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* Merge branch 'cleanups/for-4.4' of ↵Chris Mason2015-10-221-1/+1
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.4
| * btrfs: Fixed declaration of old_lenAlexandru Moise2015-10-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | old_len is used to store the return value of btrfs_item_size_nr(). The return value of btrfs_item_size_nr() is of type u32. To improve code correctness and avoid mixing signed and unsigned integers I've changed old_len to be of type u32 as well. Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com> Signed-off-by: David Sterba <dsterba@suse.com>
* | Merge branch 'anand/sysfs-updates-v4.3-rc3' of ↵Chris Mason2015-10-131-2/+2
|\ \ | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.4 Signed-off-by: Chris Mason <clm@fb.com>
| * | Btrfs: consolidate btrfs_error() to btrfs_std_error()Anand Jain2015-09-291-2/+2
| |/ | | | | | | | | | | | | | | | | | | | | | | | | btrfs_error() and btrfs_std_error() does the same thing and calls _btrfs_std_error(), so consolidate them together. And the main motivation is that btrfs_error() is closely named with btrfs_err(), one handles error action the other is to log the error, so don't closely name them. Signed-off-by: Anand Jain <anand.jain@oracle.com> Suggested-by: David Sterba <dsterba@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
* / btrfs: switch more printks to our helpersDavid Sterba2015-10-081-2/+3
|/ | | | | | | | | Convert the simple cases, not all functions provide a way to reach the fs_info. Also skipped debugging messages (print-tree, integrity checker and pr_debug) and messages that are printed from possibly unfinished mount. Signed-off-by: David Sterba <dsterba@suse.com>
* Btrfs: use bitfield instead of integer data type for the some variants in ↵Miao Xie2014-06-101-1/+1
| | | | | | | | btrfs_root Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
* btrfs: Use PTR_ERR_OR_ZEROSachin Kamat2014-03-101-1/+2
| | | | | | | | PTR_RET is deprecated. Use PTR_ERR_OR_ZERO instead. While at it also include missing err.h header. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Josef Bacik <jbacik@fb.com>
* Btrfs: convert printk to btrfs_ and fix BTRFS prefixFrank Holton2014-01-281-2/+2
| | | | | | | | | | Convert all applicable cases of printk and pr_* to the btrfs_* macros. Fix all uses of the BTRFS prefix. Signed-off-by: Frank Holton <fholton@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
* btrfs: expand btrfs_find_item() to include find_root_ref functionalityKelley Nielsen2014-01-281-15/+0
| | | | | | | | | | | | | | | | | | | | 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>
* Btrfs: insert orphan roots into fs radix treeMiao Xie2013-10-111-5/+3
| | | | | | | | | | | | Now we don't drop all the deleted snapshots/subvolumes before the space balance. It means we have to relocate the space which is held by the dead snapshots/subvolumes. So we must into them into fs radix tree, or we would forget to commit the change of them when doing transaction commit, and it would corrupt the metadata. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* Btrfs: Remove superfluous casts from u64 to unsigned long longGeert Uytterhoeven2013-09-011-2/+1
| | | | | | | | | u64 is "unsigned long long" on all architectures now, so there's no need to cast it when formatting it using the "ll" length modifier. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* btrfs: mark some local function as 'static'Sergei Trofimovich2013-09-011-2/+2
| | | | | | | | Cc: Josef Bacik <jbacik@fusionio.com> Cc: Chris Mason <chris.mason@fusionio.com> Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* btrfs: Cleanup for using BTRFS_SETGET_STACK instead of raw convertQu Wenruo2013-09-011-7/+7
| | | | | | | | | | | | | | Some codes still use the cpu_to_lexx instead of the BTRFS_SETGET_STACK_FUNCS declared in ctree.h. Also added some BTRFS_SETGET_STACK_FUNCS for btrfs_header btrfs_timespec and other structures. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Reviewed-by: Miao Xie <miaoxie@cn.fujitsu.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* Btrfs: cleanup orphaned root orphan itemJosef Bacik2013-07-021-2/+29
| | | | | | | | | | I hit a weird problem were my root item had been deleted but the orphan item had not. This isn't necessarily a problem, but it keeps the file system from being mounted. To fix this we just need to axe the orphan item if we can't find the fs root when we're putting them altogether. With this patch I was able to successfully mount my file system. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* Btrfs: remove unused code in btrfs_del_rootLiu Bo2013-06-141-4/+0
| | | | | | | 'leaf' and 'ri' is not used somehow. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* Btrfs: cleanup the similar code of the fs root readMiao Xie2013-06-141-117/+53
| | | | | | | | | | | | | | | | | There are several functions whose code is similar, such as btrfs_find_last_root() btrfs_read_fs_root_no_radix() Besides that, some functions are invoked twice, it is unnecessary, for example, we are sure that all roots which is found in btrfs_find_orphan_roots() have their orphan items, so it is unnecessary to check the orphan item again. So cleanup it. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* Btrfs: delete unused parameter to btrfs_read_root_item()Stefan Behrens2013-05-061-4/+3
| | | | | Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* Btrfs: rename root_times_lock to root_item_lockAnand Jain2012-12-171-2/+2
| | | | | | | | | Originally root_times_lock was introduced as part of send/receive code however newly developed patch to label the subvol reused the same lock, so renaming it for a meaningful name. Signed-off-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* btrfs: move transaction aborts to the point of failureDavid Sterba2012-10-091-12/+17
| | | | | | | | Call btrfs_abort_transaction as early as possible when an error condition is detected, that way the line number reported is useful and we're not clueless anymore which error path led to the abort. Signed-off-by: David Sterba <dsterba@suse.cz>
* Btrfs: fix some endian bugs handling the root timesDan Carpenter2012-08-281-2/+2
| | | | | | | "trans->transid" is cpu endian but we want to store the data as little endian. "item->ctime.nsec" is only 32 bits, not 64. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
* Btrfs: introduce subvol uuids and timesAlexander Block2012-07-251-6/+101
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces uuids for subvolumes. Each subvolume has it's own uuid. In case it was snapshotted, it also contains parent_uuid. In case it was received, it also contains received_uuid. It also introduces subvolume ctime/otime/stime/rtime. The first two are comparable to the times found in inodes. otime is the origin/creation time and ctime is the change time. stime/rtime are only valid on received subvolumes. stime is the time of the subvolume when it was sent. rtime is the time of the subvolume when it was received. Additionally to the times, we have a transid for each time. They are updated at the same place as the times. btrfs receive uses stransid and rtransid to find out if a received subvolume changed in the meantime. If an older kernel mounts a filesystem with the extented fields, all fields become invalid. The next mount with a new kernel will detect this and reset the fields. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
* btrfs: replace many BUG_ONs with proper error handlingJeff Mahoney2012-03-221-2/+10
| | | | | | | | | | | 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>
* btrfs: btrfs_update_root error push-upJeff Mahoney2012-03-221-1/+3
| | | | | | | 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>
* btrfs: Simplify btrfs_insert_rootJeff Mahoney2012-03-221-6/+3
| | | | | | | btrfs_insert_root is just a wrapper for btrfs_insert_item. Just return the error directly. Signed-off-by: Jeff Mahoney <jeffm@suse.com>
* btrfs: make btrfs_set_root_node voidMark Fasheh2011-08-011-3/+2
| | | | | | | | | | | This is fairly trivial - btrfs_set_root_node() - always returns zero so we can just make it void. All callers ignore the return code now anyway. I also made sure to check that none of the functions that btrfs_set_root_node() calls returns an error that we might have needed to catch and pass back. Signed-off-by: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Merge branch 'cleanups_and_fixes' into inode_numbersChris Mason2011-05-231-1/+5
|\ | | | | | | | | | | | | | | Conflicts: fs/btrfs/tree-log.c fs/btrfs/volumes.c Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: return error code to caller when btrfs_del_item failsTsutomu Itoh2011-05-231-1/+5
| | | | | | | | | | | | | | | | The error code is returned instead of calling BUG_ON when btrfs_del_item returns the error. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* | btrfs: remove all unused functionsDavid Sterba2011-05-061-47/+0
| | | | | | | | | | | | | | | | | | | | | | Remove static and global declarations and/or definitions. Reduces size of btrfs.ko by ~3.4kB. text data bss dec hex filename 402081 7464 200 409745 64091 btrfs.ko.base 398620 7144 200 405964 631cc btrfs.ko.remove-all Signed-off-by: David Sterba <dsterba@suse.cz>
* | btrfs: drop unused parameter from btrfs_release_pathDavid Sterba2011-05-021-5/+5
|/ | | | | | | | parameter tree root it's not used since commit 5f39d397dfbe140a14edecd4e73c34ce23c4f9ee ("Btrfs: Create extent_buffer interface for large blocksizes") Signed-off-by: David Sterba <dsterba@suse.cz>
* Btrfs: Fix uninitialized root flags for subvolumesLi Zefan2011-04-051-0/+18
| | | | | | | | | | | | | | | | | | root_item->flags and root_item->byte_limit are not initialized when a subvolume is created. This bug is not revealed until we added readonly snapshot support - now you mount a btrfs filesystem and you may find the subvolumes in it are readonly. To work around this problem, we steal a bit from root_item->inode_item->flags, and use it to indicate if those fields have been properly initialized. When we read a tree root from disk, we check if the bit is set, and if not we'll set the flag and initialize the two fields of the root item. Reported-by: Andreas Philipp <philipp.andreas@gmail.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Tested-by: Andreas Philipp <philipp.andreas@gmail.com> cc: stable@kernel.org Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: cleanup some BUG_ON()Tsutomu Itoh2011-03-281-2/+4
| | | | | | | | This patch changes some BUG_ON() to the error return. (but, most callers still use BUG_ON()) Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: cleanup warnings from gcc 4.6 (nonbugs)Andi Kleen2010-10-291-2/+0
