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
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/*
|
|
* call-path.h: Manipulate a tree data structure containing function call paths
|
|
* Copyright (c) 2014, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
*/
|
|
|
|
#ifndef __PERF_CALL_PATH_H
|
|
#define __PERF_CALL_PATH_H
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/rbtree.h>
|
|
|
|
/**
|
|
* struct call_path - node in list of calls leading to a function call.
|
|
* @parent: call path to the parent function call
|
|
* @sym: symbol of function called
|
|
* @ip: only if sym is null, the ip of the function
|
|
* @db_id: id used for db-export
|
|
* @in_kernel: whether function is a in the kernel
|
|
* @rb_node: node in parent's tree of called functions
|
|
* @children: tree of call paths of functions called
|
|
*
|
|
* In combination with the call_return structure, the call_path structure
|
|
* defines a context-sensitve call-graph.
|
|
*/
|
|
struct call_path {
|
|
struct call_path *parent;
|
|
struct symbol *sym;
|
|
u64 ip;
|
|
u64 db_id;
|
|
bool in_kernel;
|
|
struct rb_node rb_node;
|
|
struct rb_root children;
|
|
};
|
|
|
|
#define CALL_PATH_BLOCK_SHIFT 8
|
|
#define CALL_PATH_BLOCK_SIZE (1 << CALL_PATH_BLOCK_SHIFT)
|
|
#define CALL_PATH_BLOCK_MASK (CALL_PATH_BLOCK_SIZE - 1)
|
|
|
|
struct call_path_block {
|
|
struct call_path cp[CALL_PATH_BLOCK_SIZE];
|
|
struct list_head node;
|
|
};
|
|
|
|
/**
|
|
* struct call_path_root - root of all call paths.
|
|
* @call_path: root call path
|
|
* @blocks: list of blocks to store call paths
|
|
* @next: next free space
|
|
* @sz: number of spaces
|
|
*/
|
|
struct call_path_root {
|
|
struct call_path call_path;
|
|
struct list_head blocks;
|
|
size_t next;
|
|
size_t sz;
|
|
};
|
|
|
|
struct call_path_root *call_path_root__new(void);
|
|
void call_path_root__free(struct call_path_root *cpr);
|
|
|
|
struct call_path *call_path__findnew(struct call_path_root *cpr,
|
|
struct call_path *parent,
|
|
struct symbol *sym, u64 ip, u64 ks);
|
|
|
|
#endif
|