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authorBill O'Donnell <billodo@redhat.com>2015-10-12 05:19:45 +1100
committerDave Chinner <david@fromorbit.com>2015-10-12 05:19:45 +1100
commit80529c45ab66188a0b3814ba31409b31f5fcb53d (patch)
treef9de7af29683cb58b16856bea822c3b5c044dd68 /fs/xfs/xfs_stats.c
parenta27c264009cb236dc209875043a0c237af46a1af (diff)
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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>
Diffstat (limited to 'fs/xfs/xfs_stats.c')
-rw-r--r--fs/xfs/xfs_stats.c32
1 files changed, 15 insertions, 17 deletions
diff --git a/fs/xfs/xfs_stats.c b/fs/xfs/xfs_stats.c
index f481da09c388..3348b0b6177d 100644
--- a/fs/xfs/xfs_stats.c
+++ b/fs/xfs/xfs_stats.c
@@ -18,18 +18,18 @@
#include "xfs.h"
#include <linux/proc_fs.h>
-DEFINE_PER_CPU(struct xfsstats, xfsstats);
+struct xstats xfsstats;
-static int counter_val(int idx)
+static int counter_val(struct xfsstats __percpu *stats, int idx)
{
int val = 0, cpu;
for_each_possible_cpu(cpu)
- val += *(((__u32 *)&per_cpu(xfsstats, cpu) + idx));
+ val += *(((__u32 *)per_cpu_ptr(stats, cpu) + idx));
return val;
}
-int xfs_stats_format(char *buf)
+int xfs_stats_format(struct xfsstats __percpu *stats, char *buf)
{
int i, j;
int len = 0;
@@ -73,14 +73,14 @@ int xfs_stats_format(char *buf)
/* inner loop does each group */
for (; j < xstats[i].endpoint; j++)
len += snprintf(buf + len, PATH_MAX - len, " %u",
- counter_val(j));
+ counter_val(stats, j));
len += snprintf(buf + len, PATH_MAX - len, "\n");
}
/* extra precision counters */
for_each_possible_cpu(i) {
- xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
- xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
- xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;
+ xs_xstrat_bytes += per_cpu_ptr(stats, i)->xs_xstrat_bytes;
+ xs_write_bytes += per_cpu_ptr(stats, i)->xs_write_bytes;
+ xs_read_bytes += per_cpu_ptr(stats, i)->xs_read_bytes;
}
len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n",
@@ -95,7 +95,7 @@ int xfs_stats_format(char *buf)
return len;
}
-void xfs_stats_clearall(void)
+void xfs_stats_clearall(struct xfsstats __percpu *stats)
{
int c;
__uint32_t vn_active;
@@ -104,9 +104,9 @@ void xfs_stats_clearall(void)
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;
+ vn_active = per_cpu_ptr(stats, c)->vn_active;
+ memset(per_cpu_ptr(stats, c), 0, sizeof(*stats));
+ per_cpu_ptr(stats, c)->vn_active = vn_active;
preempt_enable();
}
}
@@ -117,10 +117,8 @@ static int xqm_proc_show(struct seq_file *m, void *v)
{
/* maximum; incore; ratio free to inuse; freelist */
seq_printf(m, "%d\t%d\t%d\t%u\n",
- 0,
- counter_val(XFSSTAT_END_XQMSTAT),
- 0,
- counter_val(XFSSTAT_END_XQMSTAT + 1));
+ 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT),
+ 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1));
return 0;
}
@@ -144,7 +142,7 @@ static int xqmstat_proc_show(struct seq_file *m, void *v)
seq_printf(m, "qm");
for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++)
- seq_printf(m, " %u", counter_val(j));
+ seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j));
seq_putc(m, '\n');
return 0;
}