diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index e916c1e..4c73245 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -243,3 +243,11 @@
 		 - Del: echo '[h/c]!extension' > /sys/fs/f2fs/<disk>/extension_list
 		 - [h] means add/del hot file extension
 		 - [c] means add/del cold file extension
+
+What:		/sys/fs/f2fs/<disk>/unusable
+Date		April 2019
+Contact:	"Daniel Rosenberg" <drosen@google.com>
+Description:
+		If checkpoint=disable, it displays the number of blocks that are unusable.
+                If checkpoint=enable it displays the enumber of blocks that would be unusable
+                if checkpoint=disable were to be set.
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index 564ccc6..c2e9413 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -214,11 +214,22 @@
                        non-atomic files likewise "nobarrier" mount option.
 test_dummy_encryption  Enable dummy encryption, which provides a fake fscrypt
                        context. The fake fscrypt context is used by xfstests.
-checkpoint=%s          Set to "disable" to turn off checkpointing. Set to "enable"
+checkpoint=%s[:%u[%]]     Set to "disable" to turn off checkpointing. Set to "enable"
                        to reenable checkpointing. Is enabled by default. While
                        disabled, any unmounting or unexpected shutdowns will cause
                        the filesystem contents to appear as they did when the
                        filesystem was mounted with that option.
+                       While mounting with checkpoint=disabled, the filesystem must
+                       run garbage collection to ensure that all available space can
+                       be used. If this takes too much time, the mount may return
+                       EAGAIN. You may optionally add a value to indicate how much
+                       of the disk you would be willing to temporarily give up to
+                       avoid additional garbage collection. This can be given as a
+                       number of blocks, or as a percent. For instance, mounting
+                       with checkpoint=disable:100% would always succeed, but it may
+                       hide up to all remaining free space. The actual space that
+                       would be unusable can be viewed at /sys/fs/f2fs/<disk>/unusable
+                       This space is reclaimed once checkpoint=enable.
 
 ================================================================================
 DEBUGFS ENTRIES
@@ -246,11 +257,14 @@
 ..............................................................................
  File                         Content
 
- gc_max_sleep_time            This tuning parameter controls the maximum sleep
+ gc_urgent_sleep_time         This parameter controls sleep time for gc_urgent.
+                              500 ms is set by default. See above gc_urgent.
+
+ gc_min_sleep_time            This tuning parameter controls the minimum sleep
                               time for the garbage collection thread. Time is
                               in milliseconds.
 
- gc_min_sleep_time            This tuning parameter controls the minimum sleep
+ gc_max_sleep_time            This tuning parameter controls the maximum sleep
                               time for the garbage collection thread. Time is
                               in milliseconds.
 
@@ -270,9 +284,6 @@
                               to 1, background thread starts to do GC by given
                               gc_urgent_sleep_time interval.
 
- gc_urgent_sleep_time         This parameter controls sleep time for gc_urgent.
-                              500 ms is set by default. See above gc_urgent.
-
  reclaim_segments             This parameter controls the number of prefree
                               segments to be reclaimed. If the number of prefree
 			      segments is larger than the number of segments
@@ -287,7 +298,16 @@
 			      checkpoint is triggered, and issued during the
 			      checkpoint. By default, it is disabled with 0.
 
- trim_sections                This parameter controls the number of sections
+ discard_granularity	      This parameter controls the granularity of discard
+			      command size. It will issue discard commands iif
+			      the size is larger than given granularity. Its
+			      unit size is 4KB, and 4 (=16KB) is set by default.
+			      The maximum value is 128 (=512KB).
+
+ reserved_blocks	      This parameter indicates the number of blocks that
+			      f2fs reserves internally for root.
+
+ batched_trim_sections	      This parameter controls the number of sections
                               to be trimmed out in batch mode when FITRIM
                               conducts. 32 sections is set by default.
 
@@ -309,11 +329,35 @@
 			      the number is less than this value, it triggers
 			      in-place-updates.
 
+ min_seq_blocks		      This parameter controls the threshold to serialize
+			      write IOs issued by multiple threads in parallel.
+
+ min_hot_blocks		      This parameter controls the threshold to allocate
+			      a hot data log for pending data blocks to write.
+
+ min_ssr_sections	      This parameter adds the threshold when deciding
+			      SSR block allocation. If this is large, SSR mode
+			      will be enabled early.
+
+ ram_thresh                   This parameter controls the memory footprint used
+			      by free nids and cached nat entries. By default,
+			      10 is set, which indicates 10 MB / 1 GB RAM.
+
+ ra_nid_pages		      When building free nids, F2FS reads NAT blocks
+			      ahead for speed up. Default is 0.
+
+ dirty_nats_ratio	      Given dirty ratio of cached nat entries, F2FS
+			      determines flushing them in background.
+
  max_victim_search	      This parameter controls the number of trials to
 			      find a victim segment when conducting SSR and
 			      cleaning operations. The default value is 4096
 			      which covers 8GB block address range.
 
+ migration_granularity	      For large-sized sections, F2FS can stop GC given
+			      this granularity instead of reclaiming entire
+			      section.
+
  dir_level                    This parameter controls the directory level to
 			      support large directory. If a directory has a
 			      number of files, it can reduce the file lookup
@@ -321,9 +365,53 @@
 			      Otherwise, it needs to decrease this value to
 			      reduce the space overhead. The default value is 0.
 
- ram_thresh                   This parameter controls the memory footprint used
-			      by free nids and cached nat entries. By default,
-			      10 is set, which indicates 10 MB / 1 GB RAM.
+ cp_interval		      F2FS tries to do checkpoint periodically, 60 secs
+			      by default.
+
+ idle_interval		      F2FS detects system is idle, if there's no F2FS
+			      operations during given interval, 5 secs by
+			      default.
+
+ discard_idle_interval	      F2FS detects the discard thread is idle, given
+			      time interval. Default is 5 secs.
+
+ gc_idle_interval	      F2FS detects the GC thread is idle, given time
+			      interval. Default is 5 secs.
+
+ umount_discard_timeout       When unmounting the disk, F2FS waits for finishing
+			      queued discard commands which can take huge time.
+			      This gives time out for it, 5 secs by default.
+
+ iostat_enable		      This controls to enable/disable iostat in F2FS.
+
+ readdir_ra		      This enables/disabled readahead of inode blocks
+			      in readdir, and default is enabled.
+
+ gc_pin_file_thresh	      This indicates how many GC can be failed for the
+			      pinned file. If it exceeds this, F2FS doesn't
+			      guarantee its pinning state. 2048 trials is set
+			      by default.
+
+ extension_list		      This enables to change extension_list for hot/cold
+			      files in runtime.
+
+ inject_rate		      This controls injection rate of arbitrary faults.
+
+ inject_type		      This controls injection type of arbitrary faults.
+
+ dirty_segments 	      This shows # of dirty segments.
+
+ lifetime_write_kbytes	      This shows # of data written to the disk.
+
+ features		      This shows current features enabled on F2FS.
+
+ current_reserved_blocks      This shows # of blocks currently reserved.
+
+ unusable                     If checkpoint=disable, this shows the number of
+                              blocks that are unusable.
+                              If checkpoint=enable it shows the number of blocks
+                              that would be unusable if checkpoint=disable were
+                              to be set.
 
 ================================================================================
 USAGE
@@ -656,3 +744,28 @@
 In order to identify whether the data in the victim segment are valid or not,
 F2FS manages a bitmap. Each bit represents the validity of a block, and the
 bitmap is composed of a bit stream covering whole blocks in main area.
+
+Fallocate(2) Policy
+-------------------
+
+The default policy follows the below posix rule.
+
+Allocating disk space
+    The default operation (i.e., mode is zero) of fallocate() allocates
+    the disk space within the range specified by offset and len.  The
+    file size (as reported by stat(2)) will be changed if offset+len is
+    greater than the file size.  Any subregion within the range specified
+    by offset and len that did not contain data before the call will be
+    initialized to zero.  This default behavior closely resembles the
+    behavior of the posix_fallocate(3) library function, and is intended
+    as a method of optimally implementing that function.
+
+However, once F2FS receives ioctl(fd, F2FS_IOC_SET_PIN_FILE) in prior to
+fallocate(fd, DEFAULT_MODE), it allocates on-disk blocks addressess having
+zero or random data, which is useful to the below scenario where:
+ 1. create(fd)
+ 2. ioctl(fd, F2FS_IOC_SET_PIN_FILE)
+ 3. fallocate(fd, 0, 0, size)
+ 4. address = fibmap(fd, offset)
+ 5. open(blkdev)
+ 6. write(blkdev, address)
diff --git a/fs/crypto/bio.c b/fs/crypto/bio.c
index d7b4c48..44c0f94 100644
--- a/fs/crypto/bio.c
+++ b/fs/crypto/bio.c
@@ -35,12 +35,10 @@
 		int ret = fscrypt_decrypt_page(page->mapping->host, page,
 				PAGE_SIZE, 0, page->index);
 
-		if (ret) {
-			WARN_ON_ONCE(1);
+		if (ret)
 			SetPageError(page);
-		} else if (done) {
+		else if (done)
 			SetPageUptodate(page);
-		}
 		if (done)
 			unlock_page(page);
 	}
@@ -102,7 +100,7 @@
 
 	BUG_ON(inode->i_sb->s_blocksize != PAGE_SIZE);
 
-	ctx = fscrypt_get_ctx(inode, GFP_NOFS);
+	ctx = fscrypt_get_ctx(GFP_NOFS);
 	if (IS_ERR(ctx))
 		return PTR_ERR(ctx);
 
diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c
index 4dc788e..68e2ca4 100644
--- a/fs/crypto/crypto.c
+++ b/fs/crypto/crypto.c
@@ -87,23 +87,17 @@
 
 /**
  * fscrypt_get_ctx() - Gets an encryption context
- * @inode:       The inode for which we are doing the crypto
  * @gfp_flags:   The gfp flag for memory allocation
  *
  * Allocates and initializes an encryption context.
  *
- * Return: An allocated and initialized encryption context on success; error
- * value or NULL otherwise.
+ * Return: A new encryption context on success; an ERR_PTR() otherwise.
  */
-struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *inode, gfp_t gfp_flags)
+struct fscrypt_ctx *fscrypt_get_ctx(gfp_t gfp_flags)
 {
-	struct fscrypt_ctx *ctx = NULL;
-	struct fscrypt_info *ci = inode->i_crypt_info;
+	struct fscrypt_ctx *ctx;
 	unsigned long flags;
 
-	if (ci == NULL)
-		return ERR_PTR(-ENOKEY);
-
 	/*
 	 * We first try getting the ctx from a free list because in
 	 * the common case the ctx will have an allocated and
@@ -258,9 +252,9 @@
 
 	BUG_ON(!PageLocked(page));
 
-	ctx = fscrypt_get_ctx(inode, gfp_flags);
+	ctx = fscrypt_get_ctx(gfp_flags);
 	if (IS_ERR(ctx))
-		return (struct page *)ctx;
+		return ERR_CAST(ctx);
 
 	/* The encryption operation will require a bounce page. */
 	ciphertext_page = fscrypt_alloc_bounce_page(ctx, gfp_flags);
@@ -313,45 +307,47 @@
 EXPORT_SYMBOL(fscrypt_decrypt_page);
 
 /*
- * Validate dentries for encrypted directories to make sure we aren't
- * potentially caching stale data after a key has been added or
- * removed.
+ * Validate dentries in encrypted directories to make sure we aren't potentially
+ * caching stale dentries after a key has been added.
  */
 static int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
 {
 	struct dentry *dir;
-	int dir_has_key, cached_with_key;
+	int err;
+	int valid;
+
+	/*
+	 * Plaintext names are always valid, since fscrypt doesn't support
+	 * reverting to ciphertext names without evicting the directory's inode
+	 * -- which implies eviction of the dentries in the directory.
+	 */
+	if (!(dentry->d_flags & DCACHE_ENCRYPTED_NAME))
+		return 1;
+
+	/*
+	 * Ciphertext name; valid if the directory's key is still unavailable.
+	 *
+	 * Although fscrypt forbids rename() on ciphertext names, we still must
+	 * use dget_parent() here rather than use ->d_parent directly.  That's
+	 * because a corrupted fs image may contain directory hard links, which
+	 * the VFS handles by moving the directory's dentry tree in the dcache
+	 * each time ->lookup() finds the directory and it already has a dentry
+	 * elsewhere.  Thus ->d_parent can be changing, and we must safely grab
+	 * a reference to some ->d_parent to prevent it from being freed.
+	 */
 
 	if (flags & LOOKUP_RCU)
 		return -ECHILD;
 
 	dir = dget_parent(dentry);
-	if (!IS_ENCRYPTED(d_inode(dir))) {
-		dput(dir);
-		return 0;
-	}
-
-	spin_lock(&dentry->d_lock);
-	cached_with_key = dentry->d_flags & DCACHE_ENCRYPTED_WITH_KEY;
-	spin_unlock(&dentry->d_lock);
-	dir_has_key = (d_inode(dir)->i_crypt_info != NULL);
+	err = fscrypt_get_encryption_info(d_inode(dir));
+	valid = !fscrypt_has_encryption_key(d_inode(dir));
 	dput(dir);
 
-	/*
-	 * If the dentry was cached without the key, and it is a
-	 * negative dentry, it might be a valid name.  We can't check
-	 * if the key has since been made available due to locking
-	 * reasons, so we fail the validation so ext4_lookup() can do
-	 * this check.
-	 *
-	 * We also fail the validation if the dentry was created with
-	 * the key present, but we no longer have the key, or vice versa.
-	 */
-	if ((!cached_with_key && d_is_negative(dentry)) ||
-			(!cached_with_key && dir_has_key) ||
-			(cached_with_key && !dir_has_key))
-		return 0;
-	return 1;
+	if (err < 0)
+		return err;
+
+	return valid;
 }
 
 const struct dentry_operations fscrypt_d_ops = {
diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c
index 217d421..019247b 100644
--- a/fs/crypto/fname.c
+++ b/fs/crypto/fname.c
@@ -268,7 +268,7 @@
 	if (iname->len < FS_CRYPTO_BLOCK_SIZE)
 		return -EUCLEAN;
 
-	if (inode->i_crypt_info)
+	if (fscrypt_has_encryption_key(inode))
 		return fname_decrypt(inode, iname, oname);
 
 	if (iname->len <= FSCRYPT_FNAME_MAX_UNDIGESTED_SIZE) {
@@ -335,7 +335,7 @@
 	if (ret)
 		return ret;
 
-	if (dir->i_crypt_info) {
+	if (fscrypt_has_encryption_key(dir)) {
 		if (!fscrypt_fname_encrypted_size(dir, iname->len,
 						  dir->i_sb->s_cop->max_namelen,
 						  &fname->crypto_buf.len))
@@ -355,6 +355,7 @@
 	}
 	if (!lookup)
 		return -ENOKEY;
+	fname->is_ciphertext_name = true;
 
 	/*
 	 * We don't have the key and we are doing a lookup; decode the
diff --git a/fs/crypto/hooks.c b/fs/crypto/hooks.c
index 56debb1..2dc2254 100644
--- a/fs/crypto/hooks.c
+++ b/fs/crypto/hooks.c
@@ -49,7 +49,8 @@
 }
 EXPORT_SYMBOL_GPL(fscrypt_file_open);
 
-int __fscrypt_prepare_link(struct inode *inode, struct inode *dir)
+int __fscrypt_prepare_link(struct inode *inode, struct inode *dir,
+			   struct dentry *dentry)
 {
 	int err;
 
@@ -57,6 +58,10 @@
 	if (err)
 		return err;
 
+	/* ... in case we looked up ciphertext name before key was added */
+	if (dentry->d_flags & DCACHE_ENCRYPTED_NAME)
+		return -ENOKEY;
+
 	if (!fscrypt_has_permitted_context(dir, inode))
 		return -EXDEV;
 
@@ -78,6 +83,11 @@
 	if (err)
 		return err;
 
+	/* ... in case we looked up ciphertext name(s) before key was added */
+	if ((old_dentry->d_flags | new_dentry->d_flags) &
+	    DCACHE_ENCRYPTED_NAME)
+		return -ENOKEY;
+
 	if (old_dir != new_dir) {
 		if (IS_ENCRYPTED(new_dir) &&
 		    !fscrypt_has_permitted_context(new_dir,
@@ -94,21 +104,21 @@
 }
 EXPORT_SYMBOL_GPL(__fscrypt_prepare_rename);
 
-int __fscrypt_prepare_lookup(struct inode *dir, struct dentry *dentry)
+int __fscrypt_prepare_lookup(struct inode *dir, struct dentry *dentry,
+			     struct fscrypt_name *fname)
 {
-	int err = fscrypt_get_encryption_info(dir);
+	int err = fscrypt_setup_filename(dir, &dentry->d_name, 1, fname);
 
-	if (err)
+	if (err && err != -ENOENT)
 		return err;
 
-	if (fscrypt_has_encryption_key(dir)) {
+	if (fname->is_ciphertext_name) {
 		spin_lock(&dentry->d_lock);
-		dentry->d_flags |= DCACHE_ENCRYPTED_WITH_KEY;
+		dentry->d_flags |= DCACHE_ENCRYPTED_NAME;
 		spin_unlock(&dentry->d_lock);
+		d_set_d_op(dentry, &fscrypt_d_ops);
 	}
-
-	d_set_d_op(dentry, &fscrypt_d_ops);
-	return 0;
+	return err;
 }
 EXPORT_SYMBOL_GPL(__fscrypt_prepare_lookup);
 
@@ -179,11 +189,9 @@
 	sd->len = cpu_to_le16(ciphertext_len);
 
 	err = fname_encrypt(inode, &iname, sd->encrypted_path, ciphertext_len);
-	if (err) {
-		if (!disk_link->name)
-			kfree(sd);
-		return err;
-	}
+	if (err)
+		goto err_free_sd;
+
 	/*
 	 * Null-terminating the ciphertext doesn't make sense, but we still
 	 * count the null terminator in the length, so we might as well
@@ -191,9 +199,20 @@
 	 */
 	sd->encrypted_path[ciphertext_len] = '\0';
 
+	/* Cache the plaintext symlink target for later use by get_link() */
+	err = -ENOMEM;
+	inode->i_link = kmemdup(target, len + 1, GFP_NOFS);
+	if (!inode->i_link)
+		goto err_free_sd;
+
 	if (!disk_link->name)
 		disk_link->name = (unsigned char *)sd;
 	return 0;
+
+err_free_sd:
+	if (!disk_link->name)
+		kfree(sd);
+	return err;
 }
 EXPORT_SYMBOL_GPL(__fscrypt_encrypt_symlink);
 
@@ -202,7 +221,7 @@
  * @inode: the symlink inode
  * @caddr: the on-disk contents of the symlink
  * @max_size: size of @caddr buffer
- * @done: if successful, will be set up to free the returned target
+ * @done: if successful, will be set up to free the returned target if needed
  *
  * If the symlink's encryption key is available, we decrypt its target.
  * Otherwise, we encode its target for presentation.
@@ -217,12 +236,18 @@
 {
 	const struct fscrypt_symlink_data *sd;
 	struct fscrypt_str cstr, pstr;
+	bool has_key;
 	int err;
 
 	/* This is for encrypted symlinks only */
 	if (WARN_ON(!IS_ENCRYPTED(inode)))
 		return ERR_PTR(-EINVAL);
 
+	/* If the decrypted target is already cached, just return it. */
+	pstr.name = READ_ONCE(inode->i_link);
+	if (pstr.name)
+		return pstr.name;
+
 	/*
 	 * Try to set up the symlink's encryption key, but we can continue
 	 * regardless of whether the key is available or not.
@@ -230,6 +255,7 @@
 	err = fscrypt_get_encryption_info(inode);
 	if (err)
 		return ERR_PTR(err);
+	has_key = fscrypt_has_encryption_key(inode);
 
 	/*
 	 * For historical reasons, encrypted symlink targets are prefixed with
@@ -261,7 +287,17 @@
 		goto err_kfree;
 
 	pstr.name[pstr.len] = '\0';
-	set_delayed_call(done, kfree_link, pstr.name);
+
+	/*
+	 * Cache decrypted symlink targets in i_link for later use.  Don't cache
+	 * symlink targets encoded without the key, since those become outdated
+	 * once the key is added.  This pairs with the READ_ONCE() above and in
+	 * the VFS path lookup code.
+	 */
+	if (!has_key ||
+	    cmpxchg_release(&inode->i_link, NULL, pstr.name) != NULL)
+		set_delayed_call(done, kfree_link, pstr.name);
+
 	return pstr.name;
 
 err_kfree:
diff --git a/fs/crypto/keyinfo.c b/fs/crypto/keyinfo.c
index 98472a4..37c58da 100644
--- a/fs/crypto/keyinfo.c
+++ b/fs/crypto/keyinfo.c
@@ -508,7 +508,7 @@
 	u8 *raw_key = NULL;
 	int res;
 
-	if (inode->i_crypt_info)
+	if (fscrypt_has_encryption_key(inode))
 		return 0;
 
 	res = fscrypt_initialize(inode->i_sb->s_cop->flags);
@@ -572,7 +572,7 @@
 	if (res)
 		goto out;
 
-	if (cmpxchg(&inode->i_crypt_info, NULL, crypt_info) == NULL)
+	if (cmpxchg_release(&inode->i_crypt_info, NULL, crypt_info) == NULL)
 		crypt_info = NULL;
 out:
 	if (res == -ENOKEY)
@@ -583,9 +583,30 @@
 }
 EXPORT_SYMBOL(fscrypt_get_encryption_info);
 
+/**
+ * fscrypt_put_encryption_info - free most of an inode's fscrypt data
+ *
+ * Free the inode's fscrypt_info.  Filesystems must call this when the inode is
+ * being evicted.  An RCU grace period need not have elapsed yet.
+ */
 void fscrypt_put_encryption_info(struct inode *inode)
 {
 	put_crypt_info(inode->i_crypt_info);
 	inode->i_crypt_info = NULL;
 }
 EXPORT_SYMBOL(fscrypt_put_encryption_info);
+
+/**
+ * fscrypt_free_inode - free an inode's fscrypt data requiring RCU delay
+ *
+ * Free the inode's cached decrypted symlink target, if any.  Filesystems must
+ * call this after an RCU grace period, just before they free the inode.
+ */
+void fscrypt_free_inode(struct inode *inode)
+{
+	if (IS_ENCRYPTED(inode) && S_ISLNK(inode->i_mode)) {
+		kfree(inode->i_link);
+		inode->i_link = NULL;
+	}
+}
+EXPORT_SYMBOL(fscrypt_free_inode);
diff --git a/fs/crypto/policy.c b/fs/crypto/policy.c
index e258a35..b7b8df9 100644
--- a/fs/crypto/policy.c
+++ b/fs/crypto/policy.c
@@ -197,8 +197,8 @@
 	res = fscrypt_get_encryption_info(child);
 	if (res)
 		return 0;
-	parent_ci = parent->i_crypt_info;
-	child_ci = child->i_crypt_info;
+	parent_ci = READ_ONCE(parent->i_crypt_info);
+	child_ci = READ_ONCE(child->i_crypt_info);
 
 	if (parent_ci && child_ci) {
 		return memcmp(parent_ci->ci_master_key_descriptor,
@@ -249,7 +249,7 @@
 	if (res < 0)
 		return res;
 
-	ci = parent->i_crypt_info;
+	ci = READ_ONCE(parent->i_crypt_info);
 	if (ci == NULL)
 		return -ENOKEY;
 
diff --git a/fs/dcache.c b/fs/dcache.c
index 426fe9b..3934c29 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -18,6 +18,7 @@
 #include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/fs.h>
+#include <linux/fscrypt.h>
 #include <linux/fsnotify.h>
 #include <linux/slab.h>
 #include <linux/init.h>
@@ -2878,6 +2879,7 @@
 			fsnotify_update_flags(target);
 		fsnotify_update_flags(dentry);
 	}
+	fscrypt_handle_d_move(dentry);
 
 	write_seqcount_end(&target->d_seq);
 	write_seqcount_end(&dentry->d_seq);
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 4a05615..335ea7b 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2263,23 +2263,47 @@
 ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
 
 #ifdef CONFIG_FS_ENCRYPTION
+static inline void ext4_fname_from_fscrypt_name(struct ext4_filename *dst,
+						const struct fscrypt_name *src)
+{
+	memset(dst, 0, sizeof(*dst));
+
+	dst->usr_fname = src->usr_fname;
+	dst->disk_name = src->disk_name;
+	dst->hinfo.hash = src->hash;
+	dst->hinfo.minor_hash = src->minor_hash;
+	dst->crypto_buf = src->crypto_buf;
+}
+
 static inline int ext4_fname_setup_filename(struct inode *dir,
-			const struct qstr *iname,
-			int lookup, struct ext4_filename *fname)
+					    const struct qstr *iname,
+					    int lookup,
+					    struct ext4_filename *fname)
 {
 	struct fscrypt_name name;
 	int err;
 
-	memset(fname, 0, sizeof(struct ext4_filename));
-
 	err = fscrypt_setup_filename(dir, iname, lookup, &name);
+	if (err)
+		return err;
 
-	fname->usr_fname = name.usr_fname;
-	fname->disk_name = name.disk_name;
-	fname->hinfo.hash = name.hash;
-	fname->hinfo.minor_hash = name.minor_hash;
-	fname->crypto_buf = name.crypto_buf;
-	return err;
+	ext4_fname_from_fscrypt_name(fname, &name);
+	return 0;
+}
+
+static inline int ext4_fname_prepare_lookup(struct inode *dir,
+					    struct dentry *dentry,
+					    struct ext4_filename *fname)
+{
+	struct fscrypt_name name;
+	int err;
+
+	err = fscrypt_prepare_lookup(dir, dentry, &name);
+	if (err)
+		return err;
+
+	ext4_fname_from_fscrypt_name(fname, &name);
+	return 0;
 }
 
 static inline void ext4_fname_free_filename(struct ext4_filename *fname)
@@ -2293,19 +2317,27 @@
 	fname->usr_fname = NULL;
 	fname->disk_name.name = NULL;
 }
-#else
+#else /* !CONFIG_FS_ENCRYPTION */
 static inline int ext4_fname_setup_filename(struct inode *dir,
-		const struct qstr *iname,
-		int lookup, struct ext4_filename *fname)
+					    const struct qstr *iname,
+					    int lookup,
+					    struct ext4_filename *fname)
 {
 	fname->usr_fname = iname;
 	fname->disk_name.name = (unsigned char *) iname->name;
 	fname->disk_name.len = iname->len;
 	return 0;
 }
-static inline void ext4_fname_free_filename(struct ext4_filename *fname) { }
 
-#endif
+static inline int ext4_fname_prepare_lookup(struct inode *dir,
+					    struct dentry *dentry,
+					    struct ext4_filename *fname)
+{
+	return ext4_fname_setup_filename(dir, &dentry->d_name, 1, fname);
+}
+
+static inline void ext4_fname_free_filename(struct ext4_filename *fname) { }
+#endif /* !CONFIG_FS_ENCRYPTION */
 
 /* dir.c */
 extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *,
@@ -2497,7 +2529,6 @@
 			   int buf_size,
 			   struct inode *dir,
 			   struct ext4_filename *fname,
-			   const struct qstr *d_name,
 			   unsigned int offset,
 			   struct ext4_dir_entry_2 **res_dir);
 extern int ext4_generic_delete_entry(handle_t *handle,
@@ -2981,7 +3012,6 @@
 				   int *has_inline_data);
 extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
 					struct ext4_filename *fname,
-					const struct qstr *d_name,
 					struct ext4_dir_entry_2 **res_dir,
 					int *has_inline_data);
 extern int ext4_delete_inline_entry(handle_t *handle,
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index ddb3dcf..f786e25 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1636,7 +1636,6 @@
 
 struct buffer_head *ext4_find_inline_entry(struct inode *dir,
 					struct ext4_filename *fname,
-					const struct qstr *d_name,
 					struct ext4_dir_entry_2 **res_dir,
 					int *has_inline_data)
 {
@@ -1658,7 +1657,7 @@
 						EXT4_INLINE_DOTDOT_SIZE;
 	inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE;
 	ret = ext4_search_dir(iloc.bh, inline_start, inline_size,
-			      dir, fname, d_name, 0, res_dir);
+			      dir, fname, 0, res_dir);
 	if (ret == 1)
 		goto out_find;
 	if (ret < 0)
@@ -1671,7 +1670,7 @@
 	inline_size = ext4_get_inline_size(dir) - EXT4_MIN_INLINE_DATA_SIZE;
 
 	ret = ext4_search_dir(iloc.bh, inline_start, inline_size,
-			      dir, fname, d_name, 0, res_dir);
+			      dir, fname, 0, res_dir);
 	if (ret == 1)
 		goto out_find;
 
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 6817a89..3491d48 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1156,12 +1156,11 @@
 static inline int search_dirblock(struct buffer_head *bh,
 				  struct inode *dir,
 				  struct ext4_filename *fname,
-				  const struct qstr *d_name,
 				  unsigned int offset,
 				  struct ext4_dir_entry_2 **res_dir)
 {
 	return ext4_search_dir(bh, bh->b_data, dir->i_sb->s_blocksize, dir,
-			       fname, d_name, offset, res_dir);
+			       fname, offset, res_dir);
 }
 
 /*
@@ -1263,7 +1262,6 @@
  */
 int ext4_search_dir(struct buffer_head *bh, char *search_buf, int buf_size,
 		    struct inode *dir, struct ext4_filename *fname,
-		    const struct qstr *d_name,
 		    unsigned int offset, struct ext4_dir_entry_2 **res_dir)
 {
 	struct ext4_dir_entry_2 * de;
@@ -1313,7 +1311,7 @@
 }
 
 /*
- *	ext4_find_entry()
+ *	__ext4_find_entry()
  *
  * finds an entry in the specified directory with the wanted name. It
  * returns the cache buffer in which the entry was found, and the entry
@@ -1323,16 +1321,16 @@
  * The returned buffer_head has ->b_count elevated.  The caller is expected
  * to brelse() it when appropriate.
  */
-static struct buffer_head * ext4_find_entry (struct inode *dir,
-					const struct qstr *d_name,
-					struct ext4_dir_entry_2 **res_dir,
-					int *inlined)
+static struct buffer_head *__ext4_find_entry(struct inode *dir,
+					     struct ext4_filename *fname,
+					     struct ext4_dir_entry_2 **res_dir,
+					     int *inlined)
 {
 	struct super_block *sb;
 	struct buffer_head *bh_use[NAMEI_RA_SIZE];
 	struct buffer_head *bh, *ret = NULL;
 	ext4_lblk_t start, block, b;
-	const u8 *name = d_name->name;
+	const u8 *name = fname->usr_fname->name;
 	int ra_max = 0;		/* Number of bh's in the readahead
 				   buffer, bh_use[] */
 	int ra_ptr = 0;		/* Current index into readahead
@@ -1340,23 +1338,16 @@
 	int num = 0;
 	ext4_lblk_t  nblocks;
 	int i, namelen, retval;
-	struct ext4_filename fname;
 
 	*res_dir = NULL;
 	sb = dir->i_sb;
-	namelen = d_name->len;
+	namelen = fname->usr_fname->len;
 	if (namelen > EXT4_NAME_LEN)
 		return NULL;
 
-	retval = ext4_fname_setup_filename(dir, d_name, 1, &fname);
-	if (retval == -ENOENT)
-		return NULL;
-	if (retval)
-		return ERR_PTR(retval);
-
 	if (ext4_has_inline_data(dir)) {
 		int has_inline_data = 1;
-		ret = ext4_find_inline_entry(dir, &fname, d_name, res_dir,
+		ret = ext4_find_inline_entry(dir, fname, res_dir,
 					     &has_inline_data);
 		if (has_inline_data) {
 			if (inlined)
@@ -1376,7 +1367,7 @@
 		goto restart;
 	}
 	if (is_dx(dir)) {
-		ret = ext4_dx_find_entry(dir, &fname, res_dir);
+		ret = ext4_dx_find_entry(dir, fname, res_dir);
 		/*
 		 * On success, or if the error was file not found,
 		 * return.  Otherwise, fall back to doing a search the
@@ -1453,7 +1444,7 @@
 			goto next;
 		}
 		set_buffer_verified(bh);
-		i = search_dirblock(bh, dir, &fname, d_name,
+		i = search_dirblock(bh, dir, fname,
 			    block << EXT4_BLOCK_SIZE_BITS(sb), res_dir);
 		if (i == 1) {
 			EXT4_I(dir)->i_dir_start_lookup = block;
@@ -1484,17 +1475,56 @@
 	/* Clean up the read-ahead blocks */
 	for (; ra_ptr < ra_max; ra_ptr++)
 		brelse(bh_use[ra_ptr]);
-	ext4_fname_free_filename(&fname);
 	return ret;
 }
 
+static struct buffer_head *ext4_find_entry(struct inode *dir,
+					   const struct qstr *d_name,
+					   struct ext4_dir_entry_2 **res_dir,
+					   int *inlined)
+{
+	int err;
+	struct ext4_filename fname;
+	struct buffer_head *bh;
+
+	err = ext4_fname_setup_filename(dir, d_name, 1, &fname);
+	if (err == -ENOENT)
+		return NULL;
+	if (err)
+		return ERR_PTR(err);
+
+	bh = __ext4_find_entry(dir, &fname, res_dir, inlined);
+
+	ext4_fname_free_filename(&fname);
+	return bh;
+}
+
+static struct buffer_head *ext4_lookup_entry(struct inode *dir,
+					     struct dentry *dentry,
+					     struct ext4_dir_entry_2 **res_dir)
+{
+	int err;
+	struct ext4_filename fname;
+	struct buffer_head *bh;
+
+	err = ext4_fname_prepare_lookup(dir, dentry, &fname);
+	if (err == -ENOENT)
+		return NULL;
+	if (err)
+		return ERR_PTR(err);
+
+	bh = __ext4_find_entry(dir, &fname, res_dir, NULL);
+
+	ext4_fname_free_filename(&fname);
+	return bh;
+}
+
 static struct buffer_head * ext4_dx_find_entry(struct inode *dir,
 			struct ext4_filename *fname,
 			struct ext4_dir_entry_2 **res_dir)
 {
 	struct super_block * sb = dir->i_sb;
 	struct dx_frame frames[2], *frame;
-	const struct qstr *d_name = fname->usr_fname;
 	struct buffer_head *bh;
 	ext4_lblk_t block;
 	int retval;
@@ -1511,7 +1541,7 @@
 		if (IS_ERR(bh))
 			goto errout;
 
-		retval = search_dirblock(bh, dir, fname, d_name,
+		retval = search_dirblock(bh, dir, fname,
 					 block << EXT4_BLOCK_SIZE_BITS(sb),
 					 res_dir);
 		if (retval == 1)
@@ -1536,7 +1566,7 @@
 
 	bh = NULL;
 errout:
-	dxtrace(printk(KERN_DEBUG "%s not found\n", d_name->name));
+	dxtrace(printk(KERN_DEBUG "%s not found\n", fname->usr_fname->name));
 success:
 	dx_release(frames);
 	return bh;
@@ -1547,16 +1577,11 @@
 	struct inode *inode;
 	struct ext4_dir_entry_2 *de;
 	struct buffer_head *bh;
-	int err;
-
-	err = fscrypt_prepare_lookup(dir, dentry, flags);
-	if (err)
-		return ERR_PTR(err);
 
 	if (dentry->d_name.len > EXT4_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
+	bh = ext4_lookup_entry(dir, dentry, &de);
 	if (IS_ERR(bh))
 		return (struct dentry *) bh;
 	inode = NULL;
diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
index f8d73bd..c58a4d7 100644
--- a/fs/ext4/readpage.c
+++ b/fs/ext4/readpage.c
@@ -281,7 +281,7 @@
 			struct fscrypt_ctx *ctx = NULL;
 
 			if (IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode)) {
-				ctx = fscrypt_get_ctx(inode, GFP_NOFS);
+				ctx = fscrypt_get_ctx(GFP_NOFS);
 				if (IS_ERR(ctx))
 					goto set_error_page;
 			}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index a8f99b9..90a1bbb 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -965,6 +965,9 @@
 static void ext4_i_callback(struct rcu_head *head)
 {
 	struct inode *inode = container_of(head, struct inode, i_rcu);
+
+	fscrypt_free_inode(inode);
+
 	kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
 }
 
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index a5403b2..a28eac2 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -146,8 +146,8 @@
 
 	exist = f2fs_test_bit(offset, se->cur_valid_map);
 	if (!exist && type == DATA_GENERIC_ENHANCE) {
-		f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error "
-			"blkaddr:%u, sit bitmap:%d", blkaddr, exist);
+		f2fs_err(sbi, "Inconsistent error blkaddr:%u, sit bitmap:%d",
+			 blkaddr, exist);
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
 		WARN_ON(1);
 	}
@@ -184,8 +184,8 @@
 	case DATA_GENERIC_ENHANCE_READ:
 		if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
 				blkaddr < MAIN_BLKADDR(sbi))) {
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"access invalid blkaddr:%u", blkaddr);
+			f2fs_warn(sbi, "access invalid blkaddr:%u",
+				  blkaddr);
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
 			WARN_ON(1);
 			return false;
@@ -657,9 +657,8 @@
 
 err_out:
 	set_sbi_flag(sbi, SBI_NEED_FSCK);
-	f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: orphan failed (ino=%x), run fsck to fix.",
-			__func__, ino);
+	f2fs_warn(sbi, "%s: orphan failed (ino=%x), run fsck to fix.",
+		  __func__, ino);
 	return err;
 }
 
@@ -676,13 +675,12 @@
 		return 0;
 
 	if (bdev_read_only(sbi->sb->s_bdev)) {
-		f2fs_msg(sbi->sb, KERN_INFO, "write access "
-			"unavailable, skipping orphan cleanup");
+		f2fs_info(sbi, "write access unavailable, skipping orphan cleanup");
 		return 0;
 	}
 
 	if (s_flags & MS_RDONLY) {
-		f2fs_msg(sbi->sb, KERN_INFO, "orphan cleanup on readonly fs");
+		f2fs_info(sbi, "orphan cleanup on readonly fs");
 		sbi->sb->s_flags &= ~MS_RDONLY;
 	}
 
@@ -827,26 +825,14 @@
 	if (crc_offset < CP_MIN_CHKSUM_OFFSET ||
 			crc_offset > CP_CHKSUM_OFFSET) {
 		f2fs_put_page(*cp_page, 1);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"invalid crc_offset: %zu", crc_offset);
+		f2fs_warn(sbi, "invalid crc_offset: %zu", crc_offset);
 		return -EINVAL;
 	}
 
-	if (__is_set_ckpt_flags(*cp_block, CP_LARGE_NAT_BITMAP_FLAG)) {
-		if (crc_offset != CP_MIN_CHKSUM_OFFSET) {
-			f2fs_put_page(*cp_page, 1);
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"layout of large_nat_bitmap is deprecated, "
-				"run fsck to repair, chksum_offset: %zu",
-				crc_offset);
-			return -EINVAL;
-		}
-	}
-
 	crc = f2fs_checkpoint_chksum(sbi, *cp_block);
 	if (crc != cur_cp_crc(*cp_block)) {
 		f2fs_put_page(*cp_page, 1);
-		f2fs_msg(sbi->sb, KERN_WARNING, "invalid crc value");
+		f2fs_warn(sbi, "invalid crc value");
 		return -EINVAL;
 	}
 
@@ -869,9 +855,8 @@
 
 	if (le32_to_cpu(cp_block->cp_pack_total_block_count) >
 					sbi->blocks_per_seg) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"invalid cp_pack_total_block_count:%u",
-			le32_to_cpu(cp_block->cp_pack_total_block_count));
+		f2fs_warn(sbi, "invalid cp_pack_total_block_count:%u",
+			  le32_to_cpu(cp_block->cp_pack_total_block_count));
 		goto invalid_cp;
 	}
 	pre_version = *version;
@@ -905,6 +890,7 @@
 	unsigned int cp_blks = 1 + __cp_payload(sbi);
 	block_t cp_blk_no;
 	int i;
+	int err;
 
 	sbi->ckpt = f2fs_kzalloc(sbi, array_size(blk_size, cp_blks),
 				 GFP_KERNEL);
@@ -932,6 +918,7 @@
 	} else if (cp2) {
 		cur_page = cp2;
 	} else {
+		err = -EFSCORRUPTED;
 		goto fail_no_cp;
 	}
 
@@ -944,8 +931,10 @@
 		sbi->cur_cp_pack = 2;
 
 	/* Sanity checking of checkpoint */
-	if (f2fs_sanity_check_ckpt(sbi))
+	if (f2fs_sanity_check_ckpt(sbi)) {
+		err = -EFSCORRUPTED;
 		goto free_fail_no_cp;
+	}
 
 	if (cp_blks <= 1)
 		goto done;
@@ -959,8 +948,10 @@
 		unsigned char *ckpt = (unsigned char *)sbi->ckpt;
 
 		cur_page = f2fs_get_meta_page(sbi, cp_blk_no + i);
-		if (IS_ERR(cur_page))
+		if (IS_ERR(cur_page)) {
+			err = PTR_ERR(cur_page);
 			goto free_fail_no_cp;
+		}
 		sit_bitmap_ptr = page_address(cur_page);
 		memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
 		f2fs_put_page(cur_page, 1);
@@ -975,7 +966,7 @@
 	f2fs_put_page(cp2, 1);
 fail_no_cp:
 	kvfree(sbi->ckpt);
-	return -EINVAL;
+	return err;
 }
 
 static void __add_dirty_inode(struct inode *inode, enum inode_type type)
@@ -1142,17 +1133,24 @@
 
 static bool __need_flush_quota(struct f2fs_sb_info *sbi)
 {
+	bool ret = false;
+
 	if (!is_journalled_quota(sbi))
 		return false;
-	if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH))
-		return false;
-	if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR))
-		return false;
-	if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_FLUSH))
-		return true;
-	if (get_pages(sbi, F2FS_DIRTY_QDATA))
-		return true;
-	return false;
+
+	down_write(&sbi->quota_sem);
+	if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH)) {
+		ret = false;
+	} else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR)) {
+		ret = false;
+	} else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_FLUSH)) {
+		clear_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
+		ret = true;
+	} else if (get_pages(sbi, F2FS_DIRTY_QDATA)) {
+		ret = true;
+	}
+	up_write(&sbi->quota_sem);
+	return ret;
 }
 
 /*
@@ -1171,26 +1169,22 @@
 	blk_start_plug(&plug);
 
 retry_flush_quotas:
+	f2fs_lock_all(sbi);
 	if (__need_flush_quota(sbi)) {
 		int locked;
 
 		if (++cnt > DEFAULT_RETRY_QUOTA_FLUSH_COUNT) {
 			set_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
-			f2fs_lock_all(sbi);
+			set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
 			goto retry_flush_dents;
 		}
-		clear_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
+		f2fs_unlock_all(sbi);
 
 		/* only failed during mount/umount/freeze/quotactl */
 		locked = down_read_trylock(&sbi->sb->s_umount);
 		f2fs_quota_sync(sbi->sb, -1);
 		if (locked)
 			up_read(&sbi->sb->s_umount);
-	}
-
-	f2fs_lock_all(sbi);
-	if (__need_flush_quota(sbi)) {
-		f2fs_unlock_all(sbi);
 		cond_resched();
 		goto retry_flush_quotas;
 	}
@@ -1212,12 +1206,6 @@
 	 */
 	down_write(&sbi->node_change);
 
-	if (__need_flush_quota(sbi)) {
-		up_write(&sbi->node_change);
-		f2fs_unlock_all(sbi);
-		goto retry_flush_quotas;
-	}
-
 	if (get_pages(sbi, F2FS_DIRTY_IMETA)) {
 		up_write(&sbi->node_change);
 		f2fs_unlock_all(sbi);
@@ -1313,7 +1301,8 @@
 	else
 		__clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
 
-	if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
+	if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) ||
+		is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
 		__set_ckpt_flags(ckpt, CP_FSCK_FLAG);
 
 	if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
@@ -1569,8 +1558,7 @@
 	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
 		if (cpc->reason != CP_PAUSE)
 			return 0;
-		f2fs_msg(sbi->sb, KERN_WARNING,
-				"Start checkpoint disabled!");
+		f2fs_warn(sbi, "Start checkpoint disabled!");
 	}
 	mutex_lock(&sbi->cp_mutex);
 
@@ -1636,8 +1624,7 @@
 	stat_inc_cp_count(sbi->stat_info);
 
 	if (cpc->reason & CP_RECOVERY)
-		f2fs_msg(sbi->sb, KERN_NOTICE,
-			"checkpoint: version = %llx", ckpt_ver);
+		f2fs_notice(sbi, "checkpoint: version = %llx", ckpt_ver);
 
 	/* do checkpoint periodically */
 	f2fs_update_time(sbi, CP_TIME);
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 1e58d1c..4e14e3a 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -14,6 +14,7 @@
 #include <linux/pagevec.h>
 #include <linux/blkdev.h>
 #include <linux/bio.h>
+#include <linux/swap.h>
 #include <linux/prefetch.h>
 #include <linux/uio.h>
 #include <linux/cleancache.h>
@@ -54,7 +55,7 @@
 
 static enum count_type __read_io_type(struct page *page)
 {
-	struct address_space *mapping = page->mapping;
+	struct address_space *mapping = page_file_mapping(page);
 
 	if (mapping) {
 		struct inode *inode = mapping->host;
@@ -380,20 +381,20 @@
 	io->bio = NULL;
 }
 
-static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode,
+static bool __has_merged_page(struct bio *bio, struct inode *inode,
 						struct page *page, nid_t ino)
 {
 	struct bio_vec *bvec;
 	struct page *target;
 	int i;
 
-	if (!io->bio)
+	if (!bio)
 		return false;
 
 	if (!inode && !page && !ino)
 		return true;
 
-	bio_for_each_segment_all(bvec, io->bio, i) {
+	bio_for_each_segment_all(bvec, bio, i) {
 
 		if (bvec->bv_page->mapping)
 			target = bvec->bv_page;
@@ -444,7 +445,7 @@
 			struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
 
 			down_read(&io->io_rwsem);
-			ret = __has_merged_page(io, inode, page, ino);
+			ret = __has_merged_page(io->bio, inode, page, ino);
 			up_read(&io->io_rwsem);
 		}
 		if (ret)
@@ -488,7 +489,7 @@
 	if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
 			fio->is_por ? META_POR : (__is_meta_io(fio) ?
 			META_GENERIC : DATA_GENERIC_ENHANCE)))
-		return -EFAULT;
+		return -EFSCORRUPTED;
 
 	trace_f2fs_submit_page_bio(page, fio);
 	f2fs_trace_ios(fio, 0);
@@ -517,6 +518,61 @@
 	return 0;
 }
 
+int f2fs_merge_page_bio(struct f2fs_io_info *fio)
+{
+	struct bio *bio = *fio->bio;
+	struct page *page = fio->encrypted_page ?
+			fio->encrypted_page : fio->page;
+
+	if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
+			__is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
+		return -EFSCORRUPTED;
+
+	trace_f2fs_submit_page_bio(page, fio);
+	f2fs_trace_ios(fio, 0);
+
+	if (bio && (*fio->last_block + 1 != fio->new_blkaddr ||
+			!__same_bdev(fio->sbi, fio->new_blkaddr, bio))) {
+		__submit_bio(fio->sbi, bio, fio->type);
+		bio = NULL;
+	}
+alloc_new:
+	if (!bio) {
+		bio = __bio_alloc(fio->sbi, fio->new_blkaddr, fio->io_wbc,
+				BIO_MAX_PAGES, false, fio->type, fio->temp);
+		bio_set_op_attrs(bio, fio->op, fio->op_flags);
+	}
+
+	if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
+		__submit_bio(fio->sbi, bio, fio->type);
+		bio = NULL;
+		goto alloc_new;
+	}
+
+	if (fio->io_wbc)
+		wbc_account_io(fio->io_wbc, page, PAGE_SIZE);
+
+	inc_page_count(fio->sbi, WB_DATA_TYPE(page));
+
+	*fio->last_block = fio->new_blkaddr;
+	*fio->bio = bio;
+
+	return 0;
+}
+
+static void f2fs_submit_ipu_bio(struct f2fs_sb_info *sbi, struct bio **bio,
+							struct page *page)
+{
+	if (!bio)
+		return;
+
+	if (!__has_merged_page(*bio, NULL, page, 0))
+		return;
+
+	__submit_bio(sbi, *bio, DATA);
+	*bio = NULL;
+}
+
 void f2fs_submit_page_write(struct f2fs_io_info *fio)
 {
 	struct f2fs_sb_info *sbi = fio->sbi;
@@ -770,7 +826,7 @@
 		dn.data_blkaddr = ei.blk + index - ei.fofs;
 		if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
 						DATA_GENERIC_ENHANCE_READ)) {
-			err = -EFAULT;
+			err = -EFSCORRUPTED;
 			goto put_err;
 		}
 		goto got_it;
@@ -790,7 +846,7 @@
 			!f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
 						dn.data_blkaddr,
 						DATA_GENERIC_ENHANCE)) {
-		err = -EFAULT;
+		err = -EFSCORRUPTED;
 		goto put_err;
 	}
 got_it:
@@ -1136,7 +1192,7 @@
 
 	if (__is_valid_data_blkaddr(blkaddr) &&
 		!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
-		err = -EFAULT;
+		err = -EFSCORRUPTED;
 		goto sync_out;
 	}
 
