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...truct connection *conn) void unlock_request (struct connection *conn) { - int thread_model = backend->thread_model (backend); - debug ("release unload prevention lock"); pthread_rwlock_unlock (&unload_prevention_lock); diff --git a/src/main.c b/src/main.c index b3e6bad..90d464a 100644 --- a/src/main.c +++ b/src/main.c @@ -497,6 +497,7 @@ main (int argc, char *argv[]) } backend = open_plugin_so (filename, short_name); + lock_init_thread_model (); if (help) { usage (); -- 2.15.1

...plugin_init) (void)); + +/* filters.c */ +extern struct backend *filter_register (struct backend *next, size_t index, const char *filename, void *dl, struct nbdkit_filter *(*filter_init) (void)); /* locks.c */ extern void lock_init_thread_model (void); diff --git a/src/main.c b/src/main.c index 90d464a..29332c4 100644 --- a/src/main.c +++ b/src/main.c @@ -64,7 +64,8 @@ static int is_short_name (const char *); static char *make_random_fifo (void); -static struct backend *open_plugin_so (const char *filename, int short_name); +static struct backend *open_plugin_so (size_t i, const char *filenam...

...plugin_init) (void)); + +/* filters.c */ +extern struct backend *filter_register (struct backend *next, size_t index, const char *filename, void *dl, struct nbdkit_filter *(*filter_init) (void)); /* locks.c */ extern void lock_init_thread_model (void); diff --git a/src/main.c b/src/main.c index 90d464a..29332c4 100644 --- a/src/main.c +++ b/src/main.c @@ -64,7 +64,8 @@ static int is_short_name (const char *); static char *make_random_fifo (void); -static struct backend *open_plugin_so (const char *filename, int short_name); +static struct backend *open_plugin_so (size_t i, const char *filenam...

This is still tentative and needs a lot of work, but: - partition filter works, supporting MBR & GPT - prepare and finalize methods fixed - open method can now be changed (allowing readonly flag to be modified) - thread_model can be limited I believe I made most of the changes which were previously suggested in email. I think the only one I didn't was preventing inclusion of both

Rebased filters patch. Requires current git master + the locks / thread model fix (https://www.redhat.com/archives/libguestfs/2018-January/msg00128.html) So a few changes here since last time: The "introduce filters" and "implement filters" patches are squashed together. I introduced a concept of .prepare and .finalize. These run before and after the data serving phase