-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Implementation of cl_object for LOV layer.
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
+ * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com>
*/
-/** \addtogroup lov lov @{ */
-
#define DEBUG_SUBSYSTEM S_LOV
#include "lov_cl_internal.h"
+#include <lustre_debug.h>
+
+/** \addtogroup lov
+ * @{
+ */
/*****************************************************************************
*
struct lov_object *lov,
const struct cl_object_conf *conf,
union lov_layout_state *state);
- void (*llo_delete)(const struct lu_env *env, struct lov_object *lov,
+ int (*llo_delete)(const struct lu_env *env, struct lov_object *lov,
union lov_layout_state *state);
void (*llo_fini)(const struct lu_env *env, struct lov_object *lov,
union lov_layout_state *state);
union lov_layout_state *state);
int (*llo_print)(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *o);
- struct cl_page *(*llo_page_init)(const struct lu_env *env,
- struct cl_object *obj,
- struct cl_page *page,
- cfs_page_t *vmpage);
+ int (*llo_page_init)(const struct lu_env *env, struct cl_object *obj,
+ struct cl_page *page, cfs_page_t *vmpage);
int (*llo_lock_init)(const struct lu_env *env,
struct cl_object *obj, struct cl_lock *lock,
const struct cl_io *io);
struct lov_object *lov,
union lov_layout_state *state)
{
- lov->u = *state;
-}
-
-static void oinfo_get_fid(const struct lov_oinfo *oinfo, struct lu_fid *fid)
-{
- __u64 idx = oinfo->loi_id;
-
- /* See idif definition in wiki:CMD3_interoperability_architecture */
-
- LASSERT(oinfo->loi_gr < 1ULL << 16);
- LASSERT(oinfo->loi_id < 1ULL << 49);
- ENTRY;
-
- /*
- * Now that the fid of stripe is not unique now, ost_idx have to
- * be used to make it unique. This is ok because the stripe fids
- * are just used in client side(to locate the objects). -jay
- */
- fid->f_seq = ((__u64)oinfo->loi_ost_idx) << 32 |
- oinfo->loi_gr << 16 | idx >> 32;
- fid->f_oid = idx; /* truncated to 32 bits by assignment */
- fid->f_ver = 0;
- EXIT;
}
static struct cl_object *lov_sub_find(const struct lu_env *env,
struct lov_oinfo *oinfo;
int result;
+ if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
+ /* For sanity:test_206.
+ * Do not leave the object in cache to avoid accessing
+ * freed memory. This is because osc_object is referring to
+ * lov_oinfo of lsm_stripe_data which will be freed due to
+ * this failure. */
+ cl_object_kill(env, stripe);
+ cl_object_put(env, stripe);
+ return -EIO;
+ }
+
hdr = cl_object_header(lov2cl(lov));
subhdr = cl_object_header(stripe);
parent = subhdr->coh_parent;
- oinfo = r0->lo_lsm->lsm_oinfo[idx];
- CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: id: "LPU64" gr: "LPU64
+ oinfo = lov->lo_lsm->lsm_oinfo[idx];
+ CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: id: "LPU64" seq: "LPU64
" idx: %d gen: %d\n",
PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
PFID(&hdr->coh_lu.loh_fid), hdr,
- oinfo->loi_id, oinfo->loi_gr,
+ oinfo->loi_id, oinfo->loi_seq,
oinfo->loi_ost_idx, oinfo->loi_ost_gen);
if (parent == NULL) {
r0->lo_sub[idx]->lso_index = idx;
result = 0;
} else {
- CERROR("Stripe is already owned by other file (%i).\n", idx);
+ CERROR("Stripe is already owned by other file (%d).\n", idx);
LU_OBJECT_DEBUG(D_ERROR, env, &stripe->co_lu, "\n");
LU_OBJECT_DEBUG(D_ERROR, env, lu_object_top(&parent->coh_lu),
"old\n");
struct lov_layout_raid0 *r0 = &state->raid0;
ENTRY;
- r0->lo_nr = conf->u.coc_md->lsm->lsm_stripe_count;
- r0->lo_lsm = conf->u.coc_md->lsm;
+
+ if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
+ dump_lsm(D_ERROR, lsm);
+ LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
+ LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
+ }
+
+ LASSERT(lov->lo_lsm == NULL);
+ lov->lo_lsm = lsm_addref(lsm);
+ r0->lo_nr = lsm->lsm_stripe_count;
LASSERT(r0->lo_nr <= lov_targets_nr(dev));
- OBD_ALLOC(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
+ OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
if (r0->lo_sub != NULL) {
result = 0;
subconf->coc_inode = conf->coc_inode;
+ spin_lock_init(&r0->lo_sub_lock);
/*
* Create stripe cl_objects.
