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Subject[v2] ceph: show max caps in debugfs caps file
Date
before
------
total 1286
avail 1005
used 281
reserved 0
min 1024

after
-----
total 1286
avail 1005
used 281
limit 261
reserved 0
min 1024

Signed-off-by: Yanhu Cao <gmayyyha@gmail.com>
Signed-off-by: Yanhu Cao <jrcaoyanhu@jd.com>
Reported-by: kbuild test robot <lkp@intel.com>
---
fs/ceph/caps.c | 6 ++++--
fs/ceph/debugfs.c | 8 +++++---
fs/ceph/mds_client.c | 1 +
fs/ceph/mds_client.h | 4 +++-
fs/ceph/super.h | 2 +-
5 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 5f3aa4d607de..17191d6cd3b5 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -404,8 +404,8 @@ void ceph_put_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap)
}

void ceph_reservation_status(struct ceph_fs_client *fsc,
- int *total, int *avail, int *used, int *reserved,
- int *min)
+ int *total, int *avail, int *used, int *limit,
+ int *reserved, int *min)
{
struct ceph_mds_client *mdsc = fsc->mdsc;

@@ -417,6 +417,8 @@ void ceph_reservation_status(struct ceph_fs_client *fsc,
*avail = mdsc->caps_avail_count;
if (used)
*used = mdsc->caps_use_count;
+ if (limit)
+ *limit = mdsc->caps_limit;
if (reserved)
*reserved = mdsc->caps_reserve_count;
if (min)
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index 481ac97b4d25..617020261902 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -138,16 +138,18 @@ static int caps_show(struct seq_file *s, void *p)
{
struct ceph_fs_client *fsc = s->private;
struct ceph_mds_client *mdsc = fsc->mdsc;
- int total, avail, used, reserved, min, i;
+ int total, avail, used, limit, reserved, min, i;
struct cap_wait *cw;

- ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
+ ceph_reservation_status(fsc, &total, &avail, &used,
+ &limit, &reserved, &min);
seq_printf(s, "total\t\t%d\n"
"avail\t\t%d\n"
"used\t\t%d\n"
+ "limit\t\t%d\n"
"reserved\t%d\n"
"min\t\t%d\n\n",
- total, avail, used, reserved, min);
+ total, avail, used, limit, reserved, min);
seq_printf(s, "ino issued implemented\n");
seq_printf(s, "-----------------------------------------------\n");

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 7c63abf5bea9..d26bc065f5f5 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1920,6 +1920,7 @@ int ceph_trim_caps(struct ceph_mds_client *mdsc,
int max_caps)
{
int trim_caps = session->s_nr_caps - max_caps;
+ mdsc->caps_limit = max_caps;

dout("trim_caps mds%d start: %d / %d, trim %d\n",
session->s_mds, session->s_nr_caps, max_caps, trim_caps);
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index 903d9edfd4bf..840d47976dbb 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -445,7 +445,9 @@ struct ceph_mds_client {
struct list_head cap_wait_list;
int caps_total_count; /* total caps allocated */
int caps_use_count; /* in use */
- int caps_use_max; /* max used caps */
+ int caps_use_max; /* max used caps,
+ limited by client */
+ int caps_limit; /* limited by mds */
int caps_reserve_count; /* unused, reserved */
int caps_avail_count; /* unused, unreserved */
int caps_min_count; /* keep at least this many
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 60aac3aee055..052d7725761d 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -700,7 +700,7 @@ extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
struct ceph_cap_reservation *ctx);
extern void ceph_reservation_status(struct ceph_fs_client *client,
int *total, int *avail, int *used,
- int *reserved, int *min);
+ int *limit, int *reserved, int *min);



--
2.24.3 (Apple Git-128)
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