| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 23 Sep 2022 15:02:45 +0300
From: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
To: <ntfs3@...ts.linux.dev>
CC: LKML <linux-kernel@...r.kernel.org>,
<linux-fsdevel@...r.kernel.org>
Subject: [PATCH 1/2] fs/ntfs3: Add option "nocase"
This commit adds mount option and additional functions.
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
---
fs/ntfs3/index.c | 2 +-
fs/ntfs3/namei.c | 139 +++++++++++++++++++++++++++++++++++++++++++++
fs/ntfs3/ntfs_fs.h | 4 ++
fs/ntfs3/super.c | 6 ++
fs/ntfs3/upcase.c | 12 ++++
5 files changed, 162 insertions(+), 1 deletion(-)
diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
index 440328147e7e..613036f9c6e6 100644
--- a/fs/ntfs3/index.c
+++ b/fs/ntfs3/index.c
@@ -47,7 +47,7 @@ static int cmp_fnames(const void *key1, size_t l1, const void *key2, size_t l2,
if (l2 < fsize2)
return -1;
- both_case = f2->type != FILE_NAME_DOS /*&& !sbi->options.nocase*/;
+ both_case = f2->type != FILE_NAME_DOS && !sbi->options->nocase;
if (!l1) {
const struct le_str *s2 = (struct le_str *)&f2->name_len;
diff --git a/fs/ntfs3/namei.c b/fs/ntfs3/namei.c
index bc22cc321a74..315763eb05ff 100644
--- a/fs/ntfs3/namei.c
+++ b/fs/ntfs3/namei.c
@@ -7,6 +7,7 @@
#include <linux/fs.h>
#include <linux/nls.h>
+#include <linux/ctype.h>
#include "debug.h"
#include "ntfs.h"
@@ -355,6 +356,138 @@ struct dentry *ntfs3_get_parent(struct dentry *child)
return ERR_PTR(-ENOENT);
}
+/*
+ * dentry_operations::d_hash
+ */
+static int ntfs_d_hash(const struct dentry *dentry, struct qstr *name)
+{
+ struct ntfs_sb_info *sbi;
+ const char *n = name->name;
+ unsigned int len = name->len;
+ unsigned long hash;
+ struct cpu_str *uni;
+ unsigned int c;
+ int err;
+
+ /* First try fast implementation. */
+ hash = init_name_hash(dentry);
+
+ for (;;) {
+ if (!len--) {
+ name->hash = end_name_hash(hash);
+ return 0;
+ }
+
+ c = *n++;
+ if (c >= 0x80)
+ break;
+
+ hash = partial_name_hash(toupper(c), hash);
+ }
+
+ /*
+ * Try slow way with current upcase table
+ */
+ uni = __getname();
+ if (!uni)
+ return -ENOMEM;
+
+ sbi = dentry->d_sb->s_fs_info;
+
+ err = ntfs_nls_to_utf16(sbi, name->name, name->len, uni, NTFS_NAME_LEN,
+ UTF16_HOST_ENDIAN);
+ if (err < 0)
+ goto out;
+
+ if (!err) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ hash = ntfs_names_hash(uni->name, uni->len, sbi->upcase,
+ init_name_hash(dentry));
+ name->hash = end_name_hash(hash);
+ err = 0;
+
+out:
+ __putname(uni);
+ return err;
+}
+
+/*
+ * dentry_operations::d_compare
+ */
+static int ntfs_d_compare(const struct dentry *dentry, unsigned int len1,
+ const char *str, const struct qstr *name)
+{
+ struct ntfs_sb_info *sbi;
+ int ret;
+ const char *n1 = str;
+ const char *n2 = name->name;
+ unsigned int len2 = name->len;
+ unsigned int lm = min(len1, len2);
+ unsigned char c1, c2;
+ struct cpu_str *uni1, *uni2;
+
+ /* First try fast implementation. */
+ for (;;) {
+ if (!lm--) {
+ ret = len1 == len2 ? 0 : 1;
+ goto out;
+ }
+
+ if ((c1 = *n1++) == (c2 = *n2++))
+ continue;
+
+ if (c1 >= 0x80 || c2 >= 0x80)
+ break;
+
+ if (toupper(c1) != toupper(c2)) {
+ ret = 1;
+ goto out;
+ }
+ }
+
+ /*
+ * Try slow way with current upcase table
+ */
+ sbi = dentry->d_sb->s_fs_info;
+ uni1 = __getname();
+ if (!uni1)
+ return -ENOMEM;
+
+ ret = ntfs_nls_to_utf16(sbi, str, len1, uni1, NTFS_NAME_LEN,
+ UTF16_HOST_ENDIAN);
+ if (ret < 0)
+ goto out;
+
+ if (!ret) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ uni2 = Add2Ptr(uni1, 2048);
+
+ ret = ntfs_nls_to_utf16(sbi, name->name, name->len, uni2, NTFS_NAME_LEN,
+ UTF16_HOST_ENDIAN);
+ if (ret < 0)
+ goto out;
+
+ if (!ret) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = !ntfs_cmp_names(uni1->name, uni1->len, uni2->name, uni2->len,
+ sbi->upcase, false)
+ ? 0
+ : 1;
+
+out:
+ __putname(uni1);
+ return ret;
+}
+
// clang-format off
const struct inode_operations ntfs_dir_inode_operations = {
.lookup = ntfs_lookup,
@@ -382,4 +515,10 @@ const struct inode_operations ntfs_special_inode_operations = {
.get_acl = ntfs_get_acl,
.set_acl = ntfs_set_acl,
};
+
+const struct dentry_operations ntfs_dentry_ops = {
+ .d_hash = ntfs_d_hash,
+ .d_compare = ntfs_d_compare,
+};
+
// clang-format on
diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
index cd680ada50ab..6c1c7ef3b2d6 100644
--- a/fs/ntfs3/ntfs_fs.h
+++ b/fs/ntfs3/ntfs_fs.h
@@ -101,6 +101,7 @@ struct ntfs_mount_options {
unsigned force : 1; /* RW mount dirty volume. */
unsigned noacsrules : 1; /* Exclude acs rules. */
unsigned prealloc : 1; /* Preallocate space when file is growing. */
+ unsigned nocase : 1; /* case insensitive. */
};
/* Special value to unpack and deallocate. */
@@ -721,6 +722,7 @@ struct dentry *ntfs3_get_parent(struct dentry *child);
extern const struct inode_operations ntfs_dir_inode_operations;
extern const struct inode_operations ntfs_special_inode_operations;
+extern const struct dentry_operations ntfs_dentry_ops;
/* Globals from record.c */
int mi_get(struct ntfs_sb_info *sbi, CLST rno, struct mft_inode **mi);
@@ -840,6 +842,8 @@ int ntfs_cmp_names(const __le16 *s1, size_t l1, const __le16 *s2, size_t l2,
const u16 *upcase, bool bothcase);
int ntfs_cmp_names_cpu(const struct cpu_str *uni1, const struct le_str *uni2,
const u16 *upcase, bool bothcase);
+unsigned long ntfs_names_hash(const u16 *name, size_t len, const u16 *upcase,
+ unsigned long hash);
/* globals from xattr.c */
#ifdef CONFIG_NTFS3_FS_POSIX_ACL
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index 87d9eabf9847..d72a27abf1c8 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -253,6 +253,7 @@ enum Opt {
Opt_iocharset,
Opt_prealloc,
Opt_noacsrules,
+ Opt_nocase,
Opt_err,
};
@@ -272,6 +273,7 @@ static const struct fs_parameter_spec ntfs_fs_parameters[] = {
fsparam_flag_no("showmeta", Opt_showmeta),
fsparam_flag_no("prealloc", Opt_prealloc),
fsparam_flag_no("acsrules", Opt_noacsrules),
+ fsparam_flag_no("nocase", Opt_nocase),
fsparam_string("iocharset", Opt_iocharset),
{}
};
@@ -383,6 +385,9 @@ static int ntfs_fs_parse_param(struct fs_context *fc,
case Opt_noacsrules:
opts->noacsrules = result.negated ? 1 : 0;
break;
+ case Opt_nocase:
+ opts->nocase = result.negated ? 1 : 0;
+ break;
default:
/* Should not be here unless we forget add case. */
return -EINVAL;
@@ -936,6 +941,7 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
sb->s_export_op = &ntfs_export_ops;
sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec
sb->s_xattr = ntfs_xattr_handlers;
+ sb->s_d_op = sbi->options->nocase ? &ntfs_dentry_ops : NULL;
sbi->options->nls = ntfs_load_nls(sbi->options->nls_name);
if (IS_ERR(sbi->options->nls)) {
diff --git a/fs/ntfs3/upcase.c b/fs/ntfs3/upcase.c
index b5e8256fd710..7681eefacb4b 100644
--- a/fs/ntfs3/upcase.c
+++ b/fs/ntfs3/upcase.c
@@ -102,3 +102,15 @@ int ntfs_cmp_names_cpu(const struct cpu_str *uni1, const struct le_str *uni2,
diff2 = l1 - l2;
return diff2 ? diff2 : diff1;
}
+
+/* Helper function for ntfs_d_hash. */
+unsigned long ntfs_names_hash(const u16 *name, size_t len, const u16 *upcase,
+ unsigned long hash)
+{
+ while (len--) {
+ unsigned int c = upcase_unicode_char(upcase, *name++);
+ hash = partial_name_hash(c, hash);
+ }
+
+ return hash;
+}
--
2.37.0
Powered by blists - more mailing lists