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| author | Luke Dashjr <luke@dashjr.org> | 2015-10-29 08:22:21 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-01 12:18:05 -0700 |
| commit | b82bec5eabf12739a955ff03a954a7cb7bf57d57 (patch) | |
| tree | e074b686368de5336c1c245bc3bff4981e27b69e /fs/btrfs/ioctl.c | |
| parent | cf1db059e661452cf84b2f8569decca0df78b06e (diff) | |
| download | lwn-b82bec5eabf12739a955ff03a954a7cb7bf57d57.tar.gz lwn-b82bec5eabf12739a955ff03a954a7cb7bf57d57.zip | |
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/btrfs/ioctl.c')
| -rw-r--r-- | fs/btrfs/ioctl.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 5a23806ae418..f545f81f642d 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -5552,3 +5552,24 @@ long btrfs_ioctl(struct file *file, unsigned int 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 |