lkml.org 
[lkml]   [2003]   [Oct]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[RFC 4/6] sysfs-symlink.patch


o This patch creates symlink kobject. We don't create the symlink in sysfs
when sysfs_create_symlink() is called but just allocates one kobject to act
as symlink. Again this code should be part of kobject code. But to keep the
interfaces same it is in sysfs code.


fs/sysfs/symlink.c | 41 +++++++++++++++++++++++++++++------------
1 files changed, 29 insertions(+), 12 deletions(-)

diff -puN fs/sysfs/symlink.c~sysfs-symlink fs/sysfs/symlink.c
--- linux-2.6.0-test6/fs/sysfs/symlink.c~sysfs-symlink 2003-10-06 12:08:04.000000000 +0530
+++ linux-2.6.0-test6-maneesh/fs/sysfs/symlink.c 2003-10-06 12:14:43.000000000 +0530
@@ -15,7 +15,8 @@ static int init_symlink(struct inode * i
return 0;
}

-static int sysfs_symlink(struct inode * dir, struct dentry *dentry, const char * symname)
+int sysfs_symlink(struct inode * dir, struct dentry *dentry,
+ const char * symname)
{
int error;

@@ -71,13 +72,12 @@ static void fill_object_path(struct kobj
*/
int sysfs_create_link(struct kobject * kobj, struct kobject * target, char * name)
{
- struct dentry * dentry = kobj->dentry;
- struct dentry * d;
int error = 0;
int size;
int depth;
char * path;
char * s;
+ struct kobject * link;

depth = object_depth(kobj);
size = object_path_length(target) + depth * 3 - 1;
@@ -96,15 +96,19 @@ int sysfs_create_link(struct kobject * k
fill_object_path(target,path,size);
pr_debug("%s: path = '%s'\n",__FUNCTION__,path);

- down(&dentry->d_inode->i_sem);
- d = sysfs_get_dentry(dentry,name);
- if (!IS_ERR(d))
- error = sysfs_symlink(dentry->d_inode,d,path);
- else
- error = PTR_ERR(d);
- dput(d);
- up(&dentry->d_inode->i_sem);
- kfree(path);
+ link = kmalloc(sizeof(struct kobject), GFP_KERNEL);
+ if (!link) {
+ kfree(path);
+ return -ENOMEM;
+ }
+ memset(link, 0, sizeof(struct kobject));
+ kobject_init(link);
+ kobject_set_name(link, name);
+ link->k_symlink = path;
+ down_write(&kobj->k_rwsem);
+ list_add(&link->k_sibling, &kobj->k_children);
+ up_write(&kobj->k_rwsem);
+ link->dentry = NULL;
return error;
}

@@ -117,6 +121,19 @@ int sysfs_create_link(struct kobject * k

void sysfs_remove_link(struct kobject * kobj, char * name)
{
+ struct list_head * tmp;
+
+ down_write(&kobj->k_rwsem);
+ tmp = kobj->k_sibling.next;
+ while (tmp != &kobj->k_sibling) {
+ struct kobject * k = list_entry(tmp, struct kobject, k_sibling);
+ tmp = tmp->next;
+ if (!strcmp(kobject_name(k), name) && (k->k_symlink)) {
+ kfree(k->k_symlink);
+ kobject_cleanup(k);
+ }
+ }
+ up_write(&kobj->k_rwsem);
sysfs_hash_and_remove(kobj->dentry,name);
}

_
--
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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:49    [W:0.183 / U:0.228 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site