2019-05-28 16:57:16 +00:00
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// SPDX-License-Identifier: GPL-2.0-only
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2005-09-09 20:04:20 +00:00
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/*
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* This file contains functions assisting in mapping VFS to 9P2000
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*
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2008-02-07 01:25:03 +00:00
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* Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
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2005-09-09 20:04:20 +00:00
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* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
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*/
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2011-11-28 18:40:46 +00:00
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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2005-09-09 20:04:20 +00:00
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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2006-10-18 17:55:46 +00:00
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#include <linux/sched.h>
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2017-02-02 16:54:15 +00:00
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#include <linux/cred.h>
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2005-09-09 20:04:20 +00:00
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#include <linux/parser.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
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#include <linux/slab.h>
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2017-07-05 15:25:37 +00:00
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#include <linux/seq_file.h>
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2007-07-10 22:57:28 +00:00
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#include <net/9p/9p.h>
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#include <net/9p/client.h>
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2008-10-13 23:45:25 +00:00
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#include <net/9p/transport.h>
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2005-09-09 20:04:20 +00:00
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#include "v9fs.h"
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#include "v9fs_vfs.h"
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2009-09-23 18:00:27 +00:00
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#include "cache.h"
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static DEFINE_SPINLOCK(v9fs_sessionlist_lock);
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static LIST_HEAD(v9fs_sessionlist);
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2011-02-28 11:34:02 +00:00
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struct kmem_cache *v9fs_inode_cache;
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2005-09-09 20:04:20 +00:00
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/*
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2009-09-23 18:00:27 +00:00
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* Option Parsing (code inspired by NFS code)
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* NOTE: each transport will parse its own options
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*/
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2005-09-09 20:04:20 +00:00
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enum {
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/* Options that take integer arguments */
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2008-02-07 01:25:03 +00:00
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Opt_debug, Opt_dfltuid, Opt_dfltgid, Opt_afid,
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2005-09-09 20:04:20 +00:00
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/* String options */
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2015-06-05 17:09:35 +00:00
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Opt_uname, Opt_remotename, Opt_cache, Opt_cachetag,
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2005-09-09 20:04:20 +00:00
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/* Options that take no arguments */
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2022-12-18 20:34:45 +00:00
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Opt_nodevmap, Opt_noxattr, Opt_directio, Opt_ignoreqv,
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2007-10-17 19:31:07 +00:00
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/* Access options */
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2011-01-25 23:40:54 +00:00
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Opt_access, Opt_posixacl,
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2018-09-05 07:44:12 +00:00
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/* Lock timeout option */
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Opt_locktimeout,
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2005-09-09 20:04:20 +00:00
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/* Error token */
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Opt_err
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};
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2008-10-13 09:46:57 +00:00
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static const match_table_t tokens = {
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2007-07-13 18:05:21 +00:00
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{Opt_debug, "debug=%x"},
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2007-10-17 19:31:07 +00:00
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{Opt_dfltuid, "dfltuid=%u"},
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{Opt_dfltgid, "dfltgid=%u"},
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2005-09-09 20:04:20 +00:00
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{Opt_afid, "afid=%u"},
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2006-03-25 11:07:29 +00:00
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{Opt_uname, "uname=%s"},
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2005-09-09 20:04:20 +00:00
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{Opt_remotename, "aname=%s"},
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{Opt_nodevmap, "nodevmap"},
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2022-12-17 17:19:34 +00:00
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{Opt_noxattr, "noxattr"},
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2022-12-18 20:34:45 +00:00
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{Opt_directio, "directio"},
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{Opt_ignoreqv, "ignoreqv"},
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2009-09-23 18:00:27 +00:00
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{Opt_cache, "cache=%s"},
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{Opt_cachetag, "cachetag=%s"},
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2007-10-17 19:31:07 +00:00
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{Opt_access, "access=%s"},
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2011-01-25 23:40:54 +00:00
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{Opt_posixacl, "posixacl"},
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2018-09-05 07:44:12 +00:00
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{Opt_locktimeout, "locktimeout=%u"},
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2005-09-09 20:04:20 +00:00
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{Opt_err, NULL}
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};
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2011-05-06 12:54:18 +00:00
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/* Interpret mount options for cache mode */
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static int get_cache_mode(char *s)
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{
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int version = -EINVAL;
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if (!strcmp(s, "loose")) {
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2023-03-27 01:53:10 +00:00
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version = CACHE_SC_LOOSE;
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2011-11-28 18:40:46 +00:00
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p9_debug(P9_DEBUG_9P, "Cache mode: loose\n");
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2011-05-06 12:54:18 +00:00
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} else if (!strcmp(s, "fscache")) {
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2023-03-27 01:53:10 +00:00
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version = CACHE_SC_FSCACHE;
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2011-11-28 18:40:46 +00:00
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p9_debug(P9_DEBUG_9P, "Cache mode: fscache\n");
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2014-01-10 12:44:09 +00:00
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} else if (!strcmp(s, "mmap")) {
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2023-03-27 01:53:10 +00:00
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version = CACHE_SC_MMAP;
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2014-01-10 12:44:09 +00:00
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p9_debug(P9_DEBUG_9P, "Cache mode: mmap\n");
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2022-12-08 02:40:37 +00:00
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} else if (!strcmp(s, "readahead")) {
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2023-03-27 01:53:10 +00:00
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version = CACHE_SC_READAHEAD;
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2022-12-08 02:40:37 +00:00
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p9_debug(P9_DEBUG_9P, "Cache mode: readahead\n");
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2011-05-06 12:54:18 +00:00
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} else if (!strcmp(s, "none")) {
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2023-03-27 01:53:10 +00:00
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version = CACHE_SC_NONE;
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2011-11-28 18:40:46 +00:00
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p9_debug(P9_DEBUG_9P, "Cache mode: none\n");
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2023-03-27 01:53:10 +00:00
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} else if (kstrtoint(s, 0, &version) != 0) {
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version = -EINVAL;
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pr_info("Unknown Cache mode or invalid value %s\n", s);
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}
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2011-05-06 12:54:18 +00:00
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return version;
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}
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2017-07-05 15:25:37 +00:00
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/*
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* Display the mount options in /proc/mounts.
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*/
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int v9fs_show_options(struct seq_file *m, struct dentry *root)
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{
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struct v9fs_session_info *v9ses = root->d_sb->s_fs_info;
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if (v9ses->debug)
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seq_printf(m, ",debug=%x", v9ses->debug);
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if (!uid_eq(v9ses->dfltuid, V9FS_DEFUID))
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seq_printf(m, ",dfltuid=%u",
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from_kuid_munged(&init_user_ns, v9ses->dfltuid));
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if (!gid_eq(v9ses->dfltgid, V9FS_DEFGID))
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seq_printf(m, ",dfltgid=%u",
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from_kgid_munged(&init_user_ns, v9ses->dfltgid));
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if (v9ses->afid != ~0)
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seq_printf(m, ",afid=%u", v9ses->afid);
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if (strcmp(v9ses->uname, V9FS_DEFUSER) != 0)
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seq_printf(m, ",uname=%s", v9ses->uname);
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if (strcmp(v9ses->aname, V9FS_DEFANAME) != 0)
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seq_printf(m, ",aname=%s", v9ses->aname);
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if (v9ses->nodev)
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seq_puts(m, ",nodevmap");
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if (v9ses->cache)
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2023-03-27 01:53:10 +00:00
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seq_printf(m, ",cache=%x", v9ses->cache);
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2017-07-05 15:25:37 +00:00
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#ifdef CONFIG_9P_FSCACHE
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2023-03-27 01:53:10 +00:00
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if (v9ses->cachetag && (v9ses->cache & CACHE_FSCACHE))
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2017-07-05 15:25:37 +00:00
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seq_printf(m, ",cachetag=%s", v9ses->cachetag);
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#endif
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switch (v9ses->flags & V9FS_ACCESS_MASK) {
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case V9FS_ACCESS_USER:
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seq_puts(m, ",access=user");
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break;
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case V9FS_ACCESS_ANY:
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seq_puts(m, ",access=any");
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break;
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case V9FS_ACCESS_CLIENT:
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seq_puts(m, ",access=client");
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break;
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case V9FS_ACCESS_SINGLE:
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seq_printf(m, ",access=%u",
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from_kuid_munged(&init_user_ns, v9ses->uid));
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break;
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}
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2022-12-18 20:34:45 +00:00
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if (v9ses->flags & V9FS_IGNORE_QV)
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seq_puts(m, ",ignoreqv");
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if (v9ses->flags & V9FS_DIRECT_IO)
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seq_puts(m, ",directio");
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2017-07-05 15:25:37 +00:00
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if (v9ses->flags & V9FS_POSIX_ACL)
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seq_puts(m, ",posixacl");
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2022-12-17 17:19:34 +00:00
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if (v9ses->flags & V9FS_NO_XATTR)
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seq_puts(m, ",noxattr");
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2017-07-05 15:25:37 +00:00
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return p9_show_client_options(m, v9ses->clnt);
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}
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2005-09-09 20:04:20 +00:00
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/**
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* v9fs_parse_options - parse mount options into session structure
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* @v9ses: existing v9fs session information
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2021-10-04 21:07:22 +00:00
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* @opts: The mount option string
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2005-09-09 20:04:20 +00:00
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*
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2008-03-06 23:10:28 +00:00
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* Return 0 upon success, -ERRNO upon failure.
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2005-09-09 20:04:20 +00:00
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*/
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2009-08-17 21:42:28 +00:00
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static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
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2005-09-09 20:04:20 +00:00
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{
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2010-02-08 22:23:23 +00:00
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char *options, *tmp_options;
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2005-09-09 20:04:20 +00:00
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substring_t args[MAX_OPT_ARGS];
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2007-10-17 19:31:07 +00:00
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char *p;
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2008-02-07 01:25:03 +00:00
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int option = 0;
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2021-11-02 13:23:37 +00:00
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char *s;
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2008-03-06 23:10:28 +00:00
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int ret = 0;
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2005-09-09 20:04:20 +00:00
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/* setup defaults */
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v9ses->afid = ~0;
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v9ses->debug = 0;
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2011-05-06 12:54:18 +00:00
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v9ses->cache = CACHE_NONE;
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2009-09-23 18:00:27 +00:00
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#ifdef CONFIG_9P_FSCACHE
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v9ses->cachetag = NULL;
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#endif
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2018-09-05 07:44:12 +00:00
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v9ses->session_lock_timeout = P9_LOCK_TIMEOUT;
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2005-09-09 20:04:20 +00:00
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2009-08-17 21:42:28 +00:00
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if (!opts)
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2008-03-06 23:10:28 +00:00
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return 0;
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2005-09-09 20:04:20 +00:00
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2010-02-08 22:23:23 +00:00
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tmp_options = kstrdup(opts, GFP_KERNEL);
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2010-02-08 23:59:34 +00:00
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if (!tmp_options) {
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ret = -ENOMEM;
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2009-09-23 18:00:27 +00:00
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goto fail_option_alloc;
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2010-02-08 23:59:34 +00:00
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}
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2010-02-08 22:23:23 +00:00
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options = tmp_options;
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2008-03-06 23:10:28 +00:00
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2005-09-09 20:04:20 +00:00
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while ((p = strsep(&options, ",")) != NULL) {
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2011-08-30 06:49:34 +00:00
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int token, r;
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2021-11-02 13:16:43 +00:00
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2005-09-09 20:04:20 +00:00
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if (!*p)
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continue;
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2021-11-02 13:16:43 +00:00
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2005-09-09 20:04:20 +00:00
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token = match_token(p, tokens, args);
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2011-08-30 06:49:34 +00:00
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switch (token) {
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case Opt_debug:
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r = match_int(&args[0], &option);
|
2008-03-06 23:10:28 +00:00
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if (r < 0) {
|
2011-11-28 18:40:46 +00:00
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p9_debug(P9_DEBUG_ERROR,
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"integer field, but no integer?\n");
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2008-03-06 23:10:28 +00:00
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ret = r;
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2018-06-08 00:05:07 +00:00
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} else {
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v9ses->debug = option;
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2007-07-16 21:02:49 +00:00
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#ifdef CONFIG_NET_9P_DEBUG
|
2018-06-08 00:05:07 +00:00
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p9_debug_level = option;
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2007-07-16 21:02:49 +00:00
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#endif
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2018-06-08 00:05:07 +00:00
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}
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2007-07-13 18:05:21 +00:00
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break;
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2008-02-07 01:25:03 +00:00
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2007-10-17 19:31:07 +00:00
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case Opt_dfltuid:
|
2011-08-30 06:49:34 +00:00
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r = match_int(&args[0], &option);
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if (r < 0) {
|
2011-11-28 18:40:46 +00:00
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p9_debug(P9_DEBUG_ERROR,
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"integer field, but no integer?\n");
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2011-08-30 06:49:34 +00:00
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ret = r;
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continue;
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}
|
2013-01-30 19:57:40 +00:00
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v9ses->dfltuid = make_kuid(current_user_ns(), option);
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if (!uid_valid(v9ses->dfltuid)) {
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p9_debug(P9_DEBUG_ERROR,
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|
|
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"uid field, but not a uid?\n");
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ret = -EINVAL;
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}
|
2005-09-09 20:04:20 +00:00
|
|
|
break;
|
2007-10-17 19:31:07 +00:00
|
|
|
case Opt_dfltgid:
|
2011-08-30 06:49:34 +00:00
|
|
|
r = match_int(&args[0], &option);
|
|
|
|
if (r < 0) {
|
2011-11-28 18:40:46 +00:00
|
|
|
p9_debug(P9_DEBUG_ERROR,
|
|
|
|
"integer field, but no integer?\n");
|
2011-08-30 06:49:34 +00:00
|
|
|
ret = r;
|
|
|
|
continue;
|
|
|
|
}
|
2013-01-30 19:57:40 +00:00
|
|
|
v9ses->dfltgid = make_kgid(current_user_ns(), option);
|
|
|
|
if (!gid_valid(v9ses->dfltgid)) {
|
|
|
|
p9_debug(P9_DEBUG_ERROR,
|
|
|
|
"gid field, but not a gid?\n");
|
|
|
|
ret = -EINVAL;
|
|
|
|
}
|
2005-09-09 20:04:20 +00:00
|
|
|
break;
|
|
|
|
case Opt_afid:
|
2011-08-30 06:49:34 +00:00
|
|
|
r = match_int(&args[0], &option);
|
|
|
|
if (r < 0) {
|
2011-11-28 18:40:46 +00:00
|
|
|
p9_debug(P9_DEBUG_ERROR,
|
|
|
|
"integer field, but no integer?\n");
|
2011-08-30 06:49:34 +00:00
|
|
|
ret = r;
|
2018-06-08 00:05:07 +00:00
|
|
|
} else {
|
|
|
|
v9ses->afid = option;
|
2011-08-30 06:49:34 +00:00
|
|
|
}
|
2005-09-09 20:04:20 +00:00
|
|
|
break;
|
2006-03-25 11:07:29 +00:00
|
|
|
case Opt_uname:
|
2012-09-07 11:55:25 +00:00
|
|
|
kfree(v9ses->uname);
|
|
|
|
v9ses->uname = match_strdup(&args[0]);
|
|
|
|
if (!v9ses->uname) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto free_and_return;
|
|
|
|
}
|
2005-09-09 20:04:20 +00:00
|
|
|
break;
|
|
|
|
case Opt_remotename:
|
2012-09-07 11:55:25 +00:00
|
|
|
kfree(v9ses->aname);
|
|
|
|
v9ses->aname = match_strdup(&args[0]);
|
|
|
|
if (!v9ses->aname) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto free_and_return;
|
|
|
|
}
|
2005-09-09 20:04:20 +00:00
|
|
|
break;
|
|
|
|
case Opt_nodevmap:
|
|
|
|
v9ses->nodev = 1;
|
|
|
|
break;
|
2022-12-17 17:19:34 +00:00
|
|
|
case Opt_noxattr:
|
|
|
|
v9ses->flags |= V9FS_NO_XATTR;
|
|
|
|
break;
|
2022-12-18 20:34:45 +00:00
|
|
|
case Opt_directio:
|
|
|
|
v9ses->flags |= V9FS_DIRECT_IO;
|
|
|
|
break;
|
|
|
|
case Opt_ignoreqv:
|
|
|
|
v9ses->flags |= V9FS_IGNORE_QV;
|
|
|
|
break;
|
2009-09-23 18:00:27 +00:00
|
|
|
case Opt_cachetag:
|
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
2017-07-05 15:25:37 +00:00
|
|
|
kfree(v9ses->cachetag);
|
2009-09-23 18:00:27 +00:00
|
|
|
v9ses->cachetag = match_strdup(&args[0]);
|
2018-04-05 23:19:53 +00:00
|
|
|
if (!v9ses->cachetag) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto free_and_return;
|
|
|
|
}
|
2009-09-23 18:00:27 +00:00
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
case Opt_cache:
|
|
|
|
s = match_strdup(&args[0]);
|
2010-02-08 23:59:34 +00:00
|
|
|
if (!s) {
|
|
|
|
ret = -ENOMEM;
|
2011-11-28 18:40:46 +00:00
|
|
|
p9_debug(P9_DEBUG_ERROR,
|
|
|
|
"problem allocating copy of cache arg\n");
|
2010-02-08 23:59:34 +00:00
|
|
|
goto free_and_return;
|
|
|
|
}
|
2018-06-08 00:05:07 +00:00
|
|
|
r = get_cache_mode(s);
|
|
|
|
if (r < 0)
|
|
|
|
ret = r;
|
|
|
|
else
|
|
|
|
v9ses->cache = r;
|
2009-09-23 18:00:27 +00:00
|
|
|
|
|
|
|
kfree(s);
|
|
|
|
break;
|
2007-10-17 19:31:07 +00:00
|
|
|
|
|
|
|
case Opt_access:
|
|
|
|
s = match_strdup(&args[0]);
|
2010-02-08 23:59:34 +00:00
|
|
|
if (!s) {
|
|
|
|
ret = -ENOMEM;
|
2011-11-28 18:40:46 +00:00
|
|
|
p9_debug(P9_DEBUG_ERROR,
|
|
|
|
"problem allocating copy of access arg\n");
|
2010-02-08 23:59:34 +00:00
|
|
|
goto free_and_return;
|
|
|
|
}
|
2009-09-23 18:00:27 +00:00
|
|
|
|
2007-10-17 19:31:07 +00:00
|
|
|
v9ses->flags &= ~V9FS_ACCESS_MASK;
|
|
|
|
if (strcmp(s, "user") == 0)
|
|
|
|
v9ses->flags |= V9FS_ACCESS_USER;
|
|
|
|
else if (strcmp(s, "any") == 0)
|
|
|
|
v9ses->flags |= V9FS_ACCESS_ANY;
|
2010-09-27 18:57:41 +00:00
|
|
|
else if (strcmp(s, "client") == 0) {
|
|
|
|
v9ses->flags |= V9FS_ACCESS_CLIENT;
|
|
|
|
} else {
|
2013-01-30 19:57:40 +00:00
|
|
|
uid_t uid;
|
2021-11-02 13:23:37 +00:00
|
|
|
|
2007-10-17 19:31:07 +00:00
|
|
|
v9ses->flags |= V9FS_ACCESS_SINGLE;
|
2021-11-02 13:23:37 +00:00
|
|
|
r = kstrtouint(s, 10, &uid);
|
|
|
|
if (r) {
|
|
|
|
ret = r;
|
|
|
|
pr_info("Unknown access argument %s: %d\n",
|
|
|
|
s, r);
|
2011-05-06 12:54:18 +00:00
|
|
|
kfree(s);
|
2018-06-08 00:05:07 +00:00
|
|
|
continue;
|
2011-05-06 12:54:18 +00:00
|
|
|
}
|
2013-01-30 19:57:40 +00:00
|
|
|
v9ses->uid = make_kuid(current_user_ns(), uid);
|
|
|
|
if (!uid_valid(v9ses->uid)) {
|
|
|
|
ret = -EINVAL;
|
2018-07-18 02:14:49 +00:00
|
|
|
pr_info("Unknown uid %s\n", s);
|
2013-01-30 19:57:40 +00:00
|
|
|
}
|
2007-10-17 19:31:07 +00:00
|
|
|
}
|
2011-05-06 12:54:18 +00:00
|
|
|
|
2007-10-23 18:48:50 +00:00
|
|
|
kfree(s);
|
2007-10-17 19:31:07 +00:00
|
|
|
break;
|
|
|
|
|
2011-01-25 23:40:54 +00:00
|
|
|
case Opt_posixacl:
|
|
|
|
#ifdef CONFIG_9P_FS_POSIX_ACL
|
|
|
|
v9ses->flags |= V9FS_POSIX_ACL;
|
|
|
|
#else
|
2011-11-28 18:40:46 +00:00
|
|
|
p9_debug(P9_DEBUG_ERROR,
|
|
|
|
"Not defined CONFIG_9P_FS_POSIX_ACL. Ignoring posixacl option\n");
|
2011-01-25 23:40:54 +00:00
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
|
2018-09-05 07:44:12 +00:00
|
|
|
case Opt_locktimeout:
|
|
|
|
r = match_int(&args[0], &option);
|
|
|
|
if (r < 0) {
|
|
|
|
p9_debug(P9_DEBUG_ERROR,
|
|
|
|
"integer field, but no integer?\n");
|
|
|
|
ret = r;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (option < 1) {
|
|
|
|
p9_debug(P9_DEBUG_ERROR,
|
|
|
|
"locktimeout must be a greater than zero integer.\n");
|
|
|
|
ret = -EINVAL;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
v9ses->session_lock_timeout = (long)option * HZ;
|
|
|
|
break;
|
|
|
|
|
2005-09-09 20:04:20 +00:00
|
|
|
default:
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
2010-02-08 22:23:23 +00:00
|
|
|
|
2010-02-08 23:59:34 +00:00
|
|
|
free_and_return:
|
2010-02-08 22:23:23 +00:00
|
|
|
kfree(tmp_options);
|
2009-09-23 18:00:27 +00:00
|
|
|
fail_option_alloc:
|
2010-02-08 23:59:34 +00:00
|
|
|
return ret;
|
2005-09-09 20:04:20 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_session_init - initialize session
|
|
|
|
* @v9ses: session information structure
|
|
|
|
* @dev_name: device being mounted
|
|
|
|
* @data: options
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
|
2005-09-09 20:04:20 +00:00
|
|
|
const char *dev_name, char *data)
|
|
|
|
{
|
2007-07-10 22:57:28 +00:00
|
|
|
struct p9_fid *fid;
|
2015-06-08 05:57:31 +00:00
|
|
|
int rc = -ENOMEM;
|
2005-09-09 20:04:20 +00:00
|
|
|
|
2012-09-07 11:55:25 +00:00
|
|
|
v9ses->uname = kstrdup(V9FS_DEFUSER, GFP_KERNEL);
|
2007-10-17 19:31:07 +00:00
|
|
|
if (!v9ses->uname)
|
2015-06-08 05:57:31 +00:00
|
|
|
goto err_names;
|
2005-09-09 20:04:20 +00:00
|
|
|
|
2012-09-07 11:55:25 +00:00
|
|
|
v9ses->aname = kstrdup(V9FS_DEFANAME, GFP_KERNEL);
|
2015-06-08 05:57:31 +00:00
|
|
|
if (!v9ses->aname)
|
|
|
|
goto err_names;
|
2010-06-30 13:48:50 +00:00
|
|
|
init_rwsem(&v9ses->rename_sem);
|
2005-09-09 20:04:20 +00:00
|
|
|
|
2013-01-30 19:57:40 +00:00
|
|
|
v9ses->uid = INVALID_UID;
|
2007-10-17 19:31:07 +00:00
|
|
|
v9ses->dfltuid = V9FS_DEFUID;
|
|
|
|
v9ses->dfltgid = V9FS_DEFGID;
|
2008-03-06 23:10:28 +00:00
|
|
|
|
2009-08-17 21:42:28 +00:00
|
|
|
v9ses->clnt = p9_client_create(dev_name, data);
|
2007-07-10 22:57:28 +00:00
|
|
|
if (IS_ERR(v9ses->clnt)) {
|
2015-06-08 05:57:31 +00:00
|
|
|
rc = PTR_ERR(v9ses->clnt);
|
2011-11-28 18:40:46 +00:00
|
|
|
p9_debug(P9_DEBUG_ERROR, "problem initializing 9p client\n");
|
2017-04-12 10:24:31 +00:00
|
|
|
goto err_names;
|
2005-09-09 20:04:20 +00:00
|
|
|
}
|
|
|
|
|
2011-01-27 00:20:35 +00:00
|
|
|
v9ses->flags = V9FS_ACCESS_USER;
|
|
|
|
|
|
|
|
if (p9_is_proto_dotl(v9ses->clnt)) {
|
|
|
|
v9ses->flags = V9FS_ACCESS_CLIENT;
|
2010-03-17 17:02:38 +00:00
|
|
|
v9ses->flags |= V9FS_PROTO_2000L;
|
2011-01-27 00:20:35 +00:00
|
|
|
} else if (p9_is_proto_dotu(v9ses->clnt)) {
|
2010-03-17 17:02:38 +00:00
|
|
|
v9ses->flags |= V9FS_PROTO_2000U;
|
2011-01-27 00:20:35 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
rc = v9fs_parse_options(v9ses, data);
|
2015-06-08 05:57:31 +00:00
|
|
|
if (rc < 0)
|
|
|
|
goto err_clnt;
|
2007-10-17 19:31:07 +00:00
|
|
|
|
2008-10-14 01:36:16 +00:00
|
|
|
v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ;
|
2008-02-07 01:25:03 +00:00
|
|
|
|
2010-09-27 18:57:41 +00:00
|
|
|
if (!v9fs_proto_dotl(v9ses) &&
|
|
|
|
((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) {
|
|
|
|
/*
|
|
|
|
* We support ACCESS_CLIENT only for dotl.
|
|
|
|
* Fall back to ACCESS_USER
|
|
|
|
*/
|
|
|
|
v9ses->flags &= ~V9FS_ACCESS_MASK;
|
|
|
|
v9ses->flags |= V9FS_ACCESS_USER;
|
|
|
|
}
|
|
|
|
/*FIXME !! */
|
2007-10-17 19:31:07 +00:00
|
|
|
/* for legacy mode, fall back to V9FS_ACCESS_ANY */
|
2010-06-01 09:26:18 +00:00
|
|
|
if (!(v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) &&
|
2007-10-17 19:31:07 +00:00
|
|
|
((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) {
|
|
|
|
|
|
|
|
v9ses->flags &= ~V9FS_ACCESS_MASK;
|
|
|
|
v9ses->flags |= V9FS_ACCESS_ANY;
|
2013-01-30 19:57:40 +00:00
|
|
|
v9ses->uid = INVALID_UID;
|
2007-10-17 19:31:07 +00:00
|
|
|
}
|
2011-01-25 23:40:54 +00:00
|
|
|
if (!v9fs_proto_dotl(v9ses) ||
|
|
|
|
!((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) {
|
|
|
|
/*
|
|
|
|
* We support ACL checks on clinet only if the protocol is
|
|
|
|
* 9P2000.L and access is V9FS_ACCESS_CLIENT.
|
|
|
|
*/
|
|
|
|
v9ses->flags &= ~V9FS_ACL_MASK;
|
|
|
|
}
|
2007-10-17 19:31:07 +00:00
|
|
|
|
2013-01-30 00:09:41 +00:00
|
|
|
fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, INVALID_UID,
|
2007-10-17 19:31:07 +00:00
|
|
|
v9ses->aname);
|
2007-07-10 22:57:28 +00:00
|
|
|
if (IS_ERR(fid)) {
|
2015-06-08 05:57:31 +00:00
|
|
|
rc = PTR_ERR(fid);
|
2011-11-28 18:40:46 +00:00
|
|
|
p9_debug(P9_DEBUG_ERROR, "cannot attach\n");
|
2015-06-08 05:57:31 +00:00
|
|
|
goto err_clnt;
|
2005-09-09 20:04:20 +00:00
|
|
|
}
|
|
|
|
|
2007-10-17 19:31:07 +00:00
|
|
|
if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_SINGLE)
|
|
|
|
fid->uid = v9ses->uid;
|
|
|
|
else
|
2013-01-30 19:48:53 +00:00
|
|
|
fid->uid = INVALID_UID;
|
2007-10-17 19:31:07 +00:00
|
|
|
|
2009-09-23 18:00:27 +00:00
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
/* register the session for caching */
|
2023-03-27 01:53:10 +00:00
|
|
|
if (v9ses->cache & CACHE_FSCACHE) {
|
2020-11-18 09:06:42 +00:00
|
|
|
rc = v9fs_cache_session_get_cookie(v9ses, dev_name);
|
|
|
|
if (rc < 0)
|
|
|
|
goto err_clnt;
|
|
|
|
}
|
2009-09-23 18:00:27 +00:00
|
|
|
#endif
|
2015-06-08 05:57:31 +00:00
|
|
|
spin_lock(&v9fs_sessionlist_lock);
|
|
|
|
list_add(&v9ses->slist, &v9fs_sessionlist);
|
|
|
|
spin_unlock(&v9fs_sessionlist_lock);
|
2009-09-23 18:00:27 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
return fid;
|
2005-09-09 20:04:20 +00:00
|
|
|
|
2015-06-08 05:57:31 +00:00
|
|
|
err_clnt:
|
2018-04-05 23:19:53 +00:00
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
kfree(v9ses->cachetag);
|
|
|
|
#endif
|
2015-06-08 05:57:31 +00:00
|
|
|
p9_client_destroy(v9ses->clnt);
|
|
|
|
err_names:
|
|
|
|
kfree(v9ses->uname);
|
|
|
|
kfree(v9ses->aname);
|
|
|
|
return ERR_PTR(rc);
|
2005-09-09 20:04:20 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_session_close - shutdown a session
|
|
|
|
* @v9ses: session information structure
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
void v9fs_session_close(struct v9fs_session_info *v9ses)
|
|
|
|
{
|
2007-07-10 22:57:28 +00:00
|
|
|
if (v9ses->clnt) {
|
|
|
|
p9_client_destroy(v9ses->clnt);
|
|
|
|
v9ses->clnt = NULL;
|
2006-01-08 09:04:58 +00:00
|
|
|
}
|
2005-09-09 20:04:20 +00:00
|
|
|
|
2009-09-23 18:00:27 +00:00
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
2020-11-18 09:06:42 +00:00
|
|
|
fscache_relinquish_volume(v9fs_session_cache(v9ses), NULL, false);
|
2020-06-15 01:21:53 +00:00
|
|
|
kfree(v9ses->cachetag);
|
2009-09-23 18:00:27 +00:00
|
|
|
#endif
|
2012-09-07 11:55:25 +00:00
|
|
|
kfree(v9ses->uname);
|
|
|
|
kfree(v9ses->aname);
|
2009-09-23 18:00:27 +00:00
|
|
|
|
|
|
|
spin_lock(&v9fs_sessionlist_lock);
|
|
|
|
list_del(&v9ses->slist);
|
|
|
|
spin_unlock(&v9fs_sessionlist_lock);
|
2005-09-09 20:04:20 +00:00
|
|
|
}
|
|
|
|
|
2005-09-09 20:04:23 +00:00
|
|
|
/**
|
2008-03-05 13:08:09 +00:00
|
|
|
* v9fs_session_cancel - terminate a session
|
|
|
|
* @v9ses: session to terminate
|
|
|
|
*
|
|
|
|
* mark transport as disconnected and cancel all pending requests.
|
2005-09-09 20:04:23 +00:00
|
|
|
*/
|
2008-03-05 13:08:09 +00:00
|
|
|
|
2021-10-01 06:24:54 +00:00
|
|
|
void v9fs_session_cancel(struct v9fs_session_info *v9ses)
|
|
|
|
{
|
2011-11-28 18:40:46 +00:00
|
|
|
p9_debug(P9_DEBUG_ERROR, "cancel session %p\n", v9ses);
|
2007-07-10 22:57:28 +00:00
|
|
|
p9_client_disconnect(v9ses->clnt);
|
2005-09-09 20:04:23 +00:00
|
|
|
}
|
|
|
|
|
2010-03-29 23:13:59 +00:00
|
|
|
/**
|
|
|
|
* v9fs_session_begin_cancel - Begin terminate of a session
|
|
|
|
* @v9ses: session to terminate
|
|
|
|
*
|
|
|
|
* After this call we don't allow any request other than clunk.
|
|
|
|
*/
|
|
|
|
|
|
|
|
void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses)
|
|
|
|
{
|
2011-11-28 18:40:46 +00:00
|
|
|
p9_debug(P9_DEBUG_ERROR, "begin cancel session %p\n", v9ses);
|
2010-03-29 23:13:59 +00:00
|
|
|
p9_client_begin_disconnect(v9ses->clnt);
|
|
|
|
}
|
|
|
|
|
2005-09-09 20:04:20 +00:00
|
|
|
extern int v9fs_error_init(void);
|
|
|
|
|
2009-09-23 18:00:27 +00:00
|
|
|
static struct kobject *v9fs_kobj;
|
|
|
|
|
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
2021-10-04 21:07:22 +00:00
|
|
|
/*
|
|
|
|
* List caches associated with a session
|
2009-09-23 18:00:27 +00:00
|
|
|
*/
|
|
|
|
static ssize_t caches_show(struct kobject *kobj,
|
|
|
|
struct kobj_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
|
|
|
ssize_t n = 0, count = 0, limit = PAGE_SIZE;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
|
|
|
|
spin_lock(&v9fs_sessionlist_lock);
|
|
|
|
list_for_each_entry(v9ses, &v9fs_sessionlist, slist) {
|
|
|
|
if (v9ses->cachetag) {
|
|
|
|
n = snprintf(buf, limit, "%s\n", v9ses->cachetag);
|
|
|
|
if (n < 0) {
|
|
|
|
count = n;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
count += n;
|
|
|
|
limit -= n;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock(&v9fs_sessionlist_lock);
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct kobj_attribute v9fs_attr_cache = __ATTR_RO(caches);
|
|
|
|
#endif /* CONFIG_9P_FSCACHE */
|
|
|
|
|
|
|
|
static struct attribute *v9fs_attrs[] = {
|
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
&v9fs_attr_cache.attr,
|
|
|
|
#endif
|
|
|
|
NULL,
|
|
|
|
};
|
|
|
|
|
2021-01-08 22:46:50 +00:00
|
|
|
static const struct attribute_group v9fs_attr_group = {
|
2009-09-23 18:00:27 +00:00
|
|
|
.attrs = v9fs_attrs,
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_sysfs_init - Initialize the v9fs sysfs interface
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2014-06-04 23:06:25 +00:00
|
|
|
static int __init v9fs_sysfs_init(void)
|
2009-09-23 18:00:27 +00:00
|
|
|
{
|
|
|
|
v9fs_kobj = kobject_create_and_add("9p", fs_kobj);
|
|
|
|
if (!v9fs_kobj)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
if (sysfs_create_group(v9fs_kobj, &v9fs_attr_group)) {
|
|
|
|
kobject_put(v9fs_kobj);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_sysfs_cleanup - Unregister the v9fs sysfs interface
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void v9fs_sysfs_cleanup(void)
|
|
|
|
{
|
|
|
|
sysfs_remove_group(v9fs_kobj, &v9fs_attr_group);
|
|
|
|
kobject_put(v9fs_kobj);
|
|
|
|
}
|
|
|
|
|
2011-02-28 11:34:02 +00:00
|
|
|
static void v9fs_inode_init_once(void *foo)
|
|
|
|
{
|
|
|
|
struct v9fs_inode *v9inode = (struct v9fs_inode *)foo;
|
2021-06-29 21:37:05 +00:00
|
|
|
|
2011-07-11 16:40:59 +00:00
|
|
|
memset(&v9inode->qid, 0, sizeof(v9inode->qid));
|
netfs: Fix gcc-12 warning by embedding vfs inode in netfs_i_context
While randstruct was satisfied with using an open-coded "void *" offset
cast for the netfs_i_context <-> inode casting, __builtin_object_size() as
used by FORTIFY_SOURCE was not as easily fooled. This was causing the
following complaint[1] from gcc v12:
In file included from include/linux/string.h:253,
from include/linux/ceph/ceph_debug.h:7,
from fs/ceph/inode.c:2:
In function 'fortify_memset_chk',
inlined from 'netfs_i_context_init' at include/linux/netfs.h:326:2,
inlined from 'ceph_alloc_inode' at fs/ceph/inode.c:463:2:
include/linux/fortify-string.h:242:25: warning: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Wattribute-warning]
242 | __write_overflow_field(p_size_field, size);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fix this by embedding a struct inode into struct netfs_i_context (which
should perhaps be renamed to struct netfs_inode). The struct inode
vfs_inode fields are then removed from the 9p, afs, ceph and cifs inode
structs and vfs_inode is then simply changed to "netfs.inode" in those
filesystems.
Further, rename netfs_i_context to netfs_inode, get rid of the
netfs_inode() function that converted a netfs_i_context pointer to an
inode pointer (that can now be done with &ctx->inode) and rename the
netfs_i_context() function to netfs_inode() (which is now a wrapper
around container_of()).
Most of the changes were done with:
perl -p -i -e 's/vfs_inode/netfs.inode/'g \
`git grep -l 'vfs_inode' -- fs/{9p,afs,ceph,cifs}/*.[ch]`
Kees suggested doing it with a pair structure[2] and a special
declarator to insert that into the network filesystem's inode
wrapper[3], but I think it's cleaner to embed it - and then it doesn't
matter if struct randomisation reorders things.
Dave Chinner suggested using a filesystem-specific VFS_I() function in
each filesystem to convert that filesystem's own inode wrapper struct
into the VFS inode struct[4].
Version #2:
- Fix a couple of missed name changes due to a disabled cifs option.
- Rename nfs_i_context to nfs_inode
- Use "netfs" instead of "nic" as the member name in per-fs inode wrapper
structs.
[ This also undoes commit 507160f46c55 ("netfs: gcc-12: temporarily
disable '-Wattribute-warning' for now") that is no longer needed ]
Fixes: bc899ee1c898 ("netfs: Add a netfs inode context")
Reported-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
cc: Jonathan Corbet <corbet@lwn.net>
cc: Eric Van Hensbergen <ericvh@gmail.com>
cc: Latchesar Ionkov <lucho@ionkov.net>
cc: Dominique Martinet <asmadeus@codewreck.org>
cc: Christian Schoenebeck <linux_oss@crudebyte.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Ilya Dryomov <idryomov@gmail.com>
cc: Steve French <smfrench@gmail.com>
cc: William Kucharski <william.kucharski@oracle.com>
cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
cc: Dave Chinner <david@fromorbit.com>
cc: linux-doc@vger.kernel.org
cc: v9fs-developer@lists.sourceforge.net
cc: linux-afs@lists.infradead.org
cc: ceph-devel@vger.kernel.org
cc: linux-cifs@vger.kernel.org
cc: samba-technical@lists.samba.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-hardening@vger.kernel.org
Link: https://lore.kernel.org/r/d2ad3a3d7bdd794c6efb562d2f2b655fb67756b9.camel@kernel.org/ [1]
Link: https://lore.kernel.org/r/20220517210230.864239-1-keescook@chromium.org/ [2]
Link: https://lore.kernel.org/r/20220518202212.2322058-1-keescook@chromium.org/ [3]
Link: https://lore.kernel.org/r/20220524101205.GI2306852@dread.disaster.area/ [4]
Link: https://lore.kernel.org/r/165296786831.3591209.12111293034669289733.stgit@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/165305805651.4094995.7763502506786714216.stgit@warthog.procyon.org.uk # v2
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-06-09 20:46:04 +00:00
|
|
|
inode_init_once(&v9inode->netfs.inode);
|
2011-02-28 11:34:02 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_init_inode_cache - initialize a cache for 9P
|
|
|
|
* Returns 0 on success.
|
|
|
|
*/
|
|
|
|
static int v9fs_init_inode_cache(void)
|
|
|
|
{
|
|
|
|
v9fs_inode_cache = kmem_cache_create("v9fs_inode_cache",
|
|
|
|
sizeof(struct v9fs_inode),
|
|
|
|
0, (SLAB_RECLAIM_ACCOUNT|
|
2016-01-14 23:18:21 +00:00
|
|
|
SLAB_MEM_SPREAD|SLAB_ACCOUNT),
|
2011-02-28 11:34:02 +00:00
|
|
|
v9fs_inode_init_once);
|
|
|
|
if (!v9fs_inode_cache)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_destroy_inode_cache - destroy the cache of 9P inode
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static void v9fs_destroy_inode_cache(void)
|
|
|
|
{
|
2012-09-26 01:33:07 +00:00
|
|
|
/*
|
|
|
|
* Make sure all delayed rcu free inodes are flushed before we
|
|
|
|
* destroy cache.
|
|
|
|
*/
|
|
|
|
rcu_barrier();
|
2011-02-28 11:34:02 +00:00
|
|
|
kmem_cache_destroy(v9fs_inode_cache);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int v9fs_cache_register(void)
|
|
|
|
{
|
|
|
|
int ret;
|
2021-11-02 13:16:43 +00:00
|
|
|
|
2011-02-28 11:34:02 +00:00
|
|
|
ret = v9fs_init_inode_cache();
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
2013-09-17 12:10:18 +00:00
|
|
|
return ret;
|
2011-02-28 11:34:02 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void v9fs_cache_unregister(void)
|
|
|
|
{
|
|
|
|
v9fs_destroy_inode_cache();
|
|
|
|
}
|
|
|
|
|
2009-09-23 18:00:27 +00:00
|
|
|
/**
|
|
|
|
* init_v9fs - Initialize module
|
2005-09-09 20:04:20 +00:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int __init init_v9fs(void)
|
|
|
|
{
|
2009-09-23 18:00:27 +00:00
|
|
|
int err;
|
2021-11-02 13:16:43 +00:00
|
|
|
|
2011-11-28 18:40:46 +00:00
|
|
|
pr_info("Installing v9fs 9p2000 file system support\n");
|
2007-10-17 19:31:07 +00:00
|
|
|
/* TODO: Setup list of registered trasnport modules */
|
2009-09-23 18:00:27 +00:00
|
|
|
|
|
|
|
err = v9fs_cache_register();
|
|
|
|
if (err < 0) {
|
2011-11-28 18:40:46 +00:00
|
|
|
pr_err("Failed to register v9fs for caching\n");
|
2012-03-17 06:37:05 +00:00
|
|
|
return err;
|
2009-09-23 18:00:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
err = v9fs_sysfs_init();
|
|
|
|
if (err < 0) {
|
2011-11-28 18:40:46 +00:00
|
|
|
pr_err("Failed to register with sysfs\n");
|
2012-03-17 06:37:05 +00:00
|
|
|
goto out_cache;
|
|
|
|
}
|
|
|
|
err = register_filesystem(&v9fs_fs_type);
|
|
|
|
if (err < 0) {
|
|
|
|
pr_err("Failed to register filesystem\n");
|
2009-09-23 18:00:27 +00:00
|
|
|
goto out_sysfs_cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_sysfs_cleanup:
|
|
|
|
v9fs_sysfs_cleanup();
|
|
|
|
|
2012-03-17 06:37:05 +00:00
|
|
|
out_cache:
|
|
|
|
v9fs_cache_unregister();
|
2009-09-23 18:00:27 +00:00
|
|
|
|
|
|
|
return err;
|
2005-09-09 20:04:20 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-09-23 18:00:27 +00:00
|
|
|
* exit_v9fs - shutdown module
|
2005-09-09 20:04:20 +00:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void __exit exit_v9fs(void)
|
|
|
|
{
|
2009-09-23 18:00:27 +00:00
|
|
|
v9fs_sysfs_cleanup();
|
|
|
|
v9fs_cache_unregister();
|
2005-09-09 20:04:20 +00:00
|
|
|
unregister_filesystem(&v9fs_fs_type);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(init_v9fs)
|
|
|
|
module_exit(exit_v9fs)
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
|
2005-09-09 20:04:20 +00:00
|
|
|
MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
|
|
|
|
MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>");
|
|
|
|
MODULE_LICENSE("GPL");
|