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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[linux-2.6/btrfs-unstable.git] / fs / gfs2 / inode.c
blob648f0ca1ad57e7893631d8c51f771aa47194fc7c
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/iomap.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 to 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
149 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
150 if (unlikely(error))
151 goto fail_put;
152
153 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
154 /*
155 * The GL_SKIP flag indicates to skip reading the inode
156 * block. We read the inode with gfs2_inode_refresh
157 * after possibly checking the block type.
158 */
159 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
160 GL_SKIP, &i_gh);
161 if (error)
162 goto fail_put;
163
164 if (blktype != GFS2_BLKST_FREE) {
165 error = gfs2_check_blk_type(sdp, no_addr,
166 blktype);
167 if (error)
168 goto fail_put;
169 }
170 }
171
172 glock_set_object(ip->i_gl, ip);
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 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
178 gfs2_glock_put(io_gl);
179 io_gl = NULL;
180
181 if (type == DT_UNKNOWN) {
182 /* Inode glock must be locked already */
183 error = gfs2_inode_refresh(GFS2_I(inode));
184 if (error)
185 goto fail_refresh;
186 } else {
187 inode->i_mode = DT2IF(type);
188 }
189
190 gfs2_set_iop(inode);
191
192 /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
193 inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1);
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_clear_object(ip->i_iopen_gh.gh_gl, ip);
206 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
207 fail_put:
208 if (io_gl)
209 gfs2_glock_put(io_gl);
210 glock_clear_object(ip->i_gl, ip);
211 if (gfs2_holder_initialized(&i_gh))
212 gfs2_glock_dq_uninit(&i_gh);
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)
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);
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 flush_delayed_work(&ip->i_gl->gl_work);
710 glock_set_object(ip->i_gl, ip);
711
712 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
713 if (error)
714 goto fail_free_inode;
715
716 error = gfs2_trans_begin(sdp, blocks, 0);
717 if (error)
718 goto fail_gunlock2;
719
720 if (blocks > 1) {
721 ip->i_eattr = ip->i_no_addr + 1;
722 gfs2_init_xattr(ip);
723 }
724 init_dinode(dip, ip, symname);
725 gfs2_trans_end(sdp);
726
727 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
728 if (error)
729 goto fail_gunlock2;
730
731 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
732
733 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
734 if (error)
735 goto fail_gunlock2;
736
737 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
738 gfs2_glock_put(io_gl);
739 gfs2_set_iop(inode);
740 insert_inode_hash(inode);
741
742 free_vfs_inode = 0; /* After this point, the inode is no longer
743 considered free. Any failures need to undo
744 the gfs2 structures. */
745 if (default_acl) {
746 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
747 posix_acl_release(default_acl);
748 }
749 if (acl) {
750 if (!error)
751 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
752 posix_acl_release(acl);
753 }
754
755 if (error)
756 goto fail_gunlock3;
757
758 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
759 &gfs2_initxattrs, NULL);
760 if (error)
761 goto fail_gunlock3;
762
763 error = link_dinode(dip, name, ip, &da);
764 if (error)
765 goto fail_gunlock3;
766
767 mark_inode_dirty(inode);
768 d_instantiate(dentry, inode);
769 if (file) {
770 file->f_mode |= FMODE_CREATED;
771 error = finish_open(file, dentry, gfs2_open_common);
772 }
773 gfs2_glock_dq_uninit(ghs);
774 gfs2_glock_dq_uninit(ghs + 1);
775 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
776 return error;
777
778 fail_gunlock3:
779 glock_clear_object(io_gl, ip);
780 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
781 gfs2_glock_put(io_gl);
782 fail_gunlock2:
783 if (io_gl)
784 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
785 fail_free_inode:
786 if (ip->i_gl) {
787 glock_clear_object(ip->i_gl, ip);
788 gfs2_glock_put(ip->i_gl);
789 }
790 gfs2_rsqa_delete(ip, NULL);
791 fail_free_acls:
792 if (default_acl)
793 posix_acl_release(default_acl);
794 if (acl)
795 posix_acl_release(acl);
796 fail_gunlock:
797 gfs2_dir_no_add(&da);
798 gfs2_glock_dq_uninit(ghs);
799 if (inode && !IS_ERR(inode)) {
800 clear_nlink(inode);
801 if (!free_vfs_inode)
802 mark_inode_dirty(inode);
803 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
804 &GFS2_I(inode)->i_flags);
805 iput(inode);
806 }
807 if (gfs2_holder_initialized(ghs + 1))
808 gfs2_glock_dq_uninit(ghs + 1);
809 fail:
810 return error;
811 }
812
813 /**
814 * gfs2_create - Create a file
815 * @dir: The directory in which to create the file
816 * @dentry: The dentry of the new file
817 * @mode: The mode of the new file
818 *
819 * Returns: errno
820 */
821
822 static int gfs2_create(struct inode *dir, struct dentry *dentry,
823 umode_t mode, bool excl)
824 {
825 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl);
826 }
827
828 /**
829 * __gfs2_lookup - Look up a filename in a directory and return its inode
830 * @dir: The directory inode
831 * @dentry: The dentry of the new inode
832 * @file: File to be opened
833 *
834 *
835 * Returns: errno
836 */
837
838 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
839 struct file *file)
840 {
841 struct inode *inode;
842 struct dentry *d;
843 struct gfs2_holder gh;
844 struct gfs2_glock *gl;
845 int error;
846
847 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
848 if (inode == NULL) {
849 d_add(dentry, NULL);
850 return NULL;
851 }
852 if (IS_ERR(inode))
853 return ERR_CAST(inode);
854
855 gl = GFS2_I(inode)->i_gl;
856 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
857 if (error) {
858 iput(inode);
859 return ERR_PTR(error);
860 }
861
862 d = d_splice_alias(inode, dentry);
863 if (IS_ERR(d)) {
864 gfs2_glock_dq_uninit(&gh);
865 return d;
866 }
867 if (file && S_ISREG(inode->i_mode))
868 error = finish_open(file, dentry, gfs2_open_common);
869
870 gfs2_glock_dq_uninit(&gh);
871 if (error) {
872 dput(d);
873 return ERR_PTR(error);
874 }
875 return d;
876 }
877
878 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
879 unsigned flags)
880 {
881 return __gfs2_lookup(dir, dentry, NULL);
882 }
883
884 /**
885 * gfs2_link - Link to a file
886 * @old_dentry: The inode to link
887 * @dir: Add link to this directory
888 * @dentry: The name of the link
889 *
890 * Link the inode in "old_dentry" into the directory "dir" with the
891 * name in "dentry".
892 *
893 * Returns: errno
894 */
895
896 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
897 struct dentry *dentry)
898 {
899 struct gfs2_inode *dip = GFS2_I(dir);
900 struct gfs2_sbd *sdp = GFS2_SB(dir);
901 struct inode *inode = d_inode(old_dentry);
902 struct gfs2_inode *ip = GFS2_I(inode);
903 struct gfs2_holder ghs[2];
904 struct buffer_head *dibh;
905 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
906 int error;
907
908 if (S_ISDIR(inode->i_mode))
909 return -EPERM;
910
911 error = gfs2_rsqa_alloc(dip);
912 if (error)
913 return error;
914
915 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
916 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
917
918 error = gfs2_glock_nq(ghs); /* parent */
919 if (error)
920 goto out_parent;
921
922 error = gfs2_glock_nq(ghs + 1); /* child */
923 if (error)
924 goto out_child;
925
926 error = -ENOENT;
927 if (inode->i_nlink == 0)
928 goto out_gunlock;
929
930 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
931 if (error)
932 goto out_gunlock;
933
934 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
935 switch (error) {
936 case -ENOENT:
937 break;
938 case 0:
939 error = -EEXIST;
940 default:
941 goto out_gunlock;
942 }
943
944 error = -EINVAL;
945 if (!dip->i_inode.i_nlink)
946 goto out_gunlock;
947 error = -EFBIG;
948 if (dip->i_entries == (u32)-1)
949 goto out_gunlock;
950 error = -EPERM;
951 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
952 goto out_gunlock;
953 error = -EINVAL;
954 if (!ip->i_inode.i_nlink)
955 goto out_gunlock;
956 error = -EMLINK;
957 if (ip->i_inode.i_nlink == (u32)-1)
958 goto out_gunlock;
959
960 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
961 if (error < 0)
962 goto out_gunlock;
963
964 if (da.nr_blocks) {
965 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
966 error = gfs2_quota_lock_check(dip, &ap);
967 if (error)
968 goto out_gunlock;
969
970 error = gfs2_inplace_reserve(dip, &ap);
971 if (error)
972 goto out_gunlock_q;
973
974 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
975 if (error)
976 goto out_ipres;
977 } else {
978 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
979 if (error)
980 goto out_ipres;
981 }
982
983 error = gfs2_meta_inode_buffer(ip, &dibh);
984 if (error)
985 goto out_end_trans;
986
987 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
988 if (error)
989 goto out_brelse;
990
991 gfs2_trans_add_meta(ip->i_gl, dibh);
992 inc_nlink(&ip->i_inode);
993 ip->i_inode.i_ctime = current_time(&ip->i_inode);
994 ihold(inode);
995 d_instantiate(dentry, inode);
996 mark_inode_dirty(inode);
997
998 out_brelse:
999 brelse(dibh);
1000 out_end_trans:
1001 gfs2_trans_end(sdp);
1002 out_ipres:
1003 if (da.nr_blocks)
1004 gfs2_inplace_release(dip);
1005 out_gunlock_q:
1006 if (da.nr_blocks)
1007 gfs2_quota_unlock(dip);
1008 out_gunlock:
1009 gfs2_dir_no_add(&da);
1010 gfs2_glock_dq(ghs + 1);
1011 out_child:
1012 gfs2_glock_dq(ghs);
1013 out_parent:
1014 gfs2_holder_uninit(ghs);
1015 gfs2_holder_uninit(ghs + 1);
1016 return error;
1017 }
1018
1019 /*
1020 * gfs2_unlink_ok - check to see that a inode is still in a directory
1021 * @dip: the directory
1022 * @name: the name of the file
1023 * @ip: the inode
1024 *
1025 * Assumes that the lock on (at least) @dip is held.
