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dll: fuse: fuse_operations WIP

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This commit is contained in:
Bill Zissimopoulos 2016-06-08 14:42:12 -07:00
parent 6b99160625
commit 20fc185530
3 changed files with 182 additions and 6 deletions
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8
src/dll/fuse/fuse.c
View File

@ -251,7 +251,7 @@ static NTSTATUS fsp_fuse_svcstart(FSP_SERVICE *Service, ULONG argc, PWSTR *argv)
struct fuse_conn_info conn;
NTSTATUS Result;
context = fsp_fuse_get_context(f->env);
context = fsp_fuse_get_context(0);
if (0 == context)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
@ -259,6 +259,7 @@ static NTSTATUS fsp_fuse_svcstart(FSP_SERVICE *Service, ULONG argc, PWSTR *argv)
}
context->fuse = f;
context->private_data = f->data;
context->uid = context->gid = -1;
memset(&conn, 0, sizeof conn);
conn.proto_major = 7; /* pretend that we are FUSE kernel protocol 7.12 */
@ -376,7 +377,7 @@ static NTSTATUS fsp_fuse_svcstart(FSP_SERVICE *Service, ULONG argc, PWSTR *argv)
fsp_fuse_op_query_security);
FspFileSystemSetOperation(f->FileSystem, FspFsctlTransactSetSecurityKind,
fsp_fuse_op_set_security);
//FspFileSystemSetOperationGuard(f->FileSystem, 0, 0);
FspFileSystemSetOperationGuard(f->FileSystem, fsp_fuse_op_enter, fsp_fuse_op_leave);
FspFileSystemSetDebugLog(f->FileSystem, f->DebugLog);
@ -623,7 +624,7 @@ FSP_FUSE_API void fsp_fuse_exit(struct fsp_fuse_env *env,
FspServiceStop(f->Service);
}
FSP_FUSE_API struct fuse_context *fsp_fuse_get_context(struct fsp_fuse_env *env)
FSP_FUSE_API struct fuse_context *fsp_fuse_get_context(struct fsp_fuse_env *reserved)
{
struct fuse_context *context;
@ -639,6 +640,7 @@ FSP_FUSE_API struct fuse_context *fsp_fuse_get_context(struct fsp_fuse_env *env)
return 0;
memset(context, 0, sizeof *context);
context->pid = -1;
TlsSetValue(fsp_fuse_tlskey, context);
}

176
src/dll/fuse/fuseop.c
View File

@ -17,12 +17,182 @@
#include <dll/fuse/library.h>
static NTSTATUS fsp_fuse_op_set_context(FSP_FILE_SYSTEM *FileSystem, HANDLE Token)
{
struct fuse_context *context;
UINT32 Uid = -1, Gid = -1;
union
{
TOKEN_USER V;
UINT8 B[128];
} UserInfoBuf;
PTOKEN_USER UserInfo = &UserInfoBuf.V;
union
{
TOKEN_PRIMARY_GROUP V;
UINT8 B[128];
} GroupInfoBuf;
PTOKEN_PRIMARY_GROUP GroupInfo = &GroupInfoBuf.V;
DWORD Size;
NTSTATUS Result;
context = fsp_fuse_get_context(0);
if (0 == context)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
if (0 != Token)
{
if (!GetTokenInformation(Token, TokenUser, UserInfo, sizeof UserInfoBuf, &Size))
{
if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
UserInfo = MemAlloc(Size);
if (0 == UserInfo)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
if (!GetTokenInformation(Token, TokenUser, UserInfo, Size, &Size))
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
}
if (!GetTokenInformation(Token, TokenPrimaryGroup, GroupInfo, sizeof GroupInfoBuf, &Size))
{
if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
GroupInfo = MemAlloc(Size);
if (0 == UserInfo)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
if (!GetTokenInformation(Token, TokenPrimaryGroup, GroupInfo, Size, &Size))
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
}
Result = FspPosixMapSidToUid(UserInfo->User.Sid, &Uid);
if (!NT_SUCCESS(Result))
goto exit;
Result = FspPosixMapSidToUid(GroupInfo->PrimaryGroup, &Gid);
if (!NT_SUCCESS(Result))
goto exit;
}
context->fuse = FileSystem->UserContext;
context->uid = Uid;
context->gid = Gid;
Result = STATUS_SUCCESS;
exit:
if (UserInfo != &UserInfoBuf.V)
MemFree(UserInfo);
if (GroupInfo != &GroupInfoBuf.V)
MemFree(GroupInfo);
return Result;
}
VOID fsp_fuse_op_enter(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response)
{
}
VOID fsp_fuse_op_leave(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response)
{
struct fuse_context *context;
context = fsp_fuse_get_context(0);
context->fuse = 0;
context->uid = -1;
context->gid = -1;
}
NTSTATUS fsp_fuse_op_get_security_by_name(FSP_FILE_SYSTEM *FileSystem,
PWSTR FileName, PUINT32 PFileAttributes,
PSECURITY_DESCRIPTOR SecurityDescriptor, SIZE_T *PSecurityDescriptorSize)
PSECURITY_DESCRIPTOR SecurityDescriptorBuf, SIZE_T *PSecurityDescriptorSize)
{
/* not a true file system op, required for access checks! */
return STATUS_INVALID_DEVICE_REQUEST;
struct fuse *f = FileSystem->UserContext;
char *PosixPath = 0;
PSECURITY_DESCRIPTOR SecurityDescriptor = 0;
SIZE_T SecurityDescriptorSize;
struct fuse_stat stbuf;
int err;
NTSTATUS Result;
if (0 == f->ops.getattr)
return STATUS_INVALID_DEVICE_REQUEST;
Result = FspPosixMapWindowsToPosixPath(FileName, &PosixPath);
if (!NT_SUCCESS(Result))
goto exit;
memset(&stbuf, 0, sizeof stbuf);
err = f->ops.getattr(PosixPath, (void *)&stbuf);
if (0 != err)
{
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
goto exit;
}
if (0 != PFileAttributes)
*PFileAttributes = (stbuf.st_mode & 0040000) ?
FILE_ATTRIBUTE_DIRECTORY : FILE_ATTRIBUTE_NORMAL;
if (0 != PSecurityDescriptorSize)
{
Result = FspPosixMapPermissionsToSecurityDescriptor(
stbuf.st_uid, stbuf.st_gid, stbuf.st_mode, &SecurityDescriptor);
if (!NT_SUCCESS(Result))
goto exit;
SecurityDescriptorSize = GetSecurityDescriptorLength(SecurityDescriptor);
if (SecurityDescriptorSize > *PSecurityDescriptorSize)
{
*PSecurityDescriptorSize = SecurityDescriptorSize;
Result = STATUS_BUFFER_OVERFLOW;
goto exit;
}
*PSecurityDescriptorSize = SecurityDescriptorSize;
if (0 != SecurityDescriptorBuf)
memcpy(SecurityDescriptorBuf, SecurityDescriptor, SecurityDescriptorSize);
}
Result = STATUS_SUCCESS;
exit:
if (0 != SecurityDescriptor)
FspDeleteSecurityDescriptor(SecurityDescriptor,
FspPosixMapPermissionsToSecurityDescriptor);
if (0 != PosixPath)
FspPosixDeletePath(PosixPath);
return Result;
}
NTSTATUS fsp_fuse_op_create(FSP_FILE_SYSTEM *FileSystem,

4
src/dll/fuse/library.h
View File

@ -37,6 +37,10 @@ struct fuse
BOOLEAN fsinit;
};
VOID fsp_fuse_op_enter(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response);
VOID fsp_fuse_op_leave(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response);
NTSTATUS fsp_fuse_op_get_security_by_name(FSP_FILE_SYSTEM *FileSystem,
PWSTR FileName, PUINT32 PFileAttributes,
PSECURITY_DESCRIPTOR SecurityDescriptor, SIZE_T *PSecurityDescriptorSize);