--- /dev/null
+From b06c4bf5c874a57254b197f53ddf588e7a24a2bf Mon Sep 17 00:00:00 2001
+From: Filipe Manana <fdmanana@suse.com>
+Date: Fri, 23 Oct 2015 07:52:54 +0100
+Subject: Btrfs: fix regression running delayed references when using qgroups
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+From: Filipe Manana <fdmanana@suse.com>
+
+commit b06c4bf5c874a57254b197f53ddf588e7a24a2bf upstream.
+
+In the kernel 4.2 merge window we had a big changes to the implementation
+of delayed references and qgroups which made the no_quota field of delayed
+references not used anymore. More specifically the no_quota field is not
+used anymore as of:
+
+ commit 0ed4792af0e8 ("btrfs: qgroup: Switch to new extent-oriented qgroup mechanism.")
+
+Leaving the no_quota field actually prevents delayed references from
+getting merged, which in turn cause the following BUG_ON(), at
+fs/btrfs/extent-tree.c, to be hit when qgroups are enabled:
+
+ static int run_delayed_tree_ref(...)
+ {
+ (...)
+ BUG_ON(node->ref_mod != 1);
+ (...)
+ }
+
+This happens on a scenario like the following:
+
+ 1) Ref1 bytenr X, action = BTRFS_ADD_DELAYED_REF, no_quota = 1, added.
+
+ 2) Ref2 bytenr X, action = BTRFS_DROP_DELAYED_REF, no_quota = 0, added.
+ It's not merged with Ref1 because Ref1->no_quota != Ref2->no_quota.
+
+ 3) Ref3 bytenr X, action = BTRFS_ADD_DELAYED_REF, no_quota = 1, added.
+ It's not merged with the reference at the tail of the list of refs
+ for bytenr X because the reference at the tail, Ref2 is incompatible
+ due to Ref2->no_quota != Ref3->no_quota.
+
+ 4) Ref4 bytenr X, action = BTRFS_DROP_DELAYED_REF, no_quota = 0, added.
+ It's not merged with the reference at the tail of the list of refs
+ for bytenr X because the reference at the tail, Ref3 is incompatible
+ due to Ref3->no_quota != Ref4->no_quota.
+
+ 5) We run delayed references, trigger merging of delayed references,
+ through __btrfs_run_delayed_refs() -> btrfs_merge_delayed_refs().
+
+ 6) Ref1 and Ref3 are merged as Ref1->no_quota = Ref3->no_quota and
+ all other conditions are satisfied too. So Ref1 gets a ref_mod
+ value of 2.
+
+ 7) Ref2 and Ref4 are merged as Ref2->no_quota = Ref4->no_quota and
+ all other conditions are satisfied too. So Ref2 gets a ref_mod
+ value of 2.
+
+ 8) Ref1 and Ref2 aren't merged, because they have different values
+ for their no_quota field.
+
+ 9) Delayed reference Ref1 is picked for running (select_delayed_ref()
+ always prefers references with an action == BTRFS_ADD_DELAYED_REF).
+ So run_delayed_tree_ref() is called for Ref1 which triggers the
+ BUG_ON because Ref1->red_mod != 1 (equals 2).
+
+So fix this by removing the no_quota field, as it's not used anymore as
+of commit 0ed4792af0e8 ("btrfs: qgroup: Switch to new extent-oriented
+qgroup mechanism.").
+
+The use of no_quota was also buggy in at least two places:
+
+1) At delayed-refs.c:btrfs_add_delayed_tree_ref() - we were setting
+ no_quota to 0 instead of 1 when the following condition was true:
+ is_fstree(ref_root) || !fs_info->quota_enabled
+
+2) At extent-tree.c:__btrfs_inc_extent_ref() - we were attempting to
+ reset a node's no_quota when the condition "!is_fstree(root_objectid)
+ || !root->fs_info->quota_enabled" was true but we did it only in
+ an unused local stack variable, that is, we never reset the no_quota
+ value in the node itself.
+
+This fixes the remainder of problems several people have been having when
+running delayed references, mostly while a balance is running in parallel,
+on a 4.2+ kernel.
+
+Very special thanks to Stéphane Lesimple for helping debugging this issue
+and testing this fix on his multi terabyte filesystem (which took more
+than one day to balance alone, plus fsck, etc).
+
+Also, this fixes deadlock issue when using the clone ioctl with qgroups
+enabled, as reported by Elias Probst in the mailing list. The deadlock
+happens because after calling btrfs_insert_empty_item we have our path
+holding a write lock on a leaf of the fs/subvol tree and then before
+releasing the path we called check_ref() which did backref walking, when
+qgroups are enabled, and tried to read lock the same leaf. The trace for
+this case is the following:
+
+ INFO: task systemd-nspawn:6095 blocked for more than 120 seconds.
+ (...)
+ Call Trace:
+ [<ffffffff86999201>] schedule+0x74/0x83
+ [<ffffffff863ef64c>] btrfs_tree_read_lock+0xc0/0xea
+ [<ffffffff86137ed7>] ? wait_woken+0x74/0x74
+ [<ffffffff8639f0a7>] btrfs_search_old_slot+0x51a/0x810
+ [<ffffffff863a129b>] btrfs_next_old_leaf+0xdf/0x3ce
+ [<ffffffff86413a00>] ? ulist_add_merge+0x1b/0x127
+ [<ffffffff86411688>] __resolve_indirect_refs+0x62a/0x667
+ [<ffffffff863ef546>] ? btrfs_clear_lock_blocking_rw+0x78/0xbe
+ [<ffffffff864122d3>] find_parent_nodes+0xaf3/0xfc6
+ [<ffffffff86412838>] __btrfs_find_all_roots+0x92/0xf0
+ [<ffffffff864128f2>] btrfs_find_all_roots+0x45/0x65
+ [<ffffffff8639a75b>] ? btrfs_get_tree_mod_seq+0x2b/0x88
+ [<ffffffff863e852e>] check_ref+0x64/0xc4
+ [<ffffffff863e9e01>] btrfs_clone+0x66e/0xb5d
+ [<ffffffff863ea77f>] btrfs_ioctl_clone+0x48f/0x5bb
+ [<ffffffff86048a68>] ? native_sched_clock+0x28/0x77
+ [<ffffffff863ed9b0>] btrfs_ioctl+0xabc/0x25cb
+ (...)
+
+The problem goes away by eleminating check_ref(), which no longer is
+needed as its purpose was to get a value for the no_quota field of
+a delayed reference (this patch removes the no_quota field as mentioned
+earlier).
+
+Reported-by: Stéphane Lesimple <stephane_btrfs@lesimple.fr>
+Tested-by: Stéphane Lesimple <stephane_btrfs@lesimple.fr>
+Reported-by: Elias Probst <mail@eliasprobst.eu>
+Reported-by: Peter Becker <floyd.net@gmail.com>
+Reported-by: Malte Schröder <malte@tnxip.de>
+Reported-by: Derek Dongray <derek@valedon.co.uk>
+Reported-by: Erkki Seppala <flux-btrfs@inside.org>
+Signed-off-by: Filipe Manana <fdmanana@suse.com>
+Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ fs/btrfs/ctree.h | 4 -
+ fs/btrfs/delayed-ref.c | 139 ++++++++++++++++++++++++++++++++++++++++++-------
+ fs/btrfs/delayed-ref.h | 7 --
+ fs/btrfs/extent-tree.c | 45 +++++----------
+ fs/btrfs/file.c | 10 +--
+ fs/btrfs/inode.c | 4 -
+ fs/btrfs/ioctl.c | 62 ---------------------
+ fs/btrfs/relocation.c | 16 ++---
+ fs/btrfs/tree-log.c | 2
+ 9 files changed, 156 insertions(+), 133 deletions(-)
+
+--- a/fs/btrfs/ctree.h
++++ b/fs/btrfs/ctree.h
+@@ -3398,7 +3398,7 @@ int btrfs_set_disk_extent_flags(struct b
+ int btrfs_free_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
+- u64 owner, u64 offset, int no_quota);
++ u64 owner, u64 offset);
+
+ int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
+ int delalloc);
+@@ -3411,7 +3411,7 @@ int btrfs_finish_extent_commit(struct bt
+ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 bytenr, u64 num_bytes, u64 parent,
+- u64 root_objectid, u64 owner, u64 offset, int no_quota);
++ u64 root_objectid, u64 owner, u64 offset);
+
+ int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root);
+--- a/fs/btrfs/delayed-ref.c
++++ b/fs/btrfs/delayed-ref.c
+@@ -310,6 +310,119 @@ next:
+ }
+ }
+
