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...i@eu.citrix.com> diff -r 85bd0f6e8fed tools/libxl/libxl_device.c --- a/tools/libxl/libxl_device.c Fri Aug 13 13:55:51 2010 +0100 +++ b/tools/libxl/libxl_device.c Fri Aug 13 19:23:05 2010 +0100 @@ -76,21 +76,21 @@ retry_transaction: t = xs_transaction_start(ctx->xsh); /* FIXME: read frontend_path and check state before removing stuff */ - xs_rm(ctx->xsh, t, frontend_path); - xs_rm(ctx->xsh, t, backend_path); + if (fents) { + xs_rm(ctx->xsh, t, frontend_path); + xs_mkdir(ctx->xsh, t, frontend_path); + xs_set_permissions(ctx->xsh, t, frontend_pat...

This patch series introduces the tapback daemon, the user space daemon that acts as a device''s back-end, essentially most of blkback in user space. The daemon is responsible for coordinating the front-end and tapdisk. It creates tapdisk process as needed, instructs them to connect to/disconnect from the shared ring, and manages the state of the back-end. The shared ring between the

...hu Aug 12 15:22:56 2010 +0100 @@ -42,20 +42,24 @@ static const char *string_of_kinds[] = { int libxl_device_generic_add(libxl_ctx *ctx, libxl_device *device, char **bents, char **fents) { + libxl_gc gc = LIBXL_INIT_GC(ctx); char *dom_path_backend, *dom_path, *frontend_path, *backend_path; xs_transaction_t t; struct xs_permissions frontend_perms[2]; struct xs_permissions backend_perms[2]; + int rc; - if (!is_valid_device_kind(device->backend_kind) || !is_valid_device_kind(device->kind)) - return ERROR_INVAL; + if (!is_valid_devic...