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scsi: add multipath support to qemu-pr-helper

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Proper support of persistent reservation for multipath devices requires
communication with the multipath daemon, so that the reservation is
registered and applied when a path comes up.  The device mapper
utilities provide a library to do so; this patch makes qemu-pr-helper.c
detect multipath devices and, when one is found, delegate the operation
to libmpathpersist.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-08-22 06:50:55 +02:00
parent b855f8d175
commit fe8fc5ae5c
6 changed files with 433 additions and 3 deletions
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4
include/scsi/utils.h
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@ -72,10 +72,14 @@ extern const struct SCSISense sense_code_IO_ERROR;
extern const struct SCSISense sense_code_I_T_NEXUS_LOSS;
/* Command aborted, Logical Unit failure */
extern const struct SCSISense sense_code_LUN_FAILURE;
/* Command aborted, LUN Communication failure */
extern const struct SCSISense sense_code_LUN_COMM_FAILURE;
/* Command aborted, Overlapped Commands Attempted */
extern const struct SCSISense sense_code_OVERLAPPED_COMMANDS;
/* LUN not ready, Capacity data has changed */
extern const struct SCSISense sense_code_CAPACITY_CHANGED;
/* Unit attention, SCSI bus reset */
extern const struct SCSISense sense_code_SCSI_BUS_RESET;
/* LUN not ready, Medium not present */
extern const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM;
/* Unit attention, Power on, reset or bus device reset occurred */