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fixing open for FILE_SUPERSEDE

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http://www.osronline.com/showThread.cfm?link=27213
clarifies that unless open for overwrite_if the old file should be
deleted and then created again.
This commit is contained in:
Olga Kornievskaia 2012-03-16 16:34:15 -04:00
parent c6ee60b362
commit 4418ba8b69
1 changed files with 25 additions and 10 deletions
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35
daemon/open.c
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@ -324,22 +324,20 @@ static int map_disposition_2_nfsopen(ULONG disposition, int in_status, bool_t pe
{
int status = NO_ERROR;
if (disposition == FILE_SUPERSEDE) {
if (in_status == NFS4ERR_NOENT) {
*create = OPEN4_CREATE;
if (in_status == NFS4ERR_NOENT)
*last_error = ERROR_FILE_NOT_FOUND;
}
else // we need to truncate the file file then open it
*create = OPEN4_NOCREATE;
//remove and recreate the file
*create = OPEN4_CREATE;
if (persistent) *createhowmode = GUARDED4;
else *createhowmode = EXCLUSIVE4_1;
} else if (disposition == FILE_CREATE) {
// if lookup succeeded which means the file exist, return an error
if (!in_status)
status = ERROR_FILE_EXISTS;
else {
*create = OPEN4_CREATE;
if (persistent)
*createhowmode = GUARDED4;
else
*createhowmode = EXCLUSIVE4_1;
if (persistent) *createhowmode = GUARDED4;
else *createhowmode = EXCLUSIVE4_1;
}
} else if (disposition == FILE_OPEN) {
if (in_status == NFS4ERR_NOENT)
@ -584,7 +582,7 @@ static int handle_open(nfs41_upcall *upcall)
args->mode = info.mode;
args->changeattr = info.change;
} else {
uint32_t create = 0, createhowmode = 0;
uint32_t create = 0, createhowmode = 0, lookup_status = status;
map_access_2_allowdeny(args->access_mask, args->access_mode,
args->disposition, &state->share_access, &state->share_deny);
@ -600,6 +598,21 @@ static int handle_open(nfs41_upcall *upcall)
goto out_free_state;
}
supersede_retry:
// XXX file exists and we have to remove it first
if (args->disposition == FILE_SUPERSEDE && lookup_status == NO_ERROR) {
nfs41_component *name = &state->file.name;
if (!(args->create_opts & FILE_DIRECTORY_FILE))
nfs41_delegation_return(state->session, &state->file,
OPEN_DELEGATE_WRITE, TRUE);
dprintf(1, "open for FILE_SUPERSEDE removing %s first\n", name->name);
status = nfs41_remove(state->session, &state->parent,
name, state->file.fh.fileid);
if (status)
goto out_free_state;
}
if (create == OPEN4_CREATE && (args->create_opts & FILE_DIRECTORY_FILE)) {
status = nfs41_create(state->session, NF4DIR, args->mode, NULL,
&state->parent, &state->file);
@ -621,6 +634,8 @@ static int handle_open(nfs41_upcall *upcall)
dprintf(1, "%s failed with %s\n", (create == OPEN4_CREATE &&
(args->create_opts & FILE_DIRECTORY_FILE))?"nfs41_create":"nfs41_open",
nfs_error_string(status));
if (args->disposition == FILE_SUPERSEDE && status == NFS4ERR_EXIST)
goto supersede_retry;
status = nfs_to_windows_error(status, ERROR_FILE_NOT_FOUND);
goto out_free_state;
}