1 /* 2 * Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 #include <err.h> 32 #include <inttypes.h> 33 #include <md5.h> 34 #include <pthread.h> 35 #include <stdlib.h> 36 #include <strings.h> 37 38 #if defined(MKUZ_DEBUG) 39 # include <stdio.h> 40 #endif 41 42 #include "mkuz_conveyor.h" 43 #include "mkuz_cfg.h" 44 #include "mkuzip.h" 45 #include "mkuz_format.h" 46 #include "mkuz_blk.h" 47 #include "mkuz_fqueue.h" 48 #include "mkuz_blk_chain.h" 49 50 static void compute_digest(struct mkuz_blk *); 51 52 struct cw_args { 53 struct mkuz_conveyor *cvp; 54 struct mkuz_cfg *cfp; 55 }; 56 57 static void * 58 cworker(void *p) 59 { 60 struct cw_args *cwp; 61 struct mkuz_cfg *cfp; 62 struct mkuz_blk *oblk, *iblk; 63 struct mkuz_conveyor *cvp; 64 void *c_ctx; 65 66 cwp = (struct cw_args *)p; 67 cfp = cwp->cfp; 68 cvp = cwp->cvp; 69 free(cwp); 70 c_ctx = cfp->handler->f_init(cfp->blksz); 71 for (;;) { 72 iblk = mkuz_fqueue_deq(cvp->wrk_queue); 73 if (iblk == MKUZ_BLK_EOF) { 74 /* Let other threads to see the EOF block */ 75 mkuz_fqueue_enq(cvp->wrk_queue, iblk); 76 break; 77 } 78 if (cfp->no_zcomp == 0 && 79 mkuz_memvcmp(iblk->data, '\0', iblk->info.len) != 0) { 80 /* All zeroes block */ 81 oblk = mkuz_blk_ctor(0); 82 } else { 83 oblk = cfp->handler->f_compress(c_ctx, iblk); 84 if (cfp->en_dedup != 0) { 85 compute_digest(oblk); 86 } 87 } 88 oblk->info.blkno = iblk->info.blkno; 89 mkuz_fqueue_enq(cvp->results, oblk); 90 free(iblk); 91 } 92 return (NULL); 93 } 94 95 static void 96 compute_digest(struct mkuz_blk *bp) 97 { 98 MD5_CTX mcontext; 99 100 MD5Init(&mcontext); 101 MD5Update(&mcontext, bp->data, bp->info.len); 102 MD5Final(bp->info.digest, &mcontext); 103 } 104 105 struct mkuz_conveyor * 106 mkuz_conveyor_ctor(struct mkuz_cfg *cfp) 107 { 108 struct mkuz_conveyor *cp; 109 struct cw_args *cwp; 110 int i, r; 111 112 cp = mkuz_safe_zmalloc(sizeof(struct mkuz_conveyor) + 113 (sizeof(pthread_t) * cfp->nworkers)); 114 115 cp->wrk_queue = mkuz_fqueue_ctor(1); 116 cp->results = mkuz_fqueue_ctor(1); 117 118 for (i = 0; i < cfp->nworkers; i++) { 119 cwp = mkuz_safe_zmalloc(sizeof(struct cw_args)); 120 cwp->cfp = cfp; 121 cwp->cvp = cp; 122 r = pthread_create(&cp->wthreads[i], NULL, cworker, (void *)cwp); 123 if (r != 0) { 124 errx(1, "mkuz_conveyor_ctor: pthread_create() failed"); 125 /* Not reached */ 126 } 127 } 128 return (cp); 129 } 130