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 static int iget_test(struct inode
*inode
, void *opaque
)
43 struct gfs2_inode
*ip
= GFS2_I(inode
);
44 u64
*no_addr
= opaque
;
46 if (ip
->i_no_addr
== *no_addr
&&
47 inode
->i_private
!= NULL
)
53 static int iget_set(struct inode
*inode
, void *opaque
)
55 struct gfs2_inode
*ip
= GFS2_I(inode
);
56 u64
*no_addr
= opaque
;
58 inode
->i_ino
= (unsigned long)*no_addr
;
59 ip
->i_no_addr
= *no_addr
;
63 struct inode
*gfs2_ilookup(struct super_block
*sb
, u64 no_addr
)
65 unsigned long hash
= (unsigned long)no_addr
;
66 return ilookup5(sb
, hash
, iget_test
, &no_addr
);
69 static struct inode
*gfs2_iget(struct super_block
*sb
, u64 no_addr
)
71 unsigned long hash
= (unsigned long)no_addr
;
72 return iget5_locked(sb
, hash
, iget_test
, iget_set
, &no_addr
);
76 * gfs2_inode_lookup - Lookup an inode
77 * @sb: The super block
78 * @no_addr: The inode number
79 * @type: The type of the inode
81 * Returns: A VFS inode, or an error
84 struct inode
*gfs2_inode_lookup(struct super_block
*sb
, u64 no_addr
, unsigned int type
)
86 struct inode
*inode
= gfs2_iget(sb
, no_addr
);
87 struct gfs2_inode
*ip
= GFS2_I(inode
);
88 struct gfs2_glock
*io_gl
;
92 return ERR_PTR(-ENOBUFS
);
94 if (inode
->i_state
& I_NEW
) {
95 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
96 umode_t mode
= DT2IF(type
);
97 inode
->i_private
= ip
;
101 inode
->i_op
= &gfs2_file_iops
;
102 inode
->i_fop
= &gfs2_file_fops
;
103 inode
->i_mapping
->a_ops
= &gfs2_file_aops
;
104 } else if (S_ISDIR(mode
)) {
105 inode
->i_op
= &gfs2_dir_iops
;
106 inode
->i_fop
= &gfs2_dir_fops
;
107 } else if (S_ISLNK(mode
)) {
108 inode
->i_op
= &gfs2_symlink_iops
;
110 inode
->i_op
= &gfs2_dev_iops
;
113 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_inode_glops
, CREATE
, &ip
->i_gl
);
116 ip
->i_gl
->gl_object
= ip
;
118 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_iopen_glops
, CREATE
, &io_gl
);
122 set_bit(GIF_INVALID
, &ip
->i_flags
);
123 error
= gfs2_glock_nq_init(io_gl
, LM_ST_SHARED
, GL_EXACT
, &ip
->i_iopen_gh
);
127 gfs2_glock_put(io_gl
);
128 unlock_new_inode(inode
);
133 gfs2_glock_put(io_gl
);
135 ip
->i_gl
->gl_object
= NULL
;
136 gfs2_glock_put(ip
->i_gl
);
139 return ERR_PTR(error
);
142 static int gfs2_dinode_in(struct gfs2_inode
*ip
, const void *buf
)
144 struct gfs2_dinode_host
*di
= &ip
->i_di
;
145 const struct gfs2_dinode
*str
= buf
;
147 if (ip
->i_no_addr
!= be64_to_cpu(str
->di_num
.no_addr
)) {
148 if (gfs2_consist_inode(ip
))
149 gfs2_dinode_print(ip
);
152 ip
->i_no_formal_ino
= be64_to_cpu(str
->di_num
.no_formal_ino
);
153 ip
->i_inode
.i_mode
= be32_to_cpu(str
->di_mode
);
154 ip
->i_inode
.i_rdev
= 0;
155 switch (ip
->i_inode
.i_mode
& S_IFMT
) {
158 ip
->i_inode
.i_rdev
= MKDEV(be32_to_cpu(str
->di_major
),
159 be32_to_cpu(str
->di_minor
));
163 ip
->i_inode
.i_uid
= be32_to_cpu(str
->di_uid
);
164 ip
->i_inode
.i_gid
= be32_to_cpu(str
->di_gid
);
166 * We will need to review setting the nlink count here in the
167 * light of the forthcoming ro bind mount work. This is a reminder
170 ip
->i_inode
.i_nlink
= be32_to_cpu(str
->di_nlink
);
171 di
->di_size
= be64_to_cpu(str
->di_size
);
172 i_size_write(&ip
->i_inode
, di
->di_size
);
173 di
->di_blocks
= be64_to_cpu(str
->di_blocks
);
174 gfs2_set_inode_blocks(&ip
->i_inode
);
175 ip
->i_inode
.i_atime
.tv_sec
= be64_to_cpu(str
->di_atime
);
176 ip
->i_inode
.i_atime
.tv_nsec
= 0;
177 ip
->i_inode
.i_mtime
.tv_sec
= be64_to_cpu(str
->di_mtime
);
178 ip
->i_inode
.i_mtime
.tv_nsec
= 0;
179 ip
->i_inode
.i_ctime
.tv_sec
= be64_to_cpu(str
->di_ctime
);
180 ip
->i_inode
.i_ctime
.tv_nsec
= 0;
182 di
->di_goal_meta
= be64_to_cpu(str
->di_goal_meta
);
183 di
->di_goal_data
= be64_to_cpu(str
->di_goal_data
);
184 di
->di_generation
= be64_to_cpu(str
->di_generation
);
186 di
->di_flags
= be32_to_cpu(str
->di_flags
);
187 gfs2_set_inode_flags(&ip
->i_inode
);
188 di
->di_height
= be16_to_cpu(str
->di_height
);
190 di
->di_depth
= be16_to_cpu(str
->di_depth
);
191 di
->di_entries
= be32_to_cpu(str
->di_entries
);
193 di
->di_eattr
= be64_to_cpu(str
->di_eattr
);
198 * gfs2_inode_refresh - Refresh the incore copy of the dinode
199 * @ip: The GFS2 inode
204 int gfs2_inode_refresh(struct gfs2_inode
*ip
)
206 struct buffer_head
*dibh
;
209 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
213 if (gfs2_metatype_check(GFS2_SB(&ip
->i_inode
), dibh
, GFS2_METATYPE_DI
)) {
218 error
= gfs2_dinode_in(ip
, dibh
->b_data
);
220 clear_bit(GIF_INVALID
, &ip
->i_flags
);
225 int gfs2_dinode_dealloc(struct gfs2_inode
*ip
)
227 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
228 struct gfs2_alloc
*al
;
229 struct gfs2_rgrpd
*rgd
;
232 if (ip
->i_di
.di_blocks
!= 1) {
233 if (gfs2_consist_inode(ip
))
234 gfs2_dinode_print(ip
);
238 al
= gfs2_alloc_get(ip
);
240 error
= gfs2_quota_hold(ip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
244 error
= gfs2_rindex_hold(sdp
, &al
->al_ri_gh
);
248 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_no_addr
);
250 gfs2_consist_inode(ip
);
252 goto out_rindex_relse
;
255 error
= gfs2_glock_nq_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0,
258 goto out_rindex_relse
;
260 error
= gfs2_trans_begin(sdp
, RES_RG_BIT
+ RES_STATFS
+ RES_QUOTA
, 1);
264 gfs2_trans_add_gl(ip
->i_gl
);
266 gfs2_free_di(rgd
, ip
);
269 clear_bit(GLF_STICKY
, &ip
->i_gl
->gl_flags
);
272 gfs2_glock_dq_uninit(&al
->al_rgd_gh
);
274 gfs2_glock_dq_uninit(&al
->al_ri_gh
);
276 gfs2_quota_unhold(ip
);
283 * gfs2_change_nlink - Change nlink count on inode
284 * @ip: The GFS2 inode
285 * @diff: The change in the nlink count required
289 int gfs2_change_nlink(struct gfs2_inode
*ip
, int diff
)
291 struct buffer_head
*dibh
;
295 BUG_ON(diff
!= 1 && diff
!= -1);
296 nlink
= ip
->i_inode
.i_nlink
+ diff
;
298 /* If we are reducing the nlink count, but the new value ends up being
299 bigger than the old one, we must have underflowed. */
300 if (diff
< 0 && nlink
> ip
->i_inode
.i_nlink
) {
301 if (gfs2_consist_inode(ip
))
302 gfs2_dinode_print(ip
);
