search for: shutdown_pread

...) +{ + nbdkit_debug ("clean shutdown"); +} + +static void * +shutdown_open (int readonly) +{ + return NBDKIT_HANDLE_NOT_NEEDED; +} + +static int64_t +shutdown_get_size (void *handle) +{ + return INT64_C (1024*1024); +} + +#define THREAD_MODEL NBDKIT_THREAD_MODEL_PARALLEL + +static int +shutdown_pread (void *handle, void *buf, uint32_t count, uint64_t offset) +{ + memset (buf, 0, count); + return 0; +} + +/* Writing 0x55 to any location causes a shutdown. */ +static int +shutdown_pwrite (void *handle, const void *buf, uint32_t count, uint64_t offset) +{ + if (memchr (buf, 0x55, count) != NULL...

This adds a new nbdkit_shutdown() API whereby plugins and filters can request that the server shuts down (asynchronously) during the serving phase. Two new filters are added, one of which depends on this feature and the other not needing it but being somewhat related. Rich.