1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
7 #include <linux/slab.h>
8 #include <linux/spinlock.h>
9 #include <linux/completion.h>
10 #include <linux/buffer_head.h>
11 #include <linux/namei.h>
13 #include <linux/cred.h>
14 #include <linux/xattr.h>
15 #include <linux/posix_acl.h>
16 #include <linux/gfs2_ondisk.h>
17 #include <linux/crc32.h>
18 #include <linux/iomap.h>
19 #include <linux/security.h>
20 #include <linux/uaccess.h>
38 static int iget_test(struct inode
*inode
, void *opaque
)
40 u64 no_addr
= *(u64
*)opaque
;
42 return GFS2_I(inode
)->i_no_addr
== no_addr
;
45 static int iget_set(struct inode
*inode
, void *opaque
)
47 u64 no_addr
= *(u64
*)opaque
;
49 GFS2_I(inode
)->i_no_addr
= no_addr
;
50 inode
->i_ino
= no_addr
;
54 static struct inode
*gfs2_iget(struct super_block
*sb
, u64 no_addr
)
59 inode
= iget5_locked(sb
, no_addr
, iget_test
, iget_set
, &no_addr
);
62 if (is_bad_inode(inode
)) {
70 * gfs2_set_iop - Sets inode operations
71 * @inode: The inode with correct i_mode filled in
73 * GFS2 lookup code fills in vfs inode contents based on info obtained
74 * from directory entry inside gfs2_inode_lookup().
77 static void gfs2_set_iop(struct inode
*inode
)
79 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
80 umode_t mode
= inode
->i_mode
;
83 inode
->i_op
= &gfs2_file_iops
;
84 if (gfs2_localflocks(sdp
))
85 inode
->i_fop
= &gfs2_file_fops_nolock
;
87 inode
->i_fop
= &gfs2_file_fops
;
88 } else if (S_ISDIR(mode
)) {
89 inode
->i_op
= &gfs2_dir_iops
;
90 if (gfs2_localflocks(sdp
))
91 inode
->i_fop
= &gfs2_dir_fops_nolock
;
93 inode
->i_fop
= &gfs2_dir_fops
;
94 } else if (S_ISLNK(mode
)) {
95 inode
->i_op
= &gfs2_symlink_iops
;
97 inode
->i_op
= &gfs2_file_iops
;
98 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
103 * gfs2_inode_lookup - Lookup an inode
104 * @sb: The super block
105 * @type: The type of the inode
106 * @no_addr: The inode number
107 * @no_formal_ino: The inode generation number
108 * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED;
109 * GFS2_BLKST_FREE to indicate not to verify)
111 * If @type is DT_UNKNOWN, the inode type is fetched from disk.
113 * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a
114 * placeholder because it doesn't otherwise make sense), the on-disk block type
115 * is verified to be @blktype.
117 * Returns: A VFS inode, or an error
120 struct inode
*gfs2_inode_lookup(struct super_block
*sb
, unsigned int type
,
121 u64 no_addr
, u64 no_formal_ino
,
122 unsigned int blktype
)
125 struct gfs2_inode
*ip
;
126 struct gfs2_glock
*io_gl
= NULL
;
127 struct gfs2_holder i_gh
;
130 gfs2_holder_mark_uninitialized(&i_gh
);
131 inode
= gfs2_iget(sb
, no_addr
);
133 return ERR_PTR(-ENOMEM
);
137 if (inode
->i_state
& I_NEW
) {
138 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
139 ip
->i_no_formal_ino
= no_formal_ino
;
141 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_inode_glops
, CREATE
, &ip
->i_gl
);
144 flush_delayed_work(&ip
->i_gl
->gl_work
);
146 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_iopen_glops
, CREATE
, &io_gl
);
150 if (type
== DT_UNKNOWN
|| blktype
!= GFS2_BLKST_FREE
) {
152 * The GL_SKIP flag indicates to skip reading the inode
153 * block. We read the inode with gfs2_inode_refresh
154 * after possibly checking the block type.
156 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
,
161 if (blktype
!= GFS2_BLKST_FREE
) {
162 error
= gfs2_check_blk_type(sdp
, no_addr
,
169 glock_set_object(ip
->i_gl
, ip
);
170 set_bit(GIF_INVALID
, &ip
->i_flags
);
171 error
= gfs2_glock_nq_init(io_gl
, LM_ST_SHARED
, GL_EXACT
, &ip
->i_iopen_gh
);
174 glock_set_object(ip
->i_iopen_gh
.gh_gl
, ip
);
175 gfs2_glock_put(io_gl
);
178 if (type
== DT_UNKNOWN
) {
179 /* Inode glock must be locked already */
180 error
= gfs2_inode_refresh(GFS2_I(inode
));
184 inode
->i_mode
= DT2IF(type
);
189 /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
190 inode
->i_atime
.tv_sec
= 1LL << (8 * sizeof(inode
->i_atime
.tv_sec
) - 1);
191 inode
->i_atime
.tv_nsec
= 0;
193 unlock_new_inode(inode
);
196 if (gfs2_holder_initialized(&i_gh
))
197 gfs2_glock_dq_uninit(&i_gh
);
201 ip
->i_iopen_gh
.gh_flags
|= GL_NOCACHE
;
202 glock_clear_object(ip
->i_iopen_gh
.gh_gl
, ip
);
203 gfs2_glock_dq_uninit(&ip
->i_iopen_gh
);
206 gfs2_glock_put(io_gl
);
207 glock_clear_object(ip
->i_gl
, ip
);
208 if (gfs2_holder_initialized(&i_gh
))
209 gfs2_glock_dq_uninit(&i_gh
);
212 return ERR_PTR(error
);
215 struct inode
*gfs2_lookup_by_inum(struct gfs2_sbd
*sdp
, u64 no_addr
,
216 u64
*no_formal_ino
, unsigned int blktype
)
218 struct super_block
*sb
= sdp
->sd_vfs
;
222 inode
= gfs2_inode_lookup(sb
, DT_UNKNOWN
, no_addr
, 0, blktype
);
226 /* Two extra checks for NFS only */
229 if (GFS2_I(inode
)->i_no_formal_ino
!= *no_formal_ino
)
233 if (GFS2_I(inode
)->i_diskflags
& GFS2_DIF_SYSTEM
)
240 return ERR_PTR(error
);
244 struct inode
*gfs2_lookup_simple(struct inode
*dip
, const char *name
)
248 gfs2_str2qstr(&qstr
, name
);
249 inode
= gfs2_lookupi(dip
, &qstr
, 1);
250 /* gfs2_lookupi has inconsistent callers: vfs
251 * related routines expect NULL for no entry found,
252 * gfs2_lookup_simple callers expect ENOENT
253 * and do not check for NULL.
256 return ERR_PTR(-ENOENT
);
263 * gfs2_lookupi - Look up a filename in a directory and return its inode
264 * @d_gh: An initialized holder for the directory glock
265 * @name: The name of the inode to look for
266 * @is_root: If 1, ignore the caller's permissions
267 * @i_gh: An uninitialized holder for the new inode glock
269 * This can be called via the VFS filldir function when NFS is doing
270 * a readdirplus and the inode which its intending to stat isn't
271 * already in cache. In this case we must not take the directory glock
272 * again, since the readdir call will have already taken that lock.
277 struct inode
*gfs2_lookupi(struct inode
*dir
, const struct qstr
*name
,
280 struct super_block
*sb
= dir
->i_sb
;
281 struct gfs2_inode
*dip
= GFS2_I(dir
);
282 struct gfs2_holder d_gh
;
284 struct inode
*inode
= NULL
;
286 gfs2_holder_mark_uninitialized(&d_gh
);
287 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
288 return ERR_PTR(-ENAMETOOLONG
);
290 if ((name
->len
== 1 && memcmp(name
->name
, ".", 1) == 0) ||
291 (name
->len
== 2 && memcmp(name
->name
, "..", 2) == 0 &&
292 dir
== d_inode(sb
->s_root
))) {
297 if (gfs2_glock_is_locked_by_me(dip
->i_gl
) == NULL
) {
298 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_SHARED
, 0, &d_gh
);
300 return ERR_PTR(error
);
304 error
= gfs2_permission(dir
, MAY_EXEC
);
309 inode
= gfs2_dir_search(dir
, name
, false);
311 error
= PTR_ERR(inode
);
313 if (gfs2_holder_initialized(&d_gh
))
314 gfs2_glock_dq_uninit(&d_gh
);
315 if (error
== -ENOENT
)
317 return inode
? inode
: ERR_PTR(error
);
321 * create_ok - OK to create a new on-disk inode here?
322 * @dip: Directory in which dinode is to be created
323 * @name: Name of new dinode
329 static int create_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
334 error
= gfs2_permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
);
338 /* Don't create entries in an unlinked directory */
339 if (!dip
->i_inode
.i_nlink
)
342 if (dip
->i_entries
== (u32
)-1)
344 if (S_ISDIR(mode
) && dip
->i_inode
.i_nlink
== (u32
)-1)
350 static void munge_mode_uid_gid(const struct gfs2_inode
*dip
,
353 if (GFS2_SB(&dip
->i_inode
)->sd_args
.ar_suiddir
&&
354 (dip
->i_inode
.i_mode
& S_ISUID
) &&
355 !uid_eq(dip
->i_inode
.i_uid
, GLOBAL_ROOT_UID
)) {
356 if (S_ISDIR(inode
->i_mode
))
357 inode
->i_mode
|= S_ISUID
;
358 else if (!uid_eq(dip
->i_inode
.i_uid
, current_fsuid()))
359 inode
->i_mode
&= ~07111;
360 inode
->i_uid
= dip
->i_inode
.i_uid
;
362 inode
->i_uid
= current_fsuid();
364 if (dip
->i_inode
.i_mode
& S_ISGID
) {
365 if (S_ISDIR(inode
->i_mode
))
366 inode
->i_mode
|= S_ISGID
;
367 inode
->i_gid
= dip
->i_inode
.i_gid
;
369 inode
->i_gid
= current_fsgid();
372 static int alloc_dinode(struct gfs2_inode
*ip
, u32 flags
, unsigned *dblocks
)
374 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
375 struct gfs2_alloc_parms ap
= { .target
= *dblocks
, .aflags
= flags
, };
378 error
= gfs2_quota_lock_check(ip
, &ap
);
382 error
= gfs2_inplace_reserve(ip
, &ap
);
386 error
= gfs2_trans_begin(sdp
, (*dblocks
* RES_RG_BIT
) + RES_STATFS
+ RES_QUOTA
, 0);
390 error
= gfs2_alloc_blocks(ip
, &ip
->i_no_addr
, dblocks
, 1, &ip
->i_generation
);
391 ip
->i_no_formal_ino
= ip
->i_generation
;
392 ip
->i_inode
.i_ino
= ip
->i_no_addr
;
393 ip
->i_goal
= ip
->i_no_addr
;
398 gfs2_inplace_release(ip
);
400 gfs2_quota_unlock(ip
);
405 static void gfs2_init_dir(struct buffer_head
*dibh
,
406 const struct gfs2_inode
*parent
)
408 struct gfs2_dinode
*di
= (struct gfs2_dinode
*)dibh
->b_data
;
409 struct gfs2_dirent
*dent
= (struct gfs2_dirent
*)(di
+1);
411 gfs2_qstr2dirent(&gfs2_qdot
, GFS2_DIRENT_SIZE(gfs2_qdot
.len
), dent
);
412 dent
->de_inum
= di
->di_num
; /* already GFS2 endian */
413 dent
->de_type
= cpu_to_be16(DT_DIR
);
415 dent
= (struct gfs2_dirent
*)((char*)dent
+ GFS2_DIRENT_SIZE(1));
416 gfs2_qstr2dirent(&gfs2_qdotdot
, dibh
->b_size
- GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode
), dent
);
417 gfs2_inum_out(parent
, dent
);
418 dent
->de_type
= cpu_to_be16(DT_DIR
);
423 * gfs2_init_xattr - Initialise an xattr block for a new inode
424 * @ip: The inode in question
426 * This sets up an empty xattr block for a new inode, ready to
427 * take any ACLs, LSM xattrs, etc.
430 static void gfs2_init_xattr(struct gfs2_inode
*ip
)
432 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
433 struct buffer_head
*bh
;
434 struct gfs2_ea_header
*ea
;
436 bh
= gfs2_meta_new(ip
->i_gl
, ip
->i_eattr
);
437 gfs2_trans_add_meta(ip
->i_gl
, bh
);
438 gfs2_metatype_set(bh
, GFS2_METATYPE_EA
, GFS2_FORMAT_EA
);
439 gfs2_buffer_clear_tail(bh
, sizeof(struct gfs2_meta_header
));
441 ea
= GFS2_EA_BH2FIRST(bh
);
442 ea
->ea_rec_len
= cpu_to_be32(sdp
->sd_jbsize
);
443 ea
->ea_type
= GFS2_EATYPE_UNUSED
;
444 ea
->ea_flags
= GFS2_EAFLAG_LAST
;
450 * init_dinode - Fill in a new dinode structure
451 * @dip: The directory this inode is being created in
453 * @symname: The symlink destination (if a symlink)
454 * @bhp: The buffer head (returned to caller)
458 static void init_dinode(struct gfs2_inode
*dip
, struct gfs2_inode
*ip
,
461 struct gfs2_dinode
*di
;
462 struct buffer_head
*dibh
;
464 dibh
= gfs2_meta_new(ip
->i_gl
, ip
->i_no_addr
);
465 gfs2_trans_add_meta(ip
->i_gl
, dibh
);
466 di
= (struct gfs2_dinode
*)dibh
->b_data
;
467 gfs2_dinode_out(ip
, di
);
469 di
->di_major
= cpu_to_be32(MAJOR(ip
->i_inode
.i_rdev
));
470 di
->di_minor
= cpu_to_be32(MINOR(ip
->i_inode
.i_rdev
));
474 memset(&di
->__pad4
, 0, sizeof(di
->__pad4
));
475 memset(&di
->di_reserved
, 0, sizeof(di
->di_reserved
));
476 gfs2_buffer_clear_tail(dibh
, sizeof(struct gfs2_dinode
));
478 switch(ip
->i_inode
.i_mode
& S_IFMT
) {
480 gfs2_init_dir(dibh
, dip
);
483 memcpy(dibh
->b_data
+ sizeof(struct gfs2_dinode
), symname
, ip
->i_inode
.i_size
);
487 set_buffer_uptodate(dibh
);
492 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
493 * @dip: The directory we are linking into
494 * @da: The dir add information
495 * @nr_inodes: The number of inodes involved
497 * This calculate the number of blocks we need to reserve in a
498 * transaction to link @nr_inodes into a directory. In most cases
499 * @nr_inodes will be 2 (the directory plus the inode being linked in)
500 * but in case of rename, 4 may be required.
502 * Returns: Number of blocks
505 static unsigned gfs2_trans_da_blks(const struct gfs2_inode
*dip
,
506 const struct gfs2_diradd
*da
,
509 return da
->nr_blocks
+ gfs2_rg_blocks(dip
, da
->nr_blocks
) +
510 (nr_inodes
* RES_DINODE
) + RES_QUOTA
+ RES_STATFS
;
513 static int link_dinode(struct gfs2_inode
*dip
, const struct qstr
*name
,
514 struct gfs2_inode
*ip
, struct gfs2_diradd
*da
)
516 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
517 struct gfs2_alloc_parms ap
= { .target
= da
->nr_blocks
, };
521 error
= gfs2_quota_lock_check(dip
, &ap
);
523 goto fail_quota_locks
;
525 error
= gfs2_inplace_reserve(dip
, &ap
);
527 goto fail_quota_locks
;
529 error
= gfs2_trans_begin(sdp
, gfs2_trans_da_blks(dip
, da
, 2), 0);
533 error
= gfs2_trans_begin(sdp
, RES_LEAF
+ 2 * RES_DINODE
, 0);
535 goto fail_quota_locks
;
538 error
= gfs2_dir_add(&dip
->i_inode
, name
, ip
, da
);
542 gfs2_inplace_release(dip
);
544 gfs2_quota_unlock(dip
);
548 static int gfs2_initxattrs(struct inode
*inode
, const struct xattr
*xattr_array
,
551 const struct xattr
*xattr
;
554 for (xattr
= xattr_array
; xattr
->name
!= NULL
; xattr
++) {
555 err
= __gfs2_xattr_set(inode
, xattr
->name
, xattr
->value
,
557 GFS2_EATYPE_SECURITY
);
565 * gfs2_create_inode - Create a new inode
566 * @dir: The parent directory
567 * @dentry: The new dentry
568 * @file: If non-NULL, the file which is being opened
569 * @mode: The permissions on the new inode
570 * @dev: For device nodes, this is the device number
571 * @symname: For symlinks, this is the link destination
572 * @size: The initial size of the inode (ignored for directories)
574 * Returns: 0 on success, or error code
577 static int gfs2_create_inode(struct inode
*dir
, struct dentry
*dentry
,
579 umode_t mode
, dev_t dev
, const char *symname
,
580 unsigned int size
, int excl
)
582 const struct qstr
*name
= &dentry
->d_name
;
583 struct posix_acl
*default_acl
, *acl
;
584 struct gfs2_holder ghs
[2];
585 struct inode
*inode
= NULL
;
586 struct gfs2_inode
*dip
= GFS2_I(dir
), *ip
;
587 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
588 struct gfs2_glock
*io_gl
= NULL
;
589 int error
, free_vfs_inode
= 1;
592 struct gfs2_diradd da
= { .bh
= NULL
, .save_loc
= 1, };
594 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
595 return -ENAMETOOLONG
;
597 error
= gfs2_rsqa_alloc(dip
);
601 error
= gfs2_rindex_update(sdp
);
605 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
608 gfs2_holder_mark_uninitialized(ghs
+ 1);
610 error
= create_ok(dip
, name
, mode
);
614 inode
= gfs2_dir_search(dir
, &dentry
->d_name
, !S_ISREG(mode
) || excl
);
615 error
= PTR_ERR(inode
);
616 if (!IS_ERR(inode
)) {
617 if (S_ISDIR(inode
->i_mode
)) {
619 inode
= ERR_PTR(-EISDIR
);
622 d_instantiate(dentry
, inode
);
625 if (S_ISREG(inode
->i_mode
))
626 error
= finish_open(file
, dentry
, gfs2_open_common
);
628 error
= finish_no_open(file
, NULL
);
630 gfs2_glock_dq_uninit(ghs
);
632 } else if (error
!= -ENOENT
) {
636 error
= gfs2_diradd_alloc_required(dir
, name
, &da
);
640 inode
= new_inode(sdp
->sd_vfs
);
645 error
= posix_acl_create(dir
, &mode
, &default_acl
, &acl
);
650 error
= gfs2_rsqa_alloc(ip
);
654 inode
->i_mode
= mode
;
655 set_nlink(inode
, S_ISDIR(mode
) ? 2 : 1);
657 inode
->i_size
= size
;
658 inode
->i_atime
= inode
->i_mtime
= inode
->i_ctime
= current_time(inode
);
659 munge_mode_uid_gid(dip
, inode
);
660 check_and_update_goal(dip
);
661 ip
->i_goal
= dip
->i_goal
;
667 ip
->i_no_addr
= 0; /* Temporarily zero until real addr is assigned */
669 switch(mode
& S_IFMT
) {
671 if ((dip
->i_diskflags
& GFS2_DIF_INHERIT_JDATA
) ||
672 gfs2_tune_get(sdp
, gt_new_files_jdata
))
673 ip
->i_diskflags
|= GFS2_DIF_JDATA
;
674 gfs2_set_aops(inode
);
677 ip
->i_diskflags
|= (dip
->i_diskflags
& GFS2_DIF_INHERIT_JDATA
);
678 ip
->i_diskflags
|= GFS2_DIF_JDATA
;
683 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
684 if (dip
->i_diskflags
& GFS2_DIF_SYSTEM
)
685 ip
->i_diskflags
|= GFS2_DIF_SYSTEM
;
687 gfs2_set_inode_flags(inode
);
689 if ((GFS2_I(d_inode(sdp
->sd_root_dir
)) == dip
) ||
690 (dip
->i_diskflags
& GFS2_DIF_TOPDIR
))
691 aflags
|= GFS2_AF_ORLOV
;
693 if (default_acl
|| acl
)
696 error
= alloc_dinode(ip
, aflags
, &blocks
);
698 goto fail_free_inode
;
700 gfs2_set_inode_blocks(inode
, blocks
);
702 error
= gfs2_glock_get(sdp
, ip
->i_no_addr
, &gfs2_inode_glops
, CREATE
, &ip
->i_gl
);
704 goto fail_free_inode
;
705 flush_delayed_work(&ip
->i_gl
->gl_work
);
706 glock_set_object(ip
->i_gl
, ip
);
708 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, GL_SKIP
, ghs
+ 1);
710 goto fail_free_inode
;
712 error
= gfs2_trans_begin(sdp
, blocks
, 0);
714 goto fail_free_inode
;
717 ip
->i_eattr
= ip
->i_no_addr
+ 1;
720 init_dinode(dip
, ip
, symname
);
723 error
= gfs2_glock_get(sdp
, ip
->i_no_addr
, &gfs2_iopen_glops
, CREATE
, &io_gl
);
725 goto fail_free_inode
;
727 BUG_ON(test_and_set_bit(GLF_INODE_CREATING
, &io_gl
->gl_flags
));
729 error
= gfs2_glock_nq_init(io_gl
, LM_ST_SHARED
, GL_EXACT
, &ip
->i_iopen_gh
);
733 glock_set_object(ip
->i_iopen_gh
.gh_gl
, ip
);
735 insert_inode_hash(inode
);
737 free_vfs_inode
= 0; /* After this point, the inode is no longer
738 considered free. Any failures need to undo
739 the gfs2 structures. */
741 error
= __gfs2_set_acl(inode
, default_acl
, ACL_TYPE_DEFAULT
);
744 posix_acl_release(default_acl
);
748 error
= __gfs2_set_acl(inode
, acl
, ACL_TYPE_ACCESS
);
751 posix_acl_release(acl
);
755 error
= security_inode_init_security(&ip
->i_inode
, &dip
->i_inode
, name
,
756 &gfs2_initxattrs
, NULL
);
760 error
= link_dinode(dip
, name
, ip
, &da
);
764 mark_inode_dirty(inode
);
765 d_instantiate(dentry
, inode
);
766 /* After instantiate, errors should result in evict which will destroy
767 * both inode and iopen glocks properly. */
769 file
->f_mode
|= FMODE_CREATED
;
770 error
= finish_open(file
, dentry
, gfs2_open_common
);
772 gfs2_glock_dq_uninit(ghs
);
773 gfs2_glock_dq_uninit(ghs
+ 1);
774 clear_bit(GLF_INODE_CREATING
, &io_gl
->gl_flags
);
775 gfs2_glock_put(io_gl
);
779 glock_clear_object(io_gl
, ip
);
780 gfs2_glock_dq_uninit(&ip
->i_iopen_gh
);
782 clear_bit(GLF_INODE_CREATING
, &io_gl
->gl_flags
);
783 gfs2_glock_put(io_gl
);
786 glock_clear_object(ip
->i_gl
, ip
);
787 gfs2_glock_put(ip
->i_gl
);
789 gfs2_rsqa_delete(ip
, NULL
);
791 posix_acl_release(default_acl
);
792 posix_acl_release(acl
);
794 gfs2_dir_no_add(&da
);
795 gfs2_glock_dq_uninit(ghs
);
796 if (!IS_ERR_OR_NULL(inode
)) {
799 mark_inode_dirty(inode
);
800 set_bit(free_vfs_inode
? GIF_FREE_VFS_INODE
: GIF_ALLOC_FAILED
,
801 &GFS2_I(inode
)->i_flags
);
804 if (gfs2_holder_initialized(ghs
+ 1))
805 gfs2_glock_dq_uninit(ghs
+ 1);
811 * gfs2_create - Create a file
812 * @dir: The directory in which to create the file
813 * @dentry: The dentry of the new file
814 * @mode: The mode of the new file
819 static int gfs2_create(struct inode
*dir
, struct dentry
*dentry
,
820 umode_t mode
, bool excl
)
822 return gfs2_create_inode(dir
, dentry
, NULL
, S_IFREG
| mode
, 0, NULL
, 0, excl
);
826 * __gfs2_lookup - Look up a filename in a directory and return its inode
827 * @dir: The directory inode
828 * @dentry: The dentry of the new inode
829 * @file: File to be opened
835 static struct dentry
*__gfs2_lookup(struct inode
*dir
, struct dentry
*dentry
,
840 struct gfs2_holder gh
;
841 struct gfs2_glock
*gl
;
844 inode
= gfs2_lookupi(dir
, &dentry
->d_name
, 0);
850 return ERR_CAST(inode
);
852 gl
= GFS2_I(inode
)->i_gl
;
853 error
= gfs2_glock_nq_init(gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
856 return ERR_PTR(error
);
859 d
= d_splice_alias(inode
, dentry
);
861 gfs2_glock_dq_uninit(&gh
);
864 if (file
&& S_ISREG(inode
->i_mode
))
865 error
= finish_open(file
, dentry
, gfs2_open_common
);
867 gfs2_glock_dq_uninit(&gh
);
870 return ERR_PTR(error
);
875 static struct dentry
*gfs2_lookup(struct inode
*dir
, struct dentry
*dentry
,
878 return __gfs2_lookup(dir
, dentry
, NULL
);
882 * gfs2_link - Link to a file
883 * @old_dentry: The inode to link
884 * @dir: Add link to this directory
885 * @dentry: The name of the link
887 * Link the inode in "old_dentry" into the directory "dir" with the
893 static int gfs2_link(struct dentry
*old_dentry
, struct inode
*dir
,
894 struct dentry
*dentry
)
896 struct gfs2_inode
*dip
= GFS2_I(dir
);
897 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
898 struct inode
*inode
= d_inode(old_dentry
);
899 struct gfs2_inode
*ip
= GFS2_I(inode
);
900 struct gfs2_holder ghs
[2];
901 struct buffer_head
*dibh
;
902 struct gfs2_diradd da
= { .bh
= NULL
, .save_loc
= 1, };
905 if (S_ISDIR(inode
->i_mode
))
908 error
= gfs2_rsqa_alloc(dip
);
912 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
913 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
915 error
= gfs2_glock_nq(ghs
); /* parent */
919 error
= gfs2_glock_nq(ghs
+ 1); /* child */
924 if (inode
->i_nlink
== 0)
927 error
= gfs2_permission(dir
, MAY_WRITE
| MAY_EXEC
);
931 error
= gfs2_dir_check(dir
, &dentry
->d_name
, NULL
);
942 if (!dip
->i_inode
.i_nlink
)
945 if (dip
->i_entries
== (u32
)-1)
948 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
951 if (!ip
->i_inode
.i_nlink
)
954 if (ip
->i_inode
.i_nlink
== (u32
)-1)
957 error
= gfs2_diradd_alloc_required(dir
, &dentry
->d_name
, &da
);
962 struct gfs2_alloc_parms ap
= { .target
= da
.nr_blocks
, };
963 error
= gfs2_quota_lock_check(dip
, &ap
);
967 error
= gfs2_inplace_reserve(dip
, &ap
);
971 error
= gfs2_trans_begin(sdp
, gfs2_trans_da_blks(dip
, &da
, 2), 0);
975 error
= gfs2_trans_begin(sdp
, 2 * RES_DINODE
+ RES_LEAF
, 0);
980 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
984 error
= gfs2_dir_add(dir
, &dentry
->d_name
, ip
, &da
);
988 gfs2_trans_add_meta(ip
->i_gl
, dibh
);
989 inc_nlink(&ip
->i_inode
);
990 ip
->i_inode
.i_ctime
= current_time(&ip
->i_inode
);
992 d_instantiate(dentry
, inode
);
993 mark_inode_dirty(inode
);
1001 gfs2_inplace_release(dip
);
1004 gfs2_quota_unlock(dip
);
1006 gfs2_dir_no_add(&da
);
1007 gfs2_glock_dq(ghs
+ 1);
1011 gfs2_holder_uninit(ghs
);
1012 gfs2_holder_uninit(ghs
+ 1);
1017 * gfs2_unlink_ok - check to see that a inode is still in a directory
1018 * @dip: the directory
1019 * @name: the name of the file
1022 * Assumes that the lock on (at least) @dip is held.
1024 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1027 static int gfs2_unlink_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
1028 const struct gfs2_inode
*ip
)
1032 if (IS_IMMUTABLE(&ip
->i_inode
) || IS_APPEND(&ip
->i_inode
))
1035 if ((dip
->i_inode
.i_mode
& S_ISVTX
) &&
1036 !uid_eq(dip
->i_inode
.i_uid
, current_fsuid()) &&
1037 !uid_eq(ip
->i_inode
.i_uid
, current_fsuid()) && !capable(CAP_FOWNER
))
1040 if (IS_APPEND(&dip
->i_inode
))
1043 error
= gfs2_permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
);
1047 return gfs2_dir_check(&dip
->i_inode
, name
, ip
);
1051 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1052 * @dip: The parent directory
1053 * @name: The name of the entry in the parent directory
1054 * @inode: The inode to be removed
1056 * Called with all the locks and in a transaction. This will only be
1057 * called for a directory after it has been checked to ensure it is empty.
1059 * Returns: 0 on success, or an error
1062 static int gfs2_unlink_inode(struct gfs2_inode
*dip
,
1063 const struct dentry
*dentry
)
1065 struct inode
*inode
= d_inode(dentry
);
1066 struct gfs2_inode
*ip
= GFS2_I(inode
);
1069 error
= gfs2_dir_del(dip
, dentry
);
1074 inode
->i_ctime
= current_time(inode
);
1075 if (S_ISDIR(inode
->i_mode
))
1079 mark_inode_dirty(inode
);
1080 if (inode
->i_nlink
== 0)
1081 gfs2_unlink_di(inode
);
1087 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1088 * @dir: The inode of the directory containing the inode to unlink
1089 * @dentry: The file itself
1091 * This routine uses the type of the inode as a flag to figure out
1092 * whether this is an unlink or an rmdir.
1097 static int gfs2_unlink(struct inode
*dir
, struct dentry
*dentry
)
1099 struct gfs2_inode
*dip
= GFS2_I(dir
);
1100 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
1101 struct inode
*inode
= d_inode(dentry
);
1102 struct gfs2_inode
*ip
= GFS2_I(inode
);
1103 struct gfs2_holder ghs
[3];
1104 struct gfs2_rgrpd
*rgd
;
1107 error
= gfs2_rindex_update(sdp
);
1113 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
1114 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
1116 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_no_addr
, 1);
1120 gfs2_holder_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 2);
1123 error
= gfs2_glock_nq(ghs
); /* parent */
1127 error
= gfs2_glock_nq(ghs
+ 1); /* child */
1132 if (inode
->i_nlink
== 0)
1135 if (S_ISDIR(inode
->i_mode
)) {
1137 if (ip
->i_entries
> 2 || inode
->i_nlink
> 2)
1141 error
= gfs2_glock_nq(ghs
+ 2); /* rgrp */
1145 error
= gfs2_unlink_ok(dip
, &dentry
->d_name
, ip
);
1149 error
= gfs2_trans_begin(sdp
, 2*RES_DINODE
+ 3*RES_LEAF
+ RES_RG_BIT
, 0);
1153 error
= gfs2_unlink_inode(dip
, dentry
);
1154 gfs2_trans_end(sdp
);
1157 gfs2_glock_dq(ghs
+ 2);
1159 gfs2_glock_dq(ghs
+ 1);
1163 gfs2_holder_uninit(ghs
+ 2);
1165 gfs2_holder_uninit(ghs
+ 1);
1166 gfs2_holder_uninit(ghs
);
1171 * gfs2_symlink - Create a symlink
1172 * @dir: The directory to create the symlink in
1173 * @dentry: The dentry to put the symlink in
1174 * @symname: The thing which the link points to
1179 static int gfs2_symlink(struct inode
*dir
, struct dentry
*dentry
,
1180 const char *symname
)
1184 size
= strlen(symname
);
1185 if (size
>= gfs2_max_stuffed_size(GFS2_I(dir
)))
1186 return -ENAMETOOLONG
;
1188 return gfs2_create_inode(dir
, dentry
, NULL
, S_IFLNK
| S_IRWXUGO
, 0, symname
, size
, 0);
1192 * gfs2_mkdir - Make a directory
1193 * @dir: The parent directory of the new one
1194 * @dentry: The dentry of the new directory
1195 * @mode: The mode of the new directory
1200 static int gfs2_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1202 unsigned dsize
= gfs2_max_stuffed_size(GFS2_I(dir
));
1203 return gfs2_create_inode(dir
, dentry
, NULL
, S_IFDIR
| mode
, 0, NULL
, dsize
, 0);
1207 * gfs2_mknod - Make a special file
1208 * @dir: The directory in which the special file will reside
1209 * @dentry: The dentry of the special file
1210 * @mode: The mode of the special file
1211 * @dev: The device specification of the special file
1215 static int gfs2_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
1218 return gfs2_create_inode(dir
, dentry
, NULL
, mode
, dev
, NULL
, 0, 0);
1222 * gfs2_atomic_open - Atomically open a file
1223 * @dir: The directory
1224 * @dentry: The proposed new entry
1225 * @file: The proposed new struct file
1226 * @flags: open flags
1229 * Returns: error code or 0 for success
1232 static int gfs2_atomic_open(struct inode
*dir
, struct dentry
*dentry
,
1233 struct file
*file
, unsigned flags
,
1237 bool excl
= !!(flags
& O_EXCL
);
1239 if (!d_in_lookup(dentry
))
1242 d
= __gfs2_lookup(dir
, dentry
, file
);
1247 if (d_really_is_positive(dentry
)) {
1248 if (!(file
->f_mode
& FMODE_OPENED
))
1249 return finish_no_open(file
, d
);
1257 if (!(flags
& O_CREAT
))
1260 return gfs2_create_inode(dir
, dentry
, file
, S_IFREG
| mode
, 0, NULL
, 0, excl
);
1264 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1268 * Follow @to back to the root and make sure we don't encounter @this
1269 * Assumes we already hold the rename lock.
1274 static int gfs2_ok_to_move(struct gfs2_inode
*this, struct gfs2_inode
*to
)
1276 struct inode
*dir
= &to
->i_inode
;
1277 struct super_block
*sb
= dir
->i_sb
;
1284 if (dir
== &this->i_inode
) {
1288 if (dir
== d_inode(sb
->s_root
)) {
1293 tmp
= gfs2_lookupi(dir
, &gfs2_qdotdot
, 1);
1299 error
= PTR_ERR(tmp
);
1313 * update_moved_ino - Update an inode that's being moved
1314 * @ip: The inode being moved
1315 * @ndip: The parent directory of the new filename
1316 * @dir_rename: True of ip is a directory
1321 static int update_moved_ino(struct gfs2_inode
*ip
, struct gfs2_inode
*ndip
,
1325 return gfs2_dir_mvino(ip
, &gfs2_qdotdot
, ndip
, DT_DIR
);
1327 ip
->i_inode
.i_ctime
= current_time(&ip
->i_inode
);
1328 mark_inode_dirty_sync(&ip
->i_inode
);
1334 * gfs2_rename - Rename a file
1335 * @odir: Parent directory of old file name
1336 * @odentry: The old dentry of the file
1337 * @ndir: Parent directory of new file name
1338 * @ndentry: The new dentry of the file
1343 static int gfs2_rename(struct inode
*odir
, struct dentry
*odentry
,
1344 struct inode
*ndir
, struct dentry
*ndentry
)
1346 struct gfs2_inode
*odip
= GFS2_I(odir
);
1347 struct gfs2_inode
*ndip
= GFS2_I(ndir
);
1348 struct gfs2_inode
*ip
= GFS2_I(d_inode(odentry
));
1349 struct gfs2_inode
*nip
= NULL
;
1350 struct gfs2_sbd
*sdp
= GFS2_SB(odir
);
1351 struct gfs2_holder ghs
[4], r_gh
, rd_gh
;
1352 struct gfs2_rgrpd
*nrgd
;
1353 unsigned int num_gh
;
1355 struct gfs2_diradd da
= { .nr_blocks
= 0, .save_loc
= 0, };
1359 gfs2_holder_mark_uninitialized(&r_gh
);
1360 gfs2_holder_mark_uninitialized(&rd_gh
);
1361 if (d_really_is_positive(ndentry
)) {
1362 nip
= GFS2_I(d_inode(ndentry
));
1367 error
= gfs2_rindex_update(sdp
);
1371 error
= gfs2_rsqa_alloc(ndip
);
1376 error
= gfs2_glock_nq_init(sdp
->sd_rename_gl
, LM_ST_EXCLUSIVE
,
1381 if (S_ISDIR(ip
->i_inode
.i_mode
)) {
1383 /* don't move a directory into its subdir */
1384 error
= gfs2_ok_to_move(ip
, ndip
);
1391 gfs2_holder_init(odip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
, ghs
);
1393 gfs2_holder_init(ndip
->i_gl
, LM_ST_EXCLUSIVE
,GL_ASYNC
,
1397 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
, ghs
+ num_gh
);
1401 gfs2_holder_init(nip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
,
1406 for (x
= 0; x
< num_gh
; x
++) {
1407 error
= gfs2_glock_nq(ghs
+ x
);
1411 error
= gfs2_glock_async_wait(num_gh
, ghs
);
1416 /* Grab the resource group glock for unlink flag twiddling.
1417 * This is the case where the target dinode already exists
1418 * so we unlink before doing the rename.
1420 nrgd
= gfs2_blk2rgrpd(sdp
, nip
->i_no_addr
, 1);
1425 error
= gfs2_glock_nq_init(nrgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0,
1432 if (ip
->i_inode
.i_nlink
== 0)
1435 /* Check out the old directory */
1437 error
= gfs2_unlink_ok(odip
, &odentry
->d_name
, ip
);
1441 /* Check out the new directory */
1444 error
= gfs2_unlink_ok(ndip
, &ndentry
->d_name
, nip
);
1448 if (nip
->i_inode
.i_nlink
== 0) {
1453 if (S_ISDIR(nip
->i_inode
.i_mode
)) {
1454 if (nip
->i_entries
< 2) {
1455 gfs2_consist_inode(nip
);
1459 if (nip
->i_entries
> 2) {
1465 error
= gfs2_permission(ndir
, MAY_WRITE
| MAY_EXEC
);
1469 error
= gfs2_dir_check(ndir
, &ndentry
->d_name
, NULL
);
1481 if (!ndip
->i_inode
.i_nlink
) {
1485 if (ndip
->i_entries
== (u32
)-1) {
1489 if (S_ISDIR(ip
->i_inode
.i_mode
) &&
1490 ndip
->i_inode
.i_nlink
== (u32
)-1) {
1497 /* Check out the dir to be renamed */
1500 error
= gfs2_permission(d_inode(odentry
), MAY_WRITE
);
1506 error
= gfs2_diradd_alloc_required(ndir
, &ndentry
->d_name
, &da
);
1512 struct gfs2_alloc_parms ap
= { .target
= da
.nr_blocks
, };
1513 error
= gfs2_quota_lock_check(ndip
, &ap
);
1517 error
= gfs2_inplace_reserve(ndip
, &ap
);
1521 error
= gfs2_trans_begin(sdp
, gfs2_trans_da_blks(ndip
, &da
, 4) +
1522 4 * RES_LEAF
+ 4, 0);
1526 error
= gfs2_trans_begin(sdp
, 4 * RES_DINODE
+
1527 5 * RES_LEAF
+ 4, 0);
1532 /* Remove the target file, if it exists */
1535 error
= gfs2_unlink_inode(ndip
, ndentry
);
1537 error
= update_moved_ino(ip
, ndip
, dir_rename
);
1541 error
= gfs2_dir_del(odip
, odentry
);
1545 error
= gfs2_dir_add(ndir
, &ndentry
->d_name
, ip
, &da
);
1550 gfs2_trans_end(sdp
);
1553 gfs2_inplace_release(ndip
);
1556 gfs2_quota_unlock(ndip
);
1558 gfs2_dir_no_add(&da
);
1559 if (gfs2_holder_initialized(&rd_gh
))
1560 gfs2_glock_dq_uninit(&rd_gh
);
1563 if (gfs2_holder_queued(ghs
+ x
))
1564 gfs2_glock_dq(ghs
+ x
);
1565 gfs2_holder_uninit(ghs
+ x
);
1568 if (gfs2_holder_initialized(&r_gh
))
1569 gfs2_glock_dq_uninit(&r_gh
);
1575 * gfs2_exchange - exchange two files
1576 * @odir: Parent directory of old file name
1577 * @odentry: The old dentry of the file
1578 * @ndir: Parent directory of new file name
1579 * @ndentry: The new dentry of the file
1580 * @flags: The rename flags
1585 static int gfs2_exchange(struct inode
*odir
, struct dentry
*odentry
,
1586 struct inode
*ndir
, struct dentry
*ndentry
,
1589 struct gfs2_inode
*odip
= GFS2_I(odir
);
1590 struct gfs2_inode
*ndip
= GFS2_I(ndir
);
1591 struct gfs2_inode
*oip
= GFS2_I(odentry
->d_inode
);
1592 struct gfs2_inode
*nip
= GFS2_I(ndentry
->d_inode
);
1593 struct gfs2_sbd
*sdp
= GFS2_SB(odir
);
1594 struct gfs2_holder ghs
[4], r_gh
;
1595 unsigned int num_gh
;
1597 umode_t old_mode
= oip
->i_inode
.i_mode
;
1598 umode_t new_mode
= nip
->i_inode
.i_mode
;
1601 gfs2_holder_mark_uninitialized(&r_gh
);
1602 error
= gfs2_rindex_update(sdp
);
1607 error
= gfs2_glock_nq_init(sdp
->sd_rename_gl
, LM_ST_EXCLUSIVE
,
1612 if (S_ISDIR(old_mode
)) {
1613 /* don't move a directory into its subdir */
1614 error
= gfs2_ok_to_move(oip
, ndip
);
1619 if (S_ISDIR(new_mode
)) {
1620 /* don't move a directory into its subdir */
1621 error
= gfs2_ok_to_move(nip
, odip
);
1628 gfs2_holder_init(odip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
, ghs
);
