Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull misc filesystem and quota fixes from Jan Kara:
 "Some smaller udf, ext2, quota & reiserfs fixes"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  ext2: Unmap metadata when zeroing blocks
  udf: don't bother with full-page write optimisations in adinicb case
  reiserfs: Unlock superblock before calling reiserfs_quota_on_mount()
  udf: Remove useless check in udf_adinicb_write_begin()
  quota: fill in Q_XGETQSTAT inode information for inactive quotas
  ext2: Check return value from ext2_get_group_desc()

fs/ext2/ialloc.c

@@ -465,6 +465,11 @@ struct inode *ext2_new_inode(struct inode *dir, umode_t mode,
 
 	for (i = 0; i < sbi->s_groups_count; i++) {
 		gdp = ext2_get_group_desc(sb, group, &bh2);
+		if (!gdp) {
+			if (++group == sbi->s_groups_count)
+				group = 0;
+			continue;
+		}
 		brelse(bitmap_bh);
 		bitmap_bh = read_inode_bitmap(sb, group);
 		if (!bitmap_bh) {

fs/ext2/inode.c

@@ -733,6 +733,16 @@ static int ext2_get_blocks(struct inode *inode,
 	}
 
 	if (IS_DAX(inode)) {
+		int i;
+
+		/*
+		 * We must unmap blocks before zeroing so that writeback cannot
+		 * overwrite zeros with stale data from block device page cache.
+		 */
+		for (i = 0; i < count; i++) {
+			unmap_underlying_metadata(inode->i_sb->s_bdev,
+					le32_to_cpu(chain[depth-1].key) + i);
+		}
 		/*
 		 * block must be initialised before we put it in the tree
 		 * so that it's not found by another thread before it's

fs/quota/quota.c

@@ -341,6 +341,7 @@ static int quota_getstate(struct super_block *sb, struct fs_quota_stat *fqs)
 	struct qc_state state;
 	int ret;
 
+	memset(&state, 0, sizeof (struct qc_state));
 	ret = sb->s_qcop->get_state(sb, &state);
 	if (ret < 0)
 		return ret;
@@ -365,17 +366,19 @@ static int quota_getstate(struct super_block *sb, struct fs_quota_stat *fqs)
 	fqs->qs_rtbtimelimit = state.s_state[type].rt_spc_timelimit;
 	fqs->qs_bwarnlimit = state.s_state[type].spc_warnlimit;
 	fqs->qs_iwarnlimit = state.s_state[type].ino_warnlimit;
-	if (state.s_state[USRQUOTA].flags & QCI_ACCT_ENABLED) {
+
+	/* Inodes may be allocated even if inactive; copy out if present */
+	if (state.s_state[USRQUOTA].ino) {
 		fqs->qs_uquota.qfs_ino = state.s_state[USRQUOTA].ino;
 		fqs->qs_uquota.qfs_nblks = state.s_state[USRQUOTA].blocks;
 		fqs->qs_uquota.qfs_nextents = state.s_state[USRQUOTA].nextents;
 	}
-	if (state.s_state[GRPQUOTA].flags & QCI_ACCT_ENABLED) {
+	if (state.s_state[GRPQUOTA].ino) {
 		fqs->qs_gquota.qfs_ino = state.s_state[GRPQUOTA].ino;
 		fqs->qs_gquota.qfs_nblks = state.s_state[GRPQUOTA].blocks;
 		fqs->qs_gquota.qfs_nextents = state.s_state[GRPQUOTA].nextents;
 	}
-	if (state.s_state[PRJQUOTA].flags & QCI_ACCT_ENABLED) {
+	if (state.s_state[PRJQUOTA].ino) {
 		/*
 		 * Q_XGETQSTAT doesn't have room for both group and project
 		 * quotas.  So, allow the project quota values to be copied out
@@ -411,6 +414,7 @@ static int quota_getstatev(struct super_block *sb, struct fs_quota_statv *fqs)
 	struct qc_state state;
 	int ret;
 
+	memset(&state, 0, sizeof (struct qc_state));
 	ret = sb->s_qcop->get_state(sb, &state);
 	if (ret < 0)
 		return ret;
@@ -435,17 +439,19 @@ static int quota_getstatev(struct super_block *sb, struct fs_quota_statv *fqs)
 	fqs->qs_rtbtimelimit = state.s_state[type].rt_spc_timelimit;
 	fqs->qs_bwarnlimit = state.s_state[type].spc_warnlimit;
 	fqs->qs_iwarnlimit = state.s_state[type].ino_warnlimit;
-	if (state.s_state[USRQUOTA].flags & QCI_ACCT_ENABLED) {
+
+	/* Inodes may be allocated even if inactive; copy out if present */
+	if (state.s_state[USRQUOTA].ino) {
 		fqs->qs_uquota.qfs_ino = state.s_state[USRQUOTA].ino;
 		fqs->qs_uquota.qfs_nblks = state.s_state[USRQUOTA].blocks;
 		fqs->qs_uquota.qfs_nextents = state.s_state[USRQUOTA].nextents;
 	}
-	if (state.s_state[GRPQUOTA].flags & QCI_ACCT_ENABLED) {
+	if (state.s_state[GRPQUOTA].ino) {
 		fqs->qs_gquota.qfs_ino = state.s_state[GRPQUOTA].ino;
 		fqs->qs_gquota.qfs_nblks = state.s_state[GRPQUOTA].blocks;
 		fqs->qs_gquota.qfs_nextents = state.s_state[GRPQUOTA].nextents;
 	}
-	if (state.s_state[PRJQUOTA].flags & QCI_ACCT_ENABLED) {
+	if (state.s_state[PRJQUOTA].ino) {
 		fqs->qs_pquota.qfs_ino = state.s_state[PRJQUOTA].ino;
 		fqs->qs_pquota.qfs_nblks = state.s_state[PRJQUOTA].blocks;
 		fqs->qs_pquota.qfs_nextents = state.s_state[PRJQUOTA].nextents;

fs/reiserfs/super.c

@@ -190,7 +190,15 @@ static int remove_save_link_only(struct super_block *s,
 static int reiserfs_quota_on_mount(struct super_block *, int);
 #endif
 
-/* look for uncompleted unlinks and truncates and complete them */
+/*
+ * Look for uncompleted unlinks and truncates and complete them
+ *
+ * Called with superblock write locked.  If quotas are enabled, we have to
+ * release/retake lest we call dquot_quota_on_mount(), proceed to
+ * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per
+ * cpu worklets to complete flush_async_commits() that in turn wait for the
+ * superblock write lock.
+ */
 static int finish_unfinished(struct super_block *s)
 {
 	INITIALIZE_PATH(path);
@@ -237,7 +245,9 @@ static int finish_unfinished(struct super_block *s)
 				quota_enabled[i] = 0;
 				continue;
 			}
+			reiserfs_write_unlock(s);
 			ret = reiserfs_quota_on_mount(s, i);
+			reiserfs_write_lock(s);
 			if (ret < 0)
 				reiserfs_warning(s, "reiserfs-2500",
 						 "cannot turn on journaled "

fs/udf/file.c

@@ -94,7 +94,7 @@ static int udf_adinicb_write_begin(struct file *file,
 		return -ENOMEM;
 	*pagep = page;
 
-	if (!PageUptodate(page) && len != PAGE_SIZE)
+	if (!PageUptodate(page))
 		__udf_adinicb_readpage(page);
 	return 0;
 }
@@ -105,11 +105,25 @@ static ssize_t udf_adinicb_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 	return 0;
 }
 
+static int udf_adinicb_write_end(struct file *file, struct address_space *mapping,
+				 loff_t pos, unsigned len, unsigned copied,
+				 struct page *page, void *fsdata)
+{
+	struct inode *inode = page->mapping->host;
+	loff_t last_pos = pos + copied;
+	if (last_pos > inode->i_size)
+		i_size_write(inode, last_pos);
+	set_page_dirty(page);
+	unlock_page(page);
+	put_page(page);
+	return copied;
+}
+
 const struct address_space_operations udf_adinicb_aops = {
 	.readpage	= udf_adinicb_readpage,
 	.writepage	= udf_adinicb_writepage,
 	.write_begin	= udf_adinicb_write_begin,
-	.write_end	= simple_write_end,
+	.write_end	= udf_adinicb_write_end,
 	.direct_IO	= udf_adinicb_direct_IO,
 };