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 gfs2_set_inode_blocks(inode, 1);
660 munge_mode_uid_gid(dip, inode);
661 check_and_update_goal(dip);
662 ip->i_goal = dip->i_goal;
668 ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */
670 switch(mode & S_IFMT) {
672 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
673 gfs2_tune_get(sdp, gt_new_files_jdata))
674 ip->i_diskflags |= GFS2_DIF_JDATA;
675 gfs2_set_aops(inode);
678 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
679 ip->i_diskflags |= GFS2_DIF_JDATA;
684 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
685 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
686 ip->i_diskflags |= GFS2_DIF_SYSTEM;
688 gfs2_set_inode_flags(inode);
690 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
691 (dip->i_diskflags & GFS2_DIF_TOPDIR))
692 aflags |= GFS2_AF_ORLOV;
694 if (default_acl || acl)
697 error = alloc_dinode(ip, aflags, &blocks);
699 goto fail_free_inode;
701 gfs2_set_inode_blocks(inode, blocks);
703 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
705 goto fail_free_inode;
706 flush_delayed_work(&ip->i_gl->gl_work);
707 glock_set_object(ip->i_gl, ip);
709 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
711 goto fail_free_inode;
713 error = gfs2_trans_begin(sdp, blocks, 0);
715 goto fail_free_inode;
718 ip->i_eattr = ip->i_no_addr + 1;
721 init_dinode(dip, ip, symname);
724 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
726 goto fail_free_inode;
728 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
730 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
734 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
736 insert_inode_hash(inode);
738 free_vfs_inode = 0; /* After this point, the inode is no longer
739 considered free. Any failures need to undo
740 the gfs2 structures. */
742 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
745 posix_acl_release(default_acl);
749 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
752 posix_acl_release(acl);
756 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
757 &gfs2_initxattrs, NULL);
761 error = link_dinode(dip, name, ip, &da);
765 mark_inode_dirty(inode);
766 d_instantiate(dentry, inode);
767 /* After instantiate, errors should result in evict which will destroy
768 * both inode and iopen glocks properly. */
770 file->f_mode |= FMODE_CREATED;
771 error = finish_open(file, dentry, gfs2_open_common);
773 gfs2_glock_dq_uninit(ghs);
774 gfs2_glock_dq_uninit(ghs + 1);
775 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
776 gfs2_glock_put(io_gl);
780 glock_clear_object(io_gl, ip);
781 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
783 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
784 gfs2_glock_put(io_gl);
787 glock_clear_object(ip->i_gl, ip);
788 gfs2_glock_put(ip->i_gl);
790 gfs2_rsqa_delete(ip, NULL);
792 posix_acl_release(default_acl);
793 posix_acl_release(acl);
795 gfs2_dir_no_add(&da);
796 gfs2_glock_dq_uninit(ghs);
797 if (!IS_ERR_OR_NULL(inode)) {
800 mark_inode_dirty(inode);
801 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
802 &GFS2_I(inode)->i_flags);
805 if (gfs2_holder_initialized(ghs + 1))
806 gfs2_glock_dq_uninit(ghs + 1);
812 * gfs2_create - Create a file
813 * @dir: The directory in which to create the file
814 * @dentry: The dentry of the new file
815 * @mode: The mode of the new file
820 static int gfs2_create(struct inode *dir, struct dentry *dentry,
821 umode_t mode, bool excl)
823 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl);
827 * __gfs2_lookup - Look up a filename in a directory and return its inode
828 * @dir: The directory inode
829 * @dentry: The dentry of the new inode
830 * @file: File to be opened
836 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
841 struct gfs2_holder gh;
842 struct gfs2_glock *gl;
845 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
851 return ERR_CAST(inode);
853 gl = GFS2_I(inode)->i_gl;
854 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
857 return ERR_PTR(error);
860 d = d_splice_alias(inode, dentry);
862 gfs2_glock_dq_uninit(&gh);
865 if (file && S_ISREG(inode->i_mode))
866 error = finish_open(file, dentry, gfs2_open_common);
868 gfs2_glock_dq_uninit(&gh);
871 return ERR_PTR(error);
876 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
879 return __gfs2_lookup(dir, dentry, NULL);
883 * gfs2_link - Link to a file
884 * @old_dentry: The inode to link
885 * @dir: Add link to this directory
886 * @dentry: The name of the link
888 * Link the inode in "old_dentry" into the directory "dir" with the
894 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
895 struct dentry *dentry)
897 struct gfs2_inode *dip = GFS2_I(dir);
898 struct gfs2_sbd *sdp = GFS2_SB(dir);
899 struct inode *inode = d_inode(old_dentry);
900 struct gfs2_inode *ip = GFS2_I(inode);
901 struct gfs2_holder ghs[2];
902 struct buffer_head *dibh;
903 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
906 if (S_ISDIR(inode->i_mode))
909 error = gfs2_rsqa_alloc(dip);
913 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
914 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
916 error = gfs2_glock_nq(ghs); /* parent */
920 error = gfs2_glock_nq(ghs + 1); /* child */
925 if (inode->i_nlink == 0)
928 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
932 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
943 if (!dip->i_inode.i_nlink)
946 if (dip->i_entries == (u32)-1)
949 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
952 if (!ip->i_inode.i_nlink)
955 if (ip->i_inode.i_nlink == (u32)-1)
958 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
963 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
964 error = gfs2_quota_lock_check(dip, &ap);
968 error = gfs2_inplace_reserve(dip, &ap);
972 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
976 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
981 error = gfs2_meta_inode_buffer(ip, &dibh);
985 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
989 gfs2_trans_add_meta(ip->i_gl, dibh);
990 inc_nlink(&ip->i_inode);
991 ip->i_inode.i_ctime = current_time(&ip->i_inode);
993 d_instantiate(dentry, inode);
994 mark_inode_dirty(inode);
1002 gfs2_inplace_release(dip);
1005 gfs2_quota_unlock(dip);
1007 gfs2_dir_no_add(&da);
1008 gfs2_glock_dq(ghs + 1);
1012 gfs2_holder_uninit(ghs);
1013 gfs2_holder_uninit(ghs + 1);
1018 * gfs2_unlink_ok - check to see that a inode is still in a directory
1019 * @dip: the directory
1020 * @name: the name of the file
1023 * Assumes that the lock on (at least) @dip is held.
1025 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1028 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1029 const struct gfs2_inode *ip)
1033 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1036 if ((dip->i_inode.i_mode & S_ISVTX) &&
1037 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1038 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
1041 if (IS_APPEND(&dip->i_inode))
1044 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
1048 return gfs2_dir_check(&dip->i_inode, name, ip);
1052 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1053 * @dip: The parent directory
1054 * @name: The name of the entry in the parent directory
1055 * @inode: The inode to be removed
1057 * Called with all the locks and in a transaction. This will only be
1058 * called for a directory after it has been checked to ensure it is empty.
1060 * Returns: 0 on success, or an error
1063 static int gfs2_unlink_inode(struct gfs2_inode *dip,
1064 const struct dentry *dentry)
1066 struct inode *inode = d_inode(dentry);
1067 struct gfs2_inode *ip = GFS2_I(inode);
1070 error = gfs2_dir_del(dip, dentry);
1075 inode->i_ctime = current_time(inode);
1076 if (S_ISDIR(inode->i_mode))
1080 mark_inode_dirty(inode);
1081 if (inode->i_nlink == 0)
1082 gfs2_unlink_di(inode);
1088 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1089 * @dir: The inode of the directory containing the inode to unlink
1090 * @dentry: The file itself
1092 * This routine uses the type of the inode as a flag to figure out
1093 * whether this is an unlink or an rmdir.
