Release 4.10 fs/ocfs2/ocfs2_ioctl.h
/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* ocfs2_ioctl.h
*
* Defines OCFS2 ioctls.
*
* Copyright (C) 2010 Oracle. 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, version 2, as published by the Free Software Foundation.
*
* 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
* General Public License for more details.
*/
#ifndef OCFS2_IOCTL_H
#define OCFS2_IOCTL_H
/*
* ioctl commands
*/
#define OCFS2_IOC_GETFLAGS FS_IOC_GETFLAGS
#define OCFS2_IOC_SETFLAGS FS_IOC_SETFLAGS
#define OCFS2_IOC32_GETFLAGS FS_IOC32_GETFLAGS
#define OCFS2_IOC32_SETFLAGS FS_IOC32_SETFLAGS
/*
* Space reservation / allocation / free ioctls and argument structure
* are designed to be compatible with XFS.
*
* ALLOCSP* and FREESP* are not and will never be supported, but are
* included here for completeness.
*/
struct ocfs2_space_resv {
__s16 l_type;
__s16 l_whence;
__s64 l_start;
__s64 l_len; /* len == 0 means until end of file */
__s32 l_sysid;
__u32 l_pid;
__s32 l_pad[4]; /* reserve area */
};
#define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv)
#define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv)
#define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv)
#define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv)
#define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv)
#define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv)
#define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv)
#define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv)
/* Used to pass group descriptor data when online resize is done */
struct ocfs2_new_group_input {
__u64 group; /* Group descriptor's blkno. */
__u32 clusters; /* Total number of clusters in this group */
__u32 frees; /* Total free clusters in this group */
__u16 chain; /* Chain for this group */
__u16 reserved1;
__u32 reserved2;
};
#define OCFS2_IOC_GROUP_EXTEND _IOW('o', 1, int)
#define OCFS2_IOC_GROUP_ADD _IOW('o', 2,struct ocfs2_new_group_input)
#define OCFS2_IOC_GROUP_ADD64 _IOW('o', 3,struct ocfs2_new_group_input)
/* Used to pass 2 file names to reflink. */
struct reflink_arguments {
__u64 old_path;
__u64 new_path;
__u64 preserve;
};
#define OCFS2_IOC_REFLINK _IOW('o', 4, struct reflink_arguments)
/* Following definitions dedicated for ocfs2_info_request ioctls. */
#define OCFS2_INFO_MAX_REQUEST (50)
#define OCFS2_TEXT_UUID_LEN (OCFS2_VOL_UUID_LEN * 2)
/* Magic number of all requests */
#define OCFS2_INFO_MAGIC (0x4F32494E)
/*
* Always try to separate info request into small pieces to
* guarantee the backward&forward compatibility.
*/
struct ocfs2_info {
__u64 oi_requests; /* Array of __u64 pointers to requests */
__u32 oi_count; /* Number of requests in info_requests */
__u32 oi_pad;
};
struct ocfs2_info_request {
/*00*/ __u32 ir_magic; /* Magic number */
__u32 ir_code; /* Info request code */
__u32 ir_size; /* Size of request */
__u32 ir_flags; /* Request flags */
/*10*/ /* Request specific fields */
};
struct ocfs2_info_clustersize {
struct ocfs2_info_request ic_req;
__u32 ic_clustersize;
__u32 ic_pad;
};
struct ocfs2_info_blocksize {
struct ocfs2_info_request ib_req;
__u32 ib_blocksize;
__u32 ib_pad;
};
struct ocfs2_info_maxslots {
struct ocfs2_info_request im_req;
__u32 im_max_slots;
__u32 im_pad;
};
struct ocfs2_info_label {
struct ocfs2_info_request il_req;
__u8 il_label[OCFS2_MAX_VOL_LABEL_LEN];
} __attribute__ ((packed));
struct ocfs2_info_uuid {
struct ocfs2_info_request iu_req;
__u8 iu_uuid_str[OCFS2_TEXT_UUID_LEN + 1];
} __attribute__ ((packed));
struct ocfs2_info_fs_features {
struct ocfs2_info_request if_req;
__u32 if_compat_features;
__u32 if_incompat_features;
__u32 if_ro_compat_features;
__u32 if_pad;
};
struct ocfs2_info_journal_size {
struct ocfs2_info_request ij_req;
__u64 ij_journal_size;
};
struct ocfs2_info_freeinode {
struct ocfs2_info_request ifi_req;
struct ocfs2_info_local_freeinode {
__u64 lfi_total;
__u64 lfi_free;
}
ifi_stat[OCFS2_MAX_SLOTS];
__u32 ifi_slotnum; /* out */
__u32 ifi_pad;
};
#define OCFS2_INFO_MAX_HIST (32)
struct ocfs2_info_freefrag {
struct ocfs2_info_request iff_req;
struct ocfs2_info_freefrag_stats { /* (out) */
struct ocfs2_info_free_chunk_list {
__u32 fc_chunks[OCFS2_INFO_MAX_HIST];
__u32 fc_clusters[OCFS2_INFO_MAX_HIST];
}
ffs_fc_hist;
__u32 ffs_clusters;
__u32 ffs_free_clusters;
__u32 ffs_free_chunks;
__u32 ffs_free_chunks_real;
__u32 ffs_min; /* Minimum free chunksize in clusters */
__u32 ffs_max;
__u32 ffs_avg;
__u32 ffs_pad;
}
iff_ffs;
__u32 iff_chunksize; /* chunksize in clusters(in) */
__u32 iff_pad;
};
/* Codes for ocfs2_info_request */
enum ocfs2_info_type {
OCFS2_INFO_CLUSTERSIZE = 1,
OCFS2_INFO_BLOCKSIZE,
OCFS2_INFO_MAXSLOTS,
OCFS2_INFO_LABEL,
OCFS2_INFO_UUID,
OCFS2_INFO_FS_FEATURES,
OCFS2_INFO_JOURNAL_SIZE,
OCFS2_INFO_FREEINODE,
OCFS2_INFO_FREEFRAG,
OCFS2_INFO_NUM_TYPES
};
/* Flags for struct ocfs2_info_request */
/* Filled by the caller */
#define OCFS2_INFO_FL_NON_COHERENT (0x00000001)
/* Cluster coherency not
required. This is a hint.
It is up to ocfs2 whether
the request can be fulfilled
without locking. */
/* Filled by ocfs2 */
#define OCFS2_INFO_FL_FILLED (0x40000000)
/* Filesystem understood
this request and
filled in the answer */
#define OCFS2_INFO_FL_ERROR (0x80000000)
/* Error happened during
request handling. */
#define OCFS2_IOC_INFO _IOR('o', 5, struct ocfs2_info)
struct ocfs2_move_extents {
/* All values are in bytes */
/* in */
__u64 me_start; /* Virtual start in the file to move */
__u64 me_len; /* Length of the extents to be moved */
__u64 me_goal; /* Physical offset of the goal,
it's in block unit */
__u64 me_threshold; /* Maximum distance from goal or threshold
for auto defragmentation */
__u64 me_flags; /* Flags for the operation:
* - auto defragmentation.
* - refcount,xattr cases.
*/
/* out */
__u64 me_moved_len; /* Moved/defraged length */
__u64 me_new_offset; /* Resulting physical location */
__u32 me_reserved[2]; /* Reserved for futhure */
};
#define OCFS2_MOVE_EXT_FL_AUTO_DEFRAG (0x00000001)
/* Kernel manages to
claim new clusters
as the goal place
for extents moving */
#define OCFS2_MOVE_EXT_FL_PART_DEFRAG (0x00000002)
/* Allow partial extent
moving, is to make
movement less likely
to fail, may make fs
even more fragmented */
#define OCFS2_MOVE_EXT_FL_COMPLETE (0x00000004)
/* Move or defragmenation
completely gets done.
*/
#define OCFS2_IOC_MOVE_EXT _IOW('o', 6, struct ocfs2_move_extents)
#endif /* OCFS2_IOCTL_H */
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