/**
* Prepare buffers for write request processing.
*
* This function converts remote buffers from client to local buffers
* and prepares the latter. If there is recovery in progress and required
* object is missing then it can be re-created before write.
*
* \param[in] env execution environment
* \param[in] exp OBD export of client
* \param[in] ofd OFD device
* \param[in] fid FID of object
* \param[in] la object attributes
* \param[in] oa OBDO structure from client
* \param[in] objcount always 1
* \param[in] obj object data
* \param[in] rnb remote buffers
* \param[in] nr_local number of local buffers
* \param[in] lnb local buffers
* \param[in] jobid job ID name
*
* \retval 0 on successful prepare
* \retval negative value on error
*/
static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
struct ofd_device *ofd, const struct lu_fid *fid,
struct lu_attr *la, struct obdo *oa,
int objcount, struct obd_ioobj *obj,
struct niobuf_remote *rnb, int *nr_local,
struct niobuf_local *lnb, char *jobid)
{
struct ofd_object *fo;
int i, j, k, rc = 0, tot_bytes = 0;
ENTRY;
LASSERT(env != NULL);
LASSERT(objcount == 1);
if (unlikely(exp->exp_obd->obd_recovering)) {
u64 seq = fid_seq(fid);
u64 oid = fid_oid(fid);
struct ofd_seq *oseq;
oseq = ofd_seq_load(env, ofd, seq);
if (IS_ERR(oseq)) {
CERROR("%s: Can't find FID Sequence "LPX64": rc = %d\n",
ofd_name(ofd), seq, (int)PTR_ERR(oseq));
GOTO(out, rc = -EINVAL);
}
if (oid > ofd_seq_last_oid(oseq)) {
int sync = 0;
int diff;
mutex_lock(&oseq->os_create_lock);
diff = oid - ofd_seq_last_oid(oseq);
/* Do sync create if the seq is about to used up */
if (fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq)) {
if (unlikely(oid >= IDIF_MAX_OID - 1))
sync = 1;
} else if (fid_seq_is_norm(seq)) {
if (unlikely(oid >=
LUSTRE_DATA_SEQ_MAX_WIDTH - 1))
sync = 1;
} else {
CERROR("%s : invalid o_seq "DOSTID"\n",
ofd_name(ofd), POSTID(&oa->o_oi));
mutex_unlock(&oseq->os_create_lock);
ofd_seq_put(env, oseq);
GOTO(out, rc = -EINVAL);
}
while (diff > 0) {
u64 next_id = ofd_seq_last_oid(oseq) + 1;
int count = ofd_precreate_batch(ofd, diff);
rc = ofd_precreate_objects(env, ofd, next_id,
oseq, count, sync);
if (rc < 0) {
mutex_unlock(&oseq->os_create_lock);
ofd_seq_put(env, oseq);
GOTO(out, rc);
}
diff -= rc;
}
mutex_unlock(&oseq->os_create_lock);
}
ofd_seq_put(env, oseq);
}
fo = ofd_object_find(env, ofd, fid);
if (IS_ERR(fo))
GOTO(out, rc = PTR_ERR(fo));
LASSERT(fo != NULL);
ofd_read_lock(env, fo);
if (!ofd_object_exists(fo)) {
CERROR("%s: BRW to missing obj "DOSTID"\n",
exp->exp_obd->obd_name, POSTID(&obj->ioo_oid));
ofd_read_unlock(env, fo);
ofd_object_put(env, fo);
GOTO(out, rc = -ENOENT);
}
if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
rc = ofd_verify_ff(env, fo, oa);
if (rc != 0) {
ofd_read_unlock(env, fo);
ofd_object_put(env, fo);
GOTO(out, rc);
}
}
/* Process incoming grant info, set OBD_BRW_GRANTED flag and grant some
* space back if possible */
ofd_grant_prepare_write(env, exp, oa, rnb, obj->ioo_bufcnt);
/* parse remote buffers to local buffers and prepare the latter */
*nr_local = 0;
for (i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
rc = dt_bufs_get(env, ofd_object_child(fo),
rnb + i, lnb + j, 1);
if (unlikely(rc < 0))
GOTO(err, rc);
LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
/* correct index for local buffers to continue with */
for (k = 0; k < rc; k++) {
lnb[j+k].lnb_flags = rnb[i].rnb_flags;
if (!(rnb[i].rnb_flags & OBD_BRW_GRANTED))
lnb[j+k].lnb_rc = -ENOSPC;
}
j += rc;
*nr_local += rc;
LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
tot_bytes += rnb[i].rnb_len;
}
LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
rc = dt_write_prep(env, ofd_object_child(fo), lnb, *nr_local);
if (unlikely(rc != 0))
GOTO(err, rc);
ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE, jobid, tot_bytes);
RETURN(0);
err:
dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
ofd_read_unlock(env, fo);
ofd_object_put(env, fo);
/* ofd_grant_prepare_write() was called, so we must commit */
ofd_grant_commit(exp, oa->o_grant_used, rc);
out:
/* let's still process incoming grant information packed in the oa,
* but without enforcing grant since we won't proceed with the write.
* Just like a read request actually. */
ofd_grant_prepare_read(env, exp, oa);
return rc;
}
static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
struct ofd_device *ofd, struct lu_fid *fid,
struct lu_attr *la, struct obdo *oa,
int objcount, struct obd_ioobj *obj,
struct niobuf_remote *rnb, int *nr_local,
struct niobuf_local *lnb, char *jobid)
{
struct ofd_object *fo;
int i, j, k, rc = 0, tot_bytes = 0;
ENTRY;
LASSERT(env != NULL);
LASSERT(objcount == 1);
if (unlikely(exp->exp_obd->obd_recovering)) {
struct ofd_thread_info *info = ofd_info(env);
/* copied from ofd_precreate_object */
/* XXX this should be consolidated to use the same code
* instead of a copy, due to the ongoing risk of bugs. */
memset(&info->fti_attr, 0, sizeof(info->fti_attr));
info->fti_attr.la_valid = LA_TYPE | LA_MODE;
info->fti_attr.la_mode = S_IFREG | S_ISUID | S_ISGID | 0666;
info->fti_attr.la_valid |= LA_ATIME | LA_MTIME | LA_CTIME;
/* Initialize a/c/m time so any client timestamp will always
* be newer and update the inode. ctime = 0 is also handled
* specially in osd_inode_setattr(). See LU-221, LU-1042 */
info->fti_attr.la_atime = 0;
info->fti_attr.la_mtime = 0;
info->fti_attr.la_ctime = 0;
fo = ofd_object_find_or_create(env, ofd, fid, &info->fti_attr);
} else {
fo = ofd_object_find(env, ofd, fid);
}
if (IS_ERR(fo))
GOTO(out, rc = PTR_ERR(fo));
LASSERT(fo != NULL);
ofd_read_lock(env, fo);
if (!ofd_object_exists(fo)) {
CERROR("%s: BRW to missing obj "DOSTID"\n",
exp->exp_obd->obd_name, POSTID(&obj->ioo_oid));
ofd_read_unlock(env, fo);
ofd_object_put(env, fo);
GOTO(out, rc = -ENOENT);
}
/* Process incoming grant info, set OBD_BRW_GRANTED flag and grant some
* space back if possible */
ofd_grant_prepare_write(env, exp, oa, rnb, obj->ioo_bufcnt);
/* parse remote buffers to local buffers and prepare the latter */
*nr_local = 0;
for (i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
rc = dt_bufs_get(env, ofd_object_child(fo),
rnb + i, lnb + j, 1,
ofd_object_capa(env, fo));
if (unlikely(rc < 0))
GOTO(err, rc);
LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
/* correct index for local buffers to continue with */
for (k = 0; k < rc; k++) {
lnb[j+k].lnb_flags = rnb[i].rnb_flags;
if (!(rnb[i].rnb_flags & OBD_BRW_GRANTED))
lnb[j+k].lnb_rc = -ENOSPC;
/* remote client can't break through quota */
if (exp_connect_rmtclient(exp))
lnb[j+k].lnb_flags &= ~OBD_BRW_NOQUOTA;
}
j += rc;
*nr_local += rc;
LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
tot_bytes += rnb[i].rnb_len;
}
LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
rc = dt_write_prep(env, ofd_object_child(fo), lnb, *nr_local);
if (unlikely(rc != 0))
GOTO(err, rc);
ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE, jobid, tot_bytes);
RETURN(0);
err:
dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
ofd_read_unlock(env, fo);
/* ofd_grant_prepare_write() was called, so we must commit */
ofd_grant_commit(env, exp, rc);
out:
/* let's still process incoming grant information packed in the oa,
* but without enforcing grant since we won't proceed with the write.
* Just like a read request actually. */
ofd_grant_prepare_read(env, exp, oa);
return rc;
}
