1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/ialloc.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * BSD ufs-inspired inode and directory allocation by 11ac27a0ecSDave Kleikamp * Stephen Tweedie (sct@redhat.com), 1993 12ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 13ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 14ac27a0ecSDave Kleikamp */ 15ac27a0ecSDave Kleikamp 16ac27a0ecSDave Kleikamp #include <linux/time.h> 17ac27a0ecSDave Kleikamp #include <linux/fs.h> 18ac27a0ecSDave Kleikamp #include <linux/stat.h> 19ac27a0ecSDave Kleikamp #include <linux/string.h> 20ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 21ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 22ac27a0ecSDave Kleikamp #include <linux/random.h> 23ac27a0ecSDave Kleikamp #include <linux/bitops.h> 243a5b2ecdSMingming Cao #include <linux/blkdev.h> 255b825c3aSIngo Molnar #include <linux/cred.h> 265b825c3aSIngo Molnar 27ac27a0ecSDave Kleikamp #include <asm/byteorder.h> 289bffad1eSTheodore Ts'o 293dcf5451SChristoph Hellwig #include "ext4.h" 303dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 31ac27a0ecSDave Kleikamp #include "xattr.h" 32ac27a0ecSDave Kleikamp #include "acl.h" 33ac27a0ecSDave Kleikamp 349bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 359bffad1eSTheodore Ts'o 36ac27a0ecSDave Kleikamp /* 37ac27a0ecSDave Kleikamp * ialloc.c contains the inodes allocation and deallocation routines 38ac27a0ecSDave Kleikamp */ 39ac27a0ecSDave Kleikamp 40ac27a0ecSDave Kleikamp /* 41ac27a0ecSDave Kleikamp * The free inodes are managed by bitmaps. A file system contains several 42ac27a0ecSDave Kleikamp * blocks groups. Each group contains 1 bitmap block for blocks, 1 bitmap 43ac27a0ecSDave Kleikamp * block for inodes, N blocks for the inode table and data blocks. 44ac27a0ecSDave Kleikamp * 45ac27a0ecSDave Kleikamp * The file system contains group descriptors which are located after the 46ac27a0ecSDave Kleikamp * super block. Each descriptor contains the number of the bitmap block and 47ac27a0ecSDave Kleikamp * the free blocks count in the block. 48ac27a0ecSDave Kleikamp */ 49ac27a0ecSDave Kleikamp 50717d50e4SAndreas Dilger /* 51717d50e4SAndreas Dilger * To avoid calling the atomic setbit hundreds or thousands of times, we only 52717d50e4SAndreas Dilger * need to use it within a single byte (to ensure we get endianness right). 53717d50e4SAndreas Dilger * We can use memset for the rest of the bitmap as there are no other users. 54717d50e4SAndreas Dilger */ 5561d08673STheodore Ts'o void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap) 56717d50e4SAndreas Dilger { 57717d50e4SAndreas Dilger int i; 58717d50e4SAndreas Dilger 59717d50e4SAndreas Dilger if (start_bit >= end_bit) 60717d50e4SAndreas Dilger return; 61717d50e4SAndreas Dilger 62717d50e4SAndreas Dilger ext4_debug("mark end bits +%d through +%d used\n", start_bit, end_bit); 63717d50e4SAndreas Dilger for (i = start_bit; i < ((start_bit + 7) & ~7UL); i++) 64717d50e4SAndreas Dilger ext4_set_bit(i, bitmap); 65717d50e4SAndreas Dilger if (i < end_bit) 66717d50e4SAndreas Dilger memset(bitmap + (i >> 3), 0xff, (end_bit - i) >> 3); 67717d50e4SAndreas Dilger } 68717d50e4SAndreas Dilger 69813e5727STheodore Ts'o void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate) 70813e5727STheodore Ts'o { 71813e5727STheodore Ts'o if (uptodate) { 72813e5727STheodore Ts'o set_buffer_uptodate(bh); 73813e5727STheodore Ts'o set_bitmap_uptodate(bh); 74813e5727STheodore Ts'o } 75813e5727STheodore Ts'o unlock_buffer(bh); 76813e5727STheodore Ts'o put_bh(bh); 77813e5727STheodore Ts'o } 78813e5727STheodore Ts'o 799008a58eSDarrick J. Wong static int ext4_validate_inode_bitmap(struct super_block *sb, 809008a58eSDarrick J. Wong struct ext4_group_desc *desc, 819008a58eSDarrick J. Wong ext4_group_t block_group, 829008a58eSDarrick J. Wong struct buffer_head *bh) 839008a58eSDarrick J. Wong { 849008a58eSDarrick J. Wong ext4_fsblk_t blk; 858016e29fSHarshad Shirwadkar struct ext4_group_info *grp; 868016e29fSHarshad Shirwadkar 878016e29fSHarshad Shirwadkar if (EXT4_SB(sb)->s_mount_state & EXT4_FC_REPLAY) 888016e29fSHarshad Shirwadkar return 0; 898016e29fSHarshad Shirwadkar 908016e29fSHarshad Shirwadkar grp = ext4_get_group_info(sb, block_group); 919008a58eSDarrick J. Wong 929008a58eSDarrick J. Wong if (buffer_verified(bh)) 939008a58eSDarrick J. Wong return 0; 949008a58eSDarrick J. Wong if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) 959008a58eSDarrick J. Wong return -EFSCORRUPTED; 969008a58eSDarrick J. Wong 979008a58eSDarrick J. Wong ext4_lock_group(sb, block_group); 988d5a803cSTheodore Ts'o if (buffer_verified(bh)) 998d5a803cSTheodore Ts'o goto verified; 1009008a58eSDarrick J. Wong blk = ext4_inode_bitmap(sb, desc); 1019008a58eSDarrick J. Wong if (!ext4_inode_bitmap_csum_verify(sb, block_group, desc, bh, 10246f870d6STheodore Ts'o EXT4_INODES_PER_GROUP(sb) / 8) || 10346f870d6STheodore Ts'o ext4_simulate_fail(sb, EXT4_SIM_IBITMAP_CRC)) { 1049008a58eSDarrick J. Wong ext4_unlock_group(sb, block_group); 1059008a58eSDarrick J. Wong ext4_error(sb, "Corrupt inode bitmap - block_group = %u, " 1069008a58eSDarrick J. Wong "inode_bitmap = %llu", block_group, blk); 107db79e6d1SWang Shilong ext4_mark_group_bitmap_corrupted(sb, block_group, 108db79e6d1SWang Shilong EXT4_GROUP_INFO_IBITMAP_CORRUPT); 1099008a58eSDarrick J. Wong return -EFSBADCRC; 1109008a58eSDarrick J. Wong } 1119008a58eSDarrick J. Wong set_buffer_verified(bh); 1128d5a803cSTheodore Ts'o verified: 1139008a58eSDarrick J. Wong ext4_unlock_group(sb, block_group); 1149008a58eSDarrick J. Wong return 0; 1159008a58eSDarrick J. Wong } 1169008a58eSDarrick J. Wong 117ac27a0ecSDave Kleikamp /* 118ac27a0ecSDave Kleikamp * Read the inode allocation bitmap for a given block_group, reading 119ac27a0ecSDave Kleikamp * into the specified slot in the superblock's bitmap cache. 120ac27a0ecSDave Kleikamp * 1219033783cSJosh Triplett * Return buffer_head of bitmap on success, or an ERR_PTR on error. 122ac27a0ecSDave Kleikamp */ 123ac27a0ecSDave Kleikamp static struct buffer_head * 124e29d1cdeSEric Sandeen ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group) 125ac27a0ecSDave Kleikamp { 126617ba13bSMingming Cao struct ext4_group_desc *desc; 1277dac4a17STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 128ac27a0ecSDave Kleikamp struct buffer_head *bh = NULL; 129e29d1cdeSEric Sandeen ext4_fsblk_t bitmap_blk; 1309008a58eSDarrick J. Wong int err; 131ac27a0ecSDave Kleikamp 132617ba13bSMingming Cao desc = ext4_get_group_desc(sb, block_group, NULL); 133ac27a0ecSDave Kleikamp if (!desc) 1349008a58eSDarrick J. Wong return ERR_PTR(-EFSCORRUPTED); 135bfff6873SLukas Czerner 136e29d1cdeSEric Sandeen bitmap_blk = ext4_inode_bitmap(sb, desc); 1377dac4a17STheodore Ts'o if ((bitmap_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) || 1387dac4a17STheodore Ts'o (bitmap_blk >= ext4_blocks_count(sbi->s_es))) { 1397dac4a17STheodore Ts'o ext4_error(sb, "Invalid inode bitmap blk %llu in " 1407dac4a17STheodore Ts'o "block_group %u", bitmap_blk, block_group); 141206f6d55SWang Shilong ext4_mark_group_bitmap_corrupted(sb, block_group, 142206f6d55SWang Shilong EXT4_GROUP_INFO_IBITMAP_CORRUPT); 1437dac4a17STheodore Ts'o return ERR_PTR(-EFSCORRUPTED); 1447dac4a17STheodore Ts'o } 145e29d1cdeSEric Sandeen bh = sb_getblk(sb, bitmap_blk); 146e29d1cdeSEric Sandeen if (unlikely(!bh)) { 1475ef2a699SWang Shilong ext4_warning(sb, "Cannot read inode bitmap - " 148a9df9a49STheodore Ts'o "block_group = %u, inode_bitmap = %llu", 149e29d1cdeSEric Sandeen block_group, bitmap_blk); 1500db9fdebSWang Shilong return ERR_PTR(-ENOMEM); 151e29d1cdeSEric Sandeen } 1522ccb5fb9SAneesh Kumar K.V if (bitmap_uptodate(bh)) 15341a246d1SDarrick J. Wong goto verify; 154e29d1cdeSEric Sandeen 155c806e68fSFrederic Bohe lock_buffer(bh); 1562ccb5fb9SAneesh Kumar K.V if (bitmap_uptodate(bh)) { 1572ccb5fb9SAneesh Kumar K.V unlock_buffer(bh); 15841a246d1SDarrick J. Wong goto verify; 1592ccb5fb9SAneesh Kumar K.V } 160bfff6873SLukas Czerner 161955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, block_group); 1628844618dSTheodore Ts'o if (ext4_has_group_desc_csum(sb) && 1638844618dSTheodore Ts'o (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT))) { 1648844618dSTheodore Ts'o if (block_group == 0) { 1658844618dSTheodore Ts'o ext4_unlock_group(sb, block_group); 1668844618dSTheodore Ts'o unlock_buffer(bh); 1678844618dSTheodore Ts'o ext4_error(sb, "Inode bitmap for bg 0 marked " 1688844618dSTheodore Ts'o "uninitialized"); 1698844618dSTheodore Ts'o err = -EFSCORRUPTED; 1708844618dSTheodore Ts'o goto out; 1718844618dSTheodore Ts'o } 172044e6e3dSTheodore Ts'o memset(bh->b_data, 0, (EXT4_INODES_PER_GROUP(sb) + 7) / 8); 173044e6e3dSTheodore Ts'o ext4_mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), 174044e6e3dSTheodore Ts'o sb->s_blocksize * 8, bh->b_data); 1752ccb5fb9SAneesh Kumar K.V set_bitmap_uptodate(bh); 176e29d1cdeSEric Sandeen set_buffer_uptodate(bh); 17741a246d1SDarrick J. Wong set_buffer_verified(bh); 178955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, block_group); 1793300bedaSAneesh Kumar K.V unlock_buffer(bh); 180e29d1cdeSEric Sandeen return bh; 181e29d1cdeSEric Sandeen } 182955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, block_group); 183bfff6873SLukas Czerner 1842ccb5fb9SAneesh Kumar K.V if (buffer_uptodate(bh)) { 1852ccb5fb9SAneesh Kumar K.V /* 1862ccb5fb9SAneesh Kumar K.V * if not uninit if bh is uptodate, 1872ccb5fb9SAneesh Kumar K.V * bitmap is also uptodate 1882ccb5fb9SAneesh Kumar K.V */ 1892ccb5fb9SAneesh Kumar K.V set_bitmap_uptodate(bh); 1902ccb5fb9SAneesh Kumar K.V unlock_buffer(bh); 19141a246d1SDarrick J. Wong goto verify; 1922ccb5fb9SAneesh Kumar K.V } 1932ccb5fb9SAneesh Kumar K.V /* 194813e5727STheodore Ts'o * submit the buffer_head for reading 1952ccb5fb9SAneesh Kumar K.V */ 1960562e0baSJiaying Zhang trace_ext4_load_inode_bitmap(sb, block_group); 1972d069c08Szhangyi (F) ext4_read_bh(bh, REQ_META | REQ_PRIO, ext4_end_bitmap_read); 19846f870d6STheodore Ts'o ext4_simulate_fail_bh(sb, bh, EXT4_SIM_IBITMAP_EIO); 199813e5727STheodore Ts'o if (!buffer_uptodate(bh)) { 200e29d1cdeSEric Sandeen put_bh(bh); 20154d3adbcSTheodore Ts'o ext4_error_err(sb, EIO, "Cannot read inode bitmap - " 202a9df9a49STheodore Ts'o "block_group = %u, inode_bitmap = %llu", 203e29d1cdeSEric Sandeen block_group, bitmap_blk); 204206f6d55SWang Shilong ext4_mark_group_bitmap_corrupted(sb, block_group, 205206f6d55SWang Shilong EXT4_GROUP_INFO_IBITMAP_CORRUPT); 2069008a58eSDarrick J. Wong return ERR_PTR(-EIO); 207e29d1cdeSEric Sandeen } 20841a246d1SDarrick J. Wong 20941a246d1SDarrick J. Wong verify: 2109008a58eSDarrick J. Wong err = ext4_validate_inode_bitmap(sb, desc, block_group, bh); 2119008a58eSDarrick J. Wong if (err) 2129008a58eSDarrick J. Wong goto out; 213ac27a0ecSDave Kleikamp return bh; 2149008a58eSDarrick J. Wong out: 2159008a58eSDarrick J. Wong put_bh(bh); 2169008a58eSDarrick J. Wong return ERR_PTR(err); 217ac27a0ecSDave Kleikamp } 218ac27a0ecSDave Kleikamp 219ac27a0ecSDave Kleikamp /* 220ac27a0ecSDave Kleikamp * NOTE! When we get the inode, we're the only people 221ac27a0ecSDave Kleikamp * that have access to it, and as such there are no 222ac27a0ecSDave Kleikamp * race conditions we have to worry about. The inode 223ac27a0ecSDave Kleikamp * is not on the hash-lists, and it cannot be reached 224ac27a0ecSDave Kleikamp * through the filesystem because the directory entry 225ac27a0ecSDave Kleikamp * has been deleted earlier. 226ac27a0ecSDave Kleikamp * 227ac27a0ecSDave Kleikamp * HOWEVER: we must make sure that we get no aliases, 228ac27a0ecSDave Kleikamp * which means that we have to call "clear_inode()" 229ac27a0ecSDave Kleikamp * _before_ we mark the inode not in use in the inode 230ac27a0ecSDave Kleikamp * bitmaps. Otherwise a newly created file might use 231ac27a0ecSDave Kleikamp * the same inode number (not actually the same pointer 232ac27a0ecSDave Kleikamp * though), and then we'd have two inodes sharing the 233ac27a0ecSDave Kleikamp * same inode number and space on the harddisk. 234ac27a0ecSDave Kleikamp */ 235617ba13bSMingming Cao void ext4_free_inode(handle_t *handle, struct inode *inode) 236ac27a0ecSDave Kleikamp { 237ac27a0ecSDave Kleikamp struct super_block *sb = inode->i_sb; 238ac27a0ecSDave Kleikamp int is_directory; 239ac27a0ecSDave Kleikamp unsigned long ino; 240ac27a0ecSDave Kleikamp struct buffer_head *bitmap_bh = NULL; 241ac27a0ecSDave Kleikamp struct buffer_head *bh2; 242fd2d4291SAvantika Mathur ext4_group_t block_group; 243ac27a0ecSDave Kleikamp unsigned long bit; 244617ba13bSMingming Cao struct ext4_group_desc *gdp; 245617ba13bSMingming Cao struct ext4_super_block *es; 246617ba13bSMingming Cao struct ext4_sb_info *sbi; 2477ce9d5d1SEric Sandeen int fatal = 0, err, count, cleared; 24887a39389SDarrick J. Wong struct ext4_group_info *grp; 249ac27a0ecSDave Kleikamp 25092b97816STheodore Ts'o if (!sb) { 25192b97816STheodore Ts'o printk(KERN_ERR "EXT4-fs: %s:%d: inode on " 25292b97816STheodore Ts'o "nonexistent device\n", __func__, __LINE__); 25392b97816STheodore Ts'o return; 25492b97816STheodore Ts'o } 255ac27a0ecSDave Kleikamp if (atomic_read(&inode->i_count) > 1) { 25692b97816STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s:%d: inode #%lu: count=%d", 25792b97816STheodore Ts'o __func__, __LINE__, inode->i_ino, 258ac27a0ecSDave Kleikamp atomic_read(&inode->i_count)); 259ac27a0ecSDave Kleikamp return; 260ac27a0ecSDave Kleikamp } 261ac27a0ecSDave Kleikamp if (inode->i_nlink) { 26292b97816STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s:%d: inode #%lu: nlink=%d\n", 26392b97816STheodore Ts'o __func__, __LINE__, inode->i_ino, inode->i_nlink); 264ac27a0ecSDave Kleikamp return; 265ac27a0ecSDave Kleikamp } 266617ba13bSMingming Cao sbi = EXT4_SB(sb); 267ac27a0ecSDave Kleikamp 268ac27a0ecSDave Kleikamp ino = inode->i_ino; 269617ba13bSMingming Cao ext4_debug("freeing inode %lu\n", ino); 2709bffad1eSTheodore Ts'o trace_ext4_free_inode(inode); 271ac27a0ecSDave Kleikamp 272871a2931SChristoph Hellwig dquot_initialize(inode); 27363936ddaSChristoph Hellwig dquot_free_inode(inode); 274ac27a0ecSDave Kleikamp 275ac27a0ecSDave Kleikamp is_directory = S_ISDIR(inode->i_mode); 276ac27a0ecSDave Kleikamp 277ac27a0ecSDave Kleikamp /* Do this BEFORE marking the inode not in use or returning an error */ 2780930fcc1SAl Viro ext4_clear_inode(inode); 279ac27a0ecSDave Kleikamp 28049598e04SJun Piao es = sbi->s_es; 281617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) { 28212062dddSEric Sandeen ext4_error(sb, "reserved or nonexistent inode %lu", ino); 283ac27a0ecSDave Kleikamp goto error_return; 284ac27a0ecSDave Kleikamp } 285617ba13bSMingming Cao block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); 286617ba13bSMingming Cao bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); 287e29d1cdeSEric Sandeen bitmap_bh = ext4_read_inode_bitmap(sb, block_group); 28887a39389SDarrick J. Wong /* Don't bother if the inode bitmap is corrupt. */ 2899008a58eSDarrick J. Wong if (IS_ERR(bitmap_bh)) { 2909008a58eSDarrick J. Wong fatal = PTR_ERR(bitmap_bh); 2919008a58eSDarrick J. Wong bitmap_bh = NULL; 292ac27a0ecSDave Kleikamp goto error_return; 2939008a58eSDarrick J. Wong } 2948016e29fSHarshad Shirwadkar if (!(sbi->s_mount_state & EXT4_FC_REPLAY)) { 2958016e29fSHarshad Shirwadkar grp = ext4_get_group_info(sb, block_group); 2969008a58eSDarrick J. Wong if (unlikely(EXT4_MB_GRP_IBITMAP_CORRUPT(grp))) { 2979008a58eSDarrick J. Wong fatal = -EFSCORRUPTED; 2989008a58eSDarrick J. Wong goto error_return; 2999008a58eSDarrick J. Wong } 3008016e29fSHarshad Shirwadkar } 301ac27a0ecSDave Kleikamp 302ac27a0ecSDave Kleikamp BUFFER_TRACE(bitmap_bh, "get_write_access"); 303617ba13bSMingming Cao fatal = ext4_journal_get_write_access(handle, bitmap_bh); 304ac27a0ecSDave Kleikamp if (fatal) 305ac27a0ecSDave Kleikamp goto error_return; 306ac27a0ecSDave Kleikamp 307d17413c0SDmitry Monakhov fatal = -ESRCH; 308617ba13bSMingming Cao gdp = ext4_get_group_desc(sb, block_group, &bh2); 309d17413c0SDmitry Monakhov if (gdp) { 310ac27a0ecSDave Kleikamp BUFFER_TRACE(bh2, "get_write_access"); 311617ba13bSMingming Cao fatal = ext4_journal_get_write_access(handle, bh2); 312d17413c0SDmitry Monakhov } 313955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, block_group); 314597d508cSAkinobu Mita cleared = ext4_test_and_clear_bit(bit, bitmap_bh->b_data); 315d17413c0SDmitry Monakhov if (fatal || !cleared) { 316d17413c0SDmitry Monakhov ext4_unlock_group(sb, block_group); 317d17413c0SDmitry Monakhov goto out; 318d17413c0SDmitry Monakhov } 319d17413c0SDmitry Monakhov 320560671a0SAneesh Kumar K.V count = ext4_free_inodes_count(sb, gdp) + 1; 321560671a0SAneesh Kumar K.V ext4_free_inodes_set(sb, gdp, count); 322560671a0SAneesh Kumar K.V if (is_directory) { 323560671a0SAneesh Kumar K.V count = ext4_used_dirs_count(sb, gdp) - 1; 324560671a0SAneesh Kumar K.V ext4_used_dirs_set(sb, gdp, count); 325b45f189aSRitesh Harjani if (percpu_counter_initialized(&sbi->s_dirs_counter)) 326d17413c0SDmitry Monakhov percpu_counter_dec(&sbi->s_dirs_counter); 327d17413c0SDmitry Monakhov } 32841a246d1SDarrick J. Wong ext4_inode_bitmap_csum_set(sb, block_group, gdp, bitmap_bh, 32941a246d1SDarrick J. Wong EXT4_INODES_PER_GROUP(sb) / 8); 330feb0ab32SDarrick J. Wong ext4_group_desc_csum_set(sb, block_group, gdp); 331d17413c0SDmitry Monakhov ext4_unlock_group(sb, block_group); 3327d39db14STheodore Ts'o 333b45f189aSRitesh Harjani if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 334d17413c0SDmitry Monakhov percpu_counter_inc(&sbi->s_freeinodes_counter); 335d17413c0SDmitry Monakhov if (sbi->s_log_groups_per_flex) { 3367c990728SSuraj Jitindar Singh struct flex_groups *fg; 337d17413c0SDmitry Monakhov 3387c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, 3397c990728SSuraj Jitindar Singh ext4_flex_group(sbi, block_group)); 3407c990728SSuraj Jitindar Singh atomic_inc(&fg->free_inodes); 341d17413c0SDmitry Monakhov if (is_directory) 3427c990728SSuraj Jitindar Singh atomic_dec(&fg->used_dirs); 3437d39db14STheodore Ts'o } 3440390131bSFrank Mayhar BUFFER_TRACE(bh2, "call ext4_handle_dirty_metadata"); 345d17413c0SDmitry Monakhov fatal = ext4_handle_dirty_metadata(handle, NULL, bh2); 346d17413c0SDmitry Monakhov out: 347d17413c0SDmitry Monakhov if (cleared) { 3480390131bSFrank Mayhar BUFFER_TRACE(bitmap_bh, "call ext4_handle_dirty_metadata"); 3490390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh); 350ac27a0ecSDave Kleikamp if (!fatal) 351ac27a0ecSDave Kleikamp fatal = err; 35287a39389SDarrick J. Wong } else { 353d17413c0SDmitry Monakhov ext4_error(sb, "bit already cleared for inode %lu", ino); 354db79e6d1SWang Shilong ext4_mark_group_bitmap_corrupted(sb, block_group, 355db79e6d1SWang Shilong EXT4_GROUP_INFO_IBITMAP_CORRUPT); 35687a39389SDarrick J. Wong } 357d17413c0SDmitry Monakhov 358ac27a0ecSDave Kleikamp error_return: 359ac27a0ecSDave Kleikamp brelse(bitmap_bh); 360617ba13bSMingming Cao ext4_std_error(sb, fatal); 361ac27a0ecSDave Kleikamp } 362ac27a0ecSDave Kleikamp 363a4912123STheodore Ts'o struct orlov_stats { 36490ba983fSTheodore Ts'o __u64 free_clusters; 365a4912123STheodore Ts'o __u32 free_inodes; 366a4912123STheodore Ts'o __u32 used_dirs; 367a4912123STheodore Ts'o }; 368a4912123STheodore Ts'o 369a4912123STheodore Ts'o /* 370a4912123STheodore Ts'o * Helper function for Orlov's allocator; returns critical information 371a4912123STheodore Ts'o * for a particular block group or flex_bg. If flex_size is 1, then g 372a4912123STheodore Ts'o * is a block group number; otherwise it is flex_bg number. 373a4912123STheodore Ts'o */ 3741f109d5aSTheodore Ts'o static void get_orlov_stats(struct super_block *sb, ext4_group_t g, 375a4912123STheodore Ts'o int flex_size, struct orlov_stats *stats) 376a4912123STheodore Ts'o { 377a4912123STheodore Ts'o struct ext4_group_desc *desc; 378a4912123STheodore Ts'o 3797d39db14STheodore Ts'o if (flex_size > 1) { 3807c990728SSuraj Jitindar Singh struct flex_groups *fg = sbi_array_rcu_deref(EXT4_SB(sb), 3817c990728SSuraj Jitindar Singh s_flex_groups, g); 3827c990728SSuraj Jitindar Singh stats->free_inodes = atomic_read(&fg->free_inodes); 3837c990728SSuraj Jitindar Singh stats->free_clusters = atomic64_read(&fg->free_clusters); 3847c990728SSuraj Jitindar Singh stats->used_dirs = atomic_read(&fg->used_dirs); 3857d39db14STheodore Ts'o return; 3867d39db14STheodore Ts'o } 3877d39db14STheodore Ts'o 3887d39db14STheodore Ts'o desc = ext4_get_group_desc(sb, g, NULL); 3897d39db14STheodore Ts'o if (desc) { 3907d39db14STheodore Ts'o stats->free_inodes = ext4_free_inodes_count(sb, desc); 391021b65bbSTheodore Ts'o stats->free_clusters = ext4_free_group_clusters(sb, desc); 3927d39db14STheodore Ts'o stats->used_dirs = ext4_used_dirs_count(sb, desc); 3937d39db14STheodore Ts'o } else { 394a4912123STheodore Ts'o stats->free_inodes = 0; 39524aaa8efSTheodore Ts'o stats->free_clusters = 0; 396a4912123STheodore Ts'o stats->used_dirs = 0; 397a4912123STheodore Ts'o } 398a4912123STheodore Ts'o } 399a4912123STheodore Ts'o 400ac27a0ecSDave Kleikamp /* 401ac27a0ecSDave Kleikamp * Orlov's allocator for directories. 402ac27a0ecSDave Kleikamp * 403ac27a0ecSDave Kleikamp * We always try to spread first-level directories. 404ac27a0ecSDave Kleikamp * 405*c89849ccSPan Dong * If there are blockgroups with both free inodes and free clusters counts 406ac27a0ecSDave Kleikamp * not worse than average we return one with smallest directory count. 407ac27a0ecSDave Kleikamp * Otherwise we simply return a random group. 408ac27a0ecSDave Kleikamp * 409ac27a0ecSDave Kleikamp * For the rest rules look so: 410ac27a0ecSDave Kleikamp * 411ac27a0ecSDave Kleikamp * It's OK to put directory into a group unless 412ac27a0ecSDave Kleikamp * it has too many directories already (max_dirs) or 413ac27a0ecSDave Kleikamp * it has too few free inodes left (min_inodes) or 414*c89849ccSPan Dong * it has too few free clusters left (min_clusters) or 4151cc8dcf5SBenoit Boissinot * Parent's group is preferred, if it doesn't satisfy these 416ac27a0ecSDave Kleikamp * conditions we search cyclically through the rest. If none 417ac27a0ecSDave Kleikamp * of the groups look good we just look for a group with more 418ac27a0ecSDave Kleikamp * free inodes than average (starting at parent's group). 419ac27a0ecSDave Kleikamp */ 420ac27a0ecSDave Kleikamp 4212aa9fc4cSAvantika Mathur static int find_group_orlov(struct super_block *sb, struct inode *parent, 422dcca3fecSAl Viro ext4_group_t *group, umode_t mode, 423f157a4aaSTheodore Ts'o const struct qstr *qstr) 424ac27a0ecSDave Kleikamp { 425fd2d4291SAvantika Mathur ext4_group_t parent_group = EXT4_I(parent)->i_block_group; 426617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4278df9675fSTheodore Ts'o ext4_group_t real_ngroups = ext4_get_groups_count(sb); 428617ba13bSMingming Cao int inodes_per_group = EXT4_INODES_PER_GROUP(sb); 42914c83c9fSTheodore Ts'o unsigned int freei, avefreei, grp_free; 430*c89849ccSPan Dong ext4_fsblk_t freec, avefreec; 431ac27a0ecSDave Kleikamp unsigned int ndirs; 432a4912123STheodore Ts'o int max_dirs, min_inodes; 43324aaa8efSTheodore Ts'o ext4_grpblk_t min_clusters; 4348df9675fSTheodore Ts'o ext4_group_t i, grp, g, ngroups; 435617ba13bSMingming Cao struct ext4_group_desc *desc; 436a4912123STheodore Ts'o struct orlov_stats stats; 437a4912123STheodore Ts'o int flex_size = ext4_flex_bg_size(sbi); 438f157a4aaSTheodore Ts'o struct dx_hash_info hinfo; 439a4912123STheodore Ts'o 4408df9675fSTheodore Ts'o ngroups = real_ngroups; 441a4912123STheodore Ts'o if (flex_size > 1) { 4428df9675fSTheodore Ts'o ngroups = (real_ngroups + flex_size - 1) >> 443a4912123STheodore Ts'o sbi->s_log_groups_per_flex; 444a4912123STheodore Ts'o parent_group >>= sbi->s_log_groups_per_flex; 445a4912123STheodore Ts'o } 446ac27a0ecSDave Kleikamp 447ac27a0ecSDave Kleikamp freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter); 448ac27a0ecSDave Kleikamp avefreei = freei / ngroups; 449*c89849ccSPan Dong freec = percpu_counter_read_positive(&sbi->s_freeclusters_counter); 450*c89849ccSPan Dong avefreec = freec; 45124aaa8efSTheodore Ts'o do_div(avefreec, ngroups); 452ac27a0ecSDave Kleikamp ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter); 453ac27a0ecSDave Kleikamp 454a4912123STheodore Ts'o if (S_ISDIR(mode) && 4552b0143b5SDavid Howells ((parent == d_inode(sb->s_root)) || 45612e9b892SDmitry Monakhov (ext4_test_inode_flag(parent, EXT4_INODE_TOPDIR)))) { 457ac27a0ecSDave Kleikamp int best_ndir = inodes_per_group; 4582aa9fc4cSAvantika Mathur int ret = -1; 459ac27a0ecSDave Kleikamp 460f157a4aaSTheodore Ts'o if (qstr) { 461f157a4aaSTheodore Ts'o hinfo.hash_version = DX_HASH_HALF_MD4; 462f157a4aaSTheodore Ts'o hinfo.seed = sbi->s_hash_seed; 463b886ee3eSGabriel Krisman Bertazi ext4fs_dirhash(parent, qstr->name, qstr->len, &hinfo); 464f157a4aaSTheodore Ts'o grp = hinfo.hash; 465f157a4aaSTheodore Ts'o } else 466dd1f723bSTheodore Ts'o grp = prandom_u32(); 4672aa9fc4cSAvantika Mathur parent_group = (unsigned)grp % ngroups; 468ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 469a4912123STheodore Ts'o g = (parent_group + i) % ngroups; 470a4912123STheodore Ts'o get_orlov_stats(sb, g, flex_size, &stats); 471a4912123STheodore Ts'o if (!stats.free_inodes) 472ac27a0ecSDave Kleikamp continue; 473a4912123STheodore Ts'o if (stats.used_dirs >= best_ndir) 474ac27a0ecSDave Kleikamp continue; 475a4912123STheodore Ts'o if (stats.free_inodes < avefreei) 476ac27a0ecSDave Kleikamp continue; 47724aaa8efSTheodore Ts'o if (stats.free_clusters < avefreec) 478ac27a0ecSDave Kleikamp continue; 479a4912123STheodore Ts'o grp = g; 4802aa9fc4cSAvantika Mathur ret = 0; 481a4912123STheodore Ts'o best_ndir = stats.used_dirs; 482ac27a0ecSDave Kleikamp } 483a4912123STheodore Ts'o if (ret) 484a4912123STheodore Ts'o goto fallback; 485a4912123STheodore Ts'o found_flex_bg: 486a4912123STheodore Ts'o if (flex_size == 1) { 487a4912123STheodore Ts'o *group = grp; 488a4912123STheodore Ts'o return 0; 489a4912123STheodore Ts'o } 490a4912123STheodore Ts'o 491a4912123STheodore Ts'o /* 492a4912123STheodore Ts'o * We pack inodes at the beginning of the flexgroup's 493a4912123STheodore Ts'o * inode tables. Block allocation decisions will do 494a4912123STheodore Ts'o * something similar, although regular files will 495a4912123STheodore Ts'o * start at 2nd block group of the flexgroup. See 496a4912123STheodore Ts'o * ext4_ext_find_goal() and ext4_find_near(). 497a4912123STheodore Ts'o */ 498a4912123STheodore Ts'o grp *= flex_size; 499a4912123STheodore Ts'o for (i = 0; i < flex_size; i++) { 5008df9675fSTheodore Ts'o if (grp+i >= real_ngroups) 501a4912123STheodore Ts'o break; 502a4912123STheodore Ts'o desc = ext4_get_group_desc(sb, grp+i, NULL); 503a4912123STheodore Ts'o if (desc && ext4_free_inodes_count(sb, desc)) { 504a4912123STheodore Ts'o *group = grp+i; 505a4912123STheodore Ts'o return 0; 506a4912123STheodore Ts'o } 507a4912123STheodore Ts'o } 508ac27a0ecSDave Kleikamp goto fallback; 509ac27a0ecSDave Kleikamp } 510ac27a0ecSDave Kleikamp 511ac27a0ecSDave Kleikamp max_dirs = ndirs / ngroups + inodes_per_group / 16; 512a4912123STheodore Ts'o min_inodes = avefreei - inodes_per_group*flex_size / 4; 513a4912123STheodore Ts'o if (min_inodes < 1) 514a4912123STheodore Ts'o min_inodes = 1; 51524aaa8efSTheodore Ts'o min_clusters = avefreec - EXT4_CLUSTERS_PER_GROUP(sb)*flex_size / 4; 516ac27a0ecSDave Kleikamp 517a4912123STheodore Ts'o /* 518a4912123STheodore Ts'o * Start looking in the flex group where we last allocated an 519a4912123STheodore Ts'o * inode for this parent directory 520a4912123STheodore Ts'o */ 521a4912123STheodore Ts'o if (EXT4_I(parent)->i_last_alloc_group != ~0) { 522a4912123STheodore Ts'o parent_group = EXT4_I(parent)->i_last_alloc_group; 523a4912123STheodore Ts'o if (flex_size > 1) 524a4912123STheodore Ts'o parent_group >>= sbi->s_log_groups_per_flex; 525a4912123STheodore Ts'o } 526ac27a0ecSDave Kleikamp 527ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 528a4912123STheodore Ts'o grp = (parent_group + i) % ngroups; 529a4912123STheodore Ts'o get_orlov_stats(sb, grp, flex_size, &stats); 530a4912123STheodore Ts'o if (stats.used_dirs >= max_dirs) 531ac27a0ecSDave Kleikamp continue; 532a4912123STheodore Ts'o if (stats.free_inodes < min_inodes) 533ac27a0ecSDave Kleikamp continue; 53424aaa8efSTheodore Ts'o if (stats.free_clusters < min_clusters) 535ac27a0ecSDave Kleikamp continue; 536a4912123STheodore Ts'o goto found_flex_bg; 537ac27a0ecSDave Kleikamp } 538ac27a0ecSDave Kleikamp 539ac27a0ecSDave Kleikamp fallback: 5408df9675fSTheodore Ts'o ngroups = real_ngroups; 541a4912123STheodore Ts'o avefreei = freei / ngroups; 542b5451f7bSTheodore Ts'o fallback_retry: 543a4912123STheodore Ts'o parent_group = EXT4_I(parent)->i_block_group; 544ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 545a4912123STheodore Ts'o grp = (parent_group + i) % ngroups; 546a4912123STheodore Ts'o desc = ext4_get_group_desc(sb, grp, NULL); 547bb3d132aSDan Carpenter if (desc) { 54814c83c9fSTheodore Ts'o grp_free = ext4_free_inodes_count(sb, desc); 549bb3d132aSDan Carpenter if (grp_free && grp_free >= avefreei) { 550a4912123STheodore Ts'o *group = grp; 5512aa9fc4cSAvantika Mathur return 0; 552ac27a0ecSDave Kleikamp } 553a4912123STheodore Ts'o } 554bb3d132aSDan Carpenter } 555ac27a0ecSDave Kleikamp 556ac27a0ecSDave Kleikamp if (avefreei) { 557ac27a0ecSDave Kleikamp /* 558ac27a0ecSDave Kleikamp * The free-inodes counter is approximate, and for really small 559ac27a0ecSDave Kleikamp * filesystems the above test can fail to find any blockgroups 560ac27a0ecSDave Kleikamp */ 561ac27a0ecSDave Kleikamp avefreei = 0; 562b5451f7bSTheodore Ts'o goto fallback_retry; 563ac27a0ecSDave Kleikamp } 564ac27a0ecSDave Kleikamp 565ac27a0ecSDave Kleikamp return -1; 566ac27a0ecSDave Kleikamp } 567ac27a0ecSDave Kleikamp 5682aa9fc4cSAvantika Mathur static int find_group_other(struct super_block *sb, struct inode *parent, 569dcca3fecSAl Viro ext4_group_t *group, umode_t mode) 570ac27a0ecSDave Kleikamp { 571fd2d4291SAvantika Mathur ext4_group_t parent_group = EXT4_I(parent)->i_block_group; 5728df9675fSTheodore Ts'o ext4_group_t i, last, ngroups = ext4_get_groups_count(sb); 573617ba13bSMingming Cao struct ext4_group_desc *desc; 574a4912123STheodore Ts'o int flex_size = ext4_flex_bg_size(EXT4_SB(sb)); 575a4912123STheodore Ts'o 576a4912123STheodore Ts'o /* 577a4912123STheodore Ts'o * Try to place the inode is the same flex group as its 578a4912123STheodore Ts'o * parent. If we can't find space, use the Orlov algorithm to 579a4912123STheodore Ts'o * find another flex group, and store that information in the 580a4912123STheodore Ts'o * parent directory's inode information so that use that flex 581a4912123STheodore Ts'o * group for future allocations. 582a4912123STheodore Ts'o */ 583a4912123STheodore Ts'o if (flex_size > 1) { 584a4912123STheodore Ts'o int retry = 0; 585a4912123STheodore Ts'o 586a4912123STheodore Ts'o try_again: 587a4912123STheodore Ts'o parent_group &= ~(flex_size-1); 588a4912123STheodore Ts'o last = parent_group + flex_size; 589a4912123STheodore Ts'o if (last > ngroups) 590a4912123STheodore Ts'o last = ngroups; 591a4912123STheodore Ts'o for (i = parent_group; i < last; i++) { 592a4912123STheodore Ts'o desc = ext4_get_group_desc(sb, i, NULL); 593a4912123STheodore Ts'o if (desc && ext4_free_inodes_count(sb, desc)) { 594a4912123STheodore Ts'o *group = i; 595a4912123STheodore Ts'o return 0; 596a4912123STheodore Ts'o } 597a4912123STheodore Ts'o } 598a4912123STheodore Ts'o if (!retry && EXT4_I(parent)->i_last_alloc_group != ~0) { 599a4912123STheodore Ts'o retry = 1; 600a4912123STheodore Ts'o parent_group = EXT4_I(parent)->i_last_alloc_group; 601a4912123STheodore Ts'o goto try_again; 602a4912123STheodore Ts'o } 603a4912123STheodore Ts'o /* 604a4912123STheodore Ts'o * If this didn't work, use the Orlov search algorithm 605a4912123STheodore Ts'o * to find a new flex group; we pass in the mode to 606a4912123STheodore Ts'o * avoid the topdir algorithms. 607a4912123STheodore Ts'o */ 608a4912123STheodore Ts'o *group = parent_group + flex_size; 609a4912123STheodore Ts'o if (*group > ngroups) 610a4912123STheodore Ts'o *group = 0; 6117dc57615SPeter Huewe return find_group_orlov(sb, parent, group, mode, NULL); 612a4912123STheodore Ts'o } 613ac27a0ecSDave Kleikamp 614ac27a0ecSDave Kleikamp /* 615ac27a0ecSDave Kleikamp * Try to place the inode in its parent directory 616ac27a0ecSDave Kleikamp */ 6172aa9fc4cSAvantika Mathur *group = parent_group; 6182aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 619560671a0SAneesh Kumar K.V if (desc && ext4_free_inodes_count(sb, desc) && 620021b65bbSTheodore Ts'o ext4_free_group_clusters(sb, desc)) 6212aa9fc4cSAvantika Mathur return 0; 622ac27a0ecSDave Kleikamp 623ac27a0ecSDave Kleikamp /* 624ac27a0ecSDave Kleikamp * We're going to place this inode in a different blockgroup from its 625ac27a0ecSDave Kleikamp * parent. We want to cause files in a common directory to all land in 626ac27a0ecSDave Kleikamp * the same blockgroup. But we want files which are in a different 627ac27a0ecSDave Kleikamp * directory which shares a blockgroup with our parent to land in a 628ac27a0ecSDave Kleikamp * different blockgroup. 629ac27a0ecSDave Kleikamp * 630ac27a0ecSDave Kleikamp * So add our directory's i_ino into the starting point for the hash. 631ac27a0ecSDave Kleikamp */ 6322aa9fc4cSAvantika Mathur *group = (*group + parent->i_ino) % ngroups; 633ac27a0ecSDave Kleikamp 634ac27a0ecSDave Kleikamp /* 635ac27a0ecSDave Kleikamp * Use a quadratic hash to find a group with a free inode and some free 636ac27a0ecSDave Kleikamp * blocks. 637ac27a0ecSDave Kleikamp */ 638ac27a0ecSDave Kleikamp for (i = 1; i < ngroups; i <<= 1) { 6392aa9fc4cSAvantika Mathur *group += i; 6402aa9fc4cSAvantika Mathur if (*group >= ngroups) 6412aa9fc4cSAvantika Mathur *group -= ngroups; 6422aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 643560671a0SAneesh Kumar K.V if (desc && ext4_free_inodes_count(sb, desc) && 644021b65bbSTheodore Ts'o ext4_free_group_clusters(sb, desc)) 6452aa9fc4cSAvantika Mathur return 0; 646ac27a0ecSDave Kleikamp } 647ac27a0ecSDave Kleikamp 648ac27a0ecSDave Kleikamp /* 649ac27a0ecSDave Kleikamp * That failed: try linear search for a free inode, even if that group 650ac27a0ecSDave Kleikamp * has no free blocks. 651ac27a0ecSDave Kleikamp */ 6522aa9fc4cSAvantika Mathur *group = parent_group; 653ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 6542aa9fc4cSAvantika Mathur if (++*group >= ngroups) 6552aa9fc4cSAvantika Mathur *group = 0; 6562aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 657560671a0SAneesh Kumar K.V if (desc && ext4_free_inodes_count(sb, desc)) 6582aa9fc4cSAvantika Mathur return 0; 659ac27a0ecSDave Kleikamp } 660ac27a0ecSDave Kleikamp 661ac27a0ecSDave Kleikamp return -1; 662ac27a0ecSDave Kleikamp } 663ac27a0ecSDave Kleikamp 664ac27a0ecSDave Kleikamp /* 66519883bd9STheodore Ts'o * In no journal mode, if an inode has recently been deleted, we want 66619883bd9STheodore Ts'o * to avoid reusing it until we're reasonably sure the inode table 66719883bd9STheodore Ts'o * block has been written back to disk. (Yes, these values are 66819883bd9STheodore Ts'o * somewhat arbitrary...) 66919883bd9STheodore Ts'o */ 670a17a9d93STheodore Ts'o #define RECENTCY_MIN 60 671b5f51573SAndreas Dilger #define RECENTCY_DIRTY 300 67219883bd9STheodore Ts'o 67319883bd9STheodore Ts'o static int recently_deleted(struct super_block *sb, ext4_group_t group, int ino) 67419883bd9STheodore Ts'o { 67519883bd9STheodore Ts'o struct ext4_group_desc *gdp; 67619883bd9STheodore Ts'o struct ext4_inode *raw_inode; 67719883bd9STheodore Ts'o struct buffer_head *bh; 67819883bd9STheodore Ts'o int inodes_per_block = EXT4_SB(sb)->s_inodes_per_block; 679b5f51573SAndreas Dilger int offset, ret = 0; 680b5f51573SAndreas Dilger int recentcy = RECENTCY_MIN; 681b5f51573SAndreas Dilger u32 dtime, now; 68219883bd9STheodore Ts'o 68319883bd9STheodore Ts'o gdp = ext4_get_group_desc(sb, group, NULL); 68419883bd9STheodore Ts'o if (unlikely(!gdp)) 68519883bd9STheodore Ts'o return 0; 68619883bd9STheodore Ts'o 6874f9d956dSJan Kara bh = sb_find_get_block(sb, ext4_inode_table(sb, gdp) + 68819883bd9STheodore Ts'o (ino / inodes_per_block)); 6894f9d956dSJan Kara if (!bh || !buffer_uptodate(bh)) 69019883bd9STheodore Ts'o /* 69119883bd9STheodore Ts'o * If the block is not in the buffer cache, then it 69219883bd9STheodore Ts'o * must have been written out. 69319883bd9STheodore Ts'o */ 69419883bd9STheodore Ts'o goto out; 69519883bd9STheodore Ts'o 69619883bd9STheodore Ts'o offset = (ino % inodes_per_block) * EXT4_INODE_SIZE(sb); 69719883bd9STheodore Ts'o raw_inode = (struct ext4_inode *) (bh->b_data + offset); 698b5f51573SAndreas Dilger 699b5f51573SAndreas Dilger /* i_dtime is only 32 bits on disk, but we only care about relative 700b5f51573SAndreas Dilger * times in the range of a few minutes (i.e. long enough to sync a 701b5f51573SAndreas Dilger * recently-deleted inode to disk), so using the low 32 bits of the 702b5f51573SAndreas Dilger * clock (a 68 year range) is enough, see time_before32() */ 70319883bd9STheodore Ts'o dtime = le32_to_cpu(raw_inode->i_dtime); 704b5f51573SAndreas Dilger now = ktime_get_real_seconds(); 70519883bd9STheodore Ts'o if (buffer_dirty(bh)) 70619883bd9STheodore Ts'o recentcy += RECENTCY_DIRTY; 70719883bd9STheodore Ts'o 708b5f51573SAndreas Dilger if (dtime && time_before32(dtime, now) && 709b5f51573SAndreas Dilger time_before32(now, dtime + recentcy)) 71019883bd9STheodore Ts'o ret = 1; 71119883bd9STheodore Ts'o out: 71219883bd9STheodore Ts'o brelse(bh); 71319883bd9STheodore Ts'o return ret; 71419883bd9STheodore Ts'o } 71519883bd9STheodore Ts'o 716901ed070SWang Shilong static int find_inode_bit(struct super_block *sb, ext4_group_t group, 717901ed070SWang Shilong struct buffer_head *bitmap, unsigned long *ino) 718901ed070SWang Shilong { 719d05466b2SJan Kara bool check_recently_deleted = EXT4_SB(sb)->s_journal == NULL; 720d05466b2SJan Kara unsigned long recently_deleted_ino = EXT4_INODES_PER_GROUP(sb); 721d05466b2SJan Kara 722901ed070SWang Shilong next: 723901ed070SWang Shilong *ino = ext4_find_next_zero_bit((unsigned long *) 724901ed070SWang Shilong bitmap->b_data, 725901ed070SWang Shilong EXT4_INODES_PER_GROUP(sb), *ino); 726901ed070SWang Shilong if (*ino >= EXT4_INODES_PER_GROUP(sb)) 727d05466b2SJan Kara goto not_found; 728901ed070SWang Shilong 729d05466b2SJan Kara if (check_recently_deleted && recently_deleted(sb, group, *ino)) { 730d05466b2SJan Kara recently_deleted_ino = *ino; 731901ed070SWang Shilong *ino = *ino + 1; 732901ed070SWang Shilong if (*ino < EXT4_INODES_PER_GROUP(sb)) 733901ed070SWang Shilong goto next; 734d05466b2SJan Kara goto not_found; 735901ed070SWang Shilong } 736d05466b2SJan Kara return 1; 737d05466b2SJan Kara not_found: 738d05466b2SJan Kara if (recently_deleted_ino >= EXT4_INODES_PER_GROUP(sb)) 739d05466b2SJan Kara return 0; 740d05466b2SJan Kara /* 741d05466b2SJan Kara * Not reusing recently deleted inodes is mostly a preference. We don't 742d05466b2SJan Kara * want to report ENOSPC or skew allocation patterns because of that. 743d05466b2SJan Kara * So return even recently deleted inode if we could find better in the 744d05466b2SJan Kara * given range. 745d05466b2SJan Kara */ 746d05466b2SJan Kara *ino = recently_deleted_ino; 747901ed070SWang Shilong return 1; 748901ed070SWang Shilong } 749901ed070SWang Shilong 7508016e29fSHarshad Shirwadkar int ext4_mark_inode_used(struct super_block *sb, int ino) 7518016e29fSHarshad Shirwadkar { 7528016e29fSHarshad Shirwadkar unsigned long max_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count); 7538016e29fSHarshad Shirwadkar struct buffer_head *inode_bitmap_bh = NULL, *group_desc_bh = NULL; 7548016e29fSHarshad Shirwadkar struct ext4_group_desc *gdp; 7558016e29fSHarshad Shirwadkar ext4_group_t group; 7568016e29fSHarshad Shirwadkar int bit; 7578016e29fSHarshad Shirwadkar int err = -EFSCORRUPTED; 7588016e29fSHarshad Shirwadkar 7598016e29fSHarshad Shirwadkar if (ino < EXT4_FIRST_INO(sb) || ino > max_ino) 7608016e29fSHarshad Shirwadkar goto out; 7618016e29fSHarshad Shirwadkar 7628016e29fSHarshad Shirwadkar group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); 7638016e29fSHarshad Shirwadkar bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); 7648016e29fSHarshad Shirwadkar inode_bitmap_bh = ext4_read_inode_bitmap(sb, group); 7658016e29fSHarshad Shirwadkar if (IS_ERR(inode_bitmap_bh)) 7668016e29fSHarshad Shirwadkar return PTR_ERR(inode_bitmap_bh); 7678016e29fSHarshad Shirwadkar 7688016e29fSHarshad Shirwadkar if (ext4_test_bit(bit, inode_bitmap_bh->b_data)) { 7698016e29fSHarshad Shirwadkar err = 0; 7708016e29fSHarshad Shirwadkar goto out; 7718016e29fSHarshad Shirwadkar } 7728016e29fSHarshad Shirwadkar 7738016e29fSHarshad Shirwadkar gdp = ext4_get_group_desc(sb, group, &group_desc_bh); 7748016e29fSHarshad Shirwadkar if (!gdp || !group_desc_bh) { 7758016e29fSHarshad Shirwadkar err = -EINVAL; 7768016e29fSHarshad Shirwadkar goto out; 7778016e29fSHarshad Shirwadkar } 7788016e29fSHarshad Shirwadkar 7798016e29fSHarshad Shirwadkar ext4_set_bit(bit, inode_bitmap_bh->b_data); 7808016e29fSHarshad Shirwadkar 7818016e29fSHarshad Shirwadkar BUFFER_TRACE(inode_bitmap_bh, "call ext4_handle_dirty_metadata"); 7828016e29fSHarshad Shirwadkar err = ext4_handle_dirty_metadata(NULL, NULL, inode_bitmap_bh); 7838016e29fSHarshad Shirwadkar if (err) { 7848016e29fSHarshad Shirwadkar ext4_std_error(sb, err); 7858016e29fSHarshad Shirwadkar goto out; 7868016e29fSHarshad Shirwadkar } 7878016e29fSHarshad Shirwadkar err = sync_dirty_buffer(inode_bitmap_bh); 7888016e29fSHarshad Shirwadkar if (err) { 7898016e29fSHarshad Shirwadkar ext4_std_error(sb, err); 7908016e29fSHarshad Shirwadkar goto out; 7918016e29fSHarshad Shirwadkar } 7928016e29fSHarshad Shirwadkar 7938016e29fSHarshad Shirwadkar /* We may have to initialize the block bitmap if it isn't already */ 7948016e29fSHarshad Shirwadkar if (ext4_has_group_desc_csum(sb) && 7958016e29fSHarshad Shirwadkar gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { 7968016e29fSHarshad Shirwadkar struct buffer_head *block_bitmap_bh; 7978016e29fSHarshad Shirwadkar 7988016e29fSHarshad Shirwadkar block_bitmap_bh = ext4_read_block_bitmap(sb, group); 7998016e29fSHarshad Shirwadkar if (IS_ERR(block_bitmap_bh)) { 8008016e29fSHarshad Shirwadkar err = PTR_ERR(block_bitmap_bh); 8018016e29fSHarshad Shirwadkar goto out; 8028016e29fSHarshad Shirwadkar } 8038016e29fSHarshad Shirwadkar 8048016e29fSHarshad Shirwadkar BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap"); 8058016e29fSHarshad Shirwadkar err = ext4_handle_dirty_metadata(NULL, NULL, block_bitmap_bh); 8068016e29fSHarshad Shirwadkar sync_dirty_buffer(block_bitmap_bh); 8078016e29fSHarshad Shirwadkar 8088016e29fSHarshad Shirwadkar /* recheck and clear flag under lock if we still need to */ 8098016e29fSHarshad Shirwadkar ext4_lock_group(sb, group); 8108016e29fSHarshad Shirwadkar if (ext4_has_group_desc_csum(sb) && 8118016e29fSHarshad Shirwadkar (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))) { 8128016e29fSHarshad Shirwadkar gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT); 8138016e29fSHarshad Shirwadkar ext4_free_group_clusters_set(sb, gdp, 8148016e29fSHarshad Shirwadkar ext4_free_clusters_after_init(sb, group, gdp)); 8158016e29fSHarshad Shirwadkar ext4_block_bitmap_csum_set(sb, group, gdp, 8168016e29fSHarshad Shirwadkar block_bitmap_bh); 8178016e29fSHarshad Shirwadkar ext4_group_desc_csum_set(sb, group, gdp); 8188016e29fSHarshad Shirwadkar } 8198016e29fSHarshad Shirwadkar ext4_unlock_group(sb, group); 8208016e29fSHarshad Shirwadkar brelse(block_bitmap_bh); 8218016e29fSHarshad Shirwadkar 8228016e29fSHarshad Shirwadkar if (err) { 8238016e29fSHarshad Shirwadkar ext4_std_error(sb, err); 8248016e29fSHarshad Shirwadkar goto out; 8258016e29fSHarshad Shirwadkar } 8268016e29fSHarshad Shirwadkar } 8278016e29fSHarshad Shirwadkar 8288016e29fSHarshad Shirwadkar /* Update the relevant bg descriptor fields */ 8298016e29fSHarshad Shirwadkar if (ext4_has_group_desc_csum(sb)) { 8308016e29fSHarshad Shirwadkar int free; 8318016e29fSHarshad Shirwadkar 8328016e29fSHarshad Shirwadkar ext4_lock_group(sb, group); /* while we modify the bg desc */ 8338016e29fSHarshad Shirwadkar free = EXT4_INODES_PER_GROUP(sb) - 8348016e29fSHarshad Shirwadkar ext4_itable_unused_count(sb, gdp); 8358016e29fSHarshad Shirwadkar if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { 8368016e29fSHarshad Shirwadkar gdp->bg_flags &= cpu_to_le16(~EXT4_BG_INODE_UNINIT); 8378016e29fSHarshad Shirwadkar free = 0; 8388016e29fSHarshad Shirwadkar } 8398016e29fSHarshad Shirwadkar 8408016e29fSHarshad Shirwadkar /* 8418016e29fSHarshad Shirwadkar * Check the relative inode number against the last used 8428016e29fSHarshad Shirwadkar * relative inode number in this group. if it is greater 8438016e29fSHarshad Shirwadkar * we need to update the bg_itable_unused count 8448016e29fSHarshad Shirwadkar */ 8458016e29fSHarshad Shirwadkar if (bit >= free) 8468016e29fSHarshad Shirwadkar ext4_itable_unused_set(sb, gdp, 8478016e29fSHarshad Shirwadkar (EXT4_INODES_PER_GROUP(sb) - bit - 1)); 8488016e29fSHarshad Shirwadkar } else { 8498016e29fSHarshad Shirwadkar ext4_lock_group(sb, group); 8508016e29fSHarshad Shirwadkar } 8518016e29fSHarshad Shirwadkar 8528016e29fSHarshad Shirwadkar ext4_free_inodes_set(sb, gdp, ext4_free_inodes_count(sb, gdp) - 1); 8538016e29fSHarshad Shirwadkar if (ext4_has_group_desc_csum(sb)) { 8548016e29fSHarshad Shirwadkar ext4_inode_bitmap_csum_set(sb, group, gdp, inode_bitmap_bh, 8558016e29fSHarshad Shirwadkar EXT4_INODES_PER_GROUP(sb) / 8); 8568016e29fSHarshad Shirwadkar ext4_group_desc_csum_set(sb, group, gdp); 8578016e29fSHarshad Shirwadkar } 8588016e29fSHarshad Shirwadkar 8598016e29fSHarshad Shirwadkar ext4_unlock_group(sb, group); 8608016e29fSHarshad Shirwadkar err = ext4_handle_dirty_metadata(NULL, NULL, group_desc_bh); 8618016e29fSHarshad Shirwadkar sync_dirty_buffer(group_desc_bh); 8628016e29fSHarshad Shirwadkar out: 8638016e29fSHarshad Shirwadkar return err; 8648016e29fSHarshad Shirwadkar } 8658016e29fSHarshad Shirwadkar 866177cc0e7SEric Biggers static int ext4_xattr_credits_for_new_inode(struct inode *dir, mode_t mode, 867177cc0e7SEric Biggers bool encrypt) 868177cc0e7SEric Biggers { 869177cc0e7SEric Biggers struct super_block *sb = dir->i_sb; 870177cc0e7SEric Biggers int nblocks = 0; 871177cc0e7SEric Biggers #ifdef CONFIG_EXT4_FS_POSIX_ACL 872177cc0e7SEric Biggers struct posix_acl *p = get_acl(dir, ACL_TYPE_DEFAULT); 873177cc0e7SEric Biggers 874177cc0e7SEric Biggers if (IS_ERR(p)) 875177cc0e7SEric Biggers return PTR_ERR(p); 876177cc0e7SEric Biggers if (p) { 877177cc0e7SEric Biggers int acl_size = p->a_count * sizeof(ext4_acl_entry); 878177cc0e7SEric Biggers 879177cc0e7SEric Biggers nblocks += (S_ISDIR(mode) ? 2 : 1) * 880177cc0e7SEric Biggers __ext4_xattr_set_credits(sb, NULL /* inode */, 881177cc0e7SEric Biggers NULL /* block_bh */, acl_size, 882177cc0e7SEric Biggers true /* is_create */); 883177cc0e7SEric Biggers posix_acl_release(p); 884177cc0e7SEric Biggers } 885177cc0e7SEric Biggers #endif 886177cc0e7SEric Biggers 887177cc0e7SEric Biggers #ifdef CONFIG_SECURITY 888177cc0e7SEric Biggers { 889177cc0e7SEric Biggers int num_security_xattrs = 1; 890177cc0e7SEric Biggers 891177cc0e7SEric Biggers #ifdef CONFIG_INTEGRITY 892177cc0e7SEric Biggers num_security_xattrs++; 893177cc0e7SEric Biggers #endif 894177cc0e7SEric Biggers /* 895177cc0e7SEric Biggers * We assume that security xattrs are never more than 1k. 896177cc0e7SEric Biggers * In practice they are under 128 bytes. 897177cc0e7SEric Biggers */ 898177cc0e7SEric Biggers nblocks += num_security_xattrs * 899177cc0e7SEric Biggers __ext4_xattr_set_credits(sb, NULL /* inode */, 900177cc0e7SEric Biggers NULL /* block_bh */, 1024, 901177cc0e7SEric Biggers true /* is_create */); 902177cc0e7SEric Biggers } 903177cc0e7SEric Biggers #endif 904177cc0e7SEric Biggers if (encrypt) 905177cc0e7SEric Biggers nblocks += __ext4_xattr_set_credits(sb, 906177cc0e7SEric Biggers NULL /* inode */, 907177cc0e7SEric Biggers NULL /* block_bh */, 908177cc0e7SEric Biggers FSCRYPT_SET_CONTEXT_MAX_SIZE, 909177cc0e7SEric Biggers true /* is_create */); 910177cc0e7SEric Biggers return nblocks; 911177cc0e7SEric Biggers } 912177cc0e7SEric Biggers 91319883bd9STheodore Ts'o /* 914ac27a0ecSDave Kleikamp * There are two policies for allocating an inode. If the new inode is 915ac27a0ecSDave Kleikamp * a directory, then a forward search is made for a block group with both 916ac27a0ecSDave Kleikamp * free space and a low directory-to-inode ratio; if that fails, then of 917ac27a0ecSDave Kleikamp * the groups with above-average free space, that group with the fewest 918ac27a0ecSDave Kleikamp * directories already is chosen. 919ac27a0ecSDave Kleikamp * 920ac27a0ecSDave Kleikamp * For other inodes, search forward from the parent directory's block 921ac27a0ecSDave Kleikamp * group to find a free inode. 922ac27a0ecSDave Kleikamp */ 92314f3db55SChristian Brauner struct inode *__ext4_new_inode(struct user_namespace *mnt_userns, 92414f3db55SChristian Brauner handle_t *handle, struct inode *dir, 9251139575aSTheodore Ts'o umode_t mode, const struct qstr *qstr, 9261b917ed8STahsin Erdogan __u32 goal, uid_t *owner, __u32 i_flags, 9271b917ed8STahsin Erdogan int handle_type, unsigned int line_no, 9281b917ed8STahsin Erdogan int nblocks) 929ac27a0ecSDave Kleikamp { 930ac27a0ecSDave Kleikamp struct super_block *sb; 9313300bedaSAneesh Kumar K.V struct buffer_head *inode_bitmap_bh = NULL; 9323300bedaSAneesh Kumar K.V struct buffer_head *group_desc_bh; 9338df9675fSTheodore Ts'o ext4_group_t ngroups, group = 0; 934ac27a0ecSDave Kleikamp unsigned long ino = 0; 935ac27a0ecSDave Kleikamp struct inode *inode; 936617ba13bSMingming Cao struct ext4_group_desc *gdp = NULL; 937617ba13bSMingming Cao struct ext4_inode_info *ei; 938617ba13bSMingming Cao struct ext4_sb_info *sbi; 939a7cdadeeSJan Kara int ret2, err; 940ac27a0ecSDave Kleikamp struct inode *ret; 9412aa9fc4cSAvantika Mathur ext4_group_t i; 942772cb7c8SJose R. Santos ext4_group_t flex_group; 9438016e29fSHarshad Shirwadkar struct ext4_group_info *grp = NULL; 94402ce5316SEric Biggers bool encrypt = false; 945ac27a0ecSDave Kleikamp 946ac27a0ecSDave Kleikamp /* Cannot create files in a deleted directory */ 947ac27a0ecSDave Kleikamp if (!dir || !dir->i_nlink) 948ac27a0ecSDave Kleikamp return ERR_PTR(-EPERM); 949ac27a0ecSDave Kleikamp 950af65207cSTahsin Erdogan sb = dir->i_sb; 951af65207cSTahsin Erdogan sbi = EXT4_SB(sb); 952af65207cSTahsin Erdogan 953af65207cSTahsin Erdogan if (unlikely(ext4_forced_shutdown(sbi))) 9540db1ff22STheodore Ts'o return ERR_PTR(-EIO); 9550db1ff22STheodore Ts'o 9568df9675fSTheodore Ts'o ngroups = ext4_get_groups_count(sb); 9579bffad1eSTheodore Ts'o trace_ext4_request_inode(dir, mode); 958ac27a0ecSDave Kleikamp inode = new_inode(sb); 959ac27a0ecSDave Kleikamp if (!inode) 960ac27a0ecSDave Kleikamp return ERR_PTR(-ENOMEM); 961617ba13bSMingming Cao ei = EXT4_I(inode); 962772cb7c8SJose R. Santos 963eb9cc7e1SJan Kara /* 964b8a07463SAdam Buchbinder * Initialize owners and quota early so that we don't have to account 965eb9cc7e1SJan Kara * for quota initialization worst case in standard inode creating 966eb9cc7e1SJan Kara * transaction 967eb9cc7e1SJan Kara */ 968eb9cc7e1SJan Kara if (owner) { 969eb9cc7e1SJan Kara inode->i_mode = mode; 970eb9cc7e1SJan Kara i_uid_write(inode, owner[0]); 971eb9cc7e1SJan Kara i_gid_write(inode, owner[1]); 972eb9cc7e1SJan Kara } else if (test_opt(sb, GRPID)) { 973eb9cc7e1SJan Kara inode->i_mode = mode; 974db998553SChristian Brauner inode_fsuid_set(inode, mnt_userns); 975eb9cc7e1SJan Kara inode->i_gid = dir->i_gid; 976eb9cc7e1SJan Kara } else 97714f3db55SChristian Brauner inode_init_owner(mnt_userns, inode, dir, mode); 978040cb378SLi Xi 9790b7b7779SKaho Ng if (ext4_has_feature_project(sb) && 980040cb378SLi Xi ext4_test_inode_flag(dir, EXT4_INODE_PROJINHERIT)) 981040cb378SLi Xi ei->i_projid = EXT4_I(dir)->i_projid; 982040cb378SLi Xi else 983040cb378SLi Xi ei->i_projid = make_kprojid(&init_user_ns, EXT4_DEF_PROJID); 984040cb378SLi Xi 98502ce5316SEric Biggers if (!(i_flags & EXT4_EA_INODE_FL)) { 98602ce5316SEric Biggers err = fscrypt_prepare_new_inode(dir, inode, &encrypt); 98702ce5316SEric Biggers if (err) 98802ce5316SEric Biggers goto out; 98902ce5316SEric Biggers } 99002ce5316SEric Biggers 991a7cdadeeSJan Kara err = dquot_initialize(inode); 992a7cdadeeSJan Kara if (err) 993a7cdadeeSJan Kara goto out; 994eb9cc7e1SJan Kara 99502ce5316SEric Biggers if (!handle && sbi->s_journal && !