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deny setattr for size if not opened for write

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proposes an alternate solution for attempts to set file size without an open sta
teid.  instead of acquiring one by sending OPEN, fail the request with ACCESS_DE
NIED

according the MS File System Algorithms documentation for setting FileAllocation
Information and FileEndOfFileInformation [http://msdn.microsoft.com/en-us/librar
y/ff469355%28v=PROT.10%29.aspx]:
"If Open.GrantedAccess does not contain FILE_WRITE_DATA, the operation MUST be f
ailed with STATUS_ACCESS_DENIED"

-removes open_owner_id, access_mask, access_mode from setattr upcall arguments
-moves map_access_2_allowdeny() back to open.c as a static function, since handl
e_setattr() was its only other call site
This commit is contained in:
Olga Kornievskaia 2011-06-27 12:01:24 -04:00 • committed by unknown
parent 9f2587c3b3
commit 2db91a3001
6 changed files with 53 additions and 104 deletions
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34
daemon/open.c
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@ -250,6 +250,40 @@ static int map_disposition_2_nfsopen(ULONG disposition, int in_status, bool_t pe
return status;
}
static void map_access_2_allowdeny(ULONG access_mask, ULONG access_mode,
uint32_t *allow, uint32_t *deny)
{
if ((access_mask & FILE_WRITE_DATA) &&
((access_mask & FILE_READ_DATA) ||
(access_mask & FILE_EXECUTE)))
*allow = OPEN4_SHARE_ACCESS_BOTH;
else if ((access_mask & FILE_READ_DATA) ||
(access_mask & FILE_EXECUTE))
*allow = OPEN4_SHARE_ACCESS_READ;
else if (access_mask & FILE_WRITE_DATA ||
(access_mask & FILE_APPEND_DATA) ||
(access_mask & FILE_WRITE_ATTRIBUTES))
*allow = OPEN4_SHARE_ACCESS_WRITE;
#define FIX_ALLOW_DENY_WIN2NFS_CONVERSION
#ifdef FIX_ALLOW_DENY_WIN2NFS_CONVERSION
if ((access_mode & FILE_SHARE_READ) &&
(access_mode & FILE_SHARE_WRITE))
*deny = OPEN4_SHARE_DENY_NONE;
else if (access_mode & FILE_SHARE_READ)
*deny = OPEN4_SHARE_DENY_WRITE;
else if (access_mode & FILE_SHARE_WRITE)
*deny = OPEN4_SHARE_DENY_READ;
else
*deny = OPEN4_SHARE_DENY_BOTH;
#else
// AGLO: 11/13/2009.
// readonly file that is being opened for reading with a
// share read mode given above logic translates into deny
// write and linux server does not allow it.
*deny = OPEN4_SHARE_DENY_NONE;
#endif
}
static int check_execute_access(nfs41_open_state *state)
{
uint32_t supported, access;