diff options
| author | Jan Harkes <jaharkes@cs.cmu.edu> | 2007-07-21 04:37:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-21 17:49:14 -0700 |
| commit | d3fec424b23c47686efcf3f2004c3f1c1cee4d9c (patch) | |
| tree | ffad3cf369d35e85fca9a340347eea09caa53ff3 /include | |
| parent | b50731732f926d6c49fd0724616a7344c31cd5cf (diff) | |
coda: remove CODA_STORE/CODA_RELEASE upcalls
This is an variation on the patch sent by Christoph Hellwig which kills
file_count abuse by the Coda kernel module by moving the coda_flush
functionality into coda_release. However part of reason we were using the
coda_flush callback was to allow Coda to pass errors that occur during
writeback from the userspace cache manager back to close().
As Al Viro explained on linux-fsdevel, it is impossible to guarantee that
such errors can in fact be returned back to the caller. There are many
cases where the last reference to a file is not released by the close
system call and it is also impossible to pick some close as a 'last-close'
and delay it until all other references have been destroyed.
The CODA_STORE/CODA_RELEASE upcall combination is clearly a broken design,
and it is better to remove it completely.
Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@ftp.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/coda_linux.h | 1 | ||||
| -rw-r--r-- | include/linux/coda_psdev.h | 3 |
2 files changed, 0 insertions, 4 deletions
diff --git a/include/linux/coda_linux.h b/include/linux/coda_linux.h index c4079b403e9..1c47a34aa79 100644 --- a/include/linux/coda_linux.h +++ b/include/linux/coda_linux.h @@ -36,7 +36,6 @@ extern const struct file_operations coda_ioctl_operations; /* operations shared over more than one file */ int coda_open(struct inode *i, struct file *f); -int coda_flush(struct file *f, fl_owner_t id); int coda_release(struct inode *i, struct file *f); int coda_permission(struct inode *inode, int mask, struct nameidata *nd); int coda_revalidate_inode(struct dentry *); diff --git a/include/linux/coda_psdev.h b/include/linux/coda_psdev.h index aa8f454b3b7..07ae8f84605 100644 --- a/include/linux/coda_psdev.h +++ b/include/linux/coda_psdev.h @@ -33,9 +33,6 @@ int venus_setattr(struct super_block *, struct CodaFid *, struct coda_vattr *); int venus_lookup(struct super_block *sb, struct CodaFid *fid, const char *name, int length, int *type, struct CodaFid *resfid); -int venus_store(struct super_block *sb, struct CodaFid *fid, int flags, - vuid_t uid); -int venus_release(struct super_block *sb, struct CodaFid *fid, int flags); int venus_close(struct super_block *sb, struct CodaFid *fid, int flags, vuid_t uid); int venus_open(struct super_block *sb, struct CodaFid *fid, int flags, |