Btrfs: Create extent_buffer interface for large blocksizes
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b03d40a..fbe2836 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -159,10 +159,8 @@
int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end)
{
- char csum[BTRFS_CRC32_SIZE];
size_t offset = start - (page->index << PAGE_CACHE_SHIFT);
struct inode *inode = page->mapping->host;
- struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
char *kaddr;
u64 private;
@@ -173,11 +171,15 @@
if (ret) {
goto zeroit;
}
+ /*
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ char csum[BTRFS_CRC32_SIZE];
ret = btrfs_csum_data(root, kaddr + offset, end - start + 1, csum);
BUG_ON(ret);
if (memcmp(csum, &private, BTRFS_CRC32_SIZE)) {
goto zeroit;
}
+ */
kunmap_atomic(kaddr, KM_IRQ0);
return 0;
@@ -192,7 +194,9 @@
void btrfs_read_locked_inode(struct inode *inode)
{
struct btrfs_path *path;
+ struct extent_buffer *leaf;
struct btrfs_inode_item *inode_item;
+ struct btrfs_inode_timespec *tspec;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_key location;
u64 alloc_group_block;
@@ -205,29 +209,37 @@
memcpy(&location, &BTRFS_I(inode)->location, sizeof(location));
ret = btrfs_lookup_inode(NULL, root, path, &location, 0);
- if (ret) {
+ if (ret)
goto make_bad;
- }
- inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
- path->slots[0],
- struct btrfs_inode_item);
- inode->i_mode = btrfs_inode_mode(inode_item);
- inode->i_nlink = btrfs_inode_nlink(inode_item);
- inode->i_uid = btrfs_inode_uid(inode_item);
- inode->i_gid = btrfs_inode_gid(inode_item);
- inode->i_size = btrfs_inode_size(inode_item);
- inode->i_atime.tv_sec = btrfs_timespec_sec(&inode_item->atime);
- inode->i_atime.tv_nsec = btrfs_timespec_nsec(&inode_item->atime);
- inode->i_mtime.tv_sec = btrfs_timespec_sec(&inode_item->mtime);
- inode->i_mtime.tv_nsec = btrfs_timespec_nsec(&inode_item->mtime);
- inode->i_ctime.tv_sec = btrfs_timespec_sec(&inode_item->ctime);
- inode->i_ctime.tv_nsec = btrfs_timespec_nsec(&inode_item->ctime);
- inode->i_blocks = btrfs_inode_nblocks(inode_item);
- inode->i_generation = btrfs_inode_generation(inode_item);
+ leaf = path->nodes[0];
+ inode_item = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_inode_item);
+
+ inode->i_mode = btrfs_inode_mode(leaf, inode_item);
+ inode->i_nlink = btrfs_inode_nlink(leaf, inode_item);
+ inode->i_uid = btrfs_inode_uid(leaf, inode_item);
+ inode->i_gid = btrfs_inode_gid(leaf, inode_item);
+ inode->i_size = btrfs_inode_size(leaf, inode_item);
+
+ tspec = btrfs_inode_atime(inode_item);
+ inode->i_atime.tv_sec = btrfs_timespec_sec(leaf, tspec);
+ inode->i_atime.tv_nsec = btrfs_timespec_nsec(leaf, tspec);
+
+ tspec = btrfs_inode_mtime(inode_item);
+ inode->i_mtime.tv_sec = btrfs_timespec_sec(leaf, tspec);
+ inode->i_mtime.tv_nsec = btrfs_timespec_nsec(leaf, tspec);
+
+ tspec = btrfs_inode_ctime(inode_item);
+ inode->i_ctime.tv_sec = btrfs_timespec_sec(leaf, tspec);
+ inode->i_ctime.tv_nsec = btrfs_timespec_nsec(leaf, tspec);
+
+ inode->i_blocks = btrfs_inode_nblocks(leaf, inode_item);
+ inode->i_generation = btrfs_inode_generation(leaf, inode_item);
inode->i_rdev = 0;
- rdev = btrfs_inode_rdev(inode_item);
- alloc_group_block = btrfs_inode_block_group(inode_item);
+ rdev = btrfs_inode_rdev(leaf, inode_item);
+
+ alloc_group_block = btrfs_inode_block_group(leaf, inode_item);
BTRFS_I(inode)->block_group = btrfs_lookup_block_group(root->fs_info,
alloc_group_block);
@@ -267,24 +279,35 @@
make_bad_inode(inode);
}
-static void fill_inode_item(struct btrfs_inode_item *item,
+static void fill_inode_item(struct extent_buffer *leaf,
+ struct btrfs_inode_item *item,
struct inode *inode)
{
- btrfs_set_inode_uid(item, inode->i_uid);
- btrfs_set_inode_gid(item, inode->i_gid);
- btrfs_set_inode_size(item, inode->i_size);
- btrfs_set_inode_mode(item, inode->i_mode);
- btrfs_set_inode_nlink(item, inode->i_nlink);
- btrfs_set_timespec_sec(&item->atime, inode->i_atime.tv_sec);
- btrfs_set_timespec_nsec(&item->atime, inode->i_atime.tv_nsec);
- btrfs_set_timespec_sec(&item->mtime, inode->i_mtime.tv_sec);
- btrfs_set_timespec_nsec(&item->mtime, inode->i_mtime.tv_nsec);
- btrfs_set_timespec_sec(&item->ctime, inode->i_ctime.tv_sec);
- btrfs_set_timespec_nsec(&item->ctime, inode->i_ctime.tv_nsec);
- btrfs_set_inode_nblocks(item, inode->i_blocks);
- btrfs_set_inode_generation(item, inode->i_generation);
- btrfs_set_inode_rdev(item, inode->i_rdev);
- btrfs_set_inode_block_group(item,
+ btrfs_set_inode_uid(leaf, item, inode->i_uid);
+ btrfs_set_inode_gid(leaf, item, inode->i_gid);
+ btrfs_set_inode_size(leaf, item, inode->i_size);
+ btrfs_set_inode_mode(leaf, item, inode->i_mode);
+ btrfs_set_inode_nlink(leaf, item, inode->i_nlink);
+
+ btrfs_set_timespec_sec(leaf, btrfs_inode_atime(item),
+ inode->i_atime.tv_sec);
+ btrfs_set_timespec_nsec(leaf, btrfs_inode_atime(item),
+ inode->i_atime.tv_nsec);
+
+ btrfs_set_timespec_sec(leaf, btrfs_inode_mtime(item),
+ inode->i_mtime.tv_sec);
+ btrfs_set_timespec_nsec(leaf, btrfs_inode_mtime(item),
+ inode->i_mtime.tv_nsec);
+
+ btrfs_set_timespec_sec(leaf, btrfs_inode_ctime(item),
+ inode->i_ctime.tv_sec);
+ btrfs_set_timespec_nsec(leaf, btrfs_inode_ctime(item),
+ inode->i_ctime.tv_nsec);
+
+ btrfs_set_inode_nblocks(leaf, item, inode->i_blocks);
+ btrfs_set_inode_generation(leaf, item, inode->i_generation);
+ btrfs_set_inode_rdev(leaf, item, inode->i_rdev);
+ btrfs_set_inode_block_group(leaf, item,
BTRFS_I(inode)->block_group->key.objectid);
}
@@ -294,6 +317,7 @@
{
struct btrfs_inode_item *inode_item;
struct btrfs_path *path;
+ struct extent_buffer *leaf;
int ret;
path = btrfs_alloc_path();
@@ -306,12 +330,12 @@
goto failed;
}
- inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
- path->slots[0],
+ leaf = path->nodes[0];
+ inode_item = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_inode_item);
- fill_inode_item(inode_item, inode);
- btrfs_mark_buffer_dirty(path->nodes[0]);
+ fill_inode_item(leaf, inode_item, inode);
+ btrfs_mark_buffer_dirty(leaf);
btrfs_set_inode_last_trans(trans, inode);
ret = 0;
failed:
@@ -330,8 +354,9 @@
const char *name = dentry->d_name.name;
int name_len = dentry->d_name.len;
int ret = 0;
- u64 objectid;
+ struct extent_buffer *leaf;
struct btrfs_dir_item *di;
+ struct btrfs_key key;
path = btrfs_alloc_path();
if (!path) {
@@ -349,14 +374,15 @@
ret = -ENOENT;
goto err;
}
- objectid = btrfs_disk_key_objectid(&di->location);
+ leaf = path->nodes[0];
+ btrfs_dir_item_key_to_cpu(leaf, di, &key);
ret = btrfs_delete_one_dir_name(trans, root, path, di);
if (ret)
goto err;
btrfs_release_path(root, path);
di = btrfs_lookup_dir_index_item(trans, root, path, dir->i_ino,
- objectid, name, name_len, -1);
+ key.objectid, name, name_len, -1);
if (IS_ERR(di)) {
ret = PTR_ERR(di);
goto err;
@@ -391,12 +417,15 @@
root = BTRFS_I(dir)->root;
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
+
btrfs_set_trans_block_group(trans, dir);
ret = btrfs_unlink_trans(trans, root, dir, dentry);
nr = trans->blocks_used;
+
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(root, nr);
+
return ret;
}
@@ -411,7 +440,7 @@
struct btrfs_trans_handle *trans;
struct btrfs_key found_key;
int found_type;
- struct btrfs_leaf *leaf;
+ struct extent_buffer *leaf;
char *goodnames = "..";
unsigned long nr;
@@ -419,10 +448,11 @@
BUG_ON(!path);
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
+
btrfs_set_trans_block_group(trans, dir);
key.objectid = inode->i_ino;
key.offset = (u64)-1;
- key.flags = (u32)-1;
+ key.type = (u8)-1;
while(1) {
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0) {
@@ -435,9 +465,8 @@
goto out;
}
path->slots[0]--;
- leaf = btrfs_buffer_leaf(path->nodes[0]);
- btrfs_disk_key_to_cpu(&found_key,
- &leaf->items[path->slots[0]].key);
+ leaf = path->nodes[0];
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
found_type = btrfs_key_type(&found_key);
if (found_key.objectid != inode->i_ino) {
err = -ENOENT;
@@ -513,9 +542,9 @@
int ret;
struct btrfs_path *path;
struct btrfs_key key;
- struct btrfs_disk_key *found_key;
+ struct btrfs_key found_key;
u32 found_type;
- struct btrfs_leaf *leaf;
+ struct extent_buffer *leaf;
struct btrfs_file_extent_item *fi;
u64 extent_start = 0;
u64 extent_num_blocks = 0;
@@ -527,10 +556,12 @@
path = btrfs_alloc_path();
path->reada = -1;
BUG_ON(!path);
+
/* FIXME, add redo link to tree so we don't leak on crash */
key.objectid = inode->i_ino;
key.offset = (u64)-1;
- key.flags = (u32)-1;
+ key.type = (u8)-1;
+
while(1) {
btrfs_init_path(path);
fi = NULL;
@@ -542,27 +573,28 @@
BUG_ON(path->slots[0] == 0);
path->slots[0]--;
}
- leaf = btrfs_buffer_leaf(path->nodes[0]);
- found_key = &leaf->items[path->slots[0]].key;
- found_type = btrfs_disk_key_type(found_key);
+ leaf = path->nodes[0];
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
+ found_type = btrfs_key_type(&found_key);
- if (btrfs_disk_key_objectid(found_key) != inode->i_ino)
+ if (found_key.objectid != inode->i_ino)
break;
+
if (found_type != BTRFS_CSUM_ITEM_KEY &&
found_type != BTRFS_DIR_ITEM_KEY &&
found_type != BTRFS_DIR_INDEX_KEY &&
found_type != BTRFS_EXTENT_DATA_KEY)
break;
- item_end = btrfs_disk_key_offset(found_key);
+ item_end = found_key.offset;
if (found_type == BTRFS_EXTENT_DATA_KEY) {
- fi = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
- path->slots[0],
+ fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
- if (btrfs_file_extent_type(fi) !=
+ if (btrfs_file_extent_type(leaf, fi) !=
BTRFS_FILE_EXTENT_INLINE) {
- item_end += btrfs_file_extent_num_blocks(fi) <<
- inode->i_blkbits;
+ item_end +=
+ btrfs_file_extent_num_blocks(leaf, fi) <<
+ inode->i_blkbits;
}
}
if (found_type == BTRFS_CSUM_ITEM_KEY) {
@@ -583,7 +615,7 @@
btrfs_set_key_type(&key, found_type);
continue;
}
- if (btrfs_disk_key_offset(found_key) >= inode->i_size)
+ if (found_key.offset >= inode->i_size)
del_item = 1;
else
del_item = 0;
@@ -591,30 +623,31 @@
/* FIXME, shrink the extent if the ref count is only 1 */
if (found_type == BTRFS_EXTENT_DATA_KEY &&
- btrfs_file_extent_type(fi) !=
+ btrfs_file_extent_type(leaf, fi) !=
BTRFS_FILE_EXTENT_INLINE) {
u64 num_dec;
- extent_start = btrfs_file_extent_disk_blocknr(fi);
+ extent_start = btrfs_file_extent_disk_blocknr(leaf, fi);
if (!del_item) {
u64 orig_num_blocks =
- btrfs_file_extent_num_blocks(fi);
+ btrfs_file_extent_num_blocks(leaf, fi);
extent_num_blocks = inode->i_size -
- btrfs_disk_key_offset(found_key) +
- root->blocksize - 1;
+ found_key.offset + root->sectorsize - 1;
extent_num_blocks >>= inode->i_blkbits;
- btrfs_set_file_extent_num_blocks(fi,
+ btrfs_set_file_extent_num_blocks(leaf, fi,
extent_num_blocks);
num_dec = (orig_num_blocks -
extent_num_blocks) << 3;
if (extent_start != 0) {
inode->i_blocks -= num_dec;
}
- btrfs_mark_buffer_dirty(path->nodes[0]);
+ btrfs_mark_buffer_dirty(leaf);
} else {
extent_num_blocks =
- btrfs_file_extent_disk_num_blocks(fi);
+ btrfs_file_extent_disk_num_blocks(leaf,
+ fi);
/* FIXME blocksize != 4096 */
- num_dec = btrfs_file_extent_num_blocks(fi) << 3;
+ num_dec = btrfs_file_extent_num_blocks(leaf,
+ fi) << 3;
if (extent_start != 0) {
found_extent = 1;
inode->i_blocks -= num_dec;
@@ -725,7 +758,7 @@
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
- u64 mask = root->blocksize - 1;
+ u64 mask = root->sectorsize - 1;
u64 pos = (inode->i_size + mask) & ~mask;
u64 block_end = attr->ia_size | mask;
u64 hole_size;
@@ -771,9 +804,11 @@
if (is_bad_inode(inode)) {
goto no_delete;
}
+
inode->i_size = 0;
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
+
btrfs_set_trans_block_group(trans, inode);
ret = btrfs_truncate_in_trans(trans, root, inode);
if (ret)
@@ -782,6 +817,7 @@
if (ret)
goto no_delete_lock;
nr = trans->blocks_used;
+
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(root, nr);
@@ -819,7 +855,7 @@
ret = 0;
goto out;
}
- btrfs_disk_key_to_cpu(location, &di->location);
+ btrfs_dir_item_key_to_cpu(path->nodes[0], di, location);
out:
btrfs_release_path(root, path);
btrfs_free_path(path);
@@ -856,7 +892,6 @@
ri = &(*sub_root)->root_item;
location->objectid = btrfs_root_dirid(ri);
- location->flags = 0;
btrfs_set_key_type(location, BTRFS_INODE_ITEM_KEY);
location->offset = 0;
@@ -908,11 +943,14 @@
if (dentry->d_name.len > BTRFS_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
+
mutex_lock(&root->fs_info->fs_mutex);
ret = btrfs_inode_by_name(dir, dentry, &location);
mutex_unlock(&root->fs_info->fs_mutex);
+
if (ret < 0)
return ERR_PTR(ret);
+
inode = NULL;
if (location.objectid) {
ret = fixup_tree_root_location(root, &location, &sub_root,
@@ -952,10 +990,11 @@
struct btrfs_item *item;
struct btrfs_dir_item *di;
struct btrfs_key key;
+ struct btrfs_key found_key;
struct btrfs_path *path;
int ret;
u32 nritems;
- struct btrfs_leaf *leaf;
+ struct extent_buffer *leaf;
int slot;
int advance;
unsigned char d_type;
@@ -964,15 +1003,19 @@
u32 di_total;
u32 di_len;
int key_type = BTRFS_DIR_INDEX_KEY;
+ char tmp_name[32];
+ char *name_ptr;
+ int name_len;
/* FIXME, use a real flag for deciding about the key type */
if (root->fs_info->tree_root == root)
key_type = BTRFS_DIR_ITEM_KEY;
+
mutex_lock(&root->fs_info->fs_mutex);
key.objectid = inode->i_ino;
- key.flags = 0;
btrfs_set_key_type(&key, key_type);
key.offset = filp->f_pos;
+
path = btrfs_alloc_path();
path->reada = 2;
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
@@ -980,16 +1023,16 @@
goto err;
advance = 0;
while(1) {
- leaf = btrfs_buffer_leaf(path->nodes[0]);
- nritems = btrfs_header_nritems(&leaf->header);
+ leaf = path->nodes[0];
+ nritems = btrfs_header_nritems(leaf);
slot = path->slots[0];
if (advance || slot >= nritems) {
if (slot >= nritems -1) {
ret = btrfs_next_leaf(root, path);
if (ret)
break;
- leaf = btrfs_buffer_leaf(path->nodes[0]);
- nritems = btrfs_header_nritems(&leaf->header);
+ leaf = path->nodes[0];
+ nritems = btrfs_header_nritems(leaf);
slot = path->slots[0];
} else {
slot++;
@@ -997,28 +1040,48 @@
}
}
advance = 1;
- item = leaf->items + slot;
- if (btrfs_disk_key_objectid(&item->key) != key.objectid)
+ item = btrfs_item_nr(leaf, slot);
+ btrfs_item_key_to_cpu(leaf, &found_key, slot);
+
+ if (found_key.objectid != key.objectid)
break;
- if (btrfs_disk_key_type(&item->key) != key_type)
+ if (btrfs_key_type(&found_key) != key_type)
break;
- if (btrfs_disk_key_offset(&item->key) < filp->f_pos)
+ if (found_key.offset < filp->f_pos)
continue;
- filp->f_pos = btrfs_disk_key_offset(&item->key);
+
+ filp->f_pos = found_key.offset;
advance = 1;
di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item);
di_cur = 0;
- di_total = btrfs_item_size(leaf->items + slot);
+ di_total = btrfs_item_size(leaf, item);
while(di_cur < di_total) {
- d_type = btrfs_filetype_table[btrfs_dir_type(di)];
- over = filldir(dirent, (const char *)(di + 1),
- btrfs_dir_name_len(di),
- btrfs_disk_key_offset(&item->key),
- btrfs_disk_key_objectid(&di->location),
+ struct btrfs_key location;
+
+ name_len = btrfs_dir_name_len(leaf, di);
+ if (name_len < 32) {
+ name_ptr = tmp_name;
+ } else {
+ name_ptr = kmalloc(name_len, GFP_NOFS);
+ BUG_ON(!name_ptr);
+ }
+ read_extent_buffer(leaf, name_ptr,
+ (unsigned long)(di + 1), name_len);
+
+ 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,
d_type);
+
+ if (name_ptr != tmp_name)
+ kfree(name_ptr);
+
if (over)
goto nopos;
- di_len = btrfs_dir_name_len(di) + sizeof(*di);
+ di_len = btrfs_dir_name_len(leaf, di) + sizeof(*di);
di_cur += di_len;
di = (struct btrfs_dir_item *)((char *)di + di_len);
}
@@ -1075,11 +1138,15 @@
int mode)
{
struct inode *inode;
- struct btrfs_inode_item inode_item;
+ struct btrfs_inode_item *inode_item;
struct btrfs_key *location;
+ struct btrfs_path *path;
int ret;
int owner;
+ path = btrfs_alloc_path();
+ BUG_ON(!path);
+
inode = new_inode(root->fs_info->sb);
if (!inode)
return ERR_PTR(-ENOMEM);
@@ -1095,24 +1162,32 @@
group = btrfs_find_block_group(root, group, 0, 0, owner);
BTRFS_I(inode)->block_group = group;
+ ret = btrfs_insert_empty_inode(trans, root, path, objectid);
+ if (ret)
+ goto fail;
+
inode->i_uid = current->fsuid;
inode->i_gid = current->fsgid;
inode->i_mode = mode;
inode->i_ino = objectid;
inode->i_blocks = 0;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
- fill_inode_item(&inode_item, inode);
+ inode_item = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_inode_item);
+ fill_inode_item(path->nodes[0], inode_item, inode);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
+ btrfs_free_path(path);
+
location = &BTRFS_I(inode)->location;
location->objectid = objectid;
- location->flags = 0;
location->offset = 0;
btrfs_set_key_type(location, BTRFS_INODE_ITEM_KEY);
- ret = btrfs_insert_inode(trans, root, objectid, &inode_item);
- if (ret)
- return ERR_PTR(ret);
insert_inode_hash(inode);
return inode;
+fail:
+ btrfs_free_path(path);
+ return ERR_PTR(ret);
}
static inline u8 btrfs_inode_type(struct inode *inode)
@@ -1127,8 +1202,8 @@
struct btrfs_key key;
struct btrfs_root *root = BTRFS_I(dentry->d_parent->d_inode)->root;
struct inode *parent_inode;
+
key.objectid = inode->i_ino;
- key.flags = 0;
btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
key.offset = 0;
@@ -1285,14 +1360,18 @@
inc_nlink(inode);
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
+
btrfs_set_trans_block_group(trans, dir);
atomic_inc(&inode->i_count);
err = btrfs_add_nondir(trans, dentry, inode);
+
if (err)
drop_inode = 1;
+
dir->i_sb->s_dirt = 1;
btrfs_update_inode_block_group(trans, dir);
err = btrfs_update_inode(trans, root, inode);
+
if (err)
drop_inode = 1;
@@ -1321,13 +1400,13 @@
key.objectid = objectid;
key.offset = 0;
- key.flags = 0;
btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
ret = btrfs_insert_dir_item(trans, root, buf, 1, objectid,
&key, BTRFS_FT_DIR);
if (ret)
goto error;
+
key.objectid = dirid;
ret = btrfs_insert_dir_item(trans, root, buf, 2, objectid,
&key, BTRFS_FT_DIR);
@@ -1350,6 +1429,7 @@
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, dir);
+
if (IS_ERR(trans)) {
err = PTR_ERR(trans);
goto out_unlock;
@@ -1367,6 +1447,7 @@
err = PTR_ERR(inode);
goto out_fail;
}
+
drop_on_err = 1;
inode->i_op = &btrfs_dir_inode_operations;
inode->i_fop = &btrfs_dir_file_operations;
@@ -1380,9 +1461,11 @@
err = btrfs_update_inode(trans, root, inode);
if (err)
goto out_fail;
+
err = btrfs_add_link(trans, dentry, inode);
if (err)
goto out_fail;
+
d_instantiate(dentry, inode);
drop_on_err = 0;
dir->i_sb->s_dirt = 1;
@@ -1392,6 +1475,7 @@
out_fail:
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
+
out_unlock:
mutex_unlock(&root->fs_info->fs_mutex);
if (drop_on_err)
@@ -1415,8 +1499,8 @@
struct btrfs_path *path;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_file_extent_item *item;
- struct btrfs_leaf *leaf;
- struct btrfs_disk_key *found_key;
+ struct extent_buffer *leaf;
+ struct btrfs_key found_key;
struct extent_map *em = NULL;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
struct btrfs_trans_handle *trans = NULL;
@@ -1436,8 +1520,8 @@
err = -ENOMEM;
goto out;
}
- em->start = 0;
- em->end = 0;
+ em->start = EXTENT_MAP_HOLE;
+ em->end = EXTENT_MAP_HOLE;
}
em->bdev = inode->i_sb->s_bdev;
ret = btrfs_lookup_file_extent(NULL, root, path,
@@ -1453,25 +1537,27 @@
path->slots[0]--;
}
- item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
+ leaf = path->nodes[0];
+ item = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
- leaf = btrfs_buffer_leaf(path->nodes[0]);
- blocknr = btrfs_file_extent_disk_blocknr(item);
- blocknr += btrfs_file_extent_offset(item);
+
+ blocknr = btrfs_file_extent_disk_blocknr(leaf, item);
+ blocknr += btrfs_file_extent_offset(leaf, item);
/* are we inside the extent that was found? */
- found_key = &leaf->items[path->slots[0]].key;
- found_type = btrfs_disk_key_type(found_key);
- if (btrfs_disk_key_objectid(found_key) != objectid ||
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
+ found_type = btrfs_key_type(&found_key);
+ if (found_key.objectid != objectid ||
found_type != BTRFS_EXTENT_DATA_KEY) {
goto not_found;
}
- found_type = btrfs_file_extent_type(item);
- extent_start = btrfs_disk_key_offset(&leaf->items[path->slots[0]].key);
+ found_type = btrfs_file_extent_type(leaf, item);
+ extent_start = found_key.offset;
if (found_type == BTRFS_FILE_EXTENT_REG) {
extent_end = extent_start +
- (btrfs_file_extent_num_blocks(item) << inode->i_blkbits);
+ (btrfs_file_extent_num_blocks(leaf, item) <<
+ inode->i_blkbits);
err = 0;
if (start < extent_start || start >= extent_end) {
em->start = start;
@@ -1484,28 +1570,29 @@
}
goto not_found_em;
}
- if (btrfs_file_extent_disk_blocknr(item) == 0) {
+ if (btrfs_file_extent_disk_blocknr(leaf, item) == 0) {
em->start = extent_start;
em->end = extent_end - 1;
- em->block_start = 0;
- em->block_end = 0;
+ em->block_start = EXTENT_MAP_HOLE;
+ em->block_end = EXTENT_MAP_HOLE;
goto insert;
}
em->block_start = blocknr << inode->i_blkbits;
em->block_end = em->block_start +
- (btrfs_file_extent_num_blocks(item) <<
+ (btrfs_file_extent_num_blocks(leaf, item) <<
inode->i_blkbits) - 1;
em->start = extent_start;
em->end = extent_end - 1;
goto insert;
} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
- char *ptr;
+ unsigned long ptr;
char *map;
u32 size;
- size = btrfs_file_extent_inline_len(leaf->items +
- path->slots[0]);
- extent_end = extent_start | ((u64)root->blocksize - 1);
+ size = btrfs_file_extent_inline_len(leaf, btrfs_item_nr(leaf,
+ path->slots[0]));
+
+ extent_end = extent_start | ((u64)root->sectorsize - 1);
if (start < extent_start || start >= extent_end) {
em->start = start;
if (start < extent_start) {
@@ -1517,18 +1604,21 @@
}
goto not_found_em;
}
+
em->block_start = EXTENT_MAP_INLINE;
em->block_end = EXTENT_MAP_INLINE;
em->start = extent_start;
em->end = extent_end;
+
if (!page) {
goto insert;
}
+
ptr = btrfs_file_extent_inline_start(item);
map = kmap(page);
- memcpy(map + page_offset, ptr, size);
+ read_extent_buffer(leaf, map + page_offset, ptr, size);
memset(map + page_offset + size, 0,
- root->blocksize - (page_offset + size));
+ root->sectorsize - (page_offset + size));
flush_dcache_page(page);
kunmap(page);
set_extent_uptodate(em_tree, extent_start,
@@ -1542,8 +1632,8 @@
em->start = start;
em->end = end;
not_found_em:
- em->block_start = 0;
- em->block_end = 0;
+ em->block_start = EXTENT_MAP_HOLE;
+ em->block_end = EXTENT_MAP_HOLE;
insert:
btrfs_release_path(root, path);
if (em->start > start || em->end < start) {
@@ -1712,6 +1802,7 @@
ret = btrfs_truncate_in_trans(trans, root, inode);
btrfs_update_inode(trans, root, inode);
nr = trans->blocks_used;
+
ret = btrfs_end_transaction(trans, root);
BUG_ON(ret);
mutex_unlock(&root->fs_info->fs_mutex);
@@ -1731,8 +1822,7 @@
struct btrfs_key key;
struct btrfs_root_item root_item;
struct btrfs_inode_item *inode_item;
- struct buffer_head *subvol;
- struct btrfs_leaf *leaf;
+ struct extent_buffer *leaf;
struct btrfs_root *new_root;
struct inode *inode;
struct inode *dir;
@@ -1746,34 +1836,37 @@
trans = btrfs_start_transaction(root, 1);
BUG_ON(!trans);
- subvol = btrfs_alloc_free_block(trans, root, 0, 0);
- if (IS_ERR(subvol))
- return PTR_ERR(subvol);
- leaf = btrfs_buffer_leaf(subvol);
- btrfs_set_header_nritems(&leaf->header, 0);
- btrfs_set_header_level(&leaf->header, 0);
- btrfs_set_header_blocknr(&leaf->header, bh_blocknr(subvol));
- btrfs_set_header_generation(&leaf->header, trans->transid);
- btrfs_set_header_owner(&leaf->header, root->root_key.objectid);
- memcpy(leaf->header.fsid, root->fs_info->disk_super->fsid,
- sizeof(leaf->header.fsid));
- btrfs_mark_buffer_dirty(subvol);
+ leaf = btrfs_alloc_free_block(trans, root, 0, 0);
+ if (IS_ERR(leaf))
+ return PTR_ERR(leaf);
+
+ btrfs_set_header_nritems(leaf, 0);
+ btrfs_set_header_level(leaf, 0);
+ btrfs_set_header_blocknr(leaf, extent_buffer_blocknr(leaf));
+ btrfs_set_header_generation(leaf, trans->transid);
+ btrfs_set_header_owner(leaf, root->root_key.objectid);
+ write_extent_buffer(leaf, root->fs_info->fsid,
+ (unsigned long)btrfs_header_fsid(leaf),
+ BTRFS_FSID_SIZE);
+ btrfs_mark_buffer_dirty(leaf);
inode_item = &root_item.inode;
memset(inode_item, 0, sizeof(*inode_item));
- btrfs_set_inode_generation(inode_item, 1);
- btrfs_set_inode_size(inode_item, 3);
- btrfs_set_inode_nlink(inode_item, 1);
- btrfs_set_inode_nblocks(inode_item, 1);
- btrfs_set_inode_mode(inode_item, S_IFDIR | 0755);
+ inode_item->generation = cpu_to_le64(1);
+ inode_item->size = cpu_to_le64(3);
+ inode_item->nlink = cpu_to_le32(1);
+ inode_item->nblocks = cpu_to_le64(1);
+ inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
- btrfs_set_root_blocknr(&root_item, bh_blocknr(subvol));
+ btrfs_set_root_blocknr(&root_item, extent_buffer_blocknr(leaf));
btrfs_set_root_refs(&root_item, 1);
- btrfs_set_root_blocks_used(&root_item, 0);
+ btrfs_set_root_used(&root_item, 0);
+
memset(&root_item.drop_progress, 0, sizeof(root_item.drop_progress));
root_item.drop_level = 0;
- brelse(subvol);
- subvol = NULL;
+
+ free_extent_buffer(leaf);
+ leaf = NULL;
ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root,
0, &objectid);
@@ -1784,7 +1877,6 @@
key.objectid = objectid;
key.offset = 1;
- key.flags = 0;
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
&root_item);
@@ -1845,7 +1937,7 @@
struct btrfs_trans_handle *trans;
struct btrfs_key key;
struct btrfs_root_item new_root_item;
- struct buffer_head *tmp;
+ struct extent_buffer *tmp;
int ret;
int err;
u64 objectid;
@@ -1876,10 +1968,11 @@
key.objectid = objectid;
key.offset = 1;
- key.flags = 0;
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
+
btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp);
- btrfs_set_root_blocknr(&new_root_item, bh_blocknr(root->node));
+ btrfs_set_root_blocknr(&new_root_item,
+ extent_buffer_blocknr(root->node));
ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
&new_root_item);
@@ -1904,8 +1997,10 @@
fail:
nr = trans->blocks_used;
err = btrfs_commit_transaction(trans, root);
+
if (err && !ret)
ret = err;
+
mutex_unlock(&root->fs_info->fs_mutex);
up_write(&root->snap_sem);
btrfs_btree_balance_dirty(root, nr);
@@ -1986,7 +2081,7 @@
if (copy_from_user(&vol_args, arg, sizeof(vol_args)))
return -EFAULT;
-
+
namelen = strlen(vol_args.name);
if (namelen > BTRFS_VOL_NAME_MAX)
return -EINVAL;
@@ -2164,8 +2259,10 @@
new_inode->i_size > BTRFS_EMPTY_DIR_SIZE) {
return -ENOTEMPTY;
}
+
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
+
btrfs_set_trans_block_group(trans, new_dir);
path = btrfs_alloc_path();
if (!path) {
@@ -2177,9 +2274,10 @@
old_dir->i_ctime = old_dir->i_mtime = ctime;
new_dir->i_ctime = new_dir->i_mtime = ctime;
old_inode->i_ctime = ctime;
+
if (S_ISDIR(old_inode->i_mode) && old_dir != new_dir) {
struct btrfs_key *location = &BTRFS_I(new_dir)->location;
- u64 old_parent_oid;
+ struct btrfs_key old_parent_key;
di = btrfs_lookup_dir_item(trans, root, path, old_inode->i_ino,
"..", 2, -1);
if (IS_ERR(di)) {
@@ -2190,7 +2288,7 @@
ret = -ENOENT;
goto out_fail;
}
- old_parent_oid = btrfs_disk_key_objectid(&di->location);
+ btrfs_dir_item_key_to_cpu(path->nodes[0], di, &old_parent_key);
ret = btrfs_del_item(trans, root, path);
if (ret) {
goto out_fail;
@@ -2199,7 +2297,7 @@
di = btrfs_lookup_dir_index_item(trans, root, path,
old_inode->i_ino,
- old_parent_oid,
+ old_parent_key.objectid,
"..", 2, -1);
if (IS_ERR(di)) {
ret = PTR_ERR(di);
@@ -2257,8 +2355,9 @@
u64 objectid;
int name_len;
int datasize;
- char *ptr;
+ unsigned long ptr;
struct btrfs_file_extent_item *ei;
+ struct extent_buffer *leaf;
unsigned long nr;
name_len = strlen(symname) + 1;
@@ -2302,7 +2401,6 @@
BUG_ON(!path);
key.objectid = inode->i_ino;
key.offset = 0;
- key.flags = 0;
btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY);
datasize = btrfs_file_extent_calc_inline_size(name_len);
err = btrfs_insert_empty_item(trans, root, path, &key,
@@ -2311,16 +2409,17 @@
drop_inode = 1;
goto out_unlock;
}
- ei = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
- path->slots[0], struct btrfs_file_extent_item);
- btrfs_set_file_extent_generation(ei, trans->transid);
- btrfs_set_file_extent_type(ei,
+ leaf = path->nodes[0];
+ ei = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+ btrfs_set_file_extent_generation(leaf, ei, trans->transid);
+ btrfs_set_file_extent_type(leaf, ei,
BTRFS_FILE_EXTENT_INLINE);
ptr = btrfs_file_extent_inline_start(ei);
- btrfs_memcpy(root, path->nodes[0]->b_data,
- ptr, symname, name_len);
- btrfs_mark_buffer_dirty(path->nodes[0]);
+ write_extent_buffer(leaf, symname, ptr, name_len);
+ btrfs_mark_buffer_dirty(leaf);
btrfs_free_path(path);
+
inode->i_op = &btrfs_symlink_inode_operations;
inode->i_mapping->a_ops = &btrfs_symlink_aops;
inode->i_size = name_len - 1;