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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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90bc61359d
While shadow directories appear to be a good idea, the current scheme
of controlling their creation and destruction outside of sysfs appears
to be a locking and maintenance nightmare in the face of sysfs
directories dynamically coming and going. Which can now occur for
directories containing network devices when CONFIG_SYSFS_DEPRECATED is
not set.
This patch removes everything from the initial shadow directory support
that allowed the shadow directory creation to be controlled at a higher
level. So except for a few bits of sysfs_rename_dir everything from
commit b592fcfe7f is now gone.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
/*
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* fs/sysfs/group.c - Operations for adding/removing multiple files at once.
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*
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* Copyright (c) 2003 Patrick Mochel
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* Copyright (c) 2003 Open Source Development Lab
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*
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* This file is released undert the GPL v2.
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*
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*/
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#include <linux/kobject.h>
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#include <linux/module.h>
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#include <linux/dcache.h>
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#include <linux/namei.h>
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#include <linux/err.h>
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#include "sysfs.h"
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static void remove_files(struct sysfs_dirent *dir_sd,
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const struct attribute_group *grp)
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{
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struct attribute *const* attr;
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for (attr = grp->attrs; *attr; attr++)
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sysfs_hash_and_remove(dir_sd, (*attr)->name);
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}
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static int create_files(struct sysfs_dirent *dir_sd,
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const struct attribute_group *grp)
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{
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struct attribute *const* attr;
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int error = 0;
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for (attr = grp->attrs; *attr && !error; attr++)
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error = sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR);
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if (error)
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remove_files(dir_sd, grp);
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return error;
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}
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int sysfs_create_group(struct kobject * kobj,
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const struct attribute_group * grp)
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{
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struct sysfs_dirent *sd;
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int error;
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BUG_ON(!kobj || !kobj->sd);
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if (grp->name) {
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error = sysfs_create_subdir(kobj, grp->name, &sd);
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if (error)
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return error;
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} else
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sd = kobj->sd;
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sysfs_get(sd);
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error = create_files(sd, grp);
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if (error) {
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if (grp->name)
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sysfs_remove_subdir(sd);
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}
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sysfs_put(sd);
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return error;
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}
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void sysfs_remove_group(struct kobject * kobj,
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const struct attribute_group * grp)
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{
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struct sysfs_dirent *dir_sd = kobj->sd;
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struct sysfs_dirent *sd;
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if (grp->name) {
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sd = sysfs_get_dirent(dir_sd, grp->name);
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BUG_ON(!sd);
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} else
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sd = sysfs_get(dir_sd);
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remove_files(sd, grp);
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if (grp->name)
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sysfs_remove_subdir(sd);
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sysfs_put(sd);
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}
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EXPORT_SYMBOL_GPL(sysfs_create_group);
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EXPORT_SYMBOL_GPL(sysfs_remove_group);
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