2005-09-09 20:04:19 +00:00
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/*
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* linux/fs/9p/vfs_inode.c
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*
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2005-09-09 20:04:26 +00:00
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* This file contains vfs inode ops for the 9P2000 protocol.
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2005-09-09 20:04:19 +00:00
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*
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* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
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* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
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*
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* This program is free software; you can redistribute it and/or modify
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2006-03-25 11:07:28 +00:00
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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2005-09-09 20:04:19 +00:00
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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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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#include <linux/file.h>
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#include <linux/pagemap.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/inet.h>
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#include <linux/namei.h>
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#include <linux/idr.h>
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Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.
This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
getting them indirectly
Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
they don't need sched.h
b) sched.h stops being dependency for significant number of files:
on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
after patch it's only 3744 (-8.3%).
Cross-compile tested on
all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
alpha alpha-up
arm
i386 i386-up i386-defconfig i386-allnoconfig
ia64 ia64-up
m68k
mips
parisc parisc-up
powerpc powerpc-up
s390 s390-up
sparc sparc-up
sparc64 sparc64-up
um-x86_64
x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig
as well as my two usual configs.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-20 21:22:52 +00:00
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#include <linux/sched.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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2010-05-31 07:52:56 +00:00
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#include <linux/xattr.h>
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2010-09-27 18:57:39 +00:00
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#include <linux/posix_acl.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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2005-09-09 20:04:19 +00:00
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#include "v9fs.h"
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#include "v9fs_vfs.h"
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#include "fid.h"
|
2009-09-23 18:00:27 +00:00
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#include "cache.h"
|
2010-05-31 07:52:56 +00:00
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#include "xattr.h"
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2010-09-27 18:57:39 +00:00
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#include "acl.h"
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2005-09-09 20:04:19 +00:00
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2007-02-12 08:55:38 +00:00
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static const struct inode_operations v9fs_dir_inode_operations;
|
2010-03-25 12:41:54 +00:00
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static const struct inode_operations v9fs_dir_inode_operations_dotu;
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static const struct inode_operations v9fs_dir_inode_operations_dotl;
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2007-02-12 08:55:38 +00:00
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static const struct inode_operations v9fs_file_inode_operations;
|
2010-03-25 12:41:54 +00:00
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static const struct inode_operations v9fs_file_inode_operations_dotl;
|
2007-02-12 08:55:38 +00:00
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static const struct inode_operations v9fs_symlink_inode_operations;
|
2010-03-25 12:41:54 +00:00
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static const struct inode_operations v9fs_symlink_inode_operations_dotl;
|
2005-09-09 20:04:19 +00:00
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/**
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* unixmode2p9mode - convert unix mode bits to plan 9
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* @v9ses: v9fs session information
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* @mode: mode to convert
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*
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*/
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2005-09-09 20:04:26 +00:00
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static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
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2005-09-09 20:04:19 +00:00
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{
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int res;
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res = mode & 0777;
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if (S_ISDIR(mode))
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2007-07-10 22:57:28 +00:00
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res |= P9_DMDIR;
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2010-03-05 18:48:00 +00:00
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if (v9fs_proto_dotu(v9ses)) {
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2005-09-09 20:04:19 +00:00
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if (S_ISLNK(mode))
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2007-07-10 22:57:28 +00:00
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res |= P9_DMSYMLINK;
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2005-09-09 20:04:19 +00:00
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if (v9ses->nodev == 0) {
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if (S_ISSOCK(mode))
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2007-07-10 22:57:28 +00:00
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res |= P9_DMSOCKET;
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2005-09-09 20:04:19 +00:00
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if (S_ISFIFO(mode))
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2007-07-10 22:57:28 +00:00
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res |= P9_DMNAMEDPIPE;
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2005-09-09 20:04:19 +00:00
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if (S_ISBLK(mode))
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2007-07-10 22:57:28 +00:00
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res |= P9_DMDEVICE;
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2005-09-09 20:04:19 +00:00
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if (S_ISCHR(mode))
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2007-07-10 22:57:28 +00:00
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res |= P9_DMDEVICE;
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2005-09-09 20:04:19 +00:00
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}
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if ((mode & S_ISUID) == S_ISUID)
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2007-07-10 22:57:28 +00:00
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res |= P9_DMSETUID;
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2005-09-09 20:04:19 +00:00
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if ((mode & S_ISGID) == S_ISGID)
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2007-07-10 22:57:28 +00:00
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res |= P9_DMSETGID;
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2008-02-07 01:25:06 +00:00
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if ((mode & S_ISVTX) == S_ISVTX)
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res |= P9_DMSETVTX;
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2007-07-10 22:57:28 +00:00
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if ((mode & P9_DMLINK))
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res |= P9_DMLINK;
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2005-09-09 20:04:19 +00:00
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}
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return res;
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}
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/**
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* p9mode2unixmode- convert plan9 mode bits to unix mode bits
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* @v9ses: v9fs session information
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* @mode: mode to convert
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*
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*/
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2005-09-09 20:04:26 +00:00
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static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
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2005-09-09 20:04:19 +00:00
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{
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int res;
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res = mode & 0777;
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2007-07-10 22:57:28 +00:00
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if ((mode & P9_DMDIR) == P9_DMDIR)
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2005-09-09 20:04:19 +00:00
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res |= S_IFDIR;
|
2010-03-05 18:48:00 +00:00
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else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
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2005-09-09 20:04:19 +00:00
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res |= S_IFLNK;
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2010-03-05 18:48:00 +00:00
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else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
|
2005-09-09 20:04:19 +00:00
|
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&& (v9ses->nodev == 0))
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res |= S_IFSOCK;
|
2010-03-05 18:48:00 +00:00
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else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
|
2005-09-09 20:04:19 +00:00
|
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&& (v9ses->nodev == 0))
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res |= S_IFIFO;
|
2010-03-05 18:48:00 +00:00
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else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
|
2005-09-09 20:04:19 +00:00
|
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&& (v9ses->nodev == 0))
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res |= S_IFBLK;
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else
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res |= S_IFREG;
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|
2010-03-05 18:48:00 +00:00
|
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if (v9fs_proto_dotu(v9ses)) {
|
2007-07-10 22:57:28 +00:00
|
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if ((mode & P9_DMSETUID) == P9_DMSETUID)
|
2005-09-09 20:04:19 +00:00
|
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res |= S_ISUID;
|
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|
2007-07-10 22:57:28 +00:00
|
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if ((mode & P9_DMSETGID) == P9_DMSETGID)
|
2005-09-09 20:04:19 +00:00
|
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res |= S_ISGID;
|
2008-02-07 01:25:06 +00:00
|
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if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
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res |= S_ISVTX;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
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return res;
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|
|
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}
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|
2008-03-05 13:08:09 +00:00
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/**
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* v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
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* @uflags: flags to convert
|
2008-06-24 22:39:39 +00:00
|
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* @extended: if .u extensions are active
|
2008-03-05 13:08:09 +00:00
|
|
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*/
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|
2008-06-24 22:39:39 +00:00
|
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int v9fs_uflags2omode(int uflags, int extended)
|
2006-03-02 10:54:30 +00:00
|
|
|
{
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|
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|
int ret;
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|
|
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ret = 0;
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|
|
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switch (uflags&3) {
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|
|
|
default:
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|
|
|
case O_RDONLY:
|
2007-07-10 22:57:28 +00:00
|
|
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ret = P9_OREAD;
|
2006-03-02 10:54:30 +00:00
|
|
|
break;
|
|
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|
|
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|
|
case O_WRONLY:
|
2007-07-10 22:57:28 +00:00
|
|
|
ret = P9_OWRITE;
|
2006-03-02 10:54:30 +00:00
|
|
|
break;
|
|
|
|
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|
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case O_RDWR:
|
2007-07-10 22:57:28 +00:00
|
|
|
ret = P9_ORDWR;
|
2006-03-02 10:54:30 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (uflags & O_TRUNC)
|
2007-07-10 22:57:28 +00:00
|
|
|
ret |= P9_OTRUNC;
|
2006-03-02 10:54:30 +00:00
|
|
|
|
2008-06-24 22:39:39 +00:00
|
|
|
if (extended) {
|
|
|
|
if (uflags & O_EXCL)
|
|
|
|
ret |= P9_OEXCL;
|
|
|
|
|
|
|
|
if (uflags & O_APPEND)
|
|
|
|
ret |= P9_OAPPEND;
|
|
|
|
}
|
2006-03-02 10:54:30 +00:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
/**
|
2006-01-08 09:05:00 +00:00
|
|
|
* v9fs_blank_wstat - helper function to setup a 9P stat structure
|
|
|
|
* @wstat: structure to initialize
|
2005-09-09 20:04:19 +00:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2010-02-08 21:36:48 +00:00
|
|
|
void
|
2007-07-10 22:57:28 +00:00
|
|
|
v9fs_blank_wstat(struct p9_wstat *wstat)
|
2005-09-09 20:04:19 +00:00
|
|
|
{
|
2006-01-08 09:05:00 +00:00
|
|
|
wstat->type = ~0;
|
|
|
|
wstat->dev = ~0;
|
|
|
|
wstat->qid.type = ~0;
|
|
|
|
wstat->qid.version = ~0;
|
|
|
|
*((long long *)&wstat->qid.path) = ~0;
|
|
|
|
wstat->mode = ~0;
|
|
|
|
wstat->atime = ~0;
|
|
|
|
wstat->mtime = ~0;
|
|
|
|
wstat->length = ~0;
|
|
|
|
wstat->name = NULL;
|
|
|
|
wstat->uid = NULL;
|
|
|
|
wstat->gid = NULL;
|
|
|
|
wstat->muid = NULL;
|
|
|
|
wstat->n_uid = ~0;
|
|
|
|
wstat->n_gid = ~0;
|
|
|
|
wstat->n_muid = ~0;
|
|
|
|
wstat->extension = NULL;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2009-09-23 18:00:27 +00:00
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
/**
|
|
|
|
* v9fs_alloc_inode - helper function to allocate an inode
|
|
|
|
* This callback is executed before setting up the inode so that we
|
|
|
|
* can associate a vcookie with each inode.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct inode *v9fs_alloc_inode(struct super_block *sb)
|
|
|
|
{
|
|
|
|
struct v9fs_cookie *vcookie;
|
|
|
|
vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache,
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (!vcookie)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
vcookie->fscache = NULL;
|
|
|
|
vcookie->qid = NULL;
|
|
|
|
spin_lock_init(&vcookie->lock);
|
|
|
|
return &vcookie->inode;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_destroy_inode - destroy an inode
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
void v9fs_destroy_inode(struct inode *inode)
|
|
|
|
{
|
|
|
|
kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode));
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2010-08-02 19:28:09 +00:00
|
|
|
/**
|
|
|
|
* v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
|
|
|
|
* new file system object. This checks the S_ISGID to determine the owning
|
|
|
|
* group of the new file system object.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
|
|
|
|
{
|
|
|
|
BUG_ON(dir_inode == NULL);
|
|
|
|
|
|
|
|
if (dir_inode->i_mode & S_ISGID) {
|
|
|
|
/* set_gid bit is set.*/
|
|
|
|
return dir_inode->i_gid;
|
|
|
|
}
|
|
|
|
return current_fsgid();
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_dentry_from_dir_inode - helper function to get the dentry from
|
|
|
|
* dir inode.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2010-07-27 19:49:43 +00:00
|
|
|
static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
|
2010-08-02 19:28:09 +00:00
|
|
|
{
|
|
|
|
struct dentry *dentry;
|
|
|
|
|
|
|
|
spin_lock(&dcache_lock);
|
|
|
|
/* Directory should have only one entry. */
|
|
|
|
BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry));
|
|
|
|
dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias);
|
|
|
|
spin_unlock(&dcache_lock);
|
|
|
|
return dentry;
|
|
|
|
}
|
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
/**
|
|
|
|
* v9fs_get_inode - helper function to setup an inode
|
|
|
|
* @sb: superblock
|
|
|
|
* @mode: mode to setup inode with
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct inode *v9fs_get_inode(struct super_block *sb, int mode)
|
|
|
|
{
|
2009-07-19 19:41:56 +00:00
|
|
|
int err;
|
2006-03-02 10:54:30 +00:00
|
|
|
struct inode *inode;
|
2005-09-09 20:04:27 +00:00
|
|
|
struct v9fs_session_info *v9ses = sb->s_fs_info;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
|
|
|
inode = new_inode(sb);
|
2009-07-19 19:41:56 +00:00
|
|
|
if (!inode) {
|
|
|
|
P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
|
2009-08-17 21:32:18 +00:00
|
|
|
return ERR_PTR(-ENOMEM);
|
2009-07-19 19:41:56 +00:00
|
|
|
}
|
|
|
|
|
2010-03-04 14:30:57 +00:00
|
|
|
inode_init_owner(inode, NULL, mode);
|
2009-07-19 19:41:56 +00:00
|
|
|
inode->i_blocks = 0;
|
|
|
|
inode->i_rdev = 0;
|
|
|
|
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
|
|
|
inode->i_mapping->a_ops = &v9fs_addr_operations;
|
|
|
|
|
|
|
|
switch (mode & S_IFMT) {
|
|
|
|
case S_IFIFO:
|
|
|
|
case S_IFBLK:
|
|
|
|
case S_IFCHR:
|
|
|
|
case S_IFSOCK:
|
2010-06-16 08:57:01 +00:00
|
|
|
if (v9fs_proto_dotl(v9ses)) {
|
|
|
|
inode->i_op = &v9fs_file_inode_operations_dotl;
|
|
|
|
inode->i_fop = &v9fs_file_operations_dotl;
|
|
|
|
} else if (v9fs_proto_dotu(v9ses)) {
|
|
|
|
inode->i_op = &v9fs_file_inode_operations;
|
|
|
|
inode->i_fop = &v9fs_file_operations;
|
|
|
|
} else {
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR,
|
2009-07-19 19:41:56 +00:00
|
|
|
"special files without extended mode\n");
|
|
|
|
err = -EINVAL;
|
|
|
|
goto error;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
2009-07-19 19:41:56 +00:00
|
|
|
init_special_inode(inode, inode->i_mode, inode->i_rdev);
|
|
|
|
break;
|
|
|
|
case S_IFREG:
|
2010-03-25 12:41:54 +00:00
|
|
|
if (v9fs_proto_dotl(v9ses)) {
|
|
|
|
inode->i_op = &v9fs_file_inode_operations_dotl;
|
|
|
|
inode->i_fop = &v9fs_file_operations_dotl;
|
|
|
|
} else {
|
|
|
|
inode->i_op = &v9fs_file_inode_operations;
|
|
|
|
inode->i_fop = &v9fs_file_operations;
|
|
|
|
}
|
|
|
|
|
2009-07-19 19:41:56 +00:00
|
|
|
break;
|
2010-03-25 12:41:54 +00:00
|
|
|
|
2009-07-19 19:41:56 +00:00
|
|
|
case S_IFLNK:
|
2010-03-25 12:41:54 +00:00
|
|
|
if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
|
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with "
|
|
|
|
"legacy protocol.\n");
|
2009-07-19 19:41:56 +00:00
|
|
|
err = -EINVAL;
|
|
|
|
goto error;
|
|
|
|
}
|
2010-03-25 12:41:54 +00:00
|
|
|
|
|
|
|
if (v9fs_proto_dotl(v9ses))
|
|
|
|
inode->i_op = &v9fs_symlink_inode_operations_dotl;
|
|
|
|
else
|
|
|
|
inode->i_op = &v9fs_symlink_inode_operations;
|
|
|
|
|
2009-07-19 19:41:56 +00:00
|
|
|
break;
|
|
|
|
case S_IFDIR:
|
|
|
|
inc_nlink(inode);
|
2010-03-25 12:41:54 +00:00
|
|
|
if (v9fs_proto_dotl(v9ses))
|
|
|
|
inode->i_op = &v9fs_dir_inode_operations_dotl;
|
|
|
|
else if (v9fs_proto_dotu(v9ses))
|
|
|
|
inode->i_op = &v9fs_dir_inode_operations_dotu;
|
2009-07-19 19:41:56 +00:00
|
|
|
else
|
|
|
|
inode->i_op = &v9fs_dir_inode_operations;
|
2010-03-25 12:41:54 +00:00
|
|
|
|
|
|
|
if (v9fs_proto_dotl(v9ses))
|
|
|
|
inode->i_fop = &v9fs_dir_operations_dotl;
|
|
|
|
else
|
|
|
|
inode->i_fop = &v9fs_dir_operations;
|
|
|
|
|
2009-07-19 19:41:56 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
|
|
|
|
mode, mode & S_IFMT);
|
|
|
|
err = -EINVAL;
|
|
|
|
goto error;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
2009-07-19 19:41:56 +00:00
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
return inode;
|
2009-07-19 19:41:56 +00:00
|
|
|
|
|
|
|
error:
|
|
|
|
iput(inode);
|
|
|
|
return ERR_PTR(err);
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
/*
|
2006-03-02 10:54:30 +00:00
|
|
|
static struct v9fs_fid*
|
|
|
|
v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
|
|
|
|
{
|
|
|
|
int err;
|
2006-12-07 04:36:29 +00:00
|
|
|
int nfid;
|
2006-03-02 10:54:30 +00:00
|
|
|
struct v9fs_fid *ret;
|
|
|
|
struct v9fs_fcall *fcall;
|
|
|
|
|
|
|
|
nfid = v9fs_get_idpool(&v9ses->fidpool);
|
|
|
|
if (nfid < 0) {
|
2005-09-28 04:45:24 +00:00
|
|
|
eprintk(KERN_WARNING, "no free fids available\n");
|
2006-03-08 05:55:42 +00:00
|
|
|
return ERR_PTR(-ENOSPC);
|
2005-09-28 04:45:24 +00:00
|
|
|
}
|
|
|
|
|
2006-03-02 10:54:30 +00:00
|
|
|
err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
|
|
|
|
&fcall);
|
|
|
|
|
|
|
|
if (err < 0) {
|
2006-05-15 16:44:21 +00:00
|
|
|
if (fcall && fcall->id == RWALK)
|
|
|
|
goto clunk_fid;
|
|
|
|
|
2006-03-02 10:54:30 +00:00
|
|
|
PRINT_FCALL_ERROR("walk error", fcall);
|
|
|
|
v9fs_put_idpool(nfid, &v9ses->fidpool);
|
|
|
|
goto error;
|
2005-09-28 04:45:24 +00:00
|
|
|
}
|
2006-03-02 10:54:30 +00:00
|
|
|
|
2006-01-08 09:04:58 +00:00
|
|
|
kfree(fcall);
|
|
|
|
fcall = NULL;
|
2006-03-02 10:54:30 +00:00
|
|
|
ret = v9fs_fid_create(v9ses, nfid);
|
|
|
|
if (!ret) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
goto clunk_fid;
|
|
|
|
}
|
2005-09-28 04:45:24 +00:00
|
|
|
|
2006-03-02 10:54:30 +00:00
|
|
|
err = v9fs_fid_insert(ret, dentry);
|
|
|
|
if (err < 0) {
|
|
|
|
v9fs_fid_destroy(ret);
|
|
|
|
goto clunk_fid;
|
2005-09-28 04:45:24 +00:00
|
|
|
}
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2006-03-02 10:54:30 +00:00
|
|
|
return ret;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2006-03-02 10:54:30 +00:00
|
|
|
clunk_fid:
|
|
|
|
v9fs_t_clunk(v9ses, nfid);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2006-03-02 10:54:30 +00:00
|
|
|
error:
|
|
|
|
kfree(fcall);
|
|
|
|
return ERR_PTR(err);
|
|
|
|
}
|
2007-07-10 22:57:28 +00:00
|
|
|
*/
