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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-06-12 17:56:22 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-07-03 17:57:18 +0300
commit0a0762c6c604bb0ce8afe4ee052514e0208152a0 (patch)
treec9519deb67339a031953daa0e6bd1c919ffe92b9 /net/sunrpc/debugfs.c
parent702d6a834b497a7c387722bd796e0dc18bb55360 (diff)
downloadlinux-0a0762c6c604bb0ce8afe4ee052514e0208152a0.tar.xz
sunrpc: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Jeff Layton <jlayton@kernel.org> Cc: Trond Myklebust <trond.myklebust@hammerspace.com> Cc: Anna Schumaker <anna.schumaker@netapp.com> Cc: linux-nfs@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20190612145622.GA18839@kroah.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/sunrpc/debugfs.c')
-rw-r--r--net/sunrpc/debugfs.c66
1 files changed, 11 insertions, 55 deletions
diff --git a/net/sunrpc/debugfs.c b/net/sunrpc/debugfs.c
index 95ebd76b132d..707d7aab1546 100644
--- a/net/sunrpc/debugfs.c
+++ b/net/sunrpc/debugfs.c
@@ -11,7 +11,6 @@
#include "netns.h"
static struct dentry *topdir;
-static struct dentry *rpc_fault_dir;
static struct dentry *rpc_clnt_dir;
static struct dentry *rpc_xprt_dir;
@@ -125,23 +124,16 @@ rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
char name[24]; /* enough for "../../rpc_xprt/ + 8 hex digits + NULL */
struct rpc_xprt *xprt;
- /* Already registered? */
- if (clnt->cl_debugfs || !rpc_clnt_dir)
- return;
-
len = snprintf(name, sizeof(name), "%x", clnt->cl_clid);
if (len >= sizeof(name))
return;
/* make the per-client dir */
clnt->cl_debugfs = debugfs_create_dir(name, rpc_clnt_dir);
- if (!clnt->cl_debugfs)
- return;
/* make tasks file */
- if (!debugfs_create_file("tasks", S_IFREG | 0400, clnt->cl_debugfs,
- clnt, &tasks_fops))
- goto out_err;
+ debugfs_create_file("tasks", S_IFREG | 0400, clnt->cl_debugfs, clnt,
+ &tasks_fops);
rcu_read_lock();
xprt = rcu_dereference(clnt->cl_xprt);
@@ -157,8 +149,7 @@ rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
if (len >= sizeof(name))
goto out_err;
- if (!debugfs_create_symlink("xprt", clnt->cl_debugfs, name))
- goto out_err;
+ debugfs_create_symlink("xprt", clnt->cl_debugfs, name);
return;
out_err:
@@ -226,9 +217,6 @@ rpc_xprt_debugfs_register(struct rpc_xprt *xprt)
static atomic_t cur_id;
char name[9]; /* 8 hex digits + NULL term */
- if (!rpc_xprt_dir)
- return;
-
id = (unsigned int)atomic_inc_return(&cur_id);
len = snprintf(name, sizeof(name), "%x", id);
@@ -237,15 +225,10 @@ rpc_xprt_debugfs_register(struct rpc_xprt *xprt)
/* make the per-client dir */
xprt->debugfs = debugfs_create_dir(name, rpc_xprt_dir);
- if (!xprt->debugfs)
- return;
/* make tasks file */
- if (!debugfs_create_file("info", S_IFREG | 0400, xprt->debugfs,
- xprt, &xprt_info_fops)) {
- debugfs_remove_recursive(xprt->debugfs);
- xprt->debugfs = NULL;
- }
+ debugfs_create_file("info", S_IFREG | 0400, xprt->debugfs, xprt,
+ &xprt_info_fops);
atomic_set(&xprt->inject_disconnect, rpc_inject_disconnect);
}
@@ -308,28 +291,11 @@ static const struct file_operations fault_disconnect_fops = {
.release = fault_release,
};
-static struct dentry *
-inject_fault_dir(struct dentry *topdir)
-{
- struct dentry *faultdir;
-
- faultdir = debugfs_create_dir("inject_fault", topdir);
- if (!faultdir)
- return NULL;
-
- if (!debugfs_create_file("disconnect", S_IFREG | 0400, faultdir,
- NULL, &fault_disconnect_fops))
- return NULL;
-
- return faultdir;
-}
-
void __exit
sunrpc_debugfs_exit(void)
{
debugfs_remove_recursive(topdir);
topdir = NULL;
- rpc_fault_dir = NULL;
rpc_clnt_dir = NULL;
rpc_xprt_dir = NULL;
}
@@ -337,26 +303,16 @@ sunrpc_debugfs_exit(void)
void __init
sunrpc_debugfs_init(void)
{
- topdir = debugfs_create_dir("sunrpc", NULL);
- if (!topdir)
- return;
+ struct dentry *rpc_fault_dir;
- rpc_fault_dir = inject_fault_dir(topdir);
- if (!rpc_fault_dir)
- goto out_remove;
+ topdir = debugfs_create_dir("sunrpc", NULL);
rpc_clnt_dir = debugfs_create_dir("rpc_clnt", topdir);
- if (!rpc_clnt_dir)
- goto out_remove;
rpc_xprt_dir = debugfs_create_dir("rpc_xprt", topdir);
- if (!rpc_xprt_dir)
- goto out_remove;
- return;
-out_remove:
- debugfs_remove_recursive(topdir);
- topdir = NULL;
- rpc_fault_dir = NULL;
- rpc_clnt_dir = NULL;
+ rpc_fault_dir = debugfs_create_dir("inject_fault", topdir);
+
+ debugfs_create_file("disconnect", S_IFREG | 0400, rpc_fault_dir, NULL,
+ &fault_disconnect_fops);
}