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-rw-r--r--fs/nfsd/nfs4recover.c136
-rw-r--r--fs/nfsd/nfs4state.c63
-rw-r--r--fs/nfsd/state.h15
3 files changed, 156 insertions, 58 deletions
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 6523809839c..e616f88b7f1 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -43,9 +43,20 @@
#define NFSDDBG_FACILITY NFSDDBG_PROC
+/* Declarations */
+struct nfsd4_client_tracking_ops {
+ int (*init)(struct net *);
+ void (*exit)(struct net *);
+ void (*create)(struct nfs4_client *);
+ void (*remove)(struct nfs4_client *);
+ int (*check)(struct nfs4_client *);
+ void (*grace_done)(struct net *, time_t);
+};
+
/* Globals */
static struct file *rec_file;
static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
+static struct nfsd4_client_tracking_ops *client_tracking_ops;
static int
nfs4_save_creds(const struct cred **original_creds)
@@ -117,7 +128,8 @@ out_no_tfm:
return status;
}
-void nfsd4_create_clid_dir(struct nfs4_client *clp)
+static void
+nfsd4_create_clid_dir(struct nfs4_client *clp)
{
const struct cred *original_cred;
char *dname = clp->cl_recdir;
@@ -264,7 +276,7 @@ out_unlock:
return status;
}
-void
+static void
nfsd4_remove_clid_dir(struct nfs4_client *clp)
{
const struct cred *original_cred;
@@ -291,7 +303,6 @@ out:
if (status)
printk("NFSD: Failed to remove expired client state directory"
" %.*s\n", HEXDIR_LEN, clp->cl_recdir);
- return;
}
static int
@@ -310,8 +321,9 @@ purge_old(struct dentry *parent, struct dentry *child)
return 0;
}
-void
-nfsd4_recdir_purge_old(void) {
+static void
+nfsd4_recdir_purge_old(struct net *net, time_t boot_time)
+{
int status;
if (!rec_file)
@@ -342,7 +354,7 @@ load_recdir(struct dentry *parent, struct dentry *child)
return 0;
}
-int
+static int
nfsd4_recdir_load(void) {
int status;
@@ -360,8 +372,8 @@ nfsd4_recdir_load(void) {
* Hold reference to the recovery directory.
*/
-void
-nfsd4_init_recdir()
+static int
+nfsd4_init_recdir(void)
{
const struct cred *original_cred;
int status;
@@ -376,20 +388,37 @@ nfsd4_init_recdir()
printk("NFSD: Unable to change credentials to find recovery"
" directory: error %d\n",
status);
- return;
+ return status;
}
rec_file = filp_open(user_recovery_dirname, O_RDONLY | O_DIRECTORY, 0);
if (IS_ERR(rec_file)) {
printk("NFSD: unable to find recovery directory %s\n",
user_recovery_dirname);
+ status = PTR_ERR(rec_file);
rec_file = NULL;
}
nfs4_reset_creds(original_cred);
+ return status;
}
-void
+static int
+nfsd4_load_reboot_recovery_data(struct net *net)
+{
+ int status;
+
+ nfs4_lock_state();
+ status = nfsd4_init_recdir();
+ if (!status)
+ status = nfsd4_recdir_load();
+ nfs4_unlock_state();
+ if (status)
+ printk(KERN_ERR "NFSD: Failure reading reboot recovery data\n");
+ return status;
+}
+
+static void
nfsd4_shutdown_recdir(void)
{
if (!rec_file)
@@ -398,6 +427,13 @@ nfsd4_shutdown_recdir(void)
rec_file = NULL;
}
+static void
+nfsd4_legacy_tracking_exit(struct net *net)
+{
+ nfs4_release_reclaim();
+ nfsd4_shutdown_recdir();
+}
+
/*
* Change the NFSv4 recovery directory to recdir.
*/
@@ -424,3 +460,83 @@ nfs4_recoverydir(void)
{
return user_recovery_dirname;
}
+
+static int
+nfsd4_check_legacy_client(struct nfs4_client *clp)
+{
+ /* did we already find that this client is stable? */
+ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
+ return 0;
+
+ /* look for it in the reclaim hashtable otherwise */
+ if (nfsd4_find_reclaim_client(clp)) {
+ set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
+ return 0;
+ }
+
+ return -ENOENT;
+}
+
+static struct nfsd4_client_tracking_ops nfsd4_legacy_tracking_ops = {
+ .init = nfsd4_load_reboot_recovery_data,
+ .exit = nfsd4_legacy_tracking_exit,
+ .create = nfsd4_create_clid_dir,
+ .remove = nfsd4_remove_clid_dir,
+ .check = nfsd4_check_legacy_client,
+ .grace_done = nfsd4_recdir_purge_old,
+};
+
+int
+nfsd4_client_tracking_init(struct net *net)
+{
+ int status;
+
+ client_tracking_ops = &nfsd4_legacy_tracking_ops;
+
+ status = client_tracking_ops->init(net);
+ if (status) {
+ printk(KERN_WARNING "NFSD: Unable to initialize client "
+ "recovery tracking! (%d)\n", status);
+ client_tracking_ops = NULL;
+ }
+ return status;
+}
+
+void
+nfsd4_client_tracking_exit(struct net *net)
+{
+ if (client_tracking_ops) {
+ client_tracking_ops->exit(net);
+ client_tracking_ops = NULL;
+ }
+}
+
+void
+nfsd4_client_record_create(struct nfs4_client *clp)
+{
+ if (client_tracking_ops)
+ client_tracking_ops->create(clp);
+}
+
+void
+nfsd4_client_record_remove(struct nfs4_client *clp)
+{
+ if (client_tracking_ops)
+ client_tracking_ops->remove(clp);
+}
+
+int
+nfsd4_client_record_check(struct nfs4_client *clp)
+{
+ if (client_tracking_ops)
+ return client_tracking_ops->check(clp);
+
+ return -EOPNOTSUPP;
+}
+
+void
+nfsd4_record_grace_done(struct net *net, time_t boot_time)
+{
+ if (client_tracking_ops)
+ client_tracking_ops->grace_done(net, boot_time);
+}
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 8be612abd0d..1841f8bf845 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -2085,7 +2085,7 @@ nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *csta
goto out;
status = nfs_ok;
- nfsd4_create_clid_dir(cstate->session->se_client);
+ nfsd4_client_record_create(cstate->session->se_client);
out:
nfs4_unlock_state();
return status;
@@ -2280,7 +2280,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
conf = find_confirmed_client_by_str(unconf->cl_recdir,
hash);
if (conf) {
- nfsd4_remove_clid_dir(conf);
+ nfsd4_client_record_remove(conf);
expire_client(conf);
}
move_to_confirmed(unconf);
@@ -3159,7 +3159,7 @@ static void
nfsd4_end_grace(void)
{
dprintk("NFSD: end of grace period\n");
- nfsd4_recdir_purge_old();
+ nfsd4_record_grace_done(&init_net, boot_time);
locks_end_grace(&nfsd4_manager);
/*
* Now that every NFSv4 client has had the chance to recover and
@@ -3208,7 +3208,7 @@ nfs4_laundromat(void)
clp = list_entry(pos, struct nfs4_client, cl_lru);
dprintk("NFSD: purging unused client (clientid %08x)\n",
clp->cl_clientid.cl_id);
- nfsd4_remove_clid_dir(clp);
+ nfsd4_client_record_remove(clp);
expire_client(clp);
}
spin_lock(&recall_lock);
@@ -3639,7 +3639,7 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
__func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
- nfsd4_create_clid_dir(oo->oo_owner.so_client);
+ nfsd4_client_record_create(oo->oo_owner.so_client);
status = nfs_ok;
out:
if (!cstate->replay_owner)
@@ -4481,7 +4481,7 @@ nfs4_client_to_reclaim(const char *name)
return 1;
}
-static void
+void
nfs4_release_reclaim(void)
{
struct nfs4_client_reclaim *crp = NULL;
@@ -4501,7 +4501,7 @@ nfs4_release_reclaim(void)
/*
* called from OPEN, CLAIM_PREVIOUS with a new clientid. */
-static struct nfs4_client_reclaim *
+struct nfs4_client_reclaim *
nfsd4_find_reclaim_client(struct nfs4_client *clp)
{
unsigned int strhashval;
@@ -4521,22 +4521,6 @@ nfsd4_find_reclaim_client(struct nfs4_client *clp)
return NULL;
}
-static int
-nfsd4_client_record_check(struct nfs4_client *clp)
-{
- /* did we already find that this client is stable? */
- if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
- return 0;
-
- /* look for it in the reclaim hashtable otherwise */
- if (nfsd4_find_reclaim_client(clp)) {
- set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
- return 0;
- }
-
- return -ENOENT;
-}
-
/*
* Called from OPEN. Look for clientid in reclaim list.
*/
@@ -4562,7 +4546,7 @@ void nfsd_forget_clients(u64 num)
nfs4_lock_state();
list_for_each_entry_safe(clp, next, &client_lru, cl_lru) {
- nfsd4_remove_clid_dir(clp);
+ nfsd4_client_record_remove(clp);
expire_client(clp);
if (++count == num)
break;
@@ -4697,19 +4681,6 @@ nfs4_state_init(void)
reclaim_str_hashtbl_size = 0;
}
-static void
-nfsd4_load_reboot_recovery_data(void)
-{
- int status;
-
- nfs4_lock_state();
- nfsd4_init_recdir();
- status = nfsd4_recdir_load();
- nfs4_unlock_state();
- if (status)
- printk("NFSD: Failure reading reboot recovery data\n");
-}
-
/*
* Since the lifetime of a delegation isn't limited to that of an open, a
* client may quite reasonably hang on to a delegation as long as it has
@@ -4738,7 +4709,15 @@ nfs4_state_start(void)
{
int ret;
- nfsd4_load_reboot_recovery_data();
+ /*
+ * FIXME: For now, we hang most of the pernet global stuff off of
+ * init_net until nfsd is fully containerized. Eventually, we'll
+ * need to pass a net pointer into this function, take a reference
+ * to that instead and then do most of the rest of this on a per-net
+ * basis.
+ */
+ get_net(&init_net);
+ nfsd4_client_tracking_init(&init_net);
boot_time = get_seconds();
locks_start_grace(&nfsd4_manager);
printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
@@ -4762,8 +4741,8 @@ nfs4_state_start(void)
out_free_laundry:
destroy_workqueue(laundry_wq);
out_recovery:
- nfs4_release_reclaim();
- nfsd4_shutdown_recdir();
+ nfsd4_client_tracking_exit(&init_net);
+ put_net(&init_net);
return ret;
}
@@ -4797,7 +4776,8 @@ __nfs4_state_shutdown(void)
unhash_delegation(dp);
}
- nfsd4_shutdown_recdir();
+ nfsd4_client_tracking_exit(&init_net);
+ put_net(&init_net);
}
void
@@ -4807,7 +4787,6 @@ nfs4_state_shutdown(void)
destroy_workqueue(laundry_wq);
locks_end_grace(&nfsd4_manager);
nfs4_lock_state();
- nfs4_release_reclaim();
__nfs4_state_shutdown();
nfs4_unlock_state();
nfsd4_destroy_callback_queue();
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 115215723f7..89ab137d379 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -457,6 +457,8 @@ extern __be32 nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
extern void nfs4_lock_state(void);
extern void nfs4_unlock_state(void);
extern int nfs4_in_grace(void);
+extern void nfs4_release_reclaim(void);
+extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct nfs4_client *crp);
extern __be32 nfs4_check_open_reclaim(clientid_t *clid);
extern void nfs4_free_openowner(struct nfs4_openowner *);
extern void nfs4_free_lockowner(struct nfs4_lockowner *);
@@ -471,16 +473,17 @@ extern void nfsd4_destroy_callback_queue(void);
extern void nfsd4_shutdown_callback(struct nfs4_client *);
extern void nfs4_put_delegation(struct nfs4_delegation *dp);
extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname);
-extern void nfsd4_init_recdir(void);
-extern int nfsd4_recdir_load(void);
-extern void nfsd4_shutdown_recdir(void);
extern int nfs4_client_to_reclaim(const char *name);
extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id);
-extern void nfsd4_recdir_purge_old(void);
-extern void nfsd4_create_clid_dir(struct nfs4_client *clp);
-extern void nfsd4_remove_clid_dir(struct nfs4_client *clp);
extern void release_session_client(struct nfsd4_session *);
extern __be32 nfs4_validate_stateid(struct nfs4_client *, stateid_t *);
extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner *);
+/* nfs4recover operations */
+extern int nfsd4_client_tracking_init(struct net *net);
+extern void nfsd4_client_tracking_exit(struct net *net);
+extern void nfsd4_client_record_create(struct nfs4_client *clp);
+extern void nfsd4_client_record_remove(struct nfs4_client *clp);
+extern int nfsd4_client_record_check(struct nfs4_client *clp);
+extern void nfsd4_record_grace_done(struct net *net, time_t boot_time);
#endif /* NFSD4_STATE_H */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 07:11:27 +0000