471 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 472 473 switch(ip->i_inode.i_mode & S_IFMT) { 474 case S_IFDIR: 475 gfs2_init_dir(dibh, dip); 476 break; 477 case S_IFLNK: 478 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 479 break; 480 } 481 482 set_buffer_uptodate(dibh); 483 brelse(dibh); 484 } 485 486 /** 487 * gfs2_trans_da_blocks - Calculate number of blocks to link inode 488 * @dip: The directory we are linking into 489 * @da: The dir add information 490 * @nr_inodes: The number of inodes involved 491 * 492 * This calculate the number of blocks we need to reserve in a 493 * transaction to link @nr_inodes into a directory. In most cases 494 * @nr_inodes will be 2 (the directory plus the inode being linked in) 495 * but in case of rename, 4 may be required. 496 * 497 * Returns: Number of blocks 498 */ 499 500 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 501 const struct gfs2_diradd *da, 502 unsigned nr_inodes) 503 { 504 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 505 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 506 } 507 508 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 509 struct gfs2_inode *ip, struct gfs2_diradd *da) 510 { 511 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 512 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 513 int error; 514 515 if (da->nr_blocks) { 516 error = gfs2_quota_lock_check(dip, &ap); 517 if (error) 518 goto fail_quota_locks; 519 520 error = gfs2_inplace_reserve(dip, &ap); 521 if (error) 522 goto fail_quota_locks; 523 524 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 525 if (error) 526 goto fail_ipreserv; 527 } else { 528 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 529 if (error) 530 goto fail_quota_locks; 531 } 532 533 error = gfs2_dir_add(&dip->i_inode, name, ip, da); 534 535 gfs2_trans_end(sdp); 536 fail_ipreserv: 537 gfs2_inplace_release(dip); 538 fail_quota_locks: 539 gfs2_quota_unlock(dip); 540 return error; 541 } 542 543 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 544 void *fs_info) 545 { 546 const struct xattr *xattr; 547 int err = 0; 548 549 for (xattr = xattr_array; xattr->name != NULL; xattr++) { 550 err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 551 xattr->value_len, 0, 552 GFS2_EATYPE_SECURITY); 553 if (err < 0) 554 break; 555 } 556 return err; 557 } 558 559 /** 560 * gfs2_create_inode - Create a new inode 561 * @dir: The parent directory 562 * @dentry: The new dentry 563 * @file: If non-NULL, the file which is being opened 564 * @mode: The permissions on the new inode 565 * @dev: For device nodes, this is the device number 566 * @symname: For symlinks, this is the link destination 567 * @size: The initial size of the inode (ignored for directories) 568 * 569 * Returns: 0 on success, or error code 570 */ 571 572 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 573 struct file *file, 574 umode_t mode, dev_t dev, const char *symname, 575 unsigned int size, int excl) 576 { 577 const struct qstr *name = &dentry->d_name; 578 struct posix_acl *default_acl, *acl; 579 struct gfs2_holder ghs[2]; 580 struct inode *inode = NULL; 581 struct gfs2_inode *dip = GFS2_I(dir), *ip; 582 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 583 struct gfs2_glock *io_gl = NULL; 584 int error, free_vfs_inode = 1; 585 u32 aflags = 0; 586 unsigned blocks = 1; 587 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 588 589 if (!name->len || name->len > GFS2_FNAMESIZE) 590 return -ENAMETOOLONG; 591 592 error = gfs2_qa_get(dip); 593 if (error) 594 return error; 595 596 error = gfs2_rindex_update(sdp); 597 if (error) 598 goto fail; 599 600 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 601 if (error) 602 goto fail; 603 gfs2_holder_mark_uninitialized(ghs + 1); 604 605 error = create_ok(dip, name, mode); 606 if (error) 607 goto fail_gunlock; 608 609 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 610 error = PTR_ERR(inode); 611 if (!IS_ERR(inode)) { 612 if (S_ISDIR(inode->i_mode)) { 613 iput(inode); 614 inode = ERR_PTR(-EISDIR); 615 goto fail_gunlock; 616 } 617 d_instantiate(dentry, inode); 618 error = 0; 619 if (file) { 620 if (S_ISREG(inode->i_mode)) 621 error = finish_open(file, dentry, gfs2_open_common); 622 else 623 error = finish_no_open(file, NULL); 624 } 625 gfs2_glock_dq_uninit(ghs); 626 goto fail; 627 } else if (error != -ENOENT) { 628 goto fail_gunlock; 629 } 630 631 error = gfs2_diradd_alloc_required(dir, name, &da); 632 if (error < 0) 633 goto fail_gunlock; 634 635 inode = new_inode(sdp->sd_vfs); 636 error = -ENOMEM; 637 if (!inode) 638 goto fail_gunlock; 639 640 error = posix_acl_create(dir, &mode, &default_acl, &acl); 641 if (error) 642 goto fail_gunlock; 643 644 ip = GFS2_I(inode); 645 error = gfs2_qa_get(ip); 646 if (error) 647 goto fail_free_acls; 648 649 inode->i_mode = mode; 650 set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 651 inode->i_rdev = dev; 652 inode->i_size = size; 653 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 654 munge_mode_uid_gid(dip, inode); 655 check_and_update_goal(dip); 656 ip->i_goal = dip->i_goal; 657 ip->i_diskflags = 0; 658 ip->i_eattr = 0; 659 ip->i_height = 0; 660 ip->i_depth = 0; 661 ip->i_entries = 0; 662 ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 663 664 switch(mode & S_IFMT) { 665 case S_IFREG: 666 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 667 gfs2_tune_get(sdp, gt_new_files_jdata)) 668 ip->i_diskflags |= GFS2_DIF_JDATA; 669 gfs2_set_aops(inode); 670 break; 671 case S_IFDIR: 672 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 673 ip->i_diskflags |= GFS2_DIF_JDATA; 674 ip->i_entries = 2; 675 break; 676 } 677 678 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 679 if (dip->i_diskflags & GFS2_DIF_SYSTEM) 680 ip->i_diskflags |= GFS2_DIF_SYSTEM; 681 682 gfs2_set_inode_flags(inode); 683 684 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 685 (dip->i_diskflags & GFS2_DIF_TOPDIR)) 686 aflags |= GFS2_AF_ORLOV; 687 688 if (default_acl || acl) 689 blocks++; 690 691 error = alloc_dinode(ip, aflags, &blocks); 692 if (error) 693 goto fail_free_inode; 694 695 gfs2_set_inode_blocks(inode, blocks); 696 697 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 698 if (error) 699 goto fail_free_inode; 700 flush_delayed_work(&ip->i_gl->gl_work); 701 glock_set_object(ip->i_gl, ip); 702 703 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 704 if (error) 705 goto fail_free_inode; 706 707 error = gfs2_trans_begin(sdp, blocks, 0); 708 if (error) 709 goto fail_free_inode; 710 711 if (blocks > 1) { 712 ip->i_eattr = ip->i_no_addr + 1; 713 gfs2_init_xattr(ip); 714 } 715 init_dinode(dip, ip, symname); 716 gfs2_trans_end(sdp); 717 718 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 719 if (error) 720 goto fail_free_inode; 721 722 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); 723 724 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 725 if (error) 726 goto fail_gunlock2; 727 728 glock_set_object(ip->i_iopen_gh.gh_gl, ip); 729 gfs2_set_iop(inode); 730 insert_inode_hash(inode); 731 732 free_vfs_inode = 0; /* After this point, the inode is no longer 733 considered free. Any failures need to undo 734 the gfs2 structures. */ 735 if (default_acl) { 736 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 737 if (error) 738 goto fail_gunlock3; 739 posix_acl_release(default_acl); 740 default_acl = NULL; 741 } 742 if (acl) { 743 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 744 if (error) 745 goto fail_gunlock3; 746 posix_acl_release(acl); 747 acl = NULL; 748 } 749 750 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 751 &gfs2_initxattrs, NULL); 752 if (error) 753 goto fail_gunlock3; 754 755 error = link_dinode(dip, name, ip, &da); 756 if (error) 757 goto fail_gunlock3; 758 759 mark_inode_dirty(inode); 760 d_instantiate(dentry, inode); 761 /* After instantiate, errors should result in evict which will destroy 762 * both inode and iopen glocks properly. */ 763 if (file) { 764 file->f_mode |= FMODE_CREATED; 765 error = finish_open(file, dentry, gfs2_open_common); 766 } 767 gfs2_glock_dq_uninit(ghs); 768 gfs2_qa_put(ip); 769 gfs2_glock_dq_uninit(ghs + 1); 770 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); 771 gfs2_glock_put(io_gl); 772 gfs2_qa_put(dip); 773 return error; 774 775 fail_gunlock3: 776 glock_clear_object(io_gl, ip); 777 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 778 fail_gunlock2: 779 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); 780 gfs2_glock_put(io_gl); 781 fail_free_inode: 782 if (ip->i_gl) { 783 glock_clear_object(ip->i_gl, ip); 784 gfs2_glock_put(ip->i_gl); 785 } 786 gfs2_rs_delete(ip, NULL); 787 gfs2_qa_put(ip); 788 fail_free_acls: 789 posix_acl_release(default_acl); 790 posix_acl_release(acl); 791 fail_gunlock: 792 gfs2_dir_no_add(&da); 793 gfs2_glock_dq_uninit(ghs); 794 if (!IS_ERR_OR_NULL(inode)) { 795 clear_nlink(inode); 796 if (!free_vfs_inode) 797 mark_inode_dirty(inode); 798 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, 799 &GFS2_I(inode)->i_flags); 800 iput(inode); 801 } 802 if (gfs2_holder_initialized(ghs + 1)) 803 gfs2_glock_dq_uninit(ghs + 1); 804 fail: 805 gfs2_qa_put(dip); 806 return error; 807 } 808 809 /** 810 * gfs2_create - Create a file 811 * @dir: The directory in which to create the file 812 * @dentry: The dentry of the new file 813 * @mode: The mode of the new file 814 * 815 * Returns: errno 816 */ 817 818 static int gfs2_create(struct inode *dir, struct dentry *dentry, 819 umode_t mode, bool excl) 820 { 821 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); 822 } 823 824 /** 825 * __gfs2_lookup - Look up a filename in a directory and return its inode 826 * @dir: The directory inode 827 * @dentry: The dentry of the new inode 828 * @file: File to be opened 829 * 830 * 831 * Returns: errno 832 */ 833 834 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 835 struct file *file) 836 { 837 struct inode *inode; 838 struct dentry *d; 839 struct gfs2_holder gh; 840 struct gfs2_glock *gl; 841 int error; 842 843 inode = gfs2_lookupi(dir, &dentry->d_name, 0); 844 if (inode == NULL) { 845 d_add(dentry, NULL); 846 return NULL; 847 } 848 if (IS_ERR(inode)) 849 return ERR_CAST(inode); 850 851 gl = GFS2_I(inode)->i_gl; 852 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 853 if (error) { 854 iput(inode); 855 return ERR_PTR(error); 856 } 857 858 d = d_splice_alias(inode, dentry); 859 if (IS_ERR(d)) { 860 gfs2_glock_dq_uninit(&gh); 861 return d; 862 } 863 if (file && S_ISREG(inode->i_mode)) 864 error = finish_open(file, dentry, gfs2_open_common); 865 866 gfs2_glock_dq_uninit(&gh); 867 if (error) { 868 dput(d); 869 return ERR_PTR(error); 870 } 871 return d; 872 } 873 874 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 875 unsigned flags) 876 { 877 return __gfs2_lookup(dir, dentry, NULL); 878 } 879 880 /** 881 * gfs2_link - Link to a file 882 * @old_dentry: The inode to link 883 * @dir: Add link to this directory 884 * @dentry: The name of the link 885 * 886 * Link the inode in "old_dentry" into the directory "dir" with the 887 * name in "dentry". 888 * 889 * Returns: errno 890 */ 891 892 static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 893 struct dentry *dentry) 894 { 895 struct gfs2_inode *dip = GFS2_I(dir); 896 struct gfs2_sbd *sdp = GFS2_SB(dir); 897 struct inode *inode = d_inode(old_dentry); 898 struct gfs2_inode *ip = GFS2_I(inode); 899 struct gfs2_holder ghs[2]; 900 struct buffer_head *dibh; 901 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 902 int error; 903 904 if (S_ISDIR(inode->i_mode)) 905 return -EPERM; 906 907 error = gfs2_qa_get(dip); 908 if (error) 909 return error; 910 911 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 912 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 913 914 error = gfs2_glock_nq(ghs); /* parent */ 915 if (error) 916 goto out_parent; 917 918 error = gfs2_glock_nq(ghs + 1); /* child */ 919 if (error) 920 goto out_child; 921 922 error = -ENOENT; 923 if (inode->i_nlink == 0) 924 goto out_gunlock; 925 926 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 927 if (error) 928 goto out_gunlock; 929 930 error = gfs2_dir_check(dir, &dentry->d_name, NULL); 931 switch (error) { 932 case -ENOENT: 933 break; 934 case 0: 935 error = -EEXIST; 936 default: 937 goto out_gunlock; 938 } 939 940 error = -EINVAL; 941 if (!dip->i_inode.i_nlink) 942 goto out_gunlock; 943 error = -EFBIG; 944 if (dip->i_entries == (u32)-1) 945 goto out_gunlock; 946 error = -EPERM; 947 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 948 goto out_gunlock; 949 error = -EINVAL; 950 if (!ip->i_inode.i_nlink) 951 goto out_gunlock; 952 error = -EMLINK; 953 if (ip->i_inode.i_nlink == (u32)-1) 954 goto out_gunlock; 955 956 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 957 if (error < 0) 958 goto out_gunlock; 959 960 if (da.nr_blocks) { 961 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 962 error = gfs2_quota_lock_check(dip, &ap); 963 if (error) 964 goto out_gunlock; 965 966 error = gfs2_inplace_reserve(dip, &ap); 967 if (error) 968 goto out_gunlock_q; 969 970 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 971 if (error) 972 goto out_ipres; 973 } else { 974 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 975 if (error) 976 goto out_ipres; 977 } 978 979 error = gfs2_meta_inode_buffer(ip, &dibh); 980 if (error) 981 goto out_end_trans; 982 983 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 984 if (error) 985 goto out_brelse; 986 987 gfs2_trans_add_meta(ip->i_gl, dibh); 988 inc_nlink(&ip->i_inode); 989 ip->i_inode.i_ctime = current_time(&ip->i_inode); 990 ihold(inode); 991 d_instantiate(dentry, inode); 992 mark_inode_dirty(inode); 993 994 out_brelse: 995 brelse(dibh); 996 out_end_trans: 997 gfs2_trans_end(sdp); 998 out_ipres: 999 if (da.nr_blocks) 1000 gfs2_inplace_release(dip); 1001 out_gunlock_q: 1002 if (da.nr_blocks) 1003 gfs2_quota_unlock(dip); 1004 out_gunlock: 1005 gfs2_dir_no_add(&da); 1006 gfs2_glock_dq(ghs + 1); 1007 out_child: 1008 gfs2_glock_dq(ghs); 1009 out_parent: 1010 gfs2_qa_put(dip); 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 excl && (flags & O_CREAT) ? -EEXIST : 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_qa_get(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 gfs2_qa_put(ndip); 1572 return error; 1573 } 1574 1575 /** 1576 * gfs2_exchange - exchange two files 1577 * @odir: Parent directory of old file name 1578 * @odentry: The old dentry of the file 1579 * @ndir: Parent directory of new file name 1580 * @ndentry: The new dentry of the file 1581 * @flags: The rename flags 1582 * 1583 * Returns: errno 1584 */ 1585 1586 static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1587 struct inode *ndir, struct dentry *ndentry, 1588 unsigned int flags) 1589 { 1590 struct gfs2_inode *odip = GFS2_I(odir); 1591 struct gfs2_inode *ndip = GFS2_I(ndir); 1592 struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1593 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1594 struct gfs2_sbd *sdp = GFS2_SB(odir); 1595 struct gfs2_holder ghs[4], r_gh; 1596 unsigned int num_gh; 1597 unsigned int x; 1598 umode_t old_mode = oip->i_inode.i_mode; 1599 umode_t new_mode = nip->i_inode.i_mode; 1600 int error; 1601 1602 gfs2_holder_mark_uninitialized(&r_gh); 1603 error = gfs2_rindex_update(sdp); 1604 if (error) 1605 return error; 1606 1607 if (odip != ndip) { 1608 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1609 0, &r_gh); 1610 if (error) 1611 goto out; 1612 1613 if (S_ISDIR(old_mode)) { 1614 /* don't move a directory into its subdir */ 1615 error = gfs2_ok_to_move(oip, ndip); 1616 if (error) 1617 goto out_gunlock_r; 1618 } 1619 1620 if (S_ISDIR(new_mode)) { 1621 /* don't move a directory into its subdir */ 1622 error = gfs2_ok_to_move(nip, odip); 1623 if (error) 1624 goto out_gunlock_r; 1625 } 1626 } 1627 1628 num_gh = 1; 1629 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 1630 if (odip != ndip) { 1631 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1632 ghs + num_gh); 1633 num_gh++; 1634 } 1635 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1636 num_gh++; 1637 1638 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1639 num_gh++; 1640 1641 for (x = 0; x < num_gh; x++) { 1642 error = gfs2_glock_nq(ghs + x); 1643 if (error) 1644 goto out_gunlock; 1645 } 1646 1647 error = gfs2_glock_async_wait(num_gh, ghs); 1648 if (error) 1649 goto out_gunlock; 1650 1651 error = -ENOENT; 1652 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1653 goto out_gunlock; 1654 1655 error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1656 if (error) 1657 goto out_gunlock; 1658 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1659 if (error) 1660 goto out_gunlock; 1661 1662 if (S_ISDIR(old_mode)) { 1663 error = gfs2_permission(odentry->d_inode, MAY_WRITE); 1664 if (error) 1665 goto out_gunlock; 1666 } 1667 if (S_ISDIR(new_mode)) { 1668 error = gfs2_permission(ndentry->d_inode, MAY_WRITE); 1669 if (error) 1670 goto out_gunlock; 1671 } 1672 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1673 if (error) 1674 goto out_gunlock; 1675 1676 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1677 if (error) 1678 goto out_end_trans; 1679 1680 error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1681 if (error) 1682 goto out_end_trans; 1683 1684 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1685 IF2DT(old_mode)); 1686 if (error) 1687 goto out_end_trans; 1688 1689 error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1690 IF2DT(new_mode)); 1691 if (error) 1692 goto out_end_trans; 1693 1694 if (odip != ndip) { 1695 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1696 inc_nlink(&odip->i_inode); 1697 drop_nlink(&ndip->i_inode); 1698 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1699 inc_nlink(&ndip->i_inode); 1700 drop_nlink(&odip->i_inode); 1701 } 1702 } 1703 mark_inode_dirty(&ndip->i_inode); 1704 if (odip != ndip) 1705 mark_inode_dirty(&odip->i_inode); 1706 1707 out_end_trans: 1708 gfs2_trans_end(sdp); 1709 out_gunlock: 1710 while (x--) { 1711 if (gfs2_holder_queued(ghs + x)) 1712 gfs2_glock_dq(ghs + x); 1713 gfs2_holder_uninit(ghs + x); 1714 } 1715 out_gunlock_r: 1716 if (gfs2_holder_initialized(&r_gh)) 1717 gfs2_glock_dq_uninit(&r_gh); 1718 out: 1719 return error; 1720 } 1721 1722 static int gfs2_rename2(struct inode *odir, struct dentry *odentry, 1723 struct inode *ndir, struct dentry *ndentry, 1724 unsigned int flags) 1725 { 1726 flags &= ~RENAME_NOREPLACE; 1727 1728 if (flags & ~RENAME_EXCHANGE) 1729 return -EINVAL; 1730 1731 if (flags & RENAME_EXCHANGE) 1732 return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1733 1734 return gfs2_rename(odir, odentry, ndir, ndentry); 1735 } 1736 1737 /** 1738 * gfs2_get_link - Follow a symbolic link 1739 * @dentry: The dentry of the link 1740 * @inode: The inode of the link 1741 * @done: destructor for return value 1742 * 1743 * This can handle symlinks of any size. 1744 * 1745 * Returns: 0 on success or error code 1746 */ 1747 1748 static const char *gfs2_get_link(struct dentry *dentry, 1749 struct inode *inode, 1750 struct delayed_call *done) 1751 { 1752 struct gfs2_inode *ip = GFS2_I(inode); 1753 struct gfs2_holder i_gh; 1754 struct buffer_head *dibh; 1755 unsigned int size; 1756 char *buf; 1757 int error; 1758 1759 if (!dentry) 1760 return ERR_PTR(-ECHILD); 1761 1762 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 1763 error = gfs2_glock_nq(&i_gh); 1764 if (error) { 1765 gfs2_holder_uninit(&i_gh); 1766 return ERR_PTR(error); 1767 } 1768 1769 size = (unsigned int)i_size_read(&ip->i_inode); 1770 if (size == 0) { 1771 gfs2_consist_inode(ip); 1772 buf = ERR_PTR(-EIO); 1773 goto out; 1774 } 1775 1776 error = gfs2_meta_inode_buffer(ip, &dibh); 1777 if (error) { 1778 buf = ERR_PTR(error); 1779 goto out; 1780 } 1781 1782 buf = kzalloc(size + 1, GFP_NOFS); 1783 if (!buf) 1784 buf = ERR_PTR(-ENOMEM); 1785 else 1786 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 1787 brelse(dibh); 1788 out: 1789 gfs2_glock_dq_uninit(&i_gh); 1790 if (!IS_ERR(buf)) 1791 set_delayed_call(done, kfree_link, buf); 1792 return buf; 1793 } 1794 1795 /** 1796 * gfs2_permission - 1797 * @inode: The inode 1798 * @mask: The mask to be tested 1799 * @flags: Indicates whether this is an RCU path walk or not 1800 * 1801 * This may be called from the VFS directly, or from within GFS2 with the 1802 * inode locked, so we look to see if the glock is already locked and only 1803 * lock the glock if its not already been done. 1804 * 1805 * Returns: errno 1806 */ 1807 1808 int gfs2_permission(struct inode *inode, int mask) 1809 { 1810 struct gfs2_inode *ip; 1811 struct gfs2_holder i_gh; 1812 int error; 1813 1814 gfs2_holder_mark_uninitialized(&i_gh); 1815 ip = GFS2_I(inode); 1816 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 1817 if (mask & MAY_NOT_BLOCK) 1818 return -ECHILD; 1819 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 1820 if (error) 1821 return error; 1822 } 1823 1824 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1825 error = -EPERM; 1826 else 1827 error = generic_permission(inode, mask); 1828 if (gfs2_holder_initialized(&i_gh)) 1829 gfs2_glock_dq_uninit(&i_gh); 1830 1831 return error; 1832 } 1833 1834 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 1835 { 1836 setattr_copy(inode, attr); 1837 mark_inode_dirty(inode); 1838 return 0; 1839 } 1840 1841 /** 1842 * gfs2_setattr_simple - 1843 * @ip: 1844 * @attr: 1845 * 1846 * Returns: errno 1847 */ 1848 1849 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 1850 { 1851 int error; 1852 1853 if (current->journal_info) 1854 return __gfs2_setattr_simple(inode, attr); 1855 1856 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 1857 if (error) 1858 return error; 1859 1860 error = __gfs2_setattr_simple(inode, attr); 1861 gfs2_trans_end(GFS2_SB(inode)); 1862 return error; 1863 } 1864 1865 static int setattr_chown(struct inode *inode, struct iattr *attr) 1866 { 1867 struct gfs2_inode *ip = GFS2_I(inode); 1868 struct gfs2_sbd *sdp = GFS2_SB(inode); 1869 kuid_t ouid, nuid; 1870 kgid_t ogid, ngid; 1871 int error; 1872 struct gfs2_alloc_parms ap; 1873 1874 ouid = inode->i_uid; 1875 ogid = inode->i_gid; 1876 nuid = attr->ia_uid; 1877 ngid = attr->ia_gid; 1878 1879 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1880 ouid = nuid = NO_UID_QUOTA_CHANGE; 1881 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1882 ogid = ngid = NO_GID_QUOTA_CHANGE; 1883 error = gfs2_qa_get(ip); 1884 if (error) 1885 return error; 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 gfs2_qa_put(ip); 1924 return error; 1925 } 1926 1927 /** 1928 * gfs2_setattr - Change attributes on an inode 1929 * @dentry: The dentry which is changing 1930 * @attr: The structure describing the change 1931 * 1932 * The VFS layer wants to change one or more of an inodes attributes. Write 1933 * that change out to disk. 1934 * 1935 * Returns: errno 1936 */ 1937 1938 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 1939 { 1940 struct inode *inode = d_inode(dentry); 1941 struct gfs2_inode *ip = GFS2_I(inode); 1942 struct gfs2_holder i_gh; 1943 int error; 1944 1945 error = gfs2_qa_get(ip); 1946 if (error) 1947 return error; 1948 1949 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 1950 if (error) 1951 goto out; 1952 1953 error = -EPERM; 1954 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 1955 goto error; 1956 1957 error = setattr_prepare(dentry, attr); 1958 if (error) 1959 goto error; 1960 1961 if (attr->ia_valid & ATTR_SIZE) 1962 error = gfs2_setattr_size(inode, attr->ia_size); 1963 else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 1964 error = setattr_chown(inode, attr); 1965 else { 1966 error = gfs2_setattr_simple(inode, attr); 1967 if (!error && attr->ia_valid & ATTR_MODE) 1968 error = posix_acl_chmod(inode, inode->i_mode); 1969 } 1970 1971 error: 1972 if (!error) 1973 mark_inode_dirty(inode); 1974 gfs2_glock_dq_uninit(&i_gh); 1975 out: 1976 gfs2_qa_put(ip); 1977 return error; 1978 } 1979 1980 /** 1981 * gfs2_getattr - Read out an inode's attributes 1982 * @path: Object to query 1983 * @stat: The inode's stats 1984 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1985 * @flags: AT_STATX_xxx setting 1986 * 1987 * This may be called from the VFS directly, or from within GFS2 with the 1988 * inode locked, so we look to see if the glock is already locked and only 1989 * lock the glock if its not already been done. Note that its the NFS 1990 * readdirplus operation which causes this to be called (from filldir) 1991 * with the glock already held. 1992 * 1993 * Returns: errno 1994 */ 1995 1996 static int gfs2_getattr(const struct path *path, struct kstat *stat, 1997 u32 request_mask, unsigned int flags) 1998 { 1999 struct inode *inode = d_inode(path->dentry); 2000 