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fs/9p: Update zero-copy implementation in 9p

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* remove lot of update to different data structure
* add a seperate callback for zero copy request.
* above makes non zero copy code path simpler
* remove conditionalizing TREAD/TREADDIR/TWRITE in the zero copy path
* Fix the dotu p9_check_errors with zero copy. Add sufficient doc around
* Add support for both in and output buffers in zero copy callback
* pin and unpin pages in the same context
* use helpers instead of defining page offset and rest of page ourself
* Fix mem leak in p9_check_errors
* Remove 'E' and 'F' in p9pdu_vwritef

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Aneesh Kumar K.V
2011-08-16 10:50:10 +05:30
committed by Eric Van Hensbergen
parent c3b92c8787
commit abfa034e4b
9 changed files with 522 additions and 364 deletions
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2
fs/9p/vfs_dir.c
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@ -231,7 +231,7 @@ static int v9fs_dir_readdir_dotl(struct file *filp, void *dirent,
while (err == 0) {
if (rdir->tail == rdir->head) {
err = p9_client_readdir(fid, rdir->buf, buflen,
filp->f_pos);
filp->f_pos);
if (err <= 0)
goto unlock_and_exit;