[PATCH] ncpfs: Use struct pid to track the userspace watchdog process

This patch converts the tracking of the user space watchdog process from using
a pid_t to use struct pid.  This makes us safe from pid wrap around issues and
prepares the way for the pid namespace.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Petr Vandrovec <VANDROVE@vc.cvut.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index 47462ac..861d950 100644 (file)
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -331,7 +331,7 @@ static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options)
        data->flags = 0;
        data->int_flags = 0;
        data->mounted_uid = 0;
-       data->wdog_pid = -1;
+       data->wdog_pid = NULL;
        data->ncp_fd = ~0;
        data->time_out = 10;
        data->retry_count = 20;
@@ -371,7 +371,7 @@ static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options)
                                data->flags = optint;
                                break;
                        case 'w':
-                               data->wdog_pid = optint;
+                               data->wdog_pid = find_get_pid(optint);
                                break;
                        case 'n':
                                data->ncp_fd = optint;
@@ -425,7 +425,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
                                data.flags = md->flags;
                                data.int_flags = NCP_IMOUNT_LOGGEDIN_POSSIBLE;
                                data.mounted_uid = md->mounted_uid;
-                               data.wdog_pid = md->wdog_pid;
+                               data.wdog_pid = find_get_pid(md->wdog_pid);
                                data.ncp_fd = md->ncp_fd;
                                data.time_out = md->time_out;
                                data.retry_count = md->retry_count;
@@ -445,7 +445,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
                                data.flags = md->flags;
                                data.int_flags = 0;
                                data.mounted_uid = md->mounted_uid;
-                               data.wdog_pid = md->wdog_pid;
+                               data.wdog_pid = find_get_pid(md->wdog_pid);
                                data.ncp_fd = md->ncp_fd;
                                data.time_out = md->time_out;
                                data.retry_count = md->retry_count;
@@ -711,7 +711,8 @@ static void ncp_put_super(struct super_block *sb)
        if (server->info_filp)
                fput(server->info_filp);
        fput(server->ncp_filp);
-       kill_proc(server->m.wdog_pid, SIGTERM, 1);
+       kill_pid(server->m.wdog_pid, SIGTERM, 1);
+       put_pid(server->m.wdog_pid);
 
        kfree(server->priv.data);
        kfree(server->auth.object_name);

diff --git a/include/linux/ncp_mount.h b/include/linux/ncp_mount.h
index f46bddc..a2b549e 100644 (file)
--- a/include/linux/ncp_mount.h
+++ b/include/linux/ncp_mount.h
@@ -75,7 +75,7 @@ struct ncp_mount_data_kernel {
        unsigned int     int_flags;     /* internal flags */
 #define NCP_IMOUNT_LOGGEDIN_POSSIBLE   0x0001
        __kernel_uid32_t mounted_uid;   /* Who may umount() this filesystem? */
-       __kernel_pid_t   wdog_pid;              /* Who cares for our watchdog packets? */
+       struct pid      *wdog_pid;      /* Who cares for our watchdog packets? */
        unsigned int     ncp_fd;        /* The socket to the ncp port */
        unsigned int     time_out;      /* How long should I wait after
                                           sending a NCP request? */