void zfs_unregister_callbacks(zfs_sb_t *zsb) { objset_t *os = zsb->z_os; struct dsl_dataset *ds; /* * Unregister properties. */ if (!dmu_objset_is_snapshot(os)) { ds = dmu_objset_ds(os); VERIFY(dsl_prop_unregister(ds, "atime", atime_changed_cb, zsb) == 0); VERIFY(dsl_prop_unregister(ds, "xattr", xattr_changed_cb, zsb) == 0); VERIFY(dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, zsb) == 0); VERIFY(dsl_prop_unregister(ds, "readonly", readonly_changed_cb, zsb) == 0); VERIFY(dsl_prop_unregister(ds, "devices", devices_changed_cb, zsb) == 0); VERIFY(dsl_prop_unregister(ds, "setuid", setuid_changed_cb, zsb) == 0); VERIFY(dsl_prop_unregister(ds, "exec", exec_changed_cb, zsb) == 0); VERIFY(dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, zsb) == 0); VERIFY(dsl_prop_unregister(ds, "aclinherit", acl_inherit_changed_cb, zsb) == 0); VERIFY(dsl_prop_unregister(ds, "vscan", vscan_changed_cb, zsb) == 0); VERIFY(dsl_prop_unregister(ds, "nbmand", nbmand_changed_cb, zsb) == 0); } }
static void zvol_last_close(zvol_state_t *zv) { zil_close(zv->zv_zilog); zv->zv_zilog = NULL; dmu_buf_rele(zv->zv_dbuf, zvol_tag); zv->zv_dbuf = NULL; /* * Evict cached data */ if (dsl_dataset_is_dirty(dmu_objset_ds(zv->zv_objset)) && !(zv->zv_flags & ZVOL_RDONLY)) txg_wait_synced(dmu_objset_pool(zv->zv_objset), 0); (void) dmu_objset_evict_dbufs(zv->zv_objset); dmu_objset_disown(zv->zv_objset, zvol_tag); zv->zv_objset = NULL; }
/* * Remove minor node for the specified volume. */ int zvol_remove_minor(zfs_cmd_t *zc) { zvol_state_t *zv; char namebuf[30]; mutex_enter(&zvol_state_lock); if ((zv = zvol_minor_lookup(zc->zc_name)) == NULL) { mutex_exit(&zvol_state_lock); return (ENXIO); } if (zv->zv_total_opens != 0) { mutex_exit(&zvol_state_lock); return (EBUSY); } (void) sprintf(namebuf, "%uc,raw", zv->zv_minor); ddi_remove_minor_node(zfs_dip, namebuf); (void) sprintf(namebuf, "%uc", zv->zv_minor); ddi_remove_minor_node(zfs_dip, namebuf); VERIFY(dsl_prop_unregister(dmu_objset_ds(zv->zv_objset), "readonly", zvol_readonly_changed_cb, zv) == 0); zil_close(zv->zv_zilog); zv->zv_zilog = NULL; dmu_objset_close(zv->zv_objset); zv->zv_objset = NULL; ddi_soft_state_free(zvol_state, zv->zv_minor); zvol_minors--; mutex_exit(&zvol_state_lock); return (0); }
/* * Close an intent log. */ void zil_close(zilog_t *zilog) { /* * If the log isn't already committed, mark the objset dirty * (so zil_sync() will be called) and wait for that txg to sync. */ if (!zil_is_committed(zilog)) { uint64_t txg; dmu_tx_t *tx = dmu_tx_create(zilog->zl_os); (void) dmu_tx_assign(tx, TXG_WAIT); dsl_dataset_dirty(dmu_objset_ds(zilog->zl_os), tx); txg = dmu_tx_get_txg(tx); dmu_tx_commit(tx); txg_wait_synced(zilog->zl_dmu_pool, txg); } taskq_destroy(zilog->zl_clean_taskq); zilog->zl_clean_taskq = NULL; zilog->zl_get_data = NULL; zil_itx_clean(zilog); ASSERT(list_head(&zilog->zl_itx_list) == NULL); }
int zfs_register_callbacks(zfs_sb_t *zsb) { struct dsl_dataset *ds = NULL; objset_t *os = zsb->z_os; zfs_mntopts_t *zmo = zsb->z_mntopts; int error = 0; ASSERT(zsb); ASSERT(zmo); /* * The act of registering our callbacks will destroy any mount * options we may have. In order to enable temporary overrides * of mount options, we stash away the current values and * restore them after we register the callbacks. */ if (zfs_is_readonly(zsb) || !spa_writeable(dmu_objset_spa(os))) { zmo->z_do_readonly = B_TRUE; zmo->z_readonly = B_TRUE; } /* * Register property callbacks. * * It would probably be fine to just check for i/o error from * the first prop_register(), but I guess I like to go * overboard... */ ds = dmu_objset_ds(os); dsl_pool_config_enter(dmu_objset_pool(os), FTAG); error = dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_ATIME), atime_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_RELATIME), relatime_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_XATTR), xattr_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_RECORDSIZE), blksz_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_READONLY), readonly_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_DEVICES), devices_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_SETUID), setuid_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_EXEC), exec_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_SNAPDIR), snapdir_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_ACLTYPE), acltype_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_ACLINHERIT), acl_inherit_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_VSCAN), vscan_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_NBMAND), nbmand_changed_cb, zsb); dsl_pool_config_exit(dmu_objset_pool(os), FTAG); if (error) goto unregister; /* * Invoke our callbacks to restore temporary mount options. */ if (zmo->z_do_readonly) readonly_changed_cb(zsb, zmo->z_readonly); if (zmo->z_do_setuid) setuid_changed_cb(zsb, zmo->z_setuid); if (zmo->z_do_exec) exec_changed_cb(zsb, zmo->z_exec); if (zmo->z_do_devices) devices_changed_cb(zsb, zmo->z_devices); if (zmo->z_do_xattr) xattr_changed_cb(zsb, zmo->z_xattr); if (zmo->z_do_atime) atime_changed_cb(zsb, zmo->z_atime); if (zmo->z_do_relatime) relatime_changed_cb(zsb, zmo->z_relatime); if (zmo->z_do_nbmand) nbmand_changed_cb(zsb, zmo->z_nbmand); return (0); unregister: /* * We may attempt to unregister some callbacks that are not * registered, but this is OK; it will simply return ENOMSG, * which we will ignore. */ (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ATIME), atime_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_RELATIME), relatime_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_XATTR), xattr_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_RECORDSIZE), blksz_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_READONLY), readonly_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_DEVICES), devices_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_SETUID), setuid_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_EXEC), exec_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_SNAPDIR), snapdir_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ACLTYPE), acltype_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ACLINHERIT), acl_inherit_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_VSCAN), vscan_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_NBMAND), nbmand_changed_cb, zsb); return (error); }
/* * Teardown the zfs_sb_t. * * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock' * and 'z_teardown_inactive_lock' held. */ int zfs_sb_teardown(zfs_sb_t *zsb, boolean_t unmounting) { znode_t *zp; /* * If someone has not already unmounted this file system, * drain the iput_taskq to ensure all active references to the * zfs_sb_t have been handled only then can it be safely destroyed. */ if (zsb->z_os) { /* * If we're unmounting we have to wait for the list to * drain completely. * * If we're not unmounting there's no guarantee the list * will drain completely, but iputs run from the taskq * may add the parents of dir-based xattrs to the taskq * so we want to wait for these. * * We can safely read z_nr_znodes without locking because the * VFS has already blocked operations which add to the * z_all_znodes list and thus increment z_nr_znodes. */ int round = 0; while (zsb->z_nr_znodes > 0) { taskq_wait_outstanding(dsl_pool_iput_taskq( dmu_objset_pool(zsb->z_os)), 0); if (++round > 1 && !unmounting) break; } } rrm_enter(&zsb->z_teardown_lock, RW_WRITER, FTAG); if (!unmounting) { /* * We purge the parent filesystem's super block as the * parent filesystem and all of its snapshots have their * inode's super block set to the parent's filesystem's * super block. Note, 'z_parent' is self referential * for non-snapshots. */ shrink_dcache_sb(zsb->z_parent->z_sb); } /* * Close the zil. NB: Can't close the zil while zfs_inactive * threads are blocked as zil_close can call zfs_inactive. */ if (zsb->z_log) { zil_close(zsb->z_log); zsb->z_log = NULL; } rw_enter(&zsb->z_teardown_inactive_lock, RW_WRITER); /* * If we are not unmounting (ie: online recv) and someone already * unmounted this file system while we were doing the switcheroo, * or a reopen of z_os failed then just bail out now. */ if (!unmounting && (zsb->z_unmounted || zsb->z_os == NULL)) { rw_exit(&zsb->z_teardown_inactive_lock); rrm_exit(&zsb->z_teardown_lock, FTAG); return (SET_ERROR(EIO)); } /* * At this point there are no VFS ops active, and any new VFS ops * will fail with EIO since we have z_teardown_lock for writer (only * relevant for forced unmount). * * Release all holds on dbufs. */ if (!unmounting) { mutex_enter(&zsb->z_znodes_lock); for (zp = list_head(&zsb->z_all_znodes); zp != NULL; zp = list_next(&zsb->z_all_znodes, zp)) { if (zp->z_sa_hdl) zfs_znode_dmu_fini(zp); } mutex_exit(&zsb->z_znodes_lock); } /* * If we are unmounting, set the unmounted flag and let new VFS ops * unblock. zfs_inactive will have the unmounted behavior, and all * other VFS ops will fail with EIO. */ if (unmounting) { zsb->z_unmounted = B_TRUE; rrm_exit(&zsb->z_teardown_lock, FTAG); rw_exit(&zsb->z_teardown_inactive_lock); } /* * z_os will be NULL if there was an error in attempting to reopen * zsb, so just return as the properties had already been * * unregistered and cached data had been evicted before. */ if (zsb->z_os == NULL) return (0); /* * Unregister properties. */ zfs_unregister_callbacks(zsb); /* * Evict cached data */ if (dsl_dataset_is_dirty(dmu_objset_ds(zsb->z_os)) && !zfs_is_readonly(zsb)) txg_wait_synced(dmu_objset_pool(zsb->z_os), 0); dmu_objset_evict_dbufs(zsb->z_os); return (0); }
uint64_t sa_obj; ASSERT3U(spa_version(dmu_objset_spa(zsb->z_os)), >=, SPA_VERSION_SA); sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE, DMU_OT_NONE, 0, tx); error = zap_add(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, &sa_obj, tx); ASSERT0(error); VERIFY(0 == sa_set_sa_object(os, sa_obj)); sa_register_update_callback(os, zfs_sa_upgrade); } spa_history_log_internal_ds(dmu_objset_ds(os), "upgrade", tx, "from %llu to %llu", zsb->z_version, newvers); dmu_tx_commit(tx); zsb->z_version = newvers; zfs_set_fuid_feature(zsb); return (0); } EXPORT_SYMBOL(zfs_set_version); /* * Read a property stored within the master node. */
int zfs_register_callbacks(zfs_sb_t *zsb) { struct dsl_dataset *ds = NULL; objset_t *os = zsb->z_os; boolean_t do_readonly = B_FALSE; int error = 0; if (zfs_is_readonly(zsb) || !spa_writeable(dmu_objset_spa(os))) do_readonly = B_TRUE; /* * Register property callbacks. * * It would probably be fine to just check for i/o error from * the first prop_register(), but I guess I like to go * overboard... */ ds = dmu_objset_ds(os); dsl_pool_config_enter(dmu_objset_pool(os), FTAG); error = dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_ATIME), atime_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_XATTR), xattr_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_RECORDSIZE), blksz_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_READONLY), readonly_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_DEVICES), devices_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_SETUID), setuid_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_EXEC), exec_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_SNAPDIR), snapdir_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_ACLINHERIT), acl_inherit_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_VSCAN), vscan_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_NBMAND), nbmand_changed_cb, zsb); dsl_pool_config_exit(dmu_objset_pool(os), FTAG); if (error) goto unregister; if (do_readonly) readonly_changed_cb(zsb, B_TRUE); return (0); unregister: /* * We may attempt to unregister some callbacks that are not * registered, but this is OK; it will simply return ENOMSG, * which we will ignore. */ (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ATIME), atime_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_XATTR), xattr_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_RECORDSIZE), blksz_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_READONLY), readonly_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_DEVICES), devices_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_SETUID), setuid_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_EXEC), exec_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_SNAPDIR), snapdir_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ACLINHERIT), acl_inherit_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_VSCAN), vscan_changed_cb, zsb); (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_NBMAND), nbmand_changed_cb, zsb); return (error); }
/* * Teardown the zfs_sb_t. * * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock' * and 'z_teardown_inactive_lock' held. */ int zfs_sb_teardown(zfs_sb_t *zsb, boolean_t unmounting) { znode_t *zp; rrw_enter(&zsb->z_teardown_lock, RW_WRITER, FTAG); if (!unmounting) { /* * We purge the parent filesystem's super block as the * parent filesystem and all of its snapshots have their * inode's super block set to the parent's filesystem's * super block. Note, 'z_parent' is self referential * for non-snapshots. */ shrink_dcache_sb(zsb->z_parent->z_sb); } /* * If someone has not already unmounted this file system, * drain the iput_taskq to ensure all active references to the * zfs_sb_t have been handled only then can it be safely destroyed. */ if (zsb->z_os) taskq_wait(dsl_pool_iput_taskq(dmu_objset_pool(zsb->z_os))); /* * Close the zil. NB: Can't close the zil while zfs_inactive * threads are blocked as zil_close can call zfs_inactive. */ if (zsb->z_log) { zil_close(zsb->z_log); zsb->z_log = NULL; } rw_enter(&zsb->z_teardown_inactive_lock, RW_WRITER); /* * If we are not unmounting (ie: online recv) and someone already * unmounted this file system while we were doing the switcheroo, * or a reopen of z_os failed then just bail out now. */ if (!unmounting && (zsb->z_unmounted || zsb->z_os == NULL)) { rw_exit(&zsb->z_teardown_inactive_lock); rrw_exit(&zsb->z_teardown_lock, FTAG); return (EIO); } /* * At this point there are no VFS ops active, and any new VFS ops * will fail with EIO since we have z_teardown_lock for writer (only * relevant for forced unmount). * * Release all holds on dbufs. */ mutex_enter(&zsb->z_znodes_lock); for (zp = list_head(&zsb->z_all_znodes); zp != NULL; zp = list_next(&zsb->z_all_znodes, zp)) { if (zp->z_sa_hdl) { ASSERT(atomic_read(&ZTOI(zp)->i_count) > 0); zfs_znode_dmu_fini(zp); } } mutex_exit(&zsb->z_znodes_lock); /* * If we are unmounting, set the unmounted flag and let new VFS ops * unblock. zfs_inactive will have the unmounted behavior, and all * other VFS ops will fail with EIO. */ if (unmounting) { zsb->z_unmounted = B_TRUE; rrw_exit(&zsb->z_teardown_lock, FTAG); rw_exit(&zsb->z_teardown_inactive_lock); } /* * z_os will be NULL if there was an error in attempting to reopen * zsb, so just return as the properties had already been * * unregistered and cached data had been evicted before. */ if (zsb->z_os == NULL) return (0); /* * Unregister properties. */ zfs_unregister_callbacks(zsb); /* * Evict cached data */ if (dsl_dataset_is_dirty(dmu_objset_ds(zsb->z_os)) && !zfs_is_readonly(zsb)) txg_wait_synced(dmu_objset_pool(zsb->z_os), 0); dmu_objset_evict_dbufs(zsb->z_os); return (0); }
static int zfs_register_callbacks(vfs_t *vfsp) { struct dsl_dataset *ds = NULL; objset_t *os = NULL; zfsvfs_t *zfsvfs = NULL; int do_readonly = FALSE, readonly; int do_setuid = FALSE, setuid; int do_exec = FALSE, exec; int do_devices = FALSE, devices; int error = 0; ASSERT(vfsp); zfsvfs = vfsp->vfs_data; ASSERT(zfsvfs); os = zfsvfs->z_os; /* * The act of registering our callbacks will destroy any mount * options we may have. In order to enable temporary overrides * of mount options, we stash away the current values and restore * restore them after we register the callbacks. */ if (vfs_optionisset(vfsp, MNTOPT_RO, NULL)) { readonly = B_TRUE; do_readonly = B_TRUE; } else if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) { readonly = B_FALSE; do_readonly = B_TRUE; } if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) { devices = B_FALSE; setuid = B_FALSE; do_devices = B_TRUE; do_setuid = B_TRUE; } else { if (vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL)) { devices = B_FALSE; do_devices = B_TRUE; } else if (vfs_optionisset(vfsp, MNTOPT_DEVICES, NULL)) { devices = B_TRUE; do_devices = B_TRUE; } if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) { setuid = B_FALSE; do_setuid = B_TRUE; } else if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) { setuid = B_TRUE; do_setuid = B_TRUE; } } if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) { exec = B_FALSE; do_exec = B_TRUE; } else if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) { exec = B_TRUE; do_exec = B_TRUE; } /* * Register property callbacks. * * It would probably be fine to just check for i/o error from * the first prop_register(), but I guess I like to go * overboard... */ ds = dmu_objset_ds(os); error = dsl_prop_register(ds, "atime", atime_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "recordsize", blksz_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "readonly", readonly_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "devices", devices_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "setuid", setuid_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "exec", exec_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "snapdir", snapdir_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "aclmode", acl_mode_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "aclinherit", acl_inherit_changed_cb, zfsvfs); if (error) goto unregister; /* * Invoke our callbacks to restore temporary mount options. */ if (do_readonly) readonly_changed_cb(zfsvfs, readonly); if (do_setuid) setuid_changed_cb(zfsvfs, setuid); if (do_exec) exec_changed_cb(zfsvfs, exec); if (do_devices) devices_changed_cb(zfsvfs, devices); return (0); unregister: /* * We may attempt to unregister some callbacks that are not * registered, but this is OK; it will simply return ENOMSG, * which we will ignore. */ (void) dsl_prop_unregister(ds, "atime", atime_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "readonly", readonly_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "devices", devices_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "setuid", setuid_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "exec", exec_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "aclmode", acl_mode_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "aclinherit", acl_inherit_changed_cb, zfsvfs); return (error); }
/* * Create a minor node for the specified volume. */ int zvol_create_minor(zfs_cmd_t *zc) { char *name = zc->zc_name; dev_t dev = zc->zc_dev; zvol_state_t *zv; objset_t *os; uint64_t volsize; minor_t minor = 0; struct pathname linkpath; int ds_mode = DS_MODE_PRIMARY; vnode_t *vp = NULL; char *devpath; size_t devpathlen = strlen(ZVOL_FULL_DEV_DIR) + 1 + strlen(name) + 1; char chrbuf[30], blkbuf[30]; int error; mutex_enter(&zvol_state_lock); if ((zv = zvol_minor_lookup(name)) != NULL) { mutex_exit(&zvol_state_lock); return (EEXIST); } if (strchr(name, '@') != 0) ds_mode |= DS_MODE_READONLY; error = dmu_objset_open(name, DMU_OST_ZVOL, ds_mode, &os); if (error) { mutex_exit(&zvol_state_lock); return (error); } error = zap_lookup(os, ZVOL_ZAP_OBJ, "size", 8, 1, &volsize); if (error) { dmu_objset_close(os); mutex_exit(&zvol_state_lock); return (error); } /* * If there's an existing /dev/zvol symlink, try to use the * same minor number we used last time. */ devpath = kmem_alloc(devpathlen, KM_SLEEP); (void) sprintf(devpath, "%s/%s", ZVOL_FULL_DEV_DIR, name); error = lookupname(devpath, UIO_SYSSPACE, NO_FOLLOW, NULL, &vp); kmem_free(devpath, devpathlen); if (error == 0 && vp->v_type != VLNK) error = EINVAL; if (error == 0) { pn_alloc(&linkpath); error = pn_getsymlink(vp, &linkpath, kcred); if (error == 0) { char *ms = strstr(linkpath.pn_path, ZVOL_PSEUDO_DEV); if (ms != NULL) { ms += strlen(ZVOL_PSEUDO_DEV); minor = stoi(&ms); } } pn_free(&linkpath); } if (vp != NULL) VN_RELE(vp); /* * If we found a minor but it's already in use, we must pick a new one. */ if (minor != 0 && ddi_get_soft_state(zvol_state, minor) != NULL) minor = 0; if (minor == 0) minor = zvol_minor_alloc(); if (minor == 0) { dmu_objset_close(os); mutex_exit(&zvol_state_lock); return (ENXIO); } if (ddi_soft_state_zalloc(zvol_state, minor) != DDI_SUCCESS) { dmu_objset_close(os); mutex_exit(&zvol_state_lock); return (EAGAIN); } (void) ddi_prop_update_string(minor, zfs_dip, ZVOL_PROP_NAME, name); (void) sprintf(chrbuf, "%uc,raw", minor); if (ddi_create_minor_node(zfs_dip, chrbuf, S_IFCHR, minor, DDI_PSEUDO, 0) == DDI_FAILURE) { ddi_soft_state_free(zvol_state, minor); dmu_objset_close(os); mutex_exit(&zvol_state_lock); return (EAGAIN); } (void) sprintf(blkbuf, "%uc", minor); if (ddi_create_minor_node(zfs_dip, blkbuf, S_IFBLK, minor, DDI_PSEUDO, 0) == DDI_FAILURE) { ddi_remove_minor_node(zfs_dip, chrbuf); ddi_soft_state_free(zvol_state, minor); dmu_objset_close(os); mutex_exit(&zvol_state_lock); return (EAGAIN); } zv = ddi_get_soft_state(zvol_state, minor); (void) strcpy(zv->zv_name, name); zv->zv_min_bs = DEV_BSHIFT; zv->zv_minor = minor; zv->zv_volsize = volsize; zv->zv_objset = os; zv->zv_mode = ds_mode; zv->zv_zilog = zil_open(os, NULL); rw_init(&zv->zv_dslock, NULL, RW_DEFAULT, NULL); zil_replay(os, zv, &zv->zv_txg_assign, zvol_replay_vector, NULL); zvol_size_changed(zv, dev); /* XXX this should handle the possible i/o error */ VERIFY(dsl_prop_register(dmu_objset_ds(zv->zv_objset), "readonly", zvol_readonly_changed_cb, zv) == 0); zvol_minors++; mutex_exit(&zvol_state_lock); return (0); }
static int zfs_register_callbacks(vfs_t *vfsp) { struct dsl_dataset *ds = NULL; objset_t *os = NULL; zfsvfs_t *zfsvfs = NULL; uint64_t nbmand; int readonly, do_readonly = FALSE; int setuid, do_setuid = FALSE; int exec, do_exec = FALSE; int xattr, do_xattr = FALSE; int atime, do_atime = FALSE; int error = 0; ASSERT(vfsp); zfsvfs = vfsp->vfs_data; ASSERT(zfsvfs); os = zfsvfs->z_os; /* * This function can be called for a snapshot when we update snapshot's * mount point, which isn't really supported. */ if (dmu_objset_is_snapshot(os)) return (EOPNOTSUPP); /* * The act of registering our callbacks will destroy any mount * options we may have. In order to enable temporary overrides * of mount options, we stash away the current values and * restore them after we register the callbacks. */ if (vfs_optionisset(vfsp, MNTOPT_RO, NULL)) { readonly = B_TRUE; do_readonly = B_TRUE; } else if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) { readonly = B_FALSE; do_readonly = B_TRUE; } if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) { setuid = B_FALSE; do_setuid = B_TRUE; } else { if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) { setuid = B_FALSE; do_setuid = B_TRUE; } else if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) { setuid = B_TRUE; do_setuid = B_TRUE; } } if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) { exec = B_FALSE; do_exec = B_TRUE; } else if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) { exec = B_TRUE; do_exec = B_TRUE; } if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL)) { xattr = B_FALSE; do_xattr = B_TRUE; } else if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL)) { xattr = B_TRUE; do_xattr = B_TRUE; } if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) { atime = B_FALSE; do_atime = B_TRUE; } else if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL)) { atime = B_TRUE; do_atime = B_TRUE; } /* * nbmand is a special property. It can only be changed at * mount time. * * This is weird, but it is documented to only be changeable * at mount time. */ if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) { nbmand = B_FALSE; } else if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) { nbmand = B_TRUE; } else { char osname[MAXNAMELEN]; dmu_objset_name(os, osname); if (error = dsl_prop_get_integer(osname, "nbmand", &nbmand, NULL)) { return (error); } } /* * Register property callbacks. * * It would probably be fine to just check for i/o error from * the first prop_register(), but I guess I like to go * overboard... */ ds = dmu_objset_ds(os); error = dsl_prop_register(ds, "atime", atime_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "xattr", xattr_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "recordsize", blksz_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "readonly", readonly_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "setuid", setuid_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "exec", exec_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "snapdir", snapdir_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "aclmode", acl_mode_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "aclinherit", acl_inherit_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds, "vscan", vscan_changed_cb, zfsvfs); if (error) goto unregister; /* * Invoke our callbacks to restore temporary mount options. */ if (do_readonly) readonly_changed_cb(zfsvfs, readonly); if (do_setuid) setuid_changed_cb(zfsvfs, setuid); if (do_exec) exec_changed_cb(zfsvfs, exec); if (do_xattr) xattr_changed_cb(zfsvfs, xattr); if (do_atime) atime_changed_cb(zfsvfs, atime); nbmand_changed_cb(zfsvfs, nbmand); return (0); unregister: /* * We may attempt to unregister some callbacks that are not * registered, but this is OK; it will simply return ENOMSG, * which we will ignore. */ (void) dsl_prop_unregister(ds, "atime", atime_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "xattr", xattr_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "readonly", readonly_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "setuid", setuid_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "exec", exec_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "aclmode", acl_mode_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "aclinherit", acl_inherit_changed_cb, zfsvfs); (void) dsl_prop_unregister(ds, "vscan", vscan_changed_cb, zfsvfs); return (error); }
/* * Start a log block write and advance to the next log block. * Calls are serialized. */ static lwb_t * zil_lwb_write_start(zilog_t *zilog, lwb_t *lwb) { lwb_t *nlwb; zil_trailer_t *ztp = (zil_trailer_t *)(lwb->lwb_buf + lwb->lwb_sz) - 1; spa_t *spa = zilog->zl_spa; blkptr_t *bp = &ztp->zit_next_blk; uint64_t txg; uint64_t zil_blksz; int error; ASSERT(lwb->lwb_nused <= ZIL_BLK_DATA_SZ(lwb)); /* * Allocate the next block and save its address in this block * before writing it in order to establish the log chain. * Note that if the allocation of nlwb synced before we wrote * the block that points at it (lwb), we'd leak it if we crashed. * Therefore, we don't do txg_rele_to_sync() until zil_lwb_write_done(). */ txg = txg_hold_open(zilog->zl_dmu_pool, &lwb->lwb_txgh); txg_rele_to_quiesce(&lwb->lwb_txgh); /* * Pick a ZIL blocksize. We request a size that is the * maximum of the previous used size, the current used size and * the amount waiting in the queue. */ zil_blksz = MAX(zilog->zl_prev_used, zilog->zl_cur_used + sizeof (*ztp)); zil_blksz = MAX(zil_blksz, zilog->zl_itx_list_sz + sizeof (*ztp)); zil_blksz = P2ROUNDUP_TYPED(zil_blksz, ZIL_MIN_BLKSZ, uint64_t); if (zil_blksz > ZIL_MAX_BLKSZ) zil_blksz = ZIL_MAX_BLKSZ; BP_ZERO(bp); /* pass the old blkptr in order to spread log blocks across devs */ error = zio_alloc_blk(spa, zil_blksz, bp, &lwb->lwb_blk, txg); if (error) { dmu_tx_t *tx = dmu_tx_create_assigned(zilog->zl_dmu_pool, txg); /* * We dirty the dataset to ensure that zil_sync() will * be called to remove this lwb from our zl_lwb_list. * Failing to do so, may leave an lwb with a NULL lwb_buf * hanging around on the zl_lwb_list. */ dsl_dataset_dirty(dmu_objset_ds(zilog->zl_os), tx); dmu_tx_commit(tx); /* * Since we've just experienced an allocation failure so we * terminate the current lwb and send it on its way. */ ztp->zit_pad = 0; ztp->zit_nused = lwb->lwb_nused; ztp->zit_bt.zbt_cksum = lwb->lwb_blk.blk_cksum; zio_nowait(lwb->lwb_zio); /* * By returning NULL the caller will call tx_wait_synced() */ return (NULL); } ASSERT3U(bp->blk_birth, ==, txg); ztp->zit_pad = 0; ztp->zit_nused = lwb->lwb_nused; ztp->zit_bt.zbt_cksum = lwb->lwb_blk.blk_cksum; bp->blk_cksum = lwb->lwb_blk.blk_cksum; bp->blk_cksum.zc_word[ZIL_ZC_SEQ]++; /* * Allocate a new log write buffer (lwb). */ nlwb = kmem_cache_alloc(zil_lwb_cache, KM_SLEEP); nlwb->lwb_zilog = zilog; nlwb->lwb_blk = *bp; nlwb->lwb_nused = 0; nlwb->lwb_sz = BP_GET_LSIZE(&nlwb->lwb_blk); nlwb->lwb_buf = zio_buf_alloc(nlwb->lwb_sz); nlwb->lwb_max_txg = txg; nlwb->lwb_zio = NULL; /* * Put new lwb at the end of the log chain */ mutex_enter(&zilog->zl_lock); list_insert_tail(&zilog->zl_lwb_list, nlwb); mutex_exit(&zilog->zl_lock); /* Record the block for later vdev flushing */ zil_add_block(zilog, &lwb->lwb_blk); /* * kick off the write for the old log block */ dprintf_bp(&lwb->lwb_blk, "lwb %p txg %llu: ", lwb, txg); ASSERT(lwb->lwb_zio); zio_nowait(lwb->lwb_zio); return (nlwb); }
int zil_claim(char *osname, void *txarg) { dmu_tx_t *tx = txarg; uint64_t first_txg = dmu_tx_get_txg(tx); zilog_t *zilog; zil_header_t *zh; objset_t *os; int error; error = dmu_objset_open(osname, DMU_OST_ANY, DS_MODE_USER, &os); if (error) { cmn_err(CE_WARN, "can't open objset for %s", osname); return (0); } zilog = dmu_objset_zil(os); zh = zil_header_in_syncing_context(zilog); if (zilog->zl_spa->spa_log_state == SPA_LOG_CLEAR) { if (!BP_IS_HOLE(&zh->zh_log)) zio_free_blk(zilog->zl_spa, &zh->zh_log, first_txg); BP_ZERO(&zh->zh_log); dsl_dataset_dirty(dmu_objset_ds(os), tx); } /* * Record here whether the zil has any records to replay. * If the header block pointer is null or the block points * to the stubby then we know there are no valid log records. * We use the header to store this state as the the zilog gets * freed later in dmu_objset_close(). * The flags (and the rest of the header fields) are cleared in * zil_sync() as a result of a zil_destroy(), after replaying the log. * * Note, the intent log can be empty but still need the * stubby to be claimed. */ if (!zil_empty(zilog)) { zh->zh_flags |= ZIL_REPLAY_NEEDED; dsl_dataset_dirty(dmu_objset_ds(os), tx); } /* * Claim all log blocks if we haven't already done so, and remember * the highest claimed sequence number. This ensures that if we can * read only part of the log now (e.g. due to a missing device), * but we can read the entire log later, we will not try to replay * or destroy beyond the last block we successfully claimed. */ ASSERT3U(zh->zh_claim_txg, <=, first_txg); if (zh->zh_claim_txg == 0 && !BP_IS_HOLE(&zh->zh_log)) { zh->zh_claim_txg = first_txg; zh->zh_claim_seq = zil_parse(zilog, zil_claim_log_block, zil_claim_log_record, tx, first_txg); dsl_dataset_dirty(dmu_objset_ds(os), tx); } ASSERT3U(first_txg, ==, (spa_last_synced_txg(zilog->zl_spa) + 1)); dmu_objset_close(os); return (0); }
/* * Create an on-disk intent log. */ static void zil_create(zilog_t *zilog) { const zil_header_t *zh = zilog->zl_header; lwb_t *lwb; uint64_t txg = 0; dmu_tx_t *tx = NULL; blkptr_t blk; int error = 0; /* * Wait for any previous destroy to complete. */ txg_wait_synced(zilog->zl_dmu_pool, zilog->zl_destroy_txg); ASSERT(zh->zh_claim_txg == 0); ASSERT(zh->zh_replay_seq == 0); blk = zh->zh_log; /* * If we don't already have an initial log block or we have one * but it's the wrong endianness then allocate one. */ if (BP_IS_HOLE(&blk) || BP_SHOULD_BYTESWAP(&blk)) { tx = dmu_tx_create(zilog->zl_os); (void) dmu_tx_assign(tx, TXG_WAIT); dsl_dataset_dirty(dmu_objset_ds(zilog->zl_os), tx); txg = dmu_tx_get_txg(tx); if (!BP_IS_HOLE(&blk)) { zio_free_blk(zilog->zl_spa, &blk, txg); BP_ZERO(&blk); } error = zio_alloc_blk(zilog->zl_spa, ZIL_MIN_BLKSZ, &blk, NULL, txg); if (error == 0) zil_init_log_chain(zilog, &blk); } /* * Allocate a log write buffer (lwb) for the first log block. */ if (error == 0) { lwb = kmem_cache_alloc(zil_lwb_cache, KM_SLEEP); lwb->lwb_zilog = zilog; lwb->lwb_blk = blk; lwb->lwb_nused = 0; lwb->lwb_sz = BP_GET_LSIZE(&lwb->lwb_blk); lwb->lwb_buf = zio_buf_alloc(lwb->lwb_sz); lwb->lwb_max_txg = txg; lwb->lwb_zio = NULL; mutex_enter(&zilog->zl_lock); list_insert_tail(&zilog->zl_lwb_list, lwb); mutex_exit(&zilog->zl_lock); } /* * If we just allocated the first log block, commit our transaction * and wait for zil_sync() to stuff the block poiner into zh_log. * (zh is part of the MOS, so we cannot modify it in open context.) */ if (tx != NULL) { dmu_tx_commit(tx); txg_wait_synced(zilog->zl_dmu_pool, txg); } ASSERT(bcmp(&blk, &zh->zh_log, sizeof (blk)) == 0); }
int zfs_register_callbacks(zfs_sb_t *zsb) { struct dsl_dataset *ds = NULL; objset_t *os = zsb->z_os; int error = 0; if (zfs_is_readonly(zsb) || !spa_writeable(dmu_objset_spa(os))) readonly_changed_cb(zsb, B_TRUE); /* * Register property callbacks. * * It would probably be fine to just check for i/o error from * the first prop_register(), but I guess I like to go * overboard... */ ds = dmu_objset_ds(os); error = dsl_prop_register(ds, "atime", atime_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, "xattr", xattr_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, "recordsize", blksz_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, "readonly", readonly_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, "devices", devices_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, "setuid", setuid_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, "exec", exec_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, "snapdir", snapdir_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, "aclinherit", acl_inherit_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, "vscan", vscan_changed_cb, zsb); error = error ? error : dsl_prop_register(ds, "nbmand", nbmand_changed_cb, zsb); if (error) goto unregister; return (0); unregister: /* * We may attempt to unregister some callbacks that are not * registered, but this is OK; it will simply return ENOMSG, * which we will ignore. */ (void) dsl_prop_unregister(ds, "atime", atime_changed_cb, zsb); (void) dsl_prop_unregister(ds, "xattr", xattr_changed_cb, zsb); (void) dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, zsb); (void) dsl_prop_unregister(ds, "readonly", readonly_changed_cb, zsb); (void) dsl_prop_unregister(ds, "devices", devices_changed_cb, zsb); (void) dsl_prop_unregister(ds, "setuid", setuid_changed_cb, zsb); (void) dsl_prop_unregister(ds, "exec", exec_changed_cb, zsb); (void) dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, zsb); (void) dsl_prop_unregister(ds, "aclinherit", acl_inherit_changed_cb, zsb); (void) dsl_prop_unregister(ds, "vscan", vscan_changed_cb, zsb); (void) dsl_prop_unregister(ds, "nbmand", nbmand_changed_cb, zsb); return (error); }