Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2 | * linux/fs/ext4/ioctl.c |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 1993, 1994, 1995 |
| 5 | * Remy Card (card@masi.ibp.fr) |
| 6 | * Laboratoire MASI - Institut Blaise Pascal |
| 7 | * Universite Pierre et Marie Curie (Paris VI) |
| 8 | */ |
| 9 | |
| 10 | #include <linux/fs.h> |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 11 | #include <linux/jbd2.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 12 | #include <linux/capability.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 13 | #include <linux/time.h> |
| 14 | #include <linux/compat.h> |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 15 | #include <linux/mount.h> |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 16 | #include <linux/file.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 17 | #include <asm/uaccess.h> |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 18 | #include "ext4_jbd2.h" |
| 19 | #include "ext4.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 20 | |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 21 | #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) |
| 22 | |
Andi Kleen | 5cdd7b2 | 2008-04-29 22:03:54 -0400 | [diff] [blame] | 23 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 24 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 25 | struct inode *inode = file_inode(filp); |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 26 | struct super_block *sb = inode->i_sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 27 | struct ext4_inode_info *ei = EXT4_I(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 28 | unsigned int flags; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 29 | |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 30 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 31 | |
| 32 | switch (cmd) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 33 | case EXT4_IOC_GETFLAGS: |
Jan Kara | ff9ddf7 | 2007-07-18 09:24:20 -0400 | [diff] [blame] | 34 | ext4_get_inode_flags(ei); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 35 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 36 | return put_user(flags, (int __user *) arg); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 37 | case EXT4_IOC_SETFLAGS: { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 38 | handle_t *handle = NULL; |
Aneesh Kumar K.V | 4db46fc | 2008-10-08 23:34:06 -0400 | [diff] [blame] | 39 | int err, migrate = 0; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 40 | struct ext4_iloc iloc; |
Theodore Ts'o | 7990696 | 2012-05-31 23:46:01 -0400 | [diff] [blame] | 41 | unsigned int oldflags, mask, i; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 42 | unsigned int jflag; |
| 43 | |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 44 | if (!inode_owner_or_capable(inode)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 45 | return -EACCES; |
| 46 | |
| 47 | if (get_user(flags, (int __user *) arg)) |
| 48 | return -EFAULT; |
| 49 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 50 | err = mnt_want_write_file(filp); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 51 | if (err) |
| 52 | return err; |
| 53 | |
Duane Griffin | 2dc6b0d | 2009-02-15 18:09:20 -0500 | [diff] [blame] | 54 | flags = ext4_mask_flags(inode->i_mode, flags); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 55 | |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 56 | err = -EPERM; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 57 | mutex_lock(&inode->i_mutex); |
Jan Kara | e47776a | 2007-11-14 16:58:56 -0800 | [diff] [blame] | 58 | /* Is it quota file? Do not allow user to mess with it */ |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 59 | if (IS_NOQUOTA(inode)) |
| 60 | goto flags_out; |
| 61 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 62 | oldflags = ei->i_flags; |
| 63 | |
| 64 | /* The JOURNAL_DATA flag is modifiable only by root */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 65 | jflag = flags & EXT4_JOURNAL_DATA_FL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 66 | |
| 67 | /* |
| 68 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by |
| 69 | * the relevant capability. |
| 70 | * |
| 71 | * This test looks nicer. Thanks to Pauline Middelink |
| 72 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 73 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 74 | if (!capable(CAP_LINUX_IMMUTABLE)) |
| 75 | goto flags_out; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | /* |
| 79 | * The JOURNAL_DATA flag can only be changed by |
