Shiyang Ruan fa422b353d mm, pmem, xfs: Introduce MF_MEM_PRE_REMOVE for unbind ... Now, if we suddenly remove a PMEM device(by calling unbind) which contains FSDAX while programs are still accessing data in this device, e.g.: ``` $FSSTRESS_PROG -d $SCRATCH_MNT -n 99999 -p 4 & # $FSX_PROG -N 1000000 -o 8192 -l 500000 $SCRATCH_MNT/t001 & echo "pfn1.1" > /sys/bus/nd/drivers/nd_pmem/unbind ``` it could come into an unacceptable state: 1. device has gone but mount point still exists, and umount will fail with "target is busy" 2. programs will hang and cannot be killed 3. may crash with NULL pointer dereference To fix this, we introduce a MF_MEM_PRE_REMOVE flag to let it know that we are going to remove the whole device, and make sure all related processes could be notified so that they could end up gracefully. This patch is inspired by Dan's "mm, dax, pmem: Introduce dev_pagemap_failure()"[1]. With the help of dax_holder and ->notify_failure() mechanism, the pmem driver is able to ask filesystem on it to unmap all files in use, and notify processes who are using those files. Call trace: trigger unbind -> unbind_store() -> ... (skip) -> devres_release_all() -> kill_dax() -> dax_holder_notify_failure(dax_dev, 0, U64_MAX, MF_MEM_PRE_REMOVE) -> xfs_dax_notify_failure() `-> freeze_super() // freeze (kernel call) `-> do xfs rmap ` -> mf_dax_kill_procs() ` -> collect_procs_fsdax() // all associated processes ` -> unmap_and_kill() ` -> invalidate_inode_pages2_range() // drop file's cache `-> thaw_super() // thaw (both kernel & user call) Introduce MF_MEM_PRE_REMOVE to let filesystem know this is a remove event. Use the exclusive freeze/thaw[2] to lock the filesystem to prevent new dax mapping from being created. Do not shutdown filesystem directly if configuration is not supported, or if failure range includes metadata area. Make sure all files and processes(not only the current progress) are handled correctly. Also drop the cache of associated files before pmem is removed. [1]: https://lore.kernel.org/linux-mm/161604050314.1463742.14151665140035795571.stgit@dwillia2-desk3.amr.corp.intel.com/ [2]: https://lore.kernel.org/linux-xfs/169116275623.3187159.16862410128731457358.stg-ugh@frogsfrogsfrogs/ Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>		2023-12-07 14:34:26 +05:30
..
libxfs	xfs: force small EFIs for reaping btree extents	2023-12-06 18:45:19 -08:00
scrub	xfs: force small EFIs for reaping btree extents	2023-12-06 18:45:19 -08:00
Kconfig	xfs: fix again select in kconfig XFS_ONLINE_SCRUB_STATS	2023-11-13 09:11:41 +05:30
kmem.c
kmem.h
Makefile	xfs: implement block reservation accounting for btrees we're staging	2023-12-06 18:45:18 -08:00
mrlock.h
xfs_acl.c	xfs: convert to ctime accessor functions	2023-07-24 10:30:06 +02:00
xfs_acl.h	fs: port ->set_acl() to pass mnt_idmap	2023-01-19 09:24:27 +01:00
xfs_aops.c	New code for 6.6:	2023-08-30 12:34:12 -07:00
xfs_aops.h
xfs_attr_inactive.c	xfs: make inode unlinked bucket recovery work with quotacheck	2023-09-12 10:31:07 -07:00
