* Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
*/
+#include <linux/capability.h>
#include <linux/fs.h>
#include <linux/reiserfs_fs.h>
#include <linux/time.h>
#include <linux/pagemap.h>
#include <linux/smp_lock.h>
-static int reiserfs_unpack (struct inode * inode, struct file * filp);
+static int reiserfs_unpack(struct inode *inode, struct file *filp);
/*
** reiserfs_ioctl - handler for ioctl for inode
** 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)
+int reiserfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+ unsigned long arg)
{
unsigned int flags;
switch (cmd) {
- case REISERFS_IOC_UNPACK:
- if( S_ISREG( inode -> i_mode ) ) {
- if (arg)
- return reiserfs_unpack (inode, filp);
+ case REISERFS_IOC_UNPACK:
+ if (S_ISREG(inode->i_mode)) {
+ if (arg)
+ return reiserfs_unpack(inode, filp);
else
return 0;
} else
return -ENOTTY;
- /* following two cases are taken from fs/ext2/ioctl.c by Remy
- Card (card@masi.ibp.fr) */
+ /* following two cases are taken from fs/ext2/ioctl.c by Remy
+ Card (card@masi.ibp.fr) */
case REISERFS_IOC_GETFLAGS:
- flags = REISERFS_I(inode) -> i_attrs;
- i_attrs_to_sd_attrs( inode, ( __u16 * ) &flags );
- return put_user(flags, (int __user *) arg);
- case REISERFS_IOC_SETFLAGS: {
- if (IS_RDONLY(inode))
- return -EROFS;
+ if (!reiserfs_attrs(inode->i_sb))
+ return -ENOTTY;
- if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
- return -EPERM;
+ flags = REISERFS_I(inode)->i_attrs;
+ i_attrs_to_sd_attrs(inode, (__u16 *) & flags);
+ return put_user(flags, (int __user *)arg);
+ case REISERFS_IOC_SETFLAGS:{
+ if (!reiserfs_attrs(inode->i_sb))
+ return -ENOTTY;
- if (get_user(flags, (int __user *) arg))
- return -EFAULT;
+ if (IS_RDONLY(inode))
+ return -EROFS;
- if ( ( ( flags ^ REISERFS_I(inode) -> i_attrs) & ( REISERFS_IMMUTABLE_FL | REISERFS_APPEND_FL)) &&
- !capable( CAP_LINUX_IMMUTABLE ) )
- return -EPERM;
-
- if( ( flags & REISERFS_NOTAIL_FL ) &&
- S_ISREG( inode -> i_mode ) ) {
+ if ((current->fsuid != inode->i_uid)
+ && !capable(CAP_FOWNER))
+ return -EPERM;
+
+ if (get_user(flags, (int __user *)arg))
+ return -EFAULT;
+
+ if (((flags ^ REISERFS_I(inode)->
+ i_attrs) & (REISERFS_IMMUTABLE_FL |
+ REISERFS_APPEND_FL))
+ && !capable(CAP_LINUX_IMMUTABLE))
+ return -EPERM;
+
+ if ((flags & REISERFS_NOTAIL_FL) &&
+ S_ISREG(inode->i_mode)) {
int result;
- result = reiserfs_unpack( inode, filp );
- if( result )
+ result = reiserfs_unpack(inode, filp);
+ if (result)
return result;
+ }
+ 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;
}
- 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;
- }
case REISERFS_IOC_GETVERSION:
- return put_user(inode->i_generation, (int __user *) arg);
+ return put_user(inode->i_generation, (int __user *)arg);
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 (get_user(inode->i_generation, (int __user *)arg))
+ return -EFAULT;
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
return 0;
** 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)
+static int reiserfs_unpack(struct inode *inode, struct file *filp)
{
- int retval = 0;
- int index ;
- struct page *page ;
- struct address_space *mapping ;
- unsigned long write_from ;
- unsigned long blocksize = inode->i_sb->s_blocksize ;
-
- if (inode->i_size == 0) {
- REISERFS_I(inode)->i_flags |= i_nopack_mask;
- return 0 ;
- }
- /* ioctl already done */
- if (REISERFS_I(inode)->i_flags & i_nopack_mask) {
- return 0 ;
- }
- reiserfs_write_lock(inode->i_sb);
-
- /* we need to make sure nobody is changing the file size beneath
- ** us
- */
- down(&inode->i_sem) ;
-
- write_from = inode->i_size & (blocksize - 1) ;
- /* if we are on a block boundary, we are already unpacked. */
- if ( write_from == 0) {
+ int retval = 0;
+ int index;
+ struct page *page;
+ struct address_space *mapping;
+ unsigned long write_from;
+ unsigned long blocksize = inode->i_sb->s_blocksize;
+
+ if (inode->i_size == 0) {
+ REISERFS_I(inode)->i_flags |= i_nopack_mask;
+ return 0;
+ }
+ /* ioctl already done */
+ if (REISERFS_I(inode)->i_flags & i_nopack_mask) {
+ return 0;
+ }
+
+ /* we need to make sure nobody is changing the file size beneath
+ ** us
+ */
+ mutex_lock(&inode->i_mutex);
+ reiserfs_write_lock(inode->i_sb);
+
+ write_from = inode->i_size & (blocksize - 1);
+ /* if we are on a block boundary, we are already unpacked. */
+ if (write_from == 0) {
+ REISERFS_I(inode)->i_flags |= i_nopack_mask;
+ goto out;
+ }
+
+ /* we unpack by finding the page with the tail, and calling
+ ** 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;
+ mapping = inode->i_mapping;
+ page = grab_cache_page(mapping, index);
+ retval = -ENOMEM;
+ if (!page) {
+ goto out;
+ }
+ retval =
+ mapping->a_ops->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);
REISERFS_I(inode)->i_flags |= i_nopack_mask;
- goto out ;
- }
-
- /* we unpack by finding the page with the tail, and calling
- ** 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 ;
- mapping = inode->i_mapping ;
- page = grab_cache_page(mapping, index) ;
- retval = -ENOMEM;
- if (!page) {
- goto out ;
- }
- retval = mapping->a_ops->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) ;
- REISERFS_I(inode)->i_flags |= i_nopack_mask;
-
-out_unlock:
- unlock_page(page) ;
- page_cache_release(page) ;
-
-out:
- up(&inode->i_sem) ;
- reiserfs_write_unlock(inode->i_sb);
- return retval;
+
+ out_unlock:
+ unlock_page(page);
+ page_cache_release(page);
+
+ out:
+ mutex_unlock(&inode->i_mutex);
+ reiserfs_write_unlock(inode->i_sb);
+ return retval;
}
git.openpandora.org / pandora-kernel.git / blobdiff