Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 175 insertions, 0 deletions

diff --git a/fs/hpfs/buffer.c b/fs/hpfs/buffer.c
new file mode 100644
index 000000000000..2807aa833e62
--- /dev/null
+++ b/fs/hpfs/buffer.c
@@ -0,0 +1,175 @@
+/*
+ *  linux/fs/hpfs/buffer.c
+ *
+ *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ *  general buffer i/o
+ */
+
+#include "hpfs_fn.h"
+
+void hpfs_lock_creation(struct super_block *s)
+{
+#ifdef DEBUG_LOCKS
+	printk("lock creation\n");
+#endif
+	down(&hpfs_sb(s)->hpfs_creation_de);
+}
+
+void hpfs_unlock_creation(struct super_block *s)
+{
+#ifdef DEBUG_LOCKS
+	printk("unlock creation\n");
+#endif
+	up(&hpfs_sb(s)->hpfs_creation_de);
+}
+
+/* Map a sector into a buffer and return pointers to it and to the buffer. */
+
+void *hpfs_map_sector(struct super_block *s, unsigned secno, struct buffer_head **bhp,
+		 int ahead)
+{
+	struct buffer_head *bh;
+
+	cond_resched();
+
+	*bhp = bh = sb_bread(s, secno);
+	if (bh != NULL)
+		return bh->b_data;
+	else {
+		printk("HPFS: hpfs_map_sector: read error\n");
+		return NULL;
+	}
+}
+
+/* Like hpfs_map_sector but don't read anything */
+
+void *hpfs_get_sector(struct super_block *s, unsigned secno, struct buffer_head **bhp)
+{
+	struct buffer_head *bh;
+	/*return hpfs_map_sector(s, secno, bhp, 0);*/
+
+	cond_resched();
+
+	if ((*bhp = bh = sb_getblk(s, secno)) != NULL) {
+		if (!buffer_uptodate(bh)) wait_on_buffer(bh);
+		set_buffer_uptodate(bh);
+		return bh->b_data;
+	} else {
+		printk("HPFS: hpfs_get_sector: getblk failed\n");
+		return NULL;
+	}
+}
+
+/* Map 4 sectors into a 4buffer and return pointers to it and to the buffer. */
+
+void *hpfs_map_4sectors(struct super_block *s, unsigned secno, struct quad_buffer_head *qbh,
+		   int ahead)
+{
+	struct buffer_head *bh;
+	char *data;
+
+	cond_resched();
+
+	if (secno & 3) {
+		printk("HPFS: hpfs_map_4sectors: unaligned read\n");
+		return NULL;
+	}
+
+	qbh->data = data = (char *)kmalloc(2048, GFP_NOFS);
+	if (!data) {
+		printk("HPFS: hpfs_map_4sectors: out of memory\n");
+		goto bail;
+	}
+
+	qbh->bh[0] = bh = sb_bread(s, secno);
+	if (!bh)
+		goto bail0;
+	memcpy(data, bh->b_data, 512);
+
+	qbh->bh[1] = bh = sb_bread(s, secno + 1);
+	if (!bh)
+		goto bail1;
+	memcpy(data + 512, bh->b_data, 512);
+
+	qbh->bh[2] = bh = sb_bread(s, secno + 2);
+	if (!bh)
+		goto bail2;
+	memcpy(data + 2 * 512, bh->b_data, 512);
+
+	qbh->bh[3] = bh = sb_bread(s, secno + 3);
+	if (!bh)
+		goto bail3;
+	memcpy(data + 3 * 512, bh->b_data, 512);
+
+	return data;
+
+ bail3:
+	brelse(qbh->bh[2]);
+ bail2:
+	brelse(qbh->bh[1]);
+ bail1:
+	brelse(qbh->bh[0]);
+ bail0:
+	kfree(data);
+	printk("HPFS: hpfs_map_4sectors: read error\n");
+ bail:
+	return NULL;
+}
+
+/* Don't read sectors */
+
+void *hpfs_get_4sectors(struct super_block *s, unsigned secno,
+                          struct quad_buffer_head *qbh)
+{
+	cond_resched();
+
+	if (secno & 3) {
+		printk("HPFS: hpfs_get_4sectors: unaligned read\n");
+		return NULL;
+	}
+
+	/*return hpfs_map_4sectors(s, secno, qbh, 0);*/
+	if (!(qbh->data = kmalloc(2048, GFP_NOFS))) {
+		printk("HPFS: hpfs_get_4sectors: out of memory\n");
+		return NULL;
+	}
+	if (!(hpfs_get_sector(s, secno, &qbh->bh[0]))) goto bail0;
+	if (!(hpfs_get_sector(s, secno + 1, &qbh->bh[1]))) goto bail1;
+	if (!(hpfs_get_sector(s, secno + 2, &qbh->bh[2]))) goto bail2;
+	if (!(hpfs_get_sector(s, secno + 3, &qbh->bh[3]))) goto bail3;
+	memcpy(qbh->data, qbh->bh[0]->b_data, 512);
+	memcpy(qbh->data + 512, qbh->bh[1]->b_data, 512);
+	memcpy(qbh->data + 2*512, qbh->bh[2]->b_data, 512);
+	memcpy(qbh->data + 3*512, qbh->bh[3]->b_data, 512);
+	return qbh->data;
+
+	bail3:	brelse(qbh->bh[2]);
+	bail2:	brelse(qbh->bh[1]);
+	bail1:	brelse(qbh->bh[0]);
+	bail0:
+	return NULL;
+}
+	
+
+void hpfs_brelse4(struct quad_buffer_head *qbh)
+{
+	brelse(qbh->bh[3]);
+	brelse(qbh->bh[2]);
+	brelse(qbh->bh[1]);
+	brelse(qbh->bh[0]);
+	kfree(qbh->data);
+}	
+
+void hpfs_mark_4buffers_dirty(struct quad_buffer_head *qbh)
+{
+	PRINTK(("hpfs_mark_4buffers_dirty\n"));
+	memcpy(qbh->bh[0]->b_data, qbh->data, 512);
+	memcpy(qbh->bh[1]->b_data, qbh->data + 512, 512);
+	memcpy(qbh->bh[2]->b_data, qbh->data + 2 * 512, 512);
+	memcpy(qbh->bh[3]->b_data, qbh->data + 3 * 512, 512);
+	mark_buffer_dirty(qbh->bh[0]);
+	mark_buffer_dirty(qbh->bh[1]);
+	mark_buffer_dirty(qbh->bh[2]);
+	mark_buffer_dirty(qbh->bh[3]);
+}