From: Erez Zadok <ezk@xxxxxxxxxxxxx>
A user-specified get_nlinks may depend on other inode attributes.
Cc: Michael Halcrow <mhalcrow@xxxxxxxxxx>
Signed-off-by: Erez Zadok <ezk@xxxxxxxxxxxxx>
Signed-off-by: Josef 'Jeff' Sipek <jsipek@xxxxxxxxxxxxx>
---
fs/stack.c | 14 +++++++++-----
1 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/fs/stack.c b/fs/stack.c
index 8ffb880..67716f6 100644
--- a/fs/stack.c
+++ b/fs/stack.c
@@ -20,11 +20,6 @@ EXPORT_SYMBOL_GPL(fsstack_copy_inode_size);
void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
int (*get_nlinks)(struct inode *))
{
- if (!get_nlinks)
- dest->i_nlink = src->i_nlink;
- else
- dest->i_nlink = (*get_nlinks)(dest);
-
dest->i_mode = src->i_mode;
dest->i_uid = src->i_uid;
dest->i_gid = src->i_gid;
@@ -34,5 +29,14 @@ void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
dest->i_ctime = src->i_ctime;
dest->i_blkbits = src->i_blkbits;
dest->i_flags = src->i_flags;
+
+ /*
+ * Update the nlinks AFTER updating the above fields, because the
+ * get_links callback may depend on them.
+ */
+ if (!get_nlinks)
+ dest->i_nlink = src->i_nlink;
+ else
+ dest->i_nlink = (*get_nlinks)(dest);
}
EXPORT_SYMBOL_GPL(fsstack_copy_attr_all);
--
1.5.0.19.gddff
-
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