commit 36666f7e52642af3f804e6f0b32cc1dabc92c132
Author: Oswald Buddenhagen <o...@users.sf.net>
Date: Sun Apr 2 14:04:43 2017 +0200
rewrite tracking of highest expired UID
so far, we tracked the slave side, and calculated the master side on the
fly. that complicated things unnecessarily.
src/run-tests.pl | 14 +++---
src/sync.c | 125 ++++++++++++++++++++++-------------------------
2 files changed, 66 insertions(+), 73 deletions(-)
diff --git a/src/run-tests.pl b/src/run-tests.pl
index 8ecc9f2..14e1a8d 100755
--- a/src/run-tests.pl
+++ b/src/run-tests.pl
@@ -195,7 +195,7 @@ my @X31 = (
1, 1, "F", 2, 2, "", 3, 3, "S", 4, 4, "", 5, 5, "S", 6, 6, "" ],
[ 5,
1, 1, "F", 2, 2, "", 4, 3, "", 5, 4, "S", 6, 5, "" ],
- [ 6, 2, 0,
+ [ 6, 3, 0,
1, 1, "F", 2, 2, "", 4, 3, "", 5, 4, "S", 6, 5, "" ],
);
test("max messages", \@x30, \@X31, @O31);
@@ -207,7 +207,7 @@ my @X32 = (
1, 1, "F", 2, 2, "", 3, 3, "S", 4, 4, "", 5, 5, "S", 6, 6, "" ],
[ 4,
1, 1, "F", 4, 2, "", 5, 3, "S", 6, 4, "" ],
- [ 6, 1, 0,
+ [ 6, 3, 0,
1, 1, "F", 4, 2, "", 5, 3, "S", 6, 4, "" ],
);
test("max messages vs. unread", \@x30, \@X32, @O32);
@@ -367,7 +367,7 @@ sub showbox($)
# $filename
# Output:
-# [ maxuid[M], smaxxuid, maxuid[S],
+# [ maxuid[M], mmaxxuid, maxuid[S],
# uid[M], uid[S], "flags", ... ],
sub showstate($)
{
@@ -396,7 +396,7 @@ sub showstate($)
return;
}
my @T = ($hdr{'MaxPulledUid'} // "missing",
- $hdr{'MaxExpiredSlaveUid'} // "0",
+ $hdr{'MaxExpiredMasterUid'} // "0",
$hdr{'MaxPushedUid'} // "missing");
for (@ls) {
/^(-?\d+) (-?\d+) (.*)$/;
@@ -472,7 +472,7 @@ sub mkchan($$@)
open(FILE, ">", "slave/.mbsyncstate") or
die "Cannot create sync state.\n";
print FILE "MasterUidValidity 1\nMaxPulledUid ".shift(@t)."\n".
- "SlaveUidValidity 1\nMaxExpiredSlaveUid
".shift(@t)."\nMaxPushedUid ".shift(@t)."\n\n";
+ "SlaveUidValidity 1\nMaxExpiredMasterUid
".shift(@t)."\nMaxPushedUid ".shift(@t)."\n\n";
while (@t) {
print FILE shift(@t)." ".shift(@t)." ".shift(@t)."\n";
}
@@ -515,13 +515,13 @@ sub ckbox($$$@)
# $filename, @syncstate
sub ckstate($@)
{
- my ($fn, $mmaxuid, $smaxxuid, $smaxuid, @T) = @_;
+ my ($fn, $mmaxuid, $mmaxxuid, $smaxuid, @T) = @_;
my %hdr;
$hdr{'MasterUidValidity'} = "1";
$hdr{'SlaveUidValidity'} = "1";
$hdr{'MaxPulledUid'} = $mmaxuid;
$hdr{'MaxPushedUid'} = $smaxuid;
- $hdr{'MaxExpiredSlaveUid'} = $smaxxuid if ($smaxxuid ne 0);
+ $hdr{'MaxExpiredMasterUid'} = $mmaxxuid if ($mmaxxuid ne 0);
open(FILE, "<", $fn) or die "Cannot read sync state $fn.\n";
chomp(my @ls = <FILE>);
close FILE;
diff --git a/src/sync.c b/src/sync.c
index 78f30e9..8ebbac8 100644
--- a/src/sync.c
+++ b/src/sync.c
@@ -159,8 +159,7 @@ typedef struct {
int newmaxuid[2]; /* highest UID that is currently being propagated */
int uidval[2]; /* UID validity value */
int newuid[2]; /* TUID lookup makes sense only for UIDs >= this */
- int mmaxxuid; /* highest expired UID on master during new message
propagation */
- int smaxxuid; /* highest expired UID on slave */
+ int mmaxxuid; /* highest expired UID on master */
} sync_vars_t;
static void sync_ref( sync_vars_t *svars ) { ++svars->ref_count; }
@@ -649,8 +648,8 @@ save_state( sync_vars_t *svars )
Fprintf( svars->nfp,
"MasterUidValidity %d\nSlaveUidValidity %d\nMaxPulledUid
%d\nMaxPushedUid %d\n",
svars->uidval[M], svars->uidval[S], svars->maxuid[M],
svars->maxuid[S] );
- if (svars->smaxxuid)
- Fprintf( svars->nfp, "MaxExpiredSlaveUid %d\n", svars->smaxxuid
);
+ if (svars->mmaxxuid)
+ Fprintf( svars->nfp, "MaxExpiredMasterUid %d\n",
svars->mmaxxuid );
Fprintf( svars->nfp, "\n" );
for (srec = svars->srecs; srec; srec = srec->next) {
if (srec->status & S_DEAD)
@@ -678,6 +677,7 @@ load_state( sync_vars_t *svars )
char *s;
FILE *jfp;
int line, t, t1, t2, t3;
+ int smaxxuid = 0;
char c;
struct stat st;
char fbuf[16]; /* enlarge when support for keywords is added */
@@ -701,7 +701,7 @@ load_state( sync_vars_t *svars )
if (line == 1 && isdigit( buf[0] )) {
if (sscanf( buf, "%63s %63s", buf1, buf2 ) != 2
||
sscanf( buf1, "%d:%d", &svars->uidval[M],
&svars->maxuid[M] ) < 2 ||
- sscanf( buf2, "%d:%d:%d",
&svars->uidval[S], &svars->smaxxuid, &svars->maxuid[S] ) < 3) {
+ sscanf( buf2, "%d:%d:%d",
&svars->uidval[S], &smaxxuid, &svars->maxuid[S] ) < 3) {
error( "Error: invalid sync state
header in %s\n", svars->dname );
goto jbail;
}
@@ -719,8 +719,10 @@ load_state( sync_vars_t *svars )
svars->maxuid[M] = t1;
else if (!strcmp( buf1, "MaxPushedUid" ))
svars->maxuid[S] = t1;
- else if (!strcmp( buf1, "MaxExpiredSlaveUid" ))
- svars->smaxxuid = t1;
+ else if (!strcmp( buf1, "MaxExpiredMasterUid" ))
+ svars->mmaxxuid = t1;
+ else if (!strcmp( buf1, "MaxExpiredSlaveUid" )) //
Legacy
+ smaxxuid = t1;
else {
error( "Error: unrecognized sync state header
entry at %s:%d\n", svars->dname, line );
goto jbail;
@@ -768,9 +770,36 @@ load_state( sync_vars_t *svars )
}
svars->existing = 0;
}
+
+ // This is legacy support for pre-1.3 sync states.
+ if (smaxxuid) {
+ int minwuid = INT_MAX;
+ for (srec = svars->srecs; srec; srec = srec->next) {
+ if ((srec->status & S_DEAD) || srec->uid[M] <= 0)
+ continue;
+ if (srec->status & S_EXPIRED) {
+ if (!srec->uid[S]) {
+ // The expired message was already gone.
+ continue;
+ }
+ // The expired message was not expunged yet, so
re-examine it.
+ // This will happen en masse, so just extend
the bulk fetch.
+ } else {
+ if (srec->uid[S] > 0 && smaxxuid >=
srec->uid[S]) {
+ // The non-expired message is in the
generally expired range,
+ // so don't make it contribute to the
bulk fetch.
+ continue;
+ }
+ // Usual non-expired message.
