+++ /dev/null
-/*
- * Block driver for RAW files (posix)
- *
- * Copyright (c) 2006 Fabrice Bellard
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#include "qemu-common.h"
-#include "qemu-timer.h"
-#include "qemu-char.h"
-#include "block_int.h"
-#include <assert.h>
-#ifdef CONFIG_AIO
-#include "posix-aio-compat.h"
-#endif
-
-#ifdef CONFIG_COCOA
-#include <paths.h>
-#include <sys/param.h>
-#include <IOKit/IOKitLib.h>
-#include <IOKit/IOBSD.h>
-#include <IOKit/storage/IOMediaBSDClient.h>
-#include <IOKit/storage/IOMedia.h>
-#include <IOKit/storage/IOCDMedia.h>
-//#include <IOKit/storage/IOCDTypes.h>
-#include <CoreFoundation/CoreFoundation.h>
-#endif
-
-#ifdef __sun__
-#define _POSIX_PTHREAD_SEMANTICS 1
-#include <signal.h>
-#include <sys/dkio.h>
-#endif
-#ifdef __linux__
-#include <sys/ioctl.h>
-#include <linux/cdrom.h>
-#include <linux/fd.h>
-#endif
-#ifdef __FreeBSD__
-#include <signal.h>
-#include <sys/disk.h>
-#include <sys/cdio.h>
-#endif
-
-#ifdef __OpenBSD__
-#include <sys/ioctl.h>
-#include <sys/disklabel.h>
-#include <sys/dkio.h>
-#endif
-
-#ifdef __DragonFly__
-#include <sys/ioctl.h>
-#include <sys/diskslice.h>
-#endif
-
-//#define DEBUG_FLOPPY
-
-//#define DEBUG_BLOCK
-#if defined(DEBUG_BLOCK)
-#define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (qemu_log_enabled()) \
- { qemu_log(formatCstr, ##args); qemu_log_flush(); } } while (0)
-#else
-#define DEBUG_BLOCK_PRINT(formatCstr, args...)
-#endif
-
-/* OS X does not have O_DSYNC */
-#ifndef O_DSYNC
-#define O_DSYNC O_SYNC
-#endif
-
-/* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
-#ifndef O_DIRECT
-#define O_DIRECT O_DSYNC
-#endif
-
-#define FTYPE_FILE 0
-#define FTYPE_CD 1
-#define FTYPE_FD 2
-
-#define ALIGNED_BUFFER_SIZE (32 * 512)
-
-/* if the FD is not accessed during that time (in ms), we try to
- reopen it to see if the disk has been changed */
-#define FD_OPEN_TIMEOUT 1000
-
-typedef struct BDRVRawState {
- int fd;
- int type;
- unsigned int lseek_err_cnt;
-#if defined(__linux__)
- /* linux floppy specific */
- int fd_open_flags;
- int64_t fd_open_time;
- int64_t fd_error_time;
- int fd_got_error;
- int fd_media_changed;
-#endif
-#if defined(__FreeBSD__)
- int cd_open_flags;
-#endif
- uint8_t* aligned_buf;
-} BDRVRawState;
-
-static int posix_aio_init(void);
-
-static int fd_open(BlockDriverState *bs);
-
-#if defined(__FreeBSD__)
-static int cd_open(BlockDriverState *bs);
-#endif
-
-static int raw_is_inserted(BlockDriverState *bs);
-
-static int raw_open(BlockDriverState *bs, const char *filename, int flags)
-{
- BDRVRawState *s = bs->opaque;
- int fd, open_flags, ret;
-
- posix_aio_init();
-
- s->lseek_err_cnt = 0;
-
- open_flags = O_BINARY;
- if ((flags & BDRV_O_ACCESS) == O_RDWR) {
- open_flags |= O_RDWR;
- } else {
- open_flags |= O_RDONLY;
- bs->read_only = 1;
- }
- if (flags & BDRV_O_CREAT)
- open_flags |= O_CREAT | O_TRUNC;
-
- /* Use O_DSYNC for write-through caching, no flags for write-back caching,
- * and O_DIRECT for no caching. */
- if ((flags & BDRV_O_NOCACHE))
- open_flags |= O_DIRECT;
- else if (!(flags & BDRV_O_CACHE_WB))
- open_flags |= O_DSYNC;
-
- s->type = FTYPE_FILE;
-
- fd = open(filename, open_flags, 0644);
- if (fd < 0) {
- ret = -errno;
- if (ret == -EROFS)
- ret = -EACCES;
- return ret;
- }
- s->fd = fd;
- s->aligned_buf = NULL;
- if ((flags & BDRV_O_NOCACHE)) {
- s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
- if (s->aligned_buf == NULL) {
- ret = -errno;
- close(fd);
- return ret;
- }
- }
- return 0;
-}
-
-/* XXX: use host sector size if necessary with:
-#ifdef DIOCGSECTORSIZE
- {
- unsigned int sectorsize = 512;
- if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
- sectorsize > bufsize)
- bufsize = sectorsize;
- }
-#endif
-#ifdef CONFIG_COCOA
- u_int32_t blockSize = 512;
- if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
- bufsize = blockSize;
- }
-#endif
-*/
-
-/*
- * offset and count are in bytes, but must be multiples of 512 for files
- * opened with O_DIRECT. buf must be aligned to 512 bytes then.
- *
- * This function may be called without alignment if the caller ensures
- * that O_DIRECT is not in effect.
- */
-static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
- uint8_t *buf, int count)
-{
- BDRVRawState *s = bs->opaque;
- int ret;
-
- ret = fd_open(bs);
- if (ret < 0)
- return ret;
-
- if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
- ++(s->lseek_err_cnt);
- if(s->lseek_err_cnt <= 10) {
- DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
- "] lseek failed : %d = %s\n",
- s->fd, bs->filename, offset, buf, count,
- bs->total_sectors, errno, strerror(errno));
- }
- return -1;
- }
- s->lseek_err_cnt=0;
-
- ret = read(s->fd, buf, count);
- if (ret == count)
- goto label__raw_read__success;
-
- DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
- "] read failed %d : %d = %s\n",
- s->fd, bs->filename, offset, buf, count,
- bs->total_sectors, ret, errno, strerror(errno));
-
- /* Try harder for CDrom. */
- if (bs->type == BDRV_TYPE_CDROM) {
- lseek(s->fd, offset, SEEK_SET);
- ret = read(s->fd, buf, count);
- if (ret == count)
- goto label__raw_read__success;
- lseek(s->fd, offset, SEEK_SET);
- ret = read(s->fd, buf, count);
- if (ret == count)
- goto label__raw_read__success;
-
- DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
- "] retry read failed %d : %d = %s\n",
- s->fd, bs->filename, offset, buf, count,
- bs->total_sectors, ret, errno, strerror(errno));
- }
-
-label__raw_read__success:
-
- return ret;
-}
-
-/*
- * offset and count are in bytes, but must be multiples of 512 for files
- * opened with O_DIRECT. buf must be aligned to 512 bytes then.
- *
- * This function may be called without alignment if the caller ensures
- * that O_DIRECT is not in effect.
- */
-static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
- const uint8_t *buf, int count)
-{
- BDRVRawState *s = bs->opaque;
- int ret;
-
- ret = fd_open(bs);
- if (ret < 0)
- return -errno;
-
- if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
- ++(s->lseek_err_cnt);
- if(s->lseek_err_cnt) {
- DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
- PRId64 "] lseek failed : %d = %s\n",
- s->fd, bs->filename, offset, buf, count,
- bs->total_sectors, errno, strerror(errno));
- }
- return -EIO;
- }
- s->lseek_err_cnt = 0;
-
- ret = write(s->fd, buf, count);
- if (ret == count)
- goto label__raw_write__success;
-
- DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
- "] write failed %d : %d = %s\n",
- s->fd, bs->filename, offset, buf, count,
- bs->total_sectors, ret, errno, strerror(errno));
-
-label__raw_write__success:
-
- return (ret < 0) ? -errno : ret;
-}
-
-
-/*
- * offset and count are in bytes and possibly not aligned. For files opened
- * with O_DIRECT, necessary alignments are ensured before calling
- * raw_pread_aligned to do the actual read.
- */
-static int raw_pread(BlockDriverState *bs, int64_t offset,
- uint8_t *buf, int count)
-{
- BDRVRawState *s = bs->opaque;
- int size, ret, shift, sum;
-
- sum = 0;
-
- if (s->aligned_buf != NULL) {
-
- if (offset & 0x1ff) {
- /* align offset on a 512 bytes boundary */
-
- shift = offset & 0x1ff;
- size = (shift + count + 0x1ff) & ~0x1ff;
- if (size > ALIGNED_BUFFER_SIZE)
- size = ALIGNED_BUFFER_SIZE;
- ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
- if (ret < 0)
- return ret;
-
- size = 512 - shift;
- if (size > count)
- size = count;
- memcpy(buf, s->aligned_buf + shift, size);
-
- buf += size;
- offset += size;
- count -= size;
- sum += size;
-
- if (count == 0)
- return sum;
- }
- if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
-
- /* read on aligned buffer */
-
- while (count) {
-
- size = (count + 0x1ff) & ~0x1ff;
- if (size > ALIGNED_BUFFER_SIZE)
- size = ALIGNED_BUFFER_SIZE;
-
- ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
- if (ret < 0)
- return ret;
-
- size = ret;
- if (size > count)
- size = count;
-
- memcpy(buf, s->aligned_buf, size);
-
- buf += size;
- offset += size;
- count -= size;
- sum += size;
- }
-
- return sum;
- }
- }
-
- return raw_pread_aligned(bs, offset, buf, count) + sum;
-}
-
-static int raw_read(BlockDriverState *bs, int64_t sector_num,
- uint8_t *buf, int nb_sectors)
-{
- int ret;
-
- ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
- if (ret == (nb_sectors * 512))
- ret = 0;
- return ret;
-}
-
-/*
- * offset and count are in bytes and possibly not aligned. For files opened
- * with O_DIRECT, necessary alignments are ensured before calling
- * raw_pwrite_aligned to do the actual write.
