From e8fce482f3702c1ad27c97b26db5022aa1fa64c7 Mon Sep 17 00:00:00 2001 From: Joel Becker Date: Tue, 9 Feb 2010 17:52:13 -0800 Subject: ocfs2_dlmfs: Don't honor truncate. The size of a dlmfs file is LVB_LEN We want folks using dlmfs to be able to use the LVB in places other than just write(2)/read(2). By ignoring truncate requests, we allow 'echo "contents" > /dlm/space/lockname' to work. Signed-off-by: Joel Becker --- fs/ocfs2/dlmfs/dlmfs.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'fs/ocfs2') diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index e21ce0e5fc4..13ac2bffb05 100644 --- a/fs/ocfs2/dlmfs/dlmfs.c +++ b/fs/ocfs2/dlmfs/dlmfs.c @@ -220,6 +220,23 @@ static int dlmfs_file_release(struct inode *inode, return 0; } +/* + * We do ->setattr() just to override size changes. Our size is the size + * of the LVB and nothing else. + */ +static int dlmfs_file_setattr(struct dentry *dentry, struct iattr *attr) +{ + int error; + struct inode *inode = dentry->d_inode; + + attr->ia_valid &= ~ATTR_SIZE; + error = inode_change_ok(inode, attr); + if (!error) + error = inode_setattr(inode, attr); + + return error; +} + static unsigned int dlmfs_file_poll(struct file *file, poll_table *wait) { int event = 0; @@ -634,6 +651,7 @@ static const struct super_operations dlmfs_ops = { static const struct inode_operations dlmfs_file_inode_operations = { .getattr = simple_getattr, + .setattr = dlmfs_file_setattr, }; static int dlmfs_get_sb(struct file_system_type *fs_type, -- cgit v1.2.3