1098 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1100 struct gfs2_inode *dip = GFS2_I(dir);
1101 struct gfs2_sbd *sdp = GFS2_SB(dir);
1102 struct inode *inode = d_inode(dentry);
1103 struct gfs2_inode *ip = GFS2_I(inode);
1104 struct gfs2_holder ghs[3];
1105 struct gfs2_rgrpd *rgd;
1108 error = gfs2_rindex_update(sdp);
1114 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1115 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1117 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1121 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1124 error = gfs2_glock_nq(ghs); /* parent */
1128 error = gfs2_glock_nq(ghs + 1); /* child */
1133 if (inode->i_nlink == 0)
1136 if (S_ISDIR(inode->i_mode)) {
1138 if (ip->i_entries > 2 || inode->i_nlink > 2)
1142 error = gfs2_glock_nq(ghs + 2); /* rgrp */
1146 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1150 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1154 error = gfs2_unlink_inode(dip, dentry);
1155 gfs2_trans_end(sdp);
1158 gfs2_glock_dq(ghs + 2);
1160 gfs2_glock_dq(ghs + 1);
1164 gfs2_holder_uninit(ghs + 2);
1166 gfs2_holder_uninit(ghs + 1);
1167 gfs2_holder_uninit(ghs);
1172 * gfs2_symlink - Create a symlink
1173 * @dir: The directory to create the symlink in
1174 * @dentry: The dentry to put the symlink in
1175 * @symname: The thing which the link points to
1180 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1181 const char *symname)
1185 size = strlen(symname);
1186 if (size >= gfs2_max_stuffed_size(GFS2_I(dir)))
1187 return -ENAMETOOLONG;
1189 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0);
1193 * gfs2_mkdir - Make a directory
1194 * @dir: The parent directory of the new one
1195 * @dentry: The dentry of the new directory
1196 * @mode: The mode of the new directory
1201 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1203 unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir));
1204 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0);
1208 * gfs2_mknod - Make a special file
1209 * @dir: The directory in which the special file will reside
1210 * @dentry: The dentry of the special file
1211 * @mode: The mode of the special file
1212 * @dev: The device specification of the special file
1216 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1219 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0);
1223 * gfs2_atomic_open - Atomically open a file
1224 * @dir: The directory
1225 * @dentry: The proposed new entry
1226 * @file: The proposed new struct file
1227 * @flags: open flags
1230 * Returns: error code or 0 for success
1233 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1234 struct file *file, unsigned flags,
1238 bool excl = !!(flags & O_EXCL);
1240 if (!d_in_lookup(dentry))
1243 d = __gfs2_lookup(dir, dentry, file);
1248 if (d_really_is_positive(dentry)) {
1249 if (!(file->f_mode & FMODE_OPENED))
1250 return finish_no_open(file, d);
1252 return excl && (flags & O_CREAT) ? -EEXIST : 0;
1258 if (!(flags & O_CREAT))
1261 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl);
1265 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1269 * Follow @to back to the root and make sure we don't encounter @this
1270 * Assumes we already hold the rename lock.
1275 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1277 struct inode *dir = &to->i_inode;
1278 struct super_block *sb = dir->i_sb;
1285 if (dir == &this->i_inode) {
1289 if (dir == d_inode(sb->s_root)) {
1294 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1300 error = PTR_ERR(tmp);
1314 * update_moved_ino - Update an inode that's being moved
1315 * @ip: The inode being moved
1316 * @ndip: The parent directory of the new filename
1317 * @dir_rename: True of ip is a directory
1322 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1326 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1328 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1329 mark_inode_dirty_sync(&ip->i_inode);
1335 * gfs2_rename - Rename a file
1336 * @odir: Parent directory of old file name
1337 * @odentry: The old dentry of the file
1338 * @ndir: Parent directory of new file name
1339 * @ndentry: The new dentry of the file
1344 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1345 struct inode *ndir, struct dentry *ndentry)
1347 struct gfs2_inode *odip = GFS2_I(odir);
1348 struct gfs2_inode *ndip = GFS2_I(ndir);
1349 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1350 struct gfs2_inode *nip = NULL;
1351 struct gfs2_sbd *sdp = GFS2_SB(odir);
1352 struct gfs2_holder ghs[4], r_gh, rd_gh;
1353 struct gfs2_rgrpd *nrgd;
1354 unsigned int num_gh;
1356 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1360 gfs2_holder_mark_uninitialized(&r_gh);
1361 gfs2_holder_mark_uninitialized(&rd_gh);
1362 if (d_really_is_positive(ndentry)) {
1363 nip = GFS2_I(d_inode(ndentry));
1368 error = gfs2_rindex_update(sdp);
1372 error = gfs2_rsqa_alloc(ndip);
1377 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1382 if (S_ISDIR(ip->i_inode.i_mode)) {
1384 /* don't move a directory into its subdir */
1385 error = gfs2_ok_to_move(ip, ndip);
1392 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs);
1394 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC,
1398 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1402 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC,
1407 for (x = 0; x < num_gh; x++) {
1408 error = gfs2_glock_nq(ghs + x);
1412 error = gfs2_glock_async_wait(num_gh, ghs);
1417 /* Grab the resource group glock for unlink flag twiddling.
1418 * This is the case where the target dinode already exists
1419 * so we unlink before doing the rename.
1421 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1426 error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1433 if (ip->i_inode.i_nlink == 0)
1436 /* Check out the old directory */
1438 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1442 /* Check out the new directory */
1445 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1449 if (nip->i_inode.i_nlink == 0) {
1454 if (S_ISDIR(nip->i_inode.i_mode)) {
1455 if (nip->i_entries < 2) {
1456 gfs2_consist_inode(nip);
1460 if (nip->i_entries > 2) {
1466 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1470 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1482 if (!ndip->i_inode.i_nlink) {
1486 if (ndip->i_entries == (u32)-1) {
1490 if (S_ISDIR(ip->i_inode.i_mode) &&
1491 ndip->i_inode.i_nlink == (u32)-1) {
1498 /* Check out the dir to be renamed */
1501 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1507 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1513 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1514 error = gfs2_quota_lock_check(ndip, &ap);
1518 error = gfs2_inplace_reserve(ndip, &ap);
1522 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1523 4 * RES_LEAF + 4, 0);
1527 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1528 5 * RES_LEAF + 4, 0);
1533 /* Remove the target file, if it exists */
1536 error = gfs2_unlink_inode(ndip, ndentry);
1538 error = update_moved_ino(ip, ndip, dir_rename);
1542 error = gfs2_dir_del(odip, odentry);
1546 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1551 gfs2_trans_end(sdp);
1554 gfs2_inplace_release(ndip);
1557 gfs2_quota_unlock(ndip);
1559 gfs2_dir_no_add(&da);
1560 if (gfs2_holder_initialized(&rd_gh))
1561 gfs2_glock_dq_uninit(&rd_gh);
1564 if (gfs2_holder_queued(ghs + x))
1565 gfs2_glock_dq(ghs + x);
1566 gfs2_holder_uninit(ghs + x);
1569 if (gfs2_holder_initialized(&r_gh))
1570 gfs2_glock_dq_uninit(&r_gh);
1576 * gfs2_exchange - exchange two files
1577 * @odir: Parent directory of old file name
1578 * @odentry: The old dentry of the file
1579 * @ndir: Parent directory of new file name
1580 * @ndentry: The new dentry of the file
1581 * @flags: The rename flags
1586 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1587 struct inode *ndir, struct dentry *ndentry,
1590 struct gfs2_inode *odip = GFS2_I(odir);
1591 struct gfs2_inode *ndip = GFS2_I(ndir);
1592 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1593 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1594 struct gfs2_sbd *sdp = GFS2_SB(odir);
1595 struct gfs2_holder ghs[4], r_gh;
1596 unsigned int num_gh;
1598 umode_t old_mode = oip->i_inode.i_mode;
1599 umode_t new_mode = nip->i_inode.i_mode;
1602 gfs2_holder_mark_uninitialized(&r_gh);
1603 error = gfs2_rindex_update(sdp);
1608 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1613 if (S_ISDIR(old_mode)) {
1614 /* don't move a directory into its subdir */
1615 error = gfs2_ok_to_move(oip, ndip);
1620 if (S_ISDIR(new_mode)) {
1621 /* don't move a directory into its subdir */
1622 error = gfs2_ok_to_move(nip, odip);
1629 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs);
1631 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC,
1635 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1638 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1641 for (x = 0; x < num_gh; x++) {
1642 error = gfs2_glock_nq(ghs + x);
1647 error = gfs2_glock_async_wait(num_gh, ghs);
1652 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1655 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1658 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1662 if (S_ISDIR(old_mode)) {
1663 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1667 if (S_ISDIR(new_mode)) {
1668 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1672 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1676 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1680 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1684 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1689 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1695 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1696 inc_nlink(&odip->i_inode);
1697 drop_nlink(&ndip->i_inode);
1698 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1699 inc_nlink(&ndip->i_inode);
1700 drop_nlink(&odip->i_inode);
1703 mark_inode_dirty(&ndip->i_inode);
1705 mark_inode_dirty(&odip->i_inode);
1708 gfs2_trans_end(sdp);
1711 if (gfs2_holder_queued(ghs + x))
1712 gfs2_glock_dq(ghs + x);
1713 gfs2_holder_uninit(ghs + x);
1716 if (gfs2_holder_initialized(&r_gh))
1717 gfs2_glock_dq_uninit(&r_gh);
1722 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1723 struct inode *ndir, struct dentry *ndentry,
1726 flags &= ~RENAME_NOREPLACE;
1728 if (flags & ~RENAME_EXCHANGE)
1731 if (flags & RENAME_EXCHANGE)
1732 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1734 return gfs2_rename(odir, odentry, ndir, ndentry);
1738 * gfs2_get_link - Follow a symbolic link
1739 * @dentry: The dentry of the link
1740 * @inode: The inode of the link
1741 * @done: destructor for return value
1743 * This can handle symlinks of any size.
1745 * Returns: 0 on success or error code
1748 static const char *gfs2_get_link(struct dentry *dentry,
1749 struct inode *inode,
1750 struct delayed_call *done)
1752 struct gfs2_inode *ip = GFS2_I(inode);
1753 struct gfs2_holder i_gh;
1754 struct buffer_head *dibh;
1760 return ERR_PTR(-ECHILD);
1762 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1763 error = gfs2_glock_nq(&i_gh);
1765 gfs2_holder_uninit(&i_gh);
1766 return ERR_PTR(error);
1769 size = (unsigned int)i_size_read(&ip->i_inode);
1771 gfs2_consist_inode(ip);
1772 buf = ERR_PTR(-EIO);
1776 error = gfs2_meta_inode_buffer(ip, &dibh);
1778 buf = ERR_PTR(error);
1782 buf = kzalloc(size + 1, GFP_NOFS);
1784 buf = ERR_PTR(-ENOMEM);
1786 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1789 gfs2_glock_dq_uninit(&i_gh);
1791 set_delayed_call(done, kfree_link, buf);
1798 * @mask: The mask to be tested
1799 * @flags: Indicates whether this is an RCU path walk or not
1801 * This may be called from the VFS directly, or from within GFS2 with the
1802 * inode locked, so we look to see if the glock is already locked and only
1803 * lock the glock if its not already been done.
1808 int gfs2_permission(struct inode *inode, int mask)
1810 struct gfs2_inode *ip;
1811 struct gfs2_holder i_gh;
1814 gfs2_holder_mark_uninitialized(&i_gh);
1816 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1817 if (mask & MAY_NOT_BLOCK)
1819 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1824 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1827 error = generic_permission(inode, mask);
1828 if (gfs2_holder_initialized(&i_gh))
1829 gfs2_glock_dq_uninit(&i_gh);
1834 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1836 setattr_copy(inode, attr);
1837 mark_inode_dirty(inode);
1842 * gfs2_setattr_simple -
1849 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1853 if (current->journal_info)
1854 return __gfs2_setattr_simple(inode, attr);
1856 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1860 error = __gfs2_setattr_simple(inode, attr);
1861 gfs2_trans_end(GFS2_SB(inode));
1865 static int setattr_chown(struct inode *inode, struct iattr *attr)
1867 struct gfs2_inode *ip = GFS2_I(inode);
1868 struct gfs2_sbd *sdp = GFS2_SB(inode);
1872 struct gfs2_alloc_parms ap;
1874 ouid = inode->i_uid;
1875 ogid = inode->i_gid;
1876 nuid = attr->ia_uid;
1877 ngid = attr->ia_gid;
1879 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1880 ouid = nuid = NO_UID_QUOTA_CHANGE;
1881 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1882 ogid = ngid = NO_GID_QUOTA_CHANGE;
1884 error = gfs2_rsqa_alloc(ip);
1888 error = gfs2_rindex_update(sdp);
1892 error = gfs2_quota_lock(ip, nuid, ngid);
1896 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1898 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1899 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1900 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1905 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1909 error = gfs2_setattr_simple(inode, attr);
1913 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1914 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1915 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1916 gfs2_quota_change(ip, ap.target, nuid, ngid);
1920 gfs2_trans_end(sdp);
1922 gfs2_quota_unlock(ip);
1928 * gfs2_setattr - Change attributes on an inode
1929 * @dentry: The dentry which is changing
1930 * @attr: The structure describing the change
1932 * The VFS layer wants to change one or more of an inodes attributes. Write
1933 * that change out to disk.
1938 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1940 struct inode *inode = d_inode(dentry);
1941 struct gfs2_inode *ip = GFS2_I(inode);
1942 struct gfs2_holder i_gh;
1945 error = gfs2_rsqa_alloc(ip);
1949 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1954 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1957 error = setattr_prepare(dentry, attr);
1961 if (attr->ia_valid & ATTR_SIZE)
1962 error = gfs2_setattr_size(inode, attr->ia_size);
1963 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1964 error = setattr_chown(inode, attr);
1966 error = gfs2_setattr_simple(inode, attr);
1967 if (!error && attr->ia_valid & ATTR_MODE)
1968 error = posix_acl_chmod(inode, inode->i_mode);
1973 mark_inode_dirty(inode);
1974 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,