struct gfs2_inode *ip = GFS2_I(inode); 2001 struct gfs2_holder gh; 2002 u32 gfsflags; 2003 int error; 2004 2005 gfs2_holder_mark_uninitialized(&gh); 2006 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 2007 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 2008 if (error) 2009 return error; 2010 } 2011 2012 gfsflags = ip->i_diskflags; 2013 if (gfsflags & GFS2_DIF_APPENDONLY) 2014 stat->attributes |= STATX_ATTR_APPEND; 2015 if (gfsflags & GFS2_DIF_IMMUTABLE) 2016 stat->attributes |= STATX_ATTR_IMMUTABLE; 2017 2018 stat->attributes_mask |= (STATX_ATTR_APPEND | 2019 STATX_ATTR_COMPRESSED | 2020 STATX_ATTR_ENCRYPTED | 2021 STATX_ATTR_IMMUTABLE | 2022 STATX_ATTR_NODUMP); 2023 2024 generic_fillattr(inode, stat); 2025 2026 if (gfs2_holder_initialized(&gh)) 2027 gfs2_glock_dq_uninit(&gh); 2028 2029 return 0; 2030 } 2031 2032 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 2033 u64 start, u64 len) 2034 { 2035 struct gfs2_inode *ip = GFS2_I(inode); 2036 struct gfs2_holder gh; 2037 int ret; 2038 2039 inode_lock_shared(inode); 2040 2041 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2042 if (ret) 2043 goto out; 2044 2045 ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 2046 2047 gfs2_glock_dq_uninit(&gh); 2048 2049 out: 2050 inode_unlock_shared(inode); 2051 return ret; 2052 } 2053 2054 loff_t gfs2_seek_data(struct file *file, loff_t offset) 2055 { 2056 struct inode *inode = file->f_mapping->host; 2057 struct gfs2_inode *ip = GFS2_I(inode); 2058 struct gfs2_holder gh; 2059 loff_t ret; 2060 2061 inode_lock_shared(inode); 2062 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2063 if (!ret) 2064 ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 2065 gfs2_glock_dq_uninit(&gh); 2066 inode_unlock_shared(inode); 2067 2068 if (ret < 0) 2069 return ret; 2070 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 2071 } 2072 2073 loff_t gfs2_seek_hole(struct file *file, loff_t offset) 2074 { 2075 struct inode *inode = file->f_mapping->host; 2076 struct gfs2_inode *ip = GFS2_I(inode); 2077 struct gfs2_holder gh; 2078 loff_t ret; 2079 2080 inode_lock_shared(inode); 2081 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2082 if (!ret) 2083 ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 2084 gfs2_glock_dq_uninit(&gh); 2085 inode_unlock_shared(inode); 2086 2087 if (ret < 0) 2088 return ret; 2089 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 2090 } 2091 2092 const struct inode_operations gfs2_file_iops = { 2093 .permission = gfs2_permission, 2094 .setattr = gfs2_setattr, 2095 .getattr = gfs2_getattr, 2096 .listxattr = gfs2_listxattr, 2097 .fiemap = gfs2_fiemap, 2098 .get_acl = gfs2_get_acl, 2099 .set_acl = gfs2_set_acl, 2100 }; 2101 2102 const struct inode_operations gfs2_dir_iops = { 2103 .create = gfs2_create, 2104 .lookup = gfs2_lookup, 2105 .link = gfs2_link, 2106 .unlink = gfs2_unlink, 2107 .symlink = gfs2_symlink, 2108 .mkdir = gfs2_mkdir, 2109 .rmdir = gfs2_unlink, 2110 .mknod = gfs2_mknod, 2111 .rename = gfs2_rename2, 2112 .permission = gfs2_permission, 2113 .setattr = gfs2_setattr, 2114 .getattr = gfs2_getattr, 2115 .listxattr = gfs2_listxattr, 2116 .fiemap = gfs2_fiemap, 2117 .get_acl = gfs2_get_acl, 2118 .set_acl = gfs2_set_acl, 2119 .atomic_open = gfs2_atomic_open, 2120 }; 2121 2122 const struct inode_operations gfs2_symlink_iops = { 2123 .get_link = gfs2_get_link, 2124 .permission = gfs2_permission, 2125 .setattr = gfs2_setattr, 2126 .getattr = gfs2_getattr, 2127 .listxattr = gfs2_listxattr, 2128 .fiemap = gfs2_fiemap, 2129 }; 2130 2131