Commit 4fd786e6 authored by Misono Tomohiro's avatar Misono Tomohiro Committed by David Sterba
Browse files

btrfs: Remove 'objectid' member from struct btrfs_root



There are two members in struct btrfs_root which indicate root's
objectid: objectid and root_key.objectid.

They are both set to the same value in __setup_root():

  static void __setup_root(struct btrfs_root *root,
                           struct btrfs_fs_info *fs_info,
                           u64 objectid)
  {
    ...
    root->objectid = objectid;
    ...
    root->root_key.objectid = objecitd;
    ...
  }

and not changed to other value after initialization.

grep in btrfs directory shows both are used in many places:
  $ grep -rI "root->root_key.objectid" | wc -l
  133
  $ grep -rI "root->objectid" | wc -l
  55
 (4.17, inc. some noise)

It is confusing to have two similar variable names and it seems
that there is no rule about which should be used in a certain case.

Since ->root_key itself is needed for tree reloc tree, let's remove
'objecitd' member and unify code to use ->root_key.objectid in all places.

Signed-off-by: default avatarMisono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Reviewed-by: default avatarQu Wenruo <wqu@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 5a2cb25a
......@@ -1468,7 +1468,7 @@ int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr)
struct seq_list elem = SEQ_LIST_INIT(elem);
int ret = 0;
struct share_check shared = {
.root_objectid = root->objectid,
.root_objectid = root->root_key.objectid,
.inum = inum,
.share_count = 0,
};
......@@ -2031,7 +2031,8 @@ static int iterate_inode_refs(u64 inum, struct btrfs_root *fs_root,
/* path must be released before calling iterate()! */
btrfs_debug(fs_root->fs_info,
"following ref at offset %u for inode %llu in tree %llu",
cur, found_key.objectid, fs_root->objectid);
cur, found_key.objectid,
fs_root->root_key.objectid);
ret = iterate(parent, name_len,
(unsigned long)(iref + 1), eb, ctx);
if (ret)
......
......@@ -206,7 +206,7 @@ static inline struct btrfs_inode *BTRFS_I(const struct inode *inode)
static inline unsigned long btrfs_inode_hash(u64 objectid,
const struct btrfs_root *root)
{
u64 h = objectid ^ (root->objectid * GOLDEN_RATIO_PRIME);
u64 h = objectid ^ (root->root_key.objectid * GOLDEN_RATIO_PRIME);
#if BITS_PER_LONG == 32
h = (h >> 32) ^ (h & 0xffffffff);
......@@ -339,15 +339,15 @@ static inline void btrfs_print_data_csum_error(struct btrfs_inode *inode,
struct btrfs_root *root = inode->root;
/* Output minus objectid, which is more meaningful */
if (root->objectid >= BTRFS_LAST_FREE_OBJECTID)
if (root->root_key.objectid >= BTRFS_LAST_FREE_OBJECTID)
btrfs_warn_rl(root->fs_info,
"csum failed root %lld ino %lld off %llu csum 0x%08x expected csum 0x%08x mirror %d",
root->objectid, btrfs_ino(inode),
root->root_key.objectid, btrfs_ino(inode),
logical_start, csum, csum_expected, mirror_num);
else
btrfs_warn_rl(root->fs_info,
"csum failed root %llu ino %llu off %llu csum 0x%08x expected csum 0x%08x mirror %d",
root->objectid, btrfs_ino(inode),
root->root_key.objectid, btrfs_ino(inode),
logical_start, csum, csum_expected, mirror_num);
}
......
......@@ -207,7 +207,7 @@ static void add_root_to_dirty_list(struct btrfs_root *root)
spin_lock(&fs_info->trans_lock);
if (!test_and_set_bit(BTRFS_ROOT_DIRTY, &root->state)) {
/* Want the extent tree to be the last on the list */
if (root->objectid == BTRFS_EXTENT_TREE_OBJECTID)
if (root->root_key.objectid == BTRFS_EXTENT_TREE_OBJECTID)
list_move_tail(&root->dirty_list,
&fs_info->dirty_cowonly_roots);
else
......
......@@ -1202,7 +1202,6 @@ struct btrfs_root {
int last_log_commit;
pid_t log_start_pid;
u64 objectid;
u64 last_trans;
u32 type;
......
......@@ -1462,7 +1462,7 @@ int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
if (unlikely(ret)) {
btrfs_err(trans->fs_info,
"err add delayed dir index item(name: %.*s) into the insertion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)",
name_len, name, delayed_node->root->objectid,
name_len, name, delayed_node->root->root_key.objectid,
delayed_node->inode_id, ret);
BUG();
}
......@@ -1533,7 +1533,8 @@ int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans,
if (unlikely(ret)) {
btrfs_err(trans->fs_info,
"err add delayed dir index item(index: %llu) into the deletion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)",
index, node->root->objectid, node->inode_id, ret);
index, node->root->root_key.objectid,
node->inode_id, ret);
BUG();
}
mutex_unlock(&node->mutex);
......
......@@ -125,8 +125,8 @@ struct async_submit_bio {
* Different roots are used for different purposes and may nest inside each
* other and they require separate keysets. As lockdep keys should be
* static, assign keysets according to the purpose of the root as indicated
* by btrfs_root->objectid. This ensures that all special purpose roots
* have separate keysets.
* by btrfs_root->root_key.objectid. This ensures that all special purpose
* roots have separate keysets.
*
* Lock-nesting across peer nodes is always done with the immediate parent
* node locked thus preventing deadlock. As lockdep doesn't know this, use
......@@ -1148,7 +1148,6 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
root->state = 0;
root->orphan_cleanup_state = 0;
root->objectid = objectid;
root->last_trans = 0;
root->highest_objectid = 0;
root->nr_delalloc_inodes = 0;
......
......@@ -33,7 +33,7 @@ static int btrfs_encode_fh(struct inode *inode, u32 *fh, int *max_len,
type = FILEID_BTRFS_WITHOUT_PARENT;
fid->objectid = btrfs_ino(BTRFS_I(inode));
fid->root_objectid = BTRFS_I(inode)->root->objectid;
fid->root_objectid = BTRFS_I(inode)->root->root_key.objectid;
fid->gen = inode->i_generation;
if (parent) {
......@@ -41,7 +41,7 @@ static int btrfs_encode_fh(struct inode *inode, u32 *fh, int *max_len,
fid->parent_objectid = BTRFS_I(parent)->location.objectid;
fid->parent_gen = parent->i_generation;
parent_root_id = BTRFS_I(parent)->root->objectid;
parent_root_id = BTRFS_I(parent)->root->root_key.objectid;
if (parent_root_id != fid->root_objectid) {
fid->parent_root_objectid = parent_root_id;
......
......@@ -8873,7 +8873,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
int level;
bool root_dropped = false;
btrfs_debug(fs_info, "Drop subvolume %llu", root->objectid);
btrfs_debug(fs_info, "Drop subvolume %llu", root->root_key.objectid);
path = btrfs_alloc_path();
if (!path) {
......
......@@ -6582,7 +6582,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
int drop_inode = 0;
/* do not allow sys_link's with other subvols of the same device */
if (root->objectid != BTRFS_I(inode)->root->objectid)
if (root->root_key.objectid != BTRFS_I(inode)->root->root_key.objectid)
return -EXDEV;
if (inode->i_nlink >= BTRFS_LINK_MAX)
......
......@@ -4392,7 +4392,7 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
ret = PTR_ERR(new_root);
goto out;
}
if (!is_fstree(new_root->objectid)) {
if (!is_fstree(new_root->root_key.objectid)) {
ret = -ENOENT;
goto out;
}
......
......@@ -3004,7 +3004,7 @@ int btrfs_qgroup_reserve_data(struct inode *inode,
int ret;
if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags) ||
!is_fstree(root->objectid) || len == 0)
!is_fstree(root->root_key.objectid) || len == 0)
return 0;
/* @reserved parameter is mandatory for qgroup */
......@@ -3090,7 +3090,7 @@ static int qgroup_free_reserved_data(struct inode *inode,
goto out;
freed += changeset.bytes_changed;
}
btrfs_qgroup_free_refroot(root->fs_info, root->objectid, freed,
btrfs_qgroup_free_refroot(root->fs_info, root->root_key.objectid, freed,
BTRFS_QGROUP_RSV_DATA);
ret = freed;
out:
......@@ -3122,7 +3122,7 @@ static int __btrfs_qgroup_release_data(struct inode *inode,
changeset.bytes_changed, trace_op);
if (free)
btrfs_qgroup_free_refroot(BTRFS_I(inode)->root->fs_info,
BTRFS_I(inode)->root->objectid,
BTRFS_I(inode)->root->root_key.objectid,
changeset.bytes_changed, BTRFS_QGROUP_RSV_DATA);
ret = changeset.bytes_changed;
out:
......@@ -3215,7 +3215,7 @@ int __btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes,
int ret;
if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) ||
!is_fstree(root->objectid) || num_bytes == 0)
!is_fstree(root->root_key.objectid) || num_bytes == 0)
return 0;
BUG_ON(num_bytes != round_down(num_bytes, fs_info->nodesize));
......@@ -3240,13 +3240,13 @@ void btrfs_qgroup_free_meta_all_pertrans(struct btrfs_root *root)
struct btrfs_fs_info *fs_info = root->fs_info;
if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) ||
!is_fstree(root->objectid))
!is_fstree(root->root_key.objectid))
return;
/* TODO: Update trace point to handle such free */
trace_qgroup_meta_free_all_pertrans(root);
/* Special value -1 means to free all reserved space */
btrfs_qgroup_free_refroot(fs_info, root->objectid, (u64)-1,
btrfs_qgroup_free_refroot(fs_info, root->root_key.objectid, (u64)-1,
BTRFS_QGROUP_RSV_META_PERTRANS);
}
......@@ -3256,7 +3256,7 @@ void __btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes,
struct btrfs_fs_info *fs_info = root->fs_info;
if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) ||
!is_fstree(root->objectid))
!is_fstree(root->root_key.objectid))
return;
/*
......@@ -3267,7 +3267,8 @@ void __btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes,
num_bytes = sub_root_meta_rsv(root, num_bytes, type);
BUG_ON(num_bytes != round_down(num_bytes, fs_info->nodesize));
trace_qgroup_meta_reserve(root, type, -(s64)num_bytes);
btrfs_qgroup_free_refroot(fs_info, root->objectid, num_bytes, type);
btrfs_qgroup_free_refroot(fs_info, root->root_key.objectid,
num_bytes, type);
}
static void qgroup_convert_meta(struct btrfs_fs_info *fs_info, u64 ref_root,
......@@ -3321,13 +3322,13 @@ void btrfs_qgroup_convert_reserved_meta(struct btrfs_root *root, int num_bytes)
struct btrfs_fs_info *fs_info = root->fs_info;
if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) ||
!is_fstree(root->objectid))
!is_fstree(root->root_key.objectid))
return;
/* Same as btrfs_qgroup_free_meta_prealloc() */
num_bytes = sub_root_meta_rsv(root, num_bytes,
BTRFS_QGROUP_RSV_META_PREALLOC);
trace_qgroup_meta_convert(root, num_bytes);
qgroup_convert_meta(fs_info, root->objectid, num_bytes);
qgroup_convert_meta(fs_info, root->root_key.objectid, num_bytes);
}
/*
......@@ -3354,7 +3355,7 @@ void btrfs_qgroup_check_reserved_leak(struct inode *inode)
inode->i_ino, unode->val, unode->aux);
}
btrfs_qgroup_free_refroot(BTRFS_I(inode)->root->fs_info,
BTRFS_I(inode)->root->objectid,
BTRFS_I(inode)->root->root_key.objectid,
changeset.bytes_changed, BTRFS_QGROUP_RSV_DATA);
}
......
......@@ -732,7 +732,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
INIT_LIST_HEAD(&ra->list);
ra->action = action;
ra->root = root->objectid;
ra->root = root->root_key.objectid;
/*
* This is an allocation, preallocate the block_entry in case we haven't
......@@ -787,8 +787,8 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
* one we want to lookup below when we modify the
* re->num_refs.
*/
ref_root = root->objectid;
re->root_objectid = root->objectid;
ref_root = root->root_key.objectid;
re->root_objectid = root->root_key.objectid;
re->num_refs = 0;
}
......@@ -862,7 +862,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
* didn't thik of some other corner case.
*/
btrfs_err(fs_info, "failed to find root %llu for %llu",
root->objectid, be->bytenr);
root->root_key.objectid, be->bytenr);
dump_block_entry(fs_info, be);
dump_ref_action(fs_info, ra);
kfree(ra);
......
......@@ -884,7 +884,8 @@ again:
cur->bytenr) {
btrfs_err(root->fs_info,
"couldn't find block (%llu) (level %d) in tree (%llu) with key (%llu %u %llu)",
cur->bytenr, level - 1, root->objectid,
cur->bytenr, level - 1,
root->root_key.objectid,
node_key->objectid, node_key->type,
node_key->offset);
err = -ENOENT;
......
......@@ -1186,9 +1186,9 @@ static int __clone_root_cmp_bsearch(const void *key, const void *elt)
u64 root = (u64)(uintptr_t)key;
struct clone_root *cr = (struct clone_root *)elt;
if (root < cr->root->objectid)
if (root < cr->root->root_key.objectid)
return -1;
if (root > cr->root->objectid)
if (root > cr->root->root_key.objectid)
return 1;
return 0;
}
......@@ -1198,9 +1198,9 @@ static int __clone_root_cmp_sort(const void *e1, const void *e2)
struct clone_root *cr1 = (struct clone_root *)e1;
struct clone_root *cr2 = (struct clone_root *)e2;
if (cr1->root->objectid < cr2->root->objectid)
if (cr1->root->root_key.objectid < cr2->root->root_key.objectid)
return -1;
if (cr1->root->objectid > cr2->root->objectid)
if (cr1->root->root_key.objectid > cr2->root->root_key.objectid)
return 1;
return 0;
}
......@@ -2346,7 +2346,7 @@ static int send_subvol_begin(struct send_ctx *sctx)
return -ENOMEM;
}
key.objectid = send_root->objectid;
key.objectid = send_root->root_key.objectid;
key.type = BTRFS_ROOT_BACKREF_KEY;
key.offset = 0;
......@@ -2362,7 +2362,7 @@ static int send_subvol_begin(struct send_ctx *sctx)
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
if (key.type != BTRFS_ROOT_BACKREF_KEY ||
key.objectid != send_root->objectid) {
key.objectid != send_root->root_key.objectid) {
ret = -ENOENT;
goto out;
}
......@@ -4907,8 +4907,8 @@ static int send_clone(struct send_ctx *sctx,
btrfs_debug(sctx->send_root->fs_info,
"send_clone offset=%llu, len=%d, clone_root=%llu, clone_inode=%llu, clone_offset=%llu",
offset, len, clone_root->root->objectid, clone_root->ino,
clone_root->offset);
offset, len, clone_root->root->root_key.objectid,
clone_root->ino, clone_root->offset);
p = fs_path_alloc();
if (!p)
......
......@@ -2177,8 +2177,10 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_fsid.val[0] = be32_to_cpu(fsid[0]) ^ be32_to_cpu(fsid[2]);
buf->f_fsid.val[1] = be32_to_cpu(fsid[1]) ^ be32_to_cpu(fsid[3]);
/* Mask in the root object ID too, to disambiguate subvols */
buf->f_fsid.val[0] ^= BTRFS_I(d_inode(dentry))->root->objectid >> 32;
buf->f_fsid.val[1] ^= BTRFS_I(d_inode(dentry))->root->objectid;
buf->f_fsid.val[0] ^=
BTRFS_I(d_inode(dentry))->root->root_key.objectid >> 32;
buf->f_fsid.val[1] ^=
BTRFS_I(d_inode(dentry))->root->root_key.objectid;
return 0;
}
......
......@@ -118,7 +118,7 @@ static noinline void switch_commit_roots(struct btrfs_transaction *trans)
list_del_init(&root->dirty_list);
free_extent_buffer(root->commit_root);
root->commit_root = btrfs_root_node(root);
if (is_fstree(root->objectid))
if (is_fstree(root->root_key.objectid))
btrfs_unpin_free_ino(root);
clear_btree_io_tree(&root->dirty_log_pages);
}
......@@ -2329,7 +2329,7 @@ int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root)
list_del_init(&root->root_list);
spin_unlock(&fs_info->trans_lock);
btrfs_debug(fs_info, "cleaner removing %llu", root->objectid);
btrfs_debug(fs_info, "cleaner removing %llu", root->root_key.objectid);
btrfs_kill_all_delayed_nodes(root);
......
......@@ -316,7 +316,7 @@ DECLARE_EVENT_CLASS(btrfs__file_extent_item_regular,
),
TP_fast_assign_btrfs(bi->root->fs_info,
__entry->root_obj = bi->root->objectid;
__entry->root_obj = bi->root->root_key.objectid;
__entry->ino = btrfs_ino(bi);
__entry->isize = bi->vfs_inode.i_size;
__entry->disk_isize = bi->disk_i_size;
......@@ -367,7 +367,7 @@ DECLARE_EVENT_CLASS(
TP_fast_assign_btrfs(
bi->root->fs_info,
__entry->root_obj = bi->root->objectid;
__entry->root_obj = bi->root->root_key.objectid;
__entry->ino = btrfs_ino(bi);
__entry->isize = bi->vfs_inode.i_size;
__entry->disk_isize = bi->disk_i_size;
......@@ -1477,7 +1477,8 @@ DECLARE_EVENT_CLASS(btrfs__qgroup_rsv_data,
),
TP_fast_assign_btrfs(btrfs_sb(inode->i_sb),
__entry->rootid = BTRFS_I(inode)->root->objectid;
__entry->rootid =
BTRFS_I(inode)->root->root_key.objectid;
__entry->ino = btrfs_ino(BTRFS_I(inode));
__entry->start = start;
__entry->len = len;
......@@ -1675,7 +1676,7 @@ TRACE_EVENT(qgroup_meta_reserve,
),
TP_fast_assign_btrfs(root->fs_info,
__entry->refroot = root->objectid;
__entry->refroot = root->root_key.objectid;
__entry->diff = diff;
),
......@@ -1697,7 +1698,7 @@ TRACE_EVENT(qgroup_meta_convert,
),
TP_fast_assign_btrfs(root->fs_info,
__entry->refroot = root->objectid;
__entry->refroot = root->root_key.objectid;
__entry->diff = diff;
),
......@@ -1721,7 +1722,7 @@ TRACE_EVENT(qgroup_meta_free_all_pertrans,
),
TP_fast_assign_btrfs(root->fs_info,
__entry->refroot = root->objectid;
__entry->refroot = root->root_key.objectid;
spin_lock(&root->qgroup_meta_rsv_lock);
__entry->diff = -(s64)root->qgroup_meta_rsv_pertrans;
spin_unlock(&root->qgroup_meta_rsv_lock);
......@@ -1802,7 +1803,7 @@ TRACE_EVENT(btrfs_inode_mod_outstanding_extents,
),
TP_fast_assign_btrfs(root->fs_info,
__entry->root_objectid = root->objectid;
__entry->root_objectid = root->root_key.objectid;
__entry->ino = ino;
__entry->mod = mod;
),
......
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