/**
* Lock upcall function that is executed either when a reply to ENQUEUE rpc is
* received from a server, or after osc_enqueue_base() matched a local DLM
* lock.
*/
static int osc_lock_upcall(void *cookie, struct lustre_handle *lockh,
int errcode)
{
struct osc_lock *oscl = cookie;
struct cl_lock_slice *slice = &oscl->ols_cl;
struct lu_env *env;
int rc;
ENTRY;
env = cl_env_percpu_get();
/* should never happen, similar to osc_ldlm_blocking_ast(). */
LASSERT(!IS_ERR(env));
rc = ldlm_error2errno(errcode);
if (oscl->ols_state == OLS_ENQUEUED) {
oscl->ols_state = OLS_UPCALL_RECEIVED;
} else if (oscl->ols_state == OLS_CANCELLED) {
rc = -EIO;
} else {
CERROR("Impossible state: %d\n", oscl->ols_state);
LBUG();
}
if (rc == 0)
osc_lock_granted(env, oscl, lockh, errcode == ELDLM_OK);
/* Error handling, some errors are tolerable. */
if (oscl->ols_locklessable && rc == -EUSERS) {
/* This is a tolerable error, turn this lock into
* lockless lock.
*/
osc_object_set_contended(cl2osc(slice->cls_obj));
LASSERT(slice->cls_ops != oscl->ols_lockless_ops);
/* Change this lock to ldlmlock-less lock. */
osc_lock_to_lockless(env, oscl, 1);
oscl->ols_state = OLS_GRANTED;
rc = 0;
} else if (oscl->ols_glimpse && rc == -ENAVAIL) {
LASSERT(oscl->ols_flags & LDLM_FL_LVB_READY);
osc_lock_lvb_update(env, cl2osc(slice->cls_obj),
NULL, &oscl->ols_lvb);
/* Hide the error. */
rc = 0;
} else if (rc < 0 && oscl->ols_flags & LDLM_FL_NDELAY) {
rc = -EWOULDBLOCK;
}
if (oscl->ols_owner != NULL)
cl_sync_io_note(env, oscl->ols_owner, rc);
cl_env_percpu_put(env);
RETURN(rc);
}
static int osc_io_ladvise_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
int result = 0;
struct cl_io *io = slice->cis_io;
struct osc_io *oio = cl2osc_io(env, slice);
struct cl_object *obj = slice->cis_obj;
struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
struct cl_ladvise_io *lio = &io->u.ci_ladvise;
struct obdo *oa = &oio->oi_oa;
struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
struct lu_ladvise *ladvise;
struct ladvise_hdr *ladvise_hdr;
int buf_size;
int num_advise = 1;
ENTRY;
/* TODO: add multiple ladvise support in CLIO */
buf_size = offsetof(typeof(*ladvise_hdr), lah_advise[num_advise]);
if (osc_env_info(env)->oti_ladvise_buf.lb_len < buf_size)
lu_buf_realloc(&osc_env_info(env)->oti_ladvise_buf, buf_size);
ladvise_hdr = osc_env_info(env)->oti_ladvise_buf.lb_buf;
if (ladvise_hdr == NULL)
RETURN(-ENOMEM);
memset(ladvise_hdr, 0, buf_size);
ladvise_hdr->lah_magic = LADVISE_MAGIC;
ladvise_hdr->lah_count = num_advise;
ladvise_hdr->lah_flags = lio->li_flags;
memset(oa, 0, sizeof(*oa));
oa->o_oi = loi->loi_oi;
oa->o_valid = OBD_MD_FLID;
obdo_set_parent_fid(oa, lio->li_fid);
ladvise = ladvise_hdr->lah_advise;
ladvise->lla_start = lio->li_start;
ladvise->lla_end = lio->li_end;
ladvise->lla_advice = lio->li_advice;
if (lio->li_flags & LF_ASYNC) {
result = osc_ladvise_base(osc_export(cl2osc(obj)), oa,
ladvise_hdr, NULL, NULL, NULL);
} else {
init_completion(&cbargs->opc_sync);
result = osc_ladvise_base(osc_export(cl2osc(obj)), oa,
ladvise_hdr, osc_async_upcall,
cbargs, PTLRPCD_SET);
cbargs->opc_rpc_sent = result == 0;
}
RETURN(result);
}
static int osc_io_read_ahead(const struct lu_env *env,
const struct cl_io_slice *ios,
pgoff_t start, struct cl_read_ahead *ra)
{
struct osc_object *osc = cl2osc(ios->cis_obj);
struct ldlm_lock *dlmlock;
int result = -ENODATA;
ENTRY;
dlmlock = osc_dlmlock_at_pgoff(env, osc, start, 0);
if (dlmlock != NULL) {
if (dlmlock->l_req_mode != LCK_PR) {
struct lustre_handle lockh;
ldlm_lock2handle(dlmlock, &lockh);
ldlm_lock_addref(&lockh, LCK_PR);
ldlm_lock_decref(&lockh, dlmlock->l_req_mode);
}
ra->cra_end = cl_index(osc2cl(osc),
dlmlock->l_policy_data.l_extent.end);
ra->cra_release = osc_read_ahead_release;
ra->cra_cbdata = dlmlock;
result = 0;
}
RETURN(result);
}
static void osc_page_touch_at(const struct lu_env *env,
struct cl_object *obj, pgoff_t idx, unsigned to)
{
struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
int valid;
__u64 kms;
/* offset within stripe */
kms = cl_offset(obj, idx) + to;
cl_object_attr_lock(obj);
/*
* XXX old code used
*
* ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm);
*
* here
*/
CDEBUG(D_INODE, "stripe KMS %sincreasing %llu->%llu %llu\n",
kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
loi->loi_lvb.lvb_size);
valid = 0;
if (kms > loi->loi_kms) {
attr->cat_kms = kms;
valid |= CAT_KMS;
}
if (kms > loi->loi_lvb.lvb_size) {
attr->cat_size = kms;
valid |= CAT_SIZE;
}
cl_object_attr_set(env, obj, attr, valid);
cl_object_attr_unlock(obj);
}
static int osc_io_commit_write(const struct lu_env *env,
const struct cl_io_slice *ios,
const struct cl_page_slice *slice,
unsigned from, unsigned to)
{
struct osc_io *oio = cl2osc_io(env, ios);
struct osc_page *opg = cl2osc_page(slice);
struct osc_object *obj = cl2osc(opg->ops_cl.cpl_obj);
struct osc_async_page *oap = &opg->ops_oap;
LASSERT(to > 0);
/*
* XXX instead of calling osc_page_touch() here and in
* osc_io_fault_start() it might be more logical to introduce
* cl_page_touch() method, that generic cl_io_commit_write() and page
* fault code calls.
*/
osc_page_touch(env, cl2osc_page(slice), to);
if (!client_is_remote(osc_export(obj)) &&
capable(CFS_CAP_SYS_RESOURCE))
oap->oap_brw_flags |= OBD_BRW_NOQUOTA;
if (oio->oi_lockless)
/* see osc_io_prepare_write() for lockless io handling. */
cl_page_clip(env, slice->cpl_page, from, to);
return 0;
}
static void osc_io_setattr_end(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct cl_io *io = slice->cis_io;
struct osc_io *oio = cl2osc_io(env, slice);
struct cl_object *obj = slice->cis_obj;
struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
int result = 0;
if (cbargs->opc_rpc_sent) {
wait_for_completion(&cbargs->opc_sync);
result = io->ci_result = cbargs->opc_rc;
}
if (result == 0) {
if (oio->oi_lockless) {
/* lockless truncate */
struct osc_device *osd = lu2osc_dev(obj->co_lu.lo_dev);
LASSERT(cl_io_is_trunc(io));
/* XXX: Need a lock. */
osd->od_stats.os_lockless_truncates++;
}
}
if (cl_io_is_trunc(io)) {
__u64 size = io->u.ci_setattr.sa_attr.lvb_size;
osc_trunc_check(env, io, oio, size);
if (oio->oi_trunc != NULL) {
osc_cache_truncate_end(env, oio, cl2osc(obj));
oio->oi_trunc = NULL;
}
}
}
/**
* Updates object attributes from a lock value block (lvb) received together
* with the DLM lock reply from the server. Copy of osc_update_enqueue()
* logic.
*
* This can be optimized to not update attributes when lock is a result of a
* local match.
*
* Called under lock and resource spin-locks.
*/
static void osc_lock_lvb_update(const struct lu_env *env, struct osc_lock *olck,
int rc)
{
struct ost_lvb *lvb;
struct cl_object *obj;
struct lov_oinfo *oinfo;
struct cl_attr *attr;
unsigned valid;
if (!(olck->ols_flags & LDLM_FL_LVB_READY))
return;
lvb = &olck->ols_lvb;
obj = olck->ols_cl.cls_obj;
oinfo = cl2osc(obj)->oo_oinfo;
attr = &osc_env_info(env)->oti_attr;
valid = CAT_BLOCKS | CAT_ATIME | CAT_CTIME | CAT_MTIME | CAT_SIZE;
cl_lvb2attr(attr, lvb);
cl_object_attr_lock(obj);
if (rc == 0) {
struct ldlm_lock *dlmlock;
__u64 size;
dlmlock = olck->ols_lock;
LASSERT(dlmlock != NULL);
/* re-grab LVB from a dlm lock under DLM spin-locks. */
*lvb = *(struct ost_lvb *)dlmlock->l_lvb_data;
size = lvb->lvb_size;
/* Extend KMS up to the end of this lock and no further
* A lock on [x,y] means a KMS of up to y + 1 bytes! */
if (size > dlmlock->l_policy_data.l_extent.end)
size = dlmlock->l_policy_data.l_extent.end + 1;
if (size >= oinfo->loi_kms) {
LDLM_DEBUG(dlmlock, "lock acquired, setting rss="LPU64
", kms="LPU64, lvb->lvb_size, size);
valid |= CAT_KMS;
attr->cat_kms = size;
} else {
LDLM_DEBUG(dlmlock, "lock acquired, setting rss="
LPU64"; leaving kms="LPU64", end="LPU64,
lvb->lvb_size, oinfo->loi_kms,
dlmlock->l_policy_data.l_extent.end);
}
ldlm_lock_allow_match_locked(dlmlock);
} else if (rc == -ENAVAIL && olck->ols_glimpse) {
CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
" kms="LPU64"\n", lvb->lvb_size, oinfo->loi_kms);
} else
valid = 0;
if (valid != 0)
cl_object_attr_set(env, obj, attr, valid);
cl_object_attr_unlock(obj);
}
static int osc_attr_get(const struct lu_env *env, struct cl_object *obj,
struct cl_attr *attr)
{
struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
cl_lvb2attr(attr, &oinfo->loi_lvb);
attr->cat_kms = oinfo->loi_kms_valid ? oinfo->loi_kms : 0;
return 0;
}
static int osc_object_glimpse(const struct lu_env *env,
const struct cl_object *obj, struct ost_lvb *lvb)
{
struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
lvb->lvb_size = oinfo->loi_kms;
lvb->lvb_blocks = oinfo->loi_lvb.lvb_blocks;
return 0;
}
static void osc_lock_granted(const struct lu_env *env, struct osc_lock *oscl,
struct lustre_handle *lockh, bool lvb_update)
{
struct ldlm_lock *dlmlock;
dlmlock = ldlm_handle2lock_long(lockh, 0);
LASSERT(dlmlock);
/* lock reference taken by ldlm_handle2lock_long() is
* owned by osc_lock and released in osc_lock_detach()
*/
lu_ref_add(&dlmlock->l_reference, "osc_lock", oscl);
oscl->ols_has_ref = 1;
LASSERT(!oscl->ols_dlmlock);
oscl->ols_dlmlock = dlmlock;
/* This may be a matched lock for glimpse request, do not hold
* lock reference in that case.
*/
if (!oscl->ols_glimpse) {
/* hold a refc for non glimpse lock which will
* be released in osc_lock_cancel()
*/
lustre_handle_copy(&oscl->ols_handle, lockh);
ldlm_lock_addref(lockh, oscl->ols_einfo.ei_mode);
oscl->ols_hold = 1;
}
/* Lock must have been granted. */
lock_res_and_lock(dlmlock);
if (dlmlock->l_granted_mode == dlmlock->l_req_mode) {
struct ldlm_extent *ext = &dlmlock->l_policy_data.l_extent;
struct cl_lock_descr *descr = &oscl->ols_cl.cls_lock->cll_descr;
/* extend the lock extent, otherwise it will have problem when
* we decide whether to grant a lockless lock.
*/
descr->cld_mode = osc_ldlm2cl_lock(dlmlock->l_granted_mode);
descr->cld_start = cl_index(descr->cld_obj, ext->start);
descr->cld_end = cl_index(descr->cld_obj, ext->end);
descr->cld_gid = ext->gid;
/* no lvb update for matched lock */
if (lvb_update) {
LASSERT(oscl->ols_flags & LDLM_FL_LVB_READY);
osc_lock_lvb_update(env, cl2osc(oscl->ols_cl.cls_obj),
dlmlock, NULL);
}
LINVRNT(osc_lock_invariant(oscl));
}
unlock_res_and_lock(dlmlock);
LASSERT(oscl->ols_state != OLS_GRANTED);
oscl->ols_state = OLS_GRANTED;
}
/**
* Helper for osc_dlm_blocking_ast() handling discrepancies between cl_lock
* and ldlm_lock caches.
*/
static int mdc_dlm_blocking_ast0(const struct lu_env *env,
struct ldlm_lock *dlmlock,
void *data, int flag)
{
struct cl_object *obj = NULL;
int result = 0;
bool discard;
enum cl_lock_mode mode = CLM_READ;
ENTRY;
LASSERT(flag == LDLM_CB_CANCELING);
LASSERT(dlmlock != NULL);
lock_res_and_lock(dlmlock);
if (dlmlock->l_granted_mode != dlmlock->l_req_mode) {
dlmlock->l_ast_data = NULL;
unlock_res_and_lock(dlmlock);
RETURN(0);
}
discard = ldlm_is_discard_data(dlmlock);
if (dlmlock->l_granted_mode & (LCK_PW | LCK_GROUP))
mode = CLM_WRITE;
if (dlmlock->l_ast_data != NULL) {
obj = osc2cl(dlmlock->l_ast_data);
dlmlock->l_ast_data = NULL;
cl_object_get(obj);
}
ldlm_set_kms_ignore(dlmlock);
unlock_res_and_lock(dlmlock);
/* if l_ast_data is NULL, the dlmlock was enqueued by AGL or
* the object has been destroyed. */
if (obj != NULL) {
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
/* Destroy pages covered by the extent of the DLM lock */
result = mdc_lock_flush(env, cl2osc(obj), cl_index(obj, 0),
CL_PAGE_EOF, mode, discard);
/* Losing a lock, set KMS to 0.
* NB: assumed that DOM lock covers whole data on MDT.
*/
/* losing a lock, update kms */
lock_res_and_lock(dlmlock);
cl_object_attr_lock(obj);
attr->cat_kms = 0;
cl_object_attr_update(env, obj, attr, CAT_KMS);
cl_object_attr_unlock(obj);
unlock_res_and_lock(dlmlock);
cl_object_put(env, obj);
}
RETURN(result);
}
static void osc_io_rw_iter_fini(const struct lu_env *env,
const struct cl_io_slice *ios)
{
struct osc_io *oio = osc_env_io(env);
struct osc_object *osc = cl2osc(ios->cis_obj);
struct client_obd *cli = osc_cli(osc);
if (oio->oi_lru_reserved > 0) {
atomic_add(oio->oi_lru_reserved, cli->cl_lru_left);
oio->oi_lru_reserved = 0;
}
}
static int osc_object_prune(const struct lu_env *env, struct cl_object *obj)
{
struct osc_object *osc = cl2osc(obj);
struct ldlm_res_id *resname = &osc_env_info(env)->oti_resname;
/* DLM locks don't hold a reference of osc_object so we have to
* clear it before the object is being destroyed. */
ostid_build_res_name(&osc->oo_oinfo->loi_oi, resname);
ldlm_resource_iterate(osc_export(osc)->exp_obd->obd_namespace, resname,
osc_object_ast_clear, osc);
return 0;
}
static int osc_io_data_version_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct cl_data_version_io *dv = &slice->cis_io->u.ci_data_version;
struct osc_io *oio = cl2osc_io(env, slice);
struct obdo *oa = &oio->oi_oa;
struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
struct osc_object *obj = cl2osc(slice->cis_obj);
struct lov_oinfo *loi = obj->oo_oinfo;
struct obd_export *exp = osc_export(obj);
struct ptlrpc_request *req;
struct ost_body *body;
struct osc_data_version_args *dva;
int rc;
ENTRY;
memset(oa, 0, sizeof(*oa));
oa->o_oi = loi->loi_oi;
oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
if (dv->dv_flags & (LL_DV_RD_FLUSH | LL_DV_WR_FLUSH)) {
oa->o_valid |= OBD_MD_FLFLAGS;
oa->o_flags |= OBD_FL_SRVLOCK;
if (dv->dv_flags & LL_DV_WR_FLUSH)
oa->o_flags |= OBD_FL_FLUSH;
}
init_completion(&cbargs->opc_sync);
req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
if (req == NULL)
RETURN(-ENOMEM);
rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
if (rc < 0) {
ptlrpc_request_free(req);
RETURN(rc);
}
body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
ptlrpc_request_set_replen(req);
req->rq_interpret_reply = osc_data_version_interpret;
CLASSERT(sizeof(*dva) <= sizeof(req->rq_async_args));
dva = ptlrpc_req_async_args(req);
dva->dva_oio = oio;
ptlrpcd_add_req(req);
RETURN(0);
}
static void osc_io_write_iter_fini(const struct lu_env *env,
const struct cl_io_slice *ios)
{
struct osc_io *oio = osc_env_io(env);
struct osc_object *osc = cl2osc(ios->cis_obj);
if (oio->oi_lru_reserved > 0) {
osc_lru_unreserve(osc_cli(osc), oio->oi_lru_reserved);
oio->oi_lru_reserved = 0;
}
oio->oi_write_osclock = NULL;
osc_io_iter_fini(env, ios);
}
static void osc_io_iter_fini(const struct lu_env *env,
const struct cl_io_slice *ios)
{
struct osc_io *oio = osc_env_io(env);
if (oio->oi_is_active) {
struct osc_object *osc = cl2osc(ios->cis_obj);
oio->oi_is_active = 0;
LASSERT(atomic_read(&osc->oo_nr_ios) > 0);
if (atomic_dec_and_test(&osc->oo_nr_ios))
wake_up_all(&osc->oo_io_waitq);
}
}
static int osc_object_prune(const struct lu_env *env, struct cl_object *obj)
{
struct osc_object *osc = cl2osc(obj);
struct ldlm_res_id *resname = &osc_env_info(env)->oti_resname;
LASSERTF(osc->oo_npages == 0,
DFID "still have %lu pages, obj: %p, osc: %p\n",
PFID(lu_object_fid(&obj->co_lu)), osc->oo_npages, obj, osc);
/* DLM locks don't hold a reference of osc_object so we have to
* clear it before the object is being destroyed. */
ostid_build_res_name(&osc->oo_oinfo->loi_oi, resname);
ldlm_resource_iterate(osc_export(osc)->exp_obd->obd_namespace, resname,
osc_object_ast_clear, osc);
return 0;
}
void mdc_lock_lockless_cancel(const struct lu_env *env,
const struct cl_lock_slice *slice)
{
struct osc_lock *ols = cl2osc_lock(slice);
struct osc_object *osc = cl2osc(slice->cls_obj);
struct cl_lock_descr *descr = &slice->cls_lock->cll_descr;
int rc;
LASSERT(ols->ols_dlmlock == NULL);
rc = mdc_lock_flush(env, osc, descr->cld_start, descr->cld_end,
descr->cld_mode, 0);
if (rc != 0)
CERROR("Pages for lockless lock %p were not purged(%d)\n",
ols, rc);
osc_lock_wake_waiters(env, osc, ols);
}
static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
struct osc_io *oio, __u64 size)
{
struct cl_object *clob;
int partial;
pgoff_t start;
clob = oio->oi_cl.cis_obj;
start = cl_index(clob, size);
partial = cl_offset(clob, start) < size;
/*
* Complain if there are pages in the truncated region.
*/
osc_page_gang_lookup(env, io, cl2osc(clob),
start + partial, CL_PAGE_EOF,
trunc_check_cb, (void *)&size);
}
static int osc_io_iter_init(const struct lu_env *env,
const struct cl_io_slice *ios)
{
struct osc_object *osc = cl2osc(ios->cis_obj);
struct obd_import *imp = osc_cli(osc)->cl_import;
int rc = -EIO;
spin_lock(&imp->imp_lock);
if (likely(!imp->imp_invalid)) {
struct osc_io *oio = osc_env_io(env);
atomic_inc(&osc->oo_nr_ios);
oio->oi_is_active = 1;
rc = 0;
}
spin_unlock(&imp->imp_lock);
return rc;
}
/**
* Find any ldlm lock covers the osc object.
* \retval 0 not found
* \retval 1 find one
* \retval < 0 error
*/
static int osc_object_find_cbdata(const struct lu_env *env,
struct cl_object *obj, ldlm_iterator_t iter,
void *data)
{
struct ldlm_res_id res_id;
struct obd_device *obd;
int rc = 0;
ostid_build_res_name(&cl2osc(obj)->oo_oinfo->loi_oi, &res_id);
obd = obj->co_lu.lo_dev->ld_obd;
rc = ldlm_resource_iterate(obd->obd_namespace, &res_id, iter, data);
if (rc == LDLM_ITER_STOP)
return 1;
if (rc == LDLM_ITER_CONTINUE)
return 0;
return rc;
}
/**
* Breaks a link between osc_lock and dlm_lock.
*/
static void osc_lock_detach(const struct lu_env *env, struct osc_lock *olck)
{
struct ldlm_lock *dlmlock;
spin_lock(&osc_ast_guard);
dlmlock = olck->ols_lock;
if (dlmlock == NULL) {
spin_unlock(&osc_ast_guard);
return;
}
olck->ols_lock = NULL;
/* wb(); --- for all who checks (ols->ols_lock != NULL) before
* call to osc_lock_detach() */
dlmlock->l_ast_data = NULL;
olck->ols_handle.cookie = 0ULL;
spin_unlock(&osc_ast_guard);
lock_res_and_lock(dlmlock);
if (dlmlock->l_granted_mode == dlmlock->l_req_mode) {
struct cl_object *obj = olck->ols_cl.cls_obj;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
__u64 old_kms;
cl_object_attr_lock(obj);
/* Must get the value under the lock to avoid possible races. */
old_kms = cl2osc(obj)->oo_oinfo->loi_kms;
/* Update the kms. Need to loop all granted locks.
* Not a problem for the client */
attr->cat_kms = ldlm_extent_shift_kms(dlmlock, old_kms);
cl_object_attr_set(env, obj, attr, CAT_KMS);
cl_object_attr_unlock(obj);
}
unlock_res_and_lock(dlmlock);
/* release a reference taken in osc_lock_upcall0(). */
LASSERT(olck->ols_has_ref);
lu_ref_del(&dlmlock->l_reference, "osc_lock", olck);
LDLM_LOCK_RELEASE(dlmlock);
olck->ols_has_ref = 0;
}
static int osc_io_write_iter_init(const struct lu_env *env,
const struct cl_io_slice *ios)
{
struct cl_io *io = ios->cis_io;
struct osc_io *oio = osc_env_io(env);
struct osc_object *osc = cl2osc(ios->cis_obj);
unsigned long npages;
ENTRY;
if (cl_io_is_append(io))
RETURN(osc_io_iter_init(env, ios));
npages = io->u.ci_rw.crw_count >> PAGE_CACHE_SHIFT;
if (io->u.ci_rw.crw_pos & ~PAGE_MASK)
++npages;
oio->oi_lru_reserved = osc_lru_reserve(osc_cli(osc), npages);
RETURN(osc_io_iter_init(env, ios));
}
static void osc_io_fsync_end(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct cl_fsync_io *fio = &slice->cis_io->u.ci_fsync;
struct cl_object *obj = slice->cis_obj;
pgoff_t start = cl_index(obj, fio->fi_start);
pgoff_t end = cl_index(obj, fio->fi_end);
int result = 0;
if (fio->fi_mode == CL_FSYNC_LOCAL) {
result = osc_cache_wait_range(env, cl2osc(obj), start, end);
} else if (fio->fi_mode == CL_FSYNC_ALL) {
struct osc_io *oio = cl2osc_io(env, slice);
struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
wait_for_completion(&cbargs->opc_sync);
if (result == 0)
result = cbargs->opc_rc;
}
slice->cis_io->ci_result = result;
}
static int osc_io_fsync_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct cl_io *io = slice->cis_io;
struct cl_fsync_io *fio = &io->u.ci_fsync;
struct cl_object *obj = slice->cis_obj;
struct osc_object *osc = cl2osc(obj);
pgoff_t start = cl_index(obj, fio->fi_start);
pgoff_t end = cl_index(obj, fio->fi_end);
int result = 0;
ENTRY;
if (fio->fi_end == OBD_OBJECT_EOF)
end = CL_PAGE_EOF;
result = osc_cache_writeback_range(env, osc, start, end, 0,
fio->fi_mode == CL_FSYNC_DISCARD);
if (result > 0) {
fio->fi_nr_written += result;
result = 0;
}
if (fio->fi_mode == CL_FSYNC_ALL) {
int rc;
/* we have to wait for writeback to finish before we can
* send OST_SYNC RPC. This is bad because it causes extents
* to be written osc by osc. However, we usually start
* writeback before CL_FSYNC_ALL so this won't have any real
* problem. */
rc = osc_cache_wait_range(env, osc, start, end);
if (result == 0)
result = rc;
rc = osc_fsync_ost(env, osc, fio);
if (result == 0)
result = rc;
}
RETURN(result);
}
int osc_attr_set(const struct lu_env *env, struct cl_object *obj,
const struct cl_attr *attr, unsigned valid)
{
struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
struct ost_lvb *lvb = &oinfo->loi_lvb;
if (valid & CAT_SIZE)
lvb->lvb_size = attr->cat_size;
if (valid & CAT_MTIME)
lvb->lvb_mtime = attr->cat_mtime;
if (valid & CAT_ATIME)
lvb->lvb_atime = attr->cat_atime;
if (valid & CAT_CTIME)
lvb->lvb_ctime = attr->cat_ctime;
if (valid & CAT_BLOCKS)
lvb->lvb_blocks = attr->cat_blocks;
if (valid & CAT_KMS) {
CDEBUG(D_CACHE, "set kms from %llu to %llu\n",
oinfo->loi_kms, (__u64)attr->cat_kms);
loi_kms_set(oinfo, attr->cat_kms);
}
return 0;
}
static int osc_io_rw_iter_init(const struct lu_env *env,
const struct cl_io_slice *ios)
{
struct cl_io *io = ios->cis_io;
struct osc_io *oio = osc_env_io(env);
struct osc_object *osc = cl2osc(ios->cis_obj);
struct client_obd *cli = osc_cli(osc);
unsigned long c;
unsigned int npages;
unsigned int max_pages;
ENTRY;
if (cl_io_is_append(io))
RETURN(0);
npages = io->u.ci_rw.crw_count >> PAGE_CACHE_SHIFT;
if (io->u.ci_rw.crw_pos & ~CFS_PAGE_MASK)
++npages;
max_pages = cli->cl_max_pages_per_rpc * cli->cl_max_rpcs_in_flight;
if (npages > max_pages)
npages = max_pages;
c = atomic_read(cli->cl_lru_left);
if (c < npages && osc_lru_reclaim(cli) > 0)
c = atomic_read(cli->cl_lru_left);
while (c >= npages) {
if (c == atomic_cmpxchg(cli->cl_lru_left, c, c - npages)) {
oio->oi_lru_reserved = npages;
break;
}
c = atomic_read(cli->cl_lru_left);
}
RETURN(0);
}
/**
* This is called when a page is accessed within file in a way that creates
* new page, if one were missing (i.e., if there were a hole at that place in
* the file, or accessed page is beyond the current file size).
*
* Expand stripe KMS if necessary.
*/
static void osc_page_touch_at(const struct lu_env *env,
struct cl_object *obj, pgoff_t idx, size_t to)
{
struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
int valid;
__u64 kms;
/* offset within stripe */
kms = cl_offset(obj, idx) + to;
cl_object_attr_lock(obj);
/*
* XXX old code used
*
* ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm);
*
* here
*/
CDEBUG(D_INODE, "stripe KMS %sincreasing "LPU64"->"LPU64" "LPU64"\n",
kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
loi->loi_lvb.lvb_size);
attr->cat_mtime = attr->cat_ctime = LTIME_S(CFS_CURRENT_TIME);
valid = CAT_MTIME | CAT_CTIME;
if (kms > loi->loi_kms) {
attr->cat_kms = kms;
valid |= CAT_KMS;
}
if (kms > loi->loi_lvb.lvb_size) {
attr->cat_size = kms;
valid |= CAT_SIZE;
}
cl_object_attr_update(env, obj, attr, valid);
cl_object_attr_unlock(obj);
}
/**
* Implementation of struct cl_object_operations::coo_req_attr_set() for osc
* layer. osc is responsible for struct obdo::o_id and struct obdo::o_seq
* fields.
*/
static void osc_req_attr_set(const struct lu_env *env, struct cl_object *obj,
struct cl_req_attr *attr)
{
struct lov_oinfo *oinfo;
struct obdo *oa;
struct ost_lvb *lvb;
u64 flags = attr->cra_flags;
oinfo = cl2osc(obj)->oo_oinfo;
lvb = &oinfo->loi_lvb;
oa = attr->cra_oa;
if ((flags & OBD_MD_FLMTIME) != 0) {
oa->o_mtime = lvb->lvb_mtime;
oa->o_valid |= OBD_MD_FLMTIME;
}
if ((flags & OBD_MD_FLATIME) != 0) {
oa->o_atime = lvb->lvb_atime;
oa->o_valid |= OBD_MD_FLATIME;
}
if ((flags & OBD_MD_FLCTIME) != 0) {
oa->o_ctime = lvb->lvb_ctime;
oa->o_valid |= OBD_MD_FLCTIME;
}
if (flags & OBD_MD_FLGROUP) {
ostid_set_seq(&oa->o_oi, ostid_seq(&oinfo->loi_oi));
oa->o_valid |= OBD_MD_FLGROUP;
}
if (flags & OBD_MD_FLID) {
ostid_set_id(&oa->o_oi, ostid_id(&oinfo->loi_oi));
oa->o_valid |= OBD_MD_FLID;
}
if (flags & OBD_MD_FLHANDLE) {
struct ldlm_lock *lock;
struct osc_page *opg;
opg = osc_cl_page_osc(attr->cra_page, cl2osc(obj));
lock = osc_dlmlock_at_pgoff(env, cl2osc(obj), osc_index(opg),
OSC_DAP_FL_TEST_LOCK | OSC_DAP_FL_CANCELING);
if (lock == NULL && !opg->ops_srvlock) {
struct ldlm_resource *res;
struct ldlm_res_id *resname;
CL_PAGE_DEBUG(D_ERROR, env, attr->cra_page,
"uncovered page!\n");
resname = &osc_env_info(env)->oti_resname;
ostid_build_res_name(&oinfo->loi_oi, resname);
res = ldlm_resource_get(
osc_export(cl2osc(obj))->exp_obd->obd_namespace,
NULL, resname, LDLM_EXTENT, 0);
ldlm_resource_dump(D_ERROR, res);
libcfs_debug_dumpstack(NULL);
LBUG();
}
/* check for lockless io. */
if (lock != NULL) {
oa->o_handle = lock->l_remote_handle;
oa->o_valid |= OBD_MD_FLHANDLE;
LDLM_LOCK_PUT(lock);
}
}
}
static int osc_object_fiemap(const struct lu_env *env, struct cl_object *obj,
struct ll_fiemap_info_key *fmkey,
struct fiemap *fiemap, size_t *buflen)
{
struct obd_export *exp = osc_export(cl2osc(obj));
struct ldlm_res_id resid;
union ldlm_policy_data policy;
struct lustre_handle lockh;
enum ldlm_mode mode = LCK_MINMODE;
struct ptlrpc_request *req;
struct fiemap *reply;
char *tmp;
int rc;
ENTRY;
fmkey->lfik_oa.o_oi = cl2osc(obj)->oo_oinfo->loi_oi;
if (!(fmkey->lfik_fiemap.fm_flags & FIEMAP_FLAG_SYNC))
goto skip_locking;
policy.l_extent.start = fmkey->lfik_fiemap.fm_start & PAGE_MASK;
if (OBD_OBJECT_EOF - fmkey->lfik_fiemap.fm_length <=
fmkey->lfik_fiemap.fm_start + PAGE_SIZE - 1)
policy.l_extent.end = OBD_OBJECT_EOF;
else
policy.l_extent.end = (fmkey->lfik_fiemap.fm_start +
fmkey->lfik_fiemap.fm_length +
PAGE_SIZE - 1) & PAGE_MASK;
ostid_build_res_name(&fmkey->lfik_oa.o_oi, &resid);
mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
LDLM_FL_BLOCK_GRANTED | LDLM_FL_LVB_READY,
&resid, LDLM_EXTENT, &policy,
LCK_PR | LCK_PW, &lockh, 0);
if (mode) { /* lock is cached on client */
if (mode != LCK_PR) {
ldlm_lock_addref(&lockh, LCK_PR);
ldlm_lock_decref(&lockh, LCK_PW);
}
} else { /* no cached lock, needs acquire lock on server side */
fmkey->lfik_oa.o_valid |= OBD_MD_FLFLAGS;
fmkey->lfik_oa.o_flags |= OBD_FL_SRVLOCK;
}
skip_locking:
req = ptlrpc_request_alloc(class_exp2cliimp(exp),
&RQF_OST_GET_INFO_FIEMAP);
if (req == NULL)
GOTO(drop_lock, rc = -ENOMEM);
req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY, RCL_CLIENT,
sizeof(*fmkey));
req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL, RCL_CLIENT,
*buflen);
req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL, RCL_SERVER,
*buflen);
rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
if (rc != 0) {
ptlrpc_request_free(req);
GOTO(drop_lock, rc);
}
tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
memcpy(tmp, fmkey, sizeof(*fmkey));
tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
memcpy(tmp, fiemap, *buflen);
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
if (rc != 0)
GOTO(fini_req, rc);
reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
if (reply == NULL)
GOTO(fini_req, rc = -EPROTO);
memcpy(fiemap, reply, *buflen);
fini_req:
ptlrpc_req_finished(req);
drop_lock:
if (mode)
ldlm_lock_decref(&lockh, LCK_PR);
RETURN(rc);
}
