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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2011-03-08 12:09:49 +0100 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2011-03-22 21:43:36 +0100 |
| commit | ea59bb759b8fd240860c37026ab1b998d26ac285 (patch) | |
| tree | de7fee45a8c08b7407f1b0d833889ca69154a506 /fs/9p/fid.c | |
| parent | fs/9p: Use truncate_setsize instead of vmtruncate (diff) | |
| download | linux-ea59bb759b8fd240860c37026ab1b998d26ac285.tar.xz linux-ea59bb759b8fd240860c37026ab1b998d26ac285.zip | |
fs/9p: Open writeback fid in O_SYNC mode
Older version of protocol don't support tsyncfs operation.
So for them force a O_SYNC flag on the server
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/9p/fid.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/fs/9p/fid.c b/fs/9p/fid.c index cd63e002d826..99a1a7b08634 100644 --- a/fs/9p/fid.c +++ b/fs/9p/fid.c @@ -286,9 +286,11 @@ static struct p9_fid *v9fs_fid_clone_with_uid(struct dentry *dentry, uid_t uid) struct p9_fid *v9fs_writeback_fid(struct dentry *dentry) { - int err; + int err, flags; struct p9_fid *fid; + struct v9fs_session_info *v9ses; + v9ses = v9fs_inode2v9ses(dentry->d_inode); fid = v9fs_fid_clone_with_uid(dentry, 0); if (IS_ERR(fid)) goto error_out; @@ -297,8 +299,17 @@ struct p9_fid *v9fs_writeback_fid(struct dentry *dentry) * dirty pages. We always request for the open fid in read-write * mode so that a partial page write which result in page * read can work. + * + * we don't have a tsyncfs operation for older version + * of protocol. So make sure the write back fid is + * opened in O_SYNC mode. */ - err = p9_client_open(fid, O_RDWR); + if (!v9fs_proto_dotl(v9ses)) + flags = O_RDWR | O_SYNC; + else + flags = O_RDWR; + + err = p9_client_open(fid, flags); if (err < 0) { p9_client_clunk(fid); fid = ERR_PTR(err); |