[PATCH 6/7] xfs: add configuration handlers for specific errors

[Carlos Maiolino <cmaiolino@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 be configured to retry forever by
default, except for ENODEV, which is an unrecoverable error, so it will be
configured to not retry on error

Changelog:

V3:
        - Do not implement .fail_speed and .fail_at_unmount
        - .fail_at_unmount will be implemented in a different patch

Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Signed-off-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
---
 fs/xfs/xfs_mount.h |  3 +++
 fs/xfs/xfs_sysfs.c | 20 ++++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 0382140..e3b3267 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -49,6 +49,9 @@ enum {
 };
 enum {
        XFS_ERR_DEFAULT,
+       XFS_ERR_EIO,
+       XFS_ERR_ENOSPC,
+       XFS_ERR_ENODEV,
        XFS_ERR_ERRNO_MAX,
 };
 
diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c
index c881360..1ed9033 100644
--- a/fs/xfs/xfs_sysfs.c
+++ b/fs/xfs/xfs_sysfs.c
@@ -481,6 +481,17 @@ static const struct xfs_error_init 
xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
          .max_retries = -1,
          .retry_timeout = 0,
        },
+       { .name = "EIO",
+         .max_retries = -1,
+         .retry_timeout = 0,
+       },
+       { .name = "ENOSPC",
+         .max_retries = -1,
+         .retry_timeout = 0,
+       },
+       { .name = "ENODEV",
+         .max_retries = -1,
+       },
 };
 
 static int
@@ -578,6 +589,15 @@ 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;
-- 
2.4.11