forked from luck/tmp_suning_uos_patched
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 <namjae.jeon@samsung.com> Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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@ -103,6 +103,20 @@ static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
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return before;
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}
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/*
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* ioctl commands
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*/
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#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
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#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
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#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
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/*
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* ioctl commands in 32 bit emulation
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*/
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#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
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#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
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#endif
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/*
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* For INODE and NODE manager
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*/
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@ -850,6 +864,7 @@ void f2fs_truncate(struct inode *);
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int f2fs_setattr(struct dentry *, struct iattr *);
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int truncate_hole(struct inode *, pgoff_t, pgoff_t);
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long f2fs_ioctl(struct file *, unsigned int, unsigned long);
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long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
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/*
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* inode.c
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@ -15,6 +15,7 @@
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#include <linux/writeback.h>
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#include <linux/falloc.h>
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#include <linux/types.h>
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#include <linux/compat.h>
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#include <linux/uaccess.h>
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#include <linux/mount.h>
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@ -634,6 +635,23 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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}
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}
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#ifdef CONFIG_COMPAT
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long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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switch (cmd) {
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case F2FS_IOC32_GETFLAGS:
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cmd = F2FS_IOC_GETFLAGS;
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break;
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case F2FS_IOC32_SETFLAGS:
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cmd = F2FS_IOC_SETFLAGS;
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break;
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default:
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return -ENOIOCTLCMD;
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}
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return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
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}
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#endif
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const struct file_operations f2fs_file_operations = {
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.llseek = generic_file_llseek,
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.read = do_sync_read,
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@ -645,6 +663,9 @@ const struct file_operations f2fs_file_operations = {
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.fsync = f2fs_sync_file,
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.fallocate = f2fs_fallocate,
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.unlocked_ioctl = f2fs_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = f2fs_compat_ioctl,
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#endif
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.splice_read = generic_file_splice_read,
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.splice_write = generic_file_splice_write,
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};
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