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/*
* linux / fs / 9 p / vfs_inode . c
*
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* This file contains vfs inode ops for the 9 P2000 protocol .
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*
* Copyright ( C ) 2004 by Eric Van Hensbergen < ericvh @ gmail . com >
* Copyright ( C ) 2002 by Ron Minnich < rminnich @ lanl . gov >
*
* This program is free software ; you can redistribute it and / or modify
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* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation .
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*
* This program is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
* GNU General Public License for more details .
*
* You should have received a copy of the GNU General Public License
* along with this program ; if not , write to :
* Free Software Foundation
* 51 Franklin Street , Fifth Floor
* Boston , MA 02111 - 1301 USA
*
*/
# include <linux/module.h>
# include <linux/errno.h>
# include <linux/fs.h>
# include <linux/file.h>
# include <linux/pagemap.h>
# include <linux/stat.h>
# include <linux/string.h>
# include <linux/inet.h>
# include <linux/namei.h>
# include <linux/idr.h>
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>
2007-05-21 01:22:52 +04:00
# include <linux/sched.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
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# include <linux/slab.h>
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# include <linux/xattr.h>
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# include <linux/posix_acl.h>
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# include <net/9p/9p.h>
# include <net/9p/client.h>
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# include "v9fs.h"
# include "v9fs_vfs.h"
# include "fid.h"
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# include "cache.h"
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# include "xattr.h"
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# include "acl.h"
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static const struct inode_operations v9fs_dir_inode_operations ;
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static const struct inode_operations v9fs_dir_inode_operations_dotu ;
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static const struct inode_operations v9fs_file_inode_operations ;
static const struct inode_operations v9fs_symlink_inode_operations ;
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/**
* unixmode2p9mode - convert unix mode bits to plan 9
* @ v9ses : v9fs session information
* @ mode : mode to convert
*
*/
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static int unixmode2p9mode ( struct v9fs_session_info * v9ses , int mode )
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{
int res ;
res = mode & 0777 ;
if ( S_ISDIR ( mode ) )
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res | = P9_DMDIR ;
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if ( v9fs_proto_dotu ( v9ses ) ) {
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if ( S_ISLNK ( mode ) )
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res | = P9_DMSYMLINK ;
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if ( v9ses - > nodev = = 0 ) {
if ( S_ISSOCK ( mode ) )
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res | = P9_DMSOCKET ;
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if ( S_ISFIFO ( mode ) )
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res | = P9_DMNAMEDPIPE ;
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if ( S_ISBLK ( mode ) )
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res | = P9_DMDEVICE ;
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if ( S_ISCHR ( mode ) )
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res | = P9_DMDEVICE ;
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}
if ( ( mode & S_ISUID ) = = S_ISUID )
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res | = P9_DMSETUID ;
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if ( ( mode & S_ISGID ) = = S_ISGID )
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res | = P9_DMSETGID ;
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if ( ( mode & S_ISVTX ) = = S_ISVTX )
res | = P9_DMSETVTX ;
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if ( ( mode & P9_DMLINK ) )
res | = P9_DMLINK ;
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}
return res ;
}
/**
* p9mode2unixmode - convert plan9 mode bits to unix mode bits
* @ v9ses : v9fs session information
* @ mode : mode to convert
*
*/
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static int p9mode2unixmode ( struct v9fs_session_info * v9ses , int mode )
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{
int res ;
res = mode & 0777 ;
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if ( ( mode & P9_DMDIR ) = = P9_DMDIR )
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res | = S_IFDIR ;
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else if ( ( mode & P9_DMSYMLINK ) & & ( v9fs_proto_dotu ( v9ses ) ) )
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res | = S_IFLNK ;
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else if ( ( mode & P9_DMSOCKET ) & & ( v9fs_proto_dotu ( v9ses ) )
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& & ( v9ses - > nodev = = 0 ) )
res | = S_IFSOCK ;
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else if ( ( mode & P9_DMNAMEDPIPE ) & & ( v9fs_proto_dotu ( v9ses ) )
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& & ( v9ses - > nodev = = 0 ) )
res | = S_IFIFO ;
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else if ( ( mode & P9_DMDEVICE ) & & ( v9fs_proto_dotu ( v9ses ) )
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& & ( v9ses - > nodev = = 0 ) )
res | = S_IFBLK ;
else
res | = S_IFREG ;
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if ( v9fs_proto_dotu ( v9ses ) ) {
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if ( ( mode & P9_DMSETUID ) = = P9_DMSETUID )
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res | = S_ISUID ;
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if ( ( mode & P9_DMSETGID ) = = P9_DMSETGID )
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res | = S_ISGID ;
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if ( ( mode & P9_DMSETVTX ) = = P9_DMSETVTX )
res | = S_ISVTX ;
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}
return res ;
}
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/**
* v9fs_uflags2omode - convert posix open flags to plan 9 mode bits
* @ uflags : flags to convert
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* @ extended : if . u extensions are active
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*/
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int v9fs_uflags2omode ( int uflags , int extended )
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{
int ret ;
ret = 0 ;
switch ( uflags & 3 ) {
default :
case O_RDONLY :
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ret = P9_OREAD ;
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break ;
case O_WRONLY :
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ret = P9_OWRITE ;
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break ;
case O_RDWR :
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ret = P9_ORDWR ;
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break ;
}
if ( uflags & O_TRUNC )
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ret | = P9_OTRUNC ;
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if ( extended ) {
if ( uflags & O_EXCL )
ret | = P9_OEXCL ;
if ( uflags & O_APPEND )
ret | = P9_OAPPEND ;
}
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return ret ;
}
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/**
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* v9fs_blank_wstat - helper function to setup a 9 P stat structure
* @ wstat : structure to initialize
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*
*/
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void
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v9fs_blank_wstat ( struct p9_wstat * wstat )
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{
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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 ;
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}
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/**
* v9fs_alloc_inode - helper function to allocate an inode
*
*/
struct inode * v9fs_alloc_inode ( struct super_block * sb )
{
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struct v9fs_inode * v9inode ;
v9inode = ( struct v9fs_inode * ) kmem_cache_alloc ( v9fs_inode_cache ,
GFP_KERNEL ) ;
if ( ! v9inode )
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return NULL ;
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# ifdef CONFIG_9P_FSCACHE
v9inode - > fscache = NULL ;
v9inode - > fscache_key = NULL ;
spin_lock_init ( & v9inode - > fscache_lock ) ;
# endif
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v9inode - > writeback_fid = NULL ;
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v9inode - > cache_validity = 0 ;
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mutex_init ( & v9inode - > v_mutex ) ;
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return & v9inode - > vfs_inode ;
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}
/**
* v9fs_destroy_inode - destroy an inode
*
*/
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static void v9fs_i_callback ( struct rcu_head * head )
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{
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struct inode * inode = container_of ( head , struct inode , i_rcu ) ;
INIT_LIST_HEAD ( & inode - > i_dentry ) ;
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kmem_cache_free ( v9fs_inode_cache , V9FS_I ( inode ) ) ;
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}
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void v9fs_destroy_inode ( struct inode * inode )
{
call_rcu ( & inode - > i_rcu , v9fs_i_callback ) ;
}
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int v9fs_init_inode ( struct v9fs_session_info * v9ses ,
struct inode * inode , int mode )
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{
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int err = 0 ;
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2010-03-04 17:30:57 +03:00
inode_init_owner ( inode , NULL , mode ) ;
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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 :
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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 {
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P9_DPRINTK ( P9_DEBUG_ERROR ,
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" special files without extended mode \n " ) ;
err = - EINVAL ;
goto error ;
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}
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init_special_inode ( inode , inode - > i_mode , inode - > i_rdev ) ;
break ;
case S_IFREG :
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if ( v9fs_proto_dotl ( v9ses ) ) {
inode - > i_op = & v9fs_file_inode_operations_dotl ;
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if ( v9ses - > cache )
inode - > i_fop =
& v9fs_cached_file_operations_dotl ;
else
inode - > i_fop = & v9fs_file_operations_dotl ;
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} else {
inode - > i_op = & v9fs_file_inode_operations ;
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if ( v9ses - > cache )
inode - > i_fop = & v9fs_cached_file_operations ;
else
inode - > i_fop = & v9fs_file_operations ;
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}
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break ;
case S_IFLNK :
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if ( ! v9fs_proto_dotu ( v9ses ) & & ! v9fs_proto_dotl ( v9ses ) ) {
P9_DPRINTK ( P9_DEBUG_ERROR , " extended modes used with "
" legacy protocol. \n " ) ;
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err = - EINVAL ;
goto error ;
}
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if ( v9fs_proto_dotl ( v9ses ) )
inode - > i_op = & v9fs_symlink_inode_operations_dotl ;
else
inode - > i_op = & v9fs_symlink_inode_operations ;
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break ;
case S_IFDIR :
inc_nlink ( inode ) ;
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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 ;
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else
inode - > i_op = & v9fs_dir_inode_operations ;
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if ( v9fs_proto_dotl ( v9ses ) )
inode - > i_fop = & v9fs_dir_operations_dotl ;
else
inode - > i_fop = & v9fs_dir_operations ;
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break ;
default :
P9_DPRINTK ( P9_DEBUG_ERROR , " BAD mode 0x%x S_IFMT 0x%x \n " ,
mode , mode & S_IFMT ) ;
err = - EINVAL ;
goto error ;
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}
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error :
return err ;
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}
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/**
* 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 )
{
int err ;
struct inode * inode ;
struct v9fs_session_info * v9ses = sb - > s_fs_info ;
P9_DPRINTK ( P9_DEBUG_VFS , " super block: %p mode: %o \n " , sb , mode ) ;
inode = new_inode ( sb ) ;
if ( ! inode ) {
P9_EPRINTK ( KERN_WARNING , " Problem allocating inode \n " ) ;
return ERR_PTR ( - ENOMEM ) ;
}
err = v9fs_init_inode ( v9ses , inode , mode ) ;
if ( err ) {
iput ( inode ) ;
return ERR_PTR ( err ) ;
}
return inode ;
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}
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/*
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static struct v9fs_fid *
v9fs_clone_walk ( struct v9fs_session_info * v9ses , u32 fid , struct dentry * dentry )
{
int err ;
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int nfid ;
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struct v9fs_fid * ret ;
struct v9fs_fcall * fcall ;
nfid = v9fs_get_idpool ( & v9ses - > fidpool ) ;
if ( nfid < 0 ) {
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eprintk ( KERN_WARNING , " no free fids available \n " ) ;
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return ERR_PTR ( - ENOSPC ) ;
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}
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err = v9fs_t_walk ( v9ses , fid , nfid , ( char * ) dentry - > d_name . name ,
& fcall ) ;
if ( err < 0 ) {
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if ( fcall & & fcall - > id = = RWALK )
goto clunk_fid ;
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PRINT_FCALL_ERROR ( " walk error " , fcall ) ;
v9fs_put_idpool ( nfid , & v9ses - > fidpool ) ;
goto error ;
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}
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kfree ( fcall ) ;
fcall = NULL ;
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ret = v9fs_fid_create ( v9ses , nfid ) ;
if ( ! ret ) {
err = - ENOMEM ;
goto clunk_fid ;
}
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2006-03-02 13:54:30 +03:00
err = v9fs_fid_insert ( ret , dentry ) ;
if ( err < 0 ) {
v9fs_fid_destroy ( ret ) ;
goto clunk_fid ;
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}
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return ret ;
2005-09-10 00:04:19 +04:00
2006-03-02 13:54:30 +03:00
clunk_fid :
v9fs_t_clunk ( v9ses , nfid ) ;
2005-09-10 00:04:19 +04:00
2006-03-02 13:54:30 +03:00
error :
kfree ( fcall ) ;
return ERR_PTR ( err ) ;
}
2007-07-11 02:57:28 +04:00
*/
2005-09-10 00:04:19 +04:00
2009-09-23 22:00:27 +04:00
/**
* v9fs_clear_inode - release an inode
* @ inode : inode to release
*
*/
2010-06-07 22:34:48 +04:00
void v9fs_evict_inode ( struct inode * inode )
2009-09-23 22:00:27 +04:00
{
2011-02-28 14:34:03 +03:00
struct v9fs_inode * v9inode = V9FS_I ( inode ) ;
2010-06-07 22:34:48 +04:00
truncate_inode_pages ( inode - > i_mapping , 0 ) ;
end_writeback ( inode ) ;
2009-09-23 22:00:27 +04:00
filemap_fdatawrite ( inode - > i_mapping ) ;
# ifdef CONFIG_9P_FSCACHE
v9fs_cache_inode_put_cookie ( inode ) ;
# endif
2011-02-28 14:34:03 +03:00
/* clunk the fid stashed in writeback_fid */
if ( v9inode - > writeback_fid ) {
p9_client_clunk ( v9inode - > writeback_fid ) ;
v9inode - > writeback_fid = NULL ;
2011-02-28 14:33:57 +03:00
}
2009-09-23 22:00:27 +04:00
}
2011-02-28 14:34:01 +03:00
static struct inode * v9fs_qid_iget ( struct super_block * sb ,
struct p9_qid * qid ,
struct p9_wstat * st )
2006-03-02 13:54:30 +03:00
{
2011-02-28 14:34:01 +03:00
int retval , umode ;
unsigned long i_ino ;
struct inode * inode ;
struct v9fs_session_info * v9ses = sb - > s_fs_info ;
2005-09-10 00:04:19 +04:00
2011-02-28 14:34:01 +03:00
i_ino = v9fs_qid2ino ( qid ) ;
inode = iget_locked ( sb , i_ino ) ;
if ( ! inode )
return ERR_PTR ( - ENOMEM ) ;
if ( ! ( inode - > i_state & I_NEW ) )
return inode ;
/*
* initialize the inode with the stat info
* FIXME ! ! we may need support for stale inodes
* later .
*/
2007-07-11 02:57:28 +04:00
umode = p9mode2unixmode ( v9ses , st - > mode ) ;
2011-02-28 14:34:01 +03:00
retval = v9fs_init_inode ( v9ses , inode , umode ) ;
if ( retval )
2006-03-02 13:54:30 +03:00
goto error ;
2009-09-23 22:00:27 +04:00
2011-02-28 14:34:01 +03:00
v9fs_stat2inode ( st , inode , sb ) ;
2009-09-23 22:00:27 +04:00
# ifdef CONFIG_9P_FSCACHE
2011-02-28 14:34:02 +03:00
v9fs_fscache_set_key ( inode , & st - > qid ) ;
2011-02-28 14:34:01 +03:00
v9fs_cache_inode_get_cookie ( inode ) ;
2009-09-23 22:00:27 +04:00
# endif
2011-02-28 14:34:01 +03:00
unlock_new_inode ( inode ) ;
return inode ;
2006-03-02 13:54:30 +03:00
error :
2011-02-28 14:34:01 +03:00
unlock_new_inode ( inode ) ;
iput ( inode ) ;
return ERR_PTR ( retval ) ;
}
struct inode *
2011-02-28 14:34:02 +03:00
v9fs_inode_from_fid ( struct v9fs_session_info * v9ses , struct p9_fid * fid ,
struct super_block * sb )
2011-02-28 14:34:01 +03:00
{
struct p9_wstat * st ;
struct inode * inode = NULL ;
st = p9_client_stat ( fid ) ;
if ( IS_ERR ( st ) )
return ERR_CAST ( st ) ;
inode = v9fs_qid_iget ( sb , & st - > qid , st ) ;
2009-07-19 23:41:54 +04:00
p9stat_free ( st ) ;
2007-07-11 02:57:28 +04:00
kfree ( st ) ;
2011-02-28 14:34:01 +03:00
return inode ;
2005-09-10 00:04:19 +04:00
}
/**
* v9fs_remove - helper function to remove files and directories
2005-09-10 00:04:26 +04:00
* @ dir : directory inode that is being deleted
* @ file : dentry that is being deleted
* @ rmdir : removing a directory
2005-09-10 00:04:19 +04:00
*
*/
static int v9fs_remove ( struct inode * dir , struct dentry * file , int rmdir )
{
2010-03-30 03:14:50 +04:00
int retval ;
2007-07-11 02:57:28 +04:00
struct p9_fid * v9fid ;
2011-02-28 14:34:08 +03:00
struct inode * file_inode ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " inode: %p dentry: %p rmdir: %d \n " , dir , file ,
2005-09-10 00:04:19 +04:00
rmdir ) ;
file_inode = file - > d_inode ;
2007-04-24 01:41:11 +04:00
v9fid = v9fs_fid_clone ( file ) ;
2007-10-17 23:31:07 +04:00
if ( IS_ERR ( v9fid ) )
2007-01-26 11:57:06 +03:00
return PTR_ERR ( v9fid ) ;
2005-09-10 00:04:19 +04:00
2010-03-30 03:14:50 +04:00
retval = p9_client_remove ( v9fid ) ;
2011-02-28 14:34:05 +03:00
if ( ! retval ) {
/*
* directories on unlink should have zero
* link count
*/
if ( rmdir ) {
clear_nlink ( file_inode ) ;
drop_nlink ( dir ) ;
} else
drop_nlink ( file_inode ) ;
2011-02-28 14:34:08 +03:00
2011-02-28 14:34:07 +03:00
v9fs_invalidate_inode_attr ( file_inode ) ;
2011-02-28 14:34:08 +03:00
v9fs_invalidate_inode_attr ( dir ) ;
2011-02-28 14:34:05 +03:00
}
2010-03-30 03:14:50 +04:00
return retval ;
2005-09-10 00:04:19 +04:00
}
/**
2007-07-11 02:57:28 +04:00
* v9fs_create - Create a file
2008-03-05 16:08:09 +03:00
* @ v9ses : session information
* @ dir : directory that dentry is being created in
2007-07-11 02:57:28 +04:00
* @ dentry : dentry that is being created
2009-07-19 23:41:55 +04:00
* @ extension : 9 p2000 . u extension string to support devices , etc .
2007-07-11 02:57:28 +04:00
* @ perm : create permissions
* @ mode : open mode
2005-09-10 00:04:19 +04:00
*
*/
2007-07-11 02:57:28 +04:00
static struct p9_fid *
v9fs_create ( struct v9fs_session_info * v9ses , struct inode * dir ,
struct dentry * dentry , char * extension , u32 perm , u8 mode )
2005-09-10 00:04:19 +04:00
{
2006-03-02 13:54:30 +03:00
int err ;
2007-07-11 02:57:28 +04:00
char * name ;
struct p9_fid * dfid , * ofid , * fid ;
2006-03-02 13:54:30 +03:00
struct inode * inode ;
2008-10-16 17:30:07 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " name %s \n " , dentry - > d_name . name ) ;
2007-07-11 02:57:28 +04:00
err = 0 ;
ofid = NULL ;
fid = NULL ;
name = ( char * ) dentry - > d_name . name ;
2010-05-10 22:08:28 +04:00
dfid = v9fs_fid_lookup ( dentry - > d_parent ) ;
2007-10-17 23:31:07 +04:00
if ( IS_ERR ( dfid ) ) {
2007-01-26 11:57:06 +03:00
err = PTR_ERR ( dfid ) ;
2010-05-10 22:08:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " fid lookup failed %d \n " , err ) ;
return ERR_PTR ( err ) ;
2007-01-26 11:57:06 +03:00
}
2006-03-02 13:54:30 +03:00
2007-07-11 02:57:28 +04:00
/* 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 17:30:07 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " p9_client_walk failed %d \n " , err ) ;
2010-05-10 22:08:28 +04:00
return ERR_PTR ( err ) ;
2007-07-11 02:57:28 +04:00
}
2006-03-02 13:54:30 +03:00
2007-07-11 02:57:28 +04:00
err = p9_client_fcreate ( ofid , name , perm , mode , extension ) ;
2008-10-16 17:30:07 +04:00
if ( err < 0 ) {
P9_DPRINTK ( P9_DEBUG_VFS , " p9_client_fcreate failed %d \n " , err ) ;
2007-07-11 02:57:28 +04:00
goto error ;
2008-10-16 17:30:07 +04:00
}
2006-03-02 13:54:30 +03:00
2007-07-11 02:57:28 +04:00
/* now walk from the parent so we can get unopened fid */
2010-05-10 22:08:28 +04:00
fid = p9_client_walk ( dfid , 1 , & name , 1 ) ;
2007-07-11 02:57:28 +04:00
if ( IS_ERR ( fid ) ) {
err = PTR_ERR ( fid ) ;
2008-10-16 17:30:07 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " p9_client_walk failed %d \n " , err ) ;
2007-07-11 02:57:28 +04:00
fid = NULL ;
2006-03-02 13:54:30 +03:00
goto error ;
2010-05-10 22:08:28 +04:00
}
2006-03-02 13:54:30 +03:00
2007-07-11 02:57:28 +04:00
/* instantiate inode and assign the unopened fid to the dentry */
2011-02-28 14:34:02 +03:00
inode = v9fs_get_inode_from_fid ( v9ses , fid , dir - > i_sb ) ;
2006-03-02 13:54:30 +03:00
if ( IS_ERR ( inode ) ) {
err = PTR_ERR ( inode ) ;
2008-10-16 17:30:07 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " inode creation failed %d \n " , err ) ;
2006-03-02 13:54:30 +03:00
goto error ;
}
d_instantiate ( dentry , inode ) ;
2009-07-19 23:41:57 +04:00
err = v9fs_fid_add ( dentry , fid ) ;
if ( err < 0 )
goto error ;
2007-07-11 02:57:28 +04:00
return ofid ;
2006-03-02 13:54:30 +03:00
2007-07-11 02:57:28 +04:00
error :
if ( ofid )
p9_client_clunk ( ofid ) ;
if ( fid )
p9_client_clunk ( fid ) ;
return ERR_PTR ( err ) ;
}
/**
* v9fs_vfs_create - VFS hook to create files
2008-03-05 16:08:09 +03:00
* @ dir : directory inode that is being created
2007-07-11 02:57:28 +04:00
* @ dentry : dentry that is being deleted
* @ mode : create permissions
* @ nd : path information
*
*/
2006-03-02 13:54:30 +03:00
2007-07-11 02:57:28 +04:00
static int
v9fs_vfs_create ( struct inode * dir , struct dentry * dentry , int mode ,
struct nameidata * nd )
{
int err ;
u32 perm ;
int flags ;
2011-02-28 14:34:03 +03:00
struct file * filp ;
struct v9fs_inode * v9inode ;
2007-07-11 02:57:28 +04:00
struct v9fs_session_info * v9ses ;
2011-02-28 14:33:57 +03:00
struct p9_fid * fid , * inode_fid ;
2007-07-11 02:57:28 +04:00
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 21:48:00 +03:00
v9fs_uflags2omode ( flags ,
v9fs_proto_dotu ( v9ses ) ) ) ;
2007-07-11 02:57:28 +04:00
if ( IS_ERR ( fid ) ) {
err = PTR_ERR ( fid ) ;
fid = NULL ;
goto error ;
}
2011-02-28 14:34:08 +03:00
v9fs_invalidate_inode_attr ( dir ) ;
2007-07-11 02:57:28 +04:00
/* if we are opening a file, assign the open fid to the file */
if ( nd & & nd - > flags & LOOKUP_OPEN ) {
2011-02-28 14:34:03 +03:00
v9inode = V9FS_I ( dentry - > d_inode ) ;
2011-03-08 14:09:46 +03:00
mutex_lock ( & v9inode - > v_mutex ) ;
2011-03-08 14:09:49 +03:00
if ( v9ses - > cache & & ! v9inode - > writeback_fid & &
( ( flags & O_ACCMODE ) ! = O_RDONLY ) ) {
2011-02-28 14:33:57 +03:00
/*
2011-02-28 14:34:03 +03:00
* clone a fid and add it to writeback_fid
2011-02-28 14:33:57 +03:00
* we do it during open time instead of
* page dirty time via write_begin / page_mkwrite
* because we want write after unlink usecase
* to work .
*/
inode_fid = v9fs_writeback_fid ( dentry ) ;
if ( IS_ERR ( inode_fid ) ) {
err = PTR_ERR ( inode_fid ) ;
2011-03-08 14:09:46 +03:00
mutex_unlock ( & v9inode - > v_mutex ) ;
2011-02-28 14:33:57 +03:00
goto error ;
}
2011-02-28 14:34:03 +03:00
v9inode - > writeback_fid = ( void * ) inode_fid ;
2011-02-28 14:33:57 +03:00
}
2011-03-08 14:09:46 +03:00
mutex_unlock ( & v9inode - > v_mutex ) ;
2010-09-22 11:12:30 +04:00
filp = lookup_instantiate_filp ( nd , dentry , generic_file_open ) ;
2006-03-02 13:54:30 +03:00
if ( IS_ERR ( filp ) ) {
2007-07-11 02:57:28 +04:00
err = PTR_ERR ( filp ) ;
goto error ;
2006-03-02 13:54:30 +03:00
}
2007-07-11 02:57:28 +04:00
filp - > private_data = fid ;
2011-02-28 14:33:55 +03:00
# ifdef CONFIG_9P_FSCACHE
if ( v9ses - > cache )
v9fs_cache_inode_set_cookie ( dentry - > d_inode , filp ) ;
# endif
2007-07-11 02:57:28 +04:00
} else
p9_client_clunk ( fid ) ;
2006-03-02 13:54:30 +03:00
return 0 ;
error :
2007-07-11 02:57:28 +04:00
if ( fid )
p9_client_clunk ( fid ) ;
2006-03-02 13:54:30 +03:00
return err ;
2005-09-10 00:04:19 +04:00
}
/**
* v9fs_vfs_mkdir - VFS mkdir hook to create a directory
2008-03-05 16:08:09 +03:00
* @ dir : inode that is being unlinked
2005-09-10 00:04:19 +04:00
* @ dentry : dentry that is being unlinked
* @ mode : mode for new directory
*
*/
2006-03-02 13:54:30 +03:00
static int v9fs_vfs_mkdir ( struct inode * dir , struct dentry * dentry , int mode )
2005-09-10 00:04:19 +04:00
{
2006-03-02 13:54:30 +03:00
int err ;
2007-07-11 02:57:28 +04:00
u32 perm ;
struct p9_fid * fid ;
2011-02-28 14:34:08 +03:00
struct v9fs_session_info * v9ses ;
2006-03-02 13:54:30 +03:00
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " name %s \n " , dentry - > d_name . name ) ;
err = 0 ;
2006-03-02 13:54:30 +03:00
v9ses = v9fs_inode2v9ses ( dir ) ;
perm = unixmode2p9mode ( v9ses , mode | S_IFDIR ) ;
2007-07-11 02:57:28 +04:00
fid = v9fs_create ( v9ses , dir , dentry , NULL , perm , P9_OREAD ) ;
if ( IS_ERR ( fid ) ) {
err = PTR_ERR ( fid ) ;
fid = NULL ;
2011-02-28 14:34:08 +03:00
} else {
2011-02-28 14:34:05 +03:00
inc_nlink ( dir ) ;
2011-02-28 14:34:08 +03:00
v9fs_invalidate_inode_attr ( dir ) ;
}
2006-03-02 13:54:30 +03:00
2007-07-11 02:57:28 +04:00
if ( fid )
p9_client_clunk ( fid ) ;
2006-03-02 13:54:30 +03:00
return err ;
2005-09-10 00:04:19 +04:00
}
/**
* 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
*
*/
2011-01-10 22:51:47 +03:00
struct dentry * v9fs_vfs_lookup ( struct inode * dir , struct dentry * dentry ,
2005-09-10 00:04:19 +04:00
struct nameidata * nameidata )
{
struct super_block * sb ;
struct v9fs_session_info * v9ses ;
2007-07-11 02:57:28 +04:00
struct p9_fid * dfid , * fid ;
2005-09-10 00:04:19 +04:00
struct inode * inode ;
2007-07-11 02:57:28 +04:00
char * name ;
2005-09-10 00:04:19 +04:00
int result = 0 ;
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " dir: %p dentry: (%s) %p nameidata: %p \n " ,
2006-03-08 08:55:42 +03:00
dir , dentry - > d_name . name , dentry , nameidata ) ;
2005-09-10 00:04:19 +04:00
2010-03-30 03:13:59 +04:00
if ( dentry - > d_name . len > NAME_MAX )
return ERR_PTR ( - ENAMETOOLONG ) ;
2005-09-10 00:04:19 +04:00
sb = dir - > i_sb ;
v9ses = v9fs_inode2v9ses ( dir ) ;
2010-06-30 17:48:50 +04:00
/* We can walk d_parent because we hold the dir->i_mutex */
2007-07-11 02:57:28 +04:00
dfid = v9fs_fid_lookup ( dentry - > d_parent ) ;
if ( IS_ERR ( dfid ) )
2008-02-07 11:15:26 +03:00
return ERR_CAST ( dfid ) ;
2007-07-11 02:57:28 +04:00
name = ( char * ) dentry - > d_name . name ;
fid = p9_client_walk ( dfid , 1 , & name , 1 ) ;
if ( IS_ERR ( fid ) ) {
result = PTR_ERR ( fid ) ;
2005-09-10 00:04:19 +04:00
if ( result = = - ENOENT ) {
2010-05-14 17:04:39 +04:00
inode = NULL ;
goto inst_out ;
2005-09-10 00:04:19 +04:00
}
2007-07-11 02:57:28 +04:00
return ERR_PTR ( result ) ;
2005-09-10 00:04:19 +04:00
}
2011-02-28 14:34:02 +03:00
inode = v9fs_get_inode_from_fid ( v9ses , fid , dir - > i_sb ) ;
2007-07-11 02:57:28 +04:00
if ( IS_ERR ( inode ) ) {
result = PTR_ERR ( inode ) ;
inode = NULL ;
goto error ;
2005-09-10 00:04:19 +04:00
}
2007-07-11 02:57:28 +04:00
result = v9fs_fid_add ( dentry , fid ) ;
2006-03-02 13:54:30 +03:00
if ( result < 0 )
2010-09-22 10:54:23 +04:00
goto error_iput ;
2006-03-02 13:54:30 +03:00
2010-05-14 17:04:39 +04:00
inst_out :
2005-09-10 00:04:19 +04:00
d_add ( dentry , inode ) ;
return NULL ;
2010-09-22 10:54:23 +04:00
error_iput :
iput ( inode ) ;
2007-07-11 02:57:28 +04:00
error :
2008-09-25 01:22:22 +04:00
p9_client_clunk ( fid ) ;
2007-01-26 11:57:06 +03:00
2005-09-10 00:04:19 +04:00
return ERR_PTR ( result ) ;
}
/**
* v9fs_vfs_unlink - VFS unlink hook to delete an inode
* @ i : inode that is being unlinked
2005-09-10 00:04:26 +04:00
* @ d : dentry that is being unlinked
2005-09-10 00:04:19 +04:00
*
*/
2011-01-10 22:51:47 +03:00
int v9fs_vfs_unlink ( struct inode * i , struct dentry * d )
2005-09-10 00:04:19 +04:00
{
return v9fs_remove ( i , d , 0 ) ;
}
/**
* v9fs_vfs_rmdir - VFS unlink hook to delete a directory
* @ i : inode that is being unlinked
2005-09-10 00:04:26 +04:00
* @ d : dentry that is being unlinked
2005-09-10 00:04:19 +04:00
*
*/
2011-01-10 22:51:47 +03:00
int v9fs_vfs_rmdir ( struct inode * i , struct dentry * d )
2005-09-10 00:04:19 +04:00
{
2011-05-25 00:06:06 +04:00
dentry_unhash ( d ) ;
2005-09-10 00:04:19 +04:00
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
*
*/
2011-01-10 22:51:47 +03:00
int
2005-09-10 00:04:19 +04:00
v9fs_vfs_rename ( struct inode * old_dir , struct dentry * old_dentry ,
struct inode * new_dir , struct dentry * new_dentry )
{
2011-02-28 14:34:08 +03:00
int retval ;
2007-07-11 02:57:28 +04:00
struct inode * old_inode ;
2011-02-28 14:34:05 +03:00
struct inode * new_inode ;
2007-07-11 02:57:28 +04:00
struct v9fs_session_info * v9ses ;
struct p9_fid * oldfid ;
struct p9_fid * olddirfid ;
struct p9_fid * newdirfid ;
struct p9_wstat wstat ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " \n " ) ;
retval = 0 ;
old_inode = old_dentry - > d_inode ;
2011-02-28 14:34:05 +03:00
new_inode = new_dentry - > d_inode ;
2007-07-11 02:57:28 +04:00
v9ses = v9fs_inode2v9ses ( old_inode ) ;
oldfid = v9fs_fid_lookup ( old_dentry ) ;
2007-10-17 23:31:07 +04:00
if ( IS_ERR ( oldfid ) )
2007-01-26 11:57:06 +03:00
return PTR_ERR ( oldfid ) ;
olddirfid = v9fs_fid_clone ( old_dentry - > d_parent ) ;
2007-10-17 23:31:07 +04:00
if ( IS_ERR ( olddirfid ) ) {
2007-01-26 11:57:06 +03:00
retval = PTR_ERR ( olddirfid ) ;
2007-07-11 02:57:28 +04:00
goto done ;
2007-01-26 11:57:06 +03:00
}
newdirfid = v9fs_fid_clone ( new_dentry - > d_parent ) ;
2007-10-17 23:31:07 +04:00
if ( IS_ERR ( newdirfid ) ) {
2007-01-26 11:57:06 +03:00
retval = PTR_ERR ( newdirfid ) ;
2007-07-11 02:57:28 +04:00
goto clunk_olddir ;
2005-09-10 00:04:19 +04:00
}
2010-06-30 17:48:50 +04:00
down_write ( & v9ses - > rename_sem ) ;
2010-03-25 15:47:26 +03:00
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 17:48:50 +04:00
if ( old_dentry - > d_parent ! = new_dentry - > d_parent ) {
/*
* 9 P . u can only handle file rename in the same directory
*/
2010-03-25 15:47:26 +03:00
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_ERROR ,
" old dir and new dir are different \n " ) ;
2007-01-26 11:57:04 +03:00
retval = - EXDEV ;
2007-07-11 02:57:28 +04:00
goto clunk_newdir ;
2005-09-10 00:04:19 +04:00
}
2006-01-08 12:05:00 +03:00
v9fs_blank_wstat ( & wstat ) ;
2007-10-17 23:31:07 +04:00
wstat . muid = v9ses - > uname ;
2006-01-08 12:05:00 +03:00
wstat . name = ( char * ) new_dentry - > d_name . name ;
2007-07-11 02:57:28 +04:00
retval = p9_client_wstat ( oldfid , & wstat ) ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
clunk_newdir :
2011-02-28 14:34:05 +03:00
if ( ! retval ) {
if ( new_inode ) {
if ( S_ISDIR ( new_inode - > i_mode ) )
clear_nlink ( new_inode ) ;
else
drop_nlink ( new_inode ) ;
2011-02-28 14:34:08 +03:00
/*
* Work around vfs rename rehash bug with
* FS_RENAME_DOES_D_MOVE
*/
v9fs_invalidate_inode_attr ( new_inode ) ;
2011-02-28 14:34:05 +03:00
}
if ( S_ISDIR ( old_inode - > i_mode ) ) {
if ( ! new_inode )
inc_nlink ( new_dir ) ;
drop_nlink ( old_dir ) ;
}
2011-02-28 14:34:07 +03:00
v9fs_invalidate_inode_attr ( old_inode ) ;
2011-02-28 14:34:08 +03:00
v9fs_invalidate_inode_attr ( old_dir ) ;
v9fs_invalidate_inode_attr ( new_dir ) ;
2011-02-28 14:34:07 +03:00
2010-06-30 17:48:50 +04:00
/* successful rename */
d_move ( old_dentry , new_dentry ) ;
2011-02-28 14:34:05 +03:00
}
2010-06-30 17:48:50 +04:00
up_write ( & v9ses - > rename_sem ) ;
2007-10-23 22:48:33 +04:00
p9_client_clunk ( newdirfid ) ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
clunk_olddir :
2007-10-23 22:48:33 +04:00
p9_client_clunk ( olddirfid ) ;
2007-01-26 11:57:06 +03:00
2007-07-11 02:57:28 +04:00
done :
2005-09-10 00:04:19 +04:00
return retval ;
}
/**
2006-01-10 02:10:13 +03:00
* v9fs_vfs_getattr - retrieve file metadata
2008-03-05 16:08:09 +03:00
* @ mnt : mount information
* @ dentry : file to get attributes on
* @ stat : metadata structure to populate
2005-09-10 00:04:19 +04:00
*
*/
static int
v9fs_vfs_getattr ( struct vfsmount * mnt , struct dentry * dentry ,
struct kstat * stat )
{
2007-07-11 02:57:28 +04:00
int err ;
struct v9fs_session_info * v9ses ;
struct p9_fid * fid ;
2008-10-16 17:30:07 +04:00
struct p9_wstat * st ;
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " dentry: %p \n " , dentry ) ;
err = - EPERM ;
2011-03-08 14:09:50 +03:00
v9ses = v9fs_dentry2v9ses ( dentry ) ;
2011-02-28 14:34:01 +03:00
if ( v9ses - > cache = = CACHE_LOOSE | | v9ses - > cache = = CACHE_FSCACHE ) {
generic_fillattr ( dentry - > d_inode , stat ) ;
return 0 ;
}
2007-07-11 02:57:28 +04:00
fid = v9fs_fid_lookup ( dentry ) ;
if ( IS_ERR ( fid ) )
2007-01-26 11:57:06 +03:00
return PTR_ERR ( fid ) ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
st = p9_client_stat ( fid ) ;
if ( IS_ERR ( st ) )
return PTR_ERR ( st ) ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
v9fs_stat2inode ( st , dentry - > d_inode , dentry - > d_inode - > i_sb ) ;
2005-09-10 00:04:19 +04:00
generic_fillattr ( dentry - > d_inode , stat ) ;
2010-08-24 22:13:59 +04:00
p9stat_free ( st ) ;
2007-07-11 02:57:28 +04:00
kfree ( st ) ;
return 0 ;
2005-09-10 00:04:19 +04:00
}
/**
* 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 )
{
2007-07-11 02:57:28 +04:00
int retval ;
struct v9fs_session_info * v9ses ;
struct p9_fid * fid ;
struct p9_wstat wstat ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " \n " ) ;
2011-03-08 14:09:48 +03:00
retval = inode_change_ok ( dentry - > d_inode , iattr ) ;
if ( retval )
return retval ;
2007-07-11 02:57:28 +04:00
retval = - EPERM ;
2011-03-08 14:09:50 +03:00
v9ses = v9fs_dentry2v9ses ( dentry ) ;
2007-07-11 02:57:28 +04:00
fid = v9fs_fid_lookup ( dentry ) ;
2007-01-26 11:57:06 +03:00
if ( IS_ERR ( fid ) )
return PTR_ERR ( fid ) ;
2005-09-10 00:04:19 +04:00
2006-01-08 12:05:00 +03:00
v9fs_blank_wstat ( & wstat ) ;
2005-09-10 00:04:19 +04:00
if ( iattr - > ia_valid & ATTR_MODE )
2006-01-08 12:05:00 +03:00
wstat . mode = unixmode2p9mode ( v9ses , iattr - > ia_mode ) ;
2005-09-10 00:04:19 +04:00
if ( iattr - > ia_valid & ATTR_MTIME )
2006-01-08 12:05:00 +03:00
wstat . mtime = iattr - > ia_mtime . tv_sec ;
2005-09-10 00:04:19 +04:00
if ( iattr - > ia_valid & ATTR_ATIME )
2006-01-08 12:05:00 +03:00
wstat . atime = iattr - > ia_atime . tv_sec ;
2005-09-10 00:04:19 +04:00
if ( iattr - > ia_valid & ATTR_SIZE )
2006-01-08 12:05:00 +03:00
wstat . length = iattr - > ia_size ;
2005-09-10 00:04:19 +04:00
2010-03-05 21:48:00 +03:00
if ( v9fs_proto_dotu ( v9ses ) ) {
2006-01-08 12:05:00 +03:00
if ( iattr - > ia_valid & ATTR_UID )
wstat . n_uid = iattr - > ia_uid ;
2005-09-10 00:04:19 +04:00
2006-01-08 12:05:00 +03:00
if ( iattr - > ia_valid & ATTR_GID )
wstat . n_gid = iattr - > ia_gid ;
2005-09-10 00:04:19 +04:00
}
2011-03-08 14:09:48 +03:00
2011-02-28 14:34:11 +03:00
/* Write all dirty data */
if ( S_ISREG ( dentry - > d_inode - > i_mode ) )
filemap_write_and_wait ( dentry - > d_inode - > i_mapping ) ;
2011-02-28 14:34:10 +03:00
retval = p9_client_wstat ( fid , & wstat ) ;
if ( retval < 0 )
return retval ;
2011-03-08 14:09:48 +03:00
if ( ( iattr - > ia_valid & ATTR_SIZE ) & &
iattr - > ia_size ! = i_size_read ( dentry - > d_inode ) )
truncate_setsize ( dentry - > d_inode , iattr - > ia_size ) ;
2011-02-28 14:34:10 +03:00
v9fs_invalidate_inode_attr ( dentry - > d_inode ) ;
2005-09-10 00:04:19 +04:00
2010-06-04 13:30:02 +04:00
setattr_copy ( dentry - > d_inode , iattr ) ;
mark_inode_dirty ( dentry - > d_inode ) ;
return 0 ;
2005-09-10 00:04:19 +04:00
}
/**
2006-01-08 12:05:00 +03:00
* v9fs_stat2inode - populate an inode structure with mistat info
* @ stat : Plan 9 metadata ( mistat ) structure
2005-09-10 00:04:19 +04:00
* @ inode : inode to populate
* @ sb : superblock of filesystem
*
*/
void
2008-10-16 17:30:07 +04:00
v9fs_stat2inode ( struct p9_wstat * stat , struct inode * inode ,
2006-01-08 12:05:00 +03:00
struct super_block * sb )
2005-09-10 00:04:19 +04:00
{
2006-01-08 12:05:00 +03:00
char ext [ 32 ] ;
2010-03-05 23:43:43 +03:00
char tag_name [ 14 ] ;
unsigned int i_nlink ;
2005-09-10 00:04:19 +04:00
struct v9fs_session_info * v9ses = sb - > s_fs_info ;
2011-02-28 14:34:06 +03:00
struct v9fs_inode * v9inode = V9FS_I ( inode ) ;
2005-09-10 00:04:19 +04:00
inode - > i_nlink = 1 ;
2006-01-08 12:05:00 +03:00
inode - > i_atime . tv_sec = stat - > atime ;
inode - > i_mtime . tv_sec = stat - > mtime ;
inode - > i_ctime . tv_sec = stat - > mtime ;
2005-09-10 00:04:19 +04:00
2007-10-17 23:31:07 +04:00
inode - > i_uid = v9ses - > dfltuid ;
inode - > i_gid = v9ses - > dfltgid ;
2005-09-10 00:04:19 +04:00
2010-03-05 21:48:00 +03:00
if ( v9fs_proto_dotu ( v9ses ) ) {
2006-01-08 12:05:00 +03:00
inode - > i_uid = stat - > n_uid ;
inode - > i_gid = stat - > n_gid ;
2005-09-10 00:04:19 +04:00
}
2010-03-05 23:43:43 +03:00
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 12:05:00 +03:00
inode - > i_mode = p9mode2unixmode ( v9ses , stat - > mode ) ;
2005-09-10 00:04:19 +04:00
if ( ( S_ISBLK ( inode - > i_mode ) ) | | ( S_ISCHR ( inode - > i_mode ) ) ) {
char type = 0 ;
int major = - 1 ;
int minor = - 1 ;
2006-01-08 12:05:00 +03:00
2008-10-16 17:30:07 +04:00
strncpy ( ext , stat - > extension , sizeof ( ext ) ) ;
2006-01-08 12:05:00 +03:00
sscanf ( ext , " %c %u %u " , & type , & major , & minor ) ;
2005-09-10 00:04:19 +04:00
switch ( type ) {
case ' c ' :
inode - > i_mode & = ~ S_IFBLK ;
inode - > i_mode | = S_IFCHR ;
break ;
case ' b ' :
break ;
default :
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_ERROR ,
2008-10-16 17:30:07 +04:00
" Unknown special type %c %s \n " , type ,
stat - > extension ) ;
2005-09-10 00:04:19 +04:00
} ;
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 21:44:46 +04:00
init_special_inode ( inode , inode - > i_mode , inode - > i_rdev ) ;
2005-09-10 00:04:19 +04:00
} else
inode - > i_rdev = 0 ;
2009-09-22 20:34:05 +04:00
i_size_write ( inode , stat - > length ) ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
/* not real number of blocks, but 512 byte ones ... */
2009-09-22 20:34:05 +04:00
inode - > i_blocks = ( i_size_read ( inode ) + 512 - 1 ) > > 9 ;
2011-02-28 14:34:06 +03:00
v9inode - > cache_validity & = ~ V9FS_INO_INVALID_ATTR ;
2005-09-10 00:04:19 +04:00
}
/**
* v9fs_qid2ino - convert qid into inode number
* @ qid : qid to hash
*
* BUG : potential for inode number collisions ?
*/
2007-07-11 02:57:28 +04:00
ino_t v9fs_qid2ino ( struct p9_qid * qid )
2005-09-10 00:04:19 +04:00
{
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
2005-09-10 00:04:26 +04:00
* @ buffer : buffer to load symlink location into
2005-09-10 00:04:19 +04:00
* @ buflen : length of buffer
*
*/
static int v9fs_readlink ( struct dentry * dentry , char * buffer , int buflen )
{
2007-07-11 02:57:28 +04:00
int retval ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
struct v9fs_session_info * v9ses ;
struct p9_fid * fid ;
2008-10-16 17:30:07 +04:00
struct p9_wstat * st ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " %s \n " , dentry - > d_name . name ) ;
retval = - EPERM ;
2011-03-08 14:09:50 +03:00
v9ses = v9fs_dentry2v9ses ( dentry ) ;
2007-07-11 02:57:28 +04:00
fid = v9fs_fid_lookup ( dentry ) ;
2007-10-17 23:31:07 +04:00
if ( IS_ERR ( fid ) )
2007-01-26 11:57:06 +03:00
return PTR_ERR ( fid ) ;
2005-09-10 00:04:19 +04:00
2010-09-28 18:29:25 +04:00
if ( ! v9fs_proto_dotu ( v9ses ) )
2007-07-11 02:57:28 +04:00
return - EBADF ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
st = p9_client_stat ( fid ) ;
if ( IS_ERR ( st ) )
return PTR_ERR ( st ) ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
if ( ! ( st - > mode & P9_DMSYMLINK ) ) {
2005-09-10 00:04:19 +04:00
retval = - EINVAL ;
2007-07-11 02:57:28 +04:00
goto done ;
2005-09-10 00:04:19 +04:00
}
/* copy extension buffer into buffer */
2008-10-16 17:30:07 +04:00
strncpy ( buffer , st - > extension , buflen ) ;
2005-09-10 00:04:19 +04:00
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS ,
2008-10-16 17:30:07 +04:00
" %s -> %s (%s) \n " , dentry - > d_name . name , st - > extension , buffer ) ;
2005-09-10 00:04:19 +04:00
2009-11-02 17:39:34 +03:00
retval = strnlen ( buffer , buflen ) ;
2007-07-11 02:57:28 +04:00
done :
2010-08-24 22:13:59 +04:00
p9stat_free ( st ) ;
2007-07-11 02:57:28 +04:00
kfree ( st ) ;
2005-09-10 00:04:19 +04:00
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 ( ) ;
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " %s n " , dentry - > d_name . name ) ;
2005-09-10 00:04:19 +04:00
if ( ! link )
link = ERR_PTR ( - ENOMEM ) ;
else {
2006-03-25 14:07:26 +03:00
len = v9fs_readlink ( dentry , link , PATH_MAX ) ;
2005-09-10 00:04:19 +04:00
if ( len < 0 ) {
2005-11-07 11:59:36 +03:00
__putname ( link ) ;
2005-09-10 00:04:19 +04:00
link = ERR_PTR ( len ) ;
} else
2009-11-02 17:39:34 +03:00
link [ min ( len , PATH_MAX - 1 ) ] = 0 ;
2005-09-10 00:04:19 +04:00
}
nd_set_link ( nd , link ) ;
return NULL ;
}
/**
* v9fs_vfs_put_link - release a symlink path
* @ dentry : dentry for symlink
* @ nd : nameidata
2008-03-05 16:08:09 +03:00
* @ p : unused
2005-09-10 00:04:19 +04:00
*
*/
2011-01-10 22:51:47 +03:00
void
2008-03-05 16:08:09 +03:00
v9fs_vfs_put_link ( struct dentry * dentry , struct nameidata * nd , void * p )
2005-09-10 00:04:19 +04:00
{
char * s = nd_get_link ( nd ) ;
2008-12-20 01:45:21 +03:00
P9_DPRINTK ( P9_DEBUG_VFS , " %s %s \n " , dentry - > d_name . name ,
IS_ERR ( s ) ? " <error> " : s ) ;
2005-09-10 00:04:19 +04:00
if ( ! IS_ERR ( s ) )
2005-11-07 11:59:36 +03:00
__putname ( s ) ;
2005-09-10 00:04:19 +04:00
}
2008-03-05 16:08:09 +03:00
/**
* 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 : 9 p2000 . u format extension string representing special file
*
*/
2006-01-08 12:05:00 +03:00
static int v9fs_vfs_mkspecial ( struct inode * dir , struct dentry * dentry ,
int mode , const char * extension )
2005-09-10 00:04:19 +04:00
{
2007-07-11 02:57:28 +04:00
u32 perm ;
struct p9_fid * fid ;
2011-02-28 14:34:08 +03:00
struct v9fs_session_info * v9ses ;
2005-09-10 00:04:19 +04:00
2006-03-02 13:54:30 +03:00
v9ses = v9fs_inode2v9ses ( dir ) ;
2010-03-05 21:48:00 +03:00
if ( ! v9fs_proto_dotu ( v9ses ) ) {
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_ERROR , " not extended \n " ) ;
2006-03-02 13:54:30 +03:00
return - EPERM ;
2005-09-10 00:04:19 +04:00
}
2007-01-26 11:57:06 +03:00
perm = unixmode2p9mode ( v9ses , mode ) ;
2007-07-11 02:57:28 +04:00
fid = v9fs_create ( v9ses , dir , dentry , ( char * ) extension , perm ,
P9_OREAD ) ;
if ( IS_ERR ( fid ) )
return PTR_ERR ( fid ) ;
2007-01-26 11:57:06 +03:00
2011-02-28 14:34:08 +03:00
v9fs_invalidate_inode_attr ( dir ) ;
2007-07-11 02:57:28 +04:00
p9_client_clunk ( fid ) ;
2006-03-02 13:54:30 +03:00
return 0 ;
2006-01-08 12:05:00 +03:00
}
/**
* v9fs_vfs_symlink - helper function to create symlinks
* @ dir : directory inode containing symlink
* @ dentry : dentry for symlink
* @ symname : symlink data
*
2008-03-05 16:08:09 +03:00
* See Also : 9 P2000 . u RFC for more information
2006-01-08 12:05:00 +03:00
*
*/
static int
v9fs_vfs_symlink ( struct inode * dir , struct dentry * dentry , const char * symname )
{
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS , " %lu,%s,%s \n " , dir - > i_ino ,
dentry - > d_name . name , symname ) ;
2006-01-08 12:05:00 +03:00
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 ;
char * name ;
2011-02-28 14:34:08 +03:00
struct p9_fid * oldfid ;
2006-01-08 12:05:00 +03:00
