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/ufs/util.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 1998
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Daniel Pirkl <daniel.pirkl@email.cz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Charles University, Faculty of Mathematics and Physics
^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/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "ufs_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "ufs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "swab.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "util.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) struct ufs_buffer_head * _ubh_bread_ (struct ufs_sb_private_info * uspi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	struct super_block *sb, u64 fragment, u64 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	struct ufs_buffer_head * ubh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	unsigned i, j ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	u64  count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	if (size & ~uspi->s_fmask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	count = size >> uspi->s_fshift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	if (count > UFS_MAXFRAG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	ubh = kmalloc (sizeof (struct ufs_buffer_head), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (!ubh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	ubh->fragment = fragment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	ubh->count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	for (i = 0; i < count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		if (!(ubh->bh[i] = sb_bread(sb, fragment + i)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 			goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	for (; i < UFS_MAXFRAG; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		ubh->bh[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	return ubh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	for (j = 0; j < i; j++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		brelse (ubh->bh[j]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	kfree(ubh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) struct ufs_buffer_head * ubh_bread_uspi (struct ufs_sb_private_info * uspi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct super_block *sb, u64 fragment, u64 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	unsigned i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	u64 count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	if (size & ~uspi->s_fmask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	count = size >> uspi->s_fshift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	if (count <= 0 || count > UFS_MAXFRAG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	USPI_UBH(uspi)->fragment = fragment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	USPI_UBH(uspi)->count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	for (i = 0; i < count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		if (!(USPI_UBH(uspi)->bh[i] = sb_bread(sb, fragment + i)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 			goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	for (; i < UFS_MAXFRAG; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		USPI_UBH(uspi)->bh[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	return USPI_UBH(uspi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	for (j = 0; j < i; j++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		brelse (USPI_UBH(uspi)->bh[j]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	return NULL;
^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) void ubh_brelse (struct ufs_buffer_head * ubh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	unsigned i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (!ubh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	for (i = 0; i < ubh->count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		brelse (ubh->bh[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	kfree (ubh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) void ubh_brelse_uspi (struct ufs_sb_private_info * uspi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	unsigned i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (!USPI_UBH(uspi))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	for ( i = 0; i < USPI_UBH(uspi)->count; i++ ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		brelse (USPI_UBH(uspi)->bh[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		USPI_UBH(uspi)->bh[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) void ubh_mark_buffer_dirty (struct ufs_buffer_head * ubh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	unsigned i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	if (!ubh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	for ( i = 0; i < ubh->count; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		mark_buffer_dirty (ubh->bh[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) void ubh_mark_buffer_uptodate (struct ufs_buffer_head * ubh, int flag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	unsigned i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	if (!ubh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	if (flag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		for ( i = 0; i < ubh->count; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 			set_buffer_uptodate (ubh->bh[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		for ( i = 0; i < ubh->count; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 			clear_buffer_uptodate (ubh->bh[i]);
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) void ubh_sync_block(struct ufs_buffer_head *ubh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (ubh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		unsigned i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		for (i = 0; i < ubh->count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			write_dirty_buffer(ubh->bh[i], 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		for (i = 0; i < ubh->count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			wait_on_buffer(ubh->bh[i]);
^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) void ubh_bforget (struct ufs_buffer_head * ubh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	unsigned i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (!ubh) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	for ( i = 0; i < ubh->count; i++ ) if ( ubh->bh[i] ) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		bforget (ubh->bh[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)  
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int ubh_buffer_dirty (struct ufs_buffer_head * ubh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	unsigned i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	unsigned result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	if (!ubh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	for ( i = 0; i < ubh->count; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		result |= buffer_dirty(ubh->bh[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) void _ubh_ubhcpymem_(struct ufs_sb_private_info * uspi, 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	unsigned char * mem, struct ufs_buffer_head * ubh, unsigned size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	unsigned len, bhno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	if (size > (ubh->count << uspi->s_fshift))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		size = ubh->count << uspi->s_fshift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	bhno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	while (size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		len = min_t(unsigned int, size, uspi->s_fsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		memcpy (mem, ubh->bh[bhno]->b_data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		mem += uspi->s_fsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		size -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		bhno++;
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) void _ubh_memcpyubh_(struct ufs_sb_private_info * uspi, 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	struct ufs_buffer_head * ubh, unsigned char * mem, unsigned size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	unsigned len, bhno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (size > (ubh->count << uspi->s_fshift))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		size = ubh->count << uspi->s_fshift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	bhno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	while (size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		len = min_t(unsigned int, size, uspi->s_fsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		memcpy (ubh->bh[bhno]->b_data, mem, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		mem += uspi->s_fsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		size -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		bhno++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) dev_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) ufs_get_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	__u32 fs32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	dev_t dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		fs32 = fs32_to_cpu(sb, ufsi->i_u1.i_data[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		fs32 = fs32_to_cpu(sb, ufsi->i_u1.i_data[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	case UFS_ST_SUNx86:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	case UFS_ST_SUN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		if ((fs32 & 0xffff0000) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		    (fs32 & 0xffff0000) == 0xffff0000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			dev = old_decode_dev(fs32 & 0x7fff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 			dev = MKDEV(sysv_major(fs32), sysv_minor(fs32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		dev = old_decode_dev(fs32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	return dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) ufs_set_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi, dev_t dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	__u32 fs32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	case UFS_ST_SUNx86:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	case UFS_ST_SUN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		fs32 = sysv_encode_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		if ((fs32 & 0xffff8000) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			fs32 = old_encode_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		fs32 = old_encode_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		ufsi->i_u1.i_data[1] = cpu_to_fs32(sb, fs32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		ufsi->i_u1.i_data[0] = cpu_to_fs32(sb, fs32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)  * ufs_get_locked_page() - locate, pin and lock a pagecache page, if not exist
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)  * read it from disk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)  * @mapping: the address_space to search
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)  * @index: the page index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)  * Locates the desired pagecache page, if not exist we'll read it,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  * locks it, increments its reference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)  * count and returns its address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) struct page *ufs_get_locked_page(struct address_space *mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 				 pgoff_t index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	struct inode *inode = mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	struct page *page = find_lock_page(mapping, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (!page) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		page = read_mapping_page(mapping, index, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		if (IS_ERR(page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 			printk(KERN_ERR "ufs_change_blocknr: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 			       "read_mapping_page error: ino %lu, index: %lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 			       mapping->host->i_ino, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 			return page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		lock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		if (unlikely(page->mapping == NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 			/* Truncate got there first */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 			unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 			put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 			return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		if (!PageUptodate(page) || PageError(page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 			unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 			put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 			printk(KERN_ERR "ufs_change_blocknr: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 			       "can not read page: ino %lu, index: %lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 			       inode->i_ino, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 			return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	if (!page_has_buffers(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		create_empty_buffers(page, 1 << inode->i_blkbits, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	return page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }