Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* -*- mode: c; c-basic-offset: 8; -*-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * vim: noexpandtab sw=8 ts=8 sts=0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *  linux/cluster/ssi/cfs/symlink.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *	This program is free software; you can redistribute it and/or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *	modify it under the terms of the GNU General Public License as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *	published by the Free Software Foundation; either version 2 of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *	the License, or (at your option) any later version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  *	This program is distributed in the hope that it will be useful,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  *	but WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  *	MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  *	or NON INFRINGEMENT.  See the GNU General Public License for more
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  *	details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  * 	You should have received a copy of the GNU General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  * 	along with this program; if not, write to the Free Software
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  * 	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)  *	Questions/Comments/Bugfixes to ssic-linux-devel@lists.sourceforge.net
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  *  Copyright (C) 1992  Rick Sladkey
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  *  Optimization changes Copyright (C) 1994 Florian La Roche
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)  *  Jun 7 1999, cache symlink lookups in the page cache.  -DaveM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)  *  Portions Copyright (C) 2001 Compaq Computer Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)  *  ocfs2 symlink handling code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)  *  Copyright (C) 2004, 2005 Oracle.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <linux/namei.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <cluster/masklog.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include "ocfs2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include "alloc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include "file.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include "inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include "journal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include "symlink.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include "xattr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include "buffer_head_io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static int ocfs2_fast_symlink_readpage(struct file *unused, struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	struct inode *inode = page->mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	struct buffer_head *bh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	int status = ocfs2_read_inode_block(inode, &bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	struct ocfs2_dinode *fe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	const char *link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	void *kaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	if (status < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		mlog_errno(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 		return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	fe = (struct ocfs2_dinode *) bh->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	link = (char *) fe->id2.i_symlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	/* will be less than a page size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	len = strnlen(link, ocfs2_fast_symlink_chars(inode->i_sb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	kaddr = kmap_atomic(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	memcpy(kaddr, link, len + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	kunmap_atomic(kaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	SetPageUptodate(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) const struct address_space_operations ocfs2_fast_symlink_aops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 	.readpage		= ocfs2_fast_symlink_readpage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) const struct inode_operations ocfs2_symlink_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) 	.get_link	= page_get_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 	.getattr	= ocfs2_getattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 	.setattr	= ocfs2_setattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 	.listxattr	= ocfs2_listxattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) 	.fiemap		= ocfs2_fiemap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) };