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driver: fix for is_root_directory()

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is_root_directory() was failing to take mount paths into account, causing it to ignore the cached volume attributes and make unnecessary upcalls when a mount path was specified

because the mount path is only available during nfs41_CreateVNetRoot(), its length is now saved in the new field NFS41_V_NET_ROOT_EXTENSION.MountPathLen for use in is_root_directory()

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2012-05-03 12:44:19 -04:00 • committed by unknown
parent 7a6379b198
commit 2e10b99489
1 changed files with 11 additions and 4 deletions
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15
sys/nfs41_driver.c
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@ -387,6 +387,7 @@ typedef struct _NFS41_V_NET_ROOT_EXTENSION {
FILE_FS_ATTRIBUTE_INFORMATION FsAttrs;
DWORD sec_flavor;
DWORD timeout;
USHORT MountPathLen;
BOOLEAN read_only;
BOOLEAN write_thru;
BOOLEAN nocache;
@ -2977,6 +2978,7 @@ NTSTATUS nfs41_CreateVNetRoot(
Config->SrvName.MaximumLength =
pSrvCall->pSrvCallName->MaximumLength - sizeof(WCHAR);
}
pVNetRootContext->MountPathLen = Config->MntPt.Length;
pVNetRootContext->timeout = Config->timeout;
status = map_sec_flavor(&Config->SecFlavor, &pVNetRootContext->sec_flavor);
@ -4284,10 +4286,15 @@ static BOOLEAN is_root_directory(
{
__notnull PV_NET_ROOT VNetRoot = (PV_NET_ROOT)
RxContext->pRelevantSrvOpen->pVNetRoot;
/* compare the FileObject name with the VNetRoot prefix to determine
* whether it's the root directory (allowing for added \) */
return RxContext->CurrentIrpSp->FileObject->FileName.Length <=
VNetRoot->PrefixEntry.Prefix.Length + sizeof(WCHAR);
__notnull PNFS41_V_NET_ROOT_EXTENSION pVNetRootContext =
NFS41GetVNetRootExtension(RxContext->pRelevantSrvOpen->pVNetRoot);
/* calculate the root directory's length, including vnetroot prefix,
* mount path, and a trailing \ */
const USHORT RootPathLen = VNetRoot->PrefixEntry.Prefix.Length +
pVNetRootContext->MountPathLen + sizeof(WCHAR);
return RxContext->CurrentIrpSp->FileObject->FileName.Length <= RootPathLen;
}
NTSTATUS nfs41_QueryVolumeInformation(