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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2016-06-20 13:37:19 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-23 12:02:36 -0400 |
| commit | 817e9f2c5c262b2716f5d77020d118ad53315f3e (patch) | |
| tree | 8f10a32438eb0ca880781ef4c1f1d5fd3d052597 /net | |
| parent | 067a7cd06f7bf860f2e3415394b065b9a0983802 (diff) | |
| download | linux-817e9f2c5c262b2716f5d77020d118ad53315f3e.tar.gz linux-817e9f2c5c262b2716f5d77020d118ad53315f3e.tar.bz2 linux-817e9f2c5c262b2716f5d77020d118ad53315f3e.zip | |
act_ife: acquire ife_mod_lock before reading ifeoplist
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sched/act_ife.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/net/sched/act_ife.c b/net/sched/act_ife.c index e4076598f214..ea4a2fef1b71 100644 --- a/net/sched/act_ife.c +++ b/net/sched/act_ife.c @@ -277,7 +277,7 @@ static int load_metaops_and_vet(struct tcf_ife_info *ife, u32 metaid, * under ife->tcf_lock for existing action */ static int add_metainfo(struct tcf_ife_info *ife, u32 metaid, void *metaval, - int len, bool exists) + int len, bool atomic) { struct tcf_meta_info *mi = NULL; struct tcf_meta_ops *ops = find_ife_oplist(metaid); @@ -286,7 +286,7 @@ static int add_metainfo(struct tcf_ife_info *ife, u32 metaid, void *metaval, if (!ops) return -ENOENT; - mi = kzalloc(sizeof(*mi), exists ? GFP_ATOMIC : GFP_KERNEL); + mi = kzalloc(sizeof(*mi), atomic ? GFP_ATOMIC : GFP_KERNEL); if (!mi) { /*put back what find_ife_oplist took */ module_put(ops->owner); @@ -296,7 +296,7 @@ static int add_metainfo(struct tcf_ife_info *ife, u32 metaid, void *metaval, mi->metaid = metaid; mi->ops = ops; if (len > 0) { - ret = ops->alloc(mi, metaval, exists ? GFP_ATOMIC : GFP_KERNEL); + ret = ops->alloc(mi, metaval, atomic ? GFP_ATOMIC : GFP_KERNEL); if (ret != 0) { kfree(mi); module_put(ops->owner); @@ -309,17 +309,19 @@ static int add_metainfo(struct tcf_ife_info *ife, u32 metaid, void *metaval, return ret; } -static int use_all_metadata(struct tcf_ife_info *ife, bool exists) +static int use_all_metadata(struct tcf_ife_info *ife) { struct tcf_meta_ops *o; int rc = 0; int installed = 0; + read_lock(&ife_mod_lock); list_for_each_entry(o, &ifeoplist, list) { - rc = add_metainfo(ife, o->metaid, NULL, 0, exists); + rc = add_metainfo(ife, o->metaid, NULL, 0, true); if (rc == 0) installed += 1; } + read_unlock(&ife_mod_lock); if (installed) return 0; @@ -523,7 +525,7 @@ metadata_parse_err: * as we can. You better have at least one else we are * going to bail out */ - err = use_all_metadata(ife, exists); + err = use_all_metadata(ife); if (err) { if (ret == ACT_P_CREATED) _tcf_ife_cleanup(a, bind); |