-/*
- Copyright (C) Andrew Tridgell 1996
- Copyright (C) Paul Mackerras 1996
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that 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.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+/*
+ * Routines used by the file-transfer code.
+ *
+ * Copyright (C) 1996 Andrew Tridgell
+ * Copyright (C) 1996 Paul Mackerras
+ * Copyright (C) 2003-2022 Wayne Davison
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, visit the http://fsf.org website.
+ */
#include "rsync.h"
+#include "itypes.h"
+#include <zlib.h>
+#ifdef SUPPORT_ZSTD
+#include <zstd.h>
+#endif
+#ifdef SUPPORT_LZ4
+#include <lz4.h>
+#endif
extern int do_compression;
+extern int protocol_version;
+extern int module_id;
+extern int do_compression_level;
+extern char *skip_compress;
+#ifndef Z_INSERT_ONLY
+#define Z_INSERT_ONLY Z_SYNC_FLUSH
+#endif
-/* non-compressing recv token */
-static int simple_recv_token(int f,char **data)
+static int skip_compression_level; /* The least possible compressing for handling skip-compress files. */
+static int per_file_default_level; /* The default level that each new file gets prior to checking its suffix. */
+
+struct suffix_tree {
+ struct suffix_tree *sibling;
+ struct suffix_tree *child;
+ char letter, word_end;
+};
+
+static char *match_list;
+static struct suffix_tree *suftree;
+
+void init_compression_level(void)
+{
+ int min_level, max_level, def_level, off_level;
+
+ switch (do_compression) {
+ case CPRES_NONE:
+ return;
+ case CPRES_ZLIB:
+ case CPRES_ZLIBX:
+ min_level = 1;
+ max_level = Z_BEST_COMPRESSION;
+ def_level = 6; /* Z_DEFAULT_COMPRESSION is -1, so set it to the real default */
+ off_level = skip_compression_level = Z_NO_COMPRESSION;
+ if (do_compression_level == Z_DEFAULT_COMPRESSION)
+ do_compression_level = def_level;
+ break;
+#ifdef SUPPORT_ZSTD
+ case CPRES_ZSTD:
+ min_level = skip_compression_level = ZSTD_minCLevel();
+ max_level = ZSTD_maxCLevel();
+ def_level = ZSTD_CLEVEL_DEFAULT;
+ off_level = CLVL_NOT_SPECIFIED;
+ if (do_compression_level == 0)
+ do_compression_level = def_level;
+ break;
+#endif
+#ifdef SUPPORT_LZ4
+ case CPRES_LZ4:
+ min_level = skip_compression_level = 0;
+ max_level = 0;
+ def_level = 0;
+ off_level = CLVL_NOT_SPECIFIED;
+ break;
+#endif
+ default: /* paranoia to prevent missing case values */
+ NOISY_DEATH("Unknown do_compression value");
+ }
+
+ if (do_compression_level == CLVL_NOT_SPECIFIED)
+ do_compression_level = def_level;
+ else if (do_compression_level == off_level) {
+ do_compression = CPRES_NONE;
+ return;
+ }
+
+ /* We don't bother with any errors or warnings -- just make sure that the values are valid. */
+ if (do_compression_level < min_level)
+ do_compression_level = min_level;
+ else if (do_compression_level > max_level)
+ do_compression_level = max_level;
+}
+
+static void add_suffix(struct suffix_tree **prior, char ltr, const char *str)
{
- static int residue = 0;
- static char *buf = NULL;
- int n;
+ struct suffix_tree *node, *newnode;
+
+ if (ltr == '[') {
+ const char *after = strchr(str, ']');
+ /* Treat "[foo" and "[]" as having a literal '['. */
+ if (after && after++ != str+1) {
+ while ((ltr = *str++) != ']')
+ add_suffix(prior, ltr, after);
+ return;
+ }
+ }
+
+ for (node = *prior; node; prior = &node->sibling, node = node->sibling) {
+ if (node->letter == ltr) {
+ if (*str)
+ add_suffix(&node->child, *str, str+1);
+ else
+ node->word_end = 1;
+ return;
+ }
+ if (node->letter > ltr)
+ break;
+ }
+ newnode = new(struct suffix_tree);
+ newnode->sibling = node;
+ newnode->child = NULL;
+ newnode->letter = ltr;
+ *prior = newnode;
+ if (*str) {
+ add_suffix(&newnode->child, *str, str+1);
+ newnode->word_end = 0;
+ } else
+ newnode->word_end = 1;
+}
+
+static void add_nocompress_suffixes(const char *str)
+{
+ char *buf, *t;
+ const char *f = str;
+
+ buf = new_array(char, strlen(f) + 1);
- if (!buf) {
- buf = (char *)malloc(CHUNK_SIZE);
- if (!buf) out_of_memory("simple_recv_token");
- }
+ while (*f) {
+ if (*f == '/') {
+ f++;
+ continue;
+ }
+ t = buf;
+ do {
