Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2 | * linux/fs/ext4/ialloc.c |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 1992, 1993, 1994, 1995 |
| 5 | * Remy Card (card@masi.ibp.fr) |
| 6 | * Laboratoire MASI - Institut Blaise Pascal |
| 7 | * Universite Pierre et Marie Curie (Paris VI) |
| 8 | * |
| 9 | * BSD ufs-inspired inode and directory allocation by |
| 10 | * Stephen Tweedie (sct@redhat.com), 1993 |
| 11 | * Big-endian to little-endian byte-swapping/bitmaps by |
| 12 | * David S. Miller (davem@caip.rutgers.edu), 1995 |
| 13 | */ |
| 14 | |
| 15 | #include <linux/time.h> |
| 16 | #include <linux/fs.h> |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 17 | #include <linux/jbd2.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> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 25 | #include <asm/byteorder.h> |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 26 | |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 27 | #include "ext4.h" |
| 28 | #include "ext4_jbd2.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 29 | #include "xattr.h" |
| 30 | #include "acl.h" |
| 31 | |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 32 | #include <trace/events/ext4.h> |
| 33 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 34 | /* |
| 35 | * ialloc.c contains the inodes allocation and deallocation routines |
| 36 | */ |
| 37 | |
| 38 | /* |
| 39 | * The free inodes are managed by bitmaps. A file system contains several |
| 40 | * blocks groups. Each group contains 1 bitmap block for blocks, 1 bitmap |
| 41 | * block for inodes, N blocks for the inode table and data blocks. |
| 42 | * |
| 43 | * The file system contains group descriptors which are located after the |
| 44 | * super block. Each descriptor contains the number of the bitmap block and |
| 45 | * the free blocks count in the block. |
| 46 | */ |
| 47 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 48 | /* |
| 49 | * To avoid calling the atomic setbit hundreds or thousands of times, we only |
| 50 | * need to use it within a single byte (to ensure we get endianness right). |
| 51 | * We can use memset for the rest of the bitmap as there are no other users. |
| 52 | */ |
Theodore Ts'o | 61d0867 | 2010-10-27 21:30:15 -0400 | [diff] [blame] | 53 | 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] | 54 | { |
| 55 | int i; |
| 56 | |
| 57 | if (start_bit >= end_bit) |
| 58 | return; |
| 59 | |
| 60 | ext4_debug("mark end bits +%d through +%d used\n", start_bit, end_bit); |
| 61 | for (i = start_bit; i < ((start_bit + 7) & ~7UL); i++) |
| 62 | ext4_set_bit(i, bitmap); |
| 63 | if (i < end_bit) |
| 64 | memset(bitmap + (i >> 3), 0xff, (end_bit - i) >> 3); |
| 65 | } |
| 66 | |
| 67 | /* Initializes an uninitialized inode bitmap */ |
Theodore Ts'o | 1f109d5 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 68 | static unsigned ext4_init_inode_bitmap(struct super_block *sb, |
| 69 | struct buffer_head *bh, |
| 70 | ext4_group_t block_group, |
| 71 | struct ext4_group_desc *gdp) |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 72 | { |
Darrick J. Wong | bdfb6ff | 2013-08-28 18:46:56 -0400 | [diff] [blame] | 73 | struct ext4_group_info *grp; |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 74 | J_ASSERT_BH(bh, buffer_locked(bh)); |
| 75 | |
| 76 | /* If checksum is bad mark all blocks and inodes use to prevent |
| 77 | * allocation, essentially implementing a per-group read-only flag. */ |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 78 | if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) { |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 79 | ext4_error(sb, "Checksum bad for group %u", block_group); |
Darrick J. Wong | bdfb6ff | 2013-08-28 18:46:56 -0400 | [diff] [blame] | 80 | grp = ext4_get_group_info(sb, block_group); |
| 81 | set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state); |
| 82 | set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | memset(bh->b_data, 0, (EXT4_INODES_PER_GROUP(sb) + 7) / 8); |
Theodore Ts'o | 61d0867 | 2010-10-27 21:30:15 -0400 | [diff] [blame] | 87 | ext4_mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), sb->s_blocksize * 8, |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 88 | bh->b_data); |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 89 | ext4_inode_bitmap_csum_set(sb, block_group, gdp, bh, |
| 90 | EXT4_INODES_PER_GROUP(sb) / 8); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 91 | ext4_group_desc_csum_set(sb, block_group, gdp); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 92 | |
| 93 | return EXT4_INODES_PER_GROUP(sb); |
| 94 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 95 | |
Theodore Ts'o | 813e572 | 2012-02-20 17:52:46 -0500 | [diff] [blame] | 96 | void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate) |
| 97 | { |
| 98 | if (uptodate) { |
| 99 | set_buffer_uptodate(bh); |
| 100 | set_bitmap_uptodate(bh); |
| 101 | } |
| 102 | unlock_buffer(bh); |
| 103 | put_bh(bh); |
| 104 | } |
| 105 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 106 | /* |
| 107 | * Read the inode allocation bitmap for a given block_group, reading |
| 108 | * into the specified slot in the superblock's bitmap cache. |
| 109 | * |
| 110 | * Return buffer_head of bitmap on success or NULL. |
| 111 | */ |
| 112 | static struct buffer_head * |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 113 | 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] | 114 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 115 | struct ext4_group_desc *desc; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 116 | struct buffer_head *bh = NULL; |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 117 | ext4_fsblk_t bitmap_blk; |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 118 | struct ext4_group_info *grp; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 119 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 120 | desc = ext4_get_group_desc(sb, block_group, NULL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 121 | if (!desc) |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 122 | return NULL; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 123 | |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 124 | bitmap_blk = ext4_inode_bitmap(sb, desc); |
| 125 | bh = sb_getblk(sb, bitmap_blk); |
| 126 | if (unlikely(!bh)) { |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 127 | ext4_error(sb, "Cannot read inode bitmap - " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 128 | "block_group = %u, inode_bitmap = %llu", |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 129 | block_group, bitmap_blk); |
| 130 | return NULL; |
| 131 | } |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 132 | if (bitmap_uptodate(bh)) |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 133 | goto verify; |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 134 | |
Frederic Bohe | c806e68 | 2008-10-10 08:09:18 -0400 | [diff] [blame] | 135 | lock_buffer(bh); |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 136 | if (bitmap_uptodate(bh)) { |
| 137 | unlock_buffer(bh); |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 138 | goto verify; |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 139 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 140 | |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 141 | ext4_lock_group(sb, block_group); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 142 | if (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { |
| 143 | ext4_init_inode_bitmap(sb, bh, block_group, desc); |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 144 | set_bitmap_uptodate(bh); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 145 | set_buffer_uptodate(bh); |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 146 | set_buffer_verified(bh); |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 147 | ext4_unlock_group(sb, block_group); |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 148 | unlock_buffer(bh); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 149 | return bh; |
| 150 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 151 | ext4_unlock_group(sb, block_group); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 152 | |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 153 | if (buffer_uptodate(bh)) { |
| 154 | /* |
| 155 | * if not uninit if bh is uptodate, |
| 156 | * bitmap is also uptodate |
| 157 | */ |
| 158 | set_bitmap_uptodate(bh); |
| 159 | unlock_buffer(bh); |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 160 | goto verify; |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 161 | } |
| 162 | /* |
Theodore Ts'o | 813e572 | 2012-02-20 17:52:46 -0500 | [diff] [blame] | 163 | * submit the buffer_head for reading |
Aneesh Kumar K.V | 2ccb5fb | 2009-01-05 21:49:55 -0500 | [diff] [blame] | 164 | */ |
Jiaying Zhang | 0562e0b | 2011-03-21 21:38:05 -0400 | [diff] [blame] | 165 | trace_ext4_load_inode_bitmap(sb, block_group); |
Theodore Ts'o | 813e572 | 2012-02-20 17:52:46 -0500 | [diff] [blame] | 166 | bh->b_end_io = ext4_end_bitmap_read; |
| 167 | get_bh(bh); |
Theodore Ts'o | 9f20350 | 2013-04-20 15:46:17 -0400 | [diff] [blame] | 168 | submit_bh(READ | REQ_META | REQ_PRIO, bh); |
