diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2014-04-05 04:27:08 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-06-12 00:18:51 -0400 |
| commit | 8d0207652cbe27d1f962050737848e5ad4671958 (patch) | |
| tree | 2cd92ec3cfc66cdfd3cff1b4a46f1b5a4f4b8197 /fs/xfs | |
| parent | 62a8067a7f35dba2de501c9cb00e4cf36da90bc0 (diff) | |
->splice_write() via ->write_iter()
iter_file_splice_write() - a ->splice_write() instance that gathers the
pipe buffers, builds a bio_vec-based iov_iter covering those and feeds
it to ->write_iter(). A bunch of simple cases coverted to that...
[AV: fixed the braino spotted by Cyrill]
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_file.c | 43 | ||||
| -rw-r--r-- | fs/xfs/xfs_trace.h | 1 |
2 files changed, 1 insertions, 43 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 5446e86d3485..b1c489c1fb2e 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -343,47 +343,6 @@ xfs_file_splice_read( } /* - * xfs_file_splice_write() does not use xfs_rw_ilock() because - * generic_file_splice_write() takes the i_mutex itself. This, in theory, - * couuld cause lock inversions between the aio_write path and the splice path - * if someone is doing concurrent splice(2) based writes and write(2) based - * writes to the same inode. The only real way to fix this is to re-implement - * the generic code here with correct locking orders. - */ -STATIC ssize_t -xfs_file_splice_write( - struct pipe_inode_info *pipe, - struct file *outfilp, - loff_t *ppos, - size_t count, - unsigned int flags) -{ - struct inode *inode = outfilp->f_mapping->host; - struct xfs_inode *ip = XFS_I(inode); - int ioflags = 0; - ssize_t ret; - - XFS_STATS_INC(xs_write_calls); - - if (outfilp->f_mode & FMODE_NOCMTIME) - ioflags |= IO_INVIS; - - if (XFS_FORCED_SHUTDOWN(ip->i_mount)) - return -EIO; - - xfs_ilock(ip, XFS_IOLOCK_EXCL); - - trace_xfs_file_splice_write(ip, count, *ppos, ioflags); - - ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags); - if (ret > 0) - XFS_STATS_ADD(xs_write_bytes, ret); - - xfs_iunlock(ip, XFS_IOLOCK_EXCL); - return ret; -} - -/* * This routine is called to handle zeroing any space in the last block of the * file that is beyond the EOF. We do this since the size is being increased * without writing anything to that block and we don't want to read the @@ -1442,7 +1401,7 @@ const struct file_operations xfs_file_operations = { .read_iter = xfs_file_read_iter, .write_iter = xfs_file_write_iter, .splice_read = xfs_file_splice_read, - .splice_write = xfs_file_splice_write, + .splice_write = iter_file_splice_write, .unlocked_ioctl = xfs_file_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = xfs_file_compat_ioctl, diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 65d8c793a25c..53182f97cf01 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -1060,7 +1060,6 @@ DEFINE_RW_EVENT(xfs_file_read); DEFINE_RW_EVENT(xfs_file_buffered_write); DEFINE_RW_EVENT(xfs_file_direct_write); DEFINE_RW_EVENT(xfs_file_splice_read); -DEFINE_RW_EVENT(xfs_file_splice_write); DECLARE_EVENT_CLASS(xfs_page_class, TP_PROTO(struct inode *inode, struct page *page, unsigned long off, |