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adding nocache mount options

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This commit is contained in:
Olga Kornievskaia 2011-12-08 17:47:34 -05:00
parent aed1493e90
commit 6292181f8d
1 changed files with 28 additions and 13 deletions
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41
sys/nfs41_driver.c
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@ -319,6 +319,7 @@ typedef struct _NFS41_MOUNT_CONFIG {
DWORD WriteSize;
BOOLEAN ReadOnly;
BOOLEAN write_thru;
BOOLEAN nocache;
WCHAR srv_buffer[SERVER_NAME_BUFFER_SIZE];
UNICODE_STRING SrvName;
WCHAR mntpt_buffer[MAX_PATH];
@ -352,6 +353,7 @@ typedef struct _NFS41_V_NET_ROOT_EXTENSION {
DWORD sec_flavor;
BOOLEAN read_only;
BOOLEAN write_thru;
BOOLEAN nocache;
#define STORE_MOUNT_SEC_CONTEXT
#ifdef STORE_MOUNT_SEC_CONTEXT
SECURITY_CLIENT_CONTEXT mount_sec_ctx;
@ -2412,6 +2414,7 @@ void nfs41_MountConfig_InitDefaults(
Config->WriteSize = MOUNT_CONFIG_RW_SIZE_DEFAULT;
Config->ReadOnly = FALSE;
Config->write_thru = FALSE;
Config->nocache = FALSE;
Config->SrvName.Length = 0;
Config->SrvName.MaximumLength = SERVER_NAME_BUFFER_SIZE;
Config->SrvName.Buffer = Config->srv_buffer;
@ -2508,6 +2511,11 @@ NTSTATUS nfs41_MountConfig_ParseOptions(
status = nfs41_MountConfig_ParseBoolean(Option, &usValue,
&Config->write_thru);
}
else if (wcsncmp(L"nocache", Name, NameLen) == 0)
{
status = nfs41_MountConfig_ParseBoolean(Option, &usValue,
&Config->nocache);
}
else if (wcsncmp(L"rsize", Name, NameLen) == 0)
{
status = nfs41_MountConfig_ParseDword(Option, &usValue,
@ -2708,6 +2716,7 @@ NTSTATUS nfs41_CreateVNetRoot(
goto out;
pVNetRootContext->read_only = Config.ReadOnly;
pVNetRootContext->write_thru = Config.write_thru;
pVNetRootContext->nocache = Config.nocache;
} else {
/* use the SRV_CALL name (without leading \) as the hostname */
Config.SrvName.Buffer = pSrvCall->pSrvCallName->Buffer + 1;
@ -3335,19 +3344,23 @@ NTSTATUS nfs41_Create(
SrvOpen->BufferingFlags |= FCB_STATE_DISABLE_LOCAL_BUFFERING;
#else
// turn on read caching
if (params.DesiredAccess & FILE_READ_DATA)
SrvOpen->BufferingFlags |=
(FCB_STATE_READBUFFERING_ENABLED | FCB_STATE_READCACHING_ENABLED);
// turn on write caching only if the file opened for both reading and writing
// we current CANT turn on write-only caching because RDBSS translates a write
// into a read first which leads to a NFS4ERR_IO error from the server because
// the file was opened read-only.
if (/*(params.DesiredAccess & FILE_READ_DATA) && */
(params.DesiredAccess & FILE_WRITE_DATA ||
params.DesiredAccess & FILE_APPEND_DATA) &&
!pVNetRootContext->write_thru)
SrvOpen->BufferingFlags |=
(FCB_STATE_WRITECACHING_ENABLED | FCB_STATE_WRITEBUFFERING_ENABLED);
if (pVNetRootContext->nocache)
SrvOpen->BufferingFlags = FCB_STATE_DISABLE_LOCAL_BUFFERING;
else {
if (params.DesiredAccess & FILE_READ_DATA)
SrvOpen->BufferingFlags |=
(FCB_STATE_READBUFFERING_ENABLED | FCB_STATE_READCACHING_ENABLED);
// turn on write caching only if the file opened for both reading and writing
// we current CANT turn on write-only caching because RDBSS translates a write
// into a read first which leads to a NFS4ERR_IO error from the server because
// the file was opened read-only.
if (/*(params.DesiredAccess & FILE_READ_DATA) && */
(params.DesiredAccess & FILE_WRITE_DATA ||
params.DesiredAccess & FILE_APPEND_DATA) &&
!pVNetRootContext->write_thru)
SrvOpen->BufferingFlags |=
(FCB_STATE_WRITECACHING_ENABLED | FCB_STATE_WRITEBUFFERING_ENABLED);
}
#endif
}
@ -5002,6 +5015,7 @@ NTSTATUS nfs41_Read (
if (!BooleanFlagOn(LowIoContext->ParamsFor.ReadWrite.Flags,
LOWIO_READWRITEFLAG_PAGING_IO) &&
(SrvOpen->DesiredAccess & FILE_READ_DATA) &&
!pVNetRootContext->nocache &&
!(SrvOpen->BufferingFlags &
(FCB_STATE_READBUFFERING_ENABLED | FCB_STATE_READCACHING_ENABLED)))
enable_caching(SrvOpen);
@ -5095,6 +5109,7 @@ NTSTATUS nfs41_Write (
(SrvOpen->DesiredAccess & FILE_WRITE_DATA) &&
(SrvOpen->DesiredAccess & FILE_READ_DATA) &&
!pVNetRootContext->write_thru &&
!pVNetRootContext->nocache &&
!(SrvOpen->BufferingFlags &
(FCB_STATE_WRITEBUFFERING_ENABLED | FCB_STATE_WRITECACHING_ENABLED)))
enable_caching(SrvOpen);