Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-qg0-f53.google.com ([209.85.192.53]:45495 "EHLO mail-qg0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752972AbaIOOBX (ORCPT ); Mon, 15 Sep 2014 10:01:23 -0400 Received: by mail-qg0-f53.google.com with SMTP id q108so3909350qgd.12 for ; Mon, 15 Sep 2014 07:01:22 -0700 (PDT) From: Jeff Layton To: steved@redhat.com Cc: bfields@fieldses.org, linux-nfs@vger.kernel.org Subject: [PATCH v4 6/7] nfsdcltrack: grab the NFSDCLTRACK_CLIENT_HAS_SESSION env var if it's present Date: Mon, 15 Sep 2014 10:01:04 -0400 Message-Id: <1410789665-19745-7-git-send-email-jlayton@primarydata.com> In-Reply-To: <1410789665-19745-1-git-send-email-jlayton@primarydata.com> References: <1410789665-19745-1-git-send-email-jlayton@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: ...and set the has_session field in the DB based on whether it's true or not. Since we no longer set the timestamp for v4.1+ clients on a check operation, we must be careful to set the timestamp to zero for v4.1+ clients found via the legacy tracker. Signed-off-by: Jeff Layton --- utils/nfsdcltrack/nfsdcltrack.c | 31 ++++++++++++++++++++++++++----- utils/nfsdcltrack/sqlite.c | 30 +++++++++++++++++++++++++----- utils/nfsdcltrack/sqlite.h | 6 ++++-- 3 files changed, 55 insertions(+), 12 deletions(-) diff --git a/utils/nfsdcltrack/nfsdcltrack.c b/utils/nfsdcltrack/nfsdcltrack.c index f2813610be73..80e7e456306e 100644 --- a/utils/nfsdcltrack/nfsdcltrack.c +++ b/utils/nfsdcltrack/nfsdcltrack.c @@ -37,6 +37,7 @@ #include #include #include +#include #ifdef HAVE_SYS_CAPABILITY_H #include #include @@ -254,6 +255,22 @@ cltrack_init(const char __attribute__((unused)) *unused) return ret; } +/* + * Fetch the contents of the NFSDCLTRACK_CLIENT_HAS_SESSION env var. If + * it's set and the first character is 'Y' then return true. Otherwise + * return false. + */ +static bool +cltrack_client_has_session(void) +{ + char *has_session = getenv("NFSDCLTRACK_CLIENT_HAS_SESSION"); + + if (has_session && *has_session == 'Y') + return true; + + return false; +} + static int cltrack_create(const char *id) { @@ -270,7 +287,7 @@ cltrack_create(const char *id) if (len < 0) return (int)len; - ret = sqlite_insert_client(blob, len); + ret = sqlite_insert_client(blob, len, cltrack_client_has_session(), false); return ret ? -EREMOTEIO : ret; } @@ -297,7 +314,8 @@ cltrack_remove(const char *id) } static int -cltrack_check_legacy(const unsigned char *blob, const ssize_t len) +cltrack_check_legacy(const unsigned char *blob, const ssize_t len, + bool has_session) { int ret; struct stat st; @@ -323,7 +341,7 @@ cltrack_check_legacy(const unsigned char *blob, const ssize_t len) } /* Dir exists, try to insert record into db */ - ret = sqlite_insert_client(blob, len); + ret = sqlite_insert_client(blob, len, has_session, has_session); if (ret) { xlog(D_GENERAL, "Failed to insert client: %d", ret); return -EREMOTEIO; @@ -343,6 +361,7 @@ cltrack_check(const char *id) { int ret; ssize_t len; + bool has_session; xlog(D_GENERAL, "%s: check client record", __func__); @@ -354,9 +373,11 @@ cltrack_check(const char *id) if (len < 0) return (int)len; - ret = sqlite_check_client(blob, len); + has_session = cltrack_client_has_session(); + + ret = sqlite_check_client(blob, len, has_session); if (ret) - ret = cltrack_check_legacy(blob, len); + ret = cltrack_check_legacy(blob, len, has_session); return ret ? -EPERM : ret; } diff --git a/utils/nfsdcltrack/sqlite.c b/utils/nfsdcltrack/sqlite.c index 5d38ccb7c0fe..4ff0a37b30e9 100644 --- a/utils/nfsdcltrack/sqlite.c +++ b/utils/nfsdcltrack/sqlite.c @@ -368,14 +368,20 @@ out_close: * Returns a non-zero sqlite error code, or SQLITE_OK (aka 0) */ int -sqlite_insert_client(const unsigned char *clname, const size_t namelen) +sqlite_insert_client(const unsigned char *clname, const size_t namelen, + const bool has_session, const bool zerotime) { int ret; sqlite3_stmt *stmt = NULL; - ret = sqlite3_prepare_v2(dbh, "INSERT OR REPLACE INTO clients VALUES " - "(?, strftime('%s', 'now'), 0);", -1, - &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)); @@ -390,6 +396,13 @@ sqlite_insert_client(const unsigned char *clname, const size_t namelen) 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; @@ -445,7 +458,8 @@ out_err: * return an error. */ int -sqlite_check_client(const unsigned char *clname, const size_t namelen) +sqlite_check_client(const unsigned char *clname, const size_t namelen, + const bool has_session) { int ret; sqlite3_stmt *stmt = NULL; @@ -480,6 +494,12 @@ sqlite_check_client(const unsigned char *clname, const size_t namelen) 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 " diff --git a/utils/nfsdcltrack/sqlite.h b/utils/nfsdcltrack/sqlite.h index 3713bfb66e2f..bf4ba352b99e 100644 --- a/utils/nfsdcltrack/sqlite.h +++ b/utils/nfsdcltrack/sqlite.h @@ -21,9 +21,11 @@ #define _SQLITE_H_ int sqlite_prepare_dbh(const char *topdir); -int sqlite_insert_client(const unsigned char *clname, const size_t namelen); +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); +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); #endif /* _SQLITE_H */ -- 1.9.3