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
);
140 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_inode_glops
, CREATE
, &ip
->i_gl
);
143 flush_delayed_work(&ip
->i_gl
->gl_work
);
145 error
= gfs2_glock_get(sdp
, no_addr
, &gfs2_iopen_glops
, CREATE
, &io_gl
);
149 if (type
== DT_UNKNOWN
|| blktype
!= GFS2_BLKST_FREE
) {
151 * The GL_SKIP flag indicates to skip reading the inode
152 * block. We read the inode with gfs2_inode_refresh
153 * after possibly checking the block type.
155 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
,
160 if (blktype
!= GFS2_BLKST_FREE
) {
161 error
= gfs2_check_blk_type(sdp
, no_addr
,
168 glock_set_object(ip
->i_gl
, ip
);
169 set_bit(GIF_INVALID
, &ip
->i_flags
);
170 error
= gfs2_glock_nq_init(io_gl
, LM_ST_SHARED
, GL_EXACT
, &ip
->i_iopen_gh
);
173 glock_set_object(ip
->i_iopen_gh
.gh_gl
, ip
);
174 gfs2_glock_put(io_gl
);
177 /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
178 inode
->i_atime
.tv_sec
= 1LL << (8 * sizeof(inode
->i_atime
.tv_sec
) - 1);
179 inode
->i_atime
.tv_nsec
= 0;
181 if (type
== DT_UNKNOWN
) {
182 /* Inode glock must be locked already */
183 error
= gfs2_inode_refresh(GFS2_I(inode
));
187 ip
->i_no_formal_ino
= no_formal_ino
;
188 inode
->i_mode
= DT2IF(type
);
193 unlock_new_inode(inode
);
196 if (gfs2_holder_initialized(&i_gh
))
197 gfs2_glock_dq_uninit(&i_gh
);
202 gfs2_glock_put(io_gl
);
203 if (gfs2_holder_initialized(&i_gh
))
204 gfs2_glock_dq_uninit(&i_gh
);
206 return ERR_PTR(error
);
209 struct inode
*gfs2_lookup_by_inum(struct gfs2_sbd
*sdp
, u64 no_addr
,
210 u64
*no_formal_ino
, unsigned int blktype
)
212 struct super_block
*sb
= sdp
->sd_vfs
;
216 inode
= gfs2_inode_lookup(sb
, DT_UNKNOWN
, no_addr
, 0, blktype
);
220 /* Two extra checks for NFS only */
223 if (GFS2_I(inode
)->i_no_formal_ino
!= *no_formal_ino
)
227 if (GFS2_I(inode
)->i_diskflags
& GFS2_DIF_SYSTEM
)
234 return ERR_PTR(error
);
238 struct inode
*gfs2_lookup_simple(struct inode
*dip
, const char *name
)
242 gfs2_str2qstr(&qstr
, name
);
243 inode
= gfs2_lookupi(dip
, &qstr
, 1);
244 /* gfs2_lookupi has inconsistent callers: vfs
245 * related routines expect NULL for no entry found,
246 * gfs2_lookup_simple callers expect ENOENT
247 * and do not check for NULL.
250 return ERR_PTR(-ENOENT
);
257 * gfs2_lookupi - Look up a filename in a directory and return its inode
258 * @d_gh: An initialized holder for the directory glock
259 * @name: The name of the inode to look for
260 * @is_root: If 1, ignore the caller's permissions
261 * @i_gh: An uninitialized holder for the new inode glock
263 * This can be called via the VFS filldir function when NFS is doing
264 * a readdirplus and the inode which its intending to stat isn't
265 * already in cache. In this case we must not take the directory glock
266 * again, since the readdir call will have already taken that lock.
271 struct inode
*gfs2_lookupi(struct inode
*dir
, const struct qstr
*name
,
274 struct super_block
*sb
= dir
->i_sb
;
275 struct gfs2_inode
*dip
= GFS2_I(dir
);
276 struct gfs2_holder d_gh
;
278 struct inode
*inode
= NULL
;
280 gfs2_holder_mark_uninitialized(&d_gh
);
281 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
282 return ERR_PTR(-ENAMETOOLONG
);
284 if ((name
->len
== 1 && memcmp(name
->name
, ".", 1) == 0) ||
285 (name
->len
== 2 && memcmp(name
->name
, "..", 2) == 0 &&
286 dir
== d_inode(sb
->s_root
))) {
291 if (gfs2_glock_is_locked_by_me(dip
->i_gl
) == NULL
) {
292 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_SHARED
, 0, &d_gh
);
294 return ERR_PTR(error
);
298 error
= gfs2_permission(dir
, MAY_EXEC
);
303 inode
= gfs2_dir_search(dir
, name
, false);
305 error
= PTR_ERR(inode
);
307 if (gfs2_holder_initialized(&d_gh
))
308 gfs2_glock_dq_uninit(&d_gh
);
309 if (error
== -ENOENT
)
311 return inode
? inode
: ERR_PTR(error
);
315 * create_ok - OK to create a new on-disk inode here?
316 * @dip: Directory in which dinode is to be created
317 * @name: Name of new dinode
323 static int create_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
328 error
= gfs2_permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
);
332 /* Don't create entries in an unlinked directory */
333 if (!dip
->i_inode
.i_nlink
)
336 if (dip
->i_entries
== (u32
)-1)
338 if (S_ISDIR(mode
) && dip
->i_inode
.i_nlink
== (u32
)-1)
344 static void munge_mode_uid_gid(const struct gfs2_inode
*dip
,
347 if (GFS2_SB(&dip
->i_inode
)->sd_args
.ar_suiddir
&&
348 (dip
->i_inode
.i_mode
& S_ISUID
) &&
349 !uid_eq(dip
->i_inode
.i_uid
, GLOBAL_ROOT_UID
)) {
350 if (S_ISDIR(inode
->i_mode
))
351 inode
->i_mode
|= S_ISUID
;
352 else if (!uid_eq(dip
->i_inode
.i_uid
, current_fsuid()))
353 inode
->i_mode
&= ~07111;
354 inode
->i_uid
= dip
->i_inode
.i_uid
;
356 inode
->i_uid
= current_fsuid();
358 if (dip
->i_inode
.i_mode
& S_ISGID
) {
359 if (S_ISDIR(inode
->i_mode
))
360 inode
->i_mode
|= S_ISGID
;
361 inode
->i_gid
= dip
->i_inode
.i_gid
;
363 inode
->i_gid
= current_fsgid();
366 static int alloc_dinode(struct gfs2_inode
*ip
, u32 flags
, unsigned *dblocks
)
368 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
369 struct gfs2_alloc_parms ap
= { .target
= *dblocks
, .aflags
= flags
, };
372 error
= gfs2_quota_lock_check(ip
, &ap
);
376 error
= gfs2_inplace_reserve(ip
, &ap
);
380 error
= gfs2_trans_begin(sdp
, (*dblocks
* RES_RG_BIT
) + RES_STATFS
+ RES_QUOTA
, 0);
384 error
= gfs2_alloc_blocks(ip
, &ip
->i_no_addr
, dblocks
, 1, &ip
->i_generation
);
385 ip
->i_no_formal_ino
= ip
->i_generation
;
386 ip
->i_inode
.i_ino
= ip
->i_no_addr
;
387 ip
->i_goal
= ip
->i_no_addr
;
392 gfs2_inplace_release(ip
);
394 gfs2_quota_unlock(ip
);
399 static void gfs2_init_dir(struct buffer_head
*dibh
,
400 const struct gfs2_inode
*parent
)
402 struct gfs2_dinode
*di
= (struct gfs2_dinode
*)dibh
->b_data
;
403 struct gfs2_dirent
*dent
= (struct gfs2_dirent
*)(di
+1);
405 gfs2_qstr2dirent(&gfs2_qdot
, GFS2_DIRENT_SIZE(gfs2_qdot
.len
), dent
);
406 dent
->de_inum
= di
->di_num
; /* already GFS2 endian */
407 dent
->de_type
= cpu_to_be16(DT_DIR
);
409 dent
= (struct gfs2_dirent
*)((char*)dent
+ GFS2_DIRENT_SIZE(1));
410 gfs2_qstr2dirent(&gfs2_qdotdot
, dibh
->b_size
- GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode
), dent
);
411 gfs2_inum_out(parent
, dent
);
412 dent
->de_type
= cpu_to_be16(DT_DIR
);
417 * gfs2_init_xattr - Initialise an xattr block for a new inode
418 * @ip: The inode in question
420 * This sets up an empty xattr block for a new inode, ready to
421 * take any ACLs, LSM xattrs, etc.
424 static void gfs2_init_xattr(struct gfs2_inode
*ip
)
426 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
427 struct buffer_head
*bh
;
428 struct gfs2_ea_header
*ea
;
430 bh
= gfs2_meta_new(ip
->i_gl
, ip
->i_eattr
);
431 gfs2_trans_add_meta(ip
->i_gl
, bh
);
432 gfs2_metatype_set(bh
, GFS2_METATYPE_EA
, GFS2_FORMAT_EA
);
433 gfs2_buffer_clear_tail(bh
, sizeof(struct gfs2_meta_header
));
435 ea
= GFS2_EA_BH2FIRST(bh
);
436 ea
->ea_rec_len
= cpu_to_be32(sdp
->sd_jbsize
);
437 ea
->ea_type
= GFS2_EATYPE_UNUSED
;
438 ea
->ea_flags
= GFS2_EAFLAG_LAST
;
444 * init_dinode - Fill in a new dinode structure
445 * @dip: The directory this inode is being created in
447 * @symname: The symlink destination (if a symlink)
448 * @bhp: The buffer head (returned to caller)
452 static void init_dinode(struct gfs2_inode
*dip
, struct gfs2_inode
*ip
,
455 struct gfs2_dinode
*di
;
456 struct buffer_head
*dibh
;
458 dibh
= gfs2_meta_new(ip
->i_gl
, ip
->i_no_addr
);
459 gfs2_trans_add_meta(ip
->i_gl
, dibh
);
460 di
= (struct gfs2_dinode
*)dibh
->b_data
;
461 gfs2_dinode_out(ip
, di
);
463 di
->di_major
= cpu_to_be32(MAJOR(ip
->i_inode
.i_rdev
));
464 di
->di_minor
= cpu_to_be32(MINOR(ip
->i_inode
.i_rdev
));
468 memset(&di
->__pad4
, 0, sizeof(di
->__pad4
));
469 memset(&di
->di_reserved
, 0, sizeof(di
->di_reserved
));
470 gfs2_buffer_clear_tail(dibh
, sizeof(struct gfs2_dinode
));
472 switch(ip
->i_inode
.i_mode
& S_IFMT
) {
474 gfs2_init_dir(dibh
, dip
);
477 memcpy(dibh
->b_data
+ sizeof(struct gfs2_dinode
), symname
, ip
->i_inode
.i_size
);
481 set_buffer_uptodate(dibh
);
486 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
487 * @dip: The directory we are linking into
488 * @da: The dir add information
489 * @nr_inodes: The number of inodes involved
491 * This calculate the number of blocks we need to reserve in a
492 * transaction to link @nr_inodes into a directory. In most cases
493 * @nr_inodes will be 2 (the directory plus the inode being linked in)
494 * but in case of rename, 4 may be required.
496 * Returns: Number of blocks
499 static unsigned gfs2_trans_da_blks(const struct gfs2_inode
*dip
,
500 const struct gfs2_diradd
*da
,
503 return da
->nr_blocks
+ gfs2_rg_blocks(dip
, da
->nr_blocks
) +
504 (nr_inodes
* RES_DINODE
) + RES_QUOTA
+ RES_STATFS
;
507 static int link_dinode(struct gfs2_inode
*dip
, const struct qstr
*name
,
508 struct gfs2_inode
*ip
, struct gfs2_diradd
*da
)
510 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
511 struct gfs2_alloc_parms ap
= { .target
= da
->nr_blocks
, };
515 error
= gfs2_quota_lock_check(dip
, &ap
);
517 goto fail_quota_locks
;
519 error
= gfs2_inplace_reserve(dip
, &ap
);
521 goto fail_quota_locks
;
523 error
= gfs2_trans_begin(sdp
, gfs2_trans_da_blks(dip
, da
, 2), 0);
527 error
= gfs2_trans_begin(sdp
, RES_LEAF
+ 2 * RES_DINODE
, 0);
529 goto fail_quota_locks
;
532 error
= gfs2_dir_add(&dip
->i_inode
, name
, ip
, da
);
536 gfs2_inplace_release(dip
);
538 gfs2_quota_unlock(dip
);
542 static int gfs2_initxattrs(struct inode
*inode
, const struct xattr
*xattr_array
,
545 const struct xattr
*xattr
;
548 for (xattr
= xattr_array
; xattr
->name
!= NULL
; xattr
++) {
549 err
= __gfs2_xattr_set(inode
, xattr
->name
, xattr
->value
,
551 GFS2_EATYPE_SECURITY
);
559 * gfs2_create_inode - Create a new inode
560 * @dir: The parent directory
561 * @dentry: The new dentry
562 * @file: If non-NULL, the file which is being opened
563 * @mode: The permissions on the new inode
564 * @dev: For device nodes, this is the device number
565 * @symname: For symlinks, this is the link destination
566 * @size: The initial size of the inode (ignored for directories)
568 * Returns: 0 on success, or error code
571 static int gfs2_create_inode(struct inode
*dir
, struct dentry
*dentry
,
573 umode_t mode
, dev_t dev
, const char *symname
,
574 unsigned int size
, int excl
)
576 const struct qstr
*name
= &dentry
->d_name
;
577 struct posix_acl
*default_acl
, *acl
;
578 struct gfs2_holder ghs
[2];
579 struct inode
*inode
= NULL
;
580 struct gfs2_inode
*dip
= GFS2_I(dir
), *ip
;
581 struct gfs2_sbd
*sdp
= GFS2_SB(&dip
->i_inode
);
582 struct gfs2_glock
*io_gl
= NULL
;
583 int error
, free_vfs_inode
= 1;
586 struct gfs2_diradd da
= { .bh
= NULL
, .save_loc
= 1, };
588 if (!name
->len
|| name
->len
> GFS2_FNAMESIZE
)
589 return -ENAMETOOLONG
;
591 error
= gfs2_qa_get(dip
);
595 error
= gfs2_rindex_update(sdp
);
599 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
602 gfs2_holder_mark_uninitialized(ghs
+ 1);
604 error
= create_ok(dip
, name
, mode
);
608 inode
= gfs2_dir_search(dir
, &dentry
->d_name
, !S_ISREG(mode
) || excl
);
609 error
