2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/namei.h>
16 #include <linux/xattr.h>
17 #include <linux/posix_acl.h>
18 #include <linux/gfs2_ondisk.h>
19 #include <linux/crc32.h>
20 #include <linux/fiemap.h>
21 #include <linux/security.h>
22 #include <asm/uaccess.h>
40 struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
42 return ilookup(sb, (unsigned long)no_addr);
46 * gfs2_set_iop - Sets inode operations
47 * @inode: The inode with correct i_mode filled in
49 * GFS2 lookup code fills in vfs inode contents based on info obtained
50 * from directory entry inside gfs2_inode_lookup().
53 static void gfs2_set_iop(struct inode *inode)
55 struct gfs2_sbd *sdp = GFS2_SB(inode);
56 umode_t mode = inode->i_mode;
59 inode->i_op = &gfs2_file_iops;
60 if (gfs2_localflocks(sdp))
61 inode->i_fop = &gfs2_file_fops_nolock;
63 inode->i_fop = &gfs2_file_fops;
64 } else if (S_ISDIR(mode)) {
65 inode->i_op = &gfs2_dir_iops;
66 if (gfs2_localflocks(sdp))
67 inode->i_fop = &gfs2_dir_fops_nolock;
69 inode->i_fop = &gfs2_dir_fops;
70 } else if (S_ISLNK(mode)) {
71 inode->i_op = &gfs2_symlink_iops;
73 inode->i_op = &gfs2_file_iops;
74 init_special_inode(inode, inode->i_mode, inode->i_rdev);
79 * gfs2_inode_lookup - Lookup an inode
80 * @sb: The super block
81 * @no_addr: The inode number
82 * @type: The type of the inode
84 * Returns: A VFS inode, or an error
87 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
88 u64 no_addr, u64 no_formal_ino)
91 struct gfs2_inode *ip;
92 struct gfs2_glock *io_gl = NULL;
95 inode = iget_locked(sb, (unsigned long)no_addr);
97 return ERR_PTR(-ENOMEM);
100 ip->i_no_addr = no_addr;
102 if (inode->i_state & I_NEW) {
103 struct gfs2_sbd *sdp = GFS2_SB(inode);
104 ip->i_no_formal_ino = no_formal_ino;
106 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
109 ip->i_gl->gl_object = ip;
111 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
115 set_bit(GIF_INVALID, &ip->i_flags);
116 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
120 ip->i_iopen_gh.gh_gl->gl_object = ip;
121 gfs2_glock_put(io_gl);
124 if (type == DT_UNKNOWN) {
125 /* Inode glock must be locked already */
126 error = gfs2_inode_refresh(GFS2_I(inode));
130 inode->i_mode = DT2IF(type);
134 unlock_new_inode(inode);
140 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
141 ip->i_iopen_gh.gh_gl->gl_object = NULL;
142 gfs2_glock_dq_wait(&ip->i_iopen_gh);
143 gfs2_holder_uninit(&ip->i_iopen_gh);
146 gfs2_glock_put(io_gl);
148 ip->i_gl->gl_object = NULL;
151 return ERR_PTR(error);
154 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
155 u64 *no_formal_ino, unsigned int blktype)
157 struct super_block *sb = sdp->sd_vfs;
158 struct gfs2_holder i_gh;
159 struct inode *inode = NULL;
162 /* Must not read in block until block type is verified */
163 error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops,
164 LM_ST_EXCLUSIVE, GL_SKIP, &i_gh);
166 return ERR_PTR(error);
168 error = gfs2_check_blk_type(sdp, no_addr, blktype);
172 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0);
176 /* Two extra checks for NFS only */
179 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
183 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
190 gfs2_glock_dq_uninit(&i_gh);
191 return error ? ERR_PTR(error) : inode;
198 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
202 gfs2_str2qstr(&qstr, name);
203 inode = gfs2_lookupi(dip, &qstr, 1);
204 /* gfs2_lookupi has inconsistent callers: vfs
205 * related routines expect NULL for no entry found,
206 * gfs2_lookup_simple callers expect ENOENT
207 * and do not check for NULL.
210 return ERR_PTR(-ENOENT);
217 * gfs2_lookupi - Look up a filename in a directory and return its inode
218 * @d_gh: An initialized holder for the directory glock
219 * @name: The name of the inode to look for
220 * @is_root: If 1, ignore the caller's permissions
221 * @i_gh: An uninitialized holder for the new inode glock
223 * This can be called via the VFS filldir function when NFS is doing
224 * a readdirplus and the inode which its intending to stat isn't
225 * already in cache. In this case we must not take the directory glock
226 * again, since the readdir call will have already taken that lock.
231 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
234 struct super_block *sb = dir->i_sb;
235 struct gfs2_inode *dip = GFS2_I(dir);
236 struct gfs2_holder d_gh;
238 struct inode *inode = NULL;
241 if (!name->len || name->len > GFS2_FNAMESIZE)
242 return ERR_PTR(-ENAMETOOLONG);
244 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
245 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
246 dir == d_inode(sb->s_root))) {
251 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
252 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
254 return ERR_PTR(error);
259 error = gfs2_permission(dir, MAY_EXEC);
264 inode = gfs2_dir_search(dir, name, false);
266 error = PTR_ERR(inode);
269 gfs2_glock_dq_uninit(&d_gh);
270 if (error == -ENOENT)
272 return inode ? inode : ERR_PTR(error);
276 * create_ok - OK to create a new on-disk inode here?
277 * @dip: Directory in which dinode is to be created
278 * @name: Name of new dinode
284 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
289 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
293 /* Don't create entries in an unlinked directory */
294 if (!dip->i_inode.i_nlink)
297 if (dip->i_entries == (u32)-1)
299 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
305 static void munge_mode_uid_gid(const struct gfs2_inode *dip,
308 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
309 (dip->i_inode.i_mode & S_ISUID) &&
310 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
311 if (S_ISDIR(inode->i_mode))
312 inode->i_mode |= S_ISUID;
313 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
314 inode->i_mode &= ~07111;
315 inode->i_uid = dip->i_inode.i_uid;
317 inode->i_uid = current_fsuid();
319 if (dip->i_inode.i_mode & S_ISGID) {
320 if (S_ISDIR(inode->i_mode))
321 inode->i_mode |= S_ISGID;
322 inode->i_gid = dip->i_inode.i_gid;
324 inode->i_gid = current_fsgid();
327 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
329 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
330 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
333 error = gfs2_quota_lock_check(ip, &ap);
337 error = gfs2_inplace_reserve(ip, &ap);
341 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
345 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
346 ip->i_no_formal_ino = ip->i_generation;
347 ip->i_inode.i_ino = ip->i_no_addr;
348 ip->i_goal = ip->i_no_addr;
353 gfs2_inplace_release(ip);
355 gfs2_quota_unlock(ip);
360 static void gfs2_init_dir(struct buffer_head *dibh,
361 const struct gfs2_inode *parent)
363 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
364 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
366 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
367 dent->de_inum = di->di_num; /* already GFS2 endian */
368 dent->de_type = cpu_to_be16(DT_DIR);
370 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
371 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
372 gfs2_inum_out(parent, dent);
373 dent->de_type = cpu_to_be16(DT_DIR);
378 * gfs2_init_xattr - Initialise an xattr block for a new inode
379 * @ip: The inode in question
381 * This sets up an empty xattr block for a new inode, ready to
382 * take any ACLs, LSM xattrs, etc.
385 static void gfs2_init_xattr(struct gfs2_inode *ip)
387 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
388 struct buffer_head *bh;
389 struct gfs2_ea_header *ea;
391 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
392 gfs2_trans_add_meta(ip->i_gl, bh);
393 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
394 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
396 ea = GFS2_EA_BH2FIRST(bh);
397 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
398 ea->ea_type = GFS2_EATYPE_UNUSED;
399 ea->ea_flags = GFS2_EAFLAG_LAST;
405 * init_dinode - Fill in a new dinode structure
406 * @dip: The directory this inode is being created in
408 * @symname: The symlink destination (if a symlink)
409 * @bhp: The buffer head (returned to caller)
413 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
416 struct gfs2_dinode *di;
417 struct buffer_head *dibh;
419 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
420 gfs2_trans_add_meta(ip->i_gl, dibh);
421 di = (struct gfs2_dinode *)dibh->b_data;
422 gfs2_dinode_out(ip, di);
424 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
425 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
429 memset(&di->__pad4, 0, sizeof(di->__pad4));
430 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
431 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
433 switch(ip->i_inode.i_mode & S_IFMT) {
435 gfs2_init_dir(dibh, dip);
438 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
442 set_buffer_uptodate(dibh);
447 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
448 * @dip: The directory we are linking into
449 * @da: The dir add information
450 * @nr_inodes: The number of inodes involved
452 * This calculate the number of blocks we need to reserve in a
453 * transaction to link @nr_inodes into a directory. In most cases
454 * @nr_inodes will be 2 (the directory plus the inode being linked in)
455 * but in case of rename, 4 may be required.
