Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  linux/fs/sysv/inode.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  minix/inode.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *  Copyright (C) 1991, 1992  Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *  xenix/inode.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *  Copyright (C) 1992  Doug Evans
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *  coh/inode.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *  Copyright (C) 1993  Pascal Haible, Bruno Haible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *  sysv/inode.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *  Copyright (C) 1993  Paul B. Monday
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *  sysv/inode.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *  Copyright (C) 1993  Bruno Haible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  *  Copyright (C) 1997, 1998  Krzysztof G. Baranowski
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  *  This file contains code for allocating/freeing inodes and for read/writing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  *  the superblock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/highuid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/writeback.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <linux/namei.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include <asm/byteorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include "sysv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static int sysv_sync_fs(struct super_block *sb, int wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	struct sysv_sb_info *sbi = SYSV_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	u32 time = (u32)ktime_get_real_seconds(), old_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	mutex_lock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	 * If we are going to write out the super block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	 * then attach current time stamp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	 * But if the filesystem was marked clean, keep it clean.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	old_time = fs32_to_cpu(sbi, *sbi->s_sb_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	if (sbi->s_type == FSTYPE_SYSV4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38u - old_time))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 			*sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38u - time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		*sbi->s_sb_time = cpu_to_fs32(sbi, time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		mark_buffer_dirty(sbi->s_bh2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	mutex_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) static int sysv_remount(struct super_block *sb, int *flags, char *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct sysv_sb_info *sbi = SYSV_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	sync_filesystem(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	if (sbi->s_forced_ro)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		*flags |= SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) static void sysv_put_super(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	struct sysv_sb_info *sbi = SYSV_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	if (!sb_rdonly(sb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		/* XXX ext2 also updates the state here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		mark_buffer_dirty(sbi->s_bh1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		if (sbi->s_bh1 != sbi->s_bh2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 			mark_buffer_dirty(sbi->s_bh2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	brelse(sbi->s_bh1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	if (sbi->s_bh1 != sbi->s_bh2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		brelse(sbi->s_bh2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	kfree(sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) static int sysv_statfs(struct dentry *dentry, struct kstatfs *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	struct super_block *sb = dentry->d_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	struct sysv_sb_info *sbi = SYSV_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	buf->f_type = sb->s_magic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	buf->f_bsize = sb->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	buf->f_blocks = sbi->s_ndatazones;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	buf->f_bavail = buf->f_bfree = sysv_count_free_blocks(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	buf->f_files = sbi->s_ninodes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	buf->f_ffree = sysv_count_free_inodes(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	buf->f_namelen = SYSV_NAMELEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	buf->f_fsid = u64_to_fsid(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)  * NXI <-> N0XI for PDP, XIN <-> XIN0 for le32, NIX <-> 0NIX for be32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static inline void read3byte(struct sysv_sb_info *sbi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	unsigned char * from, unsigned char * to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	if (sbi->s_bytesex == BYTESEX_PDP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		to[0] = from[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		to[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		to[2] = from[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		to[3] = from[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	} else if (sbi->s_bytesex == BYTESEX_LE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		to[0] = from[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		to[1] = from[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		to[2] = from[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		to[3] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		to[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		to[1] = from[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		to[2] = from[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		to[3] = from[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static inline void write3byte(struct sysv_sb_info *sbi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	unsigned char * from, unsigned char * to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (sbi->s_bytesex == BYTESEX_PDP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		to[0] = from[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		to[1] = from[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		to[2] = from[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	} else if (sbi->s_bytesex == BYTESEX_LE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		to[0] = from[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		to[1] = from[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		to[2] = from[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		to[0] = from[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		to[1] = from[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		to[2] = from[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static const struct inode_operations sysv_symlink_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	.get_link	= page_get_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	.getattr	= sysv_getattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) void sysv_set_inode(struct inode *inode, dev_t rdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	if (S_ISREG(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		inode->i_op = &sysv_file_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		inode->i_fop = &sysv_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		inode->i_mapping->a_ops = &sysv_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	} else if (S_ISDIR(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		inode->i_op = &sysv_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		inode->i_fop = &sysv_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		inode->i_mapping->a_ops = &sysv_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	} else if (S_ISLNK(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		inode->i_op = &sysv_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		inode_nohighmem(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		inode->i_mapping->a_ops = &sysv_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		init_special_inode(inode, inode->i_mode, rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct inode *sysv_iget(struct super_block *sb, unsigned int ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	struct sysv_sb_info * sbi = SYSV_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	struct buffer_head * bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	struct sysv_inode * raw_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	struct sysv_inode_info * si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	unsigned int block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	if (!ino || ino > sbi->s_ninodes) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		printk("Bad inode number on dev %s: %d is out of range\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		       sb->s_id, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	inode = iget_locked(sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	if (!(inode->i_state & I_NEW))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	raw_inode = sysv_raw_inode(sb, ino, &bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	if (!raw_inode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		printk("Major problem: unable to read inode from dev %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		       inode->i_sb->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		goto bad_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	/* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	inode->i_mode = fs16_to_cpu(sbi, raw_inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	i_uid_write(inode, (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	i_gid_write(inode, (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	set_nlink(inode, fs16_to_cpu(sbi, raw_inode->i_nlink));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	inode->i_size = fs32_to_cpu(sbi, raw_inode->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_atime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_mtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_ctime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	inode->i_ctime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	inode->i_atime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	inode->i_mtime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	inode->i_blocks = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	si = SYSV_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	for (block = 0; block < 10+1+1+1; block++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		read3byte(sbi, &raw_inode->i_data[3*block],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 				(u8 *)&si->i_data[block]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	si->i_dir_start_lookup = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		sysv_set_inode(inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			       old_decode_dev(fs32_to_cpu(sbi, si->i_data[0])));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		sysv_set_inode(inode, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	unlock_new_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) bad_inode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	iget_failed(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static int __sysv_write_inode(struct inode *inode, int wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	struct super_block * sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	struct sysv_sb_info * sbi = SYSV_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	struct buffer_head * bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	struct sysv_inode * raw_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	struct sysv_inode_info * si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	unsigned int ino, block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	ino = inode->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	if (!ino || ino > sbi->s_ninodes) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		printk("Bad inode number on dev %s: %d is out of range\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		       inode->i_sb->s_id, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	raw_inode = sysv_raw_inode(sb, ino, &bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	if (!raw_inode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		printk("unable to read i-node block\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	raw_inode->i_mode = cpu_to_fs16(sbi, inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	raw_inode->i_uid = cpu_to_fs16(sbi, fs_high2lowuid(i_uid_read(inode)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(i_gid_read(inode)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	raw_inode->i_nlink = cpu_to_fs16(sbi, inode->i_nlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	raw_inode->i_size = cpu_to_fs32(sbi, inode->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	raw_inode->i_atime = cpu_to_fs32(sbi, inode->i_atime.tv_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	raw_inode->i_mtime = cpu_to_fs32(sbi, inode->i_mtime.tv_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	raw_inode->i_ctime = cpu_to_fs32(sbi, inode->i_ctime.tv_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	si = SYSV_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		si->i_data[0] = cpu_to_fs32(sbi, old_encode_dev(inode->i_rdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	for (block = 0; block < 10+1+1+1; block++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		write3byte(sbi, (u8 *)&si->i_data[block],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 			&raw_inode->i_data[3*block]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	mark_buffer_dirty(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	if (wait) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)                 sync_dirty_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)                 if (buffer_req(bh) && !buffer_uptodate(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)                         printk ("IO error syncing sysv inode [%s:%08x]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)                                 sb->s_id, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)                         err = -EIO;
^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) 	brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) int sysv_write_inode(struct inode *inode, struct writeback_control *wbc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	return __sysv_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) int sysv_sync_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	return __sysv_write_inode(inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) static void sysv_evict_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	truncate_inode_pages_final(&inode->i_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	if (!inode->i_nlink) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		inode->i_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		sysv_truncate(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	invalidate_inode_buffers(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	clear_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	if (!inode->i_nlink)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		sysv_free_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static struct kmem_cache *sysv_inode_cachep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) static struct inode *sysv_alloc_inode(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	struct sysv_inode_info *si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	si = kmem_cache_alloc(sysv_inode_cachep, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	if (!si)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	return &si->vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static void sysv_free_in_core_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) static void init_once(void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	struct sysv_inode_info *si = (struct sysv_inode_info *)p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	inode_init_once(&si->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) const struct super_operations sysv_sops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	.alloc_inode	= sysv_alloc_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	.free_inode	= sysv_free_in_core_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	.write_inode	= sysv_write_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	.evict_inode	= sysv_evict_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	.put_super	= sysv_put_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	.sync_fs	= sysv_sync_fs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	.remount_fs	= sysv_remount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	.statfs		= sysv_statfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) int __init sysv_init_icache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	sysv_inode_cachep = kmem_cache_create("sysv_inode_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 			sizeof(struct sysv_inode_info), 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 			SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|SLAB_ACCOUNT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 			init_once);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	if (!sysv_inode_cachep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) void sysv_destroy_icache(void)
^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) 	 * Make sure all delayed rcu free inodes are flushed before we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	 * destroy cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	rcu_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	kmem_cache_destroy(sysv_inode_cachep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }