This is the third step in bootstrapping the btrfs_find_item interface.
The function find_orphan_item(), in orphan.c, is similar to the two
functions already replaced by the new interface. It uses two parameters,
which are already present in the interface, and is nearly identical to
the function brought in in the previous patch.
Replace the two calls to find_orphan_item() with calls to
btrfs_find_item(), with the defined objectid and type that was used
internally by find_orphan_item(), a null path, and a null key. Add a
test for a null path to btrfs_find_item, and if it passes, allocate and
free the path. Finally, remove find_orphan_item().
Signed-off-by: Kelley Nielsen <kelleynnn@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
This patch is the second step in bootstrapping the btrfs_find_item
interface. The btrfs_find_root_ref() is similar to the former
__inode_info(); it accepts four of its parameters, and duplicates the
first half of its functionality.
Replace the one former call to btrfs_find_root_ref() with a call to
btrfs_find_item(), along with the defined key type that was used
internally by btrfs_find_root ref, and a null found key. In
btrfs_find_item(), add a test for the null key at the place where
the functionality of btrfs_find_root_ref() ends; btrfs_find_item()
then returns if the test passes. Finally, remove btrfs_find_root_ref().
Signed-off-by: Kelley Nielsen <kelleynnn@gmail.com>
Suggested-by: Zach Brown <zab@redhat.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
There are many btrfs functions that manually search the tree for an
item. They all reimplement the same mechanism and differ in the
conditions that they use to find the item. __inode_info() is one such
example. Zach Brown proposed creating a new interface to take the place
of these functions.
This patch is the first step to creating the interface. A new function,
btrfs_find_item, has been added to ctree.c and prototyped in ctree.h.
It is identical to __inode_info, except that the order of the parameters
has been rearranged to more closely those of similar functions elsewhere
in the code (now, root and path come first, then the objectid, offset
and type, and the key to be filled in last). __inode_info's callers have
been set to call this new function instead, and __inode_info itself has
been removed.
Signed-off-by: Kelley Nielsen <kelleynnn@gmail.com>
Suggested-by: Zach Brown <zab@redhat.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
Use otherwise unused local variables slot in update_qgroup_limit_item and
in update_qgroup_info_item, and remove unused variable ins from
btrfs_qgroup_account_ref.
Signed-off-by: Valentina Giusti <valentina.giusti@microon.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
The variable window_start in setup_cluster_no_bitmap is not used since commit
1bb91902dc
(Btrfs: revamp clustered allocation logic)
Signed-off-by: Valentina Giusti <valentina.giusti@microon.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
Remove unused variables:
* tree from end_bio_extent_writepage,
* item from extent_fiemap.
Signed-off-by: Valentina Giusti <valentina.giusti@microon.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
The variable found_uncached_bg in find_free_extent is not used since commit
285ff5af6c
(Btrfs: remove the ideal caching code)
Signed-off-by: Valentina Giusti <valentina.giusti@microon.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
Remove unused variables:
* tree from csum_dirty_buffer,
* tree from btree_readpage_end_io_hook,
* tree from btree_writepages,
* bytenr from btrfs_create_tree,
* fs_info from end_workqueue_fn.
Signed-off-by: Valentina Giusti <valentina.giusti@microon.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
Variable owner in btrfs_new_inode is unused since commit
d82a6f1d7e
(Btrfs: kill BTRFS_I(inode)->block_group)
Signed-off-by: Valentina Giusti <valentina.giusti@microon.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
This adds a writeable attribute which describes the label.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
Now that we have the infrastructure for per-super attributes, we can
publish device membership in /sys/fs/btrfs/<fsid>/devices. The information
is published as symlinks to the block devices.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
While trying to debug ENOSPC issues, it's helpful to understand what the
kernel's view of the available space is. We export this information
via ioctl, but sysfs files are more easily used.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
btrfs filesystem df output will show the size of the metadata space
and how much of it is used, and the user assumes that the difference
is all usable space. Since that's not actually the case due to the
global metadata reservation, we should provide the full picture to the
user.
This patch adds an ioctl that exports the size of the global metadata
reservation so that btrfs filesystem df can report it.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
Now that we have the feature name strings available in the kernel via
the sysfs attributes, we can use them for printing better failure
messages from the ioctl path.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
This patch adds the ability to change (set/clear) features while the file
system is mounted. A bitmask is added for each feature set for the
support to set and clear the bits. A message indicating which bit
has been set or cleared is issued when it's been changed and also when
permission or support for a particular bit has been denied.
Since the the attributes can now be writable, we need to introduce
another struct attribute to hold the different permissions.
If neither set or clear is supported, the file will have 0444 permissions.
If either set or clear is supported, the file will have 0644 permissions
and the store handler will filter out the write based on the bitmask.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
With the compat and compat-ro bits, it's possible for file systems to
exist that have features that aren't supported by the kernel's file system
implementation yet still be mountable.
This patch publishes read-only info on those features using a prefix:number
format, where the number is the bit number rather than the shifted value.
e.g. "compat:12"
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
This patch publishes information on which features are enabled in the
file system on a per-super basis. At this point, it only publishes
information on features supported by the file system implementation.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
This patch adds per-super attributes to sysfs.
It doesn't publish any attributes yet, but does the proper lifetime
handling as well as the basic infrastructure to add new attributes.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
This patch adds the ability to publish supported features to sysfs under
/sys/fs/btrfs/features.
The files are module-wide and export which features the kernel supports.
The content, for now, is just "0\n".
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
There are some feature bits that require no offline setup and can
be enabled online. I've only reviewed extended irefs, but there will
probably be more.
We introduce three new ioctls:
- BTRFS_IOC_GET_SUPPORTED_FEATURES: query the kernel for supported features.
- BTRFS_IOC_GET_FEATURES: query the kernel for enabled features on a per-fs
basis, as well as querying for which features are changeable with mounted.
- BTRFS_IOC_SET_FEATURES: change features on a per-fs basis.
We introduce two new masks per feature set (_SAFE_SET and _SAFE_CLEAR) that
allow us to define which features are safe to change at runtime.
The failure modes for BTRFS_IOC_SET_FEATURES are as follows:
- Enabling a completely unsupported feature: warns and returns -ENOTSUPP
- Enabling a feature that can only be done offline: warns and returns -EPERM
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
When we have data deduplication on, we'll hang on the merge part
because it needs to verify every queued delayed data refs related to
this disk offset but we may have millions refs.
And in the case of delayed data refs, we don't usually have too much
data refs to merge.
So it's safe to shut it down for data refs.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
The way how we process delayed refs is
1) get a bunch of head refs,
2) pick up one head ref,
3) go one node back for any delayed ref updates.
The head ref is also linked in the same rbtree as the delayed ref is,
so in 1) stage, we have to walk one by one including not only head refs, but
delayed refs.
When we have a great number of delayed refs pending to process,
this'll cost time a lot.
Here we introduce a head ref specific rbtree, it only has head refs, so troubles
go away.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
We were looking at file_extent_num_bytes unconditionally when looking at
referenced data bytes, but this isn't correct for compression. Fix this by
checking the compression of the file extent we are and setting num_bytes to
disk_num_bytes in the case of compression so that we are marking the proper
bytes as referenced. This fixes check_int_data freaking out when running
btrfs/004. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
Btrfs has always had these filler extent data items for holes in inodes. This
has made somethings very easy, like logging hole punches and sending hole
punches. However for large holey files these extent data items are pure
overhead. So add an incompatible feature to no longer add hole extents to
reduce the amount of metadata used by these sort of files. This has a few
changes for logging and send obviously since they will need to detect holes and
log/send the holes if there are any. I've tested this thoroughly with xfstests
and it doesn't cause any issues with and without the incompat format set.
Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
Pull vfs updates from Al Viro:
"Assorted stuff; the biggest pile here is Christoph's ACL series. Plus
assorted cleanups and fixes all over the place...
There will be another pile later this week"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (43 commits)
__dentry_path() fixes
vfs: Remove second variable named error in __dentry_path
vfs: Is mounted should be testing mnt_ns for NULL or error.
Fix race when checking i_size on direct i/o read
hfsplus: remove can_set_xattr
nfsd: use get_acl and ->set_acl
fs: remove generic_acl
nfs: use generic posix ACL infrastructure for v3 Posix ACLs
gfs2: use generic posix ACL infrastructure
jfs: use generic posix ACL infrastructure
xfs: use generic posix ACL infrastructure
reiserfs: use generic posix ACL infrastructure
ocfs2: use generic posix ACL infrastructure
jffs2: use generic posix ACL infrastructure
hfsplus: use generic posix ACL infrastructure
f2fs: use generic posix ACL infrastructure
ext2/3/4: use generic posix ACL infrastructure
btrfs: use generic posix ACL infrastructure
fs: make posix_acl_create more useful
fs: make posix_acl_chmod more useful
...
Also don't bother to set up a .get_acl method for symlinks as we do not
support access control (ACLs or even mode bits) for symlinks in Linux.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Rename the current posix_acl_created to __posix_acl_create and add
a fully featured helper to set up the ACLs on file creation that
uses get_acl().
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Rename the current posix_acl_chmod to __posix_acl_chmod and add
a fully featured ACL chmod helper that uses the ->set_acl inode
operation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* don't assume that ->dest_count won't change between copy_from_user()
and memdup_user()
* use fdget instead of fget
* don't bother comparing superblocks when we'd already compared vfsmounts
* get rid of excessive goto
* use file_inode() instead of open-coding the sucker
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
For 3.14-rc1 there are fixes in the areas of remote attributes, discard,
growfs, memory leaks in recovery, directory v2, quotas, the MAINTAINERS
file, allocation alignment, extent list locking, and in
xfs_bmapi_allocate. There are cleanups in xfs_setsize_buftarg, removing
unused macros, quotas, setattr, and freeing of inode clusters. The
in-memory and on-disk log format have been decoupled, a common helper to
calculate the number of blocks in an inode cluster has been added, and
handling of i_version has been pulled into the filesystems that use it.
- cleanup in xfs_setsize_buftarg
- removal of remaining unused flags for vop toss/flush/flushinval
- fix for memory corruption in xfs_attrlist_by_handle
- fix for out-of-date comment in xfs_trans_dqlockedjoin
- fix for discard if range length is less than one block
- fix for overrun of agfl buffer using growfs on v4 superblock filesystems
- pull i_version handling out into the filesystems that use it
- don't leak recovery items on error
- fix for memory leak in xfs_dir2_node_removename
- several cleanups for quotas
- fix bad assertion in xfs_qm_vop_create_dqattach
- cleanup for xfs_setattr_mode, and add xfs_setattr_time
- fix quota assert in xfs_setattr_nonsize
- fix an infinite loop when turning off group/project quota before user
quota
- fix for temporary buffer allocation failure in xfs_dir2_block_to_sf
with large directory block sizes
- fix Dave's email address in MAINTAINERS
- cleanup calculation of freed inode cluster blocks
- fix alignment of initial file allocations to match filesystem geometry
- decouple in-memory and on-disk log format
- introduce a common helper to calculate the number of filesystem
blocks in an inode cluster
- fixes for extent list locking
- fix for off-by-one in xfs_attr3_rmt_verify
- fix for missing destroy_work_on_stack in xfs_bmapi_allocate
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Merge tag 'xfs-for-linus-v3.14-rc1' of git://oss.sgi.com/xfs/xfs
Pull xfs update from Ben Myers:
"This is primarily bug fixes, many of which you already have. New
stuff includes a series to decouple the in-memory and on-disk log
format, helpers in the area of inode clusters, and i_version handling.
We decided to try to use more topic branches this release, so there
are some merge commits in there on account of that. I'm afraid I
didn't do a good job of putting meaningful comments in the first
couple of merges. Sorry about that. I think I have the hang of it
now.
