From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A295DC46475 for ; Tue, 6 Nov 2018 18:36:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7AEF320862 for ; Tue, 6 Nov 2018 18:36:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7AEF320862 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388675AbeKGECz (ORCPT ); Tue, 6 Nov 2018 23:02:55 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36460 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388667AbeKGECy (ORCPT ); Tue, 6 Nov 2018 23:02:54 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B264688307; Tue, 6 Nov 2018 18:36:20 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-123-119.rdu2.redhat.com [10.10.123.119]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6F60E60C61; Tue, 6 Nov 2018 18:36:20 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 2659120C43; Tue, 6 Nov 2018 13:36:20 -0500 (EST) From: Scott Mayhew To: steved@redhat.com Cc: jlayton@kernel.org, linux-nfs@vger.kernel.org Subject: [nfs-utils PATCH RFC 2/7] nfsdcld: move nfsdcld to its own directory Date: Tue, 6 Nov 2018 13:36:15 -0500 Message-Id: <20181106183620.18609-3-smayhew@redhat.com> In-Reply-To: <20181106183620.18609-1-smayhew@redhat.com> References: <20181106183620.18609-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Tue, 06 Nov 2018 18:36:20 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org The schema for the db used by nfsdcld is going to diverge quite a bit from that used by nfsdcltrack. It will be easier if the programs are kept in separate directories. Signed-off-by: Scott Mayhew --- .gitignore | 2 +- configure.ac | 23 + utils/Makefile.am | 4 + utils/nfsdcld/Makefile.am | 19 + utils/{nfsdcltrack => nfsdcld}/nfsdcld.c | 0 utils/{nfsdcltrack => nfsdcld}/nfsdcld.man | 0 utils/nfsdcld/sqlite.c | 601 +++++++++++++++++++++ utils/nfsdcld/sqlite.h | 32 ++ utils/nfsdcltrack/Makefile.am | 7 +- 9 files changed, 682 insertions(+), 6 deletions(-) create mode 100644 utils/nfsdcld/Makefile.am rename utils/{nfsdcltrack => nfsdcld}/nfsdcld.c (100%) rename utils/{nfsdcltrack => nfsdcld}/nfsdcld.man (100%) create mode 100644 utils/nfsdcld/sqlite.c create mode 100644 utils/nfsdcld/sqlite.h diff --git a/.gitignore b/.gitignore index d4f4f34..e97b31f 100644 --- a/.gitignore +++ b/.gitignore @@ -54,7 +54,7 @@ utils/rquotad/rquotad utils/rquotad/rquota.h utils/rquotad/rquota_xdr.c utils/showmount/showmount -utils/nfsdcltrack/nfsdcld +utils/nfsdcld/nfsdcld utils/nfsdcltrack/nfsdcltrack utils/statd/statd tools/locktest/testlk diff --git a/configure.ac b/configure.ac index 4b698dd..d576caf 100644 --- a/configure.ac +++ b/configure.ac @@ -232,6 +232,12 @@ else AM_CONDITIONAL(MOUNT_CONFIG, [test "$enable_mount" = "yes"]) fi +AC_ARG_ENABLE(nfsdcld, + [AC_HELP_STRING([--disable-nfsdcld], + [disable NFSv4 clientid tracking daemon @<:@default=no@:>@])], + enable_nfsdcld=$enableval, + enable_nfsdcld="yes") + AC_ARG_ENABLE(nfsdcltrack, [AC_HELP_STRING([--disable-nfsdcltrack], [disable NFSv4 clientid tracking programs @<:@default=no@:>@])], @@ -318,6 +324,20 @@ if test "$enable_nfsv4" = yes; then dnl Check for sqlite3 AC_SQLITE3_VERS + if test "$enable_nfsdcld" = "yes"; then + AC_CHECK_HEADERS([libgen.h sys/inotify.h], , + AC_MSG_ERROR([Cannot find header needed for nfsdcld])) + + case $libsqlite3_cv_is_recent in + yes) ;; + unknown) + dnl do not fail when cross-compiling + AC_MSG_WARN([assuming sqlite is at least v3.3]) ;; + *) + AC_MSG_ERROR([nfsdcld requires sqlite-devel]) ;; + esac + fi + if test "$enable_nfsdcltrack" = "yes"; then AC_CHECK_HEADERS([libgen.h sys/inotify.h], , AC_MSG_ERROR([Cannot find header needed for nfsdcltrack])) @@ -333,6 +353,7 @@ if test "$enable_nfsv4" = yes; then fi else + enable_nfsdcld="no" enable_nfsdcltrack="no" fi @@ -343,6 +364,7 @@ if test "$enable_nfsv41" = yes; then fi dnl enable nfsidmap when its support by libnfsidmap +AM_CONDITIONAL(CONFIG_NFSDCLD, [test "$enable_nfsdcld" = "yes" ]) AM_CONDITIONAL(CONFIG_NFSDCLTRACK, [test "$enable_nfsdcltrack" = "yes" ]) @@ -619,6 +641,7 @@ AC_CONFIG_FILES([ tools/nfsconf/Makefile utils/Makefile utils/blkmapd/Makefile + utils/nfsdcld/Makefile utils/nfsdcltrack/Makefile utils/exportfs/Makefile utils/gssd/Makefile diff --git a/utils/Makefile.am b/utils/Makefile.am index d361aea..674c9ad 100644 --- a/utils/Makefile.am +++ b/utils/Makefile.am @@ -19,6 +19,10 @@ if CONFIG_MOUNT OPTDIRS += mount endif +if CONFIG_NFSDCLD +OPTDIRS += nfsdcld +endif + if CONFIG_NFSDCLTRACK OPTDIRS += nfsdcltrack endif diff --git a/utils/nfsdcld/Makefile.am b/utils/nfsdcld/Makefile.am new file mode 100644 index 0000000..8239be8 --- /dev/null +++ b/utils/nfsdcld/Makefile.am @@ -0,0 +1,19 @@ +## Process this file with automake to produce Makefile.in + +# These binaries go in /sbin (not /usr/sbin), and that cannot be +# overridden at config time. The kernel "knows" the /sbin name. +sbindir = /sbin + +man8_MANS = nfsdcld.man +EXTRA_DIST = $(man8_MANS) + +AM_CFLAGS += -D_LARGEFILE64_SOURCE +sbin_PROGRAMS = nfsdcld + +nfsdcld_SOURCES = nfsdcld.c sqlite.c +nfsdcld_LDADD = ../../support/nfs/libnfs.la $(LIBEVENT) $(LIBSQLITE) $(LIBCAP) + +noinst_HEADERS = sqlite.h + +MAINTAINERCLEANFILES = Makefile.in + diff --git a/utils/nfsdcltrack/nfsdcld.c b/utils/nfsdcld/nfsdcld.c similarity index 100% rename from utils/nfsdcltrack/nfsdcld.c rename to utils/nfsdcld/nfsdcld.c diff --git a/utils/nfsdcltrack/nfsdcld.man b/utils/nfsdcld/nfsdcld.man similarity index 100% rename from utils/nfsdcltrack/nfsdcld.man rename to utils/nfsdcld/nfsdcld.man diff --git a/utils/nfsdcld/sqlite.c b/utils/nfsdcld/sqlite.c new file mode 100644 index 0000000..c59f777 --- /dev/null +++ b/utils/nfsdcld/sqlite.c @@ -0,0 +1,601 @@ +/* + * Copyright (C) 2011 Red Hat, Jeff Layton + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +/* + * Explanation: + * + * This file contains the code to manage the sqlite backend database for the + * nfsdcltrack usermodehelper upcall program. + * + * The main database is called main.sqlite and contains the following tables: + * + * parameters: simple key/value pairs for storing database info + * + * clients: an "id" column containing a BLOB with the long-form clientid as + * sent by the client, a "time" column containing a timestamp (in + * epoch seconds) of when the record was last updated, and a + * "has_session" column containing a boolean value indicating + * whether the client has sessions (v4.1+) or not (v4.0). + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif /* HAVE_CONFIG_H */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "xlog.h" +#include "sqlite.h" + +#define CLTRACK_SQLITE_LATEST_SCHEMA_VERSION 2 + +/* in milliseconds */ +#define CLTRACK_SQLITE_BUSY_TIMEOUT 10000 + +/* private data structures */ + +/* global variables */ + +/* reusable pathname and sql command buffer */ +static char buf[PATH_MAX]; + +/* global database handle */ +static sqlite3 *dbh; + +/* forward declarations */ + +/* make a directory, ignoring EEXIST errors unless it's not a directory */ +static int +mkdir_if_not_exist(const char *dirname) +{ + int ret; + struct stat statbuf; + + ret = mkdir(dirname, S_IRWXU); + if (ret && errno != EEXIST) + return -errno; + + ret = stat(dirname, &statbuf); + if (ret) + return -errno; + + if (!S_ISDIR(statbuf.st_mode)) + ret = -ENOTDIR; + + return ret; +} + +static int +sqlite_query_schema_version(void) +{ + int ret; + sqlite3_stmt *stmt = NULL; + + /* prepare select query */ + ret = sqlite3_prepare_v2(dbh, + "SELECT value FROM parameters WHERE key == \"version\";", + -1, &stmt, NULL); + if (ret != SQLITE_OK) { + xlog(D_GENERAL, "Unable to prepare select statement: %s", + sqlite3_errmsg(dbh)); + ret = 0; + goto out; + } + + /* query schema version */ + ret = sqlite3_step(stmt); + if (ret != SQLITE_ROW) { + xlog(D_GENERAL, "Select statement execution failed: %s", + sqlite3_errmsg(dbh)); + ret = 0; + goto out; + } + + ret = sqlite3_column_int(stmt, 0); +out: + sqlite3_finalize(stmt); + return ret; +} + +static int +sqlite_maindb_update_v1_to_v2(void) +{ + int ret, ret2; + char *err; + + /* begin transaction */ + ret = sqlite3_exec(dbh, "BEGIN EXCLUSIVE TRANSACTION;", NULL, NULL, + &err); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "Unable to begin transaction: %s", err); + goto rollback; + } + + /* + * Check schema version again. This time, under an exclusive + * transaction to guard against racing DB setup attempts + */ + ret = sqlite_query_schema_version(); + switch (ret) { + case 1: + /* Still at v1 -- do conversion */ + break; + case CLTRACK_SQLITE_LATEST_SCHEMA_VERSION: + /* Someone else raced in and set it up */ + ret = 0; + goto rollback; + default: + /* Something went wrong -- fail! */ + ret = -EINVAL; + goto rollback; + } + + /* create v2 clients table */ + ret = sqlite3_exec(dbh, "ALTER TABLE clients ADD COLUMN " + "has_session INTEGER;", + NULL, NULL, &err); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "Unable to update clients table: %s", err); + goto rollback; + } + + ret = snprintf(buf, sizeof(buf), "UPDATE parameters SET value = %d " + "WHERE key = \"version\";", + CLTRACK_SQLITE_LATEST_SCHEMA_VERSION); + if (ret < 0) { + xlog(L_ERROR, "sprintf failed!"); + goto rollback; + } else if ((size_t)ret >= sizeof(buf)) { + xlog(L_ERROR, "sprintf output too long! (%d chars)", ret); + ret = -EINVAL; + goto rollback; + } + + ret = sqlite3_exec(dbh, (const char *)buf, NULL, NULL, &err); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "Unable to update schema version: %s", err); + goto rollback; + } + + ret = sqlite3_exec(dbh, "COMMIT TRANSACTION;", NULL, NULL, &err); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "Unable to commit transaction: %s", err); + goto rollback; + } +out: + sqlite3_free(err); + return ret; +rollback: + ret2 = sqlite3_exec(dbh, "ROLLBACK TRANSACTION;", NULL, NULL, &err); + if (ret2 != SQLITE_OK) + xlog(L_ERROR, "Unable to rollback transaction: %s", err); + goto out; +} + +/* + * Start an exclusive transaction and recheck the DB schema version. If it's + * still zero (indicating a new database) then set it up. If that all works, + * then insert schema version into the parameters table and commit the + * transaction. On any error, rollback the transaction. + */ +static int +sqlite_maindb_init_v2(void) +{ + int ret, ret2; + char *err = NULL; + + /* Start a transaction */ + ret = sqlite3_exec(dbh, "BEGIN EXCLUSIVE TRANSACTION;", NULL, NULL, + &err); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "Unable to begin transaction: %s", err); + return ret; + } + + /* + * Check schema version again. This time, under an exclusive + * transaction to guard against racing DB setup attempts + */ + ret = sqlite_query_schema_version(); + switch (ret) { + case 0: + /* Query failed again -- set up DB */ + break; + case CLTRACK_SQLITE_LATEST_SCHEMA_VERSION: + /* Someone else raced in and set it up */ + ret = 0; + goto rollback; + default: + /* Something went wrong -- fail! */ + ret = -EINVAL; + goto rollback; + } + + ret = sqlite3_exec(dbh, "CREATE TABLE parameters " + "(key TEXT PRIMARY KEY, value TEXT);", + NULL, NULL, &err); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "Unable to create parameter table: %s", err); + goto rollback; + } + + /* create the "clients" table */ + ret = sqlite3_exec(dbh, "CREATE TABLE clients (id BLOB PRIMARY KEY, " + "time INTEGER, has_session INTEGER);", + NULL, NULL, &err); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "Unable to create clients table: %s", err); + goto rollback; + } + + + /* insert version into parameters table */ + ret = snprintf(buf, sizeof(buf), "INSERT OR FAIL INTO parameters " + "values (\"version\", \"%d\");", + CLTRACK_SQLITE_LATEST_SCHEMA_VERSION); + if (ret < 0) { + xlog(L_ERROR, "sprintf failed!"); + goto rollback; + } else if ((size_t)ret >= sizeof(buf)) { + xlog(L_ERROR, "sprintf output too long! (%d chars)", ret); + ret = -EINVAL; + goto rollback; + } + + ret = sqlite3_exec(dbh, (const char *)buf, NULL, NULL, &err); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "Unable to insert into parameter table: %s", err); + goto rollback; + } + + ret = sqlite3_exec(dbh, "COMMIT TRANSACTION;", NULL, NULL, &err); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "Unable to commit transaction: %s", err); + goto rollback; + } +out: + sqlite3_free(err); + return ret; + +rollback: + /* Attempt to rollback the transaction */ + ret2 = sqlite3_exec(dbh, "ROLLBACK TRANSACTION;", NULL, NULL, &err); + if (ret2 != SQLITE_OK) + xlog(L_ERROR, "Unable to rollback transaction: %s", err); + goto out; +} + +/* Open the database and set up the database handle for it */ +int +sqlite_prepare_dbh(const char *topdir) +{ + int ret; + + /* Do nothing if the database handle is already set up */ + if (dbh) + return 0; + + ret = snprintf(buf, PATH_MAX - 1, "%s/main.sqlite", topdir); + if (ret < 0) + return ret; + + buf[PATH_MAX - 1] = '\0'; + + /* open a new DB handle */ + ret = sqlite3_open(buf, &dbh); + if (ret != SQLITE_OK) { + /* try to create the dir */ + ret = mkdir_if_not_exist(topdir); + if (ret) + goto out_close; + + /* retry open */ + ret = sqlite3_open(buf, &dbh); + if (ret != SQLITE_OK) + goto out_close; + } + + /* set busy timeout */ + ret = sqlite3_busy_timeout(dbh, CLTRACK_SQLITE_BUSY_TIMEOUT); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "Unable to set sqlite busy timeout: %s", + sqlite3_errmsg(dbh)); + goto out_close; + } + + ret = sqlite_query_schema_version(); + switch (ret) { + case CLTRACK_SQLITE_LATEST_SCHEMA_VERSION: + /* DB is already set up. Do nothing */ + ret = 0; + break; + case 1: + /* Old DB -- update to new schema */ + ret = sqlite_maindb_update_v1_to_v2(); + if (ret) + goto out_close; + break; + case 0: + /* Query failed -- try to set up new DB */ + ret = sqlite_maindb_init_v2(); + if (ret) + goto out_close; + break; + default: + /* Unknown DB version -- downgrade? Fail */ + xlog(L_ERROR, "Unsupported database schema version! " + "Expected %d, got %d.", + CLTRACK_SQLITE_LATEST_SCHEMA_VERSION, ret); + ret = -EINVAL; + goto out_close; + } + + return ret; +out_close: + sqlite3_close(dbh); + dbh = NULL; + return ret; +} + +/* + * Create a client record + * + * Returns a non-zero sqlite error code, or SQLITE_OK (aka 0) + */ +int +sqlite_insert_client(const unsigned char *clname, const size_t namelen, + const bool has_session, const bool zerotime) +{ + int ret; + sqlite3_stmt *stmt = NULL; + + if (zerotime) + ret = sqlite3_prepare_v2(dbh, "INSERT OR REPLACE INTO clients " + "VALUES (?, 0, ?);", -1, &stmt, NULL); + else + ret = sqlite3_prepare_v2(dbh, "INSERT OR REPLACE INTO clients " + "VALUES (?, strftime('%s', 'now'), ?);", -1, + &stmt, NULL); + + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: insert statement prepare failed: %s", + __func__, sqlite3_errmsg(dbh)); + return ret; + } + + ret = sqlite3_bind_blob(stmt, 1, (const void *)clname, namelen, + SQLITE_STATIC); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: bind blob failed: %s", __func__, + sqlite3_errmsg(dbh)); + goto out_err; + } + + ret = sqlite3_bind_int(stmt, 2, (int)has_session); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: bind int failed: %s", __func__, + sqlite3_errmsg(dbh)); + goto out_err; + } + + ret = sqlite3_step(stmt); + if (ret == SQLITE_DONE) + ret = SQLITE_OK; + else + xlog(L_ERROR, "%s: unexpected return code from insert: %s", + __func__, sqlite3_errmsg(dbh)); + +out_err: + xlog(D_GENERAL, "%s: returning %d", __func__, ret); + sqlite3_finalize(stmt); + return ret; +} + +/* Remove a client record */ +int +sqlite_remove_client(const unsigned char *clname, const size_t namelen) +{ + int ret; + sqlite3_stmt *stmt = NULL; + + ret = sqlite3_prepare_v2(dbh, "DELETE FROM clients WHERE id==?", -1, + &stmt, NULL); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: statement prepare failed: %s", + __func__, sqlite3_errmsg(dbh)); + goto out_err; + } + + ret = sqlite3_bind_blob(stmt, 1, (const void *)clname, namelen, + SQLITE_STATIC); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: bind blob failed: %s", __func__, + sqlite3_errmsg(dbh)); + goto out_err; + } + + ret = sqlite3_step(stmt); + if (ret == SQLITE_DONE) + ret = SQLITE_OK; + else + xlog(L_ERROR, "%s: unexpected return code from delete: %d", + __func__, ret); + +out_err: + xlog(D_GENERAL, "%s: returning %d", __func__, ret); + sqlite3_finalize(stmt); + return ret; +} + +/* + * Is the given clname in the clients table? If so, then update its timestamp + * and return success. If the record isn't present, or the update fails, then + * return an error. + */ +int +sqlite_check_client(const unsigned char *clname, const size_t namelen, + const bool has_session) +{ + int ret; + sqlite3_stmt *stmt = NULL; + + ret = sqlite3_prepare_v2(dbh, "SELECT count(*) FROM clients WHERE " + "id==?", -1, &stmt, NULL); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: unable to prepare update statement: %s", + __func__, sqlite3_errmsg(dbh)); + goto out_err; + } + + ret = sqlite3_bind_blob(stmt, 1, (const void *)clname, namelen, + SQLITE_STATIC); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: bind blob failed: %s", + __func__, sqlite3_errmsg(dbh)); + goto out_err; + } + + ret = sqlite3_step(stmt); + if (ret != SQLITE_ROW) { + xlog(L_ERROR, "%s: unexpected return code from select: %d", + __func__, ret); + goto out_err; + } + + ret = sqlite3_column_int(stmt, 0); + xlog(D_GENERAL, "%s: select returned %d rows", __func__, ret); + if (ret != 1) { + ret = -EACCES; + goto out_err; + } + + /* Only update timestamp for v4.0 clients */ + if (has_session) { + ret = SQLITE_OK; + goto out_err; + } + + sqlite3_finalize(stmt); + stmt = NULL; + ret = sqlite3_prepare_v2(dbh, "UPDATE OR FAIL clients SET " + "time=strftime('%s', 'now') WHERE id==?", + -1, &stmt, NULL); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: unable to prepare update statement: %s", + __func__, sqlite3_errmsg(dbh)); + goto out_err; + } + + ret = sqlite3_bind_blob(stmt, 1, (const void *)clname, namelen, + SQLITE_STATIC); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: bind blob failed: %s", + __func__, sqlite3_errmsg(dbh)); + goto out_err; + } + + ret = sqlite3_step(stmt); + if (ret == SQLITE_DONE) + ret = SQLITE_OK; + else + xlog(L_ERROR, "%s: unexpected return code from update: %s", + __func__, sqlite3_errmsg(dbh)); + +out_err: + xlog(D_GENERAL, "%s: returning %d", __func__, ret); + sqlite3_finalize(stmt); + return ret; +} + +/* + * remove any client records that were not reclaimed since grace_start. + */ +int +sqlite_remove_unreclaimed(time_t grace_start) +{ + int ret; + char *err = NULL; + + ret = snprintf(buf, sizeof(buf), "DELETE FROM clients WHERE time < %ld", + grace_start); + if (ret < 0) { + return ret; + } else if ((size_t)ret >= sizeof(buf)) { + ret = -EINVAL; + return ret; + } + + ret = sqlite3_exec(dbh, buf, NULL, NULL, &err); + if (ret != SQLITE_OK) + xlog(L_ERROR, "%s: delete failed: %s", __func__, err); + + xlog(D_GENERAL, "%s: returning %d", __func__, ret); + sqlite3_free(err); + return ret; +} + +/* + * Are there any clients that are possibly still reclaiming? Return a positive + * integer (usually number of clients) if so. If not, then return 0. On any + * error, return non-zero. + */ +int +sqlite_query_reclaiming(const time_t grace_start) +{ + int ret; + sqlite3_stmt *stmt = NULL; + + ret = sqlite3_prepare_v2(dbh, "SELECT count(*) FROM clients WHERE " + "time < ? OR has_session != 1", -1, &stmt, NULL); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: unable to prepare select statement: %s", + __func__, sqlite3_errmsg(dbh)); + return ret; + } + + ret = sqlite3_bind_int64(stmt, 1, (sqlite3_int64)grace_start); + if (ret != SQLITE_OK) { + xlog(L_ERROR, "%s: bind int64 failed: %s", + __func__, sqlite3_errmsg(dbh)); + return ret; + } + + ret = sqlite3_step(stmt); + if (ret != SQLITE_ROW) { + xlog(L_ERROR, "%s: unexpected return code from select: %s", + __func__, sqlite3_errmsg(dbh)); + return ret; + } + + ret = sqlite3_column_int(stmt, 0); + sqlite3_finalize(stmt); + xlog(D_GENERAL, "%s: there are %d clients that have not completed " + "reclaim", __func__, ret); + return ret; +} diff --git a/utils/nfsdcld/sqlite.h b/utils/nfsdcld/sqlite.h new file mode 100644 index 0000000..06e7c04 --- /dev/null +++ b/utils/nfsdcld/sqlite.h @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2011 Red Hat, Jeff Layton + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#ifndef _SQLITE_H_ +#define _SQLITE_H_ + +int sqlite_prepare_dbh(const char *topdir); +int sqlite_insert_client(const unsigned char *clname, const size_t namelen, + const bool has_session, const bool zerotime); +int sqlite_remove_client(const unsigned char *clname, const size_t namelen); +int sqlite_check_client(const unsigned char *clname, const size_t namelen, + const bool has_session); +int sqlite_remove_unreclaimed(const time_t grace_start); +int sqlite_query_reclaiming(const time_t grace_start); + +#endif /* _SQLITE_H */ diff --git a/utils/nfsdcltrack/Makefile.am b/utils/nfsdcltrack/Makefile.am index 0f599c0..2f7fe3d 100644 --- a/utils/nfsdcltrack/Makefile.am +++ b/utils/nfsdcltrack/Makefile.am @@ -4,14 +4,11 @@ # overridden at config time. The kernel "knows" the /sbin name. sbindir = /sbin -man8_MANS = nfsdcld.man nfsdcltrack.man +man8_MANS = nfsdcltrack.man EXTRA_DIST = $(man8_MANS) AM_CFLAGS += -D_LARGEFILE64_SOURCE -sbin_PROGRAMS = nfsdcld nfsdcltrack - -nfsdcld_SOURCES = nfsdcld.c sqlite.c -nfsdcld_LDADD = ../../support/nfs/libnfs.la $(LIBEVENT) $(LIBSQLITE) $(LIBCAP) +sbin_PROGRAMS = nfsdcltrack noinst_HEADERS = sqlite.h -- 2.17.1