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Merge tag 'for-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power...
[mirror_ubuntu-zesty-kernel.git] / fs / gfs2 / inode.c
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 struct gfs2_skip_data {
41 u64 no_addr;
42 int skipped;
43 int non_block;
44 };
45
46 static int iget_test(struct inode *inode, void *opaque)
47 {
48 struct gfs2_inode *ip = GFS2_I(inode);
49 struct gfs2_skip_data *data = opaque;
50
51 if (ip->i_no_addr == data->no_addr) {
52 if (data->non_block &&
53 inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) {
54 data->skipped = 1;
55 return 0;
56 }
57 return 1;
58 }
59 return 0;
60 }
61
62 static int iget_set(struct inode *inode, void *opaque)
63 {
64 struct gfs2_inode *ip = GFS2_I(inode);
65 struct gfs2_skip_data *data = opaque;
66
67 if (data->skipped)
68 return -ENOENT;
69 inode->i_ino = (unsigned long)(data->no_addr);
70 ip->i_no_addr = data->no_addr;
71 return 0;
72 }
73
74 struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block)
75 {
76 unsigned long hash = (unsigned long)no_addr;
77 struct gfs2_skip_data data;
78
79 data.no_addr = no_addr;
80 data.skipped = 0;
81 data.non_block = non_block;
82 return ilookup5(sb, hash, iget_test, &data);
83 }
84
85 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr,
86 int non_block)
87 {
88 struct gfs2_skip_data data;
89 unsigned long hash = (unsigned long)no_addr;
90
91 data.no_addr = no_addr;
92 data.skipped = 0;
93 data.non_block = non_block;
94 return iget5_locked(sb, hash, iget_test, iget_set, &data);
95 }
96
97 /**
98 * gfs2_set_iop - Sets inode operations
99 * @inode: The inode with correct i_mode filled in
100 *
101 * GFS2 lookup code fills in vfs inode contents based on info obtained
102 * from directory entry inside gfs2_inode_lookup().
103 */
104
105 static void gfs2_set_iop(struct inode *inode)
106 {
107 struct gfs2_sbd *sdp = GFS2_SB(inode);
108 umode_t mode = inode->i_mode;
109
110 if (S_ISREG(mode)) {
111 inode->i_op = &gfs2_file_iops;
112 if (gfs2_localflocks(sdp))
113 inode->i_fop = &gfs2_file_fops_nolock;
114 else
115 inode->i_fop = &gfs2_file_fops;
116 } else if (S_ISDIR(mode)) {
117 inode->i_op = &gfs2_dir_iops;
118 if (gfs2_localflocks(sdp))
119 inode->i_fop = &gfs2_dir_fops_nolock;
120 else
121 inode->i_fop = &gfs2_dir_fops;
122 } else if (S_ISLNK(mode)) {
123 inode->i_op = &gfs2_symlink_iops;
124 } else {
125 inode->i_op = &gfs2_file_iops;
126 init_special_inode(inode, inode->i_mode, inode->i_rdev);
127 }
128 }
129
130 /**
131 * gfs2_inode_lookup - Lookup an inode
132 * @sb: The super block
133 * @no_addr: The inode number
134 * @type: The type of the inode
135 * non_block: Can we block on inodes that are being freed?
136 *
137 * Returns: A VFS inode, or an error
138 */
139
140 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
141 u64 no_addr, u64 no_formal_ino, int non_block)
142 {
143 struct inode *inode;
144 struct gfs2_inode *ip;
145 struct gfs2_glock *io_gl = NULL;
146 int error;
147
148 inode = gfs2_iget(sb, no_addr, non_block);
149 ip = GFS2_I(inode);
150
151 if (!inode)
152 return ERR_PTR(-ENOMEM);
153
154 if (inode->i_state & I_NEW) {
155 struct gfs2_sbd *sdp = GFS2_SB(inode);
156 ip->i_no_formal_ino = no_formal_ino;
157
158 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
159 if (unlikely(error))
160 goto fail;
161 ip->i_gl->gl_object = ip;
162
163 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
164 if (unlikely(error))
165 goto fail_put;
166
167 set_bit(GIF_INVALID, &ip->i_flags);
168 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
169 if (unlikely(error))
170 goto fail_iopen;
171
172 ip->i_iopen_gh.gh_gl->gl_object = ip;
173 gfs2_glock_put(io_gl);
174 io_gl = NULL;
175
176 if (type == DT_UNKNOWN) {
177 /* Inode glock must be locked already */
178 error = gfs2_inode_refresh(GFS2_I(inode));
179 if (error)
180 goto fail_refresh;
181 } else {
182 inode->i_mode = DT2IF(type);
183 }
184
185 gfs2_set_iop(inode);
186 unlock_new_inode(inode);
187 }
188
189 return inode;
190
191 fail_refresh:
192 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
193 ip->i_iopen_gh.gh_gl->gl_object = NULL;
194 gfs2_glock_dq_wait(&ip->i_iopen_gh);
195 gfs2_holder_uninit(&ip->i_iopen_gh);
196 fail_iopen:
197 if (io_gl)
198 gfs2_glock_put(io_gl);
199 fail_put:
200 ip->i_gl->gl_object = NULL;
201 fail:
202 iget_failed(inode);
203 return ERR_PTR(error);
204 }
205
206 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
207 u64 *no_formal_ino, unsigned int blktype)
208 {
209 struct super_block *sb = sdp->sd_vfs;
210 struct gfs2_holder i_gh;
211 struct inode *inode = NULL;
212 int error;
213
214 /* Must not read in block until block type is verified */
215 error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops,
216 LM_ST_EXCLUSIVE, GL_SKIP, &i_gh);
217 if (error)
218 return ERR_PTR(error);
219
220 error = gfs2_check_blk_type(sdp, no_addr, blktype);
221 if (error)
222 goto fail;
223
224 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1);
225 if (IS_ERR(inode))
226 goto fail;
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 error = 0;
239 }
240
241 fail:
242 gfs2_glock_dq_uninit(&i_gh);
243 return error ? ERR_PTR(error) : inode;
244 fail_iput:
245 iput(inode);
246 goto fail;
247 }
248
249
250 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
251 {
252 struct qstr qstr;
253 struct inode *inode;
254 gfs2_str2qstr(&qstr, name);
255 inode = gfs2_lookupi(dip, &qstr, 1);
256 /* gfs2_lookupi has inconsistent callers: vfs
257 * related routines expect NULL for no entry found,
258 * gfs2_lookup_simple callers expect ENOENT
259 * and do not check for NULL.
260 */
261 if (inode == NULL)
262 return ERR_PTR(-ENOENT);
263 else
264 return inode;
265 }
266
267
268 /**
269 * gfs2_lookupi - Look up a filename in a directory and return its inode
270 * @d_gh: An initialized holder for the directory glock
271 * @name: The name of the inode to look for
272 * @is_root: If 1, ignore the caller's permissions
273 * @i_gh: An uninitialized holder for the new inode glock
274 *
275 * This can be called via the VFS filldir function when NFS is doing
276 * a readdirplus and the inode which its intending to stat isn't
277 * already in cache. In this case we must not take the directory glock
278 * again, since the readdir call will have already taken that lock.
279 *
280 * Returns: errno
281 */
282
283 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
284 int is_root)
285 {
286 struct super_block *sb = dir->i_sb;
287 struct gfs2_inode *dip = GFS2_I(dir);
288 struct gfs2_holder d_gh;
289 int error = 0;
290 struct inode *inode = NULL;
291 int unlock = 0;
292
293 if (!name->len || name->len > GFS2_FNAMESIZE)
294 return ERR_PTR(-ENAMETOOLONG);
295
296 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
297 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
298 dir == d_inode(sb->s_root))) {
299 igrab(dir);
300 return dir;
301 }
302
303 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
304 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
305 if (error)
306 return ERR_PTR(error);
307 unlock = 1;
308 }
309
310 if (!is_root) {
311 error = gfs2_permission(dir, MAY_EXEC);
312 if (error)
313 goto out;
314 }
315
316 inode = gfs2_dir_search(dir, name, false);
317 if (IS_ERR(inode))
318 error = PTR_ERR(inode);
319 out:
320 if (unlock)
321 gfs2_glock_dq_uninit(&d_gh);
322 if (error == -ENOENT)
323 return NULL;
324 return inode ? inode : ERR_PTR(error);
325 }
326
327 /**
328 * create_ok - OK to create a new on-disk inode here?
329 * @dip: Directory in which dinode is to be created
330 * @name: Name of new dinode
331 * @mode:
332 *
333 * Returns: errno
334 */
335
336 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
337 umode_t mode)
338 {
339 int error;
340
341 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
342 if (error)
343 return error;
344
345 /* Don't create entries in an unlinked directory */
346 if (!dip->i_inode.i_nlink)
347 return -ENOENT;
348
349 if (dip->i_entries == (u32)-1)
350 return -EFBIG;
351 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
352 return -EMLINK;
353
354 return 0;
355 }
356
357 static void munge_mode_uid_gid(const struct gfs2_inode *dip,
358 struct inode *inode)
359 {
360 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
361 (dip->i_inode.i_mode & S_ISUID) &&
362 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
363 if (S_ISDIR(inode->i_mode))
364 inode->i_mode |= S_ISUID;
365 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
366 inode->i_mode &= ~07111;
367 inode->i_uid = dip->i_inode.i_uid;
368 } else
369 inode->i_uid = current_fsuid();
370
371 if (dip->i_inode.i_mode & S_ISGID) {
372 if (S_ISDIR(inode->i_mode))
373 inode->i_mode |= S_ISGID;
374 inode->i_gid = dip->i_inode.i_gid;
375 } else
376 inode->i_gid = current_fsgid();
377 }
378
379 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
380 {
381 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
382 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
383 int error;
384
385 error = gfs2_quota_lock_check(ip, &ap);
386 if (error)
387 goto out;
388
389 error = gfs2_inplace_reserve(ip, &ap);
390 if (error)
391 goto out_quota;
392
393 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
394 if (error)
395 goto out_ipreserv;
396
397 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
398 ip->i_no_formal_ino = ip->i_generation;
399 ip->i_inode.i_ino = ip->i_no_addr;
400 ip->i_goal = ip->i_no_addr;
401
402 gfs2_trans_end(sdp);
403
404 out_ipreserv:
405 gfs2_inplace_release(ip);
406 out_quota:
407 gfs2_quota_unlock(ip);
408 out:
409 return error;
410 }
411
412 static void gfs2_init_dir(struct buffer_head *dibh,
413 const struct gfs2_inode *parent)
414 {
415 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
416 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
417
418 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
419 dent->de_inum = di->di_num; /* already GFS2 endian */
420 dent->de_type = cpu_to_be16(DT_DIR);
421
422 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
423 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
424 gfs2_inum_out(parent, dent);
425 dent->de_type = cpu_to_be16(DT_DIR);
426
427 }
428
429 /**
430 * gfs2_init_xattr - Initialise an xattr block for a new inode
431 * @ip: The inode in question
432 *
433 * This sets up an empty xattr block for a new inode, ready to
434 * take any ACLs, LSM xattrs, etc.
435 */
436
437 static void gfs2_init_xattr(struct gfs2_inode *ip)
438 {
439 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
440 struct buffer_head *bh;
441 struct gfs2_ea_header *ea;
442
443 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
444 gfs2_trans_add_meta(ip->i_gl, bh);
445 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
446 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
447
448 ea = GFS2_EA_BH2FIRST(bh);
449 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
450 ea->ea_type = GFS2_EATYPE_UNUSED;
451 ea->ea_flags = GFS2_EAFLAG_LAST;
452
453 brelse(bh);
454 }
455
456 /**
457 * init_dinode - Fill in a new dinode structure
458 * @dip: The directory this inode is being created in
459 * @ip: The inode
460 * @symname: The symlink destination (if a symlink)
461 * @bhp: The buffer head (returned to caller)
462 *
463 */
464
465 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
466 const char *symname)
467 {
468 struct gfs2_dinode *di;
469 struct buffer_head *dibh;
470
471 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
472 gfs2_trans_add_meta(ip->i_gl, dibh);
473 di = (struct gfs2_dinode *)dibh->b_data;
474 gfs2_dinode_out(ip, di);
475
476 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
477 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
478 di->__pad1 = 0;
479 di->__pad2 = 0;
480 di->__pad3 = 0;
481 memset(&di->__pad4, 0, sizeof(di->__pad4));
482 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
483 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
484
485 switch(ip->i_inode.i_mode & S_IFMT) {
486 case S_IFDIR:
487 gfs2_init_dir(dibh, dip);
488 break;
489 case S_IFLNK:
490 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
491 break;
492 }
493
494 set_buffer_uptodate(dibh);
495 brelse(dibh);
496 }
497
498 /**
499 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
500 * @dip: The directory we are linking into
501 * @da: The dir add information
502 * @nr_inodes: The number of inodes involved
503 *
504 * This calculate the number of blocks we need to reserve in a
505 * transaction to link @nr_inodes into a directory. In most cases
506 * @nr_inodes will be 2 (the directory plus the inode being linked in)
507 * but in case of rename, 4 may be required.
508 *
509 * Returns: Number of blocks
510 */
511
512 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
513 const struct gfs2_diradd *da,
514 unsigned nr_inodes)
515 {
516 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
517 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
518 }
519
520 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
521 struct gfs2_inode *ip, struct gfs2_diradd *da)
522 {
523 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
524 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
525 int error;
526
527 if (da->nr_blocks) {
528 error = gfs2_quota_lock_check(dip, &ap);
529 if (error)
530 goto fail_quota_locks;
531
532 error = gfs2_inplace_reserve(dip, &ap);
533 if (error)
534 goto fail_quota_locks;
535
536 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
537 if (error)
538 goto fail_ipreserv;
539 } else {
540 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
541 if (error)
542 goto fail_quota_locks;
543 }
544
545 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
546
547 gfs2_trans_end(sdp);
548 fail_ipreserv:
549 gfs2_inplace_release(dip);
550 fail_quota_locks:
551 gfs2_quota_unlock(dip);
552 return error;
553 }
554
555 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
556 void *fs_info)
557 {
558 const struct xattr *xattr;
559 int err = 0;
560
561 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
562 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
563 xattr->value_len, 0,
564 GFS2_EATYPE_SECURITY);
565 if (err < 0)
566 break;
567 }
568 return err;
569 }
570
571 /**
572 * gfs2_create_inode - Create a new inode
573 * @dir: The parent directory
574 * @dentry: The new dentry
575 * @file: If non-NULL, the file which is being opened
576 * @mode: The permissions on the new inode
577 * @dev: For device nodes, this is the device number
578 * @symname: For symlinks, this is the link destination
579 * @size: The initial size of the inode (ignored for directories)
580 *
581 * Returns: 0 on success, or error code
582 */
583
584 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
585 struct file *file,
586 umode_t mode, dev_t dev, const char *symname,
587 unsigned int size, int excl, int *opened)
588 {
589 const struct qstr *name = &dentry->d_name;
590 struct posix_acl *default_acl, *acl;
591 struct gfs2_holder ghs[2];
592 struct inode *inode = NULL;
593 struct gfs2_inode *dip = GFS2_I(dir), *ip;
594 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
595 struct gfs2_glock *io_gl;
596 int error, free_vfs_inode = 1;
597 u32 aflags = 0;
598 unsigned blocks = 1;
599 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
600
601 if (!name->len || name->len > GFS2_FNAMESIZE)
602 return -ENAMETOOLONG;
603
604 error = gfs2_rsqa_alloc(dip);
605 if (error)
606 return error;
607
608 error = gfs2_rindex_update(sdp);
609 if (error)
610 return error;
611
612 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
613 if (error)
614 goto fail;
615
616 error = create_ok(dip, name, mode);
617 if (error)
618 goto fail_gunlock;
619
620 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
621 error = PTR_ERR(inode);
622 if (!IS_ERR(inode)) {
623 if (S_ISDIR(inode->i_mode)) {
624 iput(inode);
625 inode = ERR_PTR(-EISDIR);
626 goto fail_gunlock;
627 }
628 d_instantiate(dentry, inode);
629 error = 0;
630 if (file) {
631 if (S_ISREG(inode->i_mode))
632 error = finish_open(file, dentry, gfs2_open_common, opened);
633 else
634 error = finish_no_open(file, NULL);
635 }
636 gfs2_glock_dq_uninit(ghs);
637 return error;
638 } else if (error != -ENOENT) {
639 goto fail_gunlock;
640 }
641
642 error = gfs2_diradd_alloc_required(dir, name, &da);
643 if (error < 0)
644 goto fail_gunlock;
645
646 inode = new_inode(sdp->sd_vfs);
647 error = -ENOMEM;
648 if (!inode)
649 goto fail_gunlock;
650
651 error = posix_acl_create(dir, &mode, &default_acl, &acl);
652 if (error)
653 goto fail_gunlock;
654
655 ip = GFS2_I(inode);
656 error = gfs2_rsqa_alloc(ip);
657 if (error)
658 goto fail_free_acls;
659
660 inode->i_mode = mode;
661 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
662 inode->i_rdev = dev;
663 inode->i_size = size;
664 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
665 gfs2_set_inode_blocks(inode, 1);
666 munge_mode_uid_gid(dip, inode);
667 check_and_update_goal(dip);
668 ip->i_goal = dip->i_goal;
669 ip->i_diskflags = 0;
670 ip->i_eattr = 0;
671 ip->i_height = 0;
672 ip->i_depth = 0;
673 ip->i_entries = 0;
674
675 switch(mode & S_IFMT) {
676 case S_IFREG:
677 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
678 gfs2_tune_get(sdp, gt_new_files_jdata))
679 ip->i_diskflags |= GFS2_DIF_JDATA;
680 gfs2_set_aops(inode);
681 break;
682 case S_IFDIR:
683 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
684 ip->i_diskflags |= GFS2_DIF_JDATA;
685 ip->i_entries = 2;
686 break;
687 }
688
689 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
690 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
691 ip->i_diskflags |= GFS2_DIF_SYSTEM;
692
693 gfs2_set_inode_flags(inode);
694
695 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
696 (dip->i_diskflags & GFS2_DIF_TOPDIR))
697 aflags |= GFS2_AF_ORLOV;
698
699 if (default_acl || acl)
700 blocks++;
701
702 error = alloc_dinode(ip, aflags, &blocks);
703 if (error)
704 goto fail_free_inode;
705
706 gfs2_set_inode_blocks(inode, blocks);
707
708 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
709 if (error)
710 goto fail_free_inode;
711
712 ip->i_gl->gl_object = ip;
713 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
714 if (error)
715 goto fail_free_inode;
716
717 error = gfs2_trans_begin(sdp, blocks, 0);
718 if (error)
719 goto fail_gunlock2;
720
721 if (blocks > 1) {
722 ip->i_eattr = ip->i_no_addr + 1;
723 gfs2_init_xattr(ip);
724 }
725 init_dinode(dip, ip, symname);
726 gfs2_trans_end(sdp);
727
728 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
729 if (error)
730 goto fail_gunlock2;
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 ip->i_iopen_gh.gh_gl->gl_object = 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 return error;
775
776 fail_gunlock3:
777 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
778 gfs2_glock_put(io_gl);
779 fail_gunlock2:
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;
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;
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_unhashed(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;
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 = { .gh_gl = NULL, };
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 if (d_really_is_positive(ndentry)) {
1368 nip = GFS2_I(d_inode(ndentry));
1369 if (ip == nip)
1370 return 0;
1371 }
1372
1373 error = gfs2_rindex_update(sdp);
1374 if (error)
1375 return error;
1376
1377 error = gfs2_rsqa_alloc(ndip);
1378 if (error)
1379 return error;
1380
1381 if (odip != ndip) {
1382 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1383 0, &r_gh);
1384 if (error)
1385 goto out;
1386
1387 if (S_ISDIR(ip->i_inode.i_mode)) {
1388 dir_rename = 1;
1389 /* don't move a directory into its subdir */
1390 error = gfs2_ok_to_move(ip, ndip);
1391 if (error)
1392 goto out_gunlock_r;
1393 }
1394 }
1395
1396 num_gh = 1;
1397 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1398 if (odip != ndip) {
1399 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1400 num_gh++;
1401 }
1402 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1403 num_gh++;
1404
1405 if (nip) {
1406 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1407 num_gh++;
1408 /* grab the resource lock for unlink flag twiddling
1409 * this is the case of the target file already existing
1410 * so we unlink before doing the rename
1411 */
1412 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1413 if (nrgd)
1414 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
1415 }
1416
1417 for (x = 0; x < num_gh; x++) {
1418 error = gfs2_glock_nq(ghs + x);
1419 if (error)
1420 goto out_gunlock;
1421 }
1422
1423 error = -ENOENT;
1424 if (ip->i_inode.i_nlink == 0)
1425 goto out_gunlock;
1426
1427 /* Check out the old directory */
1428
1429 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1430 if (error)
1431 goto out_gunlock;
1432
1433 /* Check out the new directory */
1434
1435 if (nip) {
1436 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1437 if (error)
1438 goto out_gunlock;
1439
1440 if (nip->i_inode.i_nlink == 0) {
1441 error = -EAGAIN;
1442 goto out_gunlock;
1443 }
1444
1445 if (S_ISDIR(nip->i_inode.i_mode)) {
1446 if (nip->i_entries < 2) {
1447 gfs2_consist_inode(nip);
1448 error = -EIO;
1449 goto out_gunlock;
1450 }
1451 if (nip->i_entries > 2) {
1452 error = -ENOTEMPTY;
1453 goto out_gunlock;
1454 }
1455 }
1456 } else {
1457 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1458 if (error)
1459 goto out_gunlock;
1460
1461 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1462 switch (error) {
1463 case -ENOENT:
1464 error = 0;
1465 break;
1466 case 0:
1467 error = -EEXIST;
1468 default:
1469 goto out_gunlock;
1470 };
1471
1472 if (odip != ndip) {
1473 if (!ndip->i_inode.i_nlink) {
1474 error = -ENOENT;
1475 goto out_gunlock;
1476 }
1477 if (ndip->i_entries == (u32)-1) {
1478 error = -EFBIG;
1479 goto out_gunlock;
1480 }
1481 if (S_ISDIR(ip->i_inode.i_mode) &&
1482 ndip->i_inode.i_nlink == (u32)-1) {
1483 error = -EMLINK;
1484 goto out_gunlock;
1485 }
1486 }
1487 }
1488
1489 /* Check out the dir to be renamed */
1490
1491 if (dir_rename) {
1492 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1493 if (error)
1494 goto out_gunlock;
1495 }
1496
1497 if (nip == NULL) {
1498 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1499 if (error)
1500 goto out_gunlock;
1501 }
1502
1503 if (da.nr_blocks) {
1504 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1505 error = gfs2_quota_lock_check(ndip, &ap);
1506 if (error)
1507 goto out_gunlock;
1508
1509 error = gfs2_inplace_reserve(ndip, &ap);
1510 if (error)
1511 goto out_gunlock_q;
1512
1513 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1514 4 * RES_LEAF + 4, 0);
1515 if (error)
1516 goto out_ipreserv;
1517 } else {
1518 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1519 5 * RES_LEAF + 4, 0);
1520 if (error)
1521 goto out_gunlock;
1522 }
1523
1524 /* Remove the target file, if it exists */
1525
1526 if (nip)
1527 error = gfs2_unlink_inode(ndip, ndentry);
1528
1529 error = update_moved_ino(ip, ndip, dir_rename);
1530 if (error)
1531 goto out_end_trans;
1532
1533 error = gfs2_dir_del(odip, odentry);
1534 if (error)
1535 goto out_end_trans;
1536
1537 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1538 if (error)
1539 goto out_end_trans;
1540
1541 out_end_trans:
1542 gfs2_trans_end(sdp);
1543 out_ipreserv:
1544 if (da.nr_blocks)
1545 gfs2_inplace_release(ndip);
1546 out_gunlock_q:
1547 if (da.nr_blocks)
1548 gfs2_quota_unlock(ndip);
1549 out_gunlock:
1550 gfs2_dir_no_add(&da);
1551 while (x--) {
1552 gfs2_glock_dq(ghs + x);
1553 gfs2_holder_uninit(ghs + x);
1554 }
1555 out_gunlock_r:
1556 if (r_gh.gh_gl)
1557 gfs2_glock_dq_uninit(&r_gh);
1558 out:
1559 return error;
1560 }
1561
1562 /**
1563 * gfs2_exchange - exchange two files
1564 * @odir: Parent directory of old file name
1565 * @odentry: The old dentry of the file
1566 * @ndir: Parent directory of new file name
1567 * @ndentry: The new dentry of the file
1568 * @flags: The rename flags
1569 *
1570 * Returns: errno
1571 */
1572
1573 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1574 struct inode *ndir, struct dentry *ndentry,
1575 unsigned int flags)
1576 {
1577 struct gfs2_inode *odip = GFS2_I(odir);
1578 struct gfs2_inode *ndip = GFS2_I(ndir);
1579 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1580 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1581 struct gfs2_sbd *sdp = GFS2_SB(odir);
1582 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
1583 unsigned int num_gh;
1584 unsigned int x;
1585 umode_t old_mode = oip->i_inode.i_mode;
1586 umode_t new_mode = nip->i_inode.i_mode;
1587 int error;
1588
1589 error = gfs2_rindex_update(sdp);
1590 if (error)
1591 return error;
1592
1593 if (odip != ndip) {
1594 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1595 0, &r_gh);
1596 if (error)
1597 goto out;
1598
1599 if (S_ISDIR(old_mode)) {
1600 /* don't move a directory into its subdir */
1601 error = gfs2_ok_to_move(oip, ndip);
1602 if (error)
1603 goto out_gunlock_r;
1604 }
1605
1606 if (S_ISDIR(new_mode)) {
1607 /* don't move a directory into its subdir */
1608 error = gfs2_ok_to_move(nip, odip);
1609 if (error)
1610 goto out_gunlock_r;
1611 }
1612 }
1613
1614 num_gh = 1;
1615 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1616 if (odip != ndip) {
1617 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1618 num_gh++;
1619 }
1620 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1621 num_gh++;
1622
1623 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1624 num_gh++;
1625
1626 for (x = 0; x < num_gh; x++) {
1627 error = gfs2_glock_nq(ghs + x);
1628 if (error)
1629 goto out_gunlock;
1630 }
1631
1632 error = -ENOENT;
1633 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1634 goto out_gunlock;
1635
1636 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1637 if (error)
1638 goto out_gunlock;
1639 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1640 if (error)
1641 goto out_gunlock;
1642
1643 if (S_ISDIR(old_mode)) {
1644 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1645 if (error)
1646 goto out_gunlock;
1647 }
1648 if (S_ISDIR(new_mode)) {
1649 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1650 if (error)
1651 goto out_gunlock;
1652 }
1653 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1654 if (error)
1655 goto out_gunlock;
1656
1657 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1658 if (error)
1659 goto out_end_trans;
1660
1661 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1662 if (error)
1663 goto out_end_trans;
1664
1665 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1666 IF2DT(old_mode));
1667 if (error)
1668 goto out_end_trans;
1669
1670 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1671 IF2DT(new_mode));
1672 if (error)
1673 goto out_end_trans;
1674
1675 if (odip != ndip) {
1676 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1677 inc_nlink(&odip->i_inode);
1678 drop_nlink(&ndip->i_inode);
1679 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1680 inc_nlink(&ndip->i_inode);
1681 drop_nlink(&odip->i_inode);
1682 }
1683 }
1684 mark_inode_dirty(&ndip->i_inode);
1685 if (odip != ndip)
1686 mark_inode_dirty(&odip->i_inode);
1687
1688 out_end_trans:
1689 gfs2_trans_end(sdp);
1690 out_gunlock:
1691 while (x--) {
1692 gfs2_glock_dq(ghs + x);
1693 gfs2_holder_uninit(ghs + x);
1694 }
1695 out_gunlock_r:
1696 if (r_gh.gh_gl)
1697 gfs2_glock_dq_uninit(&r_gh);
1698 out:
1699 return error;
1700 }
1701
1702 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1703 struct inode *ndir, struct dentry *ndentry,
1704 unsigned int flags)
1705 {
1706 flags &= ~RENAME_NOREPLACE;
1707
1708 if (flags & ~RENAME_EXCHANGE)
1709 return -EINVAL;
1710
1711 if (flags & RENAME_EXCHANGE)
1712 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1713
1714 return gfs2_rename(odir, odentry, ndir, ndentry);
1715 }
1716
1717 /**
1718 * gfs2_get_link - Follow a symbolic link
1719 * @dentry: The dentry of the link
1720 * @inode: The inode of the link
1721 * @done: destructor for return value
1722 *
1723 * This can handle symlinks of any size.
1724 *
1725 * Returns: 0 on success or error code
1726 */
1727
1728 static const char *gfs2_get_link(struct dentry *dentry,
1729 struct inode *inode,
1730 struct delayed_call *done)
1731 {
1732 struct gfs2_inode *ip = GFS2_I(inode);
1733 struct gfs2_holder i_gh;
1734 struct buffer_head *dibh;
1735 unsigned int size;
1736 char *buf;
1737 int error;
1738
1739 if (!dentry)
1740 return ERR_PTR(-ECHILD);
1741
1742 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1743 error = gfs2_glock_nq(&i_gh);
1744 if (error) {
1745 gfs2_holder_uninit(&i_gh);
1746 return ERR_PTR(error);
1747 }
1748
1749 size = (unsigned int)i_size_read(&ip->i_inode);
1750 if (size == 0) {
1751 gfs2_consist_inode(ip);
1752 buf = ERR_PTR(-EIO);
1753 goto out;
1754 }
1755
1756 error = gfs2_meta_inode_buffer(ip, &dibh);
1757 if (error) {
1758 buf = ERR_PTR(error);
1759 goto out;
1760 }
1761
1762 buf = kzalloc(size + 1, GFP_NOFS);
1763 if (!buf)
1764 buf = ERR_PTR(-ENOMEM);
1765 else
1766 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1767 brelse(dibh);
1768 out:
1769 gfs2_glock_dq_uninit(&i_gh);
1770 if (!IS_ERR(buf))
1771 set_delayed_call(done, kfree_link, buf);
1772 return buf;
1773 }
1774
1775 /**
1776 * gfs2_permission -
1777 * @inode: The inode
1778 * @mask: The mask to be tested
1779 * @flags: Indicates whether this is an RCU path walk or not
1780 *
1781 * This may be called from the VFS directly, or from within GFS2 with the
1782 * inode locked, so we look to see if the glock is already locked and only
1783 * lock the glock if its not already been done.
1784 *
1785 * Returns: errno
1786 */
1787
1788 int gfs2_permission(struct inode *inode, int mask)
1789 {
1790 struct gfs2_inode *ip;
1791 struct gfs2_holder i_gh;
1792 int error;
1793 int unlock = 0;
1794
1795
1796 ip = GFS2_I(inode);
1797 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1798 if (mask & MAY_NOT_BLOCK)
1799 return -ECHILD;
1800 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1801 if (error)
1802 return error;
1803 unlock = 1;
1804 }
1805
1806 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1807 error = -EACCES;
1808 else
1809 error = generic_permission(inode, mask);
1810 if (unlock)
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 = inode_change_ok(inode, 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 int unlock = 0;
1983
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 unlock = 1;
1989 }
1990
1991 generic_fillattr(inode, stat);
1992 if (unlock)
1993 gfs2_glock_dq_uninit(&gh);
1994
1995 return 0;
1996 }
1997
1998 static int gfs2_setxattr(struct dentry *dentry, const char *name,
1999 const void *data, size_t size, int flags)
2000 {
2001 struct inode *inode = d_inode(dentry);
2002 struct gfs2_inode *ip = GFS2_I(inode);
2003 struct gfs2_holder gh;
2004 int ret;
2005
2006 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
2007 ret = gfs2_glock_nq(&gh);
2008 if (ret == 0) {
2009 ret = gfs2_rsqa_alloc(ip);
2010 if (ret == 0)
2011 ret = generic_setxattr(dentry, name, data, size, flags);
2012 gfs2_glock_dq(&gh);
2013 }
2014 gfs2_holder_uninit(&gh);
2015 return ret;
2016 }
2017
2018 static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
2019 void *data, size_t size)
2020 {
2021 struct inode *inode = d_inode(dentry);
2022 struct gfs2_inode *ip = GFS2_I(inode);
2023 struct gfs2_holder gh;
2024 int ret;
2025
2026 /* For selinux during lookup */
2027 if (gfs2_glock_is_locked_by_me(ip->i_gl))
2028 return generic_getxattr(dentry, name, data, size);
2029
2030 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
2031 ret = gfs2_glock_nq(&gh);
2032 if (ret == 0) {
2033 ret = generic_getxattr(dentry, name, data, size);
2034 gfs2_glock_dq(&gh);
2035 }
2036 gfs2_holder_uninit(&gh);
2037 return ret;
2038 }
2039
2040 static int gfs2_removexattr(struct dentry *dentry, const char *name)
2041 {
2042 struct inode *inode = d_inode(dentry);
2043 struct gfs2_inode *ip = GFS2_I(inode);
2044 struct gfs2_holder gh;
2045 int ret;
2046
2047 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
2048 ret = gfs2_glock_nq(&gh);
2049 if (ret == 0) {
2050 ret = gfs2_rsqa_alloc(ip);
2051 if (ret == 0)
2052 ret = generic_removexattr(dentry, name);
2053 gfs2_glock_dq(&gh);
2054 }
2055 gfs2_holder_uninit(&gh);
2056 return ret;
2057 }
2058
2059 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2060 u64 start, u64 len)
2061 {
2062 struct gfs2_inode *ip = GFS2_I(inode);
2063 struct gfs2_holder gh;
2064 int ret;
2065
2066 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
2067 if (ret)
2068 return ret;
2069
2070 mutex_lock(&inode->i_mutex);
2071
2072 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2073 if (ret)
2074 goto out;
2075
2076 if (gfs2_is_stuffed(ip)) {
2077 u64 phys = ip->i_no_addr << inode->i_blkbits;
2078 u64 size = i_size_read(inode);
2079 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
2080 FIEMAP_EXTENT_DATA_INLINE;
2081 phys += sizeof(struct gfs2_dinode);
2082 phys += start;
2083 if (start + len > size)
2084 len = size - start;
2085 if (start < size)
2086 ret = fiemap_fill_next_extent(fieinfo, start, phys,
2087 len, flags);
2088 if (ret == 1)
2089 ret = 0;
2090 } else {
2091 ret = __generic_block_fiemap(inode, fieinfo, start, len,
2092 gfs2_block_map);
2093 }
2094
2095 gfs2_glock_dq_uninit(&gh);
2096 out:
2097 mutex_unlock(&inode->i_mutex);
2098 return ret;
2099 }
2100
2101 const struct inode_operations gfs2_file_iops = {
2102 .permission = gfs2_permission,
2103 .setattr = gfs2_setattr,
2104 .getattr = gfs2_getattr,
2105 .setxattr = gfs2_setxattr,
2106 .getxattr = gfs2_getxattr,
2107 .listxattr = gfs2_listxattr,
2108 .removexattr = gfs2_removexattr,
2109 .fiemap = gfs2_fiemap,
2110 .get_acl = gfs2_get_acl,
2111 .set_acl = gfs2_set_acl,
2112 };
2113
2114 const struct inode_operations gfs2_dir_iops = {
2115 .create = gfs2_create,
2116 .lookup = gfs2_lookup,
2117 .link = gfs2_link,
2118 .unlink = gfs2_unlink,
2119 .symlink = gfs2_symlink,
2120 .mkdir = gfs2_mkdir,
2121 .rmdir = gfs2_unlink,
2122 .mknod = gfs2_mknod,
2123 .rename2 = gfs2_rename2,
2124 .permission = gfs2_permission,
2125 .setattr = gfs2_setattr,
2126 .getattr = gfs2_getattr,
2127 .setxattr = gfs2_setxattr,
2128 .getxattr = gfs2_getxattr,
2129 .listxattr = gfs2_listxattr,
2130 .removexattr = gfs2_removexattr,
2131 .fiemap = gfs2_fiemap,
2132 .get_acl = gfs2_get_acl,
2133 .set_acl = gfs2_set_acl,
2134 .atomic_open = gfs2_atomic_open,
2135 };
2136
2137 const struct inode_operations gfs2_symlink_iops = {
2138 .readlink = generic_readlink,
2139 .get_link = gfs2_get_link,
2140 .permission = gfs2_permission,
2141 .setattr = gfs2_setattr,
2142 .getattr = gfs2_getattr,
2143 .setxattr = gfs2_setxattr,
2144 .getxattr = gfs2_getxattr,
2145 .listxattr = gfs2_listxattr,
2146 .removexattr = gfs2_removexattr,
2147 .fiemap = gfs2_fiemap,
2148 };
2149
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