306 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
311 inc_nlink(&ip
->i_inode
);
313 drop_nlink(&ip
->i_inode
);
315 ip
->i_inode
.i_ctime
= CURRENT_TIME_SEC
;
317 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
318 gfs2_dinode_out(ip
, dibh
->b_data
);
320 mark_inode_dirty(&ip
->i_inode
);
322 if (ip
->i_inode
.i_nlink
== 0)
323 gfs2_unlink_di(&ip
->i_inode
); /* mark inode unlinked */
328 struct inode
*gfs2_lookup_simple(struct inode
*dip
, const char *name
)
332 gfs2_str2qstr(&qstr
, name
);
333 inode
= gfs2_lookupi(dip
, &qstr
, 1, NULL
);
334 /* gfs2_lookupi has inconsistent callers: vfs
335 * related routines expect NULL for no entry found,
336 * gfs2_lookup_simple callers expect ENOENT
337 * and do not check for NULL.
340 return ERR_PTR(-ENOENT
);
347 * gfs2_lookupi - Look up a filename in a directory and return its inode
348 * @d_gh: An initialized holder for the directory glock
349 * @name: The name of the inode to look for
350 * @is_root: If 1, ignore the caller's permissions
351 * @i_gh: An uninitialized holder for the new inode glock
353 * This can be called via the VFS filldir function when NFS is doing
354 * a readdirplus and the inode which its intending to stat isn't
355 * already in cache. In this case we must not take the directory glock
356 * again, since the readdir call will have already taken that lock.
361 struct inode
*gfs2_lookupi(struct inode
*dir
, const struct qstr
*name
,
362 int is_root
, struct nameidata
*nd
)
364 struct super_block
*sb
= dir
->i_sb
;
365 struct gfs2_inode
*dip
= GFS2_I(dir
);
366 struct gfs2_holder d_gh
;
368 struct inode
*inode
= NULL
;
371 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
372 return ERR_PTR(-ENAMETOOLONG
);
374 if ((name
->len
== 1 && memcmp(name
->name
, ".", 1) == 0) ||
375 (name
->len
== 2 && memcmp(name
->name
, "..", 2) == 0 &&
376 dir
== sb
->s_root
->d_inode
)) {
381 if (gfs2_glock_is_locked_by_me(dip
->i_gl
) == 0) {
382 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_SHARED
, 0, &d_gh
);
384 return ERR_PTR(error
);
389 error
= permission(dir
, MAY_EXEC
, NULL
);
394 inode
= gfs2_dir_search(dir
, name
);
396 error
= PTR_ERR(inode
);
399 gfs2_glock_dq_uninit(&d_gh
);
400 if (error
== -ENOENT
)
402 return inode
? inode
: ERR_PTR(error
);
405 static int pick_formal_ino_1(struct gfs2_sbd
*sdp
, u64
*formal_ino
)
407 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_ir_inode
);
408 struct buffer_head
*bh
;
409 struct gfs2_inum_range_host ir
;
412 error
= gfs2_trans_begin(sdp
, RES_DINODE
, 0);
415 mutex_lock(&sdp
->sd_inum_mutex
);
417 error
= gfs2_meta_inode_buffer(ip
, &bh
);
419 mutex_unlock(&sdp
->sd_inum_mutex
);
424 gfs2_inum_range_in(&ir
, bh
->b_data
+ sizeof(struct gfs2_dinode
));
427 *formal_ino
= ir
.ir_start
++;
429 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
430 gfs2_inum_range_out(&ir
,
431 bh
->b_data
+ sizeof(struct gfs2_dinode
));
433 mutex_unlock(&sdp
->sd_inum_mutex
);
440 mutex_unlock(&sdp
->sd_inum_mutex
);
446 static int pick_formal_ino_2(struct gfs2_sbd
*sdp
, u64
*formal_ino
)