- */
-static int raw_pwrite(BlockDriverState *bs, int64_t offset,
- const uint8_t *buf, int count)
-{
- BDRVRawState *s = bs->opaque;
- int size, ret, shift, sum;
-
- sum = 0;
-
- if (s->aligned_buf != NULL) {
-
- if (offset & 0x1ff) {
- /* align offset on a 512 bytes boundary */
- shift = offset & 0x1ff;
- ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
- if (ret < 0)
- return ret;
-
- size = 512 - shift;
- if (size > count)
- size = count;
- memcpy(s->aligned_buf + shift, buf, size);
-
- ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
- if (ret < 0)
- return ret;
-
- buf += size;
- offset += size;
- count -= size;
- sum += size;
-
- if (count == 0)
- return sum;
- }
- if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
-
- while ((size = (count & ~0x1ff)) != 0) {
-
- if (size > ALIGNED_BUFFER_SIZE)
- size = ALIGNED_BUFFER_SIZE;
-
- memcpy(s->aligned_buf, buf, size);
-
- ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
- if (ret < 0)
- return ret;
-
- buf += ret;
- offset += ret;
- count -= ret;
- sum += ret;
- }
- /* here, count < 512 because (count & ~0x1ff) == 0 */
- if (count) {
- ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
- if (ret < 0)
- return ret;
- memcpy(s->aligned_buf, buf, count);
-
- ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
- if (ret < 0)
- return ret;
- if (count < ret)
- ret = count;
-
- sum += ret;
- }
- return sum;
- }
- }
- return raw_pwrite_aligned(bs, offset, buf, count) + sum;
-}
-
-static int raw_write(BlockDriverState *bs, int64_t sector_num,
- const uint8_t *buf, int nb_sectors)
-{
- int ret;
- ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
- if (ret == (nb_sectors * 512))
- ret = 0;
- return ret;
-}
-
-#ifdef CONFIG_AIO
-/***********************************************************/
-/* Unix AIO using POSIX AIO */
-
-typedef struct RawAIOCB {
- BlockDriverAIOCB common;
- struct qemu_paiocb aiocb;
- struct RawAIOCB *next;
- int ret;
-} RawAIOCB;
-
-typedef struct PosixAioState
-{
- int rfd, wfd;
- RawAIOCB *first_aio;
-} PosixAioState;
-
-static void posix_aio_read(void *opaque)
-{
- PosixAioState *s = opaque;
- RawAIOCB *acb, **pacb;
- int ret;
- ssize_t len;
-
- /* read all bytes from signal pipe */
- for (;;) {
- char bytes[16];
-
- len = read(s->rfd, bytes, sizeof(bytes));
- if (len == -1 && errno == EINTR)
- continue; /* try again */
- if (len == sizeof(bytes))
- continue; /* more to read */
- break;
- }
-
- for(;;) {
- pacb = &s->first_aio;
- for(;;) {
- acb = *pacb;
- if (!acb)
- goto the_end;
- ret = qemu_paio_error(&acb->aiocb);
- if (ret == ECANCELED) {
- /* remove the request */
- *pacb = acb->next;
- qemu_aio_release(acb);
- } else if (ret != EINPROGRESS) {
- /* end of aio */
- if (ret == 0) {
- ret = qemu_paio_return(&acb->aiocb);
- if (ret == acb->aiocb.aio_nbytes)
- ret = 0;
- else
- ret = -EINVAL;
- } else {
- ret = -ret;
- }
- /* remove the request */
- *pacb = acb->next;
- /* call the callback */
- acb->common.cb(acb->common.opaque, ret);
- qemu_aio_release(acb);
- break;
- } else {
- pacb = &acb->next;
- }
- }
- }
- the_end: ;
-}
-
-static int posix_aio_flush(void *opaque)
-{
- PosixAioState *s = opaque;
- return !!s->first_aio;
-}
-
-static PosixAioState *posix_aio_state;
-
-static void aio_signal_handler(int signum)
-{
- if (posix_aio_state) {
- char byte = 0;
-
- write(posix_aio_state->wfd, &byte, sizeof(byte));
- }
-
- qemu_service_io();
-}
-
-static int posix_aio_init(void)
-{
- struct sigaction act;
- PosixAioState *s;
- int fds[2];
- struct qemu_paioinit ai;
-
- if (posix_aio_state)
- return 0;
-
- s = qemu_malloc(sizeof(PosixAioState));
-
- sigfillset(&act.sa_mask);
- act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
