X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fmdd%2Fmdd_device.c;h=ac8133a2d12b1a3768e69fb1bfcefd99b65c1eb2;hp=5e9676529892785e6b7989f79cc1f51a5e72edb6;hb=b8785c155c81701a6e0d0ef397a347365e7de504;hpb=1f0bd15062671c453ec5733663a33aa1bee47e50;ds=sidebyside diff --git a/lustre/mdd/mdd_device.c b/lustre/mdd/mdd_device.c index 5e96765..ac8133a 100644 --- a/lustre/mdd/mdd_device.c +++ b/lustre/mdd/mdd_device.c @@ -53,16 +53,23 @@ #include #include +#include +#include #include #include #include +#include /* for changelogs */ #include +#include #include "mdd_internal.h" -struct md_device_operations mdd_ops; +const struct md_device_operations mdd_ops; +static struct lu_device_type mdd_device_type; + +static const char mdd_root_dir_name[] = "ROOT"; +static const char mdd_obf_dir_name[] = "fid"; -static const char *mdd_root_dir_name = "root"; static int mdd_device_init(const struct lu_env *env, struct lu_device *d, const char *name, struct lu_device *next) { @@ -77,6 +84,7 @@ static int mdd_device_init(const struct lu_env *env, struct lu_device *d, mdd->mdd_txn_cb.dtc_txn_stop = mdd_txn_stop_cb; mdd->mdd_txn_cb.dtc_txn_commit = mdd_txn_commit_cb; mdd->mdd_txn_cb.dtc_cookie = mdd; + mdd->mdd_txn_cb.dtc_tag = LCT_MD_THREAD; CFS_INIT_LIST_HEAD(&mdd->mdd_txn_cb.dtc_linkage); mdd->mdd_atime_diff = MAX_ATIME_DIFF; @@ -87,7 +95,7 @@ static int mdd_device_init(const struct lu_env *env, struct lu_device *d, static struct lu_device *mdd_device_fini(const struct lu_env *env, struct lu_device *d) { - struct mdd_device *mdd = lu2mdd_dev(d); + struct mdd_device *mdd = lu2mdd_dev(d); struct lu_device *next = &mdd->mdd_child->dd_lu_dev; int rc; @@ -99,30 +107,19 @@ static struct lu_device *mdd_device_fini(const struct lu_env *env, return next; } -static int mdd_mount(const struct lu_env *env, struct mdd_device *mdd) -{ - int rc; - struct dt_object *root; - ENTRY; - - dt_txn_callback_add(mdd->mdd_child, &mdd->mdd_txn_cb); - root = dt_store_open(env, mdd->mdd_child, mdd_root_dir_name, - &mdd->mdd_root_fid); - if (!IS_ERR(root)) { - LASSERT(root != NULL); - lu_object_put(env, &root->do_lu); - rc = orph_index_init(env, mdd); - } else - rc = PTR_ERR(root); - - RETURN(rc); -} +static void mdd_changelog_fini(const struct lu_env *env, + struct mdd_device *mdd); static void mdd_device_shutdown(const struct lu_env *env, struct mdd_device *m, struct lustre_cfg *cfg) { ENTRY; + mdd_changelog_fini(env, m); dt_txn_callback_del(m->mdd_child, &m->mdd_txn_cb); + if (m->mdd_dot_lustre_objs.mdd_obf) + mdd_object_put(env, m->mdd_dot_lustre_objs.mdd_obf); + if (m->mdd_dot_lustre) + mdd_object_put(env, m->mdd_dot_lustre); if (m->mdd_obd_dev) mdd_fini_obd(env, m, cfg); orph_index_fini(env, m); @@ -131,6 +128,685 @@ static void mdd_device_shutdown(const struct lu_env *env, EXIT; } +static int changelog_init_cb(struct llog_handle *llh, struct llog_rec_hdr *hdr, + void *data) +{ + struct mdd_device *mdd = (struct mdd_device *)data; + struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr; + ENTRY; + + LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN); + LASSERT(rec->cr_hdr.lrh_type == CHANGELOG_REC); + + CDEBUG(D_INFO, + "seeing record at index %d/%d/"LPU64" t=%x %.*s in log "LPX64"\n", + hdr->lrh_index, rec->cr_hdr.lrh_index, rec->cr_index, + rec->cr_type, rec->cr_namelen, rec->cr_name, + llh->lgh_id.lgl_oid); + + mdd->mdd_cl.mc_index = rec->cr_index; + RETURN(LLOG_PROC_BREAK); +} + +static int changelog_user_init_cb(struct llog_handle *llh, + struct llog_rec_hdr *hdr, void *data) +{ + struct mdd_device *mdd = (struct mdd_device *)data; + struct llog_changelog_user_rec *rec = + (struct llog_changelog_user_rec *)hdr; + ENTRY; + + LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN); + LASSERT(rec->cur_hdr.lrh_type == CHANGELOG_USER_REC); + + CDEBUG(D_INFO, "seeing user at index %d/%d id=%d endrec="LPU64 + " in log "LPX64"\n", hdr->lrh_index, rec->cur_hdr.lrh_index, + rec->cur_id, rec->cur_endrec, llh->lgh_id.lgl_oid); + + spin_lock(&mdd->mdd_cl.mc_user_lock); + mdd->mdd_cl.mc_lastuser = rec->cur_id; + spin_unlock(&mdd->mdd_cl.mc_user_lock); + + RETURN(LLOG_PROC_BREAK); +} + + +static int mdd_changelog_llog_init(struct mdd_device *mdd) +{ + struct obd_device *obd = mdd2obd_dev(mdd); + struct llog_ctxt *ctxt; + int rc; + + /* Find last changelog entry number */ + ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT); + if (ctxt == NULL) { + CERROR("no changelog context\n"); + return -EINVAL; + } + if (!ctxt->loc_handle) { + llog_ctxt_put(ctxt); + return -EINVAL; + } + + rc = llog_cat_reverse_process(ctxt->loc_handle, changelog_init_cb, mdd); + llog_ctxt_put(ctxt); + + if (rc < 0) { + CERROR("changelog init failed: %d\n", rc); + return rc; + } + CDEBUG(D_IOCTL, "changelog starting index="LPU64"\n", + mdd->mdd_cl.mc_index); + + /* Find last changelog user id */ + ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT); + if (ctxt == NULL) { + CERROR("no changelog user context\n"); + return -EINVAL; + } + if (!ctxt->loc_handle) { + llog_ctxt_put(ctxt); + return -EINVAL; + } + + rc = llog_cat_reverse_process(ctxt->loc_handle, changelog_user_init_cb, + mdd); + llog_ctxt_put(ctxt); + + if (rc < 0) { + CERROR("changelog user init failed: %d\n", rc); + return rc; + } + + /* If we have registered users, assume we want changelogs on */ + if (mdd->mdd_cl.mc_lastuser > 0) + rc = mdd_changelog_on(mdd, 1); + + return rc; +} + +static int mdd_changelog_init(const struct lu_env *env, struct mdd_device *mdd) +{ + int rc; + + mdd->mdd_cl.mc_index = 0; + spin_lock_init(&mdd->mdd_cl.mc_lock); + cfs_waitq_init(&mdd->mdd_cl.mc_waitq); + mdd->mdd_cl.mc_starttime = cfs_time_current_64(); + mdd->mdd_cl.mc_flags = 0; /* off by default */ + mdd->mdd_cl.mc_mask = CHANGELOG_DEFMASK; + spin_lock_init(&mdd->mdd_cl.mc_user_lock); + mdd->mdd_cl.mc_lastuser = 0; + + rc = mdd_changelog_llog_init(mdd); + if (rc) { + CERROR("Changelog setup during init failed %d\n", rc); + mdd->mdd_cl.mc_flags |= CLM_ERR; + } + + return rc; +} + +static void mdd_changelog_fini(const struct lu_env *env, struct mdd_device *mdd) +{ + mdd->mdd_cl.mc_flags = 0; +} + +/* Start / stop recording */ +int mdd_changelog_on(struct mdd_device *mdd, int on) +{ + int rc = 0; + + if ((on == 1) && ((mdd->mdd_cl.mc_flags & CLM_ON) == 0)) { + LCONSOLE_INFO("%s: changelog on\n", mdd2obd_dev(mdd)->obd_name); + if (mdd->mdd_cl.mc_flags & CLM_ERR) { + CERROR("Changelogs cannot be enabled due to error " + "condition (see %s log).\n", + mdd2obd_dev(mdd)->obd_name); + rc = -ESRCH; + } else { + spin_lock(&mdd->mdd_cl.mc_lock); + mdd->mdd_cl.mc_flags |= CLM_ON; + spin_unlock(&mdd->mdd_cl.mc_lock); + rc = mdd_changelog_write_header(mdd, CLM_START); + } + } else if ((on == 0) && ((mdd->mdd_cl.mc_flags & CLM_ON) == CLM_ON)) { + LCONSOLE_INFO("%s: changelog off\n",mdd2obd_dev(mdd)->obd_name); + rc = mdd_changelog_write_header(mdd, CLM_FINI); + spin_lock(&mdd->mdd_cl.mc_lock); + mdd->mdd_cl.mc_flags &= ~CLM_ON; + spin_unlock(&mdd->mdd_cl.mc_lock); + } + return rc; +} + +/** Add a changelog entry \a rec to the changelog llog + * \param mdd + * \param rec + * \param handle - currently ignored since llogs start their own transaction; + * this will hopefully be fixed in llog rewrite + * \retval 0 ok + */ +int mdd_changelog_llog_write(struct mdd_device *mdd, + struct llog_changelog_rec *rec, + struct thandle *handle) +{ + struct obd_device *obd = mdd2obd_dev(mdd); + struct llog_ctxt *ctxt; + int rc; + + if ((mdd->mdd_cl.mc_mask & (1 << rec->cr_type)) == 0) + return 0; + + rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) + rec->cr_namelen); + /* llog_lvfs_write_rec sets the llog tail len */ + rec->cr_hdr.lrh_type = CHANGELOG_REC; + rec->cr_time = cfs_time_current_64(); + spin_lock(&mdd->mdd_cl.mc_lock); + /* NB: I suppose it's possible llog_add adds out of order wrt cr_index, + but as long as the MDD transactions are ordered correctly for e.g. + rename conflicts, I don't think this should matter. */ + rec->cr_index = ++mdd->mdd_cl.mc_index; + spin_unlock(&mdd->mdd_cl.mc_lock); + ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT); + if (ctxt == NULL) + return -ENXIO; + + /* nested journal transaction */ + rc = llog_add(ctxt, &rec->cr_hdr, NULL, NULL, 0); + llog_ctxt_put(ctxt); + + cfs_waitq_signal(&mdd->mdd_cl.mc_waitq); + + return rc; +} + +/** Remove entries with indicies up to and including \a endrec from the + * changelog + * \param mdd + * \param endrec + * \retval 0 ok + */ +int mdd_changelog_llog_cancel(struct mdd_device *mdd, long long endrec) +{ + struct obd_device *obd = mdd2obd_dev(mdd); + struct llog_ctxt *ctxt; + long long unsigned cur; + int rc; + + ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT); + if (ctxt == NULL) + return -ENXIO; + + spin_lock(&mdd->mdd_cl.mc_lock); + cur = (long long)mdd->mdd_cl.mc_index; + spin_unlock(&mdd->mdd_cl.mc_lock); + if (endrec > cur) + endrec = cur; + + /* purge to "0" is shorthand for everything */ + if (endrec == 0) + endrec = cur; + + /* If purging all records, write a header entry so we don't have an + empty catalog and we're sure to have a valid starting index next + time. In case of crash, we just restart with old log so we're + allright. */ + if (endrec == cur) { + rc = mdd_changelog_write_header(mdd, CLM_PURGE); + if (rc) + goto out; + } + + /* Some records were purged, so reset repeat-access time (so we + record new mtime update records, so users can see a file has been + changed since the last purge) */ + mdd->mdd_cl.mc_starttime = cfs_time_current_64(); + + rc = llog_cancel(ctxt, NULL, 1, (struct llog_cookie *)&endrec, 0); +out: + llog_ctxt_put(ctxt); + return rc; +} + +/** Add a CL_MARK record to the changelog + * \param mdd + * \param markerflags - CLM_* + * \retval 0 ok + */ +int mdd_changelog_write_header(struct mdd_device *mdd, int markerflags) +{ + struct obd_device *obd = mdd2obd_dev(mdd); + struct llog_changelog_rec *rec; + int reclen; + int len = strlen(obd->obd_name); + int rc; + ENTRY; + + reclen = llog_data_len(sizeof(*rec) + len); + OBD_ALLOC(rec, reclen); + if (rec == NULL) + RETURN(-ENOMEM); + + rec->cr_flags = CLF_VERSION; + rec->cr_type = CL_MARK; + rec->cr_namelen = len; + memcpy(rec->cr_name, obd->obd_name, rec->cr_namelen); + /* Status and action flags */ + rec->cr_markerflags = mdd->mdd_cl.mc_flags | markerflags; + + rc = mdd_changelog_llog_write(mdd, rec, NULL); + + /* assume on or off event; reset repeat-access time */ + mdd->mdd_cl.mc_starttime = rec->cr_time; + + OBD_FREE(rec, reclen); + RETURN(rc); +} + +/** + * Create ".lustre" directory. + */ +static int create_dot_lustre_dir(const struct lu_env *env, struct mdd_device *m) +{ + struct lu_fid *fid = &mdd_env_info(env)->mti_fid; + struct md_object *mdo; + int rc; + + memcpy(fid, &LU_DOT_LUSTRE_FID, sizeof(struct lu_fid)); + mdo = llo_store_create_index(env, &m->mdd_md_dev, m->mdd_child, + mdd_root_dir_name, dot_lustre_name, + fid, &dt_directory_features); + /* .lustre dir may be already present */ + if (IS_ERR(mdo) && PTR_ERR(mdo) != -EEXIST) { + rc = PTR_ERR(mdo); + CERROR("creating obj [%s] fid = "DFID" rc = %d\n", + dot_lustre_name, PFID(fid), rc); + RETURN(rc); + } + + if (!IS_ERR(mdo)) + lu_object_put(env, &mdo->mo_lu); + + return 0; +} + +static int dot_lustre_attr_get(const struct lu_env *env, struct md_object *obj, + struct md_attr *ma) +{ + struct mdd_object *mdd_obj = md2mdd_obj(obj); + + return mdd_attr_get_internal_locked(env, mdd_obj, ma); +} + +static int dot_lustre_attr_set(const struct lu_env *env, struct md_object *obj, + const struct md_attr *ma) +{ + return -EPERM; +} + +static int dot_lustre_xattr_get(const struct lu_env *env, + struct md_object *obj, struct lu_buf *buf, + const char *name) +{ + return 0; +} + +static int dot_lustre_xattr_list(const struct lu_env *env, + struct md_object *obj, struct lu_buf *buf) +{ + return -EPERM; +} + +static int dot_lustre_mdd_open(const struct lu_env *env, struct md_object *obj, + int flags) +{ + struct mdd_object *mdd_obj = md2mdd_obj(obj); + + mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD); + mdd_obj->mod_count++; + mdd_write_unlock(env, mdd_obj); + + return 0; +} + +static int dot_lustre_path(const struct lu_env *env, struct md_object *obj, + char *path, int pathlen, __u64 *recno, int *linkno) +{ + return -ENOSYS; +} + +static int dot_lustre_close(const struct lu_env *env, struct md_object *obj, + struct md_attr *ma) +{ + struct mdd_object *mdd_obj = md2mdd_obj(obj); + + mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD); + mdd_obj->mod_count--; + mdd_write_unlock(env, mdd_obj); + + return 0; +} + +static dt_obj_version_t dot_lustre_version_get(const struct lu_env *env, + struct md_object *obj) +{ + return 0; +} + +static void dot_lustre_version_set(const struct lu_env *env, + struct md_object *obj, + dt_obj_version_t version) +{ + return; +} + + +static struct md_object_operations mdd_dot_lustre_obj_ops = { + .moo_attr_get = dot_lustre_attr_get, + .moo_attr_set = dot_lustre_attr_set, + .moo_xattr_get = dot_lustre_xattr_get, + .moo_xattr_list = dot_lustre_xattr_list, + .moo_open = dot_lustre_mdd_open, + .moo_close = dot_lustre_close, + .moo_readpage = mdd_readpage, + .moo_version_get = dot_lustre_version_get, + .moo_version_set = dot_lustre_version_set, + .moo_path = dot_lustre_path +}; + +static int dot_lustre_lookup(const struct lu_env *env, struct md_object *p, + const struct lu_name *lname, struct lu_fid *f, + struct md_op_spec *spec) +{ + if (strcmp(lname->ln_name, mdd_obf_dir_name) == 0) + *f = LU_OBF_FID; + else + return -ENOENT; + + return 0; +} + +static int dot_lustre_create(const struct lu_env *env, struct md_object *pobj, + const struct lu_name *lname, + struct md_object *child, struct md_op_spec *spec, + struct md_attr* ma) +{ + return -EPERM; +} + +static int dot_lustre_rename(const struct lu_env *env, + struct md_object *src_pobj, + struct md_object *tgt_pobj, + const struct lu_fid *lf, + const struct lu_name *lsname, + struct md_object *tobj, + const struct lu_name *ltname, struct md_attr *ma) +{ + return -EPERM; +} + +static int dot_lustre_link(const struct lu_env *env, struct md_object *tgt_obj, + struct md_object *src_obj, + const struct lu_name *lname, struct md_attr *ma) +{ + return -EPERM; +} + +static int dot_lustre_unlink(const struct lu_env *env, struct md_object *pobj, + struct md_object *cobj, const struct lu_name *lname, + struct md_attr *ma) +{ + return -EPERM; +} + +static struct md_dir_operations mdd_dot_lustre_dir_ops = { + .mdo_lookup = dot_lustre_lookup, + .mdo_create = dot_lustre_create, + .mdo_rename = dot_lustre_rename, + .mdo_link = dot_lustre_link, + .mdo_unlink = dot_lustre_unlink, +}; + +static int obf_attr_get(const struct lu_env *env, struct md_object *obj, + struct md_attr *ma) +{ + int rc = 0; + + if (ma->ma_need & MA_INODE) { + struct mdd_device *mdd = mdo2mdd(obj); + + /* "fid" is a virtual object and hence does not have any "real" + * attributes. So we reuse attributes of .lustre for "fid" dir */ + ma->ma_need |= MA_INODE; + rc = dot_lustre_attr_get(env, &mdd->mdd_dot_lustre->mod_obj, ma); + if (rc) + return rc; + ma->ma_valid |= MA_INODE; + } + + /* "fid" directory does not have any striping information. */ + if (ma->ma_need & MA_LOV) { + struct mdd_object *mdd_obj = md2mdd_obj(obj); + + if (ma->ma_valid & MA_LOV) + return 0; + + if (!(S_ISREG(mdd_object_type(mdd_obj)) || + S_ISDIR(mdd_object_type(mdd_obj)))) + return 0; + + if (ma->ma_need & MA_LOV_DEF) { + rc = mdd_get_default_md(mdd_obj, ma->ma_lmm, + &ma->ma_lmm_size); + if (rc > 0) { + ma->ma_valid |= MA_LOV; + rc = 0; + } + } + } + + return rc; +} + +static int obf_attr_set(const struct lu_env *env, struct md_object *obj, + const struct md_attr *ma) +{ + return -EPERM; +} + +static int obf_xattr_get(const struct lu_env *env, + struct md_object *obj, struct lu_buf *buf, + const char *name) +{ + return 0; +} + +static int obf_mdd_open(const struct lu_env *env, struct md_object *obj, + int flags) +{ + struct mdd_object *mdd_obj = md2mdd_obj(obj); + + mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD); + mdd_obj->mod_count++; + mdd_write_unlock(env, mdd_obj); + + return 0; +} + +static int obf_mdd_close(const struct lu_env *env, struct md_object *obj, + struct md_attr *ma) +{ + struct mdd_object *mdd_obj = md2mdd_obj(obj); + + mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD); + mdd_obj->mod_count--; + mdd_write_unlock(env, mdd_obj); + + return 0; +} + +/** Nothing to list in "fid" directory */ +static int obf_mdd_readpage(const struct lu_env *env, struct md_object *obj, + const struct lu_rdpg *rdpg) +{ + return -EPERM; +} + +static int obf_path(const struct lu_env *env, struct md_object *obj, + char *path, int pathlen, __u64 *recno, int *linkno) +{ + return -ENOSYS; +} + +static struct md_object_operations mdd_obf_obj_ops = { + .moo_attr_get = obf_attr_get, + .moo_attr_set = obf_attr_set, + .moo_xattr_get = obf_xattr_get, + .moo_open = obf_mdd_open, + .moo_close = obf_mdd_close, + .moo_readpage = obf_mdd_readpage, + .moo_path = obf_path +}; + +/** + * Lookup method for "fid" object. Only filenames with correct SEQ:OID format + * are valid. We also check if object with passed fid exists or not. + */ +static int obf_lookup(const struct lu_env *env, struct md_object *p, + const struct lu_name *lname, struct lu_fid *f, + struct md_op_spec *spec) +{ + char *name = (char *)lname->ln_name; + struct mdd_device *mdd = mdo2mdd(p); + struct mdd_object *child; + int rc = 0; + + while (*name == '[') + name++; + + sscanf(name, SFID, RFID(f)); + if (!fid_is_sane(f)) { + CWARN("bad FID format [%s], should be "DFID"\n", lname->ln_name, + (__u64)1, 2, 0); + GOTO(out, rc = -EINVAL); + } + + /* Check if object with this fid exists */ + child = mdd_object_find(env, mdd, f); + if (child == NULL) + GOTO(out, rc = 0); + if (IS_ERR(child)) + GOTO(out, rc = PTR_ERR(child)); + + if (mdd_object_exists(child) == 0) + rc = -ENOENT; + + mdd_object_put(env, child); + +out: + return rc; +} + +static int obf_create(const struct lu_env *env, struct md_object *pobj, + const struct lu_name *lname, struct md_object *child, + struct md_op_spec *spec, struct md_attr* ma) +{ + return -EPERM; +} + +static int obf_rename(const struct lu_env *env, + struct md_object *src_pobj, struct md_object *tgt_pobj, + const struct lu_fid *lf, const struct lu_name *lsname, + struct md_object *tobj, const struct lu_name *ltname, + struct md_attr *ma) +{ + return -EPERM; +} + +static int obf_link(const struct lu_env *env, struct md_object *tgt_obj, + struct md_object *src_obj, const struct lu_name *lname, + struct md_attr *ma) +{ + return -EPERM; +} + +static int obf_unlink(const struct lu_env *env, struct md_object *pobj, + struct md_object *cobj, const struct lu_name *lname, + struct md_attr *ma) +{ + return -EPERM; +} + +static struct md_dir_operations mdd_obf_dir_ops = { + .mdo_lookup = obf_lookup, + .mdo_create = obf_create, + .mdo_rename = obf_rename, + .mdo_link = obf_link, + .mdo_unlink = obf_unlink +}; + +/** + * Create special in-memory "fid" object for open-by-fid. + */ +static int mdd_obf_setup(const struct lu_env *env, struct mdd_device *m) +{ + struct mdd_object *mdd_obf; + struct lu_object *obf_lu_obj; + int rc = 0; + + m->mdd_dot_lustre_objs.mdd_obf = mdd_object_find(env, m, + &LU_OBF_FID); + if (m->mdd_dot_lustre_objs.mdd_obf == NULL || + IS_ERR(m->mdd_dot_lustre_objs.mdd_obf)) + GOTO(out, rc = -ENOENT); + + mdd_obf = m->mdd_dot_lustre_objs.mdd_obf; + mdd_obf->mod_obj.mo_dir_ops = &mdd_obf_dir_ops; + mdd_obf->mod_obj.mo_ops = &mdd_obf_obj_ops; + /* Don't allow objects to be created in "fid" dir */ + mdd_obf->mod_flags |= IMMUTE_OBJ; + + obf_lu_obj = mdd2lu_obj(mdd_obf); + obf_lu_obj->lo_header->loh_attr |= (LOHA_EXISTS | S_IFDIR); + +out: + return rc; +} + +/** Setup ".lustre" directory object */ +static int mdd_dot_lustre_setup(const struct lu_env *env, struct mdd_device *m) +{ + struct dt_object *dt_dot_lustre; + struct lu_fid *fid = &mdd_env_info(env)->mti_fid; + int rc; + + rc = create_dot_lustre_dir(env, m); + if (rc) + return rc; + + dt_dot_lustre = dt_store_open(env, m->mdd_child, mdd_root_dir_name, + dot_lustre_name, fid); + if (IS_ERR(dt_dot_lustre)) { + rc = PTR_ERR(dt_dot_lustre); + GOTO(out, rc); + } + + /* references are released in mdd_device_shutdown() */ + m->mdd_dot_lustre = lu2mdd_obj(lu_object_locate(dt_dot_lustre->do_lu.lo_header, + &mdd_device_type)); + + m->mdd_dot_lustre->mod_obj.mo_dir_ops = &mdd_dot_lustre_dir_ops; + m->mdd_dot_lustre->mod_obj.mo_ops = &mdd_dot_lustre_obj_ops; + + rc = mdd_obf_setup(env, m); + if (rc) + CERROR("Error initializing \"fid\" object - %d.\n", rc); + +out: + RETURN(rc); +} + static int mdd_process_config(const struct lu_env *env, struct lu_device *d, struct lustre_cfg *cfg) { @@ -146,7 +822,7 @@ static int mdd_process_config(const struct lu_env *env, lprocfs_mdd_init_vars(&lvars); rc = class_process_proc_param(PARAM_MDD, lvars.obd_vars, cfg,m); - if (rc == -ENOSYS) + if (rc > 0 || rc == -ENOSYS) /* we don't understand; pass it on */ rc = next->ld_ops->ldo_process_config(env, next, cfg); break; @@ -162,10 +838,11 @@ static int mdd_process_config(const struct lu_env *env, CERROR("lov init error %d \n", rc); GOTO(out, rc); } - rc = mdd_mount(env, m); - if (rc) - GOTO(out, rc); rc = mdd_txn_init_credits(env, m); + if (rc) + break; + + mdd_changelog_init(env, m); break; case LCFG_CLEANUP: mdd_device_shutdown(env, m, cfg); @@ -176,6 +853,7 @@ static int mdd_process_config(const struct lu_env *env, out: RETURN(rc); } + #if 0 static int mdd_lov_set_nextid(const struct lu_env *env, struct mdd_device *mdd) @@ -243,10 +921,48 @@ static int mdd_recovery_complete(const struct lu_env *env, RETURN(rc); } -struct lu_device_operations mdd_lu_ops = { - .ldo_object_alloc = mdd_object_alloc, +static int mdd_prepare(const struct lu_env *env, + struct lu_device *pdev, + struct lu_device *cdev) +{ + struct mdd_device *mdd = lu2mdd_dev(cdev); + struct lu_device *next = &mdd->mdd_child->dd_lu_dev; + struct dt_object *root; + int rc; + + ENTRY; + rc = next->ld_ops->ldo_prepare(env, cdev, next); + if (rc) + GOTO(out, rc); + + dt_txn_callback_add(mdd->mdd_child, &mdd->mdd_txn_cb); + root = dt_store_open(env, mdd->mdd_child, "", mdd_root_dir_name, + &mdd->mdd_root_fid); + if (!IS_ERR(root)) { + LASSERT(root != NULL); + lu_object_put(env, &root->do_lu); + rc = orph_index_init(env, mdd); + } else { + rc = PTR_ERR(root); + } + if (rc) + GOTO(out, rc); + + rc = mdd_dot_lustre_setup(env, mdd); + if (rc) { + CERROR("Error(%d) initializing .lustre objects\n", rc); + GOTO(out, rc); + } + +out: + RETURN(rc); +} + +const struct lu_device_operations mdd_lu_ops = { + .ldo_object_alloc = mdd_object_alloc, .ldo_process_config = mdd_process_config, - .ldo_recovery_complete = mdd_recovery_complete + .ldo_recovery_complete = mdd_recovery_complete, + .ldo_prepare = mdd_prepare, }; /* @@ -268,7 +984,7 @@ static int mdd_root_get(const struct lu_env *env, static int mdd_statfs(const struct lu_env *env, struct md_device *m, struct kstatfs *sfs) { - struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); + struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); int rc; ENTRY; @@ -284,7 +1000,7 @@ static int mdd_statfs(const struct lu_env *env, struct md_device *m, static int mdd_maxsize_get(const struct lu_env *env, struct md_device *m, int *md_size, int *cookie_size) { - struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); + struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); ENTRY; *md_size = mdd_lov_mdsize(env, mdd); @@ -297,7 +1013,7 @@ static int mdd_init_capa_ctxt(const struct lu_env *env, struct md_device *m, int mode, unsigned long timeout, __u32 alg, struct lustre_capa_key *keys) { - struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); + struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); struct mds_obd *mds = &mdd2obd_dev(mdd)->u.mds; int rc; ENTRY; @@ -312,16 +1028,26 @@ static int mdd_update_capa_key(const struct lu_env *env, struct md_device *m, struct lustre_capa_key *key) { - struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); + struct mds_capa_info info = { .uuid = NULL, .capa = key }; + struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); struct obd_export *lov_exp = mdd2obd_dev(mdd)->u.mds.mds_osc_exp; int rc; ENTRY; rc = obd_set_info_async(lov_exp, sizeof(KEY_CAPA_KEY), KEY_CAPA_KEY, - sizeof(*key), key, NULL); + sizeof(info), &info, NULL); RETURN(rc); } +static int mdd_llog_ctxt_get(const struct lu_env *env, struct md_device *m, + int idx, void **h) +{ + struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); + + *h = llog_group_get_ctxt(&mdd2obd_dev(mdd)->obd_olg, idx); + return (*h == NULL ? -ENOENT : 0); +} + static struct lu_device *mdd_device_alloc(const struct lu_env *env, struct lu_device_type *t, struct lustre_cfg *lcfg) @@ -397,21 +1123,265 @@ struct md_capainfo *md_capainfo(const struct lu_env *env) } EXPORT_SYMBOL(md_capainfo); +static int mdd_changelog_user_register(struct mdd_device *mdd, int *id) +{ + struct llog_ctxt *ctxt; + struct llog_changelog_user_rec *rec; + int rc; + ENTRY; + + ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT); + if (ctxt == NULL) + RETURN(-ENXIO); + + OBD_ALLOC_PTR(rec); + if (rec == NULL) { + llog_ctxt_put(ctxt); + RETURN(-ENOMEM); + } + + /* Assume we want it on since somebody registered */ + rc = mdd_changelog_on(mdd, 1); + if (rc) + GOTO(out, rc); + + rec->cur_hdr.lrh_len = sizeof(*rec); + rec->cur_hdr.lrh_type = CHANGELOG_USER_REC; + spin_lock(&mdd->mdd_cl.mc_user_lock); + if (mdd->mdd_cl.mc_lastuser == (unsigned int)(-1)) { + spin_unlock(&mdd->mdd_cl.mc_user_lock); + CERROR("Maximum number of changelog users exceeded!\n"); + GOTO(out, rc = -EOVERFLOW); + } + *id = rec->cur_id = ++mdd->mdd_cl.mc_lastuser; + rec->cur_endrec = mdd->mdd_cl.mc_index; + spin_unlock(&mdd->mdd_cl.mc_user_lock); + + rc = llog_add(ctxt, &rec->cur_hdr, NULL, NULL, 0); + + CDEBUG(D_IOCTL, "Registered changelog user %d\n", *id); +out: + OBD_FREE_PTR(rec); + llog_ctxt_put(ctxt); + 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; + int mcud_found:1; +}; +#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 + */ +static int mdd_changelog_user_purge_cb(struct llog_handle *llh, + struct llog_rec_hdr *hdr, void *data) +{ + struct llog_changelog_user_rec *rec; + struct mdd_changelog_user_data *mcud = + (struct mdd_changelog_user_data *)data; + int rc; + ENTRY; + + LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN); + + rec = (struct llog_changelog_user_rec *)hdr; + + mcud->mcud_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); + + /* 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; + } + + if (rec->cur_id != mcud->mcud_id) + RETURN(0); + + /* Update this user's record */ + mcud->mcud_found = 1; + + /* Special case: unregister this user */ + if (mcud->mcud_endrec == MCUD_UNREGISTER) { + struct llog_cookie cookie; + cookie.lgc_lgl = llh->lgh_id; + cookie.lgc_index = hdr->lrh_index; + rc = llog_cat_cancel_records(llh->u.phd.phd_cat_handle, + 1, &cookie); + if (rc == 0) + mcud->mcud_usercount--; + RETURN(rc); + } + + /* Update the endrec */ + CDEBUG(D_IOCTL, "Rewriting changelog user %d endrec to "LPU64"\n", + mcud->mcud_id, rec->cur_endrec); + + /* hdr+1 is loc of data */ + hdr->lrh_len -= sizeof(*hdr) + sizeof(struct llog_rec_tail); + rc = llog_write_rec(llh, hdr, NULL, 0, (void *)(hdr + 1), + hdr->lrh_index); + + RETURN(rc); +} + +static int mdd_changelog_user_purge(struct mdd_device *mdd, int id, + long long endrec) +{ + struct mdd_changelog_user_data data; + struct llog_ctxt *ctxt; + int rc; + ENTRY; + + CDEBUG(D_IOCTL, "Purge request: id=%d, endrec="LPD64"\n", id, endrec); + + data.mcud_id = id; + data.mcud_minid = 0; + data.mcud_minrec = 0; + data.mcud_usercount = 0; + data.mcud_endrec = endrec; + spin_lock(&mdd->mdd_cl.mc_lock); + endrec = 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; + LASSERT(ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT); + + rc = llog_cat_process(ctxt->loc_handle, mdd_changelog_user_purge_cb, + (void *)&data, 0, 0); + if ((rc >= 0) && (data.mcud_minrec > 0)) { + CDEBUG(D_IOCTL, "Purging changelog entries up to "LPD64 + ", referenced by "CHANGELOG_USER_PREFIX"%d\n", + data.mcud_minrec, data.mcud_minid); + rc = mdd_changelog_llog_cancel(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 " + LPD64" by changelog user %d\n", data.mcud_id, + data.mcud_minrec, data.mcud_minid); + rc = -ENOENT; + } + + if (!rc && data.mcud_usercount == 0) + /* No more users; turn changelogs off */ + rc = mdd_changelog_on(mdd, 0); + + RETURN (rc); +} + +/** mdd_iocontrol + * May be called remotely from mdt_iocontrol_handle or locally from + * mdt_iocontrol. Data may be freeform - remote handling doesn't enforce + * an obd_ioctl_data format (but local ioctl handler does). + * \param cmd - ioc + * \param len - data len + * \param karg - ioctl data, in kernel space + */ +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; + + mdd = lu2mdd_dev(&m->md_lu_dev); + + /* Doesn't use obd_ioctl_data */ + if (cmd == OBD_IOC_CHANGELOG_CLEAR) { + struct changelog_setinfo *cs = karg; + rc = mdd_changelog_user_purge(mdd, cs->cs_id, cs->cs_recno); + RETURN(rc); + } + + /* 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(mdd, &data->ioc_u32_1); + break; + case OBD_IOC_CHANGELOG_DEREG: + rc = mdd_changelog_user_purge(mdd, data->ioc_u32_1, + MCUD_UNREGISTER); + break; + default: + rc = -EOPNOTSUPP; + } + + RETURN (rc); +} + /* type constructor/destructor: mdd_type_init, mdd_type_fini */ LU_TYPE_INIT_FINI(mdd, &mdd_thread_key, &mdd_ucred_key, &mdd_capainfo_key); -struct md_device_operations mdd_ops = { +const struct md_device_operations mdd_ops = { .mdo_statfs = mdd_statfs, .mdo_root_get = mdd_root_get, .mdo_maxsize_get = mdd_maxsize_get, .mdo_init_capa_ctxt = mdd_init_capa_ctxt, .mdo_update_capa_key= mdd_update_capa_key, + .mdo_llog_ctxt_get = mdd_llog_ctxt_get, + .mdo_iocontrol = mdd_iocontrol, +#ifdef HAVE_QUOTA_SUPPORT + .mdo_quota = { + .mqo_notify = mdd_quota_notify, + .mqo_setup = mdd_quota_setup, + .mqo_cleanup = mdd_quota_cleanup, + .mqo_recovery = mdd_quota_recovery, + .mqo_check = mdd_quota_check, + .mqo_on = mdd_quota_on, + .mqo_off = mdd_quota_off, + .mqo_setinfo = mdd_quota_setinfo, + .mqo_getinfo = mdd_quota_getinfo, + .mqo_setquota = mdd_quota_setquota, + .mqo_getquota = mdd_quota_getquota, + .mqo_getoinfo = mdd_quota_getoinfo, + .mqo_getoquota = mdd_quota_getoquota, + .mqo_invalidate = mdd_quota_invalidate, + .mqo_finvalidate = mdd_quota_finvalidate + } +#endif }; static struct lu_device_type_operations mdd_device_type_ops = { .ldto_init = mdd_type_init, .ldto_fini = mdd_type_fini, + .ldto_start = mdd_type_start, + .ldto_stop = mdd_type_stop, + .ldto_device_alloc = mdd_device_alloc, .ldto_device_free = mdd_device_free, @@ -437,22 +1407,53 @@ static void mdd_key_fini(const struct lu_context *ctx, OBD_FREE(info->mti_max_lmm, info->mti_max_lmm_size); if (info->mti_max_cookie != NULL) OBD_FREE(info->mti_max_cookie, info->mti_max_cookie_size); + mdd_buf_put(&info->mti_big_buf); + OBD_FREE_PTR(info); } /* context key: mdd_thread_key */ LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD); +static struct lu_local_obj_desc llod_capa_key = { + .llod_name = CAPA_KEYS, + .llod_oid = MDD_CAPA_KEYS_OID, + .llod_is_index = 0, +}; + +static struct lu_local_obj_desc llod_mdd_orphan = { + .llod_name = orph_index_name, + .llod_oid = MDD_ORPHAN_OID, + .llod_is_index = 1, + .llod_feat = &dt_directory_features, +}; + +static struct lu_local_obj_desc llod_mdd_root = { + .llod_name = mdd_root_dir_name, + .llod_oid = MDD_ROOT_INDEX_OID, + .llod_is_index = 1, + .llod_feat = &dt_directory_features, +}; + static int __init mdd_mod_init(void) { struct lprocfs_static_vars lvars; lprocfs_mdd_init_vars(&lvars); + + llo_local_obj_register(&llod_capa_key); + llo_local_obj_register(&llod_mdd_orphan); + llo_local_obj_register(&llod_mdd_root); + return class_register_type(&mdd_obd_device_ops, NULL, lvars.module_vars, LUSTRE_MDD_NAME, &mdd_device_type); } static void __exit mdd_mod_exit(void) { + llo_local_obj_unregister(&llod_capa_key); + llo_local_obj_unregister(&llod_mdd_orphan); + llo_local_obj_unregister(&llod_mdd_root); + class_unregister_type(LUSTRE_MDD_NAME); }