448 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_ir_inode
);
449 struct gfs2_inode
*m_ip
= GFS2_I(sdp
->sd_inum_inode
);
450 struct gfs2_holder gh
;
451 struct buffer_head
*bh
;
452 struct gfs2_inum_range_host ir
;
455 error
= gfs2_glock_nq_init(m_ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &gh
);
459 error
= gfs2_trans_begin(sdp
, 2 * RES_DINODE
, 0);
462 mutex_lock(&sdp
->sd_inum_mutex
);
464 error
= gfs2_meta_inode_buffer(ip
, &bh
);
468 gfs2_inum_range_in(&ir
, bh
->b_data
+ sizeof(struct gfs2_dinode
));
471 struct buffer_head
*m_bh
;
475 error
= gfs2_meta_inode_buffer(m_ip
, &m_bh
);
479 z
= *(__be64
*)(m_bh
->b_data
+ sizeof(struct gfs2_dinode
));
480 x
= y
= be64_to_cpu(z
);
482 ir
.ir_length
= GFS2_INUM_QUANTUM
;
483 x
+= GFS2_INUM_QUANTUM
;
485 gfs2_consist_inode(m_ip
);
487 gfs2_trans_add_bh(m_ip
->i_gl
, m_bh
, 1);
488 *(__be64
*)(m_bh
->b_data
+ sizeof(struct gfs2_dinode
)) = z
;
493 *formal_ino
= ir
.ir_start
++;
496 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
497 gfs2_inum_range_out(&ir
, bh
->b_data
+ sizeof(struct gfs2_dinode
));
502 mutex_unlock(&sdp
->sd_inum_mutex
);
505 gfs2_glock_dq_uninit(&gh
);
509 static int pick_formal_ino(struct gfs2_sbd
*sdp
, u64
*inum
)
513 error
= pick_formal_ino_1(sdp
, inum
);
517 error
= pick_formal_ino_2(sdp
, inum
);
523 * create_ok - OK to create a new on-disk inode here?
524 * @dip: Directory in which dinode is to be created
525 * @name: Name of new dinode
531 static int create_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
536 error
= permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
, NULL
);
540 /* Don't create entries in an unlinked directory */
541 if (!dip
->i_inode
.i_nlink
)
544 error
= gfs2_dir_check(&dip
->i_inode
, name
, NULL
);
555 if (dip
->i_di
.di_entries
== (u32
)-1)
557 if (S_ISDIR(mode
) && dip
->i_inode
.i_nlink
== (u32
)-1)
563 static void munge_mode_uid_gid(struct gfs2_inode
*dip
, unsigned int *mode
,
564 unsigned int *uid
, unsigned int *gid
)
566 if (GFS2_SB(&dip
->i_inode
)->sd_args
.ar_suiddir
&&
567 (dip
->i_inode
.i_mode
& S_ISUID
) && dip
->i_inode
.i_uid
) {
570 else if (dip
->i_inode
.i_uid
!= current
->fsuid
)
572 *uid
= dip
->i_inode
.i_uid
;
574 *uid
= current
->fsuid
;
576 if (dip
->i_inode
.i_mode
& S_ISGID
) {
579 *gid
= dip
->i_inode
.i_gid
;
581 *gid
= current
->fsgid
;
584 static int alloc_dinode(struct gfs2_inode
*dip
, u64
*no_addr
, u64
*generation
)
586 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
591 dip
->i_alloc
.al_requested
= RES_DINODE
;
592 error
= gfs2_inplace_reserve(dip
);
596 error
= gfs2_trans_begin(sdp
, RES_RG_BIT
+ RES_STATFS
, 0);
600 *no_addr
= gfs2_alloc_di(dip
, generation
);
605 gfs2_inplace_release(dip
);
612 * init_dinode - Fill in a new dinode structure
613 * @dip: the directory this inode is being created in
614 * @gl: The glock covering the new inode
615 * @inum: the inode number
616 * @mode: the file permissions
622 static void init_dinode(struct gfs2_inode
*dip
, struct gfs2_glock
*gl
,
623 const struct gfs2_inum_host
*inum
