Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3 | * linux/fs/ext4/ialloc.c |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4 | * |
| 5 | * Copyright (C) 1992, 1993, 1994, 1995 |
| 6 | * Remy Card (card@masi.ibp.fr) |
| 7 | * Laboratoire MASI - Institut Blaise Pascal |
| 8 | * Universite Pierre et Marie Curie (Paris VI) |
| 9 | * |
| 10 | * BSD ufs-inspired inode and directory allocation by |
| 11 | * Stephen Tweedie (sct@redhat.com), 1993 |
| 12 | * Big-endian to little-endian byte-swapping/bitmaps by |
| 13 | * David S. Miller (davem@caip.rutgers.edu), 1995 |
| 14 | */ |
| 15 | |
| 16 | #include <linux/time.h> |
| 17 | #include <linux/fs.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 18 | #include <linux/stat.h> |
| 19 | #include <linux/string.h> |
| 20 | #include <linux/quotaops.h> |
| 21 | #include <linux/buffer_head.h> |
| 22 | #include <linux/random.h> |
| 23 | #include <linux/bitops.h> |
Mingming Cao | 3a5b2ec | 2006-10-11 01:21:05 -0700 | [diff] [blame] | 24 | #include <linux/blkdev.h> |
Ingo Molnar | 5b825c3 | 2017-02-02 17:54:15 +0100 | [diff] [blame] | 25 | #include <linux/cred.h> |
| 26 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 27 | #include <asm/byteorder.h> |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 28 | |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 29 | #include "ext4.h" |
| 30 | #include "ext4_jbd2.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 31 | #include "xattr.h" |
| 32 | #include "acl.h" |
| 33 | |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 34 | #include <trace/events/ext4.h> |
| 35 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 36 | /* |
| 37 | * ialloc.c contains the inodes allocation and deallocation routines |
| 38 | */ |
| 39 | |
| 40 | /* |
| 41 | * The free inodes are managed by bitmaps. A file system contains several |
| 42 | * blocks groups. Each group contains 1 bitmap block for blocks, 1 bitmap |
| 43 | * block for inodes, N blocks for the inode table and data blocks. |
| 44 | * |
| 45 | * The file system contains group descriptors which are located after the |
| 46 | * super block. Each descriptor contains the number of the bitmap block and |
| 47 | * the free blocks count in the block. |
| 48 | */ |
| 49 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 50 | /* |
| 51 | * To avoid calling the atomic setbit hundreds or thousands of times, we only |
| 52 | * need to use it within a single byte (to ensure we get endianness right). |
| 53 | * We can use memset for the rest of the bitmap as there are no other users. |
| 54 | */ |
Theodore Ts'o | 61d0867 | 2010-10-27 21:30:15 -0400 | [diff] [blame] | 55 | void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap) |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 56 | { |
| 57 | int i; |
| 58 | |
| 59 | if (start_bit >= end_bit) |
| 60 | return; |
| 61 | |
| 62 | ext4_debug("mark end bits +%d through +%d used\n", start_bit, end_bit); |
| 63 | for (i = start_bit; i < ((start_bit + 7) & ~7UL); i++) |
| 64 | ext4_set_bit(i, bitmap); |
| 65 | if (i < end_bit) |
| 66 | memset(bitmap + (i >> 3), 0xff, (end_bit - i) >> 3); |
| 67 | } |
| 68 | |
Theodore Ts'o | 813e572 | 2012-02-20 17:52:46 -0500 | [diff] [blame] | 69 | void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate) |
| 70 | { |
| 71 | if (uptodate) { |
| 72 | set_buffer_uptodate(bh); |
| 73 | set_bitmap_uptodate(bh); |
| 74 | } |
| 75 | unlock_buffer(bh); |
| 76 | put_bh(bh); |
| 77 | } |
| 78 | |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 79 | static int ext4_validate_inode_bitmap(struct super_block *sb, |
| 80 | struct ext4_group_desc *desc, |
| 81 | ext4_group_t block_group, |
| 82 | struct buffer_head *bh) |
| 83 | { |
| 84 | ext4_fsblk_t blk; |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 85 | struct ext4_group_info *grp; |
| 86 | |
| 87 | if (EXT4_SB(sb)->s_mount_state & EXT4_FC_REPLAY) |
| 88 | return 0; |
| 89 | |
| 90 | grp = ext4_get_group_info(sb, block_group); |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 91 | |
| 92 | if (buffer_verified(bh)) |
| 93 | return 0; |
Theodore Ts'o | 5354b2a | 2023-04-29 00:06:28 -0400 | [diff] [blame] | 94 | if (!grp || EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 95 | return -EFSCORRUPTED; |
| 96 | |
| 97 | ext4_lock_group(sb, block_group); |
Theodore Ts'o | 8d5a803 | 2018-07-12 19:08:05 -0400 | [diff] [blame] | 98 | if (buffer_verified(bh)) |
| 99 | goto verified; |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 100 | blk = ext4_inode_bitmap(sb, desc); |
Kemeng Shi | b83acc7 | 2023-02-22 04:30:24 +0800 | [diff] [blame] | 101 | if (!ext4_inode_bitmap_csum_verify(sb, desc, bh, |
Theodore Ts'o | 46f870d6 | 2019-11-21 13:09:43 -0500 | [diff] [blame] | 102 | EXT4_INODES_PER_GROUP(sb) / 8) || |
| 103 | ext4_simulate_fail(sb, EXT4_SIM_IBITMAP_CRC)) { |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 104 | ext4_unlock_group(sb, block_group); |
| 105 | ext4_error(sb, "Corrupt inode bitmap - block_group = %u, " |
| 106 | "inode_bitmap = %llu", block_group, blk); |
Wang Shilong | db79e6d | 2018-05-12 11:39:40 -0400 | [diff] [blame] | 107 | ext4_mark_group_bitmap_corrupted(sb, block_group, |
| 108 | EXT4_GROUP_INFO_IBITMAP_CORRUPT); |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 109 | return -EFSBADCRC; |
| 110 | } |
| 111 | set_buffer_verified(bh); |
Theodore Ts'o | 8d5a803 | 2018-07-12 19:08:05 -0400 | [diff] [blame] | 112 | verified: |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 113 | ext4_unlock_group(sb, block_group); |
| 114 | return 0; |
| 115 | } |
| 116 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 117 | /* |
| 118 | * Read the inode allocation bitmap for a given block_group, reading |
| 119 | * into the specified slot in the superblock's bitmap cache. |
| 120 | * |
Josh Triplett | 9033783 | 2020-03-29 13:21:41 -0700 | [diff] [blame] | 121 | * Return buffer_head of bitmap on success, or an ERR_PTR on error. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 122 | */ |
| 123 | static struct buffer_head * |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 124 | ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 125 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 126 | struct ext4_group_desc *desc; |
Theodore Ts'o | 7dac4a1 | 2018-03-26 23:54:10 -0400 | [diff] [blame] | 127 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 128 | struct buffer_head *bh = NULL; |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 129 | ext4_fsblk_t bitmap_blk; |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 130 | int err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 131 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 132 | desc = ext4_get_group_desc(sb, block_group, NULL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 133 | if (!desc) |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 134 | return ERR_PTR(-EFSCORRUPTED); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 135 | |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 136 | bitmap_blk = ext4_inode_bitmap(sb, desc); |
Theodore Ts'o | 7dac4a1 | 2018-03-26 23:54:10 -0400 | [diff] [blame] | 137 | if ((bitmap_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) || |
| 138 | (bitmap_blk >= ext4_blocks_count(sbi->s_es))) { |
| 139 | ext4_error(sb, "Invalid inode bitmap blk %llu in " |
| 140 | "block_group %u", bitmap_blk, block_group); |
Wang Shilong | 206f6d5 | 2018-05-12 12:15:21 -0400 | [diff] [blame] | 141 | ext4_mark_group_bitmap_corrupted(sb, block_group, |
| 142 | EXT4_GROUP_INFO_IBITMAP_CORRUPT); |
Theodore Ts'o | 7dac4a1 | 2018-03-26 23:54:10 -0400 | [diff] [blame] | 143 | return ERR_PTR(-EFSCORRUPTED); |
| 144 | } |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 145 | bh = sb_getblk(sb, bitmap_blk); |
| 146 | if (unlikely(!bh)) { |
Wang Shilong | 5ef2a69 | 2018-08-01 12:02:31 -0400 | [diff] [blame] | 147 | ext4_warning(sb, "Cannot read inode bitmap - " |
| 148 | "block_group = %u, inode_bitmap = %llu", |
| 149 | block_group, bitmap_blk); |
Wang Shilong | 0db9fde | 2018-05-12 11:35:01 -0400 | [diff] [blame] | 150 | return ERR_PTR(-ENOMEM); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 151 | } |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 152 | if (bitmap_uptodate(bh)) |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 153 | goto verify; |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 154 | |
Frederic Bohe | c806e68 | 2008-10-10 08:09:18 -0400 | [diff] [blame] | 155 | lock_buffer(bh); |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 156 | if (bitmap_uptodate(bh)) { |
| 157 | unlock_buffer(bh); |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 158 | goto verify; |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 159 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 160 | |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 161 | ext4_lock_group(sb, block_group); |
Theodore Ts'o | 8844618 | 2018-06-14 00:58:00 -0400 | [diff] [blame] | 162 | if (ext4_has_group_desc_csum(sb) && |
| 163 | (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT))) { |
| 164 | if (block_group == 0) { |
| 165 | ext4_unlock_group(sb, block_group); |
| 166 | unlock_buffer(bh); |
| 167 | ext4_error(sb, "Inode bitmap for bg 0 marked " |
| 168 | "uninitialized"); |
| 169 | err = -EFSCORRUPTED; |
| 170 | goto out; |
| 171 | } |
Theodore Ts'o | 044e6e3 | 2018-02-19 14:16:47 -0500 | [diff] [blame] | 172 | memset(bh->b_data, 0, (EXT4_INODES_PER_GROUP(sb) + 7) / 8); |
| 173 | ext4_mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), |
| 174 | sb->s_blocksize * 8, bh->b_data); |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 175 | set_bitmap_uptodate(bh); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 176 | set_buffer_uptodate(bh); |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 177 | set_buffer_verified(bh); |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 178 | ext4_unlock_group(sb, block_group); |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 179 | unlock_buffer(bh); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 180 | return bh; |
| 181 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 182 | ext4_unlock_group(sb, block_group); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 183 | |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 184 | if (buffer_uptodate(bh)) { |
| 185 | /* |
| 186 | * if not uninit if bh is uptodate, |
| 187 | * bitmap is also uptodate |
| 188 | */ |
| 189 | set_bitmap_uptodate(bh); |
| 190 | unlock_buffer(bh); |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 191 | goto verify; |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 192 | } |
| 193 | /* |
Theodore Ts'o | 813e572 | 2012-02-20 17:52:46 -0500 | [diff] [blame] | 194 | * submit the buffer_head for reading |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 195 | */ |
Jiaying Zhang | 0562e0b | 2011-03-21 21:38:05 -0400 | [diff] [blame] | 196 | trace_ext4_load_inode_bitmap(sb, block_group); |
zhangyi (F) | 2d069c0 | 2020-09-24 15:33:33 +0800 | [diff] [blame] | 197 | ext4_read_bh(bh, REQ_META | REQ_PRIO, ext4_end_bitmap_read); |
Theodore Ts'o | 46f870d6 | 2019-11-21 13:09:43 -0500 | [diff] [blame] | 198 | ext4_simulate_fail_bh(sb, bh, EXT4_SIM_IBITMAP_EIO); |
Theodore Ts'o | 813e572 | 2012-02-20 17:52:46 -0500 | [diff] [blame] | 199 | if (!buffer_uptodate(bh)) { |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 200 | put_bh(bh); |
Theodore Ts'o | 54d3adb | 2020-03-28 19:33:43 -0400 | [diff] [blame] | 201 | ext4_error_err(sb, EIO, "Cannot read inode bitmap - " |
| 202 | "block_group = %u, inode_bitmap = %llu", |
| 203 | block_group, bitmap_blk); |
Wang Shilong | 206f6d5 | 2018-05-12 12:15:21 -0400 | [diff] [blame] | 204 | ext4_mark_group_bitmap_corrupted(sb, block_group, |
| 205 | EXT4_GROUP_INFO_IBITMAP_CORRUPT); |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 206 | return ERR_PTR(-EIO); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 207 | } |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 208 | |
| 209 | verify: |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 210 | err = ext4_validate_inode_bitmap(sb, desc, block_group, bh); |
| 211 | if (err) |
| 212 | goto out; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 213 | return bh; |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 214 | out: |
| 215 | put_bh(bh); |
| 216 | return ERR_PTR(err); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | /* |
| 220 | * NOTE! When we get the inode, we're the only people |
| 221 | * that have access to it, and as such there are no |
| 222 | * race conditions we have to worry about. The inode |
| 223 | * is not on the hash-lists, and it cannot be reached |
| 224 | * through the filesystem because the directory entry |
| 225 | * has been deleted earlier. |
| 226 | * |
| 227 | * HOWEVER: we must make sure that we get no aliases, |
| 228 | * which means that we have to call "clear_inode()" |
| 229 | * _before_ we mark the inode not in use in the inode |
| 230 | * bitmaps. Otherwise a newly created file might use |
| 231 | * the same inode number (not actually the same pointer |
| 232 | * though), and then we'd have two inodes sharing the |
| 233 | * same inode number and space on the harddisk. |
| 234 | */ |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 235 | void ext4_free_inode(handle_t *handle, struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 236 | { |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 237 | struct super_block *sb = inode->i_sb; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 238 | int is_directory; |
| 239 | unsigned long ino; |
| 240 | struct buffer_head *bitmap_bh = NULL; |
| 241 | struct buffer_head *bh2; |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 242 | ext4_group_t block_group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 243 | unsigned long bit; |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 244 | struct ext4_group_desc *gdp; |
| 245 | struct ext4_super_block *es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 246 | struct ext4_sb_info *sbi; |
Eric Sandeen | 7ce9d5d | 2009-03-04 18:38:18 -0500 | [diff] [blame] | 247 | int fatal = 0, err, count, cleared; |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 248 | struct ext4_group_info *grp; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 249 | |
Theodore Ts'o | 92b97816 | 2012-03-19 23:41:49 -0400 | [diff] [blame] | 250 | if (!sb) { |
| 251 | printk(KERN_ERR "EXT4-fs: %s:%d: inode on " |
| 252 | "nonexistent device\n", __func__, __LINE__); |
| 253 | return; |
| 254 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 255 | if (atomic_read(&inode->i_count) > 1) { |
Theodore Ts'o | 92b97816 | 2012-03-19 23:41:49 -0400 | [diff] [blame] | 256 | ext4_msg(sb, KERN_ERR, "%s:%d: inode #%lu: count=%d", |
| 257 | __func__, __LINE__, inode->i_ino, |
| 258 | atomic_read(&inode->i_count)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 259 | return; |
| 260 | } |
| 261 | if (inode->i_nlink) { |
Theodore Ts'o | 92b97816 | 2012-03-19 23:41:49 -0400 | [diff] [blame] | 262 | ext4_msg(sb, KERN_ERR, "%s:%d: inode #%lu: nlink=%d\n", |
| 263 | __func__, __LINE__, inode->i_ino, inode->i_nlink); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 264 | return; |
| 265 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 266 | sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 267 | |
| 268 | ino = inode->i_ino; |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 269 | ext4_debug("freeing inode %lu\n", ino); |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 270 | trace_ext4_free_inode(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 271 | |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 272 | dquot_initialize(inode); |
Christoph Hellwig | 63936dd | 2010-03-03 09:05:01 -0500 | [diff] [blame] | 273 | dquot_free_inode(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 274 | |
| 275 | is_directory = S_ISDIR(inode->i_mode); |
| 276 | |
| 277 | /* Do this BEFORE marking the inode not in use or returning an error */ |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 278 | ext4_clear_inode(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 279 | |
Jun Piao | 49598e0 | 2018-01-11 13:17:49 -0500 | [diff] [blame] | 280 | es = sbi->s_es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 281 | if (ino < EXT4_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) { |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 282 | ext4_error(sb, "reserved or nonexistent inode %lu", ino); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 283 | goto error_return; |
| 284 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 285 | block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); |
| 286 | bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 287 | bitmap_bh = ext4_read_inode_bitmap(sb, block_group); |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 288 | /* Don't bother if the inode bitmap is corrupt. */ |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 289 | if (IS_ERR(bitmap_bh)) { |
| 290 | fatal = PTR_ERR(bitmap_bh); |
| 291 | bitmap_bh = NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 292 | goto error_return; |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 293 | } |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 294 | if (!(sbi->s_mount_state & EXT4_FC_REPLAY)) { |
| 295 | grp = ext4_get_group_info(sb, block_group); |
Theodore Ts'o | 5354b2a | 2023-04-29 00:06:28 -0400 | [diff] [blame] | 296 | if (!grp || unlikely(EXT4_MB_GRP_IBITMAP_CORRUPT(grp))) { |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 297 | fatal = -EFSCORRUPTED; |
| 298 | goto error_return; |
| 299 | } |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 300 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 301 | |
| 302 | BUFFER_TRACE(bitmap_bh, "get_write_access"); |
Jan Kara | 188c299 | 2021-08-16 11:57:04 +0200 | [diff] [blame] | 303 | fatal = ext4_journal_get_write_access(handle, sb, bitmap_bh, |
| 304 | EXT4_JTR_NONE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 305 | if (fatal) |
| 306 | goto error_return; |
| 307 | |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 308 | fatal = -ESRCH; |
| 309 | gdp = ext4_get_group_desc(sb, block_group, &bh2); |
| 310 | if (gdp) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 311 | BUFFER_TRACE(bh2, "get_write_access"); |
Jan Kara | 188c299 | 2021-08-16 11:57:04 +0200 | [diff] [blame] | 312 | fatal = ext4_journal_get_write_access(handle, sb, bh2, |
| 313 | EXT4_JTR_NONE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 314 | } |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 315 | ext4_lock_group(sb, block_group); |
Akinobu Mita | 597d508 | 2011-12-28 20:32:07 -0500 | [diff] [blame] | 316 | cleared = ext4_test_and_clear_bit(bit, bitmap_bh->b_data); |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 317 | if (fatal || !cleared) { |
| 318 | ext4_unlock_group(sb, block_group); |
| 319 | goto out; |
| 320 | } |
| 321 | |
| 322 | count = ext4_free_inodes_count(sb, gdp) + 1; |
| 323 | ext4_free_inodes_set(sb, gdp, count); |
| 324 | if (is_directory) { |
| 325 | count = ext4_used_dirs_count(sb, gdp) - 1; |
| 326 | ext4_used_dirs_set(sb, gdp, count); |
Ritesh Harjani | b45f189 | 2021-04-29 16:13:44 +0530 | [diff] [blame] | 327 | if (percpu_counter_initialized(&sbi->s_dirs_counter)) |
| 328 | percpu_counter_dec(&sbi->s_dirs_counter); |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 329 | } |
Kemeng Shi | 4fd873c | 2023-02-22 04:30:25 +0800 | [diff] [blame] | 330 | ext4_inode_bitmap_csum_set(sb, gdp, bitmap_bh, |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 331 | EXT4_INODES_PER_GROUP(sb) / 8); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 332 | ext4_group_desc_csum_set(sb, block_group, gdp); |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 333 | ext4_unlock_group(sb, block_group); |
| 334 | |
Ritesh Harjani | b45f189 | 2021-04-29 16:13:44 +0530 | [diff] [blame] | 335 | if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) |
| 336 | percpu_counter_inc(&sbi->s_freeinodes_counter); |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 337 | if (sbi->s_log_groups_per_flex) { |
Suraj Jitindar Singh | 7c99072 | 2020-02-18 19:08:51 -0800 | [diff] [blame] | 338 | struct flex_groups *fg; |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 339 | |
Suraj Jitindar Singh | 7c99072 | 2020-02-18 19:08:51 -0800 | [diff] [blame] | 340 | fg = sbi_array_rcu_deref(sbi, s_flex_groups, |
| 341 | ext4_flex_group(sbi, block_group)); |
| 342 | atomic_inc(&fg->free_inodes); |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 343 | if (is_directory) |
Suraj Jitindar Singh | 7c99072 | 2020-02-18 19:08:51 -0800 | [diff] [blame] | 344 | atomic_dec(&fg->used_dirs); |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 345 | } |
| 346 | BUFFER_TRACE(bh2, "call ext4_handle_dirty_metadata"); |
| 347 | fatal = ext4_handle_dirty_metadata(handle, NULL, bh2); |
| 348 | out: |
| 349 | if (cleared) { |
| 350 | BUFFER_TRACE(bitmap_bh, "call ext4_handle_dirty_metadata"); |
| 351 | err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh); |
| 352 | if (!fatal) |
| 353 | fatal = err; |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 354 | } else { |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 355 | ext4_error(sb, "bit already cleared for inode %lu", ino); |
Wang Shilong | db79e6d | 2018-05-12 11:39:40 -0400 | [diff] [blame] | 356 | ext4_mark_group_bitmap_corrupted(sb, block_group, |
| 357 | EXT4_GROUP_INFO_IBITMAP_CORRUPT); |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 358 | } |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 359 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 360 | error_return: |
| 361 | brelse(bitmap_bh); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 362 | ext4_std_error(sb, fatal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 363 | } |
| 364 | |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 365 | struct orlov_stats { |
Theodore Ts'o | 90ba983 | 2013-03-11 23:39:59 -0400 | [diff] [blame] | 366 | __u64 free_clusters; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 367 | __u32 free_inodes; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 368 | __u32 used_dirs; |
| 369 | }; |
| 370 | |
| 371 | /* |
| 372 | * Helper function for Orlov's allocator; returns critical information |
| 373 | * for a particular block group or flex_bg. If flex_size is 1, then g |
| 374 | * is a block group number; otherwise it is flex_bg number. |
| 375 | */ |
Theodore Ts'o | 1f109d5 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 376 | static void get_orlov_stats(struct super_block *sb, ext4_group_t g, |
| 377 | int flex_size, struct orlov_stats *stats) |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 378 | { |
| 379 | struct ext4_group_desc *desc; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 380 | |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 381 | if (flex_size > 1) { |
Suraj Jitindar Singh | 7c99072 | 2020-02-18 19:08:51 -0800 | [diff] [blame] | 382 | struct flex_groups *fg = sbi_array_rcu_deref(EXT4_SB(sb), |
| 383 | s_flex_groups, g); |
| 384 | stats->free_inodes = atomic_read(&fg->free_inodes); |
| 385 | stats->free_clusters = atomic64_read(&fg->free_clusters); |
| 386 | stats->used_dirs = atomic_read(&fg->used_dirs); |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 387 | return; |
| 388 | } |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 389 | |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 390 | desc = ext4_get_group_desc(sb, g, NULL); |
| 391 | if (desc) { |
| 392 | stats->free_inodes = ext4_free_inodes_count(sb, desc); |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 393 | stats->free_clusters = ext4_free_group_clusters(sb, desc); |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 394 | stats->used_dirs = ext4_used_dirs_count(sb, desc); |
