RETURN(rc);
}
-struct mdd_changelog_user_data {
- __u64 mcud_endrec; /**< purge record for this user */
- __u64 mcud_minrec; /**< lowest changelog recno still referenced */
- __u32 mcud_id;
- __u32 mcud_minid; /**< user id with lowest rec reference */
- __u32 mcud_usercount;
- unsigned int mcud_found:1;
+struct mdd_changelog_user_purge {
+ __u32 mcup_id;
+ __u32 mcup_usercount;
+ __u64 mcup_minrec;
+ bool mcup_found;
};
-#define MCUD_UNREGISTER -1LL
-/** Two things:
- * 1. Find the smallest record everyone is willing to purge
- * 2. Update the last purgeable record for this user
+/**
+ * changelog_user_purge callback
+ *
+ * Is called once per user.
+ *
+ * Check to see the user requested is available from rec.
+ * Truncate the changelog.
+ * Keep track of the total number of users (calls).
*/
static int mdd_changelog_user_purge_cb(const struct lu_env *env,
struct llog_handle *llh,
struct llog_rec_hdr *hdr, void *data)
{
struct llog_changelog_user_rec *rec;
- struct mdd_changelog_user_data *mcud = data;
+ struct mdd_changelog_user_purge *mcup = data;
+ struct llog_cookie cookie;
int rc;
- ENTRY;
+ ENTRY;
- LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
+ if ((llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN) == 0)
+ RETURN(-ENXIO);
- rec = (struct llog_changelog_user_rec *)hdr;
+ rec = container_of(hdr, struct llog_changelog_user_rec, cur_hdr);
- mcud->mcud_usercount++;
+ mcup->mcup_usercount++;
- /* If we have a new endrec for this id, use it for the following
- min check instead of its old value */
- if (rec->cur_id == mcud->mcud_id)
- rec->cur_endrec = max(rec->cur_endrec, mcud->mcud_endrec);
+ if (rec->cur_id != mcup->mcup_id) {
+ /* truncate to the lowest endrec that is not this user */
+ mcup->mcup_minrec = min(mcup->mcup_minrec,
+ rec->cur_endrec);
+ RETURN(0);
+ }
- /* Track the minimum referenced record */
- if (mcud->mcud_minid == 0 || mcud->mcud_minrec > rec->cur_endrec) {
- mcud->mcud_minid = rec->cur_id;
- mcud->mcud_minrec = rec->cur_endrec;
- }
+ /* Unregister this user */
+ cookie.lgc_lgl = llh->lgh_id;
+ cookie.lgc_index = hdr->lrh_index;
- if (rec->cur_id != mcud->mcud_id)
- RETURN(0);
+ rc = llog_cat_cancel_records(env, llh->u.phd.phd_cat_handle,
+ 1, &cookie);
+ if (rc == 0) {
+ mcup->mcup_found = true;
+ mcup->mcup_usercount--;
+ }
- /* Update this user's record */
- mcud->mcud_found = 1;
+ RETURN(rc);
+}
- /* Special case: unregister this user */
- if (mcud->mcud_endrec == MCUD_UNREGISTER) {
- struct llog_cookie cookie;
+static int mdd_changelog_user_purge(const struct lu_env *env,
+ struct mdd_device *mdd, __u32 id)
+{
+ struct mdd_changelog_user_purge mcup = {
+ .mcup_id = id,
+ .mcup_found = false,
+ .mcup_usercount = 0,
+ .mcup_minrec = ULLONG_MAX,
+ };
+ struct llog_ctxt *ctxt;
+ int rc;
- cookie.lgc_lgl = llh->lgh_id;
- cookie.lgc_index = hdr->lrh_index;
+ ENTRY;
- rc = llog_cat_cancel_records(env, llh->u.phd.phd_cat_handle,
- 1, &cookie);
- if (rc == 0)
- mcud->mcud_usercount--;
+ CDEBUG(D_IOCTL, "%s: Purge request: id=%u\n",
+ mdd2obd_dev(mdd)->obd_name, id);
- RETURN(rc);
- }
+ ctxt = llog_get_context(mdd2obd_dev(mdd),
+ LLOG_CHANGELOG_USER_ORIG_CTXT);
+ if (ctxt == NULL ||
+ (ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) == 0)
+ GOTO(out, rc = -ENXIO);
+
+ rc = llog_cat_process(env, ctxt->loc_handle,
+ mdd_changelog_user_purge_cb, &mcup,
+ 0, 0);
+
+ if ((rc == 0) && mcup.mcup_found) {
+ CDEBUG(D_IOCTL, "%s: Purging changelog entries for user %d "
+ "record=%llu\n",
+ mdd2obd_dev(mdd)->obd_name, id, mcup.mcup_minrec);
+ /* Cancelling record 0 destroys the entire changelog, make sure
+ we don't do that unless we mean it. */
+ if (mcup.mcup_minrec != 0 || mcup.mcup_usercount == 0) {
+ rc = mdd_changelog_llog_cancel(env, mdd,
+ mcup.mcup_minrec);
+ }
+ } else {
+ CWARN("%s: No changelog for user %u; rc=%d\n",
+ mdd2obd_dev(mdd)->obd_name, id, rc);
+ GOTO(out, rc = -ENOENT);
+ }
+
+ if ((rc == 0) && (mcup.mcup_usercount == 0)) {
+ /* No more users; turn changelogs off */
+ CDEBUG(D_IOCTL, "turning off changelogs\n");
+ rc = mdd_changelog_off(env, mdd);
+ }
+
+ EXIT;
+out:
+ if (ctxt != NULL)
+ llog_ctxt_put(ctxt);
+
+ return rc;
+}
+
+struct mdd_changelog_user_clear {
+ __u64 mcuc_endrec;
+ __u64 mcuc_minrec;
+ __u32 mcuc_id;
+ bool mcuc_flush;
+};
+
+/**
+ * changelog_clear callback
+ *
+ * Is called once per user.
+ *
+ * Check to see the user requested is available from rec.
+ * Check the oldest (smallest) record for boundary conditions.
+ * Truncate the changelog.
+ */
+static int mdd_changelog_clear_cb(const struct lu_env *env,
+ struct llog_handle *llh,
+ struct llog_rec_hdr *hdr,
+ void *data)
+{
+ struct llog_changelog_user_rec *rec;
+ struct mdd_changelog_user_clear *mcuc = data;
+ int rc;
+
+ ENTRY;
+
+ if ((llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN) == 0)
+ RETURN(-ENXIO);
+
+ rec = container_of(hdr, struct llog_changelog_user_rec, cur_hdr);
+
+ /* Does the changelog id match the requested id? */
+ if (rec->cur_id != mcuc->mcuc_id) {
+ mcuc->mcuc_minrec = min(mcuc->mcuc_minrec,
+ rec->cur_endrec);
+ RETURN(0);
+ }
+
+ /* cur_endrec is the oldest purgeable record, make sure we're newer */
+ if (rec->cur_endrec > mcuc->mcuc_endrec) {
+ CDEBUG(D_IOCTL, "Request %llu out of range: %llu\n",
+ mcuc->mcuc_endrec, rec->cur_endrec);
+ RETURN(-EINVAL);
+ }
+
+ /* Flag that we've met all the range and user checks.
+ * We now know the record to flush.
+ */
+ rec->cur_endrec = mcuc->mcuc_endrec;
+ mcuc->mcuc_flush = true;
- /* Update the endrec */
- CDEBUG(D_IOCTL, "Rewriting changelog user %d endrec to %llu\n",
- mcud->mcud_id, rec->cur_endrec);
+ CDEBUG(D_IOCTL, "Rewriting changelog user %u endrec to %llu\n",
+ mcuc->mcuc_id, rec->cur_endrec);
+ /* Update the endrec */
rc = llog_write(env, llh, hdr, hdr->lrh_index);
- RETURN(rc);
+ RETURN(rc);
}
-static int mdd_changelog_user_purge(const struct lu_env *env,
- struct mdd_device *mdd, int id,
- long long endrec)
+/**
+ * Clear a changelog up to entry specified by endrec for user id.
+ */
+static int mdd_changelog_clear(const struct lu_env *env,
+ struct mdd_device *mdd, __u32 id,
+ __u64 endrec)
{
- struct mdd_changelog_user_data data;
- struct llog_ctxt *ctxt;
- int rc;
- ENTRY;
+ struct mdd_changelog_user_clear mcuc = {
+ .mcuc_id = id,
+ .mcuc_minrec = endrec,
+ .mcuc_flush = false,
+ };
+ struct llog_ctxt *ctxt;
+ __u64 start_rec;
+ int rc;
- CDEBUG(D_IOCTL, "Purge request: id=%d, endrec=%lld\n", id, endrec);
+ ENTRY;
- data.mcud_id = id;
- data.mcud_minid = 0;
- data.mcud_minrec = 0;
- data.mcud_usercount = 0;
- data.mcud_endrec = endrec;
+ CDEBUG(D_IOCTL, "%s: Purge request: id=%u, endrec=%llu\n",
+ mdd2obd_dev(mdd)->obd_name, id, endrec);
+ /* start_rec is the newest (largest value) entry in the changelogs*/
spin_lock(&mdd->mdd_cl.mc_lock);
- endrec = mdd->mdd_cl.mc_index;
+ start_rec = mdd->mdd_cl.mc_index;
spin_unlock(&mdd->mdd_cl.mc_lock);
- if ((data.mcud_endrec == 0) ||
- ((data.mcud_endrec > endrec) &&
- (data.mcud_endrec != MCUD_UNREGISTER)))
- data.mcud_endrec = endrec;
- ctxt = llog_get_context(mdd2obd_dev(mdd),
- LLOG_CHANGELOG_USER_ORIG_CTXT);
- if (ctxt == NULL)
- return -ENXIO;
+ if (start_rec < endrec) {
+ CDEBUG(D_IOCTL, "%s: Could not clear changelog, requested "\
+ "address out of range\n", mdd2obd_dev(mdd)->obd_name);
+ RETURN(-EINVAL);
+ }
- LASSERT(ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
+ if (endrec == 0) {
+ mcuc.mcuc_endrec = start_rec;
+ mcuc.mcuc_minrec = ULLONG_MAX;
+ } else {
+ mcuc.mcuc_endrec = endrec;
+ }
+
+ ctxt = llog_get_context(mdd2obd_dev(mdd),
+ LLOG_CHANGELOG_USER_ORIG_CTXT);
+ if (ctxt == NULL ||
+ (ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) == 0)
+ GOTO(out, rc = -ENXIO);
rc = llog_cat_process(env, ctxt->loc_handle,
- mdd_changelog_user_purge_cb, (void *)&data,
+ mdd_changelog_clear_cb, (void *)&mcuc,
0, 0);
- if ((rc >= 0) && (data.mcud_minrec > 0)) {
- CDEBUG(D_IOCTL, "Purging changelog entries up to %lld"
- ", referenced by "CHANGELOG_USER_PREFIX"%d\n",
- data.mcud_minrec, data.mcud_minid);
- rc = mdd_changelog_llog_cancel(env, mdd, data.mcud_minrec);
- } else {
- CWARN("Could not determine changelog records to purge; rc=%d\n",
- rc);
- }
-
- llog_ctxt_put(ctxt);
- if (!data.mcud_found) {
- CWARN("No entry for user %d. Last changelog reference is "
- "%lld by changelog user %d\n", data.mcud_id,
- data.mcud_minrec, data.mcud_minid);
- rc = -ENOENT;
- }
+ if (rc < 0) {
+ CWARN("%s: Failure to clear the changelog for user %d: %d\n",
+ mdd2obd_dev(mdd)->obd_name, id, rc);
+ } else if (mcuc.mcuc_flush) {
+ /* Cancelling record 0 destroys the entire changelog, make sure
+ we don't do that unless we mean it. */
+ if (mcuc.mcuc_minrec != 0) {
+ CDEBUG(D_IOCTL, "%s: Purging changelog entries up "\
+ "to %llu\n", mdd2obd_dev(mdd)->obd_name,
+ mcuc.mcuc_minrec);
+
+ rc = mdd_changelog_llog_cancel(env, mdd,
+ mcuc.mcuc_minrec);
+ }
+ } else {
+ CWARN("%s: No entry for user %d\n",
+ mdd2obd_dev(mdd)->obd_name, id);
+ rc = -ENOENT;
+ }
- if (!rc && data.mcud_usercount == 0)
- /* No more users; turn changelogs off */
- rc = mdd_changelog_off(env, mdd);
+ EXIT;
+out:
+ if (ctxt != NULL)
+ llog_ctxt_put(ctxt);
- RETURN(rc);
+ return rc;
}
/** mdd_iocontrol
static int mdd_iocontrol(const struct lu_env *env, struct md_device *m,
unsigned int cmd, int len, void *karg)
{
- struct mdd_device *mdd;
- struct obd_ioctl_data *data = karg;
- int rc;
- ENTRY;
+ struct mdd_device *mdd;
+ struct obd_ioctl_data *data = karg;
+ int rc;
- mdd = lu2mdd_dev(&m->md_lu_dev);
+ ENTRY;
- /* Doesn't use obd_ioctl_data */
- switch (cmd) {
- case OBD_IOC_CHANGELOG_CLEAR: {
- struct changelog_setinfo *cs = karg;
- rc = mdd_changelog_user_purge(env, mdd, cs->cs_id,
- cs->cs_recno);
- RETURN(rc);
- }
- case OBD_IOC_GET_MNTOPT: {
- mntopt_t *mntopts = (mntopt_t *)karg;
- *mntopts = mdd->mdd_dt_conf.ddp_mntopts;
- RETURN(0);
- }
+ mdd = lu2mdd_dev(&m->md_lu_dev);
+
+ /* Doesn't use obd_ioctl_data */
+ switch (cmd) {
+ case OBD_IOC_CHANGELOG_CLEAR: {
+ struct changelog_setinfo *cs = karg;
+ rc = mdd_changelog_clear(env, mdd, cs->cs_id,
+ cs->cs_recno);
+ RETURN(rc);
+ }
+ case OBD_IOC_GET_MNTOPT: {
+ mntopt_t *mntopts = (mntopt_t *)karg;
+ *mntopts = mdd->mdd_dt_conf.ddp_mntopts;
+ RETURN(0);
+ }
case OBD_IOC_START_LFSCK: {
rc = lfsck_start(env, mdd->mdd_bottom,
(struct lfsck_start_param *)karg);
}
}
- /* Below ioctls use obd_ioctl_data */
- if (len != sizeof(*data)) {
- CERROR("Bad ioctl size %d\n", len);
- RETURN(-EINVAL);
- }
- if (data->ioc_version != OBD_IOCTL_VERSION) {
- CERROR("Bad magic %x != %x\n", data->ioc_version,
- OBD_IOCTL_VERSION);
- RETURN(-EINVAL);
- }
+ /* Below ioctls use obd_ioctl_data */
+ if (len != sizeof(*data)) {
+ CERROR("Bad ioctl size %d\n", len);
+ RETURN(-EINVAL);
+ }
+ if (data->ioc_version != OBD_IOCTL_VERSION) {
+ CERROR("Bad magic %x != %x\n", data->ioc_version,
+ OBD_IOCTL_VERSION);
+ RETURN(-EINVAL);
+ }
- switch (cmd) {
- case OBD_IOC_CHANGELOG_REG:
- rc = mdd_changelog_user_register(env, mdd, &data->ioc_u32_1);
- break;
- case OBD_IOC_CHANGELOG_DEREG:
- rc = mdd_changelog_user_purge(env, mdd, data->ioc_u32_1,
- MCUD_UNREGISTER);
- break;
- default:
- rc = -ENOTTY;
- }
+ switch (cmd) {
+ case OBD_IOC_CHANGELOG_REG:
+ rc = mdd_changelog_user_register(env, mdd, &data->ioc_u32_1);
+ break;
+ case OBD_IOC_CHANGELOG_DEREG:
+ rc = mdd_changelog_user_purge(env, mdd, data->ioc_u32_1);
+ break;
+ default:
+ rc = -ENOTTY;
+ }
- RETURN (rc);
+ RETURN(rc);
}
/* type constructor/destructor: mdd_type_init, mdd_type_fini */
git://git.whamcloud.com / fs / lustre-release.git / commitdiff