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
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <api/fs/fs.h>
|
|
#include "header.h"
|
|
|
|
#define MIDR "/regs/identification/midr_el1"
|
|
#define MIDR_SIZE 19
|
|
#define MIDR_REVISION_MASK 0xf
|
|
#define MIDR_VARIANT_SHIFT 20
|
|
#define MIDR_VARIANT_MASK (0xf << MIDR_VARIANT_SHIFT)
|
|
|
|
char *get_cpuid_str(struct perf_pmu *pmu)
|
|
{
|
|
char *buf = NULL;
|
|
char path[PATH_MAX];
|
|
const char *sysfs = sysfs__mountpoint();
|
|
int cpu;
|
|
u64 midr = 0;
|
|
struct cpu_map *cpus;
|
|
FILE *file;
|
|
|
|
if (!sysfs || !pmu || !pmu->cpus)
|
|
return NULL;
|
|
|
|
buf = malloc(MIDR_SIZE);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
/* read midr from list of cpus mapped to this pmu */
|
|
cpus = cpu_map__get(pmu->cpus);
|
|
for (cpu = 0; cpu < cpus->nr; cpu++) {
|
|
scnprintf(path, PATH_MAX, "%s/devices/system/cpu/cpu%d"MIDR,
|
|
sysfs, cpus->map[cpu]);
|
|
|
|
file = fopen(path, "r");
|
|
if (!file) {
|
|
pr_debug("fopen failed for file %s\n", path);
|
|
continue;
|
|
}
|
|
|
|
if (!fgets(buf, MIDR_SIZE, file)) {
|
|
fclose(file);
|
|
continue;
|
|
}
|
|
fclose(file);
|
|
|
|
/* Ignore/clear Variant[23:20] and
|
|
* Revision[3:0] of MIDR
|
|
*/
|
|
midr = strtoul(buf, NULL, 16);
|
|
midr &= (~(MIDR_VARIANT_MASK | MIDR_REVISION_MASK));
|
|
scnprintf(buf, MIDR_SIZE, "0x%016lx", midr);
|
|
/* got midr break loop */
|
|
break;
|
|
}
|
|
|
|
if (!midr) {
|
|
pr_err("failed to get cpuid string for PMU %s\n", pmu->name);
|
|
free(buf);
|
|
buf = NULL;
|
|
}
|
|
|
|
cpu_map__put(cpus);
|
|
return buf;
|
|
}
|