]> git.ipfire.org Git - thirdparty/linux.git/blob - fs/gfs2/inode.c
projects / thirdparty / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
io_uring: reset -EBUSY error when io sq thread is waken up
[thirdparty/linux.git] / fs / gfs2 / inode.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
5 */
6
7 #include <linux/slab.h>
8 #include <linux/spinlock.h>
9 #include <linux/completion.h>
10 #include <linux/buffer_head.h>
11 #include <linux/namei.h>
12 #include <linux/mm.h>
13 #include <linux/cred.h>
14 #include <linux/xattr.h>
15 #include <linux/posix_acl.h>
16 #include <linux/gfs2_ondisk.h>
17 #include <linux/crc32.h>
18 #include <linux/iomap.h>
19 #include <linux/security.h>
20 #include <linux/uaccess.h>
21
22 #include "gfs2.h"
23 #include "incore.h"
24 #include "acl.h"
25 #include "bmap.h"
26 #include "dir.h"
27 #include "xattr.h"
28 #include "glock.h"
29 #include "inode.h"
30 #include "meta_io.h"
31 #include "quota.h"
32 #include "rgrp.h"
33 #include "trans.h"
34 #include "util.h"
35 #include "super.h"
36 #include "glops.h"
37
38 static int iget_test(struct inode *inode, void *opaque)
39 {
40 u64 no_addr = *(u64 *)opaque;
41
42 return GFS2_I(inode)->i_no_addr == no_addr;
43 }
44
45 static int iget_set(struct inode *inode, void *opaque)
46 {
47 u64 no_addr = *(u64 *)opaque;
48
49 GFS2_I(inode)->i_no_addr = no_addr;
50 inode->i_ino = no_addr;
51 return 0;
52 }
53
54 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
55 {
56 struct inode *inode;
57
58 repeat:
59 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr);
60 if (!inode)
61 return inode;
62 if (is_bad_inode(inode)) {
63 iput(inode);
64 goto repeat;
65 }
66 return inode;
67 }
68
69 /**
70 * gfs2_set_iop - Sets inode operations
71 * @inode: The inode with correct i_mode filled in
72 *
73 * GFS2 lookup code fills in vfs inode contents based on info obtained
74 * from directory entry inside gfs2_inode_lookup().
75 */
76
77 static void gfs2_set_iop(struct inode *inode)
78 {
79 struct gfs2_sbd *sdp = GFS2_SB(inode);
80 umode_t mode = inode->i_mode;
81
82 if (S_ISREG(mode)) {
83 inode->i_op = &gfs2_file_iops;
84 if (gfs2_localflocks(sdp))
85 inode->i_fop = &gfs2_file_fops_nolock;
86 else
87 inode->i_fop = &gfs2_file_fops;
88 } else if (S_ISDIR(mode)) {
89 inode->i_op = &gfs2_dir_iops;
90 if (gfs2_localflocks(sdp))
91 inode->i_fop = &gfs2_dir_fops_nolock;
92 else
93 inode->i_fop = &gfs2_dir_fops;
94 } else if (S_ISLNK(mode)) {
95 inode->i_op = &gfs2_symlink_iops;
96 } else {
97 inode->i_op = &gfs2_file_iops;
98 init_special_inode(inode, inode->i_mode, inode->i_rdev);
99 }
100 }
101
102 /**
103 * gfs2_inode_lookup - Lookup an inode
104 * @sb: The super block
105 * @type: The type of the inode
106 * @no_addr: The inode number
107 * @no_formal_ino: The inode generation number
108 * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED;
109 * GFS2_BLKST_FREE to indicate not to verify)
110 *
111 * If @type is DT_UNKNOWN, the inode type is fetched from disk.
112 *
113 * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a
114 * placeholder because it doesn't otherwise make sense), the on-disk block type
115 * is verified to be @blktype.
116 *
117 * Returns: A VFS inode, or an error
118 */
119
120 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
121 u64 no_addr, u64 no_formal_ino,
122 unsigned int blktype)
123 {
124 struct inode *inode;
125 struct gfs2_inode *ip;
126 struct gfs2_glock *io_gl = NULL;
127 struct gfs2_holder i_gh;
128 int error;
129
130 gfs2_holder_mark_uninitialized(&i_gh);
131 inode = gfs2_iget(sb, no_addr);
132 if (!inode)
133 return ERR_PTR(-ENOMEM);
134
135 ip = GFS2_I(inode);
136
137 if (inode->i_state & I_NEW) {
138 struct gfs2_sbd *sdp = GFS2_SB(inode);
139
140 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
141 if (unlikely(error))
142 goto fail;
143 flush_delayed_work(&ip->i_gl->gl_work);
144
145 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
146 if (unlikely(error))
147 goto fail;
148
149 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
150 /*
151 * The GL_SKIP flag indicates to skip reading the inode
152 * block. We read the inode with gfs2_inode_refresh
153 * after possibly checking the block type.
154 */
155 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
156 GL_SKIP, &i_gh);
157 if (error)
158 goto fail;
159
160 if (blktype != GFS2_BLKST_FREE) {
161 error = gfs2_check_blk_type(sdp, no_addr,
162 blktype);
163 if (error)
164 goto fail;
165 }
166 }
167
168 glock_set_object(ip->i_gl, ip);
169 set_bit(GIF_INVALID, &ip->i_flags);
170 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
171 if (unlikely(error))
172 goto fail;
173 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
174 gfs2_glock_put(io_gl);
175 io_gl = NULL;
176
177 /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
178 inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1);
179 inode->i_atime.tv_nsec = 0;
180
181 if (type == DT_UNKNOWN) {
182 /* Inode glock must be locked already */
183 error = gfs2_inode_refresh(GFS2_I(inode));
184 if (error)
185 goto fail;
186 } else {
187 ip->i_no_formal_ino = no_formal_ino;
188 inode->i_mode = DT2IF(type);
189 }
190
191 gfs2_set_iop(inode);
192
193 unlock_new_inode(inode);
194 }
195
196 if (gfs2_holder_initialized(&i_gh))
197 gfs2_glock_dq_uninit(&i_gh);
198 return inode;
199
200 fail:
201 if (io_gl)
202 gfs2_glock_put(io_gl);
203 if (gfs2_holder_initialized(&i_gh))
204 gfs2_glock_dq_uninit(&i_gh);
205 iget_failed(inode);
206 return ERR_PTR(error);
207 }
208
209 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
210 u64 *no_formal_ino, unsigned int blktype)
211 {
212 struct super_block *sb = sdp->sd_vfs;
213 struct inode *inode;
214 int error;
215
216 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype);
217 if (IS_ERR(inode))
218 return inode;
219
220 /* Two extra checks for NFS only */
221 if (no_formal_ino) {
222 error = -ESTALE;
223 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
224 goto fail_iput;
225
226 error = -EIO;
227 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
228 goto fail_iput;
229 }
230 return inode;
231
232 fail_iput:
233 iput(inode);
234 return ERR_PTR(error);
235 }
236
237
238 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
239 {
240 struct qstr qstr;
241 struct inode *inode;
242 gfs2_str2qstr(&qstr, name);
243 inode = gfs2_lookupi(dip, &qstr, 1);
244 /* gfs2_lookupi has inconsistent callers: vfs
245 * related routines expect NULL for no entry found,
246 * gfs2_lookup_simple callers expect ENOENT
247 * and do not check for NULL.
