search for: nbd_get_init_flags

Displaying 4 results from an estimated 4 matches for "nbd_get_init_flags".

2020 Feb 10
1
[nbdkit PATCH 10/10] plugins: Wire up nbd plugin support for NBD_INFO_INIT_STATE
...rce and binary forms, with or without * modification, are permitted provided that the following conditions are @@ -702,6 +702,42 @@ nbdplug_can_extents (void *handle) return i; } +static int +nbdplug_init_sparse (void *handle) +{ + struct handle *h = handle; + int i = 0; + +#if LIBNBD_HAVE_NBD_GET_INIT_FLAGS + i = nbd_get_init_flags (h->nbd); + + if (i == -1) { + nbdkit_error ("failure to check init flags: %s", nbd_get_error ()); + return -1; + } + i = !!(i & LIBNBD_INIT_SPARSE); +#endif + return i; +} + +static int +nbdplug_init_zero (void *handle) +{ + struct handle *h =...
2020 Feb 10
0
[libnbd PATCH 1/1] generator: Add support for NBD_INFO_INIT_STATE extension
The NBD protocol is adding an extension for servers to report the initial state of the image (for now, whether it is sparse and/or reads as all zeroes). Time to expose this to clients, via the new API nbd_get_init_flags(). The patch requires refreshing the nbd-protocol.h file from a corresponding contemporary nbdkit commit. Testing is possible with recent enough qemu. --- .gitignore | 1 + generator/generator | 40 +++++++++++++-- generator/states-newstyle-opt-go.c | 12 +...
2020 Feb 10
17
Cross-project NBD extension proposal: NBD_INFO_INIT_STATE
I will be following up to this email with four separate threads each addressed to the appropriate single list, with proposed changes to: - the NBD protocol - qemu: both server and client - libnbd: client - nbdkit: server The feature in question adds a new optional NBD_INFO_ packet to the NBD_OPT_GO portion of handshake, adding up to 16 bits of information that the server can advertise to the
2020 Feb 10
2
[nbdkit PATCH 04/10] plugins: Wire up in-memory plugin support for NBD_INFO_INIT_STATE
...y data, so it doesn't need changes. The info plugin is never sparse, but can be all zeroes in base64exportname mode. Adding initial state support to file-based and language binding plugins will be done separately. Testing of this addition relies on a contemporary patch to libnbd adding a new nbd_get_init_flags() function for reading the advertised initial state, then demonstrating changes in state observable from the memory plugin over successive clients. Signed-off-by: Eric Blake <eblake@redhat.com> --- common/sparse/sparse.c | 30 +++++++++++++++++- common/sparse/sparse.h | 19 +++++++++++...