From e9750824114ff939d9da299e73651add6aa65456 Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Mon, 4 Feb 2013 23:41:41 +0900 Subject: f2fs: add compat_ioctl to provide backward compatability adding compat_ioctl to provide support for backward comptability - 32bit binary execution on 64bit kernel. Signed-off-by: Namjae Jeon Signed-off-by: Amit Sahrawat Signed-off-by: Jaegeuk Kim --- fs/f2fs/f2fs.h | 15 +++++++++++++++ fs/f2fs/file.c | 21 +++++++++++++++++++++ 2 files changed, 36 insertions(+) (limited to 'fs/f2fs') diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index e7e7a29767d..c3462b69917 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -103,6 +103,20 @@ static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) return before; } +/* + * ioctl commands + */ +#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS +#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS + +#if defined(__KERNEL__) && defined(CONFIG_COMPAT) +/* + * ioctl commands in 32 bit emulation + */ +#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS +#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS +#endif + /* * For INODE and NODE manager */ @@ -850,6 +864,7 @@ void f2fs_truncate(struct inode *); int f2fs_setattr(struct dentry *, struct iattr *); int truncate_hole(struct inode *, pgoff_t, pgoff_t); long f2fs_ioctl(struct file *, unsigned int, unsigned long); +long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long); /* * inode.c diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 33d1736ee5f..b7a053d4c6d 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -634,6 +635,23 @@ out: } } +#ifdef CONFIG_COMPAT +long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + case F2FS_IOC32_GETFLAGS: + cmd = F2FS_IOC_GETFLAGS; + break; + case F2FS_IOC32_SETFLAGS: + cmd = F2FS_IOC_SETFLAGS; + break; + default: + return -ENOIOCTLCMD; + } + return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); +} +#endif + const struct file_operations f2fs_file_operations = { .llseek = generic_file_llseek, .read = do_sync_read, @@ -645,6 +663,9 @@ const struct file_operations f2fs_file_operations = { .fsync = f2fs_sync_file, .fallocate = f2fs_fallocate, .unlocked_ioctl = f2fs_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = f2fs_compat_ioctl, +#endif .splice_read = generic_file_splice_read, .splice_write = generic_file_splice_write, }; -- cgit v1.2.3-18-g5258