fed up with those stupid warnings
[mmotm.git] / fs / gfs2 / inode.c
blob6380cd9314b07ef2885fd5103b02af6dfcb787ad
1 /*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
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 */
10 #include <linux/sched.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/posix_acl.h>
16 #include <linux/sort.h>
17 #include <linux/gfs2_ondisk.h>
18 #include <linux/crc32.h>
19 #include <linux/security.h>
20 #include <linux/time.h>
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 "glops.h"
30 #include "inode.h"
31 #include "log.h"
32 #include "meta_io.h"
33 #include "quota.h"
34 #include "rgrp.h"
35 #include "trans.h"
36 #include "util.h"
38 struct gfs2_inum_range_host {
39 u64 ir_start;
40 u64 ir_length;
43 static int iget_test(struct inode *inode, void *opaque)
45 struct gfs2_inode *ip = GFS2_I(inode);
46 u64 *no_addr = opaque;
48 if (ip->i_no_addr == *no_addr && test_bit(GIF_USER, &ip->i_flags))
49 return 1;
51 return 0;
54 static int iget_set(struct inode *inode, void *opaque)
56 struct gfs2_inode *ip = GFS2_I(inode);
57 u64 *no_addr = opaque;
59 inode->i_ino = (unsigned long)*no_addr;
60 ip->i_no_addr = *no_addr;
61 set_bit(GIF_USER, &ip->i_flags);
62 return 0;
65 struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
67 unsigned long hash = (unsigned long)no_addr;
68 return ilookup5(sb, hash, iget_test, &no_addr);
71 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
73 unsigned long hash = (unsigned long)no_addr;
74 return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
77 struct gfs2_skip_data {
78 u64 no_addr;
79 int skipped;
82 static int iget_skip_test(struct inode *inode, void *opaque)
84 struct gfs2_inode *ip = GFS2_I(inode);
85 struct gfs2_skip_data *data = opaque;
87 if (ip->i_no_addr == data->no_addr && test_bit(GIF_USER, &ip->i_flags)){
88 if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){
89 data->skipped = 1;
90 return 0;
92 return 1;
94 return 0;
97 static int iget_skip_set(struct inode *inode, void *opaque)
99 struct gfs2_inode *ip = GFS2_I(inode);
100 struct gfs2_skip_data *data = opaque;
102 if (data->skipped)
103 return 1;
104 inode->i_ino = (unsigned long)(data->no_addr);
105 ip->i_no_addr = data->no_addr;
106 set_bit(GIF_USER, &ip->i_flags);
107 return 0;
110 static struct inode *gfs2_iget_skip(struct super_block *sb,
111 u64 no_addr)
113 struct gfs2_skip_data data;
114 unsigned long hash = (unsigned long)no_addr;
116 data.no_addr = no_addr;
117 data.skipped = 0;
118 return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data);
122 * GFS2 lookup code fills in vfs inode contents based on info obtained
123 * from directory entry inside gfs2_inode_lookup(). This has caused issues
124 * with NFS code path since its get_dentry routine doesn't have the relevant
125 * directory entry when gfs2_inode_lookup() is invoked. Part of the code
126 * segment inside gfs2_inode_lookup code needs to get moved around.
128 * Clean up I_LOCK and I_NEW as well.
131 void gfs2_set_iop(struct inode *inode)
133 struct gfs2_sbd *sdp = GFS2_SB(inode);
134 umode_t mode = inode->i_mode;
136 if (S_ISREG(mode)) {
137 inode->i_op = &gfs2_file_iops;
138 if (gfs2_localflocks(sdp))
139 inode->i_fop = &gfs2_file_fops_nolock;
140 else
141 inode->i_fop = &gfs2_file_fops;
142 } else if (S_ISDIR(mode)) {
143 inode->i_op = &gfs2_dir_iops;
144 if (gfs2_localflocks(sdp))
145 inode->i_fop = &gfs2_dir_fops_nolock;
146 else
147 inode->i_fop = &gfs2_dir_fops;
148 } else if (S_ISLNK(mode)) {
149 inode->i_op = &gfs2_symlink_iops;
150 } else {
151 inode->i_op = &gfs2_file_iops;
152 init_special_inode(inode, inode->i_mode, inode->i_rdev);
155 unlock_new_inode(inode);
159 * gfs2_inode_lookup - Lookup an inode
160 * @sb: The super block
161 * @no_addr: The inode number
162 * @type: The type of the inode
163 * @skip_freeing: set this not return an inode if it is currently being freed.
165 * Returns: A VFS inode, or an error
168 struct inode *gfs2_inode_lookup(struct super_block *sb,
169 unsigned int type,
170 u64 no_addr,
171 u64 no_formal_ino, int skip_freeing)
173 struct inode *inode;
174 struct gfs2_inode *ip;
175 struct gfs2_glock *io_gl;
176 int error;
178 if (skip_freeing)
179 inode = gfs2_iget_skip(sb, no_addr);
180 else
181 inode = gfs2_iget(sb, no_addr);
182 ip = GFS2_I(inode);
184 if (!inode)
185 return ERR_PTR(-ENOBUFS);
187 if (inode->i_state & I_NEW) {
188 struct gfs2_sbd *sdp = GFS2_SB(inode);
189 ip->i_no_formal_ino = no_formal_ino;
191 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
192 if (unlikely(error))
193 goto fail;
194 ip->i_gl->gl_object = ip;
196 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
197 if (unlikely(error))
198 goto fail_put;
200 set_bit(GIF_INVALID, &ip->i_flags);
201 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
202 if (unlikely(error))
203 goto fail_iopen;
204 ip->i_iopen_gh.gh_gl->gl_object = ip;
206 gfs2_glock_put(io_gl);
208 if ((type == DT_UNKNOWN) && (no_formal_ino == 0))
209 goto gfs2_nfsbypass;
211 inode->i_mode = DT2IF(type);
214 * We must read the inode in order to work out its type in
215 * this case. Note that this doesn't happen often as we normally
216 * know the type beforehand. This code path only occurs during
217 * unlinked inode recovery (where it is safe to do this glock,
218 * which is not true in the general case).
220 if (type == DT_UNKNOWN) {
221 struct gfs2_holder gh;
222 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
223 if (unlikely(error))
224 goto fail_glock;
225 /* Inode is now uptodate */
226 gfs2_glock_dq_uninit(&gh);
229 gfs2_set_iop(inode);
232 gfs2_nfsbypass:
233 return inode;
234 fail_glock:
235 gfs2_glock_dq(&ip->i_iopen_gh);
236 fail_iopen:
237 gfs2_glock_put(io_gl);
238 fail_put:
239 ip->i_gl->gl_object = NULL;
240 gfs2_glock_put(ip->i_gl);
241 fail:
242 iget_failed(inode);
243 return ERR_PTR(error);
246 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
248 const struct gfs2_dinode *str = buf;
249 struct timespec atime;
250 u16 height, depth;
252 if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
253 goto corrupt;
254 ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
255 ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
256 ip->i_inode.i_rdev = 0;
257 switch (ip->i_inode.i_mode & S_IFMT) {
258 case S_IFBLK:
259 case S_IFCHR:
260 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
261 be32_to_cpu(str->di_minor));
262 break;
265 ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
266 ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
268 * We will need to review setting the nlink count here in the
269 * light of the forthcoming ro bind mount work. This is a reminder
270 * to do that.
272 ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
273 ip->i_disksize = be64_to_cpu(str->di_size);
274 i_size_write(&ip->i_inode, ip->i_disksize);
275 gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
276 atime.tv_sec = be64_to_cpu(str->di_atime);
277 atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
278 if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
279 ip->i_inode.i_atime = atime;
280 ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
281 ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
282 ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
283 ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
285 ip->i_goal = be64_to_cpu(str->di_goal_meta);
286 ip->i_generation = be64_to_cpu(str->di_generation);
288 ip->i_diskflags = be32_to_cpu(str->di_flags);
289 gfs2_set_inode_flags(&ip->i_inode);
290 height = be16_to_cpu(str->di_height);
291 if (unlikely(height > GFS2_MAX_META_HEIGHT))
292 goto corrupt;
293 ip->i_height = (u8)height;
295 depth = be16_to_cpu(str->di_depth);
296 if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
297 goto corrupt;
298 ip->i_depth = (u8)depth;
299 ip->i_entries = be32_to_cpu(str->di_entries);
301 ip->i_eattr = be64_to_cpu(str->di_eattr);
302 if (S_ISREG(ip->i_inode.i_mode))
303 gfs2_set_aops(&ip->i_inode);
305 return 0;
306 corrupt:
307 if (gfs2_consist_inode(ip))
308 gfs2_dinode_print(ip);
309 return -EIO;
313 * gfs2_inode_refresh - Refresh the incore copy of the dinode
314 * @ip: The GFS2 inode
316 * Returns: errno
319 int gfs2_inode_refresh(struct gfs2_inode *ip)
321 struct buffer_head *dibh;
322 int error;
324 error = gfs2_meta_inode_buffer(ip, &dibh);
325 if (error)
326 return error;
328 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
329 brelse(dibh);
330 return -EIO;
333 error = gfs2_dinode_in(ip, dibh->b_data);
334 brelse(dibh);
335 clear_bit(GIF_INVALID, &ip->i_flags);
337 return error;
340 int gfs2_dinode_dealloc(struct gfs2_inode *ip)
342 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
343 struct gfs2_alloc *al;
344 struct gfs2_rgrpd *rgd;
345 int error;
347 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
348 if (gfs2_consist_inode(ip))
349 gfs2_dinode_print(ip);
350 return -EIO;
353 al = gfs2_alloc_get(ip);
354 if (!al)
355 return -ENOMEM;
357 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
358 if (error)
359 goto out;
361 error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
362 if (error)
363 goto out_qs;
365 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
366 if (!rgd) {
367 gfs2_consist_inode(ip);
368 error = -EIO;
369 goto out_rindex_relse;
372 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
373 &al->al_rgd_gh);
374 if (error)
375 goto out_rindex_relse;
377 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1);
378 if (error)
379 goto out_rg_gunlock;
381 set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
382 set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags);
384 gfs2_free_di(rgd, ip);
386 gfs2_trans_end(sdp);
388 out_rg_gunlock:
389 gfs2_glock_dq_uninit(&al->al_rgd_gh);
390 out_rindex_relse:
391 gfs2_glock_dq_uninit(&al->al_ri_gh);
392 out_qs:
393 gfs2_quota_unhold(ip);
394 out:
395 gfs2_alloc_put(ip);
396 return error;
400 * gfs2_change_nlink - Change nlink count on inode
401 * @ip: The GFS2 inode
402 * @diff: The change in the nlink count required
404 * Returns: errno
406 int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
408 struct buffer_head *dibh;
409 u32 nlink;
410 int error;
412 BUG_ON(diff != 1 && diff != -1);
413 nlink = ip->i_inode.i_nlink + diff;
415 /* If we are reducing the nlink count, but the new value ends up being
416 bigger than the old one, we must have underflowed. */
417 if (diff < 0 && nlink > ip->i_inode.i_nlink) {
418 if (gfs2_consist_inode(ip))
419 gfs2_dinode_print(ip);
420 return -EIO;
423 error = gfs2_meta_inode_buffer(ip, &dibh);
424 if (error)
425 return error;
427 if (diff > 0)
428 inc_nlink(&ip->i_inode);
429 else
430 drop_nlink(&ip->i_inode);
432 ip->i_inode.i_ctime = CURRENT_TIME;
434 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
435 gfs2_dinode_out(ip, dibh->b_data);
436 brelse(dibh);
437 mark_inode_dirty(&ip->i_inode);
439 if (ip->i_inode.i_nlink == 0)
440 gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
442 return error;
445 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
447 struct qstr qstr;
448 struct inode *inode;
449 gfs2_str2qstr(&qstr, name);
450 inode = gfs2_lookupi(dip, &qstr, 1);
451 /* gfs2_lookupi has inconsistent callers: vfs
452 * related routines expect NULL for no entry found,
453 * gfs2_lookup_simple callers expect ENOENT
454 * and do not check for NULL.
456 if (inode == NULL)
457 return ERR_PTR(-ENOENT);
458 else
459 return inode;
464 * gfs2_lookupi - Look up a filename in a directory and return its inode
465 * @d_gh: An initialized holder for the directory glock
466 * @name: The name of the inode to look for
467 * @is_root: If 1, ignore the caller's permissions
468 * @i_gh: An uninitialized holder for the new inode glock
470 * This can be called via the VFS filldir function when NFS is doing
471 * a readdirplus and the inode which its intending to stat isn't
472 * already in cache. In this case we must not take the directory glock
473 * again, since the readdir call will have already taken that lock.
475 * Returns: errno
478 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
479 int is_root)
481 struct super_block *sb = dir->i_sb;
482 struct gfs2_inode *dip = GFS2_I(dir);
483 struct gfs2_holder d_gh;
484 int error = 0;
485 struct inode *inode = NULL;
486 int unlock = 0;
488 if (!name->len || name->len > GFS2_FNAMESIZE)
489 return ERR_PTR(-ENAMETOOLONG);
491 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
492 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
493 dir == sb->s_root->d_inode)) {
494 igrab(dir);
495 return dir;
498 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
499 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
500 if (error)
501 return ERR_PTR(error);
502 unlock = 1;
505 if (!is_root) {
506 error = gfs2_permission(dir, MAY_EXEC);
507 if (error)
508 goto out;
511 inode = gfs2_dir_search(dir, name);
512 if (IS_ERR(inode))
513 error = PTR_ERR(inode);
514 out:
515 if (unlock)
516 gfs2_glock_dq_uninit(&d_gh);
517 if (error == -ENOENT)
518 return NULL;
519 return inode ? inode : ERR_PTR(error);
523 * create_ok - OK to create a new on-disk inode here?
524 * @dip: Directory in which dinode is to be created
525 * @name: Name of new dinode
526 * @mode:
528 * Returns: errno
531 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
532 unsigned int mode)
534 int error;
536 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
537 if (error)
538 return error;
540 /* Don't create entries in an unlinked directory */
541 if (!dip->i_inode.i_nlink)
542 return -EPERM;
544 error = gfs2_dir_check(&dip->i_inode, name, NULL);
545 switch (error) {
546 case -ENOENT:
547 error = 0;
548 break;
549 case 0:
550 return -EEXIST;
551 default:
552 return error;
555 if (dip->i_entries == (u32)-1)
556 return -EFBIG;
557 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
558 return -EMLINK;
560 return 0;
563 static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
564 unsigned int *uid, unsigned int *gid)
566 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
567 (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) {
568 if (S_ISDIR(*mode))
569 *mode |= S_ISUID;
570 else if (dip->i_inode.i_uid != current_fsuid())
571 *mode &= ~07111;
572 *uid = dip->i_inode.i_uid;
573 } else
574 *uid = current_fsuid();
576 if (dip->i_inode.i_mode & S_ISGID) {
577 if (S_ISDIR(*mode))
578 *mode |= S_ISGID;
579 *gid = dip->i_inode.i_gid;
580 } else
581 *gid = current_fsgid();
584 static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
586 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
587 int error;
589 if (gfs2_alloc_get(dip) == NULL)
590 return -ENOMEM;
592 dip->i_alloc->al_requested = RES_DINODE;
593 error = gfs2_inplace_reserve(dip);
594 if (error)
595 goto out;
597 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0);
598 if (error)
599 goto out_ipreserv;
601 error = gfs2_alloc_di(dip, no_addr, generation);
603 gfs2_trans_end(sdp);
605 out_ipreserv:
606 gfs2_inplace_release(dip);
607 out:
608 gfs2_alloc_put(dip);
609 return error;
613 * init_dinode - Fill in a new dinode structure
614 * @dip: the directory this inode is being created in
615 * @gl: The glock covering the new inode
616 * @inum: the inode number
617 * @mode: the file permissions
618 * @uid:
619 * @gid:
623 static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
624 const struct gfs2_inum_host *inum, unsigned int mode,
625 unsigned int uid, unsigned int gid,
626 const u64 *generation, dev_t dev, struct buffer_head **bhp)
628 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
629 struct gfs2_dinode *di;
630 struct buffer_head *dibh;
631 struct timespec tv = CURRENT_TIME;
633 dibh = gfs2_meta_new(gl, inum->no_addr);
634 gfs2_trans_add_bh(gl, dibh, 1);
635 gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
636 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
637 di = (struct gfs2_dinode *)dibh->b_data;
639 di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
640 di->di_num.no_addr = cpu_to_be64(inum->no_addr);
641 di->di_mode = cpu_to_be32(mode);
642 di->di_uid = cpu_to_be32(uid);
643 di->di_gid = cpu_to_be32(gid);
644 di->di_nlink = 0;
645 di->di_size = 0;
646 di->di_blocks = cpu_to_be64(1);
647 di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
648 di->di_major = cpu_to_be32(MAJOR(dev));
649 di->di_minor = cpu_to_be32(MINOR(dev));
650 di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
651 di->di_generation = cpu_to_be64(*generation);
652 di->di_flags = 0;
654 if (S_ISREG(mode)) {
655 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
656 gfs2_tune_get(sdp, gt_new_files_jdata))
657 di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
658 } else if (S_ISDIR(mode)) {
659 di->di_flags |= cpu_to_be32(dip->i_diskflags &
660 GFS2_DIF_INHERIT_JDATA);
663 di->__pad1 = 0;
664 di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0);
665 di->di_height = 0;
666 di->__pad2 = 0;
667 di->__pad3 = 0;
668 di->di_depth = 0;
669 di->di_entries = 0;
670 memset(&di->__pad4, 0, sizeof(di->__pad4));
671 di->di_eattr = 0;
672 di->di_atime_nsec = cpu_to_be32(tv.tv_nsec);
673 di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
674 di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
675 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
677 set_buffer_uptodate(dibh);
679 *bhp = dibh;
682 static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
683 unsigned int mode, const struct gfs2_inum_host *inum,
684 const u64 *generation, dev_t dev, struct buffer_head **bhp)
686 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
687 unsigned int uid, gid;
688 int error;
690 munge_mode_uid_gid(dip, &mode, &uid, &gid);
691 if (!gfs2_alloc_get(dip))
692 return -ENOMEM;
694 error = gfs2_quota_lock(dip, uid, gid);
695 if (error)
696 goto out;
698 error = gfs2_quota_check(dip, uid, gid);
699 if (error)
700 goto out_quota;
702 error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0);
703 if (error)
704 goto out_quota;
706 init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp);
707 gfs2_quota_change(dip, +1, uid, gid);
708 gfs2_trans_end(sdp);
710 out_quota:
711 gfs2_quota_unlock(dip);
712 out:
713 gfs2_alloc_put(dip);
714 return error;
717 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
718 struct gfs2_inode *ip)
720 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
721 struct gfs2_alloc *al;
722 int alloc_required;
723 struct buffer_head *dibh;
724 int error;
726 al = gfs2_alloc_get(dip);
727 if (!al)
728 return -ENOMEM;
730 error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
731 if (error)
732 goto fail;
734 error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name);
735 if (alloc_required < 0)
736 goto fail_quota_locks;
737 if (alloc_required) {
738 error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid);
739 if (error)
740 goto fail_quota_locks;
742 al->al_requested = sdp->sd_max_dirres;
744 error = gfs2_inplace_reserve(dip);
745 if (error)
746 goto fail_quota_locks;
748 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
749 al->al_rgd->rd_length +
750 2 * RES_DINODE +
751 RES_STATFS + RES_QUOTA, 0);
752 if (error)
753 goto fail_ipreserv;
754 } else {
755 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
756 if (error)
757 goto fail_quota_locks;
760 error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
761 if (error)
762 goto fail_end_trans;
764 error = gfs2_meta_inode_buffer(ip, &dibh);
765 if (error)
766 goto fail_end_trans;
767 ip->i_inode.i_nlink = 1;
768 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
769 gfs2_dinode_out(ip, dibh->b_data);
770 brelse(dibh);
771 return 0;
773 fail_end_trans:
774 gfs2_trans_end(sdp);
776 fail_ipreserv:
777 if (dip->i_alloc->al_rgd)
778 gfs2_inplace_release(dip);
780 fail_quota_locks:
781 gfs2_quota_unlock(dip);
783 fail:
784 gfs2_alloc_put(dip);
785 return error;
788 static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
790 int err;
791 size_t len;
792 void *value;
793 char *name;
795 err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
796 &name, &value, &len);
798 if (err) {
799 if (err == -EOPNOTSUPP)
800 return 0;
801 return err;
804 err = gfs2_xattr_set(&ip->i_inode, GFS2_EATYPE_SECURITY, name, value, len, 0);
805 kfree(value);
806 kfree(name);
808 return err;
812 * gfs2_createi - Create a new inode
813 * @ghs: An array of two holders
814 * @name: The name of the new file
815 * @mode: the permissions on the new inode
817 * @ghs[0] is an initialized holder for the directory
818 * @ghs[1] is the holder for the inode lock
820 * If the return value is not NULL, the glocks on both the directory and the new
821 * file are held. A transaction has been started and an inplace reservation
822 * is held, as well.
824 * Returns: An inode
827 struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
828 unsigned int mode, dev_t dev)
830 struct inode *inode = NULL;
831 struct gfs2_inode *dip = ghs->gh_gl->gl_object;
832 struct inode *dir = &dip->i_inode;
833 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
834 struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
835 int error;
836 u64 generation;
837 struct buffer_head *bh = NULL;
839 if (!name->len || name->len > GFS2_FNAMESIZE)
840 return ERR_PTR(-ENAMETOOLONG);
842 gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
843 error = gfs2_glock_nq(ghs);
844 if (error)
845 goto fail;
847 error = create_ok(dip, name, mode);
848 if (error)
849 goto fail_gunlock;
851 error = alloc_dinode(dip, &inum.no_addr, &generation);
852 if (error)
853 goto fail_gunlock;
854 inum.no_formal_ino = generation;
856 error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
857 LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
858 if (error)
859 goto fail_gunlock;
861 error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh);
862 if (error)
863 goto fail_gunlock2;
865 inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr,
866 inum.no_formal_ino, 0);
867 if (IS_ERR(inode))
868 goto fail_gunlock2;
870 error = gfs2_inode_refresh(GFS2_I(inode));
871 if (error)
872 goto fail_gunlock2;
874 error = gfs2_acl_create(dip, inode);
875 if (error)
876 goto fail_gunlock2;
878 error = gfs2_security_init(dip, GFS2_I(inode));
879 if (error)
880 goto fail_gunlock2;
882 error = link_dinode(dip, name, GFS2_I(inode));
883 if (error)
884 goto fail_gunlock2;
886 if (bh)
887 brelse(bh);
888 return inode;
890 fail_gunlock2:
891 gfs2_glock_dq_uninit(ghs + 1);
892 if (inode && !IS_ERR(inode))
893 iput(inode);
894 fail_gunlock:
895 gfs2_glock_dq(ghs);
896 fail:
897 if (bh)
898 brelse(bh);
899 return ERR_PTR(error);
902 static int __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
904 struct buffer_head *dibh;
905 int error;
907 error = gfs2_meta_inode_buffer(ip, &dibh);
908 if (!error) {
909 error = inode_setattr(&ip->i_inode, attr);
910 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
911 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
912 gfs2_dinode_out(ip, dibh->b_data);
913 brelse(dibh);
915 return error;
919 * gfs2_setattr_simple -
920 * @ip:
921 * @attr:
923 * Called with a reference on the vnode.
925 * Returns: errno
928 int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
930 int error;
932 if (current->journal_info)
933 return __gfs2_setattr_simple(ip, attr);
935 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
936 if (error)
937 return error;
939 error = __gfs2_setattr_simple(ip, attr);
940 gfs2_trans_end(GFS2_SB(&ip->i_inode));
941 return error;
944 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
946 struct gfs2_dinode *str = buf;
948 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
949 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
950 str->di_header.__pad0 = 0;
951 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
952 str->di_header.__pad1 = 0;
953 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
954 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
955 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
956 str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
957 str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
958 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
959 str->di_size = cpu_to_be64(ip->i_disksize);
960 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
961 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
962 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
963 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
965 str->di_goal_meta = cpu_to_be64(ip->i_goal);
966 str->di_goal_data = cpu_to_be64(ip->i_goal);
967 str->di_generation = cpu_to_be64(ip->i_generation);
969 str->di_flags = cpu_to_be32(ip->i_diskflags);
970 str->di_height = cpu_to_be16(ip->i_height);
971 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
972 !(ip->i_diskflags & GFS2_DIF_EXHASH) ?
973 GFS2_FORMAT_DE : 0);
974 str->di_depth = cpu_to_be16(ip->i_depth);
975 str->di_entries = cpu_to_be32(ip->i_entries);
977 str->di_eattr = cpu_to_be64(ip->i_eattr);
978 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
979 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
980 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
983 void gfs2_dinode_print(const struct gfs2_inode *ip)
985 printk(KERN_INFO " no_formal_ino = %llu\n",
986 (unsigned long long)ip->i_no_formal_ino);
987 printk(KERN_INFO " no_addr = %llu\n",
988 (unsigned long long)ip->i_no_addr);
989 printk(KERN_INFO " i_disksize = %llu\n",
990 (unsigned long long)ip->i_disksize);
991 printk(KERN_INFO " blocks = %llu\n",
992 (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode));
993 printk(KERN_INFO " i_goal = %llu\n",
994 (unsigned long long)ip->i_goal);
995 printk(KERN_INFO " i_diskflags = 0x%.8X\n", ip->i_diskflags);
996 printk(KERN_INFO " i_height = %u\n", ip->i_height);
997 printk(KERN_INFO " i_depth = %u\n", ip->i_depth);
998 printk(KERN_INFO " i_entries = %u\n", ip->i_entries);
999 printk(KERN_INFO " i_eattr = %llu\n",
1000 (unsigned long long)ip->i_eattr);