Merge tag 'fs_for_v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull ext2 and udf fixes from Jan Kara:
 "A couple of fixes for udf and ext2. Namely:

   - fix making ext2 mountable (again) with 64k blocksize

   - fix for ext2 statx(2) handling

   - fix for udf handling of corrupted filesystem so that it doesn't get
     corrupted even further

   - couple smaller ext2 and udf cleanups"

* tag 'fs_for_v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: Drop pointless check from udf_sync_fs()
  ext2: support statx syscall
  udf: disallow RW mount without valid integrity descriptor
  udf: finalize integrity descriptor before writeback
  udf: factor out LVID finalization for reuse
  ext2: Fix underflow in ext2_max_size()
  ext2: Fix a typo in comment
  ext2: Remove redundant check for finding no group
  ext2: Annotate implicit fall through in __ext2_truncate_blocks
  ext2: Set superblock revision when enabling xattr feature
  ext2: Remove redundant check on s_inode_size
  ext2: set proper return code

9 files changed, 97 insertions, 37 deletions

diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 93fcfe7bbb3b..10ab238de9a6 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -758,6 +758,7 @@ extern int ext2_write_inode (struct inode *, struct writeback_control *);
 extern void ext2_evict_inode(struct inode *);
 extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int);
 extern int ext2_setattr (struct dentry *, struct iattr *);
+extern int ext2_getattr (const struct path *, struct kstat *, u32, unsigned int);
 extern void ext2_set_inode_flags(struct inode *inode);
 extern int ext2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		       u64 start, u64 len);
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 28b2609f25c1..39c4772e96c9 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -199,6 +199,7 @@ const struct inode_operations ext2_file_inode_operations = {
 #ifdef CONFIG_EXT2_FS_XATTR
 	.listxattr	= ext2_listxattr,
 #endif
+	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 	.get_acl	= ext2_get_acl,
 	.set_acl	= ext2_set_acl,
diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c
index 5c3d7b7e4975..a0c5ea91fcd4 100644
--- a/fs/ext2/ialloc.c
+++ b/fs/ext2/ialloc.c
@@ -222,8 +222,6 @@ static int find_group_dir(struct super_block *sb, struct inode *parent)
 			best_desc = desc;
 		}
 	}
-	if (!best_desc)
-		return -1;
 
 	return best_group;
 }
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index e4bb9386c045..c27c27300d95 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -717,7 +717,7 @@ static int ext2_get_blocks(struct inode *inode,
 	/* the number of blocks need to allocate for [d,t]indirect blocks */
 	indirect_blks = (chain + depth) - partial - 1;
 	/*
-	 * Next look up the indirect map to count the totoal number of
+	 * Next look up the indirect map to count the total number of
 	 * direct blocks to allocate for this branch.
 	 */
 	count = ext2_blks_to_allocate(partial, indirect_blks,
@@ -1239,6 +1239,7 @@ do_indirects:
 				mark_inode_dirty(inode);
 				ext2_free_branches(inode, &nr, &nr+1, 1);
 			}
+			/* fall through */
 		case EXT2_IND_BLOCK:
 			nr = i_data[EXT2_DIND_BLOCK];
 			if (nr) {
@@ -1246,6 +1247,7 @@ do_indirects:
 				mark_inode_dirty(inode);
 				ext2_free_branches(inode, &nr, &nr+1, 2);
 			}
+			/* fall through */
 		case EXT2_DIND_BLOCK:
 			nr = i_data[EXT2_TIND_BLOCK];
 			if (nr) {
@@ -1635,6 +1637,32 @@ int ext2_write_inode(struct inode *inode, struct writeback_control *wbc)
 	return __ext2_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
 }
 
