/*
* 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);
}
int
main(int argc, char **argv)
{
int i, j;
int howfar = 0;
int open_flags;
xfs_off_t pos, end_pos;
size_t length;
int c, first_residue, tmp_residue;
__uint64_t size, sizeb;
__uint64_t numblocks = 0;
int wblocks = 0;
int num_threads = 0;
struct dioattr d;
int wbuf_size;
int wbuf_align;
int wbuf_miniosize;
int source_is_file = 0;
int buffered_output = 0;
int duplicate = 0;
uint btree_levels, current_level;
ag_header_t ag_hdr;
xfs_mount_t *mp;
xfs_mount_t mbuf;
xfs_buf_t *sbp;
xfs_sb_t *sb;
xfs_agnumber_t num_ags, agno;
xfs_agblock_t bno;
xfs_daddr_t begin, next_begin, ag_begin, new_begin, ag_end;
struct xfs_btree_block *block;
xfs_alloc_ptr_t *ptr;
xfs_alloc_rec_t *rec_ptr;
extern char *optarg;
extern int optind;
libxfs_init_t xargs;
thread_args *tcarg;
struct stat64 statbuf;
progname = basename(argv[0]);
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
while ((c = getopt(argc, argv, "bdL:V")) != EOF) {
switch (c) {
case 'b':
buffered_output = 1;
break;
case 'd':
duplicate = 1;
break;
case 'L':
logfile_name = optarg;
break;
case 'V':
printf(_("%s version %s\n"), progname, VERSION);
exit(0);
case '?':
usage();
}
}
if (argc - optind < 2)
usage();
if (logfile_name) {
logfd = open(logfile_name, O_CREAT|O_WRONLY|O_EXCL, 0600);
} else {
logfile_name = LOGFILE_NAME;
logfd = mkstemp(logfile_name);
}
if (logfd < 0) {
fprintf(stderr, _("%s: couldn't open log file \"%s\"\n"),
progname, logfile_name);
perror(_("Aborting XFS copy - reason"));
exit(1);
}
if ((logerr = fdopen(logfd, "w")) == NULL) {
fprintf(stderr, _("%s: couldn't set up logfile stream\n"),
progname);
perror(_("Aborting XFS copy - reason"));
exit(1);
}
source_name = argv[optind];
source_fd = -1;
optind++;
num_targets = argc - optind;
if ((target = malloc(sizeof(target_control) * num_targets)) == NULL) {
do_log(_("Couldn't allocate target array\n"));
die_perror();
}
for (i = 0; optind < argc; i++, optind++) {
target[i].name = argv[optind];
target[i].fd = -1;
target[i].position = -1;
target[i].state = INACTIVE;
target[i].error = 0;
target[i].err_type = 0;
}
parent_pid = getpid();
if (atexit(killall)) {
do_log(_("%s: couldn't register atexit function.\n"), progname);
die_perror();
}
/* open up source -- is it a file? */
open_flags = O_RDONLY;
if ((source_fd = open(source_name, open_flags)) < 0) {
do_log(_("%s: couldn't open source \"%s\"\n"),
progname, source_name);
die_perror();
}
if (fstat64(source_fd, &statbuf) < 0) {
do_log(_("%s: couldn't stat source \"%s\"\n"),
progname, source_name);
die_perror();
}
if (S_ISREG(statbuf.st_mode))
source_is_file = 1;
if (source_is_file && platform_test_xfs_fd(source_fd)) {
if (fcntl(source_fd, F_SETFL, open_flags | O_DIRECT) < 0) {
do_log(_("%s: Cannot set direct I/O flag on \"%s\".\n"),
progname, source_name);
die_perror();
}
if (xfsctl(source_name, source_fd, XFS_IOC_DIOINFO, &d) < 0) {
do_log(_("%s: xfsctl on file \"%s\" failed.\n"),
progname, source_name);
die_perror();
}
wbuf_align = d.d_mem;
wbuf_size = MIN(d.d_maxiosz, 1 * 1024 * 1024);
wbuf_miniosize = d.d_miniosz;
} else {
/* set arbitrary I/O params, miniosize at least 1 disk block */
wbuf_align = getpagesize();
wbuf_size = 1 * 1024 * 1024;
wbuf_miniosize = -1; /* set after mounting source fs */
}
if (!source_is_file) {
