2005-04-17 06:20:36 +08:00
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/*
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* linux/fs/nfs/inode.c
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*
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* Copyright (C) 1992 Rick Sladkey
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*
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* nfs inode and superblock handling functions
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*
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2008-10-27 23:19:48 +08:00
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* Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
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2005-04-17 06:20:36 +08:00
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* experimental NFS changes. Modularisation taken straight from SYS5 fs.
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*
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* Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
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* J.S.Peatfield@damtp.cam.ac.uk
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*
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*/
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#include <linux/module.h>
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#include <linux/init.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>
2007-05-21 05:22:52 +08:00
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#include <linux/sched.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/time.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/stat.h>
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#include <linux/errno.h>
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#include <linux/unistd.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/stats.h>
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2006-03-21 02:44:22 +08:00
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#include <linux/sunrpc/metrics.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/nfs_fs.h>
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#include <linux/nfs_mount.h>
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#include <linux/nfs4_mount.h>
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#include <linux/lockd/bind.h>
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#include <linux/seq_file.h>
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#include <linux/mount.h>
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#include <linux/nfs_idmap.h>
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#include <linux/vfs.h>
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2006-06-09 21:34:28 +08:00
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#include <linux/inet.h>
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#include <linux/nfs_xdr.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 16:04:11 +08:00
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#include <linux/slab.h>
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2010-12-03 03:31:23 +08:00
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#include <linux/compat.h>
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2011-12-02 05:44:39 +08:00
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#include <linux/freezer.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/system.h>
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#include <asm/uaccess.h>
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2005-06-23 01:16:21 +08:00
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#include "nfs4_fs.h"
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2006-01-03 16:55:41 +08:00
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#include "callback.h"
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2005-04-17 06:20:36 +08:00
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#include "delegation.h"
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2006-03-21 02:44:13 +08:00
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#include "iostat.h"
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NFS: Split fs/nfs/inode.c
As fs/nfs/inode.c is rather large, heterogenous and unwieldy, the attached
patch splits it up into a number of files:
(*) fs/nfs/inode.c
Strictly inode specific functions.
(*) fs/nfs/super.c
Superblock management functions for NFS and NFS4, normal access, clones
and referrals. The NFS4 superblock functions _could_ move out into a
separate conditionally compiled file, but it's probably not worth it as
there're so many common bits.
(*) fs/nfs/namespace.c
Some namespace-specific functions have been moved here.
(*) fs/nfs/nfs4namespace.c
NFS4-specific namespace functions (this could be merged into the previous
file). This file is conditionally compiled.
(*) fs/nfs/internal.h
Inter-file declarations, plus a few simple utility functions moved from
fs/nfs/inode.c.
Additionally, all the in-.c-file externs have been moved here, and those
files they were moved from now includes this file.
For the most part, the functions have not been changed, only some multiplexor
functions have changed significantly.
I've also:
(*) Added some extra banner comments above some functions.
(*) Rearranged the function order within the files to be more logical and
better grouped (IMO), though someone may prefer a different order.
(*) Reduced the number of #ifdefs in .c files.
(*) Added missing __init and __exit directives.
Signed-Off-By: David Howells <dhowells@redhat.com>
2006-06-09 21:34:33 +08:00
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#include "internal.h"
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2009-04-03 23:42:42 +08:00
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#include "fscache.h"
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2009-08-20 06:12:27 +08:00
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#include "dns_resolve.h"
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2010-10-20 12:18:01 +08:00
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#include "pnfs.h"
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2011-11-25 22:13:04 +08:00
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#include "netns.h"
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2005-04-17 06:20:36 +08:00
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#define NFSDBG_FACILITY NFSDBG_VFS
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2007-10-10 00:01:04 +08:00
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#define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
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/* Default is to see 64-bit inode numbers */
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2012-01-13 07:02:20 +08:00
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static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
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2007-10-10 00:01:04 +08:00
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2005-04-17 06:20:36 +08:00
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static void nfs_invalidate_inode(struct inode *);
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2005-12-04 04:20:07 +08:00
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static int nfs_update_inode(struct inode *, struct nfs_fattr *);
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2005-04-17 06:20:36 +08:00
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2006-12-07 12:33:20 +08:00
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static struct kmem_cache * nfs_inode_cachep;
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2005-06-23 01:16:27 +08:00
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2005-04-17 06:20:36 +08:00
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static inline unsigned long
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nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
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{
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return nfs_fileid_to_ino_t(fattr->fileid);
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}
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2009-03-12 02:10:30 +08:00
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/**
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* nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
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* @word: long word containing the bit lock
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*/
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int nfs_wait_bit_killable(void *word)
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{
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if (fatal_signal_pending(current))
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return -ERESTARTSYS;
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2011-12-02 05:44:39 +08:00
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freezable_schedule();
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2009-03-12 02:10:30 +08:00
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return 0;
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}
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2007-10-10 00:01:04 +08:00
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/**
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* nfs_compat_user_ino64 - returns the user-visible inode number
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* @fileid: 64-bit fileid
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*
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* This function returns a 32-bit inode number if the boot parameter
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* nfs.enable_ino64 is zero.
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*/
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u64 nfs_compat_user_ino64(u64 fileid)
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{
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2010-12-03 03:31:23 +08:00
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#ifdef CONFIG_COMPAT
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compat_ulong_t ino;
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#else
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unsigned long ino;
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#endif
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2007-10-10 00:01:04 +08:00
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if (enable_ino64)
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return fileid;
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ino = fileid;
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if (sizeof(ino) < sizeof(fileid))
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ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
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return ino;
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}
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2010-06-08 02:34:48 +08:00
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static void nfs_clear_inode(struct inode *inode)
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2005-04-17 06:20:36 +08:00
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{
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2006-06-02 05:26:35 +08:00
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/*
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* The following should never happen...
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*/
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BUG_ON(nfs_have_writebacks(inode));
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2006-07-25 23:28:18 +08:00
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BUG_ON(!list_empty(&NFS_I(inode)->open_files));
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2005-06-23 01:16:22 +08:00
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nfs_zap_acl_cache(inode);
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2006-07-25 23:28:18 +08:00
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nfs_access_zap_cache(inode);
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2009-04-03 23:42:43 +08:00
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nfs_fscache_release_inode_cookie(inode);
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2005-04-17 06:20:36 +08:00
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}
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2010-06-08 02:34:48 +08:00
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void nfs_evict_inode(struct inode *inode)
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{
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truncate_inode_pages(&inode->i_data, 0);
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end_writeback(inode);
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nfs_clear_inode(inode);
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}
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2005-12-14 05:13:54 +08:00
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/**
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* nfs_sync_mapping - helper to flush all mmapped dirty data to disk
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*/
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int nfs_sync_mapping(struct address_space *mapping)
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{
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2010-02-20 09:03:29 +08:00
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int ret = 0;
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2005-12-14 05:13:54 +08:00
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2010-02-20 09:03:29 +08:00
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if (mapping->nrpages != 0) {
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unmap_mapping_range(mapping, 0, 0, 0);
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ret = nfs_wb_all(mapping->host);
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}
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2005-12-14 05:13:54 +08:00
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return ret;
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}
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2005-04-17 06:20:36 +08:00
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/*
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* Invalidate the local caches
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*/
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2005-11-26 06:10:06 +08:00
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static void nfs_zap_caches_locked(struct inode *inode)
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2005-04-17 06:20:36 +08:00
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{
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struct nfs_inode *nfsi = NFS_I(inode);
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int mode = inode->i_mode;
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2006-03-21 02:44:14 +08:00
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nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
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2007-09-29 07:22:40 +08:00
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nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
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nfsi->attrtimeo_timestamp = jiffies;
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2005-04-17 06:20:36 +08:00
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memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
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if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
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2005-08-19 02:24:09 +08:00
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nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
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2005-04-17 06:20:36 +08:00
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else
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2005-08-19 02:24:09 +08:00
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nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
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2005-11-26 06:10:06 +08:00
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}
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2005-08-19 02:24:12 +08:00
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2005-11-26 06:10:06 +08:00
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void nfs_zap_caches(struct inode *inode)
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{
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spin_lock(&inode->i_lock);
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nfs_zap_caches_locked(inode);
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2005-08-19 02:24:12 +08:00
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spin_unlock(&inode->i_lock);
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2005-06-23 01:16:22 +08:00
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}
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2006-10-20 14:28:40 +08:00
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void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
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{
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if (mapping->nrpages != 0) {
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spin_lock(&inode->i_lock);
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NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
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spin_unlock(&inode->i_lock);
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}
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}
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|
2008-06-12 05:39:04 +08:00
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void nfs_zap_acl_cache(struct inode *inode)
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2005-06-23 01:16:22 +08:00
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{
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void (*clear_acl_cache)(struct inode *);
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clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
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if (clear_acl_cache != NULL)
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clear_acl_cache(inode);
|
2005-08-19 02:24:12 +08:00
|
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spin_lock(&inode->i_lock);
|
2005-08-19 02:24:09 +08:00
|
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|
NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
|
2005-08-19 02:24:12 +08:00
|
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spin_unlock(&inode->i_lock);
|
2005-04-17 06:20:36 +08:00
|
|
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}
|
|
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|
|
2007-09-29 05:11:45 +08:00
|
|
|
void nfs_invalidate_atime(struct inode *inode)
|
|
|
|
{
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|
|
|
spin_lock(&inode->i_lock);
|
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|
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
|
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spin_unlock(&inode->i_lock);
|
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}
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|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
2005-11-26 06:10:06 +08:00
|
|
|
* Invalidate, but do not unhash, the inode.
|
|
|
|
* NB: must be called with inode->i_lock held!
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
2005-11-26 06:10:06 +08:00
|
|
|
static void nfs_invalidate_inode(struct inode *inode)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-01-23 14:58:59 +08:00
|
|
|
set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
|
2005-11-26 06:10:06 +08:00
|
|
|
nfs_zap_caches_locked(inode);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
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|
|
struct nfs_find_desc {
|
|
|
|
struct nfs_fh *fh;
|
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|
|
struct nfs_fattr *fattr;
|
|
|
|
};
|
|
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|
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|
|
|
/*
|
|
|
|
* In NFSv3 we can have 64bit inode numbers. In order to support
|
|
|
|
* this, and re-exported directories (also seen in NFSv2)
|
|
|
|
* we are forced to allow 2 different inodes to have the same
|
|
|
|
* i_ino.
