1 /*
2  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 
6 /*
7  * BSD 3 Clause License
8  *
9  * Copyright (c) 2007, The Storage Networking Industry Association.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 	- Redistributions of source code must retain the above copyright
15  *	  notice, this list of conditions and the following disclaimer.
16  *
17  * 	- Redistributions in binary form must reproduce the above copyright
18  *	  notice, this list of conditions and the following disclaimer in
19  *	  the documentation and/or other materials provided with the
20  *	  distribution.
21  *
22  *	- Neither the name of The Storage Networking Industry Association (SNIA)
23  *	  nor the names of its contributors may be used to endorse or promote
24  *	  products derived from this software without specific prior written
25  *	  permission.
26  *
27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
28  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
31  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37  * POSSIBILITY OF SUCH DAMAGE.
38  */
39 /*
40  * This defines structures used to pass information between threads
41  * for both local-backup and NDMP.
42  *
43  */
44 
45 #ifndef	_TLM_BUFFERS_H_
46 #define	_TLM_BUFFERS_H_
47 
48 #include <sys/types.h>
49 #include <stdlib.h>
50 #include <limits.h>
51 #include <sys/stat.h>
52 #include <thread.h>
53 #include "tlm.h"
54 
55 #ifndef RECORDSIZE
56 #define	RECORDSIZE	512
57 #endif /* !RECORDSIZE */
58 
59 #define	DOTDOT_DIR	".."
60 #define	IS_DOTDOT(s)	(strcmp(s, DOTDOT_DIR) == 0)
61 #define	SLASH	'/'
62 
63 #define	NDMP_MAX_SELECTIONS	64
64 
65 /*
66  * List of files/directories to be excluded from backup list.
67  */
68 #define	EXCL_PROC	"/proc"
69 #define	EXCL_TMP	"/tmp"
70 
71 
72 typedef struct	tlm_buffer {
73 	char	*tb_buffer_data;	/* area to be used for I/O */
74 	long	tb_buffer_size;	/* number of valid bytes in the buffer */
75 	long	tb_buffer_spot;	/* current location in the I/O buffer */
76 	longlong_t tb_seek_spot;	/* for BACKUP */
77 				/* where in the file this buffer stops. */
78 				/* this is used for the Multi Volume */
79 				/* Header record. */
80 	longlong_t tb_file_size;	/* for BACKUP */
81 					/* how much of the file is left. */
82 	long	tb_full	: 1,
83 		tb_eot	: 1,
84 		tb_eof	: 1;
85 	int	tb_errno;	/* I/O error values */
86 } tlm_buffer_t;
87 
88 
89 /*
90  * Flags for tlm_buffers.
91  */
92 #define	TLM_BUF_IN_READY	0x00000001
93 #define	TLM_BUF_OUT_READY	0x00000002
94 
95 typedef struct	tlm_buffers {
96 	int	tbs_ref;	/* number of threads using this */
97 	short	tbs_buffer_in;	/* buffer to be filled */
98 	short	tbs_buffer_out;	/* buffer to be emptied */
99 				/* these are indexes into tlm_buffers */
100 	mutex_t	tbs_mtx;
101 	cond_t	tbs_in_cv;
102 	cond_t	tbs_out_cv;
103 	uint32_t	tbs_flags;
104 	long	tbs_data_transfer_size;	/* max size of read/write buffer */
105 	longlong_t tbs_offset;
106 	tlm_buffer_t tbs_buffer[TLM_TAPE_BUFFERS];
107 } tlm_buffers_t;
108 
109 typedef struct	tlm_cmd {
110 	int	tc_ref;			/* number of threads using this */
111 	mutex_t	tc_mtx;
112 	cond_t	tc_cv;
113 	uint32_t	tc_flags;
114 	int	tc_reader;		/* writer to reader */
115 	int	tc_writer;		/* reader to writer */
116 	char	tc_file_name[TLM_MAX_PATH_NAME]; /* name of last file */
117 						/* for restore */
118 	tlm_buffers_t *tc_buffers; /* reader-writer speedup buffers */
119 } tlm_cmd_t;
120 
121 typedef struct	tlm_commands {
122 	int	tcs_reader;	/* commands to all readers */
123 	int	tcs_writer;	/* commands to all writers */
124 	int	tcs_reader_count;	/* number of active readers */
125 	int	tcs_writer_count;	/* number of active writers */
126 	int	tcs_error;	/* worker errors */
127 	char	tcs_message[TLM_LINE_SIZE]; /* worker message back to user */
128 	tlm_cmd_t *tcs_command;	/* IPC area between read-write */
129 } tlm_commands_t;
130 
131 
132 typedef struct	tlm_job_stats {
133 	char	js_job_name[TLM_MAX_BACKUP_JOB_NAME];
134 	longlong_t js_bytes_total;	/* tape bytes in or out so far */
135 	longlong_t js_bytes_in_file;	/* remaining data in a file */
136 	longlong_t js_files_so_far;	/* files backed up so far */
137 	longlong_t js_files_total;	/* number of files to be backed up */
138 	int	js_errors;
139 	time_t	js_start_time;		/* start time (GMT time) */
140 	time_t	js_start_ltime;		/* start time (local time) */
141 	time_t	js_stop_time;		/* stop time (local time) */
142 	time_t	js_chkpnt_time;		/* checkpoint creation (GMT time) */
143 	void	*js_callbacks;
144 } tlm_job_stats_t;
145 
146 
147 struct full_dir_info {
148 	fs_fhandle_t fd_dir_fh;
149 	char fd_dir_name[TLM_MAX_PATH_NAME];
150 };
151 
152 /*
153  * For more info please refer to
154  * "Functional Specification Document: Usgin new LBR engine in NDMP",
155  * Revision: 0.2
156  * Document No.: 101438.
157  * the "File history of backup" section
158  */
159 typedef struct lbr_fhlog_call_backs {
160 	void *fh_cookie;
161 	int (*fh_logpname)();
162 	int (*fh_log_dir)();
163 	int (*fh_log_node)();
164 } lbr_fhlog_call_backs_t;
165 
166 
167 typedef struct bk_selector {
168 	void *bs_cookie;
169 	int bs_level;
170 	int bs_ldate;
171 	boolean_t (*bs_fn)(struct bk_selector *bks, struct stat64 *s);
172 } bk_selector_t;
173 
174 
175 /*
176  * Call back structure to create new name for objects at restore time.
177  */
178 struct rs_name_maker;
179 typedef char *(*rsm_fp_t)(struct rs_name_maker *,
180 	char *buf,
181 	int pos,
182 	char *path);
183 
184 struct rs_name_maker {
185 	rsm_fp_t rn_fp;
186 	void *rn_nlp;
187 };
188 
189 
190 /*
191  *  RSFLG_OVR_*: overwriting policies.  Refer to LBR FSD for more info.
192  *  RSFLG_MATCH_WCARD: should wildcards be supported in the selection list.
193  *  RSFLG_IGNORE_CASE: should the compare be case-insensetive.  NDMP needs
194  *  	case-sensetive name comparison.
195  */
196 #define	RSFLG_OVR_ALWAYS	0x00000001
197 #define	RSFLG_OVR_NEVER		0x00000002
198 #define	RSFLG_OVR_UPDATE	0x00000004
199 #define	RSFLG_MATCH_WCARD	0x00000008
200 #define	RSFLG_IGNORE_CASE	0x00000010
201 
202 
203 /*
204  * Different cases where two paths can match with each other.
205  * Parent means that the current path, is parent of an entry in
206  * the selection list.
207  * Child means that the current path, is child of an entry in the
208  * selection list.
209  */
210 #define	PM_NONE		0
211 #define	PM_EXACT	1
212 #define	PM_PARENT	2
213 #define	PM_CHILD	3
214 
215 extern tlm_job_stats_t *tlm_new_job_stats(char *);
216 extern tlm_job_stats_t *tlm_ref_job_stats(char *);
217 extern void tlm_un_ref_job_stats(char *);
218 extern boolean_t tlm_is_excluded(char *, char *, char **);
219 extern char *tlm_build_snapshot_name(char *, char *, char *);
220 extern char *tlm_remove_checkpoint(char *, char *);
221 extern tlm_buffers_t *tlm_allocate_buffers(boolean_t, long);
222 extern tlm_buffer_t *tlm_buffer_advance_in_idx(tlm_buffers_t *);
223 extern tlm_buffer_t *tlm_buffer_advance_out_idx(tlm_buffers_t *);
224 extern tlm_buffer_t *tlm_buffer_in_buf(tlm_buffers_t *, int *);
225 extern tlm_buffer_t *tlm_buffer_out_buf(tlm_buffers_t *, int *);
226 extern void tlm_buffer_mark_empty(tlm_buffer_t *);
227 extern void tlm_buffer_release_in_buf(tlm_buffers_t *);
228 extern void tlm_buffer_release_out_buf(tlm_buffers_t *);
229 extern void tlm_buffer_in_buf_wait(tlm_buffers_t *);
230 extern void tlm_buffer_out_buf_wait(tlm_buffers_t *);
231 extern void tlm_buffer_in_buf_timed_wait(tlm_buffers_t *, unsigned);
232 extern void tlm_buffer_out_buf_timed_wait(tlm_buffers_t *, unsigned);
233 extern char *tlm_get_write_buffer(long, long *, tlm_buffers_t *, int);
234 extern char *tlm_get_read_buffer(int, int *, tlm_buffers_t *, int *);
235 extern void tlm_unget_read_buffer(tlm_buffers_t *, int);
236 extern void tlm_unget_write_buffer(tlm_buffers_t *, int);
237 extern void tlm_release_buffers(tlm_buffers_t *);
238 extern tlm_cmd_t *tlm_create_reader_writer_ipc(boolean_t, long);
239 extern void tlm_release_reader_writer_ipc(tlm_cmd_t *);
240 
241 extern void tlm_cmd_wait(tlm_cmd_t *, uint32_t);
242 extern void tlm_cmd_signal(tlm_cmd_t *, uint32_t);
243 
244 typedef int (*path_hist_func_t)(lbr_fhlog_call_backs_t *,
245     char *,
246     struct stat64 *,
247     u_longlong_t);
248 
249 typedef int (*dir_hist_func_t)(lbr_fhlog_call_backs_t *,
250     char *,
251     struct stat64 *);
252 
253 typedef int (*node_hist_func_t)(lbr_fhlog_call_backs_t *,
254     char *,
255     char *,
256     struct stat64 *,
257     u_longlong_t);
258 
259 lbr_fhlog_call_backs_t *lbrlog_callbacks_init(void *,
260     path_hist_func_t,
261     dir_hist_func_t,
262     node_hist_func_t);
263 
264 typedef struct {
265 	tlm_commands_t *ba_commands;
266 	tlm_cmd_t *ba_cmd;
267 	char *ba_job;
268 	char *ba_dir;
269 	char *ba_sels[NDMP_MAX_SELECTIONS];
270 	pthread_barrier_t ba_barrier;
271 } tlm_backup_restore_arg_t;
272 
273 extern void lbrlog_callbacks_done(lbr_fhlog_call_backs_t *);
274 
275 extern boolean_t tlm_cat_path(char *, char *, char *);
276 
277 extern char *trim_name(char *);
278 
279 extern struct full_dir_info *dup_dir_info(struct full_dir_info *);
280 extern void write_tar_eof(tlm_cmd_t *);
281 extern int tlm_get_chkpnt_time(char *, int, time_t *, char *);
282 extern struct full_dir_info *tlm_new_dir_info(fs_fhandle_t *,
283     char *,
284     char *);
285 extern void tlm_release_list(char **);
286 extern longlong_t tlm_get_data_offset(tlm_cmd_t *);
287 extern int tlm_tarhdr_size(void);
288 
289 #endif	/* _TLM_BUFFERS_H_ */
290