1 files changed, 352 insertions, 148 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index f1a77449d032..d3d44486290b 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -58,9 +58,10 @@
 #include "inode-map.h"
 #include "backref.h"
 #include "hash.h"
+#include "props.h"
 
 struct btrfs_iget_args {
-        u64 ino;
+        struct btrfs_key *location;
         struct btrfs_root *root;
 };
 
@@ -125,13 +126,12 @@ static int btrfs_init_inode_security(struct btrfs_trans_handle *trans,
  * no overlapping inline items exist in the btree
  */
 static noinline int insert_inline_extent(struct btrfs_trans_handle *trans,
+                                struct btrfs_path *path, int extent_inserted,
                                 struct btrfs_root *root, struct inode *inode,
                                 u64 start, size_t size, size_t compressed_size,
                                 int compress_type,
                                 struct page **compressed_pages)
 {
-        struct btrfs_key key;
-        struct btrfs_path *path;
         struct extent_buffer *leaf;
         struct page *page = NULL;
         char *kaddr;
@@ -140,29 +140,29 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans,
         int err = 0;
         int ret;
         size_t cur_size = size;
-        size_t datasize;
         unsigned long offset;
 
         if (compressed_size && compressed_pages)
                 cur_size = compressed_size;
 
-        path = btrfs_alloc_path();
-        if (!path)
-                return -ENOMEM;
+        inode_add_bytes(inode, size);
 
-        path->leave_spinning = 1;
+        if (!extent_inserted) {
+                struct btrfs_key key;
+                size_t datasize;
 
-        key.objectid = btrfs_ino(inode);
-        key.offset = start;
-        btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY);
-        datasize = btrfs_file_extent_calc_inline_size(cur_size);
+                key.objectid = btrfs_ino(inode);
+                key.offset = start;
+                btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY);
 
-        inode_add_bytes(inode, size);
-        ret = btrfs_insert_empty_item(trans, root, path, &key,
-                                      datasize);
-        if (ret) {
-                err = ret;
-                goto fail;
+                datasize = btrfs_file_extent_calc_inline_size(cur_size);
+                path->leave_spinning = 1;
+                ret = btrfs_insert_empty_item(trans, root, path, &key,
+                                              datasize);
+                if (ret) {
+                        err = ret;
+                        goto fail;
+                }
         }
         leaf = path->nodes[0];
         ei = btrfs_item_ptr(leaf, path->slots[0],
@@ -203,7 +203,7 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans,
                 page_cache_release(page);
         }
         btrfs_mark_buffer_dirty(leaf);
-        btrfs_free_path(path);
+        btrfs_release_path(path);
 
         /*
          * we're an inline extent, so nobody can
@@ -219,7 +219,6 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans,
 
         return ret;
 fail:
-        btrfs_free_path(path);
         return err;
 }
 
@@ -242,6 +241,9 @@ static noinline int cow_file_range_inline(struct btrfs_root *root,
         u64 aligned_end = ALIGN(end, root->sectorsize);
         u64 data_len = inline_len;
         int ret;
+        struct btrfs_path *path;
+        int extent_inserted = 0;
+        u32 extent_item_size;
 
         if (compressed_size)
                 data_len = compressed_size;
@@ -256,12 +258,27 @@ static noinline int cow_file_range_inline(struct btrfs_root *root,
                 return 1;
         }
 
+        path = btrfs_alloc_path();
+        if (!path)
+                return -ENOMEM;
+
         trans = btrfs_join_transaction(root);
-        if (IS_ERR(trans))
+        if (IS_ERR(trans)) {
+                btrfs_free_path(path);
                 return PTR_ERR(trans);
+        }
         trans->block_rsv = &root->fs_info->delalloc_block_rsv;
 
-        ret = btrfs_drop_extents(trans, root, inode, start, aligned_end, 1);
+        if (compressed_size && compressed_pages)
+                extent_item_size = btrfs_file_extent_calc_inline_size(
+                   compressed_size);
+        else
+                extent_item_size = btrfs_file_extent_calc_inline_size(
+                    inline_len);
+
+        ret = __btrfs_drop_extents(trans, root, inode, path,
+                                   start, aligned_end, NULL,
+                                   1, 1, extent_item_size, &extent_inserted);
         if (ret) {
                 btrfs_abort_transaction(trans, root, ret);
                 goto out;
@@ -269,7 +286,8 @@ static noinline int cow_file_range_inline(struct btrfs_root *root,
 
         if (isize > actual_end)
                 inline_len = min_t(u64, isize, actual_end);
-        ret = insert_inline_extent(trans, root, inode, start,
+        ret = insert_inline_extent(trans, path, extent_inserted,
+                                   root, inode, start,
                                    inline_len, compressed_size,
                                    compress_type, compressed_pages);
         if (ret && ret != -ENOSPC) {
@@ -284,6 +302,7 @@ static noinline int cow_file_range_inline(struct btrfs_root *root,
         btrfs_delalloc_release_metadata(inode, end + 1 - start);
         btrfs_drop_extent_cache(inode, start, aligned_end - 1, 0);
 out:
+        btrfs_free_path(path);
         btrfs_end_transaction(trans, root);
         return ret;
 }
@@ -1262,7 +1281,8 @@ next_slot:
                         nocow = 1;
                 } else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
                         extent_end = found_key.offset +
-                                btrfs_file_extent_inline_len(leaf, fi);
+                                btrfs_file_extent_inline_len(leaf,
+                                                     path->slots[0], fi);
                         extent_end = ALIGN(extent_end, root->sectorsize);
                 } else {
                         BUG_ON(1);
@@ -1577,7 +1597,7 @@ int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
                          unsigned long bio_flags)
 {
         struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
-        u64 logical = (u64)bio->bi_sector << 9;
+        u64 logical = (u64)bio->bi_iter.bi_sector << 9;
         u64 length = 0;
         u64 map_length;
         int ret;
@@ -1585,7 +1605,7 @@ int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
         if (bio_flags & EXTENT_BIO_COMPRESSED)
                 return 0;
 
