/* -*- 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.
*
* This file is part of Lustre, http://www.lustre.org.
*
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#define DEBUG_SUBSYSTEM S_ECHO
+#ifdef __KERNEL__
#include <linux/version.h>
#include <linux/module.h>
#include <linux/fs.h>
+#include <linux/completion.h>
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+#include <linux/iobuf.h>
+#endif
+#include <asm/div64.h>
+#include <linux/smp_lock.h>
+#else
+#include <liblustre.h>
+#endif
-#define DEBUG_SUBSYSTEM S_ECHO
-
+#include <linux/obd.h>
#include <linux/obd_support.h>
#include <linux/obd_class.h>
#include <linux/obd_echo.h>
#include <linux/lustre_debug.h>
#include <linux/lprocfs_status.h>
-static int echo_iocontrol(long cmd, struct lustre_handle *obdconn, int len,
- void *karg, void *uarg)
+static obd_id last_object_id;
+
+#if 0
+static void
+echo_printk_object (char *msg, struct ec_object *eco)
{
- struct obd_device *obd = class_conn2obd(obdconn);
- struct echo_client_obd *ec = &obd->u.echo_client;
- struct obd_ioctl_data *data = karg;
- int rw = OBD_BRW_READ, rc = 0;
- struct lov_stripe_md *lsm = NULL;
- ENTRY;
+ struct lov_stripe_md *lsm = eco->eco_lsm;
+ int i;
- if (obd == NULL) {
- CERROR("ioctl: No device\n");
- GOTO(out, rc = -EINVAL);
+ printk (KERN_INFO "Lustre: %s: object %p: "LPX64", refs %d%s: "LPX64
+ "=%u!%u\n", msg, eco, eco->eco_id, eco->eco_refcount,
+ eco->eco_deleted ? "(deleted) " : "",
+ lsm->lsm_object_id, lsm->lsm_stripe_size,
+ lsm->lsm_stripe_count);
+
+ for (i = 0; i < lsm->lsm_stripe_count; i++)
+ printk (KERN_INFO "Lustre: @%2u:"LPX64"\n",
+ lsm->lsm_oinfo[i].loi_ost_idx,
+ lsm->lsm_oinfo[i].loi_id);
+}
+#endif
+
+static struct ec_object *
+echo_find_object_locked (struct obd_device *obd, obd_id id)
+{
+ struct echo_client_obd *ec = &obd->u.echocli;
+ struct ec_object *eco = NULL;
+ struct list_head *el;
+
+ list_for_each (el, &ec->ec_objects) {
+ eco = list_entry (el, struct ec_object, eco_obj_chain);
+
+ if (eco->eco_id == id)
+ return (eco);
}
+ return (NULL);
+}
- if (data->ioc_inllen1 == sizeof(*lsm)) {
- lsm = (struct lov_stripe_md *)data->ioc_inlbuf1;
- } else if (data->ioc_inllen1 != 0) {
- CERROR("nonzero ioc_inllen1 != sizeof(struct lov_stripe_md)\n");
- GOTO(out, rc = -EINVAL);
+static int
+echo_copyout_lsm (struct lov_stripe_md *lsm, void *ulsm, int ulsm_nob)
+{
+ int nob;
+
+ nob = offsetof (struct lov_stripe_md, lsm_oinfo[lsm->lsm_stripe_count]);
+ if (nob > ulsm_nob)
+ return (-EINVAL);
+
+ if (copy_to_user (ulsm, lsm, nob))
+ return (-EFAULT);
+
+ return (0);
+}
+
+static int
+echo_copyin_lsm (struct obd_device *obd, struct lov_stripe_md *lsm,
+ void *ulsm, int ulsm_nob)
+{
+ struct echo_client_obd *ec = &obd->u.echocli;
+ int nob;
+
+ if (ulsm_nob < sizeof (*lsm))
+ return (-EINVAL);
+
+ if (copy_from_user (lsm, ulsm, sizeof (*lsm)))
+ return (-EFAULT);
+
+ nob = lsm->lsm_stripe_count * sizeof (lsm->lsm_oinfo[0]);
+
+ if (ulsm_nob < nob ||
+ lsm->lsm_stripe_count > ec->ec_nstripes ||
+ lsm->lsm_magic != LOV_MAGIC ||
+ (lsm->lsm_stripe_size & (PAGE_SIZE - 1)) != 0 ||
+ ((__u64)lsm->lsm_stripe_size * lsm->lsm_stripe_count > ~0UL))
+ return (-EINVAL);
+
+ if (copy_from_user(lsm->lsm_oinfo,
+ ((struct lov_stripe_md *)ulsm)->lsm_oinfo, nob))
+ return (-EFAULT);
+
+ return (0);
+}
+
+static struct ec_object *
+echo_allocate_object (struct obd_device *obd)
+{
+ struct echo_client_obd *ec = &obd->u.echocli;
+ struct ec_object *eco;
+ int rc;
+
+ OBD_ALLOC(eco, sizeof (*eco));
+ if (eco == NULL)
+ return NULL;
+
+ rc = obd_alloc_memmd(ec->ec_exp, &eco->eco_lsm);
+ if (rc < 0) {
+ OBD_FREE(eco, sizeof (*eco));
+ return NULL;
}
- switch (cmd) {
- case OBD_IOC_CREATE: {
- struct lov_stripe_md *tmp_lsm = NULL;
- rc = obd_create(&ec->conn, &data->ioc_obdo1, &tmp_lsm);
- if (lsm)
- memcpy(lsm, tmp_lsm, sizeof(*tmp_lsm));
+ eco->eco_device = obd;
+ eco->eco_deleted = 0;
+ eco->eco_refcount = 0;
+ eco->eco_lsm->lsm_magic = LOV_MAGIC;
+ /* leave stripe count 0 by default */
- GOTO(out, rc);
+ return (eco);
+}
+
+static void
+echo_free_object (struct ec_object *eco)
+{
+ struct obd_device *obd = eco->eco_device;
+ struct echo_client_obd *ec = &obd->u.echocli;
+
+ LASSERT (eco->eco_refcount == 0);
+ obd_free_memmd(ec->ec_exp, &eco->eco_lsm);
+ OBD_FREE (eco, sizeof (*eco));
+}
+
+static int echo_create_object(struct obd_device *obd, int on_target,
+ struct obdo *oa, void *ulsm, int ulsm_nob,
+ struct obd_trans_info *oti)
+{
+ struct echo_client_obd *ec = &obd->u.echocli;
+ struct ec_object *eco2;
+ struct ec_object *eco;
+ struct lov_stripe_md *lsm;
+ int rc;
+ int i, idx;
+
+ if ((oa->o_valid & OBD_MD_FLID) == 0 && /* no obj id */
+ (on_target || /* set_stripe */
+ ec->ec_nstripes != 0)) { /* LOV */
+ CERROR ("No valid oid\n");
+ return (-EINVAL);
}
- case OBD_IOC_GETATTR:
- rc = obd_getattr(&ec->conn, &data->ioc_obdo1, lsm);
- GOTO(out, rc);
+ if (ulsm != NULL) {
+ eco = echo_allocate_object (obd);
+ if (eco == NULL)
+ return (-ENOMEM);
- case OBD_IOC_SETATTR:
- rc = obd_setattr(&ec->conn, &data->ioc_obdo1, lsm);
- GOTO(out, rc);
+ lsm = eco->eco_lsm;
- case OBD_IOC_DESTROY:
- rc = obd_destroy(&ec->conn, &data->ioc_obdo1, lsm);
- GOTO(out, rc);
+ rc = echo_copyin_lsm (obd, lsm, ulsm, ulsm_nob);
+ if (rc != 0)
+ goto failed;
- case OBD_IOC_OPEN:
- rc = obd_open(&ec->conn, &data->ioc_obdo1, lsm);
- GOTO(out, rc);
+ /* setup object ID here for !on_target and LOV hint */
+ if ((oa->o_valid & OBD_MD_FLID) != 0)
+ eco->eco_id = lsm->lsm_object_id = oa->o_id;
- case OBD_IOC_CLOSE:
- rc = obd_close(&ec->conn, &data->ioc_obdo1, lsm);
- GOTO(out, rc);
+ if (lsm->lsm_stripe_count == 0)
+ lsm->lsm_stripe_count = ec->ec_nstripes;
- case OBD_IOC_BRW_WRITE:
- rw = OBD_BRW_WRITE;
- case OBD_IOC_BRW_READ: {
- struct lov_stripe_md tmp_lsm;
- struct obd_brw_set *set;
- obd_count pages = 0;
- struct brw_page *pga, *pgp;
- __u64 off, id = data->ioc_obdo1.o_id;
- int gfp_mask = (id & 1) ? GFP_HIGHUSER : GFP_KERNEL;
- int j, verify = (id != 0);
-
- if (lsm && lsm->lsm_object_id != id) {
- CERROR("LSM object ID ("LPU64") != id ("LPU64")\n",
- lsm->lsm_object_id, id);
- GOTO(out, rc = -EINVAL);
+ if (lsm->lsm_stripe_size == 0)
+ lsm->lsm_stripe_size = PAGE_SIZE;
+
+ idx = ll_insecure_random_int();
+
+ /* setup stripes: indices + default ids if required */
+ for (i = 0; i < lsm->lsm_stripe_count; i++) {
+ if (lsm->lsm_oinfo[i].loi_id == 0)
+ lsm->lsm_oinfo[i].loi_id = lsm->lsm_object_id;
+
+ lsm->lsm_oinfo[i].loi_ost_idx =
+ (idx + i) % ec->ec_nstripes;
}
+ } else {
+ OBD_ALLOC(eco, sizeof(*eco));
+ eco->eco_device = obd;
+ lsm = NULL;
+ }
+
+ if (oa->o_id == 0)
+ oa->o_id = ++last_object_id;
+
+ if (on_target) {
+ oa->o_gr = FILTER_GROUP_ECHO;
+ oa->o_valid |= OBD_MD_FLGROUP;
+ rc = obd_create(ec->ec_exp, oa, &lsm, oti);
+ if (rc != 0)
+ goto failed;
+
+ /* See what object ID we were given */
+ eco->eco_id = oa->o_id = lsm->lsm_object_id;
+ oa->o_valid |= OBD_MD_FLID;
+
+ LASSERT(eco->eco_lsm == NULL || eco->eco_lsm == lsm);
+ eco->eco_lsm = lsm;
+ }
+
+ spin_lock (&ec->ec_lock);
+
+ eco2 = echo_find_object_locked (obd, oa->o_id);
+ if (eco2 != NULL) { /* conflict */
+ spin_unlock (&ec->ec_lock);
+
+ CERROR ("Can't create object id "LPX64": id already exists%s\n",
+ oa->o_id, on_target ? " (undoing create)" : "");
+
+ if (on_target)
+ obd_destroy(ec->ec_exp, oa, lsm, oti);
+
+ rc = -EEXIST;
+ goto failed;
+ }
+
+ list_add (&eco->eco_obj_chain, &ec->ec_objects);
+ spin_unlock (&ec->ec_lock);
+ CDEBUG (D_INFO,
+ "created %p: "LPX64"=%u#%u@%u refs %d del %d\n",
+ eco, eco->eco_id,
+ eco->eco_lsm->lsm_stripe_size,
+ eco->eco_lsm->lsm_stripe_count,
+ eco->eco_lsm->lsm_oinfo[0].loi_ost_idx,
+ eco->eco_refcount, eco->eco_deleted);
+ return (0);
+
+ failed:
+ echo_free_object (eco);
+ return (rc);
+}
+
+static int
+echo_get_object (struct ec_object **ecop, struct obd_device *obd,
+ struct obdo *oa)
+{
+ struct echo_client_obd *ec = &obd->u.echocli;
+ struct ec_object *eco;
+ struct ec_object *eco2;
+ int rc;
+
+ if ((oa->o_valid & OBD_MD_FLID) == 0 ||
+ oa->o_id == 0) /* disallow use of object id 0 */
+ {
+ CERROR ("No valid oid\n");
+ return (-EINVAL);
+ }
+
+ spin_lock (&ec->ec_lock);
+ eco = echo_find_object_locked (obd, oa->o_id);
+ if (eco != NULL) {
+ if (eco->eco_deleted) /* being deleted */
+ return (-EAGAIN); /* (see comment in cleanup) */
+
+ eco->eco_refcount++;
+ spin_unlock (&ec->ec_lock);
+ *ecop = eco;
+ CDEBUG (D_INFO,
+ "found %p: "LPX64"=%u#%u@%u refs %d del %d\n",
+ eco, eco->eco_id,
+ eco->eco_lsm->lsm_stripe_size,
+ eco->eco_lsm->lsm_stripe_count,
+ eco->eco_lsm->lsm_oinfo[0].loi_ost_idx,
+ eco->eco_refcount, eco->eco_deleted);
+ return (0);
+ }
+ spin_unlock (&ec->ec_lock);
+
+ if (ec->ec_nstripes != 0) /* striping required */
+ return (-ENOENT);
+
+ eco = echo_allocate_object (obd);
+ if (eco == NULL)
+ return (-ENOMEM);
+
+ eco->eco_id = eco->eco_lsm->lsm_object_id = oa->o_id;
+
+ spin_lock (&ec->ec_lock);
+
+ eco2 = echo_find_object_locked (obd, oa->o_id);
+ if (eco2 == NULL) { /* didn't race */
+ list_add (&eco->eco_obj_chain, &ec->ec_objects);
+ spin_unlock (&ec->ec_lock);
+ eco->eco_refcount = 1;
+ *ecop = eco;
+ CDEBUG (D_INFO,
+ "created %p: "LPX64"=%u#%u@%d refs %d del %d\n",
+ eco, eco->eco_id,
+ eco->eco_lsm->lsm_stripe_size,
+ eco->eco_lsm->lsm_stripe_count,
+ eco->eco_lsm->lsm_oinfo[0].loi_ost_idx,
+ eco->eco_refcount, eco->eco_deleted);
+ return (0);
+ }
+
+ if (eco2->eco_deleted)
+ rc = -EAGAIN; /* lose race */
+ else {
+ eco2->eco_refcount++; /* take existing */
+ *ecop = eco2;
+ rc = 0;
+ LASSERT (eco2->eco_id == eco2->eco_lsm->lsm_object_id);
+ CDEBUG (D_INFO,
+ "found(2) %p: "LPX64"=%u#%u@%d refs %d del %d\n",
+ eco2, eco2->eco_id,
+ eco2->eco_lsm->lsm_stripe_size,
+ eco2->eco_lsm->lsm_stripe_count,
+ eco2->eco_lsm->lsm_oinfo[0].loi_ost_idx,
+ eco2->eco_refcount, eco2->eco_deleted);
+ }
+
+ spin_unlock (&ec->ec_lock);
+
+ echo_free_object (eco);
+ return (rc);
+}
+
+static void
+echo_put_object (struct ec_object *eco)
+{
+ struct obd_device *obd = eco->eco_device;
+ struct echo_client_obd *ec = &obd->u.echocli;
+
+ /* Release caller's ref on the object.
+ * delete => mark for deletion when last ref goes
+ */
- if (!lsm) {
- memset(&tmp_lsm, 0, sizeof(tmp_lsm));
- lsm = &tmp_lsm;
- lsm->lsm_object_id = id;
+ spin_lock (&ec->ec_lock);
+
+ eco->eco_refcount--;
+ LASSERT (eco->eco_refcount >= 0);
+
+ CDEBUG(D_INFO, "put %p: "LPX64"=%u#%u@%d refs %d del %d\n",
+ eco, eco->eco_id,
+ eco->eco_lsm->lsm_stripe_size,
+ eco->eco_lsm->lsm_stripe_count,
+ eco->eco_lsm->lsm_oinfo[0].loi_ost_idx,
+ eco->eco_refcount, eco->eco_deleted);
+
+ if (eco->eco_refcount != 0 || !eco->eco_deleted) {
+ spin_unlock (&ec->ec_lock);
+ return;
+ }
+
+ spin_unlock (&ec->ec_lock);
+
+ /* NB leave obj in the object list. We must prevent anyone from
+ * attempting to enqueue on this object number until we can be
+ * sure there will be no more lock callbacks.
+ */
+ obd_cancel_unused(ec->ec_exp, eco->eco_lsm, 0, NULL);
+
+ /* now we can let it go */
+ spin_lock (&ec->ec_lock);
+ list_del (&eco->eco_obj_chain);
+ spin_unlock (&ec->ec_lock);
+
+ LASSERT (eco->eco_refcount == 0);
+
+ echo_free_object (eco);
+}
+
+static void
+echo_get_stripe_off_id (struct lov_stripe_md *lsm, obd_off *offp, obd_id *idp)
+{
+ unsigned long stripe_count;
+ unsigned long stripe_size;
+ unsigned long width;
+ unsigned long woffset;
+ int stripe_index;
+ obd_off offset;
+
+ if (lsm->lsm_stripe_count <= 1)
+ return;
+
+ offset = *offp;
+ stripe_size = lsm->lsm_stripe_size;
+ stripe_count = lsm->lsm_stripe_count;
+
+ /* width = # bytes in all stripes */
+ width = stripe_size * stripe_count;
+
+ /* woffset = offset within a width; offset = whole number of widths */
+ woffset = do_div (offset, width);
+
+ stripe_index = woffset / stripe_size;
+
+ *idp = lsm->lsm_oinfo[stripe_index].loi_id;
+ *offp = offset * stripe_size + woffset % stripe_size;
+}
+
+static void
+echo_client_page_debug_setup(struct lov_stripe_md *lsm,
+ struct page *page, int rw, obd_id id,
+ obd_off offset, obd_off count)
+{
+ char *addr;
+ obd_off stripe_off;
+ obd_id stripe_id;
+ int delta;
+
+ /* no partial pages on the client */
+ LASSERT(count == PAGE_SIZE);
+
+ addr = kmap(page);
+
+ for (delta = 0; delta < PAGE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) {
+ if (rw == OBD_BRW_WRITE) {
+ stripe_off = offset + delta;
+ stripe_id = id;
+ echo_get_stripe_off_id(lsm, &stripe_off, &stripe_id);
+ } else {
+ stripe_off = 0xdeadbeef00c0ffeeULL;
+ stripe_id = 0xdeadbeef00c0ffeeULL;
}
+ block_debug_setup(addr + delta, OBD_ECHO_BLOCK_SIZE,
+ stripe_off, stripe_id);
+ }
+
+ kunmap(page);
+}
+
+static int
+echo_client_page_debug_check(struct lov_stripe_md *lsm,
+ struct page *page, obd_id id,
+ obd_off offset, obd_off count)
+{
+ obd_off stripe_off;
+ obd_id stripe_id;
+ char *addr;
+ int delta;
+ int rc;
+ int rc2;
- if (data->ioc_count < 0) {
- CERROR("invalid buffer size: "LPD64"\n",
- data->ioc_count);
- GOTO(out, rc = -EINVAL);
+ /* no partial pages on the client */
+ LASSERT(count == PAGE_SIZE);
+
+ addr = kmap(page);
+
+ for (rc = delta = 0; delta < PAGE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) {
+ stripe_off = offset + delta;
+ stripe_id = id;
+ echo_get_stripe_off_id (lsm, &stripe_off, &stripe_id);
+
+ rc2 = block_debug_check("test_brw",
+ addr + delta, OBD_ECHO_BLOCK_SIZE,
+ stripe_off, stripe_id);
+ if (rc2 != 0) {
+ CERROR ("Error in echo object "LPX64"\n", id);
+ rc = rc2;
}
+ }
+
+ kunmap(page);
+ return rc;
+}
+
+static int echo_client_kbrw(struct obd_device *obd, int rw, struct obdo *oa,
+ struct lov_stripe_md *lsm, obd_off offset,
+ obd_size count, struct obd_trans_info *oti)
+{
+ struct echo_client_obd *ec = &obd->u.echocli;
+ obd_count npages;
+ struct brw_page *pga;
+ struct brw_page *pgp;
+ obd_off off;
+ int i;
+ int rc;
+ int verify = 0;
+ int gfp_mask;
+
+ verify = ((oa->o_id) != ECHO_PERSISTENT_OBJID &&
+ (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
+ (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
+
+ gfp_mask = ((oa->o_id & 2) == 0) ? GFP_KERNEL : GFP_HIGHUSER;
+
+ LASSERT(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ);
+
+ if (count <= 0 ||
+ (count & (PAGE_SIZE - 1)) != 0 ||
+ (lsm != NULL &&
+ lsm->lsm_object_id != oa->o_id))
+ return (-EINVAL);
+
+ /* XXX think again with misaligned I/O */
+ npages = count >> PAGE_SHIFT;
+
+ OBD_ALLOC(pga, npages * sizeof(*pga));
+ if (pga == NULL)
+ return (-ENOMEM);
+
+ for (i = 0, pgp = pga, off = offset;
+ i < npages;
+ i++, pgp++, off += PAGE_SIZE) {
+
+ LASSERT (pgp->pg == NULL); /* for cleanup */
+
+ rc = -ENOMEM;
+ pgp->pg = alloc_pages (gfp_mask, 0);
+ if (pgp->pg == NULL)
+ goto out;
+
+ pgp->count = PAGE_SIZE;
+ pgp->disk_offset = pgp->page_offset = off;
+ pgp->flag = 0;
+
+ if (verify)
+ echo_client_page_debug_setup(lsm, pgp->pg, rw,
+ oa->o_id, off, pgp->count);
+ }
+
+ rc = obd_brw(rw, ec->ec_exp, oa, lsm, npages, pga, oti);
+
+ out:
+ if (rc != 0 || rw != OBD_BRW_READ)
+ verify = 0;
+
+ for (i = 0, pgp = pga; i < npages; i++, pgp++) {
+ if (pgp->pg == NULL)
+ continue;
+
+ if (verify) {
+ int vrc;
+ vrc = echo_client_page_debug_check(lsm, pgp->pg, oa->o_id,
+ pgp->page_offset,
+ pgp->count);
+ if (vrc != 0 && rc == 0)
+ rc = vrc;
+ }
+ __free_pages(pgp->pg, 0);
+ }
+ OBD_FREE(pga, npages * sizeof(*pga));
+ return (rc);
+}
+
+#ifdef __KERNEL__
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static int echo_client_ubrw(struct obd_device *obd, int rw,
+ struct obdo *oa, struct lov_stripe_md *lsm,
+ obd_off offset, obd_size count, char *buffer,
+ struct obd_trans_info *oti)
+{
+ struct echo_client_obd *ec = &obd->u.echocli;
+ obd_count npages;
+ struct brw_page *pga;
+ struct brw_page *pgp;
+ obd_off off;
+ struct kiobuf *kiobuf;
+ int i;
+ int rc;
+
+ LASSERT (rw == OBD_BRW_WRITE ||
+ rw == OBD_BRW_READ);
+
+ /* NB: for now, only whole pages, page aligned */
+
+ if (count <= 0 ||
+ ((long)buffer & (PAGE_SIZE - 1)) != 0 ||
+ (count & (PAGE_SIZE - 1)) != 0 ||
+ (lsm != NULL && lsm->lsm_object_id != oa->o_id))
+ return (-EINVAL);
+
+ /* XXX think again with misaligned I/O */
+ npages = count >> PAGE_SHIFT;
+
+ OBD_ALLOC(pga, npages * sizeof(*pga));
+ if (pga == NULL)
+ return (-ENOMEM);
+
+ rc = alloc_kiovec (1, &kiobuf);
+ if (rc != 0)
+ goto out_1;
+
+ rc = map_user_kiobuf ((rw == OBD_BRW_READ) ? READ : WRITE,
+ kiobuf, (unsigned long)buffer, count);
+ if (rc != 0)
+ goto out_2;
+
+ LASSERT (kiobuf->offset == 0);
+ LASSERT (kiobuf->nr_pages == npages);
+
+ for (i = 0, off = offset, pgp = pga;
+ i < npages;
+ i++, off += PAGE_SIZE, pgp++) {
+ pgp->disk_offset = pgp->page_offset = off;
+ pgp->pg = kiobuf->maplist[i];
+ pgp->count = PAGE_SIZE;
+ pgp->flag = 0;
+ }
+
+ rc = obd_brw(rw, ec->ec_exp, oa, lsm, npages, pga, oti);
+
+ // if (rw == OBD_BRW_READ)
+ // mark_dirty_kiobuf (kiobuf, count);
+
+ unmap_kiobuf (kiobuf);
+ out_2:
+ free_kiovec (1, &kiobuf);
+ out_1:
+ OBD_FREE(pga, npages * sizeof(*pga));
+ return (rc);
+}
+#else
+static int echo_client_ubrw(struct obd_device *obd, int rw,
+ struct obdo *oa, struct lov_stripe_md *lsm,
+ obd_off offset, obd_size count, char *buffer,
+ struct obd_trans_info *oti)
+{
+#warning "echo_client_ubrw() needs to be ported on 2.6 yet"
+ LBUG();
+ return 0;
+}
+#endif
+#endif
+
+struct echo_async_state;
+
+#define EAP_MAGIC 79277927
+struct echo_async_page {
+ int eap_magic;
+ struct page *eap_page;
+ void *eap_cookie;
+ obd_off eap_off;
+ struct echo_async_state *eap_eas;
+ struct list_head eap_item;
+};
+
+#define EAP_FROM_COOKIE(c) \
+ (LASSERT(((struct echo_async_page *)(c))->eap_magic == EAP_MAGIC), \
+ (struct echo_async_page *)(c))
+
+struct echo_async_state {
+ spinlock_t eas_lock;
+ obd_off eas_next_offset;
+ obd_off eas_end_offset;
+ int eas_in_flight;
+ int eas_rc;
+ wait_queue_head_t eas_waitq;
+ struct list_head eas_avail;
+ struct obdo eas_oa;
+ struct lov_stripe_md *eas_lsm;
+};
+
+static int eas_should_wake(struct echo_async_state *eas)
+{
+ unsigned long flags;
+ int rc = 0;
+ spin_lock_irqsave(&eas->eas_lock, flags);
+ if (eas->eas_rc == 0 && !list_empty(&eas->eas_avail))
+ rc = 1;
+ spin_unlock_irqrestore(&eas->eas_lock, flags);
+ return rc;
+};
+
+static int ec_ap_make_ready(void *data, int cmd)
+{
+ /* our pages are issued ready */
+ LBUG();
+ return 0;
+}
+static int ec_ap_refresh_count(void *data, int cmd)
+{
+ /* our pages are issued with a stable count */
+ LBUG();
+ return PAGE_SIZE;
+}
+static void ec_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
+{
+ struct echo_async_page *eap = EAP_FROM_COOKIE(data);
+
+ memcpy(oa, &eap->eap_eas->eas_oa, sizeof(*oa));
+}
+
+static void ec_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
+{
+ struct echo_async_page *eap = EAP_FROM_COOKIE(data);
+ struct echo_async_state *eas;
+ unsigned long flags;
+
+ eas = eap->eap_eas;
+
+ if (cmd == OBD_BRW_READ &&
+ eas->eas_oa.o_id != ECHO_PERSISTENT_OBJID &&
+ (eas->eas_oa.o_valid & OBD_MD_FLFLAGS) != 0 &&
+ (eas->eas_oa.o_flags & OBD_FL_DEBUG_CHECK) != 0)
+ echo_client_page_debug_check(eas->eas_lsm, eap->eap_page,
+ eas->eas_oa.o_id, eap->eap_off,
+ PAGE_SIZE);
+
+ spin_lock_irqsave(&eas->eas_lock, flags);
+ if (rc && !eas->eas_rc)
+ eas->eas_rc = rc;
+ eas->eas_in_flight--;
+ list_add(&eap->eap_item, &eas->eas_avail);
+ wake_up(&eas->eas_waitq);
+ spin_unlock_irqrestore(&eas->eas_lock, flags);
+}
+
+static struct obd_async_page_ops ec_async_page_ops = {
+ .ap_make_ready = ec_ap_make_ready,
+ .ap_refresh_count = ec_ap_refresh_count,
+ .ap_fill_obdo = ec_ap_fill_obdo,
+ .ap_completion = ec_ap_completion,
+};
+
+static int echo_client_async_page(struct obd_export *exp, int rw,
+ struct obdo *oa, struct lov_stripe_md *lsm,
+ obd_off offset, obd_size count,
+ obd_size batching)
+{
+ obd_count npages, i;
+ struct echo_async_page *eap;
+ struct echo_async_state eas;
+ struct list_head *pos, *n;
+ int rc = 0;
+ unsigned long flags;
+ LIST_HEAD(pages);
+#if 0
+ int verify;
+ int gfp_mask;
+ /* oa_id == 0 => speed test (no verification) else...
+ * oa & 1 => use HIGHMEM
+ */
+ verify = (oa->o_id != 0);
+ gfp_mask = ((oa->o_id & 1) == 0) ? GFP_KERNEL : GFP_HIGHUSER;
+#endif
+
+ LASSERT(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ);
- set = obd_brw_set_new();
- if (set == NULL)
+ if (count <= 0 ||
+ (count & (PAGE_SIZE - 1)) != 0 ||
+ (lsm != NULL &&
+ lsm->lsm_object_id != oa->o_id))
+ return (-EINVAL);
+
+ /* XXX think again with misaligned I/O */
+ npages = batching >> PAGE_SHIFT;
+
+ memcpy(&eas.eas_oa, oa, sizeof(*oa));
+ eas.eas_next_offset = offset;
+ eas.eas_end_offset = offset + count;
+ spin_lock_init(&eas.eas_lock);
+ init_waitqueue_head(&eas.eas_waitq);
+ eas.eas_in_flight = 0;
+ eas.eas_rc = 0;
+ eas.eas_lsm = lsm;
+ INIT_LIST_HEAD(&eas.eas_avail);
+
+ /* prepare the group of pages that we're going to be keeping
+ * in flight */
+ for (i = 0; i < npages; i++) {
+ struct page *page = alloc_page(GFP_KERNEL);
+ if (page == NULL)
GOTO(out, rc = -ENOMEM);
- pages = data->ioc_count / PAGE_SIZE;
- off = data->ioc_offset;
+ page->private = 0;
+ list_add_tail(&PAGE_LIST(page), &pages);
- CDEBUG(D_INODE, "BRW %s with %d pages @ "LPX64"\n",
- rw == OBD_BRW_READ ? "read" : "write", pages, off);
- OBD_ALLOC(pga, pages * sizeof(*pga));
- if (!pga) {
- CERROR("no memory for %d BRW per-page data\n", pages);
- GOTO(brw_free, rc = -ENOMEM);
+ OBD_ALLOC(eap, sizeof(*eap));
+ if (eap == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ eap->eap_magic = EAP_MAGIC;
+ eap->eap_page = page;
+ eap->eap_eas = &eas;
+ page->private = (unsigned long)eap;
+ list_add_tail(&eap->eap_item, &eas.eas_avail);
+ }
+
+ /* first we spin queueing io and being woken by its completion */
+ spin_lock_irqsave(&eas.eas_lock, flags);
+ for(;;) {
+ int rc;
+
+ /* sleep until we have a page to send */
+ spin_unlock_irqrestore(&eas.eas_lock, flags);
+ rc = wait_event_interruptible(eas.eas_waitq,
+ eas_should_wake(&eas));
+ spin_lock_irqsave(&eas.eas_lock, flags);
+ if (rc && !eas.eas_rc)
+ eas.eas_rc = rc;
+ if (eas.eas_rc)
+ break;
+ if (list_empty(&eas.eas_avail))
+ continue;
+ eap = list_entry(eas.eas_avail.next, struct echo_async_page,
+ eap_item);
+ list_del(&eap->eap_item);
+ spin_unlock_irqrestore(&eas.eas_lock, flags);
+
+ /* unbind the eap from its old page offset */
+ if (eap->eap_cookie != NULL) {
+ obd_teardown_async_page(exp, lsm, NULL,
+ eap->eap_cookie);
+ eap->eap_cookie = NULL;
}
- for (j = 0, pgp = pga; j < pages; j++, off += PAGE_SIZE, pgp++){
- pgp->pg = alloc_pages(gfp_mask, 0);
- if (!pgp->pg) {
- CERROR("no memory for brw pages\n");
- GOTO(brw_cleanup, rc = -ENOMEM);
- }
- pgp->count = PAGE_SIZE;
- pgp->off = off;
- pgp->flag = 0;
-
- if (verify) {
- void *addr = kmap(pgp->pg);
-
- if (rw == OBD_BRW_WRITE)
- page_debug_setup(addr, pgp->count,
- pgp->off, id);
- else
- page_debug_setup(addr, pgp->count,
- 0xdeadbeef00c0ffee,
- 0xdeadbeef00c0ffee);
- kunmap(pgp->pg);
- }
+ eas.eas_next_offset += PAGE_SIZE;
+ eap->eap_off = eas.eas_next_offset;
+
+ rc = obd_prep_async_page(exp, lsm, NULL, eap->eap_page,
+ eap->eap_off, &ec_async_page_ops,
+ eap, &eap->eap_cookie);
+ if (rc) {
+ spin_lock_irqsave(&eas.eas_lock, flags);
+ eas.eas_rc = rc;
+ break;
+ }
+
+ if (oa->o_id != ECHO_PERSISTENT_OBJID &&
+ (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
+ (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0)
+ echo_client_page_debug_setup(lsm, eap->eap_page, rw,
+ oa->o_id,
+ eap->eap_off, PAGE_SIZE);
+
+ /* always asserts urgent, which isn't quite right */
+ rc = obd_queue_async_io(exp, lsm, NULL, eap->eap_cookie,
+ rw, 0, PAGE_SIZE, 0,
+ ASYNC_READY | ASYNC_URGENT |
+ ASYNC_COUNT_STABLE);
+ spin_lock_irqsave(&eas.eas_lock, flags);
+ if (rc && !eas.eas_rc) {
+ eas.eas_rc = rc;
+ break;
+ }
+ eas.eas_in_flight++;
+ if (eas.eas_next_offset == eas.eas_end_offset)
+ break;
+ }
+
+ /* still hold the eas_lock here.. */
+
+ /* now we just spin waiting for all the rpcs to complete */
+ while(eas.eas_in_flight) {
+ spin_unlock_irqrestore(&eas.eas_lock, flags);
+ wait_event_interruptible(eas.eas_waitq,
+ eas.eas_in_flight == 0);
+ spin_lock_irqsave(&eas.eas_lock, flags);
+ }
+ spin_unlock_irqrestore(&eas.eas_lock, flags);
+
+out:
+ list_for_each_safe(pos, n, &pages) {
+ struct page *page = list_entry(pos, struct page,
+ PAGE_LIST_ENTRY);
+
+ list_del(&PAGE_LIST(page));
+ if (page->private != 0) {
+ eap = (struct echo_async_page *)page->private;
+ if (eap->eap_cookie != NULL)
+ obd_teardown_async_page(exp, lsm, NULL,
+ eap->eap_cookie);
+ OBD_FREE(eap, sizeof(*eap));
}
+ __free_page(page);
+ }
+
+ RETURN(rc);
+}
+
+static int echo_client_prep_commit(struct obd_export *exp, int rw,
+ struct obdo *oa, struct lov_stripe_md *lsm,
+ obd_off offset, obd_size count,
+ obd_size batch, struct obd_trans_info *oti)
+{
+ struct obd_ioobj ioo;
+ struct niobuf_local *lnb;
+ struct niobuf_remote *rnb;
+ obd_off off;
+ obd_size npages, tot_pages;
+ int i, ret = 0;
+ ENTRY;
+
+ if (count <= 0 || (count & (PAGE_SIZE - 1)) != 0 ||
+ (lsm != NULL && lsm->lsm_object_id != oa->o_id))
