mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-04 02:16:45 +07:00
135 lines
3.7 KiB
C
135 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2005-2019 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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* directory operations
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*/
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#ifndef __AUFS_DIR_H__
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#define __AUFS_DIR_H__
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#ifdef __KERNEL__
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#include <linux/fs.h>
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/* ---------------------------------------------------------------------- */
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/* need to be faster and smaller */
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struct au_nhash {
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unsigned int nh_num;
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struct hlist_head *nh_head;
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};
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struct au_vdir_destr {
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unsigned char len;
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unsigned char name[];
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} __packed;
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struct au_vdir_dehstr {
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struct hlist_node hash;
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struct au_vdir_destr *str;
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struct rcu_head rcu;
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} ____cacheline_aligned_in_smp;
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struct au_vdir_de {
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ino_t de_ino;
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unsigned char de_type;
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/* caution: packed */
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struct au_vdir_destr de_str;
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} __packed;
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struct au_vdir_wh {
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struct hlist_node wh_hash;
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#ifdef CONFIG_AUFS_SHWH
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ino_t wh_ino;
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aufs_bindex_t wh_bindex;
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unsigned char wh_type;
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#else
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aufs_bindex_t wh_bindex;
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#endif
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/* caution: packed */
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struct au_vdir_destr wh_str;
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} __packed;
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union au_vdir_deblk_p {
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unsigned char *deblk;
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struct au_vdir_de *de;
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};
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struct au_vdir {
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unsigned char **vd_deblk;
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unsigned long vd_nblk;
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struct {
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unsigned long ul;
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union au_vdir_deblk_p p;
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} vd_last;
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u64 vd_version;
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unsigned int vd_deblk_sz;
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unsigned long vd_jiffy;
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struct rcu_head rcu;
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} ____cacheline_aligned_in_smp;
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/* ---------------------------------------------------------------------- */
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/* dir.c */
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extern const struct file_operations aufs_dir_fop;
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void au_add_nlink(struct inode *dir, struct inode *h_dir);
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void au_sub_nlink(struct inode *dir, struct inode *h_dir);
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loff_t au_dir_size(struct file *file, struct dentry *dentry);
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void au_dir_ts(struct inode *dir, aufs_bindex_t bsrc);
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int au_test_empty_lower(struct dentry *dentry);
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int au_test_empty(struct dentry *dentry, struct au_nhash *whlist);
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/* vdir.c */
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unsigned int au_rdhash_est(loff_t sz);
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int au_nhash_alloc(struct au_nhash *nhash, unsigned int num_hash, gfp_t gfp);
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void au_nhash_wh_free(struct au_nhash *whlist);
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int au_nhash_test_longer_wh(struct au_nhash *whlist, aufs_bindex_t btgt,
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int limit);
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int au_nhash_test_known_wh(struct au_nhash *whlist, char *name, int nlen);
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int au_nhash_append_wh(struct au_nhash *whlist, char *name, int nlen, ino_t ino,
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unsigned int d_type, aufs_bindex_t bindex,
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unsigned char shwh);
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void au_vdir_free(struct au_vdir *vdir);
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int au_vdir_init(struct file *file);
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int au_vdir_fill_de(struct file *file, struct dir_context *ctx);
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/* ioctl.c */
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long aufs_ioctl_dir(struct file *file, unsigned int cmd, unsigned long arg);
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#ifdef CONFIG_AUFS_RDU
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/* rdu.c */
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long au_rdu_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
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#ifdef CONFIG_COMPAT
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long au_rdu_compat_ioctl(struct file *file, unsigned int cmd,
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unsigned long arg);
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#endif
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#else
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AuStub(long, au_rdu_ioctl, return -EINVAL, struct file *file,
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unsigned int cmd, unsigned long arg)
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#ifdef CONFIG_COMPAT
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AuStub(long, au_rdu_compat_ioctl, return -EINVAL, struct file *file,
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unsigned int cmd, unsigned long arg)
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#endif
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#endif
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#endif /* __KERNEL__ */
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#endif /* __AUFS_DIR_H__ */
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