f2fs: add compat_ioctl to provide backward compatability

[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / f2fs / file.c

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 7f9ea92..b7a053d 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -15,6 +15,7 @@
 #include <linux/writeback.h>
 #include <linux/falloc.h>
 #include <linux/types.h>
+#include <linux/compat.h>
 #include <linux/uaccess.h>
 #include <linux/mount.h>
 
@@ -96,8 +97,9 @@ out:
 }
 
 static const struct vm_operations_struct f2fs_file_vm_ops = {
-       .fault        = filemap_fault,
-       .page_mkwrite = f2fs_vm_page_mkwrite,
+       .fault          = filemap_fault,
+       .page_mkwrite   = f2fs_vm_page_mkwrite,
+       .remap_pages    = generic_file_remap_pages,
 };
 
 static int need_to_sync_dir(struct f2fs_sb_info *sbi, struct inode *inode)
@@ -137,6 +139,9 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
        if (ret)
                return ret;
 
+       /* guarantee free sections for fsync */
+       f2fs_balance_fs(sbi);
+
        mutex_lock(&inode->i_mutex);
 
        if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
@@ -153,11 +158,11 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 
        if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
                need_cp = true;
-       if (is_inode_flag_set(F2FS_I(inode), FI_NEED_CP))
+       else if (is_inode_flag_set(F2FS_I(inode), FI_NEED_CP))
                need_cp = true;
-       if (!space_for_roll_forward(sbi))
+       else if (!space_for_roll_forward(sbi))
                need_cp = true;
-       if (need_to_sync_dir(sbi, inode))
+       else if (need_to_sync_dir(sbi, inode))
                need_cp = true;
 
        if (need_cp) {
@@ -294,8 +299,6 @@ void f2fs_truncate(struct inode *inode)
                inode->i_mtime = inode->i_ctime = CURRENT_TIME;
                mark_inode_dirty(inode);
        }
-
-       f2fs_balance_fs(F2FS_SB(inode->i_sb));
 }
 
 static int f2fs_getattr(struct vfsmount *mnt,
@@ -352,6 +355,7 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
                        attr->ia_size != i_size_read(inode)) {
                truncate_setsize(inode, attr->ia_size);
                f2fs_truncate(inode);
+               f2fs_balance_fs(F2FS_SB(inode->i_sb));
        }
 
        __setattr_copy(inode, attr);
@@ -383,12 +387,17 @@ const struct inode_operations f2fs_file_inode_operations = {
 static void fill_zero(struct inode *inode, pgoff_t index,
                                        loff_t start, loff_t len)
 {
+       struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
        struct page *page;
 
        if (!len)
                return;
 
+       f2fs_balance_fs(sbi);
+
+       mutex_lock_op(sbi, DATA_NEW);
        page = get_new_data_page(inode, index, false);
+       mutex_unlock_op(sbi, DATA_NEW);
 
        if (!IS_ERR(page)) {
                wait_on_page_writeback(page);
@@ -407,6 +416,8 @@ int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
                struct dnode_of_data dn;
                struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 
+               f2fs_balance_fs(sbi);
+
                mutex_lock_op(sbi, DATA_TRUNC);
                set_new_dnode(&dn, inode, NULL, NULL, 0);
                err = get_dnode_of_data(&dn, index, RDONLY_NODE);
@@ -534,7 +545,6 @@ static long f2fs_fallocate(struct file *file, int mode,
                                loff_t offset, loff_t len)
 {
        struct inode *inode = file->f_path.dentry->d_inode;
-       struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
        long ret;
 
        if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
@@ -545,7 +555,10 @@ static long f2fs_fallocate(struct file *file, int mode,
        else
                ret = expand_inode_data(inode, offset, len, mode);
 
-       f2fs_balance_fs(sbi);
+       if (!ret) {
+               inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+               mark_inode_dirty(inode);
+       }
        return ret;
 }
 
@@ -622,6 +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,
@@ -633,6 +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,
 };