From: Andy Adamson <andros@xxxxxxxxxx>
This patch provides basic data structures representing the nfs41
sessions and slots, plus helpers for keeping a reference count
on the session and freeing it.
Note that our server only support a headerpadsz of 0 and
it ignores backchannel attributes at the moment.
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
[nfsd41: remove headerpadsz from channel attributes]
[nfsd41: embed nfsd4_channel in nfsd4_session]
Signed-off-by: Andy Adamson <andros@xxxxxxxxxx>
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
[nfsd41: use bool inuse for slot state]
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 22 ++++++++++++++++++++++
include/linux/nfsd/state.h | 34 ++++++++++++++++++++++++++++++++++
2 files changed, 56 insertions(+), 0 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 070e9e5..f4b624b 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -382,6 +382,28 @@ static void release_openowner(struct nfs4_stateowner *sop)
nfs4_put_stateowner(sop);
}
+#if defined(CONFIG_NFSD_V4_1)
+static void
+release_session(struct nfsd4_session *ses)
+{
+ list_del(&ses->se_hash);
+ list_del(&ses->se_perclnt);
+ nfsd4_put_session(ses);
+}
+
+void
+free_session(struct kref *kref)
+{
+ struct nfsd4_session *ses;
+
+ ses = container_of(kref, struct nfsd4_session, se_ref);
+ kfree(ses->se_slots);
+ kfree(ses);
+}
+#else /* CONFIG_NFSD_V4_1 */
+static inline void release_session(struct nfsd4_session *ses) {}
+#endif /* CONFIG_NFSD_V4_1 */
+
static inline void
renew_client(struct nfs4_client *clp)
{
diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h
index a6e4a00..afae103 100644
--- a/include/linux/nfsd/state.h
+++ b/include/linux/nfsd/state.h
@@ -99,6 +99,40 @@ struct nfs4_callback {
struct rpc_clnt * cb_client;
};
+struct nfsd4_slot {
+ bool sl_inuse;
+ struct nfsd4_session *sl_session;
+ u32 sl_seqid;
+};
+
+struct nfsd4_session {
+ struct kref se_ref;
+ struct list_head se_hash; /* hash by sessionid */
+ struct list_head se_perclnt;
+ u32 se_flags;
+ struct nfs4_client *se_client; /* for expire_client */
+ struct nfs4_sessionid se_sessionid;
+ u32 se_fmaxreq_sz;
+ u32 se_fmaxresp_sz;
+ u32 se_fmaxresp_cached;
+ u32 se_fmaxops;
+ u32 se_fnumslots;
+ struct nfsd4_slot *se_slots; /* forward channel slots */
+};
+
+static inline void
+nfsd4_put_session(struct nfsd4_session *ses)
+{
+ extern void free_session(struct kref *kref);
+ kref_put(&ses->se_ref, free_session);
+}
+
+static inline void
+nfsd4_get_session(struct nfsd4_session *ses)
+{
+ kref_get(&ses->se_ref);
+}
+
#define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
/*
--
1.6.2.1
--
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