Add geom_uzip -- geom class that implements read-only compressed disks.
Currently supports cloop V2.0 disk compression format. May support more formats in future.
This commit is contained in:
parent
b5bb945eef
commit
75261008d7
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=133640
@ -132,6 +132,7 @@ options GEOM_NOP # Test class.
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options GEOM_PC98 # NEC PC9800 partitioning
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options GEOM_STRIPE # Disk striping.
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options GEOM_SUNLABEL # Sun/Solaris partitioning
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options GEOM_UZIP # Read-only compressed disks
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options GEOM_VOL # Volume names from UFS superblock
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#
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@ -949,6 +949,7 @@ geom/mirror/g_mirror.c optional geom_mirror
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geom/mirror/g_mirror_ctl.c optional geom_mirror
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geom/nop/g_nop.c optional geom_nop
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geom/stripe/g_stripe.c optional geom_stripe
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geom/uzip/g_uzip.c optional geom_uzip
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geom/geom_aes.c optional geom_aes
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geom/geom_apple.c optional geom_apple
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geom/geom_bsd.c optional geom_bsd
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@ -1274,6 +1275,7 @@ net/slcompress.c optional sppp
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net/zlib.c optional ppp_deflate
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net/zlib.c optional ipsec
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net/zlib.c optional crypto
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net/zlib.c optional geom_uzip
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net80211/ieee80211.c optional wlan
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net80211/ieee80211_crypto.c optional wlan
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net80211/ieee80211_input.c optional wlan
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@ -82,6 +82,7 @@ GEOM_NOP opt_geom.h
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GEOM_PC98 opt_geom.h
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GEOM_STRIPE opt_geom.h
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GEOM_SUNLABEL opt_geom.h
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GEOM_UZIP opt_geom.h
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GEOM_VOL opt_geom.h
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HW_WDOG
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KSTACK_MAX_PAGES
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521
sys/geom/uzip/g_uzip.c
Normal file
521
sys/geom/uzip/g_uzip.c
Normal file
@ -0,0 +1,521 @@
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/*-
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* Copyright (c) 2004 Max Khon
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bio.h>
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#include <sys/endian.h>
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#include <sys/errno.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <geom/geom.h>
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#include <net/zlib.h>
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#undef GEOM_UZIP_DEBUG
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#ifdef GEOM_UZIP_DEBUG
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#define DPRINTF(a) printf a
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#else
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#define DPRINTF(a)
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#endif
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MALLOC_DEFINE(M_GEOM_UZIP, "GEOM UZIP", "GEOM UZIP data structures");
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#define UZIP_CLASS_NAME "UZIP"
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/*
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* Maximum allowed valid block size (to prevent foot-shooting)
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*/
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#define MAX_BLKSZ (MAXPHYS - MAXPHYS / 1000 - 12)
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/*
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* Integer values (block size, number of blocks, offsets)
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* are stored in big-endian (network) order on disk and struct cloop_header
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* and in native order in struct g_uzip_softc
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*/
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#define CLOOP_MAGIC_LEN 128
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static char CLOOP_MAGIC_START[] = "#!/bin/sh\n";
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struct cloop_header {
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char magic[CLOOP_MAGIC_LEN]; /* cloop magic */
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uint32_t blksz; /* block size */
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uint32_t nblocks; /* number of blocks */
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};
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struct g_uzip_softc {
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uint32_t blksz; /* block size */
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uint32_t nblocks; /* number of blocks */
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uint64_t *offsets;
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struct mtx last_mtx;
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uint32_t last_blk; /* last blk no */
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char *last_buf; /* last blk data */
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int req_total; /* total requests */
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int req_cached; /* cached requests */
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};
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static void
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g_uzip_softc_free(struct g_uzip_softc *sc, struct g_geom *gp)
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{
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if (gp != NULL) {
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printf("%s: %d requests, %d cached\n",
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gp->name, sc->req_total, sc->req_cached);
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}
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if (sc->offsets != NULL)
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free(sc->offsets, M_GEOM_UZIP);
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mtx_destroy(&sc->last_mtx);
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free(sc->last_buf, M_GEOM_UZIP);
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free(sc, M_GEOM_UZIP);
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}
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static void *
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z_alloc(void *nil, u_int type, u_int size)
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{
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void *ptr;
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ptr = malloc(type * size, M_GEOM_UZIP, M_NOWAIT);
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return ptr;
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}
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static void
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z_free(void *nil, void *ptr)
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{
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free(ptr, M_GEOM_UZIP);
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}
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static void
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g_uzip_done(struct bio *bp)
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{
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int err;
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struct bio *bp2;
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z_stream zs;
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struct g_provider *pp, *pp2;
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struct g_consumer *cp;
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struct g_geom *gp;
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struct g_uzip_softc *sc;
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off_t pos, upos;
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uint32_t start_blk, i;
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size_t bsize;
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bp2 = bp->bio_parent;
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pp = bp2->bio_to;
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gp = pp->geom;
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cp = LIST_FIRST(&gp->consumer);
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pp2 = cp->provider;
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sc = gp->softc;
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DPRINTF(("%s: done\n", gp->name));
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bp2->bio_error = bp->bio_error;
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if (bp2->bio_error != 0)
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goto done;
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/*
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* Uncompress data.
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*/
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zs.zalloc = z_alloc;
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zs.zfree = z_free;
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err = inflateInit(&zs);
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if (err != Z_OK) {
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bp2->bio_error = EIO;
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goto done;
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}
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start_blk = bp2->bio_offset / sc->blksz;
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bsize = pp2->sectorsize;
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pos = sc->offsets[start_blk] % bsize;
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upos = 0;
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DPRINTF(("%s: done: start_blk %d, pos %lld, upos %lld (%lld, %d, %d)\n",
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gp->name, start_blk, pos, upos,
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bp2->bio_offset, sc->blksz, bsize));
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for (i = start_blk; upos < bp2->bio_length; i++) {
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off_t len, ulen, uoff;
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uoff = i == start_blk ? bp2->bio_offset % sc->blksz : 0;
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ulen = MIN(sc->blksz - uoff, bp2->bio_length - upos);
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len = sc->offsets[i + 1] - sc->offsets[i];
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zs.next_in = bp->bio_data + pos;
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zs.avail_in = len;
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zs.next_out = sc->last_buf;
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zs.avail_out = sc->blksz;
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mtx_lock(&sc->last_mtx);
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err = inflate(&zs, Z_FINISH);
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if (err != Z_STREAM_END) {
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sc->last_blk = -1;
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mtx_unlock(&sc->last_mtx);
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DPRINTF(("%s: done: inflate failed (%lld + %lld -> %lld + %lld + %lld)\n",
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gp->name, pos, len, uoff, upos, ulen));
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inflateEnd(&zs);
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bp2->bio_error = EIO;
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goto done;
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}
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sc->last_blk = i;
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DPRINTF(("%s: done: inflated %lld + %lld -> %lld + %lld + %lld\n",
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gp->name,
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pos, len,
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uoff, upos, ulen));
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memcpy(bp2->bio_data + upos, sc->last_buf + uoff, ulen);
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mtx_unlock(&sc->last_mtx);
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pos += len;
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upos += ulen;
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bp2->bio_completed += ulen;
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err = inflateReset(&zs);
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if (err != Z_OK) {
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inflateEnd(&zs);
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bp2->bio_error = EIO;
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goto done;
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}
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}
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err = inflateEnd(&zs);
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if (err != Z_OK) {
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bp2->bio_error = EIO;
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goto done;
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}
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done:
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/*
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* Finish processing the request.
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*/
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DPRINTF(("%s: done: (%d, %lld, %ld)\n",
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gp->name, bp2->bio_error, bp2->bio_completed, bp2->bio_resid));
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free(bp->bio_data, M_GEOM_UZIP);
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g_destroy_bio(bp);
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g_io_deliver(bp2, bp2->bio_error);
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}
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static void
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g_uzip_start(struct bio *bp)
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{
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struct bio *bp2;
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struct g_provider *pp, *pp2;
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struct g_geom *gp;
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struct g_consumer *cp;
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struct g_uzip_softc *sc;
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uint32_t start_blk, end_blk;
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size_t bsize;
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pp = bp->bio_to;
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gp = pp->geom;
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DPRINTF(("%s: start (%d)\n", gp->name, bp->bio_cmd));
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if (bp->bio_cmd != BIO_READ) {
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g_io_deliver(bp, EOPNOTSUPP);
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return;
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}
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cp = LIST_FIRST(&gp->consumer);
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pp2 = cp->provider;
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sc = gp->softc;
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start_blk = bp->bio_offset / sc->blksz;
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end_blk = (bp->bio_offset + bp->bio_length + sc->blksz - 1) / sc->blksz;
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KASSERT(start_blk <= sc->nblocks,
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("start_blk out of range"));
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KASSERT(end_blk < sc->nblocks,
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("end_blk out of range"));
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sc->req_total++;
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if (start_blk + 1 == end_blk) {
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mtx_lock(&sc->last_mtx);
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if (start_blk == sc->last_blk) {
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off_t uoff;
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uoff = bp->bio_offset % sc->blksz;
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KASSERT(bp->bio_length <= sc->blksz - uoff,
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("cached data error"));
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memcpy(bp->bio_data, sc->last_buf + uoff,
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bp->bio_length);
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sc->req_cached++;
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mtx_unlock(&sc->last_mtx);
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DPRINTF(("%s: start: cached 0 + %lld, %lld + 0 + %lld\n",
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gp->name, bp->bio_length, uoff, bp->bio_length));
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bp->bio_completed = bp->bio_length;
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g_io_deliver(bp, 0);
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return;
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}
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mtx_unlock(&sc->last_mtx);
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}
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bp2 = g_clone_bio(bp);
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if (bp2 == NULL) {
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g_io_deliver(bp, ENOMEM);
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return;
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}
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bp2->bio_done = g_uzip_done;
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DPRINTF(("%s: start (%d..%d), %s: %d + %lld, %s: %d + %lld\n",
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gp->name, start_blk, end_blk,
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pp->name, pp->sectorsize, pp->mediasize,
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pp2->name, pp2->sectorsize, pp2->mediasize));
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bsize = pp2->sectorsize;
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bp2->bio_offset = sc->offsets[start_blk] - sc->offsets[start_blk] % bsize;
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bp2->bio_length = sc->offsets[end_blk] - bp2->bio_offset;
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bp2->bio_length = (bp2->bio_length + bsize - 1) / bsize * bsize;
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DPRINTF(("%s: start %lld + %lld -> %lld + %lld -> %lld + %lld\n",
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gp->name,
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bp->bio_offset, bp->bio_length,
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sc->offsets[start_blk], sc->offsets[end_blk] - sc->offsets[start_blk],
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bp2->bio_offset, bp2->bio_length));
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bp2->bio_data = malloc(bp2->bio_length, M_GEOM_UZIP, M_NOWAIT);
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if (bp2->bio_data == NULL) {
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g_io_deliver(bp, ENOMEM);
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return;
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}
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g_io_request(bp2, cp);
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DPRINTF(("%s: start ok\n", gp->name));
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}
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static void
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g_uzip_orphan(struct g_consumer *cp)
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{
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struct g_geom *gp;
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g_trace(G_T_TOPOLOGY, "g_uzip_orphan(%p/%s)", cp, cp->provider->name);
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g_topology_assert();
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KASSERT(cp->provider->error != 0,
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("g_uzip_orphan with error == 0"));
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gp = cp->geom;
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g_uzip_softc_free(gp->softc, gp);
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gp->softc = NULL;
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g_wither_geom(gp, cp->provider->error);
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}
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static int
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g_uzip_access(struct g_provider *pp, int dr, int dw, int de)
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{
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struct g_geom *gp;
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struct g_consumer *cp;
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gp = pp->geom;
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cp = LIST_FIRST(&gp->consumer);
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KASSERT (cp != NULL, ("g_uzip_access but no consumer"));
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return (g_access(cp, dr, dw, de));
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}
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static void
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g_uzip_spoiled(struct g_consumer *cp)
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{
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struct g_geom *gp;
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gp = cp->geom;
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g_trace(G_T_TOPOLOGY, "g_uzip_spoiled(%p/%s)", cp, gp->name);
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g_topology_assert();
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g_uzip_softc_free(gp->softc, gp);
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gp->softc = NULL;
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g_wither_geom(gp, ENXIO);
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}
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static struct g_geom *
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g_uzip_taste(struct g_class *mp, struct g_provider *pp, int flags)
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{
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int error;
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uint32_t i, total_offsets, offsets_read, blk;
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void *buf;
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struct cloop_header *header;
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struct g_consumer *cp;
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struct g_geom *gp;
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struct g_provider *pp2;
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struct g_uzip_softc *sc;
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g_trace(G_T_TOPOLOGY, "g_uzip_taste(%s,%s)", mp->name, pp->name);
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g_topology_assert();
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buf = NULL;
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/*
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* Create geom instance.
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*/
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gp = g_new_geomf(mp, "%s.uzip", pp->name);
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cp = g_new_consumer(gp);
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error = g_attach(cp, pp);
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if (error == 0)
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error = g_access(cp, 1, 0, 0);
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if (error) {
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g_detach(cp);
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g_destroy_consumer(cp);
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g_destroy_geom(gp);
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return (NULL);
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}
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g_topology_unlock();
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/*
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* Read cloop header, look for CLOOP magic, perform
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* other validity checks.
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*/
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DPRINTF(("%s: media sectorsize %u, mediasize %lld\n",
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gp->name, pp->sectorsize, pp->mediasize));
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buf = g_read_data(cp, 0, pp->sectorsize, &error);
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if (buf == NULL || error != 0)
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goto err;
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header = (struct cloop_header *) buf;
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if (strncmp(header->magic, CLOOP_MAGIC_START,
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sizeof(CLOOP_MAGIC_START) - 1) != 0) {
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DPRINTF(("%s: no CLOOP magic\n", gp->name));
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goto err;
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}
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if (header->magic[0x0b] != 'V' || header->magic[0x0c] < '2') {
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DPRINTF(("%s: image version too old\n", gp->name));
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goto err;
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}
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/*
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* Initialize softc and read offsets.
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*/
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sc = malloc(sizeof(*sc), M_GEOM_UZIP, M_WAITOK);
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gp->softc = sc;
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sc->blksz = ntohl(header->blksz);
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sc->nblocks = ntohl(header->nblocks);
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if (sc->blksz % 512 != 0) {
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printf("%s: block size (%u) should be multiple of 512.\n",
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gp->name, sc->blksz);
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goto err;
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}
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if (sc->blksz > MAX_BLKSZ) {
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printf("%s: block size (%u) should not be larger than %d.\n",
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gp->name, sc->blksz, MAX_BLKSZ);
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}
|
||||
total_offsets = sc->nblocks + 1;
|
||||
if (sizeof(struct cloop_header) +
|
||||
total_offsets * sizeof(uint64_t) > pp->mediasize) {
|
||||
printf("%s: media too small for %u blocks\n",
|
||||
gp->name, sc->nblocks);
|
||||
goto err;
|
||||
}
|
||||
sc->offsets = malloc(
|
||||
total_offsets * sizeof(uint64_t), M_GEOM_UZIP, M_WAITOK);
|
||||
offsets_read = MIN(total_offsets,
|
||||
(pp->sectorsize - sizeof(*header)) / sizeof(uint64_t));
|
||||
for (i = 0; i < offsets_read; i++)
|
||||
sc->offsets[i] = be64toh(((uint64_t *) (header + 1))[i]);
|
||||
DPRINTF(("%s: %u offsets in the first sector\n",
|
||||
gp->name, offsets_read));
|
||||
for (blk = 1; offsets_read < total_offsets; blk++) {
|
||||
uint32_t nread;
|
||||
|
||||
free(buf, M_GEOM_UZIP);
|
||||
buf = g_read_data(
|
||||
cp, blk * pp->sectorsize, pp->sectorsize, &error);
|
||||
if (buf == NULL || error != 0)
|
||||
goto err;
|
||||
nread = MIN(total_offsets - offsets_read,
|
||||
pp->sectorsize / sizeof(uint64_t));
|
||||
DPRINTF(("%s: %u offsets read from sector %d\n",
|
||||
gp->name, nread, blk));
|
||||
for (i = 0; i < nread; i++) {
|
||||
sc->offsets[offsets_read + i] =
|
||||
be64toh(((uint64_t *) buf)[i]);
|
||||
}
|
||||
offsets_read += nread;
|
||||
}
|
||||
DPRINTF(("%s: done reading offsets\n", gp->name));
|
||||
mtx_init(&sc->last_mtx, "geom_uzip cache", NULL, MTX_DEF);
|
||||
sc->last_blk = -1;
|
||||
sc->last_buf = malloc(sc->blksz, M_GEOM_UZIP, M_WAITOK);
|
||||
sc->req_total = 0;
|
||||
sc->req_cached = 0;
|
||||
|
||||
g_topology_lock();
|
||||
pp2 = g_new_providerf(gp, "%s", gp->name);
|
||||
pp2->sectorsize = 512;
|
||||
pp2->mediasize = sc->nblocks * sc->blksz;
|
||||
pp2->flags = pp->flags & G_PF_CANDELETE;
|
||||
if (pp->stripesize > 0) {
|
||||
pp2->stripesize = pp->stripesize;
|
||||
pp2->stripeoffset = pp->stripeoffset;
|
||||
}
|
||||
g_error_provider(pp2, 0);
|
||||
g_access(cp, -1, 0, 0);
|
||||
|
||||
DPRINTF(("%s: taste ok (%d, %lld), (%d, %d), %x\n",
|
||||
gp->name,
|
||||
pp2->sectorsize, pp2->mediasize,
|
||||
pp2->stripeoffset, pp2->stripesize, pp2->flags));
|
||||
printf("%s: %u x %u blocks\n",
|
||||
gp->name, sc->nblocks, sc->blksz);
|
||||
return (gp);
|
||||
|
||||
err:
|
||||
g_topology_lock();
|
||||
g_access(cp, -1, 0, 0);
|
||||
if (buf != NULL)
|
||||
free(buf, M_GEOM_UZIP);
|
||||
if (gp->softc != NULL) {
|
||||
g_uzip_softc_free(gp->softc, NULL);
|
||||
gp->softc = NULL;
|
||||
}
|
||||
g_detach(cp);
|
||||
g_destroy_consumer(cp);
|
||||
g_destroy_geom(gp);
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
static int
|
||||
g_uzip_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp)
|
||||
{
|
||||
struct g_provider *pp;
|
||||
|
||||
g_trace(G_T_TOPOLOGY, "g_uzip_destroy_geom(%s, %s)", mp->name, gp->name);
|
||||
g_topology_assert();
|
||||
|
||||
if (gp->softc == NULL) {
|
||||
printf("%s(%s): gp->softc == NULL\n", __func__, gp->name);
|
||||
return (ENXIO);
|
||||
}
|
||||
|
||||
KASSERT(gp != NULL, ("NULL geom"));
|
||||
pp = LIST_FIRST(&gp->provider);
|
||||
KASSERT(pp != NULL, ("NULL provider"));
|
||||
if (pp->acr > 0 || pp->acw > 0 || pp->ace > 0)
|
||||
return (EBUSY);
|
||||
|
||||
g_uzip_softc_free(gp->softc, gp);
|
||||
gp->softc = NULL;
|
||||
g_wither_geom(gp, ENXIO);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static struct g_class g_uzip_class = {
|
||||
.name = UZIP_CLASS_NAME,
|
||||
.version = G_VERSION,
|
||||
.taste = g_uzip_taste,
|
||||
.destroy_geom = g_uzip_destroy_geom,
|
||||
|
||||
.start = g_uzip_start,
|
||||
.orphan = g_uzip_orphan,
|
||||
.access = g_uzip_access,
|
||||
.spoiled = g_uzip_spoiled,
|
||||
};
|
||||
|
||||
DECLARE_GEOM_CLASS(g_uzip_class, g_uzip);
|
@ -15,6 +15,7 @@ SUBDIR= geom_apple \
|
||||
geom_pc98 \
|
||||
geom_stripe \
|
||||
geom_sunlabel \
|
||||
geom_uzip \
|
||||
geom_vinum \
|
||||
geom_vol_ffs
|
||||
|
||||
|
9
sys/modules/geom/geom_uzip/Makefile
Normal file
9
sys/modules/geom/geom_uzip/Makefile
Normal file
@ -0,0 +1,9 @@
|
||||
# $FreeBSD$
|
||||
|
||||
.PATH: ${.CURDIR}/../../../geom/uzip ${.CURDIR}/../../../net
|
||||
|
||||
KMOD= geom_uzip
|
||||
SRCS= g_uzip.c zlib.c
|
||||
#CFLAGS= -g
|
||||
|
||||
.include <bsd.kmod.mk>
|
Loading…
Reference in New Issue
Block a user