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    Subject[PATCH v5 13/19] vfs: make do_unlinkat retry on ESTALE errors
    Date
    Signed-off-by: Jeff Layton <jlayton@redhat.com>
    ---
    fs/namei.c | 12 +++++++++++-
    1 file changed, 11 insertions(+), 1 deletion(-)

    diff --git a/fs/namei.c b/fs/namei.c
    index 7eb59cc..0c112c3 100644
    --- a/fs/namei.c
    +++ b/fs/namei.c
    @@ -3392,8 +3392,14 @@ static long do_unlinkat(int dfd, const char __user *pathname)
    struct dentry *dentry;
    struct nameidata nd;
    struct inode *inode = NULL;
    + unsigned int try = 0;
    + unsigned int lookup_flags = LOOKUP_PARENT;

    - error = user_path_parent(dfd, pathname, &nd, &name);
    + name = getname(pathname);
    + if (IS_ERR(name))
    + return PTR_ERR(name);
    +retry:
    + error = do_path_lookup(dfd, name, lookup_flags, &nd);
    if (error)
    return error;

    @@ -3430,6 +3436,10 @@ exit2:
    mnt_drop_write(nd.path.mnt);
    exit1:
    path_put(&nd.path);
    + if (retry_estale(error, try++)) {
    + lookup_flags |= LOOKUP_REVAL;
    + goto retry;
    + }
    putname(name);
    return error;

    --
    1.7.11.2


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