Chris Mason [Wed, 1 Feb 2012 01:19:02 +0000 (20:19 -0500)]
Btrfs: don't use crc items bigger than 4KB
With the big metadata blocks, we can have crc items
that are much bigger than a page. There are a few
places that we try to kmalloc memory to hold the
items during a split.
Items bigger than 4KB don't really have a huge benefit
in efficiency, but they do trigger larger order allocations.
This commits changes the csums to make sure they stay under
4KB. This is not a format change, just a #define to limit
huge items.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Chris Mason [Tue, 27 Mar 2012 22:56:56 +0000 (18:56 -0400)]
Btrfs: flush out and clean up any block device pages during mount
Btrfs puts the filesystem metadata into its own address space, and
somehow the block device address space isn't getting onto disk properly
before a mount. The end result is that a loop of mkfs and mounting the
filesystem will sometimes find stale or incorrect data.
This commit should fix it by sprinkling fdatawrites and invalidate_bdev
calls around. This is a short term measure to make sure it is fixed.
The block devices really should be flushed and cleaned up higher in the
stack.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Chris Mason [Thu, 29 Mar 2012 00:33:40 +0000 (20:33 -0400)]
Merge git://git.jan-o-sch.net/btrfs-unstable into for-linus
Conflicts:
fs/btrfs/transaction.c
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Chris Mason [Thu, 29 Mar 2012 00:32:46 +0000 (20:32 -0400)]
Merge branch 'for-chris' of git://github.com/idryomov/btrfs-unstable into for-linus
Chris Mason [Thu, 29 Mar 2012 00:31:37 +0000 (20:31 -0400)]
Merge branch 'error-handling' into for-linus
Conflicts:
fs/btrfs/ctree.c
fs/btrfs/disk-io.c
fs/btrfs/extent-tree.c
fs/btrfs/extent_io.c
fs/btrfs/extent_io.h
fs/btrfs/inode.c
fs/btrfs/scrub.c
Signed-off-by: Chris Mason <chris.mason@oracle.com>
David Sterba [Fri, 17 Feb 2012 11:26:09 +0000 (12:26 +0100)]
btrfs: disallow unequal data/metadata blocksize for mixed block groups
With support for bigger metadata blocks, we must avoid mounting a
filesystem with different block size for mixed block groups, this causes
corruption (found by xfstests/083).
Signed-off-by: David Sterba <dsterba@suse.cz>
David Sterba [Mon, 5 Mar 2012 23:06:18 +0000 (00:06 +0100)]
Btrfs: enhance superblock sanity checks
Validate checksum algorithm during mount and prevent BUG_ON later in
btrfs_super_csum_size.
Signed-off-by: David Sterba <dsterba@suse.cz>
Stefan Behrens [Tue, 27 Mar 2012 18:21:27 +0000 (14:21 -0400)]
Btrfs: change scrub to support big blocks
Scrub used to be coded for nodesize == leafsize == sectorsize == PAGE_SIZE.
This is now changed to support sizes for nodesize and leafsize which are
N * PAGE_SIZE.
Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Stefan Behrens [Tue, 27 Mar 2012 18:21:26 +0000 (14:21 -0400)]
Btrfs: minor cleanup in scrub
Just a minor cleanup commit in preparation for the big block changes.
Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Stefan Behrens [Tue, 27 Mar 2012 18:21:26 +0000 (14:21 -0400)]
Btrfs: introduce common define for max number of mirrors
Readahead already has a define for the max number of mirrors. Scrub
needs such a define now, the rest of the code will need something
like this soon. Therefore the define was added to ctree.h and removed
from the readahead code.
Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:18 +0000 (17:09 +0300)]
Btrfs: fix infinite loop in btrfs_shrink_device()
If relocate of block group 0 fails with ENOSPC we end up infinitely
looping because key.offset -= 1 statement in that case brings us back to
where we started.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:18 +0000 (17:09 +0300)]
Btrfs: fix memory leak in resolver code
init_ipath() allocates btrfs_data_container which is never freed. Free
it in free_ipath() and nuke the comment for init_data_container() - we
can safely free it with kfree().
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:17 +0000 (17:09 +0300)]
Btrfs: allow dup for data chunks in mixed mode
Generally we don't allow dup for data, but mixed chunks are special and
people seem to think this has its use cases.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:17 +0000 (17:09 +0300)]
Btrfs: validate target profiles only if we are going to use them
Do not run sanity checks on all target profiles unless they all will be
used. This came up because alloc_profile_is_valid() is now more strict
than it used to be.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:17 +0000 (17:09 +0300)]
Btrfs: improve the logic in btrfs_can_relocate()
Currently if we don't have enough space allocated we go ahead and loop
though devices in the hopes of finding enough space for a chunk of the
*same* type as the one we are trying to relocate. The problem with that
is that if we are trying to restripe the chunk its target type can be
more relaxed than the current one (eg require less devices or less
space). So, when restriping, run checks against the target profile
instead of the current one.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:17 +0000 (17:09 +0300)]
Btrfs: add __get_block_group_index() helper
Add __get_block_group_index() helper to be able to derive block group
index from an arbitary set of flags. Implement get_block_group_index()
in terms of it.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:17 +0000 (17:09 +0300)]
Btrfs: add get_restripe_target() helper
Add get_restripe_target() helper and switch everybody to use it.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:17 +0000 (17:09 +0300)]
Btrfs: move alloc_profile_is_valid() to volumes.c
Header file is not a good place to define functions. This also moves a
call to alloc_profile_is_valid() down the stack and removes a redundant
check from __btrfs_alloc_chunk() - alloc_profile_is_valid() takes it
into account.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:17 +0000 (17:09 +0300)]
Btrfs: make profile_is_valid() check more strict
"0" is a valid value for an on-disk chunk profile, but it is not a valid
extended profile. (We have a separate bit for single chunks in extended
case)
Also rename it to alloc_profile_is_valid() for clarity.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:16 +0000 (17:09 +0300)]
Btrfs: add wrappers for working with alloc profiles
Add functions to abstract the conversion between chunk and extended
allocation profile formats and switch everybody to use them.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Ilya Dryomov [Tue, 27 Mar 2012 14:09:16 +0000 (17:09 +0300)]
Btrfs: stop silently switching single chunks to raid0 on balance
This has been causing a lot of confusion for quite a while now and a lot
of users were surprised by this (some of them were even stuck in a
ENOSPC situation which they couldn't easily get out of). The addition
of restriper gives users a clear choice between raid0 and drive concat
setup so there's absolutely no excuse for us to keep doing this.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Jan Schmidt [Fri, 23 Mar 2012 16:32:28 +0000 (17:32 +0100)]
Btrfs: fix regression in scrub path resolving
In commit
4692cf58 we introduced new backref walking code for btrfs. This
assumes we're searching live roots, which requires a transaction context.
