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"
35 #include "ops_inode.h"
41 struct gfs2_inum_range_host
{
46 static int iget_test(struct inode
*inode
, void *opaque
)
48 struct gfs2_inode
*ip
= GFS2_I(inode
);
49 u64
*no_addr
= opaque
;
51 if (ip
->i_no_addr
== *no_addr
&&
52 inode
->i_private
!= NULL
)
58 static int iget_set(struct inode
*inode
, void *opaque
)
60 struct gfs2_inode
*ip
= GFS2_I(inode
);
61 u64
*no_addr
= opaque
;
63 inode
->i_ino
= (unsigned long)*no_addr
;
64 ip
->i_no_addr
= *no_addr
;
68 struct inode
*gfs2_ilookup(struct super_block
*sb
, u64 no_addr
)
70 unsigned long hash
= (unsigned long)no_addr
;
71 return ilookup5(sb
, hash
, iget_test
, &no_addr
);
74 static struct inode
*gfs2_iget(struct super_block
*sb
, u64 no_addr
)
76 unsigned long hash
= (unsigned long)no_addr
;
77 return iget5_locked(sb
, hash
, iget_test
, iget_set
, &no_addr
);
81 * gfs2_inode_lookup - Lookup an inode
82 * @sb: The super block
83 * @no_addr: The inode number
84 * @type: The type of the inode
86 * Returns: A VFS inode, or an error
89 struct inode
*gfs2_inode_lookup(struct super_block
*sb
, u64 no_addr
, unsigned int type
)
91 struct inode
*inode
= gfs2_iget(sb
, no_addr
);
92 struct gfs2_inode
*ip
= GFS2_I(inode
);
93 struct gfs2_glock
*io_gl
;
97 return ERR_PTR(-ENOBUFS
);
99 if (inode
->i_state
& I_NEW
) {
100 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
102 inode
->i_private
= ip
;
104 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_inode_glops
, CREATE
, &ip
->i_gl
);
107 ip
->i_gl
->gl_object
= ip
;
109 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_iopen_glops
, CREATE
, &io_gl
);
113 set_bit(GIF_INVALID
, &ip
->i_flags
);
114 error
= gfs2_glock_nq_init(io_gl
, LM_ST_SHARED
, GL_EXACT
, &ip
->i_iopen_gh
);
118 gfs2_glock_put(io_gl
);
121 * We must read the inode in order to work out its type in
122 * this case. Note that this doesn't happen often as we normally
123 * know the type beforehand. This code path only occurs during
124 * unlinked inode recovery (where it is safe to do this glock,
125 * which is not true in the general case).
127 inode
->i_mode
= mode
= DT2IF(type
);
128 if (type
== DT_UNKNOWN
) {
129 struct gfs2_holder gh
;
130 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &gh
);
133 /* Inode is now uptodate */
134 mode
= inode
->i_mode
;
135 gfs2_glock_dq_uninit(&gh
);
139 inode
->i_op
= &gfs2_file_iops
;
140 inode
->i_fop
= &gfs2_file_fops
;
141 inode
->i_mapping
->a_ops
= &gfs2_file_aops
;
142 } else if (S_ISDIR(mode
)) {
143 inode
->i_op
= &gfs2_dir_iops
;
144 inode
->i_fop
= &gfs2_dir_fops
;
145 } else if (S_ISLNK(mode
)) {
146 inode
->i_op
= &gfs2_symlink_iops
;
148 inode
->i_op
= &gfs2_dev_iops
;
151 unlock_new_inode(inode
);
156 gfs2_glock_dq(&ip
->i_iopen_gh
);
158 gfs2_glock_put(io_gl
);
160 ip
->i_gl
->gl_object
= NULL
;
161 gfs2_glock_put(ip
->i_gl
);
164 return ERR_PTR(error
);
167 static int gfs2_dinode_in(struct gfs2_inode
*ip
, const void *buf
)
169 struct gfs2_dinode_host
*di
= &ip
->i_di
;
170 const struct gfs2_dinode
*str
= buf
;
172 if (ip
->i_no_addr
!= be64_to_cpu(str
->di_num
.no_addr
)) {
173 if (gfs2_consist_inode(ip
))
174 gfs2_dinode_print(ip
);
177 ip
->i_no_formal_ino
= be64_to_cpu(str
->di_num
.no_formal_ino
);
178 ip
->i_inode
.i_mode
= be32_to_cpu(str
->di_mode
);
179 ip
->i_inode
.i_rdev
= 0;
180 switch (ip
->i_inode
.i_mode
& S_IFMT
) {
183 ip
->i_inode
.i_rdev
= MKDEV(be32_to_cpu(str
->di_major
),
184 be32_to_cpu(str
->di_minor
));
188 ip
->i_inode
.i_uid
= be32_to_cpu(str
->di_uid
);
189 ip
->i_inode
.i_gid
= be32_to_cpu(str
->di_gid
);
191 * We will need to review setting the nlink count here in the
192 * light of the forthcoming ro bind mount work. This is a reminder
195 ip
->i_inode
.i_nlink
= be32_to_cpu(str
