fs/reiserfs/xattr.c

67 static int xattr_create(struct inode *dir, struct dentry *dentry, int mode)
70 	return dir->i_op->create(&nop_mnt_idmap, dir, dentry, mode, true);
74 static int xattr_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
77 	return dir->i_op->mkdir(&nop_mnt_idmap, dir, dentry, mode);
86 static int xattr_unlink(struct inode *dir, struct dentry *dentry)
92 	inode_lock_nested(d_inode(dentry), I_MUTEX_CHILD);
93 	error = dir->i_op->unlink(dir, dentry);
94 	inode_unlock(d_inode(dentry));
97 		d_delete(dentry);
101 static int xattr_rmdir(struct inode *dir, struct dentry *dentry)
107 	inode_lock_nested(d_inode(dentry), I_MUTEX_CHILD);
108 	error = dir->i_op->rmdir(dir, dentry);
110 		d_inode(dentry)->i_flags |= S_DEAD;
111 	inode_unlock(d_inode(dentry));
113 		d_delete(dentry);
120 static struct dentry *open_xa_root(struct super_block *sb, int flags)
122 	struct dentry *privroot = REISERFS_SB(sb)->priv_root;
123 	struct dentry *xaroot;
148 static struct dentry *open_xa_dir(const struct inode *inode, int flags)
150 	struct dentry *xaroot, *xadir;
187 	struct dentry *xadir;
190 	struct dentry *dentries[8];
199 	struct dentry *dentry;
210 	dentry = lookup_one_len(name, dbuf->xadir, namelen);
211 	if (IS_ERR(dentry)) {
212 		dbuf->err = PTR_ERR(dentry);
214 	} else if (d_really_is_negative(dentry)) {
216 		reiserfs_error(dentry->d_sb, "xattr-20003",
219 			       dentry, dbuf->xadir);
220 		dput(dentry);
225 	dbuf->dentries[dbuf->count++] = dentry;
240 				   int (*action)(struct dentry *, void *),
243 	struct dentry *dir;
276 			struct dentry *dentry = buf.dentries[i];
278 			if (!d_is_dir(dentry))
279 				err = action(dentry, data);
281 			dput(dentry);
333 static int delete_one_xattr(struct dentry *dentry, void *data)
335 	struct inode *dir = d_inode(dentry->d_parent);
338 	if (d_is_dir(dentry))
339 		return xattr_rmdir(dir, dentry);
341 	return xattr_unlink(dir, dentry);
344 static int chown_one_xattr(struct dentry *dentry, void *data)
356 	err = reiserfs_setattr(&nop_mnt_idmap, dentry, attrs);
386  * Returns a dentry corresponding to a specific extended attribute file
388  * valid or negative dentry, or an error is returned.
390 static struct dentry *xattr_lookup(struct inode *inode, const char *name,
393 	struct dentry *xadir, *xafile;
482 	struct dentry *dentry, *xadir;
489 	dentry = lookup_one_len(name, xadir, strlen(name));
490 	if (IS_ERR(dentry)) {
491 		err = PTR_ERR(dentry);
495 	if (d_really_is_positive(dentry)) {
496 		err = xattr_unlink(d_inode(xadir), dentry);
500 	dput(dentry);
519 	struct dentry *dentry;
535 	dentry = xattr_lookup(inode, name, flags);
536 	if (IS_ERR(dentry))
537 		return PTR_ERR(dentry);
552 		page = reiserfs_get_page(d_inode(dentry), file_pos);
592 	if (!err && new_size < i_size_read(d_inode(dentry))) {
599 		inode_lock_nested(d_inode(dentry), I_MUTEX_XATTR);
600 		inode_dio_wait(d_inode(dentry));
602 		err = reiserfs_setattr(&nop_mnt_idmap, dentry, &newattrs);
603 		inode_unlock(d_inode(dentry));
608 	dput(dentry);
655 	struct dentry *dentry;
679 	dentry = xattr_lookup(inode, name, XATTR_REPLACE);
680 	if (IS_ERR(dentry)) {
681 		err = PTR_ERR(dentry);
687 	isize = i_size_read(d_inode(dentry));
710 		page = reiserfs_get_page(d_inode(dentry), file_pos);
755 	dput(dentry);
776 					   struct dentry *dentry)
779 	       IS_POSIXACL(d_backing_inode(dentry));
784 				       const char *name, struct dentry *dentry)
795 			if (!xattr_handler_can_list(xah, dentry))
802 	return reiserfs_posix_acl_list(name, dentry);
810 	struct dentry *dentry;
823 		if (!reiserfs_xattr_list(b->dentry->d_sb->s_xattr, name,
824 					 b->dentry))
847 ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
849 	struct dentry *dir;
853 		.dentry = dentry,
858 	if (d_really_is_negative(dentry))
861 	if (get_inode_sd_version(d_inode(dentry)) == STAT_DATA_V1)
864 	dir = open_xa_dir(d_inode(dentry), XATTR_REPLACE);
884 static int create_privroot(struct dentry *dentry)
887 	struct inode *inode = d_inode(dentry->d_parent);
891 	err = xattr_mkdir(inode, dentry, 0700);
892 	if (err || d_really_is_negative(dentry)) {
893 		reiserfs_warning(dentry->d_sb, "jdm-20006",
900 	reiserfs_init_priv_inode(d_inode(dentry));
901 	reiserfs_info(dentry->d_sb, "Created %s - reserved for xattr "
910 static int create_privroot(struct dentry *dentry) { return 0; }
961 static int xattr_hide_revalidate(struct dentry *dentry, unsigned int flags)
972 	struct dentry *dentry;
977 	dentry = lookup_one_len(PRIVROOT_NAME, s->s_root,
979 	if (!IS_ERR(dentry)) {
980 		REISERFS_SB(s)->priv_root = dentry;
981 		d_set_d_op(dentry, &xattr_lookup_poison_ops);
982 		if (d_really_is_positive(dentry))
983 			reiserfs_init_priv_inode(d_inode(dentry));
985 		err = PTR_ERR(dentry);
999 	struct dentry *privroot = REISERFS_SB(s)->priv_root;
1014 			struct dentry *dentry;
1016 			dentry = lookup_one_len(XAROOT_NAME, privroot,
1018 			if (!IS_ERR(dentry))
1019 				REISERFS_SB(s)->xattr_root = dentry;
1021 				err = PTR_ERR(dentry);