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libfs: Export generic_ci_ dentry functions

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Export generic_ci_ dentry functions so they can be used by
case-insensitive filesystems that need something more custom than the
default one set by `struct generic_ci_dentry_ops`.

Reviewed-by: Gabriel Krisman Bertazi <gabriel@krisman.be>
Signed-off-by: André Almeida <andrealmeid@igalia.com>
Link: https://lore.kernel.org/r/20241021-tonyk-tmpfs-v8-5-f443d5814194@igalia.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
André Almeida 2024-10-21 13:37:21 -03:00 committed by Christian Brauner
parent 142fa60f61
commit 458532c8df
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GPG Key ID: 91C61BC06578DCA2
2 changed files with 9 additions and 3 deletions
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6
fs/libfs.c
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@ -1791,7 +1791,7 @@ bool is_empty_dir_inode(struct inode *inode)
*
* Return: 0 if names match, 1 if mismatch, or -ERRNO
*/
static int generic_ci_d_compare(const struct dentry *dentry, unsigned int len,
int generic_ci_d_compare(const struct dentry *dentry, unsigned int len,
const char *str, const struct qstr *name)
{
const struct dentry *parent;
@ -1835,6 +1835,7 @@ static int generic_ci_d_compare(const struct dentry *dentry, unsigned int len,
return utf8_strncasecmp(dentry->d_sb->s_encoding, name, &qstr);
}
EXPORT_SYMBOL(generic_ci_d_compare);
/**
* generic_ci_d_hash - generic d_hash implementation for casefolding filesystems
@ -1843,7 +1844,7 @@ static int generic_ci_d_compare(const struct dentry *dentry, unsigned int len,
*
* Return: 0 if hash was successful or unchanged, and -EINVAL on error
*/
static int generic_ci_d_hash(const struct dentry *dentry, struct qstr *str)
int generic_ci_d_hash(const struct dentry *dentry, struct qstr *str)
{
const struct inode *dir = READ_ONCE(dentry->d_inode);
struct super_block *sb = dentry->d_sb;
@ -1858,6 +1859,7 @@ static int generic_ci_d_hash(const struct dentry *dentry, struct qstr *str)
return -EINVAL;
return 0;
}
EXPORT_SYMBOL(generic_ci_d_hash);
static const struct dentry_operations generic_ci_dentry_ops = {
.d_hash = generic_ci_d_hash,

4
include/linux/fs.h
View File

@ -3458,6 +3458,10 @@ extern int generic_ci_match(const struct inode *parent,
const u8 *de_name, u32 de_name_len);
#if IS_ENABLED(CONFIG_UNICODE)
int generic_ci_d_hash(const struct dentry *dentry, struct qstr *str);
int generic_ci_d_compare(const struct dentry *dentry, unsigned int len,
const char *str, const struct qstr *name);
/**
* generic_ci_validate_strict_name - Check if a given name is suitable
* for a directory