^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/fs/ext2/super.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1992, 1993, 1994, 1995
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Remy Card (card@masi.ibp.fr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Laboratoire MASI - Institut Blaise Pascal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Universite Pierre et Marie Curie (Paris VI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * linux/fs/minix/inode.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Copyright (C) 1991, 1992 Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Big-endian to little-endian byte-swapping/bitmaps by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * David S. Miller (davem@caip.rutgers.edu), 1995
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/parser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/random.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/exportfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/log2.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/quotaops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/dax.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/iversion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include "ext2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include "xattr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include "acl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static void ext2_write_super(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int ext2_remount (struct super_block * sb, int * flags, char * data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int ext2_sync_fs(struct super_block *sb, int wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static int ext2_freeze(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static int ext2_unfreeze(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) void ext2_error(struct super_block *sb, const char *function,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) const char *fmt, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct va_format vaf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) va_list args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct ext2_sb_info *sbi = EXT2_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct ext2_super_block *es = sbi->s_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (!sb_rdonly(sb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) spin_lock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) sbi->s_mount_state |= EXT2_ERROR_FS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) es->s_state |= cpu_to_le16(EXT2_ERROR_FS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) ext2_sync_super(sb, es, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) va_start(args, fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) vaf.fmt = fmt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) vaf.va = &args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) printk(KERN_CRIT "EXT2-fs (%s): error: %s: %pV\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) sb->s_id, function, &vaf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) va_end(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (test_opt(sb, ERRORS_PANIC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) panic("EXT2-fs: panic from previous error\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (!sb_rdonly(sb) && test_opt(sb, ERRORS_RO)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ext2_msg(sb, KERN_CRIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) "error: remounting filesystem read-only");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) sb->s_flags |= SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) void ext2_msg(struct super_block *sb, const char *prefix,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) const char *fmt, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct va_format vaf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) va_list args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) va_start(args, fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) vaf.fmt = fmt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) vaf.va = &args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) printk("%sEXT2-fs (%s): %pV\n", prefix, sb->s_id, &vaf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) va_end(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * This must be called with sbi->s_lock held.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) void ext2_update_dynamic_rev(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct ext2_super_block *es = EXT2_SB(sb)->s_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (le32_to_cpu(es->s_rev_level) > EXT2_GOOD_OLD_REV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ext2_msg(sb, KERN_WARNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) "warning: updating to rev %d because of "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) "new feature flag, running e2fsck is recommended",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) EXT2_DYNAMIC_REV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) es->s_first_ino = cpu_to_le32(EXT2_GOOD_OLD_FIRST_INO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) es->s_inode_size = cpu_to_le16(EXT2_GOOD_OLD_INODE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) es->s_rev_level = cpu_to_le32(EXT2_DYNAMIC_REV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /* leave es->s_feature_*compat flags alone */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /* es->s_uuid will be set by e2fsck if empty */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * The rest of the superblock fields should be zero, and if not it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * means they are likely already in use, so leave them alone. We
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * can leave it up to e2fsck to clean up any inconsistencies there.
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #ifdef CONFIG_QUOTA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int ext2_quota_off(struct super_block *sb, int type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static void ext2_quota_off_umount(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) int type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) for (type = 0; type < MAXQUOTAS; type++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) ext2_quota_off(sb, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static inline void ext2_quota_off_umount(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static void ext2_put_super (struct super_block * sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int db_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct ext2_sb_info *sbi = EXT2_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ext2_quota_off_umount(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) ext2_xattr_destroy_cache(sbi->s_ea_block_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) sbi->s_ea_block_cache = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (!sb_rdonly(sb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct ext2_super_block *es = sbi->s_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) spin_lock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) es->s_state = cpu_to_le16(sbi->s_mount_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ext2_sync_super(sb, es, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) db_count = sbi->s_gdb_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) for (i = 0; i < db_count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) brelse(sbi->s_group_desc[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) kfree(sbi->s_group_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) kfree(sbi->s_debts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) percpu_counter_destroy(&sbi->s_freeblocks_counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) percpu_counter_destroy(&sbi->s_freeinodes_counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) percpu_counter_destroy(&sbi->s_dirs_counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) brelse (sbi->s_sbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) sb->s_fs_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) kfree(sbi->s_blockgroup_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) fs_put_dax(sbi->s_daxdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) kfree(sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static struct kmem_cache * ext2_inode_cachep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static struct inode *ext2_alloc_inode(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct ext2_inode_info *ei;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) ei = kmem_cache_alloc(ext2_inode_cachep, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (!ei)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) ei->i_block_alloc_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) inode_set_iversion(&ei->vfs_inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) #ifdef CONFIG_QUOTA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) return &ei->vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static void ext2_free_in_core_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) kmem_cache_free(ext2_inode_cachep, EXT2_I(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static void init_once(void *foo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) struct ext2_inode_info *ei = (struct ext2_inode_info *) foo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) rwlock_init(&ei->i_meta_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) #ifdef CONFIG_EXT2_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) init_rwsem(&ei->xattr_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) mutex_init(&ei->truncate_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) #ifdef CONFIG_FS_DAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) init_rwsem(&ei->dax_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) inode_init_once(&ei->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static int __init init_inodecache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) ext2_inode_cachep = kmem_cache_create_usercopy("ext2_inode_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) sizeof(struct ext2_inode_info), 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) SLAB_ACCOUNT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) offsetof(struct ext2_inode_info, i_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) sizeof_field(struct ext2_inode_info, i_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) init_once);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (ext2_inode_cachep == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static void destroy_inodecache(void)
^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) * Make sure all delayed rcu free inodes are flushed before we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * destroy cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) rcu_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) kmem_cache_destroy(ext2_inode_cachep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static int ext2_show_options(struct seq_file *seq, struct dentry *root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct super_block *sb = root->d_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct ext2_sb_info *sbi = EXT2_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct ext2_super_block *es = sbi->s_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) unsigned long def_mount_opts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) spin_lock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (sbi->s_sb_block != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) seq_printf(seq, ",sb=%lu", sbi->s_sb_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (test_opt(sb, MINIX_DF))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) seq_puts(seq, ",minixdf");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (test_opt(sb, GRPID))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) seq_puts(seq, ",grpid");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (!test_opt(sb, GRPID) && (def_mount_opts & EXT2_DEFM_BSDGROUPS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) seq_puts(seq, ",nogrpid");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) if (!uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT2_DEF_RESUID)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) le16_to_cpu(es->s_def_resuid) != EXT2_DEF_RESUID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) seq_printf(seq, ",resuid=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) from_kuid_munged(&init_user_ns, sbi->s_resuid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (!gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT2_DEF_RESGID)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) le16_to_cpu(es->s_def_resgid) != EXT2_DEF_RESGID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) seq_printf(seq, ",resgid=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) from_kgid_munged(&init_user_ns, sbi->s_resgid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (test_opt(sb, ERRORS_RO)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) int def_errors = le16_to_cpu(es->s_errors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (def_errors == EXT2_ERRORS_PANIC ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) def_errors == EXT2_ERRORS_CONTINUE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) seq_puts(seq, ",errors=remount-ro");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (test_opt(sb, ERRORS_CONT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) seq_puts(seq, ",errors=continue");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (test_opt(sb, ERRORS_PANIC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) seq_puts(seq, ",errors=panic");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (test_opt(sb, NO_UID32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) seq_puts(seq, ",nouid32");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (test_opt(sb, DEBUG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) seq_puts(seq, ",debug");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (test_opt(sb, OLDALLOC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) seq_puts(seq, ",oldalloc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) #ifdef CONFIG_EXT2_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (test_opt(sb, XATTR_USER))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) seq_puts(seq, ",user_xattr");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (!test_opt(sb, XATTR_USER) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) (def_mount_opts & EXT2_DEFM_XATTR_USER)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) seq_puts(seq, ",nouser_xattr");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) #ifdef CONFIG_EXT2_FS_POSIX_ACL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (test_opt(sb, POSIX_ACL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) seq_puts(seq, ",acl");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT2_DEFM_ACL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) seq_puts(seq, ",noacl");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (test_opt(sb, NOBH))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) seq_puts(seq, ",nobh");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (test_opt(sb, USRQUOTA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) seq_puts(seq, ",usrquota");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (test_opt(sb, GRPQUOTA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) seq_puts(seq, ",grpquota");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) if (test_opt(sb, XIP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) seq_puts(seq, ",xip");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (test_opt(sb, DAX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) seq_puts(seq, ",dax");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (!test_opt(sb, RESERVATION))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) seq_puts(seq, ",noreservation");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) #ifdef CONFIG_QUOTA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) static ssize_t ext2_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) static int ext2_quota_on(struct super_block *sb, int type, int format_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) const struct path *path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) static struct dquot **ext2_get_dquots(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return EXT2_I(inode)->i_dquot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) static const struct quotactl_ops ext2_quotactl_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) .quota_on = ext2_quota_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) .quota_off = ext2_quota_off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) .quota_sync = dquot_quota_sync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) .get_state = dquot_get_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) .set_info = dquot_set_dqinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) .get_dqblk = dquot_get_dqblk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) .set_dqblk = dquot_set_dqblk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) .get_nextdqblk = dquot_get_next_dqblk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) static const struct super_operations ext2_sops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) .alloc_inode = ext2_alloc_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) .free_inode = ext2_free_in_core_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) .write_inode = ext2_write_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) .evict_inode = ext2_evict_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) .put_super = ext2_put_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) .sync_fs = ext2_sync_fs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) .freeze_fs = ext2_freeze,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) .unfreeze_fs = ext2_unfreeze,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) .statfs = ext2_statfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) .remount_fs = ext2_remount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) .show_options = ext2_show_options,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) #ifdef CONFIG_QUOTA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) .quota_read = ext2_quota_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) .quota_write = ext2_quota_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) .get_dquots = ext2_get_dquots,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) static struct inode *ext2_nfs_get_inode(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) u64 ino, u32 generation)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (ino < EXT2_FIRST_INO(sb) && ino != EXT2_ROOT_INO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) return ERR_PTR(-ESTALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (ino > le32_to_cpu(EXT2_SB(sb)->s_es->s_inodes_count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) return ERR_PTR(-ESTALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) * ext2_iget isn't quite right if the inode is currently unallocated!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) * However ext2_iget currently does appropriate checks to handle stale
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * inodes so everything is OK.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) inode = ext2_iget(sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) if (IS_ERR(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return ERR_CAST(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (generation && inode->i_generation != generation) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) /* we didn't find the right inode.. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) return ERR_PTR(-ESTALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) static struct dentry *ext2_fh_to_dentry(struct super_block *sb, struct fid *fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) int fh_len, int fh_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) ext2_nfs_get_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) static struct dentry *ext2_fh_to_parent(struct super_block *sb, struct fid *fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) int fh_len, int fh_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) return generic_fh_to_parent(sb, fid, fh_len, fh_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) ext2_nfs_get_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) static const struct export_operations ext2_export_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) .fh_to_dentry = ext2_fh_to_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) .fh_to_parent = ext2_fh_to_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) .get_parent = ext2_get_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) static unsigned long get_sb_block(void **data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) unsigned long sb_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) char *options = (char *) *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (!options || strncmp(options, "sb=", 3) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) return 1; /* Default location */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) options += 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) sb_block = simple_strtoul(options, &options, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if (*options && *options != ',') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) printk("EXT2-fs: Invalid sb specification: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) (char *) *data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (*options == ',')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) options++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) *data = (void *) options;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) return sb_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) Opt_err_ro, Opt_nouid32, Opt_debug,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) Opt_oldalloc, Opt_orlov, Opt_nobh, Opt_user_xattr, Opt_nouser_xattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) Opt_acl, Opt_noacl, Opt_xip, Opt_dax, Opt_ignore, Opt_err, Opt_quota,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) Opt_usrquota, Opt_grpquota, Opt_reservation, Opt_noreservation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) static const match_table_t tokens = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) {Opt_bsd_df, "bsddf"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) {Opt_minix_df, "minixdf"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) {Opt_grpid, "grpid"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) {Opt_grpid, "bsdgroups"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {Opt_nogrpid, "nogrpid"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) {Opt_nogrpid, "sysvgroups"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) {Opt_resgid, "resgid=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) {Opt_resuid, "resuid=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) {Opt_sb, "sb=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) {Opt_err_cont, "errors=continue"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) {Opt_err_panic, "errors=panic"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) {Opt_err_ro, "errors=remount-ro"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) {Opt_nouid32, "nouid32"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) {Opt_debug, "debug"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) {Opt_oldalloc, "oldalloc"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) {Opt_orlov, "orlov"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) {Opt_nobh, "nobh"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) {Opt_user_xattr, "user_xattr"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {Opt_nouser_xattr, "nouser_xattr"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) {Opt_acl, "acl"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) {Opt_noacl, "noacl"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) {Opt_xip, "xip"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) {Opt_dax, "dax"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {Opt_grpquota, "grpquota"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) {Opt_ignore, "noquota"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) {Opt_quota, "quota"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) {Opt_usrquota, "usrquota"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) {Opt_reservation, "reservation"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) {Opt_noreservation, "noreservation"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) {Opt_err, NULL}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) static int parse_options(char *options, struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) struct ext2_mount_options *opts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) substring_t args[MAX_OPT_ARGS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) int option;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) kuid_t uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) kgid_t gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (!options)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) while ((p = strsep (&options, ",")) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) int token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (!*p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) token = match_token(p, tokens, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) switch (token) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) case Opt_bsd_df:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) clear_opt (opts->s_mount_opt, MINIX_DF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) case Opt_minix_df:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) set_opt (opts->s_mount_opt, MINIX_DF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) case Opt_grpid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) set_opt (opts->s_mount_opt, GRPID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) case Opt_nogrpid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) clear_opt (opts->s_mount_opt, GRPID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) case Opt_resuid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (match_int(&args[0], &option))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) uid = make_kuid(current_user_ns(), option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (!uid_valid(uid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) ext2_msg(sb, KERN_ERR, "Invalid uid value %d", option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) opts->s_resuid = uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) case Opt_resgid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (match_int(&args[0], &option))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) gid = make_kgid(current_user_ns(), option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (!gid_valid(gid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) ext2_msg(sb, KERN_ERR, "Invalid gid value %d", option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) opts->s_resgid = gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) case Opt_sb:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) /* handled by get_sb_block() instead of here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) /* *sb_block = match_int(&args[0]); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) case Opt_err_panic:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) clear_opt (opts->s_mount_opt, ERRORS_CONT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) clear_opt (opts->s_mount_opt, ERRORS_RO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) set_opt (opts->s_mount_opt, ERRORS_PANIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) case Opt_err_ro:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) clear_opt (opts->s_mount_opt, ERRORS_CONT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) clear_opt (opts->s_mount_opt, ERRORS_PANIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) set_opt (opts->s_mount_opt, ERRORS_RO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) case Opt_err_cont:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) clear_opt (opts->s_mount_opt, ERRORS_RO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) clear_opt (opts->s_mount_opt, ERRORS_PANIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) set_opt (opts->s_mount_opt, ERRORS_CONT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) case Opt_nouid32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) set_opt (opts->s_mount_opt, NO_UID32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) case Opt_debug:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) set_opt (opts->s_mount_opt, DEBUG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) case Opt_oldalloc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) set_opt (opts->s_mount_opt, OLDALLOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) case Opt_orlov:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) clear_opt (opts->s_mount_opt, OLDALLOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) case Opt_nobh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) set_opt (opts->s_mount_opt, NOBH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) #ifdef CONFIG_EXT2_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) case Opt_user_xattr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) set_opt (opts->s_mount_opt, XATTR_USER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) case Opt_nouser_xattr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) clear_opt (opts->s_mount_opt, XATTR_USER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) case Opt_user_xattr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) case Opt_nouser_xattr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) ext2_msg(sb, KERN_INFO, "(no)user_xattr options"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) "not supported");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) #ifdef CONFIG_EXT2_FS_POSIX_ACL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) case Opt_acl:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) set_opt(opts->s_mount_opt, POSIX_ACL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) case Opt_noacl:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) clear_opt(opts->s_mount_opt, POSIX_ACL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) case Opt_acl:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) case Opt_noacl:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) ext2_msg(sb, KERN_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) "(no)acl options not supported");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) case Opt_xip:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) ext2_msg(sb, KERN_INFO, "use dax instead of xip");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) set_opt(opts->s_mount_opt, XIP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) case Opt_dax:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) #ifdef CONFIG_FS_DAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) ext2_msg(sb, KERN_WARNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) set_opt(opts->s_mount_opt, DAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) ext2_msg(sb, KERN_INFO, "dax option not supported");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) #if defined(CONFIG_QUOTA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) case Opt_quota:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) case Opt_usrquota:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) set_opt(opts->s_mount_opt, USRQUOTA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) case Opt_grpquota:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) set_opt(opts->s_mount_opt, GRPQUOTA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) case Opt_quota:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) case Opt_usrquota:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) case Opt_grpquota:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) ext2_msg(sb, KERN_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) "quota operations not supported");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) case Opt_reservation:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) set_opt(opts->s_mount_opt, RESERVATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) ext2_msg(sb, KERN_INFO, "reservations ON");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) case Opt_noreservation:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) clear_opt(opts->s_mount_opt, RESERVATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) ext2_msg(sb, KERN_INFO, "reservations OFF");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) case Opt_ignore:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) static int ext2_setup_super (struct super_block * sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) struct ext2_super_block * es,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) int read_only)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) int res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) struct ext2_sb_info *sbi = EXT2_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) if (le32_to_cpu(es->s_rev_level) > EXT2_MAX_SUPP_REV) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) "error: revision level too high, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) "forcing read-only mode");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) res = SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) if (read_only)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) if (!(sbi->s_mount_state & EXT2_VALID_FS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) ext2_msg(sb, KERN_WARNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) "warning: mounting unchecked fs, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) "running e2fsck is recommended");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) else if ((sbi->s_mount_state & EXT2_ERROR_FS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) ext2_msg(sb, KERN_WARNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) "warning: mounting fs with errors, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) "running e2fsck is recommended");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) le16_to_cpu(es->s_mnt_count) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) ext2_msg(sb, KERN_WARNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) "warning: maximal mount count reached, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) "running e2fsck is recommended");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) else if (le32_to_cpu(es->s_checkinterval) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) (le32_to_cpu(es->s_lastcheck) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) le32_to_cpu(es->s_checkinterval) <=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) ktime_get_real_seconds()))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) ext2_msg(sb, KERN_WARNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) "warning: checktime reached, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) "running e2fsck is recommended");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) if (!le16_to_cpu(es->s_max_mnt_count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) es->s_max_mnt_count = cpu_to_le16(EXT2_DFL_MAX_MNT_COUNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) le16_add_cpu(&es->s_mnt_count, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) if (test_opt (sb, DEBUG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) ext2_msg(sb, KERN_INFO, "%s, %s, bs=%lu, fs=%lu, gc=%lu, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) "bpg=%lu, ipg=%lu, mo=%04lx]",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) EXT2FS_VERSION, EXT2FS_DATE, sb->s_blocksize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) sbi->s_frag_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) sbi->s_groups_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) EXT2_BLOCKS_PER_GROUP(sb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) EXT2_INODES_PER_GROUP(sb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) sbi->s_mount_opt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) static int ext2_check_descriptors(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) struct ext2_sb_info *sbi = EXT2_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) ext2_debug ("Checking group descriptors");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) for (i = 0; i < sbi->s_groups_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) struct ext2_group_desc *gdp = ext2_get_group_desc(sb, i, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) ext2_fsblk_t first_block = ext2_group_first_block_no(sb, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) ext2_fsblk_t last_block = ext2_group_last_block_no(sb, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) le32_to_cpu(gdp->bg_block_bitmap) > last_block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) ext2_error (sb, "ext2_check_descriptors",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) "Block bitmap for group %d"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) " not in group (block %lu)!",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) i, (unsigned long) le32_to_cpu(gdp->bg_block_bitmap));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) ext2_error (sb, "ext2_check_descriptors",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) "Inode bitmap for group %d"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) " not in group (block %lu)!",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) i, (unsigned long) le32_to_cpu(gdp->bg_inode_bitmap));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) last_block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) ext2_error (sb, "ext2_check_descriptors",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) "Inode table for group %d"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) " not in group (block %lu)!",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) i, (unsigned long) le32_to_cpu(gdp->bg_inode_table));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) * Maximal file size. There is a direct, and {,double-,triple-}indirect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) * We need to be 1 filesystem block less than the 2^32 sector limit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) static loff_t ext2_max_size(int bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) loff_t res = EXT2_NDIR_BLOCKS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) int meta_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) unsigned int upper_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) unsigned int ppb = 1 << (bits-2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) /* This is calculated to be the largest file size for a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) * dense, file such that the total number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) * sectors in the file, including data and all indirect blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) * does not exceed 2^32 -1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) * __u32 i_blocks representing the total number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) * 512 bytes blocks of the file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) upper_limit = (1LL << 32) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) /* total blocks in file system block size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) upper_limit >>= (bits - 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) /* Compute how many blocks we can address by block tree */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) res += 1LL << (bits-2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) res += 1LL << (2*(bits-2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) res += 1LL << (3*(bits-2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) /* Compute how many metadata blocks are needed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) meta_blocks = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) meta_blocks += 1 + ppb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) meta_blocks += 1 + ppb + ppb * ppb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) /* Does block tree limit file size? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) if (res + meta_blocks <= upper_limit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) goto check_lfs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) res = upper_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) /* How many metadata blocks are needed for addressing upper_limit? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) upper_limit -= EXT2_NDIR_BLOCKS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) /* indirect blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) meta_blocks = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) upper_limit -= ppb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) /* double indirect blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) if (upper_limit < ppb * ppb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) meta_blocks += 1 + DIV_ROUND_UP(upper_limit, ppb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) res -= meta_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) goto check_lfs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) meta_blocks += 1 + ppb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) upper_limit -= ppb * ppb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) /* tripple indirect blocks for the rest */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) meta_blocks += 1 + DIV_ROUND_UP(upper_limit, ppb) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) DIV_ROUND_UP(upper_limit, ppb*ppb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) res -= meta_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) check_lfs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) res <<= bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (res > MAX_LFS_FILESIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) res = MAX_LFS_FILESIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) static unsigned long descriptor_loc(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) unsigned long logic_sb_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) int nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) struct ext2_sb_info *sbi = EXT2_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) unsigned long bg, first_meta_bg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) if (!EXT2_HAS_INCOMPAT_FEATURE(sb, EXT2_FEATURE_INCOMPAT_META_BG) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) nr < first_meta_bg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) return (logic_sb_block + nr + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) bg = sbi->s_desc_per_block * nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) return ext2_group_first_block_no(sb, bg) + ext2_bg_has_super(sb, bg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) static int ext2_fill_super(struct super_block *sb, void *data, int silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) struct buffer_head * bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) struct ext2_sb_info * sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) struct ext2_super_block * es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) struct inode *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) unsigned long block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) unsigned long sb_block = get_sb_block(&data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) unsigned long logic_sb_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) unsigned long offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) unsigned long def_mount_opts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) long ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) int blocksize = BLOCK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) int db_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) __le32 features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) struct ext2_mount_options opts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) if (!sbi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) sbi->s_blockgroup_lock =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) if (!sbi->s_blockgroup_lock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) kfree(sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) sb->s_fs_info = sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) sbi->s_sb_block = sb_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) sbi->s_daxdev = dax_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) spin_lock_init(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) * See what the current blocksize for the device is, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) * use that as the blocksize. Otherwise (or if the blocksize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) * is smaller than the default) use the default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) * This is important for devices that have a hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) * sectorsize that is larger than the default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) blocksize = sb_min_blocksize(sb, BLOCK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) if (!blocksize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) ext2_msg(sb, KERN_ERR, "error: unable to set blocksize");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) goto failed_sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) * If the superblock doesn't start on a hardware sector boundary,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) * calculate the offset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) if (blocksize != BLOCK_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) logic_sb_block = (sb_block*BLOCK_SIZE) / blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) offset = (sb_block*BLOCK_SIZE) % blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) logic_sb_block = sb_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) if (!(bh = sb_bread(sb, logic_sb_block))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) ext2_msg(sb, KERN_ERR, "error: unable to read superblock");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) goto failed_sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) * Note: s_es must be initialized as soon as possible because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) * some ext2 macro-instructions depend on its value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) es = (struct ext2_super_block *) (((char *)bh->b_data) + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) sbi->s_es = es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) sb->s_magic = le16_to_cpu(es->s_magic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) if (sb->s_magic != EXT2_SUPER_MAGIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) goto cantfind_ext2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) opts.s_mount_opt = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) /* Set defaults before we parse the mount options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) if (def_mount_opts & EXT2_DEFM_DEBUG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) set_opt(opts.s_mount_opt, DEBUG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) if (def_mount_opts & EXT2_DEFM_BSDGROUPS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) set_opt(opts.s_mount_opt, GRPID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) if (def_mount_opts & EXT2_DEFM_UID16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) set_opt(opts.s_mount_opt, NO_UID32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) #ifdef CONFIG_EXT2_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) if (def_mount_opts & EXT2_DEFM_XATTR_USER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) set_opt(opts.s_mount_opt, XATTR_USER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) #ifdef CONFIG_EXT2_FS_POSIX_ACL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) if (def_mount_opts & EXT2_DEFM_ACL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) set_opt(opts.s_mount_opt, POSIX_ACL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_PANIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) set_opt(opts.s_mount_opt, ERRORS_PANIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) else if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_CONTINUE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) set_opt(opts.s_mount_opt, ERRORS_CONT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) set_opt(opts.s_mount_opt, ERRORS_RO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) opts.s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) opts.s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) set_opt(opts.s_mount_opt, RESERVATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) if (!parse_options((char *) data, sb, &opts))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) sbi->s_mount_opt = opts.s_mount_opt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) sbi->s_resuid = opts.s_resuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) sbi->s_resgid = opts.s_resgid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) sb->s_iflags |= SB_I_CGROUPWB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) (EXT2_HAS_COMPAT_FEATURE(sb, ~0U) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) EXT2_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) EXT2_HAS_INCOMPAT_FEATURE(sb, ~0U)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) ext2_msg(sb, KERN_WARNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) "warning: feature flags set on rev 0 fs, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) "running e2fsck is recommended");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) * Check feature flags regardless of the revision level, since we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) * previously didn't change the revision level when setting the flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) * so there is a chance incompat flags are set on a rev 0 filesystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) features = EXT2_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) if (features) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) ext2_msg(sb, KERN_ERR, "error: couldn't mount because of "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) "unsupported optional features (%x)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) le32_to_cpu(features));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) if (!sb_rdonly(sb) && (features = EXT2_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP))){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) ext2_msg(sb, KERN_ERR, "error: couldn't mount RDWR because of "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) "unsupported optional features (%x)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) le32_to_cpu(features));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) if (test_opt(sb, DAX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) if (!bdev_dax_supported(sb->s_bdev, blocksize)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) "DAX unsupported by block device. Turning off DAX.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) clear_opt(sbi->s_mount_opt, DAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) /* If the blocksize doesn't match, re-read the thing.. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) if (sb->s_blocksize != blocksize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) if (!sb_set_blocksize(sb, blocksize)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) "error: bad blocksize %d", blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) goto failed_sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) logic_sb_block = (sb_block*BLOCK_SIZE) / blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) offset = (sb_block*BLOCK_SIZE) % blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) bh = sb_bread(sb, logic_sb_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) if(!bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) ext2_msg(sb, KERN_ERR, "error: couldn't read"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) "superblock on 2nd try");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) goto failed_sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) es = (struct ext2_super_block *) (((char *)bh->b_data) + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) sbi->s_es = es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) if (es->s_magic != cpu_to_le16(EXT2_SUPER_MAGIC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) ext2_msg(sb, KERN_ERR, "error: magic mismatch");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) sb->s_maxbytes = ext2_max_size(sb->s_blocksize_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) sb->s_max_links = EXT2_LINK_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) sb->s_time_min = S32_MIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) sb->s_time_max = S32_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) sbi->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) sbi->s_first_ino = EXT2_GOOD_OLD_FIRST_INO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) if ((sbi->s_inode_size < EXT2_GOOD_OLD_INODE_SIZE) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) !is_power_of_2(sbi->s_inode_size) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) (sbi->s_inode_size > blocksize)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) "error: unsupported inode size: %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) sbi->s_inode_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) sbi->s_frag_size = EXT2_MIN_FRAG_SIZE <<
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) le32_to_cpu(es->s_log_frag_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) if (sbi->s_frag_size == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) goto cantfind_ext2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) sbi->s_frags_per_block = sb->s_blocksize / sbi->s_frag_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) if (sbi->s_inodes_per_block == 0 || sbi->s_inodes_per_group == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) goto cantfind_ext2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) sbi->s_itb_per_group = sbi->s_inodes_per_group /
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) sbi->s_inodes_per_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) sbi->s_desc_per_block = sb->s_blocksize /
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) sizeof (struct ext2_group_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) sbi->s_sbh = bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) sbi->s_mount_state = le16_to_cpu(es->s_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) sbi->s_addr_per_block_bits =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) ilog2 (EXT2_ADDR_PER_BLOCK(sb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) sbi->s_desc_per_block_bits =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) ilog2 (EXT2_DESC_PER_BLOCK(sb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) if (sb->s_magic != EXT2_SUPER_MAGIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) goto cantfind_ext2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) if (sb->s_blocksize != bh->b_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) ext2_msg(sb, KERN_ERR, "error: unsupported blocksize");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) if (sb->s_blocksize != sbi->s_frag_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) "error: fragsize %lu != blocksize %lu"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) "(not supported yet)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) sbi->s_frag_size, sb->s_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) if (sbi->s_blocks_per_group > sb->s_blocksize * 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) "error: #blocks per group too big: %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) sbi->s_blocks_per_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) if (sbi->s_frags_per_group > sb->s_blocksize * 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) "error: #fragments per group too big: %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) sbi->s_frags_per_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) if (sbi->s_inodes_per_group > sb->s_blocksize * 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) "error: #inodes per group too big: %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) sbi->s_inodes_per_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) if (EXT2_BLOCKS_PER_GROUP(sb) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) goto cantfind_ext2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) le32_to_cpu(es->s_first_data_block) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) / EXT2_BLOCKS_PER_GROUP(sb)) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) db_count = (sbi->s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) /
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) EXT2_DESC_PER_BLOCK(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) sbi->s_group_desc = kmalloc_array (db_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) sizeof(struct buffer_head *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) if (sbi->s_group_desc == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) ext2_msg(sb, KERN_ERR, "error: not enough memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) bgl_lock_init(sbi->s_blockgroup_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) sbi->s_debts = kcalloc(sbi->s_groups_count, sizeof(*sbi->s_debts), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) if (!sbi->s_debts) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) ext2_msg(sb, KERN_ERR, "error: not enough memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) goto failed_mount_group_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) for (i = 0; i < db_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) block = descriptor_loc(sb, logic_sb_block, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) sbi->s_group_desc[i] = sb_bread(sb, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) if (!sbi->s_group_desc[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) for (j = 0; j < i; j++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) brelse (sbi->s_group_desc[j]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) "error: unable to read group descriptors");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) goto failed_mount_group_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) if (!ext2_check_descriptors (sb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) ext2_msg(sb, KERN_ERR, "group descriptors corrupted");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) goto failed_mount2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) sbi->s_gdb_count = db_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) get_random_bytes(&sbi->s_next_generation, sizeof(u32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) spin_lock_init(&sbi->s_next_gen_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) /* per fileystem reservation list head & lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) spin_lock_init(&sbi->s_rsv_window_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) sbi->s_rsv_window_root = RB_ROOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) * Add a single, static dummy reservation to the start of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) * reservation window list --- it gives us a placeholder for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) * append-at-start-of-list which makes the allocation logic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) * _much_ simpler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) sbi->s_rsv_window_head.rsv_start = EXT2_RESERVE_WINDOW_NOT_ALLOCATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) sbi->s_rsv_window_head.rsv_end = EXT2_RESERVE_WINDOW_NOT_ALLOCATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) sbi->s_rsv_window_head.rsv_alloc_hit = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) sbi->s_rsv_window_head.rsv_goal_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) ext2_rsv_window_add(sb, &sbi->s_rsv_window_head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) err = percpu_counter_init(&sbi->s_freeblocks_counter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) ext2_count_free_blocks(sb), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) err = percpu_counter_init(&sbi->s_freeinodes_counter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) ext2_count_free_inodes(sb), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) err = percpu_counter_init(&sbi->s_dirs_counter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) ext2_count_dirs(sb), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) ret = err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) ext2_msg(sb, KERN_ERR, "error: insufficient memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) goto failed_mount3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) #ifdef CONFIG_EXT2_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) sbi->s_ea_block_cache = ext2_xattr_create_cache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) if (!sbi->s_ea_block_cache) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) ext2_msg(sb, KERN_ERR, "Failed to create ea_block_cache");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) goto failed_mount3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) * set up enough so that it can read an inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) sb->s_op = &ext2_sops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) sb->s_export_op = &ext2_export_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) sb->s_xattr = ext2_xattr_handlers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) #ifdef CONFIG_QUOTA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) sb->dq_op = &dquot_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) sb->s_qcop = &ext2_quotactl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) root = ext2_iget(sb, EXT2_ROOT_INO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) if (IS_ERR(root)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) ret = PTR_ERR(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) goto failed_mount3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) iput(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) ext2_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) goto failed_mount3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) sb->s_root = d_make_root(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) if (!sb->s_root) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) ext2_msg(sb, KERN_ERR, "error: get root inode failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) goto failed_mount3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) if (EXT2_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) ext2_msg(sb, KERN_WARNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) "warning: mounting ext3 filesystem as ext2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) if (ext2_setup_super (sb, es, sb_rdonly(sb)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) sb->s_flags |= SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) ext2_write_super(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) cantfind_ext2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) "error: can't find an ext2 filesystem on dev %s.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) sb->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) goto failed_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) failed_mount3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) ext2_xattr_destroy_cache(sbi->s_ea_block_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) percpu_counter_destroy(&sbi->s_freeblocks_counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) percpu_counter_destroy(&sbi->s_freeinodes_counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) percpu_counter_destroy(&sbi->s_dirs_counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) failed_mount2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) for (i = 0; i < db_count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) brelse(sbi->s_group_desc[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) failed_mount_group_desc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) kfree(sbi->s_group_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) kfree(sbi->s_debts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) failed_mount:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) failed_sbi:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) sb->s_fs_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) kfree(sbi->s_blockgroup_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) kfree(sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) fs_put_dax(dax_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) static void ext2_clear_super_error(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) struct buffer_head *sbh = EXT2_SB(sb)->s_sbh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) if (buffer_write_io_error(sbh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) * Oh, dear. A previous attempt to write the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) * superblock failed. This could happen because the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) * USB device was yanked out. Or it could happen to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) * be a transient write error and maybe the block will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) * be remapped. Nothing we can do but to retry the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) * write and hope for the best.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) ext2_msg(sb, KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) "previous I/O error to superblock detected");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) clear_buffer_write_io_error(sbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) set_buffer_uptodate(sbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) int wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) ext2_clear_super_error(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) spin_lock(&EXT2_SB(sb)->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) es->s_free_blocks_count = cpu_to_le32(ext2_count_free_blocks(sb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) es->s_free_inodes_count = cpu_to_le32(ext2_count_free_inodes(sb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) es->s_wtime = cpu_to_le32(ktime_get_real_seconds());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) /* unlock before we do IO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) spin_unlock(&EXT2_SB(sb)->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) if (wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) sync_dirty_buffer(EXT2_SB(sb)->s_sbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) * In the second extended file system, it is not necessary to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) * write the super block since we use a mapping of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) * disk super block in a buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) * However, this function is still used to set the fs valid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) * flags to 0. We need to set this flag to 0 since the fs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) * may have been checked while mounted and e2fsck may have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) * set s_state to EXT2_VALID_FS after some corrections.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) static int ext2_sync_fs(struct super_block *sb, int wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) struct ext2_sb_info *sbi = EXT2_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) struct ext2_super_block *es = EXT2_SB(sb)->s_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) * Write quota structures to quota file, sync_blockdev() will write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) * them to disk later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) dquot_writeback_dquots(sb, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) spin_lock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) if (es->s_state & cpu_to_le16(EXT2_VALID_FS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) ext2_debug("setting valid to 0\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) es->s_state &= cpu_to_le16(~EXT2_VALID_FS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) ext2_sync_super(sb, es, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) static int ext2_freeze(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) struct ext2_sb_info *sbi = EXT2_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) * Open but unlinked files present? Keep EXT2_VALID_FS flag cleared
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) * because we have unattached inodes and thus filesystem is not fully
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) * consistent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) if (atomic_long_read(&sb->s_remove_count)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) ext2_sync_fs(sb, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) /* Set EXT2_FS_VALID flag */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) spin_lock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) sbi->s_es->s_state = cpu_to_le16(sbi->s_mount_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) ext2_sync_super(sb, sbi->s_es, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) static int ext2_unfreeze(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) /* Just write sb to clear EXT2_VALID_FS flag */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) ext2_write_super(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) static void ext2_write_super(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) if (!sb_rdonly(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) ext2_sync_fs(sb, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) static int ext2_remount (struct super_block * sb, int * flags, char * data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) struct ext2_sb_info * sbi = EXT2_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) struct ext2_super_block * es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) struct ext2_mount_options new_opts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) sync_filesystem(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) spin_lock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) new_opts.s_mount_opt = sbi->s_mount_opt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) new_opts.s_resuid = sbi->s_resuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) new_opts.s_resgid = sbi->s_resgid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) if (!parse_options(data, sb, &new_opts))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) spin_lock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) es = sbi->s_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) if ((sbi->s_mount_opt ^ new_opts.s_mount_opt) & EXT2_MOUNT_DAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) ext2_msg(sb, KERN_WARNING, "warning: refusing change of "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) "dax flag with busy inodes while remounting");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) new_opts.s_mount_opt ^= EXT2_MOUNT_DAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) goto out_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) if (*flags & SB_RDONLY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) if (le16_to_cpu(es->s_state) & EXT2_VALID_FS ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) !(sbi->s_mount_state & EXT2_VALID_FS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) goto out_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) * OK, we are remounting a valid rw partition rdonly, so set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) * the rdonly flag and then mark the partition as valid again.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) es->s_state = cpu_to_le16(sbi->s_mount_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) es->s_mtime = cpu_to_le32(ktime_get_real_seconds());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) err = dquot_suspend(sb, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) ext2_sync_super(sb, es, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) __le32 ret = EXT2_HAS_RO_COMPAT_FEATURE(sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) ~EXT2_FEATURE_RO_COMPAT_SUPP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) ext2_msg(sb, KERN_WARNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) "warning: couldn't remount RDWR because of "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) "unsupported optional features (%x).",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) le32_to_cpu(ret));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) return -EROFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) * Mounting a RDONLY partition read-write, so reread and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) * store the current valid flag. (It may have been changed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) * by e2fsck since we originally mounted the partition.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) sbi->s_mount_state = le16_to_cpu(es->s_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) if (!ext2_setup_super (sb, es, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) sb->s_flags &= ~SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) ext2_write_super(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) dquot_resume(sb, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) spin_lock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) out_set:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) sbi->s_mount_opt = new_opts.s_mount_opt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) sbi->s_resuid = new_opts.s_resuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) sbi->s_resgid = new_opts.s_resgid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) struct super_block *sb = dentry->d_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) struct ext2_sb_info *sbi = EXT2_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) struct ext2_super_block *es = sbi->s_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) u64 fsid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) spin_lock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) if (test_opt (sb, MINIX_DF))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) sbi->s_overhead_last = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) unsigned long i, overhead = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) smp_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) * Compute the overhead (FS structures). This is constant
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) * for a given filesystem unless the number of block groups
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) * changes so we cache the previous value until it does.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) * All of the blocks before first_data_block are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) * overhead
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) overhead = le32_to_cpu(es->s_first_data_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) * Add the overhead attributed to the superblock and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) * block group descriptors. If the sparse superblocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) * feature is turned on, then not all groups have this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) for (i = 0; i < sbi->s_groups_count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) overhead += ext2_bg_has_super(sb, i) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) ext2_bg_num_gdb(sb, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) * Every block group has an inode bitmap, a block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) * bitmap, and an inode table.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) overhead += (sbi->s_groups_count *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) (2 + sbi->s_itb_per_group));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) sbi->s_overhead_last = overhead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) buf->f_type = EXT2_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) buf->f_bsize = sb->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) buf->f_bfree = ext2_count_free_blocks(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) buf->f_bavail = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) buf->f_files = le32_to_cpu(es->s_inodes_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) buf->f_ffree = ext2_count_free_inodes(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) buf->f_namelen = EXT2_NAME_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) fsid = le64_to_cpup((void *)es->s_uuid) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) le64_to_cpup((void *)es->s_uuid + sizeof(u64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) buf->f_fsid = u64_to_fsid(fsid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) spin_unlock(&sbi->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) static struct dentry *ext2_mount(struct file_system_type *fs_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) int flags, const char *dev_name, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) return mount_bdev(fs_type, flags, dev_name, data, ext2_fill_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) #ifdef CONFIG_QUOTA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) /* Read data from quotafile - avoid pagecache and such because we cannot afford
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) * acquiring the locks... As quota files are never truncated and quota code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) * itself serializes the operations (and no one else should touch the files)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) * we don't have to be afraid of races */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) size_t len, loff_t off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) struct inode *inode = sb_dqopt(sb)->files[type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) sector_t blk = off >> EXT2_BLOCK_SIZE_BITS(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) int offset = off & (sb->s_blocksize - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) int tocopy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) size_t toread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) struct buffer_head tmp_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) loff_t i_size = i_size_read(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) if (off > i_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) if (off+len > i_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) len = i_size-off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) toread = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) while (toread > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) tocopy = sb->s_blocksize - offset < toread ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) sb->s_blocksize - offset : toread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) tmp_bh.b_state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) tmp_bh.b_size = sb->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) err = ext2_get_block(inode, blk, &tmp_bh, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) if (!buffer_mapped(&tmp_bh)) /* A hole? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) memset(data, 0, tocopy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) bh = sb_bread(sb, tmp_bh.b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) memcpy(data, bh->b_data+offset, tocopy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) toread -= tocopy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) data += tocopy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) blk++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) /* Write to quotafile */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) static ssize_t ext2_quota_write(struct super_block *sb, int type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) const char *data, size_t len, loff_t off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) struct inode *inode = sb_dqopt(sb)->files[type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) sector_t blk = off >> EXT2_BLOCK_SIZE_BITS(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) int offset = off & (sb->s_blocksize - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) int tocopy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) size_t towrite = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) struct buffer_head tmp_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) while (towrite > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) tocopy = sb->s_blocksize - offset < towrite ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) sb->s_blocksize - offset : towrite;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) tmp_bh.b_state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) tmp_bh.b_size = sb->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) err = ext2_get_block(inode, blk, &tmp_bh, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) if (offset || tocopy != EXT2_BLOCK_SIZE(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) bh = sb_bread(sb, tmp_bh.b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) bh = sb_getblk(sb, tmp_bh.b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) if (unlikely(!bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) lock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) memcpy(bh->b_data+offset, data, tocopy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) flush_dcache_page(bh->b_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) set_buffer_uptodate(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) mark_buffer_dirty(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) unlock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) towrite -= tocopy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) data += tocopy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) blk++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) if (len == towrite)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) if (inode->i_size < off+len-towrite)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) i_size_write(inode, off+len-towrite);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) inode_inc_iversion(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) inode->i_mtime = inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) return len - towrite;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) static int ext2_quota_on(struct super_block *sb, int type, int format_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) const struct path *path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) err = dquot_quota_on(sb, type, format_id, path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) inode = d_inode(path->dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) EXT2_I(inode)->i_flags |= EXT2_NOATIME_FL | EXT2_IMMUTABLE_FL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) inode_set_flags(inode, S_NOATIME | S_IMMUTABLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) S_NOATIME | S_IMMUTABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) static int ext2_quota_off(struct super_block *sb, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) struct inode *inode = sb_dqopt(sb)->files[type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) if (!inode || !igrab(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) err = dquot_quota_off(sb, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) goto out_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) EXT2_I(inode)->i_flags &= ~(EXT2_NOATIME_FL | EXT2_IMMUTABLE_FL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) out_put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) return dquot_quota_off(sb, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) static struct file_system_type ext2_fs_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) .name = "ext2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) .mount = ext2_mount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) .kill_sb = kill_block_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) .fs_flags = FS_REQUIRES_DEV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) MODULE_ALIAS_FS("ext2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) static int __init init_ext2_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) err = init_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) err = register_filesystem(&ext2_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) destroy_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) static void __exit exit_ext2_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) unregister_filesystem(&ext2_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) destroy_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) MODULE_AUTHOR("Remy Card and others");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) MODULE_DESCRIPTION("Second Extended Filesystem");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) module_init(init_ext2_fs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) module_exit(exit_ext2_fs)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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