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_flags
|= GL_NOCACHE
;
193 ip
->i_iopen_gh
.gh_gl
->gl_object
= NULL
;
194 gfs2_glock_dq_uninit(&ip
->i_iopen_gh
);
197 gfs2_glock_put(io_gl
);
199 ip
->i_gl
->gl_object
= NULL
;
200 gfs2_glock_put(ip
->i_gl
);
203 return ERR_PTR(error
);
206 struct inode
*gfs2_lookup_by_inum(struct gfs2_sbd
*sdp
, u64 no_addr
,
207 u64
*no_formal_ino
, unsigned int blktype
)
209 struct super_block
*sb
= sdp
->sd_vfs
;
210 struct gfs2_holder i_gh
;
211 struct inode
*inode
= NULL
;
214 /* Must not read in block until block type is verified */
215 error
= gfs2_glock_nq_num(sdp
, no_addr
, &gfs2_inode_glops
,
216 LM_ST_EXCLUSIVE
, GL_SKIP
, &i_gh
);
218 return ERR_PTR(error
);
220 error
= gfs2_check_blk_type(sdp
, no_addr
, blktype
);
224 inode
= gfs2_inode_lookup(sb
, DT_UNKNOWN
, no_addr
, 0, 1);
228 /* Two extra checks for NFS only */
231 if (GFS2_I(inode
)->i_no_formal_ino
!= *no_formal_ino
)
235 if (GFS2_I(inode
)->i_diskflags
& GFS2_DIF_SYSTEM
)
242 gfs2_glock_dq_uninit(&i_gh
);
243 return error
? ERR_PTR(error
) : inode
;
250 struct inode
*gfs2_lookup_simple(struct inode
*dip
, const char *name
)
254 gfs2_str2qstr(&qstr
, name
);
255 inode
= gfs2_lookupi(dip
, &qstr
, 1);
256 /* gfs2_lookupi has inconsistent callers: vfs
257 * related routines expect NULL for no entry found,
258 * gfs2_lookup_simple callers expect ENOENT
259 * and do not check for NULL.
262 return ERR_PTR(-ENOENT
);
269 * gfs2_lookupi - Look up a filename in a directory and return its inode
270 * @d_gh: An initialized holder for the directory glock
271 * @name: The name of the inode to look for
272 * @is_root: If 1, ignore the caller's permissions
273 * @i_gh: An uninitialized holder for the new inode glock
275 * This can be called via the VFS filldir function when NFS is doing
276 * a readdirplus and the inode which its intending to stat isn't
277 * already in cache. In this case we must not take the directory glock
278 * again, since the readdir call will have already taken that lock.
283 struct inode
*gfs2_lookupi(struct inode
*dir
, const struct qstr
*name
,
286 struct super_block
*sb
= dir
->i_sb
;
287 struct gfs2_inode
*dip
= GFS2_I(dir
);
288 struct gfs2_holder d_gh
;
290 struct inode
*inode
= NULL
;
293 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
294 return ERR_PTR(-ENAMETOOLONG
);
296 if ((name
->len
== 1 && memcmp(name
->name
, ".", 1) == 0) ||
297 (name
->len
== 2 && memcmp(name
->name
, "..", 2) == 0 &&
298 dir
== sb
->s_root
->d_inode
)) {
303 if (gfs2_glock_is_locked_by_me(dip
->i_gl
) == NULL
) {
304 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_SHARED
, 0, &d_gh
);
306 return ERR_PTR(error
);
311 error
= gfs2_permission(dir
, MAY_EXEC
);
316 inode
= gfs2_dir_search(dir
, name
, false);
318 error
= PTR_ERR(inode
);
321 gfs2_glock_dq_uninit(&d_gh
);
322 if (error
== -ENOENT
)
324 return inode
? inode
: ERR_PTR(error
);
328 * create_ok - OK to create a new on-disk inode here?
