X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Ffs.h;h=b04eab2cc663d3e17bc15c6a3c2474e6fe2907a8;hb=71ec63c5d66b577a71910b82740751be73e81310;hp=e04a5cfe874f978c91efbaa3bfe5ac71d259aefe;hpb=602cada851b28c5792339786efe872fbdc1f5d41;p=linux-2.6

diff --git a/include/linux/fs.h b/include/linux/fs.h
index e04a5cfe87..b04eab2cc6 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -435,6 +435,21 @@ struct block_device {
 	unsigned long		bd_private;
 };
 
+/*
+ * bdev->bd_mutex nesting subclasses for the lock validator:
+ *
+ * 0: normal
+ * 1: 'whole'
+ * 2: 'partition'
+ */
+enum bdev_bd_mutex_lock_class
+{
+	BD_MUTEX_NORMAL,
+	BD_MUTEX_WHOLE,
+	BD_MUTEX_PARTITION
+};
+
+
 /*
  * Radix-tree tags, for tagging dirty and writeback pages within the pagecache
  * radix trees
@@ -542,6 +557,25 @@ struct inode {
 #endif
 };
 
+/*
+ * inode->i_mutex nesting subclasses for the lock validator:
+ *
+ * 0: the object of the current VFS operation
+ * 1: parent
+ * 2: child/target
+ * 3: quota file
+ *
+ * The locking order between these classes is
+ * parent -> child -> normal -> quota
+ */
+enum inode_i_mutex_lock_class
+{
+	I_MUTEX_NORMAL,
+	I_MUTEX_PARENT,
+	I_MUTEX_CHILD,
+	I_MUTEX_QUOTA
+};
+
 /*
  * NOTE: in a 32bit arch with a preemptable kernel and
  * an UP compile the i_size_read/write must be atomic
@@ -682,6 +716,7 @@ extern spinlock_t files_lock;
 #define FL_POSIX	1
 #define FL_FLOCK	2
 #define FL_ACCESS	8	/* not trying to lock, just looking */
+#define FL_EXISTS	16	/* when unlocking, test for existence */
 #define FL_LEASE	32	/* lease held on this file */
 #define FL_CLOSE	64	/* unlock on close */
 #define FL_SLEEP	128	/* A blocking lock */
@@ -1276,6 +1311,8 @@ struct file_system_type {
 	struct module *owner;
 	struct file_system_type * next;
 	struct list_head fs_supers;
+	struct lock_class_key s_lock_key;
+	struct lock_class_key s_umount_key;
 };
 
 extern int get_sb_bdev(struct file_system_type *fs_type,
@@ -1334,6 +1371,9 @@ extern struct subsystem fs_subsys;
 #define FLOCK_VERIFY_READ  1
 #define FLOCK_VERIFY_WRITE 2
 
+/* /sys/fs */
+extern struct subsystem fs_subsys;
+
 extern int locks_mandatory_locked(struct inode *);
 extern int locks_mandatory_area(int, struct inode *, struct file *, loff_t, size_t);
 
@@ -1404,6 +1444,7 @@ extern void bd_set_size(struct block_device *, loff_t size);
 extern void bd_forget(struct inode *inode);
 extern void bdput(struct block_device *);
 extern struct block_device *open_by_devnum(dev_t, unsigned);
+extern struct block_device *open_partition_by_devnum(dev_t, unsigned);
 extern const struct file_operations def_blk_fops;
 extern const struct address_space_operations def_blk_aops;
 extern const struct file_operations def_chr_fops;
@@ -1414,6 +1455,7 @@ extern int blkdev_ioctl(struct inode *, struct file *, unsigned, unsigned long);
 extern long compat_blkdev_ioctl(struct file *, unsigned, unsigned long);
 extern int blkdev_get(struct block_device *, mode_t, unsigned);
 extern int blkdev_put(struct block_device *);
+extern int blkdev_put_partition(struct block_device *);
 extern int bd_claim(struct block_device *, void *);
 extern void bd_release(struct block_device *);
 #ifdef CONFIG_SYSFS