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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>
This commit is contained in:
Steve French 2020-02-06 17:31:56 -06:00
parent 2391ca41b4
commit ab3459d8f0
2 changed files with 30 additions and 0 deletions
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22
fs/cifs/smb2pdu.c
View File

@ -1939,6 +1939,16 @@ parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
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 @@ smb2_parse_contexts(struct TCP_Server_Info *server,
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 @@ smb2_parse_contexts(struct TCP_Server_Info *server,
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)

8
fs/cifs/smb2pdu.h
View File

@ -1595,4 +1595,12 @@ struct smb2_file_network_open_info {
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 */