[PATCH 08/10] xfs: add configuration handles for specific errors

[Dave Chinner <david@xxxxxxxxxxxxx>]

From: Dave Chinner <dchinner@xxxxxxxxxx>

now most of the infrastructure is in place, we can start adding
support for configuring specific errors such as ENODEV, ENOSPC, EIO,
etc. Add these error configurations and configure them all to have
appropriate behaviours. That is, all will use the "fail never, fail
at unmount" default except for ENODEV, which is an unrecoverable
error so it will be configured as a "fail fast" error.

Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
---
 fs/xfs/xfs_mount.h |  3 +++
 fs/xfs/xfs_sysfs.c | 24 ++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index c86fe43..7d62450 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -50,6 +50,9 @@ enum {
 };
 enum {
        XFS_ERR_DEFAULT,
+       XFS_ERR_EIO,
+       XFS_ERR_ENOSPC,
+       XFS_ERR_ENODEV,
        XFS_ERR_ERRNO_MAX,
 };
 enum {
diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c
index 921b079..019e859 100644
--- a/fs/xfs/xfs_sysfs.c
+++ b/fs/xfs/xfs_sysfs.c
@@ -469,6 +469,21 @@ static const struct xfs_error_init 
xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
          .retry_timeout = 0,
          .fail_at_unmount = true,
        },
+       { .name = "EIO",
+         .fail_speed = XFS_ERR_FAIL_NEVER,
+         .max_retries = INT_MAX,
+         .retry_timeout = 0,
+         .fail_at_unmount = true,
+       },
+       { .name = "ENOSPC",
+         .fail_speed = XFS_ERR_FAIL_NEVER,
+         .max_retries = INT_MAX,
+         .retry_timeout = 0,
+         .fail_at_unmount = true,
+       },
+       { .name = "ENODEV",
+         .fail_speed = XFS_ERR_FAIL_FAST,
+       },
 };
 
 static int
@@ -568,6 +583,15 @@ xfs_error_get_cfg(
        struct xfs_error_cfg    *cfg;
 
        switch (error) {
+       case EIO:
+               cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
+               break;
+       case ENOSPC:
+               cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
+               break;
+       case ENODEV:
+               cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
+               break;
        default:
                cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];
                break;
-- 
2.1.4