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#include <sys/kobj.h>
#include "config.h"
void *rootdir = NULL;
EXPORT_SYMBOL(rootdir);
struct _buf *
kobj_open_file(const char *name)
{
struct _buf *file;
struct file *fp;
fp = filp_open(name, O_RDONLY, 0644);
if (IS_ERR(fp))
return ((_buf_t *)-1UL);
file = kmem_zalloc(sizeof(_buf_t), KM_SLEEP);
file->fp = fp;
return file;
} /* kobj_open_file() */
EXPORT_SYMBOL(kobj_open_file);
void
kobj_close_file(struct _buf *file)
{
filp_close(file->fp, 0);
kmem_free(file, sizeof(_buf_t));
return;
} /* kobj_close_file() */
EXPORT_SYMBOL(kobj_close_file);
int
kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off)
{
loff_t offset = off;
mm_segment_t saved_fs;
int rc;
if (!file || !file->fp)
return -EINVAL;
if (!file->fp->f_op || !file->fp->f_op->read)
return -ENOSYS;
/* Writable user data segment must be briefly increased for this
* process so we can use the user space read call paths to write
* in to memory allocated by the kernel. */
saved_fs = get_fs();
set_fs(get_ds());
rc = file->fp->f_op->read(file->fp, buf, size, &offset);
set_fs(saved_fs);
return rc;
} /* kobj_read_file() */
EXPORT_SYMBOL(kobj_read_file);
int
kobj_get_filesize(struct _buf *file, uint64_t *size)
{
struct kstat stat;
int rc;
if (!file || !file->fp || !size)
return -EINVAL;
rc = vfs_getattr(file->fp->f_vfsmnt, file->fp->f_dentry, &stat);
if (rc)
return rc;
*size = stat.size;
return rc;
} /* kobj_get_filesize() */
EXPORT_SYMBOL(kobj_get_filesize);
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