Call new helper __ceph_unreserve_caps() to reduce duplicated code.
Signed-off-by: Chengguang Xu <cgxu519@xxxxxxx>
---
fs/ceph/caps.c | 40 +++++++++-------------------------------
1 file changed, 9 insertions(+), 31 deletions(-)
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 8129f6b39147..22eb70742c0b 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -198,6 +198,7 @@ int ceph_reserve_caps(struct ceph_mds_client *mdsc,
int have;
int alloc = 0;
int max_caps;
+ int err = 0;
bool trimmed = false;
struct ceph_mds_session *s;
LIST_HEAD(newcaps);
@@ -264,10 +265,12 @@ int ceph_reserve_caps(struct ceph_mds_client *mdsc,
pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n",
ctx, need, have + alloc);
+ err = -ENOMEM;
goto out_nomem;
}
BUG_ON(have + alloc != need);
+out_nomem:
spin_lock(&mdsc->caps_list_lock);
mdsc->caps_total_count += alloc;
mdsc->caps_reserve_count += alloc;
@@ -276,42 +279,17 @@ int ceph_reserve_caps(struct ceph_mds_client *mdsc,
BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count +
mdsc->caps_reserve_count +
mdsc->caps_avail_count);
+
+ if (err)
+ __ceph_unreserve_caps(mdsc, have + alloc);
+ else
+ ctx->count = need;
spin_unlock(&mdsc->caps_list_lock);
- ctx->count = need;
dout("reserve caps ctx=%p %d = %d used + %d resv + %d avail\n",
ctx, mdsc->caps_total_count, mdsc->caps_use_count,
mdsc->caps_reserve_count, mdsc->caps_avail_count);
- return 0;
-
-out_nomem:
-
- spin_lock(&mdsc->caps_list_lock);
- mdsc->caps_avail_count += have;
- mdsc->caps_reserve_count -= have;
-
- while (!list_empty(&newcaps)) {
- cap = list_first_entry(&newcaps,
- struct ceph_cap, caps_item);
- list_del(&cap->caps_item);
-
- /* Keep some preallocated caps around (ceph_min_count), to
- * avoid lots of free/alloc churn. */
- if (mdsc->caps_avail_count >=
- mdsc->caps_reserve_count + mdsc->caps_min_count) {
- kmem_cache_free(ceph_cap_cachep, cap);
- } else {
- mdsc->caps_avail_count++;
- mdsc->caps_total_count++;
- list_add(&cap->caps_item, &mdsc->caps_list);
- }
- }
-
- BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count +
- mdsc->caps_reserve_count +
- mdsc->caps_avail_count);
- spin_unlock(&mdsc->caps_list_lock);
- return -ENOMEM;
+ return err;
}
int ceph_unreserve_caps(struct ceph_mds_client *mdsc,
--
2.17.1
--
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