- act.sa_handler = aio_signal_handler;
- sigaction(SIGUSR2, &act, NULL);
-
- s->first_aio = NULL;
- if (pipe(fds) == -1) {
- fprintf(stderr, "failed to create pipe\n");
- return -errno;
- }
-
- s->rfd = fds[0];
- s->wfd = fds[1];
-
- fcntl(s->rfd, F_SETFL, O_NONBLOCK);
- fcntl(s->wfd, F_SETFL, O_NONBLOCK);
-
- qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
-
- memset(&ai, 0, sizeof(ai));
- ai.aio_threads = 64;
- ai.aio_num = 64;
- qemu_paio_init(&ai);
-
- posix_aio_state = s;
-
- return 0;
-}
-
-static RawAIOCB *raw_aio_setup(BlockDriverState *bs, int64_t sector_num,
- QEMUIOVector *qiov, int nb_sectors,
- BlockDriverCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
- RawAIOCB *acb;
-
- if (fd_open(bs) < 0)
- return NULL;
-
- acb = qemu_aio_get(bs, cb, opaque);
- if (!acb)
- return NULL;
- acb->aiocb.aio_fildes = s->fd;
- acb->aiocb.ev_signo = SIGUSR2;
- acb->aiocb.aio_iov = qiov->iov;
- acb->aiocb.aio_niov = qiov->niov;
- acb->aiocb.aio_nbytes = nb_sectors * 512;
- acb->aiocb.aio_offset = sector_num * 512;
- acb->aiocb.aio_flags = 0;
-
- /*
- * If O_DIRECT is used the buffer needs to be aligned on a sector
- * boundary. Tell the low level code to ensure that in case it's
- * not done yet.
- */
- if (s->aligned_buf)
- acb->aiocb.aio_flags |= QEMU_AIO_SECTOR_ALIGNED;
-
- acb->next = posix_aio_state->first_aio;
- posix_aio_state->first_aio = acb;
- return acb;
-}
-
-static void raw_aio_remove(RawAIOCB *acb)
-{
- RawAIOCB **pacb;
-
- /* remove the callback from the queue */
- pacb = &posix_aio_state->first_aio;
- for(;;) {
- if (*pacb == NULL) {
- fprintf(stderr, "raw_aio_remove: aio request not found!\n");
- break;
- } else if (*pacb == acb) {
- *pacb = acb->next;
- qemu_aio_release(acb);
- break;
- }
- pacb = &(*pacb)->next;
- }
-}
-
-static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
- int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
- BlockDriverCompletionFunc *cb, void *opaque)
-{
- RawAIOCB *acb;
-
- acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
- if (!acb)
- return NULL;
- if (qemu_paio_read(&acb->aiocb) < 0) {
- raw_aio_remove(acb);
- return NULL;
- }
- return &acb->common;
-}
-
-static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
- int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
- BlockDriverCompletionFunc *cb, void *opaque)
-{
- RawAIOCB *acb;
-
- acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
- if (!acb)
- return NULL;
- if (qemu_paio_write(&acb->aiocb) < 0) {
- raw_aio_remove(acb);
- return NULL;
- }
- return &acb->common;
-}
-
-static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
-{
- int ret;
- RawAIOCB *acb = (RawAIOCB *)blockacb;
-
- ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
- if (ret == QEMU_PAIO_NOTCANCELED) {
- /* fail safe: if the aio could not be canceled, we wait for
- it */
- while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
- }
-
- raw_aio_remove(acb);
-}
-#else /* CONFIG_AIO */
-static int posix_aio_init(void)
-{
- return 0;
-}
-#endif /* CONFIG_AIO */
-
-
-static void raw_close(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- if (s->fd >= 0) {
- close(s->fd);
- s->fd = -1;
- if (s->aligned_buf != NULL)
- qemu_free(s->aligned_buf);
- }
-}
-
-static int raw_truncate(BlockDriverState *bs, int64_t offset)
-{
- BDRVRawState *s = bs->opaque;
- if (s->type != FTYPE_FILE)
- return -ENOTSUP;
- if (ftruncate(s->fd, offset) < 0)
- return -errno;
- return 0;
-}
-
-#ifdef __OpenBSD__
-static int64_t raw_getlength(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- int fd = s->fd;
- struct stat st;
-
- if (fstat(fd, &st))
- return -1;
- if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
- struct disklabel dl;
-
- if (ioctl(fd, DIOCGDINFO, &dl))
