lfs_markv() rewrites the blocks specified in
blkiov to new disk locations, for the purposes of grouping them next to one another, or to move them out of a segment to clean it. All fields of the BLOCK_INFO structure must be filled in, except for
bi_segcreate. If
bi_daddr is not the correct current address for logical block
bi_lbn of the file with inode number
bi_inode, or if the file's version number does not match
bi_version, the block will not be written to disk, but no error will be returned.
The
fsidp argument contains the id of the filesystem to which the inodes and blocks belong. The
bi_bp field contains
bi_size bytes of data to be written into the appropriate block. If
bi_lbn is specified as LFS_UNUSED_LBN, the inode itself will be rewritten.
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;