-        length = bio->bi_size;
+        length = bio->bi_iter.bi_size;
         map_length = length;
         ret = btrfs_map_block(root->fs_info, rw, logical,
                               &map_length, NULL, 0);
@@ -1841,14 +1861,13 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
         struct btrfs_path *path;
         struct extent_buffer *leaf;
         struct btrfs_key ins;
+        int extent_inserted = 0;
         int ret;
 
         path = btrfs_alloc_path();
         if (!path)
                 return -ENOMEM;
 
-        path->leave_spinning = 1;
-
         /*
          * we may be replacing one extent in the tree with another.
          * The new extent is pinned in the extent map, and we don't want
@@ -1858,17 +1877,23 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
          * the caller is expected to unpin it and allow it to be merged
          * with the others.
          */
-        ret = btrfs_drop_extents(trans, root, inode, file_pos,
-                                 file_pos + num_bytes, 0);
+        ret = __btrfs_drop_extents(trans, root, inode, path, file_pos,
+                                   file_pos + num_bytes, NULL, 0,
+                                   1, sizeof(*fi), &extent_inserted);
         if (ret)
                 goto out;
 
-        ins.objectid = btrfs_ino(inode);
-        ins.offset = file_pos;
-        ins.type = BTRFS_EXTENT_DATA_KEY;
-        ret = btrfs_insert_empty_item(trans, root, path, &ins, sizeof(*fi));
-        if (ret)
-                goto out;
+        if (!extent_inserted) {
+                ins.objectid = btrfs_ino(inode);
+                ins.offset = file_pos;
+                ins.type = BTRFS_EXTENT_DATA_KEY;
+
+                path->leave_spinning = 1;
+                ret = btrfs_insert_empty_item(trans, root, path, &ins,
+                                              sizeof(*fi));
+                if (ret)
+                        goto out;
+        }
         leaf = path->nodes[0];
         fi = btrfs_item_ptr(leaf, path->slots[0],
                             struct btrfs_file_extent_item);
@@ -2290,7 +2315,7 @@ again:
                 u64 extent_len;
                 struct btrfs_key found_key;
 
-                ret = btrfs_search_slot(trans, root, &key, path, 1, 1);
+                ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
                 if (ret < 0)
                         goto out_free_path;
 
@@ -2543,12 +2568,6 @@ out_kfree:
         return NULL;
 }
 
-/*
- * helper function for btrfs_finish_ordered_io, this
- * just reads in some of the csum leaves to prime them into ram
- * before we start the transaction.  It limits the amount of btree
- * reads required while inside the transaction.
- */
 /* as ordered data IO finishes, this gets called so we can finish
  * an ordered extent if the range of bytes in the file it covers are
  * fully written.
@@ -2610,7 +2629,7 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
                         EXTENT_DEFRAG, 1, cached_state);
         if (ret) {
                 u64 last_snapshot = btrfs_root_last_snapshot(&root->root_item);
-                if (last_snapshot >= BTRFS_I(inode)->generation)
+                if (0 && last_snapshot >= BTRFS_I(inode)->generation)
                         /* the inode is shared */
                         new = record_old_file_extents(inode, ordered_extent);
 
@@ -3248,7 +3267,8 @@ out:
  * slot is the slot the inode is in, objectid is the objectid of the inode
  */
 static noinline int acls_after_inode_item(struct extent_buffer *leaf,
-                                          int slot, u64 objectid)
+                                          int slot, u64 objectid,
+                                          int *first_xattr_slot)
 {
         u32 nritems = btrfs_header_nritems(leaf);
         struct btrfs_key found_key;
@@ -3264,6 +3284,7 @@ static noinline int acls_after_inode_item(struct extent_buffer *leaf,
         }
 
         slot++;
+        *first_xattr_slot = -1;
         while (slot < nritems) {
                 btrfs_item_key_to_cpu(leaf, &found_key, slot);
 
@@ -3273,6 +3294,8 @@ static noinline int acls_after_inode_item(struct extent_buffer *leaf,
 
                 /* we found an xattr, assume we've got an acl */
                 if (found_key.type == BTRFS_XATTR_ITEM_KEY) {
+                        if (*first_xattr_slot == -1)
+                                *first_xattr_slot = slot;
                         if (found_key.offset == xattr_access ||
                             found_key.offset == xattr_default)
                                 return 1;
@@ -3301,6 +3324,8 @@ static noinline int acls_after_inode_item(struct extent_buffer *leaf,
          * something larger than an xattr.  We have to assume the inode
          * has acls
          */
+        if (*first_xattr_slot == -1)
+                *first_xattr_slot = slot;
         return 1;
 }
 
@@ -3315,10 +3340,12 @@ static void btrfs_read_locked_inode(struct inode *inode)
         struct btrfs_timespec *tspec;
         struct btrfs_root *root = BTRFS_I(inode)->root;
         struct btrfs_key location;
+        unsigned long ptr;
         int maybe_acls;
         u32 rdev;
         int ret;
         bool filled = false;
+        int first_xattr_slot;
 
         ret = btrfs_fill_inode(inode, &rdev);
         if (!ret)
@@ -3328,7 +3355,6 @@ static void btrfs_read_locked_inode(struct inode *inode)
         if (!path)
                 goto make_bad;
 
