From: Chuck Lever <[email protected]> Upper layers such as NFSD need a way to query whether a filesystem handles filenames in a case-sensitive manner so they can provide correct semantics to remote clients. Without this information, NFS exports of ISO 9660 filesystems cannot properly advertise their filename case behavior.
Implement isofs_fileattr_get() to report ISO 9660 case handling behavior. The 'check=r' (relaxed) mount option enables case-insensitive lookups, and this setting determines the value reported through the file_kattr structure. By default, Joliet extensions operate in relaxed mode while plain ISO 9660 uses strict (case-sensitive) mode. All ISO 9660 variants are case-preserving, meaning filenames are stored exactly as they appear on the disc. The callback is registered only on isofs_dir_inode_operations because isofs has no custom inode_operations for regular files, and symlinks use the generic page_symlink_inode_operations. Reviewed-by: Jan Kara <[email protected]> Signed-off-by: Chuck Lever <[email protected]> --- fs/isofs/dir.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/fs/isofs/dir.c b/fs/isofs/dir.c index 09df40b612fb..7f95ddeb5991 100644 --- a/fs/isofs/dir.c +++ b/fs/isofs/dir.c @@ -12,6 +12,7 @@ * isofs directory handling functions */ #include <linux/gfp.h> +#include <linux/fileattr.h> #include "isofs.h" int isofs_name_translate(struct iso_directory_record *de, char *new, struct inode *inode) @@ -266,6 +267,15 @@ static int isofs_readdir(struct file *file, struct dir_context *ctx) return result; } +static int isofs_fileattr_get(struct dentry *dentry, struct file_kattr *fa) +{ + struct isofs_sb_info *sbi = ISOFS_SB(dentry->d_sb); + + /* ISO 9660 preserves case (the default). */ + fa->case_insensitive = sbi->s_check == 'r'; + return 0; +} + const struct file_operations isofs_dir_operations = { .llseek = generic_file_llseek, @@ -279,6 +289,7 @@ const struct file_operations isofs_dir_operations = const struct inode_operations isofs_dir_inode_operations = { .lookup = isofs_lookup, + .fileattr_get = isofs_fileattr_get, }; -- 2.52.0 _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
