search for: test_layers_plugin_can_multi_conn

...est_layers_filter_flush, diff --git a/tests/test-layers-plugin.c b/tests/test-layers-plugin.c index 3befcc1..042ecc3 100644 --- a/tests/test-layers-plugin.c +++ b/tests/test-layers-plugin.c @@ -137,6 +137,13 @@ test_layers_plugin_can_fua (void *handle) return NBDKIT_FUA_NATIVE; } +static int +test_layers_plugin_can_multi_conn (void *handle) +{ + DEBUG_FUNCTION; + return 1; +} + static int test_layers_plugin_pread (void *handle, void *buf, uint32_t count, uint64_t offset, @@ -196,6 +203,7 @@ static struct nbdkit_plugin plugin = { .can_trim = test_layers_plugin_can_trim, .can_...

First thing to say is that I need to do a *lot* more testing on this, so this is just an early peek. In particular, although it passed ‘make check && make check-valgrind’ I have *not* tested it against a multi-conn-aware client such as the Linux kernel >= 4.9. This implements NBD_FLAG_CAN_MULTI_CONN, described in the protocol doc as: "NBD_FLAG_CAN_MULTI_CONN: Indicates that

For existing commits, this is almost identical to v1, except that I updated some commit messages and reordered the commits in a somewhat more logical sequence. The main changes are the extra commits: [06/11] plugins: Return NBD_FLAG_CAN_MULTI_CONN from some readonly plugins. - Readonly plugins that can set the flag unconditionally. [09/11] partitioning: Return NBD_FLAG_CAN_MULTI_CONN. [10/11]

I'm still working my way through the filters before this series will be complete, but this is enough of a start to at least get some feedback on the idea of implementing another NBD protocol extension. Eric Blake (9): server: Internal hooks for implementing NBD_CMD_CACHE plugins: Add .cache callback file, split: Implement .cache with posix_fadvise nbd: Implement NBD_CMD_CACHE

This has already been pushed upstream. I am simply posting these here so we have a reference in the mailing list in case we find bugs later (as I'm sure we will - it's a complex patch series). Great thanks to Eric Blake for tireless review on this one. It also seems to have identified a few minor bugs in qemu along the way. Rich.

Since v1: - rework .can_cache to be tri-state, with default of no advertisement (ripple effect through other patches) - add a lot more patches in order to round out filter support And in the meantime, Rich pushed NBD_CMD_CACHE support into libnbd, so in theory we now have a way to test cache commands through the entire stack. Eric Blake (24): server: Internal hooks for implementing