2007-07-11 02:57:28 +04:00
P9_DPRINTK ( P9_DEBUG_VFS ,
" %lu,%s,%s \n " , dir - > i_ino , dentry - > d_name . name ,
2006-01-08 12:05:00 +03:00
old_dentry - > d_name . name ) ;
2007-01-26 11:57:06 +03:00
oldfid = v9fs_fid_clone ( old_dentry ) ;
2007-10-17 23:31:07 +04:00
if ( IS_ERR ( oldfid ) )
2007-01-26 11:57:06 +03:00
return PTR_ERR ( oldfid ) ;
2006-01-08 12:05:00 +03:00
name = __getname ( ) ;
2007-01-26 11:57:06 +03:00
if ( unlikely ( ! name ) ) {
retval = - ENOMEM ;
goto clunk_fid ;
}
2006-06-25 16:48:31 +04:00
2006-03-25 14:07:26 +03:00
sprintf ( name , " %d \n " , oldfid - > fid ) ;
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retval = v9fs_vfs_mkspecial ( dir , dentry , P9_DMLINK , name ) ;
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__putname ( name ) ;
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if ( ! retval ) {
v9fs_refresh_inode ( oldfid , old_dentry - > d_inode ) ;
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v9fs_invalidate_inode_attr ( dir ) ;
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}
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clunk_fid :
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p9_client_clunk ( oldfid ) ;
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return retval ;
}
/**
* v9fs_vfs_mknod - create a special file
* @ dir : inode destination for new link
* @ dentry : dentry for file
* @ mode : mode for creation
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* @ rdev : device associated with special file
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*
*/
static int
v9fs_vfs_mknod ( struct inode * dir , struct dentry * dentry , int mode , dev_t rdev )
{
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int retval ;
char * name ;
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P9_DPRINTK ( P9_DEBUG_VFS ,
" %lu,%s mode: %x MAJOR: %u MINOR: %u \n " , dir - > i_ino ,
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dentry - > d_name . name , mode , MAJOR ( rdev ) , MINOR ( rdev ) ) ;
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if ( ! new_valid_dev ( rdev ) )
return - EINVAL ;
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name = __getname ( ) ;
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if ( ! name )
return - ENOMEM ;
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/* build extension */
if ( S_ISBLK ( mode ) )
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sprintf ( name , " b %u %u " , MAJOR ( rdev ) , MINOR ( rdev ) ) ;
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else if ( S_ISCHR ( mode ) )
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sprintf ( name , " c %u %u " , MAJOR ( rdev ) , MINOR ( rdev ) ) ;
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else if ( S_ISFIFO ( mode ) )
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* name = 0 ;
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else if ( S_ISSOCK ( mode ) )
* name = 0 ;
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else {
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__putname ( name ) ;
return - EINVAL ;
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}
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retval = v9fs_vfs_mkspecial ( dir , dentry , mode , name ) ;
__putname ( name ) ;
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return retval ;
}
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int v9fs_refresh_inode ( struct p9_fid * fid , struct inode * inode )
{
loff_t i_size ;
struct p9_wstat * st ;
struct v9fs_session_info * v9ses ;
v9ses = v9fs_inode2v9ses ( inode ) ;
st = p9_client_stat ( fid ) ;
if ( IS_ERR ( st ) )
return PTR_ERR ( st ) ;
spin_lock ( & inode - > i_lock ) ;
/*
* We don ' t want to refresh inode - > i_size ,
* because we may have cached data
*/
i_size = inode - > i_size ;
v9fs_stat2inode ( st , inode , inode - > i_sb ) ;
if ( v9ses - > cache )
inode - > i_size = i_size ;
spin_unlock ( & inode - > i_lock ) ;
p9stat_free ( st ) ;
kfree ( st ) ;
return 0 ;
}
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static const struct inode_operations v9fs_dir_inode_operations_dotu = {
. create = v9fs_vfs_create ,
. lookup = v9fs_vfs_lookup ,
. symlink = v9fs_vfs_symlink ,
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. link = v9fs_vfs_link ,
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. unlink = v9fs_vfs_unlink ,
. mkdir = v9fs_vfs_mkdir ,
. rmdir = v9fs_vfs_rmdir ,
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. mknod = v9fs_vfs_mknod ,
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. rename = v9fs_vfs_rename ,
. getattr = v9fs_vfs_getattr ,
. setattr = v9fs_vfs_setattr ,
} ;
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static const struct inode_operations v9fs_dir_inode_operations = {
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. 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 ,
} ;
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static const struct inode_operations v9fs_file_inode_operations = {
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. getattr = v9fs_vfs_getattr ,
. setattr = v9fs_vfs_setattr ,
} ;
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static const struct inode_operations v9fs_symlink_inode_operations = {
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. readlink = generic_readlink ,
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. follow_link = v9fs_vfs_follow_link ,
. put_link = v9fs_vfs_put_link ,
. getattr = v9fs_vfs_getattr ,
. setattr = v9fs_vfs_setattr ,
} ;
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