+ RETURN(-EINVAL);
+
+ npages = batch >> PAGE_SHIFT;
+ tot_pages = count >> PAGE_SHIFT;
+
+ OBD_ALLOC(lnb, npages * sizeof(struct niobuf_local));
+ OBD_ALLOC(rnb, npages * sizeof(struct niobuf_remote));
+
+ if (lnb == NULL || rnb == NULL)
+ GOTO(out, ret = -ENOMEM);
+
+ obdo_to_ioobj(oa, &ioo);
- set->brw_callback = ll_brw_sync_wait;
- rc = obd_brw(rw, &ec->conn, lsm, j, pga, set);
- if (rc)
- CERROR("test_brw: error from obd_brw: rc = %d\n", rc);
- else {
- rc = ll_brw_sync_wait(set, CB_PHASE_START);
- if (rc)
- CERROR("test_brw: error from callback: rc = "
- "%d\n", rc);
+ off = offset;
+
+ for(; tot_pages; tot_pages -= npages) {
+ if (tot_pages < npages)
+ npages = tot_pages;
+
+ for (i = 0; i < npages; i++, off += PAGE_SIZE) {
+ rnb[i].offset = off;
+ rnb[i].len = PAGE_SIZE;
}
- EXIT;
- brw_cleanup:
- for (j = 0, pgp = pga; j < pages; j++, pgp++) {
- if (pgp->pg == NULL)
+
+ /* XXX this can't be the best.. */
+ memset(oti, 0, sizeof(*oti));
+ ioo.ioo_bufcnt = npages;
+
+ ret = obd_preprw(rw, exp, oa, 1, &ioo, npages, rnb, lnb, oti);
+ if (ret != 0)
+ GOTO(out, ret);
+
+ for (i = 0; i < npages; i++) {
+ struct page *page = lnb[i].page;
+
+ /* read past eof? */
+ if (page == NULL && lnb[i].rc == 0)
continue;
- if (verify && !rc) {
- void *addr = kmap(pgp->pg);
+ if (oa->o_id == ECHO_PERSISTENT_OBJID ||
+ (oa->o_valid & OBD_MD_FLFLAGS) == 0 ||
+ (oa->o_flags & OBD_FL_DEBUG_CHECK) == 0)
+ continue;
- rc = page_debug_check("test_brw", addr,
- PAGE_SIZE, pgp->off, id);
- kunmap(pgp->pg);
- }
- __free_pages(pgp->pg, 0);
+
+ if (rw == OBD_BRW_WRITE)
+ echo_client_page_debug_setup(lsm, page, rw,
+ oa->o_id,
+ rnb[i].offset,
+ rnb[i].len);
+ else
+ echo_client_page_debug_check(lsm, page,
+ oa->o_id,
+ rnb[i].offset,
+ rnb[i].len);
}
- brw_free:
- obd_brw_set_free(set);
- OBD_FREE(pga, pages * sizeof(*pga));
- GOTO(out, rc);
+
+ ret = obd_commitrw(rw, exp, oa, 1, &ioo, npages, lnb, oti, ret);
+ if (ret != 0)
+ GOTO(out, ret);
+ }
+
+out:
+ if (lnb)
+ OBD_FREE(lnb, npages * sizeof(struct niobuf_local));
+ if (rnb)
+ OBD_FREE(rnb, npages * sizeof(struct niobuf_remote));
+ RETURN(ret);
+}
+
+int echo_client_brw_ioctl(int rw, struct obd_export *exp,
+ struct obd_ioctl_data *data)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct echo_client_obd *ec = &obd->u.echocli;
+ struct obd_trans_info dummy_oti;
+ struct ec_object *eco;
+ int rc;
+ ENTRY;
+
+ rc = echo_get_object(&eco, obd, &data->ioc_obdo1);
+ if (rc)
+ RETURN(rc);
+
+ memset(&dummy_oti, 0, sizeof(dummy_oti));
+
+ data->ioc_obdo1.o_valid &= ~OBD_MD_FLHANDLE;
+ data->ioc_obdo1.o_valid |= OBD_MD_FLGROUP;
+ data->ioc_obdo1.o_gr = FILTER_GROUP_ECHO;
+
+ switch((long)data->ioc_pbuf1) {
+ case 1:
+ if (data->ioc_pbuf2 == NULL) { // NULL user data pointer
+ rc = echo_client_kbrw(obd, rw, &data->ioc_obdo1,
+ eco->eco_lsm, data->ioc_offset,
+ data->ioc_count, &dummy_oti);
+ } else {
+#ifdef __KERNEL__
+ rc = echo_client_ubrw(obd, rw, &data->ioc_obdo1,
+ eco->eco_lsm, data->ioc_offset,
+ data->ioc_count, data->ioc_pbuf2,
+ &dummy_oti);
+#endif
+ }
+ break;
+ case 2:
+ rc = echo_client_async_page(ec->ec_exp, rw, &data->ioc_obdo1,
+ eco->eco_lsm, data->ioc_offset,
+ data->ioc_count, data->ioc_plen1);
+ break;
+ case 3:
+ rc = echo_client_prep_commit(ec->ec_exp, rw, &data->ioc_obdo1,
+ eco->eco_lsm, data->ioc_offset,
+ data->ioc_count, data->ioc_plen1,
+ &dummy_oti);
+ break;
+ default:
+ rc = -EINVAL;
+ }
+ echo_put_object(eco);
+ RETURN(rc);
+}
+
+static int
+echo_ldlm_callback (struct ldlm_lock *lock, struct ldlm_lock_desc *new,
+ void *data, int flag)
+{
+ struct ec_object *eco = (struct ec_object *)data;
+ struct echo_client_obd *ec = &(eco->eco_device->u.echocli);
+ struct lustre_handle lockh;
+ struct list_head *el;
+ int found = 0;
+ int rc;
+
+ ldlm_lock2handle (lock, &lockh);
+
+ /* #ifdef this out if we're not feeling paranoid */
+ spin_lock (&ec->ec_lock);
+ list_for_each (el, &ec->ec_objects) {
+ found = (eco == list_entry(el, struct ec_object,
+ eco_obj_chain));
+ if (found)
+ break;
}
+ spin_unlock (&ec->ec_lock);
+ LASSERT (found);
+
+ switch (flag) {
+ case LDLM_CB_BLOCKING:
+ CDEBUG(D_INFO, "blocking callback on "LPX64", handle "LPX64"\n",
+ eco->eco_id, lockh.cookie);
+ rc = ldlm_cli_cancel (&lockh);
+ if (rc != ELDLM_OK)
+ CERROR ("ldlm_cli_cancel failed: %d\n", rc);
+ break;
+
+ case LDLM_CB_CANCELING:
+ CDEBUG(D_INFO, "cancel callback on "LPX64", handle "LPX64"\n",
+ eco->eco_id, lockh.cookie);
+ break;
+
default:
- return -ENOTTY;
+ LBUG ();
}
+ return (0);
+}
+
+static int
+echo_client_enqueue(struct obd_export *exp, struct obdo *oa,
+ int mode, obd_off offset, obd_size nob)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct echo_client_obd *ec = &obd->u.echocli;
+ struct lustre_handle *ulh = obdo_handle (oa);
+ struct ec_object *eco;
+ struct ec_lock *ecl;
+ int flags;
+ int rc;
+
+ if (!(mode == LCK_PR || mode == LCK_PW))
+ return -EINVAL;
+
+ if ((offset & (PAGE_SIZE - 1)) != 0 ||
+ (nob & (PAGE_SIZE - 1)) != 0)
+ return -EINVAL;
+
+ rc = echo_get_object (&eco, obd, oa);
+ if (rc != 0)
+ return rc;
+
+ rc = -ENOMEM;
+ OBD_ALLOC (ecl, sizeof (*ecl));
+ if (ecl == NULL)
+ goto failed_0;
+
+ ecl->ecl_mode = mode;
+ ecl->ecl_object = eco;
+ ecl->ecl_policy.l_extent.start = offset;
+ ecl->ecl_policy.l_extent.end =
+ (nob == 0) ? ((obd_off) -1) : (offset + nob - 1);
+
+ flags = 0;
+ rc = obd_enqueue(ec->ec_exp, eco->eco_lsm, LDLM_EXTENT,
+ &ecl->ecl_policy, mode, &flags, echo_ldlm_callback,
+ ldlm_completion_ast, NULL, eco, sizeof(struct ost_lvb),
+ lustre_swab_ost_lvb, &ecl->ecl_lock_handle);
+ if (rc != 0)
+ goto failed_1;
+
+ CDEBUG(D_INFO, "enqueue handle "LPX64"\n", ecl->ecl_lock_handle.cookie);
+
+ /* NB ecl takes object ref from echo_get_object() above */
+ spin_lock(&ec->ec_lock);
+
+ list_add(&ecl->ecl_exp_chain, &exp->exp_ec_data.eced_locks);
+ ulh->cookie = ecl->ecl_cookie = ec->ec_unique++;
+
+ spin_unlock(&ec->ec_lock);
+
+ oa->o_valid |= OBD_MD_FLHANDLE;
+ return 0;
+
+ failed_1:
+ OBD_FREE (ecl, sizeof (*ecl));
+ failed_0:
+ echo_put_object (eco);
+ return (rc);
+}
+
+static int
+echo_client_cancel(struct obd_export *exp, struct obdo *oa)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct echo_client_obd *ec = &obd->u.echocli;
+ struct lustre_handle *ulh = obdo_handle (oa);
+ struct ec_lock *ecl = NULL;
+ int found = 0;
+ struct list_head *el;
+ int rc;
+
+ if ((oa->o_valid & OBD_MD_FLHANDLE) == 0)
+ return -EINVAL;
+
+ spin_lock (&ec->ec_lock);
+
+ list_for_each (el, &exp->exp_ec_data.eced_locks) {
+ ecl = list_entry (el, struct ec_lock, ecl_exp_chain);
+ found = (ecl->ecl_cookie == ulh->cookie);
+ if (found) {
+ list_del (&ecl->ecl_exp_chain);
+ break;
+ }
+ }
+
+ spin_unlock (&ec->ec_lock);
+
+ if (!found)
+ return (-ENOENT);
+
+ rc = obd_cancel(ec->ec_exp, ecl->ecl_object->eco_lsm, ecl->ecl_mode,
+ &ecl->ecl_lock_handle);
+
+ echo_put_object (ecl->ecl_object);
+ OBD_FREE (ecl, sizeof (*ecl));
+
+ return rc;
+}
+
+static int
+echo_client_iocontrol(unsigned int cmd, struct obd_export *exp,
+ int len, void *karg, void *uarg)
+{
+ struct obd_device *obd;
+ struct echo_client_obd *ec;
+ struct ec_object *eco;
+ struct obd_ioctl_data *data = karg;
+ struct obd_trans_info dummy_oti;
+ struct oti_req_ack_lock *ack_lock;
+ struct obdo *oa;
+ int rw = OBD_BRW_READ;
+ int rc = 0;
+ int i;
+ ENTRY;
+
+ unlock_kernel();
+
+ memset(&dummy_oti, 0, sizeof(dummy_oti));
+
+ obd = exp->exp_obd;
+ ec = &obd->u.echocli;
+
+ switch (cmd) {
+ case OBD_IOC_CREATE: /* may create echo object */
+ if (!capable (CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ rc = echo_create_object (obd, 1, &data->ioc_obdo1,
+ data->ioc_pbuf1, data->ioc_plen1,
+ &dummy_oti);
+ GOTO(out, rc);
+
+ case OBD_IOC_DESTROY:
+ if (!capable (CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ rc = echo_get_object (&eco, obd, &data->ioc_obdo1);
+ if (rc == 0) {
+ oa = &data->ioc_obdo1;
+ oa->o_gr = FILTER_GROUP_ECHO;
+ oa->o_valid |= OBD_MD_FLGROUP;
+ rc = obd_destroy(ec->ec_exp, oa, eco->eco_lsm,
+ &dummy_oti);
+ if (rc == 0)
+ eco->eco_deleted = 1;
+ echo_put_object(eco);
+ }
+ GOTO(out, rc);
+
+ case OBD_IOC_GETATTR:
+ rc = echo_get_object (&eco, obd, &data->ioc_obdo1);
+ if (rc == 0) {
+ rc = obd_getattr(ec->ec_exp, &data->ioc_obdo1,
+ eco->eco_lsm);
+ echo_put_object(eco);
+ }
+ GOTO(out, rc);
+
+ case OBD_IOC_SETATTR:
+ if (!capable (CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ rc = echo_get_object (&eco, obd, &data->ioc_obdo1);
+ if (rc == 0) {
+ rc = obd_setattr(ec->ec_exp, &data->ioc_obdo1,
+ eco->eco_lsm, NULL);
+ echo_put_object(eco);
+ }
+ GOTO(out, rc);
+
+ case OBD_IOC_BRW_WRITE:
+ if (!capable (CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ rw = OBD_BRW_WRITE;
+ /* fall through */
+ case OBD_IOC_BRW_READ:
+ rc = echo_client_brw_ioctl(rw, exp, data);
+ GOTO(out, rc);
+
+ case ECHO_IOC_GET_STRIPE:
+ rc = echo_get_object(&eco, obd, &data->ioc_obdo1);
+ if (rc == 0) {
+ rc = echo_copyout_lsm(eco->eco_lsm, data->ioc_pbuf1,
+ data->ioc_plen1);
+ echo_put_object(eco);
+ }
+ GOTO(out, rc);
+
+ case ECHO_IOC_SET_STRIPE:
+ if (!capable (CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ if (data->ioc_pbuf1 == NULL) { /* unset */
+ rc = echo_get_object(&eco, obd, &data->ioc_obdo1);
+ if (rc == 0) {
+ eco->eco_deleted = 1;
+ echo_put_object(eco);
+ }
+ } else {
+ rc = echo_create_object(obd, 0, &data->ioc_obdo1,
+ data->ioc_pbuf1,
+ data->ioc_plen1, &dummy_oti);
+ }
+ GOTO (out, rc);
+
+ case ECHO_IOC_ENQUEUE:
+ if (!capable (CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ rc = echo_client_enqueue(exp, &data->ioc_obdo1,
+ data->ioc_conn1, /* lock mode */
+ data->ioc_offset, data->ioc_count);/*extent*/
+ GOTO (out, rc);
+
+ case ECHO_IOC_CANCEL:
+ rc = echo_client_cancel(exp, &data->ioc_obdo1);
+ GOTO (out, rc);
+
+ default:
+ CERROR ("echo_ioctl(): unrecognised ioctl %#x\n", cmd);
+ GOTO (out, rc = -ENOTTY);
+ }
+
+ EXIT;
out:
- RETURN(rc);
+
+ /* XXX this should be in a helper also called by target_send_reply */
+ for (ack_lock = dummy_oti.oti_ack_locks, i = 0; i < 4;
+ i++, ack_lock++) {
+ if (!ack_lock->mode)
+ break;
+ ldlm_lock_decref(&ack_lock->lock, ack_lock->mode);
+ }
+
+ lock_kernel();
+
+ return rc;
}
-static int echo_setup(struct obd_device *obddev, obd_count len, void *buf)
+static int
+echo_client_setup(struct obd_device *obddev, obd_count len, void *buf)
{
- struct obd_ioctl_data* data = buf;
- struct echo_client_obd *ec = &obddev->u.echo_client;
+ struct lustre_cfg* lcfg = buf;
+ struct echo_client_obd *ec = &obddev->u.echocli;
struct obd_device *tgt;
+ struct lustre_handle conn = {0, };
+ struct obd_uuid echo_uuid = { "ECHO_UUID" };
int rc;
ENTRY;
- if (data->ioc_inllen1 < 1) {
- CERROR("requires a TARGET OBD UUID\n");
+ if (lcfg->lcfg_inllen1 < 1) {
+ CERROR("requires a TARGET OBD name\n");
RETURN(-EINVAL);
}
- if (data->ioc_inllen1 > 37) {
- CERROR("OBD UUID must be less than 38 characters\n");
+
+ tgt = class_name2obd(lcfg->lcfg_inlbuf1);
+ if (!tgt || !tgt->obd_attached || !tgt->obd_set_up) {
+ CERROR("device not attached or not set up (%s)\n",
+ lcfg->lcfg_inlbuf1);
RETURN(-EINVAL);
}
- MOD_INC_USE_COUNT;
- tgt = class_uuid2obd(data->ioc_inlbuf1);
- if (!tgt || !(tgt->obd_flags & OBD_ATTACHED) ||
- !(tgt->obd_flags & OBD_SET_UP)) {
- CERROR("device not attached or not set up (%d)\n",
- data->ioc_dev);
- GOTO(error_dec, rc = -EINVAL);
- }
+ spin_lock_init (&ec->ec_lock);
+ INIT_LIST_HEAD (&ec->ec_objects);
+ ec->ec_unique = 0;
- rc = obd_connect(&ec->conn, tgt, NULL, NULL, NULL);
+ rc = obd_connect(&conn, tgt, &echo_uuid, NULL, FILTER_GROUP_ECHO);
if (rc) {
- CERROR("fail to connect to device %d\n", data->ioc_dev);
- GOTO(error_dec, rc = -EINVAL);
+ CERROR("fail to connect to device %s\n", lcfg->lcfg_inlbuf1);
+ return (rc);
}
- RETURN(rc);
-error_dec:
- MOD_DEC_USE_COUNT;
+ ec->ec_exp = class_conn2export(&conn);
+
RETURN(rc);
}
-static int echo_cleanup(struct obd_device * obddev)
+static int echo_client_cleanup(struct obd_device *obddev, int flags)
{
- struct echo_client_obd *ec = &obddev->u.echo_client;
+ struct list_head *el;
+ struct ec_object *eco;
+ struct echo_client_obd *ec = &obddev->u.echocli;
int rc;
ENTRY;
RETURN(-EBUSY);
}
- rc = obd_disconnect(&ec->conn);
- if (rc) {
+ /* XXX assuming sole access */
+ while (!list_empty(&ec->ec_objects)) {
+ el = ec->ec_objects.next;
+ eco = list_entry(el, struct ec_object, eco_obj_chain);
+
+ LASSERT(eco->eco_refcount == 0);
+ eco->eco_refcount = 1;
+ eco->eco_deleted = 1;
+ echo_put_object(eco);
+ }
+
+ rc = obd_disconnect(ec->ec_exp, 0);
+ if (rc != 0)
CERROR("fail to disconnect device: %d\n", rc);
- RETURN(-EINVAL);
+
+ RETURN(rc);
+}
+
+static int echo_client_connect(struct lustre_handle *conn,
+ struct obd_device *src,
+ struct obd_uuid *cluuid,
+ struct obd_connect_data *data,
+ unsigned long flags)
+{
+ struct obd_export *exp;
+ int rc;
+
+ rc = class_connect(conn, src, cluuid);
+ if (rc == 0) {
+ exp = class_conn2export(conn);
+ INIT_LIST_HEAD(&exp->exp_ec_data.eced_locks);
+ class_export_put(exp);
}
- MOD_DEC_USE_COUNT;
- RETURN(0);
+ RETURN (rc);
}
-static int echo_connect(struct lustre_handle *conn, struct obd_device *src,
- obd_uuid_t cluuid, struct recovd_obd *recovd,
- ptlrpc_recovery_cb_t recover)
+static int echo_client_disconnect(struct obd_export *exp,
+ unsigned long flags)
{
- return class_connect(conn, src, cluuid);
+ struct obd_device *obd;
+ struct echo_client_obd *ec;
+ struct ec_lock *ecl;
+ int rc;
+ ENTRY;
+
+ if (exp == NULL)
+ GOTO(out, rc = -EINVAL);
+
+ obd = exp->exp_obd;
+ ec = &obd->u.echocli;
+
+ /* no more contention on export's lock list */
+ while (!list_empty (&exp->exp_ec_data.eced_locks)) {
+ ecl = list_entry (exp->exp_ec_data.eced_locks.next,
+ struct ec_lock, ecl_exp_chain);
+ list_del (&ecl->ecl_exp_chain);
+
+ rc = obd_cancel(ec->ec_exp, ecl->ecl_object->eco_lsm,
+ ecl->ecl_mode, &ecl->ecl_lock_handle);
+
+ CDEBUG (D_INFO, "Cancel lock on object "LPX64" on disconnect "
+ "(%d)\n", ecl->ecl_object->eco_id, rc);
+
+ echo_put_object (ecl->ecl_object);
+ OBD_FREE (ecl, sizeof (*ecl));
+ }
+
+ rc = class_disconnect(exp, 0);
+ GOTO(out, rc);
+ out:
+ return rc;
}
static struct obd_ops echo_obd_ops = {
- o_setup: echo_setup,
- o_cleanup: echo_cleanup,
- o_iocontrol: echo_iocontrol,
- o_connect: echo_connect,
- o_disconnect: class_disconnect
+ .o_owner = THIS_MODULE,
+ .o_setup = echo_client_setup,
+ .o_cleanup = echo_client_cleanup,
+ .o_iocontrol = echo_client_iocontrol,
+ .o_connect = echo_client_connect,
+ .o_disconnect = echo_client_disconnect
};
int echo_client_init(void)
{
- extern struct lprocfs_vars status_class_var[];
+ struct lprocfs_static_vars lvars;
- return class_register_type(&echo_obd_ops, status_class_var,
+ lprocfs_init_vars(echo, &lvars);
+ return class_register_type(&echo_obd_ops, NULL, lvars.module_vars,
OBD_ECHO_CLIENT_DEVICENAME);
}
-void echo_client_cleanup(void)
+void echo_client_exit(void)
{
class_unregister_type(OBD_ECHO_CLIENT_DEVICENAME);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff