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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-01 09:45:47 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-01 09:45:47 -0700
commit1e848913f017cb84256ef5fe4cdd5cc4b935bd36 (patch)
tree8cd37e89c93d8288a568a67aeba0ef5d6a7b6ff7 /net
parent6c310bc1acdd02110182a2ec6efa3e7571a3b80c (diff)
parentf9c72d10d6fbf949558cd088389a42213ed7b12d (diff)
downloadlinux-1e848913f017cb84256ef5fe4cdd5cc4b935bd36.tar.bz2
Merge branch 'for-4.0' of git://linux-nfs.org/~bfields/linux
Pull nfsd fixes from Bruce Fields: "Two main issues: - We found that turning on pNFS by default (when it's configured at build time) was too aggressive, so we want to switch the default before the 4.0 release. - Recent client changes to increase open parallelism uncovered a serious bug lurking in the server's open code. Also fix a krb5/selinux regression. The rest is mainly smaller pNFS fixes" * 'for-4.0' of git://linux-nfs.org/~bfields/linux: sunrpc: make debugfs file creation failure non-fatal nfsd: require an explicit option to enable pNFS NFSD: Fix bad update of layout in nfsd4_return_file_layout NFSD: Take care the return value from nfsd4_encode_stateid NFSD: Printk blocklayout length and offset as format 0x%llx nfsd: return correct lockowner when there is a race on hash insert nfsd: return correct openowner when there is a race to put one in the hash NFSD: Put exports after nfsd4_layout_verify fail NFSD: Error out when register_shrinker() fail NFSD: Take care the return value from nfsd4_decode_stateid NFSD: Check layout type when returning client layouts NFSD: restore trace event lost in mismerge
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/clnt.c4
-rw-r--r--net/sunrpc/debugfs.c52
-rw-r--r--net/sunrpc/sunrpc_syms.c7
-rw-r--r--net/sunrpc/xprt.c7
4 files changed, 32 insertions, 38 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 612aa73bbc60..e6ce1517367f 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -303,9 +303,7 @@ static int rpc_client_register(struct rpc_clnt *clnt,
struct super_block *pipefs_sb;
int err;
- err = rpc_clnt_debugfs_register(clnt);
- if (err)
- return err;
+ rpc_clnt_debugfs_register(clnt);
pipefs_sb = rpc_get_sb_net(net);
if (pipefs_sb) {
diff --git a/net/sunrpc/debugfs.c b/net/sunrpc/debugfs.c
index e811f390f9f6..82962f7e6e88 100644
--- a/net/sunrpc/debugfs.c
+++ b/net/sunrpc/debugfs.c
@@ -129,48 +129,52 @@ static const struct file_operations tasks_fops = {
.release = tasks_release,
};
-int
+void
rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
{
- int len, err;
+ int len;
char name[24]; /* enough for "../../rpc_xprt/ + 8 hex digits + NULL */
+ struct rpc_xprt *xprt;
/* Already registered? */
- if (clnt->cl_debugfs)
- return 0;
+ if (clnt->cl_debugfs || !rpc_clnt_dir)
+ return;
len = snprintf(name, sizeof(name), "%x", clnt->cl_clid);
if (len >= sizeof(name))
- return -EINVAL;
+ return;
/* make the per-client dir */
clnt->cl_debugfs = debugfs_create_dir(name, rpc_clnt_dir);
if (!clnt->cl_debugfs)
- return -ENOMEM;
+ return;
/* make tasks file */
- err = -ENOMEM;
if (!debugfs_create_file("tasks", S_IFREG | S_IRUSR, clnt->cl_debugfs,
clnt, &tasks_fops))
goto out_err;
- err = -EINVAL;
rcu_read_lock();
+ xprt = rcu_dereference(clnt->cl_xprt);
+ /* no "debugfs" dentry? Don't bother with the symlink. */
+ if (!xprt->debugfs) {
+ rcu_read_unlock();
+ return;
+ }
len = snprintf(name, sizeof(name), "../../rpc_xprt/%s",
- rcu_dereference(clnt->cl_xprt)->debugfs->d_name.name);
+ xprt->debugfs->d_name.name);
rcu_read_unlock();
+
if (len >= sizeof(name))
goto out_err;
- err = -ENOMEM;
if (!debugfs_create_symlink("xprt", clnt->cl_debugfs, name))
goto out_err;
- return 0;
+ return;
out_err:
debugfs_remove_recursive(clnt->cl_debugfs);
clnt->cl_debugfs = NULL;
- return err;
}
void
@@ -226,33 +230,33 @@ static const struct file_operations xprt_info_fops = {
.release = xprt_info_release,
};
-int
+void
rpc_xprt_debugfs_register(struct rpc_xprt *xprt)
{
int len, id;
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);
if (len >= sizeof(name))
- return -EINVAL;
+ return;
/* make the per-client dir */
xprt->debugfs = debugfs_create_dir(name, rpc_xprt_dir);
if (!xprt->debugfs)
- return -ENOMEM;
+ return;
/* make tasks file */
if (!debugfs_create_file("info", S_IFREG | S_IRUSR, xprt->debugfs,
xprt, &xprt_info_fops)) {
debugfs_remove_recursive(xprt->debugfs);
xprt->debugfs = NULL;
- return -ENOMEM;
}
-
- return 0;
}
void
@@ -266,14 +270,17 @@ void __exit
sunrpc_debugfs_exit(void)
{
debugfs_remove_recursive(topdir);
+ topdir = NULL;
+ rpc_clnt_dir = NULL;
+ rpc_xprt_dir = NULL;
}
-int __init
+void __init
sunrpc_debugfs_init(void)
{
topdir = debugfs_create_dir("sunrpc", NULL);
if (!topdir)
- goto out;
+ return;
rpc_clnt_dir = debugfs_create_dir("rpc_clnt", topdir);
if (!rpc_clnt_dir)
@@ -283,10 +290,9 @@ sunrpc_debugfs_init(void)
if (!rpc_xprt_dir)
goto out_remove;
- return 0;
+ return;
out_remove:
debugfs_remove_recursive(topdir);
topdir = NULL;
-out:
- return -ENOMEM;
+ rpc_clnt_dir = NULL;
}
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index e37fbed87956..ee5d3d253102 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -98,10 +98,7 @@ init_sunrpc(void)
if (err)
goto out4;
- err = sunrpc_debugfs_init();
- if (err)
- goto out5;
-
+ sunrpc_debugfs_init();
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
rpc_register_sysctl();
#endif
@@ -109,8 +106,6 @@ init_sunrpc(void)
init_socket_xprt(); /* clnt sock transport */
return 0;
-out5:
- unregister_rpc_pipefs();
out4:
unregister_pernet_subsys(&sunrpc_net_ops);
out3:
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index e3015aede0d9..9949722d99ce 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -1331,7 +1331,6 @@ static void xprt_init(struct rpc_xprt *xprt, struct net *net)
*/
struct rpc_xprt *xprt_create_transport(struct xprt_create *args)
{
- int err;
struct rpc_xprt *xprt;
struct xprt_class *t;
@@ -1372,11 +1371,7 @@ found:
return ERR_PTR(-ENOMEM);
}
- err = rpc_xprt_debugfs_register(xprt);
- if (err) {
- xprt_destroy(xprt);
- return ERR_PTR(err);
- }
+ rpc_xprt_debugfs_register(xprt);
dprintk("RPC: created transport %p with %u slots\n", xprt,
xprt->max_reqs);