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VFS: refactor vfs_read()

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integrity_kernel_read() duplicates the file read operations code
in vfs_read(). This patch refactors vfs_read() code creating a
helper function __vfs_read(). It is used by both vfs_read() and
integrity_kernel_read().

Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
This commit is contained in:
Dmitry Kasatkin
2014-11-05 17:01:17 +02:00
committed by Mimi Zohar
parent c57782c13e
commit 6fb5032ebb
3 changed files with 22 additions and 13 deletions
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10
security/integrity/iint.c
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@@ -184,20 +184,16 @@ int integrity_kernel_read(struct file *file, loff_t offset,
{
mm_segment_t old_fs;
char __user *buf = (char __user *)addr;
ssize_t ret = -EINVAL;
ssize_t ret;
if (!(file->f_mode & FMODE_READ))
return -EBADF;
old_fs = get_fs();
set_fs(get_ds());
if (file->f_op->read)
ret = file->f_op->read(file, buf, count, &offset);
else if (file->f_op->aio_read)
ret = do_sync_read(file, buf, count, &offset);
else if (file->f_op->read_iter)
ret = new_sync_read(file, buf, count, &offset);
ret = __vfs_read(file, buf, count, &offset);
set_fs(old_fs);
return ret;
}