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/types.h> 28 #include <err.h> 29 #include <inttypes.h> 30 #include <md5.h> 31 #include <pthread.h> 32 #include <stdlib.h> 33 #include <strings.h> 34 35 #if defined(MKUZ_DEBUG) 36 # include <stdio.h> 37 #endif 38 39 #include "mkuz_conveyor.h" 40 #include "mkuz_cfg.h" 41 #include "mkuzip.h" 42 #include "mkuz_blk.h" 43 #include "mkuz_format.h" 44 #include "mkuz_fqueue.h" 45 #include "mkuz_blk_chain.h" 46 47 static void compute_digest(struct mkuz_blk *); 48 49 struct cw_args { 50 struct mkuz_conveyor *cvp; 51 struct mkuz_cfg *cfp; 52 }; 53 54 static void * 55 cworker(void *p) 56 { 57 struct cw_args *cwp; 58 struct mkuz_cfg *cfp; 59 struct mkuz_blk *oblk, *iblk; 60 struct mkuz_conveyor *cvp; 61 void *c_ctx; 62 63 cwp = (struct cw_args *)p; 64 cfp = cwp->cfp; 65 cvp = cwp->cvp; 66 free(cwp); 67 c_ctx = cfp->handler->f_init(&cfp->comp_level); 68 for (;;) { 69 iblk = mkuz_fqueue_deq(cvp->wrk_queue); 70 if (iblk == MKUZ_BLK_EOF) { 71 /* Let other threads to see the EOF block */ 72 mkuz_fqueue_enq(cvp->wrk_queue, iblk); 73 break; 74 } 75 if (cfp->no_zcomp == 0 && 76 mkuz_memvcmp(iblk->data, '\0', iblk->info.len) != 0) { 77 /* All zeroes block */ 78 oblk = mkuz_blk_ctor(0); 79 } else { 80 oblk = mkuz_blk_ctor(cfp->cbound_blksz); 81 cfp->handler->f_compress(c_ctx, iblk, oblk); 82 if (cfp->en_dedup != 0) { 83 compute_digest(oblk); 84 } 85 } 86 oblk->info.blkno = iblk->info.blkno; 87 mkuz_fqueue_enq(cvp->results, oblk); 88 free(iblk); 89 } 90 return (NULL); 91 } 92 93 static void 94 compute_digest(struct mkuz_blk *bp) 95 { 96 MD5_CTX mcontext; 97 98 MD5Init(&mcontext); 99 MD5Update(&mcontext, bp->data, bp->info.len); 100 MD5Final(bp->info.digest, &mcontext); 101 } 102 103 struct mkuz_conveyor * 104 mkuz_conveyor_ctor(struct mkuz_cfg *cfp) 105 { 106 struct mkuz_conveyor *cp; 107 struct cw_args *cwp; 108 int i, r; 109 110 cp = mkuz_safe_zmalloc(sizeof(struct mkuz_conveyor) + 111 (sizeof(pthread_t) * cfp->nworkers)); 112 113 cp->wrk_queue = mkuz_fqueue_ctor(1); 114 cp->results = mkuz_fqueue_ctor(1); 115 116 for (i = 0; i < cfp->nworkers; i++) { 117 cwp = mkuz_safe_zmalloc(sizeof(struct cw_args)); 118 cwp->cfp = cfp; 119 cwp->cvp = cp; 120 r = pthread_create(&cp->wthreads[i], NULL, cworker, (void *)cwp); 121 if (r != 0) { 122 errx(1, "mkuz_conveyor_ctor: pthread_create() failed"); 123 /* Not reached */ 124 } 125 } 126 return (cp); 127 } 128