evin/ms-nfs41-client
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ensuring exactly once semantics for open

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if we are doing CREATE_NEW file creation, then based on whether or not
we have a persistent session, we'll send either GUARDED4 create for
persistent session and EXCLUSIVE4_1 create otherwise.
This commit is contained in:
Olga Kornievskaia 2011-05-24 12:33:58 -04:00
parent cb54018555
commit 54c11cd84b
6 changed files with 42 additions and 41 deletions
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21
daemon/open.c
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@ -199,8 +199,9 @@ static BOOLEAN do_lookup(uint32_t type, ULONG access_mask, ULONG disposition)
}
}
static int map_disposition_2_nfsopen(ULONG disposition, int in_status,
uint32_t *create, uint32_t *last_error)
static int map_disposition_2_nfsopen(ULONG disposition, int in_status, bool_t persistent,
uint32_t *create, uint32_t *createhowmode,
uint32_t *last_error)
{
int status = NO_ERROR;
if (disposition == FILE_SUPERSEDE) {
@ -214,8 +215,13 @@ static int map_disposition_2_nfsopen(ULONG disposition, int in_status,
// if lookup succeeded which means the file exist, return an error
if (!in_status)
status = ERROR_FILE_EXISTS;
else
else {
*create = OPEN4_CREATE;
if (persistent)
*createhowmode = GUARDED4;
else
*createhowmode = EXCLUSIVE4_1;
}
} else if (disposition == FILE_OPEN) {
if (in_status == NFS4ERR_NOENT)
status = ERROR_FILE_NOT_FOUND;
@ -415,11 +421,13 @@ static int handle_open(nfs41_upcall *upcall)
args->mode = info.mode;
args->changeattr = info.change;
} else {
uint32_t create = 0;
uint32_t create = 0, createhowmode = 0;
map_access_2_allowdeny(args->access_mask, args->access_mode,
&state->share_access, &state->share_deny);
status = map_disposition_2_nfsopen(args->disposition, status, &create, &upcall->last_error);
status = map_disposition_2_nfsopen(args->disposition, status,
state->session->flags & CREATE_SESSION4_FLAG_PERSIST,
&create, &createhowmode, &upcall->last_error);
if (status)
goto out_free_state;
@ -436,7 +444,8 @@ static int handle_open(nfs41_upcall *upcall)
args->created = status == NFS4_OK ? TRUE : FALSE;
} else {
status = nfs41_open(state->session, state->share_access,
state->share_deny, create, args->mode, TRUE, state, &info);
state->share_deny, create, createhowmode, args->mode,
TRUE, state, &info);
if (status == NFS4_OK) {
/* add to the client's list of state for recovery */