+ if (isUpper(f))
+ *t++ = toLower(f);
+ else
+ *t++ = *f;
+ } while (*++f != '/' && *f);
+ *t++ = '\0';
- if (residue == 0) {
- int i = read_int(f);
- if (i <= 0) return i;
- residue = i;
- }
+ add_suffix(&suftree, *buf, buf+1);
+ }
- *data = buf;
- n = MIN(CHUNK_SIZE,residue);
- residue -= n;
- read_buf(f,buf,n);
- return n;
+ free(buf);
}
+static void init_set_compression(void)
+{
+ const char *f;
+ char *t, *start;
+
+ if (skip_compress)
+ add_nocompress_suffixes(skip_compress);
+
+ /* A non-daemon transfer skips the default suffix list if the
+ * user specified --skip-compress. */
+ if (skip_compress && module_id < 0)
+ f = "";
+ else
+ f = lp_dont_compress(module_id);
+
+ match_list = t = new_array(char, strlen(f) + 2);
+
+ per_file_default_level = do_compression_level;
+
+ while (*f) {
+ if (*f == ' ') {
+ f++;
+ continue;
+ }
+
+ start = t;
+ do {
+ if (isUpper(f))
+ *t++ = toLower(f);
+ else
+ *t++ = *f;
+ } while (*++f != ' ' && *f);
+ *t++ = '\0';
+
+ if (t - start == 1+1 && *start == '*') {
+ /* Optimize a match-string of "*". */
+ *match_list = '\0';
+ suftree = NULL;
+ per_file_default_level = skip_compression_level;
+ break;
+ }
+
+ /* Move *.foo items into the stuffix tree. */
+ if (*start == '*' && start[1] == '.' && start[2]
+ && !strpbrk(start+2, ".?*")) {
+ add_suffix(&suftree, start[2], start+3);
+ t = start;
+ }
+ }
+ *t++ = '\0';
+}
+
+/* determine the compression level based on a wildcard filename list */
+void set_compression(const char *fname)
+{
+#if 0 /* No compression algorithms currently allow mid-stream changing of the level. */
+ const struct suffix_tree *node;
+ const char *s;
+ char ltr;
+#endif
+
+ if (!do_compression)
+ return;
+
+ if (!match_list)
+ init_set_compression();
+
+#if 0
+ compression_level = per_file_default_level;
+
+ if (!*match_list && !suftree)
+ return;
+
+ if ((s = strrchr(fname, '/')) != NULL)
+ fname = s + 1;
+
+ for (s = match_list; *s; s += strlen(s) + 1) {
+ if (iwildmatch(s, fname)) {
+ compression_level = skip_compression_level;
+ return;
+ }
+ }
+
+ if (!(node = suftree) || !(s = strrchr(fname, '.'))
+ || s == fname || !(ltr = *++s))
+ return;
+
+ while (1) {
+ if (isUpper(<r))
+ ltr = toLower(<r);
+ while (node->letter != ltr) {
+ if (node->letter > ltr)
+ return;
+ if (!(node = node->sibling))
+ return;
+ }
+ if ((ltr = *++s) == '\0') {
+ if (node->word_end)
+ compression_level = skip_compression_level;
+ return;
+ }
+ if (!(node = node->child))
+ return;
+ }
+#else
+ (void)fname;
+#endif
+}
+
+/* non-compressing recv token */
+static int32 simple_recv_token(int f, char **data)
+{
+ static int32 residue;
+ static char *buf;
+ int32 n;
+
+ if (!buf)
+ buf = new_array(char, CHUNK_SIZE);
+
+ if (residue == 0) {
+ int32 i = read_int(f);
+ if (i <= 0)
+ return i;
+ residue = i;
+ }
+
+ *data = buf;
+ n = MIN(CHUNK_SIZE,residue);
+ residue -= n;
+ read_buf(f,buf,n);
+ return n;
+}
/* non-compressing send token */
-static void simple_send_token(int f,int token,
- struct map_struct *buf,int offset,int n)
+static void simple_send_token(int f, int32 token, struct map_struct *buf, OFF_T offset, int32 n)
+{
+ if (n > 0) {
+ int32 len = 0;
+ while (len < n) {
+ int32 n1 = MIN(CHUNK_SIZE, n-len);
+ write_int(f, n1);
+ write_buf(f, map_ptr(buf, offset+len, n1), n1);
+ len += n1;
+ }
+ }
+ /* a -2 token means to send data only and no token */
+ if (token != -2)
+ write_int(f, -(token+1));
+}
+
+/* Flag bytes in compressed stream are encoded as follows: */
+#define END_FLAG 0 /* that's all folks */
+#define TOKEN_LONG 0x20 /* followed by 32-bit token number */
+#define TOKENRUN_LONG 0x21 /* ditto with 16-bit run count */
+#define DEFLATED_DATA 0x40 /* + 6-bit high len, then low len byte */
+#define TOKEN_REL 0x80 /* + 6-bit relative token number */
+#define TOKENRUN_REL 0xc0 /* ditto with 16-bit run count */
+
+#define MAX_DATA_COUNT 16383 /* fit 14 bit count into 2 bytes with flags */
+
+/* zlib.h says that if we want to be able to compress something in a single
+ * call, avail_out must be at least 0.1% larger than avail_in plus 12 bytes.
+ * We'll add in 0.1%+16, just to be safe (and we'll avoid floating point,
+ * to ensure that this is a compile-time value). */
+#define AVAIL_OUT_SIZE(avail_in_size) ((avail_in_size)*1001/1000+16)
+
+/* For coding runs of tokens */
+static int32 last_token = -1;
+static int32 run_start;
+static int32 last_run_end;
+
+/* Deflation state */
+static z_stream tx_strm;
+
+/* Output buffer */
+static char *obuf;
+
+/* We want obuf to be able to hold both MAX_DATA_COUNT+2 bytes as well as
+ * AVAIL_OUT_SIZE(CHUNK_SIZE) bytes, so make sure that it's large enough. */
+#if MAX_DATA_COUNT+2 > AVAIL_OUT_SIZE(CHUNK_SIZE)
+#define OBUF_SIZE (MAX_DATA_COUNT+2)
+#else
+#define OBUF_SIZE AVAIL_OUT_SIZE(CHUNK_SIZE)
+#endif
+
+/* Send a deflated token */
+static void
+send_deflated_token(int f, int32 token, struct map_struct *buf, OFF_T offset, int32 nb, int32 toklen)
{
- if (n > 0) {
- int l = 0;
- while (l < n) {
- int n1 = MIN(CHUNK_SIZE,n-l);
- write_int(f,n1);
- write_buf(f,map_ptr(buf,offset+l,n1),n1);
- l += n1;
- }
- }
- write_int(f,-(token+1));
+ static int init_done, flush_pending;
+ int32 n, r;
+
+ if (last_token == -1) {
+ /* initialization */
+ if (!init_done) {
+ tx_strm.next_in = NULL;
+ tx_strm.zalloc = NULL;
+ tx_strm.zfree = NULL;
+ if (deflateInit2(&tx_strm, per_file_default_level,
+ Z_DEFLATED, -15, 8,
+ Z_DEFAULT_STRATEGY) != Z_OK) {
+ rprintf(FERROR, "compression init failed\n");
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ obuf = new_array(char, OBUF_SIZE);
+ init_done = 1;
+ } else
+ deflateReset(&tx_strm);
+ last_run_end = 0;
+ run_start = token;
+ flush_pending = 0;
+ } else if (last_token == -2) {
+ run_start = token;
+ } else if (nb != 0 || token != last_token + 1 || token >= run_start + 65536) {
+ /* output previous run */
+ r = run_start - last_run_end;
+ n = last_token - run_start;
+ if (r >= 0 && r <= 63) {
+ write_byte(f, (n==0? TOKEN_REL: TOKENRUN_REL) + r);
+ } else {
+ write_byte(f, (n==0? TOKEN_LONG: TOKENRUN_LONG));
+ write_int(f, run_start);
+ }
+ if (n != 0) {
+ write_byte(f, n);
+ write_byte(f, n >> 8);
+ }
+ last_run_end = last_token;
+ run_start = token;
+ }
+
+ last_token = token;
+
+ if (nb != 0 || flush_pending) {
+ /* deflate the data starting at offset */
+ int flush = Z_NO_FLUSH;
+ tx_strm.avail_in = 0;
+ tx_strm.avail_out = 0;
+ do {
+ if (tx_strm.avail_in == 0 && nb != 0) {
+ /* give it some more input */
+ n = MIN(nb, CHUNK_SIZE);
+ tx_strm.next_in = (Bytef *)
+ map_ptr(buf, offset, n);
+ tx_strm.avail_in = n;
+ nb -= n;
+ offset += n;
+ }
+ if (tx_strm.avail_out == 0) {
+ tx_strm.next_out = (Bytef *)(obuf + 2);
+ tx_strm.avail_out = MAX_DATA_COUNT;
+ if (flush != Z_NO_FLUSH) {
+ /*
+ * We left the last 4 bytes in the
+ * buffer, in case they are the
+ * last 4. Move them to the front.
+ */
+ memcpy(tx_strm.next_out, obuf+MAX_DATA_COUNT-2, 4);
+ tx_strm.next_out += 4;
+ tx_strm.avail_out -= 4;
+ }
+ }
+ if (nb == 0 && token != -2)
+ flush = Z_SYNC_FLUSH;
+ r = deflate(&tx_strm, flush);
+ if (r != Z_OK) {
+ rprintf(FERROR, "deflate returned %d\n", r);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ if (nb == 0 || tx_strm.avail_out == 0) {
+ n = MAX_DATA_COUNT - tx_strm.avail_out;
+ if (flush != Z_NO_FLUSH) {
+ /*
+ * We have to trim off the last 4
+ * bytes of output when flushing
+ * (they are just 0, 0, ff, ff).
+ */
+ n -= 4;
+ }
+ if (n > 0) {
+ obuf[0] = DEFLATED_DATA + (n >> 8);
+ obuf[1] = n;
+ write_buf(f, obuf, n+2);
+ }
+ }
+ } while (nb != 0 || tx_strm.avail_out == 0);
+ flush_pending = token == -2;
+ }
+
+ if (token == -1) {
+ /* end of file - clean up */
+ write_byte(f, END_FLAG);
+ } else if (token != -2 && do_compression == CPRES_ZLIB) {
+ /* Add the data in the current block to the compressor's
+ * history and hash table. */
+ do {
+ /* Break up long sections in the same way that
+ * see_deflate_token() does. */
+ int32 n1 = toklen > 0xffff ? 0xffff : toklen;
+ toklen -= n1;
+ tx_strm.next_in = (Bytef *)map_ptr(buf, offset, n1);
+ tx_strm.avail_in = n1;
+ if (protocol_version >= 31) /* Newer protocols avoid a data-duplicating bug */
+ offset += n1;
+ tx_strm.next_out = (Bytef *) obuf;
+ tx_strm.avail_out = AVAIL_OUT_SIZE(CHUNK_SIZE);
+ r = deflate(&tx_strm, Z_INSERT_ONLY);
+ if (r != Z_OK || tx_strm.avail_in != 0) {
+ rprintf(FERROR, "deflate on token returned %d (%d bytes left)\n",
+ r, tx_strm.avail_in);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ } while (toklen > 0);
+ }
}
+/* tells us what the receiver is in the middle of doing */
+static enum { r_init, r_idle, r_running, r_inflating, r_inflated } recv_state;
+/* for inflating stuff */
+static z_stream rx_strm;
+static char *cbuf;
+static char *dbuf;
+/* for decoding runs of tokens */
+static int32 rx_token;
+static int32 rx_run;
+
+/* Receive a deflated token and inflate it */
+static int32 recv_deflated_token(int f, char **data)
+{
+ static int init_done;
+ static int32 saved_flag;
+ int32 n, flag;
+ int r;
+
+ for (;;) {
+ switch (recv_state) {
+ case r_init:
+ if (!init_done) {
+ rx_strm.next_out = NULL;
+ rx_strm.zalloc = NULL;
+ rx_strm.zfree = NULL;
+ if (inflateInit2(&rx_strm, -15) != Z_OK) {
+ rprintf(FERROR, "inflate init failed\n");
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ cbuf = new_array(char, MAX_DATA_COUNT);
+ dbuf = new_array(char, AVAIL_OUT_SIZE(CHUNK_SIZE));
+ init_done = 1;
+ } else {
+ inflateReset(&rx_strm);
+ }
+ recv_state = r_idle;
+ rx_token = 0;
+ break;
+
+ case r_idle:
+ case r_inflated:
+ if (saved_flag) {
+ flag = saved_flag & 0xff;
+ saved_flag = 0;
+ } else
+ flag = read_byte(f);
+ if ((flag & 0xC0) == DEFLATED_DATA) {
+ n = ((flag & 0x3f) << 8) + read_byte(f);
+ read_buf(f, cbuf, n);
+ rx_strm.next_in = (Bytef *)cbuf;
+ rx_strm.avail_in = n;
+ recv_state = r_inflating;
+ break;
+ }
+ if (recv_state == r_inflated) {
+ /* check previous inflated stuff ended correctly */
+ rx_strm.avail_in = 0;
+ rx_strm.next_out = (Bytef *)dbuf;
+ rx_strm.avail_out = AVAIL_OUT_SIZE(CHUNK_SIZE);
+ r = inflate(&rx_strm, Z_SYNC_FLUSH);
+ n = AVAIL_OUT_SIZE(CHUNK_SIZE) - rx_strm.avail_out;
+ /*
+ * Z_BUF_ERROR just means no progress was
+ * made, i.e. the decompressor didn't have
+ * any pending output for us.
+ */
+ if (r != Z_OK && r != Z_BUF_ERROR) {
+ rprintf(FERROR, "inflate flush returned %d (%d bytes)\n",
+ r, n);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ if (n != 0 && r != Z_BUF_ERROR) {
+ /* have to return some more data and
+ save the flag for later. */
+ saved_flag = flag + 0x10000;
+ *data = dbuf;
+ return n;
+ }
+ /*
+ * At this point the decompressor should
+ * be expecting to see the 0, 0, ff, ff bytes.
+ */
+ if (!inflateSyncPoint(&rx_strm)) {
+ rprintf(FERROR, "decompressor lost sync!\n");
+ exit_cleanup(RERR_STREAMIO);
+ }
+ rx_strm.avail_in = 4;
+ rx_strm.next_in = (Bytef *)cbuf;
+ cbuf[0] = cbuf[1] = 0;
+ cbuf[2] = cbuf[3] = (char)0xff;
+ inflate(&rx_strm, Z_SYNC_FLUSH);
+ recv_state = r_idle;
+ }
+ if (flag == END_FLAG) {
+ /* that's all folks */
+ recv_state = r_init;
+ return 0;
+ }
+
+ /* here we have a token of some kind */
+ if (flag & TOKEN_REL) {
+ rx_token += flag & 0x3f;
+ flag >>= 6;
+ } else
+ rx_token = read_int(f);
+ if (flag & 1) {
+ rx_run = read_byte(f);
+ rx_run += read_byte(f) << 8;
+ recv_state = r_running;
+ }
+ return -1 - rx_token;
+
+ case r_inflating:
+ rx_strm.next_out = (Bytef *)dbuf;
+ rx_strm.avail_out = AVAIL_OUT_SIZE(CHUNK_SIZE);
+ r = inflate(&rx_strm, Z_NO_FLUSH);
+ n = AVAIL_OUT_SIZE(CHUNK_SIZE) - rx_strm.avail_out;
+ if (r != Z_OK) {
+ rprintf(FERROR, "inflate returned %d (%d bytes)\n", r, n);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ if (rx_strm.avail_in == 0)
+ recv_state = r_inflated;
+ if (n != 0) {
+ *data = dbuf;
+ return n;
+ }
+ break;
+
+ case r_running:
+ ++rx_token;
+ if (--rx_run == 0)
+ recv_state = r_idle;
+ return -1 - rx_token;
+ }
+ }
+}
/*
- * transmit a verbatim buffer of length n followed by a token
- * If token == -1 then we have reached EOF
- * If n == 0 then don't send a buffer
+ * put the data corresponding to a token that we've just returned
+ * from recv_deflated_token into the decompressor's history buffer.
*/
-void send_token(int f,int token,struct map_struct *buf,int offset,
- int n,int toklen)
+static void see_deflate_token(char *buf, int32 len)
{
- if (!do_compression) {
- simple_send_token(f,token,buf,offset,n);
- return;
- }
+ int r;
+ int32 blklen;
+ unsigned char hdr[5];
- /* compressed transmit here */
+ rx_strm.avail_in = 0;
+ blklen = 0;
+ hdr[0] = 0;
+ do {
+ if (rx_strm.avail_in == 0 && len != 0) {
+ if (blklen == 0) {
+ /* Give it a fake stored-block header. */
+ rx_strm.next_in = (Bytef *)hdr;
+ rx_strm.avail_in = 5;
+ blklen = len;
+ if (blklen > 0xffff)
+ blklen = 0xffff;
+ hdr[1] = blklen;
+ hdr[2] = blklen >> 8;
+ hdr[3] = ~hdr[1];
+ hdr[4] = ~hdr[2];
+ } else {
+ rx_strm.next_in = (Bytef *)buf;
+ rx_strm.avail_in = blklen;
+ if (protocol_version >= 31) /* Newer protocols avoid a data-duplicating bug */
+ buf += blklen;
+ len -= blklen;
+ blklen = 0;
+ }
+ }
+ rx_strm.next_out = (Bytef *)dbuf;
+ rx_strm.avail_out = AVAIL_OUT_SIZE(CHUNK_SIZE);
+ r = inflate(&rx_strm, Z_SYNC_FLUSH);
+ if (r != Z_OK && r != Z_BUF_ERROR) {
+ rprintf(FERROR, "inflate (token) returned %d\n", r);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ } while (len || rx_strm.avail_out == 0);
}
+#ifdef SUPPORT_ZSTD
+
+static ZSTD_inBuffer zstd_in_buff;
+static ZSTD_outBuffer zstd_out_buff;
+static ZSTD_CCtx *zstd_cctx;
+
+static void send_zstd_token(int f, int32 token, struct map_struct *buf, OFF_T offset, int32 nb)
