1
2
3
4
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/fiemap.h>
21#include <linux/uaccess.h>
22
23#include "gfs2.h"
24#include "incore.h"
25#include "acl.h"
26#include "bmap.h"
27#include "dir.h"
28#include "xattr.h"
29#include "glock.h"
30#include "inode.h"
31#include "meta_io.h"
32#include "quota.h"
33#include "rgrp.h"
34#include "trans.h"
35#include "util.h"
36#include "super.h"
37#include "glops.h"
38
39static int iget_test(struct inode *inode, void *opaque)
40{
41 u64 no_addr = *(u64 *)opaque;
42
43 return GFS2_I(inode)->i_no_addr == no_addr;
44}
45
46static int iget_set(struct inode *inode, void *opaque)
47{
48 u64 no_addr = *(u64 *)opaque;
49
50 GFS2_I(inode)->i_no_addr = no_addr;
51 inode->i_ino = no_addr;
52 return 0;
53}
54
55static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
56{
57 struct inode *inode;
58
59repeat:
60 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr);
61 if (!inode)
62 return inode;
63 if (is_bad_inode(inode)) {
64 iput(inode);
65 goto repeat;
66 }
67 return inode;
68}
69
70
71
72
73
74
75
76
77
78static void gfs2_set_iop(struct inode *inode)
79{
80 struct gfs2_sbd *sdp = GFS2_SB(inode);
81 umode_t mode = inode->i_mode;
82
83 if (S_ISREG(mode)) {
84 inode->i_op = &gfs2_file_iops;
85 if (gfs2_localflocks(sdp))
86 inode->i_fop = &gfs2_file_fops_nolock;
87 else
88 inode->i_fop = &gfs2_file_fops;
89 } else if (S_ISDIR(mode)) {
90 inode->i_op = &gfs2_dir_iops;
91 if (gfs2_localflocks(sdp))
92 inode->i_fop = &gfs2_dir_fops_nolock;
93 else
94 inode->i_fop = &gfs2_dir_fops;
95 } else if (S_ISLNK(mode)) {
96 inode->i_op = &gfs2_symlink_iops;
97 } else {
98 inode->i_op = &gfs2_file_iops;
99 init_special_inode(inode, inode->i_mode, inode->i_rdev);
100 }
101}
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
126 u64 no_addr, u64 no_formal_ino,
127 unsigned int blktype)
128{
129 struct inode *inode;
130 struct gfs2_inode *ip;
131 struct gfs2_glock *io_gl = NULL;
132 struct gfs2_holder i_gh;
133 int error;
134
135 gfs2_holder_mark_uninitialized(&i_gh);
136 inode = gfs2_iget(sb, no_addr);
137 if (!inode)
138 return ERR_PTR(-ENOMEM);
139
140 ip = GFS2_I(inode);
141
142 if (inode->i_state & I_NEW) {
143 struct gfs2_sbd *sdp = GFS2_SB(inode);
144
145 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
146 if (unlikely(error))
147 goto fail;
148 flush_delayed_work(&ip->i_gl->gl_work);
149
150 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
151 if (unlikely(error))
152 goto fail;
153
154 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
155
156
157
158
159
160 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
161 GL_SKIP, &i_gh);
162 if (error)
163 goto fail;
164
165 error = -ESTALE;
166 if (no_formal_ino &&
167 gfs2_inode_already_deleted(ip->i_gl, no_formal_ino))
168 goto fail;
169
170 if (blktype != GFS2_BLKST_FREE) {
171 error = gfs2_check_blk_type(sdp, no_addr,
172 blktype);
173 if (error)
174 goto fail;
175 }
176 }
177
178 glock_set_object(ip->i_gl, ip);
179 set_bit(GIF_INVALID, &ip->i_flags);
180 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
181 if (unlikely(error))
182 goto fail;
183 gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
184 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
185 gfs2_glock_put(io_gl);
186 io_gl = NULL;
187
188
189 inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1);
190 inode->i_atime.tv_nsec = 0;
191
192 if (type == DT_UNKNOWN) {
193
194 error = gfs2_inode_refresh(GFS2_I(inode));
195 if (error)
196 goto fail;
197 } else {
198 ip->i_no_formal_ino = no_formal_ino;
199 inode->i_mode = DT2IF(type);
200 }
201
202 if (gfs2_holder_initialized(&i_gh))
203 gfs2_glock_dq_uninit(&i_gh);
204
205 gfs2_set_iop(inode);
206 }
207
208 if (no_formal_ino && ip->i_no_formal_ino &&
209 no_formal_ino != ip->i_no_formal_ino) {
210 error = -ESTALE;
211 if (inode->i_state & I_NEW)
212 goto fail;
213 iput(inode);
214 return ERR_PTR(error);
215 }
216
217 if (inode->i_state & I_NEW)
218 unlock_new_inode(inode);
219
220 return inode;
221
222fail:
223 if (io_gl)
224 gfs2_glock_put(io_gl);
225 if (gfs2_holder_initialized(&i_gh))
226 gfs2_glock_dq_uninit(&i_gh);
227 iget_failed(inode);
228 return ERR_PTR(error);
229}
230
231
232
233
234
235
236
237
238struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
239 u64 no_formal_ino, unsigned int blktype)
240{
241 struct super_block *sb = sdp->sd_vfs;
242 struct inode *inode;
243 int error;
244
245 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino,
246 blktype);
247 if (IS_ERR(inode))
248 return inode;
249
250 if (no_formal_ino) {
251 error = -EIO;
252 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
253 goto fail_iput;
254 }
255 return inode;
256
257fail_iput:
258 iput(inode);
259 return ERR_PTR(error);
260}
261
262
263struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
264{
265 struct qstr qstr;
266 struct inode *inode;
267 gfs2_str2qstr(&qstr, name);
268 inode = gfs2_lookupi(dip, &qstr, 1);
269
270
271
272
273
274 if (inode == NULL)
275 return ERR_PTR(-ENOENT);
276 else
277 return inode;
278}
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
297 int is_root)
298{
299 struct super_block *sb = dir->i_sb;
300 struct gfs2_inode *dip = GFS2_I(dir);
301 struct gfs2_holder d_gh;
302 int error = 0;
303 struct inode *inode = NULL;
304
305 gfs2_holder_mark_uninitialized(&d_gh);
306 if (!name->len || name->len > GFS2_FNAMESIZE)
307 return ERR_PTR(-ENAMETOOLONG);
308
309 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
310 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
311 dir == d_inode(sb->s_root))) {
312 igrab(dir);
313 return dir;
314 }
315
316 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
317 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
