1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/ialloc.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * BSD ufs-inspired inode and directory allocation by 10ac27a0ecSDave Kleikamp * Stephen Tweedie (sct@redhat.com), 1993 11ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 12ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 13ac27a0ecSDave Kleikamp */ 14ac27a0ecSDave Kleikamp 15ac27a0ecSDave Kleikamp #include <linux/time.h> 16ac27a0ecSDave Kleikamp #include <linux/fs.h> 17dab291afSMingming Cao #include <linux/jbd2.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> 25ac27a0ecSDave Kleikamp #include <asm/byteorder.h> 269bffad1eSTheodore Ts'o 273dcf5451SChristoph Hellwig #include "ext4.h" 283dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 29ac27a0ecSDave Kleikamp #include "xattr.h" 30ac27a0ecSDave Kleikamp #include "acl.h" 31ac27a0ecSDave Kleikamp 329bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 339bffad1eSTheodore Ts'o 34ac27a0ecSDave Kleikamp /* 35ac27a0ecSDave Kleikamp * ialloc.c contains the inodes allocation and deallocation routines 36ac27a0ecSDave Kleikamp */ 37ac27a0ecSDave Kleikamp 38ac27a0ecSDave Kleikamp /* 39ac27a0ecSDave Kleikamp * The free inodes are managed by bitmaps. A file system contains several 40ac27a0ecSDave Kleikamp * blocks groups. Each group contains 1 bitmap block for blocks, 1 bitmap 41ac27a0ecSDave Kleikamp * block for inodes, N blocks for the inode table and data blocks. 42ac27a0ecSDave Kleikamp * 43ac27a0ecSDave Kleikamp * The file system contains group descriptors which are located after the 44ac27a0ecSDave Kleikamp * super block. Each descriptor contains the number of the bitmap block and 45ac27a0ecSDave Kleikamp * the free blocks count in the block. 46ac27a0ecSDave Kleikamp */ 47ac27a0ecSDave Kleikamp 48717d50e4SAndreas Dilger /* 49717d50e4SAndreas Dilger * To avoid calling the atomic setbit hundreds or thousands of times, we only 50717d50e4SAndreas Dilger * need to use it within a single byte (to ensure we get endianness right). 51717d50e4SAndreas Dilger * We can use memset for the rest of the bitmap as there are no other users. 52717d50e4SAndreas Dilger */ 5361d08673STheodore Ts'o void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap) 54717d50e4SAndreas Dilger { 55717d50e4SAndreas Dilger int i; 56717d50e4SAndreas Dilger 57717d50e4SAndreas Dilger if (start_bit >= end_bit) 58717d50e4SAndreas Dilger return; 59717d50e4SAndreas Dilger 60717d50e4SAndreas Dilger ext4_debug("mark end bits +%d through +%d used\n", start_bit, end_bit); 61717d50e4SAndreas Dilger for (i = start_bit; i < ((start_bit + 7) & ~7UL); i++) 62717d50e4SAndreas Dilger ext4_set_bit(i, bitmap); 63717d50e4SAndreas Dilger if (i < end_bit) 64717d50e4SAndreas Dilger memset(bitmap + (i >> 3), 0xff, (end_bit - i) >> 3); 65717d50e4SAndreas Dilger } 66717d50e4SAndreas Dilger 67717d50e4SAndreas Dilger /* Initializes an uninitialized inode bitmap */ 681f109d5aSTheodore Ts'o static unsigned ext4_init_inode_bitmap(struct super_block *sb, 691f109d5aSTheodore Ts'o struct buffer_head *bh, 70fd2d4291SAvantika Mathur ext4_group_t block_group, 71717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 72717d50e4SAndreas Dilger { 73bdfb6ff4SDarrick J. Wong struct ext4_group_info *grp; 74e43bb4e6SNamjae Jeon struct ext4_sb_info *sbi = EXT4_SB(sb); 75717d50e4SAndreas Dilger J_ASSERT_BH(bh, buffer_locked(bh)); 76717d50e4SAndreas Dilger 77717d50e4SAndreas Dilger /* If checksum is bad mark all blocks and inodes use to prevent 78717d50e4SAndreas Dilger * allocation, essentially implementing a per-group read-only flag. */ 79feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) { 8012062dddSEric Sandeen ext4_error(sb, "Checksum bad for group %u", block_group); 81bdfb6ff4SDarrick J. Wong grp = ext4_get_group_info(sb, block_group); 82e43bb4e6SNamjae Jeon if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp)) 83e43bb4e6SNamjae Jeon percpu_counter_sub(&sbi->s_freeclusters_counter, 84e43bb4e6SNamjae Jeon grp->bb_free); 85bdfb6ff4SDarrick J. Wong set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state); 86e43bb4e6SNamjae Jeon if (!EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { 87e43bb4e6SNamjae Jeon int count; 88e43bb4e6SNamjae Jeon count = ext4_free_inodes_count(sb, gdp); 89e43bb4e6SNamjae Jeon percpu_counter_sub(&sbi->s_freeinodes_counter, 90e43bb4e6SNamjae Jeon count); 91e43bb4e6SNamjae Jeon } 92bdfb6ff4SDarrick J. Wong set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state); 93717d50e4SAndreas Dilger return 0; 94717d50e4SAndreas Dilger } 95717d50e4SAndreas Dilger 96717d50e4SAndreas Dilger memset(bh->b_data, 0, (EXT4_INODES_PER_GROUP(sb) + 7) / 8); 9761d08673STheodore Ts'o ext4_mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), sb->s_blocksize * 8, 98717d50e4SAndreas Dilger bh->b_data); 9941a246d1SDarrick J. Wong ext4_inode_bitmap_csum_set(sb, block_group, gdp, bh, 10041a246d1SDarrick J. Wong EXT4_INODES_PER_GROUP(sb) / 8); 101feb0ab32SDarrick J. Wong ext4_group_desc_csum_set(sb, block_group, gdp); 102717d50e4SAndreas Dilger 103717d50e4SAndreas Dilger return EXT4_INODES_PER_GROUP(sb); 104717d50e4SAndreas Dilger } 105ac27a0ecSDave Kleikamp 106813e5727STheodore Ts'o void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate) 107813e5727STheodore Ts'o { 108813e5727STheodore Ts'o if (uptodate) { 109813e5727STheodore Ts'o set_buffer_uptodate(bh); 110813e5727STheodore Ts'o set_bitmap_uptodate(bh); 111813e5727STheodore Ts'o } 112813e5727STheodore Ts'o unlock_buffer(bh); 113813e5727STheodore Ts'o put_bh(bh); 114813e5727STheodore Ts'o } 115813e5727STheodore Ts'o 116ac27a0ecSDave Kleikamp /* 117ac27a0ecSDave Kleikamp * Read the inode allocation bitmap for a given block_group, reading 118ac27a0ecSDave Kleikamp * into the specified slot in the superblock's bitmap cache. 119ac27a0ecSDave Kleikamp * 120ac27a0ecSDave Kleikamp * Return buffer_head of bitmap on success or NULL. 121ac27a0ecSDave Kleikamp */ 122ac27a0ecSDave Kleikamp static struct buffer_head * 123e29d1cdeSEric Sandeen ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group) 124ac27a0ecSDave Kleikamp { 125617ba13bSMingming Cao struct ext4_group_desc *desc; 126ac27a0ecSDave Kleikamp struct buffer_head *bh = NULL; 127e29d1cdeSEric Sandeen ext4_fsblk_t bitmap_blk; 12887a39389SDarrick J. Wong struct ext4_group_info *grp; 129e43bb4e6SNamjae Jeon struct ext4_sb_info *sbi = EXT4_SB(sb); 130ac27a0ecSDave Kleikamp 131617ba13bSMingming Cao desc = ext4_get_group_desc(sb, block_group, NULL); 132ac27a0ecSDave Kleikamp if (!desc) 133e29d1cdeSEric Sandeen return NULL; 134bfff6873SLukas Czerner 135e29d1cdeSEric Sandeen bitmap_blk = ext4_inode_bitmap(sb, desc); 136e29d1cdeSEric Sandeen bh = sb_getblk(sb, bitmap_blk); 137e29d1cdeSEric Sandeen if (unlikely(!bh)) { 13812062dddSEric Sandeen ext4_error(sb, "Cannot read inode bitmap - " 139a9df9a49STheodore Ts'o "block_group = %u, inode_bitmap = %llu", 140e29d1cdeSEric Sandeen block_group, bitmap_blk); 141e29d1cdeSEric Sandeen return NULL; 142e29d1cdeSEric Sandeen } 1432ccb5fb9SAneesh Kumar K.V if (bitmap_uptodate(bh)) 14441a246d1SDarrick J. Wong goto verify; 145e29d1cdeSEric Sandeen 146c806e68fSFrederic Bohe lock_buffer(bh); 1472ccb5fb9SAneesh Kumar K.V if (bitmap_uptodate(bh)) { 1482ccb5fb9SAneesh Kumar K.V unlock_buffer(bh); 14941a246d1SDarrick J. Wong goto verify; 1502ccb5fb9SAneesh Kumar K.V } 151bfff6873SLukas Czerner 152955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, block_group); 153e29d1cdeSEric Sandeen if (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { 154e29d1cdeSEric Sandeen ext4_init_inode_bitmap(sb, bh, block_group, desc); 1552ccb5fb9SAneesh Kumar K.V set_bitmap_uptodate(bh); 156e29d1cdeSEric Sandeen set_buffer_uptodate(bh); 15741a246d1SDarrick J. Wong set_buffer_verified(bh); 158955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, block_group); 1593300bedaSAneesh Kumar K.V unlock_buffer(bh); 160e29d1cdeSEric Sandeen return bh; 161e29d1cdeSEric Sandeen } 162955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, block_group); 163bfff6873SLukas Czerner 1642ccb5fb9SAneesh Kumar K.V if (buffer_uptodate(bh)) { 1652ccb5fb9SAneesh Kumar K.V /* 1662ccb5fb9SAneesh Kumar K.V * if not uninit if bh is uptodate, 1672ccb5fb9SAneesh Kumar K.V * bitmap is also uptodate 1682ccb5fb9SAneesh Kumar K.V */ 1692ccb5fb9SAneesh Kumar K.V set_bitmap_uptodate(bh); 1702ccb5fb9SAneesh Kumar K.V unlock_buffer(bh); 17141a246d1SDarrick J. Wong goto verify; 1722ccb5fb9SAneesh Kumar K.V } 1732ccb5fb9SAneesh Kumar K.V /* 174813e5727STheodore Ts'o * submit the buffer_head for reading 1752ccb5fb9SAneesh Kumar K.V */ 1760562e0baSJiaying Zhang trace_ext4_load_inode_bitmap(sb, block_group); 177813e5727STheodore Ts'o bh->b_end_io = ext4_end_bitmap_read; 178813e5727STheodore Ts'o get_bh(bh); 1799f203507STheodore Ts'o submit_bh(READ | REQ_META | REQ_PRIO, bh); 180813e5727STheodore Ts'o wait_on_buffer(bh); 181813e5727STheodore Ts'o if (!buffer_uptodate(bh)) { 182e29d1cdeSEric Sandeen put_bh(bh); 18312062dddSEric Sandeen ext4_error(sb, "Cannot read inode bitmap - " 184a9df9a49STheodore Ts'o "block_group = %u, inode_bitmap = %llu", 185e29d1cdeSEric Sandeen block_group, bitmap_blk); 186e29d1cdeSEric Sandeen return NULL; 187e29d1cdeSEric Sandeen } 18841a246d1SDarrick J. Wong 18941a246d1SDarrick J. Wong verify: 19041a246d1SDarrick J. Wong ext4_lock_group(sb, block_group); 19141a246d1SDarrick J. Wong if (!buffer_verified(bh) && 19241a246d1SDarrick J. Wong !ext4_inode_bitmap_csum_verify(sb, block_group, desc, bh, 19341a246d1SDarrick J. Wong EXT4_INODES_PER_GROUP(sb) / 8)) { 19441a246d1SDarrick J. Wong ext4_unlock_group(sb, block_group); 19541a246d1SDarrick J. Wong put_bh(bh); 19641a246d1SDarrick J. Wong ext4_error(sb, "Corrupt inode bitmap - block_group = %u, " 19741a246d1SDarrick J. Wong "inode_bitmap = %llu", block_group, bitmap_blk); 19887a39389SDarrick J. Wong grp = ext4_get_group_info(sb, block_group); 199e43bb4e6SNamjae Jeon if (!EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { 200e43bb4e6SNamjae Jeon int count; 201e43bb4e6SNamjae Jeon count = ext4_free_inodes_count(sb, desc); 202e43bb4e6SNamjae Jeon percpu_counter_sub(&sbi->s_freeinodes_counter, 203e43bb4e6SNamjae Jeon count); 204e43bb4e6SNamjae Jeon } 20587a39389SDarrick J. Wong set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state); 20641a246d1SDarrick J. Wong return NULL; 20741a246d1SDarrick J. Wong } 20841a246d1SDarrick J. Wong ext4_unlock_group(sb, block_group); 20941a246d1SDarrick J. Wong set_buffer_verified(bh); 210ac27a0ecSDave Kleikamp return bh; 211ac27a0ecSDave Kleikamp } 212ac27a0ecSDave Kleikamp 213ac27a0ecSDave Kleikamp /* 214ac27a0ecSDave Kleikamp * NOTE! When we get the inode, we're the only people 215ac27a0ecSDave Kleikamp * that have access to it, and as such there are no 216ac27a0ecSDave Kleikamp * race conditions we have to worry about. The inode 217ac27a0ecSDave Kleikamp * is not on the hash-lists, and it cannot be reached 218ac27a0ecSDave Kleikamp * through the filesystem because the directory entry 219ac27a0ecSDave Kleikamp * has been deleted earlier. 220ac27a0ecSDave Kleikamp * 221ac27a0ecSDave Kleikamp * HOWEVER: we must make sure that we get no aliases, 222ac27a0ecSDave Kleikamp * which means that we have to call "clear_inode()" 223ac27a0ecSDave Kleikamp * _before_ we mark the inode not in use in the inode 224ac27a0ecSDave Kleikamp * bitmaps. Otherwise a newly created file might use 225ac27a0ecSDave Kleikamp * the same inode number (not actually the same pointer 226ac27a0ecSDave Kleikamp * though), and then we'd have two inodes sharing the 227ac27a0ecSDave Kleikamp * same inode number and space on the harddisk. 228ac27a0ecSDave Kleikamp */ 229617ba13bSMingming Cao void ext4_free_inode(handle_t *handle, struct inode *inode) 230ac27a0ecSDave Kleikamp { 231ac27a0ecSDave Kleikamp struct super_block *sb = inode->i_sb; 232ac27a0ecSDave Kleikamp int is_directory; 233ac27a0ecSDave Kleikamp unsigned long ino; 234ac27a0ecSDave Kleikamp struct buffer_head *bitmap_bh = NULL; 235ac27a0ecSDave Kleikamp struct buffer_head *bh2; 236fd2d4291SAvantika Mathur ext4_group_t block_group; 237ac27a0ecSDave Kleikamp unsigned long bit; 238617ba13bSMingming Cao struct ext4_group_desc *gdp; 239617ba13bSMingming Cao struct ext4_super_block *es; 240617ba13bSMingming Cao struct ext4_sb_info *sbi; 2417ce9d5d1SEric Sandeen int fatal = 0, err, count, cleared; 24287a39389SDarrick J. Wong struct ext4_group_info *grp; 243ac27a0ecSDave Kleikamp 24492b97816STheodore Ts'o if (!sb) { 24592b97816STheodore Ts'o printk(KERN_ERR "EXT4-fs: %s:%d: inode on " 24692b97816STheodore Ts'o "nonexistent device\n", __func__, __LINE__); 24792b97816STheodore Ts'o return; 24892b97816STheodore Ts'o } 249ac27a0ecSDave Kleikamp if (atomic_read(&inode->i_count) > 1) { 25092b97816STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s:%d: inode #%lu: count=%d", 25192b97816STheodore Ts'o __func__, __LINE__, inode->i_ino, 252ac27a0ecSDave Kleikamp atomic_read(&inode->i_count)); 253ac27a0ecSDave Kleikamp return; 254ac27a0ecSDave Kleikamp } 255ac27a0ecSDave Kleikamp if (inode->i_nlink) { 25692b97816STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s:%d: inode #%lu: nlink=%d\n", 25792b97816STheodore Ts'o __func__, __LINE__, inode->i_ino, inode->i_nlink); 258ac27a0ecSDave Kleikamp return; 259ac27a0ecSDave Kleikamp } 260617ba13bSMingming Cao sbi = EXT4_SB(sb); 261ac27a0ecSDave Kleikamp 262ac27a0ecSDave Kleikamp ino = inode->i_ino; 263617ba13bSMingming Cao ext4_debug("freeing inode %lu\n", ino); 2649bffad1eSTheodore Ts'o trace_ext4_free_inode(inode); 265ac27a0ecSDave Kleikamp 266ac27a0ecSDave Kleikamp /* 267ac27a0ecSDave Kleikamp * Note: we must free any quota before locking the superblock, 268ac27a0ecSDave Kleikamp * as writing the quota to disk may need the lock as well. 269ac27a0ecSDave Kleikamp */ 270871a2931SChristoph Hellwig dquot_initialize(inode); 271617ba13bSMingming Cao ext4_xattr_delete_inode(handle, inode); 27263936ddaSChristoph Hellwig dquot_free_inode(inode); 2739f754758SChristoph Hellwig dquot_drop(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 280617ba13bSMingming Cao es = EXT4_SB(sb)->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. */ 28987a39389SDarrick J. Wong grp = ext4_get_group_info(sb, block_group); 29087a39389SDarrick J. Wong if (unlikely(EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) || !bitmap_bh) 291ac27a0ecSDave Kleikamp goto error_return; 292ac27a0ecSDave Kleikamp 293ac27a0ecSDave Kleikamp BUFFER_TRACE(bitmap_bh, "get_write_access"); 294617ba13bSMingming Cao fatal = ext4_journal_get_write_access(handle, bitmap_bh); 295ac27a0ecSDave Kleikamp if (fatal) 296ac27a0ecSDave Kleikamp goto error_return; 297ac27a0ecSDave Kleikamp 298d17413c0SDmitry Monakhov fatal = -ESRCH; 299617ba13bSMingming Cao gdp = ext4_get_group_desc(sb, block_group, &bh2); 300d17413c0SDmitry Monakhov if (gdp) { 301ac27a0ecSDave Kleikamp BUFFER_TRACE(bh2, "get_write_access"); 302617ba13bSMingming Cao fatal = ext4_journal_get_write_access(handle, bh2); 303d17413c0SDmitry Monakhov } 304955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, block_group); 305597d508cSAkinobu Mita cleared = ext4_test_and_clear_bit(bit, bitmap_bh->b_data); 306d17413c0SDmitry Monakhov if (fatal || !cleared) { 307d17413c0SDmitry Monakhov ext4_unlock_group(sb, block_group); 308d17413c0SDmitry Monakhov goto out; 309d17413c0SDmitry Monakhov } 310d17413c0SDmitry Monakhov 311560671a0SAneesh Kumar K.V count = ext4_free_inodes_count(sb, gdp) + 1; 312560671a0SAneesh Kumar K.V ext4_free_inodes_set(sb, gdp, count); 313560671a0SAneesh Kumar K.V if (is_directory) { 314560671a0SAneesh Kumar K.V count = ext4_used_dirs_count(sb, gdp) - 1; 315560671a0SAneesh Kumar K.V ext4_used_dirs_set(sb, gdp, count); 316d17413c0SDmitry Monakhov percpu_counter_dec(&sbi->s_dirs_counter); 317d17413c0SDmitry Monakhov } 31841a246d1SDarrick J. Wong ext4_inode_bitmap_csum_set(sb, block_group, gdp, bitmap_bh, 31941a246d1SDarrick J. Wong EXT4_INODES_PER_GROUP(sb) / 8); 320feb0ab32SDarrick J. Wong ext4_group_desc_csum_set(sb, block_group, gdp); 321d17413c0SDmitry Monakhov ext4_unlock_group(sb, block_group); 3227d39db14STheodore Ts'o 323d17413c0SDmitry Monakhov percpu_counter_inc(&sbi->s_freeinodes_counter); 324d17413c0SDmitry Monakhov if (sbi->s_log_groups_per_flex) { 325d17413c0SDmitry Monakhov ext4_group_t f = ext4_flex_group(sbi, block_group); 326d17413c0SDmitry Monakhov 327d17413c0SDmitry Monakhov atomic_inc(&sbi->s_flex_groups[f].free_inodes); 328d17413c0SDmitry Monakhov if (is_directory) 329c4caae25SEric Sandeen atomic_dec(&sbi->s_flex_groups[f].used_dirs); 3307d39db14STheodore Ts'o } 3310390131bSFrank Mayhar BUFFER_TRACE(bh2, "call ext4_handle_dirty_metadata"); 332d17413c0SDmitry Monakhov fatal = ext4_handle_dirty_metadata(handle, NULL, bh2); 333d17413c0SDmitry Monakhov out: 334d17413c0SDmitry Monakhov if (cleared) { 3350390131bSFrank Mayhar BUFFER_TRACE(bitmap_bh, "call ext4_handle_dirty_metadata"); 3360390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh); 337ac27a0ecSDave Kleikamp if (!fatal) 338ac27a0ecSDave Kleikamp fatal = err; 33987a39389SDarrick J. Wong } else { 340d17413c0SDmitry Monakhov ext4_error(sb, "bit already cleared for inode %lu", ino); 341bf40c926SNamjae Jeon if (gdp && !EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { 342e43bb4e6SNamjae Jeon int count; 343e43bb4e6SNamjae Jeon count = ext4_free_inodes_count(sb, gdp); 344e43bb4e6SNamjae Jeon percpu_counter_sub(&sbi->s_freeinodes_counter, 345e43bb4e6SNamjae Jeon count); 346e43bb4e6SNamjae Jeon } 34787a39389SDarrick J. Wong set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state); 34887a39389SDarrick J. Wong } 349d17413c0SDmitry Monakhov 350ac27a0ecSDave Kleikamp error_return: 351ac27a0ecSDave Kleikamp brelse(bitmap_bh); 352617ba13bSMingming Cao ext4_std_error(sb, fatal); 353ac27a0ecSDave Kleikamp } 354ac27a0ecSDave Kleikamp 355a4912123STheodore Ts'o struct orlov_stats { 35690ba983fSTheodore Ts'o __u64 free_clusters; 357a4912123STheodore Ts'o __u32 free_inodes; 358a4912123STheodore Ts'o __u32 used_dirs; 359a4912123STheodore Ts'o }; 360a4912123STheodore Ts'o 361a4912123STheodore Ts'o /* 362a4912123STheodore Ts'o * Helper function for Orlov's allocator; returns critical information 363a4912123STheodore Ts'o * for a particular block group or flex_bg. If flex_size is 1, then g 364a4912123STheodore Ts'o * is a block group number; otherwise it is flex_bg number. 365a4912123STheodore Ts'o */ 3661f109d5aSTheodore Ts'o static void get_orlov_stats(struct super_block *sb, ext4_group_t g, 367a4912123STheodore Ts'o int flex_size, struct orlov_stats *stats) 368a4912123STheodore Ts'o { 369a4912123STheodore Ts'o struct ext4_group_desc *desc; 3707d39db14STheodore Ts'o struct flex_groups *flex_group = EXT4_SB(sb)->s_flex_groups; 371a4912123STheodore Ts'o 3727d39db14STheodore Ts'o if (flex_size > 1) { 3737d39db14STheodore Ts'o stats->free_inodes = atomic_read(&flex_group[g].free_inodes); 37490ba983fSTheodore Ts'o stats->free_clusters = atomic64_read(&flex_group[g].free_clusters); 3757d39db14STheodore Ts'o stats->used_dirs = atomic_read(&flex_group[g].used_dirs); 3767d39db14STheodore Ts'o return; 3777d39db14STheodore Ts'o } 3787d39db14STheodore Ts'o 3797d39db14STheodore Ts'o desc = ext4_get_group_desc(sb, g, NULL); 3807d39db14STheodore Ts'o if (desc) { 3817d39db14STheodore Ts'o stats->free_inodes = ext4_free_inodes_count(sb, desc); 382021b65bbSTheodore Ts'o stats->free_clusters = ext4_free_group_clusters(sb, desc); 3837d39db14STheodore Ts'o stats->used_dirs = ext4_used_dirs_count(sb, desc); 3847d39db14STheodore Ts'o } else { 385a4912123STheodore Ts'o stats->free_inodes = 0; 38624aaa8efSTheodore Ts'o stats->free_clusters = 0; 387a4912123STheodore Ts'o stats->used_dirs = 0; 388a4912123STheodore Ts'o } 389a4912123STheodore Ts'o } 390a4912123STheodore Ts'o 391ac27a0ecSDave Kleikamp /* 392ac27a0ecSDave Kleikamp * Orlov's allocator for directories. 393ac27a0ecSDave Kleikamp * 394ac27a0ecSDave Kleikamp * We always try to spread first-level directories. 395ac27a0ecSDave Kleikamp * 396ac27a0ecSDave Kleikamp * If there are blockgroups with both free inodes and free blocks counts 397ac27a0ecSDave Kleikamp * not worse than average we return one with smallest directory count. 398ac27a0ecSDave Kleikamp * Otherwise we simply return a random group. 399ac27a0ecSDave Kleikamp * 400ac27a0ecSDave Kleikamp * For the rest rules look so: 401ac27a0ecSDave Kleikamp * 402ac27a0ecSDave Kleikamp * It's OK to put directory into a group unless 403ac27a0ecSDave Kleikamp * it has too many directories already (max_dirs) or 404ac27a0ecSDave Kleikamp * it has too few free inodes left (min_inodes) or 405ac27a0ecSDave Kleikamp * it has too few free blocks left (min_blocks) or 4061cc8dcf5SBenoit Boissinot * Parent's group is preferred, if it doesn't satisfy these 407ac27a0ecSDave Kleikamp * conditions we search cyclically through the rest. If none 408ac27a0ecSDave Kleikamp * of the groups look good we just look for a group with more 409ac27a0ecSDave Kleikamp * free inodes than average (starting at parent's group). 410ac27a0ecSDave Kleikamp */ 411ac27a0ecSDave Kleikamp 4122aa9fc4cSAvantika Mathur static int find_group_orlov(struct super_block *sb, struct inode *parent, 413dcca3fecSAl Viro ext4_group_t *group, umode_t mode, 414f157a4aaSTheodore Ts'o const struct qstr *qstr) 415ac27a0ecSDave Kleikamp { 416fd2d4291SAvantika Mathur ext4_group_t parent_group = EXT4_I(parent)->i_block_group; 417617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4188df9675fSTheodore Ts'o ext4_group_t real_ngroups = ext4_get_groups_count(sb); 419617ba13bSMingming Cao int inodes_per_group = EXT4_INODES_PER_GROUP(sb); 42014c83c9fSTheodore Ts'o unsigned int freei, avefreei, grp_free; 42124aaa8efSTheodore Ts'o ext4_fsblk_t freeb, avefreec; 422ac27a0ecSDave Kleikamp unsigned int ndirs; 423a4912123STheodore Ts'o int max_dirs, min_inodes; 42424aaa8efSTheodore Ts'o ext4_grpblk_t min_clusters; 4258df9675fSTheodore Ts'o ext4_group_t i, grp, g, ngroups; 426617ba13bSMingming Cao struct ext4_group_desc *desc; 427a4912123STheodore Ts'o struct orlov_stats stats; 428a4912123STheodore Ts'o int flex_size = ext4_flex_bg_size(sbi); 429f157a4aaSTheodore Ts'o struct dx_hash_info hinfo; 430a4912123STheodore Ts'o 4318df9675fSTheodore Ts'o ngroups = real_ngroups; 432a4912123STheodore Ts'o if (flex_size > 1) { 4338df9675fSTheodore Ts'o ngroups = (real_ngroups + flex_size - 1) >> 434a4912123STheodore Ts'o sbi->s_log_groups_per_flex; 435a4912123STheodore Ts'o parent_group >>= sbi->s_log_groups_per_flex; 436a4912123STheodore Ts'o } 437ac27a0ecSDave Kleikamp 438ac27a0ecSDave Kleikamp freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter); 439ac27a0ecSDave Kleikamp avefreei = freei / ngroups; 44057042651STheodore Ts'o freeb = EXT4_C2B(sbi, 44157042651STheodore Ts'o percpu_counter_read_positive(&sbi->s_freeclusters_counter)); 44224aaa8efSTheodore Ts'o avefreec = freeb; 44324aaa8efSTheodore Ts'o do_div(avefreec, ngroups); 444ac27a0ecSDave Kleikamp ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter); 445ac27a0ecSDave Kleikamp 446a4912123STheodore Ts'o if (S_ISDIR(mode) && 447a4912123STheodore Ts'o ((parent == sb->s_root->d_inode) || 44812e9b892SDmitry Monakhov (ext4_test_inode_flag(parent, EXT4_INODE_TOPDIR)))) { 449ac27a0ecSDave Kleikamp int best_ndir = inodes_per_group; 4502aa9fc4cSAvantika Mathur int ret = -1; 451ac27a0ecSDave Kleikamp 452f157a4aaSTheodore Ts'o if (qstr) { 453f157a4aaSTheodore Ts'o hinfo.hash_version = DX_HASH_HALF_MD4; 454f157a4aaSTheodore Ts'o hinfo.seed = sbi->s_hash_seed; 455f157a4aaSTheodore Ts'o ext4fs_dirhash(qstr->name, qstr->len, &hinfo); 456f157a4aaSTheodore Ts'o grp = hinfo.hash; 457f157a4aaSTheodore Ts'o } else 458dd1f723bSTheodore Ts'o grp = prandom_u32(); 4592aa9fc4cSAvantika Mathur parent_group = (unsigned)grp % ngroups; 460ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 461a4912123STheodore Ts'o g = (parent_group + i) % ngroups; 462a4912123STheodore Ts'o get_orlov_stats(sb, g, flex_size, &stats); 463a4912123STheodore Ts'o if (!stats.free_inodes) 464ac27a0ecSDave Kleikamp continue; 465a4912123STheodore Ts'o if (stats.used_dirs >= best_ndir) 466ac27a0ecSDave Kleikamp continue; 467a4912123STheodore Ts'o if (stats.free_inodes < avefreei) 468ac27a0ecSDave Kleikamp continue; 46924aaa8efSTheodore Ts'o if (stats.free_clusters < avefreec) 470ac27a0ecSDave Kleikamp continue; 471a4912123STheodore Ts'o grp = g; 4722aa9fc4cSAvantika Mathur ret = 0; 473a4912123STheodore Ts'o best_ndir = stats.used_dirs; 474ac27a0ecSDave Kleikamp } 475a4912123STheodore Ts'o if (ret) 476a4912123STheodore Ts'o goto fallback; 477a4912123STheodore Ts'o found_flex_bg: 478a4912123STheodore Ts'o if (flex_size == 1) { 479a4912123STheodore Ts'o *group = grp; 480a4912123STheodore Ts'o return 0; 481a4912123STheodore Ts'o } 482a4912123STheodore Ts'o 483a4912123STheodore Ts'o /* 484a4912123STheodore Ts'o * We pack inodes at the beginning of the flexgroup's 485a4912123STheodore Ts'o * inode tables. Block allocation decisions will do 486a4912123STheodore Ts'o * something similar, although regular files will 487a4912123STheodore Ts'o * start at 2nd block group of the flexgroup. See 488a4912123STheodore Ts'o * ext4_ext_find_goal() and ext4_find_near(). 489a4912123STheodore Ts'o */ 490a4912123STheodore Ts'o grp *= flex_size; 491a4912123STheodore Ts'o for (i = 0; i < flex_size; i++) { 4928df9675fSTheodore Ts'o if (grp+i >= real_ngroups) 493a4912123STheodore Ts'o break; 494a4912123STheodore Ts'o desc = ext4_get_group_desc(sb, grp+i, NULL); 495a4912123STheodore Ts'o if (desc && ext4_free_inodes_count(sb, desc)) { 496a4912123STheodore Ts'o *group = grp+i; 497a4912123STheodore Ts'o return 0; 498a4912123STheodore Ts'o } 499a4912123STheodore Ts'o } 500ac27a0ecSDave Kleikamp goto fallback; 501ac27a0ecSDave Kleikamp } 502ac27a0ecSDave Kleikamp 503ac27a0ecSDave Kleikamp max_dirs = ndirs / ngroups + inodes_per_group / 16; 504a4912123STheodore Ts'o min_inodes = avefreei - inodes_per_group*flex_size / 4; 505a4912123STheodore Ts'o if (min_inodes < 1) 506a4912123STheodore Ts'o min_inodes = 1; 50724aaa8efSTheodore Ts'o min_clusters = avefreec - EXT4_CLUSTERS_PER_GROUP(sb)*flex_size / 4; 508ac27a0ecSDave Kleikamp 509a4912123STheodore Ts'o /* 510a4912123STheodore Ts'o * Start looking in the flex group where we last allocated an 511a4912123STheodore Ts'o * inode for this parent directory 512a4912123STheodore Ts'o */ 513a4912123STheodore Ts'o if (EXT4_I(parent)->i_last_alloc_group != ~0) { 514a4912123STheodore Ts'o parent_group = EXT4_I(parent)->i_last_alloc_group; 515a4912123STheodore Ts'o if (flex_size > 1) 516a4912123STheodore Ts'o parent_group >>= sbi->s_log_groups_per_flex; 517a4912123STheodore Ts'o } 518ac27a0ecSDave Kleikamp 519ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 520a4912123STheodore Ts'o grp = (parent_group + i) % ngroups; 521a4912123STheodore Ts'o get_orlov_stats(sb, grp, flex_size, &stats); 522a4912123STheodore Ts'o if (stats.used_dirs >= max_dirs) 523ac27a0ecSDave Kleikamp continue; 524a4912123STheodore Ts'o if (stats.free_inodes < min_inodes) 525ac27a0ecSDave Kleikamp continue; 52624aaa8efSTheodore Ts'o if (stats.free_clusters < min_clusters) 527ac27a0ecSDave Kleikamp continue; 528a4912123STheodore Ts'o goto found_flex_bg; 529ac27a0ecSDave Kleikamp } 530ac27a0ecSDave Kleikamp 531ac27a0ecSDave Kleikamp fallback: 5328df9675fSTheodore Ts'o ngroups = real_ngroups; 533a4912123STheodore Ts'o avefreei = freei / ngroups; 534b5451f7bSTheodore Ts'o fallback_retry: 535a4912123STheodore Ts'o parent_group = EXT4_I(parent)->i_block_group; 536ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 537a4912123STheodore Ts'o grp = (parent_group + i) % ngroups; 538a4912123STheodore Ts'o desc = ext4_get_group_desc(sb, grp, NULL); 539bb3d132aSDan Carpenter if (desc) { 54014c83c9fSTheodore Ts'o grp_free = ext4_free_inodes_count(sb, desc); 541bb3d132aSDan Carpenter if (grp_free && grp_free >= avefreei) { 542a4912123STheodore Ts'o *group = grp; 5432aa9fc4cSAvantika Mathur return 0; 544ac27a0ecSDave Kleikamp } 545a4912123STheodore Ts'o } 546bb3d132aSDan Carpenter } 547ac27a0ecSDave Kleikamp 548ac27a0ecSDave Kleikamp if (avefreei) { 549ac27a0ecSDave Kleikamp /* 550ac27a0ecSDave Kleikamp * The free-inodes counter is approximate, and for really small 551ac27a0ecSDave Kleikamp * filesystems the above test can fail to find any blockgroups 552ac27a0ecSDave Kleikamp */ 553ac27a0ecSDave Kleikamp avefreei = 0; 554b5451f7bSTheodore Ts'o goto fallback_retry; 555ac27a0ecSDave Kleikamp } 556ac27a0ecSDave Kleikamp 557ac27a0ecSDave Kleikamp return -1; 558ac27a0ecSDave Kleikamp } 559ac27a0ecSDave Kleikamp 5602aa9fc4cSAvantika Mathur static int find_group_other(struct super_block *sb, struct inode *parent, 561dcca3fecSAl Viro ext4_group_t *group, umode_t mode) 562ac27a0ecSDave Kleikamp { 563fd2d4291SAvantika Mathur ext4_group_t parent_group = EXT4_I(parent)->i_block_group; 5648df9675fSTheodore Ts'o ext4_group_t i, last, ngroups = ext4_get_groups_count(sb); 565617ba13bSMingming Cao struct ext4_group_desc *desc; 566a4912123STheodore Ts'o int flex_size = ext4_flex_bg_size(EXT4_SB(sb)); 567a4912123STheodore Ts'o 568a4912123STheodore Ts'o /* 569a4912123STheodore Ts'o * Try to place the inode is the same flex group as its 570a4912123STheodore Ts'o * parent. If we can't find space, use the Orlov algorithm to 571a4912123STheodore Ts'o * find another flex group, and store that information in the 572a4912123STheodore Ts'o * parent directory's inode information so that use that flex 573a4912123STheodore Ts'o * group for future allocations. 574a4912123STheodore Ts'o */ 575a4912123STheodore Ts'o if (flex_size > 1) { 576a4912123STheodore Ts'o int retry = 0; 577a4912123STheodore Ts'o 578a4912123STheodore Ts'o try_again: 579a4912123STheodore Ts'o parent_group &= ~(flex_size-1); 580a4912123STheodore Ts'o last = parent_group + flex_size; 581a4912123STheodore Ts'o if (last > ngroups) 582a4912123STheodore Ts'o last = ngroups; 583a4912123STheodore Ts'o for (i = parent_group; i < last; i++) { 584a4912123STheodore Ts'o desc = ext4_get_group_desc(sb, i, NULL); 585a4912123STheodore Ts'o if (desc && ext4_free_inodes_count(sb, desc)) { 586a4912123STheodore Ts'o *group = i; 587a4912123STheodore Ts'o return 0; 588a4912123STheodore Ts'o } 589a4912123STheodore Ts'o } 590a4912123STheodore Ts'o if (!retry && EXT4_I(parent)->i_last_alloc_group != ~0) { 591a4912123STheodore Ts'o retry = 1; 592a4912123STheodore Ts'o parent_group = EXT4_I(parent)->i_last_alloc_group; 593a4912123STheodore Ts'o goto try_again; 594a4912123STheodore Ts'o } 595a4912123STheodore Ts'o /* 596a4912123STheodore Ts'o * If this didn't work, use the Orlov search algorithm 597a4912123STheodore Ts'o * to find a new flex group; we pass in the mode to 598a4912123STheodore Ts'o * avoid the topdir algorithms. 599a4912123STheodore Ts'o */ 600a4912123STheodore Ts'o *group = parent_group + flex_size; 601a4912123STheodore Ts'o if (*group > ngroups) 602a4912123STheodore Ts'o *group = 0; 6037dc57615SPeter Huewe return find_group_orlov(sb, parent, group, mode, NULL); 604a4912123STheodore Ts'o } 605ac27a0ecSDave Kleikamp 606ac27a0ecSDave Kleikamp /* 607ac27a0ecSDave Kleikamp * Try to place the inode in its parent directory 608ac27a0ecSDave Kleikamp */ 6092aa9fc4cSAvantika Mathur *group = parent_group; 6102aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 611560671a0SAneesh Kumar K.V if (desc && ext4_free_inodes_count(sb, desc) && 612021b65bbSTheodore Ts'o ext4_free_group_clusters(sb, desc)) 6132aa9fc4cSAvantika Mathur return 0; 614ac27a0ecSDave Kleikamp 615ac27a0ecSDave Kleikamp /* 616ac27a0ecSDave Kleikamp * We're going to place this inode in a different blockgroup from its 617ac27a0ecSDave Kleikamp * parent. We want to cause files in a common directory to all land in 618ac27a0ecSDave Kleikamp * the same blockgroup. But we want files which are in a different 619ac27a0ecSDave Kleikamp * directory which shares a blockgroup with our parent to land in a 620ac27a0ecSDave Kleikamp * different blockgroup. 621ac27a0ecSDave Kleikamp * 622ac27a0ecSDave Kleikamp * So add our directory's i_ino into the starting point for the hash. 623ac27a0ecSDave Kleikamp */ 6242aa9fc4cSAvantika Mathur *group = (*group + parent->i_ino) % ngroups; 625ac27a0ecSDave Kleikamp 626ac27a0ecSDave Kleikamp /* 627ac27a0ecSDave Kleikamp * Use a quadratic hash to find a group with a free inode and some free 628ac27a0ecSDave Kleikamp * blocks. 629ac27a0ecSDave Kleikamp */ 630ac27a0ecSDave Kleikamp for (i = 1; i < ngroups; i <<= 1) { 6312aa9fc4cSAvantika Mathur *group += i; 6322aa9fc4cSAvantika Mathur if (*group >= ngroups) 6332aa9fc4cSAvantika Mathur *group -= ngroups; 6342aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 635560671a0SAneesh Kumar K.V if (desc && ext4_free_inodes_count(sb, desc) && 636021b65bbSTheodore Ts'o ext4_free_group_clusters(sb, desc)) 6372aa9fc4cSAvantika Mathur return 0; 638ac27a0ecSDave Kleikamp } 639ac27a0ecSDave Kleikamp 640ac27a0ecSDave Kleikamp /* 641ac27a0ecSDave Kleikamp * That failed: try linear search for a free inode, even if that group 642ac27a0ecSDave Kleikamp * has no free blocks. 643ac27a0ecSDave Kleikamp */ 6442aa9fc4cSAvantika Mathur *group = parent_group; 645ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 6462aa9fc4cSAvantika Mathur if (++*group >= ngroups) 6472aa9fc4cSAvantika Mathur *group = 0; 6482aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 649560671a0SAneesh Kumar K.V if (desc && ext4_free_inodes_count(sb, desc)) 6502aa9fc4cSAvantika Mathur return 0; 651ac27a0ecSDave Kleikamp } 652ac27a0ecSDave Kleikamp 653ac27a0ecSDave Kleikamp return -1; 654ac27a0ecSDave Kleikamp } 655ac27a0ecSDave Kleikamp 656ac27a0ecSDave Kleikamp /* 65719883bd9STheodore Ts'o * In no journal mode, if an inode has recently been deleted, we want 65819883bd9STheodore Ts'o * to avoid reusing it until we're reasonably sure the inode table 65919883bd9STheodore Ts'o * block has been written back to disk. (Yes, these values are 66019883bd9STheodore Ts'o * somewhat arbitrary...) 66119883bd9STheodore Ts'o */ 66219883bd9STheodore Ts'o #define RECENTCY_MIN 5 66319883bd9STheodore Ts'o #define RECENTCY_DIRTY 30 66419883bd9STheodore Ts'o 66519883bd9STheodore Ts'o static int recently_deleted(struct super_block *sb, ext4_group_t group, int ino) 66619883bd9STheodore Ts'o { 66719883bd9STheodore Ts'o struct ext4_group_desc *gdp; 66819883bd9STheodore Ts'o struct ext4_inode *raw_inode; 66919883bd9STheodore Ts'o struct buffer_head *bh; 67019883bd9STheodore Ts'o unsigned long dtime, now; 67119883bd9STheodore Ts'o int inodes_per_block = EXT4_SB(sb)->s_inodes_per_block; 67219883bd9STheodore Ts'o int offset, ret = 0, recentcy = RECENTCY_MIN; 67319883bd9STheodore Ts'o 67419883bd9STheodore Ts'o gdp = ext4_get_group_desc(sb, group, NULL); 67519883bd9STheodore Ts'o if (unlikely(!gdp)) 67619883bd9STheodore Ts'o return 0; 67719883bd9STheodore Ts'o 67819883bd9STheodore Ts'o bh = sb_getblk(sb, ext4_inode_table(sb, gdp) + 67919883bd9STheodore Ts'o (ino / inodes_per_block)); 68019883bd9STheodore Ts'o if (unlikely(!bh) || !buffer_uptodate(bh)) 68119883bd9STheodore Ts'o /* 68219883bd9STheodore Ts'o * If the block is not in the buffer cache, then it 68319883bd9STheodore Ts'o * must have been written out. 68419883bd9STheodore Ts'o */ 68519883bd9STheodore Ts'o goto out; 68619883bd9STheodore Ts'o 68719883bd9STheodore Ts'o offset = (ino % inodes_per_block) * EXT4_INODE_SIZE(sb); 68819883bd9STheodore Ts'o raw_inode = (struct ext4_inode *) (bh->b_data + offset); 68919883bd9STheodore Ts'o dtime = le32_to_cpu(raw_inode->i_dtime); 69019883bd9STheodore Ts'o now = get_seconds(); 69119883bd9STheodore Ts'o if (buffer_dirty(bh)) 69219883bd9STheodore Ts'o recentcy += RECENTCY_DIRTY; 69319883bd9STheodore Ts'o 69419883bd9STheodore Ts'o if (dtime && (dtime < now) && (now < dtime + recentcy)) 69519883bd9STheodore Ts'o ret = 1; 69619883bd9STheodore Ts'o out: 69719883bd9STheodore Ts'o brelse(bh); 69819883bd9STheodore Ts'o return ret; 69919883bd9STheodore Ts'o } 70019883bd9STheodore Ts'o 70119883bd9STheodore Ts'o /* 702ac27a0ecSDave Kleikamp * There are two policies for allocating an inode. If the new inode is 703ac27a0ecSDave Kleikamp * a directory, then a forward search is made for a block group with both 704ac27a0ecSDave Kleikamp * free space and a low directory-to-inode ratio; if that fails, then of 705ac27a0ecSDave Kleikamp * the groups with above-average free space, that group with the fewest 706ac27a0ecSDave Kleikamp * directories already is chosen. 707ac27a0ecSDave Kleikamp * 708ac27a0ecSDave Kleikamp * For other inodes, search forward from the parent directory's block 709ac27a0ecSDave Kleikamp * group to find a free inode. 710ac27a0ecSDave Kleikamp */ 7111139575aSTheodore Ts'o struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, 7121139575aSTheodore Ts'o umode_t mode, const struct qstr *qstr, 7131139575aSTheodore Ts'o __u32 goal, uid_t *owner, int handle_type, 7141139575aSTheodore Ts'o unsigned int line_no, int nblocks) 715ac27a0ecSDave Kleikamp { 716ac27a0ecSDave Kleikamp struct super_block *sb; 7173300bedaSAneesh Kumar K.V struct buffer_head *inode_bitmap_bh = NULL; 7183300bedaSAneesh Kumar K.V struct buffer_head *group_desc_bh; 7198df9675fSTheodore Ts'o ext4_group_t ngroups, group = 0; 720ac27a0ecSDave Kleikamp unsigned long ino = 0; 721ac27a0ecSDave Kleikamp struct inode *inode; 722617ba13bSMingming Cao struct ext4_group_desc *gdp = NULL; 723617ba13bSMingming Cao struct ext4_inode_info *ei; 724617ba13bSMingming Cao struct ext4_sb_info *sbi; 72539341867SAneesh Kumar K.V int ret2, err = 0; 726ac27a0ecSDave Kleikamp struct inode *ret; 7272aa9fc4cSAvantika Mathur ext4_group_t i; 728772cb7c8SJose R. Santos ext4_group_t flex_group; 72987a39389SDarrick J. Wong struct ext4_group_info *grp; 730ac27a0ecSDave Kleikamp 731ac27a0ecSDave Kleikamp /* Cannot create files in a deleted directory */ 732ac27a0ecSDave Kleikamp if (!dir || !dir->i_nlink) 733ac27a0ecSDave Kleikamp return ERR_PTR(-EPERM); 734ac27a0ecSDave Kleikamp 735ac27a0ecSDave Kleikamp sb = dir->i_sb; 7368df9675fSTheodore Ts'o ngroups = ext4_get_groups_count(sb); 7379bffad1eSTheodore Ts'o trace_ext4_request_inode(dir, mode); 738ac27a0ecSDave Kleikamp inode = new_inode(sb); 739ac27a0ecSDave Kleikamp if (!inode) 740ac27a0ecSDave Kleikamp return ERR_PTR(-ENOMEM); 741617ba13bSMingming Cao ei = EXT4_I(inode); 742617ba13bSMingming Cao sbi = EXT4_SB(sb); 743772cb7c8SJose R. Santos 744eb9cc7e1SJan Kara /* 745eb9cc7e1SJan Kara * Initalize owners and quota early so that we don't have to account 746eb9cc7e1SJan Kara * for quota initialization worst case in standard inode creating 747eb9cc7e1SJan Kara * transaction 748eb9cc7e1SJan Kara */ 749eb9cc7e1SJan Kara if (owner) { 750eb9cc7e1SJan Kara inode->i_mode = mode; 751eb9cc7e1SJan Kara i_uid_write(inode, owner[0]); 752eb9cc7e1SJan Kara i_gid_write(inode, owner[1]); 753eb9cc7e1SJan Kara } else if (test_opt(sb, GRPID)) { 754eb9cc7e1SJan Kara inode->i_mode = mode; 755eb9cc7e1SJan Kara inode->i_uid = current_fsuid(); 756eb9cc7e1SJan Kara inode->i_gid = dir->i_gid; 757eb9cc7e1SJan Kara } else 758eb9cc7e1SJan Kara inode_init_owner(inode, dir, mode); 759eb9cc7e1SJan Kara dquot_initialize(inode); 760eb9cc7e1SJan Kara 76111013911SAndreas Dilger if (!goal) 76211013911SAndreas Dilger goal = sbi->s_inode_goal; 76311013911SAndreas Dilger 764e6462869SJohann Lombardi if (goal && goal <= le32_to_cpu(sbi->s_es->s_inodes_count)) { 76511013911SAndreas Dilger group = (goal - 1) / EXT4_INODES_PER_GROUP(sb); 76611013911SAndreas Dilger ino = (goal - 1) % EXT4_INODES_PER_GROUP(sb); 76711013911SAndreas Dilger ret2 = 0; 76811013911SAndreas Dilger goto got_group; 76911013911SAndreas Dilger } 77011013911SAndreas Dilger 7714113c4caSLukas Czerner if (S_ISDIR(mode)) 772f157a4aaSTheodore Ts'o ret2 = find_group_orlov(sb, dir, &group, mode, qstr); 7734113c4caSLukas Czerner else 774a4912123STheodore Ts'o ret2 = find_group_other(sb, dir, &group, mode); 775ac27a0ecSDave Kleikamp 776772cb7c8SJose R. Santos got_group: 777a4912123STheodore Ts'o EXT4_I(dir)->i_last_alloc_group = group; 778ac27a0ecSDave Kleikamp err = -ENOSPC; 7792aa9fc4cSAvantika Mathur if (ret2 == -1) 780ac27a0ecSDave Kleikamp goto out; 781ac27a0ecSDave Kleikamp 782119c0d44STheodore Ts'o /* 783119c0d44STheodore Ts'o * Normally we will only go through one pass of this loop, 784119c0d44STheodore Ts'o * unless we get unlucky and it turns out the group we selected 785119c0d44STheodore Ts'o * had its last inode grabbed by someone else. 786119c0d44STheodore Ts'o */ 78711013911SAndreas Dilger for (i = 0; i < ngroups; i++, ino = 0) { 788ac27a0ecSDave Kleikamp err = -EIO; 789ac27a0ecSDave Kleikamp 7903300bedaSAneesh Kumar K.V gdp = ext4_get_group_desc(sb, group, &group_desc_bh); 791ac27a0ecSDave Kleikamp if (!gdp) 792eb9cc7e1SJan Kara goto out; 793ac27a0ecSDave Kleikamp 794f2a09af6SYongqiang Yang /* 795f2a09af6SYongqiang Yang * Check free inodes count before loading bitmap. 796f2a09af6SYongqiang Yang */ 797f2a09af6SYongqiang Yang if (ext4_free_inodes_count(sb, gdp) == 0) { 798f2a09af6SYongqiang Yang if (++group == ngroups) 799f2a09af6SYongqiang Yang group = 0; 800f2a09af6SYongqiang Yang continue; 801f2a09af6SYongqiang Yang } 802f2a09af6SYongqiang Yang 80387a39389SDarrick J. Wong grp = ext4_get_group_info(sb, group); 80487a39389SDarrick J. Wong /* Skip groups with already-known suspicious inode tables */ 80587a39389SDarrick J. Wong if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { 80687a39389SDarrick J. Wong if (++group == ngroups) 80787a39389SDarrick J. Wong group = 0; 80887a39389SDarrick J. Wong continue; 80987a39389SDarrick J. Wong } 81087a39389SDarrick J. Wong 8113300bedaSAneesh Kumar K.V brelse(inode_bitmap_bh); 8123300bedaSAneesh Kumar K.V inode_bitmap_bh = ext4_read_inode_bitmap(sb, group); 81387a39389SDarrick J. Wong /* Skip groups with suspicious inode tables */ 81487a39389SDarrick J. Wong if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp) || !inode_bitmap_bh) { 81587a39389SDarrick J. Wong if (++group == ngroups) 81687a39389SDarrick J. Wong group = 0; 81787a39389SDarrick J. Wong continue; 81887a39389SDarrick J. Wong } 819ac27a0ecSDave Kleikamp 820ac27a0ecSDave Kleikamp repeat_in_this_group: 821617ba13bSMingming Cao ino = ext4_find_next_zero_bit((unsigned long *) 8223300bedaSAneesh Kumar K.V inode_bitmap_bh->b_data, 8233300bedaSAneesh Kumar K.V EXT4_INODES_PER_GROUP(sb), ino); 824a34eb503STheodore Ts'o if (ino >= EXT4_INODES_PER_GROUP(sb)) 825a34eb503STheodore Ts'o goto next_group; 826119c0d44STheodore Ts'o if (group == 0 && (ino+1) < EXT4_FIRST_INO(sb)) { 827119c0d44STheodore Ts'o ext4_error(sb, "reserved inode found cleared - " 828119c0d44STheodore Ts'o "inode=%lu", ino + 1); 829119c0d44STheodore Ts'o continue; 830119c0d44STheodore Ts'o } 83119883bd9STheodore Ts'o if ((EXT4_SB(sb)->s_journal == NULL) && 83219883bd9STheodore Ts'o recently_deleted(sb, group, ino)) { 83319883bd9STheodore Ts'o ino++; 83419883bd9STheodore Ts'o goto next_inode; 83519883bd9STheodore Ts'o } 8361139575aSTheodore Ts'o if (!handle) { 8371139575aSTheodore Ts'o BUG_ON(nblocks <= 0); 8381139575aSTheodore Ts'o handle = __ext4_journal_start_sb(dir->i_sb, line_no, 8395fe2fe89SJan Kara handle_type, nblocks, 8405fe2fe89SJan Kara 0); 8411139575aSTheodore Ts'o if (IS_ERR(handle)) { 8421139575aSTheodore Ts'o err = PTR_ERR(handle); 843eb9cc7e1SJan Kara ext4_std_error(sb, err); 844eb9cc7e1SJan Kara goto out; 8451139575aSTheodore Ts'o } 8461139575aSTheodore Ts'o } 847ffb5387eSEric Sandeen BUFFER_TRACE(inode_bitmap_bh, "get_write_access"); 848ffb5387eSEric Sandeen err = ext4_journal_get_write_access(handle, inode_bitmap_bh); 849eb9cc7e1SJan Kara if (err) { 850eb9cc7e1SJan Kara ext4_std_error(sb, err); 851eb9cc7e1SJan Kara goto out; 852eb9cc7e1SJan Kara } 853119c0d44STheodore Ts'o ext4_lock_group(sb, group); 854119c0d44STheodore Ts'o ret2 = ext4_test_and_set_bit(ino, inode_bitmap_bh->b_data); 855119c0d44STheodore Ts'o ext4_unlock_group(sb, group); 856119c0d44STheodore Ts'o ino++; /* the inode bitmap is zero-based */ 857119c0d44STheodore Ts'o if (!ret2) 858119c0d44STheodore Ts'o goto got; /* we grabbed the inode! */ 85919883bd9STheodore Ts'o next_inode: 860119c0d44STheodore Ts'o if (ino < EXT4_INODES_PER_GROUP(sb)) 861119c0d44STheodore Ts'o goto repeat_in_this_group; 862a34eb503STheodore Ts'o next_group: 863a34eb503STheodore Ts'o if (++group == ngroups) 864a34eb503STheodore Ts'o group = 0; 865ac27a0ecSDave Kleikamp } 866ac27a0ecSDave Kleikamp err = -ENOSPC; 867ac27a0ecSDave Kleikamp goto out; 868ac27a0ecSDave Kleikamp 869ac27a0ecSDave Kleikamp got: 870ffb5387eSEric Sandeen BUFFER_TRACE(inode_bitmap_bh, "call ext4_handle_dirty_metadata"); 871ffb5387eSEric Sandeen err = ext4_handle_dirty_metadata(handle, NULL, inode_bitmap_bh); 872eb9cc7e1SJan Kara if (err) { 873eb9cc7e1SJan Kara ext4_std_error(sb, err); 874eb9cc7e1SJan Kara goto out; 875eb9cc7e1SJan Kara } 876ffb5387eSEric Sandeen 87761c219f5STheodore Ts'o BUFFER_TRACE(group_desc_bh, "get_write_access"); 87861c219f5STheodore Ts'o err = ext4_journal_get_write_access(handle, group_desc_bh); 87961c219f5STheodore Ts'o if (err) { 88061c219f5STheodore Ts'o ext4_std_error(sb, err); 88161c219f5STheodore Ts'o goto out; 88261c219f5STheodore Ts'o } 88361c219f5STheodore Ts'o 884717d50e4SAndreas Dilger /* We may have to initialize the block bitmap if it isn't already */ 885feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 886717d50e4SAndreas Dilger gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { 8873300bedaSAneesh Kumar K.V struct buffer_head *block_bitmap_bh; 888717d50e4SAndreas Dilger 8893300bedaSAneesh Kumar K.V block_bitmap_bh = ext4_read_block_bitmap(sb, group); 8903300bedaSAneesh Kumar K.V BUFFER_TRACE(block_bitmap_bh, "get block bitmap access"); 8913300bedaSAneesh Kumar K.V err = ext4_journal_get_write_access(handle, block_bitmap_bh); 892717d50e4SAndreas Dilger if (err) { 8933300bedaSAneesh Kumar K.V brelse(block_bitmap_bh); 894eb9cc7e1SJan Kara ext4_std_error(sb, err); 895eb9cc7e1SJan Kara goto out; 896717d50e4SAndreas Dilger } 897717d50e4SAndreas Dilger 898fd034a84STheodore Ts'o BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap"); 899fd034a84STheodore Ts'o err = ext4_handle_dirty_metadata(handle, NULL, block_bitmap_bh); 900fd034a84STheodore Ts'o 901717d50e4SAndreas Dilger /* recheck and clear flag under lock if we still need to */ 902fd034a84STheodore Ts'o ext4_lock_group(sb, group); 903717d50e4SAndreas Dilger if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { 9043300bedaSAneesh Kumar K.V gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT); 905021b65bbSTheodore Ts'o ext4_free_group_clusters_set(sb, gdp, 906cff1dfd7STheodore Ts'o ext4_free_clusters_after_init(sb, group, gdp)); 907fa77dcfaSDarrick J. Wong ext4_block_bitmap_csum_set(sb, group, gdp, 90879f1ba49STao Ma block_bitmap_bh); 909feb0ab32SDarrick J. Wong ext4_group_desc_csum_set(sb, group, gdp); 910717d50e4SAndreas Dilger } 911955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, group); 912aeb1e5d6STheodore Ts'o brelse(block_bitmap_bh); 913717d50e4SAndreas Dilger 914eb9cc7e1SJan Kara if (err) { 915eb9cc7e1SJan Kara ext4_std_error(sb, err); 916eb9cc7e1SJan Kara goto out; 917eb9cc7e1SJan Kara } 918717d50e4SAndreas Dilger } 919119c0d44STheodore Ts'o 920119c0d44STheodore Ts'o /* Update the relevant bg descriptor fields */ 92141a246d1SDarrick J. Wong if (ext4_has_group_desc_csum(sb)) { 922119c0d44STheodore Ts'o int free; 923119c0d44STheodore Ts'o struct ext4_group_info *grp = ext4_get_group_info(sb, group); 924119c0d44STheodore Ts'o 925119c0d44STheodore Ts'o down_read(&grp->alloc_sem); /* protect vs itable lazyinit */ 926119c0d44STheodore Ts'o ext4_lock_group(sb, group); /* while we modify the bg desc */ 927119c0d44STheodore Ts'o free = EXT4_INODES_PER_GROUP(sb) - 928119c0d44STheodore Ts'o ext4_itable_unused_count(sb, gdp); 929119c0d44STheodore Ts'o if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { 930119c0d44STheodore Ts'o gdp->bg_flags &= cpu_to_le16(~EXT4_BG_INODE_UNINIT); 931119c0d44STheodore Ts'o free = 0; 932119c0d44STheodore Ts'o } 933119c0d44STheodore Ts'o /* 934119c0d44STheodore Ts'o * Check the relative inode number against the last used 935119c0d44STheodore Ts'o * relative inode number in this group. if it is greater 936119c0d44STheodore Ts'o * we need to update the bg_itable_unused count 937119c0d44STheodore Ts'o */ 938119c0d44STheodore Ts'o if (ino > free) 939119c0d44STheodore Ts'o ext4_itable_unused_set(sb, gdp, 940119c0d44STheodore Ts'o (EXT4_INODES_PER_GROUP(sb) - ino)); 941119c0d44STheodore Ts'o up_read(&grp->alloc_sem); 9426f2e9f0eSTao Ma } else { 9436f2e9f0eSTao Ma ext4_lock_group(sb, group); 944119c0d44STheodore Ts'o } 9456f2e9f0eSTao Ma 946119c0d44STheodore Ts'o ext4_free_inodes_set(sb, gdp, ext4_free_inodes_count(sb, gdp) - 1); 947119c0d44STheodore Ts'o if (S_ISDIR(mode)) { 948119c0d44STheodore Ts'o ext4_used_dirs_set(sb, gdp, ext4_used_dirs_count(sb, gdp) + 1); 949119c0d44STheodore Ts'o if (sbi->s_log_groups_per_flex) { 950119c0d44STheodore Ts'o ext4_group_t f = ext4_flex_group(sbi, group); 951119c0d44STheodore Ts'o 952119c0d44STheodore Ts'o atomic_inc(&sbi->s_flex_groups[f].used_dirs); 953119c0d44STheodore Ts'o } 954119c0d44STheodore Ts'o } 95541a246d1SDarrick J. Wong if (ext4_has_group_desc_csum(sb)) { 95641a246d1SDarrick J. Wong ext4_inode_bitmap_csum_set(sb, group, gdp, inode_bitmap_bh, 95741a246d1SDarrick J. Wong EXT4_INODES_PER_GROUP(sb) / 8); 958feb0ab32SDarrick J. Wong ext4_group_desc_csum_set(sb, group, gdp); 959119c0d44STheodore Ts'o } 9606f2e9f0eSTao Ma ext4_unlock_group(sb, group); 961119c0d44STheodore Ts'o 9623300bedaSAneesh Kumar K.V BUFFER_TRACE(group_desc_bh, "call ext4_handle_dirty_metadata"); 9633300bedaSAneesh Kumar K.V err = ext4_handle_dirty_metadata(handle, NULL, group_desc_bh); 964eb9cc7e1SJan Kara if (err) { 965eb9cc7e1SJan Kara ext4_std_error(sb, err); 966eb9cc7e1SJan Kara goto out; 967eb9cc7e1SJan Kara } 968ac27a0ecSDave Kleikamp 969ac27a0ecSDave Kleikamp percpu_counter_dec(&sbi->s_freeinodes_counter); 970ac27a0ecSDave Kleikamp if (S_ISDIR(mode)) 971ac27a0ecSDave Kleikamp percpu_counter_inc(&sbi->s_dirs_counter); 972ac27a0ecSDave Kleikamp 973772cb7c8SJose R. Santos if (sbi->s_log_groups_per_flex) { 974772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, group); 9759f24e420STheodore Ts'o atomic_dec(&sbi->s_flex_groups[flex_group].free_inodes); 976772cb7c8SJose R. Santos } 977ac27a0ecSDave Kleikamp 978717d50e4SAndreas Dilger inode->i_ino = ino + group * EXT4_INODES_PER_GROUP(sb); 979ac27a0ecSDave Kleikamp /* This is the optimal IO size (for stat), not the fs block size */ 980ac27a0ecSDave Kleikamp inode->i_blocks = 0; 981ef7f3835SKalpak Shah inode->i_mtime = inode->i_atime = inode->i_ctime = ei->i_crtime = 982ef7f3835SKalpak Shah ext4_current_time(inode); 983ac27a0ecSDave Kleikamp 984ac27a0ecSDave Kleikamp memset(ei->i_data, 0, sizeof(ei->i_data)); 985ac27a0ecSDave Kleikamp ei->i_dir_start_lookup = 0; 986ac27a0ecSDave Kleikamp ei->i_disksize = 0; 987ac27a0ecSDave Kleikamp 9884af83508SEryu Guan /* Don't inherit extent flag from directory, amongst others. */ 9892dc6b0d4SDuane Griffin ei->i_flags = 9902dc6b0d4SDuane Griffin ext4_mask_flags(mode, EXT4_I(dir)->i_flags & EXT4_FL_INHERITED); 991ac27a0ecSDave Kleikamp ei->i_file_acl = 0; 992ac27a0ecSDave Kleikamp ei->i_dtime = 0; 993ac27a0ecSDave Kleikamp ei->i_block_group = group; 994a4912123STheodore Ts'o ei->i_last_alloc_group = ~0; 995ac27a0ecSDave Kleikamp 996617ba13bSMingming Cao ext4_set_inode_flags(inode); 997ac27a0ecSDave Kleikamp if (IS_DIRSYNC(inode)) 9980390131bSFrank Mayhar ext4_handle_sync(handle); 9996b38e842SAl Viro if (insert_inode_locked(inode) < 0) { 1000acd6ad83SJan Kara /* 1001acd6ad83SJan Kara * Likely a bitmap corruption causing inode to be allocated 1002acd6ad83SJan Kara * twice. 