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10#include <linux/slab.h>
11#include <linux/spinlock.h>
12#include <linux/completion.h>
13#include <linux/buffer_head.h>
14#include <linux/namei.h>
15#include <linux/mm.h>
16#include <linux/cred.h>
17#include <linux/xattr.h>
18#include <linux/posix_acl.h>
19#include <linux/gfs2_ondisk.h>
20#include <linux/crc32.h>
21#include <linux/fiemap.h>
22#include <linux/security.h>
23#include <linux/uaccess.h>
24
25#include "gfs2.h"
26#include "incore.h"
27#include "acl.h"
28#include "bmap.h"
29#include "dir.h"
30#include "xattr.h"
31#include "glock.h"
32#include "inode.h"
33#include "meta_io.h"
34#include "quota.h"
35#include "rgrp.h"
36#include "trans.h"
37#include "util.h"
38#include "super.h"
39#include "glops.h"
40
41static int iget_test(struct inode *inode, void *opaque)
42{
43 u64 no_addr = *(u64 *)opaque;
44
45 return GFS2_I(inode)->i_no_addr == no_addr;
46}
47
48static int iget_set(struct inode *inode, void *opaque)
49{
50 u64 no_addr = *(u64 *)opaque;
51
52 GFS2_I(inode)->i_no_addr = no_addr;
53 inode->i_ino = no_addr;
54 return 0;
55}
56
57static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
58{
59 struct inode *inode;
60
61repeat:
62 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr);
63 if (!inode)
64 return inode;
65 if (is_bad_inode(inode)) {
66 iput(inode);
67 goto repeat;
68 }
69 return inode;
70}
71
72
73
74
75
76
77
78
79
80static void gfs2_set_iop(struct inode *inode)
81{
82 struct gfs2_sbd *sdp = GFS2_SB(inode);
83 umode_t mode = inode->i_mode;
84
85 if (S_ISREG(mode)) {
86 inode->i_op = &gfs2_file_iops;
87 if (gfs2_localflocks(sdp))
88 inode->i_fop = &gfs2_file_fops_nolock;
89 else
90 inode->i_fop = &gfs2_file_fops;
91 } else if (S_ISDIR(mode)) {
92 inode->i_op = &gfs2_dir_iops;
93 if (gfs2_localflocks(sdp))
94 inode->i_fop = &gfs2_dir_fops_nolock;
95 else
96 inode->i_fop = &gfs2_dir_fops;
97 } else if (S_ISLNK(mode)) {
98 inode->i_op = &gfs2_symlink_iops;
99 } else {
100 inode->i_op = &gfs2_file_iops;
101 init_special_inode(inode, inode->i_mode, inode->i_rdev);
102 }
103}
104
105
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120
121
122
123struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
124 u64 no_addr, u64 no_formal_ino,
125 unsigned int blktype)
126{
127 struct inode *inode;
128 struct gfs2_inode *ip;
129 struct gfs2_glock *io_gl = NULL;
130 struct gfs2_holder i_gh;
131 int error;
132
133 gfs2_holder_mark_uninitialized(&i_gh);
134 inode = gfs2_iget(sb, no_addr);
135 if (!inode)
136 return ERR_PTR(-ENOMEM);
137
138 ip = GFS2_I(inode);
139
140 if (inode->i_state & I_NEW) {
141 struct gfs2_sbd *sdp = GFS2_SB(inode);
142 ip->i_no_formal_ino = no_formal_ino;
143
144 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
145 if (unlikely(error))
146 goto fail;
147 flush_delayed_work(&ip->i_gl->gl_work);
148
149 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
150 if (unlikely(error))
151 goto fail_put;
152
153 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
154
155
156
157
158
159 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
160 GL_SKIP, &i_gh);
161 if (error)
162 goto fail_put;
163
164 if (blktype != GFS2_BLKST_FREE) {
165 error = gfs2_check_blk_type(sdp, no_addr,
166 blktype);
167 if (error)
168 goto fail_put;
169 }
170 }
171
172 glock_set_object(ip->i_gl, ip);
173 set_bit(GIF_INVALID, &ip->i_flags);
174 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
175 if (unlikely(error))
176 goto fail_put;
177 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
178 gfs2_glock_put(io_gl);
179 io_gl = NULL;
180
181 if (type == DT_UNKNOWN) {
182
183 error = gfs2_inode_refresh(GFS2_I(inode));
184 if (error)
185 goto fail_refresh;
186 } else {
187 inode->i_mode = DT2IF(type);
188 }
189
190 gfs2_set_iop(inode);
191
192 inode->i_atime.tv_sec = 0;
193 inode->i_atime.tv_nsec = 0;
194
195 unlock_new_inode(inode);
196 }
197
198 if (gfs2_holder_initialized(&i_gh))
199 gfs2_glock_dq_uninit(&i_gh);
200 return inode;
201
202fail_refresh:
203 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
204 glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
205 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
206fail_put:
207 if (io_gl)
208 gfs2_glock_put(io_gl);
209 glock_clear_object(ip->i_gl, ip);
210 if (gfs2_holder_initialized(&i_gh))
211 gfs2_glock_dq_uninit(&i_gh);
212fail:
213 iget_failed(inode);
214 return ERR_PTR(error);
215}
216
217struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
218 u64 *no_formal_ino, unsigned int blktype)
219{
220 struct super_block *sb = sdp->sd_vfs;
221 struct inode *inode;
222 int error;
223
224 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype);
225 if (IS_ERR(inode))
226 return inode;
227
228
229 if (no_formal_ino) {
230 error = -ESTALE;
231 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
232 goto fail_iput;
233
234 error = -EIO;
235 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
236 goto fail_iput;
237 }
238 return inode;
239
240fail_iput:
241 iput(inode);
242 return ERR_PTR(error);
243}
244
245
246struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
247{
248 struct qstr qstr;
249 struct inode *inode;
250 gfs2_str2qstr(&qstr, name);
251 inode = gfs2_lookupi(dip, &qstr, 1);
252
253
254
255
256
257 if (inode == NULL)
258 return ERR_PTR(-ENOENT);
259 else
260 return inode;
261}
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278
279struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
280 int is_root)
281{
282 struct super_block *sb = dir->i_sb;
283 struct gfs2_inode *dip = GFS2_I(dir);
284 struct gfs2_holder d_gh;
285 int error = 0;
286 struct inode *inode = NULL;
287
288 gfs2_holder_mark_uninitialized(&d_gh);
289 if (!name->len || name->len > GFS2_FNAMESIZE)
290 return ERR_PTR(-ENAMETOOLONG);
291
292 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
293 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
294 dir == d_inode(sb->s_root))) {
295 igrab(dir);
296 return dir;
297 }
298
299 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
300 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
301 if (error)
302 return ERR_PTR(error);
303 }
304
305 if (!is_root) {
306 error = gfs2_permission(dir, MAY_EXEC);
307 if (error)
308 goto out;
309 }
310
311 inode = gfs2_dir_search(dir, name, false);
312 if (IS_ERR(inode))
313 error = PTR_ERR(inode);
314out:
315 if (gfs2_holder_initialized(&d_gh))
316 gfs2_glock_dq_uninit(&d_gh);
317 if (error == -ENOENT)
318 return NULL;
319 return inode ? inode : ERR_PTR(error);
320}
321
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329
330
331static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
332 umode_t mode)
333{
334 int error;
335
336 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
337 if (error)
338 return error;
339
340
341 if (!dip->i_inode.i_nlink)
342 return -ENOENT;
343
344 if (dip->i_entries == (u32)-1)
345 return -EFBIG;
346 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
347 return -EMLINK;
348
349 return 0;
350}
351
352static void munge_mode_uid_gid(const struct gfs2_inode *dip,
353 struct inode *inode)
354{
355 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
356 (dip->i_inode.i_mode & S_ISUID) &&
357 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
358 if (S_ISDIR(inode->i_mode))
359 inode->i_mode |= S_ISUID;
360 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
361 inode->i_mode &= ~07111;
362 inode->i_uid = dip->i_inode.i_uid;
363 } else
364 inode->i_uid = current_fsuid();
365
366 if (dip->i_inode.i_mode & S_ISGID) {
367 if (S_ISDIR(inode->i_mode))
368 inode->i_mode |= S_ISGID;
369 inode->i_gid = dip->i_inode.i_gid;
370 } else
371 inode->i_gid = current_fsgid();
372}
373
374static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
375{
376 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
377 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
378 int error;
379
380 error = gfs2_quota_lock_check(ip, &ap);
381 if (error)
382 goto out;
383
384 error = gfs2_inplace_reserve(ip, &ap);
385 if (error)
386 goto out_quota;
387
388 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
389 if (error)
390 goto out_ipreserv;
391
392 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
393 ip->i_no_formal_ino = ip->i_generation;
394 ip->i_inode.i_ino = ip->i_no_addr;
395 ip->i_goal = ip->i_no_addr;
396
397 gfs2_trans_end(sdp);
398
399out_ipreserv:
400 gfs2_inplace_release(ip);
401out_quota:
402 gfs2_quota_unlock(ip);
403out:
404 return error;
405}
406
407static void gfs2_init_dir(struct buffer_head *dibh,
408 const struct gfs2_inode *parent)
409{
410 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
411 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
412
413 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
414 dent->de_inum = di->di_num;
415 dent->de_type = cpu_to_be16(DT_DIR);
416
417 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
418 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
419 gfs2_inum_out(parent, dent);
420 dent->de_type = cpu_to_be16(DT_DIR);
421
422}
423
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430
431
432static void gfs2_init_xattr(struct gfs2_inode *ip)
433{
434 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
435 struct buffer_head *bh;
436 struct gfs2_ea_header *ea;
437
438 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
439 gfs2_trans_add_meta(ip->i_gl, bh);
440 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
441 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
442
443 ea = GFS2_EA_BH2FIRST(bh);
444 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
445 ea->ea_type = GFS2_EATYPE_UNUSED;
446 ea->ea_flags = GFS2_EAFLAG_LAST;
447
448 brelse(bh);
449}
450
451
452
453
454
455
456
457
458
459
460static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
461 const char *symname)
462{
463 struct gfs2_dinode *di;
464 struct buffer_head *dibh;
465
466 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
467 gfs2_trans_add_meta(ip->i_gl, dibh);
468 di = (struct gfs2_dinode *)dibh->b_data;
469 gfs2_dinode_out(ip, di);
470
471 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
472 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
473 di->__pad1 = 0;
474 di->__pad2 = 0;
475 di->__pad3 = 0;
476 memset(&di->__pad4, 0, sizeof(di->__pad4));
477 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
478 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
479
480 switch(ip->i_inode.i_mode & S_IFMT) {
481 case S_IFDIR:
482 gfs2_init_dir(dibh, dip);
483 break;
484 case S_IFLNK:
485 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
486 break;
487 }
488
489 set_buffer_uptodate(dibh);
490 brelse(dibh);
491}
492
493
494
495
496
497
498
499
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501
502
503
504
505
506
507static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
508 const struct gfs2_diradd *da,
509 unsigned nr_inodes)
510{
511 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
512 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
513}
514
515static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
516 struct gfs2_inode *ip, struct gfs2_diradd *da)
517{
518 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
519 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
520 int error;
521
522 if (da->nr_blocks) {
523 error = gfs2_quota_lock_check(dip, &ap);
524 if (error)
525 goto fail_quota_locks;
526
527 error = gfs2_inplace_reserve(dip, &ap);
528 if (error)
529 goto fail_quota_locks;
530
531 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
532 if (error)
533 goto fail_ipreserv;
534 } else {
535 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
536 if (error)
537 goto fail_quota_locks;
538 }
539
540 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
541
542 gfs2_trans_end(sdp);
543fail_ipreserv:
544 gfs2_inplace_release(dip);
545fail_quota_locks:
546 gfs2_quota_unlock(dip);
547 return error;
548}
549
550static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
551 void *fs_info)
552{
553 const struct xattr *xattr;
554 int err = 0;
555
556 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
557 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
558 xattr->value_len, 0,
559 GFS2_EATYPE_SECURITY);
560 if (err < 0)
561 break;
562 }
563 return err;
564}
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
580 struct file *file,
581 umode_t mode, dev_t dev, const char *symname,
582 unsigned int size, int excl, int *opened)
583{
584 const struct qstr *name = &dentry->d_name;
585 struct posix_acl *default_acl, *acl;
586 struct gfs2_holder ghs[2];
587 struct inode *inode = NULL;
588 struct gfs2_inode *dip = GFS2_I(dir), *ip;
589 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
590 struct gfs2_glock *io_gl = NULL;
591 int error, free_vfs_inode = 1;
592 u32 aflags = 0;
593 unsigned blocks = 1;
594 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
595
596 if (!name->len || name->len > GFS2_FNAMESIZE)
597 return -ENAMETOOLONG;
598
599 error = gfs2_rsqa_alloc(dip);
600 if (error)
601 return error;
602
603 error = gfs2_rindex_update(sdp);
604 if (error)
605 return error;
606
607 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
608 if (error)
609 goto fail;
610 gfs2_holder_mark_uninitialized(ghs + 1);
611
612 error = create_ok(dip, name, mode);
613 if (error)
614 goto fail_gunlock;
615
616 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
617 error = PTR_ERR(inode);
618 if (!IS_ERR(inode)) {
619 if (S_ISDIR(inode->i_mode)) {
620 iput(inode);
621 inode = ERR_PTR(-EISDIR);
622 goto fail_gunlock;
623 }
624 d_instantiate(dentry, inode);
625 error = 0;
626 if (file) {
627 if (S_ISREG(inode->i_mode))
628 error = finish_open(file, dentry, gfs2_open_common, opened);
629 else
630 error = finish_no_open(file, NULL);
631 }
632 gfs2_glock_dq_uninit(ghs);
633 return error;
634 } else if (error != -ENOENT) {
635 goto fail_gunlock;
636 }
637
638 error = gfs2_diradd_alloc_required(dir, name, &da);
639 if (error < 0)
640 goto fail_gunlock;
641
642 inode = new_inode(sdp->sd_vfs);
643 error = -ENOMEM;
644 if (!inode)
645 goto fail_gunlock;
646
647 error = posix_acl_create(dir, &mode, &default_acl, &acl);
648 if (error)
649 goto fail_gunlock;
650
651 ip = GFS2_I(inode);
652 error = gfs2_rsqa_alloc(ip);
653 if (error)
654 goto fail_free_acls;
655
656 inode->i_mode = mode;
657 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
658 inode->i_rdev = dev;
659 inode->i_size = size;
660 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
661 gfs2_set_inode_blocks(inode, 1);
662 munge_mode_uid_gid(dip, inode);
663 check_and_update_goal(dip);
664 ip->i_goal = dip->i_goal;
665 ip->i_diskflags = 0;
666 ip->i_eattr = 0;
667 ip->i_height = 0;
668 ip->i_depth = 0;
669 ip->i_entries = 0;
670 ip->i_no_addr = 0;
671
672 switch(mode & S_IFMT) {
673 case S_IFREG:
674 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
675 gfs2_tune_get(sdp, gt_new_files_jdata))
676 ip->i_diskflags |= GFS2_DIF_JDATA;
677 gfs2_set_aops(inode);
678 break;
679 case S_IFDIR:
680 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
681 ip->i_diskflags |= GFS2_DIF_JDATA;
682 ip->i_entries = 2;
683 break;
684 }
685
686
687 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
688 ip->i_diskflags |= GFS2_DIF_SYSTEM;
689
690 gfs2_set_inode_flags(inode);
691
692 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
693 (dip->i_diskflags & GFS2_DIF_TOPDIR))
694 aflags |= GFS2_AF_ORLOV;
695
696 if (default_acl || acl)
697 blocks++;
698
699 error = alloc_dinode(ip, aflags, &blocks);
700 if (error)
701 goto fail_free_inode;
702
703 gfs2_set_inode_blocks(inode, blocks);
704
705 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
706 if (error)
707 goto fail_free_inode;
708 flush_delayed_work(&ip->i_gl->gl_work);
709 glock_set_object(ip->i_gl, ip);
710
711 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
712 if (error)
713 goto fail_free_inode;
714
715 error = gfs2_trans_begin(sdp, blocks, 0);
716 if (error)
717 goto fail_gunlock2;
718
719 if (blocks > 1) {
720 ip->i_eattr = ip->i_no_addr + 1;
721 gfs2_init_xattr(ip);
722 }
723 init_dinode(dip, ip, symname);
724 gfs2_trans_end(sdp);
725
726 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
727 if (error)
728 goto fail_gunlock2;
729
730 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
731
732 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
733 if (error)
734 goto fail_gunlock2;
735
736 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
737 gfs2_glock_put(io_gl);
738 gfs2_set_iop(inode);
739 insert_inode_hash(inode);
740
741 free_vfs_inode = 0;
742
743
744 if (default_acl) {
745 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
746 posix_acl_release(default_acl);
747 }
748 if (acl) {
749 if (!error)
750 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
751 posix_acl_release(acl);
752 }
753
754 if (error)
755 goto fail_gunlock3;
756
757 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
758 &gfs2_initxattrs, NULL);
759 if (error)
760 goto fail_gunlock3;
761
762 error = link_dinode(dip, name, ip, &da);
763 if (error)
764 goto fail_gunlock3;
765
766 mark_inode_dirty(inode);
767 d_instantiate(dentry, inode);
768 if (file) {
769 *opened |= FILE_CREATED;
770 error = finish_open(file, dentry, gfs2_open_common, opened);
771 }
772 gfs2_glock_dq_uninit(ghs);
773 gfs2_glock_dq_uninit(ghs + 1);
774 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
775 return error;
776
777fail_gunlock3:
778 glock_clear_object(io_gl, ip);
779 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
780 gfs2_glock_put(io_gl);
781fail_gunlock2:
782 if (io_gl)
783 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
784fail_free_inode:
785 if (ip->i_gl) {
786 glock_clear_object(ip->i_gl, ip);
787 gfs2_glock_put(ip->i_gl);
788 }
789 gfs2_rsqa_delete(ip, NULL);
790fail_free_acls:
791 if (default_acl)
792 posix_acl_release(default_acl);
793 if (acl)
794 posix_acl_release(acl);
795fail_gunlock:
796 gfs2_dir_no_add(&da);
797 gfs2_glock_dq_uninit(ghs);
798 if (inode && !IS_ERR(inode)) {
799 clear_nlink(inode);
800 if (!free_vfs_inode)
801 mark_inode_dirty(inode);
802 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
803 &GFS2_I(inode)->i_flags);
804 iput(inode);
805 }
806 if (gfs2_holder_initialized(ghs + 1))
807 gfs2_glock_dq_uninit(ghs + 1);
808fail:
809 return error;
810}
811
812
813
814
815
816
817
818
819
820
821static int gfs2_create(struct inode *dir, struct dentry *dentry,
822 umode_t mode, bool excl)
823{
824 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL);
825}
826
827
828
829
830
831
832
833
834
835
836
837
838static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
839 struct file *file, int *opened)
840{
841 struct inode *inode;
842 struct dentry *d;
843 struct gfs2_holder gh;
844 struct gfs2_glock *gl;
845 int error;
846
847 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
848 if (inode == NULL) {
849 d_add(dentry, NULL);
850 return NULL;
851 }
852 if (IS_ERR(inode))
853 return ERR_CAST(inode);
854
855 gl = GFS2_I(inode)->i_gl;
856 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
857 if (error) {
858 iput(inode);
859 return ERR_PTR(error);
860 }
861
862 d = d_splice_alias(inode, dentry);
863 if (IS_ERR(d)) {
864 gfs2_glock_dq_uninit(&gh);
865 return d;
866 }
867 if (file && S_ISREG(inode->i_mode))
868 error = finish_open(file, dentry, gfs2_open_common, opened);
869
870 gfs2_glock_dq_uninit(&gh);
871 if (error) {
872 dput(d);
873 return ERR_PTR(error);
874 }
875 return d;
876}
877
878static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
879 unsigned flags)
880{
881 return __gfs2_lookup(dir, dentry, NULL, NULL);
882}
883
884
885
886
887
888
889
890
891
892
893
894
895
896static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
897 struct dentry *dentry)
898{
899 struct gfs2_inode *dip = GFS2_I(dir);
900 struct gfs2_sbd *sdp = GFS2_SB(dir);
901 struct inode *inode = d_inode(old_dentry);
902 struct gfs2_inode *ip = GFS2_I(inode);
903 struct gfs2_holder ghs[2];
904 struct buffer_head *dibh;
905 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
906 int error;
907
908 if (S_ISDIR(inode->i_mode))
909 return -EPERM;
910
911 error = gfs2_rsqa_alloc(dip);
912 if (error)
913 return error;
914
915 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
916 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
917
918 error = gfs2_glock_nq(ghs);
919 if (error)
920 goto out_parent;
921
922 error = gfs2_glock_nq(ghs + 1);
923 if (error)
924 goto out_child;
925
926 error = -ENOENT;
927 if (inode->i_nlink == 0)
928 goto out_gunlock;
929
930 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
931 if (error)
932 goto out_gunlock;
933
934 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
935 switch (error) {
936 case -ENOENT:
937 break;
938 case 0:
939 error = -EEXIST;
940 default:
941 goto out_gunlock;
942 }
943
944 error = -EINVAL;
945 if (!dip->i_inode.i_nlink)
946 goto out_gunlock;
947 error = -EFBIG;
948 if (dip->i_entries == (u32)-1)
949 goto out_gunlock;
950 error = -EPERM;
951 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
952 goto out_gunlock;
953 error = -EINVAL;
954 if (!ip->i_inode.i_nlink)
955 goto out_gunlock;
956 error = -EMLINK;
957 if (ip->i_inode.i_nlink == (u32)-1)
958 goto out_gunlock;
959
960 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
961 if (error < 0)
962 goto out_gunlock;
963
964 if (da.nr_blocks) {
965 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
966 error = gfs2_quota_lock_check(dip, &ap);
967 if (error)
968 goto out_gunlock;
969
970 error = gfs2_inplace_reserve(dip, &ap);
971 if (error)
972 goto out_gunlock_q;
973
974 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
975 if (error)
976 goto out_ipres;
977 } else {
978 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
979 if (error)
980 goto out_ipres;
981 }
982
983 error = gfs2_meta_inode_buffer(ip, &dibh);
984 if (error)
985 goto out_end_trans;
986
987 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
988 if (error)
989 goto out_brelse;
990
991 gfs2_trans_add_meta(ip->i_gl, dibh);
992 inc_nlink(&ip->i_inode);
993 ip->i_inode.i_ctime = current_time(&ip->i_inode);
994 ihold(inode);
995 d_instantiate(dentry, inode);
996 mark_inode_dirty(inode);
997
998out_brelse:
999 brelse(dibh);
1000out_end_trans:
1001 gfs2_trans_end(sdp);
1002out_ipres:
1003 if (da.nr_blocks)
1004 gfs2_inplace_release(dip);
1005out_gunlock_q:
1006 if (da.nr_blocks)
1007 gfs2_quota_unlock(dip);
1008out_gunlock:
1009 gfs2_dir_no_add(&da);
1010 gfs2_glock_dq(ghs + 1);
1011out_child:
1012 gfs2_glock_dq(ghs);
1013out_parent:
1014 gfs2_holder_uninit(ghs);
1015 gfs2_holder_uninit(ghs + 1);
1016 return error;
1017}
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1031 const struct gfs2_inode *ip)
1032{
1033 int error;
1034
1035 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1036 return -EPERM;
1037
1038 if ((dip->i_inode.i_mode & S_ISVTX) &&
1039 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1040 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
1041 return -EPERM;
1042
1043 if (IS_APPEND(&dip->i_inode))
1044 return -EPERM;
1045
1046 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
1047 if (error)
1048 return error;
1049
1050 return gfs2_dir_check(&dip->i_inode, name, ip);
1051}
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065static int gfs2_unlink_inode(struct gfs2_inode *dip,
1066 const struct dentry *dentry)
1067{
1068 struct inode *inode = d_inode(dentry);
1069 struct gfs2_inode *ip = GFS2_I(inode);
1070 int error;
1071
1072 error = gfs2_dir_del(dip, dentry);
1073 if (error)
1074 return error;
1075
1076 ip->i_entries = 0;
1077 inode->i_ctime = current_time(inode);
1078 if (S_ISDIR(inode->i_mode))
1079 clear_nlink(inode);
1080 else
1081 drop_nlink(inode);
1082 mark_inode_dirty(inode);
1083 if (inode->i_nlink == 0)
1084 gfs2_unlink_di(inode);
1085 return 0;
1086}
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1101{
1102 struct gfs2_inode *dip = GFS2_I(dir);
1103 struct gfs2_sbd *sdp = GFS2_SB(dir);
1104 struct inode *inode = d_inode(dentry);
1105 struct gfs2_inode *ip = GFS2_I(inode);
1106 struct gfs2_holder ghs[3];
1107 struct gfs2_rgrpd *rgd;
1108 int error;
1109
1110 error = gfs2_rindex_update(sdp);
1111 if (error)
1112 return error;
1113
1114 error = -EROFS;
1115
1116 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1117 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1118
1119 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1120 if (!rgd)
1121 goto out_inodes;
1122
1123 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1124
1125
1126 error = gfs2_glock_nq(ghs);
1127 if (error)
1128 goto out_parent;
1129
1130 error = gfs2_glock_nq(ghs + 1);
1131 if (error)
1132 goto out_child;
1133
1134 error = -ENOENT;
1135 if (inode->i_nlink == 0)
1136 goto out_rgrp;
1137
1138 if (S_ISDIR(inode->i_mode)) {
1139 error = -ENOTEMPTY;
1140 if (ip->i_entries > 2 || inode->i_nlink > 2)
1141 goto out_rgrp;
1142 }
1143
1144 error = gfs2_glock_nq(ghs + 2);
1145 if (error)
1146 goto out_rgrp;
1147
1148 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1149 if (error)
1150 goto out_gunlock;
1151
1152 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1153 if (error)
1154 goto out_end_trans;
1155
1156 error = gfs2_unlink_inode(dip, dentry);
1157
1158out_end_trans:
1159 gfs2_trans_end(sdp);
1160out_gunlock:
1161 gfs2_glock_dq(ghs + 2);
1162out_rgrp:
1163 gfs2_glock_dq(ghs + 1);
1164out_child:
1165 gfs2_glock_dq(ghs);
1166out_parent:
1167 gfs2_holder_uninit(ghs + 2);
1168out_inodes:
1169 gfs2_holder_uninit(ghs + 1);
1170 gfs2_holder_uninit(ghs);
1171 return error;
1172}
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1184 const char *symname)
1185{
1186 struct gfs2_sbd *sdp = GFS2_SB(dir);
1187 unsigned int size;
1188
1189 size = strlen(symname);
1190 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
1191 return -ENAMETOOLONG;
1192
1193 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL);
1194}
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1206{
1207 struct gfs2_sbd *sdp = GFS2_SB(dir);
1208 unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
1209 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL);
1210}
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1222 dev_t dev)
1223{
1224 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL);
1225}
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1240 struct file *file, unsigned flags,
1241 umode_t mode, int *opened)
1242{
1243 struct dentry *d;
1244 bool excl = !!(flags & O_EXCL);
1245
1246 if (!d_in_lookup(dentry))
1247 goto skip_lookup;
1248
1249 d = __gfs2_lookup(dir, dentry, file, opened);
1250 if (IS_ERR(d))
1251 return PTR_ERR(d);
1252 if (d != NULL)
1253 dentry = d;
1254 if (d_really_is_positive(dentry)) {
1255 if (!(*opened & FILE_OPENED))
1256 return finish_no_open(file, d);
1257 dput(d);
1258 return 0;
1259 }
1260
1261 BUG_ON(d != NULL);
1262
1263skip_lookup:
1264 if (!(flags & O_CREAT))
1265 return -ENOENT;
1266
1267 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened);
1268}
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1282{
1283 struct inode *dir = &to->i_inode;
1284 struct super_block *sb = dir->i_sb;
1285 struct inode *tmp;
1286 int error = 0;
1287
1288 igrab(dir);
1289
1290 for (;;) {
1291 if (dir == &this->i_inode) {
1292 error = -EINVAL;
1293 break;
1294 }
1295 if (dir == d_inode(sb->s_root)) {
1296 error = 0;
1297 break;
1298 }
1299
1300 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1301 if (!tmp) {
1302 error = -ENOENT;
1303 break;
1304 }
1305 if (IS_ERR(tmp)) {
1306 error = PTR_ERR(tmp);
1307 break;
1308 }
1309
1310 iput(dir);
1311 dir = tmp;
1312 }
1313
1314 iput(dir);
1315
1316 return error;
1317}
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1329 int dir_rename)
1330{
1331 int error;
1332 struct buffer_head *dibh;
1333
1334 if (dir_rename)
1335 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1336
1337 error = gfs2_meta_inode_buffer(ip, &dibh);
1338 if (error)
1339 return error;
1340 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1341 gfs2_trans_add_meta(ip->i_gl, dibh);
1342 gfs2_dinode_out(ip, dibh->b_data);
1343 brelse(dibh);
1344 return 0;
1345}
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1359 struct inode *ndir, struct dentry *ndentry)
1360{
1361 struct gfs2_inode *odip = GFS2_I(odir);
1362 struct gfs2_inode *ndip = GFS2_I(ndir);
1363 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1364 struct gfs2_inode *nip = NULL;
1365 struct gfs2_sbd *sdp = GFS2_SB(odir);
1366 struct gfs2_holder ghs[5], r_gh;
1367 struct gfs2_rgrpd *nrgd;
1368 unsigned int num_gh;
1369 int dir_rename = 0;
1370 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1371 unsigned int x;
1372 int error;
1373
1374 gfs2_holder_mark_uninitialized(&r_gh);
1375 if (d_really_is_positive(ndentry)) {
1376 nip = GFS2_I(d_inode(ndentry));
1377 if (ip == nip)
1378 return 0;
1379 }
1380
1381 error = gfs2_rindex_update(sdp);
1382 if (error)
1383 return error;
1384
1385 error = gfs2_rsqa_alloc(ndip);
1386 if (error)
1387 return error;
1388
1389 if (odip != ndip) {
1390 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1391 0, &r_gh);
1392 if (error)
1393 goto out;
1394
1395 if (S_ISDIR(ip->i_inode.i_mode)) {
1396 dir_rename = 1;
1397
1398 error = gfs2_ok_to_move(ip, ndip);
1399 if (error)
1400 goto out_gunlock_r;
1401 }
1402 }
1403
1404 num_gh = 1;
1405 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1406 if (odip != ndip) {
1407 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1408 num_gh++;
1409 }
1410 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1411 num_gh++;
1412
1413 if (nip) {
1414 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1415 num_gh++;
1416
1417
1418
1419
1420 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1421 if (nrgd)
1422 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
1423 }
1424
1425 for (x = 0; x < num_gh; x++) {
1426 error = gfs2_glock_nq(ghs + x);
1427 if (error)
1428 goto out_gunlock;
1429 }
1430
1431 error = -ENOENT;
1432 if (ip->i_inode.i_nlink == 0)
1433 goto out_gunlock;
1434
1435
1436
1437 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1438 if (error)
1439 goto out_gunlock;
1440
1441
1442
1443 if (nip) {
1444 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1445 if (error)
1446 goto out_gunlock;
1447
1448 if (nip->i_inode.i_nlink == 0) {
1449 error = -EAGAIN;
1450 goto out_gunlock;
1451 }
1452
1453 if (S_ISDIR(nip->i_inode.i_mode)) {
1454 if (nip->i_entries < 2) {
1455 gfs2_consist_inode(nip);
1456 error = -EIO;
1457 goto out_gunlock;
1458 }
1459 if (nip->i_entries > 2) {
1460 error = -ENOTEMPTY;
1461 goto out_gunlock;
1462 }
1463 }
1464 } else {
1465 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1466 if (error)
1467 goto out_gunlock;
1468
1469 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1470 switch (error) {
1471 case -ENOENT:
1472 error = 0;
1473 break;
1474 case 0:
1475 error = -EEXIST;
1476 default:
1477 goto out_gunlock;
1478 };
1479
1480 if (odip != ndip) {
1481 if (!ndip->i_inode.i_nlink) {
1482 error = -ENOENT;
1483 goto out_gunlock;
1484 }
1485 if (ndip->i_entries == (u32)-1) {
1486 error = -EFBIG;
1487 goto out_gunlock;
1488 }
1489 if (S_ISDIR(ip->i_inode.i_mode) &&
1490 ndip->i_inode.i_nlink == (u32)-1) {
1491 error = -EMLINK;
1492 goto out_gunlock;
1493 }
1494 }
1495 }
1496
1497
1498
1499 if (dir_rename) {
1500 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1501 if (error)
1502 goto out_gunlock;
1503 }
1504
1505 if (nip == NULL) {
1506 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1507 if (error)
1508 goto out_gunlock;
1509 }
1510
1511 if (da.nr_blocks) {
1512 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1513 error = gfs2_quota_lock_check(ndip, &ap);
1514 if (error)
1515 goto out_gunlock;
1516
1517 error = gfs2_inplace_reserve(ndip, &ap);
1518 if (error)
1519 goto out_gunlock_q;
1520
1521 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1522 4 * RES_LEAF + 4, 0);
1523 if (error)
1524 goto out_ipreserv;
1525 } else {
1526 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1527 5 * RES_LEAF + 4, 0);
1528 if (error)
1529 goto out_gunlock;
1530 }
1531
1532
1533
1534 if (nip)
1535 error = gfs2_unlink_inode(ndip, ndentry);
1536
1537 error = update_moved_ino(ip, ndip, dir_rename);
1538 if (error)
1539 goto out_end_trans;
1540
1541 error = gfs2_dir_del(odip, odentry);
1542 if (error)
1543 goto out_end_trans;
1544
1545 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1546 if (error)
1547 goto out_end_trans;
1548
1549out_end_trans:
1550 gfs2_trans_end(sdp);
1551out_ipreserv:
1552 if (da.nr_blocks)
1553 gfs2_inplace_release(ndip);
1554out_gunlock_q:
1555 if (da.nr_blocks)
1556 gfs2_quota_unlock(ndip);
1557out_gunlock:
1558 gfs2_dir_no_add(&da);
1559 while (x--) {
1560 gfs2_glock_dq(ghs + x);
1561 gfs2_holder_uninit(ghs + x);
1562 }
1563out_gunlock_r:
1564 if (gfs2_holder_initialized(&r_gh))
1565 gfs2_glock_dq_uninit(&r_gh);
1566out:
1567 return error;
1568}
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1582 struct inode *ndir, struct dentry *ndentry,
1583 unsigned int flags)
1584{
1585 struct gfs2_inode *odip = GFS2_I(odir);
1586 struct gfs2_inode *ndip = GFS2_I(ndir);
1587 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1588 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1589 struct gfs2_sbd *sdp = GFS2_SB(odir);
1590 struct gfs2_holder ghs[5], r_gh;
1591 unsigned int num_gh;
1592 unsigned int x;
1593 umode_t old_mode = oip->i_inode.i_mode;
1594 umode_t new_mode = nip->i_inode.i_mode;
1595 int error;
1596
1597 gfs2_holder_mark_uninitialized(&r_gh);
1598 error = gfs2_rindex_update(sdp);
1599 if (error)
1600 return error;
1601
1602 if (odip != ndip) {
1603 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1604 0, &r_gh);
1605 if (error)
1606 goto out;
1607
1608 if (S_ISDIR(old_mode)) {
1609
1610 error = gfs2_ok_to_move(oip, ndip);
1611 if (error)
1612 goto out_gunlock_r;
1613 }
1614
1615 if (S_ISDIR(new_mode)) {
1616
1617 error = gfs2_ok_to_move(nip, odip);
1618 if (error)
1619 goto out_gunlock_r;
1620 }
1621 }
1622
1623 num_gh = 1;
1624 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1625 if (odip != ndip) {
1626 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1627 num_gh++;
1628 }
1629 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1630 num_gh++;
1631
1632 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1633 num_gh++;
1634
1635 for (x = 0; x < num_gh; x++) {
1636 error = gfs2_glock_nq(ghs + x);
1637 if (error)
1638 goto out_gunlock;
1639 }
1640
1641 error = -ENOENT;
1642 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1643 goto out_gunlock;
1644
1645 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1646 if (error)
1647 goto out_gunlock;
1648 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1649 if (error)
1650 goto out_gunlock;
1651
1652 if (S_ISDIR(old_mode)) {
1653 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1654 if (error)
1655 goto out_gunlock;
1656 }
1657 if (S_ISDIR(new_mode)) {
1658 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1659 if (error)
1660 goto out_gunlock;
1661 }
1662 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1663 if (error)
1664 goto out_gunlock;
1665
1666 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1667 if (error)
1668 goto out_end_trans;
1669
1670 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1671 if (error)
1672 goto out_end_trans;
1673
1674 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1675 IF2DT(old_mode));
1676 if (error)
1677 goto out_end_trans;
1678
1679 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1680 IF2DT(new_mode));
1681 if (error)
1682 goto out_end_trans;
1683
1684 if (odip != ndip) {
1685 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1686 inc_nlink(&odip->i_inode);
1687 drop_nlink(&ndip->i_inode);
1688 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1689 inc_nlink(&ndip->i_inode);
1690 drop_nlink(&odip->i_inode);
1691 }
1692 }
1693 mark_inode_dirty(&ndip->i_inode);
1694 if (odip != ndip)
1695 mark_inode_dirty(&odip->i_inode);
1696
1697out_end_trans:
1698 gfs2_trans_end(sdp);
1699out_gunlock:
1700 while (x--) {
1701 gfs2_glock_dq(ghs + x);
1702 gfs2_holder_uninit(ghs + x);
1703 }
1704out_gunlock_r:
1705 if (gfs2_holder_initialized(&r_gh))
1706 gfs2_glock_dq_uninit(&r_gh);
1707out:
1708 return error;
1709}
1710
1711static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1712 struct inode *ndir, struct dentry *ndentry,
1713 unsigned int flags)
1714{
1715 flags &= ~RENAME_NOREPLACE;
1716
1717 if (flags & ~RENAME_EXCHANGE)
1718 return -EINVAL;
1719
1720 if (flags & RENAME_EXCHANGE)
1721 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1722
1723 return gfs2_rename(odir, odentry, ndir, ndentry);
1724}
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737static const char *gfs2_get_link(struct dentry *dentry,
1738 struct inode *inode,
1739 struct delayed_call *done)
1740{
1741 struct gfs2_inode *ip = GFS2_I(inode);
1742 struct gfs2_holder i_gh;
1743 struct buffer_head *dibh;
1744 unsigned int size;
1745 char *buf;
1746 int error;
1747
1748 if (!dentry)
1749 return ERR_PTR(-ECHILD);
1750
1751 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1752 error = gfs2_glock_nq(&i_gh);
1753 if (error) {
1754 gfs2_holder_uninit(&i_gh);
1755 return ERR_PTR(error);
1756 }
1757
1758 size = (unsigned int)i_size_read(&ip->i_inode);
1759 if (size == 0) {
1760 gfs2_consist_inode(ip);
1761 buf = ERR_PTR(-EIO);
1762 goto out;
1763 }
1764
1765 error = gfs2_meta_inode_buffer(ip, &dibh);
1766 if (error) {
1767 buf = ERR_PTR(error);
1768 goto out;
1769 }
1770
1771 buf = kzalloc(size + 1, GFP_NOFS);
1772 if (!buf)
1773 buf = ERR_PTR(-ENOMEM);
1774 else
1775 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1776 brelse(dibh);
1777out:
1778 gfs2_glock_dq_uninit(&i_gh);
1779 if (!IS_ERR(buf))
1780 set_delayed_call(done, kfree_link, buf);
1781 return buf;
1782}
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797int gfs2_permission(struct inode *inode, int mask)
1798{
1799 struct gfs2_inode *ip;
1800 struct gfs2_holder i_gh;
1801 int error;
1802
1803 gfs2_holder_mark_uninitialized(&i_gh);
1804 ip = GFS2_I(inode);
1805 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1806 if (mask & MAY_NOT_BLOCK)
1807 return -ECHILD;
1808 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1809 if (error)
1810 return error;
1811 }
1812
1813 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1814 error = -EPERM;
1815 else
1816 error = generic_permission(inode, mask);
1817 if (gfs2_holder_initialized(&i_gh))
1818 gfs2_glock_dq_uninit(&i_gh);
1819
1820 return error;
1821}
1822
1823static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1824{
1825 setattr_copy(inode, attr);
1826 mark_inode_dirty(inode);
1827 return 0;
1828}
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1839{
1840 int error;
1841
1842 if (current->journal_info)
1843 return __gfs2_setattr_simple(inode, attr);
1844
1845 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1846 if (error)
1847 return error;
1848
1849 error = __gfs2_setattr_simple(inode, attr);
1850 gfs2_trans_end(GFS2_SB(inode));
1851 return error;
1852}
1853
1854static int setattr_chown(struct inode *inode, struct iattr *attr)
1855{
1856 struct gfs2_inode *ip = GFS2_I(inode);
1857 struct gfs2_sbd *sdp = GFS2_SB(inode);
1858 kuid_t ouid, nuid;
1859 kgid_t ogid, ngid;
1860 int error;
1861 struct gfs2_alloc_parms ap;
1862
1863 ouid = inode->i_uid;
1864 ogid = inode->i_gid;
1865 nuid = attr->ia_uid;
1866 ngid = attr->ia_gid;
1867
1868 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1869 ouid = nuid = NO_UID_QUOTA_CHANGE;
1870 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1871 ogid = ngid = NO_GID_QUOTA_CHANGE;
1872
1873 error = gfs2_rsqa_alloc(ip);
1874 if (error)
1875 goto out;
1876
1877 error = gfs2_rindex_update(sdp);
1878 if (error)
1879 goto out;
1880
1881 error = gfs2_quota_lock(ip, nuid, ngid);
1882 if (error)
1883 goto out;
1884
1885 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1886
1887 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1888 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1889 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1890 if (error)
1891 goto out_gunlock_q;
1892 }
1893
1894 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1895 if (error)
1896 goto out_gunlock_q;
1897
1898 error = gfs2_setattr_simple(inode, attr);
1899 if (error)
1900 goto out_end_trans;
1901
1902 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1903 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1904 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1905 gfs2_quota_change(ip, ap.target, nuid, ngid);
1906 }
1907
1908out_end_trans:
1909 gfs2_trans_end(sdp);
1910out_gunlock_q:
1911 gfs2_quota_unlock(ip);
1912out:
1913 return error;
1914}
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1928{
1929 struct inode *inode = d_inode(dentry);
1930 struct gfs2_inode *ip = GFS2_I(inode);
1931 struct gfs2_holder i_gh;
1932 int error;
1933
1934 error = gfs2_rsqa_alloc(ip);
1935 if (error)
1936 return error;
1937
1938 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1939 if (error)
1940 return error;
1941
1942 error = -EPERM;
1943 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1944 goto out;
1945
1946 error = setattr_prepare(dentry, attr);
1947 if (error)
1948 goto out;
1949
1950 if (attr->ia_valid & ATTR_SIZE)
1951 error = gfs2_setattr_size(inode, attr->ia_size);
1952 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1953 error = setattr_chown(inode, attr);
1954 else {
1955 error = gfs2_setattr_simple(inode, attr);
1956 if (!error && attr->ia_valid & ATTR_MODE)
1957 error = posix_acl_chmod(inode, inode->i_mode);
1958 }
1959
1960out:
1961 if (!error)
1962 mark_inode_dirty(inode);
1963 gfs2_glock_dq_uninit(&i_gh);
1964 return error;
1965}
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983static int gfs2_getattr(const struct path *path, struct kstat *stat,
1984 u32 request_mask, unsigned int flags)
1985{
1986 struct inode *inode = d_inode(path->dentry);
1987 struct gfs2_inode *ip = GFS2_I(inode);
1988 struct gfs2_holder gh;
1989 int error;
1990
1991 gfs2_holder_mark_uninitialized(&gh);
1992 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1993 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1994 if (error)
1995 return error;
1996 }
1997
1998 generic_fillattr(inode, stat);
1999 if (gfs2_holder_initialized(&gh))
2000 gfs2_glock_dq_uninit(&gh);
2001
2002 return 0;
2003}
2004
2005static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2006 u64 start, u64 len)
2007{
2008 struct gfs2_inode *ip = GFS2_I(inode);
2009 struct gfs2_holder gh;
2010 int ret;
2011
2012 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
2013 if (ret)
2014 return ret;
2015
2016 inode_lock(inode);
2017
2018 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2019 if (ret)
2020 goto out;
2021
2022 if (gfs2_is_stuffed(ip)) {
2023 u64 phys = ip->i_no_addr << inode->i_blkbits;
2024 u64 size = i_size_read(inode);
2025 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
2026 FIEMAP_EXTENT_DATA_INLINE;
2027 phys += sizeof(struct gfs2_dinode);
2028 phys += start;
2029 if (start + len > size)
2030 len = size - start;
2031 if (start < size)
2032 ret = fiemap_fill_next_extent(fieinfo, start, phys,
2033 len, flags);
2034 if (ret == 1)
2035 ret = 0;
2036 } else {
2037 ret = __generic_block_fiemap(inode, fieinfo, start, len,
2038 gfs2_block_map);
2039 }
2040
2041 gfs2_glock_dq_uninit(&gh);
2042out:
2043 inode_unlock(inode);
2044 return ret;
2045}
2046
2047const struct inode_operations gfs2_file_iops = {
2048 .permission = gfs2_permission,
2049 .setattr = gfs2_setattr,
2050 .getattr = gfs2_getattr,
2051 .listxattr = gfs2_listxattr,
2052 .fiemap = gfs2_fiemap,
2053 .get_acl = gfs2_get_acl,
2054 .set_acl = gfs2_set_acl,
2055};
2056
2057const struct inode_operations gfs2_dir_iops = {
2058 .create = gfs2_create,
2059 .lookup = gfs2_lookup,
2060 .link = gfs2_link,
2061 .unlink = gfs2_unlink,
2062 .symlink = gfs2_symlink,
2063 .mkdir = gfs2_mkdir,
2064 .rmdir = gfs2_unlink,
2065 .mknod = gfs2_mknod,
2066 .rename = gfs2_rename2,
2067 .permission = gfs2_permission,
2068 .setattr = gfs2_setattr,
2069 .getattr = gfs2_getattr,
2070 .listxattr = gfs2_listxattr,
2071 .fiemap = gfs2_fiemap,
2072 .get_acl = gfs2_get_acl,
2073 .set_acl = gfs2_set_acl,
2074 .atomic_open = gfs2_atomic_open,
2075};
2076
2077const struct inode_operations gfs2_symlink_iops = {
2078 .get_link = gfs2_get_link,
2079 .permission = gfs2_permission,
2080 .setattr = gfs2_setattr,
2081 .getattr = gfs2_getattr,
2082 .listxattr = gfs2_listxattr,
2083 .fiemap = gfs2_fiemap,
2084};
2085
2086