/*
* check to make sure a filesystem isn't mounted
* on the device
*/
if (platform_check_ismounted(source_name, NULL, &statbuf, 0)) {
do_log(
_("%s: Warning -- a filesystem is mounted on the source device.\n"),
progname);
do_log(
_("\t\tGenerated copies may be corrupt unless the source is\n"));
do_log(
_("\t\tunmounted or mounted read-only. Copy proceeding...\n"));
}
}
/* prepare the libxfs_init structure */
memset(&xargs, 0, sizeof(xargs));
xargs.isdirect = LIBXFS_DIRECT;
xargs.isreadonly = LIBXFS_ISREADONLY;
if (source_is_file) {
xargs.dname = source_name;
xargs.disfile = 1;
} else
xargs.volname = source_name;
if (!libxfs_init(&xargs)) {
do_log(_("%s: couldn't initialize XFS library\n"
"%s: Aborting.\n"), progname, progname);
exit(1);
}
/* prepare the mount structure */
sbp = libxfs_readbuf(xargs.ddev, XFS_SB_DADDR, 1, 0);
memset(&mbuf, 0, sizeof(xfs_mount_t));
sb = &mbuf.m_sb;
libxfs_sb_from_disk(sb, XFS_BUF_TO_SBP(sbp));
mp = libxfs_mount(&mbuf, sb, xargs.ddev, xargs.logdev, xargs.rtdev, 1);
if (mp == NULL) {
do_log(_("%s: %s filesystem failed to initialize\n"
"%s: Aborting.\n"), progname, source_name, progname);
exit(1);
} else if (mp->m_sb.sb_inprogress) {
do_log(_("%s %s filesystem failed to initialize\n"
"%s: Aborting.\n"), progname, source_name, progname);
exit(1);
} else if (mp->m_sb.sb_logstart == 0) {
do_log(_("%s: %s has an external log.\n%s: Aborting.\n"),
progname, source_name, progname);
exit(1);
} else if (mp->m_sb.sb_rextents != 0) {
do_log(_("%s: %s has a real-time section.\n"
"%s: Aborting.\n"), progname, source_name, progname);
exit(1);
}
source_blocksize = mp->m_sb.sb_blocksize;
source_sectorsize = mp->m_sb.sb_sectsize;
if (wbuf_miniosize == -1)
wbuf_miniosize = source_sectorsize;
ASSERT(source_blocksize % source_sectorsize == 0);
ASSERT(source_sectorsize % BBSIZE == 0);
if (source_blocksize > source_sectorsize) {
/* get number of leftover sectors in last block of ag header */
tmp_residue = ((XFS_AGFL_DADDR(mp) + 1) * source_sectorsize)
% source_blocksize;
first_residue = (tmp_residue == 0) ? 0 :
source_blocksize - tmp_residue;
ASSERT(first_residue % source_sectorsize == 0);
} else if (source_blocksize == source_sectorsize) {
first_residue = 0;
} else {
do_log(_("Error: filesystem block size is smaller than the"
" disk sectorsize.\nAborting XFS copy now.\n"));
exit(1);
}
first_agbno = (((XFS_AGFL_DADDR(mp) + 1) * source_sectorsize)
+ first_residue) / source_blocksize;
ASSERT(first_agbno != 0);
ASSERT( ((((XFS_AGFL_DADDR(mp) + 1) * source_sectorsize)
+ first_residue) % source_blocksize) == 0);
/* now open targets */
open_flags = O_RDWR;
for (i = 0; i < num_targets; i++) {
int write_last_block = 0;
if (stat64(target[i].name, &statbuf) < 0) {
/* ok, assume it's a file and create it */
do_out(_("Creating file %s\n"), target[i].name);
open_flags |= O_CREAT;
if (!buffered_output)
open_flags |= O_DIRECT;
write_last_block = 1;
} else if (S_ISREG(statbuf.st_mode)) {
open_flags |= O_TRUNC;
if (!buffered_output)
open_flags |= O_DIRECT;
write_last_block = 1;
} else {
/*
* check to make sure a filesystem isn't mounted
* on the device
*/
if (platform_check_ismounted(target[i].name,
NULL, &statbuf, 0)) {
do_log(_("%s: a filesystem is mounted "
"on target device \"%s\".\n"
"%s cannot copy to mounted filesystems."
" Aborting\n"),
progname, target[i].name, progname);
exit(1);
}
}
target[i].fd = open(target[i].name, open_flags, 0644);
if (target[i].fd < 0) {
do_log(_("%s: couldn't open target \"%s\"\n"),
progname, target[i].name);
die_perror();
}
if (write_last_block) {
/* ensure regular files are correctly sized */
if (ftruncate64(target[i].fd, mp->m_sb.sb_dblocks *
source_blocksize)) {
do_log(_("%s: cannot grow data section.\n"),
progname);
die_perror();
}
if (platform_test_xfs_fd(target[i].fd)) {
if (xfsctl(target[i].name, target[i].fd,
XFS_IOC_DIOINFO, &d) < 0) {
do_log(
_("%s: xfsctl on \"%s\" failed.\n"),
progname, target[i].name);
die_perror();
} else {
wbuf_align = MAX(wbuf_align, d.d_mem);
wbuf_size = MIN(d.d_maxiosz, wbuf_size);
wbuf_miniosize = MAX(d.d_miniosz,
wbuf_miniosize);
}
}
} else {
char *lb[XFS_MAX_SECTORSIZE] = { NULL };
off64_t off;
/* ensure device files are sufficiently large */
off = mp->m_sb.sb_dblocks * source_blocksize;
off -= sizeof(lb);
if (pwrite64(target[i].fd, lb, sizeof(lb), off) < 0) {
do_log(_("%s: failed to write last block\n"),
progname);
do_log(_("\tIs target \"%s\" too small?\n"),
target[i].name);
die_perror();
}
}
}
/* initialize locks and bufs */
if (pthread_mutex_init(&glob_masks.mutex, NULL) != 0) {
do_log(_("Couldn't initialize global thread mask\n"));
die_perror();
}
glob_masks.num_working = 0;
if (wbuf_init(&w_buf, wbuf_size, wbuf_align,
wbuf_miniosize, 0) == NULL) {
do_log(_("Error initializing wbuf 0\n"));
die_perror();
}
wblocks = wbuf_size / BBSIZE;
if (wbuf_init(&btree_buf, MAX(source_blocksize, wbuf_miniosize),
wbuf_align, wbuf_miniosize, 1) == NULL) {
do_log(_("Error initializing btree buf 1\n"));
die_perror();
}
if (pthread_mutex_init(&mainwait,NULL) != 0) {
do_log(_("Error creating first semaphore.\n"));
die_perror();
exit(1);
}
/* need to start out blocking */
pthread_mutex_lock(&mainwait);
/* set up sigchild signal handler */
signal(SIGCHLD, handler);
signal_maskfunc(SIGCHLD, SIG_BLOCK);
/* make children */
if ((targ = malloc(num_targets * sizeof(thread_args))) == NULL) {
do_log(_("Couldn't malloc space for thread args\n"));
die_perror();
exit(1);
}
for (i = 0, tcarg = targ; i < num_targets; i++, tcarg++) {
if (!duplicate)
platform_uuid_generate(&tcarg->uuid);
else
platform_uuid_copy(&tcarg->uuid, &mp->m_sb.sb_uuid);
if (pthread_mutex_init(&tcarg->wait, NULL) != 0) {
do_log(_("Error creating thread mutex %d\n"), i);
die_perror();
exit(1);
}
/* need to start out blocking */
pthread_mutex_lock(&tcarg->wait);
}
for (i = 0, tcarg = targ; i < num_targets; i++, tcarg++) {
tcarg->id = i;
tcarg->fd = target[i].fd;
target[i].state = ACTIVE;
num_threads++;
if (pthread_create(&target[i].pid, NULL,
begin_reader, (void *)tcarg)) {
do_log(_("Error creating thread for target %d\n"), i);
die_perror();
}
}
ASSERT(num_targets == num_threads);
/* set up statistics */
num_ags = mp->m_sb.sb_agcount;
init_bar(mp->m_sb.sb_blocksize / BBSIZE
* ((__uint64_t)mp->m_sb.sb_dblocks
- (__uint64_t)mp->m_sb.sb_fdblocks + 10 * num_ags));
kids = num_targets;
block = (struct xfs_btree_block *) btree_buf.data;
for (agno = 0; agno < num_ags && kids > 0; agno++) {
/* read in first blocks of the ag */
read_ag_header(source_fd, agno, &w_buf, &ag_hdr, mp,
source_blocksize, source_sectorsize);
/* set the in_progress bit for the first AG */
if (agno == 0)
ag_hdr.xfs_sb->sb_inprogress = 1;
/* save what we need (agf) in the btree buffer */
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;