| 80 | * the relevant capability. |
| 81 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 82 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 83 | if (!capable(CAP_SYS_RESOURCE)) |
| 84 | goto flags_out; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 85 | } |
Theodore Ts'o | 996bb9f | 2013-04-03 22:04:52 -0400 | [diff] [blame^] | 86 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
Aneesh Kumar K.V | 4db46fc | 2008-10-08 23:34:06 -0400 | [diff] [blame] | 87 | migrate = 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 88 | |
Jiaying Zhang | c8d46e4 | 2010-02-24 09:52:53 -0500 | [diff] [blame] | 89 | if (flags & EXT4_EOFBLOCKS_FL) { |
| 90 | /* we don't support adding EOFBLOCKS flag */ |
| 91 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { |
| 92 | err = -EOPNOTSUPP; |
| 93 | goto flags_out; |
| 94 | } |
| 95 | } else if (oldflags & EXT4_EOFBLOCKS_FL) |
| 96 | ext4_truncate(inode); |
| 97 | |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 98 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 99 | if (IS_ERR(handle)) { |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 100 | err = PTR_ERR(handle); |
| 101 | goto flags_out; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 102 | } |
| 103 | if (IS_SYNC(inode)) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 104 | ext4_handle_sync(handle); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 105 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 106 | if (err) |
| 107 | goto flags_err; |
| 108 | |
Theodore Ts'o | 7990696 | 2012-05-31 23:46:01 -0400 | [diff] [blame] | 109 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
| 110 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) |
| 111 | continue; |
| 112 | if (mask & flags) |
| 113 | ext4_set_inode_flag(inode, i); |
| 114 | else |
| 115 | ext4_clear_inode_flag(inode, i); |
| 116 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 117 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 118 | ext4_set_inode_flags(inode); |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 119 | inode->i_ctime = ext4_current_time(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 120 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 121 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 122 | flags_err: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 123 | ext4_journal_stop(handle); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 124 | if (err) |
| 125 | goto flags_out; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 126 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 127 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) |
| 128 | err = ext4_change_inode_journal_flag(inode, jflag); |
Aneesh Kumar K.V | 4db46fc | 2008-10-08 23:34:06 -0400 | [diff] [blame] | 129 | if (err) |
| 130 | goto flags_out; |
Theodore Ts'o | 996bb9f | 2013-04-03 22:04:52 -0400 | [diff] [blame^] | 131 | if (migrate) { |
| 132 | if (flags & EXT4_EXTENTS_FL) |
| 133 | err = ext4_ext_migrate(inode); |
| 134 | else |
| 135 | err = ext4_ind_migrate(inode); |
| 136 | } |
| 137 | |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 138 | flags_out: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 139 | mutex_unlock(&inode->i_mutex); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 140 | mnt_drop_write_file(filp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 141 | return err; |
| 142 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 143 | case EXT4_IOC_GETVERSION: |
| 144 | case EXT4_IOC_GETVERSION_OLD: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 145 | return put_user(inode->i_generation, (int __user *) arg); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 146 | case EXT4_IOC_SETVERSION: |
| 147 | case EXT4_IOC_SETVERSION_OLD: { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 148 | handle_t *handle; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 149 | struct ext4_iloc iloc; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 150 | __u32 generation; |
| 151 | int err; |
| 152 | |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 153 | if (!inode_owner_or_capable(inode)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 154 | return -EPERM; |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 155 | |
Darrick J. Wong | 814525f | 2012-04-29 18:31:10 -0400 | [diff] [blame] | 156 | if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, |
| 157 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { |
| 158 | ext4_warning(sb, "Setting inode version is not " |
| 159 | "supported with metadata_csum enabled."); |
| 160 | return -ENOTTY; |
| 161 | } |
| 162 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 163 | err = mnt_want_write_file(filp); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 164 | if (err) |
| 165 | return err; |
| 166 | if (get_user(generation, (int __user *) arg)) { |
| 167 | err = -EFAULT; |
| 168 | goto setversion_out; |
| 169 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 170 | |
Djalal Harouni | 6c2155b | 2012-01-03 02:31:52 +0100 | [diff] [blame] | 171 | mutex_lock(&inode->i_mutex); |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 172 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 173 | if (IS_ERR(handle)) { |
| 174 | err = PTR_ERR(handle); |
Djalal Harouni | 6c2155b | 2012-01-03 02:31:52 +0100 | [diff] [blame] | 175 | goto unlock_out; |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 176 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 177 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 178 | if (err == 0) { |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 179 | inode->i_ctime = ext4_current_time(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 180 | inode->i_generation = generation; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 181 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 182 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 183 | ext4_journal_stop(handle); |
Djalal Harouni | 6c2155b | 2012-01-03 02:31:52 +0100 | [diff] [blame] | 184 | |
| 185 | unlock_out: |
| 186 | mutex_unlock(&inode->i_mutex); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 187 | setversion_out: |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 188 | mnt_drop_write_file(filp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 189 | return err; |
| 190 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 191 | case EXT4_IOC_GROUP_EXTEND: { |
| 192 | ext4_fsblk_t n_blocks_count; |
Peng Tao | ac046f1 | 2009-07-13 09:30:17 -0400 | [diff] [blame] | 193 | int err, err2=0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 194 | |
Yongqiang Yang | 8f82f84 | 2011-07-26 21:35:44 -0400 | [diff] [blame] | 195 | err = ext4_resize_begin(sb); |
| 196 | if (err) |
| 197 | return err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 198 | |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 199 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
| 200 | err = -EFAULT; |
| 201 | goto group_extend_out; |
| 202 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 203 | |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 204 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 205 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { |
| 206 | ext4_msg(sb, KERN_ERR, |
| 207 | "Online resizing not supported with bigalloc"); |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 208 | err = -EOPNOTSUPP; |
| 209 | goto group_extend_out; |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 210 | } |
| 211 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 212 | err = mnt_want_write_file(filp); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 213 | if (err) |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 214 | goto group_extend_out; |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 215 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 216 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
Peng Tao | ac046f1 | 2009-07-13 09:30:17 -0400 | [diff] [blame] | 217 | if (EXT4_SB(sb)->s_journal) { |
| 218 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
| 219 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
| 220 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
| 221 | } |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 222 | if (err == 0) |
| 223 | err = err2; |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 224 | mnt_drop_write_file(filp); |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 225 | group_extend_out: |
Yongqiang Yang | 8f82f84 | 2011-07-26 21:35:44 -0400 | [diff] [blame] | 226 | ext4_resize_end(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 227 | return err; |
| 228 | } |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 229 | |
| 230 | case EXT4_IOC_MOVE_EXT: { |
| 231 | struct move_extent me; |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 232 | struct fd donor; |
| 233 | int err; |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 234 | |
Akira Fujita | 4a58579 | 2009-12-06 23:38:31 -0500 | [diff] [blame] | 235 | if (!(filp->f_mode & FMODE_READ) || |
| 236 | !(filp->f_mode & FMODE_WRITE)) |
| 237 | return -EBADF; |
| 238 | |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 239 | if (copy_from_user(&me, |
| 240 | (struct move_extent __user *)arg, sizeof(me))) |
| 241 | return -EFAULT; |
Akira Fujita | 4a58579 | 2009-12-06 23:38:31 -0500 | [diff] [blame] | 242 | me.moved_len = 0; |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 243 | |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 244 | donor = fdget(me.donor_fd); |
| 245 | if (!donor.file) |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 246 | return -EBADF; |
| 247 | |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 248 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
Akira Fujita | 4a58579 | 2009-12-06 23:38:31 -0500 | [diff] [blame] | 249 | err = -EBADF; |
| 250 | goto mext_out; |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 251 | } |
| 252 | |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 253 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 254 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { |
| 255 | ext4_msg(sb, KERN_ERR, |
| 256 | "Online defrag not supported with bigalloc"); |
Al Viro | 399c9b8 | 2012-08-26 21:00:03 -0400 | [diff] [blame] | 257 | err = -EOPNOTSUPP; |
| 258 | goto mext_out; |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 259 | } |
| 260 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 261 | err = mnt_want_write_file(filp); |
Akira Fujita | 4a58579 | 2009-12-06 23:38:31 -0500 | [diff] [blame] | 262 | if (err) |
| 263 | goto mext_out; |
| 264 | |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 265 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 266 | me.donor_start, me.len, &me.moved_len); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 267 | mnt_drop_write_file(filp); |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 268 | |
Theodore Ts'o | 60e6679 | 2010-05-17 07:00:00 -0400 | [diff] [blame] | 269 | if (copy_to_user((struct move_extent __user *)arg, |
Akira Fujita | c437b27 | 2010-03-04 00:39:24 -0500 | [diff] [blame] | 270 | &me, sizeof(me))) |
Akira Fujita | 4a58579 | 2009-12-06 23:38:31 -0500 | [diff] [blame] | 271 | err = -EFAULT; |
| 272 | mext_out: |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 273 | fdput(donor); |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 274 | return err; |
| 275 | } |
| 276 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 277 | case EXT4_IOC_GROUP_ADD: { |
| 278 | struct ext4_new_group_data input; |
Peng Tao | ac046f1 | 2009-07-13 09:30:17 -0400 | [diff] [blame] | 279 | int err, err2=0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 280 | |
Yongqiang Yang | 8f82f84 | 2011-07-26 21:35:44 -0400 | [diff] [blame] | 281 | err = ext4_resize_begin(sb); |
| 282 | if (err) |
| 283 | return err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 284 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 285 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 286 | sizeof(input))) { |
| 287 | err = -EFAULT; |
| 288 | goto group_add_out; |
| 289 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 290 | |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 291 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 292 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { |
| 293 | ext4_msg(sb, KERN_ERR, |
| 294 | "Online resizing not supported with bigalloc"); |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 295 | err = -EOPNOTSUPP; |
| 296 | goto group_add_out; |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 297 | } |
| 298 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 299 | err = mnt_want_write_file(filp); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 300 | if (err) |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 301 | goto group_add_out; |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 302 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 303 | err = ext4_group_add(sb, &input); |
Peng Tao | ac046f1 | 2009-07-13 09:30:17 -0400 | [diff] [blame] | 304 | if (EXT4_SB(sb)->s_journal) { |
| 305 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
| 306 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
| 307 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
| 308 | } |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 309 | if (err == 0) |
| 310 | err = err2; |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 311 | mnt_drop_write_file(filp); |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 312 | if (!err && ext4_has_group_desc_csum(sb) && |
| 313 | test_opt(sb, INIT_INODE_TABLE)) |
| 314 | err = ext4_register_li_request(sb, input.group); |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 315 | group_add_out: |
Yongqiang Yang | 8f82f84 | 2011-07-26 21:35:44 -0400 | [diff] [blame] | 316 | ext4_resize_end(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 317 | return err; |
| 318 | } |
| 319 | |
Aneesh Kumar K.V | c14c6fd | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 320 | case EXT4_IOC_MIGRATE: |
Aneesh Kumar K.V | 2a43a87 | 2008-09-13 12:52:26 -0400 | [diff] [blame] | 321 | { |
| 322 | int err; |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 323 | if (!inode_owner_or_capable(inode)) |
Aneesh Kumar K.V | 2a43a87 | 2008-09-13 12:52:26 -0400 | [diff] [blame] | 324 | return -EACCES; |
| 325 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 326 | err = mnt_want_write_file(filp); |
Aneesh Kumar K.V | 2a43a87 | 2008-09-13 12:52:26 -0400 | [diff] [blame] | 327 | if (err) |
| 328 | return err; |
| 329 | /* |
| 330 | * inode_mutex prevent write and truncate on the file. |
| 331 | * Read still goes through. We take i_data_sem in |
| 332 | * ext4_ext_swap_inode_data before we switch the |
| 333 | * inode format to prevent read. |
| 334 | */ |
| 335 | mutex_lock(&(inode->i_mutex)); |
| 336 | err = ext4_ext_migrate(inode); |
| 337 | mutex_unlock(&(inode->i_mutex)); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 338 | mnt_drop_write_file(filp); |
Aneesh Kumar K.V | 2a43a87 | 2008-09-13 12:52:26 -0400 | [diff] [blame] | 339 | return err; |
| 340 | } |
Aneesh Kumar K.V | c14c6fd | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 341 | |
Theodore Ts'o | ccd2506 | 2009-02-26 01:04:07 -0500 | [diff] [blame] | 342 | case EXT4_IOC_ALLOC_DA_BLKS: |
| 343 | { |
| 344 | int err; |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 345 | if (!inode_owner_or_capable(inode)) |
Theodore Ts'o | ccd2506 | 2009-02-26 01:04:07 -0500 | [diff] [blame] | 346 | return -EACCES; |
| 347 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 348 | err = mnt_want_write_file(filp); |
Theodore Ts'o | ccd2506 | 2009-02-26 01:04:07 -0500 | [diff] [blame] | 349 | if (err) |
| 350 | return err; |
| 351 | err = ext4_alloc_da_blocks(inode); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 352 | mnt_drop_write_file(filp); |
Theodore Ts'o | ccd2506 | 2009-02-26 01:04:07 -0500 | [diff] [blame] | 353 | return err; |
| 354 | } |
| 355 | |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 356 | case EXT4_IOC_RESIZE_FS: { |
| 357 | ext4_fsblk_t n_blocks_count; |
| 358 | struct super_block *sb = inode->i_sb; |
| 359 | int err = 0, err2 = 0; |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 360 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 361 | |
| 362 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 363 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { |
| 364 | ext4_msg(sb, KERN_ERR, |
| 365 | "Online resizing not (yet) supported with bigalloc"); |
| 366 | return -EOPNOTSUPP; |
| 367 | } |
| 368 | |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 369 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
| 370 | sizeof(__u64))) { |
| 371 | return -EFAULT; |
| 372 | } |
| 373 | |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 374 | err = ext4_resize_begin(sb); |
| 375 | if (err) |
| 376 | return err; |
| 377 | |
Al Viro | 8cae6f7 | 2012-07-19 11:19:07 +0400 | [diff] [blame] | 378 | err = mnt_want_write_file(filp); |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 379 | if (err) |
| 380 | goto resizefs_out; |
| 381 | |
| 382 | err = ext4_resize_fs(sb, n_blocks_count); |
| 383 | if (EXT4_SB(sb)->s_journal) { |
| 384 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
| 385 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
| 386 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
| 387 | } |
| 388 | if (err == 0) |
| 389 | err = err2; |
Al Viro | 8cae6f7 | 2012-07-19 11:19:07 +0400 | [diff] [blame] | 390 | mnt_drop_write_file(filp); |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 391 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
| 392 | ext4_has_group_desc_csum(sb) && |
| 393 | test_opt(sb, INIT_INODE_TABLE)) |
| 394 | err = ext4_register_li_request(sb, o_group); |
| 395 | |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 396 | resizefs_out: |
| 397 | ext4_resize_end(sb); |
| 398 | return err; |
| 399 | } |
| 400 | |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 401 | case FITRIM: |
| 402 | { |
Lukas Czerner | 4143179 | 2011-02-23 12:42:32 -0500 | [diff] [blame] | 403 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 404 | struct fstrim_range range; |
| 405 | int ret = 0; |
| 406 | |
| 407 | if (!capable(CAP_SYS_ADMIN)) |
| 408 | return -EPERM; |
| 409 | |
Lukas Czerner | 4143179 | 2011-02-23 12:42:32 -0500 | [diff] [blame] | 410 | if (!blk_queue_discard(q)) |
| 411 | return -EOPNOTSUPP; |
| 412 | |
H Hartley Sweeten | e6705f7 | 2011-10-18 10:59:51 -0400 | [diff] [blame] | 413 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 414 | sizeof(range))) |
| 415 | return -EFAULT; |
| 416 | |
Lukas Czerner | 5c2ed62 | 2011-02-23 17:49:51 -0500 | [diff] [blame] | 417 | range.minlen = max((unsigned int)range.minlen, |
| 418 | q->limits.discard_granularity); |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 419 | ret = ext4_trim_fs(sb, &range); |
| 420 | if (ret < 0) |
| 421 | return ret; |
| 422 | |
H Hartley Sweeten | e6705f7 | 2011-10-18 10:59:51 -0400 | [diff] [blame] | 423 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 424 | sizeof(range))) |
| 425 | return -EFAULT; |
| 426 | |
| 427 | return 0; |
| 428 | } |
| 429 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 430 | default: |
| 431 | return -ENOTTY; |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | #ifdef CONFIG_COMPAT |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 436 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 437 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 438 | /* These are just misnamed, they actually get/put from/to user an int */ |
| 439 | switch (cmd) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 440 | case EXT4_IOC32_GETFLAGS: |
| 441 | cmd = EXT4_IOC_GETFLAGS; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 442 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 443 | case EXT4_IOC32_SETFLAGS: |
| 444 | cmd = EXT4_IOC_SETFLAGS; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 445 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 446 | case EXT4_IOC32_GETVERSION: |
| 447 | cmd = EXT4_IOC_GETVERSION; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 448 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 449 | case EXT4_IOC32_SETVERSION: |
| 450 | cmd = EXT4_IOC_SETVERSION; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 451 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 452 | case EXT4_IOC32_GROUP_EXTEND: |
| 453 | cmd = EXT4_IOC_GROUP_EXTEND; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 454 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 455 | case EXT4_IOC32_GETVERSION_OLD: |
| 456 | cmd = EXT4_IOC_GETVERSION_OLD; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 457 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 458 | case EXT4_IOC32_SETVERSION_OLD: |
| 459 | cmd = EXT4_IOC_SETVERSION_OLD; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 460 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 461 | case EXT4_IOC32_GETRSVSZ: |
| 462 | cmd = EXT4_IOC_GETRSVSZ; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 463 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 464 | case EXT4_IOC32_SETRSVSZ: |
| 465 | cmd = EXT4_IOC_SETRSVSZ; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 466 | break; |
Ben Hutchings | 4d92dc0 | 2010-05-17 06:00:00 -0400 | [diff] [blame] | 467 | case EXT4_IOC32_GROUP_ADD: { |
| 468 | struct compat_ext4_new_group_input __user *uinput; |
| 469 | struct ext4_new_group_input input; |
| 470 | mm_segment_t old_fs; |
| 471 | int err; |
| 472 | |
| 473 | uinput = compat_ptr(arg); |
| 474 | err = get_user(input.group, &uinput->group); |
| 475 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); |
| 476 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); |
| 477 | err |= get_user(input.inode_table, &uinput->inode_table); |
| 478 | err |= get_user(input.blocks_count, &uinput->blocks_count); |
| 479 | err |= get_user(input.reserved_blocks, |
| 480 | &uinput->reserved_blocks); |
| 481 | if (err) |
| 482 | return -EFAULT; |
| 483 | old_fs = get_fs(); |
| 484 | set_fs(KERNEL_DS); |
| 485 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, |
| 486 | (unsigned long) &input); |
| 487 | set_fs(old_fs); |
| 488 | return err; |
| 489 | } |
Christian Borntraeger | b684b2e | 2010-05-15 00:00:00 -0400 | [diff] [blame] | 490 | case EXT4_IOC_MOVE_EXT: |
Tao Ma | a56e69c | 2011-03-20 23:16:58 -0400 | [diff] [blame] | 491 | case FITRIM: |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 492 | case EXT4_IOC_RESIZE_FS: |
Christian Borntraeger | b684b2e | 2010-05-15 00:00:00 -0400 | [diff] [blame] | 493 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 494 | default: |
| 495 | return -ENOIOCTLCMD; |
| 496 | } |
Andi Kleen | 5cdd7b2 | 2008-04-29 22:03:54 -0400 | [diff] [blame] | 497 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 498 | } |
| 499 | #endif |