- return -1;
- return (uint64_t)dl.d_secsize *
- dl.d_partitions[DISKPART(st.st_rdev)].p_size;
- } else
- return st.st_size;
-}
-#else /* !__OpenBSD__ */
-static int64_t raw_getlength(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- int fd = s->fd;
- int64_t size;
-#ifdef HOST_BSD
- struct stat sb;
-#ifdef __FreeBSD__
- int reopened = 0;
-#endif
-#endif
-#ifdef __sun__
- struct dk_minfo minfo;
- int rv;
-#endif
- int ret;
-
- ret = fd_open(bs);
- if (ret < 0)
- return ret;
-
-#ifdef HOST_BSD
-#ifdef __FreeBSD__
-again:
-#endif
- if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
-#ifdef DIOCGMEDIASIZE
- if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
-#elif defined(DIOCGPART)
- {
- struct partinfo pi;
- if (ioctl(fd, DIOCGPART, &pi) == 0)
- size = pi.media_size;
- else
- size = 0;
- }
- if (size == 0)
-#endif
-#ifdef CONFIG_COCOA
- size = LONG_LONG_MAX;
-#else
- size = lseek(fd, 0LL, SEEK_END);
-#endif
-#ifdef __FreeBSD__
- switch(s->type) {
- case FTYPE_CD:
- /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
- if (size == 2048LL * (unsigned)-1)
- size = 0;
- /* XXX no disc? maybe we need to reopen... */
- if (size <= 0 && !reopened && cd_open(bs) >= 0) {
- reopened = 1;
- goto again;
- }
- }
-#endif
- } else
-#endif
-#ifdef __sun__
- /*
- * use the DKIOCGMEDIAINFO ioctl to read the size.
- */
- rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
- if ( rv != -1 ) {
- size = minfo.dki_lbsize * minfo.dki_capacity;
- } else /* there are reports that lseek on some devices
- fails, but irc discussion said that contingency
- on contingency was overkill */
-#endif
- {
- size = lseek(fd, 0, SEEK_END);
- }
- return size;
-}
-#endif
-
-static int raw_create(const char *filename, int64_t total_size,
- const char *backing_file, int flags)
-{
- int fd;
-
- if (flags || backing_file)
- return -ENOTSUP;
-
- fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
- 0644);
- if (fd < 0)
- return -EIO;
- ftruncate(fd, total_size * 512);
- close(fd);
- return 0;
-}
-
-static void raw_flush(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- fsync(s->fd);
-}
-
-BlockDriver bdrv_raw = {
- .format_name = "raw",
- .instance_size = sizeof(BDRVRawState),
- .bdrv_probe = NULL, /* no probe for protocols */
- .bdrv_open = raw_open,
- .bdrv_read = raw_read,
- .bdrv_write = raw_write,
- .bdrv_close = raw_close,
- .bdrv_create = raw_create,
- .bdrv_flush = raw_flush,
-
-#ifdef CONFIG_AIO
- .bdrv_aio_readv = raw_aio_readv,
- .bdrv_aio_writev = raw_aio_writev,
- .bdrv_aio_cancel = raw_aio_cancel,
- .aiocb_size = sizeof(RawAIOCB),
-#endif
-
- .bdrv_truncate = raw_truncate,
- .bdrv_getlength = raw_getlength,
-};
-
-/***********************************************/
-/* host device */
-
-#ifdef CONFIG_COCOA
-static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
-static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
-
-kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
-{
- kern_return_t kernResult;
- mach_port_t masterPort;
- CFMutableDictionaryRef classesToMatch;
-
- kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
- if ( KERN_SUCCESS != kernResult ) {
- printf( "IOMasterPort returned %d\n", kernResult );
- }
-
- classesToMatch = IOServiceMatching( kIOCDMediaClass );
- if ( classesToMatch == NULL ) {
- printf( "IOServiceMatching returned a NULL dictionary.\n" );
- } else {
- CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
- }
- kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
- if ( KERN_SUCCESS != kernResult )
- {
- printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
- }
-
- return kernResult;
-}
-
-kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
-{
- io_object_t nextMedia;
- kern_return_t kernResult = KERN_FAILURE;
- *bsdPath = '\0';
- nextMedia = IOIteratorNext( mediaIterator );
- if ( nextMedia )
- {
- CFTypeRef bsdPathAsCFString;
- bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
- if ( bsdPathAsCFString ) {
- size_t devPathLength;
- strcpy( bsdPath, _PATH_DEV );
- strcat( bsdPath, "r" );
- devPathLength = strlen( bsdPath );
- if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
- kernResult = KERN_SUCCESS;
- }
- CFRelease( bsdPathAsCFString );
- }
- IOObjectRelease( nextMedia );
- }
-
- return kernResult;
-}
-
-#endif
-
-static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
-{
- BDRVRawState *s = bs->opaque;
- int fd, open_flags, ret;
-
- posix_aio_init();
-
-#ifdef CONFIG_COCOA
- if (strstart(filename, "/dev/cdrom", NULL)) {
- kern_return_t kernResult;
- io_iterator_t mediaIterator;
- char bsdPath[ MAXPATHLEN ];
- int fd;
-
- kernResult = FindEjectableCDMedia( &mediaIterator );
- kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
-
- if ( bsdPath[ 0 ] != '\0' ) {
- strcat(bsdPath,"s0");
- /* some CDs don't have a partition 0 */
- fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
- if (fd < 0) {
- bsdPath[strlen(bsdPath)-1] = '1';
- } else {
- close(fd);
- }
- filename = bsdPath;
- }
-
- if ( mediaIterator )
- IOObjectRelease( mediaIterator );
- }
-#endif
- open_flags = O_BINARY;
- if ((flags & BDRV_O_ACCESS) == O_RDWR) {
- open_flags |= O_RDWR;
- } else {
- open_flags |= O_RDONLY;
- bs->read_only = 1;
- }
- /* Use O_DSYNC for write-through caching, no flags for write-back caching,
- * and O_DIRECT for no caching. */
- if ((flags & BDRV_O_NOCACHE))
- open_flags |= O_DIRECT;
- else if (!(flags & BDRV_O_CACHE_WB))
- open_flags |= O_DSYNC;
-
- s->type = FTYPE_FILE;
-#if defined(__linux__)
- if (strstart(filename, "/dev/cd", NULL)) {
- /* open will not fail even if no CD is inserted */
- open_flags |= O_NONBLOCK;
- s->type = FTYPE_CD;
- } else if (strstart(filename, "/dev/fd", NULL)) {
- s->type = FTYPE_FD;
- s->fd_open_flags = open_flags;
- /* open will not fail even if no floppy is inserted */
- open_flags |= O_NONBLOCK;
-#ifdef CONFIG_AIO
- } else if (strstart(filename, "/dev/sg", NULL)) {
- bs->sg = 1;
-#endif
- }
-#endif
-#if defined(__FreeBSD__)
- if (strstart(filename, "/dev/cd", NULL) ||
- strstart(filename, "/dev/acd", NULL)) {
- s->type = FTYPE_CD;
- s->cd_open_flags = open_flags;
- }
-#endif
- s->fd = -1;
- fd = open(filename, open_flags, 0644);
- if (fd < 0) {
- ret = -errno;
- if (ret == -EROFS)
- ret = -EACCES;
- return ret;
- }
- s->fd = fd;
-#if defined(__FreeBSD__)
- /* make sure the door isnt locked at this time */
- if (s->type == FTYPE_CD)
- ioctl (s->fd, CDIOCALLOW);
-#endif
-#if defined(__linux__)
- /* close fd so that we can reopen it as needed */
- if (s->type == FTYPE_FD) {
- close(s->fd);
- s->fd = -1;
- s->fd_media_changed = 1;
- }
-#endif
- return 0;
-}
-
-#if defined(__linux__)
-/* Note: we do not have a reliable method to detect if the floppy is
- present. The current method is to try to open the floppy at every
- I/O and to keep it opened during a few hundreds of ms. */
-static int fd_open(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- int last_media_present;
-
- if (s->type != FTYPE_FD)
- return 0;
- last_media_present = (s->fd >= 0);
- if (s->fd >= 0 &&
- (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
- close(s->fd);
- s->fd = -1;
-#ifdef DEBUG_FLOPPY
- printf("Floppy closed\n");
-#endif
- }
- if (s->fd < 0) {
- if (s->fd_got_error &&
- (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
-#ifdef DEBUG_FLOPPY
- printf("No floppy (open delayed)\n");
-#endif
- return -EIO;
- }
- s->fd = open(bs->filename, s->fd_open_flags);
- if (s->fd < 0) {
- s->fd_error_time = qemu_get_clock(rt_clock);
- s->fd_got_error = 1;
- if (last_media_present)
- s->fd_media_changed = 1;
-#ifdef DEBUG_FLOPPY
- printf("No floppy\n");
-#endif
- return -EIO;
- }
-#ifdef DEBUG_FLOPPY
- printf("Floppy opened\n");
-#endif
- }
- if (!last_media_present)
- s->fd_media_changed = 1;
- s->fd_open_time = qemu_get_clock(rt_clock);
- s->fd_got_error = 0;
- return 0;
-}
-
-static int raw_is_inserted(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- int ret;
-
- switch(s->type) {
- case FTYPE_CD:
- ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
- if (ret == CDS_DISC_OK)
- return 1;
- else
- return 0;
- break;
- case FTYPE_FD:
- ret = fd_open(bs);
- return (ret >= 0);
- default:
- return 1;
- }
-}
-
-/* currently only used by fdc.c, but a CD version would be good too */
-static int raw_media_changed(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
-
- switch(s->type) {
- case FTYPE_FD:
- {
- int ret;
- /* XXX: we do not have a true media changed indication. It
- does not work if the floppy is changed without trying
- to read it */
- fd_open(bs);
- ret = s->fd_media_changed;
- s->fd_media_changed = 0;
-#ifdef DEBUG_FLOPPY
- printf("Floppy changed=%d\n", ret);
-#endif
- return ret;
- }
- default:
- return -ENOTSUP;
- }
-}
-
-static int raw_eject(BlockDriverState *bs, int eject_flag)
-{
- BDRVRawState *s = bs->opaque;
-
- switch(s->type) {
- case FTYPE_CD:
- if (eject_flag) {
- if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
- perror("CDROMEJECT");
- } else {
- if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
- perror("CDROMEJECT");
- }
- break;
- case FTYPE_FD:
- {
- int fd;
- if (s->fd >= 0) {
- close(s->fd);
- s->fd = -1;
- }
- fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
- if (fd >= 0) {
- if (ioctl(fd, FDEJECT, 0) < 0)
- perror("FDEJECT");
- close(fd);
- }
- }
- break;
- default:
- return -ENOTSUP;
- }
- return 0;
-}
-
-static int raw_set_locked(BlockDriverState *bs, int locked)
-{
- BDRVRawState *s = bs->opaque;
-
- switch(s->type) {
- case FTYPE_CD:
- if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
- /* Note: an error can happen if the distribution automatically
- mounts the CD-ROM */
- // perror("CDROM_LOCKDOOR");
- }
- break;
- default:
- return -ENOTSUP;
- }
- return 0;
-}
-
-static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
-{
- BDRVRawState *s = bs->opaque;
-
- return ioctl(s->fd, req, buf);
-}
-
-#ifdef CONFIG_AIO
-static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
- unsigned long int req, void *buf,
- BlockDriverCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
- RawAIOCB *acb;
-
- if (fd_open(bs) < 0)
- return NULL;
-
- acb = qemu_aio_get(bs, cb, opaque);
- if (!acb)
- return NULL;
- acb->aiocb.aio_fildes = s->fd;
- acb->aiocb.ev_signo = SIGUSR2;
- acb->aiocb.aio_offset = 0;
- acb->aiocb.aio_flags = 0;
-
- acb->next = posix_aio_state->first_aio;
- posix_aio_state->first_aio = acb;
-
- acb->aiocb.aio_ioctl_buf = buf;
- acb->aiocb.aio_ioctl_cmd = req;
- if (qemu_paio_ioctl(&acb->aiocb) < 0) {
- raw_aio_remove(acb);
- return NULL;
- }
-
- return &acb->common;
-}
-#endif
-
-#elif defined(__FreeBSD__)
-
-static int fd_open(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
-
- /* this is just to ensure s->fd is sane (its called by io ops) */
- if (s->fd >= 0)
- return 0;
- return -EIO;
-}
-
-static int cd_open(BlockDriverState *bs)
-{
-#if defined(__FreeBSD__)
- BDRVRawState *s = bs->opaque;
- int fd;
-
- switch(s->type) {
- case FTYPE_CD:
- /* XXX force reread of possibly changed/newly loaded disc,
- * FreeBSD seems to not notice sometimes... */
- if (s->fd >= 0)
- close (s->fd);
- fd = open(bs->filename, s->cd_open_flags, 0644);
- if (fd < 0) {
- s->fd = -1;
- return -EIO;
