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9p: Implement TREADLINK operation for 9p2000.L

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Synopsis

	size[4] TReadlink tag[2] fid[4]
	size[4] RReadlink tag[2] target[s]

Description
	Readlink is used to return the contents of the symoblic link
        referred by fid. Contents of symboic link is returned as a
        response.

	target[s] - Contents of the symbolic link referred by fid.

Signed-off-by: M. Mohan Kumar <[email protected]>
Reviewed-by: Aneesh Kumar K.V <[email protected]>
Signed-off-by: Venkateswararao Jujjuri <[email protected]>
Signed-off-by: Eric Van Hensbergen <[email protected]>
This commit is contained in:
M. Mohan Kumar 2010-09-28 19:59:25 +05:30 • committed by Eric Van Hensbergen
commit 329176cc2c
4 changed files with 86 additions and 3 deletions
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26
net/9p/client.c
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@ -1870,3 +1870,29 @@ error:
return err;
}
EXPORT_SYMBOL(p9_client_getlock_dotl);
int p9_client_readlink(struct p9_fid *fid, char **target)
{
int err;
struct p9_client *clnt;
struct p9_req_t *req;
err = 0;
clnt = fid->clnt;
P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid);
req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid);
if (IS_ERR(req))
return PTR_ERR(req);
err = p9pdu_readf(req->rc, clnt->proto_version, "s", target);
if (err) {
p9pdu_dump(1, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target);
error:
p9_free_req(clnt, req);
return err;
}
EXPORT_SYMBOL(p9_client_readlink);