On Wed, Sep 17, 2014 at 5:26 PM, Chao Yu <chao2.yu@xxxxxxxxxxx> wrote:
> Both ceph_update_writeable_page and ceph_setattr will verify file size
> with max size ceph supported.
> There are two caller for ceph_update_writeable_page, ceph_write_begin and
> ceph_page_mkwrite. For ceph_write_begin, we have already verified the size in
> generic_write_checks of ceph_write_iter; for ceph_page_mkwrite, we have no
> chance to change file size when mmap. Likewise we have already verified the size
> in inode_change_ok when we call ceph_setattr.
> So let's remove the redundant code for max file size verification.
>
> Signed-off-by: Chao Yu <chao2.yu@xxxxxxxxxxx>
> ---
> fs/ceph/addr.c | 9 ---------
> fs/ceph/inode.c | 6 ------
> 2 files changed, 15 deletions(-)
>
> diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
> index 90b3954..18c06bb 100644
> --- a/fs/ceph/addr.c
> +++ b/fs/ceph/addr.c
> @@ -1076,12 +1076,6 @@ retry_locked:
> /* past end of file? */
> i_size = inode->i_size; /* caller holds i_mutex */
>
> - if (i_size + len > inode->i_sb->s_maxbytes) {
> - /* file is too big */
> - r = -EINVAL;
> - goto fail;
> - }
> -
> if (page_off >= i_size ||
> (pos_in_page == 0 && (pos+len) >= i_size &&
> end_in_page - pos_in_page != PAGE_CACHE_SIZE)) {
> @@ -1099,9 +1093,6 @@ retry_locked:
> if (r < 0)
> goto fail_nosnap;
> goto retry_locked;
> -
> -fail:
> - up_read(&mdsc->snap_rwsem);
> fail_nosnap:
> unlock_page(page);
> return r;
> diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
> index 04c89c2..25c242e 100644
> --- a/fs/ceph/inode.c
> +++ b/fs/ceph/inode.c
> @@ -1813,10 +1813,6 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr)
> if (ia_valid & ATTR_SIZE) {
> dout("setattr %p size %lld -> %lld\n", inode,
> inode->i_size, attr->ia_size);
> - if (attr->ia_size > inode->i_sb->s_maxbytes) {
> - err = -EINVAL;
> - goto out;
> - }
> if ((issued & CEPH_CAP_FILE_EXCL) &&
> attr->ia_size > inode->i_size) {
> inode->i_size = attr->ia_size;
> @@ -1896,8 +1892,6 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr)
> if (mask & CEPH_SETATTR_SIZE)
> __ceph_do_pending_vmtruncate(inode);
> return err;
> -out:
> - spin_unlock(&ci->i_ceph_lock);
> out_put:
> ceph_mdsc_put_request(req);
> return err;
> --
> 2.0.1.474.g72c7794
>
>
Reviewed-by: Yan, Zheng <zyan@xxxxxxxxxx>
I added this to testing branch of client-client.
Thanks
Yan, Zheng
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