2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/namei.h>
16 #include <linux/cred.h>
17 #include <linux/xattr.h>
18 #include <linux/posix_acl.h>
19 #include <linux/gfs2_ondisk.h>
20 #include <linux/crc32.h>
21 #include <linux/fiemap.h>
22 #include <linux/security.h>
23 #include <linux/uaccess.h>
41 static int iget_test(struct inode *inode, void *opaque)
43 u64 no_addr = *(u64 *)opaque;
45 return GFS2_I(inode)->i_no_addr == no_addr;
48 static int iget_set(struct inode *inode, void *opaque)
50 u64 no_addr = *(u64 *)opaque;
52 GFS2_I(inode)->i_no_addr = no_addr;
53 inode->i_ino = no_addr;
57 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
62 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr);
65 if (is_bad_inode(inode)) {
73 * gfs2_set_iop - Sets inode operations
74 * @inode: The inode with correct i_mode filled in
76 * GFS2 lookup code fills in vfs inode contents based on info obtained
77 * from directory entry inside gfs2_inode_lookup().
80 static void gfs2_set_iop(struct inode *inode)
82 struct gfs2_sbd *sdp = GFS2_SB(inode);
83 umode_t mode = inode->i_mode;
86 inode->i_op = &gfs2_file_iops;
87 if (gfs2_localflocks(sdp))
88 inode->i_fop = &gfs2_file_fops_nolock;
90 inode->i_fop = &gfs2_file_fops;
91 } else if (S_ISDIR(mode)) {
92 inode->i_op = &gfs2_dir_iops;
93 if (gfs2_localflocks(sdp))
94 inode->i_fop = &gfs2_dir_fops_nolock;
96 inode->i_fop = &gfs2_dir_fops;
97 } else if (S_ISLNK(mode)) {
98 inode->i_op = &gfs2_symlink_iops;
100 inode->i_op = &gfs2_file_iops;
101 init_special_inode(inode, inode->i_mode, inode->i_rdev);
106 * gfs2_inode_lookup - Lookup an inode
107 * @sb: The super block
108 * @type: The type of the inode
109 * @no_addr: The inode number
110 * @no_formal_ino: The inode generation number
111 * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED;
112 * GFS2_BLKST_FREE to indicate not to verify)
114 * If @type is DT_UNKNOWN, the inode type is fetched from disk.
116 * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a
117 * placeholder because it doesn't otherwise make sense), the on-disk block type
118 * is verified to be @blktype.
120 * Returns: A VFS inode, or an error
123 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
124 u64 no_addr, u64 no_formal_ino,
125 unsigned int blktype)
128 struct gfs2_inode *ip;
129 struct gfs2_glock *io_gl = NULL;
130 struct gfs2_holder i_gh;
133 gfs2_holder_mark_uninitialized(&i_gh);
134 inode = gfs2_iget(sb, no_addr);
136 return ERR_PTR(-ENOMEM);
140 if (inode->i_state & I_NEW) {
141 struct gfs2_sbd *sdp = GFS2_SB(inode);
142 ip->i_no_formal_ino = no_formal_ino;
144 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
147 flush_delayed_work(&ip->i_gl->gl_work);
149 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
153 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
155 * The GL_SKIP flag indicates to skip reading the inode
156 * block. We read the inode with gfs2_inode_refresh
157 * after possibly checking the block type.
159 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
164 if (blktype != GFS2_BLKST_FREE) {
165 error = gfs2_check_blk_type(sdp, no_addr,
172 glock_set_object(ip->i_gl, ip);
173 set_bit(GIF_INVALID, &ip->i_flags);
174 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
177 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
178 gfs2_glock_put(io_gl);
181 if (type == DT_UNKNOWN) {
182 /* Inode glock must be locked already */
183 error = gfs2_inode_refresh(GFS2_I(inode));
187 inode->i_mode = DT2IF(type);
192 inode->i_atime.tv_sec = 0;
193 inode->i_atime.tv_nsec = 0;
195 unlock_new_inode(inode);
198 if (gfs2_holder_initialized(&i_gh))
199 gfs2_glock_dq_uninit(&i_gh);
203 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
204 glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
205 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
208 gfs2_glock_put(io_gl);
209 glock_clear_object(ip->i_gl, ip);
210 if (gfs2_holder_initialized(&i_gh))
211 gfs2_glock_dq_uninit(&i_gh);
214 return ERR_PTR(error);
217 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
218 u64 *no_formal_ino, unsigned int blktype)
220 struct super_block *sb = sdp->sd_vfs;
224 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype);
228 /* Two extra checks for NFS only */
231 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
235 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
242 return ERR_PTR(error);
246 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
250 gfs2_str2qstr(&qstr, name);
251 inode = gfs2_lookupi(dip, &qstr, 1);
252 /* gfs2_lookupi has inconsistent callers: vfs
253 * related routines expect NULL for no entry found,
254 * gfs2_lookup_simple callers expect ENOENT
255 * and do not check for NULL.
258 return ERR_PTR(-ENOENT);
265 * gfs2_lookupi - Look up a filename in a directory and return its inode
266 * @d_gh: An initialized holder for the directory glock
267 * @name: The name of the inode to look for
268 * @is_root: If 1, ignore the caller's permissions
269 * @i_gh: An uninitialized holder for the new inode glock
271 * This can be called via the VFS filldir function when NFS is doing
272 * a readdirplus and the inode which its intending to stat isn't
273 * already in cache. In this case we must not take the directory glock
274 * again, since the readdir call will have already taken that lock.
279 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
282 struct super_block *sb = dir->i_sb;
283 struct gfs2_inode *dip = GFS2_I(dir);
284 struct gfs2_holder d_gh;
286 struct inode *inode = NULL;
288 gfs2_holder_mark_uninitialized(&d_gh);
289 if (!name->len || name->len > GFS2_FNAMESIZE)
290 return ERR_PTR(-ENAMETOOLONG);
292 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
293 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
294 dir == d_inode(sb->s_root))) {
299 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
300 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
302 return ERR_PTR(error);
306 error = gfs2_permission(dir, MAY_EXEC);
311 inode = gfs2_dir_search(dir, name, false);
313 error = PTR_ERR(inode);
315 if (gfs2_holder_initialized(&d_gh))
316 gfs2_glock_dq_uninit(&d_gh);
317 if (error == -ENOENT)
319 return inode ? inode : ERR_PTR(error);
323 * create_ok - OK to create a new on-disk inode here?
324 * @dip: Directory in which dinode is to be created
325 * @name: Name of new dinode
331 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
336 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
340 /* Don't create entries in an unlinked directory */
341 if (!dip->i_inode.i_nlink)
344 if (dip->i_entries == (u32)-1)
346 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
352 static void munge_mode_uid_gid(const struct gfs2_inode *dip,
355 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
356 (dip->i_inode.i_mode & S_ISUID) &&
357 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
358 if (S_ISDIR(inode->i_mode))
359 inode->i_mode |= S_ISUID;
360 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
361 inode->i_mode &= ~07111;
362 inode->i_uid = dip->i_inode.i_uid;
364 inode->i_uid = current_fsuid();
366 if (dip->i_inode.i_mode & S_ISGID) {
367 if (S_ISDIR(inode->i_mode))
368 inode->i_mode |= S_ISGID;
369 inode->i_gid = dip->i_inode.i_gid;
371 inode->i_gid = current_fsgid();
374 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
376 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
377 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
380 error = gfs2_quota_lock_check(ip, &ap);
384 error = gfs2_inplace_reserve(ip, &ap);
388 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
392 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
393 ip->i_no_formal_ino = ip->i_generation;
394 ip->i_inode.i_ino = ip->i_no_addr;
395 ip->i_goal = ip->i_no_addr;
400 gfs2_inplace_release(ip);
402 gfs2_quota_unlock(ip);
407 static void gfs2_init_dir(struct buffer_head *dibh,
408 const struct gfs2_inode *parent)
410 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
411 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
413 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
414 dent->de_inum = di->di_num; /* already GFS2 endian */
415 dent->de_type = cpu_to_be16(DT_DIR);
417 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
418 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
419 gfs2_inum_out(parent, dent);
420 dent->de_type = cpu_to_be16(DT_DIR);
425 * gfs2_init_xattr - Initialise an xattr block for a new inode
426 * @ip: The inode in question
428 * This sets up an empty xattr block for a new inode, ready to
429 * take any ACLs, LSM xattrs, etc.
