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| author | Joel Becker <joel.becker@oracle.com> | 2010-02-09 17:52:13 -0800 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2010-02-26 15:41:18 -0800 |
| commit | e8fce482f3702c1ad27c97b26db5022aa1fa64c7 (patch) | |
| tree | 053d990d2e20a569021b2037a993700a58bc83e2 /fs/ocfs2 | |
| parent | 553b5eb91abd5f8e679d23ae547b92c589726814 (diff) | |
| download | lwn-e8fce482f3702c1ad27c97b26db5022aa1fa64c7.tar.gz lwn-e8fce482f3702c1ad27c97b26db5022aa1fa64c7.zip | |
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 <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2')
| -rw-r--r-- | fs/ocfs2/dlmfs/dlmfs.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index e21ce0e5fc42..13ac2bffb05d 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, |