mirror of
https://github.com/xen-project/xen.git
synced 2026-10-29 10:40:03 +01:00
Ian Campbell
debddaa56c
The xenstore header xs.h is producing conflicts with other software[1]. xs is a too short identifier and does not matche the library. Renaming the headers to xenstore.h and xenstore_lib.h is the easiest way to make them easy recognizable and prevent furthe problems. [1]: http://bugs.debian.org/668550 [ Also update QEMU_TAG, to bring in corresponding change to qemu-xen-traditional. -iwj ] Signed-off-by: Bastian Blank <waldi@debian.org> Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com> --HG-- rename : tools/xenstore/xs.h => tools/xenstore/xenstore.h rename : tools/xenstore/xs_lib.h => tools/xenstore/xenstore_lib.h
241 lines
6.6 KiB
C
241 lines
6.6 KiB
C
/* blktaplib.h
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*
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* Blktap library userspace code.
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*
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* (c) 2005 Andrew Warfield and Julian Chesterfield
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation; or, when distributed
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* separately from the Linux kernel or incorporated into other
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* software packages, subject to the following license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this source file (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef __BLKTAPLIB_H__
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#define __BLKTAPLIB_H__
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#include <xenctrl.h>
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#include <sys/param.h>
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#include <sys/user.h>
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#include <xen/xen.h>
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#include <xen/io/blkif.h>
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#include <xen/io/ring.h>
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#include <xenstore.h>
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#include <sys/types.h>
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#include <unistd.h>
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#define BLK_RING_SIZE __CONST_RING_SIZE(blkif, XC_PAGE_SIZE)
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/* size of the extra VMA area to map in attached pages. */
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#define BLKTAP_VMA_PAGES BLK_RING_SIZE
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/* blktap IOCTLs: These must correspond with the blktap driver ioctls*/
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#define BLKTAP_IOCTL_KICK_FE 1
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#define BLKTAP_IOCTL_KICK_BE 2
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#define BLKTAP_IOCTL_SETMODE 3
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#define BLKTAP_IOCTL_SENDPID 4
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#define BLKTAP_IOCTL_NEWINTF 5
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#define BLKTAP_IOCTL_MINOR 6
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#define BLKTAP_IOCTL_MAJOR 7
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#define BLKTAP_QUERY_ALLOC_REQS 8
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#define BLKTAP_IOCTL_FREEINTF 9
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#define BLKTAP_IOCTL_NEWINTF_EXT 50
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#define BLKTAP_IOCTL_PRINT_IDXS 100
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/* blktap switching modes: (Set with BLKTAP_IOCTL_SETMODE) */
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#define BLKTAP_MODE_PASSTHROUGH 0x00000000 /* default */
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#define BLKTAP_MODE_INTERCEPT_FE 0x00000001
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#define BLKTAP_MODE_INTERCEPT_BE 0x00000002
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#define BLKTAP_MODE_INTERPOSE \
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(BLKTAP_MODE_INTERCEPT_FE | BLKTAP_MODE_INTERCEPT_BE)
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static inline int BLKTAP_MODE_VALID(unsigned long arg)
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{
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return (
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( arg == BLKTAP_MODE_PASSTHROUGH ) ||
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( arg == BLKTAP_MODE_INTERCEPT_FE ) ||
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( arg == BLKTAP_MODE_INTERPOSE ) );
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}
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#define MAX_REQUESTS BLK_RING_SIZE
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#define BLKTAP_IOCTL_KICK 1
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#define MAX_PENDING_REQS BLK_RING_SIZE
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#define BLKTAP_DEV_DIR "/dev/xen"
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#define BLKTAP_DEV_NAME "blktap"
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#define BLKTAP_DEV_MINOR 0
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#define BLKTAP_CTRL_DIR "/var/run/tap"
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extern int blktap_major;
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#define BLKTAP_RING_PAGES 1 /* Front */
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#define BLKTAP_MMAP_REGION_SIZE (BLKTAP_RING_PAGES + MMAP_PAGES)
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struct blkif;
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typedef struct {
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blkif_request_t req;
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struct blkif *blkif;
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int submitting;
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int secs_pending;
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int16_t status;
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} pending_req_t;
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struct blkif_ops {
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unsigned long long (*get_size)(struct blkif *blkif);
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unsigned long (*get_secsize)(struct blkif *blkif);
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unsigned int (*get_info)(struct blkif *blkif);
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};
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typedef struct blkif {
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domid_t domid;
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long int handle;
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long int pdev;
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long int readonly;
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enum { DISCONNECTED, DISCONNECTING, CONNECTED } state;
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struct blkif_ops *ops;
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struct blkif *hash_next;
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void *prv; /* device-specific data */
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void *info; /*Image parameter passing */
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pending_req_t pending_list[MAX_REQUESTS];
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int devnum;
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int fds[2];
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int be_id;
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int major;
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int minor;
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pid_t tappid;
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int drivertype;
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uint16_t cookie;
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} blkif_t;
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typedef struct blkif_info {
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char *params;
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} blkif_info_t;
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void register_new_devmap_hook(int (*fn)(blkif_t *blkif));
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void register_new_unmap_hook(int (*fn)(blkif_t *blkif));
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void register_new_blkif_hook(int (*fn)(blkif_t *blkif));
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blkif_t *blkif_find_by_handle(domid_t domid, unsigned int handle);
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blkif_t *alloc_blkif(domid_t domid);
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int blkif_init(blkif_t *blkif, long int handle, long int pdev,
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long int readonly);
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void free_blkif(blkif_t *blkif);
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void __init_blkif(void);
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typedef struct busy_state {
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int seg_idx;
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blkif_request_t *req;
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} busy_state_t;
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typedef struct tapdev_info {
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int fd;
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char *mem;
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blkif_sring_t *sring;
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blkif_back_ring_t fe_ring;
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unsigned long vstart;
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blkif_t *blkif;
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busy_state_t busy;
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} tapdev_info_t;
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typedef struct domid_translate {
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unsigned short domid;
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unsigned short busid;
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} domid_translate_t ;
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typedef struct domid_translate_ext {
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unsigned short domid;
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uint32_t busid;
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} domid_translate_ext_t ;
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typedef struct image {
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unsigned long long size;
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unsigned long secsize;
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unsigned int info;
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} image_t;
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/* 16-byte message header, immediately followed by message payload. */
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typedef struct msg_hdr {
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uint16_t type;
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uint16_t len;
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uint16_t drivertype;
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uint16_t cookie;
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uint8_t readonly;
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uint8_t pad[7];
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} msg_hdr_t;
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typedef struct msg_newdev {
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uint8_t devnum;
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uint16_t domid;
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} msg_newdev_t;
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typedef struct msg_pid {
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pid_t pid;
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} msg_pid_t;
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#define READ 0
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#define WRITE 1
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/*Control Messages between manager and tapdev*/
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#define CTLMSG_PARAMS 1
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#define CTLMSG_IMG 2
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#define CTLMSG_IMG_FAIL 3
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#define CTLMSG_NEWDEV 4
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#define CTLMSG_NEWDEV_RSP 5
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#define CTLMSG_NEWDEV_FAIL 6
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#define CTLMSG_CLOSE 7
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#define CTLMSG_CLOSE_RSP 8
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#define CTLMSG_PID 9
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#define CTLMSG_PID_RSP 10
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/* disk driver types */
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#define MAX_DISK_TYPES 20
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#define DISK_TYPE_AIO 0
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#define DISK_TYPE_SYNC 1
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#define DISK_TYPE_VMDK 2
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#define DISK_TYPE_RAM 3
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#define DISK_TYPE_QCOW 4
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#define DISK_TYPE_QCOW2 5
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/* xenstore/xenbus: */
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#define DOMNAME "Domain-0"
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int setup_probe_watch(struct xs_handle *h);
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/* Abitrary values, must match the underlying driver... */
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#define MAX_TAP_DEV 100
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/* Accessing attached data page mappings */
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#define MMAP_PAGES \
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(MAX_PENDING_REQS * BLKIF_MAX_SEGMENTS_PER_REQUEST)
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#define MMAP_VADDR(_vstart,_req,_seg) \
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((_vstart) + \
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((_req) * BLKIF_MAX_SEGMENTS_PER_REQUEST * getpagesize()) + \
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((_seg) * getpagesize()))
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#endif /* __BLKTAPLIB_H__ */
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