@@ -1566,7 +1622,7 @@
 	sector_t block_nr;
 	int ret = 0;
 
-	block_in_file = (sector_t)page->index;
+	block_in_file = (sector_t)page_index(page);
 	last_block = block_in_file + nr_pages;
 	last_block_in_file = (i_size_read(inode) + blocksize - 1) >>
 							blkbits;
@@ -1599,14 +1655,15 @@
 		block_nr = map->m_pblk + block_in_file - map->m_lblk;
 		SetPageMappedToDisk(page);
 
-		if (!PageUptodate(page) && !cleancache_get_page(page)) {
+		if (!PageUptodate(page) && (!PageSwapCache(page) &&
+					!cleancache_get_page(page))) {
 			SetPageUptodate(page);
 			goto confused;
 		}
 
 		if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
 						DATA_GENERIC_ENHANCE_READ)) {
-			ret = -EFAULT;
+			ret = -EFSCORRUPTED;
 			goto out;
 		}
 	} else {
@@ -1697,7 +1754,7 @@
 			prefetchw(&page->flags);
 			list_del(&page->lru);
 			if (add_to_page_cache_lru(page, mapping,
-						  page->index,
+						  page_index(page),
 						  readahead_gfp_mask(mapping)))
 				goto next_page;
 		}
@@ -1721,7 +1778,7 @@
 
 static int f2fs_read_data_page(struct file *file, struct page *page)
 {
-	struct inode *inode = page->mapping->host;
+	struct inode *inode = page_file_mapping(page)->host;
 	int ret = -EAGAIN;
 
 	trace_f2fs_readpage(page, DATA);
@@ -1730,7 +1787,8 @@
 	if (f2fs_has_inline_data(inode))
 		ret = f2fs_read_inline_data(inode, page);
 	if (ret == -EAGAIN)
-		ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1, false);
+		ret = f2fs_mpage_readpages(page_file_mapping(page),
+						NULL, page, 1, false);
 	return ret;
 }
 
@@ -1887,7 +1945,7 @@
 
 		if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
 						DATA_GENERIC_ENHANCE))
-			return -EFAULT;
+			return -EFSCORRUPTED;
 
 		ipu_force = true;
 		fio->need_lock = LOCK_DONE;
@@ -1914,7 +1972,7 @@
 	if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
 		!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
 						DATA_GENERIC_ENHANCE)) {
-		err = -EFAULT;
+		err = -EFSCORRUPTED;
 		goto out_writepage;
 	}
 	/*
@@ -1983,6 +2041,8 @@
 }
 
 static int __write_data_page(struct page *page, bool *submitted,
+				struct bio **bio,
+				sector_t *last_block,
 				struct writeback_control *wbc,
 				enum iostat_type io_type)
 {
@@ -2008,6 +2068,8 @@
 		.need_lock = LOCK_RETRY,
 		.io_type = io_type,
 		.io_wbc = wbc,
+		.bio = bio,
+		.last_block = last_block,
 	};
 
 	trace_f2fs_writepage(page, DATA);
@@ -2106,10 +2168,13 @@
 
 	unlock_page(page);
 	if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
-					!F2FS_I(inode)->cp_task)
+					!F2FS_I(inode)->cp_task) {
+		f2fs_submit_ipu_bio(sbi, bio, page);
 		f2fs_balance_fs(sbi, need_balance_fs);
+	}
 
 	if (unlikely(f2fs_cp_error(sbi))) {
+		f2fs_submit_ipu_bio(sbi, bio, page);
 		f2fs_submit_merged_write(sbi, DATA);
 		submitted = NULL;
 	}
@@ -2136,7 +2201,7 @@
 static int f2fs_write_data_page(struct page *page,
 					struct writeback_control *wbc)
 {
-	return __write_data_page(page, NULL, wbc, FS_DATA_IO);
+	return __write_data_page(page, NULL, NULL, NULL, wbc, FS_DATA_IO);
 }
 
 /*
@@ -2152,6 +2217,8 @@
 	int done = 0;
 	struct pagevec pvec;
 	struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
+	struct bio *bio = NULL;
+	sector_t last_block;
 	int nr_pages;
 	pgoff_t uninitialized_var(writeback_index);
 	pgoff_t index;
@@ -2228,17 +2295,20 @@
 			}
 
 			if (PageWriteback(page)) {
-				if (wbc->sync_mode != WB_SYNC_NONE)
+				if (wbc->sync_mode != WB_SYNC_NONE) {
 					f2fs_wait_on_page_writeback(page,
 							DATA, true, true);
-				else
+					f2fs_submit_ipu_bio(sbi, &bio, page);
+				} else {
 					goto continue_unlock;
+				}
 			}
 
 			if (!clear_page_dirty_for_io(page))
 				goto continue_unlock;
 
-			ret = __write_data_page(page, &submitted, wbc, io_type);
+			ret = __write_data_page(page, &submitted, &bio,
+					&last_block, wbc, io_type);
 			if (unlikely(ret)) {
 				/*
 				 * keep nr_to_write, since vfs uses this to
@@ -2287,6 +2357,9 @@
 	if (nwritten)
 		f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
 								NULL, 0, DATA);
+	/* submit cached bio of IPU write */
+	if (bio)
+		__submit_bio(sbi, bio, DATA);
 
 	return ret;
 }
@@ -2298,6 +2371,9 @@
 		return false;
 	if (IS_NOQUOTA(inode))
 		return false;
+	/* to avoid deadlock in path of data flush */
+	if (F2FS_I(inode)->cp_task)
+		return false;
 	if (wbc->sync_mode != WB_SYNC_ALL)
 		return true;
 	if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
@@ -2579,7 +2655,7 @@
 	} else {
 		if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
 				DATA_GENERIC_ENHANCE_READ)) {
-			err = -EFAULT;
+			err = -EFSCORRUPTED;
 			goto fail;
 		}
 		err = f2fs_submit_page_read(inode, page, blkaddr);
@@ -2853,13 +2929,14 @@
 
 static int f2fs_set_data_page_dirty(struct page *page)
 {
-	struct address_space *mapping = page->mapping;
-	struct inode *inode = mapping->host;
+	struct inode *inode = page_file_mapping(page)->host;
 
 	trace_f2fs_set_page_dirty(page, DATA);
 
 	if (!PageUptodate(page))
 		SetPageUptodate(page);
+	if (PageSwapCache(page))
+		return __set_page_dirty_nobuffers(page);
 
 	if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
 		if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
@@ -2948,6 +3025,126 @@
 }
 #endif
 
+#ifdef CONFIG_SWAP
+/* Copied from generic_swapfile_activate() to check any holes */
+static int check_swap_activate(struct file *swap_file, unsigned int max)
+{
+	struct address_space *mapping = swap_file->f_mapping;
+	struct inode *inode = mapping->host;
+	unsigned blocks_per_page;
+	unsigned long page_no;
+	unsigned blkbits;
+	sector_t probe_block;
+	sector_t last_block;
+	sector_t lowest_block = -1;
+	sector_t highest_block = 0;
+
+	blkbits = inode->i_blkbits;
+	blocks_per_page = PAGE_SIZE >> blkbits;
+
+	/*
+	 * Map all the blocks into the extent list.  This code doesn't try
+	 * to be very smart.
+	 */
+	probe_block = 0;
+	page_no = 0;
+	last_block = i_size_read(inode) >> blkbits;
+	while ((probe_block + blocks_per_page) <= last_block && page_no < max) {
+		unsigned block_in_page;
+		sector_t first_block;
+
+		cond_resched();
+
+		first_block = bmap(inode, probe_block);
+		if (first_block == 0)
+			goto bad_bmap;
+
+		/*
+		 * It must be PAGE_SIZE aligned on-disk
+		 */
+		if (first_block & (blocks_per_page - 1)) {
+			probe_block++;
+			goto reprobe;
+		}
+
+		for (block_in_page = 1; block_in_page < blocks_per_page;
+					block_in_page++) {
+			sector_t block;
+
+			block = bmap(inode, probe_block + block_in_page);
+			if (block == 0)
+				goto bad_bmap;
+			if (block != first_block + block_in_page) {
+				/* Discontiguity */
+				probe_block++;
+				goto reprobe;
+			}
+		}
+
+		first_block >>= (PAGE_SHIFT - blkbits);
+		if (page_no) {	/* exclude the header page */
+			if (first_block < lowest_block)
+				lowest_block = first_block;
+			if (first_block > highest_block)
+				highest_block = first_block;
+		}
+
+		page_no++;
+		probe_block += blocks_per_page;
+reprobe:
+		continue;
+	}
+	return 0;
+
+bad_bmap:
+	pr_err("swapon: swapfile has holes\n");
+	return -EINVAL;
+}
+
+static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
+				sector_t *span)
+{
+	struct inode *inode = file_inode(file);
+	int ret;
+
+	if (!S_ISREG(inode->i_mode))
+		return -EINVAL;
+
+	if (f2fs_readonly(F2FS_I_SB(inode)->sb))
+		return -EROFS;
+
+	ret = f2fs_convert_inline_inode(inode);
+	if (ret)
+		return ret;
+
+	ret = check_swap_activate(file, sis->max);
+	if (ret)
+		return ret;
+
+	set_inode_flag(inode, FI_PIN_FILE);
+	f2fs_precache_extents(inode);
+	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+	return 0;
+}
+
+static void f2fs_swap_deactivate(struct file *file)
+{
+	struct inode *inode = file_inode(file);
+
+	clear_inode_flag(inode, FI_PIN_FILE);
+}
+#else
+static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
+				sector_t *span)
+{
+	return -EOPNOTSUPP;
+}
+
+static void f2fs_swap_deactivate(struct file *file)
+{
+}
+#endif
+
 const struct address_space_operations f2fs_dblock_aops = {
 	.readpage	= f2fs_read_data_page,
 	.readpages	= f2fs_read_data_pages,
@@ -2960,6 +3157,8 @@
 	.releasepage	= f2fs_release_page,
 	.direct_IO	= f2fs_direct_IO,
 	.bmap		= f2fs_bmap,
+	.swap_activate  = f2fs_swap_activate,
+	.swap_deactivate = f2fs_swap_deactivate,
 #ifdef CONFIG_MIGRATION
 	.migratepage    = f2fs_migrate_page,
 #endif
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index d00ba9b..9cadcf9 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -27,8 +27,15 @@
 static void update_general_status(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_stat_info *si = F2FS_STAT(sbi);
+	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
 	int i;
 
+	/* these will be changed if online resize is done */
+	si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
+	si->main_area_sections = le32_to_cpu(raw_super->section_count);
+	si->main_area_zones = si->main_area_sections /
+				le32_to_cpu(raw_super->secs_per_zone);
+
 	/* validation check of the segment numbers */
 	si->hit_largest = atomic64_read(&sbi->read_hit_largest);
 	si->hit_cached = atomic64_read(&sbi->read_hit_cached);
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index bd93504..f1f746d 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -218,9 +218,8 @@
 
 	max_depth = F2FS_I(dir)->i_current_depth;
 	if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) {
-		f2fs_msg(F2FS_I_SB(dir)->sb, KERN_WARNING,
-				"Corrupted max_depth of %lu: %u",
-				dir->i_ino, max_depth);
+		f2fs_warn(F2FS_I_SB(dir), "Corrupted max_depth of %lu: %u",
+			  dir->i_ino, max_depth);
 		max_depth = MAX_DIR_HASH_DEPTH;
 		f2fs_i_depth_write(dir, max_depth);
 	}
@@ -816,11 +815,10 @@
 		bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
 		if (unlikely(bit_pos > d->max ||
 				le16_to_cpu(de->name_len) > F2FS_NAME_LEN)) {
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"%s: corrupted namelen=%d, run fsck to fix.",
-				__func__, le16_to_cpu(de->name_len));
+			f2fs_warn(sbi, "%s: corrupted namelen=%d, run fsck to fix.",
+				  __func__, le16_to_cpu(de->name_len));
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
-			err = -EINVAL;
+			err = -EFSCORRUPTED;
 			goto out;
 		}
 
@@ -828,8 +826,8 @@
 			int save_len = fstr->len;
 
 			err = fscrypt_fname_disk_to_usr(d->inode,
-						(u32)de->hash_code, 0,
-						&de_name, fstr);
+						(u32)le32_to_cpu(de->hash_code),
+						0, &de_name, fstr);
 			if (err)
 				goto out;
 
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index 904ad7b..a770226 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -175,10 +175,9 @@
 		next_re = rb_entry(next, struct rb_entry, rb_node);
 
 		if (cur_re->ofs + cur_re->len > next_re->ofs) {
-			f2fs_msg(sbi->sb, KERN_INFO, "inconsistent rbtree, "
-				"cur(%u, %u) next(%u, %u)",
-				cur_re->ofs, cur_re->len,
-				next_re->ofs, next_re->len);
+			f2fs_info(sbi, "inconsistent rbtree, cur(%u, %u) next(%u, %u)",
+				  cur_re->ofs, cur_re->len,
+				  next_re->ofs, next_re->len);
 			return false;
 		}
 
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 50fb0c4..87a0d0b 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -138,6 +138,9 @@
 	int alloc_mode;			/* segment allocation policy */
 	int fsync_mode;			/* fsync policy */
 	bool test_dummy_encryption;	/* test dummy encryption */
+	block_t unusable_cap;		/* Amount of space allowed to be
+					 * unusable when disabling checkpoint
+					 */
 };
 
 #define F2FS_FEATURE_ENCRYPT		0x0001
@@ -414,6 +417,7 @@
 #define F2FS_IOC_SET_PIN_FILE		_IOW(F2FS_IOCTL_MAGIC, 13, __u32)
 #define F2FS_IOC_GET_PIN_FILE		_IOR(F2FS_IOCTL_MAGIC, 14, __u32)
 #define F2FS_IOC_PRECACHE_EXTENTS	_IO(F2FS_IOCTL_MAGIC, 15)
+#define F2FS_IOC_RESIZE_FS		_IOW(F2FS_IOCTL_MAGIC, 16, __u64)
 
 #define F2FS_IOC_SET_ENCRYPTION_POLICY	FS_IOC_SET_ENCRYPTION_POLICY
 #define F2FS_IOC_GET_ENCRYPTION_POLICY	FS_IOC_GET_ENCRYPTION_POLICY
@@ -475,8 +479,8 @@
 #define NR_INLINE_DENTRY(inode)	(MAX_INLINE_DATA(inode) * BITS_PER_BYTE / \
 				((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
 				BITS_PER_BYTE + 1))
-#define INLINE_DENTRY_BITMAP_SIZE(inode)	((NR_INLINE_DENTRY(inode) + \
-					BITS_PER_BYTE - 1) / BITS_PER_BYTE)
+#define INLINE_DENTRY_BITMAP_SIZE(inode) \
+	DIV_ROUND_UP(NR_INLINE_DENTRY(inode), BITS_PER_BYTE)
 #define INLINE_RESERVED_SIZE(inode)	(MAX_INLINE_DATA(inode) - \
 				((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
 				NR_INLINE_DENTRY(inode) + \
@@ -1051,6 +1055,8 @@
 	bool retry;		/* need to reallocate block address */
 	enum iostat_type io_type;	/* io type */
 	struct writeback_control *io_wbc; /* writeback control */
+	struct bio **bio;		/* bio for ipu */
+	sector_t *last_block;		/* last block number in bio */
 	unsigned char version;		/* version of the node */
 };
 
@@ -1110,6 +1116,7 @@
 	SBI_QUOTA_NEED_FLUSH,			/* need to flush quota info in CP */
 	SBI_QUOTA_SKIP_FLUSH,			/* skip flushing quota in current CP */
 	SBI_QUOTA_NEED_REPAIR,			/* quota file may be corrupted */
+	SBI_IS_RESIZEFS,			/* resizefs is in process */
 };
 
 enum {
@@ -1206,6 +1213,7 @@
 	/* for inode management */
 	struct list_head inode_list[NR_INODE_TYPE];	/* dirty inode list */
 	spinlock_t inode_lock[NR_INODE_TYPE];	/* for dirty inode list lock */
+	struct mutex flush_lock;		/* for flush exclusion */
 
 	/* for extent tree cache */
 	struct radix_tree_root extent_tree_root;/* cache extent cache entries */
@@ -1229,6 +1237,7 @@
 	unsigned int segs_per_sec;		/* segments per section */
 	unsigned int secs_per_zone;		/* sections per zone */
 	unsigned int total_sections;		/* total section count */
+	struct mutex resize_mutex;		/* for resize exclusion */
 	unsigned int total_node_count;		/* total node block count */
 	unsigned int total_valid_node_count;	/* valid node block count */
 	loff_t max_file_blocks;			/* max block index of file */
@@ -1246,6 +1255,7 @@
 	block_t unusable_block_count;		/* # of blocks saved by last cp */
 
 	unsigned int nquota_files;		/* # of quota sysfile */
+	struct rw_semaphore quota_sem;		/* blocking cp for flags */
 
 	/* # of pages, see count_type */
 	atomic_t nr_pages[NR_COUNT_TYPE];
@@ -1488,7 +1498,7 @@
 
 static inline struct f2fs_sb_info *F2FS_P_SB(struct page *page)
 {
-	return F2FS_M_SB(page->mapping);
+	return F2FS_M_SB(page_file_mapping(page));
 }
 
 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
@@ -1766,8 +1776,12 @@
 
 	if (!__allow_reserved_blocks(sbi, inode, true))
 		avail_user_block_count -= F2FS_OPTION(sbi).root_reserved_blocks;
-	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
-		avail_user_block_count -= sbi->unusable_block_count;
+	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
+		if (avail_user_block_count > sbi->unusable_block_count)
+			avail_user_block_count -= sbi->unusable_block_count;
+		else
+			avail_user_block_count = 0;
+	}
 	if (unlikely(sbi->total_valid_block_count > avail_user_block_count)) {
 		diff = sbi->total_valid_block_count - avail_user_block_count;
 		if (diff > *count)
@@ -1795,7 +1809,20 @@
 	return -ENOSPC;
 }
 
-void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...);
+__printf(2, 3)
+void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...);
+
+#define f2fs_err(sbi, fmt, ...)						\
+	f2fs_printk(sbi, KERN_ERR fmt, ##__VA_ARGS__)
+#define f2fs_warn(sbi, fmt, ...)					\
+	f2fs_printk(sbi, KERN_WARNING fmt, ##__VA_ARGS__)
+#define f2fs_notice(sbi, fmt, ...)					\
+	f2fs_printk(sbi, KERN_NOTICE fmt, ##__VA_ARGS__)
+#define f2fs_info(sbi, fmt, ...)					\
+	f2fs_printk(sbi, KERN_INFO fmt, ##__VA_ARGS__)
+#define f2fs_debug(sbi, fmt, ...)					\
+	f2fs_printk(sbi, KERN_DEBUG fmt, ##__VA_ARGS__)
+
 static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
 						struct inode *inode,
 						block_t count)
@@ -1811,11 +1838,10 @@
 					sbi->current_reserved_blocks + count);
 	spin_unlock(&sbi->stat_lock);
 	if (unlikely(inode->i_blocks < sectors)) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"Inconsistent i_blocks, ino:%lu, iblocks:%llu, sectors:%llu",
-			inode->i_ino,
-			(unsigned long long)inode->i_blocks,
-			(unsigned long long)sectors);
+		f2fs_warn(sbi, "Inconsistent i_blocks, ino:%lu, iblocks:%llu, sectors:%llu",
+			  inode->i_ino,
+			  (unsigned long long)inode->i_blocks,
+			  (unsigned long long)sectors);
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
 		return;
 	}
@@ -1967,7 +1993,7 @@
 					struct inode *inode, bool is_inode)
 {
 	block_t	valid_block_count;
-	unsigned int valid_node_count;
+	unsigned int valid_node_count, user_block_count;
 	int err;
 
 	if (is_inode) {
@@ -1994,10 +2020,11 @@
 
 	if (!__allow_reserved_blocks(sbi, inode, false))
 		valid_block_count += F2FS_OPTION(sbi).root_reserved_blocks;
+	user_block_count = sbi->user_block_count;
 	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
-		valid_block_count += sbi->unusable_block_count;
+		user_block_count -= sbi->unusable_block_count;
 
-	if (unlikely(valid_block_count > sbi->user_block_count)) {
+	if (unlikely(valid_block_count > user_block_count)) {
 		spin_unlock(&sbi->stat_lock);
 		goto enospc;
 	}
@@ -2052,10 +2079,9 @@
 		dquot_free_inode(inode);
 	} else {
 		if (unlikely(inode->i_blocks == 0)) {
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"Inconsistent i_blocks, ino:%lu, iblocks:%llu",
-				inode->i_ino,
-				(unsigned long long)inode->i_blocks);
+			f2fs_warn(sbi, "Inconsistent i_blocks, ino:%lu, iblocks:%llu",
+				  inode->i_ino,
+				  (unsigned long long)inode->i_blocks);
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
 			return;
 		}
@@ -2191,6 +2217,9 @@
 
 static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
 {
+	if (sbi->gc_mode == GC_URGENT)
+		return true;
+
 	if (get_pages(sbi, F2FS_RD_DATA) || get_pages(sbi, F2FS_RD_NODE) ||
 		get_pages(sbi, F2FS_RD_META) || get_pages(sbi, F2FS_WB_DATA) ||
 		get_pages(sbi, F2FS_WB_CP_DATA) ||
@@ -2198,7 +2227,7 @@
 		get_pages(sbi, F2FS_DIO_WRITE))
 		return false;
 
-	if (SM_I(sbi) && SM_I(sbi)->dcc_info &&
+	if (type != DISCARD_TIME && SM_I(sbi) && SM_I(sbi)->dcc_info &&
 			atomic_read(&SM_I(sbi)->dcc_info->queued_discard))
 		return false;
 
@@ -2320,57 +2349,23 @@
 }
 
 /*
- * Inode flags
+ * On-disk inode flags (f2fs_inode::i_flags)
  */
-#define F2FS_SECRM_FL			0x00000001 /* Secure deletion */
-#define F2FS_UNRM_FL			0x00000002 /* Undelete */
-#define F2FS_COMPR_FL			0x00000004 /* Compress file */
 #define F2FS_SYNC_FL			0x00000008 /* Synchronous updates */
 #define F2FS_IMMUTABLE_FL		0x00000010 /* Immutable file */
 #define F2FS_APPEND_FL			0x00000020 /* writes to file may only append */
 #define F2FS_NODUMP_FL			0x00000040 /* do not dump file */
 #define F2FS_NOATIME_FL			0x00000080 /* do not update atime */
-/* Reserved for compression usage... */
-#define F2FS_DIRTY_FL			0x00000100
-#define F2FS_COMPRBLK_FL		0x00000200 /* One or more compressed clusters */
-#define F2FS_NOCOMPR_FL			0x00000400 /* Don't compress */
-#define F2FS_ENCRYPT_FL			0x00000800 /* encrypted file */
-/* End compression flags --- maybe not all used */
 #define F2FS_INDEX_FL			0x00001000 /* hash-indexed directory */
-#define F2FS_IMAGIC_FL			0x00002000 /* AFS directory */
-#define F2FS_JOURNAL_DATA_FL		0x00004000 /* file data should be journaled */
-#define F2FS_NOTAIL_FL			0x00008000 /* file tail should not be merged */
 #define F2FS_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
-#define F2FS_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
-#define F2FS_HUGE_FILE_FL               0x00040000 /* Set to each huge file */
-#define F2FS_EXTENTS_FL			0x00080000 /* Inode uses extents */
-#define F2FS_EA_INODE_FL	        0x00200000 /* Inode used for large EA */
-#define F2FS_EOFBLOCKS_FL		0x00400000 /* Blocks allocated beyond EOF */
-#define F2FS_NOCOW_FL			0x00800000 /* Do not cow file */
-#define F2FS_INLINE_DATA_FL		0x10000000 /* Inode has inline data. */
 #define F2FS_PROJINHERIT_FL		0x20000000 /* Create with parents projid */
-#define F2FS_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
-
-#define F2FS_FL_USER_VISIBLE		0x30CBDFFF /* User visible flags */
-#define F2FS_FL_USER_MODIFIABLE		0x204BC0FF /* User modifiable flags */
-
-/* Flags we can manipulate with through F2FS_IOC_FSSETXATTR */
-#define F2FS_FL_XFLAG_VISIBLE		(F2FS_SYNC_FL | \
-					 F2FS_IMMUTABLE_FL | \
-					 F2FS_APPEND_FL | \
-					 F2FS_NODUMP_FL | \
-					 F2FS_NOATIME_FL | \
-					 F2FS_PROJINHERIT_FL)
 
 /* Flags that should be inherited by new inodes from their parent. */
-#define F2FS_FL_INHERITED (F2FS_SECRM_FL | F2FS_UNRM_FL | F2FS_COMPR_FL |\
-			   F2FS_SYNC_FL | F2FS_NODUMP_FL | F2FS_NOATIME_FL |\
-			   F2FS_NOCOMPR_FL | F2FS_JOURNAL_DATA_FL |\
-			   F2FS_NOTAIL_FL | F2FS_DIRSYNC_FL |\
-			   F2FS_PROJINHERIT_FL)
+#define F2FS_FL_INHERITED (F2FS_SYNC_FL | F2FS_NODUMP_FL | F2FS_NOATIME_FL | \
+			   F2FS_DIRSYNC_FL | F2FS_PROJINHERIT_FL)
 
 /* Flags that are appropriate for regular files (all but dir-specific ones). */
-#define F2FS_REG_FLMASK		(~(F2FS_DIRSYNC_FL | F2FS_TOPDIR_FL))
+#define F2FS_REG_FLMASK		(~(F2FS_DIRSYNC_FL | F2FS_PROJINHERIT_FL))
 
 /* Flags that are appropriate for non-directories/regular files. */
 #define F2FS_OTHER_FLMASK	(F2FS_NODUMP_FL | F2FS_NOATIME_FL)
@@ -2888,9 +2883,8 @@
 					block_t blkaddr, int type)
 {
 	if (!f2fs_is_valid_blkaddr(sbi, blkaddr, type)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"invalid blkaddr: %u, type: %d, run fsck to fix.",
-			blkaddr, type);
+		f2fs_err(sbi, "invalid blkaddr: %u, type: %d, run fsck to fix.",
+			 blkaddr, type);
 		f2fs_bug_on(sbi, 1);
 	}
 }
@@ -3020,8 +3014,6 @@
 void f2fs_quota_off_umount(struct super_block *sb);
 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover);
 int f2fs_sync_fs(struct super_block *sb, int sync);
-extern __printf(3, 4)
-void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...);
 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi);
 
 /*
@@ -3105,9 +3097,12 @@
 void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
 					struct cp_control *cpc);
 void f2fs_dirty_to_prefree(struct f2fs_sb_info *sbi);
-int f2fs_disable_cp_again(struct f2fs_sb_info *sbi);
+block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi);
+int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable);
 void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi);
 int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra);
+void allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
+					unsigned int start, unsigned int end);
 void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi);
 int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range);
 bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
@@ -3200,6 +3195,7 @@
 				nid_t ino, enum page_type type);
 void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi);
 int f2fs_submit_page_bio(struct f2fs_io_info *fio);
+int f2fs_merge_page_bio(struct f2fs_io_info *fio);
 void f2fs_submit_page_write(struct f2fs_io_info *fio);
 struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
 			block_t blk_addr, struct bio *bio);
@@ -3245,6 +3241,7 @@
 int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool background,
 			unsigned int segno);
 void f2fs_build_gc_manager(struct f2fs_sb_info *sbi);
+int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count);
 
 /*
  * recovery.c
@@ -3720,7 +3717,8 @@
 	if (test_opt(sbi, LFS) && (rw == WRITE) &&
 				block_unaligned_IO(inode, iocb, iter))
 		return true;
-	if (is_sbi_flag_set(F2FS_I_SB(inode), SBI_CP_DISABLED))
+	if (is_sbi_flag_set(F2FS_I_SB(inode), SBI_CP_DISABLED) &&
+					!(inode->i_flags & S_SWAPFILE))
 		return true;
 
 	return false;
@@ -3746,4 +3744,7 @@
 	return false;
 }
 
+#define EFSBADCRC	EBADMSG		/* Bad CRC detected */
+#define EFSCORRUPTED	EUCLEAN		/* Filesystem is corrupted */
+
 #endif /* _LINUX_F2FS_H */
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0c76bd1..4ab622b 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -722,11 +722,9 @@
 		stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
 	}
 
-	flags = fi->i_flags & F2FS_FL_USER_VISIBLE;
+	flags = fi->i_flags;
 	if (flags & F2FS_APPEND_FL)
 		stat->attributes |= STATX_ATTR_APPEND;
-	if (flags & F2FS_COMPR_FL)
-		stat->attributes |= STATX_ATTR_COMPRESSED;
 	if (IS_ENCRYPTED(inode))
 		stat->attributes |= STATX_ATTR_ENCRYPTED;
 	if (flags & F2FS_IMMUTABLE_FL)
@@ -735,7 +733,6 @@
 		stat->attributes |= STATX_ATTR_NODUMP;
 
 	stat->attributes_mask |= (STATX_ATTR_APPEND |
-				  STATX_ATTR_COMPRESSED |
 				  STATX_ATTR_ENCRYPTED |
 				  STATX_ATTR_IMMUTABLE |
 				  STATX_ATTR_NODUMP);
@@ -1041,7 +1038,7 @@
 			!f2fs_is_valid_blkaddr(sbi, *blkaddr,
 					DATA_GENERIC_ENHANCE)) {
 			f2fs_put_dnode(&dn);
-			return -EFAULT;
+			return -EFSCORRUPTED;
 		}
 
 		if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {
@@ -1229,7 +1226,7 @@
 static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
-	pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
+	pgoff_t nrpages = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 	pgoff_t start = offset >> PAGE_SHIFT;
 	pgoff_t end = (offset + len) >> PAGE_SHIFT;
 	int ret;
@@ -1482,7 +1479,7 @@
 	pg_start = offset >> PAGE_SHIFT;
 	pg_end = (offset + len) >> PAGE_SHIFT;
 	delta = pg_end - pg_start;
-	idx = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
+	idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 
 	/* avoid gc operation during block exchange */
 	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
@@ -1546,7 +1543,12 @@
 	if (off_end)
 		map.m_len++;
 
-	err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
+	if (f2fs_is_pinned_file(inode))
+		map.m_seg_type = CURSEG_COLD_DATA;
+
+	err = f2fs_map_blocks(inode, &map, 1, (f2fs_is_pinned_file(inode) ?
+						F2FS_GET_BLOCK_PRE_DIO :
+						F2FS_GET_BLOCK_PRE_AIO));
 	if (err) {
 		pgoff_t last_off;
 
@@ -1663,69 +1665,152 @@
 	return 0;
 }
 
+static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
+{
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+
+	/* Is it quota file? Do not allow user to mess with it */
+	if (IS_NOQUOTA(inode))
+		return -EPERM;
+
+	fi->i_flags = iflags | (fi->i_flags & ~mask);
+
+	if (fi->i_flags & F2FS_PROJINHERIT_FL)
+		set_inode_flag(inode, FI_PROJ_INHERIT);
+	else
+		clear_inode_flag(inode, FI_PROJ_INHERIT);
+
+	inode->i_ctime = current_time(inode);
+	f2fs_set_inode_flags(inode);
+	f2fs_mark_inode_dirty_sync(inode, true);
+	return 0;
+}
+
+/* FS_IOC_GETFLAGS and FS_IOC_SETFLAGS support */
+
+/*
+ * To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry
+ * for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to
+ * F2FS_GETTABLE_FS_FL.  To also make it settable via FS_IOC_SETFLAGS, also add
+ * its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL.
+ */
+
+static const struct {
+	u32 iflag;
+	u32 fsflag;
+} f2fs_fsflags_map[] = {
+	{ F2FS_SYNC_FL,		FS_SYNC_FL },
+	{ F2FS_IMMUTABLE_FL,	FS_IMMUTABLE_FL },
+	{ F2FS_APPEND_FL,	FS_APPEND_FL },
+	{ F2FS_NODUMP_FL,	FS_NODUMP_FL },
+	{ F2FS_NOATIME_FL,	FS_NOATIME_FL },
+	{ F2FS_INDEX_FL,	FS_INDEX_FL },
+	{ F2FS_DIRSYNC_FL,	FS_DIRSYNC_FL },
+	{ F2FS_PROJINHERIT_FL,	FS_PROJINHERIT_FL },
+};
+
+#define F2FS_GETTABLE_FS_FL (		\
+		FS_SYNC_FL |		\
+		FS_IMMUTABLE_FL |	\
+		FS_APPEND_FL |		\
+		FS_NODUMP_FL |		\
+		FS_NOATIME_FL |		\
+		FS_INDEX_FL |		\
+		FS_DIRSYNC_FL |		\
+		FS_PROJINHERIT_FL |	\
+		FS_ENCRYPT_FL |		\
+		FS_INLINE_DATA_FL |	\
+		FS_NOCOW_FL)
+
+#define F2FS_SETTABLE_FS_FL (		\
+		FS_SYNC_FL |		\
+		FS_IMMUTABLE_FL |	\
+		FS_APPEND_FL |		\
+		FS_NODUMP_FL |		\
+		FS_NOATIME_FL |		\
+		FS_DIRSYNC_FL |		\
+		FS_PROJINHERIT_FL)
+
+/* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */
+static inline u32 f2fs_iflags_to_fsflags(u32 iflags)
+{
+	u32 fsflags = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
+		if (iflags & f2fs_fsflags_map[i].iflag)
+			fsflags |= f2fs_fsflags_map[i].fsflag;
+
+	return fsflags;
+}
+
+/* Convert FS_IOC_{GET,SET}FLAGS flags to f2fs on-disk i_flags */
+static inline u32 f2fs_fsflags_to_iflags(u32 fsflags)
+{
+	u32 iflags = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
+		if (fsflags & f2fs_fsflags_map[i].fsflag)
+			iflags |= f2fs_fsflags_map[i].iflag;
+
+	return iflags;
+}
+
 static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
 {
 	struct inode *inode = file_inode(filp);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
-	unsigned int flags = fi->i_flags;
+	u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
 
 	if (IS_ENCRYPTED(inode))
-		flags |= F2FS_ENCRYPT_FL;
+		fsflags |= FS_ENCRYPT_FL;
 	if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
-		flags |= F2FS_INLINE_DATA_FL;
+		fsflags |= FS_INLINE_DATA_FL;
 	if (is_inode_flag_set(inode, FI_PIN_FILE))
-		flags |= F2FS_NOCOW_FL;
+		fsflags |= FS_NOCOW_FL;
 
-	flags &= F2FS_FL_USER_VISIBLE;
+	fsflags &= F2FS_GETTABLE_FS_FL;
 
-	return put_user(flags, (int __user *)arg);
+	return put_user(fsflags, (int __user *)arg);
 }
 
 static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
 {
 	struct inode *inode = file_inode(filp);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
-	unsigned int flags;
-	unsigned int oldflags;
+	u32 fsflags, old_fsflags;
+	u32 iflags;
 	int ret;
 
 	if (!inode_owner_or_capable(inode))
 		return -EACCES;
 
-	if (get_user(flags, (int __user *)arg))
+	if (get_user(fsflags, (int __user *)arg))
 		return -EFAULT;
 
+	if (fsflags & ~F2FS_GETTABLE_FS_FL)
+		return -EOPNOTSUPP;
+	fsflags &= F2FS_SETTABLE_FS_FL;
+
+	iflags = f2fs_fsflags_to_iflags(fsflags);
+	if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
+		return -EOPNOTSUPP;
+
 	ret = mnt_want_write_file(filp);
 	if (ret)
 		return ret;
 
 	inode_lock(inode);
 
-	/* Is it quota file? Do not allow user to mess with it */
-	if (IS_NOQUOTA(inode)) {
-		ret = -EPERM;
-		goto unlock_out;
-	}
+	old_fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
+	ret = vfs_ioc_setflags_prepare(inode, old_fsflags, fsflags);
+	if (ret)
+		goto out;
 
-	flags = f2fs_mask_flags(inode->i_mode, flags);
-
-	oldflags = fi->i_flags;
-
-	if ((flags ^ oldflags) & (F2FS_APPEND_FL | F2FS_IMMUTABLE_FL)) {
-		if (!capable(CAP_LINUX_IMMUTABLE)) {
-			ret = -EPERM;
-			goto unlock_out;
-		}
-	}
-
-	flags = flags & (F2FS_FL_USER_MODIFIABLE);
-	flags |= oldflags & ~(F2FS_FL_USER_MODIFIABLE);
-	fi->i_flags = flags;
-
-	inode->i_ctime = current_time(inode);
-	f2fs_set_inode_flags(inode);
-	f2fs_mark_inode_dirty_sync(inode, false);
-unlock_out:
+	ret = f2fs_setflags_common(inode, iflags,
+			f2fs_fsflags_to_iflags(F2FS_SETTABLE_FS_FL));
+out:
 	inode_unlock(inode);
 	mnt_drop_write_file(filp);
 	return ret;
@@ -1772,9 +1857,8 @@
 	 * f2fs_is_atomic_file.
 	 */
 	if (get_dirty_pages(inode))
-		f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING,
-		"Unexpected flush for atomic writes: ino=%lu, npages=%u",
-					inode->i_ino, get_dirty_pages(inode));
+		f2fs_warn(F2FS_I_SB(inode), "Unexpected flush for atomic writes: ino=%lu, npages=%u",
+			  inode->i_ino, get_dirty_pages(inode));
 	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
 	if (ret) {
 		up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
@@ -2209,8 +2293,7 @@
 		return -EROFS;
 
 	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"Skipping Checkpoint. Checkpoints currently disabled.");
+		f2fs_info(sbi, "Skipping Checkpoint. Checkpoints currently disabled.");
 		return -EINVAL;
 	}
 
@@ -2299,7 +2382,7 @@
 	if (!fragmented)
 		goto out;
 
-	sec_num = (total + BLKS_PER_SEC(sbi) - 1) / BLKS_PER_SEC(sbi);
+	sec_num = DIV_ROUND_UP(total, BLKS_PER_SEC(sbi));
 
 	/*
 	 * make sure there are enough free section for LFS allocation, this can
@@ -2595,10 +2678,8 @@
 
 	if (!f2fs_is_multi_device(sbi) || sbi->s_ndevs - 1 <= range.dev_num ||
 			__is_large_section(sbi)) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"Can't flush %u in %d for segs_per_sec %u != 1",
-				range.dev_num, sbi->s_ndevs,
-				sbi->segs_per_sec);
+		f2fs_warn(sbi, "Can't flush %u in %d for segs_per_sec %u != 1",
+			  range.dev_num, sbi->s_ndevs, sbi->segs_per_sec);
 		return -EINVAL;
 	}
 
@@ -2657,10 +2738,9 @@
 				fi->i_gc_failures[GC_FAILURE_PIN] + 1);
 
 	if (fi->i_gc_failures[GC_FAILURE_PIN] > sbi->gc_pin_file_threshold) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: Enable GC = ino %lx after %x GC trials",
-			__func__, inode->i_ino,
-			fi->i_gc_failures[GC_FAILURE_PIN]);
+		f2fs_warn(sbi, "%s: Enable GC = ino %lx after %x GC trials",
+			  __func__, inode->i_ino,
+			  fi->i_gc_failures[GC_FAILURE_PIN]);
 		clear_inode_flag(inode, FI_PIN_FILE);
 		return -EAGAIN;
 	}
@@ -2673,9 +2753,6 @@
 	__u32 pin;
 	int ret = 0;
 
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
 	if (get_user(pin, (__u32 __user *)arg))
 		return -EFAULT;
 
@@ -2768,6 +2845,27 @@
 	return f2fs_precache_extents(file_inode(filp));
 }
 
+static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
+	__u64 block_count;
+	int ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	if (copy_from_user(&block_count, (void __user *)arg,
+			   sizeof(block_count)))
+		return -EFAULT;
+
+	ret = f2fs_resize_fs(sbi, block_count);
+
+	return ret;
+}
+
 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
@@ -2820,6 +2918,8 @@
 		return f2fs_ioc_set_pin_file(filp, arg);
 	case F2FS_IOC_PRECACHE_EXTENTS:
 		return f2fs_ioc_precache_extents(filp, arg);
+	case F2FS_IOC_RESIZE_FS:
+		return f2fs_ioc_resize_fs(filp, arg);
 	default:
 		return -ENOTTY;
 	}
@@ -2931,6 +3031,7 @@
 	case F2FS_IOC_GET_PIN_FILE:
 	case F2FS_IOC_SET_PIN_FILE:
 	case F2FS_IOC_PRECACHE_EXTENTS:
+	case F2FS_IOC_RESIZE_FS:
 		break;
 	default:
 		return -ENOIOCTLCMD;
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 24b74d6..41a60aa 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -311,10 +311,11 @@
 	struct sit_info *sm = SIT_I(sbi);
 	struct victim_sel_policy p;
 	unsigned int secno, last_victim;
-	unsigned int last_segment = MAIN_SEGS(sbi);
+	unsigned int last_segment;
 	unsigned int nsearched = 0;
 
 	mutex_lock(&dirty_i->seglist_lock);
+	last_segment = MAIN_SECS(sbi) * sbi->segs_per_sec;
 
 	p.alloc_mode = alloc_mode;
 	select_policy(sbi, gc_type, type, &p);
@@ -387,7 +388,8 @@
 			goto next;
 		/* Don't touch checkpointed data */
 		if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
-					get_ckpt_valid_blocks(sbi, segno)))
+					get_ckpt_valid_blocks(sbi, segno) &&
+					p.alloc_mode != SSR))
 			goto next;
 		if (gc_type == BG_GC && test_bit(secno, dirty_i->victim_secmap))
 			goto next;
@@ -404,7 +406,8 @@
 				sm->last_victim[p.gc_mode] = last_victim + 1;
 			else
 				sm->last_victim[p.gc_mode] = segno + 1;
-			sm->last_victim[p.gc_mode] %= MAIN_SEGS(sbi);
+			sm->last_victim[p.gc_mode] %=
+				(MAIN_SECS(sbi) * sbi->segs_per_sec);
 			break;
 		}
 	}
@@ -615,9 +618,8 @@
 	}
 
 	if (sum->version != dni->version) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-				"%s: valid data with mismatched node version.",
-				__func__);
+		f2fs_warn(sbi, "%s: valid data with mismatched node version.",
+			  __func__);
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
 	}
 
@@ -658,7 +660,7 @@
 		dn.data_blkaddr = ei.blk + index - ei.fofs;
 		if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
 						DATA_GENERIC_ENHANCE_READ))) {
-			err = -EFAULT;
+			err = -EFSCORRUPTED;
 			goto put_page;
 		}
 		goto got_it;
@@ -676,7 +678,7 @@
 	}
 	if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
 						DATA_GENERIC_ENHANCE))) {
-		err = -EFAULT;
+		err = -EFSCORRUPTED;
 		goto put_page;
 	}
 got_it:
@@ -794,6 +796,29 @@
 	if (lfs_mode)
 		down_write(&fio.sbi->io_order_lock);
 
+	mpage = f2fs_grab_cache_page(META_MAPPING(fio.sbi),
+					fio.old_blkaddr, false);
+	if (!mpage)
+		goto up_out;
+
+	fio.encrypted_page = mpage;
+
+	/* read source block in mpage */
+	if (!PageUptodate(mpage)) {
+		err = f2fs_submit_page_bio(&fio);
+		if (err) {
+			f2fs_put_page(mpage, 1);
+			goto up_out;
+		}
+		lock_page(mpage);
+		if (unlikely(mpage->mapping != META_MAPPING(fio.sbi) ||
+						!PageUptodate(mpage))) {
+			err = -EIO;
+			f2fs_put_page(mpage, 1);
+			goto up_out;
+		}
+	}
+
 	f2fs_allocate_data_block(fio.sbi, NULL, fio.old_blkaddr, &newaddr,
 					&sum, CURSEG_COLD_DATA, NULL, false);
 
@@ -801,44 +826,18 @@
 				newaddr, FGP_LOCK | FGP_CREAT, GFP_NOFS);
 	if (!fio.encrypted_page) {
 		err = -ENOMEM;
+		f2fs_put_page(mpage, 1);
 		goto recover_block;
 	}
 
-	mpage = f2fs_pagecache_get_page(META_MAPPING(fio.sbi),
-					fio.old_blkaddr, FGP_LOCK, GFP_NOFS);
-	if (mpage) {
-		bool updated = false;
-
-		if (PageUptodate(mpage)) {
-			memcpy(page_address(fio.encrypted_page),
-					page_address(mpage), PAGE_SIZE);
-			updated = true;
-		}
-		f2fs_put_page(mpage, 1);
-		invalidate_mapping_pages(META_MAPPING(fio.sbi),
-					fio.old_blkaddr, fio.old_blkaddr);
-		if (updated)
-			goto write_page;
-	}
-
-	err = f2fs_submit_page_bio(&fio);
-	if (err)
-		goto put_page_out;
-
-	/* write page */
-	lock_page(fio.encrypted_page);
-
-	if (unlikely(fio.encrypted_page->mapping != META_MAPPING(fio.sbi))) {
-		err = -EIO;
-		goto put_page_out;
-	}
-	if (unlikely(!PageUptodate(fio.encrypted_page))) {
-		err = -EIO;
-		goto put_page_out;
-	}
-
-write_page:
+	/* write target block */
 	f2fs_wait_on_page_writeback(fio.encrypted_page, DATA, true, true);
+	memcpy(page_address(fio.encrypted_page),
+				page_address(mpage), PAGE_SIZE);
+	f2fs_put_page(mpage, 1);
+	invalidate_mapping_pages(META_MAPPING(fio.sbi),
+				fio.old_blkaddr, fio.old_blkaddr);
+
 	set_page_dirty(fio.encrypted_page);
 	if (clear_page_dirty_for_io(fio.encrypted_page))
 		dec_page_count(fio.sbi, F2FS_DIRTY_META);
@@ -869,11 +868,12 @@
 put_page_out:
 	f2fs_put_page(fio.encrypted_page, 1);
 recover_block:
-	if (lfs_mode)
-		up_write(&fio.sbi->io_order_lock);
 	if (err)
 		f2fs_do_replace_block(fio.sbi, &sum, newaddr, fio.old_blkaddr,
 								true, true);
+up_out:
+	if (lfs_mode)
+		up_write(&fio.sbi->io_order_lock);
 put_out:
 	f2fs_put_dnode(&dn);
 out:
@@ -1180,9 +1180,8 @@
 
 		sum = page_address(sum_page);
 		if (type != GET_SUM_TYPE((&sum->footer))) {
-			f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent segment (%u) "
-				"type [%d, %d] in SSA and SIT",
-				segno, type, GET_SUM_TYPE((&sum->footer)));
+			f2fs_err(sbi, "Inconsistent segment (%u) type [%d, %d] in SSA and SIT",
+				 segno, type, GET_SUM_TYPE((&sum->footer)));
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
 			f2fs_stop_checkpoint(sbi, false);
 			goto skip;
@@ -1360,3 +1359,176 @@
 		SIT_I(sbi)->last_victim[ALLOC_NEXT] =
 				GET_SEGNO(sbi, FDEV(0).end_blk) + 1;
 }
+
+static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start,
+							unsigned int end)
+{
+	int type;
+	unsigned int segno, next_inuse;
+	int err = 0;
+
+	/* Move out cursegs from the target range */
+	for (type = CURSEG_HOT_DATA; type < NR_CURSEG_TYPE; type++)
+		allocate_segment_for_resize(sbi, type, start, end);
+
+	/* do GC to move out valid blocks in the range */
+	for (segno = start; segno <= end; segno += sbi->segs_per_sec) {
+		struct gc_inode_list gc_list = {
+			.ilist = LIST_HEAD_INIT(gc_list.ilist),
+			.iroot = RADIX_TREE_INIT(GFP_NOFS),
+		};
+
+		mutex_lock(&sbi->gc_mutex);
+		do_garbage_collect(sbi, segno, &gc_list, FG_GC);
+		mutex_unlock(&sbi->gc_mutex);
+		put_gc_inode(&gc_list);
+
+		if (get_valid_blocks(sbi, segno, true))
+			return -EAGAIN;
+	}
+
+	err = f2fs_sync_fs(sbi->sb, 1);
+	if (err)
+		return err;
+
+	next_inuse = find_next_inuse(FREE_I(sbi), end + 1, start);
+	if (next_inuse <= end) {
+		f2fs_err(sbi, "segno %u should be free but still inuse!",
+			 next_inuse);
+		f2fs_bug_on(sbi, 1);
+	}
+	return err;
+}
+
+static void update_sb_metadata(struct f2fs_sb_info *sbi, int secs)
+{
+	struct f2fs_super_block *raw_sb = F2FS_RAW_SUPER(sbi);
+	int section_count = le32_to_cpu(raw_sb->section_count);
+	int segment_count = le32_to_cpu(raw_sb->segment_count);
+	int segment_count_main = le32_to_cpu(raw_sb->segment_count_main);
+	long long block_count = le64_to_cpu(raw_sb->block_count);
+	int segs = secs * sbi->segs_per_sec;
+
+	raw_sb->section_count = cpu_to_le32(section_count + secs);
+	raw_sb->segment_count = cpu_to_le32(segment_count + segs);
+	raw_sb->segment_count_main = cpu_to_le32(segment_count_main + segs);
+	raw_sb->block_count = cpu_to_le64(block_count +
+					(long long)segs * sbi->blocks_per_seg);
+}
+
+static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs)
+{
+	int segs = secs * sbi->segs_per_sec;
+	long long user_block_count =
+				le64_to_cpu(F2FS_CKPT(sbi)->user_block_count);
+
+	SM_I(sbi)->segment_count = (int)SM_I(sbi)->segment_count + segs;
+	MAIN_SEGS(sbi) = (int)MAIN_SEGS(sbi) + segs;
+	FREE_I(sbi)->free_sections = (int)FREE_I(sbi)->free_sections + secs;
+	FREE_I(sbi)->free_segments = (int)FREE_I(sbi)->free_segments + segs;
+	F2FS_CKPT(sbi)->user_block_count = cpu_to_le64(user_block_count +
+					(long long)segs * sbi->blocks_per_seg);
+}
+
+int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count)
+{
+	__u64 old_block_count, shrunk_blocks;
+	unsigned int secs;
+	int gc_mode, gc_type;
+	int err = 0;
+	__u32 rem;
+
+	old_block_count = le64_to_cpu(F2FS_RAW_SUPER(sbi)->block_count);
+	if (block_count > old_block_count)
+		return -EINVAL;
+
+	/* new fs size should align to section size */
+	div_u64_rem(block_count, BLKS_PER_SEC(sbi), &rem);
+	if (rem)
+		return -EINVAL;
+
+	if (block_count == old_block_count)
+		return 0;
+
+	if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
+		f2fs_err(sbi, "Should run fsck to repair first.");
+		return -EFSCORRUPTED;
+	}
+
+	if (test_opt(sbi, DISABLE_CHECKPOINT)) {
+		f2fs_err(sbi, "Checkpoint should be enabled.");
+		return -EINVAL;
+	}
+
+	freeze_bdev(sbi->sb->s_bdev);
+
+	shrunk_blocks = old_block_count - block_count;
+	secs = div_u64(shrunk_blocks, BLKS_PER_SEC(sbi));
+	spin_lock(&sbi->stat_lock);
+	if (shrunk_blocks + valid_user_blocks(sbi) +
+		sbi->current_reserved_blocks + sbi->unusable_block_count +
+		F2FS_OPTION(sbi).root_reserved_blocks > sbi->user_block_count)
+		err = -ENOSPC;
+	else
+		sbi->user_block_count -= shrunk_blocks;
+	spin_unlock(&sbi->stat_lock);
+	if (err) {
+		thaw_bdev(sbi->sb->s_bdev, sbi->sb);
+		return err;
+	}
+
+	mutex_lock(&sbi->resize_mutex);
+	set_sbi_flag(sbi, SBI_IS_RESIZEFS);
+
+	mutex_lock(&DIRTY_I(sbi)->seglist_lock);
+
+	MAIN_SECS(sbi) -= secs;
+
+	for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++)
+		if (SIT_I(sbi)->last_victim[gc_mode] >=
+					MAIN_SECS(sbi) * sbi->segs_per_sec)
+			SIT_I(sbi)->last_victim[gc_mode] = 0;
+
+	for (gc_type = BG_GC; gc_type <= FG_GC; gc_type++)
+		if (sbi->next_victim_seg[gc_type] >=
+					MAIN_SECS(sbi) * sbi->segs_per_sec)
+			sbi->next_victim_seg[gc_type] = NULL_SEGNO;
+
+	mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
+
+	err = free_segment_range(sbi, MAIN_SECS(sbi) * sbi->segs_per_sec,
+			MAIN_SEGS(sbi) - 1);
+	if (err)
+		goto out;
+
+	update_sb_metadata(sbi, -secs);
+
+	err = f2fs_commit_super(sbi, false);
+	if (err) {
+		update_sb_metadata(sbi, secs);
+		goto out;
+	}
+
+	update_fs_metadata(sbi, -secs);
+	clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
+	err = f2fs_sync_fs(sbi->sb, 1);
+	if (err) {
+		update_fs_metadata(sbi, secs);
+		update_sb_metadata(sbi, secs);
+		f2fs_commit_super(sbi, false);
+	}
+out:
+	if (err) {
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		f2fs_err(sbi, "resize_fs failed, should run fsck to repair!");
+
+		MAIN_SECS(sbi) += secs;
+		spin_lock(&sbi->stat_lock);
+		sbi->user_block_count += shrunk_blocks;
+		spin_unlock(&sbi->stat_lock);
+	}
+	clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
+	mutex_unlock(&sbi->resize_mutex);
+	thaw_bdev(sbi->sb->s_bdev, sbi->sb);
+	return err;
+}
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index d67622c..2b40293 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -158,11 +158,9 @@
 	if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
 		f2fs_put_dnode(dn);
 		set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
-		f2fs_msg(fio.sbi->sb, KERN_WARNING,
-			"%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
-			"run fsck to fix.",
-			__func__, dn->inode->i_ino, dn->data_blkaddr);
-		return -EINVAL;
+		f2fs_warn(fio.sbi, "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
+			  __func__, dn->inode->i_ino, dn->data_blkaddr);
+		return -EFSCORRUPTED;
 	}
 
 	f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
@@ -401,11 +399,9 @@
 	if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
 		f2fs_put_dnode(&dn);
 		set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
-		f2fs_msg(F2FS_P_SB(page)->sb, KERN_WARNING,
-			"%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
-			"run fsck to fix.",
-			__func__, dir->i_ino, dn.data_blkaddr);
-		err = -EINVAL;
+		f2fs_warn(F2FS_P_SB(page), "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
+			  __func__, dir->i_ino, dn.data_blkaddr);
+		err = -EFSCORRUPTED;
 		goto out;
 	}
 
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index ccb0222..a33d7a8 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -74,7 +74,7 @@
 	if (!__is_valid_data_blkaddr(addr))
 		return 1;
 	if (!f2fs_is_valid_blkaddr(sbi, addr, DATA_GENERIC_ENHANCE))
-		return -EFAULT;
+		return -EFSCORRUPTED;
 	return 0;
 }
 
@@ -176,9 +176,8 @@
 	calculated = f2fs_inode_chksum(sbi, page);
 
 	if (provided != calculated)
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"checksum invalid, nid = %lu, ino_of_node = %x, %x vs. %x",
-			page->index, ino_of_node(page), provided, calculated);
+		f2fs_warn(sbi, "checksum invalid, nid = %lu, ino_of_node = %x, %x vs. %x",
+			  page->index, ino_of_node(page), provided, calculated);
 
 	return provided == calculated;
 }
@@ -202,50 +201,41 @@
 	iblocks = le64_to_cpu(F2FS_INODE(node_page)->i_blocks);
 	if (!iblocks) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: corrupted inode i_blocks i_ino=%lx iblocks=%llu, "
-			"run fsck to fix.",
-			__func__, inode->i_ino, iblocks);
+		f2fs_warn(sbi, "%s: corrupted inode i_blocks i_ino=%lx iblocks=%llu, run fsck to fix.",
+			  __func__, inode->i_ino, iblocks);
 		return false;
 	}
 
 	if (ino_of_node(node_page) != nid_of_node(node_page)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: corrupted inode footer i_ino=%lx, ino,nid: "
-			"[%u, %u] run fsck to fix.",
-			__func__, inode->i_ino,
-			ino_of_node(node_page), nid_of_node(node_page));
+		f2fs_warn(sbi, "%s: corrupted inode footer i_ino=%lx, ino,nid: [%u, %u] run fsck to fix.",
+			  __func__, inode->i_ino,
+			  ino_of_node(node_page), nid_of_node(node_page));
 		return false;
 	}
 
 	if (f2fs_sb_has_flexible_inline_xattr(sbi)
 			&& !f2fs_has_extra_attr(inode)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: corrupted inode ino=%lx, run fsck to fix.",
-			__func__, inode->i_ino);
+		f2fs_warn(sbi, "%s: corrupted inode ino=%lx, run fsck to fix.",
+			  __func__, inode->i_ino);
 		return false;
 	}
 
 	if (f2fs_has_extra_attr(inode) &&
 			!f2fs_sb_has_extra_attr(sbi)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: inode (ino=%lx) is with extra_attr, "
-			"but extra_attr feature is off",
-			__func__, inode->i_ino);
+		f2fs_warn(sbi, "%s: inode (ino=%lx) is with extra_attr, but extra_attr feature is off",
+			  __func__, inode->i_ino);
 		return false;
 	}
 
 	if (fi->i_extra_isize > F2FS_TOTAL_EXTRA_ATTR_SIZE ||
 			fi->i_extra_isize % sizeof(__le32)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: inode (ino=%lx) has corrupted i_extra_isize: %d, "
-			"max: %zu",
-			__func__, inode->i_ino, fi->i_extra_isize,
-			F2FS_TOTAL_EXTRA_ATTR_SIZE);
+		f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_extra_isize: %d, max: %zu",
+			  __func__, inode->i_ino, fi->i_extra_isize,
+			  F2FS_TOTAL_EXTRA_ATTR_SIZE);
 		return false;
 	}
 
@@ -255,11 +245,9 @@
 		(!fi->i_inline_xattr_size ||
 		fi->i_inline_xattr_size > MAX_INLINE_XATTR_SIZE)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: inode (ino=%lx) has corrupted "
-			"i_inline_xattr_size: %d, max: %zu",
-			__func__, inode->i_ino, fi->i_inline_xattr_size,
-			MAX_INLINE_XATTR_SIZE);
+		f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_inline_xattr_size: %d, max: %zu",
+			  __func__, inode->i_ino, fi->i_inline_xattr_size,
+			  MAX_INLINE_XATTR_SIZE);
 		return false;
 	}
 
@@ -272,11 +260,9 @@
 			!f2fs_is_valid_blkaddr(sbi, ei->blk + ei->len - 1,
 						DATA_GENERIC_ENHANCE))) {
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"%s: inode (ino=%lx) extent info [%u, %u, %u] "
-				"is incorrect, run fsck to fix",
-				__func__, inode->i_ino,
-				ei->blk, ei->fofs, ei->len);
+			f2fs_warn(sbi, "%s: inode (ino=%lx) extent info [%u, %u, %u] is incorrect, run fsck to fix",
+				  __func__, inode->i_ino,
+				  ei->blk, ei->fofs, ei->len);
 			return false;
 		}
 	}
@@ -284,19 +270,15 @@
 	if (f2fs_has_inline_data(inode) &&
 			(!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: inode (ino=%lx, mode=%u) should not have "
-			"inline_data, run fsck to fix",
-			__func__, inode->i_ino, inode->i_mode);
+		f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_data, run fsck to fix",
+			  __func__, inode->i_ino, inode->i_mode);
 		return false;
 	}
 
 	if (f2fs_has_inline_dentry(inode) && !S_ISDIR(inode->i_mode)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: inode (ino=%lx, mode=%u) should not have "
-			"inline_dentry, run fsck to fix",
-			__func__, inode->i_ino, inode->i_mode);
+		f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_dentry, run fsck to fix",
+			  __func__, inode->i_ino, inode->i_mode);
 		return false;
 	}
 
@@ -343,6 +325,8 @@
 					le16_to_cpu(ri->i_gc_failures);
 	fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
 	fi->i_flags = le32_to_cpu(ri->i_flags);
+	if (S_ISREG(inode->i_mode))
+		fi->i_flags &= ~F2FS_PROJINHERIT_FL;
 	fi->flags = 0;
 	fi->i_advise = ri->i_advise;
 	fi->i_pino = le32_to_cpu(ri->i_pino);
@@ -374,7 +358,7 @@
 
 	if (!sanity_check_inode(inode, node_page)) {
 		f2fs_put_page(node_page, 1);
-		return -EINVAL;
+		return -EFSCORRUPTED;
 	}
 
 	/* check data exist */
@@ -783,8 +767,7 @@
 	err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
 	if (err) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"May loss orphan inode, run fsck to fix.");
+		f2fs_warn(sbi, "May loss orphan inode, run fsck to fix.");
 		goto out;
 	}
 
@@ -792,8 +775,7 @@
 		err = f2fs_acquire_orphan_inode(sbi);
 		if (err) {
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"Too many orphan inodes, run fsck to fix.");
+			f2fs_warn(sbi, "Too many orphan inodes, run fsck to fix.");
 		} else {
 			f2fs_add_orphan_inode(inode);
 		}
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index b70ab57..acec146 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -385,9 +385,8 @@
 	int err = 0;
 
 	if (f2fs_readonly(sbi->sb)) {
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"skip recovering inline_dots inode (ino:%lu, pino:%u) "
-			"in readonly mountpoint", dir->i_ino, pino);
+		f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
+			  dir->i_ino, pino);
 		return 0;
 	}
 
@@ -436,19 +435,23 @@
 	nid_t ino = -1;
 	int err = 0;
 	unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
+	struct fscrypt_name fname;
 
 	trace_f2fs_lookup_start(dir, dentry, flags);
 
-	err = fscrypt_prepare_lookup(dir, dentry, flags);
-	if (err)
-		goto out;
-
 	if (dentry->d_name.len > F2FS_NAME_LEN) {
 		err = -ENAMETOOLONG;
 		goto out;
 	}
 
-	de = f2fs_find_entry(dir, &dentry->d_name, &page);
+	err = fscrypt_prepare_lookup(dir, dentry, &fname);
+	if (err == -ENOENT)
+		goto out_splice;
+	if (err)
+		goto out;
+	de = __f2fs_find_entry(dir, &fname, &page);
+	fscrypt_free_filename(&fname);
+
 	if (!de) {
 		if (IS_ERR(page)) {
 			err = PTR_ERR(page);
@@ -480,16 +483,14 @@
 	if (IS_ENCRYPTED(dir) &&
 	    (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
 	    !fscrypt_has_permitted_context(dir, inode)) {
-		f2fs_msg(inode->i_sb, KERN_WARNING,
-			 "Inconsistent encryption contexts: %lu/%lu",
-			 dir->i_ino, inode->i_ino);
+		f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
+			  dir->i_ino, inode->i_ino);
 		err = -EPERM;
 		goto out_iput;
 	}
 out_splice:
 	new = d_splice_alias(inode, dentry);
-	if (IS_ERR(new))
-		err = PTR_ERR(new);
+	err = PTR_ERR_OR_ZERO(new);
 	trace_f2fs_lookup_end(dir, dentry, ino, err);
 	return new;
 out_iput:
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 6e8f75e1..5bb30bd 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -34,10 +34,9 @@
 {
 	if (unlikely(nid < F2FS_ROOT_INO(sbi) || nid >= NM_I(sbi)->max_nid)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-				"%s: out-of-range nid=%x, run fsck to fix.",
-				__func__, nid);
-		return -EINVAL;
+		f2fs_warn(sbi, "%s: out-of-range nid=%x, run fsck to fix.",
+			  __func__, nid);
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
@@ -1187,10 +1186,8 @@
 	}
 
 	if (unlikely(inode->i_blocks != 0 && inode->i_blocks != 8)) {
-		f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING,
-			"Inconsistent i_blocks, ino:%lu, iblocks:%llu",
-			inode->i_ino,
-			(unsigned long long)inode->i_blocks);
+		f2fs_warn(F2FS_I_SB(inode), "Inconsistent i_blocks, ino:%lu, iblocks:%llu",
+			  inode->i_ino, (unsigned long long)inode->i_blocks);
 		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
 	}
 
@@ -1289,7 +1286,7 @@
 	if (PageUptodate(page)) {
 		if (!f2fs_inode_chksum_verify(sbi, page)) {
 			ClearPageUptodate(page);
-			return -EBADMSG;
+			return -EFSBADCRC;
 		}
 		return LOCKED_PAGE;
 	}
@@ -1375,16 +1372,15 @@
 	}
 
 	if (!f2fs_inode_chksum_verify(sbi, page)) {
-		err = -EBADMSG;
+		err = -EFSBADCRC;
 		goto out_err;
 	}
 page_hit:
 	if(unlikely(nid != nid_of_node(page))) {
-		f2fs_msg(sbi->sb, KERN_WARNING, "inconsistent node block, "
-			"nid:%lu, node_footer[nid:%u,ino:%u,ofs:%u,cpver:%llu,blkaddr:%u]",
-			nid, nid_of_node(page), ino_of_node(page),
-			ofs_of_node(page), cpver_of_node(page),
-			next_blkaddr_of_node(page));
+		f2fs_warn(sbi, "inconsistent node block, nid:%lu, node_footer[nid:%u,ino:%u,ofs:%u,cpver:%llu,blkaddr:%u]",
+			  nid, nid_of_node(page), ino_of_node(page),
+			  ofs_of_node(page), cpver_of_node(page),
+			  next_blkaddr_of_node(page));
 		err = -EINVAL;
 out_err:
 		ClearPageUptodate(page);
@@ -1752,9 +1748,8 @@
 			break;
 	}
 	if (!ret && atomic && !marked) {
-		f2fs_msg(sbi->sb, KERN_DEBUG,
-			"Retry to write fsync mark: ino=%u, idx=%lx",
-					ino, last_page->index);
+		f2fs_debug(sbi, "Retry to write fsync mark: ino=%u, idx=%lx",
+			   ino, last_page->index);
 		lock_page(last_page);
 		f2fs_wait_on_page_writeback(last_page, NODE, true, true);
 		set_page_dirty(last_page);
@@ -2304,8 +2299,7 @@
 			if (ret) {
 				up_read(&nm_i->nat_tree_lock);
 				f2fs_bug_on(sbi, !mount);
-				f2fs_msg(sbi->sb, KERN_ERR,
-					"NAT is corrupt, run fsck to fix it");
+				f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
 				return ret;
 			}
 		}
@@ -2725,7 +2719,7 @@
 		i = 1;
 	}
 	for (; i < NAT_ENTRY_PER_BLOCK; i++) {
-		if (nat_blk->entries[i].block_addr != NULL_ADDR)
+		if (le32_to_cpu(nat_blk->entries[i].block_addr) != NULL_ADDR)
 			valid++;
 	}
 	if (valid == 0) {
@@ -2915,7 +2909,7 @@
 	nm_i->full_nat_bits = nm_i->nat_bits + 8;
 	nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
 
-	f2fs_msg(sbi->sb, KERN_NOTICE, "Found nat_bits in checkpoint");
+	f2fs_notice(sbi, "Found nat_bits in checkpoint");
 	return 0;
 }
 
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 1217501..bd1ff49 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -188,10 +188,9 @@
 		name = "<encrypted>";
 	else
 		name = raw_inode->i_name;
-	f2fs_msg(inode->i_sb, KERN_NOTICE,
-			"%s: ino = %x, name = %s, dir = %lx, err = %d",
-			__func__, ino_of_node(ipage), name,
-			IS_ERR(dir) ? 0 : dir->i_ino, err);
+	f2fs_notice(F2FS_I_SB(inode), "%s: ino = %x, name = %s, dir = %lx, err = %d",
+		    __func__, ino_of_node(ipage), name,
+		    IS_ERR(dir) ? 0 : dir->i_ino, err);
 	return err;
 }
 
@@ -284,9 +283,8 @@
 	else
 		name = F2FS_INODE(page)->i_name;
 
-	f2fs_msg(inode->i_sb, KERN_NOTICE,
-		"recover_inode: ino = %x, name = %s, inline = %x",
-			ino_of_node(page), name, raw->i_inline);
+	f2fs_notice(F2FS_I_SB(inode), "recover_inode: ino = %x, name = %s, inline = %x",
+		    ino_of_node(page), name, raw->i_inline);
 	return 0;
 }
 
@@ -363,10 +361,9 @@
 		/* sanity check in order to detect looped node chain */
 		if (++loop_cnt >= free_blocks ||
 			blkaddr == next_blkaddr_of_node(page)) {
-			f2fs_msg(sbi->sb, KERN_NOTICE,
-				"%s: detect looped node chain, "
-				"blkaddr:%u, next:%u",
-				__func__, blkaddr, next_blkaddr_of_node(page));
+			f2fs_notice(sbi, "%s: detect looped node chain, blkaddr:%u, next:%u",
+				    __func__, blkaddr,
+				    next_blkaddr_of_node(page));
 			f2fs_put_page(page, 1);
 			err = -EINVAL;
 			break;
@@ -545,11 +542,10 @@
 	f2fs_bug_on(sbi, ni.ino != ino_of_node(page));
 
 	if (ofs_of_node(dn.node_page) != ofs_of_node(page)) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u",
-			inode->i_ino, ofs_of_node(dn.node_page),
-			ofs_of_node(page));
-		err = -EFAULT;
+		f2fs_warn(sbi, "Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u",
+			  inode->i_ino, ofs_of_node(dn.node_page),
+			  ofs_of_node(page));
+		err = -EFSCORRUPTED;
 		goto err;
 	}
 
@@ -561,13 +557,13 @@
 
 		if (__is_valid_data_blkaddr(src) &&
 			!f2fs_is_valid_blkaddr(sbi, src, META_POR)) {
-			err = -EFAULT;
+			err = -EFSCORRUPTED;
 			goto err;
 		}
 
 		if (__is_valid_data_blkaddr(dest) &&
 			!f2fs_is_valid_blkaddr(sbi, dest, META_POR)) {
-			err = -EFAULT;
+			err = -EFSCORRUPTED;
 			goto err;
 		}
 
@@ -634,11 +630,9 @@
 err:
 	f2fs_put_dnode(&dn);
 out:
-	f2fs_msg(sbi->sb, KERN_NOTICE,
-		"recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d",
-		inode->i_ino,
-		file_keep_isize(inode) ? "keep" : "recover",
-		recovered, err);
+	f2fs_notice(sbi, "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d",
+		    inode->i_ino, file_keep_isize(inode) ? "keep" : "recover",
+		    recovered, err);
 	return err;
 }
 
@@ -726,8 +720,7 @@
 #endif
 
 	if (s_flags & MS_RDONLY) {
-		f2fs_msg(sbi->sb, KERN_INFO,
-				"recover fsync data on readonly fs");
+		f2fs_info(sbi, "recover fsync data on readonly fs");
 		sbi->sb->s_flags &= ~MS_RDONLY;
 	}
 
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 2a8dc33..bdec193 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -546,9 +546,13 @@
 		if (test_opt(sbi, DATA_FLUSH)) {
 			struct blk_plug plug;
 
+			mutex_lock(&sbi->flush_lock);
+
 			blk_start_plug(&plug);
 			f2fs_sync_dirty_inodes(sbi, FILE_INODE);
 			blk_finish_plug(&plug);
+
+			mutex_unlock(&sbi->flush_lock);
 		}
 		f2fs_sync_fs(sbi->sb, true);
 		stat_inc_bg_cp_count(sbi->stat_info);
@@ -869,11 +873,14 @@
 	mutex_unlock(&dirty_i->seglist_lock);
 }
 
