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fis-gtm/sr_unix/mupip_restore.c

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/****************************************************************
* *
* Copyright 2001, 2012 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gtm_fcntl.h"
#include "gtm_unistd.h"
#include "gtm_socket.h"
#include "gtm_inet.h"
#include "gtm_stdio.h"
#include "gtm_string.h"
#include <sys/wait.h>
#include <stddef.h>
#include <errno.h>
#ifdef __MVS__
#include <sys/time.h>
#include "gtm_zos_io.h"
#endif
#include "gdsroot.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsfhead.h"
#include "mupipbckup.h"
#include "murest.h"
#include "filestruct.h"
#include "gdsblk.h"
#include "gdsbml.h"
#include "cli.h"
#include "iosp.h"
#include "copy.h"
#include "iob.h"
#include "error.h"
#include "gtmio.h"
#include "iotimer.h"
#include "iotcpdef.h"
#include "iotcproutine.h"
#include "gtm_pipe.h"
#include "gt_timer.h"
#include "stp_parms.h"
#include "gtm_stat.h"
#include "eintr_wrappers.h"
#include "util.h"
#include "gtm_caseconv.h"
#include "io.h"
#include "is_proc_alive.h"
#include "mu_rndwn_file.h"
#include "mupip_exit.h"
#include "mu_outofband_setup.h"
#include "mu_gv_cur_reg_init.h"
#include "mupip_restore.h"
#include "gtmmsg.h"
#include "wcs_sleep.h"
#include "db_ipcs_reset.h"
#include "gds_blk_downgrade.h"
#include "shmpool.h"
#include "min_max.h"
#include "gtmxc_types.h"
#include "gtmcrypt.h"
#include "jnl.h"
#include "anticipatory_freeze.h"
GBLDEF inc_list_struct in_files;
GBLREF uint4 pipe_child;
GBLREF tcp_library_struct tcp_routines;
GBLREF gd_region *gv_cur_region;
GBLREF uint4 restore_read_errno;
LITREF char *gtm_dbversion_table[];
error_def(ERR_BADTAG);
error_def(ERR_IOEOF);
error_def(ERR_MUPCLIERR);
error_def(ERR_MUPRESTERR);
error_def(ERR_TEXT);
#define COMMON_READ(S, BUFF, LEN, INBUF) \
{ \
assert(BACKUP_TEMPFILE_BUFF_SIZE >= LEN); \
(*common_read)(S, BUFF, LEN); \
if (0 != restore_read_errno) \
CLNUP_AND_EXIT(ERR_MUPRESTERR, INBUF); \
}
#define CLNUP_AND_EXIT(EXIT_STATUS, INBUF) \
{ \
if (INBUF) \
free(INBUF); \
assert(FILE_INFO(gv_cur_region)->grabbed_access_sem); \
db_ipcs_reset(gv_cur_region); \
mu_gv_cur_reg_free(); \
mupip_exit(EXIT_STATUS); \
}
CONDITION_HANDLER(iob_io_error)
{
int dummy1, dummy2;
char s[80];
char *fgets_res;
START_CH;
if (SIGNAL == ERR_IOEOF)
{
PRINTF("End of media reached, please mount next volume and press Enter: ");
FGETS(s, 79, stdin, fgets_res);
util_out_print(0, 2, 0); /* clear error message */
CONTINUE;
}
PRN_ERROR;
UNWIND(dummy1, dummy2);
}
void mupip_restore(void)
{
static readonly char label[] = GDS_LABEL;
char db_name[MAX_FN_LEN + 1], *inbuf = NULL, *p, *blk_ptr;
inc_list_struct *ptr;
inc_header inhead;
sgmnt_data old_data;
short iosb[4];
unsigned short n_len;
int4 status, rsize, size, temp, save_errno, old_start_vbn;
uint4 rest_blks, totblks;
trans_num curr_tn;
uint4 ii;
block_id blk_num;
boolean_t extend, truncate;
uint4 cli_status;
BFILE *in;
int i, db_fd;
uint4 old_blk_size, old_tot_blks, bplmap, old_bit_maps, new_bit_maps;
off_t new_eof, offset;
# ifdef GTM_TRUNCATE
off_t new_size;
# endif
char buff[DISK_BLOCK_SIZE];
char msg_buffer[1024], *newmap, *newmap_bptr;
mstr msg_string;
char addr[SA_MAXLEN+1];
unsigned char tcp[5];
backup_type type;
unsigned short port;
int4 timeout, cut, match;
char debug_info[256];
void (*common_read)();
char *errptr;
pid_t waitpid_res;
muinc_blk_hdr_ptr_t sblkh_p;
int rc;
# ifdef GTM_CRYPT
char bkup_hash[GTMCRYPT_HASH_LEN];
int req_dec_blk_size, crypt_status;
gtmcrypt_key_t bkup_key_handle, target_key_handle;
boolean_t is_bkup_file_encrypted, is_same_hash = FALSE;
# endif
ZOS_ONLY(int realfiletag;)
DEBUG_ONLY(unix_db_info *udi;)
extend = TRUE;
if (CLI_NEGATED == (cli_status = cli_present("EXTEND")))
extend = FALSE;
truncate = FALSE;
GTM_TRUNCATE_ONLY(truncate = TRUE;)
mu_outofband_setup();
mu_gv_cur_reg_init();
n_len = SIZEOF(db_name);
if (cli_get_str("DATABASE", db_name, &n_len) == FALSE)
mupip_exit(ERR_MUPCLIERR);
strcpy((char *)gv_cur_region->dyn.addr->fname, db_name);
gv_cur_region->dyn.addr->fname_len = n_len;
if (!STANDALONE(gv_cur_region))
{
util_out_print("Error securing stand alone access to output file !AD. Aborting restore.", TRUE, n_len, db_name);
mupip_exit(ERR_MUPRESTERR);
}
DEBUG_ONLY(udi = FILE_INFO(gv_cur_region));
OPENFILE(db_name, O_RDWR, db_fd);
if (FD_INVALID == db_fd)
{
save_errno = errno;
util_out_print("Error accessing output file !AD. Aborting restore.", TRUE, n_len, db_name);
errptr = (char *)STRERROR(save_errno);
util_out_print("open : !AZ", TRUE, errptr);
CLNUP_AND_EXIT(save_errno, NULL);
}
# ifdef __MVS__
if (-1 == gtm_zos_tag_to_policy(db_fd, TAG_BINARY, &realfiletag))
TAG_POLICY_GTM_PUTMSG(db_name, realfiletag, TAG_BINARY, errno);
# endif
murgetlst();
LSEEKREAD(db_fd, 0, &old_data, SIZEOF(sgmnt_data), save_errno);
if (0 != save_errno)
{
util_out_print("Error accessing output file !AD. Aborting restore.", TRUE, n_len, db_name);
if (-1 != save_errno)
{
errptr = (char *)STRERROR(save_errno);
util_out_print("read : !AZ", TRUE, errptr);
CLNUP_AND_EXIT(save_errno, NULL);
} else
CLNUP_AND_EXIT(ERR_IOEOF, NULL);
}
if (memcmp(old_data.label, label, GDS_LABEL_SZ))
{
util_out_print("Output file !AD has an unrecognizable format", TRUE, n_len, db_name);
CLNUP_AND_EXIT(ERR_MUPRESTERR, NULL);
}
CHECK_DB_ENDIAN(&old_data, n_len, db_name);
curr_tn = old_data.trans_hist.curr_tn;
old_blk_size = old_data.blk_size;
old_tot_blks = old_data.trans_hist.total_blks;
old_start_vbn = old_data.start_vbn;
bplmap = old_data.bplmap;
old_bit_maps = DIVIDE_ROUND_UP(old_tot_blks, bplmap);
inbuf = (char *)malloc(BACKUP_TEMPFILE_BUFF_SIZE);
sblkh_p = (muinc_blk_hdr_ptr_t)inbuf;
msg_string.addr = msg_buffer;
msg_string.len = SIZEOF(msg_buffer);
memset(&inhead, 0, SIZEOF(inc_header));
rest_blks = 0;
for (ptr = in_files.next; ptr; ptr = ptr->next)
{ /* --- determine source type --- */
type = backup_to_file;
if (0 == ptr->input_file.len)
continue;
else if ('|' == *(ptr->input_file.addr + ptr->input_file.len - 1))
{
type = backup_to_exec;
ptr->input_file.len--;
*(ptr->input_file.addr + ptr->input_file.len) = '\0';
} else if (ptr->input_file.len > 5)
{
lower_to_upper(tcp, (uchar_ptr_t)ptr->input_file.addr, 5);
if (0 == memcmp(tcp, "TCP:/", 5))
