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userns,pidns: Verify the userns for new pid namespaces
[cris-mirror.git] / fs / gfs2 / inode.c
blobacca501f811045cd37980c490e9a1d2e674dcae8
1 /*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/namei.h>
15 #include <linux/mm.h>
16 #include <linux/cred.h>
17 #include <linux/xattr.h>
18 #include <linux/posix_acl.h>
19 #include <linux/gfs2_ondisk.h>
20 #include <linux/crc32.h>
21 #include <linux/fiemap.h>
22 #include <linux/security.h>
23 #include <linux/uaccess.h>
24
25 #include "gfs2.h"
26 #include "incore.h"
27 #include "acl.h"
28 #include "bmap.h"
29 #include "dir.h"
30 #include "xattr.h"
31 #include "glock.h"
32 #include "inode.h"
33 #include "meta_io.h"
34 #include "quota.h"
35 #include "rgrp.h"
36 #include "trans.h"
37 #include "util.h"
38 #include "super.h"
39 #include "glops.h"
40
41 static int iget_test(struct inode *inode, void *opaque)
42 {
43 u64 no_addr = *(u64 *)opaque;
44
45 return GFS2_I(inode)->i_no_addr == no_addr;
46 }
47
48 static int iget_set(struct inode *inode, void *opaque)
49 {
50 u64 no_addr = *(u64 *)opaque;
51
52 GFS2_I(inode)->i_no_addr = no_addr;
53 inode->i_ino = no_addr;
54 return 0;
55 }
56
57 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
58 {
59 struct inode *inode;
60
61 repeat:
62 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr);
63 if (!inode)
64 return inode;
65 if (is_bad_inode(inode)) {
66 iput(inode);
67 goto repeat;
68 }
69 return inode;
70 }
71
72 /**
73 * gfs2_set_iop - Sets inode operations
74 * @inode: The inode with correct i_mode filled in
75 *
76 * GFS2 lookup code fills in vfs inode contents based on info obtained
77 * from directory entry inside gfs2_inode_lookup().
78 */
79
80 static void gfs2_set_iop(struct inode *inode)
81 {
82 struct gfs2_sbd *sdp = GFS2_SB(inode);
83 umode_t mode = inode->i_mode;
84
85 if (S_ISREG(mode)) {
86 inode->i_op = &gfs2_file_iops;
87 if (gfs2_localflocks(sdp))
88 inode->i_fop = &gfs2_file_fops_nolock;
89 else
90 inode->i_fop = &gfs2_file_fops;
91 } else if (S_ISDIR(mode)) {
92 inode->i_op = &gfs2_dir_iops;
93 if (gfs2_localflocks(sdp))
94 inode->i_fop = &gfs2_dir_fops_nolock;
95 else
96 inode->i_fop = &gfs2_dir_fops;
97 } else if (S_ISLNK(mode)) {
98 inode->i_op = &gfs2_symlink_iops;
99 } else {
100 inode->i_op = &gfs2_file_iops;
101 init_special_inode(inode, inode->i_mode, inode->i_rdev);
102 }
103 }
104
105 /**
106 * gfs2_inode_lookup - Lookup an inode
107 * @sb: The super block
108 * @type: The type of the inode
109 * @no_addr: The inode number
110 * @no_formal_ino: The inode generation number
111 * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED;
112 * GFS2_BLKST_FREE do indicate not to verify)
113 *
114 * If @type is DT_UNKNOWN, the inode type is fetched from disk.
115 *
116 * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a
117 * placeholder because it doesn't otherwise make sense), the on-disk block type
118 * is verified to be @blktype.
119 *
120 * Returns: A VFS inode, or an error
121 */
122
123 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
124 u64 no_addr, u64 no_formal_ino,
125 unsigned int blktype)
126 {
127 struct inode *inode;
128 struct gfs2_inode *ip;
129 struct gfs2_glock *io_gl = NULL;
130 struct gfs2_holder i_gh;
131 int error;
132
133 gfs2_holder_mark_uninitialized(&i_gh);
134 inode = gfs2_iget(sb, no_addr);
135 if (!inode)
136 return ERR_PTR(-ENOMEM);
137
138 ip = GFS2_I(inode);
139
140 if (inode->i_state & I_NEW) {
141 struct gfs2_sbd *sdp = GFS2_SB(inode);
142 ip->i_no_formal_ino = no_formal_ino;
143
144 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
145 if (unlikely(error))
146 goto fail;
147 flush_delayed_work(&ip->i_gl->gl_work);
148 glock_set_object(ip->i_gl, ip);
149
150 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
151 if (unlikely(error))
152 goto fail_put;
153
154 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
155 /*
156 * The GL_SKIP flag indicates to skip reading the inode
157 * block. We read the inode with gfs2_inode_refresh
158 * after possibly checking the block type.
159 */
160 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
161 GL_SKIP, &i_gh);
162 if (error)
163 goto fail_put;
164
165 if (blktype != GFS2_BLKST_FREE) {
166 error = gfs2_check_blk_type(sdp, no_addr,
167 blktype);
168 if (error)
169 goto fail_put;
170 }
171 }
172
173 set_bit(GIF_INVALID, &ip->i_flags);
174 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
175 if (unlikely(error))
176 goto fail_put;
177 flush_delayed_work(&ip->i_iopen_gh.gh_gl->gl_work);
178 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
179 gfs2_glock_put(io_gl);
180 io_gl = NULL;
181
182 if (type == DT_UNKNOWN) {
183 /* Inode glock must be locked already */
184 error = gfs2_inode_refresh(GFS2_I(inode));
185 if (error)
186 goto fail_refresh;
187 } else {
188 inode->i_mode = DT2IF(type);
189 }
190
191 gfs2_set_iop(inode);
192
193 inode->i_atime.tv_sec = 0;
194 inode->i_atime.tv_nsec = 0;
195
196 unlock_new_inode(inode);
197 }
198
199 if (gfs2_holder_initialized(&i_gh))
200 gfs2_glock_dq_uninit(&i_gh);
201 return inode;
202
203 fail_refresh:
204 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
205 glock_set_object(ip->i_iopen_gh.gh_gl, NULL);
206 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
207 fail_put:
208 if (io_gl)
209 gfs2_glock_put(io_gl);
210 if (gfs2_holder_initialized(&i_gh))
211 gfs2_glock_dq_uninit(&i_gh);
212 glock_set_object(ip->i_gl, NULL);
213 fail:
214 iget_failed(inode);
215 return ERR_PTR(error);
216 }
217
218 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
219 u64 *no_formal_ino, unsigned int blktype)
220 {
221 struct super_block *sb = sdp->sd_vfs;
222 struct inode *inode;
223 int error;
224
225 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype);
226 if (IS_ERR(inode))
227 return inode;
228
229 /* Two extra checks for NFS only */
230 if (no_formal_ino) {
231 error = -ESTALE;
232 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
233 goto fail_iput;
234
235 error = -EIO;
236 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
237 goto fail_iput;
238 }
239 return inode;
240
241 fail_iput:
242 iput(inode);
243 return ERR_PTR(error);
244 }
245
246
247 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
248 {
249 struct qstr qstr;
250 struct inode *inode;
251 gfs2_str2qstr(&qstr, name);
252 inode = gfs2_lookupi(dip, &qstr, 1);
253 /* gfs2_lookupi has inconsistent callers: vfs
254 * related routines expect NULL for no entry found,
255 * gfs2_lookup_simple callers expect ENOENT
256 * and do not check for NULL.
257 */
258 if (inode == NULL)
259 return ERR_PTR(-ENOENT);
260 else
261 return inode;
262 }
263
264
265 /**
266 * gfs2_lookupi - Look up a filename in a directory and return its inode
267 * @d_gh: An initialized holder for the directory glock
268 * @name: The name of the inode to look for
269 * @is_root: If 1, ignore the caller's permissions
270 * @i_gh: An uninitialized holder for the new inode glock
271 *
272 * This can be called via the VFS filldir function when NFS is doing
273 * a readdirplus and the inode which its intending to stat isn't
274 * already in cache. In this case we must not take the directory glock
275 * again, since the readdir call will have already taken that lock.
276 *
277 * Returns: errno
278 */
279
280 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
281 int is_root)
282 {
283 struct super_block *sb = dir->i_sb;
284 struct gfs2_inode *dip = GFS2_I(dir);
285 struct gfs2_holder d_gh;
286 int error = 0;
287 struct inode *inode = NULL;
288
289 gfs2_holder_mark_uninitialized(&d_gh);
290 if (!name->len || name->len > GFS2_FNAMESIZE)
291 return ERR_PTR(-ENAMETOOLONG);
292
293 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
294 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
295 dir == d_inode(sb->s_root))) {
296 igrab(dir);
297 return dir;
298 }
299
300 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
301 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
302 if (error)
303 return ERR_PTR(error);
304 }
305
306 if (!is_root) {
307 error = gfs2_permission(dir, MAY_EXEC);
308 if (error)
309 goto out;
310 }
311
312 inode = gfs2_dir_search(dir, name, false);
313 if (IS_ERR(inode))
314 error = PTR_ERR(inode);
315 out:
316 if (gfs2_holder_initialized(&d_gh))
317 gfs2_glock_dq_uninit(&d_gh);
318 if (error == -ENOENT)
319 return NULL;
320 return inode ? inode : ERR_PTR(error);
321 }
322
323 /**
324 * create_ok - OK to create a new on-disk inode here?
325 * @dip: Directory in which dinode is to be created
326 * @name: Name of new dinode
327 * @mode:
328 *
329 * Returns: errno
330 */
331
332 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
333 umode_t mode)
334 {
335 int error;
336
337 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
338 if (error)
339 return error;
340
341 /* Don't create entries in an unlinked directory */
342 if (!dip->i_inode.i_nlink)
343 return -ENOENT;
344
345 if (dip->i_entries == (u32)-1)
346 return -EFBIG;
347 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
348 return -EMLINK;
349
350 return 0;
351 }
352
353 static void munge_mode_uid_gid(const struct gfs2_inode *dip,
354 struct inode *inode)
355 {
356 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
357 (dip->i_inode.i_mode & S_ISUID) &&
358 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
359 if (S_ISDIR(inode->i_mode))
360 inode->i_mode |= S_ISUID;
361 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
362 inode->i_mode &= ~07111;
363 inode->i_uid = dip->i_inode.i_uid;
364 } else
365 inode->i_uid = current_fsuid();
366
367 if (dip->i_inode.i_mode & S_ISGID) {
368 if (S_ISDIR(inode->i_mode))
369 inode->i_mode |= S_ISGID;
370 inode->i_gid = dip->i_inode.i_gid;
371 } else
372 inode->i_gid = current_fsgid();
373 }
374
375 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
376 {
377 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
378 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
379 int error;
380
381 error = gfs2_quota_lock_check(ip, &ap);
382 if (error)
383 goto out;
384
385 error = gfs2_inplace_reserve(ip, &ap);
386 if (error)
387 goto out_quota;
388
389 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
390 if (error)
391 goto out_ipreserv;
392
393 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
394 ip->i_no_formal_ino = ip->i_generation;
395 ip->i_inode.i_ino = ip->i_no_addr;
396 ip->i_goal = ip->i_no_addr;
397
398 gfs2_trans_end(sdp);
399
400 out_ipreserv:
401 gfs2_inplace_release(ip);
402 out_quota:
403 gfs2_quota_unlock(ip);
404 out:
405 return error;
406 }
407
408 static void gfs2_init_dir(struct buffer_head *dibh,
409 const struct gfs2_inode *parent)
410 {
411 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
412 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
413
414 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
415 dent->de_inum = di->di_num; /* already GFS2 endian */
416 dent->de_type = cpu_to_be16(DT_DIR);
417
418 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
419 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
420 gfs2_inum_out(parent, dent);
421 dent->de_type = cpu_to_be16(DT_DIR);
422
423 }
424
425 /**
426 * gfs2_init_xattr - Initialise an xattr block for a new inode
427 * @ip: The inode in question
428 *
429 * This sets up an empty xattr block for a new inode, ready to
430 * take any ACLs, LSM xattrs, etc.
431 */
432
433 static void gfs2_init_xattr(struct gfs2_inode *ip)
434 {
435 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
436 struct buffer_head *bh;
437 struct gfs2_ea_header *ea;
438
439 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
440 gfs2_trans_add_meta(ip->i_gl, bh);
441 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
442 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
443
444 ea = GFS2_EA_BH2FIRST(bh);
445 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
446 ea->ea_type = GFS2_EATYPE_UNUSED;
447 ea->ea_flags = GFS2_EAFLAG_LAST;
448
449 brelse(bh);
450 }
451
452 /**
453 * init_dinode - Fill in a new dinode structure
454 * @dip: The directory this inode is being created in
455 * @ip: The inode
456 * @symname: The symlink destination (if a symlink)
457 * @bhp: The buffer head (returned to caller)
458 *
459 */
460
461 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
462 const char *symname)
463 {
464 struct gfs2_dinode *di;
465 struct buffer_head *dibh;
466
467 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
468 gfs2_trans_add_meta(ip->i_gl, dibh);
469 di = (struct gfs2_dinode *)dibh->b_data;
470 gfs2_dinode_out(ip, di);
471
472 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
473 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
474 di->__pad1 = 0;
475 di->__pad2 = 0;
476 di->__pad3 = 0;
477 memset(&di->__pad4, 0, sizeof(di->__pad4));
478 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
479 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
480
481 switch(ip->i_inode.i_mode & S_IFMT) {
482 case S_IFDIR:
483 gfs2_init_dir(dibh, dip);
484 break;
485 case S_IFLNK:
486 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
487 break;
488 }
489
490 set_buffer_uptodate(dibh);
491 brelse(dibh);
492 }
493
494 /**
495 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
496 * @dip: The directory we are linking into
497 * @da: The dir add information
498 * @nr_inodes: The number of inodes involved
499 *
500 * This calculate the number of blocks we need to reserve in a
501 * transaction to link @nr_inodes into a directory. In most cases
502 * @nr_inodes will be 2 (the directory plus the inode being linked in)
503 * but in case of rename, 4 may be required.
504 *
505 * Returns: Number of blocks
506 */
507
508 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
509 const struct gfs2_diradd *da,
510 unsigned nr_inodes)
511 {
512 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
513 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
514 }
515
516 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
517 struct gfs2_inode *ip, struct gfs2_diradd *da)
518 {
519 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
520 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
521 int error;
522
523 if (da->nr_blocks) {
524 error = gfs2_quota_lock_check(dip, &ap);
525 if (error)
526 goto fail_quota_locks;
527
528 error = gfs2_inplace_reserve(dip, &ap);
529 if (error)
530 goto fail_quota_locks;
531
532 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
533 if (error)
534 goto fail_ipreserv;
535 } else {
536 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
537 if (error)
538 goto fail_quota_locks;
539 }
540
541 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
542
543 gfs2_trans_end(sdp);
544 fail_ipreserv:
545 gfs2_inplace_release(dip);
546 fail_quota_locks:
547 gfs2_quota_unlock(dip);
548 return error;
549 }
550
551 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
552 void *fs_info)
553 {
554 const struct xattr *xattr;
555 int err = 0;
556
557 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
558 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
559 xattr->value_len, 0,
560 GFS2_EATYPE_SECURITY);
561 if (err < 0)
562 break;
563 }
564 return err;
565 }
566
567 /**
568 * gfs2_create_inode - Create a new inode
569 * @dir: The parent directory
570 * @dentry: The new dentry
571 * @file: If non-NULL, the file which is being opened
572 * @mode: The permissions on the new inode
573 * @dev: For device nodes, this is the device number
574 * @symname: For symlinks, this is the link destination
575 * @size: The initial size of the inode (ignored for directories)
576 *
577 * Returns: 0 on success, or error code
578 */
579
580 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
581 struct file *file,
582 umode_t mode, dev_t dev, const char *symname,
583 unsigned int size, int excl, int *opened)
584 {
585 const struct qstr *name = &dentry->d_name;
586 struct posix_acl *default_acl, *acl;
587 struct gfs2_holder ghs[2];
588 struct inode *inode = NULL;
589 struct gfs2_inode *dip = GFS2_I(dir), *ip;
590 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
591 struct gfs2_glock *io_gl = NULL;
592 int error, free_vfs_inode = 1;
593 u32 aflags = 0;
594 unsigned blocks = 1;
595 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
596
597 if (!name->len || name->len > GFS2_FNAMESIZE)
598 return -ENAMETOOLONG;
599
600 error = gfs2_rsqa_alloc(dip);
601 if (error)
602 return error;
603
604 error = gfs2_rindex_update(sdp);
605 if (error)
606 return error;
607
608 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
609 if (error)
610 goto fail;
611 gfs2_holder_mark_uninitialized(ghs + 1);
612
613 error = create_ok(dip, name, mode);
614 if (error)
615 goto fail_gunlock;
616
617 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
618 error = PTR_ERR(inode);
619 if (!IS_ERR(inode)) {
620 if (S_ISDIR(inode->i_mode)) {
621 iput(inode);
622 inode = ERR_PTR(-EISDIR);
623 goto fail_gunlock;
624 }
625 d_instantiate(dentry, inode);
626 error = 0;
627 if (file) {
628 if (S_ISREG(inode->i_mode))
629 error = finish_open(file, dentry, gfs2_open_common, opened);
630 else
631 error = finish_no_open(file, NULL);
632 }
633 gfs2_glock_dq_uninit(ghs);
634 return error;
635 } else if (error != -ENOENT) {
636 goto fail_gunlock;
637 }
638
639 error = gfs2_diradd_alloc_required(dir, name, &da);
640 if (error < 0)
641 goto fail_gunlock;
642
643 inode = new_inode(sdp->sd_vfs);
644 error = -ENOMEM;
645 if (!inode)
646 goto fail_gunlock;
647
648 error = posix_acl_create(dir, &mode, &default_acl, &acl);
649 if (error)
650 goto fail_gunlock;
651
652 ip = GFS2_I(inode);
653 error = gfs2_rsqa_alloc(ip);
654 if (error)
655 goto fail_free_acls;
656
657 inode->i_mode = mode;
658 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
659 inode->i_rdev = dev;
660 inode->i_size = size;
661 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
662 gfs2_set_inode_blocks(inode, 1);
663 munge_mode_uid_gid(dip, inode);
664 check_and_update_goal(dip);
665 ip->i_goal = dip->i_goal;
666 ip->i_diskflags = 0;
667 ip->i_eattr = 0;
668 ip->i_height = 0;
669 ip->i_depth = 0;
670 ip->i_entries = 0;
671 ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */
672
673 switch(mode & S_IFMT) {
674 case S_IFREG:
675 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
676 gfs2_tune_get(sdp, gt_new_files_jdata))
677 ip->i_diskflags |= GFS2_DIF_JDATA;
678 gfs2_set_aops(inode);
679 break;
680 case S_IFDIR:
681 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
682 ip->i_diskflags |= GFS2_DIF_JDATA;
683 ip->i_entries = 2;
684 break;
685 }
686
687 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
688 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
689 ip->i_diskflags |= GFS2_DIF_SYSTEM;
690
691 gfs2_set_inode_flags(inode);
692
693 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
694 (dip->i_diskflags & GFS2_DIF_TOPDIR))
695 aflags |= GFS2_AF_ORLOV;
696
697 if (default_acl || acl)
698 blocks++;
699
700 error = alloc_dinode(ip, aflags, &blocks);
701 if (error)
702 goto fail_free_inode;
703
704 gfs2_set_inode_blocks(inode, blocks);
705
706 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
707 if (error)
708 goto fail_free_inode;
709
710 glock_set_object(ip->i_gl, ip);
711 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
712 if (error)
713 goto fail_free_inode;
714
715 error = gfs2_trans_begin(sdp, blocks, 0);
716 if (error)
717 goto fail_gunlock2;
718
719 if (blocks > 1) {
720 ip->i_eattr = ip->i_no_addr + 1;
721 gfs2_init_xattr(ip);
722 }
723 init_dinode(dip, ip, symname);
724 gfs2_trans_end(sdp);
725
726 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
727 if (error)
728 goto fail_gunlock2;
729
730 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
731
732 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
733 if (error)
734 goto fail_gunlock2;
735
736 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
737 gfs2_glock_put(io_gl);
738 gfs2_set_iop(inode);
739 insert_inode_hash(inode);
740
741 free_vfs_inode = 0; /* After this point, the inode is no longer
742 considered free. Any failures need to undo
743 the gfs2 structures. */
744 if (default_acl) {
745 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
746 posix_acl_release(default_acl);
747 }
748 if (acl) {
749 if (!error)
750 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
751 posix_acl_release(acl);
752 }
753
754 if (error)
755 goto fail_gunlock3;
756
757 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
758 &gfs2_initxattrs, NULL);
759 if (error)
760 goto fail_gunlock3;
761
762 error = link_dinode(dip, name, ip, &da);
763 if (error)
764 goto fail_gunlock3;
765
766 mark_inode_dirty(inode);
767 d_instantiate(dentry, inode);
768 if (file) {
769 *opened |= FILE_CREATED;
770 error = finish_open(file, dentry, gfs2_open_common, opened);
771 }
772 gfs2_glock_dq_uninit(ghs);
