2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/sched.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/posix_acl.h>
16 #include <linux/sort.h>
17 #include <linux/gfs2_ondisk.h>
18 #include <linux/crc32.h>
19 #include <linux/lm_interface.h>
20 #include <linux/security.h>
33 #include "ops_address.h"
34 #include "ops_inode.h"
40 struct gfs2_inum_range_host
{
45 static int iget_test(struct inode
*inode
, void *opaque
)
47 struct gfs2_inode
*ip
= GFS2_I(inode
);
48 u64
*no_addr
= opaque
;
50 if (ip
->i_no_addr
== *no_addr
&&
51 inode
->i_private
!= NULL
)
57 static int iget_set(struct inode
*inode
, void *opaque
)
59 struct gfs2_inode
*ip
= GFS2_I(inode
);
60 u64
*no_addr
= opaque
;
62 inode
->i_ino
= (unsigned long)*no_addr
;
63 ip
->i_no_addr
= *no_addr
;
67 struct inode
*gfs2_ilookup(struct super_block
*sb
, u64 no_addr
)
69 unsigned long hash
= (unsigned long)no_addr
;
70 return ilookup5(sb
, hash
, iget_test
, &no_addr
);
73 static struct inode
*gfs2_iget(struct super_block
*sb
, u64 no_addr
)
75 unsigned long hash
= (unsigned long)no_addr
;
76 return iget5_locked(sb
, hash
, iget_test
, iget_set
, &no_addr
);
79 struct gfs2_skip_data
{
84 static int iget_skip_test(struct inode
*inode
, void *opaque
)
86 struct gfs2_inode
*ip
= GFS2_I(inode
);
87 struct gfs2_skip_data
*data
= opaque
;
89 if (ip
->i_no_addr
== data
->no_addr
&& inode
->i_private
!= NULL
){
90 if (inode
->i_state
& (I_FREEING
|I_CLEAR
|I_WILL_FREE
)){
99 static int iget_skip_set(struct inode
*inode
, void *opaque
)
101 struct gfs2_inode
*ip
= GFS2_I(inode
);
102 struct gfs2_skip_data
*data
= opaque
;
106 inode
->i_ino
= (unsigned long)(data
->no_addr
);
107 ip
->i_no_addr
= data
->no_addr
;
111 static struct inode
*gfs2_iget_skip(struct super_block
*sb
,
114 struct gfs2_skip_data data
;
115 unsigned long hash
= (unsigned long)no_addr
;
117 data
.no_addr
= no_addr
;
119 return iget5_locked(sb
, hash
, iget_skip_test
, iget_skip_set
, &data
);
123 * GFS2 lookup code fills in vfs inode contents based on info obtained
124 * from directory entry inside gfs2_inode_lookup(). This has caused issues
125 * with NFS code path since its get_dentry routine doesn't have the relevant
126 * directory entry when gfs2_inode_lookup() is invoked. Part of the code
127 * segment inside gfs2_inode_lookup code needs to get moved around.
129 * Clean up I_LOCK and I_NEW as well.
132 void gfs2_set_iop(struct inode
*inode
)
134 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
135 umode_t mode
= inode
->i_mode
;
138 inode
->i_op
= &gfs2_file_iops
;
139 if (sdp
->sd_args
.ar_localflocks
)
140 inode
->i_fop
= &gfs2_file_fops_nolock
;
142 inode
->i_fop
= &gfs2_file_fops
;
143 } else if (S_ISDIR(mode
)) {
144 inode
->i_op
= &gfs2_dir_iops
;
145 if (sdp
->sd_args
.ar_localflocks
)
146 inode
->i_fop
= &gfs2_dir_fops_nolock
;
148 inode
->i_fop
= &gfs2_dir_fops
;
149 } else if (S_ISLNK(mode
)) {
150 inode
->i_op
= &gfs2_symlink_iops
;
152 inode
->i_op
= &gfs2_dev_iops
;
155 unlock_new_inode(inode
);
159 * gfs2_inode_lookup - Lookup an inode
160 * @sb: The super block
161 * @no_addr: The inode number
162 * @type: The type of the inode
163 * @skip_freeing: set this not return an inode if it is currently being freed.
165 * Returns: A VFS inode, or an error
168 struct inode
*gfs2_inode_lookup(struct super_block
*sb
,
171 u64 no_formal_ino
, int skip_freeing
)
174 struct gfs2_inode
*ip
;
175 struct gfs2_glock
*io_gl
;
179 inode
= gfs2_iget_skip(sb
, no_addr
);
181 inode
= gfs2_iget(sb
, no_addr
);
185 return ERR_PTR(-ENOBUFS
);
187 if (inode
->i_state
& I_NEW
) {
188 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
189 inode
->i_private
= ip
;
190 ip
->i_no_formal_ino
= no_formal_ino
;
192 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_inode_glops
, CREATE
, &ip
->i_gl
);
195 ip
->i_gl
->gl_object
= ip
;
197 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_iopen_glops
, CREATE
, &io_gl
);
201 set_bit(GIF_INVALID
, &ip
->i_flags
);
202 error
= gfs2_glock_nq_init(io_gl
, LM_ST_SHARED
, GL_EXACT
, &ip
->i_iopen_gh
);
205 ip
->i_iopen_gh
.gh_gl
->gl_object
= ip
;
207 gfs2_glock_put(io_gl
);
209 if ((type
== DT_UNKNOWN
) && (no_formal_ino
== 0))
212 inode
->i_mode
= DT2IF(type
);
215 * We must read the inode in order to work out its type in
216 * this case. Note that this doesn't happen often as we normally
217 * know the type beforehand. This code path only occurs during
218 * unlinked inode recovery (where it is safe to do this glock,
219 * which is not true in the general case).
221 if (type
== DT_UNKNOWN
) {
222 struct gfs2_holder gh
;
223 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &gh
);
226 /* Inode is now uptodate */
227 gfs2_glock_dq_uninit(&gh
);
236 gfs2_glock_dq(&ip
->i_iopen_gh
);
238 gfs2_glock_put(io_gl
);
240 ip
->i_gl
->gl_object
= NULL
;
241 gfs2_glock_put(ip
->i_gl
);
244 return ERR_PTR(error
);
247 static int gfs2_dinode_in(struct gfs2_inode
*ip
, const void *buf
)
249 struct gfs2_dinode_host
*di
= &ip
->i_di
;
250 const struct gfs2_dinode
*str
= buf
;
252 if (ip
->i_no_addr
!= be64_to_cpu(str
->di_num
.no_addr
)) {
253 if (gfs2_consist_inode(ip
))
254 gfs2_dinode_print(ip
);
257 ip
->i_no_formal_ino
= be64_to_cpu(str
->di_num
.no_formal_ino
);
258 ip
->i_inode
.i_mode
= be32_to_cpu(str
->di_mode
);
259 ip
->i_inode
.i_rdev
= 0;
260 switch (ip
->i_inode
.i_mode
& S_IFMT
) {
263 ip
->i_inode
.i_rdev
= MKDEV(be32_to_cpu(str
->di_major
),
264 be32_to_cpu(str
->di_minor
));
268 ip
->i_inode
.i_uid
= be32_to_cpu(str
->di_uid
);
269 ip
->i_inode
.i_gid
= be32_to_cpu(str
->di_gid
);
271 * We will need to review setting the nlink count here in the
272 * light of the forthcoming ro bind mount work. This is a reminder
275 ip
->i_inode
.i_nlink
= be32_to_cpu(str
->di_nlink
);
276 di
->di_size
= be64_to_cpu(str
->di_size
);
277 i_size_write(&ip
->i_inode
, di
->di_size
);
278 di
->di_blocks
= be64_to_cpu(str
->di_blocks
);
279 gfs2_set_inode_blocks(&ip
->i_inode
);
280 ip
->i_inode
.i_atime
.tv_sec
= be64_to_cpu(str
->di_atime
);
281 ip
->i_inode
.i_atime
.tv_nsec
= be32_to_cpu(str
->di_atime_nsec
);
282 ip
->i_inode
.i_mtime
.tv_sec
= be64_to_cpu(str
->di_mtime
);
283 ip
->i_inode
.i_mtime
.tv_nsec
= be32_to_cpu(str
->di_mtime_nsec
);
284 ip
->i_inode
.i_ctime
.tv_sec
= be64_to_cpu(str
->di_ctime
);
285 ip
->i_inode
.i_ctime
.tv_nsec
= be32_to_cpu(str
->di_ctime_nsec
);
287 di
->di_goal_meta
= be64_to_cpu(str
->di_goal_meta
);
288 di
->di_goal_data
= be64_to_cpu(str
->di_goal_data
);
289 di
->di_generation
= be64_to_cpu(str
->di_generation
);
291 di
->di_flags
= be32_to_cpu(str
->di_flags
);
292 gfs2_set_inode_flags(&ip
->i_inode
);
293 di
->di_height
= be16_to_cpu(str
->di_height
);
295 di
->di_depth
= be16_to_cpu(str
->di_depth
);
296 di
->di_entries
= be32_to_cpu(str
->di_entries
);
298 di
->di_eattr
= be64_to_cpu(str
->di_eattr
);
299 if (S_ISREG(ip
->i_inode
.i_mode
))
300 gfs2_set_aops(&ip
->i_inode
);
306 * gfs2_inode_refresh - Refresh the incore copy of the dinode
307 * @ip: The GFS2 inode
312 int gfs2_inode_refresh(struct gfs2_inode
*ip
)
314 struct buffer_head
*dibh
;
317 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
321 if (gfs2_metatype_check(GFS2_SB(&ip
->i_inode
), dibh
, GFS2_METATYPE_DI
)) {
326 error
= gfs2_dinode_in(ip
, dibh
->b_data
);
328 clear_bit(GIF_INVALID
, &ip
->i_flags
);
333 int gfs2_dinode_dealloc(struct gfs2_inode
*ip
)
335 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
336 struct gfs2_alloc
*al
;
337 struct gfs2_rgrpd
*rgd
;
340 if (ip
->i_di
.di_blocks
!= 1) {
341 if (gfs2_consist_inode(ip
))
342 gfs2_dinode_print(ip
);
346 al
= gfs2_alloc_get(ip
);
348 error
= gfs2_quota_hold(ip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
352 error
= gfs2_rindex_hold(sdp
, &al
->al_ri_gh
);
356 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_no_addr
);
358 gfs2_consist_inode(ip
);
360 goto out_rindex_relse
;
363 error
= gfs2_glock_nq_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0,
366 goto out_rindex_relse
;
368 error
= gfs2_trans_begin(sdp
, RES_RG_BIT
+ RES_STATFS
+ RES_QUOTA
, 1);
372 set_bit(GLF_DIRTY
, &ip
->i_gl
->gl_flags
);
373 set_bit(GLF_LFLUSH
, &ip
->i_gl
->gl_flags
);
375 gfs2_free_di(rgd
, ip
);
378 clear_bit(GLF_STICKY
, &ip
->i_gl
->gl_flags
);
381 gfs2_glock_dq_uninit(&al
->al_rgd_gh
);
383 gfs2_glock_dq_uninit(&al
