The quilt patch titled
Subject: xfs: implement ->notify_failure() for XFS
has been removed from the -mm tree. Its filename was
xfs-implement-notify_failure-for-xfs.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx>
Subject: xfs: implement ->notify_failure() for XFS
Date: Fri, 3 Jun 2022 13:37:30 +0800
Introduce xfs_notify_failure.c to handle failure related works, such as
implement ->notify_failure(), register/unregister dax holder in xfs, and
so on.
If the rmap feature of XFS enabled, we can query it to find files and
metadata which are associated with the corrupt data. For now all we do is
kill processes with that file mapped into their address spaces, but future
patches could actually do something about corrupt metadata.
After that, the memory failure needs to notify the processes who are using
those files.
Link: https://lkml.kernel.org/r/20220603053738.1218681-7-ruansy.fnst@xxxxxxxxxxx
Signed-off-by: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.wiliams@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
Cc: Goldwyn Rodrigues <rgoldwyn@xxxxxxx>
Cc: Jane Chu <jane.chu@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Ritesh Harjani <riteshh@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/xfs/Makefile | 5
fs/xfs/xfs_buf.c | 11 +
fs/xfs/xfs_fsops.c | 3
fs/xfs/xfs_mount.h | 1
fs/xfs/xfs_notify_failure.c | 220 ++++++++++++++++++++++++++++++++++
fs/xfs/xfs_super.h | 1
6 files changed, 238 insertions(+), 3 deletions(-)
--- a/fs/xfs/Makefile~xfs-implement-notify_failure-for-xfs
+++ a/fs/xfs/Makefile
@@ -129,6 +129,11 @@ xfs-$(CONFIG_SYSCTL) += xfs_sysctl.o
xfs-$(CONFIG_COMPAT) += xfs_ioctl32.o
xfs-$(CONFIG_EXPORTFS_BLOCK_OPS) += xfs_pnfs.o
+# notify failure
+ifeq ($(CONFIG_MEMORY_FAILURE),y)
+xfs-$(CONFIG_FS_DAX) += xfs_notify_failure.o
+endif
+
# online scrub/repair
ifeq ($(CONFIG_XFS_ONLINE_SCRUB),y)
--- a/fs/xfs/xfs_buf.c~xfs-implement-notify_failure-for-xfs
+++ a/fs/xfs/xfs_buf.c
@@ -5,6 +5,7 @@
*/
#include "xfs.h"
#include <linux/backing-dev.h>
+#include <linux/dax.h>
#include "xfs_shared.h"
#include "xfs_format.h"
@@ -1911,7 +1912,7 @@ xfs_free_buftarg(
list_lru_destroy(&btp->bt_lru);
blkdev_issue_flush(btp->bt_bdev);
- fs_put_dax(btp->bt_daxdev, NULL);
+ fs_put_dax(btp->bt_daxdev, btp->bt_mount);
kmem_free(btp);
}
@@ -1958,14 +1959,18 @@ xfs_alloc_buftarg(
struct block_device *bdev)
{
xfs_buftarg_t *btp;
+ const struct dax_holder_operations *ops = NULL;
+#if defined(CONFIG_FS_DAX) && defined(CONFIG_MEMORY_FAILURE)
+ ops = &xfs_dax_holder_operations;
+#endif
btp = kmem_zalloc(sizeof(*btp), KM_NOFS);
btp->bt_mount = mp;
btp->bt_dev = bdev->bd_dev;
btp->bt_bdev = bdev;
- btp->bt_daxdev = fs_dax_get_by_bdev(bdev, &btp->bt_dax_part_off, NULL,
- NULL);
+ btp->bt_daxdev = fs_dax_get_by_bdev(bdev, &btp->bt_dax_part_off,
+ mp, ops);
/*
* Buffer IO error rate limiting. Limit it to no more than 10 messages
--- a/fs/xfs/xfs_fsops.c~xfs-implement-notify_failure-for-xfs
+++ a/fs/xfs/xfs_fsops.c
@@ -528,6 +528,9 @@ xfs_do_force_shutdown(
} else if (flags & SHUTDOWN_CORRUPT_INCORE) {
tag = XFS_PTAG_SHUTDOWN_CORRUPT;
why = "Corruption of in-memory data";
+ } else if (flags & SHUTDOWN_CORRUPT_ONDISK) {
+ tag = XFS_PTAG_SHUTDOWN_CORRUPT;
+ why = "Corruption of on-disk metadata";
} else {
tag = XFS_PTAG_SHUTDOWN_IOERROR;
why = "Metadata I/O Error";
--- a/fs/xfs/xfs_mount.h~xfs-implement-notify_failure-for-xfs
+++ a/fs/xfs/xfs_mount.h
@@ -454,6 +454,7 @@ void xfs_do_force_shutdown(struct xfs_mo
#define SHUTDOWN_LOG_IO_ERROR (1u << 1) /* write attempt to the log failed */
#define SHUTDOWN_FORCE_UMOUNT (1u << 2) /* shutdown from a forced unmount */
#define SHUTDOWN_CORRUPT_INCORE (1u << 3) /* corrupt in-memory structures */
+#define SHUTDOWN_CORRUPT_ONDISK (1u << 4) /* corrupt metadata on device */
#define XFS_SHUTDOWN_STRINGS \
{ SHUTDOWN_META_IO_ERROR, "metadata_io" }, \
--- /dev/null
+++ a/fs/xfs/xfs_notify_failure.c
@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2022 Fujitsu. All Rights Reserved.
+ */
+
+#include "xfs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_alloc.h"
+#include "xfs_bit.h"
+#include "xfs_btree.h"
+#include "xfs_inode.h"
+#include "xfs_icache.h"
+#include "xfs_rmap.h"
+#include "xfs_rmap_btree.h"
+#include "xfs_rtalloc.h"
+#include "xfs_trans.h"
+
+#include <linux/mm.h>
+#include <linux/dax.h>
+
+struct failure_info {
+ xfs_agblock_t startblock;
+ xfs_extlen_t blockcount;
+ int mf_flags;
+};
+
+static pgoff_t
+xfs_failure_pgoff(
+ struct xfs_mount *mp,
+ const struct xfs_rmap_irec *rec,
+ const struct failure_info *notify)
+{
+ loff_t pos = XFS_FSB_TO_B(mp, rec->rm_offset);
+
+ if (notify->startblock > rec->rm_startblock)
+ pos += XFS_FSB_TO_B(mp,
+ notify->startblock - rec->rm_startblock);
+ return pos >> PAGE_SHIFT;
+}
+
+static unsigned long
+xfs_failure_pgcnt(
+ struct xfs_mount *mp,
+ const struct xfs_rmap_irec *rec,
+ const struct failure_info *notify)
+{
+ xfs_agblock_t end_rec;
+ xfs_agblock_t end_notify;
+ xfs_agblock_t start_cross;
+ xfs_agblock_t end_cross;
+
+ start_cross = max(rec->rm_startblock, notify->startblock);
+
+ end_rec = rec->rm_startblock + rec->rm_blockcount;
+ end_notify = notify->startblock + notify->blockcount;
+ end_cross = min(end_rec, end_notify);
+
+ return XFS_FSB_TO_B(mp, end_cross - start_cross) >> PAGE_SHIFT;
+}
+
+static int
+xfs_dax_failure_fn(
+ struct xfs_btree_cur *cur,
+ const struct xfs_rmap_irec *rec,
+ void *data)
+{
+ struct xfs_mount *mp = cur->bc_mp;
+ struct xfs_inode *ip;
+ struct failure_info *notify = data;
+ int error = 0;
+
+ if (XFS_RMAP_NON_INODE_OWNER(rec->rm_owner) ||
+ (rec->rm_flags & (XFS_RMAP_ATTR_FORK | XFS_RMAP_BMBT_BLOCK))) {
+ xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_ONDISK);
+ return -EFSCORRUPTED;
+ }
+
+ /* Get files that incore, filter out others that are not in use. */
+ error = xfs_iget(mp, cur->bc_tp, rec->rm_owner, XFS_IGET_INCORE,
+ 0, &ip);
+ /* Continue the rmap query if the inode isn't incore */
+ if (error == -ENODATA)
+ return 0;
+ if (error)
+ return error;
+
+ error = mf_dax_kill_procs(VFS_I(ip)->i_mapping,
+ xfs_failure_pgoff(mp, rec, notify),
+ xfs_failure_pgcnt(mp, rec, notify),
+ notify->mf_flags);
+ xfs_irele(ip);
+ return error;
+}
+
+static int
+xfs_dax_notify_ddev_failure(
+ struct xfs_mount *mp,
+ xfs_daddr_t daddr,
+ xfs_daddr_t bblen,
+ int mf_flags)
+{
+ struct xfs_trans *tp = NULL;
+ struct xfs_btree_cur *cur = NULL;
+ struct xfs_buf *agf_bp = NULL;
+ int error = 0;
+ xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, daddr);
+ xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, fsbno);
+ xfs_fsblock_t end_fsbno = XFS_DADDR_TO_FSB(mp, daddr + bblen);
+ xfs_agnumber_t end_agno = XFS_FSB_TO_AGNO(mp, end_fsbno);
+
+ error = xfs_trans_alloc_empty(mp, &tp);
+ if (error)
+ return error;
+
+ for (; agno <= end_agno; agno++) {
+ struct xfs_rmap_irec ri_low = { };
+ struct xfs_rmap_irec ri_high;
+ struct failure_info notify;
+ struct xfs_agf *agf;
+ xfs_agblock_t agend;
+
+ error = xfs_alloc_read_agf(mp, tp, agno, 0, &agf_bp);
+ if (error)
+ break;
+
+ cur = xfs_rmapbt_init_cursor(mp, tp, agf_bp, agf_bp->b_pag);
+
+ /*
+ * Set the rmap range from ri_low to ri_high, which represents
+ * a [start, end] where we looking for the files or metadata.
+ */
+ memset(&ri_high, 0xFF, sizeof(ri_high));
+ ri_low.rm_startblock = XFS_FSB_TO_AGBNO(mp, fsbno);
+ if (agno == end_agno)
+ ri_high.rm_startblock = XFS_FSB_TO_AGBNO(mp, end_fsbno);
+
+ agf = agf_bp->b_addr;
+ agend = min(be32_to_cpu(agf->agf_length),
+ ri_high.rm_startblock);
+ notify.startblock = ri_low.rm_startblock;
+ notify.blockcount = agend - ri_low.rm_startblock;
+
+ error = xfs_rmap_query_range(cur, &ri_low, &ri_high,
+ xfs_dax_failure_fn, ¬ify);
+ xfs_btree_del_cursor(cur, error);
+ xfs_trans_brelse(tp, agf_bp);
+ if (error)
+ break;
+
+ fsbno = XFS_AGB_TO_FSB(mp, agno + 1, 0);
+ }
+
+ xfs_trans_cancel(tp);
+ return error;
+}
+
+static int
+xfs_dax_notify_failure(
+ struct dax_device *dax_dev,
+ u64 offset,
+ u64 len,
+ int mf_flags)
+{
+ struct xfs_mount *mp = dax_holder(dax_dev);
+ u64 ddev_start;
+ u64 ddev_end;
+
+ if (!(mp->m_sb.sb_flags & SB_BORN)) {
+ xfs_warn(mp, "filesystem is not ready for notify_failure()!");
+ return -EIO;
+ }
+
+ if (mp->m_rtdev_targp && mp->m_rtdev_targp->bt_daxdev == dax_dev) {
+ xfs_warn(mp,
+ "notify_failure() not supported on realtime device!");
+ return -EOPNOTSUPP;
+ }
+
+ if (mp->m_logdev_targp && mp->m_logdev_targp->bt_daxdev == dax_dev &&
+ mp->m_logdev_targp != mp->m_ddev_targp) {
+ xfs_err(mp, "ondisk log corrupt, shutting down fs!");
+ xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_ONDISK);
+ return -EFSCORRUPTED;
+ }
+
+ if (!xfs_has_rmapbt(mp)) {
+ xfs_warn(mp, "notify_failure() needs rmapbt enabled!");
+ return -EOPNOTSUPP;
+ }
+
+ ddev_start = mp->m_ddev_targp->bt_dax_part_off;
+ ddev_end = ddev_start + bdev_nr_bytes(mp->m_ddev_targp->bt_bdev) - 1;
+
+ /* Ignore the range out of filesystem area */
+ if (offset + len < ddev_start)
+ return -ENXIO;
+ if (offset > ddev_end)
+ return -ENXIO;
+
+ /* Calculate the real range when it touches the boundary */
+ if (offset > ddev_start)
+ offset -= ddev_start;
+ else {
+ len -= ddev_start - offset;
+ offset = 0;
+ }
+ if (offset + len > ddev_end)
+ len -= ddev_end - offset;
+
+ return xfs_dax_notify_ddev_failure(mp, BTOBB(offset), BTOBB(len),
+ mf_flags);
+}
+
+const struct dax_holder_operations xfs_dax_holder_operations = {
+ .notify_failure = xfs_dax_notify_failure,
+};
--- a/fs/xfs/xfs_super.h~xfs-implement-notify_failure-for-xfs
+++ a/fs/xfs/xfs_super.h
@@ -92,6 +92,7 @@ extern xfs_agnumber_t xfs_set_inode_allo
extern const struct export_operations xfs_export_operations;
extern const struct quotactl_ops xfs_quotactl_operations;
+extern const struct dax_holder_operations xfs_dax_holder_operations;
extern void xfs_reinit_percpu_counters(struct xfs_mount *mp);
_
Patches currently in -mm which might be from ruansy.fnst@xxxxxxxxxxx are