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2009-09-23 18:00:27 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_clear_inode - release an inode
|
|
|
|
* @inode: inode to release
|
|
|
|
*
|
|
|
|
*/
|
2010-06-07 18:34:48 +00:00
|
|
|
void v9fs_evict_inode(struct inode *inode)
|
2009-09-23 18:00:27 +00:00
|
|
|
{
|
2010-06-07 18:34:48 +00:00
|
|
|
truncate_inode_pages(inode->i_mapping, 0);
|
|
|
|
end_writeback(inode);
|
2009-09-23 18:00:27 +00:00
|
|
|
filemap_fdatawrite(inode->i_mapping);
|
|
|
|
|
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
v9fs_cache_inode_put_cookie(inode);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2006-03-25 11:07:25 +00:00
|
|
|
static struct inode *
|
9p: getattr client implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for
9P2000.L. It introduces a new structure p9_stat_dotl for getting
Linux stat information along with QID. The data layout is similar to
stat structure in Linux user space with the following major
differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense
on the client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
2010-07-12 14:37:23 +00:00
|
|
|
v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid,
|
2006-03-02 10:54:30 +00:00
|
|
|
struct super_block *sb)
|
|
|
|
{
|
|
|
|
int err, umode;
|
9p: getattr client implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for
9P2000.L. It introduces a new structure p9_stat_dotl for getting
Linux stat information along with QID. The data layout is similar to
stat structure in Linux user space with the following major
differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense
on the client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
2010-07-12 14:37:23 +00:00
|
|
|
struct inode *ret = NULL;
|
2008-10-16 13:30:07 +00:00
|
|
|
struct p9_wstat *st;
|
2006-01-08 09:05:00 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
st = p9_client_stat(fid);
|
2009-07-19 19:41:54 +00:00
|
|
|
if (IS_ERR(st))
|
|
|
|
return ERR_CAST(st);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
umode = p9mode2unixmode(v9ses, st->mode);
|
2006-03-02 10:54:30 +00:00
|
|
|
ret = v9fs_get_inode(sb, umode);
|
|
|
|
if (IS_ERR(ret)) {
|
|
|
|
err = PTR_ERR(ret);
|
|
|
|
goto error;
|
|
|
|
}
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
v9fs_stat2inode(st, ret, sb);
|
|
|
|
ret->i_ino = v9fs_qid2ino(&st->qid);
|
2009-09-23 18:00:27 +00:00
|
|
|
|
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
v9fs_vcookie_set_qid(ret, &st->qid);
|
|
|
|
v9fs_cache_inode_get_cookie(ret);
|
|
|
|
#endif
|
2009-07-19 19:41:54 +00:00
|
|
|
p9stat_free(st);
|
2007-07-10 22:57:28 +00:00
|
|
|
kfree(st);
|
2006-03-02 10:54:30 +00:00
|
|
|
return ret;
|
|
|
|
error:
|
2009-07-19 19:41:54 +00:00
|
|
|
p9stat_free(st);
|
2007-07-10 22:57:28 +00:00
|
|
|
kfree(st);
|
2006-03-02 10:54:30 +00:00
|
|
|
return ERR_PTR(err);
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
9p: getattr client implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for
9P2000.L. It introduces a new structure p9_stat_dotl for getting
Linux stat information along with QID. The data layout is similar to
stat structure in Linux user space with the following major
differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense
on the client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
2010-07-12 14:37:23 +00:00
|
|
|
static struct inode *
|
|
|
|
v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
|
|
|
|
struct super_block *sb)
|
|
|
|
{
|
|
|
|
struct inode *ret = NULL;
|
|
|
|
int err;
|
|
|
|
struct p9_stat_dotl *st;
|
|
|
|
|
|
|
|
st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
|
|
|
|
if (IS_ERR(st))
|
|
|
|
return ERR_CAST(st);
|
|
|
|
|
|
|
|
ret = v9fs_get_inode(sb, st->st_mode);
|
|
|
|
if (IS_ERR(ret)) {
|
|
|
|
err = PTR_ERR(ret);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
v9fs_stat2inode_dotl(st, ret);
|
|
|
|
ret->i_ino = v9fs_qid2ino(&st->qid);
|
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
|
|
v9fs_vcookie_set_qid(ret, &st->qid);
|
|
|
|
v9fs_cache_inode_get_cookie(ret);
|
|
|
|
#endif
|
2010-09-27 18:57:39 +00:00
|
|
|
err = v9fs_get_acl(ret, fid);
|
|
|
|
if (err) {
|
|
|
|
iput(ret);
|
|
|
|
goto error;
|
|
|
|
}
|
9p: getattr client implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for
9P2000.L. It introduces a new structure p9_stat_dotl for getting
Linux stat information along with QID. The data layout is similar to
stat structure in Linux user space with the following major
differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense
on the client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
2010-07-12 14:37:23 +00:00
|
|
|
kfree(st);
|
|
|
|
return ret;
|
|
|
|
error:
|
|
|
|
kfree(st);
|
|
|
|
return ERR_PTR(err);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_inode_from_fid - Helper routine to populate an inode by
|
|
|
|
* issuing a attribute request
|
|
|
|
* @v9ses: session information
|
|
|
|
* @fid: fid to issue attribute request for
|
|
|
|
* @sb: superblock on which to create inode
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static inline struct inode *
|
|
|
|
v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
|
|
|
|
struct super_block *sb)
|
|
|
|
{
|
|
|
|
if (v9fs_proto_dotl(v9ses))
|
|
|
|
return v9fs_inode_dotl(v9ses, fid, sb);
|
|
|
|
else
|
|
|
|
return v9fs_inode(v9ses, fid, sb);
|
|
|
|
}
|
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
/**
|
|
|
|
* v9fs_remove - helper function to remove files and directories
|
2005-09-09 20:04:26 +00:00
|
|
|
* @dir: directory inode that is being deleted
|
|
|
|
* @file: dentry that is being deleted
|
|
|
|
* @rmdir: removing a directory
|
2005-09-09 20:04:19 +00:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
|
|
|
|
{
|
2010-03-29 23:14:50 +00:00
|
|
|
int retval;
|
2007-07-10 22:57:28 +00:00
|
|
|
struct inode *file_inode;
|
|
|
|
struct p9_fid *v9fid;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
|
2005-09-09 20:04:19 +00:00
|
|
|
rmdir);
|
|
|
|
|
|
|
|
file_inode = file->d_inode;
|
2007-04-23 21:41:11 +00:00
|
|
|
v9fid = v9fs_fid_clone(file);
|
2007-10-17 19:31:07 +00:00
|
|
|
if (IS_ERR(v9fid))
|
2007-01-26 08:57:06 +00:00
|
|
|
return PTR_ERR(v9fid);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2010-03-29 23:14:50 +00:00
|
|
|
retval = p9_client_remove(v9fid);
|
|
|
|
if (!retval)
|
|
|
|
drop_nlink(file_inode);
|
|
|
|
return retval;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2006-03-02 10:54:30 +00:00
|
|
|
static int
|
|
|
|
v9fs_open_created(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
/**
|
2007-07-10 22:57:28 +00:00
|
|
|
* v9fs_create - Create a file
|
2008-03-05 13:08:09 +00:00
|
|
|
* @v9ses: session information
|
|
|
|
* @dir: directory that dentry is being created in
|
2007-07-10 22:57:28 +00:00
|
|
|
* @dentry: dentry that is being created
|
2009-07-19 19:41:55 +00:00
|
|
|
* @extension: 9p2000.u extension string to support devices, etc.
|
2007-07-10 22:57:28 +00:00
|
|
|
* @perm: create permissions
|
|
|
|
* @mode: open mode
|
2005-09-09 20:04:19 +00:00
|
|
|
*
|
|
|
|
*/
|
2007-07-10 22:57:28 +00:00
|
|
|
static struct p9_fid *
|
|
|
|
v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
|
|
|
|
struct dentry *dentry, char *extension, u32 perm, u8 mode)
|
2005-09-09 20:04:19 +00:00
|
|
|
{
|
2006-03-02 10:54:30 +00:00
|
|
|
int err;
|
2007-07-10 22:57:28 +00:00
|
|
|
char *name;
|
|
|
|
struct p9_fid *dfid, *ofid, *fid;
|
2006-03-02 10:54:30 +00:00
|
|
|
struct inode *inode;
|
|
|
|
|
2008-10-16 13:30:07 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
err = 0;
|
|
|
|
ofid = NULL;
|
|
|
|
fid = NULL;
|
|
|
|
name = (char *) dentry->d_name.name;
|
2010-05-10 18:08:28 +00:00
|
|
|
dfid = v9fs_fid_lookup(dentry->d_parent);
|
2007-10-17 19:31:07 +00:00
|
|
|
if (IS_ERR(dfid)) {
|
2007-01-26 08:57:06 +00:00
|
|
|
err = PTR_ERR(dfid);
|
2010-05-10 18:08:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
|
|
return ERR_PTR(err);
|
2007-01-26 08:57:06 +00:00
|
|
|
}
|
2006-03-02 10:54:30 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
/* clone a fid to use for creation */
|
|
|
|
ofid = p9_client_walk(dfid, 0, NULL, 1);
|
|
|
|
if (IS_ERR(ofid)) {
|
|
|
|
err = PTR_ERR(ofid);
|
2008-10-16 13:30:07 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
|
2010-05-10 18:08:28 +00:00
|
|
|
return ERR_PTR(err);
|
2007-07-10 22:57:28 +00:00
|
|
|
}
|
2006-03-02 10:54:30 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
err = p9_client_fcreate(ofid, name, perm, mode, extension);
|
2008-10-16 13:30:07 +00:00
|
|
|
if (err < 0) {
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
|
2007-07-10 22:57:28 +00:00
|
|
|
goto error;
|
2008-10-16 13:30:07 +00:00
|
|
|
}
|
2006-03-02 10:54:30 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
/* now walk from the parent so we can get unopened fid */
|
2010-05-10 18:08:28 +00:00
|
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
2007-07-10 22:57:28 +00:00
|
|
|
if (IS_ERR(fid)) {
|
|
|
|
err = PTR_ERR(fid);
|
2008-10-16 13:30:07 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
|
2007-07-10 22:57:28 +00:00
|
|
|
fid = NULL;
|
2006-03-02 10:54:30 +00:00
|
|
|
goto error;
|
2010-05-10 18:08:28 +00:00
|
|
|
}
|
2006-03-02 10:54:30 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
/* instantiate inode and assign the unopened fid to the dentry */
|
|
|
|
inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
|
2006-03-02 10:54:30 +00:00
|
|
|
if (IS_ERR(inode)) {
|
|
|
|
err = PTR_ERR(inode);
|
2008-10-16 13:30:07 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
|
2006-03-02 10:54:30 +00:00
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
2007-10-17 19:31:07 +00:00
|
|
|
if (v9ses->cache)
|
2007-02-11 19:21:39 +00:00
|
|
|
dentry->d_op = &v9fs_cached_dentry_operations;
|
|
|
|
else
|
|
|
|
dentry->d_op = &v9fs_dentry_operations;
|
2007-07-10 22:57:28 +00:00
|
|
|
|
2006-03-02 10:54:30 +00:00
|
|
|
d_instantiate(dentry, inode);
|
2009-07-19 19:41:57 +00:00
|
|
|
err = v9fs_fid_add(dentry, fid);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
return ofid;
|
2006-03-02 10:54:30 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
error:
|
|
|
|
if (ofid)
|
|
|
|
p9_client_clunk(ofid);
|
|
|
|
|
|
|
|
if (fid)
|
|
|
|
p9_client_clunk(fid);
|
|
|
|
|
|
|
|
return ERR_PTR(err);
|
|
|
|
}
|
|
|
|
|
2010-06-18 01:27:46 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
|
|
|
|
* @dir: directory inode that is being created
|
|
|
|
* @dentry: dentry that is being deleted
|
|
|
|
* @mode: create permissions
|
|
|
|
* @nd: path information
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode,
|
|
|
|
struct nameidata *nd)
|
|
|
|
{
|
|
|
|
int err = 0;
|
|
|
|
char *name = NULL;
|
|
|
|
gid_t gid;
|
|
|
|
int flags;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *fid = NULL;
|
|
|
|
struct p9_fid *dfid, *ofid;
|
|
|
|
struct file *filp;
|
|
|
|
struct p9_qid qid;
|
|
|
|
struct inode *inode;
|
|
|
|
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
if (nd && nd->flags & LOOKUP_OPEN)
|
|
|
|
flags = nd->intent.open.flags - 1;
|
|
|
|
else
|
|
|
|
flags = O_RDWR;
|
|
|
|
|
|
|
|
name = (char *) dentry->d_name.name;
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
|
|
|
|
"mode:0x%x\n", name, flags, mode);
|
|
|
|
|
|
|
|
dfid = v9fs_fid_lookup(dentry->d_parent);
|
|
|
|
if (IS_ERR(dfid)) {
|
|
|
|
err = PTR_ERR(dfid);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* clone a fid to use for creation */
|
|
|
|
ofid = p9_client_walk(dfid, 0, NULL, 1);
|
|
|
|
if (IS_ERR(ofid)) {
|
|
|
|
err = PTR_ERR(ofid);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
gid = v9fs_get_fsgid_for_create(dir);
|
|
|
|
err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid);
|
|
|
|
if (err < 0) {
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS,
|
|
|
|
"p9_client_open_dotl failed in creat %d\n",
|
|
|
|
err);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* No need to populate the inode if we are not opening the file AND
|
|
|
|
* not in cached mode.
|
|
|
|
*/
|
|
|
|
if (!v9ses->cache && !(nd && nd->flags & LOOKUP_OPEN)) {
|
|
|
|
/* Not in cached mode. No need to populate inode with stat */
|
|
|
|
dentry->d_op = &v9fs_dentry_operations;
|
|
|
|
p9_client_clunk(ofid);
|
|
|
|
d_instantiate(dentry, NULL);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Now walk from the parent so we can get an unopened fid. */
|
|
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
|
|
if (IS_ERR(fid)) {
|
|
|
|
err = PTR_ERR(fid);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
|
|
|
|
fid = NULL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* instantiate inode and assign the unopened fid to dentry */
|
|
|
|
inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
|
|
if (IS_ERR(inode)) {
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
|
|
|
|
goto error;
|
|
|
|
}
|
2010-08-30 16:04:35 +00:00
|
|
|
if (v9ses->cache)
|
|
|
|
dentry->d_op = &v9fs_cached_dentry_operations;
|
|
|
|
else
|
|
|
|
dentry->d_op = &v9fs_dentry_operations;
|
2010-06-18 01:27:46 +00:00
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
err = v9fs_fid_add(dentry, fid);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
/* if we are opening a file, assign the open fid to the file */
|
|
|
|
if (nd && nd->flags & LOOKUP_OPEN) {
|
|
|
|
filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
|
|
|
|
if (IS_ERR(filp)) {
|
|
|
|
p9_client_clunk(ofid);
|
|
|
|
return PTR_ERR(filp);
|
|
|
|
}
|
|
|
|
filp->private_data = ofid;
|
|
|
|
} else
|
|
|
|
p9_client_clunk(ofid);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error:
|
|
|
|
if (ofid)
|
|
|
|
p9_client_clunk(ofid);
|
|
|
|
if (fid)
|
|
|
|
p9_client_clunk(fid);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_create - VFS hook to create files
|
2008-03-05 13:08:09 +00:00
|
|
|
* @dir: directory inode that is being created
|
2007-07-10 22:57:28 +00:00
|
|
|
* @dentry: dentry that is being deleted
|
|
|
|
* @mode: create permissions
|
|
|
|
* @nd: path information
|
|
|
|
*
|
|
|
|
*/
|
2006-03-02 10:54:30 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
static int
|
|
|
|
v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
|
|
|
|
struct nameidata *nd)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
u32 perm;
|
|
|
|
int flags;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *fid;
|
|
|
|
struct file *filp;
|
|
|
|
|
|
|
|
err = 0;
|
|
|
|
fid = NULL;
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
perm = unixmode2p9mode(v9ses, mode);
|
|
|
|
if (nd && nd->flags & LOOKUP_OPEN)
|
|
|
|
flags = nd->intent.open.flags - 1;
|
|
|
|
else
|
|
|
|
flags = O_RDWR;
|
|
|
|
|
|
|
|
fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
|
2010-03-05 18:48:00 +00:00
|
|
|
v9fs_uflags2omode(flags,
|
|
|
|
v9fs_proto_dotu(v9ses)));
|
2007-07-10 22:57:28 +00:00
|
|
|
if (IS_ERR(fid)) {
|
|
|
|
err = PTR_ERR(fid);
|
|
|
|
fid = NULL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* if we are opening a file, assign the open fid to the file */
|
|
|
|
if (nd && nd->flags & LOOKUP_OPEN) {
|
2006-03-02 10:54:30 +00:00
|
|
|
filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
|
|
|
|
if (IS_ERR(filp)) {
|
2007-07-10 22:57:28 +00:00
|
|
|
err = PTR_ERR(filp);
|
|
|
|
goto error;
|
2006-03-02 10:54:30 +00:00
|
|
|
}
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
filp->private_data = fid;
|
|
|
|
} else
|
|
|
|
p9_client_clunk(fid);
|
2006-03-02 10:54:30 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error:
|
2007-07-10 22:57:28 +00:00
|
|
|
if (fid)
|
|
|
|
p9_client_clunk(fid);
|
2006-03-02 10:54:30 +00:00
|
|
|
|
|
|
|
return err;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_vfs_mkdir - VFS mkdir hook to create a directory
|
2008-03-05 13:08:09 +00:00
|
|
|
* @dir: inode that is being unlinked
|
2005-09-09 20:04:19 +00:00
|
|
|
* @dentry: dentry that is being unlinked
|
|
|
|
* @mode: mode for new directory
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2006-03-02 10:54:30 +00:00
|
|
|
static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
|
2005-09-09 20:04:19 +00:00
|
|
|
{
|
2006-03-02 10:54:30 +00:00
|
|
|
int err;
|
2007-07-10 22:57:28 +00:00
|
|
|
u32 perm;
|
2006-03-02 10:54:30 +00:00
|
|
|
struct v9fs_session_info *v9ses;
|
2007-07-10 22:57:28 +00:00
|
|
|
struct p9_fid *fid;
|
2006-03-02 10:54:30 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
|
|
|
|
err = 0;
|
2006-03-02 10:54:30 +00:00
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
|
2007-07-10 22:57:28 +00:00
|
|
|
fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
|
|
|
|
if (IS_ERR(fid)) {
|
|
|
|
err = PTR_ERR(fid);
|
|
|
|
fid = NULL;
|
2006-03-02 10:54:30 +00:00
|
|
|
}
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
if (fid)
|
|
|
|
p9_client_clunk(fid);
|
2006-03-02 10:54:30 +00:00
|
|
|
|
|
|
|
return err;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2010-06-16 08:57:22 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
|
|
|
|
* @dir: inode that is being unlinked
|
|
|
|
* @dentry: dentry that is being unlinked
|
|
|
|
* @mode: mode for new directory
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry,
|
|
|
|
int mode)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *fid = NULL, *dfid = NULL;
|
|
|
|
gid_t gid;
|
|
|
|
char *name;
|
|
|
|
struct inode *inode;
|
|
|
|
struct p9_qid qid;
|
|
|
|
struct dentry *dir_dentry;
|
|
|
|
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
|
|
|
|
err = 0;
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
|
|
|
|
mode |= S_IFDIR;
|
2010-08-18 06:01:52 +00:00
|
|
|
if (dir->i_mode & S_ISGID)
|
|
|
|
mode |= S_ISGID;
|
2010-06-16 08:57:22 +00:00
|
|
|
dir_dentry = v9fs_dentry_from_dir_inode(dir);
|
|
|
|
dfid = v9fs_fid_lookup(dir_dentry);
|
|
|
|
if (IS_ERR(dfid)) {
|
|
|
|
err = PTR_ERR(dfid);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
|
|
dfid = NULL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
gid = v9fs_get_fsgid_for_create(dir);
|
|
|
|
|
|
|
|
name = (char *) dentry->d_name.name;
|
|
|
|
err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
/* instantiate inode and assign the unopened fid to the dentry */
|
|
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
|
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
|
|
if (IS_ERR(fid)) {
|
|
|
|
err = PTR_ERR(fid);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
|
|
|
|
err);
|
|
|
|
fid = NULL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
|
|
if (IS_ERR(inode)) {
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
|
|
|
|
err);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
dentry->d_op = &v9fs_cached_dentry_operations;
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
err = v9fs_fid_add(dentry, fid);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
fid = NULL;
|
|
|
|
}
|
|
|
|
error:
|
|
|
|
if (fid)
|
|
|
|
p9_client_clunk(fid);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
|
|
|
|
* @dir: inode that is being walked from
|
|
|
|
* @dentry: dentry that is being walked to?
|
|
|
|
* @nameidata: path data
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
|
|
|
|
struct nameidata *nameidata)
|
|
|
|
{
|
|
|
|
struct super_block *sb;
|
|
|
|
struct v9fs_session_info *v9ses;
|
2007-07-10 22:57:28 +00:00
|
|
|
struct p9_fid *dfid, *fid;
|
2005-09-09 20:04:19 +00:00
|
|
|
struct inode *inode;
|
2007-07-10 22:57:28 +00:00
|
|
|
char *name;
|
2005-09-09 20:04:19 +00:00
|
|
|
int result = 0;
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
|
2006-03-08 05:55:42 +00:00
|
|
|
dir, dentry->d_name.name, dentry, nameidata);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2010-03-29 23:13:59 +00:00
|
|
|
if (dentry->d_name.len > NAME_MAX)
|
|
|
|
return ERR_PTR(-ENAMETOOLONG);
|
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
sb = dir->i_sb;
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
2010-06-30 13:48:50 +00:00
|
|
|
/* We can walk d_parent because we hold the dir->i_mutex */
|
2007-07-10 22:57:28 +00:00
|
|
|
dfid = v9fs_fid_lookup(dentry->d_parent);
|
|
|
|
if (IS_ERR(dfid))
|
2008-02-07 08:15:26 +00:00
|
|
|
return ERR_CAST(dfid);
|
2007-07-10 22:57:28 +00:00
|
|
|
|
|
|
|
name = (char *) dentry->d_name.name;
|
|
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
|
|
if (IS_ERR(fid)) {
|
|
|
|
result = PTR_ERR(fid);
|
2005-09-09 20:04:19 +00:00
|
|
|
if (result == -ENOENT) {
|
2010-05-14 13:04:39 +00:00
|
|
|
inode = NULL;
|
|
|
|
goto inst_out;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
return ERR_PTR(result);
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
|
|
if (IS_ERR(inode)) {
|
|
|
|
result = PTR_ERR(inode);
|
|
|
|
inode = NULL;
|
|
|
|
goto error;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
result = v9fs_fid_add(dentry, fid);
|
2006-03-02 10:54:30 +00:00
|
|
|
if (result < 0)
|
2007-07-10 22:57:28 +00:00
|
|
|
goto error;
|
2006-03-02 10:54:30 +00:00
|
|
|
|
2010-05-14 13:04:39 +00:00
|
|
|
inst_out:
|
|
|
|
if (v9ses->cache)
|
2007-02-11 19:21:39 +00:00
|
|
|
dentry->d_op = &v9fs_cached_dentry_operations;
|
|
|
|
else
|
|
|
|
dentry->d_op = &v9fs_dentry_operations;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
|
|
|
d_add(dentry, inode);
|
|
|
|
return NULL;
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
error:
|
2008-09-24 21:22:22 +00:00
|
|
|
p9_client_clunk(fid);
|
2007-01-26 08:57:06 +00:00
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
return ERR_PTR(result);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_vfs_unlink - VFS unlink hook to delete an inode
|
|
|
|
* @i: inode that is being unlinked
|
2005-09-09 20:04:26 +00:00
|
|
|
* @d: dentry that is being unlinked
|
2005-09-09 20:04:19 +00:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
|
|
|
|
{
|
|
|
|
return v9fs_remove(i, d, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_vfs_rmdir - VFS unlink hook to delete a directory
|
|
|
|
* @i: inode that is being unlinked
|
2005-09-09 20:04:26 +00:00
|
|
|
* @d: dentry that is being unlinked
|
2005-09-09 20:04:19 +00:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
|
|
|
|
{
|
|
|
|
return v9fs_remove(i, d, 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_vfs_rename - VFS hook to rename an inode
|
|
|
|
* @old_dir: old dir inode
|
|
|
|
* @old_dentry: old dentry
|
|
|
|
* @new_dir: new dir inode
|
|
|
|
* @new_dentry: new dentry
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
|
|
|
|
struct inode *new_dir, struct dentry *new_dentry)
|
|
|
|
{
|
2007-07-10 22:57:28 +00:00
|
|
|
struct inode *old_inode;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *oldfid;
|
|
|
|
struct p9_fid *olddirfid;
|
|
|
|
struct p9_fid *newdirfid;
|
|
|
|
struct p9_wstat wstat;
|
|
|
|
int retval;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "\n");
|
|
|
|
retval = 0;
|
|
|
|
old_inode = old_dentry->d_inode;
|
|
|
|
v9ses = v9fs_inode2v9ses(old_inode);
|
|
|
|
oldfid = v9fs_fid_lookup(old_dentry);
|
2007-10-17 19:31:07 +00:00
|
|
|
if (IS_ERR(oldfid))
|
2007-01-26 08:57:06 +00:00
|
|
|
return PTR_ERR(oldfid);
|
|
|
|
|
|
|
|
olddirfid = v9fs_fid_clone(old_dentry->d_parent);
|
2007-10-17 19:31:07 +00:00
|
|
|
if (IS_ERR(olddirfid)) {
|
2007-01-26 08:57:06 +00:00
|
|
|
retval = PTR_ERR(olddirfid);
|
2007-07-10 22:57:28 +00:00
|
|
|
goto done;
|
2007-01-26 08:57:06 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
newdirfid = v9fs_fid_clone(new_dentry->d_parent);
|
2007-10-17 19:31:07 +00:00
|
|
|
if (IS_ERR(newdirfid)) {
|
2007-01-26 08:57:06 +00:00
|
|
|
retval = PTR_ERR(newdirfid);
|
2007-07-10 22:57:28 +00:00
|
|
|
goto clunk_olddir;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2010-06-30 13:48:50 +00:00
|
|
|
down_write(&v9ses->rename_sem);
|
2010-03-25 12:47:26 +00:00
|
|
|
if (v9fs_proto_dotl(v9ses)) {
|
|
|
|
retval = p9_client_rename(oldfid, newdirfid,
|
|
|
|
(char *) new_dentry->d_name.name);
|
|
|
|
if (retval != -ENOSYS)
|
|
|
|
goto clunk_newdir;
|
|
|
|
}
|
2010-06-30 13:48:50 +00:00
|
|
|
if (old_dentry->d_parent != new_dentry->d_parent) {
|
|
|
|
/*
|
|
|
|
* 9P .u can only handle file rename in the same directory
|
|
|
|
*/
|
2010-03-25 12:47:26 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR,
|
|
|
|
"old dir and new dir are different\n");
|
2007-01-26 08:57:04 +00:00
|
|
|
retval = -EXDEV;
|
2007-07-10 22:57:28 +00:00
|
|
|
goto clunk_newdir;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
2006-01-08 09:05:00 +00:00
|
|
|
v9fs_blank_wstat(&wstat);
|
2007-10-17 19:31:07 +00:00
|
|
|
wstat.muid = v9ses->uname;
|
2006-01-08 09:05:00 +00:00
|
|
|
wstat.name = (char *) new_dentry->d_name.name;
|
2007-07-10 22:57:28 +00:00
|
|
|
retval = p9_client_wstat(oldfid, &wstat);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
clunk_newdir:
|
2010-06-30 13:48:50 +00:00
|
|
|
if (!retval)
|
|
|
|
/* successful rename */
|
|
|
|
d_move(old_dentry, new_dentry);
|
|
|
|
up_write(&v9ses->rename_sem);
|
2007-10-23 18:48:33 +00:00
|
|
|
p9_client_clunk(newdirfid);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
clunk_olddir:
|
2007-10-23 18:48:33 +00:00
|
|
|
p9_client_clunk(olddirfid);
|
2007-01-26 08:57:06 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
done:
|
2005-09-09 20:04:19 +00:00
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2006-01-09 23:10:13 +00:00
|
|
|
* v9fs_vfs_getattr - retrieve file metadata
|
2008-03-05 13:08:09 +00:00
|
|
|
* @mnt: mount information
|
|
|
|
* @dentry: file to get attributes on
|
|
|
|
* @stat: metadata structure to populate
|
2005-09-09 20:04:19 +00:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
|
|
|
|
struct kstat *stat)
|
|
|
|
{
|
2007-07-10 22:57:28 +00:00
|
|
|
int err;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *fid;
|
2008-10-16 13:30:07 +00:00
|
|
|
struct p9_wstat *st;
|
2007-07-10 22:57:28 +00:00
|
|
|
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
|
|
|
|
err = -EPERM;
|
|
|
|
v9ses = v9fs_inode2v9ses(dentry->d_inode);
|
2009-09-23 18:00:27 +00:00
|
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
|
2007-07-13 18:01:27 +00:00
|
|
|
return simple_getattr(mnt, dentry, stat);
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
fid = v9fs_fid_lookup(dentry);
|
|
|
|
if (IS_ERR(fid))
|
2007-01-26 08:57:06 +00:00
|
|
|
return PTR_ERR(fid);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
st = p9_client_stat(fid);
|
|
|
|
if (IS_ERR(st))
|
|
|
|
return PTR_ERR(st);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
|
2005-09-09 20:04:19 +00:00
|
|
|
generic_fillattr(dentry->d_inode, stat);
|
|
|
|
|
2010-08-24 18:13:59 +00:00
|
|
|
p9stat_free(st);
|
2007-07-10 22:57:28 +00:00
|
|
|
kfree(st);
|
|
|
|
return 0;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
9p: getattr client implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for
9P2000.L. It introduces a new structure p9_stat_dotl for getting
Linux stat information along with QID. The data layout is similar to
stat structure in Linux user space with the following major
differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense
on the client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
2010-07-12 14:37:23 +00:00
|
|
|
static int
|
|
|
|
v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
|
|
|
|
struct kstat *stat)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *fid;
|
|
|
|
struct p9_stat_dotl *st;
|
|
|
|
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
|
|
|
|
err = -EPERM;
|
|
|
|
v9ses = v9fs_inode2v9ses(dentry->d_inode);
|
|
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
|
|
|
|
return simple_getattr(mnt, dentry, stat);
|
|
|
|
|
|
|
|
fid = v9fs_fid_lookup(dentry);
|
|
|
|
if (IS_ERR(fid))
|
|
|
|
return PTR_ERR(fid);
|
|
|
|
|
|
|
|
/* Ask for all the fields in stat structure. Server will return
|
|
|
|
* whatever it supports
|
|
|
|
*/
|
|
|
|
|
|
|
|
st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
|
|
|
|
if (IS_ERR(st))
|
|
|
|
return PTR_ERR(st);
|
|
|
|
|
|
|
|
v9fs_stat2inode_dotl(st, dentry->d_inode);
|
|
|
|
generic_fillattr(dentry->d_inode, stat);
|
|
|
|
/* Change block size to what the server returned */
|
|
|
|
stat->blksize = st->st_blksize;
|
|
|
|
|
|
|
|
kfree(st);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_setattr - set file metadata
|
|
|
|
* @dentry: file whose metadata to set
|
|
|
|
* @iattr: metadata assignment structure
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
|
|
|
|
{
|
2007-07-10 22:57:28 +00:00
|
|
|
int retval;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *fid;
|
|
|
|
struct p9_wstat wstat;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "\n");
|
|
|
|
retval = -EPERM;
|
|
|
|
v9ses = v9fs_inode2v9ses(dentry->d_inode);
|
|
|
|
fid = v9fs_fid_lookup(dentry);
|
2007-01-26 08:57:06 +00:00
|
|
|
if(IS_ERR(fid))
|
|
|
|
return PTR_ERR(fid);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2006-01-08 09:05:00 +00:00
|
|
|
v9fs_blank_wstat(&wstat);
|
2005-09-09 20:04:19 +00:00
|
|
|
if (iattr->ia_valid & ATTR_MODE)
|
2006-01-08 09:05:00 +00:00
|
|
|
wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
|
|
|
if (iattr->ia_valid & ATTR_MTIME)
|
2006-01-08 09:05:00 +00:00
|
|
|
wstat.mtime = iattr->ia_mtime.tv_sec;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
|
|
|
if (iattr->ia_valid & ATTR_ATIME)
|
2006-01-08 09:05:00 +00:00
|
|
|
wstat.atime = iattr->ia_atime.tv_sec;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
|
|
|
if (iattr->ia_valid & ATTR_SIZE)
|
2006-01-08 09:05:00 +00:00
|
|
|
wstat.length = iattr->ia_size;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2010-03-05 18:48:00 +00:00
|
|
|
if (v9fs_proto_dotu(v9ses)) {
|
2006-01-08 09:05:00 +00:00
|
|
|
if (iattr->ia_valid & ATTR_UID)
|
|
|
|
wstat.n_uid = iattr->ia_uid;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2006-01-08 09:05:00 +00:00
|
|
|
if (iattr->ia_valid & ATTR_GID)
|
|
|
|
wstat.n_gid = iattr->ia_gid;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
retval = p9_client_wstat(fid, &wstat);
|
2010-06-04 09:30:02 +00:00
|
|
|
if (retval < 0)
|
|
|
|
return retval;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2010-06-04 09:30:02 +00:00
|
|
|
if ((iattr->ia_valid & ATTR_SIZE) &&
|
|
|
|
iattr->ia_size != i_size_read(dentry->d_inode)) {
|
|
|
|
retval = vmtruncate(dentry->d_inode, iattr->ia_size);
|
|
|
|
if (retval)
|
|
|
|
return retval;
|
|
|
|
}
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2010-06-04 09:30:02 +00:00
|
|
|
setattr_copy(dentry->d_inode, iattr);
|
|
|
|
mark_inode_dirty(dentry->d_inode);
|
|
|
|
return 0;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
9p: Implement client side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to
p9_iattr_dotl structure and passes it down to the client. The
only check it has is calling inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file
parameters because I don't think these are needed in our case.
The client user space can request updating just ctime by calling
chown(fd, -1, -1). This is handled on server side without a need
for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and
size of the file.
*) 9P RFC says "Either all the changes in wstat request happen, or
none of them does: if the request succeeds, all changes were made;
if it fails, none were."
I have not done anything to implement this specifically because I
don't see a reason.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2010-06-18 06:20:10 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_setattr_dotl - set file metadata
|
|
|
|
* @dentry: file whose metadata to set
|
|
|
|
* @iattr: metadata assignment structure
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2010-09-27 18:57:40 +00:00
|
|
|
int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
|
9p: Implement client side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to
p9_iattr_dotl structure and passes it down to the client. The
only check it has is calling inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file
parameters because I don't think these are needed in our case.
The client user space can request updating just ctime by calling
chown(fd, -1, -1). This is handled on server side without a need
for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and
size of the file.
*) 9P RFC says "Either all the changes in wstat request happen, or
none of them does: if the request succeeds, all changes were made;
if it fails, none were."
I have not done anything to implement this specifically because I
don't see a reason.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2010-06-18 06:20:10 +00:00
|
|
|
{
|
|
|
|
int retval;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *fid;
|
|
|
|
struct p9_iattr_dotl p9attr;
|
|
|
|
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "\n");
|
|
|
|
|
|
|
|
retval = inode_change_ok(dentry->d_inode, iattr);
|
|
|
|
if (retval)
|
|
|
|
return retval;
|
|
|
|
|
|
|
|
p9attr.valid = iattr->ia_valid;
|
|
|
|
p9attr.mode = iattr->ia_mode;
|
|
|
|
p9attr.uid = iattr->ia_uid;
|
|
|
|
p9attr.gid = iattr->ia_gid;
|
|
|
|
p9attr.size = iattr->ia_size;
|
|
|
|
p9attr.atime_sec = iattr->ia_atime.tv_sec;
|
|
|
|
p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
|
|
|
|
p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
|
|
|
|
p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
|
|
|
|
|
|
|
|
retval = -EPERM;
|
|
|
|
v9ses = v9fs_inode2v9ses(dentry->d_inode);
|
|
|
|
fid = v9fs_fid_lookup(dentry);
|
|
|
|
if (IS_ERR(fid))
|
|
|
|
return PTR_ERR(fid);
|
|
|
|
|
|
|
|
retval = p9_client_setattr(fid, &p9attr);
|
2010-06-22 01:15:01 +00:00
|
|
|
if (retval < 0)
|
|
|
|
return retval;
|
9p: Implement client side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to
p9_iattr_dotl structure and passes it down to the client. The
only check it has is calling inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file
parameters because I don't think these are needed in our case.
The client user space can request updating just ctime by calling
chown(fd, -1, -1). This is handled on server side without a need
for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and
size of the file.
*) 9P RFC says "Either all the changes in wstat request happen, or
none of them does: if the request succeeds, all changes were made;
if it fails, none were."
I have not done anything to implement this specifically because I
don't see a reason.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2010-06-18 06:20:10 +00:00
|
|
|
|
2010-06-22 01:15:01 +00:00
|
|
|
if ((iattr->ia_valid & ATTR_SIZE) &&
|
|
|
|
iattr->ia_size != i_size_read(dentry->d_inode)) {
|
|
|
|
retval = vmtruncate(dentry->d_inode, iattr->ia_size);
|
|
|
|
if (retval)
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
setattr_copy(dentry->d_inode, iattr);
|
|
|
|
mark_inode_dirty(dentry->d_inode);
|
2010-09-27 18:57:40 +00:00
|
|
|
if (iattr->ia_valid & ATTR_MODE) {
|
|
|
|
/* We also want to update ACL when we update mode bits */
|
|
|
|
retval = v9fs_acl_chmod(dentry);
|
|
|
|
if (retval < 0)
|
|
|
|
return retval;
|
|
|
|
}
|
2010-06-22 01:15:01 +00:00
|
|
|
return 0;
|
9p: Implement client side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to
p9_iattr_dotl structure and passes it down to the client. The
only check it has is calling inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file
parameters because I don't think these are needed in our case.
The client user space can request updating just ctime by calling
chown(fd, -1, -1). This is handled on server side without a need
for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and
size of the file.
