1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define FILE_DB_HASHSIZE 8192
18
19 struct files_db_s {
20 char *filename;
21 int fileno;
22 struct files_db_s *next;
23 size_t size;
24 int global_filename_ix;
25 };
26
27 /* Lifted from Wikipedia Jenkins Hash function page */
28 static inline u_int32_t
jenkins_one_at_a_time_hash(char * key,size_t len)29 jenkins_one_at_a_time_hash(char *key, size_t len)
30 {
31 u_int32_t hash, i;
32
33 for(hash = i = 0; i < len; ++i) {
34 hash += key[i];
35 hash += (hash << 10);
36 hash ^= (hash >> 6);
37 }
38 hash += (hash << 3);
39 hash ^= (hash >> 11);
40 hash += (hash << 15);
41 return hash;
42 }
43
44 static inline void
files_db_update_size(void * node,u_int64_t new_size)45 files_db_update_size(void *node, u_int64_t new_size)
46 {
47 struct files_db_s *db_node = (struct files_db_s *)node;
48
49 if (db_node->size < new_size)
50 db_node->size = new_size;
51 }
52
53 static inline void
files_db_add_to_size(void * node,u_int64_t size_incr)54 files_db_add_to_size(void *node, u_int64_t size_incr)
55 {
56 ((struct files_db_s *)node)->size += size_incr;
57 }
58
59 static inline int
files_db_get_fileno(void * node)60 files_db_get_fileno(void *node)
61 {
62 return (((struct files_db_s *)node)->fileno);
63 }
64
65 static inline char *
files_db_get_filename(void * node)66 files_db_get_filename(void *node)
67 {
68 return (((struct files_db_s *)node)->filename);
69 }
70
71 void *files_db_create_handle(void);
72 void files_db_write_objects(FILE *fp);
73 void *files_db_add(char *filename);
74 void *files_db_lookup(char *filename);
75 int files_db_get_total_obj(void);
76 void init_filename_cache(void);
77 void store_filename_cache(void);
78
79 int ioshark_write_header(FILE *fp, struct ioshark_header *header);
80 int ioshark_write_file_state(FILE *fp, struct ioshark_file_state *state);
81 int ioshark_write_file_op(FILE *fp, struct ioshark_file_operation *file_op);
82