[Scst-devel] about the "SCST_TGT_DEV_RESETTED"

[wwhistory <wwh...@gm...>]

hi,

In the function "scst_alloc_add_tgt_dev"(scst_lib.c), we set the &tgt_dev->tgt_dev_flags to SCST_TGT_DEV_RESETTED, as follows:

 __set_bit(SCST_TGT_DEV_RESETTED, &tgt_dev->tgt_dev_flags);

In the function "scst_pre_exec"(scst_targ.c), we see:

 if (unlikely(test_bit(SCST_TGT_DEV_RESETTED, &tgt_dev->tgt_dev_flags))
     && scst_is_ua_command(cmd)) 
 {
  struct scst_device *dev = cmd->dev;
  int done = 0;
  spin_lock_bh(&dev->dev_lock);
  if (test_bit(SCST_TGT_DEV_RESETTED, &tgt_dev->tgt_dev_flags)) {
   printk("SCST_TGT_DEV_RESETTED set\n");
   clear_bit(SCST_TGT_DEV_RESETTED,
      &tgt_dev->tgt_dev_flags);
   scst_set_cmd_error(cmd,
       SCST_LOAD_SENSE(scst_sense_reset_UA));
   cmd->ua_ignore = 1;
   clear_bit(SCST_CMD_ABORTED, &cmd->cmd_flags);
   clear_bit(SCST_CMD_NO_RESP, &cmd->cmd_flags);
   done = 1;
  }
  spin_unlock_bh(&dev->dev_lock);

  if (done) {
   res = SCST_EXEC_COMPLETED;
   /* Report the result */
   scst_cmd_done_local(cmd, SCST_CMD_STATE_DEFAULT);
   goto out;
  }
 }


Here I found the first commad except of INQUIRY, REQUEST_SENSE and REPORT_LUNS will satisfy the if condition, and then scst_set_cmd_error. Then the next command is REQUEST_SENSE. I don't know why we set the &tgt_dev->tgt_dev_flags to SCST_TGT_DEV_RESETTED in the function "scst_alloc_add_tgt_dev"(scst_lib.c). Can somebody help  me?




wwhistory
2006-09-07