1 files changed, 42 insertions, 1 deletions

diff --git a/fs/jfs/ioctl.c b/fs/jfs/ioctl.c
index f19d1e04a374..bc555ff417e9 100644
--- a/fs/jfs/ioctl.c
+++ b/fs/jfs/ioctl.c
@@ -11,13 +11,17 @@
 #include <linux/mount.h>
 #include <linux/time.h>
 #include <linux/sched.h>
+#include <linux/blkdev.h>
 #include <asm/current.h>
 #include <asm/uaccess.h>
 
+#include "jfs_filsys.h"
+#include "jfs_debug.h"
 #include "jfs_incore.h"
 #include "jfs_dinode.h"
 #include "jfs_inode.h"
-
+#include "jfs_dmap.h"
+#include "jfs_discard.h"
 
 static struct {
         long jfs_flag;
@@ -123,6 +127,40 @@ setflags_out:
                 mnt_drop_write_file(filp);
                 return err;
         }
+
+        case FITRIM:
+        {
+                struct super_block *sb = inode->i_sb;
+                struct request_queue *q = bdev_get_queue(sb->s_bdev);
+                struct fstrim_range range;
+                s64 ret = 0;
+
+                if (!capable(CAP_SYS_ADMIN))
+                        return -EPERM;
+
+                if (!blk_queue_discard(q)) {
+                        jfs_warn("FITRIM not supported on device");
+                        return -EOPNOTSUPP;
+                }
+
+                if (copy_from_user(&range, (struct fstrim_range __user *)arg,
+                    sizeof(range)))
+                        return -EFAULT;
+
+                range.minlen = max_t(unsigned int, range.minlen,
+                        q->limits.discard_granularity);
+
+                ret = jfs_ioc_trim(inode, &range);
+                if (ret < 0)
+                        return ret;
+
+                if (copy_to_user((struct fstrim_range __user *)arg, &range,
+                    sizeof(range)))
+                        return -EFAULT;
+
+                return 0;
+        }
+
         default:
                 return -ENOTTY;
         }
@@ -142,6 +180,9 @@ long jfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
         case JFS_IOC_SETFLAGS32:
                 cmd = JFS_IOC_SETFLAGS;
                 break;
+        case FITRIM:
+                cmd = FITRIM;
+                break;
         }
         return jfs_ioctl(filp, cmd, arg);
 }