/* write the ag header out */
write_wbuf();
/* 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 */
ASSERT(current_level < btree_levels);
current_level++;
btree_buf.position = pos = (xfs_off_t)
XFS_AGB_TO_DADDR(mp,agno,bno) << BBSHIFT;
btree_buf.length = source_blocksize;
read_wbuf(source_fd, &btree_buf, mp);
block = (struct xfs_btree_block *)
((char *)btree_buf.data +
pos - btree_buf.position);
ASSERT(be32_to_cpu(block->bb_magic) == XFS_ABTB_MAGIC);
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]);
}
/* align first data copy but don't overwrite ag header */
pos = w_buf.position >> BBSHIFT;
length = w_buf.length >> BBSHIFT;
next_begin = pos + length;
ag_begin = next_begin;
ASSERT(w_buf.position % source_sectorsize == 0);
/* handle the rest of the ag */
for (;;) {
if (be16_to_cpu(block->bb_level) != 0) {
do_log(
_("WARNING: source filesystem inconsistent.\n"));
do_log(
_(" A leaf btree rec isn't a leaf. Aborting now.\n"));
exit(1);
}
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
*/
sizeb = XFS_AGB_TO_DADDR(mp, agno,
be32_to_cpu(rec_ptr->ar_startblock)) -
begin;
size = roundup(sizeb <<BBSHIFT, wbuf_miniosize);
if (size > 0) {
/* copy extent */
w_buf.position = (xfs_off_t)
begin << BBSHIFT;
while (size > 0) {
/*
* let lower layer do alignment
*/
if (size > w_buf.size) {
w_buf.length = w_buf.size;
size -= w_buf.size;
sizeb -= wblocks;
numblocks += wblocks;
} else {
w_buf.length = size;
numblocks += sizeb;
size = 0;
}
read_wbuf(source_fd, &w_buf, mp);
write_wbuf();
w_buf.position += w_buf.length;
howfar = bump_bar(
howfar, numblocks);
}
}
/* 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,
w_buf.min_io_size >> BBSHIFT);
}
if (be32_to_cpu(block->bb_u.s.bb_rightsib) == NULLAGBLOCK)
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);
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, wbuf_miniosize);
if (size > 0) {
/* copy extent */
w_buf.position = (xfs_off_t) begin << BBSHIFT;
while (size > 0) {
/*
* let lower layer do alignment
*/
if (size > w_buf.size) {
w_buf.length = w_buf.size;
size -= w_buf.size;
sizeb -= wblocks;
numblocks += wblocks;
} else {
w_buf.length = size;
numblocks += sizeb;
size = 0;
}
read_wbuf(source_fd, &w_buf, mp);
write_wbuf();
w_buf.position += w_buf.length;
howfar = bump_bar(howfar, numblocks);
}
}
}
}
if (kids > 0) {
if (!duplicate) {
/* write a clean log using the specified UUID */
for (j = 0, tcarg = targ; j < num_targets; j++) {
w_buf.owner = tcarg;
w_buf.length = rounddown(w_buf.size,
w_buf.min_io_size);
pos = write_log_header(
source_fd, &w_buf, mp);
end_pos = write_log_trailer(
source_fd, &w_buf, mp);
w_buf.position = pos;
memset(w_buf.data, 0, w_buf.length);
while (w_buf.position < end_pos) {
do_write(tcarg);
w_buf.position += w_buf.length;
}
tcarg++;
}
} else {
num_ags = 1;
}
/* reread and rewrite superblocks (UUID and in-progress) */
/* [backwards, so inprogress bit only updated when done] */
for (i = num_ags - 1; i >= 0; i--) {
read_ag_header(source_fd, i, &w_buf, &ag_hdr, mp,
source_blocksize, source_sectorsize);
if (i == 0)
ag_hdr.xfs_sb->sb_inprogress = 0;
/* do each thread in turn, each has its own UUID */
for (j = 0, tcarg = targ; j < num_targets; j++) {
platform_uuid_copy(&ag_hdr.xfs_sb->sb_uuid,
&tcarg->uuid);
do_write(tcarg);
tcarg++;
}
}
bump_bar(100, 0);
}
check_errors();
killall();
pthread_exit(NULL);
/*NOTREACHED*/
return 0;
}
/*
* 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
}
