blob: 440f40944baa3e7ce06380acd6deaa0bd217ef5b [file] [log] [blame]
From: Luke Dashjr <luke@dashjr.org>
Date: Thu, 29 Oct 2015 08:22:21 +0000
Subject: btrfs: bugfix: handle FS_IOC32_{GETFLAGS,SETFLAGS,GETVERSION} in
btrfs_ioctl
commit 4c63c2454eff996c5e27991221106eb511f7db38 upstream.
32-bit ioctl uses these rather than the regular FS_IOC_* versions. They can
be handled in btrfs using the same code. Without this, 32-bit {ch,ls}attr
fail.
Signed-off-by: Luke Dashjr <luke-jr+git@utopios.org>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
fs/btrfs/ctree.h | 1 +
fs/btrfs/file.c | 2 +-
fs/btrfs/inode.c | 2 +-
fs/btrfs/ioctl.c | 21 +++++++++++++++++++++
4 files changed, 24 insertions(+), 2 deletions(-)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2749,6 +2749,7 @@ extern const struct dentry_operations bt
/* ioctl.c */
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
+long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
void btrfs_update_iflags(struct inode *inode);
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
int btrfs_defrag_file(struct inode *inode, struct file *file,
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1895,6 +1895,6 @@ const struct file_operations btrfs_file_
.fallocate = btrfs_fallocate,
.unlocked_ioctl = btrfs_ioctl,
#ifdef CONFIG_COMPAT
- .compat_ioctl = btrfs_ioctl,
+ .compat_ioctl = btrfs_compat_ioctl,
#endif
};
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7475,7 +7475,7 @@ static const struct file_operations btrf
.readdir = btrfs_real_readdir,
.unlocked_ioctl = btrfs_ioctl,
#ifdef CONFIG_COMPAT
- .compat_ioctl = btrfs_ioctl,
+ .compat_ioctl = btrfs_compat_ioctl,
#endif
.release = btrfs_release_file,
.fsync = btrfs_sync_file,
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3260,3 +3260,24 @@ long btrfs_ioctl(struct file *file, unsi
return -ENOTTY;
}
+
+#ifdef CONFIG_COMPAT
+long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case FS_IOC32_GETFLAGS:
+ cmd = FS_IOC_GETFLAGS;
+ break;
+ case FS_IOC32_SETFLAGS:
+ cmd = FS_IOC_SETFLAGS;
+ break;
+ case FS_IOC32_GETVERSION:
+ cmd = FS_IOC_GETVERSION;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ return btrfs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
+}
+#endif