- 20 6月, 2017 3 次提交
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由 Jeff Mahoney 提交于
can_overcommit using the root to determine the allocation profile is the only use of a root in the call graph below reserve_metadata_bytes. It turns out that we only need to know whether the allocation is for the chunk root or not -- and we can pass that around as a bool instead. This allows us to pull root usage out of the reservation path all the way up to reserve_metadata_bytes itself, which uses it only to compare against fs_info->chunk_root to set the bool. In turn, this eliminates a bunch of races where we use a particular root too early in the mount process. Signed-off-by: NJeff Mahoney <jeffm@suse.com> Reviewed-by: NLiu Bo <bo.li.liu@oracle.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Jeff Mahoney 提交于
There are two places where we don't already know what kind of alloc profile we need before calling btrfs_get_alloc_profile, but we need access to a root everywhere we call it. This patch adds helpers for btrfs_{data,metadata,system}_alloc_profile() and relegates btrfs_system_alloc_profile to a static for use in those two cases. The next patch will eliminate one of those. Signed-off-by: NJeff Mahoney <jeffm@suse.com> Reviewed-by: NLiu Bo <bo.li.liu@oracle.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
The ->free_chunk_space variable is used to track the unallocated space and access to it is protected by a spinlock, which is not used for anything else. Make the code a bit self-explanatory by switching the variable to an atomic64_t type and kill the spinlock. Signed-off-by: NNikolay Borisov <nborisov@suse.com> [ not a performance critical code, use of atomic type is ok ] Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 01 6月, 2017 2 次提交
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由 Jeff Mahoney 提交于
If we have to recover relocation during mount, we'll ultimately have to evict the orphan inode. That goes through the reservation dance, where priority_reclaim_metadata_space and flush_space expect fs_info->fs_root to be valid. That's the next thing to be set up during mount, so we crash, almost always in flush_space trying to join the transaction but priority_reclaim_metadata_space is possible as well. This call path has been problematic in the past WRT whether ->fs_root is valid yet. Commit 957780eb (Btrfs: introduce ticketed enospc infrastructure) added new users that are called in the direct path instead of the async path that had already been worked around. The thing is that we don't actually need the fs_root, specifically, for anything. We either use it to determine whether the root is the chunk_root for use in choosing an allocation profile or as a root to pass btrfs_join_transaction before immediately committing it. Anything that isn't the chunk root works in the former case and any root works in the latter. A simple fix is to use a root we know will always be there: the extent_root. Cc: <stable@vger.kernel.org> # v4.8+ Fixes: 957780eb (Btrfs: introduce ticketed enospc infrastructure) Signed-off-by: NJeff Mahoney <jeffm@suse.com> Reviewed-by: NLiu Bo <bo.li.liu@oracle.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Jeff Mahoney 提交于
If we fail to add the space_info kobject, we'll leak the memory for the percpu counter. Fixes: 6ab0a202 (btrfs: publish allocation data in sysfs) Cc: <stable@vger.kernel.org> # v3.14+ Signed-off-by: NJeff Mahoney <jeffm@suse.com> Reviewed-by: NLiu Bo <bo.li.liu@oracle.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 18 4月, 2017 6 次提交
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由 Qu Wenruo 提交于
Unlike mirror based profiles, RAID5/6 recovery needs to read out the whole full stripe. And if we don't do proper protection, it can easily cause race condition. Introduce 2 new functions: lock_full_stripe() and unlock_full_stripe() for RAID5/6. Which store a rb_tree of mutexes for full stripes, so scrub callers can use them to lock a full stripe to avoid race. Signed-off-by: NQu Wenruo <quwenruo@cn.fujitsu.com> Reviewed-by: NLiu Bo <bo.li.liu@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> [ minor comment adjustments ] Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The members have been effectively unused since "Btrfs: rework qgroup accounting" (fcebe456), there's no substitute for assert_qgroups_uptodate so it's removed as well. Reviewed-by: NQu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Liu Bo 提交于
We also don't bother to flush free space cache while with free space tree. Cc: David Sterba <dsterba@suse.cz> Signed-off-by: NLiu Bo <bo.li.liu@oracle.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Elena Reshetova 提交于
refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: NElena Reshetova <elena.reshetova@intel.com> Signed-off-by: NHans Liljestrand <ishkamiel@gmail.com> Signed-off-by: NKees Cook <keescook@chromium.org> Signed-off-by: NDavid Windsor <dwindsor@gmail.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Elena Reshetova 提交于
refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: NElena Reshetova <elena.reshetova@intel.com> Signed-off-by: NHans Liljestrand <ishkamiel@gmail.com> Signed-off-by: NKees Cook <keescook@chromium.org> Signed-off-by: NDavid Windsor <dwindsor@gmail.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Elena Reshetova 提交于
refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: NElena Reshetova <elena.reshetova@intel.com> Signed-off-by: NHans Liljestrand <ishkamiel@gmail.com> Signed-off-by: NKees Cook <keescook@chromium.org> Signed-off-by: NDavid Windsor <dwindsor@gmail.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 02 3月, 2017 1 次提交
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由 Ingo Molnar 提交于
Instead of including the full <linux/signal.h>, we are going to include the types-only <linux/signal_types.h> header in <linux/sched.h>, to further decouple the scheduler header from the signal headers. This means that various files which relied on the full <linux/signal.h> need to be updated to gain an explicit dependency on it. Update the code that relies on sched.h's inclusion of the <linux/signal.h> header. Acked-by: NLinus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: NIngo Molnar <mingo@kernel.org>
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- 28 2月, 2017 9 次提交
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由 Nikolay Borisov 提交于
Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 24 2月, 2017 1 次提交
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由 Filipe Manana 提交于
At close_ctree() we free the block groups and then only after we wait for any running worker kthreads to finish and shutdown the workqueues. This behaviour is racy and it triggers an assertion failure when freeing block groups because while we are doing it we can have for example a block group caching kthread running, and in that case the block group's reference count can still be greater than 1 by the time we assert its reference count is 1, leading to an assertion failure: [19041.198004] assertion failed: atomic_read(&block_group->count) == 1, file: fs/btrfs/extent-tree.c, line: 9799 [19041.200584] ------------[ cut here ]------------ [19041.201692] kernel BUG at fs/btrfs/ctree.h:3418! [19041.202830] invalid opcode: 0000 [#1] PREEMPT SMP [19041.203929] Modules linked in: btrfs xor raid6_pq dm_flakey dm_mod crc32c_generic ppdev sg psmouse acpi_cpufreq pcspkr parport_pc evdev tpm_tis parport tpm_tis_core i2c_piix4 i2c_core tpm serio_raw processor button loop autofs4 ext4 crc16 jbd2 mbcache sr_mod cdrom sd_mod ata_generic virtio_scsi ata_piix virtio_pci libata virtio_ring virtio e1000 scsi_mod floppy [last unloaded: btrfs] [19041.208082] CPU: 6 PID: 29051 Comm: umount Not tainted 4.9.0-rc7-btrfs-next-36+ #1 [19041.208082] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014 [19041.208082] task: ffff88015f028980 task.stack: ffffc9000ad34000 [19041.208082] RIP: 0010:[<ffffffffa03e319e>] [<ffffffffa03e319e>] assfail.constprop.41+0x1c/0x1e [btrfs] [19041.208082] RSP: 0018:ffffc9000ad37d60 EFLAGS: 00010286 [19041.208082] RAX: 0000000000000061 RBX: ffff88015ecb4000 RCX: 0000000000000001 [19041.208082] RDX: ffff88023f392fb8 RSI: ffffffff817ef7ba RDI: 00000000ffffffff [19041.208082] RBP: ffffc9000ad37d60 R08: 0000000000000001 R09: 0000000000000000 [19041.208082] R10: ffffc9000ad37cb0 R11: ffffffff82f2b66d R12: ffff88023431d170 [19041.208082] R13: ffff88015ecb40c0 R14: ffff88023431d000 R15: ffff88015ecb4100 [19041.208082] FS: 00007f44f3d42840(0000) GS:ffff88023f380000(0000) knlGS:0000000000000000 [19041.208082] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [19041.208082] CR2: 00007f65d623b000 CR3: 00000002166f2000 CR4: 00000000000006e0 [19041.208082] Stack: [19041.208082] ffffc9000ad37d98 ffffffffa035989f ffff88015ecb4000 ffff88015ecb5630 [19041.208082] ffff88014f6be000 0000000000000000 00007ffcf0ba6a10 ffffc9000ad37df8 [19041.208082] ffffffffa0368cd4 ffff88014e9658e0 ffffc9000ad37e08 ffffffff811a634d [19041.208082] Call Trace: [19041.208082] [<ffffffffa035989f>] btrfs_free_block_groups+0x17f/0x392 [btrfs] [19041.208082] [<ffffffffa0368cd4>] close_ctree+0x1c5/0x2e1 [btrfs] [19041.208082] [<ffffffff811a634d>] ? evict_inodes+0x132/0x141 [19041.208082] [<ffffffffa034356d>] btrfs_put_super+0x15/0x17 [btrfs] [19041.208082] [<ffffffff8118fc32>] generic_shutdown_super+0x6a/0xeb [19041.208082] [<ffffffff8119004f>] kill_anon_super+0x12/0x1c [19041.208082] [<ffffffffa0343370>] btrfs_kill_super+0x16/0x21 [btrfs] [19041.208082] [<ffffffff8118fad1>] deactivate_locked_super+0x3b/0x68 [19041.208082] [<ffffffff8118fb34>] deactivate_super+0x36/0x39 [19041.208082] [<ffffffff811a9946>] cleanup_mnt+0x58/0x76 [19041.208082] [<ffffffff811a99a2>] __cleanup_mnt+0x12/0x14 [19041.208082] [<ffffffff81071573>] task_work_run+0x6f/0x95 [19041.208082] [<ffffffff81001897>] prepare_exit_to_usermode+0xa3/0xc1 [19041.208082] [<ffffffff81001a23>] syscall_return_slowpath+0x16e/0x1d2 [19041.208082] [<ffffffff814c607d>] entry_SYSCALL_64_fastpath+0xab/0xad [19041.208082] Code: c7 ae a0 3e a0 48 89 e5 e8 4e 74 d4 e0 0f 0b 55 89 f1 48 c7 c2 0b a4 3e a0 48 89 fe 48 c7 c7 a4 a6 3e a0 48 89 e5 e8 30 74 d4 e0 <0f> 0b 55 31 d2 48 89 e5 e8 d5 b9 f7 ff 5d c3 48 63 f6 55 31 c9 [19041.208082] RIP [<ffffffffa03e319e>] assfail.constprop.41+0x1c/0x1e [btrfs] [19041.208082] RSP <ffffc9000ad37d60> [19041.279264] ---[ end trace 23330586f16f064d ]--- This started happening as of kernel 4.8, since commit f3bca802 ("Btrfs: add ASSERT for block group's memory leak") introduced these assertions. So fix this by freeing the block groups only after waiting for all worker kthreads to complete and shutdown the workqueues. Signed-off-by: NFilipe Manana <fdmanana@suse.com> Reviewed-by: NLiu Bo <bo.li.liu@oracle.com>
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- 17 2月, 2017 9 次提交
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由 Jeff Mahoney 提交于
The free space cache APIs accept a root but always use the tree root. Also, btrfs_truncate_free_space_cache accepts a root AND an inode but the inode always points to the root anyway, so let's just pass the inode. Signed-off-by: NJeff Mahoney <jeffm@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Jeff Mahoney 提交于
btrfs_inc_block_group_ro is either passed the extent root or the dev root, but it doesn't do anything with the dev tree. Let's convert to passing an fs_info and using the extent root. Signed-off-by: NJeff Mahoney <jeffm@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Jeff Mahoney 提交于
We don't need to pass a root to flush_space since it always uses the fs_root. Signed-off-by: NJeff Mahoney <jeffm@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Jeff Mahoney 提交于
Outside of interactions with qgroups, the roots passed in extent-tree.c are usually passed to ensure that we don't do refcounts on log trees or to get the allocation profile for an allocation request. Otherwise, it operates on the extent root. This patch converts some more routines in extent-tree.c that are always called with the extent root to accept an fs_info instead. Signed-off-by: NJeff Mahoney <jeffm@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
Added but never used. Reviewed-by: NLiu Bo <bo.li.liu@oracle.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
Unused since qgroup refactoring that split data and metadata accounting, the btrfs_qgroup_free helper. Reviewed-by: NLiu Bo <bo.li.liu@oracle.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
Added but never needed. Reviewed-by: NLiu Bo <bo.li.liu@oracle.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Liu Bo 提交于
This uses a helper instead of open code around used byte of space_info everywhere. Signed-off-by: NLiu Bo <bo.li.liu@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Liu Bo 提交于
We don't need to take the lock if the block group has not been cached. Signed-off-by: NLiu Bo <bo.li.liu@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 14 2月, 2017 8 次提交
