2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2011 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/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/namei.h>
16 #include <linux/xattr.h>
17 #include <linux/posix_acl.h>
18 #include <linux/gfs2_ondisk.h>
19 #include <linux/crc32.h>
20 #include <linux/fiemap.h>
21 #include <linux/security.h>
22 #include <asm/uaccess.h>
40 struct gfs2_skip_data
{
46 static int iget_test(struct inode
*inode
, void *opaque
)
48 struct gfs2_inode
*ip
= GFS2_I(inode
);
49 struct gfs2_skip_data
*data
= opaque
;
51 if (ip
->i_no_addr
== data
->no_addr
) {
52 if (data
->non_block
&&
53 inode
->i_state
& (I_FREEING
|I_CLEAR
|I_WILL_FREE
)) {
62 static int iget_set(struct inode
*inode
, void *opaque
)
64 struct gfs2_inode
*ip
= GFS2_I(inode
);
65 struct gfs2_skip_data
*data
= opaque
;
69 inode
->i_ino
= (unsigned long)(data
->no_addr
);
70 ip
->i_no_addr
= data
->no_addr
;
74 struct inode
*gfs2_ilookup(struct super_block
*sb
, u64 no_addr
, int non_block
)
76 unsigned long hash
= (unsigned long)no_addr
;
77 struct gfs2_skip_data data
;
79 data
.no_addr
= no_addr
;
81 data
.non_block
= non_block
;
82 return ilookup5(sb
, hash
, iget_test
, &data
);
85 static struct inode
*gfs2_iget(struct super_block
*sb
, u64 no_addr
,
88 struct gfs2_skip_data data
;
89 unsigned long hash
= (unsigned long)no_addr
;
91 data
.no_addr
= no_addr
;
93 data
.non_block
= non_block
;
94 return iget5_locked(sb
, hash
, iget_test
, iget_set
, &data
);
98 * gfs2_set_iop - Sets inode operations
99 * @inode: The inode with correct i_mode filled in
101 * GFS2 lookup code fills in vfs inode contents based on info obtained
102 * from directory entry inside gfs2_inode_lookup().
105 static void gfs2_set_iop(struct inode
*inode
)
107 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
108 umode_t mode
= inode
->i_mode
;
111 inode
->i_op
= &gfs2_file_iops
;
112 if (gfs2_localflocks(sdp
))
113 inode
->i_fop
= &gfs2_file_fops_nolock
;
115 inode
->i_fop
= &gfs2_file_fops
;
116 } else if (S_ISDIR(mode
)) {
117 inode
->i_op
= &gfs2_dir_iops
;
118 if (gfs2_localflocks(sdp
))
119 inode
->i_fop
= &gfs2_dir_fops_nolock
;
121 inode
->i_fop
= &gfs2_dir_fops
;
122 } else if (S_ISLNK(mode
)) {
123 inode
->i_op
= &gfs2_symlink_iops
;
125 inode
->i_op
= &gfs2_file_iops
;
126 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
131 * gfs2_inode_lookup - Lookup an inode
132 * @sb: The super block
133 * @no_addr: The inode number
134 * @type: The type of the inode
135 * non_block: Can we block on inodes that are being freed?
137 * Returns: A VFS inode, or an error
140 struct inode
*gfs2_inode_lookup(struct super_block
*sb
, unsigned int type
,
141 u64 no_addr
, u64 no_formal_ino
, int non_block
)
144 struct gfs2_inode
*ip
;
145 struct gfs2_glock
*io_gl
= NULL
;
148 inode
= gfs2_iget(sb
, no_addr
, non_block
);
152 return ERR_PTR(-ENOBUFS
);
154 if (inode
->i_state
& I_NEW
) {
155 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
156 ip
->i_no_formal_ino
= no_formal_ino
;
158 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_inode_glops
, CREATE
, &ip
->i_gl
);
161 ip
->i_gl
->gl_object
= ip
;
163 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_iopen_glops
, CREATE
, &io_gl
);
167 set_bit(GIF_INVALID
, &ip
->i_flags
);
168 error
= gfs2_glock_nq_init(io_gl
, LM_ST_SHARED
, GL_EXACT
, &ip
->i_iopen_gh
);
172 ip
->i_iopen_gh
.gh_gl
->gl_object
= ip
;
173 gfs2_glock_put(io_gl
);
176 if (type
== DT_UNKNOWN
) {
177 /* Inode glock must be locked already */
178 error
= gfs2_inode_refresh(GFS2_I(inode
));
182 inode
->i_mode
= DT2IF(type
);
186 unlock_new_inode(inode
);
192 ip
->i_iopen_gh
.gh_gl
->gl_object
= NULL
;
193 gfs2_glock_dq_uninit(&ip
->i_iopen_gh
);
196 gfs2_glock_put(io_gl
);
198 ip
->i_gl
->gl_object
= NULL
;
199 gfs2_glock_put(ip
->i_gl
);
202 return ERR_PTR(error
);
205 struct inode
*gfs2_lookup_by_inum(struct gfs2_sbd
*sdp
, u64 no_addr
,
206 u64
*no_formal_ino
, unsigned int blktype
)
208 struct super_block
*sb
= sdp
->sd_vfs
;
209 struct gfs2_holder i_gh
;
210 struct inode
*inode
= NULL
;
213 /* Must not read in block until block type is verified */
214 error
= gfs2_glock_nq_num(sdp
, no_addr
, &gfs2_inode_glops
,
215 LM_ST_EXCLUSIVE
, GL_SKIP
, &i_gh
);
217 return ERR_PTR(error
);
219 error
= gfs2_check_blk_type(sdp
, no_addr
, blktype
);
223 inode
= gfs2_inode_lookup(sb
, DT_UNKNOWN
, no_addr
, 0, 1);
227 /* Two extra checks for NFS only */
230 if (GFS2_I(inode
)->i_no_formal_ino
!= *no_formal_ino
)
234 if (GFS2_I(inode
)->i_diskflags
& GFS2_DIF_SYSTEM
)
241 gfs2_glock_dq_uninit(&i_gh
);
242 return error
? ERR_PTR(error
) : inode
;
249 struct inode
*gfs2_lookup_simple(struct inode
*dip
, const char *name
)
253 gfs2_str2qstr(&qstr
, name
);
254 inode
= gfs2_lookupi(dip
, &qstr
, 1);
255 /* gfs2_lookupi has inconsistent callers: vfs
256 * related routines expect NULL for no entry found,
257 * gfs2_lookup_simple callers expect ENOENT
258 * and do not check for NULL.
