*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2013, Intel Corporation.
+ * Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#define DEBUG_SUBSYSTEM S_LOV
+#include <linux/random.h>
+
#include "lov_cl_internal.h"
-#include "lclient.h"
+
+static inline struct lov_device *lov_object_dev(struct lov_object *obj)
+{
+ return lu2lov_dev(obj->lo_cl.co_lu.lo_dev);
+}
/** \addtogroup lov
* @{
*/
struct lov_layout_operations {
- int (*llo_init)(const struct lu_env *env, struct lov_device *dev,
- struct lov_object *lov,
- const struct cl_object_conf *conf,
- union lov_layout_state *state);
+ int (*llo_init)(const struct lu_env *env, struct lov_device *dev,
+ struct lov_object *lov, struct lov_stripe_md *lsm,
+ const struct cl_object_conf *conf,
+ union lov_layout_state *state);
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);
- void (*llo_install)(const struct lu_env *env, struct lov_object *lov,
- union lov_layout_state *state);
int (*llo_print)(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *o);
int (*llo_page_init)(const struct lu_env *env, struct cl_object *obj,
struct cl_object *obj, struct cl_io *io);
int (*llo_getattr)(const struct lu_env *env, struct cl_object *obj,
struct cl_attr *attr);
+ int (*llo_flush)(const struct lu_env *env, struct cl_object *obj,
+ struct ldlm_lock *lock);
};
static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov);
-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 *unused, struct lov_stripe_md *lsm)
+static void lov_lsm_put(struct lov_stripe_md *lsm)
{
if (lsm != NULL)
lov_free_memmd(&lsm);
}
-EXPORT_SYMBOL(lov_lsm_put);
/*****************************************************************************
*
*
*/
-static void lov_install_empty(const struct lu_env *env,
- struct lov_object *lov,
- union lov_layout_state *state)
+static struct cl_object *lov_sub_find(const struct lu_env *env,
+ struct cl_device *dev,
+ const struct lu_fid *fid,
+ const struct cl_object_conf *conf)
{
- /*
- * File without objects.
- */
-}
+ struct lu_object *o;
-static int lov_init_empty(const struct lu_env *env,
- struct lov_device *dev, struct lov_object *lov,
- const struct cl_object_conf *conf,
- union lov_layout_state *state)
-{
- return 0;
-}
+ ENTRY;
-static void lov_install_raid0(const struct lu_env *env,
- struct lov_object *lov,
- union lov_layout_state *state)
-{
+ o = lu_object_find_at(env, cl2lu_dev(dev), fid, &conf->coc_lu);
+ LASSERT(ergo(!IS_ERR(o), o->lo_dev->ld_type == &lovsub_device_type));
+ RETURN(lu2cl(o));
}
-static struct cl_object *lov_sub_find(const struct lu_env *env,
- struct cl_device *dev,
- const struct lu_fid *fid,
- const struct cl_object_conf *conf)
+static int lov_page_slice_fixup(struct lov_object *lov,
+ struct cl_object *stripe)
{
- struct lu_object *o;
+ struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
+ struct cl_object *o;
- ENTRY;
- o = lu_object_find_at(env, cl2lu_dev(dev), fid, &conf->coc_lu);
- LASSERT(ergo(!IS_ERR(o), o->lo_dev->ld_type == &lovsub_device_type));
- RETURN(lu2cl(o));
+ if (stripe == NULL)
+ return hdr->coh_page_bufsize - lov->lo_cl.co_slice_off -
+ cfs_size_round(sizeof(struct lov_page));
+
+ cl_object_for_each(o, stripe)
+ o->co_slice_off += hdr->coh_page_bufsize;
+
+ return cl_object_header(stripe)->coh_page_bufsize;
}
static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
- struct cl_object *stripe, struct lov_layout_raid0 *r0,
+ struct cl_object *subobj, struct lov_oinfo *oinfo,
int idx)
{
struct cl_object_header *hdr;
struct cl_object_header *subhdr;
struct cl_object_header *parent;
- struct lov_oinfo *oinfo;
+ int entry = lov_comp_entry(idx);
+ int stripe = lov_comp_stripe(idx);
int result;
if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
* 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);
+ cl_object_kill(env, subobj);
+ cl_object_put(env, subobj);
return -EIO;
}
- hdr = cl_object_header(lov2cl(lov));
- subhdr = cl_object_header(stripe);
+ hdr = cl_object_header(lov2cl(lov));
+ subhdr = cl_object_header(subobj);
- oinfo = lov->lo_lsm->lsm_oinfo[idx];
- CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: ostid: "DOSTID
- " idx: %d gen: %d\n",
- PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
- PFID(&hdr->coh_lu.loh_fid), hdr, POSTID(&oinfo->loi_oi),
+ CDEBUG(D_INODE, DFID"@%p[%d:%d] -> "DFID"@%p: ostid: "DOSTID
+ " ost idx: %d gen: %d\n",
+ PFID(lu_object_fid(&subobj->co_lu)), subhdr, entry, stripe,
+ PFID(lu_object_fid(lov2lu(lov))), hdr, POSTID(&oinfo->loi_oi),
oinfo->loi_ost_idx, oinfo->loi_ost_gen);
/* reuse ->coh_attr_guard to protect coh_parent change */
spin_lock(&subhdr->coh_attr_guard);
parent = subhdr->coh_parent;
if (parent == NULL) {
+ struct lovsub_object *lso = cl2lovsub(subobj);
+
subhdr->coh_parent = hdr;
spin_unlock(&subhdr->coh_attr_guard);
subhdr->coh_nesting = hdr->coh_nesting + 1;
- lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
- r0->lo_sub[idx] = cl2lovsub(stripe);
- r0->lo_sub[idx]->lso_super = lov;
- r0->lo_sub[idx]->lso_index = idx;
+ lu_object_ref_add(&subobj->co_lu, "lov-parent", lov);
+ lso->lso_super = lov;
+ lso->lso_index = idx;
result = 0;
} else {
struct lu_object *old_obj;
if (old_lov->lo_layout_invalid) {
/* the object's layout has already changed but isn't
* refreshed */
- lu_object_unhash(env, &stripe->co_lu);
+ lu_object_unhash(env, &subobj->co_lu);
result = -EAGAIN;
} else {
mask = D_ERROR;
result = -EIO;
}
- LU_OBJECT_DEBUG(mask, env, &stripe->co_lu,
- "stripe %d is already owned.\n", idx);
- LU_OBJECT_DEBUG(mask, env, old_obj, "owned.\n");
+ LU_OBJECT_DEBUG(mask, env, &subobj->co_lu,
+ "stripe %d is already owned.", idx);
+ LU_OBJECT_DEBUG(mask, env, old_obj, "owned.");
LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
- cl_object_put(env, stripe);
+ cl_object_put(env, subobj);
}
return result;
}
-static int lov_page_slice_fixup(struct lov_object *lov,
- struct cl_object *stripe)
+static int lov_init_raid0(const struct lu_env *env, struct lov_device *dev,
+ struct lov_object *lov, unsigned int index,
+ const struct cl_object_conf *conf,
+ struct lov_layout_entry *lle)
{
- struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
- struct cl_object *o;
-
- if (stripe == NULL)
- return hdr->coh_page_bufsize - lov->lo_cl.co_slice_off -
- cfs_size_round(sizeof(struct lov_page));
+ struct lov_layout_raid0 *r0 = &lle->lle_raid0;
+ struct lov_thread_info *lti = lov_env_info(env);
+ struct cl_object_conf *subconf = <i->lti_stripe_conf;
+ struct lu_fid *ofid = <i->lti_fid;
+ struct cl_object *stripe;
+ struct lov_stripe_md_entry *lse = lov_lse(lov, index);
+ int result;
+ int psz, sz;
+ int i;
- cl_object_for_each(o, stripe)
- o->co_slice_off += hdr->coh_page_bufsize;
+ ENTRY;
- return cl_object_header(stripe)->coh_page_bufsize;
-}
+ spin_lock_init(&r0->lo_sub_lock);
+ r0->lo_nr = lse->lsme_stripe_count;
-static int lov_init_raid0(const struct lu_env *env,
- struct lov_device *dev, struct lov_object *lov,
- const struct cl_object_conf *conf,
- union lov_layout_state *state)
-{
- int result;
- int i;
+ OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof(r0->lo_sub[0]));
+ if (r0->lo_sub == NULL)
+ GOTO(out, result = -ENOMEM);
- struct cl_object *stripe;
- struct lov_thread_info *lti = lov_env_info(env);
- struct cl_object_conf *subconf = <i->lti_stripe_conf;
- struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
- struct lu_fid *ofid = <i->lti_fid;
- struct lov_layout_raid0 *r0 = &state->raid0;
+ psz = 0;
+ result = 0;
+ memset(subconf, 0, sizeof(*subconf));
- ENTRY;
+ /*
+ * Create stripe cl_objects.
+ */
+ for (i = 0; i < r0->lo_nr; ++i) {
+ struct cl_device *subdev;
+ struct lov_oinfo *oinfo = lse->lsme_oinfo[i];
+ int ost_idx = oinfo->loi_ost_idx;
- 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);
- }
+ if (lov_oinfo_is_dummy(oinfo))
+ continue;
- 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));
+ result = ostid_to_fid(ofid, &oinfo->loi_oi, oinfo->loi_ost_idx);
+ if (result != 0)
+ GOTO(out, result);
- lov->lo_layout_invalid = true;
-
- OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
- if (r0->lo_sub != NULL) {
- int psz = 0;
+ if (dev->ld_target[ost_idx] == NULL) {
+ CERROR("%s: OST %04x is not initialized\n",
+ lov2obd(dev->ld_lov)->obd_name, ost_idx);
+ GOTO(out, result = -EIO);
+ }
- result = 0;
- subconf->coc_inode = conf->coc_inode;
- spin_lock_init(&r0->lo_sub_lock);
- /*
- * Create stripe cl_objects.
