diff options
| -rw-r--r-- | fs/cifs/file.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 7ddddf2e250..5a5a87240fe 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -3663,6 +3663,27 @@ void cifs_oplock_break(struct work_struct *work) } } +/* + * The presence of cifs_direct_io() in the address space ops vector + * allowes open() O_DIRECT flags which would have failed otherwise. + * + * In the non-cached mode (mount with cache=none), we shunt off direct read and write requests + * so this method should never be called. + * + * Direct IO is not yet supported in the cached mode. + */ +static ssize_t +cifs_direct_io(int rw, struct kiocb *iocb, const struct iovec *iov, + loff_t pos, unsigned long nr_segs) +{ + /* + * FIXME + * Eventually need to support direct IO for non forcedirectio mounts + */ + return -EINVAL; +} + + const struct address_space_operations cifs_addr_ops = { .readpage = cifs_readpage, .readpages = cifs_readpages, @@ -3672,6 +3693,7 @@ const struct address_space_operations cifs_addr_ops = { .write_end = cifs_write_end, .set_page_dirty = __set_page_dirty_nobuffers, .releasepage = cifs_release_page, + .direct_IO = cifs_direct_io, .invalidatepage = cifs_invalidate_page, .launder_page = cifs_launder_page, }; |