Anchor an nfs4_slot_table in the nfs_client for use with NFSv4.0
transport blocking. It is initialized only for NFSv4.0 nfs_client's.
Introduce appropriate minor version ops to handle nfs_client
initialization and shutdown requirements that differ for each minor
version.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
fs/nfs/nfs4_fs.h | 6 +++
fs/nfs/nfs4client.c | 101 +++++++++++++++++++++++++++++++++------------
fs/nfs/nfs4proc.c | 6 +++
include/linux/nfs_fs_sb.h | 3 +
4 files changed, 89 insertions(+), 27 deletions(-)
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 8de9b93..af2d5bf 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -38,6 +38,8 @@ struct nfs4_minor_version_ops {
u32 minor_version;
unsigned init_caps;
+ int (*init_client)(struct nfs_client *);
+ void (*shutdown_client)(struct nfs_client *);
bool (*match_stateid)(const nfs4_stateid *,
const nfs4_stateid *);
int (*find_root_sec)(struct nfs_server *, struct nfs_fh *,
@@ -292,6 +294,10 @@ extern const u32 nfs4_pathconf_bitmap[3];
extern const u32 nfs4_fsinfo_bitmap[3];
extern const u32 nfs4_fs_locations_bitmap[3];
+void nfs40_shutdown_client(struct nfs_client *);
+void nfs41_shutdown_client(struct nfs_client *);
+int nfs40_init_client(struct nfs_client *);
+int nfs41_init_client(struct nfs_client *);
void nfs4_free_client(struct nfs_client *);
struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *);
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 90dce91..eedd686 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -41,7 +41,7 @@ static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
}
#ifdef CONFIG_NFS_V4_1
-static void nfs4_shutdown_session(struct nfs_client *clp)
+void nfs41_shutdown_client(struct nfs_client *clp)
{
if (nfs4_has_session(clp)) {
nfs4_destroy_session(clp->cl_session);
@@ -49,11 +49,15 @@ static void nfs4_shutdown_session(struct nfs_client *clp)
}
}
-#else /* CONFIG_NFS_V4_1 */
-static void nfs4_shutdown_session(struct nfs_client *clp)
+#endif /* CONFIG_NFS_V4_1 */
+
+void nfs40_shutdown_client(struct nfs_client *clp)
{
+ if (clp->cl_slot_tbl) {
+ nfs4_release_slot_table(clp->cl_slot_tbl);
+ kfree(clp->cl_slot_tbl);
+ }
}
-#endif /* CONFIG_NFS_V4_1 */
struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
{
@@ -97,7 +101,7 @@ static void nfs4_shutdown_client(struct nfs_client *clp)
{
if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
nfs4_kill_renewd(clp);
- nfs4_shutdown_session(clp);
+ clp->cl_mvops->shutdown_client(clp);
nfs4_destroy_callback(clp);
if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
nfs_idmap_delete(clp);
@@ -144,34 +148,77 @@ static int nfs4_init_callback(struct nfs_client *clp)
return 0;
}
+/**
+ * nfs40_init_client - nfs_client initialization tasks for NFSv4.0
+ * @clp - nfs_client to initialize
+ *
+ * Returns zero on success, or a negative errno if some error occurred.
+ */
+int nfs40_init_client(struct nfs_client *clp)
+{
+ struct nfs4_slot_table *tbl;
+ int ret;
+
+ tbl = kzalloc(sizeof(*tbl), GFP_NOFS);
+ if (tbl == NULL)
+ return -ENOMEM;
+
+ ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE,
+ "NFSv4.0 transport Slot table");
+ if (ret) {
+ kfree(tbl);
+ return ret;
+ }
+
+ clp->cl_slot_tbl = tbl;
+ return 0;
+}
+
+#if defined(CONFIG_NFS_V4_1)
+
+/**
+ * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+
+ * @clp - nfs_client to initialize
+ *
+ * Returns zero on success, or a negative errno if some error occurred.
+ */
+int nfs41_init_client(struct nfs_client *clp)
+{
+ struct nfs4_session *session = NULL;
+
+ /*
+ * Create the session and mark it expired.
+ * When a SEQUENCE operation encounters the expired session
+ * it will do session recovery to initialize it.
+ */
+ session = nfs4_alloc_session(clp);
+ if (!session)
+ return -ENOMEM;
+
+ clp->cl_session = session;
+
+ /*
+ * The create session reply races with the server back
+ * channel probe. Mark the client NFS_CS_SESSION_INITING
+ * so that the client back channel can find the
+ * nfs_client struct
+ */
+ nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING);
+ return 0;
+}
+
+#endif /* CONFIG_NFS_V4_1 */
+
/*
* Initialize the minor version specific parts of an NFS4 client record
*/
static int nfs4_init_client_minor_version(struct nfs_client *clp)
{
-#if defined(CONFIG_NFS_V4_1)
- if (clp->cl_mvops->minor_version) {
- struct nfs4_session *session = NULL;
- /*
- * Create the session and mark it expired.
- * When a SEQUENCE operation encounters the expired session
- * it will do session recovery to initialize it.
- */
- session = nfs4_alloc_session(clp);
- if (!session)
- return -ENOMEM;
-
- clp->cl_session = session;
- /*
- * The create session reply races with the server back
- * channel probe. Mark the client NFS_CS_SESSION_INITING
- * so that the client back channel can find the
- * nfs_client struct
- */
- nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING);
- }
-#endif /* CONFIG_NFS_V4_1 */
+ int ret;
+ ret = clp->cl_mvops->init_client(clp);
+ if (ret)
+ return ret;
return nfs4_init_callback(clp);
}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 0ba7e35..4352d51 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7417,6 +7417,8 @@ static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
| NFS_CAP_ATOMIC_OPEN
| NFS_CAP_CHANGE_ATTR
| NFS_CAP_POSIX_LOCK,
+ .init_client = nfs40_init_client,
+ .shutdown_client = nfs40_shutdown_client,
.match_stateid = nfs4_match_stateid,
.find_root_sec = nfs4_find_root_sec,
.free_lock_state = nfs4_release_lockowner,
@@ -7435,6 +7437,8 @@ static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
| NFS_CAP_POSIX_LOCK
| NFS_CAP_STATEID_NFSV41
| NFS_CAP_ATOMIC_OPEN_V1,
+ .init_client = nfs41_init_client,
+ .shutdown_client = nfs41_shutdown_client,
.match_stateid = nfs41_match_stateid,
.find_root_sec = nfs41_find_root_sec,
.free_lock_state = nfs41_free_lock_state,
@@ -7454,6 +7458,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
| NFS_CAP_POSIX_LOCK
| NFS_CAP_STATEID_NFSV41
| NFS_CAP_ATOMIC_OPEN_V1,
+ .init_client = nfs41_init_client,
+ .shutdown_client = nfs41_shutdown_client,
.match_stateid = nfs41_match_stateid,
.find_root_sec = nfs41_find_root_sec,
.free_lock_state = nfs41_free_lock_state,
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index d221243..fc83d3d 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -78,6 +78,9 @@ struct nfs_client {
u32 cl_cb_ident; /* v4.0 callback identifier */
const struct nfs4_minor_version_ops *cl_mvops;
+ /* NFSv4.0 transport blocking */
+ struct nfs4_slot_table *cl_slot_tbl;
+
/* The sequence id to use for the next CREATE_SESSION */
u32 cl_seqid;
/* The flags used for obtaining the clientid during EXCHANGE_ID */
--
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