diff options
Diffstat (limited to 'src/H5FDmirror_priv.h')
| -rw-r--r-- | src/H5FDmirror_priv.h | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/src/H5FDmirror_priv.h b/src/H5FDmirror_priv.h new file mode 100644 index 0000000..dc15441 --- /dev/null +++ b/src/H5FDmirror_priv.h @@ -0,0 +1,323 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * Copyright by The HDF Group. * + * All rights reserved. * + * * + * This file is part of HDF5. The full HDF5 copyright notice, including * + * terms governing use, modification, and redistribution, is contained in * + * the COPYING file, which can be found at the root of the source code * + * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. * + * If you do not have access to either file, you may request a copy from * + * help@hdfgroup.org. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +/* + * Purpose: Public, shared definitions for Mirror VFD & remote Writer. + */ + +#ifndef H5FDmirror_priv_H +#define H5FDmirror_priv_H + +#ifdef H5_HAVE_MIRROR_VFD + +#ifdef __cplusplus +extern "C" { +#endif + +/* = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = + * IPC - Mirror VFD and Remote Worker application. + * = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = + */ + +/* The maximum allowed size for a receiving buffer when accepting bytes to + * write. Writes larger than this size are performed by multiple accept-write + * steps by the Writer. */ +#define H5FD_MIRROR_DATA_BUFFER_MAX H5_GB /* 1 Gigabyte */ + +#define H5FD_MIRROR_XMIT_CURR_VERSION 1 +#define H5FD_MIRROR_XMIT_MAGIC 0x87F8005B + +#define H5FD_MIRROR_OP_OPEN 1 +#define H5FD_MIRROR_OP_CLOSE 2 +#define H5FD_MIRROR_OP_WRITE 3 +#define H5FD_MIRROR_OP_TRUNCATE 4 +#define H5FD_MIRROR_OP_REPLY 5 +#define H5FD_MIRROR_OP_SET_EOA 6 +#define H5FD_MIRROR_OP_LOCK 7 +#define H5FD_MIRROR_OP_UNLOCK 8 + +#define H5FD_MIRROR_STATUS_OK 0 +#define H5FD_MIRROR_STATUS_ERROR 1 +#define H5FD_MIRROR_STATUS_MESSAGE_MAX 256 /* Dedicated error message size */ + +/* Maximum length of a path/filename string, including the NULL-terminator. + * Must not be smaller than H5FD_SPLITTER_PATH_MAX. */ +#define H5FD_MIRROR_XMIT_FILEPATH_MAX 4097 + +/* Define the exact sizes of the various xmit blobs as sent over the wire. + * This is used to minimize the number of bytes transmitted as well as to + * sanity-check received bytes. + * Any modifications to the xmit structures and/or the encode/decode functions + * must be reflected here. + * */ +#define H5FD_MIRROR_XMIT_HEADER_SIZE 14 +#define H5FD_MIRROR_XMIT_EOA_SIZE (H5FD_MIRROR_XMIT_HEADER_SIZE + 9) +#define H5FD_MIRROR_XMIT_LOCK_SIZE (H5FD_MIRROR_XMIT_HEADER_SIZE + 8) +#define H5FD_MIRROR_XMIT_OPEN_SIZE (H5FD_MIRROR_XMIT_HEADER_SIZE + 20 + H5FD_MIRROR_XMIT_FILEPATH_MAX) +#define H5FD_MIRROR_XMIT_REPLY_SIZE (H5FD_MIRROR_XMIT_HEADER_SIZE + 4 + H5FD_MIRROR_STATUS_MESSAGE_MAX) +#define H5FD_MIRROR_XMIT_WRITE_SIZE (H5FD_MIRROR_XMIT_HEADER_SIZE + 17) + +/* Maximum length of any xmit. */ +#define H5FD_MIRROR_XMIT_BUFFER_MAX MAX2( MAX3(H5FD_MIRROR_XMIT_HEADER_SIZE, \ + H5FD_MIRROR_XMIT_EOA_SIZE, \ + H5FD_MIRROR_XMIT_LOCK_SIZE), \ + MAX3(H5FD_MIRROR_XMIT_OPEN_SIZE, \ + H5FD_MIRROR_XMIT_REPLY_SIZE, \ + H5FD_MIRROR_XMIT_WRITE_SIZE) ) \ + +/* --------------------------------------------------------------------------- + * Structure: H5FD_mirror_xmit_t + * + * Common structure 'header' for all mirror VFD/worker IPC. + * Must be the first component of a derived operation xmit structure, + * such as file-open or write command. + * + * `magic` (uint32_t) + * A "unique" number identifying the structure and endianness of + * transmitting maching. + * Must be set to H5FD_MIRROR_XMIT_MAGIC native to the VFD "sender". + * + * `version` (uint8_t) + * Number used to identify the structure membership. + * Allows sane modifications to this structure in the future. + * Must be set to H5FD_MIRROR_XMIT_CURR_VERSION. + * + * `session_token` (uint32_t) + * A "unique" number identifying the session between VFD sender and + * remote receiver/worker/writer. Exists to help sanity-check. + * + * `xmit_count` (uint32_t) + * Which transmission this is since the session began. + * Used to sanity-check transmission errors. + * First xmit (file-open) must be 0. + * + * `op` (uint8_t) + * Number identifying which operation to perform. + * Corresponds with the extended structure outside of this xmit header. + * Possible values are all defined H5FD_MIRROR_OP_* constants. + * + * --------------------------------------------------------------------------- + */ +typedef struct H5FD_mirror_xmit_t { + uint32_t magic; + uint8_t version; + uint32_t session_token; + uint32_t xmit_count; + uint8_t op; +} H5FD_mirror_xmit_t; + +/* --------------------------------------------------------------------------- + * Structure: H5FD_mirror_xmit_eoa_t + * + * Structure containing eoa-set information from VFD sender. + * + * `pub` (H5FD_mirror_xmit_t) + * Common transmission header, containing session information. + * Must be first. + * + * `type` (uint8_t) + * System-independent alias for H5F[D]_mem_t. + * Specifies datatype to be written. + * + * `eoa_addr` (uint64_t) + * New address for eoa. + * (Natively 'haddr_t', always a 64-bit field) + * + * --------------------------------------------------------------------------- + */ +typedef struct H5FD_mirror_xmit_eoa_t { + H5FD_mirror_xmit_t pub; + uint8_t type; + uint64_t eoa_addr; +} H5FD_mirror_xmit_eoa_t; + +/* --------------------------------------------------------------------------- + * Structure: H5FD_mirror_xmit_lock_t + * + * Structure containing eoa-set information from VFD sender. + * + * `pub` (H5FD_mirror_xmit_t) + * Common transmission header, containing session information. + * Must be first. + * + * `rw` (uint64_t) + * The Read/Write mode flag passed into H5FDlock(). + * (Natively `hbool_t`, an 'int') TODO: native int may be 64-bit? + * + * --------------------------------------------------------------------------- + */ +typedef struct H5FD_mirror_xmit_lock_t { + H5FD_mirror_xmit_t pub; + uint64_t rw; +} H5FD_mirror_xmit_lock_t; + +/* --------------------------------------------------------------------------- + * Structure: H5FD_mirror_xmit_open_t + * + * Structure containing file-open information from the VFD sender. + * + * `pub` (H5FD_mirror_xmit_t) + * Common transmission header, containing session information. + * Must be first. + * + * `flags` (uint32_t) + * VFL-layer file-open flags passed directly to H5FDopen(). + * (Natively 'unsigned [int]') TODO: native int may be 64-bit? + * + * `maxaddr` (uint64_t) + * VFL-layer maximum allowed address space for the file to open passed + * directly to H5FDopen(). + * (Natively 'haddr_t', always a 64-bit field) + * + * `size_t_blob` (uint64_t) + * A number indicating how large a size_t is on the sending system. + * Must be set to (uint64_t)((size_t)(-1)) + * (maximum possible value of size_t, cast to uint64_t). + * The receiving system inspects this value -- if the local (remote) + * size_t is smaller than that of the Sender, issues a warning. + * Not an error, as: + * 1. It is assumed that underlying file systems/drivers have become + * smart enough to handle file sizes that otherwise might be + * constrained. + * 2. The Mirror Writer ingests bytes to write multiple 'slices' if the + * size is greater than H5FD_MIRROR_DATA_BUFFER_MAX, regardless of + * any size_t storage size disparity. + * + * `filename` (char[]) + * String giving the filename and path of file to open. + * + * --------------------------------------------------------------------------- + */ +typedef struct H5FD_mirror_xmit_open_t { + H5FD_mirror_xmit_t pub; + uint32_t flags; + uint64_t maxaddr; + uint64_t size_t_blob; + char filename[H5FD_MIRROR_XMIT_FILEPATH_MAX]; +} H5FD_mirror_xmit_open_t; + +/* --------------------------------------------------------------------------- + * Structure: H5FD_mirror_xmit_reply_t + * + * Structure used by the remote receiver/worker/writer to respond to + * a command from the VFD sender. + * + * `pub` (H5FD_mirror_xmit_t) + * Common transmission header, containing session information. + * Must be first. + * + * `status` (uint32_t) + * Number indicating whether the command was successful or if an + * occured. + * Allowed values are H5FD_MIRROR_STATUS_OK and + * H5FD_MIRROR_STATUS_ERROR. + * + * `message` (char[]) + * Error message. Populated if and only if there was a problem. + * It is possible that a message may reach the end of the alloted + * space without a NULL terminator -- the onus is on the programmer to + * handle this