1026 *
1027 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1028 */
1029
1030 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1031 const struct gfs2_inode *ip)
1032 {
1033 int error;
1034
1035 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1036 return -EPERM;
1037
1038 if ((dip->i_inode.i_mode & S_ISVTX) &&
1039 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1040 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
1041 return -EPERM;
1042
1043 if (IS_APPEND(&dip->i_inode))
1044 return -EPERM;
1045
1046 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
1047 if (error)
1048 return error;
1049
1050 return gfs2_dir_check(&dip->i_inode, name, ip);
1051 }
1052
1053 /**
1054 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1055 * @dip: The parent directory
1056 * @name: The name of the entry in the parent directory
1057 * @inode: The inode to be removed
1058 *
1059 * Called with all the locks and in a transaction. This will only be
1060 * called for a directory after it has been checked to ensure it is empty.
1061 *
1062 * Returns: 0 on success, or an error
1063 */
1064
1065 static int gfs2_unlink_inode(struct gfs2_inode *dip,
1066 const struct dentry *dentry)
1067 {
1068 struct inode *inode = d_inode(dentry);
1069 struct gfs2_inode *ip = GFS2_I(inode);
1070 int error;
1071
1072 error = gfs2_dir_del(dip, dentry);
1073 if (error)
1074 return error;
1075
1076 ip->i_entries = 0;
1077 inode->i_ctime = current_time(inode);
1078 if (S_ISDIR(inode->i_mode))
1079 clear_nlink(inode);
1080 else
1081 drop_nlink(inode);
1082 mark_inode_dirty(inode);
1083 if (inode->i_nlink == 0)
1084 gfs2_unlink_di(inode);
1085 return 0;
1086 }
1087
1088
1089 /**
1090 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1091 * @dir: The inode of the directory containing the inode to unlink
1092 * @dentry: The file itself
1093 *
1094 * This routine uses the type of the inode as a flag to figure out
1095 * whether this is an unlink or an rmdir.
1096 *
1097 * Returns: errno
1098 */
1099
1100 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1101 {
1102 struct gfs2_inode *dip = GFS2_I(dir);
1103 struct gfs2_sbd *sdp = GFS2_SB(dir);
1104 struct inode *inode = d_inode(dentry);
1105 struct gfs2_inode *ip = GFS2_I(inode);
1106 struct gfs2_holder ghs[3];
1107 struct gfs2_rgrpd *rgd;
1108 int error;
1109
1110 error = gfs2_rindex_update(sdp);
1111 if (error)
1112 return error;
1113
1114 error = -EROFS;
1115
1116 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1117 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1118
1119 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1120 if (!rgd)
1121 goto out_inodes;
1122
1123 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1124
1125
1126 error = gfs2_glock_nq(ghs); /* parent */
1127 if (error)
1128 goto out_parent;
1129
1130 error = gfs2_glock_nq(ghs + 1); /* child */
1131 if (error)
1132 goto out_child;
1133
1134 error = -ENOENT;
1135 if (inode->i_nlink == 0)
1136 goto out_rgrp;
1137
1138 if (S_ISDIR(inode->i_mode)) {
1139 error = -ENOTEMPTY;
1140 if (ip->i_entries > 2 || inode->i_nlink > 2)
1141 goto out_rgrp;
1142 }
1143
1144 error = gfs2_glock_nq(ghs + 2); /* rgrp */
1145 if (error)
1146 goto out_rgrp;
1147
1148 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1149 if (error)
1150 goto out_gunlock;
1151
1152 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1153 if (error)
1154 goto out_gunlock;
1155
1156 error = gfs2_unlink_inode(dip, dentry);
1157 gfs2_trans_end(sdp);
1158
1159 out_gunlock:
1160 gfs2_glock_dq(ghs + 2);
1161 out_rgrp:
1162 gfs2_glock_dq(ghs + 1);
1163 out_child:
1164 gfs2_glock_dq(ghs);
1165 out_parent:
1166 gfs2_holder_uninit(ghs + 2);
1167 out_inodes:
1168 gfs2_holder_uninit(ghs + 1);
1169 gfs2_holder_uninit(ghs);
1170 return error;
1171 }
1172
1173 /**
1174 * gfs2_symlink - Create a symlink
1175 * @dir: The directory to create the symlink in
1176 * @dentry: The dentry to put the symlink in
1177 * @symname: The thing which the link points to
1178 *
1179 * Returns: errno
1180 */
1181
1182 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1183 const char *symname)
1184 {
1185 unsigned int size;
1186
1187 size = strlen(symname);
1188 if (size >= gfs2_max_stuffed_size(GFS2_I(dir)))
1189 return -ENAMETOOLONG;
1190
1191 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0);
1192 }
1193
1194 /**
1195 * gfs2_mkdir - Make a directory
1196 * @dir: The parent directory of the new one
1197 * @dentry: The dentry of the new directory
1198 * @mode: The mode of the new directory
1199 *
1200 * Returns: errno
1201 */
1202
1203 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1204 {
1205 unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir));
1206 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0);
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);
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 *
1232 * Returns: error code or 0 for success
1233 */
1234
1235 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1236 struct file *file, unsigned flags,
1237 umode_t mode)
1238 {
1239 struct dentry *d;
1240 bool excl = !!(flags & O_EXCL);
1241
1242 if (!d_in_lookup(dentry))
1243 goto skip_lookup;
1244
1245 d = __gfs2_lookup(dir, dentry, file);
1246 if (IS_ERR(d))
1247 return PTR_ERR(d);
1248 if (d != NULL)
1249 dentry = d;
1250 if (d_really_is_positive(dentry)) {
1251 if (!(file->f_mode & FMODE_OPENED))
1252 return finish_no_open(file, d);
1253 dput(d);
1254 return 0;
1255 }
1256
1257 BUG_ON(d != NULL);
1258
1259 skip_lookup:
1260 if (!(flags & O_CREAT))
1261 return -ENOENT;
1262
1263 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl);
1264 }
1265
1266 /*
1267 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1268 * @this: move this
1269 * @to: to here
1270 *
1271 * Follow @to back to the root and make sure we don't encounter @this
1272 * Assumes we already hold the rename lock.
1273 *
1274 * Returns: errno
1275 */
1276
1277 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1278 {
1279 struct inode *dir = &to->i_inode;
1280 struct super_block *sb = dir->i_sb;
1281 struct inode *tmp;
1282 int error = 0;
1283
1284 igrab(dir);
1285
1286 for (;;) {
1287 if (dir == &this->i_inode) {
1288 error = -EINVAL;
1289 break;
1290 }
1291 if (dir == d_inode(sb->s_root)) {
1292 error = 0;
1293 break;
1294 }
1295
1296 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1297 if (!tmp) {
1298 error = -ENOENT;
1299 break;
1300 }
1301 if (IS_ERR(tmp)) {
1302 error = PTR_ERR(tmp);
1303 break;
1304 }
1305
1306 iput(dir);
1307 dir = tmp;
1308 }
1309
1310 iput(dir);
1311
1312 return error;
1313 }
1314
1315 /**
1316 * update_moved_ino - Update an inode that's being moved
1317 * @ip: The inode being moved
1318 * @ndip: The parent directory of the new filename
1319 * @dir_rename: True of ip is a directory
1320 *
1321 * Returns: errno
1322 */
1323
1324 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1325 int dir_rename)
1326 {
1327 if (dir_rename)
1328 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1329
1330 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1331 mark_inode_dirty_sync(&ip->i_inode);
1332 return 0;
1333 }
1334
1335
1336 /**
1337 * gfs2_rename - Rename a file
1338 * @odir: Parent directory of old file name
1339 * @odentry: The old dentry of the file
1340 * @ndir: Parent directory of new file name
1341 * @ndentry: The new dentry of the file
1342 *
1343 * Returns: errno
1344 */
1345
1346 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1347 struct inode *ndir, struct dentry *ndentry)
1348 {
1349 struct gfs2_inode *odip = GFS2_I(odir);
1350 struct gfs2_inode *ndip = GFS2_I(ndir);
1351 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1352 struct gfs2_inode *nip = NULL;
1353 struct gfs2_sbd *sdp = GFS2_SB(odir);
1354 struct gfs2_holder ghs[5], r_gh;
1355 struct gfs2_rgrpd *nrgd;
1356 unsigned int num_gh;
1357 int dir_rename = 0;
1358 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1359 unsigned int x;
1360 int error;
1361
1362 gfs2_holder_mark_uninitialized(&r_gh);
1363 if (d_really_is_positive(ndentry)) {
1364 nip = GFS2_I(d_inode(ndentry));
1365 if (ip == nip)
1366 return 0;
1367 }
1368
1369 error = gfs2_rindex_update(sdp);
1370 if (error)
1371 return error;
1372
1373 error = gfs2_rsqa_alloc(ndip);
1374 if (error)
1375 return error;
1376
1377 if (odip != ndip) {
1378 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1379 0, &r_gh);
1380 if (error)
1381 goto out;
1382
1383 if (S_ISDIR(ip->i_inode.i_mode)) {
1384 dir_rename = 1;
1385 /* don't move a directory into its subdir */
1386 error = gfs2_ok_to_move(ip, ndip);
1387 if (error)
1388 goto out_gunlock_r;
1389 }
1390 }
1391
1392 num_gh = 1;
1393 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1394 if (odip != ndip) {
1395 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1396 num_gh++;
1397 }
1398 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1399 num_gh++;
1400
1401 if (nip) {
1402 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1403 num_gh++;
1404 /* grab the resource lock for unlink flag twiddling
1405 * this is the case of the target file already existing
1406 * so we unlink before doing the rename
1407 */
1408 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1409 if (nrgd)
1410 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
1411 }
1412
1413 for (x = 0; x < num_gh; x++) {
1414 error = gfs2_glock_nq(ghs + x);
1415 if (error)
1416 goto out_gunlock;
1417 }
1418
1419 error = -ENOENT;
1420 if (ip->i_inode.i_nlink == 0)
1421 goto out_gunlock;
1422
1423 /* Check out the old directory */
1424
1425 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1426 if (error)
1427 goto out_gunlock;
1428
1429 /* Check out the new directory */
1430
1431 if (nip) {
1432 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1433 if (error)
1434 goto out_gunlock;
1435
1436 if (nip->i_inode.i_nlink == 0) {
1437 error = -EAGAIN;
1438 goto out_gunlock;
1439 }
1440
1441 if (S_ISDIR(nip->i_inode.i_mode)) {
1442 if (nip->i_entries < 2) {
1443 gfs2_consist_inode(nip);
1444 error = -EIO;
1445 goto out_gunlock;
1446 }
1447 if (nip->i_entries > 2) {
1448 error = -ENOTEMPTY;
1449 goto out_gunlock;
1450 }
1451 }
1452 } else {
1453 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1454 if (error)
1455 goto out_gunlock;
1456
1457 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1458 switch (error) {
1459 case -ENOENT:
1460 error = 0;
1461 break;
1462 case 0:
1463 error = -EEXIST;
1464 default:
1465 goto out_gunlock;
1466 };
1467
1468 if (odip != ndip) {
1469 if (!ndip->i_inode.i_nlink) {
1470 error = -ENOENT;
1471 goto out_gunlock;
1472 }
1473 if (ndip->i_entries == (u32)-1) {
1474 error = -EFBIG;
1475 goto out_gunlock;
1476 }
1477 if (S_ISDIR(ip->i_inode.i_mode) &&
1478 ndip->i_inode.i_nlink == (u32)-1) {
1479 error = -EMLINK;
1480 goto out_gunlock;
1481 }
1482 }
1483 }
1484
1485 /* Check out the dir to be renamed */
1486
1487 if (dir_rename) {
1488 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1489 if (error)
1490 goto out_gunlock;
1491 }
1492
1493 if (nip == NULL) {
1494 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1495 if (error)
1496 goto out_gunlock;
1497 }
1498
1499 if (da.nr_blocks) {
1500 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1501 error = gfs2_quota_lock_check(ndip, &ap);
1502 if (error)
1503 goto out_gunlock;
1504
1505 error = gfs2_inplace_reserve(ndip, &ap);
1506 if (error)
1507 goto out_gunlock_q;
1508
1509 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1510 4 * RES_LEAF + 4, 0);
1511 if (error)
1512 goto out_ipreserv;
1513 } else {
1514 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1515 5 * RES_LEAF + 4, 0);
1516 if (error)
1517 goto out_gunlock;
1518 }
1519
1520 /* Remove the target file, if it exists */
1521
1522 if (nip)
1523 error = gfs2_unlink_inode(ndip, ndentry);
1524
1525 error = update_moved_ino(ip, ndip, dir_rename);
1526 if (error)
1527 goto out_end_trans;
1528
1529 error = gfs2_dir_del(odip, odentry);
1530 if (error)
1531 goto out_end_trans;
1532
1533 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1534 if (error)
1535 goto out_end_trans;
1536
1537 out_end_trans:
1538 gfs2_trans_end(sdp);
1539 out_ipreserv:
1540 if (da.nr_blocks)
1541 gfs2_inplace_release(ndip);
1542 out_gunlock_q:
1543 if (da.nr_blocks)
1544 gfs2_quota_unlock(ndip);
1545 out_gunlock:
1546 gfs2_dir_no_add(&da);
1547 while (x--) {
1548 gfs2_glock_dq(ghs + x);
1549 gfs2_holder_uninit(ghs + x);
1550 }
1551 out_gunlock_r:
1552 if (gfs2_holder_initialized(&r_gh))
1553 gfs2_glock_dq_uninit(&r_gh);
1554 out:
1555 return error;
1556 }
1557
1558 /**
1559 * gfs2_exchange - exchange two files
1560 * @odir: Parent directory of old file name
1561 * @odentry: The old dentry of the file
1562 * @ndir: Parent directory of new file name
1563 * @ndentry: The new dentry of the file
1564 * @flags: The rename flags
1565 *
1566 * Returns: errno
1567 */
1568
1569 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1570 struct inode *ndir, struct dentry *ndentry,
1571 unsigned int flags)
1572 {
1573 struct gfs2_inode *odip = GFS2_I(odir);
1574 struct gfs2_inode *ndip = GFS2_I(ndir);
1575 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1576 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1577 struct gfs2_sbd *sdp = GFS2_SB(odir);
1578 struct gfs2_holder ghs[5], r_gh;
1579 unsigned int num_gh;
1580 unsigned int x;
1581 umode_t old_mode = oip->i_inode.i_mode;
1582 umode_t new_mode = nip->i_inode.i_mode;
1583 int error;
1584
1585 gfs2_holder_mark_uninitialized(&r_gh);
1586 error = gfs2_rindex_update(sdp);
1587 if (error)
1588 return error;
1589
1590 if (odip != ndip) {
1591 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1592 0, &r_gh);
1593 if (error)
1594 goto out;
1595
1596 if (S_ISDIR(old_mode)) {
1597 /* don't move a directory into its subdir */
1598 error = gfs2_ok_to_move(oip, ndip);
1599 if (error)
1600 goto out_gunlock_r;
1601 }
1602
1603 if (S_ISDIR(new_mode)) {
1604 /* don't move a directory into its subdir */
1605 error = gfs2_ok_to_move(nip, odip);
1606 if (error)
1607 goto out_gunlock_r;
1608 }
1609 }
1610
1611 num_gh = 1;
1612 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1613 if (odip != ndip) {
1614 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1615 num_gh++;
1616 }
1617 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1618 num_gh++;
1619
1620 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1621 num_gh++;
1622
1623 for (x = 0; x < num_gh; x++) {
1624 error = gfs2_glock_nq(ghs + x);
1625 if (error)
1626 goto out_gunlock;
1627 }
1628
1629 error = -ENOENT;
1630 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1631 goto out_gunlock;
1632
1633 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1634 if (error)
1635 goto out_gunlock;
1636 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1637 if (error)
1638 goto out_gunlock;
1639
1640 if (S_ISDIR(old_mode)) {
1641 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1642 if (error)
1643 goto out_gunlock;
1644 }
1645 if (S_ISDIR(new_mode)) {
1646 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1647 if (error)
1648 goto out_gunlock;
1649 }
1650 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1651 if (error)
1652 goto out_gunlock;
1653
1654 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1655 if (error)
1656 goto out_end_trans;
1657
1658 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1659 if (error)
1660 goto out_end_trans;
1661
1662 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1663 IF2DT(old_mode));
1664 if (error)
1665 goto out_end_trans;
1666
1667 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1668 IF2DT(new_mode));
1669 if (error)
1670 goto out_end_trans;
1671
1672 if (odip != ndip) {
1673 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1674 inc_nlink(&odip->i_inode);
1675 drop_nlink(&ndip->i_inode);
1676 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1677 inc_nlink(&ndip->i_inode);
1678 drop_nlink(&odip->i_inode);
1679 }
1680 }
1681 mark_inode_dirty(&ndip->i_inode);
1682 if (odip != ndip)
1683 mark_inode_dirty(&odip->i_inode);
1684
1685 out_end_trans:
1686 gfs2_trans_end(sdp);
1687 out_gunlock:
1688 while (x--) {
1689 gfs2_glock_dq(ghs + x);
1690 gfs2_holder_uninit(ghs + x);
1691 }
1692 out_gunlock_r:
1693 if (gfs2_holder_initialized(&r_gh))
1694 gfs2_glock_dq_uninit(&r_gh);
1695 out:
1696 return error;
1697 }
1698
1699 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1700 struct inode *ndir, struct dentry *ndentry,
1701 unsigned int flags)
1702 {
1703 flags &= ~RENAME_NOREPLACE;
1704
1705 if (flags & ~RENAME_EXCHANGE)
1706 return -EINVAL;
1707
1708 if (flags & RENAME_EXCHANGE)
1709 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1710
1711 return gfs2_rename(odir, odentry, ndir, ndentry);
1712 }
1713
1714 /**
1715 * gfs2_get_link - Follow a symbolic link
1716 * @dentry: The dentry of the link
1717 * @inode: The inode of the link
1718 * @done: destructor for return value
1719 *
1720 * This can handle symlinks of any size.
1721 *
1722 * Returns: 0 on success or error code
1723 */
1724
1725 static const char *gfs2_get_link(struct dentry *dentry,
1726 struct inode *inode,
1727 struct delayed_call *done)
1728 {
1729 struct gfs2_inode *ip = GFS2_I(inode);
1730 struct gfs2_holder i_gh;
1731 struct buffer_head *dibh;
1732 unsigned int size;
1733 char *buf;
1734 int error;
1735
1736 if (!dentry)
1737 return ERR_PTR(-ECHILD);
1738
1739 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1740 error = gfs2_glock_nq(&i_gh);
1741 if (error) {
1742 gfs2_holder_uninit(&i_gh);
1743 return ERR_PTR(error);
1744 }
1745
1746 size = (unsigned int)i_size_read(&ip->i_inode);
1747 if (size == 0) {
1748 gfs2_consist_inode(ip);
1749 buf = ERR_PTR(-EIO);
1750 goto out;
1751 }
1752
1753 error = gfs2_meta_inode_buffer(ip, &dibh);
1754 if (error) {
1755 buf = ERR_PTR(error);
1756 goto out;
1757 }
1758
1759 buf = kzalloc(size + 1, GFP_NOFS);
1760 if (!buf)
1761 buf = ERR_PTR(-ENOMEM);
1762 else
1763 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1764 brelse(dibh);
1765 out:
1766 gfs2_glock_dq_uninit(&i_gh);
1767 if (!IS_ERR(buf))
1768 set_delayed_call(done, kfree_link, buf);
1769 return buf;
1770 }
1771
1772 /**
1773 * gfs2_permission -
1774 * @inode: The inode
1775 * @mask: The mask to be tested
1776 * @flags: Indicates whether this is an RCU path walk or not
1777 *
1778 * This may be called from the VFS directly, or from within GFS2 with the
1779 * inode locked, so we look to see if the glock is already locked and only
1780 * lock the glock if its not already been done.
1781 *
1782 * Returns: errno
1783 */
1784
1785 int gfs2_permission(struct inode *inode, int mask)
1786 {
1787 struct gfs2_inode *ip;
1788 struct gfs2_holder i_gh;
1789 int error;
1790
1791 gfs2_holder_mark_uninitialized(&i_gh);
1792 ip = GFS2_I(inode);
1793 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1794 if (mask & MAY_NOT_BLOCK)
1795 return -ECHILD;
1796 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1797 if (error)
1798 return error;
1799 }
1800
1801 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1802 error = -EPERM;
1803 else
1804 error = generic_permission(inode, mask);
1805 if (gfs2_holder_initialized(&i_gh))
1806 gfs2_glock_dq_uninit(&i_gh);
1807
1808 return error;
1809 }
1810
1811 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1812 {
1813 setattr_copy(inode, attr);
1814 mark_inode_dirty(inode);
1815 return 0;
1816 }
1817
1818 /**
1819 * gfs2_setattr_simple -
1820 * @ip:
1821 * @attr:
1822 *
1823 * Returns: errno
1824 */
1825
1826 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1827 {
1828 int error;
1829
1830 if (current->journal_info)
1831 return __gfs2_setattr_simple(inode, attr);
1832
1833 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1834 if (error)
1835 return error;
1836
1837 error = __gfs2_setattr_simple(inode, attr);
1838 gfs2_trans_end(GFS2_SB(inode));
1839 return error;
1840 }
1841
1842 static int setattr_chown(struct inode *inode, struct iattr *attr)
1843 {
1844 struct gfs2_inode *ip = GFS2_I(inode);
1845 struct gfs2_sbd *sdp = GFS2_SB(inode);
1846 kuid_t ouid, nuid;
1847 kgid_t ogid, ngid;
1848 int error;
1849 struct gfs2_alloc_parms ap;
1850
1851 ouid = inode->i_uid;
1852 ogid = inode->i_gid;
1853 nuid = attr->ia_uid;
1854 ngid = attr->ia_gid;
1855
1856 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1857 ouid = nuid = NO_UID_QUOTA_CHANGE;
1858 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1859 ogid = ngid = NO_GID_QUOTA_CHANGE;
1860
1861 error = gfs2_rsqa_alloc(ip);
1862 if (error)
1863 goto out;
1864
1865 error = gfs2_rindex_update(sdp);
1866 if (error)
1867 goto out;
1868
1869 error = gfs2_quota_lock(ip, nuid, ngid);
1870 if (error)
1871 goto out;
1872
1873 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1874
1875 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1876 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1877 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1878 if (error)
1879 goto out_gunlock_q;
1880 }
1881
1882 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1883 if (error)
1884 goto out_gunlock_q;
1885
1886 error = gfs2_setattr_simple(inode, attr);
1887 if (error)
1888 goto out_end_trans;
1889
1890 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1891 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1892 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1893 gfs2_quota_change(ip, ap.target, nuid, ngid);
1894 }
1895
1896 out_end_trans:
1897 gfs2_trans_end(sdp);
1898 out_gunlock_q:
1899 gfs2_quota_unlock(ip);
1900 out:
1901 return error;
1902 }
1903
1904 /**
1905 * gfs2_setattr - Change attributes on an inode
1906 * @dentry: The dentry which is changing
1907 * @attr: The structure describing the change
1908 *
1909 * The VFS layer wants to change one or more of an inodes attributes. Write
1910 * that change out to disk.
1911 *
1912 * Returns: errno
1913 */
1914
1915 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1916 {
1917 struct inode *inode = d_inode(dentry);
1918 struct gfs2_inode *ip = GFS2_I(inode);
1919 struct gfs2_holder i_gh;
1920 int error;
1921
1922 error = gfs2_rsqa_alloc(ip);
1923 if (error)
1924 return error;
1925
1926 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1927 if (error)
1928 return error;
1929
1930 error = -EPERM;
1931 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1932 goto out;
1933
1934 error = setattr_prepare(dentry, attr);
1935 if (error)
1936 goto out;
1937
1938 if (attr->ia_valid & ATTR_SIZE)
1939 error = gfs2_setattr_size(inode, attr->ia_size);
1940 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1941 error = setattr_chown(inode, attr);
1942 else {
1943 error = gfs2_setattr_simple(inode, attr);
1944 if (!error && attr->ia_valid & ATTR_MODE)
1945 error = posix_acl_chmod(inode, inode->i_mode);
1946 }
1947
1948 out:
1949 if (!error)
1950 mark_inode_dirty(inode);
1951 gfs2_glock_dq_uninit(&i_gh);
1952 return error;
1953 }
1954
1955 /**
1956 * gfs2_getattr - Read out an inode's attributes
1957 * @path: Object to query
1958 * @stat: The inode's stats
1959 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests
1960 * @flags: AT_STATX_xxx setting
1961 *
1962 * This may be called from the VFS directly, or from within GFS2 with the
1963 * inode locked, so we look to see if the glock is already locked and only
1964 * lock the glock if its not already been done. Note that its the NFS
1965 * readdirplus operation which causes this to be called (from filldir)
1966 * with the glock already held.
1967 *
1968 * Returns: errno
1969 */
1970
1971 static int gfs2_getattr(const struct path *path, struct kstat *stat,
1972 u32 request_mask, unsigned int flags)
1973 {
1974 struct inode *inode = d_inode(path->dentry);
1975 struct gfs2_inode *ip = GFS2_I(inode);
1976 struct gfs2_holder gh;
1977 u32 gfsflags;
1978 int error;
1979
1980 gfs2_holder_mark_uninitialized(&gh);
1981 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1982 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1983 if (error)
1984 return error;
1985 }
1986
1987 gfsflags = ip->i_diskflags;
1988 if (gfsflags & GFS2_DIF_APPENDONLY)
1989 stat->attributes |= STATX_ATTR_APPEND;
1990 if (gfsflags & GFS2_DIF_IMMUTABLE)
1991 stat->attributes |= STATX_ATTR_IMMUTABLE;
1992
1993 stat->attributes_mask |= (STATX_ATTR_APPEND |
1994 STATX_ATTR_COMPRESSED |
1995 STATX_ATTR_ENCRYPTED |
1996 STATX_ATTR_IMMUTABLE |
1997 STATX_ATTR_NODUMP);
1998
1999 generic_fillattr(inode, stat);
2000
2001 if (gfs2_holder_initialized(&gh))
2002 gfs2_glock_dq_uninit(&gh);
2003
2004 return 0;
2005 }
2006
2007 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2008 u64 start, u64 len)
2009 {
2010 struct gfs2_inode *ip = GFS2_I(inode);
2011 struct gfs2_holder gh;
2012 int ret;
2013
2014 inode_lock_shared(inode);
2015
2016 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2017 if (ret)
2018 goto out;
2019
2020 ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops);
2021
2022 gfs2_glock_dq_uninit(&gh);
2023
2024 out:
2025 inode_unlock_shared(inode);
2026 return ret;
2027 }
2028
2029 loff_t gfs2_seek_data(struct file *file, loff_t offset)
2030 {
2031 struct inode *inode = file->f_mapping->host;
2032 struct gfs2_inode *ip = GFS2_I(inode);
2033 struct gfs2_holder gh;
2034 loff_t ret;
2035
2036 inode_lock_shared(inode);
2037 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2038 if (!ret)
2039 ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops);
2040 gfs2_glock_dq_uninit(&gh);
2041 inode_unlock_shared(inode);
2042
2043 if (ret < 0)
2044 return ret;
2045 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
2046 }
2047
2048 loff_t gfs2_seek_hole(struct file *file, loff_t offset)
2049 {
2050 struct inode *inode = file->f_mapping->host;
2051 struct gfs2_inode *ip = GFS2_I(inode);
2052 struct gfs2_holder gh;
2053 loff_t ret;
2054
2055 inode_lock_shared(inode);
2056 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2057 if (!ret)
2058 ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops);
2059 gfs2_glock_dq_uninit(&gh);
2060 inode_unlock_shared(inode);
2061
2062 if (ret < 0)
2063 return ret;
2064 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
2065 }
2066
2067 const struct inode_operations gfs2_file_iops = {
2068 .permission = gfs2_permission,
2069 .setattr = gfs2_setattr,
2070 .getattr = gfs2_getattr,
2071 .listxattr = gfs2_listxattr,
2072 .fiemap = gfs2_fiemap,
2073 .get_acl = gfs2_get_acl,
2074 .set_acl = gfs2_set_acl,
2075 };
2076
2077 const struct inode_operations gfs2_dir_iops = {
2078 .create = gfs2_create,
2079 .lookup = gfs2_lookup,
2080 .link = gfs2_link,
2081 .unlink = gfs2_unlink,
2082 .symlink = gfs2_symlink,
2083 .mkdir = gfs2_mkdir,
2084 .rmdir = gfs2_unlink,
2085 .mknod = gfs2_mknod,
2086 .rename = gfs2_rename2,
2087 .permission = gfs2_permission,
2088 .setattr = gfs2_setattr,
2089 .getattr = gfs2_getattr,
2090 .listxattr = gfs2_listxattr,
2091 .fiemap = gfs2_fiemap,
2092 .get_acl = gfs2_get_acl,
2093 .set_acl = gfs2_set_acl,
2094 .atomic_open = gfs2_atomic_open,
2095 };
2096
2097 const struct inode_operations gfs2_symlink_iops = {
2098 .get_link = gfs2_get_link,
2099 .permission = gfs2_permission,
2100 .setattr = gfs2_setattr,
2101 .getattr = gfs2_getattr,
2102 .listxattr = gfs2_listxattr,
2103 .fiemap = gfs2_fiemap,
2104 };
2105
(deprecated) Btrfs devel tree