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Message-ID: <alpine.DEB.2.00.1507091803170.13646@leontynka>
Date: Thu, 9 Jul 2015 18:05:15 +0200 (CEST)
From: Mikulas Patocka <mikulas@...bright.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
cc: Al Viro <viro@...iv.linux.org.uk>, Ted Ts'o <tytso@...gle.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: [PATCH] ioctl_compat: handle FITRIM
On Sun, 28 Jun 2015, Linus Torvalds wrote:
> On Sun, Jun 28, 2015 at 6:16 AM, Mikulas Patocka <mikulas@...bright.com> wrote:
> > This patch adds support for fstrim to the HPFS filesystem.
> ...
> > +#ifdef CONFIG_COMPAT
> > + .compat_ioctl = hpfs_compat_ioctl,
> > +#endif
> ...
> > +#ifdef CONFIG_COMPAT
> > + .compat_ioctl = hpfs_compat_ioctl,
> > +#endif
> ...
> > +#ifdef CONFIG_COMPAT
> > +long hpfs_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
> > +{
> > + return hpfs_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
> > +}
> > +#endif
>
> Hmm. You've clearly copied this pattern from other filesystems, and so
> I can't really blame you, but this thing annoys me a lot.
>
> Why isn't FITRIM just marked as a COMPATIBLE_IOCTL(), at which point
> the generic ioctl layer will do exactly the above translation for us?
>
> Am I missing something?
>
> Linus
Here I'm sending a patch that handles FITRIM in a generic way?
BTW. what happened with the other HPFS patches? They haven't been included
in Linux 4.2-rc1.
From: Mikulas Patocka <mikulas@...bright.com>
The FITRIM ioctl has the same arguments on 32-bit and 64-bit
architectures, so we can add it to the list of compatible ioctls and drop
it from compat_ioctl method of various filesystems.
Signed-off-by: Mikulas Patocka <mpatocka@...hat.com>
---
fs/compat_ioctl.c | 1 +
fs/ecryptfs/file.c | 1 -
fs/ext4/ioctl.c | 1 -
fs/hpfs/dir.c | 3 ---
fs/hpfs/file.c | 3 ---
fs/hpfs/super.c | 7 -------
fs/jfs/ioctl.c | 4 ----
fs/nilfs2/ioctl.c | 1 -
fs/ocfs2/ioctl.c | 1 -
9 files changed, 1 insertion(+), 21 deletions(-)
Index: linux-4.2-rc1/fs/compat_ioctl.c
===================================================================
--- linux-4.2-rc1.orig/fs/compat_ioctl.c 2015-07-09 16:17:16.000000000 +0200
+++ linux-4.2-rc1/fs/compat_ioctl.c 2015-07-09 16:18:50.000000000 +0200
@@ -896,6 +896,7 @@ COMPATIBLE_IOCTL(FIGETBSZ)
/* 'X' - originally XFS but some now in the VFS */
COMPATIBLE_IOCTL(FIFREEZE)
COMPATIBLE_IOCTL(FITHAW)
+COMPATIBLE_IOCTL(FITRIM)
COMPATIBLE_IOCTL(KDGETKEYCODE)
COMPATIBLE_IOCTL(KDSETKEYCODE)
COMPATIBLE_IOCTL(KDGKBTYPE)
Index: linux-4.2-rc1/fs/ecryptfs/file.c
===================================================================
--- linux-4.2-rc1.orig/fs/ecryptfs/file.c 2015-07-09 16:13:54.000000000 +0200
+++ linux-4.2-rc1/fs/ecryptfs/file.c 2015-07-09 16:14:05.000000000 +0200
@@ -325,7 +325,6 @@ ecryptfs_compat_ioctl(struct file *file,
return rc;
switch (cmd) {
- case FITRIM:
case FS_IOC32_GETFLAGS:
case FS_IOC32_SETFLAGS:
case FS_IOC32_GETVERSION:
Index: linux-4.2-rc1/fs/ext4/ioctl.c
===================================================================
--- linux-4.2-rc1.orig/fs/ext4/ioctl.c 2015-07-09 16:16:38.000000000 +0200
+++ linux-4.2-rc1/fs/ext4/ioctl.c 2015-07-09 16:16:45.000000000 +0200
@@ -755,7 +755,6 @@ long ext4_compat_ioctl(struct file *file
return err;
}
case EXT4_IOC_MOVE_EXT:
- case FITRIM:
case EXT4_IOC_RESIZE_FS:
case EXT4_IOC_PRECACHE_EXTENTS:
case EXT4_IOC_SET_ENCRYPTION_POLICY:
Index: linux-4.2-rc1/fs/hpfs/dir.c
===================================================================
--- linux-4.2-rc1.orig/fs/hpfs/dir.c 2015-07-09 16:15:22.000000000 +0200
+++ linux-4.2-rc1/fs/hpfs/dir.c 2015-07-09 16:15:26.000000000 +0200
@@ -328,7 +328,4 @@ const struct file_operations hpfs_dir_op
.release = hpfs_dir_release,
.fsync = hpfs_file_fsync,
.unlocked_ioctl = hpfs_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = hpfs_compat_ioctl,
-#endif
};
Index: linux-4.2-rc1/fs/hpfs/file.c
===================================================================
--- linux-4.2-rc1.orig/fs/hpfs/file.c 2015-07-09 16:15:30.000000000 +0200
+++ linux-4.2-rc1/fs/hpfs/file.c 2015-07-09 16:15:33.000000000 +0200
@@ -204,9 +204,6 @@ const struct file_operations hpfs_file_o
.fsync = hpfs_file_fsync,
.splice_read = generic_file_splice_read,
.unlocked_ioctl = hpfs_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = hpfs_compat_ioctl,
-#endif
};
const struct inode_operations hpfs_file_iops =
Index: linux-4.2-rc1/fs/hpfs/super.c
===================================================================
--- linux-4.2-rc1.orig/fs/hpfs/super.c 2015-07-09 16:14:53.000000000 +0200
+++ linux-4.2-rc1/fs/hpfs/super.c 2015-07-09 16:15:12.000000000 +0200
@@ -228,13 +228,6 @@ long hpfs_ioctl(struct file *file, unsig
}
}
-#ifdef CONFIG_COMPAT
-long hpfs_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
-{
- return hpfs_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
-}
-#endif
-
static struct kmem_cache * hpfs_inode_cachep;
Index: linux-4.2-rc1/fs/jfs/ioctl.c
===================================================================
--- linux-4.2-rc1.orig/fs/jfs/ioctl.c 2015-07-09 16:16:52.000000000 +0200
+++ linux-4.2-rc1/fs/jfs/ioctl.c 2015-07-09 16:17:03.000000000 +0200
@@ -180,10 +180,6 @@ long jfs_compat_ioctl(struct file *filp,
case JFS_IOC_SETFLAGS32:
cmd = JFS_IOC_SETFLAGS;
break;
- case FITRIM:
- cmd = FITRIM;
- break;
- }
return jfs_ioctl(filp, cmd, arg);
}
#endif
Index: linux-4.2-rc1/fs/nilfs2/ioctl.c
===================================================================
--- linux-4.2-rc1.orig/fs/nilfs2/ioctl.c 2015-07-09 16:13:37.000000000 +0200
+++ linux-4.2-rc1/fs/nilfs2/ioctl.c 2015-07-09 16:13:47.000000000 +0200
@@ -1369,7 +1369,6 @@ long nilfs_compat_ioctl(struct file *fil
case NILFS_IOCTL_SYNC:
case NILFS_IOCTL_RESIZE:
case NILFS_IOCTL_SET_ALLOC_RANGE:
- case FITRIM:
break;
default:
return -ENOIOCTLCMD;
Index: linux-4.2-rc1/fs/ocfs2/ioctl.c
===================================================================
--- linux-4.2-rc1.orig/fs/ocfs2/ioctl.c 2015-07-09 16:14:20.000000000 +0200
+++ linux-4.2-rc1/fs/ocfs2/ioctl.c 2015-07-09 16:14:25.000000000 +0200
@@ -980,7 +980,6 @@ long ocfs2_compat_ioctl(struct file *fil
case OCFS2_IOC_GROUP_EXTEND:
case OCFS2_IOC_GROUP_ADD:
case OCFS2_IOC_GROUP_ADD64:
- case FITRIM:
break;
case OCFS2_IOC_REFLINK:
if (copy_from_user(&args, argp, sizeof(args)))
--
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