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| author |   Boaz Harrosh <boaz@plexistor.com> | 2015-04-15 16:15:17 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-15 16:35:20 -0700 |
| commit | be64f884bed729b5d127db6a737155a4e514d286 (patch) | |
| tree | e6a8204f14b497cbfb845cc30920955dc7671527 /fs/splice.c | |
| parent | dax: use pfn_mkwrite to update c/mtime + freeze protection (diff) | |
| download | linux-dev-be64f884bed729b5d127db6a737155a4e514d286.tar.xz linux-dev-be64f884bed729b5d127db6a737155a4e514d286.zip | |
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.c | 3 |
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; |