329 * @dip: Directory in which dinode is to be created
330 * @name: Name of new dinode
336 static int create_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
341 error
= gfs2_permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
);
345 /* Don't create entries in an unlinked directory */
346 if (!dip
->i_inode
.i_nlink
)
349 if (dip
->i_entries
== (u32
)-1)
351 if (S_ISDIR(mode
) && dip
->i_inode
.i_nlink
== (u32
)-1)
357 static void munge_mode_uid_gid(const struct gfs2_inode
*dip
,
360 if (GFS2_SB(&dip
->i_inode
)->sd_args
.ar_suiddir
&&
361 (dip
->i_inode
.i_mode
& S_ISUID
) &&
362 !uid_eq(dip
->i_inode
.i_uid
, GLOBAL_ROOT_UID
)) {
363 if (S_ISDIR(inode
->i_mode
))
364 inode
->i_mode
|= S_ISUID
;
365 else if (!uid_eq(dip
->i_inode
.i_uid
, current_fsuid()))
366 inode
->i_mode
&= ~07111;
367 inode
->i_uid
= dip
->i_inode
.i_uid
;
369 inode
->i_uid
= current_fsuid();
371 if (dip
->i_inode
.i_mode
& S_ISGID
) {
372 if (S_ISDIR(inode
->i_mode
))
373 inode
->i_mode
|= S_ISGID
;
374 inode
->i_gid
= dip
->i_inode
.i_gid
;
376 inode
->i_gid
= current_fsgid();
379 static int alloc_dinode(struct gfs2_inode
*ip
, u32 flags
)
381 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
385 error
= gfs2_quota_lock_check(ip
);
389 error
= gfs2_inplace_reserve(ip
, RES_DINODE
, flags
);
393 error
= gfs2_trans_begin(sdp
, RES_RG_BIT
+ RES_STATFS
+ RES_QUOTA
, 0);
397 error
= gfs2_alloc_blocks(ip
, &ip
->i_no_addr
, &dblocks
, 1, &ip
->i_generation
);
398 ip
->i_no_formal_ino
= ip
->i_generation
;
399 ip
->i_inode
.i_ino
= ip
->i_no_addr
;
400 ip
->i_goal
= ip
->i_no_addr
;
405 gfs2_inplace_release(ip
);
407 gfs2_quota_unlock(ip
);
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
433 * @symname: The symlink destination (if a symlink)
434 * @bhp: The buffer head (returned to caller)
438 static void init_dinode(struct gfs2_inode
*dip
, struct gfs2_inode
*ip
,
441 struct gfs2_dinode
*di
;
442 struct buffer_head
*dibh
;
444 dibh
= gfs2_meta_new(ip
->i_gl
, ip
->i_no_addr
);
445 gfs2_trans_add_meta(ip
->i_gl
, dibh
);
446 di
= (struct gfs2_dinode
*)dibh
->b_data
;
447 gfs2_dinode_out(ip
, di
);
449 di
->di_major
= cpu_to_be32(MAJOR(ip
->i_inode
.i_rdev
));
450 di
->di_minor
= cpu_to_be32(MINOR(ip
->i_inode
.i_rdev
));
454 memset(&di
->__pad4
, 0, sizeof(di
->__pad4
));
455 memset(&di
->di_reserved
, 0, sizeof(di
->di_reserved
));
456 gfs2_buffer_clear_tail(dibh
, sizeof(struct gfs2_dinode
));
458 switch(ip
->i_inode
.i_mode
& S_IFMT
) {
460 gfs2_init_dir(dibh
, dip
);
463 memcpy(dibh
->b_data
+ sizeof(struct gfs2_dinode
), symname
, ip
->i_inode
.i_size
);
467 set_buffer_uptodate(dibh
);
471 static int link_dinode(struct gfs2_inode
*dip
, const struct qstr
*name
,
472 struct gfs2_inode
*ip
, int arq
)
474 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
478 error
= gfs2_quota_lock_check(dip
);
480 goto fail_quota_locks
;
482 error
= gfs2_inplace_reserve(dip
, sdp
->sd_max_dirres
, 0);
484 goto fail_quota_locks
;
486 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
487 dip
->i_rgd
->rd_length
+
489 RES_STATFS
+ RES_QUOTA
, 0);
493 error
= gfs2_trans_begin(sdp
, RES_LEAF
+ 2 * RES_DINODE
, 0);
495 goto fail_quota_locks
;
498 error
= gfs2_dir_add(&dip
->i_inode
, name
, ip
);
505 gfs2_inplace_release(dip
);
507 gfs2_quota_unlock(dip
);
511 static int gfs2_initxattrs(struct inode
*inode
, const struct xattr
*xattr_array
,
514 const struct xattr
*xattr
;
517 for (xattr
= xattr_array
; xattr
->name
!= NULL
; xattr
++) {
518 err
= __gfs2_xattr_set(inode
, xattr
->name
, xattr
->value
,
520 GFS2_EATYPE_SECURITY
);
527 static int gfs2_security_init(struct gfs2_inode
*dip
, struct gfs2_inode
*ip
,
528 const struct qstr
*qstr
)
530 return security_inode_init_security(&ip
->i_inode
, &dip
->i_inode
, qstr
,
531 &gfs2_initxattrs
, NULL
);
535 * gfs2_create_inode - Create a new inode
536 * @dir: The parent directory
537 * @dentry: The new dentry
538 * @file: If non-NULL, the file which is being opened
539 * @mode: The permissions on the new inode
540 * @dev: For device nodes, this is the device number
541 * @symname: For symlinks, this is the link destination
542 * @size: The initial size of the inode (ignored for directories)
544 * Returns: 0 on success, or error code
547 static int gfs2_create_inode(struct inode
*dir
, struct dentry
*dentry
,
549 umode_t mode
, dev_t dev
, const char *symname
,
550 unsigned int size
, int excl
, int *opened
)
552 const struct qstr
*name
= &dentry
->d_name
;
553 struct gfs2_holder ghs
[2];
554 struct inode
*inode
= NULL
;
555 struct gfs2_inode
*dip
= GFS2_I(dir
), *ip
;
556 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
557 struct gfs2_glock
*io_gl
;
563 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
564 return -ENAMETOOLONG
;
566 error
= gfs2_rs_alloc(dip
);
570 error
= gfs2_rindex_update(sdp
);
574 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
578 error
= create_ok(dip
, name
, mode
);
582 inode
= gfs2_dir_search(dir
, &dentry
->d_name
, !S_ISREG(mode
) || excl
);
583 error
= PTR_ERR(inode
);
584 if (!IS_ERR(inode
)) {
585 d
= d_splice_alias(inode
, dentry
);
587 if (file
&& !IS_ERR(d
)) {
590 if (S_ISREG(inode
->i_mode
))
591 error
= finish_open(file
, d
, gfs2_open_common
, opened
);
593 error
= finish_no_open(file
, d
);
595 gfs2_glock_dq_uninit(ghs
);
599 } else if (error
!= -ENOENT
) {
603 arq
= error
= gfs2_diradd_alloc_required(dir
, name
);
607 inode
= new_inode(sdp
->sd_vfs
);
613 error
= gfs2_rs_alloc(ip
);
615 goto fail_free_inode
;
617 inode
->i_mode
= mode
;
618 set_nlink(inode
, S_ISDIR(mode
) ? 2 : 1);
620 inode
->i_size
= size
;
621 inode
->i_atime
= inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
622 gfs2_set_inode_blocks(inode
, 1);
623 munge_mode_uid_gid(dip
, inode
);
624 ip
->i_goal
= dip
->i_goal
;
631 switch(mode
& S_IFMT
) {
633 if ((dip
->i_diskflags
& GFS2_DIF_INHERIT_JDATA
) ||
634 gfs2_tune_get(sdp
, gt_new_files_jdata
))
635 ip
->i_diskflags
|= GFS2_DIF_JDATA
;
636 gfs2_set_aops(inode
);
639 ip
->i_diskflags
|= (dip
->i_diskflags
& GFS2_DIF_INHERIT_JDATA
);
640 ip
->i_diskflags
|= GFS2_DIF_JDATA
;
644 gfs2_set_inode_flags(inode
);
646 if ((GFS2_I(sdp
->sd_root_dir
->d_inode
) == dip
) ||
647 (dip
->i_diskflags
& GFS2_DIF_TOPDIR
))
648 aflags
|= GFS2_AF_ORLOV
;
650 error
= alloc_dinode(ip
, aflags
);
652 goto fail_free_inode
;
654 error
= gfs2_glock_get(sdp
, ip
->i_no_addr
, &gfs2_inode_glops
, CREATE
, &ip
->i_gl
);
656 goto fail_free_inode
;
658 ip
->i_gl
->gl_object
= ip
;
659 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, GL_SKIP
, ghs
+ 1);
661 goto fail_free_inode
;
663 error
= gfs2_trans_begin(sdp
, RES_DINODE
, 0);
667 init_dinode(dip
, ip
, symname
);
670 error
= gfs2_glock_get(sdp
, ip
->i_no_addr
, &gfs2_iopen_glops
, CREATE
, &io_gl
);
674 error
= gfs2_glock_nq_init(io_gl
, LM_ST_SHARED
, GL_EXACT
, &ip
->i_iopen_gh
);
678 ip
->i_iopen_gh
.gh_gl
->gl_object
= ip
;
679 gfs2_glock_put(io_gl
);
681 insert_inode_hash(inode
);
683 error
= gfs2_acl_create(dip
, inode
);
687 error
= gfs2_security_init(dip
, ip
, name
);
691 error
= link_dinode(dip
, name
, ip
, arq
);
695 mark_inode_dirty(inode
);
696 d_instantiate(dentry
, inode
);
698 *opened
|= FILE_CREATED
;
699 error
= finish_open(file
, dentry
, gfs2_open_common
, opened
);
701 gfs2_glock_dq_uninit(ghs
);
702 gfs2_glock_dq_uninit(ghs
+ 1);
706 gfs2_glock_dq_uninit(ghs
+ 1);
708 gfs2_glock_put(ip
->i_gl
);
712 gfs2_glock_dq_uninit(ghs
+ 1);
715 gfs2_glock_put(ip
->i_gl
);
717 free_inode_nonrcu(inode
);
720 gfs2_glock_dq_uninit(ghs
);
721 if (inode
&& !IS_ERR(inode
)) {
723 mark_inode_dirty(inode
);
724 set_bit(GIF_ALLOC_FAILED
, &GFS2_I(inode
)->i_flags
);
732 * gfs2_create - Create a file
733 * @dir: The directory in which to create the file
734 * @dentry: The dentry of the new file
735 * @mode: The mode of the new file
740 static int gfs2_create(struct inode
*dir
, struct dentry
*dentry
,
741 umode_t mode
, bool excl
)
743 return gfs2_create_inode(dir
, dentry
, NULL
, S_IFREG
| mode
, 0, NULL
, 0, excl
, NULL
);
747 * __gfs2_lookup - Look up a filename in a directory and return its inode
748 * @dir: The directory inode
749 * @dentry: The dentry of the new inode
750 * @file: File to be opened
751 * @opened: atomic_open flags
757 static struct dentry
*__gfs2_lookup(struct inode
*dir
, struct dentry
*dentry
,
758 struct file
*file
, int *opened
)
762 struct gfs2_holder gh
;
763 struct gfs2_glock
*gl
;
766 inode
= gfs2_lookupi(dir
, &dentry
->d_name
, 0);
770 return ERR_CAST(inode
);
772 gl
= GFS2_I(inode
)->i_gl
;
773 error
= gfs2_glock_nq_init(gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
