mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-30 08:04:13 +08:00
9fbe24d95e
The EFI/EFD item format definitions are shared with userspace. Split the out of header files that contain kernel only defintions to make it simple to shared them. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2000,2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef __XFS_EXTFREE_ITEM_H__
|
|
#define __XFS_EXTFREE_ITEM_H__
|
|
|
|
/* kernel only EFI/EFD definitions */
|
|
|
|
struct xfs_mount;
|
|
struct kmem_zone;
|
|
|
|
/*
|
|
* Max number of extents in fast allocation path.
|
|
*/
|
|
#define XFS_EFI_MAX_FAST_EXTENTS 16
|
|
|
|
/*
|
|
* Define EFI flag bits. Manipulated by set/clear/test_bit operators.
|
|
*/
|
|
#define XFS_EFI_RECOVERED 1
|
|
|
|
/*
|
|
* This is the "extent free intention" log item. It is used to log the fact
|
|
* that some extents need to be free. It is used in conjunction with the
|
|
* "extent free done" log item described below.
|
|
*
|
|
* The EFI is reference counted so that it is not freed prior to both the EFI
|
|
* and EFD being committed and unpinned. This ensures that when the last
|
|
* reference goes away the EFI will always be in the AIL as it has been
|
|
* unpinned, regardless of whether the EFD is processed before or after the EFI.
|
|
*/
|
|
typedef struct xfs_efi_log_item {
|
|
xfs_log_item_t efi_item;
|
|
atomic_t efi_refcount;
|
|
atomic_t efi_next_extent;
|
|
unsigned long efi_flags; /* misc flags */
|
|
xfs_efi_log_format_t efi_format;
|
|
} xfs_efi_log_item_t;
|
|
|
|
/*
|
|
* This is the "extent free done" log item. It is used to log
|
|
* the fact that some extents earlier mentioned in an efi item
|
|
* have been freed.
|
|
*/
|
|
typedef struct xfs_efd_log_item {
|
|
xfs_log_item_t efd_item;
|
|
xfs_efi_log_item_t *efd_efip;
|
|
uint efd_next_extent;
|
|
xfs_efd_log_format_t efd_format;
|
|
} xfs_efd_log_item_t;
|
|
|
|
/*
|
|
* Max number of extents in fast allocation path.
|
|
*/
|
|
#define XFS_EFD_MAX_FAST_EXTENTS 16
|
|
|
|
extern struct kmem_zone *xfs_efi_zone;
|
|
extern struct kmem_zone *xfs_efd_zone;
|
|
|
|
xfs_efi_log_item_t *xfs_efi_init(struct xfs_mount *, uint);
|
|
xfs_efd_log_item_t *xfs_efd_init(struct xfs_mount *, xfs_efi_log_item_t *,
|
|
uint);
|
|
int xfs_efi_copy_format(xfs_log_iovec_t *buf,
|
|
xfs_efi_log_format_t *dst_efi_fmt);
|
|
void xfs_efi_item_free(xfs_efi_log_item_t *);
|
|
|
|
#endif /* __XFS_EXTFREE_ITEM_H__ */
|