->al_ri_gh
);
385 gfs2_quota_unhold(ip
);
392 * gfs2_change_nlink - Change nlink count on inode
393 * @ip: The GFS2 inode
394 * @diff: The change in the nlink count required
398 int gfs2_change_nlink(struct gfs2_inode
*ip
, int diff
)
400 struct buffer_head
*dibh
;
404 BUG_ON(diff
!= 1 && diff
!= -1);
405 nlink
= ip
->i_inode
.i_nlink
+ diff
;
407 /* If we are reducing the nlink count, but the new value ends up being
408 bigger than the old one, we must have underflowed. */
409 if (diff
< 0 && nlink
> ip
->i_inode
.i_nlink
) {
410 if (gfs2_consist_inode(ip
))
411 gfs2_dinode_print(ip
);
415 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
420 inc_nlink(&ip
->i_inode
);
422 drop_nlink(&ip
->i_inode
);
424 ip
->i_inode
.i_ctime
= CURRENT_TIME
;
426 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
427 gfs2_dinode_out(ip
, dibh
->b_data
);
429 mark_inode_dirty(&ip
->i_inode
);
431 if (ip
->i_inode
.i_nlink
== 0)
432 gfs2_unlink_di(&ip
->i_inode
); /* mark inode unlinked */
437 struct inode
*gfs2_lookup_simple(struct inode
*dip
, const char *name
)
441 gfs2_str2qstr(&qstr
, name
);
442 inode
= gfs2_lookupi(dip
, &qstr
, 1, NULL
);
443 /* gfs2_lookupi has inconsistent callers: vfs
444 * related routines expect NULL for no entry found,
445 * gfs2_lookup_simple callers expect ENOENT
446 * and do not check for NULL.
449 return ERR_PTR(-ENOENT
);
456 * gfs2_lookupi - Look up a filename in a directory and return its inode
457 * @d_gh: An initialized holder for the directory glock
458 * @name: The name of the inode to look for
459 * @is_root: If 1, ignore the caller's permissions
460 * @i_gh: An uninitialized holder for the new inode glock
462 * This can be called via the VFS filldir function when NFS is doing
463 * a readdirplus and the inode which its intending to stat isn't
464 * already in cache. In this case we must not take the directory glock
465 * again, since the readdir call will have already taken that lock.
470 struct inode
*gfs2_lookupi(struct inode
*dir
, const struct qstr
*name
,
471 int is_root
, struct nameidata
*nd
)
473 struct super_block
*sb
= dir
->i_sb
;
474 struct gfs2_inode
*dip
= GFS2_I(dir
);
475 struct gfs2_holder d_gh
;
477 struct inode
*inode
= NULL
;
480 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
481 return ERR_PTR(-ENAMETOOLONG
);
483 if ((name
->len
== 1 && memcmp(name
->name
, ".", 1) == 0) ||
484 (name
->len
== 2 && memcmp(name
->name
, "..", 2) == 0 &&
485 dir
== sb
->s_root
->d_inode
)) {
490 if (gfs2_glock_is_locked_by_me(dip
->i_gl
) == 0) {
491 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_SHARED
, 0, &d_gh
);
493 return ERR_PTR(error
);
498 error
= permission(dir
, MAY_EXEC
, NULL
);
503 inode
= gfs2_dir_search(dir
, name
);
505 error
= PTR_ERR(inode
);
508 gfs2_glock_dq_uninit(&d_gh
);
509 if (error
== -ENOENT
)
511 return inode
? inode
: ERR_PTR(error
);
514 static void gfs2_inum_range_in(struct gfs2_inum_range_host
*ir
, const void *buf
)
516 const struct gfs2_inum_range
*str
= buf
;
518 ir
->ir_start
= be64_to_cpu(str
->ir_start
);
519 ir
->ir_length
= be64_to_cpu(str
->ir_length
);
522 static void gfs2_inum_range_out(const struct gfs2_inum_range_host
*ir
, void *buf
)
524 struct gfs2_inum_range
*str
= buf
;
526 str
->ir_start
= cpu_to_be64(ir
->ir_start
);
527 str
->ir_length
= cpu_to_be64(ir
->ir_length
);
530 static int pick_formal_ino_1(struct gfs2_sbd
*sdp
, u64
*formal_ino
)
532 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_ir_inode
);
533 struct buffer_head
*bh
;
534 struct gfs2_inum_range_host ir
;
537 error
= gfs2_trans_begin(sdp
, RES_DINODE
, 0);
540 mutex_lock(&sdp
->sd_inum_mutex
);
542 error
= gfs2_meta_inode_buffer(ip
, &bh
);
544 mutex_unlock(&sdp
->sd_inum_mutex
);
549 gfs2_inum_range_in(&ir
, bh
->b_data
+ sizeof(struct gfs2_dinode
));
552 *formal_ino
