commit: 3a9d9184e1f0d412574eabf24e5cd3586f69d3e9 Author: Mike Pagano <mpagano <AT> gentoo <DOT> org> AuthorDate: Tue Dec 15 11:15:05 2015 +0000 Commit: Mike Pagano <mpagano <AT> gentoo <DOT> org> CommitDate: Tue Dec 15 11:15:05 2015 +0000 URL: https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=3a9d9184
Linux patch 4.2.8 0000_README | 4 + 1007_linux-4.2.8.patch | 3882 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 3886 insertions(+) diff --git a/0000_README b/0000_README index 2299001..5645178 100644 --- a/0000_README +++ b/0000_README @@ -71,6 +71,10 @@ Patch: 1006_linux-4.2.7.patch From: http://www.kernel.org Desc: Linux 4.2.7 +Patch: 1007_linux-4.2.8.patch +From: http://www.kernel.org +Desc: Linux 4.2.8 + Patch: 1500_XATTR_USER_PREFIX.patch From: https://bugs.gentoo.org/show_bug.cgi?id=470644 Desc: Support for namespace user.pax.* on tmpfs. diff --git a/1007_linux-4.2.8.patch b/1007_linux-4.2.8.patch new file mode 100644 index 0000000..7aca417 --- /dev/null +++ b/1007_linux-4.2.8.patch @@ -0,0 +1,3882 @@ +diff --git a/Makefile b/Makefile +index f5014eaf2532..06b988951ccb 100644 +--- a/Makefile ++++ b/Makefile +@@ -1,6 +1,6 @@ + VERSION = 4 + PATCHLEVEL = 2 +-SUBLEVEL = 7 ++SUBLEVEL = 8 + EXTRAVERSION = + NAME = Hurr durr I'ma sheep + +diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c +index 017b7d58ae06..55f8a6a706fc 100644 +--- a/drivers/block/rbd.c ++++ b/drivers/block/rbd.c +@@ -3439,6 +3439,7 @@ static void rbd_queue_workfn(struct work_struct *work) + goto err_rq; + } + img_request->rq = rq; ++ snapc = NULL; /* img_request consumes a ref */ + + if (op_type == OBJ_OP_DISCARD) + result = rbd_img_request_fill(img_request, OBJ_REQUEST_NODATA, +diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c +index f51d376d10ba..c2f5117fd8cb 100644 +--- a/drivers/firewire/ohci.c ++++ b/drivers/firewire/ohci.c +@@ -3675,6 +3675,11 @@ static int pci_probe(struct pci_dev *dev, + + reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0); + ohci->it_context_support = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet); ++ /* JMicron JMB38x often shows 0 at first read, just ignore it */ ++ if (!ohci->it_context_support) { ++ ohci_notice(ohci, "overriding IsoXmitIntMask\n"); ++ ohci->it_context_support = 0xf; ++ } + reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0); + ohci->it_context_mask = ohci->it_context_support; + ohci->n_it = hweight32(ohci->it_context_mask); +diff --git a/drivers/media/pci/cobalt/Kconfig b/drivers/media/pci/cobalt/Kconfig +index 6a1c0089bb62..4ecf171d14a2 100644 +--- a/drivers/media/pci/cobalt/Kconfig ++++ b/drivers/media/pci/cobalt/Kconfig +@@ -1,6 +1,6 @@ + config VIDEO_COBALT + tristate "Cisco Cobalt support" +- depends on VIDEO_V4L2 && I2C && MEDIA_CONTROLLER ++ depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API + depends on PCI_MSI && MTD_COMPLEX_MAPPINGS && GPIOLIB + depends on SND + select I2C_ALGOBIT +diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c +index 3b90afb8c293..6f2a748524f3 100644 +--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c ++++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c +@@ -1325,7 +1325,12 @@ err_disable_device: + static void nicvf_remove(struct pci_dev *pdev) + { + struct net_device *netdev = pci_get_drvdata(pdev); +- struct nicvf *nic = netdev_priv(netdev); ++ struct nicvf *nic; ++ ++ if (!netdev) ++ return; ++ ++ nic = netdev_priv(netdev); + + unregister_netdev(netdev); + nicvf_unregister_interrupts(nic); +diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c +index 731423ca575d..8bead97373ab 100644 +--- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c ++++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c +@@ -4934,26 +4934,41 @@ static void rem_slave_counters(struct mlx4_dev *dev, int slave) + struct res_counter *counter; + struct res_counter *tmp; + int err; +- int index; ++ int *counters_arr = NULL; ++ int i, j; + + err = move_all_busy(dev, slave, RES_COUNTER); + if (err) + mlx4_warn(dev, "rem_slave_counters: Could not move all counters - too busy for slave %d\n", + slave); + +- spin_lock_irq(mlx4_tlock(dev)); +- list_for_each_entry_safe(counter, tmp, counter_list, com.list) { +- if (counter->com.owner == slave) { +- index = counter->com.res_id; +- rb_erase(&counter->com.node, +- &tracker->res_tree[RES_COUNTER]); +- list_del(&counter->com.list); +- kfree(counter); +- __mlx4_counter_free(dev, index); ++ counters_arr = kmalloc_array(dev->caps.max_counters, ++ sizeof(*counters_arr), GFP_KERNEL); ++ if (!counters_arr) ++ return; ++ ++ do { ++ i = 0; ++ j = 0; ++ spin_lock_irq(mlx4_tlock(dev)); ++ list_for_each_entry_safe(counter, tmp, counter_list, com.list) { ++ if (counter->com.owner == slave) { ++ counters_arr[i++] = counter->com.res_id; ++ rb_erase(&counter->com.node, ++ &tracker->res_tree[RES_COUNTER]); ++ list_del(&counter->com.list); ++ kfree(counter); ++ } ++ } ++ spin_unlock_irq(mlx4_tlock(dev)); ++ ++ while (j < i) { ++ __mlx4_counter_free(dev, counters_arr[j++]); + mlx4_release_resource(dev, slave, RES_COUNTER, 1, 0); + } +- } +- spin_unlock_irq(mlx4_tlock(dev)); ++ } while (i); ++ ++ kfree(counters_arr); + } + + static void rem_slave_xrcdns(struct mlx4_dev *dev, int slave) +diff --git a/drivers/net/ethernet/via/via-rhine.c b/drivers/net/ethernet/via/via-rhine.c +index a83263743665..2b7550c43f78 100644 +--- a/drivers/net/ethernet/via/via-rhine.c ++++ b/drivers/net/ethernet/via/via-rhine.c +@@ -2134,10 +2134,11 @@ static int rhine_rx(struct net_device *dev, int limit) + } + + skb_put(skb, pkt_len); +- skb->protocol = eth_type_trans(skb, dev); + + rhine_rx_vlan_tag(skb, desc, data_size); + ++ skb->protocol = eth_type_trans(skb, dev); ++ + netif_receive_skb(skb); + + u64_stats_update_begin(&rp->rx_stats.syncp); +diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c +index 9c71295f2fef..85e640440bd9 100644 +--- a/drivers/net/phy/broadcom.c ++++ b/drivers/net/phy/broadcom.c +@@ -675,7 +675,7 @@ static struct mdio_device_id __maybe_unused broadcom_tbl[] = { + { PHY_ID_BCM5461, 0xfffffff0 }, + { PHY_ID_BCM54616S, 0xfffffff0 }, + { PHY_ID_BCM5464, 0xfffffff0 }, +- { PHY_ID_BCM5482, 0xfffffff0 }, ++ { PHY_ID_BCM5481, 0xfffffff0 }, + { PHY_ID_BCM5482, 0xfffffff0 }, + { PHY_ID_BCM50610, 0xfffffff0 }, + { PHY_ID_BCM50610M, 0xfffffff0 }, +diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c +index 8f1738c3b3c5..de27f510c0f3 100644 +--- a/drivers/net/usb/qmi_wwan.c ++++ b/drivers/net/usb/qmi_wwan.c +@@ -775,6 +775,7 @@ static const struct usb_device_id products[] = { + {QMI_FIXED_INTF(0x2357, 0x9000, 4)}, /* TP-LINK MA260 */ + {QMI_FIXED_INTF(0x1bc7, 0x1200, 5)}, /* Telit LE920 */ + {QMI_FIXED_INTF(0x1bc7, 0x1201, 2)}, /* Telit LE920 */ ++ {QMI_FIXED_INTF(0x1c9e, 0x9b01, 3)}, /* XS Stick W100-2 from 4G Systems */ + {QMI_FIXED_INTF(0x0b3c, 0xc000, 4)}, /* Olivetti Olicard 100 */ + {QMI_FIXED_INTF(0x0b3c, 0xc001, 4)}, /* Olivetti Olicard 120 */ + {QMI_FIXED_INTF(0x0b3c, 0xc002, 4)}, /* Olivetti Olicard 140 */ +diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h +index aac314e14188..bb25b8d00570 100644 +--- a/fs/btrfs/ctree.h ++++ b/fs/btrfs/ctree.h +@@ -3404,7 +3404,7 @@ int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, + 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); +@@ -3417,7 +3417,7 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, + 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); +diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c +index ac3e81da6d4e..7832031fef68 100644 +--- a/fs/btrfs/delayed-ref.c ++++ b/fs/btrfs/delayed-ref.c +@@ -197,6 +197,119 @@ static inline void drop_delayed_ref(struct btrfs_trans_handle *trans, + trans->delayed_ref_updates--; + } + ++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) +@@ -292,8 +405,7 @@ add_delayed_ref_tail_merge(struct btrfs_trans_handle *trans, + 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 || +@@ -524,7 +636,7 @@ add_delayed_tree_ref(struct btrfs_fs_info *fs_info, + 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; +@@ -546,7 +658,6 @@ add_delayed_tree_ref(struct btrfs_fs_info *fs_info, + 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); +@@ -579,7 +690,7 @@ add_delayed_data_ref(struct btrfs_fs_info *fs_info, + 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; +@@ -602,7 +713,6 @@ add_delayed_data_ref(struct btrfs_fs_info *fs_info, + 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); +@@ -633,17 +743,13 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info, + 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) +@@ -672,8 +778,7 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info, + 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; +@@ -694,17 +799,13 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info, + 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) +@@ -740,7 +841,7 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info, + + 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; +diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h +index 13fb5e6090fe..930887a4275f 100644 +--- 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 btrfs_fs_info *fs_info, + 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, +diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c +index 07204bf601ed..5d870c4eac05 100644 +--- a/fs/btrfs/extent-tree.c ++++ b/fs/btrfs/extent-tree.c +@@ -95,8 +95,7 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans, + 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); +@@ -1941,8 +1940,7 @@ int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, + 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; +@@ -1954,12 +1952,12 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, + 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; + } +@@ -1980,15 +1978,11 @@ static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, + 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 */ +@@ -2223,8 +2217,7 @@ static int run_delayed_tree_ref(struct btrfs_trans_handle *trans, + 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, +@@ -2365,7 +2358,21 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, + } + } + ++ /* ++ * We need to try and merge add/drops of the same ref since we ++ * can run into issues with relocate dropping the implicit ref ++ * and then it being added back again before the drop can ++ * finish. If we merged anything we need to re-loop so we can ++ * get a good ref. ++ * Or we can get node references of the same type that weren't ++ * merged when created due to bumps in the tree mod seq, and ++ * we need to merge them to prevent adding an inline extent ++ * backref before dropping it (triggering a BUG_ON at ++ * insert_inline_extent_backref()). ++ */ + spin_lock(&locked_ref->lock); ++ btrfs_merge_delayed_refs(trans, fs_info, delayed_refs, ++ locked_ref); + + /* + * locked_ref is the head node, so we have to go one +@@ -3038,7 +3045,7 @@ static int __btrfs_mod_ref(struct btrfs_trans_handle *trans, + 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)) +@@ -3079,15 +3086,14 @@ static int __btrfs_mod_ref(struct btrfs_trans_handle *trans, + 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; + } +@@ -6137,7 +6143,6 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, + 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; +@@ -6146,9 +6151,6 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, + 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; +@@ -6474,7 +6476,7 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans, + 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 */ + } + +@@ -6522,7 +6524,7 @@ 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; +@@ -6545,13 +6547,13 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, + 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; + } +@@ -7333,8 +7335,7 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans, + 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; +@@ -7424,7 +7425,7 @@ int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, + 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; + } + +@@ -7641,7 +7642,7 @@ struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, + ins.objectid, ins.offset, + parent, root_objectid, level, + BTRFS_ADD_DELAYED_EXTENT, +- extent_op, 0); ++ extent_op); + if (ret) + goto out_free_delayed; + } +@@ -8189,7 +8190,7 @@ 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); +diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c +index b823fac91c92..5e314856a58c 100644 +--- a/fs/btrfs/file.c ++++ b/fs/btrfs/file.c +@@ -756,8 +756,16 @@ next_slot: + } + + btrfs_item_key_to_cpu(leaf, &key, path->slots[0]); +- if (key.objectid > ino || +- key.type > BTRFS_EXTENT_DATA_KEY || key.offset >= end) ++ ++ if (key.objectid > ino) ++ break; ++ if (WARN_ON_ONCE(key.objectid < ino) || ++ key.type < BTRFS_EXTENT_DATA_KEY) { ++ ASSERT(del_nr == 0); ++ path->slots[0]++; ++ goto next_slot; ++ } ++ if (key.type > BTRFS_EXTENT_DATA_KEY || key.offset >= end) + break; + + fi = btrfs_item_ptr(leaf, path->slots[0], +@@ -776,8 +784,8 @@ next_slot: + btrfs_file_extent_inline_len(leaf, + path->slots[0], fi); + } else { +- WARN_ON(1); +- extent_end = search_start; ++ /* can't happen */ ++ BUG(); + } + + /* +@@ -847,7 +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; +@@ -925,7 +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); +@@ -1204,7 +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) { +@@ -1231,7 +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; +@@ -1248,7 +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) { +@@ -1868,8 +1876,13 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) + struct btrfs_log_ctx ctx; + int ret = 0; + bool full_sync = 0; +- const u64 len = end - start + 1; ++ u64 len; + ++ /* ++ * The range length can be represented by u64, we have to do the typecasts ++ * to avoid signed overflow if it's [0, LLONG_MAX] eg. from fsync() ++ */ ++ len = (u64)end - (u64)start + 1; + trace_btrfs_sync_file(file, datasync); + + /* +@@ -2057,8 +2070,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) + } + } + if (!full_sync) { +- ret = btrfs_wait_ordered_range(inode, start, +- end - start + 1); ++ ret = btrfs_wait_ordered_range(inode, start, len); + if (ret) { + btrfs_end_transaction(trans, root); + goto out; +diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c +index b54e63038b96..9aabff2102f8 100644 +--- a/fs/btrfs/inode.c ++++ b/fs/btrfs/inode.c +@@ -1294,8 +1294,14 @@ next_slot: + num_bytes = 0; + btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); + +- if (found_key.objectid > ino || +- found_key.type > BTRFS_EXTENT_DATA_KEY || ++ if (found_key.objectid > ino) ++ break; ++ if (WARN_ON_ONCE(found_key.objectid < ino) || ++ found_key.type < BTRFS_EXTENT_DATA_KEY) { ++ path->slots[0]++; ++ goto next_slot; ++ } ++ if (found_key.type > BTRFS_EXTENT_DATA_KEY || + found_key.offset > end) + break; + +@@ -2569,7 +2575,7 @@ 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; +@@ -4184,6 +4190,47 @@ static int truncate_space_check(struct btrfs_trans_handle *trans, + + } + ++static int truncate_inline_extent(struct inode *inode, ++ struct btrfs_path *path, ++ struct btrfs_key *found_key, ++ const u64 item_end, ++ const u64 new_size) ++{ ++ struct extent_buffer *leaf = path->nodes[0]; ++ int slot = path->slots[0]; ++ struct btrfs_file_extent_item *fi; ++ u32 size = (u32)(new_size - found_key->offset); ++ struct btrfs_root *root = BTRFS_I(inode)->root; ++ ++ fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item); ++ ++ if (btrfs_file_extent_compression(leaf, fi) != BTRFS_COMPRESS_NONE) { ++ loff_t offset = new_size; ++ loff_t page_end = ALIGN(offset, PAGE_CACHE_SIZE); ++ ++ /* ++ * Zero out the remaining of the last page of our inline extent, ++ * instead of directly truncating our inline extent here - that ++ * would be much more complex (decompressing all the data, then ++ * compressing the truncated data, which might be bigger than ++ * the size of the inline extent, resize the extent, etc). ++ * We release the path because to get the page we might need to ++ * read the extent item from disk (data not in the page cache). ++ */ ++ btrfs_release_path(path); ++ return btrfs_truncate_page(inode, offset, page_end - offset, 0); ++ } ++ ++ btrfs_set_file_extent_ram_bytes(leaf, fi, size); ++ size = btrfs_file_extent_calc_inline_size(size); ++ btrfs_truncate_item(root, path, size, 1); ++ ++ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state)) ++ inode_sub_bytes(inode, item_end + 1 - new_size); ++ ++ return 0; ++} ++ + /* + * this can truncate away extent items, csum items and directory items. + * It starts at a high offset and removes keys until it can't find +@@ -4378,27 +4425,40 @@ search_again: + * special encodings + */ + if (!del_item && +- btrfs_file_extent_compression(leaf, fi) == 0 && + btrfs_file_extent_encryption(leaf, fi) == 0 && + btrfs_file_extent_other_encoding(leaf, fi) == 0) { +- u32 size = new_size - found_key.offset; +- +- if (test_bit(BTRFS_ROOT_REF_COWS, &root->state)) +- inode_sub_bytes(inode, item_end + 1 - +- new_size); + + /* +- * update the ram bytes to properly reflect +- * the new size of our item ++ * Need to release path in order to truncate a ++ * compressed extent. So delete any accumulated ++ * extent items so far. + */ +- btrfs_set_file_extent_ram_bytes(leaf, fi, size); +- size = +- btrfs_file_extent_calc_inline_size(size); +- btrfs_truncate_item(root, path, size, 1); ++ if (btrfs_file_extent_compression(leaf, fi) != ++ BTRFS_COMPRESS_NONE && pending_del_nr) { ++ err = btrfs_del_items(trans, root, path, ++ pending_del_slot, ++ pending_del_nr); ++ if (err) { ++ btrfs_abort_transaction(trans, ++ root, ++ err); ++ goto error; ++ } ++ pending_del_nr = 0; ++ } ++ ++ err = truncate_inline_extent(inode, path, ++ &found_key, ++ item_end, ++ new_size); ++ if (err) { ++ btrfs_abort_transaction(trans, ++ root, err); ++ goto error; ++ } + } else if (test_bit(BTRFS_ROOT_REF_COWS, + &root->state)) { +- inode_sub_bytes(inode, item_end + 1 - +- found_key.offset); ++ inode_sub_bytes(inode, item_end + 1 - new_size); + } + } + delete: +@@ -4428,7 +4488,7 @@ 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, +diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c +index 641d3dc4f31e..be4e53c61dd9 100644 +--- a/fs/btrfs/ioctl.c ++++ b/fs/btrfs/ioctl.c +@@ -3195,41 +3195,6 @@ 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, +@@ -3320,6 +3285,150 @@ static void clone_update_extent_map(struct inode *inode, + &BTRFS_I(inode)->runtime_flags); + } + ++/* ++ * Make sure we do not end up inserting an inline extent into a file that has ++ * already other (non-inline) extents. If a file has an inline extent it can ++ * not have any other extents and the (single) inline extent must start at the ++ * file offset 0. Failing to respect these rules will lead to file corruption, ++ * resulting in EIO errors on read/write operations, hitting BUG_ON's in mm, etc ++ * ++ * We can have extents that have been already written to disk or we can have ++ * dirty ranges still in delalloc, in which case the extent maps and items are ++ * created only when we run delalloc, and the delalloc ranges might fall outside ++ * the range we are currently locking in the inode's io tree. So we check the ++ * inode's i_size because of that (i_size updates are done while holding the ++ * i_mutex, which we are holding here). ++ * We also check to see if the inode has a size not greater than "datal" but has ++ * extents beyond it, due to an fallocate with FALLOC_FL_KEEP_SIZE (and we are ++ * protected against such concurrent fallocate calls by the i_mutex). ++ * ++ * If the file has no extents but a size greater than datal, do not allow the ++ * copy because we would need turn the inline extent into a non-inline one (even ++ * with NO_HOLES enabled). If we find our destination inode only has one inline ++ * extent, just overwrite it with the source inline extent if its size is less ++ * than the source extent's size, or we could copy the source inline extent's ++ * data into the destination inode's inline extent if the later is greater then ++ * the former. ++ */ ++static int clone_copy_inline_extent(struct inode *src, ++ struct inode *dst, ++ struct btrfs_trans_handle *trans, ++ struct btrfs_path *path, ++ struct btrfs_key *new_key, ++ const u64 drop_start, ++ const u64 datal, ++ const u64 skip, ++ const u64 size, ++ char *inline_data) ++{ ++ struct btrfs_root *root = BTRFS_I(dst)->root; ++ const u64 aligned_end = ALIGN(new_key->offset + datal, ++ root->sectorsize); ++ int ret; ++ struct btrfs_key key; ++ ++ if (new_key->offset > 0) ++ return -EOPNOTSUPP; ++ ++ key.objectid = btrfs_ino(dst); ++ key.type = BTRFS_EXTENT_DATA_KEY; ++ key.offset = 0; ++ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); ++ if (ret < 0) { ++ return ret; ++ } else if (ret > 0) { ++ if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) { ++ ret = btrfs_next_leaf(root, path); ++ if (ret < 0) ++ return ret; ++ else if (ret > 0) ++ goto copy_inline_extent; ++ } ++ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]); ++ if (key.objectid == btrfs_ino(dst) && ++ key.type == BTRFS_EXTENT_DATA_KEY) { ++ ASSERT(key.offset > 0); ++ return -EOPNOTSUPP; ++ } ++ } else if (i_size_read(dst) <= datal) { ++ struct btrfs_file_extent_item *ei; ++ u64 ext_len; ++ ++ /* ++ * If the file size is <= datal, make sure there are no other ++ * extents following (can happen do to an fallocate call with ++ * the flag FALLOC_FL_KEEP_SIZE). ++ */ ++ ei = btrfs_item_ptr(path->nodes[0], path->slots[0], ++ struct btrfs_file_extent_item); ++ /* ++ * If it's an inline extent, it can not have other extents ++ * following it. ++ */ ++ if (btrfs_file_extent_type(path->nodes[0], ei) == ++ BTRFS_FILE_EXTENT_INLINE) ++ goto copy_inline_extent; ++ ++ ext_len = btrfs_file_extent_num_bytes(path->nodes[0], ei); ++ if (ext_len > aligned_end) ++ return -EOPNOTSUPP; ++ ++ ret = btrfs_next_item(root, path); ++ if (ret < 0) { ++ return ret; ++ } else if (ret == 0) { ++ btrfs_item_key_to_cpu(path->nodes[0], &key, ++ path->slots[0]); ++ if (key.objectid == btrfs_ino(dst) && ++ key.type == BTRFS_EXTENT_DATA_KEY) ++ return -EOPNOTSUPP; ++ } ++ } ++ ++copy_inline_extent: ++ /* ++ * We have no extent items, or we have an extent at offset 0 which may ++ * or may not be inlined. All these cases are dealt the same way. ++ */ ++ if (i_size_read(dst) > datal) { ++ /* ++ * If the destination inode has an inline extent... ++ * This would require copying the data from the source inline ++ * extent into the beginning of the destination's inline extent. ++ * But this is really complex, both extents can be compressed ++ * or just one of them, which would require decompressing and ++ * re-compressing data (which could increase the new compressed ++ * size, not allowing the compressed data to fit anymore in an ++ * inline extent). ++ * So just don't support this case for now (it should be rare, ++ * we are not really saving space when cloning inline extents). ++ */ ++ return -EOPNOTSUPP; ++ } ++ ++ btrfs_release_path(path); ++ ret = btrfs_drop_extents(trans, root, dst, drop_start, aligned_end, 1); ++ if (ret) ++ return ret; ++ ret = btrfs_insert_empty_item(trans, root, path, new_key, size); ++ if (ret) ++ return ret; ++ ++ if (skip) { ++ const u32 start = btrfs_file_extent_calc_inline_size(0); ++ ++ memmove(inline_data + start, inline_data + start + skip, datal); ++ } ++ ++ write_extent_buffer(path->nodes[0], inline_data, ++ btrfs_item_ptr_offset(path->nodes[0], ++ path->slots[0]), ++ size); ++ inode_add_bytes(dst, datal); ++ ++ return 0; ++} ++ + /** + * btrfs_clone() - clone a range from inode file to another + * +@@ -3344,9 +3453,7 @@ static int btrfs_clone(struct inode *src, struct inode *inode, + 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; +@@ -3392,7 +3499,6 @@ static int btrfs_clone(struct inode *src, struct inode *inode, + + 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) +@@ -3544,35 +3650,13 @@ 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, +@@ -3586,21 +3670,6 @@ process_slot: + } else if (type == BTRFS_FILE_EXTENT_INLINE) { + u64 skip = 0; + u64 trim = 0; +- u64 aligned_end = 0; +- +- /* +- * Don't copy an inline extent into an offset +- * greater than zero. Having an inline extent +- * at such an offset results in chaos as btrfs +- * isn't prepared for such cases. Just skip +- * this case for the same reasons as commented +- * at btrfs_ioctl_clone(). +- */ +- if (last_dest_end > 0) { +- ret = -EOPNOTSUPP; +- btrfs_end_transaction(trans, root); +- goto out; +- } + + if (off > key.offset) { + skip = off - key.offset; +@@ -3618,42 +3687,22 @@ process_slot: + size -= skip + trim; + datal -= skip + trim; + +- aligned_end = ALIGN(new_key.offset + datal, +- root->sectorsize); +- ret = btrfs_drop_extents(trans, root, inode, +- drop_start, +- aligned_end, +- 1); ++ ret = clone_copy_inline_extent(src, inode, ++ trans, path, ++ &new_key, ++ drop_start, ++ datal, ++ skip, size, buf); + if (ret) { + if (ret != -EOPNOTSUPP) + btrfs_abort_transaction(trans, +- root, ret); +- btrfs_end_transaction(trans, root); +- goto out; +- } +- +- ret = btrfs_insert_empty_item(trans, root, path, +- &new_key, size); +- if (ret) { +- btrfs_abort_transaction(trans, root, +- ret); ++ root, ++ ret); + btrfs_end_transaction(trans, root); + goto out; + } +- +- if (skip) { +- u32 start = +- btrfs_file_extent_calc_inline_size(0); +- memmove(buf+start, buf+start+skip, +- datal); +- } +- + leaf = path->nodes[0]; + slot = path->slots[0]; +- write_extent_buffer(leaf, buf, +- btrfs_item_ptr_offset(leaf, slot), +- size); +- inode_add_bytes(inode, datal); + } + + /* If we have an implicit hole (NO_HOLES feature). */ +diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c +index 88cbb5995667..3a828a33cd67 100644 +--- a/fs/btrfs/relocation.c ++++ b/fs/btrfs/relocation.c +@@ -1716,7 +1716,7 @@ int replace_file_extents(struct btrfs_trans_handle *trans, + 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_trans_handle *trans, + + 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); +@@ -2746,7 +2744,7 @@ static int do_relocation(struct btrfs_trans_handle *trans, + 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); +diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c +index aa72bfd28f7d..890933b61267 100644 +--- a/fs/btrfs/send.c ++++ b/fs/btrfs/send.c +@@ -2351,8 +2351,14 @@ static int send_subvol_begin(struct send_ctx *sctx) + } + + TLV_PUT_STRING(sctx, BTRFS_SEND_A_PATH, name, namelen); +- TLV_PUT_UUID(sctx, BTRFS_SEND_A_UUID, +- sctx->send_root->root_item.uuid); ++ ++ if (!btrfs_is_empty_uuid(sctx->send_root->root_item.received_uuid)) ++ TLV_PUT_UUID(sctx, BTRFS_SEND_A_UUID, ++ sctx->send_root->root_item.received_uuid); ++ else ++ TLV_PUT_UUID(sctx, BTRFS_SEND_A_UUID, ++ sctx->send_root->root_item.uuid); ++ + TLV_PUT_U64(sctx, BTRFS_SEND_A_CTRANSID, + le64_to_cpu(sctx->send_root->root_item.ctransid)); + if (parent_root) { +diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c +index 9c45431e69ab..7639695075dd 100644 +--- a/fs/btrfs/tree-log.c ++++ b/fs/btrfs/tree-log.c +@@ -700,7 +700,7 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans, + 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 { +diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c +index 6f518c90e1c1..1fcd7b6e7564 100644 +--- a/fs/btrfs/xattr.c ++++ b/fs/btrfs/xattr.c +@@ -313,8 +313,10 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size) + /* check to make sure this item is what we want */ + if (found_key.objectid != key.objectid) + break; +- if (found_key.type != BTRFS_XATTR_ITEM_KEY) ++ if (found_key.type > BTRFS_XATTR_ITEM_KEY) + break; ++ if (found_key.type < BTRFS_XATTR_ITEM_KEY) ++ goto next; + + di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item); + if (verify_dir_item(root, leaf, di)) +diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c +index 6aa07af67603..df45a818c570 100644 +--- a/fs/ceph/mds_client.c ++++ b/fs/ceph/mds_client.c +@@ -1935,7 +1935,7 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc, + + len = sizeof(*head) + + pathlen1 + pathlen2 + 2*(1 + sizeof(u32) + sizeof(u64)) + +- sizeof(struct timespec); ++ sizeof(struct ceph_timespec); + + /* calculate (max) length for cap releases */ + len += sizeof(struct ceph_mds_request_release) * +diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c +index c711be8d6a3c..9c8d23316da1 100644 +--- a/fs/debugfs/inode.c ++++ b/fs/debugfs/inode.c +@@ -271,8 +271,12 @@ static struct dentry *start_creating(const char *name, struct dentry *parent) + dput(dentry); + dentry = ERR_PTR(-EEXIST); + } +- if (IS_ERR(dentry)) ++ ++ if (IS_ERR(dentry)) { + mutex_unlock(&d_inode(parent)->i_mutex); ++ simple_release_fs(&debugfs_mount, &debugfs_mount_count); ++ } ++ + return dentry; + } + +diff --git a/fs/ext4/crypto.c b/fs/ext4/crypto.c +index 45731558138c..54a5169327a3 100644 +--- a/fs/ext4/crypto.c ++++ b/fs/ext4/crypto.c +@@ -296,7 +296,6 @@ static int ext4_page_crypto(struct ext4_crypto_ctx *ctx, + else + res = crypto_ablkcipher_encrypt(req); + if (res == -EINPROGRESS || res == -EBUSY) { +- BUG_ON(req->base.data != &ecr); + wait_for_completion(&ecr.completion); + res = ecr.res; + } +diff --git a/fs/ext4/crypto_fname.c b/fs/ext4/crypto_fname.c +index 7dc4eb55913c..f9d53c2bd756 100644 +--- a/fs/ext4/crypto_fname.c ++++ b/fs/ext4/crypto_fname.c +@@ -121,7 +121,6 @@ static int ext4_fname_encrypt(struct inode *inode, + ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, ciphertext_len, iv); + res = crypto_ablkcipher_encrypt(req); + if (res == -EINPROGRESS || res == -EBUSY) { +- BUG_ON(req->base.data != &ecr); + wait_for_completion(&ecr.completion); + res = ecr.res; + } +@@ -183,7 +182,6 @@ static int ext4_fname_decrypt(struct inode *inode, + ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, iname->len, iv); + res = crypto_ablkcipher_decrypt(req); + if (res == -EINPROGRESS || res == -EBUSY) { +- BUG_ON(req->base.data != &ecr); + wait_for_completion(&ecr.completion); + res = ecr.res; + } +diff --git a/fs/ext4/crypto_key.c b/fs/ext4/crypto_key.c +index 442d24e8efc0..9bad1132ac8f 100644 +--- a/fs/ext4/crypto_key.c ++++ b/fs/ext4/crypto_key.c +@@ -71,7 +71,6 @@ static int ext4_derive_key_aes(char deriving_key[EXT4_AES_128_ECB_KEY_SIZE], + EXT4_AES_256_XTS_KEY_SIZE, NULL); + res = crypto_ablkcipher_encrypt(req); + if (res == -EINPROGRESS || res == -EBUSY) { +- BUG_ON(req->base.data != &ecr); + wait_for_completion(&ecr.completion); + res = ecr.res; + } +@@ -208,7 +207,12 @@ retry: + goto out; + } + crypt_info->ci_keyring_key = keyring_key; +- BUG_ON(keyring_key->type != &key_type_logon); ++ if (keyring_key->type != &key_type_logon) { ++ printk_once(KERN_WARNING ++ "ext4: key type must be logon\n"); ++ res = -ENOKEY; ++ goto out; ++ } + ukp = ((struct user_key_payload *)keyring_key->payload.data); + if (ukp->datalen != sizeof(struct ext4_encryption_key)) { + res = -EINVAL; +@@ -217,7 +221,13 @@ retry: + master_key = (struct ext4_encryption_key *)ukp->data; + BUILD_BUG_ON(EXT4_AES_128_ECB_KEY_SIZE != + EXT4_KEY_DERIVATION_NONCE_SIZE); +- BUG_ON(master_key->size != EXT4_AES_256_XTS_KEY_SIZE); ++ if (master_key->size != EXT4_AES_256_XTS_KEY_SIZE) { ++ printk_once(KERN_WARNING ++ "ext4: key size incorrect: %d\n", ++ master_key->size); ++ res = -ENOKEY; ++ goto out; ++ } + res = ext4_derive_key_aes(ctx.nonce, master_key->raw, + raw_key); + got_key: +diff --git a/fs/ext4/crypto_policy.c b/fs/ext4/crypto_policy.c +index 02c4e5df7afb..f92fa93e67f1 100644 +--- a/fs/ext4/crypto_policy.c ++++ b/fs/ext4/crypto_policy.c +@@ -137,7 +137,8 @@ int ext4_is_child_context_consistent_with_parent(struct inode *parent, + + if ((parent == NULL) || (child == NULL)) { + pr_err("parent %p child %p\n", parent, child); +- BUG_ON(1); ++ WARN_ON(1); /* Should never happen */ ++ return 0; + } + /* no restrictions if the parent directory is not encrypted */ + if (!ext4_encrypted_inode(parent)) +diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c +index d41843181818..e770c1ee4613 100644 +--- a/fs/ext4/ext4_jbd2.c ++++ b/fs/ext4/ext4_jbd2.c +@@ -88,13 +88,13 @@ int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) + return 0; + } + ++ err = handle->h_err; + if (!handle->h_transaction) { +- err = jbd2_journal_stop(handle); +- return handle->h_err ? handle->h_err : err; ++ rc = jbd2_journal_stop(handle); ++ return err ? err : rc; + } + + sb = handle->h_transaction->t_journal->j_private; +- err = handle->h_err; + rc = jbd2_journal_stop(handle); + + if (!err) +diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c +index 5602450f03f6..89e96f99dae7 100644 +--- a/fs/ext4/page-io.c ++++ b/fs/ext4/page-io.c +@@ -425,6 +425,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io, + struct buffer_head *bh, *head; + int ret = 0; + int nr_submitted = 0; ++ int nr_to_submit = 0; + + blocksize = 1 << inode->i_blkbits; + +@@ -477,11 +478,13 @@ int ext4_bio_write_page(struct ext4_io_submit *io, + unmap_underlying_metadata(bh->b_bdev, bh->b_blocknr); + } + set_buffer_async_write(bh); ++ nr_to_submit++; + } while ((bh = bh->b_this_page) != head); + + bh = head = page_buffers(page); + +- if (ext4_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { ++ if (ext4_encrypted_inode(inode) && S_ISREG(inode->i_mode) && ++ nr_to_submit) { + data_page = ext4_encrypt(inode, page); + if (IS_ERR(data_page)) { + ret = PTR_ERR(data_page); +diff --git a/fs/ext4/super.c b/fs/ext4/super.c +index a5e8c744e962..bc24d1b44b8f 100644 +--- a/fs/ext4/super.c ++++ b/fs/ext4/super.c +@@ -397,9 +397,13 @@ static void ext4_handle_error(struct super_block *sb) + smp_wmb(); + sb->s_flags |= MS_RDONLY; + } +- if (test_opt(sb, ERRORS_PANIC)) ++ if (test_opt(sb, ERRORS_PANIC)) { ++ if (EXT4_SB(sb)->s_journal && ++ !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) ++ return; + panic("EXT4-fs (device %s): panic forced after error\n", + sb->s_id); ++ } + } + + #define ext4_error_ratelimit(sb) \ +@@ -588,8 +592,12 @@ void __ext4_abort(struct super_block *sb, const char *function, + jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); + save_error_info(sb, function, line); + } +- if (test_opt(sb, ERRORS_PANIC)) ++ if (test_opt(sb, ERRORS_PANIC)) { ++ if (EXT4_SB(sb)->s_journal && ++ !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) ++ return; + panic("EXT4-fs panic from previous error\n"); ++ } + } + + void __ext4_msg(struct super_block *sb, +diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c +index 2721513adb1f..fd2787a39b87 100644 +--- a/fs/jbd2/journal.c ++++ b/fs/jbd2/journal.c +@@ -2071,8 +2071,12 @@ static void __journal_abort_soft (journal_t *journal, int errno) + + __jbd2_journal_abort_hard(journal); + +- if (errno) ++ if (errno) { + jbd2_journal_update_sb_errno(journal); ++ write_lock(&journal->j_state_lock); ++ journal->j_flags |= JBD2_REC_ERR; ++ write_unlock(&journal->j_state_lock); ++ } + } + + /** +diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c +index 4afbe13321cb..f27cc76ed5e6 100644 +--- a/fs/nfs/inode.c ++++ b/fs/nfs/inode.c +@@ -1816,7 +1816,11 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) + if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) + nfsi->attr_gencount = fattr->gencount; + } +- invalid &= ~NFS_INO_INVALID_ATTR; ++ ++ /* Don't declare attrcache up to date if there were no attrs! */ ++ if (fattr->valid != 0) ++ invalid &= ~NFS_INO_INVALID_ATTR; ++ + /* Don't invalidate the data if we were to blame */ + if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) + || S_ISLNK(inode->i_mode))) +diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c +index 3aa6a9ba5113..199648d5fcc5 100644 +--- a/fs/nfs/nfs4client.c ++++ b/fs/nfs/nfs4client.c +@@ -33,7 +33,7 @@ static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) + return ret; + idr_preload(GFP_KERNEL); + spin_lock(&nn->nfs_client_lock); +- ret = idr_alloc(&nn->cb_ident_idr, clp, 0, 0, GFP_NOWAIT); ++ ret = idr_alloc(&nn->cb_ident_idr, clp, 1, 0, GFP_NOWAIT); + if (ret >= 0) + clp->cl_cb_ident = ret; + spin_unlock(&nn->nfs_client_lock); +diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c +index 75189cd34583..5ea13286e2b0 100644 +--- a/fs/nfsd/nfs4state.c ++++ b/fs/nfsd/nfs4state.c +@@ -765,16 +765,68 @@ void nfs4_unhash_stid(struct nfs4_stid *s) + s->sc_type = 0; + } + +-static void ++/** ++ * nfs4_get_existing_delegation - Discover if this delegation already exists ++ * @clp: a pointer to the nfs4_client we're granting a delegation to ++ * @fp: a pointer to the nfs4_file we're granting a delegation on ++ * ++ * Return: ++ * On success: NULL if an existing delegation was not found. ++ * ++ * On error: -EAGAIN if one was previously granted to this nfs4_client ++ * for this nfs4_file. ++ * ++ */ ++ ++static int ++nfs4_get_existing_delegation(struct nfs4_client *clp, struct nfs4_file *fp) ++{ ++ struct nfs4_delegation *searchdp = NULL; ++ struct nfs4_client *searchclp = NULL; ++ ++ lockdep_assert_held(&state_lock); ++ lockdep_assert_held(&fp->fi_lock); ++ ++ list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { ++ searchclp = searchdp->dl_stid.sc_client; ++ if (clp == searchclp) { ++ return -EAGAIN; ++ } ++ } ++ return 0; ++} ++ ++/** ++ * hash_delegation_locked - Add a delegation to the appropriate lists ++ * @dp: a pointer to the nfs4_delegation we are adding. ++ * @fp: a pointer to the nfs4_file we're granting a delegation on ++ * ++ * Return: ++ * On success: NULL if the delegation was successfully hashed. ++ * ++ * On error: -EAGAIN if one was previously granted to this ++ * nfs4_client for this nfs4_file. Delegation is not hashed. ++ * ++ */ ++ ++static int + hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) + { ++ int status; ++ struct nfs4_client *clp = dp->dl_stid.sc_client; ++ + lockdep_assert_held(&state_lock); + lockdep_assert_held(&fp->fi_lock); + ++ status = nfs4_get_existing_delegation(clp, fp); ++ if (status) ++ return status; ++ ++fp->fi_delegees; + atomic_inc(&dp->dl_stid.sc_count); + dp->dl_stid.sc_type = NFS4_DELEG_STID; + list_add(&dp->dl_perfile, &fp->fi_delegations); +- list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); ++ list_add(&dp->dl_perclnt, &clp->cl_delegations); ++ return 0; + } + + static bool +@@ -3351,6 +3403,7 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, + stp->st_access_bmap = 0; + stp->st_deny_bmap = 0; + stp->st_openstp = NULL; ++ init_rwsem(&stp->st_rwsem); + spin_lock(&oo->oo_owner.so_client->cl_lock); + list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); + spin_lock(&fp->fi_lock); +@@ -3939,6 +3992,18 @@ static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) + return fl; + } + ++/** ++ * nfs4_setlease - Obtain a delegation by requesting lease from vfs layer ++ * @dp: a pointer to the nfs4_delegation we're adding. ++ * ++ * Return: ++ * On success: Return code will be 0 on success. ++ * ++ * On error: -EAGAIN if there was an existing delegation. ++ * nonzero if there is an error in other cases. ++ * ++ */ ++ + static int nfs4_setlease(struct nfs4_delegation *dp) + { + struct nfs4_file *fp = dp->dl_stid.sc_file; +@@ -3970,16 +4035,19 @@ static int nfs4_setlease(struct nfs4_delegation *dp) + goto out_unlock; + /* Race breaker */ + if (fp->fi_deleg_file) { +- status = 0; +- ++fp->fi_delegees; +- hash_delegation_locked(dp, fp); ++ status = hash_delegation_locked(dp, fp); + goto out_unlock; + } + fp->fi_deleg_file = filp; +- fp->fi_delegees = 1; +- hash_delegation_locked(dp, fp); ++ fp->fi_delegees = 0; ++ status = hash_delegation_locked(dp, fp); + spin_unlock(&fp->fi_lock); + spin_unlock(&state_lock); ++ if (status) { ++ /* Should never happen, this is a new fi_deleg_file */ ++ WARN_ON_ONCE(1); ++ goto out_fput; ++ } + return 0; + out_unlock: + spin_unlock(&fp->fi_lock); +@@ -3999,6 +4067,15 @@ nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, + if (fp->fi_had_conflict) + return ERR_PTR(-EAGAIN); + ++ spin_lock(&state_lock); ++ spin_lock(&fp->fi_lock); ++ status = nfs4_get_existing_delegation(clp, fp); ++ spin_unlock(&fp->fi_lock); ++ spin_unlock(&state_lock); ++ ++ if (status) ++ return ERR_PTR(status); ++ + dp = alloc_init_deleg(clp, fh, odstate); + if (!dp) + return ERR_PTR(-ENOMEM); +@@ -4017,9 +4094,7 @@ nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, + status = -EAGAIN; + goto out_unlock; + } +- ++fp->fi_delegees; +- hash_delegation_locked(dp, fp); +- status = 0; ++ status = hash_delegation_locked(dp, fp); + out_unlock: + spin_unlock(&fp->fi_lock); + spin_unlock(&state_lock); +@@ -4180,15 +4255,20 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf + */ + if (stp) { + /* Stateid was found, this is an OPEN upgrade */ ++ down_read(&stp->st_rwsem); + status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); +- if (status) ++ if (status) { ++ up_read(&stp->st_rwsem); + goto out; ++ } + } else { + stp = open->op_stp; + open->op_stp = NULL; + init_open_stateid(stp, fp, open); ++ down_read(&stp->st_rwsem); + status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); + if (status) { ++ up_read(&stp->st_rwsem); + release_open_stateid(stp); + goto out; + } +@@ -4200,6 +4280,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf + } + update_stateid(&stp->st_stid.sc_stateid); + memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); ++ up_read(&stp->st_rwsem); + + if (nfsd4_has_session(&resp->cstate)) { + if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { +@@ -4814,10 +4895,13 @@ static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_ + * revoked delegations are kept only for free_stateid. + */ + return nfserr_bad_stateid; ++ down_write(&stp->st_rwsem); + status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); +- if (status) +- return status; +- return nfs4_check_fh(current_fh, &stp->st_stid); ++ if (status == nfs_ok) ++ status = nfs4_check_fh(current_fh, &stp->st_stid); ++ if (status != nfs_ok) ++ up_write(&stp->st_rwsem); ++ return status; + } + + /* +@@ -4864,6 +4948,7 @@ static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cs + return status; + oo = openowner(stp->st_stateowner); + if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { ++ up_write(&stp->st_rwsem); + nfs4_put_stid(&stp->st_stid); + return nfserr_bad_stateid; + } +@@ -4894,11 +4979,14 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + goto out; + oo = openowner(stp->st_stateowner); + status = nfserr_bad_stateid; +- if (oo->oo_flags & NFS4_OO_CONFIRMED) ++ if (oo->oo_flags & NFS4_OO_CONFIRMED) { ++ up_write(&stp->st_rwsem); + goto put_stateid; ++ } + oo->oo_flags |= NFS4_OO_CONFIRMED; + update_stateid(&stp->st_stid.sc_stateid); + memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); ++ up_write(&stp->st_rwsem); + dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", + __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); + +@@ -4977,6 +5065,7 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp, + memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); + status = nfs_ok; + put_stateid: ++ up_write(&stp->st_rwsem); + nfs4_put_stid(&stp->st_stid); + out: + nfsd4_bump_seqid(cstate, status); +@@ -5030,6 +5119,7 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + goto out; + update_stateid(&stp->st_stid.sc_stateid); + memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); ++ up_write(&stp->st_rwsem); + + nfsd4_close_open_stateid(stp); + +@@ -5260,6 +5350,7 @@ init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, + stp->st_access_bmap = 0; + stp->st_deny_bmap = open_stp->st_deny_bmap; + stp->st_openstp = open_stp; ++ init_rwsem(&stp->st_rwsem); + list_add(&stp->st_locks, &open_stp->st_locks); + list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); + spin_lock(&fp->fi_lock); +@@ -5428,6 +5519,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + &open_stp, nn); + if (status) + goto out; ++ up_write(&open_stp->st_rwsem); + open_sop = openowner(open_stp->st_stateowner); + status = nfserr_bad_stateid; + if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, +@@ -5435,6 +5527,8 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + goto out; + status = lookup_or_create_lock_state(cstate, open_stp, lock, + &lock_stp, &new); ++ if (status == nfs_ok) ++ down_write(&lock_stp->st_rwsem); + } else { + status = nfs4_preprocess_seqid_op(cstate, + lock->lk_old_lock_seqid, +@@ -5540,6 +5634,8 @@ out: + seqid_mutating_err(ntohl(status))) + lock_sop->lo_owner.so_seqid++; + ++ up_write(&lock_stp->st_rwsem); ++ + /* + * If this is a new, never-before-used stateid, and we are + * returning an error, then just go ahead and release it. +@@ -5710,6 +5806,7 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + fput: + fput(filp); + put_stateid: ++ up_write(&stp->st_rwsem); + nfs4_put_stid(&stp->st_stid); + out: + nfsd4_bump_seqid(cstate, status); +diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h +index 4874ce515fc1..fada614d6db1 100644 +--- a/fs/nfsd/state.h ++++ b/fs/nfsd/state.h +@@ -534,15 +534,16 @@ struct nfs4_file { + * Better suggestions welcome. + */ + struct nfs4_ol_stateid { +- struct nfs4_stid st_stid; /* must be first field */ +- struct list_head st_perfile; +- struct list_head st_perstateowner; +- struct list_head st_locks; +- struct nfs4_stateowner * st_stateowner; +- struct nfs4_clnt_odstate * st_clnt_odstate; +- unsigned char st_access_bmap; +- unsigned char st_deny_bmap; +- struct nfs4_ol_stateid * st_openstp; ++ struct nfs4_stid st_stid; ++ struct list_head st_perfile; ++ struct list_head st_perstateowner; ++ struct list_head st_locks; ++ struct nfs4_stateowner *st_stateowner; ++ struct nfs4_clnt_odstate *st_clnt_odstate; ++ unsigned char st_access_bmap; ++ unsigned char st_deny_bmap; ++ struct nfs4_ol_stateid *st_openstp; ++ struct rw_semaphore st_rwsem; + }; + + static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s) +diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c +index 6e6abb93fda5..ff040125c190 100644 +--- a/fs/ocfs2/namei.c ++++ b/fs/ocfs2/namei.c +@@ -365,6 +365,8 @@ static int ocfs2_mknod(struct inode *dir, + mlog_errno(status); + goto leave; + } ++ /* update inode->i_mode after mask with "umask". */ ++ inode->i_mode = mode; + + handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, + S_ISDIR(mode), +diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h +index 82806c60aa42..e4b464983322 100644 +--- a/include/linux/ipv6.h ++++ b/include/linux/ipv6.h +@@ -224,7 +224,7 @@ struct ipv6_pinfo { + struct ipv6_ac_socklist *ipv6_ac_list; + struct ipv6_fl_socklist __rcu *ipv6_fl_list; + +- struct ipv6_txoptions *opt; ++ struct ipv6_txoptions __rcu *opt; + struct sk_buff *pktoptions; + struct sk_buff *rxpmtu; + struct inet6_cork cork; +diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h +index eb1cebed3f36..c90c9b70e568 100644 +--- a/include/linux/jbd2.h ++++ b/include/linux/jbd2.h +@@ -1007,6 +1007,7 @@ struct journal_s + #define JBD2_ABORT_ON_SYNCDATA_ERR 0x040 /* Abort the journal on file + * data write error in ordered + * mode */ ++#define JBD2_REC_ERR 0x080 /* The errno in the sb has been recorded */ + + /* + * Function declarations for the journaling transaction and buffer +diff --git a/include/net/af_unix.h b/include/net/af_unix.h +index cb1b9bbda332..49c7683e1096 100644 +--- a/include/net/af_unix.h ++++ b/include/net/af_unix.h +@@ -62,6 +62,7 @@ struct unix_sock { + #define UNIX_GC_CANDIDATE 0 + #define UNIX_GC_MAYBE_CYCLE 1 + struct socket_wq peer_wq; ++ wait_queue_t peer_wake; + }; + + static inline struct unix_sock *unix_sk(struct sock *sk) +diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h +index 3b76849c190f..75a888c254e4 100644 +--- a/include/net/ip6_fib.h ++++ b/include/net/ip6_fib.h +@@ -165,7 +165,8 @@ static inline void rt6_update_expires(struct rt6_info *rt0, int timeout) + + static inline u32 rt6_get_cookie(const struct rt6_info *rt) + { +- if (rt->rt6i_flags & RTF_PCPU || unlikely(rt->dst.flags & DST_NOCACHE)) ++ if (rt->rt6i_flags & RTF_PCPU || ++ (unlikely(rt->dst.flags & DST_NOCACHE) && rt->dst.from)) + rt = (struct rt6_info *)(rt->dst.from); + + return rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; +diff --git a/include/net/ip6_tunnel.h b/include/net/ip6_tunnel.h +index b8529aa1dae7..b0f7445c0fdc 100644 +--- a/include/net/ip6_tunnel.h ++++ b/include/net/ip6_tunnel.h +@@ -83,11 +83,12 @@ static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb, + err = ip6_local_out_sk(sk, skb); + + if (net_xmit_eval(err) == 0) { +- struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); ++ struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats); + u64_stats_update_begin(&tstats->syncp); + tstats->tx_bytes += pkt_len; + tstats->tx_packets++; + u64_stats_update_end(&tstats->syncp); ++ put_cpu_ptr(tstats); + } else { + stats->tx_errors++; + stats->tx_aborted_errors++; +diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h +index d8214cb88bbc..9c2897e56ee1 100644 +--- a/include/net/ip_tunnels.h ++++ b/include/net/ip_tunnels.h +@@ -207,12 +207,13 @@ static inline void iptunnel_xmit_stats(int err, + struct pcpu_sw_netstats __percpu *stats) + { + if (err > 0) { +- struct pcpu_sw_netstats *tstats = this_cpu_ptr(stats); ++ struct pcpu_sw_netstats *tstats = get_cpu_ptr(stats); + + u64_stats_update_begin(&tstats->syncp); + tstats->tx_bytes += err; + tstats->tx_packets++; + u64_stats_update_end(&tstats->syncp); ++ put_cpu_ptr(tstats); + } else if (err < 0) { + err_stats->tx_errors++; + err_stats->tx_aborted_errors++; +diff --git a/include/net/ipv6.h b/include/net/ipv6.h +index 82dbdb092a5d..177a89689095 100644 +--- a/include/net/ipv6.h ++++ b/include/net/ipv6.h +@@ -205,6 +205,7 @@ extern rwlock_t ip6_ra_lock; + */ + + struct ipv6_txoptions { ++ atomic_t refcnt; + /* Length of this structure */ + int tot_len; + +@@ -217,7 +218,7 @@ struct ipv6_txoptions { + struct ipv6_opt_hdr *dst0opt; + struct ipv6_rt_hdr *srcrt; /* Routing Header */ + struct ipv6_opt_hdr *dst1opt; +- ++ struct rcu_head rcu; + /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ + }; + +@@ -252,6 +253,24 @@ struct ipv6_fl_socklist { + struct rcu_head rcu; + }; + ++static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np) ++{ ++ struct ipv6_txoptions *opt; ++ ++ rcu_read_lock(); ++ opt = rcu_dereference(np->opt); ++ if (opt && !atomic_inc_not_zero(&opt->refcnt)) ++ opt = NULL; ++ rcu_read_unlock(); ++ return opt; ++} ++ ++static inline void txopt_put(struct ipv6_txoptions *opt) ++{ ++ if (opt && atomic_dec_and_test(&opt->refcnt)) ++ kfree_rcu(opt, rcu); ++} ++ + struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); + struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, + struct ip6_flowlabel *fl, +@@ -490,6 +509,7 @@ struct ip6_create_arg { + u32 user; + const struct in6_addr *src; + const struct in6_addr *dst; ++ int iif; + u8 ecn; + }; + +diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h +index 2738f6f87908..49dda3835061 100644 +--- a/include/net/sch_generic.h ++++ b/include/net/sch_generic.h +@@ -61,6 +61,9 @@ struct Qdisc { + */ + #define TCQ_F_WARN_NONWC (1 << 16) + #define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */ ++#define TCQ_F_NOPARENT 0x40 /* root of its hierarchy : ++ * qdisc_tree_decrease_qlen() should stop. ++ */ + u32 limit; + const struct Qdisc_ops *ops; + struct qdisc_size_table __rcu *stab; +diff --git a/include/net/switchdev.h b/include/net/switchdev.h +index d5671f118bfc..0b9197975603 100644 +--- a/include/net/switchdev.h ++++ b/include/net/switchdev.h +@@ -268,7 +268,7 @@ static inline int switchdev_port_fdb_dump(struct sk_buff *skb, + struct net_device *filter_dev, + int idx) + { +- return -EOPNOTSUPP; ++ return idx; + } + + #endif +diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c +index cb31229a6fa4..34265a1ddb51 100644 +--- a/kernel/bpf/arraymap.c ++++ b/kernel/bpf/arraymap.c +@@ -104,7 +104,7 @@ static int array_map_update_elem(struct bpf_map *map, void *key, void *value, + /* all elements already exist */ + return -EEXIST; + +- memcpy(array->value + array->elem_size * index, value, array->elem_size); ++ memcpy(array->value + array->elem_size * index, value, map->value_size); + return 0; + } + +diff --git a/net/core/neighbour.c b/net/core/neighbour.c +index 84195dacb8b6..ecdb1717ef3a 100644 +--- a/net/core/neighbour.c ++++ b/net/core/neighbour.c +@@ -2210,7 +2210,7 @@ static int pneigh_fill_info(struct sk_buff *skb, struct pneigh_entry *pn, + ndm->ndm_pad2 = 0; + ndm->ndm_flags = pn->flags | NTF_PROXY; + ndm->ndm_type = RTN_UNICAST; +- ndm->ndm_ifindex = pn->dev->ifindex; ++ ndm->ndm_ifindex = pn->dev ? pn->dev->ifindex : 0; + ndm->ndm_state = NUD_NONE; + + if (nla_put(skb, NDA_DST, tbl->key_len, pn->key)) +@@ -2285,7 +2285,7 @@ static int pneigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb, + if (h > s_h) + s_idx = 0; + for (n = tbl->phash_buckets[h], idx = 0; n; n = n->next) { +- if (dev_net(n->dev) != net) ++ if (pneigh_net(n) != net) + continue; + if (idx < s_idx) + goto next; +diff --git a/net/core/scm.c b/net/core/scm.c +index 3b6899b7d810..8a1741b14302 100644 +--- a/net/core/scm.c ++++ b/net/core/scm.c +@@ -305,6 +305,8 @@ void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm) + err = put_user(cmlen, &cm->cmsg_len); + if (!err) { + cmlen = CMSG_SPACE(i*sizeof(int)); ++ if (msg->msg_controllen < cmlen) ++ cmlen = msg->msg_controllen; + msg->msg_control += cmlen; + msg->msg_controllen -= cmlen; + } +diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c +index 5165571f397a..a0490508d213 100644 +--- a/net/dccp/ipv6.c ++++ b/net/dccp/ipv6.c +@@ -202,7 +202,9 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req) + security_req_classify_flow(req, flowi6_to_flowi(&fl6)); + + +- final_p = fl6_update_dst(&fl6, np->opt, &final); ++ rcu_read_lock(); ++ final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt), &final); ++ rcu_read_unlock(); + + dst = ip6_dst_lookup_flow(sk, &fl6, final_p); + if (IS_ERR(dst)) { +@@ -219,7 +221,10 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req) + &ireq->ir_v6_loc_addr, + &ireq->ir_v6_rmt_addr); + fl6.daddr = ireq->ir_v6_rmt_addr; +- err = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass); ++ rcu_read_lock(); ++ err = ip6_xmit(sk, skb, &fl6, rcu_dereference(np->opt), ++ np->tclass); ++ rcu_read_unlock(); + err = net_xmit_eval(err); + } + +@@ -415,6 +420,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk, + { + struct inet_request_sock *ireq = inet_rsk(req); + struct ipv6_pinfo *newnp, *np = inet6_sk(sk); ++ struct ipv6_txoptions *opt; + struct inet_sock *newinet; + struct dccp6_sock *newdp6; + struct sock *newsk; +@@ -534,13 +540,15 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk, + * Yes, keeping reference count would be much more clever, but we make + * one more one thing there: reattach optmem to newsk. + */ +- if (np->opt != NULL) +- newnp->opt = ipv6_dup_options(newsk, np->opt); +- ++ opt = rcu_dereference(np->opt); ++ if (opt) { ++ opt = ipv6_dup_options(newsk, opt); ++ RCU_INIT_POINTER(newnp->opt, opt); ++ } + inet_csk(newsk)->icsk_ext_hdr_len = 0; +- if (newnp->opt != NULL) +- inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen + +- newnp->opt->opt_flen); ++ if (opt) ++ inet_csk(newsk)->icsk_ext_hdr_len = opt->opt_nflen + ++ opt->opt_flen; + + dccp_sync_mss(newsk, dst_mtu(dst)); + +@@ -793,6 +801,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr, + struct ipv6_pinfo *np = inet6_sk(sk); + struct dccp_sock *dp = dccp_sk(sk); + struct in6_addr *saddr = NULL, *final_p, final; ++ struct ipv6_txoptions *opt; + struct flowi6 fl6; + struct dst_entry *dst; + int addr_type; +@@ -892,7 +901,8 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr, + fl6.fl6_sport = inet->inet_sport; + security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); + +- final_p = fl6_update_dst(&fl6, np->opt, &final); ++ opt = rcu_dereference_protected(np->opt, sock_owned_by_user(sk)); ++ final_p = fl6_update_dst(&fl6, opt, &final); + + dst = ip6_dst_lookup_flow(sk, &fl6, final_p); + if (IS_ERR(dst)) { +@@ -912,9 +922,8 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr, + __ip6_dst_store(sk, dst, NULL, NULL); + + icsk->icsk_ext_hdr_len = 0; +- if (np->opt != NULL) +- icsk->icsk_ext_hdr_len = (np->opt->opt_flen + +- np->opt->opt_nflen); ++ if (opt) ++ icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; + + inet->inet_dport = usin->sin6_port; + +diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c +index df28693f32e1..c3bfebd501ed 100644 +--- a/net/ipv4/ipmr.c ++++ b/net/ipv4/ipmr.c +@@ -134,7 +134,7 @@ static int __ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, + struct mfc_cache *c, struct rtmsg *rtm); + static void mroute_netlink_event(struct mr_table *mrt, struct mfc_cache *mfc, + int cmd); +-static void mroute_clean_tables(struct mr_table *mrt); ++static void mroute_clean_tables(struct mr_table *mrt, bool all); + static void ipmr_expire_process(unsigned long arg); + + #ifdef CONFIG_IP_MROUTE_MULTIPLE_TABLES +@@ -351,7 +351,7 @@ static struct mr_table *ipmr_new_table(struct net *net, u32 id) + static void ipmr_free_table(struct mr_table *mrt) + { + del_timer_sync(&mrt->ipmr_expire_timer); +- mroute_clean_tables(mrt); ++ mroute_clean_tables(mrt, true); + kfree(mrt); + } + +@@ -1209,7 +1209,7 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, + * Close the multicast socket, and clear the vif tables etc + */ + +-static void mroute_clean_tables(struct mr_table *mrt) ++static void mroute_clean_tables(struct mr_table *mrt, bool all) + { + int i; + LIST_HEAD(list); +@@ -1218,8 +1218,9 @@ static void mroute_clean_tables(struct mr_table *mrt) + /* Shut down all active vif entries */ + + for (i = 0; i < mrt->maxvif; i++) { +- if (!(mrt->vif_table[i].flags & VIFF_STATIC)) +- vif_delete(mrt, i, 0, &list); ++ if (!all && (mrt->vif_table[i].flags & VIFF_STATIC)) ++ continue; ++ vif_delete(mrt, i, 0, &list); + } + unregister_netdevice_many(&list); + +@@ -1227,7 +1228,7 @@ static void mroute_clean_tables(struct mr_table *mrt) + + for (i = 0; i < MFC_LINES; i++) { + list_for_each_entry_safe(c, next, &mrt->mfc_cache_array[i], list) { +- if (c->mfc_flags & MFC_STATIC) ++ if (!all && (c->mfc_flags & MFC_STATIC)) + continue; + list_del_rcu(&c->list); + mroute_netlink_event(mrt, c, RTM_DELROUTE); +@@ -1262,7 +1263,7 @@ static void mrtsock_destruct(struct sock *sk) + NETCONFA_IFINDEX_ALL, + net->ipv4.devconf_all); + RCU_INIT_POINTER(mrt->mroute_sk, NULL); +- mroute_clean_tables(mrt); ++ mroute_clean_tables(mrt, false); + } + } + rtnl_unlock(); +diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c +index 728f5b3d3c64..77730b43469d 100644 +--- a/net/ipv4/tcp_input.c ++++ b/net/ipv4/tcp_input.c +@@ -4434,19 +4434,34 @@ static int __must_check tcp_queue_rcv(struct sock *sk, struct sk_buff *skb, int + int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size) + { + struct sk_buff *skb; ++ int err = -ENOMEM; ++ int data_len = 0; + bool fragstolen; + + if (size == 0) + return 0; + +- skb = alloc_skb(size, sk->sk_allocation); ++ if (size > PAGE_SIZE) { ++ int npages = min_t(size_t, size >> PAGE_SHIFT, MAX_SKB_FRAGS); ++ ++ data_len = npages << PAGE_SHIFT; ++ size = data_len + (size & ~PAGE_MASK); ++ } ++ skb = alloc_skb_with_frags(size - data_len, data_len, ++ PAGE_ALLOC_COSTLY_ORDER, ++ &err, sk->sk_allocation); + if (!skb) + goto err; + ++ skb_put(skb, size - data_len); ++ skb->data_len = data_len; ++ skb->len = size; ++ + if (tcp_try_rmem_schedule(sk, skb, skb->truesize)) + goto err_free; + +- if (memcpy_from_msg(skb_put(skb, size), msg, size)) ++ err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, size); ++ if (err) + goto err_free; + + TCP_SKB_CB(skb)->seq = tcp_sk(sk)->rcv_nxt; +@@ -4462,7 +4477,8 @@ int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size) + err_free: + kfree_skb(skb); + err: +- return -ENOMEM; ++ return err; ++ + } + + static void tcp_data_queue(struct sock *sk, struct sk_buff *skb) +@@ -5620,6 +5636,7 @@ discard: + } + + tp->rcv_nxt = TCP_SKB_CB(skb)->seq + 1; ++ tp->copied_seq = tp->rcv_nxt; + tp->rcv_wup = TCP_SKB_CB(skb)->seq + 1; + + /* RFC1323: The window in SYN & SYN/ACK segments is +diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c +index 0ea2e1c5d395..569c63894472 100644 +--- a/net/ipv4/tcp_ipv4.c ++++ b/net/ipv4/tcp_ipv4.c +@@ -922,7 +922,8 @@ int tcp_md5_do_add(struct sock *sk, const union tcp_md5_addr *addr, + } + + md5sig = rcu_dereference_protected(tp->md5sig_info, +- sock_owned_by_user(sk)); ++ sock_owned_by_user(sk) || ++ lockdep_is_held(&sk->sk_lock.slock)); + if (!md5sig) { + md5sig = kmalloc(sizeof(*md5sig), gfp); + if (!md5sig) +diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c +index 5b752f58a900..1e63c8fe1db8 100644 +--- a/net/ipv4/tcp_timer.c ++++ b/net/ipv4/tcp_timer.c +@@ -176,6 +176,18 @@ static int tcp_write_timeout(struct sock *sk) + syn_set = true; + } else { + if (retransmits_timed_out(sk, sysctl_tcp_retries1, 0, 0)) { ++ /* Some middle-boxes may black-hole Fast Open _after_ ++ * the handshake. Therefore we conservatively disable ++ * Fast Open on this path on recurring timeouts with ++ * few or zero bytes acked after Fast Open. ++ */ ++ if (tp->syn_data_acked && ++ tp->bytes_acked <= tp->rx_opt.mss_clamp) { ++ tcp_fastopen_cache_set(sk, 0, NULL, true, 0); ++ if (icsk->icsk_retransmits == sysctl_tcp_retries1) ++ NET_INC_STATS_BH(sock_net(sk), ++ LINUX_MIB_TCPFASTOPENACTIVEFAIL); ++ } + /* Black hole detection */ + tcp_mtu_probing(icsk, sk); + +diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c +index 7de52b65173f..d87519efc3bd 100644 +--- a/net/ipv6/af_inet6.c ++++ b/net/ipv6/af_inet6.c +@@ -426,9 +426,11 @@ void inet6_destroy_sock(struct sock *sk) + + /* Free tx options */ + +- opt = xchg(&np->opt, NULL); +- if (opt) +- sock_kfree_s(sk, opt, opt->tot_len); ++ opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL); ++ if (opt) { ++ atomic_sub(opt->tot_len, &sk->sk_omem_alloc); ++ txopt_put(opt); ++ } + } + EXPORT_SYMBOL_GPL(inet6_destroy_sock); + +@@ -657,7 +659,10 @@ int inet6_sk_rebuild_header(struct sock *sk) + fl6.fl6_sport = inet->inet_sport; + security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); + +- final_p = fl6_update_dst(&fl6, np->opt, &final); ++ rcu_read_lock(); ++ final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt), ++ &final); ++ rcu_read_unlock(); + + dst = ip6_dst_lookup_flow(sk, &fl6, final_p); + if (IS_ERR(dst)) { +diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c +index b10a88986a98..13ca4cf5616f 100644 +--- a/net/ipv6/datagram.c ++++ b/net/ipv6/datagram.c +@@ -167,8 +167,10 @@ ipv4_connected: + + security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); + +- opt = flowlabel ? flowlabel->opt : np->opt; ++ rcu_read_lock(); ++ opt = flowlabel ? flowlabel->opt : rcu_dereference(np->opt); + final_p = fl6_update_dst(&fl6, opt, &final); ++ rcu_read_unlock(); + + dst = ip6_dst_lookup_flow(sk, &fl6, final_p); + err = 0; +diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c +index a7bbbe45570b..adbd6958c398 100644 +--- a/net/ipv6/exthdrs.c ++++ b/net/ipv6/exthdrs.c +@@ -727,6 +727,7 @@ ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt) + *((char **)&opt2->dst1opt) += dif; + if (opt2->srcrt) + *((char **)&opt2->srcrt) += dif; ++ atomic_set(&opt2->refcnt, 1); + } + return opt2; + } +@@ -790,7 +791,7 @@ ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, + return ERR_PTR(-ENOBUFS); + + memset(opt2, 0, tot_len); +- ++ atomic_set(&opt2->refcnt, 1); + opt2->tot_len = tot_len; + p = (char *)(opt2 + 1); + +diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c +index 6927f3fb5597..9beed302eb36 100644 +--- a/net/ipv6/inet6_connection_sock.c ++++ b/net/ipv6/inet6_connection_sock.c +@@ -77,7 +77,9 @@ struct dst_entry *inet6_csk_route_req(struct sock *sk, + memset(fl6, 0, sizeof(*fl6)); + fl6->flowi6_proto = IPPROTO_TCP; + fl6->daddr = ireq->ir_v6_rmt_addr; +- final_p = fl6_update_dst(fl6, np->opt, &final); ++ rcu_read_lock(); ++ final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final); ++ rcu_read_unlock(); + fl6->saddr = ireq->ir_v6_loc_addr; + fl6->flowi6_oif = ireq->ir_iif; + fl6->flowi6_mark = ireq->ir_mark; +@@ -207,7 +209,9 @@ static struct dst_entry *inet6_csk_route_socket(struct sock *sk, + fl6->fl6_dport = inet->inet_dport; + security_sk_classify_flow(sk, flowi6_to_flowi(fl6)); + +- final_p = fl6_update_dst(fl6, np->opt, &final); ++ rcu_read_lock(); ++ final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final); ++ rcu_read_unlock(); + + dst = __inet6_csk_dst_check(sk, np->dst_cookie); + if (!dst) { +@@ -240,7 +244,8 @@ int inet6_csk_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl_unused + /* Restore final destination back after routing done */ + fl6.daddr = sk->sk_v6_daddr; + +- res = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass); ++ res = ip6_xmit(sk, skb, &fl6, rcu_dereference(np->opt), ++ np->tclass); + rcu_read_unlock(); + return res; + } +diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c +index 5f36266b1f5e..a7aef4b52d65 100644 +--- a/net/ipv6/ip6mr.c ++++ b/net/ipv6/ip6mr.c +@@ -118,7 +118,7 @@ static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, + int cmd); + static int ip6mr_rtm_dumproute(struct sk_buff *skb, + struct netlink_callback *cb); +-static void mroute_clean_tables(struct mr6_table *mrt); ++static void mroute_clean_tables(struct mr6_table *mrt, bool all); + static void ipmr_expire_process(unsigned long arg); + + #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES +@@ -335,7 +335,7 @@ static struct mr6_table *ip6mr_new_table(struct net *net, u32 id) + static void ip6mr_free_table(struct mr6_table *mrt) + { + del_timer_sync(&mrt->ipmr_expire_timer); +- mroute_clean_tables(mrt); ++ mroute_clean_tables(mrt, true); + kfree(mrt); + } + +@@ -1543,7 +1543,7 @@ static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt, + * Close the multicast socket, and clear the vif tables etc + */ + +-static void mroute_clean_tables(struct mr6_table *mrt) ++static void mroute_clean_tables(struct mr6_table *mrt, bool all) + { + int i; + LIST_HEAD(list); +@@ -1553,8 +1553,9 @@ static void mroute_clean_tables(struct mr6_table *mrt) + * Shut down all active vif entries + */ + for (i = 0; i < mrt->maxvif; i++) { +- if (!(mrt->vif6_table[i].flags & VIFF_STATIC)) +- mif6_delete(mrt, i, &list); ++ if (!all && (mrt->vif6_table[i].flags & VIFF_STATIC)) ++ continue; ++ mif6_delete(mrt, i, &list); + } + unregister_netdevice_many(&list); + +@@ -1563,7 +1564,7 @@ static void mroute_clean_tables(struct mr6_table *mrt) + */ + for (i = 0; i < MFC6_LINES; i++) { + list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) { +- if (c->mfc_flags & MFC_STATIC) ++ if (!all && (c->mfc_flags & MFC_STATIC)) + continue; + write_lock_bh(&mrt_lock); + list_del(&c->list); +@@ -1626,7 +1627,7 @@ int ip6mr_sk_done(struct sock *sk) + net->ipv6.devconf_all); + write_unlock_bh(&mrt_lock); + +- mroute_clean_tables(mrt); ++ mroute_clean_tables(mrt, false); + err = 0; + break; + } +diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c +index 63e6956917c9..4449ad1f8114 100644 +--- a/net/ipv6/ipv6_sockglue.c ++++ b/net/ipv6/ipv6_sockglue.c +@@ -111,7 +111,8 @@ struct ipv6_txoptions *ipv6_update_options(struct sock *sk, + icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); + } + } +- opt = xchg(&inet6_sk(sk)->opt, opt); ++ opt = xchg((__force struct ipv6_txoptions **)&inet6_sk(sk)->opt, ++ opt); + sk_dst_reset(sk); + + return opt; +@@ -231,9 +232,12 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, + sk->sk_socket->ops = &inet_dgram_ops; + sk->sk_family = PF_INET; + } +- opt = xchg(&np->opt, NULL); +- if (opt) +- sock_kfree_s(sk, opt, opt->tot_len); ++ opt = xchg((__force struct ipv6_txoptions **)&np->opt, ++ NULL); ++ if (opt) { ++ atomic_sub(opt->tot_len, &sk->sk_omem_alloc); ++ txopt_put(opt); ++ } + pktopt = xchg(&np->pktoptions, NULL); + kfree_skb(pktopt); + +@@ -403,7 +407,8 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, + if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) + break; + +- opt = ipv6_renew_options(sk, np->opt, optname, ++ opt = rcu_dereference_protected(np->opt, sock_owned_by_user(sk)); ++ opt = ipv6_renew_options(sk, opt, optname, + (struct ipv6_opt_hdr __user *)optval, + optlen); + if (IS_ERR(opt)) { +@@ -432,8 +437,10 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, + retv = 0; + opt = ipv6_update_options(sk, opt); + sticky_done: +- if (opt) +- sock_kfree_s(sk, opt, opt->tot_len); ++ if (opt) { ++ atomic_sub(opt->tot_len, &sk->sk_omem_alloc); ++ txopt_put(opt); ++ } + break; + } + +@@ -486,6 +493,7 @@ sticky_done: + break; + + memset(opt, 0, sizeof(*opt)); ++ atomic_set(&opt->refcnt, 1); + opt->tot_len = sizeof(*opt) + optlen; + retv = -EFAULT; + if (copy_from_user(opt+1, optval, optlen)) +@@ -502,8 +510,10 @@ update: + retv = 0; + opt = ipv6_update_options(sk, opt); + done: +- if (opt) +- sock_kfree_s(sk, opt, opt->tot_len); ++ if (opt) { ++ atomic_sub(opt->tot_len, &sk->sk_omem_alloc); ++ txopt_put(opt); ++ } + break; + } + case IPV6_UNICAST_HOPS: +@@ -1110,10 +1120,11 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, + case IPV6_RTHDR: + case IPV6_DSTOPTS: + { ++ struct ipv6_txoptions *opt; + + lock_sock(sk); +- len = ipv6_getsockopt_sticky(sk, np->opt, +- optname, optval, len); ++ opt = rcu_dereference_protected(np->opt, sock_owned_by_user(sk)); ++ len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len); + release_sock(sk); + /* check if ipv6_getsockopt_sticky() returns err code */ + if (len < 0) +diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c +index 083b2927fc67..41e3b5ee8d0b 100644 +--- a/net/ipv6/mcast.c ++++ b/net/ipv6/mcast.c +@@ -1651,7 +1651,6 @@ out: + if (!err) { + ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT); + ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); +- IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, payload_len); + } else { + IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); + } +@@ -2014,7 +2013,6 @@ out: + if (!err) { + ICMP6MSGOUT_INC_STATS(net, idev, type); + ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); +- IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len); + } else + IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); + +diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c +index 6d02498172c1..2a4682c847b0 100644 +--- a/net/ipv6/netfilter/nf_conntrack_reasm.c ++++ b/net/ipv6/netfilter/nf_conntrack_reasm.c +@@ -190,7 +190,7 @@ static void nf_ct_frag6_expire(unsigned long data) + /* Creation primitives. */ + static inline struct frag_queue *fq_find(struct net *net, __be32 id, + u32 user, struct in6_addr *src, +- struct in6_addr *dst, u8 ecn) ++ struct in6_addr *dst, int iif, u8 ecn) + { + struct inet_frag_queue *q; + struct ip6_create_arg arg; +@@ -200,6 +200,7 @@ static inline struct frag_queue *fq_find(struct net *net, __be32 id, + arg.user = user; + arg.src = src; + arg.dst = dst; ++ arg.iif = iif; + arg.ecn = ecn; + + local_bh_disable(); +@@ -603,7 +604,7 @@ struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb, u32 user) + fhdr = (struct frag_hdr *)skb_transport_header(clone); + + fq = fq_find(net, fhdr->identification, user, &hdr->saddr, &hdr->daddr, +- ip6_frag_ecn(hdr)); ++ skb->dev ? skb->dev->ifindex : 0, ip6_frag_ecn(hdr)); + if (fq == NULL) { + pr_debug("Can't find and can't create new queue\n"); + goto ret_orig; +diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c +index ca4700cb26c4..92d532967c90 100644 +--- a/net/ipv6/raw.c ++++ b/net/ipv6/raw.c +@@ -731,6 +731,7 @@ static int raw6_getfrag(void *from, char *to, int offset, int len, int odd, + + static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) + { ++ struct ipv6_txoptions *opt_to_free = NULL; + struct ipv6_txoptions opt_space; + DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); + struct in6_addr *daddr, *final_p, final; +@@ -837,8 +838,10 @@ static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) + if (!(opt->opt_nflen|opt->opt_flen)) + opt = NULL; + } +- if (!opt) +- opt = np->opt; ++ if (!opt) { ++ opt = txopt_get(np); ++ opt_to_free = opt; ++ } + if (flowlabel) + opt = fl6_merge_options(&opt_space, flowlabel, opt); + opt = ipv6_fixup_options(&opt_space, opt); +@@ -904,6 +907,7 @@ done: + dst_release(dst); + out: + fl6_sock_release(flowlabel); ++ txopt_put(opt_to_free); + return err < 0 ? err : len; + do_confirm: + dst_confirm(dst); +diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c +index f1159bb76e0a..04013a910ce5 100644 +--- a/net/ipv6/reassembly.c ++++ b/net/ipv6/reassembly.c +@@ -108,7 +108,10 @@ bool ip6_frag_match(const struct inet_frag_queue *q, const void *a) + return fq->id == arg->id && + fq->user == arg->user && + ipv6_addr_equal(&fq->saddr, arg->src) && +- ipv6_addr_equal(&fq->daddr, arg->dst); ++ ipv6_addr_equal(&fq->daddr, arg->dst) && ++ (arg->iif == fq->iif || ++ !(ipv6_addr_type(arg->dst) & (IPV6_ADDR_MULTICAST | ++ IPV6_ADDR_LINKLOCAL))); + } + EXPORT_SYMBOL(ip6_frag_match); + +@@ -180,7 +183,7 @@ static void ip6_frag_expire(unsigned long data) + + static struct frag_queue * + fq_find(struct net *net, __be32 id, const struct in6_addr *src, +- const struct in6_addr *dst, u8 ecn) ++ const struct in6_addr *dst, int iif, u8 ecn) + { + struct inet_frag_queue *q; + struct ip6_create_arg arg; +@@ -190,6 +193,7 @@ fq_find(struct net *net, __be32 id, const struct in6_addr *src, + arg.user = IP6_DEFRAG_LOCAL_DELIVER; + arg.src = src; + arg.dst = dst; ++ arg.iif = iif; + arg.ecn = ecn; + + hash = inet6_hash_frag(id, src, dst); +@@ -551,7 +555,7 @@ static int ipv6_frag_rcv(struct sk_buff *skb) + } + + fq = fq_find(net, fhdr->identification, &hdr->saddr, &hdr->daddr, +- ip6_frag_ecn(hdr)); ++ skb->dev ? skb->dev->ifindex : 0, ip6_frag_ecn(hdr)); + if (fq) { + int ret; + +diff --git a/net/ipv6/route.c b/net/ipv6/route.c +index dd6ebba5846c..8478719ef500 100644 +--- a/net/ipv6/route.c ++++ b/net/ipv6/route.c +@@ -401,6 +401,14 @@ static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev, + } + } + ++static bool __rt6_check_expired(const struct rt6_info *rt) ++{ ++ if (rt->rt6i_flags & RTF_EXPIRES) ++ return time_after(jiffies, rt->dst.expires); ++ else ++ return false; ++} ++ + static bool rt6_check_expired(const struct rt6_info *rt) + { + if (rt->rt6i_flags & RTF_EXPIRES) { +@@ -1255,7 +1263,8 @@ static struct dst_entry *rt6_check(struct rt6_info *rt, u32 cookie) + + static struct dst_entry *rt6_dst_from_check(struct rt6_info *rt, u32 cookie) + { +- if (rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK && ++ if (!__rt6_check_expired(rt) && ++ rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK && + rt6_check((struct rt6_info *)(rt->dst.from), cookie)) + return &rt->dst; + else +@@ -1275,7 +1284,8 @@ static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie) + + rt6_dst_from_metrics_check(rt); + +- if ((rt->rt6i_flags & RTF_PCPU) || unlikely(dst->flags & DST_NOCACHE)) ++ if (rt->rt6i_flags & RTF_PCPU || ++ (unlikely(dst->flags & DST_NOCACHE) && rt->dst.from)) + return rt6_dst_from_check(rt, cookie); + else + return rt6_check(rt, cookie); +@@ -1326,6 +1336,12 @@ static void rt6_do_update_pmtu(struct rt6_info *rt, u32 mtu) + rt6_update_expires(rt, net->ipv6.sysctl.ip6_rt_mtu_expires); + } + ++static bool rt6_cache_allowed_for_pmtu(const struct rt6_info *rt) ++{ ++ return !(rt->rt6i_flags & RTF_CACHE) && ++ (rt->rt6i_flags & RTF_PCPU || rt->rt6i_node); ++} ++ + static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk, + const struct ipv6hdr *iph, u32 mtu) + { +@@ -1339,7 +1355,7 @@ static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk, + if (mtu >= dst_mtu(dst)) + return; + +- if (rt6->rt6i_flags & RTF_CACHE) { ++ if (!rt6_cache_allowed_for_pmtu(rt6)) { + rt6_do_update_pmtu(rt6, mtu); + } else { + const struct in6_addr *daddr, *saddr; +diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c +index 0909f4e0d53c..f30bfdcdea54 100644 +--- a/net/ipv6/syncookies.c ++++ b/net/ipv6/syncookies.c +@@ -225,7 +225,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb) + memset(&fl6, 0, sizeof(fl6)); + fl6.flowi6_proto = IPPROTO_TCP; + fl6.daddr = ireq->ir_v6_rmt_addr; +- final_p = fl6_update_dst(&fl6, np->opt, &final); ++ final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt), &final); + fl6.saddr = ireq->ir_v6_loc_addr; + fl6.flowi6_oif = sk->sk_bound_dev_if; + fl6.flowi6_mark = ireq->ir_mark; +diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c +index 7a6cea5e4274..45e473ee340b 100644 +--- a/net/ipv6/tcp_ipv6.c ++++ b/net/ipv6/tcp_ipv6.c +@@ -120,6 +120,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr, + struct ipv6_pinfo *np = inet6_sk(sk); + struct tcp_sock *tp = tcp_sk(sk); + struct in6_addr *saddr = NULL, *final_p, final; ++ struct ipv6_txoptions *opt; + struct flowi6 fl6; + struct dst_entry *dst; + int addr_type; +@@ -235,7 +236,8 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr, + fl6.fl6_dport = usin->sin6_port; + fl6.fl6_sport = inet->inet_sport; + +- final_p = fl6_update_dst(&fl6, np->opt, &final); ++ opt = rcu_dereference_protected(np->opt, sock_owned_by_user(sk)); ++ final_p = fl6_update_dst(&fl6, opt, &final); + + security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); + +@@ -263,9 +265,9 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr, + tcp_fetch_timewait_stamp(sk, dst); + + icsk->icsk_ext_hdr_len = 0; +- if (np->opt) +- icsk->icsk_ext_hdr_len = (np->opt->opt_flen + +- np->opt->opt_nflen); ++ if (opt) ++ icsk->icsk_ext_hdr_len = opt->opt_flen + ++ opt->opt_nflen; + + tp->rx_opt.mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) - sizeof(struct ipv6hdr); + +@@ -461,7 +463,8 @@ static int tcp_v6_send_synack(struct sock *sk, struct dst_entry *dst, + fl6->flowlabel = ip6_flowlabel(ipv6_hdr(ireq->pktopts)); + + skb_set_queue_mapping(skb, queue_mapping); +- err = ip6_xmit(sk, skb, fl6, np->opt, np->tclass); ++ err = ip6_xmit(sk, skb, fl6, rcu_dereference(np->opt), ++ np->tclass); + err = net_xmit_eval(err); + } + +@@ -991,6 +994,7 @@ static struct sock *tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb, + struct inet_request_sock *ireq; + struct ipv6_pinfo *newnp, *np = inet6_sk(sk); + struct tcp6_sock *newtcp6sk; ++ struct ipv6_txoptions *opt; + struct inet_sock *newinet; + struct tcp_sock *newtp; + struct sock *newsk; +@@ -1126,13 +1130,15 @@ static struct sock *tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb, + but we make one more one thing there: reattach optmem + to newsk. + */ +- if (np->opt) +- newnp->opt = ipv6_dup_options(newsk, np->opt); +- ++ opt = rcu_dereference(np->opt); ++ if (opt) { ++ opt = ipv6_dup_options(newsk, opt); ++ RCU_INIT_POINTER(newnp->opt, opt); ++ } + inet_csk(newsk)->icsk_ext_hdr_len = 0; +- if (newnp->opt) +- inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen + +- newnp->opt->opt_flen); ++ if (opt) ++ inet_csk(newsk)->icsk_ext_hdr_len = opt->opt_nflen + ++ opt->opt_flen; + + tcp_ca_openreq_child(newsk, dst); + +diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c +index e51fc3eee6db..7333f3575fc5 100644 +--- a/net/ipv6/udp.c ++++ b/net/ipv6/udp.c +@@ -1107,6 +1107,7 @@ int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) + DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); + struct in6_addr *daddr, *final_p, final; + struct ipv6_txoptions *opt = NULL; ++ struct ipv6_txoptions *opt_to_free = NULL; + struct ip6_flowlabel *flowlabel = NULL; + struct flowi6 fl6; + struct dst_entry *dst; +@@ -1260,8 +1261,10 @@ do_udp_sendmsg: + opt = NULL; + connected = 0; + } +- if (!opt) +- opt = np->opt; ++ if (!opt) { ++ opt = txopt_get(np); ++ opt_to_free = opt; ++ } + if (flowlabel) + opt = fl6_merge_options(&opt_space, flowlabel, opt); + opt = ipv6_fixup_options(&opt_space, opt); +@@ -1370,6 +1373,7 @@ release_dst: + out: + dst_release(dst); + fl6_sock_release(flowlabel); ++ txopt_put(opt_to_free); + if (!err) + return len; + /* +diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c +index d1ded3777815..0ce9da948ad7 100644 +--- a/net/l2tp/l2tp_ip6.c ++++ b/net/l2tp/l2tp_ip6.c +@@ -486,6 +486,7 @@ static int l2tp_ip6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) + DECLARE_SOCKADDR(struct sockaddr_l2tpip6 *, lsa, msg->msg_name); + struct in6_addr *daddr, *final_p, final; + struct ipv6_pinfo *np = inet6_sk(sk); ++ struct ipv6_txoptions *opt_to_free = NULL; + struct ipv6_txoptions *opt = NULL; + struct ip6_flowlabel *flowlabel = NULL; + struct dst_entry *dst = NULL; +@@ -575,8 +576,10 @@ static int l2tp_ip6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) + opt = NULL; + } + +- if (opt == NULL) +- opt = np->opt; ++ if (!opt) { ++ opt = txopt_get(np); ++ opt_to_free = opt; ++ } + if (flowlabel) + opt = fl6_merge_options(&opt_space, flowlabel, opt); + opt = ipv6_fixup_options(&opt_space, opt); +@@ -631,6 +634,7 @@ done: + dst_release(dst); + out: + fl6_sock_release(flowlabel); ++ txopt_put(opt_to_free); + + return err < 0 ? err : len; + +diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c +index 71cb085e16fd..71d671c06952 100644 +--- a/net/packet/af_packet.c ++++ b/net/packet/af_packet.c +@@ -1622,6 +1622,20 @@ static void fanout_release(struct sock *sk) + kfree_rcu(po->rollover, rcu); + } + ++static bool packet_extra_vlan_len_allowed(const struct net_device *dev, ++ struct sk_buff *skb) ++{ ++ /* Earlier code assumed this would be a VLAN pkt, double-check ++ * this now that we have the actual packet in hand. We can only ++ * do this check on Ethernet devices. ++ */ ++ if (unlikely(dev->type != ARPHRD_ETHER)) ++ return false; ++ ++ skb_reset_mac_header(skb); ++ return likely(eth_hdr(skb)->h_proto == htons(ETH_P_8021Q)); ++} ++ + static const struct proto_ops packet_ops; + + static const struct proto_ops packet_ops_spkt; +@@ -1783,18 +1797,10 @@ retry: + goto retry; + } + +- if (len > (dev->mtu + dev->hard_header_len + extra_len)) { +- /* Earlier code assumed this would be a VLAN pkt, +- * double-check this now that we have the actual +- * packet in hand. +- */ +- struct ethhdr *ehdr; +- skb_reset_mac_header(skb); +- ehdr = eth_hdr(skb); +- if (ehdr->h_proto != htons(ETH_P_8021Q)) { +- err = -EMSGSIZE; +- goto out_unlock; +- } ++ if (len > (dev->mtu + dev->hard_header_len + extra_len) && ++ !packet_extra_vlan_len_allowed(dev, skb)) { ++ err = -EMSGSIZE; ++ goto out_unlock; + } + + skb->protocol = proto; +@@ -2213,6 +2219,15 @@ static bool ll_header_truncated(const struct net_device *dev, int len) + return false; + } + ++static void tpacket_set_protocol(const struct net_device *dev, ++ struct sk_buff *skb) ++{ ++ if (dev->type == ARPHRD_ETHER) { ++ skb_reset_mac_header(skb); ++ skb->protocol = eth_hdr(skb)->h_proto; ++ } ++} ++ + static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb, + void *frame, struct net_device *dev, int size_max, + __be16 proto, unsigned char *addr, int hlen) +@@ -2249,8 +2264,6 @@ static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb, + skb_reserve(skb, hlen); + skb_reset_network_header(skb); + +- if (!packet_use_direct_xmit(po)) +- skb_probe_transport_header(skb, 0); + if (unlikely(po->tp_tx_has_off)) { + int off_min, off_max, off; + off_min = po->tp_hdrlen - sizeof(struct sockaddr_ll); +@@ -2296,6 +2309,8 @@ static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb, + dev->hard_header_len); + if (unlikely(err)) + return err; ++ if (!skb->protocol) ++ tpacket_set_protocol(dev, skb); + + data += dev->hard_header_len; + to_write -= dev->hard_header_len; +@@ -2330,6 +2345,8 @@ static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb, + len = ((to_write > len_max) ? len_max : to_write); + } + ++ skb_probe_transport_header(skb, 0); ++ + return tp_len; + } + +@@ -2374,12 +2391,13 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg) + if (unlikely(!(dev->flags & IFF_UP))) + goto out_put; + +- reserve = dev->hard_header_len + VLAN_HLEN; ++ if (po->sk.sk_socket->type == SOCK_RAW) ++ reserve = dev->hard_header_len; + size_max = po->tx_ring.frame_size + - (po->tp_hdrlen - sizeof(struct sockaddr_ll)); + +- if (size_max > dev->mtu + reserve) +- size_max = dev->mtu + reserve; ++ if (size_max > dev->mtu + reserve + VLAN_HLEN) ++ size_max = dev->mtu + reserve + VLAN_HLEN; + + do { + ph = packet_current_frame(po, &po->tx_ring, +@@ -2406,18 +2424,10 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg) + tp_len = tpacket_fill_skb(po, skb, ph, dev, size_max, proto, + addr, hlen); + if (likely(tp_len >= 0) && +- tp_len > dev->mtu + dev->hard_header_len) { +- struct ethhdr *ehdr; +- /* Earlier code assumed this would be a VLAN pkt, +- * double-check this now that we have the actual +- * packet in hand. +- */ ++ tp_len > dev->mtu + reserve && ++ !packet_extra_vlan_len_allowed(dev, skb)) ++ tp_len = -EMSGSIZE; + +- skb_reset_mac_header(skb); +- ehdr = eth_hdr(skb); +- if (ehdr->h_proto != htons(ETH_P_8021Q)) +- tp_len = -EMSGSIZE; +- } + if (unlikely(tp_len < 0)) { + if (po->tp_loss) { + __packet_set_status(po, ph, +@@ -2638,18 +2648,10 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len) + + sock_tx_timestamp(sk, &skb_shinfo(skb)->tx_flags); + +- if (!gso_type && (len > dev->mtu + reserve + extra_len)) { +- /* Earlier code assumed this would be a VLAN pkt, +- * double-check this now that we have the actual +- * packet in hand. +- */ +- struct ethhdr *ehdr; +- skb_reset_mac_header(skb); +- ehdr = eth_hdr(skb); +- if (ehdr->h_proto != htons(ETH_P_8021Q)) { +- err = -EMSGSIZE; +- goto out_free; +- } ++ if (!gso_type && (len > dev->mtu + reserve + extra_len) && ++ !packet_extra_vlan_len_allowed(dev, skb)) { ++ err = -EMSGSIZE; ++ goto out_free; + } + + skb->protocol = proto; +@@ -2680,8 +2682,8 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len) + len += vnet_hdr_len; + } + +- if (!packet_use_direct_xmit(po)) +- skb_probe_transport_header(skb, reserve); ++ skb_probe_transport_header(skb, reserve); ++ + if (unlikely(extra_len == 4)) + skb->no_fcs = 1; + +diff --git a/net/rds/connection.c b/net/rds/connection.c +index 9d66705f9d41..da6da57e5f36 100644 +--- a/net/rds/connection.c ++++ b/net/rds/connection.c +@@ -187,12 +187,6 @@ new_conn: + } + } + +- if (trans == NULL) { +- kmem_cache_free(rds_conn_slab, conn); +- conn = ERR_PTR(-ENODEV); +- goto out; +- } +- + conn->c_trans = trans; + + ret = trans->conn_alloc(conn, gfp); +diff --git a/net/rds/send.c b/net/rds/send.c +index e9430f537f9c..7b30c0f3180d 100644 +--- a/net/rds/send.c ++++ b/net/rds/send.c +@@ -986,11 +986,13 @@ int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len) + release_sock(sk); + } + +- /* racing with another thread binding seems ok here */ ++ lock_sock(sk); + if (daddr == 0 || rs->rs_bound_addr == 0) { ++ release_sock(sk); + ret = -ENOTCONN; /* XXX not a great errno */ + goto out; + } ++ release_sock(sk); + + /* size of rm including all sgs */ + ret = rds_rm_size(msg, payload_len); +diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c +index f06aa01d60fd..1a0aa2a7cfeb 100644 +--- a/net/sched/sch_api.c ++++ b/net/sched/sch_api.c +@@ -253,7 +253,8 @@ int qdisc_set_default(const char *name) + } + + /* We know handle. Find qdisc among all qdisc's attached to device +- (root qdisc, all its children, children of children etc.) ++ * (root qdisc, all its children, children of children etc.) ++ * Note: caller either uses rtnl or rcu_read_lock() + */ + + static struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle) +@@ -264,7 +265,7 @@ static struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle) + root->handle == handle) + return root; + +- list_for_each_entry(q, &root->list, list) { ++ list_for_each_entry_rcu(q, &root->list, list) { + if (q->handle == handle) + return q; + } +@@ -277,15 +278,18 @@ void qdisc_list_add(struct Qdisc *q) + struct Qdisc *root = qdisc_dev(q)->qdisc; + + WARN_ON_ONCE(root == &noop_qdisc); +- list_add_tail(&q->list, &root->list); ++ ASSERT_RTNL(); ++ list_add_tail_rcu(&q->list, &root->list); + } + } + EXPORT_SYMBOL(qdisc_list_add); + + void qdisc_list_del(struct Qdisc *q) + { +- if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS)) +- list_del(&q->list); ++ if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS)) { ++ ASSERT_RTNL(); ++ list_del_rcu(&q->list); ++ } + } + EXPORT_SYMBOL(qdisc_list_del); + +@@ -750,14 +754,18 @@ void qdisc_tree_decrease_qlen(struct Qdisc *sch, unsigned int n) + if (n == 0) + return; + drops = max_t(int, n, 0); ++ rcu_read_lock(); + while ((parentid = sch->parent)) { + if (TC_H_MAJ(parentid) == TC_H_MAJ(TC_H_INGRESS)) +- return; ++ break; + ++ if (sch->flags & TCQ_F_NOPARENT) ++ break; ++ /* TODO: perform the search on a per txq basis */ + sch = qdisc_lookup(qdisc_dev(sch), TC_H_MAJ(parentid)); + if (sch == NULL) { +- WARN_ON(parentid != TC_H_ROOT); +- return; ++ WARN_ON_ONCE(parentid != TC_H_ROOT); ++ break; + } + cops = sch->ops->cl_ops; + if (cops->qlen_notify) { +@@ -768,6 +776,7 @@ void qdisc_tree_decrease_qlen(struct Qdisc *sch, unsigned int n) + sch->q.qlen -= n; + __qdisc_qstats_drop(sch, drops); + } ++ rcu_read_unlock(); + } + EXPORT_SYMBOL(qdisc_tree_decrease_qlen); + +@@ -941,7 +950,7 @@ qdisc_create(struct net_device *dev, struct netdev_queue *dev_queue, + } + lockdep_set_class(qdisc_lock(sch), &qdisc_tx_lock); + if (!netif_is_multiqueue(dev)) +- sch->flags |= TCQ_F_ONETXQUEUE; ++ sch->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT; + } + + sch->handle = handle; +diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c +index 6efca30894aa..b453270be3fd 100644 +--- a/net/sched/sch_generic.c ++++ b/net/sched/sch_generic.c +@@ -743,7 +743,7 @@ static void attach_one_default_qdisc(struct net_device *dev, + return; + } + if (!netif_is_multiqueue(dev)) +- qdisc->flags |= TCQ_F_ONETXQUEUE; ++ qdisc->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT; + } + dev_queue->qdisc_sleeping = qdisc; + } +diff --git a/net/sched/sch_mq.c b/net/sched/sch_mq.c +index f3cbaecd283a..3e82f047caaf 100644 +--- a/net/sched/sch_mq.c ++++ b/net/sched/sch_mq.c +@@ -63,7 +63,7 @@ static int mq_init(struct Qdisc *sch, struct nlattr *opt) + if (qdisc == NULL) + goto err; + priv->qdiscs[ntx] = qdisc; +- qdisc->flags |= TCQ_F_ONETXQUEUE; ++ qdisc->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT; + } + + sch->flags |= TCQ_F_MQROOT; +@@ -156,7 +156,7 @@ static int mq_graft(struct Qdisc *sch, unsigned long cl, struct Qdisc *new, + + *old = dev_graft_qdisc(dev_queue, new); + if (new) +- new->flags |= TCQ_F_ONETXQUEUE; ++ new->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT; + if (dev->flags & IFF_UP) + dev_activate(dev); + return 0; +diff --git a/net/sched/sch_mqprio.c b/net/sched/sch_mqprio.c +index 3811a745452c..ad70ecf57ce7 100644 +--- a/net/sched/sch_mqprio.c ++++ b/net/sched/sch_mqprio.c +@@ -132,7 +132,7 @@ static int mqprio_init(struct Qdisc *sch, struct nlattr *opt) + goto err; + } + priv->qdiscs[i] = qdisc; +- qdisc->flags |= TCQ_F_ONETXQUEUE; ++ qdisc->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT; + } + + /* If the mqprio options indicate that hardware should own +@@ -209,7 +209,7 @@ static int mqprio_graft(struct Qdisc *sch, unsigned long cl, struct Qdisc *new, + *old = dev_graft_qdisc(dev_queue, new); + + if (new) +- new->flags |= TCQ_F_ONETXQUEUE; ++ new->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT; + + if (dev->flags & IFF_UP) + dev_activate(dev); +diff --git a/net/sctp/auth.c b/net/sctp/auth.c +index 4f15b7d730e1..1543e39f47c3 100644 +--- a/net/sctp/auth.c ++++ b/net/sctp/auth.c +@@ -809,8 +809,8 @@ int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep, + if (!has_sha1) + return -EINVAL; + +- memcpy(ep->auth_hmacs_list->hmac_ids, &hmacs->shmac_idents[0], +- hmacs->shmac_num_idents * sizeof(__u16)); ++ for (i = 0; i < hmacs->shmac_num_idents; i++) ++ ep->auth_hmacs_list->hmac_ids[i] = htons(hmacs->shmac_idents[i]); + ep->auth_hmacs_list->param_hdr.length = htons(sizeof(sctp_paramhdr_t) + + hmacs->shmac_num_idents * sizeof(__u16)); + return 0; +diff --git a/net/sctp/socket.c b/net/sctp/socket.c +index 17bef01b9aa3..3ec88be0faec 100644 +--- a/net/sctp/socket.c ++++ b/net/sctp/socket.c +@@ -7375,6 +7375,13 @@ struct proto sctp_prot = { + + #if IS_ENABLED(CONFIG_IPV6) + ++#include <net/transp_v6.h> ++static void sctp_v6_destroy_sock(struct sock *sk) ++{ ++ sctp_destroy_sock(sk); ++ inet6_destroy_sock(sk); ++} ++ + struct proto sctpv6_prot = { + .name = "SCTPv6", + .owner = THIS_MODULE, +@@ -7384,7 +7391,7 @@ struct proto sctpv6_prot = { + .accept = sctp_accept, + .ioctl = sctp_ioctl, + .init = sctp_init_sock, +- .destroy = sctp_destroy_sock, ++ .destroy = sctp_v6_destroy_sock, + .shutdown = sctp_shutdown, + .setsockopt = sctp_setsockopt, + .getsockopt = sctp_getsockopt, +diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c +index 94f658235fb4..128b0982c96b 100644 +--- a/net/unix/af_unix.c ++++ b/net/unix/af_unix.c +@@ -326,6 +326,118 @@ found: + return s; + } + ++/* Support code for asymmetrically connected dgram sockets ++ * ++ * If a datagram socket is connected to a socket not itself connected ++ * to the first socket (eg, /dev/log), clients may only enqueue more ++ * messages if the present receive queue of the server socket is not ++ * "too large". This means there's a second writeability condition ++ * poll and sendmsg need to test. The dgram recv code will do a wake ++ * up on the peer_wait wait queue of a socket upon reception of a ++ * datagram which needs to be propagated to sleeping would-be writers ++ * since these might not have sent anything so far. This can't be ++ * accomplished via poll_wait because the lifetime of the server ++ * socket might be less than that of its clients if these break their ++ * association with it or if the server socket is closed while clients ++ * are still connected to it and there's no way to inform "a polling ++ * implementation" that it should let go of a certain wait queue ++ * ++ * In order to propagate a wake up, a wait_queue_t of the client ++ * socket is enqueued on the peer_wait queue of the server socket ++ * whose wake function does a wake_up on the ordinary client socket ++ * wait queue. This connection is established whenever a write (or ++ * poll for write) hit the flow control condition and broken when the ++ * association to the server socket is dissolved or after a wake up ++ * was relayed. ++ */ ++ ++static int unix_dgram_peer_wake_relay(wait_queue_t *q, unsigned mode, int flags, ++ void *key) ++{ ++ struct unix_sock *u; ++ wait_queue_head_t *u_sleep; ++ ++ u = container_of(q, struct unix_sock, peer_wake); ++ ++ __remove_wait_queue(&unix_sk(u->peer_wake.private)->peer_wait, ++ q); ++ u->peer_wake.private = NULL; ++ ++ /* relaying can only happen while the wq still exists */ ++ u_sleep = sk_sleep(&u->sk); ++ if (u_sleep) ++ wake_up_interruptible_poll(u_sleep, key); ++ ++ return 0; ++} ++ ++static int unix_dgram_peer_wake_connect(struct sock *sk, struct sock *other) ++{ ++ struct unix_sock *u, *u_other; ++ int rc; ++ ++ u = unix_sk(sk); ++ u_other = unix_sk(other); ++ rc = 0; ++ spin_lock(&u_other->peer_wait.lock); ++ ++ if (!u->peer_wake.private) { ++ u->peer_wake.private = other; ++ __add_wait_queue(&u_other->peer_wait, &u->peer_wake); ++ ++ rc = 1; ++ } ++ ++ spin_unlock(&u_other->peer_wait.lock); ++ return rc; ++} ++ ++static void unix_dgram_peer_wake_disconnect(struct sock *sk, ++ struct sock *other) ++{ ++ struct unix_sock *u, *u_other; ++ ++ u = unix_sk(sk); ++ u_other = unix_sk(other); ++ spin_lock(&u_other->peer_wait.lock); ++ ++ if (u->peer_wake.private == other) { ++ __remove_wait_queue(&u_other->peer_wait, &u->peer_wake); ++ u->peer_wake.private = NULL; ++ } ++ ++ spin_unlock(&u_other->peer_wait.lock); ++} ++ ++static void unix_dgram_peer_wake_disconnect_wakeup(struct sock *sk, ++ struct sock *other) ++{ ++ unix_dgram_peer_wake_disconnect(sk, other); ++ wake_up_interruptible_poll(sk_sleep(sk), ++ POLLOUT | ++ POLLWRNORM | ++ POLLWRBAND); ++} ++ ++/* preconditions: ++ * - unix_peer(sk) == other ++ * - association is stable ++ */ ++static int unix_dgram_peer_wake_me(struct sock *sk, struct sock *other) ++{ ++ int connected; ++ ++ connected = unix_dgram_peer_wake_connect(sk, other); ++ ++ if (unix_recvq_full(other)) ++ return 1; ++ ++ if (connected) ++ unix_dgram_peer_wake_disconnect(sk, other); ++ ++ return 0; ++} ++ + static inline int unix_writable(struct sock *sk) + { + return (atomic_read(&sk->sk_wmem_alloc) << 2) <= sk->sk_sndbuf; +@@ -430,6 +542,8 @@ static void unix_release_sock(struct sock *sk, int embrion) + skpair->sk_state_change(skpair); + sk_wake_async(skpair, SOCK_WAKE_WAITD, POLL_HUP); + } ++ ++ unix_dgram_peer_wake_disconnect(sk, skpair); + sock_put(skpair); /* It may now die */ + unix_peer(sk) = NULL; + } +@@ -440,6 +554,7 @@ static void unix_release_sock(struct sock *sk, int embrion) + if (state == TCP_LISTEN) + unix_release_sock(skb->sk, 1); + /* passed fds are erased in the kfree_skb hook */ ++ UNIXCB(skb).consumed = skb->len; + kfree_skb(skb); + } + +@@ -664,6 +779,7 @@ static struct sock *unix_create1(struct net *net, struct socket *sock, int kern) + INIT_LIST_HEAD(&u->link); + mutex_init(&u->readlock); /* single task reading lock */ + init_waitqueue_head(&u->peer_wait); ++ init_waitqueue_func_entry(&u->peer_wake, unix_dgram_peer_wake_relay); + unix_insert_socket(unix_sockets_unbound(sk), sk); + out: + if (sk == NULL) +@@ -1031,6 +1147,8 @@ restart: + if (unix_peer(sk)) { + struct sock *old_peer = unix_peer(sk); + unix_peer(sk) = other; ++ unix_dgram_peer_wake_disconnect_wakeup(sk, old_peer); ++ + unix_state_double_unlock(sk, other); + + if (other != old_peer) +@@ -1432,6 +1550,14 @@ static int unix_scm_to_skb(struct scm_cookie *scm, struct sk_buff *skb, bool sen + return err; + } + ++static bool unix_passcred_enabled(const struct socket *sock, ++ const struct sock *other) ++{ ++ return test_bit(SOCK_PASSCRED, &sock->flags) || ++ !other->sk_socket || ++ test_bit(SOCK_PASSCRED, &other->sk_socket->flags); ++} ++ + /* + * Some apps rely on write() giving SCM_CREDENTIALS + * We include credentials if source or destination socket +@@ -1442,14 +1568,41 @@ static void maybe_add_creds(struct sk_buff *skb, const struct socket *sock, + { + if (UNIXCB(skb).pid) + return; +- if (test_bit(SOCK_PASSCRED, &sock->flags) || +- !other->sk_socket || +- test_bit(SOCK_PASSCRED, &other->sk_socket->flags)) { ++ if (unix_passcred_enabled(sock, other)) { + UNIXCB(skb).pid = get_pid(task_tgid(current)); + current_uid_gid(&UNIXCB(skb).uid, &UNIXCB(skb).gid); + } + } + ++static int maybe_init_creds(struct scm_cookie *scm, ++ struct socket *socket, ++ const struct sock *other) ++{ ++ int err; ++ struct msghdr msg = { .msg_controllen = 0 }; ++ ++ err = scm_send(socket, &msg, scm, false); ++ if (err) ++ return err; ++ ++ if (unix_passcred_enabled(socket, other)) { ++ scm->pid = get_pid(task_tgid(current)); ++ current_uid_gid(&scm->creds.uid, &scm->creds.gid); ++ } ++ return err; ++} ++ ++static bool unix_skb_scm_eq(struct sk_buff *skb, ++ struct scm_cookie *scm) ++{ ++ const struct unix_skb_parms *u = &UNIXCB(skb); ++ ++ return u->pid == scm->pid && ++ uid_eq(u->uid, scm->creds.uid) && ++ gid_eq(u->gid, scm->creds.gid) && ++ unix_secdata_eq(scm, skb); ++} ++ + /* + * Send AF_UNIX data. + */ +@@ -1470,6 +1623,7 @@ static int unix_dgram_sendmsg(struct socket *sock, struct msghdr *msg, + struct scm_cookie scm; + int max_level; + int data_len = 0; ++ int sk_locked; + + wait_for_unix_gc(); + err = scm_send(sock, msg, &scm, false); +@@ -1548,12 +1702,14 @@ restart: + goto out_free; + } + ++ sk_locked = 0; + unix_state_lock(other); ++restart_locked: + err = -EPERM; + if (!unix_may_send(sk, other)) + goto out_unlock; + +- if (sock_flag(other, SOCK_DEAD)) { ++ if (unlikely(sock_flag(other, SOCK_DEAD))) { + /* + * Check with 1003.1g - what should + * datagram error +@@ -1561,10 +1717,14 @@ restart: + unix_state_unlock(other); + sock_put(other); + ++ if (!sk_locked) ++ unix_state_lock(sk); ++ + err = 0; +- unix_state_lock(sk); + if (unix_peer(sk) == other) { + unix_peer(sk) = NULL; ++ unix_dgram_peer_wake_disconnect_wakeup(sk, other); ++ + unix_state_unlock(sk); + + unix_dgram_disconnected(sk, other); +@@ -1590,21 +1750,38 @@ restart: + goto out_unlock; + } + +- if (unix_peer(other) != sk && unix_recvq_full(other)) { +- if (!timeo) { +- err = -EAGAIN; +- goto out_unlock; ++ if (unlikely(unix_peer(other) != sk && unix_recvq_full(other))) { ++ if (timeo) { ++ timeo = unix_wait_for_peer(other, timeo); ++ ++ err = sock_intr_errno(timeo); ++ if (signal_pending(current)) ++ goto out_free; ++ ++ goto restart; + } + +- timeo = unix_wait_for_peer(other, timeo); ++ if (!sk_locked) { ++ unix_state_unlock(other); ++ unix_state_double_lock(sk, other); ++ } + +- err = sock_intr_errno(timeo); +- if (signal_pending(current)) +- goto out_free; ++ if (unix_peer(sk) != other || ++ unix_dgram_peer_wake_me(sk, other)) { ++ err = -EAGAIN; ++ sk_locked = 1; ++ goto out_unlock; ++ } + +- goto restart; ++ if (!sk_locked) { ++ sk_locked = 1; ++ goto restart_locked; ++ } + } + ++ if (unlikely(sk_locked)) ++ unix_state_unlock(sk); ++ + if (sock_flag(other, SOCK_RCVTSTAMP)) + __net_timestamp(skb); + maybe_add_creds(skb, sock, other); +@@ -1618,6 +1795,8 @@ restart: + return len; + + out_unlock: ++ if (sk_locked) ++ unix_state_unlock(sk); + unix_state_unlock(other); + out_free: + kfree_skb(skb); +@@ -1739,8 +1918,10 @@ out_err: + static ssize_t unix_stream_sendpage(struct socket *socket, struct page *page, + int offset, size_t size, int flags) + { +- int err = 0; +- bool send_sigpipe = true; ++ int err; ++ bool send_sigpipe = false; ++ bool init_scm = true; ++ struct scm_cookie scm; + struct sock *other, *sk = socket->sk; + struct sk_buff *skb, *newskb = NULL, *tail = NULL; + +@@ -1758,7 +1939,7 @@ alloc_skb: + newskb = sock_alloc_send_pskb(sk, 0, 0, flags & MSG_DONTWAIT, + &err, 0); + if (!newskb) +- return err; ++ goto err; + } + + /* we must acquire readlock as we modify already present +@@ -1767,12 +1948,12 @@ alloc_skb: + err = mutex_lock_interruptible(&unix_sk(other)->readlock); + if (err) { + err = flags & MSG_DONTWAIT ? -EAGAIN : -ERESTARTSYS; +- send_sigpipe = false; + goto err; + } + + if (sk->sk_shutdown & SEND_SHUTDOWN) { + err = -EPIPE; ++ send_sigpipe = true; + goto err_unlock; + } + +@@ -1781,23 +1962,34 @@ alloc_skb: + if (sock_flag(other, SOCK_DEAD) || + other->sk_shutdown & RCV_SHUTDOWN) { + err = -EPIPE; ++ send_sigpipe = true; + goto err_state_unlock; + } + ++ if (init_scm) { ++ err = maybe_init_creds(&scm, socket, other); ++ if (err) ++ goto err_state_unlock; ++ init_scm = false; ++ } ++ + skb = skb_peek_tail(&other->sk_receive_queue); + if (tail && tail == skb) { + skb = newskb; +- } else if (!skb) { +- if (newskb) ++ } else if (!skb || !unix_skb_scm_eq(skb, &scm)) { ++ if (newskb) { + skb = newskb; +- else ++ } else { ++ tail = skb; + goto alloc_skb; ++ } + } else if (newskb) { + /* this is fast path, we don't necessarily need to + * call to kfree_skb even though with newskb == NULL + * this - does no harm + */ + consume_skb(newskb); ++ newskb = NULL; + } + + if (skb_append_pagefrags(skb, page, offset, size)) { +@@ -1810,14 +2002,20 @@ alloc_skb: + skb->truesize += size; + atomic_add(size, &sk->sk_wmem_alloc); + +- if (newskb) ++ if (newskb) { ++ err = unix_scm_to_skb(&scm, skb, false); ++ if (err) ++ goto err_state_unlock; ++ spin_lock(&other->sk_receive_queue.lock); + __skb_queue_tail(&other->sk_receive_queue, newskb); ++ spin_unlock(&other->sk_receive_queue.lock); ++ } + + unix_state_unlock(other); + mutex_unlock(&unix_sk(other)->readlock); + + other->sk_data_ready(other); +- ++ scm_destroy(&scm); + return size; + + err_state_unlock: +@@ -1828,6 +2026,8 @@ err: + kfree_skb(newskb); + if (send_sigpipe && !(flags & MSG_NOSIGNAL)) + send_sig(SIGPIPE, current, 0); ++ if (!init_scm) ++ scm_destroy(&scm); + return err; + } + +@@ -2071,6 +2271,7 @@ static int unix_stream_read_generic(struct unix_stream_read_state *state) + + do { + int chunk; ++ bool drop_skb; + struct sk_buff *skb, *last; + + unix_state_lock(sk); +@@ -2130,10 +2331,7 @@ unlock: + + if (check_creds) { + /* Never glue messages from different writers */ +- if ((UNIXCB(skb).pid != scm.pid) || +- !uid_eq(UNIXCB(skb).uid, scm.creds.uid) || +- !gid_eq(UNIXCB(skb).gid, scm.creds.gid) || +- !unix_secdata_eq(&scm, skb)) ++ if (!unix_skb_scm_eq(skb, &scm)) + break; + } else if (test_bit(SOCK_PASSCRED, &sock->flags)) { + /* Copy credentials */ +@@ -2151,7 +2349,11 @@ unlock: + } + + chunk = min_t(unsigned int, unix_skb_len(skb) - skip, size); ++ skb_get(skb); + chunk = state->recv_actor(skb, skip, chunk, state); ++ drop_skb = !unix_skb_len(skb); ++ /* skb is only safe to use if !drop_skb */ ++ consume_skb(skb); + if (chunk < 0) { + if (copied == 0) + copied = -EFAULT; +@@ -2160,6 +2362,18 @@ unlock: + copied += chunk; + size -= chunk; + ++ if (drop_skb) { ++ /* the skb was touched by a concurrent reader; ++ * we should not expect anything from this skb ++ * anymore and assume it invalid - we can be ++ * sure it was dropped from the socket queue ++ * ++ * let's report a short read ++ */ ++ err = 0; ++ break; ++ } ++ + /* Mark read part of skb as used */ + if (!(flags & MSG_PEEK)) { + UNIXCB(skb).consumed += chunk; +@@ -2453,14 +2667,16 @@ static unsigned int unix_dgram_poll(struct file *file, struct socket *sock, + return mask; + + writable = unix_writable(sk); +- other = unix_peer_get(sk); +- if (other) { +- if (unix_peer(other) != sk) { +- sock_poll_wait(file, &unix_sk(other)->peer_wait, wait); +- if (unix_recvq_full(other)) +- writable = 0; +- } +- sock_put(other); ++ if (writable) { ++ unix_state_lock(sk); ++ ++ other = unix_peer(sk); ++ if (other && unix_peer(other) != sk && ++ unix_recvq_full(other) && ++ unix_dgram_peer_wake_me(sk, other)) ++ writable = 0; ++ ++ unix_state_unlock(sk); + } + + if (writable) +diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c +index a97db5fc8a15..9d1f91db57e6 100644 +--- a/sound/pci/hda/patch_hdmi.c ++++ b/sound/pci/hda/patch_hdmi.c +@@ -48,8 +48,9 @@ MODULE_PARM_DESC(static_hdmi_pcm, "Don't restrict PCM parameters per ELD info"); + #define is_haswell(codec) ((codec)->core.vendor_id == 0x80862807) + #define is_broadwell(codec) ((codec)->core.vendor_id == 0x80862808) + #define is_skylake(codec) ((codec)->core.vendor_id == 0x80862809) ++#define is_broxton(codec) ((codec)->core.vendor_id == 0x8086280a) + #define is_haswell_plus(codec) (is_haswell(codec) || is_broadwell(codec) \ +- || is_skylake(codec)) ++ || is_skylake(codec) || is_broxton(codec)) + + #define is_valleyview(codec) ((codec)->core.vendor_id == 0x80862882) + #define is_cherryview(codec) ((codec)->core.vendor_id == 0x80862883) +diff --git a/tools/net/Makefile b/tools/net/Makefile +index ee577ea03ba5..ddf888010652 100644 +--- a/tools/net/Makefile ++++ b/tools/net/Makefile +@@ -4,6 +4,9 @@ CC = gcc + LEX = flex + YACC = bison + ++CFLAGS += -Wall -O2 ++CFLAGS += -D__EXPORTED_HEADERS__ -I../../include/uapi -I../../include ++ + %.yacc.c: %.y + $(YACC) -o $@ -d $< + +@@ -12,15 +15,13 @@ YACC = bison + + all : bpf_jit_disasm bpf_dbg bpf_asm + +-bpf_jit_disasm : CFLAGS = -Wall -O2 -DPACKAGE='bpf_jit_disasm' ++bpf_jit_disasm : CFLAGS += -DPACKAGE='bpf_jit_disasm' + bpf_jit_disasm : LDLIBS = -lopcodes -lbfd -ldl + bpf_jit_disasm : bpf_jit_disasm.o + +-bpf_dbg : CFLAGS = -Wall -O2 + bpf_dbg : LDLIBS = -lreadline + bpf_dbg : bpf_dbg.o + +-bpf_asm : CFLAGS = -Wall -O2 -I. + bpf_asm : LDLIBS = + bpf_asm : bpf_asm.o bpf_exp.yacc.o bpf_exp.lex.o + bpf_exp.lex.o : bpf_exp.yacc.c
