Changes in protocol.h

1effdbf9 - net/9p: add p9_msg_buf_size()

Fri, 15 Jul 2022 21:32:34 +0000

net/9p: add p9_msg_buf_size()This new function calculates a buffer size suitable for holding theintended 9p request or response. For rather small message types (whichapplies to almost all 9p message types actually) simply use hard codedvalues. For some variable-length and potentially large message typescalculate a more precise value according to what data is actuallytransmitted to avoid unnecessarily huge buffers.So p9_msg_buf_size() divides the individual 9p message types into 3message size categories: - dynamically calculated message size (i.e. potentially large) - 8k hard coded message size - 4k hard coded message sizeAs for the latter two hard coded message types: for most 9p messagetypes it is pretty obvious whether they would always fit into 4k or8k. But for some of them it depends on the maximum directory entryname length allowed by OS and filesystem for determining into whichof the two size categories they would fit into. Currently Linuxsupports directory entry names up to NAME_MAX (255), however whencomparing the limitation of individual filesystems, ReiserFStheoretically supports up to slightly below 4k long names. So inorder to make this code more future proof, and as revisiting itlater on is a bit tedious and has the potential to miss out details,the decision [1] was made to take 4k as basis as for max. name length.Link: https://lkml.kernel.org/r/bd6be891cf67e867688e8c8796d06408bfafa0d9.1657920926.git.linux_oss@crudebyte.comLink: https://lore.kernel.org/all/5564296.oo812IJUPE@silver/ [1]Signed-off-by: Christian Schoenebeck Signed-off-by: Dominique Martinet List of files: /linux-6.15/net/9p/protocol.h

6e195b0f - 9p: fix a bunch of checkpatch warnings

Tue, 02 Nov 2021 13:16:43 +0000

9p: fix a bunch of checkpatch warningsSohaib Mohamed started a serie of tiny and incomplete checkpatch fixes butseemingly stopped halfway -- take over and do most of it.This is still missing net/9p/trans* and net/9p/protocol.c for a latertime...Link: http://lkml.kernel.org/r/20211102134608.1588018-3-dominique.martinet@atmark-techno.comSigned-off-by: Dominique Martinet List of files: /linux-6.15/net/9p/protocol.h

024b7d6a - 9p: fix file headers

Tue, 02 Nov 2021 13:12:01 +0000

9p: fix file headers- add missing SPDX-License-Identifier- remove (sometimes incorrect) file name from file headerLink: http://lkml.kernel.org/r/20211102134608.1588018-2-dominique.martinet@atmark-techno.comSigned-off-by: Dominique Martinet List of files: /linux-6.15/net/9p/protocol.h

1f327613 - treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 188

Tue, 28 May 2019 16:57:16 +0000

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 188Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to free software foundation 51 franklin street fifth floor boston ma 02111 1301 usaextracted by the scancode license scanner the SPDX license identifier GPL-2.0-onlyhas been chosen to replace the boilerplate/reference in 27 file(s).Signed-off-by: Thomas Gleixner Reviewed-by: Richard Fontana Reviewed-by: Alexios Zavras Reviewed-by: Steve Winslow Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.orgLink: https://lkml.kernel.org/r/20190528170026.981318839@linutronix.deSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/net/9p/protocol.h

348b5901 - net/9p: Convert net/9p protocol dumps to tracepoints

Sat, 06 Aug 2011 19:16:59 +0000

net/9p: Convert net/9p protocol dumps to tracepointsThis helps in more control over debugging.root@qemu-img-64:~# ls /pass/123ls: cannot access /pass/123: No such file or directoryroot@qemu-img-64:~# cat /sys/kernel/debug/tracing/trace# tracer: nop## TASK-PID CPU# TIMESTAMP FUNCTION# | | | | | ls-1536 [001] 70.928584: 9p_protocol_dump: clnt 18446612132784021504 P9_TWALK(tag = 1)000: 16 00 00 00 6e 01 00 01 00 00 00 02 00 00 00 01010: 00 03 00 31 32 33 00 00 00 ff ff ff ff 00 00 00 ls-1536 [001] 70.928587: => trace_9p_protocol_dump => p9pdu_finalize => p9_client_rpc => p9_client_walk => v9fs_vfs_lookup => d_alloc_and_lookup => walk_component => path_lookupat ls-1536 [000] 70.929696: 9p_protocol_dump: clnt 18446612132784021504 P9_RLERROR(tag = 1)000: 0b 00 00 00 07 01 00 02 00 00 00 4e 03 00 02 00010: 00 00 00 00 03 00 02 00 00 00 00 00 ff 43 00 00 ls-1536 [000] 70.929697: => trace_9p_protocol_dump => p9_client_rpc => p9_client_walk => v9fs_vfs_lookup => d_alloc_and_lookup => walk_component => path_lookupat => do_path_lookupSigned-off-by: Aneesh Kumar K.V Signed-off-by: Eric Van Hensbergen List of files: /linux-6.15/net/9p/protocol.h

abfa034e - fs/9p: Update zero-copy implementation in 9p

Tue, 16 Aug 2011 05:20:10 +0000

fs/9p: Update zero-copy implementation in 9p* remove lot of update to different data structure* add a seperate callback for zero copy request.* above makes non zero copy code path simpler* remove conditionalizing TREAD/TREADDIR/TWRITE in the zero copy path* Fix the dotu p9_check_errors with zero copy. Add sufficient doc around* Add support for both in and output buffers in zero copy callback* pin and unpin pages in the same context* use helpers instead of defining page offset and rest of page ourself* Fix mem leak in p9_check_errors* Remove 'E' and 'F' in p9pdu_vwritefSigned-off-by: Aneesh Kumar K.V Signed-off-by: Eric Van Hensbergen List of files: /linux-6.15/net/9p/protocol.h

342fee1d - 9P2010.L handshake: Remove "dotu" variable

Fri, 05 Mar 2010 18:50:14 +0000

9P2010.L handshake: Remove "dotu" variableRemoves 'dotu' variable and make everything dependenton 'proto_version' field.Signed-off-by: Sripathi Kodi Signed-off-by: Eric Van Hensbergen List of files: /linux-6.15/net/9p/protocol.h

51a87c55 - 9p: rework client code to use new protocol support functions

Thu, 16 Oct 2008 13:30:07 +0000

9p: rework client code to use new protocol support functionsNow that the new protocol functions are in place, this patch switchesthe client code to using the new support code.Signed-off-by: Eric Van Hensbergen List of files: /linux-6.15/net/9p/protocol.h

ace51c4d - 9p: add new protocol support code

Tue, 14 Oct 2008 01:40:27 +0000

9p: add new protocol support codeThis adds a new protocol processing support code based on Anthony Liguori's9p library code. This code performs protocol marshalling/unmarshalling usingprintf like strings to represent protocol elements. It is my intent to usethem to replace the current functions in conv.c as well as the p9_create_* functions.This should make the client implementation much more clear, and also make itmuch easier to add new protocol extensions by limiting the number of placesin which changes need to be made.Signed-off-by: Eric Van Hensbergen List of files: /linux-6.15/net/9p/protocol.h