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zfs/include/linux/vfs_compat.h

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Linux 2.6.35 compat, fops->fsync() The fsync() callback in the file_operations structure used to take 3 arguments. The callback now only takes 2 arguments because the dentry argument was determined to be unused by all consumers. To handle this a compatibility prototype was added to ensure the right prototype is used. Our implementation never used the dentry argument either so it's just a matter of using the right prototype.
2011-02-11 16:58:55 +00:00
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (C) 2011 Lawrence Livermore National Security, LLC.
*/
#ifndef _ZFS_VFS_H
#define _ZFS_VFS_H
Linux 2.6.28 compat, insert_inode_locked() Added insert_inode_locked() helper function, prior to this most callers used insert_inode_hash(). The older method doesn't check for collisions in the inode_hashtable but it still acceptible for use. Fallback to using insert_inode_hash() when insert_inode_locked() is unavailable.
2011-03-22 16:55:09 +00:00
/*
* 2.6.28 API change,
* Added insert_inode_locked() helper function, prior to this most callers
* used insert_inode_hash(). The older method doesn't check for collisions
* in the inode_hashtable but it still acceptible for use.
*/
#ifndef HAVE_INSERT_INODE_LOCKED
static inline int
insert_inode_locked(struct inode *ip)
{
insert_inode_hash(ip);
return (0);
}
#endif /* HAVE_INSERT_INODE_LOCKED */
Linux 2.6.35 compat, fops->fsync() The fsync() callback in the file_operations structure used to take 3 arguments. The callback now only takes 2 arguments because the dentry argument was determined to be unused by all consumers. To handle this a compatibility prototype was added to ensure the right prototype is used. Our implementation never used the dentry argument either so it's just a matter of using the right prototype.
2011-02-11 16:58:55 +00:00
Tear down and flush the mmap region The inode eviction should unmap the pages associated with the inode. These pages should also be flushed to disk to avoid the data loss. Therefore, use truncate_setsize() in evict_inode() to release the pagecache. The API truncate_setsize() was added in 2.6.35 kernel. To ensure compatibility with the old kernel, the patch defines its own truncate_setsize function. Signed-off-by: Prasad Joshi <pjoshi@stec-inc.com> Closes #255
2011-06-25 12:30:29 +00:00
/*
* 2.6.35 API change,
* Add truncate_setsize() if it is not exported by the Linux kernel.
*
* Truncate the inode and pages associated with the inode. The pages are
* unmapped and removed from cache.
*/
#ifndef HAVE_TRUNCATE_SETSIZE
static inline void
truncate_setsize(struct inode *ip, loff_t new)
{
struct address_space *mapping = ip->i_mapping;
i_size_write(ip, new);
unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
truncate_inode_pages(mapping, new);
unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
}
#endif /* HAVE_TRUNCATE_SETSIZE */
Linux 2.6.35 compat, fops->fsync() The fsync() callback in the file_operations structure used to take 3 arguments. The callback now only takes 2 arguments because the dentry argument was determined to be unused by all consumers. To handle this a compatibility prototype was added to ensure the right prototype is used. Our implementation never used the dentry argument either so it's just a matter of using the right prototype.
2011-02-11 16:58:55 +00:00
#endif /* _ZFS_VFS_H */