For 3.14-rc1 there are fixes in the areas of remote attributes,
discard, growfs, memory leaks in recovery, directory v2, quotas, the
MAINTAINERS file, allocation alignment, extent list locking, and in
xfs_bmapi_allocate. There are cleanups in xfs_setsize_buftarg,
removing unused macros, quotas, setattr, and freeing of inode
clusters. The in-memory and on-disk log format have been decoupled, a
common helper to calculate the number of blocks in an inode cluster
has been added, and handling of i_version has been pulled into the
filesystems that use it.
- cleanup in xfs_setsize_buftarg
- removal of remaining unused flags for vop toss/flush/flushinval
- fix for memory corruption in xfs_attrlist_by_handle
- fix for out-of-date comment in xfs_trans_dqlockedjoin
- fix for discard if range length is less than one block
- fix for overrun of agfl buffer using growfs on v4 superblock
filesystems
- pull i_version handling out into the filesystems that use it
- don't leak recovery items on error
- fix for memory leak in xfs_dir2_node_removename
- several cleanups for quotas
- fix bad assertion in xfs_qm_vop_create_dqattach
- cleanup for xfs_setattr_mode, and add xfs_setattr_time
- fix quota assert in xfs_setattr_nonsize
- fix an infinite loop when turning off group/project quota before
user quota
- fix for temporary buffer allocation failure in xfs_dir2_block_to_sf
with large directory block sizes
- fix Dave's email address in MAINTAINERS
- cleanup calculation of freed inode cluster blocks
- fix alignment of initial file allocations to match filesystem
geometry
- decouple in-memory and on-disk log format
- introduce a common helper to calculate the number of filesystem
blocks in an inode cluster
- fixes for extent list locking
- fix for off-by-one in xfs_attr3_rmt_verify
- fix for missing destroy_work_on_stack in xfs_bmapi_allocate"
* tag 'xfs-for-linus-v3.14-rc1' of git://oss.sgi.com/xfs/xfs: (51 commits)
xfs: Calling destroy_work_on_stack() to pair with INIT_WORK_ONSTACK()
xfs: fix off-by-one error in xfs_attr3_rmt_verify
xfs: assert that we hold the ilock for extent map access
xfs: use xfs_ilock_attr_map_shared in xfs_attr_list_int
xfs: use xfs_ilock_attr_map_shared in xfs_attr_get
xfs: use xfs_ilock_data_map_shared in xfs_qm_dqiterate
xfs: use xfs_ilock_data_map_shared in xfs_qm_dqtobp
xfs: take the ilock around xfs_bmapi_read in xfs_zero_remaining_bytes
xfs: reinstate the ilock in xfs_readdir
xfs: add xfs_ilock_attr_map_shared
xfs: rename xfs_ilock_map_shared
xfs: remove xfs_iunlock_map_shared
xfs: no need to lock the inode in xfs_find_handle
xfs: use xfs_icluster_size_fsb in xfs_imap
xfs: use xfs_icluster_size_fsb in xfs_ifree_cluster
xfs: use xfs_icluster_size_fsb in xfs_ialloc_inode_init
xfs: use xfs_icluster_size_fsb in xfs_bulkstat
xfs: introduce a common helper xfs_icluster_size_fsb
xfs: get rid of XFS_IALLOC_BLOCKS macros
xfs: get rid of XFS_INODE_CLUSTER_SIZE macros
...
In btrfs_end_bio(), we increment bi_remaining if is_orig_bio. If not,
we restore the orig_bio but failed to increment bi_remaining for
orig_bio, which triggers a BUG_ON later when bio_endio is called. Fix
is to increment bi_remaining when we restore the orig bio as well.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
CC: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Muthukumar Ratty <muthur@gmail.com>
Reviewed-by: Chris Mason <clm@fb.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This patch fixed several typo in printk from various
part of kernel source.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Merge tag 'v3.13-rc6' into for-3.14/core
Needed to bring blk-mq uptodate, since changes have been going in
since for-3.14/core was established.
Fixup merge issues related to the immutable biovec changes.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Conflicts:
block/blk-flush.c
fs/btrfs/check-integrity.c
fs/btrfs/extent_io.c
fs/btrfs/scrub.c
fs/logfs/dev_bdev.c
Correct spelling typo in various part of kernel
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Pull btrfs fixes from Chris Mason:
"This is a small collection of fixes. It was rebased this morning, but
I was just fixing signed-off-by tags with the wrong email"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: fix access_ok() check in btrfs_ioctl_send()
Btrfs: make sure we cleanup all reloc roots if error happens
Btrfs: skip building backref tree for uuid and quota tree when doing balance relocation
Btrfs: fix an oops when doing balance relocation
Btrfs: don't miss skinny extent items on delayed ref head contention
btrfs: call mnt_drop_write after interrupted subvol deletion
Btrfs: don't clear the default compression type
The closing parenthesis is in the wrong place. We want to check
"sizeof(*arg->clone_sources) * arg->clone_sources_count" instead of
"sizeof(*arg->clone_sources * arg->clone_sources_count)".
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
cc: stable@vger.kernel.org
I hit an oops when merging reloc roots fails, the reason is that
new reloc roots may be added and we should make sure we cleanup
all reloc roots.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Quota tree and UUID Tree is only cowed, they can not be snapshoted.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
I hit an oops when inserting reloc root into @reloc_root_tree(it can be
easily triggered when forcing cow for relocation root)
[ 866.494539] [<ffffffffa0499579>] btrfs_init_reloc_root+0x79/0xb0 [btrfs]
[ 866.495321] [<ffffffffa044c240>] record_root_in_trans+0xb0/0x110 [btrfs]
[ 866.496109] [<ffffffffa044d758>] btrfs_record_root_in_trans+0x48/0x80 [btrfs]
[ 866.496908] [<ffffffffa0494da8>] select_reloc_root+0xa8/0x210 [btrfs]
[ 866.497703] [<ffffffffa0495c8a>] do_relocation+0x16a/0x540 [btrfs]
This is because reloc root inserted into @reloc_root_tree is not within one
transaction,reloc root may be cowed and root block bytenr will be reused then
oops happens.We should update reloc root in @reloc_root_tree when cow reloc
root node, fix it.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Currently extent-tree.c:btrfs_lookup_extent_info() can miss the lookup
of skinny extent items. This can happen when the execution flow is the
following:
* We do an extent tree lookup and fail to find a skinny extent item;
* As a result, we attempt to see if a non-skinny extent item exists,
either by looking at previous item in the leaf or by doing another
full extent tree search;
* We have a transaction and then we check for a matching delayed ref
head in the transaction's delayed refs rbtree;
* We find such delayed ref head and then we try to lock it with a
call to mutex_trylock();
* The lock was contended so we jump to the label "again", which repeats
the extent tree search but for a non-skinny extent item, because we set
previously metadata variable to 0 and the search key to look for a
non-skinny extent-item;
* After the jump (and after releasing the transaction's delayed refs
lock), a skinny extent item might have been added to the extent tree
but we will miss it because metadata is set to 0 and the search key
is set for a non-skinny extent-item.
The fix here is to not reset metadata to 0 and to jump to the initial search
key setup if the delayed ref head is contended, instead of jumping directly
to the extent tree search label ("again").
This issue was found while investigating the issue reported at Bugzilla 64961.
David Sterba suspected this function was missing extent items, and that
this could be caused by the last change to this function, which was made
in the following patch:
[PATCH] Btrfs: optimize btrfs_lookup_extent_info()
(commit 74be951087)
But in fact this issue already existed before, because after failing to find
a skinny extent item, the code set the search key for a non-skinny extent
item, and on contention of a matching delayed ref head it would not search
the extent tree for a skinny extent item anymore.
Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
If btrfs_ioctl_snap_destroy blocks on the mutex and the process is
killed, mnt_write count is unbalanced and leads to unmountable
filesystem.
CC: stable@vger.kernel.org
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
We met a oops caused by the wrong compression type:
[ 556.512356] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 556.512370] IP: [<ffffffff811dbaa0>] __list_del_entry+0x1/0x98
[SNIP]
[ 556.512490] [<ffffffff811dbb44>] ? list_del+0xd/0x2b
[ 556.512539] [<ffffffffa05dd5ce>] find_workspace+0x97/0x175 [btrfs]
[ 556.512546] [<ffffffff813c14b5>] ? _raw_spin_lock+0xe/0x10
[ 556.512576] [<ffffffffa05de276>] btrfs_compress_pages+0x2d/0xa2 [btrfs]
[ 556.512601] [<ffffffffa05af060>] compress_file_range.constprop.54+0x1f2/0x4e8 [btrfs]
[ 556.512627] [<ffffffffa05af388>] async_cow_start+0x32/0x4d [btrfs]
[ 556.512655] [<ffffffffa05cc7a1>] worker_loop+0x144/0x4c3 [btrfs]
[ 556.512661] [<ffffffff81059404>] ? finish_task_switch+0x80/0xb8
[ 556.512689] [<ffffffffa05cc65d>] ? btrfs_queue_worker+0x244/0x244 [btrfs]
[ 556.512695] [<ffffffff8104fa4e>] kthread+0x8d/0x95
[ 556.512699] [<ffffffff81050000>] ? bit_waitqueue+0x34/0x7d
[ 556.512704] [<ffffffff8104f9c1>] ? __kthread_parkme+0x65/0x65
[ 556.512709] [<ffffffff813c7eec>] ret_from_fork+0x7c/0xb0
[ 556.512713] [<ffffffff8104f9c1>] ? __kthread_parkme+0x65/0x65
Steps to reproduce:
# mkfs.btrfs -f <dev>
# mount -o nodatacow <dev> <mnt>
# touch <mnt>/<file>
# chattr =c <mnt>/<file>
# dd if=/dev/zero of=<mnt>/<file> bs=1M count=10
It is because we cleared the default compression type when setting the
nodatacow. In fact, we needn't do it because we have used COMPRESS flag to
indicate if we need compressed the file data or not, needn't use the
variant -- compress_type -- in btrfs_info to do the same thing, and just
use it to hold the default compression type. Or we would get a wrong compress
type for a file whose own compress flag is set but the compress flag of its
filesystem is not set.
Reported-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
Pull block layer fixes from Jens Axboe:
"A small collection of fixes for the current series. It contains:
- A fix for a use-after-free of a request in blk-mq. From Ming Lei
- A fix for a blk-mq bug that could attempt to dereference a NULL rq
if allocation failed
- Two xen-blkfront small fixes
- Cleanup of submit_bio_wait() type uses in the kernel, unifying
that. From Kent
- A fix for 32-bit blkg_rwstat reading. I apologize for this one
looking mangled in the shortlog, it's entirely my fault for missing
an empty line between the description and body of the text"
* 'for-linus' of git://git.kernel.dk/linux-block:
blk-mq: fix use-after-free of request
blk-mq: fix dereference of rq->mq_ctx if allocation fails
block: xen-blkfront: Fix possible NULL ptr dereference
xen-blkfront: Silence pfn maybe-uninitialized warning
block: submit_bio_wait() conversions
Update of blkg_stat and blkg_rwstat may happen in bh context
Currently notify_change directly updates i_version for size updates,
which not only is counter to how all other fields are updated through
struct iattr, but also breaks XFS, which need inode updates to happen
under its own lock, and synchronized to the structure that gets written
to the log.
Remove the update in the common code, and it to btrfs and ext4,
XFS already does a proper updaste internally and currently gets a
double update with the existing code.
IMHO this is 3.13 and -stable material and should go in through the XFS
tree.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Acked-by: Jan Kara <jack@suse.cz>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
btrfs bits got lost in the rebase
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Chris Mason <clm@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
It was being open coded in a few places.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Joern Engel <joern@logfs.org>
Cc: Prasad Joshi <prasadjoshi.linux@gmail.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Chris Mason <chris.mason@fusionio.com>
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
With immutable biovecs we don't want code accessing bi_io_vec directly -
the uses this patch changes weren't incorrect since they all own the
bio, but it makes the code harder to audit for no good reason - also,
this will help with multipage bvecs later.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Cc: Joern Engel <joern@logfs.org>
Cc: Prasad Joshi <prasadjoshi.linux@gmail.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
