Annotation of src/usr.bin/rsync/extern.h, Revision 1.43
1.43 ! claudio 1: /* $OpenBSD: extern.h,v 1.42 2021/10/22 11:10:34 claudio Exp $ */
1.1 benno 2: /*
3: * Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #ifndef EXTERN_H
18: #define EXTERN_H
19:
20: /*
21: * This is the rsync protocol version that we support.
22: */
23: #define RSYNC_PROTOCOL (27)
24:
25: /*
26: * Maximum amount of file data sent over the wire at once.
27: */
28: #define MAX_CHUNK (32 * 1024)
29:
30: /*
31: * This is the minimum size for a block of data not including those in
32: * the remainder block.
33: */
34: #define BLOCK_SIZE_MIN (700)
35:
36: /*
1.42 claudio 37: * Maximum number of base directories that can be used.
38: */
39: #define MAX_BASEDIR 20
40:
41: #define BASE_MODE_COMPARE 1
42: #define BASE_MODE_COPY 2
43: #define BASE_MODE_LINK 3
44:
45: /*
1.1 benno 46: * The sender and receiver use a two-phase synchronisation process.
47: * The first uses two-byte hashes; the second, 16-byte.
48: * (The second must hold a full MD4 digest.)
49: */
50: #define CSUM_LENGTH_PHASE1 (2)
51: #define CSUM_LENGTH_PHASE2 (16)
1.37 claudio 52:
53: /*
54: * Rsync error codes.
55: */
56: #define ERR_SYNTAX 1
57: #define ERR_PROTOCOL 2
58: #define ERR_SOCK_IO 10
59: #define ERR_FILE_IO 11
60: #define ERR_WIREPROTO 12
61: #define ERR_IPC 14 /* catchall for any kind of syscall error */
62: #define ERR_TERMIMATED 16
63: #define ERR_WAITPID 21
64: #define ERR_NOMEM 22
1.1 benno 65:
1.14 florian 66: /*
1.34 claudio 67: * Use this for --timeout.
1.14 florian 68: * All poll events will use it and catch time-outs.
69: */
1.34 claudio 70: extern int poll_timeout;
1.13 florian 71:
1.1 benno 72: /*
73: * Operating mode for a client or a server.
74: * Sender means we synchronise local files with those from remote.
75: * Receiver is the opposite.
76: * This is relative to which host we're running on.
77: */
78: enum fmode {
79: FARGS_SENDER,
80: FARGS_RECEIVER
81: };
82:
83: /*
84: * File arguments given on the command line.
85: * See struct opts.
86: */
87: struct fargs {
88: char *host; /* hostname or NULL if local */
89: char **sources; /* transfer source */
90: size_t sourcesz; /* number of sources */
91: char *sink; /* transfer endpoint */
92: enum fmode mode; /* mode of operation */
93: int remote; /* uses rsync:// or :: for remote */
94: char *module; /* if rsync://, the module */
95: };
96:
97: /*
98: * The subset of stat(2) information that we need.
99: * (There are some parts we don't use yet.)
100: */
101: struct flstat {
1.12 florian 102: mode_t mode; /* mode */
103: uid_t uid; /* user */
104: gid_t gid; /* group */
105: dev_t rdev; /* device type */
106: off_t size; /* size */
107: time_t mtime; /* modification */
1.1 benno 108: unsigned int flags;
1.12 florian 109: #define FLSTAT_TOP_DIR 0x01 /* a top-level directory */
1.1 benno 110:
111: };
112:
113: /*
114: * A list of files with their statistics.
115: */
116: struct flist {
117: char *path; /* path relative to root */
118: const char *wpath; /* "working" path for receiver */
119: struct flstat st; /* file information */
120: char *link; /* symlink target or NULL */
121: };
122:
123: /*
124: * Options passed into the command line.
125: * See struct fargs.
