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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
Download patch file Download diff file Expand all files Collapse all files

34
daemon/open.c
View file

@ -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;

35
daemon/setattr.c
View file

@ -52,19 +52,11 @@ static int parse_setattr(unsigned char *buffer, uint32_t length, nfs41_upcall *u
}
status = safe_read(&buffer, &length, args->buf, args->buf_len);
if (status) goto out_free;
status = safe_read(&buffer, &length, &args->open_owner_id, sizeof(ULONG));
if (status) goto out_free;
status = safe_read(&buffer, &length, &args->access_mask, sizeof(ULONG));
if (status) goto out_free;
status = safe_read(&buffer, &length, &args->access_mode, sizeof(ULONG));
if (status) goto out_free;
args->root = upcall->root_ref;
args->state = upcall->state_ref;
dprintf(1, "parsing NFS41_FILE_SET: filename='%s' info_class=%d "
"buf_len=%d\nopen_owner_id=%d access_mask=%x access_mode=%x\n",
args->path, args->set_class, args->buf_len, args->open_owner_id,
args->access_mask, args->access_mode);
"buf_len=%d\n", args->path, args->set_class, args->buf_len);
out:
return status;
out_free:
@ -467,29 +459,6 @@ static int handle_setattr(nfs41_upcall *upcall)
nfs41_open_state *state = upcall->state_ref;
int status;
switch (args->set_class) {
case FileAllocationInformation:
case FileEndOfFileInformation:
if (!state->do_close) {
// get a stateid
StringCchPrintfA((LPSTR)state->owner.owner, NFS4_OPAQUE_LIMIT,
"%u", args->open_owner_id);
state->owner.owner_len = (uint32_t)strlen(
(const char*)state->owner.owner);
map_access_2_allowdeny(args->access_mask, args->access_mode,
&state->share_access, &state->share_deny);
status = nfs41_open(state->session, state->share_access,
state->share_deny, OPEN4_NOCREATE, 0, 0, TRUE, state, NULL);
if (status) {
dprintf(1, "nfs41_open() failed with %s\n", nfs_error_string(status));
status = nfs_to_windows_error(status, ERROR_FILE_NOT_FOUND);
goto out;
} else
client_state_add(state);
state->do_close = 1;
}
}
switch (args->set_class) {
case FileBasicInformation:
status = handle_nfs41_setattr(args);
@ -513,7 +482,7 @@ static int handle_setattr(nfs41_upcall *upcall)
status = ERROR_NOT_SUPPORTED;
break;
}
out:
free(args->buf);
return status;
}

3
daemon/upcall.h
View file

@ -96,9 +96,6 @@ typedef struct __setattr_upcall_args {
unsigned char *buf;
uint32_t buf_len;
int set_class;
ULONG open_owner_id;
ULONG access_mask;
ULONG access_mode;
} setattr_upcall_args;
typedef struct __setexattr_upcall_args {

35
daemon/util.c
View file

@ -222,41 +222,6 @@ void get_nfs_time(
file_time_to_nfs_time(&file_time, nfs_time);
}
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
}
bool_t multi_addr_find(
IN const multi_addr4 *addrs,
IN const netaddr4 *addr,

6
daemon/util.h
View file

@ -139,12 +139,6 @@ int create_silly_rename(
IN const nfs41_fh *fh,
OUT nfs41_component *silly);
void map_access_2_allowdeny(
IN ULONG access_mask,
IN ULONG access_mode,
OUT uint32_t *allow,
OUT uint32_t *deny);
bool_t multi_addr_find(
IN const multi_addr4 *addrs,
IN const netaddr4 *addr,

44
sys/nfs41_driver.c
View file

@ -179,9 +179,6 @@ typedef struct _updowncall_entry {
PVOID buf;
ULONG buf_len;
FILE_INFORMATION_CLASS InfoClass;
ULONG open_owner_id;
ULONG access_mask;
ULONG access_mode;
} SetFile;
struct {
DWORD mode;
@ -900,19 +897,12 @@ NTSTATUS marshal_nfs41_fileset(nfs41_updowncall_entry *entry,
tmp += sizeof(ULONG);
RtlCopyMemory(tmp, entry->u.SetFile.buf, entry->u.SetFile.buf_len);
tmp += entry->u.SetFile.buf_len;
RtlCopyMemory(tmp, &entry->u.SetFile.open_owner_id, sizeof(ULONG));
tmp += sizeof(ULONG);
RtlCopyMemory(tmp, &entry->u.SetFile.access_mask, sizeof(ULONG));
tmp += sizeof(ULONG);
RtlCopyMemory(tmp, &entry->u.SetFile.access_mode, sizeof(ULONG));
*len = header_len;
DbgP("marshal_nfs41_fileset: filename='%wZ' class=%d open_owner_id=0x%x "
"access_mask=0x%x access_mode=0x%x\n", entry->u.SetFile.filename,
entry->u.SetFile.InfoClass, entry->u.SetFile.open_owner_id,
entry->u.SetFile.access_mask, entry->u.SetFile.access_mode);
print_hexbuf(0, (unsigned char *)"setfile buffer", entry->u.SetFile.buf,
DbgP("marshal_nfs41_fileset: filename='%wZ' class=%d\n",
entry->u.SetFile.filename, entry->u.SetFile.InfoClass);
print_hexbuf(0, (unsigned char *)"setfile buffer", entry->u.SetFile.buf,
entry->u.SetFile.buf_len);
out:
DbgEx();
@ -4012,12 +4002,24 @@ NTSTATUS nfs41_SetFileInformation (
NFS41GetVNetRootExtension(SrvOpen->pVNetRoot);
PNFS41_FCB nfs41_fcb = (PNFS41_FCB)(RxContext->pFcb)->Context;
FILE_RENAME_INFORMATION rinfo;
PFILE_OBJECT fo = RxContext->CurrentIrpSp->FileObject;
PNFS41_NETROOT_EXTENSION pNetRootContext =
NFS41GetNetRootExtension(SrvOpen->pVNetRoot->pNetRoot);
DbgEn();
print_setfile_args(RxContext);
/* http://msdn.microsoft.com/en-us/library/ff469355(v=PROT.10).aspx
* http://msdn.microsoft.com/en-us/library/ff469424(v=PROT.10).aspx
* If Open.GrantedAccess does not contain FILE_WRITE_DATA, the operation
* MUST be failed with STATUS_ACCESS_DENIED.
*/
if (InfoClass == FileAllocationInformation ||
InfoClass == FileEndOfFileInformation) {
if (!(SrvOpen->DesiredAccess & FILE_WRITE_DATA)) {
status = STATUS_ACCESS_DENIED;
goto out;
}
}
switch (InfoClass) {
case FileRenameInformation:
{
@ -4096,19 +4098,7 @@ NTSTATUS nfs41_SetFileInformation (
goto out;
entry->u.SetFile.filename = FileName;
entry->u.SetFile.InfoClass = InfoClass;
switch(InfoClass) {
case FileAllocationInformation:
case FileEndOfFileInformation:
entry->u.SetFile.open_owner_id = get_next_open_owner();
if (fo->ReadAccess)
entry->u.SetFile.access_mask = FILE_READ_DATA;
if (fo->WriteAccess)
entry->u.SetFile.access_mask |= FILE_WRITE_DATA;
if (fo->SharedRead)
entry->u.SetFile.access_mode = FILE_SHARE_READ;
if (fo->SharedWrite)
entry->u.SetFile.access_mode |= FILE_SHARE_WRITE;
}
if (RxContext->Info.FileInformationClass == FileDispositionInformation &&
InfoClass == FileRenameInformation) {
entry->u.SetFile.buf = &rinfo;