summaryrefslogtreecommitdiff
path: root/fs/nfsd/nfs4recover.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/nfsd/nfs4recover.c')
-rw-r--r--fs/nfsd/nfs4recover.c96
1 files changed, 83 insertions, 13 deletions
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 9affa22e7d35..b4289060ebaf 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -1067,6 +1067,8 @@ MODULE_PARM_DESC(cltrack_legacy_disable,
#define LEGACY_TOPDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_TOPDIR="
#define LEGACY_RECDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_RECDIR="
+#define HAS_SESSION_ENV_PREFIX "NFSDCLTRACK_CLIENT_HAS_SESSION="
+#define GRACE_START_ENV_PREFIX "NFSDCLTRACK_GRACE_START="
static char *
nfsd4_cltrack_legacy_topdir(void)
@@ -1131,10 +1133,60 @@ nfsd4_cltrack_legacy_recdir(const struct xdr_netobj *name)
return result;
}
+static char *
+nfsd4_cltrack_client_has_session(struct nfs4_client *clp)
+{
+ int copied;
+ size_t len;
+ char *result;
+
+ /* prefix + Y/N character + terminating NULL */
+ len = strlen(HAS_SESSION_ENV_PREFIX) + 1 + 1;
+
+ result = kmalloc(len, GFP_KERNEL);
+ if (!result)
+ return result;
+
+ copied = snprintf(result, len, HAS_SESSION_ENV_PREFIX "%c",
+ clp->cl_minorversion ? 'Y' : 'N');
+ if (copied >= len) {
+ /* just return nothing if output was truncated */
+ kfree(result);
+ return NULL;
+ }
+
+ return result;
+}
+
+static char *
+nfsd4_cltrack_grace_start(time_t grace_start)
+{
+ int copied;
+ size_t len;
+ char *result;
+
+ /* prefix + max width of int64_t string + terminating NULL */
+ len = strlen(GRACE_START_ENV_PREFIX) + 22 + 1;
+
+ result = kmalloc(len, GFP_KERNEL);
+ if (!result)
+ return result;
+
+ copied = snprintf(result, len, GRACE_START_ENV_PREFIX "%ld",
+ grace_start);
+ if (copied >= len) {
+ /* just return nothing if output was truncated */
+ kfree(result);
+ return NULL;
+ }
+
+ return result;
+}
+
static int
-nfsd4_umh_cltrack_upcall(char *cmd, char *arg, char *legacy)
+nfsd4_umh_cltrack_upcall(char *cmd, char *arg, char *env0, char *env1)
{
- char *envp[2];
+ char *envp[3];
char *argv[4];
int ret;
@@ -1145,10 +1197,12 @@ nfsd4_umh_cltrack_upcall(char *cmd, char *arg, char *legacy)
dprintk("%s: cmd: %s\n", __func__, cmd);
dprintk("%s: arg: %s\n", __func__, arg ? arg : "(null)");
- dprintk("%s: legacy: %s\n", __func__, legacy ? legacy : "(null)");
+ dprintk("%s: env0: %s\n", __func__, env0 ? env0 : "(null)");
+ dprintk("%s: env1: %s\n", __func__, env1 ? env1 : "(null)");
- envp[0] = legacy;
- envp[1] = NULL;
+ envp[0] = env0;
+ envp[1] = env1;
+ envp[2] = NULL;
argv[0] = (char *)cltrack_prog;
argv[1] = cmd;
@@ -1192,28 +1246,40 @@ bin_to_hex_dup(const unsigned char *src, int srclen)
}
static int
-nfsd4_umh_cltrack_init(struct net __attribute__((unused)) *net)
+nfsd4_umh_cltrack_init(struct net *net)
{
+ int ret;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ char *grace_start = nfsd4_cltrack_grace_start(nn->boot_time);
+
/* XXX: The usermode helper s not working in container yet. */
if (net != &init_net) {
WARN(1, KERN_ERR "NFSD: attempt to initialize umh client "
"tracking in a container!\n");
return -EINVAL;
}
- return nfsd4_umh_cltrack_upcall("init", NULL, NULL);
+
+ ret = nfsd4_umh_cltrack_upcall("init", NULL, grace_start, NULL);
+ kfree(grace_start);
+ return ret;
}
static void
nfsd4_umh_cltrack_create(struct nfs4_client *clp)
{
- char *hexid;
+ char *hexid, *has_session, *grace_start;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len);
if (!hexid) {
dprintk("%s: can't allocate memory for upcall!\n", __func__);
return;
}
- nfsd4_umh_cltrack_upcall("create", hexid, NULL);
+ has_session = nfsd4_cltrack_client_has_session(clp);
+ grace_start = nfsd4_cltrack_grace_start(nn->boot_time);
+ nfsd4_umh_cltrack_upcall("create", hexid, has_session, grace_start);
+ kfree(has_session);
+ kfree(grace_start);
kfree(hexid);
}
@@ -1227,7 +1293,7 @@ nfsd4_umh_cltrack_remove(struct nfs4_client *clp)
dprintk("%s: can't allocate memory for upcall!\n", __func__);
return;
}
- nfsd4_umh_cltrack_upcall("remove", hexid, NULL);
+ nfsd4_umh_cltrack_upcall("remove", hexid, NULL, NULL);
kfree(hexid);
}
@@ -1235,17 +1301,21 @@ static int
nfsd4_umh_cltrack_check(struct nfs4_client *clp)
{
int ret;
- char *hexid, *legacy;
+ char *hexid, *has_session, *legacy;
hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len);
if (!hexid) {
dprintk("%s: can't allocate memory for upcall!\n", __func__);
return -ENOMEM;
}
+
+ has_session = nfsd4_cltrack_client_has_session(clp);
legacy = nfsd4_cltrack_legacy_recdir(&clp->cl_name);
- ret = nfsd4_umh_cltrack_upcall("check", hexid, legacy);
+ ret = nfsd4_umh_cltrack_upcall("check", hexid, has_session, legacy);
+ kfree(has_session);
kfree(legacy);
kfree(hexid);
+
return ret;
}
@@ -1257,7 +1327,7 @@ nfsd4_umh_cltrack_grace_done(struct nfsd_net *nn)
sprintf(timestr, "%ld", nn->boot_time);
legacy = nfsd4_cltrack_legacy_topdir();
- nfsd4_umh_cltrack_upcall("gracedone", timestr, legacy);
+ nfsd4_umh_cltrack_upcall("gracedone", timestr, legacy, NULL);
kfree(legacy);
}