| | | | | | | | | | | | | | These are all the cases where a variable is set, but not read which are not bugs as far as I can see, but simply leftovers. Still needs more review. Found by gcc 4.6's new warnings Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Chris Mason <chris.mason@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: avoid BUG when dropping root and reference in same transactionSage Weil2010-06-111-3/+0
| | | | | | | | | | | | | | | | | | | | If btrfs_ioctl_snap_destroy() deletes a snapshot but finishes with end_transaction(), the cleaner kthread may come in and drop the root in the same transaction. If that's the case, the root's refs still == 1 in the tree when btrfs_del_root() deletes the item, because commit_fs_roots() hasn't updated it yet (that happens during the commit). This wasn't a problem before only because btrfs_ioctl_snap_destroy() would commit the transaction before dropping the dentry reference, so the dead root wouldn't get queued up until after the fs root item was updated in the btree. Since it is not an error to drop the root reference and the root in the same transaction, just drop the BUG_ON() in btrfs_del_root(). Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Metadata reservation for orphan inodesYan, Zheng2010-05-251-3/+20
| | | | | | | reserve metadata space for handling orphan inodes Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: skip btrfs_release_path in btrfs_update_root and btrfs_del_rootLi Dongyang2009-11-111-2/+0
| | | | | | | | We don't need to call btrfs_release_path because btrfs_free_path will do that for us. Signed-off-by: Li Dongyang <Jerry87905@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: add snapshot/subvolume destroy ioctlYan, Zheng2009-09-211-5/+64
| | | | | | | | This patch adds snapshot/subvolume destroy ioctl. A subvolume that isn't being used and doesn't contains links to other subvolumes can be destroyed. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: change how subvolumes are organizedYan, Zheng2009-09-211-18/+51
| | | | | | | | | | | | | | | | | | | | | btrfs allows subvolumes and snapshots anywhere in the directory tree. If we snapshot a subvolume that contains a link to other subvolume called subvolA, subvolA can be accessed through both the original subvolume and the snapshot. This is similar to creating hard link to directory, and has the very similar problems. The aim of this patch is enforcing there is only one access point to each subvolume. Only the first directory entry (the one added when the subvolume/snapshot was created) is treated as valid access point. The first directory entry is distinguished by checking root forward reference. If the corresponding root forward reference is missing, we know the entry is not the first one. This patch also adds snapshot/subvolume rename support, the code allows rename subvolume link across subvolumes. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Mixed back reference (FORWARD ROLLING FORMAT CHANGE)Yan Zheng2009-06-101-6/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit introduces a new kind of back reference for btrfs metadata. Once a filesystem has been mounted with this commit, IT WILL NO LONGER BE MOUNTABLE BY OLDER KERNELS. When a tree block in subvolume tree is cow'd, the reference counts of all extents it points to are increased by one. At transaction commit time, the old root of the subvolume is recorded in a "dead root" data structure, and the btree it points to is later walked, dropping reference counts and freeing any blocks where the reference count goes to 0. The increments done during cow and decrements done after commit cancel out, and the walk is a very expensive way to go about freeing the blocks that are no longer referenced by the new btree root. This commit reduces the transaction overhead by avoiding the need for dead root records. When a non-shared tree block is cow'd, we free the old block at once, and the new block inherits old block's references. When a tree block with reference count > 1 is cow'd, we increase the reference counts of all extents the new block points to by one, and decrease the old block's reference count by one. This dead tree avoidance code removes the need to modify the reference counts of lower level extents when a non-shared tree block is cow'd. But we still need to update back ref for all pointers in the block. This is because the location of the block is recorded in the back ref item. We can solve this by introducing a new type of back ref. The new back ref provides information about pointer's key, level and in which tree the pointer lives. This information allow us to find the pointer by searching the tree. The shortcoming of the new back ref is that it only works for pointers in tree blocks referenced by their owner trees. This is mostly a problem for snapshots, where resolving one of these fuzzy back references would be O(number_of_snapshots) and quite slow. The solution used here is to use the fuzzy back references in the common case where a given tree block is only referenced by one root, and use the full back references when multiple roots have a reference on a given block. This commit adds per subvolume red-black tree to keep trace of cached inodes. The red-black tree helps the balancing code to find cached inodes whose inode numbers within a given range. This commit improves the balancing code by introducing several data structures to keep the state of balancing. The most important one is the back ref cache. It caches how the upper level tree blocks are referenced. This greatly reduce the overhead of checking back ref. The improved balancing code scales significantly better with a large number of snapshots. This is a very large commit and was written in a number of pieces. But, they depend heavily on the disk format change and were squashed together to make sure git bisect didn't end up in a bad state wrt space balancing or the format change. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix checkpatch.pl warningsChris Mason2009-01-061-10/+7
| | | | | | | There were many, most are fixed now. struct-funcs.c generates some warnings but these are bogus. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: make things static and include the right headersChristoph Hellwig2008-12-021-0/+2
| | | | | | | | Shut up various sparse warnings about symbols that should be either static or have their declarations in scope. Signed-off-by: Christoph Hellwig <hch@lst.de>
* Btrfs: prevent loops in the directory tree when creating snapshotsChris Mason2008-11-181-0/+16
| | | | | | | | | | | | | | | For a directory tree: /mnt/subvolA/subvolB btrfsctl -s /mnt/subvolA/subvolB /mnt Will create a directory loop with subvolA under subvolB. This commit uses the forward refs for each subvol and snapshot to error out before creating the loop. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add backrefs and forward refs for subvols and snapshotsChris Mason2008-11-181-1/+75
| | | | | | | | | | | | | Subvols and snapshots can now be referenced from any point in the directory tree. We need to maintain back refs for them so we can find lost subvols. Forward refs are added so that we know all of the subvols and snapshots referenced anywhere in the directory tree of a single subvol. This can be used to do recursive snapshotting (but they aren't yet) and it is also used to detect and prevent directory loops when creating new snapshots. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: add and improve commentsChris Mason2008-09-291-2/+19
| | | | | | | | | | | This improves the comments at the top of many functions. It didn't dive into the guts of functions because I was trying to avoid merging problems with the new allocator and back reference work. extent-tree.c and volumes.c were both skipped, and there is definitely more work todo in cleaning and commenting the code. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: update space balancing codeZheng Yan2008-09-261-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updates the space balancing code to utilize the new backref format. Before, btrfs-vol -b would break any COW links on data blocks or metadata. This was slow and caused the amount of space used to explode if a large number of snapshots were present. The new code can keeps the sharing of all data extents and most of the tree blocks. To maintain the sharing of data extents, the space balance code uses a seperate inode hold data extent pointers, then updates the references to point to the new location. To maintain the sharing of tree blocks, the space balance code uses reloc trees to relocate tree blocks in reference counted roots. There is one reloc tree for each subvol, and all reloc trees share same root key objectid. Reloc trees are snapshots of the latest committed roots of subvols (root->commit_root). To relocate a tree block referenced by a subvol, there are two steps. COW the block through subvol's reloc tree, then update block pointer in the subvol to point to the new block. Since all reloc trees share same root key objectid, doing special handing for tree blocks owned by them is easy. Once a tree block has been COWed in one reloc tree, we can use the resulting new block directly when the same block is required to COW again through other reloc trees. In this way, relocated tree blocks are shared between reloc trees, so they are also shared between subvols. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add a write ahead tree log to optimize synchronous operationsChris Mason2008-09-251-2/+3
| | | | | | | | | | | File syncs and directory syncs are optimized by copying their items into a special (copy-on-write) log tree. There is one log tree per subvolume and the btrfs super block points to a tree of log tree roots. After a crash, items are copied out of the log tree and back into the subvolume. See tree-log.c for all the details. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Various small fixes.Yan Zheng2008-09-251-2/+1
| | | | | | | | This trivial patch contains two locking fixes and a off by one fix. --- Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix deadlock while searching for dead roots on mountChris Mason2008-09-251-1/+9
| | | | | | | | | | btrfs_find_dead_roots called btrfs_read_fs_root_no_radix, which means we end up calling btrfs_search_slot with a path already held. The fix is to remember the key inside btrfs_find_dead_roots and drop the path. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Properly find the root for snapshotted blocks during chunk relocationChris Mason2008-09-251-1/+45
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Change st_blocksize to 4kChris Mason2008-09-251-1/+8
| | | | | | | Some programs (python) do rwm cycles at the granularity returned by stat. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Support for online FS resize (grow and shrink)Chris Mason2008-09-251-0/+5
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
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