[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Thu, 8 Jul 2010 02:48:59 +1000
From: Nick Piggin <npiggin@...e.de>
To: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc: hch@...radead.org, viro@...iv.linux.org.uk, adilger@....com,
corbet@....net, serue@...ibm.com, neilb@...e.de,
hooanon05@...oo.co.jp, bfields@...ldses.org,
linux-fsdevel@...r.kernel.org, sfrench@...ibm.com,
philippe.deniel@....FR, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -V14 04/11] vfs: Allow handle based open on symlinks
On Tue, Jun 15, 2010 at 10:42:54PM +0530, Aneesh Kumar K.V wrote:
> The patch update may_open to allow handle based open on symlinks.
> The file handle based API use file descritor returned from open_by_handle_at
> to do different file system operations. To find the link target name we
> need to get a file descriptor on symlinks.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
> ---
> fs/namei.c | 17 ++++++++++++++---
> 1 files changed, 14 insertions(+), 3 deletions(-)
>
> diff --git a/fs/namei.c b/fs/namei.c
> index c2d19c7..417bf53 100644
> --- a/fs/namei.c
> +++ b/fs/namei.c
> @@ -1422,7 +1422,7 @@ int vfs_create(struct inode *dir, struct dentry *dentry, int mode,
> return error;
> }
>
> -int may_open(struct path *path, int acc_mode, int flag)
> +static int __may_open(struct path *path, int acc_mode, int flag, int handle)
> {
> struct dentry *dentry = path->dentry;
> struct inode *inode = dentry->d_inode;
> @@ -1433,7 +1433,13 @@ int may_open(struct path *path, int acc_mode, int flag)
>
> switch (inode->i_mode & S_IFMT) {
> case S_IFLNK:
> - return -ELOOP;
> + /*
> + * For file handle based open we should allow
> + * open of symlink.
> + */
> + if (!handle)
> + return -ELOOP;
> + break;
> case S_IFDIR:
> if (acc_mode & MAY_WRITE)
> return -EISDIR;
> @@ -1473,6 +1479,11 @@ int may_open(struct path *path, int acc_mode, int flag)
> return break_lease(inode, flag);
> }
>
> +int may_open(struct path *path, int acc_mode, int flag)
> +{
> + return __may_open(path, acc_mode, flag, 0);
> +}
Why don't you just add MAY_OPEN_LNK instead of this ugliness?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists