Пример #1
0
int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
                     struct ccc_grouplock *cg)
{
        struct lu_env          *env;
        struct cl_io           *io;
        struct cl_lock         *lock;
        struct cl_lock_descr   *descr;
        __u32                   enqflags;
        int                     refcheck;
        int                     rc;

        env = cl_env_get(&refcheck);
        if (IS_ERR(env))
                return PTR_ERR(env);

        io = ccc_env_thread_io(env);
        io->ci_obj = obj;
	io->ci_ignore_layout = 1;

	rc = cl_io_init(env, io, CIT_MISC, io->ci_obj);
	if (rc) {
		cl_io_fini(env, io);
		cl_env_put(env, &refcheck);
		/* Does not make sense to take GL for released layout */
		if (rc > 0)
			rc = -ENOTSUPP;
		return rc;
        }

        descr = &ccc_env_info(env)->cti_descr;
        descr->cld_obj = obj;
        descr->cld_start = 0;
        descr->cld_end = CL_PAGE_EOF;
        descr->cld_gid = gid;
        descr->cld_mode = CLM_GROUP;

	enqflags = CEF_MUST | (nonblock ? CEF_NONBLOCK : 0);
	descr->cld_enq_flags = enqflags;

	lock = cl_lock_request(env, io, descr, GROUPLOCK_SCOPE, current);
	if (IS_ERR(lock)) {
		cl_io_fini(env, io);
		cl_env_put(env, &refcheck);
		return PTR_ERR(lock);
	}

        cg->cg_env  = cl_env_get(&refcheck);
        cg->cg_io   = io;
        cg->cg_lock = lock;
        cg->cg_gid  = gid;
        LASSERT(cg->cg_env == env);

        cl_env_unplant(env, &refcheck);
        return 0;
}
Пример #2
0
int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
                     struct ccc_grouplock *cg)
{
        struct lu_env          *env;
        struct cl_io           *io;
        struct cl_lock         *lock;
        struct cl_lock_descr   *descr;
        __u32                   enqflags;
        int                     refcheck;
        int                     rc;

        env = cl_env_get(&refcheck);
        if (IS_ERR(env))
                return PTR_ERR(env);

        io = &ccc_env_info(env)->cti_io;
        io->ci_obj = obj;

        rc = cl_io_init(env, io, CIT_MISC, io->ci_obj);
        if (rc) {
                LASSERT(rc < 0);
                cl_env_put(env, &refcheck);
                return rc;
        }

        descr = &ccc_env_info(env)->cti_descr;
        descr->cld_obj = obj;
        descr->cld_start = 0;
        descr->cld_end = CL_PAGE_EOF;
        descr->cld_gid = gid;
        descr->cld_mode = CLM_GROUP;

        enqflags = CEF_MUST | (nonblock ? CEF_NONBLOCK : 0);
        descr->cld_enq_flags = enqflags;

        lock = cl_lock_request(env, io, descr, GROUPLOCK_SCOPE, cfs_current());
        if (IS_ERR(lock)) {
                cl_io_fini(env, io);
                cl_env_put(env, &refcheck);
                return PTR_ERR(lock);
        }

        cg->cg_env = cl_env_get(&refcheck);
        cg->cg_lock = lock;
        cg->cg_gid = gid;
        LASSERT(cg->cg_env == env);

        cl_env_unplant(env, &refcheck);
        return 0;
}