1229537Sray/*- 2229537Sray * Copyright (c) 2010-2012 Aleksandr Rybalko 3229537Sray * Copyright (c) 2004 Max Khon 4229537Sray * All rights reserved. 5229537Sray * 6229537Sray * Redistribution and use in source and binary forms, with or without 7229537Sray * modification, are permitted provided that the following conditions 8229537Sray * are met: 9229537Sray * 1. Redistributions of source code must retain the above copyright 10229537Sray * notice, this list of conditions and the following disclaimer. 11229537Sray * 2. Redistributions in binary form must reproduce the above copyright 12229537Sray * notice, this list of conditions and the following disclaimer in the 13229537Sray * documentation and/or other materials provided with the distribution. 14229537Sray * 15229537Sray * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16229537Sray * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17229537Sray * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18229537Sray * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19229537Sray * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20229537Sray * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21229537Sray * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22229537Sray * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23229537Sray * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24229537Sray * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25229537Sray * SUCH DAMAGE. 26229537Sray */ 27229537Sray 28229537Sray/* 29229537Sray * GEOM UNCOMPRESS module - simple decompression module for use with read-only 30229537Sray * copressed images maked by mkuzip(8) or mkulzma(8) utilities. 31229537Sray * 32229537Sray * To enable module in kernel config, put this line: 33229537Sray * device geom_uncompress 34229537Sray */ 35229537Sray 36229537Sray#include <sys/cdefs.h> 37229537Sray__FBSDID("$FreeBSD$"); 38229537Sray 39229537Sray#include <sys/param.h> 40229537Sray#include <sys/bio.h> 41229537Sray#include <sys/endian.h> 42229537Sray#include <sys/errno.h> 43229537Sray#include <sys/kernel.h> 44229537Sray#include <sys/lock.h> 45229537Sray#include <sys/mutex.h> 46229537Sray#include <sys/malloc.h> 47229537Sray#include <sys/systm.h> 48229537Sray 49229537Sray#include <geom/geom.h> 50229537Sray 51229537Sray#include <net/zlib.h> 52229537Sray#include <contrib/xz-embedded/linux/include/linux/xz.h> 53229537Sray 54229537Sray#ifdef GEOM_UNCOMPRESS_DEBUG 55229537Sray#define DPRINTF(a) printf a 56229537Srayextern int g_debugflags; 57229537Sray#else 58229537Sray#define DPRINTF(a) 59229537Sray#endif 60229537Sray 61229537Sraystatic MALLOC_DEFINE(M_GEOM_UNCOMPRESS, "geom_uncompress", 62229537Sray "GEOM UNCOMPRESS data structures"); 63229537Sray 64229537Sray#define UNCOMPRESS_CLASS_NAME "UNCOMPRESS" 65229537Sray#define GEOM_UZIP_MAJVER '2' 66229537Sray#define GEOM_ULZMA_MAJVER '3' 67229537Sray 68229537Sray/* 69229537Sray * Maximum allowed valid block size (to prevent foot-shooting) 70229537Sray */ 71229537Sray#define MAX_BLKSZ (MAXPHYS) 72229537Sray 73229537Sray/* 74229537Sray * Integer values (block size, number of blocks, offsets) 75229537Sray * are stored in big-endian (network) order on disk and struct cloop_header 76229537Sray * and in native order in struct g_uncompress_softc 77229537Sray */ 78229537Sray 79229537Sray#define CLOOP_MAGIC_LEN 128 80229537Sraystatic char CLOOP_MAGIC_START[] = "#!/bin/sh\n"; 81229537Sray 82229537Sraystruct cloop_header { 83229537Sray char magic[CLOOP_MAGIC_LEN]; /* cloop magic */ 84229537Sray uint32_t blksz; /* block size */ 85229537Sray uint32_t nblocks; /* number of blocks */ 86229537Sray}; 87229537Sray 88229537Sraystruct g_uncompress_softc { 89229537Sray uint32_t blksz; /* block size */ 90229537Sray uint32_t nblocks; /* number of blocks */ 91229537Sray uint64_t *offsets; 92229537Sray enum { 93229537Sray GEOM_UZIP = 1, 94229537Sray GEOM_ULZMA 95229537Sray } type; 96229537Sray 97229537Sray struct mtx last_mtx; 98229537Sray uint32_t last_blk; /* last blk no */ 99229537Sray char *last_buf; /* last blk data */ 100229537Sray int req_total; /* total requests */ 101229537Sray int req_cached; /* cached requests */ 102229537Sray 103229537Sray /* XZ decoder structs */ 104229537Sray struct xz_buf *b; 105229537Sray struct xz_dec *s; 106229537Sray z_stream *zs; 107229537Sray}; 108229537Sray 109229537Sraystatic void 110229537Srayg_uncompress_softc_free(struct g_uncompress_softc *sc, struct g_geom *gp) 111229537Sray{ 112229537Sray 113229537Sray if (gp != NULL) { 114229537Sray printf("%s: %d requests, %d cached\n", 115229537Sray gp->name, sc->req_total, sc->req_cached); 116229537Sray } 117229537Sray if (sc->offsets != NULL) { 118229537Sray free(sc->offsets, M_GEOM_UNCOMPRESS); 119229537Sray sc->offsets = 0; 120229537Sray } 121229537Sray 122229537Sray switch (sc->type) { 123229537Sray case GEOM_ULZMA: 124229537Sray if (sc->b) { 125229537Sray free(sc->b, M_GEOM_UNCOMPRESS); 126229537Sray sc->b = 0; 127229537Sray } 128229537Sray if (sc->s) { 129229537Sray xz_dec_end(sc->s); 130229537Sray sc->s = 0; 131229537Sray } 132229537Sray break; 133229537Sray case GEOM_UZIP: 134229537Sray if (sc->zs) { 135229537Sray inflateEnd(sc->zs); 136229537Sray free(sc->zs, M_GEOM_UNCOMPRESS); 137229537Sray sc->zs = 0; 138229537Sray } 139229537Sray break; 140229537Sray } 141229537Sray 142229537Sray mtx_destroy(&sc->last_mtx); 143229537Sray free(sc->last_buf, M_GEOM_UNCOMPRESS); 144229537Sray free(sc, M_GEOM_UNCOMPRESS); 145229537Sray} 146229537Sray 147229537Sraystatic void * 148229537Srayz_alloc(void *nil, u_int type, u_int size) 149229537Sray{ 150229537Sray void *ptr; 151229537Sray 152229537Sray ptr = malloc(type * size, M_GEOM_UNCOMPRESS, M_NOWAIT); 153229537Sray return (ptr); 154229537Sray} 155229537Sray 156229537Sraystatic void 157229537Srayz_free(void *nil, void *ptr) 158229537Sray{ 159229537Sray 160229537Sray free(ptr, M_GEOM_UNCOMPRESS); 161229537Sray} 162229537Sray 163229537Sraystatic void 164229537Srayg_uncompress_done(struct bio *bp) 165229537Sray{ 166229537Sray struct g_uncompress_softc *sc; 167229537Sray struct g_provider *pp, *pp2; 168229537Sray struct g_consumer *cp; 169229537Sray struct g_geom *gp; 170229537Sray struct bio *bp2; 171229537Sray uint32_t start_blk, i; 172229537Sray off_t pos, upos; 173229537Sray size_t bsize; 174229537Sray int err; 175229537Sray 176229537Sray err = 0; 177229537Sray bp2 = bp->bio_parent; 178229537Sray pp = bp2->bio_to; 179229537Sray gp = pp->geom; 180229537Sray cp = LIST_FIRST(&gp->consumer); 181229537Sray pp2 = cp->provider; 182229537Sray sc = gp->softc; 183229537Sray DPRINTF(("%s: done\n", gp->name)); 184229537Sray 185229537Sray bp2->bio_error = bp->bio_error; 186229537Sray if (bp2->bio_error != 0) 187229537Sray goto done; 188229537Sray 189229537Sray /* 190229537Sray * Example: 191229537Sray * Uncompressed block size = 65536 192229537Sray * User request: 65540-261632 193229537Sray * (4 uncompressed blocks -4B at start, -512B at end) 194229537Sray * 195229537Sray * We have 512(secsize)*63(nsec) = 32256B at offset 1024 196229537Sray * From: 1024 bp->bio_offset = 1024 197229537Sray * To: 33280 bp->bio_length = 33280 - 1024 = 32256 198229537Sray * Compressed blocks: 0-1020, 1020-1080, 1080-4845, 4845-12444, 199229537Sray * 12444-33210, 33210-44100, ... 200229537Sray * 201229537Sray * Get start_blk from user request: 202229537Sray * start_blk = bp2->bio_offset / 65536 = 65540/65536 = 1 203229537Sray * bsize (block size of parent) = pp2->sectorsize (Now is 4B) 204229537Sray * pos(in stream from parent) = sc->offsets[start_blk] % bsize = 205229537Sray * = sc->offsets[1] % 4 = 1020 % 4 = 0 206229537Sray */ 207229537Sray 208229537Sray /* 209229537Sray * Uncompress data. 210229537Sray */ 211229537Sray start_blk = bp2->bio_offset / sc->blksz; 212229537Sray bsize = pp2->sectorsize; 213229537Sray pos = sc->offsets[start_blk] % bsize; 214229537Sray upos = 0; 215229537Sray 216229537Sray DPRINTF(("%s: done: bio_length %lld bio_completed %lld start_blk %d, " 217229537Sray "pos %lld, upos %lld (%lld, %d, %d)\n", 218229537Sray gp->name, bp->bio_length, bp->bio_completed, start_blk, pos, upos, 219229537Sray bp2->bio_offset, sc->blksz, bsize)); 220229537Sray 221229537Sray for (i = start_blk; upos < bp2->bio_length; i++) { 222229537Sray off_t len, dlen, ulen, uoff; 223229537Sray 224229537Sray uoff = i == start_blk ? bp2->bio_offset % sc->blksz : 0; 225229537Sray ulen = MIN(sc->blksz - uoff, bp2->bio_length - upos); 226229537Sray dlen = len = sc->offsets[i + 1] - sc->offsets[i]; 227229537Sray 228229537Sray DPRINTF(("%s: done: inflate block %d, start %lld, end %lld " 229229537Sray "len %lld\n", 230229537Sray gp->name, i, sc->offsets[i], sc->offsets[i + 1], len)); 231229537Sray 232229537Sray if (len == 0) { 233229537Sray /* All zero block: no cache update */ 234229537Sray bzero(bp2->bio_data + upos, ulen); 235229537Sray upos += ulen; 236229537Sray bp2->bio_completed += ulen; 237229537Sray continue; 238229537Sray } 239229537Sray 240229537Sray mtx_lock(&sc->last_mtx); 241229537Sray 242229537Sray#ifdef GEOM_UNCOMPRESS_DEBUG 243229537Sray if (g_debugflags & 32) 244229537Sray hexdump(bp->bio_data + pos, dlen, 0, 0); 245229537Sray#endif 246229537Sray 247229537Sray switch (sc->type) { 248229537Sray case GEOM_ULZMA: 249229537Sray sc->b->in = bp->bio_data + pos; 250229537Sray sc->b->out = sc->last_buf; 251229537Sray sc->b->in_pos = sc->b->out_pos = 0; 252229537Sray sc->b->in_size = dlen; 253229537Sray sc->b->out_size = (size_t)-1; 254229537Sray 255229537Sray err = (xz_dec_run(sc->s, sc->b) != XZ_STREAM_END) ? 256229537Sray 1 : 0; 257229537Sray /* TODO decoder recovery, if needed */ 258229537Sray break; 259229537Sray case GEOM_UZIP: 260229537Sray sc->zs->next_in = bp->bio_data + pos; 261229537Sray sc->zs->avail_in = dlen; 262229537Sray sc->zs->next_out = sc->last_buf; 263229537Sray sc->zs->avail_out = sc->blksz; 264229537Sray 265229537Sray err = (inflate(sc->zs, Z_FINISH) != Z_STREAM_END) ? 266229537Sray 1 : 0; 267229537Sray if ((err) && (inflateReset(sc->zs) != Z_OK)) 268229537Sray printf("%s: UZIP decoder reset failed\n", 269229537Sray gp->name); 270229537Sray break; 271229537Sray } 272229537Sray 273229537Sray if (err) { 274229537Sray sc->last_blk = -1; 275229537Sray mtx_unlock(&sc->last_mtx); 276229537Sray DPRINTF(("%s: done: inflate failed, code=%d\n", 277229537Sray gp->name, err)); 278229537Sray bp2->bio_error = EIO; 279229537Sray goto done; 280229537Sray } 281229537Sray 282229537Sray#ifdef GEOM_UNCOMPRESS_DEBUG 283229537Sray if (g_debugflags & 32) 284229537Sray hexdump(sc->last_buf, sc->b->out_size, 0, 0); 285229537Sray#endif 286229537Sray 287229537Sray sc->last_blk = i; 288229537Sray DPRINTF(("%s: done: inflated \n", gp->name)); 289229537Sray memcpy(bp2->bio_data + upos, sc->last_buf + uoff, ulen); 290229537Sray mtx_unlock(&sc->last_mtx); 291229537Sray 292229537Sray pos += len; 293229537Sray upos += ulen; 294229537Sray bp2->bio_completed += ulen; 295229537Sray } 296229537Sray 297229537Sraydone: 298229537Sray /* 299229537Sray * Finish processing the request. 300229537Sray */ 301229537Sray DPRINTF(("%s: done: (%d, %lld, %ld)\n", 302229537Sray gp->name, bp2->bio_error, bp2->bio_completed, bp2->bio_resid)); 303229537Sray free(bp->bio_data, M_GEOM_UNCOMPRESS); 304229537Sray g_destroy_bio(bp); 305229537Sray g_io_deliver(bp2, bp2->bio_error); 306229537Sray} 307229537Sray 308229537Sraystatic void 309229537Srayg_uncompress_start(struct bio *bp) 310229537Sray{ 311229537Sray struct g_uncompress_softc *sc; 312229537Sray struct g_provider *pp, *pp2; 313229537Sray struct g_consumer *cp; 314229537Sray struct g_geom *gp; 315229537Sray struct bio *bp2; 316229537Sray uint32_t start_blk, end_blk; 317229537Sray size_t bsize; 318229537Sray 319229537Sray 320229537Sray pp = bp->bio_to; 321229537Sray gp = pp->geom; 322229537Sray DPRINTF(("%s: start (%s) to %s off=%lld len=%lld\n", gp->name, 323229537Sray (bp->bio_cmd==BIO_READ) ? "BIO_READ" : "BIO_WRITE*", 324229537Sray pp->name, bp->bio_offset, bp->bio_length)); 325229537Sray 326229537Sray if (bp->bio_cmd != BIO_READ) { 327229537Sray g_io_deliver(bp, EOPNOTSUPP); 328229537Sray return; 329229537Sray } 330229537Sray 331229537Sray cp = LIST_FIRST(&gp->consumer); 332229537Sray pp2 = cp->provider; 333229537Sray sc = gp->softc; 334229537Sray 335229537Sray start_blk = bp->bio_offset / sc->blksz; 336229537Sray end_blk = howmany(bp->bio_offset + bp->bio_length, sc->blksz); 337229537Sray KASSERT(start_blk < sc->nblocks, 338229537Sray ("start_blk out of range")); 339229537Sray KASSERT(end_blk <= sc->nblocks, 340229537Sray ("end_blk out of range")); 341229537Sray 342229537Sray sc->req_total++; 343229537Sray if (start_blk + 1 == end_blk) { 344229537Sray mtx_lock(&sc->last_mtx); 345229537Sray if (start_blk == sc->last_blk) { 346229537Sray off_t uoff; 347229537Sray 348229537Sray uoff = bp->bio_offset % sc->blksz; 349229537Sray KASSERT(bp->bio_length <= sc->blksz - uoff, 350229537Sray ("cached data error")); 351229537Sray memcpy(bp->bio_data, sc->last_buf + uoff, 352229537Sray bp->bio_length); 353229537Sray sc->req_cached++; 354229537Sray mtx_unlock(&sc->last_mtx); 355229537Sray 356229537Sray DPRINTF(("%s: start: cached 0 + %lld, " 357229537Sray "%lld + 0 + %lld\n", 358229537Sray gp->name, bp->bio_length, uoff, bp->bio_length)); 359229537Sray bp->bio_completed = bp->bio_length; 360229537Sray g_io_deliver(bp, 0); 361229537Sray return; 362229537Sray } 363229537Sray mtx_unlock(&sc->last_mtx); 364229537Sray } 365229537Sray 366229537Sray bp2 = g_clone_bio(bp); 367229537Sray if (bp2 == NULL) { 368229537Sray g_io_deliver(bp, ENOMEM); 369229537Sray return; 370229537Sray } 371229537Sray DPRINTF(("%s: start (%d..%d), %s: %d + %llu, %s: %d + %llu\n", 372229537Sray gp->name, start_blk, end_blk, 373229537Sray pp->name, pp->sectorsize, pp->mediasize, 374229537Sray pp2->name, pp2->sectorsize, pp2->mediasize)); 375229537Sray 376229537Sray bsize = pp2->sectorsize; 377229537Sray 378229537Sray bp2->bio_done = g_uncompress_done; 379229537Sray bp2->bio_offset = rounddown(sc->offsets[start_blk],bsize); 380229537Sray bp2->bio_length = roundup(sc->offsets[end_blk],bsize) - 381229537Sray bp2->bio_offset; 382229537Sray bp2->bio_data = malloc(bp2->bio_length, M_GEOM_UNCOMPRESS, M_NOWAIT); 383229537Sray 384229537Sray DPRINTF(("%s: start %lld + %lld -> %lld + %lld -> %lld + %lld\n", 385229537Sray gp->name, 386229537Sray bp->bio_offset, bp->bio_length, 387229537Sray sc->offsets[start_blk], 388229537Sray sc->offsets[end_blk] - sc->offsets[start_blk], 389229537Sray bp2->bio_offset, bp2->bio_length)); 390229537Sray 391229537Sray if (bp2->bio_data == NULL) { 392229537Sray g_destroy_bio(bp2); 393229537Sray g_io_deliver(bp, ENOMEM); 394229537Sray return; 395229537Sray } 396229537Sray 397229537Sray g_io_request(bp2, cp); 398229537Sray DPRINTF(("%s: start ok\n", gp->name)); 399229537Sray} 400229537Sray 401229537Sraystatic void 402229537Srayg_uncompress_orphan(struct g_consumer *cp) 403229537Sray{ 404229537Sray struct g_geom *gp; 405229537Sray 406229537Sray g_trace(G_T_TOPOLOGY, "%s(%p/%s)", __func__, cp, 407229537Sray cp->provider->name); 408229537Sray g_topology_assert(); 409229537Sray 410229537Sray gp = cp->geom; 411229537Sray g_uncompress_softc_free(gp->softc, gp); 412229537Sray gp->softc = NULL; 413249148Smav g_wither_geom(gp, ENXIO); 414229537Sray} 415229537Sray 416229537Sraystatic int 417229537Srayg_uncompress_access(struct g_provider *pp, int dr, int dw, int de) 418229537Sray{ 419229537Sray struct g_consumer *cp; 420229537Sray struct g_geom *gp; 421229537Sray 422229537Sray gp = pp->geom; 423229537Sray cp = LIST_FIRST(&gp->consumer); 424229537Sray KASSERT (cp != NULL, ("g_uncompress_access but no consumer")); 425229537Sray 426229537Sray if (cp->acw + dw > 0) 427229537Sray return (EROFS); 428229537Sray 429229537Sray return (g_access(cp, dr, dw, de)); 430229537Sray} 431229537Sray 432229537Sraystatic void 433229537Srayg_uncompress_spoiled(struct g_consumer *cp) 434229537Sray{ 435229537Sray struct g_geom *gp; 436229537Sray 437229537Sray gp = cp->geom; 438229537Sray g_trace(G_T_TOPOLOGY, "%s(%p/%s)", __func__, cp, gp->name); 439229537Sray g_topology_assert(); 440229537Sray 441229537Sray g_uncompress_softc_free(gp->softc, gp); 442229537Sray gp->softc = NULL; 443229537Sray g_wither_geom(gp, ENXIO); 444229537Sray} 445229537Sray 446229537Sraystatic struct g_geom * 447229537Srayg_uncompress_taste(struct g_class *mp, struct g_provider *pp, int flags) 448229537Sray{ 449229537Sray struct cloop_header *header; 450229537Sray struct g_uncompress_softc *sc; 451229537Sray struct g_provider *pp2; 452229537Sray struct g_consumer *cp; 453229537Sray struct g_geom *gp; 454229537Sray uint32_t i, total_offsets, offsets_read, type; 455229537Sray uint8_t *buf; 456229537Sray int error; 457229537Sray 458229537Sray g_trace(G_T_TOPOLOGY, "%s(%s,%s)", __func__, mp->name, pp->name); 459229537Sray g_topology_assert(); 460229537Sray 461229537Sray /* Skip providers that are already open for writing. */ 462229537Sray if (pp->acw > 0) 463229537Sray return (NULL); 464229537Sray 465229537Sray buf = NULL; 466229537Sray 467229537Sray /* 468229537Sray * Create geom instance. 469229537Sray */ 470229537Sray gp = g_new_geomf(mp, "%s.uncompress", pp->name); 471229537Sray cp = g_new_consumer(gp); 472229537Sray error = g_attach(cp, pp); 473229537Sray if (error == 0) 474229537Sray error = g_access(cp, 1, 0, 0); 475229537Sray if (error) { 476229537Sray g_detach(cp); 477229537Sray g_destroy_consumer(cp); 478229537Sray g_destroy_geom(gp); 479229537Sray return (NULL); 480229537Sray } 481229537Sray g_topology_unlock(); 482229537Sray 483229537Sray /* 484229537Sray * Read cloop header, look for CLOOP magic, perform 485229537Sray * other validity checks. 486229537Sray */ 487229537Sray DPRINTF(("%s: media sectorsize %u, mediasize %lld\n", 488229537Sray gp->name, pp->sectorsize, pp->mediasize)); 489229537Sray 490229537Sray i = roundup(sizeof(struct cloop_header), pp->sectorsize); 491229537Sray buf = g_read_data(cp, 0, i, NULL); 492229537Sray if (buf == NULL) 493229537Sray goto err; 494229537Sray 495229537Sray header = (struct cloop_header *) buf; 496229537Sray if (strncmp(header->magic, CLOOP_MAGIC_START, 497229537Sray sizeof(CLOOP_MAGIC_START) - 1) != 0) { 498229537Sray DPRINTF(("%s: no CLOOP magic\n", gp->name)); 499229537Sray goto err; 500229537Sray } 501229537Sray 502229537Sray switch (header->magic[0x0b]) { 503229537Sray case 'L': 504229537Sray type = GEOM_ULZMA; 505229537Sray if (header->magic[0x0c] < GEOM_ULZMA_MAJVER) { 506229537Sray DPRINTF(("%s: image version too old\n", gp->name)); 507229537Sray goto err; 508229537Sray } 509229537Sray printf("%s: GEOM_ULZMA image found\n", gp->name); 510229537Sray break; 511229537Sray case 'V': 512229537Sray type = GEOM_UZIP; 513229537Sray if (header->magic[0x0c] < GEOM_UZIP_MAJVER) { 514229537Sray DPRINTF(("%s: image version too old\n", gp->name)); 515229537Sray goto err; 516229537Sray } 517229537Sray printf("%s: GEOM_UZIP image found\n", gp->name); 518229537Sray break; 519229537Sray default: 520229537Sray DPRINTF(("%s: unsupported image type\n", gp->name)); 521229537Sray goto err; 522229537Sray } 523229537Sray 524229537Sray DPRINTF(("%s: found CLOOP magic\n", gp->name)); 525229537Sray /* 526229537Sray * Initialize softc and read offsets. 527229537Sray */ 528229537Sray sc = malloc(sizeof(*sc), M_GEOM_UNCOMPRESS, M_WAITOK | M_ZERO); 529229537Sray gp->softc = sc; 530229537Sray sc->type = type; 531229537Sray sc->blksz = ntohl(header->blksz); 532229537Sray sc->nblocks = ntohl(header->nblocks); 533229537Sray if (sc->blksz % 4 != 0) { 534229537Sray printf("%s: block size (%u) should be multiple of 4.\n", 535229537Sray gp->name, sc->blksz); 536229537Sray goto err; 537229537Sray } 538229537Sray if (sc->blksz > MAX_BLKSZ) { 539229537Sray printf("%s: block size (%u) should not be larger than %d.\n", 540229537Sray gp->name, sc->blksz, MAX_BLKSZ); 541229537Sray } 542229537Sray total_offsets = sc->nblocks + 1; 543229537Sray if (sizeof(struct cloop_header) + 544229537Sray total_offsets * sizeof(uint64_t) > pp->mediasize) { 545229537Sray printf("%s: media too small for %u blocks\n", 546229537Sray gp->name, sc->nblocks); 547229537Sray goto err; 548229537Sray } 549229537Sray sc->offsets = malloc( 550229537Sray total_offsets * sizeof(uint64_t), M_GEOM_UNCOMPRESS, M_WAITOK); 551229537Sray offsets_read = MIN(total_offsets, 552229537Sray (pp->sectorsize - sizeof(*header)) / sizeof(uint64_t)); 553229537Sray for (i = 0; i < offsets_read; i++) 554229537Sray sc->offsets[i] = be64toh(((uint64_t *) (header + 1))[i]); 555229537Sray DPRINTF(("%s: %u offsets in the first sector\n", 556229537Sray gp->name, offsets_read)); 557229537Sray 558229537Sray free(buf, M_GEOM); 559229537Sray i = roundup((sizeof(struct cloop_header) + 560229537Sray total_offsets * sizeof(uint64_t)),pp->sectorsize); 561229537Sray buf = g_read_data(cp, 0, i, NULL); 562229537Sray if (buf == NULL) 563229537Sray goto err; 564229537Sray for (i = 0; i <= total_offsets; i++) { 565229537Sray sc->offsets[i] = be64toh(((uint64_t *) 566229537Sray (buf+sizeof(struct cloop_header)))[i]); 567229537Sray } 568229537Sray DPRINTF(("%s: done reading offsets\n", gp->name)); 569229537Sray mtx_init(&sc->last_mtx, "geom_uncompress cache", NULL, MTX_DEF); 570229537Sray sc->last_blk = -1; 571229537Sray sc->last_buf = malloc(sc->blksz, M_GEOM_UNCOMPRESS, M_WAITOK); 572229537Sray sc->req_total = 0; 573229537Sray sc->req_cached = 0; 574229537Sray 575229537Sray switch (sc->type) { 576229537Sray case GEOM_ULZMA: 577229537Sray xz_crc32_init(); 578229537Sray sc->s = xz_dec_init(XZ_SINGLE, 0); 579229537Sray sc->b = (struct xz_buf*)malloc(sizeof(struct xz_buf), 580229537Sray M_GEOM_UNCOMPRESS, M_WAITOK); 581229537Sray break; 582229537Sray case GEOM_UZIP: 583229537Sray sc->zs = (z_stream *)malloc(sizeof(z_stream), 584229537Sray M_GEOM_UNCOMPRESS, M_WAITOK); 585229537Sray sc->zs->zalloc = z_alloc; 586229537Sray sc->zs->zfree = z_free; 587229537Sray if (inflateInit(sc->zs) != Z_OK) { 588229537Sray goto err; 589229537Sray } 590229537Sray break; 591229537Sray } 592229537Sray 593229537Sray g_topology_lock(); 594229537Sray pp2 = g_new_providerf(gp, "%s", gp->name); 595229537Sray pp2->sectorsize = 512; 596229537Sray pp2->mediasize = (off_t)sc->nblocks * sc->blksz; 597229537Sray pp2->flags = pp->flags & G_PF_CANDELETE; 598229537Sray if (pp->stripesize > 0) { 599229537Sray pp2->stripesize = pp->stripesize; 600229537Sray pp2->stripeoffset = pp->stripeoffset; 601229537Sray } 602229537Sray g_error_provider(pp2, 0); 603229537Sray free(buf, M_GEOM); 604229537Sray g_access(cp, -1, 0, 0); 605229537Sray 606229537Sray DPRINTF(("%s: taste ok (%d, %lld), (%d, %d), %x\n", 607229537Sray gp->name, 608229537Sray pp2->sectorsize, pp2->mediasize, 609229537Sray pp2->stripeoffset, pp2->stripesize, pp2->flags)); 610229537Sray printf("%s: %u x %u blocks\n", 611229537Sray gp->name, sc->nblocks, sc->blksz); 612229537Sray return (gp); 613229537Sray 614229537Srayerr: 615229537Sray g_topology_lock(); 616229537Sray g_access(cp, -1, 0, 0); 617229537Sray if (buf != NULL) 618229537Sray free(buf, M_GEOM); 619229537Sray if (gp->softc != NULL) { 620229537Sray g_uncompress_softc_free(gp->softc, NULL); 621229537Sray gp->softc = NULL; 622229537Sray } 623229537Sray g_detach(cp); 624229537Sray g_destroy_consumer(cp); 625229537Sray g_destroy_geom(gp); 626229537Sray return (NULL); 627229537Sray} 628229537Sray 629229537Sraystatic int 630229537Srayg_uncompress_destroy_geom(struct gctl_req *req, struct g_class *mp, 631229537Sray struct g_geom *gp) 632229537Sray{ 633229537Sray struct g_provider *pp; 634229537Sray 635229537Sray g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, gp->name); 636229537Sray g_topology_assert(); 637229537Sray 638229537Sray if (gp->softc == NULL) { 639229537Sray printf("%s(%s): gp->softc == NULL\n", __func__, gp->name); 640229537Sray return (ENXIO); 641229537Sray } 642229537Sray 643229537Sray KASSERT(gp != NULL, ("NULL geom")); 644229537Sray pp = LIST_FIRST(&gp->provider); 645229537Sray KASSERT(pp != NULL, ("NULL provider")); 646229537Sray if (pp->acr > 0 || pp->acw > 0 || pp->ace > 0) 647229537Sray return (EBUSY); 648229537Sray 649229537Sray g_uncompress_softc_free(gp->softc, gp); 650229537Sray gp->softc = NULL; 651229537Sray g_wither_geom(gp, ENXIO); 652229537Sray return (0); 653229537Sray} 654229537Sray 655229537Sraystatic struct g_class g_uncompress_class = { 656229537Sray .name = UNCOMPRESS_CLASS_NAME, 657229537Sray .version = G_VERSION, 658229537Sray .taste = g_uncompress_taste, 659229537Sray .destroy_geom = g_uncompress_destroy_geom, 660229537Sray 661229537Sray .start = g_uncompress_start, 662229537Sray .orphan = g_uncompress_orphan, 663229537Sray .access = g_uncompress_access, 664229537Sray .spoiled = g_uncompress_spoiled, 665229537Sray}; 666229537Sray 667229537SrayDECLARE_GEOM_CLASS(g_uncompress_class, g_uncompress); 668229537Sray 669