+{
+ static int comp_init_done, flush_pending;
+ ZSTD_EndDirective flush = ZSTD_e_continue;
+ int32 n, r;
+
+ /* initialization */
+ if (!comp_init_done) {
+ zstd_cctx = ZSTD_createCCtx();
+ if (!zstd_cctx) {
+ rprintf(FERROR, "compression init failed\n");
+ exit_cleanup(RERR_PROTOCOL);
+ }
+
+ obuf = new_array(char, OBUF_SIZE);
+
+ ZSTD_CCtx_setParameter(zstd_cctx, ZSTD_c_compressionLevel, do_compression_level);
+ zstd_out_buff.dst = obuf + 2;
+
+ comp_init_done = 1;
+ }
+
+ if (last_token == -1) {
+ last_run_end = 0;
+ run_start = token;
+ flush_pending = 0;
+ } else if (last_token == -2) {
+ run_start = token;
+ } else if (nb != 0 || token != last_token + 1 || token >= run_start + 65536) {
+ /* output previous run */
+ r = run_start - last_run_end;
+ n = last_token - run_start;
+
+ if (r >= 0 && r <= 63) {
+ write_byte(f, (n==0? TOKEN_REL: TOKENRUN_REL) + r);
+ } else {
+ write_byte(f, (n==0? TOKEN_LONG: TOKENRUN_LONG));
+ write_int(f, run_start);
+ }
+ if (n != 0) {
+ write_byte(f, n);
+ write_byte(f, n >> 8);
+ }
+ last_run_end = last_token;
+ run_start = token;
+ }
+
+ last_token = token;
+
+ if (nb || flush_pending) {
+
+ zstd_in_buff.src = map_ptr(buf, offset, nb);
+ zstd_in_buff.size = nb;
+ zstd_in_buff.pos = 0;
+
+ do {
+ if (zstd_out_buff.size == 0) {
+ zstd_out_buff.size = MAX_DATA_COUNT;
+ zstd_out_buff.pos = 0;
+ }
+
+ /* File ended, flush */
+ if (token != -2)
+ flush = ZSTD_e_flush;
+
+ r = ZSTD_compressStream2(zstd_cctx, &zstd_out_buff, &zstd_in_buff, flush);
+ if (ZSTD_isError(r)) {
+ rprintf(FERROR, "ZSTD_compressStream returned %d\n", r);
+ exit_cleanup(RERR_STREAMIO);
+ }
+
+ /*
+ * Nothing is sent if the buffer isn't full so avoid smaller
+ * transfers. If a file is finished then we flush the internal
+ * state and send a smaller buffer so that the remote side can
+ * finish the file.
+ */
+ if (zstd_out_buff.pos == zstd_out_buff.size || flush == ZSTD_e_flush) {
+ n = zstd_out_buff.pos;
+
+ obuf[0] = DEFLATED_DATA + (n >> 8);
+ obuf[1] = n;
+ write_buf(f, obuf, n+2);
+
+ zstd_out_buff.size = 0;
+ }
+ /*
+ * Loop while the input buffer isn't full consumed or the
+ * internal state isn't fully flushed.
+ */
+ } while (zstd_in_buff.pos < zstd_in_buff.size || r > 0);
+ flush_pending = token == -2;
+ }
+
+ if (token == -1) {
+ /* end of file - clean up */
+ write_byte(f, END_FLAG);
+ }
+}
+
+static ZSTD_DCtx *zstd_dctx;
+
+static int32 recv_zstd_token(int f, char **data)
+{
+ static int decomp_init_done;
+ static int out_buffer_size;
+ int32 n, flag;
+ int r;
+
+ if (!decomp_init_done) {
+ zstd_dctx = ZSTD_createDCtx();
+ if (!zstd_dctx) {
+ rprintf(FERROR, "ZSTD_createDStream failed\n");
+ exit_cleanup(RERR_PROTOCOL);
+ }
+
+ /* Output buffer fits two decompressed blocks */
+ out_buffer_size = ZSTD_DStreamOutSize() * 2;
+ cbuf = new_array(char, MAX_DATA_COUNT);
+ dbuf = new_array(char, out_buffer_size);
+
+ zstd_in_buff.src = cbuf;
+ zstd_out_buff.dst = dbuf;
+
+ decomp_init_done = 1;
+ }
+
+ for (;;) {
+ switch (recv_state) {
+ case r_init:
+ recv_state = r_idle;
+ rx_token = 0;
+ break;
+
+ case r_idle:
+ flag = read_byte(f);
+ if ((flag & 0xC0) == DEFLATED_DATA) {
+ n = ((flag & 0x3f) << 8) + read_byte(f);
+ read_buf(f, cbuf, n);
+
+ zstd_in_buff.size = n;
+ zstd_in_buff.pos = 0;
+
+ recv_state = r_inflating;
+ break;
+ }
+
+ if (flag == END_FLAG) {
+ /* that's all folks */
+ recv_state = r_init;
+ return 0;
+ }
+ /* here we have a token of some kind */
+ if (flag & TOKEN_REL) {
+ rx_token += flag & 0x3f;
+ flag >>= 6;
+ } else
+ rx_token = read_int(f);
+ if (flag & 1) {
+ rx_run = read_byte(f);
+ rx_run += read_byte(f) << 8;
+ recv_state = r_running;
+ }
+ return -1 - rx_token;
+
+ case r_inflated: /* zstd doesn't get into this state */
+ break;
+
+ case r_inflating:
+ zstd_out_buff.size = out_buffer_size;
+ zstd_out_buff.pos = 0;
+
+ r = ZSTD_decompressStream(zstd_dctx, &zstd_out_buff, &zstd_in_buff);
+ n = zstd_out_buff.pos;
+ if (ZSTD_isError(r)) {
+ rprintf(FERROR, "ZSTD decomp returned %d (%d bytes)\n", r, n);
+ exit_cleanup(RERR_STREAMIO);
+ }
+
+ /*
+ * If the input buffer is fully consumed and the output
+ * buffer is not full then next step is to read more
+ * data.
+ */
+ if (zstd_in_buff.size == zstd_in_buff.pos && n < out_buffer_size)
+ recv_state = r_idle;
+
+ if (n != 0) {
+ *data = dbuf;
+ return n;
+ }
+ break;
+
+ case r_running:
+ ++rx_token;
+ if (--rx_run == 0)
+ recv_state = r_idle;
+ return -1 - rx_token;
+ }
+ }
+}
+#endif /* SUPPORT_ZSTD */
+
+#ifdef SUPPORT_LZ4
+static void
+send_compressed_token(int f, int32 token, struct map_struct *buf, OFF_T offset, int32 nb)
+{
+ static int init_done, flush_pending;
+ int size = MAX(LZ4_compressBound(CHUNK_SIZE), MAX_DATA_COUNT+2);
+ int32 n, r;
+
+ if (last_token == -1) {
+ if (!init_done) {
+ obuf = new_array(char, size);
+ init_done = 1;
+ }
+ last_run_end = 0;
+ run_start = token;
+ flush_pending = 0;
+ } else if (last_token == -2) {
+ run_start = token;
+ } else if (nb != 0 || token != last_token + 1 || token >= run_start + 65536) {
+ /* output previous run */
+ r = run_start - last_run_end;
+ n = last_token - run_start;
+ if (r >= 0 && r <= 63) {
+ write_byte(f, (n==0? TOKEN_REL: TOKENRUN_REL) + r);
+ } else {
+ write_byte(f, (n==0? TOKEN_LONG: TOKENRUN_LONG));
+ write_int(f, run_start);
+ }
+ if (n != 0) {
+ write_byte(f, n);
+ write_byte(f, n >> 8);
+ }
+ last_run_end = last_token;
+ run_start = token;
+ }
+
+ last_token = token;
+
+ if (nb != 0 || flush_pending) {
+ int available_in, available_out = 0;
+ const char *next_in;
+
+ do {
+ char *next_out = obuf + 2;
+
+ if (available_out == 0) {
+ available_in = MIN(nb, MAX_DATA_COUNT);
+ next_in = map_ptr(buf, offset, available_in);
+ } else
+ available_in /= 2;
+
+ available_out = LZ4_compress_default(next_in, next_out, available_in, size - 2);
+ if (!available_out) {
+ rprintf(FERROR, "compress returned %d\n", available_out);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ if (available_out <= MAX_DATA_COUNT) {
+ obuf[0] = DEFLATED_DATA + (available_out >> 8);
+ obuf[1] = available_out;
+
+ write_buf(f, obuf, available_out + 2);
+
+ available_out = 0;
+ nb -= available_in;
+ offset += available_in;
+ }
+ } while (nb != 0);
+ flush_pending = token == -2;
+ }
+ if (token == -1) {
+ /* end of file - clean up */
+ write_byte(f, END_FLAG);
+ }
+}
+
+static int32 recv_compressed_token(int f, char **data)
+{
+ static int init_done;
+ int32 n, flag;
+ int size = MAX(LZ4_compressBound(CHUNK_SIZE), MAX_DATA_COUNT+2);
+ static const char *next_in;
+ static int avail_in;
+ int avail_out;
+
+ for (;;) {
+ switch (recv_state) {
+ case r_init:
+ if (!init_done) {
+ cbuf = new_array(char, MAX_DATA_COUNT);
+ dbuf = new_array(char, size);
