Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #ifndef __DIR_DOT_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #define __DIR_DOT_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/dcache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/crc32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) struct inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) struct gfs2_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct gfs2_inum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) struct buffer_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct gfs2_dirent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct gfs2_diradd {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	unsigned nr_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	struct gfs2_dirent *dent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	int save_loc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) extern struct inode *gfs2_dir_search(struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 				     const struct qstr *filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 				     bool fail_on_exist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) extern int gfs2_dir_check(struct inode *dir, const struct qstr *filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 			  const struct gfs2_inode *ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) extern int gfs2_dir_add(struct inode *inode, const struct qstr *filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 			const struct gfs2_inode *ip, struct gfs2_diradd *da);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static inline void gfs2_dir_no_add(struct gfs2_diradd *da)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	brelse(da->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	da->bh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) extern int gfs2_dir_del(struct gfs2_inode *dip, const struct dentry *dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) extern int gfs2_dir_read(struct inode *inode, struct dir_context *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 			 struct file_ra_state *f_ra);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) extern int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 			  const struct gfs2_inode *nip, unsigned int new_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) extern int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) extern int gfs2_diradd_alloc_required(struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 				      const struct qstr *filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 				      struct gfs2_diradd *da);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) extern int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 				   struct buffer_head **bhp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) extern void gfs2_dir_hash_inval(struct gfs2_inode *ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static inline u32 gfs2_disk_hash(const char *data, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)         return crc32_le((u32)~0, data, len) ^ (u32)~0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static inline void gfs2_str2qstr(struct qstr *name, const char *fname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	name->name = fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	name->len = strlen(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	name->hash = gfs2_disk_hash(name->name, name->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* N.B. This probably ought to take inum & type as args as well */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static inline void gfs2_qstr2dirent(const struct qstr *name, u16 reclen, struct gfs2_dirent *dent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	dent->de_inum.no_addr = cpu_to_be64(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	dent->de_inum.no_formal_ino = cpu_to_be64(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	dent->de_hash = cpu_to_be32(name->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	dent->de_rec_len = cpu_to_be16(reclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	dent->de_name_len = cpu_to_be16(name->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	dent->de_type = cpu_to_be16(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	memset(dent->__pad, 0, sizeof(dent->__pad));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	memcpy(dent + 1, name->name, name->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) extern struct qstr gfs2_qdot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) extern struct qstr gfs2_qdotdot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #endif /* __DIR_DOT_H__ */