773 gfs2_glock_dq_uninit(ghs + 1);
774 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
775 return error;
776
777 fail_gunlock3:
778 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
779 gfs2_glock_put(io_gl);
780 fail_gunlock2:
781 if (io_gl)
782 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
783 fail_free_inode:
784 if (ip->i_gl)
785 gfs2_glock_put(ip->i_gl);
786 gfs2_rsqa_delete(ip, NULL);
787 fail_free_acls:
788 if (default_acl)
789 posix_acl_release(default_acl);
790 if (acl)
791 posix_acl_release(acl);
792 fail_gunlock:
793 gfs2_dir_no_add(&da);
794 gfs2_glock_dq_uninit(ghs);
795 if (inode && !IS_ERR(inode)) {
796 clear_nlink(inode);
797 if (!free_vfs_inode)
798 mark_inode_dirty(inode);
799 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
800 &GFS2_I(inode)->i_flags);
801 iput(inode);
802 }
803 if (gfs2_holder_initialized(ghs + 1))
804 gfs2_glock_dq_uninit(ghs + 1);
805 fail:
806 return error;
807 }
808
809 /**
810 * gfs2_create - Create a file
811 * @dir: The directory in which to create the file
812 * @dentry: The dentry of the new file
813 * @mode: The mode of the new file
814 *
815 * Returns: errno
816 */
817
818 static int gfs2_create(struct inode *dir, struct dentry *dentry,
819 umode_t mode, bool excl)
820 {
821 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL);
822 }
823
824 /**
825 * __gfs2_lookup - Look up a filename in a directory and return its inode
826 * @dir: The directory inode
827 * @dentry: The dentry of the new inode
828 * @file: File to be opened
829 * @opened: atomic_open flags
830 *
831 *
832 * Returns: errno
833 */
834
835 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
836 struct file *file, int *opened)
837 {
838 struct inode *inode;
839 struct dentry *d;
840 struct gfs2_holder gh;
841 struct gfs2_glock *gl;
842 int error;
843
844 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
845 if (inode == NULL) {
846 d_add(dentry, NULL);
847 return NULL;
848 }
849 if (IS_ERR(inode))
850 return ERR_CAST(inode);
851
852 gl = GFS2_I(inode)->i_gl;
853 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
854 if (error) {
855 iput(inode);
856 return ERR_PTR(error);
857 }
858
859 d = d_splice_alias(inode, dentry);
860 if (IS_ERR(d)) {
861 gfs2_glock_dq_uninit(&gh);
862 return d;
863 }
864 if (file && S_ISREG(inode->i_mode))
865 error = finish_open(file, dentry, gfs2_open_common, opened);
866
867 gfs2_glock_dq_uninit(&gh);
868 if (error) {
869 dput(d);
870 return ERR_PTR(error);
871 }
872 return d;
873 }
874
875 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
876 unsigned flags)
877 {
878 return __gfs2_lookup(dir, dentry, NULL, NULL);
879 }
880
881 /**
882 * gfs2_link - Link to a file
883 * @old_dentry: The inode to link
884 * @dir: Add link to this directory
885 * @dentry: The name of the link
886 *
887 * Link the inode in "old_dentry" into the directory "dir" with the
888 * name in "dentry".
889 *
890 * Returns: errno
891 */
892
893 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
894 struct dentry *dentry)
895 {
896 struct gfs2_inode *dip = GFS2_I(dir);
897 struct gfs2_sbd *sdp = GFS2_SB(dir);
898 struct inode *inode = d_inode(old_dentry);
899 struct gfs2_inode *ip = GFS2_I(inode);
900 struct gfs2_holder ghs[2];
901 struct buffer_head *dibh;
902 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
903 int error;
904
905 if (S_ISDIR(inode->i_mode))
906 return -EPERM;
907
908 error = gfs2_rsqa_alloc(dip);
909 if (error)
910 return error;
911
912 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
913 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
914
915 error = gfs2_glock_nq(ghs); /* parent */
916 if (error)
917 goto out_parent;
918
919 error = gfs2_glock_nq(ghs + 1); /* child */
920 if (error)
921 goto out_child;
922
923 error = -ENOENT;
924 if (inode->i_nlink == 0)
925 goto out_gunlock;
926
927 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
928 if (error)
929 goto out_gunlock;
930
931 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
932 switch (error) {
933 case -ENOENT:
934 break;
935 case 0:
936 error = -EEXIST;
937 default:
938 goto out_gunlock;
939 }
940
941 error = -EINVAL;
942 if (!dip->i_inode.i_nlink)
943 goto out_gunlock;
944 error = -EFBIG;
945 if (dip->i_entries == (u32)-1)
946 goto out_gunlock;
947 error = -EPERM;
948 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
949 goto out_gunlock;
950 error = -EINVAL;
951 if (!ip->i_inode.i_nlink)
952 goto out_gunlock;
953 error = -EMLINK;
954 if (ip->i_inode.i_nlink == (u32)-1)
955 goto out_gunlock;
956
957 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
958 if (error < 0)
959 goto out_gunlock;
960
961 if (da.nr_blocks) {
962 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
963 error = gfs2_quota_lock_check(dip, &ap);
964 if (error)
965 goto out_gunlock;
966
967 error = gfs2_inplace_reserve(dip, &ap);
968 if (error)
969 goto out_gunlock_q;
970
971 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
972 if (error)
973 goto out_ipres;
974 } else {
975 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
976 if (error)
977 goto out_ipres;
978 }
979
980 error = gfs2_meta_inode_buffer(ip, &dibh);
981 if (error)
982 goto out_end_trans;
983
984 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
985 if (error)
986 goto out_brelse;
987
988 gfs2_trans_add_meta(ip->i_gl, dibh);
989 inc_nlink(&ip->i_inode);
990 ip->i_inode.i_ctime = current_time(&ip->i_inode);
991 ihold(inode);
992 d_instantiate(dentry, inode);
993 mark_inode_dirty(inode);
994
995 out_brelse:
996 brelse(dibh);
997 out_end_trans:
998 gfs2_trans_end(sdp);
999 out_ipres:
1000 if (da.nr_blocks)
1001 gfs2_inplace_release(dip);
1002 out_gunlock_q:
1003 if (da.nr_blocks)
1004 gfs2_quota_unlock(dip);
1005 out_gunlock:
1006 gfs2_dir_no_add(&da);
1007 gfs2_glock_dq(ghs + 1);
1008 out_child:
1009 gfs2_glock_dq(ghs);
1010 out_parent:
1011 gfs2_holder_uninit(ghs);
1012 gfs2_holder_uninit(ghs + 1);
1013 return error;
1014 }
1015
1016 /*
1017 * gfs2_unlink_ok - check to see that a inode is still in a directory
1018 * @dip: the directory
1019 * @name: the name of the file
1020 * @ip: the inode
1021 *
1022 * Assumes that the lock on (at least) @dip is held.
1023 *
1024 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1025 */
1026
1027 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1028 const struct gfs2_inode *ip)
1029 {
1030 int error;
1031
1032 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1033 return -EPERM;
1034
1035 if ((dip->i_inode.i_mode & S_ISVTX) &&
1036 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1037 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
1038 return -EPERM;
1039
1040 if (IS_APPEND(&dip->i_inode))
1041 return -EPERM;
1042
1043 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
1044 if (error)
1045 return error;
1046
1047 return gfs2_dir_check(&dip->i_inode, name, ip);
1048 }
1049
1050 /**
1051 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1052 * @dip: The parent directory
1053 * @name: The name of the entry in the parent directory
1054 * @inode: The inode to be removed
1055 *
1056 * Called with all the locks and in a transaction. This will only be
1057 * called for a directory after it has been checked to ensure it is empty.
1058 *
1059 * Returns: 0 on success, or an error
1060 */
1061
1062 static int gfs2_unlink_inode(struct gfs2_inode *dip,
1063 const struct dentry *dentry)
1064 {
1065 struct inode *inode = d_inode(dentry);
1066 struct gfs2_inode *ip = GFS2_I(inode);
1067 int error;
1068
1069 error = gfs2_dir_del(dip, dentry);
1070 if (error)
1071 return error;
1072
1073 ip->i_entries = 0;
1074 inode->i_ctime = current_time(inode);
1075 if (S_ISDIR(inode->i_mode))
1076 clear_nlink(inode);
1077 else
1078 drop_nlink(inode);
1079 mark_inode_dirty(inode);
1080 if (inode->i_nlink == 0)
1081 gfs2_unlink_di(inode);
1082 return 0;
1083 }
1084
1085
1086 /**
1087 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1088 * @dir: The inode of the directory containing the inode to unlink
1089 * @dentry: The file itself
1090 *
1091 * This routine uses the type of the inode as a flag to figure out
1092 * whether this is an unlink or an rmdir.
1093 *
1094 * Returns: errno
1095 */
1096
1097 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1098 {
1099 struct gfs2_inode *dip = GFS2_I(dir);
1100 struct gfs2_sbd *sdp = GFS2_SB(dir);
1101 struct inode *inode = d_inode(dentry);
1102 struct gfs2_inode *ip = GFS2_I(inode);
1103 struct gfs2_holder ghs[3];
1104 struct gfs2_rgrpd *rgd;
1105 int error;
1106
1107 error = gfs2_rindex_update(sdp);
1108 if (error)
1109 return error;
1110
1111 error = -EROFS;
1112
1113 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1114 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1115
1116 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1117 if (!rgd)
1118 goto out_inodes;
1119
1120 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1121
1122
1123 error = gfs2_glock_nq(ghs); /* parent */
1124 if (error)
1125 goto out_parent;
1126
1127 error = gfs2_glock_nq(ghs + 1); /* child */
1128 if (error)
1129 goto out_child;
1130
1131 error = -ENOENT;
1132 if (inode->i_nlink == 0)
1133 goto out_rgrp;
1134
1135 if (S_ISDIR(inode->i_mode)) {
1136 error = -ENOTEMPTY;
1137 if (ip->i_entries > 2 || inode->i_nlink > 2)
1138 goto out_rgrp;
1139 }
1140
1141 error = gfs2_glock_nq(ghs + 2); /* rgrp */
1142 if (error)
1143 goto out_rgrp;
1144
1145 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1146 if (error)
1147 goto out_gunlock;
1148
1149 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1150 if (error)
1151 goto out_end_trans;
1152
1153 error = gfs2_unlink_inode(dip, dentry);
1154
1155 out_end_trans:
1156 gfs2_trans_end(sdp);
1157 out_gunlock:
1158 gfs2_glock_dq(ghs + 2);
1159 out_rgrp:
1160 gfs2_glock_dq(ghs + 1);
1161 out_child:
1162 gfs2_glock_dq(ghs);
1163 out_parent:
1164 gfs2_holder_uninit(ghs + 2);
1165 out_inodes:
1166 gfs2_holder_uninit(ghs + 1);
1167 gfs2_holder_uninit(ghs);
1168 return error;
1169 }
1170
1171 /**
1172 * gfs2_symlink - Create a symlink
1173 * @dir: The directory to create the symlink in
1174 * @dentry: The dentry to put the symlink in
1175 * @symname: The thing which the link points to
1176 *
1177 * Returns: errno
1178 */
1179
1180 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1181 const char *symname)
1182 {
1183 struct gfs2_sbd *sdp = GFS2_SB(dir);
1184 unsigned int size;
1185
1186 size = strlen(symname);
1187 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
1188 return -ENAMETOOLONG;
1189
1190 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL);
1191 }
1192
1193 /**
1194 * gfs2_mkdir - Make a directory
1195 * @dir: The parent directory of the new one
1196 * @dentry: The dentry of the new directory
1197 * @mode: The mode of the new directory
1198 *
1199 * Returns: errno
1200 */
1201
1202 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1203 {
1204 struct gfs2_sbd *sdp = GFS2_SB(dir);
1205 unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
1206 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL);
1207 }
1208
1209 /**
1210 * gfs2_mknod - Make a special file
1211 * @dir: The directory in which the special file will reside
1212 * @dentry: The dentry of the special file
1213 * @mode: The mode of the special file
1214 * @dev: The device specification of the special file
1215 *
1216 */
1217
1218 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1219 dev_t dev)
1220 {
1221 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL);
1222 }
1223
1224 /**
1225 * gfs2_atomic_open - Atomically open a file
1226 * @dir: The directory
1227 * @dentry: The proposed new entry
1228 * @file: The proposed new struct file
1229 * @flags: open flags
1230 * @mode: File mode
1231 * @opened: Flag to say whether the file has been opened or not
1232 *
1233 * Returns: error code or 0 for success
1234 */
1235
1236 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1237 struct file *file, unsigned flags,
1238 umode_t mode, int *opened)
1239 {
1240 struct dentry *d;
1241 bool excl = !!(flags & O_EXCL);
1242
1243 if (!d_in_lookup(dentry))
1244 goto skip_lookup;
1245
1246 d = __gfs2_lookup(dir, dentry, file, opened);
1247 if (IS_ERR(d))
1248 return PTR_ERR(d);
1249 if (d != NULL)
1250 dentry = d;
1251 if (d_really_is_positive(dentry)) {
1252 if (!(*opened & FILE_OPENED))
1253 return finish_no_open(file, d);
1254 dput(d);
1255 return 0;
1256 }
1257
1258 BUG_ON(d != NULL);
1259
1260 skip_lookup:
1261 if (!(flags & O_CREAT))
1262 return -ENOENT;
1263
1264 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened);
1265 }
1266
1267 /*
1268 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1269 * @this: move this
1270 * @to: to here
1271 *
1272 * Follow @to back to the root and make sure we don't encounter @this
1273 * Assumes we already hold the rename lock.
1274 *
1275 * Returns: errno
1276 */
1277
1278 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1279 {
1280 struct inode *dir = &to->i_inode;
1281 struct super_block *sb = dir->i_sb;
1282 struct inode *tmp;
1283 int error = 0;
1284
1285 igrab(dir);
1286
1287 for (;;) {
1288 if (dir == &this->i_inode) {
1289 error = -EINVAL;
1290 break;
1291 }
1292 if (dir == d_inode(sb->s_root)) {
1293 error = 0;
1294 break;
1295 }
1296
1297 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1298 if (!tmp) {
1299 error = -ENOENT;
1300 break;
1301 }
1302 if (IS_ERR(tmp)) {
1303 error = PTR_ERR(tmp);
1304 break;
1305 }
1306
1307 iput(dir);
1308 dir = tmp;
1309 }
1310
1311 iput(dir);
1312
1313 return error;
1314 }
1315
1316 /**
1317 * update_moved_ino - Update an inode that's being moved
1318 * @ip: The inode being moved
1319 * @ndip: The parent directory of the new filename
1320 * @dir_rename: True of ip is a directory
1321 *
1322 * Returns: errno
1323 */
1324
1325 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1326 int dir_rename)
1327 {
1328 int error;
1329 struct buffer_head *dibh;
1330
1331 if (dir_rename)
1332 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1333
1334 error = gfs2_meta_inode_buffer(ip, &dibh);
1335 if (error)
1336 return error;
1337 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1338 gfs2_trans_add_meta(ip->i_gl, dibh);
1339 gfs2_dinode_out(ip, dibh->b_data);
1340 brelse(dibh);
1341 return 0;
1342 }
1343
1344
1345 /**
1346 * gfs2_rename - Rename a file
1347 * @odir: Parent directory of old file name
1348 * @odentry: The old dentry of the file
1349 * @ndir: Parent directory of new file name
1350 * @ndentry: The new dentry of the file
1351 *
1352 * Returns: errno
1353 */
1354
1355 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1356 struct inode *ndir, struct dentry *ndentry)
1357 {
1358 struct gfs2_inode *odip = GFS2_I(odir);
1359 struct gfs2_inode *ndip = GFS2_I(ndir);
1360 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1361 struct gfs2_inode *nip = NULL;
1362 struct gfs2_sbd *sdp = GFS2_SB(odir);
1363 struct gfs2_holder ghs[5], r_gh;
1364 struct gfs2_rgrpd *nrgd;
1365 unsigned int num_gh;
1366 int dir_rename = 0;
1367 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1368 unsigned int x;
1369 int error;
1370
1371 gfs2_holder_mark_uninitialized(&r_gh);
1372 if (d_really_is_positive(ndentry)) {
1373 nip = GFS2_I(d_inode(ndentry));
1374 if (ip == nip)
1375 return 0;
1376 }
1377
1378 error = gfs2_rindex_update(sdp);
1379 if (error)
1380 return error;
1381
1382 error = gfs2_rsqa_alloc(ndip);
1383 if (error)
1384 return error;
1385
1386 if (odip != ndip) {
1387 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1388 0, &r_gh);
1389 if (error)
1390 goto out;
1391
1392 if (S_ISDIR(ip->i_inode.i_mode)) {
1393 dir_rename = 1;
1394 /* don't move a directory into its subdir */
1395 error = gfs2_ok_to_move(ip, ndip);
1396 if (error)
1397 goto out_gunlock_r;
1398 }
1399 }
1400
1401 num_gh = 1;
1402 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1403 if (odip != ndip) {
1404 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1405 num_gh++;
1406 }
1407 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1408 num_gh++;
1409
1410 if (nip) {
1411 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1412 num_gh++;
1413 /* grab the resource lock for unlink flag twiddling
1414 * this is the case of the target file already existing
1415 * so we unlink before doing the rename
1416 */
1417 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1418 if (nrgd)
1419 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
1420 }
1421
1422 for (x = 0; x < num_gh; x++) {
1423 error = gfs2_glock_nq(ghs + x);
1424 if (error)
1425 goto out_gunlock;
1426 }
1427
1428 error = -ENOENT;
1429 if (ip->i_inode.i_nlink == 0)
1430 goto out_gunlock;
1431
1432 /* Check out the old directory */
1433
1434 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1435 if (error)
1436 goto out_gunlock;
1437
1438 /* Check out the new directory */
1439
1440 if (nip) {
1441 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1442 if (error)
1443 goto out_gunlock;
1444
1445 if (nip->i_inode.i_nlink == 0) {
1446 error = -EAGAIN;
1447 goto out_gunlock;
1448 }
1449
1450 if (S_ISDIR(nip->i_inode.i_mode)) {
1451 if (nip->i_entries < 2) {
1452 gfs2_consist_inode(nip);
1453 error = -EIO;
1454 goto out_gunlock;
1455 }
1456 if (nip->i_entries > 2) {
1457 error = -ENOTEMPTY;
1458 goto out_gunlock;
1459 }
1460 }
1461 } else {
1462 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1463 if (error)
1464 goto out_gunlock;
1465
1466 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1467 switch (error) {
1468 case -ENOENT:
1469 error = 0;
1470 break;
1471 case 0:
1472 error = -EEXIST;
1473 default:
1474 goto out_gunlock;
1475 };
1476
1477 if (odip != ndip) {
1478 if (!ndip->i_inode.i_nlink) {
1479 error = -ENOENT;
1480 goto out_gunlock;
1481 }
1482 if (ndip->i_entries == (u32)-1) {
1483 error = -EFBIG;
1484 goto out_gunlock;
1485 }
1486 if (S_ISDIR(ip->i_inode.i_mode) &&
1487 ndip->i_inode.i_nlink == (u32)-1) {
1488 error = -EMLINK;
1489 goto out_gunlock;
1490 }
1491 }
1492 }
1493
1494 /* Check out the dir to be renamed */
1495
1496 if (dir_rename) {
1497 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1498 if (error)
1499 goto out_gunlock;
1500 }
1501
1502 if (nip == NULL) {
1503 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1504 if (error)
1505 goto out_gunlock;
1506 }
1507
1508 if (da.nr_blocks) {
1509 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1510 error = gfs2_quota_lock_check(ndip, &ap);
1511 if (error)
1512 goto out_gunlock;
1513
1514 error = gfs2_inplace_reserve(ndip, &ap);
1515 if (error)
1516 goto out_gunlock_q;
1517
1518 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1519 4 * RES_LEAF + 4, 0);
1520 if (error)
1521 goto out_ipreserv;
1522 } else {
1523 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1524 5 * RES_LEAF + 4, 0);
1525 if (error)
1526 goto out_gunlock;
1527 }
1528
1529 /* Remove the target file, if it exists */
1530
1531 if (nip)
1532 error = gfs2_unlink_inode(ndip, ndentry);
1533
1534 error = update_moved_ino(ip, ndip, dir_rename);
1535 if (error)
1536 goto out_end_trans;
1537
1538 error = gfs2_dir_del(odip, odentry);
1539 if (error)
1540 goto out_end_trans;
1541
1542 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1543 if (error)
1544 goto out_end_trans;
1545
1546 out_end_trans:
1547 gfs2_trans_end(sdp);
1548 out_ipreserv:
1549 if (da.nr_blocks)
1550 gfs2_inplace_release(ndip);
1551 out_gunlock_q:
1552 if (da.nr_blocks)
1553 gfs2_quota_unlock(ndip);
1554 out_gunlock:
1555 gfs2_dir_no_add(&da);
1556 while (x--) {
1557 gfs2_glock_dq(ghs + x);
1558 gfs2_holder_uninit(ghs + x);
1559 }
1560 out_gunlock_r:
1561 if (gfs2_holder_initialized(&r_gh))
1562 gfs2_glock_dq_uninit(&r_gh);
1563 out:
1564 return error;
1565 }
1566
1567 /**
1568 * gfs2_exchange - exchange two files
1569 * @odir: Parent directory of old file name
1570 * @odentry: The old dentry of the file
1571 * @ndir: Parent directory of new file name
1572 * @ndentry: The new dentry of the file
1573 * @flags: The rename flags
1574 *
1575 * Returns: errno
1576 */
1577
1578 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1579 struct inode *ndir, struct dentry *ndentry,
1580 unsigned int flags)
1581 {
1582 struct gfs2_inode *odip = GFS2_I(odir);
1583 struct gfs2_inode *ndip = GFS2_I(ndir);
1584 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1585 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1586 struct gfs2_sbd *sdp = GFS2_SB(odir);
1587 struct gfs2_holder ghs[5], r_gh;
1588 unsigned int num_gh;
1589 unsigned int x;
1590 umode_t old_mode = oip->i_inode.i_mode;
1591 umode_t new_mode = nip->i_inode.i_mode;
1592 int error;
1593
1594 gfs2_holder_mark_uninitialized(&r_gh);
1595 error = gfs2_rindex_update(sdp);
1596 if (error)
1597 return error;
1598
1599 if (odip != ndip) {
1600 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1601 0, &r_gh);
1602 if (error)
1603 goto out;
1604
1605 if (S_ISDIR(old_mode)) {
1606 /* don't move a directory into its subdir */
1607 error = gfs2_ok_to_move(oip, ndip);
1608 if (error)
1609 goto out_gunlock_r;
1610 }
1611
1612 if (S_ISDIR(new_mode)) {
1613 /* don't move a directory into its subdir */
1614 error = gfs2_ok_to_move(nip, odip);
1615 if (error)
1616 goto out_gunlock_r;
1617 }
1618 }
1619
1620 num_gh = 1;
1621 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1622 if (odip != ndip) {
1623 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1624 num_gh++;
1625 }
1626 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1627 num_gh++;
1628
1629 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1630 num_gh++;
1631
1632 for (x = 0; x < num_gh; x++) {
1633 error = gfs2_glock_nq(ghs + x);
1634 if (error)
1635 goto out_gunlock;
1636 }
1637
1638 error = -ENOENT;
1639 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1640 goto out_gunlock;
1641
1642 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1643 if (error)
1644 goto out_gunlock;
1645 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1646 if (error)
1647 goto out_gunlock;
1648
1649 if (S_ISDIR(old_mode)) {
1650 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1651 if (error)
1652 goto out_gunlock;
1653 }
1654 if (S_ISDIR(new_mode)) {
1655 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1656 if (error)
1657 goto out_gunlock;
1658 }
1659 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1660 if (error)
1661 goto out_gunlock;
1662
1663 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1664 if (error)
1665 goto out_end_trans;
1666
1667 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1668 if (error)
1669 goto out_end_trans;
1670
1671 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1672 IF2DT(old_mode));
1673 if (error)
1674 goto out_end_trans;
1675
1676 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1677 IF2DT(new_mode));
1678 if (error)
1679 goto out_end_trans;
1680
1681 if (odip != ndip) {
1682 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1683 inc_nlink(&odip->i_inode);
1684 drop_nlink(&ndip->i_inode);
1685 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1686 inc_nlink(&ndip->i_inode);
1687 drop_nlink(&odip->i_inode);
1688 }
1689 }
1690 mark_inode_dirty(&ndip->i_inode);
1691 if (odip != ndip)
1692 mark_inode_dirty(&odip->i_inode);
1693
1694 out_end_trans:
1695 gfs2_trans_end(sdp);
1696 out_gunlock:
1697 while (x--) {
1698 gfs2_glock_dq(ghs + x);
1699 gfs2_holder_uninit(ghs + x);
1700 }
1701 out_gunlock_r:
1702 if (gfs2_holder_initialized(&r_gh))
1703 gfs2_glock_dq_uninit(&r_gh);
1704 out:
1705 return error;
1706 }
1707
1708 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1709 struct inode *ndir, struct dentry *ndentry,
1710 unsigned int flags)
1711 {
1712 flags &= ~RENAME_NOREPLACE;
1713
1714 if (flags & ~RENAME_EXCHANGE)
1715 return -EINVAL;
1716
1717 if (flags & RENAME_EXCHANGE)
1718 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1719
1720 return gfs2_rename(odir, odentry, ndir, ndentry);
1721 }
1722
1723 /**
1724 * gfs2_get_link - Follow a symbolic link
1725 * @dentry: The dentry of the link
1726 * @inode: The inode of the link
1727 * @done: destructor for return value
1728 *
1729 * This can handle symlinks of any size.
1730 *
1731 * Returns: 0 on success or error code
1732 */
1733
1734 static const char *gfs2_get_link(struct dentry *dentry,
1735 struct inode *inode,
1736 struct delayed_call *done)
1737 {
1738 struct gfs2_inode *ip = GFS2_I(inode);
1739 struct gfs2_holder i_gh;
1740 struct buffer_head *dibh;
1741 unsigned int size;
1742 char *buf;
1743 int error;
1744
1745 if (!dentry)
1746 return ERR_PTR(-ECHILD);
1747
1748 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1749 error = gfs2_glock_nq(&i_gh);
1750 if (error) {
1751 gfs2_holder_uninit(&i_gh);
1752 return ERR_PTR(error);
1753 }
1754
1755 size = (unsigned int)i_size_read(&ip->i_inode);
1756 if (size == 0) {
1757 gfs2_consist_inode(ip);
1758 buf = ERR_PTR(-EIO);
1759 goto out;
1760 }
1761
1762 error = gfs2_meta_inode_buffer(ip, &dibh);
1763 if (error) {
1764 buf = ERR_PTR(error);
1765 goto out;
1766 }
1767
1768 buf = kzalloc(size + 1, GFP_NOFS);
1769 if (!buf)
1770 buf = ERR_PTR(-ENOMEM);
1771 else
1772 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1773 brelse(dibh);
1774 out:
1775 gfs2_glock_dq_uninit(&i_gh);
1776 if (!IS_ERR(buf))
1777 set_delayed_call(done, kfree_link, buf);
1778 return buf;
1779 }
1780
1781 /**
1782 * gfs2_permission -
1783 * @inode: The inode
1784 * @mask: The mask to be tested
1785 * @flags: Indicates whether this is an RCU path walk or not
1786 *
1787 * This may be called from the VFS directly, or from within GFS2 with the
1788 * inode locked, so we look to see if the glock is already locked and only
1789 * lock the glock if its not already been done.
1790 *
1791 * Returns: errno
1792 */
1793
1794 int gfs2_permission(struct inode *inode, int mask)
1795 {
1796 struct gfs2_inode *ip;
1797 struct gfs2_holder i_gh;
1798 int error;
1799
1800 gfs2_holder_mark_uninitialized(&i_gh);
1801 ip = GFS2_I(inode);
1802 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1803 if (mask & MAY_NOT_BLOCK)
1804 return -ECHILD;
1805 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1806 if (error)
1807 return error;
1808 }
1809
1810 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1811 error = -EPERM;
1812 else
1813 error = generic_permission(inode, mask);
1814 if (gfs2_holder_initialized(&i_gh))
1815 gfs2_glock_dq_uninit(&i_gh);
1816
1817 return error;
1818 }
1819
1820 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1821 {
1822 setattr_copy(inode, attr);
1823 mark_inode_dirty(inode);
1824 return 0;
1825 }
1826
1827 /**
1828 * gfs2_setattr_simple -
1829 * @ip:
1830 * @attr:
1831 *
1832 * Returns: errno
1833 */
1834
1835 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1836 {
1837 int error;
1838
1839 if (current->journal_info)
1840 return __gfs2_setattr_simple(inode, attr);
1841
1842 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1843 if (error)
1844 return error;
1845
1846 error = __gfs2_setattr_simple(inode, attr);
1847 gfs2_trans_end(GFS2_SB(inode));
1848 return error;
1849 }
1850
1851 static int setattr_chown(struct inode *inode, struct iattr *attr)
1852 {
1853 struct gfs2_inode *ip = GFS2_I(inode);
1854 struct gfs2_sbd *sdp = GFS2_SB(inode);
1855 kuid_t ouid, nuid;
1856 kgid_t ogid, ngid;
1857 int error;
1858 struct gfs2_alloc_parms ap;
1859
1860 ouid = inode->i_uid;
1861 ogid = inode->i_gid;
1862 nuid = attr->ia_uid;
1863 ngid = attr->ia_gid;
1864
1865 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1866 ouid = nuid = NO_UID_QUOTA_CHANGE;
1867 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1868 ogid = ngid = NO_GID_QUOTA_CHANGE;
1869
1870 error = gfs2_rsqa_alloc(ip);
1871 if (error)
1872 goto out;
1873
1874 error = gfs2_rindex_update(sdp);
1875 if (error)
1876 goto out;
1877
1878 error = gfs2_quota_lock(ip, nuid, ngid);
1879 if (error)
1880 goto out;
1881
1882 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1883
1884 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1885 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1886 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1887 if (error)
1888 goto out_gunlock_q;
1889 }
1890
1891 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1892 if (error)
1893 goto out_gunlock_q;
1894
1895 error = gfs2_setattr_simple(inode, attr);
1896 if (error)
1897 goto out_end_trans;
1898
1899 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1900 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1901 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1902 gfs2_quota_change(ip, ap.target, nuid, ngid);
1903 }
1904
1905 out_end_trans:
1906 gfs2_trans_end(sdp);
1907 out_gunlock_q:
1908 gfs2_quota_unlock(ip);
1909 out:
1910 return error;
1911 }
1912
1913 /**
1914 * gfs2_setattr - Change attributes on an inode
1915 * @dentry: The dentry which is changing
1916 * @attr: The structure describing the change
1917 *
1918 * The VFS layer wants to change one or more of an inodes attributes. Write
1919 * that change out to disk.
1920 *
1921 * Returns: errno
1922 */
1923
1924 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1925 {
1926 struct inode *inode = d_inode(dentry);
1927 struct gfs2_inode *ip = GFS2_I(inode);
1928 struct gfs2_holder i_gh;
1929 int error;
1930
1931 error = gfs2_rsqa_alloc(ip);
1932 if (error)
1933 return error;
1934
1935 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1936 if (error)
1937 return error;
1938
1939 error = -EPERM;
1940 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1941 goto out;
1942
1943 error = setattr_prepare(dentry, attr);
1944 if (error)
1945 goto out;
1946
1947 if (attr->ia_valid & ATTR_SIZE)
1948 error = gfs2_setattr_size(inode, attr->ia_size);
1949 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1950 error = setattr_chown(inode, attr);
1951 else {
1952 error = gfs2_setattr_simple(inode, attr);
1953 if (!error && attr->ia_valid & ATTR_MODE)
1954 error = posix_acl_chmod(inode, inode->i_mode);
1955 }
1956
1957 out:
1958 if (!error)
1959 mark_inode_dirty(inode);
1960 gfs2_glock_dq_uninit(&i_gh);
1961 return error;
1962 }
1963
1964 /**
1965 * gfs2_getattr - Read out an inode's attributes
1966 * @path: Object to query
1967 * @stat: The inode's stats
1968 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests
1969 * @flags: AT_STATX_xxx setting
1970 *
1971 * This may be called from the VFS directly, or from within GFS2 with the
1972 * inode locked, so we look to see if the glock is already locked and only
1973 * lock the glock if its not already been done. Note that its the NFS
1974 * readdirplus operation which causes this to be called (from filldir)
1975 * with the glock already held.
1976 *
1977 * Returns: errno
1978 */
1979
1980 static int gfs2_getattr(const struct path *path, struct kstat *stat,
1981 u32 request_mask, unsigned int flags)
1982 {
1983 struct inode *inode = d_inode(path->dentry);
1984 struct gfs2_inode *ip = GFS2_I(inode);
1985 struct gfs2_holder gh;
1986 int error;
1987
1988 gfs2_holder_mark_uninitialized(&gh);
1989 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1990 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1991 if (error)
1992 return error;
1993 }
1994
1995 generic_fillattr(inode, stat);
1996 if (gfs2_holder_initialized(&gh))
1997 gfs2_glock_dq_uninit(&gh);
1998
1999 return 0;
2000 }
2001
2002 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2003 u64 start, u64 len)
2004 {
2005 struct gfs2_inode *ip = GFS2_I(inode);
2006 struct gfs2_holder gh;
2007 int ret;
2008
2009 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
2010 if (ret)
2011 return ret;
2012
2013 inode_lock(inode);
2014
2015 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2016 if (ret)
2017 goto out;
2018
2019 if (gfs2_is_stuffed(ip)) {
2020 u64 phys = ip->i_no_addr << inode->i_blkbits;
2021 u64 size = i_size_read(inode);
2022 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
2023 FIEMAP_EXTENT_DATA_INLINE;
2024 phys += sizeof(struct gfs2_dinode);
2025 phys += start;
2026 if (start + len > size)
2027 len = size - start;
2028 if (start < size)
2029 ret = fiemap_fill_next_extent(fieinfo, start, phys,
2030 len, flags);
2031 if (ret == 1)
2032 ret = 0;
2033 } else {
2034 ret = __generic_block_fiemap(inode, fieinfo, start, len,
2035 gfs2_block_map);
2036 }
2037
2038 gfs2_glock_dq_uninit(&gh);
2039 out:
2040 inode_unlock(inode);
2041 return ret;
2042 }
2043
2044 const struct inode_operations gfs2_file_iops = {
2045 .permission = gfs2_permission,
2046 .setattr = gfs2_setattr,
2047 .getattr = gfs2_getattr,
2048 .listxattr = gfs2_listxattr,
2049 .fiemap = gfs2_fiemap,
2050 .get_acl = gfs2_get_acl,
2051 .set_acl = gfs2_set_acl,
2052 };
2053
2054 const struct inode_operations gfs2_dir_iops = {
2055 .create = gfs2_create,
2056 .lookup = gfs2_lookup,
2057 .link = gfs2_link,
2058 .unlink = gfs2_unlink,
2059 .symlink = gfs2_symlink,
2060 .mkdir = gfs2_mkdir,
2061 .rmdir = gfs2_unlink,
2062 .mknod = gfs2_mknod,
2063 .rename = gfs2_rename2,
2064 .permission = gfs2_permission,
2065 .setattr = gfs2_setattr,
2066 .getattr = gfs2_getattr,
2067 .listxattr = gfs2_listxattr,
2068 .fiemap = gfs2_fiemap,
2069 .get_acl = gfs2_get_acl,
2070 .set_acl = gfs2_set_acl,
2071 .atomic_open = gfs2_atomic_open,
2072 };
2073
2074 const struct inode_operations gfs2_symlink_iops = {
2075 .get_link = gfs2_get_link,
2076 .permission = gfs2_permission,
2077 .setattr = gfs2_setattr,
2078 .getattr = gfs2_getattr,
2079 .listxattr = gfs2_listxattr,
2080 .fiemap = gfs2_fiemap,
2081 };
2082
CRIS linux kernel tree