kernel/git/stable/linux.git/include/net/9p, branch linux-5.18.y

9p: Add client parameter to p9_req_put()

2022-08-17T12:42:06+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

2022-08-17T12:42:06+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

net/p9: load default transports

2022-01-10T01:00:09+00:00

Now that all transports are split into modules it may happen that no transports are registered when v9fs_get_default_trans() is called. When that is the case try to load more transports from modules. Link: https://lkml.kernel.org/r/20211103193823.111007-5-linux@weissschuh.net Signed-off-by: Thomas Weißschuh [Dominique: constify v9fs_get_trans_by_name argument as per patch1v2] Signed-off-by: Dominique Martinet

9p/trans_fd: split into dedicated module

2022-01-10T00:58:30+00:00

This allows these transports only to be used when needed. Link: https://lkml.kernel.org/r/20211103193823.111007-3-linux@weissschuh.net Signed-off-by: Thomas Weißschuh [Dominique: Kconfig NET_9P_FD: -depends VIRTIO, +default NET_9P] Signed-off-by: Dominique Martinet

9p: fix a bunch of checkpatch warnings

2021-11-04T12:04:25+00:00

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

9p: fix file headers

2021-11-03T08:45:04+00:00

- add missing SPDX-License-Identifier - remove (sometimes incorrect) file name from file header Link: http://lkml.kernel.org/r/20211102134608.1588018-2-dominique.martinet@atmark-techno.com Signed-off-by: Dominique Martinet

net/9p: autoload transport modules

2021-11-03T00:50:35+00:00

Automatically load transport modules based on the trans= parameter passed to mount. This removes the requirement for the user to know which module to use. Link: http://lkml.kernel.org/r/20211017134611.4330-1-linux@weissschuh.net Signed-off-by: Thomas Weißschuh Signed-off-by: Dominique Martinet

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