static NTSTATUS PvfsQueryFilePositionInfo( PPVFS_IRP_CONTEXT pIrpContext ) { NTSTATUS ntError = STATUS_UNSUCCESSFUL; PIRP pIrp = pIrpContext->pIrp; PPVFS_CCB pCcb = NULL; PFILE_POSITION_INFORMATION pFileInfo = NULL; IRP_ARGS_QUERY_SET_INFORMATION Args = pIrpContext->pIrp->Args.QuerySetInformation; off_t CurrentOffset = 0; /* Sanity checks */ ntError = PvfsAcquireCCB(pIrp->FileHandle, &pCcb); BAIL_ON_NT_STATUS(ntError); BAIL_ON_INVALID_PTR(Args.FileInformation, ntError); ntError = PvfsAccessCheckAnyFileHandle( pCcb, (FILE_READ_DATA|FILE_WRITE_DATA)); BAIL_ON_NT_STATUS(ntError); if (Args.Length < sizeof(*pFileInfo)) { ntError = STATUS_BUFFER_TOO_SMALL; BAIL_ON_NT_STATUS(ntError); } pFileInfo = (PFILE_POSITION_INFORMATION)Args.FileInformation; /* Real work starts here */ /* Position */ ntError = PvfsSysLseek(pCcb->fd, 0, SEEK_CUR, &CurrentOffset); BAIL_ON_NT_STATUS(ntError); pFileInfo->CurrentByteOffset = CurrentOffset; pIrp->IoStatusBlock.BytesTransferred = sizeof(*pFileInfo); ntError = STATUS_SUCCESS; cleanup: if (pCcb) { PvfsReleaseCCB(pCcb); } return ntError; error: goto cleanup; }
static NTSTATUS PvfsReadInternal( PPVFS_IRP_CONTEXT pIrpContext ) { NTSTATUS ntError = STATUS_UNSUCCESSFUL; PIRP pIrp = pIrpContext->pIrp; PPVFS_CCB pCcb = NULL; PPVFS_PENDING_READ pReadCtx = NULL; /* Sanity checks */ ntError = PvfsAcquireCCB(pIrp->FileHandle, &pCcb); BAIL_ON_NT_STATUS(ntError); if (PVFS_IS_DIR(pCcb)) { ntError = STATUS_FILE_IS_A_DIRECTORY; BAIL_ON_NT_STATUS(ntError); } #if 0xFFFFFFFF > SSIZE_MAX if ((size_t)pIrp->Args.ReadWrite.Length > (size_t) SSIZE_MAX) { ntError = STATUS_INVALID_PARAMETER; BAIL_ON_NT_STATUS(ntError); } #endif /* Check the right permissions based on the PagingIo flag */ if (pIrp->Args.ReadWrite.IsPagingIo) { ntError = PvfsAccessCheckAnyFileHandle( pCcb, FILE_READ_DATA|FILE_EXECUTE); } else { ntError = PvfsAccessCheckFileHandle( pCcb, FILE_READ_DATA); } BAIL_ON_NT_STATUS(ntError); ntError = PvfsCreateReadContext(&pReadCtx, pIrpContext, pCcb); BAIL_ON_NT_STATUS(ntError); ntError = PvfsOplockBreakIfLocked(pIrpContext, pCcb, pCcb->pScb); switch (ntError) { case STATUS_SUCCESS: ntError = PvfsReadFileWithContext(pReadCtx); break; case STATUS_OPLOCK_BREAK_IN_PROGRESS: ntError = PvfsPendOplockBreakTest( pReadCtx->pCcb->pScb, pIrpContext, pReadCtx->pCcb, PvfsReadFileWithContext, PvfsFreeReadContext, (PVOID)pReadCtx); if (ntError == STATUS_PENDING) { pReadCtx = NULL; } break; case STATUS_PENDING: ntError = PvfsAddItemPendingOplockBreakAck( pReadCtx->pCcb->pScb, pIrpContext, PvfsReadFileWithContext, PvfsFreeReadContext, (PVOID)pReadCtx); if (ntError == STATUS_PENDING) { pReadCtx = NULL; } break; } BAIL_ON_NT_STATUS(ntError); cleanup: PvfsFreeReadContext(OUT_PPVOID(&pReadCtx)); if (pCcb) { PvfsReleaseCCB(pCcb); } return ntError; error: goto cleanup; }