diff options
| -rw-r--r-- | block/raw-posix.c | 18 | ||||
| -rwxr-xr-x | configure | 18 |
2 files changed, 32 insertions, 4 deletions
diff --git a/block/raw-posix.c b/block/raw-posix.c index a253697427..86ce4f2607 100644 --- a/block/raw-posix.c +++ b/block/raw-posix.c @@ -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: @@ -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 |