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60 lines
1.8 KiB
60 lines
1.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2010-2020 Junjiro R. Okajima |
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* |
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* This program, aufs is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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/* |
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* special support for filesystems which acquires an inode mutex |
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* at final closing a file, eg, hfsplus. |
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* |
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* This trick is very simple and stupid, just to open the file before really |
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* necessary open to tell hfsplus that this is not the final closing. |
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* The caller should call au_h_open_pre() after acquiring the inode mutex, |
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* and au_h_open_post() after releasing it. |
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*/ |
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#include "aufs.h" |
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struct file *au_h_open_pre(struct dentry *dentry, aufs_bindex_t bindex, |
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int force_wr) |
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{ |
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struct file *h_file; |
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struct dentry *h_dentry; |
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h_dentry = au_h_dptr(dentry, bindex); |
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AuDebugOn(!h_dentry); |
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AuDebugOn(d_is_negative(h_dentry)); |
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h_file = NULL; |
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if (au_test_hfsplus(h_dentry->d_sb) |
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&& d_is_reg(h_dentry)) |
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h_file = au_h_open(dentry, bindex, |
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O_RDONLY | O_NOATIME | O_LARGEFILE, |
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/*file*/NULL, force_wr); |
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return h_file; |
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} |
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void au_h_open_post(struct dentry *dentry, aufs_bindex_t bindex, |
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struct file *h_file) |
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{ |
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struct au_branch *br; |
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if (h_file) { |
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fput(h_file); |
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br = au_sbr(dentry->d_sb, bindex); |
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au_lcnt_dec(&br->br_nfiles); |
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} |
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}
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