/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
+ * Copyright (C) 2001-2003 Cluster File Systems, Inc.
* Author Peter Braam <braam@clusterfs.com>
*
* This file is part of Lustre, http://www.lustre.org.
*
*/
-#define EXPORT_SYMTAB
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
#define DEBUG_SUBSYSTEM S_OSC
-#include <linux/version.h>
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/highmem.h>
-#include <linux/lustre_dlm.h>
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
-#include <linux/workqueue.h>
+#ifdef __KERNEL__
+# include <linux/version.h>
+# include <linux/module.h>
+# include <linux/mm.h>
+# include <linux/highmem.h>
+# include <linux/ctype.h>
+# include <linux/init.h>
+# if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
+# include <linux/workqueue.h>
+# include <linux/smp_lock.h>
+# else
+# include <linux/locks.h>
+# endif
+#else /* __KERNEL__ */
+# include <liblustre.h>
#endif
-#include <linux/kp30.h>
-#include <linux/lustre_mds.h> /* for mds_objid */
-#include <linux/obd_ost.h>
-#include <linux/ctype.h>
-#include <linux/init.h>
-#include <linux/lustre_ha.h>
-#include <linux/obd_support.h> /* for OBD_FAIL_CHECK */
-#include <linux/lustre_lite.h> /* for ll_i2info */
-#include <portals/lib-types.h> /* for PTL_MD_MAX_IOV */
-#include <linux/lprocfs_status.h>
-extern struct lprocfs_vars status_var_nm_1[];
-extern struct lprocfs_vars status_class_var[];
+#include <linux/lustre_dlm.h>
+#include <libcfs/kp30.h>
+#include <linux/lustre_net.h>
+#include <linux/lustre_sec.h>
+#include <lustre/lustre_user.h>
+#include <linux/obd_ost.h>
+#include <linux/obd_lov.h>
-int osc_attach(struct obd_device *dev, obd_count len, void *data)
-{
- return lprocfs_reg_obd(dev, status_var_nm_1, dev);
-}
+#ifdef __CYGWIN__
+# include <ctype.h>
+#endif
-int osc_detach(struct obd_device *dev)
-{
- return lprocfs_dereg_obd(dev);
-}
+#include <linux/lustre_ha.h>
+#include <linux/lprocfs_status.h>
+#include <linux/lustre_log.h>
+#include "osc_internal.h"
-/* Pack OSC object metadata for shipment to the MDS. */
-static int osc_packmd(struct lustre_handle *conn, struct lov_mds_md **lmmp,
+/* Pack OSC object metadata for disk storage (LE byte order). */
+static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
struct lov_stripe_md *lsm)
{
int lmm_size;
+ ENTRY;
lmm_size = sizeof(**lmmp);
if (!lmmp)
if (!*lmmp)
RETURN(-ENOMEM);
}
- if (lsm)
- (*lmmp)->lmm_object_id = (lsm->lsm_object_id);
- return lmm_size;
+ if (lsm) {
+ LASSERT(lsm->lsm_object_id);
+ LASSERT(lsm->lsm_object_gr);
+ (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
+ (*lmmp)->lmm_object_gr = cpu_to_le64(lsm->lsm_object_gr);
+ }
+
+ RETURN(lmm_size);
}
-static int osc_unpackmd(struct lustre_handle *conn, struct lov_stripe_md **lsmp,
- struct lov_mds_md *lmm)
+/* Unpack OSC object metadata from disk storage (LE byte order). */
+static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
+ struct lov_mds_md *lmm, int lmm_bytes)
{
int lsm_size;
+ ENTRY;
+
+ if (lmm != NULL) {
+ if (lmm_bytes < sizeof (*lmm)) {
+ CERROR("lov_mds_md too small: %d, need %d\n",
+ lmm_bytes, (int)sizeof(*lmm));
+ RETURN(-EINVAL);
+ }
+ /* XXX LOV_MAGIC etc check? */
- lsm_size = sizeof(**lsmp);
- if (!lsmp)
+ if (lmm->lmm_object_id == 0) {
+ CERROR("lov_mds_md: zero lmm_object_id\n");
+ RETURN(-EINVAL);
+ }
+ }
+
+ lsm_size = lov_stripe_md_size(1);
+ if (lsmp == NULL)
RETURN(lsm_size);
- if (*lsmp && !lmm) {
+ if (*lsmp != NULL && lmm == NULL) {
OBD_FREE(*lsmp, lsm_size);
*lsmp = NULL;
RETURN(0);
}
- if (!*lsmp) {
+ if (*lsmp == NULL) {
OBD_ALLOC(*lsmp, lsm_size);
- if (!*lsmp)
+ if (*lsmp == NULL)
RETURN(-ENOMEM);
+ loi_init((*lsmp)->lsm_oinfo);
+ }
+
+ if (lmm != NULL) {
+ /* XXX zero *lsmp? */
+ (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
+ (*lsmp)->lsm_object_gr = le64_to_cpu (lmm->lmm_object_gr);
+ LASSERT((*lsmp)->lsm_object_id);
+ LASSERT((*lsmp)->lsm_object_gr);
}
- /* XXX endianness */
- if (lmm)
- (*lsmp)->lsm_object_id = (lmm->lmm_object_id);
+ (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
- return lsm_size;
+ RETURN(lsm_size);
}
-static int osc_getattr(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *md)
+static int osc_getattr_interpret(struct ptlrpc_request *req,
+ struct osc_getattr_async_args *aa, int rc)
{
- struct ptlrpc_request *request;
struct ost_body *body;
- int rc, size = sizeof(*body);
ENTRY;
- request = ptlrpc_prep_req(class_conn2cliimp(conn), OST_GETATTR, 1,
- &size, NULL);
- if (!request)
- RETURN(-ENOMEM);
-
- body = lustre_msg_buf(request->rq_reqmsg, 0);
-#warning FIXME: pack only valid fields instead of memcpy, endianness
- memcpy(&body->oa, oa, sizeof(*oa));
+ if (rc != 0)
+ RETURN(rc);
- request->rq_replen = lustre_msg_size(1, &size);
+ body = lustre_swab_repbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
+ if (body) {
+ CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
+ memcpy(aa->aa_oa, &body->oa, sizeof(*aa->aa_oa));
- rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
- if (rc) {
- CERROR("%s failed: rc = %d\n", __FUNCTION__, rc);
- GOTO(out, rc);
+ /* This should really be sent by the OST */
+ aa->aa_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
+ aa->aa_oa->o_valid |= OBD_MD_FLBLKSZ;
+ } else {
+ CERROR("can't unpack ost_body\n");
+ rc = -EPROTO;
+ aa->aa_oa->o_valid = 0;
}
- body = lustre_msg_buf(request->rq_repmsg, 0);
- CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
- if (oa)
- memcpy(oa, &body->oa, sizeof(*oa));
-
- EXIT;
- out:
- ptlrpc_req_finished(request);
- return rc;
+ RETURN(rc);
}
-static int osc_open(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *md)
+static int osc_getattr_async(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *md,
+ struct ptlrpc_request_set *set)
{
struct ptlrpc_request *request;
struct ost_body *body;
- int rc, size = sizeof(*body);
+ int size = sizeof(*body);
+ struct osc_getattr_async_args *aa;
ENTRY;
- request = ptlrpc_prep_req(class_conn2cliimp(conn), OST_OPEN, 1, &size,
- NULL);
+ request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
+ OST_GETATTR, 1, &size, NULL);
if (!request)
RETURN(-ENOMEM);
- body = lustre_msg_buf(request->rq_reqmsg, 0);
-#warning FIXME: pack only valid fields instead of memcpy, endianness
+ body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
memcpy(&body->oa, oa, sizeof(*oa));
request->rq_replen = lustre_msg_size(1, &size);
+ request->rq_interpret_reply = osc_getattr_interpret;
- rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
- if (rc)
- GOTO(out, rc);
-
- body = lustre_msg_buf(request->rq_repmsg, 0);
- CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
- if (oa)
- memcpy(oa, &body->oa, sizeof(*oa));
+ LASSERT (sizeof (*aa) <= sizeof (request->rq_async_args));
+ aa = (struct osc_getattr_async_args *)&request->rq_async_args;
+ aa->aa_oa = oa;
- EXIT;
- out:
- ptlrpc_req_finished(request);
- return rc;
+ ptlrpc_set_add_req (set, request);
+ RETURN (0);
}
-static int osc_close(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *md)
+static int osc_getattr(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *md)
{
struct ptlrpc_request *request;
struct ost_body *body;
int rc, size = sizeof(*body);
ENTRY;
- request = ptlrpc_prep_req(class_conn2cliimp(conn), OST_CLOSE, 1, &size,
- NULL);
+ request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
+ OST_GETATTR, 1, &size, NULL);
if (!request)
RETURN(-ENOMEM);
- body = lustre_msg_buf(request->rq_reqmsg, 0);
-#warning FIXME: pack only valid fields instead of memcpy, endianness
+ body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
memcpy(&body->oa, oa, sizeof(*oa));
request->rq_replen = lustre_msg_size(1, &size);
rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
- if (rc)
+ if (rc) {
+ CERROR("%s failed: rc = %d\n", __FUNCTION__, rc);
GOTO(out, rc);
+ }
+
+ body = lustre_swab_repbuf(request, 0, sizeof (*body),
+ lustre_swab_ost_body);
+ if (body == NULL) {
+ CERROR ("can't unpack ost_body\n");
+ GOTO (out, rc = -EPROTO);
+ }
- body = lustre_msg_buf(request->rq_repmsg, 0);
CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
- if (oa)
- memcpy(oa, &body->oa, sizeof(*oa));
+ memcpy(oa, &body->oa, sizeof(*oa));
+
+ /* This should really be sent by the OST */
+ oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
+ oa->o_valid |= OBD_MD_FLBLKSZ;
EXIT;
out:
return rc;
}
-static int osc_setattr(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *md)
+static int osc_setattr(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *md, struct obd_trans_info *oti)
{
struct ptlrpc_request *request;
struct ost_body *body;
int rc, size = sizeof(*body);
ENTRY;
- request = ptlrpc_prep_req(class_conn2cliimp(conn), OST_SETATTR, 1,
- &size, NULL);
+ LASSERT(!(oa->o_valid & OBD_MD_FLGROUP) || oa->o_gr > 0);
+
+ request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
+ OST_SETATTR, 1, &size, NULL);
if (!request)
- RETURN(-ENOMEM);
+ RETURN(-ENOMEM);
- body = lustre_msg_buf(request->rq_reqmsg, 0);
+ body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof(*body));
memcpy(&body->oa, oa, sizeof(*oa));
request->rq_replen = lustre_msg_size(1, &size);
- rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
+ if (oti != NULL && (oti->oti_flags & OBD_MODE_ASYNC)) {
+ ptlrpcd_add_req(request);
+ rc = 0;
+ } else {
+ rc = ptlrpc_queue_wait(request);
+ if (rc)
+ GOTO(out, rc);
+
+ body = lustre_swab_repbuf(request, 0, sizeof(*body),
+ lustre_swab_ost_body);
+ if (body == NULL)
+ GOTO(out, rc = -EPROTO);
+ memcpy(oa, &body->oa, sizeof(*oa));
+ }
+ EXIT;
+out:
ptlrpc_req_finished(request);
- return rc;
+ RETURN(0);
}
-static int osc_create(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md **ea)
+int osc_real_create(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md **ea, struct obd_trans_info *oti)
{
+ struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
struct ptlrpc_request *request;
struct ost_body *body;
struct lov_stripe_md *lsm;
lsm = *ea;
if (!lsm) {
- rc = obd_alloc_memmd(conn, &lsm);
+ rc = obd_alloc_memmd(exp, &lsm);
if (rc < 0)
RETURN(rc);
}
- request = ptlrpc_prep_req(class_conn2cliimp(conn), OST_CREATE, 1, &size,
- NULL);
+ request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
+ OST_CREATE, 1, &size, NULL);
if (!request)
GOTO(out, rc = -ENOMEM);
- body = lustre_msg_buf(request->rq_reqmsg, 0);
- memcpy(&body->oa, oa, sizeof(*oa));
+ body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
+ memcpy(&body->oa, oa, sizeof(body->oa));
request->rq_replen = lustre_msg_size(1, &size);
+ if (oa->o_valid & OBD_MD_FLINLINE) {
+ LASSERT((oa->o_valid & OBD_MD_FLFLAGS) &&
+ oa->o_flags == OBD_FL_DELORPHAN);
+ DEBUG_REQ(D_HA, request,
+ "delorphan from OST integration");
+ /* Don't resend the delorphan request */
+ request->rq_no_resend = request->rq_no_delay = 1;
+ }
rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
if (rc)
GOTO(out_req, rc);
- body = lustre_msg_buf(request->rq_repmsg, 0);
+ body = lustre_swab_repbuf(request, 0, sizeof(*body),
+ lustre_swab_ost_body);
+ if (body == NULL) {
+ CERROR ("can't unpack ost_body\n");
+ GOTO (out_req, rc = -EPROTO);
+ }
+
+ if ((oa->o_valid & OBD_MD_FLFLAGS) && oa->o_flags == OBD_FL_DELORPHAN) {
+ struct obd_import *imp = class_exp2cliimp(exp);
+ /* MDS declares last known object, OSS responses
+ * with next possible object -bzzz */
+ spin_lock(&oscc->oscc_lock);
+ oscc->oscc_next_id = body->oa.o_id;
+ spin_unlock(&oscc->oscc_lock);
+ CDEBUG(D_HA, "%s: set nextid "LPD64" after recovery\n",
+ imp->imp_target_uuid.uuid, oa->o_id);
+ }
memcpy(oa, &body->oa, sizeof(*oa));
+ /* This should really be sent by the OST */
+ oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
+ oa->o_valid |= OBD_MD_FLBLKSZ;
+
+ /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
+ * have valid lsm_oinfo data structs, so don't go touching that.
+ * This needs to be fixed in a big way.
+ */
lsm->lsm_object_id = oa->o_id;
- lsm->lsm_stripe_count = 0;
+ lsm->lsm_object_gr = oa->o_gr;
*ea = lsm;
+
+ if (oti != NULL) {
+ oti->oti_transno = request->rq_repmsg->transno;
+
+ if (oa->o_valid & OBD_MD_FLCOOKIE) {
+ if (!oti->oti_logcookies)
+ oti_alloc_cookies(oti, 1);
+ memcpy(oti->oti_logcookies, obdo_logcookie(oa),
+ sizeof(oti->oti_onecookie));
+ }
+ }
+
+ CDEBUG(D_HA, "transno: "LPD64"\n", request->rq_repmsg->transno);
EXIT;
out_req:
ptlrpc_req_finished(request);
out:
if (rc && !*ea)
- obd_free_memmd(conn, &lsm);
+ obd_free_memmd(exp, &lsm);
return rc;
}
-static int osc_punch(struct lustre_handle *conn, struct obdo *oa,
+static int osc_punch(struct obd_export *exp, struct obdo *oa,
struct lov_stripe_md *md, obd_size start,
- obd_size end)
+ obd_size end, struct obd_trans_info *oti)
{
struct ptlrpc_request *request;
struct ost_body *body;
RETURN(-EINVAL);
}
- request = ptlrpc_prep_req(class_conn2cliimp(conn), OST_PUNCH, 1, &size,
- NULL);
+ request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
+ OST_PUNCH, 1, &size, NULL);
if (!request)
RETURN(-ENOMEM);
- body = lustre_msg_buf(request->rq_reqmsg, 0);
-#warning FIXME: pack only valid fields instead of memcpy, endianness, valid
+ body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
memcpy(&body->oa, oa, sizeof(*oa));
/* overload the size and blocks fields in the oa with start/end */
- body->oa.o_size = HTON__u64(start);
- body->oa.o_blocks = HTON__u64(end);
- body->oa.o_valid |= HTON__u32(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
+ body->oa.o_size = start;
+ body->oa.o_blocks = end;
+ body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
request->rq_replen = lustre_msg_size(1, &size);
rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
if (rc)
GOTO(out, rc);
- body = lustre_msg_buf(request->rq_repmsg, 0);
+ body = lustre_swab_repbuf (request, 0, sizeof (*body),
+ lustre_swab_ost_body);
+ if (body == NULL) {
+ CERROR ("can't unpack ost_body\n");
+ GOTO (out, rc = -EPROTO);
+ }
+
memcpy(oa, &body->oa, sizeof(*oa));
EXIT;
return rc;
}
-static int osc_destroy(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *ea)
+static int osc_sync(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *md, obd_size start,
+ obd_size end)
{
struct ptlrpc_request *request;
struct ost_body *body;
CERROR("oa NULL\n");
RETURN(-EINVAL);
}
- request = ptlrpc_prep_req(class_conn2cliimp(conn), OST_DESTROY, 1,
- &size, NULL);
+
+ request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
+ OST_SYNC, 1, &size, NULL);
if (!request)
RETURN(-ENOMEM);
- body = lustre_msg_buf(request->rq_reqmsg, 0);
-#warning FIXME: pack only valid fields instead of memcpy, endianness
+ body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
memcpy(&body->oa, oa, sizeof(*oa));
+ /* overload the size and blocks fields in the oa with start/end */
+ body->oa.o_size = start;
+ body->oa.o_blocks = end;
+ body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
+
request->rq_replen = lustre_msg_size(1, &size);
rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
if (rc)
GOTO(out, rc);
- body = lustre_msg_buf(request->rq_repmsg, 0);
+ body = lustre_swab_repbuf(request, 0, sizeof(*body),
+ lustre_swab_ost_body);
+ if (body == NULL) {
+ CERROR ("can't unpack ost_body\n");
+ GOTO (out, rc = -EPROTO);
+ }
+
memcpy(oa, &body->oa, sizeof(*oa));
EXIT;
return rc;
}
-/* Our bulk-unmapping bottom half. */
-static void unmap_and_decref_bulk_desc(void *data)
+static int osc_destroy(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *ea, struct obd_trans_info *oti)
{
- struct ptlrpc_bulk_desc *desc = data;
- struct list_head *tmp;
+ struct ptlrpc_request *request;
+ struct ost_body *body;
+ int rc, size = sizeof(*body);
ENTRY;
- /* This feels wrong to me. */
- list_for_each(tmp, &desc->bd_page_list) {
- struct ptlrpc_bulk_page *bulk;
- bulk = list_entry(tmp, struct ptlrpc_bulk_page, bp_link);
+ if (!oa) {
+ CERROR("oa NULL\n");
+ RETURN(-EINVAL);
+ }
+
+ request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
+ OST_DESTROY, 1, &size, NULL);
+ if (!request)
+ RETURN(-ENOMEM);
+
+ body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
- kunmap(bulk->bp_page);
- obd_kmap_put(1);
+ if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE) {
+ memcpy(obdo_logcookie(oa), oti->oti_logcookies,
+ sizeof(*oti->oti_logcookies));
+ oti->oti_logcookies++;
}
- ptlrpc_bulk_decref(desc);
- EXIT;
+ memcpy(&body->oa, oa, sizeof(*oa));
+ request->rq_replen = lustre_msg_size(1, &size);
+
+ if (oti != NULL && (oti->oti_flags & OBD_MODE_ASYNC)) {
+ ptlrpcd_add_req(request);
+ rc = 0;
+ } else {
+ rc = ptlrpc_queue_wait(request);
+
+ if (rc == -ENOENT)
+ rc = 0;
+
+ if (rc) {
+ ptlrpc_req_finished(request);
+ RETURN(rc);
+ }
+
+ body = lustre_swab_repbuf(request, 0, sizeof(*body),
+ lustre_swab_ost_body);
+ if (body == NULL) {
+ CERROR ("Can't unpack body\n");
+ ptlrpc_req_finished(request);
+ RETURN(-EPROTO);
+ }
+
+ memcpy(oa, &body->oa, sizeof(*oa));
+ ptlrpc_req_finished(request);
+ }
+ RETURN(rc);
}
-/* this is the callback function which is invoked by the Portals
- * event handler associated with the bulk_sink queue and bulk_source queue.
- */
-static void osc_ptl_ev_hdlr(struct ptlrpc_bulk_desc *desc)
+static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
+ long writing_bytes)
{
- ENTRY;
+ obd_valid bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
+
+ LASSERT(!(oa->o_valid & bits));
+
+ oa->o_valid |= bits;
+ spin_lock(&cli->cl_loi_list_lock);
+ oa->o_dirty = cli->cl_dirty;
+ oa->o_undirty = cli->cl_dirty_max - oa->o_dirty;
+ oa->o_grant = cli->cl_avail_grant;
+ oa->o_dropped = cli->cl_lost_grant;
+ cli->cl_lost_grant = 0;
+ spin_unlock(&cli->cl_loi_list_lock);
+ CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
+ oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
+}
+
+/* caller must hold loi_list_lock */
+static void osc_consume_write_grant(struct client_obd *cli,
+ struct osc_async_page *oap)
+{
+ cli->cl_dirty += PAGE_SIZE;
+ cli->cl_avail_grant -= PAGE_SIZE;
+ oap->oap_brw_flags |= OBD_BRW_FROM_GRANT;
+ CDEBUG(D_CACHE, "using %lu grant credits for oap %p\n", PAGE_SIZE, oap);
+ LASSERT(cli->cl_avail_grant >= 0);
+}
+
+static unsigned long rpcs_in_flight(struct client_obd *cli)
+{
+ return cli->cl_r_in_flight + cli->cl_w_in_flight;
+}
- LASSERT(desc->bd_brw_set != NULL);
- LASSERT(desc->bd_brw_set->brw_callback != NULL);
+/* caller must hold loi_list_lock */
+void osc_wake_cache_waiters(struct client_obd *cli)
+{
+ struct list_head *l, *tmp;
+ struct osc_cache_waiter *ocw;
+
+ list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
+ /* if we can't dirty more, we must wait until some is written */
+ if (cli->cl_dirty + PAGE_SIZE > cli->cl_dirty_max) {
+ CDEBUG(D_CACHE, "no dirty room: dirty: %ld max %ld\n",
+ cli->cl_dirty, cli->cl_dirty_max);
+ return;
+ }
- desc->bd_brw_set->brw_callback(desc->bd_brw_set, CB_PHASE_FINISH);
+ /* if still dirty cache but no grant wait for pending RPCs that
+ * may yet return us some grant before doing sync writes */
+ if (cli->cl_w_in_flight && cli->cl_avail_grant < PAGE_SIZE) {
+ CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
+ cli->cl_w_in_flight);
+ }
+ ocw = list_entry(l, struct osc_cache_waiter, ocw_entry);
+ list_del_init(&ocw->ocw_entry);
+ if (cli->cl_avail_grant < PAGE_SIZE) {
+ /* no more RPCs in flight to return grant, do sync IO */
+ ocw->ocw_rc = -EDQUOT;
+ CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
+ } else {
+ osc_consume_write_grant(cli, ocw->ocw_oap);
+ }
- /* We can't kunmap the desc from interrupt context, so we do it from
- * the bottom half above. */
- prepare_work(&desc->bd_queue, unmap_and_decref_bulk_desc, desc);
- schedule_work(&desc->bd_queue);
+ wake_up(&ocw->ocw_waitq);
+ }
EXIT;
}
-static int osc_brw_read(struct lustre_handle *conn, struct lov_stripe_md *lsm,
- obd_count page_count, struct brw_page *pga,
- struct obd_brw_set *set)
+static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
{
- struct ptlrpc_connection *connection =
- client_conn2cli(conn)->cl_import.imp_connection;
- struct ptlrpc_request *request = NULL;
- struct ptlrpc_bulk_desc *desc = NULL;
- struct ost_body *body;
- int rc, size[3] = {sizeof(*body)}, mapped = 0;
- void *iooptr, *nioptr;
- __u32 xid;
- ENTRY;
+ spin_lock(&cli->cl_loi_list_lock);
+ CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
+ cli->cl_avail_grant += body->oa.o_grant;
+ /* waiters are woken in brw_interpret_oap */
+ spin_unlock(&cli->cl_loi_list_lock);
+}
- size[1] = sizeof(struct obd_ioobj);
- size[2] = page_count * sizeof(struct niobuf_remote);
+/* We assume that the reason this OSC got a short read is because it read
+ * beyond the end of a stripe file; i.e. lustre is reading a sparse file
+ * via the LOV, and it _knows_ it's reading inside the file, it's just that
+ * this stripe never got written at or beyond this stripe offset yet. */
+static void handle_short_read(int nob_read, obd_count page_count,
+ struct brw_page *pga)
+{
+ char *ptr;
+
+ /* skip bytes read OK */
+ while (nob_read > 0) {
+ LASSERT (page_count > 0);
+
+ if (pga->count > nob_read) {
+ /* EOF inside this page */
+ ptr = kmap(pga->pg) + (pga->page_offset & ~PAGE_MASK);
+ memset(ptr + nob_read, 0, pga->count - nob_read);
+ kunmap(pga->pg);
+ page_count--;
+ pga++;
+ break;
+ }
- request = ptlrpc_prep_req(class_conn2cliimp(conn), OST_READ, 3, size,
- NULL);
- if (!request)
- RETURN(-ENOMEM);
+ nob_read -= pga->count;
+ page_count--;
+ pga++;
+ }
+
+ /* zero remaining pages */
+ while (page_count-- > 0) {
+ ptr = kmap(pga->pg) + (pga->page_offset & ~PAGE_MASK);
+ memset(ptr, 0, pga->count);
+ kunmap(pga->pg);
+ pga++;
+ }
+}
- body = lustre_msg_buf(request->rq_reqmsg, 0);
+static int check_write_rcs(struct ptlrpc_request *request,
+ int requested_nob, int niocount,
+ obd_count page_count, struct brw_page *pga)
+{
+ int *remote_rcs, i;
+
+ /* return error if any niobuf was in error */
+ remote_rcs = lustre_swab_repbuf(request, 1,
+ sizeof(*remote_rcs) * niocount, NULL);
+ if (remote_rcs == NULL) {
+ CERROR("Missing/short RC vector on BRW_WRITE reply\n");
+ return(-EPROTO);
+ }
+ if (lustre_msg_swabbed(request->rq_repmsg))
+ for (i = 0; i < niocount; i++)
+ __swab32s((__u32 *)&remote_rcs[i]);
+
+ for (i = 0; i < niocount; i++) {
+ if (remote_rcs[i] < 0)
+ return(remote_rcs[i]);
+
+ if (remote_rcs[i] != 0) {
+ CERROR("rc[%d] invalid (%d) req %p\n",
+ i, remote_rcs[i], request);
+ return(-EPROTO);
+ }
+ }
- desc = ptlrpc_prep_bulk(connection);
- if (!desc)
- GOTO(out_req, rc = -ENOMEM);
- desc->bd_portal = OST_BULK_PORTAL;
- desc->bd_ptl_ev_hdlr = osc_ptl_ev_hdlr;
- CDEBUG(D_PAGE, "desc = %p\n", desc);
+ if (request->rq_bulk->bd_nob_transferred != requested_nob) {
+ CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
+ requested_nob, request->rq_bulk->bd_nob_transferred);
+ return(-EPROTO);
+ }
- iooptr = lustre_msg_buf(request->rq_reqmsg, 1);
- nioptr = lustre_msg_buf(request->rq_reqmsg, 2);
- ost_pack_ioo(&iooptr, lsm, page_count);
- /* end almost identical to brw_write case */
+ return (0);
+}
- spin_lock(&connection->c_lock);
- xid = ++connection->c_xid_out; /* single xid for all pages */
- spin_unlock(&connection->c_lock);
+static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
+{
+ if (p1->flag != p2->flag) {
+ unsigned mask = ~OBD_BRW_FROM_GRANT;
+
+ /* warn if we try to combine flags that we don't know to be
+ * safe to combine */
+ if ((p1->flag & mask) != (p2->flag & mask))
+ CERROR("is it ok to have flags 0x%x and 0x%x in the "
+ "same brw?\n", p1->flag, p2->flag);
+ return 0;
+ }
- obd_kmap_get(page_count, 0);
+ return (p1->disk_offset + p1->count == p2->disk_offset);
+}
- for (mapped = 0; mapped < page_count; mapped++) {
- struct ptlrpc_bulk_page *bulk = ptlrpc_prep_bulk_page(desc);
- if (bulk == NULL)
- GOTO(out_unmap, rc = -ENOMEM);
+#if CHECKSUM_BULK
+static obd_count cksum_pages(int nob, obd_count page_count,
+ struct brw_page *pga)
+{
+ obd_count cksum = 0;
+ char *ptr;
- bulk->bp_xid = xid; /* single xid for all pages */
+ while (nob > 0) {
+ LASSERT (page_count > 0);
- bulk->bp_buf = kmap(pga[mapped].pg);
- bulk->bp_page = pga[mapped].pg;
- bulk->bp_buflen = PAGE_SIZE;
- ost_pack_niobuf(&nioptr, pga[mapped].off, pga[mapped].count,
- pga[mapped].flag, bulk->bp_xid);
- }
+ ptr = kmap(pga->pg);
+ ost_checksum(&cksum, ptr + (pga->off & (PAGE_SIZE - 1)),
+ pga->count > nob ? nob : pga->count);
+ kunmap(pga->pg);
- /*
- * Register the bulk first, because the reply could arrive out of order,
- * and we want to be ready for the bulk data.
- *
- * One reference is released when brw_finish is complete, the other when
- * the caller removes us from the "set" list.
- *
- * On error, we never do the brw_finish, so we handle all decrefs.
- */
- if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_READ_BULK)) {
- CERROR("obd_fail_loc=%x, skipping register_bulk\n",
- OBD_FAIL_OSC_BRW_READ_BULK);
- } else {
- rc = ptlrpc_register_bulk(desc);
- if (rc)
- GOTO(out_unmap, rc);
- obd_brw_set_add(set, desc);
+ nob -= pga->count;
+ page_count--;
+ pga++;
}
- request->rq_replen = lustre_msg_size(1, size);
- rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
-
- /*
- * XXX: If there is an error during the processing of the callback,
- * such as a timeout in a sleep that it performs, brw_finish
- * will never get called, and we'll leak the desc, fail to kunmap
- * things, cats will live with dogs. One solution would be to
- * export brw_finish as osc_brw_finish, so that the timeout case
- * and its kin could call it for proper cleanup. An alternative
- * would be for an error return from the callback to cause us to
- * clean up, but that doesn't help the truly async cases (like
- * LOV), which will immediately return from their PHASE_START
- * callback, before any such cleanup-requiring error condition can
- * be detected.
- */
- out_req:
- ptlrpc_req_finished(request);
- RETURN(rc);
-
- /* Clean up on error. */
-out_unmap:
- while (mapped-- > 0)
- kunmap(pga[mapped].pg);
- obd_kmap_put(page_count);
- ptlrpc_bulk_decref(desc);
- goto out_req;
+ return (cksum);
}
+#endif
-static int osc_brw_write(struct lustre_handle *conn, struct lov_stripe_md *md,
- obd_count page_count, struct brw_page *pga,
- struct obd_brw_set *set)
+static int osc_brw_prep_request(int cmd, struct obd_import *imp,struct obdo *oa,
+ struct lov_stripe_md *lsm, obd_count page_count,
+ struct brw_page *pga, int *requested_nobp,
+ int *niocountp, struct ptlrpc_request **reqp)
{
- struct ptlrpc_connection *connection =
- client_conn2cli(conn)->cl_import.imp_connection;
- struct ptlrpc_request *request = NULL;
- struct ptlrpc_bulk_desc *desc = NULL;
- struct ost_body *body;
- struct niobuf_local *local = NULL;
- struct niobuf_remote *remote;
- int rc, j, size[3] = {sizeof(*body)}, mapped = 0;
- void *iooptr, *nioptr;
- ENTRY;
+ struct ptlrpc_request *req;
+ struct ptlrpc_bulk_desc *desc;
+ struct client_obd *cli = &imp->imp_obd->u.cli;
+ struct ost_body *body;
+ struct obd_ioobj *ioobj;
+ struct niobuf_remote *niobuf;
+ int niocount;
+ int size[3];
+ int i;
+ int requested_nob;
+ int opc;
+ int rc;
+
+ opc = ((cmd & OBD_BRW_WRITE) != 0) ? OST_WRITE : OST_READ;
+
+ for (niocount = i = 1; i < page_count; i++)
+ if (!can_merge_pages(&pga[i - 1], &pga[i]))
+ niocount++;
+
+ size[0] = sizeof(*body);
+ size[1] = sizeof(*ioobj);
+ size[2] = niocount * sizeof(*niobuf);
+
+ req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, opc, 3, size, NULL);
+ if (req == NULL)
+ return (-ENOMEM);
+
+ if (opc == OST_WRITE)
+ desc = ptlrpc_prep_bulk_imp (req, page_count,
+ BULK_GET_SOURCE, OST_BULK_PORTAL);
+ else
+ desc = ptlrpc_prep_bulk_imp (req, page_count,
+ BULK_PUT_SINK, OST_BULK_PORTAL);
+ if (desc == NULL)
+ GOTO(out, rc = -ENOMEM);
+ /* NB request now owns desc and will free it when it gets freed */
- size[1] = sizeof(struct obd_ioobj);
- size[2] = page_count * sizeof(*remote);
+ body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
+ ioobj = lustre_msg_buf(req->rq_reqmsg, 1, sizeof(*ioobj));
+ niobuf = lustre_msg_buf(req->rq_reqmsg, 2, niocount * sizeof(*niobuf));
- request = ptlrpc_prep_req(class_conn2cliimp(conn), OST_WRITE, 3, size,
- NULL);
- if (!request)
- RETURN(-ENOMEM);
+ memcpy(&body->oa, oa, sizeof(*oa));
- body = lustre_msg_buf(request->rq_reqmsg, 0);
+ obdo_to_ioobj(oa, ioobj);
+ ioobj->ioo_bufcnt = niocount;
+
+ LASSERT (page_count > 0);
+
+ for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
+ struct brw_page *pg = &pga[i];
+ struct brw_page *pg_prev = pg - 1;
+
+ LASSERT(pg->count > 0);
+ LASSERTF((pg->page_offset & ~PAGE_MASK)+ pg->count <= PAGE_SIZE,
+ "i: %d pg: %p pg_off: "LPU64", count: %u\n", i, pg,
+ pg->page_offset, pg->count);
+ LASSERTF(i == 0 || pg->disk_offset > pg_prev->disk_offset,
+ "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
+ " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
+ i, page_count,
+ pg->pg, pg->pg->private, pg->pg->index, pg->disk_offset,
+ pg_prev->pg, pg_prev->pg->private, pg_prev->pg->index,
+ pg_prev->disk_offset);
+
+ ptlrpc_prep_bulk_page(desc, pg->pg,
+ pg->page_offset & ~PAGE_MASK, pg->count);
+ requested_nob += pg->count;
+
+ if (i > 0 && can_merge_pages(pg_prev, pg)) {
+ niobuf--;
+ niobuf->len += pg->count;
+ } else {
+ niobuf->offset = pg->disk_offset;
+ niobuf->len = pg->count;
+ niobuf->flags = pg->flag;
+ }
+ }
- desc = ptlrpc_prep_bulk(connection);
- if (!desc)
- GOTO(out_req, rc = -ENOMEM);
- desc->bd_portal = OSC_BULK_PORTAL;
- desc->bd_ptl_ev_hdlr = osc_ptl_ev_hdlr;
- CDEBUG(D_PAGE, "desc = %p\n", desc);
+ LASSERT((void *)(niobuf - niocount) ==
+ lustre_msg_buf(req->rq_reqmsg, 2, niocount * sizeof(*niobuf)));
+ osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
- iooptr = lustre_msg_buf(request->rq_reqmsg, 1);
- nioptr = lustre_msg_buf(request->rq_reqmsg, 2);
- ost_pack_ioo(&iooptr, md, page_count);
- /* end almost identical to brw_read case */
+ /* size[0] still sizeof (*body) */
+ if (opc == OST_WRITE) {
+#if CHECKSUM_BULK
+ body->oa.o_valid |= OBD_MD_FLCKSUM;
+ body->oa.o_cksum = cksum_pages(requested_nob, page_count, pga);
+#endif
+ /* 1 RC per niobuf */
+ size[1] = sizeof(__u32) * niocount;
+ req->rq_replen = lustre_msg_size(2, size);
+ } else {
+ /* 1 RC for the whole I/O */
+ req->rq_replen = lustre_msg_size(1, size);
+ }
- OBD_ALLOC(local, page_count * sizeof(*local));
- if (!local)
- GOTO(out_desc, rc = -ENOMEM);
+ *niocountp = niocount;
+ *requested_nobp = requested_nob;
+ *reqp = req;
+ return (0);
- obd_kmap_get(page_count, 0);
+ out:
+ ptlrpc_req_finished (req);
+ return (rc);
+}
- for (mapped = 0; mapped < page_count; mapped++) {
- local[mapped].addr = kmap(pga[mapped].pg);
+static int osc_brw_fini_request(struct ptlrpc_request *req, struct obdo *oa,
+ int requested_nob, int niocount,
+ obd_count page_count, struct brw_page *pga,
+ int rc)
+{
+ struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
+ struct ost_body *body;
+ ENTRY;
- CDEBUG(D_INFO, "kmap(pg) = %p ; pg->flags = %lx ; pg->count = "
- "%d ; page %d of %d\n",
- local[mapped].addr, pga[mapped].pg->flags,
- page_count(pga[mapped].pg),
- mapped, page_count - 1);
+ if (rc < 0)
+ RETURN(rc);
- local[mapped].offset = pga[mapped].off;
- local[mapped].len = pga[mapped].count;
- ost_pack_niobuf(&nioptr, pga[mapped].off, pga[mapped].count,
- pga[mapped].flag, 0);
+ body = lustre_swab_repbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
+ if (body == NULL) {
+ CERROR ("Can't unpack body\n");
+ RETURN(-EPROTO);
}
- size[1] = page_count * sizeof(*remote);
- request->rq_replen = lustre_msg_size(2, size);
- rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
- if (rc)
- GOTO(out_unmap, rc);
+ osc_update_grant(cli, body);
+ memcpy(oa, &body->oa, sizeof(*oa));
- nioptr = lustre_msg_buf(request->rq_repmsg, 1);
- if (!nioptr)
- GOTO(out_unmap, rc = -EINVAL);
+ if (req->rq_reqmsg->opc == OST_WRITE) {
+ if (rc > 0) {
+ CERROR ("Unexpected +ve rc %d\n", rc);
+ RETURN(-EPROTO);
+ }
+ LASSERT (req->rq_bulk->bd_nob == requested_nob);
- if (request->rq_repmsg->buflens[1] != size[1]) {
- CERROR("buffer length wrong (%d vs. %d)\n",
- request->rq_repmsg->buflens[1], size[1]);
- GOTO(out_unmap, rc = -EINVAL);
+ RETURN(check_write_rcs(req, requested_nob, niocount,
+ page_count, pga));
}
- for (j = 0; j < page_count; j++) {
- struct ptlrpc_bulk_page *bulk;
+ if (rc > requested_nob) {
+ CERROR("Unexpected rc %d (%d requested)\n", rc, requested_nob);
+ RETURN(-EPROTO);
+ }
- ost_unpack_niobuf(&nioptr, &remote);
+ if (rc != req->rq_bulk->bd_nob_transferred) {
+ CERROR ("Unexpected rc %d (%d transferred)\n",
+ rc, req->rq_bulk->bd_nob_transferred);
+ return (-EPROTO);
+ }
- bulk = ptlrpc_prep_bulk_page(desc);
- if (!bulk)
- GOTO(out_unmap, rc = -ENOMEM);
+ if (rc < requested_nob)
+ handle_short_read(rc, page_count, pga);
+
+#if CHECKSUM_BULK
+ if (oa->o_valid & OBD_MD_FLCKSUM) {
+ const struct ptlrpc_peer *peer =
+ &req->rq_import->imp_connection->c_peer;
+ static int cksum_counter;
+ obd_count server_cksum = oa->o_cksum;
+ obd_count cksum = cksum_pages(rc, page_count, pga);
+ char str[PTL_NALFMT_SIZE];
+
+ ptlrpc_peernid2str(peer, str);
+
+ cksum_counter++;
+ if (server_cksum != cksum) {
+ CERROR("Bad checksum: server %x, client %x, server NID "
+ LPX64" (%s)\n", server_cksum, cksum,
+ peer->peer_id.nid, str);
+ cksum_counter = 0;
+ oa->o_cksum = cksum;
+ } else if ((cksum_counter & (-cksum_counter)) == cksum_counter){
+ CWARN("Checksum %u from "LPX64" (%s) OK: %x\n",
+ cksum_counter, peer->peer_id.nid, str, cksum);
+ }
+ } else {
+ static int cksum_missed;
- bulk->bp_buf = (void *)(unsigned long)local[j].addr;
- bulk->bp_buflen = local[j].len;
- bulk->bp_xid = remote->xid;
- bulk->bp_page = pga[j].pg;
+ cksum_missed++;
+ if ((cksum_missed & (-cksum_missed)) == cksum_missed)
+ CERROR("Request checksum %u from "LPX64", no reply\n",
+ cksum_missed,
+ req->rq_import->imp_connection->c_peer.peer_id.nid);
}
+#endif
+ RETURN(0);
+}
- if (desc->bd_page_count != page_count)
- LBUG();
+static int osc_brw_internal(int cmd, struct obd_export *exp,struct obdo *oa,
+ struct lov_stripe_md *lsm,
+ obd_count page_count, struct brw_page *pga)
+{
+ int requested_nob;
+ int niocount;
+ struct ptlrpc_request *request;
+ int rc;
+ ENTRY;
- if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_WRITE_BULK))
- GOTO(out_unmap, rc = 0);
+restart_bulk:
+ rc = osc_brw_prep_request(cmd, class_exp2cliimp(exp), oa, lsm,
+ page_count, pga, &requested_nob, &niocount,
+ &request);
+ if (rc != 0)
+ return (rc);
- OBD_FREE(local, page_count * sizeof(*local));
+ rc = ptlrpc_queue_wait(request);
+
+ if (rc == -ETIMEDOUT && request->rq_resend) {
+ DEBUG_REQ(D_HA, request, "BULK TIMEOUT");
+ ptlrpc_req_finished(request);
+ goto restart_bulk;
+ }
- /* One reference is released when brw_finish is complete, the other
- * when the caller removes it from the "set" list. */
- obd_brw_set_add(set, desc);
- rc = ptlrpc_send_bulk(desc);
+ rc = osc_brw_fini_request(request, oa, requested_nob, niocount,
+ page_count, pga, rc);
- /* XXX: Mike, same question as in osc_brw_read. */
-out_req:
ptlrpc_req_finished(request);
- RETURN(rc);
+ RETURN (rc);
+}
+
+static int brw_interpret(struct ptlrpc_request *request,
+ struct osc_brw_async_args *aa, int rc)
+{
+ struct obdo *oa = aa->aa_oa;
+ int requested_nob = aa->aa_requested_nob;
+ int niocount = aa->aa_nio_count;
+ obd_count page_count = aa->aa_page_count;
+ struct brw_page *pga = aa->aa_pga;
+ ENTRY;
+
+ rc = osc_brw_fini_request(request, oa, requested_nob, niocount,
+ page_count, pga, rc);
+ RETURN (rc);
+}
+
+static int async_internal(int cmd, struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *lsm, obd_count page_count,
+ struct brw_page *pga, struct ptlrpc_request_set *set)
+{
+ struct ptlrpc_request *request;
+ int requested_nob;
+ int nio_count;
+ struct osc_brw_async_args *aa;
+ int rc;
+ ENTRY;
+
+ rc = osc_brw_prep_request(cmd, class_exp2cliimp(exp), oa, lsm,
+ page_count, pga, &requested_nob, &nio_count,
+ &request);
+ if (rc == 0) {
+ LASSERT(sizeof(*aa) <= sizeof(request->rq_async_args));
+ aa = (struct osc_brw_async_args *)&request->rq_async_args;
+ aa->aa_oa = oa;
+ aa->aa_requested_nob = requested_nob;
+ aa->aa_nio_count = nio_count;
+ aa->aa_page_count = page_count;
+ aa->aa_pga = pga;
+
+ request->rq_interpret_reply = brw_interpret;
+ ptlrpc_set_add_req(set, request);
+ }
+ RETURN (rc);
+}
- /* Clean up on error. */
-out_unmap:
- while (mapped-- > 0)
- kunmap(pga[mapped].pg);
+#ifndef min_t
+#define min_t(type,x,y) \
+ ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
+#endif
- obd_kmap_put(page_count);
+/*
+ * ugh, we want disk allocation on the target to happen in offset order. we'll
+ * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
+ * fine for our small page arrays and doesn't require allocation. its an
+ * insertion sort that swaps elements that are strides apart, shrinking the
+ * stride down until its '1' and the array is sorted.
+ */
+static void sort_brw_pages(struct brw_page *array, int num)
+{
+ int stride, i, j;
+ struct brw_page tmp;
+
+ if (num == 1)
+ return;
+ for (stride = 1; stride < num ; stride = (stride * 3) + 1)
+ ;
+
+ do {
+ stride /= 3;
+ for (i = stride ; i < num ; i++) {
+ tmp = array[i];
+ j = i;
+ while (j >= stride && array[j - stride].disk_offset >
+ tmp.disk_offset) {
+ array[j] = array[j - stride];
+ j -= stride;
+ }
+ array[j] = tmp;
+ }
+ } while (stride > 1);
+}
- OBD_FREE(local, page_count * sizeof(*local));
-out_desc:
- ptlrpc_bulk_decref(desc);
- goto out_req;
+/* make sure we the regions we're passing to elan don't violate its '4
+ * fragments' constraint. portal headers are a fragment, all full
+ * PAGE_SIZE long pages count as 1 fragment, and each partial page
+ * counts as a fragment. I think. see bug 934. */
+static obd_count check_elan_limit(struct brw_page *pg, obd_count pages)
+{
+ int frags_left = 3;
+ int saw_whole_frag = 0;
+ int i;
+
+ for (i = 0 ; frags_left && i < pages ; pg++, i++) {
+ if (pg->count == PAGE_SIZE) {
+ if (!saw_whole_frag) {
+ saw_whole_frag = 1;
+ frags_left--;
+ }
+ } else {
+ frags_left--;
+ }
+ }
+ return i;
}
-static int osc_brw(int cmd, struct lustre_handle *conn,
- struct lov_stripe_md *md, obd_count page_count,
- struct brw_page *pga, struct obd_brw_set *set)
+static int osc_brw(int cmd, struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *lsm, obd_count page_count,
+ struct brw_page *pga, struct obd_trans_info *oti)
{
ENTRY;
+ if (cmd == OBD_BRW_CHECK) {
+ /* The caller just wants to know if there's a chance that this
+ * I/O can succeed */
+ struct obd_import *imp = class_exp2cliimp(exp);
+
+ if (imp == NULL || imp->imp_invalid)
+ RETURN(-EIO);
+ RETURN(0);
+ }
+
while (page_count) {
obd_count pages_per_brw;
int rc;
- if (page_count > PTL_MD_MAX_IOV)
- pages_per_brw = PTL_MD_MAX_IOV;
+ if (page_count > PTLRPC_MAX_BRW_PAGES)
+ pages_per_brw = PTLRPC_MAX_BRW_PAGES;
else
pages_per_brw = page_count;
- if (cmd & OBD_BRW_WRITE)
- rc = osc_brw_write(conn, md, pages_per_brw, pga, set);
- else
- rc = osc_brw_read(conn, md, pages_per_brw, pga, set);
+ sort_brw_pages(pga, pages_per_brw);
+ pages_per_brw = check_elan_limit(pga, pages_per_brw);
+
+ rc = osc_brw_internal(cmd, exp, oa, lsm, pages_per_brw, pga);
if (rc != 0)
RETURN(rc);
RETURN(0);
}
-static int osc_enqueue(struct lustre_handle *connh, struct lov_stripe_md *lsm,
- struct lustre_handle *parent_lock,
- __u32 type, void *extentp, int extent_len, __u32 mode,
- int *flags, void *callback, void *data, int datalen,
- struct lustre_handle *lockh)
+static int osc_brw_async(int cmd, struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *lsm, obd_count page_count,
+ struct brw_page *pga, struct ptlrpc_request_set *set,
+ struct obd_trans_info *oti)
{
- __u64 res_id[RES_NAME_SIZE] = { lsm->lsm_object_id };
- struct obd_device *obddev = class_conn2obd(connh);
- struct ldlm_extent *extent = extentp;
- int rc;
ENTRY;
- /* Filesystem locks are given a bit of special treatment: if
- * this is not a file size lock (which has end == -1), we
- * fixup the lock to start and end on page boundaries. */
- if (extent->end != OBD_OBJECT_EOF) {
- extent->start &= PAGE_MASK;
- extent->end = (extent->end & PAGE_MASK) + PAGE_SIZE - 1;
+ if (cmd == OBD_BRW_CHECK) {
+ /* The caller just wants to know if there's a chance that this
+ * I/O can succeed */
+ struct obd_import *imp = class_exp2cliimp(exp);
+
+ if (imp == NULL || imp->imp_invalid)
+ RETURN(-EIO);
+ RETURN(0);
}
- /* Next, search for already existing extent locks that will cover us */
- rc = ldlm_lock_match(obddev->obd_namespace, res_id, type, extent,
- sizeof(extent), mode, lockh);
- if (rc == 1)
- /* We already have a lock, and it's referenced */
- RETURN(ELDLM_OK);
+ while (page_count) {
+ obd_count pages_per_brw;
+ int rc;
- /* If we're trying to read, we also search for an existing PW lock. The
- * VFS and page cache already protect us locally, so lots of readers/
- * writers can share a single PW lock.
