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
87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _PERF_TARGET_H
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#define _PERF_TARGET_H
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#include <stdbool.h>
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#include <sys/types.h>
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struct target {
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const char *pid;
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const char *tid;
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const char *cpu_list;
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const char *uid_str;
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uid_t uid;
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bool system_wide;
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bool uses_mmap;
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bool default_per_cpu;
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bool per_thread;
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};
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enum target_errno {
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TARGET_ERRNO__SUCCESS = 0,
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/*
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* Choose an arbitrary negative big number not to clash with standard
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* errno since SUS requires the errno has distinct positive values.
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* See 'Issue 6' in the link below.
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*
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* http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
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*/
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__TARGET_ERRNO__START = -10000,
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/* for target__validate() */
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TARGET_ERRNO__PID_OVERRIDE_CPU = __TARGET_ERRNO__START,
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TARGET_ERRNO__PID_OVERRIDE_UID,
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TARGET_ERRNO__UID_OVERRIDE_CPU,
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TARGET_ERRNO__PID_OVERRIDE_SYSTEM,
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TARGET_ERRNO__UID_OVERRIDE_SYSTEM,
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TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD,
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/* for target__parse_uid() */
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TARGET_ERRNO__INVALID_UID,
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TARGET_ERRNO__USER_NOT_FOUND,
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__TARGET_ERRNO__END,
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};
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enum target_errno target__validate(struct target *target);
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enum target_errno target__parse_uid(struct target *target);
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int target__strerror(struct target *target, int errnum, char *buf, size_t buflen);
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static inline bool target__has_task(struct target *target)
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{
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return target->tid || target->pid || target->uid_str;
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}
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static inline bool target__has_cpu(struct target *target)
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{
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return target->system_wide || target->cpu_list;
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}
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static inline bool target__none(struct target *target)
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{
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return !target__has_task(target) && !target__has_cpu(target);
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}
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static inline bool target__has_per_thread(struct target *target)
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{
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return target->system_wide && target->per_thread;
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}
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static inline bool target__uses_dummy_map(struct target *target)
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{
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bool use_dummy = false;
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if (target->default_per_cpu)
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use_dummy = target->per_thread ? true : false;
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else if (target__has_task(target) ||
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(!target__has_cpu(target) && !target->uses_mmap))
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use_dummy = true;
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else if (target__has_per_thread(target))
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use_dummy = true;
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return use_dummy;
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}
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#endif /* _PERF_TARGET_H */
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