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sysfs: make directory dentries and inodes reclaimable

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This patch makes dentries and inodes for sysfs directories
reclaimable.

* sysfs_notify() is modified to walk sysfs_dirent tree instead of
  dentry tree.

* sysfs_update_file() and sysfs_chmod_file() use sysfs_get_dentry() to
  grab the victim dentry.

* sysfs_rename_dir() and sysfs_move_dir() grab all dentries using
  sysfs_get_dentry() on startup.

* Dentries for all shadowed directories are pinned in memory to serve
  as lookup start point.

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 04:27:25 +09:00
committed by Greg Kroah-Hartman
parent 53e0ae9269
commit 51225039f3
5 changed files with 184 additions and 179 deletions
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fs/sysfs/mount.c
+1 -1
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@@ -24,7 +24,7 @@ static const struct super_operations sysfs_ops = {
.drop_inode = sysfs_delete_inode,
};
static struct sysfs_dirent sysfs_root = {
struct sysfs_dirent sysfs_root = {
.s_count = ATOMIC_INIT(1),
.s_flags = SYSFS_ROOT,
.s_mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,