[LU-9849] setting an empty trusted.dmv xattr on a regular file causes other xattrs to disappear

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.10.0, Lustre 2.12.7
• Assignee: WC Triage
• Reporter: John Hammond

Description

m:lustre# getfattr --dump --match=- f0
# file: f0
lustre.lov=0s0AvRCwEAAAABAAAAAAAAAAIEAAACAAAAAAAQAAEAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAA=
trusted.link=0s3/HqEQEAAAAsAAAAAAAAAAAAAAAAAAAAABQAAAACAAAABwAAAAEAAAAAZjA=
trusted.lma=0sAAAAAAAAAAACBAAAAgAAAAEAAAAAAAAA
trusted.lov=0s0AvRCwEAAAABAAAAAAAAAAIEAAACAAAAAAAQAAEAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAA=

m:lustre# setfattr --name=trusted.dmv f0
m:lustre# getfattr --dump --match=- f0
getfattr: f0: No such attribute
m:lustre# getfattr --name=trusted.link f0
f0: trusted.link: No such attribute
m:lustre# getfattr --name=trusted.lma f0
f0: trusted.lma: No such attribute
m:lustre# getfattr --name=trusted.lov f0
# file: f0
trusted.lov=0s0AvRCwEAAAABAAAAAAAAAAIEAAACAAAAAAAQAAEAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAA=

m:lustre# setfattr --name=security.foo --value=foo f0
m:lustre# getfattr --dump --match=- f0
getfattr: f0: No such attribute
m:lustre# getfattr --name=security.foo f0
f0: security.foo: No such attribute
m:lustre# setfattr --remove=trusted.dmv f0
m:lustre# getfattr --dump --match=- f0
# file: f0
lustre.lov=0s0AvRCwEAAAABAAAAAAAAAAIEAAACAAAAAAAQAAEAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAA=
security.foo="foo"
trusted.link=0s3/HqEQEAAAAsAAAAAAAAAAAAAAAAAAAAABQAAAACAAAABwAAAAEAAAAAZjA=
trusted.lma=0sAAAAAAAAAAACBAAAAgAAAAEAAAAAAAAA
trusted.lov=0s0AvRCwEAAAABAAAAAAAAAAIEAAACAAAAAAAQAAEAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAA=