static void
scan_ag(
xfs_agnumber_t agno)
{
xfs_agf_t *agf;
xfs_agi_t *agi;
push_cur();
set_cur(&typtab[TYP_AGF],
XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
XFS_FSS_TO_BB(mp, 1), DB_RING_IGN, NULL);
if ((agf = iocur_top->data) == NULL) {
dbprintf(_("can't read agf block for ag %u\n"), agno);
pop_cur();
return;
}
push_cur();
set_cur(&typtab[TYP_AGI],
XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
XFS_FSS_TO_BB(mp, 1), DB_RING_IGN, NULL);
if ((agi = iocur_top->data) == NULL) {
dbprintf(_("can't read agi block for ag %u\n"), agno);
pop_cur();
pop_cur();
return;
}
scan_sbtree(agf, be32_to_cpu(agi->agi_root),
be32_to_cpu(agi->agi_level), scanfunc_ino, TYP_INOBT);
pop_cur();
pop_cur();
}
static void
process_agi_unlinked(
struct xfs_mount *mp,
xfs_agnumber_t agno)
{
struct xfs_buf *bp;
struct xfs_agi *agip;
xfs_agnumber_t i;
int agi_dirty = 0;
bp = libxfs_readbuf(mp->m_dev,
XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
mp->m_sb.sb_sectsize/BBSIZE, 0, &xfs_agi_buf_ops);
if (!bp)
do_error(_("cannot read agi block %" PRId64 " for ag %u\n"),
XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), agno);
agip = XFS_BUF_TO_AGI(bp);
ASSERT(be32_to_cpu(agip->agi_seqno) == agno);
for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++) {
if (agip->agi_unlinked[i] != cpu_to_be32(NULLAGINO)) {
agip->agi_unlinked[i] = cpu_to_be32(NULLAGINO);
agi_dirty = 1;
}
}
if (agi_dirty)
libxfs_writebuf(bp, 0);
else
libxfs_putbuf(bp);
}
static int
get_sb(xfs_agnumber_t agno, xfs_sb_t *sb)
{
push_cur();
set_cur(&typtab[TYP_SB],
XFS_AG_DADDR(mp, agno, XFS_SB_DADDR),
XFS_FSS_TO_BB(mp, 1), DB_RING_IGN, NULL);
if (!iocur_top->data) {
dbprintf(_("can't read superblock for AG %u\n"), agno);
pop_cur();
return 0;
}
libxfs_sb_from_disk(sb, iocur_top->data);
if (sb->sb_magicnum != XFS_SB_MAGIC) {
dbprintf(_("bad sb magic # %#x in AG %u\n"),
sb->sb_magicnum, agno);
return 0;
}
if (!xfs_sb_good_version(sb)) {
dbprintf(_("bad sb version # %#x in AG %u\n"),
sb->sb_versionnum, agno);
return 0;
}
if (agno == 0 && sb->sb_inprogress != 0) {
dbprintf(_("mkfs not completed successfully\n"));
return 0;
}
return 1;
}
static int
get_sb(xfs_agnumber_t agno, xfs_sb_t *sb)
{
push_cur();
set_cur(&typtab[TYP_SB], XFS_AG_DADDR(mp, agno, XFS_SB_DADDR), 1,
DB_RING_IGN, NULL);
if (!iocur_top->data) {
dbprintf("can't read superblock for AG %u\n", agno);
pop_cur();
return 0;
}
libxfs_xlate_sb(iocur_top->data, sb, 1, ARCH_CONVERT, XFS_SB_ALL_BITS);
if (sb->sb_magicnum != XFS_SB_MAGIC) {
dbprintf("bad sb magic # %#x in AG %u\n",
sb->sb_magicnum, agno);
return 0;
}
if (!XFS_SB_GOOD_VERSION(sb)) {
dbprintf("bad sb version # %#x in AG %u\n",
sb->sb_versionnum, agno);
return 0;
}
if (agno == 0 && sb->sb_inprogress != 0) {
dbprintf("mkfs not completed successfully\n");
return 0;
}
return 1;
}
void
read_ag_header(int fd, xfs_agnumber_t agno, wbuf *buf, ag_header_t *ag,
xfs_mount_t *mp, int blocksize, int sectorsize)
{
xfs_daddr_t off;
int length;
xfs_off_t newpos;
size_t diff;
/* initial settings */
diff = 0;
off = XFS_AG_DADDR(mp, agno, XFS_SB_DADDR);
buf->position = (xfs_off_t) off * (xfs_off_t) BBSIZE;
length = buf->length = first_agbno * blocksize;
if (length == 0) {
do_log(_("ag header buffer invalid!\n"));
exit(1);
}
/* handle alignment stuff */
newpos = rounddown(buf->position, (xfs_off_t) buf->min_io_size);
if (newpos != buf->position) {
diff = buf->position - newpos;
buf->position = newpos;
buf->length += diff;
}
/* round up length for direct I/O if necessary */
if (buf->length % buf->min_io_size != 0)
buf->length = roundup(buf->length, buf->min_io_size);
read_wbuf(fd, buf, mp);
ASSERT(buf->length >= length);
ag->xfs_sb = (xfs_dsb_t *) (buf->data + diff);
ASSERT(be32_to_cpu(ag->xfs_sb->sb_magicnum) == XFS_SB_MAGIC);
ag->xfs_agf = (xfs_agf_t *) (buf->data + diff + sectorsize);
ASSERT(be32_to_cpu(ag->xfs_agf->agf_magicnum) == XFS_AGF_MAGIC);
ag->xfs_agi = (xfs_agi_t *) (buf->data + diff + 2 * sectorsize);
ASSERT(be32_to_cpu(ag->xfs_agi->agi_magicnum) == XFS_AGI_MAGIC);
ag->xfs_agfl = (xfs_agfl_t *) (buf->data + diff + 3 * sectorsize);
}
/*
* XXX: yet more code that can be shared with mkfs, growfs.
*/
static void
build_agi(xfs_mount_t *mp, xfs_agnumber_t agno, bt_status_t *btree_curs,
bt_status_t *finobt_curs, struct agi_stat *agi_stat)
{
xfs_buf_t *agi_buf;
xfs_agi_t *agi;
int i;
agi_buf = libxfs_getbuf(mp->m_dev,
XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
mp->m_sb.sb_sectsize/BBSIZE);
agi_buf->b_ops = &xfs_agi_buf_ops;
agi = XFS_BUF_TO_AGI(agi_buf);
memset(agi, 0, mp->m_sb.sb_sectsize);
agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
agi->agi_seqno = cpu_to_be32(agno);
if (agno < mp->m_sb.sb_agcount - 1)
agi->agi_length = cpu_to_be32(mp->m_sb.sb_agblocks);
else
agi->agi_length = cpu_to_be32(mp->m_sb.sb_dblocks -
(xfs_rfsblock_t) mp->m_sb.sb_agblocks * agno);
agi->agi_count = cpu_to_be32(agi_stat->count);
agi->agi_root = cpu_to_be32(btree_curs->root);
agi->agi_level = cpu_to_be32(btree_curs->num_levels);
agi->agi_freecount = cpu_to_be32(agi_stat->freecount);
agi->agi_newino = cpu_to_be32(agi_stat->first_agino);
agi->agi_dirino = cpu_to_be32(NULLAGINO);
for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++)
agi->agi_unlinked[i] = cpu_to_be32(NULLAGINO);
if (xfs_sb_version_hascrc(&mp->m_sb))
platform_uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid);
if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
agi->agi_free_root = cpu_to_be32(finobt_curs->root);
agi->agi_free_level = cpu_to_be32(finobt_curs->num_levels);
}
libxfs_writebuf(agi_buf, 0);
}
static int
sb_f(
int argc,
char **argv)
{
xfs_agnumber_t agno;
char *p;
if (argc > 1) {
agno = (xfs_agnumber_t)strtoul(argv[1], &p, 0);
if (*p != '\0' || agno >= mp->m_sb.sb_agcount) {
dbprintf("bad allocation group number %s\n", argv[1]);
return 0;
}
cur_agno = agno;
} else if (cur_agno == NULLAGNUMBER)
cur_agno = 0;
ASSERT(typtab[TYP_SB].typnm == TYP_SB);
