From 1b25b3144ca2d02ccd920ddf1e752f3ca9a8098f Mon Sep 17 00:00:00 2001
From: wangdi <wangdi>
Date: Tue, 27 May 2003 11:51:42 +0000
Subject: [PATCH] rename ext3-san-2.4.20-hp.patch to ext3-san-2.4.20.patch

---
 .../kernel_patches/patches/ext3-san-2.4.20.patch   | 117 +++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 lustre/kernel_patches/patches/ext3-san-2.4.20.patch

diff --git a/lustre/kernel_patches/patches/ext3-san-2.4.20.patch b/lustre/kernel_patches/patches/ext3-san-2.4.20.patch
new file mode 100644
index 0000000..148f4e3
--- /dev/null
+++ b/lustre/kernel_patches/patches/ext3-san-2.4.20.patch
@@ -0,0 +1,117 @@
+ fs/ext3/ext3-exports.c |    9 ++++-
+ fs/ext3/inode.c        |   81 +++++++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 89 insertions(+), 1 deletion(-)
+
+--- linux/fs/ext3/inode.c~ext3-san-2.4.20-hp	Tue Apr 29 11:01:52 2003
++++ linux-mmonroe/fs/ext3/inode.c	Tue Apr 29 11:01:53 2003
+@@ -2734,3 +2734,84 @@ int ext3_change_inode_journal_flag(struc
+  * here, in ext3_aops_journal_start() to ensure that the forthcoming "see if we
+  * need to extend" test in ext3_prepare_write() succeeds.  
+  */
++
++/* for each block: 1 ind + 1 dind + 1 tind
++ * for each block: 3 bitmap blocks
++ * for each block: 3 group descriptor blocks
++ * i inode block
++ * 1 superblock
++ * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quote files
++ * ((1+1+1) * 3 * nblocks) + 1 + 1 + 2 * EXT3_SINGLEDATA_TRANS_BLOCKS
++ *
++ * XXX assuming:
++ * (1) fs logic block size == page size
++ * (2) ext3 in writeback mode
++ */
++static inline int ext3_san_write_trans_blocks(int nblocks)
++{
++	int ret;
++	
++	ret = (1 + 1 + 1) * 3 * nblocks + 1 + 1;
++
++#ifdef CONFIG_QUOTA
++	ret += 2 * EXT3_SINGLEDATA_TRANS_BLOCKS;
++#endif
++
++	return ret;
++}
++
++/* Alloc blocks for an inode, while don't create any buffer/page
++ * for data I/O; set the inode size if file is extended.
++ *
++ * @inode:    target inode
++ * @blocks:   array of logic block number
++ * @nblocks:  how many blocks need be alloced
++ * @newsize:  new filesize we should set
++ *
++ * return:    0 success, otherwise failed
++ *            (*blocks) contains physical block number alloced
++ *
++ * XXX this assume the fs block size == page size
++ */
++int ext3_prep_san_write(struct inode *inode, long *blocks,
++			int nblocks, loff_t newsize)
++{
++	handle_t *handle;
++	struct buffer_head bh_tmp;
++	int needed_blocks;
++	int i, ret = 0, ret2;
++
++	needed_blocks = ext3_san_write_trans_blocks(nblocks);
++
++	lock_kernel();
++	handle = ext3_journal_start(inode, needed_blocks);
++	if (IS_ERR(handle)) {
++		unlock_kernel();
++		return PTR_ERR(handle);
++	}
++	unlock_kernel();
++
++	/* alloc blocks one by one */
++	for (i = 0; i < nblocks; i++) {
++		ret = ext3_get_block_handle(handle, inode, blocks[i],
++						&bh_tmp, 1);
++		if (ret)
++			break;
++
++		blocks[i] = bh_tmp.b_blocknr;
++	}
++
++	/* set inode size if needed */
++	if (!ret && (newsize > inode->i_size)) {
++		inode->i_size = newsize;
++		ext3_mark_inode_dirty(handle, inode);
++	}
++
++	lock_kernel();
++	ret2 = ext3_journal_stop(handle, inode);
++	unlock_kernel();
++
++	if (!ret)
++		ret = ret2;
++	return ret;
++}
+--- linux/fs/ext3/ext3-exports.c~ext3-san-2.4.20-hp	Tue Apr 29 11:01:51 2003
++++ linux-mmonroe/fs/ext3/ext3-exports.c	Tue Apr 29 11:07:19 2003
+@@ -1,9 +1,15 @@
+ #include <linux/config.h>
+ #include <linux/module.h>
+-#include <linux/ext3_fs.h>
++#include <linux/fs.h>
++#include <linux/locks.h>
++#include <linux/slab.h>
+ #include <linux/ext3_jbd.h>
++#include <linux/ext3_fs.h>
+ #include <linux/ext3_xattr.h>
+ 
++int ext3_prep_san_write(struct inode *inode, long *blocks,
++	                int nblocks, loff_t newsize);
++
+ EXPORT_SYMBOL(ext3_force_commit);
+ EXPORT_SYMBOL(ext3_bread);
+ EXPORT_SYMBOL(ext3_xattr_register);
+@@ -11,3 +17,4 @@ EXPORT_SYMBOL(ext3_xattr_unregister);
+ EXPORT_SYMBOL(ext3_xattr_get);
+ EXPORT_SYMBOL(ext3_xattr_list);
+ EXPORT_SYMBOL(ext3_xattr_set);
++EXPORT_SYMBOL(ext3_prep_san_write);
+
+_
-- 
1.8.3.1