| 1f3e4142 | 10-Oct-2025 |
Eric Sandeen <sandeen@redhat.com> |
9p: convert to the new mount API
Convert 9p to the new mount API. This patch consolidates all parsing
into fs/9p/v9fs.c, which stores all results into a filesystem context
which can be passed to the
9p: convert to the new mount API
Convert 9p to the new mount API. This patch consolidates all parsing
into fs/9p/v9fs.c, which stores all results into a filesystem context
which can be passed to the various transports as needed.
Some of the parsing helper functions such as get_cache_mode() have been
eliminated in favor of using the new mount API's enum param type,
for simplicity.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Message-ID: <20251010214222.1347785-5-sandeen@redhat.com>
[ Dominique: handled source explicitly as per follow-up discussion ]
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
show more ...
|
| 075e8bd4 | 10-Oct-2025 |
Eric Sandeen <sandeen@redhat.com> |
9p: create a v9fs_context structure to hold parsed options
This patch creates a new v9fs_context structure which includes
new p9_session_opts and p9_client_opts structures, as well as
re-using the e
9p: create a v9fs_context structure to hold parsed options
This patch creates a new v9fs_context structure which includes
new p9_session_opts and p9_client_opts structures, as well as
re-using the existing p9_fd_opts and p9_rdma_opts to store options
during parsing. The new structure will be used in the next
commit to pass all parsed options to the appropriate transports.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Message-ID: <20251010214222.1347785-4-sandeen@redhat.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
show more ...
|
| c44393d8 | 10-Oct-2025 |
Eric Sandeen <sandeen@redhat.com> |
net/9p: move structures and macros to header files
With the new mount API all option parsing will need to happen
in fs/v9fs.c, so move some existing data structures and macros
to header files to fac
net/9p: move structures and macros to header files
With the new mount API all option parsing will need to happen
in fs/v9fs.c, so move some existing data structures and macros
to header files to facilitate this. Rename some to reflect
the transport they are used for (rdma, fd, etc), for clarity.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Message-ID: <20251010214222.1347785-3-sandeen@redhat.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
show more ...
|
| 8b11ff09 | 04-Jul-2022 |
Kent Overstreet <kent.overstreet@gmail.com> |
9p: Add client parameter to p9_req_put()
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
9p: Add client parameter to p9_req_put()
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 <kent.overstreet@gmail.com>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
show more ...
|
| 6cda1286 | 04-Jul-2022 |
Kent Overstreet <kent.overstreet@gmail.com> |
9p: Drop kref usage
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 ref
9p: Drop kref usage
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 <kent.overstreet@gmail.com>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
show more ...
|
| 286c171b | 13-Jun-2022 |
Dominique Martinet <asmadeus@codewreck.org> |
9p fid refcount: add a 9p_fid_ref tracepoint
This adds a tracepoint event for 9p fid lifecycle tracing: when a fid
is created, its reference count increased/decreased, and freed.
The new 9p_fid_ref
9p fid refcount: add a 9p_fid_ref tracepoint
This adds a tracepoint event for 9p fid lifecycle tracing: when a fid
is created, its reference count increased/decreased, and freed.
The new 9p_fid_ref tracepoint should help anyone wishing to debug any
fid problem such as missing clunk (destroy) or use-after-free.
Link: https://lkml.kernel.org/r/20220612085330.1451496-6-asmadeus@codewreck.org
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
show more ...
|
| 019641d1 | 03-Nov-2021 |
Thomas Weißschuh <linux@weissschuh.net> |
net/p9: load default transports
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 l
net/p9: load default transports
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 <linux@weissschuh.net>
[Dominique: constify v9fs_get_trans_by_name argument as per patch1v2]
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
show more ...
|
| ff5e72eb | 03-Nov-2020 |
Dominique Martinet <asmadeus@codewreck.org> |
9p: apply review requests for fid refcounting
Fix style issues in parent commit ("apply review requests for fid
refcounting"), no functional change.
Link: http://lkml.kernel.org/r/1605802012-31133-
9p: apply review requests for fid refcounting
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 <asmadeus@codewreck.org>
show more ...
|
| 6636b6dc | 23-Sep-2020 |
Jianyong Wu <jianyong.wu@arm.com> |
9p: add refcount to p9_fid struct
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 accesse
9p: add refcount to p9_fid struct
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 <jianyong.wu@arm.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
show more ...
|
| 43657496 | 05-Feb-2020 |
Dominique Martinet <dominique.martinet@cea.fr> |
net/9p: remove unused p9_req_t aux field
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
net/9p: remove unused p9_req_t aux field
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 <dominique.martinet@cea.fr>
show more ...
|