patch-2.1.112 linux/fs/ufs/util.c

• Lines: 199
• Date: Sun Jul 26 01:20:22 1998
• Orig file: v2.1.111/linux/fs/ufs/util.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.111/linux/fs/ufs/util.c linux/fs/ufs/util.c
@@ -0,0 +1,197 @@
+/*
+ *  linux/fs/ufs/util.c
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles Uiversity, Faculty of Mathematics and Physics
+ */
+ 
+#include <linux/malloc.h>
+#include <linux/locks.h>
+
+#include "swab.h"
+#include "util.h"
+
+#undef UFS_UTILS_DEBUG
+
+#ifdef UFS_UTILS_DEBUG
+#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
+#else
+#define UFSD(x)
+#endif
+
+
+struct ufs_buffer_head * _ubh_bread_ (struct ufs_sb_private_info * uspi,
+	kdev_t dev, unsigned fragment, unsigned size)
+{
+	struct ufs_buffer_head * ubh;
+	unsigned i, j, count;
+	if (size & ~uspi->s_fmask)
+		return NULL;
+	count = size >> uspi->s_fshift;
+	if (count > UFS_MAXFRAG)
+		return NULL;
+	ubh = (struct ufs_buffer_head *)
+		kmalloc (sizeof (struct ufs_buffer_head), GFP_KERNEL);
+	if (!ubh)
+		return NULL;
+	ubh->fragment = fragment;
+	ubh->count = count;
+	for (i = 0; i < count; i++)
+		if (!(ubh->bh[i] = bread (dev, fragment + i, uspi->s_fsize)))
+			goto failed;
+	for (; i < UFS_MAXFRAG; i++)
+		ubh->bh[i] = NULL;
+	return ubh;
+failed:
+	for (j = 0; j < i; j++)
+		brelse (ubh->bh[j]);
+	return NULL;
+}
+
+struct ufs_buffer_head * _ubh_bread2_ (struct ufs_sb_private_info * uspi,
+	kdev_t dev, unsigned fragment, unsigned size)
+{
+	unsigned i, j, count;
+	if (size & ~uspi->s_fmask)
+		return NULL;
+	count = size >> uspi->s_fshift;
+	if (count <= 0 || count > UFS_MAXFRAG)
+		return NULL;
+	USPI_UBH->fragment = fragment;
+	USPI_UBH->count = count;
+	for (i = 0; i < count; i++)
+		if (!(USPI_UBH->bh[i] = bread (dev, fragment + i, uspi->s_fsize)))
+			goto failed;
+	for (; i < UFS_MAXFRAG; i++)
+		USPI_UBH->bh[i] = NULL;
+	return USPI_UBH;
+failed:
+	for (j = 0; j < i; j++)
+		brelse (USPI_UBH->bh[j]);
+	return NULL;
+}
+
+void ubh_brelse (struct ufs_buffer_head * ubh)
+{
+	unsigned i;
+	if (!ubh)
+		return;
+	for (i = 0; i < ubh->count; i++)
+		brelse (ubh->bh[i]);
+	kfree (ubh);
+}
+
+void ubh_brelse2 (struct ufs_buffer_head * ubh)
+{
+	unsigned i;
+	if (!ubh)
+		return;
+	for ( i = 0; i < ubh->count; i++ ) {
+		brelse (ubh->bh[i]);
+		ubh->bh[i] = NULL;
+	}
+}
+
+void ubh_mark_buffer_dirty (struct ufs_buffer_head * ubh, int flag)
+{
+	unsigned i;
+	if (!ubh)
+		return;
+	for ( i = 0; i < ubh->count; i++ )
+		mark_buffer_dirty (ubh->bh[i], flag);
+}
+
+void ubh_mark_buffer_uptodate (struct ufs_buffer_head * ubh, int flag)
+{
+	unsigned i;
+	if (!ubh)
+		return;
+	for ( i = 0; i < ubh->count; i++ )
+		mark_buffer_uptodate (ubh->bh[i], flag);
+}
+
+void ubh_ll_rw_block (int rw, unsigned nr, struct ufs_buffer_head * ubh[])
+{
+	unsigned i;
+	if (!ubh)
+		return;
+	for ( i = 0; i < nr; i++ )
+		ll_rw_block (rw, ubh[i]->count, ubh[i]->bh);
+}
+
+void ubh_wait_on_buffer (struct ufs_buffer_head * ubh)
+{
+	unsigned i;
+	if (!ubh)
+		return;
+	for ( i = 0; i < ubh->count; i++ )
+		wait_on_buffer (ubh->bh[i]);
+}
+
+unsigned ubh_max_bcount (struct ufs_buffer_head * ubh)
+{
+	unsigned i;
+	unsigned max = 0;
+	if (!ubh)
+		return 0;
+	for ( i = 0; i < ubh->count; i++ ) 
+		if ( ubh->bh[i]->b_count > max )
+			max = ubh->bh[i]->b_count;
+	if (max == 0)
+		printk("Je cosi shnileho v kralovstvi Danskem!\n");
+	return max;
+}
+
+void ubh_bforget (struct ufs_buffer_head * ubh)
+{
+	unsigned i;
+	if (!ubh) 
+		return;
+	for ( i = 0; i < ubh->count; i++ ) if ( ubh->bh[i] ) 
+		bforget (ubh->bh[i]);
+}
+ 
+int ubh_buffer_dirty (struct ufs_buffer_head * ubh)
+{
+	unsigned i;
+	unsigned result = 0;
+	if (!ubh)
+		return 0;
+	for ( i = 0; i < ubh->count; i++ )
+		result |= buffer_dirty(ubh->bh[i]);
+	return result;
+}
+
+void _ubh_ubhcpymem_(struct ufs_sb_private_info * uspi, 
+	unsigned char * mem, struct ufs_buffer_head * ubh, unsigned size)
+{
+	unsigned len, bhno;
+	if ( size > (ubh->count << uspi->s_fshift) )
+		size = ubh->count << uspi->s_fshift;
+	bhno = 0;
+	while ( size ) {
+		len = min (size, uspi->s_fsize);
+		memcpy (mem, ubh->bh[bhno]->b_data, len);
+		mem += uspi->s_fsize;
+		size -= len;
+		bhno++;
+	}
+}
+
+void _ubh_memcpyubh_(struct ufs_sb_private_info * uspi, 
+	struct ufs_buffer_head * ubh, unsigned char * mem, unsigned size)
+{
+	unsigned len, bhno;
+	if ( size > (ubh->count << uspi->s_fshift) )
+		size = ubh->count << uspi->s_fshift;
+	bhno = 0;
+	while ( size ) {
+		len = min (size, uspi->s_fsize);
+		memcpy (ubh->bh[bhno]->b_data, mem, len);
+		mem += uspi->s_fsize;
+		size -= len;
+		bhno++;
+	}
+}
+		
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