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| author | Miklos Szeredi <mszeredi@suse.cz> | 2007-10-18 03:07:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-18 14:37:30 -0700 |
| commit | d139d7ffd0c1e81e2a809909b4f8b121a0dc119a (patch) | |
| tree | e8c9dd746bfd8ae16d17596009608c4c1a153217 /include/linux/fs.h | |
| parent | 49d4914fd7c10ae846d0f30d5f6f4732cc68499c (diff) | |
| download | lwn-d139d7ffd0c1e81e2a809909b4f8b121a0dc119a.tar.gz lwn-d139d7ffd0c1e81e2a809909b4f8b121a0dc119a.zip | |
VFS: allow filesystems to implement atomic open+truncate
Add a new attribute flag ATTR_OPEN, with the meaning: "truncation was
initiated by open() due to the O_TRUNC flag".
This way filesystems wanting to implement truncation within their ->open()
method can ignore such truncate requests.
This is a quick & dirty hack, but it comes for free.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index e3fc5dbb2246..6a4d170ad9a5 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -330,6 +330,7 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset, #define ATTR_KILL_SGID 4096 #define ATTR_FILE 8192 #define ATTR_KILL_PRIV 16384 +#define ATTR_OPEN 32768 /* Truncating from open(O_TRUNC) */ /* * This is the Inode Attributes structure, used for notify_change(). It |