*/
struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
int ost_idx = oinfo->loi_ost_idx;
- oinfo_get_fid(oinfo, ofid);
+ fid_ostid_unpack(ofid, &oinfo->loi_oi,
+ oinfo->loi_ost_idx);
subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
subconf->u.coc_oinfo = oinfo;
+ LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
+ /* In the function below, .hs_keycmp resolves to
+ * lu_obj_hop_keycmp() */
+ /* coverity[overrun-buffer-val] */
stripe = lov_sub_find(env, subdev, ofid, subconf);
if (!IS_ERR(stripe))
result = lov_init_sub(env, lov, stripe, r0, i);
RETURN(result);
}
-static void lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
- union lov_layout_state *state)
+static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
+ union lov_layout_state *state)
{
- LASSERT(lov->lo_type == LLT_EMPTY);
+ LASSERT(lov->lo_type == LLT_EMPTY);
+ cl_object_prune(env, &lov->lo_cl);
+ return 0;
}
static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
struct cl_object *sub;
struct lov_layout_raid0 *r0;
struct lu_site *site;
+ struct lu_site_bkt_data *bkt;
cfs_waitlink_t *waiter;
r0 = &lov->u.raid0;
- sub = lovsub2cl(los);
LASSERT(r0->lo_sub[idx] == los);
+ sub = lovsub2cl(los);
+ site = sub->co_lu.lo_dev->ld_site;
+ bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
+
cl_object_kill(env, sub);
/* release a reference to the sub-object and ... */
lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
* ->lo_sub[] slot in lovsub_object_fini() */
if (r0->lo_sub[idx] == los) {
waiter = &lov_env_info(env)->lti_waiter;
- site = sub->co_lu.lo_dev->ld_site;
cfs_waitlink_init(waiter);
- cfs_waitq_add(&site->ls_marche_funebre, waiter);
- set_current_state(CFS_TASK_UNINT);
-
- while (r0->lo_sub[idx] == los)
+ cfs_waitq_add(&bkt->lsb_marche_funebre, waiter);
+ cfs_set_current_state(CFS_TASK_UNINT);
+ while (1) {
/* this wait-queue is signaled at the end of
* lu_object_free(). */
- cfs_waitq_wait(waiter, CFS_TASK_UNINT);
- cfs_waitq_del(&site->ls_marche_funebre, waiter);
+ cfs_set_current_state(CFS_TASK_UNINT);
+ spin_lock(&r0->lo_sub_lock);
+ if (r0->lo_sub[idx] == los) {
+ spin_unlock(&r0->lo_sub_lock);
+ cfs_waitq_wait(waiter, CFS_TASK_UNINT);
+ } else {
+ spin_unlock(&r0->lo_sub_lock);
+ cfs_set_current_state(CFS_TASK_RUNNING);
+ break;
+ }
+ }
+ cfs_waitq_del(&bkt->lsb_marche_funebre, waiter);
}
LASSERT(r0->lo_sub[idx] == NULL);
}
-static void lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
- union lov_layout_state *state)
+static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
+ union lov_layout_state *state)
{
- struct lov_layout_raid0 *r0 = &state->raid0;
- int i;
+ struct lov_layout_raid0 *r0 = &state->raid0;
+ struct lov_stripe_md *lsm = lov->lo_lsm;
+ int i;
+
+ ENTRY;
+
+ dump_lsm(D_INODE, lsm);
+ if (lov->lo_lsm_invalid && cfs_atomic_read(&lsm->lsm_refc) > 1)
+ RETURN(-EBUSY);
- ENTRY;
if (r0->lo_sub != NULL) {
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);
+ }
}
}
- EXIT;
+ RETURN(0);
}
static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
union lov_layout_state *state)
{
- struct lov_layout_raid0 *r0 = &state->raid0;
+ struct lov_layout_raid0 *r0 = &state->raid0;
+ ENTRY;
- ENTRY;
- if (r0->lo_sub != NULL) {
- OBD_FREE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
- r0->lo_sub = NULL;
- }
