btrfs: refactor btrfs_set_prop and add btrfs_set_prop_trans

btrfs_set_prop() takes transaction pointer as the first argument,
however in ioctl.c for the purpose of setting the compression property,
we call btrfs_set_prop() with NULL transaction pointer. Down in
the call chain  btrfs_setxattr() starts transaction to update the
attribute and also to update the inode.

So for clarity, create btrfs_set_prop_trans() with no transaction
pointer as argument, in preparation to start transaction here instead of
doing it down the call chain at btrfs_setxattr().

Also now the btrfs_set_prop() is a static function.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index c156678..4d945b3 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -284,8 +284,8 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
                binode->flags &= ~BTRFS_INODE_COMPRESS;
                binode->flags |= BTRFS_INODE_NOCOMPRESS;
 
-               ret = btrfs_set_prop(NULL, inode, "btrfs.compression", NULL, 0,
-                                    0);
+               ret = btrfs_set_prop_trans(inode, "btrfs.compression", NULL,
+                                          0, 0);
                if (ret && ret != -ENODATA)
                        goto out_drop;
        } else if (fsflags & FS_COMPR_FL) {
@@ -303,14 +303,14 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
                if (!comp || comp[0] == 0)
                        comp = btrfs_compress_type2str(BTRFS_COMPRESS_ZLIB);
 
-               ret = btrfs_set_prop(NULL, inode, "btrfs.compression", comp,
-                                    strlen(comp), 0);
+               ret = btrfs_set_prop_trans(inode, "btrfs.compression", comp,
+                                          strlen(comp), 0);
                if (ret)
                        goto out_drop;
 
        } else {
-               ret = btrfs_set_prop(NULL, inode, "btrfs.compression", NULL, 0,
-                                    0);
+               ret = btrfs_set_prop_trans(inode, "btrfs.compression", NULL,
+                                          0, 0);
                if (ret && ret != -ENODATA)
                        goto out_drop;
                binode->flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS);

diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c
index c52cd78..722ccf6 100644 (file)
--- a/fs/btrfs/props.c
+++ b/fs/btrfs/props.c
@@ -55,9 +55,9 @@ find_prop_handler(const char *name,
        return NULL;
 }
 
-int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
-                  const char *name, const char *value, size_t value_len,
-                  int flags)
+static int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
+                         const char *name, const char *value, size_t value_len,
+                         int flags)
 {
        const struct prop_handler *handler;
        int ret;
@@ -100,6 +100,12 @@ int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
        return 0;
 }
 
+int btrfs_set_prop_trans(struct inode *inode, const char *name,
+                        const char *value, size_t value_len, int flags)
+{
+       return btrfs_set_prop(NULL, inode, name, value, value_len, flags);
+}
+
 static int iterate_object_props(struct btrfs_root *root,
                                struct btrfs_path *path,
                                u64 objectid,

diff --git a/fs/btrfs/props.h b/fs/btrfs/props.h
index 9dbdae4..b1a6b23 100644 (file)
--- a/fs/btrfs/props.h
+++ b/fs/btrfs/props.h
@@ -10,9 +10,8 @@
 
 void __init btrfs_props_init(void);
 
-int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
-                  const char *name, const char *value, size_t value_len,
-                  int flags);
+int btrfs_set_prop_trans(struct inode *inode, const char *name,
+                        const char *value, size_t value_len, int flags);
 
 int btrfs_load_inode_props(struct inode *inode, struct btrfs_path *path);
 

diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 6971cbf..69126d5 100644 (file)
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -379,7 +379,7 @@ static int btrfs_xattr_handler_set_prop(const struct xattr_handler *handler,
                                        size_t size, int flags)
 {
        name = xattr_full_name(handler, name);
-       return btrfs_set_prop(NULL, inode, name, value, size, flags);
+       return btrfs_set_prop_trans(inode, name, value, size, flags);
 }
 
 static const struct xattr_handler btrfs_security_xattr_handler = {