+int ext2_getattr(const struct path *path, struct kstat *stat,
+		u32 request_mask, unsigned int query_falgs)
+{
+	struct inode *inode = d_inode(path->dentry);
+	struct ext2_inode_info *ei = EXT2_I(inode);
+	unsigned int flags;
+
+	flags = ei->i_flags & EXT2_FL_USER_VISIBLE;
+	if (flags & EXT2_APPEND_FL)
+		stat->attributes |= STATX_ATTR_APPEND;
+	if (flags & EXT2_COMPR_FL)
+		stat->attributes |= STATX_ATTR_COMPRESSED;
+	if (flags & EXT2_IMMUTABLE_FL)
+		stat->attributes |= STATX_ATTR_IMMUTABLE;
+	if (flags & EXT2_NODUMP_FL)
+		stat->attributes |= STATX_ATTR_NODUMP;
+	stat->attributes_mask |= (STATX_ATTR_APPEND |
+			STATX_ATTR_COMPRESSED |
+			STATX_ATTR_ENCRYPTED |
+			STATX_ATTR_IMMUTABLE |
+			STATX_ATTR_NODUMP);
+
+	generic_fillattr(inode, stat);
+	return 0;
+}
+
 int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
 {
 	struct inode *inode = d_inode(dentry);
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index 0c26dcc5d850..ccfbbf59e2fc 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -416,6 +416,7 @@ const struct inode_operations ext2_dir_inode_operations = {
 #ifdef CONFIG_EXT2_FS_XATTR
 	.listxattr	= ext2_listxattr,
 #endif
+	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 	.get_acl	= ext2_get_acl,
 	.set_acl	= ext2_set_acl,
@@ -426,6 +427,7 @@ const struct inode_operations ext2_special_inode_operations = {
 #ifdef CONFIG_EXT2_FS_XATTR
 	.listxattr	= ext2_listxattr,
 #endif
+	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 	.get_acl	= ext2_get_acl,
 	.set_acl	= ext2_set_acl,
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 73b2d528237f..0128010a0874 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -757,7 +757,8 @@ static loff_t ext2_max_size(int bits)
 {
 	loff_t res = EXT2_NDIR_BLOCKS;
 	int meta_blocks;
-	loff_t upper_limit;
+	unsigned int upper_limit;
+	unsigned int ppb = 1 << (bits-2);
 
 	/* This is calculated to be the largest file size for a
 	 * dense, file such that the total number of
@@ -771,24 +772,34 @@ static loff_t ext2_max_size(int bits)
 	/* total blocks in file system block size */
 	upper_limit >>= (bits - 9);
 
+	/* Compute how many blocks we can address by block tree */
+	res += 1LL << (bits-2);
+	res += 1LL << (2*(bits-2));
+	res += 1LL << (3*(bits-2));
+	/* Does block tree limit file size? */
+	if (res < upper_limit)
+		goto check_lfs;
 
+	res = upper_limit;
+	/* How many metadata blocks are needed for addressing upper_limit? */
+	upper_limit -= EXT2_NDIR_BLOCKS;
 	/* indirect blocks */
 	meta_blocks = 1;
+	upper_limit -= ppb;
 	/* double indirect blocks */
-	meta_blocks += 1 + (1LL << (bits-2));
-	/* tripple indirect blocks */
-	meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
-
-	upper_limit -= meta_blocks;
-	upper_limit <<= bits;
-
-	res += 1LL << (bits-2);
-	res += 1LL << (2*(bits-2));
-	res += 1LL << (3*(bits-2));
+	if (upper_limit < ppb * ppb) {
+		meta_blocks += 1 + DIV_ROUND_UP(upper_limit, ppb);
+		res -= meta_blocks;
+		goto check_lfs;
+	}
+	meta_blocks += 1 + ppb;
+	upper_limit -= ppb * ppb;
+	/* tripple indirect blocks for the rest */
+	meta_blocks += 1 + DIV_ROUND_UP(upper_limit, ppb) +
+		DIV_ROUND_UP(upper_limit, ppb*ppb);
+	res -= meta_blocks;
+check_lfs:
 	res <<= bits;
-	if (res > upper_limit)
-		res = upper_limit;
-
 	if (res > MAX_LFS_FILESIZE)
 		res = MAX_LFS_FILESIZE;
 
@@ -1024,8 +1035,6 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 	sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
 	sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
 
-	if (EXT2_INODE_SIZE(sb) == 0)
-		goto cantfind_ext2;
 	sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb);
 	if (sbi->s_inodes_per_block == 0 || sbi->s_inodes_per_group == 0)
 		goto cantfind_ext2;
@@ -1087,12 +1096,14 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 					   sizeof(struct buffer_head *),
 					   GFP_KERNEL);
 	if (sbi->s_group_desc == NULL) {
+		ret = -ENOMEM;
 		ext2_msg(sb, KERN_ERR, "error: not enough memory");
 		goto failed_mount;
 	}
 	bgl_lock_init(sbi->s_blockgroup_lock);
 	sbi->s_debts = kcalloc(sbi->s_groups_count, sizeof(*sbi->s_debts), GFP_KERNEL);
 	if (!sbi->s_debts) {
+		ret = -ENOMEM;
 		ext2_msg(sb, KERN_ERR, "error: not enough memory");
 		goto failed_mount_group_desc;
 	}
@@ -1148,6 +1159,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 #ifdef CONFIG_EXT2_FS_XATTR
 	sbi->s_ea_block_cache = ext2_xattr_create_cache();
 	if (!sbi->s_ea_block_cache) {
+		ret = -ENOMEM;
 		ext2_msg(sb, KERN_ERR, "Failed to create ea_block_cache");
 		goto failed_mount3;
 	}
diff --git a/fs/ext2/symlink.c b/fs/ext2/symlink.c
index d5589ddcc281..00cdb8679486 100644
--- a/fs/ext2/symlink.c
+++ b/fs/ext2/symlink.c
@@ -23,6 +23,7 @@
 
 const struct inode_operations ext2_symlink_inode_operations = {
 	.get_link	= page_get_link,
+	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 #ifdef CONFIG_EXT2_FS_XATTR
 	.listxattr	= ext2_listxattr,
@@ -31,6 +32,7 @@ const struct inode_operations ext2_symlink_inode_operations = {
  
 const struct inode_operations ext2_fast_symlink_inode_operations = {
 	.get_link	= simple_get_link,
+	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 #ifdef CONFIG_EXT2_FS_XATTR
 	.listxattr	= ext2_listxattr,
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index 4f30876ee325..1e33e0ac8cf1 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -342,6 +342,7 @@ static void ext2_xattr_update_super_block(struct super_block *sb)
 		return;
 
 	spin_lock(&EXT2_SB(sb)->s_lock);
+	ext2_update_dynamic_rev(sb);
 	EXT2_SET_COMPAT_FEATURE(sb, EXT2_FEATURE_COMPAT_EXT_ATTR);
 	spin_unlock(&EXT2_SB(sb)->s_lock);
 	mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
diff --git a/fs/udf/super.c b/fs/udf/super.c
index e3d684ea3203..ffd8038ff728 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1474,6 +1474,17 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
 	if (lvd->integritySeqExt.extLength)
 		udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
 	ret = 0;
+
+	if (!sbi->s_lvid_bh) {
+		/* We can't generate unique IDs without a valid LVID */
+		if (sb_rdonly(sb)) {
+			UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
+		} else {
+			udf_warn(sb, "Damaged or missing LVID, forcing "
+				     "readonly mount\n");
+			ret = -EACCES;
+		}
+	}
 out_bh:
 	brelse(bh);
 	return ret;
@@ -1943,13 +1954,24 @@ static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
 	return 0;
 }
 
