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hfs: Implement fileattr_get for case sensitivity

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Report HFS case sensitivity behavior via the FS_XFLAG_CASEFOLD
flag. HFS is always case-insensitive (using Mac OS Roman case
folding) and always preserves case at rest.

Reviewed-by: Viacheslav Dubeyko <slava@dubeyko.com>
Reviewed-by: Roland Mainz <roland.mainz@nrubsig.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Link: https://patch.msgid.link/20260507-case-sensitivity-v14-6-e62cc8200435@oracle.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Chuck Lever 2026-05-07 04:52:59 -04:00 committed by Christian Brauner
parent eeb7b37b97
commit b6fe046c30
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3 changed files with 17 additions and 0 deletions
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1
fs/hfs/dir.c
View File

@ -328,4 +328,5 @@ const struct inode_operations hfs_dir_inode_operations = {
.rmdir = hfs_remove,
.rename = hfs_rename,
.setattr = hfs_inode_setattr,
.fileattr_get = hfs_fileattr_get,
};

2
fs/hfs/hfs_fs.h
View File

@ -177,6 +177,8 @@ extern int hfs_get_block(struct inode *inode, sector_t block,
extern const struct address_space_operations hfs_aops;
extern const struct address_space_operations hfs_btree_aops;
struct file_kattr;
int hfs_fileattr_get(struct dentry *dentry, struct file_kattr *fa);
int hfs_write_begin(const struct kiocb *iocb, struct address_space *mapping,
loff_t pos, unsigned int len, struct folio **foliop,
void **fsdata);

14
fs/hfs/inode.c
View File

@ -18,6 +18,7 @@
#include <linux/uio.h>
#include <linux/xattr.h>
#include <linux/blkdev.h>
#include <linux/fileattr.h>
#include "hfs_fs.h"
#include "btree.h"
@ -699,6 +700,18 @@ static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end,
return ret;
}
int hfs_fileattr_get(struct dentry *dentry, struct file_kattr *fa)
{
/*
* HFS compares filenames using Mac OS Roman case folding, so
* lookup is always case-insensitive. Names are stored on disk
* with case intact; CASENONPRESERVING stays clear.
*/
fa->fsx_xflags |= FS_XFLAG_CASEFOLD;
fa->flags |= FS_CASEFOLD_FL;
return 0;
}
static const struct file_operations hfs_file_operations = {
.llseek = generic_file_llseek,
.read_iter = generic_file_read_iter,
@ -715,4 +728,5 @@ static const struct inode_operations hfs_file_inode_operations = {
.lookup = hfs_file_lookup,
.setattr = hfs_inode_setattr,
.listxattr = generic_listxattr,
.fileattr_get = hfs_fileattr_get,
};