diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 13302e94fee3d1ede7d2a646cace52aded1cec0d..f578ef9bc1f4dbc039ffce2081d64e5049de041d 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -456,6 +456,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
seq_puts(s, ",hard");
if (tcon->use_persistent)
seq_puts(s, ",persistenthandles");
+ else if (tcon->use_resilient)
+ seq_puts(s, ",resilienthandles");
if (tcon->unix_ext)
seq_puts(s, ",unix");
else
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 81273fea898f1ecc8130746aea9ff8aa36a5f21f..2b510c537a0d588c532fe9200cdd4a9b03a4c9f4 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -496,6 +496,7 @@ struct smb_vol {
bool nosharesock:1;
bool persistent:1;
bool nopersistent:1;
+ bool resilient:1; /* noresilient not required since not fored for CA */
unsigned int rsize;
unsigned int wsize;
bool sockopt_tcp_nodelay:1;
@@ -897,6 +898,7 @@ struct cifs_tcon {
bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
bool broken_sparse_sup; /* if server or share does not support sparse */
bool need_reconnect:1; /* connection reset, tid now invalid */
+ bool use_resilient:1; /* use resilient instead of durable handles */
bool use_persistent:1; /* use persistent instead of durable handles */
#ifdef CONFIG_CIFS_SMB2
bool print:1; /* set if connection to printer share */
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index bb35ae735a8e4b67a7a2dd81464b144f244f7fda..4042996ddc7c6f6a7ccc5c389b20c5147751800b 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -88,6 +88,7 @@ enum {
Opt_fsc, Opt_mfsymlinks,
Opt_multiuser, Opt_sloppy, Opt_nosharesock,
Opt_persistent, Opt_nopersistent,
+ Opt_resilient, Opt_noresilient,
/* Mount options which take numeric value */
Opt_backupuid, Opt_backupgid, Opt_uid,
@@ -172,6 +173,8 @@ static const match_table_t cifs_mount_option_tokens = {
{ Opt_nosharesock, "nosharesock" },
{ Opt_persistent, "persistenthandles"},
{ Opt_nopersistent, "nopersistenthandles"},
+ { Opt_resilient, "resilienthandles"},
+ { Opt_noresilient, "noresilienthandles"},
{ Opt_backupuid, "backupuid=%s" },
{ Opt_backupgid, "backupgid=%s" },
@@ -1510,12 +1513,23 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
break;
case Opt_persistent:
vol->persistent = true;
- if (vol->nopersistent) {
+ if ((vol->nopersistent) || (vol->resilient)) {
cifs_dbg(VFS,
"persistenthandles mount options conflict\n");
goto cifs_parse_mount_err;
}
break;
+ case Opt_resilient:
+ vol->resilient = true;
+ if (vol->persistent) {
+ cifs_dbg(VFS,
+ "persistenthandles mount options conflict\n");
+ goto cifs_parse_mount_err;
+ }
+ break;
+ case Opt_noresilient:
+ vol->resilient = false; /* already the default */
+ break;
/* Numeric Values */
case Opt_backupuid:
@@ -2681,6 +2695,7 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
"SMB3 or later required for persistent handles\n");
rc = -EOPNOTSUPP;
goto out_fail;
+#ifdef CONFIG_CIFS_SMB2
} else if (ses->server->capabilities &
SMB2_GLOBAL_CAP_PERSISTENT_HANDLES)
tcon->use_persistent = true;
@@ -2689,12 +2704,23 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
"Persistent handles not supported on share\n");
rc = -EOPNOTSUPP;
goto out_fail;
+#endif /* CONFIG_CIFS_SMB2 */
}
+#ifdef CONFIG_CIFS_SMB2
} else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
&& (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES)
&& (volume_info->nopersistent == false)) {
cifs_dbg(FYI, "enabling persistent handles\n");
tcon->use_persistent = true;
+#endif /* CONFIG_CIFS_SMB2 */
+ } else if (volume_info->resilient) {
+ if (ses->server->vals->protocol_id == 0) {
+ cifs_dbg(VFS,
+ "SMB2.1 or later required for resilient handles\n");
+ rc = -EOPNOTSUPP;
+ goto out_fail;
+ }
+ tcon->use_resilient = true;
}
/*
@@ -3545,12 +3571,15 @@ cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
goto mount_fail_check;
}
+#ifdef CONFIG_CIFS_SMB2
if ((volume_info->persistent == true) && ((ses->server->capabilities &
SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) == 0)) {
cifs_dbg(VFS, "persistent handles not supported by server\n");
rc = -EOPNOTSUPP;
goto mount_fail_check;
}
+#endif /* CONFIG_CIFS_SMB2*/
+
/* search for existing tcon to this server share */
tcon = cifs_get_tcon(ses, volume_info);
if (IS_ERR(tcon)) {
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
index 2ab297dae5a7b2b4e544e3f35abc5f09b9fa7b1d..f9e766f464beec408b628146c4e0d4e04010e0f2 100644
--- a/fs/cifs/smb2file.c
+++ b/fs/cifs/smb2file.c
@@ -43,6 +43,7 @@ smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
struct smb2_file_all_info *smb2_data = NULL;
__u8 smb2_oplock[17];
struct cifs_fid *fid = oparms->fid;
+ struct network_resiliency_req nr_ioctl_req;
smb2_path = cifs_convert_path_to_utf16(oparms->path, oparms->cifs_sb);
if (smb2_path == NULL) {
@@ -67,6 +68,24 @@ smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
if (rc)
goto out;
+
+ if (oparms->tcon->use_resilient) {
+ nr_ioctl_req.Timeout = 0; /* use server default (120 seconds) */
+ nr_ioctl_req.Reserved = 0;
+ rc = SMB2_ioctl(xid, oparms->tcon, fid->persistent_fid,
+ fid->volatile_fid, FSCTL_LMR_REQUEST_RESILIENCY, true,
+ (char *)&nr_ioctl_req, sizeof(nr_ioctl_req),
+ NULL, NULL /* no return info */);
+ if (rc == -EOPNOTSUPP) {
+ cifs_dbg(VFS,
+ "resiliency not supported by server, disabling\n");
+ oparms->tcon->use_resilient = false;
+ } else if (rc)
+ cifs_dbg(FYI, "error %d setting resiliency\n", rc);
+
+ rc = 0;
+ }
+
if (buf) {
/* open response does not have IndexNumber field - get it */
rc = SMB2_get_srv_num(xid, oparms->tcon, fid->persistent_fid,