= PTR_ERR(inode
);
610 if (!IS_ERR(inode
)) {
611 if (S_ISDIR(inode
->i_mode
)) {
613 inode
= ERR_PTR(-EISDIR
);
616 d_instantiate(dentry
, inode
);
619 if (S_ISREG(inode
->i_mode
))
620 error
= finish_open(file
, dentry
, gfs2_open_common
);
622 error
= finish_no_open(file
, NULL
);
624 gfs2_glock_dq_uninit(ghs
);
626 } else if (error
!= -ENOENT
) {
630 error
= gfs2_diradd_alloc_required(dir
, name
, &da
);
634 inode
= new_inode(sdp
->sd_vfs
);
639 error
= posix_acl_create(dir
, &mode
, &default_acl
, &acl
);
644 error
= gfs2_qa_get(ip
);
648 inode
->i_mode
= mode
;
649 set_nlink(inode
, S_ISDIR(mode
) ? 2 : 1);
651 inode
->i_size
= size
;
652 inode
->i_atime
= inode
->i_mtime
= inode
->i_ctime
= current_time(inode
);
653 munge_mode_uid_gid(dip
, inode
);
654 check_and_update_goal(dip
);
655 ip
->i_goal
= dip
->i_goal
;
661 ip
->i_no_addr
= 0; /* Temporarily zero until real addr is assigned */
663 switch(mode
& S_IFMT
) {
665 if ((dip
->i_diskflags
& GFS2_DIF_INHERIT_JDATA
) ||
666 gfs2_tune_get(sdp
, gt_new_files_jdata
))
667 ip
->i_diskflags
|= GFS2_DIF_JDATA
;
668 gfs2_set_aops(inode
);
671 ip
->i_diskflags
|= (dip
->i_diskflags
& GFS2_DIF_INHERIT_JDATA
);
672 ip
->i_diskflags
|= GFS2_DIF_JDATA
;
677 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
678 if (dip
->i_diskflags
& GFS2_DIF_SYSTEM
)
679 ip
->i_diskflags
|= GFS2_DIF_SYSTEM
;
681 gfs2_set_inode_flags(inode
);
683 if ((GFS2_I(d_inode(sdp
->sd_root_dir
)) == dip
) ||
684 (dip
->i_diskflags
& GFS2_DIF_TOPDIR
))
685 aflags
|= GFS2_AF_ORLOV
;
687 if (default_acl
|| acl
)
690 error
= alloc_dinode(ip
, aflags
, &blocks
);
692 goto fail_free_inode
;
694 gfs2_set_inode_blocks(inode
, blocks
);
696 error
= gfs2_glock_get(sdp
, ip
->i_no_addr
, &gfs2_inode_glops
, CREATE
, &ip
->i_gl
);
698 goto fail_free_inode
;
699 flush_delayed_work(&ip
->i_gl
->gl_work
);
700 glock_set_object(ip
->i_gl
, ip
);
702 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, GL_SKIP
, ghs
+ 1);
704 goto fail_free_inode
;
706 error
= gfs2_trans_begin(sdp
, blocks
, 0);
708 goto fail_free_inode
;
711 ip
->i_eattr
= ip
->i_no_addr
+ 1;
714 init_dinode(dip
, ip
, symname
);
717 error
= gfs2_glock_get(sdp
, ip
->i_no_addr
, &gfs2_iopen_glops
, CREATE
, &io_gl
);
719 goto fail_free_inode
;
721 BUG_ON(test_and_set_bit(GLF_INODE_CREATING
, &io_gl
->gl_flags
));
723 error
= gfs2_glock_nq_init(io_gl
, LM_ST_SHARED
, GL_EXACT
, &ip
->i_iopen_gh
);
727 glock_set_object(ip
->i_iopen_gh
.gh_gl
, ip
);
729 insert_inode_hash(inode
);
731 free_vfs_inode
= 0; /* After this point, the inode is no longer
732 considered free. Any failures need to undo
733 the gfs2 structures. */
735 error
= __gfs2_set_acl(inode
, default_acl
, ACL_TYPE_DEFAULT
);
738 posix_acl_release(default_acl
);
742 error
= __gfs2_set_acl(inode
, acl
, ACL_TYPE_ACCESS
);
745 posix_acl_release(acl
);
749 error
= security_inode_init_security(&ip
->i_inode
, &dip
->i_inode
, name
,
750 &gfs2_initxattrs
, NULL
);
754 error
= link_dinode(dip
, name
, ip
, &da
);
758 mark_inode_dirty(inode
);
759 d_instantiate(dentry
, inode
);
760 /* After instantiate, errors should result in evict which will destroy
761 * both inode and iopen glocks properly. */
763 file
->f_mode
|= FMODE_CREATED
;
764 error
= finish_open(file
, dentry
, gfs2_open_common
);
766 gfs2_glock_dq_uninit(ghs
);
767 gfs2_glock_dq_uninit(ghs
+ 1);
768 clear_bit(GLF_INODE_CREATING
, &io_gl
->gl_flags
);
769 gfs2_glock_put(io_gl
);
773 glock_clear_object(io_gl
, ip
);
774 gfs2_glock_dq_uninit(&ip
->i_iopen_gh
);
776 clear_bit(GLF_INODE_CREATING
, &io_gl
->gl_flags
);
777 gfs2_glock_put(io_gl
);
781 glock_clear_object(ip
->i_gl
, ip
);
782 gfs2_glock_put(ip
->i_gl
);
784 gfs2_rs_delete(ip
, NULL
);
787 posix_acl_release(default_acl
);
788 posix_acl_release(acl
);
790 gfs2_dir_no_add(&da
);
791 gfs2_glock_dq_uninit(ghs
);
792 if (!IS_ERR_OR_NULL(inode
)) {
795 mark_inode_dirty(inode
);
796 set_bit(free_vfs_inode
? GIF_FREE_VFS_INODE
: GIF_ALLOC_FAILED
,
797 &GFS2_I(inode
)->i_flags
);
800 if (gfs2_holder_initialized(ghs
+ 1))
801 gfs2_glock_dq_uninit(ghs
+ 1);
808 * gfs2_create - Create a file
809 * @dir: The directory in which to create the file
810 * @dentry: The dentry of the new file
811 * @mode: The mode of the new file
816 static int gfs2_create(struct inode
*dir
, struct dentry
*dentry
,
817 umode_t mode
, bool excl
)
819 return gfs2_create_inode(dir
, dentry
, NULL
, S_IFREG
| mode
, 0, NULL
, 0, excl
);
823 * __gfs2_lookup - Look up a filename in a directory and return its inode
824 * @dir: The directory inode
825 * @dentry: The dentry of the new inode
826 * @file: File to be opened
832 static struct dentry
*__gfs2_lookup(struct inode
*dir
, struct dentry
*dentry
,
837 struct gfs2_holder gh
;
838 struct gfs2_glock
*gl
;
841 inode
= gfs2_lookupi(dir
, &dentry
->d_name
, 0);
847 return ERR_CAST(inode
);
849 gl
= GFS2_I(inode
)->i_gl
;
850 error
= gfs2_glock_nq_init(gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
853 return ERR_PTR(error
);
856 d
= d_splice_alias(inode
, dentry
);
858 gfs2_glock_dq_uninit(&gh
);
861 if (file
&& S_ISREG(inode
->i_mode
))
862 error
= finish_open(file
, dentry
, gfs2_open_common
);
864 gfs2_glock_dq_uninit(&gh
);
867 return ERR_PTR(error
);
872 static struct dentry
*gfs2_lookup(struct inode
*dir
, struct dentry
*dentry
,
875 return __gfs2_lookup(dir
, dentry
, NULL
);
879 * gfs2_link - Link to a file
880 * @old_dentry: The inode to link
881 * @dir: Add link to this directory
882 * @dentry: The name of the link
884 * Link the inode in "old_dentry" into the directory "dir" with the
890 static int gfs2_link(struct dentry
*old_dentry
, struct inode
*dir
,
891 struct dentry
*dentry
)
893 struct gfs2_inode
*dip
= GFS2_I(dir
);
894 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
895 struct inode
*inode
= d_inode(old_dentry
);
896 struct gfs2_inode
*ip
= GFS2_I(inode
);
897 struct gfs2_holder ghs
[2];
898 struct buffer_head
*dibh
;
899 struct gfs2_diradd da
= { .bh
= NULL
, .save_loc
= 1, };
902 if (S_ISDIR(inode
->i_mode
))
905 error
= gfs2_qa_get(dip
);
909 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
910 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
912 error
= gfs2_glock_nq(ghs
); /* parent */
916 error
= gfs2_glock_nq(ghs
+ 1); /* child */
921 if (inode
->i_nlink
== 0)
924 error
= gfs2_permission(dir
, MAY_WRITE
| MAY_EXEC
);
928 error
= gfs2_dir_check(dir
, &dentry
->d_name
, NULL
);
939 if (!dip
->i_inode
.i_nlink
)
942 if (dip
->i_entries
== (u32
)-1)
945 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
948 if (!ip
->i_inode
.i_nlink
)
951 if (ip
->i_inode
.i_nlink
== (u32
)-1)
954 error
= gfs2_diradd_alloc_required(dir
, &dentry
->d_name
, &da
);
959 struct gfs2_alloc_parms ap
= { .target
= da
.nr_blocks
, };
960 error
= gfs2_quota_lock_check(dip
, &ap
);
964 error
= gfs2_inplace_reserve(dip
, &ap
);
968 error
= gfs2_trans_begin(sdp
, gfs2_trans_da_blks(dip
, &da
, 2), 0);
972 error
= gfs2_trans_begin(sdp
, 2 * RES_DINODE
+ RES_LEAF
, 0);
977 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
981 error
= gfs2_dir_add(dir
, &dentry
->d_name
, ip
, &da
);
985 gfs2_trans_add_meta(ip
->i_gl
, dibh
);
986 inc_nlink(&ip
->i_inode
);
987 ip
->i_inode
.i_ctime
= current_time(&ip
->i_inode
);
989 d_instantiate(dentry
, inode
);
990 mark_inode_dirty(inode
);
998 gfs2_inplace_release(dip
);
1001 gfs2_quota_unlock(dip
);
1003 gfs2_dir_no_add(&da
);
1004 gfs2_glock_dq(ghs
+ 1);
1009 gfs2_holder_uninit(ghs
);
1010 gfs2_holder_uninit(ghs
+ 1);
1015 * gfs2_unlink_ok - check to see that a inode is still in a directory
1016 * @dip: the directory
1017 * @name: the name of the file
1020 * Assumes that the lock on (at least) @dip is held.
1022 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1025 static int gfs2_unlink_ok(struct gfs2_inode
*dip
, const struct qstr
*name
,
1026 const struct gfs2_inode
*ip
)
1030 if (IS_IMMUTABLE(&ip
->i_inode
) || IS_APPEND(&ip
->i_inode
))
1033 if ((dip
->i_inode
.i_mode
& S_ISVTX
) &&
1034 !uid_eq(dip
->i_inode
.i_uid
, current_fsuid()) &&
1035 !uid_eq(ip
->i_inode
.i_uid
, current_fsuid()) && !capable(CAP_FOWNER
))
1038 if (IS_APPEND(&dip
->i_inode
))
1041 error
= gfs2_permission(&dip
->i_inode
, MAY_WRITE
| MAY_EXEC
);
1045 return gfs2_dir_check(&dip
->i_inode
, name
, ip
);
1049 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1050 * @dip: The parent directory
1051 * @name: The name of the entry in the parent directory
1052 * @inode: The inode to be removed
1054 * Called with all the locks and in a transaction. This will only be
1055 * called for a directory after it has been checked to ensure it is empty.
1057 * Returns: 0 on success, or an error
1060 static int gfs2_unlink_inode(struct gfs2_inode
*dip
,
1061 const struct dentry
*dentry
)
1063 struct inode
*inode
= d_inode(dentry
);
1064 struct gfs2_inode
*ip
= GFS2_I(inode
);
1067 error
= gfs2_dir_del(dip
, dentry
);
1072 inode
->i_ctime
= current_time(inode
);
1073 if (S_ISDIR(inode
->i_mode
))
1077 mark_inode_dirty(inode
);
1078 if (inode
->i_nlink
== 0)
1079 gfs2_unlink_di(inode
);
1085 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1086 * @dir: The inode of the directory containing the inode to unlink
1087 * @dentry: The file itself
1089 * This routine uses the type of the inode as a flag to figure out
1090 * whether this is an unlink or an rmdir.
1095 static int gfs2_unlink(struct inode
*dir
, struct dentry
*dentry
)
1097 struct gfs2_inode
*dip
= GFS2_I(dir
);
1098 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
1099 struct inode
*inode
= d_inode(dentry
);
1100 struct gfs2_inode
*ip
= GFS2_I(inode
);
1101 struct gfs2_holder ghs
[3];
1102 struct gfs2_rgrpd
*rgd
;
1105 error
= gfs2_rindex_update(sdp
);
1111 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
1112 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
1114 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_no_addr
, 1);
1118 gfs2_holder_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 2);
1121 error
= gfs2_glock_nq(ghs
); /* parent */
1125 error
= gfs2_glock_nq(ghs
+ 1); /* child */
1130 if (inode
->i_nlink
== 0)
1133 if (S_ISDIR(inode
->i_mode
)) {
1135 if (ip
->i_entries
> 2 || inode
->i_nlink
> 2)
1139 error
= gfs2_glock_nq(ghs
+ 2); /* rgrp */
1143 error
= gfs2_unlink_ok(dip
, &dentry
->d_name
, ip
);
1147 error
= gfs2_trans_begin(sdp
, 2*RES_DINODE
+ 3*RES_LEAF
+ RES_RG_BIT
, 0);
1151 error
= gfs2_unlink_inode(dip
, dentry
);
1152 gfs2_trans_end(sdp
);
1155 gfs2_glock_dq(ghs
+ 2);
1157 gfs2_glock_dq(ghs
+ 1);
1161 gfs2_holder_uninit(ghs
+ 2);
1163 gfs2_holder_uninit(ghs
+ 1);
1164 gfs2_holder_uninit(ghs
);
1169 * gfs2_symlink - Create a symlink
1170 * @dir: The directory to create the symlink in
1171 * @dentry: The dentry to put the symlink in
1172 * @symname: The thing which the link points to
1177 static int gfs2_symlink(struct inode
*dir
, struct dentry
*dentry
,
1178 const char *symname
)
1182 size
= strlen(symname
);
1183 if (size
>= gfs2_max_stuffed_size(GFS2_I(dir
)))
1184 return -ENAMETOOLONG
;
1186 return gfs2_create_inode(dir
, dentry
, NULL
, S_IFLNK
| S_IRWXUGO
, 0, symname
, size
, 0);
1190 * gfs2_mkdir - Make a directory
1191 * @dir: The parent directory of the new one
1192 * @dentry: The dentry of the new directory
1193 * @mode: The mode of the new directory
1198 static int gfs2_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1200 unsigned dsize
= gfs2_max_stuffed_size(GFS2_I(dir
));
1201 return gfs2_create_inode(dir
, dentry
, NULL
, S_IFDIR
| mode
, 0, NULL
, dsize
, 0);
1205 * gfs2_mknod - Make a special file
1206 * @dir: The directory in which the special file will reside
1207 * @dentry: The dentry of the special file
1208 * @mode: The mode of the special file
1209 * @dev: The device specification of the special file
1213 static int gfs2_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
1216 return gfs2_create_inode(dir
, dentry
, NULL
, mode
, dev
, NULL
, 0, 0);
1220 * gfs2_atomic_open - Atomically open a file
1221 * @dir: The directory
1222 * @dentry: The proposed new entry
1223 * @file: The proposed new struct file
1224 * @flags: open flags
1227 * Returns: error code or 0 for success
1230 static int gfs2_atomic_open(struct inode
*dir
, struct dentry
*dentry
,
1231 struct file
*file
, unsigned flags
,
1235 bool excl
= !!(flags
& O_EXCL
);
1237 if (!d_in_lookup(dentry
))
1240 d
= __gfs2_lookup(dir
, dentry
, file
);
1245 if (d_really_is_positive(dentry
)) {
1246 if (!(file
->f_mode
& FMODE_OPENED
))
1247 return finish_no_open(file
, d
);
1249 return excl
&& (flags
& O_CREAT
) ? -EEXIST
: 0;
1255 if (!(flags
& O_CREAT
))
1258 return gfs2_create_inode(dir
, dentry
, file
, S_IFREG
| mode
, 0, NULL
, 0, excl
);
1262 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1266 * Follow @to back to the root and make sure we don't encounter @this
1267 * Assumes we already hold the rename lock.
1272 static int gfs2_ok_to_move(struct gfs2_inode
*this, struct gfs2_inode
*to
)
1274 struct inode
*dir
= &to
->i_inode
;
1275 struct super_block
*sb
= dir
->i_sb
;
1282 if (dir
== &this->i_inode
) {
1286 if (dir
== d_inode(sb
->s_root
)) {
1291 tmp
= gfs2_lookupi(dir
, &gfs2_qdotdot
, 1);
1297 error
= PTR_ERR(tmp
);
1311 * update_moved_ino - Update an inode that's being moved
1312 * @ip: The inode being moved
1313 * @ndip: The parent directory of the new filename
1314 * @dir_rename: True of ip is a directory
1319 static int update_moved_ino(struct gfs2_inode
*ip
, struct gfs2_inode
*ndip
,
1323 return gfs2_dir_mvino(ip
, &gfs2_qdotdot
, ndip
, DT_DIR
);
1325 ip
->i_inode
.i_ctime
= current_time(&ip
->i_inode
);
1326 mark_inode_dirty_sync(&ip
->i_inode
);
1332 * gfs2_rename - Rename a file
1333 * @odir: Parent directory of old file name
1334 * @odentry: The old dentry of the file
1335 * @ndir: Parent directory of new file name
1336 * @ndentry: The new dentry of the file
1341 static int gfs2_rename(struct inode
*odir
, struct dentry
*odentry
,
1342 struct inode
*ndir
, struct dentry
*ndentry
)
1344 struct gfs2_inode
*odip
= GFS2_I(odir
);
1345 struct gfs2_inode
*ndip
= GFS2_I(ndir
);
1346 struct gfs2_inode
*ip
= GFS2_I(d_inode(odentry
));
1347 struct gfs2_inode
*nip
= NULL
;
1348 struct gfs2_sbd
*sdp
= GFS2_SB(odir
);
1349 struct gfs2_holder ghs
[4], r_gh
, rd_gh
;
1350 struct gfs2_rgrpd
*nrgd
;
1351 unsigned int num_gh
;
1353 struct gfs2_diradd da
= { .nr_blocks
= 0, .save_loc
= 0, };
1357 gfs2_holder_mark_uninitialized(&r_gh
);
1358 gfs2_holder_mark_uninitialized(&rd_gh
);
1359 if (d_really_is_positive(ndentry
)) {
1360 nip
= GFS2_I(d_inode(ndentry
));
1365 error
= gfs2_rindex_update(sdp
);
1369 error
= gfs2_qa_get(ndip
);
1374 error
= gfs2_glock_nq_init(sdp
->sd_rename_gl
, LM_ST_EXCLUSIVE
,
1379 if (S_ISDIR(ip
->i_inode
.i_mode
)) {
1381 /* don't move a directory into its subdir */
1382 error
= gfs2_ok_to_move(ip
, ndip
);
1389 gfs2_holder_init(odip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
, ghs
);
1391 gfs2_holder_init(ndip
->i_gl
, LM_ST_EXCLUSIVE
,GL_ASYNC
,
1395 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
, ghs
+ num_gh
);
1399 gfs2_holder_init(nip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
,
1404 for (x
= 0; x
< num_gh
; x
++) {
1405 error
= gfs2_glock_nq(ghs
+ x
);
1409 error
= gfs2_glock_async_wait(num_gh
, ghs
);
1414 /* Grab the resource group glock for unlink flag twiddling.
1415 * This is the case where the target dinode already exists
1416 * so we unlink before doing the rename.
1418 nrgd
= gfs2_blk2rgrpd(sdp
, nip
->i_no_addr
, 1);
1423 error
= gfs2_glock_nq_init(nrgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0,
1430 if (ip
->i_inode
.i_nlink
== 0)
1433 /* Check out the old directory */
1435 error
= gfs2_unlink_ok(odip
, &odentry
->d_name
, ip
);
1439 /* Check out the new directory */
1442 error
= gfs2_unlink_ok(ndip
, &ndentry
->d_name
, nip
);
1446 if (nip
->i_inode
.i_nlink
== 0) {
1451 if (S_ISDIR(nip
->i_inode
.i_mode
)) {
1452 if (nip
->i_entries
< 2) {
1453 gfs2_consist_inode(nip
);
1457 if (nip
->i_entries
> 2) {
1463 error
= gfs2_permission(ndir
, MAY_WRITE
| MAY_EXEC
);
1467 error
= gfs2_dir_check(ndir
, &ndentry
->d_name
, NULL
);
1479 if (!ndip
->i_inode
.i_nlink
) {
1483 if (ndip
->i_entries
== (u32
)-1) {
1487 if (S_ISDIR(ip
->i_inode
.i_mode
) &&
1488 ndip
->i_inode
.i_nlink
== (u32
)-1) {
1495 /* Check out the dir to be renamed */
1498 error
= gfs2_permission(d_inode(odentry
), MAY_WRITE
);
1504 error
= gfs2_diradd_alloc_required(ndir
, &ndentry
->d_name
, &da
);
1510 struct gfs2_alloc_parms ap
= { .target
= da
.nr_blocks
, };
1511 error
= gfs2_quota_lock_check(ndip
, &ap
);
1515 error
= gfs2_inplace_reserve(ndip
, &ap
);
1519 error
= gfs2_trans_begin(sdp
, gfs2_trans_da_blks(ndip
, &da
, 4) +
1520 4 * RES_LEAF
+ 4, 0);
1524 error
= gfs2_trans_begin(sdp
, 4 * RES_DINODE
+
1525 5 * RES_LEAF
+ 4, 0);
1530 /* Remove the target file, if it exists */
1533 error
= gfs2_unlink_inode(ndip
, ndentry
);
1535 error
= update_moved_ino(ip
, ndip
, dir_rename
);
1539 error
= gfs2_dir_del(odip
, odentry
);
1543 error
= gfs2_dir_add(ndir
, &ndentry
->d_name
, ip
, &da
);
1548 gfs2_trans_end(sdp
);
1551 gfs2_inplace_release(ndip
);
1554 gfs2_quota_unlock(ndip
);
1556 gfs2_dir_no_add(&da
);
1557 if (gfs2_holder_initialized(&rd_gh
))
1558 gfs2_glock_dq_uninit(&rd_gh
);
1561 if (gfs2_holder_queued(ghs
+ x
))
1562 gfs2_glock_dq(ghs
+ x
);
1563 gfs2_holder_uninit(ghs
+ x
);
1566 if (gfs2_holder_initialized(&r_gh
))
1567 gfs2_glock_dq_uninit(&r_gh
);
1574 * gfs2_exchange - exchange two files
1575 * @odir: Parent directory of old file name
1576 * @odentry: The old dentry of the file
1577 * @ndir: Parent directory of new file name
1578 * @ndentry: The new dentry of the file
1579 * @flags: The rename flags
1584 static int gfs2_exchange(struct inode
*odir
, struct dentry
*odentry
,
1585 struct inode
*ndir
, struct dentry
*ndentry
,
1588 struct gfs2_inode
*odip
= GFS2_I(odir
);
1589 struct gfs2_inode
*ndip
= GFS2_I(ndir
);
1590 struct gfs2_inode
*oip
= GFS2_I(odentry
->d_inode
);
1591 struct gfs2_inode
*nip
= GFS2_I(ndentry
->d_inode
);
1592 struct gfs2_sbd
*sdp
= GFS2_SB(odir
);
1593 struct gfs2_holder ghs
[4], r_gh
;
1594 unsigned int num_gh
;
1596 umode_t old_mode
= oip
->i_inode
.i_mode
;
1597 umode_t new_mode
= nip
->i_inode
.i_mode
;
1600 gfs2_holder_mark_uninitialized(&r_gh
);
1601 error
= gfs2_rindex_update(sdp
);
1606 error
= gfs2_glock_nq_init(sdp
->sd_rename_gl
, LM_ST_EXCLUSIVE
,
1611 if (S_ISDIR(old_mode
)) {
1612 /* don't move a directory into its subdir */
1613 error
= gfs2_ok_to_move(oip
, ndip
);
1618 if (S_ISDIR(new_mode
)) {
1619 /* don't move a directory into its subdir */
1620 error
= gfs2_ok_to_move(nip
, odip
);
1627 gfs2_holder_init(odip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
, ghs
);
1629 gfs2_holder_init(ndip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
,
1633 gfs2_holder_init(oip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
, ghs
+ num_gh
);
1636 gfs2_holder_init(nip
->i_gl
, LM_ST_EXCLUSIVE
, GL_ASYNC
, ghs
+ num_gh
);
1639 for (x
= 0; x
< num_gh
; x
++) {
1640 error
= gfs2_glock_nq(ghs
+ x
);
1645 error
= gfs2_glock_async_wait(num_gh
, ghs
);
1650 if (oip
->i_inode
.i_nlink
== 0 || nip
->i_inode
.i_nlink
== 0)
1653 error
= gfs2_unlink_ok(odip
, &odentry
->d_name
, oip
);
1656 error
= gfs2_unlink_ok(ndip
, &ndentry
->d_name
, nip
);
1660 if (S_ISDIR(old_mode
)) {
1661 error
= gfs2_permission(odentry
->d_inode
, MAY_WRITE
);
1665 if (S_ISDIR(new_mode
)) {
1666 error
= gfs2_permission(ndentry
->d_inode
, MAY_WRITE
);
1670 error
= gfs2_trans_begin(sdp
, 4 * RES_DINODE
+ 4 * RES_LEAF
, 0);
1674 error
= update_moved_ino(oip
, ndip
, S_ISDIR(old_mode
));
1678 error
= update_moved_ino(nip
, odip
, S_ISDIR(new_mode
));
1682 error
= gfs2_dir_mvino(ndip
, &ndentry
->d_name
, oip
,
1687 error
= gfs2_dir_mvino(odip
, &odentry
->d_name
, nip
,
1693 if (S_ISDIR(new_mode
) && !S_ISDIR(old_mode
)) {
1694 inc_nlink(&odip
->i_inode
);
1695 drop_nlink(&ndip
->i_inode
);
1696 } else if (S_ISDIR(old_mode
) && !S_ISDIR(new_mode
)) {
1697 inc_nlink(&ndip
->i_inode
);
1698 drop_nlink(&odip
->i_inode
);
1701 mark_inode_dirty(&ndip
->i_inode
);
1703 mark_inode_dirty(&odip
->i_inode
);
1706 gfs2_trans_end(sdp
);
1709 if (gfs2_holder_queued(ghs
+ x
))
1710 gfs2_glock_dq(ghs
+ x
);
1711 gfs2_holder_uninit(ghs
+ x
);
1714 if (gfs2_holder_initialized(&r_gh
))
1715 gfs2_glock_dq_uninit(&r_gh
);
1720 static int gfs2_rename2(struct inode
*odir
, struct dentry
*odentry
,
1721 struct inode
*ndir
, struct dentry
*ndentry
,
1724 flags
&= ~RENAME_NOREPLACE
;
1726 if (flags
& ~RENAME_EXCHANGE
)
1729 if (flags
& RENAME_EXCHANGE
)
1730 return gfs2_exchange(odir
, odentry
, ndir
, ndentry
, flags
);
1732 return gfs2_rename(odir
, odentry
, ndir
, ndentry
);
1736 * gfs2_get_link - Follow a symbolic link
1737 * @dentry: The dentry of the link
1738 * @inode: The inode of the link
1739 * @done: destructor for return value
1741 * This can handle symlinks of any size.
1743 * Returns: 0 on success or error code
1746 static const char *gfs2_get_link(struct dentry
*dentry
,
1747 struct inode
*inode
,
1748 struct delayed_call
*done
)
1750 struct gfs2_inode
*ip
= GFS2_I(inode
);
1751 struct gfs2_holder i_gh
;
1752 struct buffer_head
*dibh
;
1758 return ERR_PTR(-ECHILD
);
1760 gfs2_holder_init(ip
->i_gl
, LM_ST_SHARED
, 0, &i_gh
);
1761 error
= gfs2_glock_nq(&i_gh
);
1763 gfs2_holder_uninit(&i_gh
);
1764 return ERR_PTR(error
);
1767 size
= (unsigned int)i_size_read(&ip
->i_inode
);
1769 gfs2_consist_inode(ip
);
1770 buf
= ERR_PTR(-EIO
);
1774 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1776 buf
= ERR_PTR(error
);
1780 buf
= kzalloc(size
+ 1, GFP_NOFS
);
1782 buf
= ERR_PTR(-ENOMEM
);
1784 memcpy(buf
, dibh
->b_data
+ sizeof(struct gfs2_dinode
), size
);
1787 gfs2_glock_dq_uninit(&i_gh
);
1789 set_delayed_call(done
, kfree_link
, buf
);
1796 * @mask: The mask to be tested
1797 * @flags: Indicates whether this is an RCU path walk or not
1799 * This may be called from the VFS directly, or from within GFS2 with the
1800 * inode locked, so we look to see if the glock is already locked and only
1801 * lock the glock if its not already been done.
1806 int gfs2_permission(struct inode
*inode
, int mask
)
1808 struct gfs2_inode
*ip
;
1809 struct gfs2_holder i_gh
;
1812 gfs2_holder_mark_uninitialized(&i_gh
);
1814 if (gfs2_glock_is_locked_by_me(ip
->i_gl
) == NULL
) {
1815 if (mask
& MAY_NOT_BLOCK
)
1817 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &i_gh
);
1822 if ((mask
& MAY_WRITE
) && IS_IMMUTABLE(inode
))
1825 error
= generic_permission(inode
, mask
);
1826 if (gfs2_holder_initialized(&i_gh
))
1827 gfs2_glock_dq_uninit(&i_gh
);
1832 static int __gfs2_setattr_simple(struct inode
*inode
, struct iattr
*attr
)
1834 setattr_copy(inode
, attr
);
1835 mark_inode_dirty(inode
);
1840 * gfs2_setattr_simple -
1847 int gfs2_setattr_simple(struct inode
*inode
, struct iattr
*attr
)
1851 if (current
->journal_info
)
1852 return __gfs2_setattr_simple(inode
, attr
);
1854 error
= gfs2_trans_begin(GFS2_SB(inode
), RES_DINODE
, 0);
1858 error
= __gfs2_setattr_simple(inode
, attr
);
1859 gfs2_trans_end(GFS2_SB(inode
));
1863 static int setattr_chown(struct inode
*inode
, struct iattr
*attr
)
1865 struct gfs2_inode
*ip
= GFS2_I(inode
);
1866 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
1870 struct gfs2_alloc_parms ap
;
1872 ouid
= inode
->i_uid
;
1873 ogid
= inode
->i_gid
;
1874 nuid
= attr
->ia_uid
;
1875 ngid
= attr
->ia_gid
;
1877 if (!(attr
->ia_valid
& ATTR_UID
) || uid_eq(ouid
, nuid
))
1878 ouid
= nuid
= NO_UID_QUOTA_CHANGE
;
1879 if (!(attr
->ia_valid
& ATTR_GID
) || gid_eq(ogid
, ngid
))
1880 ogid
= ngid
= NO_GID_QUOTA_CHANGE
;
1881 error
= gfs2_qa_get(ip
);
1885 error
= gfs2_rindex_update(sdp
);
1889 error
= gfs2_quota_lock(ip
, nuid
, ngid
);
1893 ap
.target
= gfs2_get_inode_blocks(&ip
->i_inode
);
1895 if (!uid_eq(ouid
, NO_UID_QUOTA_CHANGE
) ||
1896 !gid_eq(ogid
, NO_GID_QUOTA_CHANGE
)) {
1897 error
= gfs2_quota_check(ip
, nuid
, ngid
, &ap
);
1902 error
= gfs2_trans_begin(sdp
, RES_DINODE
+ 2 * RES_QUOTA
, 0);
1906 error
= gfs2_setattr_simple(inode
, attr
);
1910 if (!uid_eq(ouid
, NO_UID_QUOTA_CHANGE
) ||
1911 !gid_eq(ogid
, NO_GID_QUOTA_CHANGE
)) {
1912 gfs2_quota_change(ip
, -(s64
)ap
.target
, ouid
, ogid
);
1913 gfs2_quota_change(ip
, ap
.target
, nuid
, ngid
);
1917 gfs2_trans_end(sdp
);
1919 gfs2_quota_unlock(ip
);
1926 * gfs2_setattr - Change attributes on an inode
1927 * @dentry: The dentry which is changing
1928 * @attr: The structure describing the change
1930 * The VFS layer wants to change one or more of an inodes attributes. Write
1931 * that change out to disk.
1936 static int gfs2_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1938 struct inode
*inode
= d_inode(dentry
);
1939 struct gfs2_inode
*ip
= GFS2_I(inode
);
1940 struct gfs2_holder i_gh
;
1943 error
= gfs2_qa_get(ip
);
1947 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1952 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
1955 error
= setattr_prepare(dentry
, attr
);
1959 if (attr
->ia_valid
& ATTR_SIZE
)
1960 error
= gfs2_setattr_size(inode
, attr
->ia_size
);
1961 else if (attr
->ia_valid
& (ATTR_UID
| ATTR_GID
))
1962 error
= setattr_chown(inode
, attr
);
1964 error
= gfs2_setattr_simple(inode
, attr
);
1965 if (!error
&& attr
->ia_valid
& ATTR_MODE
)
1966 error
= posix_acl_chmod(inode
, inode
->i_mode
);
1971 mark_inode_dirty(inode
);
1972 gfs2_glock_dq_uninit(&i_gh
);
1979 * gfs2_getattr - Read out an inode's attributes
1980 * @path: Object to query
1981 * @stat: The inode's stats
1982 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests
1983 * @flags: AT_STATX_xxx setting
1985 * This may be called from the VFS directly, or from within GFS2 with the
1986 * inode locked, so we look to see if the glock is already locked and only
1987 * lock the glock if its not already been done. Note that its the NFS
1988 * readdirplus operation which causes this to be called (from filldir)
1989 * with the glock already held.
1994 static int gfs2_getattr(const struct path
*path
, struct kstat
*stat
,
1995 u32 request_mask
, unsigned int flags
)
1997 struct inode
*inode
= d_inode(path
->dentry
);
1998 struct gfs2_inode
*ip
= GFS2_I(inode
);
1999 struct gfs2_holder gh
;
2003 gfs2_holder_mark_uninitialized(&gh
);
2004 if (gfs2_glock_is_locked_by_me(ip
->i_gl
) == NULL
) {
2005 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
2010 gfsflags
= ip
->i_diskflags
;
2011 if (gfsflags
& GFS2_DIF_APPENDONLY
)
2012 stat
->attributes
|= STATX_ATTR_APPEND
;
2013 if (gfsflags
& GFS2_DIF_IMMUTABLE
)
2014 stat
->attributes
|= STATX_ATTR_IMMUTABLE
;
2016 stat
->attributes_mask
|= (STATX_ATTR_APPEND
|
2017 STATX_ATTR_COMPRESSED
|
2018 STATX_ATTR_ENCRYPTED
|
2019 STATX_ATTR_IMMUTABLE
|
2022 generic_fillattr(inode
, stat
);
2024 if (gfs2_holder_initialized(&gh
))
2025 gfs2_glock_dq_uninit(&gh
);
2030 static int gfs2_fiemap(struct inode
*inode
, struct fiemap_extent_info
*fieinfo
,
2033 struct gfs2_inode
*ip
= GFS2_I(inode
);
2034 struct gfs2_holder gh
;
2037 inode_lock_shared(inode
);
2039 ret
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &gh
);
2043 ret
= iomap_fiemap(inode
, fieinfo
, start
, len
, &gfs2_iomap_ops
);
2045 gfs2_glock_dq_uninit(&gh
);
2048 inode_unlock_shared(inode
);
2052 loff_t
gfs2_seek_data(struct file
*file
, loff_t offset
)
2054 struct inode
*inode
= file
->f_mapping
->host
;
2055 struct gfs2_inode
*ip
= GFS2_I(inode
);
2056 struct gfs2_holder gh
;
2059 inode_lock_shared(inode
);
2060 ret
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &gh
);
2062 ret
= iomap_seek_data(inode
, offset
, &gfs2_iomap_ops
);
2063 gfs2_glock_dq_uninit(&gh
);
2064 inode_unlock_shared(inode
);
2068 return vfs_setpos(file
, ret
, inode
->i_sb
->s_maxbytes
);
2071 loff_t
gfs2_seek_hole(struct file
*file
, loff_t offset
)
2073 struct inode
*inode
= file
->f_mapping
->host
;
2074 struct gfs2_inode
*ip
= GFS2_I(inode
);
2075 struct gfs2_holder gh
;
2078 inode_lock_shared(inode
);
2079 ret
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &gh
);
2081 ret
= iomap_seek_hole(inode
, offset
, &gfs2_iomap_ops
);
2082 gfs2_glock_dq_uninit(&gh
);
2083 inode_unlock_shared(inode
);
2087 return vfs_setpos(file
, ret
, inode
->i_sb
->s_maxbytes
);
2090 const struct inode_operations gfs2_file_iops
= {
2091 .permission
= gfs2_permission
,
2092 .setattr
= gfs2_setattr
,
2093 .getattr
= gfs2_getattr
,
2094 .listxattr
= gfs2_listxattr
,
2095 .fiemap
= gfs2_fiemap
,
2096 .get_acl
= gfs2_get_acl
,
2097 .set_acl
= gfs2_set_acl
,
2100 const struct inode_operations gfs2_dir_iops
= {
2101 .create
= gfs2_create
,
2102 .lookup
= gfs2_lookup
,
2104 .unlink
= gfs2_unlink
,
2105 .symlink
= gfs2_symlink
,
2106 .mkdir
= gfs2_mkdir
,
2107 .rmdir
= gfs2_unlink
,
2108 .mknod
= gfs2_mknod
,
2109 .rename
= gfs2_rename2
,
2110 .permission
= gfs2_permission
,
2111 .setattr
= gfs2_setattr
,
2112 .getattr
= gfs2_getattr
,
2113 .listxattr
= gfs2_listxattr
,
2114 .fiemap
= gfs2_fiemap
,
2115 .get_acl
= gfs2_get_acl
,
2116 .set_acl
= gfs2_set_acl
,
2117 .atomic_open
= gfs2_atomic_open
,
2120 const struct inode_operations gfs2_symlink_iops
= {
2121 .get_link
= gfs2_get_link
,
2122 .permission
= gfs2_permission
,
2123 .setattr
= gfs2_setattr
,
2124 .getattr
= gfs2_getattr
,
2125 .listxattr
= gfs2_listxattr
,
2126 .fiemap
= gfs2_fiemap
,