09c434b8a0047 (Thomas Gleixner 2019-05-19 13:08:20 +0100 1) // SPDX-License-Identifier: GPL-2.0-only
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 2) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 3) * linux/fs/sysv/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 4) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 5) * minix/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 6) * Copyright (C) 1991, 1992 Linus Torvalds
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 7) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 8) * xenix/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 9) * Copyright (C) 1992 Doug Evans
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 10) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 11) * coh/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 12) * Copyright (C) 1993 Pascal Haible, Bruno Haible
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 13) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 14) * sysv/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 15) * Copyright (C) 1993 Paul B. Monday
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 16) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 17) * sysv/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 18) * Copyright (C) 1993 Bruno Haible
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 19) * Copyright (C) 1997, 1998 Krzysztof G. Baranowski
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 20) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 21) * This file contains code for read/parsing the superblock.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 22) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 23)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 24) #include <linux/module.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 25) #include <linux/init.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 26) #include <linux/slab.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 27) #include <linux/buffer_head.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 28) #include "sysv.h"
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 29)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 30) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 31) * The following functions try to recognize specific filesystems.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 32) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 33) * We recognize:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 34) * - Xenix FS by its magic number.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 35) * - SystemV FS by its magic number.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 36) * - Coherent FS by its funny fname/fpack field.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 37) * - SCO AFS by s_nfree == 0xffff
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 38) * - V7 FS has no distinguishing features.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 39) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 40) * We discriminate among SystemV4 and SystemV2 FS by the assumption that
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 41) * the time stamp is not < 01-01-1980.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 42) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 43)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 44) enum {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 45) JAN_1_1980 = (10*365 + 2) * 24 * 60 * 60
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 46) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 47)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 48) static void detected_xenix(struct sysv_sb_info *sbi, unsigned *max_links)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 49) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 50) struct buffer_head *bh1 = sbi->s_bh1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 51) struct buffer_head *bh2 = sbi->s_bh2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 52) struct xenix_super_block * sbd1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 53) struct xenix_super_block * sbd2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 54)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 55) if (bh1 != bh2)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 56) sbd1 = sbd2 = (struct xenix_super_block *) bh1->b_data;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 57) else {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 58) /* block size = 512, so bh1 != bh2 */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 59) sbd1 = (struct xenix_super_block *) bh1->b_data;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 60) sbd2 = (struct xenix_super_block *) (bh2->b_data - 512);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 61) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 62)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 63) *max_links = XENIX_LINK_MAX;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 64) sbi->s_fic_size = XENIX_NICINOD;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 65) sbi->s_flc_size = XENIX_NICFREE;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 66) sbi->s_sbd1 = (char *)sbd1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 67) sbi->s_sbd2 = (char *)sbd2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 68) sbi->s_sb_fic_count = &sbd1->s_ninode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 69) sbi->s_sb_fic_inodes = &sbd1->s_inode[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 70) sbi->s_sb_total_free_inodes = &sbd2->s_tinode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 71) sbi->s_bcache_count = &sbd1->s_nfree;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 72) sbi->s_bcache = &sbd1->s_free[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 73) sbi->s_free_blocks = &sbd2->s_tfree;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 74) sbi->s_sb_time = &sbd2->s_time;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 75) sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd1->s_isize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 76) sbi->s_nzones = fs32_to_cpu(sbi, sbd1->s_fsize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 77) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 78)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 79) static void detected_sysv4(struct sysv_sb_info *sbi, unsigned *max_links)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 80) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 81) struct sysv4_super_block * sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 82) struct buffer_head *bh1 = sbi->s_bh1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 83) struct buffer_head *bh2 = sbi->s_bh2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 84)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 85) if (bh1 == bh2)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 86) sbd = (struct sysv4_super_block *) (bh1->b_data + BLOCK_SIZE/2);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 87) else
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 88) sbd = (struct sysv4_super_block *) bh2->b_data;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 89)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 90) *max_links = SYSV_LINK_MAX;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 91) sbi->s_fic_size = SYSV_NICINOD;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 92) sbi->s_flc_size = SYSV_NICFREE;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 93) sbi->s_sbd1 = (char *)sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 94) sbi->s_sbd2 = (char *)sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 95) sbi->s_sb_fic_count = &sbd->s_ninode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 96) sbi->s_sb_fic_inodes = &sbd->s_inode[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 97) sbi->s_sb_total_free_inodes = &sbd->s_tinode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 98) sbi->s_bcache_count = &sbd->s_nfree;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 99) sbi->s_bcache = &sbd->s_free[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 100) sbi->s_free_blocks = &sbd->s_tfree;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 101) sbi->s_sb_time = &sbd->s_time;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 102) sbi->s_sb_state = &sbd->s_state;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 103) sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 104) sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 105) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 106)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 107) static void detected_sysv2(struct sysv_sb_info *sbi, unsigned *max_links)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 108) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 109) struct sysv2_super_block *sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 110) struct buffer_head *bh1 = sbi->s_bh1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 111) struct buffer_head *bh2 = sbi->s_bh2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 112)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 113) if (bh1 == bh2)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 114) sbd = (struct sysv2_super_block *) (bh1->b_data + BLOCK_SIZE/2);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 115) else
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 116) sbd = (struct sysv2_super_block *) bh2->b_data;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 117)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 118) *max_links = SYSV_LINK_MAX;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 119) sbi->s_fic_size = SYSV_NICINOD;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 120) sbi->s_flc_size = SYSV_NICFREE;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 121) sbi->s_sbd1 = (char *)sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 122) sbi->s_sbd2 = (char *)sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 123) sbi->s_sb_fic_count = &sbd->s_ninode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 124) sbi->s_sb_fic_inodes = &sbd->s_inode[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 125) sbi->s_sb_total_free_inodes = &sbd->s_tinode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 126) sbi->s_bcache_count = &sbd->s_nfree;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 127) sbi->s_bcache = &sbd->s_free[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 128) sbi->s_free_blocks = &sbd->s_tfree;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 129) sbi->s_sb_time = &sbd->s_time;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 130) sbi->s_sb_state = &sbd->s_state;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 131) sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 132) sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 133) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 134)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 135) static void detected_coherent(struct sysv_sb_info *sbi, unsigned *max_links)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 136) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 137) struct coh_super_block * sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 138) struct buffer_head *bh1 = sbi->s_bh1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 139)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 140) sbd = (struct coh_super_block *) bh1->b_data;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 141)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 142) *max_links = COH_LINK_MAX;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 143) sbi->s_fic_size = COH_NICINOD;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 144) sbi->s_flc_size = COH_NICFREE;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 145) sbi->s_sbd1 = (char *)sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 146) sbi->s_sbd2 = (char *)sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 147) sbi->s_sb_fic_count = &sbd->s_ninode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 148) sbi->s_sb_fic_inodes = &sbd->s_inode[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 149) sbi->s_sb_total_free_inodes = &sbd->s_tinode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 150) sbi->s_bcache_count = &sbd->s_nfree;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 151) sbi->s_bcache = &sbd->s_free[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 152) sbi->s_free_blocks = &sbd->s_tfree;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 153) sbi->s_sb_time = &sbd->s_time;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 154) sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 155) sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 156) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 157)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 158) static void detected_v7(struct sysv_sb_info *sbi, unsigned *max_links)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 159) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 160) struct buffer_head *bh2 = sbi->s_bh2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 161) struct v7_super_block *sbd = (struct v7_super_block *)bh2->b_data;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 162)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 163) *max_links = V7_LINK_MAX;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 164) sbi->s_fic_size = V7_NICINOD;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 165) sbi->s_flc_size = V7_NICFREE;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 166) sbi->s_sbd1 = (char *)sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 167) sbi->s_sbd2 = (char *)sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 168) sbi->s_sb_fic_count = &sbd->s_ninode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 169) sbi->s_sb_fic_inodes = &sbd->s_inode[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 170) sbi->s_sb_total_free_inodes = &sbd->s_tinode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 171) sbi->s_bcache_count = &sbd->s_nfree;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 172) sbi->s_bcache = &sbd->s_free[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 173) sbi->s_free_blocks = &sbd->s_tfree;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 174) sbi->s_sb_time = &sbd->s_time;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 175) sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 176) sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 177) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 178)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 179) static int detect_xenix(struct sysv_sb_info *sbi, struct buffer_head *bh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 180) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 181) struct xenix_super_block *sbd = (struct xenix_super_block *)bh->b_data;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 182) if (*(__le32 *)&sbd->s_magic == cpu_to_le32(0x2b5544))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 183) sbi->s_bytesex = BYTESEX_LE;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 184) else if (*(__be32 *)&sbd->s_magic == cpu_to_be32(0x2b5544))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 185) sbi->s_bytesex = BYTESEX_BE;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 186) else
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 187) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 188) switch (fs32_to_cpu(sbi, sbd->s_type)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 189) case 1:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 190) sbi->s_type = FSTYPE_XENIX;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 191) return 1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 192) case 2:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 193) sbi->s_type = FSTYPE_XENIX;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 194) return 2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 195) default:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 196) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 197) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 198) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 199)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 200) static int detect_sysv(struct sysv_sb_info *sbi, struct buffer_head *bh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 201) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 202) struct super_block *sb = sbi->s_sb;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 203) /* All relevant fields are at the same offsets in R2 and R4 */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 204) struct sysv4_super_block * sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 205) u32 type;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 206)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 207) sbd = (struct sysv4_super_block *) (bh->b_data + BLOCK_SIZE/2);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 208) if (*(__le32 *)&sbd->s_magic == cpu_to_le32(0xfd187e20))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 209) sbi->s_bytesex = BYTESEX_LE;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 210) else if (*(__be32 *)&sbd->s_magic == cpu_to_be32(0xfd187e20))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 211) sbi->s_bytesex = BYTESEX_BE;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 212) else
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 213) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 214)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 215) type = fs32_to_cpu(sbi, sbd->s_type);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 216)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 217) if (fs16_to_cpu(sbi, sbd->s_nfree) == 0xffff) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 218) sbi->s_type = FSTYPE_AFS;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 219) sbi->s_forced_ro = 1;
bc98a42c1f7d0 (David Howells 2017-07-17 08:45:34 +0100 220) if (!sb_rdonly(sb)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 221) printk("SysV FS: SCO EAFS on %s detected, "
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 222) "forcing read-only mode.\n",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 223) sb->s_id);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 224) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 225) return type;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 226) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 227)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 228) if (fs32_to_cpu(sbi, sbd->s_time) < JAN_1_1980) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 229) /* this is likely to happen on SystemV2 FS */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 230) if (type > 3 || type < 1)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 231) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 232) sbi->s_type = FSTYPE_SYSV2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 233) return type;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 234) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 235) if ((type > 3 || type < 1) && (type > 0x30 || type < 0x10))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 236) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 237)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 238) /* On Interactive Unix (ISC) Version 4.0/3.x s_type field = 0x10,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 239) 0x20 or 0x30 indicates that symbolic links and the 14-character
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 240) filename limit is gone. Due to lack of information about this
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 241) feature read-only mode seems to be a reasonable approach... -KGB */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 242)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 243) if (type >= 0x10) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 244) printk("SysV FS: can't handle long file names on %s, "
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 245) "forcing read-only mode.\n", sb->s_id);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 246) sbi->s_forced_ro = 1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 247) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 248)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 249) sbi->s_type = FSTYPE_SYSV4;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 250) return type >= 0x10 ? type >> 4 : type;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 251) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 252)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 253) static int detect_coherent(struct sysv_sb_info *sbi, struct buffer_head *bh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 254) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 255) struct coh_super_block * sbd;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 256)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 257) sbd = (struct coh_super_block *) (bh->b_data + BLOCK_SIZE/2);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 258) if ((memcmp(sbd->s_fname,"noname",6) && memcmp(sbd->s_fname,"xxxxx ",6))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 259) || (memcmp(sbd->s_fpack,"nopack",6) && memcmp(sbd->s_fpack,"xxxxx\n",6)))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 260) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 261) sbi->s_bytesex = BYTESEX_PDP;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 262) sbi->s_type = FSTYPE_COH;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 263) return 1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 264) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 265)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 266) static int detect_sysv_odd(struct sysv_sb_info *sbi, struct buffer_head *bh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 267) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 268) int size = detect_sysv(sbi, bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 269)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 270) return size>2 ? 0 : size;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 271) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 272)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 273) static struct {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 274) int block;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 275) int (*test)(struct sysv_sb_info *, struct buffer_head *);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 276) } flavours[] = {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 277) {1, detect_xenix},
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 278) {0, detect_sysv},
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 279) {0, detect_coherent},
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 280) {9, detect_sysv_odd},
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 281) {15,detect_sysv_odd},
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 282) {18,detect_sysv},
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 283) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 284)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 285) static char *flavour_names[] = {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 286) [FSTYPE_XENIX] = "Xenix",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 287) [FSTYPE_SYSV4] = "SystemV",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 288) [FSTYPE_SYSV2] = "SystemV Release 2",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 289) [FSTYPE_COH] = "Coherent",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 290) [FSTYPE_V7] = "V7",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 291) [FSTYPE_AFS] = "AFS",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 292) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 293)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 294) static void (*flavour_setup[])(struct sysv_sb_info *, unsigned *) = {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 295) [FSTYPE_XENIX] = detected_xenix,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 296) [FSTYPE_SYSV4] = detected_sysv4,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 297) [FSTYPE_SYSV2] = detected_sysv2,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 298) [FSTYPE_COH] = detected_coherent,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 299) [FSTYPE_V7] = detected_v7,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 300) [FSTYPE_AFS] = detected_sysv4,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 301) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 302)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 303) static int complete_read_super(struct super_block *sb, int silent, int size)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 304) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 305) struct sysv_sb_info *sbi = SYSV_SB(sb);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 306) struct inode *root_inode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 307) char *found = flavour_names[sbi->s_type];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 308) u_char n_bits = size+8;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 309) int bsize = 1 << n_bits;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 310) int bsize_4 = bsize >> 2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 311)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 312) sbi->s_firstinodezone = 2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 313)
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 314) flavour_setup[sbi->s_type](sbi, &sb->s_max_links);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 315)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 316) sbi->s_ndatazones = sbi->s_nzones - sbi->s_firstdatazone;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 317) sbi->s_inodes_per_block = bsize >> 6;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 318) sbi->s_inodes_per_block_1 = (bsize >> 6)-1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 319) sbi->s_inodes_per_block_bits = n_bits-6;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 320) sbi->s_ind_per_block = bsize_4;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 321) sbi->s_ind_per_block_2 = bsize_4*bsize_4;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 322) sbi->s_toobig_block = 10 + bsize_4 * (1 + bsize_4 * (1 + bsize_4));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 323) sbi->s_ind_per_block_bits = n_bits-2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 324)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 325) sbi->s_ninodes = (sbi->s_firstdatazone - sbi->s_firstinodezone)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 326) << sbi->s_inodes_per_block_bits;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 327)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 328) if (!silent)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 329) printk("VFS: Found a %s FS (block size = %ld) on device %s\n",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 330) found, sb->s_blocksize, sb->s_id);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 331)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 332) sb->s_magic = SYSV_MAGIC_BASE + sbi->s_type;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 333) /* set up enough so that it can read an inode */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 334) sb->s_op = &sysv_sops;
