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data cache invalidation on delegation recalls

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when we receive a delegation recall, we need to make a downcall
to the kernel and change a buffering/caching policy on this file.

on each open and close we pass an srv_open pointer to the nfsd to
keep in case it receives a cb_recall. we store srv_open in the
delegation state if we got a delegation.
This commit is contained in:
Olga Kornievskaia 2012-01-19 19:46:03 -05:00
parent 909947f07a
commit c22c2b6080
6 changed files with 107 additions and 14 deletions
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25
daemon/open.c
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@ -211,6 +211,11 @@ static int do_open(
/* allocate delegation state and register it with the client */
nfs41_delegation_granted(state->session, &state->parent,
&state->file, &delegation, TRUE, &deleg_state);
if (deleg_state) {
deleg_state->srv_open = state->srv_open;
dprintf(1, "do_open: received delegation: saving srv_open = %x\n",
state->srv_open);
}
AcquireSRWLockExclusive(&state->lock);
/* update the stateid */
@ -270,12 +275,15 @@ static int parse_open(unsigned char *buffer, uint32_t length, nfs41_upcall *upca
if (status) goto out;
status = safe_read(&buffer, &length, &args->mode, sizeof(DWORD));
if (status) goto out;
status = safe_read(&buffer, &length, &args->srv_open, sizeof(HANDLE));
if (status) goto out;
dprintf(1, "parsing NFS41_OPEN: filename='%s' access mask=%d "
"access mode=%d\n\tfile attrs=0x%x create attrs=0x%x "
"(kernel) disposition=%d\n\topen_owner_id=%d mode=%o\n",
args->path, args->access_mask, args->access_mode, args->file_attrs,
args->create_opts, args->disposition, args->open_owner_id, args->mode);
"(kernel) disposition=%d\n\topen_owner_id=%d mode=%o "
"srv_open=%x\n", args->path, args->access_mask, args->access_mode,
args->file_attrs, args->create_opts, args->disposition,
args->open_owner_id, args->mode, args->srv_open);
print_disposition(2, args->disposition);
print_access_mask(2, args->access_mask);
print_share_mode(2, args->access_mode);
@ -432,6 +440,7 @@ static int handle_open(nfs41_upcall *upcall)
args->open_owner_id, status);
goto out;
}
state->srv_open = args->srv_open;
// first check if windows told us it's a directory
if (args->create_opts & FILE_DIRECTORY_FILE)
@ -700,6 +709,8 @@ static int parse_close(unsigned char *buffer, uint32_t length, nfs41_upcall *upc
status = safe_read(&buffer, &length, &args->remove, sizeof(BOOLEAN));
if (status) goto out;
status = safe_read(&buffer, &length, &args->srv_open, sizeof(HANDLE));
if (status) goto out;
if (args->remove) {
status = get_name(&buffer, &length, &args->path);
if (status) goto out;
@ -707,8 +718,9 @@ static int parse_close(unsigned char *buffer, uint32_t length, nfs41_upcall *upc
if (status) goto out;
}
dprintf(1, "parsing NFS41_CLOSE: remove=%d renamed=%d filename='%s'\n",
args->remove, args->renamed, args->remove ? args->path : "");
dprintf(1, "parsing NFS41_CLOSE: remove=%d srv_open=%x renamed=%d "
"filename='%s'\n", args->remove, args->srv_open, args->renamed,
args->remove ? args->path : "");
out:
return status;
}
@ -742,6 +754,9 @@ static int handle_close(nfs41_upcall *upcall)
if (state->type == NF4REG)
pnfs_layout_state_close(state->session, state, args->remove);
if (state->srv_open == args->srv_open)
nfs41_delegation_remove_srvopen(state->session, &state->file);
if (args->remove) {
nfs41_component *name = &state->file.name;