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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2011-02-03 13:26:17 +0100 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2011-03-08 06:58:30 +0100 |
| commit | 828b1c50ae11e6dda68f8dfefe43b74c7182b157 (patch) | |
| tree | 9c258f65382865edb71e06bf11007071fb058806 /fs/nilfs2/ioctl.c | |
| parent | nilfs2: implement FS_IOC_GETFLAGS/SETFLAGS/GETVERSION (diff) | |
| download | linux-828b1c50ae11e6dda68f8dfefe43b74c7182b157.tar.xz linux-828b1c50ae11e6dda68f8dfefe43b74c7182b157.zip | |
nilfs2: add compat ioctl
The current FS_IOC_GETFLAGS/SETFLAGS/GETVERSION will fail if
application is 32 bit and kernel is 64 bit.
This issue is avoidable by adding compat_ioctl method.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/ioctl.c')
| -rw-r--r-- | fs/nilfs2/ioctl.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c index 3aad6413aba4..d89173edd7fe 100644 --- a/fs/nilfs2/ioctl.c +++ b/fs/nilfs2/ioctl.c @@ -26,6 +26,7 @@ #include <linux/capability.h> /* capable() */ #include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */ #include <linux/vmalloc.h> +#include <linux/compat.h> /* compat_ptr() */ #include <linux/mount.h> /* mnt_want_write(), mnt_drop_write() */ #include <linux/nilfs2_fs.h> #include "nilfs.h" @@ -766,3 +767,23 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) return -ENOTTY; } } + +#ifdef CONFIG_COMPAT +long nilfs_compat_ioctl(struct file *filp, 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 nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); +} +#endif |