btrfs: add FS_IOC_FSGETXATTR ioctl

[sfrench/cifs-2.6.git] / fs / btrfs / ioctl.c

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 054fa20ef193435abec99583194ce99eb030a1b2..c3100f3988e2258f4d4c52dc923cfaae629731ab 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -370,6 +370,24 @@ static int check_xflags(unsigned int flags)
        return 0;
 }
 
+/*
+ * Set the xflags from the internal inode flags. The remaining items of fsxattr
+ * are zeroed.
+ */
+static int btrfs_ioctl_fsgetxattr(struct file *file, void __user *arg)
+{
+       struct btrfs_inode *binode = BTRFS_I(file_inode(file));
+       struct fsxattr fa;
+
+       memset(&fa, 0, sizeof(fa));
+       fa.fsx_xflags = btrfs_inode_flags_to_xflags(binode->flags);
+
+       if (copy_to_user(arg, &fa, sizeof(fa)))
+               return -EFAULT;
+
+       return 0;
+}
+
 static int btrfs_ioctl_getversion(struct file *file, int __user *arg)
 {
        struct inode *inode = file_inode(file);
@@ -5409,6 +5427,8 @@ long btrfs_ioctl(struct file *file, unsigned int
                return btrfs_ioctl_get_features(file, argp);
        case BTRFS_IOC_SET_FEATURES:
                return btrfs_ioctl_set_features(file, argp);
+       case FS_IOC_FSGETXATTR:
+               return btrfs_ioctl_fsgetxattr(file, argp);
        }
 
        return -ENOTTY;