457 * Returns: Number of blocks
460 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
461 const struct gfs2_diradd *da,
464 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
465 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
468 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
469 struct gfs2_inode *ip, struct gfs2_diradd *da)
471 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
472 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
476 error = gfs2_quota_lock_check(dip, &ap);
478 goto fail_quota_locks;
480 error = gfs2_inplace_reserve(dip, &ap);
482 goto fail_quota_locks;
484 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
488 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
490 goto fail_quota_locks;
493 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
497 gfs2_inplace_release(dip);
499 gfs2_quota_unlock(dip);
503 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
506 const struct xattr *xattr;
509 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
510 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
512 GFS2_EATYPE_SECURITY);
520 * gfs2_create_inode - Create a new inode
521 * @dir: The parent directory
522 * @dentry: The new dentry
523 * @file: If non-NULL, the file which is being opened
524 * @mode: The permissions on the new inode
525 * @dev: For device nodes, this is the device number
526 * @symname: For symlinks, this is the link destination
527 * @size: The initial size of the inode (ignored for directories)
529 * Returns: 0 on success, or error code
532 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
534 umode_t mode, dev_t dev, const char *symname,
535 unsigned int size, int excl, int *opened)
537 const struct qstr *name = &dentry->d_name;
538 struct posix_acl *default_acl, *acl;
539 struct gfs2_holder ghs[2];
540 struct inode *inode = NULL;
541 struct gfs2_inode *dip = GFS2_I(dir), *ip;
542 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
543 struct gfs2_glock *io_gl = NULL;
544 int error, free_vfs_inode = 1;
547 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
549 if (!name->len || name->len > GFS2_FNAMESIZE)
550 return -ENAMETOOLONG;
552 error = gfs2_rsqa_alloc(dip);
556 error = gfs2_rindex_update(sdp);
560 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
564 error = create_ok(dip, name, mode);
568 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
569 error = PTR_ERR(inode);
570 if (!IS_ERR(inode)) {
571 if (S_ISDIR(inode->i_mode)) {
573 inode = ERR_PTR(-EISDIR);
576 d_instantiate(dentry, inode);
579 if (S_ISREG(inode->i_mode))
580 error = finish_open(file, dentry, gfs2_open_common, opened);
582 error = finish_no_open(file, NULL);
584 gfs2_glock_dq_uninit(ghs);
586 } else if (error != -ENOENT) {
590 error = gfs2_diradd_alloc_required(dir, name, &da);
594 inode = new_inode(sdp->sd_vfs);
599 error = posix_acl_create(dir, &mode, &default_acl, &acl);
604 error = gfs2_rsqa_alloc(ip);
608 inode->i_mode = mode;
609 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
611 inode->i_size = size;
612 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
613 gfs2_set_inode_blocks(inode, 1);
614 munge_mode_uid_gid(dip, inode);
615 check_and_update_goal(dip);
616 ip->i_goal = dip->i_goal;
623 switch(mode & S_IFMT) {
625 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
626 gfs2_tune_get(sdp, gt_new_files_jdata))
627 ip->i_diskflags |= GFS2_DIF_JDATA;
628 gfs2_set_aops(inode);
631 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
632 ip->i_diskflags |= GFS2_DIF_JDATA;
637 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
638 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
639 ip->i_diskflags |= GFS2_DIF_SYSTEM;
641 gfs2_set_inode_flags(inode);
643 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
644 (dip->i_diskflags & GFS2_DIF_TOPDIR))
645 aflags |= GFS2_AF_ORLOV;
647 if (default_acl || acl)
650 error = alloc_dinode(ip, aflags, &blocks);
652 goto fail_free_inode;
654 gfs2_set_inode_blocks(inode, blocks);
656 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
658 goto fail_free_inode;
660 ip->i_gl->gl_object = ip;
661 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
663 goto fail_free_inode;
665 error = gfs2_trans_begin(sdp, blocks, 0);
670 ip->i_eattr = ip->i_no_addr + 1;
673 init_dinode(dip, ip, symname);
676 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
680 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
682 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
686 ip->i_iopen_gh.gh_gl->gl_object = ip;
687 gfs2_glock_put(io_gl);
689 insert_inode_hash(inode);
691 free_vfs_inode = 0; /* After this point, the inode is no longer
692 considered free. Any failures need to undo
693 the gfs2 structures. */
695 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
696 posix_acl_release(default_acl);
700 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
701 posix_acl_release(acl);
707 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
708 &gfs2_initxattrs, NULL);
712 error = link_dinode(dip, name, ip, &da);
716 mark_inode_dirty(inode);
717 d_instantiate(dentry, inode);
719 *opened |= FILE_CREATED;
720 error = finish_open(file, dentry, gfs2_open_common, opened);
722 gfs2_glock_dq_uninit(ghs);
723 gfs2_glock_dq_uninit(ghs + 1);
724 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
728 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
729 gfs2_glock_put(io_gl);
732 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
733 gfs2_glock_dq_uninit(ghs + 1);
736 gfs2_glock_put(ip->i_gl);
737 gfs2_rsqa_delete(ip, NULL);
740 posix_acl_release(default_acl);
742 posix_acl_release(acl);
744 gfs2_dir_no_add(&da);
745 gfs2_glock_dq_uninit(ghs);
746 if (inode && !IS_ERR(inode)) {
749 mark_inode_dirty(inode);
750 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
751 &GFS2_I(inode)->i_flags);
759 * gfs2_create - Create a file
760 * @dir: The directory in which to create the file
761 * @dentry: The dentry of the new file
762 * @mode: The mode of the new file
767 static int gfs2_create(struct inode *dir, struct dentry *dentry,
768 umode_t mode, bool excl)
770 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL);
774 * __gfs2_lookup - Look up a filename in a directory and return its inode
775 * @dir: The directory inode
776 * @dentry: The dentry of the new inode
777 * @file: File to be opened
778 * @opened: atomic_open flags
784 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
785 struct file *file, int *opened)
789 struct gfs2_holder gh;
790 struct gfs2_glock *gl;
793 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
799 return ERR_CAST(inode);
801 gl = GFS2_I(inode)->i_gl;
802 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
805 return ERR_PTR(error);
808 d = d_splice_alias(inode, dentry);
810 gfs2_glock_dq_uninit(&gh);
813 if (file && S_ISREG(inode->i_mode))
814 error = finish_open(file, dentry, gfs2_open_common, opened);
816 gfs2_glock_dq_uninit(&gh);
819 return ERR_PTR(error);
824 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
827 return __gfs2_lookup(dir, dentry, NULL, NULL);
831 * gfs2_link - Link to a file
832 * @old_dentry: The inode to link
833 * @dir: Add link to this directory
834 * @dentry: The name of the link
836 * Link the inode in "old_dentry" into the directory "dir" with the
842 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
843 struct dentry *dentry)
845 struct gfs2_inode *dip = GFS2_I(dir);
846 struct gfs2_sbd *sdp = GFS2_SB(dir);
847 struct inode *inode = d_inode(old_dentry);
848 struct gfs2_inode *ip = GFS2_I(inode);
849 struct gfs2_holder ghs[2];
850 struct buffer_head *dibh;
851 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
854 if (S_ISDIR(inode->i_mode))
857 error = gfs2_rsqa_alloc(dip);
861 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
862 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
864 error = gfs2_glock_nq(ghs); /* parent */
868 error = gfs2_glock_nq(ghs + 1); /* child */
873 if (inode->i_nlink == 0)
876 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
880 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
891 if (!dip->i_inode.i_nlink)
894 if (dip->i_entries == (u32)-1)
897 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
900 if (!ip->i_inode.i_nlink)
903 if (ip->i_inode.i_nlink == (u32)-1)
906 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
911 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
912 error = gfs2_quota_lock_check(dip, &ap);
916 error = gfs2_inplace_reserve(dip, &ap);
920 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
924 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
929 error = gfs2_meta_inode_buffer(ip, &dibh);
933 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
937 gfs2_trans_add_meta(ip->i_gl, dibh);
938 inc_nlink(&ip->i_inode);
939 ip->i_inode.i_ctime = CURRENT_TIME;
941 d_instantiate(dentry, inode);
942 mark_inode_dirty(inode);
950 gfs2_inplace_release(dip);
953 gfs2_quota_unlock(dip);
955 gfs2_dir_no_add(&da);
956 gfs2_glock_dq(ghs + 1);
960 gfs2_holder_uninit(ghs);
961 gfs2_holder_uninit(ghs + 1);
966 * gfs2_unlink_ok - check to see that a inode is still in a directory
967 * @dip: the directory
968 * @name: the name of the file
971 * Assumes that the lock on (at least) @dip is held.
973 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
976 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
977 const struct gfs2_inode *ip)
981 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
984 if ((dip->i_inode.i_mode & S_ISVTX) &&
985 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
986 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
989 if (IS_APPEND(&dip->i_inode))
992 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
996 return gfs2_dir_check(&dip->i_inode, name, ip);
1000 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1001 * @dip: The parent directory
1002 * @name: The name of the entry in the parent directory
1003 * @inode: The inode to be removed
1005 * Called with all the locks and in a transaction. This will only be
1006 * called for a directory after it has been checked to ensure it is empty.