set_cur(&typtab[TYP_SB], XFS_AG_DADDR(mp, cur_agno, XFS_SB_DADDR), 1,
DB_RING_ADD, NULL);
return 0;
}
xfs_daddr_t
xfs_ag_daddr(xfs_mount_t *mp, xfs_agnumber_t agno, xfs_daddr_t d)
{
return XFS_AG_DADDR(mp, agno, d);
}
extern void readbitmap(char* device, image_head image_hdr, unsigned long* bitmap, int pui)
{
xfs_agnumber_t agno = 0;
xfs_agblock_t first_agbno;
xfs_agnumber_t num_ags;
ag_header_t ag_hdr;
xfs_daddr_t read_ag_off;
int read_ag_length;
void *read_ag_buf = NULL;
xfs_off_t read_ag_position; /* xfs_types.h: typedef __s64 */
uint64_t sk, res, s_pos = 0;
void *btree_buf_data = NULL;
int btree_buf_length;
xfs_off_t btree_buf_position;
xfs_agblock_t bno;
uint current_level;
uint btree_levels;
xfs_daddr_t begin, next_begin, ag_begin, new_begin, ag_end;
/* xfs_types.h: typedef __s64*/
xfs_off_t pos;
xfs_alloc_ptr_t *ptr;
xfs_alloc_rec_t *rec_ptr;
int length;
int i;
uint64_t size, sizeb;
xfs_off_t w_position;
int w_length;
int wblocks;
int w_size = 1 * 1024 * 1024;
uint64_t numblocks = 0;
xfs_off_t logstart, logend;
xfs_off_t logstart_pos, logend_pos;
int log_length;
struct xfs_btree_block *block;
uint64_t current_block, block_count, prog_cur_block = 0;
int start = 0;
int bit_size = 1;
progress_bar prog;
uint64_t bused = 0;
uint64_t bfree = 0;
/// init progress
progress_init(&prog, start, image_hdr.totalblock, image_hdr.totalblock, BITMAP, bit_size);
fs_open(device);
first_agbno = (((XFS_AGFL_DADDR(mp) + 1) * source_sectorsize) + first_residue) / source_blocksize;
num_ags = mp->m_sb.sb_agcount;
log_mesg(1, 0, 0, fs_opt.debug, "ags = %i\n", num_ags);
for (agno = 0; agno < num_ags ; agno++) {
/* read in first blocks of the ag */
/* initial settings */
log_mesg(2, 0, 0, fs_opt.debug, "read ag %i header\n", agno);
read_ag_off = XFS_AG_DADDR(mp, agno, XFS_SB_DADDR);
read_ag_length = first_agbno * source_blocksize;
read_ag_position = (xfs_off_t) read_ag_off * (xfs_off_t) BBSIZE;
read_ag_buf = malloc(read_ag_length);
if(read_ag_buf == NULL){
log_mesg(0, 1, 1, fs_opt.debug, "%s, %i, ERROR:%s", __func__, __LINE__, strerror(errno));
}
memset(read_ag_buf, 0, read_ag_length);
log_mesg(2, 0, 0, fs_opt.debug, "seek to read_ag_position %lli\n", read_ag_position);
sk = lseek(source_fd, read_ag_position, SEEK_SET);
current_block = (sk/source_blocksize);
block_count = (read_ag_length/source_blocksize);
set_bitmap(bitmap, sk, read_ag_length);
log_mesg(2, 0, 0, fs_opt.debug, "read ag header fd = %llu(%i), length = %i(%i)\n", sk, current_block, read_ag_length, block_count);
if ((res = read(source_fd, read_ag_buf, read_ag_length)) < 0) {
log_mesg(1, 0, 1, fs_opt.debug, "read failure at offset %lld\n", read_ag_position);
}
ag_hdr.xfs_sb = (xfs_dsb_t *) (read_ag_buf);
ASSERT(be32_to_cpu(ag_hdr.xfs_sb->sb_magicnum) == XFS_SB_MAGIC);
ag_hdr.xfs_agf = (xfs_agf_t *) (read_ag_buf + source_sectorsize);
ASSERT(be32_to_cpu(ag_hdr.xfs_agf->agf_magicnum) == XFS_AGF_MAGIC);
ag_hdr.xfs_agi = (xfs_agi_t *) (read_ag_buf + 2 * source_sectorsize);
ASSERT(be32_to_cpu(ag_hdr.xfs_agi->agi_magicnum) == XFS_AGI_MAGIC);
ag_hdr.xfs_agfl = (xfs_agfl_t *) (read_ag_buf + 3 * source_sectorsize);
log_mesg(2, 0, 0, fs_opt.debug, "ag header read ok\n");
/* save what we need (agf) in the btree buffer */
btree_buf_data = malloc(source_blocksize);
if(btree_buf_data == NULL){
log_mesg(0, 1, 1, fs_opt.debug, "%s, %i, ERROR:%s", __func__, __LINE__, strerror(errno));
}
memset(btree_buf_data, 0, source_blocksize);
memmove(btree_buf_data, ag_hdr.xfs_agf, source_sectorsize);
ag_hdr.xfs_agf = (xfs_agf_t *) btree_buf_data;
btree_buf_length = source_blocksize;
///* traverse btree until we get to the leftmost leaf node */
bno = be32_to_cpu(ag_hdr.xfs_agf->agf_roots[XFS_BTNUM_BNOi]);
current_level = 0;
btree_levels = be32_to_cpu(ag_hdr.xfs_agf->agf_levels[XFS_BTNUM_BNOi]);
ag_end = XFS_AGB_TO_DADDR(mp, agno, be32_to_cpu(ag_hdr.xfs_agf->agf_length) - 1) + source_blocksize / BBSIZE;
for (;;) {
/* none of this touches the w_buf buffer */
current_level++;
btree_buf_position = pos = (xfs_off_t)XFS_AGB_TO_DADDR(mp,agno,bno) << BBSHIFT;
btree_buf_length = source_blocksize;
sk = lseek(source_fd, btree_buf_position, SEEK_SET);
current_block = (sk/source_blocksize);
block_count = (btree_buf_length/source_blocksize);
set_bitmap(bitmap, sk, btree_buf_length);
log_mesg(2, 0, 0, fs_opt.debug, "read btree sf = %llu(%i), length = %i(%i)\n", sk, current_block, btree_buf_length, block_count);
read(source_fd, btree_buf_data, btree_buf_length);
block = (struct xfs_btree_block *)((char *)btree_buf_data + pos - btree_buf_position);
if (be16_to_cpu(block->bb_level) == 0)
break;
ptr = XFS_ALLOC_PTR_ADDR(mp, block, 1, mp->m_alloc_mxr[1]);
bno = be32_to_cpu(ptr[0]);
}
log_mesg(2, 0, 0, fs_opt.debug, "btree read done\n");
/* align first data copy but don't overwrite ag header */
pos = read_ag_position >> BBSHIFT;
length = read_ag_length >> BBSHIFT;
next_begin = pos + length;
ag_begin = next_begin;
///* handle the rest of the ag */
for (;;) {
if (be16_to_cpu(block->bb_level) != 0) {
log_mesg(0, 1, 1, fs_opt.debug, "WARNING: source filesystem inconsistent.\nA leaf btree rec isn't a leaf. Aborting now.\n");
}
rec_ptr = XFS_ALLOC_REC_ADDR(mp, block, 1);
for (i = 0; i < be16_to_cpu(block->bb_numrecs); i++, rec_ptr++) {
/* calculate in daddr's */
begin = next_begin;
/*
* protect against pathological case of a
* hole right after the ag header in a
* mis-aligned case
*/
if (begin < ag_begin)
begin = ag_begin;
/*
* round size up to ensure we copy a
* range bigger than required
*/
log_mesg(3, 0, 0, fs_opt.debug, "XFS_AGB_TO_DADDR = %llu, agno = %i, be32_to_cpu=%llu\n", XFS_AGB_TO_DADDR(mp, agno, be32_to_cpu(rec_ptr->ar_startblock)), agno, be32_to_cpu(rec_ptr->ar_startblock));
sizeb = XFS_AGB_TO_DADDR(mp, agno, be32_to_cpu(rec_ptr->ar_startblock)) - begin;
size = roundup(sizeb <<BBSHIFT, source_sectorsize);
log_mesg(3, 0, 0, fs_opt.debug, "BB = %i size %i and sizeb %llu brgin = %llu\n", BBSHIFT, size, sizeb, begin);
if (size > 0) {
/* copy extent */
log_mesg(2, 0, 0, fs_opt.debug, "copy extent\n");
w_position = (xfs_off_t)begin << BBSHIFT;
while (size > 0) {
/*
* let lower layer do alignment
*/
if (size > w_size) {
w_length = w_size;
size -= w_size;
sizeb -= wblocks;
numblocks += wblocks;
} else {
w_length = size;
numblocks += sizeb;
size = 0;
}
//read_wbuf(source_fd, &w_buf, mp);
sk = lseek(source_fd, w_position, SEEK_SET);
current_block = (sk/source_blocksize);
block_count = (w_length/source_blocksize);
set_bitmap(bitmap, sk, w_length);
log_mesg(2, 0, 0, fs_opt.debug, "read ext sourcefd to w_buf source_fd=%llu(%i), length=%i(%i)\n", sk, current_block, w_length, block_count);
sk = lseek(source_fd, w_length, SEEK_CUR);
w_position += w_length;
}
}
/* round next starting point down */
new_begin = XFS_AGB_TO_DADDR(mp, agno, be32_to_cpu(rec_ptr->ar_startblock) + be32_to_cpu(rec_ptr->ar_blockcount));
next_begin = rounddown(new_begin, source_sectorsize >> BBSHIFT);
}
if (be32_to_cpu(block->bb_u.s.bb_rightsib) == NULLAGBLOCK){
log_mesg(2, 0, 0, fs_opt.debug, "NULLAGBLOCK\n");
break;
}
/* read in next btree record block */
btree_buf_position = pos = (xfs_off_t)XFS_AGB_TO_DADDR(mp, agno, be32_to_cpu(block->bb_u.s.bb_rightsib)) << BBSHIFT;
btree_buf_length = source_blocksize;
/* let read_wbuf handle alignment */
//read_wbuf(source_fd, &btree_buf, mp);
sk = lseek(source_fd, btree_buf_position, SEEK_SET);
current_block = (sk/source_blocksize);
block_count = (btree_buf_length/source_blocksize);
set_bitmap(bitmap, sk, btree_buf_length);
log_mesg(2, 0, 0, fs_opt.debug, "read btreebuf fd = %llu(%i), length = %i(%i) \n", sk, current_block, btree_buf_length, block_count);
read(source_fd, btree_buf_data, btree_buf_length);
block = (struct xfs_btree_block *)((char *) btree_buf_data + pos - btree_buf_position);
ASSERT(be32_to_cpu(block->bb_magic) == XFS_ABTB_MAGIC);
}
/*
* write out range of used blocks after last range
* of free blocks in AG
*/
if (next_begin < ag_end) {
begin = next_begin;
sizeb = ag_end - begin;
size = roundup(sizeb << BBSHIFT, source_sectorsize);
if (size > 0) {
/* copy extent */
w_position = (xfs_off_t) begin << BBSHIFT;
while (size > 0) {
/*
* let lower layer do alignment
*/
if (size > w_size) {
w_length = w_size;
size -= w_size;
sizeb -= wblocks;
numblocks += wblocks;
} else {
w_length = size;
numblocks += sizeb;
size = 0;
}
sk = lseek(source_fd, w_position, SEEK_SET);
current_block = (sk/source_blocksize);
block_count = (w_length/source_blocksize);
set_bitmap(bitmap, sk, w_length);
log_mesg(2, 0, 0, fs_opt.debug, "read ext fd = %llu(%i), length = %i(%i)\n", sk, current_block, w_length, block_count);
//read_wbuf(source_fd, &w_buf, mp);
lseek(source_fd, w_length, SEEK_CUR);
w_position += w_length;
}
}
}
log_mesg(2, 0, 0, fs_opt.debug, "write a clean log\n");
log_length = 1 * 1024 * 1024;
logstart = XFS_FSB_TO_DADDR(mp, mp->m_sb.sb_logstart) << BBSHIFT;
logstart_pos = rounddown(logstart, (xfs_off_t)log_length);
if (logstart % log_length) { /* unaligned */
sk = lseek(source_fd, logstart_pos, SEEK_SET);
current_block = (sk/source_blocksize);
block_count = (log_length/source_blocksize);
set_bitmap(bitmap, sk, log_length);
log_mesg(2, 0, 0, fs_opt.debug, "read log start from %llu(%i) %i(%i)\n", sk, current_block, log_length, block_count);
sk = lseek(source_fd, log_length, SEEK_CUR);
}
logend = XFS_FSB_TO_DADDR(mp, mp->m_sb.sb_logstart) << BBSHIFT;
logend += XFS_FSB_TO_B(mp, mp->m_sb.sb_logblocks);
logend_pos = rounddown(logend, (xfs_off_t)log_length);
if (logend % log_length) { /* unaligned */
sk = lseek(source_fd, logend_pos, SEEK_SET);
current_block = (sk/source_blocksize);
block_count = (log_length/source_blocksize);
set_bitmap(bitmap, sk, log_length);
log_mesg(2, 0, 0, fs_opt.debug, "read log end from %llu(%i) %i(%i)\n", sk, current_block, log_length, block_count);
sk = lseek(source_fd, log_length, SEEK_CUR);
}
log_mesg(2, 0, 0, fs_opt.debug, "write a clean log done\n");
prog_cur_block = image_hdr.totalblock/num_ags*(agno+1)-1;
update_pui(&prog, prog_cur_block, prog_cur_block, 0);
}
for(current_block = 0; current_block <= image_hdr.totalblock; current_block++){
if(pc_test_bit(current_block, bitmap))
bused++;
else
bfree++;
}
log_mesg(0, 0, 0, fs_opt.debug, "bused = %lli, bfree = %lli\n", bused, bfree);
fs_close();
update_pui(&prog, 1, 1, 1);
}
/*
* build both the agf and the agfl for an agno given both
* btree cursors.
*
* XXX: yet more common code that can be shared with mkfs/growfs.
*/
static void
build_agf_agfl(xfs_mount_t *mp,
xfs_agnumber_t agno,
bt_status_t *bno_bt,
bt_status_t *bcnt_bt,
xfs_extlen_t freeblks, /* # free blocks in tree */
int lostblocks) /* # blocks that will be lost */
{
extent_tree_node_t *ext_ptr;
xfs_buf_t *agf_buf, *agfl_buf;
int i;
int j;
xfs_agfl_t *agfl;
xfs_agf_t *agf;
__be32 *freelist;
agf_buf = libxfs_getbuf(mp->m_dev,
XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
mp->m_sb.sb_sectsize/BBSIZE);
agf_buf->b_ops = &xfs_agf_buf_ops;
agf = XFS_BUF_TO_AGF(agf_buf);
memset(agf, 0, mp->m_sb.sb_sectsize);
#ifdef XR_BLD_FREE_TRACE
fprintf(stderr, "agf = 0x%p, agf_buf->b_addr = 0x%p\n",
agf, agf_buf->b_addr);
#endif
/*
* set up fixed part of agf
*/
agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
agf->agf_seqno = cpu_to_be32(agno);
if (agno < mp->m_sb.sb_agcount - 1)
agf->agf_length = cpu_to_be32(mp->m_sb.sb_agblocks);
else
agf->agf_length = cpu_to_be32(mp->m_sb.sb_dblocks -
(xfs_rfsblock_t) mp->m_sb.sb_agblocks * agno);
agf->agf_roots[XFS_BTNUM_BNO] = cpu_to_be32(bno_bt->root);
agf->agf_levels[XFS_BTNUM_BNO] = cpu_to_be32(bno_bt->num_levels);
agf->agf_roots[XFS_BTNUM_CNT] = cpu_to_be32(bcnt_bt->root);
agf->agf_levels[XFS_BTNUM_CNT] = cpu_to_be32(bcnt_bt->num_levels);
agf->agf_freeblks = cpu_to_be32(freeblks);
/*
* Count and record the number of btree blocks consumed if required.
*/
if (xfs_sb_version_haslazysbcount(&mp->m_sb)) {
/*
* Don't count the root blocks as they are already
* accounted for.
*/
agf->agf_btreeblks = cpu_to_be32(
(bno_bt->num_tot_blocks - bno_bt->num_free_blocks) +
(bcnt_bt->num_tot_blocks - bcnt_bt->num_free_blocks) -
2);
#ifdef XR_BLD_FREE_TRACE
fprintf(stderr, "agf->agf_btreeblks = %u\n",
be32_to_cpu(agf->agf_btreeblks));
#endif
}
#ifdef XR_BLD_FREE_TRACE
fprintf(stderr, "bno root = %u, bcnt root = %u, indices = %u %u\n",
be32_to_cpu(agf->agf_roots[XFS_BTNUM_BNO]),
be32_to_cpu(agf->agf_roots[XFS_BTNUM_CNT]),
XFS_BTNUM_BNO,
XFS_BTNUM_CNT);
#endif
if (xfs_sb_version_hascrc(&mp->m_sb))
platform_uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid);
/* initialise the AGFL, then fill it if there are blocks left over. */
agfl_buf = libxfs_getbuf(mp->m_dev,
XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)),
mp->m_sb.sb_sectsize/BBSIZE);
agfl_buf->b_ops = &xfs_agfl_buf_ops;
agfl = XFS_BUF_TO_AGFL(agfl_buf);
/* setting to 0xff results in initialisation to NULLAGBLOCK */
memset(agfl, 0xff, mp->m_sb.sb_sectsize);
if (xfs_sb_version_hascrc(&mp->m_sb)) {
agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC);
agfl->agfl_seqno = cpu_to_be32(agno);
platform_uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid);
for (i = 0; i < XFS_AGFL_SIZE(mp); i++)
agfl->agfl_bno[i] = cpu_to_be32(NULLAGBLOCK);
}
freelist = XFS_BUF_TO_AGFL_BNO(mp, agfl_buf);
/*
* do we have left-over blocks in the btree cursors that should
* be used to fill the AGFL?
*/
if (bno_bt->num_free_blocks > 0 || bcnt_bt->num_free_blocks > 0) {
/*
* yes, now grab as many blocks as we can
*/
i = j = 0;
while (bno_bt->num_free_blocks > 0 && i < XFS_AGFL_SIZE(mp)) {
freelist[i] = cpu_to_be32(
get_next_blockaddr(agno, 0, bno_bt));
i++;
}
while (bcnt_bt->num_free_blocks > 0 && i < XFS_AGFL_SIZE(mp)) {
freelist[i] = cpu_to_be32(
get_next_blockaddr(agno, 0, bcnt_bt));
i++;
}
/*
* now throw the rest of the blocks away and complain
*/
while (bno_bt->num_free_blocks > 0) {
(void) get_next_blockaddr(agno, 0, bno_bt);
j++;
}
while (bcnt_bt->num_free_blocks > 0) {
(void) get_next_blockaddr(agno, 0, bcnt_bt);
j++;
}
if (j > 0) {
if (j == lostblocks)
do_warn(_("lost %d blocks in ag %u\n"),
j, agno);
else
do_warn(_("thought we were going to lose %d "
"blocks in ag %u, actually lost "
"%d\n"),
lostblocks, j, agno);
}
agf->agf_flfirst = 0;
agf->agf_fllast = cpu_to_be32(i - 1);
agf->agf_flcount = cpu_to_be32(i);
#ifdef XR_BLD_FREE_TRACE
fprintf(stderr, "writing agfl for ag %u\n", agno);
#endif
} else {
agf->agf_flfirst = 0;
agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1);
agf->agf_flcount = 0;
}
libxfs_writebuf(agfl_buf, 0);
ext_ptr = findbiggest_bcnt_extent(agno);
agf->agf_longest = cpu_to_be32((ext_ptr != NULL) ?
ext_ptr->ex_blockcount : 0);
ASSERT(be32_to_cpu(agf->agf_roots[XFS_BTNUM_BNOi]) !=
be32_to_cpu(agf->agf_roots[XFS_BTNUM_CNTi]));
libxfs_writebuf(agf_buf, 0);
/*
* now fix up the free list appropriately
* XXX: code lifted from mkfs, should be shared.
*/
{
xfs_alloc_arg_t args;
xfs_trans_t *tp;
struct xfs_trans_res tres = {0};
int error;
memset(&args, 0, sizeof(args));
args.tp = tp = libxfs_trans_alloc(mp, 0);
args.mp = mp;
args.agno = agno;
args.alignment = 1;
args.pag = xfs_perag_get(mp,agno);
libxfs_trans_reserve(tp, &tres,
xfs_alloc_min_freelist(mp, args.pag), 0);
error = libxfs_alloc_fix_freelist(&args, 0);
xfs_perag_put(args.pag);
if (error) {
do_error(_("failed to fix AGFL on AG %d, error %d\n"),
agno, error);
}
libxfs_trans_commit(tp);
}
#ifdef XR_BLD_FREE_TRACE
fprintf(stderr, "wrote agf for ag %u\n", agno);
#endif
}