| 395 | } else { |
| 396 | stats->free_inodes = 0; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 397 | stats->free_clusters = 0; |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 398 | stats->used_dirs = 0; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 399 | } |
| 400 | } |
| 401 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 402 | /* |
| 403 | * Orlov's allocator for directories. |
| 404 | * |
| 405 | * We always try to spread first-level directories. |
| 406 | * |
Pan Dong | c89849c | 2021-05-25 15:36:56 +0800 | [diff] [blame] | 407 | * If there are blockgroups with both free inodes and free clusters counts |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 408 | * not worse than average we return one with smallest directory count. |
| 409 | * Otherwise we simply return a random group. |
| 410 | * |
| 411 | * For the rest rules look so: |
| 412 | * |
| 413 | * It's OK to put directory into a group unless |
| 414 | * it has too many directories already (max_dirs) or |
| 415 | * it has too few free inodes left (min_inodes) or |
Pan Dong | c89849c | 2021-05-25 15:36:56 +0800 | [diff] [blame] | 416 | * it has too few free clusters left (min_clusters) or |
Benoit Boissinot | 1cc8dcf | 2008-04-21 22:45:55 +0000 | [diff] [blame] | 417 | * Parent's group is preferred, if it doesn't satisfy these |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 418 | * conditions we search cyclically through the rest. If none |
| 419 | * of the groups look good we just look for a group with more |
| 420 | * free inodes than average (starting at parent's group). |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 421 | */ |
| 422 | |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 423 | static int find_group_orlov(struct super_block *sb, struct inode *parent, |
Al Viro | dcca3fe | 2011-07-26 02:48:06 -0400 | [diff] [blame] | 424 | ext4_group_t *group, umode_t mode, |
Theodore Ts'o | f157a4a | 2009-06-13 11:09:42 -0400 | [diff] [blame] | 425 | const struct qstr *qstr) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 426 | { |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 427 | ext4_group_t parent_group = EXT4_I(parent)->i_block_group; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 428 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 429 | ext4_group_t real_ngroups = ext4_get_groups_count(sb); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 430 | int inodes_per_group = EXT4_INODES_PER_GROUP(sb); |
Theodore Ts'o | 14c83c9 | 2011-12-28 20:25:13 -0500 | [diff] [blame] | 431 | unsigned int freei, avefreei, grp_free; |
Pan Dong | c89849c | 2021-05-25 15:36:56 +0800 | [diff] [blame] | 432 | ext4_fsblk_t freec, avefreec; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 433 | unsigned int ndirs; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 434 | int max_dirs, min_inodes; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 435 | ext4_grpblk_t min_clusters; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 436 | ext4_group_t i, grp, g, ngroups; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 437 | struct ext4_group_desc *desc; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 438 | struct orlov_stats stats; |
| 439 | int flex_size = ext4_flex_bg_size(sbi); |
Theodore Ts'o | f157a4a | 2009-06-13 11:09:42 -0400 | [diff] [blame] | 440 | struct dx_hash_info hinfo; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 441 | |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 442 | ngroups = real_ngroups; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 443 | if (flex_size > 1) { |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 444 | ngroups = (real_ngroups + flex_size - 1) >> |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 445 | sbi->s_log_groups_per_flex; |
| 446 | parent_group >>= sbi->s_log_groups_per_flex; |
| 447 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 448 | |
| 449 | freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter); |
| 450 | avefreei = freei / ngroups; |
Pan Dong | c89849c | 2021-05-25 15:36:56 +0800 | [diff] [blame] | 451 | freec = percpu_counter_read_positive(&sbi->s_freeclusters_counter); |
| 452 | avefreec = freec; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 453 | do_div(avefreec, ngroups); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 454 | ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter); |
| 455 | |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 456 | if (S_ISDIR(mode) && |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 457 | ((parent == d_inode(sb->s_root)) || |
Dmitry Monakhov | 12e9b89 | 2010-05-16 22:00:00 -0400 | [diff] [blame] | 458 | (ext4_test_inode_flag(parent, EXT4_INODE_TOPDIR)))) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 459 | int best_ndir = inodes_per_group; |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 460 | int ret = -1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 461 | |
Theodore Ts'o | f157a4a | 2009-06-13 11:09:42 -0400 | [diff] [blame] | 462 | if (qstr) { |
| 463 | hinfo.hash_version = DX_HASH_HALF_MD4; |
| 464 | hinfo.seed = sbi->s_hash_seed; |
Gabriel Krisman Bertazi | b886ee3 | 2019-04-25 14:12:08 -0400 | [diff] [blame] | 465 | ext4fs_dirhash(parent, qstr->name, qstr->len, &hinfo); |
Jason A. Donenfeld | 8b3ccbc | 2022-10-05 16:43:38 +0200 | [diff] [blame] | 466 | parent_group = hinfo.hash % ngroups; |
Theodore Ts'o | f157a4a | 2009-06-13 11:09:42 -0400 | [diff] [blame] | 467 | } else |
Jason A. Donenfeld | 8032bf1 | 2022-10-09 20:44:02 -0600 | [diff] [blame] | 468 | parent_group = get_random_u32_below(ngroups); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 469 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 470 | g = (parent_group + i) % ngroups; |
| 471 | get_orlov_stats(sb, g, flex_size, &stats); |
| 472 | if (!stats.free_inodes) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 473 | continue; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 474 | if (stats.used_dirs >= best_ndir) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 475 | continue; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 476 | if (stats.free_inodes < avefreei) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 477 | continue; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 478 | if (stats.free_clusters < avefreec) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 479 | continue; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 480 | grp = g; |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 481 | ret = 0; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 482 | best_ndir = stats.used_dirs; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 483 | } |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 484 | if (ret) |
| 485 | goto fallback; |
| 486 | found_flex_bg: |
| 487 | if (flex_size == 1) { |
| 488 | *group = grp; |
| 489 | return 0; |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * We pack inodes at the beginning of the flexgroup's |
| 494 | * inode tables. Block allocation decisions will do |
| 495 | * something similar, although regular files will |
| 496 | * start at 2nd block group of the flexgroup. See |
| 497 | * ext4_ext_find_goal() and ext4_find_near(). |
| 498 | */ |
| 499 | grp *= flex_size; |
| 500 | for (i = 0; i < flex_size; i++) { |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 501 | if (grp+i >= real_ngroups) |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 502 | break; |
| 503 | desc = ext4_get_group_desc(sb, grp+i, NULL); |
| 504 | if (desc && ext4_free_inodes_count(sb, desc)) { |
| 505 | *group = grp+i; |
| 506 | return 0; |
| 507 | } |
| 508 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 509 | goto fallback; |
| 510 | } |
| 511 | |
Jan Kara | 613c5a8 | 2022-09-08 11:21:26 +0200 | [diff] [blame] | 512 | max_dirs = ndirs / ngroups + inodes_per_group*flex_size / 16; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 513 | min_inodes = avefreei - inodes_per_group*flex_size / 4; |
| 514 | if (min_inodes < 1) |
| 515 | min_inodes = 1; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 516 | min_clusters = avefreec - EXT4_CLUSTERS_PER_GROUP(sb)*flex_size / 4; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 517 | |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 518 | /* |
| 519 | * Start looking in the flex group where we last allocated an |
| 520 | * inode for this parent directory |
| 521 | */ |
| 522 | if (EXT4_I(parent)->i_last_alloc_group != ~0) { |
| 523 | parent_group = EXT4_I(parent)->i_last_alloc_group; |
| 524 | if (flex_size > 1) |
| 525 | parent_group >>= sbi->s_log_groups_per_flex; |
| 526 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 527 | |
| 528 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 529 | grp = (parent_group + i) % ngroups; |
| 530 | get_orlov_stats(sb, grp, flex_size, &stats); |
| 531 | if (stats.used_dirs >= max_dirs) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 532 | continue; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 533 | if (stats.free_inodes < min_inodes) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 534 | continue; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 535 | if (stats.free_clusters < min_clusters) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 536 | continue; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 537 | goto found_flex_bg; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 538 | } |
| 539 | |
| 540 | fallback: |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 541 | ngroups = real_ngroups; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 542 | avefreei = freei / ngroups; |
Theodore Ts'o | b5451f7 | 2009-04-22 21:00:36 -0400 | [diff] [blame] | 543 | fallback_retry: |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 544 | parent_group = EXT4_I(parent)->i_block_group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 545 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 546 | grp = (parent_group + i) % ngroups; |
| 547 | desc = ext4_get_group_desc(sb, grp, NULL); |
Dan Carpenter | bb3d132 | 2012-05-28 14:16:57 -0400 | [diff] [blame] | 548 | if (desc) { |
| 549 | grp_free = ext4_free_inodes_count(sb, desc); |
| 550 | if (grp_free && grp_free >= avefreei) { |
| 551 | *group = grp; |
| 552 | return 0; |
| 553 | } |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 554 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 555 | } |
| 556 | |
| 557 | if (avefreei) { |
| 558 | /* |
| 559 | * The free-inodes counter is approximate, and for really small |
| 560 | * filesystems the above test can fail to find any blockgroups |
| 561 | */ |
| 562 | avefreei = 0; |
Theodore Ts'o | b5451f7 | 2009-04-22 21:00:36 -0400 | [diff] [blame] | 563 | goto fallback_retry; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 564 | } |
| 565 | |
| 566 | return -1; |
| 567 | } |
| 568 | |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 569 | static int find_group_other(struct super_block *sb, struct inode *parent, |
Al Viro | dcca3fe | 2011-07-26 02:48:06 -0400 | [diff] [blame] | 570 | ext4_group_t *group, umode_t mode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 571 | { |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 572 | ext4_group_t parent_group = EXT4_I(parent)->i_block_group; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 573 | ext4_group_t i, last, ngroups = ext4_get_groups_count(sb); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 574 | struct ext4_group_desc *desc; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 575 | int flex_size = ext4_flex_bg_size(EXT4_SB(sb)); |
| 576 | |
| 577 | /* |
| 578 | * Try to place the inode is the same flex group as its |
| 579 | * parent. If we can't find space, use the Orlov algorithm to |
| 580 | * find another flex group, and store that information in the |
| 581 | * parent directory's inode information so that use that flex |
| 582 | * group for future allocations. |
| 583 | */ |
| 584 | if (flex_size > 1) { |
| 585 | int retry = 0; |
| 586 | |
| 587 | try_again: |
| 588 | parent_group &= ~(flex_size-1); |
| 589 | last = parent_group + flex_size; |
| 590 | if (last > ngroups) |
| 591 | last = ngroups; |
| 592 | for (i = parent_group; i < last; i++) { |
| 593 | desc = ext4_get_group_desc(sb, i, NULL); |
| 594 | if (desc && ext4_free_inodes_count(sb, desc)) { |
| 595 | *group = i; |
| 596 | return 0; |
| 597 | } |
| 598 | } |
| 599 | if (!retry && EXT4_I(parent)->i_last_alloc_group != ~0) { |
| 600 | retry = 1; |
| 601 | parent_group = EXT4_I(parent)->i_last_alloc_group; |
| 602 | goto try_again; |
| 603 | } |
| 604 | /* |
| 605 | * If this didn't work, use the Orlov search algorithm |
| 606 | * to find a new flex group; we pass in the mode to |
| 607 | * avoid the topdir algorithms. |
| 608 | */ |
| 609 | *group = parent_group + flex_size; |
| 610 | if (*group > ngroups) |
| 611 | *group = 0; |
Peter Huewe | 7dc5761 | 2011-02-21 21:01:42 -0500 | [diff] [blame] | 612 | return find_group_orlov(sb, parent, group, mode, NULL); |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 613 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 614 | |
| 615 | /* |
| 616 | * Try to place the inode in its parent directory |
| 617 | */ |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 618 | *group = parent_group; |
| 619 | desc = ext4_get_group_desc(sb, *group, NULL); |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 620 | if (desc && ext4_free_inodes_count(sb, desc) && |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 621 | ext4_free_group_clusters(sb, desc)) |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 622 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 623 | |
| 624 | /* |
| 625 | * We're going to place this inode in a different blockgroup from its |
| 626 | * parent. We want to cause files in a common directory to all land in |
| 627 | * the same blockgroup. But we want files which are in a different |
| 628 | * directory which shares a blockgroup with our parent to land in a |
| 629 | * different blockgroup. |
| 630 | * |
| 631 | * So add our directory's i_ino into the starting point for the hash. |
| 632 | */ |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 633 | *group = (*group + parent->i_ino) % ngroups; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 634 | |
| 635 | /* |
| 636 | * Use a quadratic hash to find a group with a free inode and some free |
| 637 | * blocks. |
| 638 | */ |
| 639 | for (i = 1; i < ngroups; i <<= 1) { |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 640 | *group += i; |
| 641 | if (*group >= ngroups) |
| 642 | *group -= ngroups; |
| 643 | desc = ext4_get_group_desc(sb, *group, NULL); |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 644 | if (desc && ext4_free_inodes_count(sb, desc) && |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 645 | ext4_free_group_clusters(sb, desc)) |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 646 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | /* |
| 650 | * That failed: try linear search for a free inode, even if that group |
| 651 | * has no free blocks. |
| 652 | */ |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 653 | *group = parent_group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 654 | for (i = 0; i < ngroups; i++) { |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 655 | if (++*group >= ngroups) |
| 656 | *group = 0; |
| 657 | desc = ext4_get_group_desc(sb, *group, NULL); |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 658 | if (desc && ext4_free_inodes_count(sb, desc)) |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 659 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | return -1; |
| 663 | } |
| 664 | |
| 665 | /* |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 666 | * In no journal mode, if an inode has recently been deleted, we want |
| 667 | * to avoid reusing it until we're reasonably sure the inode table |
| 668 | * block has been written back to disk. (Yes, these values are |
| 669 | * somewhat arbitrary...) |
| 670 | */ |
Theodore Ts'o | a17a9d9 | 2020-04-13 22:30:52 -0400 | [diff] [blame] | 671 | #define RECENTCY_MIN 60 |
Andreas Dilger | b5f5157 | 2017-08-31 11:09:45 -0400 | [diff] [blame] | 672 | #define RECENTCY_DIRTY 300 |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 673 | |
| 674 | static int recently_deleted(struct super_block *sb, ext4_group_t group, int ino) |
| 675 | { |
| 676 | struct ext4_group_desc *gdp; |
| 677 | struct ext4_inode *raw_inode; |
| 678 | struct buffer_head *bh; |
Andreas Dilger | b5f5157 | 2017-08-31 11:09:45 -0400 | [diff] [blame] | 679 | int inodes_per_block = EXT4_SB(sb)->s_inodes_per_block; |
| 680 | int offset, ret = 0; |
| 681 | int recentcy = RECENTCY_MIN; |
| 682 | u32 dtime, now; |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 683 | |
| 684 | gdp = ext4_get_group_desc(sb, group, NULL); |
| 685 | if (unlikely(!gdp)) |
| 686 | return 0; |
| 687 | |
Jan Kara | 4f9d956 | 2017-08-24 11:52:21 -0400 | [diff] [blame] | 688 | bh = sb_find_get_block(sb, ext4_inode_table(sb, gdp) + |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 689 | (ino / inodes_per_block)); |
Jan Kara | 4f9d956 | 2017-08-24 11:52:21 -0400 | [diff] [blame] | 690 | if (!bh || !buffer_uptodate(bh)) |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 691 | /* |
| 692 | * If the block is not in the buffer cache, then it |
| 693 | * must have been written out. |
| 694 | */ |
| 695 | goto out; |
| 696 | |
| 697 | offset = (ino % inodes_per_block) * EXT4_INODE_SIZE(sb); |
| 698 | raw_inode = (struct ext4_inode *) (bh->b_data + offset); |
Andreas Dilger | b5f5157 | 2017-08-31 11:09:45 -0400 | [diff] [blame] | 699 | |
| 700 | /* i_dtime is only 32 bits on disk, but we only care about relative |
| 701 | * times in the range of a few minutes (i.e. long enough to sync a |
| 702 | * recently-deleted inode to disk), so using the low 32 bits of the |
| 703 | * clock (a 68 year range) is enough, see time_before32() */ |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 704 | dtime = le32_to_cpu(raw_inode->i_dtime); |
Andreas Dilger | b5f5157 | 2017-08-31 11:09:45 -0400 | [diff] [blame] | 705 | now = ktime_get_real_seconds(); |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 706 | if (buffer_dirty(bh)) |
| 707 | recentcy += RECENTCY_DIRTY; |
| 708 | |
Andreas Dilger | b5f5157 | 2017-08-31 11:09:45 -0400 | [diff] [blame] | 709 | if (dtime && time_before32(dtime, now) && |
| 710 | time_before32(now, dtime + recentcy)) |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 711 | ret = 1; |
| 712 | out: |
| 713 | brelse(bh); |
| 714 | return ret; |
| 715 | } |
| 716 | |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 717 | static int find_inode_bit(struct super_block *sb, ext4_group_t group, |
| 718 | struct buffer_head *bitmap, unsigned long *ino) |
| 719 | { |
Jan Kara | d05466b | 2020-03-18 13:13:17 +0100 | [diff] [blame] | 720 | bool check_recently_deleted = EXT4_SB(sb)->s_journal == NULL; |
| 721 | unsigned long recently_deleted_ino = EXT4_INODES_PER_GROUP(sb); |
| 722 | |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 723 | next: |
| 724 | *ino = ext4_find_next_zero_bit((unsigned long *) |
| 725 | bitmap->b_data, |
| 726 | EXT4_INODES_PER_GROUP(sb), *ino); |
| 727 | if (*ino >= EXT4_INODES_PER_GROUP(sb)) |
Jan Kara | d05466b | 2020-03-18 13:13:17 +0100 | [diff] [blame] | 728 | goto not_found; |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 729 | |
Jan Kara | d05466b | 2020-03-18 13:13:17 +0100 | [diff] [blame] | 730 | if (check_recently_deleted && recently_deleted(sb, group, *ino)) { |
| 731 | recently_deleted_ino = *ino; |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 732 | *ino = *ino + 1; |
| 733 | if (*ino < EXT4_INODES_PER_GROUP(sb)) |
| 734 | goto next; |
Jan Kara | d05466b | 2020-03-18 13:13:17 +0100 | [diff] [blame] | 735 | goto not_found; |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 736 | } |
Jan Kara | d05466b | 2020-03-18 13:13:17 +0100 | [diff] [blame] | 737 | return 1; |
| 738 | not_found: |
| 739 | if (recently_deleted_ino >= EXT4_INODES_PER_GROUP(sb)) |
| 740 | return 0; |
| 741 | /* |
| 742 | * Not reusing recently deleted inodes is mostly a preference. We don't |
| 743 | * want to report ENOSPC or skew allocation patterns because of that. |
| 744 | * So return even recently deleted inode if we could find better in the |
| 745 | * given range. |
| 746 | */ |
| 747 | *ino = recently_deleted_ino; |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 748 | return 1; |
| 749 | } |
| 750 | |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 751 | int ext4_mark_inode_used(struct super_block *sb, int ino) |
| 752 | { |
| 753 | unsigned long max_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count); |
| 754 | struct buffer_head *inode_bitmap_bh = NULL, *group_desc_bh = NULL; |
| 755 | struct ext4_group_desc *gdp; |
| 756 | ext4_group_t group; |
| 757 | int bit; |
| 758 | int err = -EFSCORRUPTED; |
| 759 | |
| 760 | if (ino < EXT4_FIRST_INO(sb) || ino > max_ino) |
| 761 | goto out; |
| 762 | |
| 763 | group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); |
| 764 | bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); |
| 765 | inode_bitmap_bh = ext4_read_inode_bitmap(sb, group); |
| 766 | if (IS_ERR(inode_bitmap_bh)) |
| 767 | return PTR_ERR(inode_bitmap_bh); |
| 768 | |
| 769 | if (ext4_test_bit(bit, inode_bitmap_bh->b_data)) { |
| 770 | err = 0; |
| 771 | goto out; |
| 772 | } |
| 773 | |
| 774 | gdp = ext4_get_group_desc(sb, group, &group_desc_bh); |
| 775 | if (!gdp || !group_desc_bh) { |
| 776 | err = -EINVAL; |
| 777 | goto out; |
| 778 | } |
| 779 | |
| 780 | ext4_set_bit(bit, inode_bitmap_bh->b_data); |
| 781 | |
| 782 | BUFFER_TRACE(inode_bitmap_bh, "call ext4_handle_dirty_metadata"); |
| 783 | err = ext4_handle_dirty_metadata(NULL, NULL, inode_bitmap_bh); |
| 784 | if (err) { |
| 785 | ext4_std_error(sb, err); |
| 786 | goto out; |
| 787 | } |
| 788 | err = sync_dirty_buffer(inode_bitmap_bh); |
| 789 | if (err) { |
| 790 | ext4_std_error(sb, err); |
| 791 | goto out; |
| 792 | } |
| 793 | |
| 794 | /* We may have to initialize the block bitmap if it isn't already */ |
| 795 | if (ext4_has_group_desc_csum(sb) && |
| 796 | gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { |
| 797 | struct buffer_head *block_bitmap_bh; |
| 798 | |
| 799 | block_bitmap_bh = ext4_read_block_bitmap(sb, group); |
| 800 | if (IS_ERR(block_bitmap_bh)) { |
| 801 | err = PTR_ERR(block_bitmap_bh); |
| 802 | goto out; |
| 803 | } |
| 804 | |
| 805 | BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap"); |
| 806 | err = ext4_handle_dirty_metadata(NULL, NULL, block_bitmap_bh); |
| 807 | sync_dirty_buffer(block_bitmap_bh); |
| 808 | |
| 809 | /* recheck and clear flag under lock if we still need to */ |
| 810 | ext4_lock_group(sb, group); |
| 811 | if (ext4_has_group_desc_csum(sb) && |
| 812 | (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))) { |
| 813 | gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT); |
| 814 | ext4_free_group_clusters_set(sb, gdp, |
| 815 | ext4_free_clusters_after_init(sb, group, gdp)); |
Kemeng Shi | 1df9bde | 2023-02-22 04:30:27 +0800 | [diff] [blame] | 816 | ext4_block_bitmap_csum_set(sb, gdp, block_bitmap_bh); |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 817 | ext4_group_desc_csum_set(sb, group, gdp); |
| 818 | } |
| 819 | ext4_unlock_group(sb, group); |
| 820 | brelse(block_bitmap_bh); |
| 821 | |
| 822 | if (err) { |
| 823 | ext4_std_error(sb, err); |
| 824 | goto out; |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | /* Update the relevant bg descriptor fields */ |
| 829 | if (ext4_has_group_desc_csum(sb)) { |
| 830 | int free; |
| 831 | |
| 832 | ext4_lock_group(sb, group); /* while we modify the bg desc */ |
| 833 | free = EXT4_INODES_PER_GROUP(sb) - |
| 834 | ext4_itable_unused_count(sb, gdp); |
| 835 | if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { |
| 836 | gdp->bg_flags &= cpu_to_le16(~EXT4_BG_INODE_UNINIT); |
| 837 | free = 0; |
| 838 | } |
| 839 | |
| 840 | /* |
| 841 | * Check the relative inode number against the last used |
| 842 | * relative inode number in this group. if it is greater |
| 843 | * we need to update the bg_itable_unused count |
| 844 | */ |
| 845 | if (bit >= free) |
| 846 | ext4_itable_unused_set(sb, gdp, |
| 847 | (EXT4_INODES_PER_GROUP(sb) - bit - 1)); |
| 848 | } else { |
| 849 | ext4_lock_group(sb, group); |
| 850 | } |
| 851 | |
| 852 | ext4_free_inodes_set(sb, gdp, ext4_free_inodes_count(sb, gdp) - 1); |
| 853 | if (ext4_has_group_desc_csum(sb)) { |
Kemeng Shi | 4fd873c | 2023-02-22 04:30:25 +0800 | [diff] [blame] | 854 | ext4_inode_bitmap_csum_set(sb, gdp, inode_bitmap_bh, |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 855 | EXT4_INODES_PER_GROUP(sb) / 8); |
| 856 | ext4_group_desc_csum_set(sb, group, gdp); |
| 857 | } |
| 858 | |
| 859 | ext4_unlock_group(sb, group); |
| 860 | err = ext4_handle_dirty_metadata(NULL, NULL, group_desc_bh); |
| 861 | sync_dirty_buffer(group_desc_bh); |
| 862 | out: |
| 863 | return err; |
| 864 | } |
| 865 | |
Eric Biggers | 177cc0e | 2020-09-16 21:11:25 -0700 | [diff] [blame] | 866 | static int ext4_xattr_credits_for_new_inode(struct inode *dir, mode_t mode, |
| 867 | bool encrypt) |
| 868 | { |
| 869 | struct super_block *sb = dir->i_sb; |
| 870 | int nblocks = 0; |
| 871 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Christian Brauner | cac2f8b | 2022-09-22 17:17:00 +0200 | [diff] [blame] | 872 | struct posix_acl *p = get_inode_acl(dir, ACL_TYPE_DEFAULT); |
Eric Biggers | 177cc0e | 2020-09-16 21:11:25 -0700 | [diff] [blame] | 873 | |
| 874 | if (IS_ERR(p)) |
| 875 | return PTR_ERR(p); |
| 876 | if (p) { |
| 877 | int acl_size = p->a_count * sizeof(ext4_acl_entry); |
| 878 | |
| 879 | nblocks += (S_ISDIR(mode) ? 2 : 1) * |
| 880 | __ext4_xattr_set_credits(sb, NULL /* inode */, |
| 881 | NULL /* block_bh */, acl_size, |
| 882 | true /* is_create */); |
| 883 | posix_acl_release(p); |
| 884 | } |
| 885 | #endif |
| 886 | |
| 887 | #ifdef CONFIG_SECURITY |
| 888 | { |
| 889 | int num_security_xattrs = 1; |
| 890 | |
| 891 | #ifdef CONFIG_INTEGRITY |
| 892 | num_security_xattrs++; |
| 893 | #endif |
| 894 | /* |
| 895 | * We assume that security xattrs are never more than 1k. |
| 896 | * In practice they are under 128 bytes. |
| 897 | */ |
| 898 | nblocks += num_security_xattrs * |
| 899 | __ext4_xattr_set_credits(sb, NULL /* inode */, |
| 900 | NULL /* block_bh */, 1024, |
| 901 | true /* is_create */); |
| 902 | } |
| 903 | #endif |
| 904 | if (encrypt) |
| 905 | nblocks += __ext4_xattr_set_credits(sb, |
| 906 | NULL /* inode */, |
| 907 | NULL /* block_bh */, |
| 908 | FSCRYPT_SET_CONTEXT_MAX_SIZE, |
| 909 | true /* is_create */); |
| 910 | return nblocks; |
| 911 | } |
| 912 | |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 913 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 914 | * There are two policies for allocating an inode. If the new inode is |
| 915 | * a directory, then a forward search is made for a block group with both |
| 916 | * free space and a low directory-to-inode ratio; if that fails, then of |
| 917 | * the groups with above-average free space, that group with the fewest |
| 918 | * directories already is chosen. |
| 919 | * |
| 920 | * For other inodes, search forward from the parent directory's block |
| 921 | * group to find a free inode. |
| 922 | */ |
Christian Brauner | f2d4014 | 2023-01-13 12:49:25 +0100 | [diff] [blame] | 923 | struct inode *__ext4_new_inode(struct mnt_idmap *idmap, |
Christian Brauner | 14f3db5 | 2021-01-21 14:19:57 +0100 | [diff] [blame] | 924 | handle_t *handle, struct inode *dir, |
Theodore Ts'o | 1139575 | 2013-02-09 16:27:09 -0500 | [diff] [blame] | 925 | umode_t mode, const struct qstr *qstr, |
Tahsin Erdogan | 1b917ed | 2017-06-21 21:21:39 -0400 | [diff] [blame] | 926 | __u32 goal, uid_t *owner, __u32 i_flags, |
| 927 | int handle_type, unsigned int line_no, |
| 928 | int nblocks) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 929 | { |
| 930 | struct super_block *sb; |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 931 | struct buffer_head *inode_bitmap_bh = NULL; |
| 932 | struct buffer_head *group_desc_bh; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 933 | ext4_group_t ngroups, group = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 934 | unsigned long ino = 0; |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 935 | struct inode *inode; |
| 936 | struct ext4_group_desc *gdp = NULL; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 937 | struct ext4_inode_info *ei; |
| 938 | struct ext4_sb_info *sbi; |
Jan Kara | a7cdade | 2015-06-29 16:22:54 +0200 | [diff] [blame] | 939 | int ret2, err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 940 | struct inode *ret; |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 941 | ext4_group_t i; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 942 | ext4_group_t flex_group; |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 943 | struct ext4_group_info *grp = NULL; |
Eric Biggers | 02ce531 | 2020-09-16 21:11:26 -0700 | [diff] [blame] | 944 | bool encrypt = false; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 945 | |
| 946 | /* Cannot create files in a deleted directory */ |
| 947 | if (!dir || !dir->i_nlink) |
| 948 | return ERR_PTR(-EPERM); |
| 949 | |
Tahsin Erdogan | af65207 | 2017-07-06 00:01:59 -0400 | [diff] [blame] | 950 | sb = dir->i_sb; |
| 951 | sbi = EXT4_SB(sb); |
| 952 | |
Jan Kara | eb8ab44 | 2023-06-16 18:50:49 +0200 | [diff] [blame] | 953 | if (unlikely(ext4_forced_shutdown(sb))) |
Theodore Ts'o | 0db1ff2 | 2017-02-05 01:28:48 -0500 | [diff] [blame] | 954 | return ERR_PTR(-EIO); |
| 955 | |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 956 | ngroups = ext4_get_groups_count(sb); |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 957 | trace_ext4_request_inode(dir, mode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 958 | inode = new_inode(sb); |
| 959 | if (!inode) |
| 960 | return ERR_PTR(-ENOMEM); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 961 | ei = EXT4_I(inode); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 962 | |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 963 | /* |
Adam Buchbinder | b8a07463 | 2016-03-09 23:49:05 -0500 | [diff] [blame] | 964 | * Initialize owners and quota early so that we don't have to account |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 965 | * for quota initialization worst case in standard inode creating |
| 966 | * transaction |
| 967 | */ |
| 968 | if (owner) { |
| 969 | inode->i_mode = mode; |
| 970 | i_uid_write(inode, owner[0]); |
| 971 | i_gid_write(inode, owner[1]); |
| 972 | } else if (test_opt(sb, GRPID)) { |
| 973 | inode->i_mode = mode; |
Christian Brauner | c14329d | 2023-01-13 12:49:31 +0100 | [diff] [blame] | 974 | inode_fsuid_set(inode, idmap); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 975 | inode->i_gid = dir->i_gid; |
| 976 | } else |
Christian Brauner | f2d4014 | 2023-01-13 12:49:25 +0100 | [diff] [blame] | 977 | inode_init_owner(idmap, inode, dir, mode); |
Li Xi | 040cb37 | 2016-01-08 16:01:21 -0500 | [diff] [blame] | 978 | |
Kaho Ng | 0b7b777 | 2016-09-05 23:11:58 -0400 | [diff] [blame] | 979 | if (ext4_has_feature_project(sb) && |
Li Xi | 040cb37 | 2016-01-08 16:01:21 -0500 | [diff] [blame] | 980 | ext4_test_inode_flag(dir, EXT4_INODE_PROJINHERIT)) |
| 981 | ei->i_projid = EXT4_I(dir)->i_projid; |
| 982 | else |
| 983 | ei->i_projid = make_kprojid(&init_user_ns, EXT4_DEF_PROJID); |
| 984 | |
Eric Biggers | 02ce531 | 2020-09-16 21:11:26 -0700 | [diff] [blame] | 985 | if (!(i_flags & EXT4_EA_INODE_FL)) { |
| 986 | err = fscrypt_prepare_new_inode(dir, inode, &encrypt); |
| 987 | if (err) |
| 988 | goto out; |
| 989 | } |
| 990 | |
Jan Kara | a7cdade | 2015-06-29 16:22:54 +0200 | [diff] [blame] | 991 | err = dquot_initialize(inode); |
| 992 | if (err) |
| 993 | goto out; |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 994 | |
Eric Biggers | 02ce531 | 2020-09-16 21:11:26 -0700 | [diff] [blame] | 995 | if (!handle && sbi->s_journal && !(i_flags & EXT4_EA_INODE_FL)) { |
| 996 | ret2 = ext4_xattr_credits_for_new_inode(dir, mode, encrypt); |
| 997 | if (ret2 < 0) { |
| 998 | err = ret2; |
| 999 | goto out; |
| 1000 | } |
| 1001 | nblocks += ret2; |
| 1002 | } |
| 1003 | |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 1004 | if (!goal) |
| 1005 | goal = sbi->s_inode_goal; |
| 1006 | |
Johann Lombardi | e646286 | 2009-07-05 23:45:11 -0400 | [diff] [blame] | 1007 | if (goal && goal <= le32_to_cpu(sbi->s_es->s_inodes_count)) { |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 1008 | group = (goal - 1) / EXT4_INODES_PER_GROUP(sb); |
| 1009 | ino = (goal - 1) % EXT4_INODES_PER_GROUP(sb); |
| 1010 | ret2 = 0; |
| 1011 | goto got_group; |
| 1012 | } |
| 1013 | |
Lukas Czerner | 4113c4c | 2011-10-08 14:34:47 -0400 | [diff] [blame] | 1014 | if (S_ISDIR(mode)) |
| 1015 | ret2 = find_group_orlov(sb, dir, &group, mode, qstr); |
| 1016 | else |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 1017 | ret2 = find_group_other(sb, dir, &group, mode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1018 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1019 | got_group: |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 1020 | EXT4_I(dir)->i_last_alloc_group = group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1021 | err = -ENOSPC; |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1022 | if (ret2 == -1) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1023 | goto out; |
| 1024 | |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1025 | /* |
| 1026 | * Normally we will only go through one pass of this loop, |
| 1027 | * unless we get unlucky and it turns out the group we selected |
| 1028 | * had its last inode grabbed by someone else. |
| 1029 | */ |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 1030 | for (i = 0; i < ngroups; i++, ino = 0) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1031 | err = -EIO; |
| 1032 | |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1033 | gdp = ext4_get_group_desc(sb, group, &group_desc_bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1034 | if (!gdp) |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1035 | goto out; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1036 | |
Yongqiang Yang | f2a09af | 2012-09-23 23:16:03 -0400 | [diff] [blame] | 1037 | /* |
| 1038 | * Check free inodes count before loading bitmap. |
| 1039 | */ |
Wang Shilong | 2fe435d8 | 2017-08-24 11:58:18 -0400 | [diff] [blame] | 1040 | if (ext4_free_inodes_count(sb, gdp) == 0) |
| 1041 | goto next_group; |
Yongqiang Yang | f2a09af | 2012-09-23 23:16:03 -0400 | [diff] [blame] | 1042 | |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 1043 | if (!(sbi->s_mount_state & EXT4_FC_REPLAY)) { |
| 1044 | grp = ext4_get_group_info(sb, group); |
| 1045 | /* |
| 1046 | * Skip groups with already-known suspicious inode |
| 1047 | * tables |
| 1048 | */ |
Theodore Ts'o | 5354b2a | 2023-04-29 00:06:28 -0400 | [diff] [blame] | 1049 | if (!grp || EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 1050 | goto next_group; |
| 1051 | } |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 1052 | |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1053 | brelse(inode_bitmap_bh); |
| 1054 | inode_bitmap_bh = ext4_read_inode_bitmap(sb, group); |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 1055 | /* Skip groups with suspicious inode tables */ |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 1056 | if (((!(sbi->s_mount_state & EXT4_FC_REPLAY)) |
