Btrfs: early fsync support (8fd17795) · Commits · e / devices / android_kernel_oneplus_sm7250

fs/btrfs/TODO

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -7,6 +7,7 @@
	* Get rid of struct ctree_path, limiting tree levels held at one time		* Get rid of struct ctree_path, limiting tree levels held at one time
	* Add generation number to key pointer in nodes		* Add generation number to key pointer in nodes
	* Add parent pointer back to extent map.		* Add parent pointer back to extent map.
			* Implement real list of pending transactions
	* Release		* Release
	* Do real tree locking		* Do real tree locking
	* Add extent mirroring (backup copies of blocks)		* Add extent mirroring (backup copies of blocks)

fs/btrfs/ctree.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -256,6 +256,7 @@ struct btrfs_fs_info {
	struct inode *btree_inode;		struct inode *btree_inode;
	struct mutex trans_mutex;		struct mutex trans_mutex;
	struct mutex fs_mutex;		struct mutex fs_mutex;
			struct list_head trans_list;
	struct crypto_hash *hash_tfm;		struct crypto_hash *hash_tfm;
	spinlock_t hash_lock;		spinlock_t hash_lock;
	struct kobject kobj;		struct kobject kobj;

fs/btrfs/disk-io.c

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -528,6 +528,7 @@ struct btrfs_root open_ctree(struct super_block sb)
	init_bit_radix(&fs_info->pending_del_radix);		init_bit_radix(&fs_info->pending_del_radix);
	INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_NOFS);		INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_NOFS);
	INIT_RADIX_TREE(&fs_info->dev_radix, GFP_NOFS);		INIT_RADIX_TREE(&fs_info->dev_radix, GFP_NOFS);
			INIT_LIST_HEAD(&fs_info->trans_list);
	sb_set_blocksize(sb, 4096);		sb_set_blocksize(sb, 4096);
	fs_info->running_transaction = NULL;		fs_info->running_transaction = NULL;
	fs_info->tree_root = tree_root;		fs_info->tree_root = tree_root;

fs/btrfs/root-tree.c

+0 −1

Original line number	Original line	Diff line number	Diff line
	@@ -100,7 +100,6 @@ int btrfs_del_root(struct btrfs_trans_handle trans, struct btrfs_root root,
	BUG_ON(refs == 0);		BUG_ON(refs == 0);
	if (refs == 1) {		if (refs == 1) {
	ret = btrfs_del_item(trans, root, path);		ret = btrfs_del_item(trans, root, path);
	printk("deleting root %Lu %Lu %u\n", key->objectid, key->offset, key->flags);
	} else {		} else {
	btrfs_set_root_refs(ri, refs - 1);		btrfs_set_root_refs(ri, refs - 1);
	printk("ref now %u root %Lu %Lu %u\n", refs -1, key->objectid, key->offset, key->flags);		printk("ref now %u root %Lu %Lu %u\n", refs -1, key->objectid, key->offset, key->flags);

fs/btrfs/super.c

+36 −1

Original line number	Original line	Diff line number	Diff line
	@@ -11,6 +11,7 @@
	#include <linux/mpage.h>		#include <linux/mpage.h>
	#include <linux/swap.h>		#include <linux/swap.h>
	#include <linux/writeback.h>		#include <linux/writeback.h>
			#include <linux/statfs.h>
	#include "ctree.h"		#include "ctree.h"
	#include "disk-io.h"		#include "disk-io.h"
	#include "transaction.h"		#include "transaction.h"
	@@ -932,6 +933,26 @@ static int btrfs_mkdir(struct inode dir, struct dentry dentry, int mode)
	return err;		return err;
	}		}

			static int btrfs_sync_file(struct file *file,
			struct dentry *dentry, int datasync)
			{
			struct inode *inode = dentry->d_inode;
			struct btrfs_root *root = BTRFS_I(inode)->root;
			int ret;
			struct btrfs_trans_handle *trans;

			mutex_lock(&root->fs_info->fs_mutex);
			trans = btrfs_start_transaction(root, 1);
			if (!trans) {
			ret = -ENOMEM;
			goto out;
			}
			ret = btrfs_commit_transaction(trans, root);
			mutex_unlock(&root->fs_info->fs_mutex);
			out:
			return ret > 0 ? EIO : ret;
			}

	static int btrfs_sync_fs(struct super_block *sb, int wait)		static int btrfs_sync_fs(struct super_block *sb, int wait)
	{		{
	struct btrfs_trans_handle *trans;		struct btrfs_trans_handle *trans;
	@@ -2353,6 +2374,19 @@ static int btrfs_getattr(struct vfsmount *mnt,
	return 0;		return 0;
	}		}

			static int btrfs_statfs(struct dentry dentry, struct kstatfs buf)
			{
			struct btrfs_root *root = btrfs_sb(dentry->d_sb);
			struct btrfs_super_block *disk_super = root->fs_info->disk_super;

			buf->f_namelen = BTRFS_NAME_LEN;
			buf->f_blocks = btrfs_super_total_blocks(disk_super);
			buf->f_bfree = buf->f_blocks - btrfs_super_blocks_used(disk_super);
			buf->f_bavail = buf->f_bfree;
			buf->f_bsize = dentry->d_sb->s_blocksize;
			buf->f_type = BTRFS_SUPER_MAGIC;
			return 0;
			}
	static struct file_system_type btrfs_fs_type = {		static struct file_system_type btrfs_fs_type = {
	.owner = THIS_MODULE,		.owner = THIS_MODULE,
	.name = "btrfs",		.name = "btrfs",
	@@ -2362,7 +2396,6 @@ static struct file_system_type btrfs_fs_type = {
	};		};

	static struct super_operations btrfs_super_ops = {		static struct super_operations btrfs_super_ops = {
	.statfs = simple_statfs,
	.delete_inode = btrfs_delete_inode,		.delete_inode = btrfs_delete_inode,
	.put_super = btrfs_put_super,		.put_super = btrfs_put_super,
	.read_inode = btrfs_read_locked_inode,		.read_inode = btrfs_read_locked_inode,
	@@ -2371,6 +2404,7 @@ static struct super_operations btrfs_super_ops = {
	.write_inode = btrfs_write_inode,		.write_inode = btrfs_write_inode,
	.alloc_inode = btrfs_alloc_inode,		.alloc_inode = btrfs_alloc_inode,
	.destroy_inode = btrfs_destroy_inode,		.destroy_inode = btrfs_destroy_inode,
			.statfs = btrfs_statfs,
	};		};

	static struct inode_operations btrfs_dir_inode_operations = {		static struct inode_operations btrfs_dir_inode_operations = {
	@@ -2413,6 +2447,7 @@ static struct file_operations btrfs_file_operations = {
	.mmap = generic_file_mmap,		.mmap = generic_file_mmap,
	.open = generic_file_open,		.open = generic_file_open,
	.ioctl = btrfs_ioctl,		.ioctl = btrfs_ioctl,
			.fsync = btrfs_sync_file,
	};		};

	static int __init init_btrfs_fs(void)		static int __init init_btrfs_fs(void)