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xfs: create global stats and stats_clear in sysfs

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Currently, xfs global stats are in procfs. This patch introduces
(replicates) the global stats in sysfs. Additionally a stats_clear file
is introduced in sysfs.

Signed-off-by: Bill O'Donnell <billodo@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Bill O'Donnell
2015-10-12 05:15:45 +11:00
committed by Dave Chinner
parent 1f93e4a96c
commit bb230c1247
6 changed files with 178 additions and 17 deletions
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15
fs/xfs/xfs_sysctl.c
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@@ -19,6 +19,7 @@
#include <linux/sysctl.h>
#include <linux/proc_fs.h>
#include "xfs_error.h"
#include "xfs_stats.h"
static struct ctl_table_header *xfs_table_header;
@@ -31,22 +32,12 @@ xfs_stats_clear_proc_handler(
size_t *lenp,
loff_t *ppos)
{
int c, ret, *valp = ctl->data;
__uint32_t vn_active;
int ret, *valp = ctl->data;
ret = proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
if (!ret && write && *valp) {
xfs_notice(NULL, "Clearing xfsstats");
for_each_possible_cpu(c) {
preempt_disable();
/* save vn_active, it's a universal truth! */
vn_active = per_cpu(xfsstats, c).vn_active;
memset(&per_cpu(xfsstats, c), 0,
sizeof(struct xfsstats));
per_cpu(xfsstats, c).vn_active = vn_active;
preempt_enable();
}
xfs_stats_clearall();
xfs_stats_clear = 0;
}