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 gfs2_skip_data {
46 static int iget_test(struct inode *inode, void *opaque)
48 struct gfs2_inode *ip = GFS2_I(inode);
49 struct gfs2_skip_data *data = opaque;
51 if (ip->i_no_addr == data->no_addr) {
52 if (data->non_block &&
53 inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) {
62 static int iget_set(struct inode *inode, void *opaque)
64 struct gfs2_inode *ip = GFS2_I(inode);
65 struct gfs2_skip_data *data = opaque;
69 inode->i_ino = (unsigned long)(data->no_addr);
70 ip->i_no_addr = data->no_addr;
74 struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block)
76 unsigned long hash = (unsigned long)no_addr;
77 struct gfs2_skip_data data;
79 data.no_addr = no_addr;
81 data.non_block = non_block;
82 return ilookup5(sb, hash, iget_test, &data);
85 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr,
88 struct gfs2_skip_data data;
89 unsigned long hash = (unsigned long)no_addr;
91 data.no_addr = no_addr;
93 data.non_block = non_block;
94 return iget5_locked(sb, hash, iget_test, iget_set, &data);
98 * gfs2_set_iop - Sets inode operations
99 * @inode: The inode with correct i_mode filled in
101 * GFS2 lookup code fills in vfs inode contents based on info obtained
102 * from directory entry inside gfs2_inode_lookup().
105 static void gfs2_set_iop(struct inode *inode)
107 struct gfs2_sbd *sdp = GFS2_SB(inode);
108 umode_t mode = inode->i_mode;
111 inode->i_op = &gfs2_file_iops;
112 if (gfs2_localflocks(sdp))
113 inode->i_fop = &gfs2_file_fops_nolock;
115 inode->i_fop = &gfs2_file_fops;
116 } else if (S_ISDIR(mode)) {
117 inode->i_op = &gfs2_dir_iops;
118 if (gfs2_localflocks(sdp))
119 inode->i_fop = &gfs2_dir_fops_nolock;
121 inode->i_fop = &gfs2_dir_fops;
122 } else if (S_ISLNK(mode)) {
123 inode->i_op = &gfs2_symlink_iops;
125 inode->i_op = &gfs2_file_iops;
126 init_special_inode(inode, inode->i_mode, inode->i_rdev);
131 * gfs2_inode_lookup - Lookup an inode
132 * @sb: The super block
133 * @no_addr: The inode number
134 * @type: The type of the inode
135 * non_block: Can we block on inodes that are being freed?
137 * Returns: A VFS inode, or an error
140 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
141 u64 no_addr, u64 no_formal_ino, int non_block)
144 struct gfs2_inode *ip;
145 struct gfs2_glock *io_gl = NULL;
148 inode = gfs2_iget(sb, no_addr, non_block);
152 return ERR_PTR(-ENOMEM);
154 if (inode->i_state & I_NEW) {
155 struct gfs2_sbd *sdp = GFS2_SB(inode);
156 ip->i_no_formal_ino = no_formal_ino;
158 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
161 ip->i_gl->gl_object = ip;
163 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
167 set_bit(GIF_INVALID, &ip->i_flags);
168 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
172 ip->i_iopen_gh.gh_gl->gl_object = ip;
173 gfs2_glock_put(io_gl);
176 if (type == DT_UNKNOWN) {
177 /* Inode glock must be locked already */
178 error = gfs2_inode_refresh(GFS2_I(inode));
182 inode->i_mode = DT2IF(type);
186 unlock_new_inode(inode);
192 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
193 ip->i_iopen_gh.gh_gl->gl_object = NULL;
194 gfs2_glock_dq_wait(&ip->i_iopen_gh);
195 gfs2_holder_uninit(&ip->i_iopen_gh);
198 gfs2_glock_put(io_gl);
200 ip->i_gl->gl_object = NULL;
203 return ERR_PTR(error);
206 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
207 u64 *no_formal_ino, unsigned int blktype)
209 struct super_block *sb = sdp->sd_vfs;
210 struct gfs2_holder i_gh;
211 struct inode *inode = NULL;
214 /* Must not read in block until block type is verified */
215 error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops,
216 LM_ST_EXCLUSIVE, GL_SKIP, &i_gh);
218 return ERR_PTR(error);
220 error = gfs2_check_blk_type(sdp, no_addr, blktype);
224 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1);
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 gfs2_glock_dq_uninit(&i_gh);
243 return error ? ERR_PTR(error) : inode;
250 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
254 gfs2_str2qstr(&qstr, name);
255 inode = gfs2_lookupi(dip, &qstr, 1);
256 /* gfs2_lookupi has inconsistent callers: vfs
257 * related routines expect NULL for no entry found,
258 * gfs2_lookup_simple callers expect ENOENT
259 * and do not check for NULL.