xfs_attr_item.c	xfs: elide ->create_done calls for unlogged deferred work	2023-12-06 18:45:17 -08:00
xfs_attr_item.h	xfs: share xattr name and value buffers when logging xattr updates	2022-05-23 08:43:46 +10:00
xfs_attr_list.c	xfs: use XFS_IFORK_Q to determine the presence of an xattr fork	2022-07-09 15:17:21 -07:00
xfs_bio_io.c	fs/xfs: Use the enum req_op and blk_opf_t types	2022-07-14 12:14:33 -06:00
xfs_bmap_item.c	xfs: move ->iop_relog to struct xfs_defer_op_type	2023-12-06 18:45:17 -08:00
xfs_bmap_item.h
xfs_bmap_util.c	New code for 6.7:	2023-11-08 13:22:16 -08:00
xfs_bmap_util.h	xfs: xfs_bmap_punch_delalloc_range() should take a byte range	2022-11-29 09:09:17 +11:00
xfs_buf_item_recover.c	xfs: verify buffer contents when we skip log replay	2023-04-12 15:49:23 +10:00
xfs_buf_item.c	xfs: buffer pins need to hold a buffer reference	2023-06-05 04:05:27 +10:00
xfs_buf_item.h
xfs_buf.c	Many singleton patches against the MM code. The patch series which are	2023-11-02 19:38:47 -10:00
xfs_buf.h	Many singleton patches against the MM code. The patch series which are	2023-11-02 19:38:47 -10:00
xfs_dahash_test.c	xfs: test the ascii case-insensitive hash	2023-04-11 19:05:05 -07:00
xfs_dahash_test.h	xfs: test dir/attr hash when loading module	2023-03-19 09:55:49 -07:00
xfs_dir2_readdir.c	xfs: rearrange the logic and remove the broken comment for xfs_dir2_isxx	2022-10-04 16:39:58 +11:00
xfs_discard.c	xfs: abort fstrim if kernel is suspending	2023-10-04 09:25:04 +11:00
xfs_discard.h	xfs: move log discard work to xfs_discard.c	2023-10-04 09:24:02 +11:00
xfs_dquot_item_recover.c	xfs: dquot recovery does not validate the recovered dquot	2023-11-22 23:39:36 +05:30
xfs_dquot_item.c
xfs_dquot_item.h
xfs_dquot.c	xfs: clean up dqblk extraction	2023-11-22 23:39:27 +05:30
xfs_dquot.h	xfs: remove warning counters from struct xfs_dquot_res	2022-05-11 17:12:09 +10:00
xfs_drain.c	xfs: minimize overhead of drain wakeups by using jump labels	2023-04-11 18:59:59 -07:00
xfs_drain.h	xfs: minimize overhead of drain wakeups by using jump labels	2023-04-11 18:59:59 -07:00
xfs_error.c	xfs: make kobj_type structures constant	2023-02-10 08:59:48 -08:00
xfs_error.h	xfs: allow setting full range of panic tags	2023-02-09 18:36:17 -08:00
xfs_export.c	xfs: fix reloading entire unlinked bucket lists	2023-09-24 18:12:13 -07:00
xfs_export.h
xfs_extent_busy.c	xfs: process free extents to busy list in FIFO order	2023-10-11 12:35:21 -07:00
xfs_extent_busy.h	xfs: reduce AGF hold times during fstrim operations	2023-10-04 09:24:52 +11:00
xfs_extfree_item.c	xfs: automatic freeing of freshly allocated unwritten space	2023-12-06 18:45:18 -08:00
xfs_extfree_item.h	xfs: refactor all the EFI/EFD log item sizeof logic	2022-10-31 08:58:20 -07:00
xfs_file.c	xfs: allow read IO and FICLONE to run concurrently	2023-10-23 12:02:26 +05:30
xfs_filestream.c	xfs: fix double xfs_perag_rele() in xfs_filestream_pick_ag()	2023-06-05 14:48:15 +10:00
xfs_filestream.h	xfs: pass perag to filestreams tracing	2023-02-13 09:14:56 +11:00
xfs_fsmap.c	xfs: convert do_div calls to xfs_rtb_to_rtx helper calls	2023-10-17 16:25:55 -07:00
xfs_fsmap.h
xfs_fsops.c	Minor cleanups for 6.5:	2023-07-09 09:50:42 -07:00
xfs_fsops.h
xfs_globals.c	xfs: allow setting full range of panic tags	2023-02-09 18:36:17 -08:00
xfs_health.c
xfs_icache.c	xfs: dynamically allocate the xfs-inodegc shrinker	2023-10-04 10:32:26 -07:00
xfs_icache.h	xfs: use per-mount cpumask to track nonempty percpu inodegc lists	2023-09-11 08:39:03 -07:00
xfs_icreate_item.c	xfs: fix potential log item leak	2022-05-04 11:45:11 +10:00
xfs_icreate_item.h
xfs_inode_item_recover.c	xfs: recovery should not clear di_flushiter unconditionally	2023-11-13 09:11:41 +05:30
xfs_inode_item.c	New code for 6.7:	2023-11-08 13:22:16 -08:00
xfs_inode_item.h	xfs: fix AGF vs inode cluster buffer deadlock	2023-06-05 04:08:27 +10:00
xfs_inode.c	New code for 6.7:	2023-11-08 13:22:16 -08:00
xfs_inode.h	xfs: respect the stable writes flag on the RT device	2023-11-20 15:05:19 +01:00
xfs_ioctl32.c	fs: port i_{g,u}id_into_vfs{g,u}id() to mnt_idmap	2023-01-19 09:24:29 +01:00
xfs_ioctl32.h	arch: Remove Itanium (IA-64) architecture	2023-09-11 08:13:17 +00:00
xfs_ioctl.c	xfs: respect the stable writes flag on the RT device	2023-11-20 15:05:19 +01:00
xfs_ioctl.h	fs: port ->fileattr_set() to pass mnt_idmap	2023-01-19 09:24:27 +01:00
xfs_iomap.c	xfs: don't allocate into the data fork for an unshare request	2023-05-02 09:14:51 +10:00
xfs_iomap.h	xfs: use iomap_valid method to detect stale cached iomaps	2022-11-29 09:09:17 +11:00
xfs_iops.c	xfs: respect the stable writes flag on the RT device	2023-11-20 15:05:19 +01:00
xfs_iops.h	fs: port ->setattr() to pass mnt_idmap	2023-01-19 09:24:02 +01:00
xfs_itable.c	xfs: convert to new timestamp accessors	2023-10-18 14:08:29 +02:00
xfs_itable.h	fs: port i_{g,u}id_into_vfs{g,u}id() to mnt_idmap	2023-01-19 09:24:29 +01:00
xfs_iunlink_item.c	xfs: create traced helper to get extra perag references	2023-04-11 18:59:55 -07:00
xfs_iunlink_item.h	xfs: add in-memory iunlink log item	2022-07-14 11:47:42 +10:00
xfs_iwalk.c	xfs: create traced helper to get extra perag references	2023-04-11 18:59:55 -07:00
xfs_iwalk.h
xfs_linux.h	xfs: use shifting and masking when converting rt extents, if possible	2023-10-17 16:26:25 -07:00
xfs_log_cil.c	xfs: move log discard work to xfs_discard.c	2023-10-04 09:24:02 +11:00
xfs_log_priv.h	xfs: use xfs_defer_pending objects to recover intent items	2023-12-06 18:45:14 -08:00
xfs_log_recover.c	xfs: move ->iop_recover to xfs_defer_op_type	2023-12-06 18:45:15 -08:00
xfs_log.c	xfs: use xfs_defer_pending objects to recover intent items	2023-12-06 18:45:14 -08:00
xfs_log.h	xfs: move CIL ordering to the logvec chain	2022-07-07 18:56:08 +10:00
xfs_message.c	Merge branch 'guilt/xfs-unsigned-flags-5.18' into xfs-5.19-for-next	2022-04-21 16:45:03 +10:00
xfs_message.h	xfs: implement per-mount warnings for scrub and shrink usage	2022-05-27 10:31:34 +10:00
xfs_mount.c	xfs: dynamically allocate the xfs-inodegc shrinker	2023-10-04 10:32:26 -07:00
xfs_mount.h	New code for 6.7:	2023-11-08 13:22:16 -08:00
xfs_mru_cache.c
xfs_mru_cache.h
xfs_notify_failure.c	mm, pmem, xfs: Introduce MF_MEM_PRE_REMOVE for unbind	2023-12-07 14:34:26 +05:30
xfs_ondisk.h	xfs: use accessor functions for summary info words	2023-10-18 16:53:00 -07:00
xfs_pnfs.c	fs: port ->setattr() to pass mnt_idmap	2023-01-19 09:24:02 +01:00
xfs_pnfs.h
xfs_pwork.c
xfs_pwork.h
xfs_qm_bhv.c
xfs_qm_syscalls.c	xfs: introduce xfs_inodegc_push()	2022-06-23 13:34:38 -07:00
xfs_qm.c	xfs: dynamically allocate the xfs-qm shrinker	2023-10-04 10:32:26 -07:00
xfs_qm.h	xfs: dynamically allocate the xfs-qm shrinker	2023-10-04 10:32:26 -07:00
xfs_quota.h
xfs_quotaops.c	xfs: don't set quota warning values	2022-05-11 17:12:09 +10:00
xfs_refcount_item.c	xfs: move ->iop_relog to struct xfs_defer_op_type	2023-12-06 18:45:17 -08:00
xfs_refcount_item.h
xfs_reflink.c	xfs: remove __xfs_free_extent_later	2023-12-06 18:45:18 -08:00
xfs_reflink.h	xfs: pass perag to xfs_alloc_read_agf()	2022-07-07 19:07:40 +10:00
xfs_rmap_item.c	xfs: move ->iop_relog to struct xfs_defer_op_type	2023-12-06 18:45:17 -08:00
xfs_rmap_item.h
xfs_rtalloc.c	xfs: don't allow overly small or large realtime volumes	2023-12-06 18:45:17 -08:00
xfs_rtalloc.h	xfs: convert rt extent numbers to xfs_rtxnum_t	2023-10-17 16:24:22 -07:00
xfs_stats.c	xfs: replace unnecessary seq_printf with seq_puts	2022-09-19 06:48:14 +10:00
xfs_stats.h
xfs_super.c	New code for 6.7:	2023-11-08 13:22:16 -08:00
xfs_super.h	xfs: create scaffolding for creating debugfs entries	2023-08-10 07:48:07 -07:00
xfs_symlink.c	fs: port fs{g,u}id helpers to mnt_idmap	2023-01-19 09:24:30 +01:00
xfs_symlink.h	fs: port inode_init_owner() to mnt_idmap	2023-01-19 09:24:28 +01:00
xfs_sysctl.c	xfs: simplify two-level sysctl registration for xfs_table	2023-04-13 11:49:35 -07:00
xfs_sysctl.h	xfs: Add larp debug option	2022-05-11 17:01:22 +10:00
xfs_sysfs.c	xfs: document what LARP means	2023-12-06 18:45:17 -08:00
xfs_sysfs.h	xfs: make kobj_type structures constant	2023-02-10 08:59:48 -08:00
xfs_trace.c	xfs: add debug knob to slow down writeback for fun	2022-11-28 17:24:35 -08:00
xfs_trace.h	xfs: allow pausing of pending deferred work items	2023-12-06 18:45:18 -08:00
xfs_trans_ail.c	xfs: don't reverse order of items in bulk AIL insertion	2023-06-29 09:28:23 -07:00
xfs_trans_buf.c
xfs_trans_dquot.c	xfs: remove quota warning limit from struct xfs_quota_limits	2022-05-11 17:12:09 +10:00
xfs_trans_priv.h	xfs: convert log vector chain to use list heads	2022-07-07 18:55:59 +10:00
xfs_trans.c	xfs: use shifting and masking when converting rt extents, if possible	2023-10-17 16:26:25 -07:00
xfs_trans.h	xfs: move ->iop_relog to struct xfs_defer_op_type	2023-12-06 18:45:17 -08:00
xfs_xattr.c	vfs-6.7.xattr	2023-10-30 09:29:44 -10:00
xfs_xattr.h	xfs: move xfs_xattr_handlers to .rodata	2023-10-10 13:49:20 +02:00
xfs.h