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)  *	fs/bfs/inode.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *	BFS superblock and inode operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *	Copyright (C) 1999-2018 Tigran Aivazian <aivazian.tigran@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *	From fs/minix, Copyright (C) 1991, 1992 Linus Torvalds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *	Made endianness-clean by Andrew Stribblehill <ads@wompom.org>, 2005.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/writeback.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/uio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include "bfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) MODULE_AUTHOR("Tigran Aivazian <aivazian.tigran@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) MODULE_DESCRIPTION("SCO UnixWare BFS filesystem for Linux");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #undef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define dprintf(x...)	printf(x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define dprintf(x...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) struct inode *bfs_iget(struct super_block *sb, unsigned long ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	struct bfs_inode *di;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	int block, off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	inode = iget_locked(sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	if (!(inode->i_state & I_NEW))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(inode->i_sb)->si_lasti)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		printf("Bad inode number %s:%08lx\n", inode->i_sb->s_id, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	bh = sb_bread(inode->i_sb, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	if (!bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 									ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	di = (struct bfs_inode *)bh->b_data + off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	inode->i_mode = 0x0000FFFF & le32_to_cpu(di->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	if (le32_to_cpu(di->i_vtype) == BFS_VDIR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		inode->i_mode |= S_IFDIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		inode->i_op = &bfs_dir_inops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		inode->i_fop = &bfs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	} else if (le32_to_cpu(di->i_vtype) == BFS_VREG) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		inode->i_mode |= S_IFREG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		inode->i_op = &bfs_file_inops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		inode->i_fop = &bfs_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		inode->i_mapping->a_ops = &bfs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	BFS_I(inode)->i_sblock =  le32_to_cpu(di->i_sblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	BFS_I(inode)->i_eblock =  le32_to_cpu(di->i_eblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	BFS_I(inode)->i_dsk_ino = le16_to_cpu(di->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	i_uid_write(inode, le32_to_cpu(di->i_uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	i_gid_write(inode,  le32_to_cpu(di->i_gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	set_nlink(inode, le32_to_cpu(di->i_nlink));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	inode->i_size = BFS_FILESIZE(di);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	inode->i_blocks = BFS_FILEBLOCKS(di);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	inode->i_atime.tv_sec =  le32_to_cpu(di->i_atime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	inode->i_mtime.tv_sec =  le32_to_cpu(di->i_mtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	inode->i_ctime.tv_sec =  le32_to_cpu(di->i_ctime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	inode->i_atime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	inode->i_mtime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	inode->i_ctime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	unlock_new_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	iget_failed(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static struct bfs_inode *find_inode(struct super_block *sb, u16 ino, struct buffer_head **p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(sb)->si_lasti)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		printf("Bad inode number %s:%08x\n", sb->s_id, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	ino -= BFS_ROOT_INO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	*p = sb_bread(sb, 1 + ino / BFS_INODES_PER_BLOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if (!*p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		printf("Unable to read inode %s:%08x\n", sb->s_id, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	return (struct bfs_inode *)(*p)->b_data +  ino % BFS_INODES_PER_BLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static int bfs_write_inode(struct inode *inode, struct writeback_control *wbc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	struct bfs_sb_info *info = BFS_SB(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	unsigned int ino = (u16)inode->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	unsigned long i_sblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	struct bfs_inode *di;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	dprintf("ino=%08x\n", ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	di = find_inode(inode->i_sb, ino, &bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	if (IS_ERR(di))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		return PTR_ERR(di);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	mutex_lock(&info->bfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	if (ino == BFS_ROOT_INO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		di->i_vtype = cpu_to_le32(BFS_VDIR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		di->i_vtype = cpu_to_le32(BFS_VREG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	di->i_ino = cpu_to_le16(ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	di->i_mode = cpu_to_le32(inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	di->i_uid = cpu_to_le32(i_uid_read(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	di->i_gid = cpu_to_le32(i_gid_read(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	di->i_nlink = cpu_to_le32(inode->i_nlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	di->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	di->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	di->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	i_sblock = BFS_I(inode)->i_sblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	di->i_sblock = cpu_to_le32(i_sblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	di->i_eblock = cpu_to_le32(BFS_I(inode)->i_eblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	di->i_eoffset = cpu_to_le32(i_sblock * BFS_BSIZE + inode->i_size - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	mark_buffer_dirty(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	if (wbc->sync_mode == WB_SYNC_ALL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		sync_dirty_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		if (buffer_req(bh) && !buffer_uptodate(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	mutex_unlock(&info->bfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static void bfs_evict_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	unsigned long ino = inode->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	struct bfs_inode *di;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	struct super_block *s = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	struct bfs_sb_info *info = BFS_SB(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	struct bfs_inode_info *bi = BFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	dprintf("ino=%08lx\n", ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	truncate_inode_pages_final(&inode->i_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	invalidate_inode_buffers(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	clear_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	if (inode->i_nlink)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	di = find_inode(s, inode->i_ino, &bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	if (IS_ERR(di))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	mutex_lock(&info->bfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	/* clear on-disk inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	memset(di, 0, sizeof(struct bfs_inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	mark_buffer_dirty(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	if (bi->i_dsk_ino) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		if (bi->i_sblock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			info->si_freeb += bi->i_eblock + 1 - bi->i_sblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		info->si_freei++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		clear_bit(ino, info->si_imap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		bfs_dump_imap("evict_inode", s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	 * If this was the last file, make the previous block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	 * "last block of the last file" even if there is no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	 * real file there, saves us 1 gap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	if (info->si_lf_eblk == bi->i_eblock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		info->si_lf_eblk = bi->i_sblock - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	mutex_unlock(&info->bfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static void bfs_put_super(struct super_block *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	struct bfs_sb_info *info = BFS_SB(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	mutex_destroy(&info->bfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	s->s_fs_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	struct super_block *s = dentry->d_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	struct bfs_sb_info *info = BFS_SB(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	u64 id = huge_encode_dev(s->s_bdev->bd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	buf->f_type = BFS_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	buf->f_bsize = s->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	buf->f_blocks = info->si_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	buf->f_bfree = buf->f_bavail = info->si_freeb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	buf->f_files = info->si_lasti + 1 - BFS_ROOT_INO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	buf->f_ffree = info->si_freei;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	buf->f_fsid = u64_to_fsid(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	buf->f_namelen = BFS_NAMELEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static struct kmem_cache *bfs_inode_cachep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static struct inode *bfs_alloc_inode(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	struct bfs_inode_info *bi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	bi = kmem_cache_alloc(bfs_inode_cachep, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	if (!bi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	return &bi->vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static void bfs_free_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	kmem_cache_free(bfs_inode_cachep, BFS_I(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static void init_once(void *foo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	struct bfs_inode_info *bi = foo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	inode_init_once(&bi->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static int __init init_inodecache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	bfs_inode_cachep = kmem_cache_create("bfs_inode_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 					     sizeof(struct bfs_inode_info),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 					     0, (SLAB_RECLAIM_ACCOUNT|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 						SLAB_MEM_SPREAD|SLAB_ACCOUNT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 					     init_once);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	if (bfs_inode_cachep == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) static void destroy_inodecache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	 * Make sure all delayed rcu free inodes are flushed before we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	 * destroy cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	rcu_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	kmem_cache_destroy(bfs_inode_cachep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) static const struct super_operations bfs_sops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	.alloc_inode	= bfs_alloc_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	.free_inode	= bfs_free_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	.write_inode	= bfs_write_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	.evict_inode	= bfs_evict_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	.put_super	= bfs_put_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	.statfs		= bfs_statfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) void bfs_dump_imap(const char *prefix, struct super_block *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	char *tmpbuf = (char *)get_zeroed_page(GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	if (!tmpbuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	for (i = BFS_SB(s)->si_lasti; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		if (i > PAGE_SIZE - 100) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		if (test_bit(i, BFS_SB(s)->si_imap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			strcat(tmpbuf, "1");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 			strcat(tmpbuf, "0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	printf("%s: lasti=%08lx <%s>\n", prefix, BFS_SB(s)->si_lasti, tmpbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	free_page((unsigned long)tmpbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) static int bfs_fill_super(struct super_block *s, void *data, int silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	struct buffer_head *bh, *sbh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	struct bfs_super_block *bfs_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	unsigned i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	struct bfs_sb_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	int ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	unsigned long i_sblock, i_eblock, i_eoff, s_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	info = kzalloc(sizeof(*info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	mutex_init(&info->bfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	s->s_fs_info = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	s->s_time_min = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	s->s_time_max = U32_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	sb_set_blocksize(s, BFS_BSIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	sbh = sb_bread(s, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	if (!sbh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	bfs_sb = (struct bfs_super_block *)sbh->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	if (le32_to_cpu(bfs_sb->s_magic) != BFS_MAGIC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 			printf("No BFS filesystem on %s (magic=%08x)\n", s->s_id,  le32_to_cpu(bfs_sb->s_magic));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	if (BFS_UNCLEAN(bfs_sb, s) && !silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		printf("%s is unclean, continuing\n", s->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	s->s_magic = BFS_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	if (le32_to_cpu(bfs_sb->s_start) > le32_to_cpu(bfs_sb->s_end) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	    le32_to_cpu(bfs_sb->s_start) < sizeof(struct bfs_super_block) + sizeof(struct bfs_dirent)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		printf("Superblock is corrupted on %s\n", s->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	info->si_lasti = (le32_to_cpu(bfs_sb->s_start) - BFS_BSIZE) / sizeof(struct bfs_inode) + BFS_ROOT_INO - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	if (info->si_lasti == BFS_MAX_LASTI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		printf("NOTE: filesystem %s was created with 512 inodes, the real maximum is 511, mounting anyway\n", s->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	else if (info->si_lasti > BFS_MAX_LASTI) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		printf("Impossible last inode number %lu > %d on %s\n", info->si_lasti, BFS_MAX_LASTI, s->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	for (i = 0; i < BFS_ROOT_INO; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 		set_bit(i, info->si_imap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	s->s_op = &bfs_sops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	inode = bfs_iget(s, BFS_ROOT_INO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	if (IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		ret = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	s->s_root = d_make_root(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	if (!s->s_root) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 		ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 		goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	info->si_blocks = (le32_to_cpu(bfs_sb->s_end) + 1) >> BFS_BSIZE_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	info->si_freeb = (le32_to_cpu(bfs_sb->s_end) + 1 - le32_to_cpu(bfs_sb->s_start)) >> BFS_BSIZE_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	info->si_freei = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	info->si_lf_eblk = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	/* can we read the last block? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	bh = sb_bread(s, info->si_blocks - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	if (!bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		printf("Last block not available on %s: %lu\n", s->s_id, info->si_blocks - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 		ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 		goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	bh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	for (i = BFS_ROOT_INO; i <= info->si_lasti; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 		struct bfs_inode *di;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 		int block = (i - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 		int off = (i - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 		unsigned long eblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 		if (!off) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 			brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 			bh = sb_bread(s, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 		if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 		di = (struct bfs_inode *)bh->b_data + off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 		/* test if filesystem is not corrupted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 		i_eoff = le32_to_cpu(di->i_eoffset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 		i_sblock = le32_to_cpu(di->i_sblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 		i_eblock = le32_to_cpu(di->i_eblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 		s_size = le32_to_cpu(bfs_sb->s_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 		if (i_sblock > info->si_blocks ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 			i_eblock > info->si_blocks ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 			i_sblock > i_eblock ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 			(i_eoff != le32_to_cpu(-1) && i_eoff > s_size) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 			i_sblock * BFS_BSIZE > i_eoff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 			printf("Inode 0x%08x corrupted on %s\n", i, s->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 			brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 			ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 			goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 		if (!di->i_ino) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 			info->si_freei++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 		set_bit(i, info->si_imap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 		info->si_freeb -= BFS_FILEBLOCKS(di);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		eblock =  le32_to_cpu(di->i_eblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 		if (eblock > info->si_lf_eblk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 			info->si_lf_eblk = eblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 	brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	brelse(sbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	bfs_dump_imap("fill_super", s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) out2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 	dput(s->s_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	s->s_root = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) out1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	brelse(sbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 	mutex_destroy(&info->bfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 	s->s_fs_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) static struct dentry *bfs_mount(struct file_system_type *fs_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	int flags, const char *dev_name, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 	return mount_bdev(fs_type, flags, dev_name, data, bfs_fill_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) static struct file_system_type bfs_fs_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 	.owner		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 	.name		= "bfs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	.mount		= bfs_mount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	.kill_sb	= kill_block_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	.fs_flags	= FS_REQUIRES_DEV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) MODULE_ALIAS_FS("bfs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) static int __init init_bfs_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 	int err = init_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 		goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 	err = register_filesystem(&bfs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	destroy_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) out1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) static void __exit exit_bfs_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 	unregister_filesystem(&bfs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 	destroy_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) module_init(init_bfs_fs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) module_exit(exit_bfs_fs)