-/*
- * linux/fs/ext2_obd/ext2_obd.c
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (C) 2001 Cluster File Systems, Inc.
+ * Copyright (c) 2001-2003 Cluster File Systems, Inc.
+ * Author: Peter Braam <braam@clusterfs.com>
+ * Author: Andreas Dilger <adilger@clusterfs.com>
*
- * This code is issued under the GNU General Public License.
- * See the file COPYING in this distribution
+ * This file is part of Lustre, http://www.lustre.org.
*
- * by Peter Braam <braam@clusterfs.com>
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define EXPORT_SYMTAB
#include <linux/version.h>
#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
#include <linux/fs.h>
#include <linux/stat.h>
-#include <linux/locks.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
#include <linux/ext2_fs.h>
#include <linux/quotaops.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
#include <asm/unistd.h>
#define DEBUG_SUBSYSTEM S_ECHO
#include <linux/obd_support.h>
#include <linux/obd_class.h>
#include <linux/obd_echo.h>
+#include <linux/lustre_debug.h>
+#include <linux/lustre_dlm.h>
+#include <linux/lprocfs_status.h>
+
+#define ECHO_INIT_OBJID 0x1000000000000000ULL
+#define ECHO_HANDLE_MAGIC 0xabcd0123fedc9876ULL
+
+#define ECHO_OBJECT0_NPAGES 16
+static struct page *echo_object0_pages[ECHO_OBJECT0_NPAGES];
+
+/* should be generic per-obd stats... */
+struct xprocfs_io_stat {
+ __u64 st_read_bytes;
+ __u64 st_read_reqs;
+ __u64 st_write_bytes;
+ __u64 st_write_reqs;
+ __u64 st_getattr_reqs;
+ __u64 st_setattr_reqs;
+ __u64 st_create_reqs;
+ __u64 st_destroy_reqs;
+ __u64 st_statfs_reqs;
+ __u64 st_open_reqs;
+ __u64 st_close_reqs;
+ __u64 st_punch_reqs;
+};
+
+static struct xprocfs_io_stat xprocfs_iostats[NR_CPUS];
+static struct proc_dir_entry *xprocfs_dir;
+
+#define XPROCFS_BUMP_MYCPU_IOSTAT(field, count) \
+do { \
+ xprocfs_iostats[smp_processor_id()].field += (count); \
+} while (0)
+
+#define DECLARE_XPROCFS_SUM_STAT(field) \
+static long long \
+xprocfs_sum_##field (void) \
+{ \
+ long long stat = 0; \
+ int i; \
+ \
+ for (i = 0; i < smp_num_cpus; i++) \
+ stat += xprocfs_iostats[i].field; \
+ return (stat); \
+}
+
+DECLARE_XPROCFS_SUM_STAT (st_read_bytes)
+DECLARE_XPROCFS_SUM_STAT (st_read_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_write_bytes)
+DECLARE_XPROCFS_SUM_STAT (st_write_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_getattr_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_setattr_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_create_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_destroy_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_statfs_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_open_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_close_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_punch_reqs)
+
+static int
+xprocfs_rd_stat (char *page, char **start, off_t off, int count,
+ int *eof, void *data)
+{
+ long long (*fn)(void) = (long long(*)(void))data;
+ int len;
+
+ *eof = 1;
+ if (off != 0)
+ return (0);
+
+ len = snprintf (page, count, "%Ld\n", fn());
+ *start = page;
+ return (len);
+}
+
+
+static void
+xprocfs_add_stat(char *name, long long (*fn)(void))
+{
+ struct proc_dir_entry *entry;
+
+ entry = create_proc_entry (name, S_IFREG|S_IRUGO, xprocfs_dir);
+ if (entry == NULL) {
+ CERROR ("Can't add procfs stat %s\n", name);
+ return;
+ }
+
+ entry->data = fn;
+ entry->read_proc = xprocfs_rd_stat;
+ entry->write_proc = NULL;
+}
+
+static void
+xprocfs_init (char *name)
+{
+ char dirname[64];
+
+ snprintf (dirname, sizeof (dirname), "sys/%s", name);
+
+ xprocfs_dir = proc_mkdir (dirname, NULL);
+ if (xprocfs_dir == NULL) {
+ CERROR ("Can't make dir\n");
+ return;
+ }
+
+ xprocfs_add_stat ("read_bytes", xprocfs_sum_st_read_bytes);
+ xprocfs_add_stat ("read_reqs", xprocfs_sum_st_read_reqs);
+ xprocfs_add_stat ("write_bytes", xprocfs_sum_st_write_bytes);
+ xprocfs_add_stat ("write_reqs", xprocfs_sum_st_write_reqs);
+ xprocfs_add_stat ("getattr_reqs", xprocfs_sum_st_getattr_reqs);
+ xprocfs_add_stat ("setattr_reqs", xprocfs_sum_st_setattr_reqs);
+ xprocfs_add_stat ("create_reqs", xprocfs_sum_st_create_reqs);
+ xprocfs_add_stat ("destroy_reqs", xprocfs_sum_st_destroy_reqs);
+ xprocfs_add_stat ("statfs_reqs", xprocfs_sum_st_statfs_reqs);
+ xprocfs_add_stat ("open_reqs", xprocfs_sum_st_open_reqs);
+ xprocfs_add_stat ("close_reqs", xprocfs_sum_st_close_reqs);
+ xprocfs_add_stat ("punch_reqs", xprocfs_sum_st_punch_reqs);
+}
+
+void xprocfs_fini (void)
+{
+ if (xprocfs_dir == NULL)
+ return;
+
+ remove_proc_entry ("read_bytes", xprocfs_dir);
+ remove_proc_entry ("read_reqs", xprocfs_dir);
+ remove_proc_entry ("write_bytes", xprocfs_dir);
+ remove_proc_entry ("write_reqs", xprocfs_dir);
+ remove_proc_entry ("getattr_reqs", xprocfs_dir);
+ remove_proc_entry ("setattr_reqs", xprocfs_dir);
+ remove_proc_entry ("create_reqs", xprocfs_dir);
+ remove_proc_entry ("destroy_reqs", xprocfs_dir);
+ remove_proc_entry ("statfs_reqs", xprocfs_dir);
+ remove_proc_entry ("open_reqs", xprocfs_dir);
+ remove_proc_entry ("close_reqs", xprocfs_dir);
+ remove_proc_entry ("punch_reqs", xprocfs_dir);
+
+ remove_proc_entry (xprocfs_dir->name, xprocfs_dir->parent);
+ xprocfs_dir = NULL;
+}
+
+static int echo_connect(struct lustre_handle *conn, struct obd_device *obd,
+ struct obd_uuid *cluuid, struct recovd_obd *recovd,
+ ptlrpc_recovery_cb_t recover)
+{
+ return class_connect(conn, obd, cluuid);
+}
+
+static int echo_disconnect(struct lustre_handle *conn)
+{
+ struct obd_export *exp = class_conn2export(conn);
+
+ LASSERT (exp != NULL);
+
+ ldlm_cancel_locks_for_export (exp);
+ return (class_disconnect (conn));
+}
+
+static __u64 echo_next_id(struct obd_device *obddev)
+{
+ obd_id id;
+
+ spin_lock(&obddev->u.echo.eo_lock);
+ id = ++obddev->u.echo.eo_lastino;
+ spin_unlock(&obddev->u.echo.eo_lock);
+
+ return id;
+}
+
+int echo_create(struct lustre_handle *conn, struct obdo *oa,
+ struct lov_stripe_md **ea, struct obd_trans_info *oti)
+{
+ struct obd_device *obd = class_conn2obd(conn);
+
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_create_reqs, 1);
+
+ if (!obd) {
+ CERROR("invalid client "LPX64"\n", conn->addr);
+ return -EINVAL;
+ }
+
+ if (!(oa->o_mode && S_IFMT)) {
+ CERROR("echo obd: no type!\n");
+ return -ENOENT;
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLTYPE)) {
+ CERROR("invalid o_valid %08x\n", oa->o_valid);
+ return -EINVAL;
+ }
+
+ oa->o_id = echo_next_id(obd);
+ oa->o_valid = OBD_MD_FLID;
+ atomic_inc(&obd->u.echo.eo_create);
+
+ return 0;
