2005-09-10 03:04:20 +07:00
|
|
|
/*
|
|
|
|
* linux/fs/9p/v9fs.c
|
|
|
|
*
|
|
|
|
* This file contains functions assisting in mapping VFS to 9P2000
|
|
|
|
*
|
2008-02-07 08:25:03 +07:00
|
|
|
* Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
|
2005-09-10 03:04:20 +07:00
|
|
|
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
2006-03-25 18:07:28 +07:00
|
|
|
* it under the terms of the GNU General Public License version 2
|
|
|
|
* as published by the Free Software Foundation.
|
2005-09-10 03:04:20 +07:00
|
|
|
*
|
|
|
|
* 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
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|
|
|
* Boston, MA 02111-1301 USA
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/fs.h>
|
2006-10-19 00:55:46 +07:00
|
|
|
#include <linux/sched.h>
|
2005-09-10 03:04:20 +07:00
|
|
|
#include <linux/parser.h>
|
|
|
|
#include <linux/idr.h>
|
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 15:04:11 +07:00
|
|
|
#include <linux/slab.h>
|
2007-07-11 05:57:28 +07:00
|
|
|
#include <net/9p/9p.h>
|
|
|
|
#include <net/9p/client.h>
|
2008-10-14 06:45:25 +07:00
|
|
|
#include <net/9p/transport.h>
|
2005-09-10 03:04:20 +07:00
|
|
|
#include "v9fs.h"
|
|
|
|
#include "v9fs_vfs.h"
|
2009-09-24 01:00:27 +07:00
|
|
|
#include "cache.h"
|
|
|
|
|
|
|
|
static DEFINE_SPINLOCK(v9fs_sessionlist_lock);
|
|
|
|
static LIST_HEAD(v9fs_sessionlist);
|
2005-09-10 03:04:20 +07:00
|
|
|
|
|
|
|
/*
|
2009-09-24 01:00:27 +07:00
|
|
|
* Option Parsing (code inspired by NFS code)
|
|
|
|
* NOTE: each transport will parse its own options
|
|
|
|
*/
|
2005-09-10 03:04:20 +07:00
|
|
|
|
|
|
|
enum {
|
|
|
|
/* Options that take integer arguments */
|
2008-02-07 08:25:03 +07:00
|
|
|
Opt_debug, Opt_dfltuid, Opt_dfltgid, Opt_afid,
|
2005-09-10 03:04:20 +07:00
|
|
|
/* String options */
|
2009-09-24 01:00:27 +07:00
|
|
|
Opt_uname, Opt_remotename, Opt_trans, Opt_cache, Opt_cachetag,
|
2005-09-10 03:04:20 +07:00
|
|
|
/* Options that take no arguments */
|
2008-02-07 08:25:03 +07:00
|
|
|
Opt_nodevmap,
|
2007-02-12 02:21:39 +07:00
|
|
|
/* Cache options */
|
2009-09-24 01:00:27 +07:00
|
|
|
Opt_cache_loose, Opt_fscache,
|
2007-10-18 02:31:07 +07:00
|
|
|
/* Access options */
|
|
|
|
Opt_access,
|
2005-09-10 03:04:20 +07:00
|
|
|
/* Error token */
|
|
|
|
Opt_err
|
|
|
|
};
|
|
|
|
|
2008-10-13 16:46:57 +07:00
|
|
|
static const match_table_t tokens = {
|
2007-07-14 01:05:21 +07:00
|
|
|
{Opt_debug, "debug=%x"},
|
2007-10-18 02:31:07 +07:00
|
|
|
{Opt_dfltuid, "dfltuid=%u"},
|
|
|
|
{Opt_dfltgid, "dfltgid=%u"},
|
2005-09-10 03:04:20 +07:00
|
|
|
{Opt_afid, "afid=%u"},
|
2006-03-25 18:07:29 +07:00
|
|
|
{Opt_uname, "uname=%s"},
|
2005-09-10 03:04:20 +07:00
|
|
|
{Opt_remotename, "aname=%s"},
|
|
|
|
{Opt_nodevmap, "nodevmap"},
|
2009-09-24 01:00:27 +07:00
|
|
|
{Opt_cache, "cache=%s"},
|
2007-02-12 02:21:39 +07:00
|
|
|
{Opt_cache_loose, "loose"},
|
2009-09-24 01:00:27 +07:00
|
|
|
{Opt_fscache, "fscache"},
|
|
|
|
{Opt_cachetag, "cachetag=%s"},
|
2007-10-18 02:31:07 +07:00
|
|
|
{Opt_access, "access=%s"},
|
2005-09-10 03:04:20 +07:00
|
|
|
{Opt_err, NULL}
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_parse_options - parse mount options into session structure
|
|
|
|
* @v9ses: existing v9fs session information
|
|
|
|
*
|
2008-03-07 06:10:28 +07:00
|
|
|
* Return 0 upon success, -ERRNO upon failure.
|
2005-09-10 03:04:20 +07:00
|
|
|
*/
|
|
|
|
|
2009-08-18 04:42:28 +07:00
|
|
|
static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
|
2005-09-10 03:04:20 +07:00
|
|
|
{
|
2010-02-09 05:23:23 +07:00
|
|
|
char *options, *tmp_options;
|
2005-09-10 03:04:20 +07:00
|
|
|
substring_t args[MAX_OPT_ARGS];
|
2007-10-18 02:31:07 +07:00
|
|
|
char *p;
|
2008-02-07 08:25:03 +07:00
|
|
|
int option = 0;
|
2007-10-18 02:31:07 +07:00
|
|
|
char *s, *e;
|
2008-03-07 06:10:28 +07:00
|
|
|
int ret = 0;
|
2005-09-10 03:04:20 +07:00
|
|
|
|
|
|
|
/* setup defaults */
|
|
|
|
v9ses->afid = ~0;
|
|
|
|
v9ses->debug = 0;
|
2007-02-12 02:21:39 +07:00
|
|
|
v9ses->cache = 0;
|
2009-09-24 01:00:27 +07:00
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
v9ses->cachetag = NULL;
|
|
|
|
#endif
|
2005-09-10 03:04:20 +07:00
|
|
|
|
2009-08-18 04:42:28 +07:00
|
|
|
if (!opts)
|
2008-03-07 06:10:28 +07:00
|
|
|
return 0;
|
2005-09-10 03:04:20 +07:00
|
|
|
|
2010-02-09 05:23:23 +07:00
|
|
|
tmp_options = kstrdup(opts, GFP_KERNEL);
|
2010-02-09 06:59:34 +07:00
|
|
|
if (!tmp_options) {
|
|
|
|
ret = -ENOMEM;
|
2009-09-24 01:00:27 +07:00
|
|
|
goto fail_option_alloc;
|
2010-02-09 06:59:34 +07:00
|
|
|
}
|
2010-02-09 05:23:23 +07:00
|
|
|
options = tmp_options;
|
2008-03-07 06:10:28 +07:00
|
|
|
|
2005-09-10 03:04:20 +07:00
|
|
|
while ((p = strsep(&options, ",")) != NULL) {
|
|
|
|
int token;
|
|
|
|
if (!*p)
|
|
|
|
continue;
|
|
|
|
token = match_token(p, tokens, args);
|
2006-03-25 18:07:29 +07:00
|
|
|
if (token < Opt_uname) {
|
2008-03-07 06:10:28 +07:00
|
|
|
int r = match_int(&args[0], &option);
|
|
|
|
if (r < 0) {
|
2007-07-11 05:57:28 +07:00
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR,
|
2005-09-10 03:04:20 +07:00
|
|
|
"integer field, but no integer?\n");
|
2008-03-07 06:10:28 +07:00
|
|
|
ret = r;
|
2005-09-10 03:04:20 +07:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
switch (token) {
|
2007-07-14 01:05:21 +07:00
|
|
|
case Opt_debug:
|
|
|
|
v9ses->debug = option;
|
2007-07-17 04:02:49 +07:00
|
|
|
#ifdef CONFIG_NET_9P_DEBUG
|
2007-07-14 01:05:21 +07:00
|
|
|
p9_debug_level = option;
|
2007-07-17 04:02:49 +07:00
|
|
|
#endif
|
2007-07-14 01:05:21 +07:00
|
|
|
break;
|
2008-02-07 08:25:03 +07:00
|
|
|
|
2007-10-18 02:31:07 +07:00
|
|
|
case Opt_dfltuid:
|
|
|
|
v9ses->dfltuid = option;
|
2005-09-10 03:04:20 +07:00
|
|
|
break;
|
2007-10-18 02:31:07 +07:00
|
|
|
case Opt_dfltgid:
|
|
|
|
v9ses->dfltgid = option;
|
2005-09-10 03:04:20 +07:00
|
|
|
break;
|
|
|
|
case Opt_afid:
|
|
|
|
v9ses->afid = option;
|
|
|
|
break;
|
2006-03-25 18:07:29 +07:00
|
|
|
case Opt_uname:
|
2008-02-26 22:57:11 +07:00
|
|
|
match_strlcpy(v9ses->uname, &args[0], PATH_MAX);
|
2005-09-10 03:04:20 +07:00
|
|
|
break;
|
|
|
|
case Opt_remotename:
|
2008-02-26 22:57:11 +07:00
|
|
|
match_strlcpy(v9ses->aname, &args[0], PATH_MAX);
|
2005-09-10 03:04:20 +07:00
|
|
|
break;
|
|
|
|
case Opt_nodevmap:
|
|
|
|
v9ses->nodev = 1;
|
|
|
|
break;
|
2007-02-12 02:21:39 +07:00
|
|
|
case Opt_cache_loose:
|
|
|
|
v9ses->cache = CACHE_LOOSE;
|
|
|
|
break;
|
2009-09-24 01:00:27 +07:00
|
|
|
case Opt_fscache:
|
|
|
|
v9ses->cache = CACHE_FSCACHE;
|
|
|
|
break;
|
|
|
|
case Opt_cachetag:
|
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
v9ses->cachetag = match_strdup(&args[0]);
|
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
case Opt_cache:
|
|
|
|
s = match_strdup(&args[0]);
|
2010-02-09 06:59:34 +07:00
|
|
|
if (!s) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR,
|
|
|
|
"problem allocating copy of cache arg\n");
|
|
|
|
goto free_and_return;
|
|
|
|
}
|
2009-09-24 01:00:27 +07:00
|
|
|
|
|
|
|
if (strcmp(s, "loose") == 0)
|
|
|
|
v9ses->cache = CACHE_LOOSE;
|
|
|
|
else if (strcmp(s, "fscache") == 0)
|
|
|
|
v9ses->cache = CACHE_FSCACHE;
|
|
|
|
else
|
|
|
|
v9ses->cache = CACHE_NONE;
|
|
|
|
kfree(s);
|
|
|
|
break;
|
2007-10-18 02:31:07 +07:00
|
|
|
|
|
|
|
case Opt_access:
|
|
|
|
s = match_strdup(&args[0]);
|
2010-02-09 06:59:34 +07:00
|
|
|
if (!s) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR,
|
|
|
|
"problem allocating copy of access arg\n");
|
|
|
|
goto free_and_return;
|
|
|
|
}
|
2009-09-24 01:00:27 +07:00
|
|
|
|
2007-10-18 02:31:07 +07:00
|
|
|
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;
|
|
|
|
else {
|
|
|
|
v9ses->flags |= V9FS_ACCESS_SINGLE;
|
2008-12-20 05:50:22 +07:00
|
|
|
v9ses->uid = simple_strtoul(s, &e, 10);
|
2007-10-18 02:31:07 +07:00
|
|
|
if (*e != '\0')
|
|
|
|
v9ses->uid = ~0;
|
|
|
|
}
|
2007-10-24 01:48:50 +07:00
|
|
|
kfree(s);
|
2007-10-18 02:31:07 +07:00
|
|
|
break;
|
|
|
|
|
2005-09-10 03:04:20 +07:00
|
|
|
default:
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
2010-02-09 05:23:23 +07:00
|
|
|
|
2010-02-09 06:59:34 +07:00
|
|
|
free_and_return:
|
2010-02-09 05:23:23 +07:00
|
|
|
kfree(tmp_options);
|
2009-09-24 01:00:27 +07:00
|
|
|
fail_option_alloc:
|
2010-02-09 06:59:34 +07:00
|
|
|
return ret;
|
2005-09-10 03:04:20 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_session_init - initialize session
|
|
|
|
* @v9ses: session information structure
|
|
|
|
* @dev_name: device being mounted
|
|
|
|
* @data: options
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2007-07-11 05:57:28 +07:00
|
|
|
struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
|
2005-09-10 03:04:20 +07:00
|
|
|
const char *dev_name, char *data)
|
|
|
|
{
|
|
|
|
int retval = -EINVAL;
|
2007-07-11 05:57:28 +07:00
|
|
|
struct p9_fid *fid;
|
2008-03-07 06:10:28 +07:00
|
|
|
int rc;
|
2005-09-10 03:04:20 +07:00
|
|
|
|
2007-10-18 02:31:07 +07:00
|
|
|
v9ses->uname = __getname();
|
|
|
|
if (!v9ses->uname)
|
2007-07-11 05:57:28 +07:00
|
|
|
return ERR_PTR(-ENOMEM);
|
2005-09-10 03:04:20 +07:00
|
|
|
|
2007-10-18 02:31:07 +07:00
|
|
|
v9ses->aname = __getname();
|
|
|
|
if (!v9ses->aname) {
|
|
|
|
__putname(v9ses->uname);
|
2007-07-11 05:57:28 +07:00
|
|
|
return ERR_PTR(-ENOMEM);
|
2005-09-10 03:04:20 +07:00
|
|
|
}
|
|
|
|
|
2010-04-22 16:42:00 +07:00
|
|
|
rc = bdi_setup_and_register(&v9ses->bdi, "9p", BDI_CAP_MAP_COPY);
|
|
|
|
if (rc) {
|
|
|
|
__putname(v9ses->aname);
|
|
|
|
__putname(v9ses->uname);
|
|
|
|
return ERR_PTR(rc);
|
|
|
|
}
|
|
|
|
|
2009-09-24 01:00:27 +07:00
|
|
|
spin_lock(&v9fs_sessionlist_lock);
|
|
|
|
list_add(&v9ses->slist, &v9fs_sessionlist);
|
|
|
|
spin_unlock(&v9fs_sessionlist_lock);
|
|
|
|
|
2010-03-18 00:02:38 +07:00
|
|
|
v9ses->flags = V9FS_ACCESS_USER;
|
2007-10-18 02:31:07 +07:00
|
|
|
strcpy(v9ses->uname, V9FS_DEFUSER);
|
|
|
|
strcpy(v9ses->aname, V9FS_DEFANAME);
|
|
|
|
v9ses->uid = ~0;
|
2007-10-18 02:31:07 +07:00
|
|
|
v9ses->dfltuid = V9FS_DEFUID;
|
|
|
|
v9ses->dfltgid = V9FS_DEFGID;
|
2008-03-07 06:10:28 +07:00
|
|
|
|
2009-08-18 04:42:28 +07:00
|
|
|
rc = v9fs_parse_options(v9ses, data);
|
2008-03-07 06:10:28 +07:00
|
|
|
if (rc < 0) {
|
|
|
|
retval = rc;
|
|
|
|
goto error;
|
|
|
|
}
|
2007-10-18 02:31:07 +07:00
|
|
|
|
2009-08-18 04:42:28 +07:00
|
|
|
v9ses->clnt = p9_client_create(dev_name, data);
|
2007-07-11 05:57:28 +07:00
|
|
|
if (IS_ERR(v9ses->clnt)) {
|
|
|
|
retval = PTR_ERR(v9ses->clnt);
|
|
|
|
v9ses->clnt = NULL;
|
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR, "problem initializing 9p client\n");
|
|
|
|
goto error;
|
2005-09-10 03:04:20 +07:00
|
|
|
}
|
|
|
|
|
2010-03-18 00:02:38 +07:00
|
|
|
if (p9_is_proto_dotl(v9ses->clnt))
|
|
|
|
v9ses->flags |= V9FS_PROTO_2000L;
|
|
|
|
else if (p9_is_proto_dotu(v9ses->clnt))
|
|
|
|
v9ses->flags |= V9FS_PROTO_2000U;
|
2007-10-18 02:31:07 +07:00
|
|
|
|
2008-10-14 08:36:16 +07:00
|
|
|
v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ;
|
2008-02-07 08:25:03 +07:00
|
|
|
|
2007-10-18 02:31:07 +07:00
|
|
|
/* for legacy mode, fall back to V9FS_ACCESS_ANY */
|
2010-03-06 01:48:00 +07:00
|
|
|
if (!v9fs_proto_dotu(v9ses) &&
|
2007-10-18 02:31:07 +07:00
|
|
|
((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) {
|
|
|
|
|
|
|
|
v9ses->flags &= ~V9FS_ACCESS_MASK;
|
|
|
|
v9ses->flags |= V9FS_ACCESS_ANY;
|
|
|
|
v9ses->uid = ~0;
|
|
|
|
}
|
|
|
|
|
|
|
|
fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, ~0,
|
|
|
|
v9ses->aname);
|
2007-07-11 05:57:28 +07:00
|
|
|
if (IS_ERR(fid)) {
|
|
|
|
retval = PTR_ERR(fid);
|
|
|
|
fid = NULL;
|
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR, "cannot attach\n");
|
|
|
|
goto error;
|
2005-09-10 03:04:20 +07:00
|
|
|
}
|
|
|
|
|
2007-10-18 02:31:07 +07:00
|
|
|
if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_SINGLE)
|
|
|
|
fid->uid = v9ses->uid;
|
|
|
|
else
|
|
|
|
fid->uid = ~0;
|
|
|
|
|
2009-09-24 01:00:27 +07:00
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
/* register the session for caching */
|
|
|
|
v9fs_cache_session_get_cookie(v9ses);
|
|
|
|
#endif
|
|
|
|
|
2007-07-11 05:57:28 +07:00
|
|
|
return fid;
|
2005-09-10 03:04:20 +07:00
|
|
|
|
2007-07-11 05:57:28 +07:00
|
|
|
error:
|
2010-04-22 16:42:00 +07:00
|
|
|
bdi_destroy(&v9ses->bdi);
|
2007-07-11 05:57:28 +07:00
|
|
|
return ERR_PTR(retval);
|
2005-09-10 03:04:20 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_session_close - shutdown a session
|
|
|
|
* @v9ses: session information structure
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
void v9fs_session_close(struct v9fs_session_info *v9ses)
|
|
|
|
{
|
2007-07-11 05:57:28 +07:00
|
|
|
if (v9ses->clnt) {
|
|
|
|
p9_client_destroy(v9ses->clnt);
|
|
|
|
v9ses->clnt = NULL;
|
2006-01-08 16:04:58 +07:00
|
|
|
}
|
2005-09-10 03:04:20 +07:00
|
|
|
|
2009-09-24 01:00:27 +07:00
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
if (v9ses->fscache) {
|
|
|
|
v9fs_cache_session_put_cookie(v9ses);
|
|
|
|
kfree(v9ses->cachetag);
|
|
|
|
}
|
|
|
|
#endif
|
2007-10-18 02:31:07 +07:00
|
|
|
__putname(v9ses->uname);
|
|
|
|
__putname(v9ses->aname);
|
2009-09-24 01:00:27 +07:00
|
|
|
|
2010-04-22 16:42:00 +07:00
|
|
|
bdi_destroy(&v9ses->bdi);
|
|
|
|
|
2009-09-24 01:00:27 +07:00
|
|
|
spin_lock(&v9fs_sessionlist_lock);
|
|
|
|
list_del(&v9ses->slist);
|
|
|
|
spin_unlock(&v9fs_sessionlist_lock);
|
2005-09-10 03:04:20 +07:00
|
|
|
}
|
|
|
|
|
2005-09-10 03:04:23 +07:00
|
|
|
/**
|
2008-03-05 20:08:09 +07:00
|
|
|
* v9fs_session_cancel - terminate a session
|
|
|
|
* @v9ses: session to terminate
|
|
|
|
*
|
|
|
|
* mark transport as disconnected and cancel all pending requests.
|
2005-09-10 03:04:23 +07:00
|
|
|
*/
|
2008-03-05 20:08:09 +07:00
|
|
|
|
2005-09-10 03:04:23 +07:00
|
|
|
void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
|
2007-07-11 05:57:28 +07:00
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR, "cancel session %p\n", v9ses);
|
|
|
|
p9_client_disconnect(v9ses->clnt);
|
2005-09-10 03:04:23 +07:00
|
|
|
}
|
|
|
|
|
2010-03-30 06:13:59 +07:00
|
|
|
/**
|
|
|
|
* 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)
|
|
|
|
{
|
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR, "begin cancel session %p\n", v9ses);
|
|
|
|
p9_client_begin_disconnect(v9ses->clnt);
|
|
|
|
}
|
|
|
|
|
2005-09-10 03:04:20 +07:00
|
|
|
extern int v9fs_error_init(void);
|
|
|
|
|
2009-09-24 01:00:27 +07:00
|
|
|
static struct kobject *v9fs_kobj;
|
|
|
|
|
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
2005-09-10 03:04:20 +07:00
|
|
|
/**
|
2009-09-24 01:00:27 +07:00
|
|
|
* caches_show - list caches associated with a session
|
|
|
|
*
|
|
|
|
* Returns the size of buffer written.
|
|
|
|
*/
|
|
|
|
|
|
|
|
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,
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct attribute_group v9fs_attr_group = {
|
|
|
|
.attrs = v9fs_attrs,
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_sysfs_init - Initialize the v9fs sysfs interface
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int v9fs_sysfs_init(void)
|
|
|
|
{
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* init_v9fs - Initialize module
|
2005-09-10 03:04:20 +07:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int __init init_v9fs(void)
|
|
|
|
{
|
2009-09-24 01:00:27 +07:00
|
|
|
int err;
|
2007-01-26 15:57:04 +07:00
|
|
|
printk(KERN_INFO "Installing v9fs 9p2000 file system support\n");
|
2007-10-18 02:31:07 +07:00
|
|
|
/* TODO: Setup list of registered trasnport modules */
|
2009-09-24 01:00:27 +07:00
|
|
|
err = register_filesystem(&v9fs_fs_type);
|
|
|
|
if (err < 0) {
|
|
|
|
printk(KERN_ERR "Failed to register filesystem\n");
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = v9fs_cache_register();
|
|
|
|
if (err < 0) {
|
|
|
|
printk(KERN_ERR "Failed to register v9fs for caching\n");
|
|
|
|
goto out_fs_unreg;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = v9fs_sysfs_init();
|
|
|
|
if (err < 0) {
|
|
|
|
printk(KERN_ERR "Failed to register with sysfs\n");
|
|
|
|
goto out_sysfs_cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_sysfs_cleanup:
|
|
|
|
v9fs_sysfs_cleanup();
|
|
|
|
|
|
|
|
out_fs_unreg:
|
|
|
|
unregister_filesystem(&v9fs_fs_type);
|
|
|
|
|
|
|
|
return err;
|
2005-09-10 03:04:20 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-09-24 01:00:27 +07:00
|
|
|
* exit_v9fs - shutdown module
|
2005-09-10 03:04:20 +07:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void __exit exit_v9fs(void)
|
|
|
|
{
|
2009-09-24 01:00:27 +07:00
|
|
|
v9fs_sysfs_cleanup();
|
|
|
|
v9fs_cache_unregister();
|
2005-09-10 03:04:20 +07:00
|
|
|
unregister_filesystem(&v9fs_fs_type);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(init_v9fs)
|
|
|
|
module_exit(exit_v9fs)
|
|
|
|
|
2007-07-11 05:57:28 +07:00
|
|
|
MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
|
2005-09-10 03:04:20 +07:00
|
|
|
MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
|
|
|
|
MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>");
|
|
|
|
MODULE_LICENSE("GPL");
|