= ir
.ir_start
++;
554 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
555 gfs2_inum_range_out(&ir
,
556 bh
->b_data
+ sizeof(struct gfs2_dinode
));
558 mutex_unlock(&sdp
->sd_inum_mutex
);
565 mutex_unlock(&sdp
->sd_inum_mutex
);
571 static int pick_formal_ino_2(struct gfs2_sbd
*sdp
, u64
*formal_ino
)
573 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_ir_inode
);
574 struct gfs2_inode
*m_ip
= GFS2_I(sdp
->sd_inum_inode
);
575 struct gfs2_holder gh
;
576 struct buffer_head
*bh
;
577 struct gfs2_inum_range_host ir
;
580 error
= gfs2_glock_nq_init(m_ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &gh
);
584 error
= gfs2_trans_begin(sdp
, 2 * RES_DINODE
, 0);
587 mutex_lock(&sdp
->sd_inum_mutex
);
589 error
= gfs2_meta_inode_buffer(ip
, &bh
);
593 gfs2_inum_range_in(&ir
, bh
->b_data
+ sizeof(struct gfs2_dinode
));
596 struct buffer_head
*m_bh
;
600 error
= gfs2_meta_inode_buffer(m_ip
, &m_bh
);
604 z
= *(__be64
*)(m_bh
->b_data
+ sizeof(struct gfs2_dinode
));
605 x
= y
= be64_to_cpu(z
);
607 ir
.ir_length
= GFS2_INUM_QUANTUM
;
608 x
+= GFS2_INUM_QUANTUM
;
610 gfs2_consist_inode(m_ip
);
612 gfs2_trans_add_bh(m_ip
->i_gl
, m_bh
, 1);
613 *(__be64
*)(m_bh
->b_data
+ sizeof(struct gfs2_dinode
)) = z
;
618 *formal_ino
= ir
.ir_start
++;
621 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
622 gfs2_inum_range_out(&ir
, bh
->b_data
+ sizeof(struct gfs2_dinode
));
627 mutex_unlock(&sdp
->sd_inum_mutex
);
630 gfs2_glock_dq_uninit(&gh
);
634 static int pick_formal_ino(struct gfs2_sbd
*sdp
, u64
*inum
)
638 error
= pick_formal_ino_1(sdp
, inum
);
642 error
= pick_formal_ino_2(sdp
, inum
);
648 * create_ok - OK to create a new on-disk inode here?
649 * @dip: Directory in which dinode is to be created
650 * @name: Name of new dinode
656 static int create_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
661 error
= permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
, NULL
);
665 /* Don't create entries in an unlinked directory */
666 if (!dip
->i_inode
.i_nlink
)
669 error
= gfs2_dir_check(&dip
->i_inode
, name
, NULL
);
680 if (dip
->i_di
.di_entries
== (u32
)-1)
682 if (S_ISDIR(mode
) && dip
->i_inode
.i_nlink
== (u32
)-1)
688 static void munge_mode_uid_gid(struct gfs2_inode
*dip
, unsigned int *mode
,
689 unsigned int *uid
, unsigned int *gid
)
691 if (GFS2_SB(&dip
->i_inode
)->sd_args
.ar_suiddir
&&
692 (dip
->i_inode
.i_mode
& S_ISUID
) && dip
->i_inode
.i_uid
) {
695 else if (dip
->i_inode
.i_uid
!= current
->fsuid
)
697 *uid
= dip
->i_inode
.i_uid
;
699 *uid
= current
->fsuid
;
701 if (dip
->i_inode
.i_mode
& S_ISGID
) {
704 *gid
= dip
->i_inode
.i_gid
;
706 *gid
= current
->fsgid
;
709 static int alloc_dinode(struct gfs2_inode
*dip
, u64
*no_addr
, u64
*generation
)
711 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
716 dip
->i_alloc
.al_requested
= RES_DINODE
;
717 error
= gfs2_inplace_reserve(dip
);
721 error
= gfs2_trans_begin(sdp
, RES_RG_BIT
+ RES_STATFS
, 0);
725 *no_addr
= gfs2_alloc_di(dip
, generation
);
730 gfs2_inplace_release(dip
);
737 * init_dinode - Fill in a new dinode structure
738 * @dip: the directory this inode is being created in
739 * @gl: The glock covering the new inode
740 * @inum: the inode number
741 * @mode: the file permissions
747 static void init_dinode(struct gfs2_inode
*dip
, struct gfs2_glock
*gl
,
748 const struct gfs2_inum_host
*inum
, unsigned int mode
,
749 unsigned int uid
, unsigned int gid
,
750 const u64
*generation
, dev_t dev
, struct buffer_head
**bhp
)
752 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
753 struct gfs2_dinode
*di
;
754 struct buffer_head
*dibh
;
755 struct timespec tv
= CURRENT_TIME
;
757 dibh
= gfs2_meta_new(gl
, inum
->no_addr
);
758 gfs2_trans_add_bh(gl
, dibh
, 1);
759 gfs2_metatype_set(dibh
, GFS2_METATYPE_DI
