diff options
| author | Jeff Layton <jlayton@redhat.com> | 2012-03-23 14:40:56 -0400 |
|---|---|---|
| committer | Jeff Layton <jlayton@redhat.com> | 2012-03-23 14:40:56 -0400 |
| commit | e9492871fb0546f1b73f309d9e8c0f030bfdfdca (patch) | |
| tree | be69a497fddd74de6b2f6ed18f525907a6dadab4 /fs/cifs/file.c | |
| parent | a7103b99e4cc00b9d40f6bad77389f9e2341820a (diff) | |
cifs: abstract out function to marshal up the iovec array for async writes
We'll need to do something a bit different depending on the caller.
Abstract the code that marshals the page array into an iovec.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Diffstat (limited to 'fs/cifs/file.c')
| -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 5633202b199c..58ac0f0512e7 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1648,6 +1648,27 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to) return rc; } +/* + * Marshal up the iov array, reserving the first one for the header. Also, + * set wdata->bytes. + */ +static void +cifs_writepages_marshal_iov(struct kvec *iov, struct cifs_writedata *wdata) +{ + int i; + struct inode *inode = wdata->cfile->dentry->d_inode; + loff_t size = i_size_read(inode); + + /* marshal up the pages into iov array */ + wdata->bytes = 0; + for (i = 0; i < wdata->nr_pages; i++) { + iov[i + 1].iov_len = min(size - page_offset(wdata->pages[i]), + (loff_t)PAGE_CACHE_SIZE); + iov[i + 1].iov_base = kmap(wdata->pages[i]); + wdata->bytes += iov[i + 1].iov_len; + } +} + static int cifs_writepages(struct address_space *mapping, struct writeback_control *wbc) { @@ -1792,6 +1813,7 @@ retry: wdata->sync_mode = wbc->sync_mode; wdata->nr_pages = nr_pages; wdata->offset = page_offset(wdata->pages[0]); + wdata->marshal_iov = cifs_writepages_marshal_iov; do { if (wdata->cfile != NULL) |