Viewing: lov_object.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*
* Implementation of cl_object for LOV layer.
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
* Author: Jinshan Xiong <jinshan.xiong@whamcloud.com>
*/
#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)
{
return lu2lov_dev(obj->lo_cl.co_lu.lo_dev);
}
/** \addtogroup lov
* @{
*/
/**
* Layout operations.
*/
struct lov_layout_operations {
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);
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_page *page, pgoff_t index);
int (*llo_dio_pages_init)(const struct lu_env *env,
struct cl_object *obj,
struct cl_dio_pages *cdp, pgoff_t index);
int (*llo_lock_init)(const struct lu_env *env,
struct cl_object *obj, struct cl_lock *lock,
const struct cl_io *io);
int (*llo_io_init)(const struct lu_env *env,
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);
static struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov);
static void lov_lsm_put(struct lov_stripe_md *lsm)
{
if (lsm != NULL)
lov_free_memmd(&lsm);
}
/**
* Lov object layout operations.
*/
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)
{
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 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;
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_oinfo *oinfo,
int idx)
{
struct cl_object_header *hdr;
struct cl_object_header *subhdr;
struct cl_object_header *parent;
int entry = lov_comp_entry(idx);
int stripe = lov_comp_stripe(idx);
int result;
if (CFS_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
/* For sanity:test_206.
* Do not leave the object in cache to avoid accessing
* freed memory. This is because osc_object is referring to
* lov_oinfo of lsm_stripe_data which will be freed due to
* this failure. */
cl_object_kill(env, subobj);
cl_object_put(env, subobj);
return -EIO;
}
hdr = cl_object_header(lov2cl(lov));
subhdr = cl_object_header(subobj);
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;
lso->lso_super = lov;
lso->lso_index = idx;
result = 0;
} else {
struct lu_object *old_obj;
struct lov_object *old_lov;
spin_unlock(&subhdr->coh_attr_guard);
old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
LASSERT(old_obj != NULL);
old_lov = cl2lov(lu2cl(old_obj));
if (test_bit(LO_LAYOUT_INVALID, &old_lov->lo_obj_flags)) {
/* the object's layout has already changed but isn't
* refreshed */
lu_object_unhash(env, &subobj->co_lu);
result = -EAGAIN;
} else {
result = -EIO;
}
LU_OBJECT_DEBUG(D_INODE, env, &subobj->co_lu,
"stripe %d is already owned.", idx);
LU_OBJECT_DEBUG(D_INODE, env, old_obj, "owned.");
LU_OBJECT_HEADER(D_INODE, env, lov2lu(lov), "try to own.\n");
cl_object_put(env, subobj);
}
return result;
}
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 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;
ENTRY;
spin_lock_init(&r0->lo_sub_lock);
r0->lo_nr = lse->lsme_stripe_count;
OBD_ALLOC_PTR_ARRAY_LARGE(r0->lo_sub, r0->lo_nr);
if (r0->lo_sub == NULL)
GOTO(out, result = -ENOMEM);
psz = 0;
result = 0;
memset(subconf, 0, sizeof(*subconf));
/*
* 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;
struct obd_export *exp;
if (lov_oinfo_is_dummy(oinfo))
continue;
result = ostid_to_fid(ofid, &oinfo->loi_oi, oinfo->loi_ost_idx);
if (result != 0)
GOTO(out, result);
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);
}
exp = lov_tgt(dev->ld_lov, ost_idx)->ltd_exp;
if (likely(exp)) {
/* the more fast OSTs the better */
if (exp->exp_obd->obd_osfs.os_state & OS_STATFS_NONROT)
lle->lle_preference++;
}
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() */
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;
}
if (result == 0) {
r0->lo_sub[i] = cl2lovsub(stripe);
sz = lov_page_slice_fixup(lov, stripe);
LASSERT(ergo(psz > 0, psz == sz));
psz = sz;
}
}
if (result == 0)
result = psz;
out:
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;
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 ... */
cl_object_put(env, sub);
/* ... wait until it is actually destroyed---sub-object clears its
* ->lo_sub[] slot in lovsub_object_free() */
io_wait_event(*wq, r0->lo_sub[idx] != los);
LASSERT(r0->lo_sub[idx] == NULL);
}
static int 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;
int rc;
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) {
rc = cl_object_prune(env, &los->lso_cl);
if (rc)
RETURN(rc);
/*
* If top-level object is to be evicted from
* the cache, so are its sub-objects.
*/
lov_subobject_kill(env, lov, r0, los, i);
}
}
}
RETURN(0);
}
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_PTR_ARRAY_LARGE(r0->lo_sub, r0->lo_nr);
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 cl_attr *attr = &r0->lo_attr;
int result = 0;
if (r0->lo_attr_valid) {
*lov_attr = attr;
return 0;
}
/*
* 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, attr);
lov_stripe_unlock(lsm);
if (result == 0) {
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)
{
struct lu_seq_range res = {0};
__u32 mds_idx;
int i, rc;
ENTRY;
rc = fld_client_lookup(&ld->ld_lmv->u.lmv.lmv_fld, fid_seq(fid),
LU_SEQ_RANGE_MDT, NULL, &res);
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);
}
mds_idx = res.lsr_index;
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;
/* DOM entry may be not zero index due to FLR but must start from 0 */
if (unlikely(lle->lle_extent->e_start != 0)) {
CERROR("%s: DOM entry must be the first stripe in a mirror\n",
lov2obd(dev->ld_lov)->obd_name);
dump_lsm(D_ERROR, lov->lo_lsm);
RETURN(-EINVAL);
}
/* 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;
lle->lle_dom.lo_mdt_idx = idx;
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, preference;
__u64 dom_size = 0;
ENTRY;
LASSERT(lsm->lsm_entry_count > 0);
LASSERT(lov->lo_lsm == NULL);
lov->lo_lsm = lsm_addref(lsm);
LASSERT(lov->lo_lsm);
set_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
dump_lsm(D_INODE, lsm);
entry_count = lsm->lsm_entry_count;
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_PTR_ARRAY(comp->lo_mirrors, comp->lo_mirror_count);
if (comp->lo_mirrors == NULL)
RETURN(-ENOMEM);
OBD_ALLOC_PTR_ARRAY(comp->lo_entries, entry_count);
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);
lle->lle_preference = 0;
switch (lle->lle_type) {
case LOV_PATTERN_RAID0:
fallthrough;
case LOV_PATTERN_RAID0 | LOV_PATTERN_PARITY:
lle->lle_comp_ops = &raid0_ops;
break;
case LOV_PATTERN_MDT:
/* Allowed to have several DOM stripes in different
* mirrors with the same DoM size.
*/
if (!dom_size) {
dom_size = lle->lle_lsme->lsme_extent.e_end;
} else if (dom_size !=
lle->lle_lsme->lsme_extent.e_end) {
CERROR("%s: DOM entries with different sizes\n",
lov2obd(dev->ld_lov)->obd_name);
dump_lsm(D_ERROR, lsm);
RETURN(-EINVAL);
}
lle->lle_comp_ops = &dom_ops;
break;
case LOV_PATTERN_FOREIGN:
lle->lle_comp_ops = NULL;
break;
default: {
static int nr;
static ktime_t time2_clear_nr;
ktime_t now = ktime_get();
lle->lle_comp_ops = NULL;
/* limit this message 20 times within 24h */
if (ktime_after(now, time2_clear_nr)) {
nr = 0;
time2_clear_nr = ktime_add_ms(now,
24 * 3600 * MSEC_PER_SEC);
}
if (nr++ < 20) {
CWARN("%s: unknown layout entry %d pattern %#x could be an unrecognizable component"
" set by other clients, skip to initialize the next component.\n",
lov2obd(dev->ld_lov)->obd_name,
i,
lsm->lsm_entries[i]->lsme_pattern);
dump_lsm(D_ERROR, lsm);
}
}
}
lle->lle_extent = &lle->lle_lsme->lsme_extent;
if (!lov_pattern_supported(lle->lle_lsme->lsme_pattern) ||
!lov_supported_comp_magic(lle->lle_lsme->lsme_magic))
lle->lle_valid = 0;
else
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_foreign |=
lsme_is_foreign(lle->lle_lsme);
lre->lre_parity |=
!!(lov_pattern(lle->lle_lsme->lsme_pattern) &
LOV_PATTERN_PARITY);
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_preference = lle->lle_lsme->lsme_flags &
LCME_FL_PREF_RD ? 1000 : 0;
lre->lre_valid = lle->lle_valid;
lre->lre_stale = !lle->lle_valid;
lre->lre_foreign = lsme_is_foreign(lle->lle_lsme);
lre->lre_parity = !!(lov_pattern(lle->lle_lsme->lsme_pattern) &
LOV_PATTERN_PARITY);
}
/* 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;
if (lsme_is_foreign(lle->lle_lsme))
continue;
if (!lov_pattern_supported(lle->lle_lsme->lsme_pattern) ||
!lov_supported_comp_magic(lle->lle_lsme->lsme_magic))
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;
preference = -1;
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;
if (lre->lre_foreign)
continue;
if (!lre->lre_valid)
continue;
/* skip parity mirrors for preferred mirror selection */
if (lre->lre_parity)
continue;
mirror_count++; /* valid mirror */
/* aggregated preference of all involved OSTs */
for (j = lre->lre_start; j <= lre->lre_end; j++) {
lre->lre_preference +=
comp->lo_entries[j].lle_preference;
}
if (lre->lre_preference > preference) {
preference = lre->lre_preference;
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);
LASSERT(lov->lo_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)
{
LASSERT(lsm != NULL);
LASSERT(lov->lo_type == LLT_FOREIGN);
LASSERT(lov->lo_lsm == NULL);
lov->lo_lsm = lsm_addref(lsm);
LASSERT(lov->lo_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;
int rc;
ENTRY;
dump_lsm(D_INODE, lov->lo_lsm);
lov_layout_wait(env, lov);
lov_foreach_layout_entry(lov, entry) {
struct lov_stripe_md_entry *lsme = entry->lle_lsme;
if (lsme) {
if (lsme_is_foreign(lsme))
continue;
if (!lov_pattern_supported(lsme->lsme_pattern) ||
!lov_supported_comp_magic(lsme->lsme_magic))
continue;
}
rc = lov_delete_raid0(env, lov, entry);
if (rc)
RETURN(rc);
}
RETURN(0);
}
static void lov_fini_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);
}
static void lov_fini_composite(const struct lu_env *env,
struct lov_object *lov,
union lov_layout_state *state)
{
struct lov_layout_composite *comp = &state->composite;
ENTRY;
if (comp->lo_entries != NULL) {
struct lov_layout_entry *entry;
lov_foreach_layout_entry(lov, entry)
if (entry->lle_comp_ops)
entry->lle_comp_ops->lco_fini(env, entry);
OBD_FREE_PTR_ARRAY(comp->lo_entries, comp->lo_entry_count);
comp->lo_entries = NULL;
}
if (comp->lo_mirrors != NULL) {
OBD_FREE_PTR_ARRAY(comp->lo_mirrors, comp->lo_mirror_count);
comp->lo_mirrors = NULL;
}
memset(comp, 0, sizeof(*comp));
dump_lsm(D_INODE, lov->lo_lsm);
lov_free_memmd(&lov->lo_lsm);
EXIT;
}
static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
union lov_layout_state *state)
{
ENTRY;
dump_lsm(D_INODE, lov->lo_lsm);
lov_free_memmd(&lov->lo_lsm);
EXIT;
}
static int lov_print_empty(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *o)
{
(*p)(env, cookie, "empty %d\n",
test_bit(LO_LAYOUT_INVALID, &lu2lov(o)->lo_obj_flags));
return 0;
}
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,
test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags) ? "invalid" :
"valid", lsm, lsm->lsm_magic, kref_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);
if (!lsme_is_foreign(lse))
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_stripe_md *lsm = lov->lo_lsm;
(*p)(env, cookie,
"released: %s, lsm{%p 0x%08X %d %u}:\n",
test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags) ? "invalid" :
"valid", lsm, lsm->lsm_magic, kref_read(&lsm->lsm_refc),
lsm->lsm_layout_gen);
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",
test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags) ?
"invalid" : "valid", lsm,
lsm->lsm_magic, kref_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).
*
* The only attributes this layer is authoritative in this case is
* cl_attr::cat_blocks---it's 0.
*/
static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
struct cl_attr *attr)
{
attr->cat_blocks = 0;
return 0;
}
/**
* The MDT returns st_blocks=1 for the HSM released file (See LU-3864).
* The LOV layouer should also return st_blocks=1 for the HSM released file
* in the call ->coo_attr_get().
* Otherwise, the client may get 0 block count. This caused tools like tar
* then to consider the file as fully sparse and to archive it as is without
* attempting to access/restore its content.
*/
static int lov_attr_get_released(const struct lu_env *env,
struct cl_object *obj, struct cl_attr *attr)
{
if (attr->cat_size == 0)
attr->cat_blocks = 0;
else
attr->cat_blocks = 1;
return 0;
}
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;
/*
* Preserve the incoming cat_size from VVP layer (i_size).
* If we don't find valid size from data components (e.g., when
* doing designated mirror IO to a parity mirror), we'll restore
* this value rather than returning 0.
*/
loff_t vvp_size = attr->cat_size;
bool got_data_size = false;
bool has_parity = false;
ENTRY;
attr->cat_size = 0;
attr->cat_blocks = 0;
attr->cat_kms = 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;
if (lsm_entry_is_foreign(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 */
/* Parity components: include blocks and timestamps, but not
* size/kms since they don't represent user data
*/
if (lsm_entry_is_parity(lov->lo_lsm, index))
has_parity = true;
if (!lsm_entry_is_parity(lov->lo_lsm, index)) {
if (lov_attr->cat_kms_valid)
attr->cat_kms_valid = 1;
if (attr->cat_size < lov_attr->cat_size) {
attr->cat_size = lov_attr->cat_size;
got_data_size = true;
}
if (attr->cat_kms < lov_attr->cat_kms)
attr->cat_kms = lov_attr->cat_kms;
}
/* Always include blocks and timestamps, even for parity */
attr->cat_blocks += lov_attr->cat_blocks;
if (attr->cat_atime < lov_attr->cat_atime)
attr->cat_atime = lov_attr->cat_atime;
if (attr->cat_ctime < lov_attr->cat_ctime)
attr->cat_ctime = lov_attr->cat_ctime;
if (attr->cat_mtime < lov_attr->cat_mtime)
attr->cat_mtime = lov_attr->cat_mtime;
}
/*
* EC layout, designated parity-mirror IO: the parity component
* has blocks but the data components didn't report a valid size
* (e.g. their attrs weren't refreshed by this IO). Preserve the
* VVP-layer i_size rather than returning 0 and clobbering the
* inode size in ll_merge_attr().