126: */
127: struct opts {
1.3 deraadt 128: int sender; /* --sender */
129: int server; /* --server */
130: int recursive; /* -r */
131: int dry_run; /* -n */
132: int preserve_times; /* -t */
133: int preserve_perms; /* -p */
134: int preserve_links; /* -l */
1.5 benno 135: int preserve_gids; /* -g */
1.9 florian 136: int preserve_uids; /* -u */
1.3 deraadt 137: int del; /* --delete */
1.12 florian 138: int devices; /* --devices */
139: int specials; /* --specials */
1.36 job 140: int no_motd; /* --no-motd */
1.22 benno 141: int numeric_ids; /* --numeric-ids */
1.28 bket 142: int one_file_system; /* -x */
1.42 claudio 143: int alt_base_mode;
1.43 ! claudio 144: off_t max_size; /* --max-size */
! 145: off_t min_size; /* --min-size */
1.3 deraadt 146: char *rsync_path; /* --rsync-path */
1.4 deraadt 147: char *ssh_prog; /* --rsh or -e */
1.18 deraadt 148: char *port; /* --port */
1.32 claudio 149: char *address; /* --address */
1.42 claudio 150: char *basedir[MAX_BASEDIR];
1.1 benno 151: };
152:
1.40 claudio 153: enum rule_type {
154: RULE_NONE,
155: RULE_EXCLUDE,
156: RULE_INCLUDE,
157: RULE_CLEAR,
158: #ifdef NOTYET
159: RULE_MERGE,
160: RULE_DIR_MERGE,
161: RULE_SHOW,
162: RULE_HIDE,
163: RULE_PROTECT,
164: RULE_RISK,
165: #endif
166: };
167:
1.1 benno 168: /*
169: * An individual block description for a file.
170: * See struct blkset.
171: */
172: struct blk {
173: off_t offs; /* offset in file */
174: size_t idx; /* block index */
175: size_t len; /* bytes in block */
176: uint32_t chksum_short; /* fast checksum */
177: unsigned char chksum_long[CSUM_LENGTH_PHASE2]; /* slow checksum */
178: };
179:
1.14 florian 180: enum blkstatst {
181: BLKSTAT_NONE = 0,
1.21 benno 182: BLKSTAT_NEXT,
1.14 florian 183: BLKSTAT_DATA,
184: BLKSTAT_TOK,
185: BLKSTAT_HASH,
1.21 benno 186: BLKSTAT_DONE,
187: BLKSTAT_PHASE,
1.14 florian 188: };
189:
1.1 benno 190: /*
1.13 florian 191: * Information for the sender updating receiver blocks reentrantly.
192: */
193: struct blkstat {
1.14 florian 194: off_t offs; /* position in sender file */
195: off_t total; /* total amount processed */
196: off_t dirty; /* total amount sent */
197: size_t hint; /* optimisation: next probable match */
198: void *map; /* mapped file or MAP_FAILED otherwise */
199: size_t mapsz; /* size of file or zero */
200: int fd; /* descriptor girding the map */
201: enum blkstatst curst; /* FSM for sending file blocks */
202: off_t curpos; /* sending: position in file to send */
203: off_t curlen; /* sending: length of send */
204: int32_t curtok; /* sending: next matching token or zero */
1.31 florian 205: struct blktab *blktab; /* hashtable of blocks */
206: uint32_t s1; /* partial sum for computing fast hash */
207: uint32_t s2; /* partial sum for computing fast hash */
1.13 florian 208: };
209:
210: /*
1.1 benno 211: * When transferring file contents, we break the file down into blocks
212: * and work with those.
213: */
214: struct blkset {
215: off_t size; /* file size */
216: size_t rem; /* terminal block length if non-zero */
217: size_t len; /* block length */
218: size_t csum; /* checksum length */
219: struct blk *blks; /* all blocks */
220: size_t blksz; /* number of blks */
221: };
222:
223: /*
224: * Values required during a communication session.
225: */
226: struct sess {
227: const struct opts *opts; /* system options */
228: int32_t seed; /* checksum seed */
229: int32_t lver; /* local version */
230: int32_t rver; /* remote version */
231: uint64_t total_read; /* non-logging wire/reads */
232: uint64_t total_size; /* total file size */
233: uint64_t total_write; /* non-logging wire/writes */
234: int mplex_reads; /* multiplexing reads? */
235: size_t mplex_read_remain; /* remaining bytes */
236: int mplex_writes; /* multiplexing writes? */
237: };
238:
1.6 benno 239: /*
240: * Combination of name and numeric id for groups and users.
241: */
242: struct ident {
243: int32_t id; /* the gid_t or uid_t */
244: int32_t mapped; /* if receiving, the mapped gid */
245: char *name; /* resolved name */
246: };
1.27 deraadt 247:
248: typedef struct arglist arglist;
249: struct arglist {
250: char **list;
251: u_int num;
252: u_int nalloc;
253: };
1.35 claudio 254: void addargs(arglist *, const char *, ...)
