btrfs-y := super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \
hash.o file-item.o inode-item.o inode-map.o disk-io.o \
transaction.o bit-radix.o inode.o file.o tree-defrag.o \
- extent_map.o sysfs.o struct-funcs.o xattr.o acl.o
+ extent_map.o sysfs.o struct-funcs.o xattr.o acl.o ordered-data.o
#btrfs-y := ctree.o disk-io.o radix-tree.o extent-tree.o print-tree.o \
# root-tree.o dir-item.o hash.o file-item.o inode-item.o \
struct extent_map_tree extent_tree;
struct inode vfs_inode;
+ u64 ordered_trans;
/*
* transid of the trans_handle that last modified this inode
*/
struct extent_buffer **cow_ret)
{
u64 search_start;
+ u64 header_trans;
int ret;
+
if (trans->transaction != root->fs_info->running_transaction) {
printk(KERN_CRIT "trans %Lu running %Lu\n", trans->transid,
root->fs_info->running_transaction->transid);
root->fs_info->generation);
WARN_ON(1);
}
- if (btrfs_header_generation(buf) == trans->transid) {
+
+ header_trans = btrfs_header_generation(buf);
+ if (header_trans == trans->transid) {
*cow_ret = buf;
return 0;
}
* Boston, MA 021110-1307, USA.
*/
-#ifndef __BTRFS__
-#define __BTRFS__
+#ifndef __BTRFS_CTREE__
+#define __BTRFS_CTREE__
#include <linux/version.h>
#include <linux/mm.h>
struct inode *inode;
struct kobject root_kobj;
struct completion kobj_unregister;
- struct rw_semaphore snap_sem;
u64 objectid;
u64 last_trans;
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
struct btrfs_root *root);
+struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
+ u64 root_objectid);
int btrfs_commit_write(struct file *file, struct page *page,
unsigned from, unsigned to);
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
memset(&root->defrag_progress, 0, sizeof(root->defrag_progress));
memset(&root->root_kobj, 0, sizeof(root->root_kobj));
init_completion(&root->kobj_unregister);
- init_rwsem(&root->snap_sem);
root->defrag_running = 0;
root->defrag_level = 0;
root->root_key.objectid = objectid;
return root;
}
+struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
+ u64 root_objectid)
+{
+ struct btrfs_root *root;
+
+ if (root_objectid == BTRFS_ROOT_TREE_OBJECTID)
+ return fs_info->tree_root;
+ if (root_objectid == BTRFS_EXTENT_TREE_OBJECTID)
+ return fs_info->extent_root;
+
+ root = radix_tree_lookup(&fs_info->fs_roots_radix,
+ (unsigned long)root_objectid);
+ return root;
+}
+
struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
struct btrfs_key *location)
{
struct btrfs_root *root);
struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
u64 bytenr, u32 blocksize);
+struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
+ u64 root_objectid);
struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
struct btrfs_key *location,
const char *name, int namelen);
if (btrfs_buffer_uptodate(buf)) {
u64 transid =
root->fs_info->running_transaction->transid;
- if (btrfs_header_generation(buf) == transid) {
+ u64 header_transid =
+ btrfs_header_generation(buf);
+ if (header_transid == transid) {
free_extent_buffer(buf);
return 1;
}
#include "disk-io.h"
#include "transaction.h"
#include "btrfs_inode.h"
+#include "ordered-data.h"
#include "ioctl.h"
#include "print-tree.h"
root->fs_info->delalloc_bytes += (end_of_last_block + 1 -
start_pos) - existing_delalloc;
spin_unlock(&root->fs_info->delalloc_lock);
+ btrfs_add_ordered_inode(inode);
} else {
u64 aligned_end;
/* step one, delete the existing extents in this range */
pages = kmalloc(nrptrs * sizeof(struct page *), GFP_KERNEL);
- down_read(&BTRFS_I(inode)->root->snap_sem);
-
mutex_lock(&inode->i_mutex);
first_index = pos >> PAGE_CACHE_SHIFT;
last_index = (pos + count) >> PAGE_CACHE_SHIFT;
}
out:
mutex_unlock(&inode->i_mutex);
- up_read(&BTRFS_I(inode)->root->snap_sem);
out_nolock:
kfree(pages);
alloc_hint = ins.objectid + ins.offset;
start += cur_alloc_size;
}
+ btrfs_add_ordered_inode(inode);
out:
btrfs_end_transaction(trans, root);
return ret;
path = btrfs_alloc_path();
BUG_ON(!path);
