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  1. 26 Jan, 2008 15 commits
  3. 25 Jan, 2008 25 commits
    • Mark Fasheh's avatar
      ocfs2: clean up bh null checks · 2fe5c1d7
      Mark Fasheh authored 
      If we know a buffer_head is non-null, then brelse() is unnecessary and
put_bh() can be used instead. Also, an explicit check for NULL is
unnecessary when using brelse(). This patch only covers buffer_head_io.c and
resize.c, which have recently added code which exhibits this problem.
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      2fe5c1d7
    • Mark Fasheh's avatar
      ocfs2: document access rules for blocked_lock_list · 7ec373cf
      Mark Fasheh authored 
      ocfs2_super->blocked_lock_list and ocfs2_super->blocked_lock_count have some
usage restrictions which aren't immediately obvious to anyone reading the
code. It's a good idea to document this so that we avoid making costly
mistakes in the future.
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      7ec373cf
    • Joonwoo Park's avatar
      configfs: file.c fix possible recursive locking · 116ba5d5
      Joonwoo Park authored 
      configfs_register_subsystem() with default_groups triggers recursive locking.
it seems that mutex_lock_nested is needed.

=============================================
[ INFO: possible recursive locking detected ]
2.6.24-rc6 #145
---------------------------------------------
swapper/1 is trying to acquire lock:
 (&sb->s_type->i_mutex_key#3){--..}, at: [<c40c9a9e>] configfs_add_file+0x2e/0x70

but task is already holding lock:
 (&sb->s_type->i_mutex_key#3){--..}, at: [<c40ca985>] configfs_register_subsystem+0x55/0x130

other info that might help us debug this:
1 lock held by swapper/1:
 #0:  (&sb->s_type->i_mutex_key#3){--..}, at: [<c40ca985>] configfs_register_subsystem+0x55/0x130

stack backtrace:
Pid: 1, comm: swapper Not tainted 2.6.24-rc6 #145
 [<c40053ba>] show_trace_log_lvl+0x1a/0x30
 [<c4005e82>] show_trace+0x12/0x20
 [<c400687e>] dump_stack+0x6e/0x80
 [<c404ec72>] __lock_acquire+0xe62/0x1120
 [<c404efb2>] lock_acquire+0x82/0xa0
 [<c43fda88>] mutex_lock_nested+0x98/0x2e0
 [<c40c9a9e>] configfs_add_file+0x2e/0x70
 [<c40c9b0c>] configfs_create_file+0x2c/0x40
 [<c40ca639>] configfs_attach_item+0x139/0x220
 [<c40ca734>] configfs_attach_group+0x14/0x140
 [<c40ca7e9>] configfs_attach_group+0xc9/0x140
 [<c40ca9f6>] configfs_register_subsystem+0xc6/0x130
 [<c45c8186>] init_netconsole+0x2b6/0x300
 [<c45a75f2>] kernel_init+0x142/0x320
 [<c4004fb3>] kernel_thread_helper+0x7/0x14
 =======================
Signed-off-by: default avatarJoonwoo Park <joonwpark81@gmail.com>
Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      116ba5d5
    • Joonwoo Park's avatar
      configfs: dir.c fix possible recursive locking · ba611edf
      Joonwoo Park authored 
      configfs_register_subsystem() with default_groups triggers recursive locking.
it seems that mutex_lock_nested is needed.

=============================================
[ INFO: possible recursive locking detected ]
2.6.24-rc6 #141
---------------------------------------------
swapper/1 is trying to acquire lock:
 (&sb->s_type->i_mutex_key#3){--..}, at: [<c40ca76f>] configfs_attach_group+0x4f/0x190

but task is already holding lock:
 (&sb->s_type->i_mutex_key#3){--..}, at: [<c40ca9d5>] configfs_register_subsystem+0x55/0x130

other info that might help us debug this:
1 lock held by swapper/1:
 #0:  (&sb->s_type->i_mutex_key#3){--..}, at: [<c40ca9d5>] configfs_register_subsystem+0x55/0x130

