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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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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;
}