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
nfs_find_actor(struct inode *inode, void *opaque)
|
|
|
|
{
|
|
|
|
struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
|
|
|
|
struct nfs_fh *fh = desc->fh;
|
|
|
|
struct nfs_fattr *fattr = desc->fattr;
|
|
|
|
|
|
|
|
if (NFS_FILEID(inode) != fattr->fileid)
|
|
|
|
return 0;
|
|
|
|
if (nfs_compare_fh(NFS_FH(inode), fh))
|
|
|
|
return 0;
|
|
|
|
if (is_bad_inode(inode) || NFS_STALE(inode))
|
|
|
|
return 0;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
nfs_init_locked(struct inode *inode, void *opaque)
|
|
|
|
{
|
|
|
|
struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
|
|
|
|
struct nfs_fattr *fattr = desc->fattr;
|
|
|
|
|
2008-01-23 14:59:08 +08:00
|
|
|
set_nfs_fileid(inode, fattr->fileid);
|
2005-04-17 06:20:36 +08:00
|
|
|
nfs_copy_fh(NFS_FH(inode), desc->fh);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is our front-end to iget that looks up inodes by file handle
|
|
|
|
* instead of inode number.
|
|
|
|
*/
|
|
|
|
struct inode *
|
|
|
|
nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
|
|
|
|
{
|
|
|
|
struct nfs_find_desc desc = {
|
|
|
|
.fh = fh,
|
|
|
|
.fattr = fattr
|
|
|
|
};
|
2006-03-21 02:44:48 +08:00
|
|
|
struct inode *inode = ERR_PTR(-ENOENT);
|
2005-04-17 06:20:36 +08:00
|
|
|
unsigned long hash;
|
|
|
|
|
2011-03-25 01:12:30 +08:00
|
|
|
nfs_attr_check_mountpoint(sb, fattr);
|
|
|
|
|
2011-06-14 06:25:56 +08:00
|
|
|
if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) &&
|
|
|
|
!nfs_attr_use_mounted_on_fileid(fattr))
|
2005-04-17 06:20:36 +08:00
|
|
|
goto out_no_inode;
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
|
2005-04-17 06:20:36 +08:00
|
|
|
goto out_no_inode;
|
|
|
|
|
|
|
|
hash = nfs_fattr_to_ino_t(fattr);
|
|
|
|
|
2006-03-21 02:44:48 +08:00
|
|
|
inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
|
|
|
|
if (inode == NULL) {
|
|
|
|
inode = ERR_PTR(-ENOMEM);
|
2005-04-17 06:20:36 +08:00
|
|
|
goto out_no_inode;
|
2006-03-21 02:44:48 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
if (inode->i_state & I_NEW) {
|
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
2007-02-06 06:44:22 +08:00
|
|
|
unsigned long now = jiffies;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* We set i_ino for the few things that still rely on it,
|
|
|
|
* such as stat(2) */
|
|
|
|
inode->i_ino = hash;
|
|
|
|
|
|
|
|
/* We can't support update_atime(), since the server will reset it */
|
|
|
|
inode->i_flags |= S_NOATIME|S_NOCMTIME;
|
|
|
|
inode->i_mode = fattr->mode;
|
2009-08-10 03:06:19 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
|
|
|
|
&& nfs_server_capable(inode, NFS_CAP_MODE))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_ACCESS
|
|
|
|
| NFS_INO_INVALID_ACL;
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Why so? Because we want revalidate for devices/FIFOs, and
|
|
|
|
* that's precisely what we have in nfs_file_inode_operations.
|
|
|
|
*/
|
2006-08-23 08:06:12 +08:00
|
|
|
inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
|
2005-04-17 06:20:36 +08:00
|
|
|
if (S_ISREG(inode->i_mode)) {
|
nfs: when attempting to open a directory, fall back on normal lookup (try #5)
commit d953126 changed how nfs_atomic_lookup handles an -EISDIR return
from an OPEN call. Prior to that patch, that caused the client to fall
back to doing a normal lookup. When that patch went in, the code began
returning that error to userspace. The d_revalidate codepath however
never had the corresponding change, so it was still possible to end up
with a NULL ctx->state pointer after that.
That patch caused a regression. When we attempt to open a directory that
does not have a cached dentry, that open now errors out with EISDIR. If
you attempt the same open with a cached dentry, it will succeed.
Fix this by reverting the change in nfs_atomic_lookup and allowing
attempts to open directories to fall back to a normal lookup
Also, add a NFSv4-specific f_ops->open routine that just returns
-ENOTDIR. This should never be called if things are working properly,
but if it ever is, then the dprintk may help in debugging.
To facilitate this, a new file_operations field is also added to the
nfs_rpc_ops struct.
Cc: stable@kernel.org
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-11-05 01:31:21 +08:00
|
|
|
inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
|
2005-04-17 06:20:36 +08:00
|
|
|
inode->i_data.a_ops = &nfs_file_aops;
|
|
|
|
inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
|
|
|
|
} else if (S_ISDIR(inode->i_mode)) {
|
2006-08-23 08:06:12 +08:00
|
|
|
inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
|
2005-04-17 06:20:36 +08:00
|
|
|
inode->i_fop = &nfs_dir_operations;
|
2010-12-02 03:17:06 +08:00
|
|
|
inode->i_data.a_ops = &nfs_dir_aops;
|
2010-09-25 06:50:01 +08:00
|
|
|
if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS))
|
2008-01-23 14:58:59 +08:00
|
|
|
set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
|
2006-06-09 21:34:19 +08:00
|
|
|
/* Deal with crossing mountpoints */
|
2011-03-25 01:12:30 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
|
|
|
|
fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
|
2006-06-09 21:34:29 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
|
|
|
|
inode->i_op = &nfs_referral_inode_operations;
|
|
|
|
else
|
|
|
|
inode->i_op = &nfs_mountpoint_inode_operations;
|
2006-06-09 21:34:19 +08:00
|
|
|
inode->i_fop = NULL;
|
2011-01-15 02:45:42 +08:00
|
|
|
inode->i_flags |= S_AUTOMOUNT;
|
2006-06-09 21:34:19 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
} else if (S_ISLNK(inode->i_mode))
|
|
|
|
inode->i_op = &nfs_symlink_inode_operations;
|
|
|
|
else
|
|
|
|
init_special_inode(inode, inode->i_mode, fattr->rdev);
|
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
memset(&inode->i_atime, 0, sizeof(inode->i_atime));
|
|
|
|
memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
|
|
|
|
memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
|
2011-10-18 07:08:46 +08:00
|
|
|
inode->i_version = 0;
|
2009-03-12 02:10:24 +08:00
|
|
|
inode->i_size = 0;
|
2011-10-28 20:13:28 +08:00
|
|
|
clear_nlink(inode);
|
2009-03-12 02:10:24 +08:00
|
|
|
inode->i_uid = -2;
|
|
|
|
inode->i_gid = -2;
|
|
|
|
inode->i_blocks = 0;
|
|
|
|
memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
|
|
|
|
|
2005-10-28 10:12:39 +08:00
|
|
|
nfsi->read_cache_jiffies = fattr->time_start;
|
2008-10-15 07:16:07 +08:00
|
|
|
nfsi->attr_gencount = fattr->gencount;
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_ATIME)
|
|
|
|
inode->i_atime = fattr->atime;
|
2009-08-10 03:06:19 +08:00
|
|
|
else if (nfs_server_capable(inode, NFS_CAP_ATIME))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_MTIME)
|
|
|
|
inode->i_mtime = fattr->mtime;
|
2009-08-10 03:06:19 +08:00
|
|
|
else if (nfs_server_capable(inode, NFS_CAP_MTIME))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_DATA;
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_CTIME)
|
|
|
|
inode->i_ctime = fattr->ctime;
|
2009-08-10 03:06:19 +08:00
|
|
|
else if (nfs_server_capable(inode, NFS_CAP_CTIME))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_ACCESS
|
|
|
|
| NFS_INO_INVALID_ACL;
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
|
2011-10-18 07:08:46 +08:00
|
|
|
inode->i_version = fattr->change_attr;
|
2009-08-10 03:06:19 +08:00
|
|
|
else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_DATA;
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_SIZE)
|
|
|
|
inode->i_size = nfs_size_to_loff_t(fattr->size);
|
2009-08-10 03:06:19 +08:00
|
|
|
else
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_DATA
|
|
|
|
| NFS_INO_REVAL_PAGECACHE;
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_NLINK)
|
2011-10-28 20:13:29 +08:00
|
|
|
set_nlink(inode, fattr->nlink);
|
2009-08-10 03:06:19 +08:00
|
|
|
else if (nfs_server_capable(inode, NFS_CAP_NLINK))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_OWNER)
|
|
|
|
inode->i_uid = fattr->uid;
|
2009-08-10 03:06:19 +08:00
|
|
|
else if (nfs_server_capable(inode, NFS_CAP_OWNER))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_ACCESS
|
|
|
|
| NFS_INO_INVALID_ACL;
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_GROUP)
|
|
|
|
inode->i_gid = fattr->gid;
|
2009-08-10 03:06:19 +08:00
|
|
|
else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_ACCESS
|
|
|
|
| NFS_INO_INVALID_ACL;
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
|
|
|
|
inode->i_blocks = fattr->du.nfs2.blocks;
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* report the blocks in 512byte units
|
|
|
|
*/
|
|
|
|
inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
|
|
|
|
}
|
|
|
|
nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
|
2007-02-06 06:44:22 +08:00
|
|
|
nfsi->attrtimeo_timestamp = now;
|
2006-07-25 23:28:18 +08:00
|
|
|
nfsi->access_cache = RB_ROOT;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-04-03 23:42:43 +08:00
|
|
|
nfs_fscache_init_inode_cookie(inode);
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
unlock_new_inode(inode);
|
|
|
|
} else
|
|
|
|
nfs_refresh_inode(inode, fattr);
|
|
|
|
dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
|
|
|
|
inode->i_sb->s_id,
|
|
|
|
(long long)NFS_FILEID(inode),
|
|
|
|
atomic_read(&inode->i_count));
|
|
|
|
|
|
|
|
out:
|
|
|
|
return inode;
|
|
|
|
|
|
|
|
out_no_inode:
|
2006-03-21 02:44:48 +08:00
|
|
|
dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
|
2005-04-17 06:20:36 +08:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2012-01-18 11:04:26 +08:00
|
|
|
#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN)
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
int
|
|
|
|
nfs_setattr(struct dentry *dentry, struct iattr *attr)
|
|
|
|
{
|
|
|
|
struct inode *inode = dentry->d_inode;
|
2010-04-17 04:22:52 +08:00
|
|
|
struct nfs_fattr *fattr;
|
|
|
|
int error = -ENOMEM;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-03-21 02:44:14 +08:00
|
|
|
nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
|
|
|
|
|
2007-10-18 18:05:21 +08:00
|
|
|
/* skip mode change if it's just for clearing setuid/setgid */
|
|
|
|
if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
|
|
|
|
attr->ia_valid &= ~ATTR_MODE;
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
if (attr->ia_valid & ATTR_SIZE) {
|
|
|
|
if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
|
|
|
|
attr->ia_valid &= ~ATTR_SIZE;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Optimization: if the end result is no change, don't RPC */
|
|
|
|
attr->ia_valid &= NFS_VALID_ATTRS;
|
2012-01-18 11:04:26 +08:00
|
|
|
if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
|
2006-03-21 02:44:06 +08:00
|
|
|
/* Write all dirty data */
|
2010-08-01 02:29:06 +08:00
|
|
|
if (S_ISREG(inode->i_mode))
|
2007-04-15 07:07:28 +08:00
|
|
|
nfs_wb_all(inode);
|
2010-04-17 04:22:52 +08:00
|
|
|
|
|
|
|
fattr = nfs_alloc_fattr();
|
|
|
|
if (fattr == NULL)
|
|
|
|
goto out;
|
2005-10-19 05:20:19 +08:00
|
|
|
/*
|
|
|
|
* Return any delegations if we're going to change ACLs
|
|
|
|
*/
|
|
|
|
if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
|
|
|
|
nfs_inode_return_delegation(inode);
|
2010-04-17 04:22:52 +08:00
|
|
|
error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
|
2005-08-16 23:49:44 +08:00
|
|
|
if (error == 0)
|
2010-04-17 04:22:52 +08:00
|
|
|
nfs_refresh_inode(inode, fattr);
|
|
|
|
nfs_free_fattr(fattr);
|
|
|
|
out:
|
2005-08-16 23:49:44 +08:00
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
2008-06-12 00:21:19 +08:00
|
|
|
/**
|
|
|
|
* nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
|
|
|
|
* @inode: inode of the file used
|
|
|
|
* @offset: file offset to start truncating
|
|
|
|
*
|
|
|
|
* This is a copy of the common vmtruncate, but with the locking
|
|
|
|
* corrected to take into account the fact that NFS requires
|
|
|
|
* inode->i_size to be updated under the inode->i_lock.
|
|
|
|
*/
|
|
|
|
static int nfs_vmtruncate(struct inode * inode, loff_t offset)
|
|
|
|
{
|
2009-08-21 00:35:06 +08:00
|
|
|
loff_t oldsize;
|
|
|
|
int err;
|
2008-06-12 00:21:19 +08:00
|
|
|
|
2009-08-21 00:35:06 +08:00
|
|
|
err = inode_newsize_ok(inode, offset);
|
|
|
|
if (err)
|
|
|
|
goto out;
|
2008-06-12 00:21:19 +08:00
|
|
|
|
2009-08-21 00:35:06 +08:00
|
|
|
spin_lock(&inode->i_lock);
|
|
|
|
oldsize = inode->i_size;
|
|
|
|
i_size_write(inode, offset);
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
|
|
|
|
truncate_pagecache(inode, oldsize, offset);
|
|
|
|
out:
|
|
|
|
return err;
|
2008-06-12 00:21:19 +08:00
|
|
|
}
|
|
|
|
|
2005-08-16 23:49:44 +08:00
|
|
|
/**
|
|
|
|
* nfs_setattr_update_inode - Update inode metadata after a setattr call.