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由 Liu Bo 提交于
run_delalloc_nocow has used trans in two places where they don't actually need @trans. For btrfs_lookup_file_extent, we search for file extents without COWing anything, and for btrfs_cross_ref_exist, the only place where we need @trans is deferencing it in order to get running_transaction which we could easily get from the global fs_info. Signed-off-by: NLiu Bo <bo.li.liu@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Liu Bo 提交于
All we need is @delayed_refs, all callers have get it ahead of calling btrfs_find_delayed_ref_head since lock needs to be acquired firstly, there is no reason to deference it again inside the function. Signed-off-by: NLiu Bo <bo.li.liu@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Jeff Mahoney 提交于
Once a qgroup limit is exceeded, it's impossible to restore normal operation to the subvolume without modifying the limit or removing the subvolume. This is a surprising situation for many users used to the typical workflow with quotas on other file systems where it's possible to remove files until the used space is back under the limit. When we go to unlink a file and start the transaction, we'll hit the qgroup limit while trying to reserve space for the items we'll modify while removing the file. We discussed last month how best to handle this situation and agreed that there is no perfect solution. The best principle-of-least-surprise solution is to handle it similarly to how we already handle ENOSPC when unlinking, which is to allow the operation to succeed with the expectation that it will ultimately release space under most circumstances. This patch modifies the transaction start path to select whether to honor the qgroups limits. btrfs_start_transaction_fallback_global_rsv is the only caller that skips enforcement. The reservation and tracking still happens normally -- it just skips the enforcement step. Signed-off-by: NJeff Mahoney <jeffm@suse.com> Reviewed-by: NQu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Omar Sandoval 提交于
In a lot of places, it's unclear when it's safe to reuse a struct btrfs_key after it has been passed to a helper function. Constify these arguments wherever possible to make it obvious. Signed-off-by: NOmar Sandoval <osandov@fb.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
This goes as a separate patch because fixing that inside the patches caused too many many conflicts. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Currently btrfs_ino takes a struct inode and this causes a lot of internal btrfs functions which consume this ino to take a VFS inode, rather than btrfs' own struct btrfs_inode. In order to fix this "leak" of VFS structs into the internals of btrfs first it's necessary to eliminate all uses of struct inode for the purpose of inode. This patch does that by using BTRFS_I to convert an inode to btrfs_inode. With this problem eliminated subsequent patches will start eliminating the passing of struct inode altogether, eventually resulting in a lot cleaner code. Signed-off-by: NNikolay Borisov <n.borisov.lkml@gmail.com> [ fix btrfs_get_extent tracepoint prototype ] Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The expression is open-coded in several places, this asks for a wrapper. As we know the MAX_EXTENT fits to u32, we can use the appropirate division helper. This cascades to the result type updates. Compiler is clever enough to use shift instead of integer division, so there's no change in the generated assembly. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Jeff Mahoney 提交于
btrfs_add_delayed_data_ref is always called with a NULL extent_op, so let's drop the argument. Signed-off-by: NJeff Mahoney <jeffm@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 03 1月, 2017 1 次提交
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由 Liu Bo 提交于
If @block_group is not @used_bg, it'll try to get @used_bg's lock without droping @block_group 's lock and lockdep has throwed a scary deadlock warning about it. Fix it by using down_read_nested. Signed-off-by: NLiu Bo <bo.li.liu@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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