From 1e504cf85dddb9dd2f4c262a72277d2f9564cbea Mon Sep 17 00:00:00 2001 From: Russell King Date: Sun, 24 Mar 2019 10:54:03 +0000 Subject: [PATCH] fs/adfs: factor out filename comparison We have essentially the same code in adfs_compare() as adfs_match(), so arrange to use a common implementation. Acked-by: Al Viro Signed-off-by: Russell King --- fs/adfs/dir.c | 68 ++++++++++++++++++++------------------------------- 1 file changed, 26 insertions(+), 42 deletions(-) diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c index e18eff854e1a..bebe2ab86aae 100644 --- a/fs/adfs/dir.c +++ b/fs/adfs/dir.c @@ -100,37 +100,39 @@ out: return ret; } -static int -adfs_match(const struct qstr *name, struct object_info *obj) +static int __adfs_compare(const unsigned char *qstr, u32 qlen, + const char *str, u32 len) { - int i; + u32 i; - if (name->len != obj->name_len) - return 0; + if (qlen != len) + return 1; - for (i = 0; i < name->len; i++) { - char c1, c2; + for (i = 0; i < qlen; i++) { + unsigned char qc, c; - c1 = name->name[i]; - c2 = obj->name[i]; + qc = qstr[i]; + c = str[i]; - if (c1 >= 'A' && c1 <= 'Z') - c1 += 'a' - 'A'; - if (c2 >= 'A' && c2 <= 'Z') - c2 += 'a' - 'A'; + if (qc >= 'A' && qc <= 'Z') + qc += 'a' - 'A'; + if (c >= 'A' && c <= 'Z') + c += 'a' - 'A'; - if (c1 != c2) - return 0; + if (qc != c) + return 1; } - return 1; + return 0; } -static int -adfs_dir_lookup_byname(struct inode *inode, const struct qstr *name, struct object_info *obj) +static int adfs_dir_lookup_byname(struct inode *inode, const struct qstr *qstr, + struct object_info *obj) { struct super_block *sb = inode->i_sb; const struct adfs_dir_ops *ops = ADFS_SB(sb)->s_dir; + const unsigned char *name; struct adfs_dir dir; + u32 name_len; int ret; ret = ops->read(sb, inode->i_ino, inode->i_size, &dir); @@ -153,8 +155,10 @@ adfs_dir_lookup_byname(struct inode *inode, const struct qstr *name, struct obje goto unlock_out; ret = -ENOENT; + name = qstr->name; + name_len = qstr->len; while (ops->getnext(&dir, obj) == 0) { - if (adfs_match(name, obj)) { + if (!__adfs_compare(name, name_len, obj->name, obj->name_len)) { ret = 0; break; } @@ -212,30 +216,10 @@ adfs_hash(const struct dentry *parent, struct qstr *qstr) * Compare two names, taking note of the name length * requirements of the underlying filesystem. */ -static int -adfs_compare(const struct dentry *dentry, - unsigned int len, const char *str, const struct qstr *name) +static int adfs_compare(const struct dentry *dentry, unsigned int len, + const char *str, const struct qstr *qstr) { - int i; - - if (len != name->len) - return 1; - - for (i = 0; i < name->len; i++) { - char a, b; - - a = str[i]; - b = name->name[i]; - - if (a >= 'A' && a <= 'Z') - a += 'a' - 'A'; - if (b >= 'A' && b <= 'Z') - b += 'a' - 'A'; - - if (a != b) - return 1; - } - return 0; + return __adfs_compare(qstr->name, qstr->len, str, len); } const struct dentry_operations adfs_dentry_operations = { -- 2.30.2