1 files changed, 65 insertions, 0 deletions

diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 613bcb8171a5..42f3820ee8f5 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -22,6 +22,7 @@
 #include <linux/seq_file.h>
 #include <linux/pagemap.h>
 #include <linux/init.h>
+#include <linux/inet.h>
 #include <linux/string.h>
 #include <linux/smp_lock.h>
 #include <linux/ctype.h>
@@ -35,6 +36,7 @@
 #include <linux/nfsd/cache.h>
 #include <linux/nfsd/xdr.h>
 #include <linux/nfsd/syscall.h>
+#include <linux/lockd/lockd.h>
 
 #include <asm/uaccess.h>
 #include <net/ipv6.h>
@@ -53,6 +55,8 @@ enum {
         NFSD_Getfs,
         NFSD_List,
         NFSD_Fh,
+        NFSD_FO_UnlockIP,
+        NFSD_FO_UnlockFS,
         NFSD_Threads,
         NFSD_Pool_Threads,
         NFSD_Versions,
@@ -89,6 +93,9 @@ static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
 #endif
 
+static ssize_t failover_unlock_ip(struct file *file, char *buf, size_t size);
+static ssize_t failover_unlock_fs(struct file *file, char *buf, size_t size);
+
 static ssize_t (*write_op[])(struct file *, char *, size_t) = {
         [NFSD_Svc] = write_svc,
         [NFSD_Add] = write_add,
@@ -98,6 +105,8 @@ static ssize_t (*write_op[])(struct file *, char *, size_t) = {
         [NFSD_Getfd] = write_getfd,
         [NFSD_Getfs] = write_getfs,
         [NFSD_Fh] = write_filehandle,
+        [NFSD_FO_UnlockIP] = failover_unlock_ip,
+        [NFSD_FO_UnlockFS] = failover_unlock_fs,
         [NFSD_Threads] = write_threads,
         [NFSD_Pool_Threads] = write_pool_threads,
         [NFSD_Versions] = write_versions,
@@ -298,6 +307,58 @@ static ssize_t write_getfd(struct file *file, char *buf, size_t size)
         return err;
 }
 
+static ssize_t failover_unlock_ip(struct file *file, char *buf, size_t size)
+{
+        __be32 server_ip;
+        char *fo_path, c;
+        int b1, b2, b3, b4;
+
+        /* sanity check */
+        if (size == 0)
+                return -EINVAL;
+
+        if (buf[size-1] != '\n')
+                return -EINVAL;
+
+        fo_path = buf;
+        if (qword_get(&buf, fo_path, size) < 0)
+                return -EINVAL;
+
+        /* get ipv4 address */
+        if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4)
+                return -EINVAL;
+        server_ip = htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4);
+
+        return nlmsvc_unlock_all_by_ip(server_ip);
+}
+
+static ssize_t failover_unlock_fs(struct file *file, char *buf, size_t size)
+{
+        struct nameidata nd;
+        char *fo_path;
+        int error;
+
+        /* sanity check */
+        if (size == 0)
+                return -EINVAL;
+
+        if (buf[size-1] != '\n')
+                return -EINVAL;
+
+        fo_path = buf;
+        if (qword_get(&buf, fo_path, size) < 0)
+                return -EINVAL;
+
+        error = path_lookup(fo_path, 0, &nd);
+        if (error)
+                return error;
+
+        error = nlmsvc_unlock_all_by_sb(nd.path.mnt->mnt_sb);
+
+        path_put(&nd.path);
+        return error;
+}
+
 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
 {
         /* request is:
@@ -700,6 +761,10 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
                 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
+                [NFSD_FO_UnlockIP] = {"unlock_ip",
+                                        &transaction_ops, S_IWUSR|S_IRUSR},
+                [NFSD_FO_UnlockFS] = {"unlock_filesystem",
+                                        &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},