diff options
Diffstat (limited to 'fs/cifs/smb2pdu.c')
| -rw-r--r-- | fs/cifs/smb2pdu.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index a02f6b674d0f..5e947db322a7 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -368,6 +368,7 @@ smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1) #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2) +#define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100) static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) @@ -391,21 +392,35 @@ build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) } static void +build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) +{ + pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; + pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); +} + +static void assemble_neg_contexts(struct smb2_negotiate_req *req, unsigned int *total_len) { char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT; + unsigned int ctxt_len; + *total_len += 2; /* Add 2 due to round to 8 byte boundary for 1st ctxt */ build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); - /* Add 2 to size to round to 8 byte boundary */ + ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8; + *total_len += ctxt_len; + pneg_ctxt += ctxt_len; - pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context); build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); - req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT); - req->NegotiateContextCount = cpu_to_le16(2); + ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8; + *total_len += ctxt_len; + pneg_ctxt += ctxt_len; + + build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt); + *total_len += sizeof(struct smb2_posix_neg_context); - *total_len += 4 + sizeof(struct smb2_preauth_neg_context) - + sizeof(struct smb2_encryption_neg_context); + req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT); + req->NegotiateContextCount = cpu_to_le16(3); } static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt) @@ -488,6 +503,8 @@ static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) rc = decode_encrypt_ctx(server, (struct smb2_encryption_neg_context *)pctx); + else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) + server->posix_ext_supported = true; else cifs_dbg(VFS, "unknown negcontext of type %d ignored\n", le16_to_cpu(pctx->ContextType)); |