1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427abc52c2SDan Magenheimer #include <linux/cleancache.h> 437c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 44ee73f9a5SJeff Layton #include <linux/iversion.h> 45ac27a0ecSDave Kleikamp 46bfff6873SLukas Czerner #include <linux/kthread.h> 47bfff6873SLukas Czerner #include <linux/freezer.h> 48bfff6873SLukas Czerner 493dcf5451SChristoph Hellwig #include "ext4.h" 504a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 513dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 52ac27a0ecSDave Kleikamp #include "xattr.h" 53ac27a0ecSDave Kleikamp #include "acl.h" 543661d286STheodore Ts'o #include "mballoc.h" 550c9ec4beSDarrick J. Wong #include "fsmap.h" 56ac27a0ecSDave Kleikamp 579bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 589bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 599bffad1eSTheodore Ts'o 600b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 610b75a840SLukas Czerner static struct mutex ext4_li_mtx; 62e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 639f6200bbSTheodore Ts'o 64617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 65ac27a0ecSDave Kleikamp unsigned long journal_devnum); 662adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 67e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 68617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 69617ba13bSMingming Cao struct ext4_super_block *es); 70617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 71617ba13bSMingming Cao struct ext4_super_block *es); 72617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 73617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 74617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 75c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 76c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 77152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 78152a0836SAl Viro const char *dev_name, void *data); 792035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 81d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 85c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 86c6cb7e77SEric Whitney unsigned int journal_inum); 87ac27a0ecSDave Kleikamp 88e74031fdSJan Kara /* 89e74031fdSJan Kara * Lock ordering 90e74031fdSJan Kara * 91e74031fdSJan Kara * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and 92e74031fdSJan Kara * i_mmap_rwsem (inode->i_mmap_rwsem)! 93e74031fdSJan Kara * 94e74031fdSJan Kara * page fault path: 95e74031fdSJan Kara * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> 96e74031fdSJan Kara * page lock -> i_data_sem (rw) 97e74031fdSJan Kara * 98e74031fdSJan Kara * buffered write path: 99e74031fdSJan Kara * sb_start_write -> i_mutex -> mmap_sem 100e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 101e74031fdSJan Kara * i_data_sem (rw) 102e74031fdSJan Kara * 103e74031fdSJan Kara * truncate: 1041d39834fSNikolay Borisov * sb_start_write -> i_mutex -> i_mmap_sem (w) -> i_mmap_rwsem (w) -> page lock 1051d39834fSNikolay Borisov * sb_start_write -> i_mutex -> i_mmap_sem (w) -> transaction start -> 1061d39834fSNikolay Borisov * i_data_sem (rw) 107e74031fdSJan Kara * 108e74031fdSJan Kara * direct IO: 1091d39834fSNikolay Borisov * sb_start_write -> i_mutex -> mmap_sem 1101d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 111e74031fdSJan Kara * 112e74031fdSJan Kara * writepages: 113e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 114e74031fdSJan Kara */ 115e74031fdSJan Kara 116c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1172035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1182035e776STheodore Ts'o .owner = THIS_MODULE, 1192035e776STheodore Ts'o .name = "ext2", 1202035e776STheodore Ts'o .mount = ext4_mount, 1212035e776STheodore Ts'o .kill_sb = kill_block_super, 1222035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1232035e776STheodore Ts'o }; 1247f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 125fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1262035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1272035e776STheodore Ts'o #else 1282035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1292035e776STheodore Ts'o #endif 1302035e776STheodore Ts'o 1312035e776STheodore Ts'o 132ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 133ba69f9abSJan Kara .owner = THIS_MODULE, 134ba69f9abSJan Kara .name = "ext3", 135152a0836SAl Viro .mount = ext4_mount, 136ba69f9abSJan Kara .kill_sb = kill_block_super, 137ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 138ba69f9abSJan Kara }; 1397f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 140fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 141ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 142bd81d8eeSLaurent Vivier 143d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 144d25425f8SDarrick J. Wong struct ext4_super_block *es) 145d25425f8SDarrick J. Wong { 146e2b911c5SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 147d25425f8SDarrick J. Wong return 1; 148d25425f8SDarrick J. Wong 149d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 150d25425f8SDarrick J. Wong } 151d25425f8SDarrick J. Wong 152a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 153a9c47317SDarrick J. Wong struct ext4_super_block *es) 154a9c47317SDarrick J. Wong { 155a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 156a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 157a9c47317SDarrick J. Wong __u32 csum; 158a9c47317SDarrick J. Wong 159a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 160a9c47317SDarrick J. Wong 161a9c47317SDarrick J. Wong return cpu_to_le32(csum); 162a9c47317SDarrick J. Wong } 163a9c47317SDarrick J. Wong 164c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 165a9c47317SDarrick J. Wong struct ext4_super_block *es) 166a9c47317SDarrick J. Wong { 1679aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 168a9c47317SDarrick J. Wong return 1; 169a9c47317SDarrick J. Wong 170a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 171a9c47317SDarrick J. Wong } 172a9c47317SDarrick J. Wong 17306db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 174a9c47317SDarrick J. Wong { 17506db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 17606db49e6STheodore Ts'o 1779aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 178a9c47317SDarrick J. Wong return; 179a9c47317SDarrick J. Wong 180a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 181a9c47317SDarrick J. Wong } 182a9c47317SDarrick J. Wong 1839933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1849933fc0aSTheodore Ts'o { 1859933fc0aSTheodore Ts'o void *ret; 1869933fc0aSTheodore Ts'o 1878be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1889933fc0aSTheodore Ts'o if (!ret) 1899933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1909933fc0aSTheodore Ts'o return ret; 1919933fc0aSTheodore Ts'o } 1929933fc0aSTheodore Ts'o 1939933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1949933fc0aSTheodore Ts'o { 1959933fc0aSTheodore Ts'o void *ret; 1969933fc0aSTheodore Ts'o 1978be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1989933fc0aSTheodore Ts'o if (!ret) 1999933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 2009933fc0aSTheodore Ts'o return ret; 2019933fc0aSTheodore Ts'o } 2029933fc0aSTheodore Ts'o 2038fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 2048fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 205bd81d8eeSLaurent Vivier { 2063a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 2078fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2088fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 209bd81d8eeSLaurent Vivier } 210bd81d8eeSLaurent Vivier 2118fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 2128fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 213bd81d8eeSLaurent Vivier { 2145272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2158fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2168fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 217bd81d8eeSLaurent Vivier } 218bd81d8eeSLaurent Vivier 2198fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2208fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 221bd81d8eeSLaurent Vivier { 2225272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2238fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2248fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 225bd81d8eeSLaurent Vivier } 226bd81d8eeSLaurent Vivier 227021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 228560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 229560671a0SAneesh Kumar K.V { 230560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 231560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 232560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 233560671a0SAneesh Kumar K.V } 234560671a0SAneesh Kumar K.V 235560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 236560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 237560671a0SAneesh Kumar K.V { 238560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 239560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 240560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 241560671a0SAneesh Kumar K.V } 242560671a0SAneesh Kumar K.V 243560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 244560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 245560671a0SAneesh Kumar K.V { 246560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 247560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 248560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 249560671a0SAneesh Kumar K.V } 250560671a0SAneesh Kumar K.V 251560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 252560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 253560671a0SAneesh Kumar K.V { 254560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 255560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 256560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 257560671a0SAneesh Kumar K.V } 258560671a0SAneesh Kumar K.V 2598fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2608fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 261bd81d8eeSLaurent Vivier { 2623a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2638fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2648fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 265bd81d8eeSLaurent Vivier } 266bd81d8eeSLaurent Vivier 2678fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2688fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 269bd81d8eeSLaurent Vivier { 2705272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2718fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2728fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 273bd81d8eeSLaurent Vivier } 274bd81d8eeSLaurent Vivier 2758fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2768fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 277bd81d8eeSLaurent Vivier { 2785272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2798fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2808fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 281bd81d8eeSLaurent Vivier } 282bd81d8eeSLaurent Vivier 283021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 284560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 285560671a0SAneesh Kumar K.V { 286560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 287560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 288560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 289560671a0SAneesh Kumar K.V } 290560671a0SAneesh Kumar K.V 291560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 292560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 293560671a0SAneesh Kumar K.V { 294560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 295560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 296560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 297560671a0SAneesh Kumar K.V } 298560671a0SAneesh Kumar K.V 299560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 300560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 301560671a0SAneesh Kumar K.V { 302560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 303560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 304560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 305560671a0SAneesh Kumar K.V } 306560671a0SAneesh Kumar K.V 307560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 308560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 309560671a0SAneesh Kumar K.V { 310560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 311560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 312560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 313560671a0SAneesh Kumar K.V } 314560671a0SAneesh Kumar K.V 315d3d1faf6SCurt Wohlgemuth 3161c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3171c13d5c0STheodore Ts'o unsigned int line) 3181c13d5c0STheodore Ts'o { 3191c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3201c13d5c0STheodore Ts'o 3211c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3221b46617bSTheodore Ts'o if (bdev_read_only(sb->s_bdev)) 3231b46617bSTheodore Ts'o return; 3241c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3251c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3261c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3271c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3281c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3291c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3301c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3311c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3321c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3331c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3341c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3351c13d5c0STheodore Ts'o } 33666e61a9eSTheodore Ts'o /* 33766e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 33866e61a9eSTheodore Ts'o * started already 33966e61a9eSTheodore Ts'o */ 34066e61a9eSTheodore Ts'o if (!es->s_error_count) 34166e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 342ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3431c13d5c0STheodore Ts'o } 3441c13d5c0STheodore Ts'o 3451c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3461c13d5c0STheodore Ts'o unsigned int line) 3471c13d5c0STheodore Ts'o { 3481c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3491c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3501c13d5c0STheodore Ts'o } 3511c13d5c0STheodore Ts'o 352bdfe0cbdSTheodore Ts'o /* 353bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 354bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 355bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 356bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 357bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 358bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 359bdfe0cbdSTheodore Ts'o */ 360bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 361bdfe0cbdSTheodore Ts'o { 362bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 363bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 364bdfe0cbdSTheodore Ts'o 365bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 366bdfe0cbdSTheodore Ts'o } 367bdfe0cbdSTheodore Ts'o 36818aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 36918aadd47SBobi Jam { 37018aadd47SBobi Jam struct super_block *sb = journal->j_private; 37118aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 37218aadd47SBobi Jam int error = is_journal_aborted(journal); 3735d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 37418aadd47SBobi Jam 3755d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 376a0154344SDaeho Jeong 377a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 378a0154344SDaeho Jeong 37918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3805d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3815d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3825d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 38318aadd47SBobi Jam list_del_init(&jce->jce_list); 38418aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 38518aadd47SBobi Jam jce->jce_func(sb, jce, error); 38618aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 38718aadd47SBobi Jam } 38818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 38918aadd47SBobi Jam } 3901c13d5c0STheodore Ts'o 391ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 392ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 393ac27a0ecSDave Kleikamp * 394ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 395617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 396ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 397ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 398ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 399ac27a0ecSDave Kleikamp * write out the superblock safely. 400ac27a0ecSDave Kleikamp * 401dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 402d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 403ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 404ac27a0ecSDave Kleikamp */ 405ac27a0ecSDave Kleikamp 406617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 407ac27a0ecSDave Kleikamp { 408bc98a42cSDavid Howells if (sb_rdonly(sb)) 409ac27a0ecSDave Kleikamp return; 410ac27a0ecSDave Kleikamp 411ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 412617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 413ac27a0ecSDave Kleikamp 4144ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 415ac27a0ecSDave Kleikamp if (journal) 416dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 417ac27a0ecSDave Kleikamp } 418ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 419b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4204418e141SDmitry Monakhov /* 4214418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4224418e141SDmitry Monakhov * before ->s_flags update 4234418e141SDmitry Monakhov */ 4244418e141SDmitry Monakhov smp_wmb(); 4251751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 426ac27a0ecSDave Kleikamp } 4274327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 4284327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 4294327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 4304327ba52SDaeho Jeong return; 431617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 432ac27a0ecSDave Kleikamp sb->s_id); 433ac27a0ecSDave Kleikamp } 4344327ba52SDaeho Jeong } 435ac27a0ecSDave Kleikamp 436efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 437efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 438efbed4dcSTheodore Ts'o "EXT4-fs error") 439efbed4dcSTheodore Ts'o 44012062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 441c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 442ac27a0ecSDave Kleikamp { 4430ff2ea7dSJoe Perches struct va_format vaf; 444ac27a0ecSDave Kleikamp va_list args; 445ac27a0ecSDave Kleikamp 4460db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 4470db1ff22STheodore Ts'o return; 4480db1ff22STheodore Ts'o 449ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 450efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 451ac27a0ecSDave Kleikamp va_start(args, fmt); 4520ff2ea7dSJoe Perches vaf.fmt = fmt; 4530ff2ea7dSJoe Perches vaf.va = &args; 454efbed4dcSTheodore Ts'o printk(KERN_CRIT 455efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4560ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 457ac27a0ecSDave Kleikamp va_end(args); 458efbed4dcSTheodore Ts'o } 459f3fc0210STheodore Ts'o save_error_info(sb, function, line); 460617ba13bSMingming Cao ext4_handle_error(sb); 461ac27a0ecSDave Kleikamp } 462ac27a0ecSDave Kleikamp 463e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 464c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 465273df556SFrank Mayhar const char *fmt, ...) 466273df556SFrank Mayhar { 467273df556SFrank Mayhar va_list args; 468f7c21177STheodore Ts'o struct va_format vaf; 4691c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 470273df556SFrank Mayhar 4710db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 4720db1ff22STheodore Ts'o return; 4730db1ff22STheodore Ts'o 474ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 4751c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4761c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 477efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 478273df556SFrank Mayhar va_start(args, fmt); 479f7c21177STheodore Ts'o vaf.fmt = fmt; 480f7c21177STheodore Ts'o vaf.va = &args; 481c398eda0STheodore Ts'o if (block) 482d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 483d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 484d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 485d9ee81daSJoe Perches block, current->comm, &vaf); 486d9ee81daSJoe Perches else 487d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 488d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 489d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 490d9ee81daSJoe Perches current->comm, &vaf); 491273df556SFrank Mayhar va_end(args); 492efbed4dcSTheodore Ts'o } 493efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 494273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 495273df556SFrank Mayhar } 496273df556SFrank Mayhar 497e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 498f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 499f7c21177STheodore Ts'o const char *fmt, ...) 500273df556SFrank Mayhar { 501273df556SFrank Mayhar va_list args; 502f7c21177STheodore Ts'o struct va_format vaf; 5031c13d5c0STheodore Ts'o struct ext4_super_block *es; 504496ad9aaSAl Viro struct inode *inode = file_inode(file); 505273df556SFrank Mayhar char pathname[80], *path; 506273df556SFrank Mayhar 5070db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 5080db1ff22STheodore Ts'o return; 5090db1ff22STheodore Ts'o 510ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 5111c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5121c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 513efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 5149bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 515f9a62d09SDan Carpenter if (IS_ERR(path)) 516273df556SFrank Mayhar path = "(unknown)"; 517f7c21177STheodore Ts'o va_start(args, fmt); 518f7c21177STheodore Ts'o vaf.fmt = fmt; 519f7c21177STheodore Ts'o vaf.va = &args; 520d9ee81daSJoe Perches if (block) 521d9ee81daSJoe Perches printk(KERN_CRIT 522d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 523d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 524d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 525d9ee81daSJoe Perches block, current->comm, path, &vaf); 526d9ee81daSJoe Perches else 527d9ee81daSJoe Perches printk(KERN_CRIT 528d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 529d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 530d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 531d9ee81daSJoe Perches current->comm, path, &vaf); 532273df556SFrank Mayhar va_end(args); 533efbed4dcSTheodore Ts'o } 534efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 535273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 536273df556SFrank Mayhar } 537273df556SFrank Mayhar 538722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 539ac27a0ecSDave Kleikamp char nbuf[16]) 540ac27a0ecSDave Kleikamp { 541ac27a0ecSDave Kleikamp char *errstr = NULL; 542ac27a0ecSDave Kleikamp 543ac27a0ecSDave Kleikamp switch (errno) { 5446a797d27SDarrick J. Wong case -EFSCORRUPTED: 5456a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 5466a797d27SDarrick J. Wong break; 5476a797d27SDarrick J. Wong case -EFSBADCRC: 5486a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 5496a797d27SDarrick J. Wong break; 550ac27a0ecSDave Kleikamp case -EIO: 551ac27a0ecSDave Kleikamp errstr = "IO failure"; 552ac27a0ecSDave Kleikamp break; 553ac27a0ecSDave Kleikamp case -ENOMEM: 554ac27a0ecSDave Kleikamp errstr = "Out of memory"; 555ac27a0ecSDave Kleikamp break; 556ac27a0ecSDave Kleikamp case -EROFS: 55778f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 55878f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 559ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 560ac27a0ecSDave Kleikamp else 561ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 562ac27a0ecSDave Kleikamp break; 563ac27a0ecSDave Kleikamp default: 564ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 565ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 566ac27a0ecSDave Kleikamp * NULL. */ 567ac27a0ecSDave Kleikamp if (nbuf) { 568ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 569ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 570ac27a0ecSDave Kleikamp errstr = nbuf; 571ac27a0ecSDave Kleikamp } 572ac27a0ecSDave Kleikamp break; 573ac27a0ecSDave Kleikamp } 574ac27a0ecSDave Kleikamp 575ac27a0ecSDave Kleikamp return errstr; 576ac27a0ecSDave Kleikamp } 577ac27a0ecSDave Kleikamp 578617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 579ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 580ac27a0ecSDave Kleikamp 581c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 582c398eda0STheodore Ts'o unsigned int line, int errno) 583ac27a0ecSDave Kleikamp { 584ac27a0ecSDave Kleikamp char nbuf[16]; 585ac27a0ecSDave Kleikamp const char *errstr; 586ac27a0ecSDave Kleikamp 5870db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 5880db1ff22STheodore Ts'o return; 5890db1ff22STheodore Ts'o 590ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 591ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 592ac27a0ecSDave Kleikamp * an error. */ 593bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 594ac27a0ecSDave Kleikamp return; 595ac27a0ecSDave Kleikamp 596efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 597617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 598c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 599c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 600efbed4dcSTheodore Ts'o } 601ac27a0ecSDave Kleikamp 602efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 603617ba13bSMingming Cao ext4_handle_error(sb); 604ac27a0ecSDave Kleikamp } 605ac27a0ecSDave Kleikamp 606ac27a0ecSDave Kleikamp /* 607617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 608ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 609ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 610ac27a0ecSDave Kleikamp * 611ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 612ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 613ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 614ac27a0ecSDave Kleikamp */ 615ac27a0ecSDave Kleikamp 616c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 617c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 618ac27a0ecSDave Kleikamp { 619651e1c3bSJoe Perches struct va_format vaf; 620ac27a0ecSDave Kleikamp va_list args; 621ac27a0ecSDave Kleikamp 6220db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 6230db1ff22STheodore Ts'o return; 6240db1ff22STheodore Ts'o 6251c13d5c0STheodore Ts'o save_error_info(sb, function, line); 626ac27a0ecSDave Kleikamp va_start(args, fmt); 627651e1c3bSJoe Perches vaf.fmt = fmt; 628651e1c3bSJoe Perches vaf.va = &args; 629651e1c3bSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: %pV\n", 630651e1c3bSJoe Perches sb->s_id, function, line, &vaf); 631ac27a0ecSDave Kleikamp va_end(args); 632ac27a0ecSDave Kleikamp 633bc98a42cSDavid Howells if (sb_rdonly(sb) == 0) { 634b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 6354ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 6364418e141SDmitry Monakhov /* 6374418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 6384418e141SDmitry Monakhov * before ->s_flags update 6394418e141SDmitry Monakhov */ 6404418e141SDmitry Monakhov smp_wmb(); 6411751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 642ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 643dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6441c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6451c13d5c0STheodore Ts'o } 6464327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 6474327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 6484327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 6494327ba52SDaeho Jeong return; 6501c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 651ac27a0ecSDave Kleikamp } 6524327ba52SDaeho Jeong } 653ac27a0ecSDave Kleikamp 654e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 655e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 656b31e1552SEric Sandeen { 6570ff2ea7dSJoe Perches struct va_format vaf; 658b31e1552SEric Sandeen va_list args; 659b31e1552SEric Sandeen 660efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 661efbed4dcSTheodore Ts'o return; 662efbed4dcSTheodore Ts'o 663b31e1552SEric Sandeen va_start(args, fmt); 6640ff2ea7dSJoe Perches vaf.fmt = fmt; 6650ff2ea7dSJoe Perches vaf.va = &args; 6660ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 667b31e1552SEric Sandeen va_end(args); 668b31e1552SEric Sandeen } 669b31e1552SEric Sandeen 670b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 671b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 672b03a2f7eSAndreas Dilger "EXT4-fs warning") 673b03a2f7eSAndreas Dilger 67412062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 675c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 676ac27a0ecSDave Kleikamp { 6770ff2ea7dSJoe Perches struct va_format vaf; 678ac27a0ecSDave Kleikamp va_list args; 679ac27a0ecSDave Kleikamp 680b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 681efbed4dcSTheodore Ts'o return; 682efbed4dcSTheodore Ts'o 683ac27a0ecSDave Kleikamp va_start(args, fmt); 6840ff2ea7dSJoe Perches vaf.fmt = fmt; 6850ff2ea7dSJoe Perches vaf.va = &args; 6860ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6870ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 688ac27a0ecSDave Kleikamp va_end(args); 689ac27a0ecSDave Kleikamp } 690ac27a0ecSDave Kleikamp 691b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 692b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 693b03a2f7eSAndreas Dilger { 694b03a2f7eSAndreas Dilger struct va_format vaf; 695b03a2f7eSAndreas Dilger va_list args; 696b03a2f7eSAndreas Dilger 697b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 698b03a2f7eSAndreas Dilger return; 699b03a2f7eSAndreas Dilger 700b03a2f7eSAndreas Dilger va_start(args, fmt); 701b03a2f7eSAndreas Dilger vaf.fmt = fmt; 702b03a2f7eSAndreas Dilger vaf.va = &args; 703b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 704b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 705b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 706b03a2f7eSAndreas Dilger va_end(args); 707b03a2f7eSAndreas Dilger } 708b03a2f7eSAndreas Dilger 709e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 710e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 711e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 712e29136f8STheodore Ts'o const char *fmt, ...) 7135d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7145d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7155d1b1b3fSAneesh Kumar K.V { 7160ff2ea7dSJoe Perches struct va_format vaf; 7175d1b1b3fSAneesh Kumar K.V va_list args; 7185d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7195d1b1b3fSAneesh Kumar K.V 7200db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7210db1ff22STheodore Ts'o return; 7220db1ff22STheodore Ts'o 723ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 7241c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7251c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7261c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7270ff2ea7dSJoe Perches 728efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 7295d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7300ff2ea7dSJoe Perches vaf.fmt = fmt; 7310ff2ea7dSJoe Perches vaf.va = &args; 73221149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 733e29136f8STheodore Ts'o sb->s_id, function, line, grp); 734e29136f8STheodore Ts'o if (ino) 7350ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 736e29136f8STheodore Ts'o if (block) 737efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 738efbed4dcSTheodore Ts'o (unsigned long long) block); 7390ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7405d1b1b3fSAneesh Kumar K.V va_end(args); 741efbed4dcSTheodore Ts'o } 7425d1b1b3fSAneesh Kumar K.V 7435d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 744e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7455d1b1b3fSAneesh Kumar K.V return; 7465d1b1b3fSAneesh Kumar K.V } 7471c13d5c0STheodore Ts'o 7485d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 74906f29cc8SZhouyi Zhou ext4_commit_super(sb, 1); 7505d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7515d1b1b3fSAneesh Kumar K.V /* 7525d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7535d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7545d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7555d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7565d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 75725985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7585d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7595d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7605d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7615d1b1b3fSAneesh Kumar K.V */ 7625d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7635d1b1b3fSAneesh Kumar K.V return; 7645d1b1b3fSAneesh Kumar K.V } 7655d1b1b3fSAneesh Kumar K.V 766db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 767db79e6d1SWang Shilong ext4_group_t group, 768db79e6d1SWang Shilong unsigned int flags) 769db79e6d1SWang Shilong { 770db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 771db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 772db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 773db79e6d1SWang Shilong 774db79e6d1SWang Shilong if ((flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) && 775db79e6d1SWang Shilong !EXT4_MB_GRP_BBITMAP_CORRUPT(grp)) { 776db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 777db79e6d1SWang Shilong grp->bb_free); 778db79e6d1SWang Shilong set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 779db79e6d1SWang Shilong &grp->bb_state); 780db79e6d1SWang Shilong } 781db79e6d1SWang Shilong 782db79e6d1SWang Shilong if ((flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) && 783db79e6d1SWang Shilong !EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { 784db79e6d1SWang Shilong if (gdp) { 785db79e6d1SWang Shilong int count; 786db79e6d1SWang Shilong 787db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 788db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 789db79e6d1SWang Shilong count); 790db79e6d1SWang Shilong } 791db79e6d1SWang Shilong set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 792db79e6d1SWang Shilong &grp->bb_state); 793db79e6d1SWang Shilong } 794db79e6d1SWang Shilong } 795db79e6d1SWang Shilong 796617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 797ac27a0ecSDave Kleikamp { 798617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 799ac27a0ecSDave Kleikamp 800617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 801ac27a0ecSDave Kleikamp return; 802ac27a0ecSDave Kleikamp 80312062dddSEric Sandeen ext4_warning(sb, 804ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 805ac27a0ecSDave Kleikamp "running e2fsck is recommended", 806617ba13bSMingming Cao EXT4_DYNAMIC_REV); 807ac27a0ecSDave Kleikamp 808617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 809617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 810617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 811ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 812ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 813ac27a0ecSDave Kleikamp 814ac27a0ecSDave Kleikamp /* 815ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 816ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 817ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 818ac27a0ecSDave Kleikamp */ 819ac27a0ecSDave Kleikamp } 820ac27a0ecSDave Kleikamp 821ac27a0ecSDave Kleikamp /* 822ac27a0ecSDave Kleikamp * Open the external journal device 823ac27a0ecSDave Kleikamp */ 824b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 825ac27a0ecSDave Kleikamp { 826ac27a0ecSDave Kleikamp struct block_device *bdev; 827ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 828ac27a0ecSDave Kleikamp 829d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 830ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 831ac27a0ecSDave Kleikamp goto fail; 832ac27a0ecSDave Kleikamp return bdev; 833ac27a0ecSDave Kleikamp 834ac27a0ecSDave Kleikamp fail: 835b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 836ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 837ac27a0ecSDave Kleikamp return NULL; 838ac27a0ecSDave Kleikamp } 839ac27a0ecSDave Kleikamp 840ac27a0ecSDave Kleikamp /* 841ac27a0ecSDave Kleikamp * Release the journal device 842ac27a0ecSDave Kleikamp */ 8434385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 844ac27a0ecSDave Kleikamp { 8454385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 846ac27a0ecSDave Kleikamp } 847ac27a0ecSDave Kleikamp 8484385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 849ac27a0ecSDave Kleikamp { 850ac27a0ecSDave Kleikamp struct block_device *bdev; 851ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 852ac27a0ecSDave Kleikamp if (bdev) { 8534385bab1SAl Viro ext4_blkdev_put(bdev); 854ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 855ac27a0ecSDave Kleikamp } 856ac27a0ecSDave Kleikamp } 857ac27a0ecSDave Kleikamp 858ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 859ac27a0ecSDave Kleikamp { 860617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 861ac27a0ecSDave Kleikamp } 862ac27a0ecSDave Kleikamp 863617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 864ac27a0ecSDave Kleikamp { 865ac27a0ecSDave Kleikamp struct list_head *l; 866ac27a0ecSDave Kleikamp 867b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 868ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 869ac27a0ecSDave Kleikamp 870ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 871ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 872ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 873ac27a0ecSDave Kleikamp printk(KERN_ERR " " 874ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 875ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 876ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 877ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 878ac27a0ecSDave Kleikamp } 879ac27a0ecSDave Kleikamp } 880ac27a0ecSDave Kleikamp 881957153fcSJan Kara #ifdef CONFIG_QUOTA 882957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 883957153fcSJan Kara 884957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 885957153fcSJan Kara { 886957153fcSJan Kara int type; 887957153fcSJan Kara 888957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 889957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 890957153fcSJan Kara ext4_quota_off(sb, type); 891957153fcSJan Kara } 892957153fcSJan Kara #else 893957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 894957153fcSJan Kara { 895957153fcSJan Kara } 896957153fcSJan Kara #endif 897957153fcSJan Kara 898617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 899ac27a0ecSDave Kleikamp { 900617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 901617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 90297abd7d4STheodore Ts'o int aborted = 0; 903ef2cabf7SHidehiro Kawai int i, err; 904ac27a0ecSDave Kleikamp 905857ac889SLukas Czerner ext4_unregister_li_request(sb); 906957153fcSJan Kara ext4_quota_off_umount(sb); 907e0ccfd95SChristoph Hellwig 9082e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 9094c0425ffSMingming Cao 9100390131bSFrank Mayhar if (sbi->s_journal) { 91197abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 912ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 91347b4a50bSJan Kara sbi->s_journal = NULL; 91497abd7d4STheodore Ts'o if ((err < 0) && !aborted) 915c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 9160390131bSFrank Mayhar } 917d4edac31SJosef Bacik 918ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 919d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 9209105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 921d4edac31SJosef Bacik ext4_release_system_zone(sb); 922d4edac31SJosef Bacik ext4_mb_release(sb); 923d4edac31SJosef Bacik ext4_ext_release(sb); 924d4edac31SJosef Bacik 925bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 926e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 927ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 928ac27a0ecSDave Kleikamp } 929bc98a42cSDavid Howells if (!sb_rdonly(sb)) 930a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 931a8e25a83SArtem Bityutskiy 932ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 933ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 934b93b41d4SAl Viro kvfree(sbi->s_group_desc); 935b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 93657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 937ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 938ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 93957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 940c8585c6fSDaeho Jeong percpu_free_rwsem(&sbi->s_journal_flag_rwsem); 941ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 942a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 943ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 944ac27a0ecSDave Kleikamp #endif 945ac27a0ecSDave Kleikamp 946ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 947ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 948ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 949ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 950ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 951ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 952ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 953ac27a0ecSDave Kleikamp 95489d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 955f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 956ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 957ac27a0ecSDave Kleikamp /* 958ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 959ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 960ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 961ac27a0ecSDave Kleikamp */ 962ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 963f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 964617ba13bSMingming Cao ext4_blkdev_remove(sbi); 965ac27a0ecSDave Kleikamp } 966dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 967dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 968dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 969dec214d0STahsin Erdogan } 97047387409STahsin Erdogan if (sbi->s_ea_block_cache) { 97147387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 97247387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 9739c191f70ST Makphaibulchoke } 974c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 975c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 9769060dd2cSEric Sandeen brelse(sbi->s_sbh); 977ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9783197ebdbSTheodore Ts'o /* 9793197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9803197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9813197ebdbSTheodore Ts'o */ 9823197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9833197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9840441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9850441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 986705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 9875e405595SDan Williams fs_put_dax(sbi->s_daxdev); 988ac27a0ecSDave Kleikamp kfree(sbi); 989ac27a0ecSDave Kleikamp } 990ac27a0ecSDave Kleikamp 991e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 992ac27a0ecSDave Kleikamp 993ac27a0ecSDave Kleikamp /* 994ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 995ac27a0ecSDave Kleikamp */ 996617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 997ac27a0ecSDave Kleikamp { 998617ba13bSMingming Cao struct ext4_inode_info *ei; 999ac27a0ecSDave Kleikamp 1000e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1001ac27a0ecSDave Kleikamp if (!ei) 1002ac27a0ecSDave Kleikamp return NULL; 10030b8e58a1SAndreas Dilger 1004ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1005202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1006c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 1007c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 10089a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 10099a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1010edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1011eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1012edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1013dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1014d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 10159d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 10167e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 1017d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 1018a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1019a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 102096c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1021a9e7f447SDmitry Monakhov #endif 10228aefcd55STheodore Ts'o ei->jinode = NULL; 10232e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1024744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1025b436b9beSJan Kara ei->i_sync_tid = 0; 1026b436b9beSJan Kara ei->i_datasync_tid = 0; 1027e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 10282e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1029ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1030ac27a0ecSDave Kleikamp } 1031ac27a0ecSDave Kleikamp 10327ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 10337ff9c073STheodore Ts'o { 10347ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 10357ff9c073STheodore Ts'o 10367ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 10377ff9c073STheodore Ts'o return drop; 10387ff9c073STheodore Ts'o } 10397ff9c073STheodore Ts'o 1040fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 1041fa0d7e3dSNick Piggin { 1042fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 1043fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1044fa0d7e3dSNick Piggin } 1045fa0d7e3dSNick Piggin 1046617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1047ac27a0ecSDave Kleikamp { 10489f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1049b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1050b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1051b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 10529f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 10539f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 10549f7dd93dSVasily Averin true); 10559f7dd93dSVasily Averin dump_stack(); 10569f7dd93dSVasily Averin } 1057fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1058ac27a0ecSDave Kleikamp } 1059ac27a0ecSDave Kleikamp 106051cc5068SAlexey Dobriyan static void init_once(void *foo) 1061ac27a0ecSDave Kleikamp { 1062617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1063ac27a0ecSDave Kleikamp 1064ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1065ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 10660e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1067ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1068ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1069ac27a0ecSDave Kleikamp } 1070ac27a0ecSDave Kleikamp 1071e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1072ac27a0ecSDave Kleikamp { 1073f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1074f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1075f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1076f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1077f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1078f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 107920c2df83SPaul Mundt init_once); 1080617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1081ac27a0ecSDave Kleikamp return -ENOMEM; 1082ac27a0ecSDave Kleikamp return 0; 1083ac27a0ecSDave Kleikamp } 1084ac27a0ecSDave Kleikamp 1085ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1086ac27a0ecSDave Kleikamp { 10878c0a8537SKirill A. Shutemov /* 10888c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 10898c0a8537SKirill A. Shutemov * destroy cache. 10908c0a8537SKirill A. Shutemov */ 10918c0a8537SKirill A. Shutemov rcu_barrier(); 1092617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1093ac27a0ecSDave Kleikamp } 1094ac27a0ecSDave Kleikamp 10950930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1096ac27a0ecSDave Kleikamp { 10970930fcc1SAl Viro invalidate_inode_buffers(inode); 1098dbd5768fSJan Kara clear_inode(inode); 10999f754758SChristoph Hellwig dquot_drop(inode); 1100c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 110151865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 11028aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 11038aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 11048aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 11058aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 11068aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 11078aefcd55STheodore Ts'o } 11083d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1109ac27a0ecSDave Kleikamp } 1110ac27a0ecSDave Kleikamp 11111b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 11121b961ac0SChristoph Hellwig u64 ino, u32 generation) 1113ac27a0ecSDave Kleikamp { 1114ac27a0ecSDave Kleikamp struct inode *inode; 1115ac27a0ecSDave Kleikamp 1116617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1117ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1118617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1119ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1120ac27a0ecSDave Kleikamp 1121ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1122ac27a0ecSDave Kleikamp * 1123617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1124ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1125ac27a0ecSDave Kleikamp * 1126ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1127ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1128ac27a0ecSDave Kleikamp */ 1129f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 11301d1fe1eeSDavid Howells if (IS_ERR(inode)) 11311d1fe1eeSDavid Howells return ERR_CAST(inode); 11321d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1133ac27a0ecSDave Kleikamp iput(inode); 1134ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1135ac27a0ecSDave Kleikamp } 11361b961ac0SChristoph Hellwig 11371b961ac0SChristoph Hellwig return inode; 1138ac27a0ecSDave Kleikamp } 11391b961ac0SChristoph Hellwig 11401b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11411b961ac0SChristoph Hellwig int fh_len, int fh_type) 11421b961ac0SChristoph Hellwig { 11431b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11441b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11451b961ac0SChristoph Hellwig } 11461b961ac0SChristoph Hellwig 11471b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11481b961ac0SChristoph Hellwig int fh_len, int fh_type) 11491b961ac0SChristoph Hellwig { 11501b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11511b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1152ac27a0ecSDave Kleikamp } 1153ac27a0ecSDave Kleikamp 1154c39a7f84SToshiyuki Okajima /* 1155c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1156c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1157c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1158c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1159c39a7f84SToshiyuki Okajima */ 11600b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11610b8e58a1SAndreas Dilger gfp_t wait) 1162c39a7f84SToshiyuki Okajima { 1163c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1164c39a7f84SToshiyuki Okajima 1165c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1166c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1167c39a7f84SToshiyuki Okajima return 0; 1168c39a7f84SToshiyuki Okajima if (journal) 1169c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1170d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1171c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1172c39a7f84SToshiyuki Okajima } 1173c39a7f84SToshiyuki Okajima 1174a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 1175a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1176a7550b30SJaegeuk Kim { 1177a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1178a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1179a7550b30SJaegeuk Kim } 1180a7550b30SJaegeuk Kim 1181a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1182a7550b30SJaegeuk Kim void *fs_data) 1183a7550b30SJaegeuk Kim { 11842f8f5e76SEric Biggers handle_t *handle = fs_data; 1185c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1186a7550b30SJaegeuk Kim 11879ce0151aSEric Biggers /* 11889ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 11899ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 11909ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 11919ce0151aSEric Biggers * the filename "lost+found" itself. 11929ce0151aSEric Biggers */ 11939ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 11949ce0151aSEric Biggers return -EPERM; 1195a7550b30SJaegeuk Kim 11967d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 11977d3e06a8SRoss Zwisler return -EINVAL; 11987d3e06a8SRoss Zwisler 119994840e3cSEric Biggers res = ext4_convert_inline_data(inode); 120094840e3cSEric Biggers if (res) 120194840e3cSEric Biggers return res; 120294840e3cSEric Biggers 12032f8f5e76SEric Biggers /* 12042f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 12052f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 12062f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 12072f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 12082f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 12092f8f5e76SEric Biggers */ 12102f8f5e76SEric Biggers 12112f8f5e76SEric Biggers if (handle) { 12122f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 12132f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 12142f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12152f8f5e76SEric Biggers ctx, len, 0); 1216a7550b30SJaegeuk Kim if (!res) { 1217a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1218a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1219a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1220a3caa24bSJan Kara /* 12212ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 12222ee6a576SEric Biggers * S_DAX may be disabled 1223a3caa24bSJan Kara */ 1224a3caa24bSJan Kara ext4_set_inode_flags(inode); 1225a7550b30SJaegeuk Kim } 1226a7550b30SJaegeuk Kim return res; 1227a7550b30SJaegeuk Kim } 1228a7550b30SJaegeuk Kim 1229b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1230b8cb5a54STahsin Erdogan if (res) 1231b8cb5a54STahsin Erdogan return res; 12322f8f5e76SEric Biggers retry: 1233af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1234af65207cSTahsin Erdogan &credits); 1235dec214d0STahsin Erdogan if (res) 1236dec214d0STahsin Erdogan return res; 1237dec214d0STahsin Erdogan 1238c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1239a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1240a7550b30SJaegeuk Kim return PTR_ERR(handle); 1241a7550b30SJaegeuk Kim 12422f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 12432f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12442f8f5e76SEric Biggers ctx, len, 0); 1245a7550b30SJaegeuk Kim if (!res) { 1246a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 12472ee6a576SEric Biggers /* 12482ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 12492ee6a576SEric Biggers * S_DAX may be disabled 12502ee6a576SEric Biggers */ 1251a3caa24bSJan Kara ext4_set_inode_flags(inode); 1252a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1253a7550b30SJaegeuk Kim if (res) 1254a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1255a7550b30SJaegeuk Kim } 1256a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 12572f8f5e76SEric Biggers 12582f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 12592f8f5e76SEric Biggers goto retry; 1260a7550b30SJaegeuk Kim if (!res) 1261a7550b30SJaegeuk Kim res = res2; 1262a7550b30SJaegeuk Kim return res; 1263a7550b30SJaegeuk Kim } 1264a7550b30SJaegeuk Kim 1265c250b7ddSEric Biggers static bool ext4_dummy_context(struct inode *inode) 1266a7550b30SJaegeuk Kim { 1267a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1268a7550b30SJaegeuk Kim } 1269a7550b30SJaegeuk Kim 1270a7550b30SJaegeuk Kim static unsigned ext4_max_namelen(struct inode *inode) 1271a7550b30SJaegeuk Kim { 1272a7550b30SJaegeuk Kim return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : 1273a7550b30SJaegeuk Kim EXT4_NAME_LEN; 1274a7550b30SJaegeuk Kim } 1275a7550b30SJaegeuk Kim 12766f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1277a5d431efSEric Biggers .key_prefix = "ext4:", 1278a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1279a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1280a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1281a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1282a7550b30SJaegeuk Kim .max_namelen = ext4_max_namelen, 1283a7550b30SJaegeuk Kim }; 1284a7550b30SJaegeuk Kim #endif 1285a7550b30SJaegeuk Kim 1286ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1287d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1288689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1289ac27a0ecSDave Kleikamp 1290617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1291617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1292617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1293617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1294617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 12956f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 12968c54ca9cSAl Viro const struct path *path); 1297617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1298617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1299ac27a0ecSDave Kleikamp size_t len, loff_t off); 1300617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1301ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 13027c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 13037c319d32SAditya Kali unsigned int flags); 13047c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 13058f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); 1306ac27a0ecSDave Kleikamp 130796c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 130896c7e0d9SJan Kara { 130996c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 131096c7e0d9SJan Kara } 131196c7e0d9SJan Kara 131261e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 131360e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1314617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1315617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1316617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1317617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1318a5b5ee32SJan Kara .write_info = ext4_write_info, 1319a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1320a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1321040cb378SLi Xi .get_projid = ext4_get_projid, 13227a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 13238f0e8746STheodore Ts'o .get_next_id = ext4_get_next_id, 1324ac27a0ecSDave Kleikamp }; 1325ac27a0ecSDave Kleikamp 13260d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1327617ba13bSMingming Cao .quota_on = ext4_quota_on, 1328ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1329287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 13300a240339SJan Kara .get_state = dquot_get_state, 1331287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1332287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 13336332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 13346332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1335ac27a0ecSDave Kleikamp }; 1336ac27a0ecSDave Kleikamp #endif 1337ac27a0ecSDave Kleikamp 1338ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1339617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1340617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1341617ba13bSMingming Cao .write_inode = ext4_write_inode, 1342617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 13437ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 13440930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1345617ba13bSMingming Cao .put_super = ext4_put_super, 1346617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1347c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1348c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1349617ba13bSMingming Cao .statfs = ext4_statfs, 1350617ba13bSMingming Cao .remount_fs = ext4_remount, 1351617ba13bSMingming Cao .show_options = ext4_show_options, 1352ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1353617ba13bSMingming Cao .quota_read = ext4_quota_read, 1354617ba13bSMingming Cao .quota_write = ext4_quota_write, 135596c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1356ac27a0ecSDave Kleikamp #endif 1357c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1358ac27a0ecSDave Kleikamp }; 1359ac27a0ecSDave Kleikamp 136039655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 13611b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 13621b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1363617ba13bSMingming Cao .get_parent = ext4_get_parent, 1364ac27a0ecSDave Kleikamp }; 1365ac27a0ecSDave Kleikamp 1366ac27a0ecSDave Kleikamp enum { 1367ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1368ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 136972578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1370ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 137172578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1372ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1373ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1374ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 13756ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1376ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13775a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1378ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 137949da9392SJan Kara Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, 13801449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1381670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 13821449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 13835328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1384744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1385fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1386cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 1387ac27a0ecSDave Kleikamp }; 1388ac27a0ecSDave Kleikamp 1389a447c093SSteven Whitehouse static const match_table_t tokens = { 1390ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1391ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1392ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1393ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1394ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1395ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1396ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1397ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1398ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1399ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1400ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1401ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1402ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1403ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 140472578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 140572578c33STheodore Ts'o {Opt_removed, "orlov"}, 1406ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1407ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1408ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1409ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1410e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 14115a916be1STheodore Ts'o {Opt_noload, "noload"}, 141272578c33STheodore Ts'o {Opt_removed, "nobh"}, 141372578c33STheodore Ts'o {Opt_removed, "bh"}, 1414ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 141530773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 141630773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1417ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1418ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1419818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1420c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1421818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1422ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1423ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1424ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1425ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 14265bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 14275bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1428ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1429ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1430ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1431ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1432ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1433ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 14345a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1435ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1436ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1437ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1438ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 143949da9392SJan Kara {Opt_prjquota, "prjquota"}, 1440ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 144106705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 144206705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 144325ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1444923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1445c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 144664769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1447a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1448a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1449670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1450dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 145136ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 145236ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 14536fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 14546fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1455240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1456b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1457afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 145806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 145906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1460744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1461744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 14625328e635SEric Sandeen {Opt_discard, "discard"}, 14635328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1464fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1465fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1466fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1467df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 14686ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1469cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1470cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 1471c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1472c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1473c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1474c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1475c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1476f3f12faaSJosef Bacik {Opt_err, NULL}, 1477ac27a0ecSDave Kleikamp }; 1478ac27a0ecSDave Kleikamp 1479617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1480ac27a0ecSDave Kleikamp { 1481617ba13bSMingming Cao ext4_fsblk_t sb_block; 1482ac27a0ecSDave Kleikamp char *options = (char *) *data; 1483ac27a0ecSDave Kleikamp 1484ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1485ac27a0ecSDave Kleikamp return 1; /* Default location */ 14860b8e58a1SAndreas Dilger 1487ac27a0ecSDave Kleikamp options += 3; 14880b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1489ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1490ac27a0ecSDave Kleikamp if (*options && *options != ',') { 14914776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1492ac27a0ecSDave Kleikamp (char *) *data); 1493ac27a0ecSDave Kleikamp return 1; 1494ac27a0ecSDave Kleikamp } 1495ac27a0ecSDave Kleikamp if (*options == ',') 1496ac27a0ecSDave Kleikamp options++; 1497ac27a0ecSDave Kleikamp *data = (void *) options; 14980b8e58a1SAndreas Dilger 1499ac27a0ecSDave Kleikamp return sb_block; 1500ac27a0ecSDave Kleikamp } 1501ac27a0ecSDave Kleikamp 1502b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1503d6006186SEric Biggers static const char deprecated_msg[] = 1504d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1505437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1506b3881f74STheodore Ts'o 150756c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 150856c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 150956c50f11SDmitry Monakhov { 151056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 151156c50f11SDmitry Monakhov char *qname; 151203dafb5fSChen Gang int ret = -1; 151356c50f11SDmitry Monakhov 151456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 151556c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 151656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 151756c50f11SDmitry Monakhov "Cannot change journaled " 151856c50f11SDmitry Monakhov "quota options when quota turned on"); 151957f73c2cSTheodore Ts'o return -1; 152056c50f11SDmitry Monakhov } 1521e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1522c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1523c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1524c325a67cSTheodore Ts'o return 1; 1525262b4662SJan Kara } 152656c50f11SDmitry Monakhov qname = match_strdup(args); 152756c50f11SDmitry Monakhov if (!qname) { 152856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 152956c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 153057f73c2cSTheodore Ts'o return -1; 153156c50f11SDmitry Monakhov } 153203dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 153303dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 153403dafb5fSChen Gang ret = 1; 153503dafb5fSChen Gang else 153656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 153703dafb5fSChen Gang "%s quota file already specified", 153803dafb5fSChen Gang QTYPE2NAME(qtype)); 153903dafb5fSChen Gang goto errout; 154056c50f11SDmitry Monakhov } 154103dafb5fSChen Gang if (strchr(qname, '/')) { 154256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 154356c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 154403dafb5fSChen Gang goto errout; 154556c50f11SDmitry Monakhov } 154603dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1547fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 154856c50f11SDmitry Monakhov return 1; 154903dafb5fSChen Gang errout: 155003dafb5fSChen Gang kfree(qname); 155103dafb5fSChen Gang return ret; 155256c50f11SDmitry Monakhov } 155356c50f11SDmitry Monakhov 155456c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 155556c50f11SDmitry Monakhov { 155656c50f11SDmitry Monakhov 155756c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 155856c50f11SDmitry Monakhov 155956c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 156056c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 156156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 156256c50f11SDmitry Monakhov " when quota turned on"); 156357f73c2cSTheodore Ts'o return -1; 156456c50f11SDmitry Monakhov } 156503dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 156656c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 156756c50f11SDmitry Monakhov return 1; 156856c50f11SDmitry Monakhov } 156956c50f11SDmitry Monakhov #endif 157056c50f11SDmitry Monakhov 157126092bf5STheodore Ts'o #define MOPT_SET 0x0001 157226092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 157326092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 157426092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 157526092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 157626092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 157726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 157826092bf5STheodore Ts'o #define MOPT_Q 0 157926092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 158026092bf5STheodore Ts'o #else 158126092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 158226092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 158326092bf5STheodore Ts'o #endif 158426092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 15858dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 15868dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 15878dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1588ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 158926092bf5STheodore Ts'o 159026092bf5STheodore Ts'o static const struct mount_opts { 159126092bf5STheodore Ts'o int token; 159226092bf5STheodore Ts'o int mount_opt; 159326092bf5STheodore Ts'o int flags; 159426092bf5STheodore Ts'o } ext4_mount_opts[] = { 159526092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 159626092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 159726092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 159826092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 159926092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 160026092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 16018dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 16028dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 16038dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 16048dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 160526092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 160626092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 16078dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 16088dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 16098dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 161059d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1611c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1612c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 16138dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 16141e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 161526092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 16168dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 16171e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 16188dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 161926092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 162026092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 162126092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 16228dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 16237915a861SAles Novak MOPT_NO_EXT2}, 16248dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 16257915a861SAles Novak MOPT_NO_EXT2}, 162626092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 162726092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 162826092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 162926092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 163026092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 163126092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 163226092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 163326092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 163426092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 163526092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1636923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 163726092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 16380efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 16390efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 16405ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16415ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 16425ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16438dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16448dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16458dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 16468dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 164726092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 164826092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 164926092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 165026092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 165126092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 165226092bf5STheodore Ts'o #else 165326092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 165426092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 165526092bf5STheodore Ts'o #endif 165626092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 165726092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1658670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 165926092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 166026092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 166126092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 166226092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 166326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 166449da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 166549da9392SJan Kara MOPT_SET | MOPT_Q}, 166626092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 166749da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 166849da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 166926092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 167026092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 167126092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 167226092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 167326092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 167426092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 167526092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1676df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 16776ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 1678cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 167926092bf5STheodore Ts'o {Opt_err, 0, 0} 168026092bf5STheodore Ts'o }; 168126092bf5STheodore Ts'o 168226092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 168326092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 168426092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 168526092bf5STheodore Ts'o { 168626092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 168726092bf5STheodore Ts'o const struct mount_opts *m; 168808cefc7aSEric W. Biederman kuid_t uid; 168908cefc7aSEric W. Biederman kgid_t gid; 169026092bf5STheodore Ts'o int arg = 0; 169126092bf5STheodore Ts'o 169257f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 169357f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 169457f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 169557f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 169657f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 169757f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 169857f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 169957f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 170057f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 170157f73c2cSTheodore Ts'o #endif 170226092bf5STheodore Ts'o switch (token) { 1703f7048605STheodore Ts'o case Opt_noacl: 1704f7048605STheodore Ts'o case Opt_nouser_xattr: 1705f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1706f7048605STheodore Ts'o break; 170726092bf5STheodore Ts'o case Opt_sb: 170826092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 170926092bf5STheodore Ts'o case Opt_removed: 17105f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 171126092bf5STheodore Ts'o return 1; 171226092bf5STheodore Ts'o case Opt_abort: 171326092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 171426092bf5STheodore Ts'o return 1; 171526092bf5STheodore Ts'o case Opt_i_version: 1716357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 171726092bf5STheodore Ts'o return 1; 1718a26f4992STheodore Ts'o case Opt_lazytime: 17191751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 1720a26f4992STheodore Ts'o return 1; 1721a26f4992STheodore Ts'o case Opt_nolazytime: 17221751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 1723a26f4992STheodore Ts'o return 1; 172426092bf5STheodore Ts'o } 172526092bf5STheodore Ts'o 17265f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 17275f3633e3SJan Kara if (token == m->token) 17285f3633e3SJan Kara break; 17295f3633e3SJan Kara 17305f3633e3SJan Kara if (m->token == Opt_err) { 17315f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 17325f3633e3SJan Kara "or missing value", opt); 17335f3633e3SJan Kara return -1; 17345f3633e3SJan Kara } 17355f3633e3SJan Kara 17368dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 17378dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17388dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 17398dc0aa8cSTheodore Ts'o return -1; 17408dc0aa8cSTheodore Ts'o } 17418dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 17428dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17438dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 17448dc0aa8cSTheodore Ts'o return -1; 17458dc0aa8cSTheodore Ts'o } 17468dc0aa8cSTheodore Ts'o 1747ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 17480efb3b23SJan Kara return -1; 174926092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 175026092bf5STheodore Ts'o return -1; 1751c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1752c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 175326092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 17541e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 17551e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1756c93cf2d7SDmitry Monakhov } else 1757c93cf2d7SDmitry Monakhov return -1; 1758c93cf2d7SDmitry Monakhov } 175926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 176026092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 176126092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 176226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 176326092bf5STheodore Ts'o "options when quota turned on"); 176426092bf5STheodore Ts'o return -1; 176526092bf5STheodore Ts'o } 176626092bf5STheodore Ts'o 176726092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 176826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 176926092bf5STheodore Ts'o } else if (token == Opt_commit) { 177026092bf5STheodore Ts'o if (arg == 0) 177126092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 177226092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 1773670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 1774670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 177526092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 177626092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 177726092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 177826092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 177926092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1780e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1781e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1782e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1783e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 178426092bf5STheodore Ts'o return -1; 178526092bf5STheodore Ts'o } 178626092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 178726092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 178826092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 178926092bf5STheodore Ts'o if (!args->from) 179026092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 179126092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1792df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1793df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 179426092bf5STheodore Ts'o } else if (token == Opt_stripe) { 179526092bf5STheodore Ts'o sbi->s_stripe = arg; 17960efb3b23SJan Kara } else if (token == Opt_resuid) { 17970efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 17980efb3b23SJan Kara if (!uid_valid(uid)) { 17995f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 18000efb3b23SJan Kara return -1; 18010efb3b23SJan Kara } 18020efb3b23SJan Kara sbi->s_resuid = uid; 18030efb3b23SJan Kara } else if (token == Opt_resgid) { 18040efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 18050efb3b23SJan Kara if (!gid_valid(gid)) { 18065f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 18070efb3b23SJan Kara return -1; 18080efb3b23SJan Kara } 18090efb3b23SJan Kara sbi->s_resgid = gid; 18100efb3b23SJan Kara } else if (token == Opt_journal_dev) { 18110efb3b23SJan Kara if (is_remount) { 18120efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 18130efb3b23SJan Kara "Cannot specify journal on remount"); 18140efb3b23SJan Kara return -1; 18150efb3b23SJan Kara } 18160efb3b23SJan Kara *journal_devnum = arg; 1817ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1818ad4eec61SEric Sandeen char *journal_path; 1819ad4eec61SEric Sandeen struct inode *journal_inode; 1820ad4eec61SEric Sandeen struct path path; 1821ad4eec61SEric Sandeen int error; 1822ad4eec61SEric Sandeen 1823ad4eec61SEric Sandeen if (is_remount) { 1824ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1825ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1826ad4eec61SEric Sandeen return -1; 1827ad4eec61SEric Sandeen } 1828ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1829ad4eec61SEric Sandeen if (!journal_path) { 1830ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1831ad4eec61SEric Sandeen "journal device string"); 1832ad4eec61SEric Sandeen return -1; 1833ad4eec61SEric Sandeen } 1834ad4eec61SEric Sandeen 1835ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1836ad4eec61SEric Sandeen if (error) { 1837ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1838ad4eec61SEric Sandeen "journal device path: error %d", error); 1839ad4eec61SEric Sandeen kfree(journal_path); 1840ad4eec61SEric Sandeen return -1; 1841ad4eec61SEric Sandeen } 1842ad4eec61SEric Sandeen 18432b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1844ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1845ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1846ad4eec61SEric Sandeen "is not a block device", journal_path); 1847ad4eec61SEric Sandeen path_put(&path); 1848ad4eec61SEric Sandeen kfree(journal_path); 1849ad4eec61SEric Sandeen return -1; 1850ad4eec61SEric Sandeen } 1851ad4eec61SEric Sandeen 1852ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1853ad4eec61SEric Sandeen path_put(&path); 1854ad4eec61SEric Sandeen kfree(journal_path); 18550efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 18560efb3b23SJan Kara if (arg > 7) { 18575f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 18580efb3b23SJan Kara " (must be 0-7)"); 18590efb3b23SJan Kara return -1; 18600efb3b23SJan Kara } 18610efb3b23SJan Kara *journal_ioprio = 18620efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 18636ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 18646ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 18656ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 18666ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18676ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 18686ddb2447STheodore Ts'o #else 18696ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18706ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 18716ddb2447STheodore Ts'o #endif 187226092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 187326092bf5STheodore Ts'o if (is_remount) { 187426092bf5STheodore Ts'o if (!sbi->s_journal) 187526092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 18765f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 187726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 187826092bf5STheodore Ts'o "Cannot change data mode on remount"); 187926092bf5STheodore Ts'o return -1; 188026092bf5STheodore Ts'o } 188126092bf5STheodore Ts'o } else { 188226092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 188326092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 188426092bf5STheodore Ts'o } 188526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 188626092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 188726092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 188826092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 18895f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 18905f3633e3SJan Kara "quota options when quota turned on"); 189126092bf5STheodore Ts'o return -1; 189226092bf5STheodore Ts'o } 1893e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1894c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 1895c325a67cSTheodore Ts'o "Quota format mount options ignored " 1896262b4662SJan Kara "when QUOTA feature is enabled"); 1897c325a67cSTheodore Ts'o return 1; 1898262b4662SJan Kara } 189926092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 190026092bf5STheodore Ts'o #endif 1901923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1902ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1903ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1904ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1905ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1906ef83b6e8SDan Williams #else 1907923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1908923ae0ffSRoss Zwisler return -1; 1909923ae0ffSRoss Zwisler #endif 19107915a861SAles Novak } else if (token == Opt_data_err_abort) { 19117915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 19127915a861SAles Novak } else if (token == Opt_data_err_ignore) { 19137915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 191426092bf5STheodore Ts'o } else { 191526092bf5STheodore Ts'o if (!args->from) 191626092bf5STheodore Ts'o arg = 1; 191726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 191826092bf5STheodore Ts'o arg = !arg; 191926092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 192026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 192126092bf5STheodore Ts'o "buggy handling of option %s", opt); 192226092bf5STheodore Ts'o WARN_ON(1); 192326092bf5STheodore Ts'o return -1; 192426092bf5STheodore Ts'o } 192526092bf5STheodore Ts'o if (arg != 0) 192626092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 192726092bf5STheodore Ts'o else 192826092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 192926092bf5STheodore Ts'o } 193026092bf5STheodore Ts'o return 1; 193126092bf5STheodore Ts'o } 193226092bf5STheodore Ts'o 1933ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1934c3191067STheodore Ts'o unsigned long *journal_devnum, 1935b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1936661aa520SEric Sandeen int is_remount) 1937ac27a0ecSDave Kleikamp { 1938617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1939ac27a0ecSDave Kleikamp char *p; 1940ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 194126092bf5STheodore Ts'o int token; 1942ac27a0ecSDave Kleikamp 1943ac27a0ecSDave Kleikamp if (!options) 1944ac27a0ecSDave Kleikamp return 1; 1945ac27a0ecSDave Kleikamp 1946ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1947ac27a0ecSDave Kleikamp if (!*p) 1948ac27a0ecSDave Kleikamp continue; 194915121c18SEric Sandeen /* 195015121c18SEric Sandeen * Initialize args struct so we know whether arg was 195115121c18SEric Sandeen * found; some options take optional arguments. 195215121c18SEric Sandeen */ 1953caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1954ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 195526092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 195626092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1957ac27a0ecSDave Kleikamp return 0; 1958ac27a0ecSDave Kleikamp } 1959ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 196049da9392SJan Kara /* 196149da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 196249da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 196349da9392SJan Kara * to support legacy quotas in quota files. 196449da9392SJan Kara */ 196549da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 196649da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 196749da9392SJan Kara "Cannot enable project quota enforcement."); 196849da9392SJan Kara return 0; 196949da9392SJan Kara } 197049da9392SJan Kara if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1971482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1972fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1973ac27a0ecSDave Kleikamp 1974482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1975fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1976ac27a0ecSDave Kleikamp 197756c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1978b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1979b31e1552SEric Sandeen "format mixing"); 1980ac27a0ecSDave Kleikamp return 0; 1981ac27a0ecSDave Kleikamp } 1982ac27a0ecSDave Kleikamp 1983ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1984b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1985b31e1552SEric Sandeen "not specified"); 1986ac27a0ecSDave Kleikamp return 0; 1987ac27a0ecSDave Kleikamp } 1988ac27a0ecSDave Kleikamp } 1989ac27a0ecSDave Kleikamp #endif 1990261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1991261cb20cSJan Kara int blocksize = 1992261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1993261cb20cSJan Kara 199409cbfeafSKirill A. Shutemov if (blocksize < PAGE_SIZE) { 1995261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1996261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1997261cb20cSJan Kara return 0; 1998261cb20cSJan Kara } 1999261cb20cSJan Kara } 2000ac27a0ecSDave Kleikamp return 1; 2001ac27a0ecSDave Kleikamp } 2002ac27a0ecSDave Kleikamp 20032adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 20042adf6da8STheodore Ts'o struct super_block *sb) 20052adf6da8STheodore Ts'o { 20062adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 20072adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 20082adf6da8STheodore Ts'o 20092adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 20102adf6da8STheodore Ts'o char *fmtname = ""; 20112adf6da8STheodore Ts'o 20122adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 20132adf6da8STheodore Ts'o case QFMT_VFS_OLD: 20142adf6da8STheodore Ts'o fmtname = "vfsold"; 20152adf6da8STheodore Ts'o break; 20162adf6da8STheodore Ts'o case QFMT_VFS_V0: 20172adf6da8STheodore Ts'o fmtname = "vfsv0"; 20182adf6da8STheodore Ts'o break; 20192adf6da8STheodore Ts'o case QFMT_VFS_V1: 20202adf6da8STheodore Ts'o fmtname = "vfsv1"; 20212adf6da8STheodore Ts'o break; 20222adf6da8STheodore Ts'o } 20232adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 20242adf6da8STheodore Ts'o } 20252adf6da8STheodore Ts'o 20262adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 2027a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 20282adf6da8STheodore Ts'o 20292adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 2030a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 20312adf6da8STheodore Ts'o #endif 20322adf6da8STheodore Ts'o } 20332adf6da8STheodore Ts'o 20345a916be1STheodore Ts'o static const char *token2str(int token) 20355a916be1STheodore Ts'o { 203650df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 20375a916be1STheodore Ts'o 20385a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 20395a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 20405a916be1STheodore Ts'o break; 20415a916be1STheodore Ts'o return t->pattern; 20425a916be1STheodore Ts'o } 20435a916be1STheodore Ts'o 20442adf6da8STheodore Ts'o /* 20452adf6da8STheodore Ts'o * Show an option if 20462adf6da8STheodore Ts'o * - it's set to a non-default value OR 20472adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 20482adf6da8STheodore Ts'o */ 204966acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 205066acdcf4STheodore Ts'o int nodefs) 20512adf6da8STheodore Ts'o { 20522adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 20532adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 205468afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 20555a916be1STheodore Ts'o const struct mount_opts *m; 205666acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 20572adf6da8STheodore Ts'o 205866acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 205966acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 20602adf6da8STheodore Ts'o 20612adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 20625a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 20635a916be1STheodore Ts'o 20645a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 20655a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 20665a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 20675a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 20685a916be1STheodore Ts'o continue; 206968afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 20705a916be1STheodore Ts'o continue; /* skip if same as the default */ 20715a916be1STheodore Ts'o if ((want_set && 20725a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 20735a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 20745a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 20755a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 20765a916be1STheodore Ts'o } 20775a916be1STheodore Ts'o 207808cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 20795a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 208008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 208108cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 208208cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 20835a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 208408cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 208508cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 208666acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 20875a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 20885a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 20892adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 20905a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 20912adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 20925a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 209366acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 20945a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 209566acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 20965a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 209766acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 20985a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2099357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 21005a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 210166acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 21025a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 210368afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 210468afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 21052adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 21065a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 21072adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 21085a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 21092adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 21105a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 21115a916be1STheodore Ts'o } 211266acdcf4STheodore Ts'o if (nodefs || 211366acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 21145a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 21152adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 21162adf6da8STheodore Ts'o 2117ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 211866acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 21195a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2120df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2121df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 21227915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 21237915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 21242adf6da8STheodore Ts'o 21252adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 21262adf6da8STheodore Ts'o return 0; 21272adf6da8STheodore Ts'o } 21282adf6da8STheodore Ts'o 212966acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 213066acdcf4STheodore Ts'o { 213166acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 213266acdcf4STheodore Ts'o } 213366acdcf4STheodore Ts'o 2134ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 213566acdcf4STheodore Ts'o { 213666acdcf4STheodore Ts'o struct super_block *sb = seq->private; 213766acdcf4STheodore Ts'o int rc; 213866acdcf4STheodore Ts'o 2139bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 214066acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 214166acdcf4STheodore Ts'o seq_puts(seq, "\n"); 214266acdcf4STheodore Ts'o return rc; 214366acdcf4STheodore Ts'o } 214466acdcf4STheodore Ts'o 2145617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2146ac27a0ecSDave Kleikamp int read_only) 2147ac27a0ecSDave Kleikamp { 2148617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2149c89128a0SJaegeuk Kim int err = 0; 2150ac27a0ecSDave Kleikamp 2151617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2152b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2153b31e1552SEric Sandeen "forcing read-only mode"); 2154c89128a0SJaegeuk Kim err = -EROFS; 2155ac27a0ecSDave Kleikamp } 2156ac27a0ecSDave Kleikamp if (read_only) 2157281b5995STheodore Ts'o goto done; 2158617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2159b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2160b31e1552SEric Sandeen "running e2fsck is recommended"); 2161c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2162b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2163b31e1552SEric Sandeen "warning: mounting fs with errors, " 2164b31e1552SEric Sandeen "running e2fsck is recommended"); 2165ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2166ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2167ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2168b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2169b31e1552SEric Sandeen "warning: maximal mount count reached, " 2170b31e1552SEric Sandeen "running e2fsck is recommended"); 2171ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 2172ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 2173ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 2174b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2175b31e1552SEric Sandeen "warning: checktime reached, " 2176b31e1552SEric Sandeen "running e2fsck is recommended"); 21770390131bSFrank Mayhar if (!sbi->s_journal) 2178216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2179ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2180617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2181e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 2182ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 2183617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 21840390131bSFrank Mayhar if (sbi->s_journal) 2185e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2186ac27a0ecSDave Kleikamp 2187c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 2188281b5995STheodore Ts'o done: 2189ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2190a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2191a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2192ac27a0ecSDave Kleikamp sb->s_blocksize, 2193ac27a0ecSDave Kleikamp sbi->s_groups_count, 2194617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2195617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2196a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2197ac27a0ecSDave Kleikamp 21987abc52c2SDan Magenheimer cleancache_init_fs(sb); 2199c89128a0SJaegeuk Kim return err; 2200ac27a0ecSDave Kleikamp } 2201ac27a0ecSDave Kleikamp 2202117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2203117fff10STheodore Ts'o { 2204117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2205117fff10STheodore Ts'o struct flex_groups *new_groups; 2206117fff10STheodore Ts'o int size; 2207117fff10STheodore Ts'o 2208117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2209117fff10STheodore Ts'o return 0; 2210117fff10STheodore Ts'o 2211117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2212117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2213117fff10STheodore Ts'o return 0; 2214117fff10STheodore Ts'o 2215117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2216a7c3e901SMichal Hocko new_groups = kvzalloc(size, GFP_KERNEL); 2217117fff10STheodore Ts'o if (!new_groups) { 2218117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2219117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2220117fff10STheodore Ts'o return -ENOMEM; 2221117fff10STheodore Ts'o } 2222117fff10STheodore Ts'o 2223117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2224117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2225117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2226117fff10STheodore Ts'o sizeof(struct flex_groups))); 2227b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2228117fff10STheodore Ts'o } 2229117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2230117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2231117fff10STheodore Ts'o return 0; 2232117fff10STheodore Ts'o } 2233117fff10STheodore Ts'o 2234772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2235772cb7c8SJose R. Santos { 2236772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2237772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2238772cb7c8SJose R. Santos ext4_group_t flex_group; 2239117fff10STheodore Ts'o int i, err; 2240772cb7c8SJose R. Santos 2241503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2242d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2243772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2244772cb7c8SJose R. Santos return 1; 2245772cb7c8SJose R. Santos } 2246772cb7c8SJose R. Santos 2247117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2248117fff10STheodore Ts'o if (err) 2249772cb7c8SJose R. Santos goto failed; 2250772cb7c8SJose R. Santos 2251772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 225288b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2253772cb7c8SJose R. Santos 2254772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 22557ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 22567ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 225790ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 225824aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 22597ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 22607ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2261772cb7c8SJose R. Santos } 2262772cb7c8SJose R. Santos 2263772cb7c8SJose R. Santos return 1; 2264772cb7c8SJose R. Santos failed: 2265772cb7c8SJose R. Santos return 0; 2266772cb7c8SJose R. Santos } 2267772cb7c8SJose R. Santos 2268e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2269717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2270717d50e4SAndreas Dilger { 2271b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2272717d50e4SAndreas Dilger __u16 crc = 0; 2273717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2274e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2275717d50e4SAndreas Dilger 22769aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2277feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2278feb0ab32SDarrick J. Wong __u32 csum32; 2279b47820edSDaeho Jeong __u16 dummy_csum = 0; 2280feb0ab32SDarrick J. Wong 2281feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2282feb0ab32SDarrick J. Wong sizeof(le_group)); 2283b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2284b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2285b47820edSDaeho Jeong sizeof(dummy_csum)); 2286b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2287b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2288b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2289b47820edSDaeho Jeong sbi->s_desc_size - offset); 2290feb0ab32SDarrick J. Wong 2291feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2292feb0ab32SDarrick J. Wong goto out; 2293feb0ab32SDarrick J. Wong } 2294feb0ab32SDarrick J. Wong 2295feb0ab32SDarrick J. Wong /* old crc16 code */ 2296e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2297813d32f9SDarrick J. Wong return 0; 2298813d32f9SDarrick J. Wong 2299717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2300717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2301717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2302717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2303717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2304e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2305717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2306717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2307717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2308717d50e4SAndreas Dilger offset); 2309717d50e4SAndreas Dilger 2310feb0ab32SDarrick J. Wong out: 2311717d50e4SAndreas Dilger return cpu_to_le16(crc); 2312717d50e4SAndreas Dilger } 2313717d50e4SAndreas Dilger 2314feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2315717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2316717d50e4SAndreas Dilger { 2317feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2318e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2319717d50e4SAndreas Dilger return 0; 2320717d50e4SAndreas Dilger 2321717d50e4SAndreas Dilger return 1; 2322717d50e4SAndreas Dilger } 2323717d50e4SAndreas Dilger 2324feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2325feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2326feb0ab32SDarrick J. Wong { 2327feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2328feb0ab32SDarrick J. Wong return; 2329e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2330feb0ab32SDarrick J. Wong } 2331feb0ab32SDarrick J. Wong 2332ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2333bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2334829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2335bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2336ac27a0ecSDave Kleikamp { 2337617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2338617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2339617ba13bSMingming Cao ext4_fsblk_t last_block; 2340bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2341bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2342bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2343ce421581SJose R. Santos int flexbg_flag = 0; 2344bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2345ac27a0ecSDave Kleikamp 2346e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2347ce421581SJose R. Santos flexbg_flag = 1; 2348ce421581SJose R. Santos 2349617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2350ac27a0ecSDave Kleikamp 2351197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2352197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2353197cd65aSAkinobu Mita 2354ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2355bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2356ac27a0ecSDave Kleikamp else 2357ac27a0ecSDave Kleikamp last_block = first_block + 2358617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2359ac27a0ecSDave Kleikamp 2360bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2361bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2362bfff6873SLukas Czerner grp = i; 2363bfff6873SLukas Czerner 23648fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2365829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2366829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2367829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2368829fa70dSTheodore Ts'o "superblock", i); 236918db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 237018db4b4eSTheodore Ts'o return 0; 2371829fa70dSTheodore Ts'o } 23722b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2373b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2374a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2375b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2376ac27a0ecSDave Kleikamp return 0; 2377ac27a0ecSDave Kleikamp } 23788fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2379829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2380829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2381829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2382829fa70dSTheodore Ts'o "superblock", i); 238318db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 238418db4b4eSTheodore Ts'o return 0; 2385829fa70dSTheodore Ts'o } 23862b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2387b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2388a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2389b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2390ac27a0ecSDave Kleikamp return 0; 2391ac27a0ecSDave Kleikamp } 23928fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2393829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2394829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2395829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2396829fa70dSTheodore Ts'o "superblock", i); 239718db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 239818db4b4eSTheodore Ts'o return 0; 2399829fa70dSTheodore Ts'o } 2400bd81d8eeSLaurent Vivier if (inode_table < first_block || 24012b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2402b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2403a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2404b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2405ac27a0ecSDave Kleikamp return 0; 2406ac27a0ecSDave Kleikamp } 2407955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2408feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2409b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2410b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2411e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2412fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 2413bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 2414955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2415717d50e4SAndreas Dilger return 0; 2416717d50e4SAndreas Dilger } 24177ee1ec4cSLi Zefan } 2418955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2419ce421581SJose R. Santos if (!flexbg_flag) 2420617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2421ac27a0ecSDave Kleikamp } 2422bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2423bfff6873SLukas Czerner *first_not_zeroed = grp; 2424ac27a0ecSDave Kleikamp return 1; 2425ac27a0ecSDave Kleikamp } 2426ac27a0ecSDave Kleikamp 2427617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2428ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2429ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2430ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2431ac27a0ecSDave Kleikamp * 2432ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2433ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2434ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2435ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2436ac27a0ecSDave Kleikamp * 2437ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2438ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2439ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2440617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2441ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2442ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2443ac27a0ecSDave Kleikamp */ 2444617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2445617ba13bSMingming Cao struct ext4_super_block *es) 2446ac27a0ecSDave Kleikamp { 2447ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 24482c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2449ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 245095f1fda4Szhangyi (F) int quota_update = 0; 2451ac27a0ecSDave Kleikamp int i; 2452ac27a0ecSDave Kleikamp #endif 2453ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2454ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2455ac27a0ecSDave Kleikamp return; 2456ac27a0ecSDave Kleikamp } 2457ac27a0ecSDave Kleikamp 2458a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2459b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2460b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2461a8f48a95SEric Sandeen return; 2462a8f48a95SEric Sandeen } 2463a8f48a95SEric Sandeen 2464d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2465d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2466d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2467d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2468d39195c3SAmir Goldstein return; 2469d39195c3SAmir Goldstein } 2470d39195c3SAmir Goldstein 2471617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2472c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 24731751e8a6SLinus Torvalds if (es->s_last_orphan && !(s_flags & SB_RDONLY)) { 247484474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2475ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2476ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2477c25f9bc6SEric Sandeen } 2478ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2479ac27a0ecSDave Kleikamp return; 2480ac27a0ecSDave Kleikamp } 2481ac27a0ecSDave Kleikamp 24821751e8a6SLinus Torvalds if (s_flags & SB_RDONLY) { 2483b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 24841751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 2485ac27a0ecSDave Kleikamp } 2486ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2487ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 24881751e8a6SLinus Torvalds sb->s_flags |= SB_ACTIVE; 248995f1fda4Szhangyi (F) 249095f1fda4Szhangyi (F) /* 249195f1fda4Szhangyi (F) * Turn on quotas which were not enabled for read-only mounts if 249295f1fda4Szhangyi (F) * filesystem has quota feature, so that they are updated correctly. 249395f1fda4Szhangyi (F) */ 24941751e8a6SLinus Torvalds if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) { 249595f1fda4Szhangyi (F) int ret = ext4_enable_quotas(sb); 249695f1fda4Szhangyi (F) 249795f1fda4Szhangyi (F) if (!ret) 249895f1fda4Szhangyi (F) quota_update = 1; 249995f1fda4Szhangyi (F) else 250095f1fda4Szhangyi (F) ext4_msg(sb, KERN_ERR, 250195f1fda4Szhangyi (F) "Cannot turn on quotas: error %d", ret); 250295f1fda4Szhangyi (F) } 250395f1fda4Szhangyi (F) 250495f1fda4Szhangyi (F) /* Turn on journaled quotas used for old sytle */ 2505a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2506617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2507617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 250895f1fda4Szhangyi (F) 250995f1fda4Szhangyi (F) if (!ret) 251095f1fda4Szhangyi (F) quota_update = 1; 251195f1fda4Szhangyi (F) else 2512b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2513b31e1552SEric Sandeen "Cannot turn on journaled " 251495f1fda4Szhangyi (F) "quota: type %d: error %d", i, ret); 2515ac27a0ecSDave Kleikamp } 2516ac27a0ecSDave Kleikamp } 2517ac27a0ecSDave Kleikamp #endif 2518ac27a0ecSDave Kleikamp 2519ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2520ac27a0ecSDave Kleikamp struct inode *inode; 2521ac27a0ecSDave Kleikamp 2522c65d5c6cSVegard Nossum /* 2523c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2524c65d5c6cSVegard Nossum * so, skip the rest. 2525c65d5c6cSVegard Nossum */ 2526c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2527c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2528c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2529c65d5c6cSVegard Nossum break; 2530c65d5c6cSVegard Nossum } 2531c65d5c6cSVegard Nossum 253297bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 253397bd42b9SJosef Bacik if (IS_ERR(inode)) { 2534ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2535ac27a0ecSDave Kleikamp break; 2536ac27a0ecSDave Kleikamp } 2537ac27a0ecSDave Kleikamp 2538617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2539871a2931SChristoph Hellwig dquot_initialize(inode); 2540ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2541566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2542b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2543b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 254446e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2545e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2546ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 25475955102cSAl Viro inode_lock(inode); 254855f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 25492c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 25502c98eb5eSTheodore Ts'o if (ret) 25512c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 25525955102cSAl Viro inode_unlock(inode); 2553ac27a0ecSDave Kleikamp nr_truncates++; 2554ac27a0ecSDave Kleikamp } else { 2555566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2556b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2557b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 255846e665e9SHarvey Harrison __func__, inode->i_ino); 2559ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2560ac27a0ecSDave Kleikamp inode->i_ino); 2561ac27a0ecSDave Kleikamp nr_orphans++; 2562ac27a0ecSDave Kleikamp } 2563ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2564ac27a0ecSDave Kleikamp } 2565ac27a0ecSDave Kleikamp 2566ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2567ac27a0ecSDave Kleikamp 2568ac27a0ecSDave Kleikamp if (nr_orphans) 2569b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2570b31e1552SEric Sandeen PLURAL(nr_orphans)); 2571ac27a0ecSDave Kleikamp if (nr_truncates) 2572b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2573b31e1552SEric Sandeen PLURAL(nr_truncates)); 2574ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 257595f1fda4Szhangyi (F) /* Turn off quotas if they were enabled for orphan cleanup */ 257695f1fda4Szhangyi (F) if (quota_update) { 2577a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 257895f1fda4Szhangyi (F) if (sb_dqopt(sb)->files[i]) 2579287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2580ac27a0ecSDave Kleikamp } 258195f1fda4Szhangyi (F) } 2582ac27a0ecSDave Kleikamp #endif 25831751e8a6SLinus Torvalds sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 2584ac27a0ecSDave Kleikamp } 25850b8e58a1SAndreas Dilger 2586cd2291a4SEric Sandeen /* 2587cd2291a4SEric Sandeen * Maximal extent format file size. 2588cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2589cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2590cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2591cd2291a4SEric Sandeen * so that won't be a limiting factor. 2592cd2291a4SEric Sandeen * 2593f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2594f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2595f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2596f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2597f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2598f17722f9SLukas Czerner * 2599cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2600cd2291a4SEric Sandeen */ 2601f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2602cd2291a4SEric Sandeen { 2603cd2291a4SEric Sandeen loff_t res; 2604cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2605cd2291a4SEric Sandeen 2606cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2607f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2608cd2291a4SEric Sandeen /* 260990c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2610cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2611cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2612cd2291a4SEric Sandeen */ 2613cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2614cd2291a4SEric Sandeen 2615cd2291a4SEric Sandeen /* total blocks in file system block size */ 2616cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2617cd2291a4SEric Sandeen upper_limit <<= blkbits; 2618cd2291a4SEric Sandeen } 2619cd2291a4SEric Sandeen 2620f17722f9SLukas Czerner /* 2621f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2622f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2623f17722f9SLukas Czerner * size 2624f17722f9SLukas Czerner */ 2625f17722f9SLukas Czerner res = (1LL << 32) - 1; 2626cd2291a4SEric Sandeen res <<= blkbits; 2627cd2291a4SEric Sandeen 2628cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2629cd2291a4SEric Sandeen if (res > upper_limit) 2630cd2291a4SEric Sandeen res = upper_limit; 2631cd2291a4SEric Sandeen 2632cd2291a4SEric Sandeen return res; 2633cd2291a4SEric Sandeen } 2634ac27a0ecSDave Kleikamp 2635ac27a0ecSDave Kleikamp /* 2636cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 26370fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 26380fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2639ac27a0ecSDave Kleikamp */ 2640f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2641ac27a0ecSDave Kleikamp { 2642617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 26430fc1b451SAneesh Kumar K.V int meta_blocks; 26440fc1b451SAneesh Kumar K.V loff_t upper_limit; 26450b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 26460b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 26470b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 26480b8e58a1SAndreas Dilger * 26490b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 26500b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 26510fc1b451SAneesh Kumar K.V */ 26520fc1b451SAneesh Kumar K.V 2653f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 26540fc1b451SAneesh Kumar K.V /* 265590c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 26560b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 26570b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 26580fc1b451SAneesh Kumar K.V */ 26590fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 26600fc1b451SAneesh Kumar K.V 26610fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 26620fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 26630fc1b451SAneesh Kumar K.V 26640fc1b451SAneesh Kumar K.V } else { 26658180a562SAneesh Kumar K.V /* 26668180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 26678180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 26688180a562SAneesh Kumar K.V * represent total number of blocks in 26698180a562SAneesh Kumar K.V * file system block size 26708180a562SAneesh Kumar K.V */ 26710fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 26720fc1b451SAneesh Kumar K.V 26730fc1b451SAneesh Kumar K.V } 26740fc1b451SAneesh Kumar K.V 26750fc1b451SAneesh Kumar K.V /* indirect blocks */ 26760fc1b451SAneesh Kumar K.V meta_blocks = 1; 26770fc1b451SAneesh Kumar K.V /* double indirect blocks */ 26780fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 26790fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 26800fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 26810fc1b451SAneesh Kumar K.V 26820fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 26830fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2684ac27a0ecSDave Kleikamp 2685ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2686ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2687ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2688ac27a0ecSDave Kleikamp res <<= bits; 2689ac27a0ecSDave Kleikamp if (res > upper_limit) 2690ac27a0ecSDave Kleikamp res = upper_limit; 26910fc1b451SAneesh Kumar K.V 26920fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 26930fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 26940fc1b451SAneesh Kumar K.V 2695ac27a0ecSDave Kleikamp return res; 2696ac27a0ecSDave Kleikamp } 2697ac27a0ecSDave Kleikamp 2698617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 269970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2700ac27a0ecSDave Kleikamp { 2701617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2702fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2703ac27a0ecSDave Kleikamp int has_super = 0; 2704ac27a0ecSDave Kleikamp 2705ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2706ac27a0ecSDave Kleikamp 2707e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 270870bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2709ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2710617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2711ac27a0ecSDave Kleikamp has_super = 1; 27120b8e58a1SAndreas Dilger 2713bd63f6b0SDarrick J. Wong /* 2714bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2715bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2716bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2717bd63f6b0SDarrick J. Wong * compensate. 2718bd63f6b0SDarrick J. Wong */ 2719bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 272049598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 2721bd63f6b0SDarrick J. Wong has_super++; 2722bd63f6b0SDarrick J. Wong 2723617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2724ac27a0ecSDave Kleikamp } 2725ac27a0ecSDave Kleikamp 2726c9de560dSAlex Tomas /** 2727c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2728c9de560dSAlex Tomas * @sbi: In memory super block info 2729c9de560dSAlex Tomas * 2730c9de560dSAlex Tomas * If we have specified it via mount option, then 2731c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2732c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2733c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2734c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2735c9de560dSAlex Tomas * 2736c9de560dSAlex Tomas */ 2737c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2738c9de560dSAlex Tomas { 2739c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2740c9de560dSAlex Tomas unsigned long stripe_width = 2741c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 27423eb08658SDan Ehrenberg int ret; 2743c9de560dSAlex Tomas 2744c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 27453eb08658SDan Ehrenberg ret = sbi->s_stripe; 27465469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 27473eb08658SDan Ehrenberg ret = stripe_width; 27485469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 27493eb08658SDan Ehrenberg ret = stride; 27503eb08658SDan Ehrenberg else 27513eb08658SDan Ehrenberg ret = 0; 2752c9de560dSAlex Tomas 27533eb08658SDan Ehrenberg /* 27543eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 27553eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 27563eb08658SDan Ehrenberg */ 27573eb08658SDan Ehrenberg if (ret <= 1) 27583eb08658SDan Ehrenberg ret = 0; 2759c9de560dSAlex Tomas 27603eb08658SDan Ehrenberg return ret; 2761c9de560dSAlex Tomas } 2762ac27a0ecSDave Kleikamp 2763a13fb1a4SEric Sandeen /* 2764a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2765a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2766a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2767a13fb1a4SEric Sandeen * 0 if it cannot be. 2768a13fb1a4SEric Sandeen */ 2769a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2770a13fb1a4SEric Sandeen { 2771e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2772a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2773a13fb1a4SEric Sandeen "Couldn't mount because of " 2774a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2775a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2776a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2777a13fb1a4SEric Sandeen return 0; 2778a13fb1a4SEric Sandeen } 2779a13fb1a4SEric Sandeen 2780a13fb1a4SEric Sandeen if (readonly) 2781a13fb1a4SEric Sandeen return 1; 2782a13fb1a4SEric Sandeen 2783e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 27842cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 27851751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 27862cb5cc8bSDarrick J. Wong return 1; 27872cb5cc8bSDarrick J. Wong } 27882cb5cc8bSDarrick J. Wong 2789a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2790e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2791a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2792a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2793a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2794a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2795a13fb1a4SEric Sandeen return 0; 2796a13fb1a4SEric Sandeen } 2797a13fb1a4SEric Sandeen /* 2798a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2799a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2800a13fb1a4SEric Sandeen */ 2801e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2802a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2803a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2804a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2805a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2806a13fb1a4SEric Sandeen return 0; 2807a13fb1a4SEric Sandeen } 2808a13fb1a4SEric Sandeen } 2809e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2810bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2811bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2812bab08ab9STheodore Ts'o "extents feature\n"); 2813bab08ab9STheodore Ts'o return 0; 2814bab08ab9STheodore Ts'o } 28157c319d32SAditya Kali 28167c319d32SAditya Kali #ifndef CONFIG_QUOTA 2817e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 28187c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28197c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28207c319d32SAditya Kali "without CONFIG_QUOTA"); 28217c319d32SAditya Kali return 0; 28227c319d32SAditya Kali } 2823689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2824689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2825689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2826689c958cSLi Xi "without CONFIG_QUOTA"); 2827689c958cSLi Xi return 0; 2828689c958cSLi Xi } 28297c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2830a13fb1a4SEric Sandeen return 1; 2831a13fb1a4SEric Sandeen } 2832a13fb1a4SEric Sandeen 283366e61a9eSTheodore Ts'o /* 283466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 283566e61a9eSTheodore Ts'o * on the file system 283666e61a9eSTheodore Ts'o */ 2837235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 283866e61a9eSTheodore Ts'o { 2839235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 2840235699a8SKees Cook struct super_block *sb = sbi->s_sb; 2841235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 284266e61a9eSTheodore Ts'o 284366e61a9eSTheodore Ts'o if (es->s_error_count) 2844ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2845ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 284666e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 284766e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2848ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 284966e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 285066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 285166e61a9eSTheodore Ts'o es->s_first_error_func, 285266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 285366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 2854651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 285566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 285666e61a9eSTheodore Ts'o if (es->s_first_error_block) 2857651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 285866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 2859651e1c3bSJoe Perches printk(KERN_CONT "\n"); 286066e61a9eSTheodore Ts'o } 286166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2862ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 286366e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 286466e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 286566e61a9eSTheodore Ts'o es->s_last_error_func, 286666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 286766e61a9eSTheodore Ts'o if (es->s_last_error_ino) 2868651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 286966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 287066e61a9eSTheodore Ts'o if (es->s_last_error_block) 2871651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 287266e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 2873651e1c3bSJoe Perches printk(KERN_CONT "\n"); 287466e61a9eSTheodore Ts'o } 287566e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 287666e61a9eSTheodore Ts'o } 287766e61a9eSTheodore Ts'o 2878bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2879bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2880bfff6873SLukas Czerner { 2881bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2882bfff6873SLukas Czerner ext4_group_t group, ngroups; 2883bfff6873SLukas Czerner struct super_block *sb; 2884bfff6873SLukas Czerner unsigned long timeout = 0; 2885bfff6873SLukas Czerner int ret = 0; 2886bfff6873SLukas Czerner 2887bfff6873SLukas Czerner sb = elr->lr_super; 2888bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2889bfff6873SLukas Czerner 2890bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2891bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2892bfff6873SLukas Czerner if (!gdp) { 2893bfff6873SLukas Czerner ret = 1; 2894bfff6873SLukas Czerner break; 2895bfff6873SLukas Czerner } 2896bfff6873SLukas Czerner 2897bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2898bfff6873SLukas Czerner break; 2899bfff6873SLukas Czerner } 2900bfff6873SLukas Czerner 29017f511862STheodore Ts'o if (group >= ngroups) 2902bfff6873SLukas Czerner ret = 1; 2903bfff6873SLukas Czerner 2904bfff6873SLukas Czerner if (!ret) { 2905bfff6873SLukas Czerner timeout = jiffies; 2906bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2907bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2908bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 290951ce6511SLukas Czerner timeout = (jiffies - timeout) * 291051ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2911bfff6873SLukas Czerner elr->lr_timeout = timeout; 2912bfff6873SLukas Czerner } 2913bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2914bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2915bfff6873SLukas Czerner } 2916bfff6873SLukas Czerner return ret; 2917bfff6873SLukas Czerner } 2918bfff6873SLukas Czerner 2919bfff6873SLukas Czerner /* 2920bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29214ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2922bfff6873SLukas Czerner */ 2923bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2924bfff6873SLukas Czerner { 2925bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2926bfff6873SLukas Czerner 2927bfff6873SLukas Czerner if (!elr) 2928bfff6873SLukas Czerner return; 2929bfff6873SLukas Czerner 2930bfff6873SLukas Czerner sbi = elr->lr_sbi; 2931bfff6873SLukas Czerner 2932bfff6873SLukas Czerner list_del(&elr->lr_request); 2933bfff6873SLukas Czerner sbi->s_li_request = NULL; 2934bfff6873SLukas Czerner kfree(elr); 2935bfff6873SLukas Czerner } 2936bfff6873SLukas Czerner 2937bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2938bfff6873SLukas Czerner { 29391bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29401bb933fbSLukas Czerner if (!ext4_li_info) { 29411bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2942bfff6873SLukas Czerner return; 29431bb933fbSLukas Czerner } 2944bfff6873SLukas Czerner 2945bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29461bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2947bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29481bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2949bfff6873SLukas Czerner } 2950bfff6873SLukas Czerner 29518f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29528f1f7453SEric Sandeen 2953bfff6873SLukas Czerner /* 2954bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2955bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2956bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2957bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2958bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2959bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2960bfff6873SLukas Czerner * next waking time and put itself into sleep. 2961bfff6873SLukas Czerner */ 2962bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2963bfff6873SLukas Czerner { 2964bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2965bfff6873SLukas Czerner struct list_head *pos, *n; 2966bfff6873SLukas Czerner struct ext4_li_request *elr; 29674ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2968bfff6873SLukas Czerner 2969bfff6873SLukas Czerner BUG_ON(NULL == eli); 2970bfff6873SLukas Czerner 2971bfff6873SLukas Czerner cont_thread: 2972bfff6873SLukas Czerner while (true) { 2973bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2974bfff6873SLukas Czerner 2975bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2976bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2977bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2978bfff6873SLukas Czerner goto exit_thread; 2979bfff6873SLukas Czerner } 2980bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2981e22834f0SDmitry Monakhov int err = 0; 2982e22834f0SDmitry Monakhov int progress = 0; 2983bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2984bfff6873SLukas Czerner lr_request); 2985bfff6873SLukas Czerner 2986e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 2987e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 2988e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 2989e22834f0SDmitry Monakhov continue; 2990e22834f0SDmitry Monakhov } 2991e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 2992e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 2993e22834f0SDmitry Monakhov progress = 1; 2994e22834f0SDmitry Monakhov /* 2995e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 2996e22834f0SDmitry Monakhov * be removed from the list, it is 2997e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 2998e22834f0SDmitry Monakhov */ 2999e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3000e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3001e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3002e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3003e22834f0SDmitry Monakhov n = pos->next; 3004e22834f0SDmitry Monakhov } 3005e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3006e22834f0SDmitry Monakhov } 3007b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3008e22834f0SDmitry Monakhov if (err) { 3009bfff6873SLukas Czerner ext4_remove_li_request(elr); 3010bfff6873SLukas Czerner continue; 3011bfff6873SLukas Czerner } 3012e22834f0SDmitry Monakhov if (!progress) { 3013e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3014e22834f0SDmitry Monakhov (prandom_u32() 3015e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3016b2c78cd0STheodore Ts'o } 3017bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3018bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3019bfff6873SLukas Czerner } 3020bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3021bfff6873SLukas Czerner 3022a0acae0eSTejun Heo try_to_freeze(); 3023bfff6873SLukas Czerner 30244ed5c033SLukas Czerner cur = jiffies; 30254ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3026f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3027bfff6873SLukas Czerner cond_resched(); 3028bfff6873SLukas Czerner continue; 3029bfff6873SLukas Czerner } 3030bfff6873SLukas Czerner 30314ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 30324ed5c033SLukas Czerner 30338f1f7453SEric Sandeen if (kthread_should_stop()) { 30348f1f7453SEric Sandeen ext4_clear_request_list(); 30358f1f7453SEric Sandeen goto exit_thread; 30368f1f7453SEric Sandeen } 3037bfff6873SLukas Czerner } 3038bfff6873SLukas Czerner 3039bfff6873SLukas Czerner exit_thread: 3040bfff6873SLukas Czerner /* 3041bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3042bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3043bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3044bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3045bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3046bfff6873SLukas Czerner * new one. 3047bfff6873SLukas Czerner */ 3048bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3049bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3050bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3051bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3052bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3053bfff6873SLukas Czerner goto cont_thread; 3054bfff6873SLukas Czerner } 3055bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3056bfff6873SLukas Czerner kfree(ext4_li_info); 3057bfff6873SLukas Czerner ext4_li_info = NULL; 3058bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3059bfff6873SLukas Czerner 3060bfff6873SLukas Czerner return 0; 3061bfff6873SLukas Czerner } 3062bfff6873SLukas Czerner 3063bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3064bfff6873SLukas Czerner { 3065bfff6873SLukas Czerner struct list_head *pos, *n; 3066bfff6873SLukas Czerner struct ext4_li_request *elr; 3067bfff6873SLukas Czerner 3068bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3069bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3070bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3071bfff6873SLukas Czerner lr_request); 3072bfff6873SLukas Czerner ext4_remove_li_request(elr); 3073bfff6873SLukas Czerner } 3074bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3075bfff6873SLukas Czerner } 3076bfff6873SLukas Czerner 3077bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3078bfff6873SLukas Czerner { 30798f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30808f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30818f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30828f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3083bfff6873SLukas Czerner ext4_clear_request_list(); 3084bfff6873SLukas Czerner kfree(ext4_li_info); 3085bfff6873SLukas Czerner ext4_li_info = NULL; 308692b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3087bfff6873SLukas Czerner "initialization thread\n", 3088bfff6873SLukas Czerner err); 3089bfff6873SLukas Czerner return err; 3090bfff6873SLukas Czerner } 3091bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3092bfff6873SLukas Czerner return 0; 3093bfff6873SLukas Czerner } 3094bfff6873SLukas Czerner 3095bfff6873SLukas Czerner /* 3096bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3097bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3098bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3099bfff6873SLukas Czerner * groups and return total number of groups. 3100bfff6873SLukas Czerner */ 3101bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3102bfff6873SLukas Czerner { 3103bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3104bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3105bfff6873SLukas Czerner 3106bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3107bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3108bfff6873SLukas Czerner if (!gdp) 3109bfff6873SLukas Czerner continue; 3110bfff6873SLukas Czerner 3111bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3112bfff6873SLukas Czerner break; 3113bfff6873SLukas Czerner } 3114bfff6873SLukas Czerner 3115bfff6873SLukas Czerner return group; 3116bfff6873SLukas Czerner } 3117bfff6873SLukas Czerner 3118bfff6873SLukas Czerner static int ext4_li_info_new(void) 3119bfff6873SLukas Czerner { 3120bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3121bfff6873SLukas Czerner 3122bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3123bfff6873SLukas Czerner if (!eli) 3124bfff6873SLukas Czerner return -ENOMEM; 3125bfff6873SLukas Czerner 3126bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3127bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3128bfff6873SLukas Czerner 3129bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3130bfff6873SLukas Czerner 3131bfff6873SLukas Czerner ext4_li_info = eli; 3132bfff6873SLukas Czerner 3133bfff6873SLukas Czerner return 0; 3134bfff6873SLukas Czerner } 3135bfff6873SLukas Czerner 3136bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3137bfff6873SLukas Czerner ext4_group_t start) 3138bfff6873SLukas Czerner { 3139bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3140bfff6873SLukas Czerner struct ext4_li_request *elr; 3141bfff6873SLukas Czerner 3142bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3143bfff6873SLukas Czerner if (!elr) 3144bfff6873SLukas Czerner return NULL; 3145bfff6873SLukas Czerner 3146bfff6873SLukas Czerner elr->lr_super = sb; 3147bfff6873SLukas Czerner elr->lr_sbi = sbi; 3148bfff6873SLukas Czerner elr->lr_next_group = start; 3149bfff6873SLukas Czerner 3150bfff6873SLukas Czerner /* 3151bfff6873SLukas Czerner * Randomize first schedule time of the request to 3152bfff6873SLukas Czerner * spread the inode table initialization requests 3153bfff6873SLukas Czerner * better. 3154bfff6873SLukas Czerner */ 3155dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3156dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3157bfff6873SLukas Czerner return elr; 3158bfff6873SLukas Czerner } 3159bfff6873SLukas Czerner 31607f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3161bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3162bfff6873SLukas Czerner { 3163bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31647f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 316549598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 31666c5a6cb9SAndrew Morton int ret = 0; 3167bfff6873SLukas Czerner 31687f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 316951ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 317051ce6511SLukas Czerner /* 317151ce6511SLukas Czerner * Reset timeout so it can be computed again, because 317251ce6511SLukas Czerner * s_li_wait_mult might have changed. 317351ce6511SLukas Czerner */ 317451ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31757f511862STheodore Ts'o goto out; 317651ce6511SLukas Czerner } 3177bfff6873SLukas Czerner 3178bc98a42cSDavid Howells if (first_not_zeroed == ngroups || sb_rdonly(sb) || 317955ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31807f511862STheodore Ts'o goto out; 3181bfff6873SLukas Czerner 3182bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31837f511862STheodore Ts'o if (!elr) { 31847f511862STheodore Ts'o ret = -ENOMEM; 31857f511862STheodore Ts'o goto out; 31867f511862STheodore Ts'o } 3187bfff6873SLukas Czerner 3188bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3189bfff6873SLukas Czerner ret = ext4_li_info_new(); 3190bfff6873SLukas Czerner if (ret) 3191bfff6873SLukas Czerner goto out; 3192bfff6873SLukas Czerner } 3193bfff6873SLukas Czerner 3194bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3195bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3196bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3197bfff6873SLukas Czerner 3198bfff6873SLukas Czerner sbi->s_li_request = elr; 319946e4690bSTao Ma /* 320046e4690bSTao Ma * set elr to NULL here since it has been inserted to 320146e4690bSTao Ma * the request_list and the removal and free of it is 320246e4690bSTao Ma * handled by ext4_clear_request_list from now on. 320346e4690bSTao Ma */ 320446e4690bSTao Ma elr = NULL; 3205bfff6873SLukas Czerner 3206bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3207bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3208bfff6873SLukas Czerner if (ret) 3209bfff6873SLukas Czerner goto out; 3210bfff6873SLukas Czerner } 3211bfff6873SLukas Czerner out: 3212bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3213beed5ecbSNicolas Kaiser if (ret) 3214bfff6873SLukas Czerner kfree(elr); 3215bfff6873SLukas Czerner return ret; 3216bfff6873SLukas Czerner } 3217bfff6873SLukas Czerner 3218bfff6873SLukas Czerner /* 3219bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3220bfff6873SLukas Czerner * module unload. 3221bfff6873SLukas Czerner */ 3222bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3223bfff6873SLukas Czerner { 3224bfff6873SLukas Czerner /* 3225bfff6873SLukas Czerner * If thread exited earlier 3226bfff6873SLukas Czerner * there's nothing to be done. 3227bfff6873SLukas Czerner */ 32288f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3229bfff6873SLukas Czerner return; 3230bfff6873SLukas Czerner 32318f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3232bfff6873SLukas Czerner } 3233bfff6873SLukas Czerner 323425ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 323525ed6e8aSDarrick J. Wong { 323625ed6e8aSDarrick J. Wong int ret = 1; 323725ed6e8aSDarrick J. Wong int compat, incompat; 323825ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 323925ed6e8aSDarrick J. Wong 32409aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3241db9ee220SDarrick J. Wong /* journal checksum v3 */ 324225ed6e8aSDarrick J. Wong compat = 0; 3243db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 324425ed6e8aSDarrick J. Wong } else { 324525ed6e8aSDarrick J. Wong /* journal checksum v1 */ 324625ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 324725ed6e8aSDarrick J. Wong incompat = 0; 324825ed6e8aSDarrick J. Wong } 324925ed6e8aSDarrick J. Wong 3250feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3251feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3252feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3253feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 325425ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 325525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 325625ed6e8aSDarrick J. Wong compat, 0, 325725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 325825ed6e8aSDarrick J. Wong incompat); 325925ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 326025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 326125ed6e8aSDarrick J. Wong compat, 0, 326225ed6e8aSDarrick J. Wong incompat); 326325ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 326425ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 326525ed6e8aSDarrick J. Wong } else { 3266feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3267feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 326825ed6e8aSDarrick J. Wong } 326925ed6e8aSDarrick J. Wong 327025ed6e8aSDarrick J. Wong return ret; 327125ed6e8aSDarrick J. Wong } 327225ed6e8aSDarrick J. Wong 3273952fc18eSTheodore Ts'o /* 3274952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3275952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3276952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3277952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3278952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3279952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3280952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3281952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3282952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3283952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3284952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3285952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3286952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3287952fc18eSTheodore Ts'o */ 3288952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3289952fc18eSTheodore Ts'o char *buf) 3290952fc18eSTheodore Ts'o { 3291952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3292952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3293952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3294952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3295952fc18eSTheodore Ts'o int s, j, count = 0; 3296952fc18eSTheodore Ts'o 3297e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 32980548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32990548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 33000548bbb8STheodore Ts'o 3301952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3302952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3303952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3304952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3305952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3306952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3307952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3308952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3309952fc18eSTheodore Ts'o count++; 3310952fc18eSTheodore Ts'o } 3311952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3312952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3313952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3314952fc18eSTheodore Ts'o count++; 3315952fc18eSTheodore Ts'o } 3316952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3317952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3318952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3319952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3320952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3321952fc18eSTheodore Ts'o count++; 3322952fc18eSTheodore Ts'o } 3323952fc18eSTheodore Ts'o if (i != grp) 3324952fc18eSTheodore Ts'o continue; 3325952fc18eSTheodore Ts'o s = 0; 3326952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3327952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3328952fc18eSTheodore Ts'o count++; 3329952fc18eSTheodore Ts'o } 3330c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3331c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3332c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3333c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3334c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3335952fc18eSTheodore Ts'o } 3336c48ae41bSTheodore Ts'o count += j; 3337c48ae41bSTheodore Ts'o for (; j > 0; j--) 3338c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3339952fc18eSTheodore Ts'o } 3340952fc18eSTheodore Ts'o if (!count) 3341952fc18eSTheodore Ts'o return 0; 3342952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3343952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3344952fc18eSTheodore Ts'o } 3345952fc18eSTheodore Ts'o 3346952fc18eSTheodore Ts'o /* 3347952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3348952fc18eSTheodore Ts'o */ 3349952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3350952fc18eSTheodore Ts'o { 3351952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3352952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 33533c816dedSEric Whitney struct inode *j_inode; 33543c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3355952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3356952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 33574fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3358952fc18eSTheodore Ts'o 3359952fc18eSTheodore Ts'o if (!buf) 3360952fc18eSTheodore Ts'o return -ENOMEM; 3361952fc18eSTheodore Ts'o 3362952fc18eSTheodore Ts'o /* 3363952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3364952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3365952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3366952fc18eSTheodore Ts'o */ 3367952fc18eSTheodore Ts'o 3368952fc18eSTheodore Ts'o /* 3369952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3370952fc18eSTheodore Ts'o */ 3371952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3372952fc18eSTheodore Ts'o 3373952fc18eSTheodore Ts'o /* 3374952fc18eSTheodore Ts'o * Add the overhead found in each block group 3375952fc18eSTheodore Ts'o */ 3376952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3377952fc18eSTheodore Ts'o int blks; 3378952fc18eSTheodore Ts'o 3379952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3380952fc18eSTheodore Ts'o overhead += blks; 3381952fc18eSTheodore Ts'o if (blks) 3382952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3383952fc18eSTheodore Ts'o cond_resched(); 3384952fc18eSTheodore Ts'o } 33853c816dedSEric Whitney 33863c816dedSEric Whitney /* 33873c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 33883c816dedSEric Whitney * loaded or not 33893c816dedSEric Whitney */ 3390b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3391810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33923c816dedSEric Whitney else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { 33933c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 33943c816dedSEric Whitney if (j_inode) { 33953c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 33963c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 33973c816dedSEric Whitney iput(j_inode); 33983c816dedSEric Whitney } else { 33993c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 34003c816dedSEric Whitney } 34013c816dedSEric Whitney } 3402952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3403952fc18eSTheodore Ts'o smp_wmb(); 3404952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3405952fc18eSTheodore Ts'o return 0; 3406952fc18eSTheodore Ts'o } 3407952fc18eSTheodore Ts'o 3408b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 340927dd4385SLukas Czerner { 341027dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3411b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 341227dd4385SLukas Czerner 341327dd4385SLukas Czerner /* 341430fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 341530fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 341630fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 341730fac0f7SJan Kara * to keep ext2/3 backward compatibility. 341830fac0f7SJan Kara */ 3419e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3420b5799018STheodore Ts'o return; 342130fac0f7SJan Kara /* 342227dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 342327dd4385SLukas Czerner * This should cover the situations where we can not afford to run 342427dd4385SLukas Czerner * out of space like for example punch hole, or converting 3425556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 342627dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 342727dd4385SLukas Czerner * very rare. 342827dd4385SLukas Czerner */ 3429b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3430b5799018STheodore Ts'o sbi->s_cluster_bits); 343127dd4385SLukas Czerner 343227dd4385SLukas Czerner do_div(resv_clusters, 50); 343327dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 343427dd4385SLukas Czerner 3435b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 343627dd4385SLukas Czerner } 343727dd4385SLukas Czerner 3438617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3439ac27a0ecSDave Kleikamp { 34405e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 3441d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3442ac27a0ecSDave Kleikamp struct buffer_head *bh; 3443617ba13bSMingming Cao struct ext4_super_block *es = NULL; 34445aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3445617ba13bSMingming Cao ext4_fsblk_t block; 3446617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 344770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3448ac27a0ecSDave Kleikamp unsigned long offset = 0; 3449ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3450ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3451ac27a0ecSDave Kleikamp struct inode *root; 34520390131bSFrank Mayhar const char *descr; 3453dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3454281b5995STheodore Ts'o int blocksize, clustersize; 34554ec11028STheodore Ts'o unsigned int db_count; 34564ec11028STheodore Ts'o unsigned int i; 3457281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3458bd81d8eeSLaurent Vivier __u64 blocks_count; 345907aa2ea1SLukas Czerner int err = 0; 3460b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3461bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3462ac27a0ecSDave Kleikamp 34635aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 34645aee0f8aSTheodore Ts'o goto out_free_base; 3465705895b6SPekka Enberg 3466aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 3467705895b6SPekka Enberg sbi->s_blockgroup_lock = 3468705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 34695aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 34705aee0f8aSTheodore Ts'o goto out_free_base; 34715aee0f8aSTheodore Ts'o 3472ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34732c0544b2STheodore Ts'o sbi->s_sb = sb; 3474240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3475d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3476f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3477f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3478f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3479ac27a0ecSDave Kleikamp 34809f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3481ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 34829f6200bbSTheodore Ts'o 348307aa2ea1SLukas Czerner /* -EINVAL is default */ 3484dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3485617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3486ac27a0ecSDave Kleikamp if (!blocksize) { 3487b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3488ac27a0ecSDave Kleikamp goto out_fail; 3489ac27a0ecSDave Kleikamp } 3490ac27a0ecSDave Kleikamp 3491ac27a0ecSDave Kleikamp /* 3492617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3493ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3494ac27a0ecSDave Kleikamp */ 3495617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 349670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 349770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3498ac27a0ecSDave Kleikamp } else { 349970bbb3e0SAndrew Morton logical_sb_block = sb_block; 3500ac27a0ecSDave Kleikamp } 3501ac27a0ecSDave Kleikamp 3502a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3503b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3504ac27a0ecSDave Kleikamp goto out_fail; 3505ac27a0ecSDave Kleikamp } 3506ac27a0ecSDave Kleikamp /* 3507ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3508617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3509ac27a0ecSDave Kleikamp */ 35102716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3511ac27a0ecSDave Kleikamp sbi->s_es = es; 3512ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3513617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3514617ba13bSMingming Cao goto cantfind_ext4; 3515afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3516ac27a0ecSDave Kleikamp 3517feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3518e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3519e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3520363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3521feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3522feb0ab32SDarrick J. Wong 3523d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3524d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3525d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3526d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3527d25425f8SDarrick J. Wong silent = 1; 3528d25425f8SDarrick J. Wong goto cantfind_ext4; 3529d25425f8SDarrick J. Wong } 3530d25425f8SDarrick J. Wong 35310441984aSDarrick J. Wong /* Load the checksum driver */ 35320441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35330441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35340441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35350441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35360441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35370441984aSDarrick J. Wong goto failed_mount; 35380441984aSDarrick J. Wong } 35390441984aSDarrick J. Wong 3540a9c47317SDarrick J. Wong /* Check superblock checksum */ 3541a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3542a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3543a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3544a9c47317SDarrick J. Wong silent = 1; 35456a797d27SDarrick J. Wong ret = -EFSBADCRC; 3546a9c47317SDarrick J. Wong goto cantfind_ext4; 3547a9c47317SDarrick J. Wong } 3548a9c47317SDarrick J. Wong 3549a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3550e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 35518c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 3552dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 3553a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3554a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3555a9c47317SDarrick J. Wong 3556ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3557ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3558fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3559617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3560fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 356187f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3562fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3563617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3564fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3565ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3566fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 356703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3568fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35692e7842b8SHugh Dickins #endif 357098c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 357198c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 357298c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 357398c1a759SDarrick J. Wong 3574617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3575fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3576617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3577fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3578617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3579fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3580ac27a0ecSDave Kleikamp 3581617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3582fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3583bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3584fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3585bb4f397aSAneesh Kumar K.V else 3586fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 358745f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3588fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35898b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3590fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3591ac27a0ecSDave Kleikamp 359208cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 359308cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 359430773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 359530773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 359630773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3597ac27a0ecSDave Kleikamp 35988b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3599fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3600ac27a0ecSDave Kleikamp 36011e2462f9SMingming Cao /* 3602dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3603dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3604dd919b98SAneesh Kumar K.V */ 3605bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 36068b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3607fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3608dd919b98SAneesh Kumar K.V 360951ce6511SLukas Czerner /* 361051ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 361151ce6511SLukas Czerner * no mount option specified. 361251ce6511SLukas Czerner */ 361351ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 361451ce6511SLukas Czerner 36155aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 36165aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 36175aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 36185aee0f8aSTheodore Ts'o GFP_KERNEL); 36195aee0f8aSTheodore Ts'o if (!s_mount_opts) 36205aee0f8aSTheodore Ts'o goto failed_mount; 36215aee0f8aSTheodore Ts'o if (!parse_options(s_mount_opts, sb, &journal_devnum, 36225aee0f8aSTheodore Ts'o &journal_ioprio, 0)) { 36238b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 36248b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 36255aee0f8aSTheodore Ts'o s_mount_opts); 36265aee0f8aSTheodore Ts'o } 36275aee0f8aSTheodore Ts'o kfree(s_mount_opts); 36288b67f04aSTheodore Ts'o } 36295a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3630b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3631661aa520SEric Sandeen &journal_ioprio, 0)) 3632ac27a0ecSDave Kleikamp goto failed_mount; 3633ac27a0ecSDave Kleikamp 363456889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 363556889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 363656889787STheodore Ts'o "with data=journal disables delayed " 363756889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 363856889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 363956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 364056889787STheodore Ts'o "both data=journal and delalloc"); 364156889787STheodore Ts'o goto failed_mount; 364256889787STheodore Ts'o } 364356889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 364456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 36456ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 364656889787STheodore Ts'o goto failed_mount; 364756889787STheodore Ts'o } 3648923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3649923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3650923ae0ffSRoss Zwisler "both data=journal and dax"); 3651923ae0ffSRoss Zwisler goto failed_mount; 3652923ae0ffSRoss Zwisler } 365373b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 365473b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 365573b92a2aSSergey Karamov "encrypted files will use data=ordered " 365673b92a2aSSergey Karamov "instead of data journaling mode"); 365773b92a2aSSergey Karamov } 365856889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 365956889787STheodore Ts'o clear_opt(sb, DELALLOC); 3660001e4a87STejun Heo } else { 3661001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 366256889787STheodore Ts'o } 366356889787STheodore Ts'o 36641751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 36651751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 3666ac27a0ecSDave Kleikamp 3667617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3668e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3669e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3670e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3671b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3672b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3673b31e1552SEric Sandeen "running e2fsck is recommended"); 3674469108ffSTheodore Tso 3675ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3676ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3677e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3678ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3679ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3680ed3654ebSTheodore Ts'o goto failed_mount; 3681ed3654ebSTheodore Ts'o } 3682dec214d0STahsin Erdogan 3683dec214d0STahsin Erdogan /* 3684dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 3685dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 3686dec214d0STahsin Erdogan */ 3687dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 3688dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 3689dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 3690dec214d0STahsin Erdogan goto failed_mount; 3691dec214d0STahsin Erdogan } 3692ed3654ebSTheodore Ts'o } 3693ed3654ebSTheodore Ts'o 36942035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36952035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36962035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36972035e776STheodore Ts'o "using the ext4 subsystem"); 36982035e776STheodore Ts'o else { 36990d9366d6SEric Sandeen /* 37000d9366d6SEric Sandeen * If we're probing be silent, if this looks like 37010d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 37020d9366d6SEric Sandeen */ 37030d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 37040d9366d6SEric Sandeen goto failed_mount; 37052035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 37062035e776STheodore Ts'o "to feature incompatibilities"); 37072035e776STheodore Ts'o goto failed_mount; 37082035e776STheodore Ts'o } 37092035e776STheodore Ts'o } 37102035e776STheodore Ts'o 37112035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 37122035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 37132035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 37142035e776STheodore Ts'o "using the ext4 subsystem"); 37152035e776STheodore Ts'o else { 37160d9366d6SEric Sandeen /* 37170d9366d6SEric Sandeen * If we're probing be silent, if this looks like 37180d9366d6SEric Sandeen * it's actually an ext4 filesystem. 37190d9366d6SEric Sandeen */ 37200d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 37210d9366d6SEric Sandeen goto failed_mount; 37222035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 37232035e776STheodore Ts'o "to feature incompatibilities"); 37242035e776STheodore Ts'o goto failed_mount; 37252035e776STheodore Ts'o } 37262035e776STheodore Ts'o } 37272035e776STheodore Ts'o 3728469108ffSTheodore Tso /* 3729ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3730ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3731ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3732ac27a0ecSDave Kleikamp */ 3733bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 3734ac27a0ecSDave Kleikamp goto failed_mount; 3735a13fb1a4SEric Sandeen 3736261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3737617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3738617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3739b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 37408cdf3372STheodore Ts'o "Unsupported filesystem blocksize %d (%d log_block_size)", 37418cdf3372STheodore Ts'o blocksize, le32_to_cpu(es->s_log_block_size)); 37428cdf3372STheodore Ts'o goto failed_mount; 37438cdf3372STheodore Ts'o } 37448cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 37458cdf3372STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 37468cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 37478cdf3372STheodore Ts'o "Invalid log block size: %u", 37488cdf3372STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 3749ac27a0ecSDave Kleikamp goto failed_mount; 3750ac27a0ecSDave Kleikamp } 3751ac27a0ecSDave Kleikamp 37525b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 37535b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 37545b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 37555b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 37565b9554dcSTheodore Ts'o goto failed_mount; 37575b9554dcSTheodore Ts'o } 37585b9554dcSTheodore Ts'o 3759923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3760559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 3761559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 3762559db4c6SRoss Zwisler " that may contain inline data"); 376324f3478dSDan Williams sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; 3764559db4c6SRoss Zwisler } 376587eefeb4SToshi Kani err = bdev_dax_supported(sb, blocksize); 376624f3478dSDan Williams if (err) { 376724f3478dSDan Williams ext4_msg(sb, KERN_ERR, 376824f3478dSDan Williams "DAX unsupported by block device. Turning off DAX."); 376924f3478dSDan Williams sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; 377024f3478dSDan Williams } 3771923ae0ffSRoss Zwisler } 3772923ae0ffSRoss Zwisler 3773e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 37746ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 37756ddb2447STheodore Ts'o es->s_encryption_level); 37766ddb2447STheodore Ts'o goto failed_mount; 37776ddb2447STheodore Ts'o } 37786ddb2447STheodore Ts'o 3779ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3780ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3781ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3782b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3783ce40733cSAneesh Kumar K.V blocksize); 3784ac27a0ecSDave Kleikamp goto failed_mount; 3785ac27a0ecSDave Kleikamp } 3786ac27a0ecSDave Kleikamp 3787ac27a0ecSDave Kleikamp brelse(bh); 378870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 378970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3790a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3791ac27a0ecSDave Kleikamp if (!bh) { 3792b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3793b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3794ac27a0ecSDave Kleikamp goto failed_mount; 3795ac27a0ecSDave Kleikamp } 37962716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3797ac27a0ecSDave Kleikamp sbi->s_es = es; 3798617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3799b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3800b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3801ac27a0ecSDave Kleikamp goto failed_mount; 3802ac27a0ecSDave Kleikamp } 3803ac27a0ecSDave Kleikamp } 3804ac27a0ecSDave Kleikamp 3805e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3806f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3807f287a1a5STheodore Ts'o has_huge_files); 3808f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3809ac27a0ecSDave Kleikamp 3810617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3811617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3812617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3813ac27a0ecSDave Kleikamp } else { 3814ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3815ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3816617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 38171330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3818ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3819b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3820b31e1552SEric Sandeen "unsupported inode size: %d", 3821ac27a0ecSDave Kleikamp sbi->s_inode_size); 3822ac27a0ecSDave Kleikamp goto failed_mount; 3823ac27a0ecSDave Kleikamp } 3824ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3825ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3826ac27a0ecSDave Kleikamp } 38270b8e58a1SAndreas Dilger 38280d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3829e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 38308fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 38310d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3832d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3833b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3834b31e1552SEric Sandeen "unsupported descriptor size %lu", 38350d1ee42fSAlexandre Ratchov sbi->s_desc_size); 38360d1ee42fSAlexandre Ratchov goto failed_mount; 38370d1ee42fSAlexandre Ratchov } 38380d1ee42fSAlexandre Ratchov } else 38390d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 38400b8e58a1SAndreas Dilger 3841ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3842ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 38430b8e58a1SAndreas Dilger 3844617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3845ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3846617ba13bSMingming Cao goto cantfind_ext4; 3847cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 3848cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 3849cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 3850cd6bb35bSTheodore Ts'o sbi->s_blocks_per_group); 3851cd6bb35bSTheodore Ts'o goto failed_mount; 3852cd6bb35bSTheodore Ts'o } 3853ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3854ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 38550d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3856ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3857ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3858e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3859e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 38600b8e58a1SAndreas Dilger 3861ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3862ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3863ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3864e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3865f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3866f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3867f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3868f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3869f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3870bc98a42cSDavid Howells if (!sb_rdonly(sb)) 387123301410STheodore Ts'o es->s_flags |= 387223301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3873f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3874f99b2589STheodore Ts'o #else 3875bc98a42cSDavid Howells if (!sb_rdonly(sb)) 387623301410STheodore Ts'o es->s_flags |= 387723301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3878f99b2589STheodore Ts'o #endif 3879f99b2589STheodore Ts'o } 388023301410STheodore Ts'o } 3881ac27a0ecSDave Kleikamp 3882281b5995STheodore Ts'o /* Handle clustersize */ 3883281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3884e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3885281b5995STheodore Ts'o if (has_bigalloc) { 3886281b5995STheodore Ts'o if (clustersize < blocksize) { 3887281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3888281b5995STheodore Ts'o "cluster size (%d) smaller than " 3889281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3890281b5995STheodore Ts'o goto failed_mount; 3891281b5995STheodore Ts'o } 38928cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 38938cdf3372STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 38948cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 38958cdf3372STheodore Ts'o "Invalid log cluster size: %u", 38968cdf3372STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 38978cdf3372STheodore Ts'o goto failed_mount; 38988cdf3372STheodore Ts'o } 3899281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3900281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3901281b5995STheodore Ts'o sbi->s_clusters_per_group = 3902281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3903281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3904281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3905281b5995STheodore Ts'o "#clusters per group too big: %lu", 3906281b5995STheodore Ts'o sbi->s_clusters_per_group); 3907281b5995STheodore Ts'o goto failed_mount; 3908281b5995STheodore Ts'o } 3909281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3910281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3911281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3912281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3913281b5995STheodore Ts'o sbi->s_blocks_per_group, 3914281b5995STheodore Ts'o sbi->s_clusters_per_group); 3915281b5995STheodore Ts'o goto failed_mount; 3916281b5995STheodore Ts'o } 3917281b5995STheodore Ts'o } else { 3918281b5995STheodore Ts'o if (clustersize != blocksize) { 3919281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3920281b5995STheodore Ts'o "block size (%d)", clustersize, 3921281b5995STheodore Ts'o blocksize); 3922281b5995STheodore Ts'o clustersize = blocksize; 3923281b5995STheodore Ts'o } 3924ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3925b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3926b31e1552SEric Sandeen "#blocks per group too big: %lu", 3927ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3928ac27a0ecSDave Kleikamp goto failed_mount; 3929ac27a0ecSDave Kleikamp } 3930281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3931281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3932281b5995STheodore Ts'o } 3933281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3934281b5995STheodore Ts'o 3935960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3936960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3937960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3938960fd856STheodore Ts'o 3939bf43d84bSEric Sandeen /* 3940bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3941bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3942bf43d84bSEric Sandeen */ 39435a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 394430ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 39455a9ae68aSDarrick J. Wong if (err) { 3946b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3947bf43d84bSEric Sandeen " too large to mount safely on this system"); 3948ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 394990c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3950ac27a0ecSDave Kleikamp goto failed_mount; 3951ac27a0ecSDave Kleikamp } 3952ac27a0ecSDave Kleikamp 3953617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3954617ba13bSMingming Cao goto cantfind_ext4; 3955e7c95593SEric Sandeen 39560f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 39570f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 39580f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3959b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3960b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 39610f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 39620f2ddca6SFrom: Thiemo Nagel goto failed_mount; 39630f2ddca6SFrom: Thiemo Nagel } 39640f2ddca6SFrom: Thiemo Nagel 39654ec11028STheodore Ts'o /* 39664ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 39674ec11028STheodore Ts'o * of the filesystem. 39684ec11028STheodore Ts'o */ 39694ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3970b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3971b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3972e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 39734ec11028STheodore Ts'o ext4_blocks_count(es)); 3974e7c95593SEric Sandeen goto failed_mount; 3975e7c95593SEric Sandeen } 3976bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3977bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3978bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3979bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 39804ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3981b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 39824ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3983b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 39844ec11028STheodore Ts'o ext4_blocks_count(es), 39854ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 39864ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 39874ec11028STheodore Ts'o goto failed_mount; 39884ec11028STheodore Ts'o } 3989bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3990fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3991fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3992617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3993617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 39943a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 39952ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 39963a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 39973a4b77cdSEryu Guan "first meta block group too large: %u " 39983a4b77cdSEryu Guan "(group descriptor block count %u)", 39993a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 40003a4b77cdSEryu Guan goto failed_mount; 40013a4b77cdSEryu Guan } 40023a4b77cdSEryu Guan } 4003a7c3e901SMichal Hocko sbi->s_group_desc = kvmalloc(db_count * 4004f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 4005ac27a0ecSDave Kleikamp GFP_KERNEL); 4006ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4007b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 40082cde417dSTheodore Ts'o ret = -ENOMEM; 4009ac27a0ecSDave Kleikamp goto failed_mount; 4010ac27a0ecSDave Kleikamp } 4011ac27a0ecSDave Kleikamp 4012705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4013ac27a0ecSDave Kleikamp 401485c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 401585c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 401685c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 401785c8f176SAndrew Perepechko sb_breadahead(sb, block); 401885c8f176SAndrew Perepechko } 401985c8f176SAndrew Perepechko 4020ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 402170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 4022a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 4023ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 4024b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4025b31e1552SEric Sandeen "can't read group descriptor %d", i); 4026ac27a0ecSDave Kleikamp db_count = i; 4027ac27a0ecSDave Kleikamp goto failed_mount2; 4028ac27a0ecSDave Kleikamp } 4029ac27a0ecSDave Kleikamp } 4030829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4031b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 40326a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4033f9ae9cf5STheodore Ts'o goto failed_mount2; 4034ac27a0ecSDave Kleikamp } 4035772cb7c8SJose R. Santos 4036f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 4037ac27a0ecSDave Kleikamp 4038235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 403904496411STao Ma 4040a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4041eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4042ce7e010aSTheodore Ts'o goto failed_mount3; 4043ce7e010aSTheodore Ts'o 4044c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 404567a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4046c9de560dSAlex Tomas 4047f9ae9cf5STheodore Ts'o /* 4048f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4049f9ae9cf5STheodore Ts'o */ 4050f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4051617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4052617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4053ffcc4182SEric Biggers #ifdef CONFIG_EXT4_FS_ENCRYPTION 4054a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4055ffcc4182SEric Biggers #endif 4056ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4057617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4058e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 40591fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4060262b4662SJan Kara else 4061262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4062689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4063ac27a0ecSDave Kleikamp #endif 406485787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4065f2fa2ffcSAneesh Kumar K.V 4066ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 40673b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4068ac27a0ecSDave Kleikamp 4069ac27a0ecSDave Kleikamp sb->s_root = NULL; 4070ac27a0ecSDave Kleikamp 4071ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 4072e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4073ac27a0ecSDave Kleikamp 4074bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4075c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 407650460fe8SDarrick J. Wong goto failed_mount3a; 4077c5e06d10SJohann Lombardi 4078ac27a0ecSDave Kleikamp /* 4079ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4080ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4081ac27a0ecSDave Kleikamp */ 4082e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 40834753d8a2STheodore Ts'o err = ext4_load_journal(sb, es, journal_devnum); 40844753d8a2STheodore Ts'o if (err) 408550460fe8SDarrick J. Wong goto failed_mount3a; 4086bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4087e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4088b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4089b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4090744692dcSJiaying Zhang goto failed_mount_wq; 4091ac27a0ecSDave Kleikamp } else { 40921e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 40931e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 40941e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 40951e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 40961e381f60SDmitry Monakhov goto failed_mount_wq; 40971e381f60SDmitry Monakhov } 40981e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 40991e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41001e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 41011e381f60SDmitry Monakhov goto failed_mount_wq; 41021e381f60SDmitry Monakhov } 41031e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 41041e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41051e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 41061e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 41071e381f60SDmitry Monakhov goto failed_mount_wq; 41081e381f60SDmitry Monakhov } 41091e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 41101e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 41111e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41121e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 41131e381f60SDmitry Monakhov goto failed_mount_wq; 41141e381f60SDmitry Monakhov } 41151e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 41161e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4117fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 41180390131bSFrank Mayhar sbi->s_journal = NULL; 41190390131bSFrank Mayhar needs_recovery = 0; 41200390131bSFrank Mayhar goto no_journal; 4121ac27a0ecSDave Kleikamp } 4122ac27a0ecSDave Kleikamp 4123e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4124eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4125eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4126b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4127744692dcSJiaying Zhang goto failed_mount_wq; 4128eb40a09cSJose R. Santos } 4129eb40a09cSJose R. Santos 413025ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 413125ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 413225ed6e8aSDarrick J. Wong "feature set"); 413325ed6e8aSDarrick J. Wong goto failed_mount_wq; 4134d4da6c9cSLinus Torvalds } 4135818d276cSGirish Shilamkar 4136ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4137ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4138ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4139ac27a0ecSDave Kleikamp case 0: 4140ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 414163f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 414263f57933SAndrew Morton * cope, else JOURNAL_DATA 414363f57933SAndrew Morton */ 4144dab291afSMingming Cao if (jbd2_journal_check_available_features 414527f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4146fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 414727f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 414827f394a7STyson Nottingham } else { 4149fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 415027f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 415127f394a7STyson Nottingham } 4152ac27a0ecSDave Kleikamp break; 4153ac27a0ecSDave Kleikamp 4154617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4155617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4156dab291afSMingming Cao if (!jbd2_journal_check_available_features 4157dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4158b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4159b31e1552SEric Sandeen "requested data journaling mode"); 4160744692dcSJiaying Zhang goto failed_mount_wq; 4161ac27a0ecSDave Kleikamp } 4162ac27a0ecSDave Kleikamp default: 4163ac27a0ecSDave Kleikamp break; 4164ac27a0ecSDave Kleikamp } 4165ab04df78SJan Kara 4166ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4167ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4168ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4169ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4170ab04df78SJan Kara goto failed_mount_wq; 4171ab04df78SJan Kara } 4172ab04df78SJan Kara 4173b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4174ac27a0ecSDave Kleikamp 417518aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 417618aadd47SBobi Jam 4177ce7e010aSTheodore Ts'o no_journal: 4178cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 417947387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 418047387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4181cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4182cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 41839c191f70ST Makphaibulchoke goto failed_mount_wq; 41849c191f70ST Makphaibulchoke } 41859c191f70ST Makphaibulchoke 4186dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4187dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4188dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4189dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4190dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4191dec214d0STahsin Erdogan goto failed_mount_wq; 4192dec214d0STahsin Erdogan } 4193dec214d0STahsin Erdogan } 4194cdb7ee4cSTahsin Erdogan } 4195dec214d0STahsin Erdogan 4196e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 419709cbfeafSKirill A. Shutemov (blocksize != PAGE_SIZE)) { 41981cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 41991cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 42001cb767cdSTheodore Ts'o goto failed_mount_wq; 42011cb767cdSTheodore Ts'o } 42021cb767cdSTheodore Ts'o 4203bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4204e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4205e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 42066ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 42076ddb2447STheodore Ts'o } 42086ddb2447STheodore Ts'o 4209fd89d5f2STejun Heo /* 4210952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4211952fc18eSTheodore Ts'o * superblock if present. 4212952fc18eSTheodore Ts'o */ 4213952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4214952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4215952fc18eSTheodore Ts'o else { 421607aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 421707aa2ea1SLukas Czerner if (err) 4218952fc18eSTheodore Ts'o goto failed_mount_wq; 4219952fc18eSTheodore Ts'o } 4220952fc18eSTheodore Ts'o 4221952fc18eSTheodore Ts'o /* 4222fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4223fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4224fd89d5f2STejun Heo */ 42252e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 42262e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 42272e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 42282e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 422907aa2ea1SLukas Czerner ret = -ENOMEM; 42302e8fa54eSJan Kara goto failed_mount4; 42312e8fa54eSJan Kara } 42322e8fa54eSJan Kara 4233ac27a0ecSDave Kleikamp /* 4234dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4235ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4236ac27a0ecSDave Kleikamp */ 4237ac27a0ecSDave Kleikamp 42381d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 42391d1fe1eeSDavid Howells if (IS_ERR(root)) { 4240b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 42411d1fe1eeSDavid Howells ret = PTR_ERR(root); 424232a9bb57SManish Katiyar root = NULL; 4243ac27a0ecSDave Kleikamp goto failed_mount4; 4244ac27a0ecSDave Kleikamp } 4245ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4246b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 424794bf608aSAl Viro iput(root); 4248ac27a0ecSDave Kleikamp goto failed_mount4; 4249ac27a0ecSDave Kleikamp } 425048fde701SAl Viro sb->s_root = d_make_root(root); 42511d1fe1eeSDavid Howells if (!sb->s_root) { 4252b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 42531d1fe1eeSDavid Howells ret = -ENOMEM; 42541d1fe1eeSDavid Howells goto failed_mount4; 42551d1fe1eeSDavid Howells } 4256ac27a0ecSDave Kleikamp 4257c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 4258c89128a0SJaegeuk Kim if (ret == -EROFS) { 42591751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 4260c89128a0SJaegeuk Kim ret = 0; 4261c89128a0SJaegeuk Kim } else if (ret) 4262c89128a0SJaegeuk Kim goto failed_mount4a; 4263ef7f3835SKalpak Shah 4264ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4265670e9875STheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE && 4266670e9875STheodore Ts'o sbi->s_want_extra_isize == 0) { 4267ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4268ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4269e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 4270ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4271ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4272ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4273ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4274ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4275ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4276ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4277ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4278ef7f3835SKalpak Shah } 4279ef7f3835SKalpak Shah } 4280ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4281ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4282ef7f3835SKalpak Shah sbi->s_inode_size) { 4283ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4284ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4285b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4286b31e1552SEric Sandeen "available"); 4287ef7f3835SKalpak Shah } 4288ef7f3835SKalpak Shah 4289b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 429027dd4385SLukas Czerner 42916fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 42926fd058f7STheodore Ts'o if (err) { 4293b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4294fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4295f9ae9cf5STheodore Ts'o goto failed_mount4a; 4296f9ae9cf5STheodore Ts'o } 4297f9ae9cf5STheodore Ts'o 4298f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4299f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4300f9ae9cf5STheodore Ts'o if (err) { 4301f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4302f9ae9cf5STheodore Ts'o err); 4303dcf2d804STao Ma goto failed_mount5; 4304c2774d84SAneesh Kumar K.V } 4305c2774d84SAneesh Kumar K.V 4306d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4307d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4308d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4309908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4310908c7f19STejun Heo GFP_KERNEL); 4311d5e03cbbSTheodore Ts'o if (!err) { 4312d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4313d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4314908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4315908c7f19STejun Heo GFP_KERNEL); 4316d5e03cbbSTheodore Ts'o } 4317d5e03cbbSTheodore Ts'o if (!err) 4318d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4319908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4320d5e03cbbSTheodore Ts'o if (!err) 4321908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4322908c7f19STejun Heo GFP_KERNEL); 4323c8585c6fSDaeho Jeong if (!err) 4324c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4325c8585c6fSDaeho Jeong 4326d5e03cbbSTheodore Ts'o if (err) { 4327d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4328d5e03cbbSTheodore Ts'o goto failed_mount6; 4329d5e03cbbSTheodore Ts'o } 4330d5e03cbbSTheodore Ts'o 4331e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4332d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4333d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4334d5e03cbbSTheodore Ts'o "unable to initialize " 4335d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4336d5e03cbbSTheodore Ts'o goto failed_mount6; 4337d5e03cbbSTheodore Ts'o } 4338d5e03cbbSTheodore Ts'o 4339bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4340bfff6873SLukas Czerner if (err) 4341dcf2d804STao Ma goto failed_mount6; 4342bfff6873SLukas Czerner 4343b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4344dcf2d804STao Ma if (err) 4345dcf2d804STao Ma goto failed_mount7; 43463197ebdbSTheodore Ts'o 43479b2ff357SJan Kara #ifdef CONFIG_QUOTA 43489b2ff357SJan Kara /* Enable quota usage during mount. */ 4349bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 43509b2ff357SJan Kara err = ext4_enable_quotas(sb); 43519b2ff357SJan Kara if (err) 43529b2ff357SJan Kara goto failed_mount8; 43539b2ff357SJan Kara } 43549b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 43559b2ff357SJan Kara 4356617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4357617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4358617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 43590390131bSFrank Mayhar if (needs_recovery) { 4360b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4361617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 43620390131bSFrank Mayhar } 43630390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 43640390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 43650390131bSFrank Mayhar descr = " journalled data mode"; 43660390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 43670390131bSFrank Mayhar descr = " ordered data mode"; 43680390131bSFrank Mayhar else 43690390131bSFrank Mayhar descr = " writeback data mode"; 43700390131bSFrank Mayhar } else 43710390131bSFrank Mayhar descr = "out journal"; 43720390131bSFrank Mayhar 437379add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 437479add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 437579add3a3SLukas Czerner if (!blk_queue_discard(q)) 437679add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 437779add3a3SLukas Czerner "mounting with \"discard\" option, but " 437879add3a3SLukas Czerner "the device does not support discard"); 437979add3a3SLukas Czerner } 438079add3a3SLukas Czerner 4381e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4382d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 43835aee0f8aSTheodore Ts'o "Opts: %.*s%s%s", descr, 43845aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 43855aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 43868b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4387ac27a0ecSDave Kleikamp 438866e61a9eSTheodore Ts'o if (es->s_error_count) 438966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4390ac27a0ecSDave Kleikamp 4391efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4392efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4393efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4394efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4395efbed4dcSTheodore Ts'o 4396d4c402d9SCurt Wohlgemuth kfree(orig_data); 4397ac27a0ecSDave Kleikamp return 0; 4398ac27a0ecSDave Kleikamp 4399617ba13bSMingming Cao cantfind_ext4: 4400ac27a0ecSDave Kleikamp if (!silent) 4401b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4402ac27a0ecSDave Kleikamp goto failed_mount; 4403ac27a0ecSDave Kleikamp 440472ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 440572ba7450STheodore Ts'o failed_mount8: 4406ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 440772ba7450STheodore Ts'o #endif 4408dcf2d804STao Ma failed_mount7: 4409dcf2d804STao Ma ext4_unregister_li_request(sb); 4410dcf2d804STao Ma failed_mount6: 4411f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4412d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4413b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4414d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4415d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4416d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4417d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 441800764937SAzat Khuzhin failed_mount5: 4419f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4420f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4421f9ae9cf5STheodore Ts'o failed_mount4a: 442294bf608aSAl Viro dput(sb->s_root); 442332a9bb57SManish Katiyar sb->s_root = NULL; 442494bf608aSAl Viro failed_mount4: 4425b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 44262e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 44272e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 44284c0425ffSMingming Cao failed_mount_wq: 4429dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 4430dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 4431dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 4432dec214d0STahsin Erdogan } 443347387409STahsin Erdogan if (sbi->s_ea_block_cache) { 443447387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 443547387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 443682939d79SJan Kara } 44370390131bSFrank Mayhar if (sbi->s_journal) { 4438dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 443947b4a50bSJan Kara sbi->s_journal = NULL; 44400390131bSFrank Mayhar } 444150460fe8SDarrick J. Wong failed_mount3a: 4442d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4443eb68d0e2SZheng Liu failed_mount3: 44449105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4445c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4446c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4447ac27a0ecSDave Kleikamp failed_mount2: 4448ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4449ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4450b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4451ac27a0ecSDave Kleikamp failed_mount: 44520441984aSDarrick J. Wong if (sbi->s_chksum_driver) 44530441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4454ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4455a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4456ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4457ac27a0ecSDave Kleikamp #endif 4458617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4459ac27a0ecSDave Kleikamp brelse(bh); 4460ac27a0ecSDave Kleikamp out_fail: 4461ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4462f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 44635aee0f8aSTheodore Ts'o out_free_base: 4464ac27a0ecSDave Kleikamp kfree(sbi); 4465d4c402d9SCurt Wohlgemuth kfree(orig_data); 44665e405595SDan Williams fs_put_dax(dax_dev); 446707aa2ea1SLukas Czerner return err ? err : ret; 4468ac27a0ecSDave Kleikamp } 4469ac27a0ecSDave Kleikamp 4470ac27a0ecSDave Kleikamp /* 4471ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4472ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4473ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4474ac27a0ecSDave Kleikamp */ 4475617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4476ac27a0ecSDave Kleikamp { 4477617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4478ac27a0ecSDave Kleikamp 4479ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 448030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 448130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4482ac27a0ecSDave Kleikamp 4483a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4484ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4485dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4486ac27a0ecSDave Kleikamp else 4487dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 44885bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 44895bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 44905bf5683aSHidehiro Kawai else 44915bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4492a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4493ac27a0ecSDave Kleikamp } 4494ac27a0ecSDave Kleikamp 4495c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 4496ac27a0ecSDave Kleikamp unsigned int journal_inum) 4497ac27a0ecSDave Kleikamp { 4498ac27a0ecSDave Kleikamp struct inode *journal_inode; 4499ac27a0ecSDave Kleikamp 4500c6cb7e77SEric Whitney /* 4501c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 4502c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 4503c6cb7e77SEric Whitney * will try to delete it. 4504c6cb7e77SEric Whitney */ 45051d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 45061d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4507b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4508ac27a0ecSDave Kleikamp return NULL; 4509ac27a0ecSDave Kleikamp } 4510ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4511ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4512ac27a0ecSDave Kleikamp iput(journal_inode); 4513b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4514ac27a0ecSDave Kleikamp return NULL; 4515ac27a0ecSDave Kleikamp } 4516ac27a0ecSDave Kleikamp 4517e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4518ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 45191d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4520b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4521ac27a0ecSDave Kleikamp iput(journal_inode); 4522ac27a0ecSDave Kleikamp return NULL; 4523ac27a0ecSDave Kleikamp } 4524c6cb7e77SEric Whitney return journal_inode; 4525c6cb7e77SEric Whitney } 4526c6cb7e77SEric Whitney 4527c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 4528c6cb7e77SEric Whitney unsigned int journal_inum) 4529c6cb7e77SEric Whitney { 4530c6cb7e77SEric Whitney struct inode *journal_inode; 4531c6cb7e77SEric Whitney journal_t *journal; 4532c6cb7e77SEric Whitney 4533c6cb7e77SEric Whitney BUG_ON(!ext4_has_feature_journal(sb)); 4534c6cb7e77SEric Whitney 4535c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 4536c6cb7e77SEric Whitney if (!journal_inode) 4537c6cb7e77SEric Whitney return NULL; 4538ac27a0ecSDave Kleikamp 4539dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4540ac27a0ecSDave Kleikamp if (!journal) { 4541b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4542ac27a0ecSDave Kleikamp iput(journal_inode); 4543ac27a0ecSDave Kleikamp return NULL; 4544ac27a0ecSDave Kleikamp } 4545ac27a0ecSDave Kleikamp journal->j_private = sb; 4546617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4547ac27a0ecSDave Kleikamp return journal; 4548ac27a0ecSDave Kleikamp } 4549ac27a0ecSDave Kleikamp 4550617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4551ac27a0ecSDave Kleikamp dev_t j_dev) 4552ac27a0ecSDave Kleikamp { 4553ac27a0ecSDave Kleikamp struct buffer_head *bh; 4554ac27a0ecSDave Kleikamp journal_t *journal; 4555617ba13bSMingming Cao ext4_fsblk_t start; 4556617ba13bSMingming Cao ext4_fsblk_t len; 4557ac27a0ecSDave Kleikamp int hblock, blocksize; 4558617ba13bSMingming Cao ext4_fsblk_t sb_block; 4559ac27a0ecSDave Kleikamp unsigned long offset; 4560617ba13bSMingming Cao struct ext4_super_block *es; 4561ac27a0ecSDave Kleikamp struct block_device *bdev; 4562ac27a0ecSDave Kleikamp 4563e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 45640390131bSFrank Mayhar 4565b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4566ac27a0ecSDave Kleikamp if (bdev == NULL) 4567ac27a0ecSDave Kleikamp return NULL; 4568ac27a0ecSDave Kleikamp 4569ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4570e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4571ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4572b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4573b31e1552SEric Sandeen "blocksize too small for journal device"); 4574ac27a0ecSDave Kleikamp goto out_bdev; 4575ac27a0ecSDave Kleikamp } 4576ac27a0ecSDave Kleikamp 4577617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4578617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4579ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4580ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4581b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4582b31e1552SEric Sandeen "external journal"); 4583ac27a0ecSDave Kleikamp goto out_bdev; 4584ac27a0ecSDave Kleikamp } 4585ac27a0ecSDave Kleikamp 45862716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4587617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4588ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4589617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4590b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4591b31e1552SEric Sandeen "bad superblock"); 4592ac27a0ecSDave Kleikamp brelse(bh); 4593ac27a0ecSDave Kleikamp goto out_bdev; 4594ac27a0ecSDave Kleikamp } 4595ac27a0ecSDave Kleikamp 4596df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4597df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4598df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4599df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4600df4763beSDarrick J. Wong "corrupt superblock"); 4601df4763beSDarrick J. Wong brelse(bh); 4602df4763beSDarrick J. Wong goto out_bdev; 4603df4763beSDarrick J. Wong } 4604df4763beSDarrick J. Wong 4605617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4606b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4607ac27a0ecSDave Kleikamp brelse(bh); 4608ac27a0ecSDave Kleikamp goto out_bdev; 4609ac27a0ecSDave Kleikamp } 4610ac27a0ecSDave Kleikamp 4611bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4612ac27a0ecSDave Kleikamp start = sb_block + 1; 4613ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4614ac27a0ecSDave Kleikamp 4615dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4616ac27a0ecSDave Kleikamp start, len, blocksize); 4617ac27a0ecSDave Kleikamp if (!journal) { 4618b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4619ac27a0ecSDave Kleikamp goto out_bdev; 4620ac27a0ecSDave Kleikamp } 4621ac27a0ecSDave Kleikamp journal->j_private = sb; 4622dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4623ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4624ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4625b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4626ac27a0ecSDave Kleikamp goto out_journal; 4627ac27a0ecSDave Kleikamp } 4628ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4629b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4630b31e1552SEric Sandeen "user (unsupported) - %d", 4631ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4632ac27a0ecSDave Kleikamp goto out_journal; 4633ac27a0ecSDave Kleikamp } 4634617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4635617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4636ac27a0ecSDave Kleikamp return journal; 46370b8e58a1SAndreas Dilger 4638ac27a0ecSDave Kleikamp out_journal: 4639dab291afSMingming Cao jbd2_journal_destroy(journal); 4640ac27a0ecSDave Kleikamp out_bdev: 4641617ba13bSMingming Cao ext4_blkdev_put(bdev); 4642ac27a0ecSDave Kleikamp return NULL; 4643ac27a0ecSDave Kleikamp } 4644ac27a0ecSDave Kleikamp 4645617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4646617ba13bSMingming Cao struct ext4_super_block *es, 4647ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4648ac27a0ecSDave Kleikamp { 4649ac27a0ecSDave Kleikamp journal_t *journal; 4650ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4651ac27a0ecSDave Kleikamp dev_t journal_dev; 4652ac27a0ecSDave Kleikamp int err = 0; 4653ac27a0ecSDave Kleikamp int really_read_only; 4654ac27a0ecSDave Kleikamp 4655e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 46560390131bSFrank Mayhar 4657ac27a0ecSDave Kleikamp if (journal_devnum && 4658ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4659b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4660b31e1552SEric Sandeen "numbers have changed"); 4661ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4662ac27a0ecSDave Kleikamp } else 4663ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4664ac27a0ecSDave Kleikamp 4665ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4666ac27a0ecSDave Kleikamp 4667ac27a0ecSDave Kleikamp /* 4668ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4669ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4670ac27a0ecSDave Kleikamp * can get read-write access to the device. 4671ac27a0ecSDave Kleikamp */ 4672e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4673bc98a42cSDavid Howells if (sb_rdonly(sb)) { 4674b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4675b31e1552SEric Sandeen "required on readonly filesystem"); 4676ac27a0ecSDave Kleikamp if (really_read_only) { 4677b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4678d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 4679d98bf8cdSSimon Ruderich "(try mounting with noload)"); 4680ac27a0ecSDave Kleikamp return -EROFS; 4681ac27a0ecSDave Kleikamp } 4682b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4683b31e1552SEric Sandeen "be enabled during recovery"); 4684ac27a0ecSDave Kleikamp } 4685ac27a0ecSDave Kleikamp } 4686ac27a0ecSDave Kleikamp 4687ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4688b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4689b31e1552SEric Sandeen "and inode journals!"); 4690ac27a0ecSDave Kleikamp return -EINVAL; 4691ac27a0ecSDave Kleikamp } 4692ac27a0ecSDave Kleikamp 4693ac27a0ecSDave Kleikamp if (journal_inum) { 4694617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4695ac27a0ecSDave Kleikamp return -EINVAL; 4696ac27a0ecSDave Kleikamp } else { 4697617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4698ac27a0ecSDave Kleikamp return -EINVAL; 4699ac27a0ecSDave Kleikamp } 4700ac27a0ecSDave Kleikamp 470190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4702b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 47034776004fSTheodore Ts'o 4704e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4705dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 47061c13d5c0STheodore Ts'o if (!err) { 47071c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 47081c13d5c0STheodore Ts'o if (save) 47091c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 47101c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4711dab291afSMingming Cao err = jbd2_journal_load(journal); 47121c13d5c0STheodore Ts'o if (save) 47131c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 47141c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 47151c13d5c0STheodore Ts'o kfree(save); 47161c13d5c0STheodore Ts'o } 4717ac27a0ecSDave Kleikamp 4718ac27a0ecSDave Kleikamp if (err) { 4719b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4720dab291afSMingming Cao jbd2_journal_destroy(journal); 4721ac27a0ecSDave Kleikamp return err; 4722ac27a0ecSDave Kleikamp } 4723ac27a0ecSDave Kleikamp 4724617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4725617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4726ac27a0ecSDave Kleikamp 4727c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4728ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4729ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4730ac27a0ecSDave Kleikamp 4731ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4732e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4733ac27a0ecSDave Kleikamp } 4734ac27a0ecSDave Kleikamp 4735ac27a0ecSDave Kleikamp return 0; 4736ac27a0ecSDave Kleikamp } 4737ac27a0ecSDave Kleikamp 4738e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4739ac27a0ecSDave Kleikamp { 4740e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4741617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4742c4be0c1dSTakashi Sato int error = 0; 4743ac27a0ecSDave Kleikamp 4744bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4745c4be0c1dSTakashi Sato return error; 474671290b36STheodore Ts'o /* 474771290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 474871290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 474971290b36STheodore Ts'o * write time when we are mounting the root file system 475071290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 475171290b36STheodore Ts'o * for people who are east of GMT and who make their clock 475271290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 475371290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 475471290b36STheodore Ts'o * to complain and force a full file system check. 475571290b36STheodore Ts'o */ 47561751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 4757ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4758f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4759afc32f7eSTheodore Ts'o es->s_kbytes_written = 4760afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4761afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4762afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4763f613dfcbSTheodore Ts'o else 4764f613dfcbSTheodore Ts'o es->s_kbytes_written = 4765f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4766d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 476757042651STheodore Ts'o ext4_free_blocks_count_set(es, 476857042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 476957042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4770d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 47717f93cff9STheodore Ts'o es->s_free_inodes_count = 47727f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 47735d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4774ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 477506db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 47761566a48aSTheodore Ts'o if (sync) 47774743f839SPranay Kr. Srivastava lock_buffer(sbh); 47784743f839SPranay Kr. Srivastava if (buffer_write_io_error(sbh)) { 47794743f839SPranay Kr. Srivastava /* 47804743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 47814743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 47824743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 47834743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 47844743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 47854743f839SPranay Kr. Srivastava * write and hope for the best. 47864743f839SPranay Kr. Srivastava */ 47874743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 47884743f839SPranay Kr. Srivastava "superblock detected"); 47894743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 47904743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 47914743f839SPranay Kr. Srivastava } 4792ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4793914258bfSTheodore Ts'o if (sync) { 47941566a48aSTheodore Ts'o unlock_buffer(sbh); 4795564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 479600473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 4797c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 4798b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4799b31e1552SEric Sandeen "superblock"); 4800914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4801914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4802914258bfSTheodore Ts'o } 4803914258bfSTheodore Ts'o } 4804c4be0c1dSTakashi Sato return error; 4805ac27a0ecSDave Kleikamp } 4806ac27a0ecSDave Kleikamp 4807ac27a0ecSDave Kleikamp /* 4808ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4809ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4810ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4811ac27a0ecSDave Kleikamp */ 4812617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4813617ba13bSMingming Cao struct ext4_super_block *es) 4814ac27a0ecSDave Kleikamp { 4815617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4816ac27a0ecSDave Kleikamp 4817e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 48180390131bSFrank Mayhar BUG_ON(journal != NULL); 48190390131bSFrank Mayhar return; 48200390131bSFrank Mayhar } 4821dab291afSMingming Cao jbd2_journal_lock_updates(journal); 48227ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 48237ffe1ea8SHidehiro Kawai goto out; 48247ffe1ea8SHidehiro Kawai 4825bc98a42cSDavid Howells if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) { 4826e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4827e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4828ac27a0ecSDave Kleikamp } 48297ffe1ea8SHidehiro Kawai 48307ffe1ea8SHidehiro Kawai out: 4831dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4832ac27a0ecSDave Kleikamp } 4833ac27a0ecSDave Kleikamp 4834ac27a0ecSDave Kleikamp /* 4835ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4836ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4837ac27a0ecSDave Kleikamp * main filesystem now. 4838ac27a0ecSDave Kleikamp */ 4839617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4840617ba13bSMingming Cao struct ext4_super_block *es) 4841ac27a0ecSDave Kleikamp { 4842ac27a0ecSDave Kleikamp journal_t *journal; 4843ac27a0ecSDave Kleikamp int j_errno; 4844ac27a0ecSDave Kleikamp const char *errstr; 4845ac27a0ecSDave Kleikamp 4846e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 48470390131bSFrank Mayhar 4848617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4849ac27a0ecSDave Kleikamp 4850ac27a0ecSDave Kleikamp /* 4851ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4852617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4853ac27a0ecSDave Kleikamp */ 4854ac27a0ecSDave Kleikamp 4855dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4856ac27a0ecSDave Kleikamp if (j_errno) { 4857ac27a0ecSDave Kleikamp char nbuf[16]; 4858ac27a0ecSDave Kleikamp 4859617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 486012062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4861ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 486212062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4863ac27a0ecSDave Kleikamp 4864617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4865617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4866e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4867ac27a0ecSDave Kleikamp 4868dab291afSMingming Cao jbd2_journal_clear_err(journal); 4869d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4870ac27a0ecSDave Kleikamp } 4871ac27a0ecSDave Kleikamp } 4872ac27a0ecSDave Kleikamp 4873ac27a0ecSDave Kleikamp /* 4874ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4875ac27a0ecSDave Kleikamp * and wait on the commit. 4876ac27a0ecSDave Kleikamp */ 4877617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4878ac27a0ecSDave Kleikamp { 4879ac27a0ecSDave Kleikamp journal_t *journal; 4880ac27a0ecSDave Kleikamp 4881bc98a42cSDavid Howells if (sb_rdonly(sb)) 4882ac27a0ecSDave Kleikamp return 0; 4883ac27a0ecSDave Kleikamp 4884617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4885b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4886ac27a0ecSDave Kleikamp } 4887ac27a0ecSDave Kleikamp 4888617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4889ac27a0ecSDave Kleikamp { 489014ce0cb4STheodore Ts'o int ret = 0; 48919eddacf9SJan Kara tid_t target; 489206a407f1SDmitry Monakhov bool needs_barrier = false; 48938d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4894ac27a0ecSDave Kleikamp 489549598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 48960db1ff22STheodore Ts'o return 0; 48970db1ff22STheodore Ts'o 48989bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 48992e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4900a1177825SJan Kara /* 4901a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4902a1177825SJan Kara * no dirty dquots 4903a1177825SJan Kara */ 4904a1177825SJan Kara dquot_writeback_dquots(sb, -1); 490506a407f1SDmitry Monakhov /* 490606a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 490706a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 490806a407f1SDmitry Monakhov * transaction_commit will do it for us. 490906a407f1SDmitry Monakhov */ 4910bda32530STheodore Ts'o if (sbi->s_journal) { 491106a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 491206a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 491306a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 491406a407f1SDmitry Monakhov needs_barrier = true; 491506a407f1SDmitry Monakhov 49168d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4917ac27a0ecSDave Kleikamp if (wait) 4918bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4919bda32530STheodore Ts'o target); 49200390131bSFrank Mayhar } 4921bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4922bda32530STheodore Ts'o needs_barrier = true; 492306a407f1SDmitry Monakhov if (needs_barrier) { 492406a407f1SDmitry Monakhov int err; 492506a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 492606a407f1SDmitry Monakhov if (!ret) 492706a407f1SDmitry Monakhov ret = err; 492806a407f1SDmitry Monakhov } 492906a407f1SDmitry Monakhov 493006a407f1SDmitry Monakhov return ret; 493106a407f1SDmitry Monakhov } 493206a407f1SDmitry Monakhov 4933ac27a0ecSDave Kleikamp /* 4934ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4935ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4936be4f27d3SYongqiang Yang * 4937be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 49388e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 49398e8ad8a5SJan Kara * modifications. 4940ac27a0ecSDave Kleikamp */ 4941c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4942ac27a0ecSDave Kleikamp { 4943c4be0c1dSTakashi Sato int error = 0; 4944c4be0c1dSTakashi Sato journal_t *journal; 4945ac27a0ecSDave Kleikamp 4946bc98a42cSDavid Howells if (sb_rdonly(sb)) 49479ca92389STheodore Ts'o return 0; 49489ca92389STheodore Ts'o 4949c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4950ac27a0ecSDave Kleikamp 4951bb044576STheodore Ts'o if (journal) { 4952ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4953dab291afSMingming Cao jbd2_journal_lock_updates(journal); 49547ffe1ea8SHidehiro Kawai 49557ffe1ea8SHidehiro Kawai /* 4956bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4957bb044576STheodore Ts'o * flush the journal. 49587ffe1ea8SHidehiro Kawai */ 4959c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 49606b0310fbSEric Sandeen if (error < 0) 49616b0310fbSEric Sandeen goto out; 4962ac27a0ecSDave Kleikamp 4963ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4964e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4965c642dc9eSEric Sandeen } 4966c642dc9eSEric Sandeen 4967e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 49686b0310fbSEric Sandeen out: 4969bb044576STheodore Ts'o if (journal) 49708e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4971bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 49726b0310fbSEric Sandeen return error; 4973ac27a0ecSDave Kleikamp } 4974ac27a0ecSDave Kleikamp 4975ac27a0ecSDave Kleikamp /* 4976ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4977ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4978ac27a0ecSDave Kleikamp */ 4979c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4980ac27a0ecSDave Kleikamp { 4981bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 49829ca92389STheodore Ts'o return 0; 49839ca92389STheodore Ts'o 4984c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 49859ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4986e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 4987c642dc9eSEric Sandeen } 4988c642dc9eSEric Sandeen 4989e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4990c4be0c1dSTakashi Sato return 0; 4991ac27a0ecSDave Kleikamp } 4992ac27a0ecSDave Kleikamp 4993673c6100STheodore Ts'o /* 4994673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4995673c6100STheodore Ts'o */ 4996673c6100STheodore Ts'o struct ext4_mount_options { 4997673c6100STheodore Ts'o unsigned long s_mount_opt; 4998a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 499908cefc7aSEric W. Biederman kuid_t s_resuid; 500008cefc7aSEric W. Biederman kgid_t s_resgid; 5001673c6100STheodore Ts'o unsigned long s_commit_interval; 5002673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 5003673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 5004673c6100STheodore Ts'o int s_jquota_fmt; 5005a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 5006673c6100STheodore Ts'o #endif 5007673c6100STheodore Ts'o }; 5008673c6100STheodore Ts'o 5009617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 5010ac27a0ecSDave Kleikamp { 5011617ba13bSMingming Cao struct ext4_super_block *es; 5012617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5013ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 5014617ba13bSMingming Cao struct ext4_mount_options old_opts; 5015c79d967dSChristoph Hellwig int enable_quota = 0; 50168a266467STheodore Ts'o ext4_group_t g; 5017b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5018c5e06d10SJohann Lombardi int err = 0; 5019ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 502003dafb5fSChen Gang int i, j; 5021ac27a0ecSDave Kleikamp #endif 5022d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 5023ac27a0ecSDave Kleikamp 5024ac27a0ecSDave Kleikamp /* Store the original options */ 5025ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 5026ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 5027a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 5028ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 5029ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 5030ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 503130773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 503230773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5033ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5034ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5035a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 503603dafb5fSChen Gang if (sbi->s_qf_names[i]) { 503703dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 503803dafb5fSChen Gang GFP_KERNEL); 503903dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 504003dafb5fSChen Gang for (j = 0; j < i; j++) 504103dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 50423e36a163SWei Yongjun kfree(orig_data); 504303dafb5fSChen Gang return -ENOMEM; 504403dafb5fSChen Gang } 504503dafb5fSChen Gang } else 504603dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5047ac27a0ecSDave Kleikamp #endif 5048b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5049b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 5050ac27a0ecSDave Kleikamp 5051661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 5052ac27a0ecSDave Kleikamp err = -EINVAL; 5053ac27a0ecSDave Kleikamp goto restore_opts; 5054ac27a0ecSDave Kleikamp } 5055ac27a0ecSDave Kleikamp 50566b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 50576b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 50586b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 50592d5b86e0SEric Sandeen "during remount not supported; ignoring"); 50602d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5061c6d3d56dSDarrick J. Wong } 5062c6d3d56dSDarrick J. Wong 50636ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 50646ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 50656ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 50666ae6514bSPiotr Sarna "both data=journal and delalloc"); 50676ae6514bSPiotr Sarna err = -EINVAL; 50686ae6514bSPiotr Sarna goto restore_opts; 50696ae6514bSPiotr Sarna } 50706ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 50716ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 50726ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 50736ae6514bSPiotr Sarna err = -EINVAL; 50746ae6514bSPiotr Sarna goto restore_opts; 50756ae6514bSPiotr Sarna } 5076923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 5077923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 5078923ae0ffSRoss Zwisler "both data=journal and dax"); 5079923ae0ffSRoss Zwisler err = -EINVAL; 5080923ae0ffSRoss Zwisler goto restore_opts; 5081923ae0ffSRoss Zwisler } 5082ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5083ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5084ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5085ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5086ab04df78SJan Kara err = -EINVAL; 5087ab04df78SJan Kara goto restore_opts; 5088ab04df78SJan Kara } 5089923ae0ffSRoss Zwisler } 5090923ae0ffSRoss Zwisler 5091cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5092cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5093cdb7ee4cSTahsin Erdogan err = -EINVAL; 5094cdb7ee4cSTahsin Erdogan goto restore_opts; 5095cdb7ee4cSTahsin Erdogan } 5096cdb7ee4cSTahsin Erdogan 5097923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 5098923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 5099923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 5100923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 51016ae6514bSPiotr Sarna } 51026ae6514bSPiotr Sarna 51034ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 5104c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 5105ac27a0ecSDave Kleikamp 51061751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 51071751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5108ac27a0ecSDave Kleikamp 5109ac27a0ecSDave Kleikamp es = sbi->s_es; 5110ac27a0ecSDave Kleikamp 5111b3881f74STheodore Ts'o if (sbi->s_journal) { 5112617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5113b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 5114b3881f74STheodore Ts'o } 5115ac27a0ecSDave Kleikamp 51161751e8a6SLinus Torvalds if (*flags & SB_LAZYTIME) 51171751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 5118a2fd66d0STheodore Ts'o 51191751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 51204ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 5121ac27a0ecSDave Kleikamp err = -EROFS; 5122ac27a0ecSDave Kleikamp goto restore_opts; 5123ac27a0ecSDave Kleikamp } 5124ac27a0ecSDave Kleikamp 51251751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 512638c03b34STheodore Ts'o err = sync_filesystem(sb); 512738c03b34STheodore Ts'o if (err < 0) 512838c03b34STheodore Ts'o goto restore_opts; 51290f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 51300f0dd62fSChristoph Hellwig if (err < 0) 5131c79d967dSChristoph Hellwig goto restore_opts; 5132c79d967dSChristoph Hellwig 5133ac27a0ecSDave Kleikamp /* 5134ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 5135ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 5136ac27a0ecSDave Kleikamp */ 51371751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5138ac27a0ecSDave Kleikamp 5139ac27a0ecSDave Kleikamp /* 5140ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 5141ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5142ac27a0ecSDave Kleikamp * mark the partition as valid again. 5143ac27a0ecSDave Kleikamp */ 5144617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5145617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5146ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5147ac27a0ecSDave Kleikamp 5148a63c9eb2STheodore Ts'o if (sbi->s_journal) 5149617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 5150ac27a0ecSDave Kleikamp } else { 5151a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5152e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 51532cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5154ac27a0ecSDave Kleikamp err = -EROFS; 5155ac27a0ecSDave Kleikamp goto restore_opts; 5156ac27a0ecSDave Kleikamp } 5157ead6596bSEric Sandeen /* 51588a266467STheodore Ts'o * Make sure the group descriptor checksums 51590b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 51608a266467STheodore Ts'o */ 51618a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 51628a266467STheodore Ts'o struct ext4_group_desc *gdp = 51638a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 51648a266467STheodore Ts'o 5165feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5166b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5167b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 5168e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 51698a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 51706a797d27SDarrick J. Wong err = -EFSBADCRC; 51718a266467STheodore Ts'o goto restore_opts; 51728a266467STheodore Ts'o } 51738a266467STheodore Ts'o } 51748a266467STheodore Ts'o 51758a266467STheodore Ts'o /* 5176ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5177ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5178ead6596bSEric Sandeen * require a full umount/remount for now. 5179ead6596bSEric Sandeen */ 5180ead6596bSEric Sandeen if (es->s_last_orphan) { 5181b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5182ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5183ead6596bSEric Sandeen "orphan inode list. Please " 5184b31e1552SEric Sandeen "umount/remount instead"); 5185ead6596bSEric Sandeen err = -EINVAL; 5186ead6596bSEric Sandeen goto restore_opts; 5187ead6596bSEric Sandeen } 5188ead6596bSEric Sandeen 5189ac27a0ecSDave Kleikamp /* 5190ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5191ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5192ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5193ac27a0ecSDave Kleikamp * the partition.) 5194ac27a0ecSDave Kleikamp */ 51950390131bSFrank Mayhar if (sbi->s_journal) 5196617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5197ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5198c89128a0SJaegeuk Kim 5199c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 5200c89128a0SJaegeuk Kim if (err) 5201c89128a0SJaegeuk Kim goto restore_opts; 5202c89128a0SJaegeuk Kim 52031751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 5204e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 5205c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5206c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5207c5e06d10SJohann Lombardi err = -EROFS; 5208c5e06d10SJohann Lombardi goto restore_opts; 5209c5e06d10SJohann Lombardi } 5210c79d967dSChristoph Hellwig enable_quota = 1; 5211ac27a0ecSDave Kleikamp } 5212ac27a0ecSDave Kleikamp } 5213bfff6873SLukas Czerner 5214bfff6873SLukas Czerner /* 5215bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5216bfff6873SLukas Czerner * current settings 5217bfff6873SLukas Czerner */ 5218bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 5219bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5220bfff6873SLukas Czerner else { 5221bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5222bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5223bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5224bfff6873SLukas Czerner } 5225bfff6873SLukas Czerner 52266fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5227c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 5228c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 5229c89128a0SJaegeuk Kim if (err) 5230c89128a0SJaegeuk Kim goto restore_opts; 5231c89128a0SJaegeuk Kim } 52320390131bSFrank Mayhar 5233ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5234ac27a0ecSDave Kleikamp /* Release old quota file names */ 5235a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5236ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 52377c319d32SAditya Kali if (enable_quota) { 52387c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 52390f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 5240e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 52417c319d32SAditya Kali err = ext4_enable_quotas(sb); 524207724f98STheodore Ts'o if (err) 52437c319d32SAditya Kali goto restore_opts; 52447c319d32SAditya Kali } 52457c319d32SAditya Kali } 52467c319d32SAditya Kali #endif 5247d4c402d9SCurt Wohlgemuth 52481751e8a6SLinus Torvalds *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME); 5249d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5250d4c402d9SCurt Wohlgemuth kfree(orig_data); 5251ac27a0ecSDave Kleikamp return 0; 52520b8e58a1SAndreas Dilger 5253ac27a0ecSDave Kleikamp restore_opts: 5254ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5255ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5256a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5257ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5258ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5259ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 526030773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 526130773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5262ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5263ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5264a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5265ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5266ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5267ac27a0ecSDave Kleikamp } 5268ac27a0ecSDave Kleikamp #endif 5269d4c402d9SCurt Wohlgemuth kfree(orig_data); 5270ac27a0ecSDave Kleikamp return err; 5271ac27a0ecSDave Kleikamp } 5272ac27a0ecSDave Kleikamp 5273689c958cSLi Xi #ifdef CONFIG_QUOTA 5274689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 5275689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 5276689c958cSLi Xi { 5277689c958cSLi Xi struct kqid qid; 5278689c958cSLi Xi struct dquot *dquot; 5279689c958cSLi Xi u64 limit; 5280689c958cSLi Xi u64 curblock; 5281689c958cSLi Xi 5282689c958cSLi Xi qid = make_kqid_projid(projid); 5283689c958cSLi Xi dquot = dqget(sb, qid); 5284689c958cSLi Xi if (IS_ERR(dquot)) 5285689c958cSLi Xi return PTR_ERR(dquot); 52867b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 5287689c958cSLi Xi 5288689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 5289689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 5290689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 5291689c958cSLi Xi if (limit && buf->f_blocks > limit) { 5292*f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 5293*f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 5294689c958cSLi Xi buf->f_blocks = limit; 5295689c958cSLi Xi buf->f_bfree = buf->f_bavail = 5296689c958cSLi Xi (buf->f_blocks > curblock) ? 5297689c958cSLi Xi (buf->f_blocks - curblock) : 0; 5298689c958cSLi Xi } 5299689c958cSLi Xi 5300689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 5301689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 5302689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 5303689c958cSLi Xi if (limit && buf->f_files > limit) { 5304689c958cSLi Xi buf->f_files = limit; 5305689c958cSLi Xi buf->f_ffree = 5306689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 5307689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 5308689c958cSLi Xi } 5309689c958cSLi Xi 53107b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 5311689c958cSLi Xi dqput(dquot); 5312689c958cSLi Xi return 0; 5313689c958cSLi Xi } 5314689c958cSLi Xi #endif 5315689c958cSLi Xi 5316617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5317ac27a0ecSDave Kleikamp { 5318ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5319617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5320617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 532127dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5322960cc398SPekka Enberg u64 fsid; 5323d02a9391SKazuya Mio s64 bfree; 532427dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5325ac27a0ecSDave Kleikamp 5326952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5327952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5328ac27a0ecSDave Kleikamp 5329617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5330ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5331b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 533257042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 533357042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5334d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 533557042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 533627dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 533727dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 533827dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5339ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5340ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 534152d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5342617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5343960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5344960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5345960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5346960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 53470b8e58a1SAndreas Dilger 5348689c958cSLi Xi #ifdef CONFIG_QUOTA 5349689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5350689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5351689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5352689c958cSLi Xi #endif 5353ac27a0ecSDave Kleikamp return 0; 5354ac27a0ecSDave Kleikamp } 5355ac27a0ecSDave Kleikamp 5356ac27a0ecSDave Kleikamp 5357ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5358ac27a0ecSDave Kleikamp 5359bc8230eeSJan Kara /* 5360bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 5361bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 5362bc8230eeSJan Kara */ 5363ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5364ac27a0ecSDave Kleikamp { 53654c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5366ac27a0ecSDave Kleikamp } 5367ac27a0ecSDave Kleikamp 5368617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5369ac27a0ecSDave Kleikamp { 5370ac27a0ecSDave Kleikamp int ret, err; 5371ac27a0ecSDave Kleikamp handle_t *handle; 5372ac27a0ecSDave Kleikamp struct inode *inode; 5373ac27a0ecSDave Kleikamp 5374ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 53759924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5376617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5377ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5378ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5379ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5380617ba13bSMingming Cao err = ext4_journal_stop(handle); 5381ac27a0ecSDave Kleikamp if (!ret) 5382ac27a0ecSDave Kleikamp ret = err; 5383ac27a0ecSDave Kleikamp return ret; 5384ac27a0ecSDave Kleikamp } 5385ac27a0ecSDave Kleikamp 5386617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5387ac27a0ecSDave Kleikamp { 5388ac27a0ecSDave Kleikamp int ret, err; 5389ac27a0ecSDave Kleikamp handle_t *handle; 5390ac27a0ecSDave Kleikamp 53919924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5392617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5393ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5394ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5395ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5396617ba13bSMingming Cao err = ext4_journal_stop(handle); 5397ac27a0ecSDave Kleikamp if (!ret) 5398ac27a0ecSDave Kleikamp ret = err; 5399ac27a0ecSDave Kleikamp return ret; 5400ac27a0ecSDave Kleikamp } 5401ac27a0ecSDave Kleikamp 5402617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5403ac27a0ecSDave Kleikamp { 5404ac27a0ecSDave Kleikamp int ret, err; 5405ac27a0ecSDave Kleikamp handle_t *handle; 5406ac27a0ecSDave Kleikamp 54079924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5408617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 54099c3013e9SJan Kara if (IS_ERR(handle)) { 54109c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 54119c3013e9SJan Kara dquot_release(dquot); 5412ac27a0ecSDave Kleikamp return PTR_ERR(handle); 54139c3013e9SJan Kara } 5414ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5415617ba13bSMingming Cao err = ext4_journal_stop(handle); 5416ac27a0ecSDave Kleikamp if (!ret) 5417ac27a0ecSDave Kleikamp ret = err; 5418ac27a0ecSDave Kleikamp return ret; 5419ac27a0ecSDave Kleikamp } 5420ac27a0ecSDave Kleikamp 5421617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5422ac27a0ecSDave Kleikamp { 5423262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5424262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5425262b4662SJan Kara 54262c8be6b2SJan Kara /* Are we journaling quotas? */ 5427e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5428262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5429ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5430617ba13bSMingming Cao return ext4_write_dquot(dquot); 5431ac27a0ecSDave Kleikamp } else { 5432ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5433ac27a0ecSDave Kleikamp } 5434ac27a0ecSDave Kleikamp } 5435ac27a0ecSDave Kleikamp 5436617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5437ac27a0ecSDave Kleikamp { 5438ac27a0ecSDave Kleikamp int ret, err; 5439ac27a0ecSDave Kleikamp handle_t *handle; 5440ac27a0ecSDave Kleikamp 5441ac27a0ecSDave Kleikamp /* Data block + inode block */ 54422b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5443ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5444ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5445ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5446617ba13bSMingming Cao err = ext4_journal_stop(handle); 5447ac27a0ecSDave Kleikamp if (!ret) 5448ac27a0ecSDave Kleikamp ret = err; 5449ac27a0ecSDave Kleikamp return ret; 5450ac27a0ecSDave Kleikamp } 5451ac27a0ecSDave Kleikamp 5452ac27a0ecSDave Kleikamp /* 5453ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5454ac27a0ecSDave Kleikamp * the quota file and such... 5455ac27a0ecSDave Kleikamp */ 5456617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5457ac27a0ecSDave Kleikamp { 5458287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5459617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5460ac27a0ecSDave Kleikamp } 5461ac27a0ecSDave Kleikamp 5462daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5463daf647d2STheodore Ts'o { 5464daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5465daf647d2STheodore Ts'o 5466daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5467daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5468daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5469daf647d2STheodore Ts'o * because the name of the lock is set using the 5470daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5471daf647d2STheodore Ts'o */ 5472daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5473daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5474daf647d2STheodore Ts'o } 5475daf647d2STheodore Ts'o 5476ac27a0ecSDave Kleikamp /* 5477ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5478ac27a0ecSDave Kleikamp */ 5479617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 54808c54ca9cSAl Viro const struct path *path) 5481ac27a0ecSDave Kleikamp { 5482ac27a0ecSDave Kleikamp int err; 5483ac27a0ecSDave Kleikamp 5484ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5485ac27a0ecSDave Kleikamp return -EINVAL; 54860623543bSJan Kara 5487ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5488d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5489ac27a0ecSDave Kleikamp return -EXDEV; 54900623543bSJan Kara /* Journaling quota? */ 54910623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 54922b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5493f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5494b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5495b31e1552SEric Sandeen "Quota file not on filesystem root. " 5496b31e1552SEric Sandeen "Journaled quota will not work"); 549791389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 549891389240SJan Kara } else { 549991389240SJan Kara /* 550091389240SJan Kara * Clear the flag just in case mount options changed since 550191389240SJan Kara * last time. 550291389240SJan Kara */ 550391389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 55040623543bSJan Kara } 55050623543bSJan Kara 55060623543bSJan Kara /* 55070623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 55080623543bSJan Kara * all updates to the file when we bypass pagecache... 55090623543bSJan Kara */ 55100390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 55112b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 55120623543bSJan Kara /* 55130623543bSJan Kara * We don't need to lock updates but journal_flush() could 55140623543bSJan Kara * otherwise be livelocked... 55150623543bSJan Kara */ 55160623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 55177ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 55180623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5519f00c9e44SJan Kara if (err) 55207ffe1ea8SHidehiro Kawai return err; 55217ffe1ea8SHidehiro Kawai } 5522957153fcSJan Kara 5523daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5524daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5525957153fcSJan Kara if (err) { 5526daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5527daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5528957153fcSJan Kara } else { 5529957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 5530957153fcSJan Kara handle_t *handle; 5531957153fcSJan Kara 553261a92987SJan Kara /* 553361a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 553461a92987SJan Kara * files. If this fails, we return success anyway since quotas 553561a92987SJan Kara * are already enabled and this is not a hard failure. 553661a92987SJan Kara */ 5537957153fcSJan Kara inode_lock(inode); 5538957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 5539957153fcSJan Kara if (IS_ERR(handle)) 5540957153fcSJan Kara goto unlock_inode; 5541957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 5542957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 5543957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 5544957153fcSJan Kara ext4_mark_inode_dirty(handle, inode); 5545957153fcSJan Kara ext4_journal_stop(handle); 5546957153fcSJan Kara unlock_inode: 5547957153fcSJan Kara inode_unlock(inode); 5548957153fcSJan Kara } 5549daf647d2STheodore Ts'o return err; 5550ac27a0ecSDave Kleikamp } 5551ac27a0ecSDave Kleikamp 55527c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 55537c319d32SAditya Kali unsigned int flags) 55547c319d32SAditya Kali { 55557c319d32SAditya Kali int err; 55567c319d32SAditya Kali struct inode *qf_inode; 5557a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 55587c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5559689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5560689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 55617c319d32SAditya Kali }; 55627c319d32SAditya Kali 5563e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 55647c319d32SAditya Kali 55657c319d32SAditya Kali if (!qf_inums[type]) 55667c319d32SAditya Kali return -EPERM; 55677c319d32SAditya Kali 55687c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 55697c319d32SAditya Kali if (IS_ERR(qf_inode)) { 55707c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 55717c319d32SAditya Kali return PTR_ERR(qf_inode); 55727c319d32SAditya Kali } 55737c319d32SAditya Kali 5574bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5575bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5576daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 55777c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 55787c319d32SAditya Kali iput(qf_inode); 5579daf647d2STheodore Ts'o if (err) 5580daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 55817c319d32SAditya Kali 55827c319d32SAditya Kali return err; 55837c319d32SAditya Kali } 55847c319d32SAditya Kali 55857c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 55867c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 55877c319d32SAditya Kali { 55887c319d32SAditya Kali int type, err = 0; 5589a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 55907c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5591689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5592689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 55937c319d32SAditya Kali }; 559449da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 559549da9392SJan Kara test_opt(sb, USRQUOTA), 559649da9392SJan Kara test_opt(sb, GRPQUOTA), 559749da9392SJan Kara test_opt(sb, PRJQUOTA), 559849da9392SJan Kara }; 55997c319d32SAditya Kali 560091389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 5601a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 56027c319d32SAditya Kali if (qf_inums[type]) { 56037c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 560449da9392SJan Kara DQUOT_USAGE_ENABLED | 560549da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 56067c319d32SAditya Kali if (err) { 560795f1fda4Szhangyi (F) for (type--; type >= 0; type--) 560895f1fda4Szhangyi (F) dquot_quota_off(sb, type); 560995f1fda4Szhangyi (F) 56107c319d32SAditya Kali ext4_warning(sb, 561172ba7450STheodore Ts'o "Failed to enable quota tracking " 561272ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 561372ba7450STheodore Ts'o "e2fsck to fix.", type, err); 56147c319d32SAditya Kali return err; 56157c319d32SAditya Kali } 56167c319d32SAditya Kali } 56177c319d32SAditya Kali } 56187c319d32SAditya Kali return 0; 56197c319d32SAditya Kali } 56207c319d32SAditya Kali 5621ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5622ca0e05e4SDmitry Monakhov { 562321f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 562421f97697SJan Kara handle_t *handle; 5625957153fcSJan Kara int err; 562621f97697SJan Kara 562787009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 562887009d86SDmitry Monakhov * Caller already holds s_umount sem */ 562987009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5630ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5631ca0e05e4SDmitry Monakhov 5632957153fcSJan Kara if (!inode || !igrab(inode)) 56330b268590SAmir Goldstein goto out; 56340b268590SAmir Goldstein 5635957153fcSJan Kara err = dquot_quota_off(sb, type); 5636964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 5637957153fcSJan Kara goto out_put; 5638957153fcSJan Kara 5639957153fcSJan Kara inode_lock(inode); 564061a92987SJan Kara /* 564161a92987SJan Kara * Update modification times of quota files when userspace can 564261a92987SJan Kara * start looking at them. If we fail, we return success anyway since 564361a92987SJan Kara * this is not a hard failure and quotas are already disabled. 564461a92987SJan Kara */ 56459924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 564621f97697SJan Kara if (IS_ERR(handle)) 5647957153fcSJan Kara goto out_unlock; 5648957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 5649957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 5650eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 565121f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 565221f97697SJan Kara ext4_journal_stop(handle); 5653957153fcSJan Kara out_unlock: 5654957153fcSJan Kara inode_unlock(inode); 5655957153fcSJan Kara out_put: 5656964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 5657957153fcSJan Kara iput(inode); 5658957153fcSJan Kara return err; 565921f97697SJan Kara out: 5660ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5661ca0e05e4SDmitry Monakhov } 5662ca0e05e4SDmitry Monakhov 5663ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5664ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5665ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5666ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5667617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5668ac27a0ecSDave Kleikamp size_t len, loff_t off) 5669ac27a0ecSDave Kleikamp { 5670ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5671725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5672ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5673ac27a0ecSDave Kleikamp int tocopy; 5674ac27a0ecSDave Kleikamp size_t toread; 5675ac27a0ecSDave Kleikamp struct buffer_head *bh; 5676ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5677ac27a0ecSDave Kleikamp 5678ac27a0ecSDave Kleikamp if (off > i_size) 5679ac27a0ecSDave Kleikamp return 0; 5680ac27a0ecSDave Kleikamp if (off+len > i_size) 5681ac27a0ecSDave Kleikamp len = i_size-off; 5682ac27a0ecSDave Kleikamp toread = len; 5683ac27a0ecSDave Kleikamp while (toread > 0) { 5684ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5685ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 56861c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 56871c215028STheodore Ts'o if (IS_ERR(bh)) 56881c215028STheodore Ts'o return PTR_ERR(bh); 5689ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5690ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5691ac27a0ecSDave Kleikamp else 5692ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5693ac27a0ecSDave Kleikamp brelse(bh); 5694ac27a0ecSDave Kleikamp offset = 0; 5695ac27a0ecSDave Kleikamp toread -= tocopy; 5696ac27a0ecSDave Kleikamp data += tocopy; 5697ac27a0ecSDave Kleikamp blk++; 5698ac27a0ecSDave Kleikamp } 5699ac27a0ecSDave Kleikamp return len; 5700ac27a0ecSDave Kleikamp } 5701ac27a0ecSDave Kleikamp 5702ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5703ac27a0ecSDave Kleikamp * enough credits) */ 5704617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5705ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5706ac27a0ecSDave Kleikamp { 5707ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5708725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 57091c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5710c5e298aeSTheodore Ts'o int retries = 0; 5711ac27a0ecSDave Kleikamp struct buffer_head *bh; 5712ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5713ac27a0ecSDave Kleikamp 57140390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5715b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5716b31e1552SEric Sandeen " cancelled because transaction is not started", 57179c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 57189c3013e9SJan Kara return -EIO; 57199c3013e9SJan Kara } 572067eeb568SDmitry Monakhov /* 572167eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 572267eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 572367eeb568SDmitry Monakhov */ 572467eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 572567eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 572667eeb568SDmitry Monakhov " cancelled because not block aligned", 572767eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 572867eeb568SDmitry Monakhov return -EIO; 572967eeb568SDmitry Monakhov } 573067eeb568SDmitry Monakhov 5731c5e298aeSTheodore Ts'o do { 5732c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5733c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5734c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5735c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5736c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 57371c215028STheodore Ts'o if (IS_ERR(bh)) 57381c215028STheodore Ts'o return PTR_ERR(bh); 5739ac27a0ecSDave Kleikamp if (!bh) 5740ac27a0ecSDave Kleikamp goto out; 57415d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5742617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5743ac27a0ecSDave Kleikamp if (err) { 5744ac27a0ecSDave Kleikamp brelse(bh); 57451c215028STheodore Ts'o return err; 5746ac27a0ecSDave Kleikamp } 5747ac27a0ecSDave Kleikamp lock_buffer(bh); 574867eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5749ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5750ac27a0ecSDave Kleikamp unlock_buffer(bh); 57510390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5752ac27a0ecSDave Kleikamp brelse(bh); 5753ac27a0ecSDave Kleikamp out: 575467eeb568SDmitry Monakhov if (inode->i_size < off + len) { 575567eeb568SDmitry Monakhov i_size_write(inode, off + len); 5756617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5757617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 575821f97697SJan Kara } 575967eeb568SDmitry Monakhov return len; 5760ac27a0ecSDave Kleikamp } 5761ac27a0ecSDave Kleikamp 57628f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) 57638f0e8746STheodore Ts'o { 57648f0e8746STheodore Ts'o const struct quota_format_ops *ops; 57658f0e8746STheodore Ts'o 57668f0e8746STheodore Ts'o if (!sb_has_quota_loaded(sb, qid->type)) 57678f0e8746STheodore Ts'o return -ESRCH; 57688f0e8746STheodore Ts'o ops = sb_dqopt(sb)->ops[qid->type]; 57698f0e8746STheodore Ts'o if (!ops || !ops->get_next_id) 57708f0e8746STheodore Ts'o return -ENOSYS; 57718f0e8746STheodore Ts'o return dquot_get_next_id(sb, qid); 57728f0e8746STheodore Ts'o } 5773ac27a0ecSDave Kleikamp #endif 5774ac27a0ecSDave Kleikamp 5775152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5776152a0836SAl Viro const char *dev_name, void *data) 5777ac27a0ecSDave Kleikamp { 5778152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5779ac27a0ecSDave Kleikamp } 5780ac27a0ecSDave Kleikamp 5781c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 578224b58424STheodore Ts'o static inline void register_as_ext2(void) 578324b58424STheodore Ts'o { 578424b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 578524b58424STheodore Ts'o if (err) 578624b58424STheodore Ts'o printk(KERN_WARNING 578724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 578824b58424STheodore Ts'o } 578924b58424STheodore Ts'o 579024b58424STheodore Ts'o static inline void unregister_as_ext2(void) 579124b58424STheodore Ts'o { 579224b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 579324b58424STheodore Ts'o } 57942035e776STheodore Ts'o 57952035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 57962035e776STheodore Ts'o { 5797e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 57982035e776STheodore Ts'o return 0; 5799bc98a42cSDavid Howells if (sb_rdonly(sb)) 58002035e776STheodore Ts'o return 1; 5801e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 58022035e776STheodore Ts'o return 0; 58032035e776STheodore Ts'o return 1; 58042035e776STheodore Ts'o } 580524b58424STheodore Ts'o #else 580624b58424STheodore Ts'o static inline void register_as_ext2(void) { } 580724b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 58082035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 580924b58424STheodore Ts'o #endif 581024b58424STheodore Ts'o 581124b58424STheodore Ts'o static inline void register_as_ext3(void) 581224b58424STheodore Ts'o { 581324b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 581424b58424STheodore Ts'o if (err) 581524b58424STheodore Ts'o printk(KERN_WARNING 581624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 581724b58424STheodore Ts'o } 581824b58424STheodore Ts'o 581924b58424STheodore Ts'o static inline void unregister_as_ext3(void) 582024b58424STheodore Ts'o { 582124b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 582224b58424STheodore Ts'o } 58232035e776STheodore Ts'o 58242035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 58252035e776STheodore Ts'o { 5826e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 58272035e776STheodore Ts'o return 0; 5828e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 58292035e776STheodore Ts'o return 0; 5830bc98a42cSDavid Howells if (sb_rdonly(sb)) 58312035e776STheodore Ts'o return 1; 5832e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 58332035e776STheodore Ts'o return 0; 58342035e776STheodore Ts'o return 1; 58352035e776STheodore Ts'o } 583624b58424STheodore Ts'o 583703010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5838ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 583903010a33STheodore Ts'o .name = "ext4", 5840152a0836SAl Viro .mount = ext4_mount, 5841ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5842ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5843ac27a0ecSDave Kleikamp }; 58447f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5845ac27a0ecSDave Kleikamp 5846e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5847e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5848e9e3bcecSEric Sandeen 58495dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5850ac27a0ecSDave Kleikamp { 5851e9e3bcecSEric Sandeen int i, err; 5852c9de560dSAlex Tomas 5853e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 585407c0c5d8SAl Viro ext4_li_info = NULL; 585507c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 585607c0c5d8SAl Viro 58579a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 585812e9b892SDmitry Monakhov ext4_check_flag_values(); 5859e9e3bcecSEric Sandeen 5860e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 5861e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5862e9e3bcecSEric Sandeen 586351865fdaSZheng Liu err = ext4_init_es(); 58646fd058f7STheodore Ts'o if (err) 58656fd058f7STheodore Ts'o return err; 586651865fdaSZheng Liu 586751865fdaSZheng Liu err = ext4_init_pageio(); 586851865fdaSZheng Liu if (err) 5869b5799018STheodore Ts'o goto out5; 587051865fdaSZheng Liu 58715dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5872bd2d0210STheodore Ts'o if (err) 5873b5799018STheodore Ts'o goto out4; 5874857ac889SLukas Czerner 5875b5799018STheodore Ts'o err = ext4_init_sysfs(); 5876dd68314cSTheodore Ts'o if (err) 5877b5799018STheodore Ts'o goto out3; 5878857ac889SLukas Czerner 58795dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5880ac27a0ecSDave Kleikamp if (err) 5881c9de560dSAlex Tomas goto out2; 5882ac27a0ecSDave Kleikamp err = init_inodecache(); 5883ac27a0ecSDave Kleikamp if (err) 5884ac27a0ecSDave Kleikamp goto out1; 588524b58424STheodore Ts'o register_as_ext3(); 58862035e776STheodore Ts'o register_as_ext2(); 588703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5888ac27a0ecSDave Kleikamp if (err) 5889ac27a0ecSDave Kleikamp goto out; 5890bfff6873SLukas Czerner 5891ac27a0ecSDave Kleikamp return 0; 5892ac27a0ecSDave Kleikamp out: 589324b58424STheodore Ts'o unregister_as_ext2(); 589424b58424STheodore Ts'o unregister_as_ext3(); 5895ac27a0ecSDave Kleikamp destroy_inodecache(); 5896ac27a0ecSDave Kleikamp out1: 58975dabfc78STheodore Ts'o ext4_exit_mballoc(); 58989c191f70ST Makphaibulchoke out2: 5899b5799018STheodore Ts'o ext4_exit_sysfs(); 5900b5799018STheodore Ts'o out3: 5901dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5902b5799018STheodore Ts'o out4: 59035dabfc78STheodore Ts'o ext4_exit_pageio(); 5904b5799018STheodore Ts'o out5: 590551865fdaSZheng Liu ext4_exit_es(); 590651865fdaSZheng Liu 5907ac27a0ecSDave Kleikamp return err; 5908ac27a0ecSDave Kleikamp } 5909ac27a0ecSDave Kleikamp 59105dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5911ac27a0ecSDave Kleikamp { 5912bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 591324b58424STheodore Ts'o unregister_as_ext2(); 591424b58424STheodore Ts'o unregister_as_ext3(); 591503010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5916ac27a0ecSDave Kleikamp destroy_inodecache(); 59175dabfc78STheodore Ts'o ext4_exit_mballoc(); 5918b5799018STheodore Ts'o ext4_exit_sysfs(); 59195dabfc78STheodore Ts'o ext4_exit_system_zone(); 59205dabfc78STheodore Ts'o ext4_exit_pageio(); 5921dd12ed14SEric Sandeen ext4_exit_es(); 5922ac27a0ecSDave Kleikamp } 5923ac27a0ecSDave Kleikamp 5924ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 592583982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5926ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 59277ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 59285dabfc78STheodore Ts'o module_init(ext4_init_fs) 59295dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5930