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block/raw-posix: create do_fallocate helper 

The pattern
    do {
        if (fallocate(s->fd, mode, offset, len) == 0) {
            return 0;
        }
    } while (errno == EINTR);
    ret = translate_err(-errno);
will be commonly useful in next patches. Create helper for it.

CC: Kevin Wolf <kwolf@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Peter Lieven <pl@kamp.de>
CC: Fam Zheng <famz@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Denis V. Lunev 2015-01-30 11:42:12 +03:00 committed by Kevin Wolf
parent 1486df0e31
commit 0b99171230
1 changed files with 14 additions and 8 deletions
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22
block/raw-posix.c
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@ -902,6 +902,18 @@ static int translate_err(int err)
return err;
}
#if defined(CONFIG_FALLOCATE_PUNCH_HOLE)
static int do_fallocate(int fd, int mode, off_t offset, off_t len)
{
do {
if (fallocate(fd, mode, offset, len) == 0) {
return 0;
}
} while (errno == EINTR);
return translate_err(-errno);
}
#endif
static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb)
{
int ret = -EOPNOTSUPP;
@ -965,14 +977,8 @@ static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb)
#endif
#ifdef CONFIG_FALLOCATE_PUNCH_HOLE
do {
if (fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
aiocb->aio_offset, aiocb->aio_nbytes) == 0) {
return 0;
}
} while (errno == EINTR);
ret = -errno;
ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
aiocb->aio_offset, aiocb->aio_nbytes);
#endif
}