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> 263dcf5451SChristoph Hellwig #include "ext4.h" 273dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 28ac27a0ecSDave Kleikamp #include "xattr.h" 29ac27a0ecSDave Kleikamp #include "acl.h" 30717d50e4SAndreas Dilger #include "group.h" 31ac27a0ecSDave Kleikamp 32ac27a0ecSDave Kleikamp /* 33ac27a0ecSDave Kleikamp * ialloc.c contains the inodes allocation and deallocation routines 34ac27a0ecSDave Kleikamp */ 35ac27a0ecSDave Kleikamp 36ac27a0ecSDave Kleikamp /* 37ac27a0ecSDave Kleikamp * The free inodes are managed by bitmaps. A file system contains several 38ac27a0ecSDave Kleikamp * blocks groups. Each group contains 1 bitmap block for blocks, 1 bitmap 39ac27a0ecSDave Kleikamp * block for inodes, N blocks for the inode table and data blocks. 40ac27a0ecSDave Kleikamp * 41ac27a0ecSDave Kleikamp * The file system contains group descriptors which are located after the 42ac27a0ecSDave Kleikamp * super block. Each descriptor contains the number of the bitmap block and 43ac27a0ecSDave Kleikamp * the free blocks count in the block. 44ac27a0ecSDave Kleikamp */ 45ac27a0ecSDave Kleikamp 46717d50e4SAndreas Dilger /* 47717d50e4SAndreas Dilger * To avoid calling the atomic setbit hundreds or thousands of times, we only 48717d50e4SAndreas Dilger * need to use it within a single byte (to ensure we get endianness right). 49717d50e4SAndreas Dilger * We can use memset for the rest of the bitmap as there are no other users. 50717d50e4SAndreas Dilger */ 51717d50e4SAndreas Dilger void mark_bitmap_end(int start_bit, int end_bit, char *bitmap) 52717d50e4SAndreas Dilger { 53717d50e4SAndreas Dilger int i; 54717d50e4SAndreas Dilger 55717d50e4SAndreas Dilger if (start_bit >= end_bit) 56717d50e4SAndreas Dilger return; 57717d50e4SAndreas Dilger 58717d50e4SAndreas Dilger ext4_debug("mark end bits +%d through +%d used\n", start_bit, end_bit); 59717d50e4SAndreas Dilger for (i = start_bit; i < ((start_bit + 7) & ~7UL); i++) 60717d50e4SAndreas Dilger ext4_set_bit(i, bitmap); 61717d50e4SAndreas Dilger if (i < end_bit) 62717d50e4SAndreas Dilger memset(bitmap + (i >> 3), 0xff, (end_bit - i) >> 3); 63717d50e4SAndreas Dilger } 64717d50e4SAndreas Dilger 65717d50e4SAndreas Dilger /* Initializes an uninitialized inode bitmap */ 66fd2d4291SAvantika Mathur unsigned ext4_init_inode_bitmap(struct super_block *sb, struct buffer_head *bh, 67fd2d4291SAvantika Mathur ext4_group_t block_group, 68717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 69717d50e4SAndreas Dilger { 70717d50e4SAndreas Dilger struct ext4_sb_info *sbi = EXT4_SB(sb); 71717d50e4SAndreas Dilger 72717d50e4SAndreas Dilger J_ASSERT_BH(bh, buffer_locked(bh)); 73717d50e4SAndreas Dilger 74717d50e4SAndreas Dilger /* If checksum is bad mark all blocks and inodes use to prevent 75717d50e4SAndreas Dilger * allocation, essentially implementing a per-group read-only flag. */ 76717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, block_group, gdp)) { 77a9df9a49STheodore Ts'o ext4_error(sb, __func__, "Checksum bad for group %u", 78717d50e4SAndreas Dilger block_group); 79560671a0SAneesh Kumar K.V ext4_free_blks_set(sb, gdp, 0); 80560671a0SAneesh Kumar K.V ext4_free_inodes_set(sb, gdp, 0); 81560671a0SAneesh Kumar K.V ext4_itable_unused_set(sb, gdp, 0); 82717d50e4SAndreas Dilger memset(bh->b_data, 0xff, sb->s_blocksize); 83717d50e4SAndreas Dilger return 0; 84717d50e4SAndreas Dilger } 85717d50e4SAndreas Dilger 86717d50e4SAndreas Dilger memset(bh->b_data, 0, (EXT4_INODES_PER_GROUP(sb) + 7) / 8); 87648f5879SAneesh Kumar K.V mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), sb->s_blocksize * 8, 88717d50e4SAndreas Dilger bh->b_data); 89717d50e4SAndreas Dilger 90717d50e4SAndreas Dilger return EXT4_INODES_PER_GROUP(sb); 91717d50e4SAndreas Dilger } 92ac27a0ecSDave Kleikamp 93ac27a0ecSDave Kleikamp /* 94ac27a0ecSDave Kleikamp * Read the inode allocation bitmap for a given block_group, reading 95ac27a0ecSDave Kleikamp * into the specified slot in the superblock's bitmap cache. 96ac27a0ecSDave Kleikamp * 97ac27a0ecSDave Kleikamp * Return buffer_head of bitmap on success or NULL. 98ac27a0ecSDave Kleikamp */ 99ac27a0ecSDave Kleikamp static struct buffer_head * 100e29d1cdeSEric Sandeen ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group) 101ac27a0ecSDave Kleikamp { 102617ba13bSMingming Cao struct ext4_group_desc *desc; 103ac27a0ecSDave Kleikamp struct buffer_head *bh = NULL; 104e29d1cdeSEric Sandeen ext4_fsblk_t bitmap_blk; 105ac27a0ecSDave Kleikamp 106617ba13bSMingming Cao desc = ext4_get_group_desc(sb, block_group, NULL); 107ac27a0ecSDave Kleikamp if (!desc) 108e29d1cdeSEric Sandeen return NULL; 109e29d1cdeSEric Sandeen bitmap_blk = ext4_inode_bitmap(sb, desc); 110e29d1cdeSEric Sandeen bh = sb_getblk(sb, bitmap_blk); 111e29d1cdeSEric Sandeen if (unlikely(!bh)) { 112e29d1cdeSEric Sandeen ext4_error(sb, __func__, 113ac27a0ecSDave Kleikamp "Cannot read inode bitmap - " 114a9df9a49STheodore Ts'o "block_group = %u, inode_bitmap = %llu", 115e29d1cdeSEric Sandeen block_group, bitmap_blk); 116e29d1cdeSEric Sandeen return NULL; 117e29d1cdeSEric Sandeen } 1182ccb5fb9SAneesh Kumar K.V if (bitmap_uptodate(bh)) 119e29d1cdeSEric Sandeen return bh; 120e29d1cdeSEric Sandeen 121c806e68fSFrederic Bohe lock_buffer(bh); 1222ccb5fb9SAneesh Kumar K.V if (bitmap_uptodate(bh)) { 1232ccb5fb9SAneesh Kumar K.V unlock_buffer(bh); 1242ccb5fb9SAneesh Kumar K.V return bh; 1252ccb5fb9SAneesh Kumar K.V } 126b5f10eedSEric Sandeen spin_lock(sb_bgl_lock(EXT4_SB(sb), block_group)); 127e29d1cdeSEric Sandeen if (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { 128e29d1cdeSEric Sandeen ext4_init_inode_bitmap(sb, bh, block_group, desc); 1292ccb5fb9SAneesh Kumar K.V set_bitmap_uptodate(bh); 130e29d1cdeSEric Sandeen set_buffer_uptodate(bh); 131b5f10eedSEric Sandeen spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group)); 1323300bedaSAneesh Kumar K.V unlock_buffer(bh); 133e29d1cdeSEric Sandeen return bh; 134e29d1cdeSEric Sandeen } 135b5f10eedSEric Sandeen spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group)); 1362ccb5fb9SAneesh Kumar K.V if (buffer_uptodate(bh)) { 1372ccb5fb9SAneesh Kumar K.V /* 1382ccb5fb9SAneesh Kumar K.V * if not uninit if bh is uptodate, 1392ccb5fb9SAneesh Kumar K.V * bitmap is also uptodate 1402ccb5fb9SAneesh Kumar K.V */ 1412ccb5fb9SAneesh Kumar K.V set_bitmap_uptodate(bh); 1422ccb5fb9SAneesh Kumar K.V unlock_buffer(bh); 1432ccb5fb9SAneesh Kumar K.V return bh; 1442ccb5fb9SAneesh Kumar K.V } 1452ccb5fb9SAneesh Kumar K.V /* 1462ccb5fb9SAneesh Kumar K.V * submit the buffer_head for read. We can 1472ccb5fb9SAneesh Kumar K.V * safely mark the bitmap as uptodate now. 1482ccb5fb9SAneesh Kumar K.V * We do it here so the bitmap uptodate bit 1492ccb5fb9SAneesh Kumar K.V * get set with buffer lock held. 1502ccb5fb9SAneesh Kumar K.V */ 1512ccb5fb9SAneesh Kumar K.V set_bitmap_uptodate(bh); 152e29d1cdeSEric Sandeen if (bh_submit_read(bh) < 0) { 153e29d1cdeSEric Sandeen put_bh(bh); 154e29d1cdeSEric Sandeen ext4_error(sb, __func__, 155e29d1cdeSEric Sandeen "Cannot read inode bitmap - " 156a9df9a49STheodore Ts'o "block_group = %u, inode_bitmap = %llu", 157e29d1cdeSEric Sandeen block_group, bitmap_blk); 158e29d1cdeSEric Sandeen return NULL; 159e29d1cdeSEric Sandeen } 160ac27a0ecSDave Kleikamp return bh; 161ac27a0ecSDave Kleikamp } 162ac27a0ecSDave Kleikamp 163ac27a0ecSDave Kleikamp /* 164ac27a0ecSDave Kleikamp * NOTE! When we get the inode, we're the only people 165ac27a0ecSDave Kleikamp * that have access to it, and as such there are no 166ac27a0ecSDave Kleikamp * race conditions we have to worry about. The inode 167ac27a0ecSDave Kleikamp * is not on the hash-lists, and it cannot be reached 168ac27a0ecSDave Kleikamp * through the filesystem because the directory entry 169ac27a0ecSDave Kleikamp * has been deleted earlier. 170ac27a0ecSDave Kleikamp * 171ac27a0ecSDave Kleikamp * HOWEVER: we must make sure that we get no aliases, 172ac27a0ecSDave Kleikamp * which means that we have to call "clear_inode()" 173ac27a0ecSDave Kleikamp * _before_ we mark the inode not in use in the inode 174ac27a0ecSDave Kleikamp * bitmaps. Otherwise a newly created file might use 175ac27a0ecSDave Kleikamp * the same inode number (not actually the same pointer 176ac27a0ecSDave Kleikamp * though), and then we'd have two inodes sharing the 177ac27a0ecSDave Kleikamp * same inode number and space on the harddisk. 178ac27a0ecSDave Kleikamp */ 179617ba13bSMingming Cao void ext4_free_inode(handle_t *handle, struct inode *inode) 180ac27a0ecSDave Kleikamp { 181ac27a0ecSDave Kleikamp struct super_block *sb = inode->i_sb; 182ac27a0ecSDave Kleikamp int is_directory; 183ac27a0ecSDave Kleikamp unsigned long ino; 184ac27a0ecSDave Kleikamp struct buffer_head *bitmap_bh = NULL; 185ac27a0ecSDave Kleikamp struct buffer_head *bh2; 186fd2d4291SAvantika Mathur ext4_group_t block_group; 187ac27a0ecSDave Kleikamp unsigned long bit; 188617ba13bSMingming Cao struct ext4_group_desc *gdp; 189617ba13bSMingming Cao struct ext4_super_block *es; 190617ba13bSMingming Cao struct ext4_sb_info *sbi; 191560671a0SAneesh Kumar K.V int fatal = 0, err, count; 192772cb7c8SJose R. Santos ext4_group_t flex_group; 193ac27a0ecSDave Kleikamp 194ac27a0ecSDave Kleikamp if (atomic_read(&inode->i_count) > 1) { 1954776004fSTheodore Ts'o printk(KERN_ERR "ext4_free_inode: inode has count=%d\n", 196ac27a0ecSDave Kleikamp atomic_read(&inode->i_count)); 197ac27a0ecSDave Kleikamp return; 198ac27a0ecSDave Kleikamp } 199ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2004776004fSTheodore Ts'o printk(KERN_ERR "ext4_free_inode: inode has nlink=%d\n", 201ac27a0ecSDave Kleikamp inode->i_nlink); 202ac27a0ecSDave Kleikamp return; 203ac27a0ecSDave Kleikamp } 204ac27a0ecSDave Kleikamp if (!sb) { 2054776004fSTheodore Ts'o printk(KERN_ERR "ext4_free_inode: inode on " 2064776004fSTheodore Ts'o "nonexistent device\n"); 207ac27a0ecSDave Kleikamp return; 208ac27a0ecSDave Kleikamp } 209617ba13bSMingming Cao sbi = EXT4_SB(sb); 210ac27a0ecSDave Kleikamp 211ac27a0ecSDave Kleikamp ino = inode->i_ino; 212617ba13bSMingming Cao ext4_debug("freeing inode %lu\n", ino); 213*ba80b101STheodore Ts'o trace_mark(ext4_free_inode, 214*ba80b101STheodore Ts'o "dev %s ino %lu mode %d uid %lu gid %lu bocks %llu", 215*ba80b101STheodore Ts'o sb->s_id, inode->i_ino, inode->i_mode, 216*ba80b101STheodore Ts'o (unsigned long) inode->i_uid, (unsigned long) inode->i_gid, 217*ba80b101STheodore Ts'o (unsigned long long) inode->i_blocks); 218ac27a0ecSDave Kleikamp 219ac27a0ecSDave Kleikamp /* 220ac27a0ecSDave Kleikamp * Note: we must free any quota before locking the superblock, 221ac27a0ecSDave Kleikamp * as writing the quota to disk may need the lock as well. 222ac27a0ecSDave Kleikamp */ 223ac27a0ecSDave Kleikamp DQUOT_INIT(inode); 224617ba13bSMingming Cao ext4_xattr_delete_inode(handle, inode); 225ac27a0ecSDave Kleikamp DQUOT_FREE_INODE(inode); 226ac27a0ecSDave Kleikamp DQUOT_DROP(inode); 227ac27a0ecSDave Kleikamp 228ac27a0ecSDave Kleikamp is_directory = S_ISDIR(inode->i_mode); 229ac27a0ecSDave Kleikamp 230ac27a0ecSDave Kleikamp /* Do this BEFORE marking the inode not in use or returning an error */ 231ac27a0ecSDave Kleikamp clear_inode(inode); 232ac27a0ecSDave Kleikamp 233617ba13bSMingming Cao es = EXT4_SB(sb)->s_es; 234617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) { 235617ba13bSMingming Cao ext4_error(sb, "ext4_free_inode", 236ac27a0ecSDave Kleikamp "reserved or nonexistent inode %lu", ino); 237ac27a0ecSDave Kleikamp goto error_return; 238ac27a0ecSDave Kleikamp } 239617ba13bSMingming Cao block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); 240617ba13bSMingming Cao bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); 241e29d1cdeSEric Sandeen bitmap_bh = ext4_read_inode_bitmap(sb, block_group); 242ac27a0ecSDave Kleikamp if (!bitmap_bh) 243ac27a0ecSDave Kleikamp goto error_return; 244ac27a0ecSDave Kleikamp 245ac27a0ecSDave Kleikamp BUFFER_TRACE(bitmap_bh, "get_write_access"); 246617ba13bSMingming Cao fatal = ext4_journal_get_write_access(handle, bitmap_bh); 247ac27a0ecSDave Kleikamp if (fatal) 248ac27a0ecSDave Kleikamp goto error_return; 249ac27a0ecSDave Kleikamp 250ac27a0ecSDave Kleikamp /* Ok, now we can actually update the inode bitmaps.. */ 251617ba13bSMingming Cao if (!ext4_clear_bit_atomic(sb_bgl_lock(sbi, block_group), 252ac27a0ecSDave Kleikamp bit, bitmap_bh->b_data)) 253617ba13bSMingming Cao ext4_error(sb, "ext4_free_inode", 254ac27a0ecSDave Kleikamp "bit already cleared for inode %lu", ino); 255ac27a0ecSDave Kleikamp else { 256617ba13bSMingming Cao gdp = ext4_get_group_desc(sb, block_group, &bh2); 257ac27a0ecSDave Kleikamp 258ac27a0ecSDave Kleikamp BUFFER_TRACE(bh2, "get_write_access"); 259617ba13bSMingming Cao fatal = ext4_journal_get_write_access(handle, bh2); 260ac27a0ecSDave Kleikamp if (fatal) goto error_return; 261ac27a0ecSDave Kleikamp 262ac27a0ecSDave Kleikamp if (gdp) { 263ac27a0ecSDave Kleikamp spin_lock(sb_bgl_lock(sbi, block_group)); 264560671a0SAneesh Kumar K.V count = ext4_free_inodes_count(sb, gdp) + 1; 265560671a0SAneesh Kumar K.V ext4_free_inodes_set(sb, gdp, count); 266560671a0SAneesh Kumar K.V if (is_directory) { 267560671a0SAneesh Kumar K.V count = ext4_used_dirs_count(sb, gdp) - 1; 268560671a0SAneesh Kumar K.V ext4_used_dirs_set(sb, gdp, count); 269560671a0SAneesh Kumar K.V } 270717d50e4SAndreas Dilger gdp->bg_checksum = ext4_group_desc_csum(sbi, 271717d50e4SAndreas Dilger block_group, gdp); 272ac27a0ecSDave Kleikamp spin_unlock(sb_bgl_lock(sbi, block_group)); 273ac27a0ecSDave Kleikamp percpu_counter_inc(&sbi->s_freeinodes_counter); 274ac27a0ecSDave Kleikamp if (is_directory) 275ac27a0ecSDave Kleikamp percpu_counter_dec(&sbi->s_dirs_counter); 276ac27a0ecSDave Kleikamp 277772cb7c8SJose R. Santos if (sbi->s_log_groups_per_flex) { 278772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, block_group); 279772cb7c8SJose R. Santos spin_lock(sb_bgl_lock(sbi, flex_group)); 280772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_inodes++; 281772cb7c8SJose R. Santos spin_unlock(sb_bgl_lock(sbi, flex_group)); 282772cb7c8SJose R. Santos } 283ac27a0ecSDave Kleikamp } 2840390131bSFrank Mayhar BUFFER_TRACE(bh2, "call ext4_handle_dirty_metadata"); 2850390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh2); 286ac27a0ecSDave Kleikamp if (!fatal) fatal = err; 287ac27a0ecSDave Kleikamp } 2880390131bSFrank Mayhar BUFFER_TRACE(bitmap_bh, "call ext4_handle_dirty_metadata"); 2890390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh); 290ac27a0ecSDave Kleikamp if (!fatal) 291ac27a0ecSDave Kleikamp fatal = err; 292ac27a0ecSDave Kleikamp sb->s_dirt = 1; 293ac27a0ecSDave Kleikamp error_return: 294ac27a0ecSDave Kleikamp brelse(bitmap_bh); 295617ba13bSMingming Cao ext4_std_error(sb, fatal); 296ac27a0ecSDave Kleikamp } 297ac27a0ecSDave Kleikamp 298ac27a0ecSDave Kleikamp /* 299ac27a0ecSDave Kleikamp * There are two policies for allocating an inode. If the new inode is 300ac27a0ecSDave Kleikamp * a directory, then a forward search is made for a block group with both 301ac27a0ecSDave Kleikamp * free space and a low directory-to-inode ratio; if that fails, then of 302ac27a0ecSDave Kleikamp * the groups with above-average free space, that group with the fewest 303ac27a0ecSDave Kleikamp * directories already is chosen. 304ac27a0ecSDave Kleikamp * 305ac27a0ecSDave Kleikamp * For other inodes, search forward from the parent directory\'s block 306ac27a0ecSDave Kleikamp * group to find a free inode. 307ac27a0ecSDave Kleikamp */ 3082aa9fc4cSAvantika Mathur static int find_group_dir(struct super_block *sb, struct inode *parent, 3092aa9fc4cSAvantika Mathur ext4_group_t *best_group) 310ac27a0ecSDave Kleikamp { 311fd2d4291SAvantika Mathur ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 312ac27a0ecSDave Kleikamp unsigned int freei, avefreei; 313617ba13bSMingming Cao struct ext4_group_desc *desc, *best_desc = NULL; 3142aa9fc4cSAvantika Mathur ext4_group_t group; 3152aa9fc4cSAvantika Mathur int ret = -1; 316ac27a0ecSDave Kleikamp 317617ba13bSMingming Cao freei = percpu_counter_read_positive(&EXT4_SB(sb)->s_freeinodes_counter); 318ac27a0ecSDave Kleikamp avefreei = freei / ngroups; 319ac27a0ecSDave Kleikamp 320ac27a0ecSDave Kleikamp for (group = 0; group < ngroups; group++) { 321ef2fb679SEric Sandeen desc = ext4_get_group_desc(sb, group, NULL); 322560671a0SAneesh Kumar K.V if (!desc || !ext4_free_inodes_count(sb, desc)) 323ac27a0ecSDave Kleikamp continue; 324560671a0SAneesh Kumar K.V if (ext4_free_inodes_count(sb, desc) < avefreei) 325ac27a0ecSDave Kleikamp continue; 326ac27a0ecSDave Kleikamp if (!best_desc || 327560671a0SAneesh Kumar K.V (ext4_free_blks_count(sb, desc) > 328560671a0SAneesh Kumar K.V ext4_free_blks_count(sb, best_desc))) { 3292aa9fc4cSAvantika Mathur *best_group = group; 330ac27a0ecSDave Kleikamp best_desc = desc; 3312aa9fc4cSAvantika Mathur ret = 0; 332ac27a0ecSDave Kleikamp } 333ac27a0ecSDave Kleikamp } 3342aa9fc4cSAvantika Mathur return ret; 335ac27a0ecSDave Kleikamp } 336ac27a0ecSDave Kleikamp 337772cb7c8SJose R. Santos #define free_block_ratio 10 338772cb7c8SJose R. Santos 339772cb7c8SJose R. Santos static int find_group_flex(struct super_block *sb, struct inode *parent, 340772cb7c8SJose R. Santos ext4_group_t *best_group) 341772cb7c8SJose R. Santos { 342772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 343772cb7c8SJose R. Santos struct ext4_group_desc *desc; 344772cb7c8SJose R. Santos struct buffer_head *bh; 345772cb7c8SJose R. Santos struct flex_groups *flex_group = sbi->s_flex_groups; 346772cb7c8SJose R. Santos ext4_group_t parent_group = EXT4_I(parent)->i_block_group; 347772cb7c8SJose R. Santos ext4_group_t parent_fbg_group = ext4_flex_group(sbi, parent_group); 348772cb7c8SJose R. Santos ext4_group_t ngroups = sbi->s_groups_count; 349772cb7c8SJose R. Santos int flex_size = ext4_flex_bg_size(sbi); 350772cb7c8SJose R. Santos ext4_group_t best_flex = parent_fbg_group; 351772cb7c8SJose R. Santos int blocks_per_flex = sbi->s_blocks_per_group * flex_size; 352772cb7c8SJose R. Santos int flexbg_free_blocks; 353772cb7c8SJose R. Santos int flex_freeb_ratio; 354772cb7c8SJose R. Santos ext4_group_t n_fbg_groups; 355772cb7c8SJose R. Santos ext4_group_t i; 356772cb7c8SJose R. Santos 357772cb7c8SJose R. Santos n_fbg_groups = (sbi->s_groups_count + flex_size - 1) >> 358772cb7c8SJose R. Santos sbi->s_log_groups_per_flex; 359772cb7c8SJose R. Santos 360772cb7c8SJose R. Santos find_close_to_parent: 361772cb7c8SJose R. Santos flexbg_free_blocks = flex_group[best_flex].free_blocks; 362772cb7c8SJose R. Santos flex_freeb_ratio = flexbg_free_blocks * 100 / blocks_per_flex; 363772cb7c8SJose R. Santos if (flex_group[best_flex].free_inodes && 364772cb7c8SJose R. Santos flex_freeb_ratio > free_block_ratio) 365772cb7c8SJose R. Santos goto found_flexbg; 366772cb7c8SJose R. Santos 367772cb7c8SJose R. Santos if (best_flex && best_flex == parent_fbg_group) { 368772cb7c8SJose R. Santos best_flex--; 369772cb7c8SJose R. Santos goto find_close_to_parent; 370772cb7c8SJose R. Santos } 371772cb7c8SJose R. Santos 372772cb7c8SJose R. Santos for (i = 0; i < n_fbg_groups; i++) { 373772cb7c8SJose R. Santos if (i == parent_fbg_group || i == parent_fbg_group - 1) 374772cb7c8SJose R. Santos continue; 375772cb7c8SJose R. Santos 376772cb7c8SJose R. Santos flexbg_free_blocks = flex_group[i].free_blocks; 377772cb7c8SJose R. Santos flex_freeb_ratio = flexbg_free_blocks * 100 / blocks_per_flex; 378772cb7c8SJose R. Santos 379772cb7c8SJose R. Santos if (flex_freeb_ratio > free_block_ratio && 380772cb7c8SJose R. Santos flex_group[i].free_inodes) { 381772cb7c8SJose R. Santos best_flex = i; 382772cb7c8SJose R. Santos goto found_flexbg; 383772cb7c8SJose R. Santos } 384772cb7c8SJose R. Santos 385c001077fSEric Sandeen if (flex_group[best_flex].free_inodes == 0 || 386772cb7c8SJose R. Santos (flex_group[i].free_blocks > 387772cb7c8SJose R. Santos flex_group[best_flex].free_blocks && 388772cb7c8SJose R. Santos flex_group[i].free_inodes)) 389772cb7c8SJose R. Santos best_flex = i; 390772cb7c8SJose R. Santos } 391772cb7c8SJose R. Santos 392772cb7c8SJose R. Santos if (!flex_group[best_flex].free_inodes || 393772cb7c8SJose R. Santos !flex_group[best_flex].free_blocks) 394772cb7c8SJose R. Santos return -1; 395772cb7c8SJose R. Santos 396772cb7c8SJose R. Santos found_flexbg: 397772cb7c8SJose R. Santos for (i = best_flex * flex_size; i < ngroups && 398772cb7c8SJose R. Santos i < (best_flex + 1) * flex_size; i++) { 399772cb7c8SJose R. Santos desc = ext4_get_group_desc(sb, i, &bh); 400560671a0SAneesh Kumar K.V if (ext4_free_inodes_count(sb, desc)) { 401772cb7c8SJose R. Santos *best_group = i; 402772cb7c8SJose R. Santos goto out; 403772cb7c8SJose R. Santos } 404772cb7c8SJose R. Santos } 405772cb7c8SJose R. Santos 406772cb7c8SJose R. Santos return -1; 407772cb7c8SJose R. Santos out: 408772cb7c8SJose R. Santos return 0; 409772cb7c8SJose R. Santos } 410772cb7c8SJose R. Santos 411ac27a0ecSDave Kleikamp /* 412ac27a0ecSDave Kleikamp * Orlov's allocator for directories. 413ac27a0ecSDave Kleikamp * 414ac27a0ecSDave Kleikamp * We always try to spread first-level directories. 415ac27a0ecSDave Kleikamp * 416ac27a0ecSDave Kleikamp * If there are blockgroups with both free inodes and free blocks counts 417ac27a0ecSDave Kleikamp * not worse than average we return one with smallest directory count. 418ac27a0ecSDave Kleikamp * Otherwise we simply return a random group. 419ac27a0ecSDave Kleikamp * 420ac27a0ecSDave Kleikamp * For the rest rules look so: 421ac27a0ecSDave Kleikamp * 422ac27a0ecSDave Kleikamp * It's OK to put directory into a group unless 423ac27a0ecSDave Kleikamp * it has too many directories already (max_dirs) or 424ac27a0ecSDave Kleikamp * it has too few free inodes left (min_inodes) or 425ac27a0ecSDave Kleikamp * it has too few free blocks left (min_blocks) or 426ac27a0ecSDave Kleikamp * it's already running too large debt (max_debt). 4271cc8dcf5SBenoit Boissinot * Parent's group is preferred, if it doesn't satisfy these 428ac27a0ecSDave Kleikamp * conditions we search cyclically through the rest. If none 429ac27a0ecSDave Kleikamp * of the groups look good we just look for a group with more 430ac27a0ecSDave Kleikamp * free inodes than average (starting at parent's group). 431ac27a0ecSDave Kleikamp * 432ac27a0ecSDave Kleikamp * Debt is incremented each time we allocate a directory and decremented 433ac27a0ecSDave Kleikamp * when we allocate an inode, within 0--255. 434ac27a0ecSDave Kleikamp */ 435ac27a0ecSDave Kleikamp 436ac27a0ecSDave Kleikamp #define INODE_COST 64 437ac27a0ecSDave Kleikamp #define BLOCK_COST 256 438ac27a0ecSDave Kleikamp 4392aa9fc4cSAvantika Mathur static int find_group_orlov(struct super_block *sb, struct inode *parent, 4402aa9fc4cSAvantika Mathur ext4_group_t *group) 441ac27a0ecSDave Kleikamp { 442fd2d4291SAvantika Mathur ext4_group_t parent_group = EXT4_I(parent)->i_block_group; 443617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 444617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 445fd2d4291SAvantika Mathur ext4_group_t ngroups = sbi->s_groups_count; 446617ba13bSMingming Cao int inodes_per_group = EXT4_INODES_PER_GROUP(sb); 447ac27a0ecSDave Kleikamp unsigned int freei, avefreei; 448617ba13bSMingming Cao ext4_fsblk_t freeb, avefreeb; 449617ba13bSMingming Cao ext4_fsblk_t blocks_per_dir; 450ac27a0ecSDave Kleikamp unsigned int ndirs; 451ac27a0ecSDave Kleikamp int max_debt, max_dirs, min_inodes; 452617ba13bSMingming Cao ext4_grpblk_t min_blocks; 4532aa9fc4cSAvantika Mathur ext4_group_t i; 454617ba13bSMingming Cao struct ext4_group_desc *desc; 455ac27a0ecSDave Kleikamp 456ac27a0ecSDave Kleikamp freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter); 457ac27a0ecSDave Kleikamp avefreei = freei / ngroups; 458ac27a0ecSDave Kleikamp freeb = percpu_counter_read_positive(&sbi->s_freeblocks_counter); 4593a5b2ecdSMingming Cao avefreeb = freeb; 460f4e5bc24SAndrew Morton do_div(avefreeb, ngroups); 461ac27a0ecSDave Kleikamp ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter); 462ac27a0ecSDave Kleikamp 463ac27a0ecSDave Kleikamp if ((parent == sb->s_root->d_inode) || 464617ba13bSMingming Cao (EXT4_I(parent)->i_flags & EXT4_TOPDIR_FL)) { 465ac27a0ecSDave Kleikamp int best_ndir = inodes_per_group; 4662aa9fc4cSAvantika Mathur ext4_group_t grp; 4672aa9fc4cSAvantika Mathur int ret = -1; 468ac27a0ecSDave Kleikamp 4692aa9fc4cSAvantika Mathur get_random_bytes(&grp, sizeof(grp)); 4702aa9fc4cSAvantika Mathur parent_group = (unsigned)grp % ngroups; 471ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4722aa9fc4cSAvantika Mathur grp = (parent_group + i) % ngroups; 4732aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, grp, NULL); 474560671a0SAneesh Kumar K.V if (!desc || !ext4_free_inodes_count(sb, desc)) 475ac27a0ecSDave Kleikamp continue; 476560671a0SAneesh Kumar K.V if (ext4_used_dirs_count(sb, desc) >= best_ndir) 477ac27a0ecSDave Kleikamp continue; 478560671a0SAneesh Kumar K.V if (ext4_free_inodes_count(sb, desc) < avefreei) 479ac27a0ecSDave Kleikamp continue; 480560671a0SAneesh Kumar K.V if (ext4_free_blks_count(sb, desc) < avefreeb) 481ac27a0ecSDave Kleikamp continue; 4822aa9fc4cSAvantika Mathur *group = grp; 4832aa9fc4cSAvantika Mathur ret = 0; 484560671a0SAneesh Kumar K.V best_ndir = ext4_used_dirs_count(sb, desc); 485ac27a0ecSDave Kleikamp } 4862aa9fc4cSAvantika Mathur if (ret == 0) 4872aa9fc4cSAvantika Mathur return ret; 488ac27a0ecSDave Kleikamp goto fallback; 489ac27a0ecSDave Kleikamp } 490ac27a0ecSDave Kleikamp 491bd81d8eeSLaurent Vivier blocks_per_dir = ext4_blocks_count(es) - freeb; 492f4e5bc24SAndrew Morton do_div(blocks_per_dir, ndirs); 493ac27a0ecSDave Kleikamp 494ac27a0ecSDave Kleikamp max_dirs = ndirs / ngroups + inodes_per_group / 16; 495ac27a0ecSDave Kleikamp min_inodes = avefreei - inodes_per_group / 4; 496617ba13bSMingming Cao min_blocks = avefreeb - EXT4_BLOCKS_PER_GROUP(sb) / 4; 497ac27a0ecSDave Kleikamp 4983a5b2ecdSMingming Cao max_debt = EXT4_BLOCKS_PER_GROUP(sb); 499f4e5bc24SAndrew Morton max_debt /= max_t(int, blocks_per_dir, BLOCK_COST); 500ac27a0ecSDave Kleikamp if (max_debt * INODE_COST > inodes_per_group) 501ac27a0ecSDave Kleikamp max_debt = inodes_per_group / INODE_COST; 502ac27a0ecSDave Kleikamp if (max_debt > 255) 503ac27a0ecSDave Kleikamp max_debt = 255; 504ac27a0ecSDave Kleikamp if (max_debt == 0) 505ac27a0ecSDave Kleikamp max_debt = 1; 506ac27a0ecSDave Kleikamp 507ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 5082aa9fc4cSAvantika Mathur *group = (parent_group + i) % ngroups; 5092aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 510560671a0SAneesh Kumar K.V if (!desc || !ext4_free_inodes_count(sb, desc)) 511ac27a0ecSDave Kleikamp continue; 512560671a0SAneesh Kumar K.V if (ext4_used_dirs_count(sb, desc) >= max_dirs) 513ac27a0ecSDave Kleikamp continue; 514560671a0SAneesh Kumar K.V if (ext4_free_inodes_count(sb, desc) < min_inodes) 515ac27a0ecSDave Kleikamp continue; 516560671a0SAneesh Kumar K.V if (ext4_free_blks_count(sb, desc) < min_blocks) 517ac27a0ecSDave Kleikamp continue; 5182aa9fc4cSAvantika Mathur return 0; 519ac27a0ecSDave Kleikamp } 520ac27a0ecSDave Kleikamp 521ac27a0ecSDave Kleikamp fallback: 522ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 5232aa9fc4cSAvantika Mathur *group = (parent_group + i) % ngroups; 5242aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 525560671a0SAneesh Kumar K.V if (desc && ext4_free_inodes_count(sb, desc) && 526560671a0SAneesh Kumar K.V ext4_free_inodes_count(sb, desc) >= avefreei) 5272aa9fc4cSAvantika Mathur return 0; 528ac27a0ecSDave Kleikamp } 529ac27a0ecSDave Kleikamp 530ac27a0ecSDave Kleikamp if (avefreei) { 531ac27a0ecSDave Kleikamp /* 532ac27a0ecSDave Kleikamp * The free-inodes counter is approximate, and for really small 533ac27a0ecSDave Kleikamp * filesystems the above test can fail to find any blockgroups 534ac27a0ecSDave Kleikamp */ 535ac27a0ecSDave Kleikamp avefreei = 0; 536ac27a0ecSDave Kleikamp goto fallback; 537ac27a0ecSDave Kleikamp } 538ac27a0ecSDave Kleikamp 539ac27a0ecSDave Kleikamp return -1; 540ac27a0ecSDave Kleikamp } 541ac27a0ecSDave Kleikamp 5422aa9fc4cSAvantika Mathur static int find_group_other(struct super_block *sb, struct inode *parent, 5432aa9fc4cSAvantika Mathur ext4_group_t *group) 544ac27a0ecSDave Kleikamp { 545fd2d4291SAvantika Mathur ext4_group_t parent_group = EXT4_I(parent)->i_block_group; 546fd2d4291SAvantika Mathur ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 547617ba13bSMingming Cao struct ext4_group_desc *desc; 5482aa9fc4cSAvantika Mathur ext4_group_t i; 549ac27a0ecSDave Kleikamp 550ac27a0ecSDave Kleikamp /* 551ac27a0ecSDave Kleikamp * Try to place the inode in its parent directory 552ac27a0ecSDave Kleikamp */ 5532aa9fc4cSAvantika Mathur *group = parent_group; 5542aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 555560671a0SAneesh Kumar K.V if (desc && ext4_free_inodes_count(sb, desc) && 556560671a0SAneesh Kumar K.V ext4_free_blks_count(sb, desc)) 5572aa9fc4cSAvantika Mathur return 0; 558ac27a0ecSDave Kleikamp 559ac27a0ecSDave Kleikamp /* 560ac27a0ecSDave Kleikamp * We're going to place this inode in a different blockgroup from its 561ac27a0ecSDave Kleikamp * parent. We want to cause files in a common directory to all land in 562ac27a0ecSDave Kleikamp * the same blockgroup. But we want files which are in a different 563ac27a0ecSDave Kleikamp * directory which shares a blockgroup with our parent to land in a 564ac27a0ecSDave Kleikamp * different blockgroup. 565ac27a0ecSDave Kleikamp * 566ac27a0ecSDave Kleikamp * So add our directory's i_ino into the starting point for the hash. 567ac27a0ecSDave Kleikamp */ 5682aa9fc4cSAvantika Mathur *group = (*group + parent->i_ino) % ngroups; 569ac27a0ecSDave Kleikamp 570ac27a0ecSDave Kleikamp /* 571ac27a0ecSDave Kleikamp * Use a quadratic hash to find a group with a free inode and some free 572ac27a0ecSDave Kleikamp * blocks. 573ac27a0ecSDave Kleikamp */ 574ac27a0ecSDave Kleikamp for (i = 1; i < ngroups; i <<= 1) { 5752aa9fc4cSAvantika Mathur *group += i; 5762aa9fc4cSAvantika Mathur if (*group >= ngroups) 5772aa9fc4cSAvantika Mathur *group -= ngroups; 5782aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 579560671a0SAneesh Kumar K.V if (desc && ext4_free_inodes_count(sb, desc) && 580560671a0SAneesh Kumar K.V ext4_free_blks_count(sb, desc)) 5812aa9fc4cSAvantika Mathur return 0; 582ac27a0ecSDave Kleikamp } 583ac27a0ecSDave Kleikamp 584ac27a0ecSDave Kleikamp /* 585ac27a0ecSDave Kleikamp * That failed: try linear search for a free inode, even if that group 586ac27a0ecSDave Kleikamp * has no free blocks. 587ac27a0ecSDave Kleikamp */ 5882aa9fc4cSAvantika Mathur *group = parent_group; 589ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 5902aa9fc4cSAvantika Mathur if (++*group >= ngroups) 5912aa9fc4cSAvantika Mathur *group = 0; 5922aa9fc4cSAvantika Mathur desc = ext4_get_group_desc(sb, *group, NULL); 593560671a0SAneesh Kumar K.V if (desc && ext4_free_inodes_count(sb, desc)) 5942aa9fc4cSAvantika Mathur return 0; 595ac27a0ecSDave Kleikamp } 596ac27a0ecSDave Kleikamp 597ac27a0ecSDave Kleikamp return -1; 598ac27a0ecSDave Kleikamp } 599ac27a0ecSDave Kleikamp 600ac27a0ecSDave Kleikamp /* 60139341867SAneesh Kumar K.V * claim the inode from the inode bitmap. If the group 60239341867SAneesh Kumar K.V * is uninit we need to take the groups's sb_bgl_lock 60339341867SAneesh Kumar K.V * and clear the uninit flag. The inode bitmap update 60439341867SAneesh Kumar K.V * and group desc uninit flag clear should be done 60539341867SAneesh Kumar K.V * after holding sb_bgl_lock so that ext4_read_inode_bitmap 60639341867SAneesh Kumar K.V * doesn't race with the ext4_claim_inode 60739341867SAneesh Kumar K.V */ 60839341867SAneesh Kumar K.V static int ext4_claim_inode(struct super_block *sb, 60939341867SAneesh Kumar K.V struct buffer_head *inode_bitmap_bh, 61039341867SAneesh Kumar K.V unsigned long ino, ext4_group_t group, int mode) 61139341867SAneesh Kumar K.V { 61239341867SAneesh Kumar K.V int free = 0, retval = 0, count; 61339341867SAneesh Kumar K.V struct ext4_sb_info *sbi = EXT4_SB(sb); 61439341867SAneesh Kumar K.V struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 61539341867SAneesh Kumar K.V 61639341867SAneesh Kumar K.V spin_lock(sb_bgl_lock(sbi, group)); 61739341867SAneesh Kumar K.V if (ext4_set_bit(ino, inode_bitmap_bh->b_data)) { 61839341867SAneesh Kumar K.V /* not a free inode */ 61939341867SAneesh Kumar K.V retval = 1; 62039341867SAneesh Kumar K.V goto err_ret; 62139341867SAneesh Kumar K.V } 62239341867SAneesh Kumar K.V ino++; 62339341867SAneesh Kumar K.V if ((group == 0 && ino < EXT4_FIRST_INO(sb)) || 62439341867SAneesh Kumar K.V ino > EXT4_INODES_PER_GROUP(sb)) { 62539341867SAneesh Kumar K.V spin_unlock(sb_bgl_lock(sbi, group)); 62639341867SAneesh Kumar K.V ext4_error(sb, __func__, 62739341867SAneesh Kumar K.V "reserved inode or inode > inodes count - " 62839341867SAneesh Kumar K.V "block_group = %u, inode=%lu", group, 62939341867SAneesh Kumar K.V ino + group * EXT4_INODES_PER_GROUP(sb)); 63039341867SAneesh Kumar K.V return 1; 63139341867SAneesh Kumar K.V } 63239341867SAneesh Kumar K.V /* If we didn't allocate from within the initialized part of the inode 63339341867SAneesh Kumar K.V * table then we need to initialize up to this inode. */ 63439341867SAneesh Kumar K.V if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 63539341867SAneesh Kumar K.V 63639341867SAneesh Kumar K.V if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { 63739341867SAneesh Kumar K.V gdp->bg_flags &= cpu_to_le16(~EXT4_BG_INODE_UNINIT); 63839341867SAneesh Kumar K.V /* When marking the block group with 63939341867SAneesh Kumar K.V * ~EXT4_BG_INODE_UNINIT we don't want to depend 64039341867SAneesh Kumar K.V * on the value of bg_itable_unused even though 64139341867SAneesh Kumar K.V * mke2fs could have initialized the same for us. 64239341867SAneesh Kumar K.V * Instead we calculated the value below 64339341867SAneesh Kumar K.V */ 64439341867SAneesh Kumar K.V 64539341867SAneesh Kumar K.V free = 0; 64639341867SAneesh Kumar K.V } else { 64739341867SAneesh Kumar K.V free = EXT4_INODES_PER_GROUP(sb) - 64839341867SAneesh Kumar K.V ext4_itable_unused_count(sb, gdp); 64939341867SAneesh Kumar K.V } 65039341867SAneesh Kumar K.V 65139341867SAneesh Kumar K.V /* 65239341867SAneesh Kumar K.V * Check the relative inode number against the last used 65339341867SAneesh Kumar K.V * relative inode number in this group. if it is greater 65439341867SAneesh Kumar K.V * we need to update the bg_itable_unused count 65539341867SAneesh Kumar K.V * 65639341867SAneesh Kumar K.V */ 65739341867SAneesh Kumar K.V if (ino > free) 65839341867SAneesh Kumar K.V ext4_itable_unused_set(sb, gdp, 65939341867SAneesh Kumar K.V (EXT4_INODES_PER_GROUP(sb) - ino)); 66039341867SAneesh Kumar K.V } 66139341867SAneesh Kumar K.V count = ext4_free_inodes_count(sb, gdp) - 1; 66239341867SAneesh Kumar K.V ext4_free_inodes_set(sb, gdp, count); 66339341867SAneesh Kumar K.V if (S_ISDIR(mode)) { 66439341867SAneesh Kumar K.V count = ext4_used_dirs_count(sb, gdp) + 1; 66539341867SAneesh Kumar K.V ext4_used_dirs_set(sb, gdp, count); 66639341867SAneesh Kumar K.V } 66739341867SAneesh Kumar K.V gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp); 66839341867SAneesh Kumar K.V err_ret: 66939341867SAneesh Kumar K.V spin_unlock(sb_bgl_lock(sbi, group)); 67039341867SAneesh Kumar K.V return retval; 67139341867SAneesh Kumar K.V } 67239341867SAneesh Kumar K.V 67339341867SAneesh Kumar K.V /* 674ac27a0ecSDave Kleikamp * There are two policies for allocating an inode. If the new inode is 675ac27a0ecSDave Kleikamp * a directory, then a forward search is made for a block group with both 676ac27a0ecSDave Kleikamp * free space and a low directory-to-inode ratio; if that fails, then of 677ac27a0ecSDave Kleikamp * the groups with above-average free space, that group with the fewest 678ac27a0ecSDave Kleikamp * directories already is chosen. 679ac27a0ecSDave Kleikamp * 680ac27a0ecSDave Kleikamp * For other inodes, search forward from the parent directory's block 681ac27a0ecSDave Kleikamp * group to find a free inode. 682ac27a0ecSDave Kleikamp */ 683617ba13bSMingming Cao struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode) 684ac27a0ecSDave Kleikamp { 685ac27a0ecSDave Kleikamp struct super_block *sb; 6863300bedaSAneesh Kumar K.V struct buffer_head *inode_bitmap_bh = NULL; 6873300bedaSAneesh Kumar K.V struct buffer_head *group_desc_bh; 6882aa9fc4cSAvantika Mathur ext4_group_t group = 0; 689ac27a0ecSDave Kleikamp unsigned long ino = 0; 690ac27a0ecSDave Kleikamp struct inode *inode; 691617ba13bSMingming Cao struct ext4_group_desc *gdp = NULL; 692617ba13bSMingming Cao struct ext4_super_block *es; 693617ba13bSMingming Cao struct ext4_inode_info *ei; 694617ba13bSMingming Cao struct ext4_sb_info *sbi; 69539341867SAneesh Kumar K.V int ret2, err = 0; 696ac27a0ecSDave Kleikamp struct inode *ret; 6972aa9fc4cSAvantika Mathur ext4_group_t i; 6982aa9fc4cSAvantika Mathur int free = 0; 699772cb7c8SJose R. Santos ext4_group_t flex_group; 700ac27a0ecSDave Kleikamp 701ac27a0ecSDave Kleikamp /* Cannot create files in a deleted directory */ 702ac27a0ecSDave Kleikamp if (!dir || !dir->i_nlink) 703ac27a0ecSDave Kleikamp return ERR_PTR(-EPERM); 704ac27a0ecSDave Kleikamp 705ac27a0ecSDave Kleikamp sb = dir->i_sb; 706*ba80b101STheodore Ts'o trace_mark(ext4_request_inode, "dev %s dir %lu mode %d", sb->s_id, 707*ba80b101STheodore Ts'o dir->i_ino, mode); 708ac27a0ecSDave Kleikamp inode = new_inode(sb); 709ac27a0ecSDave Kleikamp if (!inode) 710ac27a0ecSDave Kleikamp return ERR_PTR(-ENOMEM); 711617ba13bSMingming Cao ei = EXT4_I(inode); 712ac27a0ecSDave Kleikamp 713617ba13bSMingming Cao sbi = EXT4_SB(sb); 714ac27a0ecSDave Kleikamp es = sbi->s_es; 715772cb7c8SJose R. Santos 716772cb7c8SJose R. Santos if (sbi->s_log_groups_per_flex) { 717772cb7c8SJose R. Santos ret2 = find_group_flex(sb, dir, &group); 718772cb7c8SJose R. Santos goto got_group; 719772cb7c8SJose R. Santos } 720772cb7c8SJose R. Santos 721ac27a0ecSDave Kleikamp if (S_ISDIR(mode)) { 722ac27a0ecSDave Kleikamp if (test_opt(sb, OLDALLOC)) 7232aa9fc4cSAvantika Mathur ret2 = find_group_dir(sb, dir, &group); 724ac27a0ecSDave Kleikamp else 7252aa9fc4cSAvantika Mathur ret2 = find_group_orlov(sb, dir, &group); 726ac27a0ecSDave Kleikamp } else 7272aa9fc4cSAvantika Mathur ret2 = find_group_other(sb, dir, &group); 728ac27a0ecSDave Kleikamp 729772cb7c8SJose R. Santos got_group: 730ac27a0ecSDave Kleikamp err = -ENOSPC; 7312aa9fc4cSAvantika Mathur if (ret2 == -1) 732ac27a0ecSDave Kleikamp goto out; 733ac27a0ecSDave Kleikamp 734ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_groups_count; i++) { 735ac27a0ecSDave Kleikamp err = -EIO; 736ac27a0ecSDave Kleikamp 7373300bedaSAneesh Kumar K.V gdp = ext4_get_group_desc(sb, group, &group_desc_bh); 738ac27a0ecSDave Kleikamp if (!gdp) 739ac27a0ecSDave Kleikamp goto fail; 740ac27a0ecSDave Kleikamp 7413300bedaSAneesh Kumar K.V brelse(inode_bitmap_bh); 7423300bedaSAneesh Kumar K.V inode_bitmap_bh = ext4_read_inode_bitmap(sb, group); 7433300bedaSAneesh Kumar K.V if (!inode_bitmap_bh) 744ac27a0ecSDave Kleikamp goto fail; 745ac27a0ecSDave Kleikamp 746ac27a0ecSDave Kleikamp ino = 0; 747ac27a0ecSDave Kleikamp 748ac27a0ecSDave Kleikamp repeat_in_this_group: 749617ba13bSMingming Cao ino = ext4_find_next_zero_bit((unsigned long *) 7503300bedaSAneesh Kumar K.V inode_bitmap_bh->b_data, 7513300bedaSAneesh Kumar K.V EXT4_INODES_PER_GROUP(sb), ino); 7523300bedaSAneesh Kumar K.V 753617ba13bSMingming Cao if (ino < EXT4_INODES_PER_GROUP(sb)) { 754ac27a0ecSDave Kleikamp 7553300bedaSAneesh Kumar K.V BUFFER_TRACE(inode_bitmap_bh, "get_write_access"); 7563300bedaSAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 7573300bedaSAneesh Kumar K.V inode_bitmap_bh); 758ac27a0ecSDave Kleikamp if (err) 759ac27a0ecSDave Kleikamp goto fail; 760ac27a0ecSDave Kleikamp 76139341867SAneesh Kumar K.V BUFFER_TRACE(group_desc_bh, "get_write_access"); 76239341867SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 76339341867SAneesh Kumar K.V group_desc_bh); 76439341867SAneesh Kumar K.V if (err) 76539341867SAneesh Kumar K.V goto fail; 76639341867SAneesh Kumar K.V if (!ext4_claim_inode(sb, inode_bitmap_bh, 76739341867SAneesh Kumar K.V ino, group, mode)) { 768ac27a0ecSDave Kleikamp /* we won it */ 7693300bedaSAneesh Kumar K.V BUFFER_TRACE(inode_bitmap_bh, 7700390131bSFrank Mayhar "call ext4_handle_dirty_metadata"); 7710390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, 7720390131bSFrank Mayhar inode, 7733300bedaSAneesh Kumar K.V inode_bitmap_bh); 774ac27a0ecSDave Kleikamp if (err) 775ac27a0ecSDave Kleikamp goto fail; 77639341867SAneesh Kumar K.V /* zero bit is inode number 1*/ 77739341867SAneesh Kumar K.V ino++; 778ac27a0ecSDave Kleikamp goto got; 779ac27a0ecSDave Kleikamp } 780ac27a0ecSDave Kleikamp /* we lost it */ 7813300bedaSAneesh Kumar K.V ext4_handle_release_buffer(handle, inode_bitmap_bh); 78239341867SAneesh Kumar K.V ext4_handle_release_buffer(handle, group_desc_bh); 783ac27a0ecSDave Kleikamp 784617ba13bSMingming Cao if (++ino < EXT4_INODES_PER_GROUP(sb)) 785ac27a0ecSDave Kleikamp goto repeat_in_this_group; 786ac27a0ecSDave Kleikamp } 787ac27a0ecSDave Kleikamp 788ac27a0ecSDave Kleikamp /* 789ac27a0ecSDave Kleikamp * This case is possible in concurrent environment. It is very 790ac27a0ecSDave Kleikamp * rare. We cannot repeat the find_group_xxx() call because 791ac27a0ecSDave Kleikamp * that will simply return the same blockgroup, because the 792ac27a0ecSDave Kleikamp * group descriptor metadata has not yet been updated. 793ac27a0ecSDave Kleikamp * So we just go onto the next blockgroup. 794ac27a0ecSDave Kleikamp */ 795ac27a0ecSDave Kleikamp if (++group == sbi->s_groups_count) 796ac27a0ecSDave Kleikamp group = 0; 797ac27a0ecSDave Kleikamp } 798ac27a0ecSDave Kleikamp err = -ENOSPC; 799ac27a0ecSDave Kleikamp goto out; 800ac27a0ecSDave Kleikamp 801ac27a0ecSDave Kleikamp got: 802717d50e4SAndreas Dilger /* We may have to initialize the block bitmap if it isn't already */ 803717d50e4SAndreas Dilger if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM) && 804717d50e4SAndreas Dilger gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { 8053300bedaSAneesh Kumar K.V struct buffer_head *block_bitmap_bh; 806717d50e4SAndreas Dilger 8073300bedaSAneesh Kumar K.V block_bitmap_bh = ext4_read_block_bitmap(sb, group); 8083300bedaSAneesh Kumar K.V BUFFER_TRACE(block_bitmap_bh, "get block bitmap access"); 8093300bedaSAneesh Kumar K.V err = ext4_journal_get_write_access(handle, block_bitmap_bh); 810717d50e4SAndreas Dilger if (err) { 8113300bedaSAneesh Kumar K.V brelse(block_bitmap_bh); 812717d50e4SAndreas Dilger goto fail; 813717d50e4SAndreas Dilger } 814717d50e4SAndreas Dilger 815717d50e4SAndreas Dilger free = 0; 816ac27a0ecSDave Kleikamp spin_lock(sb_bgl_lock(sbi, group)); 817717d50e4SAndreas Dilger /* recheck and clear flag under lock if we still need to */ 818717d50e4SAndreas Dilger if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { 819717d50e4SAndreas Dilger free = ext4_free_blocks_after_init(sb, group, gdp); 8203300bedaSAneesh Kumar K.V gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT); 821560671a0SAneesh Kumar K.V ext4_free_blks_set(sb, gdp, free); 82223712a9cSFrederic Bohe gdp->bg_checksum = ext4_group_desc_csum(sbi, group, 82323712a9cSFrederic Bohe gdp); 824717d50e4SAndreas Dilger } 825717d50e4SAndreas Dilger spin_unlock(sb_bgl_lock(sbi, group)); 826717d50e4SAndreas Dilger 827717d50e4SAndreas Dilger /* Don't need to dirty bitmap block if we didn't change it */ 828717d50e4SAndreas Dilger if (free) { 8293300bedaSAneesh Kumar K.V BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap"); 8300390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, 8313300bedaSAneesh Kumar K.V NULL, block_bitmap_bh); 832717d50e4SAndreas Dilger } 833717d50e4SAndreas Dilger 8343300bedaSAneesh Kumar K.V brelse(block_bitmap_bh); 835717d50e4SAndreas Dilger if (err) 836717d50e4SAndreas Dilger goto fail; 837717d50e4SAndreas Dilger } 8383300bedaSAneesh Kumar K.V BUFFER_TRACE(group_desc_bh, "call ext4_handle_dirty_metadata"); 8393300bedaSAneesh Kumar K.V err = ext4_handle_dirty_metadata(handle, NULL, group_desc_bh); 84039341867SAneesh Kumar K.V if (err) 84139341867SAneesh Kumar K.V goto fail; 842ac27a0ecSDave Kleikamp 843ac27a0ecSDave Kleikamp percpu_counter_dec(&sbi->s_freeinodes_counter); 844ac27a0ecSDave Kleikamp if (S_ISDIR(mode)) 845ac27a0ecSDave Kleikamp percpu_counter_inc(&sbi->s_dirs_counter); 846ac27a0ecSDave Kleikamp sb->s_dirt = 1; 847ac27a0ecSDave Kleikamp 848772cb7c8SJose R. Santos if (sbi->s_log_groups_per_flex) { 849772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, group); 850772cb7c8SJose R. Santos spin_lock(sb_bgl_lock(sbi, flex_group)); 851772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_inodes--; 852772cb7c8SJose R. Santos spin_unlock(sb_bgl_lock(sbi, flex_group)); 853772cb7c8SJose R. Santos } 854772cb7c8SJose R. Santos 8554c9c544eSDavid Howells inode->i_uid = current_fsuid(); 856ac27a0ecSDave Kleikamp if (test_opt(sb, GRPID)) 857ac27a0ecSDave Kleikamp inode->i_gid = dir->i_gid; 858ac27a0ecSDave Kleikamp else if (dir->i_mode & S_ISGID) { 859ac27a0ecSDave Kleikamp inode->i_gid = dir->i_gid; 860ac27a0ecSDave Kleikamp if (S_ISDIR(mode)) 861ac27a0ecSDave Kleikamp mode |= S_ISGID; 862ac27a0ecSDave Kleikamp } else 8634c9c544eSDavid Howells inode->i_gid = current_fsgid(); 864ac27a0ecSDave Kleikamp inode->i_mode = mode; 865ac27a0ecSDave Kleikamp 866717d50e4SAndreas Dilger inode->i_ino = ino + group * EXT4_INODES_PER_GROUP(sb); 867ac27a0ecSDave Kleikamp /* This is the optimal IO size (for stat), not the fs block size */ 868ac27a0ecSDave Kleikamp inode->i_blocks = 0; 869ef7f3835SKalpak Shah inode->i_mtime = inode->i_atime = inode->i_ctime = ei->i_crtime = 870ef7f3835SKalpak Shah ext4_current_time(inode); 871ac27a0ecSDave Kleikamp 872ac27a0ecSDave Kleikamp memset(ei->i_data, 0, sizeof(ei->i_data)); 873ac27a0ecSDave Kleikamp ei->i_dir_start_lookup = 0; 874ac27a0ecSDave Kleikamp ei->i_disksize = 0; 875ac27a0ecSDave Kleikamp 87642bf0383SAneesh Kumar K.V /* 87742bf0383SAneesh Kumar K.V * Don't inherit extent flag from directory. We set extent flag on 87842bf0383SAneesh Kumar K.V * newly created directory and file only if -o extent mount option is 87942bf0383SAneesh Kumar K.V * specified 88042bf0383SAneesh Kumar K.V */ 88142bf0383SAneesh Kumar K.V ei->i_flags = EXT4_I(dir)->i_flags & ~(EXT4_INDEX_FL|EXT4_EXTENTS_FL); 882ac27a0ecSDave Kleikamp if (S_ISLNK(mode)) 883617ba13bSMingming Cao ei->i_flags &= ~(EXT4_IMMUTABLE_FL|EXT4_APPEND_FL); 884ac27a0ecSDave Kleikamp /* dirsync only applies to directories */ 885ac27a0ecSDave Kleikamp if (!S_ISDIR(mode)) 886617ba13bSMingming Cao ei->i_flags &= ~EXT4_DIRSYNC_FL; 887ac27a0ecSDave Kleikamp ei->i_file_acl = 0; 888ac27a0ecSDave Kleikamp ei->i_dtime = 0; 889ac27a0ecSDave Kleikamp ei->i_block_group = group; 890ac27a0ecSDave Kleikamp 891617ba13bSMingming Cao ext4_set_inode_flags(inode); 892ac27a0ecSDave Kleikamp if (IS_DIRSYNC(inode)) 8930390131bSFrank Mayhar ext4_handle_sync(handle); 8946b38e842SAl Viro if (insert_inode_locked(inode) < 0) { 8956b38e842SAl Viro err = -EINVAL; 8966b38e842SAl Viro goto fail_drop; 8976b38e842SAl Viro } 898ac27a0ecSDave Kleikamp spin_lock(&sbi->s_next_gen_lock); 899ac27a0ecSDave Kleikamp inode->i_generation = sbi->s_next_generation++; 900ac27a0ecSDave Kleikamp spin_unlock(&sbi->s_next_gen_lock); 901ac27a0ecSDave Kleikamp 902617ba13bSMingming Cao ei->i_state = EXT4_STATE_NEW; 903ef7f3835SKalpak Shah 904ef7f3835SKalpak Shah ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize; 905ac27a0ecSDave Kleikamp 906ac27a0ecSDave Kleikamp ret = inode; 907ac27a0ecSDave Kleikamp if (DQUOT_ALLOC_INODE(inode)) { 908ac27a0ecSDave Kleikamp err = -EDQUOT; 909ac27a0ecSDave Kleikamp goto fail_drop; 910ac27a0ecSDave Kleikamp } 911ac27a0ecSDave Kleikamp 912617ba13bSMingming Cao err = ext4_init_acl(handle, inode, dir); 913ac27a0ecSDave Kleikamp if (err) 914ac27a0ecSDave Kleikamp goto fail_free_drop; 915ac27a0ecSDave Kleikamp 916617ba13bSMingming Cao err = ext4_init_security(handle, inode, dir); 917ac27a0ecSDave Kleikamp if (err) 918ac27a0ecSDave Kleikamp goto fail_free_drop; 919ac27a0ecSDave Kleikamp 920a86c6181SAlex Tomas if (test_opt(sb, EXTENTS)) { 921e4079a11SEric Sandeen /* set extent flag only for directory, file and normal symlink*/ 922e65187e6SAneesh Kumar K.V if (S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) { 923a86c6181SAlex Tomas EXT4_I(inode)->i_flags |= EXT4_EXTENTS_FL; 924a86c6181SAlex Tomas ext4_ext_tree_init(handle, inode); 925a86c6181SAlex Tomas } 92642bf0383SAneesh Kumar K.V } 927ac27a0ecSDave Kleikamp 9288753e88fSAneesh Kumar K.V err = ext4_mark_inode_dirty(handle, inode); 9298753e88fSAneesh Kumar K.V if (err) { 9308753e88fSAneesh Kumar K.V ext4_std_error(sb, err); 9318753e88fSAneesh Kumar K.V goto fail_free_drop; 9328753e88fSAneesh Kumar K.V } 9338753e88fSAneesh Kumar K.V 934617ba13bSMingming Cao ext4_debug("allocating inode %lu\n", inode->i_ino); 935*ba80b101STheodore Ts'o trace_mark(ext4_allocate_inode, "dev %s ino %lu dir %lu mode %d", 936*ba80b101STheodore Ts'o sb->s_id, inode->i_ino, dir->i_ino, mode); 937ac27a0ecSDave Kleikamp goto really_out; 938ac27a0ecSDave Kleikamp fail: 939617ba13bSMingming Cao ext4_std_error(sb, err); 940ac27a0ecSDave Kleikamp out: 941ac27a0ecSDave Kleikamp iput(inode); 942ac27a0ecSDave Kleikamp ret = ERR_PTR(err); 943ac27a0ecSDave Kleikamp really_out: 9443300bedaSAneesh Kumar K.V brelse(inode_bitmap_bh); 945ac27a0ecSDave Kleikamp return ret; 946ac27a0ecSDave Kleikamp 947ac27a0ecSDave Kleikamp fail_free_drop: 948ac27a0ecSDave Kleikamp DQUOT_FREE_INODE(inode); 949ac27a0ecSDave Kleikamp 950ac27a0ecSDave Kleikamp fail_drop: 951ac27a0ecSDave Kleikamp DQUOT_DROP(inode); 952ac27a0ecSDave Kleikamp inode->i_flags |= S_NOQUOTA; 953ac27a0ecSDave Kleikamp inode->i_nlink = 0; 9546b38e842SAl Viro unlock_new_inode(inode); 955ac27a0ecSDave Kleikamp iput(inode); 9563300bedaSAneesh Kumar K.V brelse(inode_bitmap_bh); 957ac27a0ecSDave Kleikamp return ERR_PTR(err); 958ac27a0ecSDave Kleikamp } 959ac27a0ecSDave Kleikamp 960ac27a0ecSDave Kleikamp /* Verify that we are loading a valid orphan from disk */ 961617ba13bSMingming Cao struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino) 962ac27a0ecSDave