9p: Implement LOPEN
Implement 9p2000.L version of open(LOPEN) interface in 9p client.
For LOPEN, no need to convert the flags to and from 9p mode to VFS mode.
Synopsis:
size[4] Tlopen tag[2] fid[4] mode[4]
size[4] Rlopen tag[2] qid[13] iounit[4]
[Fix mode bit format - jvrao@linux.vnet.ibm.com]
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 2d686ec..e97c92b 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -59,9 +59,13 @@
struct p9_fid *fid;
int omode;
- P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p \n", inode, file);
+ P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p\n", inode, file);
v9ses = v9fs_inode2v9ses(inode);
- omode = v9fs_uflags2omode(file->f_flags, v9fs_proto_dotu(v9ses));
+ if (v9fs_proto_dotl(v9ses))
+ omode = file->f_flags;
+ else
+ omode = v9fs_uflags2omode(file->f_flags,
+ v9fs_proto_dotu(v9ses));
fid = file->private_data;
if (!fid) {
fid = v9fs_fid_clone(file->f_path.dentry);
@@ -73,11 +77,12 @@
p9_client_clunk(fid);
return err;
}
- if (omode & P9_OTRUNC) {
+ if (file->f_flags & O_TRUNC) {
i_size_write(inode, 0);
inode->i_blocks = 0;
}
- if ((file->f_flags & O_APPEND) && (!v9fs_proto_dotu(v9ses)))
+ if ((file->f_flags & O_APPEND) &&
+ (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)))
generic_file_llseek(file, 0, SEEK_END);
}
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index 06d111d..cf580a4 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -139,6 +139,8 @@
enum p9_msg_t {
P9_TSTATFS = 8,
P9_RSTATFS,
+ P9_TLOPEN = 12,
+ P9_RLOPEN,
P9_TLCREATE = 14,
P9_RLCREATE,
P9_TSYMLINK = 16,
diff --git a/net/9p/client.c b/net/9p/client.c
index e580409..c458e04 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1016,14 +1016,18 @@
struct p9_qid qid;
int iounit;
- P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode);
- err = 0;
clnt = fid->clnt;
+ P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n",
+ p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode);
+ err = 0;
if (fid->mode != -1)
return -EINVAL;
- req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
+ if (p9_is_proto_dotl(clnt))
+ req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode);
+ else
+ req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto error;
@@ -1035,10 +1039,9 @@
goto free_and_error;
}
- P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n",
- qid.type,
- (unsigned long long)qid.path,
- qid.version, iounit);
+ P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n",
+ p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type,
+ (unsigned long long)qid.path, qid.version, iounit);
fid->mode = mode;
fid->iounit = iounit;