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* Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds2010-03-18
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (30 commits) Btrfs: fix the inode ref searches done by btrfs_search_path_in_tree Btrfs: allow treeid==0 in the inode lookup ioctl Btrfs: return keys for large items to the search ioctl Btrfs: fix key checks and advance in the search ioctl Btrfs: buffer results in the space_info ioctl Btrfs: use __u64 types in ioctl.h Btrfs: fix search_ioctl key advance Btrfs: fix gfp flags masking in the compression code Btrfs: don't look at bio flags after submit_bio btrfs: using btrfs_stack_device_id() get devid btrfs: use memparse Btrfs: add a "df" ioctl for btrfs Btrfs: cache the extent state everywhere we possibly can V2 Btrfs: cache ordered extent when completing io Btrfs: cache extent state in find_delalloc_range Btrfs: change the ordered tree to use a spinlock instead of a mutex Btrfs: finish read pages in the order they are submitted btrfs: fix btrfs_mkdir goto for no free objectids Btrfs: flush data on snapshot creation Btrfs: make df be a little bit more understandable ...
| * Btrfs: fix the inode ref searches done by btrfs_search_path_in_treeChris Mason2010-03-18
| | | | | | | | | | | | | | | | | | | | | | This is used by the inode lookup ioctl to follow all the backrefs up to the subvol root. But the search being done would sometimes land one past the last item in the leaf instead of finding the backref. This changes the search to look for the highest possible backref and hop back one item. It also fixes a leaked path on failure to find the root. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: allow treeid==0 in the inode lookup ioctlChris Mason2010-03-18
| | | | | | | | | | | | | | | | | | | | | | When a root id of 0 is sent to the inode lookup ioctl, it will use the root of the file we're ioctling and pass the root id back to userland along with the results. This allows userland to do searches based on that root later on. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: return keys for large items to the search ioctlChris Mason2010-03-18
| | | | | | | | | | | | | | | | | | The search ioctl was skipping large items entirely (ones that are too big for the results buffer). This changes things to at least copy the item header so that we can send information about the item back to userland. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: fix key checks and advance in the search ioctlChris Mason2010-03-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The search ioctl was working well for finding tree roots, but using it for generic searches requires a few changes to how the keys are advanced. This treats the search control min fields for objectid, type and offset more like a key, where we drop the offset to zero once we bump the type, etc. The downside of this is that we are changing the min_type and min_offset fields during the search, and so the ioctl caller needs extra checks to make sure the keys in the result are the ones it wanted. This also changes key_in_sk to use btrfs_comp_cpu_keys, just to make things more readable. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: buffer results in the space_info ioctlChris Mason2010-03-16
| | | | | | | | | | | | | | | | The space_info ioctl was using copy_to_user inside rcu_read_lock. This commit changes things to copy into a buffer first and then dump the result down to userland. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: use __u64 types in ioctl.hSage Weil2010-03-16
| | | | | | | | | | Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: fix search_ioctl key advanceSage Weil2010-03-16
| | | | | | | | | | | | | | | | | | | | key->type is u8, not u64. fs/btrfs/ioctl.c: In function 'copy_to_sk': fs/btrfs/ioctl.c:1024: warning: comparison is always true due to limited range of data type Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: fix gfp flags masking in the compression codeNick Piggin2010-03-15
| | | | | | | | | | | | GFP_FS must be masked out, NOFS can't be or'd in. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: don't look at bio flags after submit_bioChris Mason2010-03-15
| | | | | | | | | | | | | | | | | | | | After callling submit_bio, the bio can be freed at any time. The btrfs submission thread helper was checking the bio flags too late, which might not give the correct answer. When CONFIG_DEBUG_PAGE_ALLOC is turned on, it can lead to oopsen. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * btrfs: using btrfs_stack_device_id() get devidXiao Guangrong2010-03-15
| | | | | | | | | | | | | | We can use btrfs_stack_device_id() to get dev_item->devid Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * btrfs: use memparseAkinobu Mita2010-03-15
| | | | | | | | | | | | | | | | | | Use memparse() instead of its own private implementation. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: linux-btrfs@vger.kernel.org Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: add a "df" ioctl for btrfsJosef Bacik2010-03-15
| | | | | | | | | | | | | | | | | | | | df is a very loaded question in btrfs. This gives us a way to get the per-space usage information so we can tell exactly what is in use where. This will help us figure out ENOSPC problems, and help users better understand where their disk space is going. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: cache the extent state everywhere we possibly can V2Josef Bacik2010-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch just goes through and fixes everybody that does lock_extent() blah unlock_extent() to use lock_extent_bits() blah unlock_extent_cached() and pass around a extent_state so we only have to do the searches once per function. This gives me about a 3 mb/s boots on my random write test. I have not converted some things, like the relocation and ioctl's, since they aren't heavily used and the relocation stuff is in the middle of being re-written. I also changed the clear_extent_bit() to only unset the cached state if we are clearing EXTENT_LOCKED and related stuff, so we can do things like this lock_extent_bits() clear delalloc bits unlock_extent_cached() without losing our cached state. I tested this thoroughly and turned on LEAK_DEBUG to make sure we weren't leaking extent states, everything worked out fine. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: cache ordered extent when completing ioJosef Bacik2010-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | When finishing io we run btrfs_dec_test_ordered_pending, and then immediately run btrfs_lookup_ordered_extent, but btrfs_dec_test_ordered_pending does that already, so we're searching twice when we don't have to. This patch lets us pass a btrfs_ordered_extent in to btrfs_dec_test_ordered_pending so if we do complete io on that ordered extent we can just use the one we found then instead of having to do another btrfs_lookup_ordered_extent. This made my fio job with the other patch go from 24 mb/s to 29 mb/s. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: cache extent state in find_delalloc_rangeJosef Bacik2010-03-15
| | | | | | | | | | | | | | | | | | This patch makes us cache the extent state we find in find_delalloc_range since we'll have to lock the extent later on in the function. This will keep us from re-searching for the rang when we try to lock the extent. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: change the ordered tree to use a spinlock instead of a mutexJosef Bacik2010-03-15
| | | | | | | | | | | | | | | | | | | | The ordered tree used to need a mutex, but currently all we use it for is to protect the rb_tree, and a spin_lock is just fine for that. Using a spin_lock instead makes dbench run a little faster, 58 mb/s instead of 51 mb/s, and have less latency, 3445.138 ms instead of 3820.633 ms. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: finish read pages in the order they are submittedChris Mason2010-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The endio is done at reverse order of bio vectors. That means for a sequential read, the page first submitted will finish last in a bio. Considering we will do checksum (making cache hot) for every page, this does introduce delay (and chance to squeeze cache used soon) for pages submitted at the begining. I don't observe obvious performance difference with below patch at my simple test, but seems more natural to finish read in the order they are submitted. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * btrfs: fix btrfs_mkdir goto for no free objectidsMiao Xie2010-03-15
| | | | | | | | | | | | | | | | btrfs_mkdir() must jump to the place of ending transaction after btrfs_find_free_objectid() failed. Or this transaction can't end. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: flush data on snapshot creationSage Weil2010-03-15
| | | | | | | | | | | | | | | | | | | | | | Flush any delalloc extents when we create a snapshot, so that recently written file data is always included in the snapshot. A later commit will add the ability to snapshot without the flush, but most people expect flushing. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: make df be a little bit more understandableJosef Bacik2010-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The way we report df usage is way confusing for everybody, including some other utilities (bacula for one). So this patch makes df a little bit more understandable. First we make used actually count the total amount of used space in all space info's. This will give us a real view of how much disk space is in use. Second, for blocks available, only count data space. This makes things like bacula work because it says 0 when you can no longer write anymore data to the disk. I think this is a nice compromise, since you will end up with something like the following [root@alpha ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 148G 30G 111G 21% / /dev/sda1 194M 116M 68M 64% /boot tmpfs 985M 12K 985M 1% /dev/shm /dev/mapper/VolGroup-LogVol02 145G 140G 0 100% /mnt/btrfs-test Compare this with btrfsctl -i output [root@alpha btrfs-progs-unstable]# ./btrfsctl -i /mnt/btrfs-test/ Metadata, DUP: total=4.62GB, used=2.46GB System, DUP: total=8.00MB, used=24.00KB Data: total=134.80GB, used=134.80GB Metadata: total=8.00MB, used=0.00 System: total=4.00MB, used=0.00 operation complete This way we show that there is no more data space to be used, but we have another 5GB of space left for metadata. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * btrfs: Update existing btrfs_device for renaming deviceTARUISI Hiroaki2010-03-15
| | | | | | | | | | | | | | | | | | | | | | | | When we scan devices in a multi-device filesystem, we memorize the original name. If the device gets a new name, later scans don't update the in-kernel structures related to it, and we're not able to mount the filesystem. This patch updates device name during scaning. Signed-off-by: TARUISI Hiroaki <taruishi.hiroak@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: add new defrag-range ioctl.Chris Mason2010-03-15
| | | | | | | | | | | | | | | | | | | | | | | | The btrfs defrag ioctl was limited to doing the entire file. This commit adds a new interface that can defrag a specific range inside the file. It can also force compression on the file, allowing you to selectively compress individual files after they were created, even when mount -o compress isn't turned on. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: be more selective in the defrag ioctlChris Mason2010-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The btrfs defrag ioctl had some bugs around delalloc accounting, and it wasn't properly skipping pages that were not in the mapping. It wasn't properly clearing the page checked flag, which could make the writeback code ignore the page forever while pinning it as dirty. This commit fixes those problems and makes defrag a little smarter. It skips holes and it doesn't waste time defragging large extents. If a tiny extent comes before a very large extent, it will defrag both of them to make sure the tiny extent ends up next to something big. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: run the backing dev more often in the submit_bio helperChris Mason2010-03-15
| | | | | | | | | | | | | | | | The submit_bio helper thread can decide to loop back around to service more bios. This commit forces it to unplug first, which helps reduce the latency seen by submitters. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: make subvolid=0 mount the original default rootJosef Bacik2010-03-15
| | | | | | | | | | | | | | | | | | | | Since theres not a good way to make sure the user sees the original default root tree id, and not to mention it's 5 so is way different than any other volume, just make subvol=0 mount the original default root. This makes it a bit easier for users to handle in the long run. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: add ioctl and incompat flag to set the default mount subvolJosef Bacik2010-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch needs to go along with my previous patch. This lets us set the default dir item's location to whatever root we want to use as our default mounting subvol. With this we don't have to use mount -o subvol=<tree id> anymore to mount a different subvol, we can just set the new one and it will just magically work. I've done some moderate testing with this, mostly just switching the default mount around, mounting subvols and the default mount at the same time and such, everything seems to work. Thanks, Older kernels would generally be able to still mount the filesystem with the default subvolume set, but it would result in a different volume being mounted, which could be an even more unpleasant suprise for users. So if you set your default subvolume, you can't go back to older kernels. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: change how we mount subvolumesJosef Bacik2010-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This work is in preperation for being able to set a different root as the default mounting root. There is currently a problem with how we mount subvolumes. We cannot currently mount a subvolume of a subvolume, you can only mount subvolumes/snapshots of the default subvolume. So say you take a snapshot of the default subvolume and call it snap1, and then take a snapshot of snap1 and call it snap2, so now you have / /snap1 /snap1/snap2 as your available volumes. Currently you can only mount / and /snap1, you cannot mount /snap1/snap2. To fix this problem instead of passing subvolid=<name> you must pass in subvolid=<treeid>, where <treeid> is the tree id that gets spit out via the subvolume listing you get from the subvolume listing patches (btrfs filesystem list). This allows us to mount /, /snap1 and /snap1/snap2 as the root volume. In addition to the above, we also now read the default dir item in the tree root to get the root key that it points to. For now this just points at what has always been the default subvolme, but later on I plan to change it to point at whatever root you want to be the new default root, so you can just set the default mount and not have to mount with -o subvolid=<treeid>. I tested this out with the above scenario and it worked perfectly. Thanks, mount -o subvol operates inside the selected subvolid. For example: mount -o subvol=snap1,subvolid=256 /dev/xxx /mnt /mnt will have the snap1 directory for the subvolume with id 256. mount -o subvol=snap /dev/xxx /mnt /mnt will be the snap directory of whatever the default subvolume is. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: make set/get functions for the super compat_ro flags use compat_roJosef Bacik2010-03-15
| | | | | | | | | | | | | | | | Our set/get functions for compat_ro_flags actually look at compat_flags. This will mess any attempt to use compat flags up. The fix is obvious. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: add search and inode lookup ioctlsChris Mason2010-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | The search ioctl is a generic tool for doing btree searches from userland applications. The first user of the search ioctl is a subvolume listing feature, but we'll also use it to find new files in a subvolume. The search ioctl allows you to specify min and max keys to search for, along with min and max transid. It returns the items along with a header that includes the item key. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: add a function to lookup a directory path by following backrefsTARUISI Hiroaki2010-03-15
| | | | | | | | | | | | | | This will be used by the inode lookup ioctl. Signed-off-by: TARUISI Hiroaki <taruishi.hiroak@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds2010-03-08
|\| | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: kfree correct pointer during mount option parsing Btrfs: use RB_ROOT to intialize rb_trees instead of setting rb_node to NULL
| * Btrfs: kfree correct pointer during mount option parsingJosef Bacik2010-03-08
| | | | | | | | | | | | | | | | | | We kstrdup the options string, but then strsep screws with the pointer, so when we kfree() it, we're not giving it the right pointer. Tested-by: Andy Lutomirski <luto@mit.edu> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: use RB_ROOT to intialize rb_trees instead of setting rb_node to NULLEric Paris2010-03-08
| | | | | | | | | | | | | | | | | | | | | | | | | | btrfs inialize rb trees in quite a number of places by settin rb_node = NULL; The problem with this is that 17d9ddc72fb8bba0d4f678 in the linux-next tree adds a new field to that struct which needs to be NULL for the new rbtree library code to work properly. This patch uses RB_ROOT as the intializer so all of the relevant fields will be NULL'd. Without the patch I get a panic. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* | Driver core: Constify struct sysfs_ops in struct kobj_typeEmese Revfy2010-03-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Constify struct sysfs_ops. This is part of the ops structure constification effort started by Arjan van de Ven et al. Benefits of this constification: * prevents modification of data that is shared (referenced) by many other structure instances at runtime * detects/prevents accidental (but not intentional) modification attempts on archs that enforce read-only kernel data at runtime * potentially better optimized code as the compiler can assume that the const data cannot be changed * the compiler/linker move const data into .rodata and therefore exclude them from false sharing Signed-off-by: Emese Revfy <re.emese@gmail.com> Acked-by: David Teigland <teigland@redhat.com> Acked-by: Matt Domsch <Matt_Domsch@dell.com> Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Acked-by: Hans J. Koch <hjk@linutronix.de> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Jens Axboe <jens.axboe@oracle.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | pass writeback_control to ->write_inodeChristoph Hellwig2010-03-05
| | | | | | | | | | | | | | | | | | | | This gives the filesystem more information about the writeback that is happening. Trond requested this for the NFS unstable write handling, and other filesystems might benefit from this too by beeing able to distinguish between the different callers in more detail. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds2010-02-15
|\| | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: btrfs_mark_extent_written uses the wrong slot
| * Btrfs: btrfs_mark_extent_written uses the wrong slotShaohua Li2010-02-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | My test do: fallocate a big file and do write. The file is 512M, but after file write is done btrfs-debug-tree shows: item 6 key (257 EXTENT_DATA 0) itemoff 3516 itemsize 53 extent data disk byte 1103101952 nr 536870912 extent data offset 0 nr 399634432 ram 536870912 extent compression 0 Looks like a regression introducted by 6c7d54ac87f338c479d9729e8392eca3f76e11e1, where we set wrong slot. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Acked-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds2010-02-05
|\| | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: apply updated fallocate i_size fix Btrfs: do not try and lookup the file extent when finishing ordered io Btrfs: Fix oopsen when dropping empty tree. Btrfs: remove BUG_ON() due to mounting bad filesystem Btrfs: make error return negative in btrfs_sync_file() Btrfs: fix race between allocate and release extent buffer.
| * Btrfs: apply updated fallocate i_size fixAneesh Kumar K.V2010-02-04
| | | | | | | | | | | | | | | | This version of the i_size fix for fallocate makes sure we only update the i_size when the current fallocate is really operating outside of i_size. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: do not try and lookup the file extent when finishing ordered ioJosef Bacik2010-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When running the following fio job [torrent] filename=torrent-test rw=randwrite size=4g filesize=4g bs=4k ioengine=sync you would see long stalls where no work was being done. That is because we were doing all this extra work to read in the file extent outside of the transaction, however in the random io case this ends up hurting us because the file extents are not there to begin with. So axe this logic, since we end up reading in the file extent when we go to update it anyway. This took the fio job from 11 mb/s with several ~10 second stalls to 24 mb/s to a couple of 1-2 second stalls. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: Fix oopsen when dropping empty tree.Yan, Zheng2010-02-04
| | | | | | | | | | | | | | | | | | When dropping a empty tree, walk_down_tree() skips checking extent information for the tree root. This will triggers a BUG_ON in walk_up_proc(). Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: remove BUG_ON() due to mounting bad filesystemMiao Xie2010-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Mounting a bad filesystem caused a BUG_ON(). The following is steps to reproduce it. # mkfs.btrfs /dev/sda2 # mount /dev/sda2 /mnt # mkfs.btrfs /dev/sda1 /dev/sda2 (the program says that /dev/sda2 was mounted, and then exits. ) # umount /mnt # mount /dev/sda1 /mnt At the third step, mkfs.btrfs exited in the way of make filesystem. So the initialization of the filesystem didn't finish. So the filesystem was bad, and it caused BUG_ON() when mounting it. But BUG_ON() should be called by the wrong code, not user's operation, so I think it is a bug of btrfs. This patch fixes it. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: make error return negative in btrfs_sync_file()Roel Kluin2010-02-04
| | | | | | | | | | | | | | It appears the error return should be negative Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: fix race between allocate and release extent buffer.Yan, Zheng2010-02-04
| | | | | | | | | | | | | | | | Increase extent buffer's reference count while holding the lock. Otherwise it can race with try_release_extent_buffer. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds2010-01-29
|\| | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: check total number of devices when removing missing Btrfs: check return value of open_bdev_exclusive properly Btrfs: do not mark the chunk as readonly if in degraded mode Btrfs: run orphan cleanup on default fs root Btrfs: fix a memory leak in btrfs_init_acl Btrfs: Use correct values when updating inode i_size on fallocate Btrfs: remove tree_search() in extent_map.c Btrfs: Add mount -o compress-force
| * Btrfs: check total number of devices when removing missingJosef Bacik2010-01-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If you have a disk failure in RAID1 and then add a new disk to the array, and then try to remove the missing volume, it will fail. The reason is the sanity check only looks at the total number of rw devices, which is just 2 because we have 2 good disks and 1 bad one. Instead check the total number of devices in the array to make sure we can actually remove the device. Tested this with a failed disk setup and with this test we can now run btrfs-vol -r missing /mount/point and it works fine. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: check return value of open_bdev_exclusive properlyJosef Bacik2010-01-28
| | | | | | | | | | | | | | | | | | | | | | Hit this problem while testing RAID1 failure stuff. open_bdev_exclusive returns ERR_PTR(), not NULL. So change the return value properly. This is important if you accidently specify a device that doesn't exist when trying to add a new device to an array, you will panic the box dereferencing bdev. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: do not mark the chunk as readonly if in degraded modeJosef Bacik2010-01-28
| | | | | | | | | | | | | | | | | | | | | | | | | | If a RAID setup has chunks that span multiple disks, and one of those disks has failed, btrfs_chunk_readonly will return 1 since one of the disks in that chunk's stripes is dead and therefore not writeable. So instead if we are in degraded mode, return 0 so we can go ahead and allocate stuff. Without this patch all of the block groups in a RAID1 setup will end up read-only, which will mean we can't add new disks to the array since we won't be able to make allocations. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * Btrfs: run orphan cleanup on default fs rootJosef Bacik2010-01-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch revert's commit 6c090a11e1c403b727a6a8eff0b97d5fb9e95cb5 Since it introduces this problem where we can run orphan cleanup on a volume that can have orphan entries re-added. Instead of my original fix, Yan Zheng pointed out that we can just revert my original fix and then run the orphan cleanup in open_ctree after we look up the fs_root. I have tested this with all the tests that gave me problems and this patch fixes both problems. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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