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Index: linux-2.4/drivers/evms/evms.c
--- linux-2.4/drivers/evms/evms.c 8 Mar 2002 23:50:12 -0000
+++ linux-2.4/drivers/evms/evms.c 11 Mar 2002 16:18:37 -0000
@@ -55,7 +55,7 @@
#include <linux/smp_lock.h>
#include <linux/evms/evms_kernel.h>
-//#define VFS_PATCH_PRESENT
+#define VFS_PATCH_PRESENT
/* prefix used in logging messages */
#define LOG_PREFIX
Index: linux-2.4/drivers/md/lvm.c
--- linux-2.4/drivers/md/lvm.c 8 Mar 2002 23:50:12 -0000
+++ linux-2.4/drivers/md/lvm.c 11 Mar 2002 16:18:37 -0000
@@ -162,7 +162,7 @@
#define DEVICE_OFF(device)
/* lvm_do_lv_create calls fsync_dev_lockfs()/unlockfs() */
-/* #define LVM_VFS_ENHANCEMENT */
+#define LVM_VFS_ENHANCEMENT
#include <linux/config.h>
#include <linux/version.h>
Index: linux-2.4/fs/buffer.c
--- linux-2.4/fs/buffer.c 8 Mar 2002 23:50:12 -0000
+++ linux-2.4/fs/buffer.c 11 Mar 2002 16:18:37 -0000
@@ -331,6 +331,28 @@
return sync_buffers(dev, 1);
}
+int fsync_dev_lockfs(kdev_t dev)
+{
+ sync_buffers(dev, 0);
+
+ lock_kernel();
+ /* note, the FS might need to start transactions to
+ ** sync the inodes, or the quota, no locking until
+ ** after these are done
+ */
+ sync_inodes(dev);
+ DQUOT_SYNC(dev);
+ sync_supers(dev);
+ /* if inodes or quotas could be dirtied during the
+ ** sync_supers_lockfs call, the FS is responsible for getting
+ ** them on disk, without deadlocking against the lock
+ */
+ sync_supers_lockfs(dev) ;
+ unlock_kernel();
+
+ return sync_buffers(dev, 1) ;
+}
+
asmlinkage long sys_sync(void)
{
fsync_dev(0);
Index: linux-2.4/fs/super.c
--- linux-2.4/fs/super.c 8 Mar 2002 23:50:12 -0000
+++ linux-2.4/fs/super.c 11 Mar 2002 16:18:37 -0000
@@ -630,6 +630,46 @@
}
}
+/*
+ * Note: don't check the dirty flag before waiting, we want the lock
+ * to happen every time this is called.
+ */
+void sync_supers_lockfs(kdev_t dev)
+{
+ struct super_block * sb;
+
+ for (sb = sb_entry(super_blocks.next);
+ sb != sb_entry(&super_blocks);
+ sb = sb_entry(sb->s_list.next)) {
+ if (!sb->s_dev)
+ continue;
+ if (dev && sb->s_dev != dev)
+ continue;
+ lock_super(sb);
+ if (sb->s_dev && (!dev || dev == sb->s_dev))
+ if (sb->s_op && sb->s_op->write_super_lockfs)
+ sb->s_op->write_super_lockfs(sb);
+ unlock_super(sb);
+ }
+}
+
+void unlockfs(kdev_t dev)
+{
+ struct super_block * sb;
+
+ for (sb = sb_entry(super_blocks.next);
+ sb != sb_entry(&super_blocks);
+ sb = sb_entry(sb->s_list.next)) {
+ if (!sb->s_dev)
+ continue;
+ if (dev && sb->s_dev != dev)
+ continue;
+ if (sb->s_dev && (!dev || dev == sb->s_dev))
+ if (sb->s_op && sb->s_op->unlockfs)
+ sb->s_op->unlockfs(sb);
+ }
+}
+
/**
* get_super - get the superblock of a device
* @dev: device to get the superblock for
Index: linux-2.4/include/linux/fs.h
--- linux-2.4/include/linux/fs.h 8 Mar 2002 23:50:12 -0000
+++ linux-2.4/include/linux/fs.h 11 Mar 2002 16:18:37 -0000
@@ -1096,6 +1096,7 @@
extern void write_inode_now(struct inode *, int);
extern void sync_dev(kdev_t);
extern int fsync_dev(kdev_t);
+extern int fsync_dev_lockfs(kdev_t);
extern int fsync_super(struct super_block *);
extern void sync_inodes_sb(struct super_block *);
extern int fsync_inode_buffers(struct inode *);
@@ -1104,6 +1105,8 @@
extern void filemap_fdatasync(struct address_space *);
extern void filemap_fdatawait(struct address_space *);
extern void sync_supers(kdev_t);
+extern void sync_supers_lockfs(kdev_t);
+extern void unlockfs(kdev_t);
extern int bmap(struct inode *, int);
extern int notify_change(struct dentry *, struct iattr *);
extern int permission(struct inode *, int);
Index: linux-2.4/kernel/ksyms.c
--- linux-2.4/kernel/ksyms.c 8 Mar 2002 23:50:12 -0000
+++ linux-2.4/kernel/ksyms.c 11 Mar 2002 16:18:37 -0000
@@ -177,6 +177,8 @@
EXPORT_SYMBOL(invalidate_inode_pages);
EXPORT_SYMBOL(truncate_inode_pages);
EXPORT_SYMBOL(fsync_dev);
+EXPORT_SYMBOL(fsync_dev_lockfs);
+EXPORT_SYMBOL(unlockfs);
EXPORT_SYMBOL(permission);
EXPORT_SYMBOL(vfs_permission);
EXPORT_SYMBOL(inode_setattr);
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