mutex_lock(&root->fs_info->fs_mutex);
-
memcpy(&location, &BTRFS_I(inode)->location, sizeof(location));
+
ret = btrfs_lookup_inode(NULL, root, path, &location, 0);
if (ret)
goto make_bad;
if ((offset & (blocksize - 1)) == 0)
goto out;
- down_read(&root->snap_sem);
ret = -ENOMEM;
page = grab_cache_page(mapping, index);
if (!page)
unlock_page(page);
page_cache_release(page);
- up_read(&BTRFS_I(inode)->root->snap_sem);
out:
return ret;
}
args->root == BTRFS_I(inode)->root);
}
+struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
+ u64 root_objectid)
+{
+ struct btrfs_iget_args args;
+ args.ino = objectid;
+ args.root = btrfs_lookup_fs_root(btrfs_sb(s)->fs_info, root_objectid);
+
+ if (!args.root)
+ return NULL;
+
+ return ilookup5(s, objectid, btrfs_find_actor, (void *)&args);
+}
+
struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
struct btrfs_root *root)
{
d_type = btrfs_filetype_table[btrfs_dir_type(leaf, di)];
btrfs_dir_item_key_to_cpu(leaf, di, &location);
-
over = filldir(dirent, name_ptr, name_len,
found_key.offset,
location.objectid,
ret = -EINVAL;
- down_read(&BTRFS_I(inode)->root->snap_sem);
lock_page(page);
wait_on_page_writeback(page);
size = i_size_read(inode);
ret = btrfs_cow_one_page(inode, page, end);
out_unlock:
- up_read(&BTRFS_I(inode)->root->snap_sem);
unlock_page(page);
out:
return ret;
struct btrfs_root_item root_item;
struct btrfs_inode_item *inode_item;
struct extent_buffer *leaf;
- struct btrfs_root *new_root;
+ struct btrfs_root *new_root = root;
struct inode *inode;
struct inode *dir;
int ret;
goto fail;
fail:
nr = trans->blocks_used;
- err = btrfs_commit_transaction(trans, root);
+ err = btrfs_commit_transaction(trans, new_root);
if (err && !ret)
ret = err;
fail_commit:
if (!root->ref_cows)
return -EINVAL;
- down_write(&root->snap_sem);
- freeze_bdev(root->fs_info->sb->s_bdev);
- thaw_bdev(root->fs_info->sb->s_bdev, root->fs_info->sb);
-
mutex_lock(&root->fs_info->fs_mutex);
ret = btrfs_check_free_space(root, 1, 0);
if (ret)
trans = btrfs_start_transaction(root, 1);
BUG_ON(!trans);
+ err = btrfs_commit_transaction(trans, root);
+
+ trans = btrfs_start_transaction(root, 1);
ret = btrfs_update_inode(trans, root, root->inode);
if (ret)
ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root,
0, &objectid);
if (ret)
- goto fail;
-
- memcpy(&new_root_item, &root->root_item,
+ goto fail; memcpy(&new_root_item, &root->root_item,
sizeof(new_root_item));
key.objectid = objectid;
btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp);
free_extent_buffer(tmp);
+ /* write the ordered inodes to force all delayed allocations to
+ * be filled. Once this is done, we can copy the root
+ */
+ mutex_lock(&root->fs_info->trans_mutex);
+ btrfs_write_ordered_inodes(trans, root);
+ mutex_unlock(&root->fs_info->trans_mutex);
+
btrfs_copy_root(trans, root, root->node, &tmp, objectid);
btrfs_set_root_bytenr(&new_root_item, tmp->start);
btrfs_set_root_level(&new_root_item, btrfs_header_level(tmp));
ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
&new_root_item);
+printk("new root %Lu node %Lu\n", objectid, tmp->start);
free_extent_buffer(tmp);
if (ret)
goto fail;
ret = err;
fail_unlock:
mutex_unlock(&root->fs_info->fs_mutex);
- up_write(&root->snap_sem);
btrfs_btree_balance_dirty(root, nr);
return ret;
}
if (!ei)
return NULL;
ei->last_trans = 0;
+ ei->ordered_trans = 0;
return &ei->vfs_inode;
}
--- /dev/null
+/*
+ * Copyright (C) 2007 Oracle. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 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
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include <linux/gfp.h>
+#include <linux/slab.h>
+#include "ctree.h"
+#include "transaction.h"
+#include "btrfs_inode.h"
+
+struct tree_entry {
+ u64 root_objectid;
+ u64 objectid;
+ struct rb_node rb_node;
+};
+
+/*
+ * returns > 0 if entry passed (root, objectid) is > entry,
+ * < 0 if (root, objectid) < entry and zero if they are equal
+ */
+static int comp_entry(struct tree_entry *entry, u64 root_objectid,
+ u64 objectid)
+{
+ if (root_objectid < entry->root_objectid)
+ return -1;
+ if (root_objectid > entry->root_objectid)
+ return 1;
+ if (objectid < entry->objectid)
+ return -1;
+ if (objectid > entry->objectid)
+ return 1;
+ return 0;
+}
+
+static struct rb_node *tree_insert(struct rb_root *root, u64 root_objectid,
+ u64 objectid, struct rb_node *node)
+{
+ struct rb_node ** p = &root->rb_node;
+ struct rb_node * parent = NULL;
+ struct tree_entry *entry;
+ int comp;
+
+ while(*p) {
+ parent = *p;
+ entry = rb_entry(parent, struct tree_entry, rb_node);
+
+ comp = comp_entry(entry, root_objectid, objectid);
+ if (comp < 0)
+ p = &(*p)->rb_left;
+ else if (comp > 0)
+ p = &(*p)->rb_right;
+ else
+ return parent;
+ }
+
+ rb_link_node(node, parent, p);
+ rb_insert_color(node, root);
+ return NULL;
+}
+
+static struct rb_node *__tree_search(struct rb_root *root, u64 root_objectid,
+ u64 objectid, struct rb_node **prev_ret)
+{
+ struct rb_node * n = root->rb_node;
+ struct rb_node *prev = NULL;
+ struct tree_entry *entry;
+ struct tree_entry *prev_entry = NULL;
+ int comp;
+
+ while(n) {
+ entry = rb_entry(n, struct tree_entry, rb_node);
+ prev = n;
+ prev_entry = entry;
+ comp = comp_entry(entry, root_objectid, objectid);
+
+ if (comp < 0)
+ n = n->rb_left;
+ else if (comp > 0)
+ n = n->rb_right;
+ else
+ return n;
+ }
+ if (!prev_ret)
+ return NULL;
+
+ while(prev && comp_entry(prev_entry, root_objectid, objectid) >= 0) {
+ prev = rb_next(prev);
+ prev_entry = rb_entry(prev, struct tree_entry, rb_node);
+ }
+ *prev_ret = prev;
+ return NULL;
+}
+
+static inline struct rb_node *tree_search(struct rb_root *root,
+ u64 root_objectid, u64 objectid)
+{
+ struct rb_node *prev;
+ struct rb_node *ret;
+ ret = __tree_search(root, root_objectid, objectid, &prev);
+ if (!ret)
+ return prev;
+ return ret;
+}
+
+int btrfs_add_ordered_inode(struct inode *inode)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ u64 root_objectid = root->root_key.objectid;
+ u64 transid = root->fs_info->running_transaction->transid;
+ struct tree_entry *entry;
+ struct rb_node *node;
+ struct btrfs_ordered_inode_tree *tree;
+
+ if (transid <= BTRFS_I(inode)->ordered_trans)
+ return 0;
+
+ tree = &root->fs_info->running_transaction->ordered_inode_tree;
+
+ read_lock(&tree->lock);
+ node = __tree_search(&tree->tree, root_objectid, inode->i_ino, NULL);
+ read_unlock(&tree->lock);
+ if (node) {
+ return 0;
+ }
+
+ entry = kmalloc(sizeof(*entry), GFP_NOFS);
+ if (!entry)
+ return -ENOMEM;
+
+ write_lock(&tree->lock);
+ entry->objectid = inode->i_ino;
+ entry->root_objectid = root_objectid;
+
+ node = tree_insert(&tree->tree, root_objectid,
+ inode->i_ino, &entry->rb_node);
+
+ BTRFS_I(inode)->ordered_trans = transid;
+
+ write_unlock(&tree->lock);
+ if (node)
+ kfree(entry);
+ return 0;
+}
+
+int btrfs_find_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
+ u64 *root_objectid, u64 *objectid)
+{
+ struct tree_entry *entry;
+ struct rb_node *node;
+
+ write_lock(&tree->lock);
+ node = tree_search(&tree->tree, *root_objectid, *objectid);
+ if (!node) {
+ write_unlock(&tree->lock);
+ return 0;
+ }
+ entry = rb_entry(node, struct tree_entry, rb_node);
+
+ while(comp_entry(entry, *root_objectid, *objectid) >= 0) {
+ node = rb_next(node);
+ if (!node)
+ break;
+ entry = rb_entry(node, struct tree_entry, rb_node);
+ }
+ if (!node) {
+ write_unlock(&tree->lock);
+ return 0;
+ }
+
+ *root_objectid = entry->root_objectid;
+ *objectid = entry->objectid;
+ write_unlock(&tree->lock);
+ return 1;
+}
+
+int btrfs_find_del_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
+ u64 *root_objectid, u64 *objectid)
+{
+ struct tree_entry *entry;
+ struct rb_node *node;
+
+ write_lock(&tree->lock);
+ node = tree_search(&tree->tree, *root_objectid, *objectid);
+ if (!node) {
+ write_unlock(&tree->lock);
+ return 0;
+ }
+
+ entry = rb_entry(node, struct tree_entry, rb_node);
+ while(comp_entry(entry, *root_objectid, *objectid) >= 0) {
+ node = rb_next(node);
+ if (!node)
+ break;
+ entry = rb_entry(node, struct tree_entry, rb_node);
+ }
+ if (!node) {
+ write_unlock(&tree->lock);
+ return 0;
+ }
+
+ *root_objectid = entry->root_objectid;
+ *objectid = entry->objectid;
+ rb_erase(node, &tree->tree);
+ write_unlock(&tree->lock);
+ kfree(entry);
+ return 1;
+}
--- /dev/null
+/*
+ * Copyright (C) 2007 Oracle. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 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
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef __BTRFS_ORDERED_DATA__
+#define __BTRFS_ORDERED_DATA__
+
+struct btrfs_ordered_inode_tree {
+ rwlock_t lock;
+ struct rb_root tree;
+};
+
+static inline void
+btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t)
+{
+ rwlock_init(&t->lock);
+ t->tree.rb_node = NULL;
+}
+
+int btrfs_add_ordered_inode(struct inode *inode);
+int btrfs_find_del_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
+ u64 *root_objectid, u64 *objectid);
+int btrfs_find_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
+ u64 *root_objectid, u64 *objectid);
+#endif
cur_trans->commit_done = 0;
cur_trans->start_time = get_seconds();
list_add_tail(&cur_trans->list, &root->fs_info->trans_list);
+ btrfs_ordered_inode_tree_init(&cur_trans->ordered_inode_tree);
extent_map_tree_init(&cur_trans->dirty_pages,
root->fs_info->btree_inode->i_mapping,
GFP_NOFS);
return ret;
}
+int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ struct btrfs_transaction *cur_trans = trans->transaction;
+ struct inode *inode;
+ u64 root_objectid = 0;
+ u64 objectid = 0;
+ u64 transid = trans->transid;
+ int ret;
+
+printk("write ordered trans %Lu\n", transid);
+ while(1) {
+ ret = btrfs_find_first_ordered_inode(
+ &cur_trans->ordered_inode_tree,
+ &root_objectid, &objectid);
+ if (!ret)
+ break;
+
+ mutex_unlock(&root->fs_info->trans_mutex);
+ mutex_unlock(&root->fs_info->fs_mutex);
+ inode = btrfs_ilookup(root->fs_info->sb, objectid,
+ root_objectid);
+ if (inode) {
+ if (S_ISREG(inode->i_mode))
+ filemap_fdatawrite(inode->i_mapping);
+ iput(inode);
+ }
+ mutex_lock(&root->fs_info->fs_mutex);
+ mutex_lock(&root->fs_info->trans_mutex);
+ }
+ while(1) {
+ root_objectid = 0;
+ objectid = 0;
+ ret = btrfs_find_del_first_ordered_inode(
+ &cur_trans->ordered_inode_tree,
+ &root_objectid, &objectid);
+ if (!ret)
+ break;
+ mutex_unlock(&root->fs_info->trans_mutex);
+ mutex_unlock(&root->fs_info->fs_mutex);
+ inode = btrfs_ilookup(root->fs_info->sb, objectid,
+ root_objectid);
+ if (inode) {
+ if (S_ISREG(inode->i_mode))
+ filemap_write_and_wait(inode->i_mapping);
+ iput(inode);
+ }
+ mutex_lock(&root->fs_info->fs_mutex);
+ mutex_lock(&root->fs_info->trans_mutex);
+ }
+printk("done write ordered trans %Lu\n", transid);
+ return 0;
+}
+
int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
mutex_lock(&root->fs_info->fs_mutex);
mutex_lock(&root->fs_info->trans_mutex);
finish_wait(&cur_trans->writer_wait, &wait);
+ ret = btrfs_write_ordered_inodes(trans, root);
+
} while (cur_trans->num_writers > 1 ||
(cur_trans->num_joined != joined));
WARN_ON(cur_trans != trans->transaction);
+
ret = add_dirty_roots(trans, &root->fs_info->fs_roots_radix,
&dirty_fs_roots);
BUG_ON(ret);
* Boston, MA 021110-1307, USA.
*/
-#ifndef __TRANSACTION__
-#define __TRANSACTION__
+#ifndef __BTRFS_TRANSACTION__
+#define __BTRFS_TRANSACTION__
#include "btrfs_inode.h"
+#include "ordered-data.h"
struct btrfs_transaction {
u64 transid;
struct list_head list;
struct extent_map_tree dirty_pages;
unsigned long start_time;
+ struct btrfs_ordered_inode_tree ordered_inode_tree;
wait_queue_head_t writer_wait;
wait_queue_head_t commit_wait;
};
int btrfs_clean_old_snapshots(struct btrfs_root *root);
int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
+int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root);
#endif
projects / profile / ivi / kernel-x86-ivi.git / commitdiff