Kleikamp { 963617ba13bSMingming Cao unsigned long max_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count); 964fd2d4291SAvantika Mathur ext4_group_t block_group; 965ac27a0ecSDave Kleikamp int bit; 9661d1fe1eeSDavid Howells struct buffer_head *bitmap_bh; 967ac27a0ecSDave Kleikamp struct inode *inode = NULL; 9681d1fe1eeSDavid Howells long err = -EIO; 969ac27a0ecSDave Kleikamp 970ac27a0ecSDave Kleikamp /* Error cases - e2fsck has already cleaned up for us */ 971ac27a0ecSDave Kleikamp if (ino > max_ino) { 97246e665e9SHarvey Harrison ext4_warning(sb, __func__, 973ac27a0ecSDave Kleikamp "bad orphan ino %lu! e2fsck was run?", ino); 9741d1fe1eeSDavid Howells goto error; 975ac27a0ecSDave Kleikamp } 976ac27a0ecSDave Kleikamp 977617ba13bSMingming Cao block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); 978617ba13bSMingming Cao bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); 979e29d1cdeSEric Sandeen bitmap_bh = ext4_read_inode_bitmap(sb, block_group); 980ac27a0ecSDave Kleikamp if (!bitmap_bh) { 98146e665e9SHarvey Harrison ext4_warning(sb, __func__, 982ac27a0ecSDave Kleikamp "inode bitmap error for orphan %lu", ino); 9831d1fe1eeSDavid Howells goto error; 984ac27a0ecSDave Kleikamp } 985ac27a0ecSDave Kleikamp 986ac27a0ecSDave Kleikamp /* Having the inode bit set should be a 100% indicator that this 987ac27a0ecSDave Kleikamp * is a valid orphan (no e2fsck run on fs). Orphans also include 988ac27a0ecSDave Kleikamp * inodes that were being truncated, so we can't check i_nlink==0. 989ac27a0ecSDave Kleikamp */ 9901d1fe1eeSDavid Howells if (!ext4_test_bit(bit, bitmap_bh->b_data)) 9911d1fe1eeSDavid Howells goto bad_orphan; 9921d1fe1eeSDavid Howells 9931d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 9941d1fe1eeSDavid Howells if (IS_ERR(inode)) 9951d1fe1eeSDavid Howells goto iget_failed; 9961d1fe1eeSDavid Howells 99791ef4cafSDuane Griffin /* 99891ef4cafSDuane Griffin * If the orphans has i_nlinks > 0 then it should be able to be 99991ef4cafSDuane Griffin * truncated, otherwise it won't be removed from the orphan list 100091ef4cafSDuane Griffin * during processing and an infinite loop will result. 100191ef4cafSDuane Griffin */ 100291ef4cafSDuane Griffin if (inode->i_nlink && !ext4_can_truncate(inode)) 100391ef4cafSDuane Griffin goto bad_orphan; 100491ef4cafSDuane Griffin 10051d1fe1eeSDavid Howells if (NEXT_ORPHAN(inode) > max_ino) 10061d1fe1eeSDavid Howells goto bad_orphan; 10071d1fe1eeSDavid Howells brelse(bitmap_bh); 10081d1fe1eeSDavid Howells return inode; 10091d1fe1eeSDavid Howells 10101d1fe1eeSDavid Howells iget_failed: 10111d1fe1eeSDavid Howells err = PTR_ERR(inode); 10121d1fe1eeSDavid Howells inode = NULL; 10131d1fe1eeSDavid Howells bad_orphan: 101446e665e9SHarvey Harrison ext4_warning(sb, __func__, 1015ac27a0ecSDave Kleikamp "bad orphan inode %lu! e2fsck was run?", ino); 1016617ba13bSMingming Cao printk(KERN_NOTICE "ext4_test_bit(bit=%d, block=%llu) = %d\n", 1017ac27a0ecSDave Kleikamp bit, (unsigned long long)bitmap_bh->b_blocknr, 1018617ba13bSMingming Cao ext4_test_bit(bit, bitmap_bh->b_data)); 1019ac27a0ecSDave Kleikamp printk(KERN_NOTICE "inode=%p\n", inode); 1020ac27a0ecSDave Kleikamp if (inode) { 1021ac27a0ecSDave Kleikamp printk(KERN_NOTICE "is_bad_inode(inode)=%d\n", 1022ac27a0ecSDave Kleikamp is_bad_inode(inode)); 1023ac27a0ecSDave Kleikamp printk(KERN_NOTICE "NEXT_ORPHAN(inode)=%u\n", 1024ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1025ac27a0ecSDave Kleikamp printk(KERN_NOTICE "max_ino=%lu\n", max_ino); 102691ef4cafSDuane Griffin printk(KERN_NOTICE "i_nlink=%u\n", inode->i_nlink); 1027ac27a0ecSDave Kleikamp /* Avoid freeing blocks if we got a bad deleted inode */ 10281d1fe1eeSDavid Howells if (inode->i_nlink == 0) 1029ac27a0ecSDave Kleikamp inode->i_blocks = 0; 1030ac27a0ecSDave Kleikamp iput(inode); 1031ac27a0ecSDave Kleikamp } 1032ac27a0ecSDave Kleikamp brelse(bitmap_bh); 10331d1fe1eeSDavid Howells error: 10341d1fe1eeSDavid Howells return ERR_PTR(err); 1035ac27a0ecSDave Kleikamp } 1036ac27a0ecSDave Kleikamp 1037617ba13bSMingming Cao unsigned long ext4_count_free_inodes(struct super_block *sb) 1038ac27a0ecSDave Kleikamp { 1039ac27a0ecSDave Kleikamp unsigned long desc_count; 1040617ba13bSMingming Cao struct ext4_group_desc *gdp; 1041fd2d4291SAvantika Mathur ext4_group_t i; 1042617ba13bSMingming Cao #ifdef EXT4FS_DEBUG 1043617ba13bSMingming Cao struct ext4_super_block *es; 1044ac27a0ecSDave Kleikamp unsigned long bitmap_count, x; 1045ac27a0ecSDave Kleikamp struct buffer_head *bitmap_bh = NULL; 1046ac27a0ecSDave Kleikamp 1047617ba13bSMingming Cao es = EXT4_SB(sb)->s_es; 1048ac27a0ecSDave Kleikamp desc_count = 0; 1049ac27a0ecSDave Kleikamp bitmap_count = 0; 1050ac27a0ecSDave Kleikamp gdp = NULL; 1051617ba13bSMingming Cao for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) { 1052617ba13bSMingming Cao gdp = ext4_get_group_desc(sb, i, NULL); 1053ac27a0ecSDave Kleikamp if (!gdp) 1054ac27a0ecSDave Kleikamp continue; 1055560671a0SAneesh Kumar K.V desc_count += ext4_free_inodes_count(sb, gdp); 1056ac27a0ecSDave Kleikamp brelse(bitmap_bh); 1057e29d1cdeSEric Sandeen bitmap_bh = ext4_read_inode_bitmap(sb, i); 1058ac27a0ecSDave Kleikamp if (!bitmap_bh) 1059ac27a0ecSDave Kleikamp continue; 1060ac27a0ecSDave Kleikamp 1061617ba13bSMingming Cao x = ext4_count_free(bitmap_bh, EXT4_INODES_PER_GROUP(sb) / 8); 1062c549a95dSEric Sandeen printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n", 1063560671a0SAneesh Kumar K.V i, ext4_free_inodes_count(sb, gdp), x); 1064ac27a0ecSDave Kleikamp bitmap_count += x; 1065ac27a0ecSDave Kleikamp } 1066ac27a0ecSDave Kleikamp brelse(bitmap_bh); 10674776004fSTheodore Ts'o printk(KERN_DEBUG "ext4_count_free_inodes: " 10684776004fSTheodore Ts'o "stored = %u, computed = %lu, %lu\n", 1069ac27a0ecSDave Kleikamp le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count); 1070ac27a0ecSDave Kleikamp return desc_count; 1071ac27a0ecSDave Kleikamp #else 1072ac27a0ecSDave Kleikamp desc_count = 0; 1073617ba13bSMingming Cao for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) { 1074617ba13bSMingming Cao gdp = ext4_get_group_desc(sb, i, NULL); 1075ac27a0ecSDave Kleikamp if (!gdp) 1076ac27a0ecSDave Kleikamp continue; 1077560671a0SAneesh Kumar K.V desc_count += ext4_free_inodes_count(sb, gdp); 1078ac27a0ecSDave Kleikamp cond_resched(); 1079ac27a0ecSDave Kleikamp } 1080ac27a0ecSDave Kleikamp return desc_count; 1081ac27a0ecSDave Kleikamp #endif 1082ac27a0ecSDave Kleikamp } 1083ac27a0ecSDave Kleikamp 1084ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1085617ba13bSMingming Cao unsigned long ext4_count_dirs(struct super_block * sb) 1086ac27a0ecSDave Kleikamp { 1087ac27a0ecSDave Kleikamp unsigned long count = 0; 1088fd2d4291SAvantika Mathur ext4_group_t i; 1089ac27a0ecSDave Kleikamp 1090617ba13bSMingming Cao for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) { 1091617ba13bSMingming Cao struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1092ac27a0ecSDave Kleikamp if (!gdp) 1093ac27a0ecSDave Kleikamp continue; 1094560671a0SAneesh Kumar K.V count += ext4_used_dirs_count(sb, gdp); 1095ac27a0ecSDave Kleikamp } 1096ac27a0ecSDave Kleikamp return count; 1097ac27a0ecSDave Kleikamp } 1098