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Commit fba7b940 authored by David Teigland's avatar David Teigland Committed by Steven Whitehouse
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[PATCH] Add fs_subsys to enable filesystems to use sysfs 



This creates an "fs" subdirectory in sysfs so that GFS2 (or any other
filesystem, come to that) can make use of sysfs.

Signed-off-by: default avatarDavid Teigland <teigland@redhat.com>
Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
parent b346671f

fs/namespace.c

+5 −0
Original line number Original line Diff line number Diff line
@@ -48,6 +48,10 @@ static int hash_mask __read_mostly, hash_bits __read_mostly; 
static kmem_cache_t *mnt_cache;

static kmem_cache_t *mnt_cache;

static struct rw_semaphore namespace_sem;

static struct rw_semaphore namespace_sem;





/* /sys/fs */

decl_subsys(fs, NULL, NULL);

EXPORT_SYMBOL_GPL(fs_subsys);



static inline unsigned long hash(struct vfsmount *mnt, struct dentry *dentry)

static inline unsigned long hash(struct vfsmount *mnt, struct dentry *dentry)

{

{

	unsigned long tmp = ((unsigned long)mnt / L1_CACHE_BYTES);

	unsigned long tmp = ((unsigned long)mnt / L1_CACHE_BYTES);
@@ -1725,6 +1729,7 @@ void __init mnt_init(unsigned long mempages) 
		i--;

		i--;

	} while (i);

	} while (i);

	sysfs_init();

	sysfs_init();

	subsystem_register(&fs_subsys);

	init_rootfs();

	init_rootfs();

	init_mount_tree();

	init_mount_tree();

}

}

include/linux/fs.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -1293,6 +1293,9 @@ extern int vfs_statfs(struct super_block *, struct kstatfs *); 
#define FLOCK_VERIFY_READ  1

#define FLOCK_VERIFY_READ  1

#define FLOCK_VERIFY_WRITE 2

#define FLOCK_VERIFY_WRITE 2





/* /sys/fs */

extern struct subsystem fs_subsys;



extern int locks_mandatory_locked(struct inode *);

extern int locks_mandatory_locked(struct inode *);

extern int locks_mandatory_area(int, struct inode *, struct file *, loff_t, size_t);

extern int locks_mandatory_area(int, struct inode *, struct file *, loff_t, size_t);