261 return ERR_PTR(-ENOENT
);
268 * gfs2_lookupi - Look up a filename in a directory and return its inode
269 * @d_gh: An initialized holder for the directory glock
270 * @name: The name of the inode to look for
271 * @is_root: If 1, ignore the caller's permissions
272 * @i_gh: An uninitialized holder for the new inode glock
274 * This can be called via the VFS filldir function when NFS is doing
275 * a readdirplus and the inode which its intending to stat isn't
276 * already in cache. In this case we must not take the directory glock
277 * again, since the readdir call will have already taken that lock.
282 struct inode
*gfs2_lookupi(struct inode
*dir
, const struct qstr
*name
,
285 struct super_block
*sb
= dir
->i_sb
;
286 struct gfs2_inode
*dip
= GFS2_I(dir
);
287 struct gfs2_holder d_gh
;
289 struct inode
*inode
= NULL
;
292 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
293 return ERR_PTR(-ENAMETOOLONG
);
295 if ((name
->len
== 1 && memcmp(name
->name
, ".", 1) == 0) ||
296 (name
->len
== 2 && memcmp(name
->name
, "..", 2) == 0 &&
297 dir
== sb
->s_root
->d_inode
)) {
302 if (gfs2_glock_is_locked_by_me(dip
->i_gl
) == NULL
) {
303 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_SHARED
, 0, &d_gh
);
305 return ERR_PTR(error
);
310 error
= gfs2_permission(dir
, MAY_EXEC
);
315 inode
= gfs2_dir_search(dir
, name
);
317 error
= PTR_ERR(inode
);
320 gfs2_glock_dq_uninit(&d_gh
);
321 if (error
== -ENOENT
)
323 return inode
? inode
: ERR_PTR(error
);
327 * create_ok - OK to create a new on-disk inode here?
328 * @dip: Directory in which dinode is to be created
329 * @name: Name of new dinode
335 static int create_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
340 error
= gfs2_permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
);
344 /* Don't create entries in an unlinked directory */
345 if (!dip
->i_inode
.i_nlink
)
348 error
= gfs2_dir_check(&dip
->i_inode
, name
, NULL
);
359 if (dip
->i_entries
== (u32
)-1)
361 if (S_ISDIR(mode
) && dip
->i_inode
.i_nlink
== (u32
)-1)
367 static void munge_mode_uid_gid(struct gfs2_inode
*dip
, umode_t
*mode
,
368 unsigned int *uid
, unsigned int *gid
)
370 if (GFS2_SB(&dip
->i_inode
)->sd_args
.ar_suiddir
&&
371 (dip
->i_inode
.i_mode
& S_ISUID
) && dip
->i_inode
.i_uid
) {
374 else if (dip
->i_inode
.i_uid
!= current_fsuid())
376 *uid
= dip
->i_inode
.i_uid
;
378 *uid
= current_fsuid();
380 if (dip
->i_inode
.i_mode
& S_ISGID
) {
383 *gid
= dip
->i_inode
.i_gid
;
385 *gid
= current_fsgid();
388 static int alloc_dinode(struct gfs2_inode
*dip
, u64
*no_addr
, u64
*generation
)
390 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
394 error
= gfs2_inplace_reserve(dip
, RES_DINODE
);
398 error
= gfs2_trans_begin(sdp
, RES_RG_BIT
+ RES_STATFS
, 0);
402 error
= gfs2_alloc_blocks(dip
, no_addr
, &dblocks
, 1, generation
);
407 gfs2_inplace_release(dip
);
412 static void gfs2_init_dir(struct buffer_head
*dibh
,
413 const struct gfs2_inode
*parent
)
415 struct gfs2_dinode
*di
= (struct gfs2_dinode
*)dibh
->b_data
;
416 struct gfs2_dirent
*dent
= (struct gfs2_dirent
*)(di
+1);
418 gfs2_qstr2dirent(&gfs2_qdot
, GFS2_DIRENT_SIZE(gfs2_qdot
.len
), dent
);
419 dent
->de_inum
= di
->di_num
; /* already GFS2 endian */
420 dent
->de_type
= cpu_to_be16(DT_DIR
);
422 dent
= (struct gfs2_dirent
*)((char*)dent
+ GFS2_DIRENT_SIZE(1));
423 gfs2_qstr2dirent(&gfs2_qdotdot
, dibh
->b_size
- GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode
), dent
);
424 gfs2_inum_out(parent
, dent
);
425 dent
->de_type
= cpu_to_be16(DT_DIR
);
430 * init_dinode - Fill in a new dinode structure
431 * @dip: The directory this inode is being created in
432 * @gl: The glock covering the new inode
433 * @inum: The inode number
434 * @mode: The file permissions
435 * @uid: The uid of the new inode
436 * @gid: The gid of the new inode
437 * @generation: The generation number of the new inode
438 * @dev: The device number (if a device node)
439 * @symname: The symlink destination (if a symlink)
440 * @size: The inode size (ignored for directories)
441 * @bhp: The buffer head (returned to caller)
445 static void init_dinode(struct gfs2_inode
*dip
, struct gfs2_glock
*gl
,
446 const struct gfs2_inum_host
*inum
, umode_t mode
,
447 unsigned int uid
, unsigned int gid
,
448 const u64
*generation
, dev_t dev
, const char *symname
,
449 unsigned size
, struct buffer_head
**bhp
)
451 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
452 struct gfs2_dinode
*di
;
453 struct buffer_head
*dibh
;
454 struct timespec tv
= CURRENT_TIME
;
456 dibh
= gfs2_meta_new(gl
, inum
->no_addr
);
457 gfs2_trans_add_bh(gl
, dibh
, 1);
458 gfs2_metatype_set(dibh
, GFS2_METATYPE_DI
, GFS2_FORMAT_DI
);
459 gfs2_buffer_clear_tail(dibh
, sizeof(struct gfs2_dinode
));
460 di
= (struct gfs2_dinode
*)dibh
->b_data
;
462 di
->di_num
.no_formal_ino
= cpu_to_be64(inum
->no_formal_ino
);
463 di
->di_num
.no_addr
= cpu_to_be64(inum
->no_addr
);
464 di
->di_mode
= cpu_to_be32(mode
);
465 di
->di_uid
= cpu_to_be32(uid
);
466 di
->di_gid
= cpu_to_be32(gid
);
468 di
->di_size
= cpu_to_be64(size
);
469 di
->di_blocks
= cpu_to_be64(1);
470 di
->di_atime
= di
->di_mtime
= di
->di_ctime
= cpu_to_be64(tv
.tv_sec
);
471 di
->di_major
= cpu_to_be32(MAJOR(dev
));
472 di
->di_minor
= cpu_to_be32(MINOR(dev
));
473 di
->di_goal_meta
= di
->di_goal_data
= cpu_to_be64(inum
->no_addr
);
474 di
->di_generation
= cpu_to_be64(*generation
);
477 di
->di_payload_format
= cpu_to_be32(S_ISDIR(mode
) ? GFS2_FORMAT_DE
: 0);
483 memset(&di
->__pad4
, 0, sizeof(di
->__pad4
));
485 di
->di_atime_nsec
= cpu_to_be32(tv
.tv_nsec
);
486 di
->di_mtime_nsec
= cpu_to_be32(tv
.tv_nsec
);
487 di
->di_ctime_nsec
= cpu_to_be32(tv
.tv_nsec
);
488 memset(&di
->di_reserved
, 0, sizeof(di
->di_reserved
));
490 switch(mode
& S_IFMT
) {
492 if ((dip
->i_diskflags
& GFS2_DIF_INHERIT_JDATA
) ||
493 gfs2_tune_get(sdp
, gt_new_files_jdata
))
494 di
->di_flags
|= cpu_to_be32(GFS2_DIF_JDATA
);
497 di
->di_flags
|= cpu_to_be32(dip
->i_diskflags
&
498 GFS2_DIF_INHERIT_JDATA
);
499 di
->di_flags
|= cpu_to_be32(GFS2_DIF_JDATA
);
500 di
->di_size
= cpu_to_be64(sdp
->sd_sb
.sb_bsize
- sizeof(struct gfs2_dinode
));
501 di
->di_entries
= cpu_to_be32(2);
502 gfs2_init_dir(dibh
, dip
);
505 memcpy(dibh
->b_data
+ sizeof(struct gfs2_dinode
), symname
, size
);
509 set_buffer_uptodate(dibh
);
514 static int make_dinode(struct gfs2_inode
*dip
, struct gfs2_glock
*gl
,
515 umode_t mode
, const struct gfs2_inum_host
*inum
,
516 const u64
*generation
, dev_t dev
, const char *symname
,
517 unsigned int size
, struct buffer_head
**bhp
)
519 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
520 unsigned int uid
, gid
;
523 munge_mode_uid_gid(dip
, &mode
, &uid
, &gid
);
524 error
= gfs2_rindex_update(sdp
);
528 error
= gfs2_quota_lock(dip
, uid
, gid
);
532 error
= gfs2_quota_check(dip
, uid
, gid
);
536 error
= gfs2_trans_begin(sdp
, RES_DINODE
+ RES_QUOTA
, 0);
540 init_dinode(dip
, gl
, inum
, mode
, uid
, gid
, generation
, dev
, symname
, size
, bhp
);
541 gfs2_quota_change(dip
, +1, uid
, gid
);
545 gfs2_quota_unlock(dip
);
549 static int link_dinode(struct gfs2_inode
*dip
, const struct qstr
*name
,
550 struct gfs2_inode
*ip
)
552 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
554 struct buffer_head
*dibh
;
557 error
= gfs2_rindex_update(sdp
);
561 error
= gfs2_quota_lock(dip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
565 error
= alloc_required
= gfs2_diradd_alloc_required(&dip
->i_inode
, name
);
566 if (alloc_required
< 0)
567 goto fail_quota_locks
;
568 if (alloc_required
) {
569 error
= gfs2_quota_check(dip
, dip
->i_inode
.i_uid
, dip
->i_inode
.i_gid
);
571 goto fail_quota_locks
;
573 error
= gfs2_inplace_reserve(dip
, sdp
->sd_max_dirres
);
575 goto fail_quota_locks
;
577 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
578 dip
->i_rgd
->rd_length
+
580 RES_STATFS
+ RES_QUOTA
, 0);
584 error
= gfs2_trans_begin(sdp
, RES_LEAF
+ 2 * RES_DINODE
, 0);
586 goto fail_quota_locks
;
589 error
= gfs2_dir_add(&dip
->i_inode
, name
, ip
);
593 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
596 set_nlink(&ip
->i_inode
, S_ISDIR(ip
->i_inode
.i_mode
) ? 2 : 1);
597 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
598 gfs2_dinode_out(ip
, dibh
->b_data
);
607 gfs2_inplace_release(dip
);
610 gfs2_quota_unlock(dip
);
616 static int gfs2_initxattrs(struct inode
*inode
, const struct xattr
*xattr_array
,
619 const struct xattr
*xattr
;
622 for (xattr
= xattr_array
; xattr
->name
!= NULL
; xattr
++) {
623 err
= __gfs2_xattr_set(inode
, xattr
->name
, xattr
->value
,
625 GFS2_EATYPE_SECURITY
);
632 static int gfs2_security_init(struct gfs2_inode
*dip
, struct gfs2_inode
*ip
,
633 const struct qstr
*qstr
)
635 return security_inode_init_security(&ip
->i_inode
, &dip
->i_inode
, qstr
,
636 &gfs2_initxattrs
, NULL
);
640 * gfs2_create_inode - Create a new inode
641 * @dir: The parent directory
642 * @dentry: The new dentry
643 * @mode: The permissions on the new inode
644 * @dev: For device nodes, this is the device number
645 * @symname: For symlinks, this is the link destination
646 * @size: The initial size of the inode (ignored for directories)
648 * Returns: 0 on success, or error code
651 static int gfs2_create_inode(struct inode
*dir
, struct dentry
*dentry
,
652 umode_t mode
, dev_t dev
, const char *symname
,
653 unsigned int size
, int excl
)
655 const struct qstr
*name
= &dentry
->d_name
;
656 struct gfs2_holder ghs
[2];
657 struct inode
*inode
= NULL
;
658 struct gfs2_inode
*dip
= GFS2_I(dir
), *ip
;
659 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
660 struct gfs2_inum_host inum
= { .no_addr
= 0, .no_formal_ino
= 0 };
663 struct buffer_head
*bh
= NULL
;
665 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
666 return -ENAMETOOLONG
;
668 /* We need a reservation to allocate the new dinode block. The
669 directory ip temporarily points to the reservation, but this is
670 being done to get a set of contiguous blocks for the new dinode.
671 Since this is a create, we don't have a sizehint yet, so it will
672 have to use the minimum reservation size. */
673 error
= gfs2_rs_alloc(dip
);
677 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
681 error
= create_ok(dip
, name
, mode
);
682 if ((error
== -EEXIST
) && S_ISREG(mode
) && !excl
) {
683 inode
= gfs2_lookupi(dir
, &dentry
->d_name
, 0);
684 gfs2_glock_dq_uninit(ghs
);
685 d_instantiate(dentry
, inode
);
686 return IS_ERR(inode
) ? PTR_ERR(inode
) : 0;
691 error
= alloc_dinode(dip
, &inum
.no_addr
, &generation
);
694 inum
.no_formal_ino
= generation
;
696 error
= gfs2_glock_nq_num(sdp
, inum
.no_addr
, &gfs2_inode_glops
,
697 LM_ST_EXCLUSIVE
, GL_SKIP
, ghs
+ 1);
701 error
= make_dinode(dip
, ghs
[1].gh_gl
, mode
, &inum
, &generation
, dev
, symname
, size
, &bh
);
705 inode
= gfs2_inode_lookup(dir
->i_sb
, IF2DT(mode
), inum
.no_addr
,
706 inum
.no_formal_ino
, 0);
711 error
= gfs2_inode_refresh(ip
);
715 /* The newly created inode needs a reservation so it can allocate
716 xattrs. At the same time, we want new blocks allocated to the new
717 dinode to be as contiguous as possible. Since we allocated the
718 dinode block under the directory's reservation, we transfer
719 ownership of that reservation to the new inode. The directory
720 doesn't need a reservation unless it needs a new allocation. */
721 ip
->i_res
= dip
->i_res
;
724 error
= gfs2_acl_create(dip
, inode
);
728 error
= gfs2_security_init(dip
, ip
, name
);
732 error
= link_dinode(dip
, name
, ip
);
740 gfs2_inplace_release(dip
);
741 gfs2_quota_unlock(dip
);
742 mark_inode_dirty(inode
);
743 gfs2_glock_dq_uninit_m(2, ghs
);
744 d_instantiate(dentry
, inode
);
748 gfs2_glock_dq_uninit(ghs
+ 1);
750 gfs2_glock_dq_uninit(ghs
);
751 if (inode
&& !IS_ERR(inode
)) {
752 set_bit(GIF_ALLOC_FAILED
, &GFS2_I(inode
)->i_flags
);
763 * gfs2_create - Create a file
764 * @dir: The directory in which to create the file
765 * @dentry: The dentry of the new file
766 * @mode: The mode of the new file
771 static int gfs2_create(struct inode
*dir
, struct dentry
*dentry
,
772 umode_t mode
, bool excl
)
774 return gfs2_create_inode(dir
, dentry
, S_IFREG
| mode
, 0, NULL
, 0, excl
);
778 * gfs2_lookup - Look up a filename in a directory and return its inode
779 * @dir: The directory inode
780 * @dentry: The dentry of the new inode
781 * @nd: passed from Linux VFS, ignored by us
783 * Called by the VFS layer. Lock dir and call gfs2_lookupi()
788 static struct dentry
*gfs2_lookup(struct inode
*dir
, struct dentry
*dentry
,
791 struct inode
*inode
= gfs2_lookupi(dir
, &dentry
->d_name
, 0);
792 if (inode
&& !IS_ERR(inode
)) {
793 struct gfs2_glock
*gl
= GFS2_I(inode
)->i_gl
;
794 struct gfs2_holder gh
;
796 error
= gfs2_glock_nq_init(gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
799 return ERR_PTR(error
);
801 gfs2_glock_dq_uninit(&gh
);
803 return d_splice_alias(inode
, dentry
);
807 * gfs2_link - Link to a file
808 * @old_dentry: The inode to link
809 * @dir: Add link to this directory
810 * @dentry: The name of the link
812 * Link the inode in "old_dentry" into the directory "dir" with the
818 static int gfs2_link(struct dentry
*old_dentry
, struct inode
*dir
,
819 struct dentry
*dentry
)
821 struct gfs2_inode
*dip
= GFS2_I(dir
);
822 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
823 struct inode
*inode
= old_dentry
->d_inode
;
824 struct gfs2_inode
*ip
= GFS2_I(inode
);
825 struct gfs2_holder ghs
[2];
826 struct buffer_head
*dibh
;
830 if (S_ISDIR(inode
->i_mode
))
833 error
= gfs2_rs_alloc(dip
);
837 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
838 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
840 error
= gfs2_glock_nq(ghs
); /* parent */
844 error
= gfs2_glock_nq(ghs
+ 1); /* child */
849 if (inode
->i_nlink
== 0)
852 error
= gfs2_permission(dir
, MAY_WRITE
| MAY_EXEC
);
856 error
= gfs2_dir_check(dir
, &dentry
->d_name
, NULL
);
867 if (!dip
->i_inode
.i_nlink
)
870 if (dip
->i_entries
== (u32
)-1)
873 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
876 if (!ip
->i_inode
.i_nlink
)
879 if (ip
->i_inode
.i_nlink
== (u32
)-1)
882 alloc_required
= error
= gfs2_diradd_alloc_required(dir
, &dentry
->d_name
);
887 if (alloc_required
) {
888 error
= gfs2_quota_lock_check(dip
);
892 error
= gfs2_inplace_reserve(dip
, sdp
->sd_max_dirres
);
896 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
897 gfs2_rg_blocks(dip
, sdp
->sd_max_dirres
) +
898 2 * RES_DINODE
+ RES_STATFS
+
903 error
= gfs2_trans_begin(sdp
, 2 * RES_DINODE
+ RES_LEAF
, 0);
908 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
912 error
= gfs2_dir_add(dir
, &dentry
->d_name
, ip
);
916 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
917 inc_nlink(&ip
->i_inode
);
918 ip
->i_inode
.i_ctime
= CURRENT_TIME
;
920 d_instantiate(dentry
, inode
);
921 mark_inode_dirty(inode
);
929 gfs2_inplace_release(dip
);
932 gfs2_quota_unlock(dip
);
934 gfs2_glock_dq(ghs
+ 1);
938 gfs2_holder_uninit(ghs
);
939 gfs2_holder_uninit(ghs
+ 1);
944 * gfs2_unlink_ok - check to see that a inode is still in a directory
945 * @dip: the directory
946 * @name: the name of the file
949 * Assumes that the lock on (at least) @dip is held.
951 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
954 static int gfs2_unlink_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
955 const struct gfs2_inode
*ip
)
959 if (IS_IMMUTABLE(&ip
->i_inode
) || IS_APPEND(&ip
->i_inode
))
962 if ((dip
->i_inode
.i_mode
& S_ISVTX
) &&
963 dip
->i_inode
.i_uid
!= current_fsuid() &&
964 ip
->i_inode
.i_uid
!= current_fsuid() && !capable(CAP_FOWNER
))
967 if (IS_APPEND(&dip
->i_inode
))
970 error
= gfs2_permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
);
974 error
= gfs2_dir_check(&dip
->i_inode
, name
, ip
);
982 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
983 * @dip: The parent directory
984 * @name: The name of the entry in the parent directory
985 * @bh: The inode buffer for the inode to be removed
986 * @inode: The inode to be removed
988 * Called with all the locks and in a transaction. This will only be
989 * called for a directory after it has been checked to ensure it is empty.
991 * Returns: 0 on success, or an error
994 static int gfs2_unlink_inode(struct gfs2_inode
*dip
,
995 const struct dentry
*dentry
,
996 struct buffer_head
*bh
)
998 struct inode
*inode
= dentry
->d_inode
;
999 struct gfs2_inode
*ip
= GFS2_I(inode
);
1002 error
= gfs2_dir_del(dip
, dentry
);
1007 inode
->i_ctime
= CURRENT_TIME
;
1008 if (S_ISDIR(inode
->i_mode
))
1012 mark_inode_dirty(inode
);
1013 if (inode
->i_nlink
== 0)
1014 gfs2_unlink_di(inode
);
1020 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1021 * @dir: The inode of the directory containing the inode to unlink
1022 * @dentry: The file itself
1024 * This routine uses the type of the inode as a flag to figure out
1025 * whether this is an unlink or an rmdir.
1030 static int gfs2_unlink(struct inode
*dir
, struct dentry
*dentry
)
1032 struct gfs2_inode
*dip
= GFS2_I(dir
);
1033 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
1034 struct inode
*inode
= dentry
->d_inode
;
1035 struct gfs2_inode
*ip
= GFS2_I(inode
);
1036 struct buffer_head
*bh
;
1037 struct gfs2_holder ghs
[3];
1038 struct gfs2_rgrpd
*rgd
;
1041 error
= gfs2_rindex_update(sdp
);
1047 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
1048 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
1050 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_no_addr
, 1);
1054 gfs2_holder_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 2);
1057 error
= gfs2_glock_nq(ghs
); /* parent */
1061 error
= gfs2_glock_nq(ghs
+ 1); /* child */
1066 if (inode
->i_nlink
== 0)
1069 if (S_ISDIR(inode
->i_mode
)) {
1071 if (ip
->i_entries
> 2 || inode
->i_nlink
> 2)
1075 error
= gfs2_glock_nq(ghs
+ 2); /* rgrp */
1079 error
= gfs2_unlink_ok(dip
, &dentry
->d_name
, ip
);
1083 error
= gfs2_trans_begin(sdp
, 2*RES_DINODE
+ 3*RES_LEAF
+ RES_RG_BIT
, 0);
1087 error
= gfs2_meta_inode_buffer(ip
, &bh
);
1091 error
= gfs2_unlink_inode(dip
, dentry
, bh
);
1095 gfs2_trans_end(sdp
);
1097 gfs2_glock_dq(ghs
+ 2);
1099 gfs2_glock_dq(ghs
+ 1);
1103 gfs2_holder_uninit(ghs
+ 2);
1105 gfs2_holder_uninit(ghs
+ 1);
1106 gfs2_holder_uninit(ghs
);
1111 * gfs2_symlink - Create a symlink
1112 * @dir: The directory to create the symlink in
1113 * @dentry: The dentry to put the symlink in
1114 * @symname: The thing which the link points to
1119 static int gfs2_symlink(struct inode
*dir
, struct dentry
*dentry
,
1120 const char *symname
)
1122 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
1125 size
= strlen(symname
);
1126 if (size
> sdp
->sd_sb
.sb_bsize
- sizeof(struct gfs2_dinode
) - 1)
1127 return -ENAMETOOLONG
;
1129 return gfs2_create_inode(dir
, dentry
, S_IFLNK
| S_IRWXUGO
, 0, symname
, size
, 0);
1133 * gfs2_mkdir - Make a directory
1134 * @dir: The parent directory of the new one
1135 * @dentry: The dentry of the new directory
1136 * @mode: The mode of the new directory
1141 static int gfs2_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1143 return gfs2_create_inode(dir
, dentry
, S_IFDIR
| mode
, 0, NULL
, 0, 0);
1147 * gfs2_mknod - Make a special file
1148 * @dir: The directory in which the special file will reside
1149 * @dentry: The dentry of the special file
1150 * @mode: The mode of the special file
1151 * @dev: The device specification of the special file
1155 static int gfs2_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
1158 return gfs2_create_inode(dir
, dentry
, mode
, dev
, NULL
, 0, 0);
1162 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1166 * Follow @to back to the root and make sure we don't encounter @this
1167 * Assumes we already hold the rename lock.
