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;
}
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;
}