|
|
|
|
* @inode: pointer to struct inode
|
|
|
|
* @attr: pointer to struct iattr
|
|
|
|
*
|
|
|
|
* Note: we do this in the *proc.c in order to ensure that
|
|
|
|
* it works for things like exclusive creates too.
|
|
|
|
*/
|
|
|
|
void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
|
|
|
|
{
|
|
|
|
if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
|
2008-10-06 02:26:11 +08:00
|
|
|
spin_lock(&inode->i_lock);
|
2005-04-17 06:20:36 +08:00
|
|
|
if ((attr->ia_valid & ATTR_MODE) != 0) {
|
2005-08-16 23:49:44 +08:00
|
|
|
int mode = attr->ia_mode & S_IALLUGO;
|
|
|
|
mode |= inode->i_mode & ~S_IALLUGO;
|
2005-04-17 06:20:36 +08:00
|
|
|
inode->i_mode = mode;
|
|
|
|
}
|
|
|
|
if ((attr->ia_valid & ATTR_UID) != 0)
|
|
|
|
inode->i_uid = attr->ia_uid;
|
|
|
|
if ((attr->ia_valid & ATTR_GID) != 0)
|
|
|
|
inode->i_gid = attr->ia_gid;
|
2005-08-19 02:24:09 +08:00
|
|
|
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
|
2005-08-19 02:24:12 +08:00
|
|
|
spin_unlock(&inode->i_lock);
|
2005-08-16 23:49:44 +08:00
|
|
|
}
|
|
|
|
if ((attr->ia_valid & ATTR_SIZE) != 0) {
|
2006-03-21 02:44:14 +08:00
|
|
|
nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
|
2008-06-12 00:21:19 +08:00
|
|
|
nfs_vmtruncate(inode, attr->ia_size);
|
2005-08-16 23:49:44 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
|
|
|
|
{
|
|
|
|
struct inode *inode = dentry->d_inode;
|
2005-08-19 02:24:09 +08:00
|
|
|
int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
|
2005-04-17 06:20:36 +08:00
|
|
|
int err;
|
|
|
|
|
2010-02-20 09:03:26 +08:00
|
|
|
/* Flush out writes to the server in order to update c/mtime. */
|
2007-10-27 01:32:13 +08:00
|
|
|
if (S_ISREG(inode->i_mode)) {
|
2010-02-20 09:03:26 +08:00
|
|
|
err = filemap_write_and_wait(inode->i_mapping);
|
|
|
|
if (err)
|
|
|
|
goto out;
|
2007-10-27 01:32:13 +08:00
|
|
|
}
|
2006-01-10 12:52:17 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* We may force a getattr if the user cares about atime.
|
|
|
|
*
|
|
|
|
* Note that we only have to check the vfsmount flags here:
|
|
|
|
* - NFS always sets S_NOATIME by so checking it would give a
|
|
|
|
* bogus result
|
|
|
|
* - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
|
|
|
|
* no point in checking those.
|
|
|
|
*/
|
|
|
|
if ((mnt->mnt_flags & MNT_NOATIME) ||
|
|
|
|
((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
|
2005-04-17 06:20:36 +08:00
|
|
|
need_atime = 0;
|
2006-01-10 12:52:17 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
if (need_atime)
|
|
|
|
err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
|
|
|
|
else
|
|
|
|
err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
|
2007-08-04 03:07:10 +08:00
|
|
|
if (!err) {
|
2005-04-17 06:20:36 +08:00
|
|
|
generic_fillattr(inode, stat);
|
2007-10-10 00:01:04 +08:00
|
|
|
stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
|
2007-08-04 03:07:10 +08:00
|
|
|
}
|
2010-02-20 09:03:26 +08:00
|
|
|
out:
|
2005-04-17 06:20:36 +08:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2010-06-26 04:35:53 +08:00
|
|
|
static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
|
|
|
|
{
|
|
|
|
atomic_set(&l_ctx->count, 1);
|
|
|
|
l_ctx->lockowner = current->files;
|
|
|
|
l_ctx->pid = current->tgid;
|
|
|
|
INIT_LIST_HEAD(&l_ctx->list);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
|
|
|
|
{
|
|
|
|
struct nfs_lock_context *pos;
|
|
|
|
|
|
|
|
list_for_each_entry(pos, &ctx->lock_context.list, list) {
|
|
|
|
if (pos->lockowner != current->files)
|
|
|
|
continue;
|
|
|
|
if (pos->pid != current->tgid)
|
|
|
|
continue;
|
|
|
|
atomic_inc(&pos->count);
|
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
|
|
|
|
{
|
|
|
|
struct nfs_lock_context *res, *new = NULL;
|
2011-06-23 06:40:12 +08:00
|
|
|
struct inode *inode = ctx->dentry->d_inode;
|
2010-06-26 04:35:53 +08:00
|
|
|
|
|
|
|
spin_lock(&inode->i_lock);
|
|
|
|
res = __nfs_find_lock_context(ctx);
|
|
|
|
if (res == NULL) {
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
new = kmalloc(sizeof(*new), GFP_KERNEL);
|
|
|
|
if (new == NULL)
|
|
|
|
return NULL;
|
|
|
|
nfs_init_lock_context(new);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
|
|
res = __nfs_find_lock_context(ctx);
|
|
|
|
if (res == NULL) {
|
|
|
|
list_add_tail(&new->list, &ctx->lock_context.list);
|
|
|
|
new->open_context = ctx;
|
|
|
|
res = new;
|
|
|
|
new = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
kfree(new);
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
|
|
|
|
{
|
|
|
|
struct nfs_open_context *ctx = l_ctx->open_context;
|
2011-06-23 06:40:12 +08:00
|
|
|
struct inode *inode = ctx->dentry->d_inode;
|
2010-06-26 04:35:53 +08:00
|
|
|
|
|
|
|
if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
|
|
|
|
return;
|
|
|
|
list_del(&l_ctx->list);
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
kfree(l_ctx);
|
|
|
|
}
|
|
|
|
|
2009-03-20 03:35:50 +08:00
|
|
|
/**
|
|
|
|
* nfs_close_context - Common close_context() routine NFSv2/v3
|
|
|
|
* @ctx: pointer to context
|
|
|
|
* @is_sync: is this a synchronous close
|
|
|
|
*
|
|
|
|
* always ensure that the attributes are up to date if we're mounted
|
|
|
|
* with close-to-open semantics
|
|
|
|
*/
|
|
|
|
void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
|
|
|
|
{
|
|
|
|
struct inode *inode;
|
|
|
|
struct nfs_server *server;
|
|
|
|
|
|
|
|
if (!(ctx->mode & FMODE_WRITE))
|
|
|
|
return;
|
|
|
|
if (!is_sync)
|
|
|
|
return;
|
2011-06-23 06:40:12 +08:00
|
|
|
inode = ctx->dentry->d_inode;
|
2009-03-20 03:35:50 +08:00
|
|
|
if (!list_empty(&NFS_I(inode)->open_files))
|
|
|
|
return;
|
|
|
|
server = NFS_SERVER(inode);
|
|
|
|
if (server->flags & NFS_MOUNT_NOCTO)
|
|
|
|
return;
|
|
|
|
nfs_revalidate_inode(server, inode);
|
|
|
|
}
|
|
|
|
|
2011-10-24 06:49:54 +08:00
|
|
|
struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct nfs_open_context *ctx;
|
2011-10-24 06:49:54 +08:00
|
|
|
struct rpc_cred *cred = rpc_lookup_cred();
|
|
|
|
if (IS_ERR(cred))
|
|
|
|
return ERR_CAST(cred);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-09-27 16:49:39 +08:00
|
|
|
ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
|
2011-10-24 06:49:54 +08:00
|
|
|
if (!ctx) {
|
|
|
|
put_rpccred(cred);
|
|
|
|
return ERR_PTR(-ENOMEM);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2011-10-24 06:49:54 +08:00
|
|
|
nfs_sb_active(dentry->d_sb);
|
|
|
|
ctx->dentry = dget(dentry);
|
|
|
|
ctx->cred = cred;
|
|
|
|
ctx->state = NULL;
|
|
|
|
ctx->mode = f_mode;
|
|
|
|
ctx->flags = 0;
|
|
|
|
ctx->error = 0;
|
|
|
|
nfs_init_lock_context(&ctx->lock_context);
|
|
|
|
ctx->lock_context.open_context = ctx;
|
|
|
|
INIT_LIST_HEAD(&ctx->list);
|
2005-04-17 06:20:36 +08:00
|
|
|
return ctx;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
|
|
|
|
{
|
|
|
|
if (ctx != NULL)
|
2010-06-26 04:35:53 +08:00
|
|
|
atomic_inc(&ctx->lock_context.count);
|
2005-04-17 06:20:36 +08:00
|
|
|
return ctx;
|
|
|
|
}
|
|
|
|
|
2009-03-20 03:35:50 +08:00
|
|
|
static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2011-06-23 06:40:12 +08:00
|
|
|
struct inode *inode = ctx->dentry->d_inode;
|
|
|
|
struct super_block *sb = ctx->dentry->d_sb;
|
2007-06-18 04:02:44 +08:00
|
|
|
|
2010-09-28 03:51:20 +08:00
|
|
|
if (!list_empty(&ctx->list)) {
|
2010-09-24 00:22:09 +08:00
|
|
|
if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
|
|
|
|
return;
|
|
|
|
list_del(&ctx->list);
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
} else if (!atomic_dec_and_test(&ctx->lock_context.count))
|
2007-07-27 00:06:17 +08:00
|
|
|
return;
|
2010-09-28 03:51:20 +08:00
|
|
|
if (inode != NULL)
|
|
|
|
NFS_PROTO(inode)->close_context(ctx, is_sync);
|
2007-06-18 04:02:44 +08:00
|
|
|
if (ctx->cred != NULL)
|
|
|
|
put_rpccred(ctx->cred);
|
2011-06-23 06:40:12 +08:00
|
|
|
dput(ctx->dentry);
|
|
|
|
nfs_sb_deactive(sb);
|
2007-06-18 04:02:44 +08:00
|
|
|
kfree(ctx);
|
|
|
|
}
|
|
|
|
|
2007-10-19 06:03:27 +08:00
|
|
|
void put_nfs_open_context(struct nfs_open_context *ctx)
|
|
|
|
{
|
|
|
|
__put_nfs_open_context(ctx, 0);
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* Ensure that mmap has a recent RPC credential for use when writing out
|
|
|
|
* shared pages
|
|
|
|
*/
|
2010-09-17 22:56:50 +08:00
|
|
|
void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2006-12-08 18:36:40 +08:00
|
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
2005-04-17 06:20:36 +08:00
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
|
|
|
|
filp->private_data = get_nfs_open_context(ctx);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
|
|
list_add(&ctx->list, &nfsi->open_files);
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
}
|
|
|
|
|
2005-11-05 04:33:38 +08:00
|
|
|
/*
|
|
|
|
* Given an inode, search for an open context with the desired characteristics
|
|
|
|
*/
|
2008-12-24 04:21:56 +08:00
|
|
|
struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
struct nfs_open_context *pos, *ctx = NULL;
|
|
|
|
|
|
|
|
spin_lock(&inode->i_lock);
|
|
|
|
list_for_each_entry(pos, &nfsi->open_files, list) {
|
2005-11-05 04:33:38 +08:00
|
|
|
if (cred != NULL && pos->cred != cred)
|
|
|
|
continue;
|
2010-03-26 01:54:49 +08:00
|
|
|
if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
|
|
|
|
continue;
|
|
|
|
ctx = get_nfs_open_context(pos);
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
return ctx;
|
|
|
|
}
|
|
|
|
|
2006-03-21 02:44:03 +08:00
|
|
|
static void nfs_file_clear_open_context(struct file *filp)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2006-12-08 18:36:40 +08:00
|
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
2007-08-11 05:44:32 +08:00
|
|
|
struct nfs_open_context *ctx = nfs_file_open_context(filp);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
if (ctx) {
|
|
|
|
filp->private_data = NULL;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
|
|
list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
|
|
|
|
spin_unlock(&inode->i_lock);
|
2010-02-02 03:17:50 +08:00
|
|
|
__put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* These allocate and release file read/write context information.
|
|
|
|
*/
|
|
|
|
int nfs_open(struct inode *inode, struct file *filp)
|
|
|
|
{
|
|
|
|
struct nfs_open_context *ctx;
|
|
|
|
|
2011-10-24 06:49:54 +08:00
|
|
|
ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode);
|
|
|
|
if (IS_ERR(ctx))
|
|
|
|
return PTR_ERR(ctx);
|
2005-04-17 06:20:36 +08:00
|
|
|
nfs_file_set_open_context(filp, ctx);
|
|
|
|
put_nfs_open_context(ctx);
|
2009-04-03 23:42:43 +08:00
|
|
|
nfs_fscache_set_inode_cookie(inode, filp);
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int nfs_release(struct inode *inode, struct file *filp)
|
|
|
|
{
|
|
|
|
nfs_file_clear_open_context(filp);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This function is called whenever some part of NFS notices that
|
|
|
|
* the cached attributes have to be refreshed.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
|
|
|
|
{
|
|
|
|
int status = -ESTALE;
|
2010-04-17 04:22:49 +08:00
|
|
|
struct nfs_fattr *fattr = NULL;
|
2005-04-17 06:20:36 +08:00
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
|
|
|
|
dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
|
|
|
|
inode->i_sb->s_id, (long long)NFS_FILEID(inode));
|
|
|
|
|
2006-10-20 14:28:42 +08:00
|
|
|
if (is_bad_inode(inode))
|
2008-10-06 02:48:22 +08:00
|
|
|
goto out;
|
2005-04-17 06:20:36 +08:00
|
|
|
if (NFS_STALE(inode))
|
2005-08-19 02:24:11 +08:00
|
|
|
goto out;
|
2007-09-29 07:11:33 +08:00
|
|
|
|
2010-04-17 04:22:49 +08:00
|
|
|
status = -ENOMEM;
|
|
|
|
fattr = nfs_alloc_fattr();
|
|
|
|
if (fattr == NULL)
|
|
|
|
goto out;
|
|
|
|
|
2008-10-06 02:48:22 +08:00
|
|
|
nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
|
2010-04-17 04:22:49 +08:00
|
|
|
status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (status != 0) {
|
|
|
|
dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
|
|
|
|
inode->i_sb->s_id,
|
|
|
|
(long long)NFS_FILEID(inode), status);
|
|
|
|
if (status == -ESTALE) {
|
|
|
|
nfs_zap_caches(inode);
|
|
|
|
if (!S_ISDIR(inode->i_mode))
|
2008-01-23 14:58:59 +08:00
|
|
|
set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2010-04-17 04:22:49 +08:00
|
|
|
status = nfs_refresh_inode(inode, fattr);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (status) {
|
|
|
|
dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
|
|
|
|
inode->i_sb->s_id,
|
|
|
|
(long long)NFS_FILEID(inode), status);
|
|
|
|
goto out;
|
|
|
|
}
|
2005-08-19 02:24:09 +08:00
|
|
|
|
2005-12-04 04:20:07 +08:00
|
|
|
if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
|
2005-06-23 01:16:22 +08:00
|
|
|
nfs_zap_acl_cache(inode);
|
2005-08-19 02:24:09 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
|
|
|
|
inode->i_sb->s_id,
|
|
|
|
(long long)NFS_FILEID(inode));
|
|
|
|
|
2005-08-19 02:24:11 +08:00
|
|
|
out:
|
2010-04-17 04:22:49 +08:00
|
|
|
nfs_free_fattr(fattr);
|
2005-04-17 06:20:36 +08:00
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
int nfs_attribute_timeout(struct inode *inode)
|
|
|
|
{
|
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
|
2010-04-17 04:42:46 +08:00
|
|
|
return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int nfs_attribute_cache_expired(struct inode *inode)
|
|
|
|
{
|
2010-03-11 04:21:44 +08:00
|
|
|
if (nfs_have_delegated_attributes(inode))
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
2010-04-17 04:42:46 +08:00
|
|
|
return nfs_attribute_timeout(inode);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nfs_revalidate_inode - Revalidate the inode attributes
|
|
|
|
* @server - pointer to nfs_server struct
|
|
|
|
* @inode - pointer to inode struct
|
|
|
|
*
|
|
|
|
* Updates inode attribute information by retrieving the data from the server.
|
|
|
|
*/
|
|
|
|
int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
|
|
|
|
{
|
2006-05-25 13:40:59 +08:00
|
|
|
if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
|
2010-04-17 04:42:46 +08:00
|
|
|
&& !nfs_attribute_cache_expired(inode))
|
2005-04-17 06:20:36 +08:00
|
|
|
return NFS_STALE(inode) ? -ESTALE : 0;
|
|
|
|
return __nfs_revalidate_inode(server, inode);
|
|
|
|
}
|
|
|
|
|
2010-02-20 09:03:30 +08:00
|
|
|
static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
|
2007-01-25 03:54:55 +08:00
|
|
|
{
|
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
|
|
|
|
if (mapping->nrpages != 0) {
|
|
|
|
int ret = invalidate_inode_pages2(mapping);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
spin_lock(&inode->i_lock);
|
|
|
|
nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
|
2007-10-01 03:31:19 +08:00
|
|
|
if (S_ISDIR(inode->i_mode))
|
2007-01-25 03:54:55 +08:00
|
|
|
memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
|
2009-04-03 23:42:43 +08:00
|
|
|
nfs_fscache_reset_inode_cookie(inode);
|
2007-01-25 03:54:55 +08:00
|
|
|
dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
|
|
|
|
inode->i_sb->s_id, (long long)NFS_FILEID(inode));
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nfs_revalidate_mapping - Revalidate the pagecache
|
|
|
|
* @inode - pointer to host inode
|
|
|
|
* @mapping - pointer to mapping
|
|
|
|
*/
|
|
|
|
int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
|
|
|
|
{
|
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
int ret = 0;
|
2005-08-19 02:24:12 +08:00
|
|
|
|
2007-01-25 03:54:55 +08:00
|
|
|
if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
|
2010-04-17 04:42:46 +08:00
|
|
|
|| nfs_attribute_cache_expired(inode)
|
|
|
|
|| NFS_STALE(inode)) {
|
2007-01-25 03:54:55 +08:00
|
|
|
ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
|
|
|
|
if (ret < 0)
|
|
|
|
goto out;
|
2005-06-23 01:16:30 +08:00
|
|
|
}
|
2007-01-25 03:54:55 +08:00
|
|
|
if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
|
|
|
|
ret = nfs_invalidate_mapping(inode, mapping);
|
2006-10-20 14:28:40 +08:00
|
|
|
out:
|
2006-05-25 13:40:59 +08:00
|
|
|
return ret;
|
2005-06-23 01:16:30 +08:00
|
|
|
}
|
|
|
|
|
2011-01-26 04:28:21 +08:00
|
|
|
static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
|
2006-01-03 16:55:40 +08:00
|
|
|
{
|
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
2011-01-26 04:28:21 +08:00
|
|
|
unsigned long ret = 0;
|
2006-01-03 16:55:40 +08:00
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
|
|
|
|
&& (fattr->valid & NFS_ATTR_FATTR_CHANGE)
|
2011-10-18 07:08:46 +08:00
|
|
|
&& inode->i_version == fattr->pre_change_attr) {
|
|
|
|
inode->i_version = fattr->change_attr;
|
2007-10-01 03:21:24 +08:00
|
|
|
if (S_ISDIR(inode->i_mode))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
|
2011-01-26 04:28:21 +08:00
|
|
|
ret |= NFS_INO_INVALID_ATTR;
|
2007-10-01 03:21:24 +08:00
|
|
|
}
|
2006-01-03 16:55:40 +08:00
|
|
|
/* If we have atomic WCC data, we may update some attributes */
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
|
|
|
|
&& (fattr->valid & NFS_ATTR_FATTR_CTIME)
|
2011-01-26 04:28:21 +08:00
|
|
|
&& timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
|
|
|
|
memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
|
|
|
|
ret |= NFS_INO_INVALID_ATTR;
|
|
|
|
}
|
2009-03-12 02:10:24 +08:00
|
|
|
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
|
|
|
|
&& (fattr->valid & NFS_ATTR_FATTR_MTIME)
|
|
|
|
&& timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
|
2011-01-26 04:28:21 +08:00
|
|
|
memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
|
|
|
|
if (S_ISDIR(inode->i_mode))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
|
|
|
|
ret |= NFS_INO_INVALID_ATTR;
|
2006-01-03 16:55:40 +08:00
|
|
|
}
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
|
|
|
|
&& (fattr->valid & NFS_ATTR_FATTR_SIZE)
|
|
|
|
&& i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
|
2011-01-26 04:28:21 +08:00
|
|
|
&& nfsi->npages == 0) {
|
|
|
|
i_size_write(inode, nfs_size_to_loff_t(fattr->size));
|
|
|
|
ret |= NFS_INO_INVALID_ATTR;
|
|
|
|
}
|
|
|
|
return ret;
|
2006-01-03 16:55:40 +08:00
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/**
|
2005-10-28 10:12:39 +08:00
|
|
|
* nfs_check_inode_attributes - verify consistency of the inode attribute cache
|
2005-04-17 06:20:36 +08:00
|
|
|
* @inode - pointer to inode
|
|
|
|
* @fattr - updated attributes
|
|
|
|
*
|
|
|
|
* Verifies the attribute cache. If we have just changed the attributes,
|
|
|
|
* so that fattr carries weak cache consistency data, then it may
|
|
|
|
* also update the ctime/mtime/change_attribute.
|
|
|
|
*/
|
2005-10-28 10:12:39 +08:00
|
|
|
static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
loff_t cur_size, new_isize;
|
2007-10-09 02:26:13 +08:00
|
|
|
unsigned long invalid = 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-08-19 02:24:12 +08:00
|
|
|
|
2006-03-21 02:44:07 +08:00
|
|
|
/* Has the inode gone and changed behind our back? */
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
|
|
|
|
return -EIO;
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
|
2006-03-21 02:44:07 +08:00
|
|
|
return -EIO;
|
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
|
2011-10-18 07:08:46 +08:00
|
|
|
inode->i_version != fattr->change_attr)
|
2007-10-09 02:26:13 +08:00
|
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Verify a few of the more important attributes */
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
|
2007-10-09 02:26:13 +08:00
|
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
|
2006-03-21 02:44:07 +08:00
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
|
|
|
|
cur_size = i_size_read(inode);
|
|
|
|
new_isize = nfs_size_to_loff_t(fattr->size);
|
|
|
|
if (cur_size != new_isize && nfsi->npages == 0)
|
|
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Have any file permissions changed? */
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
|
|
|
|
invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
|
|
|
|
invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
|
2007-10-09 02:26:13 +08:00
|
|
|
invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Has the link count changed? */
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
|
2007-10-09 02:26:13 +08:00
|
|
|
invalid |= NFS_INO_INVALID_ATTR;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
|
2007-10-09 02:26:13 +08:00
|
|
|
invalid |= NFS_INO_INVALID_ATIME;
|
|
|
|
|
|
|
|
if (invalid != 0)
|
|
|
|
nfsi->cache_validity |= invalid;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-10-28 10:12:39 +08:00
|
|
|
nfsi->read_cache_jiffies = fattr->time_start;
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-09-24 05:28:41 +08:00
|
|
|
static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
|
2008-10-06 00:07:23 +08:00
|
|
|
{
|
2009-03-12 02:10:24 +08:00
|
|
|
if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
|
|
|
|
return 0;
|
2008-09-24 05:28:41 +08:00
|
|
|
return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
|
|
|
|
{
|
2009-03-12 02:10:24 +08:00
|
|
|
if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
|
|
|
|
return 0;
|
2008-09-24 05:28:41 +08:00
|
|
|
return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
|
|
|
|
}
|
2008-10-06 00:07:23 +08:00
|
|
|
|
2008-10-29 03:21:40 +08:00
|
|
|
static atomic_long_t nfs_attr_generation_counter;
|
2008-10-15 07:16:07 +08:00
|
|
|
|
|
|
|
static unsigned long nfs_read_attr_generation_counter(void)
|
|
|
|
{
|
2008-10-29 03:21:40 +08:00
|
|
|
return atomic_long_read(&nfs_attr_generation_counter);
|
2008-10-15 07:16:07 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
unsigned long nfs_inc_attr_generation_counter(void)
|
|
|
|
{
|
2008-10-29 03:21:40 +08:00
|
|
|
return atomic_long_inc_return(&nfs_attr_generation_counter);
|
2008-10-15 07:16:07 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
void nfs_fattr_init(struct nfs_fattr *fattr)
|
|
|
|
{
|
|
|
|
fattr->valid = 0;
|
|
|
|
fattr->time_start = jiffies;
|
|
|
|
fattr->gencount = nfs_inc_attr_generation_counter();
|
2012-01-08 02:22:46 +08:00
|
|
|
fattr->owner_name = NULL;
|
|
|
|
fattr->group_name = NULL;
|
2008-10-15 07:16:07 +08:00
|
|
|
}
|
|
|
|
|
2010-04-17 04:22:45 +08:00
|
|
|
struct nfs_fattr *nfs_alloc_fattr(void)
|
|
|
|
{
|
|
|
|
struct nfs_fattr *fattr;
|
|
|
|
|
|
|
|
fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
|
|
|
|
if (fattr != NULL)
|
|
|
|
nfs_fattr_init(fattr);
|
|
|
|
return fattr;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct nfs_fh *nfs_alloc_fhandle(void)
|
|
|
|
{
|
|
|
|
struct nfs_fh *fh;
|
|
|
|
|
|
|
|
fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
|
|
|
|
if (fh != NULL)
|
|
|
|
fh->size = 0;
|
|
|
|
return fh;
|
|
|
|
}
|
|
|
|
|
2008-09-24 05:28:41 +08:00
|
|
|
/**
|
|
|
|
* nfs_inode_attrs_need_update - check if the inode attributes need updating
|
|
|
|
* @inode - pointer to inode
|
|
|
|
* @fattr - attributes
|
|
|
|
*
|
|
|
|
* Attempt to divine whether or not an RPC call reply carrying stale
|
|
|
|
* attributes got scheduled after another call carrying updated ones.
|
|
|
|
*
|
|
|
|
* To do so, the function first assumes that a more recent ctime means
|
|
|
|
* that the attributes in fattr are newer, however it also attempt to
|
|
|
|
* catch the case where ctime either didn't change, or went backwards
|
|
|
|
* (if someone reset the clock on the server) by looking at whether
|
|
|
|
* or not this RPC call was started after the inode was last updated.
|
2008-10-15 07:16:07 +08:00
|
|
|
* Note also the check for wraparound of 'attr_gencount'
|
2008-09-24 05:28:41 +08:00
|
|
|
*
|
|
|
|
* The function returns 'true' if it thinks the attributes in 'fattr' are
|
|
|
|
* more recent than the ones cached in the inode.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
|
|
|
|
{
|
|
|
|
const struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
|
2008-10-15 07:16:07 +08:00
|
|
|
return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
|
2008-10-10 01:27:55 +08:00
|
|
|
nfs_ctime_need_update(inode, fattr) ||
|
|
|
|
nfs_size_need_update(inode, fattr) ||
|
2008-10-15 07:16:07 +08:00
|
|
|
((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
|
2008-09-24 05:28:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
|
|
|
|
{
|
|
|
|
if (nfs_inode_attrs_need_update(inode, fattr))
|
2008-10-06 00:07:23 +08:00
|
|
|
return nfs_update_inode(inode, fattr);
|
|
|
|
return nfs_check_inode_attributes(inode, fattr);
|
|
|
|
}
|
|
|
|
|
2005-10-28 10:12:39 +08:00
|
|
|
/**
|
|
|
|
* nfs_refresh_inode - try to update the inode attribute cache
|
|
|
|
* @inode - pointer to inode
|
|
|
|
* @fattr - updated attributes
|
|
|
|
*
|
|
|
|
* Check that an RPC call that returned attributes has not overlapped with
|
|
|
|
* other recent updates of the inode metadata, then decide whether it is
|
|
|
|
* safe to do a full update of the inode attributes, or whether just to
|
|
|
|
* call nfs_check_inode_attributes.
|
|
|
|
*/
|
|
|
|
int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
|
|
|
|
{
|
|
|
|
int status;
|
|
|
|
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
|
|
|
|
return 0;
|
|
|
|
spin_lock(&inode->i_lock);
|
2008-10-06 00:07:23 +08:00
|
|
|
status = nfs_refresh_inode_locked(inode, fattr);
|
2005-10-28 10:12:39 +08:00
|
|
|
spin_unlock(&inode->i_lock);
|
2009-04-03 23:42:43 +08:00
|
|
|
|
2005-10-28 10:12:39 +08:00
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
2008-10-06 00:27:55 +08:00
|
|
|
static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
|
|
|
|
{
|
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
|
|
|
|
if (S_ISDIR(inode->i_mode))
|
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
|
|
|
|
return 0;
|
|
|
|
return nfs_refresh_inode_locked(inode, fattr);
|
|
|
|
}
|
|
|
|
|
2005-10-28 10:12:39 +08:00
|
|
|
/**
|
|
|
|
* nfs_post_op_update_inode - try to update the inode attribute cache
|
|
|
|
* @inode - pointer to inode
|
|
|
|
* @fattr - updated attributes
|
|
|
|
*
|
|
|
|
* After an operation that has changed the inode metadata, mark the
|
|
|
|
* attribute cache as being invalid, then try to update it.
|
2006-09-21 02:33:04 +08:00
|
|
|
*
|
|
|
|
* NB: if the server didn't return any post op attributes, this
|
|
|
|
* function will force the retrieval of attributes before the next
|
|
|
|
* NFS request. Thus it should be used only for operations that
|
|
|
|
* are expected to change one or more attributes, to avoid
|
|
|
|
* unnecessary NFS requests and trips through nfs_update_inode().
|
2005-10-28 10:12:39 +08:00
|
|
|
*/
|
|
|
|
int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
|
|
|
|
{
|
2008-10-06 00:27:55 +08:00
|
|
|
int status;
|
2005-10-28 10:12:39 +08:00
|
|
|
|
2007-10-01 21:59:15 +08:00
|
|
|
spin_lock(&inode->i_lock);
|
2008-10-06 00:27:55 +08:00
|
|
|
status = nfs_post_op_update_inode_locked(inode, fattr);
|
2007-10-01 21:59:15 +08:00
|
|
|
spin_unlock(&inode->i_lock);
|
2008-10-06 00:07:23 +08:00
|
|
|
return status;
|
2005-10-28 10:12:39 +08:00
|
|
|
}
|
|
|
|
|
2007-10-01 03:21:24 +08:00
|
|
|
/**
|
|
|
|
* nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
|
|
|
|
* @inode - pointer to inode
|
|
|
|
* @fattr - updated attributes
|
|
|
|
*
|
|
|
|
* After an operation that has changed the inode metadata, mark the
|
|
|
|
* attribute cache as being invalid, then try to update it. Fake up
|
|
|
|
* weak cache consistency data, if none exist.
|
|
|
|
*
|
|
|
|
* This function is mainly designed to be used by the ->write_done() functions.
|
|
|
|
*/
|
|
|
|
int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
|
|
|
|
{
|
2008-10-06 00:27:55 +08:00
|
|
|
int status;
|
|
|
|
|
|
|
|
spin_lock(&inode->i_lock);
|
|
|
|
/* Don't do a WCC update if these attributes are already stale */
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
|
|
|
|
!nfs_inode_attrs_need_update(inode, fattr)) {
|
2009-03-12 02:10:24 +08:00
|
|
|
fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
|
|
|
|
| NFS_ATTR_FATTR_PRESIZE
|
|
|
|
| NFS_ATTR_FATTR_PREMTIME
|
|
|
|
| NFS_ATTR_FATTR_PRECTIME);
|
2008-10-06 00:27:55 +08:00
|
|
|
goto out_noforce;
|
|
|
|
}
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
|
|
|
|
(fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
|
2011-10-18 07:08:46 +08:00
|
|
|
fattr->pre_change_attr = inode->i_version;
|
2009-03-12 02:10:24 +08:00
|
|
|
fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
|
2007-10-01 03:21:24 +08:00
|
|
|
}
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
|
|
|
|
(fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
|
2007-10-01 03:21:24 +08:00
|
|
|
memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
|
2009-03-12 02:10:24 +08:00
|
|
|
fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
|
|
|
|
}
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
|
|
|
|
(fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
|
2007-10-01 03:21:24 +08:00
|
|
|
memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
|
2009-03-12 02:10:24 +08:00
|
|
|
fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
|
|
|
|
}
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
|
|
|
|
(fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
|
2008-06-12 00:21:19 +08:00
|
|
|
fattr->pre_size = i_size_read(inode);
|
2009-03-12 02:10:24 +08:00
|
|
|
fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
|
2007-10-01 03:21:24 +08:00
|
|
|
}
|
2008-10-06 00:27:55 +08:00
|
|
|
out_noforce:
|
|
|
|
status = nfs_post_op_update_inode_locked(inode, fattr);
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
return status;
|
2007-10-01 03:21:24 +08:00
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* Many nfs protocol calls return the new file attributes after
|
|
|
|
* an operation. Here we update the inode to reflect the state
|
|
|
|
* of the server's inode.
|
|
|
|
*
|
|
|
|
* This is a bit tricky because we have to make sure all dirty pages
|
|
|
|
* have been sent off to the server before calling invalidate_inode_pages.
|
|
|
|
* To make sure no other process adds more write requests while we try
|
|
|
|
* our best to flush them, we make them sleep during the attribute refresh.
|
|
|
|
*
|
|
|
|
* A very similar scenario holds for the dir cache.
|
|
|
|
*/
|
2005-12-04 04:20:07 +08:00
|
|
|
static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2006-06-09 21:34:19 +08:00
|
|
|
struct nfs_server *server;
|
2005-04-17 06:20:36 +08:00
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
2005-06-23 01:16:30 +08:00
|
|
|
loff_t cur_isize, new_isize;
|
2007-10-09 02:26:13 +08:00
|
|
|
unsigned long invalid = 0;
|
2007-02-06 06:26:28 +08:00
|
|
|
unsigned long now = jiffies;
|
2009-08-10 03:06:19 +08:00
|
|
|
unsigned long save_cache_validity;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
|
2008-05-03 04:42:44 +08:00
|
|
|
__func__, inode->i_sb->s_id, inode->i_ino,
|
2005-04-17 06:20:36 +08:00
|
|
|
atomic_read(&inode->i_count), fattr->valid);
|
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
|
2005-12-01 07:08:55 +08:00
|
|
|
goto out_fileid;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Make sure the inode's type hasn't changed.
|
|
|
|
*/
|
2009-03-12 02:10:24 +08:00
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
|
2005-04-17 06:20:36 +08:00
|
|
|
goto out_changed;
|
|
|
|
|
2006-06-09 21:34:19 +08:00
|
|
|
server = NFS_SERVER(inode);
|
2007-06-06 01:26:15 +08:00
|
|
|
/* Update the fsid? */
|
2009-03-12 02:10:24 +08:00
|
|
|
if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
|
2008-03-07 01:34:50 +08:00
|
|
|
!nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
|
2011-01-15 02:45:42 +08:00
|
|
|
!IS_AUTOMOUNT(inode))
|
2006-06-09 21:34:19 +08:00
|
|
|
server->fsid = fattr->fsid;
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* Update the read time so we don't revalidate too often.
