GitHub/mt8127/android_kernel_alcatel_ttab.git
15 years ago[S390] wire up sys_perf_counter_open
Heiko Carstens [Fri, 12 Jun 2009 08:26:49 +0000 (10:26 +0200)]
[S390] wire up sys_perf_counter_open

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] wire up sys_rt_tgsigqueueinfo
Heiko Carstens [Fri, 12 Jun 2009 08:26:48 +0000 (10:26 +0200)]
[S390] wire up sys_rt_tgsigqueueinfo

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] ftrace: add system call tracer support
Heiko Carstens [Fri, 12 Jun 2009 08:26:47 +0000 (10:26 +0200)]
[S390] ftrace: add system call tracer support

System call tracer support for s390.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] ftrace: add function graph tracer support
Heiko Carstens [Fri, 12 Jun 2009 08:26:46 +0000 (10:26 +0200)]
[S390] ftrace: add function graph tracer support

Function graph tracer support for s390.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] ftrace: add function trace mcount test support
Heiko Carstens [Fri, 12 Jun 2009 08:26:45 +0000 (10:26 +0200)]
[S390] ftrace: add function trace mcount test support

Add support for early test if the function tracer is enabled or
disabled. Saves some extra function calls.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] ftrace: add dynamic ftrace support
Heiko Carstens [Fri, 12 Jun 2009 08:26:44 +0000 (10:26 +0200)]
[S390] ftrace: add dynamic ftrace support

Dynamic ftrace support for s390.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] kprobes: use probe_kernel_write
Heiko Carstens [Fri, 12 Jun 2009 08:26:43 +0000 (10:26 +0200)]
[S390] kprobes: use probe_kernel_write

Use proble_kernel_write() to patch the kernel.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] maccess: arch specific probe_kernel_write() implementation
Heiko Carstens [Fri, 12 Jun 2009 08:26:42 +0000 (10:26 +0200)]
[S390] maccess: arch specific probe_kernel_write() implementation

Add an s390 specific probe_kernel_write() function which allows to
write to the kernel text segment even if write protection is enabled.
This is implemented using the lra (load real address) and stura (store
using real address) instructions.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] maccess: add weak attribute to probe_kernel_write
Heiko Carstens [Fri, 12 Jun 2009 08:26:41 +0000 (10:26 +0200)]
[S390] maccess: add weak attribute to probe_kernel_write

probe_kernel_write() gets used to write to the kernel address space.
E.g. to patch the kernel (kgdb, ftrace, kprobes...). Some architectures
however enable write protection for the kernel text section, so that
writes to this region would fault.
This patch allows to specify an architecture specific version of
probe_kernel_write() which allows to handle and bypass write protection
of the text segment.
That way it is still possible to catch random writes to kernel text
and explicitly allow writes via this interface.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] profile_tick called twice
Martin Schwidefsky [Fri, 12 Jun 2009 08:26:40 +0000 (10:26 +0200)]
[S390] profile_tick called twice

profile_tick is called twice for every clock comparator interrupt.
The generic clock event code does it in tick_sched_timer and the
s390 backend code in clock_comparator_work. That is one too many,
remove the one in the arch backend code.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] dasd: forward internal errors to dasd_sleep_on caller
Stefan Weinhuber [Fri, 12 Jun 2009 08:26:39 +0000 (10:26 +0200)]
[S390] dasd: forward internal errors to dasd_sleep_on caller

If a DASD requests is started with dasd_sleep_on and fails, then the
calling function may need to know the reason for the failure.
In cases of hardware errors it can inspect the sense data in the irb,
but when the reason is internal (e.g. start_IO failed) then it needs
a meaningfull return code.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] dasd: sync after async probe
Sebastian Ott [Fri, 12 Jun 2009 08:26:38 +0000 (10:26 +0200)]
[S390] dasd: sync after async probe

Some functions called as a late_initcall depend on completely
initialized devices. Since commit
f3445a1a656bc26b07946cc6d20de1ef07c8d116 the dasd driver uses the
new async framework and relies on the fact that synchronization is
done in prepare_namespace which is called after the late_initcalls.

Fix this by calling async_synchronize_full at the end of the related
init functions.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] dasd: check_characteristics cleanup
Sebastian Ott [Fri, 12 Jun 2009 08:26:37 +0000 (10:26 +0200)]
[S390] dasd: check_characteristics cleanup

Fix a broken memset (sizeof pointer vs sizeof the underlying
structure) by cleaning up the involved functions.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] dasd: no High Performance FICON in 31-bit mode
Stefan Weinhuber [Fri, 12 Jun 2009 08:26:36 +0000 (10:26 +0200)]
[S390] dasd: no High Performance FICON in 31-bit mode

The High Performance FICON feature is not supported in 31-bit mode,
no matter what the various flags say. So we need to check for the
CONFIG_64BIT option as well.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] dcssblk: revert devt conversion
Gerald Schaefer [Fri, 12 Jun 2009 08:26:35 +0000 (10:26 +0200)]
[S390] dcssblk: revert devt conversion

git commit f331c0296f2a9fee0d396a70598b954062603015 changed users of
->first_minor to devt. This broke device handling in dcssblk, so that
no additional devices could be added after the first one.

This patch reverts the devt conversion to the previous ->first_minor
handling.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] qdio: fix access beyond ARRAY_SIZE of irq_ptr->{in,out}put_qs
Roel Kluin [Fri, 12 Jun 2009 08:26:34 +0000 (10:26 +0200)]
[S390] qdio: fix access beyond ARRAY_SIZE of irq_ptr->{in,out}put_qs

Do not go beyond ARRAY_SIZE of irq_ptr->{in,out}put_qs

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] vmalloc: add vmalloc kernel parameter support
Heiko Carstens [Fri, 12 Jun 2009 08:26:33 +0000 (10:26 +0200)]
[S390] vmalloc: add vmalloc kernel parameter support

With the kernel parameter 'vmalloc=<size>' the size of the vmalloc area
can be specified. This can be used to increase or decrease the size of
the area. Works in the same way as on some other architectures.
This can be useful for features which make excessive use of vmalloc and
wouldn't work otherwise.
The default sizes remain unchanged: 96MB for 31 bit kernels and 1GB for
64 bit kernels.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] uaccess: use might_fault() instead of might_sleep()
Heiko Carstens [Fri, 12 Jun 2009 08:26:32 +0000 (10:26 +0200)]
[S390] uaccess: use might_fault() instead of might_sleep()

Adds more checking in case lockdep is turned on.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] 3270: lock dependency fixes
Martin Schwidefsky [Fri, 12 Jun 2009 08:26:31 +0000 (10:26 +0200)]
[S390] 3270: lock dependency fixes

Lockdep found a problem with the lock order of the view lock and the
ccw device lock. raw3270_activate_view/raw3270_deactivate_view first
take the ccw device lock then call the activate/deactivate functions
of the view which take view lock. The update functions of the
con3270/tty3270 view will first take the view lock, then take the
ccw device lock. To fix this the activate/deactivate functions are
changed to avoid taking the view lock by moving the functions calls
that modify the 3270 output buffer to the update function which is
called by a timer.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] 3270: do not register with tty_register_device
Martin Schwidefsky [Fri, 12 Jun 2009 08:26:30 +0000 (10:26 +0200)]
[S390] 3270: do not register with tty_register_device

The tty3270_notifier that calls tty_register_device / tty_unregister_device
is harmful in two ways:
1) the device node that is create is wrong because the minor numbers for
   3270 tty start with 1 and tty_notifier passes the minor as index.
2) If 1) is corrected you'll get a warning:
     WARNING: at fs/sysfs/dir.c:462 sysfs_add_one+0x4c/0x60()
     sysfs: duplicate filename '227:1' can not be created
   The 227:1 link is already created by raw3270_create_attributes to refer
   to ../../class/tty/tty<devno>. There cannot be two links.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] qdio: inline qdio_perf_stat_inc
Jan Glauber [Fri, 12 Jun 2009 08:26:29 +0000 (10:26 +0200)]
[S390] qdio: inline qdio_perf_stat_inc

Move qdio_perf_stat_inc to the header file so it can be inlined.
Remove unused qdio_perf_stat_dec.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] qdio: simplify error handling in irq handler
Jan Glauber [Fri, 12 Jun 2009 08:26:28 +0000 (10:26 +0200)]
[S390] qdio: simplify error handling in irq handler

The check for the device status in qdio_establish_handle_irq()
had dead code. Remove the unused code and simplify the error
handling.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] cio: fix sanity checks in device_ops.
Sebastian Ott [Fri, 12 Jun 2009 08:26:27 +0000 (10:26 +0200)]
[S390] cio: fix sanity checks in device_ops.

Some sanity checks in device_ops.c test the output of container_of
macros to be !NULL. Test the input parameters instead.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] secure computing arch backend
Heiko Carstens [Fri, 12 Jun 2009 08:26:26 +0000 (10:26 +0200)]
[S390] secure computing arch backend

Enable secure computing on s390 as well.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] implement is_compat_task
Heiko Carstens [Fri, 12 Jun 2009 08:26:25 +0000 (10:26 +0200)]
[S390] implement is_compat_task

Implement is_compat_task and use it all over the place.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] add mini sclp driver
Heiko Carstens [Fri, 12 Jun 2009 08:26:24 +0000 (10:26 +0200)]
[S390] add mini sclp driver

This adds a mini sclp device driver for very early use. The primary
and probably only use will be to emit a message to the console if the
cpu doesn't provide the minimum required capabilities to run the kernel.
After printing the message a disabled wait will be loaded and the
machine stops operating.
Printing the message is also part of this patch.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] use facility list for cpu type safety check
Martin Schwidefsky [Fri, 12 Jun 2009 08:26:23 +0000 (10:26 +0200)]
[S390] use facility list for cpu type safety check

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] implement interrupt-enabling rwlocks
Heiko Carstens [Fri, 12 Jun 2009 08:26:22 +0000 (10:26 +0200)]
[S390] implement interrupt-enabling rwlocks

arch backend for f5f7eac41db827a47b2163330eecd7bb55ae9f12
"Allow rwlocks to re-enable interrupts".

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] merge cpu.h into cputime.h
Martin Schwidefsky [Fri, 12 Jun 2009 08:26:21 +0000 (10:26 +0200)]
[S390] merge cpu.h into cputime.h

All definition in cpu.h have to do with cputime accounting. Move
them to cputime.h and remove the header file.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years ago[S390] vdso: kernel parameter syntax
Martin Schwidefsky [Fri, 12 Jun 2009 08:26:20 +0000 (10:26 +0200)]
[S390] vdso: kernel parameter syntax

The syntax of the vdso kernel parameter is documented as vdso=[on|off].
The implementation uses vdso=[0|1], an invalid parameter string disables
the vdso support. Fix the mismatch by adding vdso=[on|off] as additional
parameter syntax.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
15 years agoblock: fix kernel-doc in recent block/ changes
Randy Dunlap [Fri, 12 Jun 2009 03:00:41 +0000 (20:00 -0700)]
block: fix kernel-doc in recent block/ changes

Fix kernel-doc warnings in recently changed block/ source code.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
Linus Torvalds [Fri, 12 Jun 2009 03:05:37 +0000 (20:05 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (87 commits)
  nilfs2: get rid of bd_mount_sem use from nilfs
  nilfs2: correct exclusion control in nilfs_remount function
  nilfs2: simplify remaining sget() use
  nilfs2: get rid of sget use for checking if current mount is present
  nilfs2: get rid of sget use for acquiring nilfs object
  nilfs2: remove meaningless EBUSY case from nilfs_get_sb function
  remove the call to ->write_super in __sync_filesystem
  nilfs2: call nilfs2_write_super from nilfs2_sync_fs
  jffs2: call jffs2_write_super from jffs2_sync_fs
  ufs: add ->sync_fs
  sysv: add ->sync_fs
  hfsplus: add ->sync_fs
  hfs: add ->sync_fs
  fat: add ->sync_fs
  ext2: add ->sync_fs
  exofs: add ->sync_fs
  bfs: add ->sync_fs
  affs: add ->sync_fs
  sanitize ->fsync() for affs
  repair bfs_write_inode(), switch bfs to simple_fsync()
  ...

15 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
Linus Torvalds [Fri, 12 Jun 2009 03:05:08 +0000 (20:05 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/gerg/m68knommu

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68knommu: remove unecessary include of thread_info.h in entry.S
  m68knommu: enumerate INIT_THREAD fields properly
  headers_check fix: m68k, swab.h
  arch/m68knommu: Convert #ifdef DEBUG printk(KERN_DEBUG to pr_debug(
  m68knommu: remove obsolete reset code
  m68knommu: move CPU reset code for the 5272 ColdFire into its platform code
  m68knommu: move CPU reset code for the 528x ColdFire into its platform code
  m68knommu: move CPU reset code for the 527x ColdFire into its platform code
  m68knommu: move CPU reset code for the 523x ColdFire into its platform code
  m68knommu: move CPU reset code for the 520x ColdFire into its platform code
  m68knommu: add CPU reset code for the 532x ColdFire
  m68knommu: add CPU reset code for the 5249 ColdFire
  m68knommu: add CPU reset code for the 5206e ColdFire
  m68knommu: add CPU reset code for the 5206 ColdFire
  m68knommu: add CPU reset code for the 5407 ColdFire
  m68knommu: add CPU reset code for the 5307 ColdFire
  m68knommu: merge system reset for code ColdFire 523x family
  m68knommu: fix system reset for ColdFire 527x family

15 years agokvm: remove the duplicated cpumask_clear
Yinghai Lu [Thu, 11 Jun 2009 22:09:00 +0000 (15:09 -0700)]
kvm: remove the duplicated cpumask_clear

zalloc_cpumask_var already cleared it.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agox86: use zalloc_cpumask_var in arch_early_irq_init
Yinghai Lu [Thu, 11 Jun 2009 22:07:48 +0000 (15:07 -0700)]
x86: use zalloc_cpumask_var in arch_early_irq_init

So we make sure MAXSMP gets a cleared cpumask

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoperfcounters: remove powerpc definitions of perf_counter_do_pending
Stephen Rothwell [Fri, 12 Jun 2009 00:14:22 +0000 (10:14 +1000)]
perfcounters: remove powerpc definitions of perf_counter_do_pending

Commit 925d519ab82b6dd7aca9420d809ee83819c08db2 ("perf_counter:
unify and fix delayed counter wakeup") added global definitions.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agonilfs2: get rid of bd_mount_sem use from nilfs
Ryusuke Konishi [Sun, 7 Jun 2009 16:39:33 +0000 (01:39 +0900)]
nilfs2: get rid of bd_mount_sem use from nilfs

This will remove every bd_mount_sem use in nilfs.