*/
if (has_parity && !got_data_size && attr->cat_blocks > 0)
attr->cat_size = vvp_size;
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 lov_layout_entry *lle;
int rc = -ENODATA;
ENTRY;
lov_foreach_layout_entry(lov, lle) {
if (!lsme_is_dom(lle->lle_lsme))
continue;
rc = cl_object_flush(env, lovsub2cl(lle->lle_dom.lo_dom), lock);
break;
}
RETURN(rc);
}
static int lov_flush_empty(const struct lu_env *env, struct cl_object *obj,
struct ldlm_lock *lock)
{
return 0;
}
static const 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_dio_pages_init = lov_dio_pages_init_empty,
.llo_lock_init = lov_lock_init_empty,
.llo_io_init = lov_io_init_empty,
.llo_getattr = lov_attr_get_empty,
.llo_flush = lov_flush_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_dio_pages_init = lov_dio_pages_init_empty,
.llo_lock_init = lov_lock_init_empty,
.llo_io_init = lov_io_init_released,
.llo_getattr = lov_attr_get_released,
.llo_flush = lov_flush_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_dio_pages_init = lov_dio_pages_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_dio_pages_init = lov_dio_pages_init_foreign,
.llo_lock_init = lov_lock_init_empty,
.llo_io_init = lov_io_init_empty,
.llo_getattr = lov_attr_get_empty,
.llo_flush = lov_flush_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(__llt < ARRAY_SIZE(lov_dispatch)); \
lov_dispatch[__llt].op(__VA_ARGS__); \
})
/**
* Return lov_layout_type associated with a given lsm
*/
static enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
{
if (lsm == NULL)
return LLT_EMPTY;
if (lsm->lsm_is_released)
return LLT_RELEASED;
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);
}
#define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
({ \
struct lov_object *__obj = (obj); \
int __lock = !!(lock); \
typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
\
if (__lock) \
lov_conf_freeze(__obj); \
__result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
if (__lock) \
lov_conf_thaw(__obj); \
__result; \
})
#define LOV_2DISPATCH_VOID(obj, op, ...) \
do { \
struct lov_object *__obj = (obj); \
enum lov_layout_type __llt; \
\
lov_conf_freeze(__obj); \
__llt = __obj->lo_type; \
LASSERT(__llt < ARRAY_SIZE(lov_dispatch)); \
lov_dispatch[__llt].op(__VA_ARGS__); \
lov_conf_thaw(__obj); \
} while (0)
static void lov_conf_lock(struct lov_object *lov)
{
LASSERT(lov->lo_owner != current);
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_wait(const struct lu_env *env, struct lov_object *lov)
{
ENTRY;
while (atomic_read(&lov->lo_active_ios) > 0) {
CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
PFID(lu_object_fid(lov2lu(lov))),
atomic_read(&lov->lo_active_ios));
wait_event_idle(lov->lo_waitq,
atomic_read(&lov->lo_active_ios) == 0);
}
RETURN(0);
}
static int lov_layout_change(const struct lu_env *unused,
struct lov_object *lov, struct lov_stripe_md *lsm,
const struct cl_object_conf *conf)
{
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;
struct lov_device *lov_dev = lov_object_dev(lov);
struct lu_env *env;
__u16 refcheck;
int rc;
ENTRY;
LASSERT(lov->lo_type < ARRAY_SIZE(lov_dispatch));
env = cl_env_get(&refcheck);
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))),
llt2str(lov->lo_type), llt2str(llt));
old_ops = &lov_dispatch[lov->lo_type];
new_ops = &lov_dispatch[llt];
rc = cl_object_prune(env, &lov->lo_cl);
if (rc != 0)
GOTO(out, rc);
rc = old_ops->llo_delete(env, lov, &lov->u);
if (rc != 0)
GOTO(out, rc);
old_ops->llo_fini(env, lov, &lov->u);
LASSERT(atomic_read(&lov->lo_active_ios) == 0);
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);
RETURN(rc);
}
/**
* Lov object operations.
*/
static int lov_object_init(const struct lu_env *env, struct lu_object *obj,
const struct lu_object_conf *conf)
{
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;
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), 0);
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,
const struct cl_object_conf *conf)
{
struct lov_stripe_md *lsm = NULL;
struct lov_object *lov = cl2lov(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);
}
if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
set_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
GOTO(out_lsm, result = 0);
}
lov_conf_lock(lov);
if (conf->coc_opc == OBJECT_CONF_WAIT) {
if (test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags) &&
atomic_read(&lov->lo_active_ios) > 0) {
lov_conf_unlock(lov);
result = lov_layout_wait(env, lov);
lov_conf_lock(lov);
}
GOTO(out, result);
}
LASSERT(conf->coc_opc == OBJECT_CONF_SET);
/*
* don't apply old layouts which can be brought
* if returned w/o ldlm lock.