432 static void gfs2_init_xattr(struct gfs2_inode *ip)
434 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
435 struct buffer_head *bh;
436 struct gfs2_ea_header *ea;
438 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
439 gfs2_trans_add_meta(ip->i_gl, bh);
440 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
441 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
443 ea = GFS2_EA_BH2FIRST(bh);
444 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
445 ea->ea_type = GFS2_EATYPE_UNUSED;
446 ea->ea_flags = GFS2_EAFLAG_LAST;
452 * init_dinode - Fill in a new dinode structure
453 * @dip: The directory this inode is being created in
455 * @symname: The symlink destination (if a symlink)
456 * @bhp: The buffer head (returned to caller)
460 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
463 struct gfs2_dinode *di;
464 struct buffer_head *dibh;
466 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
467 gfs2_trans_add_meta(ip->i_gl, dibh);
468 di = (struct gfs2_dinode *)dibh->b_data;
469 gfs2_dinode_out(ip, di);
471 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
472 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
476 memset(&di->__pad4, 0, sizeof(di->__pad4));
477 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
478 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
480 switch(ip->i_inode.i_mode & S_IFMT) {
482 gfs2_init_dir(dibh, dip);
485 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
489 set_buffer_uptodate(dibh);
494 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
495 * @dip: The directory we are linking into
496 * @da: The dir add information
497 * @nr_inodes: The number of inodes involved
499 * This calculate the number of blocks we need to reserve in a
500 * transaction to link @nr_inodes into a directory. In most cases
501 * @nr_inodes will be 2 (the directory plus the inode being linked in)
502 * but in case of rename, 4 may be required.
504 * Returns: Number of blocks
507 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
508 const struct gfs2_diradd *da,
511 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
512 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
515 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
516 struct gfs2_inode *ip, struct gfs2_diradd *da)
518 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
519 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
523 error = gfs2_quota_lock_check(dip, &ap);
525 goto fail_quota_locks;
527 error = gfs2_inplace_reserve(dip, &ap);
529 goto fail_quota_locks;
531 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
535 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
537 goto fail_quota_locks;
540 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
544 gfs2_inplace_release(dip);
546 gfs2_quota_unlock(dip);
550 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
553 const struct xattr *xattr;
556 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
557 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
559 GFS2_EATYPE_SECURITY);
567 * gfs2_create_inode - Create a new inode
568 * @dir: The parent directory
569 * @dentry: The new dentry
570 * @file: If non-NULL, the file which is being opened
571 * @mode: The permissions on the new inode
572 * @dev: For device nodes, this is the device number
573 * @symname: For symlinks, this is the link destination
574 * @size: The initial size of the inode (ignored for directories)
576 * Returns: 0 on success, or error code
579 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
581 umode_t mode, dev_t dev, const char *symname,
582 unsigned int size, int excl, int *opened)
584 const struct qstr *name = &dentry->d_name;
585 struct posix_acl *default_acl, *acl;
586 struct gfs2_holder ghs[2];
587 struct inode *inode = NULL;
588 struct gfs2_inode *dip = GFS2_I(dir), *ip;
589 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
590 struct gfs2_glock *io_gl = NULL;
591 int error, free_vfs_inode = 1;
594 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
596 if (!name->len || name->len > GFS2_FNAMESIZE)
597 return -ENAMETOOLONG;
599 error = gfs2_rsqa_alloc(dip);
603 error = gfs2_rindex_update(sdp);
607 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
610 gfs2_holder_mark_uninitialized(ghs + 1);
612 error = create_ok(dip, name, mode);
616 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
617 error = PTR_ERR(inode);
618 if (!IS_ERR(inode)) {
619 if (S_ISDIR(inode->i_mode)) {
621 inode = ERR_PTR(-EISDIR);
624 d_instantiate(dentry, inode);
627 if (S_ISREG(inode->i_mode))
628 error = finish_open(file, dentry, gfs2_open_common, opened);
630 error = finish_no_open(file, NULL);
632 gfs2_glock_dq_uninit(ghs);
634 } else if (error != -ENOENT) {
638 error = gfs2_diradd_alloc_required(dir, name, &da);
642 inode = new_inode(sdp->sd_vfs);
647 error = posix_acl_create(dir, &mode, &default_acl, &acl);
652 error = gfs2_rsqa_alloc(ip);
656 inode->i_mode = mode;
657 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
659 inode->i_size = size;
660 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
661 gfs2_set_inode_blocks(inode, 1);
662 munge_mode_uid_gid(dip, inode);
663 check_and_update_goal(dip);
664 ip->i_goal = dip->i_goal;
670 ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */
672 switch(mode & S_IFMT) {
674 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
675 gfs2_tune_get(sdp, gt_new_files_jdata))
676 ip->i_diskflags |= GFS2_DIF_JDATA;
677 gfs2_set_aops(inode);
680 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
681 ip->i_diskflags |= GFS2_DIF_JDATA;
686 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
687 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
688 ip->i_diskflags |= GFS2_DIF_SYSTEM;
690 gfs2_set_inode_flags(inode);
692 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
693 (dip->i_diskflags & GFS2_DIF_TOPDIR))
694 aflags |= GFS2_AF_ORLOV;
696 if (default_acl || acl)
699 error = alloc_dinode(ip, aflags, &blocks);
701 goto fail_free_inode;
703 gfs2_set_inode_blocks(inode, blocks);
705 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
707 goto fail_free_inode;
708 flush_delayed_work(&ip->i_gl->gl_work);
709 glock_set_object(ip->i_gl, ip);
711 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
713 goto fail_free_inode;
715 error = gfs2_trans_begin(sdp, blocks, 0);
717 goto fail_free_inode;
720 ip->i_eattr = ip->i_no_addr + 1;
723 init_dinode(dip, ip, symname);
726 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
728 goto fail_free_inode;
730 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
732 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
736 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
738 insert_inode_hash(inode);
740 free_vfs_inode = 0; /* After this point, the inode is no longer
741 considered free. Any failures need to undo
742 the gfs2 structures. */
744 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
747 posix_acl_release(default_acl);
751 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
754 posix_acl_release(acl);
758 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
759 &gfs2_initxattrs, NULL);
763 error = link_dinode(dip, name, ip, &da);
767 mark_inode_dirty(inode);
768 d_instantiate(dentry, inode);
769 /* After instantiate, errors should result in evict which will destroy
770 * both inode and iopen glocks properly. */
772 *opened |= FILE_CREATED;
773 error = finish_open(file, dentry, gfs2_open_common, opened);
775 gfs2_glock_dq_uninit(ghs);
776 gfs2_glock_dq_uninit(ghs + 1);
777 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
778 gfs2_glock_put(io_gl);
782 glock_clear_object(io_gl, ip);
783 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
785 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
786 gfs2_glock_put(io_gl);
789 glock_clear_object(ip->i_gl, ip);
790 gfs2_glock_put(ip->i_gl);
792 gfs2_rsqa_delete(ip, NULL);
794 posix_acl_release(default_acl);
795 posix_acl_release(acl);
797 gfs2_dir_no_add(&da);
798 gfs2_glock_dq_uninit(ghs);
799 if (inode && !IS_ERR(inode)) {
802 mark_inode_dirty(inode);
803 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
804 &GFS2_I(inode)->i_flags);
807 if (gfs2_holder_initialized(ghs + 1))
808 gfs2_glock_dq_uninit(ghs + 1);
814 * gfs2_create - Create a file
815 * @dir: The directory in which to create the file
816 * @dentry: The dentry of the new file
817 * @mode: The mode of the new file
822 static int gfs2_create(struct inode *dir, struct dentry *dentry,
823 umode_t mode, bool excl)
825 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL);
829 * __gfs2_lookup - Look up a filename in a directory and return its inode
830 * @dir: The directory inode
831 * @dentry: The dentry of the new inode
832 * @file: File to be opened
833 * @opened: atomic_open flags
839 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
840 struct file *file, int *opened)
844 struct gfs2_holder gh;
845 struct gfs2_glock *gl;
848 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
854 return ERR_CAST(inode);
856 gl = GFS2_I(inode)->i_gl;
857 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
860 return ERR_PTR(error);
863 d = d_splice_alias(inode, dentry);
865 gfs2_glock_dq_uninit(&gh);
868 if (file && S_ISREG(inode->i_mode))
869 error = finish_open(file, dentry, gfs2_open_common, opened);
871 gfs2_glock_dq_uninit(&gh);
874 return ERR_PTR(error);
879 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
882 return __gfs2_lookup(dir, dentry, NULL, NULL);
886 * gfs2_link - Link to a file
887 * @old_dentry: The inode to link
888 * @dir: Add link to this directory
889 * @dentry: The name of the link
891 * Link the inode in "old_dentry" into the directory "dir" with the
897 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
898 struct dentry *dentry)
900 struct gfs2_inode *dip = GFS2_I(dir);
901 struct gfs2_sbd *sdp = GFS2_SB(dir);
902 struct inode *inode = d_inode(old_dentry);
903 struct gfs2_inode *ip = GFS2_I(inode);
904 struct gfs2_holder ghs[2];
905 struct buffer_head *dibh;
906 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
909 if (S_ISDIR(inode->i_mode))
912 error = gfs2_rsqa_alloc(dip);
916 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
917 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
919 error = gfs2_glock_nq(ghs); /* parent */
923 error = gfs2_glock_nq(ghs + 1); /* child */
928 if (inode->i_nlink == 0)
931 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
935 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
946 if (!dip->i_inode.i_nlink)
949 if (dip->i_entries == (u32)-1)
952 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
955 if (!ip->i_inode.i_nlink)
958 if (ip->i_inode.i_nlink == (u32)-1)
961 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
966 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
967 error = gfs2_quota_lock_check(dip, &ap);
971 error = gfs2_inplace_reserve(dip, &ap);
975 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
979 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
984 error = gfs2_meta_inode_buffer(ip, &dibh);
988 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
992 gfs2_trans_add_meta(ip->i_gl, dibh);
993 inc_nlink(&ip->i_inode);
994 ip->i_inode.i_ctime = current_time(&ip->i_inode);
996 d_instantiate(dentry, inode);
997 mark_inode_dirty(inode);
1002 gfs2_trans_end(sdp);
1005 gfs2_inplace_release(dip);
1008 gfs2_quota_unlock(dip);
1010 gfs2_dir_no_add(&da);
1011 gfs2_glock_dq(ghs + 1);
1015 gfs2_holder_uninit(ghs);
1016 gfs2_holder_uninit(ghs + 1);
1021 * gfs2_unlink_ok - check to see that a inode is still in a directory
1022 * @dip: the directory
1023 * @name: the name of the file
1026 * Assumes that the lock on (at least) @dip is held.
