* do a destroy_inode
*/
if (is_bad_inode(inode)) {
- trans = btrfs_start_transaction(root, 1);
+ trans = btrfs_start_transaction(root, 0);
btrfs_orphan_del(trans, inode);
btrfs_end_transaction(trans, root);
iput(inode);
return ret;
}
-static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
+/* helper to check if there is any shared block in the path */
+static int check_path_shared(struct btrfs_root *root,
+ struct btrfs_path *path)
+{
+ struct extent_buffer *eb;
+ int level;
+ int ret;
+ u64 refs;
+
+ for (level = 0; level < BTRFS_MAX_LEVEL; level++) {
+ if (!path->nodes[level])
+ break;
+ eb = path->nodes[level];
+ if (!btrfs_block_can_be_shared(root, eb))
+ continue;
+ ret = btrfs_lookup_extent_info(NULL, root, eb->start, eb->len,
+ &refs, NULL);
+ if (refs > 1)
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * helper to start transaction for unlink and rmdir.
+ *
+ * unlink and rmdir are special in btrfs, they do not always free space.
+ * so in enospc case, we should make sure they will free space before
+ * allowing them to use the global metadata reservation.
+ */
+static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
+ struct dentry *dentry)
{
- struct btrfs_root *root;
struct btrfs_trans_handle *trans;
+ struct btrfs_root *root = BTRFS_I(dir)->root;
+ struct btrfs_path *path;
+ struct btrfs_inode_ref *ref;
+ struct btrfs_dir_item *di;
struct inode *inode = dentry->d_inode;
+ u64 index;
+ int check_link = 1;
+ int err = -ENOSPC;
int ret;
- unsigned long nr = 0;
- root = BTRFS_I(dir)->root;
+ trans = btrfs_start_transaction(root, 10);
+ if (!IS_ERR(trans) || PTR_ERR(trans) != -ENOSPC)
+ return trans;
- /*
- * 5 items for unlink inode
- * 1 for orphan
- */
- ret = btrfs_reserve_metadata_space(root, 6);
- if (ret)
- return ret;
+ if (inode->i_ino == BTRFS_EMPTY_SUBVOL_DIR_OBJECTID)
+ return ERR_PTR(-ENOSPC);
- trans = btrfs_start_transaction(root, 1);
+ /* check if there is someone else holds reference */
+ if (S_ISDIR(inode->i_mode) && atomic_read(&inode->i_count) > 1)
+ return ERR_PTR(-ENOSPC);
+
+ if (atomic_read(&inode->i_count) > 2)
+ return ERR_PTR(-ENOSPC);
+
+ if (xchg(&root->fs_info->enospc_unlink, 1))
+ return ERR_PTR(-ENOSPC);
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ root->fs_info->enospc_unlink = 0;
+ return ERR_PTR(-ENOMEM);
+ }
+
+ trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
- btrfs_unreserve_metadata_space(root, 6);
- return PTR_ERR(trans);
+ btrfs_free_path(path);
+ root->fs_info->enospc_unlink = 0;
+ return trans;
}
+ path->skip_locking = 1;
+ path->search_commit_root = 1;
+
+ ret = btrfs_lookup_inode(trans, root, path,
+ &BTRFS_I(dir)->location, 0);
+ if (ret < 0) {
+ err = ret;
+ goto out;
+ }
+ if (ret == 0) {
+ if (check_path_shared(root, path))
+ goto out;
+ } else {
+ check_link = 0;
+ }
+ btrfs_release_path(root, path);
+
+ ret = btrfs_lookup_inode(trans, root, path,
+ &BTRFS_I(inode)->location, 0);
+ if (ret < 0) {
+ err = ret;
+ goto out;
+ }
+ if (ret == 0) {
+ if (check_path_shared(root, path))
+ goto out;
+ } else {
+ check_link = 0;
+ }
+ btrfs_release_path(root, path);
+
+ if (ret == 0 && S_ISREG(inode->i_mode)) {
+ ret = btrfs_lookup_file_extent(trans, root, path,
+ inode->i_ino, (u64)-1, 0);
+ if (ret < 0) {
+ err = ret;
+ goto out;
+ }
+ BUG_ON(ret == 0);
+ if (check_path_shared(root, path))
+ goto out;
+ btrfs_release_path(root, path);
+ }
+
+ if (!check_link) {
+ err = 0;
+ goto out;
+ }
+
+ di = btrfs_lookup_dir_item(trans, root, path, dir->i_ino,
+ dentry->d_name.name, dentry->d_name.len, 0);
+ if (IS_ERR(di)) {
+ err = PTR_ERR(di);
+ goto out;
+ }
+ if (di) {
+ if (check_path_shared(root, path))
+ goto out;
+ } else {
+ err = 0;
+ goto out;
+ }
+ btrfs_release_path(root, path);
+
+ ref = btrfs_lookup_inode_ref(trans, root, path,
+ dentry->d_name.name, dentry->d_name.len,
+ inode->i_ino, dir->i_ino, 0);
+ if (IS_ERR(ref)) {
+ err = PTR_ERR(ref);
+ goto out;
+ }
+ BUG_ON(!ref);
+ if (check_path_shared(root, path))
+ goto out;
+ index = btrfs_inode_ref_index(path->nodes[0], ref);
+ btrfs_release_path(root, path);
+
+ di = btrfs_lookup_dir_index_item(trans, root, path, dir->i_ino, index,
+ dentry->d_name.name, dentry->d_name.len, 0);
+ if (IS_ERR(di)) {
+ err = PTR_ERR(di);
+ goto out;
+ }
+ BUG_ON(ret == -ENOENT);
+ if (check_path_shared(root, path))
+ goto out;
+
+ err = 0;
+out:
+ btrfs_free_path(path);
+ if (err) {
+ btrfs_end_transaction(trans, root);
+ root->fs_info->enospc_unlink = 0;
+ return ERR_PTR(err);
+ }
+
+ trans->block_rsv = &root->fs_info->global_block_rsv;
+ return trans;
+}
+
+static void __unlink_end_trans(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ if (trans->block_rsv == &root->fs_info->global_block_rsv) {
+ BUG_ON(!root->fs_info->enospc_unlink);
+ root->fs_info->enospc_unlink = 0;
+ }
+ btrfs_end_transaction_throttle(trans, root);
+}
+
+static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct btrfs_root *root = BTRFS_I(dir)->root;
+ struct btrfs_trans_handle *trans;
+ struct inode *inode = dentry->d_inode;
+ int ret;
+ unsigned long nr = 0;
+
+ trans = __unlink_start_trans(dir, dentry);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
+
btrfs_set_trans_block_group(trans, dir);
btrfs_record_unlink_dir(trans, dir, dentry->d_inode, 0);
ret = btrfs_unlink_inode(trans, root, dir, dentry->d_inode,
dentry->d_name.name, dentry->d_name.len);
+ BUG_ON(ret);
- if (inode->i_nlink == 0)
+ if (inode->i_nlink == 0) {
ret = btrfs_orphan_add(trans, inode);
+ BUG_ON(ret);
+ }
nr = trans->blocks_used;
-
- btrfs_end_transaction_throttle(trans, root);
- btrfs_unreserve_metadata_space(root, 6);
+ __unlink_end_trans(trans, root);
btrfs_btree_balance_dirty(root, nr);
return ret;
}
{
struct inode *inode = dentry->d_inode;
int err = 0;
- int ret;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct btrfs_trans_handle *trans;
unsigned long nr = 0;
inode->i_ino == BTRFS_FIRST_FREE_OBJECTID)
return -ENOTEMPTY;
- ret = btrfs_reserve_metadata_space(root, 5);
- if (ret)
- return ret;
-
- trans = btrfs_start_transaction(root, 1);
- if (IS_ERR(trans)) {
- btrfs_unreserve_metadata_space(root, 5);
+ trans = __unlink_start_trans(dir, dentry);
+ if (IS_ERR(trans))
return PTR_ERR(trans);
- }
btrfs_set_trans_block_group(trans, dir);
btrfs_i_size_write(inode, 0);
out:
nr = trans->blocks_used;
- ret = btrfs_end_transaction_throttle(trans, root);
- btrfs_unreserve_metadata_space(root, 5);
+ __unlink_end_trans(trans, root);
btrfs_btree_balance_dirty(root, nr);
- if (ret && !err)
- err = ret;
return err;
}
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
- struct extent_map *em;
+ struct extent_map *em = NULL;
struct extent_state *cached_state = NULL;
u64 mask = root->sectorsize - 1;
u64 hole_start = (inode->i_size + mask) & ~mask;
u64 hint_byte = 0;
hole_size = last_byte - cur_offset;
- err = btrfs_reserve_metadata_space(root, 2);
- if (err)
+ trans = btrfs_start_transaction(root, 2);
+ if (IS_ERR(trans)) {
+ err = PTR_ERR(trans);
break;
-
- trans = btrfs_start_transaction(root, 1);
+ }
btrfs_set_trans_block_group(trans, inode);
err = btrfs_drop_extents(trans, inode, cur_offset,
last_byte - 1, 0);
btrfs_end_transaction(trans, root);
- btrfs_unreserve_metadata_space(root, 2);
}
free_extent_map(em);
+ em = NULL;
cur_offset = last_byte;
if (cur_offset >= block_end)
break;
}
+ free_extent_map(em);
unlock_extent_cached(io_tree, hole_start, block_end - 1, &cached_state,
GFP_NOFS);
return err;
}
}
- ret = btrfs_reserve_metadata_space(root, 1);
- if (ret)
- return ret;
-
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
- btrfs_unreserve_metadata_space(root, 1);
btrfs_btree_balance_dirty(root, nr);
if (attr->ia_size > inode->i_size) {
return 0;
}
-static noinline void init_btrfs_i(struct inode *inode)
-{
- struct btrfs_inode *bi = BTRFS_I(inode);
-
- bi->generation = 0;
- bi->sequence = 0;
- bi->last_trans = 0;
- bi->last_sub_trans = 0;
- bi->logged_trans = 0;
- bi->delalloc_bytes = 0;
- bi->reserved_bytes = 0;
- bi->disk_i_size = 0;
- bi->flags = 0;
- bi->index_cnt = (u64)-1;
- bi->last_unlink_trans = 0;
- bi->ordered_data_close = 0;
- bi->force_compress = 0;
- extent_map_tree_init(&BTRFS_I(inode)->extent_tree, GFP_NOFS);
- extent_io_tree_init(&BTRFS_I(inode)->io_tree,
- inode->i_mapping, GFP_NOFS);
- extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
- inode->i_mapping, GFP_NOFS);
- INIT_LIST_HEAD(&BTRFS_I(inode)->delalloc_inodes);
- INIT_LIST_HEAD(&BTRFS_I(inode)->ordered_operations);
- RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node);
- btrfs_ordered_inode_tree_init(&BTRFS_I(inode)->ordered_tree);
- mutex_init(&BTRFS_I(inode)->log_mutex);
-}
-
static int btrfs_init_locked_inode(struct inode *inode, void *p)
{
struct btrfs_iget_args *args = p;
inode->i_ino = args->ino;
- init_btrfs_i(inode);
BTRFS_I(inode)->root = args->root;
btrfs_set_inode_space_info(args->root, inode);
return 0;
if (!inode)
return ERR_PTR(-ENOMEM);
- init_btrfs_i(inode);
-
BTRFS_I(inode)->root = root;
memcpy(&BTRFS_I(inode)->location, key, sizeof(*key));
BTRFS_I(inode)->dummy_inode = 1;
* btrfs_get_inode_index_count has an explanation for the magic
* number
*/
- init_btrfs_i(inode);
BTRFS_I(inode)->index_cnt = 2;
BTRFS_I(inode)->root = root;
BTRFS_I(inode)->generation = trans->transid;
if (!new_valid_dev(rdev))
return -EINVAL;
+ err = btrfs_find_free_objectid(NULL, root, dir->i_ino, &objectid);
+ if (err)
+ return err;
+
/*
* 2 for inode item and ref
* 2 for dir items
* 1 for xattr if selinux is on
*/
- err = btrfs_reserve_metadata_space(root, 5);
- if (err)
- return err;
+ trans = btrfs_start_transaction(root, 5);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
- trans = btrfs_start_transaction(root, 1);
- if (!trans)
- goto fail;
btrfs_set_trans_block_group(trans, dir);
- err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
- if (err) {
- err = -ENOSPC;
- goto out_unlock;
- }
-
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len,
dentry->d_parent->d_inode->i_ino, objectid,
out_unlock:
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
-fail:
- btrfs_unreserve_metadata_space(root, 5);
+ btrfs_btree_balance_dirty(root, nr);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
}
- btrfs_btree_balance_dirty(root, nr);
return err;
}
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct inode *inode = NULL;
- int err;
int drop_inode = 0;
+ int err;
unsigned long nr = 0;
u64 objectid;
u64 index = 0;
+ err = btrfs_find_free_objectid(NULL, root, dir->i_ino, &objectid);
+ if (err)
+ return err;
/*
* 2 for inode item and ref
* 2 for dir items
* 1 for xattr if selinux is on
*/
- err = btrfs_reserve_metadata_space(root, 5);
- if (err)
- return err;
+ trans = btrfs_start_transaction(root, 5);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
- trans = btrfs_start_transaction(root, 1);
- if (!trans)
- goto fail;
btrfs_set_trans_block_group(trans, dir);
- err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
- if (err) {
- err = -ENOSPC;
- goto out_unlock;
- }
-
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len,
dentry->d_parent->d_inode->i_ino,
out_unlock:
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
-fail:
- btrfs_unreserve_metadata_space(root, 5);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
if (root->objectid != BTRFS_I(inode)->root->objectid)
return -EPERM;
- /*
- * 1 item for inode ref
- * 2 items for dir items
- */
- err = btrfs_reserve_metadata_space(root, 3);
- if (err)
- return err;
-
btrfs_inc_nlink(inode);
err = btrfs_set_inode_index(dir, &index);
if (err)
goto fail;
- trans = btrfs_start_transaction(root, 1);
+ /*
+ * 1 item for inode ref
+ * 2 items for dir items
+ */
+ trans = btrfs_start_transaction(root, 3);
+ if (IS_ERR(trans)) {
+ err = PTR_ERR(trans);
+ goto fail;
+ }
btrfs_set_trans_block_group(trans, dir);
atomic_inc(&inode->i_count);
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
fail:
- btrfs_unreserve_metadata_space(root, 3);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
u64 index = 0;
unsigned long nr = 1;
+ err = btrfs_find_free_objectid(NULL, root, dir->i_ino, &objectid);
+ if (err)
+ return err;
+
/*
* 2 items for inode and ref
* 2 items for dir items
* 1 for xattr if selinux is on
*/
- err = btrfs_reserve_metadata_space(root, 5);
- if (err)
- return err;
-
- trans = btrfs_start_transaction(root, 1);
- if (!trans) {
- err = -ENOMEM;
- goto out_unlock;
- }
+ trans = btrfs_start_transaction(root, 5);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, dir);
- err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
- if (err) {
- err = -ENOSPC;
- goto out_fail;
- }
-
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len,
dentry->d_parent->d_inode->i_ino, objectid,
out_fail:
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
-
-out_unlock:
- btrfs_unreserve_metadata_space(root, 5);
if (drop_on_err)
iput(inode);
btrfs_btree_balance_dirty(root, nr);
struct inode *btrfs_alloc_inode(struct super_block *sb)
{
struct btrfs_inode *ei;
+ struct inode *inode;
ei = kmem_cache_alloc(btrfs_inode_cachep, GFP_NOFS);
if (!ei)
return NULL;
+
+ ei->root = NULL;
+ ei->space_info = NULL;
+ ei->generation = 0;
+ ei->sequence = 0;
ei->last_trans = 0;
ei->last_sub_trans = 0;
ei->logged_trans = 0;
+ ei->delalloc_bytes = 0;
+ ei->reserved_bytes = 0;
+ ei->disk_i_size = 0;
+ ei->flags = 0;
+ ei->index_cnt = (u64)-1;
+ ei->last_unlink_trans = 0;
+
+ spin_lock_init(&ei->accounting_lock);
ei->outstanding_extents = 0;
ei->reserved_extents = 0;
- ei->root = NULL;
- spin_lock_init(&ei->accounting_lock);
+
+ ei->ordered_data_close = 0;
+ ei->dummy_inode = 0;
+ ei->force_compress = 0;
+
+ inode = &ei->vfs_inode;
+ extent_map_tree_init(&ei->extent_tree, GFP_NOFS);
+ extent_io_tree_init(&ei->io_tree, &inode->i_data, GFP_NOFS);
+ extent_io_tree_init(&ei->io_failure_tree, &inode->i_data, GFP_NOFS);
+ mutex_init(&ei->log_mutex);
btrfs_ordered_inode_tree_init(&ei->ordered_tree);
INIT_LIST_HEAD(&ei->i_orphan);
+ INIT_LIST_HEAD(&ei->delalloc_inodes);
INIT_LIST_HEAD(&ei->ordered_operations);
- return &ei->vfs_inode;
+ RB_CLEAR_NODE(&ei->rb_node);
+
+ return inode;
}
void btrfs_destroy_inode(struct inode *inode)
if (S_ISDIR(old_inode->i_mode) && new_inode &&
new_inode->i_size > BTRFS_EMPTY_DIR_SIZE)
return -ENOTEMPTY;
-
- /*
- * We want to reserve the absolute worst case amount of items. So if
- * both inodes are subvols and we need to unlink them then that would
- * require 4 item modifications, but if they are both normal inodes it
- * would require 5 item modifications, so we'll assume their normal
- * inodes. So 5 * 2 is 10, plus 1 for the new link, so 11 total items
- * should cover the worst case number of items we'll modify.
- */
- ret = btrfs_reserve_metadata_space(root, 11);
- if (ret)
- return ret;
-
/*
* we're using rename to replace one file with another.
* and the replacement file is large. Start IO on it now so
/* close the racy window with snapshot create/destroy ioctl */
if (old_inode->i_ino == BTRFS_FIRST_FREE_OBJECTID)
down_read(&root->fs_info->subvol_sem);
+ /*
+ * We want to reserve the absolute worst case amount of items. So if
+ * both inodes are subvols and we need to unlink them then that would
+ * require 4 item modifications, but if they are both normal inodes it
+ * would require 5 item modifications, so we'll assume their normal
+ * inodes. So 5 * 2 is 10, plus 1 for the new link, so 11 total items
+ * should cover the worst case number of items we'll modify.
+ */
+ trans = btrfs_start_transaction(root, 20);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
- trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, new_dir);
if (dest != root)
if (old_inode->i_ino == BTRFS_FIRST_FREE_OBJECTID)
up_read(&root->fs_info->subvol_sem);
- btrfs_unreserve_metadata_space(root, 11);
return ret;
}
return 0;
}
+int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput)
+{
+ struct btrfs_inode *binode;
+ struct inode *inode = NULL;
+
+ spin_lock(&root->fs_info->delalloc_lock);
+ while (!list_empty(&root->fs_info->delalloc_inodes)) {
+ binode = list_entry(root->fs_info->delalloc_inodes.next,
+ struct btrfs_inode, delalloc_inodes);
+ inode = igrab(&binode->vfs_inode);
+ if (inode) {
+ list_move_tail(&binode->delalloc_inodes,
+ &root->fs_info->delalloc_inodes);
+ break;
+ }
+
+ list_del_init(&binode->delalloc_inodes);
+ cond_resched_lock(&root->fs_info->delalloc_lock);
+ }
+ spin_unlock(&root->fs_info->delalloc_lock);
+
+ if (inode) {
+ write_inode_now(inode, 0);
+ if (delay_iput)
+ btrfs_add_delayed_iput(inode);
+ else
+ iput(inode);
+ return 1;
+ }
+ return 0;
+}
+
static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
const char *symname)
{
if (name_len > BTRFS_MAX_INLINE_DATA_SIZE(root))
return -ENAMETOOLONG;
+ err = btrfs_find_free_objectid(NULL, root, dir->i_ino, &objectid);
+ if (err)
+ return err;
/*
* 2 items for inode item and ref
* 2 items for dir items
* 1 item for xattr if selinux is on
*/
- err = btrfs_reserve_metadata_space(root, 5);
- if (err)
- return err;
+ trans = btrfs_start_transaction(root, 5);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
- trans = btrfs_start_transaction(root, 1);
- if (!trans)
- goto out_fail;
btrfs_set_trans_block_group(trans, dir);
- err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
- if (err) {
- err = -ENOSPC;
- goto out_unlock;
- }
-
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len,
dentry->d_parent->d_inode->i_ino, objectid,
out_unlock:
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
-out_fail:
- btrfs_unreserve_metadata_space(root, 5);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
u64 i_size;
while (num_bytes > 0) {
- trans = btrfs_start_transaction(root, 1);
+ trans = btrfs_start_transaction(root, 3);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ break;
+ }
ret = btrfs_reserve_extent(trans, root, num_bytes,
root->sectorsize, 0, alloc_hint,
(u64)-1, &ins, 1);
if (ret) {
- WARN_ON(1);
- goto stop_trans;
- }
-
- ret = btrfs_reserve_metadata_space(root, 3);
- if (ret) {
- btrfs_free_reserved_extent(root, ins.objectid,
- ins.offset);
- goto stop_trans;
+ btrfs_end_transaction(trans, root);
+ break;
}
ret = insert_reserved_file_extent(trans, inode,
BUG_ON(ret);
btrfs_end_transaction(trans, root);
- btrfs_unreserve_metadata_space(root, 3);
}
return ret;
-
-stop_trans:
- btrfs_end_transaction(trans, root);
- return ret;
-
}
static long btrfs_fallocate(struct inode *inode, int mode,
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff