diff --git a/nfs.conf b/nfs.conf new file mode 100644 index 0000000..690645c --- /dev/null +++ b/nfs.conf @@ -0,0 +1,71 @@ +# +# This is a general conifguration for the +# NFS daemons and tools +# +#[exportfs] +# debug=0 +# +#[gssd] +# use-memcache=0 +# use-machine-creds=1 +# avoid-dns=1 +# limit-to-legacy-enctypes=0 +# context-timeout=0 +# rpc-timeout=5 +# pipefs-directory=/var/lib/nfs/rpc_pipefs +# keytab-file=/etc/krb5.keytab +# cred-cache-directory= +# preferred-realm= +# +#[lockd] +# port=0 +# udp-port=0 +# +#[mountd] +# debug=0 +# manage_gids=n +# descriptors=0 +# port=0 +# threads=1 +# reverse-lookup=n +# state-directory-path=/var/lib/nfs +# ha-callout= +# +#[nfsdcltrack] +# debug=0 +# storagedir=/var/lib/nfs/nfsdcltrack +# +#[nfsd] +# debug=0 +# threads=8 +# host= +# port=0 +# grace-time=90 +# lease-time=90 +# udp=y +# tcp=y +# vers2=n +# vers3=y +# vers4=y +# vers4.0=y +# vers4.1=y +# vers4.2=y +# rdma=n +# +#[statd] +# debug=0 +# port=0 +# outgoing-port=0 +# name= +# state-directory-path=/var/lib/nfs/statd +# ha-callout= +# +#[sm-notify] +# debug=0 +# retry-time=900 +# outgoing-port= +# outgoing-addr= +# lift-grace=y +# +#[svcgssd] +# principal= diff --git a/utils/statd/sm-notify.c b/utils/statd/sm-notify.c index dcb85a3..ec59311 100644 --- a/utils/statd/sm-notify.c +++ b/utils/statd/sm-notify.c @@ -46,6 +46,10 @@ #define NSM_TIMEOUT 2 #define NSM_MAX_TIMEOUT 120 /* don't make this too big */ +#define NLM_END_GRACE_FILE "/proc/fs/lockd/nlm_end_grace" + +int lift_grace = 1; + struct nsm_host { struct nsm_host * next; char * name; @@ -456,6 +460,28 @@ retry: return sock; } +/* Inform the kernel that it's OK to lift lockd's grace period */ +static void +nsm_lift_grace_period(void) +{ + int fd; + + fd = open(NLM_END_GRACE_FILE, O_WRONLY); + if (fd < 0) { + /* Don't warn if file isn't present */ + if (errno != ENOENT) + xlog(L_WARNING, "Unable to open %s: %m", + NLM_END_GRACE_FILE); + return; + } + + if (write(fd, "Y", 1) < 0) + xlog(L_WARNING, "Unable to write to %s: %m", NLM_END_GRACE_FILE); + + close(fd); + return; +} + int main(int argc, char **argv) { @@ -474,6 +500,7 @@ main(int argc, char **argv) opt_max_retry = conf_get_num("sm-notify", "retry-time", opt_max_retry / 60) * 60; opt_srcport = conf_get_str("sm-notify", "outgoing-port"); opt_srcaddr = conf_get_str("sm-notify", "outgoing-addr"); + lift_grace = conf_get_bool("sm-notify", "lift-grace", lift_grace); s = conf_get_str("statd", "state-directory-path"); if (s && !nsm_setup_pathnames(argv[0], s)) exit(1); @@ -550,6 +577,8 @@ usage: fprintf(stderr, (void)nsm_retire_monitored_hosts(); if (nsm_load_notify_list(smn_get_host) == 0) { xlog(D_GENERAL, "No hosts to notify; exiting"); + if (lift_grace) + nsm_lift_grace_period(); return 0; } diff --git a/utils/statd/sm-notify.man b/utils/statd/sm-notify.man index 89627e5..4658d86 100644 --- a/utils/statd/sm-notify.man +++ b/utils/statd/sm-notify.man @@ -241,6 +241,24 @@ These have the same effect as the command line options .B v respectively. +An additional value recognized in the +.B [sm-notify] +section is +.BR lift-grace . +By default, +.B sm-notify +will lift lockd's grace period early if it has no hosts to notify. +Some high availability configurations will run one +.B sm-notify +per floating IP address. In these configurations, lifting the +grace period early may prevent clients from reclaiming locks. +.RB "Setting " lift-grace " to " n +will prevent +.B sm-notify +from ending the grace period early. +.B lift-grace +has no corresponding command line option. + The value recognized in the .B [statd] section is