- *
+ if (page_count > PTLRPC_MAX_BRW_PAGES)
+ pages_per_brw = PTLRPC_MAX_BRW_PAGES;
+ else
+ pages_per_brw = page_count;
+
+ sort_brw_pages(pga, pages_per_brw);
+ pages_per_brw = check_elan_limit(pga, pages_per_brw);
+
+ rc = async_internal(cmd, exp, oa, lsm, pages_per_brw, pga, set);
+
+ if (rc != 0)
+ RETURN(rc);
+
+ page_count -= pages_per_brw;
+ pga += pages_per_brw;
+ }
+ RETURN(0);
+}
+
+static void osc_check_rpcs(struct client_obd *cli);
+static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
+ int sent);
+static void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi);
+static void lop_update_pending(struct client_obd *cli,
+ struct loi_oap_pages *lop, int cmd, int delta);
+
+/* this is called when a sync waiter receives an interruption. Its job is to
+ * get the caller woken as soon as possible. If its page hasn't been put in an
+ * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
+ * desiring interruption which will forcefully complete the rpc once the rpc
+ * has timed out */
+static void osc_occ_interrupted(struct oig_callback_context *occ)
+{
+ struct osc_async_page *oap;
+ struct loi_oap_pages *lop;
+ struct lov_oinfo *loi;
+ ENTRY;
+
+ /* XXX member_of() */
+ oap = list_entry(occ, struct osc_async_page, oap_occ);
+
+ spin_lock(&oap->oap_cli->cl_loi_list_lock);
+
+ oap->oap_interrupted = 1;
+
+ /* ok, it's been put in an rpc. */
+ if (oap->oap_request != NULL) {
+ ptlrpc_mark_interrupted(oap->oap_request);
+ ptlrpcd_wake(oap->oap_request);
+ GOTO(unlock, 0);
+ }
+
+ /* we don't get interruption callbacks until osc_trigger_sync_io()
+ * has been called and put the sync oaps in the pending/urgent lists.*/
+ if (!list_empty(&oap->oap_pending_item)) {
+ list_del_init(&oap->oap_pending_item);
+ if (oap->oap_async_flags & ASYNC_URGENT)
+ list_del_init(&oap->oap_urgent_item);
+
+ loi = oap->oap_loi;
+ lop = (oap->oap_cmd == OBD_BRW_WRITE) ?
+ &loi->loi_write_lop : &loi->loi_read_lop;
+ lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
+ loi_list_maint(oap->oap_cli, oap->oap_loi);
+
+ oig_complete_one(oap->oap_oig, &oap->oap_occ, 0);
+ oap->oap_oig = NULL;
+ }
+
+unlock:
+ spin_unlock(&oap->oap_cli->cl_loi_list_lock);
+}
+
+/* this must be called holding the loi list lock to give coverage to exit_cache,
+ * async_flag maintenance, and oap_request */
+static void osc_ap_completion(struct client_obd *cli, struct obdo *oa,
+ struct osc_async_page *oap, int sent, int rc)
+{
+ osc_exit_cache(cli, oap, sent);
+ oap->oap_async_flags = 0;
+ oap->oap_interrupted = 0;
+
+ if (oap->oap_request != NULL) {
+ ptlrpc_req_finished(oap->oap_request);
+ oap->oap_request = NULL;
+ }
+
+ if (rc == 0 && oa != NULL)
+ oap->oap_loi->loi_blocks = oa->o_blocks;
+
+ if (oap->oap_oig) {
+ oig_complete_one(oap->oap_oig, &oap->oap_occ, rc);
+ oap->oap_oig = NULL;
+ EXIT;
+ return;
+ }
+
+ oap->oap_caller_ops->ap_completion(oap->oap_caller_data, oap->oap_cmd,
+ oa, rc);
+}
+
+static int brw_interpret_oap(struct ptlrpc_request *request,
+ struct osc_brw_async_args *aa, int rc)
+{
+ struct osc_async_page *oap;
+ struct client_obd *cli;
+ struct list_head *pos, *n;
+ struct timeval now;
+ ENTRY;
+
+ do_gettimeofday(&now);
+ rc = osc_brw_fini_request(request, aa->aa_oa, aa->aa_requested_nob,
+ aa->aa_nio_count, aa->aa_page_count,
+ aa->aa_pga, rc);
+
+ CDEBUG(D_INODE, "request %p aa %p rc %d\n", request, aa, rc);
+
+ cli = aa->aa_cli;
+ /* in failout recovery we ignore writeback failure and want
+ * to just tell llite to unlock the page and continue */
+ if (request->rq_reqmsg->opc == OST_WRITE &&
+ (cli->cl_import == NULL || cli->cl_import->imp_invalid)) {
+ CDEBUG(D_INODE, "flipping to rc 0 imp %p inv %d\n",
+ cli->cl_import,
+ cli->cl_import ? cli->cl_import->imp_invalid : -1);
+ rc = 0;
+ }
+
+ spin_lock(&cli->cl_loi_list_lock);
+
+ if (request->rq_reqmsg->opc == OST_WRITE)
+ lprocfs_stime_record(&cli->cl_write_stime, &now,
+ &request->rq_rpcd_start);
+ else
+ lprocfs_stime_record(&cli->cl_read_stime, &now,
+ &request->rq_rpcd_start);
+
+
+
+ /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
+ * is called so we know whether to go to sync BRWs or wait for more
+ * RPCs to complete */
+ if (request->rq_reqmsg->opc == OST_WRITE)
+ cli->cl_w_in_flight--;
+ else
+ cli->cl_r_in_flight--;
+
+ /* the caller may re-use the oap after the completion call so
+ * we need to clean it up a little */
+ list_for_each_safe(pos, n, &aa->aa_oaps) {
+ oap = list_entry(pos, struct osc_async_page, oap_rpc_item);
+
+ //CDEBUG(D_INODE, "page %p index %lu oap %p\n",
+ //oap->oap_page, oap->oap_page->index, oap);
+
+ list_del_init(&oap->oap_rpc_item);
+ osc_ap_completion(cli, aa->aa_oa, oap, 1, rc);
+ }
+
+ osc_wake_cache_waiters(cli);
+ osc_check_rpcs(cli);
+ spin_unlock(&cli->cl_loi_list_lock);
+
+ obdo_free(aa->aa_oa);
+ OBD_FREE(aa->aa_pga, aa->aa_page_count * sizeof(struct brw_page));
+
+ RETURN(0);
+}
+
+static struct ptlrpc_request *osc_build_req(struct client_obd *cli,
+ struct list_head *rpc_list,
+ int page_count, int cmd)
+{
+ struct ptlrpc_request *req;
+ struct brw_page *pga = NULL;
+ int requested_nob, nio_count;
+ struct osc_brw_async_args *aa;
+ struct obdo *oa = NULL;
+ struct obd_async_page_ops *ops = NULL;
+ void *caller_data = NULL;
+ struct list_head *pos;
+ int i, rc;
+
+ LASSERT(!list_empty(rpc_list));
+
+ OBD_ALLOC(pga, sizeof(*pga) * page_count);
+ if (pga == NULL)
+ RETURN(ERR_PTR(-ENOMEM));
+
+ oa = obdo_alloc();
+ if (oa == NULL)
+ GOTO(out, req = ERR_PTR(-ENOMEM));
+
+ i = 0;
+ list_for_each(pos, rpc_list) {
+ struct osc_async_page *oap;
+
+ oap = list_entry(pos, struct osc_async_page, oap_rpc_item);
+ if (ops == NULL) {
+ ops = oap->oap_caller_ops;
+ caller_data = oap->oap_caller_data;
+ }
+ pga[i].disk_offset = oap->oap_obj_off + oap->oap_page_off;
+ pga[i].page_offset = pga[i].disk_offset;
+ pga[i].pg = oap->oap_page;
+ pga[i].count = oap->oap_count;
+ pga[i].flag = oap->oap_brw_flags;
+ CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
+ pga[i].pg, oap->oap_page->index, oap, pga[i].flag);
+ i++;
+ }
+
+ /* always get the data for the obdo for the rpc */
+ LASSERT(ops != NULL);
+ ops->ap_fill_obdo(caller_data, cmd, oa);
+
+ sort_brw_pages(pga, page_count);
+ rc = osc_brw_prep_request(cmd, cli->cl_import, oa, NULL, page_count,
+ pga, &requested_nob, &nio_count, &req);
+ if (rc != 0) {
+ CERROR("prep_req failed: %d\n", rc);
+ GOTO(out, req = ERR_PTR(rc));
+ }
+
+ LASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
+ aa = (struct osc_brw_async_args *)&req->rq_async_args;
+ aa->aa_oa = oa;
+ aa->aa_requested_nob = requested_nob;
+ aa->aa_nio_count = nio_count;
+ aa->aa_page_count = page_count;
+ aa->aa_pga = pga;
+ aa->aa_cli = cli;
+
+out:
+ if (IS_ERR(req)) {
+ if (oa)
+ obdo_free(oa);
+ if (pga)
+ OBD_FREE(pga, sizeof(*pga) * page_count);
+ }
+ RETURN(req);
+}
+
+static void lop_update_pending(struct client_obd *cli,
+ struct loi_oap_pages *lop, int cmd, int delta)
+{
+ lop->lop_num_pending += delta;
+ if (cmd == OBD_BRW_WRITE)
+ cli->cl_pending_w_pages += delta;
+ else
+ cli->cl_pending_r_pages += delta;
+}
+
+/* the loi lock is held across this function but it's allowed to release
+ * and reacquire it during its work */
+static int osc_send_oap_rpc(struct client_obd *cli, struct lov_oinfo *loi,
+ int cmd, struct loi_oap_pages *lop)
+{
+ struct ptlrpc_request *request;
+ obd_count page_count = 0;
+ struct list_head *tmp, *pos;
+ struct osc_async_page *oap = NULL;
+ struct osc_brw_async_args *aa;
+ struct obd_async_page_ops *ops;
+ LIST_HEAD(rpc_list);
+ ENTRY;
+
+ /* first we find the pages we're allowed to work with */
+ list_for_each_safe(pos, tmp, &lop->lop_pending) {
+ oap = list_entry(pos, struct osc_async_page, oap_pending_item);
+ ops = oap->oap_caller_ops;
+
+ LASSERT(oap->oap_magic == OAP_MAGIC);
+
+ /* in llite being 'ready' equates to the page being locked
+ * until completion unlocks it. commit_write submits a page
+ * as not ready because its unlock will happen unconditionally
+ * as the call returns. if we race with commit_write giving
+ * us that page we dont' want to create a hole in the page
+ * stream, so we stop and leave the rpc to be fired by
+ * another dirtier or kupdated interval (the not ready page
+ * will still be on the dirty list). we could call in
+ * at the end of ll_file_write to process the queue again. */
+ if (!(oap->oap_async_flags & ASYNC_READY)) {
+ int rc = ops->ap_make_ready(oap->oap_caller_data, cmd);
+ if (rc < 0)
+ CDEBUG(D_INODE, "oap %p page %p returned %d "
+ "instead of ready\n", oap,
+ oap->oap_page, rc);
+ switch (rc) {
+ case -EAGAIN:
+ /* llite is telling us that the page is still
+ * in commit_write and that we should try
+ * and put it in an rpc again later. we
+ * break out of the loop so we don't create
+ * a hole in the sequence of pages in the rpc
+ * stream.*/
+ pos = NULL;
+ break;
+ case -EINTR:
+ /* the io isn't needed.. tell the checks
+ * below to complete the rpc with EINTR */
+ oap->oap_async_flags |= ASYNC_COUNT_STABLE;
+ oap->oap_count = -EINTR;
+ break;
+ case 0:
+ oap->oap_async_flags |= ASYNC_READY;
+ break;
+ default:
+ LASSERTF(0, "oap %p page %p returned %d "
+ "from make_ready\n", oap,
+ oap->oap_page, rc);
+ break;
+ }
+ }
+ if (pos == NULL)
+ break;
+
+ /* take the page out of our book-keeping */
+ list_del_init(&oap->oap_pending_item);
+ lop_update_pending(cli, lop, cmd, -1);
+ list_del_init(&oap->oap_urgent_item);
+
+ /* ask the caller for the size of the io as the rpc leaves. */
+ if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE))
+ oap->oap_count =
+ ops->ap_refresh_count(oap->oap_caller_data,cmd);
+ if (oap->oap_count <= 0) {
+ CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
+ oap->oap_count);
+ osc_ap_completion(cli, NULL, oap, 0, oap->oap_count);
+ continue;
+ }
+
+ /* now put the page back in our accounting */
+ list_add_tail(&oap->oap_rpc_item, &rpc_list);
+ if (++page_count >= cli->cl_max_pages_per_rpc)
+ break;
+ }
+
+ osc_wake_cache_waiters(cli);
+
+ if (page_count == 0)
+ RETURN(0);
+
+ loi_list_maint(cli, loi);
+ spin_unlock(&cli->cl_loi_list_lock);
+
+ request = osc_build_req(cli, &rpc_list, page_count, cmd);
+ if (IS_ERR(request)) {
+ /* this should happen rarely and is pretty bad, it makes the
+ * pending list not follow the dirty order */
+ spin_lock(&cli->cl_loi_list_lock);
+ list_for_each_safe(pos, tmp, &rpc_list) {
+ oap = list_entry(pos, struct osc_async_page,
+ oap_rpc_item);
+ list_del_init(&oap->oap_rpc_item);
+
+ /* queued sync pages can be torn down while the pages
+ * were between the pending list and the rpc */
+ if (oap->oap_interrupted) {
+ CDEBUG(D_INODE, "oap %p interrupted\n", oap);
+ osc_ap_completion(cli, NULL, oap, 0,
+ oap->oap_count);
+ continue;
+ }
+
+ /* put the page back in the loi/lop lists */
+ list_add_tail(&oap->oap_pending_item,
+ &lop->lop_pending);
+ lop_update_pending(cli, lop, cmd, 1);
+ if (oap->oap_async_flags & ASYNC_URGENT)
+ list_add(&oap->oap_urgent_item,
+ &lop->lop_urgent);
+ }
+ loi_list_maint(cli, loi);
+ RETURN(PTR_ERR(request));
+ }
+
+ LASSERT(sizeof(*aa) <= sizeof(request->rq_async_args));
+ aa = (struct osc_brw_async_args *)&request->rq_async_args;
+ INIT_LIST_HEAD(&aa->aa_oaps);
+ list_splice(&rpc_list, &aa->aa_oaps);
+ INIT_LIST_HEAD(&rpc_list);
+
+#ifdef __KERNEL__
+ if (cmd == OBD_BRW_READ) {
+ lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
+ lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
+ } else {
+ lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
+ lprocfs_oh_tally(&cli->cl_write_rpc_hist,
+ cli->cl_w_in_flight);
+ }
+#endif
+
+ spin_lock(&cli->cl_loi_list_lock);
+
+ if (cmd == OBD_BRW_READ)
+ cli->cl_r_in_flight++;
+ else
+ cli->cl_w_in_flight++;
+ /* queued sync pages can be torn down while the pages
+ * were between the pending list and the rpc */
+ list_for_each(pos, &aa->aa_oaps) {
+ oap = list_entry(pos, struct osc_async_page, oap_rpc_item);
+ if (oap->oap_interrupted) {
+ CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
+ oap, request);
+ ptlrpc_mark_interrupted(request);
+ break;
+ }
+ }
+
+ CDEBUG(D_INODE, "req %p: %d pages, aa %p. now %dr/%dw in flight\n",
+ request, page_count, aa, cli->cl_r_in_flight,
+ cli->cl_w_in_flight);
+
+ oap->oap_request = ptlrpc_request_addref(request);
+ request->rq_interpret_reply = brw_interpret_oap;
+ ptlrpcd_add_req(request);
+ RETURN(1);
+}
+
+static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
+ int cmd)
+{
+ int optimal;
+ ENTRY;
+
+ if (lop->lop_num_pending == 0)
+ RETURN(0);
+
+ /* if we have an invalid import we want to drain the queued pages
+ * by forcing them through rpcs that immediately fail and complete
+ * the pages. recovery relies on this to empty the queued pages
+ * before canceling the locks and evicting down the llite pages */
+ if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
+ RETURN(1);
+
+ /* stream rpcs in queue order as long as as there is an urgent page
+ * queued. this is our cheap solution for good batching in the case
+ * where writepage marks some random page in the middle of the file as
+ * urgent because of, say, memory pressure */
+ if (!list_empty(&lop->lop_urgent))
+ RETURN(1);
+
+ /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
+ optimal = cli->cl_max_pages_per_rpc;
+ if (cmd == OBD_BRW_WRITE) {
+ /* trigger a write rpc stream as long as there are dirtiers
+ * waiting for space. as they're waiting, they're not going to
+ * create more pages to coallesce with what's waiting.. */
+ if (!list_empty(&cli->cl_cache_waiters))
+ RETURN(1);
+
+ /* *2 to avoid triggering rpcs that would want to include pages
+ * that are being queued but which can't be made ready until
+ * the queuer finishes with the page. this is a wart for
+ * llite::commit_write() */
+ optimal += 16;
+ }
+ if (lop->lop_num_pending >= optimal)
+ RETURN(1);
+
+ RETURN(0);
+}
+
+static void on_list(struct list_head *item, struct list_head *list,
+ int should_be_on)
+{
+ if (list_empty(item) && should_be_on)
+ list_add_tail(item, list);
+ else if (!list_empty(item) && !should_be_on)
+ list_del_init(item);
+}
+
+/* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
+ * can find pages to build into rpcs quickly */
+static void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
+{
+ on_list(&loi->loi_cli_item, &cli->cl_loi_ready_list,
+ lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE) ||
+ lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
+
+ on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
+ loi->loi_write_lop.lop_num_pending);
+
+ on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
+ loi->loi_read_lop.lop_num_pending);
+}
+
+#define LOI_DEBUG(LOI, STR, args...) \
+ CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
+ !list_empty(&(LOI)->loi_cli_item), \
+ (LOI)->loi_write_lop.lop_num_pending, \
+ !list_empty(&(LOI)->loi_write_lop.lop_urgent), \
+ (LOI)->loi_read_lop.lop_num_pending, \
+ !list_empty(&(LOI)->loi_read_lop.lop_urgent), \
+ args) \
+
+struct lov_oinfo *osc_next_loi(struct client_obd *cli)
+{
+ ENTRY;
+ /* first return all objects which we already know to have
+ * pages ready to be stuffed into rpcs */
+ if (!list_empty(&cli->cl_loi_ready_list))
+ RETURN(list_entry(cli->cl_loi_ready_list.next,
+ struct lov_oinfo, loi_cli_item));
+
+ /* then if we have cache waiters, return all objects with queued
+ * writes. This is especially important when many small files
+ * have filled up the cache and not been fired into rpcs because
+ * they don't pass the nr_pending/object threshhold */
+ if (!list_empty(&cli->cl_cache_waiters) &&
+ !list_empty(&cli->cl_loi_write_list))
+ RETURN(list_entry(cli->cl_loi_write_list.next,
+ struct lov_oinfo, loi_write_item));
+
+ /* then return all queued objects when we have an invalid import
+ * so that they get flushed */
+ if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
+ if (!list_empty(&cli->cl_loi_write_list))
+ RETURN(list_entry(cli->cl_loi_write_list.next,
+ struct lov_oinfo, loi_write_item));
+ if (!list_empty(&cli->cl_loi_read_list))
+ RETURN(list_entry(cli->cl_loi_read_list.next,
+ struct lov_oinfo, loi_read_item));
+ }
+ RETURN(NULL);
+}
+
+/* called with the loi list lock held */
+static void osc_check_rpcs(struct client_obd *cli)
+{
+ struct lov_oinfo *loi;
+ int rc = 0, race_counter = 0;
+ ENTRY;
+
+ while ((loi = osc_next_loi(cli)) != NULL) {
+ LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
+
+ if (rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight)
+ break;
+
+ /* attempt some read/write balancing by alternating between
+ * reads and writes in an object. The makes_rpc checks here
+ * would be redundant if we were getting read/write work items
+ * instead of objects. we don't want send_oap_rpc to drain a
+ * partial read pending queue when we're given this object to
+ * do io on writes while there are cache waiters */
+ if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
+ rc = osc_send_oap_rpc(cli, loi, OBD_BRW_WRITE,
+ &loi->loi_write_lop);
+ if (rc < 0)
+ break;
+ if (rc > 0)
+ race_counter = 0;
+ else
+ race_counter++;
+ }
+ if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
+ rc = osc_send_oap_rpc(cli, loi, OBD_BRW_READ,
+ &loi->loi_read_lop);
+ if (rc < 0)
+ break;
+ if (rc > 0)
+ race_counter = 0;
+ else
+ race_counter++;
+ }
+
+ /* attempt some inter-object balancing by issueing rpcs
+ * for each object in turn */
+ if (!list_empty(&loi->loi_cli_item))
+ list_del_init(&loi->loi_cli_item);
+ if (!list_empty(&loi->loi_write_item))
+ list_del_init(&loi->loi_write_item);
+ if (!list_empty(&loi->loi_read_item))
+ list_del_init(&loi->loi_read_item);
+
+ loi_list_maint(cli, loi);
+
+ /* send_oap_rpc fails with 0 when make_ready tells it to
+ * back off. llite's make_ready does this when it tries
+ * to lock a page queued for write that is already locked.
+ * we want to try sending rpcs from many objects, but we
+ * don't want to spin failing with 0. */
+ if (race_counter == 10)
+ break;
+ }
+ EXIT;
+}
+
+/* we're trying to queue a page in the osc so we're subject to the
+ * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
+ * If the osc's queued pages are already at that limit, then we want to sleep
+ * until there is space in the osc's queue for us. We also may be waiting for
+ * write credits from the OST if there are RPCs in flight that may return some
+ * before we fall back to sync writes.
+ *
+ * We need this know our allocation was granted in the presence of signals */
+static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
+{
+ int rc;
+ ENTRY;
+ spin_lock(&cli->cl_loi_list_lock);
+ rc = list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
+ spin_unlock(&cli->cl_loi_list_lock);
+ RETURN(rc);
+};
+
+/* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
+ * grant or cache space. */
+static int osc_enter_cache(struct client_obd *cli, struct lov_oinfo *loi,
+ struct osc_async_page *oap)
+{
+ struct osc_cache_waiter ocw;
+ struct l_wait_info lwi = { 0 };
+ struct timeval start, stop;
+
+ CDEBUG(D_CACHE, "dirty: %ld dirty_max: %ld dropped: %lu grant: %lu\n",
+ cli->cl_dirty, cli->cl_dirty_max, cli->cl_lost_grant,
+ cli->cl_avail_grant);
+
+ if (cli->cl_dirty_max < PAGE_SIZE)
+ return(-EDQUOT);
+
+ /* Hopefully normal case - cache space and write credits available */
+ if (cli->cl_dirty + PAGE_SIZE <= cli->cl_dirty_max &&
+ cli->cl_avail_grant >= PAGE_SIZE) {
+ /* account for ourselves */
+ osc_consume_write_grant(cli, oap);
+ return(0);
+ }
+
+ /* Make sure that there are write rpcs in flight to wait for. This
+ * is a little silly as this object may not have any pending but
+ * other objects sure might. */
+ if (cli->cl_w_in_flight) {
+ list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
+ init_waitqueue_head(&ocw.ocw_waitq);
+ ocw.ocw_oap = oap;
+ ocw.ocw_rc = 0;
+
+ loi_list_maint(cli, loi);
+ osc_check_rpcs(cli);
+ spin_unlock(&cli->cl_loi_list_lock);
+
+ CDEBUG(0, "sleeping for cache space\n");
+ do_gettimeofday(&start);
+ l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
+ do_gettimeofday(&stop);
+ spin_lock(&cli->cl_loi_list_lock);
+ lprocfs_stime_record(&cli->cl_enter_stime, &stop, &start);
+ if (!list_empty(&ocw.ocw_entry)) {
+ list_del(&ocw.ocw_entry);
+ RETURN(-EINTR);
+ }
+ RETURN(ocw.ocw_rc);
+ }
+
+ RETURN(-EDQUOT);
+}
+
+/* the companion to enter_cache, called when an oap is no longer part of the
+ * dirty accounting.. so writeback completes or truncate happens before writing
+ * starts. must be called with the loi lock held. */
+static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
+ int sent)
+{
+ ENTRY;
+
+ if (!(oap->oap_brw_flags & OBD_BRW_FROM_GRANT)) {
+ EXIT;
+ return;
+ }
+
+ oap->oap_brw_flags &= ~OBD_BRW_FROM_GRANT;
+ cli->cl_dirty -= PAGE_SIZE;
+ if (!sent) {
+ cli->cl_lost_grant += PAGE_SIZE;
+ CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
+ cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
+ }
+
+ EXIT;
+}
+
+int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
+ struct lov_oinfo *loi, struct page *page,
+ obd_off offset, struct obd_async_page_ops *ops,
+ void *data, void **res)
+{
+ struct osc_async_page *oap;
+ ENTRY;
+
+ OBD_ALLOC(oap, sizeof(*oap));
+ if (oap == NULL)
+ return -ENOMEM;
+
+ oap->oap_magic = OAP_MAGIC;
+ oap->oap_cli = &exp->exp_obd->u.cli;
+ oap->oap_loi = loi;
+
+ oap->oap_caller_ops = ops;
+ oap->oap_caller_data = data;
+
+ oap->oap_page = page;
+ oap->oap_obj_off = offset;
+
+ INIT_LIST_HEAD(&oap->oap_pending_item);
+ INIT_LIST_HEAD(&oap->oap_urgent_item);
+ INIT_LIST_HEAD(&oap->oap_rpc_item);
+
+ oap->oap_occ.occ_interrupted = osc_occ_interrupted;
+
+ CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
+ *res = oap;
+ RETURN(0);
+}
+
+static int osc_queue_async_io(struct obd_export *exp, struct lov_stripe_md *lsm,
+ struct lov_oinfo *loi, void *cookie,
+ int cmd, obd_off off, int count,
+ obd_flags brw_flags, enum async_flags async_flags)
+{
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+ struct osc_async_page *oap;
+ struct loi_oap_pages *lop;
+ int rc;
+ ENTRY;
+
+ oap = OAP_FROM_COOKIE(cookie);
+
+ if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
+ RETURN(-EIO);
+
+ if (!list_empty(&oap->oap_pending_item) ||
+ !list_empty(&oap->oap_urgent_item) ||
+ !list_empty(&oap->oap_rpc_item))
+ RETURN(-EBUSY);
+
+ if (loi == NULL)
+ loi = &lsm->lsm_oinfo[0];
+
+ spin_lock(&cli->cl_loi_list_lock);
+
+ oap->oap_cmd = cmd;
+ oap->oap_async_flags = async_flags;
+ oap->oap_page_off = off;
+ oap->oap_count = count;
+ oap->oap_brw_flags = brw_flags;
+
+ if (cmd == OBD_BRW_WRITE) {
+ rc = osc_enter_cache(cli, loi, oap);
+ if (rc) {
+ spin_unlock(&cli->cl_loi_list_lock);
+ RETURN(rc);
+ }
+ lop = &loi->loi_write_lop;
+ } else {
+ lop = &loi->loi_read_lop;
+ }
+
+ if (oap->oap_async_flags & ASYNC_URGENT)
+ list_add(&oap->oap_urgent_item, &lop->lop_urgent);
+ list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
+ lop_update_pending(cli, lop, cmd, 1);
+
+ loi_list_maint(cli, loi);
+
+ LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
+ cmd);
+
+ osc_check_rpcs(cli);
+ spin_unlock(&cli->cl_loi_list_lock);
+
+ RETURN(0);
+}
+
+/* aka (~was & now & flag), but this is more clear :) */
+#define SETTING(was, now, flag) (!(was & flag) && (now & flag))
+
+static int osc_set_async_flags(struct obd_export *exp,
+ struct lov_stripe_md *lsm,
+ struct lov_oinfo *loi, void *cookie,
+ obd_flags async_flags)
+{
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+ struct loi_oap_pages *lop;
+ struct osc_async_page *oap;
+ int rc = 0;
+ ENTRY;
+
+ oap = OAP_FROM_COOKIE(cookie);
+
+ if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
+ RETURN(-EIO);
+
+ if (loi == NULL)
+ loi = &lsm->lsm_oinfo[0];
+
+ if (oap->oap_cmd == OBD_BRW_WRITE) {
+ lop = &loi->loi_write_lop;
+ } else {
+ lop = &loi->loi_read_lop;
+ }
+
+ spin_lock(&cli->cl_loi_list_lock);
+
+ if (list_empty(&oap->oap_pending_item))
+ GOTO(out, rc = -EINVAL);
+
+ if ((oap->oap_async_flags & async_flags) == async_flags)
+ GOTO(out, rc = 0);
+
+ if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
+ oap->oap_async_flags |= ASYNC_READY;
+
+ if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT)) {
+ if (list_empty(&oap->oap_rpc_item)) {
+ list_add(&oap->oap_urgent_item, &lop->lop_urgent);
+ loi_list_maint(cli, loi);
+ }
+ }
+
+ LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
+ oap->oap_async_flags);
+out:
+ osc_check_rpcs(cli);
+ spin_unlock(&cli->cl_loi_list_lock);
+ RETURN(rc);
+}
+
+static int osc_queue_group_io(struct obd_export *exp, struct lov_stripe_md *lsm,
+ struct lov_oinfo *loi,
+ struct obd_io_group *oig, void *cookie,
+ int cmd, obd_off off, int count,
+ obd_flags brw_flags,
+ obd_flags async_flags)
+{
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+ struct osc_async_page *oap;
+ struct loi_oap_pages *lop;
+ ENTRY;
+
+ oap = OAP_FROM_COOKIE(cookie);
+
+ if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
+ RETURN(-EIO);
+
+ if (!list_empty(&oap->oap_pending_item) ||
+ !list_empty(&oap->oap_urgent_item) ||
+ !list_empty(&oap->oap_rpc_item))
+ RETURN(-EBUSY);
+
+ if (loi == NULL)
+ loi = &lsm->lsm_oinfo[0];
+
+ spin_lock(&cli->cl_loi_list_lock);
+
+ oap->oap_cmd = cmd;
+ oap->oap_page_off = off;
+ oap->oap_count = count;
+ oap->oap_brw_flags = brw_flags;
+ oap->oap_async_flags = async_flags;
+
+ if (cmd == OBD_BRW_WRITE)
+ lop = &loi->loi_write_lop;
+ else
+ lop = &loi->loi_read_lop;
+
+ list_add_tail(&oap->oap_pending_item, &lop->lop_pending_group);
+ if (oap->oap_async_flags & ASYNC_GROUP_SYNC) {
+ oap->oap_oig = oig;
+ oig_add_one(oig, &oap->oap_occ);
+ }
+
+ LOI_DEBUG(loi, "oap %p page %p on group pending\n", oap, oap->oap_page);
+
+ spin_unlock(&cli->cl_loi_list_lock);
+
+ RETURN(0);
+}
+
+static void osc_group_to_pending(struct client_obd *cli, struct lov_oinfo *loi,
+ struct loi_oap_pages *lop, int cmd)
+{
+ struct list_head *pos, *tmp;
+ struct osc_async_page *oap;
+
+ list_for_each_safe(pos, tmp, &lop->lop_pending_group) {
+ oap = list_entry(pos, struct osc_async_page, oap_pending_item);
+ list_del(&oap->oap_pending_item);
+ list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
+ list_add(&oap->oap_urgent_item, &lop->lop_urgent);
+ lop_update_pending(cli, lop, cmd, 1);
+ }
+ loi_list_maint(cli, loi);
+}
+
+static int osc_trigger_group_io(struct obd_export *exp,
+ struct lov_stripe_md *lsm,
+ struct lov_oinfo *loi,
+ struct obd_io_group *oig)
+{
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+ ENTRY;
+
+ if (loi == NULL)
+ loi = &lsm->lsm_oinfo[0];
+
+ spin_lock(&cli->cl_loi_list_lock);
+
+ osc_group_to_pending(cli, loi, &loi->loi_write_lop, OBD_BRW_WRITE);
+ osc_group_to_pending(cli, loi, &loi->loi_read_lop, OBD_BRW_READ);
+
+ osc_check_rpcs(cli);
+ spin_unlock(&cli->cl_loi_list_lock);
+
+ RETURN(0);
+}
+
+static int osc_teardown_async_page(struct obd_export *exp,
+ struct lov_stripe_md *lsm,
+ struct lov_oinfo *loi, void *cookie)
+{
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+ struct loi_oap_pages *lop;
+ struct osc_async_page *oap;
+ int rc = 0;
+ ENTRY;
+
+ oap = OAP_FROM_COOKIE(cookie);
+
+ if (loi == NULL)
+ loi = &lsm->lsm_oinfo[0];
+
+ if (oap->oap_cmd == OBD_BRW_WRITE) {
+ lop = &loi->loi_write_lop;
+ } else {
+ lop = &loi->loi_read_lop;
+ }
+
+ spin_lock(&cli->cl_loi_list_lock);
+
+ if (!list_empty(&oap->oap_rpc_item))
+ GOTO(out, rc = -EBUSY);
+
+ osc_exit_cache(cli, oap, 0);
+ osc_wake_cache_waiters(cli);
+
+ if (!list_empty(&oap->oap_urgent_item)) {
+ list_del_init(&oap->oap_urgent_item);
+ oap->oap_async_flags &= ~ASYNC_URGENT;
+ }
+ if (!list_empty(&oap->oap_pending_item)) {
+ list_del_init(&oap->oap_pending_item);
+ lop_update_pending(cli, lop, oap->oap_cmd, -1);
+ }
+ loi_list_maint(cli, loi);
+
+ LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
+out:
+ spin_unlock(&cli->cl_loi_list_lock);
+ if (rc == 0)
+ OBD_FREE(oap, sizeof(*oap));
+ RETURN(rc);
+}
+
+#ifdef __KERNEL__
+/* Note: caller will lock/unlock, and set uptodate on the pages */
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static int sanosc_brw_read(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *lsm, obd_count page_count,
+ struct brw_page *pga)
+{
+ struct ptlrpc_request *request = NULL;
+ struct ost_body *body;
+ struct niobuf_remote *nioptr;
+ struct obd_ioobj *iooptr;
+ int rc, size[3] = {sizeof(*body)}, mapped = 0;
+ int swab;
+ ENTRY;
+
+ /* XXX does not handle 'new' brw protocol */
+
+ size[1] = sizeof(struct obd_ioobj);
+ size[2] = page_count * sizeof(*nioptr);
+
+ request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
+ OST_SAN_READ, 3, size, NULL);
+ if (!request)
+ RETURN(-ENOMEM);
+
+ body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof(*body));
+ iooptr = lustre_msg_buf(request->rq_reqmsg, 1, sizeof(*iooptr));
+ nioptr = lustre_msg_buf(request->rq_reqmsg, 2,
+ sizeof(*nioptr) * page_count);
+
+ memcpy(&body->oa, oa, sizeof(body->oa));
+
+ obdo_to_ioobj(oa, iooptr);
+ iooptr->ioo_bufcnt = page_count;
+
+ for (mapped = 0; mapped < page_count; mapped++, nioptr++) {
+ LASSERT(PageLocked(pga[mapped].pg));
+ LASSERT(mapped == 0 ||
+ pga[mapped].disk_offset > pga[mapped - 1].disk_offset);
+
+ nioptr->offset = pga[mapped].disk_offset;
+ nioptr->len = pga[mapped].count;
+ nioptr->flags = pga[mapped].flag;
+ }
+
+ size[1] = page_count * sizeof(*nioptr);
+ request->rq_replen = lustre_msg_size(2, size);
+
+ rc = ptlrpc_queue_wait(request);
+ if (rc)
+ GOTO(out_req, rc);
+
+ body = lustre_swab_repbuf(request, 0, sizeof(*body),
+ lustre_swab_ost_body);
+ if (body == NULL) {
+ CERROR("Can't unpack body\n");
+ GOTO(out_req, rc = -EPROTO);
+ }
+
+ memcpy(oa, &body->oa, sizeof(*oa));
+
+ swab = lustre_msg_swabbed(request->rq_repmsg);
+ LASSERT_REPSWAB(request, 1);
+ nioptr = lustre_msg_buf(request->rq_repmsg, 1, size[1]);
+ if (!nioptr) {
+ /* nioptr missing or short */
+ GOTO(out_req, rc = -EPROTO);
+ }
+
+ /* actual read */
+ for (mapped = 0; mapped < page_count; mapped++, nioptr++) {
+ struct page *page = pga[mapped].pg;
+ struct buffer_head *bh;
+ kdev_t dev;
+
+ if (swab)
+ lustre_swab_niobuf_remote (nioptr);
+
+ /* got san device associated */
+ LASSERT(exp->exp_obd != NULL);
+ dev = exp->exp_obd->u.cli.cl_sandev;
+
+ /* hole */
+ if (!nioptr->offset) {
+ CDEBUG(D_PAGE, "hole at ino %lu; index %ld\n",
+ page->mapping->host->i_ino,
+ page->index);
+ memset(page_address(page), 0, PAGE_SIZE);
+ continue;
+ }
+
+ if (!page->buffers) {
+ create_empty_buffers(page, dev, PAGE_SIZE);
+ bh = page->buffers;
+
+ clear_bit(BH_New, &bh->b_state);
+ set_bit(BH_Mapped, &bh->b_state);
+ bh->b_blocknr = (unsigned long)nioptr->offset;
+
+ clear_bit(BH_Uptodate, &bh->b_state);
+
+ ll_rw_block(READ, 1, &bh);
+ } else {
+ bh = page->buffers;
+
+ /* if buffer already existed, it must be the
+ * one we mapped before, check it */
+ LASSERT(!test_bit(BH_New, &bh->b_state));
+ LASSERT(test_bit(BH_Mapped, &bh->b_state));
+ LASSERT(bh->b_blocknr == (unsigned long)nioptr->offset);
+
+ /* wait it's io completion */
+ if (test_bit(BH_Lock, &bh->b_state))
+ wait_on_buffer(bh);
+
+ if (!test_bit(BH_Uptodate, &bh->b_state))
+ ll_rw_block(READ, 1, &bh);
+ }
+
+
+ /* must do syncronous write here */
+ wait_on_buffer(bh);
+ if (!buffer_uptodate(bh)) {
+ /* I/O error */
+ rc = -EIO;
+ goto out_req;
+ }
+ }
+
+out_req:
+ ptlrpc_req_finished(request);
+ RETURN(rc);
+}
+
+static int sanosc_brw_write(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *lsm, obd_count page_count,
+ struct brw_page *pga)
+{
+ struct ptlrpc_request *request = NULL;
+ struct ost_body *body;
+ struct niobuf_remote *nioptr;
+ struct obd_ioobj *iooptr;
+ int rc, size[3] = {sizeof(*body)}, mapped = 0;
+ int swab;
+ ENTRY;
+
+ size[1] = sizeof(struct obd_ioobj);
+ size[2] = page_count * sizeof(*nioptr);
+
+ request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
+ OST_SAN_WRITE, 3, size, NULL);
+ if (!request)
+ RETURN(-ENOMEM);
+
+ body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
+ iooptr = lustre_msg_buf(request->rq_reqmsg, 1, sizeof (*iooptr));
+ nioptr = lustre_msg_buf(request->rq_reqmsg, 2,
+ sizeof (*nioptr) * page_count);
+
+ memcpy(&body->oa, oa, sizeof(body->oa));
+
+ obdo_to_ioobj(oa, iooptr);
+ iooptr->ioo_bufcnt = page_count;
+
+ /* pack request */
+ for (mapped = 0; mapped < page_count; mapped++, nioptr++) {
+ LASSERT(PageLocked(pga[mapped].pg));
+ LASSERT(mapped == 0 ||
+ pga[mapped].disk_offset > pga[mapped - 1].disk_offset);
+
+ nioptr->offset = pga[mapped].disk_offset;
+ nioptr->len = pga[mapped].count;
+ nioptr->flags = pga[mapped].flag;
+ }
+
+ size[1] = page_count * sizeof(*nioptr);
+ request->rq_replen = lustre_msg_size(2, size);
+
+ rc = ptlrpc_queue_wait(request);
+ if (rc)
+ GOTO(out_req, rc);
+
+ swab = lustre_msg_swabbed (request->rq_repmsg);
+ LASSERT_REPSWAB (request, 1);
+ nioptr = lustre_msg_buf(request->rq_repmsg, 1, size[1]);
+ if (!nioptr) {
+ CERROR("absent/short niobuf array\n");
+ GOTO(out_req, rc = -EPROTO);
+ }
+
+ /* actual write */
+ for (mapped = 0; mapped < page_count; mapped++, nioptr++) {
+ struct page *page = pga[mapped].pg;
+ struct buffer_head *bh;
+ kdev_t dev;
+
+ if (swab)
+ lustre_swab_niobuf_remote (nioptr);
+
+ /* got san device associated */
+ LASSERT(exp->exp_obd != NULL);
+ dev = exp->exp_obd->u.cli.cl_sandev;
+
+ if (!page->buffers) {
+ create_empty_buffers(page, dev, PAGE_SIZE);
+ } else {
+ /* checking */
+ LASSERT(!test_bit(BH_New, &page->buffers->b_state));
+ LASSERT(test_bit(BH_Mapped, &page->buffers->b_state));
+ LASSERT(page->buffers->b_blocknr ==
+ (unsigned long)nioptr->offset);
+ }
+ bh = page->buffers;
+
+ LASSERT(bh);
+
+ /* if buffer locked, wait it's io completion */
+ if (test_bit(BH_Lock, &bh->b_state))
+ wait_on_buffer(bh);
+
+ clear_bit(BH_New, &bh->b_state);
+ set_bit(BH_Mapped, &bh->b_state);
+
+ /* override the block nr */
+ bh->b_blocknr = (unsigned long)nioptr->offset;
+
+ /* we are about to write it, so set it
+ * uptodate/dirty
+ * page lock should garentee no race condition here */
+ set_bit(BH_Uptodate, &bh->b_state);
+ set_bit(BH_Dirty, &bh->b_state);
+
+ ll_rw_block(WRITE, 1, &bh);
+
+ /* must do syncronous write here */
+ wait_on_buffer(bh);
+ if (!buffer_uptodate(bh) || test_bit(BH_Dirty, &bh->b_state)) {
+ /* I/O error */
+ rc = -EIO;
+ goto out_req;
+ }
+ }
+
+out_req:
+ ptlrpc_req_finished(request);
+ RETURN(rc);
+}
+
+static int sanosc_brw(int cmd, struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *lsm, obd_count page_count,
+ struct brw_page *pga, struct obd_trans_info *oti)
+{
+ ENTRY;
+
+ while (page_count) {
+ obd_count pages_per_brw;
+ int rc;
+
+ if (page_count > PTLRPC_MAX_BRW_PAGES)
+ pages_per_brw = PTLRPC_MAX_BRW_PAGES;
+ else
+ pages_per_brw = page_count;
+
+ if (cmd & OBD_BRW_WRITE)
+ rc = sanosc_brw_write(exp, oa, lsm, pages_per_brw,pga);
+ else
+ rc = sanosc_brw_read(exp, oa, lsm, pages_per_brw, pga);
+
+ if (rc != 0)
+ RETURN(rc);
+
+ page_count -= pages_per_brw;
+ pga += pages_per_brw;
+ }
+ RETURN(0);
+}
+#endif
+#endif
+
+static void osc_set_data_with_check(struct lustre_handle *lockh, void *data)
+{
+ struct ldlm_lock *lock = ldlm_handle2lock(lockh);
+
+ if (lock == NULL) {
+ CERROR("lockh %p, data %p - client evicted?\n", lockh, data);
+ return;
+ }
+
+ l_lock(&lock->l_resource->lr_namespace->ns_lock);
+#ifdef __KERNEL__
+ if (lock->l_ast_data && lock->l_ast_data != data) {
+ struct inode *new_inode = data;
+ struct inode *old_inode = lock->l_ast_data;
+ if (!(old_inode->i_state & I_FREEING))
+ LDLM_ERROR(lock, "inconsistent l_ast_data found");
+ LASSERTF(old_inode->i_state & I_FREEING,
+ "Found existing inode %p/%lu/%u state %lu in lock: "
+ "setting data to %p/%lu/%u\n", old_inode,
+ old_inode->i_ino, old_inode->i_generation,
+ old_inode->i_state,
+ new_inode, new_inode->i_ino, new_inode->i_generation);
+ }
+#endif
+ lock->l_ast_data = data;
+ l_unlock(&lock->l_resource->lr_namespace->ns_lock);
+ LDLM_LOCK_PUT(lock);
+}
+
+static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
+ ldlm_iterator_t replace, void *data)
+{
+ struct ldlm_res_id res_id = { .name = {0} };
+ struct obd_device *obd = class_exp2obd(exp);
+
+ res_id.name[0] = lsm->lsm_object_id;
+ res_id.name[2] = lsm->lsm_object_gr;
+ ldlm_change_cbdata(obd->obd_namespace, &res_id, replace, data);
+ return 0;
+}
+
+static int osc_enqueue(struct obd_export *exp, struct lov_stripe_md *lsm,
+ __u32 type, ldlm_policy_data_t *policy, __u32 mode,
+ int *flags, void *bl_cb, void *cp_cb, void *gl_cb,
+ void *data, __u32 lvb_len, void *lvb_swabber,
+ struct lustre_handle *lockh)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct ldlm_res_id res_id = { .name = {0} };
+ struct ost_lvb lvb;
+ struct ldlm_reply *rep;
+ struct ptlrpc_request *req = NULL;
+ int rc;
+ ENTRY;
+
+ res_id.name[0] = lsm->lsm_object_id;
+ res_id.name[2] = lsm->lsm_object_gr;
+
+ /* Filesystem lock extents are extended to page boundaries so that
+ * dealing with the page cache is a little smoother. */
+ policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
+ policy->l_extent.end |= ~PAGE_MASK;
+
+ if (lsm->lsm_oinfo->loi_kms_valid == 0)
+ goto no_match;
+
+ /* Next, search for already existing extent locks that will cover us */
+ rc = ldlm_lock_match(obd->obd_namespace, 0, &res_id, type, policy, mode,
+ lockh);
+ if (rc == 1) {
+ if (ptlrpcs_check_cred(obd->u.cli.cl_import)) {
+ /* return immediately if no credential held */
+ ldlm_lock_decref(lockh, mode);
+ RETURN(-EACCES);
+ }
+
+ osc_set_data_with_check(lockh, data);
+ if (*flags & LDLM_FL_HAS_INTENT) {
+ /* I would like to be able to ASSERT here that rss <=
+ * kms, but I can't, for reasons which are explained in
+ * lov_enqueue() */
+ }
+ /* We already have a lock, and it's referenced */
+ RETURN(ELDLM_OK);
+ }
+
+ /* If we're trying to read, we also search for an existing PW lock. The
+ * VFS and page cache already protect us locally, so lots of readers/
+ * writers can share a single PW lock.
+ *
* There are problems with conversion deadlocks, so instead of
* converting a read lock to a write lock, we'll just enqueue a new
* one.
* locks out from other users right now, too. */
if (mode == LCK_PR) {
- rc = ldlm_lock_match(obddev->obd_namespace, res_id, type,
- extent, sizeof(extent), LCK_PW, lockh);
+ rc = ldlm_lock_match(obd->obd_namespace, 0, &res_id, type,
+ policy, LCK_PW, lockh);
if (rc == 1) {
+ if (ptlrpcs_check_cred(obd->u.cli.cl_import)) {
+ /* return immediately if no credential held */
+ ldlm_lock_decref(lockh, LCK_PW);
+ RETURN(-EACCES);
+ }
+
/* FIXME: This is not incredibly elegant, but it might
* be more elegant than adding another parameter to
* lock_match. I want a second opinion. */
ldlm_lock_addref(lockh, LCK_PR);
ldlm_lock_decref(lockh, LCK_PW);
-
+ osc_set_data_with_check(lockh, data);
RETURN(ELDLM_OK);
}
}
+ if (mode == LCK_PW) {
+ rc = ldlm_lock_match(obd->obd_namespace, 0, &res_id, type,
+ policy, LCK_PR, lockh);
+ if (rc == 1) {
+ rc = ldlm_cli_convert(lockh, mode, flags);
+ if (!rc) {
+ /* Update readers/writers accounting */
+ ldlm_lock_addref(lockh, LCK_PW);
+ ldlm_lock_decref(lockh, LCK_PR);
+ osc_set_data_with_check(lockh, data);
+ RETURN(ELDLM_OK);
+ }
+ /* If the conversion failed, we need to drop refcount
+ on matched lock before we get new one */
+ /* XXX Won't it save us some efforts if we cancel PR
+ lock here? We are going to take PW lock anyway and it
+ will invalidate PR lock */
+ ldlm_lock_decref(lockh, LCK_PR);
+ if (rc != EDEADLOCK) {
+ RETURN(rc);
+ }
+ }
+ }
+
+ if (mode == LCK_PW) {
+ rc = ldlm_lock_match(obd->obd_namespace, 0, &res_id, type,
+ policy, LCK_PR, lockh);
+ if (rc == 1) {
+ rc = ldlm_cli_convert(lockh, mode, flags);
+ if (!rc) {
+ /* Update readers/writers accounting */
+ ldlm_lock_addref(lockh, LCK_PW);
+ ldlm_lock_decref(lockh, LCK_PR);
+ osc_set_data_with_check(lockh, data);
+ RETURN(ELDLM_OK);
+ }
+ /* If the conversion failed, we need to drop refcount
+ on matched lock before we get new one */
+ /* XXX Won't it save us some efforts if we cancel PR
+ lock here? We are going to take PW lock anyway and it
+ will invalidate PR lock */
+ ldlm_lock_decref(lockh, LCK_PR);
+ if (rc != EDEADLOCK) {
+ RETURN(rc);
+ }
+ }
+ }
+
+ no_match:
+ if (*flags & LDLM_FL_HAS_INTENT) {
+ int size[2] = {0, sizeof(struct ldlm_request)};
+
+ req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_DLM_VERSION,
+ LDLM_ENQUEUE, 2, size, NULL);
+ if (req == NULL)
+ RETURN(-ENOMEM);
+
+ size[0] = sizeof(*rep);
+ size[1] = sizeof(lvb);
+ req->rq_replen = lustre_msg_size(2, size);
+ }
+ rc = ldlm_cli_enqueue(exp, req, obd->obd_namespace, res_id, type,
+ policy, mode, flags, bl_cb, cp_cb, gl_cb, data,
+ &lvb, sizeof(lvb), lustre_swab_ost_lvb, lockh);
+ if (req != NULL) {
+ if (rc == ELDLM_LOCK_ABORTED) {
+ /* swabbed by ldlm_cli_enqueue() */
+ LASSERT_REPSWABBED(req, 0);
+ rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*rep));
+ LASSERT(rep != NULL);
+ if (rep->lock_policy_res1)
+ rc = rep->lock_policy_res1;
+ }
+ ptlrpc_req_finished(req);
+ }
- rc = ldlm_cli_enqueue(connh, NULL, obddev->obd_namespace, parent_lock,
- res_id, type, extent, sizeof(extent), mode, flags,
- ldlm_completion_ast, callback, data, datalen,
- lockh);
+ if ((*flags & LDLM_FL_HAS_INTENT && rc == ELDLM_LOCK_ABORTED) || !rc) {
+ CDEBUG(D_INODE, "received kms == "LPU64", blocks == "LPU64"\n",
+ lvb.lvb_size, lvb.lvb_blocks);
+ lsm->lsm_oinfo->loi_rss = lvb.lvb_size;
+ lsm->lsm_oinfo->loi_blocks = lvb.lvb_blocks;
+ }
+
+ RETURN(rc);
+}
+
+static int osc_match(struct obd_export *exp, struct lov_stripe_md *lsm,
+ __u32 type, ldlm_policy_data_t *policy, __u32 mode,
+ int *flags, void *data, struct lustre_handle *lockh)
+{
+ struct ldlm_res_id res_id = { .name = {0} };
+ struct obd_device *obd = exp->exp_obd;
+ int rc;
+ ENTRY;
+
+ res_id.name[0] = lsm->lsm_object_id;
+ res_id.name[2] = lsm->lsm_object_gr;
+
+ OBD_FAIL_RETURN(OBD_FAIL_OSC_MATCH, -EIO);
+
+ /* Filesystem lock extents are extended to page boundaries so that
+ * dealing with the page cache is a little smoother */
+ policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
+ policy->l_extent.end |= ~PAGE_MASK;
+
+ /* Next, search for already existing extent locks that will cover us */
+ rc = ldlm_lock_match(obd->obd_namespace, *flags, &res_id, type,
+ policy, mode, lockh);
+ if (rc) {
+ // if (!(*flags & LDLM_FL_TEST_LOCK))
+ osc_set_data_with_check(lockh, data);
+ RETURN(rc);
+ }
+ /* If we're trying to read, we also search for an existing PW lock. The
+ * VFS and page cache already protect us locally, so lots of readers/
+ * writers can share a single PW lock. */
+ if (mode == LCK_PR) {
+ rc = ldlm_lock_match(obd->obd_namespace, *flags, &res_id, type,
+ policy, LCK_PW, lockh);
+ if (rc == 1 && !(*flags & LDLM_FL_TEST_LOCK)) {
+ /* FIXME: This is not incredibly elegant, but it might
+ * be more elegant than adding another parameter to
+ * lock_match. I want a second opinion. */
+ osc_set_data_with_check(lockh, data);
+ ldlm_lock_addref(lockh, LCK_PR);
+ ldlm_lock_decref(lockh, LCK_PW);
+ }
+ }
RETURN(rc);
}
-static int osc_cancel(struct lustre_handle *oconn, struct lov_stripe_md *md,
+static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
__u32 mode, struct lustre_handle *lockh)
{
ENTRY;
- ldlm_lock_decref(lockh, mode);
+ if (mode == LCK_GROUP)
+ ldlm_lock_decref_and_cancel(lockh, mode);
+ else
+ ldlm_lock_decref(lockh, mode);
RETURN(0);
}
-static int osc_cancel_unused(struct lustre_handle *connh,
- struct lov_stripe_md *lsm, int flags)
+static int osc_cancel_unused(struct obd_export *exp,
+ struct lov_stripe_md *lsm,
+ int flags, void *opaque)
{
- struct obd_device *obddev = class_conn2obd(connh);
- __u64 res_id[RES_NAME_SIZE] = { lsm->lsm_object_id };
+ struct obd_device *obd = class_exp2obd(exp);
+ struct ldlm_res_id res_id = { .name = {0} }, *resp = NULL;
+
+ if (lsm != NULL) {
+ res_id.name[0] = lsm->lsm_object_id;
+ res_id.name[2] = lsm->lsm_object_gr;
+ resp = &res_id;
+ }
- return ldlm_cli_cancel_unused(obddev->obd_namespace, res_id, flags);
+ return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
}
-static int osc_statfs(struct lustre_handle *conn, struct obd_statfs *osfs)
+static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
+ unsigned long max_age)
{
+ struct obd_statfs *msfs;
struct ptlrpc_request *request;
int rc, size = sizeof(*osfs);
ENTRY;
- request = ptlrpc_prep_req(class_conn2cliimp(conn), OST_STATFS, 0, NULL,
- NULL);
+ /* We could possibly pass max_age in the request (as an absolute
+ * timestamp or a "seconds.usec ago") so the target can avoid doing
+ * extra calls into the filesystem if that isn't necessary (e.g.
+ * during mount that would help a bit). Having relative timestamps
+ * is not so great if request processing is slow, while absolute
+ * timestamps are not ideal because they need time synchronization. */
+ request = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_OBD_VERSION,
+ OST_STATFS, 0, NULL, NULL);
if (!request)
RETURN(-ENOMEM);
request->rq_replen = lustre_msg_size(1, &size);
+ request->rq_request_portal = OST_CREATE_PORTAL; //XXX FIXME bug 249
rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
- if (rc) {
- CERROR("%s failed: rc = %d\n", __FUNCTION__, rc);
+ if (rc)
GOTO(out, rc);
+
+ msfs = lustre_swab_repbuf(request, 0, sizeof(*msfs),
+ lustre_swab_obd_statfs);
+ if (msfs == NULL) {
+ CERROR("Can't unpack obd_statfs\n");
+ GOTO(out, rc = -EPROTO);
}
- obd_statfs_unpack(osfs, lustre_msg_buf(request->rq_repmsg, 0));
+ memcpy(osfs, msfs, sizeof(*osfs));
EXIT;
out:
return rc;
}
-static int osc_iocontrol(long cmd, struct lustre_handle *conn, int len,
+/* Retrieve object striping information.
+ *
+ * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
+ * the maximum number of OST indices which will fit in the user buffer.
+ * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
+ */
+static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
+{
+ struct lov_user_md lum, *lumk;
+ int rc, lum_size;
+ ENTRY;
+
+ if (!lsm)
+ RETURN(-ENODATA);
+
+ rc = copy_from_user(&lum, lump, sizeof(lum));
+ if (rc)
+ RETURN(-EFAULT);
+
+ if (lum.lmm_magic != LOV_USER_MAGIC)
+ RETURN(-EINVAL);
+
+ if (lum.lmm_stripe_count > 0) {
+ lum_size = sizeof(lum) + sizeof(lum.lmm_objects[0]);
+ OBD_ALLOC(lumk, lum_size);
+ if (!lumk)
+ RETURN(-ENOMEM);
+
+ lumk->lmm_objects[0].l_object_id = lsm->lsm_object_id;
+ lumk->lmm_objects[0].l_object_gr = lsm->lsm_object_gr;
+ } else {
+ lum_size = sizeof(lum);
+ lumk = &lum;
+ }
+
+ lumk->lmm_object_id = lsm->lsm_object_id;
+ lumk->lmm_object_gr = lsm->lsm_object_gr;
+ lumk->lmm_stripe_count = 1;
+
+ if (copy_to_user(lump, lumk, lum_size))
+ rc = -EFAULT;
+
+ if (lumk != &lum)
+ OBD_FREE(lumk, lum_size);
+
+ RETURN(rc);
+}
+
+static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
void *karg, void *uarg)
{
- struct obd_device *obddev = class_conn2obd(conn);
+ struct obd_device *obd = exp->exp_obd;
struct obd_ioctl_data *data = karg;
int err = 0;
ENTRY;
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ MOD_INC_USE_COUNT;
+#else
+ if (!try_module_get(THIS_MODULE)) {
+ CERROR("Can't get module. Is it alive?");
+ return -EINVAL;
+ }
+#endif
switch (cmd) {
- case IOC_LDLM_TEST: {
- err = ldlm_test(obddev, conn);
- CERROR("-- done err %d\n", err);
- GOTO(out, err);
- }
- case IOC_LDLM_REGRESS_START: {
- unsigned int numthreads = 1;
- unsigned int numheld = 10;
- unsigned int numres = 10;
- unsigned int numext = 10;
- char *parse;
-
- if (data->ioc_inllen1) {
- parse = data->ioc_inlbuf1;
- if (*parse != '\0') {
- while(isspace(*parse)) parse++;
- numthreads = simple_strtoul(parse, &parse, 0);
- while(isspace(*parse)) parse++;
- }
- if (*parse != '\0') {
- while(isspace(*parse)) parse++;
- numheld = simple_strtoul(parse, &parse, 0);
- while(isspace(*parse)) parse++;
- }
- if (*parse != '\0') {
- while(isspace(*parse)) parse++;
- numres = simple_strtoul(parse, &parse, 0);
- while(isspace(*parse)) parse++;
- }
- if (*parse != '\0') {
- while(isspace(*parse)) parse++;
- numext = simple_strtoul(parse, &parse, 0);
- while(isspace(*parse)) parse++;
- }
- }
-
- err = ldlm_regression_start(obddev, conn, numthreads,
- numheld, numres, numext);
-
- CERROR("-- done err %d\n", err);
- GOTO(out, err);
- }
- case IOC_LDLM_REGRESS_STOP: {
- err = ldlm_regression_stop();
- CERROR("-- done err %d\n", err);
- GOTO(out, err);
- }
- case IOC_OSC_REGISTER_LOV: {
- if (obddev->u.cli.cl_containing_lov)
- GOTO(out, err = -EALREADY);
- obddev->u.cli.cl_containing_lov = (struct obd_device *)karg;
- GOTO(out, err);
- }
case OBD_IOC_LOV_GET_CONFIG: {
char *buf;
struct lov_desc *desc;
- obd_uuid_t *uuidp;
+ struct obd_uuid uuid;
buf = NULL;
len = 0;
GOTO(out, err = -EINVAL);
}
- if (data->ioc_inllen2 < sizeof(*uuidp)) {
+ if (data->ioc_inllen2 < sizeof(uuid)) {
+ OBD_FREE(buf, len);
+ GOTO(out, err = -EINVAL);
+ }
+
+ if (data->ioc_inllen3 < sizeof(__u32)) {
OBD_FREE(buf, len);
GOTO(out, err = -EINVAL);
}
desc->ld_default_stripe_size = 0;
desc->ld_default_stripe_offset = 0;
desc->ld_pattern = 0;
- memcpy(desc->ld_uuid, obddev->obd_uuid, sizeof(*uuidp));
-
- uuidp = (obd_uuid_t *)data->ioc_inlbuf2;
- memcpy(uuidp, obddev->obd_uuid, sizeof(*uuidp));
+ memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
+ memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
+ *((__u32 *)data->ioc_inlbuf3) = 1;
err = copy_to_user((void *)uarg, buf, len);
if (err)
err = -EFAULT;
- OBD_FREE(buf, len);
+ obd_ioctl_freedata(buf, len);
GOTO(out, err);
}
+ case LL_IOC_LOV_SETSTRIPE:
+ err = obd_alloc_memmd(exp, karg);
+ if (err > 0)
+ err = 0;
+ GOTO(out, err);
+ case LL_IOC_LOV_GETSTRIPE:
+ err = osc_getstripe(karg, uarg);
+ GOTO(out, err);
+ case OBD_IOC_CLIENT_RECOVER:
+ err = ptlrpc_recover_import(obd->u.cli.cl_import,
+ data->ioc_inlbuf1);
+ if (err > 0)
+ err = 0;
+ GOTO(out, err);
+ case IOC_OSC_SET_ACTIVE:
+ err = ptlrpc_set_import_active(obd->u.cli.cl_import,
+ data->ioc_offset);
+ GOTO(out, err);
+ case IOC_OSC_CTL_RECOVERY:
+ err = ptlrpc_import_control_recovery(obd->u.cli.cl_import,
+ data->ioc_offset);
+ GOTO(out, err);
default:
+ CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n", cmd, current->comm);
GOTO(out, err = -ENOTTY);
}
out:
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ MOD_DEC_USE_COUNT;
+#else
+ module_put(THIS_MODULE);
+#endif
return err;
}
+static int osc_get_info(struct obd_export *exp, __u32 keylen,
+ void *key, __u32 *vallen, void *val)
+{
+ ENTRY;
+ if (!vallen || !val)
+ RETURN(-EFAULT);
+
+ if (keylen > strlen("lock_to_stripe") &&
+ strcmp(key, "lock_to_stripe") == 0) {
+ __u32 *stripe = val;
+ *vallen = sizeof(*stripe);
+ *stripe = 0;
+ RETURN(0);
+ } else if (keylen >= strlen("last_id") && strcmp(key, "last_id") == 0) {
+ struct ptlrpc_request *req;
+ obd_id *reply;
+ char *bufs[1] = {key};
+ int rc;
+ req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
+ OST_GET_INFO, 1, (int *)&keylen, bufs);
+ if (req == NULL)
+ RETURN(-ENOMEM);
+
+ req->rq_replen = lustre_msg_size(1, (int *)vallen);
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ GOTO(out, rc);
+
+ reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
+ lustre_swab_ost_last_id);
+ if (reply == NULL) {
+ CERROR("Can't unpack OST last ID\n");
+ GOTO(out, rc = -EPROTO);
+ }
+ *((obd_id *)val) = *reply;
+ out:
+ ptlrpc_req_finished(req);
+ RETURN(rc);
+ }
+ RETURN(-EPROTO);
+}
+
+static int osc_set_info(struct obd_export *exp, obd_count keylen,
+ void *key, obd_count vallen, void *val)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct obd_import *imp = class_exp2cliimp(exp);
+ struct llog_ctxt *ctxt;
+ int rc = 0;
+ ENTRY;
+
+ if (keylen == strlen("unlinked") &&
+ memcmp(key, "unlinked", keylen) == 0) {
+ struct osc_creator *oscc = &obd->u.cli.cl_oscc;
+ spin_lock(&oscc->oscc_lock);
+ oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
+ spin_unlock(&oscc->oscc_lock);
+ RETURN(0);
+ }
+ if (keylen == strlen("unrecovery") &&
+ memcmp(key, "unrecovery", keylen) == 0) {
+ struct osc_creator *oscc = &obd->u.cli.cl_oscc;
+ spin_lock(&oscc->oscc_lock);
+ oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
+ spin_unlock(&oscc->oscc_lock);
+ RETURN(0);
+ }
+ if (keylen == strlen("initial_recov") &&
+ memcmp(key, "initial_recov", strlen("initial_recov")) == 0) {
+ struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
+ if (vallen != sizeof(int))
+ RETURN(-EINVAL);
+ imp->imp_initial_recov = *(int *)val;
+ CDEBUG(D_HA, "%s: set imp_no_init_recov = %d\n",
+ exp->exp_obd->obd_name,
+ imp->imp_initial_recov);
+ RETURN(0);
+ }
+
+ if (keylen == strlen("async") &&
+ memcmp(key, "async", keylen) == 0) {
+ struct client_obd *cl = &obd->u.cli;
+ if (vallen != sizeof(int))
+ RETURN(-EINVAL);
+ cl->cl_async = *(int *)val;
+ CDEBUG(D_HA, "%s: set async = %d\n",
+ obd->obd_name, cl->cl_async);
+ RETURN(0);
+ }
+
+ if (keylen == strlen("sec") &&
+ memcmp(key, "sec", keylen) == 0) {
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+
+ if (vallen == strlen("null") &&
+ memcmp(val, "null", vallen) == 0) {
+ cli->cl_sec_flavor = PTLRPC_SEC_NULL;
+ cli->cl_sec_subflavor = 0;
+ RETURN(0);
+ }
+ if (vallen == strlen("krb5i") &&
+ memcmp(val, "krb5i", vallen) == 0) {
+ cli->cl_sec_flavor = PTLRPC_SEC_GSS;
+ cli->cl_sec_subflavor = PTLRPC_SEC_GSS_KRB5I;
+ RETURN(0);
+ }
+ if (vallen == strlen("krb5p") &&
+ memcmp(val, "krb5p", vallen) == 0) {
+ cli->cl_sec_flavor = PTLRPC_SEC_GSS;
+ cli->cl_sec_subflavor = PTLRPC_SEC_GSS_KRB5P;
+ RETURN(0);
+ }
+ CERROR("unrecognized security type %s\n", (char*) val);
+ RETURN(-EINVAL);
+ }
+
+ if (keylen == strlen("flush_cred") &&
+ memcmp(key, "flush_cred", keylen) == 0) {
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+
+ if (cli->cl_import)
+ ptlrpcs_import_flush_creds(cli->cl_import,
+ *((uid_t *) val));
+ RETURN(0);
+ }
+
+ if (keylen < strlen("mds_conn") ||
+ memcmp(key, "mds_conn", keylen) != 0)
+ RETURN(-EINVAL);
+
+ ctxt = llog_get_context(&exp->exp_obd->obd_llogs,
+ LLOG_UNLINK_ORIG_CTXT);
+ if (ctxt) {
+ if (rc == 0)
+ rc = llog_initiator_connect(ctxt);
+ else
+ CERROR("cannot establish the connect for "
+ "ctxt %p: %d\n", ctxt, rc);
+ }
+
+ imp->imp_server_timeout = 1;
+ CDEBUG(D_HA, "pinging OST %s\n", imp->imp_target_uuid.uuid);
+ imp->imp_pingable = 1;
+
+ RETURN(rc);
+}
+
+
+static struct llog_operations osc_size_repl_logops = {
+ lop_cancel: llog_obd_repl_cancel
+};
+
+static struct llog_operations osc_unlink_orig_logops;
+
+static int osc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
+ struct obd_device *tgt, int count,
+ struct llog_catid *catid)
+{
+ int rc;
+ ENTRY;
+
+ osc_unlink_orig_logops = llog_lvfs_ops;
+ osc_unlink_orig_logops.lop_setup = llog_obd_origin_setup;
+ osc_unlink_orig_logops.lop_cleanup = llog_catalog_cleanup;
+ osc_unlink_orig_logops.lop_add = llog_catalog_add;
+ osc_unlink_orig_logops.lop_connect = llog_origin_connect;
+
+ rc = obd_llog_setup(obd, llogs, LLOG_UNLINK_ORIG_CTXT, tgt, count,
+ &catid->lci_logid, &osc_unlink_orig_logops);
+ if (rc)
+ RETURN(rc);
+
+ rc = obd_llog_setup(obd, llogs, LLOG_SIZE_REPL_CTXT, tgt, count, NULL,
+ &osc_size_repl_logops);
+ RETURN(rc);
+}
+
+static int osc_llog_finish(struct obd_device *obd,
+ struct obd_llogs *llogs, int count)
+{
+ int rc;
+ ENTRY;
+
+ rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_UNLINK_ORIG_CTXT));
+ if (rc)
+ RETURN(rc);
+
+ rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_SIZE_REPL_CTXT));
+ RETURN(rc);
+}
+
+static int osc_connect(struct lustre_handle *exph,
+ struct obd_device *obd, struct obd_uuid *cluuid,
+ struct obd_connect_data *data,
+ unsigned long connect_flags)
+{
+ int rc;
+ ENTRY;
+ rc = client_connect_import(exph, obd, cluuid, data, connect_flags);
+ RETURN(rc);
+}
+
+static int osc_disconnect(struct obd_export *exp, unsigned long flags)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct llog_ctxt *ctxt;
+ int rc;
+ ENTRY;
+
+ ctxt = llog_get_context(&obd->obd_llogs, LLOG_SIZE_REPL_CTXT);
+ if (obd->u.cli.cl_conn_count == 1)
+ /* flush any remaining cancel messages out to the target */
+ llog_sync(ctxt, exp);
+
+ rc = client_disconnect_export(exp, flags);
+ RETURN(rc);
+}
+
+static int osc_import_event(struct obd_device *obd,
+ struct obd_import *imp,
+ enum obd_import_event event)
+{
+ struct client_obd *cli;
+ int rc = 0;
+
+ LASSERT(imp->imp_obd == obd);
+
+ switch (event) {
+ case IMP_EVENT_DISCON: {
+ /* Only do this on the MDS OSC's */
+ if (imp->imp_server_timeout) {
+ struct osc_creator *oscc = &obd->u.cli.cl_oscc;
+
+ spin_lock(&oscc->oscc_lock);
+ oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
+ spin_unlock(&oscc->oscc_lock);
+ }
+ break;
+ }
+ case IMP_EVENT_INACTIVE: {
+ if (obd->obd_observer)
+ rc = obd_notify(obd->obd_observer, obd, 0, 0);
+ break;
+ }
+ case IMP_EVENT_INVALIDATE: {
+ struct ldlm_namespace *ns = obd->obd_namespace;
+
+ /* Reset grants */
+ cli = &obd->u.cli;
+ spin_lock(&cli->cl_loi_list_lock);
+ cli->cl_avail_grant = 0;
+ cli->cl_lost_grant = 0;
+ /* all pages go to failing rpcs due to the invalid import */
+ osc_check_rpcs(cli);
+ spin_unlock(&cli->cl_loi_list_lock);
+
+ ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
+
+ break;
+ }
+ case IMP_EVENT_ACTIVE: {
+ /* Only do this on the MDS OSC's */
+ if (imp->imp_server_timeout) {
+ struct osc_creator *oscc = &obd->u.cli.cl_oscc;
+
+ spin_lock(&oscc->oscc_lock);
+ oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
+ spin_unlock(&oscc->oscc_lock);
+ }
+
+ if (obd->obd_observer)
+ rc = obd_notify(obd->obd_observer, obd, 1, 0);
+ break;
+ }
+ default:
+ CERROR("Unknown import event %d\n", event);
+ LBUG();
+ }
+ RETURN(rc);
+}
+
+static int osc_attach(struct obd_device *dev, obd_count len, void *data)
+{
+ struct lprocfs_static_vars lvars;
+ int rc;
+ ENTRY;
+
+ lprocfs_init_vars(osc,&lvars);
+ rc = lprocfs_obd_attach(dev, lvars.obd_vars);
+ if (rc < 0)
+ RETURN(rc);
+
+ rc = lproc_osc_attach_seqstat(dev);
+ if (rc < 0) {
+ lprocfs_obd_detach(dev);
+ RETURN(rc);
+ }
+
+ ptlrpc_lprocfs_register_obd(dev);
+ RETURN(0);
+}
+
+static int osc_detach(struct obd_device *dev)
+{
+ ptlrpc_lprocfs_unregister_obd(dev);
+ return lprocfs_obd_detach(dev);
+}
+
+static int osc_setup(struct obd_device *obd, obd_count len, void *buf)
+{
+ int rc;
+ ENTRY;
+ rc = ptlrpcd_addref();
+ if (rc)
+ RETURN(rc);
+
+ rc = client_obd_setup(obd, len, buf);
+ if (rc)
+ ptlrpcd_decref();
+ else
+ oscc_init(obd);
+
+ RETURN(rc);
+}
+
+static int osc_cleanup(struct obd_device *obd, int flags)
+{
+ struct osc_creator *oscc = &obd->u.cli.cl_oscc;
+ int rc;
+
+ rc = ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
+ LDLM_FL_CONFIG_CHANGE, NULL);
+ if (rc)
+ RETURN(rc);
+
+ spin_lock(&oscc->oscc_lock);
+ oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
+ oscc->oscc_flags |= OSCC_FLAG_EXITING;
+ spin_unlock(&oscc->oscc_lock);
+
+ rc = client_obd_cleanup(obd, flags);
+ ptlrpcd_decref();
+ RETURN(rc);
+}
+
struct obd_ops osc_obd_ops = {
- o_attach: osc_attach,
- o_detach: osc_detach,
- o_setup: client_obd_setup,
- o_cleanup: client_obd_cleanup,
- o_connect: client_obd_connect,
- o_disconnect: client_obd_disconnect,
- o_statfs: osc_statfs,
- o_packmd: osc_packmd,
- o_unpackmd: osc_unpackmd,
- o_create: osc_create,
- o_destroy: osc_destroy,
- o_getattr: osc_getattr,
- o_setattr: osc_setattr,
- o_open: osc_open,
- o_close: osc_close,
- o_brw: osc_brw,
- o_punch: osc_punch,
- o_enqueue: osc_enqueue,
- o_cancel: osc_cancel,
- o_cancel_unused: osc_cancel_unused,
- o_iocontrol: osc_iocontrol
+ .o_owner = THIS_MODULE,
+ .o_attach = osc_attach,
+ .o_detach = osc_detach,
+ .o_setup = osc_setup,
+ .o_cleanup = osc_cleanup,
+ .o_add_conn = client_import_add_conn,
+ .o_del_conn = client_import_del_conn,
+ .o_connect = osc_connect,
+ .o_disconnect = osc_disconnect,
+ .o_statfs = osc_statfs,
+ .o_packmd = osc_packmd,
+ .o_unpackmd = osc_unpackmd,
+ .o_create = osc_create,
+ .o_destroy = osc_destroy,
+ .o_getattr = osc_getattr,
+ .o_getattr_async = osc_getattr_async,
+ .o_setattr = osc_setattr,
+ .o_brw = osc_brw,
+ .o_brw_async = osc_brw_async,
+ .o_prep_async_page = osc_prep_async_page,
+ .o_queue_async_io = osc_queue_async_io,
+ .o_set_async_flags = osc_set_async_flags,
+ .o_queue_group_io = osc_queue_group_io,
+ .o_trigger_group_io = osc_trigger_group_io,
+ .o_teardown_async_page = osc_teardown_async_page,
+ .o_punch = osc_punch,
+ .o_sync = osc_sync,
+ .o_enqueue = osc_enqueue,
+ .o_match = osc_match,
+ .o_change_cbdata = osc_change_cbdata,
+ .o_cancel = osc_cancel,
+ .o_cancel_unused = osc_cancel_unused,
+ .o_iocontrol = osc_iocontrol,
+ .o_get_info = osc_get_info,
+ .o_set_info = osc_set_info,
+ .o_import_event = osc_import_event,
+ .o_llog_init = osc_llog_init,
+ .o_llog_finish = osc_llog_finish,
+};
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+struct obd_ops sanosc_obd_ops = {
+ .o_owner = THIS_MODULE,
+ .o_attach = osc_attach,
+ .o_detach = osc_detach,
+ .o_cleanup = client_obd_cleanup,
+ .o_add_conn = client_import_add_conn,
+ .o_del_conn = client_import_del_conn,
+ .o_connect = osc_connect,
+ .o_disconnect = client_disconnect_export,
+ .o_statfs = osc_statfs,
+ .o_packmd = osc_packmd,
+ .o_unpackmd = osc_unpackmd,
+ .o_create = osc_real_create,
+ .o_destroy = osc_destroy,
+ .o_getattr = osc_getattr,
+ .o_getattr_async = osc_getattr_async,
+ .o_setattr = osc_setattr,
+ .o_setup = client_sanobd_setup,
+ .o_brw = sanosc_brw,
+ .o_punch = osc_punch,
+ .o_sync = osc_sync,
+ .o_enqueue = osc_enqueue,
+ .o_match = osc_match,
+ .o_change_cbdata = osc_change_cbdata,
+ .o_cancel = osc_cancel,
+ .o_cancel_unused = osc_cancel_unused,
+ .o_iocontrol = osc_iocontrol,
+ .o_import_event = osc_import_event,
+ .o_llog_init = osc_llog_init,
+ .o_llog_finish = osc_llog_finish,
};
+#endif
-static int __init osc_init(void)
+int __init osc_init(void)
{
- RETURN(class_register_type(&osc_obd_ops, status_class_var,
- LUSTRE_OSC_NAME));
+ struct lprocfs_static_vars lvars;
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ struct lprocfs_static_vars sanlvars;
+#endif
+ int rc;
+ ENTRY;
+
+ lprocfs_init_vars(osc, &lvars);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ lprocfs_init_vars(osc, &sanlvars);
+#endif
+
+ rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
+ LUSTRE_OSC_NAME);
+ if (rc)
+ RETURN(rc);
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ rc = class_register_type(&sanosc_obd_ops, NULL, sanlvars.module_vars,
+ LUSTRE_SANOSC_NAME);
+ if (rc)
+ class_unregister_type(LUSTRE_OSC_NAME);
+#endif
+
+ RETURN(rc);
}
-static void __exit osc_exit(void)
+#ifdef __KERNEL__
+static void /*__exit*/ osc_exit(void)
{
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ class_unregister_type(LUSTRE_SANOSC_NAME);
+#endif
class_unregister_type(LUSTRE_OSC_NAME);
}
MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre Object Storage Client (OSC) v1.0");
+MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
MODULE_LICENSE("GPL");
module_init(osc_init);
module_exit(osc_exit);
+#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff