dquot: cleanup dquot transfer routine

Get rid of the transfer dquot operation - it is now always called from
the filesystem and if a filesystem really needs it's own (which none
currently does) it can just call into it's own routine directly.

Rename the now static low-level dquot_transfer helper to __dquot_transfer
and vfs_dq_transfer to dquot_transfer to have a consistent namespace,
and make the new dquot_transfer return a normal negative errno value
which all callers expect.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

17 files changed, 19 insertions, 29 deletions

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 4428f55f2131..4574e0272bdd 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -462,7 +462,6 @@ in sys_read() and friends.
 prototypes:
         int (*initialize) (struct inode *, int);
         int (*drop) (struct inode *);
-        int (*transfer) (struct inode *, struct iattr *);
         int (*write_dquot) (struct dquot *);
         int (*acquire_dquot) (struct dquot *);
         int (*release_dquot) (struct dquot *);
@@ -477,7 +476,6 @@ What filesystem should expect from the generic quota functions:
                 FS recursion    Held locks when called
 initialize:     yes             maybe dqonoff_sem
 drop:           yes             -
-transfer:       yes             -
 write_dquot:    yes             dqonoff_sem or dqptr_sem
 acquire_dquot:  yes             dqonoff_sem or dqptr_sem
 release_dquot:  yes             dqonoff_sem or dqptr_sem
diff --git a/drivers/staging/pohmelfs/inode.c b/drivers/staging/pohmelfs/inode.c
index f69b7783027f..11fc4d5c43e1 100644
--- a/drivers/staging/pohmelfs/inode.c
+++ b/drivers/staging/pohmelfs/inode.c
@@ -969,7 +969,7 @@ int pohmelfs_setattr_raw(struct inode *inode, struct iattr *attr)
 
         if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
             (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
-                err = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0;
+                err = dquot_transfer(inode, attr);
                 if (err)
                         goto err_out_exit;
         }
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 71b032c65a02..3cfcfd9a131a 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1459,7 +1459,7 @@ int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
                 return error;
         if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
             (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
-                error = vfs_dq_transfer(inode, iattr) ? -EDQUOT : 0;
+                error = dquot_transfer(inode, iattr);
                 if (error)
                         return error;
         }
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 20f02d69365c..14d40a4dd6f0 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -3160,7 +3160,7 @@ int ext3_setattr(struct dentry *dentry, struct iattr *attr)
                         error = PTR_ERR(handle);
                         goto err_out;
                 }
-                error = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0;
+                error = dquot_transfer(inode, attr);
                 if (error) {
                         ext3_journal_stop(handle);
                         return error;
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 8b8bc4f9cb14..f7d4a2c19dee 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -752,7 +752,6 @@ static ssize_t ext3_quota_write(struct super_block *sb, int type,
 static const struct dquot_operations ext3_quota_operations = {
         .initialize     = dquot_initialize,
         .drop           = dquot_drop,
-        .transfer       = dquot_transfer,
         .write_dquot    = ext3_write_dquot,
         .acquire_dquot  = ext3_acquire_dquot,
         .release_dquot  = ext3_release_dquot,
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9f607ea411c8..6a002a6d0624 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5263,7 +5263,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
                         error = PTR_ERR(handle);
                         goto err_out;
                 }
-                error = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0;
+                error = dquot_transfer(inode, attr);
                 if (error) {
                         ext4_journal_stop(handle);
                         return error;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index d231da8798e3..b4253fb7bab6 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1017,7 +1017,6 @@ static const struct dquot_operations ext4_quota_operations = {
 #ifdef CONFIG_QUOTA
         .get_reserved_space = ext4_get_reserved_space,
 #endif
-        .transfer       = dquot_transfer,
         .write_dquot    = ext4_write_dquot,
         .acquire_dquot  = ext4_acquire_dquot,
         .release_dquot  = ext4_release_dquot,
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index a4229e49330e..2c201783836f 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -100,8 +100,9 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
 
         if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
             (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
-                if (vfs_dq_transfer(inode, iattr))
-                        return -EDQUOT;
+                rc = dquot_transfer(inode, iattr);
+                if (rc)
+                        return rc;
         }
 
         rc = inode_setattr(inode, iattr);
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 6cf3d8d18369..472e8f8bc892 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1020,7 +1020,7 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
                 /*
                  * Gather pointers to quota structures so that allocation /
                  * freeing of quota structures happens here and not inside
-                 * vfs_dq_transfer() where we have problems with lock ordering
+                 * dquot_transfer() where we have problems with lock ordering
                  */
                 if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid
                     && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
@@ -1053,7 +1053,7 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
                         mlog_errno(status);
                         goto bail_unlock;
                 }
-                status = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0;
+                status = dquot_transfer(inode, attr);
                 if (status < 0)
                         goto bail_commit;
         } else {
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index ed96b3eeb13c..b654bd103b6f 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -853,7 +853,6 @@ static void ocfs2_destroy_dquot(struct dquot *dquot)
 const struct dquot_operations ocfs2_quota_operations = {
         .initialize     = dquot_initialize,
         .drop           = dquot_drop,
-        .transfer       = dquot_transfer,
         .write_dquot    = ocfs2_write_dquot,
         .acquire_dquot  = ocfs2_acquire_dquot,
         .release_dquot  = ocfs2_release_dquot,
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index ed131318b849..78ce4c48ad77 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -1669,7 +1669,7 @@ EXPORT_SYMBOL(dquot_free_inode);
  * This operation can block, but only after everything is updated
  * A transaction must be started when entering this function.
  */
-int dquot_transfer(struct inode *inode, qid_t *chid, unsigned long mask)
+static int __dquot_transfer(struct inode *inode, qid_t *chid, unsigned long mask)
 {
         qsize_t space, cur_space;
         qsize_t rsv_space = 0;
@@ -1766,12 +1766,11 @@ over_quota:
         ret = NO_QUOTA;
         goto warn_put_all;
 }
-EXPORT_SYMBOL(dquot_transfer);
 
