6.12-stable review patch. If anyone has any objections, please let me know.
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From: Darrick J. Wong djwong@kernel.org
commit f4ed93037966aea07ae6b10ab208976783d24e2e upstream.
If the filesystem has an external log device on pmem and the pmem reports a media error beyond the end of the log area, don't shut down the filesystem because we don't use that space.
Cc: stable@vger.kernel.org # v6.0 Fixes: 6f643c57d57c56 ("xfs: implement ->notify_failure() for XFS") Signed-off-by: "Darrick J. Wong" djwong@kernel.org Reviewed-by: Christoph Hellwig hch@lst.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/xfs/xfs_notify_failure.c | 121 +++++++++++++++++++++++++++++--------------- 1 file changed, 82 insertions(+), 39 deletions(-)
--- a/fs/xfs/xfs_notify_failure.c +++ b/fs/xfs/xfs_notify_failure.c @@ -154,6 +154,79 @@ xfs_dax_notify_failure_thaw( }
static int +xfs_dax_translate_range( + struct xfs_buftarg *btp, + u64 offset, + u64 len, + xfs_daddr_t *daddr, + uint64_t *bblen) +{ + u64 dev_start = btp->bt_dax_part_off; + u64 dev_len = bdev_nr_bytes(btp->bt_bdev); + u64 dev_end = dev_start + dev_len - 1; + + /* Notify failure on the whole device. */ + if (offset == 0 && len == U64_MAX) { + offset = dev_start; + len = dev_len; + } + + /* Ignore the range out of filesystem area */ + if (offset + len - 1 < dev_start) + return -ENXIO; + if (offset > dev_end) + return -ENXIO; + + /* Calculate the real range when it touches the boundary */ + if (offset > dev_start) + offset -= dev_start; + else { + len -= dev_start - offset; + offset = 0; + } + if (offset + len - 1 > dev_end) + len = dev_end - offset + 1; + + *daddr = BTOBB(offset); + *bblen = BTOBB(len); + return 0; +} + +static int +xfs_dax_notify_logdev_failure( + struct xfs_mount *mp, + u64 offset, + u64 len, + int mf_flags) +{ + xfs_daddr_t daddr; + uint64_t bblen; + int error; + + /* + * Return ENXIO instead of shutting down the filesystem if the failed + * region is beyond the end of the log. + */ + error = xfs_dax_translate_range(mp->m_logdev_targp, + offset, len, &daddr, &bblen); + if (error) + return error; + + /* + * In the pre-remove case the failure notification is attempting to + * trigger a force unmount. The expectation is that the device is + * still present, but its removal is in progress and can not be + * cancelled, proceed with accessing the log device. + */ + if (mf_flags & MF_MEM_PRE_REMOVE) + return 0; + + xfs_err(mp, "ondisk log corrupt, shutting down fs!"); + xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_ONDISK); + return -EFSCORRUPTED; +} + +static int xfs_dax_notify_ddev_failure( struct xfs_mount *mp, xfs_daddr_t daddr, @@ -263,8 +336,9 @@ xfs_dax_notify_failure( int mf_flags) { struct xfs_mount *mp = dax_holder(dax_dev); - u64 ddev_start; - u64 ddev_end; + xfs_daddr_t daddr; + uint64_t bblen; + int error;
if (!(mp->m_super->s_flags & SB_BORN)) { xfs_warn(mp, "filesystem is not ready for notify_failure()!"); @@ -279,17 +353,7 @@ xfs_dax_notify_failure(
if (mp->m_logdev_targp && mp->m_logdev_targp->bt_daxdev == dax_dev && mp->m_logdev_targp != mp->m_ddev_targp) { - /* - * In the pre-remove case the failure notification is attempting - * to trigger a force unmount. The expectation is that the - * device is still present, but its removal is in progress and - * can not be cancelled, proceed with accessing the log device. - */ - if (mf_flags & MF_MEM_PRE_REMOVE) - return 0; - xfs_err(mp, "ondisk log corrupt, shutting down fs!"); - xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_ONDISK); - return -EFSCORRUPTED; + return xfs_dax_notify_logdev_failure(mp, offset, len, mf_flags); }
if (!xfs_has_rmapbt(mp)) { @@ -297,33 +361,12 @@ xfs_dax_notify_failure( 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; - - /* Notify failure on the whole device. */ - if (offset == 0 && len == U64_MAX) { - offset = ddev_start; - len = bdev_nr_bytes(mp->m_ddev_targp->bt_bdev); - } - - /* Ignore the range out of filesystem area */ - if (offset + len - 1 < 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 - 1 > ddev_end) - len = ddev_end - offset + 1; + error = xfs_dax_translate_range(mp->m_ddev_targp, offset, len, &daddr, + &bblen); + if (error) + return error;
- return xfs_dax_notify_ddev_failure(mp, BTOBB(offset), BTOBB(len), - mf_flags); + return xfs_dax_notify_ddev_failure(mp, daddr, bblen, mf_flags); }
const struct dax_holder_operations xfs_dax_holder_operations = {