*) 9P RFC says "Either all the changes in wstat request happen, or
none of them does: if the request succeeds, all changes were made;
if it fails, none were."
I have not done anything to implement this specifically because I
don't see a reason.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2010-06-18 06:20:10 +00:00
|
|
|
}
|
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
/**
|
2006-01-08 09:05:00 +00:00
|
|
|
* v9fs_stat2inode - populate an inode structure with mistat info
|
|
|
|
* @stat: Plan 9 metadata (mistat) structure
|
2005-09-09 20:04:19 +00:00
|
|
|
* @inode: inode to populate
|
|
|
|
* @sb: superblock of filesystem
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
void
|
2008-10-16 13:30:07 +00:00
|
|
|
v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
|
2006-01-08 09:05:00 +00:00
|
|
|
struct super_block *sb)
|
2005-09-09 20:04:19 +00:00
|
|
|
{
|
2006-01-08 09:05:00 +00:00
|
|
|
char ext[32];
|
2010-03-05 20:43:43 +00:00
|
|
|
char tag_name[14];
|
|
|
|
unsigned int i_nlink;
|
2005-09-09 20:04:19 +00:00
|
|
|
struct v9fs_session_info *v9ses = sb->s_fs_info;
|
|
|
|
|
|
|
|
inode->i_nlink = 1;
|
|
|
|
|
2006-01-08 09:05:00 +00:00
|
|
|
inode->i_atime.tv_sec = stat->atime;
|
|
|
|
inode->i_mtime.tv_sec = stat->mtime;
|
|
|
|
inode->i_ctime.tv_sec = stat->mtime;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-10-17 19:31:07 +00:00
|
|
|
inode->i_uid = v9ses->dfltuid;
|
|
|
|
inode->i_gid = v9ses->dfltgid;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2010-03-05 18:48:00 +00:00
|
|
|
if (v9fs_proto_dotu(v9ses)) {
|
2006-01-08 09:05:00 +00:00
|
|
|
inode->i_uid = stat->n_uid;
|
|
|
|
inode->i_gid = stat->n_gid;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
2010-03-05 20:43:43 +00:00
|
|
|
if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
|
|
|
|
if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
|
|
|
|
/*
|
|
|
|
* Hadlink support got added later to
|
|
|
|
* to the .u extension. So there can be
|
|
|
|
* server out there that doesn't support
|
|
|
|
* this even with .u extension. So check
|
|
|
|
* for non NULL stat->extension
|
|
|
|
*/
|
|
|
|
strncpy(ext, stat->extension, sizeof(ext));
|
|
|
|
/* HARDLINKCOUNT %u */
|
|
|
|
sscanf(ext, "%13s %u", tag_name, &i_nlink);
|
|
|
|
if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
|
|
|
|
inode->i_nlink = i_nlink;
|
|
|
|
}
|
|
|
|
}
|
2006-01-08 09:05:00 +00:00
|
|
|
inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
|
2005-09-09 20:04:19 +00:00
|
|
|
if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
|
|
|
|
char type = 0;
|
|
|
|
int major = -1;
|
|
|
|
int minor = -1;
|
2006-01-08 09:05:00 +00:00
|
|
|
|
2008-10-16 13:30:07 +00:00
|
|
|
strncpy(ext, stat->extension, sizeof(ext));
|
2006-01-08 09:05:00 +00:00
|
|
|
sscanf(ext, "%c %u %u", &type, &major, &minor);
|
2005-09-09 20:04:19 +00:00
|
|
|
switch (type) {
|
|
|
|
case 'c':
|
|
|
|
inode->i_mode &= ~S_IFBLK;
|
|
|
|
inode->i_mode |= S_IFCHR;
|
|
|
|
break;
|
|
|
|
case 'b':
|
|
|
|
break;
|
|
|
|
default:
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR,
|
2008-10-16 13:30:07 +00:00
|
|
|
"Unknown special type %c %s\n", type,
|
|
|
|
stat->extension);
|
2005-09-09 20:04:19 +00:00
|
|
|
};
|
|
|
|
inode->i_rdev = MKDEV(major, minor);
|
9p: fix device file handling
In v9fs_get_inode(), for block, as well as char devices (in theory),
the function init_special_inode() is called to set up callback functions
for file ops. this function uses the file mode's value to determine whether
to use block or char dev functions. In v9fs_inode_from_fid(), the function
p9mode2unixmode() is used, but for all devices it initially returns S_IFBLK,
then uses v9fs_get_inode() to initialise a new inode, then finally uses
v9fs_stat2inode(), which would determine whether the inode is a block or
character device. However, at that point init_special_inode() had already
decided to use the block device functions, so even if the inode's mode is
turned to a character device, the block functions are still used to operate
on them. The attached patch simply calls init_special_inode() again for devices
after parsing device node data in v9fs_stat2inode() so that the proper functions
are used.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2008-10-17 17:44:46 +00:00
|
|
|
init_special_inode(inode, inode->i_mode, inode->i_rdev);
|
2005-09-09 20:04:19 +00:00
|
|
|
} else
|
|
|
|
inode->i_rdev = 0;
|
|
|
|
|
2009-09-22 16:34:05 +00:00
|
|
|
i_size_write(inode, stat->length);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
/* not real number of blocks, but 512 byte ones ... */
|
2009-09-22 16:34:05 +00:00
|
|
|
inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
9p: getattr client implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for
9P2000.L. It introduces a new structure p9_stat_dotl for getting
Linux stat information along with QID. The data layout is similar to
stat structure in Linux user space with the following major
differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense
on the client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
2010-07-12 14:37:23 +00:00
|
|
|
/**
|
|
|
|
* v9fs_stat2inode_dotl - populate an inode structure with stat info
|
|
|
|
* @stat: stat structure
|
|
|
|
* @inode: inode to populate
|
|
|
|
* @sb: superblock of filesystem
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
void
|
|
|
|
v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
|
|
|
|
{
|
|
|
|
|
|
|
|
if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
|
|
|
|
inode->i_atime.tv_sec = stat->st_atime_sec;
|
|
|
|
inode->i_atime.tv_nsec = stat->st_atime_nsec;
|
|
|
|
inode->i_mtime.tv_sec = stat->st_mtime_sec;
|
|
|
|
inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
|
|
|
|
inode->i_ctime.tv_sec = stat->st_ctime_sec;
|
|
|
|
inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
|
|
|
|
inode->i_uid = stat->st_uid;
|
|
|
|
inode->i_gid = stat->st_gid;
|
|
|
|
inode->i_nlink = stat->st_nlink;
|
|
|
|
inode->i_mode = stat->st_mode;
|
|
|
|
inode->i_rdev = new_decode_dev(stat->st_rdev);
|
|
|
|
|
|
|
|
if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode)))
|
|
|
|
init_special_inode(inode, inode->i_mode, inode->i_rdev);
|
|
|
|
|
|
|
|
i_size_write(inode, stat->st_size);
|
|
|
|
inode->i_blocks = stat->st_blocks;
|
|
|
|
} else {
|
|
|
|
if (stat->st_result_mask & P9_STATS_ATIME) {
|
|
|
|
inode->i_atime.tv_sec = stat->st_atime_sec;
|
|
|
|
inode->i_atime.tv_nsec = stat->st_atime_nsec;
|
|
|
|
}
|
|
|
|
if (stat->st_result_mask & P9_STATS_MTIME) {
|
|
|
|
inode->i_mtime.tv_sec = stat->st_mtime_sec;
|
|
|
|
inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
|
|
|
|
}
|
|
|
|
if (stat->st_result_mask & P9_STATS_CTIME) {
|
|
|
|
inode->i_ctime.tv_sec = stat->st_ctime_sec;
|
|
|
|
inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
|
|
|
|
}
|
|
|
|
if (stat->st_result_mask & P9_STATS_UID)
|
|
|
|
inode->i_uid = stat->st_uid;
|
|
|
|
if (stat->st_result_mask & P9_STATS_GID)
|
|
|
|
inode->i_gid = stat->st_gid;
|
|
|
|
if (stat->st_result_mask & P9_STATS_NLINK)
|
|
|
|
inode->i_nlink = stat->st_nlink;
|
|
|
|
if (stat->st_result_mask & P9_STATS_MODE) {
|
|
|
|
inode->i_mode = stat->st_mode;
|
|
|
|
if ((S_ISBLK(inode->i_mode)) ||
|
|
|
|
(S_ISCHR(inode->i_mode)))
|
|
|
|
init_special_inode(inode, inode->i_mode,
|
|
|
|
inode->i_rdev);
|
|
|
|
}
|
|
|
|
if (stat->st_result_mask & P9_STATS_RDEV)
|
|
|
|
inode->i_rdev = new_decode_dev(stat->st_rdev);
|
|
|
|
if (stat->st_result_mask & P9_STATS_SIZE)
|
|
|
|
i_size_write(inode, stat->st_size);
|
|
|
|
if (stat->st_result_mask & P9_STATS_BLOCKS)
|
|
|
|
inode->i_blocks = stat->st_blocks;
|
|
|
|
}
|
|
|
|
if (stat->st_result_mask & P9_STATS_GEN)
|
|
|
|
inode->i_generation = stat->st_gen;
|
|
|
|
|
|
|
|
/* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
|
|
|
|
* because the inode structure does not have fields for them.
|
|
|
|
*/
|
|
|
|
}
|
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
/**
|
|
|
|
* v9fs_qid2ino - convert qid into inode number
|
|
|
|
* @qid: qid to hash
|
|
|
|
*
|
|
|
|
* BUG: potential for inode number collisions?