While scrubbing, however, we must not join a transaction because this could
deadlock with the commit path. Additionally, what scrub really wants to do
is resolving a logical address in the commit root it's currently checking.
This patch adds support for logical to path resolving on commit roots and
makes scrub use that.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Jan Schmidt [Fri, 23 Mar 2012 16:24:19 +0000 (17:24 +0100)]
Btrfs: check return value of btrfs_cow_block()
The two helper functions commit_cowonly_roots() and
create_pending_snapshot() failed to check the return value from
btrfs_cow_block(), which could at least in theory fail with -ENOSPC from
btrfs_alloc_free_block(). This commit adds the missing checks.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Jan Schmidt [Fri, 23 Mar 2012 16:14:20 +0000 (17:14 +0100)]
Btrfs: actually call btrfs_init_lockdep
btrfs_init_lockdep only makes our lockdep class names look prettier, thus
it did never hurt we forgot to actually call it. This turns our lockdep
identifier strings from lockdep auto-set #[id] into really pretty
"btrfs-fs-01" or "btrfs-csum-03".
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Josef Bacik [Tue, 27 Mar 2012 01:57:36 +0000 (21:57 -0400)]
Btrfs: deal with read errors on extent buffers differently
Since we need to read and write extent buffers in their entirety we can't use
the normal bio_readpage_error stuff since it only works on a per page basis. So
instead make it so that if we see an io error in endio we just mark the eb as
having an IO error and then in btree_read_extent_buffer_pages we will manually
try other mirrors and then overwrite the bad mirror if we find a good copy.
This works with larger than page size blocks. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Chris Mason [Fri, 23 Mar 2012 14:22:46 +0000 (10:22 -0400)]
Btrfs: don't use threaded IO completion helpers for metadata writes
The metadata write IO completion code is now simple enough that we
don't need the threaded helpers anymore.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Chris Mason [Mon, 19 Mar 2012 19:54:38 +0000 (15:54 -0400)]
Btrfs: adjust the write_lock_level as we unlock
btrfs_search_slot sometimes needs write locks on high levels of
the tree. It remembers the highest level that needs a write lock
and will use that for all future searches through the tree in a given
call.
But, very often we'll just cow the top level or the level below and we
won't really need write locks on the root again after that. This patch
changes things to adjust the write lock requirement as it unlocks
levels.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Chris Mason [Wed, 21 Mar 2012 16:09:56 +0000 (12:09 -0400)]
Btrfs: loop waiting on writeback
lock_extent_buffer_for_io needs to loop around and make sure the
writeback bits are not set.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Chris Mason [Sat, 3 Mar 2012 12:40:03 +0000 (07:40 -0500)]
Btrfs: add the ability to cache a pointer into the eb
This cuts down on the CPU time used by map_private_extent_buffer
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Josef Bacik [Tue, 13 Mar 2012 13:38:00 +0000 (09:38 -0400)]
Btrfs: ensure an entire eb is written at once
This patch simplifies how we track our extent buffers. Previously we could exit
writepages with only having written half of an extent buffer, which meant we had
to track the state of the pages and the state of the extent buffers differently.
Now we only read in entire extent buffers and write out entire extent buffers,
this allows us to simply set bits in our bflags to indicate the state of the eb
and we no longer have to do things like track uptodate with our iotree. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Josef Bacik [Thu, 15 Mar 2012 22:24:42 +0000 (18:24 -0400)]
Btrfs: introduce mark_extent_buffer_accessed
Because an eb can have multiple pages we need to make sure that all pages within
the eb are markes as accessed, since releasepage can be called against any page
in the eb. This will keep us from possibly evicting hot eb's when we're doing
larger than pagesize eb's. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Fri, 9 Mar 2012 21:01:49 +0000 (16:01 -0500)]
Btrfs: introduce free_extent_buffer_stale
Because btrfs cow's we can end up with extent buffers that are no longer
necessary just sitting around in memory. So instead of evicting these pages, we
could end up evicting things we actually care about. Thus we have
free_extent_buffer_stale for use when we are freeing tree blocks. This will
make it so that the ref for the eb being in the radix tree is dropped as soon as
possible and then is freed when the refcount hits 0 instead of waiting to be
released by releasepage. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Fri, 9 Mar 2012 14:51:43 +0000 (09:51 -0500)]
Btrfs: only use the existing eb if it's count isn't 0
We can run into a problem where we find an eb for our existing page already on
the radix tree but it has a ref count of 0. It hasn't yet been removed by RCU
yet so this can cause issues where we will use the EB after free. So do
atomic_inc_not_zero on the exists->refs and if it is zero just do
synchronize_rcu() and try again. We won't have to worry about new allocators
coming in since they will block on the page lock at this point. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Wed, 7 Mar 2012 21:20:05 +0000 (16:20 -0500)]
Btrfs: set page->private to the eb
We spend a lot of time looking up extent buffers from pages when we could just
store the pointer to the eb the page is associated with in page->private. This
patch does just that, and it makes things a little simpler and reduces a bit of
CPU overhead involved with doing metadata IO. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Chris Mason [Fri, 6 Aug 2010 17:21:20 +0000 (13:21 -0400)]
Btrfs: allow metadata blocks larger than the page size
A few years ago the btrfs code to support blocks lager than
the page size was disabled to fix a few corner cases in the
page cache handling. This fixes the code to properly support
large metadata blocks again.
Since current kernels will crash early and often with larger
metadata blocks, this adds an incompat bit so that older kernels
can't mount it.
This also does away with different blocksizes for nodes and leaves.
You get a single block size for all tree blocks.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Josef Bacik [Wed, 18 Jan 2012 15:56:06 +0000 (10:56 -0500)]
Btrfs: remove search_start and search_end from find_free_extent and callers
We have been passing nothing but (u64)-1 to find_free_extent for search_end in
all of the callers, so it's completely useless, and we've always been passing 0
in as search_start, so just remove them as function arguments and move
search_start into find_free_extent. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Fri, 13 Jan 2012 20:27:45 +0000 (15:27 -0500)]
Btrfs: remove the ideal caching code
This is a relic from before we had the disk space cache and it was to make
bootup times when you had btrfs as root not be so damned slow. Now that we have
the disk space cache this isn't a problem anymore and really having this code
casues uneeded fragmentation and complexity, so just remove it. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Jan Kara [Mon, 12 Mar 2012 15:05:50 +0000 (16:05 +0100)]
btrfs: Fix busyloop in transaction_kthread()
When a filesystem got aborted due do error, transaction_kthread() will
busyloop. Fix it by going to sleep in that case as well. Maybe we should
just stop transaction_kthread() when filesystem is aborted but that would be
more complex.
Signed-off-by: Jan Kara <jack@suse.cz>
Jeff Mahoney [Mon, 12 Mar 2012 15:03:00 +0000 (16:03 +0100)]
btrfs: replace many BUG_ONs with proper error handling
btrfs currently handles most errors with BUG_ON. This patch is a work-in-
progress but aims to handle most errors other than internal logic
errors and ENOMEM more gracefully.
This iteration prevents most crashes but can run into lockups with
the page lock on occasion when the timing "works out."
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Thu, 1 Mar 2012 16:24:58 +0000 (17:24 +0100)]
btrfs: enhance transaction abort infrastructure
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Thu, 1 Mar 2012 13:57:30 +0000 (14:57 +0100)]
btrfs: add varargs to btrfs_error
btrfs currently handles most errors with BUG_ON. This patch is a work-in-
progress but aims to handle most errors other than internal logic
errors and ENOMEM more gracefully.
This iteration prevents most crashes but can run into lockups with
the page lock on occasion when the timing "works out."
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Mark Fasheh [Fri, 9 Sep 2011 00:40:01 +0000 (17:40 -0700)]
btrfs: Remove BUG_ON from __finish_chunk_alloc()
btrfs_alloc_chunk() unconditionally BUGs on any error returned from
__finish_chunk_alloc() so there's no need for two BUG_ON lines. Remove the
one from __finish_chunk_alloc().
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Mark Fasheh [Fri, 9 Sep 2011 00:29:00 +0000 (17:29 -0700)]
btrfs: Remove BUG_ON from __btrfs_alloc_chunk()
We BUG_ON() error from add_extent_mapping(), but that error looks pretty
easy to bubble back up - as far as I can tell there have not been any
permanent modifications to fs state at that point.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Mark Fasheh [Fri, 9 Sep 2011 00:14:32 +0000 (17:14 -0700)]
btrfs: Don't BUG_ON insert errors in btrfs_alloc_dev_extent()
The only caller of btrfs_alloc_dev_extent() is __btrfs_alloc_chunk() which
already bugs on any error returned. We can remove the BUG_ON's in
btrfs_alloc_dev_extent() then since __btrfs_alloc_chunk() will "catch" them
anyway.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Mark Fasheh [Thu, 1 Sep 2011 18:27:57 +0000 (11:27 -0700)]
btrfs: Go readonly on tree errors in balance_level
balace_level() seems to deal with missing tree nodes by BUG_ON(). Instead,
we can easily just set the file system readonly and bubble -EROFS back up
the stack.
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Mark Fasheh [Mon, 29 Aug 2011 21:30:39 +0000 (14:30 -0700)]
btrfs: Don't BUG_ON errors from update_ref_for_cow()
__btrfs_cow_block(), the only caller of update_ref_for_cow() will BUG_ON()
any error return. Instead, we can go read-only fs as update_ref_for_cow()
manipulates disk data in a way which doesn't look like it's easily rolled
back.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Mark Fasheh [Mon, 29 Aug 2011 21:17:04 +0000 (14:17 -0700)]
btrfs: Go readonly on bad extent refs in update_ref_for_cow()
update_ref_for_cow() will BUG_ON() after it's call to
btrfs_lookup_extent_info() if no existing references are found. Since refs
are computed directly from disk, this should be treated as a corruption
instead of a logic error.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Mark Fasheh [Wed, 10 Aug 2011 19:32:10 +0000 (12:32 -0700)]
btrfs: Don't BUG_ON errors in __finish_chunk_alloc()
All callers of __finish_chunk_alloc() BUG_ON() return value, so it's trivial
for us to always bubble up any errors caught in __finish_chunk_alloc() to be
caught there.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Mark Fasheh [Fri, 5 Aug 2011 22:46:16 +0000 (15:46 -0700)]
btrfs: Don't BUG_ON kzalloc error in btrfs_lookup_csums_range()
Unfortunately it isn't enough to just exit here - the kzalloc() happens in a
loop and the allocated items are added to a linked list whose head is passed
in from the caller.
To fix the BUG_ON() and also provide the semantic that the list passed in is
only modified on success, I create function-local temporary list that we add
items too. If no error is met, that list is spliced to the callers at the
end of the function. Otherwise the list will be walked and all items freed
before the error value is returned.
I did a simple test on this patch by forcing an error at the kzalloc() point
and verifying that when this hits (git clone seemed to exercise this), the
function throws the proper error. Unfortunately but predictably, we later
hit a BUG_ON(ret) type line that still hasn't been fixed up ;)
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Mark Fasheh [Mon, 8 Aug 2011 20:20:18 +0000 (13:20 -0700)]
btrfs: Don't BUG_ON() errors in update_ref_for_cow()
The only caller of update_ref_for_cow() is __btrfs_cow_block() which was
originally ignoring any return values. update_ref_for_cow() however doesn't
look like a candidate to become a void function - there are a few places
where errors can occur.
So instead I changed update_ref_for_cow() to bubble all errors up (instead
of BUG_ON). __btrfs_cow_block() was then updated to catch and BUG_ON() any
errors from update_ref_for_cow(). The end effect is that we have no change
in behavior, but about 8 different places where a BUG_ON(ret) was removed.
Obviously a future patch will have to address the BUG_ON() in
__btrfs_cow_block().
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Mark Fasheh [Tue, 26 Jul 2011 18:32:23 +0000 (11:32 -0700)]
btrfs: Don't BUG_ON errors from btrfs_create_subvol_root()
This is called from only one place - create_subvol() which passes errors
safely back out to it's caller, btrfs_mksubvol where they are handled.
Additionally, btrfs_create_subvol_root() itself bug's needlessly from error
return of btrfs_update_inode(). Since create_subvol() was fixed to catch
errors we can bubble this one up too.
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:22:41 +0000 (23:22 -0400)]
btrfs: btrfs_drop_snapshot should return int
Commit
cb1b69f4 (Btrfs: forced readonly when btrfs_drop_snapshot() fails)
made btrfs_drop_snapshot return void because there were no callers checking
the return value. That is the wrong order to handle error propogation since
the caller will have no idea that an error has occured and continue on
as if nothing went wrong.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Thu, 1 Mar 2012 13:57:19 +0000 (14:57 +0100)]
btrfs: split extent_state ops
set_extent_bit can do exclusive locking but only when called by lock_extent*,
Drop the exclusive bits argument except when called by lock_extent.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Thu, 1 Mar 2012 13:57:19 +0000 (14:57 +0100)]
btrfs: drop gfp_t from lock_extent
lock_extent and unlock_extent are always called with GFP_NOFS, drop the
argument and use GFP_NOFS consistently.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Thu, 1 Mar 2012 13:56:26 +0000 (14:56 +0100)]
btrfs: return void in functions without error conditions
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:23:15 +0000 (23:23 -0400)]
btrfs: __add_reloc_root error push-up
This patch pushes kmalloc errors up to the caller and BUGs in the caller.
The BUG_ON for duplicate reloc tree root insertion is replaced with a
panic explaining the issue.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:23:14 +0000 (23:23 -0400)]
btrfs: ->submit_bio_hook error push-up
This pushes failures from the submit_bio_hook callbacks,
btrfs_submit_bio_hook and btree_submit_bio_hook into the callers, including
callers of submit_one_bio where it catches the failures with BUG_ON.
It also pushes up through the ->readpage_io_failed_hook to
end_bio_extent_writepage where the error is already caught with BUG_ON.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:23:13 +0000 (23:23 -0400)]
btrfs: Factor out tree->ops->merge_bio_hook call
In submit_extent_page, there's a visually noisy if statement that, in
the midst of other conditions, does the tree dependency for tree->ops
and tree->ops->merge_bio_hook before calling it, and then another
condition afterwards. If an error is returned from merge_bio_hook,
there's no way to catch it. It's considered a routine "1" return
value instead of a failure.
This patch factors out the dependency check into a new local merge_bio
routine and BUG's on an error. The if statement is less noisy as a side-
effect.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:23:12 +0000 (23:23 -0400)]
btrfs: Simplify btrfs_submit_bio_hook
btrfs_submit_bio_hook currently calls btrfs_bio_wq_end_io in either case
of an if statement that determines one of the arguments.
This patch moves the function call outside of the if statement and uses it
to only determine the different argument. This allows us to catch an
error in one place in a more visually obvious way.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:22:44 +0000 (23:22 -0400)]
btrfs: btrfs_update_root error push-up
btrfs_update_root BUG's when it can't alloc a path, yet it can recover
from a search error. This patch returns -ENOMEM instead.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:22:43 +0000 (23:22 -0400)]
btrfs: find_and_setup_root error push-up
find_and_setup_root BUGs when it encounters an error from
btrfs_find_last_root, which can occur if a path can't be allocated.
This patch pushes it up to its callers where it is already handled.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Thu, 1 Mar 2012 13:56:29 +0000 (14:56 +0100)]
btrfs: Remove set bits return from clear_extent_bit
There is only one caller of clear_extent_bit that checks the return value
and it only checks if it's negative. Since there are no users of the
returned bits functionality of clear_extent_bit, stop returning it
and avoid complicating error handling.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Thu, 1 Mar 2012 13:56:28 +0000 (14:56 +0100)]
btrfs: avoid NULL deref in btrfs_reserve_extent with DEBUG_ENOSPC
__find_space_info can return NULL but we don't check it before calling
dump_space_info().
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Thu, 1 Mar 2012 13:56:27 +0000 (14:56 +0100)]
btrfs: clean_tree_block should panic on observed memory corruption and return void
The only error condition in clean_tree_block is an accounting bug.
Returning without modifying dirty_metadata_bytes and as if the cleaning
as been performed may cause problems later so it should panic instead.
It should probably be a BUG_ON but we have btrfs_panic now.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:22:34 +0000 (23:22 -0400)]
btrfs: Simplify btrfs_insert_root
btrfs_insert_root is just a wrapper for btrfs_insert_item. Just return
the error directly.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:23:23 +0000 (23:23 -0400)]
btrfs: Fix kfree of member instead of structure
Correctness fix: The kfree calls in the add_delayed_* functions free
the node that's passed into it, but the node is a member of another
structure. It works because it's always the first member of the
containing structure, but it should really be using the containing
structure itself.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:22:33 +0000 (23:22 -0400)]
btrfs: Panic on bad rbtree operations
The ordered data and relocation trees have BUG_ONs to protect against
bad tree operations.
This patch replaces them with a panic that will report the problem.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:22:32 +0000 (23:22 -0400)]
btrfs: Catch locking failures in {set,clear,convert}_extent_bit
The *_state functions can only return 0 or -EEXIST. This patch addresses
the cases where those functions returning -EEXIST represent a locking
failure. It handles them by panicking with an appropriate error message.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Jeff Mahoney [Tue, 4 Oct 2011 03:22:31 +0000 (23:22 -0400)]
btrfs: Add btrfs_panic()
As part of the effort to eliminate BUG_ON as an error handling
technique, we need to determine which errors are actual logic errors,
which are on-disk corruption, and which are normal runtime errors
e.g. -ENOMEM.
Annotating these error cases is helpful to understand and report them.
This patch adds a btrfs_panic() routine that will either panic
or BUG depending on the new -ofatal_errors={panic,bug} mount option.
Since there are still so many BUG_ONs, it defaults to BUG for now but I
expect that to change once the error handling effort has made
significant progress.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Linus Torvalds [Sun, 18 Mar 2012 23:15:34 +0000 (16:15 -0700)]
Linux 3.3
Jason Baron [Fri, 16 Mar 2012 20:34:03 +0000 (16:34 -0400)]
Don't limit non-nested epoll paths
Commit
28d82dc1c4ed ("epoll: limit paths") that I did to limit the
number of possible wakeup paths in epoll is causing a few applications
to longer work (dovecot for one).
The original patch is really about limiting the amount of epoll nesting
(since epoll fds can be attached to other fds). Thus, we probably can
allow an unlimited number of paths of depth 1. My current patch limits
it at 1000. And enforce the limits on paths that have a greater depth.
This is captured in: https://bugzilla.redhat.com/show_bug.cgi?id=681578
Signed-off-by: Jason Baron <jbaron@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 18 Mar 2012 02:22:24 +0000 (19:22 -0700)]
Merge git://git./linux/kernel/git/davem/net
Pull networking changes from David Miller:
"1) icmp6_dst_alloc() returns NULL instead of ERR_PTR() leading to
crashes, particularly during shutdown. Reported by Dave Jones and
fixed by Eric Dumazet.
2) hyperv and wimax/i2400m return NETDEV_TX_BUSY when they have
already freed the SKB, which causes crashes as to the caller this
means requeue the packet. Fixes from Eric Dumazet.
3) usbnet driver doesn't allocate the right amount of headroom on
fresh RX SKBs, fix from Eric Dumazet.
4) Fix regression in ip6_mc_find_dev_rcu(), as an RCU lookup it
abolutely should not take a reference to 'dev', this leads to
leaks. Fix from RonQing Li.
5) Fix netfilter ctnetlink race between delete and timeout expiration.
From Pablo Neira Ayuso.
6) Revert SFQ change which causes regressions, specifically queueing
to tail can lead to unavoidable flow starvation. From Eric
Dumazet.
7) Fix a memory leak and a crash on corrupt firmware files in bnx2x,
from Michal Schmidt."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
netfilter: ctnetlink: fix race between delete and timeout expiration
ipv6: Don't dev_hold(dev) in ip6_mc_find_dev_rcu.
wimax/i2400m: fix erroneous NETDEV_TX_BUSY use
net/hyperv: fix erroneous NETDEV_TX_BUSY use
net/usbnet: reserve headroom on rx skbs
bnx2x: fix memory leak in bnx2x_init_firmware()
bnx2x: fix a crash on corrupt firmware file
sch_sfq: revert dont put new flow at the end of flows
ipv6: fix icmp6_dst_alloc()
Linus Torvalds [Sat, 17 Mar 2012 16:54:16 +0000 (09:54 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar.
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf tools, x86: Build perf on older user-space as well
perf tools: Use scnprintf where applicable
perf tools: Incorrect use of snprintf results in SEGV
Pablo Neira Ayuso [Fri, 16 Mar 2012 02:00:34 +0000 (02:00 +0000)]
netfilter: ctnetlink: fix race between delete and timeout expiration
Kerin Millar reported hardlockups while running `conntrackd -c'
in a busy firewall. That system (with several processors) was
acting as backup in a primary-backup setup.
After several tries, I found a race condition between the deletion
operation of ctnetlink and timeout expiration. This patch fixes
this problem.
Tested-by: Kerin Millar <kerframil@gmail.com>
Reported-by: Kerin Millar <kerframil@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
RongQing.Li [Thu, 15 Mar 2012 22:54:14 +0000 (22:54 +0000)]
ipv6: Don't dev_hold(dev) in ip6_mc_find_dev_rcu.
ip6_mc_find_dev_rcu() is called with rcu_read_lock(), so don't
need to dev_hold().
With dev_hold(), not corresponding dev_put(), will lead to leak.
[ bug introduced in
96b52e61be1 (ipv6: mcast: RCU conversions) ]
Signed-off-by: RongQing.Li <roy.qing.li@gmail.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sat, 17 Mar 2012 00:14:55 +0000 (17:14 -0700)]
Merge branch 'akpm' (more patches from Andrew)
Merge some more email patches from Andrew Morton:
"A couple of nilfs fixes"
* emailed from Andrew Morton <akpm@linux-foundation.org>:
nilfs2: fix NULL pointer dereference in nilfs_load_super_block()
nilfs2: clamp ns_r_segments_percentage to [1, 99]
Ryusuke Konishi [Sat, 17 Mar 2012 00:08:39 +0000 (17:08 -0700)]
nilfs2: fix NULL pointer dereference in nilfs_load_super_block()
According to the report from Slicky Devil, nilfs caused kernel oops at
nilfs_load_super_block function during mount after he shrank the
partition without resizing the filesystem:
BUG: unable to handle kernel NULL pointer dereference at
00000048
IP: [<
d0d7a08e>] nilfs_load_super_block+0x17e/0x280 [nilfs2]
*pde =
00000000
Oops: 0000 [#1] PREEMPT SMP
...
Call Trace:
[<
d0d7a87b>] init_nilfs+0x4b/0x2e0 [nilfs2]
[<
d0d6f707>] nilfs_mount+0x447/0x5b0 [nilfs2]
[<
c0226636>] mount_fs+0x36/0x180
[<
c023d961>] vfs_kern_mount+0x51/0xa0
[<
c023ddae>] do_kern_mount+0x3e/0xe0
[<
c023f189>] do_mount+0x169/0x700
[<
c023fa9b>] sys_mount+0x6b/0xa0
[<
c04abd1f>] sysenter_do_call+0x12/0x28
Code: 53 18 8b 43 20 89 4b 18 8b 4b 24 89 53 1c 89 43 24 89 4b 20 8b 43
20 c7 43 2c 00 00 00 00 23 75 e8 8b 50 68 89 53 28 8b 54 b3 20 <8b> 72
48 8b 7a 4c 8b 55 08 89 b3 84 00 00 00 89 bb 88 00 00 00
EIP: [<
d0d7a08e>] nilfs_load_super_block+0x17e/0x280 [nilfs2] SS:ESP 0068:
ca9bbdcc
CR2:
0000000000000048
This turned out due to a defect in an error path which runs if the
calculated location of the secondary super block was invalid.
This patch fixes it and eliminates the reported oops.
Reported-by: Slicky Devil <slicky.dvl@gmail.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Tested-by: Slicky Devil <slicky.dvl@gmail.com>
Cc: <stable@vger.kernel.org> [2.6.30+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Haogang Chen [Sat, 17 Mar 2012 00:08:38 +0000 (17:08 -0700)]
nilfs2: clamp ns_r_segments_percentage to [1, 99]
ns_r_segments_percentage is read from the disk. Bogus or malicious
value could cause integer overflow and malfunction due to meaningless
disk usage calculation. This patch reports error when mounting such
bogus volumes.
Signed-off-by: Haogang Chen <haogangchen@gmail.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 17 Mar 2012 00:04:02 +0000 (17:04 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/linux-security
Pull maintainer update from James Morris:
"Please pull this patch which adds Serge as maintainer of the
capabilities code, as discussed on lwn and the lsm list.
New capabilities must be signed off by the maintainer, and new uses of
any capabilities should at be cc'd to the maintainer."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
MAINTAINERS: Add Serge as maintainer of capabilities
Linus Torvalds [Sat, 17 Mar 2012 00:03:15 +0000 (17:03 -0700)]
Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming
Pull c6x bugfix from Mark Salter:
"Remove dead code from entry.S which causes a build failure when using
a newer assembler (v2.22 complains about it, v2.20 ignores it)."
* tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming:
C6X: remove dead code from entry.S
Anton Blanchard [Fri, 16 Mar 2012 10:28:19 +0000 (10:28 +0000)]
afs: Remote abort can cause BUG in rxrpc code
When writing files to afs I sometimes hit a BUG:
kernel BUG at fs/afs/rxrpc.c:179!
With a backtrace of:
afs_free_call
afs_make_call
afs_fs_store_data
afs_vnode_store_data
afs_write_back_from_locked_page
afs_writepages_region
afs_writepages
The cause is:
ASSERT(skb_queue_empty(&call->rx_queue));
Looking at a tcpdump of the session the abort happens because we
are exceeding our disk quota:
rx abort fs reply store-data error diskquota exceeded (32)
So the abort error is valid. We hit the BUG because we haven't
freed all the resources for the call.
By freeing any skbs in call->rx_queue before calling afs_free_call
we avoid hitting leaking memory and avoid hitting the BUG.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Anton Blanchard [Fri, 16 Mar 2012 10:28:07 +0000 (10:28 +0000)]
afs: Read of file returns EBADMSG
A read of a large file on an afs mount failed:
# cat junk.file > /dev/null
cat: junk.file: Bad message
Looking at the trace, call->offset wrapped since it is only an
unsigned short. In afs_extract_data:
_enter("{%u},{%zu},%d,,%zu", call->offset, len, last, count);
...
if (call->offset < count) {
if (last) {
_leave(" = -EBADMSG [%d < %zu]", call->offset, count);
return -EBADMSG;
}
Which matches the trace:
[cat ] ==> afs_extract_data({65132},{524},1,,65536)
[cat ] <== afs_extract_data() = -EBADMSG [0 < 65536]
call->offset went from 65132 to 0. Fix this by making call->offset an
unsigned int.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mark Salter [Fri, 16 Mar 2012 13:27:57 +0000 (09:27 -0400)]
C6X: remove dead code from entry.S
The ENDPROC() on sys_fadvise64_c6x() in arch/c6x/kernel/entry.S is
outside of the conditional block with the matching ENTRY() macro. This
leads a newer (v2.22 vs. v2.20) assembler to complain:
/tmp/ccGZBaPT.s: Assembler messages:
/tmp/ccGZBaPT.s: Error: .size expression for sys_fadvise64_c6x does not evaluate to a constant
The conditional block became dead code when c6x switched to generic
unistd.h and should be removed along with the offending ENDPROC().
Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Eric Dumazet [Wed, 14 Mar 2012 09:21:44 +0000 (09:21 +0000)]
wimax/i2400m: fix erroneous NETDEV_TX_BUSY use
A driver start_xmit() method cannot free skb and return NETDEV_TX_BUSY,
since caller is going to reuse freed skb.
In fact netif_tx_stop_queue() / netif_stop_queue() is needed before
returning NETDEV_TX_BUSY or you can trigger a ksoftirqd fatal loop.
In case of memory allocation error, only safe way is to drop the packet
and return NETDEV_TX_OK
Also increments tx_dropped counter
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Wed, 14 Mar 2012 08:53:34 +0000 (08:53 +0000)]
net/hyperv: fix erroneous NETDEV_TX_BUSY use
A driver start_xmit() method cannot free skb and return NETDEV_TX_BUSY,
since caller is going to reuse freed skb.
This is mostly a revert of commit
bf769375c (staging: hv: fix the return
status of netvsc_start_xmit())
In fact netif_tx_stop_queue() / netif_stop_queue() is needed before
returning NETDEV_TX_BUSY or you can trigger a ksoftirqd fatal loop.
In case of memory allocation error, only safe way is to drop the packet
and return NETDEV_TX_OK
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Wed, 14 Mar 2012 06:56:25 +0000 (06:56 +0000)]
net/usbnet: reserve headroom on rx skbs
network drivers should reserve some headroom on incoming skbs so that we
dont need expensive reallocations, eg forwarding packets in tunnels.
This NET_SKB_PAD padding is done in various helpers, like
__netdev_alloc_skb_ip_align() in this patch, combining NET_SKB_PAD and
NET_IP_ALIGN magic.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Oliver Neukum <oneukum@suse.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Michal Schmidt [Thu, 15 Mar 2012 14:08:29 +0000 (14:08 +0000)]
bnx2x: fix memory leak in bnx2x_init_firmware()
When cycling the interface down and up, bnx2x_init_firmware() knows that
the firmware is already loaded, but nevertheless it allocates certain
arrays anew (init_data, init_ops, init_ops_offsets, iro_arr). The old
arrays are leaked.
Fix the leaks by returning early if the firmware was already loaded.
Because if the firmware is loaded, so are the arrays.
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Acked-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Michal Schmidt [Thu, 15 Mar 2012 14:08:28 +0000 (14:08 +0000)]
bnx2x: fix a crash on corrupt firmware file
If the requested firmware is deemed corrupt and then released, reset the
pointer to NULL in order to avoid double-freeing it in
bnx2x_release_firmware() or dereferencing it in bnx2x_init_firmware().
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Acked-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Tue, 13 Mar 2012 18:04:25 +0000 (18:04 +0000)]
sch_sfq: revert dont put new flow at the end of flows
This reverts commit
d47a0ac7b6 (sch_sfq: dont put new flow at the end of
flows)
As Jesper found out, patch sounded great but has bad side effects.
In stress situation, pushing new flows in front of the queue can prevent
old flows doing any progress. Packets can stay in SFQ queue for
unlimited amount of time.
It's possible to add heuristics to limit this problem, but this would
add complexity outside of SFQ scope.
A more sensible answer to Dave Taht concerns (who reported the issued I
tried to solve in original commit) is probably to use a qdisc hierarchy
so that high prio packets dont enter a potentially crowded SFQ qdisc.
Reported-by: Jesper Dangaard Brouer <jdb@comx.dk>
Cc: Dave Taht <dave.taht@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Wed, 14 Mar 2012 21:13:11 +0000 (21:13 +0000)]
ipv6: fix icmp6_dst_alloc()
commit
87a115783 ( ipv6: Move xfrm_lookup() call down into
icmp6_dst_alloc().) forgot to convert one error path, leading
to crashes in mld_sendpack()
Many thanks to Dave Jones for providing a very complete bug report.
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
James Morris [Fri, 16 Mar 2012 01:05:48 +0000 (12:05 +1100)]
MAINTAINERS: Add Serge as maintainer of capabilities
Add Serge as maintainer of capabilities, per suggestion on LWN:
http://lwn.net/Articles/486306/
Signed-off-by: James Morris <james.l.morris@oracle.com>
Linus Torvalds [Fri, 16 Mar 2012 00:16:22 +0000 (17:16 -0700)]
Merge branch 'akpm' (Andrew's patch-bomb)
Merge patches from Andrew Morton:
"Nine patches - some bug fixes and some MAINTAINERS fiddling."
* emailed from Andrew Morton <akpm@linux-foundation.org>:
drivers/video/backlight/s6e63m0.c: fix corruption storing gamma mode
MAINTAINERS: add entry for exynos mipi display drivers
MAINTAINERS: fix link to Gustavo Padovans tree
MAINTAINERS: add Johan to Bluetooth maintainers
MAINTAINERS: Gustavo has moved
prctl: use CAP_SYS_RESOURCE for PR_SET_MM option
rapidio/tsi721: fix bug in register offset definitions
MAINTAINERS: update ST's Mailing list for SPEAr
memcg: free mem_cgroup by RCU to fix oops
Linus Torvalds [Fri, 16 Mar 2012 00:14:35 +0000 (17:14 -0700)]
Merge branch 'i2c-for-linus' of git://git./linux/kernel/git/jdelvare/staging
Pull i2c subsystem fixes from Jean Delvare.
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c-algo-bit: Fix spurious SCL timeouts under heavy load
i2c-core: Comment says "transmitted" but means "received"
Linus Torvalds [Fri, 16 Mar 2012 00:13:39 +0000 (17:13 -0700)]
Merge tag 'hwmon-for-linus' of git://git./linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck.
* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (zl6100) Enable interval between chip accesses for all chips
hwmon: (w83627ehf) Describe undocumented pwm attributes
hwmon: (w83627ehf) Fix temp2 source for W83627UHG
hwmon: (w83627ehf) Fix memory leak in probe function
hwmon: (w83627ehf) Fix writing into fan_stop_time for NCT6775F/NCT6776F
Linus Torvalds [Fri, 16 Mar 2012 00:07:25 +0000 (17:07 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm exynos/intel updates from Dave Airlie:
"Two minor updates from Jesse for Intel SNB fixes, and a few fixes from
Samsung for exynos. The pull req has Alan's commit in it since Intel
based their tree on my tree at that time, but it all seems fine wrt
merging."
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm exynos: use drm_fb_helper_set_par directly
drm/exynos: Fix fb_videomode <-> drm_mode_modeinfo conversion
drm/exynos: fix runtime_pm fimd device state on probe
drm/exynos: use correct 'exynos-drm' name for platform device
drm/i915: support 32 bit BGR formats in sprite planes
drm/i915: fix color order for BGR formats on SNB
drm/gma500: Fix Cedarview boot failures in 3.3-rc
Linus Torvalds [Fri, 16 Mar 2012 00:06:05 +0000 (17:06 -0700)]
Merge branch 'v4l_for_linus' of git://git./linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
"For 4 fixes for 3.3 (all trivial):
- uvc video driver: fixes a division by zero;
- davinci: add module.h to fix compilation;
- smsusb: fix the delivery system setting;
- smsdvb: the get_frontend implementation there is broken.
The smsdvb patch has 127 lines, but it is trivial: instead of
returning a cache of the set_frontend (with is wrong, as it doesn't
have the updated values for the data, and the implementation there is
buggy), it copies the information of the detected DVB parameters from
the smsdvb private structures into the corresponding DVBv5 struct
fields."
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
[media] smsdvb: fix get_frontend
[media] smsusb: fix the default delivery system setting
[media] media: davinci: added module.h to resolve unresolved macros
[media] [FOR,v3.3] uvcvideo: Avoid division by 0 in timestamp calculation
Linus Torvalds [Fri, 16 Mar 2012 00:04:56 +0000 (17:04 -0700)]
Merge branch '3.3-urgent' of git://git./linux/kernel/git/nab/target-pending
Pull target fixes from Nicholas Bellinger:
"This series addresses two recently reported regression bugs related to
legacy SCSI reservation usage in target core, and iscsi-target
reservation conflict handling.
The second patch in particular addresses possible data-corruption with
SCSI reservations that is specific to iscsi-target fabric LUNs with
multiple client writers. Both patches need to go into v3.2 stable
ASAP, and the branch based on the last target-pending/3.3-rc-fixes
HEAD.
Again, thanks to Martin Svec for his help to identify and address this
regression bug with iscsi-target."
* '3.3-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
iscsi-target: Fix reservation conflict -EBUSY response handling bug
target: Fix compatible reservation handling (CRH=1) with legacy RESERVE/RELEASE
Dan Carpenter [Thu, 15 Mar 2012 22:17:12 +0000 (15:17 -0700)]
drivers/video/backlight/s6e63m0.c: fix corruption storing gamma mode
strict_strtoul() writes a long but ->gamma_mode only has space to store an
int, so on 64 bit systems we end up scribbling over ->gamma_table_count as
well. I've changed it to use kstrtouint() instead.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Donghwa Lee [Thu, 15 Mar 2012 22:17:11 +0000 (15:17 -0700)]
MAINTAINERS: add entry for exynos mipi display drivers
I'd like to add Inki Dae, Donghwa Lee and Kyungmin Park as maintainers
who developers for exynos mipi display drivers for
video/driver/exynos/exynos_mipi* and include/video/exynos_mipi*.
Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Johan Hedberg [Thu, 15 Mar 2012 22:17:11 +0000 (15:17 -0700)]
MAINTAINERS: fix link to Gustavo Padovans tree
Gustavo's tree is called just bluetooth.git and not bluetooth-2.6.git
anymore.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: "Gustavo F. Padovan" <padovan@profusion.mobi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>