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sysfs: add sysfs_dirent->s_name

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Add s_name to sysfs_dirent.  This is to further reduce dependency to
the associated dentry.  Name is copied for directories and symlinks
but not for attributes.

Where possible, name dereferences are converted to use sd->s_name.
sysfs_symlink->link_name and sysfs_get_name() are unused now and
removed.

This change allows symlink to be implemented using sysfs_dirent tree
proper, which is the last remaining dentry-dependent sysfs walk.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Tejun Heo
2007-06-14 03:45:15 +09:00
committed by Greg Kroah-Hartman
parent 13b3086d2e
commit 0c096b507f
6 changed files with 52 additions and 68 deletions
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33
fs/sysfs/inode.c
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@@ -191,37 +191,6 @@ int sysfs_create(struct dentry * dentry, int mode, int (*init)(struct inode *))
return error;
}
/*
* Get the name for corresponding element represented by the given sysfs_dirent
*/
const unsigned char * sysfs_get_name(struct sysfs_dirent *sd)
{
struct attribute * attr;
struct bin_attribute * bin_attr;
struct sysfs_symlink * sl;
BUG_ON(!sd || !sd->s_element);
switch (sd->s_type) {
case SYSFS_DIR:
/* Always have a dentry so use that */
return sd->s_dentry->d_name.name;
case SYSFS_KOBJ_ATTR:
attr = sd->s_element;
return attr->name;
case SYSFS_KOBJ_BIN_ATTR:
bin_attr = sd->s_element;
return bin_attr->attr.name;
case SYSFS_KOBJ_LINK:
sl = sd->s_element;
return sl->link_name;
}
return NULL;
}
static inline void orphan_all_buffers(struct inode *node)
{
struct sysfs_buffer_collection *set;
@@ -305,7 +274,7 @@ int sysfs_hash_and_remove(struct dentry * dir, const char * name)
list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
if (!sd->s_element)
continue;
if (!strcmp(sysfs_get_name(sd), name)) {
if (!strcmp(sd->s_name, name)) {
list_del_init(&sd->s_sibling);
sysfs_drop_dentry(sd, dir);
sysfs_put(sd);