1.27 deraadt 255: __attribute__((format(printf, 2, 3)));
256: void freeargs(arglist *);
1.6 benno 257:
1.1 benno 258: struct download;
259: struct upload;
260:
1.29 benno 261: extern int verbose;
262:
1.17 deraadt 263: #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
1.14 florian 264:
1.29 benno 265: #define LOG0(_fmt, ...) \
1.33 deraadt 266: rsync_log( -1, (_fmt), ##__VA_ARGS__)
1.29 benno 267: #define LOG1(_fmt, ...) \
1.33 deraadt 268: rsync_log( 0, (_fmt), ##__VA_ARGS__)
1.29 benno 269: #define LOG2(_fmt, ...) \
1.33 deraadt 270: rsync_log( 1, (_fmt), ##__VA_ARGS__)
1.29 benno 271: #define LOG3(_fmt, ...) \
1.33 deraadt 272: rsync_log( 2, (_fmt), ##__VA_ARGS__)
1.29 benno 273: #define LOG4(_fmt, ...) \
1.33 deraadt 274: rsync_log( 3, (_fmt), ##__VA_ARGS__)
1.29 benno 275: #define ERRX1(_fmt, ...) \
1.33 deraadt 276: rsync_errx1( (_fmt), ##__VA_ARGS__)
1.29 benno 277: #define WARNX(_fmt, ...) \
1.33 deraadt 278: rsync_warnx( (_fmt), ##__VA_ARGS__)
1.29 benno 279: #define WARN(_fmt, ...) \
1.33 deraadt 280: rsync_warn(0, (_fmt), ##__VA_ARGS__)
1.29 benno 281: #define WARN1(_fmt, ...) \
1.33 deraadt 282: rsync_warn(1, (_fmt), ##__VA_ARGS__)
1.29 benno 283: #define WARN2(_fmt, ...) \
1.33 deraadt 284: rsync_warn(2, (_fmt), ##__VA_ARGS__)
1.29 benno 285: #define ERR(_fmt, ...) \
1.33 deraadt 286: rsync_err( (_fmt), ##__VA_ARGS__)
1.29 benno 287: #define ERRX(_fmt, ...) \
1.33 deraadt 288: rsync_errx( (_fmt), ##__VA_ARGS__)
1.29 benno 289:
1.39 claudio 290: void rsync_log(int, const char *, ...)
1.33 deraadt 291: __attribute__((format(printf, 2, 3)));
1.39 claudio 292: void rsync_warnx1(const char *, ...)
1.33 deraadt 293: __attribute__((format(printf, 1, 2)));
1.39 claudio 294: void rsync_warn(int, const char *, ...)
1.33 deraadt 295: __attribute__((format(printf, 2, 3)));
1.39 claudio 296: void rsync_warnx(const char *, ...)
1.33 deraadt 297: __attribute__((format(printf, 1, 2)));
1.39 claudio 298: void rsync_err(const char *, ...)
1.33 deraadt 299: __attribute__((format(printf, 1, 2)));
1.39 claudio 300: void rsync_errx(const char *, ...)
1.33 deraadt 301: __attribute__((format(printf, 1, 2)));
1.39 claudio 302: void rsync_errx1(const char *, ...)
1.33 deraadt 303: __attribute__((format(printf, 1, 2)));
1.1 benno 304:
1.39 claudio 305: int flist_del(struct sess *, int, const struct flist *, size_t);
306: int flist_gen(struct sess *, size_t, char **, struct flist **, size_t *);
307: int flist_gen_local(struct sess *, const char *, struct flist **, size_t *);
308: void flist_free(struct flist *, size_t);
309: int flist_recv(struct sess *, int, struct flist **, size_t *);
310: int flist_send(struct sess *, int, int, const struct flist *, size_t);
311: int flist_gen_dels(struct sess *, const char *, struct flist **, size_t *,
312: const struct flist *, size_t);
313:
1.42 claudio 314: const char *alt_base_mode(int);
315: char **fargs_cmdline(struct sess *, const struct fargs *, size_t *);
1.39 claudio 316:
317: int io_read_buf(struct sess *, int, void *, size_t);
318: int io_read_byte(struct sess *, int, uint8_t *);
319: int io_read_check(int);
320: int io_read_flush(struct sess *, int);
321: int io_read_int(struct sess *, int, int32_t *);
322: int io_read_uint(struct sess *, int, uint32_t *);
323: int io_read_long(struct sess *, int, int64_t *);
324: int io_read_size(struct sess *, int, size_t *);
325: int io_read_ulong(struct sess *, int, uint64_t *);
326: int io_write_buf(struct sess *, int, const void *, size_t);
327: int io_write_byte(struct sess *, int, uint8_t);
328: int io_write_int(struct sess *, int, int32_t);
329: int io_write_uint(struct sess *, int, uint32_t);
330: int io_write_line(struct sess *, int, const char *);
331: int io_write_long(struct sess *, int, int64_t);
332: int io_write_ulong(struct sess *, int, uint64_t);
333:
334: int io_lowbuffer_alloc(struct sess *, void **, size_t *, size_t *, size_t);
