Clean up: Continue to rationalize the locking in nfs_get_client() by
moving the logic that handles the case where a matching server IP
address is not found.
When we support server trunking detection, client initialization may
return a different nfs_client struct than was passed to it. Change
the synopsis of the init_client methods to return an nfs_client.
The client initialization logic in nfs_get_client() is not much more
than a wrapper around ->init_client. It's simpler to keep the little
bits of error handling in the version-specific init_client methods.
No behavior change is expected.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
fs/nfs/client.c | 52 ++++++++++++++++++++---------------------------
fs/nfs/internal.h | 19 +++++++++--------
include/linux/nfs_xdr.h | 3 ++-
3 files changed, 34 insertions(+), 40 deletions(-)
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 09b3f55..d62f7e4 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -548,7 +548,6 @@ nfs_get_client(const struct nfs_client_initdata *cl_init,
int noresvport)
{
struct nfs_client *clp, *new = NULL;
- int error;
struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
dprintk("--> nfs_get_client(%s,v%u)\n",
@@ -565,8 +564,13 @@ nfs_get_client(const struct nfs_client_initdata *cl_init,
nfs_free_client(new);
return nfs_found_client(cl_init, clp);
}
- if (new)
- goto install_client;
+ if (new) {
+ list_add(&new->cl_share_link, &nn->nfs_client_list);
+ spin_unlock(&nn->nfs_client_lock);
+ return cl_init->rpc_ops->init_client(new,
+ timeparms, ip_addr,
+ authflavour, noresvport);
+ }
spin_unlock(&nn->nfs_client_lock);
@@ -576,21 +580,6 @@ nfs_get_client(const struct nfs_client_initdata *cl_init,
dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
cl_init->hostname ?: "", PTR_ERR(new));
return new;
-
- /* install a new client and return with it unready */
-install_client:
- clp = new;
- list_add(&clp->cl_share_link, &nn->nfs_client_list);
- spin_unlock(&nn->nfs_client_lock);
-
- error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
- authflavour, noresvport);
- if (error < 0) {
- nfs_put_client(clp);
- return ERR_PTR(error);
- }
- dprintk("--> nfs_get_client() = %p [new]\n", clp);
- return clp;
}
/*
@@ -818,7 +807,8 @@ static int nfs_init_server_rpcclient(struct nfs_server *server,
/*
* Initialise an NFS2 or NFS3 client
*/
-int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
+struct nfs_client *nfs_init_client(struct nfs_client *clp,
+ const struct rpc_timeout *timeparms,
const char *ip_addr, rpc_authflavor_t authflavour,
int noresvport)
{
@@ -827,7 +817,7 @@ int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
if (clp->cl_cons_state == NFS_CS_READY) {
/* the client is already initialised */
dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
- return 0;
+ return clp;
}
/*
@@ -839,12 +829,13 @@ int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
if (error < 0)
goto error;
nfs_mark_client_ready(clp, NFS_CS_READY);
- return 0;
+ return clp;
error:
nfs_mark_client_ready(clp, error);
+ nfs_put_client(clp);
dprintk("<-- nfs_init_client() = xerror %d\n", error);
- return error;
+ return ERR_PTR(error);
}
/*
@@ -1353,11 +1344,11 @@ static int nfs4_init_client_minor_version(struct nfs_client *clp)
/*
* Initialise an NFS4 client record
*/
-int nfs4_init_client(struct nfs_client *clp,
- const struct rpc_timeout *timeparms,
- const char *ip_addr,
- rpc_authflavor_t authflavour,
- int noresvport)
+struct nfs_client *nfs4_init_client(struct nfs_client *clp,
+ const struct rpc_timeout *timeparms,
+ const char *ip_addr,
+ rpc_authflavor_t authflavour,
+ int noresvport)
{
char buf[INET6_ADDRSTRLEN + 1];
int error;
@@ -1365,7 +1356,7 @@ int nfs4_init_client(struct nfs_client *clp,
if (clp->cl_cons_state == NFS_CS_READY) {
/* the client is initialised already */
dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
- return 0;
+ return clp;
}
/* Check NFS protocol revision and initialize RPC op vector */
@@ -1405,12 +1396,13 @@ int nfs4_init_client(struct nfs_client *clp,
if (!nfs4_has_session(clp))
nfs_mark_client_ready(clp, NFS_CS_READY);
- return 0;
+ return clp;
error:
nfs_mark_client_ready(clp, error);
+ nfs_put_client(clp);
dprintk("<-- nfs4_init_client() = xerror %d\n", error);
- return error;
+ return ERR_PTR(error);
}
/*
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index faf15eb..f1021c8 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -154,6 +154,16 @@ extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
extern struct nfs_client *
nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
struct nfs4_sessionid *);
+extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
+ const struct rpc_timeout *timeparms,
+ const char *ip_addr,
+ rpc_authflavor_t authflavour,
+ int noresvport);
+extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
+ const struct rpc_timeout *timeparms,
+ const char *ip_addr,
+ rpc_authflavor_t authflavour,
+ int noresvport);
extern struct nfs_server *nfs_create_server(
const struct nfs_parsed_mount_data *,
struct nfs_fh *);
@@ -241,10 +251,6 @@ extern int nfs4_init_ds_session(struct nfs_client *clp);
/* proc.c */
void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
-extern int nfs_init_client(struct nfs_client *clp,
- const struct rpc_timeout *timeparms,
- const char *ip_addr, rpc_authflavor_t authflavour,
- int noresvport);
/* dir.c */
extern int nfs_access_cache_shrinker(struct shrinker *shrink,
@@ -345,11 +351,6 @@ extern int nfs_migrate_page(struct address_space *,
/* nfs4proc.c */
extern void __nfs4_read_done_cb(struct nfs_read_data *);
extern void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data);
-extern int nfs4_init_client(struct nfs_client *clp,
- const struct rpc_timeout *timeparms,
- const char *ip_addr,
- rpc_authflavor_t authflavour,
- int noresvport);
extern void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data);
extern int _nfs4_call_sync(struct rpc_clnt *clnt,
struct nfs_server *server,
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index ece705d..7437931 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1284,7 +1284,8 @@ struct nfs_rpc_ops {
struct nfs_open_context *ctx,
int open_flags,
struct iattr *iattr);
- int (*init_client) (struct nfs_client *, const struct rpc_timeout *,
+ struct nfs_client *
+ (*init_client) (struct nfs_client *, const struct rpc_timeout *,
const char *, rpc_authflavor_t, int);
int (*secinfo)(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *);
};
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
