1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 4 * 5 * This copyrighted material is made available to anyone wishing to use, 6 * modify, copy, or redistribute it subject to the terms and conditions 7 * of the GNU General Public License version 2. 8 */ 9 10 #include <linux/slab.h> 11 #include <linux/spinlock.h> 12 #include <linux/completion.h> 13 #include <linux/buffer_head.h> 14 #include <linux/namei.h> 15 #include <linux/mm.h> 16 #include <linux/cred.h> 17 #include <linux/xattr.h> 18 #include <linux/posix_acl.h> 19 #include <linux/gfs2_ondisk.h> 20 #include <linux/crc32.h> 21 #include <linux/fiemap.h> 22 #include <linux/security.h> 23 #include <linux/uaccess.h> 24 25 #include "gfs2.h" 26 #include "incore.h" 27 #include "acl.h" 28 #include "bmap.h" 29 #include "dir.h" 30 #include "xattr.h" 31 #include "glock.h" 32 #include "inode.h" 33 #include "meta_io.h" 34 #include "quota.h" 35 #include "rgrp.h" 36 #include "trans.h" 37 #include "util.h" 38 #include "super.h" 39 #include "glops.h" 40 41 static int iget_test(struct inode *inode, void *opaque) 42 { 43 u64 no_addr = *(u64 *)opaque; 44 45 return GFS2_I(inode)->i_no_addr == no_addr; 46 } 47 48 static int iget_set(struct inode *inode, void *opaque) 49 { 50 u64 no_addr = *(u64 *)opaque; 51 52 GFS2_I(inode)->i_no_addr = no_addr; 53 inode->i_ino = no_addr; 54 return 0; 55 } 56 57 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) 58 { 59 struct inode *inode; 60 61 repeat: 62 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); 63 if (!inode) 64 return inode; 65 if (is_bad_inode(inode)) { 66 iput(inode); 67 goto repeat; 68 } 69 return inode; 70 } 71 72 /** 73 * gfs2_set_iop - Sets inode operations 74 * @inode: The inode with correct i_mode filled in 75 * 76 * GFS2 lookup code fills in vfs inode contents based on info obtained 77 * from directory entry inside gfs2_inode_lookup(). 78 */ 79 80 static void gfs2_set_iop(struct inode *inode) 81 { 82 struct gfs2_sbd *sdp = GFS2_SB(inode); 83 umode_t mode = inode->i_mode; 84 85 if (S_ISREG(mode)) { 86 inode->i_op = &gfs2_file_iops; 87 if (gfs2_localflocks(sdp)) 88 inode->i_fop = &gfs2_file_fops_nolock; 89 else 90 inode->i_fop = &gfs2_file_fops; 91 } else if (S_ISDIR(mode)) { 92 inode->i_op = &gfs2_dir_iops; 93 if (gfs2_localflocks(sdp)) 94 inode->i_fop = &gfs2_dir_fops_nolock; 95 else 96 inode->i_fop = &gfs2_dir_fops; 97 } else if (S_ISLNK(mode)) { 98 inode->i_op = &gfs2_symlink_iops; 99 } else { 100 inode->i_op = &gfs2_file_iops; 101 init_special_inode(inode, inode->i_mode, inode->i_rdev); 102 } 103 } 104 105 /** 106 * gfs2_inode_lookup - Lookup an inode 107 * @sb: The super block 108 * @type: The type of the inode 109 * @no_addr: The inode number 110 * @no_formal_ino: The inode generation number 111 * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; 112 * GFS2_BLKST_FREE do indicate not to verify) 113 * 114 * If @type is DT_UNKNOWN, the inode type is fetched from disk. 115 * 116 * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a 117 * placeholder because it doesn't otherwise make sense), the on-disk block type 118 * is verified to be @blktype. 119 * 120 * Returns: A VFS inode, or an error 121 */ 122 123 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 124 u64 no_addr, u64 no_formal_ino, 125 unsigned int blktype) 126 { 127 struct inode *inode; 128 struct gfs2_inode *ip; 129 struct gfs2_glock *io_gl = NULL; 130 struct gfs2_holder i_gh; 131 int error; 132 133 gfs2_holder_mark_uninitialized(&i_gh); 134 inode = gfs2_iget(sb, no_addr); 135 if (!inode) 136 return ERR_PTR(-ENOMEM); 137 138 ip = GFS2_I(inode); 139 140 if (inode->i_state & I_NEW) { 141 struct gfs2_sbd *sdp = GFS2_SB(inode); 142 ip->i_no_formal_ino = no_formal_ino; 143 144 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 145 if (unlikely(error)) 146 goto fail; 147 flush_delayed_work(&ip->i_gl->gl_work); 148 glock_set_object(ip->i_gl, ip); 149 150 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 151 if (unlikely(error)) 152 goto fail_put; 153 154 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { 155 /* 156 * The GL_SKIP flag indicates to skip reading the inode 157 * block. We read the inode with gfs2_inode_refresh 158 * after possibly checking the block type. 159 */ 160 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 161 GL_SKIP, &i_gh); 162 if (error) 163 goto fail_put; 164 165 if (blktype != GFS2_BLKST_FREE) { 166 error = gfs2_check_blk_type(sdp, no_addr, 167 blktype); 168 if (error) 169 goto fail_put; 170 } 171 } 172 173 set_bit(GIF_INVALID, &ip->i_flags); 174 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 175 if (unlikely(error)) 176 goto fail_put; 177 flush_delayed_work(&ip->i_iopen_gh.gh_gl->gl_work); 178 glock_set_object(ip->i_iopen_gh.gh_gl, ip); 179 gfs2_glock_put(io_gl); 180 io_gl = NULL; 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_refresh; 187 } else { 188 inode->i_mode = DT2IF(type); 189 } 190 191 gfs2_set_iop(inode); 192 193 inode->i_atime.tv_sec = 0; 194 inode->i_atime.tv_nsec = 0; 195 196 unlock_new_inode(inode); 197 } 198 199 if (gfs2_holder_initialized(&i_gh)) 200 gfs2_glock_dq_uninit(&i_gh); 201 return inode; 202 203 fail_refresh: 204 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 205 glock_set_object(ip->i_iopen_gh.gh_gl, NULL); 206 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 207 fail_put: 208 if (io_gl) 209 gfs2_glock_put(io_gl); 210 if (gfs2_holder_initialized(&i_gh)) 211 gfs2_glock_dq_uninit(&i_gh); 212 glock_set_object(ip->i_gl, NULL); 213 fail: 214 iget_failed(inode); 215 return ERR_PTR(error); 216 } 217 218 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 219 u64 *no_formal_ino, unsigned int blktype) 220 { 221 struct super_block *sb = sdp->sd_vfs; 222 struct inode *inode; 223 int error; 224 225 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype); 226 if (IS_ERR(inode)) 227 return inode; 228 229 /* Two extra checks for NFS only */ 230 if (no_formal_ino) { 231 error = -ESTALE; 232 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) 233 goto fail_iput; 234 235 error = -EIO; 236 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 237 goto fail_iput; 238 } 239 return inode; 240 241 fail_iput: 242 iput(inode); 243 return ERR_PTR(error); 244 } 245 246 247 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 248 { 249 struct qstr qstr; 250 struct inode *inode; 251 gfs2_str2qstr(&qstr, name); 252 inode = gfs2_lookupi(dip, &qstr, 1); 253 /* gfs2_lookupi has inconsistent callers: vfs 254 * related routines expect NULL for no entry found, 255 * gfs2_lookup_simple callers expect ENOENT 256 * and do not check for NULL. 257 */ 258 if (inode == NULL) 259 return ERR_PTR(-ENOENT); 260 else 261 return inode; 262 } 263 264 265 /** 266 * gfs2_lookupi - Look up a filename in