->di_nlink
);
196 di
->di_size
= be64_to_cpu(str
->di_size
);
197 i_size_write(&ip
->i_inode
, di
->di_size
);
198 di
->di_blocks
= be64_to_cpu(str
->di_blocks
);
199 gfs2_set_inode_blocks(&ip
->i_inode
);
200 ip
->i_inode
.i_atime
.tv_sec
= be64_to_cpu(str
->di_atime
);
201 ip
->i_inode
.i_atime
.tv_nsec
= be32_to_cpu(str
->di_atime_nsec
);
202 ip
->i_inode
.i_mtime
.tv_sec
= be64_to_cpu(str
->di_mtime
);
203 ip
->i_inode
.i_mtime
.tv_nsec
= be32_to_cpu(str
->di_mtime_nsec
);
204 ip
->i_inode
.i_ctime
.tv_sec
= be64_to_cpu(str
->di_ctime
);
205 ip
->i_inode
.i_ctime
.tv_nsec
= be32_to_cpu(str
->di_ctime_nsec
);
207 di
->di_goal_meta
= be64_to_cpu(str
->di_goal_meta
);
208 di
->di_goal_data
= be64_to_cpu(str
->di_goal_data
);
209 di
->di_generation
= be64_to_cpu(str
->di_generation
);
211 di
->di_flags
= be32_to_cpu(str
->di_flags
);
212 gfs2_set_inode_flags(&ip
->i_inode
);
213 di
->di_height
= be16_to_cpu(str
->di_height
);
215 di
->di_depth
= be16_to_cpu(str
->di_depth
);
216 di
->di_entries
= be32_to_cpu(str
->di_entries
);
218 di
->di_eattr
= be64_to_cpu(str
->di_eattr
);
223 * gfs2_inode_refresh - Refresh the incore copy of the dinode
224 * @ip: The GFS2 inode
229 int gfs2_inode_refresh(struct gfs2_inode
*ip
)
231 struct buffer_head
*dibh
;
234 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
238 if (gfs2_metatype_check(GFS2_SB(&ip
->i_inode
), dibh
, GFS2_METATYPE_DI
)) {
243 error
= gfs2_dinode_in(ip
, dibh
->b_data
);
245 clear_bit(GIF_INVALID
, &ip
->i_flags
);
250 int gfs2_dinode_dealloc(struct gfs2_inode
*ip
)
252 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
253 struct gfs2_alloc
*al
;
254 struct gfs2_rgrpd
*rgd
;
257 if (ip
->i_di
.di_blocks
!= 1) {
258 if (gfs2_consist_inode(ip
))
259 gfs2_dinode_print(ip
);
263 al
= gfs2_alloc_get(ip
);
265 error
= gfs2_quota_hold(ip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
269 error
= gfs2_rindex_hold(sdp
, &al
->al_ri_gh
);
273 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_no_addr
);
275 gfs2_consist_inode(ip
);
277 goto out_rindex_relse
;
280 error
= gfs2_glock_nq_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0,
283 goto out_rindex_relse
;
285 error
= gfs2_trans_begin(sdp
, RES_RG_BIT
+ RES_STATFS
+ RES_QUOTA
, 1);
289 gfs2_trans_add_gl(ip
->i_gl
);
291 gfs2_free_di(rgd
, ip
);
294 clear_bit(GLF_STICKY
, &ip
->i_gl
->gl_flags
);
297 gfs2_glock_dq_uninit(&al
->al_rgd_gh
);
299 gfs2_glock_dq_uninit(&al
->al_ri_gh
);
301 gfs2_quota_unhold(ip
);
308 * gfs2_change_nlink - Change nlink count on inode
309 * @ip: The GFS2 inode
310 * @diff: The change in the nlink count required
314 int gfs2_change_nlink(struct gfs2_inode
*ip
, int diff
)
316 struct buffer_head
*dibh
;
320 BUG_ON(diff
!= 1 && diff
!= -1);
321 nlink
= ip
->i_inode
.i_nlink
+ diff
;
323 /* If we are reducing the nlink count, but the new value ends up being
324 bigger than the old one, we must have underflowed. */
325 if (diff
< 0 && nlink
> ip
->i_inode
.i_nlink
) {
326 if (gfs2_consist_inode(ip
))
327 gfs2_dinode_print(ip
);
331 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
336 inc_nlink(&ip
->i_inode
);
338 drop_nlink(&ip
->i_inode
);
340 ip
->i_inode
.i_ctime
= CURRENT_TIME
;
342 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
343 gfs2_dinode_out(ip
, dibh
->b_data
);
345 mark_inode_dirty(&ip
->i_inode
);
347 if (ip
->i_inode
.i_nlink
== 0)
348 gfs2_unlink_di(&ip
->i_inode
); /* mark inode unlinked */
353 struct inode
*gfs2_lookup_simple(struct inode
*dip
, const char *name
)
357 gfs2_str2qstr(&qstr
, name
);
358 inode
= gfs2_lookupi(dip
, &qstr
, 1, NULL
);
359 /* gfs2_lookupi has inconsistent callers: vfs
360 * related routines expect NULL for no entry found,
361 * gfs2_lookup_simple callers expect ENOENT
362 * and do not check for NULL.
365 return ERR_PTR(-ENOENT
);
372 * gfs2_lookupi - Look up a filename in a directory and return its inode
373 * @d_gh: An initialized holder for the directory glock
374 * @name: The name of the inode to look for
375 * @is_root: If 1, ignore the caller's permissions
376 * @i_gh: An uninitialized holder for the new inode glock
378 * This can be called via the VFS filldir function when NFS is doing
379 * a readdirplus and the inode which its intending to stat isn't
380 * already in cache. In this case we must not take the directory glock
381 * again, since the readdir call will have already taken that lock.
386 struct inode
*gfs2_lookupi(struct inode
*dir
, const struct qstr
*name
,
387 int is_root
, struct nameidata
*nd
)
389 struct super_block
*sb
= dir
->i_sb
;
390 struct gfs2_inode
*dip
= GFS2_I(dir
);
391 struct gfs2_holder d_gh
;
393 struct inode
*inode
= NULL
;
396 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
397 return ERR_PTR(-ENAMETOOLONG
);
399 if ((name
->len
== 1 && memcmp(name
->name
, ".", 1) == 0) ||
400 (name
->len
== 2 && memcmp(name
->name
, "..", 2) == 0 &&
401 dir
== sb
->s_root
->d_inode
)) {
406 if (gfs2_glock_is_locked_by_me(dip
->i_gl
) == 0) {
407 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_SHARED
, 0, &d_gh
);
409 return ERR_PTR(error
);
414 error
= permission(dir
, MAY_EXEC
, NULL
);
419 inode
= gfs2_dir_search(dir
, name
);
421 error
= PTR_ERR(inode
);
424 gfs2_glock_dq_uninit(&d_gh
);
425 if (error
== -ENOENT
)
427 return inode
? inode
: ERR_PTR(error
);
430 static void gfs2_inum_range_in(struct gfs2_inum_range_host
*ir
, const void *buf
)
432 const struct gfs2_inum_range
*str
= buf
;
434 ir
->ir_start
= be64_to_cpu(str
->ir_start
);
435 ir
->ir_length
= be64_to_cpu(str
->ir_length
);
438 static void gfs2_inum_range_out(const struct gfs2_inum_range_host
*ir
, void *buf
)
440 struct gfs2_inum_range
*str
= buf
;
442 str
->ir_start
= cpu_to_be64(ir
->ir_start
);
443 str
->ir_length
= cpu_to_be64(ir
->ir_length
);
446 static int pick_formal_ino_1(struct gfs2_sbd
*sdp
, u64
*formal_ino
)
448 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_ir_inode
);
449 struct buffer_head
*bh
;
450 struct gfs2_inum_range_host ir
;
453 error
= gfs2_trans_begin(sdp
, RES_DINODE
, 0);
456 mutex_lock(&sdp
->sd_inum_mutex
);
458 error
= gfs2_meta_inode_buffer(ip
, &bh
);
460 mutex_unlock(&sdp
->sd_inum_mutex
);
465 gfs2_inum_range_in(&ir
, bh
->b_data
+ sizeof(struct gfs2_dinode
));
468 *formal_ino
= ir
.ir_start
++;
470 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
471 gfs2_inum_range_out(&ir
,
472 bh
->b_data
+ sizeof(struct gfs2_dinode
));
474 mutex_unlock(&sdp
->sd_inum_mutex
);
481 mutex_unlock(&sdp
->sd_inum_mutex
);
487 static int pick_formal_ino_2(struct gfs2_sbd
*sdp
, u64
*formal_ino
)
489 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_ir_inode
);
490 struct gfs2_inode
*m_ip
= GFS2_I(sdp
->sd_inum_inode
);
491 struct gfs2_holder gh
;
492 struct buffer_head
*bh
;
493 struct gfs2_inum_range_host ir
;
496 error
= gfs2_glock_nq_init(m_ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &gh
);
500 error
= gfs2_trans_begin(sdp
, 2 * RES_DINODE
, 0);
503 mutex_lock(&sdp
->sd_inum_mutex
);
505 error
= gfs2_meta_inode_buffer(ip
, &bh
);
509 gfs2_inum_range_in(&ir
, bh
->b_data
+ sizeof(struct gfs2_dinode
));
512 struct buffer_head
*m_bh
;
516 error
= gfs2_meta_inode_buffer(m_ip
, &m_bh
);
520 z
= *(__be64
*)(m_bh
->b_data
+ sizeof(struct gfs2_dinode
));
521 x
= y
= be64_to_cpu(z
);
523 ir
.ir_length
= GFS2_INUM_QUANTUM
;
524 x
+= GFS2_INUM_QUANTUM
;
526 gfs2_consist_inode(m_ip
);
528 gfs2_trans_add_bh(m_ip
->i_gl
, m_bh
, 1);
529 *(__be64
*)(m_bh
->b_data
+ sizeof(struct gfs2_dinode
)) = z
;
534 *formal_ino
= ir
.ir_start
++;
537 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
538 gfs2_inum_range_out(&ir
, bh
->b_data
+ sizeof(struct gfs2_dinode
));
543 mutex_unlock(&sdp
->sd_inum_mutex
);
546 gfs2_glock_dq_uninit(&gh
);
550 static int pick_formal_ino(struct gfs2_sbd
*sdp
, u64
*inum
)
554 error
= pick_formal_ino_1(sdp
, inum
);
558 error
= pick_formal_ino_2(sdp
, inum
);
564 * create_ok - OK to create a new on-disk inode here?
565 * @dip: Directory in which dinode is to be created
566 * @name: Name of new dinode
572 static int create_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
577 error
= permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
, NULL
);
581 /* Don't create entries in an unlinked directory */
582 if (!dip
->i_inode
.i_nlink
)
585 error
= gfs2_dir_check(&dip
->i_inode
, name
, NULL
);
596 if (dip
->i_di
.di_entries
== (u32
)-1)
598 if (S_ISDIR(mode
) && dip
->i_inode
.i_nlink
== (u32
)-1)
604 static void munge_mode_uid_gid(struct gfs2_inode
*dip
, unsigned int *mode
,
605 unsigned int *uid
, unsigned int *gid
)
607 if (GFS2_SB(&dip
->i_inode
)->sd_args
.ar_suiddir
&&
608 (dip
->i_inode
.i_mode
& S_ISUID
) && dip
->i_inode
.i_uid
) {
611 else if (dip
->i_inode
.i_uid
!= current
->fsuid
)
613 *uid
= dip
->i_inode
.i_uid
;
615 *uid
= current
->fsuid
;
617 if (dip
->i_inode
.i_mode
& S_ISGID
) {
620 *gid
= dip
->i_inode
.i_gid
;
622 *gid
= current
->fsgid
;
625 static int alloc_dinode(struct gfs2_inode
*dip
, u64
*no_addr
, u64
*generation
)
627 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
632 dip
->i_alloc
.al_requested
= RES_DINODE
;
633 error
= gfs2_inplace_reserve(dip
);
637 error
= gfs2_trans_begin(sdp
, RES_RG_BIT
+ RES_STATFS
, 0);
641 *no_addr
= gfs2_alloc_di(dip
, generation
);
646 gfs2_inplace_release(dip
);
653 * init_dinode - Fill in a new dinode structure
654 * @dip: the directory this inode is being created in
655 * @gl: The glock covering the new inode
656 * @inum: the inode number
657 * @mode: the file permissions
663 static void init_dinode(struct gfs2_inode
*dip
, struct gfs2_glock
*gl
,
664 const struct gfs2_inum_host
*inum
, unsigned int mode
,
665 unsigned int uid
, unsigned int gid
,
666 const u64
*generation
, dev_t dev
)
668 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
669 struct gfs2_dinode
*di
;
670 struct buffer_head
*dibh
;
671 struct timespec tv
= CURRENT_TIME
;
673 dibh
= gfs2_meta_new(gl
, inum
->no_addr
);
674 gfs2_trans_add_bh(gl
, dibh
, 1);
675 gfs2_metatype_set(dibh
, GFS2_METATYPE_DI
, GFS2_FORMAT_DI
);
676 gfs2_buffer_clear_tail(dibh
, sizeof(struct gfs2_dinode
));
677 di
= (struct gfs2_dinode
*)dibh
->b_data
;
679 di
->di_num
.no_formal_ino
= cpu_to_be64(inum
->no_formal_ino
);
680 di
->di_num
.no_addr
= cpu_to_be64(inum
->no_addr
);
681 di
->di_mode
= cpu_to_be32(mode
);
682 di
->di_uid
= cpu_to_be32(uid
);
683 di
->di_gid
= cpu_to_be32(gid
);
686 di
->di_blocks
= cpu_to_be64(1);
687 di
->di_atime
= di
->di_mtime
= di
->di_ctime
= cpu_to_be64(tv
.tv_sec
);
688 di
->di_major
= cpu_to_be32(MAJOR(dev
));
689 di
->di_minor
= cpu_to_be32(MINOR(dev
));
690 di
->di_goal_meta
= di
->di_goal_data
= cpu_to_be64(inum
->no_addr
);
691 di
->di_generation
= cpu_to_be64(*generation
);
695 if ((dip
->i_di
.di_flags
& GFS2_DIF_INHERIT_JDATA
) ||
696 gfs2_tune_get(sdp
, gt_new_files_jdata
))
697 di
->di_flags
|= cpu_to_be32(GFS2_DIF_JDATA
);
698 if ((dip
->i_di
.di_flags
& GFS2_DIF_INHERIT_DIRECTIO
) ||
699 gfs2_tune_get(sdp
, gt_new_files_directio
))
700 di
->di_flags
|= cpu_to_be32(GFS2_DIF_DIRECTIO
);
701 } else if (S_ISDIR(mode
)) {
702 di
->di_flags
|= cpu_to_be32(dip
->i_di
.di_flags
&
703 GFS2_DIF_INHERIT_DIRECTIO
);
704 di
->di_flags
|= cpu_to_be32(dip
->i_di
.di_flags
&
705 GFS2_DIF_INHERIT_JDATA
);
709 di
->di_payload_format
= cpu_to_be32(S_ISDIR(mode
) ? GFS2_FORMAT_DE
: 0);
715 memset(&di
->__pad4
, 0, sizeof(di
->__pad4
));
717 di
->di_atime_nsec
= cpu_to_be32(tv
.tv_nsec
);
718 di
->di_mtime_nsec
= cpu_to_be32(tv
.tv_nsec
);
719 di
->di_ctime_nsec
= cpu_to_be32(tv
.tv_nsec
);
720 memset(&di
->di_reserved
, 0, sizeof(di
->di_reserved
));
725 static int make_dinode(struct gfs2_inode
*dip
, struct gfs2_glock
*gl
,
726 unsigned int mode
, const struct gfs2_inum_host
*inum
,
727 const u64
*generation
, dev_t dev
)
729 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
730 unsigned int uid
, gid
;
733 munge_mode_uid_gid(dip
, &mode
, &uid
, &gid
);
736 error
= gfs2_quota_lock(dip
, uid
, gid
);
740 error
= gfs2_quota_check(dip
, uid
, gid
);
744 error
= gfs2_trans_begin(sdp
, RES_DINODE
+ RES_QUOTA
, 0);
748 init_dinode(dip
, gl
, inum
, mode
, uid
, gid
, generation
, dev
);
749 gfs2_quota_change(dip
, +1, uid
, gid
);
753 gfs2_quota_unlock(dip
);
759 static int link_dinode(struct gfs2_inode
*dip
, const struct qstr
*name
,
760 struct gfs2_inode
*ip
)
762 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
763 struct gfs2_alloc
*al
;
765 struct buffer_head
*dibh
;
768 al
= gfs2_alloc_get(dip
);
770 error
= gfs2_quota_lock(dip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
774 error
= alloc_required
= gfs2_diradd_alloc_required(&dip
->i_inode
, name
);
775 if (alloc_required
< 0)
777 if (alloc_required
) {
778 error
= gfs2_quota_check(dip
, dip
->i_inode
.i_uid
, dip
->i_inode
.i_gid
);
780 goto fail_quota_locks
;
782 al
->al_requested
= sdp
->sd_max_dirres
;
784 error
= gfs2_inplace_reserve(dip
);
786 goto fail_quota_locks
;
788 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
789 al
->al_rgd
->rd_length
+
791 RES_STATFS
+ RES_QUOTA
, 0);
795 error
= gfs2_trans_begin(sdp
, RES_LEAF
+ 2 * RES_DINODE
, 0);
797 goto fail_quota_locks
;
800 error
= gfs2_dir_add(&dip
->i_inode
, name
, ip
, IF2DT(ip
->i_inode
.i_mode
));
804 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
807 ip
->i_inode
.i_nlink
= 1;
808 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
809 gfs2_dinode_out(ip
, dibh
->b_data
);
817 if (dip
->i_alloc
.al_rgd
)
818 gfs2_inplace_release(dip
);
821 gfs2_quota_unlock(dip
);
828 static int gfs2_security_init(struct gfs2_inode
*dip
, struct gfs2_inode
*ip
)
834 struct gfs2_ea_request er
;
836 err
= security_inode_init_security(&ip
->i_inode
, &dip
->i_inode
,
837 &name
, &value
, &len
);
840 if (err
== -EOPNOTSUPP
)
845 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
847 er
.er_type
= GFS2_EATYPE_SECURITY
;
850 er
.er_name_len
= strlen(name
);
851 er
.er_data_len
= len
;
853 err
= gfs2_ea_set_i(ip
, &er
);
862 * gfs2_createi - Create a new inode
863 * @ghs: An array of two holders
864 * @name: The name of the new file
865 * @mode: the permissions on the new inode
867 * @ghs[0] is an initialized holder for the directory
868 * @ghs[1] is the holder for the inode lock
870 * If the return value is not NULL, the glocks on both the directory and the new
871 * file are held. A transaction has been started and an inplace reservation
877 struct inode
*gfs2_createi(struct gfs2_holder
*ghs
, const struct qstr
*name
,
878 unsigned int mode
, dev_t dev
)
880 struct inode
*inode
= NULL
;
881 struct gfs2_inode
*dip
= ghs
->gh_gl
->gl_object
;
882 struct inode
*dir
= &dip
->i_inode
;
883 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
884 struct gfs2_inum_host inum
= { .no_addr
= 0, .no_formal_ino
= 0 };
888 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
889 return ERR_PTR(-ENAMETOOLONG
);
891 gfs2_holder_reinit(LM_ST_EXCLUSIVE
, 0, ghs
);
892 error
= gfs2_glock_nq(ghs
);
896 error
= create_ok(dip
, name
, mode
);
900 error
= pick_formal_ino(sdp
, &inum
.no_formal_ino
);
904 error
= alloc_dinode(dip
, &inum
.no_addr
, &generation
);
908 error
= gfs2_glock_nq_num(sdp
, inum
.no_addr
, &gfs2_inode_glops
,
909 LM_ST_EXCLUSIVE
, GL_SKIP
, ghs
+ 1);
913 error
= make_dinode(dip
, ghs
[1].gh_gl
, mode
, &inum
, &generation
, dev
);
917 inode
= gfs2_inode_lookup(dir
->i_sb
, inum
.no_addr
, IF2DT(mode
));
921 error
= gfs2_inode_refresh(GFS2_I(inode
));
925 error
= gfs2_acl_create(dip
, GFS2_I(inode
));
929 error
= gfs2_security_init(dip
, GFS2_I(inode
));
933 error
= link_dinode(dip
, name
, GFS2_I(inode
));
938 return ERR_PTR(-ENOMEM
);
942 gfs2_glock_dq_uninit(ghs
+ 1);
948 return ERR_PTR(error
);
952 * gfs2_rmdiri - Remove a directory
953 * @dip: The parent directory of the directory to be removed
954 * @name: The name of the directory to be removed
955 * @ip: The GFS2 inode of the directory to be removed
957 * Assumes Glocks on dip and ip are held
962 int gfs2_rmdiri(struct gfs2_inode
*dip
, const struct qstr
*name
,
963 struct gfs2_inode
*ip
)
968 if (ip
->i_di
.di_entries
!= 2) {
969 if (gfs2_consist_inode(ip
))
970 gfs2_dinode_print(ip
);
974 error
= gfs2_dir_del(dip
, name
);
978 error
= gfs2_change_nlink(dip
, -1);
982 gfs2_str2qstr(&dotname
, ".");
983 error
= gfs2_dir_del(ip
, &dotname
);
987 gfs2_str2qstr(&dotname
, "..");
988 error
= gfs2_dir_del(ip
, &dotname
);
992 /* It looks odd, but it really should be done twice */
993 error
= gfs2_change_nlink(ip
, -1);
997 error
= gfs2_change_nlink(ip
, -1);
1005 * gfs2_unlink_ok - check to see that a inode is still in a directory
1006 * @dip: the directory
1007 * @name: the name of the file
1010 * Assumes that the lock on (at least) @dip is held.
1012 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1015 int gfs2_unlink_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
1016 const struct gfs2_inode
*ip
)
1020 if (IS_IMMUTABLE(&ip
->i_inode
) || IS_APPEND(&ip
->i_inode
))
1023 if ((dip
->i_inode
.i_mode
& S_ISVTX
) &&
1024 dip
->i_inode
.i_uid
!= current
->fsuid
&&
1025 ip
->i_inode
.i_uid
!= current
->fsuid
&& !capable(CAP_FOWNER
))
1028 if (IS_APPEND(&dip
->i_inode
))
1031 error
= permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
, NULL
);
1035 error
= gfs2_dir_check(&dip
->i_inode
, name
, ip
);
1043 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1047 * Follow @to back to the root and make sure we don't encounter @this
1048 * Assumes we already hold the rename lock.
1053 int gfs2_ok_to_move(struct gfs2_inode
*this, struct gfs2_inode
*to
)
1055 struct inode
*dir
= &to
->i_inode
;
1056 struct super_block
*sb
= dir
->i_sb
;
1061 gfs2_str2qstr(&dotdot
, "..");
1066 if (dir
== &this->i_inode
) {
1070 if (dir
== sb
->s_root
->d_inode
) {
1075 tmp
= gfs2_lookupi(dir
, &dotdot
, 1, NULL
);
1077 error
= PTR_ERR(tmp
);
1091 * gfs2_readlinki - return the contents of a symlink
1092 * @ip: the symlink's inode
1093 * @buf: a pointer to the buffer to be filled
1094 * @len: a pointer to the length of @buf
1096 * If @buf is too small, a piece of memory is kmalloc()ed and needs
1097 * to be freed by the caller.
1102 int gfs2_readlinki(struct gfs2_inode
*ip
, char **buf
, unsigned int *len
)
1104 struct gfs2_holder i_gh
;
1105 struct buffer_head
*dibh
;
1109 gfs2_holder_init(ip
->i_gl
, LM_ST_SHARED
, GL_ATIME
, &i_gh
);
1110 error
= gfs2_glock_nq_atime(&i_gh
);
1112 gfs2_holder_uninit(&i_gh
);
1116 if (!ip
->i_di
.di_size
) {
1117 gfs2_consist_inode(ip
);
1122 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1126 x
= ip
->i_di
.di_size
+ 1;
1128 *buf
= kmalloc(x
, GFP_KERNEL
);
1135 memcpy(*buf
, dibh
->b_data
+ sizeof(struct gfs2_dinode
), x
);
1141 gfs2_glock_dq_uninit(&i_gh
);
1146 * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
1147 * conditionally update the inode's atime
1148 * @gh: the holder to acquire
1150 * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
1151 * Update if the difference between the current time and the inode's current
1152 * atime is greater than an interval specified at mount.
1157 int gfs2_glock_nq_atime(struct gfs2_holder
*gh
)
1159 struct gfs2_glock
*gl
= gh
->gh_gl
;
1160 struct gfs2_sbd
*sdp
= gl
->gl_sbd
;
1161 struct gfs2_inode
*ip
= gl
->gl_object
;
1162 s64 quantum
= gfs2_tune_get(sdp
, gt_atime_quantum
);
1166 struct timespec tv
= CURRENT_TIME
;
1168 if (gfs2_assert_warn(sdp
, gh
->gh_flags
& GL_ATIME
) ||
1169 gfs2_assert_warn(sdp
, !(gh
->gh_flags
& GL_ASYNC
)) ||
1170 gfs2_assert_warn(sdp
, gl
->gl_ops
== &gfs2_inode_glops
))
1173 state
= gh
->gh_state
;
1174 flags
= gh
->gh_flags
;
1176 error
= gfs2_glock_nq(gh
);
1180 if (test_bit(SDF_NOATIME
, &sdp
->sd_flags
) ||
1181 (sdp
->sd_vfs
->s_flags
& MS_RDONLY
))
1184 if (tv
.tv_sec
- ip
->i_inode
.i_atime
.tv_sec
>= quantum
) {
1186 gfs2_holder_reinit(LM_ST_EXCLUSIVE
, gh
->gh_flags
& ~LM_FLAG_ANY
,
1188 error
= gfs2_glock_nq(gh
);
1192 /* Verify that atime hasn't been updated while we were
1193 trying to get exclusive lock. */
1196 if (tv
.tv_sec
- ip
->i_inode
.i_atime
.tv_sec
>= quantum
) {
1197 struct buffer_head
*dibh
;
1198 struct gfs2_dinode
*di
;
1200 error
= gfs2_trans_begin(sdp
, RES_DINODE
, 0);
1201 if (error
== -EROFS
)
1206 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1208 goto fail_end_trans
;
1210 ip
->i_inode
.i_atime
= tv
;
1212 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1213 di
= (struct gfs2_dinode
*)dibh
->b_data
;
1214 di
->di_atime
= cpu_to_be64(ip
->i_inode
.i_atime
.tv_sec
);
1215 di
->di_atime_nsec
= cpu_to_be32(ip
->i_inode
.i_atime
.tv_nsec
);
1218 gfs2_trans_end(sdp
);
1221 /* If someone else has asked for the glock,
1222 unlock and let them have it. Then reacquire
1223 in the original state. */
1224 if (gfs2_glock_is_blocking(gl
)) {
1226 gfs2_holder_reinit(state
, flags
, gh
);
1227 return gfs2_glock_nq(gh
);
1234 gfs2_trans_end(sdp
);
1241 __gfs2_setattr_simple(struct gfs2_inode
*ip
, struct iattr
*attr
)
1243 struct buffer_head
*dibh
;
1246 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1248 error
= inode_setattr(&ip
->i_inode
, attr
);
1249 gfs2_assert_warn(GFS2_SB(&ip
->i_inode
), !error
);
1250 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1251 gfs2_dinode_out(ip
, dibh
->b_data
);
1258 * gfs2_setattr_simple -
1262 * Called with a reference on the vnode.
1267 int gfs2_setattr_simple(struct gfs2_inode
*ip
, struct iattr
*attr
)
1271 if (current
->journal_info
)
1272 return __gfs2_setattr_simple(ip
, attr
);
1274 error
= gfs2_trans_begin(GFS2_SB(&ip
->i_inode
), RES_DINODE
, 0);
1278 error
= __gfs2_setattr_simple(ip
, attr
);
1279 gfs2_trans_end(GFS2_SB(&ip
->i_inode
));
1283 void gfs2_dinode_out(const struct gfs2_inode
*ip
, void *buf
)
1285 const struct gfs2_dinode_host
*di
= &ip
->i_di
;
1286 struct gfs2_dinode
*str
= buf
;
1288 str
->di_header
.mh_magic
= cpu_to_be32(GFS2_MAGIC
);
1289 str
->di_header
.mh_type
= cpu_to_be32(GFS2_METATYPE_DI
);
1290 str
->di_header
.__pad0
= 0;
1291 str
->di_header
.mh_format
= cpu_to_be32(GFS2_FORMAT_DI
);
1292 str
->di_header
.__pad1
= 0;
1293 str
->di_num
.no_addr
= cpu_to_be64(ip
->i_no_addr
);
1294 str
->di_num
.no_formal_ino
= cpu_to_be64(ip
->i_no_formal_ino
);
1295 str
->di_mode
= cpu_to_be32(ip
->i_inode
.i_mode
);
1296 str
->di_uid
= cpu_to_be32(ip
->i_inode
.i_uid
);
1297 str
->di_gid
= cpu_to_be32(ip
->i_inode
.i_gid
);
1298 str
->di_nlink
= cpu_to_be32(ip
->i_inode
.i_nlink
);
1299 str
->di_size
= cpu_to_be64(di
->di_size
);
1300 str
->di_blocks
= cpu_to_be64(di
->di_blocks
);
1301 str
->di_atime
= cpu_to_be64(ip
->i_inode
.i_atime
.tv_sec
);
1302 str
->di_mtime
= cpu_to_be64(ip
->i_inode
.i_mtime
.tv_sec
);
1303 str
->di_ctime
= cpu_to_be64(ip
->i_inode
.i_ctime
.tv_sec
);
1305 str
->di_goal_meta
= cpu_to_be64(di
->di_goal_meta
);
1306 str
->di_goal_data
= cpu_to_be64(di
->di_goal_data
);
1307 str
->di_generation
= cpu_to_be64(di
->di_generation
);
1309 str
->di_flags
= cpu_to_be32(di
->di_flags
);
1310 str
->di_height
= cpu_to_be16(di
->di_height
);
1311 str
->di_payload_format
= cpu_to_be32(S_ISDIR(ip
->i_inode
.i_mode
) &&
1312 !(ip
->i_di
.di_flags
& GFS2_DIF_EXHASH
) ?
1313 GFS2_FORMAT_DE
: 0);
1314 str
->di_depth
= cpu_to_be16(di
->di_depth
);
1315 str
->di_entries
= cpu_to_be32(di
->di_entries
);
1317 str
->di_eattr
= cpu_to_be64(di
->di_eattr
);
1318 str
->di_atime_nsec
= cpu_to_be32(ip
->i_inode
.i_atime
.tv_nsec
);
1319 str
->di_mtime_nsec
= cpu_to_be32(ip
->i_inode
.i_mtime
.tv_nsec
);
1320 str
->di_ctime_nsec
= cpu_to_be32(ip
->i_inode
.i_ctime
.tv_nsec
);
1323 void gfs2_dinode_print(const struct gfs2_inode
*ip
)
1325 const struct gfs2_dinode_host
*di
= &ip
->i_di
;
1327 printk(KERN_INFO
" no_formal_ino = %llu\n",
1328 (unsigned long long)ip
->i_no_formal_ino
);
1329 printk(KERN_INFO
" no_addr = %llu\n",
1330 (unsigned long long)ip
->i_no_addr
);
1331 printk(KERN_INFO
" di_size = %llu\n", (unsigned long long)di
->di_size
);
1332 printk(KERN_INFO
" di_blocks = %llu\n",
1333 (unsigned long long)di
->di_blocks
);
1334 printk(KERN_INFO
" di_goal_meta = %llu\n",
1335 (unsigned long long)di
->di_goal_meta
);
1336 printk(KERN_INFO
" di_goal_data = %llu\n",
1337 (unsigned long long)di
->di_goal_data
);
1338 printk(KERN_INFO
" di_flags = 0x%.8X\n", di
->di_flags
);
1339 printk(KERN_INFO
" di_height = %u\n", di
->di_height
);
1340 printk(KERN_INFO
" di_depth = %u\n", di
->di_depth
);
1341 printk(KERN_INFO
" di_entries = %u\n", di
->di_entries
);
1342 printk(KERN_INFO
" di_eattr = %llu\n",
1343 (unsigned long long)di
->di_eattr
);