+ init_done = 1;
+ }
+ recv_state = r_idle;
+ rx_token = 0;
+ break;
+
+ case r_idle:
+ flag = read_byte(f);
+ if ((flag & 0xC0) == DEFLATED_DATA) {
+ n = ((flag & 0x3f) << 8) + read_byte(f);
+ read_buf(f, cbuf, n);
+ next_in = (char *)cbuf;
+ avail_in = n;
+ recv_state = r_inflating;
+ break;
+ }
+
+ if (flag == END_FLAG) {
+ /* that's all folks */
+ recv_state = r_init;
+ return 0;
+ }
+
+ /* here we have a token of some kind */
+ if (flag & TOKEN_REL) {
+ rx_token += flag & 0x3f;
+ flag >>= 6;
+ } else
+ rx_token = read_int(f);
+ if (flag & 1) {
+ rx_run = read_byte(f);
+ rx_run += read_byte(f) << 8;
+ recv_state = r_running;
+ }
+ return -1 - rx_token;
+
+ case r_inflating:
+ avail_out = LZ4_decompress_safe(next_in, dbuf, avail_in, size);
+ if (avail_out < 0) {
+ rprintf(FERROR, "uncompress failed: %d\n", avail_out);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ recv_state = r_idle;
+ *data = dbuf;
+ return avail_out;
+
+ case r_inflated: /* lz4 doesn't get into this state */
+ break;
+
+ case r_running:
+ ++rx_token;
+ if (--rx_run == 0)
+ recv_state = r_idle;
+ return -1 - rx_token;
+ }
+ }
+}
+#endif /* SUPPORT_LZ4 */
+
+/**
+ * Transmit a verbatim buffer of length @p n followed by a token.
+ * If token == -1 then we have reached EOF
+ * If n == 0 then don't send a buffer
+ */
+void send_token(int f, int32 token, struct map_struct *buf, OFF_T offset,
+ int32 n, int32 toklen)
+{
+ switch (do_compression) {
+ case CPRES_NONE:
+ simple_send_token(f, token, buf, offset, n);
+ break;
+ case CPRES_ZLIB:
+ case CPRES_ZLIBX:
+ send_deflated_token(f, token, buf, offset, n, toklen);
+ break;
+#ifdef SUPPORT_ZSTD
+ case CPRES_ZSTD:
+ send_zstd_token(f, token, buf, offset, n);
+ break;
+#endif
+#ifdef SUPPORT_LZ4
+ case CPRES_LZ4:
+ send_compressed_token(f, token, buf, offset, n);
+ break;
+#endif
+ default:
+ NOISY_DEATH("Unknown do_compression value");
+ }
+}
/*
- * receive a token or buffer from the other end. If the reurn value is >0 then
+ * receive a token or buffer from the other end. If the return value is >0 then
* it is a data buffer of that length, and *data will point at the data.
* if the return value is -i then it represents token i-1
* if the return value is 0 then the end has been reached
*/
-int recv_token(int f,char **data)
+int32 recv_token(int f, char **data)
{
- if (!do_compression) {
- return simple_recv_token(f,data);
- }
+ switch (do_compression) {
+ case CPRES_NONE:
+ return simple_recv_token(f,data);
+ case CPRES_ZLIB:
+ case CPRES_ZLIBX:
+ return recv_deflated_token(f, data);
+#ifdef SUPPORT_ZSTD
+ case CPRES_ZSTD:
+ return recv_zstd_token(f, data);
+#endif
+#ifdef SUPPORT_LZ4
+ case CPRES_LZ4:
+ return recv_compressed_token(f, data);
+#endif
+ default:
+ NOISY_DEATH("Unknown do_compression value");
+ }
+}
- /* compressed receive here */
- return 0;
+/*
+ * look at the data corresponding to a token, if necessary
+ */
+void see_token(char *data, int32 toklen)
+{
+ switch (do_compression) {
+ case CPRES_NONE:
+ break;
+ case CPRES_ZLIB:
+ see_deflate_token(data, toklen);
+ break;
+ case CPRES_ZLIBX:
+ break;
+#ifdef SUPPORT_ZSTD
+ case CPRES_ZSTD:
+ break;
+#endif
+#ifdef SUPPORT_LZ4
+ case CPRES_LZ4:
+ /*see_uncompressed_token(data, toklen);*/
+ break;
+#endif
+ default:
+ NOISY_DEATH("Unknown do_compression value");
+ }
}
git.samba.org / rsync.git / blobdiff