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-rw-r--r--fs/reiserfs/ioctl.c77
1 files changed, 43 insertions, 34 deletions
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index 0ccc3fdda7bf..ace77451ceb1 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -13,44 +13,52 @@
#include <linux/compat.h>
/*
-** reiserfs_ioctl - handler for ioctl for inode
-** supported commands:
-** 1) REISERFS_IOC_UNPACK - try to unpack tail from direct item into indirect
-** and prevent packing file (argument arg has to be non-zero)
-** 2) REISERFS_IOC_[GS]ETFLAGS, REISERFS_IOC_[GS]ETVERSION
-** 3) That's all for a while ...
-*/
-int reiserfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
+ * reiserfs_ioctl - handler for ioctl for inode
+ * supported commands:
+ * 1) REISERFS_IOC_UNPACK - try to unpack tail from direct item into indirect
+ * and prevent packing file (argument arg has to be non-zero)
+ * 2) REISERFS_IOC_[GS]ETFLAGS, REISERFS_IOC_[GS]ETVERSION
+ * 3) That's all for a while ...
+ */
+long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
+ struct inode *inode = filp->f_path.dentry->d_inode;
unsigned int flags;
int err = 0;
+ reiserfs_write_lock(inode->i_sb);
+
switch (cmd) {
case REISERFS_IOC_UNPACK:
if (S_ISREG(inode->i_mode)) {
if (arg)
- return reiserfs_unpack(inode, filp);
- else
- return 0;
+ err = reiserfs_unpack(inode, filp);
} else
- return -ENOTTY;
- /* following two cases are taken from fs/ext2/ioctl.c by Remy
- Card (card@masi.ibp.fr) */
+ err = -ENOTTY;
+ break;
+ /*
+ * following two cases are taken from fs/ext2/ioctl.c by Remy
+ * Card (card@masi.ibp.fr)
+ */
case REISERFS_IOC_GETFLAGS:
- if (!reiserfs_attrs(inode->i_sb))
- return -ENOTTY;
+ if (!reiserfs_attrs(inode->i_sb)) {
+ err = -ENOTTY;
+ break;
+ }
flags = REISERFS_I(inode)->i_attrs;
i_attrs_to_sd_attrs(inode, (__u16 *) & flags);
- return put_user(flags, (int __user *)arg);
+ err = put_user(flags, (int __user *)arg);
+ break;
case REISERFS_IOC_SETFLAGS:{
- if (!reiserfs_attrs(inode->i_sb))
- return -ENOTTY;
+ if (!reiserfs_attrs(inode->i_sb)) {
+ err = -ENOTTY;
+ break;
+ }
err = mnt_want_write(filp->f_path.mnt);
if (err)
- return err;
+ break;
if (!is_owner_or_cap(inode)) {
err = -EPERM;
@@ -90,16 +98,18 @@ int reiserfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
mark_inode_dirty(inode);
setflags_out:
mnt_drop_write(filp->f_path.mnt);
- return err;
+ break;
}
case REISERFS_IOC_GETVERSION:
- return put_user(inode->i_generation, (int __user *)arg);
+ err = put_user(inode->i_generation, (int __user *)arg);
+ break;
case REISERFS_IOC_SETVERSION:
if (!is_owner_or_cap(inode))
- return -EPERM;
+ err = -EPERM;
+ break;
err = mnt_want_write(filp->f_path.mnt);
if (err)
- return err;
+ break;
if (get_user(inode->i_generation, (int __user *)arg)) {
err = -EFAULT;
goto setversion_out;
@@ -108,19 +118,20 @@ setflags_out:
mark_inode_dirty(inode);
setversion_out:
mnt_drop_write(filp->f_path.mnt);
- return err;
+ break;
default:
- return -ENOTTY;
+ err = -ENOTTY;
}
+
+ reiserfs_write_unlock(inode->i_sb);
+
+ return err;
}
#ifdef CONFIG_COMPAT
long reiserfs_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
- struct inode *inode = file->f_path.dentry->d_inode;
- int ret;
-
/* These are just misnamed, they actually get/put from/to user an int */
switch (cmd) {
case REISERFS_IOC32_UNPACK:
@@ -141,10 +152,8 @@ long reiserfs_compat_ioctl(struct file *file, unsigned int cmd,
default:
return -ENOIOCTLCMD;
}
- lock_kernel();
- ret = reiserfs_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
- unlock_kernel();
- return ret;
+
+ return reiserfs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
}
#endif