From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>,
Mark Fasheh <mark@fasheh.com>, Joel Becker <jlbec@evilplan.org>,
Joseph Qi <joseph.qi@linux.alibaba.com>,
Evgeniy Dushistov <dushistov@mail.ru>,
"Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: ocfs2-devel@oss.oracle.com, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org
Subject: [PATCH 2/6] minix: fix error handling in minix_set_link
Date: Mon, 16 Jan 2023 09:55:19 +0100 [thread overview]
Message-ID: <20230116085523.2343176-3-hch@lst.de> (raw)
In-Reply-To: <20230116085523.2343176-1-hch@lst.de>
If minix_prepare_chunk fails, updating c/mtime and marking the
dir inode dirty is wrong, as the inode hasn't been modified. Also
propagate the error to the caller.
Note that this moves the dir_put_page call later, but that matches
other uses of this helper in the directory code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/minix/dir.c | 23 ++++++++++++-----------
fs/minix/minix.h | 3 ++-
fs/minix/namei.c | 8 +++++---
3 files changed, 19 insertions(+), 15 deletions(-)
diff --git a/fs/minix/dir.c b/fs/minix/dir.c
index a8e76284cb71ec..c9a3d520b72671 100644
--- a/fs/minix/dir.c
+++ b/fs/minix/dir.c
@@ -410,8 +410,8 @@ int minix_empty_dir(struct inode * inode)
}
/* Releases the page */
-void minix_set_link(struct minix_dir_entry *de, struct page *page,
- struct inode *inode)
+int minix_set_link(struct minix_dir_entry *de, struct page *page,
+ struct inode *inode)
{
struct inode *dir = page->mapping->host;
struct minix_sb_info *sbi = minix_sb(dir->i_sb);
@@ -420,20 +420,21 @@ void minix_set_link(struct minix_dir_entry *de, struct page *page,
int err;
lock_page(page);
-
err = minix_prepare_chunk(page, pos, sbi->s_dirsize);
- if (err == 0) {
- if (sbi->s_version == MINIX_V3)
- ((minix3_dirent *) de)->inode = inode->i_ino;
- else
- de->inode = inode->i_ino;
- err = dir_commit_chunk(page, pos, sbi->s_dirsize);
- } else {
+ if (err) {
unlock_page(page);
+ goto out_put_page;
}
- dir_put_page(page);
+ if (sbi->s_version == MINIX_V3)
+ ((minix3_dirent *)de)->inode = inode->i_ino;
+ else
+ de->inode = inode->i_ino;
+ err = dir_commit_chunk(page, pos, sbi->s_dirsize);
dir->i_mtime = dir->i_ctime = current_time(dir);
mark_inode_dirty(dir);
+out_put_page:
+ dir_put_page(page);
+ return err;
}
struct minix_dir_entry * minix_dotdot (struct inode *dir, struct page **p)
diff --git a/fs/minix/minix.h b/fs/minix/minix.h
index 20217336802570..8f7a636bd1b241 100644
--- a/fs/minix/minix.h
+++ b/fs/minix/minix.h
@@ -69,7 +69,8 @@ extern int minix_add_link(struct dentry*, struct inode*);
extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
extern int minix_make_empty(struct inode*, struct inode*);
extern int minix_empty_dir(struct inode*);
-extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
+int minix_set_link(struct minix_dir_entry *de, struct page *page,
+ struct inode *inode);
extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
extern ino_t minix_inode_by_name(struct dentry*);
diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index 8afdc408ca4fd5..82d46c28f01b01 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -223,7 +223,9 @@ static int minix_rename(struct user_namespace *mnt_userns,
new_de = minix_find_entry(new_dentry, &new_page);
if (!new_de)
goto out_dir;
- minix_set_link(new_de, new_page, old_inode);
+ err = minix_set_link(new_de, new_page, old_inode);
+ if (err)
+ goto out_dir;
new_inode->i_ctime = current_time(new_inode);
if (dir_de)
drop_nlink(new_inode);
@@ -240,10 +242,10 @@ static int minix_rename(struct user_namespace *mnt_userns,
mark_inode_dirty(old_inode);
if (dir_de) {
- minix_set_link(dir_de, dir_page, new_dir);
+ err = minix_set_link(dir_de, dir_page, new_dir);
inode_dec_link_count(old_dir);
}
- return 0;
+ return err;
out_dir:
if (dir_de) {
--
2.39.0
next prev parent reply other threads:[~2023-01-16 8:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-16 8:55 remove most callers of write_one_page Christoph Hellwig
2023-01-16 8:55 ` [PATCH 1/6] minix: fix error handling in minix_delete_entry Christoph Hellwig
2023-01-16 8:55 ` Christoph Hellwig [this message]
2023-01-16 8:55 ` [PATCH 3/6] minix: don't flush page immediately for DIRSYNC directories Christoph Hellwig
2023-01-16 8:55 ` [PATCH 4/6] sysv: " Christoph Hellwig
2023-01-16 8:55 ` [PATCH 5/6] ufs: " Christoph Hellwig
2023-01-16 8:55 ` [PATCH 6/6] ocfs2: don't use write_one_page in ocfs2_duplicate_clusters_by_page Christoph Hellwig
2023-01-16 21:02 ` remove most callers of write_one_page Al Viro
2023-01-16 21:30 ` Andrew Morton
2023-01-17 5:55 ` Christoph Hellwig
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