, unsigned int mode
,
624 unsigned int uid
, unsigned int gid
,
625 const u64
*generation
, dev_t dev
)
627 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
628 struct gfs2_dinode
*di
;
629 struct buffer_head
*dibh
;
631 dibh
= gfs2_meta_new(gl
, inum
->no_addr
);
632 gfs2_trans_add_bh(gl
, dibh
, 1);
633 gfs2_metatype_set(dibh
, GFS2_METATYPE_DI
, GFS2_FORMAT_DI
);
634 gfs2_buffer_clear_tail(dibh
, sizeof(struct gfs2_dinode
));
635 di
= (struct gfs2_dinode
*)dibh
->b_data
;
637 di
->di_num
.no_formal_ino
= cpu_to_be64(inum
->no_formal_ino
);
638 di
->di_num
.no_addr
= cpu_to_be64(inum
->no_addr
);
639 di
->di_mode
= cpu_to_be32(mode
);
640 di
->di_uid
= cpu_to_be32(uid
);
641 di
->di_gid
= cpu_to_be32(gid
);
644 di
->di_blocks
= cpu_to_be64(1);
645 di
->di_atime
= di
->di_mtime
= di
->di_ctime
= cpu_to_be64(get_seconds());
646 di
->di_major
= cpu_to_be32(MAJOR(dev
));
647 di
->di_minor
= cpu_to_be32(MINOR(dev
));
648 di
->di_goal_meta
= di
->di_goal_data
= cpu_to_be64(inum
->no_addr
);
649 di
->di_generation
= cpu_to_be64(*generation
);
653 if ((dip
->i_di
.di_flags
& GFS2_DIF_INHERIT_JDATA
) ||
654 gfs2_tune_get(sdp
, gt_new_files_jdata
))
655 di
->di_flags
|= cpu_to_be32(GFS2_DIF_JDATA
);
656 if ((dip
->i_di
.di_flags
& GFS2_DIF_INHERIT_DIRECTIO
) ||
657 gfs2_tune_get(sdp
, gt_new_files_directio
))
658 di
->di_flags
|= cpu_to_be32(GFS2_DIF_DIRECTIO
);
659 } else if (S_ISDIR(mode
)) {
660 di
->di_flags
|= cpu_to_be32(dip
->i_di
.di_flags
&
661 GFS2_DIF_INHERIT_DIRECTIO
);
662 di
->di_flags
|= cpu_to_be32(dip
->i_di
.di_flags
&
663 GFS2_DIF_INHERIT_JDATA
);
667 di
->di_payload_format
= cpu_to_be32(S_ISDIR(mode
) ? GFS2_FORMAT_DE
: 0);
673 memset(&di
->__pad4
, 0, sizeof(di
->__pad4
));
675 memset(&di
->di_reserved
, 0, sizeof(di
->di_reserved
));
680 static int make_dinode(struct gfs2_inode
*dip
, struct gfs2_glock
*gl
,
681 unsigned int mode
, const struct gfs2_inum_host
*inum
,
682 const u64
*generation
, dev_t dev
)
684 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
685 unsigned int uid
, gid
;
688 munge_mode_uid_gid(dip
, &mode
, &uid
, &gid
);
691 error
= gfs2_quota_lock(dip
, uid
, gid
);
695 error
= gfs2_quota_check(dip
, uid
, gid
);
699 error
= gfs2_trans_begin(sdp
, RES_DINODE
+ RES_QUOTA
, 0);
703 init_dinode(dip
, gl
, inum
, mode
, uid
, gid
, generation
, dev
);
704 gfs2_quota_change(dip
, +1, uid
, gid
);
708 gfs2_quota_unlock(dip
);
714 static int link_dinode(struct gfs2_inode
*dip
, const struct qstr
*name
,
715 struct gfs2_inode
*ip
)
717 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
718 struct gfs2_alloc
*al
;
720 struct buffer_head
*dibh
;
723 al
= gfs2_alloc_get(dip
);
725 error
= gfs2_quota_lock(dip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
729 error
= alloc_required
= gfs2_diradd_alloc_required(&dip
->i_inode
, name
);
730 if (alloc_required
< 0)
732 if (alloc_required
) {
733 error
= gfs2_quota_check(dip
, dip
->i_inode
.i_uid
, dip
->i_inode
.i_gid
);
735 goto fail_quota_locks
;
737 al
->al_requested
= sdp
->sd_max_dirres
;
739 error
= gfs2_inplace_reserve(dip
);
741 goto fail_quota_locks
;
743 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
744 al
->al_rgd
->rd_ri
.ri_length
+
746 RES_STATFS
+ RES_QUOTA
, 0);
750 error
= gfs2_trans_begin(sdp
, RES_LEAF
+ 2 * RES_DINODE
, 0);
752 goto fail_quota_locks
;
755 error
= gfs2_dir_add(&dip
->i_inode
, name
, ip
, IF2DT(ip
->i_inode
.i_mode
));
759 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
762 ip
->i_inode
.i_nlink
= 1;
763 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
764 gfs2_dinode_out(ip
, dibh
->b_data
);
772 if (dip
->i_alloc
.al_rgd
)
773 gfs2_inplace_release(dip
);
776 gfs2_quota_unlock(dip
);
783 static int gfs2_security_init(struct gfs2_inode
*dip
, struct gfs2_inode
*ip
)
789 struct gfs2_ea_request er
;
791 err
= security_inode_init_security(&ip
->i_inode
, &dip
->i_inode
,
792 &name
, &value
, &len
);
795 if (err
== -EOPNOTSUPP
)
800 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
802 er
.er_type
= GFS2_EATYPE_SECURITY
;
805 er
.er_name_len
= strlen(name
);
806 er
.er_data_len
= len
;
808 err
= gfs2_ea_set_i(ip
, &er
);
817 * gfs2_createi - Create a new inode
818 * @ghs: An array of two holders
819 * @name: The name of the new file
820 * @mode: the permissions on the new inode
822 * @ghs[0] is an initialized holder for the directory
823 * @ghs[1] is the holder for the inode lock
825 * If the return value is not NULL, the glocks on both the directory and the new
826 * file are held. A transaction has been started and an inplace reservation
832 struct inode
*gfs2_createi(struct gfs2_holder
*ghs
, const struct qstr
*name
,
833 unsigned int mode
, dev_t dev
)
836 struct gfs2_inode
*dip
= ghs
->gh_gl
->gl_object
;
837 struct inode
*dir
= &dip
->i_inode
;
838 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
839 struct gfs2_inum_host inum
= { .no_addr
= 0, .no_formal_ino
= 0 };
843 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
844 return ERR_PTR(-ENAMETOOLONG
);
846 gfs2_holder_reinit(LM_ST_EXCLUSIVE
, 0, ghs
);
847 error
= gfs2_glock_nq(ghs
);
851 error
= create_ok(dip
, name
, mode
);
855 error
= pick_formal_ino(sdp
, &inum
.no_formal_ino
);
859 error
= alloc_dinode(dip
, &inum
.no_addr
, &generation
);
863 error
= gfs2_glock_nq_num(sdp
, inum
.no_addr
, &gfs2_inode_glops
,
864 LM_ST_EXCLUSIVE
, GL_SKIP
, ghs
+ 1);
868 error
= make_dinode(dip
, ghs
[1].gh_gl
, mode
, &inum
, &generation
, dev
);
872 inode
= gfs2_inode_lookup(dir
->i_sb
, inum
.no_addr
, IF2DT(mode
));
876 error
= gfs2_inode_refresh(GFS2_I(inode
));
880 error
= gfs2_acl_create(dip
, GFS2_I(inode
));
884 error
= gfs2_security_init(dip
, GFS2_I(inode
));
888 error
= link_dinode(dip
, name
, GFS2_I(inode
));
893 return ERR_PTR(-ENOMEM
);
899 gfs2_glock_dq_uninit(ghs
+ 1);
903 return ERR_PTR(error
);
907 * gfs2_rmdiri - Remove a directory
908 * @dip: The parent directory of the directory to be removed
909 * @name: The name of the directory to be removed
910 * @ip: The GFS2 inode of the directory to be removed
912 * Assumes Glocks on dip and ip are held
917 int gfs2_rmdiri(struct gfs2_inode
