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rbd: cleanup inconsistent state in reserveSnap() after a failure

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`reserveSnap()` can potentially fail halfway through, in that case it
needs to undo the snapshot reservation and restore modified attributes
of the snapshot.

Fixes: #4945
Signed-off-by: Niels de Vos <ndevos@ibm.com>
This commit is contained in:
Niels de Vos 2024-11-06 14:04:55 +01:00 committed by mergify[bot]
parent cea8bf8110
commit f3d40f9e5a
1 changed files with 23 additions and 0 deletions
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23
internal/rbd/rbd_journal.go
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@ -388,6 +388,18 @@ func (ri *rbdImage) repairImageID(ctx context.Context, j *journal.Connection, fo
func reserveSnap(ctx context.Context, rbdSnap *rbdSnapshot, rbdVol *rbdVolume, cr *util.Credentials) error { func reserveSnap(ctx context.Context, rbdSnap *rbdSnapshot, rbdVol *rbdVolume, cr *util.Credentials) error {
var err error var err error
// restore original values in case of an error
origReservedID := rbdSnap.ReservedID
origRbdSnapName := rbdSnap.RbdSnapName
origVolID := rbdSnap.VolID
defer func() {
if err != nil {
rbdSnap.ReservedID = origReservedID
rbdSnap.RbdSnapName = origRbdSnapName
rbdSnap.VolID = origVolID
}
}()
journalPoolID, imagePoolID, err := util.GetPoolIDs(ctx, rbdSnap.Monitors, rbdSnap.JournalPool, rbdSnap.Pool, cr) journalPoolID, imagePoolID, err := util.GetPoolIDs(ctx, rbdSnap.Monitors, rbdSnap.JournalPool, rbdSnap.Pool, cr)
if err != nil { if err != nil {
return err return err
@ -405,6 +417,17 @@ func reserveSnap(ctx context.Context, rbdSnap *rbdSnapshot, rbdVol *rbdVolume, c
ctx, rbdSnap.JournalPool, journalPoolID, rbdSnap.Pool, imagePoolID, ctx, rbdSnap.JournalPool, journalPoolID, rbdSnap.Pool, imagePoolID,
rbdSnap.RequestName, rbdSnap.NamePrefix, rbdVol.RbdImageName, kmsID, rbdSnap.ReservedID, rbdVol.Owner, rbdSnap.RequestName, rbdSnap.NamePrefix, rbdVol.RbdImageName, kmsID, rbdSnap.ReservedID, rbdVol.Owner,
"", encryptionType) "", encryptionType)
defer func() {
// only undo the reservation when an error occurred
if err == nil {
return
}
undoErr := undoSnapReservation(ctx, rbdSnap, cr)
if undoErr != nil {
log.WarningLog(ctx, "failed undoing reservation of snapshot %q: %v", rbdSnap, undoErr)
}
}()
if err != nil { if err != nil {
return err return err
} }