aboutsummaryrefslogtreecommitdiff
path: root/fs/9p/vfs_dentry.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/9p/vfs_dentry.c')
-rw-r--r--fs/9p/vfs_dentry.c45
1 files changed, 8 insertions, 37 deletions
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index 2dd806dac9f..12c9cc926b7 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -43,47 +43,18 @@
#include "fid.h"
/**
- * v9fs_dentry_validate - VFS dcache hook to validate cache
- * @dentry: dentry that is being validated
- * @nd: path data
+ * v9fs_dentry_delete - called when dentry refcount equals 0
+ * @dentry: dentry in question
*
- * dcache really shouldn't be used for 9P2000 as at all due to
- * potential attached semantics to directory traversal (walk).
- *
- * FUTURE: look into how to use dcache to allow multi-stage
- * walks in Plan 9 & potential for better dcache operation which
- * would remain valid for Plan 9 semantics. Older versions
- * had validation via stat for those interested. However, since
- * stat has the same approximate overhead as walk there really
- * is no difference. The only improvement would be from a
- * time-decay cache like NFS has and that undermines the
- * synchronous nature of 9P2000.
+ * By returning 1 here we should remove cacheing of unused
+ * dentry components.
*
*/
-static int v9fs_dentry_validate(struct dentry *dentry, struct nameidata *nd)
+int v9fs_dentry_delete(struct dentry *dentry)
{
- struct dentry *dc = current->fs->pwd;
-
- dprintk(DEBUG_VFS, "dentry: %s (%p)\n", dentry->d_iname, dentry);
- if (v9fs_fid_lookup(dentry)) {
- dprintk(DEBUG_VFS, "VALID\n");
- return 1;
- }
-
- while (dc != NULL) {
- if (dc == dentry) {
- dprintk(DEBUG_VFS, "VALID\n");
- return 1;
- }
- if (dc == dc->d_parent)
- break;
-
- dc = dc->d_parent;
- }
-
- dprintk(DEBUG_VFS, "INVALID\n");
- return 0;
+ dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+ return 1;
}
/**
@@ -118,6 +89,6 @@ void v9fs_dentry_release(struct dentry *dentry)
}
struct dentry_operations v9fs_dentry_operations = {
- .d_revalidate = v9fs_dentry_validate,
+ .d_delete = v9fs_dentry_delete,
.d_release = v9fs_dentry_release,
};