| 1057 | && EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) || |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 1058 | IS_ERR(inode_bitmap_bh)) { |
| 1059 | inode_bitmap_bh = NULL; |
Wang Shilong | 2fe435d8 | 2017-08-24 11:58:18 -0400 | [diff] [blame] | 1060 | goto next_group; |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 1061 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1062 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1063 | repeat_in_this_group: |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 1064 | ret2 = find_inode_bit(sb, group, inode_bitmap_bh, &ino); |
| 1065 | if (!ret2) |
Theodore Ts'o | a34eb50 | 2013-07-26 15:15:46 -0400 | [diff] [blame] | 1066 | goto next_group; |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 1067 | |
| 1068 | if (group == 0 && (ino + 1) < EXT4_FIRST_INO(sb)) { |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1069 | ext4_error(sb, "reserved inode found cleared - " |
| 1070 | "inode=%lu", ino + 1); |
Wang Shilong | 206f6d5 | 2018-05-12 12:15:21 -0400 | [diff] [blame] | 1071 | ext4_mark_group_bitmap_corrupted(sb, group, |
| 1072 | EXT4_GROUP_INFO_IBITMAP_CORRUPT); |
Wang Shilong | 2fe435d8 | 2017-08-24 11:58:18 -0400 | [diff] [blame] | 1073 | goto next_group; |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1074 | } |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 1075 | |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 1076 | if ((!(sbi->s_mount_state & EXT4_FC_REPLAY)) && !handle) { |
Theodore Ts'o | 1139575 | 2013-02-09 16:27:09 -0500 | [diff] [blame] | 1077 | BUG_ON(nblocks <= 0); |
changfengnan | 5f3e240 | 2022-10-08 20:05:18 +0800 | [diff] [blame] | 1078 | handle = __ext4_journal_start_sb(NULL, dir->i_sb, |
| 1079 | line_no, handle_type, nblocks, 0, |
yangerkun | a70fd5a | 2019-12-13 09:49:00 +0800 | [diff] [blame] | 1080 | ext4_trans_default_revoke_credits(sb)); |
Theodore Ts'o | 1139575 | 2013-02-09 16:27:09 -0500 | [diff] [blame] | 1081 | if (IS_ERR(handle)) { |
| 1082 | err = PTR_ERR(handle); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1083 | ext4_std_error(sb, err); |
| 1084 | goto out; |
Theodore Ts'o | 1139575 | 2013-02-09 16:27:09 -0500 | [diff] [blame] | 1085 | } |
| 1086 | } |
Eric Sandeen | ffb5387 | 2012-10-28 22:24:57 -0400 | [diff] [blame] | 1087 | BUFFER_TRACE(inode_bitmap_bh, "get_write_access"); |
Jan Kara | 188c299 | 2021-08-16 11:57:04 +0200 | [diff] [blame] | 1088 | err = ext4_journal_get_write_access(handle, sb, inode_bitmap_bh, |
| 1089 | EXT4_JTR_NONE); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1090 | if (err) { |
| 1091 | ext4_std_error(sb, err); |
| 1092 | goto out; |
| 1093 | } |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1094 | ext4_lock_group(sb, group); |
| 1095 | ret2 = ext4_test_and_set_bit(ino, inode_bitmap_bh->b_data); |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 1096 | if (ret2) { |
| 1097 | /* Someone already took the bit. Repeat the search |
| 1098 | * with lock held. |
| 1099 | */ |
| 1100 | ret2 = find_inode_bit(sb, group, inode_bitmap_bh, &ino); |
| 1101 | if (ret2) { |
| 1102 | ext4_set_bit(ino, inode_bitmap_bh->b_data); |
| 1103 | ret2 = 0; |
| 1104 | } else { |
| 1105 | ret2 = 1; /* we didn't grab the inode */ |
| 1106 | } |
| 1107 | } |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1108 | ext4_unlock_group(sb, group); |
| 1109 | ino++; /* the inode bitmap is zero-based */ |
| 1110 | if (!ret2) |
| 1111 | goto got; /* we grabbed the inode! */ |
Wang Shilong | 901ed07 | 2017-08-24 12:56:35 -0400 | [diff] [blame] | 1112 | |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1113 | if (ino < EXT4_INODES_PER_GROUP(sb)) |
| 1114 | goto repeat_in_this_group; |
Theodore Ts'o | a34eb50 | 2013-07-26 15:15:46 -0400 | [diff] [blame] | 1115 | next_group: |
| 1116 | if (++group == ngroups) |
| 1117 | group = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1118 | } |
| 1119 | err = -ENOSPC; |
| 1120 | goto out; |
| 1121 | |
| 1122 | got: |
Eric Sandeen | ffb5387 | 2012-10-28 22:24:57 -0400 | [diff] [blame] | 1123 | BUFFER_TRACE(inode_bitmap_bh, "call ext4_handle_dirty_metadata"); |
| 1124 | err = ext4_handle_dirty_metadata(handle, NULL, inode_bitmap_bh); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1125 | if (err) { |
| 1126 | ext4_std_error(sb, err); |
| 1127 | goto out; |
| 1128 | } |
Eric Sandeen | ffb5387 | 2012-10-28 22:24:57 -0400 | [diff] [blame] | 1129 | |
Theodore Ts'o | 61c219f | 2014-07-05 16:28:35 -0400 | [diff] [blame] | 1130 | BUFFER_TRACE(group_desc_bh, "get_write_access"); |
Jan Kara | 188c299 | 2021-08-16 11:57:04 +0200 | [diff] [blame] | 1131 | err = ext4_journal_get_write_access(handle, sb, group_desc_bh, |
| 1132 | EXT4_JTR_NONE); |
Theodore Ts'o | 61c219f | 2014-07-05 16:28:35 -0400 | [diff] [blame] | 1133 | if (err) { |
| 1134 | ext4_std_error(sb, err); |
| 1135 | goto out; |
| 1136 | } |
| 1137 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1138 | /* We may have to initialize the block bitmap if it isn't already */ |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 1139 | if (ext4_has_group_desc_csum(sb) && |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1140 | gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1141 | struct buffer_head *block_bitmap_bh; |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1142 | |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1143 | block_bitmap_bh = ext4_read_block_bitmap(sb, group); |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 1144 | if (IS_ERR(block_bitmap_bh)) { |
| 1145 | err = PTR_ERR(block_bitmap_bh); |
Jan Kara | 599a9b7 | 2014-10-30 10:53:16 -0400 | [diff] [blame] | 1146 | goto out; |
| 1147 | } |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1148 | BUFFER_TRACE(block_bitmap_bh, "get block bitmap access"); |
Jan Kara | 188c299 | 2021-08-16 11:57:04 +0200 | [diff] [blame] | 1149 | err = ext4_journal_get_write_access(handle, sb, block_bitmap_bh, |
| 1150 | EXT4_JTR_NONE); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1151 | if (err) { |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1152 | brelse(block_bitmap_bh); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1153 | ext4_std_error(sb, err); |
| 1154 | goto out; |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1155 | } |
| 1156 | |
Theodore Ts'o | fd034a8 | 2011-09-09 18:42:51 -0400 | [diff] [blame] | 1157 | BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap"); |
| 1158 | err = ext4_handle_dirty_metadata(handle, NULL, block_bitmap_bh); |
Theodore Ts'o | fd034a8 | 2011-09-09 18:42:51 -0400 | [diff] [blame] | 1159 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1160 | /* recheck and clear flag under lock if we still need to */ |
Theodore Ts'o | fd034a8 | 2011-09-09 18:42:51 -0400 | [diff] [blame] | 1161 | ext4_lock_group(sb, group); |
Theodore Ts'o | 8844618 | 2018-06-14 00:58:00 -0400 | [diff] [blame] | 1162 | if (ext4_has_group_desc_csum(sb) && |
| 1163 | (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))) { |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1164 | gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT); |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 1165 | ext4_free_group_clusters_set(sb, gdp, |
Theodore Ts'o | cff1dfd7 | 2011-09-09 19:12:51 -0400 | [diff] [blame] | 1166 | ext4_free_clusters_after_init(sb, group, gdp)); |
Kemeng Shi | 1df9bde | 2023-02-22 04:30:27 +0800 | [diff] [blame] | 1167 | ext4_block_bitmap_csum_set(sb, gdp, block_bitmap_bh); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 1168 | ext4_group_desc_csum_set(sb, group, gdp); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1169 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 1170 | ext4_unlock_group(sb, group); |
Theodore Ts'o | aeb1e5d6 | 2012-11-29 21:21:22 -0500 | [diff] [blame] | 1171 | brelse(block_bitmap_bh); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1172 | |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1173 | if (err) { |
| 1174 | ext4_std_error(sb, err); |
| 1175 | goto out; |
| 1176 | } |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1177 | } |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1178 | |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1179 | /* Update the relevant bg descriptor fields */ |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 1180 | if (ext4_has_group_desc_csum(sb)) { |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1181 | int free; |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 1182 | struct ext4_group_info *grp = NULL; |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1183 | |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 1184 | if (!(sbi->s_mount_state & EXT4_FC_REPLAY)) { |
| 1185 | grp = ext4_get_group_info(sb, group); |
Theodore Ts'o | 5354b2a | 2023-04-29 00:06:28 -0400 | [diff] [blame] | 1186 | if (!grp) { |
| 1187 | err = -EFSCORRUPTED; |
| 1188 | goto out; |
| 1189 | } |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 1190 | down_read(&grp->alloc_sem); /* |
| 1191 | * protect vs itable |
| 1192 | * lazyinit |
| 1193 | */ |
| 1194 | } |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1195 | ext4_lock_group(sb, group); /* while we modify the bg desc */ |
| 1196 | free = EXT4_INODES_PER_GROUP(sb) - |
| 1197 | ext4_itable_unused_count(sb, gdp); |
| 1198 | if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { |
| 1199 | gdp->bg_flags &= cpu_to_le16(~EXT4_BG_INODE_UNINIT); |
| 1200 | free = 0; |
| 1201 | } |
| 1202 | /* |
| 1203 | * Check the relative inode number against the last used |
| 1204 | * relative inode number in this group. if it is greater |
| 1205 | * we need to update the bg_itable_unused count |
| 1206 | */ |
| 1207 | if (ino > free) |
| 1208 | ext4_itable_unused_set(sb, gdp, |
| 1209 | (EXT4_INODES_PER_GROUP(sb) - ino)); |
Harshad Shirwadkar | 8016e29 | 2020-10-15 13:37:59 -0700 | [diff] [blame] | 1210 | if (!(sbi->s_mount_state & EXT4_FC_REPLAY)) |
| 1211 | up_read(&grp->alloc_sem); |
Tao Ma | 6f2e9f0 | 2012-05-28 18:20:59 -0400 | [diff] [blame] | 1212 | } else { |
| 1213 | ext4_lock_group(sb, group); |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1214 | } |
Tao Ma | 6f2e9f0 | 2012-05-28 18:20:59 -0400 | [diff] [blame] | 1215 | |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1216 | ext4_free_inodes_set(sb, gdp, ext4_free_inodes_count(sb, gdp) - 1); |
| 1217 | if (S_ISDIR(mode)) { |
| 1218 | ext4_used_dirs_set(sb, gdp, ext4_used_dirs_count(sb, gdp) + 1); |
| 1219 | if (sbi->s_log_groups_per_flex) { |
| 1220 | ext4_group_t f = ext4_flex_group(sbi, group); |
| 1221 | |
Suraj Jitindar Singh | 7c99072 | 2020-02-18 19:08:51 -0800 | [diff] [blame] | 1222 | atomic_inc(&sbi_array_rcu_deref(sbi, s_flex_groups, |
| 1223 | f)->used_dirs); |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1224 | } |
| 1225 | } |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 1226 | if (ext4_has_group_desc_csum(sb)) { |
Kemeng Shi | 4fd873c | 2023-02-22 04:30:25 +0800 | [diff] [blame] | 1227 | ext4_inode_bitmap_csum_set(sb, gdp, inode_bitmap_bh, |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 1228 | EXT4_INODES_PER_GROUP(sb) / 8); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 1229 | ext4_group_desc_csum_set(sb, group, gdp); |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1230 | } |
Tao Ma | 6f2e9f0 | 2012-05-28 18:20:59 -0400 | [diff] [blame] | 1231 | ext4_unlock_group(sb, group); |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1232 | |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1233 | BUFFER_TRACE(group_desc_bh, "call ext4_handle_dirty_metadata"); |
| 1234 | err = ext4_handle_dirty_metadata(handle, NULL, group_desc_bh); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1235 | if (err) { |
| 1236 | ext4_std_error(sb, err); |
| 1237 | goto out; |
| 1238 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1239 | |
| 1240 | percpu_counter_dec(&sbi->s_freeinodes_counter); |
| 1241 | if (S_ISDIR(mode)) |
| 1242 | percpu_counter_inc(&sbi->s_dirs_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1243 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1244 | if (sbi->s_log_groups_per_flex) { |
| 1245 | flex_group = ext4_flex_group(sbi, group); |
Suraj Jitindar Singh | 7c99072 | 2020-02-18 19:08:51 -0800 | [diff] [blame] | 1246 | atomic_dec(&sbi_array_rcu_deref(sbi, s_flex_groups, |
| 1247 | flex_group)->free_inodes); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1248 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1249 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1250 | inode->i_ino = ino + group * EXT4_INODES_PER_GROUP(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1251 | /* This is the optimal IO size (for stat), not the fs block size */ |
| 1252 | inode->i_blocks = 0; |
Jeff Layton | b898ab2 | 2023-10-04 14:52:20 -0400 | [diff] [blame] | 1253 | simple_inode_init_ts(inode); |
| 1254 | ei->i_crtime = inode_get_mtime(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1255 | |
| 1256 | memset(ei->i_data, 0, sizeof(ei->i_data)); |
| 1257 | ei->i_dir_start_lookup = 0; |
| 1258 | ei->i_disksize = 0; |
| 1259 | |
Eryu Guan | 4af8350 | 2011-10-31 18:21:29 -0400 | [diff] [blame] | 1260 | /* Don't inherit extent flag from directory, amongst others. */ |
Duane Griffin | 2dc6b0d | 2009-02-15 18:09:20 -0500 | [diff] [blame] | 1261 | ei->i_flags = |
| 1262 | ext4_mask_flags(mode, EXT4_I(dir)->i_flags & EXT4_FL_INHERITED); |
Tahsin Erdogan | 1b917ed | 2017-06-21 21:21:39 -0400 | [diff] [blame] | 1263 | ei->i_flags |= i_flags; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1264 | ei->i_file_acl = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1265 | ei->i_dtime = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1266 | ei->i_block_group = group; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 1267 | ei->i_last_alloc_group = ~0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1268 | |
Ira Weiny | 043546e | 2020-05-28 07:59:59 -0700 | [diff] [blame] | 1269 | ext4_set_inode_flags(inode, true); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1270 | if (IS_DIRSYNC(inode)) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1271 | ext4_handle_sync(handle); |
Al Viro | 6b38e84 | 2008-12-30 02:03:31 -0500 | [diff] [blame] | 1272 | if (insert_inode_locked(inode) < 0) { |
Jan Kara | acd6ad8 | 2011-12-18 17:37:02 -0500 | [diff] [blame] | 1273 | /* |
| 1274 | * Likely a bitmap corruption causing inode to be allocated |
| 1275 | * twice. |
| 1276 | */ |
| 1277 | err = -EIO; |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1278 | ext4_error(sb, "failed to insert inode %lu: doubly allocated?", |
| 1279 | inode->i_ino); |
Wang Shilong | 206f6d5 | 2018-05-12 12:15:21 -0400 | [diff] [blame] | 1280 | ext4_mark_group_bitmap_corrupted(sb, group, |
| 1281 | EXT4_GROUP_INFO_IBITMAP_CORRUPT); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1282 | goto out; |
Al Viro | 6b38e84 | 2008-12-30 02:03:31 -0500 | [diff] [blame] | 1283 | } |
Jason A. Donenfeld | a251c17 | 2022-10-05 17:43:22 +0200 | [diff] [blame] | 1284 | inode->i_generation = get_random_u32(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1285 | |
Darrick J. Wong | 814525f | 2012-04-29 18:31:10 -0400 | [diff] [blame] | 1286 | /* Precompute checksum seed for inode metadata */ |
Dmitry Monakhov | 9aa5d32b | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 1287 | if (ext4_has_metadata_csum(sb)) { |
Darrick J. Wong | 814525f | 2012-04-29 18:31:10 -0400 | [diff] [blame] | 1288 | __u32 csum; |
Darrick J. Wong | 814525f | 2012-04-29 18:31:10 -0400 | [diff] [blame] | 1289 | __le32 inum = cpu_to_le32(inode->i_ino); |
| 1290 | __le32 gen = cpu_to_le32(inode->i_generation); |
| 1291 | csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, |
| 1292 | sizeof(inum)); |
| 1293 | ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, |
| 1294 | sizeof(gen)); |
| 1295 | } |
| 1296 | |
Theodore Ts'o | 353eb83 | 2011-01-10 12:18:25 -0500 | [diff] [blame] | 1297 | ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */ |
Theodore Ts'o | 19f5fb7 | 2010-01-24 14:34:07 -0500 | [diff] [blame] | 1298 | ext4_set_inode_state(inode, EXT4_STATE_NEW); |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 1299 | |
Jun Piao | 49598e0 | 2018-01-11 13:17:49 -0500 | [diff] [blame] | 1300 | ei->i_extra_isize = sbi->s_want_extra_isize; |
Tao Ma | f08225d | 2012-12-10 14:06:03 -0500 | [diff] [blame] | 1301 | ei->i_inline_off = 0; |
Theodore Ts'o | 4811d99 | 2021-04-12 17:19:00 -0400 | [diff] [blame] | 1302 | if (ext4_has_feature_inline_data(sb) && |
| 1303 | (!(ei->i_flags & EXT4_DAX_FL) || S_ISDIR(mode))) |
Tao Ma | f08225d | 2012-12-10 14:06:03 -0500 | [diff] [blame] | 1304 | ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1305 | ret = inode; |
Christoph Hellwig | 63936dd | 2010-03-03 09:05:01 -0500 | [diff] [blame] | 1306 | err = dquot_alloc_inode(inode); |
| 1307 | if (err) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1308 | goto fail_drop; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1309 | |
Eric Biggers | aa1dca3 | 2017-05-02 00:49:54 -0400 | [diff] [blame] | 1310 | /* |
| 1311 | * Since the encryption xattr will always be unique, create it first so |
| 1312 | * that it's less likely to end up in an external xattr block and |
| 1313 | * prevent its deduplication. |
| 1314 | */ |
| 1315 | if (encrypt) { |
Eric Biggers | 02ce531 | 2020-09-16 21:11:26 -0700 | [diff] [blame] | 1316 | err = fscrypt_set_context(inode, handle); |
Eric Biggers | aa1dca3 | 2017-05-02 00:49:54 -0400 | [diff] [blame] | 1317 | if (err) |
| 1318 | goto fail_free_drop; |
| 1319 | } |
| 1320 | |
Tahsin Erdogan | 1b917ed | 2017-06-21 21:21:39 -0400 | [diff] [blame] | 1321 | if (!(ei->i_flags & EXT4_EA_INODE_FL)) { |
| 1322 | err = ext4_init_acl(handle, inode, dir); |
| 1323 | if (err) |
| 1324 | goto fail_free_drop; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1325 | |
Tahsin Erdogan | ad47f953 | 2017-07-06 00:00:59 -0400 | [diff] [blame] | 1326 | err = ext4_init_security(handle, inode, dir, qstr); |
| 1327 | if (err) |
| 1328 | goto fail_free_drop; |
| 1329 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1330 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 1331 | if (ext4_has_feature_extents(sb)) { |
Eric Sandeen | e4079a1 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1332 | /* set extent flag only for directory, file and normal symlink*/ |
Aneesh Kumar K.V | e65187e | 2008-04-29 08:11:12 -0400 | [diff] [blame] | 1333 | if (S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) { |
Dmitry Monakhov | 12e9b89 | 2010-05-16 22:00:00 -0400 | [diff] [blame] | 1334 | ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS); |
Aneesh Kumar K.V | 42bf038 | 2008-02-25 16:38:03 -0500 | [diff] [blame] | 1335 | ext4_ext_tree_init(handle, inode); |
Aneesh Kumar K.V | 42bf038 | 2008-02-25 16:38:03 -0500 | [diff] [blame] | 1336 | } |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 1337 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1338 | |
Luis Henriques (SUSE) | 2d4d6bd | 2024-05-27 17:14:47 +0100 | [diff] [blame] | 1339 | ext4_update_inode_fsync_trans(handle, inode, 1); |
Theodore Ts'o | 688f869 | 2011-03-16 17:16:31 -0400 | [diff] [blame] | 1340 | |
Aneesh Kumar K.V | 8753e88 | 2008-04-29 22:00:36 -0400 | [diff] [blame] | 1341 | err = ext4_mark_inode_dirty(handle, inode); |
| 1342 | if (err) { |
| 1343 | ext4_std_error(sb, err); |
| 1344 | goto fail_free_drop; |
| 1345 | } |
| 1346 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1347 | ext4_debug("allocating inode %lu\n", inode->i_ino); |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 1348 | trace_ext4_allocate_inode(inode, dir, mode); |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1349 | brelse(inode_bitmap_bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1350 | return ret; |
| 1351 | |
| 1352 | fail_free_drop: |
Christoph Hellwig | 63936dd | 2010-03-03 09:05:01 -0500 | [diff] [blame] | 1353 | dquot_free_inode(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1354 | fail_drop: |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 1355 | clear_nlink(inode); |
Al Viro | 6b38e84 | 2008-12-30 02:03:31 -0500 | [diff] [blame] | 1356 | unlock_new_inode(inode); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1357 | out: |
| 1358 | dquot_drop(inode); |
| 1359 | inode->i_flags |= S_NOQUOTA; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1360 | iput(inode); |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1361 | brelse(inode_bitmap_bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1362 | return ERR_PTR(err); |
| 1363 | } |
| 1364 | |
| 1365 | /* Verify that we are loading a valid orphan from disk */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1366 | struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1367 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1368 | unsigned long max_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count); |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1369 | ext4_group_t block_group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1370 | int bit; |
Theodore Ts'o | 7827a7f | 2016-04-30 00:49:54 -0400 | [diff] [blame] | 1371 | struct buffer_head *bitmap_bh = NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1372 | struct inode *inode = NULL; |
Theodore Ts'o | 7827a7f | 2016-04-30 00:49:54 -0400 | [diff] [blame] | 1373 | int err = -EFSCORRUPTED; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1374 | |
Theodore Ts'o | 7827a7f | 2016-04-30 00:49:54 -0400 | [diff] [blame] | 1375 | if (ino < EXT4_FIRST_INO(sb) || ino > max_ino) |
| 1376 | goto bad_orphan; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1377 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1378 | block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); |
| 1379 | bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 1380 | bitmap_bh = ext4_read_inode_bitmap(sb, block_group); |
Wang Shilong | 206f6d5 | 2018-05-12 12:15:21 -0400 | [diff] [blame] | 1381 | if (IS_ERR(bitmap_bh)) |
Al Viro | e884bce | 2018-10-10 16:41:40 -0400 | [diff] [blame] | 1382 | return ERR_CAST(bitmap_bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1383 | |
| 1384 | /* Having the inode bit set should be a 100% indicator that this |
| 1385 | * is a valid orphan (no e2fsck run on fs). Orphans also include |
| 1386 | * inodes that were being truncated, so we can't check i_nlink==0. |
| 1387 | */ |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1388 | if (!ext4_test_bit(bit, bitmap_bh->b_data)) |
| 1389 | goto bad_orphan; |
| 1390 | |
Theodore Ts'o | 8a36397 | 2018-12-19 12:29:13 -0500 | [diff] [blame] | 1391 | inode = ext4_iget(sb, ino, EXT4_IGET_NORMAL); |
Theodore Ts'o | 7827a7f | 2016-04-30 00:49:54 -0400 | [diff] [blame] | 1392 | if (IS_ERR(inode)) { |
| 1393 | err = PTR_ERR(inode); |
Theodore Ts'o | 54d3adb | 2020-03-28 19:33:43 -0400 | [diff] [blame] | 1394 | ext4_error_err(sb, -err, |
| 1395 | "couldn't read orphan inode %lu (err %d)", |
| 1396 | ino, err); |
Xiyu Yang | 3bbd0ef | 2020-04-23 13:09:27 +0800 | [diff] [blame] | 1397 | brelse(bitmap_bh); |
Theodore Ts'o | 7827a7f | 2016-04-30 00:49:54 -0400 | [diff] [blame] | 1398 | return inode; |
| 1399 | } |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1400 | |
Duane Griffin | 91ef4ca | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1401 | /* |
Theodore Ts'o | c9eb13a | 2016-04-30 00:48:54 -0400 | [diff] [blame] | 1402 | * If the orphans has i_nlinks > 0 then it should be able to |
| 1403 | * be truncated, otherwise it won't be removed from the orphan |
| 1404 | * list during processing and an infinite loop will result. |
| 1405 | * Similarly, it must not be a bad inode. |
Duane Griffin | 91ef4ca | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1406 | */ |
Theodore Ts'o | c9eb13a | 2016-04-30 00:48:54 -0400 | [diff] [blame] | 1407 | if ((inode->i_nlink && !ext4_can_truncate(inode)) || |
| 1408 | is_bad_inode(inode)) |
Duane Griffin | 91ef4ca | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1409 | goto bad_orphan; |
| 1410 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1411 | if (NEXT_ORPHAN(inode) > max_ino) |
| 1412 | goto bad_orphan; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1413 | brelse(bitmap_bh); |
| 1414 | return inode; |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1415 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1416 | bad_orphan: |
Theodore Ts'o | 7827a7f | 2016-04-30 00:49:54 -0400 | [diff] [blame] | 1417 | ext4_error(sb, "bad orphan inode %lu", ino); |
| 1418 | if (bitmap_bh) |
| 1419 | printk(KERN_ERR "ext4_test_bit(bit=%d, block=%llu) = %d\n", |
| 1420 | bit, (unsigned long long)bitmap_bh->b_blocknr, |
| 1421 | ext4_test_bit(bit, bitmap_bh->b_data)); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1422 | if (inode) { |
Theodore Ts'o | 7827a7f | 2016-04-30 00:49:54 -0400 | [diff] [blame] | 1423 | printk(KERN_ERR "is_bad_inode(inode)=%d\n", |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1424 | is_bad_inode(inode)); |
Theodore Ts'o | 7827a7f | 2016-04-30 00:49:54 -0400 | [diff] [blame] | 1425 | printk(KERN_ERR "NEXT_ORPHAN(inode)=%u\n", |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1426 | NEXT_ORPHAN(inode)); |
Theodore Ts'o | 7827a7f | 2016-04-30 00:49:54 -0400 | [diff] [blame] | 1427 | printk(KERN_ERR "max_ino=%lu\n", max_ino); |
| 1428 | printk(KERN_ERR "i_nlink=%u\n", inode->i_nlink); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1429 | /* Avoid freeing blocks if we got a bad deleted inode */ |
| 1430 | if (inode->i_nlink == 0) |
| 1431 | inode->i_blocks = 0; |
| 1432 | iput(inode); |
| 1433 | } |
| 1434 | brelse(bitmap_bh); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1435 | return ERR_PTR(err); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1436 | } |
| 1437 | |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1438 | unsigned long ext4_count_free_inodes(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1439 | { |
| 1440 | unsigned long desc_count; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1441 | struct ext4_group_desc *gdp; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 1442 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1443 | #ifdef EXT4FS_DEBUG |
| 1444 | struct ext4_super_block *es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1445 | unsigned long bitmap_count, x; |
| 1446 | struct buffer_head *bitmap_bh = NULL; |
| 1447 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1448 | es = EXT4_SB(sb)->s_es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1449 | desc_count = 0; |
| 1450 | bitmap_count = 0; |
| 1451 | gdp = NULL; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 1452 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1453 | gdp = ext4_get_group_desc(sb, i, NULL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1454 | if (!gdp) |
| 1455 | continue; |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 1456 | desc_count += ext4_free_inodes_count(sb, gdp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1457 | brelse(bitmap_bh); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 1458 | bitmap_bh = ext4_read_inode_bitmap(sb, i); |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 1459 | if (IS_ERR(bitmap_bh)) { |
| 1460 | bitmap_bh = NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1461 | continue; |
Darrick J. Wong | 9008a58 | 2015-10-17 21:33:24 -0400 | [diff] [blame] | 1462 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1463 | |
Theodore Ts'o | f6fb99c | 2012-06-30 19:14:57 -0400 | [diff] [blame] | 1464 | x = ext4_count_free(bitmap_bh->b_data, |
| 1465 | EXT4_INODES_PER_GROUP(sb) / 8); |
Eric Sandeen | c549a95 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1466 | printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n", |
Peng Tao | 785b4b3 | 2009-07-27 21:44:40 -0400 | [diff] [blame] | 1467 | (unsigned long) i, ext4_free_inodes_count(sb, gdp), x); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1468 | bitmap_count += x; |
| 1469 | } |
| 1470 | brelse(bitmap_bh); |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 1471 | printk(KERN_DEBUG "ext4_count_free_inodes: " |
| 1472 | "stored = %u, computed = %lu, %lu\n", |
| 1473 | le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1474 | return desc_count; |
| 1475 | #else |
| 1476 | desc_count = 0; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 1477 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1478 | gdp = ext4_get_group_desc(sb, i, NULL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1479 | if (!gdp) |
| 1480 | continue; |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 1481 | desc_count += ext4_free_inodes_count(sb, gdp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1482 | cond_resched(); |
| 1483 | } |
| 1484 | return desc_count; |
| 1485 | #endif |
| 1486 | } |
| 1487 | |
| 1488 | /* Called at mount-time, super-block is locked */ |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1489 | unsigned long ext4_count_dirs(struct super_block * sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1490 | { |
| 1491 | unsigned long count = 0; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 1492 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1493 | |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 1494 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1495 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1496 | if (!gdp) |
| 1497 | continue; |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 1498 | count += ext4_used_dirs_count(sb, gdp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1499 | } |
| 1500 | return count; |
| 1501 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1502 | |
| 1503 | /* |
| 1504 | * Zeroes not yet zeroed inode table - just write zeroes through the whole |
| 1505 | * inode table. Must be called without any spinlock held. The only place |
| 1506 | * where it is called from on active part of filesystem is ext4lazyinit |
| 1507 | * thread, so we do not need any special locks, however we have to prevent |
| 1508 | * inode allocation from the current group, so we take alloc_sem lock, to |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 1509 | * block ext4_new_inode() until we are finished. |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1510 | */ |
H Hartley Sweeten | e0cbee3 | 2011-10-18 10:57:51 -0400 | [diff] [blame] | 1511 | int ext4_init_inode_table(struct super_block *sb, ext4_group_t group, |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1512 | int barrier) |
| 1513 | { |
| 1514 | struct ext4_group_info *grp = ext4_get_group_info(sb, group); |
| 1515 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1516 | struct ext4_group_desc *gdp = NULL; |
| 1517 | struct buffer_head *group_desc_bh; |
| 1518 | handle_t *handle; |
| 1519 | ext4_fsblk_t blk; |
| 1520 | int num, ret = 0, used_blks = 0; |
Zhang Yi | a149d2a | 2021-03-31 20:15:16 +0800 | [diff] [blame] | 1521 | unsigned long used_inos = 0; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1522 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1523 | gdp = ext4_get_group_desc(sb, group, &group_desc_bh); |
Theodore Ts'o | 5354b2a | 2023-04-29 00:06:28 -0400 | [diff] [blame] | 1524 | if (!gdp || !grp) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1525 | goto out; |
| 1526 | |
| 1527 | /* |
| 1528 | * We do not need to lock this, because we are the only one |
| 1529 | * handling this flag. |
| 1530 | */ |
| 1531 | if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)) |
| 1532 | goto out; |
| 1533 | |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 1534 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1535 | if (IS_ERR(handle)) { |
| 1536 | ret = PTR_ERR(handle); |
| 1537 | goto out; |
| 1538 | } |
| 1539 | |
| 1540 | down_write(&grp->alloc_sem); |
| 1541 | /* |
| 1542 | * If inode bitmap was already initialized there may be some |
| 1543 | * used inodes so we need to skip blocks with used inodes in |
| 1544 | * inode table. |
| 1545 | */ |
Zhang Yi | a149d2a | 2021-03-31 20:15:16 +0800 | [diff] [blame] | 1546 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT))) { |
| 1547 | used_inos = EXT4_INODES_PER_GROUP(sb) - |
| 1548 | ext4_itable_unused_count(sb, gdp); |
| 1549 | used_blks = DIV_ROUND_UP(used_inos, sbi->s_inodes_per_block); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1550 | |
Zhang Yi | a149d2a | 2021-03-31 20:15:16 +0800 | [diff] [blame] | 1551 | /* Bogus inode unused count? */ |
| 1552 | if (used_blks < 0 || used_blks > sbi->s_itb_per_group) { |
| 1553 | ext4_error(sb, "Something is wrong with group %u: " |
| 1554 | "used itable blocks: %d; " |
| 1555 | "itable unused count: %u", |
| 1556 | group, used_blks, |
| 1557 | ext4_itable_unused_count(sb, gdp)); |
| 1558 | ret = 1; |
| 1559 | goto err_out; |
| 1560 | } |
| 1561 | |
| 1562 | used_inos += group * EXT4_INODES_PER_GROUP(sb); |
| 1563 | /* |
| 1564 | * Are there some uninitialized inodes in the inode table |
| 1565 | * before the first normal inode? |
| 1566 | */ |
| 1567 | if ((used_blks != sbi->s_itb_per_group) && |
| 1568 | (used_inos < EXT4_FIRST_INO(sb))) { |
| 1569 | ext4_error(sb, "Something is wrong with group %u: " |
| 1570 | "itable unused count: %u; " |
| 1571 | "itables initialized count: %ld", |
| 1572 | group, ext4_itable_unused_count(sb, gdp), |
| 1573 | used_inos); |
| 1574 | ret = 1; |
| 1575 | goto err_out; |
| 1576 | } |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1577 | } |
| 1578 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1579 | blk = ext4_inode_table(sb, gdp) + used_blks; |
| 1580 | num = sbi->s_itb_per_group - used_blks; |
| 1581 | |
| 1582 | BUFFER_TRACE(group_desc_bh, "get_write_access"); |
Jan Kara | 188c299 | 2021-08-16 11:57:04 +0200 | [diff] [blame] | 1583 | ret = ext4_journal_get_write_access(handle, sb, group_desc_bh, |
| 1584 | EXT4_JTR_NONE); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1585 | if (ret) |
| 1586 | goto err_out; |
| 1587 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1588 | /* |
| 1589 | * Skip zeroout if the inode table is full. But we set the ZEROED |
| 1590 | * flag anyway, because obviously, when it is full it does not need |
| 1591 | * further zeroing. |
| 1592 | */ |
| 1593 | if (unlikely(num == 0)) |
| 1594 | goto skip_zeroout; |
| 1595 | |
| 1596 | ext4_debug("going to zero out inode table in group %d\n", |
| 1597 | group); |
Theodore Ts'o | a107e5a | 2010-10-27 23:44:47 -0400 | [diff] [blame] | 1598 | ret = sb_issue_zeroout(sb, blk, num, GFP_NOFS); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1599 | if (ret < 0) |
| 1600 | goto err_out; |
Theodore Ts'o | a107e5a | 2010-10-27 23:44:47 -0400 | [diff] [blame] | 1601 | if (barrier) |
Christoph Hellwig | c6bf3f0 | 2021-01-26 15:52:35 +0100 | [diff] [blame] | 1602 | blkdev_issue_flush(sb->s_bdev); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1603 | |
| 1604 | skip_zeroout: |
| 1605 | ext4_lock_group(sb, group); |
| 1606 | gdp->bg_flags |= cpu_to_le16(EXT4_BG_INODE_ZEROED); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 1607 | ext4_group_desc_csum_set(sb, group, gdp); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1608 | ext4_unlock_group(sb, group); |
| 1609 | |
| 1610 | BUFFER_TRACE(group_desc_bh, |
| 1611 | "call ext4_handle_dirty_metadata"); |
| 1612 | ret = ext4_handle_dirty_metadata(handle, NULL, |
| 1613 | group_desc_bh); |
| 1614 | |
| 1615 | err_out: |
| 1616 | up_write(&grp->alloc_sem); |
| 1617 | ext4_journal_stop(handle); |
| 1618 | out: |
| 1619 | return ret; |
| 1620 | } |