+}
+
+int echo_destroy(struct lustre_handle *conn, struct obdo *oa,
+ struct lov_stripe_md *ea, struct obd_trans_info *oti)
+{
+ struct obd_device *obd = class_conn2obd(conn);
+
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_destroy_reqs, 1);
+
+ if (!obd) {
+ CERROR("invalid client "LPX64"\n", conn->addr);
+ RETURN(-EINVAL);
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLID)) {
+ CERROR("obdo missing FLID valid flag: %08x\n", oa->o_valid);
+ RETURN(-EINVAL);
+ }
+
+ if (oa->o_id > obd->u.echo.eo_lastino || oa->o_id < ECHO_INIT_OBJID) {
+ CERROR("bad destroy objid: "LPX64"\n", oa->o_id);
+ RETURN(-EINVAL);
+ }
+
+ atomic_inc(&obd->u.echo.eo_destroy);
+
+ return 0;
+}
+
+static int echo_open(struct lustre_handle *conn, struct obdo *oa,
+ struct lov_stripe_md *md, struct obd_trans_info *oti)
+{
+ struct lustre_handle *fh = obdo_handle (oa);
+ struct obd_device *obd = class_conn2obd (conn);
+
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_open_reqs, 1);
+
+ if (!obd) {
+ CERROR ("invalid client "LPX64"\n", conn->addr);
+ return (-EINVAL);
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLID)) {
+ CERROR ("obdo missing FLID valid flag: %08x\n", oa->o_valid);
+ return (-EINVAL);
+ }
+
+ fh->addr = oa->o_id;
+ fh->cookie = ECHO_HANDLE_MAGIC;
+
+ oa->o_valid |= OBD_MD_FLHANDLE;
+ return 0;
+}
+
+static int echo_close(struct lustre_handle *conn, struct obdo *oa,
+ struct lov_stripe_md *md, struct obd_trans_info *oti)
+{
+ struct lustre_handle *fh = obdo_handle (oa);
+ struct obd_device *obd = class_conn2obd(conn);
+
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_close_reqs, 1);
+
+ if (!obd) {
+ CERROR("invalid client "LPX64"\n", conn->addr);
+ return (-EINVAL);
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLHANDLE)) {
+ CERROR("obdo missing FLHANDLE valid flag: %08x\n", oa->o_valid);
+ return (-EINVAL);
+ }
+
+ if (fh->cookie != ECHO_HANDLE_MAGIC) {
+ CERROR ("invalid file handle on close: "LPX64"\n", fh->cookie);
+ return (-EINVAL);
+ }
+
+ return 0;
+}
+
+static int echo_getattr(struct lustre_handle *conn, struct obdo *oa,
+ struct lov_stripe_md *md)
+{
+ struct obd_device *obd = class_conn2obd(conn);
+ obd_id id = oa->o_id;
+
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_getattr_reqs, 1);
+
+ if (!obd) {
+ CERROR("invalid client "LPX64"\n", conn->addr);
+ RETURN(-EINVAL);
+ }
-extern struct obd_device obd_dev[MAX_OBD_DEVICES];
-static struct obdo OA;
-static obd_count GEN;
+ if (!(oa->o_valid & OBD_MD_FLID)) {
+ CERROR("obdo missing FLID valid flag: %08x\n", oa->o_valid);
+ RETURN(-EINVAL);
+ }
+
+ obdo_cpy_md(oa, &obd->u.echo.oa, oa->o_valid);
+ oa->o_id = id;
+
+ return 0;
+}
-static int echo_getattr(struct obd_conn *conn, struct obdo *oa)
+static int echo_setattr(struct lustre_handle *conn, struct obdo *oa,
+ struct lov_stripe_md *md, struct obd_trans_info *oti)
{
- memcpy(oa, &OA, sizeof(*oa));
- oa->o_mode = ++GEN;
+ struct obd_device *obd = class_conn2obd(conn);
+
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_setattr_reqs, 1);
+
+ if (!obd) {
+ CERROR("invalid client "LPX64"\n", conn->addr);
+ RETURN(-EINVAL);
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLID)) {
+ CERROR("obdo missing FLID valid flag: %08x\n", oa->o_valid);
+ RETURN(-EINVAL);
+ }
+
+ memcpy(&obd->u.echo.oa, oa, sizeof(*oa));
+
+ atomic_inc(&obd->u.echo.eo_setattr);
return 0;
}
-int echo_preprw(int cmd, struct obd_conn *conn, int objcount,
- struct obd_ioobj *obj, int niocount, struct niobuf *nb,
- struct niobuf *res)
+/* This allows us to verify that desc_private is passed unmolested */
+#define DESC_PRIV 0x10293847
+
+int echo_preprw(int cmd, struct lustre_handle *conn, int objcount,
+ struct obd_ioobj *obj, int niocount, struct niobuf_remote *nb,
+ struct niobuf_local *res, void **desc_private, struct obd_trans_info *oti)
{
+ struct obd_device *obd;
+ struct niobuf_local *r = res;
int rc = 0;
int i;
-
ENTRY;
+
+ if ((cmd & OBD_BRW_WRITE) != 0)
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_write_reqs, 1);
+ else
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_read_reqs, 1);
+
+ obd = class_conn2obd(conn);
+ if (!obd) {
+ CERROR("invalid client "LPX64"\n", conn->addr);
+ RETURN(-EINVAL);
+ }
+
memset(res, 0, sizeof(*res) * niocount);
- for (i = 0; i < objcount; i++, obj++) {
+ CDEBUG(D_PAGE, "%s %d obdos with %d IOs\n",
+ cmd == OBD_BRW_READ ? "reading" : "writing", objcount, niocount);
+
+ *desc_private = (void *)DESC_PRIV;
+
+ obd_kmap_get(niocount, 1);
+
+ for (i = 0; i < objcount; i++, obj++) {
+ int gfp_mask = (obj->ioo_id & 1) ? GFP_HIGHUSER : GFP_KERNEL;
+ int isobj0 = obj->ioo_id == 0;
+ int verify = !isobj0;
int j;
- for (j = 0 ; j < obj->ioo_bufcnt ; j++, nb++, res++) {
- unsigned long address;
+ for (j = 0 ; j < obj->ioo_bufcnt ; j++, nb++, r++) {
- address = get_zeroed_page(GFP_KERNEL);
- if (!address) {
- /* FIXME: cleanup old pages */
- EXIT;
- rc = -ENOMEM;
+ if (isobj0 &&
+ (nb->offset >> PAGE_SHIFT) < ECHO_OBJECT0_NPAGES) {
+ r->page = echo_object0_pages[nb->offset >> PAGE_SHIFT];
+ /* Take extra ref so __free_pages() can be called OK */
+ get_page (r->page);
+ } else {
+ r->page = alloc_pages(gfp_mask, 0);
+ if (r->page == NULL) {
+ CERROR("can't get page %d/%d for id "LPU64"\n",
+ j, obj->ioo_bufcnt, obj->ioo_id);
+ GOTO(preprw_cleanup, rc = -ENOMEM);
+ }
}
-
- /*
- if (cmd == OBD_BRW_READ) {
- __u64 *data = address;
- data[0] = obj->ioo_id;
- data[1] = j;
- data[2] = nb->offset;
- data[3] = nb->len;
+ atomic_inc(&obd->u.echo.eo_prep);
+
+ r->offset = nb->offset;
+ r->addr = kmap(r->page);
+ r->len = nb->len;
+
+ CDEBUG(D_PAGE, "$$$$ get page %p, addr %p@"LPU64"\n",
+ r->page, r->addr, r->offset);
+
+ if (cmd == OBD_BRW_READ) {
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_read_bytes, r->len);
+ if (verify)
+ page_debug_setup(r->addr, r->len, r->offset,
+ obj->ioo_id);
+ } else {
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_write_bytes, r->len);
+ if (verify)
+ page_debug_setup(r->addr, r->len,
+ 0xecc0ecc0ecc0ecc0,
+ 0xecc0ecc0ecc0ecc0);
}
- */
-
- res->addr = address;
- res->offset = nb->offset;
- res->page = virt_to_page(address);
- res->len = PAGE_SIZE;
- // r->flags
}
}
+ CDEBUG(D_PAGE, "%d pages allocated after prep\n",
+ atomic_read(&obd->u.echo.eo_prep));
+
+ RETURN(0);
+
+preprw_cleanup:
+ /* It is possible that we would rather handle errors by allow
+ * any already-set-up pages to complete, rather than tearing them
+ * all down again. I believe that this is what the in-kernel
+ * prep/commit operations do.
+ */
+ CERROR("cleaning up %ld pages (%d obdos)\n", (long)(r - res), objcount);
+ while (r-- > res) {
+ kunmap(r->page);
+ /* NB if this is an 'object0' page, __free_pages will just
+ * lose the extra ref gained above */
+ __free_pages(r->page, 0);
+ atomic_dec(&obd->u.echo.eo_prep);
+ }
+ obd_kmap_put(niocount);
+ memset(res, 0, sizeof(*res) * niocount);
return rc;
}
-int echo_commitrw(int cmd, struct obd_conn *conn, int objcount,
- struct obd_ioobj *obj, int niocount, struct niobuf *res)
+int echo_commitrw(int cmd, struct lustre_handle *conn, int objcount,
+ struct obd_ioobj *obj, int niocount, struct niobuf_local *res,
+ void *desc_private, struct obd_trans_info *oti)
{
- int i;
+ struct obd_device *obd;
+ struct niobuf_local *r = res;
int rc = 0;
+ int vrc = 0;
+ int i;
ENTRY;
- for (i = 0; i < objcount; i++, obj++) {
+ obd = class_conn2obd(conn);
+ if (!obd) {
+ CERROR("invalid client "LPX64"\n", conn->addr);
+ RETURN(-EINVAL);
+ }
+
+ if ((cmd & OBD_BRW_RWMASK) == OBD_BRW_READ) {
+ CDEBUG(D_PAGE, "reading %d obdos with %d IOs\n",
+ objcount, niocount);
+ } else {
+ CDEBUG(D_PAGE, "writing %d obdos with %d IOs\n",
+ objcount, niocount);
+ }
+
+ if (niocount && !r) {
+ CERROR("NULL res niobuf with niocount %d\n", niocount);
+ RETURN(-EINVAL);
+ }
+
+ LASSERT(desc_private == (void *)DESC_PRIV);
+
+ for (i = 0; i < objcount; i++, obj++) {
+ int verify = obj->ioo_id != 0;
int j;
- for (j = 0 ; j < obj->ioo_bufcnt ; j++, res++) {
- struct page *page;
+ for (j = 0 ; j < obj->ioo_bufcnt ; j++, r++) {
+ struct page *page = r->page;
+ void *addr;
- if (!res) {
- /* FIXME: cleanup remaining pages */
- CERROR("NULL buf, obj %Ld (%d), buf %d/%d\n",
- obj->ioo_id, i, j, obj->ioo_bufcnt);
- rc = -EINVAL;
- }
+ if (!page || !(addr = page_address(page)) ||
+ !kern_addr_valid(addr)) {
- page = res->page;
- if (page || !VALID_PAGE(page)) {
- /* FIXME: cleanup remaining pages */
- CERROR("bad page %p, obj %Ld (%d), buf %d/%d\n",
- page, obj->ioo_id, i, j, obj->ioo_bufcnt);
- rc = -EINVAL;
+ CERROR("bad page objid "LPU64":%p, buf %d/%d\n",
+ obj->ioo_id, page, j, obj->ioo_bufcnt);
+ GOTO(commitrw_cleanup, rc = -EFAULT);
}
- page_cache_release(page);
+ CDEBUG(D_PAGE, "$$$$ use page %p, addr %p@"LPU64"\n",
+ r->page, addr, r->offset);
+
+ if (verify) {
+ vrc = page_debug_check("echo", addr, r->len,
+ r->offset, obj->ioo_id);
+ /* check all the pages always */
+ if (vrc != 0 && rc == 0)
+ rc = vrc;
+ }
+
+ kunmap(page);
+ /* NB see comment above regarding object0 pages */
+ obd_kmap_put(1);
+ __free_pages(page, 0);
+ atomic_dec(&obd->u.echo.eo_prep);
}
}
+ CDEBUG(D_PAGE, "%d pages remain after commit\n",
+ atomic_read(&obd->u.echo.eo_prep));
+ RETURN(rc);
+
+commitrw_cleanup:
+ CERROR("cleaning up %ld pages (%d obdos)\n",
+ niocount - (long)(r - res) - 1, objcount);
+ while (++r < res + niocount) {
+ struct page *page = r->page;
+
+ kunmap(page);
+ obd_kmap_put(1);
+ /* NB see comment above regarding object0 pages */
+ __free_pages(page, 0);
+ atomic_dec(&obd->u.echo.eo_prep);
+ }
return rc;
}
-struct obd_ops echo_obd_ops = {
- o_connect: gen_connect,
- o_disconnect: gen_disconnect,
+static int echo_setup(struct obd_device *obddev, obd_count len, void *buf)
+{
+ ENTRY;
+
+ spin_lock_init(&obddev->u.echo.eo_lock);
+ obddev->u.echo.eo_lastino = ECHO_INIT_OBJID;
+
+ obddev->obd_namespace =
+ ldlm_namespace_new("echo-tgt", LDLM_NAMESPACE_SERVER);
+ if (obddev->obd_namespace == NULL) {
+ LBUG();
+ RETURN(-ENOMEM);
+ }
+
+ ptlrpc_init_client (LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
+ "echo_ldlm_cb_client", &obddev->obd_ldlm_client);
+ RETURN(0);
+}
+
+static int echo_cleanup(struct obd_device *obddev)
+{
+ ENTRY;
+
+ ldlm_namespace_free(obddev->obd_namespace);
+ CERROR("%d prep/commitrw pages leaked\n",
+ atomic_read(&obddev->u.echo.eo_prep));
+
+ RETURN(0);
+}
+
+int echo_attach(struct obd_device *dev, obd_count len, void *data)
+{
+ struct lprocfs_static_vars lvars;
+
+ lprocfs_init_vars(&lvars);
+ return lprocfs_obd_attach(dev, lvars.obd_vars);
+}
+
+int echo_detach(struct obd_device *dev)
+{
+ return lprocfs_obd_detach(dev);
+}
+
+static struct obd_ops echo_obd_ops = {
+ o_owner: THIS_MODULE,
+ o_attach: echo_attach,
+ o_detach: echo_detach,
+ o_connect: echo_connect,
+ o_disconnect: echo_disconnect,
+ o_create: echo_create,
+ o_destroy: echo_destroy,
+ o_open: echo_open,
+ o_close: echo_close,
o_getattr: echo_getattr,
+ o_setattr: echo_setattr,
o_preprw: echo_preprw,
o_commitrw: echo_commitrw,
+ o_setup: echo_setup,
+ o_cleanup: echo_cleanup
};
+extern int echo_client_init(void);
+extern void echo_client_cleanup(void);
+
+static void
+echo_object0_pages_fini (void)
+{
+ int i;
+
+ for (i = 0; i < ECHO_OBJECT0_NPAGES; i++)
+ if (echo_object0_pages[i] != NULL) {
+ __free_pages (echo_object0_pages[i], 0);
+ echo_object0_pages[i] = NULL;
+ }
+}
+
+static int
+echo_object0_pages_init (void)
+{
+ struct page *pg;
+ int i;
+
+ for (i = 0; i < ECHO_OBJECT0_NPAGES; i++) {
+ int gfp_mask = (i < ECHO_OBJECT0_NPAGES/2) ? GFP_KERNEL : GFP_HIGHUSER;
+
+ pg = alloc_pages (gfp_mask, 0);
+ if (pg == NULL) {
+ echo_object0_pages_fini ();
+ return (-ENOMEM);
+ }
+
+ memset (kmap (pg), 0, PAGE_SIZE);
+ kunmap (pg);
+
+ echo_object0_pages[i] = pg;
+ }
+
+ return (0);
+}
static int __init obdecho_init(void)
{
- printk(KERN_INFO "Echo OBD driver v0.001, braam@clusterfs.com\n");
+ struct lprocfs_static_vars lvars;
+ int rc;
+
+ printk(KERN_INFO "Lustre Echo OBD driver; info@clusterfs.com\n");
+
+ lprocfs_init_vars(&lvars);
+
+ xprocfs_init ("echo");
+
+ rc = echo_object0_pages_init ();
+ if (rc != 0)
+ goto failed_0;
+
+ rc = class_register_type(&echo_obd_ops, lvars.module_vars,
+ OBD_ECHO_DEVICENAME);
+ if (rc != 0)
+ goto failed_1;
+
+ rc = echo_client_init();
+ if (rc == 0)
+ RETURN (0);
- return obd_register_type(&echo_obd_ops, OBD_ECHO_DEVICENAME);
+ class_unregister_type(OBD_ECHO_DEVICENAME);
+ failed_1:
+ echo_object0_pages_fini ();
+ failed_0:
+ xprocfs_fini ();
+
+ RETURN(rc);
}
static void __exit obdecho_exit(void)
{
- obd_unregister_type(OBD_ECHO_DEVICENAME);
+ echo_client_cleanup();
+ class_unregister_type(OBD_ECHO_DEVICENAME);
+ echo_object0_pages_fini ();
+ xprocfs_fini ();
}
-MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre Testing Echo OBD driver v1.0");
-MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
+MODULE_DESCRIPTION("Lustre Testing Echo OBD driver");
+MODULE_LICENSE("GPL");
module_init(obdecho_init);
module_exit(obdecho_exit);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff