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-rw-r--r--src/H5FDmirror.c2001
1 files changed, 2001 insertions, 0 deletions
diff --git a/src/H5FDmirror.c b/src/H5FDmirror.c
new file mode 100644
index 0000000..ef035c1
--- /dev/null
+++ b/src/H5FDmirror.c
@@ -0,0 +1,2001 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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: Transmit write-only operations to a receiver/writer process on
+ * a remote host.
+ */
+
+#include "H5FDdrvr_module.h" /* This source code file is part of the H5FD driver module */
+
+#include "H5private.h" /* Generic Functions */
+
+#ifdef H5_HAVE_MIRROR_VFD
+
+#include "H5Eprivate.h" /* Error handling */
+#include "H5Fprivate.h" /* File access */
+#include "H5FDprivate.h" /* File drivers */
+#include "H5FDmirror.h" /* "Mirror" definitions */
+#include "H5FLprivate.h" /* Free Lists */
+#include "H5Iprivate.h" /* IDs */
+#include "H5MMprivate.h" /* Memory management */
+#include "H5Pprivate.h" /* Property lists */
+
+/* The driver identification number, initialized at runtime */
+static hid_t H5FD_MIRROR_g = 0;
+
+/* Virtual file structure for a Mirror Driver */
+typedef struct H5FD_mirror_t {
+ H5FD_t pub; /* Public stuff, must be first */
+ H5FD_mirror_fapl_t fa; /* Configuration structure */
+ haddr_t eoa; /* End of allocated region */
+ haddr_t eof; /* End of file; current file size */
+ int sock_fd; /* Handle of socket to remote operator */
+ H5FD_mirror_xmit_t xmit; /* Primary communication header */
+ uint32_t xmit_i; /* Counter of transmission sent and rec'd */
+} H5FD_mirror_t;
+
+/*
+ * These macros check for overflow of various quantities. These macros
+ * assume that HDoff_t is signed and haddr_t and size_t are unsigned.
+ *
+ * ADDR_OVERFLOW: Checks whether a file address of type `haddr_t'
+ * is too large to be represented by the second argument
+ * of the file seek function.
+ *
+ * SIZE_OVERFLOW: Checks whether a buffer size of type `hsize_t' is too
+ * large to be represented by the `size_t' type.
+ *
+ * REGION_OVERFLOW: Checks whether an address and size pair describe data
+ * which can be addressed entirely by the second
+ * argument of the file seek function.
+ */
+#define MAXADDR (((haddr_t)1<<(8*sizeof(HDoff_t)-1))-1)
+#define ADDR_OVERFLOW(A) (HADDR_UNDEF==(A) || ((A) & ~(haddr_t)MAXADDR))
+
+#ifndef BSWAP_64
+#define BSWAP_64(X) \
+ (uint64_t)( (((X) & 0x00000000000000FF) << 56) \
+ | (((X) & 0x000000000000FF00) << 40) \
+ | (((X) & 0x0000000000FF0000) << 24) \
+ | (((X) & 0x00000000FF000000) << 8) \
+ | (((X) & 0x000000FF00000000) >> 8) \
+ | (((X) & 0x0000FF0000000000) >> 24) \
+ | (((X) & 0x00FF000000000000) >> 40) \
+ | (((X) & 0xFF00000000000000) >> 56))
+#endif /* BSWAP_64 */
+
+/* Debugging flabs for verbose tracing -- nonzero to enable */
+#define MIRROR_DEBUG_OP_CALLS 0
+#define MIRROR_DEBUG_XMIT_BYTES 0
+
+#if MIRROR_DEBUG_XMIT_BYTES
+#define LOG_XMIT_BYTES(label, buf, len) do { \
+ ssize_t bytes_written = 0; \
+ const unsigned char *b = NULL; \
+ \
+ HDfprintf(stdout, "%s bytes:\n```\n", (label)); \
+ \
+ /* print whole lines */ \
+ while ((len - bytes_written) >= 32) { \
+ b = (const unsigned char *)(buf) + bytes_written; \
+ HDfprintf(stdout, \
+ "%04zX %02X%02X%02X%02X %02X%02X%02X%02X" \
+ " %02X%02X%02X%02X %02X%02X%02X%02X" \
+ " %02X%02X%02X%02X %02X%02X%02X%02X" \
+ " %02X%02X%02X%02X %02X%02X%02X%02X\n", \
+ bytes_written, \
+ b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], \
+ b[8], b[9], b[10],b[11], b[12],b[13],b[14],b[15], \
+ b[16],b[17],b[18],b[19], b[20],b[21],b[22],b[23], \
+ b[24],b[25],b[26],b[27], b[28],b[29],b[30],b[31]); \
+ bytes_written += 32; \
+ } \
+ \
+ /* start partial line */ \
+ if (len > bytes_written) { \
+ HDfprintf(stdout, "%04zX ", bytes_written); \
+ } \
+ \
+ /* partial line blocks */ \
+ while ((len - bytes_written) >= 4) { \
+ HDfprintf(stdout, " %02X%02X%02X%02X", \
+ (buf)[bytes_written], (buf)[bytes_written+1], \
+ (buf)[bytes_written+2], (buf)[bytes_written+3]); \
+ bytes_written += 4; \
+ } \
+ \
+ /* block separator before partial block */ \
+ if (len > bytes_written) { \
+ HDfprintf(stdout, " "); \
+ } \
+ \
+ /* partial block individual bytes */ \
+ while (len > bytes_written) { \
+ HDfprintf(stdout, "%02X", (buf)[bytes_written++]); \
+ } \
+ \
+ /* end partial line */ \
+ HDfprintf(stdout, "\n"); \
+ HDfprintf(stdout, "```\n"); \
+ HDfflush(stdout); \
+} while (0)
+#else
+#define LOG_XMIT_BYTES(label, buf, len) /* no-op */
+#endif /* MIRROR_DEBUG_XMIT_BYTE */
+
+#if MIRROR_DEBUG_OP_CALLS
+#define LOG_OP_CALL(name) do { \
+ HDprintf("called %s()\n", (name)); \
+ fflush(stdout); \
+} while (0)
+#else
+#define LOG_OP_CALL(name) /* no-op */
+#endif /* MIRROR_DEBUG_OP_CALLS */
+
+/* Prototypes */
+static herr_t H5FD_mirror_term(void);
+static void *H5FD_mirror_fapl_get(H5FD_t *_file);
+static void *H5FD_mirror_fapl_copy(const void *_old_fa);
+static herr_t H5FD_mirror_fapl_free(void *_fa);
+static haddr_t H5FD_mirror_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
+static herr_t H5FD_mirror_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
+static haddr_t H5FD_mirror_get_eof(const H5FD_t *_file, H5FD_mem_t type);
+static H5FD_t *H5FD_mirror_open(const char *name, unsigned flags, \
+ hid_t fapl_id, haddr_t maxaddr);
+static herr_t H5FD_mirror_close(H5FD_t *_file);
+static herr_t H5FD_mirror_query(const H5FD_t *_file, unsigned long *flags);
+static herr_t H5FD_mirror_write(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, \
+ haddr_t addr, size_t size, const void *buf);
+static herr_t H5FD_mirror_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id,
+ haddr_t addr, size_t size, void *buf);
+static herr_t H5FD_mirror_truncate(H5FD_t *_file, hid_t dxpl_id, \
+ hbool_t closing);
+static herr_t H5FD_mirror_lock(H5FD_t *_file, hbool_t rw);
+static herr_t H5FD_mirror_unlock(H5FD_t *_file);
+
+static herr_t H5FD__mirror_verify_reply(H5FD_mirror_t *file);
+
+static const H5FD_class_t H5FD_mirror_g = {
+ "mirror", /* name */
+ MAXADDR, /* maxaddr */
+ H5F_CLOSE_WEAK, /* fc_degree */
+ H5FD_mirror_term, /* terminate */
+ NULL, /* sb_size */
+ NULL, /* sb_encode */
+ NULL, /* sb_decode */
+ 0, /* fapl_size */
+ H5FD_mirror_fapl_get, /* fapl_get */
+ H5FD_mirror_fapl_copy, /* fapl_copy */
+ H5FD_mirror_fapl_free, /* fapl_free */
+ 0, /* dxpl_size */
+ NULL, /* dxpl_copy */
+ NULL, /* dxpl_free */
+ H5FD_mirror_open, /* open */
+ H5FD_mirror_close, /* close */
+ NULL, /* cmp */
+ H5FD_mirror_query, /* query */
+ NULL, /* get_type_map */
+ NULL, /* alloc */
+ NULL, /* free */
+ H5FD_mirror_get_eoa, /* get_eoa */
+ H5FD_mirror_set_eoa, /* set_eoa */
+ H5FD_mirror_get_eof, /* get_eof */
+ NULL, /* get_handle */
+ H5FD_mirror_read, /* read */
+ H5FD_mirror_write, /* write */
+ NULL, /* flush */
+ H5FD_mirror_truncate, /* truncate */
+ H5FD_mirror_lock, /* lock */
+ H5FD_mirror_unlock, /* unlock */
+ H5FD_FLMAP_DICHOTOMY /* fl_map */
+};
+
+/* Declare a free list to manage the H5FD_mirror_t struct */
+H5FL_DEFINE_STATIC(H5FD_mirror_t);
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__init_package
+ *
+ * Purpose: Initializes any interface-specific data or routines.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__init_package(void)
+{
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_STATIC
+
+ LOG_OP_CALL("H5FD__init_package");
+
+ if (H5FD_mirror_init() < 0) {
+ HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL,
+ "unable to initialize mirror VFD");
+ }
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5FD__init_package() */
+
+
+/* -------------------------------------------------------------------------
+ * Function: H5FD_mirror_init
+ *
+ * Purpose: Initialize this driver by registering the driver with the
+ * library.
+ *
+ * Return: Success: The driver ID for the mirror driver.
+ * Failure: Negative
+ * -------------------------------------------------------------------------
+ */
+hid_t
+H5FD_mirror_init(void)
+{
+ hid_t ret_value = H5I_INVALID_HID;
+
+ FUNC_ENTER_NOAPI(FAIL)
+
+ LOG_OP_CALL("H5FD_mirror_init");
+
+ if (H5I_VFL != H5I_get_type(H5FD_MIRROR_g)) {
+ H5FD_MIRROR_g = H5FD_register(&H5FD_mirror_g, sizeof(H5FD_class_t),
+ FALSE);
+ }
+
+ ret_value = H5FD_MIRROR_g;
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD_mirror_init() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_term
+ *
+ * Purpose: Shut down the VFD
+ *
+ * Returns: SUCCEED (Can't fail)
+ * ---------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_mirror_term(void)
+{
+ FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+ /* Reset VFL ID */
+ H5FD_MIRROR_g = 0;
+
+ LOG_OP_CALL("H5FD_mirror_term");
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5FD_mirror_term() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD__mirror_xmit_decode_uint16
+ *
+ * Purpose: Extract a 16-bit integer in "network" (Big-Endian) word order
+ * from the byte-buffer and return it with the local word order at
+ * the destination pointer.
+ *
+ * The programmer must ensure that the received buffer holds
+ * at least the expected size of data.
+ *
+ * Return: The number of bytes read from the buffer (2).
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD__mirror_xmit_decode_uint16(uint16_t *out, const unsigned char *_buf)
+{
+ uint16_t n = 0;
+ LOG_OP_CALL("H5FD__mirror_xmit_decode_uint16");
+ HDassert(_buf && out);
+ HDmemcpy(&n, _buf, sizeof(n));
+ *out = (uint16_t)HDntohs(n);
+ return 2; /* number of bytes eaten */
+} /* end H5FD__mirror_xmit_decode_uint16() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD__mirror_xmit_decode_uint32
+ *
+ * Purpose: Extract a 32-bit integer in "network" (Big-Endian) word order
+ * from the byte-buffer and return it with the local word order at
+ * the destination pointer.
+ *
+ * The programmer must ensure that the received buffer holds
+ * at least the expected size of data.
+ *
+ * Return: The number of bytes read from the buffer (4).
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD__mirror_xmit_decode_uint32(uint32_t *out, const unsigned char *_buf)
+{
+ uint32_t n = 0;
+ LOG_OP_CALL("H5FD__mirror_xmit_decode_uint32");
+ HDassert(_buf && out);
+ HDmemcpy(&n, _buf, sizeof(n));
+ *out = (uint32_t)HDntohl(n);
+ return 4; /* number of bytes eaten */
+} /* end H5FD__mirror_xmit_decode_uint32() */
+
+
+
+/* ---------------------------------------------------------------------------
+ * Function: is_host_little_endian
+ *
+ * Purpose: Determine whether the host machine is is little-endian.
+ *
+ * Store an intger with a known value, re-map the memory to a
+ * character array, and inspect the array's contents.
+ *
+ * Return: The number of bytes written to the buffer (8).
+ *
+ * Programmer: Jacob Smith
+ * 2020-03-05
+ * ---------------------------------------------------------------------------
+ */
+static hbool_t
+is_host_little_endian(void)
+{
+ union {
+ uint32_t u32;
+ uint8_t u8[4];
+ } echeck;
+ echeck.u32 = 0xA1B2C3D4;
+ if (echeck.u8[0] == 0xD4) {
+ return TRUE;
+ }
+ else {
+ return FALSE;
+ }
+} /* end is_host_little_endian() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD__mirror_xmit_decode_uint64
+ *
+ * Purpose: Extract a 64-bit integer in "network" (Big-Endian) word order
+ * from the byte-buffer and return it with the local word order.
+ *
+ * The programmer must ensure that the received buffer holds
+ * at least the expected size of data.
+ *
+ * WARNING: Does not accommodate other forms of endianness,
+ * e.g. "middle-endian".
+ *
+ * Return: The number of bytes written to the buffer (8).
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD__mirror_xmit_decode_uint64(uint64_t *out, const unsigned char *_buf)
+{
+ uint64_t n = 0;
+ LOG_OP_CALL("H5FD__mirror_xmit_decode_uint64");
+ HDassert(_buf && out);
+ HDmemcpy(&n, _buf, sizeof(n));
+ if (TRUE == is_host_little_endian()) {
+ *out = BSWAP_64(n);
+ }
+ else {
+ *out = n;
+ }
+ return 8;
+} /* end H5FD__mirror_xmit_decode_uint64() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD__mirror_xmit_decode_uint8
+ *
+ * Purpose: Extract a 8-bit integer in "network" (Big-Endian) word order
+ * from the byte-buffer and return it with the local word order at
+ * the destination pointer.
+ * (yes, it's one byte).
+ *
+ * Return: The number of bytes read from the buffer (1).
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD__mirror_xmit_decode_uint8(uint8_t *out, const unsigned char *_buf)
+{
+ LOG_OP_CALL("H5FD__mirror_xmit_decode_uint8");
+ HDassert(_buf && out);
+ HDmemcpy(out, _buf, sizeof(uint8_t));
+ return 1; /* number of bytes eaten */
+} /* end H5FD__mirror_xmit_decode_uint8() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD__mirror_xmit_encode_uint16
+ *
+ * Purpose: Encode a 16-bit integer in "network" (Big-Endian) word order
+ * in place in the destination bytes-buffer.
+ *
+ * The programmer must ensure that the destination buffer is
+ * large enough to hold the expected data.
+ *
+ * Return: The number of bytes written to the buffer (2).
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD__mirror_xmit_encode_uint16(unsigned char *_dest, uint16_t v)
+{
+ uint16_t n = 0;
+ LOG_OP_CALL("H5FD__mirror_xmit_encode_uint16");
+ HDassert(_dest);
+ n = (uint16_t)HDhtons(v);
+ HDmemcpy(_dest, &n, sizeof(n));
+ return 2;
+} /* end H5FD__mirror_xmit_encode_uint16() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD__mirror_xmit_encode_uint32
+ *
+ * Purpose: Encode a 32-bit integer in "network" (Big-Endian) word order
+ * in place in the destination bytes-buffer.
+ *
+ * The programmer must ensure that the destination buffer is
+ * large enough to hold the expected data.
+ *
+ * Return: The number of bytes written to the buffer (4).
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD__mirror_xmit_encode_uint32(unsigned char *_dest, uint32_t v)
+{
+ uint32_t n = 0;
+ LOG_OP_CALL("H5FD__mirror_xmit_encode_uint32");
+ HDassert(_dest);
+ n = (uint32_t)HDhtonl(v);
+ HDmemcpy(_dest, &n, sizeof(n));
+ return 4;
+} /* end H5FD__mirror_xmit_encode_uint32() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD__mirror_xmit_encode_uint64
+ *
+ * Purpose: Encode a 64-bit integer in "network" (Big-Endian) word order
+ * in place in the destination bytes-buffer.
+ *
+ * The programmer must ensure that the destination buffer is
+ * large enough to hold the expected data.
+ *
+ * Return: The number of bytes written to the buffer (8).
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD__mirror_xmit_encode_uint64(unsigned char *_dest, uint64_t v)
+{
+ uint64_t n = v;
+ LOG_OP_CALL("H5FD__mirror_xmit_decode_uint64");
+ HDassert(_dest);
+ if (TRUE == is_host_little_endian()) {
+ n = BSWAP_64(v);
+ }
+ HDmemcpy(_dest, &n, sizeof(n));
+ return 8;
+} /* H5FD__mirror_xmit_encode_uint64() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD__mirror_xmit_encode_uint8
+ *
+ * Purpose: Encode a 8-bit integer in "network" (Big-Endian) word order
+ * in place in the destination bytes-buffer.
+ * (yes, it's one byte).
+ *
+ * The programmer must ensure that the destination buffer is
+ * large enough to hold the expected data.
+ *
+ * Return: The number of bytes read from the buffer (1).
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD__mirror_xmit_encode_uint8(unsigned char *dest, uint8_t v)
+{
+ LOG_OP_CALL("H5FD__mirror_xmit_encode_uint8");
+ HDassert(dest);
+ HDmemcpy(dest, &v, sizeof(v));
+ return 1;
+} /* end H5FD__mirror_xmit_encode_uint8() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_decode_header
+ *
+ * Purpose: Extract a mirror_xmit_t "header" from the bytes-buffer.
+ *
+ * Fields will be lifted from the buffer and stored in the
+ * target structure, using in the correct location (different
+ * systems may insert different padding between components) and
+ * word order (Big- vs Little-Endian).
+ *
+ * The resulting structure should be sanity-checked with
+ * H5FD_mirror_xmit_is_xmit() before use.
+ *
+ * The programmer must ensure that the received buffer holds
+ * at least the expected size of data.
+ *
+ * Return: The number of bytes consumed from the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_decode_header(H5FD_mirror_xmit_t *out,
+ const unsigned char *buf)
+{
+ size_t n_eaten = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_decode_header");
+ HDassert(out && buf);
+ n_eaten += H5FD__mirror_xmit_decode_uint32(&(out->magic), &buf[n_eaten]);
+ n_eaten += H5FD__mirror_xmit_decode_uint8(&(out->version), &buf[n_eaten]);
+ n_eaten += H5FD__mirror_xmit_decode_uint32(&(out->session_token),
+ &buf[n_eaten]);
+ n_eaten += H5FD__mirror_xmit_decode_uint32(&(out->xmit_count),
+ &buf[n_eaten]);
+ n_eaten += H5FD__mirror_xmit_decode_uint8(&(out->op), &buf[n_eaten]);
+ HDassert(n_eaten == H5FD_MIRROR_XMIT_HEADER_SIZE);
+ return n_eaten;
+} /* end H5FD_mirror_xmit_decode_header() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_decode_lock
+ *
+ * Purpose: Extract a mirror_xmit_lock_t from the bytes-buffer.
+ *
+ * Fields will be lifted from the buffer and stored in the
+ * target structure, using in the correct location (different
+ * systems may insert different padding between components) and
+ * word order (Big- vs Little-Endian).
+ *
+ * The programmer must ensure that the received buffer holds
+ * at least the expected size of data.
+ *
+ * The resulting structure should be sanity-checked with
+ * H5FD_mirror_xmit_is_lock() before use.
+ *
+ * Return: The number of bytes consumed from the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_decode_lock(H5FD_mirror_xmit_lock_t *out,
+ const unsigned char *buf)
+{
+ size_t n_eaten = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_decode_lock");
+ HDassert(out && buf);
+ n_eaten += H5FD_mirror_xmit_decode_header(&(out->pub), buf);
+ n_eaten += H5FD__mirror_xmit_decode_uint64(&(out->rw), &buf[n_eaten]);
+ HDassert(n_eaten == H5FD_MIRROR_XMIT_LOCK_SIZE);
+ return n_eaten;
+} /* end H5FD_mirror_xmit_decode_lock() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_decode_open
+ *
+ * Purpose: Extract a mirror_xmit_open_t from the bytes-buffer.
+ *
+ * Fields will be lifted from the buffer and stored in the
+ * target structure, using in the correct location (different
+ * systems may insert different padding between components) and
+ * word order (Big- vs Little-Endian).
+ *
+ * The programmer must ensure that the received buffer holds
+ * at least the expected size of data.
+ *
+ * The resulting structure should be sanity-checked with
+ * H5FD_mirror_xmit_is_open() before use.
+ *
+ * Return: The maximum number of bytes that this decoding operation might
+ * have consumed from the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_decode_open(H5FD_mirror_xmit_open_t *out,
+ const unsigned char *buf)
+{
+ size_t n_eaten = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_decode_open");
+ HDassert(out && buf);
+ n_eaten += H5FD_mirror_xmit_decode_header(&(out->pub), buf);
+ n_eaten += H5FD__mirror_xmit_decode_uint32(&(out->flags), &buf[n_eaten]);
+ n_eaten += H5FD__mirror_xmit_decode_uint64(&(out->maxaddr), &buf[n_eaten]);
+ n_eaten += H5FD__mirror_xmit_decode_uint64(&(out->size_t_blob),
+ &buf[n_eaten]);
+ HDassert((H5FD_MIRROR_XMIT_OPEN_SIZE - H5FD_MIRROR_XMIT_FILEPATH_MAX)
+ == n_eaten);
+ HDstrncpy(out->filename, (const char *)&buf[n_eaten],
+ H5FD_MIRROR_XMIT_FILEPATH_MAX-1);
+ out->filename[H5FD_MIRROR_XMIT_FILEPATH_MAX-1] = 0; /* force final NULL */
+ return H5FD_MIRROR_XMIT_OPEN_SIZE;
+} /* end H5FD_mirror_xmit_decode_open() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_decode_reply
+ *
+ * Purpose: Extract a mirror_xmit_reply_t from the bytes-buffer.
+ *
+ * Fields will be lifted from the buffer and stored in the
+ * target structure, using in the correct location (different
+ * systems may insert different padding between components) and
+ * word order (Big- vs Little-Endian).
+ *
+ * The programmer must ensure that the received buffer holds
+ * at least the expected size of data.
+ *
+ * The resulting structure should be sanity-checked with
+ * H5FD_mirror_xmit_is_reply() before use.
+ *
+ * Return: The maximum number of bytes that this decoding operation might
+ * have consumed from the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_decode_reply(H5FD_mirror_xmit_reply_t *out,
+ const unsigned char *buf)
+{
+ size_t n_eaten = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_decode_reply");
+ HDassert(out && buf);
+ n_eaten += H5FD_mirror_xmit_decode_header(&(out->pub), buf);
+ n_eaten += H5FD__mirror_xmit_decode_uint32(&(out->status), &buf[n_eaten]);
+ HDassert((H5FD_MIRROR_XMIT_REPLY_SIZE - H5FD_MIRROR_STATUS_MESSAGE_MAX)
+ == n_eaten);
+ HDstrncpy(out->message, (const char *)&buf[n_eaten],
+ H5FD_MIRROR_STATUS_MESSAGE_MAX-1);
+ out->message[H5FD_MIRROR_STATUS_MESSAGE_MAX-1] = 0; /* force NULL term */
+ return H5FD_MIRROR_XMIT_REPLY_SIZE;
+} /* end H5FD_mirror_xmit_decode_reply() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_decode_set_eoa
+ *
+ * Purpose: Extract a mirror_xmit_eoa_t from the bytes-buffer.
+ *
+ * Fields will be lifted from the buffer and stored in the
+ * target structure, using in the correct location (different
+ * systems may insert different padding between components) and
+ * word order (Big- vs Little-Endian).
+ *
+ * The programmer must ensure that the received buffer holds
+ * at least the expected size of data.
+ *
+ * The resulting structure should be sanity-checked with
+ * H5FD_mirror_xmit_is_set_eoa() before use.
+ *
+ * Return: The number of bytes consumed from the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_decode_set_eoa(H5FD_mirror_xmit_eoa_t *out,
+ const unsigned char *buf)
+{
+ size_t n_eaten = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_decode_set_eoa");
+ HDassert(out && buf);
+ n_eaten += H5FD_mirror_xmit_decode_header(&(out->pub), buf);
+ n_eaten += H5FD__mirror_xmit_decode_uint8(&(out->type), &buf[n_eaten]);
+ n_eaten += H5FD__mirror_xmit_decode_uint64(&(out->eoa_addr), &buf[n_eaten]);
+ HDassert(n_eaten == H5FD_MIRROR_XMIT_EOA_SIZE);
+ return n_eaten;
+} /* end H5FD_mirror_xmit_decode_set_eoa() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_decode_write
+ *
+ * Purpose: Extract a mirror_xmit_write_t from the bytes-buffer.
+ *
+ * Fields will be lifted from the buffer and stored in the
+ * target structure, using in the correct location (different
+ * systems may insert different padding between components) and
+ * word order (Big- vs Little-Endian).
+ *
+ * The programmer must ensure that the received buffer holds
+ * at least the expected size of data.
+ *
+ * The resulting structure should be sanity-checked with
+ * H5FD_mirror_xmit_is_write() before use.
+ *
+ * Return: The number of bytes consumed from the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_decode_write(H5FD_mirror_xmit_write_t *out,
+ const unsigned char *buf)
+{
+ size_t n_eaten = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_decode_write");
+ HDassert(out && buf);
+ n_eaten += H5FD_mirror_xmit_decode_header(&(out->pub), buf);
+ n_eaten += H5FD__mirror_xmit_decode_uint8(&(out->type), &buf[n_eaten]);
+ n_eaten += H5FD__mirror_xmit_decode_uint64(&(out->offset), &buf[n_eaten]);
+ n_eaten += H5FD__mirror_xmit_decode_uint64(&(out->size), &buf[n_eaten]);
+ HDassert(n_eaten == H5FD_MIRROR_XMIT_WRITE_SIZE);
+ return n_eaten;
+} /* end H5FD_mirror_xmit_decode_write() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_encode_header
+ *
+ * Purpose: Encode a mirror_xmit_t "header" to the bytes-buffer.
+ *
+ * Fields will be packed into the buffer in a predictable manner,
+ * any numbers stored in "network" (Big-Endian) word order.
+ *
+ * The programmer must ensure that the destination buffer is
+ * large enough to hold the expected data.
+ *
+ * Return: The number of bytes written to the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_encode_header(unsigned char *dest,
+ const H5FD_mirror_xmit_t *x)
+{
+ size_t n_writ = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_encode_header");
+ HDassert(dest && x);
+ n_writ += H5FD__mirror_xmit_encode_uint32((dest+n_writ), x->magic);
+ n_writ += H5FD__mirror_xmit_encode_uint8((dest+n_writ), x->version);
+ n_writ += H5FD__mirror_xmit_encode_uint32((dest+n_writ), x->session_token);
+ n_writ += H5FD__mirror_xmit_encode_uint32((dest+n_writ), x->xmit_count);
+ n_writ += H5FD__mirror_xmit_encode_uint8((dest+n_writ), x->op);
+ HDassert(n_writ == H5FD_MIRROR_XMIT_HEADER_SIZE);
+ return n_writ;
+} /* end H5FD_mirror_xmit_encode_header() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_encode_lock
+ *
+ * Purpose: Encode a mirror_xmit_lock_t to the bytes-buffer.
+ * Fields will be packed into the buffer in a predictable manner,
+ * any numbers stored in "network" (Big-Endian) word order.
+ *
+ * The programmer must ensure that the destination buffer is
+ * large enough to hold the expected data.
+ *
+ * Return: The number of bytes written to the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_encode_lock(unsigned char *dest,
+ const H5FD_mirror_xmit_lock_t *x)
+{
+ size_t n_writ = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_encode_lock");
+ HDassert(dest && x);
+ n_writ += H5FD_mirror_xmit_encode_header(dest,
+ (const H5FD_mirror_xmit_t *)&(x->pub));
+ n_writ += H5FD__mirror_xmit_encode_uint64(&dest[n_writ], x->rw);
+ HDassert(n_writ == H5FD_MIRROR_XMIT_LOCK_SIZE);
+ return n_writ;
+} /* end H5FD_mirror_xmit_encode_lock() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_encode_open
+ *
+ * Purpose: Encode a mirror_xmit_open_t to the bytes-buffer.
+ * Fields will be packed into the buffer in a predictable manner,
+ * any numbers stored in "network" (Big-Endian) word order.
+ *
+ * The programmer must ensure that the destination buffer is
+ * large enough to hold the expected data.
+ *
+ * Return: The maximum number of bytes that this decoding operation might
+ * have written into the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_encode_open(unsigned char *dest,
+ const H5FD_mirror_xmit_open_t *x)
+{
+ size_t n_writ = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_encode_open");
+ HDassert(dest && x);
+ /* clear entire structure, but especially its filepath string area */
+ for (n_writ = 0; n_writ < H5FD_MIRROR_XMIT_OPEN_SIZE; n_writ++) {
+ *(dest+n_writ) = 0;
+ }
+ n_writ = 0;
+ n_writ += H5FD_mirror_xmit_encode_header(dest,
+ (const H5FD_mirror_xmit_t *)&(x->pub));
+ n_writ += H5FD__mirror_xmit_encode_uint32(&dest[n_writ], x->flags);
+ n_writ += H5FD__mirror_xmit_encode_uint64(&dest[n_writ], x->maxaddr);
+ n_writ += H5FD__mirror_xmit_encode_uint64(&dest[n_writ], x->size_t_blob);
+ HDassert((H5FD_MIRROR_XMIT_OPEN_SIZE - H5FD_MIRROR_XMIT_FILEPATH_MAX)
+ == n_writ);
+ HDstrncpy((char *)&dest[n_writ], x->filename,
+ H5FD_MIRROR_XMIT_FILEPATH_MAX);
+ return H5FD_MIRROR_XMIT_OPEN_SIZE;
+} /* end H5FD_mirror_xmit_encode_open() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_encode_reply
+ *
+ * Purpose: Encode a mirror_xmit_reply_t to the bytes-buffer.
+ *
+ * Fields will be packed into the buffer in a predictable manner,
+ * any numbers stored in "network" (Big-Endian) word order.
+ *
+ * The programmer must ensure that the destination buffer is
+ * large enough to hold the expected data.
+ *
+ * Return: The maximum number of bytes that this decoding operation might
+ * have written into the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_encode_reply(unsigned char *dest,
+ const H5FD_mirror_xmit_reply_t *x)
+{
+ size_t n_writ = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_encode_reply");
+ HDassert(dest && x);
+ /* clear entire structure, but especially its message string area */
+ for (n_writ = 0; n_writ < H5FD_MIRROR_XMIT_REPLY_SIZE; n_writ++) {
+ *(dest+n_writ) = 0;
+ }
+ n_writ = 0;
+ n_writ += H5FD_mirror_xmit_encode_header(dest,
+ (const H5FD_mirror_xmit_t *)&(x->pub));
+ n_writ += H5FD__mirror_xmit_encode_uint32(&dest[n_writ], x->status);
+ HDassert((H5FD_MIRROR_XMIT_REPLY_SIZE - H5FD_MIRROR_STATUS_MESSAGE_MAX)
+ == n_writ);
+ HDstrncpy((char *)&dest[n_writ], x->message,
+ H5FD_MIRROR_STATUS_MESSAGE_MAX);
+ return H5FD_MIRROR_XMIT_REPLY_SIZE;
+} /* end H5FD_mirror_xmit_encode_reply() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_encode_set_eoa
+ *
+ * Purpose: Encode a mirror_xmit_eoa_t to the bytes-buffer.
+ *
+ * Fields will be packed into the buffer in a predictable manner,
+ * any numbers stored in "network" (Big-Endian) word order.
+ *
+ * The programmer must ensure that the destination buffer is
+ * large enough to hold the expected data.
+ *
+ * Return: The number of bytes written to the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_encode_set_eoa(unsigned char *dest,
+ const H5FD_mirror_xmit_eoa_t *x)
+{
+ size_t n_writ = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_encode_set_eoa");
+ HDassert(dest && x);
+ n_writ += H5FD_mirror_xmit_encode_header(dest,
+ (const H5FD_mirror_xmit_t *)&(x->pub));
+ n_writ += H5FD__mirror_xmit_encode_uint8(&dest[n_writ], x->type);
+ n_writ += H5FD__mirror_xmit_encode_uint64(&dest[n_writ], x->eoa_addr);
+ HDassert(n_writ == H5FD_MIRROR_XMIT_EOA_SIZE);
+ return n_writ;
+} /* end H5FD_mirror_xmit_encode_set_eoa() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_encode_write
+ *
+ * Purpose: Encode a mirror_xmit_write_t to the bytes-buffer.
+ *
+ * Fields will be packed into the buffer in a predictable manner,
+ * any numbers stored in "network" (Big-Endian) word order.
+ *
+ * The programmer must ensure that the destination buffer is
+ * large enough to hold the expected data.
+ *
+ * Return: The number of bytes written to the buffer.
+ * ---------------------------------------------------------------------------
+ */
+size_t
+H5FD_mirror_xmit_encode_write(unsigned char *dest,
+ const H5FD_mirror_xmit_write_t *x)
+{
+ size_t n_writ = 0;
+ LOG_OP_CALL("H5FD_mirror_xmit_encode_write");
+ HDassert(dest && x);
+ n_writ += H5FD_mirror_xmit_encode_header(dest,
+ (const H5FD_mirror_xmit_t *)&(x->pub));
+ n_writ += H5FD__mirror_xmit_encode_uint8(&dest[n_writ], x->type);
+ n_writ += H5FD__mirror_xmit_encode_uint64(&dest[n_writ], x->offset);
+ n_writ += H5FD__mirror_xmit_encode_uint64(&dest[n_writ], x->size);
+ HDassert(n_writ == H5FD_MIRROR_XMIT_WRITE_SIZE);
+ return n_writ;
+} /* end H5FD_mirror_xmit_encode_write() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_is_close
+ *
+ * Purpose: Verify that a mirror_xmit_t is a valid CLOSE xmit.
+ *
+ * Checks header validity and op code.
+ *
+ * Return: TRUE if valid; else FALSE.