1028 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1031 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1032 const struct gfs2_inode *ip)
1036 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1039 if ((dip->i_inode.i_mode & S_ISVTX) &&
1040 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1041 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
1044 if (IS_APPEND(&dip->i_inode))
1047 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
1051 return gfs2_dir_check(&dip->i_inode, name, ip);
1055 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1056 * @dip: The parent directory
1057 * @name: The name of the entry in the parent directory
1058 * @inode: The inode to be removed
1060 * Called with all the locks and in a transaction. This will only be
1061 * called for a directory after it has been checked to ensure it is empty.
1063 * Returns: 0 on success, or an error
1066 static int gfs2_unlink_inode(struct gfs2_inode *dip,
1067 const struct dentry *dentry)
1069 struct inode *inode = d_inode(dentry);
1070 struct gfs2_inode *ip = GFS2_I(inode);
1073 error = gfs2_dir_del(dip, dentry);
1078 inode->i_ctime = current_time(inode);
1079 if (S_ISDIR(inode->i_mode))
1083 mark_inode_dirty(inode);
1084 if (inode->i_nlink == 0)
1085 gfs2_unlink_di(inode);
1091 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1092 * @dir: The inode of the directory containing the inode to unlink
1093 * @dentry: The file itself
1095 * This routine uses the type of the inode as a flag to figure out
1096 * whether this is an unlink or an rmdir.
1101 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1103 struct gfs2_inode *dip = GFS2_I(dir);
1104 struct gfs2_sbd *sdp = GFS2_SB(dir);
1105 struct inode *inode = d_inode(dentry);
1106 struct gfs2_inode *ip = GFS2_I(inode);
1107 struct gfs2_holder ghs[3];
1108 struct gfs2_rgrpd *rgd;
1111 error = gfs2_rindex_update(sdp);
1117 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1118 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1120 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1124 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1127 error = gfs2_glock_nq(ghs); /* parent */
1131 error = gfs2_glock_nq(ghs + 1); /* child */
1136 if (inode->i_nlink == 0)
1139 if (S_ISDIR(inode->i_mode)) {
1141 if (ip->i_entries > 2 || inode->i_nlink > 2)
1145 error = gfs2_glock_nq(ghs + 2); /* rgrp */
1149 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1153 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1157 error = gfs2_unlink_inode(dip, dentry);
1160 gfs2_trans_end(sdp);
1162 gfs2_glock_dq(ghs + 2);
1164 gfs2_glock_dq(ghs + 1);
1168 gfs2_holder_uninit(ghs + 2);
1170 gfs2_holder_uninit(ghs + 1);
1171 gfs2_holder_uninit(ghs);
1176 * gfs2_symlink - Create a symlink
1177 * @dir: The directory to create the symlink in
1178 * @dentry: The dentry to put the symlink in
1179 * @symname: The thing which the link points to
1184 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1185 const char *symname)
1187 struct gfs2_sbd *sdp = GFS2_SB(dir);
1190 size = strlen(symname);
1191 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
1192 return -ENAMETOOLONG;
1194 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL);
1198 * gfs2_mkdir - Make a directory
1199 * @dir: The parent directory of the new one
1200 * @dentry: The dentry of the new directory
1201 * @mode: The mode of the new directory
1206 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1208 struct gfs2_sbd *sdp = GFS2_SB(dir);
1209 unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
1210 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL);
1214 * gfs2_mknod - Make a special file
1215 * @dir: The directory in which the special file will reside
1216 * @dentry: The dentry of the special file
1217 * @mode: The mode of the special file
1218 * @dev: The device specification of the special file
1222 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1225 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL);
1229 * gfs2_atomic_open - Atomically open a file
1230 * @dir: The directory
1231 * @dentry: The proposed new entry
1232 * @file: The proposed new struct file
1233 * @flags: open flags
1235 * @opened: Flag to say whether the file has been opened or not
1237 * Returns: error code or 0 for success
1240 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1241 struct file *file, unsigned flags,
1242 umode_t mode, int *opened)
1245 bool excl = !!(flags & O_EXCL);
1247 if (!d_in_lookup(dentry))
1250 d = __gfs2_lookup(dir, dentry, file, opened);
1255 if (d_really_is_positive(dentry)) {
1256 if (!(*opened & FILE_OPENED))
1257 return finish_no_open(file, d);
1259 return excl && (flags & O_CREAT) ? -EEXIST : 0;
1265 if (!(flags & O_CREAT))
1268 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened);
1272 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1276 * Follow @to back to the root and make sure we don't encounter @this
1277 * Assumes we already hold the rename lock.
