From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266328AbUBDLoA (ORCPT ); Wed, 4 Feb 2004 06:44:00 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266340AbUBDLm2 (ORCPT ); Wed, 4 Feb 2004 06:42:28 -0500 Received: from e31.co.us.ibm.com ([32.97.110.129]:49132 "EHLO e31.co.us.ibm.com") by vger.kernel.org with ESMTP id S266326AbUBDLhQ (ORCPT ); Wed, 4 Feb 2004 06:37:16 -0500 Date: Wed, 4 Feb 2004 17:11:54 +0530 From: Maneesh Soni To: LKML Cc: Greg KH , Al Viro , Dipankar Sarma , "Martin J. Bligh" , Matt Mackall , Christian Borntraeger Subject: [RFC/T 6/6] sysfs backing store (with symlink) Message-ID: <20040204114154.GG4234@in.ibm.com> Reply-To: maneesh@in.ibm.com References: <20040204113758.GA4234@in.ibm.com> <20040204113848.GB4234@in.ibm.com> <20040204113920.GC4234@in.ibm.com> <20040204114003.GD4234@in.ibm.com> <20040204114037.GE4234@in.ibm.com> <20040204114106.GF4234@in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040204114106.GF4234@in.ibm.com> User-Agent: Mutt/1.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org o This patch has the changes require for attribute groups and misc. routines. fs/sysfs/group.c | 6 ++-- fs/sysfs/sysfs.h | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 78 insertions(+), 4 deletions(-) diff -puN fs/sysfs/sysfs.h~sysfs-leaves-misc fs/sysfs/sysfs.h --- linux-2.6.2-rc3/fs/sysfs/sysfs.h~sysfs-leaves-misc 2004-02-04 14:37:44.000000000 +0530 +++ linux-2.6.2-rc3-maneesh/fs/sysfs/sysfs.h 2004-02-04 14:37:44.000000000 +0530 @@ -1,4 +1,5 @@ +#include extern struct vfsmount * sysfs_mount; extern struct inode * sysfs_new_inode(mode_t mode); @@ -6,8 +7,81 @@ extern int sysfs_create(struct dentry *, extern struct dentry * sysfs_get_dentry(struct dentry *, const char *); -extern int sysfs_add_file(struct dentry * dir, const struct attribute * attr); +extern int sysfs_add_file(struct dentry *, const struct attribute *, int); extern void sysfs_hash_and_remove(struct dentry * dir, const char * name); extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **); extern void sysfs_remove_subdir(struct dentry *); + +extern loff_t sysfs_dir_lseek(struct file *, loff_t, int); +extern int sysfs_readdir(struct file *, void *, filldir_t); +extern void sysfs_umount_begin(struct super_block *); +extern char * sysfs_get_name(struct sysfs_dirent *); +extern struct dentry * sysfs_lookup(struct inode *, struct dentry *, struct nameidata *); +extern int sysfs_symlink(struct inode * dir, struct dentry *dentry, const char * symname); + +extern struct file_operations sysfs_file_operations; +extern struct file_operations bin_fops; +extern struct inode_operations sysfs_dir_inode_operations; +extern struct file_operations sysfs_dir_operations; + + +static inline +struct sysfs_dirent * sysfs_new_dirent(struct sysfs_dirent * p, void * e, int t) +{ + struct sysfs_dirent * sd; + + sd = kmalloc(sizeof(*sd), GFP_KERNEL); + if (!sd) + return NULL; + memset(sd, 0, sizeof(*sd)); + atomic_set(&sd->s_count, 1); + sd->s_element = e; + sd->s_type = t; + sd->s_dentry = NULL; + INIT_LIST_HEAD(&sd->s_children); + list_add(&sd->s_sibling, &p->s_children); + + return sd; +} + +static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd) +{ + if (sd) { + WARN_ON(!atomic_read(&sd->s_count)); + atomic_inc(&sd->s_count); + } + return sd; +} + +static inline void sysfs_put(struct sysfs_dirent * sd) +{ + if (atomic_dec_and_test(&sd->s_count)) { + if (sd->s_type & SYSFS_KOBJ_LINK) { + char ** link_names = sd->s_element; + kfree(link_names[1]); + kfree(sd->s_element); + } + kfree(sd); + } +} + +static inline +void sysfs_remove_dirent(struct sysfs_dirent * parent_sd, const char * name) +{ + struct list_head * tmp; + + tmp = parent_sd->s_children.next; + while (tmp != & parent_sd->s_children) { + struct sysfs_dirent * sd; + sd = list_entry(tmp, struct sysfs_dirent, s_sibling); + tmp = tmp->next; + if (sd->s_type & SYSFS_NOT_PINNED) { + if (!strcmp(sysfs_get_name(sd), name)) { + list_del_init(&sd->s_sibling); + sysfs_put(sd); + } + } + } +} + diff -puN fs/sysfs/group.c~sysfs-leaves-misc fs/sysfs/group.c --- linux-2.6.2-rc3/fs/sysfs/group.c~sysfs-leaves-misc 2004-02-04 14:37:44.000000000 +0530 +++ linux-2.6.2-rc3-maneesh/fs/sysfs/group.c 2004-02-04 14:38:21.000000000 +0530 @@ -31,7 +31,7 @@ static int create_files(struct dentry * int error = 0; for (attr = grp->attrs; *attr && !error; attr++) { - error = sysfs_add_file(dir,*attr); + error = sysfs_add_file(dir, *attr, SYSFS_KOBJ_ATTR); } if (error) remove_files(dir,grp); @@ -68,12 +68,12 @@ void sysfs_remove_group(struct kobject * if (grp->name) dir = sysfs_get_dentry(kobj->dentry,grp->name); else - dir = kobj->dentry; + dir = dget(kobj->dentry); remove_files(dir,grp); - dput(dir); if (grp->name) sysfs_remove_subdir(dir); + dput(dir); } _ -- Maneesh Soni Linux Technology Center, IBM Software Lab, Bangalore, India email: maneesh@in.ibm.com Phone: 91-80-5044999 Fax: 91-80-5268553 T/L : 9243696