From: Chuck Lever <chuck.lever@oracle.com>
To: linux-nfs@vger.kernel.org
Subject: [PATCH v1 05/29] lockd: Update the NLMv1 TEST arguments decoder to use struct xdr_stream
Date: Mon, 03 May 2021 11:23:18 -0400 [thread overview]
Message-ID: <162005539835.23028.10098614162399766502.stgit@klimt.1015granger.net> (raw)
In-Reply-To: <162005520101.23028.15766816408658851498.stgit@klimt.1015granger.net>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
fs/lockd/xdr.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 66 insertions(+), 6 deletions(-)
diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index 8be42a23679e..56982edd4766 100644
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -98,6 +98,33 @@ nlm_decode_fh(__be32 *p, struct nfs_fh *f)
return p + XDR_QUADLEN(NFS2_FHSIZE);
}
+/*
+ * NLM file handles are defined by specification to be a variable-length
+ * XDR opaque no longer than 1024 bytes. However, this implementation
+ * constrains their length to exactly the length of an NFSv2 file
+ * handle.
+ */
+static bool
+svcxdr_decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh)
+{
+ __be32 *p;
+ u32 len;
+
+ if (xdr_stream_decode_u32(xdr, &len) < 0)
+ return false;
+ if (len != NFS2_FHSIZE)
+ return false;
+
+ p = xdr_inline_decode(xdr, len);
+ if (!p)
+ return false;
+ fh->size = NFS2_FHSIZE;
+ memcpy(fh->data, p, len);
+ memset(fh->data + NFS2_FHSIZE, 0, sizeof(fh->data) - NFS2_FHSIZE);
+
+ return true;
+}
+
/*
* Encode and decode owner handle
*/
@@ -143,6 +170,38 @@ nlm_decode_lock(__be32 *p, struct nlm_lock *lock)
return p;
}
+static bool
+svcxdr_decode_lock(struct xdr_stream *xdr, struct nlm_lock *lock)
+{
+ struct file_lock *fl = &lock->fl;
+ s32 start, len, end;
+
+ if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))
+ return false;
+ if (!svcxdr_decode_fhandle(xdr, &lock->fh))
+ return false;
+ if (!svcxdr_decode_owner(xdr, &lock->oh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &lock->svid) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &start) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &len) < 0)
+ return false;
+
+ locks_init_lock(fl);
+ fl->fl_flags = FL_POSIX;
+ fl->fl_type = F_RDLCK;
+ end = start + len - 1;
+ fl->fl_start = s32_to_loff_t(start);
+ if (len == 0 || end < 0)
+ fl->fl_end = OFFSET_MAX;
+ else
+ fl->fl_end = s32_to_loff_t(end);
+
+ return true;
+}
+
/*
* Encode result of a TEST/TEST_MSG call
*/
@@ -192,19 +251,20 @@ nlmsvc_decode_void(struct svc_rqst *rqstp, __be32 *p)
int
nlmsvc_decode_testargs(struct svc_rqst *rqstp, __be32 *p)
{
+ struct xdr_stream *xdr = &rqstp->rq_arg_stream;
struct nlm_args *argp = rqstp->rq_argp;
- u32 exclusive;
+ u32 exclusive;
- if (!(p = nlm_decode_cookie(p, &argp->cookie)))
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
return 0;
-
- exclusive = ntohl(*p++);
- if (!(p = nlm_decode_lock(p, &argp->lock)))
+ if (xdr_stream_decode_bool(xdr, &exclusive) < 0)
+ return 0;
+ if (!svcxdr_decode_lock(xdr, &argp->lock))
return 0;
if (exclusive)
argp->lock.fl.fl_type = F_WRLCK;
- return xdr_argsize_check(rqstp, p);
+ return 1;
}
int
next prev parent reply other threads:[~2021-05-03 15:23 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-03 15:22 [PATCH v1 00/29] server-side lockd XDR overhaul Chuck Lever
2021-05-03 15:22 ` [PATCH v1 01/29] lockd: Remove stale comments Chuck Lever
2021-05-03 15:22 ` [PATCH v1 02/29] lockd: Create a simplified .vs_dispatch method for NLM requests Chuck Lever
2021-05-03 15:23 ` [PATCH v1 03/29] lockd: Common NLM XDR helpers Chuck Lever
2021-05-03 15:23 ` [PATCH v1 04/29] lockd: Update the NLMv1 void argument decoder to use struct xdr_stream Chuck Lever
2021-05-03 15:23 ` Chuck Lever [this message]
2021-05-03 15:23 ` [PATCH v1 06/29] lockd: Update the NLMv1 LOCK arguments " Chuck Lever
2021-05-03 15:23 ` [PATCH v1 07/29] lockd: Update the NLMv1 CANCEL " Chuck Lever
2021-05-03 15:23 ` [PATCH v1 08/29] lockd: Update the NLMv1 UNLOCK " Chuck Lever
2021-05-03 15:23 ` [PATCH v1 09/29] lockd: Update the NLMv1 nlm_res " Chuck Lever
2021-05-03 15:23 ` [PATCH v1 10/29] lockd: Update the NLMv1 SM_NOTIFY " Chuck Lever
2021-05-03 15:23 ` [PATCH v1 11/29] lockd: Update the NLMv1 SHARE " Chuck Lever
2021-05-03 15:24 ` [PATCH v1 12/29] lockd: Update the NLMv1 FREE_ALL " Chuck Lever
2021-05-03 15:24 ` [PATCH v1 13/29] lockd: Update the NLMv1 void results encoder " Chuck Lever
2021-05-03 15:24 ` [PATCH v1 14/29] lockd: Update the NLMv1 TEST " Chuck Lever
2021-05-03 15:24 ` [PATCH v1 15/29] lockd: Update the NLMv1 nlm_res " Chuck Lever
2021-05-03 15:24 ` [PATCH v1 16/29] lockd: Update the NLMv1 SHARE " Chuck Lever
2021-05-03 15:24 ` [PATCH v1 17/29] lockd: Update the NLMv4 void arguments decoder " Chuck Lever
2021-05-03 15:24 ` [PATCH v1 18/29] lockd: Update the NLMv4 TEST " Chuck Lever
2021-05-03 15:24 ` [PATCH v1 19/29] lockd: Update the NLMv4 LOCK " Chuck Lever
2021-05-03 15:24 ` [PATCH v1 20/29] lockd: Update the NLMv4 CANCEL " Chuck Lever
2021-05-03 15:24 ` [PATCH v1 21/29] lockd: Update the NLMv4 UNLOCK " Chuck Lever
2021-05-03 15:25 ` [PATCH v1 22/29] lockd: Update the NLMv4 nlm_res " Chuck Lever
2021-05-03 15:25 ` [PATCH v1 23/29] lockd: Update the NLMv4 SM_NOTIFY " Chuck Lever
2021-05-03 15:25 ` [PATCH v1 24/29] lockd: Update the NLMv4 SHARE " Chuck Lever
2021-05-03 15:25 ` [PATCH v1 25/29] lockd: Update the NLMv4 FREE_ALL " Chuck Lever
2021-05-03 15:25 ` [PATCH v1 26/29] lockd: Update the NLMv4 void results encoder " Chuck Lever
2021-05-03 15:25 ` [PATCH v1 27/29] lockd: Update the NLMv4 TEST " Chuck Lever
2021-05-03 15:25 ` [PATCH v1 28/29] lockd: Update the NLMv4 nlm_res " Chuck Lever
2021-05-03 15:25 ` [PATCH v1 29/29] lockd: Update the NLMv4 SHARE " Chuck Lever
2021-05-03 17:59 ` [PATCH v1 00/29] server-side lockd XDR overhaul J. Bruce Fields
2021-05-03 18:02 ` Chuck Lever III
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