From 93faca6ef45822b0825bb181859b1a8911e9c4c1 Mon Sep 17 00:00:00 2001 From: majianpeng Date: Wed, 26 Jun 2013 11:15:27 +0800 Subject: [PATCH] ceph: Reconstruct the func ceph_reserve_caps. Drop ignored return value. Fix allocation failure case to not leak. Signed-off-by: Jianpeng Ma Reviewed-by: Sage Weil --- fs/ceph/caps.c | 21 +++++++-------------- fs/ceph/super.h | 2 +- 2 files changed, 8 insertions(+), 15 deletions(-) diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 9a5ccc9e0d62..8ec27b130cc9 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -147,7 +147,7 @@ void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta) spin_unlock(&mdsc->caps_list_lock); } -int ceph_reserve_caps(struct ceph_mds_client *mdsc, +void ceph_reserve_caps(struct ceph_mds_client *mdsc, struct ceph_cap_reservation *ctx, int need) { int i; @@ -155,7 +155,6 @@ int ceph_reserve_caps(struct ceph_mds_client *mdsc, int have; int alloc = 0; LIST_HEAD(newcaps); - int ret = 0; dout("reserve caps ctx=%p need=%d\n", ctx, need); @@ -174,14 +173,15 @@ int ceph_reserve_caps(struct ceph_mds_client *mdsc, for (i = have; i < need; i++) { cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); - if (!cap) { - ret = -ENOMEM; - goto out_alloc_count; - } + if (!cap) + break; list_add(&cap->caps_item, &newcaps); alloc++; } - BUG_ON(have + alloc != need); + /* we didn't manage to reserve as much as we needed */ + if (have + alloc != need) + pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n", + ctx, need, have + alloc); spin_lock(&mdsc->caps_list_lock); mdsc->caps_total_count += alloc; @@ -197,13 +197,6 @@ int ceph_reserve_caps(struct ceph_mds_client *mdsc, 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_alloc_count: - /* we didn't manage to reserve as much as we needed */ - pr_warning("reserve caps ctx=%p ENOMEM need=%d got=%d\n", - ctx, need, have); - return ret; } int ceph_unreserve_caps(struct ceph_mds_client *mdsc, diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 7ccfdb4aea2e..dfbb729b3130 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -534,7 +534,7 @@ extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci); extern void ceph_caps_init(struct ceph_mds_client *mdsc); extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta); -extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, +extern void ceph_reserve_caps(struct ceph_mds_client *mdsc, struct ceph_cap_reservation *ctx, int need); extern int ceph_unreserve_caps(struct ceph_mds_client *mdsc, struct ceph_cap_reservation *ctx);