+ * ---------------------------------------------------------------------------
+ */
+hbool_t
+H5FD_mirror_xmit_is_close(const H5FD_mirror_xmit_t *xmit)
+{
+ LOG_OP_CALL("H5FD_mirror_xmit_is_close");
+ HDassert(xmit);
+ if ( (TRUE == H5FD_mirror_xmit_is_xmit(xmit)) &&
+ (H5FD_MIRROR_OP_CLOSE == xmit->op) )
+ {
+ return TRUE;
+ }
+ return FALSE;
+} /* end H5FD_mirror_xmit_is_close() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_is_lock
+ *
+ * Purpose: Verify that a mirror_xmit_lock_t is a valid LOCK xmit.
+ *
+ * Checks header validity and op code.
+ *
+ * Return: TRUE if valid; else FALSE.
+ * ---------------------------------------------------------------------------
+ */
+hbool_t
+H5FD_mirror_xmit_is_lock(const H5FD_mirror_xmit_lock_t *xmit)
+{
+ LOG_OP_CALL("H5FD_mirror_xmit_is_lock");
+ HDassert(xmit);
+ if ( (TRUE == H5FD_mirror_xmit_is_xmit(&(xmit->pub))) &&
+ (H5FD_MIRROR_OP_LOCK == xmit->pub.op) )
+ {
+ return TRUE;
+ }
+ return FALSE;
+} /* end H5FD_mirror_xmit_is_lock() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_is_open
+ *
+ * Purpose: Verify that a mirror_xmit_open_t is a valid OPEN xmit.
+ *
+ * Checks header validity and op code.
+ *
+ * Return: TRUE if valid; else FALSE.
+ * ---------------------------------------------------------------------------
+ */
+hbool_t
+H5FD_mirror_xmit_is_open(const H5FD_mirror_xmit_open_t *xmit)
+{
+ LOG_OP_CALL("H5FD_mirror_xmit_is_open");
+ HDassert(xmit);
+ if ( (TRUE == H5FD_mirror_xmit_is_xmit(&(xmit->pub))) &&
+ (H5FD_MIRROR_OP_OPEN == xmit->pub.op) )
+ {
+ return TRUE;
+ }
+ return FALSE;
+} /* end H5FD_mirror_xmit_is_open() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_is_eoa
+ *
+ * Purpose: Verify that a mirror_xmit_eoa_t is a valid SET-EOA xmit.
+ *
+ * Checks header validity and op code.
+ *
+ * Return: TRUE if valid; else FALSE.
+ * ---------------------------------------------------------------------------
+ */
+hbool_t
+H5FD_mirror_xmit_is_set_eoa(const H5FD_mirror_xmit_eoa_t *xmit)
+{
+ LOG_OP_CALL("H5FD_mirror_xmit_is_set_eoa");
+ HDassert(xmit);
+ if ( (TRUE == H5FD_mirror_xmit_is_xmit(&(xmit->pub))) &&
+ (H5FD_MIRROR_OP_SET_EOA == xmit->pub.op) )
+ {
+ return TRUE;
+ }
+ return FALSE;
+} /* end H5FD_mirror_xmit_is_eoa() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_is_reply
+ *
+ * Purpose: Verify that a mirror_xmit_reply_t is a valid REPLY xmit.
+ *
+ * Checks header validity and op code.
+ *
+ * Return: TRUE if valid; else FALSE.
+ * ---------------------------------------------------------------------------
+ */
+hbool_t
+H5FD_mirror_xmit_is_reply(const H5FD_mirror_xmit_reply_t *xmit)
+{
+ LOG_OP_CALL("H5FD_mirror_xmit_is_reply");
+ HDassert(xmit);
+ if ( (TRUE == H5FD_mirror_xmit_is_xmit(&(xmit->pub))) &&
+ (H5FD_MIRROR_OP_REPLY == xmit->pub.op) )
+ {
+ return TRUE;
+ }
+ return FALSE;
+} /* end H5FD_mirror_xmit_is_reply() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_is_write
+ *
+ * Purpose: Verify that a mirror_xmit_write_t is a valid WRITE xmit.
+ *
+ * Checks header validity and op code.
+ *
+ * Return: TRUE if valid; else FALSE.
+ * ---------------------------------------------------------------------------
+ */
+hbool_t
+H5FD_mirror_xmit_is_write(const H5FD_mirror_xmit_write_t *xmit)
+{
+ LOG_OP_CALL("H5FD_mirror_xmit_is_write");
+ HDassert(xmit);
+ if ( (TRUE == H5FD_mirror_xmit_is_xmit(&(xmit->pub))) &&
+ (H5FD_MIRROR_OP_WRITE == xmit->pub.op) )
+ {
+ return TRUE;
+ }
+ return FALSE;
+} /* end H5FD_mirror_xmit_is_write() */
+
+
+/* ---------------------------------------------------------------------------
+ * Function: H5FD_mirror_xmit_is_xmit
+ *
+ * Purpose: Verify that a mirror_xmit_t is well-formed.
+ *
+ * Checks magic number and structure version.
+ *
+ * Return: TRUE if valid; else FALSE.
+ * ---------------------------------------------------------------------------
+ */
+hbool_t
+H5FD_mirror_xmit_is_xmit(const H5FD_mirror_xmit_t *xmit)
+{
+ LOG_OP_CALL("H5FD_mirror_xmit_is_xmit");
+ HDassert(xmit);
+ if ( (H5FD_MIRROR_XMIT_MAGIC != xmit->magic) ||
+ (H5FD_MIRROR_XMIT_CURR_VERSION != xmit->version) )
+ {
+ return FALSE;
+ }
+ return TRUE;
+} /* end H5FD_mirror_xmit_is_xmit() */
+
+
+/* ----------------------------------------------------------------------------
+ * Function: H5FD__mirror_verify_reply
+ *
+ * Purpose: Wait for and read reply data from remote processes.
+ * Sanity-check that a reply is well-formed and valid.
+ * If all checks pass, inspect the reply contents and handle
+ * reported error, if not an OK reply.
+ *
+ * Return: SUCCEED if ok, else FAIL.
+ * ----------------------------------------------------------------------------
+ */
+herr_t
+H5FD__mirror_verify_reply(H5FD_mirror_t *file)
+{
+ char xmit_buf[H5FD_MIRROR_XMIT_REPLY_SIZE];
+ struct H5FD_mirror_xmit_reply_t reply;
+ ssize_t read_ret = 0;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_NOAPI_NOINIT;
+
+ LOG_OP_CALL("H5FD__mirror_verify_reply");
+
+ HDassert(file && file->sock_fd);
+
+ read_ret = HDread(file->sock_fd, xmit_buf, H5FD_MIRROR_XMIT_REPLY_SIZE);
+ if (read_ret < 0) {
+ HGOTO_ERROR(H5E_VFL, H5E_READERROR, FAIL, "unable to read reply");
+ }
+ if (read_ret != H5FD_MIRROR_XMIT_REPLY_SIZE) {
+ HGOTO_ERROR(H5E_VFL, H5E_READERROR, FAIL, "unexpected read size");
+ }
+
+ LOG_XMIT_BYTES("reply", xmit_buf, read_ret);
+
+ if (H5FD_mirror_xmit_decode_reply(&reply, (const unsigned char *)xmit_buf)
+ != H5FD_MIRROR_XMIT_REPLY_SIZE)
+ {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "unable to decode reply xmit");
+ }
+
+ if (H5FD_mirror_xmit_is_reply(&reply) != TRUE) {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "xmit op code was not REPLY");
+ }
+
+ if (reply.pub.session_token != file->xmit.session_token) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "wrong session");
+ }
+
+ if (reply.pub.xmit_count != (file->xmit_i)++) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "xmit out of sync");
+ }
+
+ if (reply.status != H5FD_MIRROR_STATUS_OK) {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL,
+ "%s", (const char *)(reply.message));
+ }
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value);
+} /* end H5FD__mirror_verify_reply() */
+
+
+/* -------------------------------------------------------------------------
+ * Function: H5FD_mirror_fapl_get
+ *
+ * Purpose: Get the file access propety list which could be used to create
+ * an identical file.
+ *
+ * Return: Success: pointer to the new file access property list value.
+ * Failure: NULL
+ * -------------------------------------------------------------------------
+ */
+static void *
+H5FD_mirror_fapl_get(H5FD_t *_file)
+{
+ H5FD_mirror_t *file = (H5FD_mirror_t *)_file;
+ H5FD_mirror_fapl_t *fa = NULL;
+ void *ret_value = NULL;
+
+ FUNC_ENTER_NOAPI_NOINIT
+
+ LOG_OP_CALL("H5FD_mirror_fapl_get");
+
+ fa = (H5FD_mirror_fapl_t *)H5MM_calloc(sizeof(H5FD_mirror_fapl_t));
+ if (NULL == fa) {
+ HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "calloc failed");
+ }
+
+ HDmemcpy(fa, &(file->fa), sizeof(H5FD_mirror_fapl_t));
+
+ ret_value = fa;
+
+done:
+ if (ret_value == NULL) {
+ if (fa != NULL) {
+ H5MM_xfree(fa);
+ }
+ }
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD_mirror_fapl_get() */
+
+
+/* -------------------------------------------------------------------------
+ * Function: H5FD_mirror_fapl_copy
+ *
+ * Purpose: Copies the mirror vfd-specific file access properties.
+ *
+ * Return: Success: Pointer to a new property list
+ * Failure: NULL
+ * -------------------------------------------------------------------------
+ */
+static void *
+H5FD_mirror_fapl_copy(const void *_old_fa)
+{
+ const H5FD_mirror_fapl_t *old_fa = (const H5FD_mirror_fapl_t *)_old_fa;
+ H5FD_mirror_fapl_t *new_fa = NULL;
+ void *ret_value = NULL;
+
+ FUNC_ENTER_NOAPI_NOINIT
+
+ LOG_OP_CALL("H5FD_mirror_fapl_copy");
+
+ new_fa = (H5FD_mirror_fapl_t *)H5MM_malloc(sizeof(H5FD_mirror_fapl_t));
+ if (new_fa == NULL) {
+ HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL,
+ "memory allocation failed");
+ }
+
+ HDmemcpy(new_fa, old_fa, sizeof(H5FD_mirror_fapl_t));
+ ret_value = new_fa;
+
+done:
+ if (ret_value == NULL) {
+ if (new_fa != NULL) {
+ H5MM_xfree(new_fa);
+ }
+ }
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD_mirror_fapl_copy() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_fapl_free
+ *
+ * Purpose: Frees the mirror VFD-specific file access properties.
+ *
+ * Return: SUCCEED (cannot fail)
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_mirror_fapl_free(void *_fa)
+{
+ H5FD_mirror_fapl_t *fa = (H5FD_mirror_fapl_t*)_fa;
+
+ FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+ LOG_OP_CALL("H5FD_mirror_fapl_free");
+
+ /* sanity check */
+ HDassert(fa != NULL);
+ HDassert(fa->magic == H5FD_MIRROR_FAPL_MAGIC);
+
+ fa->magic += 1; /* invalidate */
+ H5MM_xfree(fa);
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5FD_mirror_fapl_free() */
+
+
+/* -------------------------------------------------------------------------
+ * Function: H5Pget_fapl_mirror
+ *
+ * Purpose: Get the configuration information for this fapl.
+ * Data is memcopied into the fa_out pointer.
+ *
+ * Return: SUCCEED/FAIL
+ * -------------------------------------------------------------------------
+ */
+herr_t
+H5Pget_fapl_mirror(hid_t fapl_id, H5FD_mirror_fapl_t *fa_out)
+{
+ const H5FD_mirror_fapl_t *fa = NULL;
+ H5P_genplist_t *plist = NULL;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_API(FAIL)
+ H5TRACE2("e", "i*x", fapl_id, fa_out);
+
+ LOG_OP_CALL("H5Pget_fapl_mirror");
+
+ if (NULL == fa_out) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "fa_out is NULL");
+ }
+
+ plist = H5P_object_verify(fapl_id, H5P_FILE_ACCESS);
+ if (NULL == plist) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL,
+ "not a file access property list");
+ }
+
+ if (H5P_peek_driver(plist) != H5FD_MIRROR) {
+ HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "incorrect VFL driver");
+ }
+
+ fa = (const H5FD_mirror_fapl_t *)H5P_peek_driver_info(plist);
+ if (NULL == fa) {
+ HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "bad VFL driver info");
+ }
+
+ HDassert(fa->magic == H5FD_MIRROR_FAPL_MAGIC); /* sanity check */
+
+ HDmemcpy(fa_out, fa, sizeof(H5FD_mirror_fapl_t));
+
+done:
+ FUNC_LEAVE_API(ret_value);
+} /* end H5Pget_fapl_mirror() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5Pset_fapl_mirror
+ *
+ * Purpose: Modify the file access property list to use the mirror
+ * driver (H5FD_MIRROR) defined in this source file.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Pset_fapl_mirror(hid_t fapl_id, H5FD_mirror_fapl_t *fa)
+{
+ H5P_genplist_t *plist = NULL;
+ herr_t ret_value = FAIL;
+
+ FUNC_ENTER_API(FAIL)
+ H5TRACE2("e", "i*x", fapl_id, fa);
+
+ LOG_OP_CALL("H5Pset_fapl_mirror");
+
+ plist = H5P_object_verify(fapl_id, H5P_FILE_ACCESS);
+ if (NULL == plist) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL,
+ "not a file access property list");
+ }
+ if (NULL == fa) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "null fapl_t pointer");
+ }
+ if (H5FD_MIRROR_FAPL_MAGIC != fa->magic) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid fapl_t magic");
+ }
+ if (H5FD_MIRROR_CURR_FAPL_T_VERSION != fa->version) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unknown fapl_t version");
+ }
+
+ ret_value = H5P_set_driver(plist, H5FD_MIRROR, (const void *)fa);
+
+done:
+ FUNC_LEAVE_API(ret_value)
+} /* end H5Pset_fapl_mirror() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_open
+ *
+ * Purpose: Create and/or opens a file as an HDF5 file.
+ *
+ * Initiate connection with remote Server/Writer.
+ * If successful, the remote file is open.
+ *
+ * Return: Success: A pointer to a new file data structure. The
+ * public fields will be initialized by the
+ * caller, which is always H5FD_open().
+ * Failure: NULL
+ *-------------------------------------------------------------------------
+ */
+static H5FD_t *
+H5FD_mirror_open(const char *name,
+ unsigned flags,
+ hid_t fapl_id,
+ haddr_t maxaddr)
+{
+#define MIRR_OPEN_MAXBUF 16 /* local symbol to give meaning to magic number */
+ /* #defined because it is needed at compile time */
+ /* Large enough to hold a port number string */
+ int live_socket = -1;
+ struct sockaddr_in target_addr;
+ socklen_t addr_size;
+ char xmit_buf[H5FD_MIRROR_XMIT_OPEN_SIZE];
+ H5FD_mirror_fapl_t fa;
+ H5FD_mirror_t *file = NULL;
+ H5FD_mirror_xmit_open_t open_xmit;
+ H5FD_t *ret_value = NULL;
+
+ FUNC_ENTER_NOAPI_NOINIT
+
+ LOG_OP_CALL("H5FD_mirror_open");
+
+ /* --------------- */
+ /* Check arguments */
+ /* --------------- */
+
+ if (!name || !*name) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid file name");
+ }
+ if (HDstrlen(name) >= H5FD_MIRROR_XMIT_FILEPATH_MAX) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "filename is too long");
+ }
+ if (0 == maxaddr || HADDR_UNDEF == maxaddr) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr");
+ }
+ if (ADDR_OVERFLOW(maxaddr)) {
+ HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, NULL, "bogus maxaddr");
+ }
+
+ if (H5Pget_fapl_mirror(fapl_id, &fa) == FAIL) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "can't get config info");
+ }
+
+ if (H5FD_MIRROR_FAPL_MAGIC != fa.magic) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid fapl magic");
+ }
+
+ if (H5FD_MIRROR_CURR_FAPL_T_VERSION != fa.version) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid fapl version");
+ }
+
+ /* --------------------- */
+ /* Handshake with remote */
+ /* --------------------- */
+
+ live_socket = HDsocket(AF_INET, SOCK_STREAM, 0);
+ if (live_socket < 0) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "can't create socket");
+ }
+
+ target_addr.sin_family = AF_INET;
+ target_addr.sin_port = HDhtons((uint16_t)fa.handshake_port);
+ target_addr.sin_addr.s_addr = HDinet_addr(fa.remote_ip);
+ HDmemset(target_addr.sin_zero, '\0', sizeof target_addr.sin_zero);
+
+ addr_size = sizeof(target_addr);
+ if (HDconnect(live_socket, (struct sockaddr *)&target_addr, addr_size) < 0)
+ {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL,
+ "can't connect to remote server");
+ }
+
+ /* ------------- */
+ /* Open the file */
+ /* ------------- */
+
+ file = (H5FD_mirror_t *)H5FL_CALLOC(H5FD_mirror_t);
+ if (NULL == file) {
+ HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL,
+ "unable to allocate file struct");
+ }
+
+ file->sock_fd = live_socket;
+ file->xmit_i = 0;
+
+ file->xmit.magic = H5FD_MIRROR_XMIT_MAGIC;
+ file->xmit.version = H5FD_MIRROR_XMIT_CURR_VERSION;
+ file->xmit.xmit_count = file->xmit_i++;
+ file->xmit.session_token = (uint32_t)(0x01020304 ^ file->sock_fd); /* TODO: hashing? */
+ /* int --> uint32_t may truncate on some systems... shouldn't matter? */
+
+ file->xmit.op = H5FD_MIRROR_OP_OPEN;
+ open_xmit.pub = file->xmit;
+ open_xmit.flags = (uint32_t)flags;
+ open_xmit.maxaddr = (uint64_t)maxaddr;
+ open_xmit.size_t_blob = (uint64_t)((size_t)(-1));
+ HDsnprintf(open_xmit.filename, H5FD_MIRROR_XMIT_FILEPATH_MAX-1, "%s", name);
+
+ if (H5FD_mirror_xmit_encode_open((unsigned char *)xmit_buf,
+ (const H5FD_mirror_xmit_open_t *)&open_xmit)
+ != H5FD_MIRROR_XMIT_OPEN_SIZE)
+ {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, NULL, "unable to encode open");
+ }
+
+ LOG_XMIT_BYTES("open", xmit_buf, H5FD_MIRROR_XMIT_OPEN_SIZE);
+
+ if (HDwrite(file->sock_fd, xmit_buf, H5FD_MIRROR_XMIT_OPEN_SIZE) < 0) {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, NULL, "unable to transmit open");
+ }
+
+ if (H5FD__mirror_verify_reply(file) == FAIL) {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, NULL, "invalid reply");
+ }
+
+ ret_value = (H5FD_t *)file;
+
+done:
+ if (NULL == ret_value) {
+ if (file) {
+ file = H5FL_FREE(H5FD_mirror_t, file);
+ }
+ if (live_socket >= 0 && HDclose(live_socket) < 0) {
+ HDONE_ERROR(H5E_VFL, H5E_CANTCLOSEFILE, NULL,
+ "can't close socket");
+ }
+ }
+ FUNC_LEAVE_NOAPI(ret_value)
+#undef MIRR_OPEN_MAXBUF
+} /* end H5FD_mirror_open() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_close
+ *
+ * Purpose: Closes the HDF5 file.
+ *
+ * Tries to send a CLOSE op to the remote Writer and expects
+ * a valid reply, then closes the socket.
+ * In error, attempts to send a deliberately invalid xmit to the
+ * Writer to get it to close/abort, then attempts to close the
+ * socket.
+ *
+ * Return: Success: SUCCEED
+ * Failure: FAIL, file possibly not closed but resources freed.
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_mirror_close(H5FD_t *_file)
+{
+ H5FD_mirror_t *file = (H5FD_mirror_t *)_file;
+ unsigned char xmit_buf[H5FD_MIRROR_XMIT_HEADER_SIZE];
+ int xmit_encoded = 0; /* monitor point of failure */
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_NOAPI_NOINIT
+
+ LOG_OP_CALL("H5FD_mirror_close");
+
+ /* Sanity check */
+ HDassert(file);
+ HDassert(file->sock_fd >= 0);
+
+ file->xmit.xmit_count = (file->xmit_i)++;
+ file->xmit.op = H5FD_MIRROR_OP_CLOSE;
+
+ if (H5FD_mirror_xmit_encode_header(xmit_buf,
+ (const H5FD_mirror_xmit_t *)&(file->xmit))
+ != H5FD_MIRROR_XMIT_HEADER_SIZE)
+ {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to encode close");
+ }
+ xmit_encoded = 1;
+
+ LOG_XMIT_BYTES("close", xmit_buf, H5FD_MIRROR_XMIT_HEADER_SIZE);
+
+ if (HDwrite(file->sock_fd, xmit_buf, H5FD_MIRROR_XMIT_HEADER_SIZE) < 0) {
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to transmit close");
+ }
+
+ if (H5FD__mirror_verify_reply(file) == FAIL) {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "invalid reply");
+ }
+
+ if (HDclose(file->sock_fd) < 0) {
+ HGOTO_ERROR(H5E_VFL, H5E_CANTCLOSEFILE, FAIL, "can't close socket");
+ }
+
+done:
+ if (ret_value == FAIL) {
+ if (xmit_encoded == 0) {
+ /* Encode failed; send GOODBYE to force writer halt.
+ * We can ignore any response from the writer, if we receive
+ * any reply at all.
+ */
+ if (HDwrite(file->sock_fd, "GOODBYE", HDstrlen("GOODBYE")) < 0) {
+ HDONE_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL,
+ "unable to transmit close");
+ if (HDclose(file->sock_fd) < 0) {
+ HDONE_ERROR(H5E_VFL, H5E_CANTCLOSEFILE, FAIL,
+ "can't close socket");
+ }
+ file->sock_fd = -1; /* invalidate for later */
+ } /* end if problem writing goodbye; go down hard */
+ else
+ if (HDshutdown(file->sock_fd, SHUT_WR) < 0) {
+ HDONE_ERROR(H5E_VFL, H5E_BADVALUE, FAIL,
+ "can't shutdown socket write: %s",
+ HDstrerror(errno));
+ } /* end else-if problem shutting down socket */
+ } /* end if xmit encode failed */
+
+ if (file->sock_fd >= 0) {
+ if (HDclose(file->sock_fd) < 0) {
+ HDONE_ERROR(H5E_VFL, H5E_CANTCLOSEFILE, FAIL,
+ "can't close socket");
+ }
+ } /* end if socket not closed by going down hard */
+ } /* end if error */
+
+ file = H5FL_FREE(H5FD_mirror_t, file); /* always release resources */
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD_mirror_close() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_query
+ *
+ * Purpose: Get the driver feature flags implemented by the driver.
+ *
+ * Return: SUCCEED (non-negative) (can't fail)
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_mirror_query(const H5FD_t H5_ATTR_UNUSED *_file, unsigned long *flags)
+{
+ FUNC_ENTER_NOAPI_NOINIT_NOERR;
+
+ LOG_OP_CALL("H5FD_mirror_query");
+
+ /* Notice: the Mirror VFD Writer currently uses only the Sec2 driver as
+ * the underying driver -- as such, the Mirror VFD implementation copies
+ * the Sec2 feature flags as its own.
+ *
+ * File pointer is always NULL/unused -- the H5FD_FEAT_IGNORE_DRVRINFO flag
+ * is never included.
+ * -- JOS 2020-01-13
+ */
+ if (flags) {
+ *flags = 0 \
+ | H5FD_FEAT_AGGREGATE_METADATA \
+ | H5FD_FEAT_ACCUMULATE_METADATA \
+ | H5FD_FEAT_DATA_SIEVE \
+ | H5FD_FEAT_AGGREGATE_SMALLDATA \
+ | H5FD_FEAT_POSIX_COMPAT_HANDLE \
+ | H5FD_FEAT_SUPPORTS_SWMR_IO \
+ | H5FD_FEAT_DEFAULT_VFD_COMPATIBLE;
+ }
+
+ FUNC_LEAVE_NOAPI(SUCCEED);
+} /* end H5FD_mirror_query() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_get_eoa
+ *
+ * Purpose: Gets the end-of-address marker for the file. The EOA marker
+ * is the first address past the last byte allocated in the
+ * format address space.
+ *
+ * Required to register the driver.
+ *
+ * Return: The end-of-address marker.
+ *-------------------------------------------------------------------------
+ */
+static haddr_t
+H5FD_mirror_get_eoa(const H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type)
+{
+ const H5FD_mirror_t *file = (const H5FD_mirror_t *)_file;
+
+ FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+ LOG_OP_CALL("H5FD_mirror_get_eoa");
+
+ HDassert(file);
+
+ FUNC_LEAVE_NOAPI(file->eoa)
+} /* end H5FD_mirror_get_eoa() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_set_eoa
+ *
+ * Purpose: Set the end-of-address marker for the file. This function is
+ * called shortly after an existing HDF5 file is opened in order
+ * to tell the driver where the end of the HDF5 data is located.
+ *
+ * Return: SUCCEED / FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_mirror_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr)
+{
+ H5FD_mirror_xmit_eoa_t xmit_eoa;
+ unsigned char xmit_buf[H5FD_MIRROR_XMIT_EOA_SIZE];
+ H5FD_mirror_t *file = (H5FD_mirror_t *)_file;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_NOAPI_NOINIT
+
+ LOG_OP_CALL("H5FD_mirror_set_eoa");
+
+ HDassert(file);
+
+ file->eoa = addr; /* local copy */
+
+ file->xmit.xmit_count = (file->xmit_i)++;
+ file->xmit.op = H5FD_MIRROR_OP_SET_EOA;
+
+ xmit_eoa.pub = file->xmit;
+ xmit_eoa.type = (uint8_t)type;
+ xmit_eoa.eoa_addr = (uint64_t)addr;
+
+ if (H5FD_mirror_xmit_encode_set_eoa(xmit_buf,
+ (const H5FD_mirror_xmit_eoa_t *)&xmit_eoa)
+ != H5FD_MIRROR_XMIT_EOA_SIZE)
+ {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "unable to encode set-eoa");
+ }
+
+ LOG_XMIT_BYTES("set-eoa", xmit_buf, H5FD_MIRROR_XMIT_EOA_SIZE);
+
+ if (HDwrite(file->sock_fd, xmit_buf, H5FD_MIRROR_XMIT_EOA_SIZE) < 0) {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL,
+ "unable to transmit set-eoa");
+ }
+
+ if (H5FD__mirror_verify_reply(file) == FAIL) {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "invalid reply");
+ }
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD_mirror_set_eoa() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_get_eof
+ *
+ * Purpose: Returns the end-of-file marker, which is the greater of
+ * either the filesystem end-of-file or the HDF5 end-of-address
+ * markers.
+ *
+ * Required to register the driver.
+ *
+ * Return: End of file address, the first address past the end of the
+ * "file", either the filesystem file or the HDF5 file.
+ *-------------------------------------------------------------------------
+ */
+static haddr_t
+H5FD_mirror_get_eof(const H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type)
+{
+ const H5FD_mirror_t *file = (const H5FD_mirror_t *)_file;
+
+ FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+ LOG_OP_CALL("H5FD_mirror_get_eof");
+
+ HDassert(file);
+
+ FUNC_LEAVE_NOAPI(file->eof)
+} /* end H5FD_mirror_get_eof() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_read
+ *
+ * Purpose: Required to register the driver.
+ * If called, MUST fail.
+ *
+ * Return: FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_mirror_read(H5FD_t H5_ATTR_UNUSED *_file,
+ H5FD_mem_t H5_ATTR_UNUSED type,
+ hid_t H5_ATTR_UNUSED fapl_id,
+ haddr_t H5_ATTR_UNUSED addr,
+ size_t H5_ATTR_UNUSED size,
+ void H5_ATTR_UNUSED *buf)
+{
+ herr_t ret_value = FAIL;
+
+ FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+ LOG_OP_CALL("H5FD_mirror_read");
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD_mirror_read() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_write
+ *
+ * Purpose: Writes SIZE bytes of data to FILE beginning at address ADDR
+ * from buffer BUF according to data transfer properties in
+ * DXPL_ID.
+ *
+ * Send metadata regarding the write (location, size) to the
+ * remote Writer, then separately transmits the data.
+ * Both transmission expect an OK reply from the Writer.
+ * This two-exchange approach incurs significant overhead,
+ * but is a simple and modular approach.
+ * Start optimizations here.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_mirror_write(H5FD_t *_file,
+ H5FD_mem_t type,
+ hid_t H5_ATTR_UNUSED dxpl_id,
+ haddr_t addr,
+ size_t size,
+ const void *buf)
+{
+ H5FD_mirror_xmit_write_t xmit_write;
+ unsigned char xmit_buf[H5FD_MIRROR_XMIT_WRITE_SIZE];
+ H5FD_mirror_t *file = (H5FD_mirror_t *)_file;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_NOAPI_NOINIT
+
+ LOG_OP_CALL("H5FD_mirror_write");
+
+ HDassert(file);
+ HDassert(buf);
+
+ file->xmit.xmit_count = (file->xmit_i)++;
+ file->xmit.op = H5FD_MIRROR_OP_WRITE;
+
+ xmit_write.pub = file->xmit;
+ xmit_write.size = (uint64_t)size;
+ xmit_write.offset = (uint64_t)addr;
+ xmit_write.type = (uint8_t)type;
+
+
+ /* Notify Writer of incoming data to write. */
+ if (H5FD_mirror_xmit_encode_write(xmit_buf,
+ (const H5FD_mirror_xmit_write_t *)&xmit_write)
+ != H5FD_MIRROR_XMIT_WRITE_SIZE)
+ {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "unable to encode write");
+ }
+
+ LOG_XMIT_BYTES("write", xmit_buf, H5FD_MIRROR_XMIT_WRITE_SIZE);
+
+ if (HDwrite(file->sock_fd, xmit_buf, H5FD_MIRROR_XMIT_WRITE_SIZE) < 0) {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "unable to transmit write");
+ }
+
+ /* Check that our write xmission was received */
+ if (H5FD__mirror_verify_reply(file) == FAIL) {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "invalid reply");
+ }
+
+ /* Send the data to be written */
+ if (HDwrite(file->sock_fd, buf, size) < 0) {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "unable to transmit data");
+ }
+
+ /* Writer should reply that it got the data and is still okay/ready */
+ if (H5FD__mirror_verify_reply(file) == FAIL) {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "invalid reply");
+ }
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD_mirror_write() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_truncate
+ *
+ * Purpose: Makes sure that the true file size is the same (or larger)
+ * than the end-of-address.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_mirror_truncate(H5FD_t *_file,
+ hid_t H5_ATTR_UNUSED dxpl_id,
+ hbool_t H5_ATTR_UNUSED closing)
+{
+ unsigned char xmit_buf[H5FD_MIRROR_XMIT_HEADER_SIZE];
+ H5FD_mirror_t *file = (H5FD_mirror_t *)_file;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_NOAPI_NOINIT
+
+ LOG_OP_CALL("H5FD_mirror_truncate");
+
+ file->xmit.xmit_count = (file->xmit_i)++;
+ file->xmit.op = H5FD_MIRROR_OP_TRUNCATE;
+
+ if (H5FD_mirror_xmit_encode_header(xmit_buf, &(file->xmit))
+ != H5FD_MIRROR_XMIT_HEADER_SIZE)
+ {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "unable to encode truncate");
+ }
+
+ LOG_XMIT_BYTES("truncate", xmit_buf, H5FD_MIRROR_XMIT_HEADER_SIZE);
+
+ if (HDwrite(file->sock_fd, xmit_buf, H5FD_MIRROR_XMIT_HEADER_SIZE) < 0) {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL,
+ "unable to transmit truncate");
+ }
+
+ if (H5FD__mirror_verify_reply(file) == FAIL) {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "invalid reply");
+ }
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD_mirror_truncate() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_lock
+ *
+ * Purpose: To place an advisory lock on a file.
+ * The lock type to apply depends on the parameter "rw":
+ * TRUE--opens for write: an exclusive lock
+ * FALSE--opens for read: a shared lock
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_mirror_lock(H5FD_t *_file, hbool_t rw)
+{
+ H5FD_mirror_xmit_lock_t xmit_lock;
+ unsigned char xmit_buf[H5FD_MIRROR_XMIT_LOCK_SIZE];
+ H5FD_mirror_t *file = (H5FD_mirror_t *)_file;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_NOAPI_NOINIT;
+
+ LOG_OP_CALL("H5FD_mirror_lock");
+
+ file->xmit.xmit_count = (file->xmit_i)++;
+ file->xmit.op = H5FD_MIRROR_OP_LOCK;
+
+ xmit_lock.pub = file->xmit;
+ xmit_lock.rw = (uint64_t)rw;
+
+ if (H5FD_mirror_xmit_encode_lock(xmit_buf,
+ (const H5FD_mirror_xmit_lock_t *)&xmit_lock)
+ != H5FD_MIRROR_XMIT_LOCK_SIZE)
+ {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "unable to encode lock");
+ }
+
+ LOG_XMIT_BYTES("lock", xmit_buf, H5FD_MIRROR_XMIT_LOCK_SIZE);
+
+ if (HDwrite(file->sock_fd, xmit_buf, H5FD_MIRROR_XMIT_LOCK_SIZE) < 0) {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "unable to transmit lock");
+ }
+
+ if (H5FD__mirror_verify_reply(file) == FAIL) {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "invalid reply");
+ }
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value);
+} /* end H5FD_mirror_lock */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_mirror_unlock
+ *
+ * Purpose: Remove the existing lock on the file.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_mirror_unlock(H5FD_t *_file)
+{
+ unsigned char xmit_buf[H5FD_MIRROR_XMIT_HEADER_SIZE];
+ H5FD_mirror_t *file = (H5FD_mirror_t *)_file;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_NOAPI_NOINIT;
+
+ LOG_OP_CALL("H5FD_mirror_unlock");
+
+ file->xmit.xmit_count = (file->xmit_i)++;
+ file->xmit.op = H5FD_MIRROR_OP_UNLOCK;
+
+ if (H5FD_mirror_xmit_encode_header(xmit_buf, &(file->xmit))
+ != H5FD_MIRROR_XMIT_HEADER_SIZE)
+ {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "unable to encode unlock");
+ }
+
+ LOG_XMIT_BYTES("unlock", xmit_buf, H5FD_MIRROR_XMIT_HEADER_SIZE);
+
+ if (HDwrite(file->sock_fd, xmit_buf, H5FD_MIRROR_XMIT_HEADER_SIZE) < 0) {
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "unable to transmit unlock");
+ }
+
+ if (H5FD__mirror_verify_reply(file) == FAIL) {
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "invalid reply");
+ }
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value);
+} /* end H5FD_mirror_unlock */
+
+#endif /* H5_HAVE_MIRROR_VFD */
+