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 766617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 767ac27a0ecSDave Kleikamp { 768617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 769ac27a0ecSDave Kleikamp 770617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 771ac27a0ecSDave Kleikamp return; 772ac27a0ecSDave Kleikamp 77312062dddSEric Sandeen ext4_warning(sb, 774ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 775ac27a0ecSDave Kleikamp "running e2fsck is recommended", 776617ba13bSMingming Cao EXT4_DYNAMIC_REV); 777ac27a0ecSDave Kleikamp 778617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 779617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 780617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 781ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 782ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 783ac27a0ecSDave Kleikamp 784ac27a0ecSDave Kleikamp /* 785ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 786ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 787ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 788ac27a0ecSDave Kleikamp */ 789ac27a0ecSDave Kleikamp } 790ac27a0ecSDave Kleikamp 791ac27a0ecSDave Kleikamp /* 792ac27a0ecSDave Kleikamp * Open the external journal device 793ac27a0ecSDave Kleikamp */ 794b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 795ac27a0ecSDave Kleikamp { 796ac27a0ecSDave Kleikamp struct block_device *bdev; 797ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 798ac27a0ecSDave Kleikamp 799d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 800ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 801ac27a0ecSDave Kleikamp goto fail; 802ac27a0ecSDave Kleikamp return bdev; 803ac27a0ecSDave Kleikamp 804ac27a0ecSDave Kleikamp fail: 805b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 806ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 807ac27a0ecSDave Kleikamp return NULL; 808ac27a0ecSDave Kleikamp } 809ac27a0ecSDave Kleikamp 810ac27a0ecSDave Kleikamp /* 811ac27a0ecSDave Kleikamp * Release the journal device 812ac27a0ecSDave Kleikamp */ 8134385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 814ac27a0ecSDave Kleikamp { 8154385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 816ac27a0ecSDave Kleikamp } 817ac27a0ecSDave Kleikamp 8184385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 819ac27a0ecSDave Kleikamp { 820ac27a0ecSDave Kleikamp struct block_device *bdev; 821ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 822ac27a0ecSDave Kleikamp if (bdev) { 8234385bab1SAl Viro ext4_blkdev_put(bdev); 824ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 825ac27a0ecSDave Kleikamp } 826ac27a0ecSDave Kleikamp } 827ac27a0ecSDave Kleikamp 828ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 829ac27a0ecSDave Kleikamp { 830617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 831ac27a0ecSDave Kleikamp } 832ac27a0ecSDave Kleikamp 833617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 834ac27a0ecSDave Kleikamp { 835ac27a0ecSDave Kleikamp struct list_head *l; 836ac27a0ecSDave Kleikamp 837b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 838ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 839ac27a0ecSDave Kleikamp 840ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 841ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 842ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 843ac27a0ecSDave Kleikamp printk(KERN_ERR " " 844ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 845ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 846ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 847ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 848ac27a0ecSDave Kleikamp } 849ac27a0ecSDave Kleikamp } 850ac27a0ecSDave Kleikamp 851957153fcSJan Kara #ifdef CONFIG_QUOTA 852957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 853957153fcSJan Kara 854957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 855957153fcSJan Kara { 856957153fcSJan Kara int type; 857957153fcSJan Kara 858957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 859957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 860957153fcSJan Kara ext4_quota_off(sb, type); 861957153fcSJan Kara } 862957153fcSJan Kara #else 863957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 864957153fcSJan Kara { 865957153fcSJan Kara } 866957153fcSJan Kara #endif 867957153fcSJan Kara 868617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 869ac27a0ecSDave Kleikamp { 870617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 871617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 87297abd7d4STheodore Ts'o int aborted = 0; 873ef2cabf7SHidehiro Kawai int i, err; 874ac27a0ecSDave Kleikamp 875857ac889SLukas Czerner ext4_unregister_li_request(sb); 876957153fcSJan Kara ext4_quota_off_umount(sb); 877e0ccfd95SChristoph Hellwig 8782e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 8794c0425ffSMingming Cao 8800390131bSFrank Mayhar if (sbi->s_journal) { 88197abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 882ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 88347b4a50bSJan Kara sbi->s_journal = NULL; 88497abd7d4STheodore Ts'o if ((err < 0) && !aborted) 885c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8860390131bSFrank Mayhar } 887d4edac31SJosef Bacik 888ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 889d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 8909105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 891d4edac31SJosef Bacik ext4_release_system_zone(sb); 892d4edac31SJosef Bacik ext4_mb_release(sb); 893d4edac31SJosef Bacik ext4_ext_release(sb); 894d4edac31SJosef Bacik 895bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 896e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 897ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 898ac27a0ecSDave Kleikamp } 899bc98a42cSDavid Howells if (!sb_rdonly(sb)) 900a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 901a8e25a83SArtem Bityutskiy 902ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 903ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 904b93b41d4SAl Viro kvfree(sbi->s_group_desc); 905b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 90657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 907ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 908ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 90957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 910c8585c6fSDaeho Jeong percpu_free_rwsem(&sbi->s_journal_flag_rwsem); 911ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 912a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 913ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 914ac27a0ecSDave Kleikamp #endif 915ac27a0ecSDave Kleikamp 916ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 917ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 918ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 919ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 920ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 921ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 922ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 923ac27a0ecSDave Kleikamp 92489d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 925f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 926ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 927ac27a0ecSDave Kleikamp /* 928ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 929ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 930ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 931ac27a0ecSDave Kleikamp */ 932ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 933f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 934617ba13bSMingming Cao ext4_blkdev_remove(sbi); 935ac27a0ecSDave Kleikamp } 936dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 937dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 938dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 939dec214d0STahsin Erdogan } 94047387409STahsin Erdogan if (sbi->s_ea_block_cache) { 94147387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 94247387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 9439c191f70ST Makphaibulchoke } 944c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 945c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 9469060dd2cSEric Sandeen brelse(sbi->s_sbh); 947ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9483197ebdbSTheodore Ts'o /* 9493197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9503197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9513197ebdbSTheodore Ts'o */ 9523197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9533197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9540441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9550441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 956705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 9575e405595SDan Williams fs_put_dax(sbi->s_daxdev); 958ac27a0ecSDave Kleikamp kfree(sbi); 959ac27a0ecSDave Kleikamp } 960ac27a0ecSDave Kleikamp 961e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 962ac27a0ecSDave Kleikamp 963ac27a0ecSDave Kleikamp /* 964ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 965ac27a0ecSDave Kleikamp */ 966617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 967ac27a0ecSDave Kleikamp { 968617ba13bSMingming Cao struct ext4_inode_info *ei; 969ac27a0ecSDave Kleikamp 970e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 971ac27a0ecSDave Kleikamp if (!ei) 972ac27a0ecSDave Kleikamp return NULL; 9730b8e58a1SAndreas Dilger 974ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 975202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 976c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 977c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 9789a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 9799a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 980edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 981eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 982edaa53caSZheng Liu ei->i_es_shk_nr = 0; 983dd475925SJan Kara ei->i_es_shrink_lblk = 0; 984d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 9859d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 9867e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 987d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 988a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 989a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 99096c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 991a9e7f447SDmitry Monakhov #endif 9928aefcd55STheodore Ts'o ei->jinode = NULL; 9932e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 994744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 995b436b9beSJan Kara ei->i_sync_tid = 0; 996b436b9beSJan Kara ei->i_datasync_tid = 0; 997e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9982e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 999ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1000ac27a0ecSDave Kleikamp } 1001ac27a0ecSDave Kleikamp 10027ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 10037ff9c073STheodore Ts'o { 10047ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 10057ff9c073STheodore Ts'o 10067ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 10077ff9c073STheodore Ts'o return drop; 10087ff9c073STheodore Ts'o } 10097ff9c073STheodore Ts'o 1010fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 1011fa0d7e3dSNick Piggin { 1012fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 1013fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1014fa0d7e3dSNick Piggin } 1015fa0d7e3dSNick Piggin 1016617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1017ac27a0ecSDave Kleikamp { 10189f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1019b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1020b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1021b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 10229f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 10239f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 10249f7dd93dSVasily Averin true); 10259f7dd93dSVasily Averin dump_stack(); 10269f7dd93dSVasily Averin } 1027fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1028ac27a0ecSDave Kleikamp } 1029ac27a0ecSDave Kleikamp 103051cc5068SAlexey Dobriyan static void init_once(void *foo) 1031ac27a0ecSDave Kleikamp { 1032617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1033ac27a0ecSDave Kleikamp 1034ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1035ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 10360e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1037ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1038ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1039ac27a0ecSDave Kleikamp } 1040ac27a0ecSDave Kleikamp 1041e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1042ac27a0ecSDave Kleikamp { 1043f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1044f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1045f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1046f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1047f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1048f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 104920c2df83SPaul Mundt init_once); 1050617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1051ac27a0ecSDave Kleikamp return -ENOMEM; 1052ac27a0ecSDave Kleikamp return 0; 1053ac27a0ecSDave Kleikamp } 1054ac27a0ecSDave Kleikamp 1055ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1056ac27a0ecSDave Kleikamp { 10578c0a8537SKirill A. Shutemov /* 10588c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 10598c0a8537SKirill A. Shutemov * destroy cache. 10608c0a8537SKirill A. Shutemov */ 10618c0a8537SKirill A. Shutemov rcu_barrier(); 1062617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1063ac27a0ecSDave Kleikamp } 1064ac27a0ecSDave Kleikamp 10650930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1066ac27a0ecSDave Kleikamp { 10670930fcc1SAl Viro invalidate_inode_buffers(inode); 1068dbd5768fSJan Kara clear_inode(inode); 10699f754758SChristoph Hellwig dquot_drop(inode); 1070c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 107151865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 10728aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10738aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10748aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10758aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10768aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10778aefcd55STheodore Ts'o } 10783d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1079ac27a0ecSDave Kleikamp } 1080ac27a0ecSDave Kleikamp 10811b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10821b961ac0SChristoph Hellwig u64 ino, u32 generation) 1083ac27a0ecSDave Kleikamp { 1084ac27a0ecSDave Kleikamp struct inode *inode; 1085ac27a0ecSDave Kleikamp 1086617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1087ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1088617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1089ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1090ac27a0ecSDave Kleikamp 1091ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1092ac27a0ecSDave Kleikamp * 1093617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1094ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1095ac27a0ecSDave Kleikamp * 1096ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1097ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1098ac27a0ecSDave Kleikamp */ 1099f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 11001d1fe1eeSDavid Howells if (IS_ERR(inode)) 11011d1fe1eeSDavid Howells return ERR_CAST(inode); 11021d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1103ac27a0ecSDave Kleikamp iput(inode); 1104ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1105ac27a0ecSDave Kleikamp } 11061b961ac0SChristoph Hellwig 11071b961ac0SChristoph Hellwig return inode; 1108ac27a0ecSDave Kleikamp } 11091b961ac0SChristoph Hellwig 11101b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11111b961ac0SChristoph Hellwig int fh_len, int fh_type) 11121b961ac0SChristoph Hellwig { 11131b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11141b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11151b961ac0SChristoph Hellwig } 11161b961ac0SChristoph Hellwig 11171b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11181b961ac0SChristoph Hellwig int fh_len, int fh_type) 11191b961ac0SChristoph Hellwig { 11201b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11211b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1122ac27a0ecSDave Kleikamp } 1123ac27a0ecSDave Kleikamp 1124c39a7f84SToshiyuki Okajima /* 1125c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1126c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1127c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1128c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1129c39a7f84SToshiyuki Okajima */ 11300b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11310b8e58a1SAndreas Dilger gfp_t wait) 1132c39a7f84SToshiyuki Okajima { 1133c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1134c39a7f84SToshiyuki Okajima 1135c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1136c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1137c39a7f84SToshiyuki Okajima return 0; 1138c39a7f84SToshiyuki Okajima if (journal) 1139c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1140d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1141c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1142c39a7f84SToshiyuki Okajima } 1143c39a7f84SToshiyuki Okajima 1144a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 1145a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1146a7550b30SJaegeuk Kim { 1147a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1148a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1149a7550b30SJaegeuk Kim } 1150a7550b30SJaegeuk Kim 1151a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1152a7550b30SJaegeuk Kim void *fs_data) 1153a7550b30SJaegeuk Kim { 11542f8f5e76SEric Biggers handle_t *handle = fs_data; 1155c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1156a7550b30SJaegeuk Kim 11579ce0151aSEric Biggers /* 11589ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 11599ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 11609ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 11619ce0151aSEric Biggers * the filename "lost+found" itself. 11629ce0151aSEric Biggers */ 11639ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 11649ce0151aSEric Biggers return -EPERM; 1165a7550b30SJaegeuk Kim 11667d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 11677d3e06a8SRoss Zwisler return -EINVAL; 11687d3e06a8SRoss Zwisler 116994840e3cSEric Biggers res = ext4_convert_inline_data(inode); 117094840e3cSEric Biggers if (res) 117194840e3cSEric Biggers return res; 117294840e3cSEric Biggers 11732f8f5e76SEric Biggers /* 11742f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 11752f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 11762f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 11772f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 11782f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 11792f8f5e76SEric Biggers */ 11802f8f5e76SEric Biggers 11812f8f5e76SEric Biggers if (handle) { 11822f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 11832f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 11842f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 11852f8f5e76SEric Biggers ctx, len, 0); 1186a7550b30SJaegeuk Kim if (!res) { 1187a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1188a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1189a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1190a3caa24bSJan Kara /* 11912ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 11922ee6a576SEric Biggers * S_DAX may be disabled 1193a3caa24bSJan Kara */ 1194a3caa24bSJan Kara ext4_set_inode_flags(inode); 1195a7550b30SJaegeuk Kim } 1196a7550b30SJaegeuk Kim return res; 1197a7550b30SJaegeuk Kim } 1198a7550b30SJaegeuk Kim 1199b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1200b8cb5a54STahsin Erdogan if (res) 1201b8cb5a54STahsin Erdogan return res; 12022f8f5e76SEric Biggers retry: 1203af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1204af65207cSTahsin Erdogan &credits); 1205dec214d0STahsin Erdogan if (res) 1206dec214d0STahsin Erdogan return res; 1207dec214d0STahsin Erdogan 1208c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1209a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1210a7550b30SJaegeuk Kim return PTR_ERR(handle); 1211a7550b30SJaegeuk Kim 12122f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 12132f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12142f8f5e76SEric Biggers ctx, len, 0); 1215a7550b30SJaegeuk Kim if (!res) { 1216a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 12172ee6a576SEric Biggers /* 12182ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 12192ee6a576SEric Biggers * S_DAX may be disabled 12202ee6a576SEric Biggers */ 1221a3caa24bSJan Kara ext4_set_inode_flags(inode); 1222a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1223a7550b30SJaegeuk Kim if (res) 1224a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1225a7550b30SJaegeuk Kim } 1226a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 12272f8f5e76SEric Biggers 12282f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 12292f8f5e76SEric Biggers goto retry; 1230a7550b30SJaegeuk Kim if (!res) 1231a7550b30SJaegeuk Kim res = res2; 1232a7550b30SJaegeuk Kim return res; 1233a7550b30SJaegeuk Kim } 1234a7550b30SJaegeuk Kim 1235c250b7ddSEric Biggers static bool ext4_dummy_context(struct inode *inode) 1236a7550b30SJaegeuk Kim { 1237a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1238a7550b30SJaegeuk Kim } 1239a7550b30SJaegeuk Kim 1240a7550b30SJaegeuk Kim static unsigned ext4_max_namelen(struct inode *inode) 1241a7550b30SJaegeuk Kim { 1242a7550b30SJaegeuk Kim return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : 1243a7550b30SJaegeuk Kim EXT4_NAME_LEN; 1244a7550b30SJaegeuk Kim } 1245a7550b30SJaegeuk Kim 12466f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1247a5d431efSEric Biggers .key_prefix = "ext4:", 1248a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1249a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1250a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1251a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1252a7550b30SJaegeuk Kim .max_namelen = ext4_max_namelen, 1253a7550b30SJaegeuk Kim }; 1254a7550b30SJaegeuk Kim #endif 1255a7550b30SJaegeuk Kim 1256ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1257d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1258689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1259ac27a0ecSDave Kleikamp 1260617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1261617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1262617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1263617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1264617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 12656f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 12668c54ca9cSAl Viro const struct path *path); 1267617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1268617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1269ac27a0ecSDave Kleikamp size_t len, loff_t off); 1270617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1271ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 12727c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 12737c319d32SAditya Kali unsigned int flags); 12747c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 12758f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); 1276ac27a0ecSDave Kleikamp 127796c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 127896c7e0d9SJan Kara { 127996c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 128096c7e0d9SJan Kara } 128196c7e0d9SJan Kara 128261e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 128360e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1284617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1285617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1286617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1287617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1288a5b5ee32SJan Kara .write_info = ext4_write_info, 1289a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1290a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1291040cb378SLi Xi .get_projid = ext4_get_projid, 12927a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 12938f0e8746STheodore Ts'o .get_next_id = ext4_get_next_id, 1294ac27a0ecSDave Kleikamp }; 1295ac27a0ecSDave Kleikamp 12960d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1297617ba13bSMingming Cao .quota_on = ext4_quota_on, 1298ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1299287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 13000a240339SJan Kara .get_state = dquot_get_state, 1301287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1302287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 13036332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 13046332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1305ac27a0ecSDave Kleikamp }; 1306ac27a0ecSDave Kleikamp #endif 1307ac27a0ecSDave Kleikamp 1308ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1309617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1310617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1311617ba13bSMingming Cao .write_inode = ext4_write_inode, 1312617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 13137ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 13140930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1315617ba13bSMingming Cao .put_super = ext4_put_super, 1316617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1317c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1318c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1319617ba13bSMingming Cao .statfs = ext4_statfs, 1320617ba13bSMingming Cao .remount_fs = ext4_remount, 1321617ba13bSMingming Cao .show_options = ext4_show_options, 1322ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1323617ba13bSMingming Cao .quota_read = ext4_quota_read, 1324617ba13bSMingming Cao .quota_write = ext4_quota_write, 132596c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1326ac27a0ecSDave Kleikamp #endif 1327c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1328ac27a0ecSDave Kleikamp }; 1329ac27a0ecSDave Kleikamp 133039655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 13311b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 13321b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1333617ba13bSMingming Cao .get_parent = ext4_get_parent, 1334ac27a0ecSDave Kleikamp }; 1335ac27a0ecSDave Kleikamp 1336ac27a0ecSDave Kleikamp enum { 1337ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1338ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 133972578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1340ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 134172578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1342ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1343ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1344ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 13456ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1346ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13475a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1348ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 134949da9392SJan Kara Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, 13501449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1351670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 13521449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 13535328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1354744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1355fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1356cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 1357ac27a0ecSDave Kleikamp }; 1358ac27a0ecSDave Kleikamp 1359a447c093SSteven Whitehouse static const match_table_t tokens = { 1360ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1361ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1362ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1363ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1364ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1365ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1366ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1367ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1368ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1369ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1370ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1371ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1372ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1373ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 137472578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 137572578c33STheodore Ts'o {Opt_removed, "orlov"}, 1376ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1377ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1378ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1379ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1380e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 13815a916be1STheodore Ts'o {Opt_noload, "noload"}, 138272578c33STheodore Ts'o {Opt_removed, "nobh"}, 138372578c33STheodore Ts'o {Opt_removed, "bh"}, 1384ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 138530773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 138630773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1387ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1388ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1389818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1390c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1391818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1392ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1393ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1394ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1395ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13965bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13975bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1398ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1399ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1400ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1401ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1402ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1403ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 14045a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1405ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1406ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1407ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1408ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 140949da9392SJan Kara {Opt_prjquota, "prjquota"}, 1410ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 141106705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 141206705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 141325ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1414923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1415c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 141664769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1417a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1418a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1419670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1420dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 142136ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 142236ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 14236fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 14246fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1425240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1426b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1427afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 142806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 142906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1430744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1431744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 14325328e635SEric Sandeen {Opt_discard, "discard"}, 14335328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1434fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1435fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1436fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1437df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 14386ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1439cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1440cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 1441c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1442c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1443c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1444c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1445c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1446f3f12faaSJosef Bacik {Opt_err, NULL}, 1447ac27a0ecSDave Kleikamp }; 1448ac27a0ecSDave Kleikamp 1449617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1450ac27a0ecSDave Kleikamp { 1451617ba13bSMingming Cao ext4_fsblk_t sb_block; 1452ac27a0ecSDave Kleikamp char *options = (char *) *data; 1453ac27a0ecSDave Kleikamp 1454ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1455ac27a0ecSDave Kleikamp return 1; /* Default location */ 14560b8e58a1SAndreas Dilger 1457ac27a0ecSDave Kleikamp options += 3; 14580b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1459ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1460ac27a0ecSDave Kleikamp if (*options && *options != ',') { 14614776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1462ac27a0ecSDave Kleikamp (char *) *data); 1463ac27a0ecSDave Kleikamp return 1; 1464ac27a0ecSDave Kleikamp } 1465ac27a0ecSDave Kleikamp if (*options == ',') 1466ac27a0ecSDave Kleikamp options++; 1467ac27a0ecSDave Kleikamp *data = (void *) options; 14680b8e58a1SAndreas Dilger 1469ac27a0ecSDave Kleikamp return sb_block; 1470ac27a0ecSDave Kleikamp } 1471ac27a0ecSDave Kleikamp 1472b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1473d6006186SEric Biggers static const char deprecated_msg[] = 1474d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1475437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1476b3881f74STheodore Ts'o 147756c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 147856c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 147956c50f11SDmitry Monakhov { 148056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 148156c50f11SDmitry Monakhov char *qname; 148203dafb5fSChen Gang int ret = -1; 148356c50f11SDmitry Monakhov 148456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 148556c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 148656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 148756c50f11SDmitry Monakhov "Cannot change journaled " 148856c50f11SDmitry Monakhov "quota options when quota turned on"); 148957f73c2cSTheodore Ts'o return -1; 149056c50f11SDmitry Monakhov } 1491e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1492c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1493c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1494c325a67cSTheodore Ts'o return 1; 1495262b4662SJan Kara } 149656c50f11SDmitry Monakhov qname = match_strdup(args); 149756c50f11SDmitry Monakhov if (!qname) { 149856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 149956c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 150057f73c2cSTheodore Ts'o return -1; 150156c50f11SDmitry Monakhov } 150203dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 150303dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 150403dafb5fSChen Gang ret = 1; 150503dafb5fSChen Gang else 150656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 150703dafb5fSChen Gang "%s quota file already specified", 150803dafb5fSChen Gang QTYPE2NAME(qtype)); 150903dafb5fSChen Gang goto errout; 151056c50f11SDmitry Monakhov } 151103dafb5fSChen Gang if (strchr(qname, '/')) { 151256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 151356c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 151403dafb5fSChen Gang goto errout; 151556c50f11SDmitry Monakhov } 151603dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1517fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 151856c50f11SDmitry Monakhov return 1; 151903dafb5fSChen Gang errout: 152003dafb5fSChen Gang kfree(qname); 152103dafb5fSChen Gang return ret; 152256c50f11SDmitry Monakhov } 152356c50f11SDmitry Monakhov 152456c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 152556c50f11SDmitry Monakhov { 152656c50f11SDmitry Monakhov 152756c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 152856c50f11SDmitry Monakhov 152956c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 153056c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 153156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 153256c50f11SDmitry Monakhov " when quota turned on"); 153357f73c2cSTheodore Ts'o return -1; 153456c50f11SDmitry Monakhov } 153503dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 153656c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 153756c50f11SDmitry Monakhov return 1; 153856c50f11SDmitry Monakhov } 153956c50f11SDmitry Monakhov #endif 154056c50f11SDmitry Monakhov 154126092bf5STheodore Ts'o #define MOPT_SET 0x0001 154226092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 154326092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 154426092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 154526092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 154626092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 154726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 154826092bf5STheodore Ts'o #define MOPT_Q 0 154926092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 155026092bf5STheodore Ts'o #else 155126092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 155226092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 155326092bf5STheodore Ts'o #endif 155426092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 15558dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 15568dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 15578dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1558ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 155926092bf5STheodore Ts'o 156026092bf5STheodore Ts'o static const struct mount_opts { 156126092bf5STheodore Ts'o int token; 156226092bf5STheodore Ts'o int mount_opt; 156326092bf5STheodore Ts'o int flags; 156426092bf5STheodore Ts'o } ext4_mount_opts[] = { 156526092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 156626092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 156726092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 156826092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 156926092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 157026092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 15718dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 15728dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 15738dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 15748dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 157526092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 157626092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 15778dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 15788dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 15798dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 158059d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1581c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1582c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 15838dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 15841e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 158526092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 15868dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 15871e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 15888dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 158926092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 159026092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 159126092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 15928dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 15937915a861SAles Novak MOPT_NO_EXT2}, 15948dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 15957915a861SAles Novak MOPT_NO_EXT2}, 159626092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 159726092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 159826092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 159926092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 160026092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 160126092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 160226092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 160326092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 160426092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 160526092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1606923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 160726092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 16080efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 16090efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 16105ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16115ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 16125ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16138dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16148dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16158dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 16168dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 161726092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 161826092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 161926092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 162026092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 162126092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 162226092bf5STheodore Ts'o #else 162326092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 162426092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 162526092bf5STheodore Ts'o #endif 162626092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 162726092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1628670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 162926092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 163026092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 163126092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 163226092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 163326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 163449da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 163549da9392SJan Kara MOPT_SET | MOPT_Q}, 163626092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 163749da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 163849da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 163926092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 164026092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 164126092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 164226092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 164326092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 164426092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 164526092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1646df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 16476ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 1648cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 164926092bf5STheodore Ts'o {Opt_err, 0, 0} 165026092bf5STheodore Ts'o }; 165126092bf5STheodore Ts'o 165226092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 165326092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 165426092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 165526092bf5STheodore Ts'o { 165626092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 165726092bf5STheodore Ts'o const struct mount_opts *m; 165808cefc7aSEric W. Biederman kuid_t uid; 165908cefc7aSEric W. Biederman kgid_t gid; 166026092bf5STheodore Ts'o int arg = 0; 166126092bf5STheodore Ts'o 166257f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 166357f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 166457f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 166557f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 166657f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 166757f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 166857f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 166957f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 167057f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 167157f73c2cSTheodore Ts'o #endif 167226092bf5STheodore Ts'o switch (token) { 1673f7048605STheodore Ts'o case Opt_noacl: 1674f7048605STheodore Ts'o case Opt_nouser_xattr: 1675f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1676f7048605STheodore Ts'o break; 167726092bf5STheodore Ts'o case Opt_sb: 167826092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 167926092bf5STheodore Ts'o case Opt_removed: 16805f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 168126092bf5STheodore Ts'o return 1; 168226092bf5STheodore Ts'o case Opt_abort: 168326092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 168426092bf5STheodore Ts'o return 1; 168526092bf5STheodore Ts'o case Opt_i_version: 1686357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 168726092bf5STheodore Ts'o return 1; 1688a26f4992STheodore Ts'o case Opt_lazytime: 16891751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 1690a26f4992STheodore Ts'o return 1; 1691a26f4992STheodore Ts'o case Opt_nolazytime: 16921751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 1693a26f4992STheodore Ts'o return 1; 169426092bf5STheodore Ts'o } 169526092bf5STheodore Ts'o 16965f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 16975f3633e3SJan Kara if (token == m->token) 16985f3633e3SJan Kara break; 16995f3633e3SJan Kara 17005f3633e3SJan Kara if (m->token == Opt_err) { 17015f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 17025f3633e3SJan Kara "or missing value", opt); 17035f3633e3SJan Kara return -1; 17045f3633e3SJan Kara } 17055f3633e3SJan Kara 17068dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 17078dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17088dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 17098dc0aa8cSTheodore Ts'o return -1; 17108dc0aa8cSTheodore Ts'o } 17118dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 17128dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17138dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 17148dc0aa8cSTheodore Ts'o return -1; 17158dc0aa8cSTheodore Ts'o } 17168dc0aa8cSTheodore Ts'o 1717ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 17180efb3b23SJan Kara return -1; 171926092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 172026092bf5STheodore Ts'o return -1; 1721c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1722c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 172326092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 17241e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 17251e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1726c93cf2d7SDmitry Monakhov } else 1727c93cf2d7SDmitry Monakhov return -1; 1728c93cf2d7SDmitry Monakhov } 172926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 173026092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 173126092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 173226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 173326092bf5STheodore Ts'o "options when quota turned on"); 173426092bf5STheodore Ts'o return -1; 173526092bf5STheodore Ts'o } 173626092bf5STheodore Ts'o 173726092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 173826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 173926092bf5STheodore Ts'o } else if (token == Opt_commit) { 174026092bf5STheodore Ts'o if (arg == 0) 174126092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 174226092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 1743670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 1744670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 174526092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 174626092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 174726092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 174826092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 174926092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1750e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1751e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1752e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1753e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 175426092bf5STheodore Ts'o return -1; 175526092bf5STheodore Ts'o } 175626092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 175726092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 175826092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 175926092bf5STheodore Ts'o if (!args->from) 176026092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 176126092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1762df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1763df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 176426092bf5STheodore Ts'o } else if (token == Opt_stripe) { 176526092bf5STheodore Ts'o sbi->s_stripe = arg; 17660efb3b23SJan Kara } else if (token == Opt_resuid) { 17670efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 17680efb3b23SJan Kara if (!uid_valid(uid)) { 17695f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 17700efb3b23SJan Kara return -1; 17710efb3b23SJan Kara } 17720efb3b23SJan Kara sbi->s_resuid = uid; 17730efb3b23SJan Kara } else if (token == Opt_resgid) { 17740efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 17750efb3b23SJan Kara if (!gid_valid(gid)) { 17765f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 17770efb3b23SJan Kara return -1; 17780efb3b23SJan Kara } 17790efb3b23SJan Kara sbi->s_resgid = gid; 17800efb3b23SJan Kara } else if (token == Opt_journal_dev) { 17810efb3b23SJan Kara if (is_remount) { 17820efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 17830efb3b23SJan Kara "Cannot specify journal on remount"); 17840efb3b23SJan Kara return -1; 17850efb3b23SJan Kara } 17860efb3b23SJan Kara *journal_devnum = arg; 1787ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1788ad4eec61SEric Sandeen char *journal_path; 1789ad4eec61SEric Sandeen struct inode *journal_inode; 1790ad4eec61SEric Sandeen struct path path; 1791ad4eec61SEric Sandeen int error; 1792ad4eec61SEric Sandeen 1793ad4eec61SEric Sandeen if (is_remount) { 1794ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1795ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1796ad4eec61SEric Sandeen return -1; 1797ad4eec61SEric Sandeen } 1798ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1799ad4eec61SEric Sandeen if (!journal_path) { 1800ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1801ad4eec61SEric Sandeen "journal device string"); 1802ad4eec61SEric Sandeen return -1; 1803ad4eec61SEric Sandeen } 1804ad4eec61SEric Sandeen 1805ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1806ad4eec61SEric Sandeen if (error) { 1807ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1808ad4eec61SEric Sandeen "journal device path: error %d", error); 1809ad4eec61SEric Sandeen kfree(journal_path); 1810ad4eec61SEric Sandeen return -1; 1811ad4eec61SEric Sandeen } 1812ad4eec61SEric Sandeen 18132b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1814ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1815ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1816ad4eec61SEric Sandeen "is not a block device", journal_path); 1817ad4eec61SEric Sandeen path_put(&path); 1818ad4eec61SEric Sandeen kfree(journal_path); 1819ad4eec61SEric Sandeen return -1; 1820ad4eec61SEric Sandeen } 1821ad4eec61SEric Sandeen 1822ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1823ad4eec61SEric Sandeen path_put(&path); 1824ad4eec61SEric Sandeen kfree(journal_path); 18250efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 18260efb3b23SJan Kara if (arg > 7) { 18275f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 18280efb3b23SJan Kara " (must be 0-7)"); 18290efb3b23SJan Kara return -1; 18300efb3b23SJan Kara } 18310efb3b23SJan Kara *journal_ioprio = 18320efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 18336ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 18346ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 18356ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 18366ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18376ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 18386ddb2447STheodore Ts'o #else 18396ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18406ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 18416ddb2447STheodore Ts'o #endif 184226092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 184326092bf5STheodore Ts'o if (is_remount) { 184426092bf5STheodore Ts'o if (!sbi->s_journal) 184526092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 18465f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 184726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 184826092bf5STheodore Ts'o "Cannot change data mode on remount"); 184926092bf5STheodore Ts'o return -1; 185026092bf5STheodore Ts'o } 185126092bf5STheodore Ts'o } else { 185226092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 185326092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 185426092bf5STheodore Ts'o } 185526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 185626092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 185726092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 185826092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 18595f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 18605f3633e3SJan Kara "quota options when quota turned on"); 186126092bf5STheodore Ts'o return -1; 186226092bf5STheodore Ts'o } 1863e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1864c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 1865c325a67cSTheodore Ts'o "Quota format mount options ignored " 1866262b4662SJan Kara "when QUOTA feature is enabled"); 1867c325a67cSTheodore Ts'o return 1; 1868262b4662SJan Kara } 186926092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 187026092bf5STheodore Ts'o #endif 1871923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1872ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1873ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1874ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1875ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1876ef83b6e8SDan Williams #else 1877923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1878923ae0ffSRoss Zwisler return -1; 1879923ae0ffSRoss Zwisler #endif 18807915a861SAles Novak } else if (token == Opt_data_err_abort) { 18817915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 18827915a861SAles Novak } else if (token == Opt_data_err_ignore) { 18837915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 188426092bf5STheodore Ts'o } else { 188526092bf5STheodore Ts'o if (!args->from) 188626092bf5STheodore Ts'o arg = 1; 188726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 188826092bf5STheodore Ts'o arg = !arg; 188926092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 189026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 189126092bf5STheodore Ts'o "buggy handling of option %s", opt); 189226092bf5STheodore Ts'o WARN_ON(1); 189326092bf5STheodore Ts'o return -1; 189426092bf5STheodore Ts'o } 189526092bf5STheodore Ts'o if (arg != 0) 189626092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 189726092bf5STheodore Ts'o else 189826092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 189926092bf5STheodore Ts'o } 190026092bf5STheodore Ts'o return 1; 190126092bf5STheodore Ts'o } 190226092bf5STheodore Ts'o 1903ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1904c3191067STheodore Ts'o unsigned long *journal_devnum, 1905b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1906661aa520SEric Sandeen int is_remount) 1907ac27a0ecSDave Kleikamp { 1908617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1909ac27a0ecSDave Kleikamp char *p; 1910ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 191126092bf5STheodore Ts'o int token; 1912ac27a0ecSDave Kleikamp 1913ac27a0ecSDave Kleikamp if (!options) 1914ac27a0ecSDave Kleikamp return 1; 1915ac27a0ecSDave Kleikamp 1916ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1917ac27a0ecSDave Kleikamp if (!*p) 1918ac27a0ecSDave Kleikamp continue; 191915121c18SEric Sandeen /* 192015121c18SEric Sandeen * Initialize args struct so we know whether arg was 192115121c18SEric Sandeen * found; some options take optional arguments. 192215121c18SEric Sandeen */ 1923caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1924ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 192526092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 192626092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1927ac27a0ecSDave Kleikamp return 0; 1928ac27a0ecSDave Kleikamp } 1929ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 193049da9392SJan Kara /* 193149da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 193249da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 193349da9392SJan Kara * to support legacy quotas in quota files. 193449da9392SJan Kara */ 193549da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 193649da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 193749da9392SJan Kara "Cannot enable project quota enforcement."); 193849da9392SJan Kara return 0; 193949da9392SJan Kara } 194049da9392SJan Kara if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1941482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1942fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1943ac27a0ecSDave Kleikamp 1944482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1945fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1946ac27a0ecSDave Kleikamp 194756c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1948b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1949b31e1552SEric Sandeen "format mixing"); 1950ac27a0ecSDave Kleikamp return 0; 1951ac27a0ecSDave Kleikamp } 1952ac27a0ecSDave Kleikamp 1953ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1954b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1955b31e1552SEric Sandeen "not specified"); 1956ac27a0ecSDave Kleikamp return 0; 1957ac27a0ecSDave Kleikamp } 1958ac27a0ecSDave Kleikamp } 1959ac27a0ecSDave Kleikamp #endif 1960261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1961261cb20cSJan Kara int blocksize = 1962261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1963261cb20cSJan Kara 196409cbfeafSKirill A. Shutemov if (blocksize < PAGE_SIZE) { 1965261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1966261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1967261cb20cSJan Kara return 0; 1968261cb20cSJan Kara } 1969261cb20cSJan Kara } 1970ac27a0ecSDave Kleikamp return 1; 1971ac27a0ecSDave Kleikamp } 1972ac27a0ecSDave Kleikamp 19732adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 19742adf6da8STheodore Ts'o struct super_block *sb) 19752adf6da8STheodore Ts'o { 19762adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 19772adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 19782adf6da8STheodore Ts'o 19792adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 19802adf6da8STheodore Ts'o char *fmtname = ""; 19812adf6da8STheodore Ts'o 19822adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 19832adf6da8STheodore Ts'o case QFMT_VFS_OLD: 19842adf6da8STheodore Ts'o fmtname = "vfsold"; 19852adf6da8STheodore Ts'o break; 19862adf6da8STheodore Ts'o case QFMT_VFS_V0: 19872adf6da8STheodore Ts'o fmtname = "vfsv0"; 19882adf6da8STheodore Ts'o break; 19892adf6da8STheodore Ts'o case QFMT_VFS_V1: 19902adf6da8STheodore Ts'o fmtname = "vfsv1"; 19912adf6da8STheodore Ts'o break; 19922adf6da8STheodore Ts'o } 19932adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 19942adf6da8STheodore Ts'o } 19952adf6da8STheodore Ts'o 19962adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 1997a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 19982adf6da8STheodore Ts'o 19992adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 2000a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 20012adf6da8STheodore Ts'o #endif 20022adf6da8STheodore Ts'o } 20032adf6da8STheodore Ts'o 20045a916be1STheodore Ts'o static const char *token2str(int token) 20055a916be1STheodore Ts'o { 200650df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 20075a916be1STheodore Ts'o 20085a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 20095a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 20105a916be1STheodore Ts'o break; 20115a916be1STheodore Ts'o return t->pattern; 20125a916be1STheodore Ts'o } 20135a916be1STheodore Ts'o 20142adf6da8STheodore Ts'o /* 20152adf6da8STheodore Ts'o * Show an option if 20162adf6da8STheodore Ts'o * - it's set to a non-default value OR 20172adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 20182adf6da8STheodore Ts'o */ 201966acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 202066acdcf4STheodore Ts'o int nodefs) 20212adf6da8STheodore Ts'o { 20222adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 20232adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 2024*68afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 20255a916be1STheodore Ts'o const struct mount_opts *m; 202666acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 20272adf6da8STheodore Ts'o 202866acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 202966acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 20302adf6da8STheodore Ts'o 20312adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 20325a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 20335a916be1STheodore Ts'o 20345a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 20355a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 20365a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 20375a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 20385a916be1STheodore Ts'o continue; 2039*68afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 20405a916be1STheodore Ts'o continue; /* skip if same as the default */ 20415a916be1STheodore Ts'o if ((want_set && 20425a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 20435a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 20445a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 20455a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 20465a916be1STheodore Ts'o } 20475a916be1STheodore Ts'o 204808cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 20495a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 205008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 205108cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 205208cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 20535a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 205408cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 205508cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 205666acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 20575a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 20585a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 20592adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 20605a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 20612adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 20625a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 206366acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 20645a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 206566acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 20665a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 206766acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 20685a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2069357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 20705a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 207166acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 20725a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 2073*68afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 2074*68afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 20752adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 20765a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 20772adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 20785a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 20792adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 20805a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 20815a916be1STheodore Ts'o } 208266acdcf4STheodore Ts'o if (nodefs || 208366acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 20845a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 20852adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 20862adf6da8STheodore Ts'o 208766acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 208866acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 20895a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2090df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2091df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 20927915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 20937915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 20942adf6da8STheodore Ts'o 20952adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 20962adf6da8STheodore Ts'o return 0; 20972adf6da8STheodore Ts'o } 20982adf6da8STheodore Ts'o 209966acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 210066acdcf4STheodore Ts'o { 210166acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 210266acdcf4STheodore Ts'o } 210366acdcf4STheodore Ts'o 2104ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 210566acdcf4STheodore Ts'o { 210666acdcf4STheodore Ts'o struct super_block *sb = seq->private; 210766acdcf4STheodore Ts'o int rc; 210866acdcf4STheodore Ts'o 2109bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 211066acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 211166acdcf4STheodore Ts'o seq_puts(seq, "\n"); 211266acdcf4STheodore Ts'o return rc; 211366acdcf4STheodore Ts'o } 211466acdcf4STheodore Ts'o 2115617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2116ac27a0ecSDave Kleikamp int read_only) 2117ac27a0ecSDave Kleikamp { 2118617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2119ac27a0ecSDave Kleikamp int res = 0; 2120ac27a0ecSDave Kleikamp 2121617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2122b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2123b31e1552SEric Sandeen "forcing read-only mode"); 21241751e8a6SLinus Torvalds res = SB_RDONLY; 2125ac27a0ecSDave Kleikamp } 2126ac27a0ecSDave Kleikamp if (read_only) 2127281b5995STheodore Ts'o goto done; 2128617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2129b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2130b31e1552SEric Sandeen "running e2fsck is recommended"); 2131c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2132b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2133b31e1552SEric Sandeen "warning: mounting fs with errors, " 2134b31e1552SEric Sandeen "running e2fsck is recommended"); 2135ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2136ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2137ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2138b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2139b31e1552SEric Sandeen "warning: maximal mount count reached, " 2140b31e1552SEric Sandeen "running e2fsck is recommended"); 2141ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 2142ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 2143ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 2144b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2145b31e1552SEric Sandeen "warning: checktime reached, " 2146b31e1552SEric Sandeen "running e2fsck is recommended"); 21470390131bSFrank Mayhar if (!sbi->s_journal) 2148216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2149ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2150617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2151e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 2152ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 2153617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 21540390131bSFrank Mayhar if (sbi->s_journal) 2155e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2156ac27a0ecSDave Kleikamp 2157e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 2158281b5995STheodore Ts'o done: 2159ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2160a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2161a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2162ac27a0ecSDave Kleikamp sb->s_blocksize, 2163ac27a0ecSDave Kleikamp sbi->s_groups_count, 2164617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2165617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2166a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2167ac27a0ecSDave Kleikamp 21687abc52c2SDan Magenheimer cleancache_init_fs(sb); 2169ac27a0ecSDave Kleikamp return res; 2170ac27a0ecSDave Kleikamp } 2171ac27a0ecSDave Kleikamp 2172117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2173117fff10STheodore Ts'o { 2174117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2175117fff10STheodore Ts'o struct flex_groups *new_groups; 2176117fff10STheodore Ts'o int size; 2177117fff10STheodore Ts'o 2178117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2179117fff10STheodore Ts'o return 0; 2180117fff10STheodore Ts'o 2181117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2182117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2183117fff10STheodore Ts'o return 0; 2184117fff10STheodore Ts'o 2185117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2186a7c3e901SMichal Hocko new_groups = kvzalloc(size, GFP_KERNEL); 2187117fff10STheodore Ts'o if (!new_groups) { 2188117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2189117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2190117fff10STheodore Ts'o return -ENOMEM; 2191117fff10STheodore Ts'o } 2192117fff10STheodore Ts'o 2193117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2194117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2195117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2196117fff10STheodore Ts'o sizeof(struct flex_groups))); 2197b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2198117fff10STheodore Ts'o } 2199117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2200117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2201117fff10STheodore Ts'o return 0; 2202117fff10STheodore Ts'o } 2203117fff10STheodore Ts'o 2204772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2205772cb7c8SJose R. Santos { 2206772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2207772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2208772cb7c8SJose R. Santos ext4_group_t flex_group; 2209117fff10STheodore Ts'o int i, err; 2210772cb7c8SJose R. Santos 2211503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2212d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2213772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2214772cb7c8SJose R. Santos return 1; 2215772cb7c8SJose R. Santos } 2216772cb7c8SJose R. Santos 2217117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2218117fff10STheodore Ts'o if (err) 2219772cb7c8SJose R. Santos goto failed; 2220772cb7c8SJose R. Santos 2221772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 222288b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2223772cb7c8SJose R. Santos 2224772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 22257ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 22267ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 222790ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 222824aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 22297ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 22307ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2231772cb7c8SJose R. Santos } 2232772cb7c8SJose R. Santos 2233772cb7c8SJose R. Santos return 1; 2234772cb7c8SJose R. Santos failed: 2235772cb7c8SJose R. Santos return 0; 2236772cb7c8SJose R. Santos } 2237772cb7c8SJose R. Santos 2238e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2239717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2240717d50e4SAndreas Dilger { 2241b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2242717d50e4SAndreas Dilger __u16 crc = 0; 2243717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2244e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2245717d50e4SAndreas Dilger 22469aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2247feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2248feb0ab32SDarrick J. Wong __u32 csum32; 2249b47820edSDaeho Jeong __u16 dummy_csum = 0; 2250feb0ab32SDarrick J. Wong 2251feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2252feb0ab32SDarrick J. Wong sizeof(le_group)); 2253b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2254b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2255b47820edSDaeho Jeong sizeof(dummy_csum)); 2256b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2257b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2258b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2259b47820edSDaeho Jeong sbi->s_desc_size - offset); 2260feb0ab32SDarrick J. Wong 2261feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2262feb0ab32SDarrick J. Wong goto out; 2263feb0ab32SDarrick J. Wong } 2264feb0ab32SDarrick J. Wong 2265feb0ab32SDarrick J. Wong /* old crc16 code */ 2266e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2267813d32f9SDarrick J. Wong return 0; 2268813d32f9SDarrick J. Wong 2269717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2270717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2271717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2272717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2273717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2274e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2275717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2276717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2277717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2278717d50e4SAndreas Dilger offset); 2279717d50e4SAndreas Dilger 2280feb0ab32SDarrick J. Wong out: 2281717d50e4SAndreas Dilger return cpu_to_le16(crc); 2282717d50e4SAndreas Dilger } 2283717d50e4SAndreas Dilger 2284feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2285717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2286717d50e4SAndreas Dilger { 2287feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2288e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2289717d50e4SAndreas Dilger return 0; 2290717d50e4SAndreas Dilger 2291717d50e4SAndreas Dilger return 1; 2292717d50e4SAndreas Dilger } 2293717d50e4SAndreas Dilger 2294feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2295feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2296feb0ab32SDarrick J. Wong { 2297feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2298feb0ab32SDarrick J. Wong return; 2299e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2300feb0ab32SDarrick J. Wong } 2301feb0ab32SDarrick J. Wong 2302ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2303bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2304829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2305bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2306ac27a0ecSDave Kleikamp { 2307617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2308617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2309617ba13bSMingming Cao ext4_fsblk_t last_block; 2310bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2311bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2312bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2313ce421581SJose R. Santos int flexbg_flag = 0; 2314bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2315ac27a0ecSDave Kleikamp 2316e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2317ce421581SJose R. Santos flexbg_flag = 1; 2318ce421581SJose R. Santos 2319617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2320ac27a0ecSDave Kleikamp 2321197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2322197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2323197cd65aSAkinobu Mita 2324ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2325bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2326ac27a0ecSDave Kleikamp else 2327ac27a0ecSDave Kleikamp last_block = first_block + 2328617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2329ac27a0ecSDave Kleikamp 2330bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2331bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2332bfff6873SLukas Czerner grp = i; 2333bfff6873SLukas Czerner 23348fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2335829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2336829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2337829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2338829fa70dSTheodore Ts'o "superblock", i); 233918db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 234018db4b4eSTheodore Ts'o return 0; 2341829fa70dSTheodore Ts'o } 23422b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2343b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2344a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2345b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2346ac27a0ecSDave Kleikamp return 0; 2347ac27a0ecSDave Kleikamp } 23488fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2349829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2350829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2351829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2352829fa70dSTheodore Ts'o "superblock", i); 235318db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 235418db4b4eSTheodore Ts'o return 0; 2355829fa70dSTheodore Ts'o } 23562b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2357b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2358a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2359b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2360ac27a0ecSDave Kleikamp return 0; 2361ac27a0ecSDave Kleikamp } 23628fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2363829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2364829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2365829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2366829fa70dSTheodore Ts'o "superblock", i); 236718db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 236818db4b4eSTheodore Ts'o return 0; 2369829fa70dSTheodore Ts'o } 2370bd81d8eeSLaurent Vivier if (inode_table < first_block || 23712b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2372b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2373a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2374b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2375ac27a0ecSDave Kleikamp return 0; 2376ac27a0ecSDave Kleikamp } 2377955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2378feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2379b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2380b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2381e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2382fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 2383bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 2384955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2385717d50e4SAndreas Dilger return 0; 2386717d50e4SAndreas Dilger } 23877ee1ec4cSLi Zefan } 2388955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2389ce421581SJose R. Santos if (!flexbg_flag) 2390617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2391ac27a0ecSDave Kleikamp } 2392bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2393bfff6873SLukas Czerner *first_not_zeroed = grp; 2394ac27a0ecSDave Kleikamp return 1; 2395ac27a0ecSDave Kleikamp } 2396ac27a0ecSDave Kleikamp 2397617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2398ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2399ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2400ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2401ac27a0ecSDave Kleikamp * 2402ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2403ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2404ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2405ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2406ac27a0ecSDave Kleikamp * 2407ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2408ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2409ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2410617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2411ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2412ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2413ac27a0ecSDave Kleikamp */ 2414617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2415617ba13bSMingming Cao struct ext4_super_block *es) 2416ac27a0ecSDave Kleikamp { 2417ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 24182c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2419ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 242095f1fda4Szhangyi (F) int quota_update = 0; 2421ac27a0ecSDave Kleikamp int i; 2422ac27a0ecSDave Kleikamp #endif 2423ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2424ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2425ac27a0ecSDave Kleikamp return; 2426ac27a0ecSDave Kleikamp } 2427ac27a0ecSDave Kleikamp 2428a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2429b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2430b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2431a8f48a95SEric Sandeen return; 2432a8f48a95SEric Sandeen } 2433a8f48a95SEric Sandeen 2434d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2435d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2436d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2437d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2438d39195c3SAmir Goldstein return; 2439d39195c3SAmir Goldstein } 2440d39195c3SAmir Goldstein 2441617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2442c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 24431751e8a6SLinus Torvalds if (es->s_last_orphan && !(s_flags & SB_RDONLY)) { 244484474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2445ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2446ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2447c25f9bc6SEric Sandeen } 2448ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2449ac27a0ecSDave Kleikamp return; 2450ac27a0ecSDave Kleikamp } 2451ac27a0ecSDave Kleikamp 24521751e8a6SLinus Torvalds if (s_flags & SB_RDONLY) { 2453b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 24541751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 2455ac27a0ecSDave Kleikamp } 2456ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2457ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 24581751e8a6SLinus Torvalds sb->s_flags |= SB_ACTIVE; 245995f1fda4Szhangyi (F) 246095f1fda4Szhangyi (F) /* 246195f1fda4Szhangyi (F) * Turn on quotas which were not enabled for read-only mounts if 246295f1fda4Szhangyi (F) * filesystem has quota feature, so that they are updated correctly. 246395f1fda4Szhangyi (F) */ 24641751e8a6SLinus Torvalds if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) { 246595f1fda4Szhangyi (F) int ret = ext4_enable_quotas(sb); 246695f1fda4Szhangyi (F) 246795f1fda4Szhangyi (F) if (!ret) 246895f1fda4Szhangyi (F) quota_update = 1; 246995f1fda4Szhangyi (F) else 247095f1fda4Szhangyi (F) ext4_msg(sb, KERN_ERR, 247195f1fda4Szhangyi (F) "Cannot turn on quotas: error %d", ret); 247295f1fda4Szhangyi (F) } 247395f1fda4Szhangyi (F) 247495f1fda4Szhangyi (F) /* Turn on journaled quotas used for old sytle */ 2475a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2476617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2477617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 247895f1fda4Szhangyi (F) 247995f1fda4Szhangyi (F) if (!ret) 248095f1fda4Szhangyi (F) quota_update = 1; 248195f1fda4Szhangyi (F) else 2482b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2483b31e1552SEric Sandeen "Cannot turn on journaled " 248495f1fda4Szhangyi (F) "quota: type %d: error %d", i, ret); 2485ac27a0ecSDave Kleikamp } 2486ac27a0ecSDave Kleikamp } 2487ac27a0ecSDave Kleikamp #endif 2488ac27a0ecSDave Kleikamp 2489ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2490ac27a0ecSDave Kleikamp struct inode *inode; 2491ac27a0ecSDave Kleikamp 2492c65d5c6cSVegard Nossum /* 2493c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2494c65d5c6cSVegard Nossum * so, skip the rest. 2495c65d5c6cSVegard Nossum */ 2496c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2497c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2498c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2499c65d5c6cSVegard Nossum break; 2500c65d5c6cSVegard Nossum } 2501c65d5c6cSVegard Nossum 250297bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 250397bd42b9SJosef Bacik if (IS_ERR(inode)) { 2504ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2505ac27a0ecSDave Kleikamp break; 2506ac27a0ecSDave Kleikamp } 2507ac27a0ecSDave Kleikamp 2508617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2509871a2931SChristoph Hellwig dquot_initialize(inode); 2510ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2511566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2512b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2513b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 251446e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2515e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2516ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 25175955102cSAl Viro inode_lock(inode); 251855f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 25192c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 25202c98eb5eSTheodore Ts'o if (ret) 25212c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 25225955102cSAl Viro inode_unlock(inode); 2523ac27a0ecSDave Kleikamp nr_truncates++; 2524ac27a0ecSDave Kleikamp } else { 2525566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2526b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2527b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 252846e665e9SHarvey Harrison __func__, inode->i_ino); 2529ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2530ac27a0ecSDave Kleikamp inode->i_ino); 2531ac27a0ecSDave Kleikamp nr_orphans++; 2532ac27a0ecSDave Kleikamp } 2533ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2534ac27a0ecSDave Kleikamp } 2535ac27a0ecSDave Kleikamp 2536ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2537ac27a0ecSDave Kleikamp 2538ac27a0ecSDave Kleikamp if (nr_orphans) 2539b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2540b31e1552SEric Sandeen PLURAL(nr_orphans)); 2541ac27a0ecSDave Kleikamp if (nr_truncates) 2542b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2543b31e1552SEric Sandeen PLURAL(nr_truncates)); 2544ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 254595f1fda4Szhangyi (F) /* Turn off quotas if they were enabled for orphan cleanup */ 254695f1fda4Szhangyi (F) if (quota_update) { 2547a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 254895f1fda4Szhangyi (F) if (sb_dqopt(sb)->files[i]) 2549287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2550ac27a0ecSDave Kleikamp } 255195f1fda4Szhangyi (F) } 2552ac27a0ecSDave Kleikamp #endif 25531751e8a6SLinus Torvalds sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 2554ac27a0ecSDave Kleikamp } 25550b8e58a1SAndreas Dilger 2556cd2291a4SEric Sandeen /* 2557cd2291a4SEric Sandeen * Maximal extent format file size. 2558cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2559cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2560cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2561cd2291a4SEric Sandeen * so that won't be a limiting factor. 2562cd2291a4SEric Sandeen * 2563f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2564f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2565f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2566f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2567f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2568f17722f9SLukas Czerner * 2569cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2570cd2291a4SEric Sandeen */ 2571f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2572cd2291a4SEric Sandeen { 2573cd2291a4SEric Sandeen loff_t res; 2574cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2575cd2291a4SEric Sandeen 2576cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2577f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2578cd2291a4SEric Sandeen /* 257990c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2580cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2581cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2582cd2291a4SEric Sandeen */ 2583cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2584cd2291a4SEric Sandeen 2585cd2291a4SEric Sandeen /* total blocks in file system block size */ 2586cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2587cd2291a4SEric Sandeen upper_limit <<= blkbits; 2588cd2291a4SEric Sandeen } 2589cd2291a4SEric Sandeen 2590f17722f9SLukas Czerner /* 2591f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2592f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2593f17722f9SLukas Czerner * size 2594f17722f9SLukas Czerner */ 2595f17722f9SLukas Czerner res = (1LL << 32) - 1; 2596cd2291a4SEric Sandeen res <<= blkbits; 2597cd2291a4SEric Sandeen 2598cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2599cd2291a4SEric Sandeen if (res > upper_limit) 2600cd2291a4SEric Sandeen res = upper_limit; 2601cd2291a4SEric Sandeen 2602cd2291a4SEric Sandeen return res; 2603cd2291a4SEric Sandeen } 2604ac27a0ecSDave Kleikamp 2605ac27a0ecSDave Kleikamp /* 2606cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 26070fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 26080fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2609ac27a0ecSDave Kleikamp */ 2610f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2611ac27a0ecSDave Kleikamp { 2612617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 26130fc1b451SAneesh Kumar K.V int meta_blocks; 26140fc1b451SAneesh Kumar K.V loff_t upper_limit; 26150b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 26160b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 26170b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 26180b8e58a1SAndreas Dilger * 26190b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 26200b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 26210fc1b451SAneesh Kumar K.V */ 26220fc1b451SAneesh Kumar K.V 2623f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 26240fc1b451SAneesh Kumar K.V /* 262590c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 26260b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 26270b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 26280fc1b451SAneesh Kumar K.V */ 26290fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 26300fc1b451SAneesh Kumar K.V 26310fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 26320fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 26330fc1b451SAneesh Kumar K.V 26340fc1b451SAneesh Kumar K.V } else { 26358180a562SAneesh Kumar K.V /* 26368180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 26378180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 26388180a562SAneesh Kumar K.V * represent total number of blocks in 26398180a562SAneesh Kumar K.V * file system block size 26408180a562SAneesh Kumar K.V */ 26410fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 26420fc1b451SAneesh Kumar K.V 26430fc1b451SAneesh Kumar K.V } 26440fc1b451SAneesh Kumar K.V 26450fc1b451SAneesh Kumar K.V /* indirect blocks */ 26460fc1b451SAneesh Kumar K.V meta_blocks = 1; 26470fc1b451SAneesh Kumar K.V /* double indirect blocks */ 26480fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 26490fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 26500fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 26510fc1b451SAneesh Kumar K.V 26520fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 26530fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2654ac27a0ecSDave Kleikamp 2655ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2656ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2657ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2658ac27a0ecSDave Kleikamp res <<= bits; 2659ac27a0ecSDave Kleikamp if (res > upper_limit) 2660ac27a0ecSDave Kleikamp res = upper_limit; 26610fc1b451SAneesh Kumar K.V 26620fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 26630fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 26640fc1b451SAneesh Kumar K.V 2665ac27a0ecSDave Kleikamp return res; 2666ac27a0ecSDave Kleikamp } 2667ac27a0ecSDave Kleikamp 2668617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 266970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2670ac27a0ecSDave Kleikamp { 2671617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2672fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2673ac27a0ecSDave Kleikamp int has_super = 0; 2674ac27a0ecSDave Kleikamp 2675ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2676ac27a0ecSDave Kleikamp 2677e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 267870bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2679ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2680617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2681ac27a0ecSDave Kleikamp has_super = 1; 26820b8e58a1SAndreas Dilger 2683bd63f6b0SDarrick J. Wong /* 2684bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2685bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2686bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2687bd63f6b0SDarrick J. Wong * compensate. 2688bd63f6b0SDarrick J. Wong */ 2689bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 269049598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 2691bd63f6b0SDarrick J. Wong has_super++; 2692bd63f6b0SDarrick J. Wong 2693617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2694ac27a0ecSDave Kleikamp } 2695ac27a0ecSDave Kleikamp 2696c9de560dSAlex Tomas /** 2697c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2698c9de560dSAlex Tomas * @sbi: In memory super block info 2699c9de560dSAlex Tomas * 2700c9de560dSAlex Tomas * If we have specified it via mount option, then 2701c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2702c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2703c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2704c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2705c9de560dSAlex Tomas * 2706c9de560dSAlex Tomas */ 2707c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2708c9de560dSAlex Tomas { 2709c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2710c9de560dSAlex Tomas unsigned long stripe_width = 2711c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 27123eb08658SDan Ehrenberg int ret; 2713c9de560dSAlex Tomas 2714c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 27153eb08658SDan Ehrenberg ret = sbi->s_stripe; 27165469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 27173eb08658SDan Ehrenberg ret = stripe_width; 27185469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 27193eb08658SDan Ehrenberg ret = stride; 27203eb08658SDan Ehrenberg else 27213eb08658SDan Ehrenberg ret = 0; 2722c9de560dSAlex Tomas 27233eb08658SDan Ehrenberg /* 27243eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 27253eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 27263eb08658SDan Ehrenberg */ 27273eb08658SDan Ehrenberg if (ret <= 1) 27283eb08658SDan Ehrenberg ret = 0; 2729c9de560dSAlex Tomas 27303eb08658SDan Ehrenberg return ret; 2731c9de560dSAlex Tomas } 2732ac27a0ecSDave Kleikamp 2733a13fb1a4SEric Sandeen /* 2734a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2735a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2736a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2737a13fb1a4SEric Sandeen * 0 if it cannot be. 2738a13fb1a4SEric Sandeen */ 2739a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2740a13fb1a4SEric Sandeen { 2741e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2742a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2743a13fb1a4SEric Sandeen "Couldn't mount because of " 2744a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2745a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2746a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2747a13fb1a4SEric Sandeen return 0; 2748a13fb1a4SEric Sandeen } 2749a13fb1a4SEric Sandeen 2750a13fb1a4SEric Sandeen if (readonly) 2751a13fb1a4SEric Sandeen return 1; 2752a13fb1a4SEric Sandeen 2753e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 27542cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 27551751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 27562cb5cc8bSDarrick J. Wong return 1; 27572cb5cc8bSDarrick J. Wong } 27582cb5cc8bSDarrick J. Wong 2759a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2760e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2761a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2762a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2763a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2764a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2765a13fb1a4SEric Sandeen return 0; 2766a13fb1a4SEric Sandeen } 2767a13fb1a4SEric Sandeen /* 2768a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2769a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2770a13fb1a4SEric Sandeen */ 2771e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2772a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2773a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2774a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2775a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2776a13fb1a4SEric Sandeen return 0; 2777a13fb1a4SEric Sandeen } 2778a13fb1a4SEric Sandeen } 2779e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2780bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2781bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2782bab08ab9STheodore Ts'o "extents feature\n"); 2783bab08ab9STheodore Ts'o return 0; 2784bab08ab9STheodore Ts'o } 27857c319d32SAditya Kali 27867c319d32SAditya Kali #ifndef CONFIG_QUOTA 2787e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 27887c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 27897c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 27907c319d32SAditya Kali "without CONFIG_QUOTA"); 27917c319d32SAditya Kali return 0; 27927c319d32SAditya Kali } 2793689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2794689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2795689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2796689c958cSLi Xi "without CONFIG_QUOTA"); 2797689c958cSLi Xi return 0; 2798689c958cSLi Xi } 27997c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2800a13fb1a4SEric Sandeen return 1; 2801a13fb1a4SEric Sandeen } 2802a13fb1a4SEric Sandeen 280366e61a9eSTheodore Ts'o /* 280466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 280566e61a9eSTheodore Ts'o * on the file system 280666e61a9eSTheodore Ts'o */ 2807235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 280866e61a9eSTheodore Ts'o { 2809235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 2810235699a8SKees Cook struct super_block *sb = sbi->s_sb; 2811235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 281266e61a9eSTheodore Ts'o 281366e61a9eSTheodore Ts'o if (es->s_error_count) 2814ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2815ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 281666e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 281766e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2818ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 281966e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 282066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 282166e61a9eSTheodore Ts'o es->s_first_error_func, 282266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 282366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 2824651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 282566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 282666e61a9eSTheodore Ts'o if (es->s_first_error_block) 2827651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 282866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 2829651e1c3bSJoe Perches printk(KERN_CONT "\n"); 283066e61a9eSTheodore Ts'o } 283166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2832ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 283366e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 283466e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 283566e61a9eSTheodore Ts'o es->s_last_error_func, 283666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 283766e61a9eSTheodore Ts'o if (es->s_last_error_ino) 2838651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 283966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 284066e61a9eSTheodore Ts'o if (es->s_last_error_block) 2841651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 284266e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 2843651e1c3bSJoe Perches printk(KERN_CONT "\n"); 284466e61a9eSTheodore Ts'o } 284566e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 284666e61a9eSTheodore Ts'o } 284766e61a9eSTheodore Ts'o 2848bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2849bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2850bfff6873SLukas Czerner { 2851bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2852bfff6873SLukas Czerner ext4_group_t group, ngroups; 2853bfff6873SLukas Czerner struct super_block *sb; 2854bfff6873SLukas Czerner unsigned long timeout = 0; 2855bfff6873SLukas Czerner int ret = 0; 2856bfff6873SLukas Czerner 2857bfff6873SLukas Czerner sb = elr->lr_super; 2858bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2859bfff6873SLukas Czerner 2860bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2861bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2862bfff6873SLukas Czerner if (!gdp) { 2863bfff6873SLukas Czerner ret = 1; 2864bfff6873SLukas Czerner break; 2865bfff6873SLukas Czerner } 2866bfff6873SLukas Czerner 2867bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2868bfff6873SLukas Czerner break; 2869bfff6873SLukas Czerner } 2870bfff6873SLukas Czerner 28717f511862STheodore Ts'o if (group >= ngroups) 2872bfff6873SLukas Czerner ret = 1; 2873bfff6873SLukas Czerner 2874bfff6873SLukas Czerner if (!ret) { 2875bfff6873SLukas Czerner timeout = jiffies; 2876bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2877bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2878bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 287951ce6511SLukas Czerner timeout = (jiffies - timeout) * 288051ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2881bfff6873SLukas Czerner elr->lr_timeout = timeout; 2882bfff6873SLukas Czerner } 2883bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2884bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2885bfff6873SLukas Czerner } 2886bfff6873SLukas Czerner return ret; 2887bfff6873SLukas Czerner } 2888bfff6873SLukas Czerner 2889bfff6873SLukas Czerner /* 2890bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 28914ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2892bfff6873SLukas Czerner */ 2893bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2894bfff6873SLukas Czerner { 2895bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2896bfff6873SLukas Czerner 2897bfff6873SLukas Czerner if (!elr) 2898bfff6873SLukas Czerner return; 2899bfff6873SLukas Czerner 2900bfff6873SLukas Czerner sbi = elr->lr_sbi; 2901bfff6873SLukas Czerner 2902bfff6873SLukas Czerner list_del(&elr->lr_request); 2903bfff6873SLukas Czerner sbi->s_li_request = NULL; 2904bfff6873SLukas Czerner kfree(elr); 2905bfff6873SLukas Czerner } 2906bfff6873SLukas Czerner 2907bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2908bfff6873SLukas Czerner { 29091bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29101bb933fbSLukas Czerner if (!ext4_li_info) { 29111bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2912bfff6873SLukas Czerner return; 29131bb933fbSLukas Czerner } 2914bfff6873SLukas Czerner 2915bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29161bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2917bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29181bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2919bfff6873SLukas Czerner } 2920bfff6873SLukas Czerner 29218f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29228f1f7453SEric Sandeen 2923bfff6873SLukas Czerner /* 2924bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2925bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2926bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2927bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2928bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2929bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2930bfff6873SLukas Czerner * next waking time and put itself into sleep. 2931bfff6873SLukas Czerner */ 2932bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2933bfff6873SLukas Czerner { 2934bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2935bfff6873SLukas Czerner struct list_head *pos, *n; 2936bfff6873SLukas Czerner struct ext4_li_request *elr; 29374ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2938bfff6873SLukas Czerner 2939bfff6873SLukas Czerner BUG_ON(NULL == eli); 2940bfff6873SLukas Czerner 2941bfff6873SLukas Czerner cont_thread: 2942bfff6873SLukas Czerner while (true) { 2943bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2944bfff6873SLukas Czerner 2945bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2946bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2947bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2948bfff6873SLukas Czerner goto exit_thread; 2949bfff6873SLukas Czerner } 2950bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2951e22834f0SDmitry Monakhov int err = 0; 2952e22834f0SDmitry Monakhov int progress = 0; 2953bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2954bfff6873SLukas Czerner lr_request); 2955bfff6873SLukas Czerner 2956e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 2957e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 2958e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 2959e22834f0SDmitry Monakhov continue; 2960e22834f0SDmitry Monakhov } 2961e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 2962e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 2963e22834f0SDmitry Monakhov progress = 1; 2964e22834f0SDmitry Monakhov /* 2965e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 2966e22834f0SDmitry Monakhov * be removed from the list, it is 2967e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 2968e22834f0SDmitry Monakhov */ 2969e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 2970e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 2971e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 2972e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 2973e22834f0SDmitry Monakhov n = pos->next; 2974e22834f0SDmitry Monakhov } 2975e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 2976e22834f0SDmitry Monakhov } 2977b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2978e22834f0SDmitry Monakhov if (err) { 2979bfff6873SLukas Czerner ext4_remove_li_request(elr); 2980bfff6873SLukas Czerner continue; 2981bfff6873SLukas Czerner } 2982e22834f0SDmitry Monakhov if (!progress) { 2983e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 2984e22834f0SDmitry Monakhov (prandom_u32() 2985e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 2986b2c78cd0STheodore Ts'o } 2987bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2988bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2989bfff6873SLukas Czerner } 2990bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2991bfff6873SLukas Czerner 2992a0acae0eSTejun Heo try_to_freeze(); 2993bfff6873SLukas Czerner 29944ed5c033SLukas Czerner cur = jiffies; 29954ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2996f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2997bfff6873SLukas Czerner cond_resched(); 2998bfff6873SLukas Czerner continue; 2999bfff6873SLukas Czerner } 3000bfff6873SLukas Czerner 30014ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 30024ed5c033SLukas Czerner 30038f1f7453SEric Sandeen if (kthread_should_stop()) { 30048f1f7453SEric Sandeen ext4_clear_request_list(); 30058f1f7453SEric Sandeen goto exit_thread; 30068f1f7453SEric Sandeen } 3007bfff6873SLukas Czerner } 3008bfff6873SLukas Czerner 3009bfff6873SLukas Czerner exit_thread: 3010bfff6873SLukas Czerner /* 3011bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3012bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3013bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3014bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3015bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3016bfff6873SLukas Czerner * new one. 3017bfff6873SLukas Czerner */ 3018bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3019bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3020bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3021bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3022bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3023bfff6873SLukas Czerner goto cont_thread; 3024bfff6873SLukas Czerner } 3025bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3026bfff6873SLukas Czerner kfree(ext4_li_info); 3027bfff6873SLukas Czerner ext4_li_info = NULL; 3028bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3029bfff6873SLukas Czerner 3030bfff6873SLukas Czerner return 0; 3031bfff6873SLukas Czerner } 3032bfff6873SLukas Czerner 3033bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3034bfff6873SLukas Czerner { 3035bfff6873SLukas Czerner struct list_head *pos, *n; 3036bfff6873SLukas Czerner struct ext4_li_request *elr; 3037bfff6873SLukas Czerner 3038bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3039bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3040bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3041bfff6873SLukas Czerner lr_request); 3042bfff6873SLukas Czerner ext4_remove_li_request(elr); 3043bfff6873SLukas Czerner } 3044bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3045bfff6873SLukas Czerner } 3046bfff6873SLukas Czerner 3047bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3048bfff6873SLukas Czerner { 30498f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30508f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30518f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30528f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3053bfff6873SLukas Czerner ext4_clear_request_list(); 3054bfff6873SLukas Czerner kfree(ext4_li_info); 3055bfff6873SLukas Czerner ext4_li_info = NULL; 305692b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3057bfff6873SLukas Czerner "initialization thread\n", 3058bfff6873SLukas Czerner err); 3059bfff6873SLukas Czerner return err; 3060bfff6873SLukas Czerner } 3061bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3062bfff6873SLukas Czerner return 0; 3063bfff6873SLukas Czerner } 3064bfff6873SLukas Czerner 3065bfff6873SLukas Czerner /* 3066bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3067bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3068bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3069bfff6873SLukas Czerner * groups and return total number of groups. 3070bfff6873SLukas Czerner */ 3071bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3072bfff6873SLukas Czerner { 3073bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3074bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3075bfff6873SLukas Czerner 3076bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3077bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3078bfff6873SLukas Czerner if (!gdp) 3079bfff6873SLukas Czerner continue; 3080bfff6873SLukas Czerner 3081bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3082bfff6873SLukas Czerner break; 3083bfff6873SLukas Czerner } 3084bfff6873SLukas Czerner 3085bfff6873SLukas Czerner return group; 3086bfff6873SLukas Czerner } 3087bfff6873SLukas Czerner 3088bfff6873SLukas Czerner static int ext4_li_info_new(void) 3089bfff6873SLukas Czerner { 3090bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3091bfff6873SLukas Czerner 3092bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3093bfff6873SLukas Czerner if (!eli) 3094bfff6873SLukas Czerner return -ENOMEM; 3095bfff6873SLukas Czerner 3096bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3097bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3098bfff6873SLukas Czerner 3099bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3100bfff6873SLukas Czerner 3101bfff6873SLukas Czerner ext4_li_info = eli; 3102bfff6873SLukas Czerner 3103bfff6873SLukas Czerner return 0; 3104bfff6873SLukas Czerner } 3105bfff6873SLukas Czerner 3106bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3107bfff6873SLukas Czerner ext4_group_t start) 3108bfff6873SLukas Czerner { 3109bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3110bfff6873SLukas Czerner struct ext4_li_request *elr; 3111bfff6873SLukas Czerner 3112bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3113bfff6873SLukas Czerner if (!elr) 3114bfff6873SLukas Czerner return NULL; 3115bfff6873SLukas Czerner 3116bfff6873SLukas Czerner elr->lr_super = sb; 3117bfff6873SLukas Czerner elr->lr_sbi = sbi; 3118bfff6873SLukas Czerner elr->lr_next_group = start; 3119bfff6873SLukas Czerner 3120bfff6873SLukas Czerner /* 3121bfff6873SLukas Czerner * Randomize first schedule time of the request to 3122bfff6873SLukas Czerner * spread the inode table initialization requests 3123bfff6873SLukas Czerner * better. 3124bfff6873SLukas Czerner */ 3125dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3126dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3127bfff6873SLukas Czerner return elr; 3128bfff6873SLukas Czerner } 3129bfff6873SLukas Czerner 31307f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3131bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3132bfff6873SLukas Czerner { 3133bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31347f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 313549598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 31366c5a6cb9SAndrew Morton int ret = 0; 3137bfff6873SLukas Czerner 31387f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 313951ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 314051ce6511SLukas Czerner /* 314151ce6511SLukas Czerner * Reset timeout so it can be computed again, because 314251ce6511SLukas Czerner * s_li_wait_mult might have changed. 314351ce6511SLukas Czerner */ 314451ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31457f511862STheodore Ts'o goto out; 314651ce6511SLukas Czerner } 3147bfff6873SLukas Czerner 3148bc98a42cSDavid Howells if (first_not_zeroed == ngroups || sb_rdonly(sb) || 314955ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31507f511862STheodore Ts'o goto out; 3151bfff6873SLukas Czerner 3152bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31537f511862STheodore Ts'o if (!elr) { 31547f511862STheodore Ts'o ret = -ENOMEM; 31557f511862STheodore Ts'o goto out; 31567f511862STheodore Ts'o } 3157bfff6873SLukas Czerner 3158bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3159bfff6873SLukas Czerner ret = ext4_li_info_new(); 3160bfff6873SLukas Czerner if (ret) 3161bfff6873SLukas Czerner goto out; 3162bfff6873SLukas Czerner } 3163bfff6873SLukas Czerner 3164bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3165bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3166bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3167bfff6873SLukas Czerner 3168bfff6873SLukas Czerner sbi->s_li_request = elr; 316946e4690bSTao Ma /* 317046e4690bSTao Ma * set elr to NULL here since it has been inserted to 317146e4690bSTao Ma * the request_list and the removal and free of it is 317246e4690bSTao Ma * handled by ext4_clear_request_list from now on. 317346e4690bSTao Ma */ 317446e4690bSTao Ma elr = NULL; 3175bfff6873SLukas Czerner 3176bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3177bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3178bfff6873SLukas Czerner if (ret) 3179bfff6873SLukas Czerner goto out; 3180bfff6873SLukas Czerner } 3181bfff6873SLukas Czerner out: 3182bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3183beed5ecbSNicolas Kaiser if (ret) 3184bfff6873SLukas Czerner kfree(elr); 3185bfff6873SLukas Czerner return ret; 3186bfff6873SLukas Czerner } 3187bfff6873SLukas Czerner 3188bfff6873SLukas Czerner /* 3189bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3190bfff6873SLukas Czerner * module unload. 3191bfff6873SLukas Czerner */ 3192bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3193bfff6873SLukas Czerner { 3194bfff6873SLukas Czerner /* 3195bfff6873SLukas Czerner * If thread exited earlier 3196bfff6873SLukas Czerner * there's nothing to be done. 3197bfff6873SLukas Czerner */ 31988f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3199bfff6873SLukas Czerner return; 3200bfff6873SLukas Czerner 32018f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3202bfff6873SLukas Czerner } 3203bfff6873SLukas Czerner 320425ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 320525ed6e8aSDarrick J. Wong { 320625ed6e8aSDarrick J. Wong int ret = 1; 320725ed6e8aSDarrick J. Wong int compat, incompat; 320825ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 320925ed6e8aSDarrick J. Wong 32109aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3211db9ee220SDarrick J. Wong /* journal checksum v3 */ 321225ed6e8aSDarrick J. Wong compat = 0; 3213db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 321425ed6e8aSDarrick J. Wong } else { 321525ed6e8aSDarrick J. Wong /* journal checksum v1 */ 321625ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 321725ed6e8aSDarrick J. Wong incompat = 0; 321825ed6e8aSDarrick J. Wong } 321925ed6e8aSDarrick J. Wong 3220feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3221feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3222feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3223feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 322425ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 322525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 322625ed6e8aSDarrick J. Wong compat, 0, 322725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 322825ed6e8aSDarrick J. Wong incompat); 322925ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 323025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 323125ed6e8aSDarrick J. Wong compat, 0, 323225ed6e8aSDarrick J. Wong incompat); 323325ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 323425ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 323525ed6e8aSDarrick J. Wong } else { 3236feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3237feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 323825ed6e8aSDarrick J. Wong } 323925ed6e8aSDarrick J. Wong 324025ed6e8aSDarrick J. Wong return ret; 324125ed6e8aSDarrick J. Wong } 324225ed6e8aSDarrick J. Wong 3243952fc18eSTheodore Ts'o /* 3244952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3245952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3246952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3247952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3248952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3249952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3250952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3251952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3252952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3253952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3254952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3255952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3256952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3257952fc18eSTheodore Ts'o */ 3258952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3259952fc18eSTheodore Ts'o char *buf) 3260952fc18eSTheodore Ts'o { 3261952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3262952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3263952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3264952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3265952fc18eSTheodore Ts'o int s, j, count = 0; 3266952fc18eSTheodore Ts'o 3267e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 32680548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32690548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32700548bbb8STheodore Ts'o 3271952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3272952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3273952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3274952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3275952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3276952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3277952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3278952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3279952fc18eSTheodore Ts'o count++; 3280952fc18eSTheodore Ts'o } 3281952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3282952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3283952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3284952fc18eSTheodore Ts'o count++; 3285952fc18eSTheodore Ts'o } 3286952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3287952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3288952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3289952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3290952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3291952fc18eSTheodore Ts'o count++; 3292952fc18eSTheodore Ts'o } 3293952fc18eSTheodore Ts'o if (i != grp) 3294952fc18eSTheodore Ts'o continue; 3295952fc18eSTheodore Ts'o s = 0; 3296952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3297952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3298952fc18eSTheodore Ts'o count++; 3299952fc18eSTheodore Ts'o } 3300c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3301c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3302c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3303c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3304c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3305952fc18eSTheodore Ts'o } 3306c48ae41bSTheodore Ts'o count += j; 3307c48ae41bSTheodore Ts'o for (; j > 0; j--) 3308c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3309952fc18eSTheodore Ts'o } 3310952fc18eSTheodore Ts'o if (!count) 3311952fc18eSTheodore Ts'o return 0; 3312952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3313952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3314952fc18eSTheodore Ts'o } 3315952fc18eSTheodore Ts'o 3316952fc18eSTheodore Ts'o /* 3317952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3318952fc18eSTheodore Ts'o */ 3319952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3320952fc18eSTheodore Ts'o { 3321952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3322952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 33233c816dedSEric Whitney struct inode *j_inode; 33243c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3325952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3326952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 33274fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3328952fc18eSTheodore Ts'o 3329952fc18eSTheodore Ts'o if (!buf) 3330952fc18eSTheodore Ts'o return -ENOMEM; 3331952fc18eSTheodore Ts'o 3332952fc18eSTheodore Ts'o /* 3333952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3334952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3335952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3336952fc18eSTheodore Ts'o */ 3337952fc18eSTheodore Ts'o 3338952fc18eSTheodore Ts'o /* 3339952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3340952fc18eSTheodore Ts'o */ 3341952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3342952fc18eSTheodore Ts'o 3343952fc18eSTheodore Ts'o /* 3344952fc18eSTheodore Ts'o * Add the overhead found in each block group 3345952fc18eSTheodore Ts'o */ 3346952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3347952fc18eSTheodore Ts'o int blks; 3348952fc18eSTheodore Ts'o 3349952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3350952fc18eSTheodore Ts'o overhead += blks; 3351952fc18eSTheodore Ts'o if (blks) 3352952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3353952fc18eSTheodore Ts'o cond_resched(); 3354952fc18eSTheodore Ts'o } 33553c816dedSEric Whitney 33563c816dedSEric Whitney /* 33573c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 33583c816dedSEric Whitney * loaded or not 33593c816dedSEric Whitney */ 3360b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3361810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33623c816dedSEric Whitney else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { 33633c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 33643c816dedSEric Whitney if (j_inode) { 33653c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 33663c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 33673c816dedSEric Whitney iput(j_inode); 33683c816dedSEric Whitney } else { 33693c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 33703c816dedSEric Whitney } 33713c816dedSEric Whitney } 3372952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3373952fc18eSTheodore Ts'o smp_wmb(); 3374952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3375952fc18eSTheodore Ts'o return 0; 3376952fc18eSTheodore Ts'o } 3377952fc18eSTheodore Ts'o 3378b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 337927dd4385SLukas Czerner { 338027dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3381b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 338227dd4385SLukas Czerner 338327dd4385SLukas Czerner /* 338430fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 338530fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 338630fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 338730fac0f7SJan Kara * to keep ext2/3 backward compatibility. 338830fac0f7SJan Kara */ 3389e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3390b5799018STheodore Ts'o return; 339130fac0f7SJan Kara /* 339227dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 339327dd4385SLukas Czerner * This should cover the situations where we can not afford to run 339427dd4385SLukas Czerner * out of space like for example punch hole, or converting 3395556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 339627dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 339727dd4385SLukas Czerner * very rare. 339827dd4385SLukas Czerner */ 3399b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3400b5799018STheodore Ts'o sbi->s_cluster_bits); 340127dd4385SLukas Czerner 340227dd4385SLukas Czerner do_div(resv_clusters, 50); 340327dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 340427dd4385SLukas Czerner 3405b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 340627dd4385SLukas Czerner } 340727dd4385SLukas Czerner 3408617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3409ac27a0ecSDave Kleikamp { 34105e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 3411d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3412ac27a0ecSDave Kleikamp struct buffer_head *bh; 3413617ba13bSMingming Cao struct ext4_super_block *es = NULL; 34145aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3415617ba13bSMingming Cao ext4_fsblk_t block; 3416617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 341770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3418ac27a0ecSDave Kleikamp unsigned long offset = 0; 3419ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3420ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3421ac27a0ecSDave Kleikamp struct inode *root; 34220390131bSFrank Mayhar const char *descr; 3423dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3424281b5995STheodore Ts'o int blocksize, clustersize; 34254ec11028STheodore Ts'o unsigned int db_count; 34264ec11028STheodore Ts'o unsigned int i; 3427281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3428bd81d8eeSLaurent Vivier __u64 blocks_count; 342907aa2ea1SLukas Czerner int err = 0; 3430b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3431bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3432ac27a0ecSDave Kleikamp 34335aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 34345aee0f8aSTheodore Ts'o goto out_free_base; 3435705895b6SPekka Enberg 3436aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 3437705895b6SPekka Enberg sbi->s_blockgroup_lock = 3438705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 34395aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 34405aee0f8aSTheodore Ts'o goto out_free_base; 34415aee0f8aSTheodore Ts'o 3442ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34432c0544b2STheodore Ts'o sbi->s_sb = sb; 3444240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3445d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3446f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3447f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3448f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3449ac27a0ecSDave Kleikamp 34509f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3451ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 34529f6200bbSTheodore Ts'o 345307aa2ea1SLukas Czerner /* -EINVAL is default */ 3454dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3455617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3456ac27a0ecSDave Kleikamp if (!blocksize) { 3457b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3458ac27a0ecSDave Kleikamp goto out_fail; 3459ac27a0ecSDave Kleikamp } 3460ac27a0ecSDave Kleikamp 3461ac27a0ecSDave Kleikamp /* 3462617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3463ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3464ac27a0ecSDave Kleikamp */ 3465617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 346670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 346770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3468ac27a0ecSDave Kleikamp } else { 346970bbb3e0SAndrew Morton logical_sb_block = sb_block; 3470ac27a0ecSDave Kleikamp } 3471ac27a0ecSDave Kleikamp 3472a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3473b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3474ac27a0ecSDave Kleikamp goto out_fail; 3475ac27a0ecSDave Kleikamp } 3476ac27a0ecSDave Kleikamp /* 3477ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3478617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3479ac27a0ecSDave Kleikamp */ 34802716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3481ac27a0ecSDave Kleikamp sbi->s_es = es; 3482ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3483617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3484617ba13bSMingming Cao goto cantfind_ext4; 3485afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3486ac27a0ecSDave Kleikamp 3487feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3488e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3489e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3490363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3491feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3492feb0ab32SDarrick J. Wong 3493d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3494d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3495d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3496d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3497d25425f8SDarrick J. Wong silent = 1; 3498d25425f8SDarrick J. Wong goto cantfind_ext4; 3499d25425f8SDarrick J. Wong } 3500d25425f8SDarrick J. Wong 35010441984aSDarrick J. Wong /* Load the checksum driver */ 35020441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35030441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35040441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35050441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35060441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35070441984aSDarrick J. Wong goto failed_mount; 35080441984aSDarrick J. Wong } 35090441984aSDarrick J. Wong 3510a9c47317SDarrick J. Wong /* Check superblock checksum */ 3511a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3512a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3513a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3514a9c47317SDarrick J. Wong silent = 1; 35156a797d27SDarrick J. Wong ret = -EFSBADCRC; 3516a9c47317SDarrick J. Wong goto cantfind_ext4; 3517a9c47317SDarrick J. Wong } 3518a9c47317SDarrick J. Wong 3519a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3520e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 35218c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 3522dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 3523a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3524a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3525a9c47317SDarrick J. Wong 3526ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3527ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3528fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3529617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3530fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 353187f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3532fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3533617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3534fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3535ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3536fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 353703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3538fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35392e7842b8SHugh Dickins #endif 354098c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 354198c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 354298c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 354398c1a759SDarrick J. Wong 3544617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3545fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3546617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3547fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3548617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3549fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3550ac27a0ecSDave Kleikamp 3551617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3552fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3553bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3554fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3555bb4f397aSAneesh Kumar K.V else 3556fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 355745f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3558fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35598b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3560fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3561ac27a0ecSDave Kleikamp 356208cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 356308cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 356430773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 356530773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 356630773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3567ac27a0ecSDave Kleikamp 35688b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3569fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3570ac27a0ecSDave Kleikamp 35711e2462f9SMingming Cao /* 3572dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3573dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3574dd919b98SAneesh Kumar K.V */ 3575bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35768b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3577fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3578dd919b98SAneesh Kumar K.V 357951ce6511SLukas Czerner /* 358051ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 358151ce6511SLukas Czerner * no mount option specified. 358251ce6511SLukas Czerner */ 358351ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 358451ce6511SLukas Czerner 35855aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 35865aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 35875aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 35885aee0f8aSTheodore Ts'o GFP_KERNEL); 35895aee0f8aSTheodore Ts'o if (!s_mount_opts) 35905aee0f8aSTheodore Ts'o goto failed_mount; 35915aee0f8aSTheodore Ts'o if (!parse_options(s_mount_opts, sb, &journal_devnum, 35925aee0f8aSTheodore Ts'o &journal_ioprio, 0)) { 35938b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35948b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35955aee0f8aSTheodore Ts'o s_mount_opts); 35965aee0f8aSTheodore Ts'o } 35975aee0f8aSTheodore Ts'o kfree(s_mount_opts); 35988b67f04aSTheodore Ts'o } 35995a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3600b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3601661aa520SEric Sandeen &journal_ioprio, 0)) 3602ac27a0ecSDave Kleikamp goto failed_mount; 3603ac27a0ecSDave Kleikamp 360456889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 360556889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 360656889787STheodore Ts'o "with data=journal disables delayed " 360756889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 360856889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 360956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 361056889787STheodore Ts'o "both data=journal and delalloc"); 361156889787STheodore Ts'o goto failed_mount; 361256889787STheodore Ts'o } 361356889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 361456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 36156ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 361656889787STheodore Ts'o goto failed_mount; 361756889787STheodore Ts'o } 3618923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3619923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3620923ae0ffSRoss Zwisler "both data=journal and dax"); 3621923ae0ffSRoss Zwisler goto failed_mount; 3622923ae0ffSRoss Zwisler } 362373b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 362473b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 362573b92a2aSSergey Karamov "encrypted files will use data=ordered " 362673b92a2aSSergey Karamov "instead of data journaling mode"); 362773b92a2aSSergey Karamov } 362856889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 362956889787STheodore Ts'o clear_opt(sb, DELALLOC); 3630001e4a87STejun Heo } else { 3631001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 363256889787STheodore Ts'o } 363356889787STheodore Ts'o 36341751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 36351751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 3636ac27a0ecSDave Kleikamp 3637617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3638e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3639e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3640e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3641b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3642b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3643b31e1552SEric Sandeen "running e2fsck is recommended"); 3644469108ffSTheodore Tso 3645ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3646ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3647e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3648ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3649ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3650ed3654ebSTheodore Ts'o goto failed_mount; 3651ed3654ebSTheodore Ts'o } 3652dec214d0STahsin Erdogan 3653dec214d0STahsin Erdogan /* 3654dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 3655dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 3656dec214d0STahsin Erdogan */ 3657dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 3658dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 3659dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 3660dec214d0STahsin Erdogan goto failed_mount; 3661dec214d0STahsin Erdogan } 3662ed3654ebSTheodore Ts'o } 3663ed3654ebSTheodore Ts'o 36642035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36652035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36662035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36672035e776STheodore Ts'o "using the ext4 subsystem"); 36682035e776STheodore Ts'o else { 36690d9366d6SEric Sandeen /* 36700d9366d6SEric Sandeen * If we're probing be silent, if this looks like 36710d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 36720d9366d6SEric Sandeen */ 36730d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 36740d9366d6SEric Sandeen goto failed_mount; 36752035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36762035e776STheodore Ts'o "to feature incompatibilities"); 36772035e776STheodore Ts'o goto failed_mount; 36782035e776STheodore Ts'o } 36792035e776STheodore Ts'o } 36802035e776STheodore Ts'o 36812035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36822035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36832035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36842035e776STheodore Ts'o "using the ext4 subsystem"); 36852035e776STheodore Ts'o else { 36860d9366d6SEric Sandeen /* 36870d9366d6SEric Sandeen * If we're probing be silent, if this looks like 36880d9366d6SEric Sandeen * it's actually an ext4 filesystem. 36890d9366d6SEric Sandeen */ 36900d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 36910d9366d6SEric Sandeen goto failed_mount; 36922035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36932035e776STheodore Ts'o "to feature incompatibilities"); 36942035e776STheodore Ts'o goto failed_mount; 36952035e776STheodore Ts'o } 36962035e776STheodore Ts'o } 36972035e776STheodore Ts'o 3698469108ffSTheodore Tso /* 3699ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3700ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3701ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3702ac27a0ecSDave Kleikamp */ 3703bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 3704ac27a0ecSDave Kleikamp goto failed_mount; 3705a13fb1a4SEric Sandeen 3706261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3707617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3708617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3709b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 37108cdf3372STheodore Ts'o "Unsupported filesystem blocksize %d (%d log_block_size)", 37118cdf3372STheodore Ts'o blocksize, le32_to_cpu(es->s_log_block_size)); 37128cdf3372STheodore Ts'o goto failed_mount; 37138cdf3372STheodore Ts'o } 37148cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 37158cdf3372STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 37168cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 37178cdf3372STheodore Ts'o "Invalid log block size: %u", 37188cdf3372STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 3719ac27a0ecSDave Kleikamp goto failed_mount; 3720ac27a0ecSDave Kleikamp } 3721ac27a0ecSDave Kleikamp 37225b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 37235b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 37245b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 37255b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 37265b9554dcSTheodore Ts'o goto failed_mount; 37275b9554dcSTheodore Ts'o } 37285b9554dcSTheodore Ts'o 3729923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3730559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 3731559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 3732559db4c6SRoss Zwisler " that may contain inline data"); 373324f3478dSDan Williams sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; 3734559db4c6SRoss Zwisler } 373587eefeb4SToshi Kani err = bdev_dax_supported(sb, blocksize); 373624f3478dSDan Williams if (err) { 373724f3478dSDan Williams ext4_msg(sb, KERN_ERR, 373824f3478dSDan Williams "DAX unsupported by block device. Turning off DAX."); 373924f3478dSDan Williams sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; 374024f3478dSDan Williams } 3741923ae0ffSRoss Zwisler } 3742923ae0ffSRoss Zwisler 3743e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 37446ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 37456ddb2447STheodore Ts'o es->s_encryption_level); 37466ddb2447STheodore Ts'o goto failed_mount; 37476ddb2447STheodore Ts'o } 37486ddb2447STheodore Ts'o 3749ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3750ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3751ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3752b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3753ce40733cSAneesh Kumar K.V blocksize); 3754ac27a0ecSDave Kleikamp goto failed_mount; 3755ac27a0ecSDave Kleikamp } 3756ac27a0ecSDave Kleikamp 3757ac27a0ecSDave Kleikamp brelse(bh); 375870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 375970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3760a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3761ac27a0ecSDave Kleikamp if (!bh) { 3762b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3763b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3764ac27a0ecSDave Kleikamp goto failed_mount; 3765ac27a0ecSDave Kleikamp } 37662716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3767ac27a0ecSDave Kleikamp sbi->s_es = es; 3768617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3769b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3770b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3771ac27a0ecSDave Kleikamp goto failed_mount; 3772ac27a0ecSDave Kleikamp } 3773ac27a0ecSDave Kleikamp } 3774ac27a0ecSDave Kleikamp 3775e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3776f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3777f287a1a5STheodore Ts'o has_huge_files); 3778f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3779ac27a0ecSDave Kleikamp 3780617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3781617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3782617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3783ac27a0ecSDave Kleikamp } else { 3784ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3785ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3786617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37871330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3788ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3789b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3790b31e1552SEric Sandeen "unsupported inode size: %d", 3791ac27a0ecSDave Kleikamp sbi->s_inode_size); 3792ac27a0ecSDave Kleikamp goto failed_mount; 3793ac27a0ecSDave Kleikamp } 3794ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3795ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3796ac27a0ecSDave Kleikamp } 37970b8e58a1SAndreas Dilger 37980d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3799e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 38008fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 38010d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3802d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3803b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3804b31e1552SEric Sandeen "unsupported descriptor size %lu", 38050d1ee42fSAlexandre Ratchov sbi->s_desc_size); 38060d1ee42fSAlexandre Ratchov goto failed_mount; 38070d1ee42fSAlexandre Ratchov } 38080d1ee42fSAlexandre Ratchov } else 38090d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 38100b8e58a1SAndreas Dilger 3811ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3812ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 38130b8e58a1SAndreas Dilger 3814617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3815ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3816617ba13bSMingming Cao goto cantfind_ext4; 3817cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 3818cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 3819cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 3820cd6bb35bSTheodore Ts'o sbi->s_blocks_per_group); 3821cd6bb35bSTheodore Ts'o goto failed_mount; 3822cd6bb35bSTheodore Ts'o } 3823ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3824ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 38250d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3826ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3827ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3828e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3829e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 38300b8e58a1SAndreas Dilger 3831ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3832ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3833ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3834e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3835f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3836f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3837f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3838f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3839f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3840bc98a42cSDavid Howells if (!sb_rdonly(sb)) 384123301410STheodore Ts'o es->s_flags |= 384223301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3843f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3844f99b2589STheodore Ts'o #else 3845bc98a42cSDavid Howells if (!sb_rdonly(sb)) 384623301410STheodore Ts'o es->s_flags |= 384723301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3848f99b2589STheodore Ts'o #endif 3849f99b2589STheodore Ts'o } 385023301410STheodore Ts'o } 3851ac27a0ecSDave Kleikamp 3852281b5995STheodore Ts'o /* Handle clustersize */ 3853281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3854e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3855281b5995STheodore Ts'o if (has_bigalloc) { 3856281b5995STheodore Ts'o if (clustersize < blocksize) { 3857281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3858281b5995STheodore Ts'o "cluster size (%d) smaller than " 3859281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3860281b5995STheodore Ts'o goto failed_mount; 3861281b5995STheodore Ts'o } 38628cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 38638cdf3372STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 38648cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 38658cdf3372STheodore Ts'o "Invalid log cluster size: %u", 38668cdf3372STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 38678cdf3372STheodore Ts'o goto failed_mount; 38688cdf3372STheodore Ts'o } 3869281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3870281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3871281b5995STheodore Ts'o sbi->s_clusters_per_group = 3872281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3873281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3874281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3875281b5995STheodore Ts'o "#clusters per group too big: %lu", 3876281b5995STheodore Ts'o sbi->s_clusters_per_group); 3877281b5995STheodore Ts'o goto failed_mount; 3878281b5995STheodore Ts'o } 3879281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3880281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3881281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3882281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3883281b5995STheodore Ts'o sbi->s_blocks_per_group, 3884281b5995STheodore Ts'o sbi->s_clusters_per_group); 3885281b5995STheodore Ts'o goto failed_mount; 3886281b5995STheodore Ts'o } 3887281b5995STheodore Ts'o } else { 3888281b5995STheodore Ts'o if (clustersize != blocksize) { 3889281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3890281b5995STheodore Ts'o "block size (%d)", clustersize, 3891281b5995STheodore Ts'o blocksize); 3892281b5995STheodore Ts'o clustersize = blocksize; 3893281b5995STheodore Ts'o } 3894ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3895b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3896b31e1552SEric Sandeen "#blocks per group too big: %lu", 3897ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3898ac27a0ecSDave Kleikamp goto failed_mount; 3899ac27a0ecSDave Kleikamp } 3900281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3901281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3902281b5995STheodore Ts'o } 3903281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3904281b5995STheodore Ts'o 3905960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3906960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3907960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3908960fd856STheodore Ts'o 3909bf43d84bSEric Sandeen /* 3910bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3911bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3912bf43d84bSEric Sandeen */ 39135a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 391430ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 39155a9ae68aSDarrick J. Wong if (err) { 3916b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3917bf43d84bSEric Sandeen " too large to mount safely on this system"); 3918ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 391990c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3920ac27a0ecSDave Kleikamp goto failed_mount; 3921ac27a0ecSDave Kleikamp } 3922ac27a0ecSDave Kleikamp 3923617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3924617ba13bSMingming Cao goto cantfind_ext4; 3925e7c95593SEric Sandeen 39260f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 39270f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 39280f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3929b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3930b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 39310f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 39320f2ddca6SFrom: Thiemo Nagel goto failed_mount; 39330f2ddca6SFrom: Thiemo Nagel } 39340f2ddca6SFrom: Thiemo Nagel 39354ec11028STheodore Ts'o /* 39364ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 39374ec11028STheodore Ts'o * of the filesystem. 39384ec11028STheodore Ts'o */ 39394ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3940b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3941b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3942e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 39434ec11028STheodore Ts'o ext4_blocks_count(es)); 3944e7c95593SEric Sandeen goto failed_mount; 3945e7c95593SEric Sandeen } 3946bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3947bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3948bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3949bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 39504ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3951b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 39524ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3953b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 39544ec11028STheodore Ts'o ext4_blocks_count(es), 39554ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 39564ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 39574ec11028STheodore Ts'o goto failed_mount; 39584ec11028STheodore Ts'o } 3959bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3960fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3961fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3962617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3963617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 39643a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 39652ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 39663a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 39673a4b77cdSEryu Guan "first meta block group too large: %u " 39683a4b77cdSEryu Guan "(group descriptor block count %u)", 39693a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 39703a4b77cdSEryu Guan goto failed_mount; 39713a4b77cdSEryu Guan } 39723a4b77cdSEryu Guan } 3973a7c3e901SMichal Hocko sbi->s_group_desc = kvmalloc(db_count * 3974f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3975ac27a0ecSDave Kleikamp GFP_KERNEL); 3976ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3977b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 39782cde417dSTheodore Ts'o ret = -ENOMEM; 3979ac27a0ecSDave Kleikamp goto failed_mount; 3980ac27a0ecSDave Kleikamp } 3981ac27a0ecSDave Kleikamp 3982705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3983ac27a0ecSDave Kleikamp 398485c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 398585c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 398685c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 398785c8f176SAndrew Perepechko sb_breadahead(sb, block); 398885c8f176SAndrew Perepechko } 398985c8f176SAndrew Perepechko 3990ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 399170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3992a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3993ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3994b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3995b31e1552SEric Sandeen "can't read group descriptor %d", i); 3996ac27a0ecSDave Kleikamp db_count = i; 3997ac27a0ecSDave Kleikamp goto failed_mount2; 3998ac27a0ecSDave Kleikamp } 3999ac27a0ecSDave Kleikamp } 4000829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4001b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 40026a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4003f9ae9cf5STheodore Ts'o goto failed_mount2; 4004ac27a0ecSDave Kleikamp } 4005772cb7c8SJose R. Santos 4006f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 4007ac27a0ecSDave Kleikamp 4008235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 400904496411STao Ma 4010a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4011eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4012ce7e010aSTheodore Ts'o goto failed_mount3; 4013ce7e010aSTheodore Ts'o 4014c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 401567a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4016c9de560dSAlex Tomas 4017f9ae9cf5STheodore Ts'o /* 4018f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4019f9ae9cf5STheodore Ts'o */ 4020f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4021617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4022617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4023ffcc4182SEric Biggers #ifdef CONFIG_EXT4_FS_ENCRYPTION 4024a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4025ffcc4182SEric Biggers #endif 4026ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4027617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4028e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 40291fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4030262b4662SJan Kara else 4031262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4032689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4033ac27a0ecSDave Kleikamp #endif 403485787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4035f2fa2ffcSAneesh Kumar K.V 4036ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 40373b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4038ac27a0ecSDave Kleikamp 4039ac27a0ecSDave Kleikamp sb->s_root = NULL; 4040ac27a0ecSDave Kleikamp 4041ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 4042e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4043ac27a0ecSDave Kleikamp 4044bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4045c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 404650460fe8SDarrick J. Wong goto failed_mount3a; 4047c5e06d10SJohann Lombardi 4048ac27a0ecSDave Kleikamp /* 4049ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4050ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4051ac27a0ecSDave Kleikamp */ 4052e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 40534753d8a2STheodore Ts'o err = ext4_load_journal(sb, es, journal_devnum); 40544753d8a2STheodore Ts'o if (err) 405550460fe8SDarrick J. Wong goto failed_mount3a; 4056bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4057e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4058b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4059b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4060744692dcSJiaying Zhang goto failed_mount_wq; 4061ac27a0ecSDave Kleikamp } else { 40621e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 40631e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 40641e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 40651e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 40661e381f60SDmitry Monakhov goto failed_mount_wq; 40671e381f60SDmitry Monakhov } 40681e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 40691e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 40701e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 40711e381f60SDmitry Monakhov goto failed_mount_wq; 40721e381f60SDmitry Monakhov } 40731e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 40741e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 40751e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 40761e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 40771e381f60SDmitry Monakhov goto failed_mount_wq; 40781e381f60SDmitry Monakhov } 40791e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 40801e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 40811e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 40821e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 40831e381f60SDmitry Monakhov goto failed_mount_wq; 40841e381f60SDmitry Monakhov } 40851e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 40861e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4087fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 40880390131bSFrank Mayhar sbi->s_journal = NULL; 40890390131bSFrank Mayhar needs_recovery = 0; 40900390131bSFrank Mayhar goto no_journal; 4091ac27a0ecSDave Kleikamp } 4092ac27a0ecSDave Kleikamp 4093e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4094eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4095eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4096b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4097744692dcSJiaying Zhang goto failed_mount_wq; 4098eb40a09cSJose R. Santos } 4099eb40a09cSJose R. Santos 410025ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 410125ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 410225ed6e8aSDarrick J. Wong "feature set"); 410325ed6e8aSDarrick J. Wong goto failed_mount_wq; 4104d4da6c9cSLinus Torvalds } 4105818d276cSGirish Shilamkar 4106ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4107ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4108ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4109ac27a0ecSDave Kleikamp case 0: 4110ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 411163f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 411263f57933SAndrew Morton * cope, else JOURNAL_DATA 411363f57933SAndrew Morton */ 4114dab291afSMingming Cao if (jbd2_journal_check_available_features 4115dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4116fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4117ac27a0ecSDave Kleikamp else 4118fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4119ac27a0ecSDave Kleikamp break; 4120ac27a0ecSDave Kleikamp 4121617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4122617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4123dab291afSMingming Cao if (!jbd2_journal_check_available_features 4124dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4125b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4126b31e1552SEric Sandeen "requested data journaling mode"); 4127744692dcSJiaying Zhang goto failed_mount_wq; 4128ac27a0ecSDave Kleikamp } 4129ac27a0ecSDave Kleikamp default: 4130ac27a0ecSDave Kleikamp break; 4131ac27a0ecSDave Kleikamp } 4132ab04df78SJan Kara 4133ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4134ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4135ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4136ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4137ab04df78SJan Kara goto failed_mount_wq; 4138ab04df78SJan Kara } 4139ab04df78SJan Kara 4140b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4141ac27a0ecSDave Kleikamp 414218aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 414318aadd47SBobi Jam 4144ce7e010aSTheodore Ts'o no_journal: 4145cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 414647387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 414747387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4148cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4149cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 41509c191f70ST Makphaibulchoke goto failed_mount_wq; 41519c191f70ST Makphaibulchoke } 41529c191f70ST Makphaibulchoke 4153dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4154dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4155dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4156dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4157dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4158dec214d0STahsin Erdogan goto failed_mount_wq; 4159dec214d0STahsin Erdogan } 4160dec214d0STahsin Erdogan } 4161cdb7ee4cSTahsin Erdogan } 4162dec214d0STahsin Erdogan 4163e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 416409cbfeafSKirill A. Shutemov (blocksize != PAGE_SIZE)) { 41651cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 41661cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 41671cb767cdSTheodore Ts'o goto failed_mount_wq; 41681cb767cdSTheodore Ts'o } 41691cb767cdSTheodore Ts'o 4170bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4171e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4172e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 41736ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 41746ddb2447STheodore Ts'o } 41756ddb2447STheodore Ts'o 4176fd89d5f2STejun Heo /* 4177952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4178952fc18eSTheodore Ts'o * superblock if present. 4179952fc18eSTheodore Ts'o */ 4180952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4181952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4182952fc18eSTheodore Ts'o else { 418307aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 418407aa2ea1SLukas Czerner if (err) 4185952fc18eSTheodore Ts'o goto failed_mount_wq; 4186952fc18eSTheodore Ts'o } 4187952fc18eSTheodore Ts'o 4188952fc18eSTheodore Ts'o /* 4189fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4190fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4191fd89d5f2STejun Heo */ 41922e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 41932e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 41942e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 41952e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 419607aa2ea1SLukas Czerner ret = -ENOMEM; 41972e8fa54eSJan Kara goto failed_mount4; 41982e8fa54eSJan Kara } 41992e8fa54eSJan Kara 4200ac27a0ecSDave Kleikamp /* 4201dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4202ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4203ac27a0ecSDave Kleikamp */ 4204ac27a0ecSDave Kleikamp 42051d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 42061d1fe1eeSDavid Howells if (IS_ERR(root)) { 4207b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 42081d1fe1eeSDavid Howells ret = PTR_ERR(root); 420932a9bb57SManish Katiyar root = NULL; 4210ac27a0ecSDave Kleikamp goto failed_mount4; 4211ac27a0ecSDave Kleikamp } 4212ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4213b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 421494bf608aSAl Viro iput(root); 4215ac27a0ecSDave Kleikamp goto failed_mount4; 4216ac27a0ecSDave Kleikamp } 421748fde701SAl Viro sb->s_root = d_make_root(root); 42181d1fe1eeSDavid Howells if (!sb->s_root) { 4219b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 42201d1fe1eeSDavid Howells ret = -ENOMEM; 42211d1fe1eeSDavid Howells goto failed_mount4; 42221d1fe1eeSDavid Howells } 4223ac27a0ecSDave Kleikamp 4224bc98a42cSDavid Howells if (ext4_setup_super(sb, es, sb_rdonly(sb))) 42251751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 4226ef7f3835SKalpak Shah 4227ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4228670e9875STheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE && 4229670e9875STheodore Ts'o sbi->s_want_extra_isize == 0) { 4230ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4231ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4232e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 4233ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4234ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4235ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4236ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4237ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4238ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4239ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4240ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4241ef7f3835SKalpak Shah } 4242ef7f3835SKalpak Shah } 4243ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4244ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4245ef7f3835SKalpak Shah sbi->s_inode_size) { 4246ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4247ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4248b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4249b31e1552SEric Sandeen "available"); 4250ef7f3835SKalpak Shah } 4251ef7f3835SKalpak Shah 4252b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 425327dd4385SLukas Czerner 42546fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 42556fd058f7STheodore Ts'o if (err) { 4256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4257fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4258f9ae9cf5STheodore Ts'o goto failed_mount4a; 4259f9ae9cf5STheodore Ts'o } 4260f9ae9cf5STheodore Ts'o 4261f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4262f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4263f9ae9cf5STheodore Ts'o if (err) { 4264f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4265f9ae9cf5STheodore Ts'o err); 4266dcf2d804STao Ma goto failed_mount5; 4267c2774d84SAneesh Kumar K.V } 4268c2774d84SAneesh Kumar K.V 4269d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4270d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4271d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4272908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4273908c7f19STejun Heo GFP_KERNEL); 4274d5e03cbbSTheodore Ts'o if (!err) { 4275d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4276d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4277908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4278908c7f19STejun Heo GFP_KERNEL); 4279d5e03cbbSTheodore Ts'o } 4280d5e03cbbSTheodore Ts'o if (!err) 4281d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4282908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4283d5e03cbbSTheodore Ts'o if (!err) 4284908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4285908c7f19STejun Heo GFP_KERNEL); 4286c8585c6fSDaeho Jeong if (!err) 4287c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4288c8585c6fSDaeho Jeong 4289d5e03cbbSTheodore Ts'o if (err) { 4290d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4291d5e03cbbSTheodore Ts'o goto failed_mount6; 4292d5e03cbbSTheodore Ts'o } 4293d5e03cbbSTheodore Ts'o 4294e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4295d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4296d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4297d5e03cbbSTheodore Ts'o "unable to initialize " 4298d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4299d5e03cbbSTheodore Ts'o goto failed_mount6; 4300d5e03cbbSTheodore Ts'o } 4301d5e03cbbSTheodore Ts'o 4302bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4303bfff6873SLukas Czerner if (err) 4304dcf2d804STao Ma goto failed_mount6; 4305bfff6873SLukas Czerner 4306b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4307dcf2d804STao Ma if (err) 4308dcf2d804STao Ma goto failed_mount7; 43093197ebdbSTheodore Ts'o 43109b2ff357SJan Kara #ifdef CONFIG_QUOTA 43119b2ff357SJan Kara /* Enable quota usage during mount. */ 4312bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 43139b2ff357SJan Kara err = ext4_enable_quotas(sb); 43149b2ff357SJan Kara if (err) 43159b2ff357SJan Kara goto failed_mount8; 43169b2ff357SJan Kara } 43179b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 43189b2ff357SJan Kara 4319617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4320617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4321617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 43220390131bSFrank Mayhar if (needs_recovery) { 4323b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4324617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 43250390131bSFrank Mayhar } 43260390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 43270390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 43280390131bSFrank Mayhar descr = " journalled data mode"; 43290390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 43300390131bSFrank Mayhar descr = " ordered data mode"; 43310390131bSFrank Mayhar else 43320390131bSFrank Mayhar descr = " writeback data mode"; 43330390131bSFrank Mayhar } else 43340390131bSFrank Mayhar descr = "out journal"; 43350390131bSFrank Mayhar 433679add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 433779add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 433879add3a3SLukas Czerner if (!blk_queue_discard(q)) 433979add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 434079add3a3SLukas Czerner "mounting with \"discard\" option, but " 434179add3a3SLukas Czerner "the device does not support discard"); 434279add3a3SLukas Czerner } 434379add3a3SLukas Czerner 4344e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4345d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 43465aee0f8aSTheodore Ts'o "Opts: %.*s%s%s", descr, 43475aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 43485aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 43498b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4350ac27a0ecSDave Kleikamp 435166e61a9eSTheodore Ts'o if (es->s_error_count) 435266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4353ac27a0ecSDave Kleikamp 4354efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4355efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4356efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4357efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4358efbed4dcSTheodore Ts'o 4359d4c402d9SCurt Wohlgemuth kfree(orig_data); 4360ac27a0ecSDave Kleikamp return 0; 4361ac27a0ecSDave Kleikamp 4362617ba13bSMingming Cao cantfind_ext4: 4363ac27a0ecSDave Kleikamp if (!silent) 4364b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4365ac27a0ecSDave Kleikamp goto failed_mount; 4366ac27a0ecSDave Kleikamp 436772ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 436872ba7450STheodore Ts'o failed_mount8: 4369ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 437072ba7450STheodore Ts'o #endif 4371dcf2d804STao Ma failed_mount7: 4372dcf2d804STao Ma ext4_unregister_li_request(sb); 4373dcf2d804STao Ma failed_mount6: 4374f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4375d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4376b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4377d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4378d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4379d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4380d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 438100764937SAzat Khuzhin failed_mount5: 4382f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4383f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4384f9ae9cf5STheodore Ts'o failed_mount4a: 438594bf608aSAl Viro dput(sb->s_root); 438632a9bb57SManish Katiyar sb->s_root = NULL; 438794bf608aSAl Viro failed_mount4: 4388b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 43892e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 43902e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 43914c0425ffSMingming Cao failed_mount_wq: 4392dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 4393dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 4394dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 4395dec214d0STahsin Erdogan } 439647387409STahsin Erdogan if (sbi->s_ea_block_cache) { 439747387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 439847387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 439982939d79SJan Kara } 44000390131bSFrank Mayhar if (sbi->s_journal) { 4401dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 440247b4a50bSJan Kara sbi->s_journal = NULL; 44030390131bSFrank Mayhar } 440450460fe8SDarrick J. Wong failed_mount3a: 4405d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4406eb68d0e2SZheng Liu failed_mount3: 44079105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4408c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4409c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4410ac27a0ecSDave Kleikamp failed_mount2: 4411ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4412ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4413b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4414ac27a0ecSDave Kleikamp failed_mount: 44150441984aSDarrick J. Wong if (sbi->s_chksum_driver) 44160441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4417ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4418a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4419ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4420ac27a0ecSDave Kleikamp #endif 4421617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4422ac27a0ecSDave Kleikamp brelse(bh); 4423ac27a0ecSDave Kleikamp out_fail: 4424ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4425f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 44265aee0f8aSTheodore Ts'o out_free_base: 4427ac27a0ecSDave Kleikamp kfree(sbi); 4428d4c402d9SCurt Wohlgemuth kfree(orig_data); 44295e405595SDan Williams fs_put_dax(dax_dev); 443007aa2ea1SLukas Czerner return err ? err : ret; 4431ac27a0ecSDave Kleikamp } 4432ac27a0ecSDave Kleikamp 4433ac27a0ecSDave Kleikamp /* 4434ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4435ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4436ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4437ac27a0ecSDave Kleikamp */ 4438617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4439ac27a0ecSDave Kleikamp { 4440617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4441ac27a0ecSDave Kleikamp 4442ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 444330773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 444430773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4445ac27a0ecSDave Kleikamp 4446a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4447ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4448dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4449ac27a0ecSDave Kleikamp else 4450dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 44515bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 44525bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 44535bf5683aSHidehiro Kawai else 44545bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4455a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4456ac27a0ecSDave Kleikamp } 4457ac27a0ecSDave Kleikamp 4458c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 4459ac27a0ecSDave Kleikamp unsigned int journal_inum) 4460ac27a0ecSDave Kleikamp { 4461ac27a0ecSDave Kleikamp struct inode *journal_inode; 4462ac27a0ecSDave Kleikamp 4463c6cb7e77SEric Whitney /* 4464c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 4465c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 4466c6cb7e77SEric Whitney * will try to delete it. 4467c6cb7e77SEric Whitney */ 44681d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 44691d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4470b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4471ac27a0ecSDave Kleikamp return NULL; 4472ac27a0ecSDave Kleikamp } 4473ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4474ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4475ac27a0ecSDave Kleikamp iput(journal_inode); 4476b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4477ac27a0ecSDave Kleikamp return NULL; 4478ac27a0ecSDave Kleikamp } 4479ac27a0ecSDave Kleikamp 4480e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4481ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 44821d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4483b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4484ac27a0ecSDave Kleikamp iput(journal_inode); 4485ac27a0ecSDave Kleikamp return NULL; 4486ac27a0ecSDave Kleikamp } 4487c6cb7e77SEric Whitney return journal_inode; 4488c6cb7e77SEric Whitney } 4489c6cb7e77SEric Whitney 4490c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 4491c6cb7e77SEric Whitney unsigned int journal_inum) 4492c6cb7e77SEric Whitney { 4493c6cb7e77SEric Whitney struct inode *journal_inode; 4494c6cb7e77SEric Whitney journal_t *journal; 4495c6cb7e77SEric Whitney 4496c6cb7e77SEric Whitney BUG_ON(!ext4_has_feature_journal(sb)); 4497c6cb7e77SEric Whitney 4498c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 4499c6cb7e77SEric Whitney if (!journal_inode) 4500c6cb7e77SEric Whitney return NULL; 4501ac27a0ecSDave Kleikamp 4502dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4503ac27a0ecSDave Kleikamp if (!journal) { 4504b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4505ac27a0ecSDave Kleikamp iput(journal_inode); 4506ac27a0ecSDave Kleikamp return NULL; 4507ac27a0ecSDave Kleikamp } 4508ac27a0ecSDave Kleikamp journal->j_private = sb; 4509617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4510ac27a0ecSDave Kleikamp return journal; 4511ac27a0ecSDave Kleikamp } 4512ac27a0ecSDave Kleikamp 4513617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4514ac27a0ecSDave Kleikamp dev_t j_dev) 4515ac27a0ecSDave Kleikamp { 4516ac27a0ecSDave Kleikamp struct buffer_head *bh; 4517ac27a0ecSDave Kleikamp journal_t *journal; 4518617ba13bSMingming Cao ext4_fsblk_t start; 4519617ba13bSMingming Cao ext4_fsblk_t len; 4520ac27a0ecSDave Kleikamp int hblock, blocksize; 4521617ba13bSMingming Cao ext4_fsblk_t sb_block; 4522ac27a0ecSDave Kleikamp unsigned long offset; 4523617ba13bSMingming Cao struct ext4_super_block *es; 4524ac27a0ecSDave Kleikamp struct block_device *bdev; 4525ac27a0ecSDave Kleikamp 4526e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 45270390131bSFrank Mayhar 4528b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4529ac27a0ecSDave Kleikamp if (bdev == NULL) 4530ac27a0ecSDave Kleikamp return NULL; 4531ac27a0ecSDave Kleikamp 4532ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4533e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4534ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4535b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4536b31e1552SEric Sandeen "blocksize too small for journal device"); 4537ac27a0ecSDave Kleikamp goto out_bdev; 4538ac27a0ecSDave Kleikamp } 4539ac27a0ecSDave Kleikamp 4540617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4541617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4542ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4543ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4544b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4545b31e1552SEric Sandeen "external journal"); 4546ac27a0ecSDave Kleikamp goto out_bdev; 4547ac27a0ecSDave Kleikamp } 4548ac27a0ecSDave Kleikamp 45492716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4550617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4551ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4552617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4553b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4554b31e1552SEric Sandeen "bad superblock"); 4555ac27a0ecSDave Kleikamp brelse(bh); 4556ac27a0ecSDave Kleikamp goto out_bdev; 4557ac27a0ecSDave Kleikamp } 4558ac27a0ecSDave Kleikamp 4559df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4560df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4561df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4562df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4563df4763beSDarrick J. Wong "corrupt superblock"); 4564df4763beSDarrick J. Wong brelse(bh); 4565df4763beSDarrick J. Wong goto out_bdev; 4566df4763beSDarrick J. Wong } 4567df4763beSDarrick J. Wong 4568617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4569b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4570ac27a0ecSDave Kleikamp brelse(bh); 4571ac27a0ecSDave Kleikamp goto out_bdev; 4572ac27a0ecSDave Kleikamp } 4573ac27a0ecSDave Kleikamp 4574bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4575ac27a0ecSDave Kleikamp start = sb_block + 1; 4576ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4577ac27a0ecSDave Kleikamp 4578dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4579ac27a0ecSDave Kleikamp start, len, blocksize); 4580ac27a0ecSDave Kleikamp if (!journal) { 4581b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4582ac27a0ecSDave Kleikamp goto out_bdev; 4583ac27a0ecSDave Kleikamp } 4584ac27a0ecSDave Kleikamp journal->j_private = sb; 4585dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4586ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4587ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4588b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4589ac27a0ecSDave Kleikamp goto out_journal; 4590ac27a0ecSDave Kleikamp } 4591ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4592b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4593b31e1552SEric Sandeen "user (unsupported) - %d", 4594ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4595ac27a0ecSDave Kleikamp goto out_journal; 4596ac27a0ecSDave Kleikamp } 4597617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4598617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4599ac27a0ecSDave Kleikamp return journal; 46000b8e58a1SAndreas Dilger 4601ac27a0ecSDave Kleikamp out_journal: 4602dab291afSMingming Cao jbd2_journal_destroy(journal); 4603ac27a0ecSDave Kleikamp out_bdev: 4604617ba13bSMingming Cao ext4_blkdev_put(bdev); 4605ac27a0ecSDave Kleikamp return NULL; 4606ac27a0ecSDave Kleikamp } 4607ac27a0ecSDave Kleikamp 4608617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4609617ba13bSMingming Cao struct ext4_super_block *es, 4610ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4611ac27a0ecSDave Kleikamp { 4612ac27a0ecSDave Kleikamp journal_t *journal; 4613ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4614ac27a0ecSDave Kleikamp dev_t journal_dev; 4615ac27a0ecSDave Kleikamp int err = 0; 4616ac27a0ecSDave Kleikamp int really_read_only; 4617ac27a0ecSDave Kleikamp 4618e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 46190390131bSFrank Mayhar 4620ac27a0ecSDave Kleikamp if (journal_devnum && 4621ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4622b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4623b31e1552SEric Sandeen "numbers have changed"); 4624ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4625ac27a0ecSDave Kleikamp } else 4626ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4627ac27a0ecSDave Kleikamp 4628ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4629ac27a0ecSDave Kleikamp 4630ac27a0ecSDave Kleikamp /* 4631ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4632ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4633ac27a0ecSDave Kleikamp * can get read-write access to the device. 4634ac27a0ecSDave Kleikamp */ 4635e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4636bc98a42cSDavid Howells if (sb_rdonly(sb)) { 4637b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4638b31e1552SEric Sandeen "required on readonly filesystem"); 4639ac27a0ecSDave Kleikamp if (really_read_only) { 4640b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4641d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 4642d98bf8cdSSimon Ruderich "(try mounting with noload)"); 4643ac27a0ecSDave Kleikamp return -EROFS; 4644ac27a0ecSDave Kleikamp } 4645b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4646b31e1552SEric Sandeen "be enabled during recovery"); 4647ac27a0ecSDave Kleikamp } 4648ac27a0ecSDave Kleikamp } 4649ac27a0ecSDave Kleikamp 4650ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4651b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4652b31e1552SEric Sandeen "and inode journals!"); 4653ac27a0ecSDave Kleikamp return -EINVAL; 4654ac27a0ecSDave Kleikamp } 4655ac27a0ecSDave Kleikamp 4656ac27a0ecSDave Kleikamp if (journal_inum) { 4657617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4658ac27a0ecSDave Kleikamp return -EINVAL; 4659ac27a0ecSDave Kleikamp } else { 4660617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4661ac27a0ecSDave Kleikamp return -EINVAL; 4662ac27a0ecSDave Kleikamp } 4663ac27a0ecSDave Kleikamp 466490576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4665b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 46664776004fSTheodore Ts'o 4667e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4668dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 46691c13d5c0STheodore Ts'o if (!err) { 46701c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 46711c13d5c0STheodore Ts'o if (save) 46721c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 46731c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4674dab291afSMingming Cao err = jbd2_journal_load(journal); 46751c13d5c0STheodore Ts'o if (save) 46761c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 46771c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 46781c13d5c0STheodore Ts'o kfree(save); 46791c13d5c0STheodore Ts'o } 4680ac27a0ecSDave Kleikamp 4681ac27a0ecSDave Kleikamp if (err) { 4682b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4683dab291afSMingming Cao jbd2_journal_destroy(journal); 4684ac27a0ecSDave Kleikamp return err; 4685ac27a0ecSDave Kleikamp } 4686ac27a0ecSDave Kleikamp 4687617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4688617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4689ac27a0ecSDave Kleikamp 4690c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4691ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4692ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4693ac27a0ecSDave Kleikamp 4694ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4695e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4696ac27a0ecSDave Kleikamp } 4697ac27a0ecSDave Kleikamp 4698ac27a0ecSDave Kleikamp return 0; 4699ac27a0ecSDave Kleikamp } 4700ac27a0ecSDave Kleikamp 4701e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4702ac27a0ecSDave Kleikamp { 4703e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4704617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4705c4be0c1dSTakashi Sato int error = 0; 4706ac27a0ecSDave Kleikamp 4707bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4708c4be0c1dSTakashi Sato return error; 470971290b36STheodore Ts'o /* 471071290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 471171290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 471271290b36STheodore Ts'o * write time when we are mounting the root file system 471371290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 471471290b36STheodore Ts'o * for people who are east of GMT and who make their clock 471571290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 471671290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 471771290b36STheodore Ts'o * to complain and force a full file system check. 471871290b36STheodore Ts'o */ 47191751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 4720ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4721f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4722afc32f7eSTheodore Ts'o es->s_kbytes_written = 4723afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4724afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4725afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4726f613dfcbSTheodore Ts'o else 4727f613dfcbSTheodore Ts'o es->s_kbytes_written = 4728f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4729d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 473057042651STheodore Ts'o ext4_free_blocks_count_set(es, 473157042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 473257042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4733d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 47347f93cff9STheodore Ts'o es->s_free_inodes_count = 47357f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 47365d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4737ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 473806db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 47391566a48aSTheodore Ts'o if (sync) 47404743f839SPranay Kr. Srivastava lock_buffer(sbh); 47414743f839SPranay Kr. Srivastava if (buffer_write_io_error(sbh)) { 47424743f839SPranay Kr. Srivastava /* 47434743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 47444743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 47454743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 47464743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 47474743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 47484743f839SPranay Kr. Srivastava * write and hope for the best. 47494743f839SPranay Kr. Srivastava */ 47504743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 47514743f839SPranay Kr. Srivastava "superblock detected"); 47524743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 47534743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 47544743f839SPranay Kr. Srivastava } 4755ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4756914258bfSTheodore Ts'o if (sync) { 47571566a48aSTheodore Ts'o unlock_buffer(sbh); 4758564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 475900473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 4760c4be0c1dSTakashi Sato if (error) 4761c4be0c1dSTakashi Sato return error; 4762c4be0c1dSTakashi Sato 4763c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4764c4be0c1dSTakashi Sato if (error) { 4765b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4766b31e1552SEric Sandeen "superblock"); 4767914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4768914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4769914258bfSTheodore Ts'o } 4770914258bfSTheodore Ts'o } 4771c4be0c1dSTakashi Sato return error; 4772ac27a0ecSDave Kleikamp } 4773ac27a0ecSDave Kleikamp 4774ac27a0ecSDave Kleikamp /* 4775ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4776ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4777ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4778ac27a0ecSDave Kleikamp */ 4779617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4780617ba13bSMingming Cao struct ext4_super_block *es) 4781ac27a0ecSDave Kleikamp { 4782617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4783ac27a0ecSDave Kleikamp 4784e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 47850390131bSFrank Mayhar BUG_ON(journal != NULL); 47860390131bSFrank Mayhar return; 47870390131bSFrank Mayhar } 4788dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47897ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 47907ffe1ea8SHidehiro Kawai goto out; 47917ffe1ea8SHidehiro Kawai 4792bc98a42cSDavid Howells if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) { 4793e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4794e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4795ac27a0ecSDave Kleikamp } 47967ffe1ea8SHidehiro Kawai 47977ffe1ea8SHidehiro Kawai out: 4798dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4799ac27a0ecSDave Kleikamp } 4800ac27a0ecSDave Kleikamp 4801ac27a0ecSDave Kleikamp /* 4802ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4803ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4804ac27a0ecSDave Kleikamp * main filesystem now. 4805ac27a0ecSDave Kleikamp */ 4806617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4807617ba13bSMingming Cao struct ext4_super_block *es) 4808ac27a0ecSDave Kleikamp { 4809ac27a0ecSDave Kleikamp journal_t *journal; 4810ac27a0ecSDave Kleikamp int j_errno; 4811ac27a0ecSDave Kleikamp const char *errstr; 4812ac27a0ecSDave Kleikamp 4813e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 48140390131bSFrank Mayhar 4815617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4816ac27a0ecSDave Kleikamp 4817ac27a0ecSDave Kleikamp /* 4818ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4819617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4820ac27a0ecSDave Kleikamp */ 4821ac27a0ecSDave Kleikamp 4822dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4823ac27a0ecSDave Kleikamp if (j_errno) { 4824ac27a0ecSDave Kleikamp char nbuf[16]; 4825ac27a0ecSDave Kleikamp 4826617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 482712062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4828ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 482912062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4830ac27a0ecSDave Kleikamp 4831617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4832617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4833e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4834ac27a0ecSDave Kleikamp 4835dab291afSMingming Cao jbd2_journal_clear_err(journal); 4836d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4837ac27a0ecSDave Kleikamp } 4838ac27a0ecSDave Kleikamp } 4839ac27a0ecSDave Kleikamp 4840ac27a0ecSDave Kleikamp /* 4841ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4842ac27a0ecSDave Kleikamp * and wait on the commit. 4843ac27a0ecSDave Kleikamp */ 4844617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4845ac27a0ecSDave Kleikamp { 4846ac27a0ecSDave Kleikamp journal_t *journal; 4847ac27a0ecSDave Kleikamp 4848bc98a42cSDavid Howells if (sb_rdonly(sb)) 4849ac27a0ecSDave Kleikamp return 0; 4850ac27a0ecSDave Kleikamp 4851617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4852b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4853ac27a0ecSDave Kleikamp } 4854ac27a0ecSDave Kleikamp 4855617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4856ac27a0ecSDave Kleikamp { 485714ce0cb4STheodore Ts'o int ret = 0; 48589eddacf9SJan Kara tid_t target; 485906a407f1SDmitry Monakhov bool needs_barrier = false; 48608d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4861ac27a0ecSDave Kleikamp 486249598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 48630db1ff22STheodore Ts'o return 0; 48640db1ff22STheodore Ts'o 48659bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 48662e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4867a1177825SJan Kara /* 4868a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4869a1177825SJan Kara * no dirty dquots 4870a1177825SJan Kara */ 4871a1177825SJan Kara dquot_writeback_dquots(sb, -1); 487206a407f1SDmitry Monakhov /* 487306a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 487406a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 487506a407f1SDmitry Monakhov * transaction_commit will do it for us. 487606a407f1SDmitry Monakhov */ 4877bda32530STheodore Ts'o if (sbi->s_journal) { 487806a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 487906a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 488006a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 488106a407f1SDmitry Monakhov needs_barrier = true; 488206a407f1SDmitry Monakhov 48838d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4884ac27a0ecSDave Kleikamp if (wait) 4885bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4886bda32530STheodore Ts'o target); 48870390131bSFrank Mayhar } 4888bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4889bda32530STheodore Ts'o needs_barrier = true; 489006a407f1SDmitry Monakhov if (needs_barrier) { 489106a407f1SDmitry Monakhov int err; 489206a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 489306a407f1SDmitry Monakhov if (!ret) 489406a407f1SDmitry Monakhov ret = err; 489506a407f1SDmitry Monakhov } 489606a407f1SDmitry Monakhov 489706a407f1SDmitry Monakhov return ret; 489806a407f1SDmitry Monakhov } 489906a407f1SDmitry Monakhov 4900ac27a0ecSDave Kleikamp /* 4901ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4902ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4903be4f27d3SYongqiang Yang * 4904be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 49058e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 49068e8ad8a5SJan Kara * modifications. 4907ac27a0ecSDave Kleikamp */ 4908c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4909ac27a0ecSDave Kleikamp { 4910c4be0c1dSTakashi Sato int error = 0; 4911c4be0c1dSTakashi Sato journal_t *journal; 4912ac27a0ecSDave Kleikamp 4913bc98a42cSDavid Howells if (sb_rdonly(sb)) 49149ca92389STheodore Ts'o return 0; 49159ca92389STheodore Ts'o 4916c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4917ac27a0ecSDave Kleikamp 4918bb044576STheodore Ts'o if (journal) { 4919ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4920dab291afSMingming Cao jbd2_journal_lock_updates(journal); 49217ffe1ea8SHidehiro Kawai 49227ffe1ea8SHidehiro Kawai /* 4923bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4924bb044576STheodore Ts'o * flush the journal. 49257ffe1ea8SHidehiro Kawai */ 4926c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 49276b0310fbSEric Sandeen if (error < 0) 49286b0310fbSEric Sandeen goto out; 4929ac27a0ecSDave Kleikamp 4930ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4931e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4932c642dc9eSEric Sandeen } 4933c642dc9eSEric Sandeen 4934e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 49356b0310fbSEric Sandeen out: 4936bb044576STheodore Ts'o if (journal) 49378e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4938bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 49396b0310fbSEric Sandeen return error; 4940ac27a0ecSDave Kleikamp } 4941ac27a0ecSDave Kleikamp 4942ac27a0ecSDave Kleikamp /* 4943ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4944ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4945ac27a0ecSDave Kleikamp */ 4946c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4947ac27a0ecSDave Kleikamp { 4948bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 49499ca92389STheodore Ts'o return 0; 49509ca92389STheodore Ts'o 4951c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 49529ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4953e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 4954c642dc9eSEric Sandeen } 4955c642dc9eSEric Sandeen 4956e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4957c4be0c1dSTakashi Sato return 0; 4958ac27a0ecSDave Kleikamp } 4959ac27a0ecSDave Kleikamp 4960673c6100STheodore Ts'o /* 4961673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4962673c6100STheodore Ts'o */ 4963673c6100STheodore Ts'o struct ext4_mount_options { 4964673c6100STheodore Ts'o unsigned long s_mount_opt; 4965a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 496608cefc7aSEric W. Biederman kuid_t s_resuid; 496708cefc7aSEric W. Biederman kgid_t s_resgid; 4968673c6100STheodore Ts'o unsigned long s_commit_interval; 4969673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4970673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4971673c6100STheodore Ts'o int s_jquota_fmt; 4972a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4973673c6100STheodore Ts'o #endif 4974673c6100STheodore Ts'o }; 4975673c6100STheodore Ts'o 4976617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4977ac27a0ecSDave Kleikamp { 4978617ba13bSMingming Cao struct ext4_super_block *es; 4979617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4980ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4981617ba13bSMingming Cao struct ext4_mount_options old_opts; 4982c79d967dSChristoph Hellwig int enable_quota = 0; 49838a266467STheodore Ts'o ext4_group_t g; 4984b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4985c5e06d10SJohann Lombardi int err = 0; 4986ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 498703dafb5fSChen Gang int i, j; 4988ac27a0ecSDave Kleikamp #endif 4989d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4990ac27a0ecSDave Kleikamp 4991ac27a0ecSDave Kleikamp /* Store the original options */ 4992ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4993ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4994a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4995ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4996ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4997ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 499830773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 499930773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5000ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5001ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5002a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 500303dafb5fSChen Gang if (sbi->s_qf_names[i]) { 500403dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 500503dafb5fSChen Gang GFP_KERNEL); 500603dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 500703dafb5fSChen Gang for (j = 0; j < i; j++) 500803dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 50093e36a163SWei Yongjun kfree(orig_data); 501003dafb5fSChen Gang return -ENOMEM; 501103dafb5fSChen Gang } 501203dafb5fSChen Gang } else 501303dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5014ac27a0ecSDave Kleikamp #endif 5015b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5016b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 5017ac27a0ecSDave Kleikamp 5018661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 5019ac27a0ecSDave Kleikamp err = -EINVAL; 5020ac27a0ecSDave Kleikamp goto restore_opts; 5021ac27a0ecSDave Kleikamp } 5022ac27a0ecSDave Kleikamp 50236b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 50246b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 50256b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 50262d5b86e0SEric Sandeen "during remount not supported; ignoring"); 50272d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5028c6d3d56dSDarrick J. Wong } 5029c6d3d56dSDarrick J. Wong 50306ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 50316ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 50326ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 50336ae6514bSPiotr Sarna "both data=journal and delalloc"); 50346ae6514bSPiotr Sarna err = -EINVAL; 50356ae6514bSPiotr Sarna goto restore_opts; 50366ae6514bSPiotr Sarna } 50376ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 50386ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 50396ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 50406ae6514bSPiotr Sarna err = -EINVAL; 50416ae6514bSPiotr Sarna goto restore_opts; 50426ae6514bSPiotr Sarna } 5043923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 5044923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 5045923ae0ffSRoss Zwisler "both data=journal and dax"); 5046923ae0ffSRoss Zwisler err = -EINVAL; 5047923ae0ffSRoss Zwisler goto restore_opts; 5048923ae0ffSRoss Zwisler } 5049ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5050ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5051ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5052ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5053ab04df78SJan Kara err = -EINVAL; 5054ab04df78SJan Kara goto restore_opts; 5055ab04df78SJan Kara } 5056923ae0ffSRoss Zwisler } 5057923ae0ffSRoss Zwisler 5058cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5059cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5060cdb7ee4cSTahsin Erdogan err = -EINVAL; 5061cdb7ee4cSTahsin Erdogan goto restore_opts; 5062cdb7ee4cSTahsin Erdogan } 5063cdb7ee4cSTahsin Erdogan 5064923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 5065923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 5066923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 5067923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 50686ae6514bSPiotr Sarna } 50696ae6514bSPiotr Sarna 50704ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 5071c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 5072ac27a0ecSDave Kleikamp 50731751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 50741751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5075ac27a0ecSDave Kleikamp 5076ac27a0ecSDave Kleikamp es = sbi->s_es; 5077ac27a0ecSDave Kleikamp 5078b3881f74STheodore Ts'o if (sbi->s_journal) { 5079617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5080b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 5081b3881f74STheodore Ts'o } 5082ac27a0ecSDave Kleikamp 50831751e8a6SLinus Torvalds if (*flags & SB_LAZYTIME) 50841751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 5085a2fd66d0STheodore Ts'o 50861751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 50874ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 5088ac27a0ecSDave Kleikamp err = -EROFS; 5089ac27a0ecSDave Kleikamp goto restore_opts; 5090ac27a0ecSDave Kleikamp } 5091ac27a0ecSDave Kleikamp 50921751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 509338c03b34STheodore Ts'o err = sync_filesystem(sb); 509438c03b34STheodore Ts'o if (err < 0) 509538c03b34STheodore Ts'o goto restore_opts; 50960f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 50970f0dd62fSChristoph Hellwig if (err < 0) 5098c79d967dSChristoph Hellwig goto restore_opts; 5099c79d967dSChristoph Hellwig 5100ac27a0ecSDave Kleikamp /* 5101ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 5102ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 5103ac27a0ecSDave Kleikamp */ 51041751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5105ac27a0ecSDave Kleikamp 5106ac27a0ecSDave Kleikamp /* 5107ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 5108ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5109ac27a0ecSDave Kleikamp * mark the partition as valid again. 5110ac27a0ecSDave Kleikamp */ 5111617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5112617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5113ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5114ac27a0ecSDave Kleikamp 5115a63c9eb2STheodore Ts'o if (sbi->s_journal) 5116617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 5117ac27a0ecSDave Kleikamp } else { 5118a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5119e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 51202cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5121ac27a0ecSDave Kleikamp err = -EROFS; 5122ac27a0ecSDave Kleikamp goto restore_opts; 5123ac27a0ecSDave Kleikamp } 5124ead6596bSEric Sandeen /* 51258a266467STheodore Ts'o * Make sure the group descriptor checksums 51260b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 51278a266467STheodore Ts'o */ 51288a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 51298a266467STheodore Ts'o struct ext4_group_desc *gdp = 51308a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 51318a266467STheodore Ts'o 5132feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5133b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5134b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 5135e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 51368a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 51376a797d27SDarrick J. Wong err = -EFSBADCRC; 51388a266467STheodore Ts'o goto restore_opts; 51398a266467STheodore Ts'o } 51408a266467STheodore Ts'o } 51418a266467STheodore Ts'o 51428a266467STheodore Ts'o /* 5143ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5144ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5145ead6596bSEric Sandeen * require a full umount/remount for now. 5146ead6596bSEric Sandeen */ 5147ead6596bSEric Sandeen if (es->s_last_orphan) { 5148b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5149ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5150ead6596bSEric Sandeen "orphan inode list. Please " 5151b31e1552SEric Sandeen "umount/remount instead"); 5152ead6596bSEric Sandeen err = -EINVAL; 5153ead6596bSEric Sandeen goto restore_opts; 5154ead6596bSEric Sandeen } 5155ead6596bSEric Sandeen 5156ac27a0ecSDave Kleikamp /* 5157ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5158ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5159ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5160ac27a0ecSDave Kleikamp * the partition.) 5161ac27a0ecSDave Kleikamp */ 51620390131bSFrank Mayhar if (sbi->s_journal) 5163617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5164ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5165617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 51661751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 5167e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 5168c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5169c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5170c5e06d10SJohann Lombardi err = -EROFS; 5171c5e06d10SJohann Lombardi goto restore_opts; 5172c5e06d10SJohann Lombardi } 5173c79d967dSChristoph Hellwig enable_quota = 1; 5174ac27a0ecSDave Kleikamp } 5175ac27a0ecSDave Kleikamp } 5176bfff6873SLukas Czerner 5177bfff6873SLukas Czerner /* 5178bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5179bfff6873SLukas Czerner * current settings 5180bfff6873SLukas Czerner */ 5181bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 5182bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5183bfff6873SLukas Czerner else { 5184bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5185bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5186bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5187bfff6873SLukas Czerner } 5188bfff6873SLukas Czerner 51896fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 51901751e8a6SLinus Torvalds if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) 5191e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 51920390131bSFrank Mayhar 5193ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5194ac27a0ecSDave Kleikamp /* Release old quota file names */ 5195a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5196ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 51977c319d32SAditya Kali if (enable_quota) { 51987c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 51990f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 5200e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 52017c319d32SAditya Kali err = ext4_enable_quotas(sb); 520207724f98STheodore Ts'o if (err) 52037c319d32SAditya Kali goto restore_opts; 52047c319d32SAditya Kali } 52057c319d32SAditya Kali } 52067c319d32SAditya Kali #endif 5207d4c402d9SCurt Wohlgemuth 52081751e8a6SLinus Torvalds *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME); 5209d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5210d4c402d9SCurt Wohlgemuth kfree(orig_data); 5211ac27a0ecSDave Kleikamp return 0; 52120b8e58a1SAndreas Dilger 5213ac27a0ecSDave Kleikamp restore_opts: 5214ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5215ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5216a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5217ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5218ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5219ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 522030773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 522130773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5222ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5223ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5224a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5225ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5226ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5227ac27a0ecSDave Kleikamp } 5228ac27a0ecSDave Kleikamp #endif 5229d4c402d9SCurt Wohlgemuth kfree(orig_data); 5230ac27a0ecSDave Kleikamp return err; 5231ac27a0ecSDave Kleikamp } 5232ac27a0ecSDave Kleikamp 5233689c958cSLi Xi #ifdef CONFIG_QUOTA 5234689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 5235689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 5236689c958cSLi Xi { 5237689c958cSLi Xi struct kqid qid; 5238689c958cSLi Xi struct dquot *dquot; 5239689c958cSLi Xi u64 limit; 5240689c958cSLi Xi u64 curblock; 5241689c958cSLi Xi 5242689c958cSLi Xi qid = make_kqid_projid(projid); 5243689c958cSLi Xi dquot = dqget(sb, qid); 5244689c958cSLi Xi if (IS_ERR(dquot)) 5245689c958cSLi Xi return PTR_ERR(dquot); 52467b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 5247689c958cSLi Xi 5248689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 5249689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 5250689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 5251689c958cSLi Xi if (limit && buf->f_blocks > limit) { 5252689c958cSLi Xi curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; 5253689c958cSLi Xi buf->f_blocks = limit; 5254689c958cSLi Xi buf->f_bfree = buf->f_bavail = 5255689c958cSLi Xi (buf->f_blocks > curblock) ? 5256689c958cSLi Xi (buf->f_blocks - curblock) : 0; 5257689c958cSLi Xi } 5258689c958cSLi Xi 5259689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 5260689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 5261689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 5262689c958cSLi Xi if (limit && buf->f_files > limit) { 5263689c958cSLi Xi buf->f_files = limit; 5264689c958cSLi Xi buf->f_ffree = 5265689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 5266689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 5267689c958cSLi Xi } 5268689c958cSLi Xi 52697b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 5270689c958cSLi Xi dqput(dquot); 5271689c958cSLi Xi return 0; 5272689c958cSLi Xi } 5273689c958cSLi Xi #endif 5274689c958cSLi Xi 5275617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5276ac27a0ecSDave Kleikamp { 5277ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5278617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5279617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 528027dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5281960cc398SPekka Enberg u64 fsid; 5282d02a9391SKazuya Mio s64 bfree; 528327dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5284ac27a0ecSDave Kleikamp 5285952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5286952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5287ac27a0ecSDave Kleikamp 5288617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5289ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5290b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 529157042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 529257042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5293d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 529457042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 529527dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 529627dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 529727dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5298ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5299ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 530052d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5301617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5302960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5303960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5304960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5305960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 53060b8e58a1SAndreas Dilger 5307689c958cSLi Xi #ifdef CONFIG_QUOTA 5308689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5309689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5310689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5311689c958cSLi Xi #endif 5312ac27a0ecSDave Kleikamp return 0; 5313ac27a0ecSDave Kleikamp } 5314ac27a0ecSDave Kleikamp 5315ac27a0ecSDave Kleikamp 5316ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5317ac27a0ecSDave Kleikamp 5318bc8230eeSJan Kara /* 5319bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 5320bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 5321bc8230eeSJan Kara */ 5322ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5323ac27a0ecSDave Kleikamp { 53244c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5325ac27a0ecSDave Kleikamp } 5326ac27a0ecSDave Kleikamp 5327617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5328ac27a0ecSDave Kleikamp { 5329ac27a0ecSDave Kleikamp int ret, err; 5330ac27a0ecSDave Kleikamp handle_t *handle; 5331ac27a0ecSDave Kleikamp struct inode *inode; 5332ac27a0ecSDave Kleikamp 5333ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 53349924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5335617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5336ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5337ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5338ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5339617ba13bSMingming Cao err = ext4_journal_stop(handle); 5340ac27a0ecSDave Kleikamp if (!ret) 5341ac27a0ecSDave Kleikamp ret = err; 5342ac27a0ecSDave Kleikamp return ret; 5343ac27a0ecSDave Kleikamp } 5344ac27a0ecSDave Kleikamp 5345617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5346ac27a0ecSDave Kleikamp { 5347ac27a0ecSDave Kleikamp int ret, err; 5348ac27a0ecSDave Kleikamp handle_t *handle; 5349ac27a0ecSDave Kleikamp 53509924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5351617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5352ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5353ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5354ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5355617ba13bSMingming Cao err = ext4_journal_stop(handle); 5356ac27a0ecSDave Kleikamp if (!ret) 5357ac27a0ecSDave Kleikamp ret = err; 5358ac27a0ecSDave Kleikamp return ret; 5359ac27a0ecSDave Kleikamp } 5360ac27a0ecSDave Kleikamp 5361617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5362ac27a0ecSDave Kleikamp { 5363ac27a0ecSDave Kleikamp int ret, err; 5364ac27a0ecSDave Kleikamp handle_t *handle; 5365ac27a0ecSDave Kleikamp 53669924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5367617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 53689c3013e9SJan Kara if (IS_ERR(handle)) { 53699c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 53709c3013e9SJan Kara dquot_release(dquot); 5371ac27a0ecSDave Kleikamp return PTR_ERR(handle); 53729c3013e9SJan Kara } 5373ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5374617ba13bSMingming Cao err = ext4_journal_stop(handle); 5375ac27a0ecSDave Kleikamp if (!ret) 5376ac27a0ecSDave Kleikamp ret = err; 5377ac27a0ecSDave Kleikamp return ret; 5378ac27a0ecSDave Kleikamp } 5379ac27a0ecSDave Kleikamp 5380617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5381ac27a0ecSDave Kleikamp { 5382262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5383262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5384262b4662SJan Kara 53852c8be6b2SJan Kara /* Are we journaling quotas? */ 5386e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5387262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5388ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5389617ba13bSMingming Cao return ext4_write_dquot(dquot); 5390ac27a0ecSDave Kleikamp } else { 5391ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5392ac27a0ecSDave Kleikamp } 5393ac27a0ecSDave Kleikamp } 5394ac27a0ecSDave Kleikamp 5395617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5396ac27a0ecSDave Kleikamp { 5397ac27a0ecSDave Kleikamp int ret, err; 5398ac27a0ecSDave Kleikamp handle_t *handle; 5399ac27a0ecSDave Kleikamp 5400ac27a0ecSDave Kleikamp /* Data block + inode block */ 54012b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5402ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5403ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5404ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5405617ba13bSMingming Cao err = ext4_journal_stop(handle); 5406ac27a0ecSDave Kleikamp if (!ret) 5407ac27a0ecSDave Kleikamp ret = err; 5408ac27a0ecSDave Kleikamp return ret; 5409ac27a0ecSDave Kleikamp } 5410ac27a0ecSDave Kleikamp 5411ac27a0ecSDave Kleikamp /* 5412ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5413ac27a0ecSDave Kleikamp * the quota file and such... 5414ac27a0ecSDave Kleikamp */ 5415617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5416ac27a0ecSDave Kleikamp { 5417287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5418617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5419ac27a0ecSDave Kleikamp } 5420ac27a0ecSDave Kleikamp 5421daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5422daf647d2STheodore Ts'o { 5423daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5424daf647d2STheodore Ts'o 5425daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5426daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5427daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5428daf647d2STheodore Ts'o * because the name of the lock is set using the 5429daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5430daf647d2STheodore Ts'o */ 5431daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5432daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5433daf647d2STheodore Ts'o } 5434daf647d2STheodore Ts'o 5435ac27a0ecSDave Kleikamp /* 5436ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5437ac27a0ecSDave Kleikamp */ 5438617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 54398c54ca9cSAl Viro const struct path *path) 5440ac27a0ecSDave Kleikamp { 5441ac27a0ecSDave Kleikamp int err; 5442ac27a0ecSDave Kleikamp 5443ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5444ac27a0ecSDave Kleikamp return -EINVAL; 54450623543bSJan Kara 5446ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5447d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5448ac27a0ecSDave Kleikamp return -EXDEV; 54490623543bSJan Kara /* Journaling quota? */ 54500623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 54512b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5452f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5453b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5454b31e1552SEric Sandeen "Quota file not on filesystem root. " 5455b31e1552SEric Sandeen "Journaled quota will not work"); 545691389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 545791389240SJan Kara } else { 545891389240SJan Kara /* 545991389240SJan Kara * Clear the flag just in case mount options changed since 546091389240SJan Kara * last time. 546191389240SJan Kara */ 546291389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 54630623543bSJan Kara } 54640623543bSJan Kara 54650623543bSJan Kara /* 54660623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 54670623543bSJan Kara * all updates to the file when we bypass pagecache... 54680623543bSJan Kara */ 54690390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 54702b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 54710623543bSJan Kara /* 54720623543bSJan Kara * We don't need to lock updates but journal_flush() could 54730623543bSJan Kara * otherwise be livelocked... 54740623543bSJan Kara */ 54750623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 54767ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 54770623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5478f00c9e44SJan Kara if (err) 54797ffe1ea8SHidehiro Kawai return err; 54807ffe1ea8SHidehiro Kawai } 5481957153fcSJan Kara 5482daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5483daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5484957153fcSJan Kara if (err) { 5485daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5486daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5487957153fcSJan Kara } else { 5488957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 5489957153fcSJan Kara handle_t *handle; 5490957153fcSJan Kara 549161a92987SJan Kara /* 549261a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 549361a92987SJan Kara * files. If this fails, we return success anyway since quotas 549461a92987SJan Kara * are already enabled and this is not a hard failure. 549561a92987SJan Kara */ 5496957153fcSJan Kara inode_lock(inode); 5497957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 5498957153fcSJan Kara if (IS_ERR(handle)) 5499957153fcSJan Kara goto unlock_inode; 5500957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 5501957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 5502957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 5503957153fcSJan Kara ext4_mark_inode_dirty(handle, inode); 5504957153fcSJan Kara ext4_journal_stop(handle); 5505957153fcSJan Kara unlock_inode: 5506957153fcSJan Kara inode_unlock(inode); 5507957153fcSJan Kara } 5508daf647d2STheodore Ts'o return err; 5509ac27a0ecSDave Kleikamp } 5510ac27a0ecSDave Kleikamp 55117c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 55127c319d32SAditya Kali unsigned int flags) 55137c319d32SAditya Kali { 55147c319d32SAditya Kali int err; 55157c319d32SAditya Kali struct inode *qf_inode; 5516a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 55177c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5518689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5519689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 55207c319d32SAditya Kali }; 55217c319d32SAditya Kali 5522e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 55237c319d32SAditya Kali 55247c319d32SAditya Kali if (!qf_inums[type]) 55257c319d32SAditya Kali return -EPERM; 55267c319d32SAditya Kali 55277c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 55287c319d32SAditya Kali if (IS_ERR(qf_inode)) { 55297c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 55307c319d32SAditya Kali return PTR_ERR(qf_inode); 55317c319d32SAditya Kali } 55327c319d32SAditya Kali 5533bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5534bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5535daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 55367c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 55377c319d32SAditya Kali iput(qf_inode); 5538daf647d2STheodore Ts'o if (err) 5539daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 55407c319d32SAditya Kali 55417c319d32SAditya Kali return err; 55427c319d32SAditya Kali } 55437c319d32SAditya Kali 55447c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 55457c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 55467c319d32SAditya Kali { 55477c319d32SAditya Kali int type, err = 0; 5548a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 55497c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5550689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5551689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 55527c319d32SAditya Kali }; 555349da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 555449da9392SJan Kara test_opt(sb, USRQUOTA), 555549da9392SJan Kara test_opt(sb, GRPQUOTA), 555649da9392SJan Kara test_opt(sb, PRJQUOTA), 555749da9392SJan Kara }; 55587c319d32SAditya Kali 555991389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 5560a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 55617c319d32SAditya Kali if (qf_inums[type]) { 55627c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 556349da9392SJan Kara DQUOT_USAGE_ENABLED | 556449da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 55657c319d32SAditya Kali if (err) { 556695f1fda4Szhangyi (F) for (type--; type >= 0; type--) 556795f1fda4Szhangyi (F) dquot_quota_off(sb, type); 556895f1fda4Szhangyi (F) 55697c319d32SAditya Kali ext4_warning(sb, 557072ba7450STheodore Ts'o "Failed to enable quota tracking " 557172ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 557272ba7450STheodore Ts'o "e2fsck to fix.", type, err); 55737c319d32SAditya Kali return err; 55747c319d32SAditya Kali } 55757c319d32SAditya Kali } 55767c319d32SAditya Kali } 55777c319d32SAditya Kali return 0; 55787c319d32SAditya Kali } 55797c319d32SAditya Kali 5580ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5581ca0e05e4SDmitry Monakhov { 558221f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 558321f97697SJan Kara handle_t *handle; 5584957153fcSJan Kara int err; 558521f97697SJan Kara 558687009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 558787009d86SDmitry Monakhov * Caller already holds s_umount sem */ 558887009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5589ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5590ca0e05e4SDmitry Monakhov 5591957153fcSJan Kara if (!inode || !igrab(inode)) 55920b268590SAmir Goldstein goto out; 55930b268590SAmir Goldstein 5594957153fcSJan Kara err = dquot_quota_off(sb, type); 5595964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 5596957153fcSJan Kara goto out_put; 5597957153fcSJan Kara 5598957153fcSJan Kara inode_lock(inode); 559961a92987SJan Kara /* 560061a92987SJan Kara * Update modification times of quota files when userspace can 560161a92987SJan Kara * start looking at them. If we fail, we return success anyway since 560261a92987SJan Kara * this is not a hard failure and quotas are already disabled. 560361a92987SJan Kara */ 56049924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 560521f97697SJan Kara if (IS_ERR(handle)) 5606957153fcSJan Kara goto out_unlock; 5607957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 5608957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 5609eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 561021f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 561121f97697SJan Kara ext4_journal_stop(handle); 5612957153fcSJan Kara out_unlock: 5613957153fcSJan Kara inode_unlock(inode); 5614957153fcSJan Kara out_put: 5615964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 5616957153fcSJan Kara iput(inode); 5617957153fcSJan Kara return err; 561821f97697SJan Kara out: 5619ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5620ca0e05e4SDmitry Monakhov } 5621ca0e05e4SDmitry Monakhov 5622ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5623ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5624ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5625ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5626617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5627ac27a0ecSDave Kleikamp size_t len, loff_t off) 5628ac27a0ecSDave Kleikamp { 5629ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5630725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5631ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5632ac27a0ecSDave Kleikamp int tocopy; 5633ac27a0ecSDave Kleikamp size_t toread; 5634ac27a0ecSDave Kleikamp struct buffer_head *bh; 5635ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5636ac27a0ecSDave Kleikamp 5637ac27a0ecSDave Kleikamp if (off > i_size) 5638ac27a0ecSDave Kleikamp return 0; 5639ac27a0ecSDave Kleikamp if (off+len > i_size) 5640ac27a0ecSDave Kleikamp len = i_size-off; 5641ac27a0ecSDave Kleikamp toread = len; 5642ac27a0ecSDave Kleikamp while (toread > 0) { 5643ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5644ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 56451c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 56461c215028STheodore Ts'o if (IS_ERR(bh)) 56471c215028STheodore Ts'o return PTR_ERR(bh); 5648ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5649ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5650ac27a0ecSDave Kleikamp else 5651ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5652ac27a0ecSDave Kleikamp brelse(bh); 5653ac27a0ecSDave Kleikamp offset = 0; 5654ac27a0ecSDave Kleikamp toread -= tocopy; 5655ac27a0ecSDave Kleikamp data += tocopy; 5656ac27a0ecSDave Kleikamp blk++; 5657ac27a0ecSDave Kleikamp } 5658ac27a0ecSDave Kleikamp return len; 5659ac27a0ecSDave Kleikamp } 5660ac27a0ecSDave Kleikamp 5661ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5662ac27a0ecSDave Kleikamp * enough credits) */ 5663617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5664ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5665ac27a0ecSDave Kleikamp { 5666ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5667725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 56681c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5669c5e298aeSTheodore Ts'o int retries = 0; 5670ac27a0ecSDave Kleikamp struct buffer_head *bh; 5671ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5672ac27a0ecSDave Kleikamp 56730390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5674b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5675b31e1552SEric Sandeen " cancelled because transaction is not started", 56769c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 56779c3013e9SJan Kara return -EIO; 56789c3013e9SJan Kara } 567967eeb568SDmitry Monakhov /* 568067eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 568167eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 568267eeb568SDmitry Monakhov */ 568367eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 568467eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 568567eeb568SDmitry Monakhov " cancelled because not block aligned", 568667eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 568767eeb568SDmitry Monakhov return -EIO; 568867eeb568SDmitry Monakhov } 568967eeb568SDmitry Monakhov 5690c5e298aeSTheodore Ts'o do { 5691c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5692c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5693c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5694c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5695c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 56961c215028STheodore Ts'o if (IS_ERR(bh)) 56971c215028STheodore Ts'o return PTR_ERR(bh); 5698ac27a0ecSDave Kleikamp if (!bh) 5699ac27a0ecSDave Kleikamp goto out; 57005d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5701617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5702ac27a0ecSDave Kleikamp if (err) { 5703ac27a0ecSDave Kleikamp brelse(bh); 57041c215028STheodore Ts'o return err; 5705ac27a0ecSDave Kleikamp } 5706ac27a0ecSDave Kleikamp lock_buffer(bh); 570767eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5708ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5709ac27a0ecSDave Kleikamp unlock_buffer(bh); 57100390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5711ac27a0ecSDave Kleikamp brelse(bh); 5712ac27a0ecSDave Kleikamp out: 571367eeb568SDmitry Monakhov if (inode->i_size < off + len) { 571467eeb568SDmitry Monakhov i_size_write(inode, off + len); 5715617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5716617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 571721f97697SJan Kara } 571867eeb568SDmitry Monakhov return len; 5719ac27a0ecSDave Kleikamp } 5720ac27a0ecSDave Kleikamp 57218f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) 57228f0e8746STheodore Ts'o { 57238f0e8746STheodore Ts'o const struct quota_format_ops *ops; 57248f0e8746STheodore Ts'o 57258f0e8746STheodore Ts'o if (!sb_has_quota_loaded(sb, qid->type)) 57268f0e8746STheodore Ts'o return -ESRCH; 57278f0e8746STheodore Ts'o ops = sb_dqopt(sb)->ops[qid->type]; 57288f0e8746STheodore Ts'o if (!ops || !ops->get_next_id) 57298f0e8746STheodore Ts'o return -ENOSYS; 57308f0e8746STheodore Ts'o return dquot_get_next_id(sb, qid); 57318f0e8746STheodore Ts'o } 5732ac27a0ecSDave Kleikamp #endif 5733ac27a0ecSDave Kleikamp 5734152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5735152a0836SAl Viro const char *dev_name, void *data) 5736ac27a0ecSDave Kleikamp { 5737152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5738ac27a0ecSDave Kleikamp } 5739ac27a0ecSDave Kleikamp 5740c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 574124b58424STheodore Ts'o static inline void register_as_ext2(void) 574224b58424STheodore Ts'o { 574324b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 574424b58424STheodore Ts'o if (err) 574524b58424STheodore Ts'o printk(KERN_WARNING 574624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 574724b58424STheodore Ts'o } 574824b58424STheodore Ts'o 574924b58424STheodore Ts'o static inline void unregister_as_ext2(void) 575024b58424STheodore Ts'o { 575124b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 575224b58424STheodore Ts'o } 57532035e776STheodore Ts'o 57542035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 57552035e776STheodore Ts'o { 5756e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 57572035e776STheodore Ts'o return 0; 5758bc98a42cSDavid Howells if (sb_rdonly(sb)) 57592035e776STheodore Ts'o return 1; 5760e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 57612035e776STheodore Ts'o return 0; 57622035e776STheodore Ts'o return 1; 57632035e776STheodore Ts'o } 576424b58424STheodore Ts'o #else 576524b58424STheodore Ts'o static inline void register_as_ext2(void) { } 576624b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 57672035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 576824b58424STheodore Ts'o #endif 576924b58424STheodore Ts'o 577024b58424STheodore Ts'o static inline void register_as_ext3(void) 577124b58424STheodore Ts'o { 577224b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 577324b58424STheodore Ts'o if (err) 577424b58424STheodore Ts'o printk(KERN_WARNING 577524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 577624b58424STheodore Ts'o } 577724b58424STheodore Ts'o 577824b58424STheodore Ts'o static inline void unregister_as_ext3(void) 577924b58424STheodore Ts'o { 578024b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 578124b58424STheodore Ts'o } 57822035e776STheodore Ts'o 57832035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 57842035e776STheodore Ts'o { 5785e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 57862035e776STheodore Ts'o return 0; 5787e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 57882035e776STheodore Ts'o return 0; 5789bc98a42cSDavid Howells if (sb_rdonly(sb)) 57902035e776STheodore Ts'o return 1; 5791e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 57922035e776STheodore Ts'o return 0; 57932035e776STheodore Ts'o return 1; 57942035e776STheodore Ts'o } 579524b58424STheodore Ts'o 579603010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5797ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 579803010a33STheodore Ts'o .name = "ext4", 5799152a0836SAl Viro .mount = ext4_mount, 5800ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5801ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5802ac27a0ecSDave Kleikamp }; 58037f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5804ac27a0ecSDave Kleikamp 5805e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5806e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5807e9e3bcecSEric Sandeen 58085dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5809ac27a0ecSDave Kleikamp { 5810e9e3bcecSEric Sandeen int i, err; 5811c9de560dSAlex Tomas 5812e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 581307c0c5d8SAl Viro ext4_li_info = NULL; 581407c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 581507c0c5d8SAl Viro 58169a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 581712e9b892SDmitry Monakhov ext4_check_flag_values(); 5818e9e3bcecSEric Sandeen 5819e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 5820e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5821e9e3bcecSEric Sandeen 582251865fdaSZheng Liu err = ext4_init_es(); 58236fd058f7STheodore Ts'o if (err) 58246fd058f7STheodore Ts'o return err; 582551865fdaSZheng Liu 582651865fdaSZheng Liu err = ext4_init_pageio(); 582751865fdaSZheng Liu if (err) 5828b5799018STheodore Ts'o goto out5; 582951865fdaSZheng Liu 58305dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5831bd2d0210STheodore Ts'o if (err) 5832b5799018STheodore Ts'o goto out4; 5833857ac889SLukas Czerner 5834b5799018STheodore Ts'o err = ext4_init_sysfs(); 5835dd68314cSTheodore Ts'o if (err) 5836b5799018STheodore Ts'o goto out3; 5837857ac889SLukas Czerner 58385dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5839ac27a0ecSDave Kleikamp if (err) 5840c9de560dSAlex Tomas goto out2; 5841ac27a0ecSDave Kleikamp err = init_inodecache(); 5842ac27a0ecSDave Kleikamp if (err) 5843ac27a0ecSDave Kleikamp goto out1; 584424b58424STheodore Ts'o register_as_ext3(); 58452035e776STheodore Ts'o register_as_ext2(); 584603010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5847ac27a0ecSDave Kleikamp if (err) 5848ac27a0ecSDave Kleikamp goto out; 5849bfff6873SLukas Czerner 5850ac27a0ecSDave Kleikamp return 0; 5851ac27a0ecSDave Kleikamp out: 585224b58424STheodore Ts'o unregister_as_ext2(); 585324b58424STheodore Ts'o unregister_as_ext3(); 5854ac27a0ecSDave Kleikamp destroy_inodecache(); 5855ac27a0ecSDave Kleikamp out1: 58565dabfc78STheodore Ts'o ext4_exit_mballoc(); 58579c191f70ST Makphaibulchoke out2: 5858b5799018STheodore Ts'o ext4_exit_sysfs(); 5859b5799018STheodore Ts'o out3: 5860dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5861b5799018STheodore Ts'o out4: 58625dabfc78STheodore Ts'o ext4_exit_pageio(); 5863b5799018STheodore Ts'o out5: 586451865fdaSZheng Liu ext4_exit_es(); 586551865fdaSZheng Liu 5866ac27a0ecSDave Kleikamp return err; 5867ac27a0ecSDave Kleikamp } 5868ac27a0ecSDave Kleikamp 58695dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5870ac27a0ecSDave Kleikamp { 5871bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 587224b58424STheodore Ts'o unregister_as_ext2(); 587324b58424STheodore Ts'o unregister_as_ext3(); 587403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5875ac27a0ecSDave Kleikamp destroy_inodecache(); 58765dabfc78STheodore Ts'o ext4_exit_mballoc(); 5877b5799018STheodore Ts'o ext4_exit_sysfs(); 58785dabfc78STheodore Ts'o ext4_exit_system_zone(); 58795dabfc78STheodore Ts'o ext4_exit_pageio(); 5880dd12ed14SEric Sandeen ext4_exit_es(); 5881ac27a0ecSDave Kleikamp } 5882ac27a0ecSDave Kleikamp 5883ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 588483982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5885ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 58865dabfc78STheodore Ts'o module_init(ext4_init_fs) 58875dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5888