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| author | Mark Fasheh <mark.fasheh@oracle.com> | 2006-10-17 10:31:38 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@nelson.home.kernel.dk> | 2006-10-19 20:53:08 +0200 |
| commit | 62752ee198dca9209b7dee504763e51b11e9e0ca (patch) | |
| tree | 5e340a4c690851dadc3a8aa395e4c0d14b4837eb /include | |
| parent | ce9e3d9953c8cb67001719b5516da2928e956be4 (diff) | |
| download | kernel_samsung_smdk4412-62752ee198dca9209b7dee504763e51b11e9e0ca.zip kernel_samsung_smdk4412-62752ee198dca9209b7dee504763e51b11e9e0ca.tar.gz kernel_samsung_smdk4412-62752ee198dca9209b7dee504763e51b11e9e0ca.tar.bz2 | |
[PATCH] Take i_mutex in splice_from_pipe()
The splice_actor may be calling ->prepare_write() and ->commit_write(). We
want i_mutex on the inode being written to before calling those so that we
don't race i_size changes.
The double locking behavior is done elsewhere in splice.c, and if we
eventually want _nolock variants of generic_file_splice_write(), fs modules
might have to replicate the nasty locking code. We introduce
inode_double_lock() and inode_double_unlock() to consolidate the locking
rules into one set of functions.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 661c7c5..853a02f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -623,6 +623,9 @@ enum inode_i_mutex_lock_class I_MUTEX_QUOTA }; +extern void inode_double_lock(struct inode *inode1, struct inode *inode2); +extern void inode_double_unlock(struct inode *inode1, struct inode *inode2); + /* * NOTE: in a 32bit arch with a preemptable kernel and * an UP compile the i_size_read/write must be atomic |