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block: Add .bdrv_truncate() error messages

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Add missing error messages for the block driver implementations of
.bdrv_truncate(); drop the generic one from block.c's bdrv_truncate().

Since one of these changes touches a mis-indented block in
block/file-posix.c, this patch fixes that coding style issue along the
way.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170328205129.15138-5-mreitz@redhat.com
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2017-03-28 22:51:29 +02:00
parent 4bff28b81a
commit f59adb3256
9 changed files with 34 additions and 10 deletions
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17
block/file-posix.c
View file

@ -1411,20 +1411,27 @@ static int raw_truncate(BlockDriverState *bs, int64_t offset, Error **errp)
{
BDRVRawState *s = bs->opaque;
struct stat st;
int ret;
if (fstat(s->fd, &st)) {
return -errno;
ret = -errno;
error_setg_errno(errp, -ret, "Failed to fstat() the file");
return ret;
}
if (S_ISREG(st.st_mode)) {
if (ftruncate(s->fd, offset) < 0) {
return -errno;
ret = -errno;
error_setg_errno(errp, -ret, "Failed to resize the file");
return ret;
}
} else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
if (offset > raw_getlength(bs)) {
return -EINVAL;
}
if (offset > raw_getlength(bs)) {
error_setg(errp, "Cannot grow device files");
return -EINVAL;
}
} else {
error_setg(errp, "Resizing this file is not supported");
return -ENOTSUP;
}