quota: unify quota init condition in setattr

Quota must being initialized if size or uid/git changes requested.
But initialization performed in two different places:
in case of i_size file system is responsible for dquot init
, but in case of uid/gid init will be called internally in
dquot_transfer().
This ambiguity makes code harder to understand.
Let's move this logic to one common helper function.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>

10 files changed, 23 insertions, 15 deletions

diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index b90c3bf6e9ba..527c46d9bc1f 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1466,7 +1466,7 @@ int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
         if (error)
                 return error;
 
-        if (iattr->ia_valid & ATTR_SIZE)
+        if (is_quota_modification(inode, iattr))
                 dquot_initialize(inode);
         if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
             (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index ea33bdf0a300..735f0190ec2a 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -3151,7 +3151,7 @@ int ext3_setattr(struct dentry *dentry, struct iattr *attr)
         if (error)
                 return error;
 
-        if (ia_valid & ATTR_SIZE)
+        if (is_quota_modification(inode, attr))
                 dquot_initialize(inode);
         if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
                 (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 81d605412844..3e0f6af9d08d 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5425,7 +5425,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
         if (error)
                 return error;
 
-        if (ia_valid & ATTR_SIZE)
+        if (is_quota_modification(inode, attr))
                 dquot_initialize(inode);
         if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
                 (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 14ba982b3f24..85d9ec659225 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -98,7 +98,7 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
         if (rc)
                 return rc;
 
-        if (iattr->ia_valid & ATTR_SIZE)
+        if (is_quota_modification(inode, iattr))
                 dquot_initialize(inode);
         if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
             (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index f74f1400eccd..e127c53ec2e7 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -966,10 +966,10 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
         if (status)
                 return status;
 
+        if (is_quota_modification(inode, attr))
+                dquot_initialize(inode);
         size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
         if (size_change) {
-                dquot_initialize(inode);
-
                 status = ocfs2_rw_lock(inode, 1);
                 if (status < 0) {
                         mlog_errno(status);
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index b1a5036560a9..1056a21f0300 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -1822,10 +1822,9 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr)
                 mask |= 1 << GRPQUOTA;
                 chid[GRPQUOTA] = iattr->ia_gid;
         }
-        if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode)) {
-                dquot_initialize(inode);
+        if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
                 return __dquot_transfer(inode, chid, mask);
-        }
+
         return 0;
 }
 EXPORT_SYMBOL(dquot_transfer);
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index dc2c65e04853..0f22fdaf54ac 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3076,9 +3076,10 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
         ia_valid = attr->ia_valid &= ~(ATTR_KILL_SUID|ATTR_KILL_SGID);
 
         depth = reiserfs_write_lock_once(inode->i_sb);
-        if (attr->ia_valid & ATTR_SIZE) {
+        if (is_quota_modification(inode, attr))
                 dquot_initialize(inode);
 
+        if (attr->ia_valid & ATTR_SIZE) {
                 /* version 2 items will be caught by the s_maxbytes check
                  ** done for us in vmtruncate
                  */
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 4b6a46ccbf46..6ebc043f3a2a 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -227,7 +227,7 @@ int udf_setattr(struct dentry *dentry, struct iattr *iattr)
         if (error)
                 return error;
 
-        if (iattr->ia_valid & ATTR_SIZE)
+        if (is_quota_modification(inode, iattr))
                 dquot_initialize(inode);
 
         if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
diff --git a/fs/ufs/truncate.c b/fs/ufs/truncate.c
index ee8db3e77bfe..f294c44577dc 100644
--- a/fs/ufs/truncate.c
+++ b/fs/ufs/truncate.c
@@ -518,18 +518,18 @@ int ufs_setattr(struct dentry *dentry, struct iattr *attr)
         if (error)
                 return error;
 
+        if (is_quota_modification(inode, attr))
+                dquot_initialize(inode);
+
         if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
             (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
                 error = dquot_transfer(inode, attr);
                 if (error)
                         return error;
         }
-        if (ia_valid & ATTR_SIZE &&
-            attr->ia_size != i_size_read(inode)) {
+        if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
                 loff_t old_i_size = inode->i_size;
 
-                dquot_initialize(inode);
-
                 error = vmtruncate(inode, attr->ia_size);
                 if (error)
                         return error;
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 82c70c42d035..8a7818764a67 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -14,6 +14,14 @@ static inline struct quota_info *sb_dqopt(struct super_block *sb)
         return &sb->s_dquot;
 }
 
+/* i_mutex must being held */
+static inline bool is_quota_modification(struct inode *inode, struct iattr *ia)
+{
+        return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_size) ||
+                (ia->ia_valid & ATTR_UID && ia->ia_uid != inode->i_uid) ||
+                (ia->ia_valid & ATTR_GID && ia->ia_gid != inode->i_gid);
+}
+
 #if defined(CONFIG_QUOTA)
 
 /*