C++ do_warn函数代码示例

/*
 * Set the he range [start, stop) in the directory freemap.
 *
 * Returns 1 if there is a conflict or 0 if everything's good.
 *
 * Within a char, the lowest bit of the char represents the byte with
 * the smallest address
 */
static int
set_da_freemap(xfs_mount_t *mp, da_freemap_t *map, int start, int stop)
{
	const da_freemap_t mask = 0x1;
	int i;

	if (start > stop)  {
		/*
		 * allow == relation since [x, x) claims 1 byte
		 */
		do_warn(_("bad range claimed [%d, %d) in da block\n"),
			start, stop);
		return(1);
	}

	if (stop > mp->m_sb.sb_blocksize)  {
		do_warn(
	_("byte range end [%d %d) in da block larger than blocksize %d\n"),
			start, stop, mp->m_sb.sb_blocksize);
		return(1);
	}

	for (i = start; i < stop; i ++)  {
		if (map[i / NBBY] & (mask << i % NBBY))  {
			do_warn(_("multiply claimed byte %d in da block\n"), i);
			return(1);
		}
		map[i / NBBY] |= (mask << i % NBBY);
	}

	return(0);
}

void
no_sb(void)
{
	do_warn(_("Sorry, could not find valid secondary superblock\n"));
	do_warn(_("Exiting now.\n"));
	exit(1);
}

void
read_wbuf(int fd, wbuf *buf, xfs_mount_t *mp)
{
	int		res = 0;
	xfs_off_t	lres = 0;
	xfs_off_t	newpos;
	size_t		diff;

	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;
	}

	if (source_position != buf->position)  {
		lres = lseek64(fd, buf->position, SEEK_SET);
		if (lres < 0LL)  {
			do_warn(_("%s:  lseek64 failure at offset %lld\n"),
				progname, source_position);
			die_perror();
		}
		source_position = buf->position;
	}

	ASSERT(source_position % source_sectorsize == 0);

	/* 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);

	if (buf->length > buf->size)  {
		do_warn(_("assert error:  buf->length = %d, buf->size = %d\n"),
			buf->length, buf->size);
		killall();
		abort();
	}

	if ((res = read(fd, buf->data, buf->length)) < 0)  {
		do_warn(_("%s:  read failure at offset %lld\n"),
				progname, source_position);
		die_perror();
	}

	if (res < buf->length &&
	    source_position + res == mp->m_sb.sb_dblocks * source_blocksize)
		res = buf->length;
	else
		ASSERT(res == buf->length);
	source_position += res;
	buf->length = res;
}

static int
process_leaf_attr_local(
	struct xfs_mount	*mp,
	xfs_attr_leafblock_t	*leaf,
	int			i,
	xfs_attr_leaf_entry_t	*entry,
	xfs_dahash_t		last_hashval,
	xfs_dablk_t		da_bno,
	xfs_ino_t		ino)
{
	xfs_attr_leaf_name_local_t *local;

	local = xfs_attr3_leaf_name_local(leaf, i);
	if (local->namelen == 0 || namecheck((char *)&local->nameval[0],
							local->namelen)) {
		do_warn(
	_("attribute entry %d in attr block %u, inode %" PRIu64 " has bad name (namelen = %d)\n"),
			i, da_bno, ino, local->namelen);
		return -1;
	}

	/* Check on the hash value. Checking order of values
	 * is not necessary, since one wrong clears the whole
	 * fork. If the ordering's wrong, it's caught here or
	 * the kernel code has a bug with transaction logging
	 * or attributes itself. Being paranoid, let's check
	 * ordering anyway in case both the name value and the
	 * hashvalue were wrong but matched. Unlikely, however.
	 */
	if (be32_to_cpu(entry->hashval) != libxfs_da_hashname(
				&local->nameval[0], local->namelen) ||
				be32_to_cpu(entry->hashval) < last_hashval) {
		do_warn(
	_("bad hashvalue for attribute entry %d in attr block %u, inode %" PRIu64 "\n"),
			i, da_bno, ino);
		return -1;
	}

	/* Only check values for root security attributes */
	if (entry->flags & XFS_ATTR_ROOT) {
		if (valuecheck(mp, (char *)&local->nameval[0], NULL,
				local->namelen, be16_to_cpu(local->valuelen))) {
			do_warn(
	_("bad security value for attribute entry %d in attr block %u, inode %" PRIu64 "\n"),
				i, da_bno, ino);
			return -1;
		}
	}
	return xfs_attr_leaf_entsize_local(local->namelen,
						be16_to_cpu(local->valuelen));
}

/* This routine brings in blocks from disk one by one and assembles them
 * in the value buffer. If get_bmapi gets smarter later to return an extent
 * or list of extents, that would be great. For now, we don't expect too
 * many blocks per remote value, so one by one is sufficient.
 */
static int
rmtval_get(xfs_mount_t *mp, xfs_ino_t ino, blkmap_t *blkmap,
		xfs_dablk_t blocknum, int valuelen, char* value)
{
	xfs_fsblock_t	bno;
	xfs_buf_t	*bp;
	int		clearit = 0, i = 0, length = 0, amountdone = 0;
	int		hdrsize = 0;

	if (xfs_sb_version_hascrc(&mp->m_sb))
		hdrsize = sizeof(struct xfs_attr3_rmt_hdr);

	/* ASSUMPTION: valuelen is a valid number, so use it for looping */
	/* Note that valuelen is not a multiple of blocksize */
	while (amountdone < valuelen) {
		bno = blkmap_get(blkmap, blocknum + i);
		if (bno == NULLFSBLOCK) {
			do_warn(
	_("remote block for attributes of inode %" PRIu64 " is missing\n"), ino);
			clearit = 1;
			break;
		}
		bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, bno),
				    XFS_FSB_TO_BB(mp, 1), 0,
				    &xfs_attr3_rmt_buf_ops);
		if (!bp) {
			do_warn(
	_("can't read remote block for attributes of inode %" PRIu64 "\n"), ino);
			clearit = 1;
			break;
		}

		if (bp->b_error == -EFSBADCRC || bp->b_error == -EFSCORRUPTED) {
			do_warn(
	_("Corrupt remote block for attributes of inode %" PRIu64 "\n"), ino);
			clearit = 1;
			break;
		}

		ASSERT(mp->m_sb.sb_blocksize == XFS_BUF_COUNT(bp));

		length = MIN(XFS_BUF_COUNT(bp) - hdrsize, valuelen - amountdone);
		memmove(value, bp->b_addr + hdrsize, length);
		amountdone += length;
		value += length;
		i++;
		libxfs_putbuf(bp);
	}
	return (clearit);
}

int
verify_set_agheader(xfs_mount_t *mp, xfs_buf_t *sbuf, xfs_sb_t *sb,
	xfs_agf_t *agf, xfs_agi_t *agi, xfs_agnumber_t i)
{
	int rval = 0;
	int status = XR_OK;
	int status_sb = XR_OK;

	status = verify_sb(sb, (i == 0));

	if (status != XR_OK)  {
		do_warn(_("bad on-disk superblock %d - %s\n"),
			i, err_string(status));
	}

	status_sb = compare_sb(mp, sb);

	if (status_sb != XR_OK)  {
		do_warn(_("primary/secondary superblock %d conflict - %s\n"),
			i, err_string(status_sb));
	}

	if (status != XR_OK || status_sb != XR_OK)  {
		if (!no_modify)  {
			*sb = mp->m_sb;

			/*
			 * clear the more transient fields
			 */
			sb->sb_inprogress = 1;

			sb->sb_icount = 0;
			sb->sb_ifree = 0;
			sb->sb_fdblocks = 0;
			sb->sb_frextents = 0;

			sb->sb_qflags = 0;
		}

		rval |= XR_AG_SB;
	}

	rval |= secondary_sb_wack(mp, sbuf, sb, i);

	rval |= verify_set_agf(mp, agf, i);
	rval |= verify_set_agi(mp, agi, i);

	return(rval);
}

/*
 * returns 1 if attributes got cleared
 * and 0 if things are ok.
 */
int
process_attributes(
	xfs_mount_t	*mp,
	xfs_ino_t	ino,
	xfs_dinode_t	*dip,
	blkmap_t	*blkmap,
	int		*repair)  /* returned if we did repair */
{
	int		err;
	__u8		aformat = dip->di_aformat;
#ifdef DEBUG
	xfs_attr_shortform_t *asf;

	asf = (xfs_attr_shortform_t *) XFS_DFORK_APTR(dip);
#endif

	if (aformat == XFS_DINODE_FMT_LOCAL) {
		ASSERT(be16_to_cpu(asf->hdr.totsize) <=
			XFS_DFORK_ASIZE(dip, mp));
		err = process_shortform_attr(mp, ino, dip, repair);
	} else if (aformat == XFS_DINODE_FMT_EXTENTS ||
					aformat == XFS_DINODE_FMT_BTREE)  {
			err = process_longform_attr(mp, ino, dip, blkmap,
				repair);
			/* if err, convert this to shortform and clear it */
			/* if repair and no error, it's taken care of */
	} else  {
		do_warn(_("illegal attribute format %d, ino %" PRIu64 "\n"),
			aformat, ino);
		err = 1;
	}
	return (err);  /* and repair */
}

void warn(const char *file,int line,const char *fmt, ...)
{
  va_list args;
  va_start(args, fmt);
  do_warn("WARNINGS", file, line, fmt, args);
  va_end(args); 
}

void warning(struct position pos, const char * fmt, ...)
{
	va_list args;

	if (Wsparse_error) {
		va_start(args, fmt);
		do_error(pos, fmt, args);
		va_end(args);
		return;
	}

	if (!max_warnings) {
		show_info = 0;
		return;
	}

	if (!--max_warnings) {
		show_info = 0;
		fmt = "too many warnings";
	}

	va_start(args, fmt);
	do_warn("warning: ", pos, fmt, args);
	va_end(args);
}

void warn_doc_error(const char *file,int line,const char *fmt, ...)
{
  va_list args;
  va_start(args, fmt);
  do_warn("WARN_IF_DOC_ERROR", file, line, fmt, args);
  va_end(args);
}

void warn_undoc(const char *file,int line,const char *fmt, ...)
{
  va_list args;
  va_start(args, fmt);
  do_warn("WARN_IF_UNDOCUMENTED", file, line, fmt, args);
  va_end(args);
}

void error_die(struct position pos, const char * fmt, ...)
{
	va_list args;
	va_start(args, fmt);
	do_warn("error: ", pos, fmt, args);
	va_end(args);
	exit(1);
}

void info(struct position pos, const char * fmt, ...)
{
	va_list args;

	if (!show_info)
		return;
	va_start(args, fmt);
	do_warn("", pos, fmt, args);
	va_end(args);
}

static PyObject *
warnings_warn_impl(PyObject *module, PyObject *message, PyObject *category,
                   Py_ssize_t stacklevel, PyObject *source)
/*[clinic end generated code: output=31ed5ab7d8d760b2 input=bfdf5cf99f6c4edd]*/
{
    category = get_category(message, category);
    if (category == NULL)
        return NULL;
    return do_warn(message, category, stacklevel, source);
}

static int
xfs_acl_from_disk(
	struct xfs_mount	*mp,
	struct xfs_icacl	**aclp,
	struct xfs_acl		*dacl)
{
	struct xfs_icacl	*acl;
	struct xfs_icacl_entry	*ace;
	struct xfs_acl_entry	*dace;
	int			count;
	int			i;

	count = be32_to_cpu(dacl->acl_cnt);
	if (count > XFS_ACL_MAX_ENTRIES(mp)) {
		do_warn(_("Too many ACL entries, count %d\n"), count);
		*aclp = NULL;
		return EINVAL;
	}


	acl = malloc(sizeof(struct xfs_icacl) +
		     count * sizeof(struct xfs_icacl_entry));
	if (!acl) {
		do_warn(_("cannot malloc enough for ACL attribute\n"));
		do_warn(_("SKIPPING this ACL\n"));
		*aclp = NULL;
		return ENOMEM;
	}

	acl->acl_cnt = count;
	for (i = 0; i < count; i++) {
		ace = &acl->acl_entry[i];
		dace = &dacl->acl_entry[i];

		ace->ae_tag = be32_to_cpu(dace->ae_tag);
		ace->ae_id = be32_to_cpu(dace->ae_id);
		ace->ae_perm = be16_to_cpu(dace->ae_perm);
	}

	*aclp = acl;
	return 0;
}