From 467e245d47e6662a4cbf4184d9e6d0b1b120c0bf Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Wed, 16 Apr 2025 12:44:55 +0200 Subject: readdir: supply dir_context.count as readdir buffer size hint This is a preparation for large readdir buffers in fuse. Simply setting the fuse buffer size to the userspace buffer size should work, the record sizes are similar (fuse's is slightly larger than libc's, so no overflow should ever happen). Signed-off-by: Miklos Szeredi Signed-off-by: Jaco Kroon --- include/linux/fs.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index 0f2a1a572e3a..dfc5a3327124 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2071,6 +2071,13 @@ typedef bool (*filldir_t)(struct dir_context *, const char *, int, loff_t, u64, struct dir_context { filldir_t actor; loff_t pos; + /* + * Filesystems MUST NOT MODIFY count, but may use as a hint: + * 0 unknown + * > 0 space in buffer (assume at least one entry) + * INT_MAX unlimited + */ + int count; }; /* If OR-ed with d_type, pending signals are not checked */ -- cgit v1.2.3