 /* Wrapper for transferring ownership of an inode for uid/gid only
  * Called from FSXXX_setattr()
  */
-int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
+int dquot_transfer(struct inode *inode, struct iattr *iattr)
 {
         qid_t chid[MAXQUOTAS];
         unsigned long mask = 0;
@@ -1786,12 +1785,12 @@ int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
         }
         if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode)) {
                 vfs_dq_init(inode);
-                if (inode->i_sb->dq_op->transfer(inode, chid, mask) == NO_QUOTA)
-                        return 1;
+                if (__dquot_transfer(inode, chid, mask) == NO_QUOTA)
+                        return -EDQUOT;
         }
         return 0;
 }
-EXPORT_SYMBOL(vfs_dq_transfer);
+EXPORT_SYMBOL(dquot_transfer);
 
 /*
  * Write info of quota file to disk
@@ -1814,7 +1813,6 @@ EXPORT_SYMBOL(dquot_commit_info);
 const struct dquot_operations dquot_operations = {
         .initialize     = dquot_initialize,
         .drop           = dquot_drop,
-        .transfer       = dquot_transfer,
         .write_dquot    = dquot_commit,
         .acquire_dquot  = dquot_acquire,
         .release_dquot  = dquot_release,
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index f56a3d2e6497..99a5e5a8ab5a 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3134,8 +3134,7 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
                                                   jbegin_count);
                                 if (error)
                                         goto out;
-                                error =
-                                    vfs_dq_transfer(inode, attr) ? -EDQUOT : 0;
+                                error = dquot_transfer(inode, attr);
                                 if (error) {
                                         journal_end(&th, inode->i_sb,
                                                     jbegin_count);
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index e942ceecf2b8..97c3e8ed7db6 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -618,7 +618,6 @@ static int reiserfs_quota_on(struct super_block *, int, int, char *, int);
 static const struct dquot_operations reiserfs_quota_operations = {
         .initialize = dquot_initialize,
         .drop = dquot_drop,
-        .transfer = dquot_transfer,
         .write_dquot = reiserfs_write_dquot,
         .acquire_dquot = reiserfs_acquire_dquot,
         .release_dquot = reiserfs_release_dquot,
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 35ca47281faa..2df7fcb677b3 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -229,7 +229,7 @@ static int udf_setattr(struct dentry *dentry, struct iattr *iattr)
 
         if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
             (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
-                error = vfs_dq_transfer(inode, iattr) ? -EDQUOT : 0;
+                error = dquot_transfer(inode, iattr);
                 if (error)
                         return error;
         }
diff --git a/fs/ufs/truncate.c b/fs/ufs/truncate.c
index 56ab31f00bd0..87bbab685901 100644
--- a/fs/ufs/truncate.c
+++ b/fs/ufs/truncate.c
@@ -520,7 +520,7 @@ static int ufs_setattr(struct dentry *dentry, struct iattr *attr)
 
         if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
             (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
-                error = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0;
+                error = dquot_transfer(inode, attr);
                 if (error)
                         return error;
         }
diff --git a/include/linux/quota.h b/include/linux/quota.h
index e3b07895d327..422e6aa78edc 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -297,7 +297,6 @@ struct quota_format_ops {
 struct dquot_operations {
         int (*initialize) (struct inode *, int);
         int (*drop) (struct inode *);
-        int (*transfer) (struct inode *, qid_t *, unsigned long);
         int (*write_dquot) (struct dquot *);            /* Ordinary dquot write */
         struct dquot *(*alloc_dquot)(struct super_block *, int);        /* Allocate memory for new dquot */
         void (*destroy_dquot)(struct dquot *);          /* Free memory for dquot */
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 9ce7f051a4ba..fa27b7218c82 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -42,7 +42,6 @@ int dquot_alloc_inode(const struct inode *inode);
 int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
 void dquot_free_inode(const struct inode *inode);
 
-int dquot_transfer(struct inode *inode, qid_t *chid, unsigned long mask);
 int dquot_commit(struct dquot *dquot);
 int dquot_acquire(struct dquot *dquot);
 int dquot_release(struct dquot *dquot);
@@ -66,7 +65,7 @@ int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *d
 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
 
 void vfs_dq_drop(struct inode *inode);
-int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
+int dquot_transfer(struct inode *inode, struct iattr *iattr);
 int vfs_dq_quota_on_remount(struct super_block *sb);
 
 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
@@ -234,7 +233,7 @@ static inline int vfs_dq_quota_on_remount(struct super_block *sb)
         return 0;
 }
 
-static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
+static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
 {
         return 0;
 }