NAME

lfs_bmapv — retrieve disk addresses for arrays of blocks

LIBRARY

Standard C Library (libc, -lc)

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.