{
type = backup_to_tcp;
cut = 5;
while ('/' == *(ptr->input_file.addr + cut))
cut++;
ptr->input_file.len -= cut;
p = ptr->input_file.addr;
while (p < ptr->input_file.addr + ptr->input_file.len)
{
*p = *(p + cut);
p++;
}
*p = '\0';
}
}
/* --- open the input stream --- */
restore_read_errno = 0;
switch(type)
{
case backup_to_file:
common_read = iob_read;
if ((in = iob_open_rd(ptr->input_file.addr, DISK_BLOCK_SIZE, BLOCKING_FACTOR)) == NULL)
{
save_errno = errno;
util_out_print("Error accessing input file !AD. Aborting restore.", TRUE,
ptr->input_file.len, ptr->input_file.addr);
errptr = (char *)STRERROR(save_errno);
util_out_print("open : !AZ", TRUE, errptr);
CLNUP_AND_EXIT(save_errno, inbuf);
}
ESTABLISH(iob_io_error);
break;
case backup_to_exec:
pipe_child = 0;
common_read = exec_read;
in = (BFILE *)malloc(SIZEOF(BFILE));
if (0 > (in->fd = gtm_pipe(ptr->input_file.addr, input_from_comm)))
{
util_out_print("Error creating input pipe from !AD.",
TRUE, ptr->input_file.len, ptr->input_file.addr);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
# ifdef DEBUG_ONLINE
DBGFPF(stdout, "file descriptor for the openned pipe is %d.\n", in->fd);
DBGFPF(stdout, "the command passed to gtm_pipe is %s.\n", ptr->input_file.addr);
# endif
break;
case backup_to_tcp:
common_read = tcp_read;
/* parse the input */
switch (match = SSCANF(ptr->input_file.addr, "%[^:]:%hu", addr, &port))
{
case 1 :
port = DEFAULT_BKRS_PORT;
case 2 :
break;
default :
util_out_print("Error : A hostname has to be specified.", TRUE);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
assert(SIZEOF(timeout) == SIZEOF(int));
if ((0 == cli_get_int("NETTIMEOUT", (int4 *)&timeout)) || (0 > timeout))
timeout = DEFAULT_BKRS_TIMEOUT;
in = (BFILE *)malloc(SIZEOF(BFILE));
iotcp_fillroutine();
if (0 > (in->fd = tcp_open(addr, port, timeout, TRUE)))
{
util_out_print("Error establishing TCP connection to !AD.",
TRUE, ptr->input_file.len, ptr->input_file.addr);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
break;
default:
util_out_print("Aborting restore!/", TRUE);
util_out_print("Unrecognized input format !AD", TRUE, ptr->input_file.len, ptr->input_file.addr);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
COMMON_READ(in, &inhead, SIZEOF(inc_header), inbuf);
if (memcmp(inhead.label, V5_INC_HEADER_LABEL, INC_HDR_LABEL_SZ) &&
(memcmp(inhead.label, INC_HEADER_LABEL, INC_HDR_LABEL_SZ)))
{
util_out_print("Input file !AD has an unrecognizable format", TRUE, ptr->input_file.len,
ptr->input_file.addr);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
# ifdef GTM_CRYPT
is_bkup_file_encrypted = FALSE;
if (inhead.is_encrypted)
{
COMMON_READ(in, bkup_hash, GTMCRYPT_HASH_LEN, inbuf);
is_bkup_file_encrypted = inhead.is_encrypted;
}
# endif
if (curr_tn != inhead.start_tn)
{
util_out_print("Transaction in input file !AD does not align with database TN.!/DB: !16@XQ!_"
"Input file: !16@XQ", TRUE, ptr->input_file.len, ptr->input_file.addr,
&curr_tn, &inhead.start_tn);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
if (old_blk_size != inhead.blk_size)
{
util_out_print("Incompatible block size. Output file !AD has block size !XL,", TRUE, n_len, db_name,
old_blk_size);
util_out_print("while input file !AD is from a database with block size !XL,", TRUE, ptr->input_file.len,
ptr->input_file.addr, inhead.blk_size);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
new_bit_maps = DIVIDE_ROUND_UP(inhead.db_total_blks, bplmap);
if (old_tot_blks != inhead.db_total_blks)
{
if (old_tot_blks > inhead.db_total_blks && truncate)
{
/* Truncate occurred between incremental backups. FTRUNCATE the db file to the appropriate size,
* write the EOF block. */
new_eof = ((off_t)(old_start_vbn - 1) * DISK_BLOCK_SIZE)
+ ((off_t)inhead.db_total_blks * old_blk_size);
new_size = new_eof + DISK_BLOCK_SIZE;
memset(buff, 0, DISK_BLOCK_SIZE);
DB_LSEEKWRITE(NULL, NULL, db_fd, new_eof, buff, DISK_BLOCK_SIZE, status);
if (0 != status)
{
util_out_print("Aborting restore!/", TRUE);
util_out_print("lseek or write error : Error accessing output file !AD while truncating.",
TRUE, n_len, db_name);
totblks = old_tot_blks - old_bit_maps;
util_out_print("Output file !AD has!/ !UL (!XL hex) total blocks,",
TRUE, n_len, db_name, totblks, totblks);
totblks = inhead.db_total_blks - new_bit_maps;
util_out_print("while input file !AD is from a database with!/ !UL (!XL hex) total blocks",
TRUE, ptr->input_file.len, ptr->input_file.addr, totblks, totblks);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
FTRUNCATE(db_fd, new_size, status);
if (0 != status)
{
util_out_print("Aborting restore!/", TRUE);
util_out_print("FTRUNCATE error : Error error truncating output file !AD.",
TRUE, n_len, db_name);
totblks = old_tot_blks - old_bit_maps;
util_out_print("Output file !AD has!/ !UL (!XL hex) total blocks,",
TRUE, n_len, db_name, totblks, totblks);
totblks = inhead.db_total_blks - new_bit_maps;
util_out_print("while input file !AD is from a database with!/ !UL (!XL hex) total blocks",
TRUE, ptr->input_file.len, ptr->input_file.addr, totblks, totblks);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
old_tot_blks = inhead.db_total_blks;
old_bit_maps = new_bit_maps;
} else if (old_tot_blks > inhead.db_total_blks || !extend)
{
totblks = old_tot_blks - old_bit_maps;
util_out_print("Incompatible database sizes. Output file !AD has!/ !UL (!XL hex) total blocks,",
TRUE, n_len, db_name, totblks, totblks);
totblks = inhead.db_total_blks - new_bit_maps;
util_out_print("while input file !AD is from a database with!/ !UL (!XL hex) total blocks",
TRUE, ptr->input_file.len, ptr->input_file.addr, totblks, totblks);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
} else
{ /* The db must be exteneded which we will do ourselves (to avoid jnl and other interferences
in gdsfilext). These local bit map blocks will be created in GDSVCURR format (always). The
reason for this is that we do not know at this time whether these blocks will be replaced
by blocks in the backup or not. If we are in compatibility mode, this is highly likely
even if before image journaling is on which creates bit maps with TN=0. In either case,
a GDSVCURR format block is the only one that can be added to the database without affecting
the blks_to_upgrd counter.
*/
new_eof = ((off_t)(old_start_vbn - 1) * DISK_BLOCK_SIZE)
+ ((off_t)inhead.db_total_blks * old_blk_size);
memset(buff, 0, DISK_BLOCK_SIZE);
DB_LSEEKWRITE(NULL, NULL, db_fd, new_eof, buff, DISK_BLOCK_SIZE, status);
if (0 != status)
{
util_out_print("Aborting restore!/", TRUE);
util_out_print("lseek or write error : Unable to extend output file !AD!/",
TRUE, n_len, db_name);
util_out_print(" from !UL (!XL hex) total blocks to !UL (!XL hex) total blocks.!/",
TRUE, old_tot_blks, old_tot_blks, inhead.db_total_blks, inhead.db_total_blks);
util_out_print(" Current input file is !AD with !UL (!XL hex) total blocks!/",
TRUE, ptr->input_file.len, ptr->input_file.addr,
inhead.db_total_blks, inhead.db_total_blks);
gtm_putmsg(VARLSTCNT(1) status);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
/* --- initialize all new bitmaps, just in case they are not touched later --- */
if (new_bit_maps > old_bit_maps)
{ /* -- similar logic exist in bml_newmap.c, which need to pick up any new updates here -- */
newmap = (char *)malloc(old_blk_size);
((blk_hdr *)newmap)->bver = GDSVCURR;
((blk_hdr *)newmap)->bsiz = (unsigned int)(BM_SIZE(bplmap));
((blk_hdr *)newmap)->levl = LCL_MAP_LEVL;
((blk_hdr *)newmap)->tn = curr_tn;
newmap_bptr = newmap + SIZEOF(blk_hdr);
*newmap_bptr++ = THREE_BLKS_FREE;
memset(newmap_bptr, FOUR_BLKS_FREE, BM_SIZE(bplmap) - SIZEOF(blk_hdr) - 1);
for (ii = ROUND_UP(old_tot_blks, bplmap); ii < inhead.db_total_blks; ii += bplmap)
{
new_eof = (off_t)(old_start_vbn - 1) * DISK_BLOCK_SIZE + (off_t)ii * old_blk_size;
DB_LSEEKWRITE(NULL, NULL, db_fd, new_eof, newmap, old_blk_size, status);
if (0 != status)
{
util_out_print("Aborting restore!/", TRUE);
util_out_print("Bitmap 0x!XL initialization error!", TRUE, ii);
gtm_putmsg(VARLSTCNT(1) status);
free(newmap);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
}
free(newmap);
}
old_tot_blks = inhead.db_total_blks;
old_bit_maps = new_bit_maps;
}
}
rsize = SIZEOF(muinc_blk_hdr) + inhead.blk_size;
# ifdef GTM_CRYPT
if (is_bkup_file_encrypted || old_data.is_encrypted)
{
/* See if the backup file and the target file are going to have
* the same hash thereby speeding up the most common case. */
if (!memcmp(bkup_hash, old_data.encryption_hash, GTMCRYPT_HASH_LEN))
is_same_hash = TRUE;
if (!is_same_hash)
{
INIT_PROC_ENCRYPTION(crypt_status);
if (0 != crypt_status)
CLNUP_AND_EXIT(crypt_status, inbuf);
if (is_bkup_file_encrypted)
{
GTMCRYPT_GETKEY(bkup_hash, bkup_key_handle, crypt_status);
if (0 != crypt_status)
{
GC_GTM_PUTMSG(crypt_status, ptr->input_file.addr);
CLNUP_AND_EXIT(crypt_status, inbuf);
}
}
if (old_data.is_encrypted)
{
GTMCRYPT_GETKEY(old_data.encryption_hash, target_key_handle, crypt_status);
if (0 != crypt_status)
{
GC_GTM_PUTMSG(crypt_status, db_name);
CLNUP_AND_EXIT(crypt_status, inbuf);
}
}
}
}
# endif
for ( ; ;)
{ /* All records are of fixed size so process until we get to a zeroed record marking the end */
COMMON_READ(in, inbuf, rsize, inbuf); /* Note rsize == sblkh_p */
if (0 == sblkh_p->blkid && FALSE == sblkh_p->valid_data)
{ /* This is supposed to be the end of list marker (null entry */
COMMON_READ(in, &rsize, SIZEOF(rsize), inbuf);
if (SIZEOF(END_MSG) + SIZEOF(int4) == rsize)
{ /* the length of our secondary check is correct .. now check substance */
COMMON_READ(in, inbuf, rsize - SIZEOF(int4), inbuf);
if (0 == MEMCMP_LIT(inbuf, END_MSG))
break; /* We are done */
}
util_out_print("Invalid information in restore file !AD. Aborting restore.",
TRUE, ptr->input_file.len,
ptr->input_file.addr);
assert(FALSE);
if (backup_to_file == type)
iob_close(in);
CLNUP_AND_EXIT(ERR_MUPRESTERR, inbuf);
}
rest_blks++;
blk_num = sblkh_p->blkid;
/* Between incremental backups, an extend followed by a truncate could have occurred. The block below
* would have been truncated, so no need to write it. */
GTM_TRUNCATE_ONLY(
if (blk_num >= old_tot_blks) /* Should be a bitmap block */
continue;
)
/* For blocks that were read during the main backup phase of stream backup, the blocks are
recorded without version (there may even be some garbage blocks in the stream of
indeterminate/invalid format if a bitmap was written out prior to the data blocks that
were recently allocated in it). For these blocks, we just write out what we have as a
full block. For blocks that were written out during the backup as part of the online
image processing, these are always recorded in V5 mode. We will rewrite these in the mode
they were oringally found on disk (potentially necessitating a downgrade of the block).
This allows us to exactly match the blks_to_upgrade counter in the saved file-header without
worrying about what blocks were converted (or not) in the interim.
*/
blk_ptr = inbuf + SIZEOF(muinc_blk_hdr);
size = old_blk_size;
if (GDSNOVER != sblkh_p->use.bkup.ondsk_blkver)
{ /* Specifically versioned blocks - Put them back in the version they were originally */
if (GDSV4 == sblkh_p->use.bkup.ondsk_blkver)
{
gds_blk_downgrade((v15_blk_hdr_ptr_t)blk_ptr, (blk_hdr_ptr_t)blk_ptr);
size = (((v15_blk_hdr_ptr_t)blk_ptr)->bsiz + 1) & ~1;
} else
size = (((blk_hdr_ptr_t)blk_ptr)->bsiz + 1) & ~1;
}
# ifdef GTM_CRYPT
assert((size <= old_blk_size) && (size >= SIZEOF(blk_hdr)));
req_dec_blk_size = MIN(old_blk_size, size) - SIZEOF(blk_hdr);
if (!is_same_hash && (BLOCK_REQUIRE_ENCRYPTION(is_bkup_file_encrypted, (((blk_hdr_ptr_t)blk_ptr)->levl),
req_dec_blk_size)))
{
GTMCRYPT_DECODE_FAST(bkup_key_handle,
blk_ptr + SIZEOF(blk_hdr),
req_dec_blk_size,
NULL,
crypt_status);
if (0 != crypt_status)
{
GC_GTM_PUTMSG(crypt_status, ptr->input_file.addr);
CLNUP_AND_EXIT(crypt_status, inbuf);
}
}
# endif
offset = (old_start_vbn - 1) * DISK_BLOCK_SIZE + ((off_t)old_blk_size * blk_num);
# ifdef GTM_CRYPT
if (!is_same_hash && (BLOCK_REQUIRE_ENCRYPTION(old_data.is_encrypted,
(((blk_hdr_ptr_t)blk_ptr)->levl), req_dec_blk_size)))
{
GTMCRYPT_ENCODE_FAST(target_key_handle,
blk_ptr + SIZEOF(blk_hdr),
req_dec_blk_size,
NULL,
crypt_status);
if (0 != crypt_status)
{
GC_GTM_PUTMSG(crypt_status, db_name);
CLNUP_AND_EXIT(crypt_status, inbuf);
}
}
# endif
DB_LSEEKWRITE(NULL, NULL, db_fd, offset, blk_ptr, size, save_errno);
if (0 != save_errno)
{
util_out_print("Error accessing output file !AD. Aborting restore.",
TRUE, n_len, db_name);
errptr = (char *)STRERROR(save_errno);
util_out_print("write : !AZ", TRUE, errptr);
CLNUP_AND_EXIT(save_errno, inbuf);
}
}
/* Next section is the file header which we need to restore */
COMMON_READ(in, &rsize, SIZEOF(rsize), inbuf);
assert((SIZEOF(sgmnt_data) + SIZEOF(int4)) == rsize);
COMMON_READ(in, inbuf, rsize, inbuf);
((sgmnt_data_ptr_t)inbuf)->start_vbn = old_start_vbn;
((sgmnt_data_ptr_t)inbuf)->free_space = (uint4)(((old_start_vbn - 1) * DISK_BLOCK_SIZE) - SIZEOF_FILE_HDR(inbuf));
GTMCRYPT_ONLY(
memcpy(((sgmnt_data_ptr_t)inbuf)->encryption_hash, old_data.encryption_hash, GTMCRYPT_HASH_LEN);
((sgmnt_data_ptr_t)inbuf)->is_encrypted = old_data.is_encrypted;
)
assert((udi->semid == old_data.semid) && (udi->gt_sem_ctime == old_data.gt_sem_ctime.ctime)
&& (udi->shmid == old_data.shmid) && (udi->gt_shm_ctime == old_data.gt_shm_ctime.ctime));
/* Since the file header we are about to write is taken from the BACKUP database, the semid/shmid (and the
* corresponding ctime fields) will be INVALID. But, we want the restor'ed file to continue having standalone
* access until we are done with MUPIP RESTORE (and release the semaphores and clear the file header fields in
* db_ipcs_reset). So, before writing the new file header, set the semid/shmid (and ctime fields) to the semid and
* shmid fields that is currently valid in the system (when we did the mu_rndwn_file).
*/
((sgmnt_data_ptr_t)inbuf)->semid = old_data.semid;
((sgmnt_data_ptr_t)inbuf)->gt_sem_ctime.ctime = old_data.gt_sem_ctime.ctime;
((sgmnt_data_ptr_t)inbuf)->shmid = old_data.shmid;
((sgmnt_data_ptr_t)inbuf)->gt_shm_ctime.ctime = old_data.gt_shm_ctime.ctime;
DB_LSEEKWRITE(NULL, NULL, db_fd, 0, inbuf, rsize - SIZEOF(int4), save_errno);
if (0 != save_errno)
{
util_out_print("Error accessing output file !AD. Aborting restore.",
TRUE, n_len, db_name);
errptr = (char *)STRERROR(save_errno);
util_out_print("write : !AZ", TRUE, errptr);
CLNUP_AND_EXIT(save_errno, inbuf);
}
GET_LONG(temp, (inbuf + rsize - SIZEOF(int4)));
rsize = temp;
COMMON_READ(in, inbuf, rsize, inbuf);
if (0 != MEMCMP_LIT(inbuf, HDR_MSG))
{
util_out_print("Unexpected backup format error restoring !AD. Aborting restore.",
TRUE, n_len, db_name);
errptr = (char *)STRERROR(save_errno);
util_out_print("write : !AZ", TRUE, errptr);
CLNUP_AND_EXIT(save_errno, inbuf);
}
GET_LONG(temp, (inbuf + rsize - SIZEOF(int4)));
rsize = temp;
offset = (MM_BLOCK - 1) * DISK_BLOCK_SIZE;
assert(SGMNT_HDR_LEN == offset); /* Still have contiguou master map for now */
for (i = 0; ; i++) /* Restore master map */
{
COMMON_READ(in, inbuf, rsize, inbuf);
if (!MEMCMP_LIT(inbuf, MAP_MSG))
break;
DB_LSEEKWRITE(NULL, NULL, db_fd,
offset,
inbuf,
rsize - SIZEOF(int4),
save_errno);
if (0 != save_errno)
{
util_out_print("Error accessing output file !AD. Aborting restore.",
TRUE, n_len, db_name);
errptr = (char *)STRERROR(save_errno);
util_out_print("write : !AZ", TRUE, errptr);
CLNUP_AND_EXIT(save_errno, inbuf);
}
offset += rsize - SIZEOF(int4);
GET_LONG(temp, (inbuf + rsize - SIZEOF(int4)));
rsize = temp;
}
curr_tn = inhead.end_tn;
switch (type)
{
case backup_to_file:
REVERT;
iob_close(in);
break;
case backup_to_exec:
CLOSEFILE_RESET(in->fd, rc); /* resets "in->fd" to FD_INVALID */
if ((pipe_child > 0) && (FALSE != is_proc_alive(pipe_child, 0)))
WAITPID(pipe_child, (int *)&status, 0, waitpid_res);
break;
case backup_to_tcp:
break;
}
}
util_out_print("!/RESTORE COMPLETED", TRUE);
util_out_print("!UL blocks restored", TRUE, rest_blks);
CLNUP_AND_EXIT(SS_NORMAL, inbuf);
}
STATICFNDEF void exec_read(BFILE *bf, char *buf, int nbytes)
{
int needed, got;
int4 status;
char *curr;
pid_t waitpid_res;
int rc;
assert(nbytes > 0);
needed = nbytes;
curr = buf;
# ifdef DEBUG_ONLINE
DBGFPF(stdout, "file descriptor is %d and bytes needed is %d\n", bf->fd, needed);
# endif
while(0 != (got = (int)(read(bf->fd, curr, needed))))
{
if (got == needed)
break;
else if (got > 0)
{
needed -= got;
curr += got;
}
/* the check for EINTR below is valid and should not be converted to an EINTR
* wrapper macro, for an immediate retry is not attempted. Instead, wcs_sleep
* is called.
*/
else if ((EINTR != errno) && (EAGAIN != errno))
{
gtm_putmsg(VARLSTCNT(1) errno);
if ((pipe_child > 0) && (FALSE != is_proc_alive(pipe_child, 0)))
WAITPID(pipe_child, (int *)&status, 0, waitpid_res);
CLOSEFILE_RESET(bf->fd, rc); /* resets "bf->fd" to FD_INVALID */
restore_read_errno = errno;
break;
}
wcs_sleep(100);
}
return;
}
/* the logic here can be reused in iotcp_readfl.c and iosocket_readfl.c */
STATICFNDEF void tcp_read(BFILE *bf, char *buf, int nbytes)
{
int needed, status;
char *curr;
fd_set fs;
ABS_TIME save_nap, nap;
int rc;
needed = nbytes;
curr = buf;
nap.at_sec = 1;
nap.at_usec = 0;
while (1)
{
FD_ZERO(&fs);
FD_SET(bf->fd, &fs);
assert(0 != FD_ISSET(bf->fd, &fs));
/* Note: the check for EINTR from the select below should remain, as aa_select is a
* function, and not all callers of aa_select behave the same when EINTR is returned.
*/
save_nap = nap;
status = tcp_routines.aa_select(bf->fd + 1, (void *)(&fs), (void *)0, (void *)0, &nap);
nap = save_nap;
if (status > 0)
{
status = tcp_routines.aa_recv(bf->fd, curr, needed, 0);
if ((0 == status) || (needed == status)) /* lost connection or all set */
{
break;
} else if (status > 0)
{
needed -= status;
curr += status;
}
}
if ((status < 0) && (errno != EINTR))
{
gtm_putmsg(VARLSTCNT(1) errno);
CLOSEFILE_RESET(bf->fd, rc); /* resets "bf->fd" to FD_INVALID */
restore_read_errno = errno;
break;
}
}
return;
}
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