Brian Foster e20c8a517f xfs: wait on new inodes during quotaoff dquot release ... The quotaoff operation has a race with inode allocation that results in a livelock. An inode allocation that occurs before the quota status flags are updated acquires the appropriate dquots for the inode via xfs_qm_vop_dqalloc(). It then inserts the XFS_INEW inode into the perag radix tree, sometime later attaches the dquots to the inode and finally clears the XFS_INEW flag. Quotaoff expects to release the dquots from all inodes in the filesystem via xfs_qm_dqrele_all_inodes(). This invokes the AG inode iterator, which skips inodes in the XFS_INEW state because they are not fully constructed. If the scan occurs after dquots have been attached to an inode, but before XFS_INEW is cleared, the newly allocated inode will continue to hold a reference to the applicable dquots. When quotaoff invokes xfs_qm_dqpurge_all(), the reference count of those dquot(s) remain elevated and the dqpurge scan spins indefinitely. To address this problem, update the xfs_qm_dqrele_all_inodes() scan to wait on inodes marked on the XFS_INEW state. We wait on the inodes explicitly rather than skip and retry to avoid continuous retry loops due to a parallel inode allocation workload. Since quotaoff updates the quota state flags and uses a synchronous transaction before the dqrele scan, and dquots are attached to inodes after radix tree insertion iff quota is enabled, one INEW waiting pass through the AG guarantees that the scan has processed all inodes that could possibly hold dquot references. Reported-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>		2017-04-28 08:11:08 -07:00
..
libxfs	xfs: simplify validation of the unwritten extent bit	2017-04-25 09:40:41 -07:00
Kconfig	xfs: implement iomap based buffered write path	2016-06-21 09:53:44 +10:00
kmem.c	xfs: remove kmem_zalloc_greedy	2017-03-07 20:10:50 -08:00
kmem.h	xfs: remove kmem_zalloc_greedy	2017-03-07 20:10:50 -08:00
Makefile	xfs: implement the GETFSMAP ioctl	2017-04-03 15:18:17 -07:00
mrlock.h
uuid.c
uuid.h
xfs_acl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-10-10 20:16:43 -07:00
xfs_acl.h	xfs: Change how listxattr generates synthetic attributes	2015-12-06 21:34:16 -05:00
xfs_aops.c	xfs: remove the ISUNWRITTEN macro	2017-04-03 15:18:16 -07:00
xfs_aops.h	xfs: use iomap_dio_rw	2016-11-30 14:37:15 +11:00
xfs_attr_inactive.c	xfs: make several functions static	2016-06-01 17:38:15 +10:00
xfs_attr_list.c	xfs: several xattr functions can be void	2016-12-05 12:32:14 +11:00
xfs_attr.h	xfs: several xattr functions can be void	2016-12-05 12:32:14 +11:00
xfs_bmap_item.c	xfs: better log intent item refcount checking	2017-04-25 09:40:42 -07:00
xfs_bmap_item.h	xfs: log bmap intent items	2016-10-04 11:05:44 -07:00
xfs_bmap_util.c	xfs: more do_div cleanups	2017-04-25 09:40:41 -07:00
xfs_bmap_util.h	xfs: remove unused full argument from bmap	2017-01-30 16:32:25 -08:00
xfs_buf_item.c	xfs: reset b_first_retry_time when clear the retry status of xfs_buf_t	2017-02-03 14:39:07 -08:00
xfs_buf_item.h
xfs_buf.c	xfs: fix up quotacheck buffer list error handling	2017-04-25 09:40:42 -07:00
xfs_buf.h	xfs: fix up quotacheck buffer list error handling	2017-04-25 09:40:42 -07:00
xfs_dir2_readdir.c	xfs: prevent multi-fsb dir readahead from reading random blocks	2017-04-25 09:40:40 -07:00
xfs_discard.c	xfs: Allow user to kill fstrim process	2017-04-27 10:45:34 -07:00
xfs_discard.h	xfs: don't block the log commit handler for discards	2017-02-09 11:36:40 -08:00
xfs_dquot_item.c	xfs: allocate log vector buffers outside CIL context lock	2016-07-22 09:52:35 +10:00
xfs_dquot_item.h
xfs_dquot.c	xfs: don't wrap ID in xfs_dq_get_next_id	2017-01-17 11:43:38 -08:00
xfs_dquot.h
xfs_error.c	Merge branch 'xfs-4.8-misc-fixes-3' into for-next	2016-07-20 11:51:08 +10:00
xfs_error.h	xfs: simulate per-AG reservations being critically low	2016-10-05 16:26:31 -07:00
xfs_export.c	xfs: abstract block export operations from nfsd layouts	2016-07-15 15:31:29 -04:00
xfs_export.h
xfs_extent_busy.c	xfs: fix len comparison in xfs_extent_busy_trim	2017-02-16 17:20:12 -08:00
xfs_extent_busy.h	xfs: improve handling of busy extents in the low-level allocator	2017-02-09 10:50:25 -08:00
xfs_extfree_item.c	xfs: better log intent item refcount checking	2017-04-25 09:40:42 -07:00
xfs_extfree_item.h	xfs: refactor redo intent item processing	2016-08-03 11:23:49 +10:00
xfs_file.c	fs: add i_blocksize()	2017-02-27 18:43:46 -08:00
xfs_filestream.c	Merge branch 'xfs-4.9-log-recovery-fixes' into for-next	2016-10-03 09:56:28 +11:00
xfs_filestream.h
xfs_fsmap.c	xfs: use NULL instead of 0 to initialize a pointer in xfs_getfsmap	2017-04-25 09:40:41 -07:00
xfs_fsmap.h	xfs: implement the GETFSMAP ioctl	2017-04-03 15:18:17 -07:00
xfs_fsops.c	xfs: remove boilerplate around xfs_btree_init_block	2017-01-30 16:32:24 -08:00
xfs_fsops.h	xfs: preallocate blocks for worst-case btree expansion	2016-10-05 16:26:27 -07:00
xfs_globals.c	xfs: garbage collect old cowextsz reservations	2016-10-05 16:26:28 -07:00
xfs_icache.c	xfs: update ag iterator to support wait on new inodes	2017-04-28 08:11:08 -07:00
xfs_icache.h	xfs: update ag iterator to support wait on new inodes	2017-04-28 08:11:08 -07:00
xfs_icreate_item.c	fs: xfs: xfs_icreate_item: constify xfs_item_ops structure	2016-11-28 14:57:42 +11:00
xfs_icreate_item.h
xfs_inode_item.c	xfs: remove xfs_trans_ail_delete_bulk	2017-04-25 09:40:42 -07:00
xfs_inode_item.h	xfs: remove timestamps from incore inode	2016-02-09 16:54:58 +11:00
xfs_inode.c	xfs: drop iolock from reclaim context to appease lockdep	2017-04-12 08:43:23 -07:00
xfs_inode.h	xfs: support ability to wait on new inodes	2017-04-28 08:11:08 -07:00
xfs_ioctl32.c	xfs: implement the GETFSMAP ioctl	2017-04-03 15:18:17 -07:00
xfs_ioctl32.h
xfs_ioctl.c	xfs: fix getfsmap userspace memory corruption while setting OF_LAST	2017-04-25 09:40:42 -07:00
xfs_ioctl.h	xfs: don't pass ioflags around in the ioctl path	2016-07-20 11:29:35 +10:00
xfs_iomap.c	xfs: actually report xattr extents via iomap	2017-04-06 16:00:39 -07:00
xfs_iomap.h	xfs: introduce xfs_aligned_fsb_count	2017-02-06 17:47:46 -08:00
xfs_iops.c	statx: Add a system call to make enhanced file info available	2017-03-02 20:51:15 -05:00
xfs_iops.h	xfs: Propagate dentry down to inode_change_ok()	2016-09-22 10:56:19 +02:00
xfs_itable.c	xfs: fix kernel memory exposure problems	2017-04-03 15:18:15 -07:00
xfs_itable.h
xfs_linux.h	xfs: remove custom do_div implementations	2017-04-12 08:42:51 -07:00
xfs_log_cil.c	xfs: don't block the log commit handler for discards	2017-02-09 11:36:40 -08:00
xfs_log_priv.h	xfs: don't block the log commit handler for discards	2017-02-09 11:36:40 -08:00
xfs_log_recover.c	Merge branch 'xfs-4.10-misc-fixes-3' into for-next	2016-12-07 17:42:30 +11:00
xfs_log.c	xfs: corruption needs to respect endianess too!	2017-04-25 09:40:42 -07:00
xfs_log.h	xfs: remove unused struct declarations	2017-01-30 16:32:25 -08:00
xfs_message.c	xfs: more info from kmem deadlocks and high-level error msgs	2015-10-12 16:04:45 +11:00
xfs_message.h
xfs_mount.c	xfs: publish UUID in struct super_block	2017-04-28 08:10:53 -07:00
xfs_mount.h	xfs: more do_div cleanups	2017-04-25 09:40:41 -07:00
xfs_mru_cache.c
xfs_mru_cache.h
xfs_ondisk.h	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_pnfs.c	xfs: remove i_iolock and use i_rwsem in the VFS inode instead	2016-11-30 14:33:25 +11:00
xfs_pnfs.h	xfs: remove i_iolock and use i_rwsem in the VFS inode instead	2016-11-30 14:33:25 +11:00
xfs_qm_bhv.c
xfs_qm_syscalls.c	xfs: wait on new inodes during quotaoff dquot release	2017-04-28 08:11:08 -07:00
xfs_qm.c	xfs: fix up quotacheck buffer list error handling	2017-04-25 09:40:42 -07:00
xfs_qm.h	xfs: Split default quota limits by quota type	2016-02-08 11:27:55 +11:00
xfs_quota.h
xfs_quotaops.c	xfs: wire up Q_XGETNEXTQUOTA / get_nextdqblk	2016-02-08 11:27:38 +11:00
xfs_refcount_item.c	xfs: better log intent item refcount checking	2017-04-25 09:40:42 -07:00
xfs_refcount_item.h	xfs: log refcount intent items	2016-10-03 09:11:21 -07:00
xfs_reflink.c	xfs: factor out a xfs_bmap_is_real_extent helper	2017-04-03 15:18:16 -07:00
xfs_reflink.h	xfs: only reclaim unwritten COW extents periodically	2017-03-07 16:45:58 -08:00
xfs_rmap_item.c	xfs: better log intent item refcount checking	2017-04-25 09:40:42 -07:00
xfs_rmap_item.h	xfs: convert RUI log formats to use variable length arrays	2016-09-19 10:24:27 +10:00
xfs_rtalloc.c	xfs: simplify xfs_rtallocate_extent	2017-02-17 16:52:52 -08:00
xfs_rtalloc.h	xfs: add a couple of queries to iterate free extents in the rtbitmap	2017-04-03 15:18:17 -07:00
xfs_stats.c	xfs: make xfs btree stats less huge	2016-12-05 14:38:58 +11:00
xfs_stats.h	xfs: make xfs btree stats less huge	2016-12-05 14:38:58 +11:00
xfs_super.c	xfs: use dedicated log worker wq to avoid deadlock with cil wq	2017-04-03 15:18:15 -07:00
xfs_super.h	xfs: don't block the log commit handler for discards	2017-02-09 11:36:40 -08:00
xfs_symlink.c	xfs: remove i_iolock and use i_rwsem in the VFS inode instead	2016-11-30 14:33:25 +11:00
xfs_symlink.h
xfs_sysctl.c	xfs: garbage collect old cowextsz reservations	2016-10-05 16:26:28 -07:00
xfs_sysctl.h	xfs: garbage collect old cowextsz reservations	2016-10-05 16:26:28 -07:00
xfs_sysfs.c	xfs: resurrect debug mode drop buffered writes mechanism	2017-02-16 17:19:15 -08:00
xfs_sysfs.h	xfs: configurable error behavior via sysfs	2016-05-18 10:58:51 +10:00
xfs_trace.c	xfs: implement the GETFSMAP ioctl	2017-04-03 15:18:17 -07:00
xfs_trace.h	xfs: don't use bool values in trace buffers	2017-04-25 09:40:42 -07:00
xfs_trans_ail.c	xfs: remove xfs_trans_ail_delete_bulk	2017-04-25 09:40:42 -07:00
xfs_trans_bmap.c	xfs: implement deferred bmbt map/unmap operations	2016-10-04 11:05:44 -07:00
xfs_trans_buf.c	xfs: remove XBF_STALE flag wrapper macros	2016-02-10 15:01:11 +11:00
xfs_trans_dquot.c	xfs: Split default quota limits by quota type	2016-02-08 11:27:55 +11:00
xfs_trans_extfree.c	xfs: set up per-AG free space reservations	2016-09-19 10:30:52 +10:00
xfs_trans_inode.c	fs: Replace current_fs_time() with current_time()	2016-09-27 21:06:22 -04:00
xfs_trans_priv.h	xfs: remove xfs_trans_ail_delete_bulk	2017-04-25 09:40:42 -07:00
xfs_trans_refcount.c	xfs: connect refcount adjust functions to upper layers	2016-10-03 09:11:22 -07:00
xfs_trans_rmap.c	xfs: add shared rmap map/unmap/convert log item types	2016-10-05 16:26:29 -07:00
xfs_trans.c	xfs: fold __xfs_trans_roll into xfs_trans_roll	2017-04-06 16:00:11 -07:00
xfs_trans.h	xfs: fold __xfs_trans_roll into xfs_trans_roll	2017-04-06 16:00:11 -07:00
xfs_xattr.c	xfs: several xattr functions can be void	2016-12-05 12:32:14 +11:00
xfs.h