1008 * Returns: 0 on success, or an error
1011 static int gfs2_unlink_inode(struct gfs2_inode *dip,
1012 const struct dentry *dentry)
1014 struct inode *inode = d_inode(dentry);
1015 struct gfs2_inode *ip = GFS2_I(inode);
1018 error = gfs2_dir_del(dip, dentry);
1023 inode->i_ctime = CURRENT_TIME;
1024 if (S_ISDIR(inode->i_mode))
1028 mark_inode_dirty(inode);
1029 if (inode->i_nlink == 0)
1030 gfs2_unlink_di(inode);
1036 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1037 * @dir: The inode of the directory containing the inode to unlink
1038 * @dentry: The file itself
1040 * This routine uses the type of the inode as a flag to figure out
1041 * whether this is an unlink or an rmdir.
1046 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1048 struct gfs2_inode *dip = GFS2_I(dir);
1049 struct gfs2_sbd *sdp = GFS2_SB(dir);
1050 struct inode *inode = d_inode(dentry);
1051 struct gfs2_inode *ip = GFS2_I(inode);
1052 struct gfs2_holder ghs[3];
1053 struct gfs2_rgrpd *rgd;
1056 error = gfs2_rindex_update(sdp);
1062 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1063 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1065 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1069 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1072 error = gfs2_glock_nq(ghs); /* parent */
1076 error = gfs2_glock_nq(ghs + 1); /* child */
1081 if (inode->i_nlink == 0)
1084 if (S_ISDIR(inode->i_mode)) {
1086 if (ip->i_entries > 2 || inode->i_nlink > 2)
1090 error = gfs2_glock_nq(ghs + 2); /* rgrp */
1094 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1098 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1102 error = gfs2_unlink_inode(dip, dentry);
1105 gfs2_trans_end(sdp);
1107 gfs2_glock_dq(ghs + 2);
1109 gfs2_glock_dq(ghs + 1);
1113 gfs2_holder_uninit(ghs + 2);
1115 gfs2_holder_uninit(ghs + 1);
1116 gfs2_holder_uninit(ghs);
1121 * gfs2_symlink - Create a symlink
1122 * @dir: The directory to create the symlink in
1123 * @dentry: The dentry to put the symlink in
1124 * @symname: The thing which the link points to
1129 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1130 const char *symname)
1132 struct gfs2_sbd *sdp = GFS2_SB(dir);
1135 size = strlen(symname);
1136 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
1137 return -ENAMETOOLONG;
1139 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL);
1143 * gfs2_mkdir - Make a directory
1144 * @dir: The parent directory of the new one
1145 * @dentry: The dentry of the new directory
1146 * @mode: The mode of the new directory
1151 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1153 struct gfs2_sbd *sdp = GFS2_SB(dir);
1154 unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
1155 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL);
1159 * gfs2_mknod - Make a special file
1160 * @dir: The directory in which the special file will reside
1161 * @dentry: The dentry of the special file
1162 * @mode: The mode of the special file
1163 * @dev: The device specification of the special file
1167 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1170 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL);
1174 * gfs2_atomic_open - Atomically open a file
1175 * @dir: The directory
1176 * @dentry: The proposed new entry
1177 * @file: The proposed new struct file
1178 * @flags: open flags
1180 * @opened: Flag to say whether the file has been opened or not
1182 * Returns: error code or 0 for success
1185 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1186 struct file *file, unsigned flags,
1187 umode_t mode, int *opened)
1190 bool excl = !!(flags & O_EXCL);
1192 if (!d_unhashed(dentry))
1195 d = __gfs2_lookup(dir, dentry, file, opened);
1200 if (d_really_is_positive(dentry)) {
1201 if (!(*opened & FILE_OPENED))
1202 return finish_no_open(file, d);
1210 if (!(flags & O_CREAT))
1213 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened);
1217 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1221 * Follow @to back to the root and make sure we don't encounter @this
1222 * Assumes we already hold the rename lock.
1227 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1229 struct inode *dir = &to->i_inode;
1230 struct super_block *sb = dir->i_sb;
1237 if (dir == &this->i_inode) {
1241 if (dir == d_inode(sb->s_root)) {
1246 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1252 error = PTR_ERR(tmp);
1266 * update_moved_ino - Update an inode that's being moved
1267 * @ip: The inode being moved
1268 * @ndip: The parent directory of the new filename
1269 * @dir_rename: True of ip is a directory
1274 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1278 struct buffer_head *dibh;
1281 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1283 error = gfs2_meta_inode_buffer(ip, &dibh);
1286 ip->i_inode.i_ctime = CURRENT_TIME;
1287 gfs2_trans_add_meta(ip->i_gl, dibh);
1288 gfs2_dinode_out(ip, dibh->b_data);
1295 * gfs2_rename - Rename a file
1296 * @odir: Parent directory of old file name
1297 * @odentry: The old dentry of the file
1298 * @ndir: Parent directory of new file name
1299 * @ndentry: The new dentry of the file
1304 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1305 struct inode *ndir, struct dentry *ndentry)
1307 struct gfs2_inode *odip = GFS2_I(odir);
1308 struct gfs2_inode *ndip = GFS2_I(ndir);
1309 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1310 struct gfs2_inode *nip = NULL;
1311 struct gfs2_sbd *sdp = GFS2_SB(odir);
1312 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
1313 struct gfs2_rgrpd *nrgd;
1314 unsigned int num_gh;
1316 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1320 if (d_really_is_positive(ndentry)) {
1321 nip = GFS2_I(d_inode(ndentry));
1326 error = gfs2_rindex_update(sdp);
1330 error = gfs2_rsqa_alloc(ndip);
1335 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1340 if (S_ISDIR(ip->i_inode.i_mode)) {
1342 /* don't move a directory into its subdir */
1343 error = gfs2_ok_to_move(ip, ndip);
1350 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1352 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1355 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1359 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1361 /* grab the resource lock for unlink flag twiddling
1362 * this is the case of the target file already existing
1363 * so we unlink before doing the rename
1365 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1367 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
1370 for (x = 0; x < num_gh; x++) {
1371 error = gfs2_glock_nq(ghs + x);
1377 if (ip->i_inode.i_nlink == 0)
1380 /* Check out the old directory */
1382 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1386 /* Check out the new directory */
1389 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1393 if (nip->i_inode.i_nlink == 0) {
1398 if (S_ISDIR(nip->i_inode.i_mode)) {
1399 if (nip->i_entries < 2) {
1400 gfs2_consist_inode(nip);
1404 if (nip->i_entries > 2) {
1410 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1414 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1426 if (!ndip->i_inode.i_nlink) {
1430 if (ndip->i_entries == (u32)-1) {
1434 if (S_ISDIR(ip->i_inode.i_mode) &&
1435 ndip->i_inode.i_nlink == (u32)-1) {
1442 /* Check out the dir to be renamed */
1445 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1451 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1457 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1458 error = gfs2_quota_lock_check(ndip, &ap);
1462 error = gfs2_inplace_reserve(ndip, &ap);
1466 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1467 4 * RES_LEAF + 4, 0);
1471 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1472 5 * RES_LEAF + 4, 0);
1477 /* Remove the target file, if it exists */
1480 error = gfs2_unlink_inode(ndip, ndentry);
1482 error = update_moved_ino(ip, ndip, dir_rename);
1486 error = gfs2_dir_del(odip, odentry);
1490 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1495 gfs2_trans_end(sdp);
1498 gfs2_inplace_release(ndip);
1501 gfs2_quota_unlock(ndip);
1503 gfs2_dir_no_add(&da);
1505 gfs2_glock_dq(ghs + x);
1506 gfs2_holder_uninit(ghs + x);
1510 gfs2_glock_dq_uninit(&r_gh);
1516 * gfs2_exchange - exchange two files
1517 * @odir: Parent directory of old file name
1518 * @odentry: The old dentry of the file
1519 * @ndir: Parent directory of new file name
1520 * @ndentry: The new dentry of the file
1521 * @flags: The rename flags
1526 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1527 struct inode *ndir, struct dentry *ndentry,
1530 struct gfs2_inode *odip = GFS2_I(odir);
1531 struct gfs2_inode *ndip = GFS2_I(ndir);
1532 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1533 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1534 struct gfs2_sbd *sdp = GFS2_SB(odir);
1535 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
1536 unsigned int num_gh;
1538 umode_t old_mode = oip->i_inode.i_mode;
1539 umode_t new_mode = nip->i_inode.i_mode;
1542 error = gfs2_rindex_update(sdp);
1547 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1552 if (S_ISDIR(old_mode)) {
1553 /* don't move a directory into its subdir */
1554 error = gfs2_ok_to_move(oip, ndip);
1559 if (S_ISDIR(new_mode)) {
1560 /* don't move a directory into its subdir */
1561 error = gfs2_ok_to_move(nip, odip);
