xfs: pass xfsstats structures to handlers and macros
This patch is the next step toward per-fs xfs stats. The patch makes
the show and clear routines able to handle any stats structure
associated with a kobject.
Instead of a single global xfsstats structure, add kobject and a pointer
to a per-cpu struct xfsstats. Modify the macros that manipulate the stats
accordingly: XFS_STATS_INC, XFS_STATS_DEC, and XFS_STATS_ADD now access
xfsstats->xs_stats.
The sysfs functions need to get from the kobject back to the xfsstats
structure which contains it, and pass the pointer to the ->xs_stats
percpu structure into the show & clear routines.
Signed-off-by: Bill O'Donnell <billodo@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 0dfc53b..e1a35a5 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -61,7 +61,6 @@
mempool_t *xfs_ioend_pool;
static struct kset *xfs_kset; /* top-level xfs sysfs dir */
-static struct xfs_kobj xfs_stats_kobj; /* global stats sysfs attrs */
#ifdef DEBUG
static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
#endif
@@ -1842,11 +1841,18 @@
goto out_sysctl_unregister;
}
- xfs_stats_kobj.kobject.kset = xfs_kset;
- error = xfs_sysfs_init(&xfs_stats_kobj, &xfs_stats_ktype, NULL,
+ xfsstats.xs_kobj.kobject.kset = xfs_kset;
+
+ xfsstats.xs_stats = alloc_percpu(struct xfsstats);
+ if (!xfsstats.xs_stats) {
+ error = -ENOMEM;
+ goto out_kset_unregister;
+ }
+
+ error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
"stats");
if (error)
- goto out_kset_unregister;
+ goto out_free_stats;
#ifdef DEBUG
xfs_dbg_kobj.kobject.kset = xfs_kset;
@@ -1871,7 +1877,9 @@
xfs_sysfs_del(&xfs_dbg_kobj);
out_remove_stats_kobj:
#endif
- xfs_sysfs_del(&xfs_stats_kobj);
+ xfs_sysfs_del(&xfsstats.xs_kobj);
+ out_free_stats:
+ free_percpu(xfsstats.xs_stats);
out_kset_unregister:
kset_unregister(xfs_kset);
out_sysctl_unregister:
@@ -1898,7 +1906,8 @@
#ifdef DEBUG
xfs_sysfs_del(&xfs_dbg_kobj);
#endif
- xfs_sysfs_del(&xfs_stats_kobj);
+ xfs_sysfs_del(&xfsstats.xs_kobj);
+ free_percpu(xfsstats.xs_stats);
kset_unregister(xfs_kset);
xfs_sysctl_unregister();
xfs_cleanup_procfs();