(i_flags & EXT4_EA_INODE_FL)) { 99602ce5316SEric Biggers ret2 = ext4_xattr_credits_for_new_inode(dir, mode, encrypt); 99702ce5316SEric Biggers if (ret2 < 0) { 99802ce5316SEric Biggers err = ret2; 99902ce5316SEric Biggers goto out; 100002ce5316SEric Biggers } 100102ce5316SEric Biggers nblocks += ret2; 100202ce5316SEric Biggers } 100302ce5316SEric Biggers 100411013911SAndreas Dilger if (!goal) 100511013911SAndreas Dilger goal = sbi->s_inode_goal; 100611013911SAndreas Dilger 1007e6462869SJohann Lombardi if (goal && goal <= le32_to_cpu(sbi->s_es->s_inodes_count)) { 100811013911SAndreas Dilger group = (goal - 1) / EXT4_INODES_PER_GROUP(sb); 100911013911SAndreas Dilger ino = (goal - 1) % EXT4_INODES_PER_GROUP(sb); 101011013911SAndreas Dilger ret2 = 0; 101111013911SAndreas Dilger goto got_group; 101211013911SAndreas Dilger } 101311013911SAndreas Dilger 10144113c4caSLukas Czerner if (S_ISDIR(mode)) 1015f157a4aaSTheodore Ts'o ret2 = find_group_orlov(sb, dir, &group, mode, qstr); 10164113c4caSLukas Czerner else 1017a4912123STheodore Ts'o ret2 = find_group_other(sb, dir, &group, mode); 1018ac27a0ecSDave Kleikamp 1019772cb7c8SJose R. Santos got_group: 1020a4912123STheodore Ts'o EXT4_I(dir)->i_last_alloc_group = group; 1021ac27a0ecSDave Kleikamp err = -ENOSPC; 10222aa9fc4cSAvantika Mathur if (ret2 == -1) 1023ac27a0ecSDave Kleikamp goto out; 1024ac27a0ecSDave Kleikamp 1025119c0d44STheodore Ts'o /* 1026119c0d44STheodore Ts'o * Normally we will only go through one pass of this loop, 1027119c0d44STheodore Ts'o * unless we get unlucky and it turns out the group we selected 1028119c0d44STheodore Ts'o * had its last inode grabbed by someone else. 1029119c0d44STheodore Ts'o */ 103011013911SAndreas Dilger for (i = 0; i < ngroups; i++, ino = 0) { 1031ac27a0ecSDave Kleikamp err = -EIO; 1032ac27a0ecSDave Kleikamp 10333300bedaSAneesh Kumar K.V gdp = ext4_get_group_desc(sb, group, &group_desc_bh); 1034ac27a0ecSDave Kleikamp if (!gdp) 1035eb9cc7e1SJan Kara goto out; 1036ac27a0ecSDave Kleikamp 1037f2a09af6SYongqiang Yang /* 1038f2a09af6SYongqiang Yang * Check free inodes count before loading bitmap. 1039f2a09af6SYongqiang Yang */ 10402fe435d8SWang Shilong if (ext4_free_inodes_count(sb, gdp) == 0) 10412fe435d8SWang Shilong goto next_group; 1042f2a09af6SYongqiang Yang 10438016e29fSHarshad Shirwadkar if (!(sbi->s_mount_state & EXT4_FC_REPLAY)) { 104487a39389SDarrick J. Wong grp = ext4_get_group_info(sb, group); 10458016e29fSHarshad Shirwadkar /* 10468016e29fSHarshad Shirwadkar * Skip groups with already-known suspicious inode 10478016e29fSHarshad Shirwadkar * tables 10488016e29fSHarshad Shirwadkar */ 10492fe435d8SWang Shilong if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) 10502fe435d8SWang Shilong goto next_group; 10518016e29fSHarshad Shirwadkar } 105287a39389SDarrick J. Wong 10533300bedaSAneesh Kumar K.V brelse(inode_bitmap_bh); 10543300bedaSAneesh Kumar K.V inode_bitmap_bh = ext4_read_inode_bitmap(sb, group); 105587a39389SDarrick J. Wong /* Skip groups with suspicious inode tables */ 10568016e29fSHarshad Shirwadkar if (((!(sbi->s_mount_state & EXT4_FC_REPLAY)) 10578016e29fSHarshad Shirwadkar && EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) || 10589008a58eSDarrick J. Wong IS_ERR(inode_bitmap_bh)) { 10599008a58eSDarrick J. Wong inode_bitmap_bh = NULL; 10602fe435d8SWang Shilong goto next_group; 106187a39389SDarrick J. Wong } 1062ac27a0ecSDave Kleikamp 1063ac27a0ecSDave Kleikamp repeat_in_this_group: 1064901ed070SWang Shilong ret2 = find_inode_bit(sb, group, inode_bitmap_bh, &ino); 1065901ed070SWang Shilong if (!ret2) 1066a34eb503STheodore Ts'o goto next_group; 1067901ed070SWang Shilong 1068119c0d44STheodore Ts'o if (group == 0 && (ino + 1) < EXT4_FIRST_INO(sb)) { 1069119c0d44STheodore Ts'o ext4_error(sb, "reserved inode found cleared - " 1070119c0d44STheodore Ts'o "inode=%lu", ino + 1); 1071206f6d55SWang Shilong ext4_mark_group_bitmap_corrupted(sb, group, 1072206f6d55SWang Shilong EXT4_GROUP_INFO_IBITMAP_CORRUPT); 10732fe435d8SWang Shilong goto next_group; 1074119c0d44STheodore Ts'o } 1075901ed070SWang Shilong 10768016e29fSHarshad Shirwadkar if ((!(sbi->s_mount_state & EXT4_FC_REPLAY)) && !handle) { 10771139575aSTheodore Ts'o BUG_ON(nblocks <= 0); 10781139575aSTheodore Ts'o handle = __ext4_journal_start_sb(dir->i_sb, line_no, 1079a70fd5acSyangerkun handle_type, nblocks, 0, 1080a70fd5acSyangerkun ext4_trans_default_revoke_credits(sb)); 10811139575aSTheodore Ts'o if (IS_ERR(handle)) { 10821139575aSTheodore Ts'o err = PTR_ERR(handle); 1083eb9cc7e1SJan Kara ext4_std_error(sb, err); 1084eb9cc7e1SJan Kara goto out; 10851139575aSTheodore Ts'o } 10861139575aSTheodore Ts'o } 1087ffb5387eSEric Sandeen BUFFER_TRACE(inode_bitmap_bh, "get_write_access"); 1088ffb5387eSEric Sandeen err = ext4_journal_get_write_access(handle, inode_bitmap_bh); 1089eb9cc7e1SJan Kara if (err) { 1090eb9cc7e1SJan Kara ext4_std_error(sb, err); 1091eb9cc7e1SJan Kara goto out; 1092eb9cc7e1SJan Kara } 1093119c0d44STheodore Ts'o ext4_lock_group(sb, group); 1094119c0d44STheodore Ts'o ret2 = ext4_test_and_set_bit(ino, inode_bitmap_bh->b_data); 1095901ed070SWang Shilong if (ret2) { 1096901ed070SWang Shilong /* Someone already took the bit. Repeat the search 1097901ed070SWang Shilong * with lock held. 1098901ed070SWang Shilong */ 1099901ed070SWang Shilong ret2 = find_inode_bit(sb, group, inode_bitmap_bh, &ino); 1100901ed070SWang Shilong if (ret2) { 1101901ed070SWang Shilong ext4_set_bit(ino, inode_bitmap_bh->b_data); 1102901ed070SWang Shilong ret2 = 0; 1103901ed070SWang Shilong } else { 1104901ed070SWang Shilong ret2 = 1; /* we didn't grab the inode */ 1105901ed070SWang Shilong } 1106901ed070SWang Shilong } 1107119c0d44STheodore Ts'o ext4_unlock_group(sb, group); 1108119c0d44STheodore Ts'o ino++; /* the inode bitmap is zero-based */ 1109119c0d44STheodore Ts'o if (!ret2) 1110119c0d44STheodore Ts'o goto got; /* we grabbed the inode! */ 1111901ed070SWang Shilong 1112119c0d44STheodore Ts'o if (ino < EXT4_INODES_PER_GROUP(sb)) 1113119c0d44STheodore Ts'o goto repeat_in_this_group; 1114a34eb503STheodore Ts'o next_group: 1115a34eb503STheodore Ts'o if (++group == ngroups) 1116a34eb503STheodore Ts'o group = 0; 1117ac27a0ecSDave Kleikamp } 1118ac27a0ecSDave Kleikamp err = -ENOSPC; 1119ac27a0ecSDave Kleikamp goto out; 1120ac27a0ecSDave Kleikamp 1121ac27a0ecSDave Kleikamp got: 1122ffb5387eSEric Sandeen BUFFER_TRACE(inode_bitmap_bh, "call ext4_handle_dirty_metadata"); 1123ffb5387eSEric Sandeen err = ext4_handle_dirty_metadata(handle, NULL, inode_bitmap_bh); 1124eb9cc7e1SJan Kara if (err) { 1125eb9cc7e1SJan Kara ext4_std_error(sb, err); 1126eb9cc7e1SJan Kara goto out; 1127eb9cc7e1SJan Kara } 1128ffb5387eSEric Sandeen 112961c219f5STheodore Ts'o BUFFER_TRACE(group_desc_bh, "get_write_access"); 113061c219f5STheodore Ts'o err = ext4_journal_get_write_access(handle, group_desc_bh); 113161c219f5STheodore Ts'o if (err) { 113261c219f5STheodore Ts'o ext4_std_error(sb, err); 113361c219f5STheodore Ts'o goto out; 113461c219f5STheodore Ts'o } 113561c219f5STheodore Ts'o 1136717d50e4SAndreas Dilger /* We may have to initialize the block bitmap if it isn't already */ 1137feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 1138717d50e4SAndreas Dilger gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { 11393300bedaSAneesh Kumar K.V struct buffer_head *block_bitmap_bh; 1140717d50e4SAndreas Dilger 11413300bedaSAneesh Kumar K.V block_bitmap_bh = ext4_read_block_bitmap(sb, group); 11429008a58eSDarrick J. Wong if (IS_ERR(block_bitmap_bh)) { 11439008a58eSDarrick J. Wong err = PTR_ERR(block_bitmap_bh); 1144599a9b77SJan Kara goto out; 1145599a9b77SJan Kara } 11463300bedaSAneesh Kumar K.V BUFFER_TRACE(block_bitmap_bh, "get block bitmap access"); 11473300bedaSAneesh Kumar K.V err = ext4_journal_get_write_access(handle, block_bitmap_bh); 1148717d50e4SAndreas Dilger if (err) { 11493300bedaSAneesh Kumar K.V brelse(block_bitmap_bh); 1150eb9cc7e1SJan Kara ext4_std_error(sb, err); 1151eb9cc7e1SJan Kara goto out; 1152717d50e4SAndreas Dilger } 1153717d50e4SAndreas Dilger 1154fd034a84STheodore Ts'o BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap"); 1155fd034a84STheodore Ts'o err = ext4_handle_dirty_metadata(handle, NULL, block_bitmap_bh); 1156fd034a84STheodore Ts'o 1157717d50e4SAndreas Dilger /* recheck and clear flag under lock if we still need to */ 1158fd034a84STheodore Ts'o ext4_lock_group(sb, group); 11598844618dSTheodore Ts'o if (ext4_has_group_desc_csum(sb) && 11608844618dSTheodore Ts'o (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))) { 11613300bedaSAneesh Kumar K.V gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT); 1162021b65bbSTheodore Ts'o ext4_free_group_clusters_set(sb, gdp, 1163cff1dfd7STheodore Ts'o ext4_free_clusters_after_init(sb, group, gdp)); 1164fa77dcfaSDarrick J. Wong ext4_block_bitmap_csum_set(sb, group, gdp, 116579f1ba49STao Ma block_bitmap_bh); 1166feb0ab32SDarrick J. Wong ext4_group_desc_csum_set(sb, group, gdp); 1167717d50e4SAndreas Dilger } 1168955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, group); 1169aeb1e5d6STheodore Ts'o brelse(block_bitmap_bh); 1170717d50e4SAndreas Dilger 1171eb9cc7e1SJan Kara if (err) { 1172eb9cc7e1SJan Kara ext4_std_error(sb, err); 1173eb9cc7e1SJan Kara goto out; 1174eb9cc7e1SJan Kara } 1175717d50e4SAndreas Dilger } 1176119c0d44STheodore Ts'o 1177119c0d44STheodore Ts'o /* Update the relevant bg descriptor fields */ 117841a246d1SDarrick J. Wong if (ext4_has_group_desc_csum(sb)) { 1179119c0d44STheodore Ts'o int free; 11808016e29fSHarshad Shirwadkar struct ext4_group_info *grp = NULL; 1181119c0d44STheodore Ts'o 11828016e29fSHarshad Shirwadkar if (!(sbi->s_mount_state & EXT4_FC_REPLAY)) { 11838016e29fSHarshad Shirwadkar grp = ext4_get_group_info(sb, group); 11848016e29fSHarshad Shirwadkar down_read(&grp->alloc_sem); /* 11858016e29fSHarshad Shirwadkar * protect vs itable 11868016e29fSHarshad Shirwadkar * lazyinit 11878016e29fSHarshad Shirwadkar */ 11888016e29fSHarshad Shirwadkar } 1189119c0d44STheodore Ts'o ext4_lock_group(sb, group); /* while we modify the bg desc */ 1190119c0d44STheodore Ts'o free = EXT4_INODES_PER_GROUP(sb) - 1191119c0d44STheodore Ts'o ext4_itable_unused_count(sb, gdp); 1192119c0d44STheodore Ts'o if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { 1193119c0d44STheodore Ts'o gdp->bg_flags &= cpu_to_le16(~EXT4_BG_INODE_UNINIT); 1194119c0d44STheodore Ts'o free = 0; 1195119c0d44STheodore Ts'o } 1196119c0d44STheodore Ts'o /* 1197119c0d44STheodore Ts'o * Check the relative inode number against the last used 1198119c0d44STheodore Ts'o * relative inode number in this group. if it is greater 1199119c0d44STheodore Ts'o * we need to update the bg_itable_unused count 1200119c0d44STheodore Ts'o */ 1201119c0d44STheodore Ts'o if (ino > free) 1202119c0d44STheodore Ts'o ext4_itable_unused_set(sb, gdp, 1203119c0d44STheodore Ts'o (EXT4_INODES_PER_GROUP(sb) - ino)); 12048016e29fSHarshad Shirwadkar if (!