befs: split symlink iops in two - for short and long symlinks resp.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index e9c75e20db32d43b550506f5f8f62b2656f760e7..daa15d6ba45077755d2bc859cfffb44f6a82bfd0 100644 (file)
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -42,7 +42,7 @@ static void befs_destroy_inode(struct inode *inode);
 static int befs_init_inodecache(void);
 static void befs_destroy_inodecache(void);
 static void *befs_follow_link(struct dentry *, struct nameidata *);
-static void befs_put_link(struct dentry *, struct nameidata *, void *);
+static void *befs_fast_follow_link(struct dentry *, struct nameidata *);
 static int befs_utf2nls(struct super_block *sb, const char *in, int in_len,
                        char **out, int *out_len);
 static int befs_nls2utf(struct super_block *sb, const char *in, int in_len,
@@ -79,10 +79,15 @@ static const struct address_space_operations befs_aops = {
        .bmap           = befs_bmap,
 };
 
+static const struct inode_operations befs_fast_symlink_inode_operations = {
+       .readlink       = generic_readlink,
+       .follow_link    = befs_fast_follow_link,
+};
+
 static const struct inode_operations befs_symlink_inode_operations = {
        .readlink       = generic_readlink,
        .follow_link    = befs_follow_link,
-       .put_link       = befs_put_link,
+       .put_link       = kfree_put_link,
 };
 
 /* 
@@ -411,7 +416,10 @@ static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
                inode->i_op = &befs_dir_inode_operations;
                inode->i_fop = &befs_dir_operations;
        } else if (S_ISLNK(inode->i_mode)) {
-               inode->i_op = &befs_symlink_inode_operations;
+               if (befs_ino->i_flags & BEFS_LONG_SYMLINK)
+                       inode->i_op = &befs_symlink_inode_operations;
+               else
+                       inode->i_op = &befs_fast_symlink_inode_operations;
        } else {
                befs_error(sb, "Inode %lu is not a regular file, "
                           "directory or symlink. THAT IS WRONG! BeFS has no "
@@ -477,47 +485,40 @@ befs_destroy_inodecache(void)
 static void *
 befs_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
+       struct super_block *sb = dentry->d_sb;
        befs_inode_info *befs_ino = BEFS_I(dentry->d_inode);
+       befs_data_stream *data = &befs_ino->i_data.ds;
+       befs_off_t len = data->size;
        char *link;
 
-       if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
-               struct super_block *sb = dentry->d_sb;
-               befs_data_stream *data = &befs_ino->i_data.ds;
-               befs_off_t len = data->size;
+       if (len == 0) {
+               befs_error(sb, "Long symlink with illegal length");
+               link = ERR_PTR(-EIO);
+       } else {
+               befs_debug(sb, "Follow long symlink");
 
-               if (len == 0) {
-                       befs_error(sb, "Long symlink with illegal length");
+               link = kmalloc(len, GFP_NOFS);
+               if (!link) {
+                       link = ERR_PTR(-ENOMEM);
+               } else if (befs_read_lsymlink(sb, data, link, len) != len) {
+                       kfree(link);
+                       befs_error(sb, "Failed to read entire long symlink");
                        link = ERR_PTR(-EIO);
                } else {
-                       befs_debug(sb, "Follow long symlink");
-
-                       link = kmalloc(len, GFP_NOFS);
-                       if (!link) {
-                               link = ERR_PTR(-ENOMEM);
-                       } else if (befs_read_lsymlink(sb, data, link, len) != len) {
-                               kfree(link);
-                               befs_error(sb, "Failed to read entire long symlink");
-                               link = ERR_PTR(-EIO);
-                       } else {
-                               link[len - 1] = '\0';
-                       }
+                       link[len - 1] = '\0';
                }
-       } else {
-               link = befs_ino->i_data.symlink;
        }
-
        nd_set_link(nd, link);
        return NULL;
 }
 
-static void befs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
+
+static void *
+befs_fast_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
        befs_inode_info *befs_ino = BEFS_I(dentry->d_inode);
-       if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
-               char *link = nd_get_link(nd);
-               if (!IS_ERR(link))
-                       kfree(link);
-       }
+       nd_set_link(nd, befs_ino->i_data.symlink);
+       return NULL;
 }
 
 /*