kernel/linux.git/include/net/9p, branch v5.15.85

9p: Add client parameter to p9_req_put()

2022-08-17T12:24:07+00:00

[ Upstream commit 8b11ff098af42b1fa57fc817daadd53c8b244a0c ] This is to aid in adding mempools, in the next patch. Link: https://lkml.kernel.org/r/20220704014243.153050-2-kent.overstreet@gmail.com Signed-off-by: Kent Overstreet Cc: Eric Van Hensbergen Cc: Latchesar Ionkov Signed-off-by: Dominique Martinet Signed-off-by: Sasha Levin

9p: Drop kref usage

2022-08-17T12:24:07+00:00

[ Upstream commit 6cda12864cb0f99810a5809e11e3ee5b102c9a47 ] An upcoming patch is going to require passing the client through p9_req_put() -> p9_req_free(), but that's awkward with the kref indirection - so this patch switches to using refcount_t directly. Link: https://lkml.kernel.org/r/20220704014243.153050-1-kent.overstreet@gmail.com Signed-off-by: Kent Overstreet Cc: Eric Van Hensbergen Cc: Latchesar Ionkov Signed-off-by: Dominique Martinet Signed-off-by: Sasha Levin

9p: fix a bunch of checkpatch warnings

2022-08-17T12:24:07+00:00

[ Upstream commit 6e195b0f7c8e50927fa31946369c22a0534ec7e2 ] Sohaib Mohamed started a serie of tiny and incomplete checkpatch fixes but seemingly stopped halfway -- take over and do most of it. This is still missing net/9p/trans* and net/9p/protocol.c for a later time... Link: http://lkml.kernel.org/r/20211102134608.1588018-3-dominique.martinet@atmark-techno.com Signed-off-by: Dominique Martinet Signed-off-by: Sasha Levin

9p: apply review requests for fid refcounting

2020-11-19T16:21:34+00:00

Fix style issues in parent commit ("apply review requests for fid refcounting"), no functional change. Link: http://lkml.kernel.org/r/1605802012-31133-2-git-send-email-asmadeus@codewreck.org Fixes: 6636b6dcc3db ("9p: add refcount to p9_fid struct") Signed-off-by: Dominique Martinet

9p: add refcount to p9_fid struct

2020-11-19T16:20:39+00:00

Fix race issue in fid contention. Eric's and Greg's patch offer a mechanism to fix open-unlink-f*syscall bug in 9p. But there is race issue in fid parallel accesses. As Greg's patch stores all of fids from opened files into according inode, so all the lookup fid ops can retrieve fid from inode preferentially. But there is no mechanism to handle the fid contention issue. For example, there are two threads get the same fid in the same time and one of them clunk the fid before the other thread ready to discard the fid. In this scenario, it will lead to some fatal problems, even kernel core dump. I introduce a mechanism to fix this race issue. A counter field introduced into p9_fid struct to store the reference counter to the fid. When a fid is allocated from the inode or dentry, the counter will increase, and will decrease at the end of its occupation. It is guaranteed that the fid won't be clunked before the reference counter go down to 0, then we can avoid the clunked fid to be used. tests: race issue test from the old test case: for file in {01..50}; do touch f.${file}; done seq 1 1000 | xargs -n 1 -P 50 -I{} cat f.* > /dev/null open-unlink-f*syscall test: I have tested for f*syscall include: ftruncate fstat fchown fchmod faccessat. Link: http://lkml.kernel.org/r/20200923141146.90046-5-jianyong.wu@arm.com Fixes: 478ba09edc1f ("fs/9p: search open fids first") Signed-off-by: Jianyong Wu Signed-off-by: Dominique Martinet

fs/9p: track open fids

2020-11-03T08:29:46+00:00

This patch adds accounting of open fids in a list hanging off the i_private field of the corresponding inode. This allows faster lookups compared to searching the full 9p client list. The lookup code is modified accordingly. Link: http://lkml.kernel.org/r/20200923141146.90046-3-jianyong.wu@arm.com Signed-off-by: Greg Kurz Signed-off-by: Jianyong Wu Signed-off-by: Dominique Martinet

net: 9p: drop duplicate word in comment

2020-07-16T03:34:11+00:00

Drop doubled word "not" in a comment. Signed-off-by: Randy Dunlap Cc: "David S. Miller" Cc: netdev@vger.kernel.org Signed-off-by: Jakub Kicinski

net/9p: remove unused p9_req_t aux field

2020-03-27T09:29:57+00:00

The p9_req_t field 'aux' has not been used in a very long time, remove leftover field declaration Link: http://lkml.kernel.org/r/1580941152-12973-1-git-send-email-asmadeus@codewreck.org Signed-off-by: Dominique Martinet

9pnet: allow making incomplete read requests

2020-03-27T09:29:56+00:00

A user doesn't necessarily want to wait for all the requested data to be available, since the waiting time for each request is unbounded. The new method permits sending one read request at a time and getting the response ASAP, allowing to use 9pnet with synthetic file systems representing arbitrary data streams. Link: http://lkml.kernel.org/r/20200205204053.12751-1-l29ah@cock.li Signed-off-by: Sergey Alirzaev Signed-off-by: Dominique Martinet

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

2019-05-30T18:29:21+00:00

Based 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 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has 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.org Link: https://lkml.kernel.org/r/20190528170026.981318839@linutronix.de Signed-off-by: Greg Kroah-Hartman