-int f2fs_disable_cp_again(struct f2fs_sb_info *sbi)
+block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi)
 {
+	int ovp_hole_segs =
+		(overprovision_segments(sbi) - reserved_segments(sbi));
+	block_t ovp_holes = ovp_hole_segs << sbi->log_blocks_per_seg;
 	struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
-	block_t ovp = overprovision_segments(sbi) << sbi->log_blocks_per_seg;
 	block_t holes[2] = {0, 0};	/* DATA and NODE */
+	block_t unusable;
 	struct seg_entry *se;
 	unsigned int segno;
 
@@ -887,10 +894,20 @@
 	}
 	mutex_unlock(&dirty_i->seglist_lock);
 
-	if (holes[DATA] > ovp || holes[NODE] > ovp)
+	unusable = holes[DATA] > holes[NODE] ? holes[DATA] : holes[NODE];
+	if (unusable > ovp_holes)
+		return unusable - ovp_holes;
+	return 0;
+}
+
+int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable)
+{
+	int ovp_hole_segs =
+		(overprovision_segments(sbi) - reserved_segments(sbi));
+	if (unusable > F2FS_OPTION(sbi).unusable_cap)
 		return -EAGAIN;
 	if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK) &&
-		dirty_segments(sbi) > overprovision_segments(sbi))
+		dirty_segments(sbi) > ovp_hole_segs)
 		return -EAGAIN;
 	return 0;
 }
@@ -1476,6 +1493,10 @@
 		list_for_each_entry_safe(dc, tmp, pend_list, list) {
 			f2fs_bug_on(sbi, dc->state != D_PREP);
 
+			if (dpolicy->timeout != 0 &&
+				f2fs_time_over(sbi, dpolicy->timeout))
+				break;
+
 			if (dpolicy->io_aware && i < dpolicy->io_aware_gran &&
 						!is_idle(sbi, DISCARD_TIME)) {
 				io_interrupted = true;
@@ -1736,8 +1757,7 @@
 		devi = f2fs_target_device_index(sbi, blkstart);
 		if (blkstart < FDEV(devi).start_blk ||
 		    blkstart > FDEV(devi).end_blk) {
-			f2fs_msg(sbi->sb, KERN_ERR, "Invalid block %x",
-				 blkstart);
+			f2fs_err(sbi, "Invalid block %x", blkstart);
 			return -EIO;
 		}
 		blkstart -= FDEV(devi).start_blk;
@@ -1750,10 +1770,9 @@
 
 		if (sector & (bdev_zone_sectors(bdev) - 1) ||
 				nr_sects != bdev_zone_sectors(bdev)) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-				"(%d) %s: Unaligned zone reset attempted (block %x + %x)",
-				devi, sbi->s_ndevs ? FDEV(devi).path: "",
-				blkstart, blklen);
+			f2fs_err(sbi, "(%d) %s: Unaligned zone reset attempted (block %x + %x)",
+				 devi, sbi->s_ndevs ? FDEV(devi).path : "",
+				 blkstart, blklen);
 			return -EIO;
 		}
 		trace_f2fs_issue_reset_zone(bdev, blkstart);
@@ -2117,15 +2136,14 @@
 		mir_exist = f2fs_test_and_set_bit(offset,
 						se->cur_valid_map_mir);
 		if (unlikely(exist != mir_exist)) {
-			f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error "
-				"when setting bitmap, blk:%u, old bit:%d",
-				blkaddr, exist);
+			f2fs_err(sbi, "Inconsistent error when setting bitmap, blk:%u, old bit:%d",
+				 blkaddr, exist);
 			f2fs_bug_on(sbi, 1);
 		}
 #endif
 		if (unlikely(exist)) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-				"Bitmap was wrongly set, blk:%u", blkaddr);
+			f2fs_err(sbi, "Bitmap was wrongly set, blk:%u",
+				 blkaddr);
 			f2fs_bug_on(sbi, 1);
 			se->valid_blocks--;
 			del = 0;
@@ -2146,15 +2164,14 @@
 		mir_exist = f2fs_test_and_clear_bit(offset,
 						se->cur_valid_map_mir);
 		if (unlikely(exist != mir_exist)) {
-			f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error "
-				"when clearing bitmap, blk:%u, old bit:%d",
-				blkaddr, exist);
+			f2fs_err(sbi, "Inconsistent error when clearing bitmap, blk:%u, old bit:%d",
+				 blkaddr, exist);
 			f2fs_bug_on(sbi, 1);
 		}
 #endif
 		if (unlikely(!exist)) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-				"Bitmap was wrongly cleared, blk:%u", blkaddr);
+			f2fs_err(sbi, "Bitmap was wrongly cleared, blk:%u",
+				 blkaddr);
 			f2fs_bug_on(sbi, 1);
 			se->valid_blocks++;
 			del = 0;
@@ -2636,6 +2653,39 @@
 	stat_inc_seg_type(sbi, curseg);
 }
 
+void allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
+					unsigned int start, unsigned int end)
+{
+	struct curseg_info *curseg = CURSEG_I(sbi, type);
+	unsigned int segno;
+
+	down_read(&SM_I(sbi)->curseg_lock);
+	mutex_lock(&curseg->curseg_mutex);
+	down_write(&SIT_I(sbi)->sentry_lock);
+
+	segno = CURSEG_I(sbi, type)->segno;
+	if (segno < start || segno > end)
+		goto unlock;
+
+	if (f2fs_need_SSR(sbi) && get_ssr_segment(sbi, type))
+		change_curseg(sbi, type);
+	else
+		new_curseg(sbi, type, true);
+
+	stat_inc_seg_type(sbi, curseg);
+
+	locate_dirty_segment(sbi, segno);
+unlock:
+	up_write(&SIT_I(sbi)->sentry_lock);
+
+	if (segno != curseg->segno)
+		f2fs_notice(sbi, "For resize: curseg of type %d: %u ==> %u",
+			    type, segno, curseg->segno);
+
+	mutex_unlock(&curseg->curseg_mutex);
+	up_read(&SM_I(sbi)->curseg_lock);
+}
+
 void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
 {
 	struct curseg_info *curseg;
@@ -2768,9 +2818,8 @@
 		goto out;
 
 	if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"Found FS corruption, run fsck to fix.");
-		return -EIO;
+		f2fs_warn(sbi, "Found FS corruption, run fsck to fix.");
+		return -EFSCORRUPTED;
 	}
 
 	/* start/end segment number in main_area */
@@ -3194,12 +3243,17 @@
 
 	if (!IS_DATASEG(get_seg_entry(sbi, segno)->type)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		return -EFAULT;
+		f2fs_warn(sbi, "%s: incorrect segment(%u) type, run fsck to fix.",
+			  __func__, segno);
+		return -EFSCORRUPTED;
 	}
 
 	stat_inc_inplace_blocks(fio->sbi);
 
-	err = f2fs_submit_page_bio(fio);
+	if (fio->bio)
+		err = f2fs_merge_page_bio(fio);
+	else
+		err = f2fs_submit_page_bio(fio);
 	if (!err) {
 		update_device_state(fio);
 		f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
@@ -3390,6 +3444,11 @@
 		seg_i = CURSEG_I(sbi, i);
 		segno = le32_to_cpu(ckpt->cur_data_segno[i]);
 		blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
+		if (blk_off > ENTRIES_IN_SUM) {
+			f2fs_bug_on(sbi, 1);
+			f2fs_put_page(page, 1);
+			return -EFAULT;
+		}
 		seg_i->next_segno = segno;
 		reset_curseg(sbi, i, 0);
 		seg_i->alloc_type = ckpt->alloc_type[i];
@@ -3527,8 +3586,11 @@
 
 	/* sanity check for summary blocks */
 	if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES ||
-			sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES)
+			sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES) {
+		f2fs_err(sbi, "invalid journal entries nats %u sits %u\n",
+			 nats_in_cursum(nat_j), sits_in_cursum(sit_j));
 		return -EINVAL;
+	}
 
 	return 0;
 }
@@ -3759,7 +3821,7 @@
 	struct f2fs_journal *journal = curseg->journal;
 	struct sit_entry_set *ses, *tmp;
 	struct list_head *head = &SM_I(sbi)->sit_entry_set;
-	bool to_journal = true;
+	bool to_journal = !is_sbi_flag_set(sbi, SBI_IS_RESIZEFS);
 	struct seg_entry *se;
 
 	down_write(&sit_i->sentry_lock);
@@ -3778,7 +3840,8 @@
 	 * entries, remove all entries from journal and add and account
 	 * them in sit entry set.
 	 */
-	if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL))
+	if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL) ||
+								!to_journal)
 		remove_sits_in_journal(sbi);
 
 	/*
@@ -4093,11 +4156,10 @@
 
 		start = le32_to_cpu(segno_in_journal(journal, i));
 		if (start >= MAIN_SEGS(sbi)) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-					"Wrong journal entry on segno %u",
-					start);
+			f2fs_err(sbi, "Wrong journal entry on segno %u",
+				 start);
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
-			err = -EINVAL;
+			err = -EFSCORRUPTED;
 			break;
 		}
 
@@ -4134,11 +4196,10 @@
 	up_read(&curseg->journal_rwsem);
 
 	if (!err && total_node_blocks != valid_node_count(sbi)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"SIT is corrupted node# %u vs %u",
-			total_node_blocks, valid_node_count(sbi));
+		f2fs_err(sbi, "SIT is corrupted node# %u vs %u",
+			 total_node_blocks, valid_node_count(sbi));
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		err = -EINVAL;
+		err = -EFSCORRUPTED;
 	}
 
 	return err;
@@ -4229,6 +4290,39 @@
 	return init_victim_secmap(sbi);
 }
 
+static int sanity_check_curseg(struct f2fs_sb_info *sbi)
+{
+	int i;
+
+	/*
+	 * In LFS/SSR curseg, .next_blkoff should point to an unused blkaddr;
+	 * In LFS curseg, all blkaddr after .next_blkoff should be unused.
+	 */
+	for (i = 0; i < NO_CHECK_TYPE; i++) {
+		struct curseg_info *curseg = CURSEG_I(sbi, i);
+		struct seg_entry *se = get_seg_entry(sbi, curseg->segno);
+		unsigned int blkofs = curseg->next_blkoff;
+
+		if (f2fs_test_bit(blkofs, se->cur_valid_map))
+			goto out;
+
+		if (curseg->alloc_type == SSR)
+			continue;
+
+		for (blkofs += 1; blkofs < sbi->blocks_per_seg; blkofs++) {
+			if (!f2fs_test_bit(blkofs, se->cur_valid_map))
+				continue;
+out:
+			f2fs_err(sbi,
+				 "Current segment's next free block offset is inconsistent with bitmap, logtype:%u, segno:%u, type:%u, next_blkoff:%u, blkofs:%u",
+				 i, curseg->segno, curseg->alloc_type,
+				 curseg->next_blkoff, blkofs);
+			return -EFSCORRUPTED;
+		}
+	}
+	return 0;
+}
+
 /*
  * Update min, max modified time for cost-benefit GC algorithm
  */
@@ -4324,6 +4418,10 @@
 	if (err)
 		return err;
 
+	err = sanity_check_curseg(sbi);
+	if (err)
+		return err;
+
 	init_min_max_mtime(sbi);
 	return 0;
 }
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 429007b..b746028 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -109,7 +109,7 @@
 #define	START_SEGNO(segno)		\
 	(SIT_BLOCK_OFFSET(segno) * SIT_ENTRY_PER_BLOCK)
 #define SIT_BLK_CNT(sbi)			\
-	((MAIN_SEGS(sbi) + SIT_ENTRY_PER_BLOCK - 1) / SIT_ENTRY_PER_BLOCK)
+	DIV_ROUND_UP(MAIN_SEGS(sbi), SIT_ENTRY_PER_BLOCK)
 #define f2fs_bitmap_size(nr)			\
 	(BITS_TO_LONGS(nr) * sizeof(unsigned long))
 
@@ -693,21 +693,19 @@
 	} while (cur_pos < sbi->blocks_per_seg);
 
 	if (unlikely(GET_SIT_VBLOCKS(raw_sit) != valid_blocks)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-				"Mismatch valid blocks %d vs. %d",
-					GET_SIT_VBLOCKS(raw_sit), valid_blocks);
+		f2fs_err(sbi, "Mismatch valid blocks %d vs. %d",
+			 GET_SIT_VBLOCKS(raw_sit), valid_blocks);
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		return -EINVAL;
+		return -EFSCORRUPTED;
 	}
 
 	/* check segment usage, and check boundary of a given segment number */
 	if (unlikely(GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg
 					|| segno > TOTAL_SEGS(sbi) - 1)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-				"Wrong valid blocks %d or segno %u",
-					GET_SIT_VBLOCKS(raw_sit), segno);
+		f2fs_err(sbi, "Wrong valid blocks %d or segno %u",
+			 GET_SIT_VBLOCKS(raw_sit), segno);
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		return -EINVAL;
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 09df641..67aaed9 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -136,7 +136,10 @@
 	Opt_alloc,
 	Opt_fsync,
 	Opt_test_dummy_encryption,
-	Opt_checkpoint,
+	Opt_checkpoint_disable,
+	Opt_checkpoint_disable_cap,
+	Opt_checkpoint_disable_cap_perc,
+	Opt_checkpoint_enable,
 	Opt_err,
 };
 
@@ -195,45 +198,52 @@
 	{Opt_alloc, "alloc_mode=%s"},
 	{Opt_fsync, "fsync_mode=%s"},
 	{Opt_test_dummy_encryption, "test_dummy_encryption"},
-	{Opt_checkpoint, "checkpoint=%s"},
+	{Opt_checkpoint_disable, "checkpoint=disable"},
+	{Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
+	{Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
+	{Opt_checkpoint_enable, "checkpoint=enable"},
 	{Opt_err, NULL},
 };
 
-void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
+void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 {
 	struct va_format vaf;
 	va_list args;
+	int level;
 
 	va_start(args, fmt);
-	vaf.fmt = fmt;
+
+	level = printk_get_level(fmt);
+	vaf.fmt = printk_skip_level(fmt);
 	vaf.va = &args;
-	printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
+	printk("%c%cF2FS-fs (%s): %pV\n",
+	       KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
+
 	va_end(args);
 }
 
 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 {
-	block_t limit = (sbi->user_block_count << 1) / 1000;
+	block_t limit = min((sbi->user_block_count << 1) / 1000,
+			sbi->user_block_count - sbi->reserved_blocks);
 
 	/* limit is 0.2% */
 	if (test_opt(sbi, RESERVE_ROOT) &&
 			F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 		F2FS_OPTION(sbi).root_reserved_blocks = limit;
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"Reduce reserved blocks for root = %u",
-			F2FS_OPTION(sbi).root_reserved_blocks);
+		f2fs_info(sbi, "Reduce reserved blocks for root = %u",
+			  F2FS_OPTION(sbi).root_reserved_blocks);
 	}
 	if (!test_opt(sbi, RESERVE_ROOT) &&
 		(!uid_eq(F2FS_OPTION(sbi).s_resuid,
 				make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 		!gid_eq(F2FS_OPTION(sbi).s_resgid,
 				make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
-				from_kuid_munged(&init_user_ns,
-					F2FS_OPTION(sbi).s_resuid),
-				from_kgid_munged(&init_user_ns,
-					F2FS_OPTION(sbi).s_resgid));
+		f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
+			  from_kuid_munged(&init_user_ns,
+					   F2FS_OPTION(sbi).s_resuid),
+			  from_kgid_munged(&init_user_ns,
+					   F2FS_OPTION(sbi).s_resgid));
 }
 
 static void init_once(void *foo)
@@ -254,35 +264,29 @@
 	int ret = -EINVAL;
 
 	if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
-		f2fs_msg(sb, KERN_ERR,
-			"Cannot change journaled "
-			"quota options when quota turned on");
+		f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 		return -EINVAL;
 	}
 	if (f2fs_sb_has_quota_ino(sbi)) {
-		f2fs_msg(sb, KERN_INFO,
-			"QUOTA feature is enabled, so ignore qf_name");
+		f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 		return 0;
 	}
 
 	qname = match_strdup(args);
 	if (!qname) {
-		f2fs_msg(sb, KERN_ERR,
-			"Not enough memory for storing quotafile name");
+		f2fs_err(sbi, "Not enough memory for storing quotafile name");
 		return -ENOMEM;
 	}
 	if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 		if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 			ret = 0;
 		else
-			f2fs_msg(sb, KERN_ERR,
-				 "%s quota file already specified",
+			f2fs_err(sbi, "%s quota file already specified",
 				 QTYPE2NAME(qtype));
 		goto errout;
 	}
 	if (strchr(qname, '/')) {
-		f2fs_msg(sb, KERN_ERR,
-			"quotafile must be on filesystem root");
+		f2fs_err(sbi, "quotafile must be on filesystem root");
 		goto errout;
 	}
 	F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
@@ -298,8 +302,7 @@
 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
 
 	if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
-		f2fs_msg(sb, KERN_ERR, "Cannot change journaled quota options"
-			" when quota turned on");
+		f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 		return -EINVAL;
 	}
 	kvfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
@@ -315,8 +318,7 @@
 	 * to support legacy quotas in quota files.
 	 */
 	if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
-		f2fs_msg(sbi->sb, KERN_ERR, "Project quota feature not enabled. "
-			 "Cannot enable project quota enforcement.");
+		f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 		return -1;
 	}
 	if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
@@ -336,21 +338,18 @@
 
 		if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 				test_opt(sbi, PRJQUOTA)) {
-			f2fs_msg(sbi->sb, KERN_ERR, "old and new quota "
-					"format mixing");
+			f2fs_err(sbi, "old and new quota format mixing");
 			return -1;
 		}
 
 		if (!F2FS_OPTION(sbi).s_jquota_fmt) {
-			f2fs_msg(sbi->sb, KERN_ERR, "journaled quota format "
-					"not specified");
+			f2fs_err(sbi, "journaled quota format not specified");
 			return -1;
 		}
 	}
 
 	if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"QUOTA feature is enabled, so ignore jquota_fmt");
+		f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 		F2FS_OPTION(sbi).s_jquota_fmt = 0;
 	}
 	return 0;
@@ -418,8 +417,7 @@
 			break;
 		case Opt_nodiscard:
 			if (f2fs_sb_has_blkzoned(sbi)) {
-				f2fs_msg(sb, KERN_WARNING,
-					"discard is required for zoned block devices");
+				f2fs_warn(sbi, "discard is required for zoned block devices");
 				return -EINVAL;
 			}
 			clear_opt(sbi, DISCARD);
@@ -451,20 +449,16 @@
 			break;
 #else
 		case Opt_user_xattr:
-			f2fs_msg(sb, KERN_INFO,
-				"user_xattr options not supported");
+			f2fs_info(sbi, "user_xattr options not supported");
 			break;
 		case Opt_nouser_xattr:
-			f2fs_msg(sb, KERN_INFO,
-				"nouser_xattr options not supported");
+			f2fs_info(sbi, "nouser_xattr options not supported");
 			break;
 		case Opt_inline_xattr:
-			f2fs_msg(sb, KERN_INFO,
-				"inline_xattr options not supported");
+			f2fs_info(sbi, "inline_xattr options not supported");
 			break;
 		case Opt_noinline_xattr:
-			f2fs_msg(sb, KERN_INFO,
-				"noinline_xattr options not supported");
+			f2fs_info(sbi, "noinline_xattr options not supported");
 			break;
 #endif
 #ifdef CONFIG_F2FS_FS_POSIX_ACL
@@ -476,10 +470,10 @@
 			break;
 #else
 		case Opt_acl:
-			f2fs_msg(sb, KERN_INFO, "acl options not supported");
+			f2fs_info(sbi, "acl options not supported");
 			break;
 		case Opt_noacl:
-			f2fs_msg(sb, KERN_INFO, "noacl options not supported");
+			f2fs_info(sbi, "noacl options not supported");
 			break;
 #endif
 		case Opt_active_logs:
@@ -529,9 +523,8 @@
 			if (args->from && match_int(args, &arg))
 				return -EINVAL;
 			if (test_opt(sbi, RESERVE_ROOT)) {
-				f2fs_msg(sb, KERN_INFO,
-					"Preserve previous reserve_root=%u",
-					F2FS_OPTION(sbi).root_reserved_blocks);
+				f2fs_info(sbi, "Preserve previous reserve_root=%u",
+					  F2FS_OPTION(sbi).root_reserved_blocks);
 			} else {
 				F2FS_OPTION(sbi).root_reserved_blocks = arg;
 				set_opt(sbi, RESERVE_ROOT);
@@ -542,8 +535,7 @@
 				return -EINVAL;
 			uid = make_kuid(current_user_ns(), arg);
 			if (!uid_valid(uid)) {
-				f2fs_msg(sb, KERN_ERR,
-					"Invalid uid value %d", arg);
+				f2fs_err(sbi, "Invalid uid value %d", arg);
 				return -EINVAL;
 			}
 			F2FS_OPTION(sbi).s_resuid = uid;
@@ -553,8 +545,7 @@
 				return -EINVAL;
 			gid = make_kgid(current_user_ns(), arg);
 			if (!gid_valid(gid)) {
-				f2fs_msg(sb, KERN_ERR,
-					"Invalid gid value %d", arg);
+				f2fs_err(sbi, "Invalid gid value %d", arg);
 				return -EINVAL;
 			}
 			F2FS_OPTION(sbi).s_resgid = gid;
@@ -567,9 +558,7 @@
 			if (strlen(name) == 8 &&
 					!strncmp(name, "adaptive", 8)) {
 				if (f2fs_sb_has_blkzoned(sbi)) {
-					f2fs_msg(sb, KERN_WARNING,
-						 "adaptive mode is not allowed with "
-						 "zoned block device feature");
+					f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 					kvfree(name);
 					return -EINVAL;
 				}
@@ -587,9 +576,8 @@
 			if (args->from && match_int(args, &arg))
 				return -EINVAL;
 			if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
-				f2fs_msg(sb, KERN_WARNING,
-					"Not support %d, larger than %d",
-					1 << arg, BIO_MAX_PAGES);
+				f2fs_warn(sbi, "Not support %d, larger than %d",
+					  1 << arg, BIO_MAX_PAGES);
 				return -EINVAL;
 			}
 			F2FS_OPTION(sbi).write_io_size_bits = arg;
@@ -610,13 +598,11 @@
 			break;
 #else
 		case Opt_fault_injection:
-			f2fs_msg(sb, KERN_INFO,
-				"fault_injection options not supported");
+			f2fs_info(sbi, "fault_injection options not supported");
 			break;
 
 		case Opt_fault_type:
-			f2fs_msg(sb, KERN_INFO,
-				"fault_type options not supported");
+			f2fs_info(sbi, "fault_type options not supported");
 			break;
 #endif
 		case Opt_lazytime:
@@ -696,8 +682,7 @@
 		case Opt_jqfmt_vfsv0:
 		case Opt_jqfmt_vfsv1:
 		case Opt_noquota:
-			f2fs_msg(sb, KERN_INFO,
-					"quota operations not supported");
+			f2fs_info(sbi, "quota operations not supported");
 			break;
 #endif
 		case Opt_whint:
@@ -759,39 +744,44 @@
 		case Opt_test_dummy_encryption:
 #ifdef CONFIG_FS_ENCRYPTION
 			if (!f2fs_sb_has_encrypt(sbi)) {
-				f2fs_msg(sb, KERN_ERR, "Encrypt feature is off");
+				f2fs_err(sbi, "Encrypt feature is off");
 				return -EINVAL;
 			}
 
 			F2FS_OPTION(sbi).test_dummy_encryption = true;
-			f2fs_msg(sb, KERN_INFO,
-					"Test dummy encryption mode enabled");
+			f2fs_info(sbi, "Test dummy encryption mode enabled");
 #else
-			f2fs_msg(sb, KERN_INFO,
-					"Test dummy encryption mount option ignored");
+			f2fs_info(sbi, "Test dummy encryption mount option ignored");
 #endif
 			break;
-		case Opt_checkpoint:
-			name = match_strdup(&args[0]);
-			if (!name)
-				return -ENOMEM;
-
-			if (strlen(name) == 6 &&
-					!strncmp(name, "enable", 6)) {
-				clear_opt(sbi, DISABLE_CHECKPOINT);
-			} else if (strlen(name) == 7 &&
-					!strncmp(name, "disable", 7)) {
-				set_opt(sbi, DISABLE_CHECKPOINT);
-			} else {
-				kvfree(name);
+		case Opt_checkpoint_disable_cap_perc:
+			if (args->from && match_int(args, &arg))
 				return -EINVAL;
-			}
-			kvfree(name);
+			if (arg < 0 || arg > 100)
+				return -EINVAL;
+			if (arg == 100)
+				F2FS_OPTION(sbi).unusable_cap =
+					sbi->user_block_count;
+			else
+				F2FS_OPTION(sbi).unusable_cap =
+					(sbi->user_block_count / 100) *	arg;
+			set_opt(sbi, DISABLE_CHECKPOINT);
+			break;
+		case Opt_checkpoint_disable_cap:
+			if (args->from && match_int(args, &arg))
+				return -EINVAL;
+			F2FS_OPTION(sbi).unusable_cap = arg;
+			set_opt(sbi, DISABLE_CHECKPOINT);
+			break;
+		case Opt_checkpoint_disable:
+			set_opt(sbi, DISABLE_CHECKPOINT);
+			break;
+		case Opt_checkpoint_enable:
+			clear_opt(sbi, DISABLE_CHECKPOINT);
 			break;
 		default:
-			f2fs_msg(sb, KERN_ERR,
-				"Unrecognized mount option \"%s\" or missing value",
-				p);
+			f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
+				 p);
 			return -EINVAL;
 		}
 	}
@@ -800,23 +790,18 @@
 		return -EINVAL;
 #else
 	if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
-		f2fs_msg(sbi->sb, KERN_INFO,
-			 "Filesystem with quota feature cannot be mounted RDWR "
-			 "without CONFIG_QUOTA");
+		f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 		return -EINVAL;
 	}
 	if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
-		f2fs_msg(sb, KERN_ERR,
-			"Filesystem with project quota feature cannot be "
-			"mounted RDWR without CONFIG_QUOTA");
+		f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 		return -EINVAL;
 	}
 #endif
 
 	if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
-		f2fs_msg(sb, KERN_ERR,
-				"Should set mode=lfs with %uKB-sized IO",
-				F2FS_IO_SIZE_KB(sbi));
+		f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
+			 F2FS_IO_SIZE_KB(sbi));
 		return -EINVAL;
 	}
 
@@ -825,15 +810,11 @@
 
 		if (!f2fs_sb_has_extra_attr(sbi) ||
 			!f2fs_sb_has_flexible_inline_xattr(sbi)) {
-			f2fs_msg(sb, KERN_ERR,
-					"extra_attr or flexible_inline_xattr "
-					"feature is off");
+			f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
 			return -EINVAL;
 		}
 		if (!test_opt(sbi, INLINE_XATTR)) {
-			f2fs_msg(sb, KERN_ERR,
-					"inline_xattr_size option should be "
-					"set with inline_xattr option");
+			f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
 			return -EINVAL;
 		}
 
@@ -842,16 +823,14 @@
 
 		if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
 				F2FS_OPTION(sbi).inline_xattr_size > max_size) {
-			f2fs_msg(sb, KERN_ERR,
-				"inline xattr size is out of range: %d ~ %d",
-				min_size, max_size);
+			f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
+				 min_size, max_size);
 			return -EINVAL;
 		}
 	}
 
 	if (test_opt(sbi, DISABLE_CHECKPOINT) && test_opt(sbi, LFS)) {
-		f2fs_msg(sb, KERN_ERR,
-				"LFS not compatible with checkpoint=disable\n");
+		f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
 		return -EINVAL;
 	}
 
@@ -1003,6 +982,9 @@
 static void f2fs_i_callback(struct rcu_head *head)
 {
 	struct inode *inode = container_of(head, struct inode, i_rcu);
+
+	fscrypt_free_inode(inode);
+
 	kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
 }
 
@@ -1318,6 +1300,8 @@
 		seq_puts(seq, ",disable_roll_forward");
 	if (test_opt(sbi, DISCARD))
 		seq_puts(seq, ",discard");
+	else
+		seq_puts(seq, ",nodiscard");
 	if (test_opt(sbi, NOHEAP))
 		seq_puts(seq, ",no_heap");
 	else
@@ -1414,8 +1398,8 @@
 		seq_printf(seq, ",alloc_mode=%s", "reuse");
 
 	if (test_opt(sbi, DISABLE_CHECKPOINT))
-		seq_puts(seq, ",checkpoint=disable");
-
+		seq_printf(seq, ",checkpoint=disable:%u",
+				F2FS_OPTION(sbi).unusable_cap);
 	if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
 		seq_printf(seq, ",fsync_mode=%s", "posix");
 	else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
@@ -1445,6 +1429,7 @@
 	set_opt(sbi, NOHEAP);
 	sbi->sb->s_flags |= MS_LAZYTIME;
 	clear_opt(sbi, DISABLE_CHECKPOINT);
+	F2FS_OPTION(sbi).unusable_cap = 0;
 	set_opt(sbi, FLUSH_MERGE);
 	set_opt(sbi, DISCARD);
 	if (f2fs_sb_has_blkzoned(sbi))
@@ -1472,10 +1457,10 @@
 	struct cp_control cpc;
 	int err = 0;
 	int ret;
+	block_t unusable;
 
 	if (s_flags & MS_RDONLY) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-				"checkpoint=disable on readonly fs");
+		f2fs_err(sbi, "checkpoint=disable on readonly fs");
 		return -EINVAL;
 	}
 	sbi->sb->s_flags |= MS_ACTIVE;
@@ -1499,7 +1484,8 @@
 		goto restore_flag;
 	}
 
-	if (f2fs_disable_cp_again(sbi)) {
+	unusable = f2fs_get_unusable_blocks(sbi);
+	if (f2fs_disable_cp_again(sbi, unusable)) {
 		err = -EAGAIN;
 		goto restore_flag;
 	}
@@ -1512,7 +1498,7 @@
 		goto out_unlock;
 
 	spin_lock(&sbi->stat_lock);
-	sbi->unusable_block_count = 0;
+	sbi->unusable_block_count = unusable;
 	spin_unlock(&sbi->stat_lock);
 
 out_unlock:
@@ -1577,8 +1563,8 @@
 	/* recover superblocks we couldn't write due to previous RO mount */
 	if (!(*flags & MS_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
 		err = f2fs_commit_super(sbi, false);
-		f2fs_msg(sb, KERN_INFO,
-			"Try to recover all the superblocks, ret: %d", err);
+		f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
+			  err);
 		if (!err)
 			clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
 	}
@@ -1619,15 +1605,13 @@
 	/* disallow enable/disable extent_cache dynamically */
 	if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
 		err = -EINVAL;
-		f2fs_msg(sbi->sb, KERN_WARNING,
-				"switch extent_cache option is not allowed");
+		f2fs_warn(sbi, "switch extent_cache option is not allowed");
 		goto restore_opts;
 	}
 
 	if ((*flags & MS_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
 		err = -EINVAL;
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"disabling checkpoint not compatible with read-only");
+		f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
 		goto restore_opts;
 	}
 
@@ -1697,8 +1681,7 @@
 restore_gc:
 	if (need_restart_gc) {
 		if (f2fs_start_gc_thread(sbi))
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"background gc thread has stopped");
+			f2fs_warn(sbi, "background gc thread has stopped");
 	} else if (need_stop_gc) {
 		f2fs_stop_gc_thread(sbi);
 	}
@@ -1837,8 +1820,7 @@
 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
 {
 	if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"quota sysfile may be corrupted, skip loading it");
+		f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
 		return 0;
 	}
 
@@ -1854,8 +1836,7 @@
 	if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
 		err = f2fs_enable_quotas(sbi->sb);
 		if (err) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-					"Cannot turn on quota_ino: %d", err);
+			f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
 			return 0;
 		}
 		return 1;
@@ -1868,8 +1849,8 @@
 				enabled = 1;
 				continue;
 			}
-			f2fs_msg(sbi->sb, KERN_ERR,
-				"Cannot turn on quotas: %d on %d", err, i);
+			f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
+				 err, i);
 		}
 	}
 	return enabled;
@@ -1890,8 +1871,7 @@
 
 	qf_inode = f2fs_iget(sb, qf_inum);
 	if (IS_ERR(qf_inode)) {
-		f2fs_msg(sb, KERN_ERR,
-			"Bad quota inode %u:%lu", type, qf_inum);
+		f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
 		return PTR_ERR(qf_inode);
 	}
 
@@ -1904,17 +1884,17 @@
 
 static int f2fs_enable_quotas(struct super_block *sb)
 {
+	struct f2fs_sb_info *sbi = F2FS_SB(sb);
 	int type, err = 0;
 	unsigned long qf_inum;
 	bool quota_mopt[MAXQUOTAS] = {
-		test_opt(F2FS_SB(sb), USRQUOTA),
-		test_opt(F2FS_SB(sb), GRPQUOTA),
-		test_opt(F2FS_SB(sb), PRJQUOTA),
+		test_opt(sbi, USRQUOTA),
+		test_opt(sbi, GRPQUOTA),
+		test_opt(sbi, PRJQUOTA),
 	};
 
 	if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
-		f2fs_msg(sb, KERN_ERR,
-			"quota file may be corrupted, skip loading it");
+		f2fs_err(sbi, "quota file may be corrupted, skip loading it");
 		return 0;
 	}
 
@@ -1927,10 +1907,8 @@
 				DQUOT_USAGE_ENABLED |
 				(quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
 			if (err) {
-				f2fs_msg(sb, KERN_ERR,
-					"Failed to enable quota tracking "
-					"(type=%d, err=%d). Please run "
-					"fsck to fix.", type, err);
+				f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
+					 type, err);
 				for (type--; type >= 0; type--)
 					dquot_quota_off(sb, type);
 				set_sbi_flag(F2FS_SB(sb),
@@ -1949,6 +1927,18 @@
 	int cnt;
 	int ret;
 
+	/*
+	 * do_quotactl
+	 *  f2fs_quota_sync
+	 *  down_read(quota_sem)
+	 *  dquot_writeback_dquots()
+	 *  f2fs_dquot_commit
+	 *                            block_operation
+	 *                            down_read(quota_sem)
+	 */
+	f2fs_lock_op(sbi);
+
+	down_read(&sbi->quota_sem);
 	ret = dquot_writeback_dquots(sb, type);
 	if (ret)
 		goto out;
@@ -1986,6 +1976,8 @@
 out:
 	if (ret)
 		set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
+	up_read(&sbi->quota_sem);
+	f2fs_unlock_op(sbi);
 	return ret;
 }
 
@@ -2050,10 +2042,8 @@
 		if (err) {
 			int ret = dquot_quota_off(sb, type);
 
-			f2fs_msg(sb, KERN_ERR,
-				"Fail to turn off disk quota "
-				"(type: %d, err: %d, ret:%d), Please "
-				"run fsck to fix it.", type, err, ret);
+			f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
+				 type, err, ret);
 			set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
 		}
 	}
@@ -2079,32 +2069,40 @@
 
 static int f2fs_dquot_commit(struct dquot *dquot)
 {
+	struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
 	int ret;
 
+	down_read(&sbi->quota_sem);
 	ret = dquot_commit(dquot);
 	if (ret < 0)
-		set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
+		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
+	up_read(&sbi->quota_sem);
 	return ret;
 }
 
 static int f2fs_dquot_acquire(struct dquot *dquot)
 {
+	struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
 	int ret;
 
+	down_read(&sbi->quota_sem);
 	ret = dquot_acquire(dquot);
 	if (ret < 0)
-		set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
-
+		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
+	up_read(&sbi->quota_sem);
 	return ret;
 }
 
 static int f2fs_dquot_release(struct dquot *dquot)
 {
+	struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
 	int ret;
 
+	down_read(&sbi->quota_sem);
 	ret = dquot_release(dquot);
 	if (ret < 0)
-		set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
+		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
+	up_read(&sbi->quota_sem);
 	return ret;
 }
 
@@ -2114,22 +2112,27 @@
 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
 	int ret;
 
+	down_read(&sbi->quota_sem);
 	ret = dquot_mark_dquot_dirty(dquot);
 
 	/* if we are using journalled quota */
 	if (is_journalled_quota(sbi))
 		set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
 
+	up_read(&sbi->quota_sem);
 	return ret;
 }
 
 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
 {
+	struct f2fs_sb_info *sbi = F2FS_SB(sb);
 	int ret;
 
+	down_read(&sbi->quota_sem);
 	ret = dquot_commit_info(sb, type);
 	if (ret < 0)
-		set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
+		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
+	up_read(&sbi->quota_sem);
 	return ret;
 }
 
@@ -2346,55 +2349,49 @@
 				(segment_count << log_blocks_per_seg);
 
 	if (segment0_blkaddr != cp_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Mismatch start address, segment0(%u) cp_blkaddr(%u)",
-			segment0_blkaddr, cp_blkaddr);
+		f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
+			  segment0_blkaddr, cp_blkaddr);
 		return true;
 	}
 
 	if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
 							sit_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong CP boundary, start(%u) end(%u) blocks(%u)",
-			cp_blkaddr, sit_blkaddr,
-			segment_count_ckpt << log_blocks_per_seg);
+		f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
+			  cp_blkaddr, sit_blkaddr,
+			  segment_count_ckpt << log_blocks_per_seg);
 		return true;
 	}
 
 	if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
 							nat_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
-			sit_blkaddr, nat_blkaddr,
-			segment_count_sit << log_blocks_per_seg);
+		f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
+			  sit_blkaddr, nat_blkaddr,
+			  segment_count_sit << log_blocks_per_seg);
 		return true;
 	}
 
 	if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
 							ssa_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
-			nat_blkaddr, ssa_blkaddr,
-			segment_count_nat << log_blocks_per_seg);
+		f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
+			  nat_blkaddr, ssa_blkaddr,
+			  segment_count_nat << log_blocks_per_seg);
 		return true;
 	}
 
 	if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
 							main_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
-			ssa_blkaddr, main_blkaddr,
-			segment_count_ssa << log_blocks_per_seg);
+		f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
+			  ssa_blkaddr, main_blkaddr,
+			  segment_count_ssa << log_blocks_per_seg);
 		return true;
 	}
 
 	if (main_end_blkaddr > seg_end_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
-			main_blkaddr,
-			segment0_blkaddr +
-				(segment_count << log_blocks_per_seg),
-			segment_count_main << log_blocks_per_seg);
+		f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
+			  main_blkaddr,
+			  segment0_blkaddr +
+			  (segment_count << log_blocks_per_seg),
+			  segment_count_main << log_blocks_per_seg);
 		return true;
 	} else if (main_end_blkaddr < seg_end_blkaddr) {
 		int err = 0;
@@ -2411,12 +2408,11 @@
 			err = __f2fs_commit_super(bh, NULL);
 			res = err ? "failed" : "done";
 		}
-		f2fs_msg(sb, KERN_INFO,
-			"Fix alignment : %s, start(%u) end(%u) block(%u)",
-			res, main_blkaddr,
-			segment0_blkaddr +
-				(segment_count << log_blocks_per_seg),
-			segment_count_main << log_blocks_per_seg);
+		f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%u) block(%u)",
+			  res, main_blkaddr,
+			  segment0_blkaddr +
+			  (segment_count << log_blocks_per_seg),
+			  segment_count_main << log_blocks_per_seg);
 		if (err)
 			return true;
 	}
@@ -2430,59 +2426,52 @@
 	block_t total_sections, blocks_per_seg;
 	struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
 					(bh->b_data + F2FS_SUPER_OFFSET);
-	struct super_block *sb = sbi->sb;
 	unsigned int blocksize;
 	size_t crc_offset = 0;
 	__u32 crc = 0;
 
+	if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
+		f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
+			  F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
+		return -EINVAL;
+	}
+
 	/* Check checksum_offset and crc in superblock */
 	if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
 		crc_offset = le32_to_cpu(raw_super->checksum_offset);
 		if (crc_offset !=
 			offsetof(struct f2fs_super_block, crc)) {
-			f2fs_msg(sb, KERN_INFO,
-				"Invalid SB checksum offset: %zu",
-				crc_offset);
-			return 1;
+			f2fs_info(sbi, "Invalid SB checksum offset: %zu",
+				  crc_offset);
+			return -EFSCORRUPTED;
 		}
 		crc = le32_to_cpu(raw_super->crc);
 		if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
-			f2fs_msg(sb, KERN_INFO,
-				"Invalid SB checksum value: %u", crc);
-			return 1;
+			f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
+			return -EFSCORRUPTED;
 		}
 	}
 
-	if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
-		f2fs_msg(sb, KERN_INFO,
-			"Magic Mismatch, valid(0x%x) - read(0x%x)",
-			F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
-		return 1;
-	}
-
 	/* Currently, support only 4KB page cache size */
 	if (F2FS_BLKSIZE != PAGE_SIZE) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid page_cache_size (%lu), supports only 4KB",
-			PAGE_SIZE);
-		return 1;
+		f2fs_info(sbi, "Invalid page_cache_size (%lu), supports only 4KB",
+			  PAGE_SIZE);
+		return -EFSCORRUPTED;
 	}
 
 	/* Currently, support only 4KB block size */
 	blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
 	if (blocksize != F2FS_BLKSIZE) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid blocksize (%u), supports only 4KB",
-			blocksize);
-		return 1;
+		f2fs_info(sbi, "Invalid blocksize (%u), supports only 4KB",
+			  blocksize);
+		return -EFSCORRUPTED;
 	}
 
 	/* check log blocks per segment */
 	if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid log blocks per segment (%u)",
-			le32_to_cpu(raw_super->log_blocks_per_seg));
-		return 1;
+		f2fs_info(sbi, "Invalid log blocks per segment (%u)",
+			  le32_to_cpu(raw_super->log_blocks_per_seg));
+		return -EFSCORRUPTED;
 	}
 
 	/* Currently, support 512/1024/2048/4096 bytes sector size */
@@ -2490,18 +2479,17 @@
 				F2FS_MAX_LOG_SECTOR_SIZE ||
 		le32_to_cpu(raw_super->log_sectorsize) <
 				F2FS_MIN_LOG_SECTOR_SIZE) {
-		f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
-			le32_to_cpu(raw_super->log_sectorsize));
-		return 1;
+		f2fs_info(sbi, "Invalid log sectorsize (%u)",
+			  le32_to_cpu(raw_super->log_sectorsize));
+		return -EFSCORRUPTED;
 	}
 	if (le32_to_cpu(raw_super->log_sectors_per_block) +
 		le32_to_cpu(raw_super->log_sectorsize) !=
 			F2FS_MAX_LOG_SECTOR_SIZE) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid log sectors per block(%u) log sectorsize(%u)",
-			le32_to_cpu(raw_super->log_sectors_per_block),
-			le32_to_cpu(raw_super->log_sectorsize));
-		return 1;
+		f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
+			  le32_to_cpu(raw_super->log_sectors_per_block),
+			  le32_to_cpu(raw_super->log_sectorsize));
+		return -EFSCORRUPTED;
 	}
 
 	segment_count = le32_to_cpu(raw_super->segment_count);
@@ -2514,77 +2502,68 @@
 
 	if (segment_count > F2FS_MAX_SEGMENT ||
 				segment_count < F2FS_MIN_SEGMENTS) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid segment count (%u)",
-			segment_count);
-		return 1;
+		f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
+		return -EFSCORRUPTED;
 	}
 
 	if (total_sections > segment_count ||
 			total_sections < F2FS_MIN_SEGMENTS ||
 			segs_per_sec > segment_count || !segs_per_sec) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid segment/section count (%u, %u x %u)",
-			segment_count, total_sections, segs_per_sec);
-		return 1;
+		f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
+			  segment_count, total_sections, segs_per_sec);
+		return -EFSCORRUPTED;
 	}
 
 	if ((segment_count / segs_per_sec) < total_sections) {
-		f2fs_msg(sb, KERN_INFO,
-			"Small segment_count (%u < %u * %u)",
-			segment_count, segs_per_sec, total_sections);
-		return 1;
+		f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
+			  segment_count, segs_per_sec, total_sections);
+		return -EFSCORRUPTED;
 	}
 
 	if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong segment_count / block_count (%u > %llu)",
-			segment_count, le64_to_cpu(raw_super->block_count));
-		return 1;
+		f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
+			  segment_count, le64_to_cpu(raw_super->block_count));
+		return -EFSCORRUPTED;
 	}
 
 	if (secs_per_zone > total_sections || !secs_per_zone) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong secs_per_zone / total_sections (%u, %u)",
-			secs_per_zone, total_sections);
-		return 1;
+		f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
+			  secs_per_zone, total_sections);
+		return -EFSCORRUPTED;
 	}
 	if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
 			raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
 			(le32_to_cpu(raw_super->extension_count) +
 			raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
-		f2fs_msg(sb, KERN_INFO,
-			"Corrupted extension count (%u + %u > %u)",
-			le32_to_cpu(raw_super->extension_count),
-			raw_super->hot_ext_count,
-			F2FS_MAX_EXTENSION);
-		return 1;
+		f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
+			  le32_to_cpu(raw_super->extension_count),
+			  raw_super->hot_ext_count,
+			  F2FS_MAX_EXTENSION);
+		return -EFSCORRUPTED;
 	}
 
 	if (le32_to_cpu(raw_super->cp_payload) >
 				(blocks_per_seg - F2FS_CP_PACKS)) {
-		f2fs_msg(sb, KERN_INFO,
-			"Insane cp_payload (%u > %u)",
-			le32_to_cpu(raw_super->cp_payload),
-			blocks_per_seg - F2FS_CP_PACKS);
-		return 1;
+		f2fs_info(sbi, "Insane cp_payload (%u > %u)",
+			  le32_to_cpu(raw_super->cp_payload),
+			  blocks_per_seg - F2FS_CP_PACKS);
+		return -EFSCORRUPTED;
 	}
 
 	/* check reserved ino info */
 	if (le32_to_cpu(raw_super->node_ino) != 1 ||
 		le32_to_cpu(raw_super->meta_ino) != 2 ||
 		le32_to_cpu(raw_super->root_ino) != 3) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
-			le32_to_cpu(raw_super->node_ino),
-			le32_to_cpu(raw_super->meta_ino),
-			le32_to_cpu(raw_super->root_ino));
-		return 1;
+		f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
+			  le32_to_cpu(raw_super->node_ino),
+			  le32_to_cpu(raw_super->meta_ino),
+			  le32_to_cpu(raw_super->root_ino));
+		return -EFSCORRUPTED;
 	}
 
 	/* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
 	if (sanity_check_area_boundary(sbi, bh))
-		return 1;
+		return -EFSCORRUPTED;
 
 	return 0;
 }
@@ -2622,8 +2601,7 @@
 
 	if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
 			ovp_segments == 0 || reserved_segments == 0)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong layout: check mkfs.f2fs version");
+		f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
 		return 1;
 	}
 
@@ -2632,16 +2610,15 @@
 	log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
 	if (!user_block_count || user_block_count >=
 			segment_count_main << log_blocks_per_seg) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong user_block_count: %u", user_block_count);
+		f2fs_err(sbi, "Wrong user_block_count: %u",
+			 user_block_count);
 		return 1;
 	}
 
 	valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
 	if (valid_user_blocks > user_block_count) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong valid_user_blocks: %u, user_block_count: %u",
-			valid_user_blocks, user_block_count);
+		f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
+			 valid_user_blocks, user_block_count);
 		return 1;
 	}
 
@@ -2649,9 +2626,8 @@
 	avail_node_count = sbi->total_node_count - sbi->nquota_files -
 						F2FS_RESERVED_NODE_NUM;
 	if (valid_node_count > avail_node_count) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong valid_node_count: %u, avail_node_count: %u",
-			valid_node_count, avail_node_count);
+		f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
+			 valid_node_count, avail_node_count);
 		return 1;
 	}
 
@@ -2665,10 +2641,9 @@
 		for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
 			if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
 				le32_to_cpu(ckpt->cur_node_segno[j])) {
-				f2fs_msg(sbi->sb, KERN_ERR,
-					"Node segment (%u, %u) has the same "
-					"segno: %u", i, j,
-					le32_to_cpu(ckpt->cur_node_segno[i]));
+				f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
+					 i, j,
+					 le32_to_cpu(ckpt->cur_node_segno[i]));
 				return 1;
 			}
 		}
@@ -2680,10 +2655,9 @@
 		for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
 			if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
 				le32_to_cpu(ckpt->cur_data_segno[j])) {
-				f2fs_msg(sbi->sb, KERN_ERR,
-					"Data segment (%u, %u) has the same "
-					"segno: %u", i, j,
-					le32_to_cpu(ckpt->cur_data_segno[i]));
+				f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
+					 i, j,
+					 le32_to_cpu(ckpt->cur_data_segno[i]));
 				return 1;
 			}
 		}
@@ -2692,10 +2666,9 @@
 		for (j = i; j < NR_CURSEG_DATA_TYPE; j++) {
 			if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
 				le32_to_cpu(ckpt->cur_data_segno[j])) {
-				f2fs_msg(sbi->sb, KERN_ERR,
-					"Data segment (%u) and Data segment (%u)"
-					" has the same segno: %u", i, j,
-					le32_to_cpu(ckpt->cur_node_segno[i]));
+				f2fs_err(sbi, "Data segment (%u) and Data segment (%u) has the same segno: %u",
+					 i, j,
+					 le32_to_cpu(ckpt->cur_node_segno[i]));
 				return 1;
 			}
 		}
@@ -2706,9 +2679,8 @@
 
 	if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
 		nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong bitmap size: sit: %u, nat:%u",
-			sit_bitmap_size, nat_bitmap_size);
+		f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
+			 sit_bitmap_size, nat_bitmap_size);
 		return 1;
 	}
 
@@ -2717,14 +2689,22 @@
 	if (cp_pack_start_sum < cp_payload + 1 ||
 		cp_pack_start_sum > blocks_per_seg - 1 -
 			NR_CURSEG_TYPE) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong cp_pack_start_sum: %u",
-			cp_pack_start_sum);
+		f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
+			 cp_pack_start_sum);
+		return 1;
+	}
+
+	if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
+		le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
+		f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
+			  "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
+			  "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
+			  le32_to_cpu(ckpt->checksum_offset));
 		return 1;
 	}
 
 	if (unlikely(f2fs_cp_error(sbi))) {
-		f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
+		f2fs_err(sbi, "A bug case: need to run fsck");
 		return 1;
 	}
 	return 0;
@@ -2893,18 +2873,17 @@
 	for (block = 0; block < 2; block++) {
 		bh = sb_bread(sb, block);
 		if (!bh) {
-			f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
-				block + 1);
+			f2fs_err(sbi, "Unable to read %dth superblock",
+				 block + 1);
 			err = -EIO;
 			continue;
 		}
 
 		/* sanity checking of raw super */
-		if (sanity_check_raw_super(sbi, bh)) {
-			f2fs_msg(sb, KERN_ERR,
-				"Can't find valid F2FS filesystem in %dth superblock",
-				block + 1);
-			err = -EINVAL;
+		err = sanity_check_raw_super(sbi, bh);
+		if (err) {
+			f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
+				 block + 1);
 			brelse(bh);
 			continue;
 		}
@@ -3037,36 +3016,32 @@
 #ifdef CONFIG_BLK_DEV_ZONED
 		if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
 				!f2fs_sb_has_blkzoned(sbi)) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-				"Zoned block device feature not enabled\n");
+			f2fs_err(sbi, "Zoned block device feature not enabled\n");
 			return -EINVAL;
 		}
 		if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
 			if (init_blkz_info(sbi, i)) {
-				f2fs_msg(sbi->sb, KERN_ERR,
-					"Failed to initialize F2FS blkzone information");
+				f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
 				return -EINVAL;
 			}
 			if (max_devices == 1)
 				break;
-			f2fs_msg(sbi->sb, KERN_INFO,
-				"Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
-				i, FDEV(i).path,
-				FDEV(i).total_segments,
-				FDEV(i).start_blk, FDEV(i).end_blk,
-				bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
-				"Host-aware" : "Host-managed");
+			f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
+				  i, FDEV(i).path,
+				  FDEV(i).total_segments,
+				  FDEV(i).start_blk, FDEV(i).end_blk,
+				  bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
+				  "Host-aware" : "Host-managed");
 			continue;
 		}
 #endif
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"Mount Device [%2d]: %20s, %8u, %8x - %8x",
-				i, FDEV(i).path,
-				FDEV(i).total_segments,
-				FDEV(i).start_blk, FDEV(i).end_blk);
+		f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
+			  i, FDEV(i).path,
+			  FDEV(i).total_segments,
+			  FDEV(i).start_blk, FDEV(i).end_blk);
 	}
-	f2fs_msg(sbi->sb, KERN_INFO,
-			"IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
+	f2fs_info(sbi,
+		  "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
 	return 0;
 }
 
@@ -3112,7 +3087,7 @@
 	/* Load the checksum driver */
 	sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
 	if (IS_ERR(sbi->s_chksum_driver)) {
-		f2fs_msg(sb, KERN_ERR, "Cannot load crc32 driver.");
+		f2fs_err(sbi, "Cannot load crc32 driver.");
 		err = PTR_ERR(sbi->s_chksum_driver);
 		sbi->s_chksum_driver = NULL;
 		goto free_sbi;
@@ -3120,7 +3095,7 @@
 
 	/* set a block size */
 	if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
-		f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
+		f2fs_err(sbi, "unable to set blocksize");
 		goto free_sbi;
 	}
 
@@ -3144,8 +3119,7 @@
 	 */
 #ifndef CONFIG_BLK_DEV_ZONED
 	if (f2fs_sb_has_blkzoned(sbi)) {
-		f2fs_msg(sb, KERN_ERR,
-			 "Zoned block device support is not enabled");
+		f2fs_err(sbi, "Zoned block device support is not enabled");
 		err = -EOPNOTSUPP;
 		goto free_sb_buf;
 	}
@@ -3198,6 +3172,7 @@
 	mutex_init(&sbi->gc_mutex);
 	mutex_init(&sbi->writepages);
 	mutex_init(&sbi->cp_mutex);
+	mutex_init(&sbi->resize_mutex);
 	init_rwsem(&sbi->node_write);
 	init_rwsem(&sbi->node_change);
 
@@ -3233,6 +3208,7 @@
 	}
 
 	init_rwsem(&sbi->cp_rwsem);
+	init_rwsem(&sbi->quota_sem);
 	init_waitqueue_head(&sbi->cp_wait);
 	init_sb_info(sbi);
 
@@ -3252,14 +3228,14 @@
 	/* get an inode for meta space */
 	sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
 	if (IS_ERR(sbi->meta_inode)) {
-		f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
+		f2fs_err(sbi, "Failed to read F2FS meta data inode");
 		err = PTR_ERR(sbi->meta_inode);
 		goto free_io_dummy;
 	}
 
 	err = f2fs_get_valid_checkpoint(sbi);
 	if (err) {
-		f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
+		f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
 		goto free_meta_inode;
 	}
 
@@ -3270,10 +3246,13 @@
 		sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
 	}
 
+	if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+
 	/* Initialize device list */
 	err = f2fs_scan_devices(sbi);
 	if (err) {
-		f2fs_msg(sb, KERN_ERR, "Failed to find devices");
+		f2fs_err(sbi, "Failed to find devices");
 		goto free_devices;
 	}
 
@@ -3293,6 +3272,7 @@
 		INIT_LIST_HEAD(&sbi->inode_list[i]);
 		spin_lock_init(&sbi->inode_lock[i]);
 	}
+	mutex_init(&sbi->flush_lock);
 
 	f2fs_init_extent_cache_info(sbi);
 
@@ -3303,14 +3283,14 @@
 	/* setup f2fs internal modules */
 	err = f2fs_build_segment_manager(sbi);
 	if (err) {
-		f2fs_msg(sb, KERN_ERR,
-			"Failed to initialize F2FS segment manager");
+		f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
+			 err);
 		goto free_sm;
 	}
 	err = f2fs_build_node_manager(sbi);
 	if (err) {
-		f2fs_msg(sb, KERN_ERR,
-			"Failed to initialize F2FS node manager");
+		f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
+			 err);
 		goto free_nm;
 	}
 
@@ -3334,7 +3314,7 @@
 	/* get an inode for node space */
 	sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
 	if (IS_ERR(sbi->node_inode)) {
-		f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
+		f2fs_err(sbi, "Failed to read node inode");
 		err = PTR_ERR(sbi->node_inode);
 		goto free_stats;
 	}
@@ -3342,7 +3322,7 @@
 	/* read root inode and dentry */
 	root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
 	if (IS_ERR(root)) {
-		f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
+		f2fs_err(sbi, "Failed to read root inode");
 		err = PTR_ERR(root);
 		goto free_node_inode;
 	}
@@ -3368,8 +3348,7 @@
 	if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
 		err = f2fs_enable_quotas(sb);
 		if (err)
-			f2fs_msg(sb, KERN_ERR,
-				"Cannot turn on quotas: error %d", err);
+			f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
 	}
 #endif
 	/* if there are nt orphan nodes free them */
@@ -3389,13 +3368,10 @@
 		if (f2fs_hw_is_readonly(sbi)) {
 			if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
 				err = -EROFS;
-				f2fs_msg(sb, KERN_ERR,
-					"Need to recover fsync data, but "
-					"write access unavailable");
+				f2fs_err(sbi, "Need to recover fsync data, but write access unavailable");
 				goto free_meta;
 			}
-			f2fs_msg(sbi->sb, KERN_INFO, "write access "
-				"unavailable, skipping recovery");
+			f2fs_info(sbi, "write access unavailable, skipping recovery");
 			goto reset_checkpoint;
 		}
 
@@ -3410,8 +3386,8 @@
 			if (err != -ENOMEM)
 				skip_recovery = true;
 			need_fsck = true;
-			f2fs_msg(sb, KERN_ERR,
-				"Cannot recover all fsync data errno=%d", err);
+			f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
+				 err);
 			goto free_meta;
 		}
 	} else {
@@ -3419,8 +3395,7 @@
 
 		if (!f2fs_readonly(sb) && err > 0) {
 			err = -EINVAL;
-			f2fs_msg(sb, KERN_ERR,
-				"Need to recover fsync data");
+			f2fs_err(sbi, "Need to recover fsync data");
 			goto free_meta;
 		}
 	}
@@ -3451,17 +3426,16 @@
 	/* recover broken superblock */
 	if (recovery) {
 		err = f2fs_commit_super(sbi, true);
-		f2fs_msg(sb, KERN_INFO,
-			"Try to recover %dth superblock, ret: %d",
-			sbi->valid_super_block ? 1 : 2, err);
+		f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
+			  sbi->valid_super_block ? 1 : 2, err);
 	}
 
 	f2fs_join_shrinker(sbi);
 
 	f2fs_tuning_parameters(sbi);
 
-	f2fs_msg(sbi->sb, KERN_NOTICE, "Mounted with checkpoint version = %llx",
-				cur_cp_version(F2FS_CKPT(sbi)));
+	f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
+		    cur_cp_version(F2FS_CKPT(sbi)));
 	f2fs_update_time(sbi, CP_TIME);
 	f2fs_update_time(sbi, REQ_TIME);
 	clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 676e3cf..29b2f37 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -68,6 +68,20 @@
 		(unsigned long long)(dirty_segments(sbi)));
 }
 
+static ssize_t unusable_show(struct f2fs_attr *a,
+		struct f2fs_sb_info *sbi, char *buf)
+{
+	block_t unusable;
+
+	if (test_opt(sbi, DISABLE_CHECKPOINT))
+		unusable = sbi->unusable_block_count;
+	else
+		unusable = f2fs_get_unusable_blocks(sbi);
+	return snprintf(buf, PAGE_SIZE, "%llu\n",
+		(unsigned long long)unusable);
+}
+
+
 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
@@ -440,6 +454,7 @@
 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 F2FS_GENERAL_RO_ATTR(features);
 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
+F2FS_GENERAL_RO_ATTR(unusable);
 
 #ifdef CONFIG_FS_ENCRYPTION
 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
@@ -495,6 +510,7 @@
 	ATTR_LIST(inject_type),
 #endif
 	ATTR_LIST(dirty_segments),
+	ATTR_LIST(unusable),
 	ATTR_LIST(lifetime_write_kbytes),
 	ATTR_LIST(features),
 	ATTR_LIST(reserved_blocks),
@@ -566,8 +582,7 @@
 
 		if ((i % 10) == 0)
 			seq_printf(seq, "%-10d", i);
-		seq_printf(seq, "%d|%-3u", se->type,
-					get_valid_blocks(sbi, i, false));
+		seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
 		if ((i % 10) == 9 || i == (total_segs - 1))
 			seq_putc(seq, '\n');
 		else
@@ -593,8 +608,7 @@
 		struct seg_entry *se = get_seg_entry(sbi, i);
 
 		seq_printf(seq, "%-10d", i);
-		seq_printf(seq, "%d|%-3u|", se->type,
-					get_valid_blocks(sbi, i, false));
+		seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
 		for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
 			seq_printf(seq, " %.2x", se->cur_valid_map[j]);
 		seq_putc(seq, '\n');
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index e791741..b32c456 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -346,7 +346,10 @@
 
 	*xe = __find_xattr(cur_addr, last_txattr_addr, index, len, name);
 	if (!*xe) {
-		err = -EFAULT;
+		f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
+								inode->i_ino);
+		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
+		err = -EFSCORRUPTED;
 		goto out;
 	}
 check:
@@ -622,7 +625,10 @@
 	/* find entry with wanted name. */
 	here = __find_xattr(base_addr, last_base_addr, index, len, name);
 	if (!here) {
-		error = -EFAULT;
+		f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
+								inode->i_ino);
+		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
+		error = -EFSCORRUPTED;
 		goto exit;
 	}
 
diff --git a/fs/inode.c b/fs/inode.c
index e64f5e7..bbd4531 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -2134,3 +2134,27 @@
 	return timespec_trunc(now, inode->i_sb->s_time_gran);
 }
 EXPORT_SYMBOL(current_time);
+
+/*
+ * Generic function to check FS_IOC_SETFLAGS values and reject any invalid
+ * configurations.
+ *
+ * Note: the caller should be holding i_mutex, or else be sure that they have
+ * exclusive access to the inode structure.
+ */
+int vfs_ioc_setflags_prepare(struct inode *inode, unsigned int oldflags,
+			     unsigned int flags)
+{
+	/*
+	 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
+	 * the relevant capability.
+	 *
+	 * This test looks nicer. Thanks to Pauline Middelink
+	 */
+	if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL) &&
+	    !capable(CAP_LINUX_IMMUTABLE))
+		return -EPERM;
+
+	return 0;
+}
+EXPORT_SYMBOL(vfs_ioc_setflags_prepare);
diff --git a/fs/namei.c b/fs/namei.c
index 88eb41c..b55b424 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1085,7 +1085,7 @@
 		return ERR_PTR(error);
 
 	nd->last_type = LAST_BIND;
-	res = inode->i_link;
+	res = READ_ONCE(inode->i_link);
 	if (!res) {
 		const char * (*get)(struct dentry *, struct inode *,
 				struct delayed_call *);
@@ -4782,9 +4782,11 @@
 {
 	DEFINE_DELAYED_CALL(done);
 	struct inode *inode = d_inode(dentry);
-	const char *link = inode->i_link;
+	const char *link;
 	int res;
 
+	link = READ_ONCE(inode->i_link);
+
 	if (!link) {
 		link = inode->i_op->get_link(dentry, inode, &done);
 		if (IS_ERR(link))
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 014d7f9..07e984f 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -208,7 +208,7 @@
 
 #define DCACHE_MAY_FREE			0x00800000
 #define DCACHE_FALLTHRU			0x01000000 /* Fall through to lower layer */
-#define DCACHE_ENCRYPTED_WITH_KEY	0x02000000 /* dir is encrypted with a valid key */
+#define DCACHE_ENCRYPTED_NAME		0x02000000 /* Encrypted name (dir key was unavailable) */
 #define DCACHE_OP_REAL			0x04000000
 
 #define DCACHE_PAR_LOOKUP		0x10000000 /* being looked up (with parent locked shared) */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8c2aba2..889641c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3284,4 +3284,7 @@
 extern bool path_noexec(const struct path *path);
 extern void inode_nohighmem(struct inode *inode);
 
+int vfs_ioc_setflags_prepare(struct inode *inode, unsigned int oldflags,
+			     unsigned int flags);
+
 #endif /* _LINUX_FS_H */
diff --git a/include/linux/fscrypt.h b/include/linux/fscrypt.h
index c8a6ca5..3ac4f7d 100644
--- a/include/linux/fscrypt.h
+++ b/include/linux/fscrypt.h
@@ -32,6 +32,7 @@
 	u32 hash;
 	u32 minor_hash;
 	struct fscrypt_str crypto_buf;
+	bool is_ciphertext_name;
 };
 
 #define FSTR_INIT(n, l)		{ .name = n, .len = l }
@@ -75,7 +76,8 @@
 
 static inline bool fscrypt_has_encryption_key(const struct inode *inode)
 {
-	return (inode->i_crypt_info != NULL);
+	/* pairs with cmpxchg_release() in fscrypt_get_encryption_info() */
+	return READ_ONCE(inode->i_crypt_info) != NULL;
 }
 
 static inline bool fscrypt_dummy_context_enabled(struct inode *inode)
@@ -84,9 +86,21 @@
 		inode->i_sb->s_cop->dummy_context(inode);
 }
 
+/*
+ * When d_splice_alias() moves a directory's encrypted alias to its decrypted
+ * alias as a result of the encryption key being added, DCACHE_ENCRYPTED_NAME
+ * must be cleared.  Note that we don't have to support arbitrary moves of this
+ * flag because fscrypt doesn't allow encrypted aliases to be the source or
+ * target of a rename().
+ */
+static inline void fscrypt_handle_d_move(struct dentry *dentry)
+{
+	dentry->d_flags &= ~DCACHE_ENCRYPTED_NAME;
+}
+
 /* crypto.c */
 extern void fscrypt_enqueue_decrypt_work(struct work_struct *);
-extern struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *, gfp_t);
+extern struct fscrypt_ctx *fscrypt_get_ctx(gfp_t);
 extern void fscrypt_release_ctx(struct fscrypt_ctx *);
 extern struct page *fscrypt_encrypt_page(const struct inode *, struct page *,
 						unsigned int, unsigned int,
@@ -110,6 +124,7 @@
 /* keyinfo.c */
 extern int fscrypt_get_encryption_info(struct inode *);
 extern void fscrypt_put_encryption_info(struct inode *);
+extern void fscrypt_free_inode(struct inode *);
 
 /* fname.c */
 extern int fscrypt_setup_filename(struct inode *, const struct qstr *,
@@ -210,13 +225,15 @@
 
 /* hooks.c */
 extern int fscrypt_file_open(struct inode *inode, struct file *filp);
-extern int __fscrypt_prepare_link(struct inode *inode, struct inode *dir);
+extern int __fscrypt_prepare_link(struct inode *inode, struct inode *dir,
+				  struct dentry *dentry);
 extern int __fscrypt_prepare_rename(struct inode *old_dir,
 				    struct dentry *old_dentry,
 				    struct inode *new_dir,
 				    struct dentry *new_dentry,
 				    unsigned int flags);
-extern int __fscrypt_prepare_lookup(struct inode *dir, struct dentry *dentry);
+extern int __fscrypt_prepare_lookup(struct inode *dir, struct dentry *dentry,
+				    struct fscrypt_name *fname);
 extern int __fscrypt_prepare_symlink(struct inode *dir, unsigned int len,
 				     unsigned int max_len,
 				     struct fscrypt_str *disk_link);
@@ -238,13 +255,16 @@
 	return false;
 }
 
+static inline void fscrypt_handle_d_move(struct dentry *dentry)
+{
+}
+
 /* crypto.c */
 static inline void fscrypt_enqueue_decrypt_work(struct work_struct *work)
 {
 }
 
-static inline struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *inode,
-						  gfp_t gfp_flags)
+static inline struct fscrypt_ctx *fscrypt_get_ctx(gfp_t gfp_flags)
 {
 	return ERR_PTR(-EOPNOTSUPP);
 }
@@ -318,6 +338,10 @@
 	return;
 }
 
+static inline void fscrypt_free_inode(struct inode *inode)
+{
+}
+
  /* fname.c */
 static inline int fscrypt_setup_filename(struct inode *dir,
 					 const struct qstr *iname,
@@ -326,7 +350,7 @@
 	if (IS_ENCRYPTED(dir))
 		return -EOPNOTSUPP;
 
-	memset(fname, 0, sizeof(struct fscrypt_name));
+	memset(fname, 0, sizeof(*fname));
 	fname->usr_fname = iname;
 	fname->disk_name.name = (unsigned char *)iname->name;
 	fname->disk_name.len = iname->len;
@@ -397,8 +421,8 @@
 	return 0;
 }
 
-static inline int __fscrypt_prepare_link(struct inode *inode,
-					 struct inode *dir)
+static inline int __fscrypt_prepare_link(struct inode *inode, struct inode *dir,
+					 struct dentry *dentry)
 {
 	return -EOPNOTSUPP;
 }
@@ -413,7 +437,8 @@
 }
 
 static inline int __fscrypt_prepare_lookup(struct inode *dir,
-					   struct dentry *dentry)
+					   struct dentry *dentry,
+					   struct fscrypt_name *fname)
 {
 	return -EOPNOTSUPP;
 }
@@ -493,7 +518,7 @@
 				       struct dentry *dentry)
 {
 	if (IS_ENCRYPTED(dir))
-		return __fscrypt_prepare_link(d_inode(old_dentry), dir);
+		return __fscrypt_prepare_link(d_inode(old_dentry), dir, dentry);
 	return 0;
 }
 
@@ -534,27 +559,32 @@
  * fscrypt_prepare_lookup - prepare to lookup a name in a possibly-encrypted directory
  * @dir: directory being searched
  * @dentry: filename being looked up
- * @flags: lookup flags
+ * @fname: (output) the name to use to search the on-disk directory
  *
- * Prepare for ->lookup() in a directory which may be encrypted.  Lookups can be
- * done with or without the directory's encryption key; without the key,
+ * Prepare for ->lookup() in a directory which may be encrypted by determining
+ * the name that will actually be used to search the directory on-disk.  Lookups
+ * can be done with or without the directory's encryption key; without the key,
  * filenames are presented in encrypted form.  Therefore, we'll try to set up
  * the directory's encryption key, but even without it the lookup can continue.
  *
- * To allow invalidating stale dentries if the directory's encryption key is
- * added later, we also install a custom ->d_revalidate() method and use the
- * DCACHE_ENCRYPTED_WITH_KEY flag to indicate whether a given dentry is a
- * plaintext name (flag set) or a ciphertext name (flag cleared).
+ * This also installs a custom ->d_revalidate() method which will invalidate the
+ * dentry if it was created without the key and the key is later added.
  *
- * Return: 0 on success, -errno if a problem occurred while setting up the
- * encryption key
+ * Return: 0 on success; -ENOENT if key is unavailable but the filename isn't a
+ * correctly formed encoded ciphertext name, so a negative dentry should be
+ * created; or another -errno code.
  */
 static inline int fscrypt_prepare_lookup(struct inode *dir,
 					 struct dentry *dentry,
-					 unsigned int flags)
+					 struct fscrypt_name *fname)
 {
 	if (IS_ENCRYPTED(dir))
-		return __fscrypt_prepare_lookup(dir, dentry);
+		return __fscrypt_prepare_lookup(dir, dentry, fname);
+
+	memset(fname, 0, sizeof(*fname));
+	fname->usr_fname = &dentry->d_name;
+	fname->disk_name.name = (unsigned char *)dentry->d_name.name;
+	fname->disk_name.len = dentry->d_name.len;
 	return 0;
 }
 
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index cea051b..4eb46c1 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -1021,8 +1021,8 @@
 	),
 
 	TP_fast_assign(
-		__entry->dev		= page->mapping->host->i_sb->s_dev;
-		__entry->ino		= page->mapping->host->i_ino;
+		__entry->dev		= page_file_mapping(page)->host->i_sb->s_dev;
+		__entry->ino		= page_file_mapping(page)->host->i_ino;
 		__entry->index		= page->index;
 		__entry->old_blkaddr	= fio->old_blkaddr;
 		__entry->new_blkaddr	= fio->new_blkaddr;
@@ -1209,10 +1209,11 @@
 	),
 
 	TP_fast_assign(
-		__entry->dev	= page->mapping->host->i_sb->s_dev;
-		__entry->ino	= page->mapping->host->i_ino;
+		__entry->dev	= page_file_mapping(page)->host->i_sb->s_dev;
+		__entry->ino	= page_file_mapping(page)->host->i_ino;
 		__entry->type	= type;
-		__entry->dir	= S_ISDIR(page->mapping->host->i_mode);
+		__entry->dir	=
+			S_ISDIR(page_file_mapping(page)->host->i_mode);
 		__entry->index	= page->index;
 		__entry->dirty	= PageDirty(page);
 		__entry->uptodate = PageUptodate(page);