262 return ERR_PTR(-ENOENT);
269 * gfs2_lookupi - Look up a filename in a directory and return its inode
270 * @d_gh: An initialized holder for the directory glock
271 * @name: The name of the inode to look for
272 * @is_root: If 1, ignore the caller's permissions
273 * @i_gh: An uninitialized holder for the new inode glock
275 * This can be called via the VFS filldir function when NFS is doing
276 * a readdirplus and the inode which its intending to stat isn't
277 * already in cache. In this case we must not take the directory glock
278 * again, since the readdir call will have already taken that lock.
283 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
286 struct super_block *sb = dir->i_sb;
287 struct gfs2_inode *dip = GFS2_I(dir);
288 struct gfs2_holder d_gh;
290 struct inode *inode = NULL;
293 if (!name->len || name->len > GFS2_FNAMESIZE)
294 return ERR_PTR(-ENAMETOOLONG);
296 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
297 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
298 dir == d_inode(sb->s_root))) {
303 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
304 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
306 return ERR_PTR(error);
311 error = gfs2_permission(dir, MAY_EXEC);
316 inode = gfs2_dir_search(dir, name, false);
318 error = PTR_ERR(inode);
321 gfs2_glock_dq_uninit(&d_gh);
322 if (error == -ENOENT)
324 return inode ? inode : ERR_PTR(error);
328 * create_ok - OK to create a new on-disk inode here?
329 * @dip: Directory in which dinode is to be created
330 * @name: Name of new dinode
336 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
341 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
345 /* Don't create entries in an unlinked directory */
346 if (!dip->i_inode.i_nlink)
349 if (dip->i_entries == (u32)-1)
351 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
357 static void munge_mode_uid_gid(const struct gfs2_inode *dip,
360 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
361 (dip->i_inode.i_mode & S_ISUID) &&
362 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
363 if (S_ISDIR(inode->i_mode))
364 inode->i_mode |= S_ISUID;
365 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
366 inode->i_mode &= ~07111;
367 inode->i_uid = dip->i_inode.i_uid;
369 inode->i_uid = current_fsuid();
371 if (dip->i_inode.i_mode & S_ISGID) {
372 if (S_ISDIR(inode->i_mode))
373 inode->i_mode |= S_ISGID;
374 inode->i_gid = dip->i_inode.i_gid;
376 inode->i_gid = current_fsgid();
379 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
381 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
382 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
385 error = gfs2_quota_lock_check(ip, &ap);
389 error = gfs2_inplace_reserve(ip, &ap);
393 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
397 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
398 ip->i_no_formal_ino = ip->i_generation;
399 ip->i_inode.i_ino = ip->i_no_addr;
400 ip->i_goal = ip->i_no_addr;
405 gfs2_inplace_release(ip);
407 gfs2_quota_unlock(ip);
412 static void gfs2_init_dir(struct buffer_head *dibh,
413 const struct gfs2_inode *parent)
415 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
416 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
418 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
419 dent->de_inum = di->di_num; /* already GFS2 endian */
420 dent->de_type = cpu_to_be16(DT_DIR);
422 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
423 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
424 gfs2_inum_out(parent, dent);
425 dent->de_type = cpu_to_be16(DT_DIR);
430 * gfs2_init_xattr - Initialise an xattr block for a new inode
431 * @ip: The inode in question
433 * This sets up an empty xattr block for a new inode, ready to
434 * take any ACLs, LSM xattrs, etc.
437 static void gfs2_init_xattr(struct gfs2_inode *ip)
439 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
440 struct buffer_head *bh;
441 struct gfs2_ea_header *ea;
443 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
444 gfs2_trans_add_meta(ip->i_gl, bh);
445 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
446 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
448 ea = GFS2_EA_BH2FIRST(bh);
449 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
450 ea->ea_type = GFS2_EATYPE_UNUSED;
451 ea->ea_flags = GFS2_EAFLAG_LAST;
457 * init_dinode - Fill in a new dinode structure
458 * @dip: The directory this inode is being created in
460 * @symname: The symlink destination (if a symlink)
461 * @bhp: The buffer head (returned to caller)
465 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
468 struct gfs2_dinode *di;
469 struct buffer_head *dibh;
471 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
472 gfs2_trans_add_meta(ip->i_gl, dibh);
473 di = (struct gfs2_dinode *)dibh->b_data;
474 gfs2_dinode_out(ip, di);
476 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
477 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
481 memset(&di->__pad4, 0, sizeof(di->__pad4));
482 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
483 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
485 switch(ip->i_inode.i_mode & S_IFMT) {
487 gfs2_init_dir(dibh, dip);
490 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
494 set_buffer_uptodate(dibh);
499 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
500 * @dip: The directory we are linking into
501 * @da: The dir add information
502 * @nr_inodes: The number of inodes involved
504 * This calculate the number of blocks we need to reserve in a
505 * transaction to link @nr_inodes into a directory. In most cases
506 * @nr_inodes will be 2 (the directory plus the inode being linked in)
507 * but in case of rename, 4 may be required.
509 * Returns: Number of blocks
512 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
513 const struct gfs2_diradd *da,
516 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
517 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
520 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
521 struct gfs2_inode *ip, struct gfs2_diradd *da)
523 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
524 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
528 error = gfs2_quota_lock_check(dip, &ap);
530 goto fail_quota_locks;
532 error = gfs2_inplace_reserve(dip, &ap);
534 goto fail_quota_locks;
536 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
540 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
542 goto fail_quota_locks;
545 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
549 gfs2_inplace_release(dip);
551 gfs2_quota_unlock(dip);
555 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
558 const struct xattr *xattr;
561 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
562 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
564 GFS2_EATYPE_SECURITY);
572 * gfs2_create_inode - Create a new inode
573 * @dir: The parent directory
574 * @dentry: The new dentry
575 * @file: If non-NULL, the file which is being opened
576 * @mode: The permissions on the new inode
577 * @dev: For device nodes, this is the device number
578 * @symname: For symlinks, this is the link destination
579 * @size: The initial size of the inode (ignored for directories)
581 * Returns: 0 on success, or error code
584 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
586 umode_t mode, dev_t dev, const char *symname,
587 unsigned int size, int excl, int *opened)
589 const struct qstr *name = &dentry->d_name;
590 struct posix_acl *default_acl, *acl;
591 struct gfs2_holder ghs[2];
592 struct inode *inode = NULL;
593 struct gfs2_inode *dip = GFS2_I(dir), *ip;
594 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
595 struct gfs2_glock *io_gl = NULL;
596 int error, free_vfs_inode = 1;
599 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
601 if (!name->len || name->len > GFS2_FNAMESIZE)
602 return -ENAMETOOLONG;
604 error = gfs2_rsqa_alloc(dip);
608 error = gfs2_rindex_update(sdp);
612 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
616 error = create_ok(dip, name, mode);
620 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
621 error = PTR_ERR(inode);
622 if (!IS_ERR(inode)) {
623 if (S_ISDIR(inode->i_mode)) {
625 inode = ERR_PTR(-EISDIR);
628 d_instantiate(dentry, inode);
631 if (S_ISREG(inode->i_mode))
632 error = finish_open(file, dentry, gfs2_open_common, opened);
634 error = finish_no_open(file, NULL);
636 gfs2_glock_dq_uninit(ghs);
638 } else if (error != -ENOENT) {
642 error = gfs2_diradd_alloc_required(dir, name, &da);
646 inode = new_inode(sdp->sd_vfs);
651 error = posix_acl_create(dir, &mode, &default_acl, &acl);
656 error = gfs2_rsqa_alloc(ip);
660 inode->i_mode = mode;
661 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
663 inode->i_size = size;
664 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
665 gfs2_set_inode_blocks(inode, 1);
666 munge_mode_uid_gid(dip, inode);
667 check_and_update_goal(dip);
668 ip->i_goal = dip->i_goal;
675 switch(mode & S_IFMT) {
677 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
678 gfs2_tune_get(sdp, gt_new_files_jdata))
679 ip->i_diskflags |= GFS2_DIF_JDATA;
680 gfs2_set_aops(inode);
683 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
684 ip->i_diskflags |= GFS2_DIF_JDATA;
689 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
690 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
691 ip->i_diskflags |= GFS2_DIF_SYSTEM;
693 gfs2_set_inode_flags(inode);
695 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
696 (dip->i_diskflags & GFS2_DIF_TOPDIR))
697 aflags |= GFS2_AF_ORLOV;
699 if (default_acl || acl)
702 error = alloc_dinode(ip, aflags, &blocks);
704 goto fail_free_inode;
706 gfs2_set_inode_blocks(inode, blocks);
708 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
710 goto fail_free_inode;
712 ip->i_gl->gl_object = ip;
713 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
715 goto fail_free_inode;
717 error = gfs2_trans_begin(sdp, blocks, 0);
722 ip->i_eattr = ip->i_no_addr + 1;
725 init_dinode(dip, ip, symname);
728 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
732 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
734 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
738 ip->i_iopen_gh.gh_gl->gl_object = ip;
739 gfs2_glock_put(io_gl);
741 insert_inode_hash(inode);
743 free_vfs_inode = 0; /* After this point, the inode is no longer
744 considered free. Any failures need to undo
745 the gfs2 structures. */
747 error = gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
748 posix_acl_release(default_acl);
752 error = gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
753 posix_acl_release(acl);
759 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
760 &gfs2_initxattrs, NULL);
764 error = link_dinode(dip, name, ip, &da);
768 mark_inode_dirty(inode);
769 d_instantiate(dentry, inode);
771 *opened |= FILE_CREATED;
772 error = finish_open(file, dentry, gfs2_open_common, opened);
774 gfs2_glock_dq_uninit(ghs);
775 gfs2_glock_dq_uninit(ghs + 1);
776 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
780 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
781 gfs2_glock_put(io_gl);
784 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
785 gfs2_glock_dq_uninit(ghs + 1);
788 gfs2_glock_put(ip->i_gl);
789 gfs2_rsqa_delete(ip, NULL);
792 posix_acl_release(default_acl);
794 posix_acl_release(acl);
796 gfs2_dir_no_add(&da);
797 gfs2_glock_dq_uninit(ghs);
798 if (inode && !IS_ERR(inode)) {
801 mark_inode_dirty(inode);
802 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
803 &GFS2_I(inode)->i_flags);
811 * gfs2_create - Create a file
812 * @dir: The directory in which to create the file
813 * @dentry: The dentry of the new file
814 * @mode: The mode of the new file
819 static int gfs2_create(struct inode *dir, struct dentry *dentry,
820 umode_t mode, bool excl)
822 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL);
826 * __gfs2_lookup - Look up a filename in a directory and return its inode
827 * @dir: The directory inode
828 * @dentry: The dentry of the new inode
829 * @file: File to be opened
830 * @opened: atomic_open flags
836 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
837 struct file *file, int *opened)
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, opened);
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, 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;
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;
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);
1157 gfs2_trans_end(sdp);
1159 gfs2_glock_dq(ghs + 2);
1161 gfs2_glock_dq(ghs + 1);
1165 gfs2_holder_uninit(ghs + 2);
1167 gfs2_holder_uninit(ghs + 1);
1168 gfs2_holder_uninit(ghs);
1173 * gfs2_symlink - Create a symlink
1174 * @dir: The directory to create the symlink in
1175 * @dentry: The dentry to put the symlink in
1176 * @symname: The thing which the link points to
1181 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1182 const char *symname)
1184 struct gfs2_sbd *sdp = GFS2_SB(dir);
1187 size = strlen(symname);
1188 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
1189 return -ENAMETOOLONG;
1191 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL);
1195 * gfs2_mkdir - Make a directory
1196 * @dir: The parent directory of the new one
1197 * @dentry: The dentry of the new directory
1198 * @mode: The mode of the new directory
1203 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1205 struct gfs2_sbd *sdp = GFS2_SB(dir);
1206 unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
1207 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL);
1211 * gfs2_mknod - Make a special file
1212 * @dir: The directory in which the special file will reside
1213 * @dentry: The dentry of the special file
1214 * @mode: The mode of the special file
1215 * @dev: The device specification of the special file
1219 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1222 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL);
1226 * gfs2_atomic_open - Atomically open a file
1227 * @dir: The directory
1228 * @dentry: The proposed new entry
1229 * @file: The proposed new struct file
1230 * @flags: open flags
1232 * @opened: Flag to say whether the file has been opened or not
1234 * Returns: error code or 0 for success
1237 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1238 struct file *file, unsigned flags,
1239 umode_t mode, int *opened)
1242 bool excl = !!(flags & O_EXCL);
1244 if (!d_unhashed(dentry))
1247 d = __gfs2_lookup(dir, dentry, file, opened);
1252 if (d_really_is_positive(dentry)) {
1253 if (!(*opened & FILE_OPENED))
1254 return finish_no_open(file, d);
1262 if (!(flags & O_CREAT))
1265 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened);
1269 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1273 * Follow @to back to the root and make sure we don't encounter @this
1274 * Assumes we already hold the rename lock.
1279 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1281 struct inode *dir = &to->i_inode;
1282 struct super_block *sb = dir->i_sb;
1289 if (dir == &this->i_inode) {
1293 if (dir == d_inode(sb->s_root)) {
1298 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1304 error = PTR_ERR(tmp);
1318 * update_moved_ino - Update an inode that's being moved
1319 * @ip: The inode being moved
1320 * @ndip: The parent directory of the new filename
1321 * @dir_rename: True of ip is a directory
1326 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1330 struct buffer_head *dibh;
1333 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1335 error = gfs2_meta_inode_buffer(ip, &dibh);
1338 ip->i_inode.i_ctime = CURRENT_TIME;
1339 gfs2_trans_add_meta(ip->i_gl, dibh);
1340 gfs2_dinode_out(ip, dibh->b_data);
1347 * gfs2_rename - Rename a file
1348 * @odir: Parent directory of old file name
1349 * @odentry: The old dentry of the file
1350 * @ndir: Parent directory of new file name
1351 * @ndentry: The new dentry of the file
1356 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1357 struct inode *ndir, struct dentry *ndentry)
1359 struct gfs2_inode *odip = GFS2_I(odir);
1360 struct gfs2_inode *ndip = GFS2_I(ndir);
1361 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1362 struct gfs2_inode *nip = NULL;
1363 struct gfs2_sbd *sdp = GFS2_SB(odir);
1364 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
1365 struct gfs2_rgrpd *nrgd;
1366 unsigned int num_gh;
1368 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1372 if (d_really_is_positive(ndentry)) {
1373 nip = GFS2_I(d_inode(ndentry));
1378 error = gfs2_rindex_update(sdp);
1382 error = gfs2_rsqa_alloc(ndip);
1387 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1392 if (S_ISDIR(ip->i_inode.i_mode)) {
1394 /* don't move a directory into its subdir */
1395 error = gfs2_ok_to_move(ip, ndip);
1402 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1404 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1407 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1411 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1413 /* grab the resource lock for unlink flag twiddling
1414 * this is the case of the target file already existing
1415 * so we unlink before doing the rename
1417 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1419 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
1422 for (x = 0; x < num_gh; x++) {
1423 error = gfs2_glock_nq(ghs + x);
1429 if (ip->i_inode.i_nlink == 0)
1432 /* Check out the old directory */
1434 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1438 /* Check out the new directory */
1441 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1445 if (nip->i_inode.i_nlink == 0) {
1450 if (S_ISDIR(nip->i_inode.i_mode)) {
1451 if (nip->i_entries < 2) {
1452 gfs2_consist_inode(nip);
1456 if (nip->i_entries > 2) {
1462 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1466 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1478 if (!ndip->i_inode.i_nlink) {
1482 if (ndip->i_entries == (u32)-1) {
1486 if (S_ISDIR(ip->i_inode.i_mode) &&
1487 ndip->i_inode.i_nlink == (u32)-1) {
1494 /* Check out the dir to be renamed */
1497 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1503 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1509 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1510 error = gfs2_quota_lock_check(ndip, &ap);
1514 error = gfs2_inplace_reserve(ndip, &ap);
1518 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1519 4 * RES_LEAF + 4, 0);
1523 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1524 5 * RES_LEAF + 4, 0);
1529 /* Remove the target file, if it exists */
1532 error = gfs2_unlink_inode(ndip, ndentry);
1534 error = update_moved_ino(ip, ndip, dir_rename);
1538 error = gfs2_dir_del(odip, odentry);
1542 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1547 gfs2_trans_end(sdp);
1550 gfs2_inplace_release(ndip);
1553 gfs2_quota_unlock(ndip);
1555 gfs2_dir_no_add(&da);
1557 gfs2_glock_dq(ghs + x);
1558 gfs2_holder_uninit(ghs + x);
1562 gfs2_glock_dq_uninit(&r_gh);
1568 * gfs2_exchange - exchange two files
1569 * @odir: Parent directory of old file name
1570 * @odentry: The old dentry of the file
1571 * @ndir: Parent directory of new file name
1572 * @ndentry: The new dentry of the file
1573 * @flags: The rename flags
1578 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1579 struct inode *ndir, struct dentry *ndentry,
1582 struct gfs2_inode *odip = GFS2_I(odir);
1583 struct gfs2_inode *ndip = GFS2_I(ndir);
1584 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1585 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1586 struct gfs2_sbd *sdp = GFS2_SB(odir);
1587 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
1588 unsigned int num_gh;
1590 umode_t old_mode = oip->i_inode.i_mode;
1591 umode_t new_mode = nip->i_inode.i_mode;
1594 error = gfs2_rindex_update(sdp);
1599 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1604 if (S_ISDIR(old_mode)) {
1605 /* don't move a directory into its subdir */
1606 error = gfs2_ok_to_move(oip, ndip);
1611 if (S_ISDIR(new_mode)) {
1612 /* don't move a directory into its subdir */
1613 error = gfs2_ok_to_move(nip, odip);
1620 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1622 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1625 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1628 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1631 for (x = 0; x < num_gh; x++) {
1632 error = gfs2_glock_nq(ghs + x);
1638 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1641 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1644 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1648 if (S_ISDIR(old_mode)) {
1649 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1653 if (S_ISDIR(new_mode)) {
1654 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1658 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1662 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1666 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1670 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1675 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1681 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1682 inc_nlink(&odip->i_inode);
1683 drop_nlink(&ndip->i_inode);
1684 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1685 inc_nlink(&ndip->i_inode);
1686 drop_nlink(&odip->i_inode);
1689 mark_inode_dirty(&ndip->i_inode);
1691 mark_inode_dirty(&odip->i_inode);
1694 gfs2_trans_end(sdp);
1697 gfs2_glock_dq(ghs + x);
1698 gfs2_holder_uninit(ghs + x);
1702 gfs2_glock_dq_uninit(&r_gh);
1707 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1708 struct inode *ndir, struct dentry *ndentry,
1711 flags &= ~RENAME_NOREPLACE;
1713 if (flags & ~RENAME_EXCHANGE)
1716 if (flags & RENAME_EXCHANGE)
1717 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1719 return gfs2_rename(odir, odentry, ndir, ndentry);
1723 * gfs2_get_link - Follow a symbolic link
1724 * @dentry: The dentry of the link
1725 * @inode: The inode of the link
1726 * @done: destructor for return value
1728 * This can handle symlinks of any size.
1730 * Returns: 0 on success or error code
1733 static const char *gfs2_get_link(struct dentry *dentry,
1734 struct inode *inode,
1735 struct delayed_call *done)
1737 struct gfs2_inode *ip = GFS2_I(inode);
1738 struct gfs2_holder i_gh;
1739 struct buffer_head *dibh;
1745 return ERR_PTR(-ECHILD);
1747 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1748 error = gfs2_glock_nq(&i_gh);
1750 gfs2_holder_uninit(&i_gh);
1751 return ERR_PTR(error);
1754 size = (unsigned int)i_size_read(&ip->i_inode);
1756 gfs2_consist_inode(ip);
1757 buf = ERR_PTR(-EIO);
1761 error = gfs2_meta_inode_buffer(ip, &dibh);
1763 buf = ERR_PTR(error);
1767 buf = kzalloc(size + 1, GFP_NOFS);
1769 buf = ERR_PTR(-ENOMEM);
1771 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1774 gfs2_glock_dq_uninit(&i_gh);
1776 set_delayed_call(done, kfree_link, buf);
1783 * @mask: The mask to be tested
1784 * @flags: Indicates whether this is an RCU path walk or not
1786 * This may be called from the VFS directly, or from within GFS2 with the
1787 * inode locked, so we look to see if the glock is already locked and only
1788 * lock the glock if its not already been done.
1793 int gfs2_permission(struct inode *inode, int mask)
1795 struct gfs2_inode *ip;
1796 struct gfs2_holder i_gh;
1802 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1803 if (mask & MAY_NOT_BLOCK)
1805 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1811 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1814 error = generic_permission(inode, mask);
1816 gfs2_glock_dq_uninit(&i_gh);
1821 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1823 setattr_copy(inode, attr);
1824 mark_inode_dirty(inode);
1829 * gfs2_setattr_simple -
1836 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1840 if (current->journal_info)
1841 return __gfs2_setattr_simple(inode, attr);
1843 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1847 error = __gfs2_setattr_simple(inode, attr);
1848 gfs2_trans_end(GFS2_SB(inode));
1852 static int setattr_chown(struct inode *inode, struct iattr *attr)
1854 struct gfs2_inode *ip = GFS2_I(inode);
1855 struct gfs2_sbd *sdp = GFS2_SB(inode);
1859 struct gfs2_alloc_parms ap;
1861 ouid = inode->i_uid;
1862 ogid = inode->i_gid;
1863 nuid = attr->ia_uid;
1864 ngid = attr->ia_gid;
1866 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1867 ouid = nuid = NO_UID_QUOTA_CHANGE;
1868 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1869 ogid = ngid = NO_GID_QUOTA_CHANGE;
1871 error = gfs2_rsqa_alloc(ip);
1875 error = gfs2_rindex_update(sdp);
1879 error = gfs2_quota_lock(ip, nuid, ngid);
1883 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1885 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1886 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1887 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1892 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1896 error = gfs2_setattr_simple(inode, attr);
1900 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1901 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1902 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1903 gfs2_quota_change(ip, ap.target, nuid, ngid);
1907 gfs2_trans_end(sdp);
1909 gfs2_quota_unlock(ip);
1915 * gfs2_setattr - Change attributes on an inode
1916 * @dentry: The dentry which is changing
1917 * @attr: The structure describing the change
1919 * The VFS layer wants to change one or more of an inodes attributes. Write
1920 * that change out to disk.
1925 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1927 struct inode *inode = d_inode(dentry);
1928 struct gfs2_inode *ip = GFS2_I(inode);
1929 struct gfs2_holder i_gh;
1932 error = gfs2_rsqa_alloc(ip);
1936 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1941 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1944 error = inode_change_ok(inode, attr);
1948 if (attr->ia_valid & ATTR_SIZE)
1949 error = gfs2_setattr_size(inode, attr->ia_size);
1950 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1951 error = setattr_chown(inode, attr);
1953 error = gfs2_setattr_simple(inode, attr);
1954 if (!error && attr->ia_valid & ATTR_MODE)
1955 error = posix_acl_chmod(inode, inode->i_mode);
1960 mark_inode_dirty(inode);
1961 gfs2_glock_dq_uninit(&i_gh);
1966 * gfs2_getattr - Read out an inode's attributes
1967 * @mnt: The vfsmount the inode is being accessed from
1968 * @dentry: The dentry to stat
1969 * @stat: The inode's stats
1971 * This may be called from the VFS directly, or from within GFS2 with the
1972 * inode locked, so we look to see if the glock is already locked and only
1973 * lock the glock if its not already been done. Note that its the NFS
1974 * readdirplus operation which causes this to be called (from filldir)
1975 * with the glock already held.
1980 static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
1983 struct inode *inode = d_inode(dentry);
1984 struct gfs2_inode *ip = GFS2_I(inode);
1985 struct gfs2_holder gh;
1989 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1990 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1996 generic_fillattr(inode, stat);
1998 gfs2_glock_dq_uninit(&gh);
2003 static int gfs2_setxattr(struct dentry *dentry, const char *name,
2004 const void *data, size_t size, int flags)
2006 struct inode *inode = d_inode(dentry);
2007 struct gfs2_inode *ip = GFS2_I(inode);
2008 struct gfs2_holder gh;
2011 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
2012 ret = gfs2_glock_nq(&gh);
2014 ret = gfs2_rsqa_alloc(ip);
2016 ret = generic_setxattr(dentry, name, data, size, flags);
2019 gfs2_holder_uninit(&gh);
2023 static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
2024 void *data, size_t size)
2026 struct inode *inode = d_inode(dentry);
2027 struct gfs2_inode *ip = GFS2_I(inode);
2028 struct gfs2_holder gh;
2031 /* For selinux during lookup */
2032 if (gfs2_glock_is_locked_by_me(ip->i_gl))
2033 return generic_getxattr(dentry, name, data, size);
2035 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
2036 ret = gfs2_glock_nq(&gh);
2038 ret = generic_getxattr(dentry, name, data, size);
2041 gfs2_holder_uninit(&gh);
2045 static int gfs2_removexattr(struct dentry *dentry, const char *name)
2047 struct inode *inode = d_inode(dentry);
2048 struct gfs2_inode *ip = GFS2_I(inode);
2049 struct gfs2_holder gh;
2052 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
2053 ret = gfs2_glock_nq(&gh);
2055 ret = gfs2_rsqa_alloc(ip);
2057 ret = generic_removexattr(dentry, name);
2060 gfs2_holder_uninit(&gh);
2064 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2067 struct gfs2_inode *ip = GFS2_I(inode);
2068 struct gfs2_holder gh;
2071 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
2077 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2081 if (gfs2_is_stuffed(ip)) {
2082 u64 phys = ip->i_no_addr << inode->i_blkbits;
2083 u64 size = i_size_read(inode);
2084 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
2085 FIEMAP_EXTENT_DATA_INLINE;
2086 phys += sizeof(struct gfs2_dinode);
2088 if (start + len > size)
2091 ret = fiemap_fill_next_extent(fieinfo, start, phys,
2096 ret = __generic_block_fiemap(inode, fieinfo, start, len,
2100 gfs2_glock_dq_uninit(&gh);
2102 inode_unlock(inode);
2106 const struct inode_operations gfs2_file_iops = {
2107 .permission = gfs2_permission,
2108 .setattr = gfs2_setattr,
2109 .getattr = gfs2_getattr,
2110 .setxattr = gfs2_setxattr,
2111 .getxattr = gfs2_getxattr,
2112 .listxattr = gfs2_listxattr,
2113 .removexattr = gfs2_removexattr,
2114 .fiemap = gfs2_fiemap,
2115 .get_acl = gfs2_get_acl,
2116 .set_acl = gfs2_set_acl,
2119 const struct inode_operations gfs2_dir_iops = {
2120 .create = gfs2_create,
2121 .lookup = gfs2_lookup,
2123 .unlink = gfs2_unlink,
2124 .symlink = gfs2_symlink,
2125 .mkdir = gfs2_mkdir,
2126 .rmdir = gfs2_unlink,
2127 .mknod = gfs2_mknod,
2128 .rename2 = gfs2_rename2,
2129 .permission = gfs2_permission,
2130 .setattr = gfs2_setattr,
2131 .getattr = gfs2_getattr,
2132 .setxattr = gfs2_setxattr,
2133 .getxattr = gfs2_getxattr,
2134 .listxattr = gfs2_listxattr,
2135 .removexattr = gfs2_removexattr,
2136 .fiemap = gfs2_fiemap,
2137 .get_acl = gfs2_get_acl,
2138 .set_acl = gfs2_set_acl,
2139 .atomic_open = gfs2_atomic_open,
2142 const struct inode_operations gfs2_symlink_iops = {
2143 .readlink = generic_readlink,
2144 .get_link = gfs2_get_link,
2145 .permission = gfs2_permission,
2146 .setattr = gfs2_setattr,
2147 .getattr = gfs2_getattr,
2148 .setxattr = gfs2_setxattr,
2149 .getxattr = gfs2_getxattr,
2150 .listxattr = gfs2_listxattr,
2151 .removexattr = gfs2_removexattr,
2152 .fiemap = gfs2_fiemap,