udf: BKL ioctl pushdown

Convert udf_ioctl to an unlocked_ioctl and push the BKL down into it.

Signed-off-by: John Kacur <jkacur@redhat.com
Signed-off-by: Jan Kara <jack@suse.cz>

3 files changed, 29 insertions, 19 deletions

diff --git a/fs/udf/dir.c b/fs/udf/dir.c
index f0f2a436251..3a84455c2a7 100644
--- a/fs/udf/dir.c
+++ b/fs/udf/dir.c
@@ -209,6 +209,6 @@ static int udf_readdir(struct file *filp, void *dirent, filldir_t filldir)
 const struct file_operations udf_dir_operations = {
         .read                   = generic_read_dir,
         .readdir                = udf_readdir,
-        .ioctl                  = udf_ioctl,
+        .unlocked_ioctl         = udf_ioctl,
         .fsync                  = simple_fsync,
 };
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 4b6a46ccbf4..83092fb025e 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -37,6 +37,7 @@
 #include <linux/quotaops.h>
 #include <linux/buffer_head.h>
 #include <linux/aio.h>
+#include <linux/smp_lock.h>
 
 #include "udf_i.h"
 #include "udf_sb.h"
@@ -144,50 +145,60 @@ static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
         return retval;
 }
 
-int udf_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
-              unsigned long arg)
+long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
+        struct inode *inode = filp->f_dentry->d_inode;
         long old_block, new_block;
         int result = -EINVAL;
 
+        lock_kernel();
+
         if (file_permission(filp, MAY_READ) != 0) {
-                udf_debug("no permission to access inode %lu\n",
-                          inode->i_ino);
-                return -EPERM;
+                udf_debug("no permission to access inode %lu\n", inode->i_ino);
+                result = -EPERM;
+                goto out;
         }
 
         if (!arg) {
                 udf_debug("invalid argument to udf_ioctl\n");
-                return -EINVAL;
+                result = -EINVAL;
+                goto out;
         }
 
         switch (cmd) {
         case UDF_GETVOLIDENT:
                 if (copy_to_user((char __user *)arg,
                                  UDF_SB(inode->i_sb)->s_volume_ident, 32))
-                        return -EFAULT;
+                        result = -EFAULT;
                 else
-                        return 0;
+                        result = 0;
+                goto out;
         case UDF_RELOCATE_BLOCKS:
-                if (!capable(CAP_SYS_ADMIN))
-                        return -EACCES;
-                if (get_user(old_block, (long __user *)arg))
-                        return -EFAULT;
+                if (!capable(CAP_SYS_ADMIN)) {
+                        result = -EACCES;
+                        goto out;
+                }
+                if (get_user(old_block, (long __user *)arg)) {
+                        result = -EFAULT;
+                        goto out;
+                }
                 result = udf_relocate_blocks(inode->i_sb,
                                                 old_block, &new_block);
                 if (result == 0)
                         result = put_user(new_block, (long __user *)arg);
-                return result;
+                goto out;
         case UDF_GETEASIZE:
                 result = put_user(UDF_I(inode)->i_lenEAttr, (int __user *)arg);
-                break;
+                goto out;
         case UDF_GETEABLOCK:
                 result = copy_to_user((char __user *)arg,
                                       UDF_I(inode)->i_ext.i_data,
                                       UDF_I(inode)->i_lenEAttr) ? -EFAULT : 0;
-                break;
+                goto out;
         }
 
+out:
+        unlock_kernel();
         return result;
 }
 
@@ -207,7 +218,7 @@ static int udf_release_file(struct inode *inode, struct file *filp)
 const struct file_operations udf_file_operations = {
         .read                   = do_sync_read,
         .aio_read               = generic_file_aio_read,
-        .ioctl                  = udf_ioctl,
+        .unlocked_ioctl         = udf_ioctl,
         .open                   = dquot_file_open,
         .mmap                   = generic_file_mmap,
         .write                  = do_sync_write,
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index 702a1148e70..9079ff7d625 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -130,8 +130,7 @@ extern int udf_write_fi(struct inode *inode, struct fileIdentDesc *,
                         uint8_t *, uint8_t *);
 
 /* file.c */
-extern int udf_ioctl(struct inode *, struct file *, unsigned int,
-                     unsigned long);
+extern long udf_ioctl(struct file *, unsigned int, unsigned long);
 extern int udf_setattr(struct dentry *dentry, struct iattr *iattr);
 /* inode.c */
 extern struct inode *udf_iget(struct super_block *, struct kernel_lb_addr *);