|
|
|
|
*/
|
2005-10-28 10:12:39 +08:00
|
|
|
nfsi->read_cache_jiffies = fattr->time_start;
|
2007-02-06 06:26:28 +08:00
|
|
|
|
2009-08-10 03:06:19 +08:00
|
|
|
save_cache_validity = nfsi->cache_validity;
|
|
|
|
nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_ATIME
|
|
|
|
| NFS_INO_REVAL_FORCED
|
|
|
|
| NFS_INO_REVAL_PAGECACHE);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-01-03 16:55:40 +08:00
|
|
|
/* Do atomic weak cache consistency updates */
|
2011-01-26 04:28:21 +08:00
|
|
|
invalid |= nfs_wcc_update_inode(inode, fattr);
|
2006-01-03 16:55:40 +08:00
|
|
|
|
2007-09-28 03:57:24 +08:00
|
|
|
/* More cache consistency checks */
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
|
2011-10-18 07:08:46 +08:00
|
|
|
if (inode->i_version != fattr->change_attr) {
|
2009-03-12 02:10:24 +08:00
|
|
|
dprintk("NFS: change_attr change on server for file %s/%ld\n",
|
|
|
|
inode->i_sb->s_id, inode->i_ino);
|
|
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
|
|
|
|
if (S_ISDIR(inode->i_mode))
|
|
|
|
nfs_force_lookup_revalidate(inode);
|
2011-10-18 07:08:46 +08:00
|
|
|
inode->i_version = fattr->change_attr;
|
2009-03-12 02:10:24 +08:00
|
|
|
}
|
2009-08-10 03:06:19 +08:00
|
|
|
} else if (server->caps & NFS_CAP_CHANGE_ATTR)
|
|
|
|
invalid |= save_cache_validity;
|
2009-03-12 02:10:24 +08:00
|
|
|
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
|
2007-09-28 03:57:24 +08:00
|
|
|
/* NFSv2/v3: Check if the mtime agrees */
|
|
|
|
if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
|
|
|
|
dprintk("NFS: mtime change on server for file %s/%ld\n",
|
|
|
|
inode->i_sb->s_id, inode->i_ino);
|
|
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
|
2007-10-16 06:18:29 +08:00
|
|
|
if (S_ISDIR(inode->i_mode))
|
|
|
|
nfs_force_lookup_revalidate(inode);
|
2009-03-12 02:10:24 +08:00
|
|
|
memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
|
2007-09-28 03:57:24 +08:00
|
|
|
}
|
2009-08-10 03:06:19 +08:00
|
|
|
} else if (server->caps & NFS_CAP_MTIME)
|
|
|
|
invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_DATA
|
|
|
|
| NFS_INO_REVAL_PAGECACHE
|
|
|
|
| NFS_INO_REVAL_FORCED);
|
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
|
2007-09-28 03:57:24 +08:00
|
|
|
/* If ctime has changed we should definitely clear access+acl caches */
|
2009-03-12 02:10:23 +08:00
|
|
|
if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
|
2008-10-15 07:16:07 +08:00
|
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
|
2009-03-12 02:10:23 +08:00
|
|
|
/* and probably clear data for a directory too as utimes can cause
|
|
|
|
* havoc with our cache.
|
|
|
|
*/
|
|
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
|
|
invalid |= NFS_INO_INVALID_DATA;
|
|
|
|
nfs_force_lookup_revalidate(inode);
|
|
|
|
}
|
2009-03-12 02:10:24 +08:00
|
|
|
memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
|
2009-03-12 02:10:23 +08:00
|
|
|
}
|
2009-08-10 03:06:19 +08:00
|
|
|
} else if (server->caps & NFS_CAP_CTIME)
|
|
|
|
invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_ACCESS
|
|
|
|
| NFS_INO_INVALID_ACL
|
|
|
|
| NFS_INO_REVAL_FORCED);
|
2007-09-28 03:57:24 +08:00
|
|
|
|
2005-06-23 01:16:30 +08:00
|
|
|
/* Check if our cached file size is stale */
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
|
|
|
|
new_isize = nfs_size_to_loff_t(fattr->size);
|
|
|
|
cur_isize = i_size_read(inode);
|
|
|
|
if (new_isize != cur_isize) {
|
|
|
|
/* Do we perhaps have any outstanding writes, or has
|
|
|
|
* the file grown beyond our last write? */
|
2010-10-17 13:07:46 +08:00
|
|
|
if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) ||
|
|
|
|
new_isize > cur_isize) {
|
2009-03-12 02:10:24 +08:00
|
|
|
i_size_write(inode, new_isize);
|
|
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
|
|
|
|
}
|
2011-05-23 20:52:11 +08:00
|
|
|
dprintk("NFS: isize change on server for file %s/%ld "
|
|
|
|
"(%Ld to %Ld)\n",
|
|
|
|
inode->i_sb->s_id,
|
|
|
|
inode->i_ino,
|
|
|
|
(long long)cur_isize,
|
|
|
|
(long long)new_isize);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2009-08-10 03:06:19 +08:00
|
|
|
} else
|
|
|
|
invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_REVAL_PAGECACHE
|
|
|
|
| NFS_INO_REVAL_FORCED);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_ATIME)
|
|
|
|
memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
|
2009-08-10 03:06:19 +08:00
|
|
|
else if (server->caps & NFS_CAP_ATIME)
|
|
|
|
invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
|
|
|
|
| NFS_INO_REVAL_FORCED);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_MODE) {
|
|
|
|
if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
|
2010-02-03 21:27:35 +08:00
|
|
|
umode_t newmode = inode->i_mode & S_IFMT;
|
|
|
|
newmode |= fattr->mode & S_IALLUGO;
|
|
|
|
inode->i_mode = newmode;
|
2009-03-12 02:10:24 +08:00
|
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
|
|
|
|
}
|
2009-08-10 03:06:19 +08:00
|
|
|
} else if (server->caps & NFS_CAP_MODE)
|
|
|
|
invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_ACCESS
|
|
|
|
| NFS_INO_INVALID_ACL
|
|
|
|
| NFS_INO_REVAL_FORCED);
|
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
|
|
|
|
if (inode->i_uid != fattr->uid) {
|
|
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
|
|
|
|
inode->i_uid = fattr->uid;
|
|
|
|
}
|
2009-08-10 03:06:19 +08:00
|
|
|
} else if (server->caps & NFS_CAP_OWNER)
|
|
|
|
invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_ACCESS
|
|
|
|
| NFS_INO_INVALID_ACL
|
|
|
|
| NFS_INO_REVAL_FORCED);
|
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
|
|
|
|
if (inode->i_gid != fattr->gid) {
|
|
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
|
|
|
|
inode->i_gid = fattr->gid;
|
|
|
|
}
|
2009-08-10 03:06:19 +08:00
|
|
|
} else if (server->caps & NFS_CAP_OWNER_GROUP)
|
|
|
|
invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_INVALID_ACCESS
|
|
|
|
| NFS_INO_INVALID_ACL
|
|
|
|
| NFS_INO_REVAL_FORCED);
|
2008-10-15 07:23:07 +08:00
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
|
|
|
|
if (inode->i_nlink != fattr->nlink) {
|
|
|
|
invalid |= NFS_INO_INVALID_ATTR;
|
|
|
|
if (S_ISDIR(inode->i_mode))
|
|
|
|
invalid |= NFS_INO_INVALID_DATA;
|
2011-10-28 20:13:29 +08:00
|
|
|
set_nlink(inode, fattr->nlink);
|
2009-03-12 02:10:24 +08:00
|
|
|
}
|
2009-08-10 03:06:19 +08:00
|
|
|
} else if (server->caps & NFS_CAP_NLINK)
|
|
|
|
invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
|
|
|
|
| NFS_INO_REVAL_FORCED);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* report the blocks in 512byte units
|
|
|
|
*/
|
|
|
|
inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
|
|
|
|
}
|
2009-03-12 02:10:24 +08:00
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
|
|
|
|
inode->i_blocks = fattr->du.nfs2.blocks;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Update attrtimeo value if we're out of the unstable period */
|
|
|
|
if (invalid & NFS_INO_INVALID_ATTR) {
|
2006-03-21 02:44:14 +08:00
|
|
|
nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
|
2005-04-17 06:20:36 +08:00
|
|
|
nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
|
2007-02-06 06:26:28 +08:00
|
|
|
nfsi->attrtimeo_timestamp = now;
|
2008-10-15 07:16:07 +08:00
|
|
|
nfsi->attr_gencount = nfs_inc_attr_generation_counter();
|
2007-10-02 06:57:50 +08:00
|
|
|
} else {
|
optimize attribute timeouts for "noac" and "actimeo=0"
Hi.
I've been looking at a bugzilla which describes a problem where
a customer was advised to use either the "noac" or "actimeo=0"
mount options to solve a consistency problem that they were
seeing in the file attributes. It turned out that this solution
did not work reliably for them because sometimes, the local
attribute cache was believed to be valid and not timed out.
(With an attribute cache timeout of 0, the cache should always
appear to be timed out.)
In looking at this situation, it appears to me that the problem
is that the attribute cache timeout code has an off-by-one
error in it. It is assuming that the cache is valid in the
region, [read_cache_jiffies, read_cache_jiffies + attrtimeo]. The
cache should be considered valid only in the region,
[read_cache_jiffies, read_cache_jiffies + attrtimeo). With this
change, the options, "noac" and "actimeo=0", work as originally
expected.
This problem was previously addressed by special casing the
attrtimeo == 0 case. However, since the problem is only an off-
by-one error, the cleaner solution is address the off-by-one
error and thus, not require the special case.
Thanx...
ps
Signed-off-by: Peter Staubach <staubach@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-12-24 04:21:56 +08:00
|
|
|
if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
|
2007-10-02 06:57:50 +08:00
|
|
|
if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
|
|
|
|
nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
|
|
|
|
nfsi->attrtimeo_timestamp = now;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2007-08-16 00:49:17 +08:00
|
|
|
invalid &= ~NFS_INO_INVALID_ATTR;
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Don't invalidate the data if we were to blame */
|
|
|
|
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
|
|
|
|
|| S_ISLNK(inode->i_mode)))
|
|
|
|
invalid &= ~NFS_INO_INVALID_DATA;
|
2007-07-04 04:10:55 +08:00
|
|
|
if (!nfs_have_delegation(inode, FMODE_READ) ||
|
2009-08-10 03:06:19 +08:00
|
|
|
(save_cache_validity & NFS_INO_REVAL_FORCED))
|
2005-08-19 02:24:09 +08:00
|
|
|
nfsi->cache_validity |= invalid;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
out_changed:
|
|
|
|
/*
|
|
|
|
* Big trouble! The inode has become a different object.
|
|
|
|
*/
|
2012-01-27 02:32:23 +08:00
|
|
|
printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n",
|
2008-05-03 04:42:44 +08:00
|
|
|
__func__, inode->i_ino, inode->i_mode, fattr->mode);
|
2005-11-26 06:10:06 +08:00
|
|
|
out_err:
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* No need to worry about unhashing the dentry, as the
|
|
|
|
* lookup validation will know that the inode is bad.
|
|
|
|
* (But we fall through to invalidate the caches.)
|
|
|
|
*/
|
|
|
|
nfs_invalidate_inode(inode);
|
|
|
|
return -ESTALE;
|
2005-12-01 07:08:55 +08:00
|
|
|
|
|
|
|
out_fileid:
|
|
|
|
printk(KERN_ERR "NFS: server %s error: fileid changed\n"
|
|
|
|
"fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
|
NFS: Share NFS superblocks per-protocol per-server per-FSID
The attached patch makes NFS share superblocks between mounts from the same
server and FSID over the same protocol.
It does this by creating each superblock with a false root and returning the
real root dentry in the vfsmount presented by get_sb(). The root dentry set
starts off as an anonymous dentry if we don't already have the dentry for its
inode, otherwise it simply returns the dentry we already have.
We may thus end up with several trees of dentries in the superblock, and if at
some later point one of anonymous tree roots is discovered by normal filesystem
activity to be located in another tree within the superblock, the anonymous
root is named and materialises attached to the second tree at the appropriate
point.
Why do it this way? Why not pass an extra argument to the mount() syscall to
indicate the subpath and then pathwalk from the server root to the desired
directory? You can't guarantee this will work for two reasons:
(1) The root and intervening nodes may not be accessible to the client.
With NFS2 and NFS3, for instance, mountd is called on the server to get
the filehandle for the tip of a path. mountd won't give us handles for
anything we don't have permission to access, and so we can't set up NFS
inodes for such nodes, and so can't easily set up dentries (we'd have to
have ghost inodes or something).
With this patch we don't actually create dentries until we get handles
from the server that we can use to set up their inodes, and we don't
actually bind them into the tree until we know for sure where they go.
(2) Inaccessible symbolic links.
If we're asked to mount two exports from the server, eg:
mount warthog:/warthog/aaa/xxx /mmm
mount warthog:/warthog/bbb/yyy /nnn
We may not be able to access anything nearer the root than xxx and yyy,
but we may find out later that /mmm/www/yyy, say, is actually the same
directory as the one mounted on /nnn. What we might then find out, for
example, is that /warthog/bbb was actually a symbolic link to
/warthog/aaa/xxx/www, but we can't actually determine that by talking to
the server until /warthog is made available by NFS.
This would lead to having constructed an errneous dentry tree which we
can't easily fix. We can end up with a dentry marked as a directory when
it should actually be a symlink, or we could end up with an apparently
hardlinked directory.
With this patch we need not make assumptions about the type of a dentry
for which we can't retrieve information, nor need we assume we know its
place in the grand scheme of things until we actually see that place.
This patch reduces the possibility of aliasing in the inode and page caches for
inodes that may be accessed by more than one NFS export. It also reduces the
number of superblocks required for NFS where there are many NFS exports being
used from a server (home directory server + autofs for example).
This in turn makes it simpler to do local caching of network filesystems, as it
can then be guaranteed that there won't be links from multiple inodes in
separate superblocks to the same cache file.
Obviously, cache aliasing between different levels of NFS protocol could still
be a problem, but at least that gives us another key to use when indexing the
cache.
This patch makes the following changes:
(1) The server record construction/destruction has been abstracted out into
its own set of functions to make things easier to get right. These have
been moved into fs/nfs/client.c.
All the code in fs/nfs/client.c has to do with the management of
connections to servers, and doesn't touch superblocks in any way; the
remaining code in fs/nfs/super.c has to do with VFS superblock management.
(2) The sequence of events undertaken by NFS mount is now reordered:
(a) A volume representation (struct nfs_server) is allocated.
(b) A server representation (struct nfs_client) is acquired. This may be
allocated or shared, and is keyed on server address, port and NFS
version.
(c) If allocated, the client representation is initialised. The state
member variable of nfs_client is used to prevent a race during
initialisation from two mounts.
(d) For NFS4 a simple pathwalk is performed, walking from FH to FH to find
the root filehandle for the mount (fs/nfs/getroot.c). For NFS2/3 we
are given the root FH in advance.
(e) The volume FSID is probed for on the root FH.
(f) The volume representation is initialised from the FSINFO record
retrieved on the root FH.
(g) sget() is called to acquire a superblock. This may be allocated or
shared, keyed on client pointer and FSID.
(h) If allocated, the superblock is initialised.
(i) If the superblock is shared, then the new nfs_server record is
discarded.
(j) The root dentry for this mount is looked up from the root FH.
(k) The root dentry for this mount is assigned to the vfsmount.
(3) nfs_readdir_lookup() creates dentries for each of the entries readdir()
returns; this function now attaches disconnected trees from alternate
roots that happen to be discovered attached to a directory being read (in
the same way nfs_lookup() is made to do for lookup ops).
The new d_materialise_unique() function is now used to do this, thus
permitting the whole thing to be done under one set of locks, and thus
avoiding any race between mount and lookup operations on the same
directory.
(4) The client management code uses a new debug facility: NFSDBG_CLIENT which
is set by echoing 1024 to /proc/net/sunrpc/nfs_debug.
(5) Clone mounts are now called xdev mounts.
(6) Use the dentry passed to the statfs() op as the handle for retrieving fs
statistics rather than the root dentry of the superblock (which is now a
dummy).
Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-08-23 08:06:13 +08:00
|
|
|
NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
|
2005-12-01 07:08:55 +08:00
|
|
|
(long long)nfsi->fileid, (long long)fattr->fileid);
|
|
|
|
goto out_err;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2006-06-09 21:34:19 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
#ifdef CONFIG_NFS_V4
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Clean out any remaining NFSv4 state that might be left over due
|
|
|
|
* to open() calls that passed nfs_atomic_lookup, but failed to call
|
|
|
|
* nfs_open().
|
|
|
|
*/
|
2010-06-08 02:34:48 +08:00
|
|
|
void nfs4_evict_inode(struct inode *inode)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2010-06-08 02:34:48 +08:00
|
|
|
truncate_inode_pages(&inode->i_data, 0);
|
|
|
|
end_writeback(inode);
|
2011-05-23 00:52:37 +08:00
|
|
|
pnfs_return_layout(inode);
|
|
|
|
pnfs_destroy_layout(NFS_I(inode));
|
2005-04-17 06:20:36 +08:00
|
|
|
/* If we are holding a delegation, return it! */
|
2008-01-25 07:14:34 +08:00
|
|
|
nfs_inode_return_delegation_noreclaim(inode);
|
2005-04-17 06:20:36 +08:00
|
|
|
/* First call standard NFS clear_inode() code */
|
|
|
|
nfs_clear_inode(inode);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
NFS: Split fs/nfs/inode.c
As fs/nfs/inode.c is rather large, heterogenous and unwieldy, the attached
patch splits it up into a number of files:
(*) fs/nfs/inode.c
Strictly inode specific functions.
(*) fs/nfs/super.c
Superblock management functions for NFS and NFS4, normal access, clones
and referrals. The NFS4 superblock functions _could_ move out into a
separate conditionally compiled file, but it's probably not worth it as
there're so many common bits.
(*) fs/nfs/namespace.c
Some namespace-specific functions have been moved here.
(*) fs/nfs/nfs4namespace.c
NFS4-specific namespace functions (this could be merged into the previous
file). This file is conditionally compiled.
(*) fs/nfs/internal.h
Inter-file declarations, plus a few simple utility functions moved from
fs/nfs/inode.c.
Additionally, all the in-.c-file externs have been moved here, and those
files they were moved from now includes this file.
For the most part, the functions have not been changed, only some multiplexor
functions have changed significantly.
I've also:
(*) Added some extra banner comments above some functions.
(*) Rearranged the function order within the files to be more logical and
better grouped (IMO), though someone may prefer a different order.
(*) Reduced the number of #ifdefs in .c files.
(*) Added missing __init and __exit directives.
Signed-Off-By: David Howells <dhowells@redhat.com>
2006-06-09 21:34:33 +08:00
|
|
|
struct inode *nfs_alloc_inode(struct super_block *sb)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct nfs_inode *nfsi;
|
2006-12-07 12:33:17 +08:00
|
|
|
nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!nfsi)
|
|
|
|
return NULL;
|
2005-08-19 02:24:09 +08:00
|
|
|
nfsi->flags = 0UL;
|
|
|
|
nfsi->cache_validity = 0UL;
|
2005-06-23 01:16:27 +08:00
|
|
|
#ifdef CONFIG_NFS_V3_ACL
|
|
|
|
nfsi->acl_access = ERR_PTR(-EAGAIN);
|
|
|
|
nfsi->acl_default = ERR_PTR(-EAGAIN);
|
|
|
|
#endif
|
2005-06-23 01:16:23 +08:00
|
|
|
#ifdef CONFIG_NFS_V4
|
|
|
|
nfsi->nfs4_acl = NULL;
|
|
|
|
#endif /* CONFIG_NFS_V4 */
|
2005-04-17 06:20:36 +08:00
|
|
|
return &nfsi->vfs_inode;
|
|
|
|
}
|
|
|
|
|
2011-01-07 14:49:49 +08:00
|
|
|
static void nfs_i_callback(struct rcu_head *head)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2011-01-07 14:49:49 +08:00
|
|
|
struct inode *inode = container_of(head, struct inode, i_rcu);
|
2005-04-17 06:20:36 +08:00
|
|
|
kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
|
|
|
|
}
|
|
|
|
|
2011-01-07 14:49:49 +08:00
|
|
|
void nfs_destroy_inode(struct inode *inode)
|
|
|
|
{
|
|
|
|
call_rcu(&inode->i_rcu, nfs_i_callback);
|
|
|
|
}
|
|
|
|
|
2006-06-25 17:41:26 +08:00
|
|
|
static inline void nfs4_init_once(struct nfs_inode *nfsi)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_NFS_V4
|
|
|
|
INIT_LIST_HEAD(&nfsi->open_states);
|
|
|
|
nfsi->delegation = NULL;
|
|
|
|
nfsi->delegation_state = 0;
|
|
|
|
init_rwsem(&nfsi->rwsem);
|
2010-10-20 12:18:01 +08:00
|
|
|
nfsi->layout = NULL;
|
2011-03-23 21:27:53 +08:00
|
|
|
atomic_set(&nfsi->commits_outstanding, 0);
|
2006-06-25 17:41:26 +08:00
|
|
|
#endif
|
|
|
|
}
|
NFS: Split fs/nfs/inode.c
As fs/nfs/inode.c is rather large, heterogenous and unwieldy, the attached
patch splits it up into a number of files:
(*) fs/nfs/inode.c
Strictly inode specific functions.
(*) fs/nfs/super.c
Superblock management functions for NFS and NFS4, normal access, clones
and referrals. The NFS4 superblock functions _could_ move out into a
separate conditionally compiled file, but it's probably not worth it as
there're so many common bits.
(*) fs/nfs/namespace.c
Some namespace-specific functions have been moved here.
(*) fs/nfs/nfs4namespace.c
NFS4-specific namespace functions (this could be merged into the previous
file). This file is conditionally compiled.
(*) fs/nfs/internal.h
Inter-file declarations, plus a few simple utility functions moved from
fs/nfs/inode.c.
Additionally, all the in-.c-file externs have been moved here, and those
files they were moved from now includes this file.
For the most part, the functions have not been changed, only some multiplexor
functions have changed significantly.
I've also:
(*) Added some extra banner comments above some functions.
(*) Rearranged the function order within the files to be more logical and
better grouped (IMO), though someone may prefer a different order.
(*) Reduced the number of #ifdefs in .c files.
(*) Added missing __init and __exit directives.
Signed-Off-By: David Howells <dhowells@redhat.com>
2006-06-09 21:34:33 +08:00
|
|
|
|
2008-07-26 10:45:34 +08:00
|
|
|
static void init_once(void *foo)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct nfs_inode *nfsi = (struct nfs_inode *) foo;
|
|
|
|
|
2007-05-17 13:10:57 +08:00
|
|
|
inode_init_once(&nfsi->vfs_inode);
|
|
|
|
INIT_LIST_HEAD(&nfsi->open_files);
|
|
|
|
INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
|
|
|
|
INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
|
|
|
|
INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
|
|
|
|
nfsi->npages = 0;
|
2010-02-20 08:53:39 +08:00
|
|
|
nfsi->ncommit = 0;
|
2007-10-16 06:17:53 +08:00
|
|
|
atomic_set(&nfsi->silly_count, 1);
|
|
|
|
INIT_HLIST_HEAD(&nfsi->silly_list);
|
|
|
|
init_waitqueue_head(&nfsi->waitqueue);
|
2007-05-17 13:10:57 +08:00
|
|
|
nfs4_init_once(nfsi);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2007-07-20 09:11:58 +08:00
|
|
|
|
NFS: Split fs/nfs/inode.c
As fs/nfs/inode.c is rather large, heterogenous and unwieldy, the attached
patch splits it up into a number of files:
(*) fs/nfs/inode.c
Strictly inode specific functions.
(*) fs/nfs/super.c
Superblock management functions for NFS and NFS4, normal access, clones
and referrals. The NFS4 superblock functions _could_ move out into a
separate conditionally compiled file, but it's probably not worth it as
there're so many common bits.
(*) fs/nfs/namespace.c
Some namespace-specific functions have been moved here.
(*) fs/nfs/nfs4namespace.c
NFS4-specific namespace functions (this could be merged into the previous
file). This file is conditionally compiled.
(*) fs/nfs/internal.h
Inter-file declarations, plus a few simple utility functions moved from
fs/nfs/inode.c.
Additionally, all the in-.c-file externs have been moved here, and those
files they were moved from now includes this file.
For the most part, the functions have not been changed, only some multiplexor
functions have changed significantly.
I've also:
(*) Added some extra banner comments above some functions.
(*) Rearranged the function order within the files to be more logical and
better grouped (IMO), though someone may prefer a different order.
(*) Reduced the number of #ifdefs in .c files.
(*) Added missing __init and __exit directives.
Signed-Off-By: David Howells <dhowells@redhat.com>
2006-06-09 21:34:33 +08:00
|
|
|
static int __init nfs_init_inodecache(void)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
|
|
|
|
sizeof(struct nfs_inode),
|
2006-03-24 19:16:06 +08:00
|
|
|
0, (SLAB_RECLAIM_ACCOUNT|
|
|
|
|
SLAB_MEM_SPREAD),
|
2007-07-20 09:11:58 +08:00
|
|
|
init_once);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (nfs_inode_cachep == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-06-28 03:59:15 +08:00
|
|
|
static void nfs_destroy_inodecache(void)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2006-09-27 16:49:40 +08:00
|
|
|
kmem_cache_destroy(nfs_inode_cachep);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-02-20 09:04:22 +08:00
|
|
|
struct workqueue_struct *nfsiod_workqueue;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* start up the nfsiod workqueue
|
|
|
|
*/
|
|
|
|
static int nfsiod_start(void)
|
|
|
|
{
|
|
|
|
struct workqueue_struct *wq;
|
|
|
|
dprintk("RPC: creating workqueue nfsiod\n");
|
2011-01-25 21:35:54 +08:00
|
|
|
wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0);
|
2008-02-20 09:04:22 +08:00
|
|
|
if (wq == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
nfsiod_workqueue = wq;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Destroy the nfsiod workqueue
|
|
|
|
*/
|
|
|
|
static void nfsiod_stop(void)
|
|
|
|
{
|
|
|
|
struct workqueue_struct *wq;
|
|
|
|
|
|
|
|
wq = nfsiod_workqueue;
|
|
|
|
if (wq == NULL)
|
|
|
|
return;
|
|
|
|
nfsiod_workqueue = NULL;
|
|
|
|
destroy_workqueue(wq);
|
|
|
|
}
|
|
|
|
|
2011-11-25 22:13:04 +08:00
|
|
|
int nfs_net_id;
|
2012-01-10 21:04:24 +08:00
|
|
|
EXPORT_SYMBOL_GPL(nfs_net_id);
|
2011-11-25 22:13:04 +08:00
|
|
|
|
|
|
|
static int nfs_net_init(struct net *net)
|
|
|
|
{
|
|
|
|
return nfs_dns_resolver_cache_init(net);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void nfs_net_exit(struct net *net)
|
|
|
|
{
|
|
|
|
nfs_dns_resolver_cache_destroy(net);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct pernet_operations nfs_net_ops = {
|
|
|
|
.init = nfs_net_init,
|
|
|
|
.exit = nfs_net_exit,
|
|
|
|
.id = &nfs_net_id,
|
|
|
|
.size = sizeof(struct nfs_net),
|
|
|
|
};
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* Initialize NFS
|
|
|
|
*/
|
|
|
|
static int __init init_nfs_fs(void)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
2010-09-30 03:41:49 +08:00
|
|
|
err = nfs_idmap_init();
|
|
|
|
if (err < 0)
|
2011-11-25 22:13:04 +08:00
|
|
|
goto out10;
|
2010-09-30 03:41:49 +08:00
|
|
|
|
2009-08-20 06:12:27 +08:00
|
|
|
err = nfs_dns_resolver_init();
|
2011-11-25 22:13:04 +08:00
|
|
|
if (err < 0)
|
|
|
|
goto out9;
|
|
|
|
|
|
|
|
err = register_pernet_subsys(&nfs_net_ops);
|
2009-08-20 06:12:27 +08:00
|
|
|
if (err < 0)
|
|
|
|
goto out8;
|
|
|
|
|
2009-04-03 23:42:42 +08:00
|
|
|
err = nfs_fscache_register();
|
|
|
|
if (err < 0)
|
|
|
|
goto out7;
|
|
|
|
|
2008-02-20 09:04:22 +08:00
|
|
|
err = nfsiod_start();
|
|
|
|
if (err)
|
|
|
|
goto out6;
|
|
|
|
|
2006-08-23 08:06:13 +08:00
|
|
|
err = nfs_fs_proc_init();
|
|
|
|
if (err)
|
|
|
|
goto out5;
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
err = nfs_init_nfspagecache();
|
|
|
|
if (err)
|
|
|
|
goto out4;
|
|
|
|
|
|
|
|
err = nfs_init_inodecache();
|
|
|
|
if (err)
|
|
|
|
goto out3;
|
|
|
|
|
|
|
|
err = nfs_init_readpagecache();
|
|
|
|
if (err)
|
|
|
|
goto out2;
|
|
|
|
|
|
|
|
err = nfs_init_writepagecache();
|
|
|
|
if (err)
|
|
|
|
goto out1;
|
|
|
|
|
|
|
|
err = nfs_init_directcache();
|
|
|
|
if (err)
|
|
|
|
goto out0;
|
|
|
|
|
|
|
|
#ifdef CONFIG_PROC_FS
|
2011-12-06 21:42:40 +08:00
|
|
|
rpc_proc_register(&init_net, &nfs_rpcstat);
|
2005-04-17 06:20:36 +08:00
|
|
|
#endif
|
NFS: Split fs/nfs/inode.c
As fs/nfs/inode.c is rather large, heterogenous and unwieldy, the attached
patch splits it up into a number of files:
(*) fs/nfs/inode.c
Strictly inode specific functions.
(*) fs/nfs/super.c
Superblock management functions for NFS and NFS4, normal access, clones
and referrals. The NFS4 superblock functions _could_ move out into a
separate conditionally compiled file, but it's probably not worth it as
there're so many common bits.
(*) fs/nfs/namespace.c
Some namespace-specific functions have been moved here.
(*) fs/nfs/nfs4namespace.c
NFS4-specific namespace functions (this could be merged into the previous
file). This file is conditionally compiled.
(*) fs/nfs/internal.h
Inter-file declarations, plus a few simple utility functions moved from
fs/nfs/inode.c.
Additionally, all the in-.c-file externs have been moved here, and those
files they were moved from now includes this file.
For the most part, the functions have not been changed, only some multiplexor
functions have changed significantly.
I've also:
(*) Added some extra banner comments above some functions.
(*) Rearranged the function order within the files to be more logical and
better grouped (IMO), though someone may prefer a different order.
(*) Reduced the number of #ifdefs in .c files.
(*) Added missing __init and __exit directives.
Signed-Off-By: David Howells <dhowells@redhat.com>
2006-06-09 21:34:33 +08:00
|
|
|
if ((err = register_nfs_fs()) != 0)
|
2005-04-17 06:20:36 +08:00
|
|
|
goto out;
|
|
|
|
return 0;
|
|
|
|
out:
|
|
|
|
#ifdef CONFIG_PROC_FS
|
2011-12-06 21:42:40 +08:00
|
|
|
rpc_proc_unregister(&init_net, "nfs");
|
2005-04-17 06:20:36 +08:00
|
|
|
#endif
|
|
|
|
nfs_destroy_directcache();
|
2005-12-01 07:08:19 +08:00
|
|
|
out0:
|
|
|
|
nfs_destroy_writepagecache();
|
2005-04-17 06:20:36 +08:00
|
|
|
out1:
|
|
|
|
nfs_destroy_readpagecache();
|
|
|
|
out2:
|
|
|
|
nfs_destroy_inodecache();
|
|
|
|
out3:
|
|
|
|
nfs_destroy_nfspagecache();
|
|
|
|
out4:
|
2006-08-23 08:06:13 +08:00
|
|
|
nfs_fs_proc_exit();
|
|
|
|
out5:
|
2008-02-20 09:04:22 +08:00
|
|
|
nfsiod_stop();
|
|
|
|
out6:
|
2009-04-03 23:42:42 +08:00
|
|
|
nfs_fscache_unregister();
|
|
|
|
out7:
|
2011-11-25 22:13:04 +08:00
|
|
|
unregister_pernet_subsys(&nfs_net_ops);
|
2009-08-20 06:12:27 +08:00
|
|
|
out8:
|
2011-11-25 22:13:04 +08:00
|
|
|
nfs_dns_resolver_destroy();
|
2010-09-30 03:41:49 +08:00
|
|
|
out9:
|
2011-11-25 22:13:04 +08:00
|
|
|
nfs_idmap_quit();
|
|
|
|
out10:
|
2005-04-17 06:20:36 +08:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit exit_nfs_fs(void)
|
|
|
|
{
|
|
|
|
nfs_destroy_directcache();
|
|
|
|
nfs_destroy_writepagecache();
|
|
|
|
nfs_destroy_readpagecache();
|
|
|
|
nfs_destroy_inodecache();
|
|
|
|
nfs_destroy_nfspagecache();
|
2009-04-03 23:42:42 +08:00
|
|
|
nfs_fscache_unregister();
|
2011-11-25 22:13:04 +08:00
|
|
|
unregister_pernet_subsys(&nfs_net_ops);
|
2009-08-20 06:12:27 +08:00
|
|
|
nfs_dns_resolver_destroy();
|
2010-09-30 03:41:49 +08:00
|
|
|
nfs_idmap_quit();
|
2005-04-17 06:20:36 +08:00
|
|
|
#ifdef CONFIG_PROC_FS
|
2011-12-06 21:42:40 +08:00
|
|
|
rpc_proc_unregister(&init_net, "nfs");
|
2005-04-17 06:20:36 +08:00
|
|
|
#endif
|
2011-01-06 10:04:30 +08:00
|
|
|
nfs_cleanup_cb_ident_idr();
|
NFS: Split fs/nfs/inode.c
As fs/nfs/inode.c is rather large, heterogenous and unwieldy, the attached
patch splits it up into a number of files:
(*) fs/nfs/inode.c
Strictly inode specific functions.
(*) fs/nfs/super.c
Superblock management functions for NFS and NFS4, normal access, clones
and referrals. The NFS4 superblock functions _could_ move out into a
separate conditionally compiled file, but it's probably not worth it as
there're so many common bits.
(*) fs/nfs/namespace.c
Some namespace-specific functions have been moved here.
(*) fs/nfs/nfs4namespace.c
NFS4-specific namespace functions (this could be merged into the previous
file). This file is conditionally compiled.
(*) fs/nfs/internal.h
Inter-file declarations, plus a few simple utility functions moved from
fs/nfs/inode.c.
Additionally, all the in-.c-file externs have been moved here, and those
files they were moved from now includes this file.
For the most part, the functions have not been changed, only some multiplexor
functions have changed significantly.
I've also:
(*) Added some extra banner comments above some functions.
(*) Rearranged the function order within the files to be more logical and
better grouped (IMO), though someone may prefer a different order.
(*) Reduced the number of #ifdefs in .c files.
(*) Added missing __init and __exit directives.
Signed-Off-By: David Howells <dhowells@redhat.com>
2006-06-09 21:34:33 +08:00
|
|
|
unregister_nfs_fs();
|
2006-08-23 08:06:13 +08:00
|
|
|
nfs_fs_proc_exit();
|
2008-02-20 09:04:22 +08:00
|
|
|
nfsiod_stop();
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Not quite true; I just maintain it */
|
|
|
|
MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
|
|
|
|
MODULE_LICENSE("GPL");
|
2007-10-10 00:01:04 +08:00
|
|
|
module_param(enable_ino64, bool, 0644);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
module_init(init_nfs_fs)
|
|
|
|
module_exit(exit_nfs_fs)
|