Ejemplo n.º 1
0
/*
 * Attempt to expand the size of a directory
 */
static int
expanddir(struct ufs1_dinode *dp, char *name)
{
	ufs_daddr_t lastbn, newblk;
	struct bufarea *bp;
	char *cp, firstblk[DIRBLKSIZ];

	lastbn = lblkno(&sblock, dp->di_size);
	if (lastbn >= NDADDR - 1 || dp->di_db[lastbn] == 0 || dp->di_size == 0)
		return (0);
	if ((newblk = allocblk(sblock.fs_frag)) == 0)
		return (0);
	dp->di_db[lastbn + 1] = dp->di_db[lastbn];
	dp->di_db[lastbn] = newblk;
	dp->di_size += sblock.fs_bsize;
	dp->di_blocks += btodb(sblock.fs_bsize);
	bp = getdirblk(dp->di_db[lastbn + 1],
		(long)dblksize(&sblock, dp, lastbn + 1));
	if (bp->b_errs)
		goto bad;
	memmove(firstblk, bp->b_un.b_buf, DIRBLKSIZ);
	bp = getdirblk(newblk, sblock.fs_bsize);
	if (bp->b_errs)
		goto bad;
	memmove(bp->b_un.b_buf, firstblk, DIRBLKSIZ);
	for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
	     cp < &bp->b_un.b_buf[sblock.fs_bsize];
	     cp += DIRBLKSIZ)
		memmove(cp, &emptydir, sizeof emptydir);
	dirty(bp);
	bp = getdirblk(dp->di_db[lastbn + 1],
		(long)dblksize(&sblock, dp, lastbn + 1));
	if (bp->b_errs)
		goto bad;
	memmove(bp->b_un.b_buf, &emptydir, sizeof emptydir);
	pwarn("NO SPACE LEFT IN %s", name);
	if (preen)
		printf(" (EXPANDED)\n");
	else if (reply("EXPAND") == 0)
		goto bad;
	dirty(bp);
	inodirty();
	return (1);
bad:
	dp->di_db[lastbn] = dp->di_db[lastbn + 1];
	dp->di_db[lastbn + 1] = 0;
	dp->di_size -= sblock.fs_bsize;
	dp->di_blocks -= btodb(sblock.fs_bsize);
	freeblk(newblk, sblock.fs_frag);
	return (0);
}
Ejemplo n.º 2
0
/*
 * get next entry in a directory.
 */
struct direct *
dreaddir(struct dirstuff *dirp)
{
	struct direct *dp;
	daddr_t lbn, d;

	for (;;) {

		if (dirp->loc >= (int)dirp->ip->di_size)
			return (NULL);
		if (blkoff(&sblock, dirp->loc) == 0) {

			lbn = lblkno(&sblock, dirp->loc);

			d = bmap(lbn);
			if (d == 0)
				return (NULL);

			bread(fsbtodb(&sblock, d), dirp->dbuf,
			    (int)dblksize(&sblock, dirp->ip, (int)lbn));

		}
		dp = (struct direct *)
		    (dirp->dbuf + blkoff(&sblock, dirp->loc));
		dirp->loc += dp->d_reclen;
		if (dp->d_ino == 0) {
			continue;
		}
		return (dp);
	}
}
Ejemplo n.º 3
0
/*
 * Read a portion of a file into an internal buffer.
 * Return the location in the buffer and the amount in the buffer.
 */
static int
buf_read_file(struct open_file *f, char **buf_p, size_t *size_p)
{
	struct file *fp = (struct file *)f->f_fsdata;
	struct fs *fs = fp->f_fs;
	long off;
	indp_t file_block;
	size_t block_size;
	int rc;

	off = ufs_blkoff(fs, fp->f_seekp);
	file_block = ufs_lblkno(fs, fp->f_seekp);
#ifdef LIBSA_LFS
	block_size = dblksize(fs, &fp->f_di, file_block);
#else
	block_size = ffs_sblksize(fs, (int64_t)fp->f_di.di_size, file_block);
#endif

	if (file_block != fp->f_buf_blkno) {
		indp_t disk_block = 0; /* XXX: gcc */
		rc = block_map(f, file_block, &disk_block);
		if (rc)
			return rc;

		if (disk_block == 0) {
			memset(fp->f_buf, 0, block_size);
			fp->f_buf_size = block_size;
		} else {
			twiddle();
			rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
				FSBTODB(fs, disk_block),
				block_size, fp->f_buf, &fp->f_buf_size);
			if (rc)
				return rc;
		}

		fp->f_buf_blkno = file_block;
	}

	/*
	 * Return address of byte in buffer corresponding to
	 * offset, and size of remainder of buffer after that
	 * byte.
	 */
	*buf_p = fp->f_buf + off;
	*size_p = block_size - off;

	/*
	 * But truncate buffer at end of file.
	 */
	if (*size_p > fp->f_di.di_size - fp->f_seekp)
		*size_p = fp->f_di.di_size - fp->f_seekp;

	return 0;
}
Ejemplo n.º 4
0
/*
 * Read a portion of a file into an internal buffer.  Return
 * the location in the buffer and the amount in the buffer.
 *
 * Parameters:
 *	buf_p:	out
 *	size_p:	out
 */
static int
buf_read_file(struct open_file *f, char **buf_p, size_t *size_p)
{
	struct file *fp = (struct file *)f->f_fsdata;
	struct fs *fs = fp->f_fs;
	long off;
	daddr_t file_block;
	daddr_t	disk_block;
	size_t block_size;
	int rc;

	off = blkoff(fs, fp->f_seekp);
	file_block = lblkno(fs, fp->f_seekp);
	block_size = dblksize(fs, &fp->f_di, file_block);

	if (file_block != fp->f_buf_blkno) {
		rc = block_map(f, file_block, &disk_block);
		if (rc)
			return (rc);

		if (fp->f_buf == NULL)
			fp->f_buf = malloc(fs->fs_bsize);

		if (disk_block == 0) {
			bzero(fp->f_buf, block_size);
			fp->f_buf_size = block_size;
		} else {
			twiddle();
			rc = (f->f_dev->dv_strategy)(f->f_devdata, F_READ,
				fsbtodb(fs, disk_block),
				block_size, fp->f_buf, &fp->f_buf_size);
			if (rc)
				return (rc);
		}

		fp->f_buf_blkno = file_block;
	}

	/*
	 * Return address of byte in buffer corresponding to
	 * offset, and size of remainder of buffer after that
	 * byte.
	 */
	*buf_p = fp->f_buf + off;
	*size_p = block_size - off;

	/*
	 * But truncate buffer at end of file.
	 */
	if (*size_p > fp->f_di.di_size - fp->f_seekp)
		*size_p = fp->f_di.di_size - fp->f_seekp;

	return (0);
}
Ejemplo n.º 5
0
/*
 * Dump pass 2.
 *
 * Scan each directory on the filesystem to see if it has any modified
 * files in it. If it does, and has not already been added to the dump
 * list (because it was itself modified), then add it. If a directory
 * has not been modified itself, contains no modified files and has no
 * subdirectories, then it can be deleted from the dump list and from
 * the list of directories. By deleting it from the list of directories,
 * its parent may now qualify for the same treatment on this or a later
 * pass using this algorithm.
 */
int
mapdirs(ufs1_ino_t maxino, long *tape_size)
{
	struct	ufs1_dinode *dp;
	int isdir, nodump;
	unsigned int i;
	char *map;
	ufs1_ino_t ino;
	struct ufs1_dinode di;
	long filesize;
	int ret, change = 0;

	isdir = 0;		/* XXX just to get gcc to shut up */
	for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
		if (((ino - 1) % NBBY) == 0)	/* map is offset by 1 */
			isdir = *map++;
		else
			isdir >>= 1;
		/*
		 * If a directory has been removed from usedinomap, it
		 * either has the nodump flag set, or has inherited
		 * it.  Although a directory can't be in dumpinomap if
		 * it isn't in usedinomap, we have to go through it to
		 * propagate the nodump flag.
		 */
		nodump = !nonodump && (TSTINO(ino, usedinomap) == 0);
		if ((isdir & 1) == 0 || (TSTINO(ino, dumpinomap) && !nodump))
			continue;
		dp = getino(ino);
		di = *dp;	/* inode buf may change in searchdir(). */
		filesize = di.di_size;
		for (ret = 0, i = 0; filesize > 0 && i < NDADDR; i++) {
			if (di.di_db[i] != 0) {
				ret |= searchdir(ino, di.di_db[i],
					(long)dblksize(sblock, &di, i),
					filesize, tape_size, nodump);
			}
			if (ret & HASDUMPEDFILE)
				filesize = 0;
			else
				filesize -= sblock->fs_bsize;
		}
		for (i = 0; filesize > 0 && i < NIADDR; i++) {
			if (di.di_ib[i] == 0)
				continue;
			ret |= dirindir(ino, di.di_ib[i], i, &filesize,
			    tape_size, nodump);
		}
		if (ret & HASDUMPEDFILE) {
			SETINO(ino, dumpinomap);
			*tape_size += blockest(&di);
			change = 1;
			continue;
		}
		if (nodump) {
			if (ret & HASSUBDIRS)
				change = 1;	/* subdirs inherit nodump */
			CLRINO(ino, dumpdirmap);
		} else if ((ret & HASSUBDIRS) == 0)
			if (!TSTINO(ino, dumpinomap)) {
				CLRINO(ino, dumpdirmap);
				change = 1;
			}
	}
	return (change);
}