Theodore Ts'o | 813e572 | 2012-02-20 17:52:46 -0500 | [diff] [blame] | 169 | wait_on_buffer(bh); |
| 170 | if (!buffer_uptodate(bh)) { |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 171 | put_bh(bh); |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 172 | ext4_error(sb, "Cannot read inode bitmap - " |
Theodore Ts'o | 813e572 | 2012-02-20 17:52:46 -0500 | [diff] [blame] | 173 | "block_group = %u, inode_bitmap = %llu", |
| 174 | block_group, bitmap_blk); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 175 | return NULL; |
| 176 | } |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 177 | |
| 178 | verify: |
| 179 | ext4_lock_group(sb, block_group); |
| 180 | if (!buffer_verified(bh) && |
| 181 | !ext4_inode_bitmap_csum_verify(sb, block_group, desc, bh, |
| 182 | EXT4_INODES_PER_GROUP(sb) / 8)) { |
| 183 | ext4_unlock_group(sb, block_group); |
| 184 | put_bh(bh); |
| 185 | ext4_error(sb, "Corrupt inode bitmap - block_group = %u, " |
| 186 | "inode_bitmap = %llu", block_group, bitmap_blk); |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 187 | grp = ext4_get_group_info(sb, block_group); |
| 188 | set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state); |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 189 | return NULL; |
| 190 | } |
| 191 | ext4_unlock_group(sb, block_group); |
| 192 | set_buffer_verified(bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 193 | return bh; |
| 194 | } |
| 195 | |
| 196 | /* |
| 197 | * NOTE! When we get the inode, we're the only people |
| 198 | * that have access to it, and as such there are no |
| 199 | * race conditions we have to worry about. The inode |
| 200 | * is not on the hash-lists, and it cannot be reached |
| 201 | * through the filesystem because the directory entry |
| 202 | * has been deleted earlier. |
| 203 | * |
| 204 | * HOWEVER: we must make sure that we get no aliases, |
| 205 | * which means that we have to call "clear_inode()" |
| 206 | * _before_ we mark the inode not in use in the inode |
| 207 | * bitmaps. Otherwise a newly created file might use |
| 208 | * the same inode number (not actually the same pointer |
| 209 | * though), and then we'd have two inodes sharing the |
| 210 | * same inode number and space on the harddisk. |
| 211 | */ |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 212 | void ext4_free_inode(handle_t *handle, struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 213 | { |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 214 | struct super_block *sb = inode->i_sb; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 215 | int is_directory; |
| 216 | unsigned long ino; |
| 217 | struct buffer_head *bitmap_bh = NULL; |
| 218 | struct buffer_head *bh2; |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 219 | ext4_group_t block_group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 220 | unsigned long bit; |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 221 | struct ext4_group_desc *gdp; |
| 222 | struct ext4_super_block *es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 223 | struct ext4_sb_info *sbi; |
Eric Sandeen | 7ce9d5d | 2009-03-04 18:38:18 -0500 | [diff] [blame] | 224 | int fatal = 0, err, count, cleared; |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 225 | struct ext4_group_info *grp; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 226 | |
Theodore Ts'o | 92b9781 | 2012-03-19 23:41:49 -0400 | [diff] [blame] | 227 | if (!sb) { |
| 228 | printk(KERN_ERR "EXT4-fs: %s:%d: inode on " |
| 229 | "nonexistent device\n", __func__, __LINE__); |
| 230 | return; |
| 231 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 232 | if (atomic_read(&inode->i_count) > 1) { |
Theodore Ts'o | 92b9781 | 2012-03-19 23:41:49 -0400 | [diff] [blame] | 233 | ext4_msg(sb, KERN_ERR, "%s:%d: inode #%lu: count=%d", |
| 234 | __func__, __LINE__, inode->i_ino, |
| 235 | atomic_read(&inode->i_count)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 236 | return; |
| 237 | } |
| 238 | if (inode->i_nlink) { |
Theodore Ts'o | 92b9781 | 2012-03-19 23:41:49 -0400 | [diff] [blame] | 239 | ext4_msg(sb, KERN_ERR, "%s:%d: inode #%lu: nlink=%d\n", |
| 240 | __func__, __LINE__, inode->i_ino, inode->i_nlink); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 241 | return; |
| 242 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 243 | sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 244 | |
| 245 | ino = inode->i_ino; |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 246 | ext4_debug("freeing inode %lu\n", ino); |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 247 | trace_ext4_free_inode(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 248 | |
| 249 | /* |
| 250 | * Note: we must free any quota before locking the superblock, |
| 251 | * as writing the quota to disk may need the lock as well. |
| 252 | */ |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 253 | dquot_initialize(inode); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 254 | ext4_xattr_delete_inode(handle, inode); |
Christoph Hellwig | 63936dd | 2010-03-03 09:05:01 -0500 | [diff] [blame] | 255 | dquot_free_inode(inode); |
Christoph Hellwig | 9f75475 | 2010-03-03 09:05:05 -0500 | [diff] [blame] | 256 | dquot_drop(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 257 | |
| 258 | is_directory = S_ISDIR(inode->i_mode); |
| 259 | |
| 260 | /* 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] | 261 | ext4_clear_inode(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 262 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 263 | es = EXT4_SB(sb)->s_es; |
| 264 | 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] | 265 | ext4_error(sb, "reserved or nonexistent inode %lu", ino); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 266 | goto error_return; |
| 267 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 268 | block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); |
| 269 | bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 270 | bitmap_bh = ext4_read_inode_bitmap(sb, block_group); |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 271 | /* Don't bother if the inode bitmap is corrupt. */ |
| 272 | grp = ext4_get_group_info(sb, block_group); |
| 273 | if (unlikely(EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) || !bitmap_bh) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 274 | goto error_return; |
| 275 | |
| 276 | BUFFER_TRACE(bitmap_bh, "get_write_access"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 277 | fatal = ext4_journal_get_write_access(handle, bitmap_bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 278 | if (fatal) |
| 279 | goto error_return; |
| 280 | |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 281 | fatal = -ESRCH; |
| 282 | gdp = ext4_get_group_desc(sb, block_group, &bh2); |
| 283 | if (gdp) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 284 | BUFFER_TRACE(bh2, "get_write_access"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 285 | fatal = ext4_journal_get_write_access(handle, bh2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 286 | } |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 287 | ext4_lock_group(sb, block_group); |
Akinobu Mita | 597d508 | 2011-12-28 20:32:07 -0500 | [diff] [blame] | 288 | cleared = ext4_test_and_clear_bit(bit, bitmap_bh->b_data); |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 289 | if (fatal || !cleared) { |
| 290 | ext4_unlock_group(sb, block_group); |
| 291 | goto out; |
| 292 | } |
| 293 | |
| 294 | count = ext4_free_inodes_count(sb, gdp) + 1; |
| 295 | ext4_free_inodes_set(sb, gdp, count); |
| 296 | if (is_directory) { |
| 297 | count = ext4_used_dirs_count(sb, gdp) - 1; |
| 298 | ext4_used_dirs_set(sb, gdp, count); |
| 299 | percpu_counter_dec(&sbi->s_dirs_counter); |
| 300 | } |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 301 | ext4_inode_bitmap_csum_set(sb, block_group, gdp, bitmap_bh, |
| 302 | EXT4_INODES_PER_GROUP(sb) / 8); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 303 | ext4_group_desc_csum_set(sb, block_group, gdp); |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 304 | ext4_unlock_group(sb, block_group); |
| 305 | |
| 306 | percpu_counter_inc(&sbi->s_freeinodes_counter); |
| 307 | if (sbi->s_log_groups_per_flex) { |
| 308 | ext4_group_t f = ext4_flex_group(sbi, block_group); |
| 309 | |
| 310 | atomic_inc(&sbi->s_flex_groups[f].free_inodes); |
| 311 | if (is_directory) |
| 312 | atomic_dec(&sbi->s_flex_groups[f].used_dirs); |
| 313 | } |
| 314 | BUFFER_TRACE(bh2, "call ext4_handle_dirty_metadata"); |
| 315 | fatal = ext4_handle_dirty_metadata(handle, NULL, bh2); |
| 316 | out: |
| 317 | if (cleared) { |
| 318 | BUFFER_TRACE(bitmap_bh, "call ext4_handle_dirty_metadata"); |
| 319 | err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh); |
| 320 | if (!fatal) |
| 321 | fatal = err; |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 322 | } else { |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 323 | ext4_error(sb, "bit already cleared for inode %lu", ino); |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 324 | set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state); |
| 325 | } |
Dmitry Monakhov | d17413c | 2010-05-16 07:00:00 -0400 | [diff] [blame] | 326 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 327 | error_return: |
| 328 | brelse(bitmap_bh); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 329 | ext4_std_error(sb, fatal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 330 | } |
| 331 | |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 332 | struct orlov_stats { |
Theodore Ts'o | 90ba983 | 2013-03-11 23:39:59 -0400 | [diff] [blame] | 333 | __u64 free_clusters; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 334 | __u32 free_inodes; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 335 | __u32 used_dirs; |
| 336 | }; |
| 337 | |
| 338 | /* |
| 339 | * Helper function for Orlov's allocator; returns critical information |
| 340 | * for a particular block group or flex_bg. If flex_size is 1, then g |
| 341 | * is a block group number; otherwise it is flex_bg number. |
| 342 | */ |
Theodore Ts'o | 1f109d5 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 343 | static void get_orlov_stats(struct super_block *sb, ext4_group_t g, |
| 344 | int flex_size, struct orlov_stats *stats) |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 345 | { |
| 346 | struct ext4_group_desc *desc; |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 347 | struct flex_groups *flex_group = EXT4_SB(sb)->s_flex_groups; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 348 | |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 349 | if (flex_size > 1) { |
| 350 | stats->free_inodes = atomic_read(&flex_group[g].free_inodes); |
Theodore Ts'o | 90ba983 | 2013-03-11 23:39:59 -0400 | [diff] [blame] | 351 | stats->free_clusters = atomic64_read(&flex_group[g].free_clusters); |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 352 | stats->used_dirs = atomic_read(&flex_group[g].used_dirs); |
| 353 | return; |
| 354 | } |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 355 | |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 356 | desc = ext4_get_group_desc(sb, g, NULL); |
| 357 | if (desc) { |
| 358 | stats->free_inodes = ext4_free_inodes_count(sb, desc); |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 359 | stats->free_clusters = ext4_free_group_clusters(sb, desc); |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 360 | stats->used_dirs = ext4_used_dirs_count(sb, desc); |
| 361 | } else { |
| 362 | stats->free_inodes = 0; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 363 | stats->free_clusters = 0; |
Theodore Ts'o | 7d39db1 | 2009-03-04 19:31:53 -0500 | [diff] [blame] | 364 | stats->used_dirs = 0; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 365 | } |
| 366 | } |
| 367 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 368 | /* |
| 369 | * Orlov's allocator for directories. |
| 370 | * |
| 371 | * We always try to spread first-level directories. |
| 372 | * |
| 373 | * If there are blockgroups with both free inodes and free blocks counts |
| 374 | * not worse than average we return one with smallest directory count. |
| 375 | * Otherwise we simply return a random group. |
| 376 | * |
| 377 | * For the rest rules look so: |
| 378 | * |
| 379 | * It's OK to put directory into a group unless |
| 380 | * it has too many directories already (max_dirs) or |
| 381 | * it has too few free inodes left (min_inodes) or |
| 382 | * it has too few free blocks left (min_blocks) or |
Benoit Boissinot | 1cc8dcf | 2008-04-21 22:45:55 +0000 | [diff] [blame] | 383 | * Parent's group is preferred, if it doesn't satisfy these |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 384 | * conditions we search cyclically through the rest. If none |
| 385 | * of the groups look good we just look for a group with more |
| 386 | * free inodes than average (starting at parent's group). |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 387 | */ |
| 388 | |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 389 | static int find_group_orlov(struct super_block *sb, struct inode *parent, |
Al Viro | dcca3fe | 2011-07-26 02:48:06 -0400 | [diff] [blame] | 390 | ext4_group_t *group, umode_t mode, |
Theodore Ts'o | f157a4a | 2009-06-13 11:09:42 -0400 | [diff] [blame] | 391 | const struct qstr *qstr) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 392 | { |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 393 | ext4_group_t parent_group = EXT4_I(parent)->i_block_group; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 394 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 395 | ext4_group_t real_ngroups = ext4_get_groups_count(sb); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 396 | int inodes_per_group = EXT4_INODES_PER_GROUP(sb); |
Theodore Ts'o | 14c83c9 | 2011-12-28 20:25:13 -0500 | [diff] [blame] | 397 | unsigned int freei, avefreei, grp_free; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 398 | ext4_fsblk_t freeb, avefreec; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 399 | unsigned int ndirs; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 400 | int max_dirs, min_inodes; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 401 | ext4_grpblk_t min_clusters; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 402 | ext4_group_t i, grp, g, ngroups; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 403 | struct ext4_group_desc *desc; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 404 | struct orlov_stats stats; |
| 405 | int flex_size = ext4_flex_bg_size(sbi); |
Theodore Ts'o | f157a4a | 2009-06-13 11:09:42 -0400 | [diff] [blame] | 406 | struct dx_hash_info hinfo; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 407 | |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 408 | ngroups = real_ngroups; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 409 | if (flex_size > 1) { |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 410 | ngroups = (real_ngroups + flex_size - 1) >> |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 411 | sbi->s_log_groups_per_flex; |
| 412 | parent_group >>= sbi->s_log_groups_per_flex; |
| 413 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 414 | |
| 415 | freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter); |
| 416 | avefreei = freei / ngroups; |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 417 | freeb = EXT4_C2B(sbi, |
| 418 | percpu_counter_read_positive(&sbi->s_freeclusters_counter)); |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 419 | avefreec = freeb; |
| 420 | do_div(avefreec, ngroups); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 421 | ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter); |
| 422 | |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 423 | if (S_ISDIR(mode) && |
| 424 | ((parent == sb->s_root->d_inode) || |
Dmitry Monakhov | 12e9b89 | 2010-05-16 22:00:00 -0400 | [diff] [blame] | 425 | (ext4_test_inode_flag(parent, EXT4_INODE_TOPDIR)))) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 426 | int best_ndir = inodes_per_group; |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 427 | int ret = -1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 428 | |
Theodore Ts'o | f157a4a | 2009-06-13 11:09:42 -0400 | [diff] [blame] | 429 | if (qstr) { |
| 430 | hinfo.hash_version = DX_HASH_HALF_MD4; |
| 431 | hinfo.seed = sbi->s_hash_seed; |
| 432 | ext4fs_dirhash(qstr->name, qstr->len, &hinfo); |
| 433 | grp = hinfo.hash; |
| 434 | } else |
Theodore Ts'o | dd1f723 | 2013-11-08 00:14:53 -0500 | [diff] [blame] | 435 | grp = prandom_u32(); |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 436 | parent_group = (unsigned)grp % ngroups; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 437 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 438 | g = (parent_group + i) % ngroups; |
| 439 | get_orlov_stats(sb, g, flex_size, &stats); |
| 440 | if (!stats.free_inodes) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 441 | continue; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 442 | if (stats.used_dirs >= best_ndir) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 443 | continue; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 444 | if (stats.free_inodes < avefreei) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 445 | continue; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 446 | if (stats.free_clusters < avefreec) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 447 | continue; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 448 | grp = g; |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 449 | ret = 0; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 450 | best_ndir = stats.used_dirs; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 451 | } |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 452 | if (ret) |
| 453 | goto fallback; |
| 454 | found_flex_bg: |
| 455 | if (flex_size == 1) { |
| 456 | *group = grp; |
| 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | * We pack inodes at the beginning of the flexgroup's |
| 462 | * inode tables. Block allocation decisions will do |
| 463 | * something similar, although regular files will |
| 464 | * start at 2nd block group of the flexgroup. See |
| 465 | * ext4_ext_find_goal() and ext4_find_near(). |
| 466 | */ |
| 467 | grp *= flex_size; |
