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* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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* For further information regarding this notice, see:
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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#include <xfs_log_priv.h>
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#define BBTOOFF64(bbs) (((xfs_off_t)(bbs)) << BBSHIFT)
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#define BDSTRAT_SIZE (256 * 1024)
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libxfs_device_zero(dev_t dev, xfs_daddr_t start, uint len)
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size = BDSTRAT_SIZE <= BBTOB(len) ? BDSTRAT_SIZE : BBTOB(len);
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if ((z = memalign(getpagesize(), size)) == NULL) {
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fprintf(stderr, "%s: device_zero can't memalign %d bytes: %s\n",
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progname, size, strerror(errno));
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fd = libxfs_device_to_fd(dev);
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for (bno = start; bno < start + len; ) {
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nblks = (uint)BTOBB(size);
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if (bno + nblks > start + len)
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nblks = (uint)(start + len - bno);
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if (lseek64(fd, BBTOOFF64(bno), SEEK_SET) < 0) {
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fprintf(stderr, "%s: device_zero lseek64 failed: %s\n",
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progname, strerror(errno));
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if (write(fd, z, BBTOB(nblks)) < BBTOB(nblks)) {
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fprintf(stderr, "%s: device_zero write failed: %s\n",
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progname, strerror(errno));
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xlog_rec_header_t *head;
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/* the data section must be 32 bit size aligned */
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__uint32_t pad2; /* may as well make it 64 bits */
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} magic = { XLOG_UNMOUNT_TYPE, 0, 0 };
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if (!device || !fs_uuid)
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/* first zero the log */
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libxfs_device_zero(device, start, length);
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/* then write a log record header */
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buf = libxfs_getbuf(device, start, 1);
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memset(XFS_BUF_PTR(buf), 0, BBSIZE);
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head = (xlog_rec_header_t *)XFS_BUF_PTR(buf);
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/* note that oh_tid actually contains the cycle number
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* and the tid is stored in h_cycle_data[0] - that's the
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* way things end up on disk.
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INT_SET(head->h_magicno, ARCH_CONVERT, XLOG_HEADER_MAGIC_NUM);
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INT_SET(head->h_cycle, ARCH_CONVERT, 1);
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INT_SET(head->h_version, ARCH_CONVERT, 1);
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INT_SET(head->h_len, ARCH_CONVERT, 20);
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INT_SET(head->h_chksum, ARCH_CONVERT, 0);
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INT_SET(head->h_prev_block, ARCH_CONVERT, -1);
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INT_SET(head->h_num_logops, ARCH_CONVERT, 1);
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INT_SET(head->h_cycle_data[0], ARCH_CONVERT, 0xb0c0d0d0);
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INT_SET(head->h_fmt, ARCH_CONVERT, fmt);
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ASSIGN_ANY_LSN(head->h_lsn, 1, 0, ARCH_CONVERT);
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ASSIGN_ANY_LSN(head->h_tail_lsn, 1, 0, ARCH_CONVERT);
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memcpy(head->h_fs_uuid, fs_uuid, sizeof(uuid_t));
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if (libxfs_writebuf(buf, 0))
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buf = libxfs_getbuf(device, start + 1, 1);
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/* now a log unmount op */
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memset(XFS_BUF_PTR(buf), 0, BBSIZE);
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op = (xlog_op_header_t *)XFS_BUF_PTR(buf);
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INT_SET(op->oh_tid, ARCH_CONVERT, 1);
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INT_SET(op->oh_len, ARCH_CONVERT, sizeof(magic));
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INT_SET(op->oh_clientid, ARCH_CONVERT, XFS_LOG);
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INT_SET(op->oh_flags, ARCH_CONVERT, XLOG_UNMOUNT_TRANS);
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INT_SET(op->oh_res2, ARCH_CONVERT, 0);
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/* and the data for this op */
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memcpy(XFS_BUF_PTR(buf) + sizeof(xlog_op_header_t),
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if (libxfs_writebuf(buf, 0))
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* Simple I/O interface
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libxfs_getbuf(dev_t device, xfs_daddr_t blkno, int len)
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total = sizeof(xfs_buf_t) + BBTOB(len);
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if ((buf = calloc(total, 1)) == NULL) {
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fprintf(stderr, "%s: buf calloc failed (%ld bytes): %s\n",
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progname, (long)total, strerror(errno));
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/* by default, we allocate buffer directly after the header */
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buf->b_blkno = blkno;
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buf->b_bcount = BBTOB(len);
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buf->b_addr = (char *)(&buf->b_addr + 1); /* must be last field */
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fprintf(stderr, "getbuf allocated %ubytes, blkno=%llu(%llu), %p\n",
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BBTOB(len), BBTOOFF64(blkno), blkno, buf);
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libxfs_readbufr(dev_t dev, xfs_daddr_t blkno, xfs_buf_t *buf, int len, int die)
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int fd = libxfs_device_to_fd(dev);
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buf->b_blkno = blkno;
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ASSERT(BBTOB(len) <= buf->b_bcount);
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if (lseek64(fd, BBTOOFF64(blkno), SEEK_SET) < 0) {
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fprintf(stderr, "%s: lseek64 to %llu failed: %s\n", progname,
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(unsigned long long)BBTOOFF64(blkno), strerror(errno));
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if (read(fd, buf->b_addr, BBTOB(len)) < 0) {
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fprintf(stderr, "%s: read failed: %s\n",
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progname, strerror(errno));
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fprintf(stderr, "readbufr read %ubytes, blkno=%llu(%llu), %p\n",
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BBTOB(len), BBTOOFF64(blkno), blkno, buf);
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libxfs_readbuf(dev_t dev, xfs_daddr_t blkno, int len, int die)
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buf = libxfs_getbuf(dev, blkno, len);
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error = libxfs_readbufr(dev, blkno, buf, len, die);
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libxfs_getsb(xfs_mount_t *mp, int die)
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return libxfs_readbuf(mp->m_dev, XFS_SB_DADDR,
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XFS_FSB_TO_BB(mp, 1), die);
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libxfs_writebuf_int(xfs_buf_t *buf, int die)
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int fd = libxfs_device_to_fd(buf->b_dev);
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if (lseek64(fd, BBTOOFF64(buf->b_blkno), SEEK_SET) < 0) {
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fprintf(stderr, "%s: lseek64 to %llu failed: %s\n", progname,
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(unsigned long long)BBTOOFF64(buf->b_blkno), strerror(errno));
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fprintf(stderr, "writing %ubytes at blkno=%llu(%llu), %p\n",
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buf->b_bcount, BBTOOFF64(buf->b_blkno), buf->b_blkno, buf);
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sts = write(fd, buf->b_addr, buf->b_bcount);
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fprintf(stderr, "%s: write failed: %s\n",
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progname, strerror(errno));
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else if (sts != buf->b_bcount) {
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fprintf(stderr, "%s: error - wrote only %d of %d bytes\n",
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progname, sts, buf->b_bcount);
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libxfs_writebuf(xfs_buf_t *buf, int die)
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int error = libxfs_writebuf_int(buf, die);
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libxfs_putbuf(xfs_buf_t *buf)
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xfs_buf_log_item_t *bip;
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extern xfs_zone_t *xfs_buf_item_zone;
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bip = XFS_BUF_FSPRIVATE(buf, xfs_buf_log_item_t *);
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libxfs_zone_free(xfs_buf_item_zone, bip);
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fprintf(stderr, "putbuf released %ubytes, %p\n",
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* Simple memory interface
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libxfs_zone_init(int size, char *name)
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if ((ptr = malloc(sizeof(xfs_zone_t))) == NULL) {
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fprintf(stderr, "%s: zone init failed (%s, %d bytes): %s\n",
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progname, name, (int)sizeof(xfs_zone_t), strerror(errno));
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ptr->zone_unitsize = size;
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ptr->zone_name = name;
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fprintf(stderr, "new zone %p for \"%s\", size=%d\n", ptr, name, size);
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libxfs_zone_zalloc(xfs_zone_t *z)
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if ((ptr = calloc(z->zone_unitsize, 1)) == NULL) {
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fprintf(stderr, "%s: zone calloc failed (%s, %d bytes): %s\n",
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progname, z->zone_name, z->zone_unitsize,
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fprintf(stderr, "## zone alloc'd item %p from %s (%d bytes) (%d active)\n",
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ptr, z->zone_name, z->zone_unitsize,
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libxfs_zone_free(xfs_zone_t *z, void *ptr)
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fprintf(stderr, "## zone freed item %p from %s (%d bytes) (%d active)\n",
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ptr, z->zone_name, z->zone_unitsize,
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libxfs_malloc(size_t size)
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if ((ptr = calloc(1, size)) == NULL) {
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fprintf(stderr, "%s: calloc failed (%d bytes): %s\n",
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progname, (int)size, strerror(errno));
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fprintf(stderr, "## calloc'd item %p size %d bytes\n",
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libxfs_free(void *ptr)
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fprintf(stderr, "## freed item %p\n",
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libxfs_realloc(void *ptr, size_t size)
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if ((ptr = realloc(ptr, size)) == NULL) {
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fprintf(stderr, "%s: realloc failed (%d bytes): %s\n",
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progname, (int)size, strerror(errno));
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fprintf(stderr, "## realloc'd item %p now %p size %d bytes\n",
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libxfs_iget(xfs_mount_t *mp, xfs_trans_t *tp, xfs_ino_t ino, uint lock_flags,
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xfs_inode_t **ipp, xfs_daddr_t bno)
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error = libxfs_iread(mp, tp, ino, &ip, bno);
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libxfs_iput(xfs_inode_t *ip, uint lock_flags)
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extern xfs_zone_t *xfs_ili_zone;
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extern xfs_zone_t *xfs_inode_zone;
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/* free attached inode log item */
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libxfs_zone_free(xfs_ili_zone, ip->i_itemp);
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libxfs_zone_free(xfs_inode_zone, ip);
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* libxfs_mod_sb can be used to copy arbitrary changes to the
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* in-core superblock into the superblock buffer to be logged.
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* In user-space, we simply convert to big-endian, and write the
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* the whole superblock - the in-core changes have all been made
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libxfs_mod_sb(xfs_trans_t *tp, __int64_t fields)
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bp = libxfs_getbuf(mp->m_dev, XFS_SB_DADDR, 1);
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libxfs_xlate_sb(XFS_BUF_PTR(bp), &mp->m_sb, -1, ARCH_CONVERT,
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libxfs_writebuf(bp, 1);