[PATCH 7/7] smbfs: push down BKL into ioctl function

Arnd Bergmann
2010-04-27T14:26:02Z

Converting from ->ioctl to ->unlocked_ioctl with explicit
lock_kernel lets us kill the ioctl operation.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
fs/smbfs/dir.c | 2 +-
fs/smbfs/file.c | 2 +-
fs/smbfs/ioctl.c | 8 +++++---
fs/smbfs/proto.h | 2 +-
4 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/fs/smbfs/dir.c b/fs/smbfs/dir.c
index 3e4803b..6c97842 100644
--- a/fs/smbfs/dir.c
+++ b/fs/smbfs/dir.c
@@ -39,7 +39,7 @@ const struct file_operations smb_dir_operations =
{
.read = generic_read_dir,
.readdir = smb_readdir,
- .ioctl = smb_ioctl,
+ .unlocked_ioctl = smb_ioctl,
.open = smb_dir_open,
};

diff --git a/fs/smbfs/file.c b/fs/smbfs/file.c
index dbf6548..84ecf0e 100644
--- a/fs/smbfs/file.c
+++ b/fs/smbfs/file.c
@@ -437,7 +437,7 @@ const struct file_operations smb_file_operations =
.aio_read = smb_file_aio_read,
.write = do_sync_write,
.aio_write = smb_file_aio_write,
- .ioctl = smb_ioctl,
+ .unlocked_ioctl = smb_ioctl,
.mmap = smb_file_mmap,
.open = smb_file_open,
.release = smb_file_release,
diff --git a/fs/smbfs/ioctl.c b/fs/smbfs/ioctl.c
index 910215b..0721531 100644
--- a/fs/smbfs/ioctl.c
+++ b/fs/smbfs/ioctl.c
@@ -13,6 +13,7 @@
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/highuid.h>
+#include <linux/smp_lock.h>
#include <linux/net.h>

#include <linux/smb_fs.h>
@@ -22,14 +23,14 @@

#include "proto.h"

-int
-smb_ioctl(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+long
+smb_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct smb_sb_info *server = server_from_inode(filp->f_path.dentry->d_inode);
struct smb_conn_opt opt;
int result = -EINVAL;

+ lock_kernel();
switch (cmd) {
uid16_t uid16;
uid_t uid32;
@@ -62,6 +63,7 @@ smb_ioctl(struct inode *inode, struct file *filp,
default:
break;
}
+ unlock_kernel();

return result;
}
diff --git a/fs/smbfs/proto.h b/fs/smbfs/proto.h
index 03f456c..05939a6 100644
--- a/fs/smbfs/proto.h
+++ b/fs/smbfs/proto.h
@@ -67,7 +67,7 @@ extern const struct address_space_operations smb_file_aops;
extern const struct file_operations smb_file_operations;
extern const struct inode_operations smb_file_inode_operations;
/* ioctl.c */
-extern int smb_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg);
+extern long smb_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
/* smbiod.c */
extern void smbiod_wake_up(void);
extern int smbiod_register_server(struct smb_sb_info *server);
--
1.6.3.3