perf-eh_elf/trace/beauty/ioctl.c
Linus Torvalds 16c00db4bb Merge tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
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
2018-05-15 10:48:36 -07:00

163 lines
6.4 KiB
C

/*
* trace/beauty/ioctl.c
*
* Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
*
* Released under the GPL v2. (and only v2, not any later version)
*/
#include "trace/beauty/beauty.h"
#include <linux/kernel.h>
/*
* FIXME: to support all arches we have to improve this, for
* now, to build on older systems without things like TIOCGEXCL,
* get it directly from our copy.
*
* Right now only x86 is being supported for beautifying ioctl args
* in 'perf trace', see tools/perf/trace/beauty/Build and builtin-trace.c
*/
#include <uapi/asm-generic/ioctls.h>
static size_t ioctl__scnprintf_tty_cmd(int nr, int dir, char *bf, size_t size)
{
static const char *ioctl_tty_cmd[] = {
"TCGETS", "TCSETS", "TCSETSW", "TCSETSF", "TCGETA", "TCSETA", "TCSETAW",
"TCSETAF", "TCSBRK", "TCXONC", "TCFLSH", "TIOCEXCL", "TIOCNXCL", "TIOCSCTTY",
"TIOCGPGRP", "TIOCSPGRP", "TIOCOUTQ", "TIOCSTI", "TIOCGWINSZ", "TIOCSWINSZ",
"TIOCMGET", "TIOCMBIS", "TIOCMBIC", "TIOCMSET", "TIOCGSOFTCAR", "TIOCSSOFTCAR",
"FIONREAD", "TIOCLINUX", "TIOCCONS", "TIOCGSERIAL", "TIOCSSERIAL", "TIOCPKT",
"FIONBIO", "TIOCNOTTY", "TIOCSETD", "TIOCGETD", "TCSBRKP",
[_IOC_NR(TIOCSBRK)] = "TIOCSBRK", "TIOCCBRK", "TIOCGSID", "TCGETS2", "TCSETS2",
"TCSETSW2", "TCSETSF2", "TIOCGRS48", "TIOCSRS485", "TIOCGPTN", "TIOCSPTLCK",
"TIOCGDEV", "TCSETX", "TCSETXF", "TCSETXW", "TIOCSIG", "TIOCVHANGUP", "TIOCGPKT",
"TIOCGPTLCK", [_IOC_NR(TIOCGEXCL)] = "TIOCGEXCL", "TIOCGPTPEER",
[_IOC_NR(FIONCLEX)] = "FIONCLEX", "FIOCLEX", "FIOASYNC", "TIOCSERCONFIG",
"TIOCSERGWILD", "TIOCSERSWILD", "TIOCGLCKTRMIOS", "TIOCSLCKTRMIOS",
"TIOCSERGSTRUCT", "TIOCSERGETLSR", "TIOCSERGETMULTI", "TIOCSERSETMULTI",
"TIOCMIWAIT", "TIOCGICOUNT", };
static DEFINE_STRARRAY(ioctl_tty_cmd);
if (nr < strarray__ioctl_tty_cmd.nr_entries && strarray__ioctl_tty_cmd.entries[nr] != NULL)
return scnprintf(bf, size, "%s", strarray__ioctl_tty_cmd.entries[nr]);
return scnprintf(bf, size, "(%#x, %#x, %#x)", 'T', nr, dir);
}
static size_t ioctl__scnprintf_drm_cmd(int nr, int dir, char *bf, size_t size)
{
#include "trace/beauty/generated/ioctl/drm_ioctl_array.c"
static DEFINE_STRARRAY(drm_ioctl_cmds);
if (nr < strarray__drm_ioctl_cmds.nr_entries && strarray__drm_ioctl_cmds.entries[nr] != NULL)
return scnprintf(bf, size, "DRM_%s", strarray__drm_ioctl_cmds.entries[nr]);
return scnprintf(bf, size, "(%#x, %#x, %#x)", 'd', nr, dir);
}
static size_t ioctl__scnprintf_sndrv_pcm_cmd(int nr, int dir, char *bf, size_t size)
{
#include "trace/beauty/generated/ioctl/sndrv_pcm_ioctl_array.c"
static DEFINE_STRARRAY(sndrv_pcm_ioctl_cmds);
if (nr < strarray__sndrv_pcm_ioctl_cmds.nr_entries && strarray__sndrv_pcm_ioctl_cmds.entries[nr] != NULL)
return scnprintf(bf, size, "SNDRV_PCM_%s", strarray__sndrv_pcm_ioctl_cmds.entries[nr]);
return scnprintf(bf, size, "(%#x, %#x, %#x)", 'A', nr, dir);
}
static size_t ioctl__scnprintf_sndrv_ctl_cmd(int nr, int dir, char *bf, size_t size)
{
#include "trace/beauty/generated/ioctl/sndrv_ctl_ioctl_array.c"
static DEFINE_STRARRAY(sndrv_ctl_ioctl_cmds);
if (nr < strarray__sndrv_ctl_ioctl_cmds.nr_entries && strarray__sndrv_ctl_ioctl_cmds.entries[nr] != NULL)
return scnprintf(bf, size, "SNDRV_CTL_%s", strarray__sndrv_ctl_ioctl_cmds.entries[nr]);
return scnprintf(bf, size, "(%#x, %#x, %#x)", 'U', nr, dir);
}
static size_t ioctl__scnprintf_kvm_cmd(int nr, int dir, char *bf, size_t size)
{
#include "trace/beauty/generated/ioctl/kvm_ioctl_array.c"
static DEFINE_STRARRAY(kvm_ioctl_cmds);
if (nr < strarray__kvm_ioctl_cmds.nr_entries && strarray__kvm_ioctl_cmds.entries[nr] != NULL)
return scnprintf(bf, size, "KVM_%s", strarray__kvm_ioctl_cmds.entries[nr]);
return scnprintf(bf, size, "(%#x, %#x, %#x)", 0xAE, nr, dir);
}
static size_t ioctl__scnprintf_vhost_virtio_cmd(int nr, int dir, char *bf, size_t size)
{
#include "trace/beauty/generated/ioctl/vhost_virtio_ioctl_array.c"
static DEFINE_STRARRAY(vhost_virtio_ioctl_cmds);
static DEFINE_STRARRAY(vhost_virtio_ioctl_read_cmds);
struct strarray *s = (dir & _IOC_READ) ? &strarray__vhost_virtio_ioctl_read_cmds : &strarray__vhost_virtio_ioctl_cmds;
if (nr < s->nr_entries && s->entries[nr] != NULL)
return scnprintf(bf, size, "VHOST_%s", s->entries[nr]);
return scnprintf(bf, size, "(%#x, %#x, %#x)", 0xAF, nr, dir);
}
static size_t ioctl__scnprintf_perf_cmd(int nr, int dir, char *bf, size_t size)
{
#include "trace/beauty/generated/ioctl/perf_ioctl_array.c"
static DEFINE_STRARRAY(perf_ioctl_cmds);
if (nr < strarray__perf_ioctl_cmds.nr_entries && strarray__perf_ioctl_cmds.entries[nr] != NULL)
return scnprintf(bf, size, "PERF_%s", strarray__perf_ioctl_cmds.entries[nr]);
return scnprintf(bf, size, "(%#x, %#x, %#x)", 0xAE, nr, dir);
}
static size_t ioctl__scnprintf_cmd(unsigned long cmd, char *bf, size_t size)
{
int dir = _IOC_DIR(cmd),
type = _IOC_TYPE(cmd),
nr = _IOC_NR(cmd),
sz = _IOC_SIZE(cmd);
int printed = 0;
static const struct ioctl_type {
int type;
size_t (*scnprintf)(int nr, int dir, char *bf, size_t size);
} ioctl_types[] = { /* Must be ordered by type */
{ .type = '$', .scnprintf = ioctl__scnprintf_perf_cmd, },
['A' - '$'] = { .type = 'A', .scnprintf = ioctl__scnprintf_sndrv_pcm_cmd, },
['T' - '$'] = { .type = 'T', .scnprintf = ioctl__scnprintf_tty_cmd, },
['U' - '$'] = { .type = 'U', .scnprintf = ioctl__scnprintf_sndrv_ctl_cmd, },
['d' - '$'] = { .type = 'd', .scnprintf = ioctl__scnprintf_drm_cmd, },
[0xAE - '$'] = { .type = 0xAE, .scnprintf = ioctl__scnprintf_kvm_cmd, },
[0xAF - '$'] = { .type = 0xAF, .scnprintf = ioctl__scnprintf_vhost_virtio_cmd, },
};
const int nr_types = ARRAY_SIZE(ioctl_types);
if (type >= ioctl_types[0].type && type <= ioctl_types[nr_types - 1].type) {
const int index = type - ioctl_types[0].type;
if (ioctl_types[index].scnprintf != NULL)
return ioctl_types[index].scnprintf(nr, dir, bf, size);
}
printed += scnprintf(bf + printed, size - printed, "%c", '(');
if (dir == _IOC_NONE) {
printed += scnprintf(bf + printed, size - printed, "%s", "NONE");
} else {
if (dir & _IOC_READ)
printed += scnprintf(bf + printed, size - printed, "%s", "READ");
if (dir & _IOC_WRITE)
printed += scnprintf(bf + printed, size - printed, "%s%s", dir & _IOC_READ ? "|" : "", "WRITE");
}
return printed + scnprintf(bf + printed, size - printed, ", %#x, %#x, %#x)", type, nr, sz);
}
size_t syscall_arg__scnprintf_ioctl_cmd(char *bf, size_t size, struct syscall_arg *arg)
{
unsigned long cmd = arg->val;
return ioctl__scnprintf_cmd(cmd, bf, size);
}