/*
* after branch manipulating, refresh the file.
*/
static int refresh_file(struct file *file, int (*reopen)(struct file *file))
{
int err, need_reopen;
struct dentry *dentry;
aufs_bindex_t bend, bindex;
dentry = file->f_dentry;
err = au_fi_realloc(au_fi(file), au_sbend(dentry->d_sb) + 1);
if (unlikely(err))
goto out;
au_do_refresh_file(file);
err = 0;
need_reopen = 1;
if (!au_test_mmapped(file))
err = au_file_refresh_by_inode(file, &need_reopen);
if (!err && need_reopen && !d_unhashed(dentry))
err = reopen(file);
if (!err) {
au_update_figen(file);
return 0; /* success */
}
/* error, close all lower files */
bend = au_fbend(file);
for (bindex = au_fbstart(file); bindex <= bend; bindex++)
au_set_h_fptr(file, bindex, NULL);
out:
return err;
}
int au_reopen_nondir(struct file *file)
{
int err;
aufs_bindex_t bstart, bindex, bend;
struct dentry *dentry;
struct file *h_file, *h_file_tmp;
dentry = file->f_dentry;
AuDebugOn(au_special_file(dentry->d_inode->i_mode));
bstart = au_dbstart(dentry);
h_file_tmp = NULL;
if (au_fbstart(file) == bstart) {
h_file = au_h_fptr(file, bstart);
if (file->f_mode == h_file->f_mode)
return 0; /* success */
h_file_tmp = h_file;
get_file(h_file_tmp);
au_set_h_fptr(file, bstart, NULL);
}
AuDebugOn(au_fbstart(file) < bstart
|| au_fi(file)->fi_hfile[0 + bstart].hf_file);
h_file = au_h_open(dentry, bstart, vfsub_file_flags(file) & ~O_TRUNC,
file);
err = PTR_ERR(h_file);
if (IS_ERR(h_file))
goto out; /* todo: close all? */
err = 0;
au_set_fbstart(file, bstart);
au_set_h_fptr(file, bstart, h_file);
au_update_figen(file);
/* todo: necessary? */
/* file->f_ra = h_file->f_ra; */
/* close lower files */
bend = au_fbend(file);
for (bindex = bstart + 1; bindex <= bend; bindex++)
au_set_h_fptr(file, bindex, NULL);
au_set_fbend(file, bstart);
out:
if (h_file_tmp)
fput(h_file_tmp);
return err;
}
void au_finfo_fin(struct file *file)
{
struct au_finfo *finfo;
aufs_bindex_t bindex, bend;
fi_write_lock(file);
bend = au_fbend(file);
bindex = au_fbstart(file);
if (bindex >= 0)
/*
* calls fput() instead of filp_close(),
* since no dnotify or lock for the lower file.
*/
for (; bindex <= bend; bindex++)
au_set_h_fptr(file, bindex, NULL);
finfo = au_fi(file);
au_dbg_verify_hf(finfo);
kfree(finfo->fi_hfile);
fi_write_unlock(file);
AuRwDestroy(&finfo->fi_rwsem);
au_cache_free_finfo(finfo);
}
