f2fs: unify string length declarations and usage

This patch is intended to unify string length declarations and usage.
There are number of calls to strlen which return size_t object.
The size of this object depends on compiler if it will be bigger,
equal or even smaller than an unsigned int
Signed-off-by: Leon Romanovsky <leon@leon.nu>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

fs/f2fs/dir.c

@@ -75,7 +75,7 @@ static unsigned long dir_block_index(unsigned int level, unsigned int idx)
 	return bidx;
 }
 
-static bool early_match_name(const char *name, int namelen,
+static bool early_match_name(const char *name, size_t namelen,
 			f2fs_hash_t namehash, struct f2fs_dir_entry *de)
 {
 	if (le16_to_cpu(de->name_len) != namelen)
@@ -88,7 +88,7 @@ static bool early_match_name(const char *name, int namelen,
 }
 
 static struct f2fs_dir_entry *find_in_block(struct page *dentry_page,
-			const char *name, int namelen, int *max_slots,
+			const char *name, size_t namelen, int *max_slots,
 			f2fs_hash_t namehash, struct page **res_page)
 {
 	struct f2fs_dir_entry *de;
@@ -127,7 +127,7 @@ static struct f2fs_dir_entry *find_in_block(struct page *dentry_page,
 }
 
 static struct f2fs_dir_entry *find_in_level(struct inode *dir,
-		unsigned int level, const char *name, int namelen,
+		unsigned int level, const char *name, size_t namelen,
 			f2fs_hash_t namehash, struct page **res_page)
 {
 	int s = GET_DENTRY_SLOTS(namelen);
@@ -182,7 +182,7 @@ struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
 			struct qstr *child, struct page **res_page)
 {
 	const char *name = child->name;
-	int namelen = child->len;
+	size_t namelen = child->len;
 	unsigned long npages = dir_blocks(dir);
 	struct f2fs_dir_entry *de = NULL;
 	f2fs_hash_t name_hash;
@@ -383,7 +383,7 @@ int f2fs_add_link(struct dentry *dentry, struct inode *inode)
 	struct inode *dir = dentry->d_parent->d_inode;
 	struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
 	const char *name = dentry->d_name.name;
-	int namelen = dentry->d_name.len;
+	size_t namelen = dentry->d_name.len;
 	struct page *dentry_page = NULL;
 	struct f2fs_dentry_block *dentry_blk = NULL;
 	int slots = GET_DENTRY_SLOTS(namelen);

fs/f2fs/f2fs.h

@@ -881,7 +881,7 @@ int f2fs_sync_fs(struct super_block *, int);
 /*
  * hash.c
  */
-f2fs_hash_t f2fs_dentry_hash(const char *, int);
+f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
 
 /*
  * node.c

fs/f2fs/hash.c

@@ -42,7 +42,7 @@ static void TEA_transform(unsigned int buf[4], unsigned int const in[])
 	buf[1] += b1;
 }
 
-static void str2hashbuf(const char *msg, int len, unsigned int *buf, int num)
+static void str2hashbuf(const char *msg, size_t len, unsigned int *buf, int num)
 {
 	unsigned pad, val;
 	int i;
@@ -69,7 +69,7 @@ static void str2hashbuf(const char *msg, int len, unsigned int *buf, int num)
 		*buf++ = pad;
 }
 
-f2fs_hash_t f2fs_dentry_hash(const char *name, int len)
+f2fs_hash_t f2fs_dentry_hash(const char *name, size_t len)
 {
 	__u32 hash;
 	f2fs_hash_t f2fs_hash;
@@ -87,11 +87,13 @@ f2fs_hash_t f2fs_dentry_hash(const char *name, int len)
 	buf[3] = 0x10325476;
 
 	p = name;
-	while (len > 0) {
+	while (1) {
 		str2hashbuf(p, len, in, 4);
 		TEA_transform(buf, in);
-		len -= 16;
 		p += 16;
+		if (len <= 16)
+			break;
+		len -= 16;
 	}
 	hash = buf[0];
 	f2fs_hash = cpu_to_le32(hash & ~F2FS_HASH_COL_BIT);

fs/f2fs/namei.c

@@ -77,8 +77,8 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
 
 static int is_multimedia_file(const unsigned char *s, const char *sub)
 {
-	int slen = strlen(s);
-	int sublen = strlen(sub);
+	size_t slen = strlen(s);
+	size_t sublen = strlen(sub);
 	int ret;
 
 	if (sublen > slen)
@@ -250,7 +250,7 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
 	struct super_block *sb = dir->i_sb;
 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
 	struct inode *inode;
-	unsigned symlen = strlen(symname) + 1;
+	size_t symlen = strlen(symname) + 1;
 	int err;
 
 	f2fs_balance_fs(sbi);

fs/f2fs/xattr.c

@@ -208,7 +208,7 @@ int f2fs_getxattr(struct inode *inode, int name_index, const char *name,
 	struct page *page;
 	void *base_addr;
 	int error = 0, found = 0;
-	int value_len, name_len;
+	size_t value_len, name_len;
 
 	if (name == NULL)
 		return -EINVAL;
@@ -304,7 +304,8 @@ int f2fs_setxattr(struct inode *inode, int name_index, const char *name,
 	struct f2fs_xattr_entry *here, *last;
 	struct page *page;
 	void *base_addr;
-	int error, found, free, name_len, newsize;
+	int error, found, free, newsize;
+	size_t name_len;
 	char *pval;
 
 	if (name == NULL)