diff options
author | orivej <orivej@yandex-team.ru> | 2022-02-10 16:45:01 +0300 |
---|---|---|
committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:45:01 +0300 |
commit | 2d37894b1b037cf24231090eda8589bbb44fb6fc (patch) | |
tree | be835aa92c6248212e705f25388ebafcf84bc7a1 /contrib/libs/linux-headers/linux/virtio_blk.h | |
parent | 718c552901d703c502ccbefdfc3c9028d608b947 (diff) | |
download | ydb-2d37894b1b037cf24231090eda8589bbb44fb6fc.tar.gz |
Restoring authorship annotation for <orivej@yandex-team.ru>. Commit 2 of 2.
Diffstat (limited to 'contrib/libs/linux-headers/linux/virtio_blk.h')
-rw-r--r-- | contrib/libs/linux-headers/linux/virtio_blk.h | 402 |
1 files changed, 201 insertions, 201 deletions
diff --git a/contrib/libs/linux-headers/linux/virtio_blk.h b/contrib/libs/linux-headers/linux/virtio_blk.h index 40f85bbecb..401046f7e8 100644 --- a/contrib/libs/linux-headers/linux/virtio_blk.h +++ b/contrib/libs/linux-headers/linux/virtio_blk.h @@ -1,201 +1,201 @@ -#ifndef _LINUX_VIRTIO_BLK_H -#define _LINUX_VIRTIO_BLK_H -/* This header is BSD licensed so anyone can use the definitions to implement - * compatible drivers/servers. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of IBM nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. */ -#include <linux/types.h> -#include <linux/virtio_ids.h> -#include <linux/virtio_config.h> -#include <linux/virtio_types.h> - -/* Feature bits */ -#define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size */ -#define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments */ -#define VIRTIO_BLK_F_GEOMETRY 4 /* Legacy geometry available */ -#define VIRTIO_BLK_F_RO 5 /* Disk is read-only */ -#define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available*/ -#define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is available */ -#define VIRTIO_BLK_F_MQ 12 /* support more than one vq */ -#define VIRTIO_BLK_F_DISCARD 13 /* DISCARD is supported */ -#define VIRTIO_BLK_F_WRITE_ZEROES 14 /* WRITE ZEROES is supported */ - -/* Legacy feature bits */ -#ifndef VIRTIO_BLK_NO_LEGACY -#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */ -#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */ -#define VIRTIO_BLK_F_FLUSH 9 /* Flush command supported */ -#define VIRTIO_BLK_F_CONFIG_WCE 11 /* Writeback mode available in config */ -/* Old (deprecated) name for VIRTIO_BLK_F_FLUSH. */ -#define VIRTIO_BLK_F_WCE VIRTIO_BLK_F_FLUSH -#endif /* !VIRTIO_BLK_NO_LEGACY */ - -#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */ - -struct virtio_blk_config { - /* The capacity (in 512-byte sectors). */ - __u64 capacity; - /* The maximum segment size (if VIRTIO_BLK_F_SIZE_MAX) */ - __u32 size_max; - /* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */ - __u32 seg_max; - /* geometry of the device (if VIRTIO_BLK_F_GEOMETRY) */ - struct virtio_blk_geometry { - __u16 cylinders; - __u8 heads; - __u8 sectors; - } geometry; - - /* block size of device (if VIRTIO_BLK_F_BLK_SIZE) */ - __u32 blk_size; - - /* the next 4 entries are guarded by VIRTIO_BLK_F_TOPOLOGY */ - /* exponent for physical block per logical block. */ - __u8 physical_block_exp; - /* alignment offset in logical blocks. */ - __u8 alignment_offset; - /* minimum I/O size without performance penalty in logical blocks. */ - __u16 min_io_size; - /* optimal sustained I/O size in logical blocks. */ - __u32 opt_io_size; - - /* writeback mode (if VIRTIO_BLK_F_CONFIG_WCE) */ - __u8 wce; - __u8 unused; - - /* number of vqs, only available when VIRTIO_BLK_F_MQ is set */ - __u16 num_queues; - - /* the next 3 entries are guarded by VIRTIO_BLK_F_DISCARD */ - /* - * The maximum discard sectors (in 512-byte sectors) for - * one segment. - */ - __u32 max_discard_sectors; - /* - * The maximum number of discard segments in a - * discard command. - */ - __u32 max_discard_seg; - /* Discard commands must be aligned to this number of sectors. */ - __u32 discard_sector_alignment; - - /* the next 3 entries are guarded by VIRTIO_BLK_F_WRITE_ZEROES */ - /* - * The maximum number of write zeroes sectors (in 512-byte sectors) in - * one segment. - */ - __u32 max_write_zeroes_sectors; - /* - * The maximum number of segments in a write zeroes - * command. - */ - __u32 max_write_zeroes_seg; - /* - * Set if a VIRTIO_BLK_T_WRITE_ZEROES request may result in the - * deallocation of one or more of the sectors. - */ - __u8 write_zeroes_may_unmap; - - __u8 unused1[3]; -} __attribute__((packed)); - -/* - * Command types - * - * Usage is a bit tricky as some bits are used as flags and some are not. - * - * Rules: - * VIRTIO_BLK_T_OUT may be combined with VIRTIO_BLK_T_SCSI_CMD or - * VIRTIO_BLK_T_BARRIER. VIRTIO_BLK_T_FLUSH is a command of its own - * and may not be combined with any of the other flags. - */ - -/* These two define direction. */ -#define VIRTIO_BLK_T_IN 0 -#define VIRTIO_BLK_T_OUT 1 - -#ifndef VIRTIO_BLK_NO_LEGACY -/* This bit says it's a scsi command, not an actual read or write. */ -#define VIRTIO_BLK_T_SCSI_CMD 2 -#endif /* VIRTIO_BLK_NO_LEGACY */ - -/* Cache flush command */ -#define VIRTIO_BLK_T_FLUSH 4 - -/* Get device ID command */ -#define VIRTIO_BLK_T_GET_ID 8 - -/* Discard command */ -#define VIRTIO_BLK_T_DISCARD 11 - -/* Write zeroes command */ -#define VIRTIO_BLK_T_WRITE_ZEROES 13 - -#ifndef VIRTIO_BLK_NO_LEGACY -/* Barrier before this op. */ -#define VIRTIO_BLK_T_BARRIER 0x80000000 -#endif /* !VIRTIO_BLK_NO_LEGACY */ - -/* - * This comes first in the read scatter-gather list. - * For legacy virtio, if VIRTIO_F_ANY_LAYOUT is not negotiated, - * this is the first element of the read scatter-gather list. - */ -struct virtio_blk_outhdr { - /* VIRTIO_BLK_T* */ - __virtio32 type; - /* io priority. */ - __virtio32 ioprio; - /* Sector (ie. 512 byte offset) */ - __virtio64 sector; -}; - -/* Unmap this range (only valid for write zeroes command) */ -#define VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP 0x00000001 - -/* Discard/write zeroes range for each request. */ -struct virtio_blk_discard_write_zeroes { - /* discard/write zeroes start sector */ - __le64 sector; - /* number of discard/write zeroes sectors */ - __le32 num_sectors; - /* flags for this range */ - __le32 flags; -}; - -#ifndef VIRTIO_BLK_NO_LEGACY -struct virtio_scsi_inhdr { - __virtio32 errors; - __virtio32 data_len; - __virtio32 sense_len; - __virtio32 residual; -}; -#endif /* !VIRTIO_BLK_NO_LEGACY */ - -/* And this is the final byte of the write scatter-gather list. */ -#define VIRTIO_BLK_S_OK 0 -#define VIRTIO_BLK_S_IOERR 1 -#define VIRTIO_BLK_S_UNSUPP 2 -#endif /* _LINUX_VIRTIO_BLK_H */ +#ifndef _LINUX_VIRTIO_BLK_H +#define _LINUX_VIRTIO_BLK_H +/* This header is BSD licensed so anyone can use the definitions to implement + * compatible drivers/servers. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of IBM nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. */ +#include <linux/types.h> +#include <linux/virtio_ids.h> +#include <linux/virtio_config.h> +#include <linux/virtio_types.h> + +/* Feature bits */ +#define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size */ +#define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments */ +#define VIRTIO_BLK_F_GEOMETRY 4 /* Legacy geometry available */ +#define VIRTIO_BLK_F_RO 5 /* Disk is read-only */ +#define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available*/ +#define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is available */ +#define VIRTIO_BLK_F_MQ 12 /* support more than one vq */ +#define VIRTIO_BLK_F_DISCARD 13 /* DISCARD is supported */ +#define VIRTIO_BLK_F_WRITE_ZEROES 14 /* WRITE ZEROES is supported */ + +/* Legacy feature bits */ +#ifndef VIRTIO_BLK_NO_LEGACY +#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */ +#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */ +#define VIRTIO_BLK_F_FLUSH 9 /* Flush command supported */ +#define VIRTIO_BLK_F_CONFIG_WCE 11 /* Writeback mode available in config */ +/* Old (deprecated) name for VIRTIO_BLK_F_FLUSH. */ +#define VIRTIO_BLK_F_WCE VIRTIO_BLK_F_FLUSH +#endif /* !VIRTIO_BLK_NO_LEGACY */ + +#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */ + +struct virtio_blk_config { + /* The capacity (in 512-byte sectors). */ + __u64 capacity; + /* The maximum segment size (if VIRTIO_BLK_F_SIZE_MAX) */ + __u32 size_max; + /* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */ + __u32 seg_max; + /* geometry of the device (if VIRTIO_BLK_F_GEOMETRY) */ + struct virtio_blk_geometry { + __u16 cylinders; + __u8 heads; + __u8 sectors; + } geometry; + + /* block size of device (if VIRTIO_BLK_F_BLK_SIZE) */ + __u32 blk_size; + + /* the next 4 entries are guarded by VIRTIO_BLK_F_TOPOLOGY */ + /* exponent for physical block per logical block. */ + __u8 physical_block_exp; + /* alignment offset in logical blocks. */ + __u8 alignment_offset; + /* minimum I/O size without performance penalty in logical blocks. */ + __u16 min_io_size; + /* optimal sustained I/O size in logical blocks. */ + __u32 opt_io_size; + + /* writeback mode (if VIRTIO_BLK_F_CONFIG_WCE) */ + __u8 wce; + __u8 unused; + + /* number of vqs, only available when VIRTIO_BLK_F_MQ is set */ + __u16 num_queues; + + /* the next 3 entries are guarded by VIRTIO_BLK_F_DISCARD */ + /* + * The maximum discard sectors (in 512-byte sectors) for + * one segment. + */ + __u32 max_discard_sectors; + /* + * The maximum number of discard segments in a + * discard command. + */ + __u32 max_discard_seg; + /* Discard commands must be aligned to this number of sectors. */ + __u32 discard_sector_alignment; + + /* the next 3 entries are guarded by VIRTIO_BLK_F_WRITE_ZEROES */ + /* + * The maximum number of write zeroes sectors (in 512-byte sectors) in + * one segment. + */ + __u32 max_write_zeroes_sectors; + /* + * The maximum number of segments in a write zeroes + * command. + */ + __u32 max_write_zeroes_seg; + /* + * Set if a VIRTIO_BLK_T_WRITE_ZEROES request may result in the + * deallocation of one or more of the sectors. + */ + __u8 write_zeroes_may_unmap; + + __u8 unused1[3]; +} __attribute__((packed)); + +/* + * Command types + * + * Usage is a bit tricky as some bits are used as flags and some are not. + * + * Rules: + * VIRTIO_BLK_T_OUT may be combined with VIRTIO_BLK_T_SCSI_CMD or + * VIRTIO_BLK_T_BARRIER. VIRTIO_BLK_T_FLUSH is a command of its own + * and may not be combined with any of the other flags. + */ + +/* These two define direction. */ +#define VIRTIO_BLK_T_IN 0 +#define VIRTIO_BLK_T_OUT 1 + +#ifndef VIRTIO_BLK_NO_LEGACY +/* This bit says it's a scsi command, not an actual read or write. */ +#define VIRTIO_BLK_T_SCSI_CMD 2 +#endif /* VIRTIO_BLK_NO_LEGACY */ + +/* Cache flush command */ +#define VIRTIO_BLK_T_FLUSH 4 + +/* Get device ID command */ +#define VIRTIO_BLK_T_GET_ID 8 + +/* Discard command */ +#define VIRTIO_BLK_T_DISCARD 11 + +/* Write zeroes command */ +#define VIRTIO_BLK_T_WRITE_ZEROES 13 + +#ifndef VIRTIO_BLK_NO_LEGACY +/* Barrier before this op. */ +#define VIRTIO_BLK_T_BARRIER 0x80000000 +#endif /* !VIRTIO_BLK_NO_LEGACY */ + +/* + * This comes first in the read scatter-gather list. + * For legacy virtio, if VIRTIO_F_ANY_LAYOUT is not negotiated, + * this is the first element of the read scatter-gather list. + */ +struct virtio_blk_outhdr { + /* VIRTIO_BLK_T* */ + __virtio32 type; + /* io priority. */ + __virtio32 ioprio; + /* Sector (ie. 512 byte offset) */ + __virtio64 sector; +}; + +/* Unmap this range (only valid for write zeroes command) */ +#define VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP 0x00000001 + +/* Discard/write zeroes range for each request. */ +struct virtio_blk_discard_write_zeroes { + /* discard/write zeroes start sector */ + __le64 sector; + /* number of discard/write zeroes sectors */ + __le32 num_sectors; + /* flags for this range */ + __le32 flags; +}; + +#ifndef VIRTIO_BLK_NO_LEGACY +struct virtio_scsi_inhdr { + __virtio32 errors; + __virtio32 data_len; + __virtio32 sense_len; + __virtio32 residual; +}; +#endif /* !VIRTIO_BLK_NO_LEGACY */ + +/* And this is the final byte of the write scatter-gather list. */ +#define VIRTIO_BLK_S_OK 0 +#define VIRTIO_BLK_S_IOERR 1 +#define VIRTIO_BLK_S_UNSUPP 2 +#endif /* _LINUX_VIRTIO_BLK_H */ |