+/* BlockJob State Transition Table */
+bool BlockJobSTT[BLOCK_JOB_STATUS__MAX][BLOCK_JOB_STATUS__MAX] = {
+ /* U, C, R, P, Y, S, W, D, X, E, N */
+ /* U: */ [BLOCK_JOB_STATUS_UNDEFINED] = {0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0},
+ /* C: */ [BLOCK_JOB_STATUS_CREATED] = {0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1},
+ /* R: */ [BLOCK_JOB_STATUS_RUNNING] = {0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0},
+ /* P: */ [BLOCK_JOB_STATUS_PAUSED] = {0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
+ /* Y: */ [BLOCK_JOB_STATUS_READY] = {0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0},
+ /* S: */ [BLOCK_JOB_STATUS_STANDBY] = {0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0},
+ /* W: */ [BLOCK_JOB_STATUS_WAITING] = {0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0},
+ /* D: */ [BLOCK_JOB_STATUS_PENDING] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0},
+ /* X: */ [BLOCK_JOB_STATUS_ABORTING] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0},
+ /* E: */ [BLOCK_JOB_STATUS_CONCLUDED] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
+ /* N: */ [BLOCK_JOB_STATUS_NULL] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
+};
+
+bool BlockJobVerbTable[BLOCK_JOB_VERB__MAX][BLOCK_JOB_STATUS__MAX] = {
+ /* U, C, R, P, Y, S, W, D, X, E, N */
+ [BLOCK_JOB_VERB_CANCEL] = {0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0},
+ [BLOCK_JOB_VERB_PAUSE] = {0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0},
+ [BLOCK_JOB_VERB_RESUME] = {0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0},
+ [BLOCK_JOB_VERB_SET_SPEED] = {0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0},
+ [BLOCK_JOB_VERB_COMPLETE] = {0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0},
+ [BLOCK_JOB_VERB_FINALIZE] = {0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0},
+ [BLOCK_JOB_VERB_DISMISS] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0},
+};
+
+static void block_job_state_transition(BlockJob *job, BlockJobStatus s1)
+{
+ BlockJobStatus s0 = job->status;
+ assert(s1 >= 0 && s1 <= BLOCK_JOB_STATUS__MAX);
+ trace_block_job_state_transition(job, job->ret, BlockJobSTT[s0][s1] ?
+ "allowed" : "disallowed",
+ BlockJobStatus_str(s0),
+ BlockJobStatus_str(s1));
+ assert(BlockJobSTT[s0][s1]);
+ job->status = s1;
+}
+
+static int block_job_apply_verb(BlockJob *job, BlockJobVerb bv, Error **errp)
+{
+ assert(bv >= 0 && bv <= BLOCK_JOB_VERB__MAX);
+ trace_block_job_apply_verb(job, BlockJobStatus_str(job->status),
+ BlockJobVerb_str(bv),
+ BlockJobVerbTable[bv][job->status] ?
+ "allowed" : "prohibited");
+ if (BlockJobVerbTable[bv][job->status]) {
+ return 0;
+ }
+ error_setg(errp, "Job '%s' in state '%s' cannot accept command verb '%s'",
+ job->id, BlockJobStatus_str(job->status), BlockJobVerb_str(bv));
+ return -EPERM;
+}
+