/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * linux/fs/ext2_obd/ext2_obd.c
+ * linux/fs/obdecho/echo.c
*
- * Copyright (C) 2001 Cluster File Systems, Inc.
+ * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
*
* This code is issued under the GNU General Public License.
* See the file COPYING in this distribution
*
* by Peter Braam <braam@clusterfs.com>
+ * and Andreas Dilger <adilger@clusterfs.com>
*/
+static char rcsid[] __attribute ((unused)) = "$Id: echo.c,v 1.42 2002/11/01 17:23:13 thantry Exp $";
+#define OBDECHO_VERSION "$Revision: 1.42 $"
+
#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>
+
+static atomic_t echo_page_rws;
+static atomic_t echo_getattrs;
+
+#define ECHO_PROC_STAT "sys/obdecho"
+#define ECHO_INIT_OBJID 0x1000000000000000ULL
+
+extern lprocfs_vars_t status_var_nm_1[];
+extern lprocfs_vars_t status_class_var[];
+
+int echo_proc_read(char *page, char **start, off_t off, int count, int *eof,
+ void *data)
+{
+ long long attrs = atomic_read(&echo_getattrs);
+ long long pages = atomic_read(&echo_page_rws);
+ int len;
+
+ *eof = 1;
+ if (off != 0)
+ return (0);
+
+ len = sprintf(page, "%Ld %Ld\n", attrs, pages);
+
+ *start = page;
+ return (len);
+}
+
+int echo_proc_write(struct file *file, const char *ubuffer,
+ unsigned long count, void *data)
+{
+ /* Ignore what we've been asked to write, and just zero the counters */
+ atomic_set (&echo_page_rws, 0);
+ atomic_set (&echo_getattrs, 0);
+
+ return (count);
+}
+
+void echo_proc_init(void)
+{
+ struct proc_dir_entry *entry;
+
+ entry = create_proc_entry(ECHO_PROC_STAT, S_IFREG|S_IRUGO|S_IWUSR,NULL);
-extern struct obd_device obd_dev[MAX_OBD_DEVICES];
-static struct obdo OA;
-static obd_count GEN;
-static long echo_pages = 0;
+ if (entry == NULL) {
+ CERROR("couldn't create proc entry %s\n", ECHO_PROC_STAT);
+ return;
+ }
+
+ entry->data = NULL;
+ entry->read_proc = echo_proc_read;
+ entry->write_proc = echo_proc_write;
+}
-static int echo_connect(struct obd_conn *conn, struct obd_device *obd)
+void echo_proc_fini(void)
+{
+ remove_proc_entry(ECHO_PROC_STAT, 0);
+}
+
+static int echo_connect(struct lustre_handle *conn, struct obd_device *obd,
+ obd_uuid_t cluuid, struct recovd_obd *recovd,
+ ptlrpc_recovery_cb_t recover)
{
int rc;
MOD_INC_USE_COUNT;
- rc = gen_connect(conn, obd);
+ rc = class_connect(conn, obd, cluuid);
if (rc)
MOD_DEC_USE_COUNT;
return rc;
}
-static int echo_disconnect(struct obd_conn *conn)
+static int echo_disconnect(struct lustre_handle *conn)
{
int rc;
- rc = gen_disconnect(conn);
+ rc = class_disconnect(conn);
if (!rc)
MOD_DEC_USE_COUNT;
return rc;
}
-static int echo_getattr(struct obd_conn *conn, struct obdo *oa)
+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_device *obd = class_conn2obd(conn);
+
+ if (!obd) {
+ CERROR("invalid client %Lx\n", conn->addr);
+ return -EINVAL;
+ }
+
+ if (!(oa->o_mode && S_IFMT)) {
+ CERROR("filter 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_device *obd = class_conn2obd(conn);
+
+ 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)
+{
+ return 0;
+}
+
+static int echo_close(struct lustre_handle *conn, struct obdo *oa,
+ struct lov_stripe_md *md)
+{
+ 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;
+
+ 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(oa, &obd->u.echo.oa, sizeof(*oa));
+ oa->o_id = id;
+ oa->o_valid |= OBD_MD_FLID;
+
+ atomic_inc(&echo_getattrs);
+
+ return 0;
+}
+
+static int echo_setattr(struct lustre_handle *conn, struct obdo *oa,
+ struct lov_stripe_md *md)
{
- memcpy(oa, &OA, sizeof(*oa));
- oa->o_mode = ++GEN;
+ struct obd_device *obd = class_conn2obd(conn);
+
+ 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,
+/* 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_device *obd;
struct niobuf_local *r = res;
int rc = 0;
int i;
ENTRY;
+ obd = class_conn2obd(conn);
+ if (!obd) {
+ CERROR("invalid client "LPX64"\n", conn->addr);
+ RETURN(-EINVAL);
+ }
+
memset(res, 0, sizeof(*res) * niocount);
CDEBUG(D_PAGE, "%s %d obdos with %d IOs\n",
cmd == OBD_BRW_READ ? "reading" : "writing", objcount, niocount);
+ *desc_private = (void *)DESC_PRIV;
+
for (i = 0; i < objcount; i++, obj++) {
+ int gfp_mask = (obj->ioo_id & 1) ? GFP_HIGHUSER : GFP_KERNEL;
+ int verify = obj->ioo_id != 0;
int j;
for (j = 0 ; j < obj->ioo_bufcnt ; j++, nb++, r++) {
- unsigned long address;
-
- address = get_zeroed_page(GFP_KERNEL);
- if (!address) {
- CERROR("can't get new page %d/%d for id %Ld\n",
- j, obj->ioo_bufcnt,
- (unsigned long long)obj->ioo_id);
+ r->page = alloc_pages(gfp_mask, 0);
+ if (!r->page) {
+ CERROR("can't get page %d/%d for id "LPU64"\n",
+ j, obj->ioo_bufcnt, obj->ioo_id);
GOTO(preprw_cleanup, rc = -ENOMEM);
}
- echo_pages++;
+ atomic_inc(&obd->u.echo.eo_prep);
r->offset = nb->offset;
- r->page = virt_to_page(address);
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 (verify && cmd == OBD_BRW_READ)
+ page_debug_setup(r->addr, r->len, r->offset,
+ obj->ioo_id);
+ else if (verify)
+ page_debug_setup(r->addr, r->len,
+ 0xecc0ecc0ecc0ecc0,
+ 0xecc0ecc0ecc0ecc0);
}
}
- CDEBUG(D_PAGE, "%ld pages allocated after prep\n", echo_pages);
+ CDEBUG(D_PAGE, "%d pages allocated after prep\n",
+ atomic_read(&obd->u.echo.eo_prep));
RETURN(0);
while (r-- > res) {
kunmap(r->page);
__free_pages(r->page, 0);
- echo_pages--;
+ atomic_dec(&obd->u.echo.eo_prep);
}
memset(res, 0, sizeof(*res) * niocount);
return rc;
}
-int echo_commitrw(int cmd, struct obd_conn *conn, int objcount,
+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_device *obd;
struct niobuf_local *r = res;
int rc = 0;
int i;
ENTRY;
- CDEBUG(D_PAGE, "%s %d obdos with %d IOs\n",
- cmd == OBD_BRW_READ ? "reading" : "writing", objcount, niocount);
+ 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++, r++) {
struct page *page = r->page;
- unsigned long addr;
+ void *addr;
- if (!page ||
- !(addr = (unsigned long)page_address(page)) ||
+ if (!page || !(addr = page_address(page)) ||
!kern_addr_valid(addr)) {
- CERROR("bad page %p, id %Ld (%d), buf %d/%d\n",
- page, (unsigned long long)obj->ioo_id, i,
- j, obj->ioo_bufcnt);
+ CERROR("bad page objid "LPU64":%p, buf %d/%d\n",
+ obj->ioo_id, page, j, obj->ioo_bufcnt);
GOTO(commitrw_cleanup, rc = -EFAULT);
}
+ atomic_inc(&echo_page_rws);
+
+ CDEBUG(D_PAGE, "$$$$ use page %p, addr %p@"LPU64"\n",
+ r->page, addr, r->offset);
+
+ if (verify)
+ page_debug_check("echo", addr, r->len,
+ r->offset, obj->ioo_id);
+
kunmap(page);
__free_pages(page, 0);
- echo_pages--;
+ atomic_dec(&obd->u.echo.eo_prep);
}
}
- CDEBUG(D_PAGE, "%ld pages remain after commit\n", echo_pages);
+ CDEBUG(D_PAGE, "%d pages remain after commit\n",
+ atomic_read(&obd->u.echo.eo_prep));
RETURN(0);
commitrw_cleanup:
kunmap(page);
__free_pages(page, 0);
- echo_pages--;
+ atomic_dec(&obd->u.echo.eo_prep);
}
return rc;
}
+static int echo_setup(struct obd_device *obddev, obd_count len, void *buf)
+{
+ ENTRY;
+
+ obddev->obd_namespace =
+ ldlm_namespace_new("echo-tgt", LDLM_NAMESPACE_SERVER);
+ if (obddev->obd_namespace == NULL) {
+ LBUG();
+ RETURN(-ENOMEM);
+ }
+ spin_lock_init(&obddev->u.echo.eo_lock);
+ obddev->u.echo.eo_lastino = ECHO_INIT_OBJID;
+
+ 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)
+{
+ int rc;
+ rc = lprocfs_reg_obd(dev, (lprocfs_vars_t*)status_var_nm_1, (void*)dev);
+ return rc;
+}
+
+int echo_detach(struct obd_device *dev)
+{
+ int rc;
+ rc = lprocfs_dereg_obd(dev);
+ return rc;
+
+}
+
+
struct obd_ops echo_obd_ops = {
- o_connect: echo_connect,
- o_disconnect: echo_disconnect,
- o_getattr: echo_getattr,
- o_preprw: echo_preprw,
- o_commitrw: echo_commitrw,
+ 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
};
-
static int __init obdecho_init(void)
{
- printk(KERN_INFO "Echo OBD driver v0.001, braam@clusterfs.com\n");
+ int rc;
+
+
+ printk(KERN_INFO "Echo OBD driver " OBDECHO_VERSION
+ " info@clusterfs.com\n");
+
+ echo_proc_init();
+ rc = class_register_type(&echo_obd_ops,
+ (lprocfs_vars_t*)status_class_var,
+ OBD_ECHO_DEVICENAME);
+ if (rc) RETURN(rc);
+
+ return 0;
- return obd_register_type(&echo_obd_ops, OBD_ECHO_DEVICENAME);
}
static void __exit obdecho_exit(void)
{
- CERROR("%ld prep/commitrw pages leaked\n", echo_pages);
- obd_unregister_type(OBD_ECHO_DEVICENAME);
+
+ echo_proc_fini();
+
+ class_unregister_type(OBD_ECHO_DEVICENAME);
}
MODULE_AUTHOR("Cluster Filesystems Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre Testing Echo OBD driver v1.0");
-MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Lustre Testing Echo OBD driver " OBDECHO_VERSION);
+MODULE_LICENSE("GPL");
module_init(obdecho_init);
module_exit(obdecho_exit);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff