quota: clean up quota active checks

The various quota operations check for any quota beeing active on
a superblock, and the inode not having the noquota flag.

Merge these two checks into a dquot_active check and move that
into dquot.c as that's the only place where it's needed.

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

1 files changed, 16 insertions, 7 deletions

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 2857fd67ff33..2eebf72d07c8 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -1315,6 +1315,15 @@ static int info_bdq_free(struct dquot *dquot, qsize_t space)
         return QUOTA_NL_NOWARN;
 }
 
+static int dquot_active(const struct inode *inode)
+{
+        struct super_block *sb = inode->i_sb;
+
+        if (IS_NOQUOTA(inode))
+                return 0;
+        return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb);
+}
+
 /*
  * Initialize quota pointers in inode
  *
@@ -1334,7 +1343,7 @@ static void __dquot_initialize(struct inode *inode, int type)
 
         /* First test before acquiring mutex - solves deadlocks when we
          * re-enter the quota code and are already holding the mutex */
-        if (!sb_any_quota_active(inode->i_sb) || IS_NOQUOTA(inode))
+        if (!dquot_active(inode))
                 return;
 
         /* First get references to structures we might need. */
@@ -1518,7 +1527,7 @@ int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags)
          * First test before acquiring mutex - solves deadlocks when we
          * re-enter the quota code and are already holding the mutex
          */
-        if (!sb_any_quota_active(inode->i_sb) || IS_NOQUOTA(inode)) {
+        if (!dquot_active(inode)) {
                 inode_incr_space(inode, number, reserve);
                 goto out;
         }
@@ -1570,7 +1579,7 @@ int dquot_alloc_inode(const struct inode *inode)
 
         /* First test before acquiring mutex - solves deadlocks when we
          * re-enter the quota code and are already holding the mutex */
-        if (!sb_any_quota_active(inode->i_sb) || IS_NOQUOTA(inode))
+        if (!dquot_active(inode))
                 return 0;
         for (cnt = 0; cnt < MAXQUOTAS; cnt++)
                 warntype[cnt] = QUOTA_NL_NOWARN;
@@ -1607,7 +1616,7 @@ int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
 {
         int cnt;
 
-        if (!sb_any_quota_active(inode->i_sb) || IS_NOQUOTA(inode)) {
+        if (!dquot_active(inode)) {
                 inode_claim_rsv_space(inode, number);
                 return 0;
         }
@@ -1640,7 +1649,7 @@ void __dquot_free_space(struct inode *inode, qsize_t number, int flags)
 
         /* First test before acquiring mutex - solves deadlocks when we
          * re-enter the quota code and are already holding the mutex */
-        if (!sb_any_quota_active(inode->i_sb) || IS_NOQUOTA(inode)) {
+        if (!dquot_active(inode)) {
                 inode_decr_space(inode, number, reserve);
                 return;
         }
@@ -1678,7 +1687,7 @@ void dquot_free_inode(const struct inode *inode)
 
         /* First test before acquiring mutex - solves deadlocks when we
          * re-enter the quota code and are already holding the mutex */
-        if (!sb_any_quota_active(inode->i_sb) || IS_NOQUOTA(inode))
+        if (!dquot_active(inode))
                 return;
 
         down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
@@ -1801,7 +1810,7 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr)
         struct super_block *sb = inode->i_sb;
         int ret;
 
-        if (!sb_any_quota_active(sb) || IS_NOQUOTA(inode))
+        if (!dquot_active(inode))
                 return 0;
 
         if (iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid)