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2020-02-08Merge branch 'work.misc' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull misc vfs updates from Al Viro: - bmap series from cmaiolino - getting rid of convolutions in copy_mount_options() (use a couple of copy_from_user() instead of the __get_user() crap) * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: saner copy_mount_options() fibmap: Reject negative block numbers fibmap: Use bmap instead of ->bmap method in ioctl_fibmap ecryptfs: drop direct calls to ->bmap cachefiles: drop direct usage of ->bmap method. fs: Enable bmap() function to properly return errors
2020-02-04proc: convert everything to "struct proc_ops"Alexey Dobriyan
The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in seq_file.h. Conversion rule is: llseek => proc_lseek unlocked_ioctl => proc_ioctl xxx => proc_xxx delete ".owner = THIS_MODULE" line [akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c] [sfr@canb.auug.org.au: fix kernel/sched/psi.c] Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-03fs: Enable bmap() function to properly return errorsCarlos Maiolino
By now, bmap() will either return the physical block number related to the requested file offset or 0 in case of error or the requested offset maps into a hole. This patch makes the needed changes to enable bmap() to proper return errors, using the return value as an error return, and now, a pointer must be passed to bmap() to be filled with the mapped physical block. It will change the behavior of bmap() on return: - negative value in case of error - zero on success or map fell into a hole In case of a hole, the *block will be zero too Since this is a prep patch, by now, the only error return is -EINVAL if ->bmap doesn't exist. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-01-25jbd2: clean __jbd2_journal_abort_hard() and __journal_abort_soft()zhangyi (F)
__jbd2_journal_abort_hard() is no longer used, so now we can merge __jbd2_journal_abort_hard() and __journal_abort_soft() these two functions into jbd2_journal_abort() and remove them. Signed-off-by: zhangyi (F) <yi.zhang@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191204124614.45424-5-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-01-25jbd2: make sure ESHUTDOWN to be recorded in the journal superblockzhangyi (F)
Commit fb7c02445c49 ("ext4: pass -ESHUTDOWN code to jbd2 layer") want to allow jbd2 layer to distinguish shutdown journal abort from other error cases. So the ESHUTDOWN should be taken precedence over any other errno which has already been recoded after EXT4_FLAGS_SHUTDOWN is set, but it only update errno in the journal suoerblock now if the old errno is 0. Fixes: fb7c02445c49 ("ext4: pass -ESHUTDOWN code to jbd2 layer") Signed-off-by: zhangyi (F) <yi.zhang@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191204124614.45424-4-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-01-25ext4, jbd2: ensure panic when aborting with zero errnozhangyi (F)
JBD2_REC_ERR flag used to indicate the errno has been updated when jbd2 aborted, and then __ext4_abort() and ext4_handle_error() can invoke panic if ERRORS_PANIC is specified. But if the journal has been aborted with zero errno, jbd2_journal_abort() didn't set this flag so we can no longer panic. Fix this by always record the proper errno in the journal superblock. Fixes: 4327ba52afd03 ("ext4, jbd2: ensure entering into panic after recording an error in superblock") Signed-off-by: zhangyi (F) <yi.zhang@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191204124614.45424-3-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-01-25jbd2: switch to use jbd2_journal_abort() when failed to submit the commit recordzhangyi (F)
We invoke jbd2_journal_abort() to abort the journal and record errno in the jbd2 superblock when committing journal transaction besides the failure on submitting the commit record. But there is no need for the case and we can also invoke jbd2_journal_abort() instead of __jbd2_journal_abort_hard(). Fixes: 818d276ceb83a ("ext4: Add the journal checksum feature") Signed-off-by: zhangyi (F) <yi.zhang@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191204124614.45424-2-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-01-25jbd2_seq_info_next should increase position indexVasily Averin
if seq_file .next fuction does not change position index, read after some lseek can generate unexpected output. Script below generates endless output $ q=;while read -r r;do echo "$((++q)) $r";done </proc/fs/jbd2/DEV/info https://bugzilla.kernel.org/show_bug.cgi?id=206283 Fixes: 1f4aace60b0e ("fs/seq_file.c: simplify seq_file iteration code and interface") Cc: stable@kernel.org Signed-off-by: Vasily Averin <vvs@virtuozzo.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/d13805e5-695e-8ac3-b678-26ca2313629f@virtuozzo.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-01-25jbd2: remove pointless assertion in __journal_remove_journal_headShijie Luo
Only when jh->b_jcount = 0 in jbd2_journal_put_journal_head, we are allowed to call __journal_remove_journal_head. This assertion is meaningless, just remove it. Signed-off-by: Shijie Luo <luoshijie1@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20200123070054.50585-1-luoshijie1@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-01-25ext4,jbd2: fix comment and code styleShijie Luo
Fix comment and remove unneccessary blank. Signed-off-by: Shijie Luo <luoshijie1@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20200123064325.36358-1-luoshijie1@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-01-25jbd2: delete the duplicated words in the commentswangyan
Delete the duplicated words "is" in the comments Signed-off-by: Yan Wang <wangyan122@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/12087f77-ab4d-c7ba-53b4-893dbf0026f0@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-01-17jbd2: clear JBD2_ABORT flag before journal_reset to update log tail info ↵Kai Li
when load journal If the journal is dirty when the filesystem is mounted, jbd2 will replay the journal but the journal superblock will not be updated by journal_reset() because JBD2_ABORT flag is still set (it was set in journal_init_common()). This is problematic because when a new transaction is then committed, it will be recorded in block 1 (journal->j_tail was set to 1 in journal_reset()). If unclean shutdown happens again before the journal superblock is updated, the new recorded transaction will not be replayed during the next mount (because of stale sb->s_start and sb->s_sequence values) which can lead to filesystem corruption. Fixes: 85e0c4e89c1b ("jbd2: if the journal is aborted then don't allow update of the log tail") Signed-off-by: Kai Li <li.kai4@h3c.com> Link: https://lore.kernel.org/r/20200111022542.5008-1-li.kai4@h3c.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-30Merge tag 'ext4_for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 updates from Ted Ts'o: "This merge window saw the the following new featuers added to ext4: - Direct I/O via iomap (required the iomap-for-next branch from Darrick as a prereq). - Support for using dioread-nolock where the block size < page size. - Support for encryption for file systems where the block size < page size. - Rework of journal credits handling so a revoke-heavy workload will not cause the journal to run out of space. - Replace bit-spinlocks with spinlocks in jbd2 Also included were some bug fixes and cleanups, mostly to clean up corner cases from fuzzed file systems and error path handling" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (59 commits) ext4: work around deleting a file with i_nlink == 0 safely ext4: add more paranoia checking in ext4_expand_extra_isize handling jbd2: make jbd2_handle_buffer_credits() handle reserved handles ext4: fix a bug in ext4_wait_for_tail_page_commit ext4: bio_alloc with __GFP_DIRECT_RECLAIM never fails ext4: code cleanup for get_next_id ext4: fix leak of quota reservations ext4: remove unused variable warning in parse_options() ext4: Enable encryption for subpage-sized blocks fs/buffer.c: support fscrypt in block_read_full_page() ext4: Add error handling for io_end_vec struct allocation jbd2: Fine tune estimate of necessary descriptor blocks jbd2: Provide trace event for handle restarts ext4: Reserve revoke credits for freed blocks jbd2: Make credit checking more strict jbd2: Rename h_buffer_credits to h_total_credits jbd2: Reserve space for revoke descriptor blocks jbd2: Drop jbd2_space_needed() jbd2: Account descriptor blocks into t_outstanding_credits jbd2: Factor out common parts of stopping and restarting a handle ...
2019-11-05Merge branch 'jk/jbd2-revoke-overflow'Theodore Ts'o
2019-11-05jbd2: Fine tune estimate of necessary descriptor blocksJan Kara
Currently we reserve j_max_transaction_buffers / 32 for transaction descriptor blocks. Now that revoke descriptors are accounted for separately this estimate is unnecessarily high and we can actually compute much tighter estimate. In the common case of 32k journal blocks and 4k blocksize this actually reduces the amount of reserved descriptor blocks from 256 to ~25 which allows us to fit more real data into a transaction. Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-25-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Provide trace event for handle restartsJan Kara
Provide trace event for handle restarts to ease debugging. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-24-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Make credit checking more strictJan Kara
Make checking of available credits in jbd2_journal_dirty_metadata() more strict. There should be always enough credits in the handle to write all potential revoke descriptors. Also we warn in case there are not enough credits since this is a bug in the filesystem. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-22-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Rename h_buffer_credits to h_total_creditsJan Kara
The credit counter now contains both buffer and revoke descriptor block credits. Rename to counter to h_total_credits to reflect that. No functional change. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-21-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Reserve space for revoke descriptor blocksJan Kara
Extend functions for starting, extending, and restarting transaction handles to take number of revoke records handle must be able to accommodate. These functions then make sure transaction has enough credits to be able to store resulting revoke descriptor blocks. Also revoke code tracks number of revoke records created by a handle to catch situation where some place didn't reserve enough space for revoke records. Similarly to standard transaction credits, space for unused reserved revoke records is released when the handle is stopped. On the ext4 side we currently take a simplistic approach of reserving space for 1024 revoke records for any transaction. This grows amount of credits reserved for each handle only by a few and is enough for any normal workload so that we don't hit warnings in jbd2. We will refine the logic in following commits. Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-20-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Drop jbd2_space_needed()Jan Kara
The function is now just a trivial wrapper returning journal->j_max_transaction_buffers. Drop it. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-19-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Account descriptor blocks into t_outstanding_creditsJan Kara
Currently, journal descriptor blocks were not accounted in transaction->t_outstanding_credits and we were just leaving some slack space in the journal for them (in jbd2_log_space_left() and jbd2_space_needed()). This is making proper accounting (and reservation we want to add) of descriptor blocks difficult so switch to accounting descriptor blocks in transaction->t_outstanding_credits and just reserve the same amount of credits in t_outstanding credits for journal descriptor blocks when creating transaction. Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-18-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Factor out common parts of stopping and restarting a handleJan Kara
jbd2__journal_restart() has quite some code that is common with jbd2_journal_stop(). Factor this functionality into stop_this_handle() helper and use it from both functions. Note that this also drops t_handle_lock protection from jbd2__journal_restart() as jbd2_journal_stop() does the same thing without it. Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-17-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Drop pointless wakeup from jbd2_journal_stop()Jan Kara
When we drop last handle from a transaction and journal->j_barrier_count > 0, jbd2_journal_stop() wakes up journal->j_wait_transaction_locked wait queue. This looks pointless - wait for outstanding handles always happens on journal->j_wait_updates waitqueue. journal->j_wait_transaction_locked is used to wait for transaction state changes and by start_this_handle() for waiting until journal->j_barrier_count drops to 0. The first case is clearly irrelevant here since only jbd2 thread changes transaction state. The second case looks related but jbd2_journal_unlock_updates() is responsible for the wakeup in this case. So just drop the wakeup. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-16-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Drop pointless check from jbd2_journal_stop()Jan Kara
If a transaction is larger than journal->j_max_transaction_buffers, that is a bug and not a trigger for transaction commit. Also the very next attempt to start new handle will start transaction commit anyway. So just remove the pointless check. Arguably, we could start transaction commit whenever the transaction size is *close* to journal->j_max_transaction_buffers. This has a potential to reduce latency of the next jbd2_journal_start() at the cost of somewhat smaller transactions. However for this to have any effect, it would mean that there isn't someone already waiting in jbd2_journal_start() which means metadata load for the fs is pretty light anyway so probably this optimization is not worth it. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-15-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Reorganize jbd2_journal_stop()Jan Kara
Move code in jbd2_journal_stop() around a bit. It removes some unnecessary code duplication and will make factoring out parts common with jbd2__journal_restart() easier. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-14-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Fix statistics for the number of logged blocksJan Kara
jbd2 statistics counting number of blocks logged in a transaction was wrong. It didn't count the commit block and more importantly it didn't count revoke descriptor blocks. Make sure these get properly counted. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-13-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Completely fill journal descriptor blocksJan Kara
With 32-bit block numbers, we don't allocate the array for journal buffer heads large enough for corresponding descriptor tags to fill the descriptor block. Thus we end up writing out half-full descriptor blocks to the journal unnecessarily growing the transaction. Fix the logic to allocate the array large enough. Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-3-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-11-05jbd2: Fixup stale comment in commit codeJan Kara
jbd2_journal_next_log_block() does not look at transaction->t_outstanding_credits. Remove the misleading comment. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-2-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-10-21jbd2: Free journal head outside of locked regionThomas Gleixner
On PREEMPT_RT bit-spinlocks have the same semantics as on PREEMPT_RT=n, i.e. they disable preemption. That means functions which are not safe to be called in preempt disabled context on RT trigger a might_sleep() assert. The journal head bit spinlock is mostly held for short code sequences with trivial RT safe functionality, except for one place: jbd2_journal_put_journal_head() invokes __journal_remove_journal_head() with the journal head bit spinlock held. __journal_remove_journal_head() invokes kmem_cache_free() which must not be called with preemption disabled on RT. Jan suggested to rework the removal function so the actual free happens outside the bit-spinlocked region. Split it into two parts: - Do the sanity checks and the buffer head detach under the lock - Do the actual free after dropping the lock There is error case handling in the free part which needs to dereference the b_size field of the now detached buffer head. Due to paranoia (caused by ignorance) the size is retrieved in the detach function and handed into the free function. Might be over-engineered, but better safe than sorry. This makes the journal head bit-spinlock usage RT compliant and also avoids nested locking which is not covered by lockdep. Suggested-by: Jan Kara <jack@suse.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-ext4@vger.kernel.org Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Jan Kara <jack@suse.com> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20190809124233.13277-8-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-10-21jbd2: Make state lock a spinlockThomas Gleixner
Bit-spinlocks are problematic on PREEMPT_RT if functions which might sleep on RT, e.g. spin_lock(), alloc/free(), are invoked inside the lock held region because bit spinlocks disable preemption even on RT. A first attempt was to replace state lock with a spinlock placed in struct buffer_head and make the locking conditional on PREEMPT_RT and DEBUG_BIT_SPINLOCKS. Jan pointed out that there is a 4 byte hole in struct journal_head where a regular spinlock fits in and he would not object to convert the state lock to a spinlock unconditionally. Aside of solving the RT problem, this also gains lockdep coverage for the journal head state lock (bit-spinlocks are not covered by lockdep as it's hard to fit a lockdep map into a single bit). The trivial change would have been to convert the jbd_*lock_bh_state() inlines, but that comes with the downside that these functions take a buffer head pointer which needs to be converted to a journal head pointer which adds another level of indirection. As almost all functions which use this lock have a journal head pointer readily available, it makes more sense to remove the lock helper inlines and write out spin_*lock() at all call sites. Fixup all locking comments as well. Suggested-by: Jan Kara <jack@suse.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jan Kara <jack@suse.cz> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Jan Kara <jack@suse.com> Cc: linux-ext4@vger.kernel.org Link: https://lore.kernel.org/r/20190809124233.13277-7-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-10-21jbd2: Don't call __bforget() unnecessarilyJan Kara
jbd2_journal_forget() jumps to 'not_jbd' branch which calls __bforget() in cases where the buffer is clean which is pointless. In case of failed assertion, it can be even argued that it is safer not to touch buffer's dirty bits. Also logically it makes more sense to just jump to 'drop' and that will make logic also simpler when we switch bh_state_lock to a spinlock. Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20190809124233.13277-6-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-10-21jbd2: Drop unnecessary branch from jbd2_journal_forget()Jan Kara
We have cleared both dirty & jbddirty bits from the bh. So there's no difference between bforget() and brelse(). Thus there's no point jumping to no_jbd branch. Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20190809124233.13277-5-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-10-21jbd2: Move dropping of jh reference out of un/re-filing functionsJan Kara
__jbd2_journal_unfile_buffer() and __jbd2_journal_refile_buffer() drop transaction's jh reference when they remove jh from a transaction. This will be however inconvenient once we move state lock into journal_head itself as we still need to unlock it and we'd need to grab jh reference just for that. Move dropping of jh reference out of these functions into the few callers. Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20190809124233.13277-4-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-10-21jbd2: Simplify journal_unmap_buffer()Thomas Gleixner
journal_unmap_buffer() checks first whether the buffer head is a journal. If so it takes locks and then invokes jbd2_journal_grab_journal_head() followed by another check whether this is journal head buffer. The double checking is pointless. Replace the initial check with jbd2_journal_grab_journal_head() which alredy checks whether the buffer head is actually a journal. Allows also early access to the journal head pointer for the upcoming conversion of state lock to a regular spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jan Kara <jack@suse.cz> Cc: linux-ext4@vger.kernel.org Cc: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20190809124233.13277-2-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-10-09locking/lockdep: Remove unused @nested argument from lock_release()Qian Cai
Since the following commit: b4adfe8e05f1 ("locking/lockdep: Remove unused argument in __lock_release") @nested is no longer used in lock_release(), so remove it from all lock_release() calls and friends. Signed-off-by: Qian Cai <cai@lca.pw> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will@kernel.org> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: airlied@linux.ie Cc: akpm@linux-foundation.org Cc: alexander.levin@microsoft.com Cc: daniel@iogearbox.net Cc: davem@davemloft.net Cc: dri-devel@lists.freedesktop.org Cc: duyuyang@gmail.com Cc: gregkh@linuxfoundation.org Cc: hannes@cmpxchg.org Cc: intel-gfx@lists.freedesktop.org Cc: jack@suse.com Cc: jlbec@evilplan.or Cc: joonas.lahtinen@linux.intel.com Cc: joseph.qi@linux.alibaba.com Cc: jslaby@suse.com Cc: juri.lelli@redhat.com Cc: maarten.lankhorst@linux.intel.com Cc: mark@fasheh.com Cc: mhocko@kernel.org Cc: mripard@kernel.org Cc: ocfs2-devel@oss.oracle.com Cc: rodrigo.vivi@intel.com Cc: sean@poorly.run Cc: st@kernel.org Cc: tj@kernel.org Cc: tytso@mit.edu Cc: vdavydov.dev@gmail.com Cc: vincent.guittot@linaro.org Cc: viro@zeniv.linux.org.uk Link: https://lkml.kernel.org/r/1568909380-32199-1-git-send-email-cai@lca.pw Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-09-24jbd2: remove jbd2_journal_inode_add_[write|wait]Joseph Qi
Since ext4/ocfs2 are using jbd2_inode dirty range scoping APIs now, jbd2_journal_inode_add_[write|wait] are not used any more, remove them. Link: http://lkml.kernel.org/r/1562977611-8412-2-git-send-email-joseph.qi@linux.alibaba.com Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com> Reviewed-by: Ross Zwisler <zwisler@google.com> Acked-by: Changwei Ge <chge@linux.alibaba.com> Cc: Gang He <ghe@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Jun Piao <piaojun@huawei.com> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-08-24jbd2: add missing tracepoint for reserved handleXiaoguang Wang
This issue was found when I use ebpf to trace every jbd2 handle's running info in dioread_nolock case. Signed-off-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-08-11jbd2: flush_descriptor(): Do not decrease buffer head's ref countChandan Rajendra
When executing generic/388 on a ppc64le machine, we notice the following call trace, VFS: brelse: Trying to free free buffer WARNING: CPU: 0 PID: 6637 at /root/repos/linux/fs/buffer.c:1195 __brelse+0x84/0xc0 Call Trace: __brelse+0x80/0xc0 (unreliable) invalidate_bh_lru+0x78/0xc0 on_each_cpu_mask+0xa8/0x130 on_each_cpu_cond_mask+0x130/0x170 invalidate_bh_lrus+0x44/0x60 invalidate_bdev+0x38/0x70 ext4_put_super+0x294/0x560 generic_shutdown_super+0xb0/0x170 kill_block_super+0x38/0xb0 deactivate_locked_super+0xa4/0xf0 cleanup_mnt+0x164/0x1d0 task_work_run+0x110/0x160 do_notify_resume+0x414/0x460 ret_from_except_lite+0x70/0x74 The warning happens because flush_descriptor() drops bh reference it does not own. The bh reference acquired by jbd2_journal_get_descriptor_buffer() is owned by the log_bufs list and gets released when this list is processed. The reference for doing IO is only acquired in write_dirty_buffer() later in flush_descriptor(). Reported-by: Harish Sriram <harish@linux.ibm.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Chandan Rajendra <chandan@linux.ibm.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-06-20jbd2: drop declaration of journal_sync_buffer()Theodore Ts'o
The journal_sync_buffer() function was never carried over from jbd to jbd2. So get rid of the vestigal declaration of this (non-existent) function. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-06-20jbd2: introduce jbd2_inode dirty range scopingRoss Zwisler
Currently both journal_submit_inode_data_buffers() and journal_finish_inode_data_buffers() operate on the entire address space of each of the inodes associated with a given journal entry. The consequence of this is that if we have an inode where we are constantly appending dirty pages we can end up waiting for an indefinite amount of time in journal_finish_inode_data_buffers() while we wait for all the pages under writeback to be written out. The easiest way to cause this type of workload is do just dd from /dev/zero to a file until it fills the entire filesystem. This can cause journal_finish_inode_data_buffers() to wait for the duration of the entire dd operation. We can improve this situation by scoping each of the inode dirty ranges associated with a given transaction. We do this via the jbd2_inode structure so that the scoping is contained within jbd2 and so that it follows the lifetime and locking rules for that structure. This allows us to limit the writeback & wait in journal_submit_inode_data_buffers() and journal_finish_inode_data_buffers() respectively to the dirty range for a given struct jdb2_inode, keeping us from waiting forever if the inode in question is still being appended to. Signed-off-by: Ross Zwisler <zwisler@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz> Cc: stable@vger.kernel.org
2019-05-30jbd2: fix typo in comment of journal_submit_inode_data_buffersLiu Song
delayed/dealyed Signed-off-by: Liu Song <liu.song11@zte.com.cn> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>
2019-05-30jbd2: fix some print format mistakesGaowei Pu
There are some print format mistakes in debug messages. Fix them. Signed-off-by: Gaowei Pu <pugaowei@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-10jbd2: fix potential double freeChengguang Xu
When failing from creating cache jbd2_inode_cache, we will destroy the previously created cache jbd2_handle_cache twice. This patch fixes this by moving each cache initialization/destruction to its own separate, individual function. Signed-off-by: Chengguang Xu <cgxu519@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org
2019-04-06jbd2: check superblock mapped prior to committingJiufei Xue
We hit a BUG at fs/buffer.c:3057 if we detached the nbd device before unmounting ext4 filesystem. The typical chain of events leading to the BUG: jbd2_write_superblock submit_bh submit_bh_wbc BUG_ON(!buffer_mapped(bh)); The block device is removed and all the pages are invalidated. JBD2 was trying to write journal superblock to the block device which is no longer present. Fix this by checking the journal superblock's buffer head prior to submitting. Reported-by: Eric Ren <renzhen@linux.alibaba.com> Signed-off-by: Jiufei Xue <jiufei.xue@linux.alibaba.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz> Cc: stable@kernel.org
2019-04-06jbd2: remove repeated assignments in __jbd2_log_wait_for_space()Liu Song
At the beginning, nblocks has been assigned. There is no need to repeat the assignment in the while loop, and remove it. Signed-off-by: Liu Song <liu.song11@zte.com.cn> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>
2019-03-01jbd2: jbd2_get_transaction does not need to return a valueLiu Song
In jbd2_get_transaction, a new transaction is initialized, and set to the j_running_transaction. No need for a return value, so remove it. Also, adjust some comments to match the actual operation of this function. Signed-off-by: Liu Song <liu.song11@zte.com.cn> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>
2019-03-01jbd2: fix invalid descriptor block checksumluojiajun
In jbd2_journal_commit_transaction(), if we are in abort mode, we may flush the buffer without setting descriptor block checksum by goto start_journal_io. Then fs is mounted, jbd2_descriptor_block_csum_verify() failed. [ 271.379811] EXT4-fs (vdd): shut down requested (2) [ 271.381827] Aborting journal on device vdd-8. [ 271.597136] JBD2: Invalid checksum recovering block 22199 in log [ 271.598023] JBD2: recovery failed [ 271.598484] EXT4-fs (vdd): error loading journal Fix this problem by keep setting descriptor block checksum if the descriptor buffer is not NULL. This checksum problem can be reproduced by xfstests generic/388. Signed-off-by: luojiajun <luojiajun3@huawei.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>
2019-02-21jbd2: fix compile warning when using JBUFFER_TRACEzhangyi (F)
The jh pointer may be used uninitialized in the two cases below and the compiler complain about it when enabling JBUFFER_TRACE macro, fix them. In file included from fs/jbd2/transaction.c:19:0: fs/jbd2/transaction.c: In function ‘jbd2_journal_get_undo_access’: ./include/linux/jbd2.h:1637:38: warning: ‘jh’ is used uninitialized in this function [-Wuninitialized] #define JBUFFER_TRACE(jh, info) do { printk("%s: %d\n", __func__, jh->b_jcount);} while (0) ^ fs/jbd2/transaction.c:1219:23: note: ‘jh’ was declared here struct journal_head *jh; ^ In file included from fs/jbd2/transaction.c:19:0: fs/jbd2/transaction.c: In function ‘jbd2_journal_dirty_metadata’: ./include/linux/jbd2.h:1637:38: warning: ‘jh’ may be used uninitialized in this function [-Wmaybe-uninitialized] #define JBUFFER_TRACE(jh, info) do { printk("%s: %d\n", __func__, jh->b_jcount);} while (0) ^ fs/jbd2/transaction.c:1332:23: note: ‘jh’ was declared here struct journal_head *jh; ^ Signed-off-by: zhangyi (F) <yi.zhang@huawei.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org Reviewed-by: Jan Kara <jack@suse.cz>
2019-02-14jbd2: fold jbd2_superblock_csum_{verify,set} into their callersTheodore Ts'o
The functions jbd2_superblock_csum_verify() and jbd2_superblock_csum_set() only get called from one location, so to simplify things, fold them into their callers. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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