NAME
lfs_bmapv
—
retrieve disk addresses for arrays of
blocks
LIBRARY
library “libc”
SYNOPSIS
#include
<sys/types.h>
#include <ufs/lfs/lfs.h>
int
lfs_bmapv
(fsid_t
*fsidp, BLOCK_INFO
*blkiov, int
blkcnt);
DESCRIPTION
lfs_bmapv
()
fills in the bi_daddr field for every block listed in the block array
blkiov with the disk address corresponding to the
logical block bi_lbn of the file with inode
bi_inode. If bi_lbn is
LFS_UNUSED_LBN, the disk location of the inode block containing the file's
inode will be returned in bi_daddr instead.
The fsidp argument contains the id of the file system to which the inodes and blocks belong. The blkiov argument is an array of BLOCK_INFO structures (see below). The blkcnt argument determines the size of the blkiov array.
typedef struct block_info { ino_t bi_inode; /* inode # */ ufs_daddr_t bi_lbn; /* logical block w/in file */ ufs_daddr_t bi_daddr; /* disk address of block */ time_t bi_segcreate; /* origin segment create time */ int bi_version; /* file version number */ void *bi_bp; /* data buffer */ int bi_size; /* size of the block (if fragment) */ } BLOCK_INFO;
RETURN VALUES
lfs_bmapv
() returns 0 on success, or -1 on
error.
ERRORS
An error return from lfs_bmapv
()
indicates:
- [
EFAULT
] - fsidp points outside the process's allocated address space.
- [
EINVAL
] - *fsidp does not specify a valid file system.
SEE ALSO
lfs_markv(2), lfs_segclean(2), lfs_segwait(2), lfs_cleanerd(8)
HISTORY
The lfs_bmapv
() function call appeared in
4.4BSD.