%patch
-Index: linux-2.6.10/include/linux/ext3_fs.h
+Index: linux-2.6.5-sles9/fs/ext3/extents.c
===================================================================
---- linux-2.6.10.orig/include/linux/ext3_fs.h 2005-04-05 12:26:19.494124024 +0800
-+++ linux-2.6.10/include/linux/ext3_fs.h 2005-04-05 12:26:25.474214912 +0800
-@@ -186,6 +186,7 @@
- #define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
- #define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
- #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
-+#define EXT3_EXTENTS_FL 0x00080000 /* Inode uses extents */
-
- #define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
- #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
-@@ -238,7 +239,9 @@
- #endif
- #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
- #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
--
-+#define EXT3_IOC_GET_EXTENTS _IOR('f', 10, long)
-+#define EXT3_IOC_GET_TREE_DEPTH _IOR('f', 11, long)
-+#define EXT3_IOC_GET_TREE_STATS _IOR('f', 12, long)
- /*
- * Structure of an inode on the disk
- */
-@@ -361,6 +364,8 @@
- #define EXT3_MOUNT_PDIROPS 0x800000/* Parallel dir operations */
- #define EXT3_MOUNT_IOPEN 0x40000 /* Allow access via iopen */
- #define EXT3_MOUNT_IOPEN_NOPRIV 0x80000 /* Make iopen world-readable */
-+#define EXT3_MOUNT_EXTENTS 0x100000 /* Extents support */
-+#define EXT3_MOUNT_EXTDEBUG 0x200000 /* Extents debug */
-
- /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
- #ifndef clear_opt
-@@ -549,11 +554,13 @@
- #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
- #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
- #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
-+#define EXT3_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */
-
- #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
- #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
- EXT3_FEATURE_INCOMPAT_RECOVER| \
-- EXT3_FEATURE_INCOMPAT_META_BG)
-+ EXT3_FEATURE_INCOMPAT_META_BG| \
-+ EXT3_FEATURE_INCOMPAT_EXTENTS)
- #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
- EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
- EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
-@@ -759,6 +766,7 @@
-
-
- /* inode.c */
-+extern int ext3_block_truncate_page(handle_t *, struct page *, struct address_space *, loff_t);
- extern int ext3_forget(handle_t *, int, struct inode *, struct buffer_head *, int);
- extern struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
- extern struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
-@@ -839,6 +847,14 @@
- extern struct inode_operations ext3_symlink_inode_operations;
- extern struct inode_operations ext3_fast_symlink_inode_operations;
-
-+/* extents.c */
-+extern int ext3_ext_writepage_trans_blocks(struct inode *, int);
-+extern int ext3_ext_get_block(handle_t *, struct inode *, long,
-+ struct buffer_head *, int, int);
-+extern void ext3_ext_truncate(struct inode *, struct page *);
-+extern void ext3_ext_init(struct super_block *);
-+extern void ext3_ext_release(struct super_block *);
-+extern void ext3_extents_initialize_blockmap(handle_t *, struct inode *);
-
- #endif /* __KERNEL__ */
-
-Index: linux-2.6.10/include/linux/ext3_fs_i.h
-===================================================================
---- linux-2.6.10.orig/include/linux/ext3_fs_i.h 2005-04-05 12:26:19.377141808 +0800
-+++ linux-2.6.10/include/linux/ext3_fs_i.h 2005-04-05 12:26:25.473215064 +0800
-@@ -134,6 +134,8 @@
- struct dynlock i_htree_lock;
- struct semaphore i_append_sem;
- struct semaphore i_rename_sem;
-+
-+ __u32 i_cached_extent[3];
- };
-
- #endif /* _LINUX_EXT3_FS_I */
-Index: linux-2.6.10/include/linux/ext3_extents.h
-===================================================================
---- linux-2.6.10.orig/include/linux/ext3_extents.h 2005-04-05 19:01:49.158500672 +0800
-+++ linux-2.6.10/include/linux/ext3_extents.h 2005-04-05 12:26:25.476214608 +0800
-@@ -0,0 +1,238 @@
+--- linux-2.6.5-sles9.orig/fs/ext3/extents.c 2005-02-17 22:07:57.023609040 +0300
++++ linux-2.6.5-sles9/fs/ext3/extents.c 2005-02-23 01:02:37.396435640 +0300
+@@ -0,0 +1,2349 @@
+/*
-+ * Copyright (c) 2003, Cluster File Systems, Inc, info@clusterfs.com
++ * Copyright(c) 2003, 2004, 2005, Cluster File Systems, Inc, info@clusterfs.com
+ * Written by Alex Tomas <alex@clusterfs.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-
+ */
+
-+#ifndef _LINUX_EXT3_EXTENTS
-+#define _LINUX_EXT3_EXTENTS
-+
-+/*
-+ * with AGRESSIVE_TEST defined capacity of index/leaf blocks
-+ * become very little, so index split, in-depth growing and
-+ * other hard changes happens much more often
-+ * this is for debug purposes only
-+ */
-+#define AGRESSIVE_TEST_
-+
+/*
-+ * if CHECK_BINSEARCH defined, then results of binary search
-+ * will be checked by linear search
++ * Extents support for EXT3
++ *
++ * TODO:
++ * - ext3_ext_walk_space() sould not use ext3_ext_find_extent()
++ * - ext3_ext_calc_credits() could take 'mergable' into account
++ * - ext3*_error() should be used in some situations
++ * - find_goal() [to be tested and improved]
++ * - smart tree reduction
++ * - arch-independence
++ * common on-disk format for big/little-endian arch
+ */
-+#define CHECK_BINSEARCH_
+
-+/*
-+ * if EXT_DEBUG is defined you can use 'extdebug' mount option
-+ * to get lots of info what's going on
-+ */
-+#define EXT_DEBUG
-+#ifdef EXT_DEBUG
-+#define ext_debug(tree,fmt,a...) \
-+do { \
-+ if (test_opt((tree)->inode->i_sb, EXTDEBUG)) \
-+ printk(fmt, ##a); \
-+} while (0);
-+#else
-+#define ext_debug(tree,fmt,a...)
-+#endif
++#include <linux/module.h>
++#include <linux/fs.h>
++#include <linux/time.h>
++#include <linux/ext3_jbd.h>
++#include <linux/jbd.h>
++#include <linux/smp_lock.h>
++#include <linux/highuid.h>
++#include <linux/pagemap.h>
++#include <linux/quotaops.h>
++#include <linux/string.h>
++#include <linux/slab.h>
++#include <linux/ext3_extents.h>
++#include <asm/uaccess.h>
+
-+/*
-+ * if EXT_STATS is defined then stats numbers are collected
-+ * these number will be displayed at umount time
-+ */
-+#define EXT_STATS_
+
++static inline int ext3_ext_check_header(struct ext3_extent_header *eh)
++{
++ if (eh->eh_magic != EXT3_EXT_MAGIC) {
++ printk(KERN_ERR "EXT3-fs: invalid magic = 0x%x\n",
++ (unsigned)eh->eh_magic);
++ return -EIO;
++ }
++ if (eh->eh_max == 0) {
++ printk(KERN_ERR "EXT3-fs: invalid eh_max = %u\n",
++ (unsigned)eh->eh_max);
++ return -EIO;
++ }
++ if (eh->eh_entries > eh->eh_max) {
++ printk(KERN_ERR "EXT3-fs: invalid eh_entries = %u\n",
++ (unsigned)eh->eh_entries);
++ return -EIO;
++ }
++ return 0;
++}
+
-+#define EXT3_ALLOC_NEEDED 3 /* block bitmap + group desc. + sb */
++static handle_t *ext3_ext_journal_restart(handle_t *handle, int needed)
++{
++ int err;
+
-+/*
-+ * ext3_inode has i_block array (total 60 bytes)
-+ * first 4 bytes are used to store:
-+ * - tree depth (0 mean there is no tree yet. all extents in the inode)
-+ * - number of alive extents in the inode
-+ */
++ if (handle->h_buffer_credits > needed)
++ return handle;
++ if (!ext3_journal_extend(handle, needed))
++ return handle;
++ err = ext3_journal_restart(handle, needed);
++
++ return handle;
++}
+
-+/*
-+ * this is extent on-disk structure
-+ * it's used at the bottom of the tree
-+ */
-+struct ext3_extent {
-+ __u32 ee_block; /* first logical block extent covers */
-+ __u16 ee_len; /* number of blocks covered by extent */
-+ __u16 ee_start_hi; /* high 16 bits of physical block */
-+ __u32 ee_start; /* low 32 bigs of physical block */
-+};
++static int inline
++ext3_ext_get_access_for_root(handle_t *h, struct ext3_extents_tree *tree)
++{
++ if (tree->ops->get_write_access)
++ return tree->ops->get_write_access(h,tree->buffer);
++ else
++ return 0;
++}
+
-+/*
-+ * this is index on-disk structure
-+ * it's used at all the levels, but the bottom
-+ */
-+struct ext3_extent_idx {
-+ __u32 ei_block; /* index covers logical blocks from 'block' */
-+ __u32 ei_leaf; /* pointer to the physical block of the next *
-+ * level. leaf or next index could bet here */
-+ __u16 ei_leaf_hi; /* high 16 bits of physical block */
-+ __u16 ei_unused;
-+};
++static int inline
++ext3_ext_mark_root_dirty(handle_t *h, struct ext3_extents_tree *tree)
++{
++ if (tree->ops->mark_buffer_dirty)
++ return tree->ops->mark_buffer_dirty(h,tree->buffer);
++ else
++ return 0;
++}
+
+/*
-+ * each block (leaves and indexes), even inode-stored has header
++ * could return:
++ * - EROFS
++ * - ENOMEM
+ */
-+struct ext3_extent_header {
-+ __u16 eh_magic; /* probably will support different formats */
-+ __u16 eh_entries; /* number of valid entries */
-+ __u16 eh_max; /* capacity of store in entries */
-+ __u16 eh_depth; /* has tree real underlaying blocks? */
-+ __u32 eh_generation; /* generation of the tree */
-+};
++static int ext3_ext_get_access(handle_t *handle,
++ struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path)
++{
++ int err;
+
-+#define EXT3_EXT_MAGIC 0xf30a
++ if (path->p_bh) {
++ /* path points to block */
++ err = ext3_journal_get_write_access(handle, path->p_bh);
++ } else {
++ /* path points to leaf/index in inode body */
++ err = ext3_ext_get_access_for_root(handle, tree);
++ }
++ return err;
++}
+
+/*
-+ * array of ext3_ext_path contains path to some extent
-+ * creation/lookup routines use it for traversal/splitting/etc
-+ * truncate uses it to simulate recursive walking
++ * could return:
++ * - EROFS
++ * - ENOMEM
++ * - EIO
+ */
-+struct ext3_ext_path {
-+ __u32 p_block;
-+ __u16 p_depth;
-+ struct ext3_extent *p_ext;
-+ struct ext3_extent_idx *p_idx;
-+ struct ext3_extent_header *p_hdr;
-+ struct buffer_head *p_bh;
-+};
++static int ext3_ext_dirty(handle_t *handle, struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path)
++{
++ int err;
++ if (path->p_bh) {
++ /* path points to block */
++ err =ext3_journal_dirty_metadata(handle, path->p_bh);
++ } else {
++ /* path points to leaf/index in inode body */
++ err = ext3_ext_mark_root_dirty(handle, tree);
++ }
++ return err;
++}
+
-+/*
-+ * structure for external API
-+ */
++static int inline
++ext3_ext_new_block(handle_t *handle, struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path, struct ext3_extent *ex,
++ int *err)
++{
++ int goal, depth, newblock;
++ struct inode *inode;
+
-+/*
-+ * ext3_extents_tree is used to pass initial information
-+ * to top-level extents API
-+ */
-+struct ext3_extents_helpers;
-+struct ext3_extents_tree {
-+ struct inode *inode; /* inode which tree belongs to */
-+ void *root; /* ptr to data top of tree resides at */
-+ void *buffer; /* will be passed as arg to ^^ routines */
-+ int buffer_len;
-+ void *private;
-+ struct ext3_extent *cex;/* last found extent */
-+ struct ext3_extents_helpers *ops;
-+};
++ EXT_ASSERT(tree);
++ if (tree->ops->new_block)
++ return tree->ops->new_block(handle, tree, path, ex, err);
+
-+struct ext3_extents_helpers {
-+ int (*get_write_access)(handle_t *h, void *buffer);
-+ int (*mark_buffer_dirty)(handle_t *h, void *buffer);
-+ int (*mergable)(struct ext3_extent *ex1, struct ext3_extent *ex2);
-+ int (*remove_extent_credits)(struct ext3_extents_tree *,
-+ struct ext3_extent *, unsigned long,
-+ unsigned long);
-+ int (*remove_extent)(struct ext3_extents_tree *,
-+ struct ext3_extent *, unsigned long,
-+ unsigned long);
-+ int (*new_block)(handle_t *, struct ext3_extents_tree *,
-+ struct ext3_ext_path *, struct ext3_extent *,
-+ int *);
-+};
++ inode = tree->inode;
++ depth = EXT_DEPTH(tree);
++ if (path && depth > 0) {
++ goal = path[depth-1].p_block;
++ } else {
++ struct ext3_inode_info *ei = EXT3_I(inode);
++ unsigned long bg_start;
++ unsigned long colour;
+
-+/*
-+ * to be called by ext3_ext_walk_space()
-+ * negative retcode - error
-+ * positive retcode - signal for ext3_ext_walk_space(), see below
-+ * callback must return valid extent (passed or newly created)
-+ */
-+typedef int (*ext_prepare_callback)(struct ext3_extents_tree *,
-+ struct ext3_ext_path *,
-+ struct ext3_extent *, int);
++ bg_start = (ei->i_block_group *
++ EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
++ le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
++ colour = (current->pid % 16) *
++ (EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
++ goal = bg_start + colour;
++ }
+
-+#define EXT_CONTINUE 0
-+#define EXT_BREAK 1
-+#define EXT_REPEAT 2
++ newblock = ext3_new_block(handle, inode, goal, err);
++ return newblock;
++}
+
++static inline void ext3_ext_tree_changed(struct ext3_extents_tree *tree)
++{
++ struct ext3_extent_header *neh;
++ neh = EXT_ROOT_HDR(tree);
++ neh->eh_generation++;
++}
+
-+#define EXT_MAX_BLOCK 0xffffffff
-+#define EXT_CACHE_MARK 0xffff
++static inline int ext3_ext_space_block(struct ext3_extents_tree *tree)
++{
++ int size;
+
++ size = (tree->inode->i_sb->s_blocksize -
++ sizeof(struct ext3_extent_header)) /
++ sizeof(struct ext3_extent);
++#ifdef AGRESSIVE_TEST
++ size = 6;
++#endif
++ return size;
++}
+
-+#define EXT_FIRST_EXTENT(__hdr__) \
-+ ((struct ext3_extent *) (((char *) (__hdr__)) + \
-+ sizeof(struct ext3_extent_header)))
-+#define EXT_FIRST_INDEX(__hdr__) \
-+ ((struct ext3_extent_idx *) (((char *) (__hdr__)) + \
-+ sizeof(struct ext3_extent_header)))
-+#define EXT_HAS_FREE_INDEX(__path__) \
-+ ((__path__)->p_hdr->eh_entries < (__path__)->p_hdr->eh_max)
-+#define EXT_LAST_EXTENT(__hdr__) \
-+ (EXT_FIRST_EXTENT((__hdr__)) + (__hdr__)->eh_entries - 1)
-+#define EXT_LAST_INDEX(__hdr__) \
-+ (EXT_FIRST_INDEX((__hdr__)) + (__hdr__)->eh_entries - 1)
-+#define EXT_MAX_EXTENT(__hdr__) \
-+ (EXT_FIRST_EXTENT((__hdr__)) + (__hdr__)->eh_max - 1)
-+#define EXT_MAX_INDEX(__hdr__) \
-+ (EXT_FIRST_INDEX((__hdr__)) + (__hdr__)->eh_max - 1)
++static inline int ext3_ext_space_block_idx(struct ext3_extents_tree *tree)
++{
++ int size;
+
-+#define EXT_ROOT_HDR(tree) \
-+ ((struct ext3_extent_header *) (tree)->root)
-+#define EXT_BLOCK_HDR(bh) \
-+ ((struct ext3_extent_header *) (bh)->b_data)
-+#define EXT_DEPTH(_t_) \
-+ (((struct ext3_extent_header *)((_t_)->root))->eh_depth)
-+#define EXT_GENERATION(_t_) \
-+ (((struct ext3_extent_header *)((_t_)->root))->eh_generation)
++ size = (tree->inode->i_sb->s_blocksize -
++ sizeof(struct ext3_extent_header)) /
++ sizeof(struct ext3_extent_idx);
++#ifdef AGRESSIVE_TEST
++ size = 5;
++#endif
++ return size;
++}
+
++static inline int ext3_ext_space_root(struct ext3_extents_tree *tree)
++{
++ int size;
+
-+#define EXT_ASSERT(__x__) if (!(__x__)) BUG();
++ size = (tree->buffer_len - sizeof(struct ext3_extent_header)) /
++ sizeof(struct ext3_extent);
++#ifdef AGRESSIVE_TEST
++ size = 3;
++#endif
++ return size;
++}
+
++static inline int ext3_ext_space_root_idx(struct ext3_extents_tree *tree)
++{
++ int size;
+
-+/*
-+ * this structure is used to gather extents from the tree via ioctl
-+ */
-+struct ext3_extent_buf {
-+ unsigned long start;
-+ int buflen;
-+ void *buffer;
-+ void *cur;
-+ int err;
-+};
++ size = (tree->buffer_len - sizeof(struct ext3_extent_header)) /
++ sizeof(struct ext3_extent_idx);
++#ifdef AGRESSIVE_TEST
++ size = 4;
++#endif
++ return size;
++}
+
-+/*
-+ * this structure is used to collect stats info about the tree
-+ */
-+struct ext3_extent_tree_stats {
-+ int depth;
-+ int extents_num;
-+ int leaf_num;
-+};
++static void ext3_ext_show_path(struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path)
++{
++#ifdef EXT_DEBUG
++ int k, l = path->p_depth;
+
-+extern int ext3_extent_tree_init(handle_t *, struct ext3_extents_tree *);
-+extern int ext3_ext_calc_credits_for_insert(struct ext3_extents_tree *, struct ext3_ext_path *);
-+extern int ext3_ext_insert_extent(handle_t *, struct ext3_extents_tree *, struct ext3_ext_path *, struct ext3_extent *);
-+extern int ext3_ext_walk_space(struct ext3_extents_tree *, unsigned long, unsigned long, ext_prepare_callback);
-+extern int ext3_ext_remove_space(struct ext3_extents_tree *, unsigned long, unsigned long);
-+extern struct ext3_ext_path * ext3_ext_find_extent(struct ext3_extents_tree *, int, struct ext3_ext_path *);
-+extern void ext3_init_tree_desc(struct ext3_extents_tree *, struct inode *);
-+extern int ext3_ext_calc_blockmap_metadata(struct inode *, int);
++ ext_debug(tree, "path:");
++ for (k = 0; k <= l; k++, path++) {
++ if (path->p_idx) {
++ ext_debug(tree, " %d->%d", path->p_idx->ei_block,
++ path->p_idx->ei_leaf);
++ } else if (path->p_ext) {
++ ext_debug(tree, " %d:%d:%d",
++ path->p_ext->ee_block,
++ path->p_ext->ee_len,
++ path->p_ext->ee_start);
++ } else
++ ext_debug(tree, " []");
++ }
++ ext_debug(tree, "\n");
++#endif
++}
+
-+static inline void
-+ext3_ext_invalidate_cache(struct ext3_extents_tree *tree)
++static void ext3_ext_show_leaf(struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path)
+{
-+ if (tree->cex)
-+ tree->cex->ee_len = 0;
-+}
++#ifdef EXT_DEBUG
++ int depth = EXT_DEPTH(tree);
++ struct ext3_extent_header *eh;
++ struct ext3_extent *ex;
++ int i;
+
++ if (!path)
++ return;
+
-+#endif /* _LINUX_EXT3_EXTENTS */
++ eh = path[depth].p_hdr;
++ ex = EXT_FIRST_EXTENT(eh);
+
-Index: linux-2.6.10/fs/ext3/inode.c
-===================================================================
---- linux-2.6.10.orig/fs/ext3/inode.c 2005-04-05 12:26:19.367143328 +0800
-+++ linux-2.6.10/fs/ext3/inode.c 2005-04-05 12:26:25.462216736 +0800
-@@ -796,6 +796,17 @@
- goto reread;
- }
-
-+static inline int
-+ext3_get_block_wrap(handle_t *handle, struct inode *inode, long block,
-+ struct buffer_head *bh, int create, int extend_disksize)
++ for (i = 0; i < eh->eh_entries; i++, ex++) {
++ ext_debug(tree, "%d:%d:%d ",
++ ex->ee_block, ex->ee_len, ex->ee_start);
++ }
++ ext_debug(tree, "\n");
++#endif
++}
++
++static void ext3_ext_drop_refs(struct ext3_ext_path *path)
+{
-+ if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL)
-+ return ext3_ext_get_block(handle, inode, block, bh, create,
-+ extend_disksize);
-+ return ext3_get_block_handle(handle, inode, block, bh, create,
-+ extend_disksize);
++ int depth = path->p_depth;
++ int i;
++
++ for (i = 0; i <= depth; i++, path++) {
++ if (path->p_bh) {
++ brelse(path->p_bh);
++ path->p_bh = NULL;
++ }
++ }
+}
+
- static int ext3_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int create)
- {
-@@ -806,8 +817,8 @@
- handle = ext3_journal_current_handle();
- J_ASSERT(handle != 0);
- }
-- ret = ext3_get_block_handle(handle, inode, iblock,
-- bh_result, create, 1);
-+ ret = ext3_get_block_wrap(handle, inode, iblock,
-+ bh_result, create, 1);
- return ret;
- }
-
-@@ -851,8 +862,8 @@
-
- get_block:
- if (ret == 0)
-- ret = ext3_get_block_handle(handle, inode, iblock,
-- bh_result, create, 0);
-+ ret = ext3_get_block_wrap(handle, inode, iblock,
-+ bh_result, create, 0);
- bh_result->b_size = (1 << inode->i_blkbits);
- return ret;
- }
-@@ -871,7 +882,7 @@
- dummy.b_state = 0;
- dummy.b_blocknr = -1000;
- buffer_trace_init(&dummy.b_history);
-- *errp = ext3_get_block_handle(handle, inode, block, &dummy, create, 1);
-+ *errp = ext3_get_block_wrap(handle, inode, block, &dummy, create, 1);
- if (!*errp && buffer_mapped(&dummy)) {
- struct buffer_head *bh;
- bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
-@@ -1591,7 +1602,7 @@
- * This required during truncate. We need to physically zero the tail end
- * of that block so it doesn't yield old data if the file is later grown.
- */
--static int ext3_block_truncate_page(handle_t *handle, struct page *page,
-+int ext3_block_truncate_page(handle_t *handle, struct page *page,
- struct address_space *mapping, loff_t from)
- {
- unsigned long index = from >> PAGE_CACHE_SHIFT;
-@@ -2089,6 +2100,9 @@
- return;
- }
-
-+ if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL)
-+ return ext3_ext_truncate(inode, page);
++/*
++ * binary search for closest index by given block
++ */
++static inline void
++ext3_ext_binsearch_idx(struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path, int block)
++{
++ struct ext3_extent_header *eh = path->p_hdr;
++ struct ext3_extent_idx *ix;
++ int l = 0, k, r;
+
- handle = start_transaction(inode);
- if (IS_ERR(handle)) {
- if (page) {
-@@ -2817,6 +2831,9 @@
- int indirects = (EXT3_NDIR_BLOCKS % bpp) ? 5 : 3;
- int ret;
-
-+ if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL)
-+ return ext3_ext_writepage_trans_blocks(inode, bpp);
-+
- if (ext3_should_journal_data(inode))
- ret = 3 * (bpp + indirects) + 2;
- else
-Index: linux-2.6.10/fs/ext3/ioctl.c
-===================================================================
---- linux-2.6.10.orig/fs/ext3/ioctl.c 2005-04-05 12:25:13.631136720 +0800
-+++ linux-2.6.10/fs/ext3/ioctl.c 2005-04-05 12:26:25.471215368 +0800
-@@ -245,6 +245,10 @@
- return err;
- }
-
-+ case EXT3_IOC_GET_EXTENTS:
-+ case EXT3_IOC_GET_TREE_STATS:
-+ case EXT3_IOC_GET_TREE_DEPTH:
-+ return ext3_ext_ioctl(inode, filp, cmd, arg);
-
- default:
- return -ENOTTY;
-Index: linux-2.6.10/fs/ext3/super.c
-===================================================================
---- linux-2.6.10.orig/fs/ext3/super.c 2005-04-05 12:26:19.438132536 +0800
-+++ linux-2.6.10/fs/ext3/super.c 2005-04-05 12:26:25.471215368 +0800
-@@ -394,6 +394,7 @@
- struct ext3_super_block *es = sbi->s_es;
- int i;
-
-+ ext3_ext_release(sb);
- ext3_xattr_put_super(sb);
- journal_destroy(sbi->s_journal);
- if (!(sb->s_flags & MS_RDONLY)) {
-@@ -463,6 +464,9 @@
- dynlock_init(&ei->i_htree_lock);
- sema_init(&ei->i_rename_sem, 1);
- sema_init(&ei->i_append_sem, 1);
-+ ei->i_cached_extent[0] = 0;
-+ ei->i_cached_extent[1] = 0;
-+ ei->i_cached_extent[2] = 0;
- return &ei->vfs_inode;
- }
-
-@@ -595,6 +599,7 @@
- Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
- Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_pdirops,
- Opt_iopen, Opt_noiopen, Opt_iopen_nopriv,
-+ Opt_extents, Opt_extdebug,
- Opt_ignore, Opt_barrier, Opt_err, Opt_resize,
- };
-
-@@ -647,6 +652,8 @@
- {Opt_iopen, "iopen"},
- {Opt_noiopen, "noiopen"},
- {Opt_iopen_nopriv, "iopen_nopriv"},
-+ {Opt_extents, "extents"},
-+ {Opt_extdebug, "extdebug"},
- {Opt_err, NULL},
- {Opt_resize, "resize"},
- };
-@@ -950,6 +957,12 @@
- match_int(&args[0], &option);
- *n_blocks_count = option;
- break;
-+ case Opt_extents:
-+ set_opt (sbi->s_mount_opt, EXTENTS);
-+ break;
-+ case Opt_extdebug:
-+ set_opt (sbi->s_mount_opt, EXTDEBUG);
-+ break;
- default:
- printk (KERN_ERR
- "EXT3-fs: Unrecognized mount option \"%s\" "
-@@ -1635,6 +1648,8 @@
- percpu_counter_mod(&sbi->s_dirs_counter,
- ext3_count_dirs(sb));
-
-+ ext3_ext_init(sb);
-+
- return 0;
-
- cantfind_ext3:
-Index: linux-2.6.10/fs/ext3/extents.c
-===================================================================
---- linux-2.6.10.orig/fs/ext3/extents.c 2005-04-05 19:01:49.158500672 +0800
-+++ linux-2.6.10/fs/ext3/extents.c 2005-04-05 12:26:25.468215824 +0800
-@@ -0,0 +1,2306 @@
-+/*
-+ * Copyright (c) 2003, Cluster File Systems, Inc, info@clusterfs.com
-+ * Written by Alex Tomas <alex@clusterfs.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public Licens
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-
-+ */
-+
-+/*
-+ * Extents support for EXT3
-+ *
-+ * TODO:
-+ * - ext3_ext_walk_space() sould not use ext3_ext_find_extent()
-+ * - ext3_ext_calc_credits() could take 'mergable' into account
-+ * - ext3*_error() should be used in some situations
-+ * - find_goal() [to be tested and improved]
-+ * - smart tree reduction
-+ * - arch-independence
-+ * common on-disk format for big/little-endian arch
-+ */
++ EXT_ASSERT(eh->eh_magic == EXT3_EXT_MAGIC);
++ EXT_ASSERT(eh->eh_entries <= eh->eh_max);
++ EXT_ASSERT(eh->eh_entries > 0);
+
-+#include <linux/module.h>
-+#include <linux/fs.h>
-+#include <linux/time.h>
-+#include <linux/ext3_jbd.h>
-+#include <linux/jbd.h>
-+#include <linux/smp_lock.h>
-+#include <linux/highuid.h>
-+#include <linux/pagemap.h>
-+#include <linux/quotaops.h>
-+#include <linux/string.h>
-+#include <linux/slab.h>
-+#include <linux/ext3_extents.h>
-+#include <asm/uaccess.h>
++ ext_debug(tree, "binsearch for %d(idx): ", block);
+
-+static handle_t *ext3_ext_journal_restart(handle_t *handle, int needed)
-+{
-+ int err;
++ path->p_idx = ix = EXT_FIRST_INDEX(eh);
+
-+ if (handle->h_buffer_credits > needed)
-+ return handle;
-+ if (!ext3_journal_extend(handle, needed))
-+ return handle;
-+ err = ext3_journal_restart(handle, needed);
-+
-+ return handle;
-+}
++ r = k = eh->eh_entries;
++ while (k > 1) {
++ k = (r - l) / 2;
++ if (block < ix[l + k].ei_block)
++ r -= k;
++ else
++ l += k;
++ ext_debug(tree, "%d:%d:%d ", k, l, r);
++ }
+
-+static int inline
-+ext3_ext_get_access_for_root(handle_t *h, struct ext3_extents_tree *tree)
-+{
-+ if (tree->ops->get_write_access)
-+ return tree->ops->get_write_access(h,tree->buffer);
-+ else
-+ return 0;
-+}
++ ix += l;
++ path->p_idx = ix;
++ ext_debug(tree," -> %d->%d ",path->p_idx->ei_block,path->p_idx->ei_leaf);
+
-+static int inline
-+ext3_ext_mark_root_dirty(handle_t *h, struct ext3_extents_tree *tree)
-+{
-+ if (tree->ops->mark_buffer_dirty)
-+ return tree->ops->mark_buffer_dirty(h,tree->buffer);
-+ else
-+ return 0;
-+}
++ while (l++ < r) {
++ if (block < ix->ei_block)
++ break;
++ path->p_idx = ix++;
++ }
++ ext_debug(tree, " -> %d->%d\n", path->p_idx->ei_block,
++ path->p_idx->ei_leaf);
+
-+/*
-+ * could return:
-+ * - EROFS
-+ * - ENOMEM
-+ */
-+static int ext3_ext_get_access(handle_t *handle,
-+ struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path)
-+{
-+ int err;
++#ifdef CHECK_BINSEARCH
++ {
++ struct ext3_extent_idx *chix;
+
-+ if (path->p_bh) {
-+ /* path points to block */
-+ err = ext3_journal_get_write_access(handle, path->p_bh);
-+ } else {
-+ /* path points to leaf/index in inode body */
-+ err = ext3_ext_get_access_for_root(handle, tree);
++ chix = ix = EXT_FIRST_INDEX(eh);
++ for (k = 0; k < eh->eh_entries; k++, ix++) {
++ if (k != 0 && ix->ei_block <= ix[-1].ei_block) {
++ printk("k=%d, ix=0x%p, first=0x%p\n", k,
++ ix, EXT_FIRST_INDEX(eh));
++ printk("%u <= %u\n",
++ ix->ei_block,ix[-1].ei_block);
++ }
++ EXT_ASSERT(k == 0 || ix->ei_block > ix[-1].ei_block);
++ if (block < ix->ei_block)
++ break;
++ chix = ix;
++ }
++ EXT_ASSERT(chix == path->p_idx);
+ }
-+ return err;
++#endif
+}
+
+/*
-+ * could return:
-+ * - EROFS
-+ * - ENOMEM
-+ * - EIO
++ * binary search for closest extent by given block
+ */
-+static int ext3_ext_dirty(handle_t *handle, struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path)
++static inline void
++ext3_ext_binsearch(struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path, int block)
+{
-+ int err;
-+ if (path->p_bh) {
-+ /* path points to block */
-+ err =ext3_journal_dirty_metadata(handle, path->p_bh);
-+ } else {
-+ /* path points to leaf/index in inode body */
-+ err = ext3_ext_mark_root_dirty(handle, tree);
-+ }
-+ return err;
-+}
++ struct ext3_extent_header *eh = path->p_hdr;
++ struct ext3_extent *ex;
++ int l = 0, k, r;
+
-+static int inline
-+ext3_ext_new_block(handle_t *handle, struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path, struct ext3_extent *ex,
-+ int *err)
-+{
-+ int goal, depth, newblock;
-+ struct inode *inode;
++ EXT_ASSERT(eh->eh_magic == EXT3_EXT_MAGIC);
++ EXT_ASSERT(eh->eh_entries <= eh->eh_max);
+
-+ EXT_ASSERT(tree);
-+ if (tree->ops->new_block)
-+ return tree->ops->new_block(handle, tree, path, ex, err);
++ if (eh->eh_entries == 0) {
++ /*
++ * this leaf is empty yet:
++ * we get such a leaf in split/add case
++ */
++ return;
++ }
++
++ ext_debug(tree, "binsearch for %d: ", block);
+
-+ inode = tree->inode;
-+ depth = EXT_DEPTH(tree);
-+ if (path && depth > 0) {
-+ goal = path[depth-1].p_block;
-+ } else {
-+ struct ext3_inode_info *ei = EXT3_I(inode);
-+ unsigned long bg_start;
-+ unsigned long colour;
++ path->p_ext = ex = EXT_FIRST_EXTENT(eh);
+
-+ bg_start = (ei->i_block_group *
-+ EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
-+ le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
-+ colour = (current->pid % 16) *
-+ (EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
-+ goal = bg_start + colour;
++ r = k = eh->eh_entries;
++ while (k > 1) {
++ k = (r - l) / 2;
++ if (block < ex[l + k].ee_block)
++ r -= k;
++ else
++ l += k;
++ ext_debug(tree, "%d:%d:%d ", k, l, r);
+ }
+
-+ newblock = ext3_new_block(handle, inode, goal, err);
-+ return newblock;
-+}
++ ex += l;
++ path->p_ext = ex;
++ ext_debug(tree, " -> %d:%d:%d ", path->p_ext->ee_block,
++ path->p_ext->ee_start, path->p_ext->ee_len);
+
-+static inline void ext3_ext_tree_changed(struct ext3_extents_tree *tree)
-+{
-+ struct ext3_extent_header *neh;
-+ neh = EXT_ROOT_HDR(tree);
-+ neh->eh_generation++;
-+}
++ while (l++ < r) {
++ if (block < ex->ee_block)
++ break;
++ path->p_ext = ex++;
++ }
++ ext_debug(tree, " -> %d:%d:%d\n", path->p_ext->ee_block,
++ path->p_ext->ee_start, path->p_ext->ee_len);
+
-+static inline int ext3_ext_space_block(struct ext3_extents_tree *tree)
-+{
-+ int size;
++#ifdef CHECK_BINSEARCH
++ {
++ struct ext3_extent *chex;
+
-+ size = (tree->inode->i_sb->s_blocksize -
-+ sizeof(struct ext3_extent_header))
-+ / sizeof(struct ext3_extent);
-+#ifdef AGRESSIVE_TEST
-+ size = 6;
++ chex = ex = EXT_FIRST_EXTENT(eh);
++ for (k = 0; k < eh->eh_entries; k++, ex++) {
++ EXT_ASSERT(k == 0 || ex->ee_block > ex[-1].ee_block);
++ if (block < ex->ee_block)
++ break;
++ chex = ex;
++ }
++ EXT_ASSERT(chex == path->p_ext);
++ }
+#endif
-+ return size;
+}
+
-+static inline int ext3_ext_space_block_idx(struct ext3_extents_tree *tree)
++int ext3_extent_tree_init(handle_t *handle, struct ext3_extents_tree *tree)
+{
-+ int size;
-+
-+ size = (tree->inode->i_sb->s_blocksize -
-+ sizeof(struct ext3_extent_header))
-+ / sizeof(struct ext3_extent_idx);
-+#ifdef AGRESSIVE_TEST
-+ size = 5;
-+#endif
-+ return size;
-+}
-+
-+static inline int ext3_ext_space_root(struct ext3_extents_tree *tree)
-+{
-+ int size;
-+
-+ size = (tree->buffer_len - sizeof(struct ext3_extent_header))
-+ / sizeof(struct ext3_extent);
-+#ifdef AGRESSIVE_TEST
-+ size = 3;
-+#endif
-+ return size;
-+}
-+
-+static inline int ext3_ext_space_root_idx(struct ext3_extents_tree *tree)
-+{
-+ int size;
-+
-+ size = (tree->buffer_len -
-+ sizeof(struct ext3_extent_header))
-+ / sizeof(struct ext3_extent_idx);
-+#ifdef AGRESSIVE_TEST
-+ size = 4;
-+#endif
-+ return size;
-+}
-+
-+static void ext3_ext_show_path(struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path)
-+{
-+#ifdef EXT_DEBUG
-+ int k, l = path->p_depth;
-+
-+ ext_debug(tree, "path:");
-+ for (k = 0; k <= l; k++, path++) {
-+ if (path->p_idx) {
-+ ext_debug(tree, " %d->%d", path->p_idx->ei_block,
-+ path->p_idx->ei_leaf);
-+ } else if (path->p_ext) {
-+ ext_debug(tree, " %d:%d:%d",
-+ path->p_ext->ee_block,
-+ path->p_ext->ee_len,
-+ path->p_ext->ee_start);
-+ } else
-+ ext_debug(tree, " []");
-+ }
-+ ext_debug(tree, "\n");
-+#endif
-+}
-+
-+static void ext3_ext_show_leaf(struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path)
-+{
-+#ifdef EXT_DEBUG
-+ int depth = EXT_DEPTH(tree);
-+ struct ext3_extent_header *eh;
-+ struct ext3_extent *ex;
-+ int i;
-+
-+ if (!path)
-+ return;
-+
-+ eh = path[depth].p_hdr;
-+ ex = EXT_FIRST_EXTENT(eh);
-+
-+ for (i = 0; i < eh->eh_entries; i++, ex++) {
-+ ext_debug(tree, "%d:%d:%d ",
-+ ex->ee_block, ex->ee_len, ex->ee_start);
-+ }
-+ ext_debug(tree, "\n");
-+#endif
-+}
-+
-+static void ext3_ext_drop_refs(struct ext3_ext_path *path)
-+{
-+ int depth = path->p_depth;
-+ int i;
-+
-+ for (i = 0; i <= depth; i++, path++)
-+ if (path->p_bh) {
-+ brelse(path->p_bh);
-+ path->p_bh = NULL;
-+ }
-+}
-+
-+/*
-+ * binary search for closest index by given block
-+ */
-+static inline void
-+ext3_ext_binsearch_idx(struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path, int block)
-+{
-+ struct ext3_extent_header *eh = path->p_hdr;
-+ struct ext3_extent_idx *ix;
-+ int l = 0, k, r;
-+
-+ EXT_ASSERT(eh->eh_magic == EXT3_EXT_MAGIC);
-+ EXT_ASSERT(eh->eh_entries <= eh->eh_max);
-+ EXT_ASSERT(eh->eh_entries > 0);
-+
-+ ext_debug(tree, "binsearch for %d(idx): ", block);
-+
-+ path->p_idx = ix = EXT_FIRST_INDEX(eh);
-+
-+ r = k = eh->eh_entries;
-+ while (k > 1) {
-+ k = (r - l) / 2;
-+ if (block < ix[l + k].ei_block)
-+ r -= k;
-+ else
-+ l += k;
-+ ext_debug(tree, "%d:%d:%d ", k, l, r);
-+ }
-+
-+ ix += l;
-+ path->p_idx = ix;
-+ ext_debug(tree, " -> %d->%d ", path->p_idx->ei_block, path->p_idx->ei_leaf);
-+
-+ while (l++ < r) {
-+ if (block < ix->ei_block)
-+ break;
-+ path->p_idx = ix++;
-+ }
-+ ext_debug(tree, " -> %d->%d\n", path->p_idx->ei_block,
-+ path->p_idx->ei_leaf);
-+
-+#ifdef CHECK_BINSEARCH
-+ {
-+ struct ext3_extent_idx *chix;
-+
-+ chix = ix = EXT_FIRST_INDEX(eh);
-+ for (k = 0; k < eh->eh_entries; k++, ix++) {
-+ if (k != 0 && ix->ei_block <= ix[-1].ei_block) {
-+ printk("k=%d, ix=0x%p, first=0x%p\n", k,
-+ ix, EXT_FIRST_INDEX(eh));
-+ printk("%u <= %u\n",
-+ ix->ei_block,ix[-1].ei_block);
-+ }
-+ EXT_ASSERT(k == 0 || ix->ei_block > ix[-1].ei_block);
-+ if (block < ix->ei_block)
-+ break;
-+ chix = ix;
-+ }
-+ EXT_ASSERT(chix == path->p_idx);
-+ }
-+#endif
-+
-+}
-+
-+/*
-+ * binary search for closest extent by given block
-+ */
-+static inline void
-+ext3_ext_binsearch(struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path, int block)
-+{
-+ struct ext3_extent_header *eh = path->p_hdr;
-+ struct ext3_extent *ex;
-+ int l = 0, k, r;
-+
-+ EXT_ASSERT(eh->eh_magic == EXT3_EXT_MAGIC);
-+ EXT_ASSERT(eh->eh_entries <= eh->eh_max);
-+
-+ if (eh->eh_entries == 0) {
-+ /*
-+ * this leaf is empty yet:
-+ * we get such a leaf in split/add case
-+ */
-+ return;
-+ }
-+
-+ ext_debug(tree, "binsearch for %d: ", block);
-+
-+ path->p_ext = ex = EXT_FIRST_EXTENT(eh);
-+
-+ r = k = eh->eh_entries;
-+ while (k > 1) {
-+ k = (r - l) / 2;
-+ if (block < ex[l + k].ee_block)
-+ r -= k;
-+ else
-+ l += k;
-+ ext_debug(tree, "%d:%d:%d ", k, l, r);
-+ }
-+
-+ ex += l;
-+ path->p_ext = ex;
-+ ext_debug(tree, " -> %d:%d:%d ", path->p_ext->ee_block,
-+ path->p_ext->ee_start, path->p_ext->ee_len);
-+
-+ while (l++ < r) {
-+ if (block < ex->ee_block)
-+ break;
-+ path->p_ext = ex++;
-+ }
-+ ext_debug(tree, " -> %d:%d:%d\n", path->p_ext->ee_block,
-+ path->p_ext->ee_start, path->p_ext->ee_len);
-+
-+#ifdef CHECK_BINSEARCH
-+ {
-+ struct ext3_extent *chex;
-+
-+ chex = ex = EXT_FIRST_EXTENT(eh);
-+ for (k = 0; k < eh->eh_entries; k++, ex++) {
-+ EXT_ASSERT(k == 0 || ex->ee_block > ex[-1].ee_block);
-+ if (block < ex->ee_block)
-+ break;
-+ chex = ex;
-+ }
-+ EXT_ASSERT(chex == path->p_ext);
-+ }
-+#endif
-+
-+}
-+
-+int ext3_extent_tree_init(handle_t *handle, struct ext3_extents_tree *tree)
-+{
-+ struct ext3_extent_header *eh;
++ struct ext3_extent_header *eh;
+
+ BUG_ON(tree->buffer_len == 0);
+ ext3_ext_get_access_for_root(handle, tree);
+
+struct ext3_ext_path *
+ext3_ext_find_extent(struct ext3_extents_tree *tree, int block,
-+ struct ext3_ext_path *path)
++ struct ext3_ext_path *path)
+{
+ struct ext3_extent_header *eh;
+ struct buffer_head *bh;
+
+ eh = EXT_ROOT_HDR(tree);
+ EXT_ASSERT(eh);
++ if (ext3_ext_check_header(eh))
++ goto err;
++
+ i = depth = EXT_DEPTH(tree);
+ EXT_ASSERT(eh->eh_max);
+ EXT_ASSERT(eh->eh_magic == EXT3_EXT_MAGIC);
-+ EXT_ASSERT(i == 0 || eh->eh_entries > 0);
+
+ /* account possible depth increase */
+ if (!path) {
+ path = kmalloc(sizeof(struct ext3_ext_path) * (depth + 2),
-+ GFP_NOFS);
++ GFP_NOFS);
+ if (!path)
+ return ERR_PTR(-ENOMEM);
+ }
+ /* walk through the tree */
+ while (i) {
+ ext_debug(tree, "depth %d: num %d, max %d\n",
-+ ppos, eh->eh_entries, eh->eh_max);
++ ppos, eh->eh_entries, eh->eh_max);
+ ext3_ext_binsearch_idx(tree, path + ppos, block);
+ path[ppos].p_block = path[ppos].p_idx->ei_leaf;
+ path[ppos].p_depth = i;
+ path[ppos].p_ext = NULL;
+
+ bh = sb_bread(tree->inode->i_sb, path[ppos].p_block);
-+ if (!bh) {
-+ ext3_ext_drop_refs(path);
-+ kfree(path);
-+ return ERR_PTR(-EIO);
-+ }
++ if (!bh)
++ goto err;
++
+ eh = EXT_BLOCK_HDR(bh);
+ ppos++;
+ EXT_ASSERT(ppos <= depth);
+ path[ppos].p_bh = bh;
+ path[ppos].p_hdr = eh;
+ i--;
++
++ if (ext3_ext_check_header(eh))
++ goto err;
+ }
+
+ path[ppos].p_depth = i;
+ path[ppos].p_hdr = eh;
+ path[ppos].p_ext = NULL;
++ path[ppos].p_idx = NULL;
++
++ if (ext3_ext_check_header(eh))
++ goto err;
+
+ /* find extent */
+ ext3_ext_binsearch(tree, path + ppos, block);
+ ext3_ext_show_path(tree, path);
+
+ return path;
++
++err:
++ printk(KERN_ERR "EXT3-fs: header is corrupted!\n");
++ ext3_ext_drop_refs(path);
++ kfree(path);
++ return ERR_PTR(-EIO);
+}
+
+/*
+ * it check where to insert: before curp or after curp
+ */
+static int ext3_ext_insert_index(handle_t *handle,
-+ struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *curp,
-+ int logical, int ptr)
++ struct ext3_extents_tree *tree,
++ struct ext3_ext_path *curp,
++ int logical, int ptr)
+{
+ struct ext3_extent_idx *ix;
+ int len, err;
+ len = (len - 1) * sizeof(struct ext3_extent_idx);
+ len = len < 0 ? 0 : len;
+ ext_debug(tree, "insert new index %d after: %d. "
-+ "move %d from 0x%p to 0x%p\n",
-+ logical, ptr, len,
-+ (curp->p_idx + 1), (curp->p_idx + 2));
++ "move %d from 0x%p to 0x%p\n",
++ logical, ptr, len,
++ (curp->p_idx + 1), (curp->p_idx + 2));
+ memmove(curp->p_idx + 2, curp->p_idx + 1, len);
+ }
+ ix = curp->p_idx + 1;
+ len = len * sizeof(struct ext3_extent_idx);
+ len = len < 0 ? 0 : len;
+ ext_debug(tree, "insert new index %d before: %d. "
-+ "move %d from 0x%p to 0x%p\n",
-+ logical, ptr, len,
-+ curp->p_idx, (curp->p_idx + 1));
++ "move %d from 0x%p to 0x%p\n",
++ logical, ptr, len,
++ curp->p_idx, (curp->p_idx + 1));
+ memmove(curp->p_idx + 1, curp->p_idx, len);
+ ix = curp->p_idx;
+ }
+ * - initialize subtree
+ */
+static int ext3_ext_split(handle_t *handle, struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path,
-+ struct ext3_extent *newext, int at)
++ struct ext3_ext_path *path,
++ struct ext3_extent *newext, int at)
+{
+ struct buffer_head *bh = NULL;
+ int depth = EXT_DEPTH(tree);
+ if (path[depth].p_ext != EXT_MAX_EXTENT(path[depth].p_hdr)) {
+ border = path[depth].p_ext[1].ee_block;
+ ext_debug(tree, "leaf will be splitted."
-+ " next leaf starts at %d\n",
-+ (int)border);
++ " next leaf starts at %d\n",
++ (int)border);
+ } else {
+ border = newext->ee_block;
+ ext_debug(tree, "leaf will be added."
-+ " next leaf starts at %d\n",
-+ (int)border);
++ " next leaf starts at %d\n",
++ (int)border);
+ }
+
+ /*
+ while (path[depth].p_ext <=
+ EXT_MAX_EXTENT(path[depth].p_hdr)) {
+ ext_debug(tree, "move %d:%d:%d in new leaf %lu\n",
-+ path[depth].p_ext->ee_block,
-+ path[depth].p_ext->ee_start,
-+ path[depth].p_ext->ee_len,
-+ newblock);
-+ memmove(ex++, path[depth].p_ext++,
-+ sizeof(struct ext3_extent));
++ path[depth].p_ext->ee_block,
++ path[depth].p_ext->ee_start,
++ path[depth].p_ext->ee_len,
++ newblock);
++ memmove(ex++, path[depth].p_ext++, sizeof(struct ext3_extent));
+ neh->eh_entries++;
+ m++;
+ }
+ fidx->ei_leaf = oldblock;
+
+ ext_debug(tree, "int.index at %d (block %lu): %lu -> %lu\n",
-+ i, newblock, border, oldblock);
++ i, newblock, border, oldblock);
+ /* copy indexes */
+ m = 0;
+ path[i].p_idx++;
+
+ ext_debug(tree, "cur 0x%p, last 0x%p\n", path[i].p_idx,
-+ EXT_MAX_INDEX(path[i].p_hdr));
++ EXT_MAX_INDEX(path[i].p_hdr));
+ EXT_ASSERT(EXT_MAX_INDEX(path[i].p_hdr) ==
-+ EXT_LAST_INDEX(path[i].p_hdr));
++ EXT_LAST_INDEX(path[i].p_hdr));
+ while (path[i].p_idx <= EXT_MAX_INDEX(path[i].p_hdr)) {
+ ext_debug(tree, "%d: move %d:%d in new index %lu\n",
-+ i, path[i].p_idx->ei_block,
-+ path[i].p_idx->ei_leaf, newblock);
++ i, path[i].p_idx->ei_block,
++ path[i].p_idx->ei_leaf, newblock);
+ memmove(++fidx, path[i].p_idx++,
-+ sizeof(struct ext3_extent_idx));
++ sizeof(struct ext3_extent_idx));
+ neh->eh_entries++;
+ EXT_ASSERT(neh->eh_entries <= neh->eh_max);
+ m++;
+ /* insert new index */
+ if (!err)
+ err = ext3_ext_insert_index(handle, tree, path + at,
-+ border, newblock);
++ border, newblock);
+
+cleanup:
+ if (bh) {
+ * just created block
+ */
+static int ext3_ext_grow_indepth(handle_t *handle,
-+ struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path,
-+ struct ext3_extent *newext)
++ struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path,
++ struct ext3_extent *newext)
+{
+ struct ext3_ext_path *curp = path;
+ struct ext3_extent_header *neh;
+ /* set size of new block */
+ neh = EXT_BLOCK_HDR(bh);
+ /* old root could have indexes or leaves
-+ * so calculate e_max right way */
++ * so calculate eh_max right way */
+ if (EXT_DEPTH(tree))
+ neh->eh_max = ext3_ext_space_block_idx(tree);
+ else
+ neh = EXT_ROOT_HDR(tree);
+ fidx = EXT_FIRST_INDEX(neh);
+ ext_debug(tree, "new root: num %d(%d), lblock %d, ptr %d\n",
-+ neh->eh_entries, neh->eh_max, fidx->ei_block, fidx->ei_leaf);
++ neh->eh_entries, neh->eh_max, fidx->ei_block, fidx->ei_leaf);
+
+ neh->eh_depth = path->p_depth + 1;
+ err = ext3_ext_dirty(handle, tree, curp);
+ * then it requests in-depth growing
+ */
+static int ext3_ext_create_new_leaf(handle_t *handle,
-+ struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path,
-+ struct ext3_extent *newext)
++ struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path,
++ struct ext3_extent *newext)
+{
+ struct ext3_ext_path *curp;
+ int depth, i, err = 0;
+ if (depth == path->p_depth) {
+ /* leaf */
+ if (path[depth].p_ext !=
-+ EXT_LAST_EXTENT(path[depth].p_hdr))
++ EXT_LAST_EXTENT(path[depth].p_hdr))
+ return path[depth].p_ext[1].ee_block;
+ } else {
+ /* index */
+ if (path[depth].p_idx !=
-+ EXT_LAST_INDEX(path[depth].p_hdr))
++ EXT_LAST_INDEX(path[depth].p_hdr))
+ return path[depth].p_idx[1].ei_block;
+ }
+ depth--;
+ * returns first allocated block from next leaf or EXT_MAX_BLOCK
+ */
+static unsigned ext3_ext_next_leaf_block(struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path)
++ struct ext3_ext_path *path)
+{
+ int depth;
+
+
+ while (depth >= 0) {
+ if (path[depth].p_idx !=
-+ EXT_LAST_INDEX(path[depth].p_hdr))
++ EXT_LAST_INDEX(path[depth].p_hdr))
+ return path[depth].p_idx[1].ei_block;
+ depth--;
+ }
+ * TODO: do we need to correct tree in all cases?
+ */
+int ext3_ext_correct_indexes(handle_t *handle, struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path)
++ struct ext3_ext_path *path)
+{
+ struct ext3_extent_header *eh;
+ int depth = EXT_DEPTH(tree);
+
+static int inline
+ext3_can_extents_be_merged(struct ext3_extents_tree *tree,
-+ struct ext3_extent *ex1,
-+ struct ext3_extent *ex2)
++ struct ext3_extent *ex1,
++ struct ext3_extent *ex2)
+{
+ if (ex1->ee_block + ex1->ee_len != ex2->ee_block)
+ return 0;
+ * creating new leaf in no-space case
+ */
+int ext3_ext_insert_extent(handle_t *handle, struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path,
-+ struct ext3_extent *newext)
++ struct ext3_ext_path *path,
++ struct ext3_extent *newext)
+{
+ struct ext3_extent_header * eh;
+ struct ext3_extent *ex, *fex;
+ int depth, len, err, next;
+
+ EXT_ASSERT(newext->ee_len > 0);
-+ EXT_ASSERT(newext->ee_len < EXT_CACHE_MARK);
+ depth = EXT_DEPTH(tree);
+ ex = path[depth].p_ext;
+ EXT_ASSERT(path[depth].p_hdr);
+ /* try to insert block into found extent and return */
+ if (ex && ext3_can_extents_be_merged(tree, ex, newext)) {
+ ext_debug(tree, "append %d block to %d:%d (from %d)\n",
-+ newext->ee_len, ex->ee_block, ex->ee_len,
-+ ex->ee_start);
++ newext->ee_len, ex->ee_block, ex->ee_len,
++ ex->ee_start);
+ if ((err = ext3_ext_get_access(handle, tree, path + depth)))
+ return err;
+ ex->ee_len += newext->ee_len;
+ eh = npath[depth].p_hdr;
+ if (eh->eh_entries < eh->eh_max) {
+ ext_debug(tree, "next leaf isnt full(%d)\n",
-+ eh->eh_entries);
++ eh->eh_entries);
+ path = npath;
+ goto repeat;
+ }
+ ext_debug(tree, "next leaf hasno free space(%d,%d)\n",
-+ eh->eh_entries, eh->eh_max);
++ eh->eh_entries, eh->eh_max);
+ }
+
+ /*
+ if (!nearex) {
+ /* there is no extent in this leaf, create first one */
+ ext_debug(tree, "first extent in the leaf: %d:%d:%d\n",
-+ newext->ee_block, newext->ee_start,
-+ newext->ee_len);
++ newext->ee_block, newext->ee_start,
++ newext->ee_len);
+ path[depth].p_ext = EXT_FIRST_EXTENT(eh);
+ } else if (newext->ee_block > nearex->ee_block) {
+ EXT_ASSERT(newext->ee_block != nearex->ee_block);
+ len = (len - 1) * sizeof(struct ext3_extent);
+ len = len < 0 ? 0 : len;
+ ext_debug(tree, "insert %d:%d:%d after: nearest 0x%p, "
-+ "move %d from 0x%p to 0x%p\n",
-+ newext->ee_block, newext->ee_start,
-+ newext->ee_len,
-+ nearex, len, nearex + 1, nearex + 2);
++ "move %d from 0x%p to 0x%p\n",
++ newext->ee_block, newext->ee_start,
++ newext->ee_len,
++ nearex, len, nearex + 1, nearex + 2);
+ memmove(nearex + 2, nearex + 1, len);
+ }
+ path[depth].p_ext = nearex + 1;
+ len = (EXT_MAX_EXTENT(eh) - nearex) * sizeof(struct ext3_extent);
+ len = len < 0 ? 0 : len;
+ ext_debug(tree, "insert %d:%d:%d before: nearest 0x%p, "
-+ "move %d from 0x%p to 0x%p\n",
-+ newext->ee_block, newext->ee_start, newext->ee_len,
-+ nearex, len, nearex + 1, nearex + 2);
++ "move %d from 0x%p to 0x%p\n",
++ newext->ee_block, newext->ee_start, newext->ee_len,
++ nearex, len, nearex + 1, nearex + 2);
+ memmove(nearex + 1, nearex, len);
+ path[depth].p_ext = nearex;
+ }
+ /* merge with next extent! */
+ nearex->ee_len += nearex[1].ee_len;
+ if (nearex + 1 < EXT_LAST_EXTENT(eh)) {
-+ len = (EXT_LAST_EXTENT(eh) - nearex - 1)
-+ * sizeof(struct ext3_extent);
++ len = (EXT_LAST_EXTENT(eh) - nearex - 1) *
++ sizeof(struct ext3_extent);
+ memmove(nearex + 1, nearex + 2, len);
+ }
+ eh->eh_entries--;
+ unsigned long num, ext_prepare_callback func)
+{
+ struct ext3_ext_path *path = NULL;
-+ struct ext3_extent *ex, cbex;
++ struct ext3_ext_cache cbex;
++ struct ext3_extent *ex;
+ unsigned long next, start = 0, end = 0;
+ unsigned long last = block + num;
+ int depth, exists, err = 0;
+ EXT_ASSERT(end > start);
+
+ if (!exists) {
-+ cbex.ee_block = start;
-+ cbex.ee_len = end - start;
-+ cbex.ee_start = 0;
-+ } else
-+ cbex = *ex;
++ cbex.ec_block = start;
++ cbex.ec_len = end - start;
++ cbex.ec_start = 0;
++ cbex.ec_type = EXT3_EXT_CACHE_GAP;
++ } else {
++ cbex.ec_block = ex->ee_block;
++ cbex.ec_len = ex->ee_len;
++ cbex.ec_start = ex->ee_start;
++ cbex.ec_type = EXT3_EXT_CACHE_EXTENT;
++ }
+
++ EXT_ASSERT(cbex.ec_len > 0);
+ EXT_ASSERT(path[depth].p_hdr);
-+ err = func(tree, path, &cbex, exists);
++ err = func(tree, path, &cbex);
+ ext3_ext_drop_refs(path);
+
+ if (err < 0)
+ path = NULL;
+ }
+
-+ block = cbex.ee_block + cbex.ee_len;
++ block = cbex.ec_block + cbex.ec_len;
+ }
+
+ if (path) {
+}
+
+static inline void
-+ext3_ext_put_in_cache(struct ext3_extents_tree *tree, struct ext3_extent *ex)
++ext3_ext_put_in_cache(struct ext3_extents_tree *tree, __u32 block,
++ __u32 len, __u32 start, int type)
+{
++ EXT_ASSERT(len > 0);
+ if (tree->cex) {
-+ EXT_ASSERT(ex);
-+ EXT_ASSERT(ex->ee_len);
-+ tree->cex->ee_block = ex->ee_block;
-+ tree->cex->ee_start = ex->ee_start;
-+ tree->cex->ee_len = ex->ee_len;
++ tree->cex->ec_type = type;
++ tree->cex->ec_block = block;
++ tree->cex->ec_len = len;
++ tree->cex->ec_start = start;
+ }
+}
+
+ */
+static inline void
+ext3_ext_put_gap_in_cache(struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path,
-+ unsigned long block)
++ struct ext3_ext_path *path,
++ unsigned long block)
+{
+ int depth = EXT_DEPTH(tree);
-+ struct ext3_extent *ex, gex;
++ unsigned long lblock, len;
++ struct ext3_extent *ex;
+
+ if (!tree->cex)
+ return;
+ ex = path[depth].p_ext;
+ if (ex == NULL) {
+ /* there is no extent yet, so gap is [0;-] */
-+ gex.ee_block = 0;
-+ gex.ee_len = EXT_CACHE_MARK;
++ lblock = 0;
++ len = EXT_MAX_BLOCK;
+ ext_debug(tree, "cache gap(whole file):");
+ } else if (block < ex->ee_block) {
-+ gex.ee_block = block;
-+ gex.ee_len = ex->ee_block - block;
++ lblock = block;
++ len = ex->ee_block - block;
+ ext_debug(tree, "cache gap(before): %lu [%lu:%lu]",
-+ (unsigned long) block,
-+ (unsigned long) ex->ee_block,
-+ (unsigned long) ex->ee_len);
++ (unsigned long) block,
++ (unsigned long) ex->ee_block,
++ (unsigned long) ex->ee_len);
+ } else if (block >= ex->ee_block + ex->ee_len) {
-+ gex.ee_block = ex->ee_block + ex->ee_len;
-+ gex.ee_len = ext3_ext_next_allocated_block(path);
++ lblock = ex->ee_block + ex->ee_len;
++ len = ext3_ext_next_allocated_block(path);
+ ext_debug(tree, "cache gap(after): [%lu:%lu] %lu",
-+ (unsigned long) ex->ee_block,
-+ (unsigned long) ex->ee_len,
-+ (unsigned long) block);
-+ EXT_ASSERT(gex.ee_len > gex.ee_block);
-+ gex.ee_len = gex.ee_len - gex.ee_block;
++ (unsigned long) ex->ee_block,
++ (unsigned long) ex->ee_len,
++ (unsigned long) block);
++ EXT_ASSERT(len > lblock);
++ len = len - lblock;
+ } else {
++ lblock = len = 0;
+ BUG();
+ }
+
-+ ext_debug(tree, " -> %lu:%lu\n", (unsigned long) gex.ee_block,
-+ (unsigned long) gex.ee_len);
-+ gex.ee_start = EXT_CACHE_MARK;
-+ ext3_ext_put_in_cache(tree, &gex);
++ ext_debug(tree, " -> %lu:%lu\n", (unsigned long) lblock, len);
++ ext3_ext_put_in_cache(tree, lblock, len, 0, EXT3_EXT_CACHE_GAP);
+}
+
+static inline int
+ext3_ext_in_cache(struct ext3_extents_tree *tree, unsigned long block,
-+ struct ext3_extent *ex)
++ struct ext3_extent *ex)
+{
-+ struct ext3_extent *cex = tree->cex;
++ struct ext3_ext_cache *cex = tree->cex;
+
+ /* is there cache storage at all? */
+ if (!cex)
-+ return 0;
++ return EXT3_EXT_CACHE_NO;
+
+ /* has cache valid data? */
-+ if (cex->ee_len == 0)
-+ return 0;
-+
-+ if (block >= cex->ee_block && block < cex->ee_block + cex->ee_len) {
-+ ex->ee_block = cex->ee_block;
-+ ex->ee_start = cex->ee_start;
-+ ex->ee_len = cex->ee_len;
++ if (cex->ec_type == EXT3_EXT_CACHE_NO)
++ return EXT3_EXT_CACHE_NO;
++
++ EXT_ASSERT(cex->ec_type == EXT3_EXT_CACHE_GAP ||
++ cex->ec_type == EXT3_EXT_CACHE_EXTENT);
++ if (block >= cex->ec_block && block < cex->ec_block + cex->ec_len) {
++ ex->ee_block = cex->ec_block;
++ ex->ee_start = cex->ec_start;
++ ex->ee_len = cex->ec_len;
+ ext_debug(tree, "%lu cached by %lu:%lu:%lu\n",
-+ (unsigned long) block,
-+ (unsigned long) ex->ee_block,
-+ (unsigned long) ex->ee_len,
-+ (unsigned long) ex->ee_start);
-+ return 1;
++ (unsigned long) block,
++ (unsigned long) ex->ee_block,
++ (unsigned long) ex->ee_len,
++ (unsigned long) ex->ee_start);
++ return cex->ec_type;
+ }
+
+ /* not in cache */
-+ return 0;
++ return EXT3_EXT_CACHE_NO;
+}
+
+/*
+ * last index in the block only
+ */
+int ext3_ext_rm_idx(handle_t *handle, struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path)
++ struct ext3_ext_path *path)
+{
+ struct buffer_head *bh;
+ int err;
+ if ((err = ext3_ext_dirty(handle, tree, path)))
+ return err;
+ ext_debug(tree, "index is empty, remove it, free block %d\n",
-+ path->p_idx->ei_leaf);
++ path->p_idx->ei_leaf);
+ bh = sb_find_get_block(tree->inode->i_sb, path->p_idx->ei_leaf);
+ ext3_forget(handle, 1, tree->inode, bh, path->p_idx->ei_leaf);
+ ext3_free_blocks(handle, tree->inode, path->p_idx->ei_leaf, 1);
+}
+
+int ext3_ext_calc_credits_for_insert(struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path)
++ struct ext3_ext_path *path)
+{
+ int depth = EXT_DEPTH(tree);
+ int needed;
+
+static int
+ext3_ext_split_for_rm(handle_t *handle, struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path, unsigned long start,
-+ unsigned long end)
++ struct ext3_ext_path *path, unsigned long start,
++ unsigned long end)
+{
+ struct ext3_extent *ex, tex;
+ struct ext3_ext_path *npath;
+ /* FIXME: some callback to free underlying resource
+ * and correct ee_start? */
+ ext_debug(tree, "split extent: head %u:%u, tail %u:%u\n",
-+ ex->ee_block, ex->ee_len, tex.ee_block, tex.ee_len);
++ ex->ee_block, ex->ee_len, tex.ee_block, tex.ee_len);
+
+ npath = ext3_ext_find_extent(tree, ex->ee_block, NULL);
+ if (IS_ERR(npath))
+ kfree(npath);
+
+ return err;
-+
+}
+
+static int
+ext3_ext_rm_leaf(handle_t *handle, struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path, unsigned long start,
-+ unsigned long end)
++ struct ext3_ext_path *path, unsigned long start,
++ unsigned long end)
+{
+ struct ext3_extent *ex, *fu = NULL, *lu, *le;
+ int err = 0, correct_index = 0;
+ }
+
+ lu = ex;
-+ while (ex >= EXT_FIRST_EXTENT(eh) &&
-+ ex->ee_block + ex->ee_len > start) {
++ while (ex >= EXT_FIRST_EXTENT(eh) && ex->ee_block + ex->ee_len > start) {
+ ext_debug(tree, "remove ext %u:%u\n", ex->ee_block, ex->ee_len);
+ path[depth].p_ext = ex;
+
+ block = ex->ee_block;
+ num = 0;
+ EXT_ASSERT(a == ex->ee_block &&
-+ b == ex->ee_block + ex->ee_len - 1);
++ b == ex->ee_block + ex->ee_len - 1);
+ }
+
+ if (ex == EXT_FIRST_EXTENT(eh))
+ goto out;
+
+ ext_debug(tree, "new extent: %u:%u:%u\n",
-+ ex->ee_block, ex->ee_len, ex->ee_start);
++ ex->ee_block, ex->ee_len, ex->ee_start);
+ ex--;
+ }
+
+}
+
+int ext3_ext_remove_space(struct ext3_extents_tree *tree,
-+ unsigned long start, unsigned long end)
++ unsigned long start, unsigned long end)
+{
+ struct inode *inode = tree->inode;
+ struct super_block *sb = inode->i_sb;
+ */
+ path = kmalloc(sizeof(struct ext3_ext_path) * (depth + 1), GFP_KERNEL);
+ if (IS_ERR(path)) {
-+ ext3_error(sb, "ext3_ext_remove_space",
-+ "Can't allocate path array");
++ ext3_error(sb, __FUNCTION__, "Can't allocate path array");
+ ext3_journal_stop(handle);
+ return -ENOMEM;
+ }
+ ext3_ext_last_covered(path[i].p_hdr, end);
+ path[i].p_block = path[i].p_hdr->eh_entries + 1;
+ ext_debug(tree, "init index ptr: hdr 0x%p, num %d\n",
-+ path[i].p_hdr, path[i].p_hdr->eh_entries);
++ path[i].p_hdr, path[i].p_hdr->eh_entries);
+ } else {
+ /* we've already was here, see at next index */
+ path[i].p_idx--;
+ }
+
+ ext_debug(tree, "level %d - index, first 0x%p, cur 0x%p\n",
-+ i, EXT_FIRST_INDEX(path[i].p_hdr),
-+ path[i].p_idx);
++ i, EXT_FIRST_INDEX(path[i].p_hdr),
++ path[i].p_idx);
+ if (ext3_ext_more_to_rm(path + i)) {
+ /* go to the next level */
+ ext_debug(tree, "move to level %d (block %d)\n",
-+ i + 1, path[i].p_idx->ei_leaf);
++ i + 1, path[i].p_idx->ei_leaf);
+ memset(path + i + 1, 0, sizeof(*path));
+ path[i+1].p_bh = sb_bread(sb, path[i].p_idx->ei_leaf);
+ if (!path[i+1].p_bh) {
+}
+
+static int ext3_ext_mergable(struct ext3_extent *ex1,
-+ struct ext3_extent *ex2)
++ struct ext3_extent *ex2)
+{
+ /* FIXME: support for large fs */
+ if (ex1->ee_start + ex1->ee_len == ex2->ee_start)
+
+static int
+ext3_remove_blocks_credits(struct ext3_extents_tree *tree,
-+ struct ext3_extent *ex,
-+ unsigned long from, unsigned long to)
++ struct ext3_extent *ex,
++ unsigned long from, unsigned long to)
+{
+ int needed;
+
+
+static int
+ext3_remove_blocks(struct ext3_extents_tree *tree,
-+ struct ext3_extent *ex,
-+ unsigned long from, unsigned long to)
++ struct ext3_extent *ex,
++ unsigned long from, unsigned long to)
+{
+ int needed = ext3_remove_blocks_credits(tree, ex, from, to);
+ handle_t *handle = ext3_journal_start(tree->inode, needed);
+ num = ex->ee_block + ex->ee_len - from;
+ start = ex->ee_start + ex->ee_len - num;
+ ext_debug(tree, "free last %lu blocks starting %lu\n",
-+ num, start);
++ num, start);
+ for (i = 0; i < num; i++) {
+ bh = sb_find_get_block(tree->inode->i_sb, start + i);
+ ext3_forget(handle, 0, tree->inode, bh, start + i);
+ ext3_free_blocks(handle, tree->inode, start, num);
+ } else if (from == ex->ee_block && to <= ex->ee_block + ex->ee_len - 1) {
+ printk("strange request: removal %lu-%lu from %u:%u\n",
-+ from, to, ex->ee_block, ex->ee_len);
++ from, to, ex->ee_block, ex->ee_len);
+ } else {
+ printk("strange request: removal(2) %lu-%lu from %u:%u\n",
-+ from, to, ex->ee_block, ex->ee_len);
++ from, to, ex->ee_block, ex->ee_len);
+ }
+ ext3_journal_stop(handle);
+ return 0;
+}
+
+static int ext3_ext_find_goal(struct inode *inode,
-+ struct ext3_ext_path *path, unsigned long block)
++ struct ext3_ext_path *path, unsigned long block)
+{
+ struct ext3_inode_info *ei = EXT3_I(inode);
+ unsigned long bg_start;
+}
+
+static int ext3_new_block_cb(handle_t *handle, struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path,
-+ struct ext3_extent *ex, int *err)
++ struct ext3_ext_path *path,
++ struct ext3_extent *ex, int *err)
+{
+ struct inode *inode = tree->inode;
+ int newblock, goal;
+};
+
+void ext3_init_tree_desc(struct ext3_extents_tree *tree,
-+ struct inode *inode)
++ struct inode *inode)
+{
+ tree->inode = inode;
+ tree->root = (void *) EXT3_I(inode)->i_data;
+ tree->buffer = (void *) inode;
+ tree->buffer_len = sizeof(EXT3_I(inode)->i_data);
-+ tree->cex = (struct ext3_extent *) &EXT3_I(inode)->i_cached_extent;
++ tree->cex = &EXT3_I(inode)->i_cached_extent;
+ tree->ops = &ext3_blockmap_helpers;
+}
+
+int ext3_ext_get_block(handle_t *handle, struct inode *inode,
-+ long iblock, struct buffer_head *bh_result,
-+ int create, int extend_disksize)
++ long iblock, struct buffer_head *bh_result,
++ int create, int extend_disksize)
+{
+ struct ext3_ext_path *path = NULL;
+ struct ext3_extent newex;
+ int goal, newblock, err = 0, depth;
+ struct ext3_extents_tree tree;
+
-+ clear_buffer_new(bh_result);
++ __clear_bit(BH_New, &bh_result->b_state);
+ ext3_init_tree_desc(&tree, inode);
+ ext_debug(&tree, "block %d requested for inode %u\n",
-+ (int) iblock, (unsigned) inode->i_ino);
++ (int) iblock, (unsigned) inode->i_ino);
+ down(&EXT3_I(inode)->truncate_sem);
+
+ /* check in cache */
-+ if (ext3_ext_in_cache(&tree, iblock, &newex)) {
-+ if (newex.ee_start == EXT_CACHE_MARK) {
-+ /* this is cached gap */
++ if ((goal = ext3_ext_in_cache(&tree, iblock, &newex))) {
++ if (goal == EXT3_EXT_CACHE_GAP) {
+ if (!create) {
+ /* block isn't allocated yet and
+ * user don't want to allocate it */
+ goto out2;
+ }
+ /* we should allocate requested block */
-+ } else if (newex.ee_start) {
++ } else if (goal == EXT3_EXT_CACHE_EXTENT) {
+ /* block is already allocated */
+ newblock = iblock - newex.ee_block + newex.ee_start;
+ goto out;
++ } else {
++ EXT_ASSERT(0);
+ }
+ }
+
+ if (iblock >= ex->ee_block && iblock < ex->ee_block + ex->ee_len) {
+ newblock = iblock - ex->ee_block + ex->ee_start;
+ ext_debug(&tree, "%d fit into %d:%d -> %d\n",
-+ (int) iblock, ex->ee_block, ex->ee_len,
-+ newblock);
-+ ext3_ext_put_in_cache(&tree, ex);
++ (int) iblock, ex->ee_block, ex->ee_len,
++ newblock);
++ ext3_ext_put_in_cache(&tree, ex->ee_block,
++ ex->ee_len, ex->ee_start,
++ EXT3_EXT_CACHE_EXTENT);
+ goto out;
+ }
+ }
+ if (!newblock)
+ goto out2;
+ ext_debug(&tree, "allocate new block: goal %d, found %d\n",
-+ goal, newblock);
++ goal, newblock);
+
+ /* try to insert new extent into found leaf and return */
+ newex.ee_block = iblock;
+
+ /* previous routine could use block we allocated */
+ newblock = newex.ee_start;
-+ set_buffer_new(bh_result);
++ __set_bit(BH_New, &bh_result->b_state);
+
-+ ext3_ext_put_in_cache(&tree, &newex);
++ ext3_ext_put_in_cache(&tree, newex.ee_block, newex.ee_len,
++ newex.ee_start, EXT3_EXT_CACHE_EXTENT);
+out:
+ ext3_ext_show_leaf(&tree, path);
-+ map_bh(bh_result, inode->i_sb, newblock);
++ __set_bit(BH_Mapped, &bh_result->b_state);
++ bh_result->b_bdev = inode->i_sb->s_bdev;
++ bh_result->b_blocknr = newblock;
+out2:
+ if (path) {
+ ext3_ext_drop_refs(path);
+ EXT3_I(inode)->i_disksize = inode->i_size;
+ ext3_mark_inode_dirty(handle, inode);
+
-+ last_block = (inode->i_size + sb->s_blocksize - 1)
-+ >> EXT3_BLOCK_SIZE_BITS(sb);
-+ err = ext3_ext_remove_space(&tree, last_block, EXT_MAX_BLOCK);
-+
-+ /* In a multi-transaction truncate, we only make the final
-+ * transaction synchronous */
-+ if (IS_SYNC(inode))
-+ handle->h_sync = 1;
++ last_block = (inode->i_size + sb->s_blocksize - 1) >>
++ EXT3_BLOCK_SIZE_BITS(sb);
++ err = ext3_ext_remove_space(&tree, last_block, EXT_MAX_BLOCK);
++
++ /* In a multi-transaction truncate, we only make the final
++ * transaction synchronous */
++ if (IS_SYNC(inode))
++ handle->h_sync = 1;
++
++out_stop:
++ /*
++ * If this was a simple ftruncate(), and the file will remain alive
++ * then we need to clear up the orphan record which we created above.
++ * However, if this was a real unlink then we were called by
++ * ext3_delete_inode(), and we allow that function to clean up the
++ * orphan info for us.
++ */
++ if (inode->i_nlink)
++ ext3_orphan_del(handle, inode);
++
++ up(&EXT3_I(inode)->truncate_sem);
++ ext3_journal_stop(handle);
++}
++
++/*
++ * this routine calculate max number of blocks we could modify
++ * in order to allocate new block for an inode
++ */
++int ext3_ext_writepage_trans_blocks(struct inode *inode, int num)
++{
++ struct ext3_extents_tree tree;
++ int needed;
++
++ ext3_init_tree_desc(&tree, inode);
++
++ needed = ext3_ext_calc_credits_for_insert(&tree, NULL);
++
++ /* caller want to allocate num blocks */
++ needed *= num;
++
++#ifdef CONFIG_QUOTA
++ /*
++ * FIXME: real calculation should be here
++ * it depends on blockmap format of qouta file
++ */
++ needed += 2 * EXT3_SINGLEDATA_TRANS_BLOCKS;
++#endif
++
++ return needed;
++}
++
++void ext3_extents_initialize_blockmap(handle_t *handle, struct inode *inode)
++{
++ struct ext3_extents_tree tree;
++
++ ext3_init_tree_desc(&tree, inode);
++ ext3_extent_tree_init(handle, &tree);
++}
++
++int ext3_ext_calc_blockmap_metadata(struct inode *inode, int blocks)
++{
++ struct ext3_extents_tree tree;
++
++ ext3_init_tree_desc(&tree, inode);
++ return ext3_ext_calc_metadata_amount(&tree, blocks);
++}
++
++static int
++ext3_ext_store_extent_cb(struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path,
++ struct ext3_ext_cache *newex)
++{
++ struct ext3_extent_buf *buf = (struct ext3_extent_buf *) tree->private;
++
++ if (newex->ec_type != EXT3_EXT_CACHE_EXTENT)
++ return EXT_CONTINUE;
++
++ if (buf->err < 0)
++ return EXT_BREAK;
++ if (buf->cur - buf->buffer + sizeof(*newex) > buf->buflen)
++ return EXT_BREAK;
++
++ if (!copy_to_user(buf->cur, newex, sizeof(*newex))) {
++ buf->err++;
++ buf->cur += sizeof(*newex);
++ } else {
++ buf->err = -EFAULT;
++ return EXT_BREAK;
++ }
++ return EXT_CONTINUE;
++}
++
++static int
++ext3_ext_collect_stats_cb(struct ext3_extents_tree *tree,
++ struct ext3_ext_path *path,
++ struct ext3_ext_cache *ex)
++{
++ struct ext3_extent_tree_stats *buf =
++ (struct ext3_extent_tree_stats *) tree->private;
++ int depth;
++
++ if (ex->ec_type != EXT3_EXT_CACHE_EXTENT)
++ return EXT_CONTINUE;
++
++ depth = EXT_DEPTH(tree);
++ buf->extents_num++;
++ if (path[depth].p_ext == EXT_FIRST_EXTENT(path[depth].p_hdr))
++ buf->leaf_num++;
++ return EXT_CONTINUE;
++}
++
++int ext3_ext_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
++ unsigned long arg)
++{
++ int err = 0;
++
++ if (!(EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL))
++ return -EINVAL;
++
++ if (cmd == EXT3_IOC_GET_EXTENTS) {
++ struct ext3_extent_buf buf;
++ struct ext3_extents_tree tree;
++
++ if (copy_from_user(&buf, (void *) arg, sizeof(buf)))
++ return -EFAULT;
++
++ ext3_init_tree_desc(&tree, inode);
++ buf.cur = buf.buffer;
++ buf.err = 0;
++ tree.private = &buf;
++ down(&EXT3_I(inode)->truncate_sem);
++ err = ext3_ext_walk_space(&tree, buf.start, EXT_MAX_BLOCK,
++ ext3_ext_store_extent_cb);
++ up(&EXT3_I(inode)->truncate_sem);
++ if (err == 0)
++ err = buf.err;
++ } else if (cmd == EXT3_IOC_GET_TREE_STATS) {
++ struct ext3_extent_tree_stats buf;
++ struct ext3_extents_tree tree;
++
++ ext3_init_tree_desc(&tree, inode);
++ down(&EXT3_I(inode)->truncate_sem);
++ buf.depth = EXT_DEPTH(&tree);
++ buf.extents_num = 0;
++ buf.leaf_num = 0;
++ tree.private = &buf;
++ err = ext3_ext_walk_space(&tree, 0, EXT_MAX_BLOCK,
++ ext3_ext_collect_stats_cb);
++ up(&EXT3_I(inode)->truncate_sem);
++ if (!err)
++ err = copy_to_user((void *) arg, &buf, sizeof(buf));
++ } else if (cmd == EXT3_IOC_GET_TREE_DEPTH) {
++ struct ext3_extents_tree tree;
++ ext3_init_tree_desc(&tree, inode);
++ down(&EXT3_I(inode)->truncate_sem);
++ err = EXT_DEPTH(&tree);
++ up(&EXT3_I(inode)->truncate_sem);
++ }
++
++ return err;
++}
++
++EXPORT_SYMBOL(ext3_init_tree_desc);
++EXPORT_SYMBOL(ext3_mark_inode_dirty);
++EXPORT_SYMBOL(ext3_ext_invalidate_cache);
++EXPORT_SYMBOL(ext3_ext_insert_extent);
++EXPORT_SYMBOL(ext3_ext_walk_space);
++EXPORT_SYMBOL(ext3_ext_find_goal);
++EXPORT_SYMBOL(ext3_ext_calc_credits_for_insert);
+Index: linux-2.6.5-sles9/fs/ext3/ialloc.c
+===================================================================
+--- linux-2.6.5-sles9.orig/fs/ext3/ialloc.c 2005-02-23 01:01:52.366281264 +0300
++++ linux-2.6.5-sles9/fs/ext3/ialloc.c 2005-02-23 01:02:37.398435336 +0300
+@@ -566,7 +566,7 @@ repeat:
+ ei->i_dir_start_lookup = 0;
+ ei->i_disksize = 0;
+
+- ei->i_flags = EXT3_I(dir)->i_flags & ~EXT3_INDEX_FL;
++ ei->i_flags = EXT3_I(dir)->i_flags & ~(EXT3_INDEX_FL|EXT3_EXTENTS_FL);
+ if (S_ISLNK(mode))
+ ei->i_flags &= ~(EXT3_IMMUTABLE_FL|EXT3_APPEND_FL);
+ /* dirsync only applies to directories */
+@@ -647,6 +647,18 @@
+ DQUOT_FREE_INODE(inode);
+ goto fail2;
+ }
++ if (test_opt(sb, EXTENTS) && S_ISREG(inode->i_mode)) {
++ EXT3_I(inode)->i_flags |= EXT3_EXTENTS_FL;
++ ext3_extents_initialize_blockmap(handle, inode);
++ if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_EXTENTS)) {
++ err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
++ if (err) goto fail;
++ EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_EXTENTS);
++ BUFFER_TRACE(EXT3_SB(sb)->s_sbh, "call ext3_journal_dirty_metadata");
++ err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
++ }
++ }
++
+ err = ext3_mark_inode_dirty(handle, inode);
+ if (err) {
+ ext3_std_error(sb, err);
+Index: linux-2.6.5-sles9/fs/ext3/inode.c
+===================================================================
+--- linux-2.6.5-sles9.orig/fs/ext3/inode.c 2005-02-23 01:01:52.373280200 +0300
++++ linux-2.6.5-sles9/fs/ext3/inode.c 2005-02-23 01:02:37.404434424 +0300
+@@ -796,6 +796,17 @@
+ goto reread;
+ }
+
++static inline int
++ext3_get_block_wrap(handle_t *handle, struct inode *inode, long block,
++ struct buffer_head *bh, int create, int extend_disksize)
++{
++ if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL)
++ return ext3_ext_get_block(handle, inode, block, bh, create,
++ extend_disksize);
++ return ext3_get_block_handle(handle, inode, block, bh, create,
++ extend_disksize);
++}
++
+ static int ext3_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
+ {
+@@ -806,8 +817,8 @@
+ handle = ext3_journal_current_handle();
+ J_ASSERT(handle != 0);
+ }
+- ret = ext3_get_block_handle(handle, inode, iblock,
+- bh_result, create, 1);
++ ret = ext3_get_block_wrap(handle, inode, iblock,
++ bh_result, create, 1);
+ return ret;
+ }
+
+@@ -833,8 +844,8 @@
+
+ get_block:
+ if (ret == 0)
+- ret = ext3_get_block_handle(handle, inode, iblock,
+- bh_result, create, 0);
++ ret = ext3_get_block_wrap(handle, inode, iblock,
++ bh_result, create, 0);
+ bh_result->b_size = (1 << inode->i_blkbits);
+ return ret;
+ }
+@@ -855,7 +866,7 @@
+ dummy.b_state = 0;
+ dummy.b_blocknr = -1000;
+ buffer_trace_init(&dummy.b_history);
+- *errp = ext3_get_block_handle(handle, inode, block, &dummy, create, 1);
++ *errp = ext3_get_block_wrap(handle, inode, block, &dummy, create, 1);
+ if (!*errp && buffer_mapped(&dummy)) {
+ struct buffer_head *bh;
+ bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
+@@ -1587,7 +1598,7 @@
+ * This required during truncate. We need to physically zero the tail end
+ * of that block so it doesn't yield old data if the file is later grown.
+ */
+-static int ext3_block_truncate_page(handle_t *handle, struct page *page,
++int ext3_block_truncate_page(handle_t *handle, struct page *page,
+ struct address_space *mapping, loff_t from)
+ {
+ unsigned long index = from >> PAGE_CACHE_SHIFT;
+@@ -2083,6 +2094,9 @@
+ return;
+ }
+
++ if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL)
++ return ext3_ext_truncate(inode, page);
++
+ handle = start_transaction(inode);
+ if (IS_ERR(handle)) {
+ if (page) {
+@@ -2789,6 +2803,9 @@
+ int indirects = (EXT3_NDIR_BLOCKS % bpp) ? 5 : 3;
+ int ret;
+
++ if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL)
++ return ext3_ext_writepage_trans_blocks(inode, bpp);
++
+ if (ext3_should_journal_data(inode))
+ ret = 3 * (bpp + indirects) + 2;
+ else
+Index: linux-2.6.5-sles9/fs/ext3/Makefile
+===================================================================
+--- linux-2.6.5-sles9.orig/fs/ext3/Makefile 2005-02-23 01:01:46.501172896 +0300
++++ linux-2.6.5-sles9/fs/ext3/Makefile 2005-02-23 01:02:37.405434272 +0300
+@@ -5,7 +5,8 @@
+ obj-$(CONFIG_EXT3_FS) += ext3.o
+
+ ext3-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \
+- ioctl.o namei.o super.o symlink.o hash.o resize.o iopen.o
++ ioctl.o namei.o super.o symlink.o hash.o resize.o iopen.o \
++ extents.o
+
+ ext3-$(CONFIG_EXT3_FS_XATTR) += xattr.o xattr_user.o xattr_trusted.o
+ ext3-$(CONFIG_EXT3_FS_POSIX_ACL) += acl.o
+Index: linux-2.6.5-sles9/fs/ext3/super.c
+===================================================================
+--- linux-2.6.5-sles9.orig/fs/ext3/super.c 2005-02-23 01:02:34.072940888 +0300
++++ linux-2.6.5-sles9/fs/ext3/super.c 2005-02-23 01:47:15.291333736 +0300
+@@ -389,6 +389,7 @@
+ struct ext3_super_block *es = sbi->s_es;
+ int i;
+
++ ext3_ext_release(sb);
+ ext3_xattr_put_super(sb);
+ journal_destroy(sbi->s_journal);
+ if (!(sb->s_flags & MS_RDONLY)) {
+@@ -447,7 +448,8 @@
+ dynlock_init(&ei->i_htree_lock);
+ sema_init(&ei->i_rename_sem, 1);
+ sema_init(&ei->i_append_sem, 1);
++ memset(&ei->i_cached_extent, 0, sizeof(ei->i_cached_extent));
+ return &ei->vfs_inode;
+ }
+
+ static void ext3_destroy_inode(struct inode *inode)
+@@ -537,6 +540,7 @@
+ Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_pdirops,
+ Opt_iopen, Opt_noiopen, Opt_iopen_nopriv,
+ Opt_ignore, Opt_barrier, Opt_err, Opt_resize,
++ Opt_extents, Opt_extdebug,
+ };
+
+ static match_table_t tokens = {
+@@ -582,6 +585,8 @@
+ {Opt_iopen, "iopen"},
+ {Opt_noiopen, "noiopen"},
+ {Opt_iopen_nopriv, "iopen_nopriv"},
++ {Opt_extents, "extents"},
++ {Opt_extdebug, "extdebug"},
+ {Opt_err, NULL},
+ {Opt_resize, "resize"},
+ };
+@@ -797,6 +802,12 @@
+ break;
+ case Opt_ignore:
+ break;
++ case Opt_extents:
++ set_opt (sbi->s_mount_opt, EXTENTS);
++ break;
++ case Opt_extdebug:
++ set_opt (sbi->s_mount_opt, EXTDEBUG);
++ break;
+ default:
+ printk (KERN_ERR
+ "EXT3-fs: Unrecognized mount option \"%s\" "
+@@ -1449,6 +1460,8 @@
+ percpu_counter_mod(&sbi->s_dirs_counter,
+ ext3_count_dirs(sb));
+
++ ext3_ext_init(sb);
++
+ return 0;
+
+ failed_mount3:
+Index: linux-2.6.5-sles9/fs/ext3/ioctl.c
+===================================================================
+--- linux-2.6.5-sles9.orig/fs/ext3/ioctl.c 2005-02-23 01:01:42.887722224 +0300
++++ linux-2.6.5-sles9/fs/ext3/ioctl.c 2005-02-23 01:02:37.412433208 +0300
+@@ -124,6 +124,10 @@
+ err = ext3_change_inode_journal_flag(inode, jflag);
+ return err;
+ }
++ case EXT3_IOC_GET_EXTENTS:
++ case EXT3_IOC_GET_TREE_STATS:
++ case EXT3_IOC_GET_TREE_DEPTH:
++ return ext3_ext_ioctl(inode, filp, cmd, arg);
+ case EXT3_IOC_GETVERSION:
+ case EXT3_IOC_GETVERSION_OLD:
+ return put_user(inode->i_generation, (int *) arg);
+Index: linux-2.6.5-sles9/include/linux/ext3_fs.h
+===================================================================
+--- linux-2.6.5-sles9.orig/include/linux/ext3_fs.h 2005-02-23 01:02:35.823674736 +0300
++++ linux-2.6.5-sles9/include/linux/ext3_fs.h 2005-02-23 01:02:37.414432904 +0300
+@@ -186,8 +186,9 @@
+ #define EXT3_NOTAIL_FL 0x00008000 /* don't merge file tail */
+ #define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
+ #define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
++#define EXT3_EXTENTS_FL 0x00080000 /* Inode uses extents */
+ #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
+
+-#define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
++#define EXT3_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */
+ #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
+
+@@ -211,6 +212,9 @@
+ #endif
+ #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
+ #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
++#define EXT3_IOC_GET_EXTENTS _IOR('f', 7, long)
++#define EXT3_IOC_GET_TREE_DEPTH _IOR('f', 8, long)
++#define EXT3_IOC_GET_TREE_STATS _IOR('f', 9, long)
+
+ /*
+ * Structure of an inode on the disk
+@@ -333,6 +337,8 @@
+ #define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */
+ #define EXT3_MOUNT_IOPEN 0x40000 /* Allow access via iopen */
+ #define EXT3_MOUNT_IOPEN_NOPRIV 0x80000 /* Make iopen world-readable */
++#define EXT3_MOUNT_EXTENTS 0x100000/* Extents support */
++#define EXT3_MOUNT_EXTDEBUG 0x200000/* Extents debug */
+
+ /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
+ #ifndef clear_opt
+@@ -503,11 +509,13 @@
+ #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
+ #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
+ #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
++#define EXT3_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */
+
+ #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
+ #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
+ EXT3_FEATURE_INCOMPAT_RECOVER| \
+- EXT3_FEATURE_INCOMPAT_META_BG)
++ EXT3_FEATURE_INCOMPAT_META_BG| \
++ EXT3_FEATURE_INCOMPAT_EXTENTS)
+ #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
+ EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
+ EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
+@@ -729,6 +735,7 @@
+
+
+ /* inode.c */
++extern int ext3_block_truncate_page(handle_t *, struct page *, struct address_space *, loff_t);
+ extern int ext3_forget(handle_t *, int, struct inode *, struct buffer_head *, int);
+ extern struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
+ extern struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
+@@ -802,6 +809,16 @@
+ extern struct inode_operations ext3_symlink_inode_operations;
+ extern struct inode_operations ext3_fast_symlink_inode_operations;
+
++/* extents.c */
++extern int ext3_ext_writepage_trans_blocks(struct inode *, int);
++extern int ext3_ext_get_block(handle_t *, struct inode *, long,
++ struct buffer_head *, int, int);
++extern void ext3_ext_truncate(struct inode *, struct page *);
++extern void ext3_ext_init(struct super_block *);
++extern void ext3_ext_release(struct super_block *);
++extern void ext3_extents_initialize_blockmap(handle_t *, struct inode *);
++extern int ext3_ext_ioctl(struct inode *inode, struct file *filp,
++ unsigned int cmd, unsigned long arg);
+
+ #endif /* __KERNEL__ */
+
+Index: linux-2.6.5-sles9/include/linux/ext3_extents.h
+===================================================================
+--- linux-2.6.5-sles9.orig/include/linux/ext3_extents.h 2005-02-17 22:07:57.023609040 +0300
++++ linux-2.6.5-sles9/include/linux/ext3_extents.h 2005-02-23 01:02:37.416432600 +0300
+@@ -0,0 +1,264 @@
++/*
++ * Copyright (c) 2003, Cluster File Systems, Inc, info@clusterfs.com
++ * Written by Alex Tomas <alex@clusterfs.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public Licens
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-
++ */
++
++#ifndef _LINUX_EXT3_EXTENTS
++#define _LINUX_EXT3_EXTENTS
++
++/*
++ * with AGRESSIVE_TEST defined capacity of index/leaf blocks
++ * become very little, so index split, in-depth growing and
++ * other hard changes happens much more often
++ * this is for debug purposes only
++ */
++#define AGRESSIVE_TEST_
++
++/*
++ * if CHECK_BINSEARCH defined, then results of binary search
++ * will be checked by linear search
++ */
++#define CHECK_BINSEARCH_
++
++/*
++ * if EXT_DEBUG is defined you can use 'extdebug' mount option
++ * to get lots of info what's going on
++ */
++#define EXT_DEBUG_
++#ifdef EXT_DEBUG
++#define ext_debug(tree,fmt,a...) \
++do { \
++ if (test_opt((tree)->inode->i_sb, EXTDEBUG)) \
++ printk(fmt, ##a); \
++} while (0);
++#else
++#define ext_debug(tree,fmt,a...)
++#endif
++
++/*
++ * if EXT_STATS is defined then stats numbers are collected
++ * these number will be displayed at umount time
++ */
++#define EXT_STATS_
++
++
++#define EXT3_ALLOC_NEEDED 3 /* block bitmap + group desc. + sb */
++
++/*
++ * ext3_inode has i_block array (total 60 bytes)
++ * first 4 bytes are used to store:
++ * - tree depth (0 mean there is no tree yet. all extents in the inode)
++ * - number of alive extents in the inode
++ */
++
++/*
++ * this is extent on-disk structure
++ * it's used at the bottom of the tree
++ */
++struct ext3_extent {
++ __u32 ee_block; /* first logical block extent covers */
++ __u16 ee_len; /* number of blocks covered by extent */
++ __u16 ee_start_hi; /* high 16 bits of physical block */
++ __u32 ee_start; /* low 32 bigs of physical block */
++};
++
++/*
++ * this is index on-disk structure
++ * it's used at all the levels, but the bottom
++ */
++struct ext3_extent_idx {
++ __u32 ei_block; /* index covers logical blocks from 'block' */
++ __u32 ei_leaf; /* pointer to the physical block of the next *
++ * level. leaf or next index could bet here */
++ __u16 ei_leaf_hi; /* high 16 bits of physical block */
++ __u16 ei_unused;
++};
++
++/*
++ * each block (leaves and indexes), even inode-stored has header
++ */
++struct ext3_extent_header {
++ __u16 eh_magic; /* probably will support different formats */
++ __u16 eh_entries; /* number of valid entries */
++ __u16 eh_max; /* capacity of store in entries */
++ __u16 eh_depth; /* has tree real underlaying blocks? */
++ __u32 eh_generation; /* generation of the tree */
++};
++
++#define EXT3_EXT_MAGIC 0xf30a
++
++/*
++ * array of ext3_ext_path contains path to some extent
++ * creation/lookup routines use it for traversal/splitting/etc
++ * truncate uses it to simulate recursive walking
++ */
++struct ext3_ext_path {
++ __u32 p_block;
++ __u16 p_depth;
++ struct ext3_extent *p_ext;
++ struct ext3_extent_idx *p_idx;
++ struct ext3_extent_header *p_hdr;
++ struct buffer_head *p_bh;
++};
++
++/*
++ * structure for external API
++ */
+
-+out_stop:
-+ /*
-+ * If this was a simple ftruncate(), and the file will remain alive
-+ * then we need to clear up the orphan record which we created above.
-+ * However, if this was a real unlink then we were called by
-+ * ext3_delete_inode(), and we allow that function to clean up the
-+ * orphan info for us.
-+ */
-+ if (inode->i_nlink)
-+ ext3_orphan_del(handle, inode);
++/*
++ * storage for cached extent
++ */
++struct ext3_ext_cache {
++ __u32 ec_start;
++ __u32 ec_block;
++ __u32 ec_len;
++ __u32 ec_type;
++};
+
-+ up(&EXT3_I(inode)->truncate_sem);
-+ ext3_journal_stop(handle);
-+}
++#define EXT3_EXT_CACHE_NO 0
++#define EXT3_EXT_CACHE_GAP 1
++#define EXT3_EXT_CACHE_EXTENT 2
+
+/*
-+ * this routine calculate max number of blocks we could modify
-+ * in order to allocate new block for an inode
++ * ext3_extents_tree is used to pass initial information
++ * to top-level extents API
+ */
-+int ext3_ext_writepage_trans_blocks(struct inode *inode, int num)
-+{
-+ struct ext3_extents_tree tree;
-+ int needed;
-+
-+ ext3_init_tree_desc(&tree, inode);
-+
-+ needed = ext3_ext_calc_credits_for_insert(&tree, NULL);
++struct ext3_extents_helpers;
++struct ext3_extents_tree {
++ struct inode *inode; /* inode which tree belongs to */
++ void *root; /* ptr to data top of tree resides at */
++ void *buffer; /* will be passed as arg to ^^ routines */
++ int buffer_len;
++ void *private;
++ struct ext3_ext_cache *cex;/* last found extent */
++ struct ext3_extents_helpers *ops;
++};
+
-+ /* caller want to allocate num blocks */
-+ needed *= num;
-+
-+#ifdef CONFIG_QUOTA
-+ /*
-+ * FIXME: real calculation should be here
-+ * it depends on blockmap format of qouta file
-+ */
-+ needed += 2 * EXT3_SINGLEDATA_TRANS_BLOCKS;
-+#endif
++struct ext3_extents_helpers {
++ int (*get_write_access)(handle_t *h, void *buffer);
++ int (*mark_buffer_dirty)(handle_t *h, void *buffer);
++ int (*mergable)(struct ext3_extent *ex1, struct ext3_extent *ex2);
++ int (*remove_extent_credits)(struct ext3_extents_tree *,
++ struct ext3_extent *, unsigned long,
++ unsigned long);
++ int (*remove_extent)(struct ext3_extents_tree *,
++ struct ext3_extent *, unsigned long,
++ unsigned long);
++ int (*new_block)(handle_t *, struct ext3_extents_tree *,
++ struct ext3_ext_path *, struct ext3_extent *,
++ int *);
++};
+
-+ return needed;
-+}
++/*
++ * to be called by ext3_ext_walk_space()
++ * negative retcode - error
++ * positive retcode - signal for ext3_ext_walk_space(), see below
++ * callback must return valid extent (passed or newly created)
++ */
++typedef int (*ext_prepare_callback)(struct ext3_extents_tree *,
++ struct ext3_ext_path *,
++ struct ext3_ext_cache *);
+
-+void ext3_extents_initialize_blockmap(handle_t *handle, struct inode *inode)
-+{
-+ struct ext3_extents_tree tree;
++#define EXT_CONTINUE 0
++#define EXT_BREAK 1
++#define EXT_REPEAT 2
+
-+ ext3_init_tree_desc(&tree, inode);
-+ ext3_extent_tree_init(handle, &tree);
-+}
+
-+int ext3_ext_calc_blockmap_metadata(struct inode *inode, int blocks)
-+{
-+ struct ext3_extents_tree tree;
++#define EXT_MAX_BLOCK 0xffffffff
+
-+ ext3_init_tree_desc(&tree, inode);
-+ return ext3_ext_calc_metadata_amount(&tree, blocks);
-+}
-+
-+static int
-+ext3_ext_store_extent_cb(struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path,
-+ struct ext3_extent *newex, int exist)
-+{
-+ struct ext3_extent_buf *buf = (struct ext3_extent_buf *) tree->private;
+
-+ if (!exist)
-+ return EXT_CONTINUE;
-+ if (buf->err < 0)
-+ return EXT_BREAK;
-+ if (buf->cur - buf->buffer + sizeof(*newex) > buf->buflen)
-+ return EXT_BREAK;
++#define EXT_FIRST_EXTENT(__hdr__) \
++ ((struct ext3_extent *) (((char *) (__hdr__)) + \
++ sizeof(struct ext3_extent_header)))
++#define EXT_FIRST_INDEX(__hdr__) \
++ ((struct ext3_extent_idx *) (((char *) (__hdr__)) + \
++ sizeof(struct ext3_extent_header)))
++#define EXT_HAS_FREE_INDEX(__path__) \
++ ((__path__)->p_hdr->eh_entries < (__path__)->p_hdr->eh_max)
++#define EXT_LAST_EXTENT(__hdr__) \
++ (EXT_FIRST_EXTENT((__hdr__)) + (__hdr__)->eh_entries - 1)
++#define EXT_LAST_INDEX(__hdr__) \
++ (EXT_FIRST_INDEX((__hdr__)) + (__hdr__)->eh_entries - 1)
++#define EXT_MAX_EXTENT(__hdr__) \
++ (EXT_FIRST_EXTENT((__hdr__)) + (__hdr__)->eh_max - 1)
++#define EXT_MAX_INDEX(__hdr__) \
++ (EXT_FIRST_INDEX((__hdr__)) + (__hdr__)->eh_max - 1)
+
-+ if (!copy_to_user(buf->cur, newex, sizeof(*newex))) {
-+ buf->err++;
-+ buf->cur += sizeof(*newex);
-+ } else {
-+ buf->err = -EFAULT;
-+ return EXT_BREAK;
-+ }
-+ return EXT_CONTINUE;
-+}
++#define EXT_ROOT_HDR(tree) \
++ ((struct ext3_extent_header *) (tree)->root)
++#define EXT_BLOCK_HDR(bh) \
++ ((struct ext3_extent_header *) (bh)->b_data)
++#define EXT_DEPTH(_t_) \
++ (((struct ext3_extent_header *)((_t_)->root))->eh_depth)
++#define EXT_GENERATION(_t_) \
++ (((struct ext3_extent_header *)((_t_)->root))->eh_generation)
+
-+static int
-+ext3_ext_collect_stats_cb(struct ext3_extents_tree *tree,
-+ struct ext3_ext_path *path,
-+ struct ext3_extent *ex, int exist)
-+{
-+ struct ext3_extent_tree_stats *buf =
-+ (struct ext3_extent_tree_stats *) tree->private;
-+ int depth;
+
-+ if (!exist)
-+ return EXT_CONTINUE;
++#define EXT_ASSERT(__x__) if (!(__x__)) BUG();
+
-+ depth = EXT_DEPTH(tree);
-+ buf->extents_num++;
-+ if (path[depth].p_ext == EXT_FIRST_EXTENT(path[depth].p_hdr))
-+ buf->leaf_num++;
-+ return EXT_CONTINUE;
++#define EXT_CHECK_PATH(tree,path) \
++{ \
++ int depth = EXT_DEPTH(tree); \
++ BUG_ON((unsigned long) (path) < __PAGE_OFFSET); \
++ BUG_ON((unsigned long) (path)[depth].p_idx < \
++ __PAGE_OFFSET && (path)[depth].p_idx != NULL); \
++ BUG_ON((unsigned long) (path)[depth].p_ext < \
++ __PAGE_OFFSET && (path)[depth].p_ext != NULL); \
++ BUG_ON((unsigned long) (path)[depth].p_hdr < __PAGE_OFFSET); \
++ BUG_ON((unsigned long) (path)[depth].p_bh < __PAGE_OFFSET \
++ && depth != 0); \
++ BUG_ON((path)[0].p_depth != depth); \
+}
+
-+int ext3_ext_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
-+ unsigned long arg)
-+{
-+ int err = 0;
-+
-+ if (!(EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL))
-+ return -EINVAL;
-+
-+ if (cmd == EXT3_IOC_GET_EXTENTS) {
-+ struct ext3_extent_buf buf;
-+ struct ext3_extents_tree tree;
+
-+ if (copy_from_user(&buf, (void *) arg, sizeof(buf)))
-+ return -EFAULT;
++/*
++ * this structure is used to gather extents from the tree via ioctl
++ */
++struct ext3_extent_buf {
++ unsigned long start;
++ int buflen;
++ void *buffer;
++ void *cur;
++ int err;
++};
+
-+ ext3_init_tree_desc(&tree, inode);
-+ buf.cur = buf.buffer;
-+ buf.err = 0;
-+ tree.private = &buf;
-+ down(&EXT3_I(inode)->truncate_sem);
-+ err = ext3_ext_walk_space(&tree, buf.start, EXT_MAX_BLOCK,
-+ ext3_ext_store_extent_cb);
-+ up(&EXT3_I(inode)->truncate_sem);
-+ if (err == 0)
-+ err = buf.err;
-+ } else if (cmd == EXT3_IOC_GET_TREE_STATS) {
-+ struct ext3_extent_tree_stats buf;
-+ struct ext3_extents_tree tree;
++/*
++ * this structure is used to collect stats info about the tree
++ */
++struct ext3_extent_tree_stats {
++ int depth;
++ int extents_num;
++ int leaf_num;
++};
+
-+ ext3_init_tree_desc(&tree, inode);
-+ down(&EXT3_I(inode)->truncate_sem);
-+ buf.depth = EXT_DEPTH(&tree);
-+ buf.extents_num = 0;
-+ buf.leaf_num = 0;
-+ tree.private = &buf;
-+ err = ext3_ext_walk_space(&tree, 0, EXT_MAX_BLOCK,
-+ ext3_ext_collect_stats_cb);
-+ up(&EXT3_I(inode)->truncate_sem);
-+ if (!err)
-+ err = copy_to_user((void *) arg, &buf, sizeof(buf));
-+ } else if (cmd == EXT3_IOC_GET_TREE_DEPTH) {
-+ struct ext3_extents_tree tree;
-+ ext3_init_tree_desc(&tree, inode);
-+ down(&EXT3_I(inode)->truncate_sem);
-+ err = EXT_DEPTH(&tree);
-+ up(&EXT3_I(inode)->truncate_sem);
-+ }
++extern void ext3_init_tree_desc(struct ext3_extents_tree *, struct inode *);
++extern int ext3_extent_tree_init(handle_t *, struct ext3_extents_tree *);
++extern int ext3_ext_calc_credits_for_insert(struct ext3_extents_tree *, struct ext3_ext_path *);
++extern int ext3_ext_insert_extent(handle_t *, struct ext3_extents_tree *, struct ext3_ext_path *, struct ext3_extent *);
++extern int ext3_ext_walk_space(struct ext3_extents_tree *, unsigned long, unsigned long, ext_prepare_callback);
++extern int ext3_ext_remove_space(struct ext3_extents_tree *, unsigned long, unsigned long);
++extern struct ext3_ext_path * ext3_ext_find_extent(struct ext3_extents_tree *, int, struct ext3_ext_path *);
++extern int ext3_ext_calc_blockmap_metadata(struct inode *, int);
+
-+ return err;
++static inline void
++ext3_ext_invalidate_cache(struct ext3_extents_tree *tree)
++{
++ if (tree->cex)
++ tree->cex->ec_type = EXT3_EXT_CACHE_NO;
+}
+
-+EXPORT_SYMBOL(ext3_init_tree_desc);
-+EXPORT_SYMBOL(ext3_mark_inode_dirty);
-+EXPORT_SYMBOL(ext3_ext_invalidate_cache);
-+EXPORT_SYMBOL(ext3_ext_insert_extent);
-+EXPORT_SYMBOL(ext3_ext_walk_space);
-+EXPORT_SYMBOL(ext3_ext_find_goal);
-+EXPORT_SYMBOL(ext3_ext_calc_credits_for_insert);
+
-Index: linux-2.6.10/fs/ext3/ialloc.c
-===================================================================
---- linux-2.6.10.orig/fs/ext3/ialloc.c 2005-04-05 12:26:19.368143176 +0800
-+++ linux-2.6.10/fs/ext3/ialloc.c 2005-04-05 12:26:25.464216432 +0800
-@@ -644,6 +644,17 @@
- DQUOT_FREE_INODE(inode);
- goto fail2;
- }
-+ if (test_opt(sb, EXTENTS)) {
-+ EXT3_I(inode)->i_flags |= EXT3_EXTENTS_FL;
-+ ext3_extents_initialize_blockmap(handle, inode);
-+ if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_EXTENTS)) {
-+ err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
-+ if (err) goto fail;
-+ EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_EXTENTS);
-+ BUFFER_TRACE(EXT3_SB(sb)->s_sbh, "call ext3_journal_dirty_metadata");
-+ err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
-+ }
-+ }
- err = ext3_mark_inode_dirty(handle, inode);
- if (err) {
- ext3_std_error(sb, err);
-Index: linux-2.6.10/fs/ext3/Makefile
++#endif /* _LINUX_EXT3_EXTENTS */
+Index: linux-2.6.5-sles9/include/linux/ext3_fs_i.h
===================================================================
---- linux-2.6.10.orig/fs/ext3/Makefile 2005-04-05 12:26:06.897039072 +0800
-+++ linux-2.6.10/fs/ext3/Makefile 2005-04-05 12:27:00.597875304 +0800
-@@ -5,8 +5,8 @@
- obj-$(CONFIG_EXT3_FS) += ext3.o
+--- linux-2.6.5-sles9.orig/include/linux/ext3_fs_i.h 2005-02-23 01:01:52.425272296 +0300
++++ linux-2.6.5-sles9/include/linux/ext3_fs_i.h 2005-02-23 01:45:55.611446920 +0300
+@@ -19,6 +19,7 @@
+ #include <linux/rbtree.h>
+ #include <linux/seqlock.h>
+ #include <linux/dynlocks.h>
++#include <linux/ext3_extents.h>
- ext3-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \
-- ioctl.o namei.o super.o symlink.o hash.o resize.o iopen.o
--
-+ ioctl.o namei.o super.o symlink.o hash.o resize.o iopen.o \
-+ extents.o
- ext3-$(CONFIG_EXT3_FS_XATTR) += xattr.o xattr_user.o xattr_trusted.o
- ext3-$(CONFIG_EXT3_FS_POSIX_ACL) += acl.o
- ext3-$(CONFIG_EXT3_FS_SECURITY) += xattr_security.o
+ struct ext3_reserve_window {
+ __u32 _rsv_start; /* First byte reserved */
+@@ -128,6 +129,8 @@
+ struct dynlock i_htree_lock;
+ struct semaphore i_append_sem;
+ struct semaphore i_rename_sem;
++
++ struct ext3_ext_cache i_cached_extent;
+ };
+
+ #endif /* _LINUX_EXT3_FS_I */
%diffstat
- fs/ext3/Makefile | 4
- fs/ext3/extents.c | 2306 +++++++++++++++++++++++++++++++++++++++++++
- fs/ext3/ialloc.c | 11
+ fs/ext3/Makefile | 2
+ fs/ext3/extents.c | 2356 +++++++++++++++++++++++++++++++++++++++++++
+ fs/ext3/ialloc.c | 4
fs/ext3/inode.c | 29
fs/ext3/ioctl.c | 4
fs/ext3/super.c | 15
- include/linux/ext3_extents.h | 238 ++++
- include/linux/ext3_fs.h | 20
- include/linux/ext3_fs_i.h | 2
- 9 files changed, 2619 insertions(+), 10 deletions(-)
+ include/linux/ext3_extents.h | 265 ++++
+ include/linux/ext3_fs.h | 17
+ include/linux/ext3_fs_i.h | 3
+ 9 files changed, 2687 insertions(+), 8 deletions(-)
git://git.whamcloud.com / fs / lustre-release.git / commitdiff