From 0154269f9c122440b841e06c2c16cde10c26bf7b Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Fri, 10 Mar 2017 11:36:39 +1100 Subject: NFSD: fix nfsd_minorversion(.., NFSD_AVAIL) [ Upstream commit 928c6fb3a9bfd6c5b287aa3465226add551c13c0 ] Current code will return 1 if the version is supported, and -1 if it isn't. This is confusing and inconsistent with the one place where this is used. So change to return 1 if it is supported, and zero if not. i.e. an error is never returned. Signed-off-by: NeilBrown Signed-off-by: J. Bruce Fields Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- fs/nfsd/nfssvc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/nfsd/nfssvc.c') diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 1645b977c9c6..0b752e98d153 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -155,7 +155,8 @@ int nfsd_vers(int vers, enum vers_op change) int nfsd_minorversion(u32 minorversion, enum vers_op change) { - if (minorversion > NFSD_SUPPORTED_MINOR_VERSION) + if (minorversion > NFSD_SUPPORTED_MINOR_VERSION && + change != NFSD_AVAIL) return -1; switch(change) { case NFSD_SET: -- cgit v1.2.3 From 817f60ccf72cf7d98c4a96d408660bbbcb495489 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Fri, 10 Mar 2017 11:36:39 +1100 Subject: NFSD: fix nfsd_reset_versions for NFSv4. [ Upstream commit 800a938f0bf9130c8256116649c0cc5806bfb2fd ] If you write "-2 -3 -4" to the "versions" file, it will notice that no versions are enabled, and nfsd_reset_versions() is called. This enables all major versions, not no minor versions. So we lose the invariant that NFSv4 is only advertised when at least one minor is enabled. Fix the code to explicitly enable minor versions for v4, change it to use nfsd_vers() to test and set, and simplify the code. Signed-off-by: NeilBrown Signed-off-by: J. Bruce Fields Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- fs/nfsd/nfssvc.c | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-) (limited to 'fs/nfsd/nfssvc.c') diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 0b752e98d153..5c4800626f13 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -400,23 +400,20 @@ static void nfsd_last_thread(struct svc_serv *serv, struct net *net) void nfsd_reset_versions(void) { - int found_one = 0; int i; - for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) { - if (nfsd_program.pg_vers[i]) - found_one = 1; - } - - if (!found_one) { - for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) - nfsd_program.pg_vers[i] = nfsd_version[i]; -#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) - for (i = NFSD_ACL_MINVERS; i < NFSD_ACL_NRVERS; i++) - nfsd_acl_program.pg_vers[i] = - nfsd_acl_version[i]; -#endif - } + for (i = 0; i < NFSD_NRVERS; i++) + if (nfsd_vers(i, NFSD_TEST)) + return; + + for (i = 0; i < NFSD_NRVERS; i++) + if (i != 4) + nfsd_vers(i, NFSD_SET); + else { + int minor = 0; + while (nfsd_minorversion(minor, NFSD_SET) >= 0) + minor++; + } } /* -- cgit v1.2.3