16c00db4bb
Pull AFS fixes from David Howells:
"Here's a set of patches that fix a number of bugs in the in-kernel AFS
client, including:
- Fix directory locking to not use individual page locks for
directory reading/scanning but rather to use a semaphore on the
afs_vnode struct as the directory contents must be read in a single
blob and data from different reads must not be mixed as the entire
contents may be shuffled about between reads.
- Fix address list parsing to handle port specifiers correctly.
- Only give up callback records on a server if we actually talked to
that server (we might not be able to access a server).
- Fix some callback handling bugs, including refcounting,
whole-volume callbacks and when callbacks actually get broken in
response to a CB.CallBack op.
- Fix some server/address rotation bugs, including giving up if we
can't probe a server; giving up if a server says it doesn't have a
volume, but there are more servers to try.
- Fix the decoding of fetched statuses to be OpenAFS compatible.
- Fix the handling of server lookups in Cache Manager ops (such as
CB.InitCallBackState3) to use a UUID if possible and to handle no
server being found.
- Fix a bug in server lookup where not all addresses are compared.
- Fix the non-encryption of calls that prevents some servers from
being accessed (this also requires an AF_RXRPC patch that has
already gone in through the net tree).
There's also a patch that adds tracepoints to log Cache Manager ops
that don't find a matching server, either by UUID or by address"
* tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Fix the non-encryption of calls
afs: Fix CB.CallBack handling
afs: Fix whole-volume callback handling
afs: Fix afs_find_server search loop
afs: Fix the handling of an unfound server in CM operations
afs: Add a tracepoint to record callbacks from unlisted servers
afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID
afs: Fix VNOVOL handling in address rotation
afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility
afs: Fix server rotation's handling of fileserver probe failure
afs: Fix refcounting in callback registration
afs: Fix giving up callbacks on server destruction
afs: Fix address list parsing
afs: Fix directory page locking
107 lines
2.8 KiB
Perl
107 lines
2.8 KiB
Perl
#!/usr/bin/perl -w
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# (c) 2009, Tom Zanussi <tzanussi@gmail.com>
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# Licensed under the terms of the GNU GPL License version 2
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# Display r/w activity for files read/written to for a given program
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# The common_* event handler fields are the most useful fields common to
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# all events. They don't necessarily correspond to the 'common_*' fields
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# in the status files. Those fields not available as handler params can
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# be retrieved via script functions of the form get_common_*().
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use 5.010000;
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use strict;
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use warnings;
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use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/Perf-Trace-Util/lib";
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use lib "./Perf-Trace-Util/lib";
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use Perf::Trace::Core;
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use Perf::Trace::Util;
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my $usage = "perf script -s rw-by-file.pl <comm>\n";
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my $for_comm = shift or die $usage;
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my %reads;
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my %writes;
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sub syscalls::sys_enter_read
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{
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my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
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$common_pid, $common_comm, $nr, $fd, $buf, $count) = @_;
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if ($common_comm eq $for_comm) {
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$reads{$fd}{bytes_requested} += $count;
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$reads{$fd}{total_reads}++;
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}
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}
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sub syscalls::sys_enter_write
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{
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my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
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$common_pid, $common_comm, $nr, $fd, $buf, $count) = @_;
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if ($common_comm eq $for_comm) {
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$writes{$fd}{bytes_written} += $count;
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$writes{$fd}{total_writes}++;
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}
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}
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sub trace_end
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{
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printf("file read counts for $for_comm:\n\n");
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printf("%6s %10s %10s\n", "fd", "# reads", "bytes_requested");
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printf("%6s %10s %10s\n", "------", "----------", "-----------");
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foreach my $fd (sort {$reads{$b}{bytes_requested} <=>
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$reads{$a}{bytes_requested}} keys %reads) {
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my $total_reads = $reads{$fd}{total_reads};
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my $bytes_requested = $reads{$fd}{bytes_requested};
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printf("%6u %10u %10u\n", $fd, $total_reads, $bytes_requested);
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}
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printf("\nfile write counts for $for_comm:\n\n");
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printf("%6s %10s %10s\n", "fd", "# writes", "bytes_written");
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printf("%6s %10s %10s\n", "------", "----------", "-----------");
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foreach my $fd (sort {$writes{$b}{bytes_written} <=>
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$writes{$a}{bytes_written}} keys %writes) {
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my $total_writes = $writes{$fd}{total_writes};
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my $bytes_written = $writes{$fd}{bytes_written};
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printf("%6u %10u %10u\n", $fd, $total_writes, $bytes_written);
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}
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print_unhandled();
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}
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my %unhandled;
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sub print_unhandled
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{
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if ((scalar keys %unhandled) == 0) {
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return;
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}
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print "\nunhandled events:\n\n";
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printf("%-40s %10s\n", "event", "count");
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printf("%-40s %10s\n", "----------------------------------------",
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"-----------");
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foreach my $event_name (keys %unhandled) {
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printf("%-40s %10d\n", $event_name, $unhandled{$event_name});
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}
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}
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sub trace_unhandled
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{
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my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
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$common_pid, $common_comm) = @_;
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$unhandled{$event_name}++;
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}
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