Merge tag 'for_v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull ext2, quota, udf fixes and cleanups from Jan Kara:

 - two small quota fixes (in grace time handling and possible missed
   accounting of preallocated blocks beyond EOF).

 - some ext2 cleanups

 - udf fixes for better compatibility with Windows 10 generated media
   (named streams, write-protection using domain-identifier, placement
   of volume recognition sequence)

 - some udf cleanups

* tag 'for_v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  quota: fix wrong condition in is_quota_modification()
  fs-udf: Delete an unnecessary check before brelse()
  ext2: Delete an unnecessary check before brelse()
  udf: Drop forward function declarations
  udf: Verify domain identifier fields
  udf: augment UDF permissions on new inodes
  udf: Use dynamic debug infrastructure
  udf: reduce leakage of blocks related to named streams
  udf: prevent allocation beyond UDF partition
  quota: fix condition for resetting time limit in do_set_dqblk()
  ext2: code cleanup for ext2_free_blocks()
  ext2: fix block range in ext2_data_block_valid()
  udf: support 2048-byte spacing of VRS descriptors on 4K media
  udf: refactor VRS descriptor identification

fs/ext2/balloc.c

@@ -490,9 +490,7 @@ void ext2_free_blocks (struct inode * inode, unsigned long block,
 	struct ext2_super_block * es = sbi->s_es;
 	unsigned freed = 0, group_freed;
 
-	if (block < le32_to_cpu(es->s_first_data_block) ||
-	    block + count < block ||
-	    block + count > le32_to_cpu(es->s_blocks_count)) {
+	if (!ext2_data_block_valid(sbi, block, count)) {
 		ext2_error (sb, "ext2_free_blocks",
 			    "Freeing blocks not in datazone - "
 			    "block = %lu, count = %lu", block, count);
@@ -1203,13 +1201,13 @@ int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
 			  unsigned int count)
 {
 	if ((start_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) ||
-	    (start_blk + count < start_blk) ||
-	    (start_blk > le32_to_cpu(sbi->s_es->s_blocks_count)))
+	    (start_blk + count - 1 < start_blk) ||
+	    (start_blk + count - 1 >= le32_to_cpu(sbi->s_es->s_blocks_count)))
 		return 0;
 
 	/* Ensure we do not step over superblock */
 	if ((start_blk <= sbi->s_sb_block) &&
-	    (start_blk + count >= sbi->s_sb_block))
+	    (start_blk + count - 1 >= sbi->s_sb_block))
 		return 0;
 
 	return 1;

fs/ext2/super.c

@@ -162,8 +162,7 @@ static void ext2_put_super (struct super_block * sb)
 	}
 	db_count = sbi->s_gdb_count;
 	for (i = 0; i < db_count; i++)
-		if (sbi->s_group_desc[i])
-			brelse (sbi->s_group_desc[i]);
+		brelse(sbi->s_group_desc[i]);
 	kfree(sbi->s_group_desc);
 	kfree(sbi->s_debts);
 	percpu_counter_destroy(&sbi->s_freeblocks_counter);

fs/ext2/xattr.c

@@ -794,7 +794,7 @@ ext2_xattr_delete_inode(struct inode *inode)
 	if (!EXT2_I(inode)->i_file_acl)
 		goto cleanup;
 
-	if (!ext2_data_block_valid(sbi, EXT2_I(inode)->i_file_acl, 0)) {
+	if (!ext2_data_block_valid(sbi, EXT2_I(inode)->i_file_acl, 1)) {
 		ext2_error(inode->i_sb, "ext2_xattr_delete_inode",
 			"inode %ld: xattr block %d is out of data blocks range",
 			inode->i_ino, EXT2_I(inode)->i_file_acl);

fs/quota/dquot.c

@@ -2731,7 +2731,7 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di)
 
 	if (check_blim) {
 		if (!dm->dqb_bsoftlimit ||
-		    dm->dqb_curspace + dm->dqb_rsvspace < dm->dqb_bsoftlimit) {
+		    dm->dqb_curspace + dm->dqb_rsvspace <= dm->dqb_bsoftlimit) {
 			dm->dqb_btime = 0;
 			clear_bit(DQ_BLKS_B, &dquot->dq_flags);
 		} else if (!(di->d_fieldmask & QC_SPC_TIMER))
@@ -2740,7 +2740,7 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di)
 	}
 	if (check_ilim) {
 		if (!dm->dqb_isoftlimit ||
-		    dm->dqb_curinodes < dm->dqb_isoftlimit) {
+		    dm->dqb_curinodes <= dm->dqb_isoftlimit) {
 			dm->dqb_itime = 0;
 			clear_bit(DQ_INODES_B, &dquot->dq_flags);
 		} else if (!(di->d_fieldmask & QC_INO_TIMER))

fs/udf/balloc.c

@@ -325,6 +325,17 @@ static udf_pblk_t udf_bitmap_new_block(struct super_block *sb,
 	newblock = bit + (block_group << (sb->s_blocksize_bits + 3)) -
 		(sizeof(struct spaceBitmapDesc) << 3);
 
+	if (newblock >= sbi->s_partmaps[partition].s_partition_len) {
+		/*
+		 * Ran off the end of the bitmap, and bits following are
+		 * non-compliant (not all zero)
+		 */
+		udf_err(sb, "bitmap for partition %d corrupted (block %u marked"
+			" as free, partition length is %u)\n", partition,
+			newblock, sbi->s_partmaps[partition].s_partition_len);
+		goto error_return;
+	}
+
 	if (!udf_clear_bit(bit, bh->b_data)) {
 		udf_debug("bit already cleared for block %d\n", bit);
 		goto repeat;

fs/udf/ecma_167.h

@@ -88,6 +88,20 @@ struct regid {
 #define ENTITYID_FLAGS_DIRTY		0x00
 #define ENTITYID_FLAGS_PROTECTED	0x01
 
+/* OSTA UDF 2.1.5.2 */
+#define UDF_ID_COMPLIANT "*OSTA UDF Compliant"
+
+/* OSTA UDF 2.1.5.3 */
+struct domainEntityIDSuffix {
+	uint16_t	revision;
+	uint8_t		flags;
+	uint8_t		reserved[5];
+};
+
+/* OSTA UDF 2.1.5.3 */
+#define ENTITYIDSUFFIX_FLAGS_HARDWRITEPROTECT 0
+#define ENTITYIDSUFFIX_FLAGS_SOFTWRITEPROTECT 1
+
 /* Volume Structure Descriptor (ECMA 167r3 2/9.1) */
 #define VSD_STD_ID_LEN			5
 struct volStructDesc {

fs/udf/file.c

@@ -280,6 +280,9 @@ static int udf_setattr(struct dentry *dentry, struct iattr *attr)
 			return error;
 	}
 
+	if (attr->ia_valid & ATTR_MODE)
+		udf_update_extra_perms(inode, attr->ia_mode);
+
 	setattr_copy(inode, attr);
 	mark_inode_dirty(inode);
 	return 0;

fs/udf/ialloc.c

@@ -118,6 +118,9 @@ struct inode *udf_new_inode(struct inode *dir, umode_t mode)
 	iinfo->i_lenAlloc = 0;
 	iinfo->i_use = 0;
 	iinfo->i_checkpoint = 1;
+	iinfo->i_extraPerms = FE_PERM_U_CHATTR;
+	udf_update_extra_perms(inode, mode);
+
 	if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
 		iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
 	else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))

fs/udf/inode.c

@@ -45,6 +45,13 @@
 
 #define EXTENT_MERGE_SIZE 5
 
+#define FE_MAPPED_PERMS	(FE_PERM_U_READ | FE_PERM_U_WRITE | FE_PERM_U_EXEC | \
+			 FE_PERM_G_READ | FE_PERM_G_WRITE | FE_PERM_G_EXEC | \
+			 FE_PERM_O_READ | FE_PERM_O_WRITE | FE_PERM_O_EXEC)
+
+#define FE_DELETE_PERMS	(FE_PERM_U_DELETE | FE_PERM_G_DELETE | \
+			 FE_PERM_O_DELETE)
+
 static umode_t udf_convert_permissions(struct fileEntry *);
 static int udf_update_inode(struct inode *, int);
 static int udf_sync_inode(struct inode *inode);
@@ -1458,6 +1465,8 @@ static int udf_read_inode(struct inode *inode, bool hidden_inode)
 	else
 		inode->i_mode = udf_convert_permissions(fe);
 	inode->i_mode &= ~sbi->s_umask;
+	iinfo->i_extraPerms = le32_to_cpu(fe->permissions) & ~FE_MAPPED_PERMS;
+
 	read_unlock(&sbi->s_cred_lock);
 
 	link_count = le16_to_cpu(fe->fileLinkCount);
@@ -1485,6 +1494,8 @@ static int udf_read_inode(struct inode *inode, bool hidden_inode)
 		iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
 		iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
 		iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
+		iinfo->i_streamdir = 0;
+		iinfo->i_lenStreams = 0;
 	} else {
 		inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
 		    (inode->i_sb->s_blocksize_bits - 9);
@@ -1498,6 +1509,16 @@ static int udf_read_inode(struct inode *inode, bool hidden_inode)
 		iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
 		iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
 		iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
+
+		/* Named streams */
+		iinfo->i_streamdir = (efe->streamDirectoryICB.extLength != 0);
+		iinfo->i_locStreamdir =
+			lelb_to_cpu(efe->streamDirectoryICB.extLocation);
+		iinfo->i_lenStreams = le64_to_cpu(efe->objectSize);
+		if (iinfo->i_lenStreams >= inode->i_size)
+			iinfo->i_lenStreams -= inode->i_size;
+		else
+			iinfo->i_lenStreams = 0;
 	}
 	inode->i_generation = iinfo->i_unique;
 
@@ -1619,6 +1640,23 @@ static umode_t udf_convert_permissions(struct fileEntry *fe)
 	return mode;
 }
 
+void udf_update_extra_perms(struct inode *inode, umode_t mode)
+{
+	struct udf_inode_info *iinfo = UDF_I(inode);
+
+	/*
+	 * UDF 2.01 sec. 3.3.3.3 Note 2:
+	 * In Unix, delete permission tracks write
+	 */
+	iinfo->i_extraPerms &= ~FE_DELETE_PERMS;
+	if (mode & 0200)
+		iinfo->i_extraPerms |= FE_PERM_U_DELETE;
+	if (mode & 0020)
+		iinfo->i_extraPerms |= FE_PERM_G_DELETE;
+	if (mode & 0002)
+		iinfo->i_extraPerms |= FE_PERM_O_DELETE;
+}
+
 int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
 {
 	return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
@@ -1691,10 +1729,7 @@ static int udf_update_inode(struct inode *inode, int do_sync)
 		   ((inode->i_mode & 0070) << 2) |
 		   ((inode->i_mode & 0700) << 4);
 
-	udfperms |= (le32_to_cpu(fe->permissions) &
-		    (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
-		     FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
-		     FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
+	udfperms |= iinfo->i_extraPerms;
 	fe->permissions = cpu_to_le32(udfperms);
 
 	if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
@@ -1760,9 +1795,19 @@ static int udf_update_inode(struct inode *inode, int do_sync)
 		       iinfo->i_ext.i_data,
 		       inode->i_sb->s_blocksize -
 					sizeof(struct extendedFileEntry));
-		efe->objectSize = cpu_to_le64(inode->i_size);
+		efe->objectSize =
+			cpu_to_le64(inode->i_size + iinfo->i_lenStreams);
 		efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
 
+		if (iinfo->i_streamdir) {
+			struct long_ad *icb_lad = &efe->streamDirectoryICB;
+
+			icb_lad->extLocation =
+				cpu_to_lelb(iinfo->i_locStreamdir);
+			icb_lad->extLength =
+				cpu_to_le32(inode->i_sb->s_blocksize);
+		}
+
 		udf_adjust_time(iinfo, inode->i_atime);
 		udf_adjust_time(iinfo, inode->i_mtime);
 		udf_adjust_time(iinfo, inode->i_ctime);

fs/udf/super.c

@@ -92,10 +92,6 @@ static void udf_put_super(struct super_block *);
 static int udf_sync_fs(struct super_block *, int);
 static int udf_remount_fs(struct super_block *, int *, char *);
 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
-static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
-			    struct kernel_lb_addr *);
-static void udf_load_fileset(struct super_block *, struct buffer_head *,
-			     struct kernel_lb_addr *);
 static void udf_open_lvid(struct super_block *);
 static void udf_close_lvid(struct super_block *);
 static unsigned int udf_count_free(struct super_block *);
@@ -151,9 +147,11 @@ static struct inode *udf_alloc_inode(struct super_block *sb)
 
 	ei->i_unique = 0;
 	ei->i_lenExtents = 0;
+	ei->i_lenStreams = 0;
 	ei->i_next_alloc_block = 0;
 	ei->i_next_alloc_goal = 0;
 	ei->i_strat4096 = 0;
+	ei->i_streamdir = 0;
 	init_rwsem(&ei->i_data_sem);
 	ei->cached_extent.lstart = -1;
 	spin_lock_init(&ei->i_extent_cache_lock);
@@ -271,8 +269,7 @@ static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
 	int nr_groups = bitmap->s_nr_groups;
 
 	for (i = 0; i < nr_groups; i++)
-		if (bitmap->s_block_bitmap[i])
-			brelse(bitmap->s_block_bitmap[i]);
+		brelse(bitmap->s_block_bitmap[i]);
 
 	kvfree(bitmap);
 }
@@ -646,16 +643,67 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
 	return error;
 }
 
-/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
-/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
-static loff_t udf_check_vsd(struct super_block *sb)
+/*
+ * Check VSD descriptor. Returns -1 in case we are at the end of volume
+ * recognition area, 0 if the descriptor is valid but non-interesting, 1 if
+ * we found one of NSR descriptors we are looking for.
+ */
+static int identify_vsd(const struct volStructDesc *vsd)
+{
+	int ret = 0;
+
+	if (!memcmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN)) {
+		switch (vsd->structType) {
+		case 0:
+			udf_debug("ISO9660 Boot Record found\n");
+			break;
+		case 1:
+			udf_debug("ISO9660 Primary Volume Descriptor found\n");
+			break;
+		case 2:
+			udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
+			break;
+		case 3:
+			udf_debug("ISO9660 Volume Partition Descriptor found\n");
+			break;
+		case 255:
+			udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
+			break;
+		default:
+			udf_debug("ISO9660 VRS (%u) found\n", vsd->structType);
+			break;
+		}
+	} else if (!memcmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN))
+		; /* ret = 0 */
+	else if (!memcmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN))
+		ret = 1;
+	else if (!memcmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN))
+		ret = 1;
+	else if (!memcmp(vsd->stdIdent, VSD_STD_ID_BOOT2, VSD_STD_ID_LEN))
+		; /* ret = 0 */
+	else if (!memcmp(vsd->stdIdent, VSD_STD_ID_CDW02, VSD_STD_ID_LEN))
+		; /* ret = 0 */
+	else {
+		/* TEA01 or invalid id : end of volume recognition area */
+		ret = -1;
+	}
+
+	return ret;
+}
+
+/*
+ * Check Volume Structure Descriptors (ECMA 167 2/9.1)
+ * We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1)
+ * @return   1 if NSR02 or NSR03 found,
+ *	    -1 if first sector read error, 0 otherwise
+ */
+static int udf_check_vsd(struct super_block *sb)
 {
 	struct volStructDesc *vsd = NULL;
 	loff_t sector = VSD_FIRST_SECTOR_OFFSET;
 	int sectorsize;
 	struct buffer_head *bh = NULL;
-	int nsr02 = 0;
-	int nsr03 = 0;
+	int nsr = 0;
 	struct udf_sb_info *sbi;
 
 	sbi = UDF_SB(sb);
@@ -679,71 +727,36 @@ static loff_t udf_check_vsd(struct super_block *sb)
 	 * activity. This actually happened with uninitialised SSD partitions
 	 * (all 0xFF) before the check for the limit and all valid IDs were
 	 * added */
-	for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
-	     sector += sectorsize) {
+	for (; !nsr && sector < VSD_MAX_SECTOR_OFFSET; sector += sectorsize) {
 		/* Read a block */
 		bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
 		if (!bh)
 			break;
 
-		/* Look for ISO  descriptors */
 		vsd = (struct volStructDesc *)(bh->b_data +
 					      (sector & (sb->s_blocksize - 1)));
-
-		if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
-				    VSD_STD_ID_LEN)) {
-			switch (vsd->structType) {
-			case 0:
-				udf_debug("ISO9660 Boot Record found\n");
-				break;
-			case 1:
-				udf_debug("ISO9660 Primary Volume Descriptor found\n");
-				break;
-			case 2:
-				udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
-				break;
-			case 3:
-				udf_debug("ISO9660 Volume Partition Descriptor found\n");
-				break;
-			case 255:
-				udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
-				break;
-			default:
-				udf_debug("ISO9660 VRS (%u) found\n",
-					  vsd->structType);
-				break;
-			}
-		} else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
-				    VSD_STD_ID_LEN))
-			; /* nothing */
-		else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
-				    VSD_STD_ID_LEN)) {
-			brelse(bh);
-			break;
-		} else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
-				    VSD_STD_ID_LEN))
-			nsr02 = sector;
-		else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
-				    VSD_STD_ID_LEN))
-			nsr03 = sector;
-		else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
-				    VSD_STD_ID_LEN))
-			; /* nothing */
-		else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
-				    VSD_STD_ID_LEN))
-			; /* nothing */
-		else {
-			/* invalid id : end of volume recognition area */
+		nsr = identify_vsd(vsd);
+		/* Found NSR or end? */
+		if (nsr) {
 			brelse(bh);
 			break;
 		}
+		/*
+		 * Special handling for improperly formatted VRS (e.g., Win10)
+		 * where components are separated by 2048 bytes even though
+		 * sectors are 4K
+		 */
+		if (sb->s_blocksize == 4096) {
+			nsr = identify_vsd(vsd + 1);
+			/* Ignore unknown IDs... */
+			if (nsr < 0)
+				nsr = 0;
+		}
 		brelse(bh);
 	}
 
-	if (nsr03)
-		return nsr03;
-	else if (nsr02)
-		return nsr02;
+	if (nsr > 0)
+		return 1;
 	else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
 			VSD_FIRST_SECTOR_OFFSET)
 		return -1;
@@ -751,34 +764,82 @@ static loff_t udf_check_vsd(struct super_block *sb)
 		return 0;
 }
 
+static int udf_verify_domain_identifier(struct super_block *sb,
+					struct regid *ident, char *dname)
+{
+	struct domainEntityIDSuffix *suffix;
+
+	if (memcmp(ident->ident, UDF_ID_COMPLIANT, strlen(UDF_ID_COMPLIANT))) {
+		udf_warn(sb, "Not OSTA UDF compliant %s descriptor.\n", dname);
+		goto force_ro;
+	}
+	if (ident->flags & (1 << ENTITYID_FLAGS_DIRTY)) {
+		udf_warn(sb, "Possibly not OSTA UDF compliant %s descriptor.\n",
+			 dname);
+		goto force_ro;
+	}
+	suffix = (struct domainEntityIDSuffix *)ident->identSuffix;
+	if (suffix->flags & (1 << ENTITYIDSUFFIX_FLAGS_HARDWRITEPROTECT) ||
+	    suffix->flags & (1 << ENTITYIDSUFFIX_FLAGS_SOFTWRITEPROTECT)) {
+		if (!sb_rdonly(sb)) {
+			udf_warn(sb, "Descriptor for %s marked write protected."
+				 " Forcing read only mount.\n", dname);
+		}
+		goto force_ro;
+	}
+	return 0;
+
+force_ro:
+	if (!sb_rdonly(sb))
+		return -EACCES;
+	UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
+	return 0;
+}
+
+static int udf_load_fileset(struct super_block *sb, struct fileSetDesc *fset,
+			    struct kernel_lb_addr *root)
+{
+	int ret;
+
+	ret = udf_verify_domain_identifier(sb, &fset->domainIdent, "file set");
+	if (ret < 0)
+		return ret;
+
+	*root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
+	UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
+
+	udf_debug("Rootdir at block=%u, partition=%u\n",
+		  root->logicalBlockNum, root->partitionReferenceNum);
+	return 0;
+}
+
 static int udf_find_fileset(struct super_block *sb,
 			    struct kernel_lb_addr *fileset,
 			    struct kernel_lb_addr *root)
 {
 	struct buffer_head *bh = NULL;
 	uint16_t ident;
+	int ret;
 
-	if (fileset->logicalBlockNum != 0xFFFFFFFF ||
-	    fileset->partitionReferenceNum != 0xFFFF) {
-		bh = udf_read_ptagged(sb, fileset, 0, &ident);
-
-		if (!bh) {
-			return 1;
-		} else if (ident != TAG_IDENT_FSD) {
-			brelse(bh);
-			return 1;
-		}
-
-		udf_debug("Fileset at block=%u, partition=%u\n",
-			  fileset->logicalBlockNum,
-			  fileset->partitionReferenceNum);
+	if (fileset->logicalBlockNum == 0xFFFFFFFF &&
+	    fileset->partitionReferenceNum == 0xFFFF)
+		return -EINVAL;
 
-		UDF_SB(sb)->s_partition = fileset->partitionReferenceNum;
-		udf_load_fileset(sb, bh, root);
+	bh = udf_read_ptagged(sb, fileset, 0, &ident);
+	if (!bh)
+		return -EIO;
+	if (ident != TAG_IDENT_FSD) {
 		brelse(bh);
-		return 0;
+		return -EINVAL;
 	}
-	return 1;
+
+	udf_debug("Fileset at block=%u, partition=%u\n",
+		  fileset->logicalBlockNum, fileset->partitionReferenceNum);
+
+	UDF_SB(sb)->s_partition = fileset->partitionReferenceNum;
+	ret = udf_load_fileset(sb, (struct fileSetDesc *)bh->b_data, root);
+	brelse(bh);
+	return ret;
 }
 
 /*
@@ -794,9 +855,7 @@ static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
 	struct buffer_head *bh;
 	uint16_t ident;
 	int ret = -ENOMEM;
-#ifdef UDFFS_DEBUG
 	struct timestamp *ts;
-#endif
 
 	outstr = kmalloc(128, GFP_NOFS);
 	if (!outstr)
@@ -817,13 +876,10 @@ static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
 
 	udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
 			      pvoldesc->recordingDateAndTime);
-#ifdef UDFFS_DEBUG
 	ts = &pvoldesc->recordingDateAndTime;
 	udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
 		  le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
 		  ts->minute, le16_to_cpu(ts->typeAndTimezone));
-#endif
-
 
 	ret = udf_dstrCS0toChar(sb, outstr, 31, pvoldesc->volIdent, 32);
 	if (ret < 0) {
@@ -939,21 +995,6 @@ static int udf_load_metadata_files(struct super_block *sb, int partition,
 	return 0;
 }
 
-static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
-			     struct kernel_lb_addr *root)
-{
-	struct fileSetDesc *fset;
-
-	fset = (struct fileSetDesc *)bh->b_data;
-
-	*root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
-
-	UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
-
-	udf_debug("Rootdir at block=%u, partition=%u\n",
-		  root->logicalBlockNum, root->partitionReferenceNum);
-}
-
 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
 {
 	struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
@@ -1238,9 +1279,7 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
 	 * PHYSICAL partitions are already set up
 	 */
 	type1_idx = i;
-#ifdef UDFFS_DEBUG
 	map = NULL; /* supress 'maybe used uninitialized' warning */
-#endif
 	for (i = 0; i < sbi->s_partitions; i++) {
 		map = &sbi->s_partmaps[i];
 
@@ -1364,6 +1403,10 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
 		goto out_bh;
 	}
 
+	ret = udf_verify_domain_identifier(sb, &lvd->domainIdent,
+					   "logical volume");
+	if (ret)
+		goto out_bh;
 	ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
 	if (ret)
 		goto out_bh;
@@ -1915,7 +1958,7 @@ static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
 			int silent, struct kernel_lb_addr *fileset)
 {
 	struct udf_sb_info *sbi = UDF_SB(sb);
-	loff_t nsr_off;
+	int nsr = 0;
 	int ret;
 
 	if (!sb_set_blocksize(sb, uopt->blocksize)) {
@@ -1926,13 +1969,13 @@ static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
 	sbi->s_last_block = uopt->lastblock;
 	if (!uopt->novrs) {
 		/* Check that it is NSR02 compliant */
-		nsr_off = udf_check_vsd(sb);
-		if (!nsr_off) {
+		nsr = udf_check_vsd(sb);
+		if (!nsr) {
 			if (!silent)
 				udf_warn(sb, "No VRS found\n");
 			return -EINVAL;
 		}
-		if (nsr_off == -1)
+		if (nsr == -1)
 			udf_debug("Failed to read sector at offset %d. "
 				  "Assuming open disc. Skipping validity "
 				  "check\n", VSD_FIRST_SECTOR_OFFSET);
@@ -2216,9 +2259,9 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
 		UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
 	}
 
-	if (udf_find_fileset(sb, &fileset, &rootdir)) {
+	ret = udf_find_fileset(sb, &fileset, &rootdir);
+	if (ret < 0) {
 		udf_warn(sb, "No fileset found\n");
-		ret = -EINVAL;
 		goto error_out;
 	}
 

fs/udf/udf_i.h

@@ -38,16 +38,20 @@ struct udf_inode_info {
 	__u32			i_next_alloc_block;
 	__u32			i_next_alloc_goal;
 	__u32			i_checkpoint;
+	__u32			i_extraPerms;
 	unsigned		i_alloc_type : 3;
 	unsigned		i_efe : 1;	/* extendedFileEntry */
 	unsigned		i_use : 1;	/* unallocSpaceEntry */
 	unsigned		i_strat4096 : 1;
-	unsigned		reserved : 26;
+	unsigned		i_streamdir : 1;
+	unsigned		reserved : 25;
 	union {
 		struct short_ad	*i_sad;
 		struct long_ad		*i_lad;
 		__u8		*i_data;
 	} i_ext;
+	struct kernel_lb_addr	i_locStreamdir;
+	__u64			i_lenStreams;
 	struct rw_semaphore	i_data_sem;
 	struct udf_ext_cache cached_extent;
 	/* Spinlock for protecting extent cache */

fs/udf/udfdecl.h

@@ -31,16 +31,8 @@ extern __printf(3, 4) void _udf_warn(struct super_block *sb,
 #define udf_info(fmt, ...)					\
 	pr_info("INFO " fmt, ##__VA_ARGS__)
 
-#undef UDFFS_DEBUG
-
-#ifdef UDFFS_DEBUG
-#define udf_debug(fmt, ...)					\
-	printk(KERN_DEBUG pr_fmt("%s:%d:%s: " fmt),		\
-	       __FILE__, __LINE__, __func__, ##__VA_ARGS__)
-#else
 #define udf_debug(fmt, ...)					\
-	no_printk(fmt, ##__VA_ARGS__)
-#endif
+	pr_debug("%s:%d:%s: " fmt, __FILE__, __LINE__, __func__, ##__VA_ARGS__)
 
 #define udf_fixed_to_variable(x) ( ( ( (x) >> 5 ) * 39 ) + ( (x) & 0x0000001F ) )
 #define udf_variable_to_fixed(x) ( ( ( (x) / 39 ) << 5 ) + ( (x) % 39 ) )
@@ -178,6 +170,7 @@ extern int8_t udf_next_aext(struct inode *, struct extent_position *,
 			    struct kernel_lb_addr *, uint32_t *, int);
 extern int8_t udf_current_aext(struct inode *, struct extent_position *,
 			       struct kernel_lb_addr *, uint32_t *, int);
+extern void udf_update_extra_perms(struct inode *inode, umode_t mode);
 
 /* misc.c */
 extern struct buffer_head *udf_tgetblk(struct super_block *sb,

include/linux/quotaops.h

@@ -22,7 +22,7 @@ static inline struct quota_info *sb_dqopt(struct super_block *sb)
 /* i_mutex must being held */
 static inline bool is_quota_modification(struct inode *inode, struct iattr *ia)
 {
-	return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_size) ||
+	return (ia->ia_valid & ATTR_SIZE) ||
 		(ia->ia_valid & ATTR_UID && !uid_eq(ia->ia_uid, inode->i_uid)) ||
 		(ia->ia_valid & ATTR_GID && !gid_eq(ia->ia_gid, inode->i_gid));
 }