776 return ERR_PTR(error
);
779 d
= d_splice_alias(inode
, dentry
);
780 if (file
&& S_ISREG(inode
->i_mode
))
781 error
= finish_open(file
, dentry
, gfs2_open_common
, opened
);
783 gfs2_glock_dq_uninit(&gh
);
785 return ERR_PTR(error
);
789 static struct dentry
*gfs2_lookup(struct inode
*dir
, struct dentry
*dentry
,
792 return __gfs2_lookup(dir
, dentry
, NULL
, NULL
);
796 * gfs2_link - Link to a file
797 * @old_dentry: The inode to link
798 * @dir: Add link to this directory
799 * @dentry: The name of the link
801 * Link the inode in "old_dentry" into the directory "dir" with the
807 static int gfs2_link(struct dentry
*old_dentry
, struct inode
*dir
,
808 struct dentry
*dentry
)
810 struct gfs2_inode
*dip
= GFS2_I(dir
);
811 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
812 struct inode
*inode
= old_dentry
->d_inode
;
813 struct gfs2_inode
*ip
= GFS2_I(inode
);
814 struct gfs2_holder ghs
[2];
815 struct buffer_head
*dibh
;
819 if (S_ISDIR(inode
->i_mode
))
822 error
= gfs2_rs_alloc(dip
);
826 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
827 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
829 error
= gfs2_glock_nq(ghs
); /* parent */
833 error
= gfs2_glock_nq(ghs
+ 1); /* child */
838 if (inode
->i_nlink
== 0)
841 error
= gfs2_permission(dir
, MAY_WRITE
| MAY_EXEC
);
845 error
= gfs2_dir_check(dir
, &dentry
->d_name
, NULL
);
856 if (!dip
->i_inode
.i_nlink
)
859 if (dip
->i_entries
== (u32
)-1)
862 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
865 if (!ip
->i_inode
.i_nlink
)
868 if (ip
->i_inode
.i_nlink
== (u32
)-1)
871 alloc_required
= error
= gfs2_diradd_alloc_required(dir
, &dentry
->d_name
);
876 if (alloc_required
) {
877 error
= gfs2_quota_lock_check(dip
);
881 error
= gfs2_inplace_reserve(dip
, sdp
->sd_max_dirres
, 0);
885 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
886 gfs2_rg_blocks(dip
, sdp
->sd_max_dirres
) +
887 2 * RES_DINODE
+ RES_STATFS
+
892 error
= gfs2_trans_begin(sdp
, 2 * RES_DINODE
+ RES_LEAF
, 0);
897 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
901 error
= gfs2_dir_add(dir
, &dentry
->d_name
, ip
);
905 gfs2_trans_add_meta(ip
->i_gl
, dibh
);
906 inc_nlink(&ip
->i_inode
);
907 ip
->i_inode
.i_ctime
= CURRENT_TIME
;
909 d_instantiate(dentry
, inode
);
910 mark_inode_dirty(inode
);
918 gfs2_inplace_release(dip
);
921 gfs2_quota_unlock(dip
);
923 gfs2_glock_dq(ghs
+ 1);
927 gfs2_holder_uninit(ghs
);
928 gfs2_holder_uninit(ghs
+ 1);
933 * gfs2_unlink_ok - check to see that a inode is still in a directory
934 * @dip: the directory
935 * @name: the name of the file
938 * Assumes that the lock on (at least) @dip is held.
940 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
943 static int gfs2_unlink_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
944 const struct gfs2_inode
*ip
)
948 if (IS_IMMUTABLE(&ip
->i_inode
) || IS_APPEND(&ip
->i_inode
))
951 if ((dip
->i_inode
.i_mode
& S_ISVTX
) &&
952 !uid_eq(dip
->i_inode
.i_uid
, current_fsuid()) &&
953 !uid_eq(ip
->i_inode
.i_uid
, current_fsuid()) && !capable(CAP_FOWNER
))
956 if (IS_APPEND(&dip
->i_inode
))
959 error
= gfs2_permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
);
963 error
= gfs2_dir_check(&dip
->i_inode
, name
, ip
);
971 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
972 * @dip: The parent directory
973 * @name: The name of the entry in the parent directory
974 * @inode: The inode to be removed
976 * Called with all the locks and in a transaction. This will only be
977 * called for a directory after it has been checked to ensure it is empty.
979 * Returns: 0 on success, or an error
982 static int gfs2_unlink_inode(struct gfs2_inode
*dip
,
983 const struct dentry
*dentry
)
985 struct inode
*inode
= dentry
->d_inode
;
986 struct gfs2_inode
*ip
= GFS2_I(inode
);
989 error
= gfs2_dir_del(dip
, dentry
);
994 inode
->i_ctime
= CURRENT_TIME
;
995 if (S_ISDIR(inode
->i_mode
))
999 mark_inode_dirty(inode
);
1000 if (inode
->i_nlink
== 0)
1001 gfs2_unlink_di(inode
);
1007 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1008 * @dir: The inode of the directory containing the inode to unlink
1009 * @dentry: The file itself
1011 * This routine uses the type of the inode as a flag to figure out
1012 * whether this is an unlink or an rmdir.
1017 static int gfs2_unlink(struct inode
*dir
, struct dentry
*dentry
)
1019 struct gfs2_inode
*dip
= GFS2_I(dir
);
1020 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
1021 struct inode
*inode
= dentry
->d_inode
;
1022 struct gfs2_inode
*ip
= GFS2_I(inode
);
1023 struct gfs2_holder ghs
[3];
1024 struct gfs2_rgrpd
*rgd
;
1027 error
= gfs2_rindex_update(sdp
);
1033 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
1034 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
1036 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_no_addr
, 1);
1040 gfs2_holder_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 2);
1043 error
= gfs2_glock_nq(ghs
); /* parent */
1047 error
= gfs2_glock_nq(ghs
+ 1); /* child */
1052 if (inode
->i_nlink
== 0)
1055 if (S_ISDIR(inode
->i_mode
)) {
1057 if (ip
->i_entries
> 2 || inode
->i_nlink
> 2)
1061 error
= gfs2_glock_nq(ghs
+ 2); /* rgrp */
1065 error
= gfs2_unlink_ok(dip
, &dentry
->d_name
, ip
);
1069 error
= gfs2_trans_begin(sdp
, 2*RES_DINODE
+ 3*RES_LEAF
+ RES_RG_BIT
, 0);
1073 error
= gfs2_unlink_inode(dip
, dentry
);
1076 gfs2_trans_end(sdp
);
1078 gfs2_glock_dq(ghs
+ 2);
1080 gfs2_glock_dq(ghs
+ 1);
1084 gfs2_holder_uninit(ghs
+ 2);
1086 gfs2_holder_uninit(ghs
+ 1);
1087 gfs2_holder_uninit(ghs
);
1092 * gfs2_symlink - Create a symlink
1093 * @dir: The directory to create the symlink in
1094 * @dentry: The dentry to put the symlink in
1095 * @symname: The thing which the link points to
1100 static int gfs2_symlink(struct inode
*dir
, struct dentry
*dentry
,
1101 const char *symname
)
1103 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
1106 size
= strlen(symname
);
1107 if (size
> sdp
->sd_sb
.sb_bsize
- sizeof(struct gfs2_dinode
) - 1)
1108 return -ENAMETOOLONG
;
1110 return gfs2_create_inode(dir
, dentry
, NULL
, S_IFLNK
| S_IRWXUGO
, 0, symname
, size
, 0, NULL
);
1114 * gfs2_mkdir - Make a directory
1115 * @dir: The parent directory of the new one
1116 * @dentry: The dentry of the new directory
1117 * @mode: The mode of the new directory
1122 static int gfs2_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1124 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
1125 unsigned dsize
= sdp
->sd_sb
.sb_bsize
- sizeof(struct gfs2_dinode
);
1126 return gfs2_create_inode(dir
, dentry
, NULL
, S_IFDIR
| mode
, 0, NULL
, dsize
, 0, NULL
);
1130 * gfs2_mknod - Make a special file
1131 * @dir: The directory in which the special file will reside
1132 * @dentry: The dentry of the special file
1133 * @mode: The mode of the special file
1134 * @dev: The device specification of the special file
1138 static int gfs2_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
1141 return gfs2_create_inode(dir
, dentry
, NULL
, mode
, dev
, NULL
, 0, 0, NULL
);
1145 * gfs2_atomic_open - Atomically open a file
1146 * @dir: The directory
1147 * @dentry: The proposed new entry
1148 * @file: The proposed new struct file
1149 * @flags: open flags
1151 * @opened: Flag to say whether the file has been opened or not
1153 * Returns: error code or 0 for success
1156 static int gfs2_atomic_open(struct inode
*dir
, struct dentry
*dentry
,
1157 struct file
*file
, unsigned flags
,
1158 umode_t mode
, int *opened
)
1161 bool excl
= !!(flags
& O_EXCL
);
1163 d
= __gfs2_lookup(dir
, dentry
, file
, opened
);
1169 if (!(*opened
& FILE_OPENED
))
1170 return finish_no_open(file
, d
);
1174 if (!(flags
& O_CREAT
))
1177 return gfs2_create_inode(dir
, dentry
, file
, S_IFREG
| mode
, 0, NULL
, 0, excl
, opened
);
1181 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1185 * Follow @to back to the root and make sure we don't encounter @this
1186 * Assumes we already hold the rename lock.
1191 static int gfs2_ok_to_move(struct gfs2_inode
*this, struct gfs2_inode
*to
)
1193 struct inode
*dir
= &to
->i_inode
;
1194 struct super_block
*sb
= dir
->i_sb
;
1201 if (dir
== &this->i_inode
) {
1205 if (dir
== sb
->s_root
->d_inode
) {
1210 tmp
= gfs2_lookupi(dir
, &gfs2_qdotdot
, 1);
1212 error
= PTR_ERR(tmp
);
1226 * gfs2_rename - Rename a file
1227 * @odir: Parent directory of old file name
1228 * @odentry: The old dentry of the file
1229 * @ndir: Parent directory of new file name
1230 * @ndentry: The new dentry of the file
1235 static int gfs2_rename(struct inode
*odir
, struct dentry
*odentry
,
1236 struct inode
*ndir
, struct dentry
*ndentry
)
1238 struct gfs2_inode
*odip
= GFS2_I(odir
);
1239 struct gfs2_inode
*ndip
= GFS2_I(ndir
);
1240 struct gfs2_inode
*ip
= GFS2_I(odentry
->d_inode
);
1241 struct gfs2_inode
*nip
= NULL
;
1242 struct gfs2_sbd
*sdp
= GFS2_SB(odir
);
1243 struct gfs2_holder ghs
[5], r_gh
= { .gh_gl
= NULL
, };
1244 struct gfs2_rgrpd
*nrgd
;
1245 unsigned int num_gh
;
1247 int alloc_required
= 0;
1251 if (ndentry
->d_inode
) {
1252 nip
= GFS2_I(ndentry
->d_inode
);
1257 error
= gfs2_rindex_update(sdp
);
1261 error
= gfs2_rs_alloc(ndip
);
1266 error
= gfs2_glock_nq_init(sdp
->sd_rename_gl
, LM_ST_EXCLUSIVE
,
1271 if (S_ISDIR(ip
->i_inode
.i_mode
)) {
1273 /* don't move a dirctory into it's subdir */
1274 error
= gfs2_ok_to_move(ip
, ndip
);
1281 gfs2_holder_init(odip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
1283 gfs2_holder_init(ndip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
1286 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
1290 gfs2_holder_init(nip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
1292 /* grab the resource lock for unlink flag twiddling
1293 * this is the case of the target file already existing
1294 * so we unlink before doing the rename
1296 nrgd
= gfs2_blk2rgrpd(sdp
, nip
->i_no_addr
, 1);
1298 gfs2_holder_init(nrgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
++);
1301 for (x
= 0; x
< num_gh
; x
++) {
1302 error
= gfs2_glock_nq(ghs
+ x
);
1308 if (ip
->i_inode
.i_nlink
== 0)
1311 /* Check out the old directory */
1313 error
= gfs2_unlink_ok(odip
, &odentry
->d_name
, ip
);
1317 /* Check out the new directory */
1320 error
= gfs2_unlink_ok(ndip
, &ndentry
->d_name
, nip
);
1324 if (nip
->i_inode
.i_nlink
== 0) {
1329 if (S_ISDIR(nip
->i_inode
.i_mode
)) {
1330 if (nip
->i_entries
< 2) {
1331 gfs2_consist_inode(nip
);
1335 if (nip
->i_entries
> 2) {
1341 error
= gfs2_permission(ndir
, MAY_WRITE
| MAY_EXEC
);
1345 error
= gfs2_dir_check(ndir
, &ndentry
->d_name
, NULL
);
1357 if (!ndip
->i_inode
.i_nlink
) {
1361 if (ndip
->i_entries
== (u32
)-1) {
1365 if (S_ISDIR(ip
->i_inode
.i_mode
) &&
1366 ndip
->i_inode
.i_nlink
== (u32
)-1) {
1373 /* Check out the dir to be renamed */
1376 error
= gfs2_permission(odentry
->d_inode
, MAY_WRITE
);
1382 alloc_required
= gfs2_diradd_alloc_required(ndir
, &ndentry
->d_name
);
1383 error
= alloc_required
;
1387 if (alloc_required
) {
1388 error
= gfs2_quota_lock_check(ndip
);
1392 error
= gfs2_inplace_reserve(ndip
, sdp
->sd_max_dirres
, 0);
1396 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
1397 gfs2_rg_blocks(ndip
, sdp
->sd_max_dirres
) +
1398 4 * RES_DINODE
+ 4 * RES_LEAF
+
1399 RES_STATFS
+ RES_QUOTA
+ 4, 0);
1403 error
= gfs2_trans_begin(sdp
, 4 * RES_DINODE
+
1404 5 * RES_LEAF
+ 4, 0);
1409 /* Remove the target file, if it exists */
1412 error
= gfs2_unlink_inode(ndip
, ndentry
);
1415 error
= gfs2_dir_mvino(ip
, &gfs2_qdotdot
, ndip
, DT_DIR
);
1419 struct buffer_head
*dibh
;
1420 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1423 ip
->i_inode
.i_ctime
= CURRENT_TIME
;
1424 gfs2_trans_add_meta(ip
->i_gl
, dibh
);
1425 gfs2_dinode_out(ip
, dibh
->b_data
);
1429 error
= gfs2_dir_del(odip
, odentry
);
1433 error
= gfs2_dir_add(ndir
, &ndentry
->d_name
, ip
);
1438 gfs2_trans_end(sdp
);
1441 gfs2_inplace_release(ndip
);
1444 gfs2_quota_unlock(ndip
);
1447 gfs2_glock_dq(ghs
+ x
);
1448 gfs2_holder_uninit(ghs
+ x
);
1452 gfs2_glock_dq_uninit(&r_gh
);
1458 * gfs2_follow_link - Follow a symbolic link
1459 * @dentry: The dentry of the link
1460 * @nd: Data that we pass to vfs_follow_link()
1462 * This can handle symlinks of any size.
1464 * Returns: 0 on success or error code
1467 static void *gfs2_follow_link(struct dentry
*dentry
, struct nameidata
*nd
)
1469 struct gfs2_inode
*ip
= GFS2_I(dentry
->d_inode
);
1470 struct gfs2_holder i_gh
;
1471 struct buffer_head
*dibh
;
1476 gfs2_holder_init(ip
->i_gl
, LM_ST_SHARED
, 0, &i_gh
);
1477 error
= gfs2_glock_nq(&i_gh
);
1479 gfs2_holder_uninit(&i_gh
);
1480 nd_set_link(nd
, ERR_PTR(error
));
1484 size
= (unsigned int)i_size_read(&ip
->i_inode
);
1486 gfs2_consist_inode(ip
);
1487 buf
= ERR_PTR(-EIO
);
1491 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1493 buf
= ERR_PTR(error
);
1497 buf
= kzalloc(size
+ 1, GFP_NOFS
);
1499 buf
= ERR_PTR(-ENOMEM
);
1501 memcpy(buf
, dibh
->b_data
+ sizeof(struct gfs2_dinode
), size
);
1504 gfs2_glock_dq_uninit(&i_gh
);
1505 nd_set_link(nd
, buf
);
1509 static void gfs2_put_link(struct dentry
*dentry
, struct nameidata
*nd
, void *p
)
1511 char *s
= nd_get_link(nd
);
1519 * @mask: The mask to be tested
1520 * @flags: Indicates whether this is an RCU path walk or not
1522 * This may be called from the VFS directly, or from within GFS2 with the
1523 * inode locked, so we look to see if the glock is already locked and only
1524 * lock the glock if its not already been done.