- EXIT;
+ if (r0->lo_sub != NULL) {
+ OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
+ r0->lo_sub = NULL;
+ }
+
+ dump_lsm(D_INODE, lov->lo_lsm);
+ lov_free_memmd(&lov->lo_lsm);
+
+ EXIT;
}
static int lov_print_empty(const struct lu_env *env, void *cookie,
static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
struct cl_attr *attr)
{
- struct lov_object *lov = cl2lov(obj);
- struct lov_layout_raid0 *r0 = lov_r0(lov);
- struct lov_stripe_md *lsm = lov->u.raid0.lo_lsm;
+ struct lov_object *lov = cl2lov(obj);
+ struct lov_layout_raid0 *r0 = lov_r0(lov);
+ struct lov_stripe_md *lsm = lov->lo_lsm;
struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
__u64 kms;
int result = 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.
+ * 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) {
/*
* Fill LVB with attributes already initialized by the upper
.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_dispatch[__llt].op(__VA_ARGS__); \
})
+static inline void lov_conf_freeze(struct lov_object *lov)
+{
+ if (lov->lo_owner != cfs_current())
+ down_read(&lov->lo_type_guard);
+}
+
+static inline void lov_conf_thaw(struct lov_object *lov)
+{
+ if (lov->lo_owner != cfs_current())
+ up_read(&lov->lo_type_guard);
+}
+
#define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
({ \
struct lov_object *__obj = (obj); \
int __lock = !!(lock); \
typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
\
- __lock &= __obj->lo_owner != cfs_current(); \
if (__lock) \
- down_read(&__obj->lo_type_guard); \
+ lov_conf_freeze(__obj); \
__result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
if (__lock) \
- up_read(&__obj->lo_type_guard); \
+ lov_conf_thaw(__obj); \
__result; \
})
struct lov_object *__obj = (obj); \
enum lov_layout_type __llt; \
\
- if (__obj->lo_owner != cfs_current()) \
- down_read(&__obj->lo_type_guard); \
+ lov_conf_freeze(__obj); \
__llt = __obj->lo_type; \
LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
lov_dispatch[__llt].op(__VA_ARGS__); \
- if (__obj->lo_owner != cfs_current()) \
- up_read(&__obj->lo_type_guard); \
+ lov_conf_thaw(__obj); \
} while (0)
-static int lov_layout_change(const struct lu_env *env,
- struct lov_object *obj, enum lov_layout_type llt,
- const struct cl_object_conf *conf)
+static void lov_conf_lock(struct lov_object *lov)
{
- int result;
- union lov_layout_state *state = &lov_env_info(env)->lti_state;
- const struct lov_layout_operations *old_ops;
- const struct lov_layout_operations *new_ops;
+ LASSERT(lov->lo_owner != cfs_current());
+ down_write(&lov->lo_type_guard);
+ LASSERT(lov->lo_owner == NULL);
+ lov->lo_owner = cfs_current();
+}
- LASSERT(0 <= obj->lo_type && obj->lo_type < ARRAY_SIZE(lov_dispatch));
- LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
- ENTRY;
+static void lov_conf_unlock(struct lov_object *lov)
+{
+ lov->lo_owner = NULL;
+ up_write(&lov->lo_type_guard);
+}
- old_ops = &lov_dispatch[obj->lo_type];
- new_ops = &lov_dispatch[llt];
-
- result = new_ops->llo_init(env, lu2lov_dev(obj->lo_cl.co_lu.lo_dev),
- obj, conf, state);
- if (result == 0) {
- struct cl_object_header *hdr = cl_object_header(&obj->lo_cl);
- void *cookie;
- struct lu_env *nested;
- int refcheck;
-
- cookie = cl_env_reenter();
- nested = cl_env_get(&refcheck);
- if (!IS_ERR(nested))