+static void udf_finalize_lvid(struct logicalVolIntegrityDesc *lvid)
+{
+	struct timespec64 ts;
+
+	ktime_get_real_ts64(&ts);
+	udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
+	lvid->descTag.descCRC = cpu_to_le16(
+		crc_itu_t(0, (char *)lvid + sizeof(struct tag),
+			le16_to_cpu(lvid->descTag.descCRCLength)));
+	lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
+}
+
 static void udf_open_lvid(struct super_block *sb)
 {
 	struct udf_sb_info *sbi = UDF_SB(sb);
 	struct buffer_head *bh = sbi->s_lvid_bh;
 	struct logicalVolIntegrityDesc *lvid;
 	struct logicalVolIntegrityDescImpUse *lvidiu;
-	struct timespec64 ts;
 
 	if (!bh)
 		return;
@@ -1961,18 +1983,12 @@ static void udf_open_lvid(struct super_block *sb)
 	mutex_lock(&sbi->s_alloc_mutex);
 	lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
 	lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
-	ktime_get_real_ts64(&ts);
-	udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
 	if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE)
 		lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
 	else
 		UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT);
 
-	lvid->descTag.descCRC = cpu_to_le16(
-		crc_itu_t(0, (char *)lvid + sizeof(struct tag),
-			le16_to_cpu(lvid->descTag.descCRCLength)));
-
-	lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
+	udf_finalize_lvid(lvid);
 	mark_buffer_dirty(bh);
 	sbi->s_lvid_dirty = 0;
 	mutex_unlock(&sbi->s_alloc_mutex);
@@ -1986,7 +2002,6 @@ static void udf_close_lvid(struct super_block *sb)
 	struct buffer_head *bh = sbi->s_lvid_bh;
 	struct logicalVolIntegrityDesc *lvid;
 	struct logicalVolIntegrityDescImpUse *lvidiu;
-	struct timespec64 ts;
 
 	if (!bh)
 		return;
@@ -1998,8 +2013,6 @@ static void udf_close_lvid(struct super_block *sb)
 	mutex_lock(&sbi->s_alloc_mutex);
 	lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
 	lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
-	ktime_get_real_ts64(&ts);
-	udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
 	if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
 		lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
 	if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
@@ -2009,17 +2022,13 @@ static void udf_close_lvid(struct super_block *sb)
 	if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT))
 		lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
 
-	lvid->descTag.descCRC = cpu_to_le16(
-			crc_itu_t(0, (char *)lvid + sizeof(struct tag),
-				le16_to_cpu(lvid->descTag.descCRCLength)));
-
-	lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
 	/*
 	 * We set buffer uptodate unconditionally here to avoid spurious
 	 * warnings from mark_buffer_dirty() when previous EIO has marked
 	 * the buffer as !uptodate
 	 */
 	set_buffer_uptodate(bh);
+	udf_finalize_lvid(lvid);
 	mark_buffer_dirty(bh);
 	sbi->s_lvid_dirty = 0;
 	mutex_unlock(&sbi->s_alloc_mutex);
@@ -2048,8 +2057,8 @@ u64 lvid_get_unique_id(struct super_block *sb)
 	if (!(++uniqueID & 0xFFFFFFFF))
 		uniqueID += 16;
 	lvhd->uniqueID = cpu_to_le64(uniqueID);
+	udf_updated_lvid(sb);
 	mutex_unlock(&sbi->s_alloc_mutex);
-	mark_buffer_dirty(bh);
 
 	return ret;
 }
@@ -2320,11 +2329,17 @@ static int udf_sync_fs(struct super_block *sb, int wait)
 
 	mutex_lock(&sbi->s_alloc_mutex);
 	if (sbi->s_lvid_dirty) {
+		struct buffer_head *bh = sbi->s_lvid_bh;
+		struct logicalVolIntegrityDesc *lvid;
+
+		lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
+		udf_finalize_lvid(lvid);
+
 		/*
 		 * Blockdevice will be synced later so we don't have to submit
 		 * the buffer for IO
 		 */
-		mark_buffer_dirty(sbi->s_lvid_bh);
+		mark_buffer_dirty(bh);
 		sbi->s_lvid_dirty = 0;
 	}
 	mutex_unlock(&sbi->s_alloc_mutex);