- Fix for possible unset uid/gid in toproto - Fix for default mtree style - Update libelf - Importing libexecinfo - Resynchronize GCC, mpc, gmp, mpfr - build.sh: Replace params with show-params. This has been done as the make target has been renamed in the same way, while a new target named params has been added. This new target generates a file containing all the parameters, instead of printing it on the console. - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org) get getservbyport() out of the inner loop Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
257 lines
7.5 KiB
C
257 lines
7.5 KiB
C
/* $NetBSD: chfs_wbuf.c,v 1.5 2012/10/19 12:44:39 ttoth Exp $ */
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/*-
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* Copyright (c) 2010 Department of Software Engineering,
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* University of Szeged, Hungary
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* Copyright (C) 2010 Tamas Toth <ttoth@inf.u-szeged.hu>
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* Copyright (C) 2010 Adam Hoka <ahoka@NetBSD.org>
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by the Department of Software Engineering, University of Szeged, Hungary
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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 <dev/flash/flash.h>
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#include <sys/uio.h>
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#include "chfs.h"
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#define DBG_WBUF 1 /* XXX unused, but should be */
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#define PAD(x) (((x)+3)&~3)
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#define EB_ADDRESS(x) ( rounddown((x), chmp->chm_ebh->eb_size) )
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#define PAGE_DIV(x) ( rounddown((x), chmp->chm_wbuf_pagesize) )
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#define PAGE_MOD(x) ( (x) % (chmp->chm_wbuf_pagesize) )
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/* writebuffer options */
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enum {
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WBUF_NOPAD,
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WBUF_SETPAD
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};
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/*
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* chfs_flush_wbuf - write wbuf to the flash
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* Returns zero in case of success.
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*/
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static int
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chfs_flush_wbuf(struct chfs_mount *chmp, int pad)
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{
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int ret;
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size_t retlen;
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struct chfs_node_ref *nref;
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struct chfs_flash_padding_node* padnode;
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KASSERT(mutex_owned(&chmp->chm_lock_mountfields));
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KASSERT(mutex_owned(&chmp->chm_lock_sizes));
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KASSERT(rw_write_held(&chmp->chm_lock_wbuf));
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KASSERT(pad == WBUF_SETPAD || pad == WBUF_NOPAD);
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/* check padding option */
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if (pad == WBUF_SETPAD) {
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chmp->chm_wbuf_len = PAD(chmp->chm_wbuf_len);
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memset(chmp->chm_wbuf + chmp->chm_wbuf_len, 0,
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chmp->chm_wbuf_pagesize - chmp->chm_wbuf_len);
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/* add a padding node */
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padnode = (void *)(chmp->chm_wbuf + chmp->chm_wbuf_len);
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padnode->magic = htole16(CHFS_FS_MAGIC_BITMASK);
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padnode->type = htole16(CHFS_NODETYPE_PADDING);
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padnode->length = htole32(chmp->chm_wbuf_pagesize
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- chmp->chm_wbuf_len);
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padnode->hdr_crc = htole32(crc32(0, (uint8_t *)padnode,
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sizeof(*padnode)-4));
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nref = chfs_alloc_node_ref(chmp->chm_nextblock);
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nref->nref_offset = chmp->chm_wbuf_ofs + chmp->chm_wbuf_len;
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nref->nref_offset = CHFS_GET_OFS(nref->nref_offset) |
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CHFS_OBSOLETE_NODE_MASK;
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chmp->chm_wbuf_len = chmp->chm_wbuf_pagesize;
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/* change sizes after padding node */
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chfs_change_size_free(chmp, chmp->chm_nextblock,
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-padnode->length);
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chfs_change_size_wasted(chmp, chmp->chm_nextblock,
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padnode->length);
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}
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/* write out the buffer */
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ret = chfs_write_leb(chmp, chmp->chm_nextblock->lnr, chmp->chm_wbuf,
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chmp->chm_wbuf_ofs, chmp->chm_wbuf_len, &retlen);
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if (ret) {
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return ret;
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}
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/* reset the buffer */
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memset(chmp->chm_wbuf, 0xff, chmp->chm_wbuf_pagesize);
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chmp->chm_wbuf_ofs += chmp->chm_wbuf_pagesize;
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chmp->chm_wbuf_len = 0;
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return 0;
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}
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/*
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* chfs_fill_wbuf - write data to wbuf
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* Return the len of the buf what we didn't write to the wbuf.
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*/
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static size_t
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chfs_fill_wbuf(struct chfs_mount *chmp, const u_char *buf, size_t len)
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{
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/* check available space */
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if (len && !chmp->chm_wbuf_len && (len >= chmp->chm_wbuf_pagesize)) {
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return 0;
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}
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/* check buffer's length */
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if (len > (chmp->chm_wbuf_pagesize - chmp->chm_wbuf_len)) {
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len = chmp->chm_wbuf_pagesize - chmp->chm_wbuf_len;
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}
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/* write into the wbuf */
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memcpy(chmp->chm_wbuf + chmp->chm_wbuf_len, buf, len);
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/* update the actual length of writebuffer */
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chmp->chm_wbuf_len += (int) len;
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return len;
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}
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/*
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* chfs_write_wbuf - write to wbuf and then the flash
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* Returns zero in case of success.
