* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2016, 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"
static inline struct lov_device *lov_object_dev(struct lov_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);
* Lov object layout operations.
*
*/
-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)
+
+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)
{
- return 0;
+ struct lu_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));
}
-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 *subobj, struct lov_layout_raid0 *r0,
- struct lov_oinfo *oinfo, int idx)
+ struct cl_object *subobj, struct lov_oinfo *oinfo,
+ int idx)
{
struct cl_object_header *hdr;
struct cl_object_header *subhdr;
return -EIO;
}
- hdr = cl_object_header(lov2cl(lov));
+ hdr = cl_object_header(lov2cl(lov));
subhdr = cl_object_header(subobj);
CDEBUG(D_INODE, DFID"@%p[%d:%d] -> "DFID"@%p: ostid: "DOSTID
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(&subobj->co_lu, "lov-parent", lov);
- r0->lo_sub[stripe] = cl2lovsub(subobj);
- r0->lo_sub[stripe]->lso_super = lov;
- r0->lo_sub[stripe]->lso_index = idx;
+ lso->lso_super = lov;
+ lso->lso_index = idx;
result = 0;
} else {
struct lu_object *old_obj;
return result;
}
-static int lov_page_slice_fixup(struct lov_object *lov,
- struct cl_object *stripe)
-{
- 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));
-
- 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_raid0(const struct lu_env *env, struct lov_device *dev,
- struct lov_object *lov, int index,
- struct lov_layout_raid0 *r0)
+ 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 cl_object_conf *subconf = <i->lti_stripe_conf;
- struct lu_fid *ofid = <i->lti_fid;
- struct cl_object *stripe;
+ 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;
+ int psz, sz;
int i;
ENTRY;
spin_lock_init(&r0->lo_sub_lock);
r0->lo_nr = lse->lsme_stripe_count;
- LASSERT(r0->lo_nr <= lov_targets_nr(dev));
- OBD_ALLOC_LARGE(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)
GOTO(out, result = -ENOMEM);
if (IS_ERR(stripe))
GOTO(out, result = PTR_ERR(stripe));
- result = lov_init_sub(env, lov, stripe, r0, oinfo,
+ result = lov_init_sub(env, lov, stripe, oinfo,
lov_comp_index(index, i));
if (result == -EAGAIN) { /* try again */
--i;
}
if (result == 0) {
- int sz = lov_page_slice_fixup(lov, stripe);
+ r0->lo_sub[i] = cl2lovsub(stripe);
+
+ sz = lov_page_slice_fixup(lov, stripe);
LASSERT(ergo(psz > 0, psz == sz));
psz = sz;
}
RETURN(result);
}
+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 lu_site *site;
+ wait_queue_head_t *wq;
+ wait_queue_entry_t *waiter;
+
+ LASSERT(r0->lo_sub[idx] == los);
+
+ 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_free() */
+ if (r0->lo_sub[idx] == los) {
+ waiter = &lov_env_info(env)->lti_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
+ * lu_object_free(). */
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ spin_lock(&r0->lo_sub_lock);
+ if (r0->lo_sub[idx] == los) {
+ spin_unlock(&r0->lo_sub_lock);
+ schedule();
+ } else {
+ spin_unlock(&r0->lo_sub_lock);
+ set_current_state(TASK_RUNNING);
+ break;
+ }
+ }
+ remove_wait_queue(wq, waiter);
+ }
+ LASSERT(r0->lo_sub[idx] == NULL);
+}
+
+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;
- int i;
+ unsigned int seq;
+ int i, j;
ENTRY;
lov->lo_lsm = lsm_addref(lsm);
lov->lo_layout_invalid = true;
+ dump_lsm(D_INODE, lsm);
+
entry_count = lsm->lsm_entry_count;
- comp->lo_entry_count = 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);
- for (i = 0; i < entry_count; i++) {
- struct lov_layout_entry *le = &comp->lo_entries[i];
+ /* 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);
- le->lle_extent = lsm->lsm_entries[i]->lsme_extent;
/**
* 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 (!lsm_entry_inited(lsm, i))
- break;
+ if (!lsme_inited(lle->lle_lsme))
+ continue;
- result = lov_init_raid0(env, dev, lov, i, &le->lle_raid0);
+ 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;
- return result > 0 ? 0 : result;
-}
+ /* 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;
-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);
+ lre = lov_mirror_entry(lov, idx);
+ if (lre->lre_stale)
+ continue;
- lov->lo_lsm = lsm_addref(lsm);
- return 0;
-}
+ mirror_count++; /* valid mirror */
-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 (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))));
- if (entry >= lsm->lsm_entry_count ||
- stripe >= lsm->lsm_entries[entry]->lsme_stripe_count)
- GOTO(out, result = NULL);
+ comp->lo_preferred_mirror = 0;
+ }
- 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);
+ LASSERT(comp->lo_preferred_mirror >= 0);
- subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
- result = lov_sub_find(env, subdev, ofid, NULL);
+ EXIT;
out:
- if (result == NULL)
- result = ERR_PTR(-EINVAL);
- return result;
+ return result > 0 ? 0 : result;
}
-static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
- union lov_layout_state *state)
+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)
{
- 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)
+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)
{
- struct cl_object *sub;
- struct lu_site *site;
- struct lu_site_bkt_data *bkt;
- wait_queue_t *waiter;
-
- 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);
- cl_object_put(env, sub);
+ LASSERT(lsm != NULL);
+ LASSERT(lsm->lsm_is_released);
+ LASSERT(lov->lo_lsm == NULL);
- /* ... wait until it is actually destroyed---sub-object clears its
- * ->lo_sub[] slot in lovsub_object_fini() */
- if (r0->lo_sub[idx] == los) {
- waiter = &lov_env_info(env)->lti_waiter;
- init_waitqueue_entry(waiter, current);
- add_wait_queue(&bkt->lsb_marche_funebre, waiter);
- set_current_state(TASK_UNINTERRUPTIBLE);
- while (1) {
- /* this wait-queue is signaled at the end of
- * lu_object_free(). */
- set_current_state(TASK_UNINTERRUPTIBLE);
- spin_lock(&r0->lo_sub_lock);
- if (r0->lo_sub[idx] == los) {
- spin_unlock(&r0->lo_sub_lock);
- schedule();
- } else {
- spin_unlock(&r0->lo_sub_lock);
- set_current_state(TASK_RUNNING);
- break;
- }
- }
- remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
- }
- LASSERT(r0->lo_sub[idx] == NULL);
+ lov->lo_lsm = lsm_addref(lsm);
+ return 0;
}
-static void lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
- struct lov_layout_raid0 *r0)
+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)
{
- ENTRY;
-
- if (r0->lo_sub != NULL) {
- int i;
+ LASSERT(lsm != NULL);
+ LASSERT(lov->lo_type == LLT_FOREIGN);
+ LASSERT(lov->lo_lsm == NULL);
- for (i = 0; i < r0->lo_nr; ++i) {
- struct lovsub_object *los = r0->lo_sub[i];
+ lov->lo_lsm = lsm_addref(lsm);
+ return 0;
+}
- 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);
- }
- }
- }
+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);
- EXIT;
+ lov_layout_wait(env, lov);
+ return 0;
}
static int lov_delete_composite(const struct lu_env *env,
lov_layout_wait(env, lov);
if (comp->lo_entries)
lov_foreach_layout_entry(lov, entry)
- lov_delete_raid0(env, lov, &entry->lle_raid0);
+ lov_delete_raid0(env, lov, entry);
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_layout_raid0 *r0)
-{
- if (r0->lo_sub != NULL) {
- OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
- r0->lo_sub = NULL;
- }
-}
-
static void lov_fini_composite(const struct lu_env *env,
struct lov_object *lov,
union lov_layout_state *state)
struct lov_layout_entry *entry;
lov_foreach_layout_entry(lov, entry)
- lov_fini_raid0(env, &entry->lle_raid0);
+ 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, struct lov_layout_raid0 *r0)
-{
- 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_print_composite(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *o)
{
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, %u, %#x, %u, %u }\n",
+ (*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_layout_gen, lse->lsme_flags,
- lse->lsme_stripe_count, lse->lsme_stripe_size);
- lov_print_raid0(env, cookie, p, lov_r0(lov, i));
+ 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;
return 0;
}
+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,
+ "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_layout_gen);
+ (*p)(env, cookie,
+ "raw_ea_content '%.*s'\n",
+ (int)lsm->lsm_foreign_size, (char *)lsm_foreign(lsm));
+ return 0;
+}
+
/**
* Implements cl_object_operations::coo_attr_get() method for an object
* without stripes (LLT_EMPTY layout type).
return 0;
}
-static int lov_attr_get_raid0(const struct lu_env *env, struct lov_object *lov,
- unsigned int index, struct lov_layout_raid0 *r0)
-
-{
- 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)
- 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;
- }
-
- return result;
-}
-
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_entry *entry;
int result = 0;
- int index = 0;
ENTRY;
attr->cat_size = 0;
attr->cat_blocks = 0;
lov_foreach_layout_entry(lov, entry) {
- struct lov_layout_raid0 *r0 = &entry->lle_raid0;
- struct cl_attr *lov_attr = &r0->lo_attr;
+ 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))
- break;
+ continue;
- result = lov_attr_get_raid0(env, lov, index, r0);
- if (result != 0)
- break;
+ result = entry->lle_comp_ops->lco_getattr(env, lov, index,
+ entry, &lov_attr);
+ if (result < 0)
+ RETURN(result);
- index++;
+ 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_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_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,
+ [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,
+ },
+ [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_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,
},
};
lsm->lsm_magic == LOV_MAGIC_COMP_V1)
return LLT_COMP;
+ if (lsm->lsm_magic == LOV_MAGIC_FOREIGN)
+ return LLT_FOREIGN;
+
return LLT_EMPTY;
}
CDEBUG(D_INODE, DFID "Apply new layout lov %p, type %d\n",
PFID(lu_object_fid(lov2lu(lov))), lov, llt);
- lov->lo_type = LLT_EMPTY;
-
/* 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);
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);
}
- lov->lo_type = llt;
-
out:
cl_env_put(env, &refcheck);
RETURN(rc);
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);
}
/**
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,
if (lun_start == lun_end)
return 0;
- req_fm_len = obd_object_end - lun_start;
+ req_fm_len = obd_object_end - lun_start + 1;
fs->fs_fm->fm_length = 0;
len_mapped_single_call = 0;
fs->fs_fm->fm_mapped_extents = 1;
fm_ext[0].fe_logical = lun_start;
- fm_ext[0].fe_length = obd_object_end - lun_start;
+ fm_ext[0].fe_length = obd_object_end - lun_start + 1;
fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
goto inactive_tgt;
ENTRY;
lsm = lov_lsm_addref(cl2lov(obj));
- if (lsm == NULL)
- RETURN(-ENODATA);
+ 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)) {
/**
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) {
/**
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];
}
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);
+ rc = lov_getstripe(env, cl2lov(obj), lsm, lum, size);
lov_lsm_put(lsm);
RETURN(rc);
}
cl->cl_size = lov_comp_md_size(lsm);
cl->cl_layout_gen = lsm->lsm_layout_gen;
- cl->cl_is_composite = lsm_is_composite(lsm->lsm_magic);
+ 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 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_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 = {
}
case LLT_RELEASED:
case LLT_EMPTY:
+ /* fall through */
+ case LLT_FOREIGN:
break;
default:
LBUG();
git://git.whamcloud.com / fs / lustre-release.git / blobdiff