From c1a85bc6e919498fbc9f0ef5b040b3855a2485b0 Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Date: Mon, 31 May 2010 13:22:45 +0530
Subject: [PATCH] --- yaml --- r: 201796 b: refs/heads/master c:
 0ef63f345c48afe5896c5cffcba57f0457d409b9 h: refs/heads/master v: v3

---
 [refs]                        |  2 +-
 trunk/include/net/9p/9p.h     |  2 ++
 trunk/include/net/9p/client.h |  1 +
 trunk/net/9p/client.c         | 50 +++++++++++++++++++++++++++++++++++
 4 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 836e6e742356..be5f164e4169 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ef56547efa3c88609069e2a91f46e25c31dd536e
+refs/heads/master: 0ef63f345c48afe5896c5cffcba57f0457d409b9
diff --git a/trunk/include/net/9p/9p.h b/trunk/include/net/9p/9p.h
index cf580a40e299..6fabb5e559ba 100644
--- a/trunk/include/net/9p/9p.h
+++ b/trunk/include/net/9p/9p.h
@@ -153,6 +153,8 @@ enum p9_msg_t {
 	P9_RGETATTR,
 	P9_TSETATTR = 26,
 	P9_RSETATTR,
+	P9_TXATTRWALK = 30,
+	P9_RXATTRWALK,
 	P9_TREADDIR = 40,
 	P9_RREADDIR,
 	P9_TLINK = 70,
diff --git a/trunk/include/net/9p/client.h b/trunk/include/net/9p/client.h
index d755c0ed6750..60398b1a3f75 100644
--- a/trunk/include/net/9p/client.h
+++ b/trunk/include/net/9p/client.h
@@ -260,5 +260,6 @@ void p9stat_free(struct p9_wstat *);
 
 int p9_is_proto_dotu(struct p9_client *clnt);
 int p9_is_proto_dotl(struct p9_client *clnt);
+struct p9_fid *p9_client_xattrwalk(struct p9_fid *, const char *, u64 *);
 
 #endif /* NET_9P_CLIENT_H */
diff --git a/trunk/net/9p/client.c b/trunk/net/9p/client.c
index c458e042d384..ec80ee71d453 100644
--- a/trunk/net/9p/client.c
+++ b/trunk/net/9p/client.c
@@ -1622,6 +1622,56 @@ int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name)
 }
 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;