| 468 | for (i = 0; i < flex_size; i++) { |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 469 | if (grp+i >= real_ngroups) |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 470 | break; |
| 471 | desc = ext4_get_group_desc(sb, grp+i, NULL); |
| 472 | if (desc && ext4_free_inodes_count(sb, desc)) { |
| 473 | *group = grp+i; |
| 474 | return 0; |
| 475 | } |
| 476 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 477 | goto fallback; |
| 478 | } |
| 479 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 480 | max_dirs = ndirs / ngroups + inodes_per_group / 16; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 481 | min_inodes = avefreei - inodes_per_group*flex_size / 4; |
| 482 | if (min_inodes < 1) |
| 483 | min_inodes = 1; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 484 | min_clusters = avefreec - EXT4_CLUSTERS_PER_GROUP(sb)*flex_size / 4; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 485 | |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 486 | /* |
| 487 | * Start looking in the flex group where we last allocated an |
| 488 | * inode for this parent directory |
| 489 | */ |
| 490 | if (EXT4_I(parent)->i_last_alloc_group != ~0) { |
| 491 | parent_group = EXT4_I(parent)->i_last_alloc_group; |
| 492 | if (flex_size > 1) |
| 493 | parent_group >>= sbi->s_log_groups_per_flex; |
| 494 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 495 | |
| 496 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 497 | grp = (parent_group + i) % ngroups; |
| 498 | get_orlov_stats(sb, grp, flex_size, &stats); |
| 499 | if (stats.used_dirs >= max_dirs) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 500 | continue; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 501 | if (stats.free_inodes < min_inodes) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 502 | continue; |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 503 | if (stats.free_clusters < min_clusters) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 504 | continue; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 505 | goto found_flex_bg; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | fallback: |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 509 | ngroups = real_ngroups; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 510 | avefreei = freei / ngroups; |
Theodore Ts'o | b5451f7 | 2009-04-22 21:00:36 -0400 | [diff] [blame] | 511 | fallback_retry: |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 512 | parent_group = EXT4_I(parent)->i_block_group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 513 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 514 | grp = (parent_group + i) % ngroups; |
| 515 | desc = ext4_get_group_desc(sb, grp, NULL); |
Dan Carpenter | bb3d132 | 2012-05-28 14:16:57 -0400 | [diff] [blame] | 516 | if (desc) { |
| 517 | grp_free = ext4_free_inodes_count(sb, desc); |
| 518 | if (grp_free && grp_free >= avefreei) { |
| 519 | *group = grp; |
| 520 | return 0; |
| 521 | } |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 522 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 523 | } |
| 524 | |
| 525 | if (avefreei) { |
| 526 | /* |
| 527 | * The free-inodes counter is approximate, and for really small |
| 528 | * filesystems the above test can fail to find any blockgroups |
| 529 | */ |
| 530 | avefreei = 0; |
Theodore Ts'o | b5451f7 | 2009-04-22 21:00:36 -0400 | [diff] [blame] | 531 | goto fallback_retry; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 532 | } |
| 533 | |
| 534 | return -1; |
| 535 | } |
| 536 | |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 537 | static int find_group_other(struct super_block *sb, struct inode *parent, |
Al Viro | dcca3fe | 2011-07-26 02:48:06 -0400 | [diff] [blame] | 538 | ext4_group_t *group, umode_t mode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 539 | { |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 540 | ext4_group_t parent_group = EXT4_I(parent)->i_block_group; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 541 | ext4_group_t i, last, ngroups = ext4_get_groups_count(sb); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 542 | struct ext4_group_desc *desc; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 543 | int flex_size = ext4_flex_bg_size(EXT4_SB(sb)); |
| 544 | |
| 545 | /* |
| 546 | * Try to place the inode is the same flex group as its |
| 547 | * parent. If we can't find space, use the Orlov algorithm to |
| 548 | * find another flex group, and store that information in the |
| 549 | * parent directory's inode information so that use that flex |
| 550 | * group for future allocations. |
| 551 | */ |
| 552 | if (flex_size > 1) { |
| 553 | int retry = 0; |
| 554 | |
| 555 | try_again: |
| 556 | parent_group &= ~(flex_size-1); |
| 557 | last = parent_group + flex_size; |
| 558 | if (last > ngroups) |
| 559 | last = ngroups; |
| 560 | for (i = parent_group; i < last; i++) { |
| 561 | desc = ext4_get_group_desc(sb, i, NULL); |
| 562 | if (desc && ext4_free_inodes_count(sb, desc)) { |
| 563 | *group = i; |
| 564 | return 0; |
| 565 | } |
| 566 | } |
| 567 | if (!retry && EXT4_I(parent)->i_last_alloc_group != ~0) { |
| 568 | retry = 1; |
| 569 | parent_group = EXT4_I(parent)->i_last_alloc_group; |
| 570 | goto try_again; |
| 571 | } |
| 572 | /* |
| 573 | * If this didn't work, use the Orlov search algorithm |
| 574 | * to find a new flex group; we pass in the mode to |
| 575 | * avoid the topdir algorithms. |
| 576 | */ |
| 577 | *group = parent_group + flex_size; |
| 578 | if (*group > ngroups) |
| 579 | *group = 0; |
Peter Huewe | 7dc5761 | 2011-02-21 21:01:42 -0500 | [diff] [blame] | 580 | return find_group_orlov(sb, parent, group, mode, NULL); |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 581 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 582 | |
| 583 | /* |
| 584 | * Try to place the inode in its parent directory |
| 585 | */ |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 586 | *group = parent_group; |
| 587 | desc = ext4_get_group_desc(sb, *group, NULL); |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 588 | if (desc && ext4_free_inodes_count(sb, desc) && |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 589 | ext4_free_group_clusters(sb, desc)) |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 590 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 591 | |
| 592 | /* |
| 593 | * We're going to place this inode in a different blockgroup from its |
| 594 | * parent. We want to cause files in a common directory to all land in |
| 595 | * the same blockgroup. But we want files which are in a different |
| 596 | * directory which shares a blockgroup with our parent to land in a |
| 597 | * different blockgroup. |
| 598 | * |
| 599 | * So add our directory's i_ino into the starting point for the hash. |
| 600 | */ |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 601 | *group = (*group + parent->i_ino) % ngroups; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 602 | |
| 603 | /* |
| 604 | * Use a quadratic hash to find a group with a free inode and some free |
| 605 | * blocks. |
| 606 | */ |
| 607 | for (i = 1; i < ngroups; i <<= 1) { |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 608 | *group += i; |
| 609 | if (*group >= ngroups) |
| 610 | *group -= ngroups; |
| 611 | desc = ext4_get_group_desc(sb, *group, NULL); |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 612 | if (desc && ext4_free_inodes_count(sb, desc) && |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 613 | ext4_free_group_clusters(sb, desc)) |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 614 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | /* |
| 618 | * That failed: try linear search for a free inode, even if that group |
| 619 | * has no free blocks. |
| 620 | */ |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 621 | *group = parent_group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 622 | for (i = 0; i < ngroups; i++) { |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 623 | if (++*group >= ngroups) |
| 624 | *group = 0; |
| 625 | desc = ext4_get_group_desc(sb, *group, NULL); |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 626 | if (desc && ext4_free_inodes_count(sb, desc)) |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 627 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 628 | } |
| 629 | |
| 630 | return -1; |
| 631 | } |
| 632 | |
| 633 | /* |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 634 | * In no journal mode, if an inode has recently been deleted, we want |
| 635 | * to avoid reusing it until we're reasonably sure the inode table |
| 636 | * block has been written back to disk. (Yes, these values are |
| 637 | * somewhat arbitrary...) |
| 638 | */ |
| 639 | #define RECENTCY_MIN 5 |
| 640 | #define RECENTCY_DIRTY 30 |
| 641 | |
| 642 | static int recently_deleted(struct super_block *sb, ext4_group_t group, int ino) |
| 643 | { |
| 644 | struct ext4_group_desc *gdp; |
| 645 | struct ext4_inode *raw_inode; |
| 646 | struct buffer_head *bh; |
| 647 | unsigned long dtime, now; |
| 648 | int inodes_per_block = EXT4_SB(sb)->s_inodes_per_block; |
| 649 | int offset, ret = 0, recentcy = RECENTCY_MIN; |
| 650 | |
| 651 | gdp = ext4_get_group_desc(sb, group, NULL); |
| 652 | if (unlikely(!gdp)) |
| 653 | return 0; |
| 654 | |
| 655 | bh = sb_getblk(sb, ext4_inode_table(sb, gdp) + |
| 656 | (ino / inodes_per_block)); |
| 657 | if (unlikely(!bh) || !buffer_uptodate(bh)) |
| 658 | /* |
| 659 | * If the block is not in the buffer cache, then it |
| 660 | * must have been written out. |
| 661 | */ |
| 662 | goto out; |
| 663 | |
| 664 | offset = (ino % inodes_per_block) * EXT4_INODE_SIZE(sb); |
| 665 | raw_inode = (struct ext4_inode *) (bh->b_data + offset); |
| 666 | dtime = le32_to_cpu(raw_inode->i_dtime); |
| 667 | now = get_seconds(); |
| 668 | if (buffer_dirty(bh)) |
| 669 | recentcy += RECENTCY_DIRTY; |
| 670 | |
| 671 | if (dtime && (dtime < now) && (now < dtime + recentcy)) |
| 672 | ret = 1; |
| 673 | out: |
| 674 | brelse(bh); |
| 675 | return ret; |
| 676 | } |
| 677 | |
| 678 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 679 | * There are two policies for allocating an inode. If the new inode is |
| 680 | * a directory, then a forward search is made for a block group with both |
| 681 | * free space and a low directory-to-inode ratio; if that fails, then of |
| 682 | * the groups with above-average free space, that group with the fewest |
| 683 | * directories already is chosen. |
| 684 | * |
| 685 | * For other inodes, search forward from the parent directory's block |
| 686 | * group to find a free inode. |
| 687 | */ |
Theodore Ts'o | 1139575 | 2013-02-09 16:27:09 -0500 | [diff] [blame] | 688 | struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, |
| 689 | umode_t mode, const struct qstr *qstr, |
| 690 | __u32 goal, uid_t *owner, int handle_type, |
| 691 | unsigned int line_no, int nblocks) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 692 | { |
| 693 | struct super_block *sb; |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 694 | struct buffer_head *inode_bitmap_bh = NULL; |
| 695 | struct buffer_head *group_desc_bh; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 696 | ext4_group_t ngroups, group = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 697 | unsigned long ino = 0; |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 698 | struct inode *inode; |
| 699 | struct ext4_group_desc *gdp = NULL; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 700 | struct ext4_inode_info *ei; |
| 701 | struct ext4_sb_info *sbi; |
Aneesh Kumar K.V | 3934186 | 2009-01-05 21:38:14 -0500 | [diff] [blame] | 702 | int ret2, err = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 703 | struct inode *ret; |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 704 | ext4_group_t i; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 705 | ext4_group_t flex_group; |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 706 | struct ext4_group_info *grp; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 707 | |
| 708 | /* Cannot create files in a deleted directory */ |
| 709 | if (!dir || !dir->i_nlink) |
| 710 | return ERR_PTR(-EPERM); |
| 711 | |
| 712 | sb = dir->i_sb; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 713 | ngroups = ext4_get_groups_count(sb); |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 714 | trace_ext4_request_inode(dir, mode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 715 | inode = new_inode(sb); |
| 716 | if (!inode) |
| 717 | return ERR_PTR(-ENOMEM); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 718 | ei = EXT4_I(inode); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 719 | sbi = EXT4_SB(sb); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 720 | |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 721 | /* |
| 722 | * Initalize owners and quota early so that we don't have to account |
| 723 | * for quota initialization worst case in standard inode creating |
| 724 | * transaction |
| 725 | */ |
| 726 | if (owner) { |
| 727 | inode->i_mode = mode; |
| 728 | i_uid_write(inode, owner[0]); |
| 729 | i_gid_write(inode, owner[1]); |
| 730 | } else if (test_opt(sb, GRPID)) { |
| 731 | inode->i_mode = mode; |
| 732 | inode->i_uid = current_fsuid(); |
| 733 | inode->i_gid = dir->i_gid; |
| 734 | } else |
| 735 | inode_init_owner(inode, dir, mode); |
| 736 | dquot_initialize(inode); |
| 737 | |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 738 | if (!goal) |
| 739 | goal = sbi->s_inode_goal; |
| 740 | |
Johann Lombardi | e646286 | 2009-07-05 23:45:11 -0400 | [diff] [blame] | 741 | if (goal && goal <= le32_to_cpu(sbi->s_es->s_inodes_count)) { |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 742 | group = (goal - 1) / EXT4_INODES_PER_GROUP(sb); |
| 743 | ino = (goal - 1) % EXT4_INODES_PER_GROUP(sb); |
| 744 | ret2 = 0; |
| 745 | goto got_group; |
| 746 | } |
| 747 | |
Lukas Czerner | 4113c4c | 2011-10-08 14:34:47 -0400 | [diff] [blame] | 748 | if (S_ISDIR(mode)) |
| 749 | ret2 = find_group_orlov(sb, dir, &group, mode, qstr); |
| 750 | else |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 751 | ret2 = find_group_other(sb, dir, &group, mode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 752 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 753 | got_group: |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 754 | EXT4_I(dir)->i_last_alloc_group = group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 755 | err = -ENOSPC; |
Avantika Mathur | 2aa9fc4 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 756 | if (ret2 == -1) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 757 | goto out; |
| 758 | |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 759 | /* |
| 760 | * Normally we will only go through one pass of this loop, |
| 761 | * unless we get unlucky and it turns out the group we selected |
| 762 | * had its last inode grabbed by someone else. |
| 763 | */ |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 764 | for (i = 0; i < ngroups; i++, ino = 0) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 765 | err = -EIO; |
| 766 | |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 767 | gdp = ext4_get_group_desc(sb, group, &group_desc_bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 768 | if (!gdp) |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 769 | goto out; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 770 | |
Yongqiang Yang | f2a09af | 2012-09-23 23:16:03 -0400 | [diff] [blame] | 771 | /* |
| 772 | * Check free inodes count before loading bitmap. |
| 773 | */ |
| 774 | if (ext4_free_inodes_count(sb, gdp) == 0) { |
| 775 | if (++group == ngroups) |
| 776 | group = 0; |
| 777 | continue; |
| 778 | } |
| 779 | |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 780 | grp = ext4_get_group_info(sb, group); |
| 781 | /* Skip groups with already-known suspicious inode tables */ |
| 782 | if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { |
| 783 | if (++group == ngroups) |
| 784 | group = 0; |
| 785 | continue; |
| 786 | } |
| 787 | |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 788 | brelse(inode_bitmap_bh); |
| 789 | inode_bitmap_bh = ext4_read_inode_bitmap(sb, group); |
Darrick J. Wong | 87a3938 | 2013-08-28 18:32:58 -0400 | [diff] [blame] | 790 | /* Skip groups with suspicious inode tables */ |
| 791 | if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp) || !inode_bitmap_bh) { |
| 792 | if (++group == ngroups) |
| 793 | group = 0; |
| 794 | continue; |
| 795 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 796 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 797 | repeat_in_this_group: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 798 | ino = ext4_find_next_zero_bit((unsigned long *) |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 799 | inode_bitmap_bh->b_data, |
| 800 | EXT4_INODES_PER_GROUP(sb), ino); |
Theodore Ts'o | a34eb50 | 2013-07-26 15:15:46 -0400 | [diff] [blame] | 801 | if (ino >= EXT4_INODES_PER_GROUP(sb)) |
| 802 | goto next_group; |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 803 | if (group == 0 && (ino+1) < EXT4_FIRST_INO(sb)) { |
| 804 | ext4_error(sb, "reserved inode found cleared - " |
| 805 | "inode=%lu", ino + 1); |
| 806 | continue; |
| 807 | } |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 808 | if ((EXT4_SB(sb)->s_journal == NULL) && |
| 809 | recently_deleted(sb, group, ino)) { |
| 810 | ino++; |
| 811 | goto next_inode; |
| 812 | } |
Theodore Ts'o | 1139575 | 2013-02-09 16:27:09 -0500 | [diff] [blame] | 813 | if (!handle) { |
| 814 | BUG_ON(nblocks <= 0); |
| 815 | handle = __ext4_journal_start_sb(dir->i_sb, line_no, |
Jan Kara | 5fe2fe8 | 2013-06-04 12:37:50 -0400 | [diff] [blame] | 816 | handle_type, nblocks, |
| 817 | 0); |
Theodore Ts'o | 1139575 | 2013-02-09 16:27:09 -0500 | [diff] [blame] | 818 | if (IS_ERR(handle)) { |
| 819 | err = PTR_ERR(handle); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 820 | ext4_std_error(sb, err); |
| 821 | goto out; |
Theodore Ts'o | 1139575 | 2013-02-09 16:27:09 -0500 | [diff] [blame] | 822 | } |
| 823 | } |
Eric Sandeen | ffb5387 | 2012-10-28 22:24:57 -0400 | [diff] [blame] | 824 | BUFFER_TRACE(inode_bitmap_bh, "get_write_access"); |
| 825 | err = ext4_journal_get_write_access(handle, inode_bitmap_bh); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 826 | if (err) { |
| 827 | ext4_std_error(sb, err); |
| 828 | goto out; |
| 829 | } |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 830 | ext4_lock_group(sb, group); |
| 831 | ret2 = ext4_test_and_set_bit(ino, inode_bitmap_bh->b_data); |
| 832 | ext4_unlock_group(sb, group); |
| 833 | ino++; /* the inode bitmap is zero-based */ |
| 834 | if (!ret2) |
| 835 | goto got; /* we grabbed the inode! */ |
Theodore Ts'o | 19883bd | 2013-08-16 22:06:55 -0400 | [diff] [blame] | 836 | next_inode: |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 837 | if (ino < EXT4_INODES_PER_GROUP(sb)) |
| 838 | goto repeat_in_this_group; |
Theodore Ts'o | a34eb50 | 2013-07-26 15:15:46 -0400 | [diff] [blame] | 839 | next_group: |
| 840 | if (++group == ngroups) |
| 841 | group = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 842 | } |
| 843 | err = -ENOSPC; |
| 844 | goto out; |
| 845 | |
| 846 | got: |
Eric Sandeen | ffb5387 | 2012-10-28 22:24:57 -0400 | [diff] [blame] | 847 | BUFFER_TRACE(inode_bitmap_bh, "call ext4_handle_dirty_metadata"); |
| 848 | err = ext4_handle_dirty_metadata(handle, NULL, inode_bitmap_bh); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 849 | if (err) { |
| 850 | ext4_std_error(sb, err); |
| 851 | goto out; |
| 852 | } |
Eric Sandeen | ffb5387 | 2012-10-28 22:24:57 -0400 | [diff] [blame] | 853 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 854 | /* 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] | 855 | if (ext4_has_group_desc_csum(sb) && |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 856 | gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 857 | struct buffer_head *block_bitmap_bh; |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 858 | |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 859 | block_bitmap_bh = ext4_read_block_bitmap(sb, group); |
| 860 | BUFFER_TRACE(block_bitmap_bh, "get block bitmap access"); |
| 861 | err = ext4_journal_get_write_access(handle, block_bitmap_bh); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 862 | if (err) { |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 863 | brelse(block_bitmap_bh); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 864 | ext4_std_error(sb, err); |
| 865 | goto out; |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 866 | } |
| 867 | |
Theodore Ts'o | fd034a8 | 2011-09-09 18:42:51 -0400 | [diff] [blame] | 868 | BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap"); |
| 869 | err = ext4_handle_dirty_metadata(handle, NULL, block_bitmap_bh); |
Theodore Ts'o | fd034a8 | 2011-09-09 18:42:51 -0400 | [diff] [blame] | 870 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 871 | /* recheck and clear flag under lock if we still need to */ |
Theodore Ts'o | fd034a8 | 2011-09-09 18:42:51 -0400 | [diff] [blame] | 872 | ext4_lock_group(sb, group); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 873 | if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 874 | gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT); |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 875 | ext4_free_group_clusters_set(sb, gdp, |
Theodore Ts'o | cff1dfd7 | 2011-09-09 19:12:51 -0400 | [diff] [blame] | 876 | ext4_free_clusters_after_init(sb, group, gdp)); |
Darrick J. Wong | fa77dcf | 2012-04-29 18:35:10 -0400 | [diff] [blame] | 877 | ext4_block_bitmap_csum_set(sb, group, gdp, |
Tao Ma | 79f1ba4 | 2012-10-22 00:34:32 -0400 | [diff] [blame] | 878 | block_bitmap_bh); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 879 | ext4_group_desc_csum_set(sb, group, gdp); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 880 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 881 | ext4_unlock_group(sb, group); |
Theodore Ts'o | aeb1e5d6 | 2012-11-29 21:21:22 -0500 | [diff] [blame] | 882 | brelse(block_bitmap_bh); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 883 | |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 884 | if (err) { |
| 885 | ext4_std_error(sb, err); |
| 886 | goto out; |
| 887 | } |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 888 | } |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 889 | |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 890 | BUFFER_TRACE(group_desc_bh, "get_write_access"); |
| 891 | err = ext4_journal_get_write_access(handle, group_desc_bh); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 892 | if (err) { |
| 893 | ext4_std_error(sb, err); |
| 894 | goto out; |
| 895 | } |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 896 | |
| 897 | /* Update the relevant bg descriptor fields */ |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 898 | if (ext4_has_group_desc_csum(sb)) { |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 899 | int free; |
| 900 | struct ext4_group_info *grp = ext4_get_group_info(sb, group); |
| 901 | |
| 902 | down_read(&grp->alloc_sem); /* protect vs itable lazyinit */ |
| 903 | ext4_lock_group(sb, group); /* while we modify the bg desc */ |
| 904 | free = EXT4_INODES_PER_GROUP(sb) - |
| 905 | ext4_itable_unused_count(sb, gdp); |
| 906 | if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { |
| 907 | gdp->bg_flags &= cpu_to_le16(~EXT4_BG_INODE_UNINIT); |
| 908 | free = 0; |
| 909 | } |
| 910 | /* |
| 911 | * Check the relative inode number against the last used |
| 912 | * relative inode number in this group. if it is greater |
| 913 | * we need to update the bg_itable_unused count |
| 914 | */ |
| 915 | if (ino > free) |
| 916 | ext4_itable_unused_set(sb, gdp, |
| 917 | (EXT4_INODES_PER_GROUP(sb) - ino)); |
| 918 | up_read(&grp->alloc_sem); |
Tao Ma | 6f2e9f0 | 2012-05-28 18:20:59 -0400 | [diff] [blame] | 919 | } else { |
| 920 | ext4_lock_group(sb, group); |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 921 | } |
Tao Ma | 6f2e9f0 | 2012-05-28 18:20:59 -0400 | [diff] [blame] | 922 | |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 923 | ext4_free_inodes_set(sb, gdp, ext4_free_inodes_count(sb, gdp) - 1); |
| 924 | if (S_ISDIR(mode)) { |
| 925 | ext4_used_dirs_set(sb, gdp, ext4_used_dirs_count(sb, gdp) + 1); |
| 926 | if (sbi->s_log_groups_per_flex) { |
| 927 | ext4_group_t f = ext4_flex_group(sbi, group); |
| 928 | |
| 929 | atomic_inc(&sbi->s_flex_groups[f].used_dirs); |
| 930 | } |
| 931 | } |
Darrick J. Wong | 41a246d | 2012-04-29 18:33:10 -0400 | [diff] [blame] | 932 | if (ext4_has_group_desc_csum(sb)) { |
| 933 | ext4_inode_bitmap_csum_set(sb, group, gdp, inode_bitmap_bh, |
| 934 | EXT4_INODES_PER_GROUP(sb) / 8); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 935 | ext4_group_desc_csum_set(sb, group, gdp); |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 936 | } |
Tao Ma | 6f2e9f0 | 2012-05-28 18:20:59 -0400 | [diff] [blame] | 937 | ext4_unlock_group(sb, group); |
Theodore Ts'o | 119c0d4 | 2012-02-06 20:12:03 -0500 | [diff] [blame] | 938 | |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 939 | BUFFER_TRACE(group_desc_bh, "call ext4_handle_dirty_metadata"); |
| 940 | err = ext4_handle_dirty_metadata(handle, NULL, group_desc_bh); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 941 | if (err) { |
| 942 | ext4_std_error(sb, err); |
| 943 | goto out; |
| 944 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 945 | |
| 946 | percpu_counter_dec(&sbi->s_freeinodes_counter); |
| 947 | if (S_ISDIR(mode)) |
| 948 | percpu_counter_inc(&sbi->s_dirs_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 949 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 950 | if (sbi->s_log_groups_per_flex) { |
| 951 | flex_group = ext4_flex_group(sbi, group); |
Theodore Ts'o | 9f24e42 | 2009-03-04 19:09:10 -0500 | [diff] [blame] | 952 | atomic_dec(&sbi->s_flex_groups[flex_group].free_inodes); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 953 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 954 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 955 | inode->i_ino = ino + group * EXT4_INODES_PER_GROUP(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 956 | /* This is the optimal IO size (for stat), not the fs block size */ |
| 957 | inode->i_blocks = 0; |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 958 | inode->i_mtime = inode->i_atime = inode->i_ctime = ei->i_crtime = |
| 959 | ext4_current_time(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 960 | |
| 961 | memset(ei->i_data, 0, sizeof(ei->i_data)); |
| 962 | ei->i_dir_start_lookup = 0; |
| 963 | ei->i_disksize = 0; |
| 964 | |
Eryu Guan | 4af8350 | 2011-10-31 18:21:29 -0400 | [diff] [blame] | 965 | /* Don't inherit extent flag from directory, amongst others. */ |
Duane Griffin | 2dc6b0d | 2009-02-15 18:09:20 -0500 | [diff] [blame] | 966 | ei->i_flags = |
| 967 | ext4_mask_flags(mode, EXT4_I(dir)->i_flags & EXT4_FL_INHERITED); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 968 | ei->i_file_acl = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 969 | ei->i_dtime = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 970 | ei->i_block_group = group; |
Theodore Ts'o | a491212 | 2009-03-12 12:18:34 -0400 | [diff] [blame] | 971 | ei->i_last_alloc_group = ~0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 972 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 973 | ext4_set_inode_flags(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 974 | if (IS_DIRSYNC(inode)) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 975 | ext4_handle_sync(handle); |
Al Viro | 6b38e84 | 2008-12-30 02:03:31 -0500 | [diff] [blame] | 976 | if (insert_inode_locked(inode) < 0) { |
Jan Kara | acd6ad8 | 2011-12-18 17:37:02 -0500 | [diff] [blame] | 977 | /* |
| 978 | * Likely a bitmap corruption causing inode to be allocated |
| 979 | * twice. |
| 980 | */ |
| 981 | err = -EIO; |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 982 | ext4_error(sb, "failed to insert inode %lu: doubly allocated?", |
| 983 | inode->i_ino); |
| 984 | goto out; |
Al Viro | 6b38e84 | 2008-12-30 02:03:31 -0500 | [diff] [blame] | 985 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 986 | spin_lock(&sbi->s_next_gen_lock); |
| 987 | inode->i_generation = sbi->s_next_generation++; |
| 988 | spin_unlock(&sbi->s_next_gen_lock); |
| 989 | |
Darrick J. Wong | 814525f | 2012-04-29 18:31:10 -0400 | [diff] [blame] | 990 | /* Precompute checksum seed for inode metadata */ |
| 991 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 992 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { |
| 993 | __u32 csum; |
Darrick J. Wong | 814525f | 2012-04-29 18:31:10 -0400 | [diff] [blame] | 994 | __le32 inum = cpu_to_le32(inode->i_ino); |
| 995 | __le32 gen = cpu_to_le32(inode->i_generation); |
| 996 | csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, |
| 997 | sizeof(inum)); |
| 998 | ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, |
| 999 | sizeof(gen)); |
| 1000 | } |
| 1001 | |
Theodore Ts'o | 353eb83 | 2011-01-10 12:18:25 -0500 | [diff] [blame] | 1002 | ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */ |
Theodore Ts'o | 19f5fb7 | 2010-01-24 14:34:07 -0500 | [diff] [blame] | 1003 | ext4_set_inode_state(inode, EXT4_STATE_NEW); |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 1004 | |
| 1005 | ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1006 | |
Tao Ma | f08225d | 2012-12-10 14:06:03 -0500 | [diff] [blame] | 1007 | ei->i_inline_off = 0; |
| 1008 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_INLINE_DATA)) |
| 1009 | ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); |
| 1010 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1011 | ret = inode; |
Christoph Hellwig | 63936dd | 2010-03-03 09:05:01 -0500 | [diff] [blame] | 1012 | err = dquot_alloc_inode(inode); |
| 1013 | if (err) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1014 | goto fail_drop; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1015 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1016 | err = ext4_init_acl(handle, inode, dir); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1017 | if (err) |
| 1018 | goto fail_free_drop; |
| 1019 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 1020 | err = ext4_init_security(handle, inode, dir, qstr); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1021 | if (err) |
| 1022 | goto fail_free_drop; |
| 1023 | |
Theodore Ts'o | 83982b6 | 2009-01-06 14:53:16 -0500 | [diff] [blame] | 1024 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { |
Eric Sandeen | e4079a1 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1025 | /* set extent flag only for directory, file and normal symlink*/ |
Aneesh Kumar K.V | e65187e | 2008-04-29 08:11:12 -0400 | [diff] [blame] | 1026 | if (S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) { |
Dmitry Monakhov | 12e9b89 | 2010-05-16 22:00:00 -0400 | [diff] [blame] | 1027 | ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS); |
Aneesh Kumar K.V | 42bf038 | 2008-02-25 16:38:03 -0500 | [diff] [blame] | 1028 | ext4_ext_tree_init(handle, inode); |
Aneesh Kumar K.V | 42bf038 | 2008-02-25 16:38:03 -0500 | [diff] [blame] | 1029 | } |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 1030 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1031 | |
Theodore Ts'o | 688f869 | 2011-03-16 17:16:31 -0400 | [diff] [blame] | 1032 | if (ext4_handle_valid(handle)) { |
| 1033 | ei->i_sync_tid = handle->h_transaction->t_tid; |
| 1034 | ei->i_datasync_tid = handle->h_transaction->t_tid; |
| 1035 | } |
| 1036 | |
Aneesh Kumar K.V | 8753e88 | 2008-04-29 22:00:36 -0400 | [diff] [blame] | 1037 | err = ext4_mark_inode_dirty(handle, inode); |
| 1038 | if (err) { |
| 1039 | ext4_std_error(sb, err); |
| 1040 | goto fail_free_drop; |
| 1041 | } |
| 1042 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1043 | ext4_debug("allocating inode %lu\n", inode->i_ino); |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 1044 | trace_ext4_allocate_inode(inode, dir, mode); |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1045 | brelse(inode_bitmap_bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1046 | return ret; |
| 1047 | |
| 1048 | fail_free_drop: |
Christoph Hellwig | 63936dd | 2010-03-03 09:05:01 -0500 | [diff] [blame] | 1049 | dquot_free_inode(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1050 | fail_drop: |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 1051 | clear_nlink(inode); |
Al Viro | 6b38e84 | 2008-12-30 02:03:31 -0500 | [diff] [blame] | 1052 | unlock_new_inode(inode); |
Jan Kara | eb9cc7e | 2013-04-19 13:38:14 -0400 | [diff] [blame] | 1053 | out: |
| 1054 | dquot_drop(inode); |
| 1055 | inode->i_flags |= S_NOQUOTA; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1056 | iput(inode); |
Aneesh Kumar K.V | 3300bed | 2009-01-03 22:33:39 -0500 | [diff] [blame] | 1057 | brelse(inode_bitmap_bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1058 | return ERR_PTR(err); |
| 1059 | } |
| 1060 | |
| 1061 | /* Verify that we are loading a valid orphan from disk */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1062 | struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1063 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1064 | 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] | 1065 | ext4_group_t block_group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1066 | int bit; |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1067 | struct buffer_head *bitmap_bh; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1068 | struct inode *inode = NULL; |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1069 | long err = -EIO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1070 | |
| 1071 | /* Error cases - e2fsck has already cleaned up for us */ |
| 1072 | if (ino > max_ino) { |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 1073 | ext4_warning(sb, "bad orphan ino %lu! e2fsck was run?", ino); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1074 | goto error; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1075 | } |
| 1076 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1077 | block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); |
| 1078 | bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 1079 | bitmap_bh = ext4_read_inode_bitmap(sb, block_group); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1080 | if (!bitmap_bh) { |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 1081 | ext4_warning(sb, "inode bitmap error for orphan %lu", ino); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1082 | goto error; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1083 | } |
| 1084 | |
| 1085 | /* Having the inode bit set should be a 100% indicator that this |
| 1086 | * is a valid orphan (no e2fsck run on fs). Orphans also include |
| 1087 | * inodes that were being truncated, so we can't check i_nlink==0. |
| 1088 | */ |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1089 | if (!ext4_test_bit(bit, bitmap_bh->b_data)) |
| 1090 | goto bad_orphan; |
| 1091 | |
| 1092 | inode = ext4_iget(sb, ino); |
| 1093 | if (IS_ERR(inode)) |
| 1094 | goto iget_failed; |
| 1095 | |
Duane Griffin | 91ef4ca | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1096 | /* |
| 1097 | * If the orphans has i_nlinks > 0 then it should be able to be |
| 1098 | * truncated, otherwise it won't be removed from the orphan list |
| 1099 | * during processing and an infinite loop will result. |
| 1100 | */ |
| 1101 | if (inode->i_nlink && !ext4_can_truncate(inode)) |
| 1102 | goto bad_orphan; |
| 1103 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1104 | if (NEXT_ORPHAN(inode) > max_ino) |
| 1105 | goto bad_orphan; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1106 | brelse(bitmap_bh); |
| 1107 | return inode; |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1108 | |
| 1109 | iget_failed: |
| 1110 | err = PTR_ERR(inode); |
| 1111 | inode = NULL; |
| 1112 | bad_orphan: |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 1113 | ext4_warning(sb, "bad orphan inode %lu! e2fsck was run?", ino); |
Theodore Ts'o | 8de5c32 | 2013-02-14 15:11:41 -0500 | [diff] [blame] | 1114 | printk(KERN_WARNING "ext4_test_bit(bit=%d, block=%llu) = %d\n", |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1115 | bit, (unsigned long long)bitmap_bh->b_blocknr, |
| 1116 | ext4_test_bit(bit, bitmap_bh->b_data)); |
Theodore Ts'o | 8de5c32 | 2013-02-14 15:11:41 -0500 | [diff] [blame] | 1117 | printk(KERN_WARNING "inode=%p\n", inode); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1118 | if (inode) { |
Theodore Ts'o | 8de5c32 | 2013-02-14 15:11:41 -0500 | [diff] [blame] | 1119 | printk(KERN_WARNING "is_bad_inode(inode)=%d\n", |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1120 | is_bad_inode(inode)); |
Theodore Ts'o | 8de5c32 | 2013-02-14 15:11:41 -0500 | [diff] [blame] | 1121 | printk(KERN_WARNING "NEXT_ORPHAN(inode)=%u\n", |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1122 | NEXT_ORPHAN(inode)); |
Theodore Ts'o | 8de5c32 | 2013-02-14 15:11:41 -0500 | [diff] [blame] | 1123 | printk(KERN_WARNING "max_ino=%lu\n", max_ino); |
| 1124 | printk(KERN_WARNING "i_nlink=%u\n", inode->i_nlink); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1125 | /* Avoid freeing blocks if we got a bad deleted inode */ |
| 1126 | if (inode->i_nlink == 0) |
| 1127 | inode->i_blocks = 0; |
| 1128 | iput(inode); |
| 1129 | } |
| 1130 | brelse(bitmap_bh); |
| 1131 | error: |
| 1132 | return ERR_PTR(err); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1133 | } |
| 1134 | |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1135 | unsigned long ext4_count_free_inodes(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1136 | { |
| 1137 | unsigned long desc_count; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1138 | struct ext4_group_desc *gdp; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 1139 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1140 | #ifdef EXT4FS_DEBUG |
| 1141 | struct ext4_super_block *es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1142 | unsigned long bitmap_count, x; |
| 1143 | struct buffer_head *bitmap_bh = NULL; |
| 1144 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1145 | es = EXT4_SB(sb)->s_es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1146 | desc_count = 0; |
| 1147 | bitmap_count = 0; |
| 1148 | gdp = NULL; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 1149 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1150 | gdp = ext4_get_group_desc(sb, i, NULL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1151 | if (!gdp) |
| 1152 | continue; |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 1153 | desc_count += ext4_free_inodes_count(sb, gdp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1154 | brelse(bitmap_bh); |
Eric Sandeen | e29d1cd | 2008-08-02 21:21:02 -0400 | [diff] [blame] | 1155 | bitmap_bh = ext4_read_inode_bitmap(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1156 | if (!bitmap_bh) |
| 1157 | continue; |
| 1158 | |
Theodore Ts'o | f6fb99c | 2012-06-30 19:14:57 -0400 | [diff] [blame] | 1159 | x = ext4_count_free(bitmap_bh->b_data, |
| 1160 | EXT4_INODES_PER_GROUP(sb) / 8); |
Eric Sandeen | c549a95 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1161 | printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n", |
Peng Tao | 785b4b3 | 2009-07-27 21:44:40 -0400 | [diff] [blame] | 1162 | (unsigned long) i, ext4_free_inodes_count(sb, gdp), x); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1163 | bitmap_count += x; |
| 1164 | } |
| 1165 | brelse(bitmap_bh); |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 1166 | printk(KERN_DEBUG "ext4_count_free_inodes: " |
| 1167 | "stored = %u, computed = %lu, %lu\n", |
| 1168 | le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1169 | return desc_count; |
| 1170 | #else |
| 1171 | desc_count = 0; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 1172 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1173 | gdp = ext4_get_group_desc(sb, i, NULL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1174 | if (!gdp) |
| 1175 | continue; |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 1176 | desc_count += ext4_free_inodes_count(sb, gdp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1177 | cond_resched(); |
| 1178 | } |
| 1179 | return desc_count; |
| 1180 | #endif |
| 1181 | } |
| 1182 | |
| 1183 | /* Called at mount-time, super-block is locked */ |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1184 | unsigned long ext4_count_dirs(struct super_block * sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1185 | { |
| 1186 | unsigned long count = 0; |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 1187 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1188 | |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 1189 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1190 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1191 | if (!gdp) |
| 1192 | continue; |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 1193 | count += ext4_used_dirs_count(sb, gdp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1194 | } |
| 1195 | return count; |
| 1196 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1197 | |
| 1198 | /* |
| 1199 | * Zeroes not yet zeroed inode table - just write zeroes through the whole |
| 1200 | * inode table. Must be called without any spinlock held. The only place |
| 1201 | * where it is called from on active part of filesystem is ext4lazyinit |
| 1202 | * thread, so we do not need any special locks, however we have to prevent |
| 1203 | * 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] | 1204 | * block ext4_new_inode() until we are finished. |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1205 | */ |
H Hartley Sweeten | e0cbee3 | 2011-10-18 10:57:51 -0400 | [diff] [blame] | 1206 | 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] | 1207 | int barrier) |
| 1208 | { |
| 1209 | struct ext4_group_info *grp = ext4_get_group_info(sb, group); |
| 1210 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1211 | struct ext4_group_desc *gdp = NULL; |
| 1212 | struct buffer_head *group_desc_bh; |
| 1213 | handle_t *handle; |
| 1214 | ext4_fsblk_t blk; |
| 1215 | int num, ret = 0, used_blks = 0; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1216 | |
| 1217 | /* This should not happen, but just to be sure check this */ |
| 1218 | if (sb->s_flags & MS_RDONLY) { |
| 1219 | ret = 1; |
| 1220 | goto out; |
| 1221 | } |
| 1222 | |
| 1223 | gdp = ext4_get_group_desc(sb, group, &group_desc_bh); |
| 1224 | if (!gdp) |
| 1225 | goto out; |
| 1226 | |
| 1227 | /* |
| 1228 | * We do not need to lock this, because we are the only one |
| 1229 | * handling this flag. |
| 1230 | */ |
| 1231 | if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)) |
| 1232 | goto out; |
| 1233 | |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 1234 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1235 | if (IS_ERR(handle)) { |
| 1236 | ret = PTR_ERR(handle); |
| 1237 | goto out; |
| 1238 | } |
| 1239 | |
| 1240 | down_write(&grp->alloc_sem); |
| 1241 | /* |
| 1242 | * If inode bitmap was already initialized there may be some |
| 1243 | * used inodes so we need to skip blocks with used inodes in |
| 1244 | * inode table. |
| 1245 | */ |
| 1246 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT))) |
| 1247 | used_blks = DIV_ROUND_UP((EXT4_INODES_PER_GROUP(sb) - |
| 1248 | ext4_itable_unused_count(sb, gdp)), |
| 1249 | sbi->s_inodes_per_block); |
| 1250 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1251 | if ((used_blks < 0) || (used_blks > sbi->s_itb_per_group)) { |
Theodore Ts'o | 1084f25 | 2012-03-19 23:13:43 -0400 | [diff] [blame] | 1252 | ext4_error(sb, "Something is wrong with group %u: " |
| 1253 | "used itable blocks: %d; " |
| 1254 | "itable unused count: %u", |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1255 | group, used_blks, |
| 1256 | ext4_itable_unused_count(sb, gdp)); |
| 1257 | ret = 1; |
Yongqiang Yang | 33853a0 | 2011-08-01 06:32:19 -0400 | [diff] [blame] | 1258 | goto err_out; |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1259 | } |
| 1260 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1261 | blk = ext4_inode_table(sb, gdp) + used_blks; |
| 1262 | num = sbi->s_itb_per_group - used_blks; |
| 1263 | |
| 1264 | BUFFER_TRACE(group_desc_bh, "get_write_access"); |
| 1265 | ret = ext4_journal_get_write_access(handle, |
| 1266 | group_desc_bh); |
| 1267 | if (ret) |
| 1268 | goto err_out; |
| 1269 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1270 | /* |
| 1271 | * Skip zeroout if the inode table is full. But we set the ZEROED |
| 1272 | * flag anyway, because obviously, when it is full it does not need |
| 1273 | * further zeroing. |
| 1274 | */ |
| 1275 | if (unlikely(num == 0)) |
| 1276 | goto skip_zeroout; |
| 1277 | |
| 1278 | ext4_debug("going to zero out inode table in group %d\n", |
| 1279 | group); |
Theodore Ts'o | a107e5a | 2010-10-27 23:44:47 -0400 | [diff] [blame] | 1280 | ret = sb_issue_zeroout(sb, blk, num, GFP_NOFS); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1281 | if (ret < 0) |
| 1282 | goto err_out; |
Theodore Ts'o | a107e5a | 2010-10-27 23:44:47 -0400 | [diff] [blame] | 1283 | if (barrier) |
| 1284 | blkdev_issue_flush(sb->s_bdev, GFP_NOFS, NULL); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1285 | |
| 1286 | skip_zeroout: |
| 1287 | ext4_lock_group(sb, group); |
| 1288 | gdp->bg_flags |= cpu_to_le16(EXT4_BG_INODE_ZEROED); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 1289 | ext4_group_desc_csum_set(sb, group, gdp); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1290 | ext4_unlock_group(sb, group); |
| 1291 | |
| 1292 | BUFFER_TRACE(group_desc_bh, |
| 1293 | "call ext4_handle_dirty_metadata"); |
| 1294 | ret = ext4_handle_dirty_metadata(handle, NULL, |
| 1295 | group_desc_bh); |
| 1296 | |
| 1297 | err_out: |
| 1298 | up_write(&grp->alloc_sem); |
| 1299 | ext4_journal_stop(handle); |
| 1300 | out: |
| 1301 | return ret; |
| 1302 | } |