^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/fs/ext2/ioctl.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "ext2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/capability.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/current.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) long ext2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct inode *inode = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct ext2_inode_info *ei = EXT2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) unsigned int flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) unsigned short rsv_window_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) ext2_debug ("cmd = %u, arg = %lu\n", cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) case EXT2_IOC_GETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) flags = ei->i_flags & EXT2_FL_USER_VISIBLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return put_user(flags, (int __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) case EXT2_IOC_SETFLAGS: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) unsigned int oldflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) ret = mnt_want_write_file(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (!inode_owner_or_capable(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) ret = -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) goto setflags_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (get_user(flags, (int __user *) arg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) goto setflags_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) flags = ext2_mask_flags(inode->i_mode, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* Is it quota file? Do not allow user to mess with it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (IS_NOQUOTA(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) ret = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) goto setflags_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) oldflags = ei->i_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) ret = vfs_ioc_setflags_prepare(inode, oldflags, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) goto setflags_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) flags = flags & EXT2_FL_USER_MODIFIABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) flags |= oldflags & ~EXT2_FL_USER_MODIFIABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ei->i_flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) ext2_set_inode_flags(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) setflags_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) mnt_drop_write_file(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) case EXT2_IOC_GETVERSION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return put_user(inode->i_generation, (int __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) case EXT2_IOC_SETVERSION: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) __u32 generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (!inode_owner_or_capable(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ret = mnt_want_write_file(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (get_user(generation, (int __user *) arg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) goto setversion_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) inode->i_generation = generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) setversion_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) mnt_drop_write_file(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) case EXT2_IOC_GETRSVSZ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (test_opt(inode->i_sb, RESERVATION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) && S_ISREG(inode->i_mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) && ei->i_block_alloc_info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) rsv_window_size = ei->i_block_alloc_info->rsv_window_node.rsv_goal_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return put_user(rsv_window_size, (int __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) case EXT2_IOC_SETRSVSZ: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (!test_opt(inode->i_sb, RESERVATION) ||!S_ISREG(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (!inode_owner_or_capable(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (get_user(rsv_window_size, (int __user *)arg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) ret = mnt_want_write_file(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (rsv_window_size > EXT2_MAX_RESERVE_BLOCKS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) rsv_window_size = EXT2_MAX_RESERVE_BLOCKS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * need to allocate reservation structure for this inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * before set the window size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * XXX What lock should protect the rsv_goal_size?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * Accessed in ext2_get_block only. ext3 uses i_truncate.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) mutex_lock(&ei->truncate_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (!ei->i_block_alloc_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) ext2_init_block_alloc_info(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (ei->i_block_alloc_info){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) struct ext2_reserve_window_node *rsv = &ei->i_block_alloc_info->rsv_window_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) rsv->rsv_goal_size = rsv_window_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) mutex_unlock(&ei->truncate_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) mnt_drop_write_file(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) long ext2_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /* These are just misnamed, they actually get/put from/to user an int */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) case EXT2_IOC32_GETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) cmd = EXT2_IOC_GETFLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) case EXT2_IOC32_SETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) cmd = EXT2_IOC_SETFLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) case EXT2_IOC32_GETVERSION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) cmd = EXT2_IOC_GETVERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) case EXT2_IOC32_SETVERSION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) cmd = EXT2_IOC_SETVERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) return -ENOIOCTLCMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return ext2_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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