Re: [PATCH] dquot_initialize() can now return error. Handle it where possible

[Jan Kara <jack@suse.cz>]

On Wed 15-07-15 13:53:19, Dave Kleikamp wrote:
> Slightly modified by Dave Kleikamp due to needed jfs_rename() error path fix.
> 
> Signed-off-by: Jan Kara <jack@suse.com>
> Reviewed-by: Dave Kleikamp <dave.kleikamp@oracle.com>

Thanks! I have picked up both patches for now so that I have the series
consistent. I will wait for a few days before pushing my series to
linux-next so that your patch has time to reach Linus and I don't
create unnecessary conflicts...

								Honza

> ---
>  fs/jfs/file.c      |  7 +++++--
>  fs/jfs/jfs_inode.c |  4 +++-
>  fs/jfs/namei.c     | 54 ++++++++++++++++++++++++++++++++++++++++--------------
>  3 files changed, 48 insertions(+), 17 deletions(-)
> 
> diff --git a/fs/jfs/file.c b/fs/jfs/file.c
> index e98d39d..34ad63ea0 100644
> --- a/fs/jfs/file.c
> +++ b/fs/jfs/file.c
> @@ -107,8 +107,11 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
>  	if (rc)
>  		return rc;
>  
> -	if (is_quota_modification(inode, iattr))
> -		dquot_initialize(inode);
> +	if (is_quota_modification(inode, iattr)) {
> +		rc = dquot_initialize(inode);
> +		if (rc)
> +			return rc;
> +	}
>  	if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
>  	    (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
>  		rc = dquot_transfer(inode, iattr);
> diff --git a/fs/jfs/jfs_inode.c b/fs/jfs/jfs_inode.c
> index 6b0f816..cf7936f 100644
> --- a/fs/jfs/jfs_inode.c
> +++ b/fs/jfs/jfs_inode.c
> @@ -109,7 +109,9 @@ struct inode *ialloc(struct inode *parent, umode_t mode)
>  	/*
>  	 * Allocate inode to quota.
>  	 */
> -	dquot_initialize(inode);
> +	rc = dquot_initialize(inode);
> +	if (rc)
> +		goto fail_drop;
>  	rc = dquot_alloc_inode(inode);
>  	if (rc)
>  		goto fail_drop;
> diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
> index a5ac97b..35976bd 100644
> --- a/fs/jfs/namei.c
> +++ b/fs/jfs/namei.c
> @@ -86,7 +86,9 @@ static int jfs_create(struct inode *dip, struct dentry *dentry, umode_t mode,
>  
>  	jfs_info("jfs_create: dip:0x%p name:%pd", dip, dentry);
>  
> -	dquot_initialize(dip);
> +	rc = dquot_initialize(dip);
> +	if (rc)
> +		goto out1;
>  
>  	/*
>  	 * search parent directory for entry/freespace
> @@ -218,7 +220,9 @@ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, umode_t mode)
>  
>  	jfs_info("jfs_mkdir: dip:0x%p name:%pd", dip, dentry);
>  
> -	dquot_initialize(dip);
> +	rc = dquot_initialize(dip);
> +	if (rc)
> +		goto out1;
>  
>  	/*
>  	 * search parent directory for entry/freespace
> @@ -355,8 +359,12 @@ static int jfs_rmdir(struct inode *dip, struct dentry *dentry)
>  	jfs_info("jfs_rmdir: dip:0x%p name:%pd", dip, dentry);
>  
>  	/* Init inode for quota operations. */
> -	dquot_initialize(dip);
> -	dquot_initialize(ip);
> +	rc = dquot_initialize(dip);
> +	if (rc)
> +		goto out;
> +	rc = dquot_initialize(ip);
> +	if (rc)
> +		goto out;
>  
>  	/* directory must be empty to be removed */
>  	if (!dtEmpty(ip)) {
> @@ -483,8 +491,12 @@ static int jfs_unlink(struct inode *dip, struct dentry *dentry)
>  	jfs_info("jfs_unlink: dip:0x%p name:%pd", dip, dentry);
>  
>  	/* Init inode for quota operations. */
> -	dquot_initialize(dip);
> -	dquot_initialize(ip);
> +	rc = dquot_initialize(dip);
> +	if (rc)
> +		goto out;
> +	rc = dquot_initialize(ip);
> +	if (rc)
> +		goto out;
>  
>  	if ((rc = get_UCSname(&dname, dentry)))
>  		goto out;
> @@ -799,7 +811,9 @@ static int jfs_link(struct dentry *old_dentry,
>  
>  	jfs_info("jfs_link: %pd %pd", old_dentry, dentry);
>  
> -	dquot_initialize(dir);
> +	rc = dquot_initialize(dir);
> +	if (rc)
> +		goto out;
>  
>  	tid = txBegin(ip->i_sb, 0);
>  
> @@ -810,7 +824,7 @@ static int jfs_link(struct dentry *old_dentry,
>  	 * scan parent directory for entry/freespace
>  	 */
>  	if ((rc = get_UCSname(&dname, dentry)))
> -		goto out;
> +		goto out_tx;
>  
>  	if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE)))
>  		goto free_dname;
> @@ -842,12 +856,13 @@ static int jfs_link(struct dentry *old_dentry,
>        free_dname:
>  	free_UCSname(&dname);
>  
> -      out:
> +      out_tx:
>  	txEnd(tid);
>  
>  	mutex_unlock(&JFS_IP(ip)->commit_mutex);
>  	mutex_unlock(&JFS_IP(dir)->commit_mutex);
>  
> +      out:
>  	jfs_info("jfs_link: rc:%d", rc);
>  	return rc;
>  }
> @@ -891,7 +906,9 @@ static int jfs_symlink(struct inode *dip, struct dentry *dentry,
>  
>  	jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name);
>  
> -	dquot_initialize(dip);
> +	rc = dquot_initialize(dip);
> +	if (rc)
> +		goto out1;
>  
>  	ssize = strlen(name) + 1;
>  
> @@ -1082,8 +1099,12 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
>  
>  	jfs_info("jfs_rename: %pd %pd", old_dentry, new_dentry);
>  
> -	dquot_initialize(old_dir);
> -	dquot_initialize(new_dir);
> +	rc = dquot_initialize(old_dir);
> +	if (rc)
> +		goto out1;
> +	rc = dquot_initialize(new_dir);
> +	if (rc)
> +		goto out1;
>  
>  	old_ip = d_inode(old_dentry);
>  	new_ip = d_inode(new_dentry);
> @@ -1130,7 +1151,9 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
>  	} else if (new_ip) {
>  		IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL);
>  		/* Init inode for quota operations. */
> -		dquot_initialize(new_ip);
> +		rc = dquot_initialize(new_ip);
> +		if (rc)
> +			goto out_unlock;
>  	}
>  
>  	/*
> @@ -1318,6 +1341,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
>  
>  		clear_cflag(COMMIT_Stale, old_dir);
>  	}
> +      out_unlock:
>  	if (new_ip && !S_ISDIR(new_ip->i_mode))
>  		IWRITE_UNLOCK(new_ip);
>        out3:
> @@ -1353,7 +1377,9 @@ static int jfs_mknod(struct inode *dir, struct dentry *dentry,
>  
>  	jfs_info("jfs_mknod: %pd", dentry);
>  
> -	dquot_initialize(dir);
> +	rc = dquot_initialize(dir);
> +	if (rc)
> +		goto out;
>  
>  	if ((rc = get_UCSname(&dname, dentry)))
>  		goto out;
> -- 
> 2.4.5
> 
> 
-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR