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xfs: introduce metadata IO error class 

Now we have the basic infrastructure, add the first error class so
we can build up the infrastructure in a meaningful way. Add the
metadata async write IO error class and sysfs entry, and introduce a
default configuration that matches the existing "retry forever"
behavior for async write metadata buffers.

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>
This commit is contained in:
Carlos Maiolino 2016-05-18 11:01:00 +10:00 committed by Dave Chinner
parent 192852be8b
commit ffd40ef697
2 changed files with 37 additions and 0 deletions
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3
fs/xfs/xfs_mount.h
View File

@ -44,9 +44,11 @@ enum {
* Error numbers define the errors that are configurable.
*/
enum {
XFS_ERR_METADATA,
XFS_ERR_CLASS_MAX,
};
enum {
XFS_ERR_DEFAULT,
XFS_ERR_ERRNO_MAX,
};
@ -146,6 +148,7 @@ typedef struct xfs_mount {
/* low free space thresholds */
struct xfs_kobj m_kobj;
struct xfs_kobj m_error_kobj;
struct xfs_kobj m_error_meta_kobj;
struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
struct xstats m_stats; /* per-fs stats */

34
fs/xfs/xfs_sysfs.c
View File

@ -399,11 +399,34 @@ int
xfs_error_sysfs_init(
struct xfs_mount *mp)
{
struct xfs_error_cfg *cfg;
int error;
/* .../xfs/<dev>/error/ */
error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
&mp->m_kobj, "error");
if (error)
return error;
/* .../xfs/<dev>/error/metadata/ */
error = xfs_sysfs_init(&mp->m_error_meta_kobj, &xfs_error_ktype,
&mp->m_error_kobj, "metadata");
if (error)
goto out_error;
cfg = &mp->m_error_cfg[XFS_ERR_METADATA][XFS_ERR_DEFAULT];
error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
&mp->m_error_meta_kobj, "default");
if (error)
goto out_error_meta;
cfg->max_retries = -1;
return 0;
out_error_meta:
xfs_sysfs_del(&mp->m_error_meta_kobj);
out_error:
xfs_sysfs_del(&mp->m_error_kobj);
return error;
}
@ -411,5 +434,16 @@ void
xfs_error_sysfs_del(
struct xfs_mount *mp)
{
struct xfs_error_cfg *cfg;
int i, j;
for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
cfg = &mp->m_error_cfg[i][j];
xfs_sysfs_del(&cfg->kobj);
}
}
xfs_sysfs_del(&mp->m_error_meta_kobj);
xfs_sysfs_del(&mp->m_error_kobj);
}