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raw-posix: Fix build without posix_fallocate()

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Check for the presence of posix_fallocate() in configure and only
compile in support for PREALLOC_MODE_FALLOC when it's there.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Kevin Wolf 2014-09-29 17:12:59 +02:00 committed by Peter Maydell
parent 0ebcc56453
commit ed9114356b
2 changed files with 32 additions and 4 deletions
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18
block/raw-posix.c
View File

@ -1416,16 +1416,21 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
goto out_close;
}
if (prealloc == PREALLOC_MODE_FALLOC) {
switch (prealloc) {
#ifdef CONFIG_POSIX_FALLOCATE
case PREALLOC_MODE_FALLOC:
/* posix_fallocate() doesn't set errno. */
result = -posix_fallocate(fd, 0, total_size);
if (result != 0) {
error_setg_errno(errp, -result,
"Could not preallocate data for the new file");
}
} else if (prealloc == PREALLOC_MODE_FULL) {
buf = g_malloc0(65536);
break;
#endif
case PREALLOC_MODE_FULL:
{
int64_t num = 0, left = total_size;
buf = g_malloc0(65536);
while (left > 0) {
num = MIN(left, 65536);
@ -1440,10 +1445,15 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
}
fsync(fd);
g_free(buf);
} else if (prealloc != PREALLOC_MODE_OFF) {
break;
}
case PREALLOC_MODE_OFF:
break;
default:
result = -EINVAL;
error_setg(errp, "Unsupported preallocation mode: %s",
PreallocMode_lookup[prealloc]);
break;
}
out_close:

18
configure vendored
View File

@ -3308,6 +3308,21 @@ if compile_prog "" "" ; then
fallocate_punch_hole=yes
fi
# check for posix_fallocate
posix_fallocate=no
cat > $TMPC << EOF
#include <fcntl.h>
int main(void)
{
posix_fallocate(0, 0, 0);
return 0;
}
EOF
if compile_prog "" "" ; then
posix_fallocate=yes
fi
# check for sync_file_range
sync_file_range=no
cat > $TMPC << EOF
@ -4522,6 +4537,9 @@ fi
if test "$fallocate_punch_hole" = "yes" ; then
echo "CONFIG_FALLOCATE_PUNCH_HOLE=y" >> $config_host_mak
fi
if test "$posix_fallocate" = "yes" ; then
echo "CONFIG_POSIX_FALLOCATE=y" >> $config_host_mak
fi
if test "$sync_file_range" = "yes" ; then
echo "CONFIG_SYNC_FILE_RANGE=y" >> $config_host_mak
fi