30304aba6a053 (Al Viro 2010-12-18 11:16:30 -0500 335) if (sbi->s_forced_ro)
1751e8a6cb935 (Linus Torvalds 2017-11-27 13:05:09 -0800 336) sb->s_flags |= SB_RDONLY;
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 337) root_inode = sysv_iget(sb, SYSV_ROOT_INO);
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 338) if (IS_ERR(root_inode)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 339) printk("SysV FS: get root inode failed\n");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 340) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 341) }
48fde701aff66 (Al Viro 2012-01-08 22:15:13 -0500 342) sb->s_root = d_make_root(root_inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 343) if (!sb->s_root) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 344) printk("SysV FS: get root dentry failed\n");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 345) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 346) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 347) return 1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 348) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 349)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 350) static int sysv_fill_super(struct super_block *sb, void *data, int silent)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 351) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 352) struct buffer_head *bh1, *bh = NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 353) struct sysv_sb_info *sbi;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 354) unsigned long blocknr;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 355) int size = 0, i;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 356)
2ecd05ae68a90 (Alexey Dobriyan 2006-10-11 01:22:05 -0700 357) BUILD_BUG_ON(1024 != sizeof (struct xenix_super_block));
2ecd05ae68a90 (Alexey Dobriyan 2006-10-11 01:22:05 -0700 358) BUILD_BUG_ON(512 != sizeof (struct sysv4_super_block));
2ecd05ae68a90 (Alexey Dobriyan 2006-10-11 01:22:05 -0700 359) BUILD_BUG_ON(512 != sizeof (struct sysv2_super_block));
2ecd05ae68a90 (Alexey Dobriyan 2006-10-11 01:22:05 -0700 360) BUILD_BUG_ON(500 != sizeof (struct coh_super_block));
2ecd05ae68a90 (Alexey Dobriyan 2006-10-11 01:22:05 -0700 361) BUILD_BUG_ON(64 != sizeof (struct sysv_inode));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 362)
f8314dc60ccba (Panagiotis Issaris 2006-09-27 01:49:37 -0700 363) sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 364) if (!sbi)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 365) return -ENOMEM;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 366)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 367) sbi->s_sb = sb;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 368) sbi->s_block_base = 0;
c07cb01c45d6f (Marco Stornelli 2012-10-06 12:41:46 +0200 369) mutex_init(&sbi->s_lock);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 370) sb->s_fs_info = sbi;
452c2779410a0 (Deepa Dinamani 2019-03-08 12:40:03 -0800 371) sb->s_time_min = 0;
452c2779410a0 (Deepa Dinamani 2019-03-08 12:40:03 -0800 372) sb->s_time_max = U32_MAX;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 373) sb_set_blocksize(sb, BLOCK_SIZE);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 374)
e8c96f8c29d89 (Tobias Klauser 2006-03-24 03:15:34 -0800 375) for (i = 0; i < ARRAY_SIZE(flavours) && !size; i++) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 376) brelse(bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 377) bh = sb_bread(sb, flavours[i].block);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 378) if (!bh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 379) continue;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 380) size = flavours[i].test(SYSV_SB(sb), bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 381) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 382)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 383) if (!size)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 384) goto Eunknown;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 385)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 386) switch (size) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 387) case 1:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 388) blocknr = bh->b_blocknr << 1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 389) brelse(bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 390) sb_set_blocksize(sb, 512);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 391) bh1 = sb_bread(sb, blocknr);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 392) bh = sb_bread(sb, blocknr + 1);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 393) break;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 394) case 2:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 395) bh1 = bh;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 396) break;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 397) case 3:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 398) blocknr = bh->b_blocknr >> 1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 399) brelse(bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 400) sb_set_blocksize(sb, 2048);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 401) bh1 = bh = sb_bread(sb, blocknr);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 402) break;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 403) default:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 404) goto Ebadsize;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 405) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 406)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 407) if (bh && bh1) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 408) sbi->s_bh1 = bh1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 409) sbi->s_bh2 = bh;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 410) if (complete_read_super(sb, silent, size))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 411) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 412) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 413)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 414) brelse(bh1);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 415) brelse(bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 416) sb_set_blocksize(sb, BLOCK_SIZE);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 417) printk("oldfs: cannot read superblock\n");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 418) failed:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 419) kfree(sbi);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 420) return -EINVAL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 421)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 422) Eunknown:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 423) brelse(bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 424) if (!silent)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 425) printk("VFS: unable to find oldfs superblock on device %s\n",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 426) sb->s_id);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 427) goto failed;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 428) Ebadsize:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 429) brelse(bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 430) if (!silent)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 431) printk("VFS: oldfs: unsupported block size (%dKb)\n",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 432) 1<<(size-2));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 433) goto failed;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 434) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 435)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 436) static int v7_sanity_check(struct super_block *sb, struct buffer_head *bh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 437) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 438) struct v7_super_block *v7sb;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 439) struct sysv_inode *v7i;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 440) struct buffer_head *bh2;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 441) struct sysv_sb_info *sbi;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 442)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 443) sbi = sb->s_fs_info;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 444)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 445) /* plausibility check on superblock */
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 446) v7sb = (struct v7_super_block *) bh->b_data;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 447) if (fs16_to_cpu(sbi, v7sb->s_nfree) > V7_NICFREE ||
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 448) fs16_to_cpu(sbi, v7sb->s_ninode) > V7_NICINOD ||
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 449) fs32_to_cpu(sbi, v7sb->s_fsize) > V7_MAXSIZE)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 450) return 0;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 451)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 452) /* plausibility check on root inode: it is a directory,
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 453) with a nonzero size that is a multiple of 16 */
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 454) bh2 = sb_bread(sb, 2);
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 455) if (bh2 == NULL)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 456) return 0;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 457)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 458) v7i = (struct sysv_inode *)(bh2->b_data + 64);
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 459) if ((fs16_to_cpu(sbi, v7i->i_mode) & ~0777) != S_IFDIR ||
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 460) (fs32_to_cpu(sbi, v7i->i_size) == 0) ||
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 461) (fs32_to_cpu(sbi, v7i->i_size) & 017) ||
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 462) (fs32_to_cpu(sbi, v7i->i_size) > V7_NFILES *
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 463) sizeof(struct sysv_dir_entry))) {
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 464) brelse(bh2);
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 465) return 0;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 466) }
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 467)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 468) brelse(bh2);
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 469) return 1;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 470) }
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 471)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 472) static int v7_fill_super(struct super_block *sb, void *data, int silent)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 473) {
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 474) struct sysv_sb_info *sbi;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 475) struct buffer_head *bh;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 476)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 477) if (440 != sizeof (struct v7_super_block))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 478) panic("V7 FS: bad super-block size");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 479) if (64 != sizeof (struct sysv_inode))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 480) panic("sysv fs: bad i-node size");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 481)
f8314dc60ccba (Panagiotis Issaris 2006-09-27 01:49:37 -0700 482) sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 483) if (!sbi)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 484) return -ENOMEM;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 485)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 486) sbi->s_sb = sb;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 487) sbi->s_block_base = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 488) sbi->s_type = FSTYPE_V7;
49475555848d3 (Lubomir Rintel 2013-09-18 12:39:16 +0200 489) mutex_init(&sbi->s_lock);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 490) sb->s_fs_info = sbi;
452c2779410a0 (Deepa Dinamani 2019-03-08 12:40:03 -0800 491) sb->s_time_min = 0;
452c2779410a0 (Deepa Dinamani 2019-03-08 12:40:03 -0800 492) sb->s_time_max = U32_MAX;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 493)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 494) sb_set_blocksize(sb, 512);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 495)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 496) if ((bh = sb_bread(sb, 1)) == NULL) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 497) if (!silent)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 498) printk("VFS: unable to read V7 FS superblock on "
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 499) "device %s.\n", sb->s_id);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 500) goto failed;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 501) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 502)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 503) /* Try PDP-11 UNIX */
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 504) sbi->s_bytesex = BYTESEX_PDP;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 505) if (v7_sanity_check(sb, bh))
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 506) goto detected;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 507)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 508) /* Try PC/IX, v7/x86 */
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 509) sbi->s_bytesex = BYTESEX_LE;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 510) if (v7_sanity_check(sb, bh))
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 511) goto detected;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 512)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 513) goto failed;
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 514)
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 515) detected:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 516) sbi->s_bh1 = bh;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 517) sbi->s_bh2 = bh;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 518) if (complete_read_super(sb, silent, 1))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 519) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 520)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 521) failed:
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 522) printk(KERN_ERR "VFS: could not find a valid V7 on %s.\n",
6d0b5456e14ec (Lubomir Rintel 2010-08-10 18:03:34 -0700 523) sb->s_id);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 524) brelse(bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 525) kfree(sbi);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 526) return -EINVAL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 527) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 528)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 529) /* Every kernel module contains stuff like this. */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 530)
152a083666710 (Al Viro 2010-07-25 00:46:55 +0400 531) static struct dentry *sysv_mount(struct file_system_type *fs_type,
152a083666710 (Al Viro 2010-07-25 00:46:55 +0400 532) int flags, const char *dev_name, void *data)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 533) {
152a083666710 (Al Viro 2010-07-25 00:46:55 +0400 534) return mount_bdev(fs_type, flags, dev_name, data, sysv_fill_super);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 535) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 536)
152a083666710 (Al Viro 2010-07-25 00:46:55 +0400 537) static struct dentry *v7_mount(struct file_system_type *fs_type,
152a083666710 (Al Viro 2010-07-25 00:46:55 +0400 538) int flags, const char *dev_name, void *data)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 539) {
152a083666710 (Al Viro 2010-07-25 00:46:55 +0400 540) return mount_bdev(fs_type, flags, dev_name, data, v7_fill_super);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 541) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 542)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 543) static struct file_system_type sysv_fs_type = {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 544) .owner = THIS_MODULE,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 545) .name = "sysv",
152a083666710 (Al Viro 2010-07-25 00:46:55 +0400 546) .mount = sysv_mount,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 547) .kill_sb = kill_block_super,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 548) .fs_flags = FS_REQUIRES_DEV,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 549) };
7f78e03513940 (Eric W. Biederman 2013-03-02 19:39:14 -0800 550) MODULE_ALIAS_FS("sysv");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 551)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 552) static struct file_system_type v7_fs_type = {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 553) .owner = THIS_MODULE,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 554) .name = "v7",
152a083666710 (Al Viro 2010-07-25 00:46:55 +0400 555) .mount = v7_mount,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 556) .kill_sb = kill_block_super,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 557) .fs_flags = FS_REQUIRES_DEV,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 558) };
7f78e03513940 (Eric W. Biederman 2013-03-02 19:39:14 -0800 559) MODULE_ALIAS_FS("v7");
fa7614ddd6c23 (Eric W. Biederman 2013-03-12 18:27:41 -0700 560) MODULE_ALIAS("v7");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 561)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 562) static int __init init_sysv_fs(void)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 563) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 564) int error;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 565)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 566) error = sysv_init_icache();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 567) if (error)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 568) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 569) error = register_filesystem(&sysv_fs_type);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 570) if (error)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 571) goto destroy_icache;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 572) error = register_filesystem(&v7_fs_type);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 573) if (error)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 574) goto unregister;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 575) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 576)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 577) unregister:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 578) unregister_filesystem(&sysv_fs_type);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 579) destroy_icache:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 580) sysv_destroy_icache();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 581) out:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 582) return error;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 583) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 584)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 585) static void __exit exit_sysv_fs(void)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 586) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 587) unregister_filesystem(&sysv_fs_type);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 588) unregister_filesystem(&v7_fs_type);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 589) sysv_destroy_icache();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 590) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 591)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 592) module_init(init_sysv_fs)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 593) module_exit(exit_sysv_fs)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 594) MODULE_LICENSE("GPL");
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
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