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authorLatchesar Ionkov <lucho@ionkov.net>2009-04-05 16:22:16 -0500
committerEric Van Hensbergen <ericvh@vTrogdor.(none)>2009-04-05 16:54:52 -0500
commit453ed90d1395a5281a8f1a0de5d8aabc66202e34 (patch)
treedca5c43212ec89988a9367dec12f4d43bc45c5c9
parentb4348f32dae3cb6eb4bc21c7ed8f76c0b11e9d6a (diff)
net/9p: set correct stat size when sending Twstat messages
The 9P2000 Twstat message requires the size of the stat structure to be specified. Currently the 9p code writes zero instead of the actual size. This behavior confuses some of the file servers that check if the size is correct. This patch adds a new function that calculcates the stat size and puts the value in the appropriate place in the 9P message. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Reviewed-by: Eric Van Hensbergen <ericvh@gmail.com>
-rw-r--r--net/9p/client.c34
1 files changed, 31 insertions, 3 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index 1eb580c38fb..93f442aaa11 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1251,12 +1251,42 @@ error:
}
EXPORT_SYMBOL(p9_client_stat);
+static int p9_client_statsize(struct p9_wstat *wst, int optional)
+{
+ int ret;
+
+ /* size[2] type[2] dev[4] qid[13] */
+ /* mode[4] atime[4] mtime[4] length[8]*/
+ /* name[s] uid[s] gid[s] muid[s] */
+ ret = 2+2+4+13+4+4+4+8+2+2+2+2;
+
+ if (wst->name)
+ ret += strlen(wst->name);
+ if (wst->uid)
+ ret += strlen(wst->uid);
+ if (wst->gid)
+ ret += strlen(wst->gid);
+ if (wst->muid)
+ ret += strlen(wst->muid);
+
+ if (optional) {
+ ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */
+ if (wst->extension)
+ ret += strlen(wst->extension);
+ }
+
+ return ret;
+}
+
int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
{
int err;
struct p9_req_t *req;
struct p9_client *clnt;
+ err = 0;
+ clnt = fid->clnt;
+ wst->size = p9_client_statsize(wst, clnt->dotu);
P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid);
P9_DPRINTK(P9_DEBUG_9P,
" sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
@@ -1268,10 +1298,8 @@ int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
wst->atime, wst->mtime, (unsigned long long)wst->length,
wst->name, wst->uid, wst->gid, wst->muid, wst->extension,
wst->n_uid, wst->n_gid, wst->n_muid);
- err = 0;
- clnt = fid->clnt;
- req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, 0, wst);
+ req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size, wst);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto error;