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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
commite5fd91f1ef340da553f7a79da9540c3db711c937 (patch)
treeb11842027dc6641da63f4bcc524f8678263304a3 /net/sunrpc/debugfs.c
parent2a9b0348e685a63d97486f6749622b61e9e3292f (diff)
Linux-libre 4.2-gnu
Diffstat (limited to 'net/sunrpc/debugfs.c')
-rw-r--r--net/sunrpc/debugfs.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/net/sunrpc/debugfs.c b/net/sunrpc/debugfs.c
index 82962f7e6..e7b4d9356 100644
--- a/net/sunrpc/debugfs.c
+++ b/net/sunrpc/debugfs.c
@@ -10,9 +10,12 @@
#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;
+unsigned int rpc_inject_disconnect;
+
struct rpc_clnt_iter {
struct rpc_clnt *clnt;
loff_t pos;
@@ -257,6 +260,8 @@ rpc_xprt_debugfs_register(struct rpc_xprt *xprt)
debugfs_remove_recursive(xprt->debugfs);
xprt->debugfs = NULL;
}
+
+ atomic_set(&xprt->inject_disconnect, rpc_inject_disconnect);
}
void
@@ -266,11 +271,79 @@ rpc_xprt_debugfs_unregister(struct rpc_xprt *xprt)
xprt->debugfs = NULL;
}
+static int
+fault_open(struct inode *inode, struct file *filp)
+{
+ filp->private_data = kmalloc(128, GFP_KERNEL);
+ if (!filp->private_data)
+ return -ENOMEM;
+ return 0;
+}
+
+static int
+fault_release(struct inode *inode, struct file *filp)
+{
+ kfree(filp->private_data);
+ return 0;
+}
+
+static ssize_t
+fault_disconnect_read(struct file *filp, char __user *user_buf,
+ size_t len, loff_t *offset)
+{
+ char *buffer = (char *)filp->private_data;
+ size_t size;
+
+ size = sprintf(buffer, "%u\n", rpc_inject_disconnect);
+ return simple_read_from_buffer(user_buf, len, offset, buffer, size);
+}
+
+static ssize_t
+fault_disconnect_write(struct file *filp, const char __user *user_buf,
+ size_t len, loff_t *offset)
+{
+ char buffer[16];
+
+ if (len >= sizeof(buffer))
+ len = sizeof(buffer) - 1;
+ if (copy_from_user(buffer, user_buf, len))
+ return -EFAULT;
+ buffer[len] = '\0';
+ if (kstrtouint(buffer, 10, &rpc_inject_disconnect))
+ return -EINVAL;
+ return len;
+}
+
+static const struct file_operations fault_disconnect_fops = {
+ .owner = THIS_MODULE,
+ .open = fault_open,
+ .read = fault_disconnect_read,
+ .write = fault_disconnect_write,
+ .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 | S_IRUSR, 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;
}
@@ -282,6 +355,10 @@ sunrpc_debugfs_init(void)
if (!topdir)
return;
+ rpc_fault_dir = inject_fault_dir(topdir);
+ if (!rpc_fault_dir)
+ goto out_remove;
+
rpc_clnt_dir = debugfs_create_dir("rpc_clnt", topdir);
if (!rpc_clnt_dir)
goto out_remove;
@@ -294,5 +371,6 @@ sunrpc_debugfs_init(void)
out_remove:
debugfs_remove_recursive(topdir);
topdir = NULL;
+ rpc_fault_dir = NULL;
rpc_clnt_dir = NULL;
}