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Description of problem:
According to manpage listing snapshots with --sys on type SNAPSHOTS should be allowed:
list
       List information on LSM objects

       --sys <SYS_ID> Optional.   Search resources from system with SYS_ID. Only supported when querying these types of resources: VOLUMES, POOLS, FS, SNAPSHOTS, DISKS, ACCESS_GROUPS, TARGET_PORTS, BATTERIES.

But it is not:
# lsmcli -u sim:// list --type snapshots --sys sim-01
lsmcli: error: --fs <file system id> required

# lsmcli -u sim:// list --type snapshots --sys sim-01 --fs FS_ID_00001
lsmcli: error: Search key specified more than once (system_id, fs_id)


Version-Release number of selected component (if applicable):
libstoragemgmt-1.7.2-1.el7.x86_64


How reproducible:
100%


Steps to Reproduce:
1.lsmcli -u sim:// list --type snapshots --sys sim-01 --fs FS_ID_00001


Actual results:
lsmcli: error: Search key specified more than once (system_id, fs_id)


Expected results:
snapshots listed only for specified system

Additional info:

Man page update, text from upstream commit

  When a user lists snapshots it is required that they supply a
  filesystem.  A filesystem is specific to a given system, thus
  allowing the user to constrain the search to a specific system
  with --sys <sys_id> is redundant.

libstoragemgmt-1.7.3-2.el7.x86_64

   list
       List information on LSM objects
                                                                                                                                                                                        , BATTERIES.
       --sys <SYS_ID> Optional.  Search resources from system with SYS_ID. Only supported when querying these types of resources: VOLUMES, POOLS, FS, DISKS, ACCESS_GROUPS, TARGET_PORTS

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2019:2064