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.Dd May 23, 2000 .Dt LFS_MARKV 2 .Os .Sh NAME .Nm lfs_markv .Nd rewrite disk blocks to new disk locations .Sh LIBRARY .Lb libc .Sh SYNOPSIS n sys/types.h n ufs/lfs/lfs.h .Ft int .Fn lfs_markv "fsid_t *fsidp" "BLOCK_INFO *blkiov" "int blkcnt" .Sh DESCRIPTION .Fn lfs_markv rewrites the blocks specified in .Fa 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 .Fa bi_segcreate . If .Fa bi_daddr is not the correct current address for logical block .Fa bi_lbn of the file with inode number .Fa bi_inode , or if the file's version number does not match .Fa bi_version , the block will not be written to disk, but no error will be returned.
p The .Fa fsidp argument contains the id of the file system to which the inodes and blocks belong. The .Fa bi_bp field contains .Fa bi_size bytes of data to be written into the appropriate block. If .Fa bi_lbn is specified as LFS_UNUSED_LBN, the inode itself will be rewritten.
p The .Fa blkiov argument is an array of BLOCK_INFO structures (see below). The .Fa blkcnt argument determines the size of the .Fa blkiov array. d -literal 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; .Ed .Sh RETURN VALUES .Fn lfs_markv returns 0 on success, or -1 on error. .Sh ERRORS An error return from .Fn lfs_markv indicates: l -tag -width Er t Bq Er EFAULT .Fa fsidp points outside the process's allocated address space. t Bq Er EINVAL .Fa *fsidp does not specify a valid file system. t Bq Er EBUSY One or more of the inodes whose blocks were to be written was locked, and its blocks were not rewritten. .El .Sh SEE ALSO .Xr lfs_segclean 2 , .Xr lfs_segwait 2 , .Xr lfs_cleanerd 8 .Sh HISTORY The .Fn lfs_markv function call appeared in x 4.4 . .Sh BUGS The functionality of .Fn lfs_markv does not really belong in user space. Among other things it could be used to work around the SF_IMMUTABLE and SF_APPEND file flags (see .Xr chflags 2 ) .
Indexes created Mon Sep 22 10:09:38 GMT 2025