stack backtrace:
Pid: 1, comm: swapper Not tainted 2.6.24-rc6 #141
 [<c40053ba>] show_trace_log_lvl+0x1a/0x30
 [<c4005e82>] show_trace+0x12/0x20
 [<c400687e>] dump_stack+0x6e/0x80
 [<c404ec72>] __lock_acquire+0xe62/0x1120
 [<c404efb2>] lock_acquire+0x82/0xa0
 [<c43fdad8>] mutex_lock_nested+0x98/0x2e0
 [<c40ca76f>] configfs_attach_group+0x4f/0x190
 [<c40caa46>] configfs_register_subsystem+0xc6/0x130
 [<c45c8186>] init_netconsole+0x2b6/0x300
 [<c45a75f2>] kernel_init+0x142/0x320
 [<c4004fb3>] kernel_thread_helper+0x7/0x14
 =======================
Signed-off-by: default avatarJoonwoo Park <joonwpark81@gmail.com>
Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      ba611edf
    • Joel Becker's avatar
      configfs: Remove EXPERIMENTAL · 02ac0499
      Joel Becker authored 
      configfs has been alive and kicking for a while now.  It underpins some
non-EXPERIMENTAL subsystems, such as OCFS2's cluster stack.
Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      02ac0499
    • Mark Fasheh's avatar
      ocfs2: bump version number · 0e5ae032
      Mark Fasheh authored 
      Bump the printed version to 1.5.0. This helps us quickly identify which
version of Ocfs2 a bug filer is running.
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      0e5ae032
    • Tao Ma's avatar
      ocfs2/dlm: Clear joining_node on hearbeat node down · 2d4b1cbb
      Tao Ma authored 
      Currently the process of dlm join contains 2 steps: query join and assert join.
After query join, the joined node will set its joining_node. So if the joining
node happens to panic before the 2nd step, the joined node will fail to clear
its joining_node flag because that node isn't in the domain map. It at least
cause 2 problems.
1. All the new join request will fail. So no new node can mount the volume.
2. The joined node can't umount the volume since during the umount process it
   has to wait for the joining_node to be unknown. So the umount will be hanged.

The solution is to clear the joining_node before we check the domain map.
Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      2d4b1cbb
    • Marcin Slusarz's avatar
      ocfs2: convert byte order of constant instead of variable · 4092d49f
      Marcin Slusarz authored 
      Convert byte order of constant instead of variable it will be done at
compile time vs run time. Remove unused le32_and_cpu.
Signed-off-by: default avatarMarcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      4092d49f
    • Sunil Mushran's avatar
      ocfs2: Update default cluster timeouts · 17104683
      Sunil Mushran authored 
      Lots of people are having trouble with the default timeouts, which are too
low. These new values are derived from an informal survey taken on
ocfs2-users, as well as data from bug reports. This should reduce the amount
of cluster disconnects and subsequent fencing seen during normal workloads.
Signed-off-by: default avatarSunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      17104683
    • Jan Kara's avatar
      ocfs2: printf fixes · 634bf74d
      Jan Kara authored 
      Explicitely convert loff_t to long long in printf. Just for sure...
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      634bf74d
    • Jan Kara's avatar
      ocfs2: Use generic_file_llseek · 32c3c0e2
      Jan Kara authored 
      We should use generic_file_llseek() and not default_llseek() so that
s_maxbytes gets properly checked when seeking.
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      32c3c0e2
    • Jan Kara's avatar
      ocfs2: Safer read_inline_data() · d2849fb2
      Jan Kara authored 
      In ocfs2_read_inline_data() we should store file size in loff_t. Although
the file size should fit in 32 bits we cannot be sure in case filesystem is
corrupted.
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      d2849fb2
    • Jan Kara's avatar
      ocfs2: Silence false lockdep warnings · 5fa0613e
      Jan Kara authored 
      Create separate lockdep lock classes for system file's i_mutexes. They are
used to guard allocations and similar things and thus rank differently
than i_mutex of a regular file or directory.
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      5fa0613e
    • Mark Fasheh's avatar
      [PATCH 2/2] ocfs2: cluster aware flock() · 53fc622b
      Mark Fasheh authored 
      Hook up ocfs2_flock(), using the new flock lock type in dlmglue.c. A new
mount option, "localflocks" is added so that users can revert to old
functionality as need be.
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      53fc622b
    • Mark Fasheh's avatar
      [PATCH 1/2] ocfs2: add flock lock type · cf8e06f1
      Mark Fasheh authored 
      This adds a new dlmglue lock type which is intended to back flock()
requests.

Since these locks are driven from userspace, usage rules are much more
liberal than the typical Ocfs2 internal cluster lock. As a result, we can't
make use of most dlmglue features - lock caching and lock level
optimizations in particular. Additionally, userspace is free to deadlock
itself, so we have to deal with that in the same way as the rest of the
kernel - by allowing a signal to abort a lock request.

In order to keep ocfs2_cluster_lock() complexity down, ocfs2_file_lock()
does it's own dlm coordination. We still use the same helper functions
though, so duplicated code is kept to a minimum.
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      cf8e06f1
    • Sunil Mushran's avatar
      ocfs2: Local alloc window size changeable via mount option · 2fbe8d1e
      Sunil Mushran authored 
      Local alloc is a performance optimization in ocfs2 in which a node
takes a window of bits from the global bitmap and then uses that for
all small local allocations. This window size is fixed to 8MB currently.
This patch allows users to specify the window size in MB including
disabling it by passing in 0. If the number specified is too large,
the fs will use the default value of 8MB.

mount -o localalloc=X /dev/sdX /mntpoint
Signed-off-by: default avatarSunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      2fbe8d1e
    • Mark Fasheh's avatar
      ocfs2: Support commit= mount option · d147b3d6
      Mark Fasheh authored 
      Mostly taken from ext3. This allows the user to set the jbd commit interval,
in seconds. The default of 5 seconds stays the same, but now users can
easily increase the commit interval. Typically, this would be increased in
order to benefit performance at the expense of data-safety.
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      d147b3d6
    • Mark Fasheh's avatar
      ocfs2: Add missing permission checks · 0957f007
      Mark Fasheh authored 
      Check that an online resize is being driven by a user with permission to
change system resource limits.
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      0957f007
    • Tao Ma's avatar
      [PATCH 2/2] ocfs2: Implement group add for online resize · 7909f2bf
      Tao Ma authored 
      This patch adds the ability for a userspace program to request that a
properly formatted cluster group be added to the main allocation bitmap for
an Ocfs2 file system. The request is made via an ioctl, OCFS2_IOC_GROUP_ADD.
On a high level, this is similar to ext3, but we use a different ioctl as
the structure which has to be passed through is different.

During an online resize, tunefs.ocfs2 will format any new cluster groups
which must be added to complete the resize, and call OCFS2_IOC_GROUP_ADD on
each one. Kernel verifies that the core cluster group information is valid
and then does the work of linking it into the global allocation bitmap.
Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      7909f2bf
    • Tao Ma's avatar
      [PATCH 1/2] ocfs2: Add group extend for online resize · d659072f
      Tao Ma authored 
      This patch adds the ability for a userspace program to request an extend of
last cluster group on an Ocfs2 file system. The request is made via ioctl,
OCFS2_IOC_GROUP_EXTEND. This is derived from EXT3_IOC_GROUP_EXTEND, but is
obviously Ocfs2 specific.

tunefs.ocfs2 would call this for an online-resize operation if the last
cluster group isn't full.
Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      d659072f
    • Hans de Goede's avatar
      [SCSI] usbstorage: use last_sector_bug flag universally · 23c3e290
      Hans de Goede authored 
      This patch sets the last_sector_bug flag to 1 for all USB disks. This is
needed to makes the cardreader on various HP multifunction printers work.

Since the performance impact is negible we set this flag for all USB disks to
avoid an unusual_devs.h nightmare.
Signed-off-by: default avatarHans de Goede <j.w.r.degoede@hhs.nl>
Acked-by: default avatarMatthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
      23c3e290
    • Tao Ma's avatar
      ocfs2: Reserve ioctl range · 7f68fc28
      Tao Ma authored 
      We need to reserve at least two ioctls for online-resize. Reserve a small
range of ioctls for Ocfs2 use in Documentation/ioctl-number.txt. This should
give us enough room for future growth.
Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      7f68fc28
    • Tao Ma's avatar
      ocfs2: Initalize bitmap_cpg of ocfs2_super to be the maximum. · e9d578a8
      Tao Ma authored 
      This value is initialized from global_bitmap->id2.i_chain.cl_cpg. If there
is only 1 group, it will be equal to the total clusters in the volume. So
as for online resize, it should change for all the nodes in the cluster.
It isn't easy and there is no corresponding lock for it.

bitmap_cpg is only used in 2 areas:
1. Check whether the suballoc is too large for us to allocate from the global
   bitmap, so it is little used. And now the suballoc size is 2048, it rarely
   meet this situation and the check is almost useless.
2. Calculate which group a cluster belongs to. We use it during truncate to
   figure out which cluster group an extent belongs too. But we should be OK
   if we increase it though as the cluster group calculated shouldn't change
   and we only ever have a small bitmap_cpg on file systems with a single
   cluster group.
Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      e9d578a8
    • Herbert Xu's avatar
      [CRYPTO] hifn795x: Disallow built-in hifn795x when HW_RANDOM is m · 946fef4e
      Herbert Xu authored 
      Currently it is possible to select HW_RANDOM as a module and have
hifn795x built-in.  This causes a build problem because hifn795x
will then call hwrng_register which isn't built-in.

This patch introduces a new config option to control the hifn795x
RNG which lets us avoid this problem.
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
      946fef4e
    • Mark Fasheh's avatar
      ocfs2: Documentation update · 1252c434
      Mark Fasheh authored 
      Remove 'readpages' from the list in ocfs2.txt. Instead of having two
identical lists, I just removed the list in the OCFS2 section of fs/Kconfig
and added a pointer to Documentation/filesystems/ocfs2.txt.
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
      1252c434
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