1282 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1284 struct inode *dir = &to->i_inode;
1285 struct super_block *sb = dir->i_sb;
1292 if (dir == &this->i_inode) {
1296 if (dir == d_inode(sb->s_root)) {
1301 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1307 error = PTR_ERR(tmp);
1321 * update_moved_ino - Update an inode that's being moved
1322 * @ip: The inode being moved
1323 * @ndip: The parent directory of the new filename
1324 * @dir_rename: True of ip is a directory
1329 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1333 struct buffer_head *dibh;
1336 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1338 error = gfs2_meta_inode_buffer(ip, &dibh);
1341 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1342 gfs2_trans_add_meta(ip->i_gl, dibh);
1343 gfs2_dinode_out(ip, dibh->b_data);
1350 * gfs2_rename - Rename a file
1351 * @odir: Parent directory of old file name
1352 * @odentry: The old dentry of the file
1353 * @ndir: Parent directory of new file name
1354 * @ndentry: The new dentry of the file
1359 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1360 struct inode *ndir, struct dentry *ndentry)
1362 struct gfs2_inode *odip = GFS2_I(odir);
1363 struct gfs2_inode *ndip = GFS2_I(ndir);
1364 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1365 struct gfs2_inode *nip = NULL;
1366 struct gfs2_sbd *sdp = GFS2_SB(odir);
1367 struct gfs2_holder ghs[5], r_gh;
1368 struct gfs2_rgrpd *nrgd;
1369 unsigned int num_gh;
1371 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1375 gfs2_holder_mark_uninitialized(&r_gh);
1376 if (d_really_is_positive(ndentry)) {
1377 nip = GFS2_I(d_inode(ndentry));
1382 error = gfs2_rindex_update(sdp);
1386 error = gfs2_rsqa_alloc(ndip);
1391 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1396 if (S_ISDIR(ip->i_inode.i_mode)) {
1398 /* don't move a directory into its subdir */
1399 error = gfs2_ok_to_move(ip, ndip);
1406 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1408 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1411 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1415 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1417 /* grab the resource lock for unlink flag twiddling
1418 * this is the case of the target file already existing
1419 * so we unlink before doing the rename
1421 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1423 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
1426 for (x = 0; x < num_gh; x++) {
1427 error = gfs2_glock_nq(ghs + x);
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);
1561 gfs2_glock_dq(ghs + x);
1562 gfs2_holder_uninit(ghs + x);
1565 if (gfs2_holder_initialized(&r_gh))
1566 gfs2_glock_dq_uninit(&r_gh);
1572 * gfs2_exchange - exchange two files
1573 * @odir: Parent directory of old file name
1574 * @odentry: The old dentry of the file
1575 * @ndir: Parent directory of new file name
1576 * @ndentry: The new dentry of the file
1577 * @flags: The rename flags
1582 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1583 struct inode *ndir, struct dentry *ndentry,
1586 struct gfs2_inode *odip = GFS2_I(odir);
1587 struct gfs2_inode *ndip = GFS2_I(ndir);
1588 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1589 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1590 struct gfs2_sbd *sdp = GFS2_SB(odir);
1591 struct gfs2_holder ghs[5], r_gh;
1592 unsigned int num_gh;
1594 umode_t old_mode = oip->i_inode.i_mode;
1595 umode_t new_mode = nip->i_inode.i_mode;
1598 gfs2_holder_mark_uninitialized(&r_gh);
1599 error = gfs2_rindex_update(sdp);
1604 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1609 if (S_ISDIR(old_mode)) {
1610 /* don't move a directory into its subdir */
1611 error = gfs2_ok_to_move(oip, ndip);
1616 if (S_ISDIR(new_mode)) {
1617 /* don't move a directory into its subdir */
1618 error = gfs2_ok_to_move(nip, odip);
1625 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1627 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1630 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1633 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1636 for (x = 0; x < num_gh; x++) {
1637 error = gfs2_glock_nq(ghs + x);
1643 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1646 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1649 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1653 if (S_ISDIR(old_mode)) {
1654 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1658 if (S_ISDIR(new_mode)) {
1659 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1663 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1667 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1671 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1675 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1680 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1686 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1687 inc_nlink(&odip->i_inode);
1688 drop_nlink(&ndip->i_inode);
1689 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1690 inc_nlink(&ndip->i_inode);
1691 drop_nlink(&odip->i_inode);
1694 mark_inode_dirty(&ndip->i_inode);
1696 mark_inode_dirty(&odip->i_inode);
1699 gfs2_trans_end(sdp);
1702 gfs2_glock_dq(ghs + x);
1703 gfs2_holder_uninit(ghs + x);
1706 if (gfs2_holder_initialized(&r_gh))
1707 gfs2_glock_dq_uninit(&r_gh);
1712 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1713 struct inode *ndir, struct dentry *ndentry,
1716 flags &= ~RENAME_NOREPLACE;
1718 if (flags & ~RENAME_EXCHANGE)
1721 if (flags & RENAME_EXCHANGE)
1722 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1724 return gfs2_rename(odir, odentry, ndir, ndentry);
1728 * gfs2_get_link - Follow a symbolic link
1729 * @dentry: The dentry of the link
1730 * @inode: The inode of the link
1731 * @done: destructor for return value
1733 * This can handle symlinks of any size.
1735 * Returns: 0 on success or error code
1738 static const char *gfs2_get_link(struct dentry *dentry,
1739 struct inode *inode,
1740 struct delayed_call *done)
1742 struct gfs2_inode *ip = GFS2_I(inode);
1743 struct gfs2_holder i_gh;
1744 struct buffer_head *dibh;
1750 return ERR_PTR(-ECHILD);
1752 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1753 error = gfs2_glock_nq(&i_gh);
1755 gfs2_holder_uninit(&i_gh);
1756 return ERR_PTR(error);
1759 size = (unsigned int)i_size_read(&ip->i_inode);
1761 gfs2_consist_inode(ip);
1762 buf = ERR_PTR(-EIO);
1766 error = gfs2_meta_inode_buffer(ip, &dibh);
1768 buf = ERR_PTR(error);
1772 buf = kzalloc(size + 1, GFP_NOFS);
1774 buf = ERR_PTR(-ENOMEM);
1776 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1779 gfs2_glock_dq_uninit(&i_gh);
1781 set_delayed_call(done, kfree_link, buf);
1788 * @mask: The mask to be tested
1789 * @flags: Indicates whether this is an RCU path walk or not
1791 * This may be called from the VFS directly, or from within GFS2 with the
1792 * inode locked, so we look to see if the glock is already locked and only
1793 * lock the glock if its not already been done.
1798 int gfs2_permission(struct inode *inode, int mask)
1800 struct gfs2_inode *ip;
1801 struct gfs2_holder i_gh;
1804 gfs2_holder_mark_uninitialized(&i_gh);
1806 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1807 if (mask & MAY_NOT_BLOCK)
1809 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1814 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1817 error = generic_permission(inode, mask);
1818 if (gfs2_holder_initialized(&i_gh))
1819 gfs2_glock_dq_uninit(&i_gh);
1824 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1826 setattr_copy(inode, attr);
1827 mark_inode_dirty(inode);
1832 * gfs2_setattr_simple -
1839 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1843 if (current->journal_info)
1844 return __gfs2_setattr_simple(inode, attr);
1846 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1850 error = __gfs2_setattr_simple(inode, attr);
1851 gfs2_trans_end(GFS2_SB(inode));
1855 static int setattr_chown(struct inode *inode, struct iattr *attr)
1857 struct gfs2_inode *ip = GFS2_I(inode);
1858 struct gfs2_sbd *sdp = GFS2_SB(inode);
1862 struct gfs2_alloc_parms ap;
1864 ouid = inode->i_uid;
1865 ogid = inode->i_gid;
1866 nuid = attr->ia_uid;
1867 ngid = attr->ia_gid;
1869 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1870 ouid = nuid = NO_UID_QUOTA_CHANGE;
1871 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1872 ogid = ngid = NO_GID_QUOTA_CHANGE;
1874 error = gfs2_rsqa_alloc(ip);
1878 error = gfs2_rindex_update(sdp);
1882 error = gfs2_quota_lock(ip, nuid, ngid);
1886 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1888 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1889 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1890 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1895 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1899 error = gfs2_setattr_simple(inode, attr);
1903 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1904 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1905 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1906 gfs2_quota_change(ip, ap.target, nuid, ngid);
1910 gfs2_trans_end(sdp);
1912 gfs2_quota_unlock(ip);
1918 * gfs2_setattr - Change attributes on an inode
1919 * @dentry: The dentry which is changing
1920 * @attr: The structure describing the change
1922 * The VFS layer wants to change one or more of an inodes attributes. Write
1923 * that change out to disk.
