From eda25e46161527845572131b37706a458d9270ef Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Mon, 31 May 2010 13:22:50 +0530 Subject: net/9p: Implement TXATTRCREATE 9p call TXATTRCREATE: Prepare a fid for setting xattr value on a file system object. size[4] TXATTRCREATE tag[2] fid[4] name[s] attr_size[8] flags[4] size[4] RXATTRCREATE tag[2] txattrcreate gets a fid pointing to xattr. This fid can later be used to set the xattr value. flag value is derived from set Linux setxattr. The manpage says "The flags parameter can be used to refine the semantics of the operation. XATTR_CREATE specifies a pure create, which fails if the named attribute exists already. XATTR_REPLACE specifies a pure replace operation, which fails if the named attribute does not already exist. By default (no flags), the extended attribute will be created if need be, or will simply replace the value if the attribute exists." The actual setxattr operation happens when the fid is clunked. At that point the written byte count and the attr_size specified in TXATTRCREATE should be same otherwise an error will be returned. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Venkateswararao Jujjuri Signed-off-by: Eric Van Hensbergen --- net/9p/client.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'net') diff --git a/net/9p/client.c b/net/9p/client.c index ec80ee71d453..43396acd714a 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -1672,6 +1672,31 @@ error: } EXPORT_SYMBOL_GPL(p9_client_xattrwalk); +int p9_client_xattrcreate(struct p9_fid *fid, const char *name, + u64 attr_size, int flags) +{ + int err; + struct p9_req_t *req; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, + ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", + fid->fid, name, (long long)attr_size, flags); + err = 0; + clnt = fid->clnt; + req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", + fid->fid, name, attr_size, flags); + if (IS_ERR(req)) { + err = PTR_ERR(req); + goto error; + } + P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); + p9_free_req(clnt, req); +error: + return err; +} +EXPORT_SYMBOL_GPL(p9_client_xattrcreate); + int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) { int err, rsize, total; -- cgit v1.2.3