linux/3.2: add symlink xattr support to ubifs

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30794 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/generic/patches-3.2/550-ubifs-symlink-xattr-support.patch

@@ -0,0 +1,67 @@
+--- a/fs/ubifs/file.c
++++ b/fs/ubifs/file.c
+@@ -1575,6 +1575,12 @@ const struct inode_operations ubifs_syml
+ 	.follow_link = ubifs_follow_link,
+ 	.setattr     = ubifs_setattr,
+ 	.getattr     = ubifs_getattr,
++#ifdef CONFIG_UBIFS_FS_XATTR
++	.setxattr    = ubifs_setxattr,
++	.getxattr    = ubifs_getxattr,
++	.listxattr   = ubifs_listxattr,
++	.removexattr = ubifs_removexattr,
++#endif
+ };
+
+ const struct file_operations ubifs_file_operations = {
+--- a/fs/ubifs/journal.c
++++ b/fs/ubifs/journal.c
+@@ -553,7 +553,8 @@ int ubifs_jnl_update(struct ubifs_info *
+
+ 	dbg_jnl("ino %lu, dent '%.*s', data len %d in dir ino %lu",
+ 		inode->i_ino, nm->len, nm->name, ui->data_len, dir->i_ino);
+-	ubifs_assert(dir_ui->data_len == 0);
++	if (!xent)
++		ubifs_assert(dir_ui->data_len == 0);
+ 	ubifs_assert(mutex_is_locked(&dir_ui->ui_mutex));
+
+ 	dlen = UBIFS_DENT_NODE_SZ + nm->len + 1;
+@@ -573,6 +574,13 @@ int ubifs_jnl_update(struct ubifs_info *
+ 	aligned_dlen = ALIGN(dlen, 8);
+ 	aligned_ilen = ALIGN(ilen, 8);
+ 	len = aligned_dlen + aligned_ilen + UBIFS_INO_NODE_SZ;
++	if (xent) {
++		/*
++		 * Make sure to account for dir_ui->data_len in
++		 * length calculation in case there is extended attribute.
++		 */
++		len += dir_ui->data_len;
++	}
+ 	dent = kmalloc(len, GFP_NOFS);
+ 	if (!dent)
+ 		return -ENOMEM;
+@@ -649,7 +657,8 @@ int ubifs_jnl_update(struct ubifs_info *
+
+ 	ino_key_init(c, &ino_key, dir->i_ino);
+ 	ino_offs += aligned_ilen;
+-	err = ubifs_tnc_add(c, &ino_key, lnum, ino_offs, UBIFS_INO_NODE_SZ);
++	err = ubifs_tnc_add(c, &ino_key, lnum, ino_offs,
++			    UBIFS_INO_NODE_SZ + dir_ui->data_len);
+ 	if (err)
+ 		goto out_ro;
+
+--- a/fs/ubifs/xattr.c
++++ b/fs/ubifs/xattr.c
+@@ -211,12 +211,12 @@ static int change_xattr(struct ubifs_inf
+ 	}
+ 	memcpy(ui->data, value, size);
+ 	inode->i_size = ui->ui_size = size;
+-	ui->data_len = size;
+
+ 	mutex_lock(&host_ui->ui_mutex);
+ 	host->i_ctime = ubifs_current_time(host);
+ 	host_ui->xattr_size -= CALC_XATTR_BYTES(ui->data_len);
+ 	host_ui->xattr_size += CALC_XATTR_BYTES(size);
++	ui->data_len = size;
+
+ 	/*
+ 	 * It is important to write the host inode after the xattr inode