+ }
+ if (minwuid > srec->uid[M])
+ minwuid = srec->uid[M];
+ }
+ svars->mmaxxuid = minwuid - 1;
+ }
+
svars->newmaxuid[M] = svars->maxuid[M];
svars->newmaxuid[S] = svars->maxuid[S];
- svars->mmaxxuid = INT_MAX;
line = 0;
if ((jfp = fopen( svars->jname, "r" ))) {
if (!lock_state( svars ))
@@ -814,7 +843,7 @@ load_state( sync_vars_t *svars )
else if (c == 'T')
*int_array_append(
&svars->trashed_msgs[t1] ) = t2;
else if (c == '!')
- svars->smaxxuid = t1;
+ svars->mmaxxuid = t1;
else if (c == '|') {
svars->uidval[M] = t1;
svars->uidval[S] = t2;
@@ -897,11 +926,9 @@ load_state( sync_vars_t *svars )
case '/':
t3 = (srec->status & S_EXPIRE);
debug( "expired now %d\n", t3 /
S_EXPIRE );
- if (t3) {
- if (svars->smaxxuid <
srec->uid[S])
- svars->smaxxuid
= srec->uid[S];
+ if (t3)
srec->status |=
S_EXPIRED;
- } else
+ else
srec->status &=
~S_EXPIRED;
break;
default:
@@ -919,6 +946,7 @@ load_state( sync_vars_t *svars )
}
}
svars->replayed = line;
+
return 1;
}
@@ -1238,31 +1266,9 @@ box_opened2( sync_vars_t *svars, int t )
/* When messages have been expired on the slave, the
master fetch is split into
* two ranges: The bulk fetch which corresponds with
the most recent messages, and an
* exception list of messages which would have been
expired if they weren't important. */
- debug( "preparing master selection - max expired slave
uid is %d\n", svars->smaxxuid );
+ debug( "preparing master selection - max expired master
uid is %d\n", svars->mmaxxuid );
/* First, find out the lower bound for the bulk fetch.
*/
- minwuid = INT_MAX;
- for (srec = svars->srecs; srec; srec = srec->next) {
- if ((srec->status & S_DEAD) || srec->uid[M] <=
0)
- continue;
- if (srec->status & S_EXPIRED) {
- if (!srec->uid[S]) {
- /* The expired message was
already gone. */
- continue;
- }
- /* The expired message was not expunged
yet, so re-examine it.
- * This will happen en masse, so just
extend the bulk fetch. */
- } else {
- if (svars->smaxxuid >= srec->uid[S]) {
- /* The non-expired message is
in the generally expired range, so don't
- * make it contribute to the
bulk fetch. */
- continue;
- }
- /* Usual non-expired message. */
- }
- if (minwuid > srec->uid[M])
- minwuid = srec->uid[M];
- }
- debug( " min non-orphaned master uid is %d\n", minwuid
);
+ minwuid = svars->mmaxxuid + 1;
/* Next, calculate the exception fetch. */
for (srec = svars->srecs; srec; srec = srec->next) {
if (srec->status & S_DEAD)
@@ -1665,6 +1671,8 @@ box_loaded( int sts, void *aux )
/* The message is excess or was
already (being) expired. */
srec->status |= S_NEXPIRE;
debug( " old pair(%d,%d)
expired\n", srec->uid[M], srec->uid[S] );
+ if (svars->mmaxxuid <
srec->uid[M])
+ svars->mmaxxuid =
srec->uid[M];
todel--;
}
}
@@ -1721,6 +1729,9 @@ box_loaded( int sts, void *aux )
if (srec->status & S_NEXPIRE) {
jFprintf( svars, "= %d %d\n",
srec->uid[M], srec->uid[S] );
debug( " pair(%d,%d): 1 (abort)\n",
srec->uid[M], srec->uid[S] );
+ // If we have so many new messages that
some of them are instantly expired,
+ // but some are still propagated
because they are important, we need to
+ // ensure explicitly that the bulk
fetch limit is upped.