248 */
249 if (inode == NULL)
250 return ERR_PTR(-ENOENT);
251 else
252 return inode;
253 }
254
255
256 /**
257 * gfs2_lookupi - Look up a filename in a directory and return its inode
258 * @d_gh: An initialized holder for the directory glock
259 * @name: The name of the inode to look for
260 * @is_root: If 1, ignore the caller's permissions
261 * @i_gh: An uninitialized holder for the new inode glock
262 *
263 * This can be called via the VFS filldir function when NFS is doing
264 * a readdirplus and the inode which its intending to stat isn't
265 * already in cache. In this case we must not take the directory glock
266 * again, since the readdir call will have already taken that lock.
267 *
268 * Returns: errno
269 */
270
271 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
272 int is_root)
273 {
274 struct super_block *sb = dir->i_sb;
275 struct gfs2_inode *dip = GFS2_I(dir);
276 struct gfs2_holder d_gh;
277 int error = 0;
278 struct inode *inode = NULL;
279
280 gfs2_holder_mark_uninitialized(&d_gh);
281 if (!name->len || name->len > GFS2_FNAMESIZE)
282 return ERR_PTR(-ENAMETOOLONG);
283
284 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
285 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
286 dir == d_inode(sb->s_root))) {
287 igrab(dir);
288 return dir;
289 }
290
291 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
292 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
293 if (error)
294 return ERR_PTR(error);
295 }
296
297 if (!is_root) {
298 error = gfs2_permission(dir, MAY_EXEC);
299 if (error)
300 goto out;
301 }
302
303 inode = gfs2_dir_search(dir, name, false);
304 if (IS_ERR(inode))
305 error = PTR_ERR(inode);
306 out:
307 if (gfs2_holder_initialized(&d_gh))
308 gfs2_glock_dq_uninit(&d_gh);
309 if (error == -ENOENT)
310 return NULL;
311 return inode ? inode : ERR_PTR(error);
312 }
313
314 /**
315 * create_ok - OK to create a new on-disk inode here?
316 * @dip: Directory in which dinode is to be created
317 * @name: Name of new dinode
318 * @mode:
319 *
320 * Returns: errno
321 */
322
323 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
324 umode_t mode)
325 {
326 int error;
327
328 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
329 if (error)
330 return error;
331
332 /* Don't create entries in an unlinked directory */
333 if (!dip->i_inode.i_nlink)
334 return -ENOENT;
335
336 if (dip->i_entries == (u32)-1)
337 return -EFBIG;
338 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
339 return -EMLINK;
340
341 return 0;
342 }
343
344 static void munge_mode_uid_gid(const struct gfs2_inode *dip,
345 struct inode *inode)
346 {
347 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
348 (dip->i_inode.i_mode & S_ISUID) &&
349 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
350 if (S_ISDIR(inode->i_mode))
351 inode->i_mode |= S_ISUID;
352 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
353 inode->i_mode &= ~07111;
354 inode->i_uid = dip->i_inode.i_uid;
355 } else
356 inode->i_uid = current_fsuid();
357
358 if (dip->i_inode.i_mode & S_ISGID) {
359 if (S_ISDIR(inode->i_mode))
360 inode->i_mode |= S_ISGID;
361 inode->i_gid = dip->i_inode.i_gid;
362 } else
363 inode->i_gid = current_fsgid();
364 }
365
366 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
367 {
368 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
369 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
370 int error;
371
372 error = gfs2_quota_lock_check(ip, &ap);
373 if (error)
374 goto out;
375
376 error = gfs2_inplace_reserve(ip, &ap);
377 if (error)
378 goto out_quota;
379
380 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
381 if (error)
382 goto out_ipreserv;
383
384 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
385 ip->i_no_formal_ino = ip->i_generation;
386 ip->i_inode.i_ino = ip->i_no_addr;
387 ip->i_goal = ip->i_no_addr;
388
389 gfs2_trans_end(sdp);
390
391 out_ipreserv:
392 gfs2_inplace_release(ip);
393 out_quota:
394 gfs2_quota_unlock(ip);
395 out:
396 return error;
397 }
398
399 static void gfs2_init_dir(struct buffer_head *dibh,
400 const struct gfs2_inode *parent)
401 {
402 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
403 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
404
405 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
406 dent->de_inum = di->di_num; /* already GFS2 endian */
407 dent->de_type = cpu_to_be16(DT_DIR);
408
409 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
410 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
411 gfs2_inum_out(parent, dent);
412 dent->de_type = cpu_to_be16(DT_DIR);
413
414 }
415
416 /**
417 * gfs2_init_xattr - Initialise an xattr block for a new inode
418 * @ip: The inode in question
419 *
420 * This sets up an empty xattr block for a new inode, ready to
421 * take any ACLs, LSM xattrs, etc.
422 */
423
424 static void gfs2_init_xattr(struct gfs2_inode *ip)
425 {
426 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
427 struct buffer_head *bh;
428 struct gfs2_ea_header *ea;
429
430 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
431 gfs2_trans_add_meta(ip->i_gl, bh);
432 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
433 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
434
435 ea = GFS2_EA_BH2FIRST(bh);
436 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
437 ea->ea_type = GFS2_EATYPE_UNUSED;
438 ea->ea_flags = GFS2_EAFLAG_LAST;
439
440 brelse(bh);
441 }
442
443 /**
444 * init_dinode - Fill in a new dinode structure
445 * @dip: The directory this inode is being created in
446 * @ip: The inode
447 * @symname: The symlink destination (if a symlink)
448 * @bhp: The buffer head (returned to caller)
449 *
450 */
451
452 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
453 const char *symname)
454 {
455 struct gfs2_dinode *di;
456 struct buffer_head *dibh;
457
458 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
459 gfs2_trans_add_meta(ip->i_gl, dibh);
460 di = (struct gfs2_dinode *)dibh->b_data;
461 gfs2_dinode_out(ip, di);
462
463 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
464 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
465 di->__pad1 = 0;
466 di->__pad2 = 0;
467 di->__pad3 = 0;
468 memset(&di->__pad4, 0, sizeof(di->__pad4));
469 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
470 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
471
472 switch(ip->i_inode.i_mode & S_IFMT) {
473 case S_IFDIR:
474 gfs2_init_dir(dibh, dip);
475 break;
476 case S_IFLNK:
477 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
478 break;
479 }
480
481 set_buffer_uptodate(dibh);
482 brelse(dibh);
483 }
484
485 /**
486 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
487 * @dip: The directory we are linking into
488 * @da: The dir add information
489 * @nr_inodes: The number of inodes involved
490 *
491 * This calculate the number of blocks we need to reserve in a
492 * transaction to link @nr_inodes into a directory. In most cases
493 * @nr_inodes will be 2 (the directory plus the inode being linked in)
494 * but in case of rename, 4 may be required.
495 *
496 * Returns: Number of blocks
497 */
498
499 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
500 const struct gfs2_diradd *da,
501 unsigned nr_inodes)
502 {
503 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
504 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
505 }
506
507 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
508 struct gfs2_inode *ip, struct gfs2_diradd *da)
509 {
510 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
511 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
512 int error;
513
514 if (da->nr_blocks) {
515 error = gfs2_quota_lock_check(dip, &ap);
516 if (error)
517 goto fail_quota_locks;
518
519 error = gfs2_inplace_reserve(dip, &ap);
520 if (error)
521 goto fail_quota_locks;
522
523 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
524 if (error)
525 goto fail_ipreserv;
526 } else {
527 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
528 if (error)
529 goto fail_quota_locks;
530 }
531
532 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
533
534 gfs2_trans_end(sdp);
535 fail_ipreserv:
536 gfs2_inplace_release(dip);
537 fail_quota_locks:
538 gfs2_quota_unlock(dip);
539 return error;
540 }
541
542 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
543 void *fs_info)
544 {
545 const struct xattr *xattr;
546 int err = 0;
547
548 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
549 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
550 xattr->value_len, 0,
551 GFS2_EATYPE_SECURITY);
552 if (err < 0)
553 break;
554 }
555 return err;
556 }
557
558 /**
559 * gfs2_create_inode - Create a new inode
560 * @dir: The parent directory
561 * @dentry: The new dentry
562 * @file: If non-NULL, the file which is being opened
563 * @mode: The permissions on the new inode
564 * @dev: For device nodes, this is the device number
565 * @symname: For symlinks, this is the link destination
566 * @size: The initial size of the inode (ignored for directories)
567 *
568 * Returns: 0 on success, or error code
569 */
570
571 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
572 struct file *file,
573 umode_t mode, dev_t dev, const char *symname,
574 unsigned int size, int excl)
575 {
576 const struct qstr *name = &dentry->d_name;
577 struct posix_acl *default_acl, *acl;
578 struct gfs2_holder ghs[2];
579 struct inode *inode = NULL;
580 struct gfs2_inode *dip = GFS2_I(dir), *ip;
581 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
582 struct gfs2_glock *io_gl = NULL;
583 int error, free_vfs_inode = 1;
584 u32 aflags = 0;
585 unsigned blocks = 1;
586 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
587
588 if (!name->len || name->len > GFS2_FNAMESIZE)
589 return -ENAMETOOLONG;
590
591 error = gfs2_qa_get(dip);
592 if (error)
593 return error;
594
595 error = gfs2_rindex_update(sdp);
596 if (error)
597 goto fail;
598
599 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
600 if (error)
601 goto fail;
602 gfs2_holder_mark_uninitialized(ghs + 1);
603
604 error = create_ok(dip, name, mode);
605 if (error)
606 goto fail_gunlock;
607
608 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
609 error = PTR_ERR(inode);
610 if (!IS_ERR(inode)) {
611 if (S_ISDIR(inode->i_mode)) {
612 iput(inode);
613 inode = ERR_PTR(-EISDIR);
614 goto fail_gunlock;
615 }
616 d_instantiate(dentry, inode);
617 error = 0;
618 if (file) {
619 if (S_ISREG(inode->i_mode))
620 error = finish_open(file, dentry, gfs2_open_common);
621 else
622 error = finish_no_open(file, NULL);
623 }
624 gfs2_glock_dq_uninit(ghs);
625 return error;
626 } else if (error != -ENOENT) {
627 goto fail_gunlock;
628 }
629
630 error = gfs2_diradd_alloc_required(dir, name, &da);
631 if (error < 0)
632 goto fail_gunlock;
633
634 inode = new_inode(sdp->sd_vfs);
635 error = -ENOMEM;
636 if (!inode)
637 goto fail_gunlock;
638
639 error = posix_acl_create(dir, &mode, &default_acl, &acl);
640 if (error)
641 goto fail_gunlock;
642
643 ip = GFS2_I(inode);
644 error = gfs2_qa_get(ip);
645 if (error)
646 goto fail_free_acls;
647
648 inode->i_mode = mode;
649 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
650 inode->i_rdev = dev;
651 inode->i_size = size;
652 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
653 munge_mode_uid_gid(dip, inode);
654 check_and_update_goal(dip);
655 ip->i_goal = dip->i_goal;
656 ip->i_diskflags = 0;
657 ip->i_eattr = 0;
658 ip->i_height = 0;
659 ip->i_depth = 0;
660 ip->i_entries = 0;
661 ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */
662
663 switch(mode & S_IFMT) {
664 case S_IFREG:
665 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
666 gfs2_tune_get(sdp, gt_new_files_jdata))
667 ip->i_diskflags |= GFS2_DIF_JDATA;
668 gfs2_set_aops(inode);
669 break;
670 case S_IFDIR:
671 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
672 ip->i_diskflags |= GFS2_DIF_JDATA;
673 ip->i_entries = 2;
674 break;
675 }
676
677 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
678 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
679 ip->i_diskflags |= GFS2_DIF_SYSTEM;
680
681 gfs2_set_inode_flags(inode);
682
683 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
684 (dip->i_diskflags & GFS2_DIF_TOPDIR))
685 aflags |= GFS2_AF_ORLOV;
686
687 if (default_acl || acl)
688 blocks++;
689
690 error = alloc_dinode(ip, aflags, &blocks);
691 if (error)
692 goto fail_free_inode;
693
694 gfs2_set_inode_blocks(inode, blocks);
695
696 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
697 if (error)
698 goto fail_free_inode;
699 flush_delayed_work(&ip->i_gl->gl_work);
700 glock_set_object(ip->i_gl, ip);
701
702 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
703 if (error)
704 goto fail_free_inode;
705
706 error = gfs2_trans_begin(sdp, blocks, 0);
707 if (error)
708 goto fail_free_inode;
709
710 if (blocks > 1) {
711 ip->i_eattr = ip->i_no_addr + 1;
712 gfs2_init_xattr(ip);
713 }
714 init_dinode(dip, ip, symname);
715 gfs2_trans_end(sdp);
716
717 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
718 if (error)
719 goto fail_free_inode;
720
721 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
722
723 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
724 if (error)
725 goto fail_gunlock2;
726
727 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
728 gfs2_set_iop(inode);
729 insert_inode_hash(inode);
730
731 free_vfs_inode = 0; /* After this point, the inode is no longer
732 considered free. Any failures need to undo
733 the gfs2 structures. */
734 if (default_acl) {
735 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
736 if (error)
737 goto fail_gunlock3;
738 posix_acl_release(default_acl);
739 default_acl = NULL;
740 }
741 if (acl) {
742 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
743 if (error)
744 goto fail_gunlock3;
745 posix_acl_release(acl);
746 acl = NULL;
747 }
748
749 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
750 &gfs2_initxattrs, NULL);
751 if (error)
752 goto fail_gunlock3;
753
754 error = link_dinode(dip, name, ip, &da);
755 if (error)
756 goto fail_gunlock3;
757
758 mark_inode_dirty(inode);
759 d_instantiate(dentry, inode);
760 /* After instantiate, errors should result in evict which will destroy
761 * both inode and iopen glocks properly. */
762 if (file) {
763 file->f_mode |= FMODE_CREATED;
764 error = finish_open(file, dentry, gfs2_open_common);
765 }
766 gfs2_glock_dq_uninit(ghs);
767 gfs2_glock_dq_uninit(ghs + 1);
768 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
769 gfs2_glock_put(io_gl);
770 return error;
771
772 fail_gunlock3:
773 glock_clear_object(io_gl, ip);
774 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
775 fail_gunlock2:
776 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
777 gfs2_glock_put(io_gl);
778 fail_free_inode:
779 gfs2_qa_put(ip);
780 if (ip->i_gl) {
781 glock_clear_object(ip->i_gl, ip);
782 gfs2_glock_put(ip->i_gl);
783 }
784 gfs2_rs_delete(ip, NULL);
785 gfs2_qa_put(ip);
786 fail_free_acls:
787 posix_acl_release(default_acl);
788 posix_acl_release(acl);
789 fail_gunlock:
790 gfs2_dir_no_add(&da);
791 gfs2_glock_dq_uninit(ghs);
792 if (!IS_ERR_OR_NULL(inode)) {
793 clear_nlink(inode);
794 if (!free_vfs_inode)
795 mark_inode_dirty(inode);
796 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
797 &GFS2_I(inode)->i_flags);
798 iput(inode);
799 }
800 if (gfs2_holder_initialized(ghs + 1))
801 gfs2_glock_dq_uninit(ghs + 1);
802 fail:
803 gfs2_qa_put(dip);
804 return error;
805 }
806
807 /**
808 * gfs2_create - Create a file
809 * @dir: The directory in which to create the file
810 * @dentry: The dentry of the new file
811 * @mode: The mode of the new file
812 *
813 * Returns: errno
814 */
815
816 static int gfs2_create(struct inode *dir, struct dentry *dentry,
817 umode_t mode, bool excl)
818 {
819 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl);
820 }
821
822 /**
823 * __gfs2_lookup - Look up a filename in a directory and return its inode
824 * @dir: The directory inode
825 * @dentry: The dentry of the new inode
826 * @file: File to be opened
827 *
828 *
829 * Returns: errno
830 */
831
832 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
833 struct file *file)
834 {
835 struct inode *inode;
836 struct dentry *d;
837 struct gfs2_holder gh;
838 struct gfs2_glock *gl;
839 int error;
840
841 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
842 if (inode == NULL) {
843 d_add(dentry, NULL);
844 return NULL;
845 }
846 if (IS_ERR(inode))
847 return ERR_CAST(inode);
848
849 gl = GFS2_I(inode)->i_gl;
850 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
851 if (error) {
852 iput(inode);
853 return ERR_PTR(error);
854 }
855
856 d = d_splice_alias(inode, dentry);
857 if (IS_ERR(d)) {
858 gfs2_glock_dq_uninit(&gh);
859 return d;
860 }
861 if (file && S_ISREG(inode->i_mode))
862 error = finish_open(file, dentry, gfs2_open_common);
863
864 gfs2_glock_dq_uninit(&gh);
865 if (error) {
866 dput(d);
867 return ERR_PTR(error);
868 }
869 return d;
870 }
871
872 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
873 unsigned flags)
874 {
875 return __gfs2_lookup(dir, dentry, NULL);
876 }
877
878 /**
879 * gfs2_link - Link to a file
880 * @old_dentry: The inode to link
881 * @dir: Add link to this directory
882 * @dentry: The name of the link
883 *
884 * Link the inode in "old_dentry" into the directory "dir" with the
885 * name in "dentry".
886 *
887 * Returns: errno
888 */
889
890 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
891 struct dentry *dentry)
892 {
893 struct gfs2_inode *dip = GFS2_I(dir);
894 struct gfs2_sbd *sdp = GFS2_SB(dir);
895 struct inode *inode = d_inode(old_dentry);
896 struct gfs2_inode *ip = GFS2_I(inode);
897 struct gfs2_holder ghs[2];
898 struct buffer_head *dibh;
899 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
900 int error;
901
902 if (S_ISDIR(inode->i_mode))
903 return -EPERM;
904
905 error = gfs2_qa_get(dip);
906 if (error)
907 return error;
908
909 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
910 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
911
912 error = gfs2_glock_nq(ghs); /* parent */
913 if (error)
914 goto out_parent;
915
916 error = gfs2_glock_nq(ghs + 1); /* child */
917 if (error)
918 goto out_child;
919
920 error = -ENOENT;
921 if (inode->i_nlink == 0)
922 goto out_gunlock;
923
924 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
925 if (error)
926 goto out_gunlock;
927
928 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
929 switch (error) {
930 case -ENOENT:
931 break;
932 case 0:
933 error = -EEXIST;
934 default:
935 goto out_gunlock;
936 }
937
938 error = -EINVAL;
939 if (!dip->i_inode.i_nlink)
940 goto out_gunlock;
941 error = -EFBIG;
942 if (dip->i_entries == (u32)-1)
943 goto out_gunlock;
944 error = -EPERM;
945 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
946 goto out_gunlock;
947 error = -EINVAL;
948 if (!ip->i_inode.i_nlink)
949 goto out_gunlock;
950 error = -EMLINK;
951 if (ip->i_inode.i_nlink == (u32)-1)
952 goto out_gunlock;
953
954 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
955 if (error < 0)
956 goto out_gunlock;
957
958 if (da.nr_blocks) {
959 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
960 error = gfs2_quota_lock_check(dip, &ap);
961 if (error)
962 goto out_gunlock;
963
964 error = gfs2_inplace_reserve(dip, &ap);
965 if (error)
966 goto out_gunlock_q;
967
968 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
969 if (error)
970 goto out_ipres;
971 } else {
972 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
973 if (error)
974 goto out_ipres;
975 }
976
977 error = gfs2_meta_inode_buffer(ip, &dibh);
978 if (error)
979 goto out_end_trans;
980
981 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
982 if (error)
983 goto out_brelse;
984
985 gfs2_trans_add_meta(ip->i_gl, dibh);
986 inc_nlink(&ip->i_inode);
987 ip->i_inode.i_ctime = current_time(&ip->i_inode);
988 ihold(inode);
989 d_instantiate(dentry, inode);
990 mark_inode_dirty(inode);
991
992 out_brelse:
993 brelse(dibh);
994 out_end_trans:
995 gfs2_trans_end(sdp);
996 out_ipres:
997 if (da.nr_blocks)
998 gfs2_inplace_release(dip);
999 out_gunlock_q:
1000 if (da.nr_blocks)
1001 gfs2_quota_unlock(dip);
1002 out_gunlock:
1003 gfs2_dir_no_add(&da);
1004 gfs2_glock_dq(ghs + 1);
1005 out_child:
1006 gfs2_glock_dq(ghs);
1007 out_parent:
1008 gfs2_qa_put(ip);
1009 gfs2_holder_uninit(ghs);
1010 gfs2_holder_uninit(ghs + 1);
1011 return error;
1012 }
1013
1014 /*
1015 * gfs2_unlink_ok - check to see that a inode is still in a directory
1016 * @dip: the directory
1017 * @name: the name of the file
1018 * @ip: the inode
1019 *
1020 * Assumes that the lock on (at least) @dip is held.
1021 *
1022 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1023 */
1024
1025 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1026 const struct gfs2_inode *ip)
1027 {
1028 int error;
1029
1030 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1031 return -EPERM;
1032
1033 if ((dip->i_inode.i_mode & S_ISVTX) &&
1034 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1035 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
1036 return -EPERM;
1037
1038 if (IS_APPEND(&dip->i_inode))
1039 return -EPERM;
1040
1041 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
1042 if (error)
1043 return error;
1044
1045 return gfs2_dir_check(&dip->i_inode, name, ip);
1046 }
1047
1048 /**
1049 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1050 * @dip: The parent directory
1051 * @name: The name of the entry in the parent directory
1052 * @inode: The inode to be removed
1053 *
1054 * Called with all the locks and in a transaction. This will only be
1055 * called for a directory after it has been checked to ensure it is empty.
1056 *
1057 * Returns: 0 on success, or an error
1058 */
1059
1060 static int gfs2_unlink_inode(struct gfs2_inode *dip,
1061 const struct dentry *dentry)
1062 {
1063 struct inode *inode = d_inode(dentry);
1064 struct gfs2_inode *ip = GFS2_I(inode);
1065 int error;
1066
1067 error = gfs2_dir_del(dip, dentry);
1068 if (error)
1069 return error;
1070
1071 ip->i_entries = 0;
1072 inode->i_ctime = current_time(inode);
1073 if (S_ISDIR(inode->i_mode))
1074 clear_nlink(inode);
1075 else
1076 drop_nlink(inode);
1077 mark_inode_dirty(inode);
1078 if (inode->i_nlink == 0)
1079 gfs2_unlink_di(inode);
1080 return 0;
1081 }
1082
1083
1084 /**
1085 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1086 * @dir: The inode of the directory containing the inode to unlink
1087 * @dentry: The file itself
1088 *
1089 * This routine uses the type of the inode as a flag to figure out
1090 * whether this is an unlink or an rmdir.
