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
101 lines
3 KiB
C
101 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Glibc independent futex library for testing kernel functionality.
|
|
* Shamelessly stolen from Darren Hart <dvhltc@us.ibm.com>
|
|
* http://git.kernel.org/cgit/linux/kernel/git/dvhart/futextest.git/
|
|
*/
|
|
|
|
#ifndef _FUTEX_H
|
|
#define _FUTEX_H
|
|
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/types.h>
|
|
#include <linux/futex.h>
|
|
|
|
/**
|
|
* futex() - SYS_futex syscall wrapper
|
|
* @uaddr: address of first futex
|
|
* @op: futex op code
|
|
* @val: typically expected value of uaddr, but varies by op
|
|
* @timeout: typically an absolute struct timespec (except where noted
|
|
* otherwise). Overloaded by some ops
|
|
* @uaddr2: address of second futex for some ops\
|
|
* @val3: varies by op
|
|
* @opflags: flags to be bitwise OR'd with op, such as FUTEX_PRIVATE_FLAG
|
|
*
|
|
* futex() is used by all the following futex op wrappers. It can also be
|
|
* used for misuse and abuse testing. Generally, the specific op wrappers
|
|
* should be used instead. It is a macro instead of an static inline function as
|
|
* some of the types over overloaded (timeout is used for nr_requeue for
|
|
* example).
|
|
*
|
|
* These argument descriptions are the defaults for all
|
|
* like-named arguments in the following wrappers except where noted below.
|
|
*/
|
|
#define futex(uaddr, op, val, timeout, uaddr2, val3, opflags) \
|
|
syscall(SYS_futex, uaddr, op | opflags, val, timeout, uaddr2, val3)
|
|
|
|
/**
|
|
* futex_wait() - block on uaddr with optional timeout
|
|
* @timeout: relative timeout
|
|
*/
|
|
static inline int
|
|
futex_wait(u_int32_t *uaddr, u_int32_t val, struct timespec *timeout, int opflags)
|
|
{
|
|
return futex(uaddr, FUTEX_WAIT, val, timeout, NULL, 0, opflags);
|
|
}
|
|
|
|
/**
|
|
* futex_wake() - wake one or more tasks blocked on uaddr
|
|
* @nr_wake: wake up to this many tasks
|
|
*/
|
|
static inline int
|
|
futex_wake(u_int32_t *uaddr, int nr_wake, int opflags)
|
|
{
|
|
return futex(uaddr, FUTEX_WAKE, nr_wake, NULL, NULL, 0, opflags);
|
|
}
|
|
|
|
/**
|
|
* futex_lock_pi() - block on uaddr as a PI mutex
|
|
*/
|
|
static inline int
|
|
futex_lock_pi(u_int32_t *uaddr, struct timespec *timeout, int opflags)
|
|
{
|
|
return futex(uaddr, FUTEX_LOCK_PI, 0, timeout, NULL, 0, opflags);
|
|
}
|
|
|
|
/**
|
|
* futex_unlock_pi() - release uaddr as a PI mutex, waking the top waiter
|
|
*/
|
|
static inline int
|
|
futex_unlock_pi(u_int32_t *uaddr, int opflags)
|
|
{
|
|
return futex(uaddr, FUTEX_UNLOCK_PI, 0, NULL, NULL, 0, opflags);
|
|
}
|
|
|
|
/**
|
|
* futex_cmp_requeue() - requeue tasks from uaddr to uaddr2
|
|
* @nr_wake: wake up to this many tasks
|
|
* @nr_requeue: requeue up to this many tasks
|
|
*/
|
|
static inline int
|
|
futex_cmp_requeue(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2, int nr_wake,
|
|
int nr_requeue, int opflags)
|
|
{
|
|
return futex(uaddr, FUTEX_CMP_REQUEUE, nr_wake, nr_requeue, uaddr2,
|
|
val, opflags);
|
|
}
|
|
|
|
#ifndef HAVE_PTHREAD_ATTR_SETAFFINITY_NP
|
|
#include <pthread.h>
|
|
#include <linux/compiler.h>
|
|
static inline int pthread_attr_setaffinity_np(pthread_attr_t *attr __maybe_unused,
|
|
size_t cpusetsize __maybe_unused,
|
|
cpu_set_t *cpuset __maybe_unused)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#endif /* _FUTEX_H */
|