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ASoC: intel: Replace kthread with work
[linux/fpc-iii.git] / fs / gfs2 / inode.c
blobfe3f84995c486f139651518e3dd58cc6c447d899
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/xattr.h>
17 #include <linux/posix_acl.h>
18 #include <linux/gfs2_ondisk.h>
19 #include <linux/crc32.h>
20 #include <linux/fiemap.h>
21 #include <linux/security.h>
22 #include <asm/uaccess.h>
23
24 #include "gfs2.h"
25 #include "incore.h"
26 #include "acl.h"
27 #include "bmap.h"
28 #include "dir.h"
29 #include "xattr.h"
30 #include "glock.h"
31 #include "inode.h"
32 #include "meta_io.h"
33 #include "quota.h"
34 #include "rgrp.h"
35 #include "trans.h"
36 #include "util.h"
37 #include "super.h"
38 #include "glops.h"
39
40 static int iget_test(struct inode *inode, void *opaque)
41 {
42 u64 no_addr = *(u64 *)opaque;
43
44 return GFS2_I(inode)->i_no_addr == no_addr;
45 }
46
47 static int iget_set(struct inode *inode, void *opaque)
48 {
49 u64 no_addr = *(u64 *)opaque;
50
51 GFS2_I(inode)->i_no_addr = no_addr;
52 inode->i_ino = no_addr;
53 return 0;
54 }
55
56 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
57 {
58 struct inode *inode;
59
60 repeat:
61 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr);
62 if (!inode)
63 return inode;
64 if (is_bad_inode(inode)) {
65 iput(inode);
66 goto repeat;
67 }
68 return inode;
69 }
70
71 /**
72 * gfs2_set_iop - Sets inode operations
73 * @inode: The inode with correct i_mode filled in
74 *
75 * GFS2 lookup code fills in vfs inode contents based on info obtained
76 * from directory entry inside gfs2_inode_lookup().
77 */
78
79 static void gfs2_set_iop(struct inode *inode)
80 {
81 struct gfs2_sbd *sdp = GFS2_SB(inode);
82 umode_t mode = inode->i_mode;
83
84 if (S_ISREG(mode)) {
85 inode->i_op = &gfs2_file_iops;
86 if (gfs2_localflocks(sdp))
87 inode->i_fop = &gfs2_file_fops_nolock;
88 else
89 inode->i_fop = &gfs2_file_fops;
90 } else if (S_ISDIR(mode)) {
91 inode->i_op = &gfs2_dir_iops;
92 if (gfs2_localflocks(sdp))
93 inode->i_fop = &gfs2_dir_fops_nolock;
94 else
95 inode->i_fop = &gfs2_dir_fops;
96 } else if (S_ISLNK(mode)) {
97 inode->i_op = &gfs2_symlink_iops;
98 } else {
99 inode->i_op = &gfs2_file_iops;
100 init_special_inode(inode, inode->i_mode, inode->i_rdev);
101 }
102 }
103
104 /**
105 * gfs2_inode_lookup - Lookup an inode
106 * @sb: The super block
107 * @type: The type of the inode
108 * @no_addr: The inode number
109 * @no_formal_ino: The inode generation number
110 * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED;
111 * GFS2_BLKST_FREE do indicate not to verify)
112 *
113 * If @type is DT_UNKNOWN, the inode type is fetched from disk.
114 *
115 * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a
116 * placeholder because it doesn't otherwise make sense), the on-disk block type
117 * is verified to be @blktype.
118 *
119 * Returns: A VFS inode, or an error
120 */
121
122 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
123 u64 no_addr, u64 no_formal_ino,
124 unsigned int blktype)
125 {
126 struct inode *inode;
127 struct gfs2_inode *ip;
128 struct gfs2_glock *io_gl = NULL;
129 struct gfs2_holder i_gh;
130 int error;
131
132 gfs2_holder_mark_uninitialized(&i_gh);
133 inode = gfs2_iget(sb, no_addr);
134 if (!inode)
135 return ERR_PTR(-ENOMEM);
136
137 ip = GFS2_I(inode);
138
139 if (inode->i_state & I_NEW) {
140 struct gfs2_sbd *sdp = GFS2_SB(inode);
141 ip->i_no_formal_ino = no_formal_ino;
142
143 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
144 if (unlikely(error))
145 goto fail;
146 ip->i_gl->gl_object = ip;
147
148 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
149 if (unlikely(error))
150 goto fail_put;
151
152 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
153 /*
154 * The GL_SKIP flag indicates to skip reading the inode
155 * block. We read the inode with gfs2_inode_refresh
156 * after possibly checking the block type.
157 */
158 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
159 GL_SKIP, &i_gh);
160 if (error)
161 goto fail_put;
162
163 if (blktype != GFS2_BLKST_FREE) {
164 error = gfs2_check_blk_type(sdp, no_addr,
165 blktype);
166 if (error)
167 goto fail_put;
168 }
169 }
170
171 set_bit(GIF_INVALID, &ip->i_flags);
172 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
173 if (unlikely(error))
174 goto fail_put;
175
176 ip->i_iopen_gh.gh_gl->gl_object = ip;
177 gfs2_glock_put(io_gl);
178 io_gl = NULL;
179
180 if (type == DT_UNKNOWN) {
181 /* Inode glock must be locked already */
182 error = gfs2_inode_refresh(GFS2_I(inode));
183 if (error)
184 goto fail_refresh;
185 } else {
186 inode->i_mode = DT2IF(type);
187 }
188
189 gfs2_set_iop(inode);
190
191 inode->i_atime.tv_sec = 0;
192 inode->i_atime.tv_nsec = 0;
193
194 unlock_new_inode(inode);
195 }
196
197 if (gfs2_holder_initialized(&i_gh))
198 gfs2_glock_dq_uninit(&i_gh);
199 return inode;
200
201 fail_refresh:
202 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
203 ip->i_iopen_gh.gh_gl->gl_object = NULL;
204 gfs2_glock_dq_wait(&ip->i_iopen_gh);
205 gfs2_holder_uninit(&ip->i_iopen_gh);
206 fail_put:
207 if (io_gl)
208 gfs2_glock_put(io_gl);
209 if (gfs2_holder_initialized(&i_gh))
210 gfs2_glock_dq_uninit(&i_gh);
211 ip->i_gl->gl_object = NULL;
212 fail:
213 iget_failed(inode);
214 return ERR_PTR(error);
215 }
216
217 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
218 u64 *no_formal_ino, unsigned int blktype)
219 {
220 struct super_block *sb = sdp->sd_vfs;
221 struct inode *inode;
222 int error;
223
224 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype);
225 if (IS_ERR(inode))
226 return inode;
227
228 /* Two extra checks for NFS only */
229 if (no_formal_ino) {
230 error = -ESTALE;
231 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
232 goto fail_iput;
233
234 error = -EIO;
235 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
236 goto fail_iput;
237 }
238 return inode;
239
240 fail_iput:
241 iput(inode);
242 return ERR_PTR(error);
243 }
244
245
246 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
247 {
248 struct qstr qstr;
249 struct inode *inode;
250 gfs2_str2qstr(&qstr, name);
251 inode = gfs2_lookupi(dip, &qstr, 1);
252 /* gfs2_lookupi has inconsistent callers: vfs
253 * related routines expect NULL for no entry found,
254 * gfs2_lookup_simple callers expect ENOENT
255 * and do not check for NULL.
256 */
257 if (inode == NULL)
258 return ERR_PTR(-ENOENT);
259 else
260 return inode;
261 }
262
263
264 /**
265 * gfs2_lookupi - Look up a filename in a directory and return its inode
266 * @d_gh: An initialized holder for the directory glock
267 * @name: The name of the inode to look for
268 * @is_root: If 1, ignore the caller's permissions
269 * @i_gh: An uninitialized holder for the new inode glock
270 *
271 * This can be called via the VFS filldir function when NFS is doing
272 * a readdirplus and the inode which its intending to stat isn't
273 * already in cache. In this case we must not take the directory glock
274 * again, since the readdir call will have already taken that lock.
275 *
276 * Returns: errno
277 */
278
279 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
280 int is_root)
281 {
282 struct super_block *sb = dir->i_sb;
283 struct gfs2_inode *dip = GFS2_I(dir);
284 struct gfs2_holder d_gh;
285 int error = 0;
286 struct inode *inode = NULL;
287
288 gfs2_holder_mark_uninitialized(&d_gh);
289 if (!name->len || name->len > GFS2_FNAMESIZE)
290 return ERR_PTR(-ENAMETOOLONG);
291
292 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
293 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
294 dir == d_inode(sb->s_root))) {
295 igrab(dir);
296 return dir;
297 }
298
299 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
300 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
301 if (error)
302 return ERR_PTR(error);
303 }
304
305 if (!is_root) {
306 error = gfs2_permission(dir, MAY_EXEC);
307 if (error)
308 goto out;
309 }
310
311 inode = gfs2_dir_search(dir, name, false);
312 if (IS_ERR(inode))
313 error = PTR_ERR(inode);
314 out:
315 if (gfs2_holder_initialized(&d_gh))
316 gfs2_glock_dq_uninit(&d_gh);
317 if (error == -ENOENT)
318 return NULL;
319 return inode ? inode : ERR_PTR(error);
320 }
321
322 /**
323 * create_ok - OK to create a new on-disk inode here?
324 * @dip: Directory in which dinode is to be created
325 * @name: Name of new dinode
326 * @mode:
327 *
328 * Returns: errno
329 */
330
331 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
332 umode_t mode)
333 {
334 int error;
335
336 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
337 if (error)
338 return error;
339
340 /* Don't create entries in an unlinked directory */
341 if (!dip->i_inode.i_nlink)
342 return -ENOENT;
343
344 if (dip->i_entries == (u32)-1)
345 return -EFBIG;
346 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
347 return -EMLINK;
348
349 return 0;
350 }
351
352 static void munge_mode_uid_gid(const struct gfs2_inode *dip,
353 struct inode *inode)
354 {
355 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
356 (dip->i_inode.i_mode & S_ISUID) &&
357 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
358 if (S_ISDIR(inode->i_mode))
359 inode->i_mode |= S_ISUID;
360 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
361 inode->i_mode &= ~07111;
362 inode->i_uid = dip->i_inode.i_uid;
363 } else
364 inode->i_uid = current_fsuid();
365
366 if (dip->i_inode.i_mode & S_ISGID) {
367 if (S_ISDIR(inode->i_mode))
368 inode->i_mode |= S_ISGID;
369 inode->i_gid = dip->i_inode.i_gid;
370 } else
371 inode->i_gid = current_fsgid();
372 }
373
374 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
375 {
376 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
377 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
378 int error;
379
380 error = gfs2_quota_lock_check(ip, &ap);
381 if (error)
382 goto out;
383
384 error = gfs2_inplace_reserve(ip, &ap);
385 if (error)
386 goto out_quota;
387
388 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
389 if (error)
390 goto out_ipreserv;
391
392 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
393 ip->i_no_formal_ino = ip->i_generation;
394 ip->i_inode.i_ino = ip->i_no_addr;
395 ip->i_goal = ip->i_no_addr;
396
397 gfs2_trans_end(sdp);
398
399 out_ipreserv:
400 gfs2_inplace_release(ip);
401 out_quota:
402 gfs2_quota_unlock(ip);
403 out:
404 return error;
405 }
406
407 static void gfs2_init_dir(struct buffer_head *dibh,
408 const struct gfs2_inode *parent)
409 {
410 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
411 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
412
413 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
414 dent->de_inum = di->di_num; /* already GFS2 endian */
415 dent->de_type = cpu_to_be16(DT_DIR);
416
417 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
418 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
419 gfs2_inum_out(parent, dent);
420 dent->de_type = cpu_to_be16(DT_DIR);
421
422 }
423
424 /**
425 * gfs2_init_xattr - Initialise an xattr block for a new inode
426 * @ip: The inode in question
427 *
428 * This sets up an empty xattr block for a new inode, ready to
429 * take any ACLs, LSM xattrs, etc.
430 */
431
432 static void gfs2_init_xattr(struct gfs2_inode *ip)
433 {
434 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
435 struct buffer_head *bh;
436 struct gfs2_ea_header *ea;
437
438 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
439 gfs2_trans_add_meta(ip->i_gl, bh);
440 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
441 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
442
443 ea = GFS2_EA_BH2FIRST(bh);
444 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
445 ea->ea_type = GFS2_EATYPE_UNUSED;
446 ea->ea_flags = GFS2_EAFLAG_LAST;
447
448 brelse(bh);
449 }
450
451 /**
452 * init_dinode - Fill in a new dinode structure
453 * @dip: The directory this inode is being created in
454 * @ip: The inode
455 * @symname: The symlink destination (if a symlink)
456 * @bhp: The buffer head (returned to caller)
457 *
458 */
459
460 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
461 const char *symname)
462 {
463 struct gfs2_dinode *di;
464 struct buffer_head *dibh;
465
466 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
467 gfs2_trans_add_meta(ip->i_gl, dibh);
468 di = (struct gfs2_dinode *)dibh->b_data;
469 gfs2_dinode_out(ip, di);
470
471 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
472 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
473 di->__pad1 = 0;
474 di->__pad2 = 0;
475 di->__pad3 = 0;
476 memset(&di->__pad4, 0, sizeof(di->__pad4));
477 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
478 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
479
480 switch(ip->i_inode.i_mode & S_IFMT) {
481 case S_IFDIR:
482 gfs2_init_dir(dibh, dip);
483 break;
484 case S_IFLNK:
485 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
486 break;
487 }
488
489 set_buffer_uptodate(dibh);
490 brelse(dibh);
491 }
492
493 /**
494 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
495 * @dip: The directory we are linking into
496 * @da: The dir add information
497 * @nr_inodes: The number of inodes involved
498 *
499 * This calculate the number of blocks we need to reserve in a
500 * transaction to link @nr_inodes into a directory. In most cases
501 * @nr_inodes will be 2 (the directory plus the inode being linked in)
502 * but in case of rename, 4 may be required.
503 *
504 * Returns: Number of blocks
505 */
506
507 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
508 const struct gfs2_diradd *da,
509 unsigned nr_inodes)
510 {
511 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
512 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
513 }
514
515 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
516 struct gfs2_inode *ip, struct gfs2_diradd *da)
517 {
518 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
519 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
520 int error;
521
522 if (da->nr_blocks) {
523 error = gfs2_quota_lock_check(dip, &ap);
524 if (error)
525 goto fail_quota_locks;
526
527 error = gfs2_inplace_reserve(dip, &ap);
528 if (error)
529 goto fail_quota_locks;
530
531 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
532 if (error)
533 goto fail_ipreserv;
534 } else {
535 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
536 if (error)
537 goto fail_quota_locks;
538 }
539
540 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
541
542 gfs2_trans_end(sdp);
543 fail_ipreserv:
544 gfs2_inplace_release(dip);
545 fail_quota_locks:
546 gfs2_quota_unlock(dip);
547 return error;
548 }
549
550 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
551 void *fs_info)
552 {
553 const struct xattr *xattr;
554 int err = 0;
555
556 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
557 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
558 xattr->value_len, 0,
559 GFS2_EATYPE_SECURITY);
560 if (err < 0)
561 break;
562 }
563 return err;
564 }
565
566 /**
567 * gfs2_create_inode - Create a new inode
568 * @dir: The parent directory
569 * @dentry: The new dentry
570 * @file: If non-NULL, the file which is being opened
571 * @mode: The permissions on the new inode
572 * @dev: For device nodes, this is the device number
573 * @symname: For symlinks, this is the link destination
574 * @size: The initial size of the inode (ignored for directories)
575 *
576 * Returns: 0 on success, or error code
577 */
578
579 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
580 struct file *file,
581 umode_t mode, dev_t dev, const char *symname,
582 unsigned int size, int excl, int *opened)
583 {
584 const struct qstr *name = &dentry->d_name;
585 struct posix_acl *default_acl, *acl;
586 struct gfs2_holder ghs[2];
587 struct inode *inode = NULL;
588 struct gfs2_inode *dip = GFS2_I(dir), *ip;
589 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
590 struct gfs2_glock *io_gl = NULL;
591 int error, free_vfs_inode = 1;
592 u32 aflags = 0;
593 unsigned blocks = 1;
594 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
595
596 if (!name->len || name->len > GFS2_FNAMESIZE)
597 return -ENAMETOOLONG;
598
599 error = gfs2_rsqa_alloc(dip);
600 if (error)
601 return error;
602
603 error = gfs2_rindex_update(sdp);
604 if (error)
605 return error;
606
607 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
608 if (error)
609 goto fail;
610
611 error = create_ok(dip, name, mode);
612 if (error)
613 goto fail_gunlock;
614
615 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
616 error = PTR_ERR(inode);
617 if (!IS_ERR(inode)) {
618 if (S_ISDIR(inode->i_mode)) {
619 iput(inode);
620 inode = ERR_PTR(-EISDIR);
621 goto fail_gunlock;
622 }
623 d_instantiate(dentry, inode);
624 error = 0;
625 if (file) {
626 if (S_ISREG(inode->i_mode))
627 error = finish_open(file, dentry, gfs2_open_common, opened);
628 else
629 error = finish_no_open(file, NULL);
630 }
631 gfs2_glock_dq_uninit(ghs);
632 return error;
633 } else if (error != -ENOENT) {
634 goto fail_gunlock;
635 }
636
637 error = gfs2_diradd_alloc_required(dir, name, &da);
638 if (error < 0)
639 goto fail_gunlock;
640
641 inode = new_inode(sdp->sd_vfs);
642 error = -ENOMEM;
643 if (!inode)
644 goto fail_gunlock;
645
646 error = posix_acl_create(dir, &mode, &default_acl, &acl);
647 if (error)
648 goto fail_gunlock;
649
650 ip = GFS2_I(inode);
651 error = gfs2_rsqa_alloc(ip);
652 if (error)
653 goto fail_free_acls;
654
655 inode->i_mode = mode;
656 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
657 inode->i_rdev = dev;
658 inode->i_size = size;
659 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
660 gfs2_set_inode_blocks(inode, 1);
661 munge_mode_uid_gid(dip, inode);
662 check_and_update_goal(dip);
663 ip->i_goal = dip->i_goal;
664 ip->i_diskflags = 0;
665 ip->i_eattr = 0;
666 ip->i_height = 0;
667 ip->i_depth = 0;
668 ip->i_entries = 0;
669
670 switch(mode & S_IFMT) {
671 case S_IFREG:
672 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
673 gfs2_tune_get(sdp, gt_new_files_jdata))
674 ip->i_diskflags |= GFS2_DIF_JDATA;
675 gfs2_set_aops(inode);
676 break;
677 case S_IFDIR:
678 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
679 ip->i_diskflags |= GFS2_DIF_JDATA;
680 ip->i_entries = 2;
681 break;
682 }
683
684 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
685 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
686 ip->i_diskflags |= GFS2_DIF_SYSTEM;
687
688 gfs2_set_inode_flags(inode);
689
690 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
691 (dip->i_diskflags & GFS2_DIF_TOPDIR))
692 aflags |= GFS2_AF_ORLOV;
693
694 if (default_acl || acl)
695 blocks++;
696
697 error = alloc_dinode(ip, aflags, &blocks);
698 if (error)
699 goto fail_free_inode;
700
701 gfs2_set_inode_blocks(inode, blocks);
702
703 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
704 if (error)
705 goto fail_free_inode;
706
707 ip->i_gl->gl_object = ip;
708 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
709 if (error)
710 goto fail_free_inode;
711
712 error = gfs2_trans_begin(sdp, blocks, 0);
713 if (error)
714 goto fail_gunlock2;
715
716 if (blocks > 1) {
717 ip->i_eattr = ip->i_no_addr + 1;
718 gfs2_init_xattr(ip);
719 }
720 init_dinode(dip, ip, symname);
721 gfs2_trans_end(sdp);
722
723 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
724 if (error)
725 goto fail_gunlock2;
726
727 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
728
729 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
730 if (error)
731 goto fail_gunlock2;
732
733 ip->i_iopen_gh.gh_gl->gl_object = ip;
734 gfs2_glock_put(io_gl);
735 gfs2_set_iop(inode);
736 insert_inode_hash(inode);
737
738 free_vfs_inode = 0; /* After this point, the inode is no longer
739 considered free. Any failures need to undo
740 the gfs2 structures. */
741 if (default_acl) {
742 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
743 posix_acl_release(default_acl);
744 }
745 if (acl) {
746 if (!error)
747 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
748 posix_acl_release(acl);
749 }
750
751 if (error)
752 goto fail_gunlock3;
753
754 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
755 &gfs2_initxattrs, NULL);
756 if (error)
757 goto fail_gunlock3;
758
759 error = link_dinode(dip, name, ip, &da);
760 if (error)
761 goto fail_gunlock3;
762
763 mark_inode_dirty(inode);
764 d_instantiate(dentry, inode);
765 if (file) {
766 *opened |= FILE_CREATED;
767 error = finish_open(file, dentry, gfs2_open_common, opened);
768 }
769 gfs2_glock_dq_uninit(ghs);
770 gfs2_glock_dq_uninit(ghs + 1);
771 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
772 return error;
773
774 fail_gunlock3:
775 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
776 gfs2_glock_put(io_gl);
777 fail_gunlock2:
778 if (io_gl)
779 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
780 gfs2_glock_dq_uninit(ghs + 1);
781 fail_free_inode:
782 if (ip->i_gl)
783 gfs2_glock_put(ip->i_gl);
784 gfs2_rsqa_delete(ip, NULL);
785 fail_free_acls:
786 if (default_acl)
787 posix_acl_release(default_acl);
788 if (acl)
789 posix_acl_release(acl);
790 fail_gunlock:
791 gfs2_dir_no_add(&da);
792 gfs2_glock_dq_uninit(ghs);
793 if (inode && !IS_ERR(inode)) {
794 clear_nlink(inode);
795 if (!free_vfs_inode)
796 mark_inode_dirty(inode);
797 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
798 &GFS2_I(inode)->i_flags);
799 iput(inode);
800 }
801 fail:
802 return error;
803 }
804
805 /**
806 * gfs2_create - Create a file
807 * @dir: The directory in which to create the file
808 * @dentry: The dentry of the new file
809 * @mode: The mode of the new file
810 *
811 * Returns: errno
812 */
813
814 static int gfs2_create(struct inode *dir, struct dentry *dentry,
815 umode_t mode, bool excl)
816 {
817 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL);
818 }
819
820 /**
821 * __gfs2_lookup - Look up a filename in a directory and return its inode
822 * @dir: The directory inode
823 * @dentry: The dentry of the new inode
824 * @file: File to be opened
825 * @opened: atomic_open flags
826 *
827 *
828 * Returns: errno
829 */
830
831 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
832 struct file *file, int *opened)
833 {
834 struct inode *inode;
835 struct dentry *d;
836 struct gfs2_holder gh;
837 struct gfs2_glock *gl;
838 int error;
839
840 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
841 if (inode == NULL) {
842 d_add(dentry, NULL);
843 return NULL;
844 }
845 if (IS_ERR(inode))
846 return ERR_CAST(inode);
847
848 gl = GFS2_I(inode)->i_gl;
849 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
850 if (error) {
851 iput(inode);
852 return ERR_PTR(error);
853 }
854
855 d = d_splice_alias(inode, dentry);
856 if (IS_ERR(d)) {
857 gfs2_glock_dq_uninit(&gh);
858 return d;
859 }
860 if (file && S_ISREG(inode->i_mode))
861 error = finish_open(file, dentry, gfs2_open_common, opened);
862
863 gfs2_glock_dq_uninit(&gh);
864 if (error) {
865 dput(d);
866 return ERR_PTR(error);
867 }
868 return d;
869 }
870
871 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
872 unsigned flags)
873 {
874 return __gfs2_lookup(dir, dentry, NULL, NULL);
875 }
876
877 /**
878 * gfs2_link - Link to a file
879 * @old_dentry: The inode to link
880 * @dir: Add link to this directory
881 * @dentry: The name of the link
882 *
883 * Link the inode in "old_dentry" into the directory "dir" with the
884 * name in "dentry".
885 *
886 * Returns: errno
887 */
888
889 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
890 struct dentry *dentry)
891 {
892 struct gfs2_inode *dip = GFS2_I(dir);
893 struct gfs2_sbd *sdp = GFS2_SB(dir);
894 struct inode *inode = d_inode(old_dentry);
895 struct gfs2_inode *ip = GFS2_I(inode);
896 struct gfs2_holder ghs[2];
897 struct buffer_head *dibh;
898 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
899 int error;
900
901 if (S_ISDIR(inode->i_mode))
902 return -EPERM;
903
904 error = gfs2_rsqa_alloc(dip);
905 if (error)
906 return error;
907
908 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
909 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
910
911 error = gfs2_glock_nq(ghs); /* parent */
912 if (error)
913 goto out_parent;
914
915 error = gfs2_glock_nq(ghs + 1); /* child */
916 if (error)
917 goto out_child;
918
919 error = -ENOENT;
920 if (inode->i_nlink == 0)
921 goto out_gunlock;
922
923 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
924 if (error)
925 goto out_gunlock;
926
927 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
928 switch (error) {
929 case -ENOENT:
930 break;
931 case 0:
932 error = -EEXIST;
933 default:
934 goto out_gunlock;
935 }
936
937 error = -EINVAL;
938 if (!dip->i_inode.i_nlink)
939 goto out_gunlock;
940 error = -EFBIG;
941 if (dip->i_entries == (u32)-1)
942 goto out_gunlock;
943 error = -EPERM;
944 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
945 goto out_gunlock;
946 error = -EINVAL;
947 if (!ip->i_inode.i_nlink)
948 goto out_gunlock;
949 error = -EMLINK;
950 if (ip->i_inode.i_nlink == (u32)-1)
951 goto out_gunlock;
952
953 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
954 if (error < 0)
955 goto out_gunlock;
956
957 if (da.nr_blocks) {
958 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
959 error = gfs2_quota_lock_check(dip, &ap);
960 if (error)
961 goto out_gunlock;
962
963 error = gfs2_inplace_reserve(dip, &ap);
964 if (error)
965 goto out_gunlock_q;
966
967 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
968 if (error)
969 goto out_ipres;
970 } else {
971 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
972 if (error)
973 goto out_ipres;
974 }
975
976 error = gfs2_meta_inode_buffer(ip, &dibh);
977 if (error)
978 goto out_end_trans;
979
980 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
981 if (error)
982 goto out_brelse;
983
984 gfs2_trans_add_meta(ip->i_gl, dibh);
985 inc_nlink(&ip->i_inode);
986 ip->i_inode.i_ctime = current_time(&ip->i_inode);
987 ihold(inode);
988 d_instantiate(dentry, inode);
989 mark_inode_dirty(inode);
990
991 out_brelse:
992 brelse(dibh);
993 out_end_trans:
994 gfs2_trans_end(sdp);
995 out_ipres:
996 if (da.nr_blocks)
997 gfs2_inplace_release(dip);
998 out_gunlock_q:
999 if (da.nr_blocks)
1000 gfs2_quota_unlock(dip);
1001 out_gunlock:
1002 gfs2_dir_no_add(&da);
1003 gfs2_glock_dq(ghs + 1);
1004 out_child:
1005 gfs2_glock_dq(ghs);
1006 out_parent:
1007 gfs2_holder_uninit(ghs);
1008 gfs2_holder_uninit(ghs + 1);
1009 return error;
1010 }
1011
1012 /*
1013 * gfs2_unlink_ok - check to see that a inode is still in a directory
1014 * @dip: the directory
1015 * @name: the name of the file
1016 * @ip: the inode
1017 *
1018 * Assumes that the lock on (at least) @dip is held.
1019 *
1020 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1021 */
1022
1023 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1024 const struct gfs2_inode *ip)
1025 {
1026 int error;
1027
1028 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1029 return -EPERM;
1030
1031 if ((dip->i_inode.i_mode & S_ISVTX) &&
1032 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1033 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
1034 return -EPERM;
1035
1036 if (IS_APPEND(&dip->i_inode))
1037 return -EPERM;
1038
1039 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
1040 if (error)
1041 return error;
1042
1043 return gfs2_dir_check(&dip->i_inode, name, ip);
1044 }
1045
1046 /**
1047 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1048 * @dip: The parent directory
1049 * @name: The name of the entry in the parent directory
1050 * @inode: The inode to be removed
1051 *
1052 * Called with all the locks and in a transaction. This will only be
1053 * called for a directory after it has been checked to ensure it is empty.
1054 *
1055 * Returns: 0 on success, or an error
1056 */
1057
1058 static int gfs2_unlink_inode(struct gfs2_inode *dip,
1059 const struct dentry *dentry)
1060 {
1061 struct inode *inode = d_inode(dentry);
1062 struct gfs2_inode *ip = GFS2_I(inode);
1063 int error;
1064
1065 error = gfs2_dir_del(dip, dentry);
1066 if (error)
1067 return error;
1068
1069 ip->i_entries = 0;
1070 inode->i_ctime = current_time(inode);
1071 if (S_ISDIR(inode->i_mode))
1072 clear_nlink(inode);
1073 else
1074 drop_nlink(inode);
1075 mark_inode_dirty(inode);
1076 if (inode->i_nlink == 0)
1077 gfs2_unlink_di(inode);
1078 return 0;
1079 }
1080
1081
1082 /**
1083 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1084 * @dir: The inode of the directory containing the inode to unlink
1085 * @dentry: The file itself
1086 *
1087 * This routine uses the type of the inode as a flag to figure out
1088 * whether this is an unlink or an rmdir.
1089 *
1090 * Returns: errno
1091 */
1092
1093 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1094 {
1095 struct gfs2_inode *dip = GFS2_I(dir);
1096 struct gfs2_sbd *sdp = GFS2_SB(dir);
1097 struct inode *inode = d_inode(dentry);
1098 struct gfs2_inode *ip = GFS2_I(inode);
1099 struct gfs2_holder ghs[3];
1100 struct gfs2_rgrpd *rgd;
1101 int error;
1102
1103 error = gfs2_rindex_update(sdp);
1104 if (error)
1105 return error;
1106
1107 error = -EROFS;
1108
1109 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1110 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1111
1112 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1113 if (!rgd)
1114 goto out_inodes;
1115
1116 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1117
1118
1119 error = gfs2_glock_nq(ghs); /* parent */
1120 if (error)
1121 goto out_parent;
1122
1123 error = gfs2_glock_nq(ghs + 1); /* child */
1124 if (error)
1125 goto out_child;
1126
1127 error = -ENOENT;
1128 if (inode->i_nlink == 0)
1129 goto out_rgrp;
1130
1131 if (S_ISDIR(inode->i_mode)) {
1132 error = -ENOTEMPTY;
1133 if (ip->i_entries > 2 || inode->i_nlink > 2)
1134 goto out_rgrp;
1135 }
1136
1137 error = gfs2_glock_nq(ghs + 2); /* rgrp */
1138 if (error)
1139 goto out_rgrp;
1140
1141 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1142 if (error)
1143 goto out_gunlock;
1144
1145 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1146 if (error)
1147 goto out_end_trans;
1148
1149 error = gfs2_unlink_inode(dip, dentry);
1150
1151 out_end_trans:
1152 gfs2_trans_end(sdp);
1153 out_gunlock:
1154 gfs2_glock_dq(ghs + 2);
1155 out_rgrp:
1156 gfs2_glock_dq(ghs + 1);
1157 out_child:
1158 gfs2_glock_dq(ghs);
1159 out_parent:
1160 gfs2_holder_uninit(ghs + 2);
1161 out_inodes:
1162 gfs2_holder_uninit(ghs + 1);
1163 gfs2_holder_uninit(ghs);
1164 return error;
1165 }
1166
1167 /**
1168 * gfs2_symlink - Create a symlink
1169 * @dir: The directory to create the symlink in
1170 * @dentry: The dentry to put the symlink in
1171 * @symname: The thing which the link points to
1172 *
1173 * Returns: errno
1174 */
1175
1176 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1177 const char *symname)
1178 {
1179 struct gfs2_sbd *sdp = GFS2_SB(dir);
1180 unsigned int size;
1181
1182 size = strlen(symname);
1183 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
1184 return -ENAMETOOLONG;
1185
1186 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL);
1187 }
1188
1189 /**
1190 * gfs2_mkdir - Make a directory
1191 * @dir: The parent directory of the new one
1192 * @dentry: The dentry of the new directory
1193 * @mode: The mode of the new directory
1194 *
1195 * Returns: errno
1196 */
1197
1198 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1199 {
1200 struct gfs2_sbd *sdp = GFS2_SB(dir);
1201 unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
1202 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL);
1203 }
1204
1205 /**
1206 * gfs2_mknod - Make a special file
1207 * @dir: The directory in which the special file will reside
1208 * @dentry: The dentry of the special file
1209 * @mode: The mode of the special file
1210 * @dev: The device specification of the special file
1211 *
1212 */
1213
1214 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1215 dev_t dev)
1216 {
1217 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL);
1218 }
1219
1220 /**
1221 * gfs2_atomic_open - Atomically open a file
1222 * @dir: The directory
1223 * @dentry: The proposed new entry
1224 * @file: The proposed new struct file
1225 * @flags: open flags
1226 * @mode: File mode
1227 * @opened: Flag to say whether the file has been opened or not
1228 *
1229 * Returns: error code or 0 for success
1230 */
1231
1232 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1233 struct file *file, unsigned flags,
1234 umode_t mode, int *opened)
1235 {
1236 struct dentry *d;
1237 bool excl = !!(flags & O_EXCL);
1238
1239 if (!d_in_lookup(dentry))
1240 goto skip_lookup;
1241
1242 d = __gfs2_lookup(dir, dentry, file, opened);
1243 if (IS_ERR(d))
1244 return PTR_ERR(d);
1245 if (d != NULL)
1246 dentry = d;
1247 if (d_really_is_positive(dentry)) {
1248 if (!(*opened & FILE_OPENED))
1249 return finish_no_open(file, d);
1250 dput(d);
1251 return 0;
1252 }
1253
1254 BUG_ON(d != NULL);
1255
1256 skip_lookup:
1257 if (!(flags & O_CREAT))
1258 return -ENOENT;
1259
1260 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened);
1261 }
1262
1263 /*
1264 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1265 * @this: move this
1266 * @to: to here
1267 *
1268 * Follow @to back to the root and make sure we don't encounter @this
1269 * Assumes we already hold the rename lock.
1270 *
1271 * Returns: errno
1272 */
1273
1274 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1275 {
1276 struct inode *dir = &to->i_inode;
1277 struct super_block *sb = dir->i_sb;
1278 struct inode *tmp;
1279 int error = 0;
1280
1281 igrab(dir);
1282
1283 for (;;) {
1284 if (dir == &this->i_inode) {
1285 error = -EINVAL;
1286 break;
1287 }
1288 if (dir == d_inode(sb->s_root)) {
1289 error = 0;
1290 break;
1291 }
1292
1293 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1294 if (!tmp) {
1295 error = -ENOENT;
1296 break;
1297 }
1298 if (IS_ERR(tmp)) {
1299 error = PTR_ERR(tmp);
1300 break;
1301 }
1302
1303 iput(dir);
1304 dir = tmp;
1305 }
1306
1307 iput(dir);
1308
1309 return error;
1310 }
1311
1312 /**
1313 * update_moved_ino - Update an inode that's being moved
1314 * @ip: The inode being moved
1315 * @ndip: The parent directory of the new filename
1316 * @dir_rename: True of ip is a directory
1317 *
1318 * Returns: errno
1319 */
1320
1321 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1322 int dir_rename)
1323 {
1324 int error;
1325 struct buffer_head *dibh;
1326
1327 if (dir_rename)
1328 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1329
1330 error = gfs2_meta_inode_buffer(ip, &dibh);
1331 if (error)
1332 return error;
1333 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1334 gfs2_trans_add_meta(ip->i_gl, dibh);
1335 gfs2_dinode_out(ip, dibh->b_data);
1336 brelse(dibh);
1337 return 0;
1338 }
1339
1340
1341 /**
1342 * gfs2_rename - Rename a file
1343 * @odir: Parent directory of old file name
1344 * @odentry: The old dentry of the file
1345 * @ndir: Parent directory of new file name
1346 * @ndentry: The new dentry of the file
1347 *
1348 * Returns: errno
1349 */
1350
1351 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1352 struct inode *ndir, struct dentry *ndentry)
1353 {
1354 struct gfs2_inode *odip = GFS2_I(odir);
1355 struct gfs2_inode *ndip = GFS2_I(ndir);
1356 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1357 struct gfs2_inode *nip = NULL;
1358 struct gfs2_sbd *sdp = GFS2_SB(odir);
1359 struct gfs2_holder ghs[5], r_gh;
1360 struct gfs2_rgrpd *nrgd;
1361 unsigned int num_gh;
1362 int dir_rename = 0;
1363 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1364 unsigned int x;
1365 int error;
1366
1367 gfs2_holder_mark_uninitialized(&r_gh);
1368 if (d_really_is_positive(ndentry)) {
1369 nip = GFS2_I(d_inode(ndentry));
1370 if (ip == nip)
1371 return 0;
1372 }
1373
1374 error = gfs2_rindex_update(sdp);
1375 if (error)
1376 return error;
1377
1378 error = gfs2_rsqa_alloc(ndip);
1379 if (error)
1380 return error;
1381
1382 if (odip != ndip) {
1383 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1384 0, &r_gh);
1385 if (error)
1386 goto out;
1387
1388 if (S_ISDIR(ip->i_inode.i_mode)) {
1389 dir_rename = 1;
1390 /* don't move a directory into its subdir */
1391 error = gfs2_ok_to_move(ip, ndip);
1392 if (error)
1393 goto out_gunlock_r;
1394 }
1395 }
1396
1397 num_gh = 1;
1398 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1399 if (odip != ndip) {
1400 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1401 num_gh++;
1402 }
1403 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1404 num_gh++;
1405
1406 if (nip) {
1407 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1408 num_gh++;
1409 /* grab the resource lock for unlink flag twiddling
1410 * this is the case of the target file already existing
1411 * so we unlink before doing the rename
1412 */
1413 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1414 if (nrgd)
1415 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
1416 }
1417
1418 for (x = 0; x < num_gh; x++) {
1419 error = gfs2_glock_nq(ghs + x);
1420 if (error)
1421 goto out_gunlock;
1422 }
1423
1424 error = -ENOENT;
1425 if (ip->i_inode.i_nlink == 0)
1426 goto out_gunlock;
1427
1428 /* Check out the old directory */
1429
1430 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1431 if (error)
1432 goto out_gunlock;
1433
1434 /* Check out the new directory */
1435
1436 if (nip) {
1437 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1438 if (error)
1439 goto out_gunlock;
1440
1441 if (nip->i_inode.i_nlink == 0) {
1442 error = -EAGAIN;
1443 goto out_gunlock;
1444 }
1445
1446 if (S_ISDIR(nip->i_inode.i_mode)) {
1447 if (nip->i_entries < 2) {
1448 gfs2_consist_inode(nip);
1449 error = -EIO;
1450 goto out_gunlock;
1451 }
1452 if (nip->i_entries > 2) {
1453 error = -ENOTEMPTY;
1454 goto out_gunlock;
1455 }
1456 }
1457 } else {
1458 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1459 if (error)
1460 goto out_gunlock;
1461
1462 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1463 switch (error) {
1464 case -ENOENT:
1465 error = 0;
1466 break;
1467 case 0:
1468 error = -EEXIST;
1469 default:
1470 goto out_gunlock;
1471 };
1472
1473 if (odip != ndip) {
1474 if (!ndip->i_inode.i_nlink) {
1475 error = -ENOENT;
1476 goto out_gunlock;
1477 }
1478 if (ndip->i_entries == (u32)-1) {
1479 error = -EFBIG;
1480 goto out_gunlock;
1481 }
1482 if (S_ISDIR(ip->i_inode.i_mode) &&
1483 ndip->i_inode.i_nlink == (u32)-1) {
1484 error = -EMLINK;
1485 goto out_gunlock;
1486 }
1487 }
1488 }
1489
1490 /* Check out the dir to be renamed */
1491
1492 if (dir_rename) {
1493 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1494 if (error)
1495 goto out_gunlock;
1496 }
1497
1498 if (nip == NULL) {
1499 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1500 if (error)
1501 goto out_gunlock;
1502 }
1503
1504 if (da.nr_blocks) {
1505 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1506 error = gfs2_quota_lock_check(ndip, &ap);
1507 if (error)
1508 goto out_gunlock;
1509
1510 error = gfs2_inplace_reserve(ndip, &ap);
1511 if (error)
1512 goto out_gunlock_q;
1513
1514 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1515 4 * RES_LEAF + 4, 0);
1516 if (error)
1517 goto out_ipreserv;
1518 } else {
1519 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1520 5 * RES_LEAF + 4, 0);
1521 if (error)
1522 goto out_gunlock;
1523 }
1524
1525 /* Remove the target file, if it exists */
1526
1527 if (nip)
1528 error = gfs2_unlink_inode(ndip, ndentry);
1529
1530 error = update_moved_ino(ip, ndip, dir_rename);
1531 if (error)
1532 goto out_end_trans;
1533
1534 error = gfs2_dir_del(odip, odentry);
1535 if (error)
1536 goto out_end_trans;
1537
1538 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1539 if (error)
1540 goto out_end_trans;
1541
1542 out_end_trans:
1543 gfs2_trans_end(sdp);
1544 out_ipreserv:
1545 if (da.nr_blocks)
1546 gfs2_inplace_release(ndip);
1547 out_gunlock_q:
1548 if (da.nr_blocks)
1549 gfs2_quota_unlock(ndip);
1550 out_gunlock:
1551 gfs2_dir_no_add(&da);
1552 while (x--) {
1553 gfs2_glock_dq(ghs + x);
1554 gfs2_holder_uninit(ghs + x);
1555 }
1556 out_gunlock_r:
1557 if (gfs2_holder_initialized(&r_gh))
1558 gfs2_glock_dq_uninit(&r_gh);
1559 out:
1560 return error;
1561 }
1562
1563 /**
1564 * gfs2_exchange - exchange two files
1565 * @odir: Parent directory of old file name
1566 * @odentry: The old dentry of the file
1567 * @ndir: Parent directory of new file name
1568 * @ndentry: The new dentry of the file
1569 * @flags: The rename flags
1570 *
1571 * Returns: errno
1572 */
1573
1574 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1575 struct inode *ndir, struct dentry *ndentry,
1576 unsigned int flags)
1577 {
1578 struct gfs2_inode *odip = GFS2_I(odir);
1579 struct gfs2_inode *ndip = GFS2_I(ndir);
1580 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1581 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1582 struct gfs2_sbd *sdp = GFS2_SB(odir);
1583 struct gfs2_holder ghs[5], r_gh;
1584 unsigned int num_gh;
1585 unsigned int x;
1586 umode_t old_mode = oip->i_inode.i_mode;
1587 umode_t new_mode = nip->i_inode.i_mode;
1588 int error;
1589
1590 gfs2_holder_mark_uninitialized(&r_gh);
1591 error = gfs2_rindex_update(sdp);
1592 if (error)
1593 return error;
1594
1595 if (odip != ndip) {
1596 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1597 0, &r_gh);
1598 if (error)
1599 goto out;
1600
1601 if (S_ISDIR(old_mode)) {
1602 /* don't move a directory into its subdir */
1603 error = gfs2_ok_to_move(oip, ndip);
1604 if (error)
1605 goto out_gunlock_r;
1606 }
1607
1608 if (S_ISDIR(new_mode)) {
1609 /* don't move a directory into its subdir */
1610 error = gfs2_ok_to_move(nip, odip);
1611 if (error)
1612 goto out_gunlock_r;
1613 }
1614 }
1615
1616 num_gh = 1;
1617 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1618 if (odip != ndip) {
1619 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1620 num_gh++;
1621 }
1622 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1623 num_gh++;
1624
1625 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1626 num_gh++;
1627
1628 for (x = 0; x < num_gh; x++) {
1629 error = gfs2_glock_nq(ghs + x);
1630 if (error)
1631 goto out_gunlock;
1632 }
1633
1634 error = -ENOENT;
1635 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1636 goto out_gunlock;
1637
1638 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1639 if (error)
1640 goto out_gunlock;
1641 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1642 if (error)
1643 goto out_gunlock;
1644
1645 if (S_ISDIR(old_mode)) {
1646 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1647 if (error)
1648 goto out_gunlock;
1649 }
1650 if (S_ISDIR(new_mode)) {
1651 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1652 if (error)
1653 goto out_gunlock;
1654 }
1655 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1656 if (error)
1657 goto out_gunlock;
1658
1659 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1660 if (error)
1661 goto out_end_trans;
1662
1663 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1664 if (error)
1665 goto out_end_trans;
1666
1667 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1668 IF2DT(old_mode));
1669 if (error)
1670 goto out_end_trans;
1671
1672 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1673 IF2DT(new_mode));
1674 if (error)
1675 goto out_end_trans;
1676
1677 if (odip != ndip) {
1678 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1679 inc_nlink(&odip->i_inode);
1680 drop_nlink(&ndip->i_inode);
1681 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1682 inc_nlink(&ndip->i_inode);
1683 drop_nlink(&odip->i_inode);
1684 }
1685 }
1686 mark_inode_dirty(&ndip->i_inode);
1687 if (odip != ndip)
1688 mark_inode_dirty(&odip->i_inode);
1689
1690 out_end_trans:
1691 gfs2_trans_end(sdp);
1692 out_gunlock:
1693 while (x--) {
1694 gfs2_glock_dq(ghs + x);
1695 gfs2_holder_uninit(ghs + x);
1696 }
1697 out_gunlock_r:
1698 if (gfs2_holder_initialized(&r_gh))
1699 gfs2_glock_dq_uninit(&r_gh);
1700 out:
1701 return error;
1702 }
1703
1704 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1705 struct inode *ndir, struct dentry *ndentry,
1706 unsigned int flags)
1707 {
1708 flags &= ~RENAME_NOREPLACE;
1709
1710 if (flags & ~RENAME_EXCHANGE)
1711 return -EINVAL;
1712
1713 if (flags & RENAME_EXCHANGE)
1714 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1715
1716 return gfs2_rename(odir, odentry, ndir, ndentry);
1717 }
1718
1719 /**
1720 * gfs2_get_link - Follow a symbolic link
1721 * @dentry: The dentry of the link
1722 * @inode: The inode of the link
1723 * @done: destructor for return value
1724 *
1725 * This can handle symlinks of any size.
1726 *
1727 * Returns: 0 on success or error code
1728 */
1729
1730 static const char *gfs2_get_link(struct dentry *dentry,
1731 struct inode *inode,
1732 struct delayed_call *done)
1733 {
1734 struct gfs2_inode *ip = GFS2_I(inode);
1735 struct gfs2_holder i_gh;
1736 struct buffer_head *dibh;
1737 unsigned int size;
1738 char *buf;
1739 int error;
1740
1741 if (!dentry)
1742 return ERR_PTR(-ECHILD);
1743
1744 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1745 error = gfs2_glock_nq(&i_gh);
1746 if (error) {
1747 gfs2_holder_uninit(&i_gh);
1748 return ERR_PTR(error);
1749 }
1750
1751 size = (unsigned int)i_size_read(&ip->i_inode);
1752 if (size == 0) {
1753 gfs2_consist_inode(ip);
1754 buf = ERR_PTR(-EIO);
1755 goto out;
1756 }
1757
1758 error = gfs2_meta_inode_buffer(ip, &dibh);
1759 if (error) {
1760 buf = ERR_PTR(error);
1761 goto out;
1762 }
1763
1764 buf = kzalloc(size + 1, GFP_NOFS);
1765 if (!buf)
1766 buf = ERR_PTR(-ENOMEM);
1767 else
1768 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1769 brelse(dibh);
1770 out:
1771 gfs2_glock_dq_uninit(&i_gh);
1772 if (!IS_ERR(buf))
1773 set_delayed_call(done, kfree_link, buf);
1774 return buf;
1775 }
1776
1777 /**
1778 * gfs2_permission -
1779 * @inode: The inode
1780 * @mask: The mask to be tested
1781 * @flags: Indicates whether this is an RCU path walk or not
1782 *
1783 * This may be called from the VFS directly, or from within GFS2 with the
1784 * inode locked, so we look to see if the glock is already locked and only
1785 * lock the glock if its not already been done.
1786 *
1787 * Returns: errno
1788 */
1789
1790 int gfs2_permission(struct inode *inode, int mask)
1791 {
1792 struct gfs2_inode *ip;
1793 struct gfs2_holder i_gh;
1794 int error;
1795
1796 gfs2_holder_mark_uninitialized(&i_gh);
1797 ip = GFS2_I(inode);
1798 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1799 if (mask & MAY_NOT_BLOCK)
1800 return -ECHILD;
1801 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1802 if (error)
1803 return error;
1804 }
1805
1806 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1807 error = -EPERM;
1808 else
1809 error = generic_permission(inode, mask);
1810 if (gfs2_holder_initialized(&i_gh))
1811 gfs2_glock_dq_uninit(&i_gh);
1812
1813 return error;
1814 }
1815
1816 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1817 {
1818 setattr_copy(inode, attr);
1819 mark_inode_dirty(inode);
1820 return 0;
1821 }
1822
1823 /**
1824 * gfs2_setattr_simple -
1825 * @ip:
1826 * @attr:
1827 *
1828 * Returns: errno
1829 */
1830
1831 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1832 {
1833 int error;
1834
1835 if (current->journal_info)
1836 return __gfs2_setattr_simple(inode, attr);
1837
1838 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1839 if (error)
1840 return error;
1841
1842 error = __gfs2_setattr_simple(inode, attr);
1843 gfs2_trans_end(GFS2_SB(inode));
1844 return error;
1845 }
1846
1847 static int setattr_chown(struct inode *inode, struct iattr *attr)
1848 {
1849 struct gfs2_inode *ip = GFS2_I(inode);
1850 struct gfs2_sbd *sdp = GFS2_SB(inode);
1851 kuid_t ouid, nuid;
1852 kgid_t ogid, ngid;
1853 int error;
1854 struct gfs2_alloc_parms ap;
1855
1856 ouid = inode->i_uid;
1857 ogid = inode->i_gid;
1858 nuid = attr->ia_uid;
1859 ngid = attr->ia_gid;
1860
1861 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1862 ouid = nuid = NO_UID_QUOTA_CHANGE;
1863 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1864 ogid = ngid = NO_GID_QUOTA_CHANGE;
1865
1866 error = gfs2_rsqa_alloc(ip);
1867 if (error)
1868 goto out;
1869
1870 error = gfs2_rindex_update(sdp);
1871 if (error)
1872 goto out;
1873
1874 error = gfs2_quota_lock(ip, nuid, ngid);
1875 if (error)
1876 goto out;
1877
1878 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1879
1880 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1881 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1882 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1883 if (error)
1884 goto out_gunlock_q;
1885 }
1886
1887 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1888 if (error)
1889 goto out_gunlock_q;
1890
1891 error = gfs2_setattr_simple(inode, attr);
1892 if (error)
1893 goto out_end_trans;
1894
1895 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1896 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1897 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1898 gfs2_quota_change(ip, ap.target, nuid, ngid);
1899 }
1900
1901 out_end_trans:
1902 gfs2_trans_end(sdp);
1903 out_gunlock_q:
1904 gfs2_quota_unlock(ip);
1905 out:
1906 return error;
1907 }
1908
1909 /**
1910 * gfs2_setattr - Change attributes on an inode
1911 * @dentry: The dentry which is changing
1912 * @attr: The structure describing the change
1913 *
1914 * The VFS layer wants to change one or more of an inodes attributes. Write
1915 * that change out to disk.
1916 *
1917 * Returns: errno
1918 */
1919
1920 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1921 {
1922 struct inode *inode = d_inode(dentry);
1923 struct gfs2_inode *ip = GFS2_I(inode);
1924 struct gfs2_holder i_gh;
1925 int error;
1926
1927 error = gfs2_rsqa_alloc(ip);
1928 if (error)
1929 return error;
1930
1931 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1932 if (error)
1933 return error;
1934
1935 error = -EPERM;
1936 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1937 goto out;
1938
1939 error = setattr_prepare(dentry, attr);
1940 if (error)
1941 goto out;
1942
1943 if (attr->ia_valid & ATTR_SIZE)
1944 error = gfs2_setattr_size(inode, attr->ia_size);
1945 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1946 error = setattr_chown(inode, attr);
1947 else {
1948 error = gfs2_setattr_simple(inode, attr);
1949 if (!error && attr->ia_valid & ATTR_MODE)
1950 error = posix_acl_chmod(inode, inode->i_mode);
1951 }
1952
1953 out:
1954 if (!error)
1955 mark_inode_dirty(inode);
1956 gfs2_glock_dq_uninit(&i_gh);
1957 return error;
1958 }
1959
1960 /**
1961 * gfs2_getattr - Read out an inode's attributes
1962 * @mnt: The vfsmount the inode is being accessed from
1963 * @dentry: The dentry to stat
1964 * @stat: The inode's stats
1965 *
1966 * This may be called from the VFS directly, or from within GFS2 with the
1967 * inode locked, so we look to see if the glock is already locked and only
1968 * lock the glock if its not already been done. Note that its the NFS
1969 * readdirplus operation which causes this to be called (from filldir)
1970 * with the glock already held.
1971 *
1972 * Returns: errno
1973 */
1974
1975 static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
1976 struct kstat *stat)
1977 {
1978 struct inode *inode = d_inode(dentry);
1979 struct gfs2_inode *ip = GFS2_I(inode);
1980 struct gfs2_holder gh;
1981 int error;
1982
1983 gfs2_holder_mark_uninitialized(&gh);
1984 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1985 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1986 if (error)
1987 return error;
1988 }
1989
1990 generic_fillattr(inode, stat);
1991 if (gfs2_holder_initialized(&gh))
1992 gfs2_glock_dq_uninit(&gh);
1993
1994 return 0;
1995 }
1996
1997 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1998 u64 start, u64 len)
1999 {
2000 struct gfs2_inode *ip = GFS2_I(inode);
2001 struct gfs2_holder gh;
2002 int ret;
2003
2004 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
2005 if (ret)
2006 return ret;
2007
2008 inode_lock(inode);
2009
2010 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2011 if (ret)
2012 goto out;
2013
2014 if (gfs2_is_stuffed(ip)) {
2015 u64 phys = ip->i_no_addr << inode->i_blkbits;
2016 u64 size = i_size_read(inode);
2017 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
2018 FIEMAP_EXTENT_DATA_INLINE;
2019 phys += sizeof(struct gfs2_dinode);
2020 phys += start;
2021 if (start + len > size)
2022 len = size - start;
2023 if (start < size)
2024 ret = fiemap_fill_next_extent(fieinfo, start, phys,
2025 len, flags);
2026 if (ret == 1)
2027 ret = 0;
2028 } else {
2029 ret = __generic_block_fiemap(inode, fieinfo, start, len,
2030 gfs2_block_map);
2031 }
2032
2033 gfs2_glock_dq_uninit(&gh);
2034 out:
2035 inode_unlock(inode);
2036 return ret;
2037 }
2038
2039 const struct inode_operations gfs2_file_iops = {
2040 .permission = gfs2_permission,
2041 .setattr = gfs2_setattr,
2042 .getattr = gfs2_getattr,
2043 .listxattr = gfs2_listxattr,
2044 .fiemap = gfs2_fiemap,
2045 .get_acl = gfs2_get_acl,
2046 .set_acl = gfs2_set_acl,
2047 };
2048
2049 const struct inode_operations gfs2_dir_iops = {
2050 .create = gfs2_create,
2051 .lookup = gfs2_lookup,
2052 .link = gfs2_link,
2053 .unlink = gfs2_unlink,
2054 .symlink = gfs2_symlink,
2055 .mkdir = gfs2_mkdir,
2056 .rmdir = gfs2_unlink,
2057 .mknod = gfs2_mknod,
2058 .rename = gfs2_rename2,
2059 .permission = gfs2_permission,
2060 .setattr = gfs2_setattr,
2061 .getattr = gfs2_getattr,
2062 .listxattr = gfs2_listxattr,
2063 .fiemap = gfs2_fiemap,
2064 .get_acl = gfs2_get_acl,
2065 .set_acl = gfs2_set_acl,
2066 .atomic_open = gfs2_atomic_open,
2067 };
2068
2069 const struct inode_operations gfs2_symlink_iops = {
2070 .readlink = generic_readlink,
2071 .get_link = gfs2_get_link,
2072 .permission = gfs2_permission,
2073 .setattr = gfs2_setattr,
2074 .getattr = gfs2_getattr,
2075 .listxattr = gfs2_listxattr,
2076 .fiemap = gfs2_fiemap,
2077 };
2078
Linux with added FPC-III support