*dip
, const struct qstr
*name
,
918 struct gfs2_inode
*ip
)
923 if (ip
->i_di
.di_entries
!= 2) {
924 if (gfs2_consist_inode(ip
))
925 gfs2_dinode_print(ip
);
929 error
= gfs2_dir_del(dip
, name
);
933 error
= gfs2_change_nlink(dip
, -1);
937 gfs2_str2qstr(&dotname
, ".");
938 error
= gfs2_dir_del(ip
, &dotname
);
942 gfs2_str2qstr(&dotname
, "..");
943 error
= gfs2_dir_del(ip
, &dotname
);
947 /* It looks odd, but it really should be done twice */
948 error
= gfs2_change_nlink(ip
, -1);
952 error
= gfs2_change_nlink(ip
, -1);
960 * gfs2_unlink_ok - check to see that a inode is still in a directory
961 * @dip: the directory
962 * @name: the name of the file
965 * Assumes that the lock on (at least) @dip is held.
967 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
970 int gfs2_unlink_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
971 const struct gfs2_inode
*ip
)
975 if (IS_IMMUTABLE(&ip
->i_inode
) || IS_APPEND(&ip
->i_inode
))
978 if ((dip
->i_inode
.i_mode
& S_ISVTX
) &&
979 dip
->i_inode
.i_uid
!= current
->fsuid
&&
980 ip
->i_inode
.i_uid
!= current
->fsuid
&& !capable(CAP_FOWNER
))
983 if (IS_APPEND(&dip
->i_inode
))
986 error
= permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
, NULL
);
990 error
= gfs2_dir_check(&dip
->i_inode
, name
, ip
);
998 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1002 * Follow @to back to the root and make sure we don't encounter @this
1003 * Assumes we already hold the rename lock.
1008 int gfs2_ok_to_move(struct gfs2_inode
*this, struct gfs2_inode
*to
)
1010 struct inode
*dir
= &to
->i_inode
;
1011 struct super_block
*sb
= dir
->i_sb
;
1016 gfs2_str2qstr(&dotdot
, "..");
1021 if (dir
== &this->i_inode
) {
1025 if (dir
== sb
->s_root
->d_inode
) {
1030 tmp
= gfs2_lookupi(dir
, &dotdot
, 1, NULL
);
1032 error
= PTR_ERR(tmp
);
1046 * gfs2_readlinki - return the contents of a symlink
1047 * @ip: the symlink's inode
1048 * @buf: a pointer to the buffer to be filled
1049 * @len: a pointer to the length of @buf
1051 * If @buf is too small, a piece of memory is kmalloc()ed and needs
1052 * to be freed by the caller.
1057 int gfs2_readlinki(struct gfs2_inode
*ip
, char **buf
, unsigned int *len
)
1059 struct gfs2_holder i_gh
;
1060 struct buffer_head
*dibh
;
1064 gfs2_holder_init(ip
->i_gl
, LM_ST_SHARED
, GL_ATIME
, &i_gh
);
1065 error
= gfs2_glock_nq_atime(&i_gh
);
1067 gfs2_holder_uninit(&i_gh
);
1071 if (!ip
->i_di
.di_size
) {
1072 gfs2_consist_inode(ip
);
1077 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1081 x
= ip
->i_di
.di_size
+ 1;
1083 *buf
= kmalloc(x
, GFP_KERNEL
);
1090 memcpy(*buf
, dibh
->b_data
+ sizeof(struct gfs2_dinode
), x
);
1096 gfs2_glock_dq_uninit(&i_gh
);
1101 * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
1102 * conditionally update the inode's atime
1103 * @gh: the holder to acquire
1105 * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
1106 * Update if the difference between the current time and the inode's current
1107 * atime is greater than an interval specified at mount.
1112 int gfs2_glock_nq_atime(struct gfs2_holder
*gh
)
1114 struct gfs2_glock
*gl
= gh
->gh_gl
;
1115 struct gfs2_sbd
*sdp
= gl
->gl_sbd
;
1116 struct gfs2_inode
*ip
= gl
->gl_object
;
1117 s64 curtime
, quantum
= gfs2_tune_get(sdp
, gt_atime_quantum
);
1122 if (gfs2_assert_warn(sdp
, gh
->gh_flags
& GL_ATIME
) ||
1123 gfs2_assert_warn(sdp
, !(gh
->gh_flags
& GL_ASYNC
)) ||
1124 gfs2_assert_warn(sdp
, gl
->gl_ops
== &gfs2_inode_glops
))
1127 state
= gh
->gh_state
;
1128 flags
= gh
->gh_flags
;
1130 error
= gfs2_glock_nq(gh
);
1134 if (test_bit(SDF_NOATIME
, &sdp
->sd_flags
) ||
1135 (sdp
->sd_vfs
->s_flags
& MS_RDONLY
))
1138 curtime
= get_seconds();
1139 if (curtime
- ip
->i_inode
.i_atime
.tv_sec
>= quantum
) {
1141 gfs2_holder_reinit(LM_ST_EXCLUSIVE
, gh
->gh_flags
& ~LM_FLAG_ANY
,
1143 error
= gfs2_glock_nq(gh
);
1147 /* Verify that atime hasn't been updated while we were
1148 trying to get exclusive lock. */
1150 curtime
= get_seconds();
1151 if (curtime
- ip
->i_inode
.i_atime
.tv_sec
>= quantum
) {
1152 struct buffer_head
*dibh
;
1153 struct gfs2_dinode
*di
;
1155 error
= gfs2_trans_begin(sdp
, RES_DINODE
, 0);
1156 if (error
== -EROFS
)
1161 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1163 goto fail_end_trans
;
1165 ip
->i_inode
.i_atime
.tv_sec
= curtime
;
1167 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1168 di
= (struct gfs2_dinode
*)dibh
->b_data
;
1169 di
->di_atime
= cpu_to_be64(ip
->i_inode
.i_atime
.tv_sec
);
1172 gfs2_trans_end(sdp
);
1175 /* If someone else has asked for the glock,
1176 unlock and let them have it. Then reacquire
1177 in the original state. */
1178 if (gfs2_glock_is_blocking(gl
)) {
1180 gfs2_holder_reinit(state
, flags
, gh
);
1181 return gfs2_glock_nq(gh
);
1188 gfs2_trans_end(sdp
);
1195 __gfs2_setattr_simple(struct gfs2_inode
*ip
, struct iattr
*attr
)
1197 struct buffer_head
*dibh
;
1200 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1202 error
= inode_setattr(&ip
->i_inode
, attr
);
1203 gfs2_assert_warn(GFS2_SB(&ip
->i_inode
), !error
);
1204 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1205 gfs2_dinode_out(ip
, dibh
->b_data
);
1212 * gfs2_setattr_simple -
1216 * Called with a reference on the vnode.
1221 int gfs2_setattr_simple(struct gfs2_inode
*ip
, struct iattr
*attr
)
1225 if (current
->journal_info
)
1226 return __gfs2_setattr_simple(ip
, attr
);
1228 error
= gfs2_trans_begin(GFS2_SB(&ip
->i_inode
), RES_DINODE
, 0);
1232 error
= __gfs2_setattr_simple(ip
, attr
);
1233 gfs2_trans_end(GFS2_SB(&ip
->i_inode
));