#include <linux/capability.h>
#include <linux/fs.h>
+#include <linux/mount.h>
#include <linux/reiserfs_fs.h>
#include <linux/time.h>
#include <asm/uaccess.h>
#include <linux/pagemap.h>
#include <linux/smp_lock.h>
-
-static int reiserfs_unpack(struct inode *inode, struct file *filp);
+#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 ...
-*/
+ * 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)
{
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 (IS_RDONLY(inode))
- return -EROFS;
-
- if ((current->fsuid != inode->i_uid)
- && !capable(CAP_FOWNER))
- return -EPERM;
+ if (!reiserfs_attrs(inode->i_sb)) {
+ err = -ENOTTY;
+ break;
+ }
- if (get_user(flags, (int __user *)arg))
- return -EFAULT;
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ break;
+ if (!is_owner_or_cap(inode)) {
+ err = -EPERM;
+ goto setflags_out;
+ }
+ if (get_user(flags, (int __user *)arg)) {
+ err = -EFAULT;
+ goto setflags_out;
+ }
+ /*
+ * Is it quota file? Do not allow user to mess with it
+ */
+ if (IS_NOQUOTA(inode)) {
+ err = -EPERM;
+ goto setflags_out;
+ }
if (((flags ^ REISERFS_I(inode)->
i_attrs) & (REISERFS_IMMUTABLE_FL |
REISERFS_APPEND_FL))
- && !capable(CAP_LINUX_IMMUTABLE))
- return -EPERM;
-
+ && !capable(CAP_LINUX_IMMUTABLE)) {
+ err = -EPERM;
+ goto setflags_out;
+ }
if ((flags & REISERFS_NOTAIL_FL) &&
S_ISREG(inode->i_mode)) {
int result;
result = reiserfs_unpack(inode, filp);
- if (result)
- return result;
+ if (result) {
+ err = result;
+ goto setflags_out;
+ }
}
sd_attrs_to_i_attrs(flags, inode);
REISERFS_I(inode)->i_attrs = flags;
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
- return 0;
+setflags_out:
+ mnt_drop_write(filp->f_path.mnt);
+ 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 ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
- return -EPERM;
- if (IS_RDONLY(inode))
- return -EROFS;
- if (get_user(inode->i_generation, (int __user *)arg))
- return -EFAULT;
+ if (!is_owner_or_cap(inode))
+ err = -EPERM;
+ break;
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ break;
+ if (get_user(inode->i_generation, (int __user *)arg)) {
+ err = -EFAULT;
+ goto setversion_out;
+ }
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
- return 0;
+setversion_out:
+ mnt_drop_write(filp->f_path.mnt);
+ break;
+ default:
+ 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:
+ cmd = REISERFS_IOC_UNPACK;
+ break;
+ case REISERFS_IOC32_GETFLAGS:
+ cmd = REISERFS_IOC_GETFLAGS;
+ break;
+ case REISERFS_IOC32_SETFLAGS:
+ cmd = REISERFS_IOC_SETFLAGS;
+ break;
+ case REISERFS_IOC32_GETVERSION:
+ cmd = REISERFS_IOC_GETVERSION;
+ break;
+ case REISERFS_IOC32_SETVERSION:
+ cmd = REISERFS_IOC_SETVERSION;
+ break;
default:
- return -ENOTTY;
+ return -ENOIOCTLCMD;
}
+
+ ret = reiserfs_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
+
+ return ret;
}
+#endif
+int reiserfs_commit_write(struct file *f, struct page *page,
+ unsigned from, unsigned to);
+int reiserfs_prepare_write(struct file *f, struct page *page,
+ unsigned from, unsigned to);
/*
** reiserfs_unpack
** Function try to convert tail from direct item into indirect.
** It set up nopack attribute in the REISERFS_I(inode)->nopack
*/
-static int reiserfs_unpack(struct inode *inode, struct file *filp)
+int reiserfs_unpack(struct inode *inode, struct file *filp)
{
int retval = 0;
int index;
}
/* we unpack by finding the page with the tail, and calling
- ** reiserfs_prepare_write on that page. This will force a
+ ** reiserfs_prepare_write on that page. This will force a
** reiserfs_get_block to unpack the tail for us.
*/
index = inode->i_size >> PAGE_CACHE_SHIFT;
if (!page) {
goto out;
}
- retval =
- mapping->a_ops->prepare_write(NULL, page, write_from, write_from);
+ retval = reiserfs_prepare_write(NULL, page, write_from, write_from);
if (retval)
goto out_unlock;
/* conversion can change page contents, must flush */
flush_dcache_page(page);
- retval =
- mapping->a_ops->commit_write(NULL, page, write_from, write_from);
+ retval = reiserfs_commit_write(NULL, page, write_from, write_from);
REISERFS_I(inode)->i_flags |= i_nopack_mask;
out_unlock:
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff