| Message ID | a44f6666-bbc4-405e-0e6c-0f4e922eeef6@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v5] ocfs2: roll back the reference count modification of the parent directory if an error occurs | expand |
On 2020/3/17 20:28, wangjian wrote: > Under some conditions, the directory cannot be deleted. > The specific scenarios are as follows: (for example, > /mnt/ocfs2 is the mount point) > > 1. Create the /mnt/ocfs2/p_dir directory. At this time, > the i_nlink corresponding to the inode of > the /mnt/ocfs2/p_dir directory is equal to 2. > > 2. During the process of creating the > /mnt/ocfs2/p_dir/s_dir directory, if the call to the inc_nlink > function in ocfs2_mknod succeeds, the functions such as > ocfs2_init_acl, ocfs2_init_security_set, and ocfs2_dentry_attach_lock fail. > At this time, the i_nlink corresponding to the inode of the > /mnt/ocfs2/p_dir directory is equal to 3, but /mnt/ocfs2/p_dir/s_dir > is not added to the /mnt/ocfs2/p_dir directory entry. > > 3. Delete the /mnt/ocfs2/p_dir directory (rm -rf /mnt/ocfs2/p_dir). > At this time, it is found that the i_nlink corresponding to > the inode corresponding to the /mnt/ocfs2/p_dir directory is equal to 3. > Therefore, the /mnt/ocfs2/p_dir directory cannot be deleted. > > Signed-off-by: Jian wang <wangjian161@huawei.com> Reviewed-by: Jun Piao <piaojun@huawei.com>
On 2020/3/17 20:28, wangjian wrote: > Under some conditions, the directory cannot be deleted. > The specific scenarios are as follows: (for example, > /mnt/ocfs2 is the mount point) > > 1. Create the /mnt/ocfs2/p_dir directory. At this time, > the i_nlink corresponding to the inode of > the /mnt/ocfs2/p_dir directory is equal to 2. > > 2. During the process of creating the > /mnt/ocfs2/p_dir/s_dir directory, if the call to the inc_nlink > function in ocfs2_mknod succeeds, the functions such as > ocfs2_init_acl, ocfs2_init_security_set, and ocfs2_dentry_attach_lock fail. > At this time, the i_nlink corresponding to the inode of the > /mnt/ocfs2/p_dir directory is equal to 3, but /mnt/ocfs2/p_dir/s_dir > is not added to the /mnt/ocfs2/p_dir directory entry. > > 3. Delete the /mnt/ocfs2/p_dir directory (rm -rf /mnt/ocfs2/p_dir). > At this time, it is found that the i_nlink corresponding to > the inode corresponding to the /mnt/ocfs2/p_dir directory is equal to 3. > Therefore, the /mnt/ocfs2/p_dir directory cannot be deleted. > > Signed-off-by: Jian wang <wangjian161@huawei.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> > --- > ocfs2/namei.c | 15 +++++++++++---- > 1 file changed, 11 insertions(+), 4 deletions(-) > > diff --git a/ocfs2/namei.c b/ocfs2/namei.c > index 8ea51cf..eaecab1 100644 > --- a/ocfs2/namei.c > +++ b/ocfs2/namei.c > @@ -406,7 +406,7 @@ static int ocfs2_mknod(struct inode *dir, > > if (status < 0) { > mlog_errno(status); > - goto leave; > + goto roll_back; > } > > if (si.enable) { > @@ -414,7 +414,7 @@ static int ocfs2_mknod(struct inode *dir, > meta_ac, data_ac); > if (status < 0) { > mlog_errno(status); > - goto leave; > + goto roll_back; > } > } > > @@ -427,7 +427,7 @@ static int ocfs2_mknod(struct inode *dir, > OCFS2_I(dir)->ip_blkno); > if (status) { > mlog_errno(status); > - goto leave; > + goto roll_back; > } > > dl = dentry->d_fsdata; > @@ -437,12 +437,19 @@ static int ocfs2_mknod(struct inode *dir, > &lookup); > if (status < 0) { > mlog_errno(status); > - goto leave; > + goto roll_back; > } > > insert_inode_hash(inode); > d_instantiate(dentry, inode); > status = 0; > + > +roll_back: > + if (status < 0 && S_ISDIR(mode)) { > + ocfs2_add_links_count(dirfe, -1); > + drop_nlink(dir); > + } > + > leave: > if (status < 0 && did_quota_inode) > dquot_free_inode(inode);
diff --git a/ocfs2/namei.c b/ocfs2/namei.c index 8ea51cf..eaecab1 100644 --- a/ocfs2/namei.c +++ b/ocfs2/namei.c @@ -406,7 +406,7 @@ static int ocfs2_mknod(struct inode *dir, if (status < 0) { mlog_errno(status); - goto leave; + goto roll_back; } if (si.enable) { @@ -414,7 +414,7 @@ static int ocfs2_mknod(struct inode *dir, meta_ac, data_ac); if (status < 0) { mlog_errno(status); - goto leave; + goto roll_back; } } @@ -427,7 +427,7 @@ static int ocfs2_mknod(struct inode *dir, OCFS2_I(dir)->ip_blkno); if (status) { mlog_errno(status); - goto leave; + goto roll_back; } dl = dentry->d_fsdata; @@ -437,12 +437,19 @@ static int ocfs2_mknod(struct inode *dir, &lookup); if (status < 0) { mlog_errno(status); - goto leave; + goto roll_back; } insert_inode_hash(inode); d_instantiate(dentry, inode); status = 0; + +roll_back: + if (status < 0 && S_ISDIR(mode)) { + ocfs2_add_links_count(dirfe, -1); + drop_nlink(dir); + } + leave: if (status < 0 && did_quota_inode) dquot_free_inode(inode);
Under some conditions, the directory cannot be deleted. The specific scenarios are as follows: (for example, /mnt/ocfs2 is the mount point) 1. Create the /mnt/ocfs2/p_dir directory. At this time, the i_nlink corresponding to the inode of the /mnt/ocfs2/p_dir directory is equal to 2. 2. During the process of creating the /mnt/ocfs2/p_dir/s_dir directory, if the call to the inc_nlink function in ocfs2_mknod succeeds, the functions such as ocfs2_init_acl, ocfs2_init_security_set, and ocfs2_dentry_attach_lock fail. At this time, the i_nlink corresponding to the inode of the /mnt/ocfs2/p_dir directory is equal to 3, but /mnt/ocfs2/p_dir/s_dir is not added to the /mnt/ocfs2/p_dir directory entry. 3. Delete the /mnt/ocfs2/p_dir directory (rm -rf /mnt/ocfs2/p_dir). At this time, it is found that the i_nlink corresponding to the inode corresponding to the /mnt/ocfs2/p_dir directory is equal to 3. Therefore, the /mnt/ocfs2/p_dir directory cannot be deleted. Signed-off-by: Jian wang <wangjian161@huawei.com> --- ocfs2/namei.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)