-        path->leave_spinning = 1;
         memcpy(&location, &BTRFS_I(inode)->location, sizeof(location));
 
         ret = btrfs_lookup_inode(NULL, root, path, &location, 0);
@@ -3338,7 +3364,7 @@ static void btrfs_read_locked_inode(struct inode *inode)
         leaf = path->nodes[0];
 
         if (filled)
-                goto cache_acl;
+                goto cache_index;
 
         inode_item = btrfs_item_ptr(leaf, path->slots[0],
                                     struct btrfs_inode_item);
@@ -3381,18 +3407,51 @@ static void btrfs_read_locked_inode(struct inode *inode)
 
         BTRFS_I(inode)->index_cnt = (u64)-1;
         BTRFS_I(inode)->flags = btrfs_inode_flags(leaf, inode_item);
+
+cache_index:
+        path->slots[0]++;
+        if (inode->i_nlink != 1 ||
+            path->slots[0] >= btrfs_header_nritems(leaf))
+                goto cache_acl;
+
+        btrfs_item_key_to_cpu(leaf, &location, path->slots[0]);
+        if (location.objectid != btrfs_ino(inode))
+                goto cache_acl;
+
+        ptr = btrfs_item_ptr_offset(leaf, path->slots[0]);
+        if (location.type == BTRFS_INODE_REF_KEY) {
+                struct btrfs_inode_ref *ref;
+
+                ref = (struct btrfs_inode_ref *)ptr;
+                BTRFS_I(inode)->dir_index = btrfs_inode_ref_index(leaf, ref);
+        } else if (location.type == BTRFS_INODE_EXTREF_KEY) {
+                struct btrfs_inode_extref *extref;
+
+                extref = (struct btrfs_inode_extref *)ptr;
+                BTRFS_I(inode)->dir_index = btrfs_inode_extref_index(leaf,
+                                                                     extref);
+        }
 cache_acl:
         /*
          * try to precache a NULL acl entry for files that don't have
          * any xattrs or acls
          */
         maybe_acls = acls_after_inode_item(leaf, path->slots[0],
-                                           btrfs_ino(inode));
+                                           btrfs_ino(inode), &first_xattr_slot);
+        if (first_xattr_slot != -1) {
+                path->slots[0] = first_xattr_slot;
+                ret = btrfs_load_inode_props(inode, path);
+                if (ret)
+                        btrfs_err(root->fs_info,
+                                  "error loading props for ino %llu (root %llu): %d\n",
+                                  btrfs_ino(inode),
+                                  root->root_key.objectid, ret);
+        }
+        btrfs_free_path(path);
+
         if (!maybe_acls)
                 cache_no_acl(inode);
 
-        btrfs_free_path(path);
-
         switch (inode->i_mode & S_IFMT) {
         case S_IFREG:
                 inode->i_mapping->a_ops = &btrfs_aops;
@@ -3496,7 +3555,6 @@ static noinline int btrfs_update_inode_item(struct btrfs_trans_handle *trans,
                 goto failed;
         }
 
-        btrfs_unlock_up_safe(path, 1);
         leaf = path->nodes[0];
         inode_item = btrfs_item_ptr(leaf, path->slots[0],
                                     struct btrfs_inode_item);
@@ -3593,6 +3651,24 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans,
                 goto err;
         btrfs_release_path(path);
 
+        /*
+         * If we don't have dir index, we have to get it by looking up
+         * the inode ref, since we get the inode ref, remove it directly,
+         * it is unnecessary to do delayed deletion.
+         *
+         * But if we have dir index, needn't search inode ref to get it.
+         * Since the inode ref is close to the inode item, it is better
+         * that we delay to delete it, and just do this deletion when
+         * we update the inode item.
+         */
+        if (BTRFS_I(inode)->dir_index) {
+                ret = btrfs_delayed_delete_inode_ref(inode);
+                if (!ret) {
+                        index = BTRFS_I(inode)->dir_index;
+                        goto skip_backref;
+                }
+        }
+
         ret = btrfs_del_inode_ref(trans, root, name, name_len, ino,
                                   dir_ino, &index);
         if (ret) {
@@ -3602,7 +3678,7 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans,
                 btrfs_abort_transaction(trans, root, ret);
                 goto err;
         }
-
+skip_backref:
         ret = btrfs_delete_delayed_dir_index(trans, root, dir, index);
         if (ret) {
                 btrfs_abort_transaction(trans, root, ret);
@@ -3948,7 +4024,7 @@ search_again:
                                     btrfs_file_extent_num_bytes(leaf, fi);
                         } else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
                                 item_end += btrfs_file_extent_inline_len(leaf,
-                                                                         fi);
+                                                         path->slots[0], fi);
                         }
                         item_end--;
                 }
@@ -4018,6 +4094,12 @@ search_again:
                                         inode_sub_bytes(inode, item_end + 1 -
                                                         new_size);
                                 }
+
+                                /*
+                                 * update the ram bytes to properly reflect
+                                 * the new size of our item
+                                 */
+                                btrfs_set_file_extent_ram_bytes(leaf, fi, size);
                                 size =
                                     btrfs_file_extent_calc_inline_size(size);
                                 btrfs_truncate_item(root, path, size, 1);
@@ -4203,6 +4285,49 @@ out:
         return ret;
 }
 
+static int maybe_insert_hole(struct btrfs_root *root, struct inode *inode,
+                             u64 offset, u64 len)
+{
+        struct btrfs_trans_handle *trans;
+        int ret;
+
+        /*
+         * Still need to make sure the inode looks like it's been updated so
+         * that any holes get logged if we fsync.
+         */
+        if (btrfs_fs_incompat(root->fs_info, NO_HOLES)) {
+                BTRFS_I(inode)->last_trans = root->fs_info->generation;
+                BTRFS_I(inode)->last_sub_trans = root->log_transid;
+                BTRFS_I(inode)->last_log_commit = root->last_log_commit;
+                return 0;
+        }
+
+        /*
+         * 1 - for the one we're dropping
+         * 1 - for the one we're adding
+         * 1 - for updating the inode.
+         */
+        trans = btrfs_start_transaction(root, 3);
+        if (IS_ERR(trans))
+                return PTR_ERR(trans);
+
+        ret = btrfs_drop_extents(trans, root, inode, offset, offset + len, 1);
+        if (ret) {
+                btrfs_abort_transaction(trans, root, ret);
+                btrfs_end_transaction(trans, root);
+                return ret;
+        }
+
+        ret = btrfs_insert_file_extent(trans, root, btrfs_ino(inode), offset,
+                                       0, 0, len, 0, len, 0, 0, 0);
+        if (ret)
+                btrfs_abort_transaction(trans, root, ret);
+        else
+                btrfs_update_inode(trans, root, inode);
+        btrfs_end_transaction(trans, root);
+        return ret;
+}
+
 /*
  * This function puts in dummy file extents for the area we're creating a hole
  * for.  So if we are truncating this file to a larger size we need to insert
@@ -4211,7 +4336,6 @@ out:
  */
 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
 {
-        struct btrfs_trans_handle *trans;
         struct btrfs_root *root = BTRFS_I(inode)->root;
         struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
         struct extent_map *em = NULL;
@@ -4266,31 +4390,10 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
                         struct extent_map *hole_em;
                         hole_size = last_byte - cur_offset;
 
-                        trans = btrfs_start_transaction(root, 3);
-                        if (IS_ERR(trans)) {
-                                err = PTR_ERR(trans);
-                                break;
-                        }
-
-                        err = btrfs_drop_extents(trans, root, inode,
-                                                 cur_offset,
-                                                 cur_offset + hole_size, 1);
-                        if (err) {
-                                btrfs_abort_transaction(trans, root, err);
-                                btrfs_end_transaction(trans, root);
-                                break;
-                        }
-
-                        err = btrfs_insert_file_extent(trans, root,
-                                        btrfs_ino(inode), cur_offset, 0,
-                                        0, hole_size, 0, hole_size,
-                                        0, 0, 0);
-                        if (err) {
-                                btrfs_abort_transaction(trans, root, err);
-                                btrfs_end_transaction(trans, root);
+                        err = maybe_insert_hole(root, inode, cur_offset,
+                                                hole_size);
+                        if (err)
                                 break;
-                        }
-
                         btrfs_drop_extent_cache(inode, cur_offset,
                                                 cur_offset + hole_size - 1, 0);
                         hole_em = alloc_extent_map();
@@ -4309,7 +4412,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
                         hole_em->ram_bytes = hole_size;
                         hole_em->bdev = root->fs_info->fs_devices->latest_bdev;
                         hole_em->compress_type = BTRFS_COMPRESS_NONE;
-                        hole_em->generation = trans->transid;
+                        hole_em->generation = root->fs_info->generation;
 
                         while (1) {
                                 write_lock(&em_tree->lock);
@@ -4322,17 +4425,14 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
                                                         hole_size - 1, 0);
                         }
                         free_extent_map(hole_em);
-next:
-                        btrfs_update_inode(trans, root, inode);
-                        btrfs_end_transaction(trans, root);
                 }
+next:
                 free_extent_map(em);
                 em = NULL;
                 cur_offset = last_byte;
                 if (cur_offset >= block_end)
                         break;
         }
-
         free_extent_map(em);
         unlock_extent_cached(io_tree, hole_start, block_end - 1, &cached_state,
                              GFP_NOFS);
@@ -4354,8 +4454,12 @@ static int btrfs_setsize(struct inode *inode, struct iattr *attr)
          * these flags set.  For all other operations the VFS set these flags
          * explicitly if it wants a timestamp update.
          */
-        if (newsize != oldsize && (!(mask & (ATTR_CTIME | ATTR_MTIME))))
-                inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
+        if (newsize != oldsize) {
+                inode_inc_iversion(inode);
+                if (!(mask & (ATTR_CTIME | ATTR_MTIME)))
+                        inode->i_ctime = inode->i_mtime =
+                                current_fs_time(inode->i_sb);
+        }
 
         if (newsize > oldsize) {
                 truncate_pagecache(inode, newsize);
@@ -4464,12 +4568,70 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
                 err = btrfs_dirty_inode(inode);
 
                 if (!err && attr->ia_valid & ATTR_MODE)
-                        err = btrfs_acl_chmod(inode);
+                        err = posix_acl_chmod(inode, inode->i_mode);
         }
 
         return err;
 }
 
+/*
+ * While truncating the inode pages during eviction, we get the VFS calling
+ * btrfs_invalidatepage() against each page of the inode. This is slow because
+ * the calls to btrfs_invalidatepage() result in a huge amount of calls to
+ * lock_extent_bits() and clear_extent_bit(), which keep merging and splitting
+ * extent_state structures over and over, wasting lots of time.
+ *
+ * Therefore if the inode is being evicted, let btrfs_invalidatepage() skip all
+ * those expensive operations on a per page basis and do only the ordered io
+ * finishing, while we release here the extent_map and extent_state structures,
+ * without the excessive merging and splitting.
+ */
+static void evict_inode_truncate_pages(struct inode *inode)
+{
+        struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
+        struct extent_map_tree *map_tree = &BTRFS_I(inode)->extent_tree;
+        struct rb_node *node;
+
+        ASSERT(inode->i_state & I_FREEING);
+        truncate_inode_pages(&inode->i_data, 0);
+
+        write_lock(&map_tree->lock);
+        while (!RB_EMPTY_ROOT(&map_tree->map)) {
+                struct extent_map *em;
+
+                node = rb_first(&map_tree->map);
+                em = rb_entry(node, struct extent_map, rb_node);
+                clear_bit(EXTENT_FLAG_PINNED, &em->flags);
+                clear_bit(EXTENT_FLAG_LOGGING, &em->flags);
+                remove_extent_mapping(map_tree, em);
+                free_extent_map(em);
+        }
+        write_unlock(&map_tree->lock);
+
+        spin_lock(&io_tree->lock);
+        while (!RB_EMPTY_ROOT(&io_tree->state)) {
+                struct extent_state *state;
+                struct extent_state *cached_state = NULL;
+
+                node = rb_first(&io_tree->state);
+                state = rb_entry(node, struct extent_state, rb_node);
+                atomic_inc(&state->refs);
+                spin_unlock(&io_tree->lock);
+
+                lock_extent_bits(io_tree, state->start, state->end,
+                                 0, &cached_state);
+                clear_extent_bit(io_tree, state->start, state->end,
+                                 EXTENT_LOCKED | EXTENT_DIRTY |
+                                 EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING |
+                                 EXTENT_DEFRAG, 1, 1,
+                                 &cached_state, GFP_NOFS);
+                free_extent_state(state);
+
+                spin_lock(&io_tree->lock);
+        }
+        spin_unlock(&io_tree->lock);
+}
+
 void btrfs_evict_inode(struct inode *inode)
 {
         struct btrfs_trans_handle *trans;
@@ -4480,7 +4642,8 @@ void btrfs_evict_inode(struct inode *inode)
 
         trace_btrfs_inode_evict(inode);
 
-        truncate_inode_pages(&inode->i_data, 0);
+        evict_inode_truncate_pages(inode);
+
         if (inode->i_nlink &&
             ((btrfs_root_refs(&root->root_item) != 0 &&
               root->root_key.objectid != BTRFS_ROOT_TREE_OBJECTID) ||
@@ -4655,9 +4818,9 @@ static int fixup_tree_root_location(struct btrfs_root *root,
         }
 
         err = -ENOENT;
-        ret = btrfs_find_root_ref(root->fs_info->tree_root, path,
-                                  BTRFS_I(dir)->root->root_key.objectid,
-                                  location->objectid);
+        ret = btrfs_find_item(root->fs_info->tree_root, path,
+                                BTRFS_I(dir)->root->root_key.objectid,
+                                location->objectid, BTRFS_ROOT_REF_KEY, NULL);
         if (ret) {
                 if (ret < 0)
                         err = ret;
@@ -4818,7 +4981,9 @@ again:
 static int btrfs_init_locked_inode(struct inode *inode, void *p)
 {
         struct btrfs_iget_args *args = p;
-        inode->i_ino = args->ino;
+        inode->i_ino = args->location->objectid;
+        memcpy(&BTRFS_I(inode)->location, args->location,
+               sizeof(*args->location));
         BTRFS_I(inode)->root = args->root;
         return 0;
 }
@@ -4826,19 +4991,19 @@ static int btrfs_init_locked_inode(struct inode *inode, void *p)
 static int btrfs_find_actor(struct inode *inode, void *opaque)
 {
         struct btrfs_iget_args *args = opaque;
-        return args->ino == btrfs_ino(inode) &&
+        return args->location->objectid == BTRFS_I(inode)->location.objectid &&
                 args->root == BTRFS_I(inode)->root;
 }
 
 static struct inode *btrfs_iget_locked(struct super_block *s,
-                                       u64 objectid,
+                                       struct btrfs_key *location,
                                        struct btrfs_root *root)
 {
         struct inode *inode;
         struct btrfs_iget_args args;
-        unsigned long hashval = btrfs_inode_hash(objectid, root);
+        unsigned long hashval = btrfs_inode_hash(location->objectid, root);
 
-        args.ino = objectid;
+        args.location = location;
         args.root = root;
 
         inode = iget5_locked(s, hashval, btrfs_find_actor,
@@ -4855,13 +5020,11 @@ struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
 {
         struct inode *inode;
 
-        inode = btrfs_iget_locked(s, location->objectid, root);
+        inode = btrfs_iget_locked(s, location, root);
         if (!inode)
                 return ERR_PTR(-ENOMEM);
 
         if (inode->i_state & I_NEW) {
-                BTRFS_I(inode)->root = root;
-                memcpy(&BTRFS_I(inode)->location, location, sizeof(*location));
                 btrfs_read_locked_inode(inode);
                 if (!is_bad_inode(inode)) {
                         inode_tree_add(inode);
@@ -4917,7 +5080,7 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
                 return ERR_PTR(ret);
 
         if (location.objectid == 0)
-                return NULL;
+                return ERR_PTR(-ENOENT);
 
         if (location.type == BTRFS_INODE_ITEM_KEY) {
                 inode = btrfs_iget(dir->i_sb, &location, root, NULL);
@@ -4981,10 +5144,17 @@ static void btrfs_dentry_release(struct dentry *dentry)
 static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
                                    unsigned int flags)
 {
-        struct dentry *ret;
+        struct inode *inode;
 
-        ret = d_splice_alias(btrfs_lookup_dentry(dir, dentry), dentry);
-        return ret;
+        inode = btrfs_lookup_dentry(dir, dentry);
+        if (IS_ERR(inode)) {
+                if (PTR_ERR(inode) == -ENOENT)
+                        inode = NULL;
+                else
+                        return ERR_CAST(inode);
+        }
+
+        return d_materialise_unique(dentry, inode);
 }
 
 unsigned char btrfs_filetype_table[] = {
@@ -5354,7 +5524,6 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
         u32 sizes[2];
         unsigned long ptr;
         int ret;
-        int owner;
 
         path = btrfs_alloc_path();
         if (!path)
@@ -5388,6 +5557,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
          * number
          */
         BTRFS_I(inode)->index_cnt = 2;
+        BTRFS_I(inode)->dir_index = *index;
         BTRFS_I(inode)->root = root;
         BTRFS_I(inode)->generation = trans->transid;
         inode->i_generation = BTRFS_I(inode)->generation;
@@ -5400,11 +5570,6 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
          */
         set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &BTRFS_I(inode)->runtime_flags);
 
-        if (S_ISDIR(mode))
-                owner = 0;
-        else
-                owner = 1;
-
         key[0].objectid = objectid;
         btrfs_set_key_type(&key[0], BTRFS_INODE_ITEM_KEY);
         key[0].offset = 0;
@@ -5469,6 +5634,12 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
 
         btrfs_update_root_times(trans, root);
 
+        ret = btrfs_inode_inherit_props(trans, inode, dir);
+        if (ret)
+                btrfs_err(root->fs_info,
+                          "error inheriting props for ino %llu (root %llu): %d",
+                          btrfs_ino(inode), root->root_key.objectid, ret);
+
         return inode;
 fail:
         if (dir)
@@ -5737,6 +5908,8 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
                 goto fail;
         }
 
+        /* There are several dir indexes for this inode, clear the cache. */
+        BTRFS_I(inode)->dir_index = 0ULL;
         inc_nlink(inode);
         inode_inc_iversion(inode);
         inode->i_ctime = CURRENT_TIME;
@@ -6000,7 +6173,7 @@ again:
                        btrfs_file_extent_num_bytes(leaf, item);
         } else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
                 size_t size;
-                size = btrfs_file_extent_inline_len(leaf, item);
+                size = btrfs_file_extent_inline_len(leaf, path->slots[0], item);
                 extent_end = ALIGN(extent_start + size, root->sectorsize);
         }
 next:
@@ -6069,7 +6242,7 @@ next:
                         goto out;
                 }
 
-                size = btrfs_file_extent_inline_len(leaf, item);
+                size = btrfs_file_extent_inline_len(leaf, path->slots[0], item);
                 extent_offset = page_offset(page) + pg_offset - extent_start;
                 copy_size = min_t(u64, PAGE_CACHE_SIZE - pg_offset,
                                 size - extent_offset);
@@ -6386,6 +6559,7 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
         int slot;
         int found_type;
         bool nocow = (BTRFS_I(inode)->flags & BTRFS_INODE_NODATACOW);
+
         path = btrfs_alloc_path();
         if (!path)
                 return -ENOMEM;
@@ -6429,6 +6603,10 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
         if (!nocow && found_type == BTRFS_FILE_EXTENT_REG)
                 goto out;
 
+        extent_end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);
+        if (extent_end <= offset)
+                goto out;
+
         disk_bytenr = btrfs_file_extent_disk_bytenr(leaf, fi);
         if (disk_bytenr == 0)
                 goto out;
@@ -6446,8 +6624,6 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
                 *ram_bytes = btrfs_file_extent_ram_bytes(leaf, fi);
         }
 
-        extent_end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);
-
         if (btrfs_extent_readonly(root, disk_bytenr))
                 goto out;
         btrfs_release_path(path);
@@ -6779,17 +6955,16 @@ unlock_err:
 static void btrfs_endio_direct_read(struct bio *bio, int err)
 {
         struct btrfs_dio_private *dip = bio->bi_private;
-        struct bio_vec *bvec_end = bio->bi_io_vec + bio->bi_vcnt - 1;
-        struct bio_vec *bvec = bio->bi_io_vec;
+        struct bio_vec *bvec;
         struct inode *inode = dip->inode;
         struct btrfs_root *root = BTRFS_I(inode)->root;
         struct bio *dio_bio;
         u32 *csums = (u32 *)dip->csum;
-        int index = 0;
         u64 start;
+        int i;
 
         start = dip->logical_offset;
-        do {
+        bio_for_each_segment_all(bvec, bio, i) {
                 if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) {
                         struct page *page = bvec->bv_page;
                         char *kaddr;
@@ -6805,18 +6980,16 @@ static void btrfs_endio_direct_read(struct bio *bio, int err)
                         local_irq_restore(flags);
 
                         flush_dcache_page(bvec->bv_page);
-                        if (csum != csums[index]) {
+                        if (csum != csums[i]) {
                                 btrfs_err(root->fs_info, "csum failed ino %llu off %llu csum %u expected csum %u",
                                           btrfs_ino(inode), start, csum,
-                                          csums[index]);
+                                          csums[i]);
                                 err = -EIO;
                         }
                 }
 
                 start += bvec->bv_len;
-                bvec++;
-                index++;
-        } while (bvec <= bvec_end);
+        }
 
         unlock_extent(&BTRFS_I(inode)->io_tree, dip->logical_offset,
                       dip->logical_offset + dip->bytes - 1);
@@ -6894,10 +7067,11 @@ static void btrfs_end_dio_bio(struct bio *bio, int err)
         struct btrfs_dio_private *dip = bio->bi_private;
 
         if (err) {
-                printk(KERN_ERR "btrfs direct IO failed ino %llu rw %lu "
-                      "sector %#Lx len %u err no %d\n",
+                btrfs_err(BTRFS_I(dip->inode)->root->fs_info,
+                          "direct IO failed ino %llu rw %lu sector %#Lx len %u err no %d",
                       btrfs_ino(dip->inode), bio->bi_rw,
-                      (unsigned long long)bio->bi_sector, bio->bi_size, err);
+                      (unsigned long long)bio->bi_iter.bi_sector,
+                      bio->bi_iter.bi_size, err);
                 dip->errors = 1;
 
                 /*
@@ -6988,7 +7162,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
         struct bio *bio;
         struct bio *orig_bio = dip->orig_bio;
         struct bio_vec *bvec = orig_bio->bi_io_vec;
-        u64 start_sector = orig_bio->bi_sector;
+        u64 start_sector = orig_bio->bi_iter.bi_sector;
         u64 file_offset = dip->logical_offset;
         u64 submit_len = 0;
         u64 map_length;
@@ -6996,7 +7170,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
         int ret = 0;
         int async_submit = 0;
 
-        map_length = orig_bio->bi_size;
+        map_length = orig_bio->bi_iter.bi_size;
         ret = btrfs_map_block(root->fs_info, rw, start_sector << 9,
                               &map_length, NULL, 0);
         if (ret) {
@@ -7004,7 +7178,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
                 return -EIO;
         }
 
-        if (map_length >= orig_bio->bi_size) {
+        if (map_length >= orig_bio->bi_iter.bi_size) {
                 bio = orig_bio;
                 goto submit;
         }
@@ -7056,7 +7230,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
                         bio->bi_private = dip;
                         bio->bi_end_io = btrfs_end_dio_bio;
 
-                        map_length = orig_bio->bi_size;
+                        map_length = orig_bio->bi_iter.bi_size;
                         ret = btrfs_map_block(root->fs_info, rw,
                                               start_sector << 9,
                                               &map_length, NULL, 0);
@@ -7114,7 +7288,8 @@ static void btrfs_submit_direct(int rw, struct bio *dio_bio,
 
         if (!skip_sum && !write) {
                 csum_size = btrfs_super_csum_size(root->fs_info->super_copy);
-                sum_len = dio_bio->bi_size >> inode->i_sb->s_blocksize_bits;
+                sum_len = dio_bio->bi_iter.bi_size >>
+                        inode->i_sb->s_blocksize_bits;
                 sum_len *= csum_size;
         } else {
                 sum_len = 0;
@@ -7129,8 +7304,8 @@ static void btrfs_submit_direct(int rw, struct bio *dio_bio,
         dip->private = dio_bio->bi_private;
         dip->inode = inode;
         dip->logical_offset = file_offset;
-        dip->bytes = dio_bio->bi_size;
-        dip->disk_bytenr = (u64)dio_bio->bi_sector << 9;
+        dip->bytes = dio_bio->bi_iter.bi_size;
+        dip->disk_bytenr = (u64)dio_bio->bi_iter.bi_sector << 9;
         io_bio->bi_private = dip;
         dip->errors = 0;
         dip->orig_bio = io_bio;
@@ -7367,6 +7542,7 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
         struct extent_state *cached_state = NULL;
         u64 page_start = page_offset(page);
         u64 page_end = page_start + PAGE_CACHE_SIZE - 1;
+        int inode_evicting = inode->i_state & I_FREEING;
 
         /*
          * we have the page locked, so new writeback can't start,
@@ -7382,17 +7558,21 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
                 btrfs_releasepage(page, GFP_NOFS);
                 return;
         }
-        lock_extent_bits(tree, page_start, page_end, 0, &cached_state);
-        ordered = btrfs_lookup_ordered_extent(inode, page_offset(page));
+
+        if (!inode_evicting)
+                lock_extent_bits(tree, page_start, page_end, 0, &cached_state);
+        ordered = btrfs_lookup_ordered_extent(inode, page_start);
         if (ordered) {
                 /*
                  * IO on this page will never be started, so we need
                  * to account for any ordered extents now
                  */
-                clear_extent_bit(tree, page_start, page_end,
-                                 EXTENT_DIRTY | EXTENT_DELALLOC |
-                                 EXTENT_LOCKED | EXTENT_DO_ACCOUNTING |
-                                 EXTENT_DEFRAG, 1, 0, &cached_state, GFP_NOFS);
+                if (!inode_evicting)
+                        clear_extent_bit(tree, page_start, page_end,
+                                         EXTENT_DIRTY | EXTENT_DELALLOC |
+                                         EXTENT_LOCKED | EXTENT_DO_ACCOUNTING |
+                                         EXTENT_DEFRAG, 1, 0, &cached_state,
+                                         GFP_NOFS);
                 /*
                  * whoever cleared the private bit is responsible
                  * for the finish_ordered_io
@@ -7416,14 +7596,22 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
                                 btrfs_finish_ordered_io(ordered);
                 }
                 btrfs_put_ordered_extent(ordered);
-                cached_state = NULL;
-                lock_extent_bits(tree, page_start, page_end, 0, &cached_state);
+                if (!inode_evicting) {
+                        cached_state = NULL;
+                        lock_extent_bits(tree, page_start, page_end, 0,
+                                         &cached_state);
+                }
+        }
+
+        if (!inode_evicting) {
+                clear_extent_bit(tree, page_start, page_end,
+                                 EXTENT_LOCKED | EXTENT_DIRTY |
+                                 EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING |
+                                 EXTENT_DEFRAG, 1, 1,
+                                 &cached_state, GFP_NOFS);
+
+                __btrfs_releasepage(page, GFP_NOFS);
         }
-        clear_extent_bit(tree, page_start, page_end,
-                 EXTENT_LOCKED | EXTENT_DIRTY | EXTENT_DELALLOC |
-                 EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 1, 1,
-                 &cached_state, GFP_NOFS);
-        __btrfs_releasepage(page, GFP_NOFS);
 
         ClearPageChecked(page);
         if (PagePrivate(page)) {
@@ -7733,7 +7921,9 @@ out:
  * create a new subvolume directory/inode (helper for the ioctl).
  */
 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
-                             struct btrfs_root *new_root, u64 new_dirid)
+                             struct btrfs_root *new_root,
+                             struct btrfs_root *parent_root,
+                             u64 new_dirid)
 {
         struct inode *inode;
         int err;
@@ -7751,6 +7941,12 @@ int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
         set_nlink(inode, 1);
         btrfs_i_size_write(inode, 0);
 
+        err = btrfs_subvol_inherit_props(trans, new_root, parent_root);
+        if (err)
+                btrfs_err(new_root->fs_info,
+                          "error inheriting subvolume %llu properties: %d\n",
+                          new_root->root_key.objectid, err);
+
         err = btrfs_update_inode(trans, new_root, inode);
 
         iput(inode);
@@ -7776,6 +7972,7 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
         ei->flags = 0;
         ei->csum_bytes = 0;
         ei->index_cnt = (u64)-1;
+        ei->dir_index = 0;
         ei->last_unlink_trans = 0;
         ei->last_log_commit = 0;
 
@@ -8063,6 +8260,7 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         if (ret)
                 goto out_fail;
 
+        BTRFS_I(old_inode)->dir_index = 0ULL;
         if (unlikely(old_ino == BTRFS_FIRST_FREE_OBJECTID)) {
                 /* force full log commit if subvolume involved. */
                 root->fs_info->last_trans_log_full_commit = trans->transid;
@@ -8151,6 +8349,9 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                 goto out_fail;
         }
 
+        if (old_inode->i_nlink == 1)
+                BTRFS_I(old_inode)->dir_index = index;
+
         if (old_ino != BTRFS_FIRST_FREE_OBJECTID) {
                 struct dentry *parent = new_dentry->d_parent;
                 btrfs_log_new_name(trans, old_inode, old_dir, parent);
@@ -8286,7 +8487,7 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
 {
         int ret;
 
-        if (root->fs_info->sb->s_flags & MS_RDONLY)
+        if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state))
                 return -EROFS;
 
         ret = __start_delalloc_inodes(root, delay_iput);
@@ -8312,7 +8513,7 @@ int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput)
         struct list_head splice;
         int ret;
 
-        if (fs_info->sb->s_flags & MS_RDONLY)
+        if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state))
                 return -EROFS;
 
         INIT_LIST_HEAD(&splice);
@@ -8649,12 +8850,14 @@ static const struct inode_operations btrfs_dir_inode_operations = {
         .removexattr    = btrfs_removexattr,
         .permission     = btrfs_permission,
         .get_acl        = btrfs_get_acl,
+        .set_acl        = btrfs_set_acl,
         .update_time    = btrfs_update_time,
 };
 static const struct inode_operations btrfs_dir_ro_inode_operations = {
         .lookup         = btrfs_lookup,
         .permission     = btrfs_permission,
         .get_acl        = btrfs_get_acl,
+        .set_acl        = btrfs_set_acl,
         .update_time    = btrfs_update_time,
 };
 
@@ -8724,6 +8927,7 @@ static const struct inode_operations btrfs_file_inode_operations = {
         .permission     = btrfs_permission,
         .fiemap         = btrfs_fiemap,
         .get_acl        = btrfs_get_acl,
+        .set_acl        = btrfs_set_acl,
         .update_time    = btrfs_update_time,
 };
 static const struct inode_operations btrfs_special_inode_operations = {
@@ -8735,6 +8939,7 @@ static const struct inode_operations btrfs_special_inode_operations = {
         .listxattr      = btrfs_listxattr,
         .removexattr    = btrfs_removexattr,
         .get_acl        = btrfs_get_acl,
+        .set_acl        = btrfs_set_acl,
         .update_time    = btrfs_update_time,
 };
 static const struct inode_operations btrfs_symlink_inode_operations = {
@@ -8748,7 +8953,6 @@ static const struct inode_operations btrfs_symlink_inode_operations = {
         .getxattr       = btrfs_getxattr,
         .listxattr      = btrfs_listxattr,
         .removexattr    = btrfs_removexattr,
-        .get_acl        = btrfs_get_acl,
         .update_time    = btrfs_update_time,
 };