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gluster: Pull truncation from qemu_gluster_create

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Pull out the truncation code from the qemu_cluster_create() function so
we can later reuse it in qemu_gluster_truncate().

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2018-02-13 14:03:51 +01:00 committed by Kevin Wolf
parent 0375003df4
commit 36e87909f8
1 changed files with 40 additions and 34 deletions
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74
block/gluster.c
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@ -965,6 +965,45 @@ static coroutine_fn int qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs,
}
#endif
static int qemu_gluster_do_truncate(struct glfs_fd *fd, int64_t offset,
PreallocMode prealloc, Error **errp)
{
switch (prealloc) {
#ifdef CONFIG_GLUSTERFS_FALLOCATE
case PREALLOC_MODE_FALLOC:
if (glfs_fallocate(fd, 0, 0, offset)) {
error_setg_errno(errp, errno, "Could not preallocate data");
return -errno;
}
break;
#endif /* CONFIG_GLUSTERFS_FALLOCATE */
#ifdef CONFIG_GLUSTERFS_ZEROFILL
case PREALLOC_MODE_FULL:
if (glfs_ftruncate(fd, offset)) {
error_setg_errno(errp, errno, "Could not resize file");
return -errno;
}
if (glfs_zerofill(fd, 0, offset)) {
error_setg_errno(errp, errno, "Could not zerofill the new area");
return -errno;
}
break;
#endif /* CONFIG_GLUSTERFS_ZEROFILL */
case PREALLOC_MODE_OFF:
if (glfs_ftruncate(fd, offset)) {
error_setg_errno(errp, errno, "Could not resize file");
return -errno;
}
break;
default:
error_setg(errp, "Unsupported preallocation mode: %s",
PreallocMode_str(prealloc));
return -EINVAL;
}
return 0;
}
static int qemu_gluster_create(const char *filename,
QemuOpts *opts, Error **errp)
{
@ -1019,40 +1058,7 @@ static int qemu_gluster_create(const char *filename,
goto out;
}
switch (prealloc) {
#ifdef CONFIG_GLUSTERFS_FALLOCATE
case PREALLOC_MODE_FALLOC:
if (glfs_fallocate(fd, 0, 0, total_size)) {
error_setg(errp, "Could not preallocate data for the new file");
ret = -errno;
}
break;
#endif /* CONFIG_GLUSTERFS_FALLOCATE */
#ifdef CONFIG_GLUSTERFS_ZEROFILL
case PREALLOC_MODE_FULL:
if (!glfs_ftruncate(fd, total_size)) {
if (glfs_zerofill(fd, 0, total_size)) {
error_setg(errp, "Could not zerofill the new file");
ret = -errno;
}
} else {
error_setg(errp, "Could not resize file");
ret = -errno;
}
break;
#endif /* CONFIG_GLUSTERFS_ZEROFILL */
case PREALLOC_MODE_OFF:
if (glfs_ftruncate(fd, total_size) != 0) {
ret = -errno;
error_setg(errp, "Could not resize file");
}
break;
default:
ret = -EINVAL;
error_setg(errp, "Unsupported preallocation mode: %s",
PreallocMode_str(prealloc));
break;
}
ret = qemu_gluster_do_truncate(fd, total_size, prealloc, errp);
out:
if (fd) {