1529 int gfs2_permission(struct inode
*inode
, int mask
)
1531 struct gfs2_inode
*ip
;
1532 struct gfs2_holder i_gh
;
1538 if (gfs2_glock_is_locked_by_me(ip
->i_gl
) == NULL
) {
1539 if (mask
& MAY_NOT_BLOCK
)
1541 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &i_gh
);
1547 if ((mask
& MAY_WRITE
) && IS_IMMUTABLE(inode
))
1550 error
= generic_permission(inode
, mask
);
1552 gfs2_glock_dq_uninit(&i_gh
);
1557 static int __gfs2_setattr_simple(struct inode
*inode
, struct iattr
*attr
)
1559 setattr_copy(inode
, attr
);
1560 mark_inode_dirty(inode
);
1565 * gfs2_setattr_simple -
1572 int gfs2_setattr_simple(struct inode
*inode
, struct iattr
*attr
)
1576 if (current
->journal_info
)
1577 return __gfs2_setattr_simple(inode
, attr
);
1579 error
= gfs2_trans_begin(GFS2_SB(inode
), RES_DINODE
, 0);
1583 error
= __gfs2_setattr_simple(inode
, attr
);
1584 gfs2_trans_end(GFS2_SB(inode
));
1588 static int setattr_chown(struct inode
*inode
, struct iattr
*attr
)
1590 struct gfs2_inode
*ip
= GFS2_I(inode
);
1591 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
1596 ouid
= inode
->i_uid
;
1597 ogid
= inode
->i_gid
;
1598 nuid
= attr
->ia_uid
;
1599 ngid
= attr
->ia_gid
;
1601 if (!(attr
->ia_valid
& ATTR_UID
) || uid_eq(ouid
, nuid
))
1602 ouid
= nuid
= NO_UID_QUOTA_CHANGE
;
1603 if (!(attr
->ia_valid
& ATTR_GID
) || gid_eq(ogid
, ngid
))
1604 ogid
= ngid
= NO_GID_QUOTA_CHANGE
;
1606 error
= gfs2_quota_lock(ip
, nuid
, ngid
);
1610 if (!uid_eq(ouid
, NO_UID_QUOTA_CHANGE
) ||
1611 !gid_eq(ogid
, NO_GID_QUOTA_CHANGE
)) {
1612 error
= gfs2_quota_check(ip
, nuid
, ngid
);
1617 error
= gfs2_trans_begin(sdp
, RES_DINODE
+ 2 * RES_QUOTA
, 0);
1621 error
= gfs2_setattr_simple(inode
, attr
);
1625 if (!uid_eq(ouid
, NO_UID_QUOTA_CHANGE
) ||
1626 !gid_eq(ogid
, NO_GID_QUOTA_CHANGE
)) {
1627 u64 blocks
= gfs2_get_inode_blocks(&ip
->i_inode
);
1628 gfs2_quota_change(ip
, -blocks
, ouid
, ogid
);
1629 gfs2_quota_change(ip
, blocks
, nuid
, ngid
);
1633 gfs2_trans_end(sdp
);
1635 gfs2_quota_unlock(ip
);
1640 * gfs2_setattr - Change attributes on an inode
1641 * @dentry: The dentry which is changing
1642 * @attr: The structure describing the change
1644 * The VFS layer wants to change one or more of an inodes attributes. Write
1645 * that change out to disk.
1650 static int gfs2_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1652 struct inode
*inode
= dentry
->d_inode
;
1653 struct gfs2_inode
*ip
= GFS2_I(inode
);
1654 struct gfs2_holder i_gh
;
1657 error
= gfs2_rs_alloc(ip
);
1661 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1666 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
1669 error
= inode_change_ok(inode
, attr
);
1673 if (attr
->ia_valid
& ATTR_SIZE
)
1674 error
= gfs2_setattr_size(inode
, attr
->ia_size
);
1675 else if (attr
->ia_valid
& (ATTR_UID
| ATTR_GID
))
1676 error
= setattr_chown(inode
, attr
);
1677 else if ((attr
->ia_valid
& ATTR_MODE
) && IS_POSIXACL(inode
))
1678 error
= gfs2_acl_chmod(ip
, attr
);
1680 error
= gfs2_setattr_simple(inode
, attr
);
1684 mark_inode_dirty(inode
);
1685 gfs2_glock_dq_uninit(&i_gh
);
1690 * gfs2_getattr - Read out an inode's attributes
1691 * @mnt: The vfsmount the inode is being accessed from
1692 * @dentry: The dentry to stat
1693 * @stat: The inode's stats
1695 * This may be called from the VFS directly, or from within GFS2 with the
1696 * inode locked, so we look to see if the glock is already locked and only
1697 * lock the glock if its not already been done. Note that its the NFS
1698 * readdirplus operation which causes this to be called (from filldir)
1699 * with the glock already held.