a directory and return its inode 267 * @d_gh: An initialized holder for the directory glock 268 * @name: The name of the inode to look for 269 * @is_root: If 1, ignore the caller's permissions 270 * @i_gh: An uninitialized holder for the new inode glock 271 * 272 * This can be called via the VFS filldir function when NFS is doing 273 * a readdirplus and the inode which its intending to stat isn't 274 * already in cache. In this case we must not take the directory glock 275 * again, since the readdir call will have already taken that lock. 276 * 277 * Returns: errno 278 */ 279 280 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 281 int is_root) 282 { 283 struct super_block *sb = dir->i_sb; 284 struct gfs2_inode *dip = GFS2_I(dir); 285 struct gfs2_holder d_gh; 286 int error = 0; 287 struct inode *inode = NULL; 288 289 gfs2_holder_mark_uninitialized(&d_gh); 290 if (!name->len || name->len > GFS2_FNAMESIZE) 291 return ERR_PTR(-ENAMETOOLONG); 292 293 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 294 (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 295 dir == d_inode(sb->s_root))) { 296 igrab(dir); 297 return dir; 298 } 299 300 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 301 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 302 if (error) 303 return ERR_PTR(error); 304 } 305 306 if (!is_root) { 307 error = gfs2_permission(dir, MAY_EXEC); 308 if (error) 309 goto out; 310 } 311 312 inode = gfs2_dir_search(dir, name, false); 313 if (IS_ERR(inode)) 314 error = PTR_ERR(inode); 315 out: 316 if (gfs2_holder_initialized(&d_gh)) 317 gfs2_glock_dq_uninit(&d_gh); 318 if (error == -ENOENT) 319 return NULL; 320 return inode ? inode : ERR_PTR(error); 321 } 322 323 /** 324 * create_ok - OK to create a new on-disk inode here? 325 * @dip: Directory in which dinode is to be created 326 * @name: Name of new dinode 327 * @mode: 328 * 329 * Returns: errno 330 */ 331 332 static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 333 umode_t mode) 334 { 335 int error; 336 337 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 338 if (error) 339 return error; 340 341 /* Don't create entries in an unlinked directory */ 342 if (!dip->i_inode.i_nlink) 343 return -ENOENT; 344 345 if (dip->i_entries == (u32)-1) 346 return -EFBIG; 347 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 348 return -EMLINK; 349 350 return 0; 351 } 352 353 static void munge_mode_uid_gid(const struct gfs2_inode *dip, 354 struct inode *inode) 355 { 356 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 357 (dip->i_inode.i_mode & S_ISUID) && 358 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 359 if (S_ISDIR(inode->i_mode)) 360 inode->i_mode |= S_ISUID; 361 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 362 inode->i_mode &= ~07111; 363 inode->i_uid = dip->i_inode.i_uid; 364 } else 365 inode->i_uid = current_fsuid(); 366 367 if (dip->i_inode.i_mode & S_ISGID) { 368 if (S_ISDIR(inode->i_mode)) 369 inode->i_mode |= S_ISGID; 370 inode->i_gid = dip->i_inode.i_gid; 371 } else 372 inode->i_gid = current_fsgid(); 373 } 374 375 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 376 { 377 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 378 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 379 int error; 380 381 error = gfs2_quota_lock_check(ip, &ap); 382 if (error) 383 goto out; 384 385 error = gfs2_inplace_reserve(ip, &ap); 386 if (error) 387 goto out_quota; 388 389 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 390 if (error) 391 goto out_ipreserv; 392 393 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 394 ip->i_no_formal_ino = ip->i_generation; 395 ip->i_inode.i_ino = ip->i_no_addr; 396 ip->i_goal = ip->i_no_addr; 397 398 gfs2_trans_end(sdp); 399 400 out_ipreserv: 401 gfs2_inplace_release(ip); 402 out_quota: 403 gfs2_quota_unlock(ip); 404 out: 405 return error; 406 } 407 408 static void gfs2_init_dir(struct buffer_head *dibh, 409 const struct gfs2_inode *parent) 410 { 411 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 412 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 413 414 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 415 dent->de_inum = di->di_num; /* already GFS2 endian */ 416 dent->de_type = cpu_to_be16(DT_DIR); 417 418 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 419 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 420 gfs2_inum_out(parent, dent); 421 dent->de_type = cpu_to_be16(DT_DIR); 422 423 } 424 425 /** 426 * gfs2_init_xattr - Initialise an xattr block for a new inode 427 * @ip: The inode in question 428 * 429 * This sets up an empty xattr block for a new inode, ready to 430 * take any ACLs, LSM xattrs, etc. 431 */ 432 433 static void gfs2_init_xattr(struct gfs2_inode *ip) 434 { 435 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 436 struct buffer_head *bh; 437 struct gfs2_ea_header *ea; 438 439 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 440 gfs2_trans_add_meta(ip->i_gl, bh); 441 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 442 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 443 444 ea = GFS2_EA_BH2FIRST(bh); 445 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 446 ea->ea_type = GFS2_EATYPE_UNUSED; 447 ea->ea_flags = GFS2_EAFLAG_LAST; 448 449 brelse(bh); 450 } 451 452 /** 453 * init_dinode - Fill in a new dinode structure 454 * @dip: The directory this inode is being created in 455 * @ip: The inode 456 * @symname: The symlink destination (if a symlink) 457 * @bhp: The buffer head (returned to caller) 458 * 459 */ 460 461 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 462 const char *symname) 463 { 464 struct gfs2_dinode *di; 465 struct buffer_head *dibh; 466 467 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 468 gfs2_trans_add_meta(ip->i_gl, dibh); 469 di = (struct gfs2_dinode *)dibh->b_data; 470 gfs2_dinode_out(ip, di); 471 472 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); 473 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); 474 di->__pad1 = 0; 475 di->__pad2 = 0; 476 di->__pad3 = 0; 477 memset(&di->__pad4, 0, sizeof(di->__pad4)); 478 memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 479 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 480 481 switch(ip->i_inode.i_mode & S_IFMT) { 482 case S_IFDIR: 483 gfs2_init_dir(dibh, dip); 484 break; 485 case S_IFLNK: 486 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 487 break; 488 } 489 490 set_buffer_uptodate(dibh); 491 brelse(dibh); 492 } 493 494 /** 495 * gfs2_trans_da_blocks - Calculate number of blocks to link inode 496 * @dip: The directory we are linking into 497 * @da: The dir add information 498 * @nr_inodes: The number of inodes involved 499 * 500 * This calculate the number of blocks we need to reserve in a 501 * transaction to link @nr_inodes into a directory. In most cases 502 * @nr_inodes will be 2 (the directory plus the inode being linked in) 503 * but in case of rename, 4 may be required. 504 * 505 * Returns: Number of blocks 506 */ 507 508 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 509 const struct gfs2_diradd *da, 510 unsigned nr_inodes) 511 { 512 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 513 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 514 } 515 516 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 517 struct gfs2_inode *ip, struct gfs2_diradd *da) 518 { 519 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 520 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 521 int error; 522 523 if (da->nr_blocks) { 524 error = gfs2_quota_lock_check(dip, &ap); 525 if (error) 526 goto fail_quota_locks; 527 528 error = gfs2_inplace_reserve(dip, &ap); 529 if (error) 530 goto fail_quota_locks; 531 532 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 533 if (error) 534 goto fail_ipreserv; 535 } else { 536 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 537 if (error) 538 goto fail_quota_locks; 539 } 540 541 error = gfs2_dir_add(&dip->i_inode, name, ip, da); 542 543 gfs2_trans_end(sdp); 544 fail_ipreserv: 545 gfs2_inplace_release(dip); 546 fail_quota_locks: 547 gfs2_quota_unlock(dip); 548 return error; 549 } 550 551 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 552 void *fs_info) 553 { 554 const struct xattr *xattr; 555 int err = 0; 556 557 for (xattr = xattr_array; xattr->name != NULL; xattr++) { 558 err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 559 xattr->value_len, 0, 560 GFS2_EATYPE_SECURITY); 561 if (err < 0) 562 break; 563 } 564 return err; 565 } 566 567 /** 568 * gfs2_create_inode - Create a new inode 569 * @dir: The parent directory 570 * @dentry: The new dentry 571 * @file: If non-NULL, the file which is being opened 572 * @mode: The permissions on the new inode 573 * @dev: For device nodes, this is the device number 574 * @symname: For symlinks, this is the link destination 575 * @size: The initial size of the inode (ignored for directories) 576 * 577 * Returns: 0 on success, or error code 578 */ 579 580 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 581 struct file *file, 582 umode_t mode, dev_t dev, const char *symname, 583 unsigned int size, int excl, int *opened) 584 { 585 const struct qstr *name = &dentry->d_name; 586 struct posix_acl *default_acl, *acl; 587 struct gfs2_holder ghs[2]; 588 struct inode *inode = NULL; 589 struct gfs2_inode *dip = GFS2_I(dir), *ip; 590 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 591 struct gfs2_glock *io_gl = NULL; 592 int error, free_vfs_inode = 1; 593 u32 aflags = 0; 594 unsigned blocks = 1; 595 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 596 597 if (!name->len || name->len > GFS2_FNAMESIZE) 598 return -ENAMETOOLONG; 599 600 error = gfs2_rsqa_alloc(dip); 601 if (error) 602 return error; 603 604 error = gfs2_rindex_update(sdp); 605 if (error) 606 return error; 607 608 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 609 if (error) 610 goto fail; 611 gfs2_holder_mark_uninitialized(ghs + 1); 612 613 error = create_ok(dip, name, mode); 614 if (error) 615 goto fail_gunlock; 616 617 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 618 error = PTR_ERR(inode); 619 if (!IS_ERR(inode)) { 620 if (S_ISDIR(inode->i_mode)) { 621 iput(inode); 622 inode = ERR_PTR(-EISDIR); 623 goto fail_gunlock; 624 } 625 d_instantiate(dentry, inode); 626 error = 0; 627 if (file) { 628 if (S_ISREG(inode->i_mode)) 629 error = finish_open(file, dentry, gfs2_open_common, opened); 630 else 631 error = finish_no_open(file, NULL); 632 } 633 gfs2_glock_dq_uninit(ghs); 634 return error; 635 } else if (error != -ENOENT) { 636 goto fail_gunlock; 637 } 638 639 error = gfs2_diradd_alloc_required(dir, name, &da); 640 if (error < 0) 641 goto fail_gunlock; 642 643 inode = new_inode(sdp->sd_vfs); 644 error = -ENOMEM; 645 if (!inode) 646 goto fail_gunlock; 647 648 error = posix_acl_create(dir, &mode, &default_acl, &acl); 649 if (error) 650 goto fail_gunlock; 651 652 ip = GFS2_I(inode); 653 error = gfs2_rsqa_alloc(ip); 654 if (error) 655 goto fail_free_acls; 656 657 inode->i_mode = mode; 658 set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 659 inode->i_rdev = dev; 660 inode->i_size = size; 661 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 662 gfs2_set_inode_blocks(inode, 1); 663 munge_mode_uid_gid(dip, inode); 664 check_and_update_goal(dip); 665 ip->i_goal = dip->i_goal; 666 ip->i_diskflags = 0; 667 ip->i_eattr = 0; 668 ip->i_height = 0; 669 ip->i_depth = 0; 670 ip->i_entries = 0; 671 ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 672 673 switch(mode & S_IFMT) { 674 case S_IFREG: 675 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 676 gfs2_tune_get(sdp, gt_new_files_jdata)) 677 ip->i_diskflags |= GFS2_DIF_JDATA; 678 gfs2_set_aops(inode); 679 break; 680 case S_IFDIR: 681 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 682 ip->i_diskflags |= GFS2_DIF_JDATA; 683 ip->i_entries = 2; 684 break; 685 } 686 687 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 688 if (dip->i_diskflags & GFS2_DIF_SYSTEM) 689 ip->i_diskflags |= GFS2_DIF_SYSTEM; 690 691 gfs2_set_inode_flags(inode); 692 693 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 694 (dip->i_diskflags & GFS2_DIF_TOPDIR)) 695 aflags |= GFS2_AF_ORLOV; 696 697 if (default_acl || acl) 698 blocks++; 699 700 error = alloc_dinode(ip, aflags, &blocks); 701 if (error) 702 goto fail_free_inode; 703 704 gfs2_set_inode_blocks(inode, blocks); 705 706 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 707 if (error) 708 goto fail_free_inode; 709 710 glock_set_object(ip->i_gl, ip); 711 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 712 if (error) 713 goto fail_free_inode; 714 715 error = gfs2_trans_begin(sdp, blocks, 0); 716 if (error) 717 goto fail_gunlock2; 718 719 if (blocks > 1) { 720 ip->i_eattr = ip->i_no_addr + 1; 721 gfs2_init_xattr(ip); 722 } 723 init_dinode(dip, ip, symname); 724 gfs2_trans_end(sdp); 725 726 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 727 if (error) 728 goto fail_gunlock2; 729 730 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); 731 732 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 733 if (error) 734 goto fail_gunlock2; 735 736 glock_set_object(ip->i_iopen_gh.gh_gl, ip); 737 gfs2_glock_put(io_gl); 738 gfs2_set_iop(inode); 739 insert_inode_hash(inode); 740 741 free_vfs_inode = 0; /* After this point, the inode is no longer 742 considered free. Any failures need to undo 743 the gfs2 structures. */ 744 if (default_acl) { 745 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 746 posix_acl_release(default_acl); 747 } 748 if (acl) { 749 if (!error) 750 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 751 posix_acl_release(acl); 752 } 753 754 if (error) 755 goto fail_gunlock3; 756 757 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 758 &gfs2_initxattrs, NULL); 759 if (error) 760 goto fail_gunlock3; 761 762 error = link_dinode(dip, name, ip, &da); 763 if (error) 764 goto fail_gunlock3; 765 766 mark_inode_dirty(inode); 767 d_instantiate(dentry, inode); 768 if (file) { 769 *opened |= FILE_CREATED; 770 error = finish_open(file, dentry, gfs2_open_common, opened); 771 } 772 gfs2_glock_dq_uninit(ghs); 773 gfs2_glock_dq_uninit(ghs + 1); 774 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); 775 return error; 776 777 fail_gunlock3: 778 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 779 gfs2_glock_put(io_gl); 780 fail_gunlock2: 781 if (io_gl) 782 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); 783 fail_free_inode: 784 if (ip->i_gl) 785 gfs2_glock_put(ip->i_gl); 786 gfs2_rsqa_delete(ip, NULL); 787 fail_free_acls: 788 if (default_acl) 789 posix_acl_release(default_acl); 790 if (acl) 791 posix_acl_release(acl); 792 fail_gunlock: 793 gfs2_dir_no_add(&da); 794 gfs2_glock_dq_uninit(ghs); 795 if (inode && !IS_ERR(inode)) { 796 clear_nlink(inode); 797 if (!free_vfs_inode) 798 mark_inode_dirty(inode); 799 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, 800 &GFS2_I(inode)->i_flags); 801 iput(inode); 802 } 803 if (gfs2_holder_initialized(ghs + 1)) 804 gfs2_glock_dq_uninit(ghs + 1); 805 fail: 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, NULL); 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 * @opened: atomic_open flags 830 * 831 * 832 * Returns: errno 833 */ 834 835 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 836 struct file *file, int *opened) 837 { 838 struct inode *inode; 839 struct dentry *d; 840 struct gfs2_holder gh; 841 struct gfs2_glock *gl; 842 int error; 843 844 inode = gfs2_lookupi(dir, &dentry->d_name, 0); 845 if (inode == NULL) { 846 d_add(dentry, NULL); 847 return NULL; 848 } 849 if (IS_ERR(inode)) 850 return ERR_CAST(inode); 851 852 gl = GFS2_I(inode)->i_gl; 853 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 854 if (error) { 855 iput(inode); 856 return ERR_PTR(error); 857 } 858 859 d = d_splice_alias(inode, dentry); 860 if (IS_ERR(d)) { 861 gfs2_glock_dq_uninit(&gh); 862 return d; 863 } 864 if (file && S_ISREG(inode->i_mode)) 865 error = finish_open(file, dentry, gfs2_open_common, opened); 866 867 gfs2_glock_dq_uninit(&gh); 868 if (error) { 869 dput(d); 870 return ERR_PTR(error); 871 } 872 return d; 873 } 874 875 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 876 unsigned flags) 877 { 878 return __gfs2_lookup(dir, dentry, NULL, NULL); 879 } 880 881 /** 882 * gfs2_link - Link to a file 883 * @old_dentry: The inode to link 884 * @dir: Add link to this directory 885 * @dentry: The name of the link 886 * 887 * Link the inode in "old_dentry" into the directory "dir" with the 888 * name in "dentry". 889 * 890 * Returns: errno 891 */ 892 893 static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 894 struct dentry *dentry) 895 { 896 struct gfs2_inode *dip = GFS2_I(dir); 897 struct gfs2_sbd *sdp = GFS2_SB(dir); 898 struct inode *inode = d_inode(old_dentry); 899 struct gfs2_inode *ip = GFS2_I(inode); 900 struct gfs2_holder ghs[2]; 901 struct buffer_head *dibh; 902 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 903 int error; 904 905 if (S_ISDIR(inode->i_mode)) 906 return -EPERM; 907 908 error = gfs2_rsqa_alloc(dip); 909 if (error) 910 return error; 911 912 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 913 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 914 915 error = gfs2_glock_nq(ghs); /* parent */ 916 if (error) 917 goto out_parent; 918 919 error = gfs2_glock_nq(ghs + 1); /* child */ 920 if (error) 921 goto out_child; 922 923 error = -ENOENT; 924 if (inode->i_nlink == 0) 925 goto out_gunlock; 926 927 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 928 if (error) 929 goto out_gunlock; 930 931 error = gfs2_dir_check(dir, &dentry->d_name, NULL); 932 switch (error) { 933 case -ENOENT: 934 break; 935 case 0: 936 error = -EEXIST; 937 default: 938 goto out_gunlock; 939 } 940 941 error = -EINVAL; 942 if (!dip->i_inode.i_nlink) 943 goto out_gunlock; 944 error = -EFBIG; 945 if (dip->i_entries == (u32)-1) 946 goto out_gunlock; 947 error = -EPERM; 948 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 949 goto out_gunlock; 950 error = -EINVAL; 951 if (!ip->i_inode.i_nlink) 952 goto out_gunlock; 953 error = -EMLINK; 954 if (ip->i_inode.i_nlink == (u32)-1) 955 goto out_gunlock; 956 957 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 958 if (error < 0) 959 goto out_gunlock; 960 961 if (da.nr_blocks) { 962 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 963 error = gfs2_quota_lock_check(dip, &ap); 964 if (error) 965 goto out_gunlock; 966 967 error = gfs2_inplace_reserve(dip, &ap); 968 if (error) 969 goto out_gunlock_q; 970 971 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 972 if (error) 973 goto out_ipres; 974 } else { 975 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 976 if (error) 977 goto out_ipres; 978 } 979 980 error = gfs2_meta_inode_buffer(ip, &dibh); 981 if (error) 982 goto out_end_trans; 983 984 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 985 if (error) 986 goto out_brelse; 987 988 gfs2_trans_add_meta(ip->i_gl, dibh); 989 inc_nlink(&ip->i_inode); 990 ip->i_inode.i_ctime = current_time(&ip->i_inode); 991 ihold(inode); 992 d_instantiate(dentry, inode); 993 mark_inode_dirty(inode); 994 995 out_brelse: 996 brelse(dibh); 997 out_end_trans: 998 gfs2_trans_end(sdp); 999 out_ipres: 1000 if (da.nr_blocks) 1001 gfs2_inplace_release(dip); 1002 out_gunlock_q: 1003 if (da.nr_blocks) 1004 gfs2_quota_unlock(dip); 1005 out_gunlock: 1006 gfs2_dir_no_add(&da); 1007 gfs2_glock_dq(ghs + 1); 1008 out_child: 1009 gfs2_glock_dq(ghs); 1010 out_parent: 1011 gfs2_holder_uninit(ghs); 1012 gfs2_holder_uninit(ghs + 1); 1013 return error; 1014 } 1015 1016 /* 1017 * gfs2_unlink_ok - check to see that a inode is still in a directory 1018 * @dip: the directory 1019 * @name: the name of the file 1020 * @ip: the inode 1021 * 1022 * Assumes that the lock on (at least) @dip is held. 1023 * 1024 * Returns: 0 if the parent/child relationship is correct, errno if it isn't 1025 */ 1026 1027 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 1028 const struct gfs2_inode *ip) 1029 { 1030 int error; 1031 1032 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 1033 return -EPERM; 1034 1035 if ((dip->i_inode.i_mode & S_ISVTX) && 1036 !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 1037 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 1038 return -EPERM; 1039 1040 if (IS_APPEND(&dip->i_inode)) 1041 return -EPERM; 1042 1043 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 1044 if (error) 1045 return error; 1046 1047 return gfs2_dir_check(&dip->i_inode, name, ip); 1048 } 1049 1050 /** 1051 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 1052 * @dip: The parent directory 1053 * @name: The name of the entry in the parent directory 1054 * @inode: The inode to be removed 1055 * 1056 * Called with all the locks and in a transaction. This will only be 1057 * called for a directory after it has been checked to ensure it is empty. 1058 * 1059 * Returns: 0 on success, or an error 1060 */ 1061 1062 static int gfs2_unlink_inode(struct gfs2_inode *dip, 1063 const struct dentry *dentry) 1064 { 1065 struct inode *inode = d_inode(dentry); 1066 struct gfs2_inode *ip = GFS2_I(inode); 1067 int error; 1068 1069 error = gfs2_dir_del(dip, dentry); 1070 if (error) 1071 return error; 1072 1073 ip->i_entries = 0; 1074 inode->i_ctime = current_time(inode); 1075 if (S_ISDIR(inode->i_mode)) 1076 clear_nlink(inode); 1077 else 1078 drop_nlink(inode); 1079 mark_inode_dirty(inode); 1080 if (inode->i_nlink == 0) 1081 gfs2_unlink_di(inode); 1082 return 0; 1083 } 1084 1085 1086 /** 1087 * gfs2_unlink - Unlink an inode (this does rmdir as well) 1088 * @dir: The inode of the directory containing the inode to unlink 1089 * @dentry: The file itself 1090 * 1091 * This routine uses the type of the inode as a flag to figure out 1092 * whether this is an unlink or an rmdir. 1093 * 1094 * Returns: errno 1095 */ 1096 1097 static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 1098 { 1099 struct gfs2_inode *dip = GFS2_I(dir); 1100 struct gfs2_sbd *sdp = GFS2_SB(dir); 1101 struct inode *inode = d_inode(dentry); 1102 struct gfs2_inode *ip = GFS2_I(inode); 1103 struct gfs2_holder ghs[3]; 1104 struct gfs2_rgrpd *rgd; 1105 int error; 1106 1107 error = gfs2_rindex_update(sdp); 1108 if (error) 1109 return error; 1110 1111 error = -EROFS; 1112 1113 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 1114 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 1115 1116 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1117 if (!rgd) 1118 goto out_inodes; 1119 1120 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 1121 1122 1123 error = gfs2_glock_nq(ghs); /* parent */ 1124 if (error) 1125 goto out_parent; 1126 1127 error = gfs2_glock_nq(ghs + 1); /* child */ 1128 if (error) 1129 goto out_child; 1130 1131 error = -ENOENT; 1132 if (inode->i_nlink == 0) 1133 goto out_rgrp; 1134 1135 if (S_ISDIR(inode->i_mode)) { 1136 error = -ENOTEMPTY; 1137 if (ip->i_entries > 2 || inode->i_nlink > 2) 1138 goto out_rgrp; 1139 } 1140 1141 error = gfs2_glock_nq(ghs + 2); /* rgrp */ 1142 if (error) 1143 goto out_rgrp; 1144 1145 error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 1146 if (error) 1147 goto out_gunlock; 1148 1149 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 1150 if (error) 1151 goto out_end_trans; 1152 1153 error = gfs2_unlink_inode(dip, dentry); 1154 1155 out_end_trans: 1156 gfs2_trans_end(sdp); 1157 out_gunlock: 1158 gfs2_glock_dq(ghs + 2); 1159 out_rgrp: 1160 gfs2_glock_dq(ghs + 1); 1161 out_child: 1162 gfs2_glock_dq(ghs); 1163 out_parent: 1164 gfs2_holder_uninit(ghs + 2); 1165 out_inodes: 1166 gfs2_holder_uninit(ghs + 1); 1167 gfs2_holder_uninit(ghs); 1168 return error; 1169 } 1170 1171 /** 1172 * gfs2_symlink - Create a symlink 1173 * @dir: The directory to create the symlink in 1174 * @dentry: The dentry to put the symlink in 1175 * @symname: The thing which the link points to 1176 * 1177 * Returns: errno 1178 */ 1179 1180 static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 1181 const char *symname) 1182 { 1183 struct gfs2_sbd *sdp = GFS2_SB(dir); 1184 unsigned int size; 1185 1186 size = strlen(symname); 1187 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) 1188 return -ENAMETOOLONG; 1189 1190 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL); 1191 } 1192 1193 /** 1194 * gfs2_mkdir - Make a directory 1195 * @dir: The parent directory of the new one 1196 * @dentry: The dentry of the new directory 1197 * @mode: The mode of the new directory 1198 * 1199 * Returns: errno 1200 */ 1201 1202 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 1203 { 1204 struct gfs2_sbd *sdp = GFS2_SB(dir); 1205 unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); 1206 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL); 1207 } 1208 1209 /** 1210 * gfs2_mknod - Make a special file 1211 * @dir: The directory in which the special file will reside 1212 * @dentry: The dentry of the special file 1213 * @mode: The mode of the special file 1214 * @dev: The device specification of the special file 1215 * 1216 */ 1217 1218 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 1219 dev_t dev) 1220 { 1221 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL); 1222 } 1223 1224 /** 1225 * gfs2_atomic_open - Atomically open a file 1226 * @dir: The directory 1227 * @dentry: The proposed new entry 1228 * @file: The proposed new struct file 1229 * @flags: open flags 1230 * @mode: File mode 1231 * @opened: Flag to say whether the file has been opened or not 1232 * 1233 * Returns: error code or 0 for success 1234 */ 1235 1236 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 1237 struct file *file, unsigned flags, 1238 umode_t mode, int *opened) 1239 { 1240 struct dentry *d; 1241 bool excl = !!(flags & O_EXCL); 1242 1243 if (!d_in_lookup(dentry)) 1244 goto skip_lookup; 1245 1246 d = __gfs2_lookup(dir, dentry, file, opened); 1247 if (IS_ERR(d)) 1248 return PTR_ERR(d); 1249 if (d != NULL) 1250 dentry = d; 1251 if (d_really_is_positive(dentry)) { 1252 if (!(*opened & FILE_OPENED)) 1253 return finish_no_open(file, d); 1254 dput(d); 1255 return 0; 1256 } 1257 1258 BUG_ON(d != NULL); 1259 1260 skip_lookup: 1261 if (!(flags & O_CREAT)) 1262 return -ENOENT; 1263 1264 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened); 1265 } 1266 1267 /* 1268 * gfs2_ok_to_move - check if it's ok to move a directory to another directory 1269 * @this: move this 1270 * @to: to here 1271 * 1272 * Follow @to back to the root and make sure we don't encounter @this 1273 * Assumes we already hold the rename lock. 1274 * 1275 * Returns: errno 1276 */ 1277 1278 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 1279 { 1280 struct inode *dir = &to->i_inode; 1281 struct super_block *sb = dir->i_sb; 1282 struct inode *tmp; 1283 int error = 0; 1284 1285 igrab(dir); 1286 1287 for (;;) { 1288 if (dir == &this->i_inode) { 1289 error = -EINVAL; 1290 break; 1291 } 1292 if (dir == d_inode(sb->s_root)) { 1293 error = 0; 1294 break; 1295 } 1296 1297 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 1298 if (!tmp) { 1299 error = -ENOENT; 1300 break; 1301 } 1302 if (IS_ERR(tmp)) { 1303 error = PTR_ERR(tmp); 1304 break; 1305 } 1306 1307 iput(dir); 1308 dir = tmp; 1309 } 1310 1311 iput(dir); 1312 1313 return error; 1314 } 1315 1316 /** 1317 * update_moved_ino - Update an inode that's being moved 1318 * @ip: The inode being moved 1319 * @ndip: The parent directory of the new filename 1320 * @dir_rename: True of ip is a directory 1321 * 1322 * Returns: errno 1323 */ 1324 1325 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1326 int dir_rename) 1327 { 1328 int error; 1329 struct buffer_head *dibh; 1330 1331 if (dir_rename) 1332 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1333 1334 error = gfs2_meta_inode_buffer(ip, &dibh); 1335 if (error) 1336 return error; 1337 ip->i_inode.i_ctime = current_time(&ip->i_inode); 1338 gfs2_trans_add_meta(ip->i_gl, dibh); 1339 gfs2_dinode_out(ip, dibh->b_data); 1340 brelse(dibh); 1341 return 0; 1342 } 1343 1344 1345 /** 1346 * gfs2_rename - Rename a file 1347 * @odir: Parent directory of old file name 1348 * @odentry: The old dentry of the file 1349 * @ndir: Parent directory of new file name 1350 * @ndentry: The new dentry of the file 1351 * 1352 * Returns: errno 1353 */ 1354 1355 static int gfs2_rename(struct inode *odir, struct dentry *odentry, 1356 struct inode *ndir, struct dentry *ndentry) 1357 { 1358 struct gfs2_inode *odip = GFS2_I(odir); 1359 struct gfs2_inode *ndip = GFS2_I(ndir); 1360 struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 1361 struct gfs2_inode *nip = NULL; 1362 struct gfs2_sbd *sdp = GFS2_SB(odir); 1363 struct gfs2_holder ghs[5], r_gh; 1364 struct gfs2_rgrpd *nrgd; 1365 unsigned int num_gh; 1366 int dir_rename = 0; 1367 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 1368 unsigned int x; 1369 int error; 1370 1371 gfs2_holder_mark_uninitialized(&r_gh); 1372 if (d_really_is_positive(ndentry)) { 1373 nip = GFS2_I(d_inode(ndentry)); 1374 if (ip == nip) 1375 return 0; 1376 } 1377 1378 error = gfs2_rindex_update(sdp); 1379 if (error) 1380 return error; 1381 1382 error = gfs2_rsqa_alloc(ndip); 1383 if (error) 1384 return error; 1385 1386 if (odip != ndip) { 1387 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1388 0, &r_gh); 1389 if (error) 1390 goto out; 1391 1392 if (S_ISDIR(ip->i_inode.i_mode)) { 1393 dir_rename = 1; 1394 /* don't move a directory into its subdir */ 1395 error = gfs2_ok_to_move(ip, ndip); 1396 if (error) 1397 goto out_gunlock_r; 1398 } 1399 } 1400 1401 num_gh = 1; 1402 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 1403 if (odip != ndip) { 1404 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1405 num_gh++; 1406 } 1407 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1408 num_gh++; 1409 1410 if (nip) { 1411 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1412 num_gh++; 1413 /* grab the resource lock for unlink flag twiddling 1414 * this is the case of the target file already existing 1415 * so we unlink before doing the rename 1416 */ 1417 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1418 if (nrgd) 1419 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); 1420 } 1421 1422 for (x = 0; x < num_gh; x++) { 1423 error = gfs2_glock_nq(ghs + x); 1424 if (error) 1425 goto out_gunlock; 1426 } 1427 1428 error = -ENOENT; 1429 if (ip->i_inode.i_nlink == 0) 1430 goto out_gunlock; 1431 1432 /* Check out the old directory */ 1433 1434 error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 1435 if (error) 1436 goto out_gunlock; 1437 1438 /* Check out the new directory */ 1439 1440 if (nip) { 1441 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1442 if (error) 1443 goto out_gunlock; 1444 1445 if (nip->i_inode.i_nlink == 0) { 1446 error = -EAGAIN; 1447 goto out_gunlock; 1448 } 1449 1450 if (S_ISDIR(nip->i_inode.i_mode)) { 1451 if (nip->i_entries < 2) { 1452 gfs2_consist_inode(nip); 1453 error = -EIO; 1454 goto out_gunlock; 1455 } 1456 if (nip->i_entries > 2) { 1457 error = -ENOTEMPTY; 1458 goto out_gunlock; 1459 } 1460 } 1461 } else { 1462 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 1463 if (error) 1464 goto out_gunlock; 1465 1466 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 1467 switch (error) { 1468 case -ENOENT: 1469 error = 0; 1470 break; 1471 case 0: 1472 error = -EEXIST; 1473 default: 1474 goto out_gunlock; 1475 }; 1476 1477 if (odip != ndip) { 1478 if (!ndip->i_inode.i_nlink) { 1479 error = -ENOENT; 1480 goto out_gunlock; 1481 } 1482 if (ndip->i_entries == (u32)-1) { 1483 error = -EFBIG; 1484 goto out_gunlock; 1485 } 1486 if (S_ISDIR(ip->i_inode.i_mode) && 1487 ndip->i_inode.i_nlink == (u32)-1) { 1488 error = -EMLINK; 1489 goto out_gunlock; 1490 } 1491 } 1492 } 1493 1494 /* Check out the dir to be renamed */ 1495 1496 if (dir_rename) { 1497 error = gfs2_permission(d_inode(odentry), MAY_WRITE); 1498 if (error) 1499 goto out_gunlock; 1500 } 1501 1502 if (nip == NULL) { 1503 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 1504 if (error) 1505 goto out_gunlock; 1506 } 1507 1508 if (da.nr_blocks) { 1509 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1510 error = gfs2_quota_lock_check(ndip, &ap); 1511 if (error) 1512 goto out_gunlock; 1513 1514 error = gfs2_inplace_reserve(ndip, &ap); 1515 if (error) 1516 goto out_gunlock_q; 1517 1518 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1519 4 * RES_LEAF + 4, 0); 1520 if (error) 1521 goto out_ipreserv; 1522 } else { 1523 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 1524 5 * RES_LEAF + 4, 0); 1525 if (error) 1526 goto out_gunlock; 1527 } 1528 1529 /* Remove the target file, if it exists */ 1530 1531 if (nip) 1532 error = gfs2_unlink_inode(ndip, ndentry); 1533 1534 error = update_moved_ino(ip, ndip, dir_rename); 1535 if (error) 1536 goto out_end_trans; 1537 1538 error = gfs2_dir_del(odip, odentry); 1539 if (error) 1540 goto out_end_trans; 1541 1542 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 1543 if (error) 1544 goto out_end_trans; 1545 1546 out_end_trans: 1547 gfs2_trans_end(sdp); 1548 out_ipreserv: 1549 if (da.nr_blocks) 1550 gfs2_inplace_release(ndip); 1551 out_gunlock_q: 1552 if (da.nr_blocks) 1553 gfs2_quota_unlock(ndip); 1554 out_gunlock: 1555 gfs2_dir_no_add(&da); 1556 while (x--) { 1557 gfs2_glock_dq(ghs + x); 1558 gfs2_holder_uninit(ghs + x); 1559 } 1560 out_gunlock_r: 1561 if (gfs2_holder_initialized(&r_gh)) 1562 gfs2_glock_dq_uninit(&r_gh); 1563 out: 1564 return error; 1565 } 1566 1567 /** 1568 * gfs2_exchange - exchange two files 1569 * @odir: Parent directory of old file name 1570 * @odentry: The old dentry of the file 1571 * @ndir: Parent directory of new file name 1572 * @ndentry: The new dentry of the file 1573 * @flags: The rename flags 1574 * 1575 * Returns: errno 1576 */ 1577 1578 static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1579 struct inode *ndir, struct dentry *ndentry, 1580 unsigned int flags) 1581 { 1582 struct gfs2_inode *odip = GFS2_I(odir); 1583 struct gfs2_inode *ndip = GFS2_I(ndir); 1584 struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1585 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1586 struct gfs2_sbd *sdp = GFS2_SB(odir); 1587 struct gfs2_holder ghs[5], r_gh; 1588 unsigned int num_gh; 1589 unsigned int x; 1590 umode_t old_mode = oip->i_inode.i_mode; 1591 umode_t new_mode = nip->i_inode.i_mode; 1592 int error; 1593 1594 gfs2_holder_mark_uninitialized(&r_gh); 1595 error = gfs2_rindex_update(sdp); 1596 if (error) 1597 return error; 1598 1599 if (odip != ndip) { 1600 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1601 0, &r_gh); 1602 if (error) 1603 goto out; 1604 1605 if (S_ISDIR(old_mode)) { 1606 /* don't move a directory into its subdir */ 1607 error = gfs2_ok_to_move(oip, ndip); 1608 if (error) 1609 goto out_gunlock_r; 1610 } 1611 1612 if (S_ISDIR(new_mode)) { 1613 /* don't move a directory into its subdir */ 1614 error = gfs2_ok_to_move(nip, odip); 1615 if (error) 1616 goto out_gunlock_r; 1617 } 1618 } 1619 1620 num_gh = 1; 1621 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 1622 if (odip != ndip) { 1623 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1624 num_gh++; 1625 } 1626 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1627 num_gh++; 1628 1629 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 1630 num_gh++; 1631 1632 for (x = 0; x < num_gh; x++) { 1633 error = gfs2_glock_nq(ghs + x); 1634 if (error) 1635 goto out_gunlock; 1636 } 1637 1638 error = -ENOENT; 1639 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1640 goto out_gunlock; 1641 1642 error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1643 if (error) 1644 goto out_gunlock; 1645 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1646 if (error) 1647 goto out_gunlock; 1648 1649 if (S_ISDIR(old_mode)) { 1650 error = gfs2_permission(odentry->d_inode, MAY_WRITE); 1651 if (error) 1652 goto out_gunlock; 1653 } 1654 if (S_ISDIR(new_mode)) { 1655 error = gfs2_permission(ndentry->d_inode, MAY_WRITE); 1656 if (error) 1657 goto out_gunlock; 1658 } 1659 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1660 if (error) 1661 goto out_gunlock; 1662 1663 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1664 if (error) 1665 goto out_end_trans; 1666 1667 error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1668 if (error) 1669 goto out_end_trans; 1670 1671 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1672 IF2DT(old_mode)); 1673 if (error) 1674 goto out_end_trans; 1675 1676 error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1677 IF2DT(new_mode)); 1678 if (error) 1679 goto out_end_trans; 1680 1681 if (odip != ndip) { 1682 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1683 inc_nlink(&odip->i_inode); 1684 drop_nlink(&ndip->i_inode); 1685 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1686 inc_nlink(&ndip->i_inode); 1687 drop_nlink(&odip->i_inode); 1688 } 1689 } 1690 mark_inode_dirty(&ndip->i_inode); 1691 if (odip != ndip) 1692 mark_inode_dirty(&odip->i_inode); 1693 1694 out_end_trans: 1695 gfs2_trans_end(sdp); 1696 out_gunlock: 1697 while (x--) { 1698 gfs2_glock_dq(ghs + x); 1699 gfs2_holder_uninit(ghs + x); 1700 } 1701 out_gunlock_r: 1702 if (gfs2_holder_initialized(&r_gh)) 1703 gfs2_glock_dq_uninit(&r_gh); 1704 out: 1705 return error; 1706 } 1707 1708 static int gfs2_rename2(struct inode *odir, struct dentry *odentry, 1709 struct inode *ndir, struct dentry *ndentry, 1710 unsigned int flags) 1711 { 1712 flags &= ~RENAME_NOREPLACE; 1713 1714 if (flags & ~RENAME_EXCHANGE) 1715 return -EINVAL; 1716 1717 if (flags & RENAME_EXCHANGE) 1718 return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1719 1720 return gfs2_rename(odir, odentry, ndir, ndentry); 1721 } 1722 1723 /** 1724 * gfs2_get_link - Follow a symbolic link 1725 * @dentry: The dentry of the link 1726 * @inode: The inode of the link 1727 * @done: destructor for return value 1728 * 1729 * This can handle symlinks of any size. 1730 * 1731 * Returns: 0 on success or error code 1732 */ 1733 1734 static const char *gfs2_get_link(struct dentry *dentry, 1735 struct inode *inode, 1736 struct delayed_call *done) 1737 { 1738 struct gfs2_inode *ip = GFS2_I(inode); 1739 struct gfs2_holder i_gh; 1740 struct buffer_head *dibh; 1741 unsigned int size; 1742 char *buf; 1743 int error; 1744 1745 if (!dentry) 1746 return ERR_PTR(-ECHILD); 1747 1748 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 1749 error = gfs2_glock_nq(&i_gh); 1750 if (error) { 1751 gfs2_holder_uninit(&i_gh); 1752 return ERR_PTR(error); 1753 } 1754 1755 size = (unsigned int)i_size_read(&ip->i_inode); 1756 if (size == 0) { 1757 gfs2_consist_inode(ip); 1758 buf = ERR_PTR(-EIO); 1759 goto out; 1760 } 1761 1762 error = gfs2_meta_inode_buffer(ip, &dibh); 1763 if (error) { 1764 buf = ERR_PTR(error); 1765 goto out; 1766 } 1767 1768 buf = kzalloc(size + 1, GFP_NOFS); 1769 if (!buf) 1770 buf = ERR_PTR(-ENOMEM); 1771 else 1772 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 1773 brelse(dibh); 1774 out: 1775 gfs2_glock_dq_uninit(&i_gh); 1776 if (!IS_ERR(buf)) 1777 set_delayed_call(done, kfree_link, buf); 1778 return buf; 1779 } 1780 1781 /** 1782 * gfs2_permission - 1783 * @inode: The inode 1784 * @mask: The mask to be tested 1785 * @flags: Indicates whether this is an RCU path walk or not 1786 * 1787 * This may be called from the VFS directly, or from within GFS2 with the 1788 * inode locked, so we look to see if the glock is already locked and only 1789 * lock the glock if its not already been done. 1790 * 1791 * Returns: errno 1792 */ 1793 1794 int gfs2_permission(struct inode *inode, int mask) 1795 { 1796 struct gfs2_inode *ip; 1797 struct gfs2_holder i_gh; 1798 int error; 1799 1800 gfs2_holder_mark_uninitialized(&i_gh); 1801 ip = GFS2_I(inode); 1802 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 1803 if (mask & MAY_NOT_BLOCK) 1804 return -ECHILD; 1805 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 1806 if (error) 1807 return error; 1808 } 1809 1810 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1811 error = -EPERM; 1812 else 1813 error = generic_permission(inode, mask); 1814 if (gfs2_holder_initialized(&i_gh)) 1815 gfs2_glock_dq_uninit(&i_gh); 1816 1817 return error; 1818 } 1819 1820 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 1821 { 1822 setattr_copy(inode, attr); 1823 mark_inode_dirty(inode); 1824 return 0; 1825 } 1826 1827 /** 1828 * gfs2_setattr_simple - 1829 * @ip: 1830 * @attr: 1831 * 1832 * Returns: errno 1833 */ 1834 1835 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 1836 { 1837 int error; 1838 1839 if (current->journal_info) 1840 return __gfs2_setattr_simple(inode, attr); 1841 1842 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 1843 if (error) 1844 return error; 1845 1846 error = __gfs2_setattr_simple(inode, attr); 1847 gfs2_trans_end(GFS2_SB(inode)); 1848 return error; 1849 } 1850 1851 static int setattr_chown(struct inode *inode, struct iattr *attr) 1852 { 1853 struct gfs2_inode *ip = GFS2_I(inode); 1854 struct gfs2_sbd *sdp = GFS2_SB(inode); 1855 kuid_t ouid, nuid; 1856 kgid_t ogid, ngid; 1857 int error; 1858 struct gfs2_alloc_parms ap; 1859 1860 ouid = inode->i_uid; 1861 ogid = inode->i_gid; 1862 nuid = attr->ia_uid; 1863 ngid = attr->ia_gid; 1864 1865 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1866 ouid = nuid = NO_UID_QUOTA_CHANGE; 1867 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1868 ogid = ngid = NO_GID_QUOTA_CHANGE; 1869 1870 error = gfs2_rsqa_alloc(ip); 1871 if (error) 1872 goto out; 1873 1874 error = gfs2_rindex_update(sdp); 1875 if (error) 1876 goto out; 1877 1878 error = gfs2_quota_lock(ip, nuid, ngid); 1879 if (error) 1880 goto out; 1881 1882 ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1883 1884 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 1885 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1886 error = gfs2_quota_check(ip, nuid, ngid, &ap); 1887 if (error) 1888 goto out_gunlock_q; 1889 } 1890 1891 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 1892 if (error) 1893 goto out_gunlock_q; 1894 1895 error = gfs2_setattr_simple(inode, attr); 1896 if (error) 1897 goto out_end_trans; 1898 1899 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 1900 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1901 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1902 gfs2_quota_change(ip, ap.target, nuid, ngid); 1903 } 1904 1905 out_end_trans: 1906 gfs2_trans_end(sdp); 1907 out_gunlock_q: 1908 gfs2_quota_unlock(ip); 1909 out: 1910 return error; 1911 } 1912 1913 /** 1914 * gfs2_setattr - Change attributes on an inode 1915 * @dentry: The dentry which is changing 1916 * @attr: The structure describing the change 1917 * 1918 * The VFS layer wants to change one or more of an inodes attributes. Write 1919 * that change out to disk. 1920 * 1921 * Returns: errno 1922 */ 1923 1924 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 1925 { 1926 struct inode *inode = d_inode(dentry); 1927 struct gfs2_inode *ip = GFS2_I(inode); 1928 struct gfs2_holder i_gh; 1929 int error; 1930 1931 error = gfs2_rsqa_alloc(ip); 1932 if (error) 1933 return error; 1934 1935 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 1936 if (error) 1937 return error; 1938 1939 error = -EPERM; 1940 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 1941 goto out; 1942 1943 error = setattr_prepare(dentry, attr); 1944 if (error) 1945 goto out; 1946 1947 if (attr->ia_valid & ATTR_SIZE) 1948 error = gfs2_setattr_size(inode, attr->ia_size); 1949 else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 1950 error = setattr_chown(inode, attr); 1951 else { 1952 error = gfs2_setattr_simple(inode, attr); 1953 if (!error && attr->ia_valid & ATTR_MODE) 1954 error = posix_acl_chmod(inode, inode->i_mode); 1955 } 1956 1957 out: 1958 if (!error) 1959 mark_inode_dirty(inode); 1960 gfs2_glock_dq_uninit(&i_gh); 1961 return error; 1962 } 1963 1964 /** 1965 * gfs2_getattr - Read out an inode's attributes 1966 * @path: Object to query 1967 * @stat: The inode's stats 1968 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1969 * @flags: AT_STATX_xxx setting 1970 * 1971 * This may be called from the VFS directly, or from within GFS2 with the 1972 * inode locked, so we look to see if the glock is already locked and only 1973 * lock the glock if its not already been done. Note that its the NFS 1974 * readdirplus operation which causes this to be called (from filldir) 1975 * with the glock already held. 1976 * 1977 * Returns: errno 1978 */ 1979 1980 static int gfs2_getattr(const struct path *path, struct kstat *stat, 1981 u32 request_mask, unsigned int flags) 1982 { 1983 struct inode *inode = d_inode(path->dentry); 1984 struct gfs2_inode *ip = GFS2_I(inode); 1985 struct gfs2_holder gh; 1986 int error; 1987 1988 gfs2_holder_mark_uninitialized(&gh); 1989 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 1990 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 1991 if (error) 1992 return error; 1993 } 1994 1995 generic_fillattr(inode, stat); 1996 if (gfs2_holder_initialized(&gh)) 1997 gfs2_glock_dq_uninit(&gh); 1998 1999 return 0; 2000 } 2001 2002 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 2003 u64 start, u64 len) 2004 { 2005 struct gfs2_inode *ip = GFS2_I(inode); 2006 struct gfs2_holder gh; 2007 int ret; 2008 2009 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); 2010 if (ret) 2011 return ret; 2012 2013 inode_lock(inode); 2014 2015 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 2016 if (ret) 2017 goto out; 2018 2019 if (gfs2_is_stuffed(ip)) { 2020 u64 phys = ip->i_no_addr << inode->i_blkbits; 2021 u64 size = i_size_read(inode); 2022 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| 2023 FIEMAP_EXTENT_DATA_INLINE; 2024 phys += sizeof(struct gfs2_dinode); 2025 phys += start; 2026 if (start + len > size) 2027 len = size - start; 2028 if (start < size) 2029 ret = fiemap_fill_next_extent(fieinfo, start, phys, 2030 len, flags); 2031 if (ret == 1) 2032 ret = 0; 2033 } else { 2034 ret = __generic_block_fiemap(inode, fieinfo, start, len, 2035 gfs2_block_map); 2036 } 2037 2038 gfs2_glock_dq_uninit(&gh); 2039 out: 2040 inode_unlock(inode); 2041 return ret; 2042 } 2043 2044 const struct inode_operations gfs2_file_iops = { 2045 .permission = gfs2_permission, 2046 .setattr = gfs2_setattr, 2047 .getattr = gfs2_getattr, 2048 .listxattr = gfs2_listxattr, 2049 .fiemap = gfs2_fiemap, 2050 .get_acl = gfs2_get_acl, 2051 .set_acl = gfs2_set_acl, 2052 }; 2053 2054 const struct inode_operations gfs2_dir_iops = { 2055 .create = gfs2_create, 2056 .lookup = gfs2_lookup, 2057 .link = gfs2_link, 2058 .unlink = gfs2_unlink, 2059 .symlink = gfs2_symlink, 2060 .mkdir = gfs2_mkdir, 2061 .rmdir = gfs2_unlink, 2062 .mknod = gfs2_mknod, 2063 .rename = gfs2_rename2, 2064 .permission = gfs2_permission, 2065 .setattr = gfs2_setattr, 2066 .getattr = gfs2_getattr, 2067 .listxattr = gfs2_listxattr, 2068 .fiemap = gfs2_fiemap, 2069 .get_acl = gfs2_get_acl, 2070 .set_acl = gfs2_set_acl, 2071 .atomic_open = gfs2_atomic_open, 2072 }; 2073 2074 const struct inode_operations gfs2_symlink_iops = { 2075 .get_link = gfs2_get_link, 2076 .permission = gfs2_permission, 2077 .setattr = gfs2_setattr, 2078 .getattr = gfs2_getattr, 2079 .listxattr = gfs2_listxattr, 2080 .fiemap = gfs2_fiemap, 2081 }; 2082 2083