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9p: Define and implement TLINK for 9P2000.L 

This patch adds a helper function to get the dentry from inode and
uses it in creating a Hardlink

SYNOPSIS

size[4] Tlink tag[2] dfid[4] oldfid[4] newpath[s]

size[4] Rlink tag[2]

DESCRIPTION

Create a link 'newpath' in directory pointed by dfid linking to oldfid path.

[sripathik@in.ibm.com : p9_client_link should not free req structure
if p9_client_rpc has returned an error.]

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Venkateswararao Jujjuri (JV) 2010-06-03 15:16:59 -07:00 committed by Eric Van Hensbergen
parent 09d34ee5f9
commit 652df9a7fd
3 changed files with 22 additions and 0 deletions
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2
include/net/9p/9p.h
View File

@ -139,6 +139,8 @@ enum p9_msg_t {
P9_RSETATTR,
P9_TREADDIR = 40,
P9_RREADDIR,
P9_TLINK = 70,
P9_RLINK,
P9_TVERSION = 100,
P9_RVERSION,
P9_TAUTH = 102,

1
include/net/9p/client.h
View File

@ -226,6 +226,7 @@ struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
int p9_client_open(struct p9_fid *fid, int mode);
int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
char *extension);
int p9_client_link(struct p9_fid *fid, struct p9_fid *oldfid, char *newname);
int p9_client_clunk(struct p9_fid *fid);
int p9_client_remove(struct p9_fid *fid);
int p9_client_read(struct p9_fid *fid, char *data, char __user *udata,

19
net/9p/client.c
View File

@ -1095,6 +1095,25 @@ error:
}
EXPORT_SYMBOL(p9_client_fcreate);
int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname)
{
struct p9_client *clnt;
struct p9_req_t *req;
P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n",
dfid->fid, oldfid->fid, newname);
clnt = dfid->clnt;
req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid,
newname);
if (IS_ERR(req))
return PTR_ERR(req);
P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n");
p9_free_req(clnt, req);
return 0;
}
EXPORT_SYMBOL(p9_client_link);
int p9_client_clunk(struct p9_fid *fid)
{
int err;