lfs_bmapv(2) - NetBSD Manual Pages

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LFS_BMAPV(2)              NetBSD Programmer's Manual              LFS_BMAPV(2)


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 corrseponding to the logical
     block bi_lbn of the file with inode bi_inode.  If bi_lbn is LFS_UN-
     USED_LBN, the disk location of the inode block containing the file's in-
     ode will be returned in bi_daddr instead.

     The fsidp argument contains the id of the filesystem to which the inodes
     and blocks belong.  The blkiov argument is an array of BLOCK_INFO struc-
     tures (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 filesystem.


SEE ALSO

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


HISTORY

     The lfs_bmapv() function call appeared in 4.4BSD.

NetBSD 1.5.2                     May 23, 2000                                1