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From: Christian Schoenebeck <linux_oss@crudebyte.com>
To: v9fs-developer@lists.sourceforge.net
Cc: netdev@vger.kernel.org,
	Dominique Martinet <asmadeus@codewreck.org>,
	Eric Van Hensbergen <ericvh@gmail.com>,
	Latchesar Ionkov <lucho@ionkov.net>, Greg Kurz <groug@kaod.org>,
	Vivek Goyal <vgoyal@redhat.com>,
	Nikolay Kichukov <nikolay@oldum.net>
Subject: [PATCH v4 10/12] 9p: add P9_ERRMAX for 9p2000 and 9p2000.u
Date: Thu, 30 Dec 2021 14:23:18 +0100	[thread overview]
Message-ID: <7cb10547a122c32fdafd68c77f0625f9a4d9a8bf.1640870037.git.linux_oss@crudebyte.com> (raw)
In-Reply-To: <cover.1640870037.git.linux_oss@crudebyte.com>

Add P9_ERRMAX macro to 9P protocol header which reflects the maximum
error string length of Rerror replies for 9p2000 and 9p2000.u protocol
versions. Unfortunately a maximum error string length is not defined by
the 9p2000 spec, picking 128 as value for now, as this seems to be a
common max. size for POSIX error strings in practice.

9p2000.L protocol version uses Rlerror replies instead which does not
contain an error string.

Signed-off-by: Christian Schoenebeck <linux_oss@crudebyte.com>
---
 include/net/9p/9p.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index 9c6ec78e47a5..a447acc55b02 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -331,6 +331,9 @@ enum p9_qid_t {
 /* size of header for zero copy read/write */
 #define P9_ZC_HDR_SZ 4096
 
+/* maximum length of an error string */
+#define P9_ERRMAX 128
+
 /**
  * struct p9_qid - file system entity information
  * @type: 8-bit type &p9_qid_t
-- 
2.30.2


  parent reply	other threads:[~2021-12-30 14:42 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-30 13:23 [PATCH v4 00/12] remove msize limit in virtio transport Christian Schoenebeck
2021-12-30 13:23 ` [PATCH v4 12/12] net/9p: allocate appropriate reduced message buffers Christian Schoenebeck
2022-04-02 14:05   ` Dominique Martinet
2022-04-03 11:29     ` Christian Schoenebeck
2022-04-03 12:37       ` Dominique Martinet
2022-04-03 14:00         ` Christian Schoenebeck
2021-12-30 13:23 ` [PATCH v4 11/12] net/9p: add p9_msg_buf_size() Christian Schoenebeck
2021-12-30 13:23 ` [PATCH v4 04/12] 9p/trans_virtio: introduce struct virtqueue_sg Christian Schoenebeck
2021-12-30 13:23 ` [PATCH v4 02/12] 9p/trans_virtio: separate allocation of scatter gather list Christian Schoenebeck
2021-12-30 13:23 ` [PATCH v4 08/12] net/9p: limit 'msize' to KMALLOC_MAX_SIZE for all transports Christian Schoenebeck
2021-12-30 13:23 ` Christian Schoenebeck [this message]
2021-12-30 13:23 ` [PATCH v4 03/12] 9p/trans_virtio: turn amount of sg lists into runtime info Christian Schoenebeck
2021-12-30 13:23 ` [PATCH v4 05/12] net/9p: add trans_maxsize to struct p9_client Christian Schoenebeck
2021-12-30 13:23 ` [PATCH v4 06/12] 9p/trans_virtio: support larger msize values Christian Schoenebeck
2021-12-30 13:23 ` [PATCH v4 01/12] net/9p: show error message if user 'msize' cannot be satisfied Christian Schoenebeck
2021-12-30 13:23 ` [PATCH v4 07/12] 9p/trans_virtio: resize sg lists to whatever is possible Christian Schoenebeck
2021-12-30 13:23 ` [PATCH v4 09/12] net/9p: split message size argument into 't_size' and 'r_size' pair Christian Schoenebeck
2022-01-20 22:43 ` [PATCH v4 00/12] remove msize limit in virtio transport Nikolay Kichukov
2022-01-22 13:34   ` Christian Schoenebeck
2022-01-24 10:21     ` Nikolay Kichukov
2022-01-24 11:07       ` Dominique Martinet
2022-01-24 11:57         ` Christian Schoenebeck
2022-01-24 12:56           ` Dominique Martinet
2022-01-24 13:55             ` Christian Schoenebeck
2022-01-25  8:45           ` Nikolay Kichukov
2022-05-24  8:10         ` Nikolay Kichukov
2022-05-24 11:29           ` Christian Schoenebeck
2022-07-07 14:30 ` Christian Schoenebeck
     [not found]   ` <CAFkjPT=GAoViYd0E7CZQDq3ZjhmYT0DsBytfZXnE10JL0P8O-Q@mail.gmail.com>
2022-07-08  1:15     ` Dominique Martinet
     [not found]       ` <CAFkjPTngeFh=0mPVW-Yf1Sxkxp_HDNUeANndoYN3-eU9_rGLuQ@mail.gmail.com>
2022-07-08 11:18         ` Christian Schoenebeck
2022-07-08 11:40           ` Dominique Martinet
2022-07-08 13:00             ` Christian Schoenebeck

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