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authorBoaz Harrosh <boaz@plexistor.com>2015-04-16 02:15:17 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-16 02:35:20 +0300
commitbe64f884bed729b5d127db6a737155a4e514d286 (patch)
treee6a8204f14b497cbfb845cc30920955dc7671527 /fs/splice.c
parent0e3b210ce1722168227cb3bc7746256d0c0afece (diff)
downloadlinux-be64f884bed729b5d127db6a737155a4e514d286.tar.xz
dax: unify ext2/4_{dax,}_file_operations
The original dax patchset split the ext2/4_file_operations because of the two NULL splice_read/splice_write in the dax case. In the vfs if splice_read/splice_write are NULL we then call default_splice_read/write. What we do here is make generic_file_splice_read aware of IS_DAX() so the original ext2/4_file_operations can be used as is. For write it appears that iter_file_splice_write is just fine. It uses the regular f_op->write(file,..) or new_sync_write(file, ...). Signed-off-by: Boaz Harrosh <boaz@plexistor.com> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Dave Chinner <dchinner@redhat.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/splice.c')
-rw-r--r--fs/splice.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/splice.c b/fs/splice.c
index 41cbb16299e0..476024bb6546 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -523,6 +523,9 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
loff_t isize, left;
int ret;
+ if (IS_DAX(in->f_mapping->host))
+ return default_file_splice_read(in, ppos, pipe, len, flags);
+
isize = i_size_read(in->f_mapping->host);
if (unlikely(*ppos >= isize))
return 0;