335: void io_lowbuffer_int(struct sess *, void *, size_t *, size_t, int32_t);
336: void io_lowbuffer_buf(struct sess *, void *, size_t *, size_t, const void *,
337: size_t);
338:
339: void io_buffer_int(void *, size_t *, size_t, int32_t);
340: void io_buffer_buf(void *, size_t *, size_t, const void *, size_t);
341:
342: void io_unbuffer_int(const void *, size_t *, size_t, int32_t *);
343: int io_unbuffer_size(const void *, size_t *, size_t, size_t *);
344: void io_unbuffer_buf(const void *, size_t *, size_t, void *, size_t);
345:
346: int rsync_receiver(struct sess *, int, int, const char *);
347: int rsync_sender(struct sess *, int, int, size_t, char **);
348: int rsync_client(const struct opts *, int, const struct fargs *);
349: int rsync_connect(const struct opts *, int *, const struct fargs *);
350: int rsync_socket(const struct opts *, int, const struct fargs *);
351: int rsync_server(const struct opts *, size_t, char *[]);
352: int rsync_downloader(struct download *, struct sess *, int *);
353: int rsync_set_metadata(struct sess *, int, int, const struct flist *,
354: const char *);
355: int rsync_set_metadata_at(struct sess *, int, int, const struct flist *,
356: const char *);
357: int rsync_uploader(struct upload *, int *, struct sess *, int *);
358: int rsync_uploader_tail(struct upload *, struct sess *);
359:
360: struct download *download_alloc(struct sess *, int, const struct flist *,
361: size_t, int);
362: void download_free(struct download *);
363: struct upload *upload_alloc(const char *, int, int, size_t,
364: const struct flist *, size_t, mode_t);
365: void upload_free(struct upload *);
1.31 florian 366:
367: struct blktab *blkhash_alloc(void);
368: int blkhash_set(struct blktab *, const struct blkset *);
369: void blkhash_free(struct blktab *);
1.1 benno 370:
1.39 claudio 371: struct blkset *blk_recv(struct sess *, int, const char *);
372: void blk_recv_ack(char [20], const struct blkset *, int32_t);
373: void blk_match(struct sess *, const struct blkset *,
374: const char *, struct blkstat *);
375: int blk_send(struct sess *, int, size_t, const struct blkset *,
376: const char *);
377: int blk_send_ack(struct sess *, int, struct blkset *);
378:
379: uint32_t hash_fast(const void *, size_t);
380: void hash_slow(const void *, size_t, unsigned char *,
381: const struct sess *);
382: void hash_file(const void *, size_t, unsigned char *,
383: const struct sess *);
1.42 claudio 384:
385: void copy_file(int, const char *, const struct flist *);
1.39 claudio 386:
387: int mkpath(char *);
388:
389: int mkstempat(int, char *);
390: char *mkstemplinkat(char*, int, char *);
391: char *mkstempfifoat(int, char *);
392: char *mkstempnodat(int, char *, mode_t, dev_t);
393: char *mkstempsock(const char *, char *);
394: int mktemplate(char **, const char *, int);
1.40 claudio 395:
396: int parse_rule(char *line, enum rule_type);
1.41 claudio 397: void parse_file(const char *, enum rule_type);
1.40 claudio 398: void send_rules(struct sess *, int);
399: void recv_rules(struct sess *, int);
400: int rules_match(const char *, int);
401:
402: int rmatch(const char *, const char *, int);
1.39 claudio 403:
404: char *symlink_read(const char *);
405: char *symlinkat_read(int, const char *);
406:
407: int sess_stats_send(struct sess *, int);
408: int sess_stats_recv(struct sess *, int);
409:
410: int idents_add(int, struct ident **, size_t *, int32_t);
411: void idents_assign_gid(struct sess *, struct flist *, size_t,
412: const struct ident *, size_t);
413: void idents_assign_uid(struct sess *, struct flist *, size_t,
414: const struct ident *, size_t);
415: void idents_free(struct ident *, size_t);
416: int idents_recv(struct sess *, int, struct ident **, size_t *);
417: void idents_remap(struct sess *, int, struct ident *, size_t);
418: int idents_send(struct sess *, int, const struct ident *, size_t);
1.1 benno 419:
420: #endif /*!EXTERN_H*/
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