[lkml]   [2014]   [Feb]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH 01/11] vfs: Document the effect of d_revalidate on d_find_alias

d_drop or check_submounts_and_drop called from d_revalidate can result
in renamed directories with child dentries being unhashed. These
renamed and drop directory dentries can be rehashed after
d_materialise_unique uses d_find_alias to find them.

Signed-off-by: "Eric W. Biederman" <>
fs/dcache.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/dcache.c b/fs/dcache.c
index 265e0ce9769c..c71c86f7780e 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -726,7 +726,8 @@ EXPORT_SYMBOL(dget_parent);
* acquire the reference to alias and return it. Otherwise return NULL.
* Notice that if inode is a directory there can be only one alias and
* it can be unhashed only if it has no children, or if it is the root
- * of a filesystem.
+ * of a filesystem, or if the directory was renamed and d_revalidate
+ * was the first vfs operation to notice.
* If the inode has an IS_ROOT, DCACHE_DISCONNECTED alias, then prefer
* any other hashed alias over that one unless @want_discon is set,

 \ /
  Last update: 2014-02-15 23:21    [W:0.561 / U:30.556 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site