| /* |
| * 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> |
| #endif |
| |
| #ifdef __OpenBSD__ |
| #include <sys/ioctl.h> |
| #include <sys/disklabel.h> |
| #include <sys/dkio.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 |
| #ifdef O_SYNC |
| #define O_DSYNC O_SYNC |
| #elif defined(O_FSYNC) |
| #define O_DSYNC O_FSYNC |
| #endif |
| #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 |
| uint8_t* aligned_buf; |
| } BDRVRawState; |
| |
| static int posix_aio_init(void); |
| |
| static int fd_open(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_memalign(512, 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 < 0) ? -errno : 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; |
| } |
| |
| /* |
| * 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; |
| } |
| |
| #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, uint8_t *buf, 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_buf = buf; |
| if (nb_sectors < 0) |
| acb->aiocb.aio_nbytes = -nb_sectors; |
| else |
| acb->aiocb.aio_nbytes = nb_sectors * 512; |
| acb->aiocb.aio_offset = sector_num * 512; |
| acb->next = posix_aio_state->first_aio; |
| posix_aio_state->first_aio = acb; |
| return acb; |
| } |
| |
| static void raw_aio_em_cb(void* opaque) |
| { |
| RawAIOCB *acb = opaque; |
| acb->common.cb(acb->common.opaque, acb->ret); |
| qemu_aio_release(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_read(BlockDriverState *bs, |
| int64_t sector_num, uint8_t *buf, int nb_sectors, |
| BlockDriverCompletionFunc *cb, void *opaque) |
| { |
| RawAIOCB *acb; |
| |
| /* |
| * If O_DIRECT is used and the buffer is not aligned fall back |
| * to synchronous IO. |
| */ |
| BDRVRawState *s = bs->opaque; |
| |
| if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
| QEMUBH *bh; |
| acb = qemu_aio_get(bs, cb, opaque); |
| acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors); |
| bh = qemu_bh_new(raw_aio_em_cb, acb); |
| qemu_bh_schedule(bh); |
| return &acb->common; |
| } |
| |
| acb = raw_aio_setup(bs, sector_num, buf, 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_write(BlockDriverState *bs, |
| int64_t sector_num, const uint8_t *buf, int nb_sectors, |
| BlockDriverCompletionFunc *cb, void *opaque) |
| { |
| RawAIOCB *acb; |
| |
| /* |
| * If O_DIRECT is used and the buffer is not aligned fall back |
| * to synchronous IO. |
| */ |
| BDRVRawState *s = bs->opaque; |
| |
| if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
| QEMUBH *bh; |
| acb = qemu_aio_get(bs, cb, opaque); |
| acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors); |
| bh = qemu_bh_new(raw_aio_em_cb, acb); |
| qemu_bh_schedule(bh); |
| return &acb->common; |
| } |
| |
| acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, 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 _BSD |
| struct stat sb; |
| #endif |
| #ifdef __sun__ |
| struct dk_minfo minfo; |
| int rv; |
| #endif |
| int ret; |
| |
| ret = fd_open(bs); |
| if (ret < 0) |
| return ret; |
| |
| #ifdef _BSD |
| if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
| #ifdef DIOCGMEDIASIZE |
| if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) |
| #endif |
| #ifdef CONFIG_COCOA |
| size = LONG_LONG_MAX; |
| #else |
| size = lseek(fd, 0LL, SEEK_END); |
| #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 = { |
| "raw", |
| sizeof(BDRVRawState), |
| NULL, /* no probe for protocols */ |
| raw_open, |
| NULL, |
| NULL, |
| raw_close, |
| raw_create, |
| raw_flush, |
| |
| #ifdef CONFIG_AIO |
| .bdrv_aio_read = raw_aio_read, |
| .bdrv_aio_write = raw_aio_write, |
| .bdrv_aio_cancel = raw_aio_cancel, |
| .aiocb_size = sizeof(RawAIOCB), |
| #endif |
| |
| .bdrv_pread = raw_pread, |
| .bdrv_pwrite = raw_pwrite, |
| .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; |
| } else if (strstart(filename, "/dev/sg", NULL)) { |
| bs->sg = 1; |
| } |
| #endif |
| fd = open(filename, open_flags, 0644); |
| if (fd < 0) { |
| ret = -errno; |
| if (ret == -EROFS) |
| ret = -EACCES; |
| return ret; |
| } |
| s->fd = fd; |
| #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); |
| } |
| #else |
| |
| 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; |
| } |
| #endif /* !linux */ |
| |
| BlockDriver bdrv_host_device = { |
| "host_device", |
| sizeof(BDRVRawState), |
| NULL, /* no probe for protocols */ |
| hdev_open, |
| NULL, |
| NULL, |
| raw_close, |
| NULL, |
| raw_flush, |
| |
| #ifdef CONFIG_AIO |
| .bdrv_aio_read = raw_aio_read, |
| .bdrv_aio_write = raw_aio_write, |
| .bdrv_aio_cancel = raw_aio_cancel, |
| .aiocb_size = sizeof(RawAIOCB), |
| #endif |
| |
| .bdrv_pread = raw_pread, |
| .bdrv_pwrite = raw_pwrite, |
| .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, |
| }; |
