2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
191 lines
7 KiB
C
191 lines
7 KiB
C
/* fslib.c - routines needed by fs and fs utilities */
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#include <minix/config.h> /* for unused stuff in <minix/type.h> :-( */
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#include <minix/ansi.h>
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#include <limits.h>
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#include <dirent.h>
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#include <sys/types.h>
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#include <minix/const.h>
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#include <minix/type.h> /* for unshort :-( */
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#include "mfs/const.h" /* depends of -I flag in Makefile */
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#include "mfs/type.h" /* ditto */
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#include "mfs/inode.h" /* ditto */
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#include "mfs/super.h"
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#include <minix/fslib.h>
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/* The next routine is copied from fsck.c and mkfs.c... (Re)define some
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* things for consistency. Some things should be done better.
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*/
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/* Convert from bit count to a block count. The usual expression
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*
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* (nr_bits + (1 << BITMAPSHIFT) - 1) >> BITMAPSHIFT
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*
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* doesn't work because of overflow.
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*
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* Other overflow bugs, such as the expression for N_ILIST overflowing when
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* s_inodes is just over V*_INODES_PER_BLOCK less than the maximum+1, are not
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* fixed yet, because that number of inodes is silly.
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*/
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/* The above comment doesn't all apply now bit_t is long. Overflow is now
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* unlikely, but negative bit counts are now possible (though unlikely)
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* and give silly results.
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*/
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PUBLIC int bitmapsize(nr_bits, block_size)
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bit_t nr_bits;
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int block_size;
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{
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int nr_blocks;
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nr_blocks = (int) (nr_bits / FS_BITS_PER_BLOCK(block_size));
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if (((bit_t) nr_blocks * FS_BITS_PER_BLOCK(block_size)) < nr_bits) ++nr_blocks;
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return(nr_blocks);
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}
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/*===========================================================================*
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* conv2 *
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*===========================================================================*/
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PUBLIC unsigned conv2(norm, w)
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int norm; /* TRUE if no swap, FALSE for byte swap */
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int w; /* promotion of 16-bit word to be swapped */
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{
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/* Possibly swap a 16-bit word between 8086 and 68000 byte order. */
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if (norm) return( (unsigned) w & 0xFFFF);
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return( ((w&BYTE) << 8) | ( (w>>8) & BYTE));
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}
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/*===========================================================================*
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* conv4 *
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*===========================================================================*/
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PUBLIC long conv4(norm, x)
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int norm; /* TRUE if no swap, FALSE for byte swap */
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long x; /* 32-bit long to be byte swapped */
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{
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/* Possibly swap a 32-bit long between 8086 and 68000 byte order. */
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unsigned lo, hi;
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long l;
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if (norm) return(x); /* byte order was already ok */
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lo = conv2(FALSE, (int) x & 0xFFFF); /* low-order half, byte swapped */
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hi = conv2(FALSE, (int) (x>>16) & 0xFFFF); /* high-order half, swapped */
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l = ( (long) lo <<16) | hi;
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return(l);
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}
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/*===========================================================================*
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* conv_inode *
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*===========================================================================*/
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PUBLIC void conv_inode(rip, dip, dip2, rw_flag, magic)
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register struct inode *rip; /* pointer to the in-core inode struct */
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register d1_inode *dip; /* pointer to the V1 on-disk inode struct */
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register d2_inode *dip2; /* pointer to the V2 on-disk inode struct */
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int rw_flag; /* READING or WRITING */
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int magic; /* magic number of file system */
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{
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/* Copy the inode from the disk block to the in-core table or vice versa.
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* If the fourth parameter below is FALSE, the bytes are swapped.
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*/
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switch (magic) {
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case SUPER_MAGIC: old_icopy(rip, dip, rw_flag, TRUE); break;
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case SUPER_REV: old_icopy(rip, dip, rw_flag, FALSE); break;
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case SUPER_V3:
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case SUPER_V2: new_icopy(rip, dip2, rw_flag, TRUE); break;
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case SUPER_V2_REV: new_icopy(rip, dip2, rw_flag, FALSE); break;
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}
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}
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/*===========================================================================*
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* old_icopy *
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*===========================================================================*/
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PUBLIC void old_icopy(rip, dip, direction, norm)
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register struct inode *rip; /* pointer to the in-core inode struct */
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register d1_inode *dip; /* pointer to the d1_inode inode struct */
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int direction; /* READING (from disk) or WRITING (to disk) */
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int norm; /* TRUE = do not swap bytes; FALSE = swap */
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{
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/* 4 different on-disk inode layouts are supported, one for each combination
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* of V1.x/V2.x * bytes-swapped/not-swapped. When an inode is read or written
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* this routine handles the conversions so that the information in the inode
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* table is independent of the disk structure from which the inode came.
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* The old_icopy routine copies to and from V1 disks.
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*/
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int i;
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if (direction == READING) {
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/* Copy V1.x inode to the in-core table, swapping bytes if need be. */
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rip->i_mode = conv2(norm, dip->d1_mode);
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rip->i_uid = conv2(norm,dip->d1_uid );
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rip->i_size = conv4(norm,dip->d1_size);
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rip->i_mtime = conv4(norm,dip->d1_mtime);
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rip->i_atime = 0;
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rip->i_ctime = 0;
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rip->i_nlinks = (nlink_t) dip->d1_nlinks; /* 1 char */
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rip->i_gid = (gid_t) dip->d1_gid; /* 1 char */
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rip->i_ndzones = V1_NR_DZONES;
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rip->i_nindirs = V1_INDIRECTS;
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for (i = 0; i < V1_NR_TZONES; i++)
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rip->i_zone[i] = conv2(norm, (int) dip->d1_zone[i]);
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} else {
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/* Copying V1.x inode to disk from the in-core table. */
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dip->d1_mode = conv2(norm,rip->i_mode);
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dip->d1_uid = conv2(norm,rip->i_uid );
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dip->d1_size = conv4(norm,rip->i_size);
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dip->d1_mtime = conv4(norm,rip->i_mtime);
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dip->d1_nlinks = (nlink_t) rip->i_nlinks; /* 1 char */
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dip->d1_gid = (gid_t) rip->i_gid; /* 1 char */
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for (i = 0; i < V1_NR_TZONES; i++)
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dip->d1_zone[i] = conv2(norm, (int) rip->i_zone[i]);
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}
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}
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/*===========================================================================*
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* new_icopy *
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*===========================================================================*/
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PUBLIC void new_icopy(rip, dip, direction, norm)
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register struct inode *rip; /* pointer to the in-core inode struct */
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register d2_inode *dip; /* pointer to the d2_inode struct */
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int direction; /* READING (from disk) or WRITING (to disk) */
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int norm; /* TRUE = do not swap bytes; FALSE = swap */
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{
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/* Same as old_icopy, but to/from V2 disk layout. */
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int i;
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if (direction == READING) {
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/* Copy V2.x inode to the in-core table, swapping bytes if need be. */
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rip->i_mode = conv2(norm,dip->d2_mode);
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rip->i_uid = conv4(norm,dip->d2_uid );
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rip->i_nlinks = conv2(norm,(int) dip->d2_nlinks);
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rip->i_gid = conv4(norm,(int) dip->d2_gid );
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rip->i_size = conv4(norm,dip->d2_size);
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rip->i_atime = conv4(norm,dip->d2_atime);
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rip->i_ctime = conv4(norm,dip->d2_ctime);
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rip->i_mtime = conv4(norm,dip->d2_mtime);
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rip->i_ndzones = V2_NR_DZONES;
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rip->i_nindirs = V2_INDIRECTS(rip->i_sp->s_block_size);
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for (i = 0; i < V2_NR_TZONES; i++)
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rip->i_zone[i] = conv4(norm, (long) dip->d2_zone[i]);
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} else {
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/* Copying V2.x inode to disk from the in-core table. */
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dip->d2_mode = conv2(norm,rip->i_mode);
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dip->d2_uid = conv4(norm,rip->i_uid );
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dip->d2_nlinks = conv2(norm,rip->i_nlinks);
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dip->d2_gid = conv4(norm,rip->i_gid );
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dip->d2_size = conv4(norm,rip->i_size);
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dip->d2_atime = conv4(norm,rip->i_atime);
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dip->d2_ctime = conv4(norm,rip->i_ctime);
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dip->d2_mtime = conv4(norm,rip->i_mtime);
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for (i = 0; i < V2_NR_TZONES; i++)
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dip->d2_zone[i] = conv4(norm, (long) rip->i_zone[i]);
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}
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}
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