mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
7dfdc9a52b
scsi_send_eh_cmnd currently uses a semaphore and an overload of eh_timer to either get a completion for a command for a timeout. Switch to using a completion and wait_for_completion_timeout to simply the code and not having to deal with the races ourselves. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
140 lines
4.5 KiB
C
140 lines
4.5 KiB
C
#ifndef _SCSI_PRIV_H
|
|
#define _SCSI_PRIV_H
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/device.h>
|
|
|
|
struct request_queue;
|
|
struct scsi_cmnd;
|
|
struct scsi_device;
|
|
struct scsi_host_template;
|
|
struct scsi_request;
|
|
struct Scsi_Host;
|
|
|
|
|
|
/*
|
|
* Magic values for certain scsi structs. Shouldn't ever be used.
|
|
*/
|
|
#define SCSI_CMND_MAGIC 0xE25C23A5
|
|
#define SCSI_REQ_MAGIC 0x75F6D354
|
|
|
|
/*
|
|
* Scsi Error Handler Flags
|
|
*/
|
|
#define SCSI_EH_CANCEL_CMD 0x0001 /* Cancel this cmd */
|
|
|
|
#define SCSI_SENSE_VALID(scmd) \
|
|
(((scmd)->sense_buffer[0] & 0x70) == 0x70)
|
|
|
|
/*
|
|
* Special value for scanning to specify scanning or rescanning of all
|
|
* possible channels, (target) ids, or luns on a given shost.
|
|
*/
|
|
#define SCAN_WILD_CARD ~0
|
|
|
|
/* hosts.c */
|
|
extern int scsi_init_hosts(void);
|
|
extern void scsi_exit_hosts(void);
|
|
|
|
/* scsi.c */
|
|
extern int scsi_dispatch_cmd(struct scsi_cmnd *cmd);
|
|
extern int scsi_setup_command_freelist(struct Scsi_Host *shost);
|
|
extern void scsi_destroy_command_freelist(struct Scsi_Host *shost);
|
|
extern int scsi_insert_special_req(struct scsi_request *sreq, int);
|
|
extern void scsi_init_cmd_from_req(struct scsi_cmnd *cmd,
|
|
struct scsi_request *sreq);
|
|
extern void __scsi_release_request(struct scsi_request *sreq);
|
|
extern void __scsi_done(struct scsi_cmnd *cmd);
|
|
#ifdef CONFIG_SCSI_LOGGING
|
|
void scsi_log_send(struct scsi_cmnd *cmd);
|
|
void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
|
|
#else
|
|
static inline void scsi_log_send(struct scsi_cmnd *cmd)
|
|
{ };
|
|
static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
|
|
{ };
|
|
#endif
|
|
|
|
/* scsi_devinfo.c */
|
|
extern int scsi_get_device_flags(struct scsi_device *sdev,
|
|
unsigned char *vendor, unsigned char *model);
|
|
extern int __init scsi_init_devinfo(void);
|
|
extern void scsi_exit_devinfo(void);
|
|
|
|
/* scsi_error.c */
|
|
extern void scsi_add_timer(struct scsi_cmnd *, int,
|
|
void (*)(struct scsi_cmnd *));
|
|
extern int scsi_delete_timer(struct scsi_cmnd *);
|
|
extern void scsi_times_out(struct scsi_cmnd *cmd);
|
|
extern int scsi_error_handler(void *host);
|
|
extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
|
|
extern void scsi_eh_wakeup(struct Scsi_Host *shost);
|
|
extern int scsi_eh_scmd_add(struct scsi_cmnd *, int);
|
|
|
|
/* scsi_lib.c */
|
|
extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
|
|
extern void scsi_setup_cmd_retry(struct scsi_cmnd *cmd);
|
|
extern void scsi_device_unbusy(struct scsi_device *sdev);
|
|
extern int scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
|
|
extern void scsi_next_command(struct scsi_cmnd *cmd);
|
|
extern void scsi_run_host_queues(struct Scsi_Host *shost);
|
|
extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev);
|
|
extern void scsi_free_queue(struct request_queue *q);
|
|
extern int scsi_init_queue(void);
|
|
extern void scsi_exit_queue(void);
|
|
|
|
/* scsi_proc.c */
|
|
#ifdef CONFIG_SCSI_PROC_FS
|
|
extern void scsi_proc_hostdir_add(struct scsi_host_template *);
|
|
extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
|
|
extern void scsi_proc_host_add(struct Scsi_Host *);
|
|
extern void scsi_proc_host_rm(struct Scsi_Host *);
|
|
extern int scsi_init_procfs(void);
|
|
extern void scsi_exit_procfs(void);
|
|
#else
|
|
# define scsi_proc_hostdir_add(sht) do { } while (0)
|
|
# define scsi_proc_hostdir_rm(sht) do { } while (0)
|
|
# define scsi_proc_host_add(shost) do { } while (0)
|
|
# define scsi_proc_host_rm(shost) do { } while (0)
|
|
# define scsi_init_procfs() (0)
|
|
# define scsi_exit_procfs() do { } while (0)
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
/* scsi_scan.c */
|
|
extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
|
|
unsigned int, unsigned int, int);
|
|
extern void scsi_forget_host(struct Scsi_Host *);
|
|
extern void scsi_rescan_device(struct device *);
|
|
|
|
/* scsi_sysctl.c */
|
|
#ifdef CONFIG_SYSCTL
|
|
extern int scsi_init_sysctl(void);
|
|
extern void scsi_exit_sysctl(void);
|
|
#else
|
|
# define scsi_init_sysctl() (0)
|
|
# define scsi_exit_sysctl() do { } while (0)
|
|
#endif /* CONFIG_SYSCTL */
|
|
|
|
/* scsi_sysfs.c */
|
|
extern int scsi_sysfs_add_sdev(struct scsi_device *);
|
|
extern int scsi_sysfs_add_host(struct Scsi_Host *);
|
|
extern int scsi_sysfs_register(void);
|
|
extern void scsi_sysfs_unregister(void);
|
|
extern void scsi_sysfs_device_initialize(struct scsi_device *);
|
|
extern int scsi_sysfs_target_initialize(struct scsi_device *);
|
|
extern struct scsi_transport_template blank_transport_template;
|
|
extern void __scsi_remove_device(struct scsi_device *);
|
|
|
|
extern struct bus_type scsi_bus_type;
|
|
|
|
/*
|
|
* internal scsi timeout functions: for use by mid-layer and transport
|
|
* classes.
|
|
*/
|
|
|
|
#define SCSI_DEVICE_BLOCK_MAX_TIMEOUT (HZ*60)
|
|
extern int scsi_internal_device_block(struct scsi_device *sdev);
|
|
extern int scsi_internal_device_unblock(struct scsi_device *sdev);
|
|
|
|
#endif /* _SCSI_PRIV_H */
|