fs/ntfs3: Code refactoring

Check functions arguments. Use u8 instead of size_t for ntfs names, more consts and other.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

Author: aalexandrovich

fs/ntfs3/attrlist.c

@@ -375,8 +375,7 @@ bool al_remove_le(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le)
  * al_delete_le - Delete first le from the list which matches its parameters.
  */
 bool al_delete_le(struct ntfs_inode *ni, enum ATTR_TYPE type, CLST vcn,
-		  const __le16 *name, size_t name_len,
-		  const struct MFT_REF *ref)
+		  const __le16 *name, u8 name_len, const struct MFT_REF *ref)
 {
 	u16 size;
 	struct ATTR_LIST_ENTRY *le;

fs/ntfs3/frecord.c

@@ -384,7 +384,7 @@ bool ni_add_subrecord(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi)
  * ni_remove_attr - Remove all attributes for the given type/name/id.
  */
 int ni_remove_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
-		   const __le16 *name, size_t name_len, bool base_only,
+		   const __le16 *name, u8 name_len, bool base_only,
 		   const __le16 *id)
 {
 	int err;

fs/ntfs3/fsntfs.c

@@ -1661,7 +1661,8 @@ int ntfs_vbo_to_lbo(struct ntfs_sb_info *sbi, const struct runs_tree *run,
 	return 0;
 }
 
-struct ntfs_inode *ntfs_new_inode(struct ntfs_sb_info *sbi, CLST rno, bool dir)
+struct ntfs_inode *ntfs_new_inode(struct ntfs_sb_info *sbi, CLST rno,
+				  enum RECORD_FLAG flag)
 {
 	int err = 0;
 	struct super_block *sb = sbi->sb;
@@ -1673,8 +1674,7 @@ struct ntfs_inode *ntfs_new_inode(struct ntfs_sb_info *sbi, CLST rno, bool dir)
 
 	ni = ntfs_i(inode);
 
-	err = mi_format_new(&ni->mi, sbi, rno, dir ? RECORD_FLAG_DIR : 0,
-			    false);
+	err = mi_format_new(&ni->mi, sbi, rno, flag, false);
 	if (err)
 		goto out;
 
@@ -1937,7 +1937,7 @@ int ntfs_security_init(struct ntfs_sb_info *sbi)
 			break;
 
 		sii_e = (struct NTFS_DE_SII *)ne;
-		if (le16_to_cpu(ne->view.data_size) < SIZEOF_SECURITY_HDR)
+		if (le16_to_cpu(ne->view.data_size) < sizeof(sii_e->sec_hdr))
 			continue;
 
 		next_id = le32_to_cpu(sii_e->sec_id) + 1;
@@ -1998,18 +1998,18 @@ int ntfs_get_security_by_id(struct ntfs_sb_info *sbi, __le32 security_id,
 		goto out;
 
 	t32 = le32_to_cpu(sii_e->sec_hdr.size);
-	if (t32 < SIZEOF_SECURITY_HDR) {
+	if (t32 < sizeof(struct SECURITY_HDR)) {
 		err = -EINVAL;
 		goto out;
 	}
 
-	if (t32 > SIZEOF_SECURITY_HDR + 0x10000) {
+	if (t32 > sizeof(struct SECURITY_HDR) + 0x10000) {
 		/* Looks like too big security. 0x10000 - is arbitrary big number. */
 		err = -EFBIG;
 		goto out;
 	}
 
-	*size = t32 - SIZEOF_SECURITY_HDR;
+	*size = t32 - sizeof(struct SECURITY_HDR);
 
 	p = kmalloc(*size, GFP_NOFS);
 	if (!p) {
@@ -2023,14 +2023,14 @@ int ntfs_get_security_by_id(struct ntfs_sb_info *sbi, __le32 security_id,
 	if (err)
 		goto out;
 
-	if (memcmp(&d_security, &sii_e->sec_hdr, SIZEOF_SECURITY_HDR)) {
+	if (memcmp(&d_security, &sii_e->sec_hdr, sizeof(d_security))) {
 		err = -EINVAL;
 		goto out;
 	}
 
 	err = ntfs_read_run_nb(sbi, &ni->file.run,
 			       le64_to_cpu(sii_e->sec_hdr.off) +
-				       SIZEOF_SECURITY_HDR,
+				       sizeof(struct SECURITY_HDR),
 			       p, *size, NULL);
 	if (err)
 		goto out;
@@ -2069,7 +2069,7 @@ int ntfs_insert_security(struct ntfs_sb_info *sbi,
 	struct NTFS_DE_SDH sdh_e;
 	struct NTFS_DE_SII sii_e;
 	struct SECURITY_HDR *d_security;
-	u32 new_sec_size = size_sd + SIZEOF_SECURITY_HDR;
+	u32 new_sec_size = size_sd + sizeof(struct SECURITY_HDR);
 	u32 aligned_sec_size = ALIGN(new_sec_size, 16);
 	struct SECURITY_KEY hash_key;
 	struct ntfs_fnd *fnd_sdh = NULL;
@@ -2207,14 +2207,14 @@ int ntfs_insert_security(struct ntfs_sb_info *sbi,
 	/* Fill SII entry. */
 	sii_e.de.view.data_off =
 		cpu_to_le16(offsetof(struct NTFS_DE_SII, sec_hdr));
-	sii_e.de.view.data_size = cpu_to_le16(SIZEOF_SECURITY_HDR);
+	sii_e.de.view.data_size = cpu_to_le16(sizeof(struct SECURITY_HDR));
 	sii_e.de.view.res = 0;
-	sii_e.de.size = cpu_to_le16(SIZEOF_SII_DIRENTRY);
+	sii_e.de.size = cpu_to_le16(sizeof(struct NTFS_DE_SII));
 	sii_e.de.key_size = cpu_to_le16(sizeof(d_security->key.sec_id));
 	sii_e.de.flags = 0;
 	sii_e.de.res = 0;
 	sii_e.sec_id = d_security->key.sec_id;
-	memcpy(&sii_e.sec_hdr, d_security, SIZEOF_SECURITY_HDR);
+	memcpy(&sii_e.sec_hdr, d_security, sizeof(struct SECURITY_HDR));
 
 	err = indx_insert_entry(indx_sii, ni, &sii_e.de, NULL, NULL, 0);
 	if (err)
@@ -2223,15 +2223,15 @@ int ntfs_insert_security(struct ntfs_sb_info *sbi,
 	/* Fill SDH entry. */
 	sdh_e.de.view.data_off =
 		cpu_to_le16(offsetof(struct NTFS_DE_SDH, sec_hdr));
-	sdh_e.de.view.data_size = cpu_to_le16(SIZEOF_SECURITY_HDR);
+	sdh_e.de.view.data_size = cpu_to_le16(sizeof(struct SECURITY_HDR));
 	sdh_e.de.view.res = 0;
 	sdh_e.de.size = cpu_to_le16(SIZEOF_SDH_DIRENTRY);
 	sdh_e.de.key_size = cpu_to_le16(sizeof(sdh_e.key));
 	sdh_e.de.flags = 0;
 	sdh_e.de.res = 0;
 	sdh_e.key.hash = d_security->key.hash;
 	sdh_e.key.sec_id = d_security->key.sec_id;
-	memcpy(&sdh_e.sec_hdr, d_security, SIZEOF_SECURITY_HDR);
+	memcpy(&sdh_e.sec_hdr, d_security, sizeof(struct SECURITY_HDR));
 	sdh_e.magic[0] = cpu_to_le16('I');
 	sdh_e.magic[1] = cpu_to_le16('I');
 
@@ -2522,7 +2522,8 @@ void mark_as_free_ex(struct ntfs_sb_info *sbi, CLST lcn, CLST len, bool trim)
 /*
  * run_deallocate - Deallocate clusters.
  */
-int run_deallocate(struct ntfs_sb_info *sbi, struct runs_tree *run, bool trim)
+int run_deallocate(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+		   bool trim)
 {
 	CLST lcn, len;
 	size_t idx = 0;
@@ -2578,13 +2579,13 @@ static inline bool name_has_forbidden_chars(const struct le_str *fname)
 	return false;
 }
 
-static inline bool is_reserved_name(struct ntfs_sb_info *sbi,
+static inline bool is_reserved_name(const struct ntfs_sb_info *sbi,
 				    const struct le_str *fname)
 {
 	int port_digit;
 	const __le16 *name = fname->name;
 	int len = fname->len;
-	u16 *upcase = sbi->upcase;
+	const u16 *upcase = sbi->upcase;
 
 	/* check for 3 chars reserved names (device names) */
 	/* name by itself or with any extension is forbidden */

fs/ntfs3/inode.c

@@ -1309,7 +1309,7 @@ struct inode *ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir,
 	if (err)
 		goto out2;
 
-	ni = ntfs_new_inode(sbi, ino, fa & FILE_ATTRIBUTE_DIRECTORY);
+	ni = ntfs_new_inode(sbi, ino, S_ISDIR(mode) ? RECORD_FLAG_DIR : 0);
 	if (IS_ERR(ni)) {
 		err = PTR_ERR(ni);
 		ni = NULL;
@@ -1437,8 +1437,7 @@ struct inode *ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir,
 
 		root = Add2Ptr(attr, sizeof(I30_NAME) + SIZEOF_RESIDENT);
 		memcpy(root, dir_root, offsetof(struct INDEX_ROOT, ihdr));
-		root->ihdr.de_off =
-			cpu_to_le32(sizeof(struct INDEX_HDR)); // 0x10
+		root->ihdr.de_off = cpu_to_le32(sizeof(struct INDEX_HDR));
 		root->ihdr.used = cpu_to_le32(sizeof(struct INDEX_HDR) +
 					      sizeof(struct NTFS_DE));
 		root->ihdr.total = root->ihdr.used;

fs/ntfs3/ntfs.h

@@ -95,11 +95,10 @@ enum RECORD_NUM {
 	MFT_REC_BITMAP		= 6,
 	MFT_REC_BOOT		= 7,
 	MFT_REC_BADCLUST	= 8,
-	//MFT_REC_QUOTA		= 9,
-	MFT_REC_SECURE		= 9, // NTFS 3.0
+	MFT_REC_SECURE		= 9,
 	MFT_REC_UPCASE		= 10,
-	MFT_REC_EXTEND		= 11, // NTFS 3.0
-	MFT_REC_RESERVED	= 11,
+	MFT_REC_EXTEND		= 11,
+	MFT_REC_RESERVED	= 12,
 	MFT_REC_FREE		= 16,
 	MFT_REC_USER		= 24,
 };
@@ -109,7 +108,6 @@ enum ATTR_TYPE {
 	ATTR_STD		= cpu_to_le32(0x10),
 	ATTR_LIST		= cpu_to_le32(0x20),
 	ATTR_NAME		= cpu_to_le32(0x30),
-	// ATTR_VOLUME_VERSION on Nt4
 	ATTR_ID			= cpu_to_le32(0x40),
 	ATTR_SECURE		= cpu_to_le32(0x50),
 	ATTR_LABEL		= cpu_to_le32(0x60),
@@ -118,7 +116,6 @@ enum ATTR_TYPE {
 	ATTR_ROOT		= cpu_to_le32(0x90),
 	ATTR_ALLOC		= cpu_to_le32(0xA0),
 	ATTR_BITMAP		= cpu_to_le32(0xB0),
-	// ATTR_SYMLINK on Nt4
 	ATTR_REPARSE		= cpu_to_le32(0xC0),
 	ATTR_EA_INFO		= cpu_to_le32(0xD0),
 	ATTR_EA			= cpu_to_le32(0xE0),
@@ -144,6 +141,7 @@ enum FILE_ATTRIBUTE {
 	FILE_ATTRIBUTE_ENCRYPTED	= cpu_to_le32(0x00004000),
 	FILE_ATTRIBUTE_VALID_FLAGS	= cpu_to_le32(0x00007fb7),
 	FILE_ATTRIBUTE_DIRECTORY	= cpu_to_le32(0x10000000),
+	FILE_ATTRIBUTE_INDEX		= cpu_to_le32(0x20000000)
 };
 
 static_assert(sizeof(enum FILE_ATTRIBUTE) == 4);
@@ -266,7 +264,7 @@ enum RECORD_FLAG {
 	RECORD_FLAG_IN_USE	= cpu_to_le16(0x0001),
 	RECORD_FLAG_DIR		= cpu_to_le16(0x0002),
 	RECORD_FLAG_SYSTEM	= cpu_to_le16(0x0004),
-	RECORD_FLAG_UNKNOWN	= cpu_to_le16(0x0008),
+	RECORD_FLAG_INDEX	= cpu_to_le16(0x0008),
 };
 
 /* MFT Record structure. */
@@ -331,18 +329,18 @@ struct ATTR_NONRESIDENT {
 	__le64 svcn;		// 0x10: Starting VCN of this segment.
 	__le64 evcn;		// 0x18: End VCN of this segment.
 	__le16 run_off;		// 0x20: Offset to packed runs.
-	//  Unit of Compression size for this stream, expressed
-	//  as a log of the cluster size.
+	// Unit of Compression size for this stream, expressed
+	// as a log of the cluster size.
 	//
-	//	0 means file is not compressed
-	//	1, 2, 3, and 4 are potentially legal values if the
-	//	    stream is compressed, however the implementation
-	//	    may only choose to use 4, or possibly 3.  Note
-	//	    that 4 means cluster size time 16.	If convenient
-	//	    the implementation may wish to accept a
-	//	    reasonable range of legal values here (1-5?),
-	//	    even if the implementation only generates
-	//	    a smaller set of values itself.
+	// 0 means file is not compressed
+	// 1, 2, 3, and 4 are potentially legal values if the
+	// stream is compressed, however the implementation
+	// may only choose to use 4, or possibly 3.
+        // Note that 4 means cluster size time 16.
+        // If convenient the implementation may wish to accept a
+	// reasonable range of legal values here (1-5?),
+	// even if the implementation only generates
+	// a smaller set of values itself.
 	u8 c_unit;		// 0x22:
 	u8 res1[5];		// 0x23:
 	__le64 alloc_size;	// 0x28: The allocated size of attribute in bytes.
@@ -836,16 +834,22 @@ static_assert(sizeof(struct ATTR_DEF_ENTRY) == 0xa0);
 /* Object ID (0x40) */
 struct OBJECT_ID {
 	struct GUID ObjId;	// 0x00: Unique Id assigned to file.
-	struct GUID BirthVolumeId; // 0x10: Birth Volume Id is the Object Id of the Volume on.
-				// which the Object Id was allocated. It never changes.
-	struct GUID BirthObjectId; // 0x20: Birth Object Id is the first Object Id that was
-				// ever assigned to this MFT Record. I.e. If the Object Id
-				// is changed for some reason, this field will reflect the
-				// original value of the Object Id.
-	struct GUID DomainId;	// 0x30: Domain Id is currently unused but it is intended to be
-				// used in a network environment where the local machine is
-				// part of a Windows 2000 Domain. This may be used in a Windows
-				// 2000 Advanced Server managed domain.
+
+	// Birth Volume Id is the Object Id of the Volume on.
+	// which the Object Id was allocated. It never changes.
+	struct GUID BirthVolumeId; //0x10:
+	
+	// Birth Object Id is the first Object Id that was
+	// ever assigned to this MFT Record. I.e. If the Object Id
+	// is changed for some reason, this field will reflect the
+	// original value of the Object Id.
+	struct GUID BirthObjectId; // 0x20:
+
+	// Domain Id is currently unused but it is intended to be
+	// used in a network environment where the local machine is
+	// part of a Windows 2000 Domain. This may be used in a Windows
+	// 2000 Advanced Server managed domain.
+	struct GUID DomainId;	// 0x30:
 };
 
 static_assert(sizeof(struct OBJECT_ID) == 0x40);
@@ -855,42 +859,45 @@ struct NTFS_DE_O {
 	struct NTFS_DE de;
 	struct GUID ObjId;	// 0x10: Unique Id assigned to file.
 	struct MFT_REF ref;	// 0x20: MFT record number with this file.
-	struct GUID BirthVolumeId; // 0x28: Birth Volume Id is the Object Id of the Volume on
-				// which the Object Id was allocated. It never changes.
-	struct GUID BirthObjectId; // 0x38: Birth Object Id is the first Object Id that was
-				// ever assigned to this MFT Record. I.e. If the Object Id
-				// is changed for some reason, this field will reflect the
-				// original value of the Object Id.
-				// This field is valid if data_size == 0x48.
-	struct GUID BirthDomainId; // 0x48: Domain Id is currently unused but it is intended
-				// to be used in a network environment where the local
-				// machine is part of a Windows 2000 Domain. This may be
-				// used in a Windows 2000 Advanced Server managed domain.
+
+	// Birth Volume Id is the Object Id of the Volume on
+	// which the Object Id was allocated. It never changes.
+	struct GUID BirthVolumeId; // 0x28:
+
+	// Birth Object Id is the first Object Id that was
+	// ever assigned to this MFT Record. I.e. If the Object Id
+	// is changed for some reason, this field will reflect the
+	// original value of the Object Id.
+	// This field is valid if data_size == 0x48.
+	struct GUID BirthObjectId; // 0x38:
+
+	// Domain Id is currently unused but it is intended
+	// to be used in a network environment where the local
+	// machine is part of a Windows 2000 Domain. This may be
+	// used in a Windows 2000 Advanced Server managed domain.
+	struct GUID BirthDomainId; // 0x48:
 };
 
 static_assert(sizeof(struct NTFS_DE_O) == 0x58);
 
-#define NTFS_OBJECT_ENTRY_DATA_SIZE1					       \
-	0x38 // struct NTFS_DE_O.BirthDomainId is not used
-#define NTFS_OBJECT_ENTRY_DATA_SIZE2					       \
-	0x48 // struct NTFS_DE_O.BirthDomainId is used
-
 /* Q Directory entry structure ( rule = 0x11 ) */
 struct NTFS_DE_Q {
 	struct NTFS_DE de;
 	__le32 owner_id;	// 0x10: Unique Id assigned to file
+
+	/* here is 0x30 bytes of user quota. NOTE: 4 byte aligned! */
 	__le32 Version;		// 0x14: 0x02
-	__le32 flags2;		// 0x18: Quota flags, see above
+	__le32 Flags;		// 0x18: Quota flags, see above
 	__le64 BytesUsed;	// 0x1C:
 	__le64 ChangeTime;	// 0x24:
 	__le64 WarningLimit;	// 0x28:
 	__le64 HardLimit;	// 0x34:
 	__le64 ExceededTime;	// 0x3C:
 
 	// SID is placed here
-}; // sizeof() = 0x44
+}__packed; // sizeof() = 0x44
 
-#define SIZEOF_NTFS_DE_Q 0x44
+static_assert(sizeof(struct NTFS_DE_Q) == 0x44);
 
 #define SecurityDescriptorsBlockSize 0x40000 // 256K
 #define SecurityDescriptorMaxSize    0x20000 // 128K
@@ -912,7 +919,7 @@ struct SECURITY_HDR {
 	 */
 } __packed;
 
-#define SIZEOF_SECURITY_HDR 0x14
+static_assert(sizeof(struct SECURITY_HDR) == 0x14);
 
 /* SII Directory entry structure */
 struct NTFS_DE_SII {
@@ -921,7 +928,8 @@ struct NTFS_DE_SII {
 	struct SECURITY_HDR sec_hdr;	// 0x14:
 } __packed;
 
-#define SIZEOF_SII_DIRENTRY 0x28
+static_assert(offsetof(struct NTFS_DE_SII, sec_hdr) == 0x14);
+static_assert(sizeof(struct NTFS_DE_SII) == 0x28);
 
 /* SDH Directory entry structure */
 struct NTFS_DE_SDH {
@@ -1155,7 +1163,7 @@ struct REPARSE_DATA_BUFFER {
 
 #define FILE_NEED_EA 0x80 // See ntifs.h
 /*
- *FILE_NEED_EA, indicates that the file to which the EA belongs cannot be
+ * FILE_NEED_EA, indicates that the file to which the EA belongs cannot be
  * interpreted without understanding the associated extended attributes.
  */
 struct EA_INFO {