- */
- for (i = 0; i < r0->lo_nr && result == 0; ++i) {
- struct cl_device *subdev;
- struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
- int ost_idx = oinfo->loi_ost_idx;
-
- if (lov_oinfo_is_dummy(oinfo))
- continue;
+ 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))
+ GOTO(out, result = PTR_ERR(stripe));
+
+ result = lov_init_sub(env, lov, stripe, oinfo,
+ lov_comp_index(index, i));
+ if (result == -EAGAIN) { /* try again */
+ --i;
+ result = 0;
+ continue;
+ }
- result = ostid_to_fid(ofid, &oinfo->loi_oi,
- oinfo->loi_ost_idx);
- if (result != 0)
- GOTO(out, result);
-
- 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);
- if (result == -EAGAIN) { /* try again */
- --i;
- result = 0;
- continue;
- }
- } else {
- result = PTR_ERR(stripe);
- }
+ if (result == 0) {
+ r0->lo_sub[i] = cl2lovsub(stripe);
- if (result == 0) {
- int sz = lov_page_slice_fixup(lov, stripe);
- LASSERT(ergo(psz > 0, psz == sz));
- psz = sz;
- }
- }
- if (result == 0)
- cl_object_header(&lov->lo_cl)->coh_page_bufsize += psz;
- } else
- result = -ENOMEM;
+ sz = lov_page_slice_fixup(lov, stripe);
+ LASSERT(ergo(psz > 0, psz == sz));
+ psz = sz;
+ }
+ }
+ if (result == 0)
+ result = psz;
out:
RETURN(result);
}
-static int lov_init_released(const struct lu_env *env,
- struct lov_device *dev, struct lov_object *lov,
- const struct cl_object_conf *conf,
- union lov_layout_state *state)
-{
- struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
-
- LASSERT(lsm != NULL);
- LASSERT(lsm_is_released(lsm));
- LASSERT(lov->lo_lsm == NULL);
-
- lov->lo_lsm = lsm_addref(lsm);
- return 0;
-}
-
-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 || lov->lo_type == LLT_RELEASED);
-
- lov_layout_wait(env, lov);
- return 0;
-}
-
static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
+ struct lov_layout_raid0 *r0,
struct lovsub_object *los, int idx)
{
struct cl_object *sub;
- struct lov_layout_raid0 *r0;
struct lu_site *site;
- struct lu_site_bkt_data *bkt;
- wait_queue_t *waiter;
+ wait_queue_head_t *wq;
+ wait_queue_entry_t *waiter;
- r0 = &lov->u.raid0;
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);
+ sub = lovsub2cl(los);
+ site = sub->co_lu.lo_dev->ld_site;
+ wq = lu_site_wq_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);
cl_object_put(env, sub);
- /* ... wait until it is actually destroyed---sub-object clears its
- * ->lo_sub[] slot in lovsub_object_fini() */
+ /* ... wait until it is actually destroyed---sub-object clears its
+ * ->lo_sub[] slot in lovsub_object_free() */
if (r0->lo_sub[idx] == los) {
waiter = &lov_env_info(env)->lti_waiter;
- init_waitqueue_entry_current(waiter);
- add_wait_queue(&bkt->lsb_marche_funebre, waiter);
+ init_waitqueue_entry(waiter, current);
+ add_wait_queue(wq, waiter);
set_current_state(TASK_UNINTERRUPTIBLE);
while (1) {
/* this wait-queue is signaled at the end of
spin_lock(&r0->lo_sub_lock);
if (r0->lo_sub[idx] == los) {
spin_unlock(&r0->lo_sub_lock);
- waitq_wait(waiter, TASK_UNINTERRUPTIBLE);
+ schedule();
} else {
spin_unlock(&r0->lo_sub_lock);
set_current_state(TASK_RUNNING);
break;
}
}
- remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
+ remove_wait_queue(wq, waiter);
}
LASSERT(r0->lo_sub[idx] == NULL);
}
-static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
+static void lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
+ struct lov_layout_entry *lle)
+{
+ struct lov_layout_raid0 *r0 = &lle->lle_raid0;
+
+ ENTRY;
+
+ if (r0->lo_sub != NULL) {
+ int i;
+
+ for (i = 0; i < r0->lo_nr; ++i) {
+ struct lovsub_object *los = r0->lo_sub[i];
+
+ if (los != NULL) {
+ cl_object_prune(env, &los->lso_cl);
+ /*
+ * If top-level object is to be evicted from
+ * the cache, so are its sub-objects.
+ */
+ lov_subobject_kill(env, lov, r0, los, i);
+ }
+ }
+ }
+
+ EXIT;
+}
+
+static void lov_fini_raid0(const struct lu_env *env,
+ struct lov_layout_entry *lle)
+{
+ struct lov_layout_raid0 *r0 = &lle->lle_raid0;
+
+ if (r0->lo_sub != NULL) {
+ OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
+ r0->lo_sub = NULL;
+ }
+}
+
+static int lov_print_raid0(const struct lu_env *env, void *cookie,
+ lu_printer_t p, const struct lov_layout_entry *lle)
+{
+ const struct lov_layout_raid0 *r0 = &lle->lle_raid0;
+ int i;
+
+ for (i = 0; i < r0->lo_nr; ++i) {
+ struct lu_object *sub;
+
+ if (r0->lo_sub[i] != NULL) {
+ sub = lovsub2lu(r0->lo_sub[i]);
+ lu_object_print(env, cookie, p, sub);
+ } else {
+ (*p)(env, cookie, "sub %d absent\n", i);
+ }
+ }
+ return 0;
+}
+
+static int lov_attr_get_raid0(const struct lu_env *env, struct lov_object *lov,
+ unsigned int index, struct lov_layout_entry *lle,
+ struct cl_attr **lov_attr)
+{
+ struct lov_layout_raid0 *r0 = &lle->lle_raid0;
+ struct lov_stripe_md *lsm = lov->lo_lsm;
+ struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
+ struct cl_attr *attr = &r0->lo_attr;
+ __u64 kms = 0;
+ int result = 0;
+
+ if (r0->lo_attr_valid) {
+ *lov_attr = attr;
+ return 0;
+ }
+
+ memset(lvb, 0, sizeof(*lvb));
+
+ /* XXX: timestamps can be negative by sanity:test_39m,
+ * how can it be? */
+ lvb->lvb_atime = LLONG_MIN;
+ lvb->lvb_ctime = LLONG_MIN;
+ lvb->lvb_mtime = LLONG_MIN;
+
+ /*
+ * XXX that should be replaced with a loop over sub-objects,
+ * doing cl_object_attr_get() on them. But for now, let's
+ * reuse old lov code.
+ */
+
+ /*
+ * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
+ * happy. It's not needed, because new code uses
+ * ->coh_attr_guard spin-lock to protect consistency of
+ * sub-object attributes.
+ */
+ lov_stripe_lock(lsm);
+ result = lov_merge_lvb_kms(lsm, index, lvb, &kms);
+ lov_stripe_unlock(lsm);
+ if (result == 0) {
+ cl_lvb2attr(attr, lvb);
+ attr->cat_kms = kms;
+ r0->lo_attr_valid = 1;
+ *lov_attr = attr;
+ }
+
+ return result;
+}
+
+static struct lov_comp_layout_entry_ops raid0_ops = {
+ .lco_init = lov_init_raid0,
+ .lco_fini = lov_fini_raid0,
+ .lco_getattr = lov_attr_get_raid0,
+};
+
+static int lov_attr_get_dom(const struct lu_env *env, struct lov_object *lov,
+ unsigned int index, struct lov_layout_entry *lle,
+ struct cl_attr **lov_attr)
+{
+ struct lov_layout_dom *dom = &lle->lle_dom;
+ struct lov_oinfo *loi = dom->lo_loi;
+ struct cl_attr *attr = &dom->lo_dom_r0.lo_attr;
+
+ if (dom->lo_dom_r0.lo_attr_valid) {
+ *lov_attr = attr;
+ return 0;
+ }
+
+ if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks))
+ return OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
+
+ cl_lvb2attr(attr, &loi->loi_lvb);
+
+ /* DoM component size can be bigger than stripe size after
+ * client's setattr RPC, so do not count anything beyond
+ * component end. Alternatively, check that limit on server
+ * and do not allow size overflow there. */
+ if (attr->cat_size > lle->lle_extent->e_end)
+ attr->cat_size = lle->lle_extent->e_end;
+
+ attr->cat_kms = attr->cat_size;
+
+ dom->lo_dom_r0.lo_attr_valid = 1;
+ *lov_attr = attr;
+
+ return 0;
+}
+
+/**
+ * Lookup FLD to get MDS index of the given DOM object FID.
+ *
+ * \param[in] ld LOV device
+ * \param[in] fid FID to lookup
+ * \param[out] nr index in MDC array to return back
+ *
+ * \retval 0 and \a mds filled with MDS index if successful
+ * \retval negative value on error
+ */
+static int lov_fld_lookup(struct lov_device *ld, const struct lu_fid *fid,
+ __u32 *nr)
+{
+ __u32 mds_idx;
+ int i, rc;
+
+ ENTRY;
+
+ rc = fld_client_lookup(&ld->ld_lmv->u.lmv.lmv_fld, fid_seq(fid),
+ &mds_idx, LU_SEQ_RANGE_MDT, NULL);
+ if (rc) {
+ CERROR("%s: error while looking for mds number. Seq %#llx"
+ ", err = %d\n", lu_dev_name(cl2lu_dev(&ld->ld_cl)),
+ fid_seq(fid), rc);
+ RETURN(rc);
+ }
+
+ CDEBUG(D_INODE, "FLD lookup got mds #%x for fid="DFID"\n",
+ mds_idx, PFID(fid));
+
+ /* find proper MDC device in the array */
+ for (i = 0; i < ld->ld_md_tgts_nr; i++) {
+ if (ld->ld_md_tgts[i].ldm_mdc != NULL &&
+ ld->ld_md_tgts[i].ldm_idx == mds_idx)
+ break;
+ }
+
+ if (i == ld->ld_md_tgts_nr) {
+ CERROR("%s: cannot find corresponding MDC device for mds #%x "
+ "for fid="DFID"\n", lu_dev_name(cl2lu_dev(&ld->ld_cl)),
+ mds_idx, PFID(fid));
+ rc = -EINVAL;
+ } else {
+ *nr = i;
+ }
+ RETURN(rc);
+}
+
+/**
+ * Implementation of lov_comp_layout_entry_ops::lco_init for DOM object.
+ *
+ * Init the DOM object for the first time. It prepares also RAID0 entry
+ * for it to use in common methods with ordinary RAID0 layout entries.
