^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/hfsplus/wrapper.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Brad Boyer (flar@allandria.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * (C) 2003 Ardis Technologies <roman@ardistech.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Handling of HFS wrappers around HFS+ volumes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/cdrom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/genhd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "hfsplus_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "hfsplus_raw.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct hfsplus_wd {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) u32 ablk_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) u16 ablk_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) u16 embed_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) u16 embed_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * hfsplus_submit_bio - Perform block I/O
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * @sb: super block of volume for I/O
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * @sector: block to read or write, for blocks of HFSPLUS_SECTOR_SIZE bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * @buf: buffer for I/O
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * @data: output pointer for location of requested data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * @op: direction of I/O
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * @op_flags: request op flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * The unit of I/O is hfsplus_min_io_size(sb), which may be bigger than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * HFSPLUS_SECTOR_SIZE, and @buf must be sized accordingly. On reads
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * @data will return a pointer to the start of the requested sector,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * which may not be the same location as @buf.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * If @sector is not aligned to the bdev logical block size it will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * be rounded down. For writes this means that @buf should contain data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * that starts at the rounded-down address. As long as the data was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * read using hfsplus_submit_bio() and the same buffer is used things
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * will work correctly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int hfsplus_submit_bio(struct super_block *sb, sector_t sector,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) void *buf, void **data, int op, int op_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct bio *bio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u64 io_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) loff_t start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) int offset;
^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) * Align sector to hardware sector size and find offset. We
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * assume that io_size is a power of two, which _should_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * be true.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) io_size = hfsplus_min_io_size(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) start = (loff_t)sector << HFSPLUS_SECTOR_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) offset = start & (io_size - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) sector &= ~((io_size >> HFSPLUS_SECTOR_SHIFT) - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) bio = bio_alloc(GFP_NOIO, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) bio->bi_iter.bi_sector = sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) bio_set_dev(bio, sb->s_bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) bio_set_op_attrs(bio, op, op_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (op != WRITE && data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) *data = (u8 *)buf + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) while (io_size > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) unsigned int page_offset = offset_in_page(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) unsigned int len = min_t(unsigned int, PAGE_SIZE - page_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) io_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) ret = bio_add_page(bio, virt_to_page(buf), len, page_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (ret != len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) io_size -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) buf = (u8 *)buf + len;
^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) ret = submit_bio_wait(bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) bio_put(bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return ret < 0 ? ret : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static int hfsplus_read_mdb(void *bufptr, struct hfsplus_wd *wd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) u32 extent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) u16 attrib;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) __be16 sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) sig = *(__be16 *)(bufptr + HFSP_WRAPOFF_EMBEDSIG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (sig != cpu_to_be16(HFSPLUS_VOLHEAD_SIG) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) sig != cpu_to_be16(HFSPLUS_VOLHEAD_SIGX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) attrib = be16_to_cpu(*(__be16 *)(bufptr + HFSP_WRAPOFF_ATTRIB));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (!(attrib & HFSP_WRAP_ATTRIB_SLOCK) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) !(attrib & HFSP_WRAP_ATTRIB_SPARED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) wd->ablk_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) be32_to_cpu(*(__be32 *)(bufptr + HFSP_WRAPOFF_ABLKSIZE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (wd->ablk_size < HFSPLUS_SECTOR_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (wd->ablk_size % HFSPLUS_SECTOR_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) wd->ablk_start =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) be16_to_cpu(*(__be16 *)(bufptr + HFSP_WRAPOFF_ABLKSTART));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) extent = get_unaligned_be32(bufptr + HFSP_WRAPOFF_EMBEDEXT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) wd->embed_start = (extent >> 16) & 0xFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) wd->embed_count = extent & 0xFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int hfsplus_get_last_session(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) sector_t *start, sector_t *size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) /* default values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) *start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) *size = i_size_read(sb->s_bdev->bd_inode) >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (HFSPLUS_SB(sb)->session >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct cdrom_tocentry te;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (!cdi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) te.cdte_track = HFSPLUS_SB(sb)->session;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) te.cdte_format = CDROM_LBA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (cdrom_read_tocentry(cdi, &te) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) (te.cdte_ctrl & CDROM_DATA_TRACK) != 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) pr_err("invalid session number or type of track\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) *start = (sector_t)te.cdte_addr.lba << 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) } else if (cdi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct cdrom_multisession ms_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) ms_info.addr_format = CDROM_LBA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (cdrom_multisession(cdi, &ms_info) == 0 && ms_info.xa_flag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) *start = (sector_t)ms_info.addr.lba << 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) /* Find the volume header and fill in some minimum bits in superblock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /* Takes in super block, returns true if good data read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) int hfsplus_read_wrapper(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) struct hfsplus_wd wd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) sector_t part_start, part_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) u32 blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) error = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) blocksize = sb_min_blocksize(sb, HFSPLUS_SECTOR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (!blocksize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (hfsplus_get_last_session(sb, &part_start, &part_size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) sbi->s_vhdr_buf = kmalloc(hfsplus_min_io_size(sb), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (!sbi->s_vhdr_buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) sbi->s_backup_vhdr_buf = kmalloc(hfsplus_min_io_size(sb), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (!sbi->s_backup_vhdr_buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) goto out_free_vhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) reread:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) error = hfsplus_submit_bio(sb, part_start + HFSPLUS_VOLHEAD_SECTOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) sbi->s_vhdr_buf, (void **)&sbi->s_vhdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) REQ_OP_READ, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) goto out_free_backup_vhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) error = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) switch (sbi->s_vhdr->signature) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) case cpu_to_be16(HFSPLUS_VOLHEAD_SIGX):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) set_bit(HFSPLUS_SB_HFSX, &sbi->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) case cpu_to_be16(HFSPLUS_VOLHEAD_SIG):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) case cpu_to_be16(HFSP_WRAP_MAGIC):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (!hfsplus_read_mdb(sbi->s_vhdr, &wd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) goto out_free_backup_vhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) wd.ablk_size >>= HFSPLUS_SECTOR_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) part_start += (sector_t)wd.ablk_start +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) (sector_t)wd.embed_start * wd.ablk_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) part_size = (sector_t)wd.embed_count * wd.ablk_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) goto reread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * Check for a partition block.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * (should do this only for cdrom/loop though)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (hfs_part_find(sb, &part_start, &part_size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) goto out_free_backup_vhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) goto reread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) error = hfsplus_submit_bio(sb, part_start + part_size - 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) sbi->s_backup_vhdr_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) (void **)&sbi->s_backup_vhdr, REQ_OP_READ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) goto out_free_backup_vhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) error = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (sbi->s_backup_vhdr->signature != sbi->s_vhdr->signature) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) pr_warn("invalid secondary volume header\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) goto out_free_backup_vhdr;
^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) blocksize = be32_to_cpu(sbi->s_vhdr->blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * Block size must be at least as large as a sector and a multiple of 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (blocksize < HFSPLUS_SECTOR_SIZE || ((blocksize - 1) & blocksize))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) goto out_free_backup_vhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) sbi->alloc_blksz = blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) sbi->alloc_blksz_shift = ilog2(blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) blocksize = min_t(u32, sbi->alloc_blksz, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * Align block size to block offset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) while (part_start & ((blocksize >> HFSPLUS_SECTOR_SHIFT) - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) blocksize >>= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (sb_set_blocksize(sb, blocksize) != blocksize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) pr_err("unable to set blocksize to %u!\n", blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) goto out_free_backup_vhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) sbi->blockoffset =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) part_start >> (sb->s_blocksize_bits - HFSPLUS_SECTOR_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) sbi->part_start = part_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) sbi->sect_count = part_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) sbi->fs_shift = sbi->alloc_blksz_shift - sb->s_blocksize_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) out_free_backup_vhdr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) kfree(sbi->s_backup_vhdr_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) out_free_vhdr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) kfree(sbi->s_vhdr_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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