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LFS_BMAPV(2) System Calls Manual LFS_BMAPV(2)

lfs_bmapv — retrieve disk addresses for arrays of blocks

library “libc”

#include <sys/types.h>
#include <ufs/lfs/lfs.h>

int
lfs_bmapv(fsid_t *fsidp, BLOCK_INFO *blkiov, int blkcnt);

() 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;

lfs_bmapv() returns 0 on success, or -1 on error.

An error return from lfs_bmapv() indicates:

[]
fsidp points outside the process's allocated address space.
[]
*fsidp does not specify a valid file system.

lfs_markv(2), lfs_segclean(2), lfs_segwait(2), lfs_cleanerd(8)

The lfs_bmapv() function call appeared in 4.4BSD.

May 23, 2000 NetBSD-9.2