|
|
|
|
*/
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
ino_t v9fs_qid2ino(struct p9_qid *qid)
|
2005-09-09 20:04:19 +00:00
|
|
|
{
|
|
|
|
u64 path = qid->path + 2;
|
|
|
|
ino_t i = 0;
|
|
|
|
|
|
|
|
if (sizeof(ino_t) == sizeof(path))
|
|
|
|
memcpy(&i, &path, sizeof(ino_t));
|
|
|
|
else
|
|
|
|
i = (ino_t) (path ^ (path >> 32));
|
|
|
|
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_readlink - read a symlink's location (internal version)
|
|
|
|
* @dentry: dentry for symlink
|
2005-09-09 20:04:26 +00:00
|
|
|
* @buffer: buffer to load symlink location into
|
2005-09-09 20:04:19 +00:00
|
|
|
* @buflen: length of buffer
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
|
|
|
|
{
|
2007-07-10 22:57:28 +00:00
|
|
|
int retval;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *fid;
|
2008-10-16 13:30:07 +00:00
|
|
|
struct p9_wstat *st;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
|
|
|
|
retval = -EPERM;
|
|
|
|
v9ses = v9fs_inode2v9ses(dentry->d_inode);
|
|
|
|
fid = v9fs_fid_lookup(dentry);
|
2007-10-17 19:31:07 +00:00
|
|
|
if (IS_ERR(fid))
|
2007-01-26 08:57:06 +00:00
|
|
|
return PTR_ERR(fid);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2010-06-09 22:59:31 +00:00
|
|
|
if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses))
|
2007-07-10 22:57:28 +00:00
|
|
|
return -EBADF;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
st = p9_client_stat(fid);
|
|
|
|
if (IS_ERR(st))
|
|
|
|
return PTR_ERR(st);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
if (!(st->mode & P9_DMSYMLINK)) {
|
2005-09-09 20:04:19 +00:00
|
|
|
retval = -EINVAL;
|
2007-07-10 22:57:28 +00:00
|
|
|
goto done;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* copy extension buffer into buffer */
|
2008-10-16 13:30:07 +00:00
|
|
|
strncpy(buffer, st->extension, buflen);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS,
|
2008-10-16 13:30:07 +00:00
|
|
|
"%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2009-11-02 14:39:34 +00:00
|
|
|
retval = strnlen(buffer, buflen);
|
2007-07-10 22:57:28 +00:00
|
|
|
done:
|
2010-08-24 18:13:59 +00:00
|
|
|
p9stat_free(st);
|
2007-07-10 22:57:28 +00:00
|
|
|
kfree(st);
|
2005-09-09 20:04:19 +00:00
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_vfs_follow_link - follow a symlink path
|
|
|
|
* @dentry: dentry for symlink
|
|
|
|
* @nd: nameidata
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
|
|
|
|
{
|
|
|
|
int len = 0;
|
|
|
|
char *link = __getname();
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
|
|
|
if (!link)
|
|
|
|
link = ERR_PTR(-ENOMEM);
|
|
|
|
else {
|
2006-03-25 11:07:26 +00:00
|
|
|
len = v9fs_readlink(dentry, link, PATH_MAX);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
|
|
|
if (len < 0) {
|
2005-11-07 08:59:36 +00:00
|
|
|
__putname(link);
|
2005-09-09 20:04:19 +00:00
|
|
|
link = ERR_PTR(len);
|
|
|
|
} else
|
2009-11-02 14:39:34 +00:00
|
|
|
link[min(len, PATH_MAX-1)] = 0;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
nd_set_link(nd, link);
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_vfs_put_link - release a symlink path
|
|
|
|
* @dentry: dentry for symlink
|
|
|
|
* @nd: nameidata
|
2008-03-05 13:08:09 +00:00
|
|
|
* @p: unused
|
2005-09-09 20:04:19 +00:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2008-03-05 13:08:09 +00:00
|
|
|
static void
|
|
|
|
v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
|
2005-09-09 20:04:19 +00:00
|
|
|
{
|
|
|
|
char *s = nd_get_link(nd);
|
|
|
|
|
2008-12-19 22:45:21 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
|
|
|
|
IS_ERR(s) ? "<error>" : s);
|
2005-09-09 20:04:19 +00:00
|
|
|
if (!IS_ERR(s))
|
2005-11-07 08:59:36 +00:00
|
|
|
__putname(s);
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2008-03-05 13:08:09 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_mkspecial - create a special file
|
|
|
|
* @dir: inode to create special file in
|
|
|
|
* @dentry: dentry to create
|
|
|
|
* @mode: mode to create special file
|
|
|
|
* @extension: 9p2000.u format extension string representing special file
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2006-01-08 09:05:00 +00:00
|
|
|
static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
|
|
|
|
int mode, const char *extension)
|
2005-09-09 20:04:19 +00:00
|
|
|
{
|
2007-07-10 22:57:28 +00:00
|
|
|
u32 perm;
|
2006-01-08 09:05:00 +00:00
|
|
|
struct v9fs_session_info *v9ses;
|
2007-07-10 22:57:28 +00:00
|
|
|
struct p9_fid *fid;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2006-03-02 10:54:30 +00:00
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
2010-03-05 18:48:00 +00:00
|
|
|
if (!v9fs_proto_dotu(v9ses)) {
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
|
2006-03-02 10:54:30 +00:00
|
|
|
return -EPERM;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2007-01-26 08:57:06 +00:00
|
|
|
perm = unixmode2p9mode(v9ses, mode);
|
2007-07-10 22:57:28 +00:00
|
|
|
fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
|
|
|
|
P9_OREAD);
|
|
|
|
if (IS_ERR(fid))
|
|
|
|
return PTR_ERR(fid);
|
2007-01-26 08:57:06 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
p9_client_clunk(fid);
|
2006-03-02 10:54:30 +00:00
|
|
|
return 0;
|
2006-01-08 09:05:00 +00:00
|
|
|
}
|
|
|
|
|
2010-06-09 22:59:31 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_symlink_dotl - helper function to create symlinks
|
|
|
|
* @dir: directory inode containing symlink
|
|
|
|
* @dentry: dentry for symlink
|
|
|
|
* @symname: symlink data
|
|
|
|
*
|
|
|
|
* See Also: 9P2000.L RFC for more information
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
|
|
|
|
const char *symname)
|
|
|
|
{
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *dfid;
|
|
|
|
struct p9_fid *fid = NULL;
|
|
|
|
struct inode *inode;
|
|
|
|
struct p9_qid qid;
|
|
|
|
char *name;
|
|
|
|
int err;
|
|
|
|
gid_t gid;
|
|
|
|
|
|
|
|
name = (char *) dentry->d_name.name;
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n",
|
|
|
|
dir->i_ino, name, symname);
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
|
|
|
|
dfid = v9fs_fid_lookup(dentry->d_parent);
|
|
|
|
if (IS_ERR(dfid)) {
|
|
|
|
err = PTR_ERR(dfid);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
gid = v9fs_get_fsgid_for_create(dir);
|
|
|
|
|
|
|
|
/* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
|
|
|
|
err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
|
|
|
|
|
|
|
|
if (err < 0) {
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (v9ses->cache) {
|
|
|
|
/* Now walk from the parent so we can get an unopened fid. */
|
|
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
|
|
if (IS_ERR(fid)) {
|
|
|
|
err = PTR_ERR(fid);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
|
|
|
|
err);
|
|
|
|
fid = NULL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* instantiate inode and assign the unopened fid to dentry */
|
|
|
|
inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
|
|
if (IS_ERR(inode)) {
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
|
|
|
|
err);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
dentry->d_op = &v9fs_cached_dentry_operations;
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
err = v9fs_fid_add(dentry, fid);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
fid = NULL;
|
|
|
|
} else {
|
|
|
|
/* Not in cached mode. No need to populate inode with stat */
|
|
|
|
inode = v9fs_get_inode(dir->i_sb, S_IFLNK);
|
|
|
|
if (IS_ERR(inode)) {
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
dentry->d_op = &v9fs_dentry_operations;
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
}
|
|
|
|
|
|
|
|
error:
|
|
|
|
if (fid)
|
|
|
|
p9_client_clunk(fid);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2006-01-08 09:05:00 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_symlink - helper function to create symlinks
|
|
|
|
* @dir: directory inode containing symlink
|
|
|
|
* @dentry: dentry for symlink
|
|
|
|
* @symname: symlink data
|
|
|
|
*
|
2008-03-05 13:08:09 +00:00
|
|
|
* See Also: 9P2000.u RFC for more information
|
2006-01-08 09:05:00 +00:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
|
|
|
|
{
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
|
|
|
|
dentry->d_name.name, symname);
|
2006-01-08 09:05:00 +00:00
|
|
|
|
|
|
|
return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* v9fs_vfs_link - create a hardlink
|
|
|
|
* @old_dentry: dentry for file to link to
|
|
|
|
* @dir: inode destination for new link
|
|
|
|
* @dentry: dentry for link
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
|
|
|
|
struct dentry *dentry)
|
|
|
|
{
|
|
|
|
int retval;
|
2007-07-10 22:57:28 +00:00
|
|
|
struct p9_fid *oldfid;
|
2006-01-08 09:05:00 +00:00
|
|
|
char *name;
|
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS,
|
|
|
|
" %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
|
2006-01-08 09:05:00 +00:00
|
|
|
old_dentry->d_name.name);
|
|
|
|
|
2007-01-26 08:57:06 +00:00
|
|
|
oldfid = v9fs_fid_clone(old_dentry);
|
2007-10-17 19:31:07 +00:00
|
|
|
if (IS_ERR(oldfid))
|
2007-01-26 08:57:06 +00:00
|
|
|
return PTR_ERR(oldfid);
|
2006-01-08 09:05:00 +00:00
|
|
|
|
|
|
|
name = __getname();
|
2007-01-26 08:57:06 +00:00
|
|
|
if (unlikely(!name)) {
|
|
|
|
retval = -ENOMEM;
|
|
|
|
goto clunk_fid;
|
|
|
|
}
|
2006-06-25 12:48:31 +00:00
|
|
|
|
2006-03-25 11:07:26 +00:00
|
|
|
sprintf(name, "%d\n", oldfid->fid);
|
2007-07-10 22:57:28 +00:00
|
|
|
retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
|
2006-01-08 09:05:00 +00:00
|
|
|
__putname(name);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-01-26 08:57:06 +00:00
|
|
|
clunk_fid:
|
2007-07-10 22:57:28 +00:00
|
|
|
p9_client_clunk(oldfid);
|
2005-09-09 20:04:19 +00:00
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2010-08-02 19:28:09 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_link_dotl - create a hardlink for dotl
|
|
|
|
* @old_dentry: dentry for file to link to
|
|
|
|
* @dir: inode destination for new link
|
|
|
|
* @dentry: dentry for link
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
|
|
|
|
struct dentry *dentry)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
struct p9_fid *dfid, *oldfid;
|
|
|
|
char *name;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct dentry *dir_dentry;
|
|
|
|
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
|
|
|
|
dir->i_ino, old_dentry->d_name.name,
|
|
|
|
dentry->d_name.name);
|
|
|
|
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
dir_dentry = v9fs_dentry_from_dir_inode(dir);
|
|
|
|
dfid = v9fs_fid_lookup(dir_dentry);
|
|
|
|
if (IS_ERR(dfid))
|
|
|
|
return PTR_ERR(dfid);
|
|
|
|
|
|
|
|
oldfid = v9fs_fid_lookup(old_dentry);
|
|
|
|
if (IS_ERR(oldfid))
|
|
|
|
return PTR_ERR(oldfid);
|
|
|
|
|
|
|
|
name = (char *) dentry->d_name.name;
|
|
|
|
|
|
|
|
err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
|
|
|
|
|
|
|
|
if (err < 0) {
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
|
|
|
/* Get the latest stat info from server. */
|
|
|
|
struct p9_fid *fid;
|
|
|
|
struct p9_stat_dotl *st;
|
|
|
|
|
|
|
|
fid = v9fs_fid_lookup(old_dentry);
|
|
|
|
if (IS_ERR(fid))
|
|
|
|
return PTR_ERR(fid);
|
|
|
|
|
|
|
|
st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
|
|
|
|
if (IS_ERR(st))
|
|
|
|
return PTR_ERR(st);
|
|
|
|
|
|
|
|
v9fs_stat2inode_dotl(st, old_dentry->d_inode);
|
|
|
|
|
|
|
|
kfree(st);
|
|
|
|
} else {
|
|
|
|
/* Caching disabled. No need to get upto date stat info.
|
2010-10-23 15:11:40 +00:00
|
|
|
* This dentry will be released immediately. So, just hold the
|
|
|
|
* inode
|
2010-08-02 19:28:09 +00:00
|
|
|
*/
|
2010-10-23 15:11:40 +00:00
|
|
|
ihold(old_dentry->d_inode);
|
2010-08-02 19:28:09 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
dentry->d_op = old_dentry->d_op;
|
|
|
|
d_instantiate(dentry, old_dentry->d_inode);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2005-09-09 20:04:19 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_mknod - create a special file
|
|
|
|
* @dir: inode destination for new link
|
|
|
|
* @dentry: dentry for file
|
|
|
|
* @mode: mode for creation
|
2008-03-05 13:08:09 +00:00
|
|
|
* @rdev: device associated with special file
|
2005-09-09 20:04:19 +00:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
|
|
|
|
{
|
2006-01-08 09:05:00 +00:00
|
|
|
int retval;
|
|
|
|
char *name;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2007-07-10 22:57:28 +00:00
|
|
|
P9_DPRINTK(P9_DEBUG_VFS,
|
|
|
|
" %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
|
2005-09-09 20:04:19 +00:00
|
|
|
dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
|
|
|
|
|
2006-01-08 09:05:00 +00:00
|
|
|
if (!new_valid_dev(rdev))
|
|
|
|
return -EINVAL;
|
2005-09-09 20:04:19 +00:00
|
|
|
|
2006-01-08 09:05:00 +00:00
|
|
|
name = __getname();
|
2006-03-25 11:07:27 +00:00
|
|
|
if (!name)
|
|
|
|
return -ENOMEM;
|
2005-09-09 20:04:19 +00:00
|
|
|
/* build extension */
|
|
|
|
if (S_ISBLK(mode))
|
2006-01-08 09:05:00 +00:00
|
|
|
sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
|
2005-09-09 20:04:19 +00:00
|
|
|
else if (S_ISCHR(mode))
|
2006-01-08 09:05:00 +00:00
|
|
|
sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
|
2005-09-09 20:04:26 +00:00
|
|
|
else if (S_ISFIFO(mode))
|
2006-01-08 09:05:00 +00:00
|
|
|
*name = 0;
|
2010-05-22 17:20:30 +00:00
|
|
|
else if (S_ISSOCK(mode))
|
|
|
|
*name = 0;
|
2005-09-09 20:04:19 +00:00
|
|
|
else {
|
2006-01-08 09:05:00 +00:00
|
|
|
__putname(name);
|
|
|
|
return -EINVAL;
|
2005-09-09 20:04:19 +00:00
|
|
|
}
|
|
|
|
|
2006-01-08 09:05:00 +00:00
|
|
|
retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
|
|
|
|
__putname(name);
|
2005-09-09 20:04:19 +00:00
|
|
|
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2010-06-16 08:57:01 +00:00
|
|
|
/**
|
|
|
|
* v9fs_vfs_mknod_dotl - create a special file
|
|
|
|
* @dir: inode destination for new link
|
|
|
|
* @dentry: dentry for file
|
|
|
|
* @mode: mode for creation
|
|
|
|
* @rdev: device associated with special file
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode,
|
|
|
|
dev_t rdev)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
char *name;
|
|
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
struct p9_fid *fid = NULL, *dfid = NULL;
|
|
|
|
struct inode *inode;
|
|
|
|
gid_t gid;
|
|
|
|
struct p9_qid qid;
|
2010-06-16 08:57:22 +00:00
|
|
|
struct dentry *dir_dentry;
|
2010-06-16 08:57:01 +00:00
|
|
|
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS,
|
|
|
|
" %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
|
|
|
|
dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
|
|
|
|
|
|
|
|
if (!new_valid_dev(rdev))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
dir_dentry = v9fs_dentry_from_dir_inode(dir);
|
2010-06-16 08:57:22 +00:00
|
|
|
dfid = v9fs_fid_lookup(dir_dentry);
|
2010-06-16 08:57:01 +00:00
|
|
|
if (IS_ERR(dfid)) {
|
|
|
|
err = PTR_ERR(dfid);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
|
|
dfid = NULL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
gid = v9fs_get_fsgid_for_create(dir);
|
|
|
|
|
|
|
|
name = (char *) dentry->d_name.name;
|
|
|
|
|
|
|
|
err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
/* instantiate inode and assign the unopened fid to the dentry */
|
|
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
|
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
|
|
if (IS_ERR(fid)) {
|
|
|
|
err = PTR_ERR(fid);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
|
|
|
|
err);
|
|
|
|
fid = NULL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
|
|
if (IS_ERR(inode)) {
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
|
|
|
|
err);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
dentry->d_op = &v9fs_cached_dentry_operations;
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
err = v9fs_fid_add(dentry, fid);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
fid = NULL;
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* Not in cached mode. No need to populate inode with stat.
|
|
|
|
* socket syscall returns a fd, so we need instantiate
|
|
|
|
*/
|
|
|
|
inode = v9fs_get_inode(dir->i_sb, mode);
|
|
|
|
if (IS_ERR(inode)) {
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
dentry->d_op = &v9fs_dentry_operations;
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
}
|
|
|
|
|
|
|
|
error:
|
|
|
|
if (fid)
|
|
|
|
p9_client_clunk(fid);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2010-03-25 12:41:54 +00:00
|
|
|
static const struct inode_operations v9fs_dir_inode_operations_dotu = {
|
|
|
|
.create = v9fs_vfs_create,
|
|
|
|
.lookup = v9fs_vfs_lookup,
|
|
|
|
.symlink = v9fs_vfs_symlink,
|
2010-06-09 22:59:31 +00:00
|
|
|
.link = v9fs_vfs_link,
|
2010-03-25 12:41:54 +00:00
|
|
|
.unlink = v9fs_vfs_unlink,
|
|
|
|
.mkdir = v9fs_vfs_mkdir,
|
|
|
|
.rmdir = v9fs_vfs_rmdir,
|
2010-08-30 17:43:07 +00:00
|
|
|
.mknod = v9fs_vfs_mknod,
|
2010-03-25 12:41:54 +00:00
|
|
|
.rename = v9fs_vfs_rename,
|
|
|
|
.getattr = v9fs_vfs_getattr,
|
|
|
|
.setattr = v9fs_vfs_setattr,
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct inode_operations v9fs_dir_inode_operations_dotl = {
|
2010-06-18 01:27:46 +00:00
|
|
|
.create = v9fs_vfs_create_dotl,
|
2005-09-09 20:04:19 +00:00
|
|
|
.lookup = v9fs_vfs_lookup,
|
2010-06-09 22:59:31 +00:00
|
|
|
.link = v9fs_vfs_link_dotl,
|
|
|
|
.symlink = v9fs_vfs_symlink_dotl,
|
2005-09-09 20:04:19 +00:00
|
|
|
.unlink = v9fs_vfs_unlink,
|
2010-06-16 08:57:22 +00:00
|
|
|
.mkdir = v9fs_vfs_mkdir_dotl,
|
2005-09-09 20:04:19 +00:00
|
|
|
.rmdir = v9fs_vfs_rmdir,
|
2010-06-16 08:57:01 +00:00
|
|
|
.mknod = v9fs_vfs_mknod_dotl,
|
2005-09-09 20:04:19 +00:00
|
|
|
.rename = v9fs_vfs_rename,
|
9p: getattr client implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for
9P2000.L. It introduces a new structure p9_stat_dotl for getting
Linux stat information along with QID. The data layout is similar to
stat structure in Linux user space with the following major
differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense
on the client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
2010-07-12 14:37:23 +00:00
|
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
9p: Implement client side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to
p9_iattr_dotl structure and passes it down to the client. The
only check it has is calling inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file
parameters because I don't think these are needed in our case.
The client user space can request updating just ctime by calling
chown(fd, -1, -1). This is handled on server side without a need
for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and
size of the file.
*) 9P RFC says "Either all the changes in wstat request happen, or
none of them does: if the request succeeds, all changes were made;
if it fails, none were."
I have not done anything to implement this specifically because I
don't see a reason.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2010-06-18 06:20:10 +00:00
|
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
2010-05-31 07:52:56 +00:00
|
|
|
.setxattr = generic_setxattr,
|
|
|
|
.getxattr = generic_getxattr,
|
|
|
|
.removexattr = generic_removexattr,
|
|
|
|
.listxattr = v9fs_listxattr,
|
2010-09-27 18:57:39 +00:00
|
|
|
.check_acl = v9fs_check_acl,
|
2005-09-09 20:04:19 +00:00
|
|
|
};
|
|
|
|
|
2007-02-12 08:55:38 +00:00
|
|
|
static const struct inode_operations v9fs_dir_inode_operations = {
|
2005-09-09 20:04:27 +00:00
|
|
|
.create = v9fs_vfs_create,
|
|
|
|
.lookup = v9fs_vfs_lookup,
|
|
|
|
.unlink = v9fs_vfs_unlink,
|
|
|
|
.mkdir = v9fs_vfs_mkdir,
|
|
|
|
.rmdir = v9fs_vfs_rmdir,
|
|
|
|
.mknod = v9fs_vfs_mknod,
|
|
|
|
.rename = v9fs_vfs_rename,
|
|
|
|
.getattr = v9fs_vfs_getattr,
|
|
|
|
.setattr = v9fs_vfs_setattr,
|
|
|
|
};
|
|
|
|
|
2007-02-12 08:55:38 +00:00
|
|
|
static const struct inode_operations v9fs_file_inode_operations = {
|
2005-09-09 20:04:19 +00:00
|
|
|
.getattr = v9fs_vfs_getattr,
|
|
|
|
.setattr = v9fs_vfs_setattr,
|
|
|
|
};
|
|
|
|
|
2010-03-25 12:41:54 +00:00
|
|
|
static const struct inode_operations v9fs_file_inode_operations_dotl = {
|
9p: getattr client implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for
9P2000.L. It introduces a new structure p9_stat_dotl for getting
Linux stat information along with QID. The data layout is similar to
stat structure in Linux user space with the following major
differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense
on the client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
2010-07-12 14:37:23 +00:00
|
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
9p: Implement client side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to
p9_iattr_dotl structure and passes it down to the client. The
only check it has is calling inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file
parameters because I don't think these are needed in our case.
The client user space can request updating just ctime by calling
chown(fd, -1, -1). This is handled on server side without a need
for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and
size of the file.
*) 9P RFC says "Either all the changes in wstat request happen, or
none of them does: if the request succeeds, all changes were made;
if it fails, none were."
I have not done anything to implement this specifically because I
don't see a reason.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2010-06-18 06:20:10 +00:00
|
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
2010-05-31 07:52:56 +00:00
|
|
|
.setxattr = generic_setxattr,
|
|
|
|
.getxattr = generic_getxattr,
|
|
|
|
.removexattr = generic_removexattr,
|
|
|
|
.listxattr = v9fs_listxattr,
|
2010-09-27 18:57:39 +00:00
|
|
|
.check_acl = v9fs_check_acl,
|
2010-03-25 12:41:54 +00:00
|
|
|
};
|
|
|
|
|
2007-02-12 08:55:38 +00:00
|
|
|
static const struct inode_operations v9fs_symlink_inode_operations = {
|
2009-12-23 05:35:54 +00:00
|
|
|
.readlink = generic_readlink,
|
2005-09-09 20:04:19 +00:00
|
|
|
.follow_link = v9fs_vfs_follow_link,
|
|
|
|
.put_link = v9fs_vfs_put_link,
|
|
|
|
.getattr = v9fs_vfs_getattr,
|
|
|
|
.setattr = v9fs_vfs_setattr,
|
|
|
|
};
|
2010-03-25 12:41:54 +00:00
|
|
|
|
|
|
|
static const struct inode_operations v9fs_symlink_inode_operations_dotl = {
|
|
|
|
.readlink = generic_readlink,
|
|
|
|
.follow_link = v9fs_vfs_follow_link,
|
|
|
|
.put_link = v9fs_vfs_put_link,
|
9p: getattr client implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for
9P2000.L. It introduces a new structure p9_stat_dotl for getting
Linux stat information along with QID. The data layout is similar to
stat structure in Linux user space with the following major
differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense
on the client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
2010-07-12 14:37:23 +00:00
|
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
9p: Implement client side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to
p9_iattr_dotl structure and passes it down to the client. The
only check it has is calling inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file
parameters because I don't think these are needed in our case.
The client user space can request updating just ctime by calling
chown(fd, -1, -1). This is handled on server side without a need
for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and
size of the file.
*) 9P RFC says "Either all the changes in wstat request happen, or
none of them does: if the request succeeds, all changes were made;
if it fails, none were."
I have not done anything to implement this specifically because I
don't see a reason.
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2010-06-18 06:20:10 +00:00
|
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
2010-05-31 07:52:56 +00:00
|
|
|
.setxattr = generic_setxattr,
|
|
|
|
.getxattr = generic_getxattr,
|
|
|
|
.removexattr = generic_removexattr,
|
|
|
|
.listxattr = v9fs_listxattr,
|
2010-03-25 12:41:54 +00:00
|
|
|
};
|