1003acd6ad83SJan Kara */ 1004acd6ad83SJan Kara err = -EIO; 1005eb9cc7e1SJan Kara ext4_error(sb, "failed to insert inode %lu: doubly allocated?", 1006eb9cc7e1SJan Kara inode->i_ino); 1007eb9cc7e1SJan Kara goto out; 10086b38e842SAl Viro } 1009ac27a0ecSDave Kleikamp spin_lock(&sbi->s_next_gen_lock); 1010ac27a0ecSDave Kleikamp inode->i_generation = sbi->s_next_generation++; 1011ac27a0ecSDave Kleikamp spin_unlock(&sbi->s_next_gen_lock); 1012ac27a0ecSDave Kleikamp 1013814525f4SDarrick J. Wong /* Precompute checksum seed for inode metadata */ 1014814525f4SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1015814525f4SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 1016814525f4SDarrick J. Wong __u32 csum; 1017814525f4SDarrick J. Wong __le32 inum = cpu_to_le32(inode->i_ino); 1018814525f4SDarrick J. Wong __le32 gen = cpu_to_le32(inode->i_generation); 1019814525f4SDarrick J. Wong csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, 1020814525f4SDarrick J. Wong sizeof(inum)); 1021814525f4SDarrick J. Wong ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, 1022814525f4SDarrick J. Wong sizeof(gen)); 1023814525f4SDarrick J. Wong } 1024814525f4SDarrick J. Wong 1025353eb83cSTheodore Ts'o ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */ 102619f5fb7aSTheodore Ts'o ext4_set_inode_state(inode, EXT4_STATE_NEW); 1027ef7f3835SKalpak Shah 1028ef7f3835SKalpak Shah ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize; 1029ac27a0ecSDave Kleikamp 1030f08225d1STao Ma ei->i_inline_off = 0; 1031f08225d1STao Ma if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_INLINE_DATA)) 1032f08225d1STao Ma ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); 1033f08225d1STao Ma 1034ac27a0ecSDave Kleikamp ret = inode; 103563936ddaSChristoph Hellwig err = dquot_alloc_inode(inode); 103663936ddaSChristoph Hellwig if (err) 1037ac27a0ecSDave Kleikamp goto fail_drop; 1038ac27a0ecSDave Kleikamp 1039617ba13bSMingming Cao err = ext4_init_acl(handle, inode, dir); 1040ac27a0ecSDave Kleikamp if (err) 1041ac27a0ecSDave Kleikamp goto fail_free_drop; 1042ac27a0ecSDave Kleikamp 10432a7dba39SEric Paris err = ext4_init_security(handle, inode, dir, qstr); 1044ac27a0ecSDave Kleikamp if (err) 1045ac27a0ecSDave Kleikamp goto fail_free_drop; 1046ac27a0ecSDave Kleikamp 104783982b6fSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 1048e4079a11SEric Sandeen /* set extent flag only for directory, file and normal symlink*/ 1049e65187e6SAneesh Kumar K.V if (S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) { 105012e9b892SDmitry Monakhov ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS); 1051a86c6181SAlex Tomas ext4_ext_tree_init(handle, inode); 1052a86c6181SAlex Tomas } 105342bf0383SAneesh Kumar K.V } 1054ac27a0ecSDave Kleikamp 1055688f869cSTheodore Ts'o if (ext4_handle_valid(handle)) { 1056688f869cSTheodore Ts'o ei->i_sync_tid = handle->h_transaction->t_tid; 1057688f869cSTheodore Ts'o ei->i_datasync_tid = handle->h_transaction->t_tid; 1058688f869cSTheodore Ts'o } 1059688f869cSTheodore Ts'o 10608753e88fSAneesh Kumar K.V err = ext4_mark_inode_dirty(handle, inode); 10618753e88fSAneesh Kumar K.V if (err) { 10628753e88fSAneesh Kumar K.V ext4_std_error(sb, err); 10638753e88fSAneesh Kumar K.V goto fail_free_drop; 10648753e88fSAneesh Kumar K.V } 10658753e88fSAneesh Kumar K.V 1066617ba13bSMingming Cao ext4_debug("allocating inode %lu\n", inode->i_ino); 10679bffad1eSTheodore Ts'o trace_ext4_allocate_inode(inode, dir, mode); 10683300bedaSAneesh Kumar K.V brelse(inode_bitmap_bh); 1069ac27a0ecSDave Kleikamp return ret; 1070ac27a0ecSDave Kleikamp 1071ac27a0ecSDave Kleikamp fail_free_drop: 107263936ddaSChristoph Hellwig dquot_free_inode(inode); 1073ac27a0ecSDave Kleikamp fail_drop: 10746d6b77f1SMiklos Szeredi clear_nlink(inode); 10756b38e842SAl Viro unlock_new_inode(inode); 1076eb9cc7e1SJan Kara out: 1077eb9cc7e1SJan Kara dquot_drop(inode); 1078eb9cc7e1SJan Kara inode->i_flags |= S_NOQUOTA; 1079ac27a0ecSDave Kleikamp iput(inode); 10803300bedaSAneesh Kumar K.V brelse(inode_bitmap_bh); 1081ac27a0ecSDave Kleikamp return ERR_PTR(err); 1082ac27a0ecSDave Kleikamp } 1083ac27a0ecSDave Kleikamp 1084ac27a0ecSDave Kleikamp /* Verify that we are loading a valid orphan from disk */ 1085617ba13bSMingming Cao struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino) 1086ac27a0ecSDave Kleikamp { 1087617ba13bSMingming Cao unsigned long max_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count); 1088fd2d4291SAvantika Mathur ext4_group_t block_group; 1089ac27a0ecSDave Kleikamp int bit; 10901d1fe1eeSDavid Howells struct buffer_head *bitmap_bh; 1091ac27a0ecSDave Kleikamp struct inode *inode = NULL; 10921d1fe1eeSDavid Howells long err = -EIO; 1093ac27a0ecSDave Kleikamp 1094ac27a0ecSDave Kleikamp /* Error cases - e2fsck has already cleaned up for us */ 1095ac27a0ecSDave Kleikamp if (ino > max_ino) { 109612062dddSEric Sandeen ext4_warning(sb, "bad orphan ino %lu! e2fsck was run?", ino); 10971d1fe1eeSDavid Howells goto error; 1098ac27a0ecSDave Kleikamp } 1099ac27a0ecSDave Kleikamp 1100617ba13bSMingming Cao block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); 1101617ba13bSMingming Cao bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); 1102e29d1cdeSEric Sandeen bitmap_bh = ext4_read_inode_bitmap(sb, block_group); 1103ac27a0ecSDave Kleikamp if (!bitmap_bh) { 110412062dddSEric Sandeen ext4_warning(sb, "inode bitmap error for orphan %lu", ino); 11051d1fe1eeSDavid Howells goto error; 1106ac27a0ecSDave Kleikamp } 1107ac27a0ecSDave Kleikamp 1108ac27a0ecSDave Kleikamp /* Having the inode bit set should be a 100% indicator that this 1109ac27a0ecSDave Kleikamp * is a valid orphan (no e2fsck run on fs). Orphans also include 1110ac27a0ecSDave Kleikamp * inodes that were being truncated, so we can't check i_nlink==0. 1111ac27a0ecSDave Kleikamp */ 11121d1fe1eeSDavid Howells if (!ext4_test_bit(bit, bitmap_bh->b_data)) 11131d1fe1eeSDavid Howells goto bad_orphan; 11141d1fe1eeSDavid Howells 11151d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 11161d1fe1eeSDavid Howells if (IS_ERR(inode)) 11171d1fe1eeSDavid Howells goto iget_failed; 11181d1fe1eeSDavid Howells 111991ef4cafSDuane Griffin /* 112091ef4cafSDuane Griffin * If the orphans has i_nlinks > 0 then it should be able to be 112191ef4cafSDuane Griffin * truncated, otherwise it won't be removed from the orphan list 112291ef4cafSDuane Griffin * during processing and an infinite loop will result. 112391ef4cafSDuane Griffin */ 112491ef4cafSDuane Griffin if (inode->i_nlink && !ext4_can_truncate(inode)) 112591ef4cafSDuane Griffin goto bad_orphan; 112691ef4cafSDuane Griffin 11271d1fe1eeSDavid Howells if (NEXT_ORPHAN(inode) > max_ino) 11281d1fe1eeSDavid Howells goto bad_orphan; 11291d1fe1eeSDavid Howells brelse(bitmap_bh); 11301d1fe1eeSDavid Howells return inode; 11311d1fe1eeSDavid Howells 11321d1fe1eeSDavid Howells iget_failed: 11331d1fe1eeSDavid Howells err = PTR_ERR(inode); 11341d1fe1eeSDavid Howells inode = NULL; 11351d1fe1eeSDavid Howells bad_orphan: 113612062dddSEric Sandeen ext4_warning(sb, "bad orphan inode %lu! e2fsck was run?", ino); 11378de5c325STheodore Ts'o printk(KERN_WARNING "ext4_test_bit(bit=%d, block=%llu) = %d\n", 1138ac27a0ecSDave Kleikamp bit, (unsigned long long)bitmap_bh->b_blocknr, 1139617ba13bSMingming Cao ext4_test_bit(bit, bitmap_bh->b_data)); 11408de5c325STheodore Ts'o printk(KERN_WARNING "inode=%p\n", inode); 1141ac27a0ecSDave Kleikamp if (inode) { 11428de5c325STheodore Ts'o printk(KERN_WARNING "is_bad_inode(inode)=%d\n", 1143ac27a0ecSDave Kleikamp is_bad_inode(inode)); 11448de5c325STheodore Ts'o printk(KERN_WARNING "NEXT_ORPHAN(inode)=%u\n", 1145ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 11468de5c325STheodore Ts'o printk(KERN_WARNING "max_ino=%lu\n", max_ino); 11478de5c325STheodore Ts'o printk(KERN_WARNING "i_nlink=%u\n", inode->i_nlink); 1148ac27a0ecSDave Kleikamp /* Avoid freeing blocks if we got a bad deleted inode */ 11491d1fe1eeSDavid Howells if (inode->i_nlink == 0) 1150ac27a0ecSDave Kleikamp inode->i_blocks = 0; 1151ac27a0ecSDave Kleikamp iput(inode); 1152ac27a0ecSDave Kleikamp } 1153ac27a0ecSDave Kleikamp brelse(bitmap_bh); 11541d1fe1eeSDavid Howells error: 11551d1fe1eeSDavid Howells return ERR_PTR(err); 1156ac27a0ecSDave Kleikamp } 1157ac27a0ecSDave Kleikamp 1158617ba13bSMingming Cao unsigned long ext4_count_free_inodes(struct super_block *sb) 1159ac27a0ecSDave Kleikamp { 1160ac27a0ecSDave Kleikamp unsigned long desc_count; 1161617ba13bSMingming Cao struct ext4_group_desc *gdp; 11628df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 1163617ba13bSMingming Cao #ifdef EXT4FS_DEBUG 1164617ba13bSMingming Cao struct ext4_super_block *es; 1165ac27a0ecSDave Kleikamp unsigned long bitmap_count, x; 1166ac27a0ecSDave Kleikamp struct buffer_head *bitmap_bh = NULL; 1167ac27a0ecSDave Kleikamp 1168617ba13bSMingming Cao es = EXT4_SB(sb)->s_es; 1169ac27a0ecSDave Kleikamp desc_count = 0; 1170ac27a0ecSDave Kleikamp bitmap_count = 0; 1171ac27a0ecSDave Kleikamp gdp = NULL; 11728df9675fSTheodore Ts'o for (i = 0; i < ngroups; i++) { 1173617ba13bSMingming Cao gdp = ext4_get_group_desc(sb, i, NULL); 1174ac27a0ecSDave Kleikamp if (!gdp) 1175ac27a0ecSDave Kleikamp continue; 1176560671a0SAneesh Kumar K.V desc_count += ext4_free_inodes_count(sb, gdp); 1177ac27a0ecSDave Kleikamp brelse(bitmap_bh); 1178e29d1cdeSEric Sandeen bitmap_bh = ext4_read_inode_bitmap(sb, i); 1179ac27a0ecSDave Kleikamp if (!bitmap_bh) 1180ac27a0ecSDave Kleikamp continue; 1181ac27a0ecSDave Kleikamp 1182f6fb99caSTheodore Ts'o x = ext4_count_free(bitmap_bh->b_data, 1183f6fb99caSTheodore Ts'o EXT4_INODES_PER_GROUP(sb) / 8); 1184c549a95dSEric Sandeen printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n", 1185785b4b3aSPeng Tao (unsigned long) i, ext4_free_inodes_count(sb, gdp), x); 1186ac27a0ecSDave Kleikamp bitmap_count += x; 1187ac27a0ecSDave Kleikamp } 1188ac27a0ecSDave Kleikamp brelse(bitmap_bh); 11894776004fSTheodore Ts'o printk(KERN_DEBUG "ext4_count_free_inodes: " 11904776004fSTheodore Ts'o "stored = %u, computed = %lu, %lu\n", 1191ac27a0ecSDave Kleikamp le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count); 1192ac27a0ecSDave Kleikamp return desc_count; 1193ac27a0ecSDave Kleikamp #else 1194ac27a0ecSDave Kleikamp desc_count = 0; 11958df9675fSTheodore Ts'o for (i = 0; i < ngroups; i++) { 1196617ba13bSMingming Cao gdp = ext4_get_group_desc(sb, i, NULL); 1197ac27a0ecSDave Kleikamp if (!gdp) 1198ac27a0ecSDave Kleikamp continue; 1199560671a0SAneesh Kumar K.V desc_count += ext4_free_inodes_count(sb, gdp); 1200ac27a0ecSDave Kleikamp cond_resched(); 1201ac27a0ecSDave Kleikamp } 1202ac27a0ecSDave Kleikamp return desc_count; 1203ac27a0ecSDave Kleikamp #endif 1204ac27a0ecSDave Kleikamp } 1205ac27a0ecSDave Kleikamp 1206ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1207617ba13bSMingming Cao unsigned long ext4_count_dirs(struct super_block * sb) 1208ac27a0ecSDave Kleikamp { 1209ac27a0ecSDave Kleikamp unsigned long count = 0; 12108df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 1211ac27a0ecSDave Kleikamp 12128df9675fSTheodore Ts'o for (i = 0; i < ngroups; i++) { 1213617ba13bSMingming Cao struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1214ac27a0ecSDave Kleikamp if (!gdp) 1215ac27a0ecSDave Kleikamp continue; 1216560671a0SAneesh Kumar K.V count += ext4_used_dirs_count(sb, gdp); 1217ac27a0ecSDave Kleikamp } 1218ac27a0ecSDave Kleikamp return count; 1219ac27a0ecSDave Kleikamp } 1220bfff6873SLukas Czerner 1221bfff6873SLukas Czerner /* 1222bfff6873SLukas Czerner * Zeroes not yet zeroed inode table - just write zeroes through the whole 1223bfff6873SLukas Czerner * inode table. Must be called without any spinlock held. The only place 1224bfff6873SLukas Czerner * where it is called from on active part of filesystem is ext4lazyinit 1225bfff6873SLukas Czerner * thread, so we do not need any special locks, however we have to prevent 1226bfff6873SLukas Czerner * inode allocation from the current group, so we take alloc_sem lock, to 1227119c0d44STheodore Ts'o * block ext4_new_inode() until we are finished. 1228bfff6873SLukas Czerner */ 1229e0cbee3eSH Hartley Sweeten int ext4_init_inode_table(struct super_block *sb, ext4_group_t group, 1230bfff6873SLukas Czerner int barrier) 1231bfff6873SLukas Czerner { 1232bfff6873SLukas Czerner struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1233bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 1234bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 1235bfff6873SLukas Czerner struct buffer_head *group_desc_bh; 1236bfff6873SLukas Czerner handle_t *handle; 1237bfff6873SLukas Czerner ext4_fsblk_t blk; 1238bfff6873SLukas Czerner int num, ret = 0, used_blks = 0; 1239bfff6873SLukas Czerner 1240bfff6873SLukas Czerner /* This should not happen, but just to be sure check this */ 1241bfff6873SLukas Czerner if (sb->s_flags & MS_RDONLY) { 1242bfff6873SLukas Czerner ret = 1; 1243bfff6873SLukas Czerner goto out; 1244bfff6873SLukas Czerner } 1245bfff6873SLukas Czerner 1246bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, &group_desc_bh); 1247bfff6873SLukas Czerner if (!gdp) 1248bfff6873SLukas Czerner goto out; 1249bfff6873SLukas Czerner 1250bfff6873SLukas Czerner /* 1251bfff6873SLukas Czerner * We do not need to lock this, because we are the only one 1252bfff6873SLukas Czerner * handling this flag. 1253bfff6873SLukas Czerner */ 1254bfff6873SLukas Czerner if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)) 1255bfff6873SLukas Czerner goto out; 1256bfff6873SLukas Czerner 12579924a92aSTheodore Ts'o handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); 1258bfff6873SLukas Czerner if (IS_ERR(handle)) { 1259bfff6873SLukas Czerner ret = PTR_ERR(handle); 1260bfff6873SLukas Czerner goto out; 1261bfff6873SLukas Czerner } 1262bfff6873SLukas Czerner 1263bfff6873SLukas Czerner down_write(&grp->alloc_sem); 1264bfff6873SLukas Czerner /* 1265bfff6873SLukas Czerner * If inode bitmap was already initialized there may be some 1266bfff6873SLukas Czerner * used inodes so we need to skip blocks with used inodes in 1267bfff6873SLukas Czerner * inode table. 1268bfff6873SLukas Czerner */ 1269bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT))) 1270bfff6873SLukas Czerner used_blks = DIV_ROUND_UP((EXT4_INODES_PER_GROUP(sb) - 1271bfff6873SLukas Czerner ext4_itable_unused_count(sb, gdp)), 1272bfff6873SLukas Czerner sbi->s_inodes_per_block); 1273bfff6873SLukas Czerner 1274857ac889SLukas Czerner if ((used_blks < 0) || (used_blks > sbi->s_itb_per_group)) { 12751084f252STheodore Ts'o ext4_error(sb, "Something is wrong with group %u: " 12761084f252STheodore Ts'o "used itable blocks: %d; " 12771084f252STheodore Ts'o "itable unused count: %u", 1278857ac889SLukas Czerner group, used_blks, 1279857ac889SLukas Czerner ext4_itable_unused_count(sb, gdp)); 1280857ac889SLukas Czerner ret = 1; 128133853a0dSYongqiang Yang goto err_out; 1282857ac889SLukas Czerner } 1283857ac889SLukas Czerner 1284bfff6873SLukas Czerner blk = ext4_inode_table(sb, gdp) + used_blks; 1285bfff6873SLukas Czerner num = sbi->s_itb_per_group - used_blks; 1286bfff6873SLukas Czerner 1287bfff6873SLukas Czerner BUFFER_TRACE(group_desc_bh, "get_write_access"); 1288bfff6873SLukas Czerner ret = ext4_journal_get_write_access(handle, 1289bfff6873SLukas Czerner group_desc_bh); 1290bfff6873SLukas Czerner if (ret) 1291bfff6873SLukas Czerner goto err_out; 1292bfff6873SLukas Czerner 1293bfff6873SLukas Czerner /* 1294bfff6873SLukas Czerner * Skip zeroout if the inode table is full. But we set the ZEROED 1295bfff6873SLukas Czerner * flag anyway, because obviously, when it is full it does not need 1296bfff6873SLukas Czerner * further zeroing. 1297bfff6873SLukas Czerner */ 1298bfff6873SLukas Czerner if (unlikely(num == 0)) 1299bfff6873SLukas Czerner goto skip_zeroout; 1300bfff6873SLukas Czerner 1301bfff6873SLukas Czerner ext4_debug("going to zero out inode table in group %d\n", 1302bfff6873SLukas Czerner group); 1303a107e5a3STheodore Ts'o ret = sb_issue_zeroout(sb, blk, num, GFP_NOFS); 1304bfff6873SLukas Czerner if (ret < 0) 1305bfff6873SLukas Czerner goto err_out; 1306a107e5a3STheodore Ts'o if (barrier) 1307a107e5a3STheodore Ts'o blkdev_issue_flush(sb->s_bdev, GFP_NOFS, NULL); 1308bfff6873SLukas Czerner 1309bfff6873SLukas Czerner skip_zeroout: 1310bfff6873SLukas Czerner ext4_lock_group(sb, group); 1311bfff6873SLukas Czerner gdp->bg_flags |= cpu_to_le16(EXT4_BG_INODE_ZEROED); 1312feb0ab32SDarrick J. Wong ext4_group_desc_csum_set(sb, group, gdp); 1313bfff6873SLukas Czerner ext4_unlock_group(sb, group); 1314bfff6873SLukas Czerner 1315bfff6873SLukas Czerner BUFFER_TRACE(group_desc_bh, 1316bfff6873SLukas Czerner "call ext4_handle_dirty_metadata"); 1317bfff6873SLukas Czerner ret = ext4_handle_dirty_metadata(handle, NULL, 1318bfff6873SLukas Czerner group_desc_bh); 1319bfff6873SLukas Czerner 1320bfff6873SLukas Czerner err_out: 1321bfff6873SLukas Czerner up_write(&grp->alloc_sem); 1322bfff6873SLukas Czerner ext4_journal_stop(handle); 1323bfff6873SLukas Czerner out: 1324bfff6873SLukas Czerner return ret; 1325bfff6873SLukas Czerner } 1326