- cl_object_prune(nested, &obj->lo_cl);
- else
- result = PTR_ERR(nested);
- cl_env_put(nested, &refcheck);
- cl_env_reexit(cookie);
-
- old_ops->llo_fini(env, obj, &obj->u);
- LASSERT(list_empty(&hdr->coh_locks));
- LASSERT(hdr->coh_tree.rnode == NULL);
- LASSERT(hdr->coh_pages == 0);
-
- new_ops->llo_install(env, obj, state);
- obj->lo_type = llt;
- } else
- new_ops->llo_fini(env, obj, state);
- RETURN(result);
+static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
+{
+ struct l_wait_info lwi = { 0 };
+ struct lov_stripe_md *lsm = lov->lo_lsm;
+ ENTRY;
+
+ if (!lov->lo_lsm_invalid || lsm == NULL)
+ RETURN(0);
+
+ LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 0);
+ while (cfs_atomic_read(&lsm->lsm_refc) > 1 && lov->lo_lsm_invalid) {
+ lov_conf_unlock(lov);
+
+ CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
+ PFID(lu_object_fid(lov2lu(lov))),
+ cfs_atomic_read(&lsm->lsm_refc));
+
+ 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 *unused,
+ struct lov_object *lov, enum lov_layout_type llt,
+ const struct cl_object_conf *conf)
+{
+ int result;
+ union lov_layout_state *state = &lov->u;
+ const struct lov_layout_operations *old_ops;
+ const struct lov_layout_operations *new_ops;
+
+ struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
+ void *cookie;
+ struct lu_env *env;
+ int refcheck;
+
+ LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
+ LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
+ ENTRY;
+
+ cookie = cl_env_reenter();
+ 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];
+
+ result = old_ops->llo_delete(env, lov, &lov->u);
+ if (result == 0) {
+ old_ops->llo_fini(env, lov, &lov->u);
+ LASSERT(cfs_list_empty(&hdr->coh_locks));
+ LASSERT(hdr->coh_tree.rnode == NULL);
+ LASSERT(hdr->coh_pages == 0);
+
+ lov->lo_type = LLT_EMPTY;
+ result = new_ops->llo_init(env,
+ lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
+ lov, conf, state);
+ if (result == 0) {
+ new_ops->llo_install(env, lov, state);
+ lov->lo_type = llt;
+ } else {
+ new_ops->llo_delete(env, lov, state);
+ new_ops->llo_fini(env, lov, state);
+ /* this file becomes an EMPTY file. */
+ }
+ }
+
+ cl_env_put(env, &refcheck);
+ cl_env_reexit(cookie);
+ RETURN(result);
}
/*****************************************************************************
struct lov_device *dev = lu2lov_dev(obj->lo_dev);
struct lov_object *lov = lu2lov(obj);
const struct cl_object_conf *cconf = lu2cl_conf(conf);
- union lov_layout_state *set = &lov_env_info(env)->lti_state;
+ union lov_layout_state *set = &lov->u;
const struct lov_layout_operations *ops;
int result;
ENTRY;
- init_rwsem(&lov->lo_type_guard);
+ init_rwsem(&lov->lo_type_guard);
+ cfs_waitq_init(&lov->lo_waitq);
+
+ cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
/* no locking is necessary, as object is being created */
lov->lo_type = cconf->u.coc_md->lsm != NULL ? LLT_RAID0 : LLT_EMPTY;
result = ops->llo_init(env, dev, lov, cconf, set);
if (result == 0)
ops->llo_install(env, lov, set);
- else
- ops->llo_fini(env, lov, set);
RETURN(result);
}
static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
const struct cl_object_conf *conf)
{
- struct lov_object *lov = cl2lov(obj);
- int result;
-
- ENTRY;
- /*
- * Currently only LLT_EMPTY -> LLT_RAID0 transition is supported.
- */
- LASSERT(lov->lo_owner != cfs_current());
- down_write(&lov->lo_type_guard);
- LASSERT(lov->lo_owner == NULL);
- lov->lo_owner = cfs_current();
- if (lov->lo_type == LLT_EMPTY && conf->u.coc_md->lsm != NULL)
- result = lov_layout_change(env, lov, LLT_RAID0, conf);
- else
- result = -EOPNOTSUPP;
- lov->lo_owner = NULL;
- up_write(&lov->lo_type_guard);
- RETURN(result);
+ struct lov_stripe_md *lsm = NULL;
+ struct lov_object *lov = cl2lov(obj);
+ int result = 0;
+ ENTRY;
+
+ lov_conf_lock(lov);
+ if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
+ lov->lo_lsm_invalid = 1;
+ GOTO(out, result = 0);
+ }
+
+ if (conf->coc_opc == OBJECT_CONF_WAIT) {
+ result = lov_layout_wait(env, lov);
+ GOTO(out, result);
+ }
+
+ LASSERT(conf->coc_opc == OBJECT_CONF_SET);
+
+ if (conf->u.coc_md != NULL)
+ lsm = conf->u.coc_md->lsm;
+ if ((lsm == NULL && lov->lo_lsm == NULL) ||
+ (lsm != NULL && lov->lo_lsm != NULL &&
+ lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen)) {
+ /* same version of layout */
+ lov->lo_lsm_invalid = 0;
+ GOTO(out, result = 0);
+ }
+
+ /* will change layout - check if there still exists active IO. */
+ if (lov->lo_lsm != NULL &&
+ cfs_atomic_read(&lov->lo_lsm->lsm_refc) > 1) {
+ lov->lo_lsm_invalid = 1;
+ GOTO(out, result = -EBUSY);
+ }
+
+ /*
+ * Only LLT_EMPTY <-> LLT_RAID0 transitions are supported.
+ */
+ switch (lov->lo_type) {
+ case LLT_EMPTY:
+ if (lsm != NULL)
+ result = lov_layout_change(env, lov, LLT_RAID0, conf);
+ break;
+ case LLT_RAID0:
+ if (lsm == NULL)
+ result = lov_layout_change(env, lov, LLT_EMPTY, conf);
+ else if (lov_stripe_md_cmp(lov->lo_lsm, lsm))
+ result = -EOPNOTSUPP;
+ break;
+ default:
+ LBUG();
+ }
+ lov->lo_lsm_invalid = result != 0;
+ EXIT;
+
+out:
+ lov_conf_unlock(lov);
+ RETURN(result);
}
static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
return LOV_2DISPATCH(lu2lov(o), llo_print, env, cookie, p, o);
}
-struct cl_page *lov_page_init(const struct lu_env *env, struct cl_object *obj,
- struct cl_page *page, cfs_page_t *vmpage)
+int 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);
}
/**
* layer. Dispatches to the appropriate layout io initialization method.
*/
int lov_io_init(const struct lu_env *env, struct cl_object *obj,
- struct cl_io *io)
+ struct cl_io *io)
{
- CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
- /*
- * Do not take lock in case of CIT_MISC io, because
- *
- * - if this is an io for a glimpse, then we don't care;
- *
- * - if this not a glimpse (writepage or lock cancellation), then
- * layout change cannot happen because a page or a lock
- * already exist; and
- *
- * - lock ordering (lock mutex nests within layout rw-semaphore)
- * is obeyed in case of lock cancellation.
- */
- return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
- io->ci_type != CIT_MISC, env, obj, io);
+ CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
+ return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
+ !io->ci_ignore_layout, env, obj, io);
}
/**
}
int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
- struct cl_lock *lock, const struct cl_io *io)
+ struct cl_lock *lock, const struct cl_io *io)
{
- return LOV_2DISPATCH(cl2lov(obj), llo_lock_init, env, obj, lock, io);
+ /* No need to lock because we've taken one refcount of layout. */
+ return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
+ io);
}
static const struct cl_object_operations lov_ops = {
};
struct lu_object *lov_object_alloc(const struct lu_env *env,
- const struct lu_object_header *_,
+ const struct lu_object_header *unused,
struct lu_device *dev)
{
struct lov_object *lov;
struct lu_object *obj;
ENTRY;
- OBD_SLAB_ALLOC_PTR(lov, lov_object_kmem);
+ OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, CFS_ALLOC_IO);
if (lov != NULL) {
obj = lov2lu(lov);
lu_object_init(obj, NULL, dev);
RETURN(obj);
}
+struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
+{
+ struct lov_stripe_md *lsm = NULL;
+
+ lov_conf_freeze(lov);
+ if (lov->lo_lsm != NULL) {
+ lsm = lsm_addref(lov->lo_lsm);
+ 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;
+}
+
+void lov_lsm_decref(struct lov_object *lov, struct lov_stripe_md *lsm)
+{
+ if (lsm == NULL)
+ return;
+
+ CDEBUG(D_INODE, "lsm %p decref %d by %p.\n",
+ lsm, cfs_atomic_read(&lsm->lsm_refc), cfs_current());
+
+ if (lov_free_memmd(&lsm) <= 1 && lov->lo_lsm_invalid)
+ cfs_waitq_signal(&lov->lo_waitq);
+}
+
+struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
+{
+ struct lu_object *luobj;
+ struct lov_stripe_md *lsm = NULL;
+
+ if (clobj == NULL)
+ return NULL;
+
+ luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
+ &lov_device_type);
+ if (luobj != NULL)
+ lsm = lov_lsm_addref(lu2lov(luobj));
+ return lsm;
+}
+EXPORT_SYMBOL(lov_lsm_get);
+
+void lov_lsm_put(struct cl_object *clobj, struct lov_stripe_md *lsm)
+{
+ struct lu_object *luobj;
+
+ if (clobj == NULL || lsm == NULL)
+ return;
+
+ luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
+ &lov_device_type);
+ LASSERT(luobj != NULL);
+
+ lov_lsm_decref(lu2lov(luobj), lsm);
+}
+EXPORT_SYMBOL(lov_lsm_put);
+
+int lov_read_and_clear_async_rc(struct cl_object *clob)
+{
+ struct lu_object *luobj;
+ int rc = 0;
+ ENTRY;
+
+ luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
+ &lov_device_type);
+ if (luobj != NULL) {
+ struct lov_object *lov = lu2lov(luobj);
+
+ lov_conf_freeze(lov);
+ switch (lov->lo_type) {
+ case LLT_RAID0: {
+ struct lov_stripe_md *lsm;
+ int i;
+
+ lsm = lov->lo_lsm;
+ LASSERT(lsm != NULL);
+ for (i = 0; i < lsm->lsm_stripe_count; i++) {
+ struct lov_oinfo *loi = lsm->lsm_oinfo[i];
+ if (loi->loi_ar.ar_rc && !rc)
+ rc = loi->loi_ar.ar_rc;
+ loi->loi_ar.ar_rc = 0;
+ }
+ }
+ case LLT_EMPTY:
+ break;
+ default:
+ LBUG();
+ }
+ lov_conf_thaw(lov);
+ }
+ RETURN(rc);
+}
+EXPORT_SYMBOL(lov_read_and_clear_async_rc);
+
/** @} lov */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff