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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2010-05-31 13:22:45 +0530
committerEric Van Hensbergen <ericvh@gmail.com>2010-08-02 14:28:33 -0500
commit0ef63f345c48afe5896c5cffcba57f0457d409b9 (patch)
treeb02ca26b3d74d998a6e609a9abd9a753d0ab8075 /net/9p
parentef56547efa3c88609069e2a91f46e25c31dd536e (diff)
downloadlinux-0ef63f345c48afe5896c5cffcba57f0457d409b9.tar.bz2
net/9p: Implement attrwalk 9p call
TXATTRWALK: Descend a ATTR namespace size[4] TXATTRWALK tag[2] fid[4] newfid[4] name[s] size[4] RXATTRWALK tag[2] size[8] txattrwalk gets a fid pointing to xattr. This fid can later be used to read the xattr value. If name is NULL the fid returned can be used to get the list of extended attribute associated to the file system object. 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 'net/9p')
-rw-r--r--net/9p/client.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index c458e042d384..ec80ee71d453 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1622,6 +1622,56 @@ error:
}
EXPORT_SYMBOL(p9_client_rename);
+/*
+ * An xattrwalk without @attr_name gives the fid for the lisxattr namespace
+ */
+struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid,
+ const char *attr_name, u64 *attr_size)
+{
+ int err;
+ struct p9_req_t *req;
+ struct p9_client *clnt;
+ struct p9_fid *attr_fid;
+
+ err = 0;
+ clnt = file_fid->clnt;
+ attr_fid = p9_fid_create(clnt);
+ if (IS_ERR(attr_fid)) {
+ err = PTR_ERR(attr_fid);
+ attr_fid = NULL;
+ goto error;
+ }
+ P9_DPRINTK(P9_DEBUG_9P,
+ ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n",
+ file_fid->fid, attr_fid->fid, attr_name);
+
+ req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds",
+ file_fid->fid, attr_fid->fid, attr_name);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ goto error;
+ }
+ err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size);
+ if (err) {
+ p9pdu_dump(1, req->rc);
+ p9_free_req(clnt, req);
+ goto clunk_fid;
+ }
+ p9_free_req(clnt, req);
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n",
+ attr_fid->fid, *attr_size);
+ return attr_fid;
+clunk_fid:
+ p9_client_clunk(attr_fid);
+ attr_fid = NULL;
+error:
+ if (attr_fid && (attr_fid != file_fid))
+ p9_fid_destroy(attr_fid);
+
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(p9_client_xattrwalk);
+
int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)
{
int err, rsize, total;