1928 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1930 struct inode *inode = d_inode(dentry);
1931 struct gfs2_inode *ip = GFS2_I(inode);
1932 struct gfs2_holder i_gh;
1935 error = gfs2_rsqa_alloc(ip);
1939 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1944 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1947 error = setattr_prepare(dentry, attr);
1951 if (attr->ia_valid & ATTR_SIZE)
1952 error = gfs2_setattr_size(inode, attr->ia_size);
1953 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1954 error = setattr_chown(inode, attr);
1956 error = gfs2_setattr_simple(inode, attr);
1957 if (!error && attr->ia_valid & ATTR_MODE)
1958 error = posix_acl_chmod(inode, inode->i_mode);
1963 mark_inode_dirty(inode);
1964 gfs2_glock_dq_uninit(&i_gh);
1969 * gfs2_getattr - Read out an inode's attributes
1970 * @path: Object to query
1971 * @stat: The inode's stats
1972 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests
1973 * @flags: AT_STATX_xxx setting
1975 * This may be called from the VFS directly, or from within GFS2 with the
1976 * inode locked, so we look to see if the glock is already locked and only
1977 * lock the glock if its not already been done. Note that its the NFS
1978 * readdirplus operation which causes this to be called (from filldir)
1979 * with the glock already held.
1984 static int gfs2_getattr(const struct path *path, struct kstat *stat,
1985 u32 request_mask, unsigned int flags)
1987 struct inode *inode = d_inode(path->dentry);
1988 struct gfs2_inode *ip = GFS2_I(inode);
1989 struct gfs2_holder gh;
1992 gfs2_holder_mark_uninitialized(&gh);
1993 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1994 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1999 generic_fillattr(inode, stat);
2000 if (gfs2_holder_initialized(&gh))
2001 gfs2_glock_dq_uninit(&gh);
2006 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2009 struct gfs2_inode *ip = GFS2_I(inode);
2010 struct gfs2_holder gh;
2013 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
2019 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2023 if (gfs2_is_stuffed(ip)) {
2024 u64 phys = ip->i_no_addr << inode->i_blkbits;
2025 u64 size = i_size_read(inode);
2026 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
2027 FIEMAP_EXTENT_DATA_INLINE;
2028 phys += sizeof(struct gfs2_dinode);
2030 if (start + len > size)
2033 ret = fiemap_fill_next_extent(fieinfo, start, phys,
2038 ret = __generic_block_fiemap(inode, fieinfo, start, len,
2042 gfs2_glock_dq_uninit(&gh);
2044 inode_unlock(inode);
2048 const struct inode_operations gfs2_file_iops = {
2049 .permission = gfs2_permission,
2050 .setattr = gfs2_setattr,
2051 .getattr = gfs2_getattr,
2052 .listxattr = gfs2_listxattr,
2053 .fiemap = gfs2_fiemap,
2054 .get_acl = gfs2_get_acl,
2055 .set_acl = gfs2_set_acl,
2058 const struct inode_operations gfs2_dir_iops = {
2059 .create = gfs2_create,
2060 .lookup = gfs2_lookup,
2062 .unlink = gfs2_unlink,
2063 .symlink = gfs2_symlink,
2064 .mkdir = gfs2_mkdir,
2065 .rmdir = gfs2_unlink,
2066 .mknod = gfs2_mknod,
2067 .rename = gfs2_rename2,
2068 .permission = gfs2_permission,
2069 .setattr = gfs2_setattr,
2070 .getattr = gfs2_getattr,
2071 .listxattr = gfs2_listxattr,
2072 .fiemap = gfs2_fiemap,
2073 .get_acl = gfs2_get_acl,
2074 .set_acl = gfs2_set_acl,
2075 .atomic_open = gfs2_atomic_open,
2078 const struct inode_operations gfs2_symlink_iops = {
2079 .get_link = gfs2_get_link,
2080 .permission = gfs2_permission,
2081 .setattr = gfs2_setattr,
2082 .getattr = gfs2_getattr,
2083 .listxattr = gfs2_listxattr,
2084 .fiemap = gfs2_fiemap,