* XXX: can we rollback in case of recovery?
*/
if (lsm && lov->lo_lsm) {
u32 oldgen = lov->lo_lsm->lsm_layout_gen &= ~LU_LAYOUT_RESYNC;
u32 newgen = lsm->lsm_layout_gen & ~LU_LAYOUT_RESYNC;
if (newgen < oldgen) {
CDEBUG(D_HA, "skip old for "DFID": %d < %d\n",
PFID(lu_object_fid(lov2lu(lov))),
(int)newgen, (int)oldgen);
if (conf->coc_try) {
set_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
GOTO(out, result = -ERESTARTSYS);
} else {
GOTO(out, result = 0);
}
}
}
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_flags == lsm->lsm_flags) &&
(lov->lo_lsm->lsm_entries[0]->lsme_pattern ==
lsm->lsm_entries[0]->lsme_pattern))) {
/* same version of layout */
clear_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
GOTO(out, result = 0);
}
/* will change layout - check if there still exists active IO. */
if (atomic_read(&lov->lo_active_ios) > 0) {
set_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
GOTO(out, result = -EBUSY);
}
if (conf->coc_try) {
set_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
GOTO(out, result = -ERESTARTSYS);
}
result = lov_layout_change(env, lov, lsm, conf);
if (result)
set_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
else
clear_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
EXIT;
out:
lov_conf_unlock(lov);
out_lsm:
lov_lsm_put(lsm);
CDEBUG(D_INODE, DFID" lo_layout_invalid=%u\n",
PFID(lu_object_fid(lov2lu(lov))),
test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags));
RETURN(result);
}
static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
{
struct lov_object *lov = lu2lov(obj);
ENTRY;
LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
EXIT;
}
static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
{
struct lov_object *lov = lu2lov(obj);
ENTRY;
LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
lu_object_fini(obj);
OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
EXIT;
}
static int lov_object_print(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *o)
{
return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
}
static int lov_page_init(const struct lu_env *env, struct cl_object *obj,
struct cl_page *page, pgoff_t index)
{
return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_page_init, env, obj, page,
index);
}
static int lov_dio_pages_init(const struct lu_env *env, struct cl_object *obj,
struct cl_dio_pages *cdp, pgoff_t index)
{
return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_dio_pages_init, env, obj,
cdp, index);
}
/**
* Implements cl_object_operations::clo_io_init() method for lov
* layer. Dispatches to the appropriate layout io initialization method.
*/
static 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_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 && io->ci_type == CIT_MISC),
env, obj, io);
}
/**
* An implementation of cl_object_operations::clo_attr_get() method for lov
* layer. For raid0 layout this collects and merges attributes of all
* sub-objects.
*/
static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
struct cl_attr *attr)
{
/* do not take lock, as this function is called under a
* spin-lock. Layout is protected from changing by ongoing IO. */
return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
}
static int lov_attr_update(const struct lu_env *env, struct cl_object *obj,
const struct cl_attr *attr, enum cl_attr_valid valid)
{
/*
* No dispatch is required here, as no layout implements this.
*/
return 0;
}
static int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
struct cl_lock *lock, const struct cl_io *io)
{
/* No need to lock because we've taken one refcount of layout. */
return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
io);
}
/**
* 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 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 init_stripe;
int last_stripe;
int i, j;
if (lsme_is_dom(lsme)) {
*stripe_count = 1;
return start_stripe;
}
init_stripe = lov_stripe_number(lsm, index, ext->e_start);
if (ext->e_end - ext->e_start > stripe_width(lsm, index)) {
if (init_stripe <= start_stripe) {
last_stripe = (init_stripe < 1) ?
lsme->lsme_stripe_count - 1 : init_stripe - 1;
*stripe_count = lsme->lsme_stripe_count -
(start_stripe - init_stripe);
} else {
last_stripe = init_stripe - 1;
*stripe_count = init_stripe - start_stripe;
}
} 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, NULL,
NULL))
break;
if ((start_stripe != init_stripe) && (i == init_stripe))
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,
unsigned int ost_index,
unsigned int ext_count,
unsigned int current_extent,
unsigned int abs_stripeno)
{
unsigned int ext;
char *to;
for (ext = 0; ext < ext_count; ext++) {
set_fe_device_stripenr(&lcl_fm_ext[ext], ost_index,
abs_stripeno);
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;
u64 lun_end;
u64 fm_end_offset;
int stripe_no = -1;
if (fiemap->fm_extent_count == 0 ||
fiemap->fm_extents[0].fe_logical == 0)
return 0;
local_end = fiemap->fm_extents[0].fe_logical;
stripe_no = *start_stripe;
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, NULL, &lun_end) &&
local_end < lun_end) {
fm_end_offset = local_end;
} else {
int stripes = lsme_is_dom(lsme) ? 1 : lsme->lsme_stripe_count;
/* This is a special value to indicate that caller should
* calculate offset in next stripe. */
fm_end_offset = 0;
*start_stripe = (stripe_no + 1) % stripes;
}
return fm_end_offset;
}
struct fiemap_state {
struct fiemap *fs_fm;
struct lu_extent fs_ext; /* current entry extent */
u64 fs_length;
u64 fs_end_offset; /* last iteration offset */
int fs_cur_extent; /* collected exts so far */
int fs_cnt_need; /* # of extents buf can hold */
int fs_start_stripe;
int fs_last_stripe;
bool fs_device_done; /* enough for this OST */
bool fs_finish_stripe; /* reached fs_last_stripe */
bool fs_enough; /* enough for this call */
};
static int fiemap_unknown(struct fiemap_state *fs, u64 obd_start, u64 obd_end)
{
/* If OST is inactive or layout is not supported or available
* then return extent with UNKNOWN flag.
*/
fs->fs_fm->fm_mapped_extents = 1;
if (fs->fs_fm->fm_extent_count) {
fs->fs_fm->fm_extents[0].fe_logical = obd_start;
fs->fs_fm->fm_extents[0].fe_length = obd_end - obd_start + 1;
fs->fs_fm->fm_extents[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
}
fs->fs_device_done = true;
return 1;
}
static 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 stripe_last, const int stripeno,
struct fiemap_state *fs)
{
struct lov_object *lo = cl2lov(obj);
struct lov_layout_entry *lle = lov_entry(lo, index);
struct lov_stripe_md_entry *lsme = lle->lle_lsme;
struct cl_object *subobj = NULL;
struct fiemap *fsm = fs->fs_fm;
struct fiemap_extent *fm_ext = &fsm->fm_extents[0];
u64 req_fm_len; /* max requested extent coverage */
u64 len_mapped_single_call;
u64 obd_start;
u64 obd_end;
unsigned int ext_count;
int devnr = 0;
int rc = 0;
/* Find out range of mapping on this stripe */
if ((lov_stripe_intersects(lsm, index, stripeno, &fs->fs_ext,
&obd_start, &obd_end)) == 0)
return 0;
/* If this is a continuation FIEMAP call and we are on
* starting stripe then obd_start needs to be set to
* end_offset */
if (fs->fs_end_offset != 0 && stripeno == fs->fs_start_stripe)
obd_start = fs->fs_end_offset;
if (lov_size_to_stripe(lsm, index, fs->fs_ext.e_end, stripeno) ==
obd_start)
return 0;
fs->fs_device_done = false;
req_fm_len = obd_end - obd_start + 1;
fsm->fm_length = 0;
len_mapped_single_call = 0;
if (lo->lo_type != LLT_COMP || !lle->lle_valid) {
ext_count = fiemap_unknown(fs, obd_start, obd_end);
GOTO(out_unknown, rc = -EOPNOTSUPP);
}
switch (lle->lle_type) {
case LOV_PATTERN_RAID0:
{
struct lov_obd *lov = lu2lov_dev(obj->co_lu.lo_dev)->ld_lov;
struct lu_tgt_descs *ltd = &lov->lov_ost_descs;
const struct lov_layout_raid0 *r0 = &lle->lle_raid0;
struct lov_oinfo *oinfo;
struct lu_tgt_desc *tgt;
if (stripeno >= r0->lo_nr)
RETURN(-EINVAL);
subobj = lovsub2cl(r0->lo_sub[stripeno]);
oinfo = lsme->lsme_oinfo[stripeno];
if (lov_oinfo_is_dummy(oinfo))
RETURN(-EIO);
devnr = oinfo->loi_ost_idx;
if (devnr < 0 || devnr >= ltd->ltd_tgts_size)
RETURN(-EINVAL);
tgt = lov_tgt(lov, devnr);
if (!tgt || !tgt->ltd_active) {
ext_count = fiemap_unknown(fs, obd_start, obd_end);
GOTO(out_unknown, rc = -ENODEV);
}
break;
}
case LOV_PATTERN_MDT:
{
const struct lov_layout_dom *dom = &lle->lle_dom;
subobj = lovsub2cl(dom->lo_dom);
if (lov_oinfo_is_dummy(dom->lo_loi))
RETURN(-EIO);
devnr = dom->lo_mdt_idx | 0x10000ULL;
break;
}
default:
ext_count = fiemap_unknown(fs, obd_start, obd_end);
GOTO(out_unknown, rc = -EOPNOTSUPP);
}
if (!subobj)
RETURN(-EINVAL);
/* If the output buffer is very large and the objects have many
* extents we may need to loop on a single OST repeatedly */
while (!fs->fs_device_done) {
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;
}
obd_start += len_mapped_single_call;
fsm->fm_length = req_fm_len - len_mapped_single_call;
req_fm_len = fsm->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.
*/
fsm->fm_extent_count = fs->fs_enough ? 1 : fs->fs_cnt_need;
fsm->fm_mapped_extents = 0;
fsm->fm_flags = fiemap->fm_flags;
fsm->fm_start = obd_start;
fsm->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
fmkey->lfik_fiemap = *fsm;
*buflen = fiemap_count_to_size(fsm->fm_extent_count);
rc = cl_object_fiemap(env, subobj, fmkey, fsm, buflen);
if (rc) {
/* Can we report as UNKNOWN all subdev error? */
ext_count = fiemap_unknown(fs, obd_start, obd_end);
GOTO(out_unknown, rc);
}
ext_count = fsm->fm_mapped_extents;
if (ext_count == 0) {
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;
RETURN(0);
}
break;
} else if (fs->fs_enough) {
/*
* We've collected enough extents and there are
* more extents after it.
*/
RETURN(0);
}
/* 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 -
obd_start;
/* Have we finished mapping on this device? */
if (req_fm_len <= len_mapped_single_call)
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) {
fs->fs_device_done = true;
}
out_unknown:
fiemap_prepare_and_copy_exts(fiemap, fm_ext, devnr,
ext_count, fs->fs_cur_extent,
stripe_last + stripeno);
fs->fs_cur_extent += ext_count;
/* Ran out of available extents? */
if (fs->fs_cur_extent >= fiemap->fm_extent_count)
fs->fs_enough = true;
}
if (stripeno == fs->fs_last_stripe)
fs->fs_finish_stripe = true;
return 0;
}
/**
* 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;
unsigned int entry;
unsigned int start_entry = ~0U;
unsigned int end_entry;
unsigned int cur_stripe = 0;
unsigned int stripe_count;
unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
int rc = 0;
struct fiemap_state fs = { 0 };
struct lu_extent range;
unsigned int cur_ext;
unsigned int stripe_last = 0;
unsigned int start_stripe = 0;
bool resume = false;
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 = -EOPNOTSUPP);
}
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;
if (fiemap->fm_extent_count == 0)
GOTO(out_lsm, rc = 0);
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);
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 + 1 :
whole_start + fiemap->fm_length;
/**
* If fiemap->fm_length != OBD_OBJECT_EOF but whole_end exceeds file
* size
*/
if (whole_end > fmkey->lfik_oa.o_size + 1)
whole_end = fmkey->lfik_oa.o_size + 1;
/**
* the high 16bits of fe_device remember which stripe the last
* call has been arrived, we'd continue from there in this call.
*/
if (fiemap->fm_extent_count && fiemap->fm_extents[0].fe_logical) {
resume = true;
stripe_last = get_fe_stripenr(&fiemap->fm_extents[0]);
}
/**
* stripe_last records stripe number we've been processed in the last
* call
*/
end_entry = lsm->lsm_entry_count - 1;
cur_stripe = 0;
for (entry = 0; entry <= end_entry; entry++) {
int stripes;
lsme = lsm->lsm_entries[entry];
stripes = lsme_is_dom(lsme) ? 1 : lsme->lsme_stripe_count;
if (cur_stripe + stripes > stripe_last) {
start_entry = entry;
start_stripe = stripe_last - cur_stripe;
break;
}
cur_stripe += stripes;
}
if (start_entry == ~0U) {
CERROR(DFID": FIEMAP does not init start entry, cur_stripe=%u, stripe_last=%u\n",
PFID(lu_object_fid(&obj->co_lu)),
cur_stripe, stripe_last);
GOTO(out_fm_local, rc = -EINVAL);
}
/**
* @start_entry & @start_stripe records the position of fiemap
* resumption @stripe_last keeps recording the absolution position
* we'are processing. @resume indicates we'd honor @start_stripe.
*/
range.e_start = whole_start;
range.e_end = whole_end;
for (entry = start_entry; entry <= end_entry; entry++) {
int stripes;
/* remeber to update stripe_last accordingly */
lsme = lsm->lsm_entries[entry];
stripes = lsme_is_dom(lsme) ? 1 : lsme->lsme_stripe_count;
/* FLR could contain component holes between entries */
if (!lsme_inited(lsme)) {
stripe_last += stripes;
resume = false;
continue;
}
if (!lu_extent_is_overlapped(&range, &lsme->lsme_extent)) {
stripe_last += stripes;
resume = false;
continue;
}
/* prepare for a component entry iteration */
if (lsme->lsme_extent.e_start > whole_start)
fs.fs_ext.e_start = lsme->lsme_extent.e_start;
else
fs.fs_ext.e_start = whole_start;
if (lsme->lsme_extent.e_end > whole_end)
fs.fs_ext.e_end = whole_end;
else
fs.fs_ext.e_end = lsme->lsme_extent.e_end;
/* Calculate start stripe, last stripe and length of mapping */
if (resume) {
fs.fs_start_stripe = start_stripe;
/* put stripe_last to the first stripe of the comp */
stripe_last -= start_stripe;
resume = false;
} else {
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);
/**
* A new mirror component is under process, reset
* fs.fs_end_offset and then fiemap_for_stripe() starts from
* the overlapping extent, otherwise starts from
* fs.fs_end_offset.
*/
if (entry > start_entry && lsme->lsme_extent.e_start == 0) {
/* new mirror */
fs.fs_end_offset = 0;
} else {
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) % stripes) {
/* reset fs_finish_stripe */
fs.fs_finish_stripe = false;
rc = fiemap_for_stripe(env, obj, lsm, fiemap, buflen,
fmkey, entry, stripe_last,
cur_stripe, &fs);
if (rc < 0)
GOTO(out_fm_local, rc);
if (fs.fs_enough) {
stripe_last += cur_stripe;
GOTO(finish, rc);
}
if (fs.fs_finish_stripe)
break;
} /* for each stripe */
stripe_last += stripes;
} /* for covering layout component entry */
finish:
if (fs.fs_cur_extent > 0)
cur_ext = fs.fs_cur_extent - 1;
else
cur_ext = 0;
/* 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;
/* done all the processing */
if (entry > end_entry ||
(fs.fs_enough && fs.fs_finish_stripe && entry == end_entry))
fiemap->fm_extents[cur_ext].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, size_t size)
{
struct lov_object *lov = cl2lov(obj);
struct lov_stripe_md *lsm;
int rc = 0;
ENTRY;
lsm = lov_lsm_addref(lov);
if (lsm == NULL)
RETURN(-ENODATA);
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_is_rdonly = lsm->lsm_is_rdonly;
cl->cl_is_released = lsm->lsm_is_released;
cl->cl_is_composite = lsm_is_composite(lsm->lsm_magic);
rc = lov_lsm_pack(lsm, buf->lb_buf, buf->lb_len);
lov_lsm_put(lsm);
/* return error or number of bytes */
RETURN(rc);
}
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_MAYLOCK(cl2lov(obj), llo_flush, true, env, obj,
lock);
}
static const struct cl_object_operations lov_ops = {
.coo_page_init = lov_page_init,
.coo_dio_pages_init = lov_dio_pages_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 = {
.loo_object_init = lov_object_init,
.loo_object_delete = lov_object_delete,
.loo_object_release = NULL,
.loo_object_free = lov_object_free,
.loo_object_print = lov_object_print,
.loo_object_invariant = NULL,
};
struct lu_object *lov_object_alloc(const struct lu_env *env,
const struct lu_object_header *unused,
struct lu_device *dev)
{
struct lov_object *lov;
struct lu_object *obj;
ENTRY;
OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, GFP_NOFS);
if (lov != NULL) {
obj = lov2lu(lov);
lu_object_init(obj, NULL, dev);
lov->lo_cl.co_ops = &lov_ops;
lov->lo_type = -1; /* invalid, to catch uninitialized type */
/*
* object io operation vector (cl_object::co_iop) is installed
* later in lov_object_init(), as different vectors are used
* for object with different layouts.
*/
obj->lo_ops = &lov_lu_obj_ops;
} else
obj = NULL;
RETURN(obj);
}
static struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
{
struct lov_stripe_md *lsm = NULL;
lov_conf_freeze(lov);
if (lov->lo_lsm != NULL) {
lsm = lsm_addref(lov->lo_lsm);
CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
lsm, kref_read(&lsm->lsm_refc),
test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags),
current);
}
lov_conf_thaw(lov);
return lsm;
}
int lov_read_and_clear_async_rc(struct cl_object *clob)
{
struct lu_object *luobj;
int rc = 0;
ENTRY;
luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
&lov_device_type);
if (luobj != NULL) {
struct lov_object *lov = lu2lov(luobj);
lov_conf_freeze(lov);
switch (lov->lo_type) {
case LLT_COMP: {
struct lov_stripe_md *lsm;
int i;
lsm = lov->lo_lsm;
LASSERT(lsm != NULL);
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) ||
!lov_pattern_supported(lse->lsme_pattern) ||
!lov_supported_comp_magic(lse->lsme_magic))
break;
if (lsme_is_foreign(lse))
break;
for (j = 0; j < lse->lsme_stripe_count; j++) {
struct lov_oinfo *loi =
lse->lsme_oinfo[j];
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;
}
}
}
fallthrough;
case LLT_RELEASED:
case LLT_EMPTY:
case LLT_FOREIGN:
break;
default:
LBUG();
}
lov_conf_thaw(lov);
}
RETURN(rc);
}
EXPORT_SYMBOL(lov_read_and_clear_async_rc);
/** @} lov */
