smb3: print warning once if posix context returned on open
SMB3.1.1 POSIX Context processing is not complete yet - so print warning
(once) if server returns it on open.
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 47cce0b..1234f9c 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1939,6 +1939,16 @@
buf->IndexNumber = pdisk_id->DiskFileId;
}
+static void
+parse_posix_ctxt(struct create_context *cc, struct smb_posix_info *pposix_inf)
+{
+ /* struct smb_posix_info *ppinf = (struct smb_posix_info *)cc; */
+
+ /* TODO: Need to add parsing for the context and return */
+ printk_once(KERN_WARNING
+ "SMB3 3.11 POSIX response context not completed yet\n");
+}
+
void
smb2_parse_contexts(struct TCP_Server_Info *server,
struct smb2_create_rsp *rsp,
@@ -1950,6 +1960,9 @@
unsigned int next;
unsigned int remaining;
char *name;
+ const char smb3_create_tag_posix[] = {0x93, 0xAD, 0x25, 0x50, 0x9C,
+ 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83,
+ 0xDE, 0x96, 0x8B, 0xCD, 0x7C};
*oplock = 0;
data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
@@ -1969,6 +1982,15 @@
else if (buf && (le16_to_cpu(cc->NameLength) == 4) &&
strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0)
parse_query_id_ctxt(cc, buf);
+ else if ((le16_to_cpu(cc->NameLength) == 16)) {
+ if (memcmp(name, smb3_create_tag_posix, 16) == 0)
+ parse_posix_ctxt(cc, NULL);
+ }
+ /* else {
+ cifs_dbg(FYI, "Context not matched with len %d\n",
+ le16_to_cpu(cc->NameLength));
+ cifs_dump_mem("Cctxt name: ", name, 4);
+ } */
next = le32_to_cpu(cc->Next);
if (!next)
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 4c43dbd..ca2123d 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -1595,4 +1595,12 @@
extern char smb2_padding[7];
+/* equivalent of the contents of SMB3.1.1 POSIX open context response */
+struct smb_posix_info {
+ __le32 nlink;
+ __le32 reparse_tag;
+ __le32 mode;
+ kuid_t uid;
+ kuid_t gid;
+};
#endif /* _SMB2PDU_H */
