From patchwork Fri Mar 15 16:52:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 13593714 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 63E6054910; Fri, 15 Mar 2024 16:53:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710521603; cv=none; b=dRK7DH+NSso+NTORJZqEFSXRoXm/wBiiNrZn9a+VpIno0YtvITrqnpT9oEZ7iKBYyCo6hXUw7k5N/Nubq+dwGOQS38ih+fnDYZdEfhOtbv7XoOeUyOJpFClm4KSmkpha+PloQYMEHVzDxrKMtSBYXJJ8dJv84OA+qH5yd7O7gew= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710521603; c=relaxed/simple; bh=4Hh6J09N40Wh6o7Y7XvcqF+EG8cxj/8qFYbo024OMkU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=GtFK1KUu+wsCOpUBimT7F48cu1xhiHOVDXV5HNdetKVJWALxr96IaNlFcxCq2uG3DmTJOdbxK1+VLl08vHqs1jRJK4xP2fP1AHPHAGHO23gc265pTgc95638DrSl4Q/Oa4VfHhu282jnGOgs67sEoJwO6xj8bl1kM8uQ2fJsgTM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ode0hfFu; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ode0hfFu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1351DC43609; Fri, 15 Mar 2024 16:53:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710521603; bh=4Hh6J09N40Wh6o7Y7XvcqF+EG8cxj/8qFYbo024OMkU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=ode0hfFu6Gg9RHfhivzCeASVGZsOe/RdUmf1C493jkcyVJGUDp0hzALLCup4zs3tx hWWSZOheFCmuPgxgTJ1sb9DU5YfYfL6GOi7Ywr0tH3M+03imNCNwBPkbzO5mujObcP 21HALFvYvdm1eusUYjhfR+V8Tp9r6DgU3Z14qYk9XNiLxZJhV6T5/a2f6+/4oMrD62 rljvNgtBN4p9w4n/bXLKF/eD66NIGAya0zP3I5WKhVoEZ6+MtjEJ1UpvOb23avBTM2 /Xqri7PfTXUZZIl6teaGZpK1sB0tfrtGk7ItxbkkmdUvCMkt0l15ivwfxrYUQ9+AuA 3jTo44hNLi4xw== From: Jeff Layton Date: Fri, 15 Mar 2024 12:52:56 -0400 Subject: [PATCH RFC 05/24] vfs: allow rmdir to wait for delegation break on parent Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240315-dir-deleg-v1-5-a1d6209a3654@kernel.org> References: <20240315-dir-deleg-v1-0-a1d6209a3654@kernel.org> In-Reply-To: <20240315-dir-deleg-v1-0-a1d6209a3654@kernel.org> To: Alexander Viro , Christian Brauner , Jan Kara , Chuck Lever , Alexander Aring , Trond Myklebust , Anna Schumaker , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Greg Kroah-Hartman , "Rafael J. Wysocki" , David Howells , Tyler Hicks , Neil Brown , Olga Kornievskaia , Dai Ngo , Miklos Szeredi , Amir Goldstein , Namjae Jeon , Sergey Senozhatsky , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, netfs@lists.linux.dev, ecryptfs@vger.kernel.org, linux-unionfs@vger.kernel.org, netdev@vger.kernel.org, Jeff Layton X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=7032; i=jlayton@kernel.org; h=from:subject:message-id; bh=4Hh6J09N40Wh6o7Y7XvcqF+EG8cxj/8qFYbo024OMkU=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBl9Hzt9k6/585HV65ukYqnWWqAbMCrWWWQNmCTg kTMzxFXcRiJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZfR87QAKCRAADmhBGVaC FUIKD/9z8JZIU07s513G0XxxneuCrd9u7hEEB1Mib4EnmqFq5ThTbEwUs5mCIte9khpQ/5NArX/ 3wzTpaF7+Om8T074fwYQaVKp0YsOP5BtipNh71epmC0lE7WjJHhcDoRt1sJtd7inaWWKXr0TmoD 8x28NBfcvENlifSpkvC6PVPRCMRZZbmCAh5XhVSE7CcfEFJunhNywWO/QKoDxibi2guxymBnLHk Ra4Mv6zj1IhqAORmYpc36R5/hp2qxCzsgp3b3XzzPXKFO8YMjZecAbB/+PvbbNR0SuaOx+kcEYz ylqsJq4lhL9wULmtcXGSREKC7P1mJzyZGyYBU6LeBSFjVgXWOG6K3ert+g0teM7CABspgJVy9le VfDF+seu6N2LLDd+sAUwH+7VpOxsx/DQOPuHY5WYZ/vrZpXlDAkObTVCVITW6hmd/cOzNs+Ksi8 VhYfjl8Vk+NHHQ5ijsnmloBGNy8KPUq73ZZTcjXqbz+fKAG/7fto81A7xt1uYrahVywY/Bp17m6 jmCNMf0N1KRcOvU6I/q/pvQ4PKGxMIvMj1rODVeyWauRMJbonrWX9Or6f13QDO6F35zIF/4NEIW wlFzRF5hF9Z6/a6/cvvX9Nkx1pzVqzicrkynMwudYWJ7Lxgjmq+xwIhaFoQ/F2URj2vdcIn/9g9 dvaoqH0SMWfYEZQ== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 X-Patchwork-State: RFC In order to add directory delegation support, we need to break delegations on the parent whenever there is going to be a change in the directory. Add a new delegated_inode parameter to vfs_rmdir. Most callers will set that to NULL, but do_rmdir can use that to wait for the delegation break to complete and then retry. Signed-off-by: Jeff Layton --- drivers/base/devtmpfs.c | 2 +- fs/ecryptfs/inode.c | 2 +- fs/namei.c | 16 ++++++++++++++-- fs/nfsd/nfs4recover.c | 4 ++-- fs/nfsd/vfs.c | 2 +- fs/overlayfs/overlayfs.h | 2 +- fs/smb/server/vfs.c | 4 ++-- include/linux/fs.h | 3 ++- 8 files changed, 24 insertions(+), 11 deletions(-) diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c index 8d1dbcad69f7..c00126796f79 100644 --- a/drivers/base/devtmpfs.c +++ b/drivers/base/devtmpfs.c @@ -248,7 +248,7 @@ static int dev_rmdir(const char *name) if (d_really_is_positive(dentry)) { if (d_inode(dentry)->i_private == &thread) err = vfs_rmdir(&nop_mnt_idmap, d_inode(parent.dentry), - dentry); + dentry, NULL); else err = -EPERM; } else { diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index d26b4484fa60..3d0cddbf037c 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -541,7 +541,7 @@ static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry) if (d_unhashed(lower_dentry)) rc = -EINVAL; else - rc = vfs_rmdir(&nop_mnt_idmap, lower_dir, lower_dentry); + rc = vfs_rmdir(&nop_mnt_idmap, lower_dir, lower_dentry, NULL); } if (!rc) { clear_nlink(d_inode(dentry)); diff --git a/fs/namei.c b/fs/namei.c index 6a22517f9938..f00d8d708001 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -4183,6 +4183,7 @@ SYSCALL_DEFINE2(mkdir, const char __user *, pathname, umode_t, mode) * @idmap: idmap of the mount the inode was found from * @dir: inode of @dentry * @dentry: pointer to dentry of the base directory + * @delegated_inode: return pointer for delegated inode * * Remove a directory. * @@ -4193,7 +4194,7 @@ SYSCALL_DEFINE2(mkdir, const char __user *, pathname, umode_t, mode) * raw inode simply pass @nop_mnt_idmap. */ int vfs_rmdir(struct mnt_idmap *idmap, struct inode *dir, - struct dentry *dentry) + struct dentry *dentry, struct inode **delegated_inode) { int error = may_delete(idmap, dir, dentry, 1); @@ -4215,6 +4216,10 @@ int vfs_rmdir(struct mnt_idmap *idmap, struct inode *dir, if (error) goto out; + error = try_break_deleg(dir, delegated_inode); + if (error) + goto out; + error = dir->i_op->rmdir(dir, dentry); if (error) goto out; @@ -4241,6 +4246,7 @@ int do_rmdir(int dfd, struct filename *name) struct qstr last; int type; unsigned int lookup_flags = 0; + struct inode *delegated_inode = NULL; retry: error = filename_parentat(dfd, name, lookup_flags, &path, &last, &type); if (error) @@ -4274,7 +4280,8 @@ int do_rmdir(int dfd, struct filename *name) error = security_path_rmdir(&path, dentry); if (error) goto exit4; - error = vfs_rmdir(mnt_idmap(path.mnt), path.dentry->d_inode, dentry); + error = vfs_rmdir(mnt_idmap(path.mnt), path.dentry->d_inode, + dentry, &delegated_inode); exit4: dput(dentry); exit3: @@ -4282,6 +4289,11 @@ int do_rmdir(int dfd, struct filename *name) mnt_drop_write(path.mnt); exit2: path_put(&path); + if (delegated_inode) { + error = break_deleg_wait(&delegated_inode); + if (!error) + goto retry; + } if (retry_estale(error, lookup_flags)) { lookup_flags |= LOOKUP_REVAL; goto retry; diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index 5bfced783a70..0e82f79471cf 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -354,7 +354,7 @@ nfsd4_unlink_clid_dir(char *name, int namlen, struct nfsd_net *nn) status = -ENOENT; if (d_really_is_negative(dentry)) goto out; - status = vfs_rmdir(&nop_mnt_idmap, d_inode(dir), dentry); + status = vfs_rmdir(&nop_mnt_idmap, d_inode(dir), dentry, NULL); out: dput(dentry); out_unlock: @@ -444,7 +444,7 @@ purge_old(struct dentry *parent, struct dentry *child, struct nfsd_net *nn) if (nfs4_has_reclaimed_state(name, nn)) goto out_free; - status = vfs_rmdir(&nop_mnt_idmap, d_inode(parent), child); + status = vfs_rmdir(&nop_mnt_idmap, d_inode(parent), child, NULL); if (status) printk("failed to remove client recovery directory %pd\n", child); diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index e42e58825590..34cc2d1a4944 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -2003,7 +2003,7 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, break; } } else { - host_err = vfs_rmdir(&nop_mnt_idmap, dirp, rdentry); + host_err = vfs_rmdir(&nop_mnt_idmap, dirp, rdentry, NULL); } fh_fill_post_attrs(fhp); diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index baa371947f86..5b1f56294c4d 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -203,7 +203,7 @@ static inline int ovl_do_notify_change(struct ovl_fs *ofs, static inline int ovl_do_rmdir(struct ovl_fs *ofs, struct inode *dir, struct dentry *dentry) { - int err = vfs_rmdir(ovl_upper_mnt_idmap(ofs), dir, dentry); + int err = vfs_rmdir(ovl_upper_mnt_idmap(ofs), dir, dentry, NULL); pr_debug("rmdir(%pd2) = %i\n", dentry, err); return err; diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c index 3760e0dda349..5b4e5876c2ac 100644 --- a/fs/smb/server/vfs.c +++ b/fs/smb/server/vfs.c @@ -611,7 +611,7 @@ int ksmbd_vfs_remove_file(struct ksmbd_work *work, const struct path *path) idmap = mnt_idmap(path->mnt); if (S_ISDIR(d_inode(path->dentry)->i_mode)) { - err = vfs_rmdir(idmap, d_inode(parent), path->dentry); + err = vfs_rmdir(idmap, d_inode(parent), path->dentry, NULL); if (err && err != -ENOTEMPTY) ksmbd_debug(VFS, "rmdir failed, err %d\n", err); } else { @@ -1084,7 +1084,7 @@ int ksmbd_vfs_unlink(struct file *filp) dget(dentry); if (S_ISDIR(d_inode(dentry)->i_mode)) - err = vfs_rmdir(idmap, d_inode(dir), dentry); + err = vfs_rmdir(idmap, d_inode(dir), dentry, NULL); else err = vfs_unlink(idmap, d_inode(dir), dentry, NULL); diff --git a/include/linux/fs.h b/include/linux/fs.h index 18eb7d628290..e72c825476de 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1846,7 +1846,8 @@ int vfs_symlink(struct mnt_idmap *, struct inode *, struct dentry *, const char *); int vfs_link(struct dentry *, struct mnt_idmap *, struct inode *, struct dentry *, struct inode **); -int vfs_rmdir(struct mnt_idmap *, struct inode *, struct dentry *); +int vfs_rmdir(struct mnt_idmap *, struct inode *, struct dentry *, + struct inode **); int vfs_unlink(struct mnt_idmap *, struct inode *, struct dentry *, struct inode **);