+ *
+ * \param[in] env execution environment
+ * \param[in] dev LOV device
+ * \param[in] lov LOV object
+ * \param[in] index Composite layout entry index in LSM
+ * \param[in] lle Composite LOV layout entry
+ */
+static int lov_init_dom(const struct lu_env *env, struct lov_device *dev,
+ struct lov_object *lov, unsigned int index,
+ const struct cl_object_conf *conf,
+ struct lov_layout_entry *lle)
+{
+ struct lov_thread_info *lti = lov_env_info(env);
+ struct lov_stripe_md_entry *lsme = lov_lse(lov, index);
+ struct cl_object *clo;
+ struct lu_object *o = lov2lu(lov);
+ const struct lu_fid *fid = lu_object_fid(o);
+ struct cl_device *mdcdev;
+ struct lov_oinfo *loi = NULL;
+ struct cl_object_conf *sconf = <i->lti_stripe_conf;
+
+ int rc;
+ __u32 idx = 0;
+
+ ENTRY;
+
+ LASSERT(index == 0);
+
+ /* find proper MDS device */
+ rc = lov_fld_lookup(dev, fid, &idx);
+ if (rc)
+ RETURN(rc);
+
+ LASSERTF(dev->ld_md_tgts[idx].ldm_mdc != NULL,
+ "LOV md target[%u] is NULL\n", idx);
+
+ /* check lsm is DOM, more checks are needed */
+ LASSERT(lsme->lsme_stripe_count == 0);
+
+ /*
+ * Create lower cl_objects.
+ */
+ mdcdev = dev->ld_md_tgts[idx].ldm_mdc;
+
+ LASSERTF(mdcdev != NULL, "non-initialized mdc subdev\n");
+
+ /* DoM object has no oinfo in LSM entry, create it exclusively */
+ OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
+ if (loi == NULL)
+ RETURN(-ENOMEM);
+
+ fid_to_ostid(lu_object_fid(lov2lu(lov)), &loi->loi_oi);
+
+ sconf->u.coc_oinfo = loi;
+again:
+ clo = lov_sub_find(env, mdcdev, fid, sconf);
+ if (IS_ERR(clo))
+ GOTO(out, rc = PTR_ERR(clo));
+
+ rc = lov_init_sub(env, lov, clo, loi, lov_comp_index(index, 0));
+ if (rc == -EAGAIN) /* try again */
+ goto again;
+ else if (rc != 0)
+ GOTO(out, rc);
+
+ lle->lle_dom.lo_dom = cl2lovsub(clo);
+ spin_lock_init(&lle->lle_dom.lo_dom_r0.lo_sub_lock);
+ lle->lle_dom.lo_dom_r0.lo_nr = 1;
+ lle->lle_dom.lo_dom_r0.lo_sub = &lle->lle_dom.lo_dom;
+ lle->lle_dom.lo_loi = loi;
+
+ rc = lov_page_slice_fixup(lov, clo);
+ RETURN(rc);
+
+out:
+ if (loi != NULL)
+ OBD_SLAB_FREE_PTR(loi, lov_oinfo_slab);
+ return rc;
+}
+
+/**
+ * Implementation of lov_layout_operations::llo_fini for DOM object.
+ *
+ * Finish the DOM object and free related memory.
+ *
+ * \param[in] env execution environment
+ * \param[in] lov LOV object
+ * \param[in] state LOV layout state
+ */
+static void lov_fini_dom(const struct lu_env *env,
+ struct lov_layout_entry *lle)
+{
+ if (lle->lle_dom.lo_dom != NULL)
+ lle->lle_dom.lo_dom = NULL;
+ if (lle->lle_dom.lo_loi != NULL)
+ OBD_SLAB_FREE_PTR(lle->lle_dom.lo_loi, lov_oinfo_slab);
+}
+
+static struct lov_comp_layout_entry_ops dom_ops = {
+ .lco_init = lov_init_dom,
+ .lco_fini = lov_fini_dom,
+ .lco_getattr = lov_attr_get_dom,
+};
+
+static int lov_init_composite(const struct lu_env *env, struct lov_device *dev,
+ struct lov_object *lov, struct lov_stripe_md *lsm,
+ const struct cl_object_conf *conf,
+ union lov_layout_state *state)
+{
+ struct lov_layout_composite *comp = &state->composite;
+ struct lov_layout_entry *lle;
+ struct lov_mirror_entry *lre;
+ unsigned int entry_count;
+ unsigned int psz = 0;
+ unsigned int mirror_count;
+ int flr_state = lsm->lsm_flags & LCM_FL_FLR_MASK;
+ int result = 0;
+ unsigned int seq;
+ int i, j;
+
+ ENTRY;
+
+ LASSERT(lsm->lsm_entry_count > 0);
+ LASSERT(lov->lo_lsm == NULL);
+ lov->lo_lsm = lsm_addref(lsm);
+ lov->lo_layout_invalid = true;
+
+ dump_lsm(D_INODE, lsm);
+
+ entry_count = lsm->lsm_entry_count;
+
+ spin_lock_init(&comp->lo_write_lock);
+ comp->lo_flags = lsm->lsm_flags;
+ comp->lo_mirror_count = lsm->lsm_mirror_count + 1;
+ comp->lo_entry_count = lsm->lsm_entry_count;
+ comp->lo_preferred_mirror = -1;
+
+ if (equi(flr_state == LCM_FL_NONE, comp->lo_mirror_count > 1))
+ RETURN(-EINVAL);
+
+ OBD_ALLOC(comp->lo_mirrors,
+ comp->lo_mirror_count * sizeof(*comp->lo_mirrors));
+ if (comp->lo_mirrors == NULL)
+ RETURN(-ENOMEM);
+
+ OBD_ALLOC(comp->lo_entries, entry_count * sizeof(*comp->lo_entries));
+ if (comp->lo_entries == NULL)
+ RETURN(-ENOMEM);
+
+ /* Initiate all entry types and extents data at first */
+ for (i = 0, j = 0, mirror_count = 1; i < entry_count; i++) {
+ int mirror_id = 0;
+
+ lle = &comp->lo_entries[i];
+
+ lle->lle_lsme = lsm->lsm_entries[i];
+ lle->lle_type = lov_entry_type(lle->lle_lsme);
+ switch (lle->lle_type) {
+ case LOV_PATTERN_RAID0:
+ lle->lle_comp_ops = &raid0_ops;
+ break;
+ case LOV_PATTERN_MDT:
+ lle->lle_comp_ops = &dom_ops;
+ break;
+ default:
+ CERROR("%s: unknown composite layout entry type %i\n",
+ lov2obd(dev->ld_lov)->obd_name,
+ lsm->lsm_entries[i]->lsme_pattern);
+ dump_lsm(D_ERROR, lsm);
+ RETURN(-EIO);
+ }
+
+ lle->lle_extent = &lle->lle_lsme->lsme_extent;
+ lle->lle_valid = !(lle->lle_lsme->lsme_flags & LCME_FL_STALE);
+
+ if (flr_state != LCM_FL_NONE)
+ mirror_id = mirror_id_of(lle->lle_lsme->lsme_id);
+
+ lre = &comp->lo_mirrors[j];
+ if (i > 0) {
+ if (mirror_id == lre->lre_mirror_id) {
+ lre->lre_valid |= lle->lle_valid;
+ lre->lre_stale |= !lle->lle_valid;
+ lre->lre_end = i;
+ continue;
+ }
+
+ /* new mirror detected, assume that the mirrors
+ * are shorted in layout */
+ ++mirror_count;
+ ++j;
+ if (j >= comp->lo_mirror_count)
+ break;
+
+ lre = &comp->lo_mirrors[j];
+ }
+
+ /* entries must be sorted by mirrors */
+ lre->lre_mirror_id = mirror_id;
+ lre->lre_start = lre->lre_end = i;
+ lre->lre_preferred = !!(lle->lle_lsme->lsme_flags &
+ LCME_FL_PREF_RD);
+ lre->lre_valid = lle->lle_valid;
+ lre->lre_stale = !lle->lle_valid;
+ }
+
+ /* sanity check for FLR */
+ if (mirror_count != comp->lo_mirror_count) {
+ CDEBUG(D_INODE, DFID
+ " doesn't have the # of mirrors it claims, %u/%u\n",
+ PFID(lu_object_fid(lov2lu(lov))), mirror_count,
+ comp->lo_mirror_count + 1);
+
+ GOTO(out, result = -EINVAL);
+ }
+
+ lov_foreach_layout_entry(lov, lle) {
+ int index = lov_layout_entry_index(lov, lle);
+
+ /**
+ * If the component has not been init-ed on MDS side, for
+ * PFL layout, we'd know that the components beyond this one
+ * will be dynamically init-ed later on file write/trunc ops.
+ */
+ if (!lsme_inited(lle->lle_lsme))
+ continue;
+
+ result = lle->lle_comp_ops->lco_init(env, dev, lov, index,
+ conf, lle);
+ if (result < 0)
+ break;
+
+ LASSERT(ergo(psz > 0, psz == result));
+ psz = result;
+ }
+
+ if (psz > 0)
+ cl_object_header(&lov->lo_cl)->coh_page_bufsize += psz;
+
+ /* decide the preferred mirror. It uses the hash value of lov_object
+ * so that different clients would use different mirrors for read. */
+ mirror_count = 0;
+ seq = hash_long((unsigned long)lov, 8);
+ for (i = 0; i < comp->lo_mirror_count; i++) {
+ unsigned int idx = (i + seq) % comp->lo_mirror_count;
+
+ lre = lov_mirror_entry(lov, idx);
+ if (lre->lre_stale)
+ continue;
+
+ mirror_count++; /* valid mirror */
+
+ if (lre->lre_preferred || comp->lo_preferred_mirror < 0)
+ comp->lo_preferred_mirror = idx;
+ }
+ if (!mirror_count) {
+ CDEBUG(D_INODE, DFID
+ " doesn't have any valid mirrors\n",
+ PFID(lu_object_fid(lov2lu(lov))));
+
+ comp->lo_preferred_mirror = 0;
+ }
+
+ LASSERT(comp->lo_preferred_mirror >= 0);
+
+ EXIT;
+out:
+ return result > 0 ? 0 : result;
+}
+
+static int lov_init_empty(const struct lu_env *env, struct lov_device *dev,
+ struct lov_object *lov, struct lov_stripe_md *lsm,
+ const struct cl_object_conf *conf,
+ union lov_layout_state *state)
+{
+ return 0;
+}
+
+static int lov_init_released(const struct lu_env *env,
+ struct lov_device *dev, struct lov_object *lov,
+ struct lov_stripe_md *lsm,
+ const struct cl_object_conf *conf,
+ union lov_layout_state *state)
+{
+ LASSERT(lsm != NULL);
+ LASSERT(lsm->lsm_is_released);
+ LASSERT(lov->lo_lsm == NULL);
+
+ lov->lo_lsm = lsm_addref(lsm);
+ return 0;
+}
+
+static int lov_init_foreign(const struct lu_env *env,
+ struct lov_device *dev, struct lov_object *lov,
+ struct lov_stripe_md *lsm,
+ const struct cl_object_conf *conf,
union lov_layout_state *state)
{
- struct lov_layout_raid0 *r0 = &state->raid0;
- struct lov_stripe_md *lsm = lov->lo_lsm;
- int i;
+ LASSERT(lsm != NULL);
+ LASSERT(lov->lo_type == LLT_FOREIGN);
+ LASSERT(lov->lo_lsm == NULL);
+
+ lov->lo_lsm = lsm_addref(lsm);
+ return 0;
+}
+
+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 || lov->lo_type == LLT_RELEASED ||
+ lov->lo_type == LLT_FOREIGN);
+
+ lov_layout_wait(env, lov);
+ return 0;
+}
+
+static int lov_delete_composite(const struct lu_env *env,
+ struct lov_object *lov,
+ union lov_layout_state *state)
+{
+ struct lov_layout_entry *entry;
+ struct lov_layout_composite *comp = &state->composite;
ENTRY;
- dump_lsm(D_INODE, lsm);
+ dump_lsm(D_INODE, lov->lo_lsm);
lov_layout_wait(env, lov);
- if (r0->lo_sub != NULL) {
- for (i = 0; i < r0->lo_nr; ++i) {
- struct lovsub_object *los = r0->lo_sub[i];
+ if (comp->lo_entries)
+ lov_foreach_layout_entry(lov, entry)
+ lov_delete_raid0(env, lov, entry);
- if (los != NULL) {
- cl_object_prune(env, &los->lso_cl);
- /*
- * 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);
}
LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
}
-static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
- union lov_layout_state *state)
+static void lov_fini_composite(const struct lu_env *env,
+ struct lov_object *lov,
+ union lov_layout_state *state)
{
- struct lov_layout_raid0 *r0 = &state->raid0;
+ struct lov_layout_composite *comp = &state->composite;
ENTRY;
- if (r0->lo_sub != NULL) {
- OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
- r0->lo_sub = NULL;
+ if (comp->lo_entries != NULL) {
+ struct lov_layout_entry *entry;
+
+ lov_foreach_layout_entry(lov, entry)
+ entry->lle_comp_ops->lco_fini(env, entry);
+
+ OBD_FREE(comp->lo_entries,
+ comp->lo_entry_count * sizeof(*comp->lo_entries));
+ comp->lo_entries = NULL;
+ }
+
+ if (comp->lo_mirrors != NULL) {
+ OBD_FREE(comp->lo_mirrors,
+ comp->lo_mirror_count * sizeof(*comp->lo_mirrors));
+ comp->lo_mirrors = NULL;
}
+ memset(comp, 0, sizeof(*comp));
+
dump_lsm(D_INODE, lov->lo_lsm);
lov_free_memmd(&lov->lo_lsm);
return 0;
}
-static int lov_print_raid0(const struct lu_env *env, void *cookie,
- lu_printer_t p, const struct lu_object *o)
+static int lov_print_composite(const struct lu_env *env, void *cookie,
+ lu_printer_t p, const struct lu_object *o)
+{
+ struct lov_object *lov = lu2lov(o);
+ struct lov_stripe_md *lsm = lov->lo_lsm;
+ int i;
+
+ (*p)(env, cookie, "entries: %d, %s, lsm{%p 0x%08X %d %u}:\n",
+ lsm->lsm_entry_count,
+ lov->lo_layout_invalid ? "invalid" : "valid", lsm,
+ lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
+ lsm->lsm_layout_gen);
+
+ for (i = 0; i < lsm->lsm_entry_count; i++) {
+ struct lov_stripe_md_entry *lse = lsm->lsm_entries[i];
+ struct lov_layout_entry *lle = lov_entry(lov, i);
+
+ (*p)(env, cookie,
+ DEXT ": { 0x%08X, %u, %#x, %u, %#x, %u, %u }\n",
+ PEXT(&lse->lsme_extent), lse->lsme_magic,
+ lse->lsme_id, lse->lsme_pattern, lse->lsme_layout_gen,
+ lse->lsme_flags, lse->lsme_stripe_count,
+ lse->lsme_stripe_size);
+ lov_print_raid0(env, cookie, p, lle);
+ }
+
+ return 0;
+}
+
+static int lov_print_released(const struct lu_env *env, void *cookie,
+ lu_printer_t p, const struct lu_object *o)
{
struct lov_object *lov = lu2lov(o);
- struct lov_layout_raid0 *r0 = lov_r0(lov);
struct lov_stripe_md *lsm = lov->lo_lsm;
- int i;
- (*p)(env, cookie, "stripes: %d, %s, lsm{%p 0x%08X %d %u %u}:\n",
- r0->lo_nr, lov->lo_layout_invalid ? "invalid" : "valid", lsm,
+ (*p)(env, cookie,
+ "released: %s, lsm{%p 0x%08X %d %u}:\n",
+ lov->lo_layout_invalid ? "invalid" : "valid", lsm,
lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
- lsm->lsm_stripe_count, lsm->lsm_layout_gen);
- for (i = 0; i < r0->lo_nr; ++i) {
- struct lu_object *sub;
-
- if (r0->lo_sub[i] != NULL) {
- sub = lovsub2lu(r0->lo_sub[i]);
- lu_object_print(env, cookie, p, sub);
- } else {
- (*p)(env, cookie, "sub %d absent\n", i);
- }
- }
+ lsm->lsm_layout_gen);
return 0;
}
-static int lov_print_released(const struct lu_env *env, void *cookie,
+static int lov_print_foreign(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *o)
{
struct lov_object *lov = lu2lov(o);
struct lov_stripe_md *lsm = lov->lo_lsm;
(*p)(env, cookie,
- "released: %s, lsm{%p 0x%08X %d %u %u}:\n",
+ "foreign: %s, lsm{%p 0x%08X %d %u}:\n",
lov->lo_layout_invalid ? "invalid" : "valid", lsm,
lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
- lsm->lsm_stripe_count, lsm->lsm_layout_gen);
+ lsm->lsm_layout_gen);
+ (*p)(env, cookie,
+ "raw_ea_content '%.*s'\n",
+ (int)lsm->lsm_foreign_size, (char *)lsm_foreign(lsm));
return 0;
}
return 0;
}
-static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
- struct cl_attr *attr)
+static int lov_attr_get_composite(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 cl_attr *lov_attr = &r0->lo_attr;
+ struct lov_layout_entry *entry;
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(atomic_read(&lsm->lsm_refc) > 1); */
-
- if (!r0->lo_attr_valid) {
- struct lov_stripe_md *lsm = lov->lo_lsm;
- struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
- __u64 kms = 0;
-
- memset(lvb, 0, sizeof(*lvb));
- /* XXX: timestamps can be negative by sanity:test_39m,
- * how can it be? */
- lvb->lvb_atime = LLONG_MIN;
- lvb->lvb_ctime = LLONG_MIN;
- lvb->lvb_mtime = LLONG_MIN;
-
- /*
- * XXX that should be replaced with a loop over sub-objects,
- * doing cl_object_attr_get() on them. But for now, let's
- * reuse old lov code.
- */
+ ENTRY;
- /*
- * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
- * happy. It's not needed, because new code uses
- * ->coh_attr_guard spin-lock to protect consistency of
- * sub-object attributes.
- */
- lov_stripe_lock(lsm);
- result = lov_merge_lvb_kms(lsm, lvb, &kms);
- lov_stripe_unlock(lsm);
- if (result == 0) {
- cl_lvb2attr(lov_attr, lvb);
- lov_attr->cat_kms = kms;
- r0->lo_attr_valid = 1;
- }
- }
- if (result == 0) { /* merge results */
- attr->cat_blocks = lov_attr->cat_blocks;
- attr->cat_size = lov_attr->cat_size;
- attr->cat_kms = lov_attr->cat_kms;
+ attr->cat_size = 0;
+ attr->cat_blocks = 0;
+ lov_foreach_layout_entry(lov, entry) {
+ struct cl_attr *lov_attr = NULL;
+ int index = lov_layout_entry_index(lov, entry);
+
+ if (!entry->lle_valid)
+ continue;
+
+ /* PFL: This component has not been init-ed. */
+ if (!lsm_entry_inited(lov->lo_lsm, index))
+ continue;
+
+ result = entry->lle_comp_ops->lco_getattr(env, lov, index,
+ entry, &lov_attr);
+ if (result < 0)
+ RETURN(result);
+
+ if (lov_attr == NULL)
+ continue;
+
+ CDEBUG(D_INODE, "COMP ID #%i: s=%llu m=%llu a=%llu c=%llu "
+ "b=%llu\n", index - 1, lov_attr->cat_size,
+ lov_attr->cat_mtime, lov_attr->cat_atime,
+ lov_attr->cat_ctime, lov_attr->cat_blocks);
+
+ /* merge results */
+ attr->cat_blocks += lov_attr->cat_blocks;
+ if (attr->cat_size < lov_attr->cat_size)
+ attr->cat_size = lov_attr->cat_size;
+ if (attr->cat_kms < lov_attr->cat_kms)
+ attr->cat_kms = lov_attr->cat_kms;
if (attr->cat_atime < lov_attr->cat_atime)
attr->cat_atime = lov_attr->cat_atime;
if (attr->cat_ctime < lov_attr->cat_ctime)
if (attr->cat_mtime < lov_attr->cat_mtime)
attr->cat_mtime = lov_attr->cat_mtime;
}
- RETURN(result);
+
+ RETURN(0);
+}
+
+static int lov_flush_composite(const struct lu_env *env,
+ struct cl_object *obj,
+ struct ldlm_lock *lock)
+{
+ struct lov_object *lov = cl2lov(obj);
+ struct lovsub_object *lovsub;
+
+ ENTRY;
+
+ if (!lsme_is_dom(lov->lo_lsm->lsm_entries[0]))
+ RETURN(-EINVAL);
+
+ lovsub = lov->u.composite.lo_entries[0].lle_dom.lo_dom;
+ RETURN(cl_object_flush(env, lovsub2cl(lovsub), lock));
}
const static struct lov_layout_operations lov_dispatch[] = {
- [LLT_EMPTY] = {
- .llo_init = lov_init_empty,
- .llo_delete = lov_delete_empty,
- .llo_fini = lov_fini_empty,
- .llo_install = lov_install_empty,
- .llo_print = lov_print_empty,
- .llo_page_init = lov_page_init_empty,
- .llo_lock_init = lov_lock_init_empty,
- .llo_io_init = lov_io_init_empty,
- .llo_getattr = lov_attr_get_empty
- },
- [LLT_RAID0] = {
- .llo_init = lov_init_raid0,
- .llo_delete = lov_delete_raid0,
- .llo_fini = lov_fini_raid0,
- .llo_install = lov_install_raid0,
- .llo_print = lov_print_raid0,
- .llo_page_init = lov_page_init_raid0,
- .llo_lock_init = lov_lock_init_raid0,
- .llo_io_init = lov_io_init_raid0,
- .llo_getattr = lov_attr_get_raid0
+ [LLT_EMPTY] = {
+ .llo_init = lov_init_empty,
+ .llo_delete = lov_delete_empty,
+ .llo_fini = lov_fini_empty,
+ .llo_print = lov_print_empty,
+ .llo_page_init = lov_page_init_empty,
+ .llo_lock_init = lov_lock_init_empty,
+ .llo_io_init = lov_io_init_empty,
+ .llo_getattr = lov_attr_get_empty,
+ },
+ [LLT_RELEASED] = {
+ .llo_init = lov_init_released,
+ .llo_delete = lov_delete_empty,
+ .llo_fini = lov_fini_released,
+ .llo_print = lov_print_released,
+ .llo_page_init = lov_page_init_empty,
+ .llo_lock_init = lov_lock_init_empty,
+ .llo_io_init = lov_io_init_released,
+ .llo_getattr = lov_attr_get_empty,
+ },
+ [LLT_COMP] = {
+ .llo_init = lov_init_composite,
+ .llo_delete = lov_delete_composite,
+ .llo_fini = lov_fini_composite,
+ .llo_print = lov_print_composite,
+ .llo_page_init = lov_page_init_composite,
+ .llo_lock_init = lov_lock_init_composite,
+ .llo_io_init = lov_io_init_composite,
+ .llo_getattr = lov_attr_get_composite,
+ .llo_flush = lov_flush_composite,
+ },
+ [LLT_FOREIGN] = {
+ .llo_init = lov_init_foreign,
+ .llo_delete = lov_delete_empty,
+ .llo_fini = lov_fini_released,
+ .llo_print = lov_print_foreign,
+ .llo_page_init = lov_page_init_foreign,
+ .llo_lock_init = lov_lock_init_empty,
+ .llo_io_init = lov_io_init_empty,
+ .llo_getattr = lov_attr_get_empty,
},
- [LLT_RELEASED] = {
- .llo_init = lov_init_released,
- .llo_delete = lov_delete_empty,
- .llo_fini = lov_fini_released,
- .llo_install = lov_install_empty,
- .llo_print = lov_print_released,
- .llo_page_init = lov_page_init_empty,
- .llo_lock_init = lov_lock_init_empty,
- .llo_io_init = lov_io_init_released,
- .llo_getattr = lov_attr_get_empty
- }
};
/**
* Performs a double-dispatch based on the layout type of an object.
*/
-#define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
-({ \
- struct lov_object *__obj = (obj); \
- enum lov_layout_type __llt; \
- \
- __llt = __obj->lo_type; \
- LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
- lov_dispatch[__llt].op(__VA_ARGS__); \
+#define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
+({ \
+ struct lov_object *__obj = (obj); \
+ enum lov_layout_type __llt; \
+ \
+ __llt = __obj->lo_type; \
+ LASSERT(__llt < ARRAY_SIZE(lov_dispatch)); \
+ lov_dispatch[__llt].op(__VA_ARGS__); \
})
/**
{
if (lsm == NULL)
return LLT_EMPTY;
- if (lsm_is_released(lsm))
+
+ if (lsm->lsm_is_released)
return LLT_RELEASED;
- return LLT_RAID0;
+
+ if (lsm->lsm_magic == LOV_MAGIC_V1 ||
+ lsm->lsm_magic == LOV_MAGIC_V3 ||
+ lsm->lsm_magic == LOV_MAGIC_COMP_V1)
+ return LLT_COMP;
+
+ if (lsm->lsm_magic == LOV_MAGIC_FOREIGN)
+ return LLT_FOREIGN;
+
+ return LLT_EMPTY;
}
static inline void lov_conf_freeze(struct lov_object *lov)
{
+ CDEBUG(D_INODE, "To take share lov(%p) owner %p/%p\n",
+ lov, lov->lo_owner, current);
if (lov->lo_owner != current)
down_read(&lov->lo_type_guard);
}
static inline void lov_conf_thaw(struct lov_object *lov)
{
+ CDEBUG(D_INODE, "To release share lov(%p) owner %p/%p\n",
+ lov, lov->lo_owner, current);
if (lov->lo_owner != current)
up_read(&lov->lo_type_guard);
}
\
lov_conf_freeze(__obj); \
__llt = __obj->lo_type; \
- LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
+ LASSERT(__llt < ARRAY_SIZE(lov_dispatch)); \
lov_dispatch[__llt].op(__VA_ARGS__); \
lov_conf_thaw(__obj); \
} while (0)
down_write(&lov->lo_type_guard);
LASSERT(lov->lo_owner == NULL);
lov->lo_owner = current;
+ CDEBUG(D_INODE, "Took exclusive lov(%p) owner %p\n",
+ lov, lov->lo_owner);
}
static void lov_conf_unlock(struct lov_object *lov)
{
+ CDEBUG(D_INODE, "To release exclusive lov(%p) owner %p\n",
+ lov, lov->lo_owner);
lov->lo_owner = NULL;
up_write(&lov->lo_type_guard);
}
}
static int lov_layout_change(const struct lu_env *unused,
- struct lov_object *lov,
+ struct lov_object *lov, struct lov_stripe_md *lsm,
const struct cl_object_conf *conf)
{
- int result;
- enum lov_layout_type llt = LLT_EMPTY;
+ enum lov_layout_type llt = lov_type(lsm);
union lov_layout_state *state = &lov->u;
const struct lov_layout_operations *old_ops;
const struct lov_layout_operations *new_ops;
-
- void *cookie;
+ struct lov_device *lov_dev = lov_object_dev(lov);
struct lu_env *env;
- int refcheck;
+ __u16 refcheck;
+ int rc;
ENTRY;
- LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
+ LASSERT(lov->lo_type < ARRAY_SIZE(lov_dispatch));
- if (conf->u.coc_md != NULL)
- llt = lov_type(conf->u.coc_md->lsm);
- LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
-
- cookie = cl_env_reenter();
env = cl_env_get(&refcheck);
- if (IS_ERR(env)) {
- cl_env_reexit(cookie);
+ if (IS_ERR(env))
RETURN(PTR_ERR(env));
- }
+
+ LASSERT(llt < ARRAY_SIZE(lov_dispatch));
CDEBUG(D_INODE, DFID" from %s to %s\n",
PFID(lu_object_fid(lov2lu(lov))),
old_ops = &lov_dispatch[lov->lo_type];
new_ops = &lov_dispatch[llt];
- result = cl_object_prune(env, &lov->lo_cl);
- if (result != 0)
- GOTO(out, result);
+ rc = cl_object_prune(env, &lov->lo_cl);
+ if (rc != 0)
+ GOTO(out, rc);
- result = old_ops->llo_delete(env, lov, &lov->u);
- if (result == 0) {
- old_ops->llo_fini(env, lov, &lov->u);
+ rc = old_ops->llo_delete(env, lov, &lov->u);
+ if (rc != 0)
+ GOTO(out, rc);
- LASSERT(atomic_read(&lov->lo_active_ios) == 0);
+ old_ops->llo_fini(env, lov, &lov->u);
- lov->lo_type = LLT_EMPTY;
- /* page bufsize fixup */
- cl_object_header(&lov->lo_cl)->coh_page_bufsize -=
- lov_page_slice_fixup(lov, NULL);
+ LASSERT(atomic_read(&lov->lo_active_ios) == 0);
- 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. */
- }
+ CDEBUG(D_INODE, DFID "Apply new layout lov %p, type %d\n",
+ PFID(lu_object_fid(lov2lu(lov))), lov, llt);
+
+ /* page bufsize fixup */
+ cl_object_header(&lov->lo_cl)->coh_page_bufsize -=
+ lov_page_slice_fixup(lov, NULL);
+
+ lov->lo_type = llt;
+ rc = new_ops->llo_init(env, lov_dev, lov, lsm, conf, state);
+ if (rc != 0) {
+ struct obd_device *obd = lov2obd(lov_dev->ld_lov);
+
+ CERROR("%s: cannot apply new layout on "DFID" : rc = %d\n",
+ obd->obd_name, PFID(lu_object_fid(lov2lu(lov))), rc);
+ new_ops->llo_delete(env, lov, state);
+ new_ops->llo_fini(env, lov, state);
+ /* this file becomes an EMPTY file. */
+ lov->lo_type = LLT_EMPTY;
+ GOTO(out, rc);
}
out:
cl_env_put(env, &refcheck);
- cl_env_reexit(cookie);
- RETURN(result);
+ RETURN(rc);
}
/*****************************************************************************
*
*/
int lov_object_init(const struct lu_env *env, struct lu_object *obj,
- const struct lu_object_conf *conf)
+ const struct lu_object_conf *conf)
{
- 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->u;
- const struct lov_layout_operations *ops;
- int result;
+ struct lov_object *lov = lu2lov(obj);
+ struct lov_device *dev = lov_object_dev(lov);
+ const struct cl_object_conf *cconf = lu2cl_conf(conf);
+ union lov_layout_state *set = &lov->u;
+ const struct lov_layout_operations *ops;
+ struct lov_stripe_md *lsm = NULL;
+ int rc;
+ ENTRY;
- ENTRY;
init_rwsem(&lov->lo_type_guard);
atomic_set(&lov->lo_active_ios, 0);
init_waitqueue_head(&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 = lov_type(cconf->u.coc_md->lsm);
- ops = &lov_dispatch[lov->lo_type];
- result = ops->llo_init(env, dev, lov, cconf, set);
- if (result == 0)
- ops->llo_install(env, lov, set);
- RETURN(result);
+ lov->lo_type = LLT_EMPTY;
+ if (cconf->u.coc_layout.lb_buf != NULL) {
+ lsm = lov_unpackmd(dev->ld_lov,
+ cconf->u.coc_layout.lb_buf,
+ cconf->u.coc_layout.lb_len);
+ if (IS_ERR(lsm))
+ RETURN(PTR_ERR(lsm));
+
+ dump_lsm(D_INODE, lsm);
+ }
+
+ /* no locking is necessary, as object is being created */
+ lov->lo_type = lov_type(lsm);
+ ops = &lov_dispatch[lov->lo_type];
+ rc = ops->llo_init(env, dev, lov, lsm, cconf, set);
+ if (rc != 0)
+ GOTO(out_lsm, rc);
+
+out_lsm:
+ lov_lsm_put(lsm);
+
+ RETURN(rc);
}
static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
int result = 0;
ENTRY;
+ if (conf->coc_opc == OBJECT_CONF_SET &&
+ conf->u.coc_layout.lb_buf != NULL) {
+ lsm = lov_unpackmd(lov_object_dev(lov)->ld_lov,
+ conf->u.coc_layout.lb_buf,
+ conf->u.coc_layout.lb_len);
+ if (IS_ERR(lsm))
+ RETURN(PTR_ERR(lsm));
+ dump_lsm(D_INODE, lsm);
+ }
+
lov_conf_lock(lov);
if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
lov->lo_layout_invalid = true;
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) &&
- (lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
+ (lov->lo_lsm->lsm_entries[0]->lsme_pattern ==
+ lsm->lsm_entries[0]->lsme_pattern))) {
/* same version of layout */
lov->lo_layout_invalid = false;
GOTO(out, result = 0);
GOTO(out, result = -EBUSY);
}
- result = lov_layout_change(env, lov, conf);
+ result = lov_layout_change(env, lov, lsm, conf);
lov->lo_layout_invalid = result != 0;
EXIT;
out:
lov_conf_unlock(lov);
+ lov_lsm_put(lsm);
CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
RETURN(result);
int lov_io_init(const struct lu_env *env, struct cl_object *obj,
struct cl_io *io)
{
- CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
+ CL_IO_SLICE_CLEAN(lov_env_io(env), lis_preserved);
+
+ CDEBUG(D_INODE, DFID "io %p type %d ignore/verify layout %d/%d\n",
+ PFID(lu_object_fid(&obj->co_lu)), io, io->ci_type,
+ io->ci_ignore_layout, io->ci_verify_layout);
+
+ /* IO type CIT_MISC with ci_ignore_layout set are usually invoked from
+ * the OSC layer. It shouldn't take lov layout conf lock in that case,
+ * because as long as the OSC object exists, the layout can't be
+ * reconfigured. */
return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
- !io->ci_ignore_layout, env, obj, io);
+ !(io->ci_ignore_layout && io->ci_type == CIT_MISC),
+ env, obj, io);
}
/**
return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
}
-static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
- const struct cl_attr *attr, unsigned valid)
+static int lov_attr_update(const struct lu_env *env, struct cl_object *obj,
+ const struct cl_attr *attr, unsigned valid)
{
- /*
- * No dispatch is required here, as no layout implements this.
- */
- return 0;
+ /*
+ * No dispatch is required here, as no layout implements this.
+ */
+ return 0;
}
int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
io);
}
+/**
+ * We calculate on which OST the mapping will end. If the length of mapping
+ * is greater than (stripe_size * stripe_count) then the last_stripe will
+ * will be one just before start_stripe. Else we check if the mapping
+ * intersects each OST and find last_stripe.
+ * This function returns the last_stripe and also sets the stripe_count
+ * over which the mapping is spread
+ *
+ * \param lsm [in] striping information for the file
+ * \param index [in] stripe component index
+ * \param ext [in] logical extent of mapping
+ * \param start_stripe [in] starting stripe of the mapping
+ * \param stripe_count [out] the number of stripes across which to map is
+ * returned
+ *
+ * \retval last_stripe return the last stripe of the mapping
+ */
+static int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, int index,
+ struct lu_extent *ext,
+ int start_stripe, int *stripe_count)
+{
+ struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
+ int last_stripe;
+ u64 obd_start;
+ u64 obd_end;
+ int i, j;
+
+ if (ext->e_end - ext->e_start >
+ lsme->lsme_stripe_size * lsme->lsme_stripe_count) {
+ last_stripe = (start_stripe < 1 ? lsme->lsme_stripe_count - 1 :
+ start_stripe - 1);
+ *stripe_count = lsme->lsme_stripe_count;
+ } else {
+ for (j = 0, i = start_stripe; j < lsme->lsme_stripe_count;
+ i = (i + 1) % lsme->lsme_stripe_count, j++) {
+ if ((lov_stripe_intersects(lsm, index, i, ext,
+ &obd_start, &obd_end)) == 0)
+ break;
+ }
+ *stripe_count = j;
+ last_stripe = (start_stripe + j - 1) % lsme->lsme_stripe_count;
+ }
+
+ return last_stripe;
+}
+
+/**
+ * Set fe_device and copy extents from local buffer into main return buffer.
+ *
+ * \param fiemap [out] fiemap to hold all extents
+ * \param lcl_fm_ext [in] array of fiemap extents get from OSC layer
+ * \param ost_index [in] OST index to be written into the fm_device
+ * field for each extent
+ * \param ext_count [in] number of extents to be copied
+ * \param current_extent [in] where to start copying in the extent array
+ */
+static void fiemap_prepare_and_copy_exts(struct fiemap *fiemap,
+ struct fiemap_extent *lcl_fm_ext,
+ int ost_index, unsigned int ext_count,
+ int current_extent)
+{
+ char *to;
+ unsigned int ext;
+
+ for (ext = 0; ext < ext_count; ext++) {
+ lcl_fm_ext[ext].fe_device = ost_index;
+ lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
+ }
+
+ /* Copy fm_extent's from fm_local to return buffer */
+ to = (char *)fiemap + fiemap_count_to_size(current_extent);
+ memcpy(to, lcl_fm_ext, ext_count * sizeof(struct fiemap_extent));
+}
+
+#define FIEMAP_BUFFER_SIZE 4096
+
+/**
+ * Non-zero fe_logical indicates that this is a continuation FIEMAP
+ * call. The local end offset and the device are sent in the first
+ * fm_extent. This function calculates the stripe number from the index.
+ * This function returns a stripe_no on which mapping is to be restarted.
+ *
+ * This function returns fm_end_offset which is the in-OST offset at which
+ * mapping should be restarted. If fm_end_offset=0 is returned then caller
+ * will re-calculate proper offset in next stripe.
+ * Note that the first extent is passed to lov_get_info via the value field.
+ *
+ * \param fiemap [in] fiemap request header
+ * \param lsm [in] striping information for the file
+ * \param index [in] stripe component index
+ * \param ext [in] logical extent of mapping
+ * \param start_stripe [out] starting stripe will be returned in this
+ */
+static u64 fiemap_calc_fm_end_offset(struct fiemap *fiemap,
+ struct lov_stripe_md *lsm,
+ int index, struct lu_extent *ext,
+ int *start_stripe)
+{
+ struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
+ u64 local_end = fiemap->fm_extents[0].fe_logical;
+ u64 lun_start;
+ u64 lun_end;
+ u64 fm_end_offset;
+ int stripe_no = -1;
+ int i;
+
+ if (fiemap->fm_extent_count == 0 ||
+ fiemap->fm_extents[0].fe_logical == 0)
+ return 0;
+
+ /* Find out stripe_no from ost_index saved in the fe_device */
+ for (i = 0; i < lsme->lsme_stripe_count; i++) {
+ struct lov_oinfo *oinfo = lsme->lsme_oinfo[i];
+
+ if (lov_oinfo_is_dummy(oinfo))
+ continue;
+
+ if (oinfo->loi_ost_idx == fiemap->fm_extents[0].fe_device) {
+ stripe_no = i;
+ break;
+ }
+ }
+
+ if (stripe_no == -1)
+ return -EINVAL;
+
+ /* If we have finished mapping on previous device, shift logical
+ * offset to start of next device */
+ if (lov_stripe_intersects(lsm, index, stripe_no, ext,
+ &lun_start, &lun_end) != 0 &&
+ local_end < lun_end) {
+ fm_end_offset = local_end;
+ *start_stripe = stripe_no;
+ } else {
+ /* This is a special value to indicate that caller should
+ * calculate offset in next stripe. */
+ fm_end_offset = 0;
+ *start_stripe = (stripe_no + 1) % lsme->lsme_stripe_count;
+ }
+
+ return fm_end_offset;
+}
+
+struct fiemap_state {
+ struct fiemap *fs_fm;
+ struct lu_extent fs_ext;
+ u64 fs_length;
+ u64 fs_end_offset;
+ int fs_cur_extent;
+ int fs_cnt_need;
+ int fs_start_stripe;
+ int fs_last_stripe;
+ bool fs_device_done;
+ bool fs_finish_stripe;
+ bool fs_enough;
+};
+
+static struct cl_object *lov_find_subobj(const struct lu_env *env,
+ struct lov_object *lov,
+ struct lov_stripe_md *lsm,
+ int index)
+{
+ struct lov_device *dev = lu2lov_dev(lov2lu(lov)->lo_dev);
+ struct lov_thread_info *lti = lov_env_info(env);
+ struct lu_fid *ofid = <i->lti_fid;
+ struct lov_oinfo *oinfo;
+ struct cl_device *subdev;
+ int entry = lov_comp_entry(index);
+ int stripe = lov_comp_stripe(index);
+ int ost_idx;
+ int rc;
+ struct cl_object *result;
+
+ if (lov->lo_type != LLT_COMP)
+ GOTO(out, result = NULL);
+
+ if (entry >= lsm->lsm_entry_count ||
+ stripe >= lsm->lsm_entries[entry]->lsme_stripe_count)
+ GOTO(out, result = NULL);
+
+ oinfo = lsm->lsm_entries[entry]->lsme_oinfo[stripe];
+ ost_idx = oinfo->loi_ost_idx;
+ rc = ostid_to_fid(ofid, &oinfo->loi_oi, ost_idx);
+ if (rc != 0)
+ GOTO(out, result = NULL);
+
+ subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
+ result = lov_sub_find(env, subdev, ofid, NULL);
+out:
+ if (result == NULL)
+ result = ERR_PTR(-EINVAL);
+ return result;
+}
+
+int fiemap_for_stripe(const struct lu_env *env, struct cl_object *obj,
+ struct lov_stripe_md *lsm, struct fiemap *fiemap,
+ size_t *buflen, struct ll_fiemap_info_key *fmkey,
+ int index, int stripeno, struct fiemap_state *fs)
+{
+ struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
+ struct cl_object *subobj;
+ struct lov_obd *lov = lu2lov_dev(obj->co_lu.lo_dev)->ld_lov;
+ struct fiemap_extent *fm_ext = &fs->fs_fm->fm_extents[0];
+ u64 req_fm_len; /* Stores length of required mapping */
+ u64 len_mapped_single_call;
+ u64 lun_start;
+ u64 lun_end;
+ u64 obd_object_end;
+ unsigned int ext_count;
+ /* EOF for object */
+ bool ost_eof = false;
+ /* done with required mapping for this OST? */
+ bool ost_done = false;
+ int ost_index;
+ int rc = 0;
+
+ fs->fs_device_done = false;
+ /* Find out range of mapping on this stripe */
+ if ((lov_stripe_intersects(lsm, index, stripeno, &fs->fs_ext,
+ &lun_start, &obd_object_end)) == 0)
+ return 0;
+
+ if (lov_oinfo_is_dummy(lsme->lsme_oinfo[stripeno]))
+ return -EIO;
+
+ /* If this is a continuation FIEMAP call and we are on
+ * starting stripe then lun_start needs to be set to
+ * end_offset */
+ if (fs->fs_end_offset != 0 && stripeno == fs->fs_start_stripe)
+ lun_start = fs->fs_end_offset;
+ lun_end = lov_size_to_stripe(lsm, index, fs->fs_ext.e_end, stripeno);
+ if (lun_start == lun_end)
+ return 0;
+
+ req_fm_len = obd_object_end - lun_start + 1;
+ fs->fs_fm->fm_length = 0;
+ len_mapped_single_call = 0;
+
+ /* find lobsub object */
+ subobj = lov_find_subobj(env, cl2lov(obj), lsm,
+ lov_comp_index(index, stripeno));
+ if (IS_ERR(subobj))
+ return PTR_ERR(subobj);
+ /* If the output buffer is very large and the objects have many
+ * extents we may need to loop on a single OST repeatedly */
+ do {
+ if (fiemap->fm_extent_count > 0) {
+ /* Don't get too many extents. */
+ if (fs->fs_cur_extent + fs->fs_cnt_need >
+ fiemap->fm_extent_count)
+ fs->fs_cnt_need = fiemap->fm_extent_count -
+ fs->fs_cur_extent;
+ }
+
+ lun_start += len_mapped_single_call;
+ fs->fs_fm->fm_length = req_fm_len - len_mapped_single_call;
+ req_fm_len = fs->fs_fm->fm_length;
+ /**
+ * If we've collected enough extent map, we'd request 1 more,
+ * to see whether we coincidentally finished all available
+ * extent map, so that FIEMAP_EXTENT_LAST would be set.
+ */
+ fs->fs_fm->fm_extent_count = fs->fs_enough ?
+ 1 : fs->fs_cnt_need;
+ fs->fs_fm->fm_mapped_extents = 0;
+ fs->fs_fm->fm_flags = fiemap->fm_flags;
+
+ ost_index = lsme->lsme_oinfo[stripeno]->loi_ost_idx;
+
+ if (ost_index < 0 || ost_index >= lov->desc.ld_tgt_count)
+ GOTO(obj_put, rc = -EINVAL);
+ /* If OST is inactive, return extent with UNKNOWN flag. */
+ if (!lov->lov_tgts[ost_index]->ltd_active) {
+ fs->fs_fm->fm_flags |= FIEMAP_EXTENT_LAST;
+ fs->fs_fm->fm_mapped_extents = 1;
+
+ fm_ext[0].fe_logical = lun_start;
+ fm_ext[0].fe_length = obd_object_end - lun_start + 1;
+ fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
+
+ goto inactive_tgt;
+ }
+
+ fs->fs_fm->fm_start = lun_start;
+ fs->fs_fm->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
+ memcpy(&fmkey->lfik_fiemap, fs->fs_fm, sizeof(*fs->fs_fm));
+ *buflen = fiemap_count_to_size(fs->fs_fm->fm_extent_count);
+
+ rc = cl_object_fiemap(env, subobj, fmkey, fs->fs_fm, buflen);
+ if (rc != 0)
+ GOTO(obj_put, rc);
+inactive_tgt:
+ ext_count = fs->fs_fm->fm_mapped_extents;
+ if (ext_count == 0) {
+ ost_done = true;
+ fs->fs_device_done = true;
+ /* If last stripe has hold at the end,
+ * we need to return */
+ if (stripeno == fs->fs_last_stripe) {
+ fiemap->fm_mapped_extents = 0;
+ fs->fs_finish_stripe = true;
+ GOTO(obj_put, rc);
+ }
+ break;
+ } else if (fs->fs_enough) {
+ /*
+ * We've collected enough extents and there are
+ * more extents after it.
+ */
+ GOTO(obj_put, rc);
+ }
+
+ /* If we just need num of extents, got to next device */
+ if (fiemap->fm_extent_count == 0) {
+ fs->fs_cur_extent += ext_count;
+ break;
+ }
+
+ /* prepare to copy retrived map extents */
+ len_mapped_single_call = fm_ext[ext_count - 1].fe_logical +
+ fm_ext[ext_count - 1].fe_length -
+ lun_start;
+
+ /* Have we finished mapping on this device? */
+ if (req_fm_len <= len_mapped_single_call) {
+ ost_done = true;
+ fs->fs_device_done = true;
+ }
+
+ /* Clear the EXTENT_LAST flag which can be present on
+ * the last extent */
+ if (fm_ext[ext_count - 1].fe_flags & FIEMAP_EXTENT_LAST)
+ fm_ext[ext_count - 1].fe_flags &= ~FIEMAP_EXTENT_LAST;
+ if (lov_stripe_size(lsm, index,
+ fm_ext[ext_count - 1].fe_logical +
+ fm_ext[ext_count - 1].fe_length,
+ stripeno) >= fmkey->lfik_oa.o_size) {
+ ost_eof = true;
+ fs->fs_device_done = true;
+ }
+
+ fiemap_prepare_and_copy_exts(fiemap, fm_ext, ost_index,
+ ext_count, fs->fs_cur_extent);
+ fs->fs_cur_extent += ext_count;
+
+ /* Ran out of available extents? */
+ if (fs->fs_cur_extent >= fiemap->fm_extent_count)
+ fs->fs_enough = true;
+ } while (!ost_done && !ost_eof);
+
+ if (stripeno == fs->fs_last_stripe)
+ fs->fs_finish_stripe = true;
+obj_put:
+ cl_object_put(env, subobj);
+
+ return rc;
+}
+
+/**
+ * Break down the FIEMAP request and send appropriate calls to individual OSTs.
+ * This also handles the restarting of FIEMAP calls in case mapping overflows
+ * the available number of extents in single call.
+ *
+ * \param env [in] lustre environment
+ * \param obj [in] file object
+ * \param fmkey [in] fiemap request header and other info
+ * \param fiemap [out] fiemap buffer holding retrived map extents
+ * \param buflen [in/out] max buffer length of @fiemap, when iterate
+ * each OST, it is used to limit max map needed
+ * \retval 0 success
+ * \retval < 0 error
+ */
+static int lov_object_fiemap(const struct lu_env *env, struct cl_object *obj,
+ struct ll_fiemap_info_key *fmkey,
+ struct fiemap *fiemap, size_t *buflen)
+{
+ struct lov_stripe_md_entry *lsme;
+ struct lov_stripe_md *lsm;
+ struct fiemap *fm_local = NULL;
+ loff_t whole_start;
+ loff_t whole_end;
+ int entry;
+ int start_entry;
+ int end_entry;
+ int cur_stripe = 0;
+ int stripe_count;
+ unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
+ int rc = 0;
+ struct fiemap_state fs = { 0 };
+ ENTRY;
+
+ lsm = lov_lsm_addref(cl2lov(obj));
+ if (lsm == NULL) {
+ /* no extent: there is no object for mapping */
+ fiemap->fm_mapped_extents = 0;
+ return 0;
+ }
+
+ if (!(fiemap->fm_flags & FIEMAP_FLAG_DEVICE_ORDER)) {
+ /**
+ * If the entry count > 1 or stripe_count > 1 and the
+ * application does not understand DEVICE_ORDER flag,
+ * it cannot interpret the extents correctly.
+ */
+ if (lsm->lsm_entry_count > 1 ||
+ (lsm->lsm_entry_count == 1 &&
+ lsm->lsm_entries[0]->lsme_stripe_count > 1))
+ GOTO(out_lsm, rc = -ENOTSUPP);
+ }
+
+ /* No support for DOM layout yet. */
+ if (lsme_is_dom(lsm->lsm_entries[0]))
+ GOTO(out_lsm, rc = -ENOTSUPP);
+
+ if (lsm->lsm_is_released) {
+ if (fiemap->fm_start < fmkey->lfik_oa.o_size) {
+ /**
+ * released file, return a minimal FIEMAP if
+ * request fits in file-size.
+ */
+ fiemap->fm_mapped_extents = 1;
+ fiemap->fm_extents[0].fe_logical = fiemap->fm_start;
+ if (fiemap->fm_start + fiemap->fm_length <
+ fmkey->lfik_oa.o_size)
+ fiemap->fm_extents[0].fe_length =
+ fiemap->fm_length;
+ else
+ fiemap->fm_extents[0].fe_length =
+ fmkey->lfik_oa.o_size -
+ fiemap->fm_start;
+ fiemap->fm_extents[0].fe_flags |=
+ FIEMAP_EXTENT_UNKNOWN | FIEMAP_EXTENT_LAST;
+ }
+ GOTO(out_lsm, rc = 0);
+ }
+
+ /* buffer_size is small to hold fm_extent_count of extents. */
+ if (fiemap_count_to_size(fiemap->fm_extent_count) < buffer_size)
+ buffer_size = fiemap_count_to_size(fiemap->fm_extent_count);
+
+ OBD_ALLOC_LARGE(fm_local, buffer_size);
+ if (fm_local == NULL)
+ GOTO(out_lsm, rc = -ENOMEM);
+
+ /**
+ * Requested extent count exceeds the fiemap buffer size, shrink our
+ * ambition.
+ */
+ if (fiemap_count_to_size(fiemap->fm_extent_count) > *buflen)
+ fiemap->fm_extent_count = fiemap_size_to_count(*buflen);
+ if (fiemap->fm_extent_count == 0)
+ fs.fs_cnt_need = 0;
+
+ fs.fs_enough = false;
+ fs.fs_cur_extent = 0;
+ fs.fs_fm = fm_local;
+ fs.fs_cnt_need = fiemap_size_to_count(buffer_size);
+
+ whole_start = fiemap->fm_start;
+ /* whole_start is beyond the end of the file */
+ if (whole_start > fmkey->lfik_oa.o_size)
+ GOTO(out_fm_local, rc = -EINVAL);
+ whole_end = (fiemap->fm_length == OBD_OBJECT_EOF) ?
+ fmkey->lfik_oa.o_size :
+ whole_start + fiemap->fm_length - 1;
+ /**
+ * If fiemap->fm_length != OBD_OBJECT_EOF but whole_end exceeds file
+ * size
+ */
+ if (whole_end > fmkey->lfik_oa.o_size)
+ whole_end = fmkey->lfik_oa.o_size;
+
+ start_entry = lov_lsm_entry(lsm, whole_start);
+ end_entry = lov_lsm_entry(lsm, whole_end);
+ if (end_entry == -1)
+ end_entry = lsm->lsm_entry_count - 1;
+
+ if (start_entry == -1 || end_entry == -1)
+ GOTO(out_fm_local, rc = -EINVAL);
+
+ /* TODO: rewrite it with lov_foreach_io_layout() */
+ for (entry = start_entry; entry <= end_entry; entry++) {
+ lsme = lsm->lsm_entries[entry];
+
+ if (!lsme_inited(lsme))
+ break;
+
+ if (entry == start_entry)
+ fs.fs_ext.e_start = whole_start;
+ else
+ fs.fs_ext.e_start = lsme->lsme_extent.e_start;
+ if (entry == end_entry)
+ fs.fs_ext.e_end = whole_end;
+ else
+ fs.fs_ext.e_end = lsme->lsme_extent.e_end - 1;
+ fs.fs_length = fs.fs_ext.e_end - fs.fs_ext.e_start + 1;
+
+ /* Calculate start stripe, last stripe and length of mapping */
+ fs.fs_start_stripe = lov_stripe_number(lsm, entry,
+ fs.fs_ext.e_start);
+ fs.fs_last_stripe = fiemap_calc_last_stripe(lsm, entry,
+ &fs.fs_ext, fs.fs_start_stripe,
+ &stripe_count);
+ fs.fs_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, entry,
+ &fs.fs_ext, &fs.fs_start_stripe);
+ /* Check each stripe */
+ for (cur_stripe = fs.fs_start_stripe; stripe_count > 0;
+ --stripe_count,
+ cur_stripe = (cur_stripe + 1) % lsme->lsme_stripe_count) {
+ rc = fiemap_for_stripe(env, obj, lsm, fiemap, buflen,
+ fmkey, entry, cur_stripe, &fs);
+ if (rc < 0)
+ GOTO(out_fm_local, rc);
+ if (fs.fs_enough)
+ GOTO(finish, rc);
+ if (fs.fs_finish_stripe)
+ break;
+ } /* for each stripe */
+ } /* for covering layout component */
+ /*
+ * We've traversed all components, set @entry to the last component
+ * entry, it's for the last stripe check.
+ */
+ entry--;
+finish:
+ /* Indicate that we are returning device offsets unless file just has
+ * single stripe */
+ if (lsm->lsm_entry_count > 1 ||
+ (lsm->lsm_entry_count == 1 &&
+ lsm->lsm_entries[0]->lsme_stripe_count > 1))
+ fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
+
+ if (fiemap->fm_extent_count == 0)
+ goto skip_last_device_calc;
+
+ /* Check if we have reached the last stripe and whether mapping for that
+ * stripe is done. */
+ if ((cur_stripe == fs.fs_last_stripe) && fs.fs_device_done)
+ fiemap->fm_extents[fs.fs_cur_extent - 1].fe_flags |=
+ FIEMAP_EXTENT_LAST;
+skip_last_device_calc:
+ fiemap->fm_mapped_extents = fs.fs_cur_extent;
+out_fm_local:
+ OBD_FREE_LARGE(fm_local, buffer_size);
+
+out_lsm:
+ lov_lsm_put(lsm);
+ return rc;
+}
+
static int lov_object_getstripe(const struct lu_env *env, struct cl_object *obj,
- struct lov_user_md __user *lum)
+ struct lov_user_md __user *lum, size_t size)
{
struct lov_object *lov = cl2lov(obj);
struct lov_stripe_md *lsm;
if (lsm == NULL)
RETURN(-ENODATA);
- rc = lov_getstripe(cl2lov(obj), lsm, lum);
- lov_lsm_put(obj, lsm);
+ rc = lov_getstripe(env, cl2lov(obj), lsm, lum, size);
+ lov_lsm_put(lsm);
RETURN(rc);
}
+static int lov_object_layout_get(const struct lu_env *env,
+ struct cl_object *obj,
+ struct cl_layout *cl)
+{
+ struct lov_object *lov = cl2lov(obj);
+ struct lov_stripe_md *lsm = lov_lsm_addref(lov);
+ struct lu_buf *buf = &cl->cl_buf;
+ ssize_t rc;
+ ENTRY;
+
+ if (lsm == NULL) {
+ cl->cl_size = 0;
+ cl->cl_layout_gen = CL_LAYOUT_GEN_EMPTY;
+
+ RETURN(0);
+ }
+
+ cl->cl_size = lov_comp_md_size(lsm);
+ cl->cl_layout_gen = lsm->lsm_layout_gen;
+ cl->cl_dom_comp_size = 0;
+ cl->cl_is_released = lsm->lsm_is_released;
+ if (lsm_is_composite(lsm->lsm_magic)) {
+ struct lov_stripe_md_entry *lsme = lsm->lsm_entries[0];
+
+ cl->cl_is_composite = true;
+
+ if (lsme_is_dom(lsme))
+ cl->cl_dom_comp_size = lsme->lsme_extent.e_end;
+ } else {
+ cl->cl_is_composite = false;
+ }
+
+ rc = lov_lsm_pack(lsm, buf->lb_buf, buf->lb_len);
+ lov_lsm_put(lsm);
+
+ RETURN(rc < 0 ? rc : 0);
+}
+
+static loff_t lov_object_maxbytes(struct cl_object *obj)
+{
+ struct lov_object *lov = cl2lov(obj);
+ struct lov_stripe_md *lsm = lov_lsm_addref(lov);
+ loff_t maxbytes;
+
+ if (lsm == NULL)
+ return LLONG_MAX;
+
+ maxbytes = lsm->lsm_maxbytes;
+
+ lov_lsm_put(lsm);
+
+ return maxbytes;
+}
+
+static int lov_object_flush(const struct lu_env *env, struct cl_object *obj,
+ struct ldlm_lock *lock)
+{
+ return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_flush, env, obj, lock);
+}
+
static const struct cl_object_operations lov_ops = {
- .coo_page_init = lov_page_init,
- .coo_lock_init = lov_lock_init,
- .coo_io_init = lov_io_init,
- .coo_attr_get = lov_attr_get,
- .coo_attr_set = lov_attr_set,
- .coo_conf_set = lov_conf_set,
- .coo_getstripe = lov_object_getstripe
+ .coo_page_init = lov_page_init,
+ .coo_lock_init = lov_lock_init,
+ .coo_io_init = lov_io_init,
+ .coo_attr_get = lov_attr_get,
+ .coo_attr_update = lov_attr_update,
+ .coo_conf_set = lov_conf_set,
+ .coo_getstripe = lov_object_getstripe,
+ .coo_layout_get = lov_object_layout_get,
+ .coo_maxbytes = lov_object_maxbytes,
+ .coo_fiemap = lov_object_fiemap,
+ .coo_object_flush = lov_object_flush
};
static const struct lu_object_operations lov_lu_obj_ops = {
lov_conf_freeze(lov);
switch (lov->lo_type) {
- case LLT_RAID0: {
+ case LLT_COMP: {
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];
+ for (i = 0; i < lsm->lsm_entry_count; i++) {
+ struct lov_stripe_md_entry *lse =
+ lsm->lsm_entries[i];
+ int j;
+
+ if (!lsme_inited(lse))
+ break;
- if (lov_oinfo_is_dummy(loi))
- continue;
+ for (j = 0; j < lse->lsme_stripe_count; j++) {
+ struct lov_oinfo *loi =
+ lse->lsme_oinfo[j];
- if (loi->loi_ar.ar_rc && !rc)
- rc = loi->loi_ar.ar_rc;
- loi->loi_ar.ar_rc = 0;
+ if (lov_oinfo_is_dummy(loi))
+ continue;
+
+ if (loi->loi_ar.ar_rc && !rc)
+ rc = loi->loi_ar.ar_rc;
+ loi->loi_ar.ar_rc = 0;
+ }
}
}
case LLT_RELEASED:
case LLT_EMPTY:
+ /* fall through */
+ case LLT_FOREIGN:
break;
default:
LBUG();
git://git.whamcloud.com / fs / lustre-release.git / blobdiff