skge: default WOL should be magic only (rev2)
[powerpc.git] / fs / dquot.c
index 0952cc4..3a99584 100644 (file)
@@ -69,7 +69,6 @@
 #include <linux/file.h>
 #include <linux/slab.h>
 #include <linux/sysctl.h>
-#include <linux/smp_lock.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/proc_fs.h>
@@ -79,6 +78,7 @@
 #include <linux/buffer_head.h>
 #include <linux/capability.h>
 #include <linux/quotaops.h>
+#include <linux/writeback.h> /* for inode_lock, oddly enough.. */
 
 #include <asm/uaccess.h>
 
@@ -474,7 +474,7 @@ int vfs_quota_sync(struct super_block *sb, int type)
                spin_lock(&dq_list_lock);
                dirty = &dqopt->info[cnt].dqi_dirty_list;
                while (!list_empty(dirty)) {
-                       dquot = list_entry(dirty->next, struct dquot, dq_dirty);
+                       dquot = list_first_entry(dirty, struct dquot, dq_dirty);
                        /* Dirty and inactive can be only bad dquot... */
                        if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) {
                                clear_dquot_dirty(dquot);
@@ -600,11 +600,10 @@ static struct dquot *get_empty_dquot(struct super_block *sb, int type)
 {
        struct dquot *dquot;
 
-       dquot = kmem_cache_alloc(dquot_cachep, GFP_NOFS);
+       dquot = kmem_cache_zalloc(dquot_cachep, GFP_NOFS);
        if(!dquot)
                return NODQUOT;
 
-       memset((caddr_t)dquot, 0, sizeof(struct dquot));
        mutex_init(&dquot->dq_lock);
        INIT_LIST_HEAD(&dquot->dq_free);
        INIT_LIST_HEAD(&dquot->dq_inuse);
@@ -688,23 +687,27 @@ static int dqinit_needed(struct inode *inode, int type)
 /* This routine is guarded by dqonoff_mutex mutex */
 static void add_dquot_ref(struct super_block *sb, int type)
 {
-       struct list_head *p;
+       struct inode *inode;
 
 restart:
-       file_list_lock();
-       list_for_each(p, &sb->s_files) {
-               struct file *filp = list_entry(p, struct file, f_u.fu_list);
-               struct inode *inode = filp->f_path.dentry->d_inode;
-               if (filp->f_mode & FMODE_WRITE && dqinit_needed(inode, type)) {
-                       struct dentry *dentry = dget(filp->f_path.dentry);
-                       file_list_unlock();
-                       sb->dq_op->initialize(inode, type);
-                       dput(dentry);
-                       /* As we may have blocked we had better restart... */
-                       goto restart;
-               }
+       spin_lock(&inode_lock);
+       list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
+               if (!atomic_read(&inode->i_writecount))
+                       continue;
+               if (!dqinit_needed(inode, type))
+                       continue;
+               if (inode->i_state & (I_FREEING|I_WILL_FREE))
+                       continue;
+
+               __iget(inode);
+               spin_unlock(&inode_lock);
+
+               sb->dq_op->initialize(inode, type);
+               iput(inode);
+               /* As we may have blocked we had better restart... */
+               goto restart;
        }
-       file_list_unlock();
+       spin_unlock(&inode_lock);
 }
 
 /* Return 0 if dqput() won't block (note that 1 doesn't necessarily mean blocking) */
@@ -717,7 +720,8 @@ static inline int dqput_blocks(struct dquot *dquot)
 
 /* Remove references to dquots from inode - add dquot to list for freeing if needed */
 /* We can't race with anybody because we hold dqptr_sem for writing... */
-int remove_inode_dquot_ref(struct inode *inode, int type, struct list_head *tofree_head)
+static int remove_inode_dquot_ref(struct inode *inode, int type,
+                                 struct list_head *tofree_head)
 {
        struct dquot *dquot = inode->i_dquot[type];
 
@@ -756,15 +760,30 @@ static void put_dquot_list(struct list_head *tofree_head)
        }
 }
 
+static void remove_dquot_ref(struct super_block *sb, int type,
+               struct list_head *tofree_head)
+{
+       struct inode *inode;
+
+       spin_lock(&inode_lock);
+       list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
+               if (!IS_NOQUOTA(inode))
+                       remove_inode_dquot_ref(inode, type, tofree_head);
+       }
+       spin_unlock(&inode_lock);
+}
+
 /* Gather all references from inodes and drop them */
 static void drop_dquot_ref(struct super_block *sb, int type)
 {
        LIST_HEAD(tofree_head);
 
-       down_write(&sb_dqopt(sb)->dqptr_sem);
-       remove_dquot_ref(sb, type, &tofree_head);
-       up_write(&sb_dqopt(sb)->dqptr_sem);
-       put_dquot_list(&tofree_head);
+       if (sb->dq_op) {
+               down_write(&sb_dqopt(sb)->dqptr_sem);
+               remove_dquot_ref(sb, type, &tofree_head);
+               up_write(&sb_dqopt(sb)->dqptr_sem);
+               put_dquot_list(&tofree_head);
+       }
 }
 
 static inline void dquot_incr_inodes(struct dquot *dquot, unsigned long number)
@@ -1413,7 +1432,7 @@ int vfs_quota_off(struct super_block *sb, int type)
                        mutex_unlock(&dqopt->dqonoff_mutex);
                }
        if (sb->s_bdev)
-               invalidate_bdev(sb->s_bdev, 0);
+               invalidate_bdev(sb->s_bdev);
        return 0;
 }
 
@@ -1449,7 +1468,7 @@ static int vfs_quota_on_inode(struct inode *inode, int type, int format_id)
         * we see all the changes from userspace... */
        write_inode_now(inode, 1);
        /* And now flush the block cache so that kernel sees the changes */
-       invalidate_bdev(sb->s_bdev, 0);
+       invalidate_bdev(sb->s_bdev);
        mutex_lock(&inode->i_mutex);
        mutex_lock(&dqopt->dqonoff_mutex);
        if (sb_has_quota_enabled(sb, type)) {
@@ -1822,7 +1841,7 @@ static int __init dquot_init(void)
 
        printk(KERN_NOTICE "VFS: Disk quotas %s\n", __DQUOT_VERSION__);
 
-       register_sysctl_table(sys_table, 0);
+       register_sysctl_table(sys_table);
 
        dquot_cachep = kmem_cache_create("dquot", 
                        sizeof(struct dquot), sizeof(unsigned long) * 4,