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*/
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int
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chfs_write_wbuf(struct chfs_mount* chmp, const struct iovec *invecs, long count,
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off_t to, size_t *retlen)
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{
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int invec, ret = 0;
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size_t wbuf_retlen, donelen = 0;
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int outvec_to = to;
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int lnr = chmp->chm_nextblock->lnr;
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KASSERT(mutex_owned(&chmp->chm_lock_mountfields));
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KASSERT(mutex_owned(&chmp->chm_lock_sizes));
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KASSERT(!rw_write_held(&chmp->chm_lock_wbuf));
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rw_enter(&chmp->chm_lock_wbuf, RW_WRITER);
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if (chmp->chm_wbuf_ofs == 0xffffffff) {
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chmp->chm_wbuf_ofs = PAGE_DIV(to);
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chmp->chm_wbuf_len = PAGE_MOD(to);
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memset(chmp->chm_wbuf, 0xff, chmp->chm_wbuf_pagesize);
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}
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if (EB_ADDRESS(to) != EB_ADDRESS(chmp->chm_wbuf_ofs)) {
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if (chmp->chm_wbuf_len) {
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ret = chfs_flush_wbuf(chmp, WBUF_SETPAD);
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if (ret)
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goto outerr;
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}
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chmp->chm_wbuf_ofs = PAGE_DIV(to);
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chmp->chm_wbuf_len = PAGE_MOD(to);
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}
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if (to != PAD(chmp->chm_wbuf_ofs + chmp->chm_wbuf_len)) {
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dbg("to: %llu != %zu\n", (unsigned long long)to,
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PAD(chmp->chm_wbuf_ofs + chmp->chm_wbuf_len));
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dbg("Non-contiguous write\n");
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panic("BUG\n");
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}
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/* adjust alignment offset */
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if (chmp->chm_wbuf_len != PAGE_MOD(to)) {
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chmp->chm_wbuf_len = PAGE_MOD(to);
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/* take care of alignement to next page */
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if (!chmp->chm_wbuf_len) {
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chmp->chm_wbuf_len += chmp->chm_wbuf_pagesize;
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ret = chfs_flush_wbuf(chmp, WBUF_NOPAD);
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if (ret)
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goto outerr;
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}
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}
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for (invec = 0; invec < count; invec++) {
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int vlen = invecs[invec].iov_len;
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u_char* v = invecs[invec].iov_base;
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/* fill the whole wbuf */
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wbuf_retlen = chfs_fill_wbuf(chmp, v, vlen);
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if (chmp->chm_wbuf_len == chmp->chm_wbuf_pagesize) {
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ret = chfs_flush_wbuf(chmp, WBUF_NOPAD);
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if (ret) {
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goto outerr;
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}
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}
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vlen -= wbuf_retlen;
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outvec_to += wbuf_retlen;
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v += wbuf_retlen;
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donelen += wbuf_retlen;
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/* if there is more residual data than the length of the wbuf
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* write it out directly until it's fit in the wbuf */
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if (vlen >= chmp->chm_wbuf_pagesize) {
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ret = chfs_write_leb(chmp, lnr, v, outvec_to, PAGE_DIV(vlen), &wbuf_retlen);
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vlen -= wbuf_retlen;
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outvec_to += wbuf_retlen;
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chmp->chm_wbuf_ofs = outvec_to;
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v += wbuf_retlen;
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donelen += wbuf_retlen;
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}
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/* write the residual data to the wbuf */
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wbuf_retlen = chfs_fill_wbuf(chmp, v, vlen);
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if (chmp->chm_wbuf_len == chmp->chm_wbuf_pagesize) {
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ret = chfs_flush_wbuf(chmp, WBUF_NOPAD);
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if (ret)
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goto outerr;
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}
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outvec_to += wbuf_retlen;
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donelen += wbuf_retlen;
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}
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*retlen = donelen;
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rw_exit(&chmp->chm_lock_wbuf);
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return ret;
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outerr:
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*retlen = 0;
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return ret;
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}
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/*
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* chfs_flush_peding_wbuf - write wbuf to the flash
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* Used when we must flush wbuf right now.
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* If wbuf has free space, pad it to the size of wbuf and write out.
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*/
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int chfs_flush_pending_wbuf(struct chfs_mount *chmp)
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{
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int err;
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KASSERT(mutex_owned(&chmp->chm_lock_mountfields));
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mutex_enter(&chmp->chm_lock_sizes);
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rw_enter(&chmp->chm_lock_wbuf, RW_WRITER);
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err = chfs_flush_wbuf(chmp, WBUF_SETPAD);
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rw_exit(&chmp->chm_lock_wbuf);
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mutex_exit(&chmp->chm_lock_sizes);
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return err;
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}
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