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| author | Jan Kara <jack@suse.cz> | 2009-08-17 19:52:36 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2009-09-14 17:08:15 +0200 |
| commit | 148f948ba877f4d3cdef036b1ff6d9f68986706a (patch) | |
| tree | c07963f08bf8c2119ec00df64e4293e2e60acaa1 /fs/splice.c | |
| parent | eef99380679e20e7edc096aa4d8a98b875404d79 (diff) | |
| download | kernel_samsung_smdk4412-148f948ba877f4d3cdef036b1ff6d9f68986706a.zip kernel_samsung_smdk4412-148f948ba877f4d3cdef036b1ff6d9f68986706a.tar.gz kernel_samsung_smdk4412-148f948ba877f4d3cdef036b1ff6d9f68986706a.tar.bz2 | |
vfs: Introduce new helpers for syncing after writing to O_SYNC file or IS_SYNC inode
Introduce new function for generic inode syncing (vfs_fsync_range) and use
it from fsync() path. Introduce also new helper for syncing after a sync
write (generic_write_sync) using the generic function.
Use these new helpers for syncing from generic VFS functions. This makes
O_SYNC writes to block devices acquire i_mutex for syncing. If we really
care about this, we can make block_fsync() drop the i_mutex and reacquire
it before it returns.
CC: Evgeniy Polyakov <zbr@ioremap.net>
CC: ocfs2-devel@oss.oracle.com
CC: Joel Becker <joel.becker@oracle.com>
CC: Felix Blyakher <felixb@sgi.com>
CC: xfs@oss.sgi.com
CC: Anton Altaparmakov <aia21@cantab.net>
CC: linux-ntfs-dev@lists.sourceforge.net
CC: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
CC: linux-ext4@vger.kernel.org
CC: tytso@mit.edu
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/splice.c')
| -rw-r--r-- | fs/splice.c | 22 |
1 files changed, 6 insertions, 16 deletions
diff --git a/fs/splice.c b/fs/splice.c index 73766d2..8190237 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -976,25 +976,15 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out, if (ret > 0) { unsigned long nr_pages; + int err; - *ppos += ret; nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; - /* - * If file or inode is SYNC and we actually wrote some data, - * sync it. - */ - if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) { - int err; - - mutex_lock(&inode->i_mutex); - err = generic_osync_inode(inode, mapping, - OSYNC_METADATA|OSYNC_DATA); - mutex_unlock(&inode->i_mutex); - - if (err) - ret = err; - } + err = generic_write_sync(out, *ppos, ret); + if (err) + ret = err; + else + *ppos += ret; balance_dirty_pages_ratelimited_nr(mapping, nr_pages); } |