From: Christoph Hellwig <hch@lst.de>
To: Christian Brauner <brauner@kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>
Cc: Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Reinette Chatre <reinette.chatre@intel.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>,
Tejun Heo <tj@kernel.org>,
Trond Myklebust <trond.myklebust@hammerspace.com>,
Anna Schumaker <anna@kernel.org>,
Kees Cook <keescook@chromium.org>,
Damien Le Moal <dlemoal@kernel.org>,
Naohiro Aota <naohiro.aota@wdc.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org,
linux-nfs@vger.kernel.org, linux-hardening@vger.kernel.org,
cgroups@vger.kernel.org
Subject: [PATCH 07/19] hypfs: use d_genocide to kill fs entries
Date: Wed, 13 Sep 2023 08:10:01 -0300 [thread overview]
Message-ID: <20230913111013.77623-8-hch@lst.de> (raw)
In-Reply-To: <20230913111013.77623-1-hch@lst.de>
hypfs is entirely synthetic and doesn't care about i_nlink when dropping
entries from the cache. Switch to d_genocide instead of a home grown
file remove loop for unmount and write (yes, really!).
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/s390/hypfs/inode.c | 37 ++-----------------------------------
1 file changed, 2 insertions(+), 35 deletions(-)
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index dbe8a7dcafa922..3261fb9cade648 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -64,33 +64,6 @@ static void hypfs_add_dentry(struct dentry *dentry)
hypfs_last_dentry = dentry;
}
-static void hypfs_remove(struct dentry *dentry)
-{
- struct dentry *parent;
-
- parent = dentry->d_parent;
- inode_lock(d_inode(parent));
- if (simple_positive(dentry)) {
- if (d_is_dir(dentry))
- simple_rmdir(d_inode(parent), dentry);
- else
- simple_unlink(d_inode(parent), dentry);
- }
- d_drop(dentry);
- dput(dentry);
- inode_unlock(d_inode(parent));
-}
-
-static void hypfs_delete_tree(struct dentry *root)
-{
- while (hypfs_last_dentry) {
- struct dentry *next_dentry;
- next_dentry = hypfs_last_dentry->d_fsdata;
- hypfs_remove(hypfs_last_dentry);
- hypfs_last_dentry = next_dentry;
- }
-}
-
static struct inode *hypfs_make_inode(struct super_block *sb, umode_t mode)
{
struct inode *ret = new_inode(sb);
@@ -183,14 +156,14 @@ static ssize_t hypfs_write_iter(struct kiocb *iocb, struct iov_iter *from)
rc = -EBUSY;
goto out;
}
- hypfs_delete_tree(sb->s_root);
+ d_genocide(sb->s_root);
if (MACHINE_IS_VM)
rc = hypfs_vm_create_files(sb->s_root);
else
rc = hypfs_diag_create_files(sb->s_root);
if (rc) {
pr_err("Updating the hypfs tree failed\n");
- hypfs_delete_tree(sb->s_root);
+ d_genocide(sb->s_root);
goto out;
}
hypfs_update_update(sb);
@@ -323,12 +296,6 @@ static int hypfs_init_fs_context(struct fs_context *fc)
static void hypfs_kill_super(struct super_block *sb)
{
- struct hypfs_sb_info *sb_info = sb->s_fs_info;
-
- if (sb->s_root)
- hypfs_delete_tree(sb->s_root);
- if (sb_info && sb_info->update_file)
- hypfs_remove(sb_info->update_file);
kill_litter_super(sb);
kfree(sb->s_fs_info);
}
--
2.39.2
next prev parent reply other threads:[~2023-09-13 11:11 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-13 11:09 split up ->kill_sb Christoph Hellwig
2023-09-13 11:09 ` [PATCH 01/19] fs: reflow deactivate_locked_super Christoph Hellwig
2023-09-13 16:35 ` Christian Brauner
2023-09-26 9:24 ` Christoph Hellwig
2023-09-13 11:09 ` [PATCH 02/19] fs: make ->kill_sb optional Christoph Hellwig
2023-09-13 11:09 ` [PATCH 03/19] fs: release anon dev_t in deactivate_locked_super Christoph Hellwig
2023-09-13 23:27 ` Al Viro
2023-09-14 2:37 ` Al Viro
2023-09-14 5:38 ` Al Viro
2023-09-14 7:56 ` Christian Brauner
2023-09-26 9:31 ` Christoph Hellwig
2023-09-14 14:02 ` Christian Brauner
2023-09-14 16:58 ` Al Viro
2023-09-14 19:23 ` Al Viro
2023-09-15 7:40 ` Christian Brauner
2023-09-15 9:44 ` Christian Brauner
2023-09-15 14:12 ` Christian Brauner
2023-09-15 14:28 ` Al Viro
2023-09-15 14:33 ` Al Viro
2023-09-15 14:40 ` Christian Brauner
2023-09-26 9:41 ` Christoph Hellwig
2023-09-26 9:38 ` Christoph Hellwig
2023-09-26 21:25 ` Al Viro
2023-09-27 22:29 ` Al Viro
2023-10-02 6:46 ` Christoph Hellwig
2023-10-09 21:57 ` Al Viro
2023-10-10 8:44 ` Christian Brauner
2023-10-17 19:50 ` Al Viro
2023-09-13 11:09 ` [PATCH 04/19] NFS: remove the s_dev field from struct nfs_server Christoph Hellwig
2023-09-13 11:09 ` [PATCH 05/19] fs: assign an anon dev_t in common code Christoph Hellwig
2023-09-14 0:34 ` Al Viro
2023-09-13 11:10 ` [PATCH 06/19] qibfs: use simple_release_fs Christoph Hellwig
2023-09-18 11:41 ` Leon Romanovsky
2023-09-13 11:10 ` Christoph Hellwig [this message]
2023-09-13 11:10 ` [PATCH 08/19] pstore: shrink the pstore_sb_lock critical section in pstore_kill_sb Christoph Hellwig
2023-09-13 22:07 ` Kees Cook
2023-09-13 11:10 ` [PATCH 09/19] zonefs: remove duplicate cleanup in zonefs_fill_super Christoph Hellwig
2023-09-14 0:33 ` Damien Le Moal
2023-09-14 0:49 ` Al Viro
2023-09-13 11:10 ` [PATCH 10/19] USB: gadget/legacy: remove sb_mutex Christoph Hellwig
2023-09-13 16:10 ` Alan Stern
2023-09-26 9:24 ` Christoph Hellwig
2023-09-14 10:22 ` Sergey Shtylyov
2023-09-13 11:10 ` [PATCH 11/19] fs: add new shutdown_sb and free_sb methods Christoph Hellwig
2023-09-14 2:07 ` Al Viro
2023-09-13 11:10 ` [PATCH 12/19] fs: convert kill_litter_super to litter_shutdown_sb Christoph Hellwig
2023-09-13 22:07 ` Kees Cook
2023-09-13 11:10 ` [PATCH 13/19] fs: convert kill_block_super to block_free_sb Christoph Hellwig
2023-09-14 2:29 ` Al Viro
2023-09-13 11:10 ` [PATCH 14/19] jffs2: convert to ->shutdown_sb and ->free_sb Christoph Hellwig
2023-09-13 11:10 ` [PATCH 15/19] kernfs: split ->kill_sb Christoph Hellwig
2023-09-18 15:24 ` Michal Koutný
2023-09-13 11:10 ` [PATCH 16/19] x86/resctrl: release rdtgroup_mutex and the CPU hotplug lock in rdt_shutdown_sb Christoph Hellwig
2023-09-13 11:10 ` [PATCH 17/19] NFS: move nfs_kill_super to fs_context.c Christoph Hellwig
2023-09-13 11:10 ` [PATCH 18/19] fs: simple ->shutdown_sb and ->free_sb conversions Christoph Hellwig
2023-09-13 11:10 ` [PATCH 19/19] fs: remove ->kill_sb Christoph Hellwig
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