dax: convert to bitmask for flags
In preparation for adding more flags, convert the existing flag to a bit-flag. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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5d61e43b39
Коммит
9a60c3ef57
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@ -116,13 +116,18 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize)
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EXPORT_SYMBOL_GPL(__bdev_dax_supported);
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#endif
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enum dax_device_flags {
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/* !alive + rcu grace period == no new operations / mappings */
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DAXDEV_ALIVE,
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};
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/**
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* struct dax_device - anchor object for dax services
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* @inode: core vfs
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* @cdev: optional character interface for "device dax"
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* @host: optional name for lookups where the device path is not available
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* @private: dax driver private data
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* @alive: !alive + rcu grace period == no new operations / mappings
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* @flags: state and boolean properties
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*/
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struct dax_device {
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struct hlist_node list;
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@ -130,7 +135,7 @@ struct dax_device {
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struct cdev cdev;
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const char *host;
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void *private;
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bool alive;
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unsigned long flags;
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const struct dax_operations *ops;
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};
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@ -197,7 +202,7 @@ EXPORT_SYMBOL_GPL(dax_flush);
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bool dax_alive(struct dax_device *dax_dev)
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{
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lockdep_assert_held(&dax_srcu);
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return dax_dev->alive;
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return test_bit(DAXDEV_ALIVE, &dax_dev->flags);
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}
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EXPORT_SYMBOL_GPL(dax_alive);
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@ -217,7 +222,7 @@ void kill_dax(struct dax_device *dax_dev)
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if (!dax_dev)
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return;
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dax_dev->alive = false;
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clear_bit(DAXDEV_ALIVE, &dax_dev->flags);
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synchronize_srcu(&dax_srcu);
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@ -257,7 +262,7 @@ static void dax_destroy_inode(struct inode *inode)
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{
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struct dax_device *dax_dev = to_dax_dev(inode);
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WARN_ONCE(dax_dev->alive,
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WARN_ONCE(test_bit(DAXDEV_ALIVE, &dax_dev->flags),
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"kill_dax() must be called before final iput()\n");
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call_rcu(&inode->i_rcu, dax_i_callback);
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}
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@ -309,7 +314,7 @@ static struct dax_device *dax_dev_get(dev_t devt)
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dax_dev = to_dax_dev(inode);
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if (inode->i_state & I_NEW) {
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dax_dev->alive = true;
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set_bit(DAXDEV_ALIVE, &dax_dev->flags);
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inode->i_cdev = &dax_dev->cdev;
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inode->i_mode = S_IFCHR;
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inode->i_flags = S_DAX;
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