system/qemu
system/qemu
1
0
Fork 0
mirror of https://gitlab.com/qemu-project/qemu synced 2024-11-05 20:35:44 +00:00
Code Issues Projects Releases Packages Wiki Activity

raw-posix: always store open flags

Browse source 
Both the Linux floppy and the FreeBSD CDROM host device need to store
the open flags so that they can re-open the device later.  Store the
open flags unconditionally to remove the ifdef mess and simply the
calling conventions for the later patches in the series.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2009-06-15 13:53:26 +02:00 committed by Christoph Hellwig
parent 986c28d655
commit 0e1d8f4c54
1 changed files with 21 additions and 26 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

47
block/raw-posix.c
View file

@ -103,16 +103,13 @@ typedef struct BDRVRawState {
int fd;
int type;
unsigned int lseek_err_cnt;
int open_flags;
#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;
@ -130,32 +127,32 @@ 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;
int fd, ret;
posix_aio_init();
s->lseek_err_cnt = 0;
open_flags = O_BINARY;
s->open_flags |= O_BINARY;
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
open_flags |= O_RDWR;
s->open_flags |= O_RDWR;
} else {
open_flags |= O_RDONLY;
s->open_flags |= O_RDONLY;
bs->read_only = 1;
}
if (flags & BDRV_O_CREAT)
open_flags |= O_CREAT | O_TRUNC;
s->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;
s->open_flags |= O_DIRECT;
else if (!(flags & BDRV_O_CACHE_WB))
open_flags |= O_DSYNC;
s->open_flags |= O_DSYNC;
s->type = FTYPE_FILE;
fd = open(filename, open_flags, 0644);
fd = open(filename, s->open_flags, 0644);
if (fd < 0) {
ret = -errno;
if (ret == -EROFS)
@ -952,7 +949,7 @@ kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex ma
static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
{
BDRVRawState *s = bs->opaque;
int fd, open_flags, ret;
int fd, ret;
posix_aio_init();
@ -982,31 +979,30 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
IOObjectRelease( mediaIterator );
}
#endif
open_flags = O_BINARY;
s->open_flags |= O_BINARY;
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
open_flags |= O_RDWR;
s->open_flags |= O_RDWR;
} else {
open_flags |= O_RDONLY;
s->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;
s->open_flags |= O_DIRECT;
else if (!(flags & BDRV_O_CACHE_WB))
open_flags |= O_DSYNC;
s->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->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;
s->open_flags |= O_NONBLOCK;
#ifdef CONFIG_AIO
} else if (strstart(filename, "/dev/sg", NULL)) {
bs->sg = 1;
@ -1017,11 +1013,10 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
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);
fd = open(filename, s->open_flags, 0644);
if (fd < 0) {
ret = -errno;
if (ret == -EROFS)
@ -1073,7 +1068,7 @@ static int fd_open(BlockDriverState *bs)
#endif
return -EIO;
}
s->fd = open(bs->filename, s->fd_open_flags);
s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK);
if (s->fd < 0) {
s->fd_error_time = qemu_get_clock(rt_clock);
s->fd_got_error = 1;
@ -1162,7 +1157,7 @@ static int raw_eject(BlockDriverState *bs, int eject_flag)
close(s->fd);
s->fd = -1;
}
fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
fd = open(bs->filename, s->open_flags | O_NONBLOCK);
if (fd >= 0) {
if (ioctl(fd, FDEJECT, 0) < 0)
perror("FDEJECT");
@ -1258,7 +1253,7 @@ static int cd_open(BlockDriverState *bs)
* FreeBSD seems to not notice sometimes... */
if (s->fd >= 0)
close (s->fd);
fd = open(bs->filename, s->cd_open_flags, 0644);
fd = open(bs->filename, s->open_flags, 0644);
if (fd < 0) {
s->fd = -1;
return -EIO;