- }
- s->fd = fd;
- /* make sure the door isnt locked at this time */
- ioctl (s->fd, CDIOCALLOW);
- }
-#endif
- return 0;
-}
-
-static int raw_is_inserted(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
-
- switch(s->type) {
- case FTYPE_CD:
- return (raw_getlength(bs) > 0);
- case FTYPE_FD:
- /* XXX handle this */
- /* FALLTHRU */
- default:
- return 1;
- }
-}
-
-static int raw_media_changed(BlockDriverState *bs)
-{
- return -ENOTSUP;
-}
-
-static int raw_eject(BlockDriverState *bs, int eject_flag)
-{
- BDRVRawState *s = bs->opaque;
-
- switch(s->type) {
- case FTYPE_CD:
- if (s->fd < 0)
- return -ENOTSUP;
- (void) ioctl (s->fd, CDIOCALLOW);
- if (eject_flag) {
- if (ioctl (s->fd, CDIOCEJECT) < 0)
- perror("CDIOCEJECT");
- } else {
- if (ioctl (s->fd, CDIOCCLOSE) < 0)
- perror("CDIOCCLOSE");
- }
- if (cd_open(bs) < 0)
- return -ENOTSUP;
- break;
- case FTYPE_FD:
- /* XXX handle this */
- /* FALLTHRU */
- default:
- return -ENOTSUP;
- }
- return 0;
-}
-
-static int raw_set_locked(BlockDriverState *bs, int locked)
-{
- BDRVRawState *s = bs->opaque;
-
- switch(s->type) {
- case FTYPE_CD:
- if (s->fd < 0)
- return -ENOTSUP;
- if (ioctl (s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
- /* Note: an error can happen if the distribution automatically
- mounts the CD-ROM */
- // perror("CDROM_LOCKDOOR");
- }
- break;
- default:
- return -ENOTSUP;
- }
- return 0;
-}
-
-static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
-{
- return -ENOTSUP;
-}
-#else /* !linux && !FreeBSD */
-
-static int fd_open(BlockDriverState *bs)
-{
- return 0;
-}
-
-static int raw_is_inserted(BlockDriverState *bs)
-{
- return 1;
-}
-
-static int raw_media_changed(BlockDriverState *bs)
-{
- return -ENOTSUP;
-}
-
-static int raw_eject(BlockDriverState *bs, int eject_flag)
-{
- return -ENOTSUP;
-}
-
-static int raw_set_locked(BlockDriverState *bs, int locked)
-{
- return -ENOTSUP;
-}
-
-static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
-{
- return -ENOTSUP;
-}
-
-static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
- unsigned long int req, void *buf,
- BlockDriverCompletionFunc *cb, void *opaque)
-{
- return NULL;
-}
-#endif /* !linux && !FreeBSD */
-
-#if defined(__linux__) || defined(__FreeBSD__)
-static int hdev_create(const char *filename, int64_t total_size,
- const char *backing_file, int flags)
-{
- int fd;
- int ret = 0;
- struct stat stat_buf;
-
- if (flags || backing_file)
- return -ENOTSUP;
-
- fd = open(filename, O_WRONLY | O_BINARY);
- if (fd < 0)
- return -EIO;
-
- if (fstat(fd, &stat_buf) < 0)
- ret = -EIO;
- else if (!S_ISBLK(stat_buf.st_mode))
- ret = -EIO;
- else if (lseek(fd, 0, SEEK_END) < total_size * 512)
- ret = -ENOSPC;
-
- close(fd);
- return ret;
-}
-
-#else /* !(linux || freebsd) */
-
-static int hdev_create(const char *filename, int64_t total_size,
- const char *backing_file, int flags)
-{
- return -ENOTSUP;
-}
-#endif
-
-BlockDriver bdrv_host_device = {
- .format_name = "host_device",
- .instance_size = sizeof(BDRVRawState),
- .bdrv_open = hdev_open,
- .bdrv_close = raw_close,
- .bdrv_create = hdev_create,
- .bdrv_flush = raw_flush,
-
-#ifdef CONFIG_AIO
- .bdrv_aio_readv = raw_aio_readv,
- .bdrv_aio_writev = raw_aio_writev,
- .bdrv_aio_cancel = raw_aio_cancel,
- .aiocb_size = sizeof(RawAIOCB),
-#endif
-
- .bdrv_read = raw_read,
- .bdrv_write = raw_write,
- .bdrv_getlength = raw_getlength,
-
- /* removable device support */
- .bdrv_is_inserted = raw_is_inserted,
- .bdrv_media_changed = raw_media_changed,
- .bdrv_eject = raw_eject,
- .bdrv_set_locked = raw_set_locked,
- /* generic scsi device */
- .bdrv_ioctl = raw_ioctl,
-#ifdef CONFIG_AIO
- .bdrv_aio_ioctl = raw_aio_ioctl,
-#endif
-};
projects / qemu / blobdiff