Opt_sign, Opt_seal, Opt_noac,
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,
{ Opt_multiuser, "multiuser" },
{ Opt_sloppy, "sloppy" },
{ Opt_nosharesock, "nosharesock" },
+ { Opt_persistent, "persistenthandles"},
+ { Opt_nopersistent, "nopersistenthandles"},
+ { Opt_resilient, "resilienthandles"},
+ { Opt_noresilient, "noresilienthandles"},
{ Opt_backupuid, "backupuid=%s" },
{ Opt_backupgid, "backupgid=%s" },
case Opt_nosharesock:
vol->nosharesock = true;
break;
+ case Opt_nopersistent:
+ vol->nopersistent = true;
+ if (vol->persistent) {
+ cifs_dbg(VFS,
+ "persistenthandles mount options conflict\n");
+ goto cifs_parse_mount_err;
+ }
+ break;
+ case Opt_persistent:
+ vol->persistent = true;
+ 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:
cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
{
int rc = 0;
- char *desc, *delim, *payload;
+ const char *delim, *payload;
+ char *desc;
ssize_t len;
struct key *key;
struct TCP_Server_Info *server = ses->server;
struct sockaddr_in *sa;
struct sockaddr_in6 *sa6;
- struct user_key_payload *upayload;
+ const struct user_key_payload *upayload;
desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
if (!desc)
}
down_read(&key->sem);
- upayload = key->payload.data;
+ upayload = user_key_payload(key);
if (IS_ERR_OR_NULL(upayload)) {
rc = upayload ? PTR_ERR(upayload) : -EINVAL;
goto out_key_put;
}
/* find first : in payload */
- payload = (char *)upayload->data;
+ payload = upayload->data;
delim = strnchr(payload, upayload->datalen, ':');
cifs_dbg(FYI, "payload=%s\n", payload);
if (!delim) {
cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
}
tcon->seal = volume_info->seal;
+ tcon->use_persistent = false;
+ /* check if SMB2 or later, CIFS does not support persistent handles */
+ if (volume_info->persistent) {
+ if (ses->server->vals->protocol_id == 0) {
+ cifs_dbg(VFS,
+ "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;
+ else /* persistent handles requested but not supported */ {
+ cifs_dbg(VFS,
+ "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;
+ }
+
/*
* We can have only one retry value for a connection to a share so for
* resources mounted more than once to the same server share the last
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)) {
goto ssetup_exit;
}
- msg = spnego_key->payload.data;
+ msg = spnego_key->payload.data[0];
/*
* check version field to make sure that cifs.upcall is
* sending us a response in an expected form
return 0;
}
+ static struct create_durable_v2 *
+ create_durable_v2_buf(struct cifs_fid *pfid)
+ {
+ struct create_durable_v2 *buf;
+
+ buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
+ if (!buf)
+ return NULL;
+
+ buf->ccontext.DataOffset = cpu_to_le16(offsetof
+ (struct create_durable_v2, dcontext));
+ buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
+ buf->ccontext.NameOffset = cpu_to_le16(offsetof
+ (struct create_durable_v2, Name));
+ buf->ccontext.NameLength = cpu_to_le16(4);
+
+ buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
+ buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
+ get_random_bytes(buf->dcontext.CreateGuid, 16);
+ memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
+
+ /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
+ buf->Name[0] = 'D';
+ buf->Name[1] = 'H';
+ buf->Name[2] = '2';
+ buf->Name[3] = 'Q';
+ return buf;
+ }
+
+ static struct create_durable_handle_reconnect_v2 *
+ create_reconnect_durable_v2_buf(struct cifs_fid *fid)
+ {
+ struct create_durable_handle_reconnect_v2 *buf;
+
+ buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
+ GFP_KERNEL);
+ if (!buf)
+ return NULL;
+
+ buf->ccontext.DataOffset =
+ cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
+ dcontext));
+ buf->ccontext.DataLength =
+ cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
+ buf->ccontext.NameOffset =
+ cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
+ Name));
+ buf->ccontext.NameLength = cpu_to_le16(4);
+
+ buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
+ buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
+ buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
+ memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
+
+ /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
+ buf->Name[0] = 'D';
+ buf->Name[1] = 'H';
+ buf->Name[2] = '2';
+ buf->Name[3] = 'C';
+ return buf;
+ }
+
static int
- add_durable_context(struct kvec *iov, unsigned int *num_iovec,
+ add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
+ struct cifs_open_parms *oparms)
+ {
+ struct smb2_create_req *req = iov[0].iov_base;
+ unsigned int num = *num_iovec;
+
+ iov[num].iov_base = create_durable_v2_buf(oparms->fid);
+ if (iov[num].iov_base == NULL)
+ return -ENOMEM;
+ iov[num].iov_len = sizeof(struct create_durable_v2);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset =
+ cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
+ iov[1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
+ inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
+ *num_iovec = num + 1;
+ return 0;
+ }
+
+ static int
+ add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
struct cifs_open_parms *oparms)
{
struct smb2_create_req *req = iov[0].iov_base;
unsigned int num = *num_iovec;
+ /* indicate that we don't need to relock the file */
+ oparms->reconnect = false;
+
+ iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
+ if (iov[num].iov_base == NULL)
+ return -ENOMEM;
+ iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset =
+ cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
+ iov[1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength,
+ sizeof(struct create_durable_handle_reconnect_v2));
+ inc_rfc1001_len(&req->hdr,
+ sizeof(struct create_durable_handle_reconnect_v2));
+ *num_iovec = num + 1;
+ return 0;
+ }
+
+ static int
+ add_durable_context(struct kvec *iov, unsigned int *num_iovec,
+ struct cifs_open_parms *oparms, bool use_persistent)
+ {
+ struct smb2_create_req *req = iov[0].iov_base;
+ unsigned int num = *num_iovec;
+
+ if (use_persistent) {
+ if (oparms->reconnect)
+ return add_durable_reconnect_v2_context(iov, num_iovec,
+ oparms);
+ else
+ return add_durable_v2_context(iov, num_iovec, oparms);
+ }
+
if (oparms->reconnect) {
iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
/* indicate that we don't need to relock the file */
ccontext->Next =
cpu_to_le32(server->vals->create_lease_size);
}
- rc = add_durable_context(iov, &num_iovecs, oparms);
+
+ rc = add_durable_context(iov, &num_iovecs, oparms,
+ tcon->use_persistent);
if (rc) {
cifs_small_buf_release(req);
kfree(copy_path);
git.samba.org / sfrench / cifs-2.6.git / commitdiff