318 if (error)
319 return ERR_PTR(error);
320 }
321
322 if (!is_root) {
323 error = gfs2_permission(dir, MAY_EXEC);
324 if (error)
325 goto out;
326 }
327
328 inode = gfs2_dir_search(dir, name, false);
329 if (IS_ERR(inode))
330 error = PTR_ERR(inode);
331out:
332 if (gfs2_holder_initialized(&d_gh))
333 gfs2_glock_dq_uninit(&d_gh);
334 if (error == -ENOENT)
335 return NULL;
336 return inode ? inode : ERR_PTR(error);
337}
338
339
340
341
342
343
344
345
346
347
348static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
349 umode_t mode)
350{
351 int error;
352
353 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
354 if (error)
355 return error;
356
357
358 if (!dip->i_inode.i_nlink)
359 return -ENOENT;
360
361 if (dip->i_entries == (u32)-1)
362 return -EFBIG;
363 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
364 return -EMLINK;
365
366 return 0;
367}
368
369static void munge_mode_uid_gid(const struct gfs2_inode *dip,
370 struct inode *inode)
371{
372 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
373 (dip->i_inode.i_mode & S_ISUID) &&
374 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
375 if (S_ISDIR(inode->i_mode))
376 inode->i_mode |= S_ISUID;
377 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
378 inode->i_mode &= ~07111;
379 inode->i_uid = dip->i_inode.i_uid;
380 } else
381 inode->i_uid = current_fsuid();
382
383 if (dip->i_inode.i_mode & S_ISGID) {
384 if (S_ISDIR(inode->i_mode))
385 inode->i_mode |= S_ISGID;
386 inode->i_gid = dip->i_inode.i_gid;
387 } else
388 inode->i_gid = current_fsgid();
389}
390
391static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
392{
393 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
394 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
395 int error;
396
397 error = gfs2_quota_lock_check(ip, &ap);
398 if (error)
399 goto out;
400
401 error = gfs2_inplace_reserve(ip, &ap);
402 if (error)
403 goto out_quota;
404
405 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
406 if (error)
407 goto out_ipreserv;
408
409 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
410 ip->i_no_formal_ino = ip->i_generation;
411 ip->i_inode.i_ino = ip->i_no_addr;
412 ip->i_goal = ip->i_no_addr;
413
414 gfs2_trans_end(sdp);
415
416out_ipreserv:
417 gfs2_inplace_release(ip);
418out_quota:
419 gfs2_quota_unlock(ip);
420out:
421 return error;
422}
423
424static void gfs2_init_dir(struct buffer_head *dibh,
425 const struct gfs2_inode *parent)
426{
427 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
428 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
429
430 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
431 dent->de_inum = di->di_num;
432 dent->de_type = cpu_to_be16(DT_DIR);
433
434 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
435 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
436 gfs2_inum_out(parent, dent);
437 dent->de_type = cpu_to_be16(DT_DIR);
438
439}
440
441
442
443
444
445
446
447
448
449static void gfs2_init_xattr(struct gfs2_inode *ip)
450{
451 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
452 struct buffer_head *bh;
453 struct gfs2_ea_header *ea;
454
455 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
456 gfs2_trans_add_meta(ip->i_gl, bh);
457 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
458 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
459
460 ea = GFS2_EA_BH2FIRST(bh);
461 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
462 ea->ea_type = GFS2_EATYPE_UNUSED;
463 ea->ea_flags = GFS2_EAFLAG_LAST;
464
465 brelse(bh);
466}
467
468
469
470
471
472
473
474
475
476
477static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
478 const char *symname)
479{
480 struct gfs2_dinode *di;
481 struct buffer_head *dibh;
482
483 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
484 gfs2_trans_add_meta(ip->i_gl, dibh);
485 di = (struct gfs2_dinode *)dibh->b_data;
486 gfs2_dinode_out(ip, di);
487
488 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
489 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
490 di->__pad1 = 0;
491 di->__pad2 = 0;
492 di->__pad3 = 0;
493 memset(&di->__pad4, 0, sizeof(di->__pad4));
494 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
495 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
496
497 switch(ip->i_inode.i_mode & S_IFMT) {
498 case S_IFDIR:
499 gfs2_init_dir(dibh, dip);
500 break;
501 case S_IFLNK:
502 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
503 break;
504 }
505
506 set_buffer_uptodate(dibh);
507 brelse(dibh);
508}
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
525 const struct gfs2_diradd *da,
526 unsigned nr_inodes)
527{
528 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
529 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
530}
531
532static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
533 struct gfs2_inode *ip, struct gfs2_diradd *da)
534{
535 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
536 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
537 int error;
538
539 if (da->nr_blocks) {
540 error = gfs2_quota_lock_check(dip, &ap);
541 if (error)
542 goto fail_quota_locks;
543
544 error = gfs2_inplace_reserve(dip, &ap);
545 if (error)
546 goto fail_quota_locks;
547
548 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
549 if (error)
550 goto fail_ipreserv;
551 } else {
552 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
553 if (error)
554 goto fail_quota_locks;
555 }
556
557 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
558
559 gfs2_trans_end(sdp);
560fail_ipreserv:
561 gfs2_inplace_release(dip);
562fail_quota_locks:
563 gfs2_quota_unlock(dip);
564 return error;
565}
566
567static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
568 void *fs_info)
569{
570 const struct xattr *xattr;
571 int err = 0;
572
573 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
574 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
575 xattr->value_len, 0,
576 GFS2_EATYPE_SECURITY);
577 if (err < 0)
578 break;
579 }
580 return err;
581}
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
597 struct file *file,
598 umode_t mode, dev_t dev, const char *symname,
599 unsigned int size, int excl)
600{
601 const struct qstr *name = &dentry->d_name;
602 struct posix_acl *default_acl, *acl;
603 struct gfs2_holder ghs[2];
604 struct inode *inode = NULL;
605 struct gfs2_inode *dip = GFS2_I(dir), *ip;
606 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
607 struct gfs2_glock *io_gl = NULL;
608 int error, free_vfs_inode = 1;
609 u32 aflags = 0;
610 unsigned blocks = 1;
611 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
612
613 if (!name->len || name->len > GFS2_FNAMESIZE)
614 return -ENAMETOOLONG;
615
616 error = gfs2_qa_get(dip);
617 if (error)
618 return error;
619
620 error = gfs2_rindex_update(sdp);
621 if (error)
622 goto fail;
623
624 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
625 if (error)
626 goto fail;
627 gfs2_holder_mark_uninitialized(ghs + 1);
628
629 error = create_ok(dip, name, mode);
630 if (error)
631 goto fail_gunlock;
632
633 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
634 error = PTR_ERR(inode);
635 if (!IS_ERR(inode)) {
636 if (S_ISDIR(inode->i_mode)) {
637 iput(inode);
638 inode = ERR_PTR(-EISDIR);
639 goto fail_gunlock;
640 }
641 d_instantiate(dentry, inode);
642 error = 0;
643 if (file) {
644 if (S_ISREG(inode->i_mode))
645 error = finish_open(file, dentry, gfs2_open_common);
646 else
647 error = finish_no_open(file, NULL);
648 }
649 gfs2_glock_dq_uninit(ghs);
650 goto fail;
651 } else if (error != -ENOENT) {
652 goto fail_gunlock;
653 }
654
655 error = gfs2_diradd_alloc_required(dir, name, &da);
656 if (error < 0)
657 goto fail_gunlock;
658
659 inode = new_inode(sdp->sd_vfs);
660 error = -ENOMEM;
661 if (!inode)
662 goto fail_gunlock;
663
664 error = posix_acl_create(dir, &mode, &default_acl, &acl);
665 if (error)
666 goto fail_gunlock;
667
668 ip = GFS2_I(inode);
669 error = gfs2_qa_get(ip);
670 if (error)
671 goto fail_free_acls;
672
673 inode->i_mode = mode;
674 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
675 inode->i_rdev = dev;
676 inode->i_size = size;
677 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
678 munge_mode_uid_gid(dip, inode);
679 check_and_update_goal(dip);
680 ip->i_goal = dip->i_goal;
681 ip->i_diskflags = 0;
682 ip->i_eattr = 0;
683 ip->i_height = 0;
684 ip->i_depth = 0;
685 ip->i_entries = 0;
686 ip->i_no_addr = 0;
687
688 switch(mode & S_IFMT) {
689 case S_IFREG:
690 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
691 gfs2_tune_get(sdp, gt_new_files_jdata))
692 ip->i_diskflags |= GFS2_DIF_JDATA;
693 gfs2_set_aops(inode);
694 break;
695 case S_IFDIR:
696 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
697 ip->i_diskflags |= GFS2_DIF_JDATA;
698 ip->i_entries = 2;
699 break;
700 }
701
702
703 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
704 ip->i_diskflags |= GFS2_DIF_SYSTEM;
705
706 gfs2_set_inode_flags(inode);
707
708 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
709 (dip->i_diskflags & GFS2_DIF_TOPDIR))
710 aflags |= GFS2_AF_ORLOV;
711
712 if (default_acl || acl)
713 blocks++;
714
715 error = alloc_dinode(ip, aflags, &blocks);
716 if (error)
717 goto fail_free_inode;
718
719 gfs2_set_inode_blocks(inode, blocks);
720
721 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
722 if (error)
723 goto fail_free_inode;
724 flush_delayed_work(&ip->i_gl->gl_work);
725 glock_set_object(ip->i_gl, ip);
726
727 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
728 if (error)
729 goto fail_free_inode;
730
731 error = gfs2_trans_begin(sdp, blocks, 0);
732 if (error)
733 goto fail_free_inode;
734
735 if (blocks > 1) {
736 ip->i_eattr = ip->i_no_addr + 1;
737 gfs2_init_xattr(ip);
738 }
739 init_dinode(dip, ip, symname);
740 gfs2_trans_end(sdp);
741
742 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
743 if (error)
744 goto fail_free_inode;
745
746 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
747
748 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
749 if (error)
750 goto fail_gunlock2;
751
752 gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
753 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
754 gfs2_set_iop(inode);
755 insert_inode_hash(inode);
756
757 free_vfs_inode = 0;
758
759
760 if (default_acl) {
761 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
762 if (error)
763 goto fail_gunlock3;
764 posix_acl_release(default_acl);
765 default_acl = NULL;
766 }
767 if (acl) {
768 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
769 if (error)
770 goto fail_gunlock3;
771 posix_acl_release(acl);
772 acl = NULL;
773 }
774
775 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
776 &gfs2_initxattrs, NULL);
777 if (error)
778 goto fail_gunlock3;
779
780 error = link_dinode(dip, name, ip, &da);
781 if (error)
782 goto fail_gunlock3;
783
784 mark_inode_dirty(inode);
785 d_instantiate(dentry, inode);
786
787
788 if (file) {
789 file->f_mode |= FMODE_CREATED;
790 error = finish_open(file, dentry, gfs2_open_common);
791 }
792 gfs2_glock_dq_uninit(ghs);
793 gfs2_qa_put(ip);
794 gfs2_glock_dq_uninit(ghs + 1);
795 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
796 gfs2_glock_put(io_gl);
797 gfs2_qa_put(dip);
798 return error;
799
800fail_gunlock3:
801 glock_clear_object(io_gl, ip);
802 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
803fail_gunlock2:
804 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
805 gfs2_glock_put(io_gl);
806fail_free_inode:
807 if (ip->i_gl) {
808 glock_clear_object(ip->i_gl, ip);
809 if (free_vfs_inode)
810 gfs2_glock_put(ip->i_gl);
811 }
812 gfs2_rs_delete(ip, NULL);
813 gfs2_qa_put(ip);
814fail_free_acls:
815 posix_acl_release(default_acl);
816 posix_acl_release(acl);
817fail_gunlock:
818 gfs2_dir_no_add(&da);
819 gfs2_glock_dq_uninit(ghs);
820 if (!IS_ERR_OR_NULL(inode)) {
821 clear_nlink(inode);
822 if (!free_vfs_inode)
823 mark_inode_dirty(inode);
824 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
825 &GFS2_I(inode)->i_flags);
826 iput(inode);
827 }
828 if (gfs2_holder_initialized(ghs + 1))
829 gfs2_glock_dq_uninit(ghs + 1);
830fail:
831 gfs2_qa_put(dip);
832 return error;
833}
834
835
836
837
838
839
840
841
842
843
844static int gfs2_create(struct inode *dir, struct dentry *dentry,
845 umode_t mode, bool excl)
846{
847 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl);
848}
849
850
851
852
853
854
855
856
857
858
859
860static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
861 struct file *file)
862{
863 struct inode *inode;
864 struct dentry *d;
865 struct gfs2_holder gh;
866 struct gfs2_glock *gl;
867 int error;
868
869 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
870 if (inode == NULL) {
871 d_add(dentry, NULL);
872 return NULL;
873 }
874 if (IS_ERR(inode))
875 return ERR_CAST(inode);
876
877 gl = GFS2_I(inode)->i_gl;
878 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
879 if (error) {
880 iput(inode);
881 return ERR_PTR(error);
882 }
883
884 d = d_splice_alias(inode, dentry);
885 if (IS_ERR(d)) {
886 gfs2_glock_dq_uninit(&gh);
887 return d;
888 }
889 if (file && S_ISREG(inode->i_mode))
890 error = finish_open(file, dentry, gfs2_open_common);
891
892 gfs2_glock_dq_uninit(&gh);
893 if (error) {
894 dput(d);
895 return ERR_PTR(error);
896 }
897 return d;
898}
899
900static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
901 unsigned flags)
902{
903 return __gfs2_lookup(dir, dentry, NULL);
904}
905
906
907
908
909
910
911
912
913
914
915
916
917
918static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
919 struct dentry *dentry)
920{
921 struct gfs2_inode *dip = GFS2_I(dir);
922 struct gfs2_sbd *sdp = GFS2_SB(dir);
923 struct inode *inode = d_inode(old_dentry);
924 struct gfs2_inode *ip = GFS2_I(inode);
925 struct gfs2_holder ghs[2];
926 struct buffer_head *dibh;
927 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
928 int error;
929
930 if (S_ISDIR(inode->i_mode))
931 return -EPERM;
932
933 error = gfs2_qa_get(dip);
934 if (error)
935 return error;
936
937 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
938 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
939
940 error = gfs2_glock_nq(ghs);
941 if (error)
942 goto out_parent;
943
944 error = gfs2_glock_nq(ghs + 1);
945 if (error)
946 goto out_child;
947
948 error = -ENOENT;
949 if (inode->i_nlink == 0)
950 goto out_gunlock;
951
952 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
953 if (error)
954 goto out_gunlock;
955
956 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
957 switch (error) {
958 case -ENOENT:
959 break;
960 case 0:
961 error = -EEXIST;
962 default:
963 goto out_gunlock;
964 }
965
966 error = -EINVAL;
967 if (!dip->i_inode.i_nlink)
968 goto out_gunlock;
969 error = -EFBIG;
970 if (dip->i_entries == (u32)-1)
971 goto out_gunlock;
972 error = -EPERM;
973 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
974 goto out_gunlock;
975 error = -EINVAL;
976 if (!ip->i_inode.i_nlink)
977 goto out_gunlock;
978 error = -EMLINK;
979 if (ip->i_inode.i_nlink == (u32)-1)
980 goto out_gunlock;
981
982 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
983 if (error < 0)
984 goto out_gunlock;
985
986 if (da.nr_blocks) {
987 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
988 error = gfs2_quota_lock_check(dip, &ap);
989 if (error)
990 goto out_gunlock;
991
992 error = gfs2_inplace_reserve(dip, &ap);
993 if (error)
994 goto out_gunlock_q;
995
996 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
997 if (error)
998 goto out_ipres;
999 } else {
1000 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
1001 if (error)
1002 goto out_ipres;
1003 }
1004
1005 error = gfs2_meta_inode_buffer(ip, &dibh);
1006 if (error)
1007 goto out_end_trans;
1008
1009 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
1010 if (error)
1011 goto out_brelse;
1012
1013 gfs2_trans_add_meta(ip->i_gl, dibh);
1014 inc_nlink(&ip->i_inode);
1015 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1016 ihold(inode);
1017 d_instantiate(dentry, inode);
1018 mark_inode_dirty(inode);
1019
1020out_brelse:
1021 brelse(dibh);
1022out_end_trans:
1023 gfs2_trans_end(sdp);
1024out_ipres:
1025 if (da.nr_blocks)
1026 gfs2_inplace_release(dip);
1027out_gunlock_q:
1028 if (da.nr_blocks)
1029 gfs2_quota_unlock(dip);
1030out_gunlock:
1031 gfs2_dir_no_add(&da);
1032 gfs2_glock_dq(ghs + 1);
1033out_child:
1034 gfs2_glock_dq(ghs);
1035out_parent:
1036 gfs2_qa_put(dip);
1037 gfs2_holder_uninit(ghs);
1038 gfs2_holder_uninit(ghs + 1);
1039 return error;
1040}
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1054 const struct gfs2_inode *ip)
1055{
1056 int error;
1057
1058 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1059 return -EPERM;
1060
1061 if ((dip->i_inode.i_mode & S_ISVTX) &&
1062 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1063 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
1064 return -EPERM;
1065
1066 if (IS_APPEND(&dip->i_inode))
1067 return -EPERM;
1068
1069 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
1070 if (error)
1071 return error;
1072
1073 return gfs2_dir_check(&dip->i_inode, name, ip);
1074}
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088static int gfs2_unlink_inode(struct gfs2_inode *dip,
1089 const struct dentry *dentry)
1090{
1091 struct inode *inode = d_inode(dentry);
1092 struct gfs2_inode *ip = GFS2_I(inode);
1093 int error;
1094
1095 error = gfs2_dir_del(dip, dentry);
1096 if (error)
1097 return error;
1098
1099 ip->i_entries = 0;
1100 inode->i_ctime = current_time(inode);
1101 if (S_ISDIR(inode->i_mode))
1102 clear_nlink(inode);
1103 else
1104 drop_nlink(inode);
1105 mark_inode_dirty(inode);
1106 if (inode->i_nlink == 0)
1107 gfs2_unlink_di(inode);
1108 return 0;
1109}
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1124{
1125 struct gfs2_inode *dip = GFS2_I(dir);
1126 struct gfs2_sbd *sdp = GFS2_SB(dir);
1127 struct inode *inode = d_inode(dentry);
1128 struct gfs2_inode *ip = GFS2_I(inode);
1129 struct gfs2_holder ghs[3];
1130 struct gfs2_rgrpd *rgd;
1131 int error;
1132
1133 error = gfs2_rindex_update(sdp);
1134 if (error)
1135 return error;
1136
1137 error = -EROFS;
1138
1139 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1140 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1141
1142 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1143 if (!rgd)
1144 goto out_inodes;
1145
1146 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1147
1148
1149 error = gfs2_glock_nq(ghs);
1150 if (error)
1151 goto out_parent;
1152
1153 error = gfs2_glock_nq(ghs + 1);
1154 if (error)
1155 goto out_child;
1156
1157 error = -ENOENT;
1158 if (inode->i_nlink == 0)
1159 goto out_rgrp;
1160
1161 if (S_ISDIR(inode->i_mode)) {
1162 error = -ENOTEMPTY;
1163 if (ip->i_entries > 2 || inode->i_nlink > 2)
1164 goto out_rgrp;
1165 }
1166
1167 error = gfs2_glock_nq(ghs + 2);
1168 if (error)
1169 goto out_rgrp;
1170
1171 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1172 if (error)
1173 goto out_gunlock;
1174
1175 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1176 if (error)
1177 goto out_gunlock;
1178
1179 error = gfs2_unlink_inode(dip, dentry);
1180 gfs2_trans_end(sdp);
1181
1182out_gunlock:
1183 gfs2_glock_dq(ghs + 2);
1184out_rgrp:
1185 gfs2_glock_dq(ghs + 1);
1186out_child:
1187 gfs2_glock_dq(ghs);
1188out_parent:
1189 gfs2_holder_uninit(ghs + 2);
1190out_inodes:
1191 gfs2_holder_uninit(ghs + 1);
1192 gfs2_holder_uninit(ghs);
1193 return error;
1194}
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1206 const char *symname)
1207{
1208 unsigned int size;
1209
1210 size = strlen(symname);
1211 if (size >= gfs2_max_stuffed_size(GFS2_I(dir)))
1212 return -ENAMETOOLONG;
1213
1214 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0);
1215}
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1227{
1228 unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir));
1229 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0);
1230}
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1242 dev_t dev)
1243{
1244 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0);
1245}
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1259 struct file *file, unsigned flags,
1260 umode_t mode)
1261{
1262 struct dentry *d;
1263 bool excl = !!(flags & O_EXCL);
1264
1265 if (!d_in_lookup(dentry))
1266 goto skip_lookup;
1267
1268 d = __gfs2_lookup(dir, dentry, file);
1269 if (IS_ERR(d))
1270 return PTR_ERR(d);
1271 if (d != NULL)
1272 dentry = d;
1273 if (d_really_is_positive(dentry)) {
1274 if (!(file->f_mode & FMODE_OPENED))
1275 return finish_no_open(file, d);
1276 dput(d);
1277 return excl && (flags & O_CREAT) ? -EEXIST : 0;
1278 }
1279
1280 BUG_ON(d != NULL);
1281
1282skip_lookup:
1283 if (!(flags & O_CREAT))
1284 return -ENOENT;
1285
1286 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl);
1287}
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1301{
1302 struct inode *dir = &to->i_inode;
1303 struct super_block *sb = dir->i_sb;
1304 struct inode *tmp;
1305 int error = 0;
1306
1307 igrab(dir);
1308
1309 for (;;) {
1310 if (dir == &this->i_inode) {
1311 error = -EINVAL;
1312 break;
1313 }
1314 if (dir == d_inode(sb->s_root)) {
1315 error = 0;
1316 break;
1317 }
1318
1319 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1320 if (!tmp) {
1321 error = -ENOENT;
1322 break;
1323 }
1324 if (IS_ERR(tmp)) {
1325 error = PTR_ERR(tmp);
1326 break;
1327 }
1328
1329 iput(dir);
1330 dir = tmp;
1331 }
1332
1333 iput(dir);
1334
1335 return error;
1336}
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1348 int dir_rename)
1349{
1350 if (dir_rename)
1351 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1352
1353 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1354 mark_inode_dirty_sync(&ip->i_inode);
1355 return 0;
1356}
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1370 struct inode *ndir, struct dentry *ndentry)
1371{
1372 struct gfs2_inode *odip = GFS2_I(odir);
1373 struct gfs2_inode *ndip = GFS2_I(ndir);
1374 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1375 struct gfs2_inode *nip = NULL;
1376 struct gfs2_sbd *sdp = GFS2_SB(odir);
1377 struct gfs2_holder ghs[4], r_gh, rd_gh;
1378 struct gfs2_rgrpd *nrgd;
1379 unsigned int num_gh;
1380 int dir_rename = 0;
1381 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1382 unsigned int x;
1383 int error;
1384
1385 gfs2_holder_mark_uninitialized(&r_gh);
1386 gfs2_holder_mark_uninitialized(&rd_gh);
1387 if (d_really_is_positive(ndentry)) {
1388 nip = GFS2_I(d_inode(ndentry));
1389 if (ip == nip)
1390 return 0;
1391 }
1392
1393 error = gfs2_rindex_update(sdp);
1394 if (error)
1395 return error;
1396
1397 error = gfs2_qa_get(ndip);
1398 if (error)
1399 return error;
1400
1401 if (odip != ndip) {
1402 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1403 0, &r_gh);
1404 if (error)
1405 goto out;
1406
1407 if (S_ISDIR(ip->i_inode.i_mode)) {
1408 dir_rename = 1;
1409
1410 error = gfs2_ok_to_move(ip, ndip);
1411 if (error)
1412 goto out_gunlock_r;
1413 }
1414 }
1415
1416 num_gh = 1;
1417 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs);
1418 if (odip != ndip) {
1419 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC,
1420 ghs + num_gh);
1421 num_gh++;
1422 }
1423 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1424 num_gh++;
1425
1426 if (nip) {
1427 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC,
1428 ghs + num_gh);
1429 num_gh++;
1430 }
1431
1432 for (x = 0; x < num_gh; x++) {
1433 error = gfs2_glock_nq(ghs + x);
1434 if (error)
1435 goto out_gunlock;
1436 }
1437 error = gfs2_glock_async_wait(num_gh, ghs);
1438 if (error)
1439 goto out_gunlock;
1440
1441 if (nip) {
1442
1443
1444
1445
1446 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1447 if (!nrgd) {
1448 error = -ENOENT;
1449 goto out_gunlock;
1450 }
1451 error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1452 &rd_gh);
1453 if (error)
1454 goto out_gunlock;
1455 }
1456
1457 error = -ENOENT;
1458 if (ip->i_inode.i_nlink == 0)
1459 goto out_gunlock;
1460
1461
1462
1463 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1464 if (error)
1465 goto out_gunlock;
1466
1467
1468
1469 if (nip) {
1470 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1471 if (error)
1472 goto out_gunlock;
1473
1474 if (nip->i_inode.i_nlink == 0) {
1475 error = -EAGAIN;
1476 goto out_gunlock;
1477 }
1478
1479 if (S_ISDIR(nip->i_inode.i_mode)) {
1480 if (nip->i_entries < 2) {
1481 gfs2_consist_inode(nip);
1482 error = -EIO;
1483 goto out_gunlock;
1484 }
1485 if (nip->i_entries > 2) {
1486 error = -ENOTEMPTY;
1487 goto out_gunlock;
1488 }
1489 }
1490 } else {
1491 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1492 if (error)
1493 goto out_gunlock;
1494
1495 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1496 switch (error) {
1497 case -ENOENT:
1498 error = 0;
1499 break;
1500 case 0:
1501 error = -EEXIST;
1502 default:
1503 goto out_gunlock;
1504 }
1505
1506 if (odip != ndip) {
1507 if (!ndip->i_inode.i_nlink) {
1508 error = -ENOENT;
1509 goto out_gunlock;
1510 }
1511 if (ndip->i_entries == (u32)-1) {
1512 error = -EFBIG;
1513 goto out_gunlock;
1514 }
1515 if (S_ISDIR(ip->i_inode.i_mode) &&
1516 ndip->i_inode.i_nlink == (u32)-1) {
1517 error = -EMLINK;
1518 goto out_gunlock;
1519 }
1520 }
1521 }
1522
1523
1524
1525 if (dir_rename) {
1526 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1527 if (error)
1528 goto out_gunlock;
1529 }
1530
1531 if (nip == NULL) {
1532 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1533 if (error)
1534 goto out_gunlock;
1535 }
1536
1537 if (da.nr_blocks) {
1538 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1539 error = gfs2_quota_lock_check(ndip, &ap);
1540 if (error)
1541 goto out_gunlock;
1542
1543 error = gfs2_inplace_reserve(ndip, &ap);
1544 if (error)
1545 goto out_gunlock_q;
1546
1547 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1548 4 * RES_LEAF + 4, 0);
1549 if (error)
1550 goto out_ipreserv;
1551 } else {
1552 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1553 5 * RES_LEAF + 4, 0);
1554 if (error)
1555 goto out_gunlock;
1556 }
1557
1558
1559
1560 if (nip)
1561 error = gfs2_unlink_inode(ndip, ndentry);
1562
1563 error = update_moved_ino(ip, ndip, dir_rename);
1564 if (error)
1565 goto out_end_trans;
1566
1567 error = gfs2_dir_del(odip, odentry);
1568 if (error)
1569 goto out_end_trans;
1570
1571 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1572 if (error)
1573 goto out_end_trans;
1574
1575out_end_trans:
1576 gfs2_trans_end(sdp);
1577out_ipreserv:
1578 if (da.nr_blocks)
1579 gfs2_inplace_release(ndip);
1580out_gunlock_q:
1581 if (da.nr_blocks)
1582 gfs2_quota_unlock(ndip);
1583out_gunlock:
1584 gfs2_dir_no_add(&da);
1585 if (gfs2_holder_initialized(&rd_gh))
1586 gfs2_glock_dq_uninit(&rd_gh);
1587
1588 while (x--) {
1589 if (gfs2_holder_queued(ghs + x))
1590 gfs2_glock_dq(ghs + x);
1591 gfs2_holder_uninit(ghs + x);
1592 }
1593out_gunlock_r:
1594 if (gfs2_holder_initialized(&r_gh))
1595 gfs2_glock_dq_uninit(&r_gh);
1596out:
1597 gfs2_qa_put(ndip);
1598 return error;
1599}
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1613 struct inode *ndir, struct dentry *ndentry,
1614 unsigned int flags)
1615{
1616 struct gfs2_inode *odip = GFS2_I(odir);
1617 struct gfs2_inode *ndip = GFS2_I(ndir);
1618 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1619 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1620 struct gfs2_sbd *sdp = GFS2_SB(odir);
1621 struct gfs2_holder ghs[4], r_gh;
1622 unsigned int num_gh;
1623 unsigned int x;
1624 umode_t old_mode = oip->i_inode.i_mode;
1625 umode_t new_mode = nip->i_inode.i_mode;
1626 int error;
1627
1628 gfs2_holder_mark_uninitialized(&r_gh);
1629 error = gfs2_rindex_update(sdp);
1630 if (error)
1631 return error;
1632
1633 if (odip != ndip) {
1634 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1635 0, &r_gh);
1636 if (error)
1637 goto out;
1638
1639 if (S_ISDIR(old_mode)) {
1640
1641 error = gfs2_ok_to_move(oip, ndip);
1642 if (error)
1643 goto out_gunlock_r;
1644 }
1645
1646 if (S_ISDIR(new_mode)) {
1647
1648 error = gfs2_ok_to_move(nip, odip);
1649 if (error)
1650 goto out_gunlock_r;
1651 }
1652 }
1653
1654 num_gh = 1;
1655 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs);
1656 if (odip != ndip) {
1657 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC,
1658 ghs + num_gh);
1659 num_gh++;
1660 }
1661 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1662 num_gh++;
1663
1664 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1665 num_gh++;
1666
1667 for (x = 0; x < num_gh; x++) {
1668 error = gfs2_glock_nq(ghs + x);
1669 if (error)
1670 goto out_gunlock;
1671 }
1672
1673 error = gfs2_glock_async_wait(num_gh, ghs);
1674 if (error)
1675 goto out_gunlock;
1676
1677 error = -ENOENT;
1678 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1679 goto out_gunlock;
1680
1681 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1682 if (error)
1683 goto out_gunlock;
1684 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1685 if (error)
1686 goto out_gunlock;
1687
1688 if (S_ISDIR(old_mode)) {
1689 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1690 if (error)
1691 goto out_gunlock;
1692 }
1693 if (S_ISDIR(new_mode)) {
1694 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1695 if (error)
1696 goto out_gunlock;
1697 }
1698 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1699 if (error)
1700 goto out_gunlock;
1701
1702 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1703 if (error)
1704 goto out_end_trans;
1705
1706 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1707 if (error)
1708 goto out_end_trans;
1709
1710 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1711 IF2DT(old_mode));
1712 if (error)
1713 goto out_end_trans;
1714
1715 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1716 IF2DT(new_mode));
1717 if (error)
1718 goto out_end_trans;
1719
1720 if (odip != ndip) {
1721 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1722 inc_nlink(&odip->i_inode);
1723 drop_nlink(&ndip->i_inode);
1724 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1725 inc_nlink(&ndip->i_inode);
1726 drop_nlink(&odip->i_inode);
1727 }
1728 }
1729 mark_inode_dirty(&ndip->i_inode);
1730 if (odip != ndip)
1731 mark_inode_dirty(&odip->i_inode);
1732
1733out_end_trans:
1734 gfs2_trans_end(sdp);
1735out_gunlock:
1736 while (x--) {
1737 if (gfs2_holder_queued(ghs + x))
1738 gfs2_glock_dq(ghs + x);
1739 gfs2_holder_uninit(ghs + x);
1740 }
1741out_gunlock_r:
1742 if (gfs2_holder_initialized(&r_gh))
1743 gfs2_glock_dq_uninit(&r_gh);
1744out:
1745 return error;
1746}
1747
1748static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1749 struct inode *ndir, struct dentry *ndentry,
1750 unsigned int flags)
1751{
1752 flags &= ~RENAME_NOREPLACE;
1753
1754 if (flags & ~RENAME_EXCHANGE)
1755 return -EINVAL;
1756
1757 if (flags & RENAME_EXCHANGE)
1758 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1759
1760 return gfs2_rename(odir, odentry, ndir, ndentry);
1761}
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774static const char *gfs2_get_link(struct dentry *dentry,
1775 struct inode *inode,
1776 struct delayed_call *done)
1777{
1778 struct gfs2_inode *ip = GFS2_I(inode);
1779 struct gfs2_holder i_gh;
1780 struct buffer_head *dibh;
1781 unsigned int size;
1782 char *buf;
1783 int error;
1784
1785 if (!dentry)
1786 return ERR_PTR(-ECHILD);
1787
1788 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1789 error = gfs2_glock_nq(&i_gh);
1790 if (error) {
1791 gfs2_holder_uninit(&i_gh);
1792 return ERR_PTR(error);
1793 }
1794
1795 size = (unsigned int)i_size_read(&ip->i_inode);
1796 if (size == 0) {
1797 gfs2_consist_inode(ip);
1798 buf = ERR_PTR(-EIO);
1799 goto out;
1800 }
1801
1802 error = gfs2_meta_inode_buffer(ip, &dibh);
1803 if (error) {
1804 buf = ERR_PTR(error);
1805 goto out;
1806 }
1807
1808 buf = kzalloc(size + 1, GFP_NOFS);
1809 if (!buf)
1810 buf = ERR_PTR(-ENOMEM);
1811 else
1812 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1813 brelse(dibh);
1814out:
1815 gfs2_glock_dq_uninit(&i_gh);
1816 if (!IS_ERR(buf))
1817 set_delayed_call(done, kfree_link, buf);
1818 return buf;
1819}
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834int gfs2_permission(struct inode *inode, int mask)
1835{
1836 struct gfs2_inode *ip;
1837 struct gfs2_holder i_gh;
1838 int error;
1839
1840 gfs2_holder_mark_uninitialized(&i_gh);
1841 ip = GFS2_I(inode);
1842 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1843 if (mask & MAY_NOT_BLOCK)
1844 return -ECHILD;
1845 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1846 if (error)
1847 return error;
1848 }
1849
1850 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1851 error = -EPERM;
1852 else
1853 error = generic_permission(inode, mask);
1854 if (gfs2_holder_initialized(&i_gh))
1855 gfs2_glock_dq_uninit(&i_gh);
1856
1857 return error;
1858}
1859
1860static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1861{
1862 setattr_copy(inode, attr);
1863 mark_inode_dirty(inode);
1864 return 0;
1865}
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1876{
1877 int error;
1878
1879 if (current->journal_info)
1880 return __gfs2_setattr_simple(inode, attr);
1881
1882 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1883 if (error)
1884 return error;
1885
1886 error = __gfs2_setattr_simple(inode, attr);
1887 gfs2_trans_end(GFS2_SB(inode));
1888 return error;
1889}
1890
1891static int setattr_chown(struct inode *inode, struct iattr *attr)
1892{
1893 struct gfs2_inode *ip = GFS2_I(inode);
1894 struct gfs2_sbd *sdp = GFS2_SB(inode);
1895 kuid_t ouid, nuid;
1896 kgid_t ogid, ngid;
1897 int error;
1898 struct gfs2_alloc_parms ap;
1899
1900 ouid = inode->i_uid;
1901 ogid = inode->i_gid;
1902 nuid = attr->ia_uid;
1903 ngid = attr->ia_gid;
1904
1905 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1906 ouid = nuid = NO_UID_QUOTA_CHANGE;
1907 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1908 ogid = ngid = NO_GID_QUOTA_CHANGE;
1909 error = gfs2_qa_get(ip);
1910 if (error)
1911 return error;
1912
1913 error = gfs2_rindex_update(sdp);
1914 if (error)
1915 goto out;
1916
1917 error = gfs2_quota_lock(ip, nuid, ngid);
1918 if (error)
1919 goto out;
1920
1921 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1922
1923 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1924 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1925 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1926 if (error)
1927 goto out_gunlock_q;
1928 }
1929
1930 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1931 if (error)
1932 goto out_gunlock_q;
1933
1934 error = gfs2_setattr_simple(inode, attr);
1935 if (error)
1936 goto out_end_trans;
1937
1938 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1939 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1940 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1941 gfs2_quota_change(ip, ap.target, nuid, ngid);
1942 }
1943
1944out_end_trans:
1945 gfs2_trans_end(sdp);
1946out_gunlock_q:
1947 gfs2_quota_unlock(ip);
1948out:
1949 gfs2_qa_put(ip);
1950 return error;
1951}
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1965{
1966 struct inode *inode = d_inode(dentry);
1967 struct gfs2_inode *ip = GFS2_I(inode);
1968 struct gfs2_holder i_gh;
1969 int error;
1970
1971 error = gfs2_qa_get(ip);
1972 if (error)
1973 return error;
1974
1975 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1976 if (error)
1977 goto out;
1978
1979 error = -EPERM;
1980 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1981 goto error;
1982
1983 error = setattr_prepare(dentry, attr);
1984 if (error)
1985 goto error;
1986
1987 if (attr->ia_valid & ATTR_SIZE)
1988 error = gfs2_setattr_size(inode, attr->ia_size);
1989 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1990 error = setattr_chown(inode, attr);
1991 else {
1992 error = gfs2_setattr_simple(inode, attr);
1993 if (!error && attr->ia_valid & ATTR_MODE)
1994 error = posix_acl_chmod(inode, inode->i_mode);
1995 }
1996
1997error:
1998 if (!error)
1999 mark_inode_dirty(inode);
2000 gfs2_glock_dq_uninit(&i_gh);
2001out:
2002 gfs2_qa_put(ip);
2003 return error;
2004}
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022static int gfs2_getattr(const struct path *path, struct kstat *stat,
2023 u32 request_mask, unsigned int flags)
2024{
2025 struct inode *inode = d_inode(path->dentry);
2026 struct gfs2_inode *ip = GFS2_I(inode);
2027 struct gfs2_holder gh;
2028 u32 gfsflags;
2029 int error;
2030
2031 gfs2_holder_mark_uninitialized(&gh);
2032 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
2033 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
2034 if (error)
2035 return error;
2036 }
2037
2038 gfsflags = ip->i_diskflags;
2039 if (gfsflags & GFS2_DIF_APPENDONLY)
2040 stat->attributes |= STATX_ATTR_APPEND;
2041 if (gfsflags & GFS2_DIF_IMMUTABLE)
2042 stat->attributes |= STATX_ATTR_IMMUTABLE;
2043
2044 stat->attributes_mask |= (STATX_ATTR_APPEND |
2045 STATX_ATTR_COMPRESSED |
2046 STATX_ATTR_ENCRYPTED |
2047 STATX_ATTR_IMMUTABLE |
2048 STATX_ATTR_NODUMP);
2049
2050 generic_fillattr(inode, stat);
2051
2052 if (gfs2_holder_initialized(&gh))
2053 gfs2_glock_dq_uninit(&gh);
2054
2055 return 0;
2056}
2057
2058static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2059 u64 start, u64 len)
2060{
2061 struct gfs2_inode *ip = GFS2_I(inode);
2062 struct gfs2_holder gh;
2063 int ret;
2064
2065 inode_lock_shared(inode);
2066
2067 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2068 if (ret)
2069 goto out;
2070
2071 ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops);
2072
2073 gfs2_glock_dq_uninit(&gh);
2074
2075out:
2076 inode_unlock_shared(inode);
2077 return ret;
2078}
2079
2080loff_t gfs2_seek_data(struct file *file, loff_t offset)
2081{
2082 struct inode *inode = file->f_mapping->host;
2083 struct gfs2_inode *ip = GFS2_I(inode);
2084 struct gfs2_holder gh;
2085 loff_t ret;
2086
2087 inode_lock_shared(inode);
2088 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2089 if (!ret)
2090 ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops);
2091 gfs2_glock_dq_uninit(&gh);
2092 inode_unlock_shared(inode);
2093
2094 if (ret < 0)
2095 return ret;
2096 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
2097}
2098
2099loff_t gfs2_seek_hole(struct file *file, loff_t offset)
2100{
2101 struct inode *inode = file->f_mapping->host;
2102 struct gfs2_inode *ip = GFS2_I(inode);
2103 struct gfs2_holder gh;
2104 loff_t ret;
2105
2106 inode_lock_shared(inode);
2107 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2108 if (!ret)
2109 ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops);
2110 gfs2_glock_dq_uninit(&gh);
2111 inode_unlock_shared(inode);
2112
2113 if (ret < 0)
2114 return ret;
2115 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
2116}
2117
2118const struct inode_operations gfs2_file_iops = {
2119 .permission = gfs2_permission,
2120 .setattr = gfs2_setattr,
2121 .getattr = gfs2_getattr,
2122 .listxattr = gfs2_listxattr,
2123 .fiemap = gfs2_fiemap,
2124 .get_acl = gfs2_get_acl,
2125 .set_acl = gfs2_set_acl,
2126};
2127
2128const struct inode_operations gfs2_dir_iops = {
2129 .create = gfs2_create,
2130 .lookup = gfs2_lookup,
2131 .link = gfs2_link,
2132 .unlink = gfs2_unlink,
2133 .symlink = gfs2_symlink,
2134 .mkdir = gfs2_mkdir,
2135 .rmdir = gfs2_unlink,
2136 .mknod = gfs2_mknod,
2137 .rename = gfs2_rename2,
2138 .permission = gfs2_permission,
2139 .setattr = gfs2_setattr,
2140 .getattr = gfs2_getattr,
2141 .listxattr = gfs2_listxattr,
2142 .fiemap = gfs2_fiemap,
2143 .get_acl = gfs2_get_acl,
2144 .set_acl = gfs2_set_acl,
2145 .atomic_open = gfs2_atomic_open,
2146};
2147
2148const struct inode_operations gfs2_symlink_iops = {
2149 .get_link = gfs2_get_link,
2150 .permission = gfs2_permission,
2151 .setattr = gfs2_setattr,
2152 .getattr = gfs2_getattr,
2153 .listxattr = gfs2_listxattr,
2154 .fiemap = gfs2_fiemap,
2155};
2156
2157