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nilfs2: move ioctl interface and disk layout to uapi separately

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The header file "include/linux/nilfs2_fs.h" is composed of parts for
ioctl and disk format, and both are intended to be shared with user
space programs.

This moves them to the uapi directory "include/uapi/linux" splitting the
file to "nilfs2_api.h" and "nilfs2_ondisk.h".  The following minor
changes are accompanied by this migration:

 - nilfs_direct_node struct in nilfs2/direct.h is converged to
   nilfs2_ondisk.h because it's an on-disk structure.
 - inline functions nilfs_rec_len_from_disk() and
   nilfs_rec_len_to_disk() are moved to nilfs2/dir.c.

Link: http://lkml.kernel.org/r/1465825507-3407-4-git-send-email-konishi.ryusuke@lab.ntt.co.jp
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ryusuke Konishi 2016-08-02 14:05:30 -07:00 committed by Linus Torvalds
parent 4ce5c3426c
commit e63e88bc53
18 changed files with 348 additions and 329 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Documentation/filesystems/nilfs2.txt
View File

@ -267,7 +267,8 @@ among NILFS2 files can be depicted as follows:
`-- file (ino=yy)
( regular file, directory, or symlink )
For detail on the format of each file, please see include/linux/nilfs2_fs.h.
For detail on the format of each file, please see nilfs2_ondisk.h
located at include/uapi/linux directory.
There are no patents or other intellectual property that we protect
with regard to the design of NILFS2. It is allowed to replicate the

2
Documentation/ioctl/ioctl-number.txt
View File

@ -248,7 +248,7 @@ Code Seq#(hex) Include File Comments
'm' 00 drivers/scsi/megaraid/megaraid_ioctl.h conflict!
'm' 00-1F net/irda/irmod.h conflict!
'n' 00-7F linux/ncp_fs.h and fs/ncpfs/ioctl.c
'n' 80-8F linux/nilfs2_fs.h NILFS2
'n' 80-8F uapi/linux/nilfs2_api.h NILFS2
'n' E0-FF linux/matroxfb.h matroxfb
'o' 00-1F fs/ocfs2/ocfs2_fs.h OCFS2
'o' 00-03 mtd/ubi-user.h conflict! (OCFS2 and UBI overlaps)

3
MAINTAINERS
View File

@ -8258,8 +8258,9 @@ T: git git://github.com/konis/nilfs2.git
S: Supported
F: Documentation/filesystems/nilfs2.txt
F: fs/nilfs2/
F: include/linux/nilfs2_fs.h
F: include/trace/events/nilfs2.h
F: include/uapi/linux/nilfs2_api.h
F: include/uapi/linux/nilfs2_ondisk.h
NINJA SCSI-3 / NINJA SCSI-32Bi (16bit/CardBus) PCMCIA SCSI HOST ADAPTER DRIVER
M: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>

2
fs/nilfs2/bmap.h
View File

@ -22,7 +22,7 @@
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/nilfs2_fs.h>
#include <linux/nilfs2_ondisk.h> /* nilfs_binfo, nilfs_inode, etc */
#include "alloc.h"
#include "dat.h"

2
fs/nilfs2/btree.h
View File

@ -22,7 +22,7 @@
#include <linux/types.h>
#include <linux/buffer_head.h>
#include <linux/list.h>
#include <linux/nilfs2_fs.h>
#include <linux/nilfs2_ondisk.h> /* nilfs_btree_node */
#include "btnode.h"
#include "bmap.h"

1
fs/nilfs2/cpfile.c
View File

@ -21,7 +21,6 @@
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <linux/errno.h>
#include <linux/nilfs2_fs.h>
#include "mdt.h"
#include "cpfile.h"

3
fs/nilfs2/cpfile.h
View File

@ -21,7 +21,8 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/nilfs2_fs.h>
#include <linux/nilfs2_api.h> /* nilfs_cpstat */
#include <linux/nilfs2_ondisk.h> /* nilfs_inode, nilfs_checkpoint */
int nilfs_cpfile_get_checkpoint(struct inode *, __u64, int,

1
fs/nilfs2/dat.h
View File

@ -22,6 +22,7 @@
#include <linux/types.h>
#include <linux/buffer_head.h>
#include <linux/fs.h>
#include <linux/nilfs2_ondisk.h> /* nilfs_inode, nilfs_checkpoint */
struct nilfs_palloc_req;

22
fs/nilfs2/dir.c
View File

@ -42,6 +42,28 @@
#include "nilfs.h"
#include "page.h"
static inline unsigned int nilfs_rec_len_from_disk(__le16 dlen)
{
unsigned int len = le16_to_cpu(dlen);
#if (PAGE_SIZE >= 65536)
if (len == NILFS_MAX_REC_LEN)
return 1 << 16;
#endif
return len;
}
static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
{
#if (PAGE_SIZE >= 65536)
if (len == (1 << 16))
return cpu_to_le16(NILFS_MAX_REC_LEN);
BUG_ON(len > (1 << 16));
#endif
return cpu_to_le16(len);
}
/*
* nilfs uses block-sized chunks. Arguably, sector-sized ones would be
* more robust, but we have what we have

10
fs/nilfs2/direct.h
View File

@ -24,16 +24,6 @@
#include "bmap.h"
/**
* struct nilfs_direct_node - direct node
* @dn_flags: flags
* @dn_pad: padding
*/
struct nilfs_direct_node {
__u8 dn_flags;
__u8 pad[7];
};
#define NILFS_DIRECT_NBLOCKS (NILFS_BMAP_SIZE / sizeof(__le64) - 1)
#define NILFS_DIRECT_KEY_MIN 0
#define NILFS_DIRECT_KEY_MAX (NILFS_DIRECT_NBLOCKS - 1)

1
fs/nilfs2/ifile.h
View File

@ -23,7 +23,6 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/nilfs2_fs.h>
#include "mdt.h"
#include "alloc.h"

1
fs/nilfs2/ioctl.c
View File

@ -25,7 +25,6 @@
#include <linux/compat.h> /* compat_ptr() */
#include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */
#include <linux/buffer_head.h>
#include <linux/nilfs2_fs.h>
#include "nilfs.h"
#include "segment.h"
#include "bmap.h"

3
fs/nilfs2/nilfs.h
View File

@ -23,7 +23,8 @@
#include <linux/buffer_head.h>
#include <linux/spinlock.h>
#include <linux/blkdev.h>
#include <linux/nilfs2_fs.h>
#include <linux/nilfs2_api.h>
#include <linux/nilfs2_ondisk.h>
#include "the_nilfs.h"
#include "bmap.h"

1
fs/nilfs2/segment.h
View File

@ -23,7 +23,6 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/workqueue.h>
#include <linux/nilfs2_fs.h>
#include "nilfs.h"
struct nilfs_root;

1
fs/nilfs2/sufile.c
View File

@ -22,7 +22,6 @@
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <linux/errno.h>
#include <linux/nilfs2_fs.h>
#include "mdt.h"
#include "sufile.h"

1
fs/nilfs2/sufile.h
View File

@ -21,7 +21,6 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/nilfs2_fs.h>
#include "mdt.h"

292
include/uapi/linux/nilfs2_api.h Normal file
View File

@ -0,0 +1,292 @@
/*
* nilfs2_api.h - NILFS2 user space API
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*/
#ifndef _LINUX_NILFS2_API_H
#define _LINUX_NILFS2_API_H
#include <linux/types.h>
#include <linux/ioctl.h>
/**
* struct nilfs_cpinfo - checkpoint information
* @ci_flags: flags
* @ci_pad: padding
* @ci_cno: checkpoint number
* @ci_create: creation timestamp
* @ci_nblk_inc: number of blocks incremented by this checkpoint
* @ci_inodes_count: inodes count
* @ci_blocks_count: blocks count
* @ci_next: next checkpoint number in snapshot list
*/
struct nilfs_cpinfo {
__u32 ci_flags;
__u32 ci_pad;
__u64 ci_cno;
__u64 ci_create;
__u64 ci_nblk_inc;
__u64 ci_inodes_count;
__u64 ci_blocks_count;
__u64 ci_next;
};
/* checkpoint flags */
enum {
NILFS_CPINFO_SNAPSHOT,
NILFS_CPINFO_INVALID,
NILFS_CPINFO_SKETCH,
NILFS_CPINFO_MINOR,
};
#define NILFS_CPINFO_FNS(flag, name) \
static inline int \
nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo) \
{ \
return !!(cpinfo->ci_flags & (1UL << NILFS_CPINFO_##flag)); \
}
NILFS_CPINFO_FNS(SNAPSHOT, snapshot)
NILFS_CPINFO_FNS(INVALID, invalid)
NILFS_CPINFO_FNS(MINOR, minor)
/**
* nilfs_suinfo - segment usage information
* @sui_lastmod: timestamp of last modification
* @sui_nblocks: number of written blocks in segment
* @sui_flags: segment usage flags
*/
struct nilfs_suinfo {
__u64 sui_lastmod;
__u32 sui_nblocks;
__u32 sui_flags;
};
/* segment usage flags */
enum {
NILFS_SUINFO_ACTIVE,
NILFS_SUINFO_DIRTY,
NILFS_SUINFO_ERROR,
};
#define NILFS_SUINFO_FNS(flag, name) \
static inline int \
nilfs_suinfo_##name(const struct nilfs_suinfo *si) \
{ \
return si->sui_flags & (1UL << NILFS_SUINFO_##flag); \
}
NILFS_SUINFO_FNS(ACTIVE, active)
NILFS_SUINFO_FNS(DIRTY, dirty)
NILFS_SUINFO_FNS(ERROR, error)
static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si)
{
return !si->sui_flags;
}
/**
* nilfs_suinfo_update - segment usage information update
* @sup_segnum: segment number
* @sup_flags: flags for which fields are active in sup_sui
* @sup_reserved: reserved necessary for alignment
* @sup_sui: segment usage information
*/
struct nilfs_suinfo_update {
__u64 sup_segnum;
__u32 sup_flags;
__u32 sup_reserved;
struct nilfs_suinfo sup_sui;
};
enum {
NILFS_SUINFO_UPDATE_LASTMOD,
NILFS_SUINFO_UPDATE_NBLOCKS,
NILFS_SUINFO_UPDATE_FLAGS,
__NR_NILFS_SUINFO_UPDATE_FIELDS,
};
#define NILFS_SUINFO_UPDATE_FNS(flag, name) \
static inline void \
nilfs_suinfo_update_set_##name(struct nilfs_suinfo_update *sup) \
{ \
sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag; \
} \
static inline void \
nilfs_suinfo_update_clear_##name(struct nilfs_suinfo_update *sup) \
{ \
sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag); \
} \
static inline int \
nilfs_suinfo_update_##name(const struct nilfs_suinfo_update *sup) \
{ \
return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\
}
NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod)
NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks)
NILFS_SUINFO_UPDATE_FNS(FLAGS, flags)
enum {
NILFS_CHECKPOINT,
NILFS_SNAPSHOT,
};
/**
* struct nilfs_cpmode - change checkpoint mode structure
* @cm_cno: checkpoint number
* @cm_mode: mode of checkpoint
* @cm_pad: padding
*/
struct nilfs_cpmode {
__u64 cm_cno;
__u32 cm_mode;
__u32 cm_pad;
};
/**
* struct nilfs_argv - argument vector
* @v_base: pointer on data array from userspace
* @v_nmembs: number of members in data array
* @v_size: size of data array in bytes
* @v_flags: flags
* @v_index: start number of target data items
*/
struct nilfs_argv {
__u64 v_base;
__u32 v_nmembs; /* number of members */
__u16 v_size; /* size of members */
__u16 v_flags;
__u64 v_index;
};
/**
* struct nilfs_period - period of checkpoint numbers
* @p_start: start checkpoint number (inclusive)
* @p_end: end checkpoint number (exclusive)
*/
struct nilfs_period {
__u64 p_start;
__u64 p_end;
};
/**
* struct nilfs_cpstat - checkpoint statistics
* @cs_cno: checkpoint number
* @cs_ncps: number of checkpoints
* @cs_nsss: number of snapshots
*/
struct nilfs_cpstat {
__u64 cs_cno;
__u64 cs_ncps;
__u64 cs_nsss;
};
/**
* struct nilfs_sustat - segment usage statistics
* @ss_nsegs: number of segments
* @ss_ncleansegs: number of clean segments
* @ss_ndirtysegs: number of dirty segments
* @ss_ctime: creation time of the last segment
* @ss_nongc_ctime: creation time of the last segment not for GC
* @ss_prot_seq: least sequence number of segments which must not be reclaimed
*/
struct nilfs_sustat {
__u64 ss_nsegs;
__u64 ss_ncleansegs;
__u64 ss_ndirtysegs;
__u64 ss_ctime;
__u64 ss_nongc_ctime;
__u64 ss_prot_seq;
};
/**
* struct nilfs_vinfo - virtual block number information
* @vi_vblocknr: virtual block number
* @vi_start: start checkpoint number (inclusive)
* @vi_end: end checkpoint number (exclusive)
* @vi_blocknr: disk block number
*/
struct nilfs_vinfo {
__u64 vi_vblocknr;
__u64 vi_start;
__u64 vi_end;
__u64 vi_blocknr;
};
/**
* struct nilfs_vdesc - descriptor of virtual block number
* @vd_ino: inode number
* @vd_cno: checkpoint number
* @vd_vblocknr: virtual block number
* @vd_period: period of checkpoint numbers
* @vd_blocknr: disk block number
* @vd_offset: logical block offset inside a file
* @vd_flags: flags (data or node block)
* @vd_pad: padding
*/
struct nilfs_vdesc {
__u64 vd_ino;
__u64 vd_cno;
__u64 vd_vblocknr;
struct nilfs_period vd_period;
__u64 vd_blocknr;
__u64 vd_offset;
__u32 vd_flags;
__u32 vd_pad;
};
/**
* struct nilfs_bdesc - descriptor of disk block number
* @bd_ino: inode number
* @bd_oblocknr: disk block address (for skipping dead blocks)
* @bd_blocknr: disk block address
* @bd_offset: logical block offset inside a file
* @bd_level: level in the b-tree organization
* @bd_pad: padding
*/
struct nilfs_bdesc {
__u64 bd_ino;
__u64 bd_oblocknr;
__u64 bd_blocknr;
__u64 bd_offset;
__u32 bd_level;
__u32 bd_pad;
};
#define NILFS_IOCTL_IDENT 'n'
#define NILFS_IOCTL_CHANGE_CPMODE \
_IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode)
#define NILFS_IOCTL_DELETE_CHECKPOINT \
_IOW(NILFS_IOCTL_IDENT, 0x81, __u64)
#define NILFS_IOCTL_GET_CPINFO \
_IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv)
#define NILFS_IOCTL_GET_CPSTAT \
_IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat)
#define NILFS_IOCTL_GET_SUINFO \
_IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv)
#define NILFS_IOCTL_GET_SUSTAT \
_IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat)
#define NILFS_IOCTL_GET_VINFO \
_IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv)
#define NILFS_IOCTL_GET_BDESCS \
_IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv)
#define NILFS_IOCTL_CLEAN_SEGMENTS \
_IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5])
#define NILFS_IOCTL_SYNC \
_IOR(NILFS_IOCTL_IDENT, 0x8A, __u64)
#define NILFS_IOCTL_RESIZE \
_IOW(NILFS_IOCTL_IDENT, 0x8B, __u64)
#define NILFS_IOCTL_SET_ALLOC_RANGE \
_IOW(NILFS_IOCTL_IDENT, 0x8C, __u64[2])
#define NILFS_IOCTL_SET_SUINFO \
_IOW(NILFS_IOCTL_IDENT, 0x8D, struct nilfs_argv)
#endif /* _LINUX_NILFS2_API_H */

328
include/linux/nilfs2_fs.h → include/uapi/linux/nilfs2_ondisk.h
View File

@ -1,5 +1,5 @@
/*
* nilfs2_fs.h - NILFS2 on-disk structures and common declarations.
* nilfs2_ondisk.h - NILFS2 on-disk structures
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*
@ -7,13 +7,6 @@
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* Written by Koji Sato and Ryusuke Konishi.
*/
/*
* linux/include/linux/ext2_fs.h
@ -30,16 +23,15 @@
* Copyright (C) 1991, 1992 Linus Torvalds
*/
#ifndef _LINUX_NILFS_FS_H
#define _LINUX_NILFS_FS_H
#ifndef _LINUX_NILFS2_ONDISK_H
#define _LINUX_NILFS2_ONDISK_H
#include <linux/types.h>
#include <linux/ioctl.h>
#include <linux/magic.h>
#include <linux/bug.h>
#define NILFS_INODE_BMAP_SIZE 7
/**
* struct nilfs_inode - structure of an inode on disk
* @i_blocks: blocks count
@ -56,7 +48,7 @@
* @i_bmap: block mapping
* @i_xattr: extended attributes
* @i_generation: file generation (for NFS)
* @i_pad: padding
* @i_pad: padding
*/
struct nilfs_inode {
__le64 i_blocks;
@ -338,29 +330,7 @@ enum {
#define NILFS_DIR_ROUND (NILFS_DIR_PAD - 1)
#define NILFS_DIR_REC_LEN(name_len) (((name_len) + 12 + NILFS_DIR_ROUND) & \
~NILFS_DIR_ROUND)
#define NILFS_MAX_REC_LEN ((1<<16)-1)
static inline unsigned int nilfs_rec_len_from_disk(__le16 dlen)
{
unsigned int len = le16_to_cpu(dlen);
#if !defined(__KERNEL__) || (PAGE_SIZE >= 65536)
if (len == NILFS_MAX_REC_LEN)
return 1 << 16;
#endif
return len;
}
static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
{
#if !defined(__KERNEL__) || (PAGE_SIZE >= 65536)
if (len == (1 << 16))
return cpu_to_le16(NILFS_MAX_REC_LEN);
else if (len > (1 << 16))
BUG();
#endif
return cpu_to_le16(len);
}
#define NILFS_MAX_REC_LEN ((1 << 16) - 1)
/**
* struct nilfs_finfo - file information
@ -374,11 +344,10 @@ struct nilfs_finfo {
__le64 fi_cno;
__le32 fi_nblocks;
__le32 fi_ndatablk;
/* array of virtual block numbers */
};
/**
* struct nilfs_binfo_v - information for the block to which a virtual block number is assigned
* struct nilfs_binfo_v - information on a data block (except DAT)
* @bi_vblocknr: virtual block number
* @bi_blkoff: block offset
*/
@ -388,7 +357,7 @@ struct nilfs_binfo_v {
};
/**
* struct nilfs_binfo_dat - information for the block which belongs to the DAT file
* struct nilfs_binfo_dat - information on a DAT node block
* @bi_blkoff: block offset
* @bi_level: level
* @bi_pad: padding
@ -454,7 +423,7 @@ struct nilfs_segment_summary {
#define NILFS_SS_GC 0x0010 /* segment written for cleaner operation */
/**
* struct nilfs_btree_node - B-tree node
* struct nilfs_btree_node - header of B-tree node block
* @bn_flags: flags
* @bn_level: level
* @bn_nchildren: number of children
@ -475,6 +444,16 @@ struct nilfs_btree_node {
#define NILFS_BTREE_LEVEL_NODE_MIN (NILFS_BTREE_LEVEL_DATA + 1)
#define NILFS_BTREE_LEVEL_MAX 14 /* Max level (exclusive) */
/**
* struct nilfs_direct_node - header of built-in bmap array
* @dn_flags: flags
* @dn_pad: padding
*/
struct nilfs_direct_node {
__u8 dn_flags;
__u8 pad[7];
};
/**
* struct nilfs_palloc_group_desc - block group descriptor
* @pg_nfrees: number of free entries in block group
@ -573,40 +552,6 @@ NILFS_CHECKPOINT_FNS(SNAPSHOT, snapshot)
NILFS_CHECKPOINT_FNS(INVALID, invalid)
NILFS_CHECKPOINT_FNS(MINOR, minor)
/**
* struct nilfs_cpinfo - checkpoint information
* @ci_flags: flags
* @ci_pad: padding
* @ci_cno: checkpoint number
* @ci_create: creation timestamp
* @ci_nblk_inc: number of blocks incremented by this checkpoint
* @ci_inodes_count: inodes count
* @ci_blocks_count: blocks count
* @ci_next: next checkpoint number in snapshot list
*/
struct nilfs_cpinfo {
__u32 ci_flags;
__u32 ci_pad;
__u64 ci_cno;
__u64 ci_create;
__u64 ci_nblk_inc;
__u64 ci_inodes_count;
__u64 ci_blocks_count;
__u64 ci_next;
};
#define NILFS_CPINFO_FNS(flag, name) \
static inline int \
nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo) \
{ \
return !!(cpinfo->ci_flags & (1UL << NILFS_CHECKPOINT_##flag)); \
}
NILFS_CPINFO_FNS(SNAPSHOT, snapshot)
NILFS_CPINFO_FNS(INVALID, invalid)
NILFS_CPINFO_FNS(MINOR, minor)
/**
* struct nilfs_cpfile_header - checkpoint file header
* @ch_ncheckpoints: number of checkpoints
@ -619,7 +564,7 @@ struct nilfs_cpfile_header {
struct nilfs_snapshot_list ch_snapshot_list;
};
#define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET \
#define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET \
((sizeof(struct nilfs_cpfile_header) + \
sizeof(struct nilfs_checkpoint) - 1) / \
sizeof(struct nilfs_checkpoint))
@ -643,8 +588,6 @@ enum {
NILFS_SEGMENT_USAGE_ACTIVE,
NILFS_SEGMENT_USAGE_DIRTY,
NILFS_SEGMENT_USAGE_ERROR,
/* ... */
};
#define NILFS_SEGMENT_USAGE_FNS(flag, name) \
@ -699,236 +642,9 @@ struct nilfs_sufile_header {
/* ... */
};
#define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET \
#define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET \
((sizeof(struct nilfs_sufile_header) + \
sizeof(struct nilfs_segment_usage) - 1) / \
sizeof(struct nilfs_segment_usage))
/**
* nilfs_suinfo - segment usage information
* @sui_lastmod: timestamp of last modification
* @sui_nblocks: number of written blocks in segment
* @sui_flags: segment usage flags
*/
struct nilfs_suinfo {
__u64 sui_lastmod;
__u32 sui_nblocks;
__u32 sui_flags;
};
#define NILFS_SUINFO_FNS(flag, name) \
static inline int \
nilfs_suinfo_##name(const struct nilfs_suinfo *si) \
{ \
return si->sui_flags & (1UL << NILFS_SEGMENT_USAGE_##flag); \
}
NILFS_SUINFO_FNS(ACTIVE, active)
NILFS_SUINFO_FNS(DIRTY, dirty)
NILFS_SUINFO_FNS(ERROR, error)
static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si)
{
return !si->sui_flags;
}
/* ioctl */
/**
* nilfs_suinfo_update - segment usage information update
* @sup_segnum: segment number
* @sup_flags: flags for which fields are active in sup_sui
* @sup_reserved: reserved necessary for alignment
* @sup_sui: segment usage information
*/
struct nilfs_suinfo_update {
__u64 sup_segnum;
__u32 sup_flags;
__u32 sup_reserved;
struct nilfs_suinfo sup_sui;
};
enum {
NILFS_SUINFO_UPDATE_LASTMOD,
NILFS_SUINFO_UPDATE_NBLOCKS,
NILFS_SUINFO_UPDATE_FLAGS,
__NR_NILFS_SUINFO_UPDATE_FIELDS,
};
#define NILFS_SUINFO_UPDATE_FNS(flag, name) \
static inline void \
nilfs_suinfo_update_set_##name(struct nilfs_suinfo_update *sup) \
{ \
sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag; \
} \
static inline void \
nilfs_suinfo_update_clear_##name(struct nilfs_suinfo_update *sup) \
{ \
sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag); \
} \
static inline int \
nilfs_suinfo_update_##name(const struct nilfs_suinfo_update *sup) \
{ \
return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\
}
NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod)
NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks)
NILFS_SUINFO_UPDATE_FNS(FLAGS, flags)
enum {
NILFS_CHECKPOINT,
NILFS_SNAPSHOT,
};
/**
* struct nilfs_cpmode - change checkpoint mode structure
* @cm_cno: checkpoint number
* @cm_mode: mode of checkpoint
* @cm_pad: padding
*/
struct nilfs_cpmode {
__u64 cm_cno;
__u32 cm_mode;
__u32 cm_pad;
};
/**
* struct nilfs_argv - argument vector
* @v_base: pointer on data array from userspace
* @v_nmembs: number of members in data array
* @v_size: size of data array in bytes
* @v_flags: flags
* @v_index: start number of target data items
*/
struct nilfs_argv {
__u64 v_base;
__u32 v_nmembs; /* number of members */
__u16 v_size; /* size of members */
__u16 v_flags;
__u64 v_index;
};
/**
* struct nilfs_period - period of checkpoint numbers
* @p_start: start checkpoint number (inclusive)
* @p_end: end checkpoint number (exclusive)
*/
struct nilfs_period {
__u64 p_start;
__u64 p_end;
};
/**
* struct nilfs_cpstat - checkpoint statistics
* @cs_cno: checkpoint number
* @cs_ncps: number of checkpoints
* @cs_nsss: number of snapshots
*/
struct nilfs_cpstat {
__u64 cs_cno;
__u64 cs_ncps;
__u64 cs_nsss;
};
/**
* struct nilfs_sustat - segment usage statistics
* @ss_nsegs: number of segments
* @ss_ncleansegs: number of clean segments
* @ss_ndirtysegs: number of dirty segments
* @ss_ctime: creation time of the last segment
* @ss_nongc_ctime: creation time of the last segment not for GC
* @ss_prot_seq: least sequence number of segments which must not be reclaimed
*/
struct nilfs_sustat {
__u64 ss_nsegs;
__u64 ss_ncleansegs;
__u64 ss_ndirtysegs;
__u64 ss_ctime;
__u64 ss_nongc_ctime;
__u64 ss_prot_seq;
};
/**
* struct nilfs_vinfo - virtual block number information
* @vi_vblocknr: virtual block number
* @vi_start: start checkpoint number (inclusive)
* @vi_end: end checkpoint number (exclusive)
* @vi_blocknr: disk block number
*/
struct nilfs_vinfo {
__u64 vi_vblocknr;
__u64 vi_start;
__u64 vi_end;
__u64 vi_blocknr;
};
/**
* struct nilfs_vdesc - descriptor of virtual block number
* @vd_ino: inode number
* @vd_cno: checkpoint number
* @vd_vblocknr: virtual block number
* @vd_period: period of checkpoint numbers
* @vd_blocknr: disk block number
* @vd_offset: logical block offset inside a file
* @vd_flags: flags (data or node block)
* @vd_pad: padding
*/
struct nilfs_vdesc {
__u64 vd_ino;
__u64 vd_cno;
__u64 vd_vblocknr;
struct nilfs_period vd_period;
__u64 vd_blocknr;
__u64 vd_offset;
__u32 vd_flags;
__u32 vd_pad;
};
/**
* struct nilfs_bdesc - descriptor of disk block number
* @bd_ino: inode number
* @bd_oblocknr: disk block address (for skipping dead blocks)
* @bd_blocknr: disk block address
* @bd_offset: logical block offset inside a file
* @bd_level: level in the b-tree organization
* @bd_pad: padding
*/
struct nilfs_bdesc {
__u64 bd_ino;
__u64 bd_oblocknr;
__u64 bd_blocknr;
__u64 bd_offset;
__u32 bd_level;
__u32 bd_pad;
};
#define NILFS_IOCTL_IDENT 'n'
#define NILFS_IOCTL_CHANGE_CPMODE \
_IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode)
#define NILFS_IOCTL_DELETE_CHECKPOINT \
_IOW(NILFS_IOCTL_IDENT, 0x81, __u64)
#define NILFS_IOCTL_GET_CPINFO \
_IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv)
#define NILFS_IOCTL_GET_CPSTAT \
_IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat)
#define NILFS_IOCTL_GET_SUINFO \
_IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv)
#define NILFS_IOCTL_GET_SUSTAT \
_IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat)
#define NILFS_IOCTL_GET_VINFO \
_IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv)
#define NILFS_IOCTL_GET_BDESCS \
_IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv)
#define NILFS_IOCTL_CLEAN_SEGMENTS \
_IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5])
#define NILFS_IOCTL_SYNC \
_IOR(NILFS_IOCTL_IDENT, 0x8A, __u64)
#define NILFS_IOCTL_RESIZE \
_IOW(NILFS_IOCTL_IDENT, 0x8B, __u64)
#define NILFS_IOCTL_SET_ALLOC_RANGE \
_IOW(NILFS_IOCTL_IDENT, 0x8C, __u64[2])
#define NILFS_IOCTL_SET_SUINFO \
_IOW(NILFS_IOCTL_IDENT, 0x8D, struct nilfs_argv)
#endif /* _LINUX_NILFS_FS_H */
#endif /* _LINUX_NILFS2_ONDISK_H */