From a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Wed, 5 Aug 2026 07:52:36 -0700 Subject: workqueue: skip the node_nr_active update for non-unbound workqueues apply_wqattrs_commit() updates node_nr_active->max unconditionally. wq->node_nr_active[] is only allocated for unbound workqueues, so guard the call before per-cpu workqueues start using this path. No functional change: only unbound workqueues reach apply_wqattrs_*() today. Signed-off-by: Breno Leitao Signed-off-by: Tejun Heo --- fs/hfsplus/ioctl.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 fs/hfsplus/ioctl.c (limited to 'fs/hfsplus/ioctl.c') diff --git a/fs/hfsplus/ioctl.c b/fs/hfsplus/ioctl.c new file mode 100644 index 000000000..40d04dba1 --- /dev/null +++ b/fs/hfsplus/ioctl.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/fs/hfsplus/ioctl.c + * + * Copyright (C) 2003 + * Ethan Benson + * partially derived from linux/fs/ext2/ioctl.c + * Copyright (C) 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * hfsplus ioctls + */ + +#include +#include +#include +#include +#include +#include "hfsplus_fs.h" + +/* + * "Blessing" an HFS+ filesystem writes metadata to the superblock informing + * the platform firmware which file to boot from + */ +static int hfsplus_ioctl_bless(struct file *file, int __user *user_flags) +{ + struct dentry *dentry = file->f_path.dentry; + struct inode *inode = d_inode(dentry); + struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); + struct hfsplus_vh *vh = sbi->s_vhdr; + struct hfsplus_vh *bvh = sbi->s_backup_vhdr; + u32 cnid = (unsigned long)dentry->d_fsdata; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + mutex_lock(&sbi->vh_mutex); + + /* Directory containing the bootable system */ + vh->finder_info[0] = bvh->finder_info[0] = + cpu_to_be32(d_parent_ino(dentry)); + + /* + * Bootloader. Just using the inode here breaks in the case of + * hard links - the firmware wants the ID of the hard link file, + * but the inode points at the indirect inode + */ + vh->finder_info[1] = bvh->finder_info[1] = cpu_to_be32(cnid); + + /* Per spec, the OS X system folder - same as finder_info[0] here */ + vh->finder_info[5] = bvh->finder_info[5] = + cpu_to_be32(d_parent_ino(dentry)); + + mutex_unlock(&sbi->vh_mutex); + return 0; +} + +long hfsplus_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + void __user *argp = (void __user *)arg; + + switch (cmd) { + case HFSPLUS_IOC_BLESS: + return hfsplus_ioctl_bless(file, argp); + default: + return -ENOTTY; + } +} -- cgit v1.3.1