1091 *
1092 * Returns: errno
1093 */
1094
1095 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1096 {
1097 struct gfs2_inode *dip = GFS2_I(dir);
1098 struct gfs2_sbd *sdp = GFS2_SB(dir);
1099 struct inode *inode = d_inode(dentry);
1100 struct gfs2_inode *ip = GFS2_I(inode);
1101 struct gfs2_holder ghs[3];
1102 struct gfs2_rgrpd *rgd;
1103 int error;
1104
1105 error = gfs2_rindex_update(sdp);
1106 if (error)
1107 return error;
1108
1109 error = -EROFS;
1110
1111 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1112 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1113
1114 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1115 if (!rgd)
1116 goto out_inodes;
1117
1118 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1119
1120
1121 error = gfs2_glock_nq(ghs); /* parent */
1122 if (error)
1123 goto out_parent;
1124
1125 error = gfs2_glock_nq(ghs + 1); /* child */
1126 if (error)
1127 goto out_child;
1128
1129 error = -ENOENT;
1130 if (inode->i_nlink == 0)
1131 goto out_rgrp;
1132
1133 if (S_ISDIR(inode->i_mode)) {
1134 error = -ENOTEMPTY;
1135 if (ip->i_entries > 2 || inode->i_nlink > 2)
1136 goto out_rgrp;
1137 }
1138
1139 error = gfs2_glock_nq(ghs + 2); /* rgrp */
1140 if (error)
1141 goto out_rgrp;
1142
1143 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1144 if (error)
1145 goto out_gunlock;
1146
1147 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1148 if (error)
1149 goto out_gunlock;
1150
1151 error = gfs2_unlink_inode(dip, dentry);
1152 gfs2_trans_end(sdp);
1153
1154 out_gunlock:
1155 gfs2_glock_dq(ghs + 2);
1156 out_rgrp:
1157 gfs2_glock_dq(ghs + 1);
1158 out_child:
1159 gfs2_glock_dq(ghs);
1160 out_parent:
1161 gfs2_holder_uninit(ghs + 2);
1162 out_inodes:
1163 gfs2_holder_uninit(ghs + 1);
1164 gfs2_holder_uninit(ghs);
1165 return error;
1166 }
1167
1168 /**
1169 * gfs2_symlink - Create a symlink
1170 * @dir: The directory to create the symlink in
1171 * @dentry: The dentry to put the symlink in
1172 * @symname: The thing which the link points to
1173 *
1174 * Returns: errno
1175 */
1176
1177 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1178 const char *symname)
1179 {
1180 unsigned int size;
1181
1182 size = strlen(symname);
1183 if (size >= gfs2_max_stuffed_size(GFS2_I(dir)))
1184 return -ENAMETOOLONG;
1185
1186 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0);
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 unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir));
1201 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0);
1202 }
1203
1204 /**
1205 * gfs2_mknod - Make a special file
1206 * @dir: The directory in which the special file will reside
1207 * @dentry: The dentry of the special file
1208 * @mode: The mode of the special file
1209 * @dev: The device specification of the special file
1210 *
1211 */
1212
1213 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1214 dev_t dev)
1215 {
1216 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0);
1217 }
1218
1219 /**
1220 * gfs2_atomic_open - Atomically open a file
1221 * @dir: The directory
1222 * @dentry: The proposed new entry
1223 * @file: The proposed new struct file
1224 * @flags: open flags
1225 * @mode: File mode
1226 *
1227 * Returns: error code or 0 for success
1228 */
1229
1230 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1231 struct file *file, unsigned flags,
1232 umode_t mode)
1233 {
1234 struct dentry *d;
1235 bool excl = !!(flags & O_EXCL);
1236
1237 if (!d_in_lookup(dentry))
1238 goto skip_lookup;
1239
1240 d = __gfs2_lookup(dir, dentry, file);
1241 if (IS_ERR(d))
1242 return PTR_ERR(d);
1243 if (d != NULL)
1244 dentry = d;
1245 if (d_really_is_positive(dentry)) {
1246 if (!(file->f_mode & FMODE_OPENED))
1247 return finish_no_open(file, d);
1248 dput(d);
1249 return excl && (flags & O_CREAT) ? -EEXIST : 0;
1250 }
1251
1252 BUG_ON(d != NULL);
1253
1254 skip_lookup:
1255 if (!(flags & O_CREAT))
1256 return -ENOENT;
1257
1258 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl);
1259 }
1260
1261 /*
1262 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1263 * @this: move this
1264 * @to: to here
1265 *
1266 * Follow @to back to the root and make sure we don't encounter @this
1267 * Assumes we already hold the rename lock.
1268 *
1269 * Returns: errno
1270 */
1271
1272 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1273 {
1274 struct inode *dir = &to->i_inode;
1275 struct super_block *sb = dir->i_sb;
1276 struct inode *tmp;
1277 int error = 0;
1278
1279 igrab(dir);
1280
1281 for (;;) {
1282 if (dir == &this->i_inode) {
1283 error = -EINVAL;
1284 break;
1285 }
1286 if (dir == d_inode(sb->s_root)) {
1287 error = 0;
1288 break;
1289 }
1290
1291 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1292 if (!tmp) {
1293 error = -ENOENT;
1294 break;
1295 }
1296 if (IS_ERR(tmp)) {
1297 error = PTR_ERR(tmp);
1298 break;
1299 }
1300
1301 iput(dir);
1302 dir = tmp;
1303 }
1304
1305 iput(dir);
1306
1307 return error;
1308 }
1309
1310 /**
1311 * update_moved_ino - Update an inode that's being moved
1312 * @ip: The inode being moved
1313 * @ndip: The parent directory of the new filename
1314 * @dir_rename: True of ip is a directory
1315 *
1316 * Returns: errno
1317 */
1318
1319 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1320 int dir_rename)
1321 {
1322 if (dir_rename)
1323 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1324
1325 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1326 mark_inode_dirty_sync(&ip->i_inode);
1327 return 0;
1328 }
1329
1330
1331 /**
1332 * gfs2_rename - Rename a file
1333 * @odir: Parent directory of old file name
1334 * @odentry: The old dentry of the file
1335 * @ndir: Parent directory of new file name
1336 * @ndentry: The new dentry of the file
1337 *
1338 * Returns: errno
1339 */
1340
1341 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1342 struct inode *ndir, struct dentry *ndentry)
1343 {
1344 struct gfs2_inode *odip = GFS2_I(odir);
1345 struct gfs2_inode *ndip = GFS2_I(ndir);
1346 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1347 struct gfs2_inode *nip = NULL;
1348 struct gfs2_sbd *sdp = GFS2_SB(odir);
1349 struct gfs2_holder ghs[4], r_gh, rd_gh;
1350 struct gfs2_rgrpd *nrgd;
1351 unsigned int num_gh;
1352 int dir_rename = 0;
1353 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1354 unsigned int x;
1355 int error;
1356
1357 gfs2_holder_mark_uninitialized(&r_gh);
1358 gfs2_holder_mark_uninitialized(&rd_gh);
1359 if (d_really_is_positive(ndentry)) {
1360 nip = GFS2_I(d_inode(ndentry));
1361 if (ip == nip)
1362 return 0;
1363 }
1364
1365 error = gfs2_rindex_update(sdp);
1366 if (error)
1367 return error;
1368
1369 error = gfs2_qa_get(ndip);
1370 if (error)
1371 return error;
1372
1373 if (odip != ndip) {
1374 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1375 0, &r_gh);
1376 if (error)
1377 goto out;
1378
1379 if (S_ISDIR(ip->i_inode.i_mode)) {
1380 dir_rename = 1;
1381 /* don't move a directory into its subdir */
1382 error = gfs2_ok_to_move(ip, ndip);
1383 if (error)
1384 goto out_gunlock_r;
1385 }
1386 }
1387
1388 num_gh = 1;
1389 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs);
1390 if (odip != ndip) {
1391 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC,
1392 ghs + num_gh);
1393 num_gh++;
1394 }
1395 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1396 num_gh++;
1397
1398 if (nip) {
1399 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC,
1400 ghs + num_gh);
1401 num_gh++;
1402 }
1403
1404 for (x = 0; x < num_gh; x++) {
1405 error = gfs2_glock_nq(ghs + x);
1406 if (error)
1407 goto out_gunlock;
1408 }
1409 error = gfs2_glock_async_wait(num_gh, ghs);
1410 if (error)
1411 goto out_gunlock;
1412
1413 if (nip) {
1414 /* Grab the resource group glock for unlink flag twiddling.
1415 * This is the case where the target dinode already exists
1416 * so we unlink before doing the rename.
1417 */
1418 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1419 if (!nrgd) {
1420 error = -ENOENT;
1421 goto out_gunlock;
1422 }
1423 error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1424 &rd_gh);
1425 if (error)
1426 goto out_gunlock;
1427 }
1428
1429 error = -ENOENT;
1430 if (ip->i_inode.i_nlink == 0)
1431 goto out_gunlock;
1432
1433 /* Check out the old directory */
1434
1435 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1436 if (error)
1437 goto out_gunlock;
1438
1439 /* Check out the new directory */
1440
1441 if (nip) {
1442 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1443 if (error)
1444 goto out_gunlock;
1445
1446 if (nip->i_inode.i_nlink == 0) {
1447 error = -EAGAIN;
1448 goto out_gunlock;
1449 }
1450
1451 if (S_ISDIR(nip->i_inode.i_mode)) {
1452 if (nip->i_entries < 2) {
1453 gfs2_consist_inode(nip);
1454 error = -EIO;
1455 goto out_gunlock;
1456 }
1457 if (nip->i_entries > 2) {
1458 error = -ENOTEMPTY;
1459 goto out_gunlock;
1460 }
1461 }
1462 } else {
1463 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1464 if (error)
1465 goto out_gunlock;
1466
1467 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1468 switch (error) {
1469 case -ENOENT:
1470 error = 0;
1471 break;
1472 case 0:
1473 error = -EEXIST;
1474 default:
1475 goto out_gunlock;
1476 }
1477
1478 if (odip != ndip) {
1479 if (!ndip->i_inode.i_nlink) {
1480 error = -ENOENT;
1481 goto out_gunlock;
1482 }
1483 if (ndip->i_entries == (u32)-1) {
1484 error = -EFBIG;
1485 goto out_gunlock;
1486 }
1487 if (S_ISDIR(ip->i_inode.i_mode) &&
1488 ndip->i_inode.i_nlink == (u32)-1) {
1489 error = -EMLINK;
1490 goto out_gunlock;
1491 }
1492 }
1493 }
1494
1495 /* Check out the dir to be renamed */
1496
1497 if (dir_rename) {
1498 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1499 if (error)
1500 goto out_gunlock;
1501 }
1502
1503 if (nip == NULL) {
1504 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1505 if (error)
1506 goto out_gunlock;
1507 }
1508
1509 if (da.nr_blocks) {
1510 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1511 error = gfs2_quota_lock_check(ndip, &ap);
1512 if (error)
1513 goto out_gunlock;
1514
1515 error = gfs2_inplace_reserve(ndip, &ap);
1516 if (error)
1517 goto out_gunlock_q;
1518
1519 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1520 4 * RES_LEAF + 4, 0);
1521 if (error)
1522 goto out_ipreserv;
1523 } else {
1524 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1525 5 * RES_LEAF + 4, 0);
1526 if (error)
1527 goto out_gunlock;
1528 }
1529
1530 /* Remove the target file, if it exists */
1531
1532 if (nip)
1533 error = gfs2_unlink_inode(ndip, ndentry);
1534
1535 error = update_moved_ino(ip, ndip, dir_rename);
1536 if (error)
1537 goto out_end_trans;
1538
1539 error = gfs2_dir_del(odip, odentry);
1540 if (error)
1541 goto out_end_trans;
1542
1543 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1544 if (error)
1545 goto out_end_trans;
1546
1547 out_end_trans:
1548 gfs2_trans_end(sdp);
1549 out_ipreserv:
1550 if (da.nr_blocks)
1551 gfs2_inplace_release(ndip);
1552 out_gunlock_q:
1553 if (da.nr_blocks)
1554 gfs2_quota_unlock(ndip);
1555 out_gunlock:
1556 gfs2_dir_no_add(&da);
1557 if (gfs2_holder_initialized(&rd_gh))
1558 gfs2_glock_dq_uninit(&rd_gh);
1559
1560 while (x--) {
1561 if (gfs2_holder_queued(ghs + x))
1562 gfs2_glock_dq(ghs + x);
1563 gfs2_holder_uninit(ghs + x);
1564 }
1565 out_gunlock_r:
1566 if (gfs2_holder_initialized(&r_gh))
1567 gfs2_glock_dq_uninit(&r_gh);
1568 out:
1569 gfs2_qa_put(ndip);
1570 return error;
1571 }
1572
1573 /**
1574 * gfs2_exchange - exchange two files
1575 * @odir: Parent directory of old file name
1576 * @odentry: The old dentry of the file
1577 * @ndir: Parent directory of new file name
1578 * @ndentry: The new dentry of the file
1579 * @flags: The rename flags
1580 *
1581 * Returns: errno
1582 */
1583
1584 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1585 struct inode *ndir, struct dentry *ndentry,
1586 unsigned int flags)
1587 {
1588 struct gfs2_inode *odip = GFS2_I(odir);
1589 struct gfs2_inode *ndip = GFS2_I(ndir);
1590 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1591 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1592 struct gfs2_sbd *sdp = GFS2_SB(odir);
1593 struct gfs2_holder ghs[4], r_gh;
1594 unsigned int num_gh;
1595 unsigned int x;
1596 umode_t old_mode = oip->i_inode.i_mode;
1597 umode_t new_mode = nip->i_inode.i_mode;
1598 int error;
1599
1600 gfs2_holder_mark_uninitialized(&r_gh);
1601 error = gfs2_rindex_update(sdp);
1602 if (error)
1603 return error;
1604
1605 if (odip != ndip) {
1606 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1607 0, &r_gh);
1608 if (error)
1609 goto out;
1610
1611 if (S_ISDIR(old_mode)) {
1612 /* don't move a directory into its subdir */
1613 error = gfs2_ok_to_move(oip, ndip);
1614 if (error)
1615 goto out_gunlock_r;
1616 }
1617
1618 if (S_ISDIR(new_mode)) {
1619 /* don't move a directory into its subdir */
1620 error = gfs2_ok_to_move(nip, odip);
1621 if (error)
1622 goto out_gunlock_r;
1623 }
1624 }
1625
1626 num_gh = 1;
1627 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs);
1628 if (odip != ndip) {
1629 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC,
1630 ghs + num_gh);
1631 num_gh++;
1632 }
1633 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1634 num_gh++;
1635
1636 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1637 num_gh++;
1638
1639 for (x = 0; x < num_gh; x++) {
1640 error = gfs2_glock_nq(ghs + x);
1641 if (error)
1642 goto out_gunlock;
1643 }
1644
1645 error = gfs2_glock_async_wait(num_gh, ghs);
1646 if (error)
1647 goto out_gunlock;
1648
1649 error = -ENOENT;
1650 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1651 goto out_gunlock;
1652
1653 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1654 if (error)
1655 goto out_gunlock;
1656 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1657 if (error)
1658 goto out_gunlock;
1659
1660 if (S_ISDIR(old_mode)) {
1661 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1662 if (error)
1663 goto out_gunlock;
1664 }
1665 if (S_ISDIR(new_mode)) {
1666 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1667 if (error)
1668 goto out_gunlock;
1669 }
1670 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1671 if (error)
1672 goto out_gunlock;
1673
1674 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1675 if (error)
1676 goto out_end_trans;
1677
1678 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1679 if (error)
1680 goto out_end_trans;
1681
1682 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1683 IF2DT(old_mode));
1684 if (error)
1685 goto out_end_trans;
1686
1687 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1688 IF2DT(new_mode));
1689 if (error)
1690 goto out_end_trans;
1691
1692 if (odip != ndip) {
1693 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1694 inc_nlink(&odip->i_inode);
1695 drop_nlink(&ndip->i_inode);
1696 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1697 inc_nlink(&ndip->i_inode);
1698 drop_nlink(&odip->i_inode);
1699 }
1700 }
1701 mark_inode_dirty(&ndip->i_inode);
1702 if (odip != ndip)
1703 mark_inode_dirty(&odip->i_inode);
1704
1705 out_end_trans:
1706 gfs2_trans_end(sdp);
1707 out_gunlock:
1708 while (x--) {
1709 if (gfs2_holder_queued(ghs + x))
1710 gfs2_glock_dq(ghs + x);
1711 gfs2_holder_uninit(ghs + x);
1712 }
1713 out_gunlock_r:
1714 if (gfs2_holder_initialized(&r_gh))
1715 gfs2_glock_dq_uninit(&r_gh);
1716 out:
1717 return error;
1718 }
1719
1720 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1721 struct inode *ndir, struct dentry *ndentry,
1722 unsigned int flags)
1723 {
1724 flags &= ~RENAME_NOREPLACE;
1725
1726 if (flags & ~RENAME_EXCHANGE)
1727 return -EINVAL;
1728
1729 if (flags & RENAME_EXCHANGE)
1730 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1731
1732 return gfs2_rename(odir, odentry, ndir, ndentry);
1733 }
1734
1735 /**
1736 * gfs2_get_link - Follow a symbolic link
1737 * @dentry: The dentry of the link
1738 * @inode: The inode of the link
1739 * @done: destructor for return value
1740 *
1741 * This can handle symlinks of any size.
1742 *
1743 * Returns: 0 on success or error code
1744 */
1745
1746 static const char *gfs2_get_link(struct dentry *dentry,
1747 struct inode *inode,
1748 struct delayed_call *done)
1749 {
1750 struct gfs2_inode *ip = GFS2_I(inode);
1751 struct gfs2_holder i_gh;
1752 struct buffer_head *dibh;
1753 unsigned int size;
1754 char *buf;
1755 int error;
1756
1757 if (!dentry)
1758 return ERR_PTR(-ECHILD);
1759
1760 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1761 error = gfs2_glock_nq(&i_gh);
1762 if (error) {
1763 gfs2_holder_uninit(&i_gh);
1764 return ERR_PTR(error);
1765 }
1766
1767 size = (unsigned int)i_size_read(&ip->i_inode);
1768 if (size == 0) {
1769 gfs2_consist_inode(ip);
1770 buf = ERR_PTR(-EIO);
1771 goto out;
1772 }
1773
1774 error = gfs2_meta_inode_buffer(ip, &dibh);
1775 if (error) {
1776 buf = ERR_PTR(error);
1777 goto out;
1778 }
1779
1780 buf = kzalloc(size + 1, GFP_NOFS);
1781 if (!buf)
1782 buf = ERR_PTR(-ENOMEM);
1783 else
1784 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1785 brelse(dibh);
1786 out:
1787 gfs2_glock_dq_uninit(&i_gh);
1788 if (!IS_ERR(buf))
1789 set_delayed_call(done, kfree_link, buf);
1790 return buf;
1791 }
1792
1793 /**
1794 * gfs2_permission -
1795 * @inode: The inode
1796 * @mask: The mask to be tested
1797 * @flags: Indicates whether this is an RCU path walk or not
1798 *
1799 * This may be called from the VFS directly, or from within GFS2 with the
1800 * inode locked, so we look to see if the glock is already locked and only
1801 * lock the glock if its not already been done.
1802 *
1803 * Returns: errno
1804 */
1805
1806 int gfs2_permission(struct inode *inode, int mask)
1807 {
1808 struct gfs2_inode *ip;
1809 struct gfs2_holder i_gh;
1810 int error;
1811
1812 gfs2_holder_mark_uninitialized(&i_gh);
1813 ip = GFS2_I(inode);
1814 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1815 if (mask & MAY_NOT_BLOCK)
1816 return -ECHILD;
1817 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1818 if (error)
1819 return error;
1820 }
1821
1822 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1823 error = -EPERM;
1824 else
1825 error = generic_permission(inode, mask);
1826 if (gfs2_holder_initialized(&i_gh))
1827 gfs2_glock_dq_uninit(&i_gh);
1828
1829 return error;
1830 }
1831
1832 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1833 {
1834 setattr_copy(inode, attr);
1835 mark_inode_dirty(inode);
1836 return 0;
1837 }
1838
1839 /**
1840 * gfs2_setattr_simple -
1841 * @ip:
1842 * @attr:
1843 *
1844 * Returns: errno
1845 */
1846
1847 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1848 {
1849 int error;
1850
1851 if (current->journal_info)
1852 return __gfs2_setattr_simple(inode, attr);
1853
1854 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1855 if (error)
1856 return error;
1857
1858 error = __gfs2_setattr_simple(inode, attr);
1859 gfs2_trans_end(GFS2_SB(inode));
1860 return error;
1861 }
1862
1863 static int setattr_chown(struct inode *inode, struct iattr *attr)
1864 {
1865 struct gfs2_inode *ip = GFS2_I(inode);
1866 struct gfs2_sbd *sdp = GFS2_SB(inode);
1867 kuid_t ouid, nuid;
1868 kgid_t ogid, ngid;
1869 int error;
1870 struct gfs2_alloc_parms ap;
1871
1872 ouid = inode->i_uid;
1873 ogid = inode->i_gid;
1874 nuid = attr->ia_uid;
1875 ngid = attr->ia_gid;
1876
1877 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1878 ouid = nuid = NO_UID_QUOTA_CHANGE;
1879 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1880 ogid = ngid = NO_GID_QUOTA_CHANGE;
1881 error = gfs2_qa_get(ip);
1882 if (error)
1883 return error;
1884
1885 error = gfs2_rindex_update(sdp);
1886 if (error)
1887 goto out;
1888
1889 error = gfs2_quota_lock(ip, nuid, ngid);
1890 if (error)
1891 goto out;
1892
1893 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1894
1895 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1896 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1897 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1898 if (error)
1899 goto out_gunlock_q;
1900 }
1901
1902 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1903 if (error)
1904 goto out_gunlock_q;
1905
1906 error = gfs2_setattr_simple(inode, attr);
1907 if (error)
1908 goto out_end_trans;
1909
1910 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1911 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1912 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1913 gfs2_quota_change(ip, ap.target, nuid, ngid);
1914 }
1915
1916 out_end_trans:
1917 gfs2_trans_end(sdp);
1918 out_gunlock_q:
1919 gfs2_quota_unlock(ip);
1920 out:
1921 gfs2_qa_put(ip);
1922 return error;
1923 }
1924
1925 /**
1926 * gfs2_setattr - Change attributes on an inode
1927 * @dentry: The dentry which is changing
1928 * @attr: The structure describing the change
1929 *
1930 * The VFS layer wants to change one or more of an inodes attributes. Write
1931 * that change out to disk.
1932 *
1933 * Returns: errno
1934 */
1935
1936 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1937 {
1938 struct inode *inode = d_inode(dentry);
1939 struct gfs2_inode *ip = GFS2_I(inode);
1940 struct gfs2_holder i_gh;
1941 int error;
1942
1943 error = gfs2_qa_get(ip);
1944 if (error)
1945 return error;
1946
1947 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1948 if (error)
1949 goto out;
1950
1951 error = -EPERM;
1952 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1953 goto error;
1954
1955 error = setattr_prepare(dentry, attr);
1956 if (error)
1957 goto error;
1958
1959 if (attr->ia_valid & ATTR_SIZE)
1960 error = gfs2_setattr_size(inode, attr->ia_size);
1961 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1962 error = setattr_chown(inode, attr);
1963 else {
1964 error = gfs2_setattr_simple(inode, attr);
1965 if (!error && attr->ia_valid & ATTR_MODE)
1966 error = posix_acl_chmod(inode, inode->i_mode);
1967 }
1968
1969 error:
1970 if (!error)
1971 mark_inode_dirty(inode);
1972 gfs2_glock_dq_uninit(&i_gh);
1973 out:
1974 gfs2_qa_put(ip);
1975 return error;
1976 }
1977
1978 /**
1979 * gfs2_getattr - Read out an inode's attributes
1980 * @path: Object to query
1981 * @stat: The inode's stats
1982 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests
1983 * @flags: AT_STATX_xxx setting
1984 *
1985 * This may be called from the VFS directly, or from within GFS2 with the
1986 * inode locked, so we look to see if the glock is already locked and only
1987 * lock the glock if its not already been done. Note that its the NFS
1988 * readdirplus operation which causes this to be called (from filldir)
1989 * with the glock already held.
1990 *
1991 * Returns: errno
1992 */
1993
1994 static int gfs2_getattr(const struct path *path, struct kstat *stat,
1995 u32 request_mask, unsigned int flags)
1996 {
1997 struct inode *inode = d_inode(path->dentry);
1998 struct gfs2_inode *ip = GFS2_I(inode);
1999 struct gfs2_holder gh;
2000 u32 gfsflags;
2001 int error;
2002
2003 gfs2_holder_mark_uninitialized(&gh);
2004 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
2005 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
2006 if (error)
2007 return error;
2008 }
2009
2010 gfsflags = ip->i_diskflags;
2011 if (gfsflags & GFS2_DIF_APPENDONLY)
2012 stat->attributes |= STATX_ATTR_APPEND;
2013 if (gfsflags & GFS2_DIF_IMMUTABLE)
2014 stat->attributes |= STATX_ATTR_IMMUTABLE;
2015
2016 stat->attributes_mask |= (STATX_ATTR_APPEND |
2017 STATX_ATTR_COMPRESSED |
2018 STATX_ATTR_ENCRYPTED |
2019 STATX_ATTR_IMMUTABLE |
2020 STATX_ATTR_NODUMP);
2021
2022 generic_fillattr(inode, stat);
2023
2024 if (gfs2_holder_initialized(&gh))
2025 gfs2_glock_dq_uninit(&gh);
2026
2027 return 0;
2028 }
2029
2030 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2031 u64 start, u64 len)
2032 {
2033 struct gfs2_inode *ip = GFS2_I(inode);
2034 struct gfs2_holder gh;
2035 int ret;
2036
2037 inode_lock_shared(inode);
2038
2039 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2040 if (ret)
2041 goto out;
2042
2043 ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops);
2044
2045 gfs2_glock_dq_uninit(&gh);
2046
2047 out:
2048 inode_unlock_shared(inode);
2049 return ret;
2050 }
2051
2052 loff_t gfs2_seek_data(struct file *file, loff_t offset)
2053 {
2054 struct inode *inode = file->f_mapping->host;
2055 struct gfs2_inode *ip = GFS2_I(inode);
2056 struct gfs2_holder gh;
2057 loff_t ret;
2058
2059 inode_lock_shared(inode);
2060 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2061 if (!ret)
2062 ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops);
2063 gfs2_glock_dq_uninit(&gh);
2064 inode_unlock_shared(inode);
2065
2066 if (ret < 0)
2067 return ret;
2068 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
2069 }
2070
2071 loff_t gfs2_seek_hole(struct file *file, loff_t offset)
2072 {
2073 struct inode *inode = file->f_mapping->host;
2074 struct gfs2_inode *ip = GFS2_I(inode);
2075 struct gfs2_holder gh;
2076 loff_t ret;
2077
2078 inode_lock_shared(inode);
2079 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2080 if (!ret)
2081 ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops);
2082 gfs2_glock_dq_uninit(&gh);
2083 inode_unlock_shared(inode);
2084
2085 if (ret < 0)
2086 return ret;
2087 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
2088 }
2089
2090 const struct inode_operations gfs2_file_iops = {
2091 .permission = gfs2_permission,
2092 .setattr = gfs2_setattr,
2093 .getattr = gfs2_getattr,
2094 .listxattr = gfs2_listxattr,
2095 .fiemap = gfs2_fiemap,
2096 .get_acl = gfs2_get_acl,
2097 .set_acl = gfs2_set_acl,
2098 };
2099
2100 const struct inode_operations gfs2_dir_iops = {
2101 .create = gfs2_create,
2102 .lookup = gfs2_lookup,
2103 .link = gfs2_link,
2104 .unlink = gfs2_unlink,
2105 .symlink = gfs2_symlink,
2106 .mkdir = gfs2_mkdir,
2107 .rmdir = gfs2_unlink,
2108 .mknod = gfs2_mknod,
2109 .rename = gfs2_rename2,
2110 .permission = gfs2_permission,
2111 .setattr = gfs2_setattr,
2112 .getattr = gfs2_getattr,
2113 .listxattr = gfs2_listxattr,
2114 .fiemap = gfs2_fiemap,
2115 .get_acl = gfs2_get_acl,
2116 .set_acl = gfs2_set_acl,
2117 .atomic_open = gfs2_atomic_open,
2118 };
2119
2120 const struct inode_operations gfs2_symlink_iops = {
2121 .get_link = gfs2_get_link,
2122 .permission = gfs2_permission,
2123 .setattr = gfs2_setattr,
2124 .getattr = gfs2_getattr,
2125 .listxattr = gfs2_listxattr,
2126 .fiemap = gfs2_fiemap,
2127 };
2128
A mirror of Linus' kernel repository