1568 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1570 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1573 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1576 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1579 for (x = 0; x < num_gh; x++) {
1580 error = gfs2_glock_nq(ghs + x);
1586 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1589 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1592 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1596 if (S_ISDIR(old_mode)) {
1597 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1601 if (S_ISDIR(new_mode)) {
1602 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1606 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1610 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1614 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1618 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1623 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1629 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1630 inc_nlink(&odip->i_inode);
1631 drop_nlink(&ndip->i_inode);
1632 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1633 inc_nlink(&ndip->i_inode);
1634 drop_nlink(&odip->i_inode);
1637 mark_inode_dirty(&ndip->i_inode);
1639 mark_inode_dirty(&odip->i_inode);
1642 gfs2_trans_end(sdp);
1645 gfs2_glock_dq(ghs + x);
1646 gfs2_holder_uninit(ghs + x);
1650 gfs2_glock_dq_uninit(&r_gh);
1655 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1656 struct inode *ndir, struct dentry *ndentry,
1659 flags &= ~RENAME_NOREPLACE;
1661 if (flags & ~RENAME_EXCHANGE)
1664 if (flags & RENAME_EXCHANGE)
1665 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1667 return gfs2_rename(odir, odentry, ndir, ndentry);
1671 * gfs2_get_link - Follow a symbolic link
1672 * @dentry: The dentry of the link
1673 * @inode: The inode of the link
1674 * @done: destructor for return value
1676 * This can handle symlinks of any size.
1678 * Returns: 0 on success or error code
1681 static const char *gfs2_get_link(struct dentry *dentry,
1682 struct inode *inode,
1683 struct delayed_call *done)
1685 struct gfs2_inode *ip = GFS2_I(inode);
1686 struct gfs2_holder i_gh;
1687 struct buffer_head *dibh;
1693 return ERR_PTR(-ECHILD);
1695 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1696 error = gfs2_glock_nq(&i_gh);
1698 gfs2_holder_uninit(&i_gh);
1699 return ERR_PTR(error);
1702 size = (unsigned int)i_size_read(&ip->i_inode);
1704 gfs2_consist_inode(ip);
1705 buf = ERR_PTR(-EIO);
1709 error = gfs2_meta_inode_buffer(ip, &dibh);
1711 buf = ERR_PTR(error);
1715 buf = kzalloc(size + 1, GFP_NOFS);
1717 buf = ERR_PTR(-ENOMEM);
1719 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1722 gfs2_glock_dq_uninit(&i_gh);
1724 set_delayed_call(done, kfree_link, buf);
1731 * @mask: The mask to be tested
1732 * @flags: Indicates whether this is an RCU path walk or not
1734 * This may be called from the VFS directly, or from within GFS2 with the
1735 * inode locked, so we look to see if the glock is already locked and only
1736 * lock the glock if its not already been done.
1741 int gfs2_permission(struct inode *inode, int mask)
1743 struct gfs2_inode *ip;
1744 struct gfs2_holder i_gh;
1750 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1751 if (mask & MAY_NOT_BLOCK)
1753 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1759 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1762 error = generic_permission(inode, mask);
1764 gfs2_glock_dq_uninit(&i_gh);
1769 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1771 setattr_copy(inode, attr);
1772 mark_inode_dirty(inode);
1777 * gfs2_setattr_simple -
1784 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1788 if (current->journal_info)
1789 return __gfs2_setattr_simple(inode, attr);
1791 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1795 error = __gfs2_setattr_simple(inode, attr);
1796 gfs2_trans_end(GFS2_SB(inode));
1800 static int setattr_chown(struct inode *inode, struct iattr *attr)
1802 struct gfs2_inode *ip = GFS2_I(inode);
1803 struct gfs2_sbd *sdp = GFS2_SB(inode);
1807 struct gfs2_alloc_parms ap;
1809 ouid = inode->i_uid;
1810 ogid = inode->i_gid;
1811 nuid = attr->ia_uid;
1812 ngid = attr->ia_gid;
1814 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1815 ouid = nuid = NO_UID_QUOTA_CHANGE;
1816 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1817 ogid = ngid = NO_GID_QUOTA_CHANGE;
1819 error = gfs2_rsqa_alloc(ip);
1823 error = gfs2_rindex_update(sdp);
1827 error = gfs2_quota_lock(ip, nuid, ngid);
1831 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1833 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1834 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1835 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1840 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1844 error = gfs2_setattr_simple(inode, attr);
1848 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1849 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1850 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1851 gfs2_quota_change(ip, ap.target, nuid, ngid);
1855 gfs2_trans_end(sdp);
1857 gfs2_quota_unlock(ip);
1863 * gfs2_setattr - Change attributes on an inode
1864 * @dentry: The dentry which is changing
1865 * @attr: The structure describing the change
1867 * The VFS layer wants to change one or more of an inodes attributes. Write
1868 * that change out to disk.
1873 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1875 struct inode *inode = d_inode(dentry);
1876 struct gfs2_inode *ip = GFS2_I(inode);
1877 struct gfs2_holder i_gh;
1880 error = gfs2_rsqa_alloc(ip);
1884 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1889 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1892 error = inode_change_ok(inode, attr);
1896 if (attr->ia_valid & ATTR_SIZE)
1897 error = gfs2_setattr_size(inode, attr->ia_size);
1898 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1899 error = setattr_chown(inode, attr);
1901 error = gfs2_setattr_simple(inode, attr);
1902 if (!error && attr->ia_valid & ATTR_MODE)
1903 error = posix_acl_chmod(inode, inode->i_mode);
1908 mark_inode_dirty(inode);
1909 gfs2_glock_dq_uninit(&i_gh);
1914 * gfs2_getattr - Read out an inode's attributes
1915 * @mnt: The vfsmount the inode is being accessed from
1916 * @dentry: The dentry to stat
1917 * @stat: The inode's stats
1919 * This may be called from the VFS directly, or from within GFS2 with the
1920 * inode locked, so we look to see if the glock is already locked and only
1921 * lock the glock if its not already been done. Note that its the NFS
1922 * readdirplus operation which causes this to be called (from filldir)
1923 * with the glock already held.
1928 static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
1931 struct inode *inode = d_inode(dentry);
1932 struct gfs2_inode *ip = GFS2_I(inode);
1933 struct gfs2_holder gh;
1937 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1938 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1944 generic_fillattr(inode, stat);
1946 gfs2_glock_dq_uninit(&gh);
1951 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1954 struct gfs2_inode *ip = GFS2_I(inode);
1955 struct gfs2_holder gh;
1958 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
1964 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
1968 if (gfs2_is_stuffed(ip)) {
1969 u64 phys = ip->i_no_addr << inode->i_blkbits;
1970 u64 size = i_size_read(inode);
1971 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
1972 FIEMAP_EXTENT_DATA_INLINE;
1973 phys += sizeof(struct gfs2_dinode);
1975 if (start + len > size)
1978 ret = fiemap_fill_next_extent(fieinfo, start, phys,
1983 ret = __generic_block_fiemap(inode, fieinfo, start, len,
1987 gfs2_glock_dq_uninit(&gh);
1989 inode_unlock(inode);
1993 const struct inode_operations gfs2_file_iops = {
1994 .permission = gfs2_permission,
1995 .setattr = gfs2_setattr,
1996 .getattr = gfs2_getattr,
1997 .setxattr = generic_setxattr,
1998 .getxattr = generic_getxattr,
1999 .listxattr = gfs2_listxattr,
2000 .removexattr = generic_removexattr,
2001 .fiemap = gfs2_fiemap,
2002 .get_acl = gfs2_get_acl,
2003 .set_acl = gfs2_set_acl,
2006 const struct inode_operations gfs2_dir_iops = {
2007 .create = gfs2_create,
2008 .lookup = gfs2_lookup,
2010 .unlink = gfs2_unlink,
2011 .symlink = gfs2_symlink,
2012 .mkdir = gfs2_mkdir,
2013 .rmdir = gfs2_unlink,
2014 .mknod = gfs2_mknod,
2015 .rename2 = gfs2_rename2,
2016 .permission = gfs2_permission,
2017 .setattr = gfs2_setattr,
2018 .getattr = gfs2_getattr,
2019 .setxattr = generic_setxattr,
2020 .getxattr = generic_getxattr,
2021 .listxattr = gfs2_listxattr,
2022 .removexattr = generic_removexattr,
2023 .fiemap = gfs2_fiemap,
2024 .get_acl = gfs2_get_acl,
2025 .set_acl = gfs2_set_acl,
2026 .atomic_open = gfs2_atomic_open,
2029 const struct inode_operations gfs2_symlink_iops = {
2030 .readlink = generic_readlink,
2031 .get_link = gfs2_get_link,
2032 .permission = gfs2_permission,
2033 .setattr = gfs2_setattr,
2034 .getattr = gfs2_getattr,
2035 .setxattr = generic_setxattr,
2036 .getxattr = generic_getxattr,
2037 .listxattr = gfs2_listxattr,
2038 .removexattr = generic_removexattr,
2039 .fiemap = gfs2_fiemap,