diff mbox series

[v4,10/12] 9p: add P9_ERRMAX for 9p2000 and 9p2000.u

Message ID 7cb10547a122c32fdafd68c77f0625f9a4d9a8bf.1640870037.git.linux_oss@crudebyte.com (mailing list archive)
State Not Applicable
Delegated to: Netdev Maintainers
Headers show
Series remove msize limit in virtio transport | expand

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Context Check Description
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 4 this patch: 4
netdev/cc_maintainers warning 2 maintainers not CCed: davem@davemloft.net kuba@kernel.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 4 this patch: 4
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 9 lines checked
netdev/kdoc success Errors and warnings before: 27 this patch: 27
netdev/source_inline success Was 0 now: 0
netdev/tree_selection success Guessing tree name failed - patch did not apply

Commit Message

Christian Schoenebeck Dec. 30, 2021, 1:23 p.m. UTC
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 mbox series

Patch

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