1704 static int gfs2_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
1707 struct inode
*inode
= dentry
->d_inode
;
1708 struct gfs2_inode
*ip
= GFS2_I(inode
);
1709 struct gfs2_holder gh
;
1713 if (gfs2_glock_is_locked_by_me(ip
->i_gl
) == NULL
) {
1714 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
1720 generic_fillattr(inode
, stat
);
1722 gfs2_glock_dq_uninit(&gh
);
1727 static int gfs2_setxattr(struct dentry
*dentry
, const char *name
,
1728 const void *data
, size_t size
, int flags
)
1730 struct inode
*inode
= dentry
->d_inode
;
1731 struct gfs2_inode
*ip
= GFS2_I(inode
);
1732 struct gfs2_holder gh
;
1735 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &gh
);
1736 ret
= gfs2_glock_nq(&gh
);
1738 ret
= gfs2_rs_alloc(ip
);
1740 ret
= generic_setxattr(dentry
, name
, data
, size
, flags
);
1743 gfs2_holder_uninit(&gh
);
1747 static ssize_t
gfs2_getxattr(struct dentry
*dentry
, const char *name
,
1748 void *data
, size_t size
)
1750 struct inode
*inode
= dentry
->d_inode
;
1751 struct gfs2_inode
*ip
= GFS2_I(inode
);
1752 struct gfs2_holder gh
;
1755 /* For selinux during lookup */
1756 if (gfs2_glock_is_locked_by_me(ip
->i_gl
))
1757 return generic_getxattr(dentry
, name
, data
, size
);
1759 gfs2_holder_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
1760 ret
= gfs2_glock_nq(&gh
);
1762 ret
= generic_getxattr(dentry
, name
, data
, size
);
1765 gfs2_holder_uninit(&gh
);
1769 static int gfs2_removexattr(struct dentry
*dentry
, const char *name
)
1771 struct inode
*inode
= dentry
->d_inode
;
1772 struct gfs2_inode
*ip
= GFS2_I(inode
);
1773 struct gfs2_holder gh
;
1776 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &gh
);
1777 ret
= gfs2_glock_nq(&gh
);
1779 ret
= gfs2_rs_alloc(ip
);
1781 ret
= generic_removexattr(dentry
, name
);
1784 gfs2_holder_uninit(&gh
);
1788 static int gfs2_fiemap(struct inode
*inode
, struct fiemap_extent_info
*fieinfo
,
1791 struct gfs2_inode
*ip
= GFS2_I(inode
);
1792 struct gfs2_holder gh
;
1795 ret
= fiemap_check_flags(fieinfo
, FIEMAP_FLAG_SYNC
);
1799 mutex_lock(&inode
->i_mutex
);
1801 ret
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &gh
);
1805 if (gfs2_is_stuffed(ip
)) {
1806 u64 phys
= ip
->i_no_addr
<< inode
->i_blkbits
;
1807 u64 size
= i_size_read(inode
);
1808 u32 flags
= FIEMAP_EXTENT_LAST
|FIEMAP_EXTENT_NOT_ALIGNED
|
1809 FIEMAP_EXTENT_DATA_INLINE
;
1810 phys
+= sizeof(struct gfs2_dinode
);
1812 if (start
+ len
> size
)
1815 ret
= fiemap_fill_next_extent(fieinfo
, start
, phys
,
1820 ret
= __generic_block_fiemap(inode
, fieinfo
, start
, len
,
1824 gfs2_glock_dq_uninit(&gh
);
1826 mutex_unlock(&inode
->i_mutex
);
1830 const struct inode_operations gfs2_file_iops
= {
1831 .permission
= gfs2_permission
,
1832 .setattr
= gfs2_setattr
,
1833 .getattr
= gfs2_getattr
,
1834 .setxattr
= gfs2_setxattr
,
1835 .getxattr
= gfs2_getxattr
,
1836 .listxattr
= gfs2_listxattr
,
1837 .removexattr
= gfs2_removexattr
,
1838 .fiemap
= gfs2_fiemap
,
1839 .get_acl
= gfs2_get_acl
,
1842 const struct inode_operations gfs2_dir_iops
= {
1843 .create
= gfs2_create
,
1844 .lookup
= gfs2_lookup
,
1846 .unlink
= gfs2_unlink
,
1847 .symlink
= gfs2_symlink
,
1848 .mkdir
= gfs2_mkdir
,
1849 .rmdir
= gfs2_unlink
,
1850 .mknod
= gfs2_mknod
,
1851 .rename
= gfs2_rename
,
1852 .permission
= gfs2_permission
,
1853 .setattr
= gfs2_setattr
,
1854 .getattr
= gfs2_getattr
,
1855 .setxattr
= gfs2_setxattr
,
1856 .getxattr
= gfs2_getxattr
,
1857 .listxattr
= gfs2_listxattr
,
1858 .removexattr
= gfs2_removexattr
,
1859 .fiemap
= gfs2_fiemap
,
1860 .get_acl
= gfs2_get_acl
,
1861 .atomic_open
= gfs2_atomic_open
,
1864 const struct inode_operations gfs2_symlink_iops
= {
1865 .readlink
= generic_readlink
,
1866 .follow_link
= gfs2_follow_link
,
1867 .put_link
= gfs2_put_link
,
1868 .permission
= gfs2_permission
,
1869 .setattr
= gfs2_setattr
,
1870 .getattr
= gfs2_getattr
,
1871 .setxattr
= gfs2_setxattr
,
1872 .getxattr
= gfs2_getxattr
,
1873 .listxattr
= gfs2_listxattr
,
1874 .removexattr
= gfs2_removexattr
,
1875 .fiemap
= gfs2_fiemap
,
1876 .get_acl
= gfs2_get_acl
,