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
79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PROBE_FILE_H
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#define __PROBE_FILE_H
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#include "probe-event.h"
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struct strlist;
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struct strfilter;
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/* Cache of probe definitions */
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struct probe_cache_entry {
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struct list_head node;
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bool sdt;
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struct perf_probe_event pev;
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char *spev;
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struct strlist *tevlist;
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};
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struct probe_cache {
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int fd;
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struct list_head entries;
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};
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enum probe_type {
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PROBE_TYPE_U = 0,
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PROBE_TYPE_S,
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PROBE_TYPE_X,
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PROBE_TYPE_STRING,
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PROBE_TYPE_BITFIELD,
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PROBE_TYPE_END,
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};
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#define PF_FL_UPROBE 1
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#define PF_FL_RW 2
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#define for_each_probe_cache_entry(entry, pcache) \
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list_for_each_entry(entry, &pcache->entries, node)
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/* probe-file.c depends on libelf */
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#ifdef HAVE_LIBELF_SUPPORT
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int open_trace_file(const char *trace_file, bool readwrite);
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int probe_file__open(int flag);
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int probe_file__open_both(int *kfd, int *ufd, int flag);
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struct strlist *probe_file__get_namelist(int fd);
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struct strlist *probe_file__get_rawlist(int fd);
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int probe_file__add_event(int fd, struct probe_trace_event *tev);
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int probe_file__del_events(int fd, struct strfilter *filter);
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int probe_file__get_events(int fd, struct strfilter *filter,
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struct strlist *plist);
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int probe_file__del_strlist(int fd, struct strlist *namelist);
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int probe_cache_entry__get_event(struct probe_cache_entry *entry,
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struct probe_trace_event **tevs);
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struct probe_cache *probe_cache__new(const char *target, struct nsinfo *nsi);
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int probe_cache__add_entry(struct probe_cache *pcache,
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struct perf_probe_event *pev,
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struct probe_trace_event *tevs, int ntevs);
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int probe_cache__scan_sdt(struct probe_cache *pcache, const char *pathname);
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int probe_cache__commit(struct probe_cache *pcache);
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void probe_cache__purge(struct probe_cache *pcache);
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void probe_cache__delete(struct probe_cache *pcache);
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int probe_cache__filter_purge(struct probe_cache *pcache,
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struct strfilter *filter);
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struct probe_cache_entry *probe_cache__find(struct probe_cache *pcache,
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struct perf_probe_event *pev);
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struct probe_cache_entry *probe_cache__find_by_name(struct probe_cache *pcache,
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const char *group, const char *event);
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int probe_cache__show_all_caches(struct strfilter *filter);
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bool probe_type_is_available(enum probe_type type);
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bool kretprobe_offset_is_supported(void);
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#else /* ! HAVE_LIBELF_SUPPORT */
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static inline struct probe_cache *probe_cache__new(const char *tgt __maybe_unused, struct nsinfo *nsi __maybe_unused)
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{
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return NULL;
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}
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#define probe_cache__delete(pcache) do {} while (0)
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#endif
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#endif
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