The volume server views summed the logical size of the volumes into
DiskUsage while DiskCapacity came from the filesystem statfs size. On a
compressing filesystem the logical sum exceeds the physical capacity, so
the server details popup derived a negative available space and rendered
it as "NaN undefined".
Pair each disk's capacity with the usage measured the same way, using the
statfs numbers the volume server already heartbeats, as CollectTierStats
does. Volume servers without statfs numbers keep the previous slot-based
capacity and logical bytes, and EC shard bytes are only counted there
instead of on top of the filesystem usage.
* admin: support setting volume read-only and read/write modes
* admin: address PR review on volume access-mode persistence
Reject trailing JSON values in the SetVolumeReadOnly handler so
requests like {"read_only":true}{} no longer pass validation, and add
a trailing-value case to the invalid-request test.
Propagate .vif persistence failures through the access-mode chain.
PersistReadOnly now returns the SaveVolumeInfo error and rolls back
the in-memory volumeInfo on failure; Store.MarkVolumeReadonly and
Store.MarkVolumeWritable propagate that error and roll back their
noWrite flags, so the API reports failure instead of success while
restart would revert the mode.
* admin: make .vif persistence atomic and preserve error chain
SaveVolumeInfo now writes to a .vif.tmp file, syncs it, renames it
over the target, and fsyncs the directory. A write/sync/close failure
leaves the existing .vif intact, so the PersistReadOnly in-memory
rollback matches the durable state instead of diverging from a
partially written file that restart would apply.
Switch the error wrappers in PersistReadOnly, MarkVolumeReadonly, and
MarkVolumeWritable from %v to %w so callers can use errors.Is and
errors.As to classify persistence failures.
* admin: treat post-rename dir fsync failure as a warning
After os.Rename commits the new .vif, the on-disk file already holds
the requested mode. A directory fsync failure only risks losing the
rename across a crash; returning an error here would make
PersistReadOnly roll back in-memory state while the durable file keeps
the new mode, splitting the replica. Log the failure as a warning
instead, matching the best-effort nature of FsyncDir (already skipped
on Windows).
* admin: distinguish post-rename durability failures and use unique temp files
SaveVolumeInfo now uses os.CreateTemp for the staging file, preventing
concurrent saves for the same volume from colliding on a shared .tmp
path.
A directory fsync failure after os.Rename returns a
NotCrashDurableError instead of being silently swallowed. The rename
already committed the new metadata to disk, so PersistReadOnly,
MarkVolumeReadonly, and MarkVolumeWritable skip the in-memory rollback
for this error type (keeping state aligned with the durable file) while
still propagating the failure to the API. Pre-commit failures continue
to roll back as before.
* admin: continue post-commit work after NotCrashDurableError
MarkVolumeWritable now clears the EIO quarantine and the gRPC handlers
(makeVolumeReadonly step 3, makeVolumeWritable master notification)
proceed with their post-commit work when SaveVolumeInfo returns a
NotCrashDurableError, instead of aborting and leaving the volume
unavailable or the master unaware of the mode change. The durability
warning is still propagated to the API caller. Pre-commit failures
continue to abort early as before.
* admin: handle NotCrashDurableError in tier and EC callers
VolumeTierMoveDatFromRemote and VolumeEcShardsGenerate now check for
NotCrashDurableError from SaveVolumeInfo. When the rename has already
committed the new .vif, they continue with their post-commit work
(backend switch, remote deletion, keeping generated EC shards) instead
of aborting and leaving the on-disk metadata inconsistent with the
file layout. The durability warning is logged for the operator.
Mohd Quamar Tyagi