diff options
Diffstat (limited to 'fs/ext4/dir.c')
| -rw-r--r-- | fs/ext4/dir.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 0ccd51f72048..884a6e776809 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -26,6 +26,7 @@ #include <linux/buffer_head.h> #include <linux/slab.h> #include <linux/iversion.h> +#include <linux/unicode.h> #include "ext4.h" #include "xattr.h" @@ -660,3 +661,50 @@ const struct file_operations ext4_dir_operations = { .open = ext4_dir_open, .release = ext4_release_dir, }; + +#ifdef CONFIG_UNICODE +static int ext4_d_compare(const struct dentry *dentry, unsigned int len, + const char *str, const struct qstr *name) +{ + struct qstr qstr = {.name = str, .len = len }; + + if (!IS_CASEFOLDED(dentry->d_parent->d_inode)) { + if (len != name->len) + return -1; + return !memcmp(str, name, len); + } + + return ext4_ci_compare(dentry->d_parent->d_inode, name, &qstr); +} + +static int ext4_d_hash(const struct dentry *dentry, struct qstr *str) +{ + const struct ext4_sb_info *sbi = EXT4_SB(dentry->d_sb); + const struct unicode_map *um = sbi->s_encoding; + unsigned char *norm; + int len, ret = 0; + + if (!IS_CASEFOLDED(dentry->d_inode)) + return 0; + + norm = kmalloc(PATH_MAX, GFP_ATOMIC); + if (!norm) + return -ENOMEM; + + len = utf8_casefold(um, str, norm, PATH_MAX); + if (len < 0) { + if (ext4_has_strict_mode(sbi)) + ret = -EINVAL; + goto out; + } + str->hash = full_name_hash(dentry, norm, len); +out: + kfree(norm); + return ret; +} + +const struct dentry_operations ext4_dentry_ops = { + .d_hash = ext4_d_hash, + .d_compare = ext4_d_compare, +}; +#endif |