, GFS2_FORMAT_DI
);
760 gfs2_buffer_clear_tail(dibh
, sizeof(struct gfs2_dinode
));
761 di
= (struct gfs2_dinode
*)dibh
->b_data
;
763 di
->di_num
.no_formal_ino
= cpu_to_be64(inum
->no_formal_ino
);
764 di
->di_num
.no_addr
= cpu_to_be64(inum
->no_addr
);
765 di
->di_mode
= cpu_to_be32(mode
);
766 di
->di_uid
= cpu_to_be32(uid
);
767 di
->di_gid
= cpu_to_be32(gid
);
770 di
->di_blocks
= cpu_to_be64(1);
771 di
->di_atime
= di
->di_mtime
= di
->di_ctime
= cpu_to_be64(tv
.tv_sec
);
772 di
->di_major
= cpu_to_be32(MAJOR(dev
));
773 di
->di_minor
= cpu_to_be32(MINOR(dev
));
774 di
->di_goal_meta
= di
->di_goal_data
= cpu_to_be64(inum
->no_addr
);
775 di
->di_generation
= cpu_to_be64(*generation
);
779 if ((dip
->i_di
.di_flags
& GFS2_DIF_INHERIT_JDATA
) ||
780 gfs2_tune_get(sdp
, gt_new_files_jdata
))
781 di
->di_flags
|= cpu_to_be32(GFS2_DIF_JDATA
);
782 if ((dip
->i_di
.di_flags
& GFS2_DIF_INHERIT_DIRECTIO
) ||
783 gfs2_tune_get(sdp
, gt_new_files_directio
))
784 di
->di_flags
|= cpu_to_be32(GFS2_DIF_DIRECTIO
);
785 } else if (S_ISDIR(mode
)) {
786 di
->di_flags
|= cpu_to_be32(dip
->i_di
.di_flags
&
787 GFS2_DIF_INHERIT_DIRECTIO
);
788 di
->di_flags
|= cpu_to_be32(dip
->i_di
.di_flags
&
789 GFS2_DIF_INHERIT_JDATA
);
793 di
->di_payload_format
= cpu_to_be32(S_ISDIR(mode
) ? GFS2_FORMAT_DE
: 0);
799 memset(&di
->__pad4
, 0, sizeof(di
->__pad4
));
801 di
->di_atime_nsec
= cpu_to_be32(tv
.tv_nsec
);
802 di
->di_mtime_nsec
= cpu_to_be32(tv
.tv_nsec
);
803 di
->di_ctime_nsec
= cpu_to_be32(tv
.tv_nsec
);
804 memset(&di
->di_reserved
, 0, sizeof(di
->di_reserved
));
806 set_buffer_uptodate(dibh
);
811 static int make_dinode(struct gfs2_inode
*dip
, struct gfs2_glock
*gl
,
812 unsigned int mode
, const struct gfs2_inum_host
*inum
,
813 const u64
*generation
, dev_t dev
, struct buffer_head
**bhp
)
815 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
816 unsigned int uid
, gid
;
819 munge_mode_uid_gid(dip
, &mode
, &uid
, &gid
);
822 error
= gfs2_quota_lock(dip
, uid
, gid
);
826 error
= gfs2_quota_check(dip
, uid
, gid
);
830 error
= gfs2_trans_begin(sdp
, RES_DINODE
+ RES_QUOTA
, 0);
834 init_dinode(dip
, gl
, inum
, mode
, uid
, gid
, generation
, dev
, bhp
);
835 gfs2_quota_change(dip
, +1, uid
, gid
);
839 gfs2_quota_unlock(dip
);
845 static int link_dinode(struct gfs2_inode
*dip
, const struct qstr
*name
,
846 struct gfs2_inode
*ip
)
848 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
849 struct gfs2_alloc
*al
;
851 struct buffer_head
*dibh
;
854 al
= gfs2_alloc_get(dip
);
856 error
= gfs2_quota_lock(dip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
860 error
= alloc_required
= gfs2_diradd_alloc_required(&dip
->i_inode
, name
);
861 if (alloc_required
< 0)
863 if (alloc_required
) {
864 error
= gfs2_quota_check(dip
, dip
->i_inode
.i_uid
, dip
->i_inode
.i_gid
);
866 goto fail_quota_locks
;
868 al
->al_requested
= sdp
->sd_max_dirres
;
870 error
= gfs2_inplace_reserve(dip
);
872 goto fail_quota_locks
;
874 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
875 al
->al_rgd
->rd_length
+
877 RES_STATFS
+ RES_QUOTA
, 0);
881 error
= gfs2_trans_begin(sdp
, RES_LEAF
+ 2 * RES_DINODE
, 0);
883 goto fail_quota_locks
;
886 error
= gfs2_dir_add(&dip
->i_inode
, name
, ip
, IF2DT(ip
->i_inode
.i_mode
));
890 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
893 ip
->i_inode
.i_nlink
= 1;
894 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
895 gfs2_dinode_out(ip
, dibh
->b_data
);
903 if (dip
->i_alloc
.al_rgd
)
904 gfs2_inplace_release(dip
);
907 gfs2_quota_unlock(dip
);
914 static int gfs2_security_init(struct gfs2_inode
*dip
, struct gfs2_inode
*ip
)
920 struct gfs2_ea_request er
;
922 err
= security_inode_init_security(&ip
->i_inode
, &dip
->i_inode
,
923 &name
, &value
, &len
);
926 if (err
== -EOPNOTSUPP
)
931 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
933 er
.er_type
= GFS2_EATYPE_SECURITY
;
936 er
.er_name_len
= strlen(name
);
937 er
.er_data_len
= len
;
939 err
= gfs2_ea_set_i(ip
, &er
);
948 * gfs2_createi - Create a new inode
949 * @ghs: An array of two holders
950 * @name: The name of the new file
951 * @mode: the permissions on the new inode
953 * @ghs[0] is an initialized holder for the directory
954 * @ghs[1] is the holder for the inode lock
956 * If the return value is not NULL, the glocks on both the directory and the new
957 * file are held. A transaction has been started and an inplace reservation
963 struct inode
*gfs2_createi(struct gfs2_holder
*ghs
, const struct qstr
*name
,
964 unsigned int mode
, dev_t dev
)
966 struct inode
*inode
= NULL
;
967 struct gfs2_inode
*dip
= ghs
->gh_gl
->gl_object
;
968 struct inode
*dir
= &dip
->i_inode
;
969 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
970 struct gfs2_inum_host inum
= { .no_addr
= 0, .no_formal_ino
= 0 };
973 struct buffer_head
*bh
= NULL
;
975 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
976 return ERR_PTR(-ENAMETOOLONG
);
978 gfs2_holder_reinit(LM_ST_EXCLUSIVE
, 0, ghs
);
979 error
= gfs2_glock_nq(ghs
);
983 error
= create_ok(dip
, name
, mode
);
987 error
= pick_formal_ino(sdp
, &inum
.no_formal_ino
);
991 error
= alloc_dinode(dip
, &inum
.no_addr
, &generation
);
995 error
= gfs2_glock_nq_num(sdp
, inum
.no_addr
, &gfs2_inode_glops
,
996 LM_ST_EXCLUSIVE
, GL_SKIP
, ghs
+ 1);
1000 error
= make_dinode(dip
, ghs
[1].gh_gl
, mode
, &inum
, &generation
, dev
, &bh
);
1004 inode
= gfs2_inode_lookup(dir
->i_sb
, IF2DT(mode
),
1006 inum
.no_formal_ino
, 0);
1010 error
= gfs2_inode_refresh(GFS2_I(inode
));
1014 error
= gfs2_acl_create(dip
, GFS2_I(inode
));
1018 error
= gfs2_security_init(dip
, GFS2_I(inode
));
1022 error
= link_dinode(dip
, name
, GFS2_I(inode
));
1029 return ERR_PTR(-ENOMEM
);
1033 gfs2_glock_dq_uninit(ghs
+ 1);
1041 return ERR_PTR(error
);
1045 * gfs2_rmdiri - Remove a directory
1046 * @dip: The parent directory of the directory to be removed
1047 * @name: The name of the directory to be removed
1048 * @ip: The GFS2 inode of the directory to be removed
1050 * Assumes Glocks on dip and ip are held
1055 int gfs2_rmdiri(struct gfs2_inode
*dip
, const struct qstr
*name
,
1056 struct gfs2_inode
*ip
)
1058 struct qstr dotname
;
1061 if (ip
->i_di
.di_entries
!= 2) {
1062 if (gfs2_consist_inode(ip
))
1063 gfs2_dinode_print(ip
);
1067 error
= gfs2_dir_del(dip
, name
);
1071 error
= gfs2_change_nlink(dip
, -1);
1075 gfs2_str2qstr(&dotname
, ".");
1076 error
= gfs2_dir_del(ip
, &dotname
);
1080 gfs2_str2qstr(&dotname
, "..");
1081 error
= gfs2_dir_del(ip
, &dotname
);
1085 /* It looks odd, but it really should be done twice */
1086 error
= gfs2_change_nlink(ip
, -1);
1090 error
= gfs2_change_nlink(ip
, -1);
1098 * gfs2_unlink_ok - check to see that a inode is still in a directory
1099 * @dip: the directory
1100 * @name: the name of the file
1103 * Assumes that the lock on (at least) @dip is held.
1105 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1108 int gfs2_unlink_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
1109 const struct gfs2_inode
*ip
)
1113 if (IS_IMMUTABLE(&ip
->i_inode
) || IS_APPEND(&ip
->i_inode
))
1116 if ((dip
->i_inode
.i_mode
& S_ISVTX
) &&
1117 dip
->i_inode
.i_uid
!= current
->fsuid
&&
1118 ip
->i_inode
.i_uid
!= current
->fsuid
&& !capable(CAP_FOWNER
))
1121 if (IS_APPEND(&dip
->i_inode
))
1124 error
= permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
, NULL
);
1128 error
= gfs2_dir_check(&dip
->i_inode
, name
, ip
);
1136 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1140 * Follow @to back to the root and make sure we don't encounter @this
1141 * Assumes we already hold the rename lock.
1146 int gfs2_ok_to_move(struct gfs2_inode
*this, struct gfs2_inode
*to
)
1148 struct inode
*dir
= &to
->i_inode
;
1149 struct super_block
*sb
= dir
->i_sb
;
1154 gfs2_str2qstr(&dotdot
, "..");
1159 if (dir
== &this->i_inode
) {
1163 if (dir
== sb
->s_root
->d_inode
) {
1168 tmp
= gfs2_lookupi(dir
, &dotdot
, 1, NULL
);
1170 error
= PTR_ERR(tmp
);
1184 * gfs2_readlinki - return the contents of a symlink
1185 * @ip: the symlink's inode
1186 * @buf: a pointer to the buffer to be filled
1187 * @len: a pointer to the length of @buf
1189 * If @buf is too small, a piece of memory is kmalloc()ed and needs
1190 * to be freed by the caller.
1195 int gfs2_readlinki(struct gfs2_inode
*ip
, char **buf
, unsigned int *len
)
1197 struct gfs2_holder i_gh
;
1198 struct buffer_head
*dibh
;
1202 gfs2_holder_init(ip
->i_gl
, LM_ST_SHARED
, GL_ATIME
, &i_gh
);
1203 error
= gfs2_glock_nq_atime(&i_gh
);
1205 gfs2_holder_uninit(&i_gh
);
1209 if (!ip
->i_di
.di_size
) {
1210 gfs2_consist_inode(ip
);
1215 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1219 x
= ip
->i_di
.di_size
+ 1;
1221 *buf
= kmalloc(x
, GFP_KERNEL
);
1228 memcpy(*buf
, dibh
->b_data
+ sizeof(struct gfs2_dinode
), x
);
1234 gfs2_glock_dq_uninit(&i_gh
);
1239 * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
1240 * conditionally update the inode's atime
1241 * @gh: the holder to acquire
1243 * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
1244 * Update if the difference between the current time and the inode's current
1245 * atime is greater than an interval specified at mount.
1250 int gfs2_glock_nq_atime(struct gfs2_holder
*gh
)
1252 struct gfs2_glock
*gl
= gh
->gh_gl
;
1253 struct gfs2_sbd
*sdp
= gl
->gl_sbd
;
1254 struct gfs2_inode
*ip
= gl
->gl_object
;
1255 s64 quantum
= gfs2_tune_get(sdp
, gt_atime_quantum
);
1259 struct timespec tv
= CURRENT_TIME
;
1261 if (gfs2_assert_warn(sdp
, gh
->gh_flags
& GL_ATIME
) ||
1262 gfs2_assert_warn(sdp
, !(gh
->gh_flags
& GL_ASYNC
)) ||
1263 gfs2_assert_warn(sdp
, gl
->gl_ops
== &gfs2_inode_glops
))
1266 state
= gh
->gh_state
;
1267 flags
= gh
->gh_flags
;
1269 error
= gfs2_glock_nq(gh
);
1273 if (test_bit(SDF_NOATIME
, &sdp
->sd_flags
) ||
1274 (sdp
->sd_vfs
->s_flags
& MS_RDONLY
))
1277 if (tv
.tv_sec
- ip
->i_inode
.i_atime
.tv_sec
>= quantum
) {
1279 gfs2_holder_reinit(LM_ST_EXCLUSIVE
, gh
->gh_flags
& ~LM_FLAG_ANY
,
1281 error
= gfs2_glock_nq(gh
);
1285 /* Verify that atime hasn't been updated while we were
1286 trying to get exclusive lock. */
1289 if (tv
.tv_sec
- ip
->i_inode
.i_atime
.tv_sec
>= quantum
) {
1290 struct buffer_head
*dibh
;
1291 struct gfs2_dinode
*di
;
1293 error
= gfs2_trans_begin(sdp
, RES_DINODE
, 0);
1294 if (error
== -EROFS
)
1299 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1301 goto fail_end_trans
;
1303 ip
->i_inode
.i_atime
= tv
;
1305 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1306 di
= (struct gfs2_dinode
*)dibh
->b_data
;
1307 di
->di_atime
= cpu_to_be64(ip
->i_inode
.i_atime
.tv_sec
);
1308 di
->di_atime_nsec
= cpu_to_be32(ip
->i_inode
.i_atime
.tv_nsec
);
1311 gfs2_trans_end(sdp
);
1314 /* If someone else has asked for the glock,
1315 unlock and let them have it. Then reacquire
1316 in the original state. */
1317 if (gfs2_glock_is_blocking(gl
)) {
1319 gfs2_holder_reinit(state
, flags
, gh
);
1320 return gfs2_glock_nq(gh
);
1327 gfs2_trans_end(sdp
);
1334 __gfs2_setattr_simple(struct gfs2_inode
*ip
, struct iattr
*attr
)
1336 struct buffer_head
*dibh
;
1339 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1341 error
= inode_setattr(&ip
->i_inode
, attr
);
1342 gfs2_assert_warn(GFS2_SB(&ip
->i_inode
), !error
);
1343 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1344 gfs2_dinode_out(ip
, dibh
->b_data
);
1351 * gfs2_setattr_simple -
1355 * Called with a reference on the vnode.
1360 int gfs2_setattr_simple(struct gfs2_inode
*ip
, struct iattr
*attr
)
1364 if (current
->journal_info
)
1365 return __gfs2_setattr_simple(ip
, attr
);
1367 error
= gfs2_trans_begin(GFS2_SB(&ip
->i_inode
), RES_DINODE
, 0);
1371 error
= __gfs2_setattr_simple(ip
, attr
);
1372 gfs2_trans_end(GFS2_SB(&ip
->i_inode
));
1376 void gfs2_dinode_out(const struct gfs2_inode
*ip
, void *buf
)
1378 const struct gfs2_dinode_host
*di
= &ip
->i_di
;
1379 struct gfs2_dinode
*str
= buf
;
1381 str
->di_header
.mh_magic
= cpu_to_be32(GFS2_MAGIC
);
1382 str
->di_header
.mh_type
= cpu_to_be32(GFS2_METATYPE_DI
);
1383 str
->di_header
.__pad0
= 0;
1384 str
->di_header
.mh_format
= cpu_to_be32(GFS2_FORMAT_DI
);
1385 str
->di_header
.__pad1
= 0;
1386 str
->di_num
.no_addr
= cpu_to_be64(ip
->i_no_addr
);
1387 str
->di_num
.no_formal_ino
= cpu_to_be64(ip
->i_no_formal_ino
);
1388 str
->di_mode
= cpu_to_be32(ip
->i_inode
.i_mode
);
1389 str
->di_uid
= cpu_to_be32(ip
->i_inode
.i_uid
);
1390 str
->di_gid
= cpu_to_be32(ip
->i_inode
.i_gid
);
1391 str
->di_nlink
= cpu_to_be32(ip
->i_inode
.i_nlink
);
1392 str
->di_size
= cpu_to_be64(di
->di_size
);
1393 str
->di_blocks
= cpu_to_be64(di
->di_blocks
);
1394 str
->di_atime
= cpu_to_be64(ip
->i_inode
.i_atime
.tv_sec
);
1395 str
->di_mtime
= cpu_to_be64(ip
->i_inode
.i_mtime
.tv_sec
);
1396 str
->di_ctime
= cpu_to_be64(ip
->i_inode
.i_ctime
.tv_sec
);
1398 str
->di_goal_meta
= cpu_to_be64(di
->di_goal_meta
);
1399 str
->di_goal_data
= cpu_to_be64(di
->di_goal_data
);
1400 str
->di_generation
= cpu_to_be64(di
->di_generation
);
1402 str
->di_flags
= cpu_to_be32(di
->di_flags
);
1403 str
->di_height
= cpu_to_be16(di
->di_height
);
1404 str
->di_payload_format
= cpu_to_be32(S_ISDIR(ip
->i_inode
.i_mode
) &&
1405 !(ip
->i_di
.di_flags
& GFS2_DIF_EXHASH
) ?
1406 GFS2_FORMAT_DE
: 0);
1407 str
->di_depth
= cpu_to_be16(di
->di_depth
);
1408 str
->di_entries
= cpu_to_be32(di
->di_entries
);
1410 str
->di_eattr
= cpu_to_be64(di
->di_eattr
);
1411 str
->di_atime_nsec
= cpu_to_be32(ip
->i_inode
.i_atime
.tv_nsec
);
1412 str
->di_mtime_nsec
= cpu_to_be32(ip
->i_inode
.i_mtime
.tv_nsec
);
1413 str
->di_ctime_nsec
= cpu_to_be32(ip
->i_inode
.i_ctime
.tv_nsec
);
1416 void gfs2_dinode_print(const struct gfs2_inode
*ip
)
1418 const struct gfs2_dinode_host
*di
= &ip
->i_di
;
1420 printk(KERN_INFO
" no_formal_ino = %llu\n",
1421 (unsigned long long)ip
->i_no_formal_ino
);
1422 printk(KERN_INFO
" no_addr = %llu\n",
1423 (unsigned long long)ip
->i_no_addr
);
1424 printk(KERN_INFO
" di_size = %llu\n", (unsigned long long)di
->di_size
);
1425 printk(KERN_INFO
" di_blocks = %llu\n",
1426 (unsigned long long)di
->di_blocks
);
1427 printk(KERN_INFO
" di_goal_meta = %llu\n",
1428 (unsigned long long)di
->di_goal_meta
);
1429 printk(KERN_INFO
" di_goal_data = %llu\n",
1430 (unsigned long long)di
->di_goal_data
);
1431 printk(KERN_INFO
" di_flags = 0x%.8X\n", di
->di_flags
);
1432 printk(KERN_INFO
" di_height = %u\n", di
->di_height
);
1433 printk(KERN_INFO
" di_depth = %u\n", di
->di_depth
);
1434 printk(KERN_INFO
" di_entries = %u\n", di
->di_entries
);
1435 printk(KERN_INFO
" di_eattr = %llu\n",
1436 (unsigned long long)di
->di_eattr
);