*参照元 [#v12adc3a] #backlinks *説明 [#cf4eab36] -パス: [[linux-2.6.25/include/scsi/scsi_cmnd.h]] -FIXME: これは何? --説明 **参考 [#f200bf3d] *実装 [#y6fbb4ba] struct scsi_cmnd { struct scsi_device *device; - --[[linux-2.6.25/scsi_device]] struct list_head list; /* scsi_cmnd participates in queue lists */ struct list_head eh_entry; /* entry for the host eh_cmd_q */ int eh_eflags; /* Used by error handlr */ - --[[linux-2.6.25/list_head]] /* * A SCSI Command is assigned a nonzero serial_number before passed * to the driver's queue command function. The serial_number is * cleared when scsi_done is entered indicating that the command * has been completed. It is a bug for LLDDs to use this number * for purposes other than printk (and even that is only useful * for debugging). */ unsigned long serial_number; /* * This is set to jiffies as it was when the command was first * allocated. It is used to time how long the command has * been outstanding */ unsigned long jiffies_at_alloc; int retries; int allowed; int timeout_per_command; unsigned char cmd_len; enum dma_data_direction sc_data_direction; - --[[linux-2.6.25/dma_data_direction]] /* These elements define the operation we are about to perform */ #define MAX_COMMAND_SIZE 16 unsigned char cmnd[MAX_COMMAND_SIZE]; struct timer_list eh_timeout; /* Used to time out the command. */ - --[[linux-2.6.25/timer_list]] /* These elements define the operation we ultimately want to perform */ struct scsi_data_buffer sdb; - --[[linux-2.6.25/scsi_data_buffer]] unsigned underflow; /* Return error if less than this amount is transferred */ unsigned transfersize; /* How much we are guaranteed to transfer with each SCSI transfer (ie, between disconnect / reconnects. Probably == sector size */ struct request *request; /* The command we are working on */ - --[[linux-2.6.25/request]] #define SCSI_SENSE_BUFFERSIZE 96 unsigned char *sense_buffer; /* obtained by REQUEST SENSE when * CHECK CONDITION is received on original * command (auto-sense) */ /* Low-level done function - can be used by low-level driver to point * to completion function. Not used by mid/upper level code. */ void (*scsi_done) (struct scsi_cmnd *); /* * The following fields can be written to by the host specific code. * Everything else should be left alone. */ struct scsi_pointer SCp; /* Scratchpad used by some host adapters */ - --[[linux-2.6.25/scsi_pointer]] unsigned char *host_scribble; /* The host adapter is allowed to * call scsi_malloc and get some memory * and hang it here. The host adapter * is also expected to call scsi_free * to release this memory. (The memory * obtained by scsi_malloc is guaranteed * to be at an address < 16Mb). */ int result; /* Status code from lower level driver */ unsigned char tag; /* SCSI-II queued command tag */ }; *コメント [#r830dc17] #comment