1630 gfs2_holder_init(ndip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
,
1634 gfs2_holder_init(oip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
, ghs
+ num_gh
);
1637 gfs2_holder_init(nip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
, ghs
+ num_gh
);
1640 for (x
= 0; x
< num_gh
; x
++) {
1641 error
= gfs2_glock_nq(ghs
+ x
);
1646 error
= gfs2_glock_async_wait(num_gh
, ghs
);
1651 if (oip
->i_inode
.i_nlink
== 0 || nip
->i_inode
.i_nlink
== 0)
1654 error
= gfs2_unlink_ok(odip
, &odentry
->d_name
, oip
);
1657 error
= gfs2_unlink_ok(ndip
, &ndentry
->d_name
, nip
);
1661 if (S_ISDIR(old_mode
)) {
1662 error
= gfs2_permission(odentry
->d_inode
, MAY_WRITE
);
1666 if (S_ISDIR(new_mode
)) {
1667 error
= gfs2_permission(ndentry
->d_inode
, MAY_WRITE
);
1671 error
= gfs2_trans_begin(sdp
, 4 * RES_DINODE
+ 4 * RES_LEAF
, 0);
1675 error
= update_moved_ino(oip
, ndip
, S_ISDIR(old_mode
));
1679 error
= update_moved_ino(nip
, odip
, S_ISDIR(new_mode
));
1683 error
= gfs2_dir_mvino(ndip
, &ndentry
->d_name
, oip
,
1688 error
= gfs2_dir_mvino(odip
, &odentry
->d_name
, nip
,
1694 if (S_ISDIR(new_mode
) && !S_ISDIR(old_mode
)) {
1695 inc_nlink(&odip
->i_inode
);
1696 drop_nlink(&ndip
->i_inode
);
1697 } else if (S_ISDIR(old_mode
) && !S_ISDIR(new_mode
)) {
1698 inc_nlink(&ndip
->i_inode
);
1699 drop_nlink(&odip
->i_inode
);
1702 mark_inode_dirty(&ndip
->i_inode
);
1704 mark_inode_dirty(&odip
->i_inode
);
1707 gfs2_trans_end(sdp
);
1710 if (gfs2_holder_queued(ghs
+ x
))
1711 gfs2_glock_dq(ghs
+ x
);
1712 gfs2_holder_uninit(ghs
+ x
);
1715 if (gfs2_holder_initialized(&r_gh
))
1716 gfs2_glock_dq_uninit(&r_gh
);
1721 static int gfs2_rename2(struct inode
*odir
, struct dentry
*odentry
,
1722 struct inode
*ndir
, struct dentry
*ndentry
,
1725 flags
&= ~RENAME_NOREPLACE
;
1727 if (flags
& ~RENAME_EXCHANGE
)
1730 if (flags
& RENAME_EXCHANGE
)
1731 return gfs2_exchange(odir
, odentry
, ndir
, ndentry
, flags
);
1733 return gfs2_rename(odir
, odentry
, ndir
, ndentry
);
1737 * gfs2_get_link - Follow a symbolic link
1738 * @dentry: The dentry of the link
1739 * @inode: The inode of the link
1740 * @done: destructor for return value
1742 * This can handle symlinks of any size.
1744 * Returns: 0 on success or error code
1747 static const char *gfs2_get_link(struct dentry
*dentry
,
1748 struct inode
*inode
,
1749 struct delayed_call
*done
)
1751 struct gfs2_inode
*ip
= GFS2_I(inode
);
1752 struct gfs2_holder i_gh
;
1753 struct buffer_head
*dibh
;
1759 return ERR_PTR(-ECHILD
);
1761 gfs2_holder_init(ip
->i_gl
, LM_ST_SHARED
, 0, &i_gh
);
1762 error
= gfs2_glock_nq(&i_gh
);
1764 gfs2_holder_uninit(&i_gh
);
1765 return ERR_PTR(error
);
1768 size
= (unsigned int)i_size_read(&ip
->i_inode
);
1770 gfs2_consist_inode(ip
);
1771 buf
= ERR_PTR(-EIO
);
1775 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1777 buf
= ERR_PTR(error
);
1781 buf
= kzalloc(size
+ 1, GFP_NOFS
);
1783 buf
= ERR_PTR(-ENOMEM
);
1785 memcpy(buf
, dibh
->b_data
+ sizeof(struct gfs2_dinode
), size
);
1788 gfs2_glock_dq_uninit(&i_gh
);
1790 set_delayed_call(done
, kfree_link
, buf
);
1797 * @mask: The mask to be tested
1798 * @flags: Indicates whether this is an RCU path walk or not
1800 * This may be called from the VFS directly, or from within GFS2 with the
1801 * inode locked, so we look to see if the glock is already locked and only
1802 * lock the glock if its not already been done.
1807 int gfs2_permission(struct inode
*inode
, int mask
)
1809 struct gfs2_inode
*ip
;
1810 struct gfs2_holder i_gh
;
1813 gfs2_holder_mark_uninitialized(&i_gh
);
1815 if (gfs2_glock_is_locked_by_me(ip
->i_gl
) == NULL
) {
1816 if (mask
& MAY_NOT_BLOCK
)
1818 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &i_gh
);
1823 if ((mask
& MAY_WRITE
) && IS_IMMUTABLE(inode
))
1826 error
= generic_permission(inode
, mask
);
1827 if (gfs2_holder_initialized(&i_gh
))
1828 gfs2_glock_dq_uninit(&i_gh
);
1833 static int __gfs2_setattr_simple(struct inode
*inode
, struct iattr
*attr
)
1835 setattr_copy(inode
, attr
);
1836 mark_inode_dirty(inode
);
1841 * gfs2_setattr_simple -
1848 int gfs2_setattr_simple(struct inode
*inode
, struct iattr
*attr
)
1852 if (current
->journal_info
)
1853 return __gfs2_setattr_simple(inode
, attr
);
1855 error
= gfs2_trans_begin(GFS2_SB(inode
), RES_DINODE
, 0);
1859 error
= __gfs2_setattr_simple(inode
, attr
);
1860 gfs2_trans_end(GFS2_SB(inode
));
1864 static int setattr_chown(struct inode
*inode
, struct iattr
*attr
)
1866 struct gfs2_inode
*ip
= GFS2_I(inode
);
1867 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
1871 struct gfs2_alloc_parms ap
;
1873 ouid
= inode
->i_uid
;
1874 ogid
= inode
->i_gid
;
1875 nuid
= attr
->ia_uid
;
1876 ngid
= attr
->ia_gid
;
1878 if (!(attr
->ia_valid
& ATTR_UID
) || uid_eq(ouid
, nuid
))
1879 ouid
= nuid
= NO_UID_QUOTA_CHANGE
;
1880 if (!(attr
->ia_valid
& ATTR_GID
) || gid_eq(ogid
, ngid
))
1881 ogid
= ngid
= NO_GID_QUOTA_CHANGE
;
1883 error
= gfs2_rsqa_alloc(ip
);
1887 error
= gfs2_rindex_update(sdp
);
1891 error
= gfs2_quota_lock(ip
, nuid
, ngid
);
1895 ap
.target
= gfs2_get_inode_blocks(&ip
->i_inode
);
1897 if (!uid_eq(ouid
, NO_UID_QUOTA_CHANGE
) ||
1898 !gid_eq(ogid
, NO_GID_QUOTA_CHANGE
)) {
1899 error
= gfs2_quota_check(ip
, nuid
, ngid
, &ap
);
1904 error
= gfs2_trans_begin(sdp
, RES_DINODE
+ 2 * RES_QUOTA
, 0);
1908 error
= gfs2_setattr_simple(inode
, attr
);
1912 if (!uid_eq(ouid
, NO_UID_QUOTA_CHANGE
) ||
1913 !gid_eq(ogid
, NO_GID_QUOTA_CHANGE
)) {
1914 gfs2_quota_change(ip
, -(s64
)ap
.target
, ouid
, ogid
);
1915 gfs2_quota_change(ip
, ap
.target
, nuid
, ngid
);
1919 gfs2_trans_end(sdp
);
1921 gfs2_quota_unlock(ip
);
1927 * gfs2_setattr - Change attributes on an inode
1928 * @dentry: The dentry which is changing
1929 * @attr: The structure describing the change
1931 * The VFS layer wants to change one or more of an inodes attributes. Write
1932 * that change out to disk.