svars->mmaxxuid = srec->uid[M];
srec->msg[M]->srec = 0;
srec->status = S_DEAD;
@@ -1849,16 +1860,6 @@ msg_copied_p2( sync_vars_t *svars, sync_rec_t *srec, int
t, int uid )
srec->uid[t] = uid;
srec->tuid[0] = 0;
}
- if (t == S && svars->mmaxxuid < srec->uid[M]) {
- /* If we have so many new messages that some of them are
instantly expired,
- * but some are still propagated because they are important, we
need to
- * ensure explicitly that the bulk fetch limit is upped. */
- svars->mmaxxuid = INT_MAX;
- if (svars->smaxxuid < srec->uid[S] - 1) {
- svars->smaxxuid = srec->uid[S] - 1;
- jFprintf( svars, "! %d\n", svars->smaxxuid );
- }
- }
}
static void msgs_found_new( int sts, void *aux );
@@ -1984,8 +1985,6 @@ flags_set_p2( sync_vars_t *svars, sync_rec_t *srec, int t
)
if (t == S) {
uint nex = (srec->status / S_NEXPIRE) & 1;
if (nex != ((srec->status / S_EXPIRED) & 1)) {
- if (nex && (svars->smaxxuid < srec->uid[S]))
- svars->smaxxuid = srec->uid[S];
jFprintf( svars, "/ %d %d\n", srec->uid[M],
srec->uid[S] );
debug( " pair(%d,%d): expired %d (commit)\n",
srec->uid[M], srec->uid[S], nex );
srec->status = (srec->status & ~S_EXPIRED) |
(nex * S_EXPIRED);
@@ -2144,35 +2143,23 @@ static void
box_closed_p2( sync_vars_t *svars, int t )
{
sync_rec_t *srec;
- int minwuid;
svars->state[t] |= ST_CLOSED;
if (!(svars->state[1-t] & ST_CLOSED))
return;
+ // All the journalling done in this function is merely for the autotest
-
+ // the operations are idempotent, and we're about to commit the new
state
+ // right afterwards anyway.
+
if (((svars->state[M] | svars->state[S]) & ST_DID_EXPUNGE) ||
svars->chan->max_messages) {
debug( "purging obsolete entries\n" );
-
- minwuid = INT_MAX;
- if (svars->chan->max_messages) {
- debug( " max expired slave uid is %d\n",
svars->smaxxuid );
- for (srec = svars->srecs; srec; srec = srec->next) {
- if (srec->status & S_DEAD)
- continue;
- if (!((srec->uid[S] <= 0 || ((srec->status &
S_DEL(S)) && (svars->state[S] & ST_DID_EXPUNGE))) &&
- (srec->uid[M] <= 0 || ((srec->status &
S_DEL(M)) && (svars->state[M] & ST_DID_EXPUNGE)) || (srec->status &
S_EXPIRED))) &&
- svars->smaxxuid < srec->uid[S] && minwuid >
srec->uid[M])
- minwuid = srec->uid[M];
- }
- debug( " min non-orphaned master uid is %d\n", minwuid
);
- }
-
for (srec = svars->srecs; srec; srec = srec->next) {
if (srec->status & S_DEAD)
continue;
if (srec->uid[S] <= 0 || ((srec->status & S_DEL(S)) &&
(svars->state[S] & ST_DID_EXPUNGE))) {
if (srec->uid[M] <= 0 || ((srec->status &
S_DEL(M)) && (svars->state[M] & ST_DID_EXPUNGE)) ||
- ((srec->status & S_EXPIRED) &&
svars->maxuid[M] >= srec->uid[M] && minwuid > srec->uid[M])) {
+ ((srec->status & S_EXPIRED) &&
svars->maxuid[M] >= srec->uid[M] && svars->mmaxxuid >= srec->uid[M])) {
debug( " -> killing (%d,%d)\n",
srec->uid[M], srec->uid[S] );
srec->status = S_DEAD;
jFprintf( svars, "- %d %d\n",
srec->uid[M], srec->uid[S] );
@@ -2189,6 +2176,12 @@ box_closed_p2( sync_vars_t *svars, int t )
}
}
+ // This is just an optimization, so it needs no journaling of
intermediate states.
+ // However, doing it before the entry purge would require ensuring that
the
+ // exception list includes all relevant messages.
+ debug( "max expired uid on master is now %d\n", svars->mmaxxuid );
+ jFprintf( svars, "! %d\n", svars->mmaxxuid );
+
save_state( svars );
sync_bail( svars );
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