evin/ms-nfs41-client
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driver: make mount upcalls for shared mounts

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even if CreateVNetRoot() finds an existing compatible mount, make a MOUNT upcall and pass that session to the daemon.  the daemon can avoid creating a new root/client/seession, but still has a chance to verify the mount path with LOOKUPs and fetch fs attributes for the new VNetRoot

when the daemon is given an existing root, handle_mount() avoids any extra reference counting on it.  while we can make multiple MOUNT upcalls on a shared mount, we'll still only send the one UNMOUNT upcall on FinalizeNetRoot()

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2012-05-04 11:32:31 -04:00 • committed by unknown
parent b48871d807
commit f6e02ff4a0
2 changed files with 37 additions and 30 deletions
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32
sys/nfs41_driver.c
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@ -2619,7 +2619,7 @@ NTSTATUS nfs41_mount(
DbgP("Server Name %wZ Mount Point %wZ SecFlavor %d\n",
&config->SrvName, &config->MntPt, sec_flavor);
#endif
status = nfs41_UpcallCreate(NFS41_MOUNT, NULL, INVALID_HANDLE_VALUE,
status = nfs41_UpcallCreate(NFS41_MOUNT, NULL, *session,
INVALID_HANDLE_VALUE, *version, &config->MntPt, &entry);
if (status) goto out;
@ -3050,23 +3050,21 @@ NTSTATUS nfs41_CreateVNetRoot(
#endif
}
if (!found_existing_mount || !found_matching_flavor) {
/* send the mount upcall */
status = nfs41_mount(Config, pVNetRootContext->sec_flavor,
&pVNetRootContext->session, &nfs41d_version,
&pVNetRootContext->FsAttrs);
if (status != STATUS_SUCCESS) {
if (!found_existing_mount &&
IsListEmpty(&pNetRootContext->mounts.head)) {
pNetRootContext->mounts_init = FALSE;
pVNetRootContext->session = INVALID_HANDLE_VALUE;
}
goto out_free;
/* send the mount upcall */
status = nfs41_mount(Config, pVNetRootContext->sec_flavor,
&pVNetRootContext->session, &nfs41d_version,
&pVNetRootContext->FsAttrs);
if (status != STATUS_SUCCESS) {
if (!found_existing_mount &&
IsListEmpty(&pNetRootContext->mounts.head)) {
pNetRootContext->mounts_init = FALSE;
}
pVNetRootContext->timeout = Config->timeout;
RtlCopyMemory(&pNetRootContext->FsAttrs, &pVNetRootContext->FsAttrs,
sizeof(pVNetRootContext->FsAttrs));
}
pVNetRootContext->session = INVALID_HANDLE_VALUE;
goto out_free;
}
pVNetRootContext->timeout = Config->timeout;
RtlCopyMemory(&pNetRootContext->FsAttrs, &pVNetRootContext->FsAttrs,
sizeof(pVNetRootContext->FsAttrs));
if (!found_existing_mount) {
/* create a new mount entry and add it to the list */