1172 static int gfs2_ok_to_move(struct gfs2_inode
*this, struct gfs2_inode
*to
)
1174 struct inode
*dir
= &to
->i_inode
;
1175 struct super_block
*sb
= dir
->i_sb
;
1182 if (dir
== &this->i_inode
) {
1186 if (dir
== sb
->s_root
->d_inode
) {
1191 tmp
= gfs2_lookupi(dir
, &gfs2_qdotdot
, 1);
1193 error
= PTR_ERR(tmp
);
1207 * gfs2_rename - Rename a file
1208 * @odir: Parent directory of old file name
1209 * @odentry: The old dentry of the file
1210 * @ndir: Parent directory of new file name
1211 * @ndentry: The new dentry of the file
1216 static int gfs2_rename(struct inode
*odir
, struct dentry
*odentry
,
1217 struct inode
*ndir
, struct dentry
*ndentry
)
1219 struct gfs2_inode
*odip
= GFS2_I(odir
);
1220 struct gfs2_inode
*ndip
= GFS2_I(ndir
);
1221 struct gfs2_inode
*ip
= GFS2_I(odentry
->d_inode
);
1222 struct gfs2_inode
*nip
= NULL
;
1223 struct gfs2_sbd
*sdp
= GFS2_SB(odir
);
1224 struct gfs2_holder ghs
[5], r_gh
= { .gh_gl
= NULL
, };
1225 struct gfs2_rgrpd
*nrgd
;
1226 unsigned int num_gh
;
1228 int alloc_required
= 0;
1232 if (ndentry
->d_inode
) {
1233 nip
= GFS2_I(ndentry
->d_inode
);
1238 error
= gfs2_rindex_update(sdp
);
1242 error
= gfs2_rs_alloc(ndip
);
1247 error
= gfs2_glock_nq_init(sdp
->sd_rename_gl
, LM_ST_EXCLUSIVE
,
1252 if (S_ISDIR(ip
->i_inode
.i_mode
)) {
1254 /* don't move a dirctory into it's subdir */
1255 error
= gfs2_ok_to_move(ip
, ndip
);
1262 gfs2_holder_init(odip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
1264 gfs2_holder_init(ndip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
1267 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
1271 gfs2_holder_init(nip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
1273 /* grab the resource lock for unlink flag twiddling
1274 * this is the case of the target file already existing
1275 * so we unlink before doing the rename
1277 nrgd
= gfs2_blk2rgrpd(sdp
, nip
->i_no_addr
, 1);
1279 gfs2_holder_init(nrgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
++);
1282 for (x
= 0; x
< num_gh
; x
++) {
1283 error
= gfs2_glock_nq(ghs
+ x
);
1289 if (ip
->i_inode
.i_nlink
== 0)
1292 /* Check out the old directory */
1294 error
= gfs2_unlink_ok(odip
, &odentry
->d_name
, ip
);
1298 /* Check out the new directory */
1301 error
= gfs2_unlink_ok(ndip
, &ndentry
->d_name
, nip
);
1305 if (nip
->i_inode
.i_nlink
== 0) {
1310 if (S_ISDIR(nip
->i_inode
.i_mode
)) {
1311 if (nip
->i_entries
< 2) {
1312 gfs2_consist_inode(nip
);
1316 if (nip
->i_entries
> 2) {
1322 error
= gfs2_permission(ndir
, MAY_WRITE
| MAY_EXEC
);
1326 error
= gfs2_dir_check(ndir
, &ndentry
->d_name
, NULL
);
1338 if (!ndip
->i_inode
.i_nlink
) {
1342 if (ndip
->i_entries
== (u32
)-1) {
1346 if (S_ISDIR(ip
->i_inode
.i_mode
) &&
1347 ndip
->i_inode
.i_nlink
== (u32
)-1) {
1354 /* Check out the dir to be renamed */
1357 error
= gfs2_permission(odentry
->d_inode
, MAY_WRITE
);
1363 alloc_required
= gfs2_diradd_alloc_required(ndir
, &ndentry
->d_name
);
1364 error
= alloc_required
;
1368 if (alloc_required
) {
1369 error
= gfs2_quota_lock_check(ndip
);
1373 error
= gfs2_inplace_reserve(ndip
, sdp
->sd_max_dirres
);
1377 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
1378 gfs2_rg_blocks(ndip
, sdp
->sd_max_dirres
) +
1379 4 * RES_DINODE
+ 4 * RES_LEAF
+
1380 RES_STATFS
+ RES_QUOTA
+ 4, 0);
1384 error
= gfs2_trans_begin(sdp
, 4 * RES_DINODE
+
1385 5 * RES_LEAF
+ 4, 0);
1390 /* Remove the target file, if it exists */
1393 struct buffer_head
*bh
;
1394 error
= gfs2_meta_inode_buffer(nip
, &bh
);
1397 error
= gfs2_unlink_inode(ndip
, ndentry
, bh
);
1402 error
= gfs2_dir_mvino(ip
, &gfs2_qdotdot
, ndip
, DT_DIR
);
1406 struct buffer_head
*dibh
;
1407 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1410 ip
->i_inode
.i_ctime
= CURRENT_TIME
;
1411 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1412 gfs2_dinode_out(ip
, dibh
->b_data
);
1416 error
= gfs2_dir_del(odip
, odentry
);
1420 error
= gfs2_dir_add(ndir
, &ndentry
->d_name
, ip
);
1425 gfs2_trans_end(sdp
);
1428 gfs2_inplace_release(ndip
);
1431 gfs2_quota_unlock(ndip
);
1434 gfs2_glock_dq(ghs
+ x
);
1435 gfs2_holder_uninit(ghs
+ x
);
1439 gfs2_glock_dq_uninit(&r_gh
);
1445 * gfs2_follow_link - Follow a symbolic link
1446 * @dentry: The dentry of the link
1447 * @nd: Data that we pass to vfs_follow_link()
1449 * This can handle symlinks of any size.
1451 * Returns: 0 on success or error code
1454 static void *gfs2_follow_link(struct dentry
*dentry
, struct nameidata
*nd
)
1456 struct gfs2_inode
*ip
= GFS2_I(dentry
->d_inode
);
1457 struct gfs2_holder i_gh
;
1458 struct buffer_head
*dibh
;
1463 gfs2_holder_init(ip
->i_gl
, LM_ST_SHARED
, 0, &i_gh
);
1464 error
= gfs2_glock_nq(&i_gh
);
1466 gfs2_holder_uninit(&i_gh
);
1467 nd_set_link(nd
, ERR_PTR(error
));
1471 size
= (unsigned int)i_size_read(&ip
->i_inode
);
1473 gfs2_consist_inode(ip
);
1474 buf
= ERR_PTR(-EIO
);
1478 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1480 buf
= ERR_PTR(error
);
1484 buf
= kzalloc(size
+ 1, GFP_NOFS
);
1486 buf
= ERR_PTR(-ENOMEM
);
1488 memcpy(buf
, dibh
->b_data
+ sizeof(struct gfs2_dinode
), size
);
1491 gfs2_glock_dq_uninit(&i_gh
);
1492 nd_set_link(nd
, buf
);
1496 static void gfs2_put_link(struct dentry
*dentry
, struct nameidata
*nd
, void *p
)
1498 char *s
= nd_get_link(nd
);
1506 * @mask: The mask to be tested
1507 * @flags: Indicates whether this is an RCU path walk or not
1509 * This may be called from the VFS directly, or from within GFS2 with the
1510 * inode locked, so we look to see if the glock is already locked and only
1511 * lock the glock if its not already been done.
1516 int gfs2_permission(struct inode
*inode
, int mask
)
1518 struct gfs2_inode
*ip
;
1519 struct gfs2_holder i_gh
;
1525 if (gfs2_glock_is_locked_by_me(ip
->i_gl
) == NULL
) {
1526 if (mask
& MAY_NOT_BLOCK
)
1528 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &i_gh
);
1534 if ((mask
& MAY_WRITE
) && IS_IMMUTABLE(inode
))
1537 error
= generic_permission(inode
, mask
);
1539 gfs2_glock_dq_uninit(&i_gh
);
1544 static int __gfs2_setattr_simple(struct inode
*inode
, struct iattr
*attr
)
1546 setattr_copy(inode
, attr
);
1547 mark_inode_dirty(inode
);
1552 * gfs2_setattr_simple -
1559 int gfs2_setattr_simple(struct inode
*inode
, struct iattr
*attr
)
1563 if (current
->journal_info
)
1564 return __gfs2_setattr_simple(inode
, attr
);
1566 error
= gfs2_trans_begin(GFS2_SB(inode
), RES_DINODE
, 0);
1570 error
= __gfs2_setattr_simple(inode
, attr
);
1571 gfs2_trans_end(GFS2_SB(inode
));
1575 static int setattr_chown(struct inode
*inode
, struct iattr
*attr
)
1577 struct gfs2_inode
*ip
= GFS2_I(inode
);
1578 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
1579 u32 ouid
, ogid
, nuid
, ngid
;
1582 ouid
= inode
->i_uid
;
1583 ogid
= inode
->i_gid
;
1584 nuid
= attr
->ia_uid
;
1585 ngid
= attr
->ia_gid
;
1587 if (!(attr
->ia_valid
& ATTR_UID
) || ouid
== nuid
)
1588 ouid
= nuid
= NO_QUOTA_CHANGE
;
1589 if (!(attr
->ia_valid
& ATTR_GID
) || ogid
== ngid
)
1590 ogid
= ngid
= NO_QUOTA_CHANGE
;
1592 error
= gfs2_quota_lock(ip
, nuid
, ngid
);
1596 if (ouid
!= NO_QUOTA_CHANGE
|| ogid
!= NO_QUOTA_CHANGE
) {
1597 error
= gfs2_quota_check(ip
, nuid
, ngid
);
1602 error
= gfs2_trans_begin(sdp
, RES_DINODE
+ 2 * RES_QUOTA
, 0);
1606 error
= gfs2_setattr_simple(inode
, attr
);
1610 if (ouid
!= NO_QUOTA_CHANGE
|| ogid
!= NO_QUOTA_CHANGE
) {
1611 u64 blocks
= gfs2_get_inode_blocks(&ip
->i_inode
);
1612 gfs2_quota_change(ip
, -blocks
, ouid
, ogid
);
1613 gfs2_quota_change(ip
, blocks
, nuid
, ngid
);
1617 gfs2_trans_end(sdp
);
1619 gfs2_quota_unlock(ip
);
1624 * gfs2_setattr - Change attributes on an inode
1625 * @dentry: The dentry which is changing
1626 * @attr: The structure describing the change
1628 * The VFS layer wants to change one or more of an inodes attributes. Write
1629 * that change out to disk.
1634 static int gfs2_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1636 struct inode
*inode
= dentry
->d_inode
;
1637 struct gfs2_inode
*ip
= GFS2_I(inode
);
1638 struct gfs2_holder i_gh
;
1641 error
= gfs2_rs_alloc(ip
);
1645 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1650 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
1653 error
= inode_change_ok(inode
, attr
);
1657 if (attr
->ia_valid
& ATTR_SIZE
)
1658 error
= gfs2_setattr_size(inode
, attr
->ia_size
);
1659 else if (attr
->ia_valid
& (ATTR_UID
| ATTR_GID
))
1660 error
= setattr_chown(inode
, attr
);
1661 else if ((attr
->ia_valid
& ATTR_MODE
) && IS_POSIXACL(inode
))
1662 error
= gfs2_acl_chmod(ip
, attr
);
1664 error
= gfs2_setattr_simple(inode
, attr
);
1668 mark_inode_dirty(inode
);
1669 gfs2_glock_dq_uninit(&i_gh
);
1674 * gfs2_getattr - Read out an inode's attributes
1675 * @mnt: The vfsmount the inode is being accessed from
1676 * @dentry: The dentry to stat
1677 * @stat: The inode's stats
1679 * This may be called from the VFS directly, or from within GFS2 with the
1680 * inode locked, so we look to see if the glock is already locked and only
1681 * lock the glock if its not already been done. Note that its the NFS
1682 * readdirplus operation which causes this to be called (from filldir)
1683 * with the glock already held.
1688 static int gfs2_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
1691 struct inode
*inode
= dentry
->d_inode
;
1692 struct gfs2_inode
*ip
= GFS2_I(inode
);
1693 struct gfs2_holder gh
;
1697 if (gfs2_glock_is_locked_by_me(ip
->i_gl
) == NULL
) {
1698 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
1704 generic_fillattr(inode
, stat
);
1706 gfs2_glock_dq_uninit(&gh
);
1711 static int gfs2_setxattr(struct dentry
*dentry
, const char *name
,
1712 const void *data
, size_t size
, int flags
)
1714 struct inode
*inode
= dentry
->d_inode
;
1715 struct gfs2_inode
*ip
= GFS2_I(inode
);
1716 struct gfs2_holder gh
;
1719 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &gh
);
1720 ret
= gfs2_glock_nq(&gh
);
1722 ret
= gfs2_rs_alloc(ip
);
1724 ret
= generic_setxattr(dentry
, name
, data
, size
, flags
);
1727 gfs2_holder_uninit(&gh
);
1731 static ssize_t
gfs2_getxattr(struct dentry
*dentry
, const char *name
,
1732 void *data
, size_t size
)
1734 struct inode
*inode
= dentry
->d_inode
;
1735 struct gfs2_inode
*ip
= GFS2_I(inode
);
1736 struct gfs2_holder gh
;
1739 gfs2_holder_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
1740 ret
= gfs2_glock_nq(&gh
);
1742 ret
= generic_getxattr(dentry
, name
, data
, size
);
1745 gfs2_holder_uninit(&gh
);
1749 static int gfs2_removexattr(struct dentry
*dentry
, const char *name
)
1751 struct inode
*inode
= dentry
->d_inode
;
1752 struct gfs2_inode
*ip
= GFS2_I(inode
);
1753 struct gfs2_holder gh
;
1756 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &gh
);
1757 ret
= gfs2_glock_nq(&gh
);
1759 ret
= gfs2_rs_alloc(ip
);
1761 ret
= generic_removexattr(dentry
, name
);
1764 gfs2_holder_uninit(&gh
);
1768 static int gfs2_fiemap(struct inode
*inode
, struct fiemap_extent_info
*fieinfo
,
1771 struct gfs2_inode
*ip
= GFS2_I(inode
);
1772 struct gfs2_holder gh
;
1775 ret
= fiemap_check_flags(fieinfo
, FIEMAP_FLAG_SYNC
);
1779 mutex_lock(&inode
->i_mutex
);
1781 ret
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &gh
);
1785 if (gfs2_is_stuffed(ip
)) {
1786 u64 phys
= ip
->i_no_addr
<< inode
->i_blkbits
;
1787 u64 size
= i_size_read(inode
);
1788 u32 flags
= FIEMAP_EXTENT_LAST
|FIEMAP_EXTENT_NOT_ALIGNED
|
1789 FIEMAP_EXTENT_DATA_INLINE
;
1790 phys
+= sizeof(struct gfs2_dinode
);
1792 if (start
+ len
> size
)
1795 ret
= fiemap_fill_next_extent(fieinfo
, start
, phys
,
1800 ret
= __generic_block_fiemap(inode
, fieinfo
, start
, len
,
1804 gfs2_glock_dq_uninit(&gh
);
1806 mutex_unlock(&inode
->i_mutex
);
1810 const struct inode_operations gfs2_file_iops
= {
1811 .permission
= gfs2_permission
,
1812 .setattr
= gfs2_setattr
,
1813 .getattr
= gfs2_getattr
,
1814 .setxattr
= gfs2_setxattr
,
1815 .getxattr
= gfs2_getxattr
,
1816 .listxattr
= gfs2_listxattr
,
1817 .removexattr
= gfs2_removexattr
,
1818 .fiemap
= gfs2_fiemap
,
1819 .get_acl
= gfs2_get_acl
,
1822 const struct inode_operations gfs2_dir_iops
= {
1823 .create
= gfs2_create
,
1824 .lookup
= gfs2_lookup
,
1826 .unlink
= gfs2_unlink
,
1827 .symlink
= gfs2_symlink
,
1828 .mkdir
= gfs2_mkdir
,
1829 .rmdir
= gfs2_unlink
,
1830 .mknod
= gfs2_mknod
,
1831 .rename
= gfs2_rename
,
1832 .permission
= gfs2_permission
,
1833 .setattr
= gfs2_setattr
,
1834 .getattr
= gfs2_getattr
,
1835 .setxattr
= gfs2_setxattr
,
1836 .getxattr
= gfs2_getxattr
,
1837 .listxattr
= gfs2_listxattr
,
1838 .removexattr
= gfs2_removexattr
,
1839 .fiemap
= gfs2_fiemap
,
1840 .get_acl
= gfs2_get_acl
,
1843 const struct inode_operations gfs2_symlink_iops
= {
1844 .readlink
= generic_readlink
,
1845 .follow_link
= gfs2_follow_link
,
1846 .put_link
= gfs2_put_link
,
1847 .permission
= gfs2_permission
,
1848 .setattr
= gfs2_setattr
,
1849 .getattr
= gfs2_getattr
,
1850 .setxattr
= gfs2_setxattr
,
1851 .getxattr
= gfs2_getxattr
,
1852 .listxattr
= gfs2_listxattr
,
1853 .removexattr
= gfs2_removexattr
,
1854 .fiemap
= gfs2_fiemap
,
1855 .get_acl
= gfs2_get_acl
,