Switch gfs2 to nd_set_link()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 84350e1..4e64352 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -976,102 +976,11 @@
}
/**
- * gfs2_readlinki - return the contents of a symlink
- * @ip: the symlink's inode
- * @buf: a pointer to the buffer to be filled
- * @len: a pointer to the length of @buf
- *
- * If @buf is too small, a piece of memory is kmalloc()ed and needs
- * to be freed by the caller.
- *
- * Returns: errno
- */
-
-static int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
-{
- struct gfs2_holder i_gh;
- struct buffer_head *dibh;
- unsigned int x;
- int error;
-
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
- error = gfs2_glock_nq(&i_gh);
- if (error) {
- gfs2_holder_uninit(&i_gh);
- return error;
- }
-
- if (!ip->i_disksize) {
- gfs2_consist_inode(ip);
- error = -EIO;
- goto out;
- }
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto out;
-
- x = ip->i_disksize + 1;
- if (x > *len) {
- *buf = kmalloc(x, GFP_NOFS);
- if (!*buf) {
- error = -ENOMEM;
- goto out_brelse;
- }
- }
-
- memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
- *len = x;
-
-out_brelse:
- brelse(dibh);
-out:
- gfs2_glock_dq_uninit(&i_gh);
- return error;
-}
-
-/**
- * gfs2_readlink - Read the value of a symlink
- * @dentry: the symlink
- * @buf: the buffer to read the symlink data into
- * @size: the size of the buffer
- *
- * Returns: errno
- */
-
-static int gfs2_readlink(struct dentry *dentry, char __user *user_buf,
- int user_size)
-{
- struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
- char array[GFS2_FAST_NAME_SIZE], *buf = array;
- unsigned int len = GFS2_FAST_NAME_SIZE;
- int error;
-
- error = gfs2_readlinki(ip, &buf, &len);
- if (error)
- return error;
-
- if (user_size > len - 1)
- user_size = len - 1;
-
- if (copy_to_user(user_buf, buf, user_size))
- error = -EFAULT;
- else
- error = user_size;
-
- if (buf != array)
- kfree(buf);
-
- return error;
-}
-
-/**
* gfs2_follow_link - Follow a symbolic link
* @dentry: The dentry of the link
* @nd: Data that we pass to vfs_follow_link()
*
- * This can handle symlinks of any size. It is optimised for symlinks
- * under GFS2_FAST_NAME_SIZE.
+ * This can handle symlinks of any size.
*
* Returns: 0 on success or error code
*/
@@ -1079,19 +988,50 @@
static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
- char array[GFS2_FAST_NAME_SIZE], *buf = array;
- unsigned int len = GFS2_FAST_NAME_SIZE;
+ struct gfs2_holder i_gh;
+ struct buffer_head *dibh;
+ unsigned int x;
+ char *buf;
int error;
- error = gfs2_readlinki(ip, &buf, &len);
- if (!error) {
- error = vfs_follow_link(nd, buf);
- if (buf != array)
- kfree(buf);
- } else
- path_put(&nd->path);
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
+ error = gfs2_glock_nq(&i_gh);
+ if (error) {
+ gfs2_holder_uninit(&i_gh);
+ nd_set_link(nd, ERR_PTR(error));
+ return NULL;
+ }
- return ERR_PTR(error);
+ if (!ip->i_disksize) {
+ gfs2_consist_inode(ip);
+ buf = ERR_PTR(-EIO);
+ goto out;
+ }
+
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (error) {
+ buf = ERR_PTR(error);
+ goto out;
+ }
+
+ x = ip->i_disksize + 1;
+ buf = kmalloc(x, GFP_NOFS);
+ if (!buf)
+ buf = ERR_PTR(-ENOMEM);
+ else
+ memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
+ brelse(dibh);
+out:
+ gfs2_glock_dq_uninit(&i_gh);
+ nd_set_link(nd, buf);
+ return NULL;
+}
+
+static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
+{
+ char *s = nd_get_link(nd);
+ if (!IS_ERR(s))
+ kfree(s);
}
/**
@@ -1426,8 +1366,9 @@
};
const struct inode_operations gfs2_symlink_iops = {
- .readlink = gfs2_readlink,
+ .readlink = generic_readlink,
.follow_link = gfs2_follow_link,
+ .put_link = gfs2_put_link,
.permission = gfs2_permission,
.setattr = gfs2_setattr,
.getattr = gfs2_getattr,