(sbi->s_mount_state & EXT4_FC_REPLAY)) 1205119c0d44STheodore Ts'o up_read(&grp->alloc_sem); 12066f2e9f0eSTao Ma } else { 12076f2e9f0eSTao Ma ext4_lock_group(sb, group); 1208119c0d44STheodore Ts'o } 12096f2e9f0eSTao Ma 1210119c0d44STheodore Ts'o ext4_free_inodes_set(sb, gdp, ext4_free_inodes_count(sb, gdp) - 1); 1211119c0d44STheodore Ts'o if (S_ISDIR(mode)) { 1212119c0d44STheodore Ts'o ext4_used_dirs_set(sb, gdp, ext4_used_dirs_count(sb, gdp) + 1); 1213119c0d44STheodore Ts'o if (sbi->s_log_groups_per_flex) { 1214119c0d44STheodore Ts'o ext4_group_t f = ext4_flex_group(sbi, group); 1215119c0d44STheodore Ts'o 12167c990728SSuraj Jitindar Singh atomic_inc(&sbi_array_rcu_deref(sbi, s_flex_groups, 12177c990728SSuraj Jitindar Singh f)->used_dirs); 1218119c0d44STheodore Ts'o } 1219119c0d44STheodore Ts'o } 122041a246d1SDarrick J. Wong if (ext4_has_group_desc_csum(sb)) { 122141a246d1SDarrick J. Wong ext4_inode_bitmap_csum_set(sb, group, gdp, inode_bitmap_bh, 122241a246d1SDarrick J. Wong EXT4_INODES_PER_GROUP(sb) / 8); 1223feb0ab32SDarrick J. Wong ext4_group_desc_csum_set(sb, group, gdp); 1224119c0d44STheodore Ts'o } 12256f2e9f0eSTao Ma ext4_unlock_group(sb, group); 1226119c0d44STheodore Ts'o 12273300bedaSAneesh Kumar K.V BUFFER_TRACE(group_desc_bh, "call ext4_handle_dirty_metadata"); 12283300bedaSAneesh Kumar K.V err = ext4_handle_dirty_metadata(handle, NULL, group_desc_bh); 1229eb9cc7e1SJan Kara if (err) { 1230eb9cc7e1SJan Kara ext4_std_error(sb, err); 1231eb9cc7e1SJan Kara goto out; 1232eb9cc7e1SJan Kara } 1233ac27a0ecSDave Kleikamp 1234ac27a0ecSDave Kleikamp percpu_counter_dec(&sbi->s_freeinodes_counter); 1235ac27a0ecSDave Kleikamp if (S_ISDIR(mode)) 1236ac27a0ecSDave Kleikamp percpu_counter_inc(&sbi->s_dirs_counter); 1237ac27a0ecSDave Kleikamp 1238772cb7c8SJose R. Santos if (sbi->s_log_groups_per_flex) { 1239772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, group); 12407c990728SSuraj Jitindar Singh atomic_dec(&sbi_array_rcu_deref(sbi, s_flex_groups, 12417c990728SSuraj Jitindar Singh flex_group)->free_inodes); 1242772cb7c8SJose R. Santos } 1243ac27a0ecSDave Kleikamp 1244717d50e4SAndreas Dilger inode->i_ino = ino + group * EXT4_INODES_PER_GROUP(sb); 1245ac27a0ecSDave Kleikamp /* This is the optimal IO size (for stat), not the fs block size */ 1246ac27a0ecSDave Kleikamp inode->i_blocks = 0; 124795582b00SDeepa Dinamani inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); 12487b62b293SArnd Bergmann ei->i_crtime = inode->i_mtime; 1249ac27a0ecSDave Kleikamp 1250ac27a0ecSDave Kleikamp memset(ei->i_data, 0, sizeof(ei->i_data)); 1251ac27a0ecSDave Kleikamp ei->i_dir_start_lookup = 0; 1252ac27a0ecSDave Kleikamp ei->i_disksize = 0; 1253ac27a0ecSDave Kleikamp 12544af83508SEryu Guan /* Don't inherit extent flag from directory, amongst others. */ 12552dc6b0d4SDuane Griffin ei->i_flags = 12562dc6b0d4SDuane Griffin ext4_mask_flags(mode, EXT4_I(dir)->i_flags & EXT4_FL_INHERITED); 12571b917ed8STahsin Erdogan ei->i_flags |= i_flags; 1258ac27a0ecSDave Kleikamp ei->i_file_acl = 0; 1259ac27a0ecSDave Kleikamp ei->i_dtime = 0; 1260ac27a0ecSDave Kleikamp ei->i_block_group = group; 1261a4912123STheodore Ts'o ei->i_last_alloc_group = ~0; 1262ac27a0ecSDave Kleikamp 1263043546e4SIra Weiny ext4_set_inode_flags(inode, true); 1264ac27a0ecSDave Kleikamp if (IS_DIRSYNC(inode)) 12650390131bSFrank Mayhar ext4_handle_sync(handle); 12666b38e842SAl Viro if (insert_inode_locked(inode) < 0) { 1267acd6ad83SJan Kara /* 1268acd6ad83SJan Kara * Likely a bitmap corruption causing inode to be allocated 1269acd6ad83SJan Kara * twice. 1270acd6ad83SJan Kara */ 1271acd6ad83SJan Kara err = -EIO; 1272eb9cc7e1SJan Kara ext4_error(sb, "failed to insert inode %lu: doubly allocated?", 1273eb9cc7e1SJan Kara inode->i_ino); 1274206f6d55SWang Shilong ext4_mark_group_bitmap_corrupted(sb, group, 1275206f6d55SWang Shilong EXT4_GROUP_INFO_IBITMAP_CORRUPT); 1276eb9cc7e1SJan Kara goto out; 12776b38e842SAl Viro } 127823253068STheodore Ts'o inode->i_generation = prandom_u32(); 1279ac27a0ecSDave Kleikamp 1280814525f4SDarrick J. Wong /* Precompute checksum seed for inode metadata */ 12819aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 1282814525f4SDarrick J. Wong __u32 csum; 1283814525f4SDarrick J. Wong __le32 inum = cpu_to_le32(inode->i_ino); 1284814525f4SDarrick J. Wong __le32 gen = cpu_to_le32(inode->i_generation); 1285814525f4SDarrick J. Wong csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, 1286814525f4SDarrick J. Wong sizeof(inum)); 1287814525f4SDarrick J. Wong ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, 1288814525f4SDarrick J. Wong sizeof(gen)); 1289814525f4SDarrick J. Wong } 1290814525f4SDarrick J. Wong 1291353eb83cSTheodore Ts'o ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */ 129219f5fb7aSTheodore Ts'o ext4_set_inode_state(inode, EXT4_STATE_NEW); 1293ef7f3835SKalpak Shah 129449598e04SJun Piao ei->i_extra_isize = sbi->s_want_extra_isize; 1295f08225d1STao Ma ei->i_inline_off = 0; 12964811d992STheodore Ts'o if (ext4_has_feature_inline_data(sb) && 12974811d992STheodore Ts'o (!(ei->i_flags & EXT4_DAX_FL) || S_ISDIR(mode))) 1298f08225d1STao Ma ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); 1299ac27a0ecSDave Kleikamp ret = inode; 130063936ddaSChristoph Hellwig err = dquot_alloc_inode(inode); 130163936ddaSChristoph Hellwig if (err) 1302ac27a0ecSDave Kleikamp goto fail_drop; 1303ac27a0ecSDave Kleikamp 1304aa1dca3bSEric Biggers /* 1305aa1dca3bSEric Biggers * Since the encryption xattr will always be unique, create it first so 1306aa1dca3bSEric Biggers * that it's less likely to end up in an external xattr block and 1307aa1dca3bSEric Biggers * prevent its deduplication. 1308aa1dca3bSEric Biggers */ 1309aa1dca3bSEric Biggers if (encrypt) { 131002ce5316SEric Biggers err = fscrypt_set_context(inode, handle); 1311aa1dca3bSEric Biggers if (err) 1312aa1dca3bSEric Biggers goto fail_free_drop; 1313aa1dca3bSEric Biggers } 1314aa1dca3bSEric Biggers 13151b917ed8STahsin Erdogan if (!(ei->i_flags & EXT4_EA_INODE_FL)) { 1316617ba13bSMingming Cao err = ext4_init_acl(handle, inode, dir); 1317ac27a0ecSDave Kleikamp if (err) 1318ac27a0ecSDave Kleikamp goto fail_free_drop; 1319ac27a0ecSDave Kleikamp 13202a7dba39SEric Paris err = ext4_init_security(handle, inode, dir, qstr); 1321ac27a0ecSDave Kleikamp if (err) 1322ac27a0ecSDave Kleikamp goto fail_free_drop; 1323ad47f953STahsin Erdogan } 1324ac27a0ecSDave Kleikamp 1325e2b911c5SDarrick J. Wong if (ext4_has_feature_extents(sb)) { 1326e4079a11SEric Sandeen /* set extent flag only for directory, file and normal symlink*/ 1327e65187e6SAneesh Kumar K.V if (S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) { 132812e9b892SDmitry Monakhov ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS); 1329a86c6181SAlex Tomas ext4_ext_tree_init(handle, inode); 1330a86c6181SAlex Tomas } 133142bf0383SAneesh Kumar K.V } 1332ac27a0ecSDave Kleikamp 1333688f869cSTheodore Ts'o if (ext4_handle_valid(handle)) { 1334688f869cSTheodore Ts'o ei->i_sync_tid = handle->h_transaction->t_tid; 1335688f869cSTheodore Ts'o ei->i_datasync_tid = handle->h_transaction->t_tid; 1336688f869cSTheodore Ts'o } 1337688f869cSTheodore Ts'o 13388753e88fSAneesh Kumar K.V err = ext4_mark_inode_dirty(handle, inode); 13398753e88fSAneesh Kumar K.V if (err) { 13408753e88fSAneesh Kumar K.V ext4_std_error(sb, err); 13418753e88fSAneesh Kumar K.V goto fail_free_drop; 13428753e88fSAneesh Kumar K.V } 13438753e88fSAneesh Kumar K.V 1344617ba13bSMingming Cao ext4_debug("allocating inode %lu\n", inode->i_ino); 13459bffad1eSTheodore Ts'o trace_ext4_allocate_inode(inode, dir, mode); 13463300bedaSAneesh Kumar K.V brelse(inode_bitmap_bh); 1347ac27a0ecSDave Kleikamp return ret; 1348ac27a0ecSDave Kleikamp 1349ac27a0ecSDave Kleikamp fail_free_drop: 135063936ddaSChristoph Hellwig dquot_free_inode(inode); 1351ac27a0ecSDave Kleikamp fail_drop: 13526d6b77f1SMiklos Szeredi clear_nlink(inode); 13536b38e842SAl Viro unlock_new_inode(inode); 1354eb9cc7e1SJan Kara out: 1355eb9cc7e1SJan Kara dquot_drop(inode); 1356eb9cc7e1SJan Kara inode->i_flags |= S_NOQUOTA; 1357ac27a0ecSDave Kleikamp iput(inode); 13583300bedaSAneesh Kumar K.V brelse(inode_bitmap_bh); 1359ac27a0ecSDave Kleikamp return ERR_PTR(err); 1360ac27a0ecSDave Kleikamp } 1361ac27a0ecSDave Kleikamp 1362ac27a0ecSDave Kleikamp /* Verify that we are loading a valid orphan from disk */ 1363617ba13bSMingming Cao struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino) 1364ac27a0ecSDave Kleikamp { 1365617ba13bSMingming Cao unsigned long max_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count); 1366fd2d4291SAvantika Mathur ext4_group_t block_group; 1367ac27a0ecSDave Kleikamp int bit; 13687827a7f6STheodore Ts'o struct buffer_head *bitmap_bh = NULL; 1369ac27a0ecSDave Kleikamp struct inode *inode = NULL; 13707827a7f6STheodore Ts'o int err = -EFSCORRUPTED; 1371ac27a0ecSDave Kleikamp 13727827a7f6STheodore Ts'o if (ino < EXT4_FIRST_INO(sb) || ino > max_ino) 13737827a7f6STheodore Ts'o goto bad_orphan; 1374ac27a0ecSDave Kleikamp 1375617ba13bSMingming Cao block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); 1376617ba13bSMingming Cao bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); 1377e29d1cdeSEric Sandeen bitmap_bh = ext4_read_inode_bitmap(sb, block_group); 1378206f6d55SWang Shilong if (IS_ERR(bitmap_bh)) 1379e884bce1SAl Viro return ERR_CAST(bitmap_bh); 1380ac27a0ecSDave Kleikamp 1381ac27a0ecSDave Kleikamp /* Having the inode bit set should be a 100% indicator that this 1382ac27a0ecSDave Kleikamp * is a valid orphan (no e2fsck run on fs). Orphans also include 1383ac27a0ecSDave Kleikamp * inodes that were being truncated, so we can't check i_nlink==0. 1384ac27a0ecSDave Kleikamp */ 13851d1fe1eeSDavid Howells if (!ext4_test_bit(bit, bitmap_bh->b_data)) 13861d1fe1eeSDavid Howells goto bad_orphan; 13871d1fe1eeSDavid Howells 13888a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_NORMAL); 13897827a7f6STheodore Ts'o if (IS_ERR(inode)) { 13907827a7f6STheodore Ts'o err = PTR_ERR(inode); 139154d3adbcSTheodore Ts'o ext4_error_err(sb, -err, 139254d3adbcSTheodore Ts'o "couldn't read orphan inode %lu (err %d)", 13937827a7f6STheodore Ts'o ino, err); 13943bbd0ef2SXiyu Yang brelse(bitmap_bh); 13957827a7f6STheodore Ts'o return inode; 13967827a7f6STheodore Ts'o } 13971d1fe1eeSDavid Howells 139891ef4cafSDuane Griffin /* 1399c9eb13a9STheodore Ts'o * If the orphans has i_nlinks > 0 then it should be able to 1400c9eb13a9STheodore Ts'o * be truncated, otherwise it won't be removed from the orphan 1401c9eb13a9STheodore Ts'o * list during processing and an infinite loop will result. 1402c9eb13a9STheodore Ts'o * Similarly, it must not be a bad inode. 140391ef4cafSDuane Griffin */ 1404c9eb13a9STheodore Ts'o if ((inode->i_nlink && !ext4_can_truncate(inode)) || 1405c9eb13a9STheodore Ts'o is_bad_inode(inode)) 140691ef4cafSDuane Griffin goto bad_orphan; 140791ef4cafSDuane Griffin 14081d1fe1eeSDavid Howells if (NEXT_ORPHAN(inode) > max_ino) 14091d1fe1eeSDavid Howells goto bad_orphan; 14101d1fe1eeSDavid Howells brelse(bitmap_bh); 14111d1fe1eeSDavid Howells return inode; 14121d1fe1eeSDavid Howells 14131d1fe1eeSDavid Howells bad_orphan: 14147827a7f6STheodore Ts'o ext4_error(sb, "bad orphan inode %lu", ino); 14157827a7f6STheodore Ts'o if (bitmap_bh) 14167827a7f6STheodore Ts'o printk(KERN_ERR "ext4_test_bit(bit=%d, block=%llu) = %d\n", 1417ac27a0ecSDave Kleikamp bit, (unsigned long long)bitmap_bh->b_blocknr, 1418617ba13bSMingming Cao ext4_test_bit(bit, bitmap_bh->b_data)); 1419ac27a0ecSDave Kleikamp if (inode) { 14207827a7f6STheodore Ts'o printk(KERN_ERR "is_bad_inode(inode)=%d\n", 1421ac27a0ecSDave Kleikamp is_bad_inode(inode)); 14227827a7f6STheodore Ts'o printk(KERN_ERR "NEXT_ORPHAN(inode)=%u\n", 1423ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 14247827a7f6STheodore Ts'o printk(KERN_ERR "max_ino=%lu\n", max_ino); 14257827a7f6STheodore Ts'o printk(KERN_ERR "i_nlink=%u\n", inode->i_nlink); 1426ac27a0ecSDave Kleikamp /* Avoid freeing blocks if we got a bad deleted inode */ 14271d1fe1eeSDavid Howells if (inode->i_nlink == 0) 1428ac27a0ecSDave Kleikamp inode->i_blocks = 0; 1429ac27a0ecSDave Kleikamp iput(inode); 1430ac27a0ecSDave Kleikamp } 1431ac27a0ecSDave Kleikamp brelse(bitmap_bh); 14321d1fe1eeSDavid Howells return ERR_PTR(err); 1433ac27a0ecSDave Kleikamp } 1434ac27a0ecSDave Kleikamp 1435617ba13bSMingming Cao unsigned long ext4_count_free_inodes(struct super_block *sb) 1436ac27a0ecSDave Kleikamp { 1437ac27a0ecSDave Kleikamp unsigned long desc_count; 1438617ba13bSMingming Cao struct ext4_group_desc *gdp; 14398df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 1440617ba13bSMingming Cao #ifdef EXT4FS_DEBUG 1441617ba13bSMingming Cao struct ext4_super_block *es; 1442ac27a0ecSDave Kleikamp unsigned long bitmap_count, x; 1443ac27a0ecSDave Kleikamp struct buffer_head *bitmap_bh = NULL; 1444ac27a0ecSDave Kleikamp 1445617ba13bSMingming Cao es = EXT4_SB(sb)->s_es; 1446ac27a0ecSDave Kleikamp desc_count = 0; 1447ac27a0ecSDave Kleikamp bitmap_count = 0; 1448ac27a0ecSDave Kleikamp gdp = NULL; 14498df9675fSTheodore Ts'o for (i = 0; i < ngroups; i++) { 1450617ba13bSMingming Cao gdp = ext4_get_group_desc(sb, i, NULL); 1451ac27a0ecSDave Kleikamp if (!gdp) 1452ac27a0ecSDave Kleikamp continue; 1453560671a0SAneesh Kumar K.V desc_count += ext4_free_inodes_count(sb, gdp); 1454ac27a0ecSDave Kleikamp brelse(bitmap_bh); 1455e29d1cdeSEric Sandeen bitmap_bh = ext4_read_inode_bitmap(sb, i); 14569008a58eSDarrick J. Wong if (IS_ERR(bitmap_bh)) { 14579008a58eSDarrick J. Wong bitmap_bh = NULL; 1458ac27a0ecSDave Kleikamp continue; 14599008a58eSDarrick J. Wong } 1460ac27a0ecSDave Kleikamp 1461f6fb99caSTheodore Ts'o x = ext4_count_free(bitmap_bh->b_data, 1462f6fb99caSTheodore Ts'o EXT4_INODES_PER_GROUP(sb) / 8); 1463c549a95dSEric Sandeen printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n", 1464785b4b3aSPeng Tao (unsigned long) i, ext4_free_inodes_count(sb, gdp), x); 1465ac27a0ecSDave Kleikamp bitmap_count += x; 1466ac27a0ecSDave Kleikamp } 1467ac27a0ecSDave Kleikamp brelse(bitmap_bh); 14684776004fSTheodore Ts'o printk(KERN_DEBUG "ext4_count_free_inodes: " 14694776004fSTheodore Ts'o "stored = %u, computed = %lu, %lu\n", 1470ac27a0ecSDave Kleikamp le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count); 1471ac27a0ecSDave Kleikamp return desc_count; 1472ac27a0ecSDave Kleikamp #else 1473ac27a0ecSDave Kleikamp desc_count = 0; 14748df9675fSTheodore Ts'o for (i = 0; i < ngroups; i++) { 1475617ba13bSMingming Cao gdp = ext4_get_group_desc(sb, i, NULL); 1476ac27a0ecSDave Kleikamp if (!gdp) 1477ac27a0ecSDave Kleikamp continue; 1478560671a0SAneesh Kumar K.V desc_count += ext4_free_inodes_count(sb, gdp); 1479ac27a0ecSDave Kleikamp cond_resched(); 1480ac27a0ecSDave Kleikamp } 1481ac27a0ecSDave Kleikamp return desc_count; 1482ac27a0ecSDave Kleikamp #endif 1483ac27a0ecSDave Kleikamp } 1484ac27a0ecSDave Kleikamp 1485ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1486617ba13bSMingming Cao unsigned long ext4_count_dirs(struct super_block * sb) 1487ac27a0ecSDave Kleikamp { 1488ac27a0ecSDave Kleikamp unsigned long count = 0; 14898df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 1490ac27a0ecSDave Kleikamp 14918df9675fSTheodore Ts'o for (i = 0; i < ngroups; i++) { 1492617ba13bSMingming Cao struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1493ac27a0ecSDave Kleikamp if (!gdp) 1494ac27a0ecSDave Kleikamp continue; 1495560671a0SAneesh Kumar K.V count += ext4_used_dirs_count(sb, gdp); 1496ac27a0ecSDave Kleikamp } 1497ac27a0ecSDave Kleikamp return count; 1498ac27a0ecSDave Kleikamp } 1499bfff6873SLukas Czerner 1500bfff6873SLukas Czerner /* 1501bfff6873SLukas Czerner * Zeroes not yet zeroed inode table - just write zeroes through the whole 1502bfff6873SLukas Czerner * inode table. Must be called without any spinlock held. The only place 1503bfff6873SLukas Czerner * where it is called from on active part of filesystem is ext4lazyinit 1504bfff6873SLukas Czerner * thread, so we do not need any special locks, however we have to prevent 1505bfff6873SLukas Czerner * inode allocation from the current group, so we take alloc_sem lock, to 1506119c0d44STheodore Ts'o * block ext4_new_inode() until we are finished. 1507bfff6873SLukas Czerner */ 1508e0cbee3eSH Hartley Sweeten int ext4_init_inode_table(struct super_block *sb, ext4_group_t group, 1509bfff6873SLukas Czerner int barrier) 1510bfff6873SLukas Czerner { 1511bfff6873SLukas Czerner struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1512bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 1513bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 1514bfff6873SLukas Czerner struct buffer_head *group_desc_bh; 1515bfff6873SLukas Czerner handle_t *handle; 1516bfff6873SLukas Czerner ext4_fsblk_t blk; 1517bfff6873SLukas Czerner int num, ret = 0, used_blks = 0; 1518a149d2a5SZhang Yi unsigned long used_inos = 0; 1519bfff6873SLukas Czerner 1520bfff6873SLukas Czerner /* This should not happen, but just to be sure check this */ 1521bc98a42cSDavid Howells if (sb_rdonly(sb)) { 1522bfff6873SLukas Czerner ret = 1; 1523bfff6873SLukas Czerner goto out; 1524bfff6873SLukas Czerner } 1525bfff6873SLukas Czerner 1526bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, &group_desc_bh); 1527bfff6873SLukas Czerner if (!gdp) 1528bfff6873SLukas Czerner goto out; 1529bfff6873SLukas Czerner 1530bfff6873SLukas Czerner /* 1531bfff6873SLukas Czerner * We do not need to lock this, because we are the only one 1532bfff6873SLukas Czerner * handling this flag. 1533bfff6873SLukas Czerner */ 1534bfff6873SLukas Czerner if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)) 1535bfff6873SLukas Czerner goto out; 1536bfff6873SLukas Czerner 15379924a92aSTheodore Ts'o handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); 1538bfff6873SLukas Czerner if (IS_ERR(handle)) { 1539bfff6873SLukas Czerner ret = PTR_ERR(handle); 1540bfff6873SLukas Czerner goto out; 1541bfff6873SLukas Czerner } 1542bfff6873SLukas Czerner 1543bfff6873SLukas Czerner down_write(&grp->alloc_sem); 1544bfff6873SLukas Czerner /* 1545bfff6873SLukas Czerner * If inode bitmap was already initialized there may be some 1546bfff6873SLukas Czerner * used inodes so we need to skip blocks with used inodes in 1547bfff6873SLukas Czerner * inode table. 1548bfff6873SLukas Czerner */ 1549a149d2a5SZhang Yi if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT))) { 1550a149d2a5SZhang Yi used_inos = EXT4_INODES_PER_GROUP(sb) - 1551a149d2a5SZhang Yi ext4_itable_unused_count(sb, gdp); 1552a149d2a5SZhang Yi used_blks = DIV_ROUND_UP(used_inos, sbi->s_inodes_per_block); 1553bfff6873SLukas Czerner 1554a149d2a5SZhang Yi /* Bogus inode unused count? */ 1555a149d2a5SZhang Yi if (used_blks < 0 || used_blks > sbi->s_itb_per_group) { 15561084f252STheodore Ts'o ext4_error(sb, "Something is wrong with group %u: " 15571084f252STheodore Ts'o "used itable blocks: %d; " 15581084f252STheodore Ts'o "itable unused count: %u", 1559857ac889SLukas Czerner group, used_blks, 1560857ac889SLukas Czerner ext4_itable_unused_count(sb, gdp)); 1561857ac889SLukas Czerner ret = 1; 156233853a0dSYongqiang Yang goto err_out; 1563857ac889SLukas Czerner } 1564857ac889SLukas Czerner 1565a149d2a5SZhang Yi used_inos += group * EXT4_INODES_PER_GROUP(sb); 1566a149d2a5SZhang Yi /* 1567a149d2a5SZhang Yi * Are there some uninitialized inodes in the inode table 1568a149d2a5SZhang Yi * before the first normal inode? 1569a149d2a5SZhang Yi */ 1570a149d2a5SZhang Yi if ((used_blks != sbi->s_itb_per_group) && 1571a149d2a5SZhang Yi (used_inos < EXT4_FIRST_INO(sb))) { 1572a149d2a5SZhang Yi ext4_error(sb, "Something is wrong with group %u: " 1573a149d2a5SZhang Yi "itable unused count: %u; " 1574a149d2a5SZhang Yi "itables initialized count: %ld", 1575a149d2a5SZhang Yi group, ext4_itable_unused_count(sb, gdp), 1576a149d2a5SZhang Yi used_inos); 1577a149d2a5SZhang Yi ret = 1; 1578a149d2a5SZhang Yi goto err_out; 1579a149d2a5SZhang Yi } 1580a149d2a5SZhang Yi } 1581a149d2a5SZhang Yi 1582bfff6873SLukas Czerner blk = ext4_inode_table(sb, gdp) + used_blks; 1583bfff6873SLukas Czerner num = sbi->s_itb_per_group - used_blks; 1584bfff6873SLukas Czerner 1585bfff6873SLukas Czerner BUFFER_TRACE(group_desc_bh, "get_write_access"); 1586bfff6873SLukas Czerner ret = ext4_journal_get_write_access(handle, 1587bfff6873SLukas Czerner group_desc_bh); 1588bfff6873SLukas Czerner if (ret) 1589bfff6873SLukas Czerner goto err_out; 1590bfff6873SLukas Czerner 1591bfff6873SLukas Czerner /* 1592bfff6873SLukas Czerner * Skip zeroout if the inode table is full. But we set the ZEROED 1593bfff6873SLukas Czerner * flag anyway, because obviously, when it is full it does not need 1594bfff6873SLukas Czerner * further zeroing. 1595bfff6873SLukas Czerner */ 1596bfff6873SLukas Czerner if (unlikely(num == 0)) 1597bfff6873SLukas Czerner goto skip_zeroout; 1598bfff6873SLukas Czerner 1599bfff6873SLukas Czerner ext4_debug("going to zero out inode table in group %d\n", 1600bfff6873SLukas Czerner group); 1601a107e5a3STheodore Ts'o ret = sb_issue_zeroout(sb, blk, num, GFP_NOFS); 1602bfff6873SLukas Czerner if (ret < 0) 1603bfff6873SLukas Czerner goto err_out; 1604a107e5a3STheodore Ts'o if (barrier) 1605c6bf3f0eSChristoph Hellwig blkdev_issue_flush(sb->s_bdev); 1606bfff6873SLukas Czerner 1607bfff6873SLukas Czerner skip_zeroout: 1608bfff6873SLukas Czerner ext4_lock_group(sb, group); 1609bfff6873SLukas Czerner gdp->bg_flags |= cpu_to_le16(EXT4_BG_INODE_ZEROED); 1610feb0ab32SDarrick J. Wong ext4_group_desc_csum_set(sb, group, gdp); 1611bfff6873SLukas Czerner ext4_unlock_group(sb, group); 1612bfff6873SLukas Czerner 1613bfff6873SLukas Czerner BUFFER_TRACE(group_desc_bh, 1614bfff6873SLukas Czerner "call ext4_handle_dirty_metadata"); 1615bfff6873SLukas Czerner ret = ext4_handle_dirty_metadata(handle, NULL, 1616bfff6873SLukas Czerner group_desc_bh); 1617bfff6873SLukas Czerner 1618bfff6873SLukas Czerner err_out: 1619bfff6873SLukas Czerner up_write(&grp->alloc_sem); 1620bfff6873SLukas Czerner ext4_journal_stop(handle); 1621bfff6873SLukas Czerner out: 1622bfff6873SLukas Czerner return ret; 1623bfff6873SLukas Czerner } 1624