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authorCarlos Maiolino <cmaiolino@redhat.com>2016-05-18 10:58:51 +1000
committerDave Chinner <david@fromorbit.com>2016-05-18 10:58:51 +1000
commit192852be8b5fb14268c2133fe9ce5312e4745963 (patch)
treeb859e946965a129ee024aba4136fa5c79bc56cfe /fs/xfs/xfs_mount.h
parent9bdd9bd69b826875531bb1b2efb6aeb8d70e6f72 (diff)
downloadlinux-192852be8b5fb14268c2133fe9ce5312e4745963.tar.bz2
xfs: configurable error behavior via sysfs
We need to be able to change the way XFS behaviours in error conditions depending on the type of underlying storage. This is necessary for handling non-traditional block devices with extended error cases, such as thin provisioned devices that can return ENOSPC as an IO error. Introduce the basic sysfs infrastructure needed to define and configure error behaviours. This is done to be generic enough to extend to configuring behaviour in other error conditions, such as ENOMEM, which also has different desired behaviours according to machine configuration. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_mount.h')
-rw-r--r--fs/xfs/xfs_mount.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index bac6b3435591..d639795b0310 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -37,6 +37,24 @@ enum {
XFS_LOWSP_MAX,
};
+/*
+ * Error Configuration
+ *
+ * Error classes define the subsystem the configuration belongs to.
+ * Error numbers define the errors that are configurable.
+ */
+enum {
+ XFS_ERR_CLASS_MAX,
+};
+enum {
+ XFS_ERR_ERRNO_MAX,
+};
+
+struct xfs_error_cfg {
+ struct xfs_kobj kobj;
+ int max_retries;
+};
+
typedef struct xfs_mount {
struct super_block *m_super;
xfs_tid_t m_tid; /* next unused tid for fs */
@@ -127,6 +145,8 @@ typedef struct xfs_mount {
int64_t m_low_space[XFS_LOWSP_MAX];
/* low free space thresholds */
struct xfs_kobj m_kobj;
+ struct xfs_kobj m_error_kobj;
+ struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
struct xstats m_stats; /* per-fs stats */
struct workqueue_struct *m_buf_workqueue;