1937 static int gfs2_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1939 struct inode
*inode
= d_inode(dentry
);
1940 struct gfs2_inode
*ip
= GFS2_I(inode
);
1941 struct gfs2_holder i_gh
;
1944 error
= gfs2_rsqa_alloc(ip
);
1948 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1953 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
1956 error
= setattr_prepare(dentry
, attr
);
1960 if (attr
->ia_valid
& ATTR_SIZE
)
1961 error
= gfs2_setattr_size(inode
, attr
->ia_size
);
1962 else if (attr
->ia_valid
& (ATTR_UID
| ATTR_GID
))
1963 error
= setattr_chown(inode
, attr
);
1965 error
= gfs2_setattr_simple(inode
, attr
);
1966 if (!error
&& attr
->ia_valid
& ATTR_MODE
)
1967 error
= posix_acl_chmod(inode
, inode
->i_mode
);
1972 mark_inode_dirty(inode
);
1973 gfs2_glock_dq_uninit(&i_gh
);
1978 * gfs2_getattr - Read out an inode's attributes
1979 * @path: Object to query
1980 * @stat: The inode's stats
1981 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests
1982 * @flags: AT_STATX_xxx setting
1984 * This may be called from the VFS directly, or from within GFS2 with the
1985 * inode locked, so we look to see if the glock is already locked and only
1986 * lock the glock if its not already been done. Note that its the NFS
1987 * readdirplus operation which causes this to be called (from filldir)
1988 * with the glock already held.
1993 static int gfs2_getattr(const struct path
*path
, struct kstat
*stat
,
1994 u32 request_mask
, unsigned int flags
)
1996 struct inode
*inode
= d_inode(path
->dentry
);
1997 struct gfs2_inode
*ip
= GFS2_I(inode
);
1998 struct gfs2_holder gh
;
2002 gfs2_holder_mark_uninitialized(&gh
);
2003 if (gfs2_glock_is_locked_by_me(ip
->i_gl
) == NULL
) {
2004 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
2009 gfsflags
= ip
->i_diskflags
;
2010 if (gfsflags
& GFS2_DIF_APPENDONLY
)
2011 stat
->attributes
|= STATX_ATTR_APPEND
;
2012 if (gfsflags
& GFS2_DIF_IMMUTABLE
)
2013 stat
->attributes
|= STATX_ATTR_IMMUTABLE
;
2015 stat
->attributes_mask
|= (STATX_ATTR_APPEND
|
2016 STATX_ATTR_COMPRESSED
|
2017 STATX_ATTR_ENCRYPTED
|
2018 STATX_ATTR_IMMUTABLE
|
2021 generic_fillattr(inode
, stat
);
2023 if (gfs2_holder_initialized(&gh
))
2024 gfs2_glock_dq_uninit(&gh
);
2029 static int gfs2_fiemap(struct inode
*inode
, struct fiemap_extent_info
*fieinfo
,
2032 struct gfs2_inode
*ip
= GFS2_I(inode
);
2033 struct gfs2_holder gh
;
2036 inode_lock_shared(inode
);
2038 ret
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &gh
);
2042 ret
= iomap_fiemap(inode
, fieinfo
, start
, len
, &gfs2_iomap_ops
);
2044 gfs2_glock_dq_uninit(&gh
);
2047 inode_unlock_shared(inode
);
2051 loff_t
gfs2_seek_data(struct file
*file
, loff_t offset
)
2053 struct inode
*inode
= file
->f_mapping
->host
;
2054 struct gfs2_inode
*ip
= GFS2_I(inode
);
2055 struct gfs2_holder gh
;
2058 inode_lock_shared(inode
);
2059 ret
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &gh
);
2061 ret
= iomap_seek_data(inode
, offset
, &gfs2_iomap_ops
);
2062 gfs2_glock_dq_uninit(&gh
);
2063 inode_unlock_shared(inode
);
2067 return vfs_setpos(file
, ret
, inode
->i_sb
->s_maxbytes
);
2070 loff_t
gfs2_seek_hole(struct file
*file
, loff_t offset
)
2072 struct inode
*inode
= file
->f_mapping
->host
;
2073 struct gfs2_inode
*ip
= GFS2_I(inode
);
2074 struct gfs2_holder gh
;
2077 inode_lock_shared(inode
);
2078 ret
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &gh
);
2080 ret
= iomap_seek_hole(inode
, offset
, &gfs2_iomap_ops
);
2081 gfs2_glock_dq_uninit(&gh
);
2082 inode_unlock_shared(inode
);
2086 return vfs_setpos(file
, ret
, inode
->i_sb
->s_maxbytes
);
2089 const struct inode_operations gfs2_file_iops
= {
2090 .permission
= gfs2_permission
,
2091 .setattr
= gfs2_setattr
,
2092 .getattr
= gfs2_getattr
,
2093 .listxattr
= gfs2_listxattr
,
2094 .fiemap
= gfs2_fiemap
,
2095 .get_acl
= gfs2_get_acl
,
2096 .set_acl
= gfs2_set_acl
,
2099 const struct inode_operations gfs2_dir_iops
= {
2100 .create
= gfs2_create
,
2101 .lookup
= gfs2_lookup
,
2103 .unlink
= gfs2_unlink
,
2104 .symlink
= gfs2_symlink
,
2105 .mkdir
= gfs2_mkdir
,
2106 .rmdir
= gfs2_unlink
,
2107 .mknod
= gfs2_mknod
,
2108 .rename
= gfs2_rename2
,
2109 .permission
= gfs2_permission
,
2110 .setattr
= gfs2_setattr
,
2111 .getattr
= gfs2_getattr
,
2112 .listxattr
= gfs2_listxattr
,
2113 .fiemap
= gfs2_fiemap
,
2114 .get_acl
= gfs2_get_acl
,
2115 .set_acl
= gfs2_set_acl
,
2116 .atomic_open
= gfs2_atomic_open
,
2119 const struct inode_operations gfs2_symlink_iops
= {
2120 .get_link
= gfs2_get_link
,
2121 .permission
= gfs2_permission
,
2122 .setattr
= gfs2_setattr
,
2123 .getattr
= gfs2_getattr
,
2124 .listxattr
= gfs2_listxattr
,
2125 .fiemap
= gfs2_fiemap
,