situation. + * + * --------------------------------------------------------------------------- + */ +typedef struct H5FD_mirror_xmit_reply_t { + H5FD_mirror_xmit_t pub; + uint32_t status; + char message[H5FD_MIRROR_STATUS_MESSAGE_MAX]; +} H5FD_mirror_xmit_reply_t; + +/* --------------------------------------------------------------------------- + * Structure: H5FD_mirror_xmit_write_t + * + * Structure containing data-write information from VFD sender. + * + * The data to be written is transmitted in subsequent, packets + * and may be broken up into more than one transmission buffer. + * The VFD sender and remote receiver/worker/writer must coordinate + * the receipt of data. + * + * `pub` (H5FD_mirror_xmit_t) + * Common transmission header, containing session information. + * Must be first. + * + * `type` (uint8_t) + * Specifies datatype to be written. + * (Natively 'H5FD_mem_t', an enumerated type in H5Fpublic.h) + * + * `offset` (uint64_t) + * Start location of write in file. + * (Natively 'haddr_t', always a 64-bit field) + * + * `size` (uint64_t) + * Size of the data to be written, in bytes. + * (Natively 'size_t', accommodate the largest possible as 64-bits) + * + * --------------------------------------------------------------------------- + */ +typedef struct H5FD_mirror_xmit_write_t { + H5FD_mirror_xmit_t pub; + uint8_t type; + uint64_t offset; + uint64_t size; +} H5FD_mirror_xmit_write_t; + + + +/* Encode/decode routines are required to "pack" the xmit data into a known + * byte format for transmission over the wire. + * + * All component numbers must be stored in "network" word order (Big-Endian). + * + * All components must be packed in the order given in the structure definition. + * + * All components must be packed with zero padding between. + */ + +H5_DLL size_t H5FD__mirror_xmit_decode_uint16(uint16_t *out, const unsigned char *buf); +H5_DLL size_t H5FD__mirror_xmit_decode_uint32(uint32_t *out, const unsigned char *buf); +H5_DLL size_t H5FD__mirror_xmit_decode_uint64(uint64_t *out, const unsigned char *buf); +H5_DLL size_t H5FD__mirror_xmit_decode_uint8(uint8_t *out, const unsigned char *buf); +H5_DLL size_t H5FD__mirror_xmit_encode_uint16(unsigned char *dest, uint16_t v); +H5_DLL size_t H5FD__mirror_xmit_encode_uint32(unsigned char *dest, uint32_t v); +H5_DLL size_t H5FD__mirror_xmit_encode_uint64(unsigned char *dest, uint64_t v); +H5_DLL size_t H5FD__mirror_xmit_encode_uint8(unsigned char *dest, uint8_t v); + +H5_DLL size_t H5FD_mirror_xmit_decode_header(H5FD_mirror_xmit_t *out, const unsigned char *buf); +H5_DLL size_t H5FD_mirror_xmit_decode_lock(H5FD_mirror_xmit_lock_t *out, const unsigned char *buf); +H5_DLL size_t H5FD_mirror_xmit_decode_open(H5FD_mirror_xmit_open_t *out, const unsigned char *buf); +H5_DLL size_t H5FD_mirror_xmit_decode_reply(H5FD_mirror_xmit_reply_t *out, const unsigned char *buf); +H5_DLL size_t H5FD_mirror_xmit_decode_set_eoa(H5FD_mirror_xmit_eoa_t *out, const unsigned char *buf); +H5_DLL size_t H5FD_mirror_xmit_decode_write(H5FD_mirror_xmit_write_t *out, const unsigned char *buf); + +H5_DLL size_t H5FD_mirror_xmit_encode_header(unsigned char *dest, const H5FD_mirror_xmit_t *x); +H5_DLL size_t H5FD_mirror_xmit_encode_lock(unsigned char *dest, const H5FD_mirror_xmit_lock_t *x); +H5_DLL size_t H5FD_mirror_xmit_encode_open(unsigned char *dest, const H5FD_mirror_xmit_open_t *x); +H5_DLL size_t H5FD_mirror_xmit_encode_reply(unsigned char *dest, const H5FD_mirror_xmit_reply_t *x); +H5_DLL size_t H5FD_mirror_xmit_encode_set_eoa(unsigned char *dest, const H5FD_mirror_xmit_eoa_t *x); +H5_DLL size_t H5FD_mirror_xmit_encode_write(unsigned char *dest, const H5FD_mirror_xmit_write_t *x); + +H5_DLL hbool_t H5FD_mirror_xmit_is_close(const H5FD_mirror_xmit_t *xmit); +H5_DLL hbool_t H5FD_mirror_xmit_is_lock(const H5FD_mirror_xmit_lock_t *xmit); +H5_DLL hbool_t H5FD_mirror_xmit_is_open(const H5FD_mirror_xmit_open_t *xmit); +H5_DLL hbool_t H5FD_mirror_xmit_is_reply(const H5FD_mirror_xmit_reply_t *xmit); +H5_DLL hbool_t H5FD_mirror_xmit_is_set_eoa(const H5FD_mirror_xmit_eoa_t *xmit); +H5_DLL hbool_t H5FD_mirror_xmit_is_write(const H5FD_mirror_xmit_write_t *xmit); +H5_DLL hbool_t H5FD_mirror_xmit_is_xmit(const H5FD_mirror_xmit_t *xmit); + +#ifdef __cplusplus +} +#endif + +#endif /* H5_HAVE_MIRROR_VFD */ + +#endif /* H5FDmirror_priv_H */ + |