The intended exclusion control was replaced by the previous patch
("nilfs2: correct exclusion control in nilfs_remount function") for
nilfs_remount(), and this patch will replace remains with a new mutex
that this inserts in nilfs object.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agonilfs2: correct exclusion control in nilfs_remount function
Ryusuke Konishi [Sun, 7 Jun 2009 16:39:32 +0000 (01:39 +0900)]
nilfs2: correct exclusion control in nilfs_remount function

nilfs_remount() changes mount state of a superblock instance.  Even
though nilfs accesses other superblock instances during mount or
remount, the mount state was not properly protected in
nilfs_remount().

Moreover, nilfs_remount() has a lock order reversal problem;
nilfs_get_sb() holds:

  1. bdev->bd_mount_sem
  2. sb->s_umount  (sget acquires)

and nilfs_remount() holds:

  1. sb->s_umount  (locked by the caller in vfs)
  2. bdev->bd_mount_sem

To avoid these problems, this patch divides a semaphore protecting
super block instances from nilfs->ns_sem, and applies it to the mount
state protection in nilfs_remount().

With this change, bd_mount_sem use is removed from nilfs_remount() and
the lock order reversal will be resolved.  And the new rw-semaphore,
nilfs->ns_super_sem will properly protect the mount state except the
modification from nilfs_error function.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agonilfs2: simplify remaining sget() use
Ryusuke Konishi [Sun, 7 Jun 2009 16:39:31 +0000 (01:39 +0900)]
nilfs2: simplify remaining sget() use

This simplifies the test function passed on the remaining sget()
callsite in nilfs.

Instead of checking mount type (i.e. ro-mount/rw-mount/snapshot mount)
in the test function passed to sget(), this patch first looks up the
nilfs_sb_info struct which the given mount type matches, and then
acquires the super block instance holding the nilfs_sb_info.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agonilfs2: get rid of sget use for checking if current mount is present
Ryusuke Konishi [Sun, 7 Jun 2009 16:39:30 +0000 (01:39 +0900)]
nilfs2: get rid of sget use for checking if current mount is present

This stops using sget() for checking if an r/w-mount or an r/o-mount
exists on the device.  This elimination uses a back pointer to the
current mount added to nilfs object.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agonilfs2: get rid of sget use for acquiring nilfs object
Ryusuke Konishi [Sun, 7 Jun 2009 16:39:29 +0000 (01:39 +0900)]
nilfs2: get rid of sget use for acquiring nilfs object

This will change the way to obtain nilfs object in nilfs_get_sb()
function.

Previously, a preliminary sget() call was performed, and the nilfs
object was acquired from a super block instance found by the sget()
call.

This patch, instead, instroduces a new dedicated function
find_or_create_nilfs(); as the name implies, the function finds an
existent nilfs object from a global list or creates a new one if no
object is found on the device.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agonilfs2: remove meaningless EBUSY case from nilfs_get_sb function
Ryusuke Konishi [Sun, 7 Jun 2009 16:39:28 +0000 (01:39 +0900)]
nilfs2: remove meaningless EBUSY case from nilfs_get_sb function

The following EBUSY case in nilfs_get_sb() is meaningless.  Indeed,
this error code is never returned to the caller.

    if (!s->s_root) {
          ...
    } else if (!(s->s_flags & MS_RDONLY)) {
        err = -EBUSY;
    }

This simply removes the else case.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoremove the call to ->write_super in __sync_filesystem
Christoph Hellwig [Mon, 8 Jun 2009 08:08:54 +0000 (10:08 +0200)]
remove the call to ->write_super in __sync_filesystem

Now that all filesystems provide ->sync_fs methods we can change
__sync_filesystem to only call ->sync_fs.

This gives us a clear separation between periodic writeouts which
are driven by ->write_super and data integrity syncs that go
through ->sync_fs. (modulo file_fsync which is also going away)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agonilfs2: call nilfs2_write_super from nilfs2_sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:08:36 +0000 (10:08 +0200)]
nilfs2: call nilfs2_write_super from nilfs2_sync_fs

The call to ->write_super from __sync_filesystem will go away, so make
sure nilfs2 performs the same actions from inside ->sync_fs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agojffs2: call jffs2_write_super from jffs2_sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:08:21 +0000 (10:08 +0200)]
jffs2: call jffs2_write_super from jffs2_sync_fs

The call to ->write_super from __sync_filesystem will go away, so make
sure jffs2 performs the same actions from inside ->sync_fs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoufs: add ->sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:08:05 +0000 (10:08 +0200)]
ufs: add ->sync_fs

Add a ->sync_fs method for data integrity syncs, and reimplement
->write_super ontop of it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agosysv: add ->sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:07:45 +0000 (10:07 +0200)]
sysv: add ->sync_fs

Add a ->sync_fs method for data integrity syncs, and reimplement
->write_super ontop of it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agohfsplus: add ->sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:05:12 +0000 (10:05 +0200)]
hfsplus: add ->sync_fs

Add a ->sync_fs method for data integrity syncs, and reimplement
->write_super ontop of it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agohfs: add ->sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:04:54 +0000 (10:04 +0200)]
hfs: add ->sync_fs

Add a ->sync_fs method for data integrity syncs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agofat: add ->sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:04:35 +0000 (10:04 +0200)]
fat: add ->sync_fs

Add a ->sync_fs method for data integrity syncs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoext2: add ->sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:04:17 +0000 (10:04 +0200)]
ext2: add ->sync_fs

Add a ->sync_fs method for data integrity syncs, and reimplement
->write_super ontop of it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoexofs: add ->sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:03:58 +0000 (10:03 +0200)]
exofs: add ->sync_fs

Add a ->sync_fs method for data integrity syncs, and reimplement
->write_super ontop of it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agobfs: add ->sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:03:38 +0000 (10:03 +0200)]
bfs: add ->sync_fs

Add a ->sync_fs method for data integrity syncs, and reimplement
->write_super ontop of it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoaffs: add ->sync_fs
Christoph Hellwig [Mon, 8 Jun 2009 08:03:15 +0000 (10:03 +0200)]
affs: add ->sync_fs

Add a ->sync_fs method for data integrity syncs.  Factor out common code
between affs_put_super, affs_write_super and the new affs_sync_fs into
a helper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agosanitize ->fsync() for affs
Al Viro [Mon, 8 Jun 2009 05:22:00 +0000 (01:22 -0400)]
sanitize ->fsync() for affs

unfortunately, for affs (especially for affs directories) we have
no real way to keep track of metadata ownership.  So we have to
do more or less what file_fsync() does, but we do *not* need to
call write_super() there.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agorepair bfs_write_inode(), switch bfs to simple_fsync()
Al Viro [Mon, 8 Jun 2009 05:15:58 +0000 (01:15 -0400)]
repair bfs_write_inode(), switch bfs to simple_fsync()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoFix adfs GET_FRAG_ID() on big-endian
Al Viro [Mon, 8 Jun 2009 04:46:40 +0000 (00:46 -0400)]
Fix adfs GET_FRAG_ID() on big-endian

Missing conversion to host-endian before doing shifts

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agorepair adfs ->write_inode(), switch to simple_fsync()
Al Viro [Mon, 8 Jun 2009 04:44:42 +0000 (00:44 -0400)]
repair adfs ->write_inode(), switch to simple_fsync()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoswitch omfs to simple_fsync()
Al Viro [Sun, 7 Jun 2009 19:44:50 +0000 (15:44 -0400)]
switch omfs to simple_fsync()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoswitch udf to simple_fsync()
Al Viro [Sun, 7 Jun 2009 19:40:27 +0000 (15:40 -0400)]
switch udf to simple_fsync()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoswitch ufs to simple_fsync()
Al Viro [Sun, 7 Jun 2009 19:35:18 +0000 (15:35 -0400)]
switch ufs to simple_fsync()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agorepair sysv_write_inode(), switch sysv to simple_fsync()
Al Viro [Sun, 7 Jun 2009 19:29:45 +0000 (15:29 -0400)]
repair sysv_write_inode(), switch sysv to simple_fsync()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoswitch minix to simple_fsync()
Al Viro [Sun, 7 Jun 2009 19:21:06 +0000 (15:21 -0400)]
switch minix to simple_fsync()

* get minix_write_inode() to honour the second argument
* now we can use simple_fsync() for minixfs

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoswitch ext2 to simple_fsync()
Al Viro [Sun, 7 Jun 2009 19:14:02 +0000 (15:14 -0400)]
switch ext2 to simple_fsync()

kill ext2_sync_file() (along with ext2/fsync.c), get rid of
ext2_update_inode() - it's an alias of ext2_write_inode().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoSanitize ->fsync() for FAT
Al Viro [Sun, 7 Jun 2009 17:44:36 +0000 (13:44 -0400)]
Sanitize ->fsync() for FAT

* mark directory data blocks as assoc. metadata
* add new inode to deal with FAT, mark FAT blocks as assoc. metadata of that
* now ->fsync() is trivial both for files and directories

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agofs/qnx4: sanitize includes
Al Viro [Sun, 7 Jun 2009 13:47:13 +0000 (09:47 -0400)]
fs/qnx4: sanitize includes

fs-internal parts of qnx4_fs.h taken to fs/qnx4/qnx4.h, includes adjusted,
qnx4_fs.h doesn't need unifdef anymore.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoSanitize qnx4 fsync handling
Al Viro [Sun, 7 Jun 2009 13:30:08 +0000 (09:30 -0400)]
Sanitize qnx4 fsync handling

* have directory operations use mark_buffer_dirty_inode(),
  so that sync_mapping_buffers() would get those.
* make qnx4_write_inode() honour its last argument.
* get rid of insane copies of very ancient "walk the indirect blocks"
  in qnx4/fsync - they never matched the actual fs layout and, fortunately,
  never'd been called.  Again, all this junk is not needed; ->fsync()
  should just do sync_mapping_buffers + sync_inode (and if we implement
  block allocation for qnx4, we'll need to use mark_buffer_dirty_inode()
  for extent blocks)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoNew helper - simple_fsync()
Al Viro [Sun, 7 Jun 2009 18:56:44 +0000 (14:56 -0400)]
New helper - simple_fsync()

writes associated buffers, then does sync_inode() to write
the inode itself (and to make it clean).  Depends on
->write_inode() honouring the second argument.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoPush BKL down into ->remount_fs()
Alessio Igor Bogani [Tue, 12 May 2009 13:10:54 +0000 (15:10 +0200)]
Push BKL down into ->remount_fs()

[xfs, btrfs, capifs, shmem don't need BKL, exempt]

Signed-off-by: Alessio Igor Bogani <abogani@texware.it>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agofs: block_dump missing dentry locking
Nick Piggin [Thu, 28 May 2009 07:01:15 +0000 (09:01 +0200)]
fs: block_dump missing dentry locking

I think the block_dump output in __mark_inode_dirty is missing dentry locking.
Surely the i_dentry list can change any time, so we may not even *get* a
dentry there. If we do get one by chance, then it would appear to be able to
go away or get renamed at any time...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agofs: remove incorrect I_NEW warnings
Nick Piggin [Tue, 2 Jun 2009 10:07:47 +0000 (12:07 +0200)]
fs: remove incorrect I_NEW warnings

Some filesystems can call in to sync an inode that is still in the
I_NEW state (eg. ext family, when mounted with -osync). This is OK
because the filesystem has sole access to the new inode, so it can
modify i_state without races (because no other thread should be
modifying it, by definition of I_NEW). Ie. a false positive, so
remove the warnings.

The races are described here 7ef0d7377cb287e08f3ae94cebc919448e1f5dff,
which is also where the warnings were introduced.

Reported-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agolinux/magic.h: move cramfs magic out of cramfs_fs.h
Mike Frysinger [Tue, 26 May 2009 09:45:04 +0000 (05:45 -0400)]
linux/magic.h: move cramfs magic out of cramfs_fs.h

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
CC: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoxfs: remove ->write_super and stop maintaining ->s_dirt
Christoph Hellwig [Fri, 5 Jun 2009 10:26:23 +0000 (12:26 +0200)]
xfs: remove ->write_super and stop maintaining ->s_dirt

the write_super method is used for

 (1) writing back the superblock periodically from pdflush
 (2) called just before ->sync_fs for data integerity syncs

We don't need (1) because we have our own peridoc writeout through xfssyncd,
and we don't need (2) because xfs_fs_sync_fs performs a proper synchronous
superblock writeout after all other data and metadata has been written out.

Also remove ->s_dirt tracking as it's only used to decide when too call
->write_super.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agontfs: remove old debug check for dirty data in ntfs_put_super()
Jens Axboe [Mon, 25 May 2009 07:30:45 +0000 (09:30 +0200)]
ntfs: remove old debug check for dirty data in ntfs_put_super()

This should not trigger anymore, so kill it.

Acked-by: Anton Altaparmakov <aia21@cam.ac.uk>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agofs: Rearrange inode structure elements to avoid waste due to padding
Theodore Ts'o [Thu, 21 May 2009 20:01:02 +0000 (16:01 -0400)]
fs: Rearrange inode structure elements to avoid waste due to padding

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agofs: Remove i_cindex from struct inode
Theodore Ts'o [Thu, 21 May 2009 20:01:00 +0000 (16:01 -0400)]
fs: Remove i_cindex from struct inode

The only user of the i_cindex element in the inode structure is used
is by the firewire drivers.  As part of an attempt to slim down the
inode structure to save memory --- since a typical Linux system will
have hundreds of thousands if not millions of inodes cached, a
reduction in the size inode has high leverage.

The firewire driver does not need i_cindex in any fast path, so it's
simple enough to calculate when it is needed, instead of wasting space
in the inode structure.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: krh@redhat.com
Cc: stefanr@s5r6.in-berlin.de
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years ago->write_super lock_super pushdown
Christoph Hellwig [Mon, 11 May 2009 21:35:03 +0000 (23:35 +0200)]
->write_super lock_super pushdown

Push down lock_super into ->write_super instances and remove it from the
caller.

Following filesystem don't need ->s_lock in ->write_super and are skipped:

 * bfs, nilfs2 - no other uses of s_lock and have internal locks in
->write_super
 * ext2 - uses BKL in ext2_write_super and has internal calls without s_lock
 * reiserfs - no other uses of s_lock as has reiserfs_write_lock (BKL) in
  ->write_super
 * xfs - no other uses of s_lock and uses internal lock (buffer lock on
superblock buffer) to serialize ->write_super.  Also xfs_fs_write_super
is superflous and will go away in the next merge window

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agojffs2: move jffs2_write_super to super.c
Christoph Hellwig [Mon, 11 May 2009 21:34:27 +0000 (23:34 +0200)]
jffs2: move jffs2_write_super to super.c

jffs2_write_super is only called from super.c and doesn't use any
functionality from fs.c.  So move it over to super.c and make it
static there.

[should go in through the vfs tree as it is a requirement for the
 next patch]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoPush BKL down into do_remount_sb()
Al Viro [Fri, 8 May 2009 17:36:58 +0000 (13:36 -0400)]
Push BKL down into do_remount_sb()

[folded fix from Jiri Slaby]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoPush BKL down beyond VFS-only parts of do_mount()
Al Viro [Fri, 8 May 2009 17:34:06 +0000 (13:34 -0400)]
Push BKL down beyond VFS-only parts of do_mount()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoPush BKL into do_mount()
Al Viro [Fri, 8 May 2009 17:31:17 +0000 (13:31 -0400)]
Push BKL into do_mount()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoPush lock_super() into the ->remount_fs() of filesystems that care about it
Al Viro [Wed, 6 May 2009 14:43:07 +0000 (10:43 -0400)]
Push lock_super() into the ->remount_fs() of filesystems that care about it

Note that since we can't run into contention between remount_fs and write_super
(due to exclusion on s_umount), we have to care only about filesystems that
touch lock_super() on their own.  Out of those ext3, ext4, hpfs, sysv and ufs
do need it; fat doesn't since its ->remount_fs() only accesses assign-once
data (basically, it's "we have no atime on directories and only have atime on
files for vfat; force nodiratime and possibly noatime into *flags").

[folded a build fix from hch]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agopush BKL down into ->put_super
Christoph Hellwig [Tue, 5 May 2009 13:40:36 +0000 (15:40 +0200)]
push BKL down into ->put_super

Move BKL into ->put_super from the only caller.  A couple of
filesystems had trivial enough ->put_super (only kfree and NULLing of
s_fs_info + stuff in there) to not get any locking: coda, cramfs, efs,
hugetlbfs, omfs, qnx4, shmem, all others got the full treatment.  Most
of them probably don't need it, but I'd rather sort that out individually.
Preferably after all the other BKL pushdowns in that area.

[AV: original used to move lock_super() down as well; these changes are
removed since we don't do lock_super() at all in generic_shutdown_super()
now]
[AV: fuse, btrfs and xfs are known to need no damn BKL, exempt]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoNo need to do lock_super() for exclusion in generic_shutdown_super()
Al Viro [Wed, 6 May 2009 02:10:44 +0000 (22:10 -0400)]
No need to do lock_super() for exclusion in generic_shutdown_super()

We can't run into contention on it.  All other callers of lock_super()
either hold s_umount (and we have it exclusive) or hold an active
reference to superblock in question, which prevents the call of
generic_shutdown_super() while the reference is held.  So we can
replace lock_super(s) with get_fs_excl() in generic_shutdown_super()
(and corresponding change for unlock_super(), of course).

Since ext4 expects s_lock held for its put_super, take lock_super()
into it.  The rest of filesystems do not care at all.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoTrim a bit of crap from fs.h
Al Viro [Thu, 7 May 2009 07:12:29 +0000 (03:12 -0400)]
Trim a bit of crap from fs.h

do_remount_sb() is fs/internal.h fodder, fsync_no_super() is long gone.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoMake sure that all callers of remount hold s_umount exclusive
Al Viro [Wed, 6 May 2009 03:48:50 +0000 (23:48 -0400)]
Make sure that all callers of remount hold s_umount exclusive

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoenforce ->sync_fs is only called for rw superblock
Christoph Hellwig [Tue, 5 May 2009 13:41:25 +0000 (15:41 +0200)]
enforce ->sync_fs is only called for rw superblock

Make sure a superblock really is writeable by checking MS_RDONLY
under s_umount.  sync_filesystems needed some re-arragement for
that, but all but one sync_filesystem caller had the correct locking
already so that we could add that check there.  cachefiles grew
s_umount locking.

I've also added a WARN_ON to sync_filesystem to assert this for
future callers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agocleanup sync_supers
Christoph Hellwig [Tue, 5 May 2009 14:08:56 +0000 (16:08 +0200)]
cleanup sync_supers

Merge the write_super helper into sync_super and move the check for
->write_super earlier so that we can avoid grabbing a reference to
a superblock that doesn't have it.

While we're at it also add a little comment documenting sync_supers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agodcache: extrace and use d_unlinked()
Alexey Dobriyan [Sun, 3 May 2009 23:32:03 +0000 (03:32 +0400)]
dcache: extrace and use d_unlinked()

d_unlinked() will be used in middle-term to ban checkpointing when opened
but unlinked file is detected, and in long term, to detect such situation
and special case on it.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoremove ->write_super call in generic_shutdown_super
Christoph Hellwig [Tue, 28 Apr 2009 16:00:26 +0000 (18:00 +0200)]
remove ->write_super call in generic_shutdown_super

We just did a full fs writeout using sync_filesystem before, and if
that's not enough for the filesystem it can perform it's own writeout
in ->put_super, which many filesystems already do.

Move a call to foofs_write_super into every foofs_put_super for now to
guarantee identical behaviour until it's cleaned up by the individual
filesystem maintainers.

Exceptions:

 - affs already has identical copy & pasted code at the beginning of
   affs_put_super so no need to do it twice.
 - xfs does the right thing without it and I have changes pending for
   the xfs tree touching this are so I don't really need conflicts
   here..

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoqnx4: remove ->write_super
Christoph Hellwig [Mon, 27 Apr 2009 13:46:45 +0000 (09:46 -0400)]
qnx4: remove ->write_super

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoocfs2: remove ->write_super and stop maintaining ->s_dirt
Christoph Hellwig [Mon, 27 Apr 2009 13:46:44 +0000 (09:46 -0400)]
ocfs2: remove ->write_super and stop maintaining ->s_dirt

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agogfs2: remove ->write_super and stop maintaining ->s_dirt
Christoph Hellwig [Mon, 27 Apr 2009 13:46:43 +0000 (09:46 -0400)]
gfs2: remove ->write_super and stop maintaining ->s_dirt

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoext3: remove ->write_super and stop maintaining ->s_dirt
Christoph Hellwig [Mon, 27 Apr 2009 13:46:42 +0000 (09:46 -0400)]
ext3: remove ->write_super and stop maintaining ->s_dirt

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agobtrfs: remove ->write_super and stop maintaining ->s_dirt
Christoph Hellwig [Mon, 27 Apr 2009 13:46:41 +0000 (09:46 -0400)]
btrfs: remove ->write_super and stop maintaining ->s_dirt

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoquota: Introduce writeout_quota_sb() (version 4)
Jan Kara [Mon, 27 Apr 2009 14:43:55 +0000 (16:43 +0200)]
quota: Introduce writeout_quota_sb() (version 4)

Introduce this function which just writes all the quota structures but
avoids all the syncing and cache pruning work to expose quota structures
to userspace. Use this function from __sync_filesystem when wait == 0.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agoquota: cleanup dquota sync functions (version 4)
Christoph Hellwig [Mon, 27 Apr 2009 14:43:54 +0000 (16:43 +0200)]
quota: cleanup dquota sync functions (version 4)

Currently the VFS calls vfs_dq_sync to sync out disk quotas for a given
superblock.  This is a small wrapper around sync_dquots which for the
case of a non-NULL superblock is a small wrapper around quota_sync_sb.

Just make quota_sync_sb global (rename it to sync_quota_sb) and call it
directly.  Also call it directly for those cases in quota.c that have a
superblock and leave sync_dquots purely an iterator over sync_quota_sb and
remove it's superblock argument.

To make this nicer move the check for the lack of a quota_sync method
from the callers into sync_quota_sb.

[folded build fix from Alexander Beregalov <a.beregalov@gmail.com>]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agovfs: Rename fsync_super() to sync_filesystem() (version 4)
Jan Kara [Mon, 27 Apr 2009 14:43:53 +0000 (16:43 +0200)]
vfs: Rename fsync_super() to sync_filesystem() (version 4)

Rename the function so that it better describe what it really does. Also
remove the unnecessary include of buffer_head.h.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agovfs: Move syncing code from super.c to sync.c (version 4)
Jan Kara [Mon, 27 Apr 2009 14:43:52 +0000 (16:43 +0200)]
vfs: Move syncing code from super.c to sync.c (version 4)

Move sync_filesystems(), __fsync_super(), fsync_super() from
super.c to sync.c where it fits better.

[build fixes folded]

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
15 years agovfs: Make sys_sync() use fsync_super() (version 4)
Jan Kara [Mon, 27 Apr 2009 14:43:51 +0000 (16:43 +0200)]
vfs: Make sys_sync() use fsync_super() (version 4)

It is unnecessarily fragile to have two places (fsync_super() and do_sync())
doing data integrity sync of the filesystem. Alter __fsync_super() to
accommodate needs of both callers and use it. So after this patch
__fsync_super() is the only place where we gather all the calls needed to
properly send all data on a filesystem to disk.

Nice bonus is that we get a complete livelock avoidance and write_supers()
is now only used for periodic writeback of superblocks.

sync_blockdevs() introduced a couple of patches ago is gone now.

[build fixes folded]

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>