fs/affs: bugfix: make symbolic links work again

AFFS symbolic links were broken since kernel 2.6.29

Problem was bisected to the following

commit ebd09abbd969 ("vfs: ensure page symlinks are NUL-terminated")
commit 035146851cfa ("vfs: introduce helper function to safely
NUL-terminate symlinks")

AFFS wasn't setting inode size when reading symbolic link from disk or
creating a new one. Result was zero allocation in pagecache.

ln -s file symlink

ls -lrt

file
symlink ->

This patch adds inode isize information on inode get and symbolic link
addition.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/affs/inode.c b/fs/affs/inode.c
index abcc598..fd4ef3c 100644 (file)
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -140,6 +140,7 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
                inode->i_fop = &affs_file_operations;
                break;
        case ST_SOFTLINK:
+               inode->i_size = strlen((char *)AFFS_HEAD(bh)->table);
                inode->i_mode |= S_IFLNK;
                inode_nohighmem(inode);
                inode->i_op = &affs_symlink_inode_operations;

diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index 96dd1d0..b02da4d 100644 (file)
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -365,6 +365,7 @@ affs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
                                symname++;
        }
        *p = 0;
+       inode->i_size = i + 1;
        mark_buffer_dirty_inode(bh, inode);
        affs_brelse(bh);
        mark_inode_dirty(inode);