[Xen-devel] blktap2 and pygrub: error

[eXeC001er <execooler@xxxxxxxxx>]

Hi.

I tried ti use VHD-disk-image for my Opensolaris DomU. 

Installation on this disk is fine, but i cannot to boot from it.

in logs "Disk isn't accessible";

I mount image and tried to use pygrub directly:

pygrub /dev/xvdp

Traceback (most recent call last):

  File "/usr/bin/pygrub", line 705, in <module>

    fs = fsimage.open(file, get_fs_offset(file))

IOError: [Errno 95] Operation not supported

but i can 'dd' from it device-file.

I researched this issue:

error returned from:

*** xen-src-root/tools/pygrub/src/fsimage/fsimage.c ***

static PyObject *

fsimage_open(PyObject *o, PyObject *args, PyObject *kwargs)

{

        static char *kwlist[] = { "name", "offset", "options", NULL };

        char *name;

        char *options = NULL;

        uint64_t offset = 0;

        fsimage_fs_t *fs;

        if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|Ls", kwlist,

            &name, &offset, &options))

                return (NULL);

        if ((fs = PyObject_NEW(fsimage_fs_t, &fsimage_fs_type)) == NULL)

                return (NULL);

        if ((fs->fs = fsi_open_fsimage(name, offset, options)) == NULL) {

                PyErr_SetFromErrno(PyExc_IOError);     <<<<<<<<<<<<<<<<<<<<<<<<

                return (NULL);

        }

        return (PyObject *)fs;

}

*** xen-src-root/tools/libfsimage/common/fsimage.c ***

fsi_t *fsi_open_fsimage(const char *path, uint64_t off, const char *options)

{

        fsi_t *fsi = NULL;

        int fd;

        int err;

        if ((fd = open(path, O_RDONLY)) == -1)       <<<<<<<<<<<<<<<<<<<<<<

                goto fail;

        if ((fsi = malloc(sizeof(*fsi))) == NULL)

                goto fail;

        fsi->f_fd = fd;

        fsi->f_off = off;

        fsi->f_data = NULL;

        fsi->f_bootstring = NULL;

        pthread_mutex_lock(&fsi_lock);

        err = find_plugin(fsi, path, options);

        pthread_mutex_unlock(&fsi_lock);

        if (err != 0)

                goto fail;

        return (fsi);

fail:

        err = errno;

        if (fd != -1)

                (void) close(fd);

        free(fsi);

        errno = err;

        return (NULL);

}

If i use 'file:/' type of disk-image (i have other disk-image) then all ok.

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