++static bool merge_ref(struct btrfs_trans_handle *trans,
++ struct btrfs_delayed_ref_root *delayed_refs,
++ struct btrfs_delayed_ref_head *head,
++ struct btrfs_delayed_ref_node *ref,
++ u64 seq)
++{
++ struct btrfs_delayed_ref_node *next;
++ bool done = false;
++
++ next = list_first_entry(&head->ref_list, struct btrfs_delayed_ref_node,
++ list);
++ while (!done && &next->list != &head->ref_list) {
++ int mod;
++ struct btrfs_delayed_ref_node *next2;
++
++ next2 = list_next_entry(next, list);
++
++ if (next == ref)
++ goto next;
++
++ if (seq && next->seq >= seq)
++ goto next;
++
++ if (next->type != ref->type)
++ goto next;
++
++ if ((ref->type == BTRFS_TREE_BLOCK_REF_KEY ||
++ ref->type == BTRFS_SHARED_BLOCK_REF_KEY) &&
++ comp_tree_refs(btrfs_delayed_node_to_tree_ref(ref),
++ btrfs_delayed_node_to_tree_ref(next),
++ ref->type))
++ goto next;
++ if ((ref->type == BTRFS_EXTENT_DATA_REF_KEY ||
++ ref->type == BTRFS_SHARED_DATA_REF_KEY) &&
++ comp_data_refs(btrfs_delayed_node_to_data_ref(ref),
++ btrfs_delayed_node_to_data_ref(next)))
++ goto next;
++
++ if (ref->action == next->action) {
++ mod = next->ref_mod;
++ } else {
++ if (ref->ref_mod < next->ref_mod) {
++ swap(ref, next);
++ done = true;
++ }
++ mod = -next->ref_mod;
++ }
++
++ drop_delayed_ref(trans, delayed_refs, head, next);
++ ref->ref_mod += mod;
++ if (ref->ref_mod == 0) {
++ drop_delayed_ref(trans, delayed_refs, head, ref);
++ done = true;
++ } else {
++ /*
++ * Can't have multiples of the same ref on a tree block.
++ */
++ WARN_ON(ref->type == BTRFS_TREE_BLOCK_REF_KEY ||
++ ref->type == BTRFS_SHARED_BLOCK_REF_KEY);
++ }
++next:
++ next = next2;
++ }
++
++ return done;
++}
++
++void btrfs_merge_delayed_refs(struct btrfs_trans_handle *trans,
++ struct btrfs_fs_info *fs_info,
++ struct btrfs_delayed_ref_root *delayed_refs,
++ struct btrfs_delayed_ref_head *head)
++{
++ struct btrfs_delayed_ref_node *ref;
++ u64 seq = 0;
++
++ assert_spin_locked(&head->lock);
++
++ if (list_empty(&head->ref_list))
++ return;
++
++ /* We don't have too many refs to merge for data. */
++ if (head->is_data)
++ return;
++
++ spin_lock(&fs_info->tree_mod_seq_lock);
++ if (!list_empty(&fs_info->tree_mod_seq_list)) {
++ struct seq_list *elem;
++
++ elem = list_first_entry(&fs_info->tree_mod_seq_list,
++ struct seq_list, list);
++ seq = elem->seq;
++ }
++ spin_unlock(&fs_info->tree_mod_seq_lock);
++
++ ref = list_first_entry(&head->ref_list, struct btrfs_delayed_ref_node,
++ list);
++ while (&ref->list != &head->ref_list) {
++ if (seq && ref->seq >= seq)
++ goto next;
++
++ if (merge_ref(trans, delayed_refs, head, ref, seq)) {
++ if (list_empty(&head->ref_list))
++ break;
++ ref = list_first_entry(&head->ref_list,
++ struct btrfs_delayed_ref_node,
++ list);
++ continue;
++ }
++next:
++ ref = list_next_entry(ref, list);
++ }
++}
++
+ int btrfs_check_delayed_seq(struct btrfs_fs_info *fs_info,
+ struct btrfs_delayed_ref_root *delayed_refs,
+ u64 seq)
+@@ -405,8 +518,7 @@ add_delayed_ref_tail_merge(struct btrfs_
+ exist = list_entry(href->ref_list.prev, struct btrfs_delayed_ref_node,
+ list);
+ /* No need to compare bytenr nor is_head */
+- if (exist->type != ref->type || exist->no_quota != ref->no_quota ||
+- exist->seq != ref->seq)
++ if (exist->type != ref->type || exist->seq != ref->seq)
+ goto add_tail;
+
+ if ((exist->type == BTRFS_TREE_BLOCK_REF_KEY ||
+@@ -637,7 +749,7 @@ add_delayed_tree_ref(struct btrfs_fs_inf
+ struct btrfs_delayed_ref_head *head_ref,
+ struct btrfs_delayed_ref_node *ref, u64 bytenr,
+ u64 num_bytes, u64 parent, u64 ref_root, int level,
+- int action, int no_quota)
++ int action)
+ {
+ struct btrfs_delayed_tree_ref *full_ref;
+ struct btrfs_delayed_ref_root *delayed_refs;
+@@ -659,7 +771,6 @@ add_delayed_tree_ref(struct btrfs_fs_inf
+ ref->action = action;
+ ref->is_head = 0;
+ ref->in_tree = 1;
+- ref->no_quota = no_quota;
+ ref->seq = seq;
+
+ full_ref = btrfs_delayed_node_to_tree_ref(ref);
+@@ -692,7 +803,7 @@ add_delayed_data_ref(struct btrfs_fs_inf
+ struct btrfs_delayed_ref_head *head_ref,
+ struct btrfs_delayed_ref_node *ref, u64 bytenr,
+ u64 num_bytes, u64 parent, u64 ref_root, u64 owner,
+- u64 offset, int action, int no_quota)
++ u64 offset, int action)
+ {
+ struct btrfs_delayed_data_ref *full_ref;
+ struct btrfs_delayed_ref_root *delayed_refs;
+@@ -715,7 +826,6 @@ add_delayed_data_ref(struct btrfs_fs_inf
+ ref->action = action;
+ ref->is_head = 0;
+ ref->in_tree = 1;
+- ref->no_quota = no_quota;
+ ref->seq = seq;
+
+ full_ref = btrfs_delayed_node_to_data_ref(ref);
+@@ -746,17 +856,13 @@ int btrfs_add_delayed_tree_ref(struct bt
+ struct btrfs_trans_handle *trans,
+ u64 bytenr, u64 num_bytes, u64 parent,
+ u64 ref_root, int level, int action,
+- struct btrfs_delayed_extent_op *extent_op,
+- int no_quota)
++ struct btrfs_delayed_extent_op *extent_op)
+ {
+ struct btrfs_delayed_tree_ref *ref;
+ struct btrfs_delayed_ref_head *head_ref;
+ struct btrfs_delayed_ref_root *delayed_refs;
+ struct btrfs_qgroup_extent_record *record = NULL;
+
+- if (!is_fstree(ref_root) || !fs_info->quota_enabled)
+- no_quota = 0;
+-
+ BUG_ON(extent_op && extent_op->is_data);
+ ref = kmem_cache_alloc(btrfs_delayed_tree_ref_cachep, GFP_NOFS);
+ if (!ref)
+@@ -785,8 +891,7 @@ int btrfs_add_delayed_tree_ref(struct bt
+ bytenr, num_bytes, action, 0);
+
+ add_delayed_tree_ref(fs_info, trans, head_ref, &ref->node, bytenr,
+- num_bytes, parent, ref_root, level, action,
+- no_quota);
++ num_bytes, parent, ref_root, level, action);
+ spin_unlock(&delayed_refs->lock);
+
+ return 0;
+@@ -807,17 +912,13 @@ int btrfs_add_delayed_data_ref(struct bt
+ u64 bytenr, u64 num_bytes,
+ u64 parent, u64 ref_root,
+ u64 owner, u64 offset, int action,
+- struct btrfs_delayed_extent_op *extent_op,
+- int no_quota)
++ struct btrfs_delayed_extent_op *extent_op)
+ {
+ struct btrfs_delayed_data_ref *ref;
+ struct btrfs_delayed_ref_head *head_ref;
+ struct btrfs_delayed_ref_root *delayed_refs;
+ struct btrfs_qgroup_extent_record *record = NULL;
+
+- if (!is_fstree(ref_root) || !fs_info->quota_enabled)
+- no_quota = 0;
+-
+ BUG_ON(extent_op && !extent_op->is_data);
+ ref = kmem_cache_alloc(btrfs_delayed_data_ref_cachep, GFP_NOFS);
+ if (!ref)
+@@ -853,7 +954,7 @@ int btrfs_add_delayed_data_ref(struct bt
+
+ add_delayed_data_ref(fs_info, trans, head_ref, &ref->node, bytenr,
+ num_bytes, parent, ref_root, owner, offset,
+- action, no_quota);
++ action);
+ spin_unlock(&delayed_refs->lock);
+
+ return 0;
+--- a/fs/btrfs/delayed-ref.h
++++ b/fs/btrfs/delayed-ref.h
+@@ -68,7 +68,6 @@ struct btrfs_delayed_ref_node {
+
+ unsigned int action:8;
+ unsigned int type:8;
+- unsigned int no_quota:1;
+ /* is this node still in the rbtree? */
+ unsigned int is_head:1;
+ unsigned int in_tree:1;
+@@ -233,15 +232,13 @@ int btrfs_add_delayed_tree_ref(struct bt
+ struct btrfs_trans_handle *trans,
+ u64 bytenr, u64 num_bytes, u64 parent,
+ u64 ref_root, int level, int action,
+- struct btrfs_delayed_extent_op *extent_op,
+- int no_quota);
++ struct btrfs_delayed_extent_op *extent_op);
+ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
+ struct btrfs_trans_handle *trans,
+ u64 bytenr, u64 num_bytes,
+ u64 parent, u64 ref_root,
+ u64 owner, u64 offset, int action,
+- struct btrfs_delayed_extent_op *extent_op,
+- int no_quota);
++ struct btrfs_delayed_extent_op *extent_op);
+ int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
+ struct btrfs_trans_handle *trans,
+ u64 bytenr, u64 num_bytes,
+--- a/fs/btrfs/extent-tree.c
++++ b/fs/btrfs/extent-tree.c
+@@ -95,8 +95,7 @@ static int alloc_reserved_tree_block(str
+ struct btrfs_root *root,
+ u64 parent, u64 root_objectid,
+ u64 flags, struct btrfs_disk_key *key,
+- int level, struct btrfs_key *ins,
+- int no_quota);
++ int level, struct btrfs_key *ins);
+ static int do_chunk_alloc(struct btrfs_trans_handle *trans,
+ struct btrfs_root *extent_root, u64 flags,
+ int force);
+@@ -2009,8 +2008,7 @@ int btrfs_discard_extent(struct btrfs_ro
+ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 bytenr, u64 num_bytes, u64 parent,
+- u64 root_objectid, u64 owner, u64 offset,
+- int no_quota)
++ u64 root_objectid, u64 owner, u64 offset)
+ {
+ int ret;
+ struct btrfs_fs_info *fs_info = root->fs_info;
+@@ -2022,12 +2020,12 @@ int btrfs_inc_extent_ref(struct btrfs_tr
+ ret = btrfs_add_delayed_tree_ref(fs_info, trans, bytenr,
+ num_bytes,
+ parent, root_objectid, (int)owner,
+- BTRFS_ADD_DELAYED_REF, NULL, no_quota);
++ BTRFS_ADD_DELAYED_REF, NULL);
+ } else {
+ ret = btrfs_add_delayed_data_ref(fs_info, trans, bytenr,
+ num_bytes,
+ parent, root_objectid, owner, offset,
+- BTRFS_ADD_DELAYED_REF, NULL, no_quota);
++ BTRFS_ADD_DELAYED_REF, NULL);
+ }
+ return ret;
+ }
+@@ -2048,15 +2046,11 @@ static int __btrfs_inc_extent_ref(struct
+ u64 num_bytes = node->num_bytes;
+ u64 refs;
+ int ret;
+- int no_quota = node->no_quota;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+- if (!is_fstree(root_objectid) || !root->fs_info->quota_enabled)
+- no_quota = 1;
+-
+ path->reada = 1;
+ path->leave_spinning = 1;
+ /* this will setup the path even if it fails to insert the back ref */
+@@ -2291,8 +2285,7 @@ static int run_delayed_tree_ref(struct b
+ parent, ref_root,
+ extent_op->flags_to_set,
+ &extent_op->key,
+- ref->level, &ins,
+- node->no_quota);
++ ref->level, &ins);
+ } else if (node->action == BTRFS_ADD_DELAYED_REF) {
+ ret = __btrfs_inc_extent_ref(trans, root, node,
+ parent, ref_root,
+@@ -3123,7 +3116,7 @@ static int __btrfs_mod_ref(struct btrfs_
+ int level;
+ int ret = 0;
+ int (*process_func)(struct btrfs_trans_handle *, struct btrfs_root *,
+- u64, u64, u64, u64, u64, u64, int);
++ u64, u64, u64, u64, u64, u64);
+
+
+ if (btrfs_test_is_dummy_root(root))
+@@ -3164,15 +3157,14 @@ static int __btrfs_mod_ref(struct btrfs_
+ key.offset -= btrfs_file_extent_offset(buf, fi);
+ ret = process_func(trans, root, bytenr, num_bytes,
+ parent, ref_root, key.objectid,
+- key.offset, 1);
++ key.offset);
+ if (ret)
+ goto fail;
+ } else {
+ bytenr = btrfs_node_blockptr(buf, i);
+ num_bytes = root->nodesize;
+ ret = process_func(trans, root, bytenr, num_bytes,
+- parent, ref_root, level - 1, 0,
+- 1);
++ parent, ref_root, level - 1, 0);
+ if (ret)
+ goto fail;
+ }
+@@ -6247,7 +6239,6 @@ static int __btrfs_free_extent(struct bt
+ int extent_slot = 0;
+ int found_extent = 0;
+ int num_to_del = 1;
+- int no_quota = node->no_quota;
+ u32 item_size;
+ u64 refs;
+ u64 bytenr = node->bytenr;
+@@ -6256,9 +6247,6 @@ static int __btrfs_free_extent(struct bt
+ bool skinny_metadata = btrfs_fs_incompat(root->fs_info,
+ SKINNY_METADATA);
+
+- if (!info->quota_enabled || !is_fstree(root_objectid))
+- no_quota = 1;
+-
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+@@ -6584,7 +6572,7 @@ void btrfs_free_tree_block(struct btrfs_
+ buf->start, buf->len,
+ parent, root->root_key.objectid,
+ btrfs_header_level(buf),
+- BTRFS_DROP_DELAYED_REF, NULL, 0);
++ BTRFS_DROP_DELAYED_REF, NULL);
+ BUG_ON(ret); /* -ENOMEM */
+ }
+
+@@ -6632,7 +6620,7 @@ out:
+ /* Can return -ENOMEM */
+ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+ u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
+- u64 owner, u64 offset, int no_quota)
++ u64 owner, u64 offset)
+ {
+ int ret;
+ struct btrfs_fs_info *fs_info = root->fs_info;
+@@ -6655,13 +6643,13 @@ int btrfs_free_extent(struct btrfs_trans
+ ret = btrfs_add_delayed_tree_ref(fs_info, trans, bytenr,
+ num_bytes,
+ parent, root_objectid, (int)owner,
+- BTRFS_DROP_DELAYED_REF, NULL, no_quota);
++ BTRFS_DROP_DELAYED_REF, NULL);
+ } else {
+ ret = btrfs_add_delayed_data_ref(fs_info, trans, bytenr,
+ num_bytes,
+ parent, root_objectid, owner,
+ offset, BTRFS_DROP_DELAYED_REF,
+- NULL, no_quota);
++ NULL);
+ }
+ return ret;
+ }
+@@ -7443,8 +7431,7 @@ static int alloc_reserved_tree_block(str
+ struct btrfs_root *root,
+ u64 parent, u64 root_objectid,
+ u64 flags, struct btrfs_disk_key *key,
+- int level, struct btrfs_key *ins,
+- int no_quota)
++ int level, struct btrfs_key *ins)
+ {
+ int ret;
+ struct btrfs_fs_info *fs_info = root->fs_info;
+@@ -7534,7 +7521,7 @@ int btrfs_alloc_reserved_file_extent(str
+ ret = btrfs_add_delayed_data_ref(root->fs_info, trans, ins->objectid,
+ ins->offset, 0,
+ root_objectid, owner, offset,
+- BTRFS_ADD_DELAYED_EXTENT, NULL, 0);
++ BTRFS_ADD_DELAYED_EXTENT, NULL);
+ return ret;
+ }
+
+@@ -7748,7 +7735,7 @@ struct extent_buffer *btrfs_alloc_tree_b
+ ins.objectid, ins.offset,
+ parent, root_objectid, level,
+ BTRFS_ADD_DELAYED_EXTENT,
+- extent_op, 0);
++ extent_op);
+ if (ret)
+ goto out_free_delayed;
+ }
+@@ -8296,7 +8283,7 @@ skip:
+ }
+ }
+ ret = btrfs_free_extent(trans, root, bytenr, blocksize, parent,
+- root->root_key.objectid, level - 1, 0, 0);
++ root->root_key.objectid, level - 1, 0);
+ BUG_ON(ret); /* -ENOMEM */
+ }
+ btrfs_tree_unlock(next);
+--- a/fs/btrfs/file.c
++++ b/fs/btrfs/file.c
+@@ -855,7 +855,7 @@ next_slot:
+ disk_bytenr, num_bytes, 0,
+ root->root_key.objectid,
+ new_key.objectid,
+- start - extent_offset, 1);
++ start - extent_offset);
+ BUG_ON(ret); /* -ENOMEM */
+ }
+ key.offset = start;
+@@ -933,7 +933,7 @@ delete_extent_item:
+ disk_bytenr, num_bytes, 0,
+ root->root_key.objectid,
+ key.objectid, key.offset -
+- extent_offset, 0);
++ extent_offset);
+ BUG_ON(ret); /* -ENOMEM */
+ inode_sub_bytes(inode,
+ extent_end - key.offset);
+@@ -1212,7 +1212,7 @@ again:
+
+ ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes, 0,
+ root->root_key.objectid,
+- ino, orig_offset, 1);
++ ino, orig_offset);
+ BUG_ON(ret); /* -ENOMEM */
+
+ if (split == start) {
+@@ -1239,7 +1239,7 @@ again:
+ del_nr++;
+ ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
+ 0, root->root_key.objectid,
+- ino, orig_offset, 0);
++ ino, orig_offset);
+ BUG_ON(ret); /* -ENOMEM */
+ }
+ other_start = 0;
+@@ -1256,7 +1256,7 @@ again:
+ del_nr++;
+ ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
+ 0, root->root_key.objectid,
+- ino, orig_offset, 0);
++ ino, orig_offset);
+ BUG_ON(ret); /* -ENOMEM */
+ }
+ if (del_nr == 0) {
+--- a/fs/btrfs/inode.c
++++ b/fs/btrfs/inode.c
+@@ -2579,7 +2579,7 @@ again:
+ ret = btrfs_inc_extent_ref(trans, root, new->bytenr,
+ new->disk_len, 0,
+ backref->root_id, backref->inum,
+- new->file_pos, 0); /* start - extent_offset */
++ new->file_pos); /* start - extent_offset */
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_free_path;
+@@ -4521,7 +4521,7 @@ delete:
+ ret = btrfs_free_extent(trans, root, extent_start,
+ extent_num_bytes, 0,
+ btrfs_header_owner(leaf),
+- ino, extent_offset, 0);
++ ino, extent_offset);
+ BUG_ON(ret);
+ if (btrfs_should_throttle_delayed_refs(trans, root))
+ btrfs_async_run_delayed_refs(root,
+--- a/fs/btrfs/ioctl.c
++++ b/fs/btrfs/ioctl.c
+@@ -3203,41 +3203,6 @@ out:
+ return ret;
+ }
+
+-/* Helper to check and see if this root currently has a ref on the given disk
+- * bytenr. If it does then we need to update the quota for this root. This
+- * doesn't do anything if quotas aren't enabled.
+- */
+-static int check_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+- u64 disko)
+-{
+- struct seq_list tree_mod_seq_elem = SEQ_LIST_INIT(tree_mod_seq_elem);
+- struct ulist *roots;
+- struct ulist_iterator uiter;
+- struct ulist_node *root_node = NULL;
+- int ret;
+-
+- if (!root->fs_info->quota_enabled)
+- return 1;
+-
+- btrfs_get_tree_mod_seq(root->fs_info, &tree_mod_seq_elem);
+- ret = btrfs_find_all_roots(trans, root->fs_info, disko,
+- tree_mod_seq_elem.seq, &roots);
+- if (ret < 0)
+- goto out;
+- ret = 0;
+- ULIST_ITER_INIT(&uiter);
+- while ((root_node = ulist_next(roots, &uiter))) {
+- if (root_node->val == root->objectid) {
+- ret = 1;
+- break;
+- }
+- }
+- ulist_free(roots);
+-out:
+- btrfs_put_tree_mod_seq(root->fs_info, &tree_mod_seq_elem);
+- return ret;
+-}
+-
+ static int clone_finish_inode_update(struct btrfs_trans_handle *trans,
+ struct inode *inode,
+ u64 endoff,
+@@ -3496,9 +3461,7 @@ static int btrfs_clone(struct inode *src
+ u32 nritems;
+ int slot;
+ int ret;
+- int no_quota;
+ const u64 len = olen_aligned;
+- u64 last_disko = 0;
+ u64 last_dest_end = destoff;
+
+ ret = -ENOMEM;
+@@ -3544,7 +3507,6 @@ static int btrfs_clone(struct inode *src
+
+ nritems = btrfs_header_nritems(path->nodes[0]);
+ process_slot:
+- no_quota = 1;
+ if (path->slots[0] >= nritems) {
+ ret = btrfs_next_leaf(BTRFS_I(src)->root, path);
+ if (ret < 0)
+@@ -3696,35 +3658,13 @@ process_slot:
+ btrfs_set_file_extent_num_bytes(leaf, extent,
+ datal);
+
+- /*
+- * We need to look up the roots that point at
+- * this bytenr and see if the new root does. If
+- * it does not we need to make sure we update
+- * quotas appropriately.
+- */
+- if (disko && root != BTRFS_I(src)->root &&
+- disko != last_disko) {
+- no_quota = check_ref(trans, root,
+- disko);
+- if (no_quota < 0) {
+- btrfs_abort_transaction(trans,
+- root,
+- ret);
+- btrfs_end_transaction(trans,
+- root);
+- ret = no_quota;
+- goto out;
+- }
+- }
+-
+ if (disko) {
+ inode_add_bytes(inode, datal);
+ ret = btrfs_inc_extent_ref(trans, root,
+ disko, diskl, 0,
+ root->root_key.objectid,
+ btrfs_ino(inode),
+- new_key.offset - datao,
+- no_quota);
++ new_key.offset - datao);
+ if (ret) {
+ btrfs_abort_transaction(trans,
+ root,
+--- a/fs/btrfs/relocation.c
++++ b/fs/btrfs/relocation.c
+@@ -1716,7 +1716,7 @@ int replace_file_extents(struct btrfs_tr
+ ret = btrfs_inc_extent_ref(trans, root, new_bytenr,
+ num_bytes, parent,
+ btrfs_header_owner(leaf),
+- key.objectid, key.offset, 1);
++ key.objectid, key.offset);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ break;
+@@ -1724,7 +1724,7 @@ int replace_file_extents(struct btrfs_tr
+
+ ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
+ parent, btrfs_header_owner(leaf),
+- key.objectid, key.offset, 1);
++ key.objectid, key.offset);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ break;
+@@ -1900,23 +1900,21 @@ again:
+
+ ret = btrfs_inc_extent_ref(trans, src, old_bytenr, blocksize,
+ path->nodes[level]->start,
+- src->root_key.objectid, level - 1, 0,
+- 1);
++ src->root_key.objectid, level - 1, 0);
+ BUG_ON(ret);
+ ret = btrfs_inc_extent_ref(trans, dest, new_bytenr, blocksize,
+ 0, dest->root_key.objectid, level - 1,
+- 0, 1);
++ 0);
+ BUG_ON(ret);
+
+ ret = btrfs_free_extent(trans, src, new_bytenr, blocksize,
+ path->nodes[level]->start,
+- src->root_key.objectid, level - 1, 0,
+- 1);
++ src->root_key.objectid, level - 1, 0);
+ BUG_ON(ret);
+
+ ret = btrfs_free_extent(trans, dest, old_bytenr, blocksize,
+ 0, dest->root_key.objectid, level - 1,
+- 0, 1);
++ 0);
+ BUG_ON(ret);
+
+ btrfs_unlock_up_safe(path, 0);
+@@ -2745,7 +2743,7 @@ static int do_relocation(struct btrfs_tr
+ node->eb->start, blocksize,
+ upper->eb->start,
+ btrfs_header_owner(upper->eb),
+- node->level, 0, 1);
++ node->level, 0);
+ BUG_ON(ret);
+
+ ret = btrfs_drop_subtree(trans, root, eb, upper->eb);
+--- a/fs/btrfs/tree-log.c
++++ b/fs/btrfs/tree-log.c
+@@ -691,7 +691,7 @@ static noinline int replay_one_extent(st
+ ret = btrfs_inc_extent_ref(trans, root,
+ ins.objectid, ins.offset,
+ 0, root->root_key.objectid,
+- key->objectid, offset, 0);
++ key->objectid, offset);
+ if (ret)
+ goto out;
+ } else {
projects / thirdparty / kernel / stable-queue.git / commitdiff
