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| author | Trond Myklebust <trondmy@gmail.com> | 2018-10-01 10:41:49 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2018-10-29 16:58:04 -0400 |
| commit | 9d5afd9491c80779730686159aeec7fa06ead085 (patch) | |
| tree | 1362211f878bcf48d548c6ada586842e5d672395 /fs/nfsd | |
| parent | 6d1616b26cd91f2502111d098cd9c288dbafe5c8 (diff) | |
| download | blackbird-obmc-linux-9d5afd9491c80779730686159aeec7fa06ead085.tar.gz blackbird-obmc-linux-9d5afd9491c80779730686159aeec7fa06ead085.zip | |
knfsd: Lockless lookup of NFSv4 identities.
Enable RCU protected lookups of the NFSv4 idmap.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4idmap.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c index a5bb76593ce7..bf137fec33ff 100644 --- a/fs/nfsd/nfs4idmap.c +++ b/fs/nfsd/nfs4idmap.c @@ -65,6 +65,7 @@ struct ent { u32 id; char name[IDMAP_NAMESZ]; char authname[IDMAP_NAMESZ]; + struct rcu_head rcu_head; }; /* Common entry handling */ @@ -89,7 +90,7 @@ static void ent_put(struct kref *ref) { struct ent *map = container_of(ref, struct ent, h.ref); - kfree(map); + kfree_rcu(map, rcu_head); } static struct cache_head * @@ -264,8 +265,8 @@ out: static struct ent * idtoname_lookup(struct cache_detail *cd, struct ent *item) { - struct cache_head *ch = sunrpc_cache_lookup(cd, &item->h, - idtoname_hash(item)); + struct cache_head *ch = sunrpc_cache_lookup_rcu(cd, &item->h, + idtoname_hash(item)); if (ch) return container_of(ch, struct ent, h); else @@ -422,8 +423,8 @@ out: static struct ent * nametoid_lookup(struct cache_detail *cd, struct ent *item) { - struct cache_head *ch = sunrpc_cache_lookup(cd, &item->h, - nametoid_hash(item)); + struct cache_head *ch = sunrpc_cache_lookup_rcu(cd, &item->h, + nametoid_hash(item)); if (ch) return container_of(ch, struct ent, h); else |
