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
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_STRFILTER_H
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#define __PERF_STRFILTER_H
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/* General purpose glob matching filter */
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#include <linux/list.h>
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#include <stdbool.h>
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/* A node of string filter */
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struct strfilter_node {
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struct strfilter_node *l; /* Tree left branche (for &,|) */
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struct strfilter_node *r; /* Tree right branche (for !,&,|) */
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const char *p; /* Operator or rule */
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};
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/* String filter */
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struct strfilter {
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struct strfilter_node *root;
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};
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/**
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* strfilter__new - Create a new string filter
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* @rules: Filter rule, which is a combination of glob expressions.
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* @err: Pointer which points an error detected on @rules
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*
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* Parse @rules and return new strfilter. Return NULL if an error detected.
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* In that case, *@err will indicate where it is detected, and *@err is NULL
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* if a memory allocation is failed.
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*/
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struct strfilter *strfilter__new(const char *rules, const char **err);
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/**
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* strfilter__or - Append an additional rule by logical-or
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* @filter: Original string filter
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* @rules: Filter rule to be appended at left of the root of
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* @filter by using logical-or.
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* @err: Pointer which points an error detected on @rules
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*
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* Parse @rules and join it to the @filter by using logical-or.
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* Return 0 if success, or return the error code.
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*/
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int strfilter__or(struct strfilter *filter,
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const char *rules, const char **err);
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/**
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* strfilter__add - Append an additional rule by logical-and
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* @filter: Original string filter
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* @rules: Filter rule to be appended at left of the root of
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* @filter by using logical-and.
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* @err: Pointer which points an error detected on @rules
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*
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* Parse @rules and join it to the @filter by using logical-and.
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* Return 0 if success, or return the error code.
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*/
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int strfilter__and(struct strfilter *filter,
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const char *rules, const char **err);
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/**
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* strfilter__compare - compare given string and a string filter
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* @filter: String filter
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* @str: target string
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*
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* Compare @str and @filter. Return true if the str match the rule
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*/
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bool strfilter__compare(struct strfilter *filter, const char *str);
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/**
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* strfilter__delete - delete a string filter
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* @filter: String filter to delete
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*
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* Delete @filter.
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*/
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void strfilter__delete(struct strfilter *filter);
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/**
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* strfilter__string - Reconstruct a rule string from filter
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* @filter: String filter to reconstruct
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*
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* Reconstruct a rule string from @filter. This will be good for
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* debug messages. Note that returning string must be freed afterward.
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*/
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char *strfilter__string(struct strfilter *filter);
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#endif
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