union lov_layout_state *state)
{
LASSERT(lov->lo_type == LLT_EMPTY);
+ cl_object_prune(env, &lov->lo_cl);
return 0;
}
for (i = 0; i < r0->lo_nr; ++i) {
struct lovsub_object *los = r0->lo_sub[i];
- if (los != NULL)
+ if (los != NULL) {
+ cl_locks_prune(env, &los->lso_cl, 1);
/*
* If top-level object is to be evicted from
* the cache, so are its sub-objects.
*/
lov_subobject_kill(env, lov, los, i);
+ }
}
}
RETURN(0);
ENTRY;
/* this is called w/o holding type guard mutex, so it must be inside
- * an on going IO otherwise lsm may be replaced. */
- LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 1);
+ * an on going IO otherwise lsm may be replaced.
+ * LU-2117: it turns out there exists one exception. For mmaped files,
+ * the lock of those files may be requested in the other file's IO
+ * context, and this function is called in ccc_lock_state(), it will
+ * hit this assertion.
+ * Anyway, it's still okay to call attr_get w/o type guard as layout
+ * can't go if locks exist. */
+ /* LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 1); */
if (!r0->lo_attr_valid) {
/*
.llo_install = lov_install_empty,
.llo_print = lov_print_empty,
.llo_page_init = lov_page_init_empty,
- .llo_lock_init = NULL,
+ .llo_lock_init = lov_lock_init_empty,
.llo_io_init = lov_io_init_empty,
.llo_getattr = lov_attr_get_empty
},
lov_conf_thaw(__obj); \
} while (0)
+static void lov_conf_lock(struct lov_object *lov)
+{
+ LASSERT(lov->lo_owner != cfs_current());
+ cfs_down_write(&lov->lo_type_guard);
+ LASSERT(lov->lo_owner == NULL);
+ lov->lo_owner = cfs_current();
+}
+
+static void lov_conf_unlock(struct lov_object *lov)
+{
+ lov->lo_owner = NULL;
+ cfs_up_write(&lov->lo_type_guard);
+}
+
static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
{
struct l_wait_info lwi = { 0 };
if (!lov->lo_lsm_invalid || lsm == NULL)
RETURN(0);
- l_wait_event(lov->lo_waitq, cfs_atomic_read(&lsm->lsm_refc) == 1, &lwi);
+ LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 0);
+ while (cfs_atomic_read(&lsm->lsm_refc) > 1) {
+ lov_conf_unlock(lov);
+ l_wait_event(lov->lo_waitq,
+ cfs_atomic_read(&lsm->lsm_refc) == 1, &lwi);
+ lov_conf_lock(lov);
+ }
RETURN(0);
}
-static int lov_layout_change(const struct lu_env *env,
+static int lov_layout_change(const struct lu_env *unused,
struct lov_object *lov, enum lov_layout_type llt,
const struct cl_object_conf *conf)
{
struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
void *cookie;
- struct lu_env *nested;
+ struct lu_env *env;
int refcheck;
LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
ENTRY;
cookie = cl_env_reenter();
- nested = cl_env_get(&refcheck);
- if (!IS_ERR(nested))
- cl_object_prune(nested, &lov->lo_cl);
- else
- result = PTR_ERR(nested);
- cl_env_put(nested, &refcheck);
- cl_env_reexit(cookie);
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env)) {
+ cl_env_reexit(cookie);
+ RETURN(PTR_ERR(env));
+ }
old_ops = &lov_dispatch[lov->lo_type];
new_ops = &lov_dispatch[llt];
/* this file becomes an EMPTY file. */
}
}
+
+ cl_env_put(env, &refcheck);
+ cl_env_reexit(cookie);
RETURN(result);
}
static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
const struct cl_object_conf *conf)
{
- struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
+ struct lov_stripe_md *lsm = NULL;
struct lov_object *lov = cl2lov(obj);
int result = 0;
ENTRY;
- /*
- * Only LLT_EMPTY <-> LLT_RAID0 transitions are supported.
- */
- LASSERT(lov->lo_owner != cfs_current());
- cfs_down_write(&lov->lo_type_guard);
- LASSERT(lov->lo_owner == NULL);
- lov->lo_owner = cfs_current();
-
+ lov_conf_lock(lov);
if (conf->coc_invalidate) {
lov->lo_lsm_invalid = 1;
GOTO(out, result = 0);
}
- if (conf->coc_validate_only) {
- if (!lov->lo_lsm_invalid)
- GOTO(out, result = 0);
+ if (conf->u.coc_md != NULL)
+ lsm = conf->u.coc_md->lsm;
- lov_layout_wait(env, lov);
- /* fall through to set up new layout */
+ if ((lsm == NULL && lov->lo_lsm == NULL) ||
+ (lsm != NULL && lov->lo_lsm != NULL &&
+ lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen)) {
+ lov->lo_lsm_invalid = 0;
+ GOTO(out, result = 0);
}
+ /* will change layout */
+ lov_layout_wait(env, lov);
+
+ /*
+ * Only LLT_EMPTY <-> LLT_RAID0 transitions are supported.
+ */
switch (lov->lo_type) {
case LLT_EMPTY:
if (lsm != NULL)
EXIT;
out:
- lov->lo_owner = NULL;
- cfs_up_write(&lov->lo_type_guard);
+ lov_conf_unlock(lov);
RETURN(result);
}
struct cl_page *lov_page_init(const struct lu_env *env, struct cl_object *obj,
struct cl_page *page, cfs_page_t *vmpage)
{
- return LOV_2DISPATCH(cl2lov(obj),
- llo_page_init, env, obj, page, vmpage);
+ return LOV_2DISPATCH_NOLOCK(cl2lov(obj),
+ llo_page_init, env, obj, page, vmpage);
}
/**
int lov_io_init(const struct lu_env *env, struct cl_object *obj,
struct cl_io *io)
{
- struct lov_io *lio = lov_env_io(env);
-
CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
-
- /* hold lsm before initializing because io relies on it */
- lio->lis_lsm = lov_lsm_addref(cl2lov(obj));
-
- /* No need to lock because we've taken one refcount of layout. */
- return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_io_init, env, obj, io);
+ return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
+ !io->ci_ignore_layout, env, obj, io);
}
/**
struct lov_stripe_md *lsm = NULL;
lov_conf_freeze(lov);
- if (!lov->lo_lsm_invalid && lov->lo_lsm != NULL) {
+ if (lov->lo_lsm != NULL) {
lsm = lsm_addref(lov->lo_lsm);
- CDEBUG(D_INODE, "lsm %p addref %d by %p.\n",
- lsm, cfs_atomic_read(&lsm->lsm_refc), cfs_current());
+ CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
+ lsm, cfs_atomic_read(&lsm->lsm_refc),
+ lov->lo_lsm_invalid, cfs_current());
}
lov_conf_thaw(lov);
return lsm;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff