Re: [PATCH] nfs: emit a fsnotify_nameremove call in sillyrename codepath

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On Mar 13, 2014, at 15:24, Jeff Layton <jlayton@xxxxxxxxxx> wrote:

> If a file is sillyrenamed, then the generic vfs_unlink code will skip
> emitting fsnotify events for it.
> 
> This patch has the sillyrename code do that instead.
> 
> In truth this is a little bit odd since we aren't actually removing the
> dentry per-se, but renaming it. Still, this is probably the right thing
> to do since it's what userland apps expect to see when an unlink()
> occurs or some file is renamed on top of the dentry.
> 
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---
> fs/nfs/dir.c    | 1 +
> fs/nfs/unlink.c | 2 ++
> 2 files changed, 3 insertions(+)
> 
> diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
> index 4a48fe4b84b6..591aec9b1719 100644
> --- a/fs/nfs/dir.c
> +++ b/fs/nfs/dir.c
> @@ -37,6 +37,7 @@
> #include <linux/sched.h>
> #include <linux/kmemleak.h>
> #include <linux/xattr.h>
> +#include <linux/fsnotify.h>
> 
> #include "delegation.h"
> #include "iostat.h"
> diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
> index 11d78944de79..547ed0cd59db 100644
> --- a/fs/nfs/unlink.c
> +++ b/fs/nfs/unlink.c
> @@ -355,6 +355,8 @@ static void nfs_async_rename_done(struct rpc_task *task, void *calldata)
> 
> 	if (task->tk_status != 0)
> 		nfs_cancel_async_unlink(old_dentry);
> +	else if (old_dentry->d_flags & DCACHE_NFSFS_RENAMED)
> +		fsnotify_nameremove(old_dentry, S_ISDIR(old_dentry->d_inode->i_mode));
> }

Any reason why we shouldn’t just do this in nfs_sillyrename() itself?
_________________________________
Trond Myklebust
Linux NFS client maintainer, PrimaryData
trond.myklebust@xxxxxxxxxxxxxxx

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