diff options
Diffstat (limited to 'fs/f2fs/super.c')
| -rw-r--r-- | fs/f2fs/super.c | 4807 |
1 files changed, 4807 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c new file mode 100644 index 000000000..3805162dc --- /dev/null +++ b/fs/f2fs/super.c @@ -0,0 +1,4807 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * fs/f2fs/super.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + */ +#include <linux/module.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/fs_context.h> +#include <linux/sched/mm.h> +#include <linux/statfs.h> +#include <linux/buffer_head.h> +#include <linux/kthread.h> +#include <linux/parser.h> +#include <linux/mount.h> +#include <linux/seq_file.h> +#include <linux/proc_fs.h> +#include <linux/random.h> +#include <linux/exportfs.h> +#include <linux/blkdev.h> +#include <linux/quotaops.h> +#include <linux/f2fs_fs.h> +#include <linux/sysfs.h> +#include <linux/quota.h> +#include <linux/unicode.h> +#include <linux/part_stat.h> +#include <linux/zstd.h> +#include <linux/lz4.h> + +#include "f2fs.h" +#include "node.h" +#include "segment.h" +#include "xattr.h" +#include "gc.h" +#include "iostat.h" + +#define CREATE_TRACE_POINTS +#include <trace/events/f2fs.h> + +static struct kmem_cache *f2fs_inode_cachep; + +#ifdef CONFIG_F2FS_FAULT_INJECTION + +const char *f2fs_fault_name[FAULT_MAX] = { + [FAULT_KMALLOC] = "kmalloc", + [FAULT_KVMALLOC] = "kvmalloc", + [FAULT_PAGE_ALLOC] = "page alloc", + [FAULT_PAGE_GET] = "page get", + [FAULT_ALLOC_NID] = "alloc nid", + [FAULT_ORPHAN] = "orphan", + [FAULT_BLOCK] = "no more block", + [FAULT_DIR_DEPTH] = "too big dir depth", + [FAULT_EVICT_INODE] = "evict_inode fail", + [FAULT_TRUNCATE] = "truncate fail", + [FAULT_READ_IO] = "read IO error", + [FAULT_CHECKPOINT] = "checkpoint error", + [FAULT_DISCARD] = "discard error", + [FAULT_WRITE_IO] = "write IO error", + [FAULT_SLAB_ALLOC] = "slab alloc", + [FAULT_DQUOT_INIT] = "dquot initialize", + [FAULT_LOCK_OP] = "lock_op", +}; + +void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate, + unsigned int type) +{ + struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info; + + if (rate) { + atomic_set(&ffi->inject_ops, 0); + ffi->inject_rate = rate; + } + + if (type) + ffi->inject_type = type; + + if (!rate && !type) + memset(ffi, 0, sizeof(struct f2fs_fault_info)); +} +#endif + +/* f2fs-wide shrinker description */ +static struct shrinker f2fs_shrinker_info = { + .scan_objects = f2fs_shrink_scan, + .count_objects = f2fs_shrink_count, + .seeks = DEFAULT_SEEKS, +}; + +enum { + Opt_gc_background, + Opt_disable_roll_forward, + Opt_norecovery, + Opt_discard, + Opt_nodiscard, + Opt_noheap, + Opt_heap, + Opt_user_xattr, + Opt_nouser_xattr, + Opt_acl, + Opt_noacl, + Opt_active_logs, + Opt_disable_ext_identify, + Opt_inline_xattr, + Opt_noinline_xattr, + Opt_inline_xattr_size, + Opt_inline_data, + Opt_inline_dentry, + Opt_noinline_dentry, + Opt_flush_merge, + Opt_noflush_merge, + Opt_nobarrier, + Opt_fastboot, + Opt_extent_cache, + Opt_noextent_cache, + Opt_noinline_data, + Opt_data_flush, + Opt_reserve_root, + Opt_resgid, + Opt_resuid, + Opt_mode, + Opt_io_size_bits, + Opt_fault_injection, + Opt_fault_type, + Opt_lazytime, + Opt_nolazytime, + Opt_quota, + Opt_noquota, + Opt_usrquota, + Opt_grpquota, + Opt_prjquota, + Opt_usrjquota, + Opt_grpjquota, + Opt_prjjquota, + Opt_offusrjquota, + Opt_offgrpjquota, + Opt_offprjjquota, + Opt_jqfmt_vfsold, + Opt_jqfmt_vfsv0, + Opt_jqfmt_vfsv1, + Opt_alloc, + Opt_fsync, + Opt_test_dummy_encryption, + Opt_inlinecrypt, + Opt_checkpoint_disable, + Opt_checkpoint_disable_cap, + Opt_checkpoint_disable_cap_perc, + Opt_checkpoint_enable, + Opt_checkpoint_merge, + Opt_nocheckpoint_merge, + Opt_compress_algorithm, + Opt_compress_log_size, + Opt_compress_extension, + Opt_nocompress_extension, + Opt_compress_chksum, + Opt_compress_mode, + Opt_compress_cache, + Opt_atgc, + Opt_gc_merge, + Opt_nogc_merge, + Opt_discard_unit, + Opt_memory_mode, + Opt_err, +}; + +static match_table_t f2fs_tokens = { + {Opt_gc_background, "background_gc=%s"}, + {Opt_disable_roll_forward, "disable_roll_forward"}, + {Opt_norecovery, "norecovery"}, + {Opt_discard, "discard"}, + {Opt_nodiscard, "nodiscard"}, + {Opt_noheap, "no_heap"}, + {Opt_heap, "heap"}, + {Opt_user_xattr, "user_xattr"}, + {Opt_nouser_xattr, "nouser_xattr"}, + {Opt_acl, "acl"}, + {Opt_noacl, "noacl"}, + {Opt_active_logs, "active_logs=%u"}, + {Opt_disable_ext_identify, "disable_ext_identify"}, + {Opt_inline_xattr, "inline_xattr"}, + {Opt_noinline_xattr, "noinline_xattr"}, + {Opt_inline_xattr_size, "inline_xattr_size=%u"}, + {Opt_inline_data, "inline_data"}, + {Opt_inline_dentry, "inline_dentry"}, + {Opt_noinline_dentry, "noinline_dentry"}, + {Opt_flush_merge, "flush_merge"}, + {Opt_noflush_merge, "noflush_merge"}, + {Opt_nobarrier, "nobarrier"}, + {Opt_fastboot, "fastboot"}, + {Opt_extent_cache, "extent_cache"}, + {Opt_noextent_cache, "noextent_cache"}, + {Opt_noinline_data, "noinline_data"}, + {Opt_data_flush, "data_flush"}, + {Opt_reserve_root, "reserve_root=%u"}, + {Opt_resgid, "resgid=%u"}, + {Opt_resuid, "resuid=%u"}, + {Opt_mode, "mode=%s"}, + {Opt_io_size_bits, "io_bits=%u"}, + {Opt_fault_injection, "fault_injection=%u"}, + {Opt_fault_type, "fault_type=%u"}, + {Opt_lazytime, "lazytime"}, + {Opt_nolazytime, "nolazytime"}, + {Opt_quota, "quota"}, + {Opt_noquota, "noquota"}, + {Opt_usrquota, "usrquota"}, + {Opt_grpquota, "grpquota"}, + {Opt_prjquota, "prjquota"}, + {Opt_usrjquota, "usrjquota=%s"}, + {Opt_grpjquota, "grpjquota=%s"}, + {Opt_prjjquota, "prjjquota=%s"}, + {Opt_offusrjquota, "usrjquota="}, + {Opt_offgrpjquota, "grpjquota="}, + {Opt_offprjjquota, "prjjquota="}, + {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, + {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, + {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, + {Opt_alloc, "alloc_mode=%s"}, + {Opt_fsync, "fsync_mode=%s"}, + {Opt_test_dummy_encryption, "test_dummy_encryption=%s"}, + {Opt_test_dummy_encryption, "test_dummy_encryption"}, + {Opt_inlinecrypt, "inlinecrypt"}, + {Opt_checkpoint_disable, "checkpoint=disable"}, + {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"}, + {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"}, + {Opt_checkpoint_enable, "checkpoint=enable"}, + {Opt_checkpoint_merge, "checkpoint_merge"}, + {Opt_nocheckpoint_merge, "nocheckpoint_merge"}, + {Opt_compress_algorithm, "compress_algorithm=%s"}, + {Opt_compress_log_size, "compress_log_size=%u"}, + {Opt_compress_extension, "compress_extension=%s"}, + {Opt_nocompress_extension, "nocompress_extension=%s"}, + {Opt_compress_chksum, "compress_chksum"}, + {Opt_compress_mode, "compress_mode=%s"}, + {Opt_compress_cache, "compress_cache"}, + {Opt_atgc, "atgc"}, + {Opt_gc_merge, "gc_merge"}, + {Opt_nogc_merge, "nogc_merge"}, + {Opt_discard_unit, "discard_unit=%s"}, + {Opt_memory_mode, "memory=%s"}, + {Opt_err, NULL}, +}; + +void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + int level; + + va_start(args, fmt); + + level = printk_get_level(fmt); + vaf.fmt = printk_skip_level(fmt); + vaf.va = &args; + printk("%c%cF2FS-fs (%s): %pV\n", + KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf); + + va_end(args); +} + +#if IS_ENABLED(CONFIG_UNICODE) +static const struct f2fs_sb_encodings { + __u16 magic; + char *name; + unsigned int version; +} f2fs_sb_encoding_map[] = { + {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, +}; + +static const struct f2fs_sb_encodings * +f2fs_sb_read_encoding(const struct f2fs_super_block *sb) +{ + __u16 magic = le16_to_cpu(sb->s_encoding); + int i; + + for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++) + if (magic == f2fs_sb_encoding_map[i].magic) + return &f2fs_sb_encoding_map[i]; + + return NULL; +} + +struct kmem_cache *f2fs_cf_name_slab; +static int __init f2fs_create_casefold_cache(void) +{ + f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name", + F2FS_NAME_LEN); + if (!f2fs_cf_name_slab) + return -ENOMEM; + return 0; +} + +static void f2fs_destroy_casefold_cache(void) +{ + kmem_cache_destroy(f2fs_cf_name_slab); +} +#else +static int __init f2fs_create_casefold_cache(void) { return 0; } +static void f2fs_destroy_casefold_cache(void) { } +#endif + +static inline void limit_reserve_root(struct f2fs_sb_info *sbi) +{ + block_t limit = min((sbi->user_block_count >> 3), + sbi->user_block_count - sbi->reserved_blocks); + + /* limit is 12.5% */ + if (test_opt(sbi, RESERVE_ROOT) && + F2FS_OPTION(sbi).root_reserved_blocks > limit) { + F2FS_OPTION(sbi).root_reserved_blocks = limit; + f2fs_info(sbi, "Reduce reserved blocks for root = %u", + F2FS_OPTION(sbi).root_reserved_blocks); + } + if (!test_opt(sbi, RESERVE_ROOT) && + (!uid_eq(F2FS_OPTION(sbi).s_resuid, + make_kuid(&init_user_ns, F2FS_DEF_RESUID)) || + !gid_eq(F2FS_OPTION(sbi).s_resgid, + make_kgid(&init_user_ns, F2FS_DEF_RESGID)))) + f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root", + from_kuid_munged(&init_user_ns, + F2FS_OPTION(sbi).s_resuid), + from_kgid_munged(&init_user_ns, + F2FS_OPTION(sbi).s_resgid)); +} + +static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi) +{ + unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec; + unsigned int avg_vblocks; + unsigned int wanted_reserved_segments; + block_t avail_user_block_count; + + if (!F2FS_IO_ALIGNED(sbi)) + return 0; + + /* average valid block count in section in worst case */ + avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi); + + /* + * we need enough free space when migrating one section in worst case + */ + wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) * + reserved_segments(sbi); + wanted_reserved_segments -= reserved_segments(sbi); + + avail_user_block_count = sbi->user_block_count - + sbi->current_reserved_blocks - + F2FS_OPTION(sbi).root_reserved_blocks; + + if (wanted_reserved_segments * sbi->blocks_per_seg > + avail_user_block_count) { + f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u", + wanted_reserved_segments, + avail_user_block_count >> sbi->log_blocks_per_seg); + return -ENOSPC; + } + + SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments; + + f2fs_info(sbi, "IO align feature needs additional reserved segment: %u", + wanted_reserved_segments); + + return 0; +} + +static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi) +{ + if (!F2FS_OPTION(sbi).unusable_cap_perc) + return; + + if (F2FS_OPTION(sbi).unusable_cap_perc == 100) + F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count; + else + F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) * + F2FS_OPTION(sbi).unusable_cap_perc; + + f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%", + F2FS_OPTION(sbi).unusable_cap, + F2FS_OPTION(sbi).unusable_cap_perc); +} + +static void init_once(void *foo) +{ + struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; + + inode_init_once(&fi->vfs_inode); +} + +#ifdef CONFIG_QUOTA +static const char * const quotatypes[] = INITQFNAMES; +#define QTYPE2NAME(t) (quotatypes[t]) +static int f2fs_set_qf_name(struct super_block *sb, int qtype, + substring_t *args) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + char *qname; + int ret = -EINVAL; + + if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) { + f2fs_err(sbi, "Cannot change journaled quota options when quota turned on"); + return -EINVAL; + } + if (f2fs_sb_has_quota_ino(sbi)) { + f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name"); + return 0; + } + + qname = match_strdup(args); + if (!qname) { + f2fs_err(sbi, "Not enough memory for storing quotafile name"); + return -ENOMEM; + } + if (F2FS_OPTION(sbi).s_qf_names[qtype]) { + if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0) + ret = 0; + else + f2fs_err(sbi, "%s quota file already specified", + QTYPE2NAME(qtype)); + goto errout; + } + if (strchr(qname, '/')) { + f2fs_err(sbi, "quotafile must be on filesystem root"); + goto errout; + } + F2FS_OPTION(sbi).s_qf_names[qtype] = qname; + set_opt(sbi, QUOTA); + return 0; +errout: + kfree(qname); + return ret; +} + +static int f2fs_clear_qf_name(struct super_block *sb, int qtype) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + + if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) { + f2fs_err(sbi, "Cannot change journaled quota options when quota turned on"); + return -EINVAL; + } + kfree(F2FS_OPTION(sbi).s_qf_names[qtype]); + F2FS_OPTION(sbi).s_qf_names[qtype] = NULL; + return 0; +} + +static int f2fs_check_quota_options(struct f2fs_sb_info *sbi) +{ + /* + * We do the test below only for project quotas. 'usrquota' and + * 'grpquota' mount options are allowed even without quota feature + * to support legacy quotas in quota files. + */ + if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) { + f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement."); + return -1; + } + if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] || + F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] || + F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) { + if (test_opt(sbi, USRQUOTA) && + F2FS_OPTION(sbi).s_qf_names[USRQUOTA]) + clear_opt(sbi, USRQUOTA); + + if (test_opt(sbi, GRPQUOTA) && + F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]) + clear_opt(sbi, GRPQUOTA); + + if (test_opt(sbi, PRJQUOTA) && + F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) + clear_opt(sbi, PRJQUOTA); + + if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) || + test_opt(sbi, PRJQUOTA)) { + f2fs_err(sbi, "old and new quota format mixing"); + return -1; + } + + if (!F2FS_OPTION(sbi).s_jquota_fmt) { + f2fs_err(sbi, "journaled quota format not specified"); + return -1; + } + } + + if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) { + f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt"); + F2FS_OPTION(sbi).s_jquota_fmt = 0; + } + return 0; +} +#endif + +static int f2fs_set_test_dummy_encryption(struct super_block *sb, + const char *opt, + const substring_t *arg, + bool is_remount) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct fs_parameter param = { + .type = fs_value_is_string, + .string = arg->from ? arg->from : "", + }; + struct fscrypt_dummy_policy *policy = + &F2FS_OPTION(sbi).dummy_enc_policy; + int err; + + if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) { + f2fs_warn(sbi, "test_dummy_encryption option not supported"); + return -EINVAL; + } + + if (!f2fs_sb_has_encrypt(sbi)) { + f2fs_err(sbi, "Encrypt feature is off"); + return -EINVAL; + } + + /* + * This mount option is just for testing, and it's not worthwhile to + * implement the extra complexity (e.g. RCU protection) that would be + * needed to allow it to be set or changed during remount. We do allow + * it to be specified during remount, but only if there is no change. + */ + if (is_remount && !fscrypt_is_dummy_policy_set(policy)) { + f2fs_warn(sbi, "Can't set test_dummy_encryption on remount"); + return -EINVAL; + } + + err = fscrypt_parse_test_dummy_encryption(¶m, policy); + if (err) { + if (err == -EEXIST) + f2fs_warn(sbi, + "Can't change test_dummy_encryption on remount"); + else if (err == -EINVAL) + f2fs_warn(sbi, "Value of option \"%s\" is unrecognized", + opt); + else + f2fs_warn(sbi, "Error processing option \"%s\" [%d]", + opt, err); + return -EINVAL; + } + err = fscrypt_add_test_dummy_key(sb, policy); + if (err) { + f2fs_warn(sbi, "Error adding test dummy encryption key [%d]", + err); + return err; + } + f2fs_warn(sbi, "Test dummy encryption mode enabled"); + return 0; +} + +#ifdef CONFIG_F2FS_FS_COMPRESSION +static bool is_compress_extension_exist(struct f2fs_sb_info *sbi, + const char *new_ext, bool is_ext) +{ + unsigned char (*ext)[F2FS_EXTENSION_LEN]; + int ext_cnt; + int i; + + if (is_ext) { + ext = F2FS_OPTION(sbi).extensions; + ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt; + } else { + ext = F2FS_OPTION(sbi).noextensions; + ext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt; + } + + for (i = 0; i < ext_cnt; i++) { + if (!strcasecmp(new_ext, ext[i])) + return true; + } + + return false; +} + +/* + * 1. The same extension name cannot not appear in both compress and non-compress extension + * at the same time. + * 2. If the compress extension specifies all files, the types specified by the non-compress + * extension will be treated as special cases and will not be compressed. + * 3. Don't allow the non-compress extension specifies all files. + */ +static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi) +{ + unsigned char (*ext)[F2FS_EXTENSION_LEN]; + unsigned char (*noext)[F2FS_EXTENSION_LEN]; + int ext_cnt, noext_cnt, index = 0, no_index = 0; + + ext = F2FS_OPTION(sbi).extensions; + ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt; + noext = F2FS_OPTION(sbi).noextensions; + noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt; + + if (!noext_cnt) + return 0; + + for (no_index = 0; no_index < noext_cnt; no_index++) { + if (!strcasecmp("*", noext[no_index])) { + f2fs_info(sbi, "Don't allow the nocompress extension specifies all files"); + return -EINVAL; + } + for (index = 0; index < ext_cnt; index++) { + if (!strcasecmp(ext[index], noext[no_index])) { + f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension", + ext[index]); + return -EINVAL; + } + } + } + return 0; +} + +#ifdef CONFIG_F2FS_FS_LZ4 +static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str) +{ +#ifdef CONFIG_F2FS_FS_LZ4HC + unsigned int level; + + if (strlen(str) == 3) { + F2FS_OPTION(sbi).compress_level = 0; + return 0; + } + + str += 3; + + if (str[0] != ':') { + f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>"); + return -EINVAL; + } + if (kstrtouint(str + 1, 10, &level)) + return -EINVAL; + + if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) { + f2fs_info(sbi, "invalid lz4hc compress level: %d", level); + return -EINVAL; + } + + F2FS_OPTION(sbi).compress_level = level; + return 0; +#else + if (strlen(str) == 3) { + F2FS_OPTION(sbi).compress_level = 0; + return 0; + } + f2fs_info(sbi, "kernel doesn't support lz4hc compression"); + return -EINVAL; +#endif +} +#endif + +#ifdef CONFIG_F2FS_FS_ZSTD +static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str) +{ + unsigned int level; + int len = 4; + + if (strlen(str) == len) { + F2FS_OPTION(sbi).compress_level = F2FS_ZSTD_DEFAULT_CLEVEL; + return 0; + } + + str += len; + + if (str[0] != ':') { + f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>"); + return -EINVAL; + } + if (kstrtouint(str + 1, 10, &level)) + return -EINVAL; + + if (level < zstd_min_clevel() || level > zstd_max_clevel()) { + f2fs_info(sbi, "invalid zstd compress level: %d", level); + return -EINVAL; + } + + F2FS_OPTION(sbi).compress_level = level; + return 0; +} +#endif +#endif + +static int parse_options(struct super_block *sb, char *options, bool is_remount) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + substring_t args[MAX_OPT_ARGS]; +#ifdef CONFIG_F2FS_FS_COMPRESSION + unsigned char (*ext)[F2FS_EXTENSION_LEN]; + unsigned char (*noext)[F2FS_EXTENSION_LEN]; + int ext_cnt, noext_cnt; +#endif + char *p, *name; + int arg = 0; + kuid_t uid; + kgid_t gid; + int ret; + + if (!options) + goto default_check; + + while ((p = strsep(&options, ",")) != NULL) { + int token; + + if (!*p) + continue; + /* + * Initialize args struct so we know whether arg was + * found; some options take optional arguments. + */ + args[0].to = args[0].from = NULL; + token = match_token(p, f2fs_tokens, args); + + switch (token) { + case Opt_gc_background: + name = match_strdup(&args[0]); + + if (!name) + return -ENOMEM; + if (!strcmp(name, "on")) { + F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON; + } else if (!strcmp(name, "off")) { + F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF; + } else if (!strcmp(name, "sync")) { + F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; + case Opt_disable_roll_forward: + set_opt(sbi, DISABLE_ROLL_FORWARD); + break; + case Opt_norecovery: + /* this option mounts f2fs with ro */ + set_opt(sbi, NORECOVERY); + if (!f2fs_readonly(sb)) + return -EINVAL; + break; + case Opt_discard: + if (!f2fs_hw_support_discard(sbi)) { + f2fs_warn(sbi, "device does not support discard"); + break; + } + set_opt(sbi, DISCARD); + break; + case Opt_nodiscard: + if (f2fs_hw_should_discard(sbi)) { + f2fs_warn(sbi, "discard is required for zoned block devices"); + return -EINVAL; + } + clear_opt(sbi, DISCARD); + break; + case Opt_noheap: + set_opt(sbi, NOHEAP); + break; + case Opt_heap: + clear_opt(sbi, NOHEAP); + break; +#ifdef CONFIG_F2FS_FS_XATTR + case Opt_user_xattr: + set_opt(sbi, XATTR_USER); + break; + case Opt_nouser_xattr: + clear_opt(sbi, XATTR_USER); + break; + case Opt_inline_xattr: + set_opt(sbi, INLINE_XATTR); + break; + case Opt_noinline_xattr: + clear_opt(sbi, INLINE_XATTR); + break; + case Opt_inline_xattr_size: + if (args->from && match_int(args, &arg)) + return -EINVAL; + set_opt(sbi, INLINE_XATTR_SIZE); + F2FS_OPTION(sbi).inline_xattr_size = arg; + break; +#else + case Opt_user_xattr: + f2fs_info(sbi, "user_xattr options not supported"); + break; + case Opt_nouser_xattr: + f2fs_info(sbi, "nouser_xattr options not supported"); + break; + case Opt_inline_xattr: + f2fs_info(sbi, "inline_xattr options not supported"); + break; + case Opt_noinline_xattr: + f2fs_info(sbi, "noinline_xattr options not supported"); + break; +#endif +#ifdef CONFIG_F2FS_FS_POSIX_ACL + case Opt_acl: + set_opt(sbi, POSIX_ACL); + break; + case Opt_noacl: + clear_opt(sbi, POSIX_ACL); + break; +#else + case Opt_acl: + f2fs_info(sbi, "acl options not supported"); + break; + case Opt_noacl: + f2fs_info(sbi, "noacl options not supported"); + break; +#endif + case Opt_active_logs: + if (args->from && match_int(args, &arg)) + return -EINVAL; + if (arg != 2 && arg != 4 && + arg != NR_CURSEG_PERSIST_TYPE) + return -EINVAL; + F2FS_OPTION(sbi).active_logs = arg; + break; + case Opt_disable_ext_identify: + set_opt(sbi, DISABLE_EXT_IDENTIFY); + break; + case Opt_inline_data: + set_opt(sbi, INLINE_DATA); + break; + case Opt_inline_dentry: + set_opt(sbi, INLINE_DENTRY); + break; + case Opt_noinline_dentry: + clear_opt(sbi, INLINE_DENTRY); + break; + case Opt_flush_merge: + set_opt(sbi, FLUSH_MERGE); + break; + case Opt_noflush_merge: + clear_opt(sbi, FLUSH_MERGE); + break; + case Opt_nobarrier: + set_opt(sbi, NOBARRIER); + break; + case Opt_fastboot: + set_opt(sbi, FASTBOOT); + break; + case Opt_extent_cache: + set_opt(sbi, READ_EXTENT_CACHE); + break; + case Opt_noextent_cache: + clear_opt(sbi, READ_EXTENT_CACHE); + break; + case Opt_noinline_data: + clear_opt(sbi, INLINE_DATA); + break; + case Opt_data_flush: + set_opt(sbi, DATA_FLUSH); + break; + case Opt_reserve_root: + if (args->from && match_int(args, &arg)) + return -EINVAL; + if (test_opt(sbi, RESERVE_ROOT)) { + f2fs_info(sbi, "Preserve previous reserve_root=%u", + F2FS_OPTION(sbi).root_reserved_blocks); + } else { + F2FS_OPTION(sbi).root_reserved_blocks = arg; + set_opt(sbi, RESERVE_ROOT); + } + break; + case Opt_resuid: + if (args->from && match_int(args, &arg)) + return -EINVAL; + uid = make_kuid(current_user_ns(), arg); + if (!uid_valid(uid)) { + f2fs_err(sbi, "Invalid uid value %d", arg); + return -EINVAL; + } + F2FS_OPTION(sbi).s_resuid = uid; + break; + case Opt_resgid: + if (args->from && match_int(args, &arg)) + return -EINVAL; + gid = make_kgid(current_user_ns(), arg); + if (!gid_valid(gid)) { + f2fs_err(sbi, "Invalid gid value %d", arg); + return -EINVAL; + } + F2FS_OPTION(sbi).s_resgid = gid; + break; + case Opt_mode: + name = match_strdup(&args[0]); + + if (!name) + return -ENOMEM; + if (!strcmp(name, "adaptive")) { + F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE; + } else if (!strcmp(name, "lfs")) { + F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS; + } else if (!strcmp(name, "fragment:segment")) { + F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG; + } else if (!strcmp(name, "fragment:block")) { + F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; + case Opt_io_size_bits: + if (args->from && match_int(args, &arg)) + return -EINVAL; + if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) { + f2fs_warn(sbi, "Not support %ld, larger than %d", + BIT(arg), BIO_MAX_VECS); + return -EINVAL; + } + F2FS_OPTION(sbi).write_io_size_bits = arg; + break; +#ifdef CONFIG_F2FS_FAULT_INJECTION + case Opt_fault_injection: + if (args->from && match_int(args, &arg)) + return -EINVAL; + f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE); + set_opt(sbi, FAULT_INJECTION); + break; + + case Opt_fault_type: + if (args->from && match_int(args, &arg)) + return -EINVAL; + f2fs_build_fault_attr(sbi, 0, arg); + set_opt(sbi, FAULT_INJECTION); + break; +#else + case Opt_fault_injection: + f2fs_info(sbi, "fault_injection options not supported"); + break; + + case Opt_fault_type: + f2fs_info(sbi, "fault_type options not supported"); + break; +#endif + case Opt_lazytime: + sb->s_flags |= SB_LAZYTIME; + break; + case Opt_nolazytime: + sb->s_flags &= ~SB_LAZYTIME; + break; +#ifdef CONFIG_QUOTA + case Opt_quota: + case Opt_usrquota: + set_opt(sbi, USRQUOTA); + break; + case Opt_grpquota: + set_opt(sbi, GRPQUOTA); + break; + case Opt_prjquota: + set_opt(sbi, PRJQUOTA); + break; + case Opt_usrjquota: + ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]); + if (ret) + return ret; + break; + case Opt_grpjquota: + ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]); + if (ret) + return ret; + break; + case Opt_prjjquota: + ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]); + if (ret) + return ret; + break; + case Opt_offusrjquota: + ret = f2fs_clear_qf_name(sb, USRQUOTA); + if (ret) + return ret; + break; + case Opt_offgrpjquota: + ret = f2fs_clear_qf_name(sb, GRPQUOTA); + if (ret) + return ret; + break; + case Opt_offprjjquota: + ret = f2fs_clear_qf_name(sb, PRJQUOTA); + if (ret) + return ret; + break; + case Opt_jqfmt_vfsold: + F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD; + break; + case Opt_jqfmt_vfsv0: + F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0; + break; + case Opt_jqfmt_vfsv1: + F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1; + break; + case Opt_noquota: + clear_opt(sbi, QUOTA); + clear_opt(sbi, USRQUOTA); + clear_opt(sbi, GRPQUOTA); + clear_opt(sbi, PRJQUOTA); + break; +#else + case Opt_quota: + case Opt_usrquota: + case Opt_grpquota: + case Opt_prjquota: + case Opt_usrjquota: + case Opt_grpjquota: + case Opt_prjjquota: + case Opt_offusrjquota: + case Opt_offgrpjquota: + case Opt_offprjjquota: + case Opt_jqfmt_vfsold: + case Opt_jqfmt_vfsv0: + case Opt_jqfmt_vfsv1: + case Opt_noquota: + f2fs_info(sbi, "quota operations not supported"); + break; +#endif + case Opt_alloc: + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + + if (!strcmp(name, "default")) { + F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT; + } else if (!strcmp(name, "reuse")) { + F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; + case Opt_fsync: + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + if (!strcmp(name, "posix")) { + F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX; + } else if (!strcmp(name, "strict")) { + F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT; + } else if (!strcmp(name, "nobarrier")) { + F2FS_OPTION(sbi).fsync_mode = + FSYNC_MODE_NOBARRIER; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; + case Opt_test_dummy_encryption: + ret = f2fs_set_test_dummy_encryption(sb, p, &args[0], + is_remount); + if (ret) + return ret; + break; + case Opt_inlinecrypt: +#ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT + sb->s_flags |= SB_INLINECRYPT; +#else + f2fs_info(sbi, "inline encryption not supported"); +#endif + break; + case Opt_checkpoint_disable_cap_perc: + if (args->from && match_int(args, &arg)) + return -EINVAL; + if (arg < 0 || arg > 100) + return -EINVAL; + F2FS_OPTION(sbi).unusable_cap_perc = arg; + set_opt(sbi, DISABLE_CHECKPOINT); + break; + case Opt_checkpoint_disable_cap: + if (args->from && match_int(args, &arg)) + return -EINVAL; + F2FS_OPTION(sbi).unusable_cap = arg; + set_opt(sbi, DISABLE_CHECKPOINT); + break; + case Opt_checkpoint_disable: + set_opt(sbi, DISABLE_CHECKPOINT); + break; + case Opt_checkpoint_enable: + clear_opt(sbi, DISABLE_CHECKPOINT); + break; + case Opt_checkpoint_merge: + set_opt(sbi, MERGE_CHECKPOINT); + break; + case Opt_nocheckpoint_merge: + clear_opt(sbi, MERGE_CHECKPOINT); + break; +#ifdef CONFIG_F2FS_FS_COMPRESSION + case Opt_compress_algorithm: + if (!f2fs_sb_has_compression(sbi)) { + f2fs_info(sbi, "Image doesn't support compression"); + break; + } + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + if (!strcmp(name, "lzo")) { +#ifdef CONFIG_F2FS_FS_LZO + F2FS_OPTION(sbi).compress_level = 0; + F2FS_OPTION(sbi).compress_algorithm = + COMPRESS_LZO; +#else + f2fs_info(sbi, "kernel doesn't support lzo compression"); +#endif + } else if (!strncmp(name, "lz4", 3)) { +#ifdef CONFIG_F2FS_FS_LZ4 + ret = f2fs_set_lz4hc_level(sbi, name); + if (ret) { + kfree(name); + return -EINVAL; + } + F2FS_OPTION(sbi).compress_algorithm = + COMPRESS_LZ4; +#else + f2fs_info(sbi, "kernel doesn't support lz4 compression"); +#endif + } else if (!strncmp(name, "zstd", 4)) { +#ifdef CONFIG_F2FS_FS_ZSTD + ret = f2fs_set_zstd_level(sbi, name); + if (ret) { + kfree(name); + return -EINVAL; + } + F2FS_OPTION(sbi).compress_algorithm = + COMPRESS_ZSTD; +#else + f2fs_info(sbi, "kernel doesn't support zstd compression"); +#endif + } else if (!strcmp(name, "lzo-rle")) { +#ifdef CONFIG_F2FS_FS_LZORLE + F2FS_OPTION(sbi).compress_level = 0; + F2FS_OPTION(sbi).compress_algorithm = + COMPRESS_LZORLE; +#else + f2fs_info(sbi, "kernel doesn't support lzorle compression"); +#endif + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; + case Opt_compress_log_size: + if (!f2fs_sb_has_compression(sbi)) { + f2fs_info(sbi, "Image doesn't support compression"); + break; + } + if (args->from && match_int(args, &arg)) + return -EINVAL; + if (arg < MIN_COMPRESS_LOG_SIZE || + arg > MAX_COMPRESS_LOG_SIZE) { + f2fs_err(sbi, + "Compress cluster log size is out of range"); + return -EINVAL; + } + F2FS_OPTION(sbi).compress_log_size = arg; + break; + case Opt_compress_extension: + if (!f2fs_sb_has_compression(sbi)) { + f2fs_info(sbi, "Image doesn't support compression"); + break; + } + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + + ext = F2FS_OPTION(sbi).extensions; + ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt; + + if (strlen(name) >= F2FS_EXTENSION_LEN || + ext_cnt >= COMPRESS_EXT_NUM) { + f2fs_err(sbi, + "invalid extension length/number"); + kfree(name); + return -EINVAL; + } + + if (is_compress_extension_exist(sbi, name, true)) { + kfree(name); + break; + } + + strcpy(ext[ext_cnt], name); + F2FS_OPTION(sbi).compress_ext_cnt++; + kfree(name); + break; + case Opt_nocompress_extension: + if (!f2fs_sb_has_compression(sbi)) { + f2fs_info(sbi, "Image doesn't support compression"); + break; + } + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + + noext = F2FS_OPTION(sbi).noextensions; + noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt; + + if (strlen(name) >= F2FS_EXTENSION_LEN || + noext_cnt >= COMPRESS_EXT_NUM) { + f2fs_err(sbi, + "invalid extension length/number"); + kfree(name); + return -EINVAL; + } + + if (is_compress_extension_exist(sbi, name, false)) { + kfree(name); + break; + } + + strcpy(noext[noext_cnt], name); + F2FS_OPTION(sbi).nocompress_ext_cnt++; + kfree(name); + break; + case Opt_compress_chksum: + F2FS_OPTION(sbi).compress_chksum = true; + break; + case Opt_compress_mode: + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + if (!strcmp(name, "fs")) { + F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS; + } else if (!strcmp(name, "user")) { + F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; + case Opt_compress_cache: + set_opt(sbi, COMPRESS_CACHE); + break; +#else + case Opt_compress_algorithm: + case Opt_compress_log_size: + case Opt_compress_extension: + case Opt_nocompress_extension: + case Opt_compress_chksum: + case Opt_compress_mode: + case Opt_compress_cache: + f2fs_info(sbi, "compression options not supported"); + break; +#endif + case Opt_atgc: + set_opt(sbi, ATGC); + break; + case Opt_gc_merge: + set_opt(sbi, GC_MERGE); + break; + case Opt_nogc_merge: + clear_opt(sbi, GC_MERGE); + break; + case Opt_discard_unit: + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + if (!strcmp(name, "block")) { + F2FS_OPTION(sbi).discard_unit = + DISCARD_UNIT_BLOCK; + } else if (!strcmp(name, "segment")) { + F2FS_OPTION(sbi).discard_unit = + DISCARD_UNIT_SEGMENT; + } else if (!strcmp(name, "section")) { + F2FS_OPTION(sbi).discard_unit = + DISCARD_UNIT_SECTION; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; + case Opt_memory_mode: + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + if (!strcmp(name, "normal")) { + F2FS_OPTION(sbi).memory_mode = + MEMORY_MODE_NORMAL; + } else if (!strcmp(name, "low")) { + F2FS_OPTION(sbi).memory_mode = + MEMORY_MODE_LOW; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; + default: + f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value", + p); + return -EINVAL; + } + } +default_check: +#ifdef CONFIG_QUOTA + if (f2fs_check_quota_options(sbi)) + return -EINVAL; +#else + if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) { + f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA"); + return -EINVAL; + } + if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) { + f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA"); + return -EINVAL; + } +#endif +#if !IS_ENABLED(CONFIG_UNICODE) + if (f2fs_sb_has_casefold(sbi)) { + f2fs_err(sbi, + "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE"); + return -EINVAL; + } +#endif + /* + * The BLKZONED feature indicates that the drive was formatted with + * zone alignment optimization. This is optional for host-aware + * devices, but mandatory for host-managed zoned block devices. + */ + if (f2fs_sb_has_blkzoned(sbi)) { +#ifdef CONFIG_BLK_DEV_ZONED + if (F2FS_OPTION(sbi).discard_unit != + DISCARD_UNIT_SECTION) { + f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default"); + F2FS_OPTION(sbi).discard_unit = + DISCARD_UNIT_SECTION; + } + + if (F2FS_OPTION(sbi).fs_mode != FS_MODE_LFS) { + f2fs_info(sbi, "Only lfs mode is allowed with zoned block device feature"); + return -EINVAL; + } +#else + f2fs_err(sbi, "Zoned block device support is not enabled"); + return -EINVAL; +#endif + } + +#ifdef CONFIG_F2FS_FS_COMPRESSION + if (f2fs_test_compress_extension(sbi)) { + f2fs_err(sbi, "invalid compress or nocompress extension"); + return -EINVAL; + } +#endif + + if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) { + f2fs_err(sbi, "Should set mode=lfs with %luKB-sized IO", + F2FS_IO_SIZE_KB(sbi)); + return -EINVAL; + } + + if (test_opt(sbi, INLINE_XATTR_SIZE)) { + int min_size, max_size; + + if (!f2fs_sb_has_extra_attr(sbi) || + !f2fs_sb_has_flexible_inline_xattr(sbi)) { + f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off"); + return -EINVAL; + } + if (!test_opt(sbi, INLINE_XATTR)) { + f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option"); + return -EINVAL; + } + + min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32); + max_size = MAX_INLINE_XATTR_SIZE; + + if (F2FS_OPTION(sbi).inline_xattr_size < min_size || + F2FS_OPTION(sbi).inline_xattr_size > max_size) { + f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d", + min_size, max_size); + return -EINVAL; + } + } + + if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) { + f2fs_err(sbi, "LFS not compatible with checkpoint=disable"); + return -EINVAL; + } + + if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) { + f2fs_err(sbi, "LFS not compatible with ATGC"); + return -EINVAL; + } + + if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) { + f2fs_err(sbi, "Allow to mount readonly mode only"); + return -EROFS; + } + return 0; +} + +static struct inode *f2fs_alloc_inode(struct super_block *sb) +{ + struct f2fs_inode_info *fi; + + if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC)) { + f2fs_show_injection_info(F2FS_SB(sb), FAULT_SLAB_ALLOC); + return NULL; + } + + fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO); + if (!fi) + return NULL; + + init_once((void *) fi); + + /* Initialize f2fs-specific inode info */ + atomic_set(&fi->dirty_pages, 0); + atomic_set(&fi->i_compr_blocks, 0); + init_f2fs_rwsem(&fi->i_sem); + spin_lock_init(&fi->i_size_lock); + INIT_LIST_HEAD(&fi->dirty_list); + INIT_LIST_HEAD(&fi->gdirty_list); + init_f2fs_rwsem(&fi->i_gc_rwsem[READ]); + init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]); + init_f2fs_rwsem(&fi->i_xattr_sem); + + /* Will be used by directory only */ + fi->i_dir_level = F2FS_SB(sb)->dir_level; + + return &fi->vfs_inode; +} + +static int f2fs_drop_inode(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + int ret; + + /* + * during filesystem shutdown, if checkpoint is disabled, + * drop useless meta/node dirty pages. + */ + if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { + if (inode->i_ino == F2FS_NODE_INO(sbi) || + inode->i_ino == F2FS_META_INO(sbi)) { + trace_f2fs_drop_inode(inode, 1); + return 1; + } + } + + /* + * This is to avoid a deadlock condition like below. + * writeback_single_inode(inode) + * - f2fs_write_data_page + * - f2fs_gc -> iput -> evict + * - inode_wait_for_writeback(inode) + */ + if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) { + if (!inode->i_nlink && !is_bad_inode(inode)) { + /* to avoid evict_inode call simultaneously */ + atomic_inc(&inode->i_count); + spin_unlock(&inode->i_lock); + + /* should remain fi->extent_tree for writepage */ + f2fs_destroy_extent_node(inode); + + sb_start_intwrite(inode->i_sb); + f2fs_i_size_write(inode, 0); + + f2fs_submit_merged_write_cond(F2FS_I_SB(inode), + inode, NULL, 0, DATA); + truncate_inode_pages_final(inode->i_mapping); + + if (F2FS_HAS_BLOCKS(inode)) + f2fs_truncate(inode); + + sb_end_intwrite(inode->i_sb); + + spin_lock(&inode->i_lock); + atomic_dec(&inode->i_count); + } + trace_f2fs_drop_inode(inode, 0); + return 0; + } + ret = generic_drop_inode(inode); + if (!ret) + ret = fscrypt_drop_inode(inode); + trace_f2fs_drop_inode(inode, ret); + return ret; +} + +int f2fs_inode_dirtied(struct inode *inode, bool sync) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + int ret = 0; + + spin_lock(&sbi->inode_lock[DIRTY_META]); + if (is_inode_flag_set(inode, FI_DIRTY_INODE)) { + ret = 1; + } else { + set_inode_flag(inode, FI_DIRTY_INODE); + stat_inc_dirty_inode(sbi, DIRTY_META); + } + if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) { + list_add_tail(&F2FS_I(inode)->gdirty_list, + &sbi->inode_list[DIRTY_META]); + inc_page_count(sbi, F2FS_DIRTY_IMETA); + } + spin_unlock(&sbi->inode_lock[DIRTY_META]); + return ret; +} + +void f2fs_inode_synced(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + + spin_lock(&sbi->inode_lock[DIRTY_META]); + if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) { + spin_unlock(&sbi->inode_lock[DIRTY_META]); + return; + } + if (!list_empty(&F2FS_I(inode)->gdirty_list)) { + list_del_init(&F2FS_I(inode)->gdirty_list); + dec_page_count(sbi, F2FS_DIRTY_IMETA); + } + clear_inode_flag(inode, FI_DIRTY_INODE); + clear_inode_flag(inode, FI_AUTO_RECOVER); + stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META); + spin_unlock(&sbi->inode_lock[DIRTY_META]); +} + +/* + * f2fs_dirty_inode() is called from __mark_inode_dirty() + * + * We should call set_dirty_inode to write the dirty inode through write_inode. + */ +static void f2fs_dirty_inode(struct inode *inode, int flags) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + + if (inode->i_ino == F2FS_NODE_INO(sbi) || + inode->i_ino == F2FS_META_INO(sbi)) + return; + + if (is_inode_flag_set(inode, FI_AUTO_RECOVER)) + clear_inode_flag(inode, FI_AUTO_RECOVER); + + f2fs_inode_dirtied(inode, false); +} + +static void f2fs_free_inode(struct inode *inode) +{ + fscrypt_free_inode(inode); + kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); +} + +static void destroy_percpu_info(struct f2fs_sb_info *sbi) +{ + percpu_counter_destroy(&sbi->total_valid_inode_count); + percpu_counter_destroy(&sbi->rf_node_block_count); + percpu_counter_destroy(&sbi->alloc_valid_block_count); +} + +static void destroy_device_list(struct f2fs_sb_info *sbi) +{ + int i; + + for (i = 0; i < sbi->s_ndevs; i++) { + blkdev_put(FDEV(i).bdev, FMODE_EXCL); +#ifdef CONFIG_BLK_DEV_ZONED + kvfree(FDEV(i).blkz_seq); +#endif + } + kvfree(sbi->devs); +} + +static void f2fs_put_super(struct super_block *sb) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + int i; + bool dropped; + + /* unregister procfs/sysfs entries in advance to avoid race case */ + f2fs_unregister_sysfs(sbi); + + f2fs_quota_off_umount(sb); + + /* prevent remaining shrinker jobs */ + mutex_lock(&sbi->umount_mutex); + + /* + * flush all issued checkpoints and stop checkpoint issue thread. + * after then, all checkpoints should be done by each process context. + */ + f2fs_stop_ckpt_thread(sbi); + + /* + * We don't need to do checkpoint when superblock is clean. + * But, the previous checkpoint was not done by umount, it needs to do + * clean checkpoint again. + */ + if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) || + !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) { + struct cp_control cpc = { + .reason = CP_UMOUNT, + }; + f2fs_write_checkpoint(sbi, &cpc); + } + + /* be sure to wait for any on-going discard commands */ + dropped = f2fs_issue_discard_timeout(sbi); + + if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) && + !sbi->discard_blks && !dropped) { + struct cp_control cpc = { + .reason = CP_UMOUNT | CP_TRIMMED, + }; + f2fs_write_checkpoint(sbi, &cpc); + } + + /* + * normally superblock is clean, so we need to release this. + * In addition, EIO will skip do checkpoint, we need this as well. + */ + f2fs_release_ino_entry(sbi, true); + + f2fs_leave_shrinker(sbi); + mutex_unlock(&sbi->umount_mutex); + + /* our cp_error case, we can wait for any writeback page */ + f2fs_flush_merged_writes(sbi); + + f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA); + + f2fs_bug_on(sbi, sbi->fsync_node_num); + + f2fs_destroy_compress_inode(sbi); + + iput(sbi->node_inode); + sbi->node_inode = NULL; + + iput(sbi->meta_inode); + sbi->meta_inode = NULL; + + /* + * iput() can update stat information, if f2fs_write_checkpoint() + * above failed with error. + */ + f2fs_destroy_stats(sbi); + + /* destroy f2fs internal modules */ + f2fs_destroy_node_manager(sbi); + f2fs_destroy_segment_manager(sbi); + + f2fs_destroy_post_read_wq(sbi); + + kvfree(sbi->ckpt); + + sb->s_fs_info = NULL; + if (sbi->s_chksum_driver) + crypto_free_shash(sbi->s_chksum_driver); + kfree(sbi->raw_super); + + destroy_device_list(sbi); + f2fs_destroy_page_array_cache(sbi); + f2fs_destroy_xattr_caches(sbi); + mempool_destroy(sbi->write_io_dummy); +#ifdef CONFIG_QUOTA + for (i = 0; i < MAXQUOTAS; i++) + kfree(F2FS_OPTION(sbi).s_qf_names[i]); +#endif + fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy); + destroy_percpu_info(sbi); + f2fs_destroy_iostat(sbi); + for (i = 0; i < NR_PAGE_TYPE; i++) + kvfree(sbi->write_io[i]); +#if IS_ENABLED(CONFIG_UNICODE) + utf8_unload(sb->s_encoding); +#endif + kfree(sbi); +} + +int f2fs_sync_fs(struct super_block *sb, int sync) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + int err = 0; + + if (unlikely(f2fs_cp_error(sbi))) + return 0; + if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) + return 0; + + trace_f2fs_sync_fs(sb, sync); + + if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) + return -EAGAIN; + + if (sync) + err = f2fs_issue_checkpoint(sbi); + + return err; +} + +static int f2fs_freeze(struct super_block *sb) +{ + if (f2fs_readonly(sb)) + return 0; + + /* IO error happened before */ + if (unlikely(f2fs_cp_error(F2FS_SB(sb)))) + return -EIO; + + /* must be clean, since sync_filesystem() was already called */ + if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY)) + return -EINVAL; + + /* Let's flush checkpoints and stop the thread. */ + f2fs_flush_ckpt_thread(F2FS_SB(sb)); + + /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */ + set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING); + return 0; +} + +static int f2fs_unfreeze(struct super_block *sb) +{ + clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING); + return 0; +} + +#ifdef CONFIG_QUOTA +static int f2fs_statfs_project(struct super_block *sb, + kprojid_t projid, struct kstatfs *buf) +{ + struct kqid qid; + struct dquot *dquot; + u64 limit; + u64 curblock; + + qid = make_kqid_projid(projid); + dquot = dqget(sb, qid); + if (IS_ERR(dquot)) + return PTR_ERR(dquot); + spin_lock(&dquot->dq_dqb_lock); + + limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, + dquot->dq_dqb.dqb_bhardlimit); + if (limit) + limit >>= sb->s_blocksize_bits; + + if (limit && buf->f_blocks > limit) { + curblock = (dquot->dq_dqb.dqb_curspace + + dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; + buf->f_blocks = limit; + buf->f_bfree = buf->f_bavail = + (buf->f_blocks > curblock) ? + (buf->f_blocks - curblock) : 0; + } + + limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, + dquot->dq_dqb.dqb_ihardlimit); + + if (limit && buf->f_files > limit) { + buf->f_files = limit; + buf->f_ffree = + (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? + (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; + } + + spin_unlock(&dquot->dq_dqb_lock); + dqput(dquot); + return 0; +} +#endif + +static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) +{ + struct super_block *sb = dentry->d_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + u64 id = huge_encode_dev(sb->s_bdev->bd_dev); + block_t total_count, user_block_count, start_count; + u64 avail_node_count; + unsigned int total_valid_node_count; + + total_count = le64_to_cpu(sbi->raw_super->block_count); + start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); + buf->f_type = F2FS_SUPER_MAGIC; + buf->f_bsize = sbi->blocksize; + + buf->f_blocks = total_count - start_count; + + spin_lock(&sbi->stat_lock); + + user_block_count = sbi->user_block_count; + total_valid_node_count = valid_node_count(sbi); + avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; + buf->f_bfree = user_block_count - valid_user_blocks(sbi) - + sbi->current_reserved_blocks; + + if (unlikely(buf->f_bfree <= sbi->unusable_block_count)) + buf->f_bfree = 0; + else + buf->f_bfree -= sbi->unusable_block_count; + spin_unlock(&sbi->stat_lock); + + if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks) + buf->f_bavail = buf->f_bfree - + F2FS_OPTION(sbi).root_reserved_blocks; + else + buf->f_bavail = 0; + + if (avail_node_count > user_block_count) { + buf->f_files = user_block_count; + buf->f_ffree = buf->f_bavail; + } else { + buf->f_files = avail_node_count; + buf->f_ffree = min(avail_node_count - total_valid_node_count, + buf->f_bavail); + } + + buf->f_namelen = F2FS_NAME_LEN; + buf->f_fsid = u64_to_fsid(id); + +#ifdef CONFIG_QUOTA + if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) && + sb_has_quota_limits_enabled(sb, PRJQUOTA)) { + f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf); + } +#endif + return 0; +} + +static inline void f2fs_show_quota_options(struct seq_file *seq, + struct super_block *sb) +{ +#ifdef CONFIG_QUOTA + struct f2fs_sb_info *sbi = F2FS_SB(sb); + + if (F2FS_OPTION(sbi).s_jquota_fmt) { + char *fmtname = ""; + + switch (F2FS_OPTION(sbi).s_jquota_fmt) { + case QFMT_VFS_OLD: + fmtname = "vfsold"; + break; + case QFMT_VFS_V0: + fmtname = "vfsv0"; + break; + case QFMT_VFS_V1: + fmtname = "vfsv1"; + break; + } + seq_printf(seq, ",jqfmt=%s", fmtname); + } + + if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA]) + seq_show_option(seq, "usrjquota", + F2FS_OPTION(sbi).s_qf_names[USRQUOTA]); + + if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]) + seq_show_option(seq, "grpjquota", + F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]); + + if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) + seq_show_option(seq, "prjjquota", + F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]); +#endif +} + +#ifdef CONFIG_F2FS_FS_COMPRESSION +static inline void f2fs_show_compress_options(struct seq_file *seq, + struct super_block *sb) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + char *algtype = ""; + int i; + + if (!f2fs_sb_has_compression(sbi)) + return; + + switch (F2FS_OPTION(sbi).compress_algorithm) { + case COMPRESS_LZO: + algtype = "lzo"; + break; + case COMPRESS_LZ4: + algtype = "lz4"; + break; + case COMPRESS_ZSTD: + algtype = "zstd"; + break; + case COMPRESS_LZORLE: + algtype = "lzo-rle"; + break; + } + seq_printf(seq, ",compress_algorithm=%s", algtype); + + if (F2FS_OPTION(sbi).compress_level) + seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level); + + seq_printf(seq, ",compress_log_size=%u", + F2FS_OPTION(sbi).compress_log_size); + + for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) { + seq_printf(seq, ",compress_extension=%s", + F2FS_OPTION(sbi).extensions[i]); + } + + for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) { + seq_printf(seq, ",nocompress_extension=%s", + F2FS_OPTION(sbi).noextensions[i]); + } + + if (F2FS_OPTION(sbi).compress_chksum) + seq_puts(seq, ",compress_chksum"); + + if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS) + seq_printf(seq, ",compress_mode=%s", "fs"); + else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER) + seq_printf(seq, ",compress_mode=%s", "user"); + + if (test_opt(sbi, COMPRESS_CACHE)) + seq_puts(seq, ",compress_cache"); +} +#endif + +static int f2fs_show_options(struct seq_file *seq, struct dentry *root) +{ + struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); + + if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC) + seq_printf(seq, ",background_gc=%s", "sync"); + else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON) + seq_printf(seq, ",background_gc=%s", "on"); + else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF) + seq_printf(seq, ",background_gc=%s", "off"); + + if (test_opt(sbi, GC_MERGE)) + seq_puts(seq, ",gc_merge"); + + if (test_opt(sbi, DISABLE_ROLL_FORWARD)) + seq_puts(seq, ",disable_roll_forward"); + if (test_opt(sbi, NORECOVERY)) + seq_puts(seq, ",norecovery"); + if (test_opt(sbi, DISCARD)) + seq_puts(seq, ",discard"); + else + seq_puts(seq, ",nodiscard"); + if (test_opt(sbi, NOHEAP)) + seq_puts(seq, ",no_heap"); + else + seq_puts(seq, ",heap"); +#ifdef CONFIG_F2FS_FS_XATTR + if (test_opt(sbi, XATTR_USER)) + seq_puts(seq, ",user_xattr"); + else + seq_puts(seq, ",nouser_xattr"); + if (test_opt(sbi, INLINE_XATTR)) + seq_puts(seq, ",inline_xattr"); + else + seq_puts(seq, ",noinline_xattr"); + if (test_opt(sbi, INLINE_XATTR_SIZE)) + seq_printf(seq, ",inline_xattr_size=%u", + F2FS_OPTION(sbi).inline_xattr_size); +#endif +#ifdef CONFIG_F2FS_FS_POSIX_ACL + if (test_opt(sbi, POSIX_ACL)) + seq_puts(seq, ",acl"); + else + seq_puts(seq, ",noacl"); +#endif + if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) + seq_puts(seq, ",disable_ext_identify"); + if (test_opt(sbi, INLINE_DATA)) + seq_puts(seq, ",inline_data"); + else + seq_puts(seq, ",noinline_data"); + if (test_opt(sbi, INLINE_DENTRY)) + seq_puts(seq, ",inline_dentry"); + else + seq_puts(seq, ",noinline_dentry"); + if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) + seq_puts(seq, ",flush_merge"); + if (test_opt(sbi, NOBARRIER)) + seq_puts(seq, ",nobarrier"); + if (test_opt(sbi, FASTBOOT)) + seq_puts(seq, ",fastboot"); + if (test_opt(sbi, READ_EXTENT_CACHE)) + seq_puts(seq, ",extent_cache"); + else + seq_puts(seq, ",noextent_cache"); + if (test_opt(sbi, DATA_FLUSH)) + seq_puts(seq, ",data_flush"); + + seq_puts(seq, ",mode="); + if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE) + seq_puts(seq, "adaptive"); + else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS) + seq_puts(seq, "lfs"); + else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG) + seq_puts(seq, "fragment:segment"); + else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK) + seq_puts(seq, "fragment:block"); + seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs); + if (test_opt(sbi, RESERVE_ROOT)) + seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u", + F2FS_OPTION(sbi).root_reserved_blocks, + from_kuid_munged(&init_user_ns, + F2FS_OPTION(sbi).s_resuid), + from_kgid_munged(&init_user_ns, + F2FS_OPTION(sbi).s_resgid)); + if (F2FS_IO_SIZE_BITS(sbi)) + seq_printf(seq, ",io_bits=%u", + F2FS_OPTION(sbi).write_io_size_bits); +#ifdef CONFIG_F2FS_FAULT_INJECTION + if (test_opt(sbi, FAULT_INJECTION)) { + seq_printf(seq, ",fault_injection=%u", + F2FS_OPTION(sbi).fault_info.inject_rate); + seq_printf(seq, ",fault_type=%u", + F2FS_OPTION(sbi).fault_info.inject_type); + } +#endif +#ifdef CONFIG_QUOTA + if (test_opt(sbi, QUOTA)) + seq_puts(seq, ",quota"); + if (test_opt(sbi, USRQUOTA)) + seq_puts(seq, ",usrquota"); + if (test_opt(sbi, GRPQUOTA)) + seq_puts(seq, ",grpquota"); + if (test_opt(sbi, PRJQUOTA)) + seq_puts(seq, ",prjquota"); +#endif + f2fs_show_quota_options(seq, sbi->sb); + + fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb); + + if (sbi->sb->s_flags & SB_INLINECRYPT) + seq_puts(seq, ",inlinecrypt"); + + if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT) + seq_printf(seq, ",alloc_mode=%s", "default"); + else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE) + seq_printf(seq, ",alloc_mode=%s", "reuse"); + + if (test_opt(sbi, DISABLE_CHECKPOINT)) + seq_printf(seq, ",checkpoint=disable:%u", + F2FS_OPTION(sbi).unusable_cap); + if (test_opt(sbi, MERGE_CHECKPOINT)) + seq_puts(seq, ",checkpoint_merge"); + else + seq_puts(seq, ",nocheckpoint_merge"); + if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX) + seq_printf(seq, ",fsync_mode=%s", "posix"); + else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) + seq_printf(seq, ",fsync_mode=%s", "strict"); + else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER) + seq_printf(seq, ",fsync_mode=%s", "nobarrier"); + +#ifdef CONFIG_F2FS_FS_COMPRESSION + f2fs_show_compress_options(seq, sbi->sb); +#endif + + if (test_opt(sbi, ATGC)) + seq_puts(seq, ",atgc"); + + if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK) + seq_printf(seq, ",discard_unit=%s", "block"); + else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT) + seq_printf(seq, ",discard_unit=%s", "segment"); + else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION) + seq_printf(seq, ",discard_unit=%s", "section"); + + if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL) + seq_printf(seq, ",memory=%s", "normal"); + else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW) + seq_printf(seq, ",memory=%s", "low"); + + return 0; +} + +static void default_options(struct f2fs_sb_info *sbi) +{ + /* init some FS parameters */ + if (f2fs_sb_has_readonly(sbi)) + F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE; + else + F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE; + + F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS; + F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT; + F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX; + F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID); + F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID); + F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4; + F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE; + F2FS_OPTION(sbi).compress_ext_cnt = 0; + F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS; + F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON; + F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL; + + sbi->sb->s_flags &= ~SB_INLINECRYPT; + + set_opt(sbi, INLINE_XATTR); + set_opt(sbi, INLINE_DATA); + set_opt(sbi, INLINE_DENTRY); + set_opt(sbi, READ_EXTENT_CACHE); + set_opt(sbi, NOHEAP); + clear_opt(sbi, DISABLE_CHECKPOINT); + set_opt(sbi, MERGE_CHECKPOINT); + F2FS_OPTION(sbi).unusable_cap = 0; + sbi->sb->s_flags |= SB_LAZYTIME; + set_opt(sbi, FLUSH_MERGE); + if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) + set_opt(sbi, DISCARD); + if (f2fs_sb_has_blkzoned(sbi)) { + F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS; + F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION; + } else { + F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE; + F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK; + } + +#ifdef CONFIG_F2FS_FS_XATTR + set_opt(sbi, XATTR_USER); +#endif +#ifdef CONFIG_F2FS_FS_POSIX_ACL + set_opt(sbi, POSIX_ACL); +#endif + + f2fs_build_fault_attr(sbi, 0, 0); +} + +#ifdef CONFIG_QUOTA +static int f2fs_enable_quotas(struct super_block *sb); +#endif + +static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi) +{ + unsigned int s_flags = sbi->sb->s_flags; + struct cp_control cpc; + unsigned int gc_mode = sbi->gc_mode; + int err = 0; + int ret; + block_t unusable; + + if (s_flags & SB_RDONLY) { + f2fs_err(sbi, "checkpoint=disable on readonly fs"); + return -EINVAL; + } + sbi->sb->s_flags |= SB_ACTIVE; + + /* check if we need more GC first */ + unusable = f2fs_get_unusable_blocks(sbi); + if (!f2fs_disable_cp_again(sbi, unusable)) + goto skip_gc; + + f2fs_update_time(sbi, DISABLE_TIME); + + sbi->gc_mode = GC_URGENT_HIGH; + + while (!f2fs_time_over(sbi, DISABLE_TIME)) { + struct f2fs_gc_control gc_control = { + .victim_segno = NULL_SEGNO, + .init_gc_type = FG_GC, + .should_migrate_blocks = false, + .err_gc_skipped = true, + .nr_free_secs = 1 }; + + f2fs_down_write(&sbi->gc_lock); + err = f2fs_gc(sbi, &gc_control); + if (err == -ENODATA) { + err = 0; + break; + } + if (err && err != -EAGAIN) + break; + } + + ret = sync_filesystem(sbi->sb); + if (ret || err) { + err = ret ? ret : err; + goto restore_flag; + } + + unusable = f2fs_get_unusable_blocks(sbi); + if (f2fs_disable_cp_again(sbi, unusable)) { + err = -EAGAIN; + goto restore_flag; + } + +skip_gc: + f2fs_down_write(&sbi->gc_lock); + cpc.reason = CP_PAUSE; + set_sbi_flag(sbi, SBI_CP_DISABLED); + err = f2fs_write_checkpoint(sbi, &cpc); + if (err) + goto out_unlock; + + spin_lock(&sbi->stat_lock); + sbi->unusable_block_count = unusable; + spin_unlock(&sbi->stat_lock); + +out_unlock: + f2fs_up_write(&sbi->gc_lock); +restore_flag: + sbi->gc_mode = gc_mode; + sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */ + return err; +} + +static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi) +{ + int retry = DEFAULT_RETRY_IO_COUNT; + + /* we should flush all the data to keep data consistency */ + do { + sync_inodes_sb(sbi->sb); + f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT); + } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--); + + if (unlikely(retry < 0)) + f2fs_warn(sbi, "checkpoint=enable has some unwritten data."); + + f2fs_down_write(&sbi->gc_lock); + f2fs_dirty_to_prefree(sbi); + + clear_sbi_flag(sbi, SBI_CP_DISABLED); + set_sbi_flag(sbi, SBI_IS_DIRTY); + f2fs_up_write(&sbi->gc_lock); + + f2fs_sync_fs(sbi->sb, 1); + + /* Let's ensure there's no pending checkpoint anymore */ + f2fs_flush_ckpt_thread(sbi); +} + +static int f2fs_remount(struct super_block *sb, int *flags, char *data) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct f2fs_mount_info org_mount_opt; + unsigned long old_sb_flags; + int err; + bool need_restart_gc = false, need_stop_gc = false; + bool need_restart_ckpt = false, need_stop_ckpt = false; + bool need_restart_flush = false, need_stop_flush = false; + bool need_restart_discard = false, need_stop_discard = false; + bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE); + bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT); + bool no_io_align = !F2FS_IO_ALIGNED(sbi); + bool no_atgc = !test_opt(sbi, ATGC); + bool no_discard = !test_opt(sbi, DISCARD); + bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE); + bool block_unit_discard = f2fs_block_unit_discard(sbi); + struct discard_cmd_control *dcc; +#ifdef CONFIG_QUOTA + int i, j; +#endif + + /* + * Save the old mount options in case we + * need to restore them. + */ + org_mount_opt = sbi->mount_opt; + old_sb_flags = sb->s_flags; + +#ifdef CONFIG_QUOTA + org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt; + for (i = 0; i < MAXQUOTAS; i++) { + if (F2FS_OPTION(sbi).s_qf_names[i]) { + org_mount_opt.s_qf_names[i] = + kstrdup(F2FS_OPTION(sbi).s_qf_names[i], + GFP_KERNEL); + if (!org_mount_opt.s_qf_names[i]) { + for (j = 0; j < i; j++) + kfree(org_mount_opt.s_qf_names[j]); + return -ENOMEM; + } + } else { + org_mount_opt.s_qf_names[i] = NULL; + } + } +#endif + + /* recover superblocks we couldn't write due to previous RO mount */ + if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) { + err = f2fs_commit_super(sbi, false); + f2fs_info(sbi, "Try to recover all the superblocks, ret: %d", + err); + if (!err) + clear_sbi_flag(sbi, SBI_NEED_SB_WRITE); + } + + default_options(sbi); + + /* parse mount options */ + err = parse_options(sb, data, true); + if (err) + goto restore_opts; + + /* + * Previous and new state of filesystem is RO, + * so skip checking GC and FLUSH_MERGE conditions. + */ + if (f2fs_readonly(sb) && (*flags & SB_RDONLY)) + goto skip; + + if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) { + err = -EROFS; + goto restore_opts; + } + +#ifdef CONFIG_QUOTA + if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) { + err = dquot_suspend(sb, -1); + if (err < 0) + goto restore_opts; + } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) { + /* dquot_resume needs RW */ + sb->s_flags &= ~SB_RDONLY; + if (sb_any_quota_suspended(sb)) { + dquot_resume(sb, -1); + } else if (f2fs_sb_has_quota_ino(sbi)) { + err = f2fs_enable_quotas(sb); + if (err) + goto restore_opts; + } + } +#endif + /* disallow enable atgc dynamically */ + if (no_atgc == !!test_opt(sbi, ATGC)) { + err = -EINVAL; + f2fs_warn(sbi, "switch atgc option is not allowed"); + goto restore_opts; + } + + /* disallow enable/disable extent_cache dynamically */ + if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) { + err = -EINVAL; + f2fs_warn(sbi, "switch extent_cache option is not allowed"); + goto restore_opts; + } + + if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) { + err = -EINVAL; + f2fs_warn(sbi, "switch io_bits option is not allowed"); + goto restore_opts; + } + + if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) { + err = -EINVAL; + f2fs_warn(sbi, "switch compress_cache option is not allowed"); + goto restore_opts; + } + + if (block_unit_discard != f2fs_block_unit_discard(sbi)) { + err = -EINVAL; + f2fs_warn(sbi, "switch discard_unit option is not allowed"); + goto restore_opts; + } + + if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) { + err = -EINVAL; + f2fs_warn(sbi, "disabling checkpoint not compatible with read-only"); + goto restore_opts; + } + + /* + * We stop the GC thread if FS is mounted as RO + * or if background_gc = off is passed in mount + * option. Also sync the filesystem. + */ + if ((*flags & SB_RDONLY) || + (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF && + !test_opt(sbi, GC_MERGE))) { + if (sbi->gc_thread) { + f2fs_stop_gc_thread(sbi); + need_restart_gc = true; + } + } else if (!sbi->gc_thread) { + err = f2fs_start_gc_thread(sbi); + if (err) + goto restore_opts; + need_stop_gc = true; + } + + if (*flags & SB_RDONLY) { + sync_inodes_sb(sb); + + set_sbi_flag(sbi, SBI_IS_DIRTY); + set_sbi_flag(sbi, SBI_IS_CLOSE); + f2fs_sync_fs(sb, 1); + clear_sbi_flag(sbi, SBI_IS_CLOSE); + } + + if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) || + !test_opt(sbi, MERGE_CHECKPOINT)) { + f2fs_stop_ckpt_thread(sbi); + need_restart_ckpt = true; + } else { + /* Flush if the prevous checkpoint, if exists. */ + f2fs_flush_ckpt_thread(sbi); + + err = f2fs_start_ckpt_thread(sbi); + if (err) { + f2fs_err(sbi, + "Failed to start F2FS issue_checkpoint_thread (%d)", + err); + goto restore_gc; + } + need_stop_ckpt = true; + } + + /* + * We stop issue flush thread if FS is mounted as RO + * or if flush_merge is not passed in mount option. + */ + if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { + clear_opt(sbi, FLUSH_MERGE); + f2fs_destroy_flush_cmd_control(sbi, false); + need_restart_flush = true; + } else { + err = f2fs_create_flush_cmd_control(sbi); + if (err) + goto restore_ckpt; + need_stop_flush = true; + } + + if (no_discard == !!test_opt(sbi, DISCARD)) { + if (test_opt(sbi, DISCARD)) { + err = f2fs_start_discard_thread(sbi); + if (err) + goto restore_flush; + need_stop_discard = true; + } else { + dcc = SM_I(sbi)->dcc_info; + f2fs_stop_discard_thread(sbi); + if (atomic_read(&dcc->discard_cmd_cnt)) + f2fs_issue_discard_timeout(sbi); + need_restart_discard = true; + } + } + + if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) { + if (test_opt(sbi, DISABLE_CHECKPOINT)) { + err = f2fs_disable_checkpoint(sbi); + if (err) + goto restore_discard; + } else { + f2fs_enable_checkpoint(sbi); + } + } + +skip: +#ifdef CONFIG_QUOTA + /* Release old quota file names */ + for (i = 0; i < MAXQUOTAS; i++) + kfree(org_mount_opt.s_qf_names[i]); +#endif + /* Update the POSIXACL Flag */ + sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | + (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0); + + limit_reserve_root(sbi); + adjust_unusable_cap_perc(sbi); + *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME); + return 0; +restore_discard: + if (need_restart_discard) { + if (f2fs_start_discard_thread(sbi)) + f2fs_warn(sbi, "discard has been stopped"); + } else if (need_stop_discard) { + f2fs_stop_discard_thread(sbi); + } +restore_flush: + if (need_restart_flush) { + if (f2fs_create_flush_cmd_control(sbi)) + f2fs_warn(sbi, "background flush thread has stopped"); + } else if (need_stop_flush) { + clear_opt(sbi, FLUSH_MERGE); + f2fs_destroy_flush_cmd_control(sbi, false); + } +restore_ckpt: + if (need_restart_ckpt) { + if (f2fs_start_ckpt_thread(sbi)) + f2fs_warn(sbi, "background ckpt thread has stopped"); + } else if (need_stop_ckpt) { + f2fs_stop_ckpt_thread(sbi); + } +restore_gc: + if (need_restart_gc) { + if (f2fs_start_gc_thread(sbi)) + f2fs_warn(sbi, "background gc thread has stopped"); + } else if (need_stop_gc) { + f2fs_stop_gc_thread(sbi); + } +restore_opts: +#ifdef CONFIG_QUOTA + F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt; + for (i = 0; i < MAXQUOTAS; i++) { + kfree(F2FS_OPTION(sbi).s_qf_names[i]); + F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i]; + } +#endif + sbi->mount_opt = org_mount_opt; + sb->s_flags = old_sb_flags; + return err; +} + +#ifdef CONFIG_QUOTA +/* Read data from quotafile */ +static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data, + size_t len, loff_t off) +{ + struct inode *inode = sb_dqopt(sb)->files[type]; + struct address_space *mapping = inode->i_mapping; + block_t blkidx = F2FS_BYTES_TO_BLK(off); + int offset = off & (sb->s_blocksize - 1); + int tocopy; + size_t toread; + loff_t i_size = i_size_read(inode); + struct page *page; + + if (off > i_size) + return 0; + + if (off + len > i_size) + len = i_size - off; + toread = len; + while (toread > 0) { + tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread); +repeat: + page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS); + if (IS_ERR(page)) { + if (PTR_ERR(page) == -ENOMEM) { + memalloc_retry_wait(GFP_NOFS); + goto repeat; + } + set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR); + return PTR_ERR(page); + } + + lock_page(page); + + if (unlikely(page->mapping != mapping)) { + f2fs_put_page(page, 1); + goto repeat; + } + if (unlikely(!PageUptodate(page))) { + f2fs_put_page(page, 1); + set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR); + return -EIO; + } + + memcpy_from_page(data, page, offset, tocopy); + f2fs_put_page(page, 1); + + offset = 0; + toread -= tocopy; + data += tocopy; + blkidx++; + } + return len; +} + +/* Write to quotafile */ +static ssize_t f2fs_quota_write(struct super_block *sb, int type, + const char *data, size_t len, loff_t off) +{ + struct inode *inode = sb_dqopt(sb)->files[type]; + struct address_space *mapping = inode->i_mapping; + const struct address_space_operations *a_ops = mapping->a_ops; + int offset = off & (sb->s_blocksize - 1); + size_t towrite = len; + struct page *page; + void *fsdata = NULL; + int err = 0; + int tocopy; + + while (towrite > 0) { + tocopy = min_t(unsigned long, sb->s_blocksize - offset, + towrite); +retry: + err = a_ops->write_begin(NULL, mapping, off, tocopy, + &page, &fsdata); + if (unlikely(err)) { + if (err == -ENOMEM) { + f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT); + goto retry; + } + set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR); + break; + } + + memcpy_to_page(page, offset, data, tocopy); + + a_ops->write_end(NULL, mapping, off, tocopy, tocopy, + page, fsdata); + offset = 0; + towrite -= tocopy; + off += tocopy; + data += tocopy; + cond_resched(); + } + + if (len == towrite) + return err; + inode->i_mtime = inode->i_ctime = current_time(inode); + f2fs_mark_inode_dirty_sync(inode, false); + return len - towrite; +} + +int f2fs_dquot_initialize(struct inode *inode) +{ + if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) { + f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT); + return -ESRCH; + } + + return dquot_initialize(inode); +} + +static struct dquot **f2fs_get_dquots(struct inode *inode) +{ + return F2FS_I(inode)->i_dquot; +} + +static qsize_t *f2fs_get_reserved_space(struct inode *inode) +{ + return &F2FS_I(inode)->i_reserved_quota; +} + +static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type) +{ + if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) { + f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it"); + return 0; + } + + return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type], + F2FS_OPTION(sbi).s_jquota_fmt, type); +} + +int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly) +{ + int enabled = 0; + int i, err; + + if (f2fs_sb_has_quota_ino(sbi) && rdonly) { + err = f2fs_enable_quotas(sbi->sb); + if (err) { + f2fs_err(sbi, "Cannot turn on quota_ino: %d", err); + return 0; + } + return 1; + } + + for (i = 0; i < MAXQUOTAS; i++) { + if (F2FS_OPTION(sbi).s_qf_names[i]) { + err = f2fs_quota_on_mount(sbi, i); + if (!err) { + enabled = 1; + continue; + } + f2fs_err(sbi, "Cannot turn on quotas: %d on %d", + err, i); + } + } + return enabled; +} + +static int f2fs_quota_enable(struct super_block *sb, int type, int format_id, + unsigned int flags) +{ + struct inode *qf_inode; + unsigned long qf_inum; + int err; + + BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb))); + + qf_inum = f2fs_qf_ino(sb, type); + if (!qf_inum) + return -EPERM; + + qf_inode = f2fs_iget(sb, qf_inum); + if (IS_ERR(qf_inode)) { + f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum); + return PTR_ERR(qf_inode); + } + + /* Don't account quota for quota files to avoid recursion */ + qf_inode->i_flags |= S_NOQUOTA; + err = dquot_load_quota_inode(qf_inode, type, format_id, flags); + iput(qf_inode); + return err; +} + +static int f2fs_enable_quotas(struct super_block *sb) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + int type, err = 0; + unsigned long qf_inum; + bool quota_mopt[MAXQUOTAS] = { + test_opt(sbi, USRQUOTA), + test_opt(sbi, GRPQUOTA), + test_opt(sbi, PRJQUOTA), + }; + + if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) { + f2fs_err(sbi, "quota file may be corrupted, skip loading it"); + return 0; + } + + sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; + + for (type = 0; type < MAXQUOTAS; type++) { + qf_inum = f2fs_qf_ino(sb, type); + if (qf_inum) { + err = f2fs_quota_enable(sb, type, QFMT_VFS_V1, + DQUOT_USAGE_ENABLED | + (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); + if (err) { + f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.", + type, err); + for (type--; type >= 0; type--) + dquot_quota_off(sb, type); + set_sbi_flag(F2FS_SB(sb), + SBI_QUOTA_NEED_REPAIR); + return err; + } + } + } + return 0; +} + +static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type) +{ + struct quota_info *dqopt = sb_dqopt(sbi->sb); + struct address_space *mapping = dqopt->files[type]->i_mapping; + int ret = 0; + + ret = dquot_writeback_dquots(sbi->sb, type); + if (ret) + goto out; + + ret = filemap_fdatawrite(mapping); + if (ret) + goto out; + + /* if we are using journalled quota */ + if (is_journalled_quota(sbi)) + goto out; + + ret = filemap_fdatawait(mapping); + + truncate_inode_pages(&dqopt->files[type]->i_data, 0); +out: + if (ret) + set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR); + return ret; +} + +int f2fs_quota_sync(struct super_block *sb, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct quota_info *dqopt = sb_dqopt(sb); + int cnt; + int ret = 0; + + /* + * Now when everything is written we can discard the pagecache so + * that userspace sees the changes. + */ + for (cnt = 0; cnt < MAXQUOTAS; cnt++) { + + if (type != -1 && cnt != type) + continue; + + if (!sb_has_quota_active(sb, cnt)) + continue; + + if (!f2fs_sb_has_quota_ino(sbi)) + inode_lock(dqopt->files[cnt]); + + /* + * do_quotactl + * f2fs_quota_sync + * f2fs_down_read(quota_sem) + * dquot_writeback_dquots() + * f2fs_dquot_commit + * block_operation + * f2fs_down_read(quota_sem) + */ + f2fs_lock_op(sbi); + f2fs_down_read(&sbi->quota_sem); + + ret = f2fs_quota_sync_file(sbi, cnt); + + f2fs_up_read(&sbi->quota_sem); + f2fs_unlock_op(sbi); + + if (!f2fs_sb_has_quota_ino(sbi)) + inode_unlock(dqopt->files[cnt]); + + if (ret) + break; + } + return ret; +} + +static int f2fs_quota_on(struct super_block *sb, int type, int format_id, + const struct path *path) +{ + struct inode *inode; + int err; + + /* if quota sysfile exists, deny enabling quota with specific file */ + if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) { + f2fs_err(F2FS_SB(sb), "quota sysfile already exists"); + return -EBUSY; + } + + err = f2fs_quota_sync(sb, type); + if (err) + return err; + + err = dquot_quota_on(sb, type, format_id, path); + if (err) + return err; + + inode = d_inode(path->dentry); + + inode_lock(inode); + F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL; + f2fs_set_inode_flags(inode); + inode_unlock(inode); + f2fs_mark_inode_dirty_sync(inode, false); + + return 0; +} + +static int __f2fs_quota_off(struct super_block *sb, int type) +{ + struct inode *inode = sb_dqopt(sb)->files[type]; + int err; + + if (!inode || !igrab(inode)) + return dquot_quota_off(sb, type); + + err = f2fs_quota_sync(sb, type); + if (err) + goto out_put; + + err = dquot_quota_off(sb, type); + if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb))) + goto out_put; + + inode_lock(inode); + F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL); + f2fs_set_inode_flags(inode); + inode_unlock(inode); + f2fs_mark_inode_dirty_sync(inode, false); +out_put: + iput(inode); + return err; +} + +static int f2fs_quota_off(struct super_block *sb, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + int err; + + err = __f2fs_quota_off(sb, type); + + /* + * quotactl can shutdown journalled quota, result in inconsistence + * between quota record and fs data by following updates, tag the + * flag to let fsck be aware of it. + */ + if (is_journalled_quota(sbi)) + set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR); + return err; +} + +void f2fs_quota_off_umount(struct super_block *sb) +{ + int type; + int err; + + for (type = 0; type < MAXQUOTAS; type++) { + err = __f2fs_quota_off(sb, type); + if (err) { + int ret = dquot_quota_off(sb, type); + + f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.", + type, err, ret); + set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR); + } + } + /* + * In case of checkpoint=disable, we must flush quota blocks. + * This can cause NULL exception for node_inode in end_io, since + * put_super already dropped it. + */ + sync_filesystem(sb); +} + +static void f2fs_truncate_quota_inode_pages(struct super_block *sb) +{ + struct quota_info *dqopt = sb_dqopt(sb); + int type; + + for (type = 0; type < MAXQUOTAS; type++) { + if (!dqopt->files[type]) + continue; + f2fs_inode_synced(dqopt->files[type]); + } +} + +static int f2fs_dquot_commit(struct dquot *dquot) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb); + int ret; + + f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING); + ret = dquot_commit(dquot); + if (ret < 0) + set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR); + f2fs_up_read(&sbi->quota_sem); + return ret; +} + +static int f2fs_dquot_acquire(struct dquot *dquot) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb); + int ret; + + f2fs_down_read(&sbi->quota_sem); + ret = dquot_acquire(dquot); + if (ret < 0) + set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR); + f2fs_up_read(&sbi->quota_sem); + return ret; +} + +static int f2fs_dquot_release(struct dquot *dquot) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb); + int ret = dquot_release(dquot); + + if (ret < 0) + set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR); + return ret; +} + +static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot) +{ + struct super_block *sb = dquot->dq_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + int ret = dquot_mark_dquot_dirty(dquot); + + /* if we are using journalled quota */ + if (is_journalled_quota(sbi)) + set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH); + + return ret; +} + +static int f2fs_dquot_commit_info(struct super_block *sb, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + int ret = dquot_commit_info(sb, type); + + if (ret < 0) + set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR); + return ret; +} + +static int f2fs_get_projid(struct inode *inode, kprojid_t *projid) +{ + *projid = F2FS_I(inode)->i_projid; + return 0; +} + +static const struct dquot_operations f2fs_quota_operations = { + .get_reserved_space = f2fs_get_reserved_space, + .write_dquot = f2fs_dquot_commit, + .acquire_dquot = f2fs_dquot_acquire, + .release_dquot = f2fs_dquot_release, + .mark_dirty = f2fs_dquot_mark_dquot_dirty, + .write_info = f2fs_dquot_commit_info, + .alloc_dquot = dquot_alloc, + .destroy_dquot = dquot_destroy, + .get_projid = f2fs_get_projid, + .get_next_id = dquot_get_next_id, +}; + +static const struct quotactl_ops f2fs_quotactl_ops = { + .quota_on = f2fs_quota_on, + .quota_off = f2fs_quota_off, + .quota_sync = f2fs_quota_sync, + .get_state = dquot_get_state, + .set_info = dquot_set_dqinfo, + .get_dqblk = dquot_get_dqblk, + .set_dqblk = dquot_set_dqblk, + .get_nextdqblk = dquot_get_next_dqblk, +}; +#else +int f2fs_dquot_initialize(struct inode *inode) +{ + return 0; +} + +int f2fs_quota_sync(struct super_block *sb, int type) +{ + return 0; +} + +void f2fs_quota_off_umount(struct super_block *sb) +{ +} +#endif + +static const struct super_operations f2fs_sops = { + .alloc_inode = f2fs_alloc_inode, + .free_inode = f2fs_free_inode, + .drop_inode = f2fs_drop_inode, + .write_inode = f2fs_write_inode, + .dirty_inode = f2fs_dirty_inode, + .show_options = f2fs_show_options, +#ifdef CONFIG_QUOTA + .quota_read = f2fs_quota_read, + .quota_write = f2fs_quota_write, + .get_dquots = f2fs_get_dquots, +#endif + .evict_inode = f2fs_evict_inode, + .put_super = f2fs_put_super, + .sync_fs = f2fs_sync_fs, + .freeze_fs = f2fs_freeze, + .unfreeze_fs = f2fs_unfreeze, + .statfs = f2fs_statfs, + .remount_fs = f2fs_remount, +}; + +#ifdef CONFIG_FS_ENCRYPTION +static int f2fs_get_context(struct inode *inode, void *ctx, size_t len) +{ + return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION, + F2FS_XATTR_NAME_ENCRYPTION_CONTEXT, + ctx, len, NULL); +} + +static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len, + void *fs_data) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + + /* + * Encrypting the root directory is not allowed because fsck + * expects lost+found directory to exist and remain unencrypted + * if LOST_FOUND feature is enabled. + * + */ + if (f2fs_sb_has_lost_found(sbi) && + inode->i_ino == F2FS_ROOT_INO(sbi)) + return -EPERM; + + return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION, + F2FS_XATTR_NAME_ENCRYPTION_CONTEXT, + ctx, len, fs_data, XATTR_CREATE); +} + +static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb) +{ + return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy; +} + +static bool f2fs_has_stable_inodes(struct super_block *sb) +{ + return true; +} + +static void f2fs_get_ino_and_lblk_bits(struct super_block *sb, + int *ino_bits_ret, int *lblk_bits_ret) +{ + *ino_bits_ret = 8 * sizeof(nid_t); + *lblk_bits_ret = 8 * sizeof(block_t); +} + +static struct block_device **f2fs_get_devices(struct super_block *sb, + unsigned int *num_devs) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct block_device **devs; + int i; + + if (!f2fs_is_multi_device(sbi)) + return NULL; + + devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL); + if (!devs) + return ERR_PTR(-ENOMEM); + + for (i = 0; i < sbi->s_ndevs; i++) + devs[i] = FDEV(i).bdev; + *num_devs = sbi->s_ndevs; + return devs; +} + +static const struct fscrypt_operations f2fs_cryptops = { + .key_prefix = "f2fs:", + .get_context = f2fs_get_context, + .set_context = f2fs_set_context, + .get_dummy_policy = f2fs_get_dummy_policy, + .empty_dir = f2fs_empty_dir, + .has_stable_inodes = f2fs_has_stable_inodes, + .get_ino_and_lblk_bits = f2fs_get_ino_and_lblk_bits, + .get_devices = f2fs_get_devices, +}; +#endif + +static struct inode *f2fs_nfs_get_inode(struct super_block *sb, + u64 ino, u32 generation) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode; + + if (f2fs_check_nid_range(sbi, ino)) + return ERR_PTR(-ESTALE); + + /* + * f2fs_iget isn't quite right if the inode is currently unallocated! + * However f2fs_iget currently does appropriate checks to handle stale + * inodes so everything is OK. + */ + inode = f2fs_iget(sb, ino); + if (IS_ERR(inode)) + return ERR_CAST(inode); + if (unlikely(generation && inode->i_generation != generation)) { + /* we didn't find the right inode.. */ + iput(inode); + return ERR_PTR(-ESTALE); + } + return inode; +} + +static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_dentry(sb, fid, fh_len, fh_type, + f2fs_nfs_get_inode); +} + +static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_parent(sb, fid, fh_len, fh_type, + f2fs_nfs_get_inode); +} + +static const struct export_operations f2fs_export_ops = { + .fh_to_dentry = f2fs_fh_to_dentry, + .fh_to_parent = f2fs_fh_to_parent, + .get_parent = f2fs_get_parent, +}; + +loff_t max_file_blocks(struct inode *inode) +{ + loff_t result = 0; + loff_t leaf_count; + + /* + * note: previously, result is equal to (DEF_ADDRS_PER_INODE - + * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more + * space in inode.i_addr, it will be more safe to reassign + * result as zero. + */ + + if (inode && f2fs_compressed_file(inode)) + leaf_count = ADDRS_PER_BLOCK(inode); + else + leaf_count = DEF_ADDRS_PER_BLOCK; + + /* two direct node blocks */ + result += (leaf_count * 2); + + /* two indirect node blocks */ + leaf_count *= NIDS_PER_BLOCK; + result += (leaf_count * 2); + + /* one double indirect node block */ + leaf_count *= NIDS_PER_BLOCK; + result += leaf_count; + + return result; +} + +static int __f2fs_commit_super(struct buffer_head *bh, + struct f2fs_super_block *super) +{ + lock_buffer(bh); + if (super) + memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super)); + set_buffer_dirty(bh); + unlock_buffer(bh); + + /* it's rare case, we can do fua all the time */ + return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA); +} + +static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi, + struct buffer_head *bh) +{ + struct f2fs_super_block *raw_super = (struct f2fs_super_block *) + (bh->b_data + F2FS_SUPER_OFFSET); + struct super_block *sb = sbi->sb; + u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr); + u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr); + u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr); + u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr); + u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); + u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr); + u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt); + u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit); + u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat); + u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa); + u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main); + u32 segment_count = le32_to_cpu(raw_super->segment_count); + u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); + u64 main_end_blkaddr = main_blkaddr + + (segment_count_main << log_blocks_per_seg); + u64 seg_end_blkaddr = segment0_blkaddr + + (segment_count << log_blocks_per_seg); + + if (segment0_blkaddr != cp_blkaddr) { + f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)", + segment0_blkaddr, cp_blkaddr); + return true; + } + + if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) != + sit_blkaddr) { + f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)", + cp_blkaddr, sit_blkaddr, + segment_count_ckpt << log_blocks_per_seg); + return true; + } + + if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) != + nat_blkaddr) { + f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)", + sit_blkaddr, nat_blkaddr, + segment_count_sit << log_blocks_per_seg); + return true; + } + + if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) != + ssa_blkaddr) { + f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)", + nat_blkaddr, ssa_blkaddr, + segment_count_nat << log_blocks_per_seg); + return true; + } + + if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) != + main_blkaddr) { + f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)", + ssa_blkaddr, main_blkaddr, + segment_count_ssa << log_blocks_per_seg); + return true; + } + + if (main_end_blkaddr > seg_end_blkaddr) { + f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)", + main_blkaddr, seg_end_blkaddr, + segment_count_main << log_blocks_per_seg); + return true; + } else if (main_end_blkaddr < seg_end_blkaddr) { + int err = 0; + char *res; + + /* fix in-memory information all the time */ + raw_super->segment_count = cpu_to_le32((main_end_blkaddr - + segment0_blkaddr) >> log_blocks_per_seg); + + if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) { + set_sbi_flag(sbi, SBI_NEED_SB_WRITE); + res = "internally"; + } else { + err = __f2fs_commit_super(bh, NULL); + res = err ? "failed" : "done"; + } + f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)", + res, main_blkaddr, seg_end_blkaddr, + segment_count_main << log_blocks_per_seg); + if (err) + return true; + } + return false; +} + +static int sanity_check_raw_super(struct f2fs_sb_info *sbi, + struct buffer_head *bh) +{ + block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main; + block_t total_sections, blocks_per_seg; + struct f2fs_super_block *raw_super = (struct f2fs_super_block *) + (bh->b_data + F2FS_SUPER_OFFSET); + size_t crc_offset = 0; + __u32 crc = 0; + + if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) { + f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)", + F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); + return -EINVAL; + } + + /* Check checksum_offset and crc in superblock */ + if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) { + crc_offset = le32_to_cpu(raw_super->checksum_offset); + if (crc_offset != + offsetof(struct f2fs_super_block, crc)) { + f2fs_info(sbi, "Invalid SB checksum offset: %zu", + crc_offset); + return -EFSCORRUPTED; + } + crc = le32_to_cpu(raw_super->crc); + if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) { + f2fs_info(sbi, "Invalid SB checksum value: %u", crc); + return -EFSCORRUPTED; + } + } + + /* Currently, support only 4KB block size */ + if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) { + f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u", + le32_to_cpu(raw_super->log_blocksize), + F2FS_BLKSIZE_BITS); + return -EFSCORRUPTED; + } + + /* check log blocks per segment */ + if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) { + f2fs_info(sbi, "Invalid log blocks per segment (%u)", + le32_to_cpu(raw_super->log_blocks_per_seg)); + return -EFSCORRUPTED; + } + + /* Currently, support 512/1024/2048/4096 bytes sector size */ + if (le32_to_cpu(raw_super->log_sectorsize) > + F2FS_MAX_LOG_SECTOR_SIZE || + le32_to_cpu(raw_super->log_sectorsize) < + F2FS_MIN_LOG_SECTOR_SIZE) { + f2fs_info(sbi, "Invalid log sectorsize (%u)", + le32_to_cpu(raw_super->log_sectorsize)); + return -EFSCORRUPTED; + } + if (le32_to_cpu(raw_super->log_sectors_per_block) + + le32_to_cpu(raw_super->log_sectorsize) != + F2FS_MAX_LOG_SECTOR_SIZE) { + f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)", + le32_to_cpu(raw_super->log_sectors_per_block), + le32_to_cpu(raw_super->log_sectorsize)); + return -EFSCORRUPTED; + } + + segment_count = le32_to_cpu(raw_super->segment_count); + segment_count_main = le32_to_cpu(raw_super->segment_count_main); + segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); + secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); + total_sections = le32_to_cpu(raw_super->section_count); + + /* blocks_per_seg should be 512, given the above check */ + blocks_per_seg = BIT(le32_to_cpu(raw_super->log_blocks_per_seg)); + + if (segment_count > F2FS_MAX_SEGMENT || + segment_count < F2FS_MIN_SEGMENTS) { + f2fs_info(sbi, "Invalid segment count (%u)", segment_count); + return -EFSCORRUPTED; + } + + if (total_sections > segment_count_main || total_sections < 1 || + segs_per_sec > segment_count || !segs_per_sec) { + f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)", + segment_count, total_sections, segs_per_sec); + return -EFSCORRUPTED; + } + + if (segment_count_main != total_sections * segs_per_sec) { + f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)", + segment_count_main, total_sections, segs_per_sec); + return -EFSCORRUPTED; + } + + if ((segment_count / segs_per_sec) < total_sections) { + f2fs_info(sbi, "Small segment_count (%u < %u * %u)", + segment_count, segs_per_sec, total_sections); + return -EFSCORRUPTED; + } + + if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) { + f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)", + segment_count, le64_to_cpu(raw_super->block_count)); + return -EFSCORRUPTED; + } + + if (RDEV(0).path[0]) { + block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments); + int i = 1; + + while (i < MAX_DEVICES && RDEV(i).path[0]) { + dev_seg_count += le32_to_cpu(RDEV(i).total_segments); + i++; + } + if (segment_count != dev_seg_count) { + f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)", + segment_count, dev_seg_count); + return -EFSCORRUPTED; + } + } else { + if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) && + !bdev_is_zoned(sbi->sb->s_bdev)) { + f2fs_info(sbi, "Zoned block device path is missing"); + return -EFSCORRUPTED; + } + } + + if (secs_per_zone > total_sections || !secs_per_zone) { + f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)", + secs_per_zone, total_sections); + return -EFSCORRUPTED; + } + if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION || + raw_super->hot_ext_count > F2FS_MAX_EXTENSION || + (le32_to_cpu(raw_super->extension_count) + + raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) { + f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)", + le32_to_cpu(raw_super->extension_count), + raw_super->hot_ext_count, + F2FS_MAX_EXTENSION); + return -EFSCORRUPTED; + } + + if (le32_to_cpu(raw_super->cp_payload) >= + (blocks_per_seg - F2FS_CP_PACKS - + NR_CURSEG_PERSIST_TYPE)) { + f2fs_info(sbi, "Insane cp_payload (%u >= %u)", + le32_to_cpu(raw_super->cp_payload), + blocks_per_seg - F2FS_CP_PACKS - + NR_CURSEG_PERSIST_TYPE); + return -EFSCORRUPTED; + } + + /* check reserved ino info */ + if (le32_to_cpu(raw_super->node_ino) != 1 || + le32_to_cpu(raw_super->meta_ino) != 2 || + le32_to_cpu(raw_super->root_ino) != 3) { + f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)", + le32_to_cpu(raw_super->node_ino), + le32_to_cpu(raw_super->meta_ino), + le32_to_cpu(raw_super->root_ino)); + return -EFSCORRUPTED; + } + + /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */ + if (sanity_check_area_boundary(sbi, bh)) + return -EFSCORRUPTED; + + return 0; +} + +int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi) +{ + unsigned int total, fsmeta; + struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + unsigned int ovp_segments, reserved_segments; + unsigned int main_segs, blocks_per_seg; + unsigned int sit_segs, nat_segs; + unsigned int sit_bitmap_size, nat_bitmap_size; + unsigned int log_blocks_per_seg; + unsigned int segment_count_main; + unsigned int cp_pack_start_sum, cp_payload; + block_t user_block_count, valid_user_blocks; + block_t avail_node_count, valid_node_count; + unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks; + int i, j; + + total = le32_to_cpu(raw_super->segment_count); + fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); + sit_segs = le32_to_cpu(raw_super->segment_count_sit); + fsmeta += sit_segs; + nat_segs = le32_to_cpu(raw_super->segment_count_nat); + fsmeta += nat_segs; + fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); + fsmeta += le32_to_cpu(raw_super->segment_count_ssa); + + if (unlikely(fsmeta >= total)) + return 1; + + ovp_segments = le32_to_cpu(ckpt->overprov_segment_count); + reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count); + + if (!f2fs_sb_has_readonly(sbi) && + unlikely(fsmeta < F2FS_MIN_META_SEGMENTS || + ovp_segments == 0 || reserved_segments == 0)) { + f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version"); + return 1; + } + user_block_count = le64_to_cpu(ckpt->user_block_count); + segment_count_main = le32_to_cpu(raw_super->segment_count_main) + + (f2fs_sb_has_readonly(sbi) ? 1 : 0); + log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); + if (!user_block_count || user_block_count >= + segment_count_main << log_blocks_per_seg) { + f2fs_err(sbi, "Wrong user_block_count: %u", + user_block_count); + return 1; + } + + valid_user_blocks = le64_to_cpu(ckpt->valid_block_count); + if (valid_user_blocks > user_block_count) { + f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u", + valid_user_blocks, user_block_count); + return 1; + } + + valid_node_count = le32_to_cpu(ckpt->valid_node_count); + avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; + if (valid_node_count > avail_node_count) { + f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u", + valid_node_count, avail_node_count); + return 1; + } + + main_segs = le32_to_cpu(raw_super->segment_count_main); + blocks_per_seg = sbi->blocks_per_seg; + + for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) { + if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs || + le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg) + return 1; + + if (f2fs_sb_has_readonly(sbi)) + goto check_data; + + for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) { + if (le32_to_cpu(ckpt->cur_node_segno[i]) == + le32_to_cpu(ckpt->cur_node_segno[j])) { + f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u", + i, j, + le32_to_cpu(ckpt->cur_node_segno[i])); + return 1; + } + } + } +check_data: + for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) { + if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs || + le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg) + return 1; + + if (f2fs_sb_has_readonly(sbi)) + goto skip_cross; + + for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) { + if (le32_to_cpu(ckpt->cur_data_segno[i]) == + le32_to_cpu(ckpt->cur_data_segno[j])) { + f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u", + i, j, + le32_to_cpu(ckpt->cur_data_segno[i])); + return 1; + } + } + } + for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) { + for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) { + if (le32_to_cpu(ckpt->cur_node_segno[i]) == + le32_to_cpu(ckpt->cur_data_segno[j])) { + f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u", + i, j, + le32_to_cpu(ckpt->cur_node_segno[i])); + return 1; + } + } + } +skip_cross: + sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); + nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); + + if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 || + nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) { + f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u", + sit_bitmap_size, nat_bitmap_size); + return 1; + } + + cp_pack_start_sum = __start_sum_addr(sbi); + cp_payload = __cp_payload(sbi); + if (cp_pack_start_sum < cp_payload + 1 || + cp_pack_start_sum > blocks_per_seg - 1 - + NR_CURSEG_PERSIST_TYPE) { + f2fs_err(sbi, "Wrong cp_pack_start_sum: %u", + cp_pack_start_sum); + return 1; + } + + if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) && + le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) { + f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, " + "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, " + "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"", + le32_to_cpu(ckpt->checksum_offset)); + return 1; + } + + nat_blocks = nat_segs << log_blocks_per_seg; + nat_bits_bytes = nat_blocks / BITS_PER_BYTE; + nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8); + if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) && + (cp_payload + F2FS_CP_PACKS + + NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) { + f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)", + cp_payload, nat_bits_blocks); + return 1; + } + + if (unlikely(f2fs_cp_error(sbi))) { + f2fs_err(sbi, "A bug case: need to run fsck"); + return 1; + } + return 0; +} + +static void init_sb_info(struct f2fs_sb_info *sbi) +{ + struct f2fs_super_block *raw_super = sbi->raw_super; + int i; + + sbi->log_sectors_per_block = + le32_to_cpu(raw_super->log_sectors_per_block); + sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); + sbi->blocksize = BIT(sbi->log_blocksize); + sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); + sbi->blocks_per_seg = BIT(sbi->log_blocks_per_seg); + sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); + sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); + sbi->total_sections = le32_to_cpu(raw_super->section_count); + sbi->total_node_count = + (le32_to_cpu(raw_super->segment_count_nat) / 2) + * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; + F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino); + F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino); + F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino); + sbi->cur_victim_sec = NULL_SECNO; + sbi->gc_mode = GC_NORMAL; + sbi->next_victim_seg[BG_GC] = NULL_SEGNO; + sbi->next_victim_seg[FG_GC] = NULL_SEGNO; + sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; + sbi->migration_granularity = sbi->segs_per_sec; + sbi->seq_file_ra_mul = MIN_RA_MUL; + sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE; + sbi->max_fragment_hole = DEF_FRAGMENT_SIZE; + spin_lock_init(&sbi->gc_urgent_high_lock); + atomic64_set(&sbi->current_atomic_write, 0); + + sbi->dir_level = DEF_DIR_LEVEL; + sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL; + sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL; + sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL; + sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL; + sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL; + sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] = + DEF_UMOUNT_DISCARD_TIMEOUT; + clear_sbi_flag(sbi, SBI_NEED_FSCK); + + for (i = 0; i < NR_COUNT_TYPE; i++) + atomic_set(&sbi->nr_pages[i], 0); + + for (i = 0; i < META; i++) + atomic_set(&sbi->wb_sync_req[i], 0); + + INIT_LIST_HEAD(&sbi->s_list); + mutex_init(&sbi->umount_mutex); + init_f2fs_rwsem(&sbi->io_order_lock); + spin_lock_init(&sbi->cp_lock); + + sbi->dirty_device = 0; + spin_lock_init(&sbi->dev_lock); + + init_f2fs_rwsem(&sbi->sb_lock); + init_f2fs_rwsem(&sbi->pin_sem); +} + +static int init_percpu_info(struct f2fs_sb_info *sbi) +{ + int err; + + err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL); + if (err) + return err; + + err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL); + if (err) + goto err_valid_block; + + err = percpu_counter_init(&sbi->total_valid_inode_count, 0, + GFP_KERNEL); + if (err) + goto err_node_block; + return 0; + +err_node_block: + percpu_counter_destroy(&sbi->rf_node_block_count); +err_valid_block: + percpu_counter_destroy(&sbi->alloc_valid_block_count); + return err; +} + +#ifdef CONFIG_BLK_DEV_ZONED + +struct f2fs_report_zones_args { + struct f2fs_sb_info *sbi; + struct f2fs_dev_info *dev; +}; + +static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx, + void *data) +{ + struct f2fs_report_zones_args *rz_args = data; + block_t unusable_blocks = (zone->len - zone->capacity) >> + F2FS_LOG_SECTORS_PER_BLOCK; + + if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) + return 0; + + set_bit(idx, rz_args->dev->blkz_seq); + if (!rz_args->sbi->unusable_blocks_per_sec) { + rz_args->sbi->unusable_blocks_per_sec = unusable_blocks; + return 0; + } + if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) { + f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n"); + return -EINVAL; + } + return 0; +} + +static int init_blkz_info(struct f2fs_sb_info *sbi, int devi) +{ + struct block_device *bdev = FDEV(devi).bdev; + sector_t nr_sectors = bdev_nr_sectors(bdev); + struct f2fs_report_zones_args rep_zone_arg; + u64 zone_sectors; + int ret; + + if (!f2fs_sb_has_blkzoned(sbi)) + return 0; + + zone_sectors = bdev_zone_sectors(bdev); + if (!is_power_of_2(zone_sectors)) { + f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n"); + return -EINVAL; + } + + if (sbi->blocks_per_blkz && sbi->blocks_per_blkz != + SECTOR_TO_BLOCK(zone_sectors)) + return -EINVAL; + sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors); + if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz != + __ilog2_u32(sbi->blocks_per_blkz)) + return -EINVAL; + sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz); + FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >> + sbi->log_blocks_per_blkz; + if (nr_sectors & (zone_sectors - 1)) + FDEV(devi).nr_blkz++; + + FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi, + BITS_TO_LONGS(FDEV(devi).nr_blkz) + * sizeof(unsigned long), + GFP_KERNEL); + if (!FDEV(devi).blkz_seq) + return -ENOMEM; + + rep_zone_arg.sbi = sbi; + rep_zone_arg.dev = &FDEV(devi); + + ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb, + &rep_zone_arg); + if (ret < 0) + return ret; + return 0; +} +#endif + +/* + * Read f2fs raw super block. + * Because we have two copies of super block, so read both of them + * to get the first valid one. If any one of them is broken, we pass + * them recovery flag back to the caller. + */ +static int read_raw_super_block(struct f2fs_sb_info *sbi, + struct f2fs_super_block **raw_super, + int *valid_super_block, int *recovery) +{ + struct super_block *sb = sbi->sb; + int block; + struct buffer_head *bh; + struct f2fs_super_block *super; + int err = 0; + + super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL); + if (!super) + return -ENOMEM; + + for (block = 0; block < 2; block++) { + bh = sb_bread(sb, block); + if (!bh) { + f2fs_err(sbi, "Unable to read %dth superblock", + block + 1); + err = -EIO; + *recovery = 1; + continue; + } + + /* sanity checking of raw super */ + err = sanity_check_raw_super(sbi, bh); + if (err) { + f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock", + block + 1); + brelse(bh); + *recovery = 1; + continue; + } + + if (!*raw_super) { + memcpy(super, bh->b_data + F2FS_SUPER_OFFSET, + sizeof(*super)); + *valid_super_block = block; + *raw_super = super; + } + brelse(bh); + } + + /* No valid superblock */ + if (!*raw_super) + kfree(super); + else + err = 0; + + return err; +} + +int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover) +{ + struct buffer_head *bh; + __u32 crc = 0; + int err; + + if ((recover && f2fs_readonly(sbi->sb)) || + bdev_read_only(sbi->sb->s_bdev)) { + set_sbi_flag(sbi, SBI_NEED_SB_WRITE); + return -EROFS; + } + + /* we should update superblock crc here */ + if (!recover && f2fs_sb_has_sb_chksum(sbi)) { + crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi), + offsetof(struct f2fs_super_block, crc)); + F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc); + } + + /* write back-up superblock first */ + bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1); + if (!bh) + return -EIO; + err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi)); + brelse(bh); + + /* if we are in recovery path, skip writing valid superblock */ + if (recover || err) + return err; + + /* write current valid superblock */ + bh = sb_bread(sbi->sb, sbi->valid_super_block); + if (!bh) + return -EIO; + err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi)); + brelse(bh); + return err; +} + +void f2fs_handle_stop(struct f2fs_sb_info *sbi, unsigned char reason) +{ + struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); + int err; + + f2fs_down_write(&sbi->sb_lock); + + if (raw_super->s_stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0)) + raw_super->s_stop_reason[reason]++; + + err = f2fs_commit_super(sbi, false); + if (err) + f2fs_err(sbi, "f2fs_commit_super fails to record reason:%u err:%d", + reason, err); + f2fs_up_write(&sbi->sb_lock); +} + +void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag) +{ + spin_lock(&sbi->error_lock); + if (!test_bit(flag, (unsigned long *)sbi->errors)) { + set_bit(flag, (unsigned long *)sbi->errors); + sbi->error_dirty = true; + } + spin_unlock(&sbi->error_lock); +} + +static bool f2fs_update_errors(struct f2fs_sb_info *sbi) +{ + bool need_update = false; + + spin_lock(&sbi->error_lock); + if (sbi->error_dirty) { + memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors, + MAX_F2FS_ERRORS); + sbi->error_dirty = false; + need_update = true; + } + spin_unlock(&sbi->error_lock); + + return need_update; +} + +void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error) +{ + int err; + + f2fs_save_errors(sbi, error); + + f2fs_down_write(&sbi->sb_lock); + + if (!f2fs_update_errors(sbi)) + goto out_unlock; + + err = f2fs_commit_super(sbi, false); + if (err) + f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d", + error, err); +out_unlock: + f2fs_up_write(&sbi->sb_lock); +} + +static int f2fs_scan_devices(struct f2fs_sb_info *sbi) +{ + struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); + unsigned int max_devices = MAX_DEVICES; + unsigned int logical_blksize; + int i; + + /* Initialize single device information */ + if (!RDEV(0).path[0]) { + if (!bdev_is_zoned(sbi->sb->s_bdev)) + return 0; + max_devices = 1; + } + + /* + * Initialize multiple devices information, or single + * zoned block device information. + */ + sbi->devs = f2fs_kzalloc(sbi, + array_size(max_devices, + sizeof(struct f2fs_dev_info)), + GFP_KERNEL); + if (!sbi->devs) + return -ENOMEM; + + logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev); + sbi->aligned_blksize = true; + + for (i = 0; i < max_devices; i++) { + + if (i > 0 && !RDEV(i).path[0]) + break; + + if (max_devices == 1) { + /* Single zoned block device mount */ + FDEV(0).bdev = + blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev, + sbi->sb->s_mode, sbi->sb->s_type); + } else { + /* Multi-device mount */ + memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN); + FDEV(i).total_segments = + le32_to_cpu(RDEV(i).total_segments); + if (i == 0) { + FDEV(i).start_blk = 0; + FDEV(i).end_blk = FDEV(i).start_blk + + (FDEV(i).total_segments << + sbi->log_blocks_per_seg) - 1 + + le32_to_cpu(raw_super->segment0_blkaddr); + } else { + FDEV(i).start_blk = FDEV(i - 1).end_blk + 1; + FDEV(i).end_blk = FDEV(i).start_blk + + (FDEV(i).total_segments << + sbi->log_blocks_per_seg) - 1; + } + FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path, + sbi->sb->s_mode, sbi->sb->s_type); + } + if (IS_ERR(FDEV(i).bdev)) + return PTR_ERR(FDEV(i).bdev); + + /* to release errored devices */ + sbi->s_ndevs = i + 1; + + if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev)) + sbi->aligned_blksize = false; + +#ifdef CONFIG_BLK_DEV_ZONED + if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM && + !f2fs_sb_has_blkzoned(sbi)) { + f2fs_err(sbi, "Zoned block device feature not enabled"); + return -EINVAL; + } + if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) { + if (init_blkz_info(sbi, i)) { + f2fs_err(sbi, "Failed to initialize F2FS blkzone information"); + return -EINVAL; + } + if (max_devices == 1) + break; + f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)", + i, FDEV(i).path, + FDEV(i).total_segments, + FDEV(i).start_blk, FDEV(i).end_blk, + bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ? + "Host-aware" : "Host-managed"); + continue; + } +#endif + f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x", + i, FDEV(i).path, + FDEV(i).total_segments, + FDEV(i).start_blk, FDEV(i).end_blk); + } + f2fs_info(sbi, + "IO Block Size: %8ld KB", F2FS_IO_SIZE_KB(sbi)); + return 0; +} + +static int f2fs_setup_casefold(struct f2fs_sb_info *sbi) +{ +#if IS_ENABLED(CONFIG_UNICODE) + if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) { + const struct f2fs_sb_encodings *encoding_info; + struct unicode_map *encoding; + __u16 encoding_flags; + + encoding_info = f2fs_sb_read_encoding(sbi->raw_super); + if (!encoding_info) { + f2fs_err(sbi, + "Encoding requested by superblock is unknown"); + return -EINVAL; + } + + encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags); + encoding = utf8_load(encoding_info->version); + if (IS_ERR(encoding)) { + f2fs_err(sbi, + "can't mount with superblock charset: %s-%u.%u.%u " + "not supported by the kernel. flags: 0x%x.", + encoding_info->name, + unicode_major(encoding_info->version), + unicode_minor(encoding_info->version), + unicode_rev(encoding_info->version), + encoding_flags); + return PTR_ERR(encoding); + } + f2fs_info(sbi, "Using encoding defined by superblock: " + "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, + unicode_major(encoding_info->version), + unicode_minor(encoding_info->version), + unicode_rev(encoding_info->version), + encoding_flags); + + sbi->sb->s_encoding = encoding; + sbi->sb->s_encoding_flags = encoding_flags; + } +#else + if (f2fs_sb_has_casefold(sbi)) { + f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE"); + return -EINVAL; + } +#endif + return 0; +} + +static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi) +{ + struct f2fs_sm_info *sm_i = SM_I(sbi); + + /* adjust parameters according to the volume size */ + if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) { + F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE; + if (f2fs_block_unit_discard(sbi)) + sm_i->dcc_info->discard_granularity = 1; + sm_i->ipu_policy = 1 << F2FS_IPU_FORCE | + 1 << F2FS_IPU_HONOR_OPU_WRITE; + } + + sbi->readdir_ra = 1; +} + +static int f2fs_fill_super(struct super_block *sb, void *data, int silent) +{ + struct f2fs_sb_info *sbi; + struct f2fs_super_block *raw_super; + struct inode *root; + int err; + bool skip_recovery = false, need_fsck = false; + char *options = NULL; + int recovery, i, valid_super_block; + struct curseg_info *seg_i; + int retry_cnt = 1; + +try_onemore: + err = -EINVAL; + raw_super = NULL; + valid_super_block = -1; + recovery = 0; + + /* allocate memory for f2fs-specific super block info */ + sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); + if (!sbi) + return -ENOMEM; + + sbi->sb = sb; + + /* initialize locks within allocated memory */ + init_f2fs_rwsem(&sbi->gc_lock); + mutex_init(&sbi->writepages); + init_f2fs_rwsem(&sbi->cp_global_sem); + init_f2fs_rwsem(&sbi->node_write); + init_f2fs_rwsem(&sbi->node_change); + spin_lock_init(&sbi->stat_lock); + init_f2fs_rwsem(&sbi->cp_rwsem); + init_f2fs_rwsem(&sbi->quota_sem); + init_waitqueue_head(&sbi->cp_wait); + spin_lock_init(&sbi->error_lock); + + for (i = 0; i < NR_INODE_TYPE; i++) { + INIT_LIST_HEAD(&sbi->inode_list[i]); + spin_lock_init(&sbi->inode_lock[i]); + } + mutex_init(&sbi->flush_lock); + + /* Load the checksum driver */ + sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0); + if (IS_ERR(sbi->s_chksum_driver)) { + f2fs_err(sbi, "Cannot load crc32 driver."); + err = PTR_ERR(sbi->s_chksum_driver); + sbi->s_chksum_driver = NULL; + goto free_sbi; + } + + /* set a block size */ + if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { + f2fs_err(sbi, "unable to set blocksize"); + goto free_sbi; + } + + err = read_raw_super_block(sbi, &raw_super, &valid_super_block, + &recovery); + if (err) + goto free_sbi; + + sb->s_fs_info = sbi; + sbi->raw_super = raw_super; + + memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS); + + /* precompute checksum seed for metadata */ + if (f2fs_sb_has_inode_chksum(sbi)) + sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid, + sizeof(raw_super->uuid)); + + default_options(sbi); + /* parse mount options */ + options = kstrdup((const char *)data, GFP_KERNEL); + if (data && !options) { + err = -ENOMEM; + goto free_sb_buf; + } + + err = parse_options(sb, options, false); + if (err) + goto free_options; + + sb->s_maxbytes = max_file_blocks(NULL) << + le32_to_cpu(raw_super->log_blocksize); + sb->s_max_links = F2FS_LINK_MAX; + + err = f2fs_setup_casefold(sbi); + if (err) + goto free_options; + +#ifdef CONFIG_QUOTA + sb->dq_op = &f2fs_quota_operations; + sb->s_qcop = &f2fs_quotactl_ops; + sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; + + if (f2fs_sb_has_quota_ino(sbi)) { + for (i = 0; i < MAXQUOTAS; i++) { + if (f2fs_qf_ino(sbi->sb, i)) + sbi->nquota_files++; + } + } +#endif + + sb->s_op = &f2fs_sops; +#ifdef CONFIG_FS_ENCRYPTION + sb->s_cop = &f2fs_cryptops; +#endif +#ifdef CONFIG_FS_VERITY + sb->s_vop = &f2fs_verityops; +#endif + sb->s_xattr = f2fs_xattr_handlers; + sb->s_export_op = &f2fs_export_ops; + sb->s_magic = F2FS_SUPER_MAGIC; + sb->s_time_gran = 1; + sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | + (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0); + memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); + sb->s_iflags |= SB_I_CGROUPWB; + + /* init f2fs-specific super block info */ + sbi->valid_super_block = valid_super_block; + + /* disallow all the data/node/meta page writes */ + set_sbi_flag(sbi, SBI_POR_DOING); + + err = f2fs_init_write_merge_io(sbi); + if (err) + goto free_bio_info; + + init_sb_info(sbi); + + err = f2fs_init_iostat(sbi); + if (err) + goto free_bio_info; + + err = init_percpu_info(sbi); + if (err) + goto free_iostat; + + if (F2FS_IO_ALIGNED(sbi)) { + sbi->write_io_dummy = + mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0); + if (!sbi->write_io_dummy) { + err = -ENOMEM; + goto free_percpu; + } + } + + /* init per sbi slab cache */ + err = f2fs_init_xattr_caches(sbi); + if (err) + goto free_io_dummy; + err = f2fs_init_page_array_cache(sbi); + if (err) + goto free_xattr_cache; + + /* get an inode for meta space */ + sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); + if (IS_ERR(sbi->meta_inode)) { + f2fs_err(sbi, "Failed to read F2FS meta data inode"); + err = PTR_ERR(sbi->meta_inode); + goto free_page_array_cache; + } + + err = f2fs_get_valid_checkpoint(sbi); + if (err) { + f2fs_err(sbi, "Failed to get valid F2FS checkpoint"); + goto free_meta_inode; + } + + if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG)) + set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR); + if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) { + set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK); + sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL; + } + + if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG)) + set_sbi_flag(sbi, SBI_NEED_FSCK); + + /* Initialize device list */ + err = f2fs_scan_devices(sbi); + if (err) { + f2fs_err(sbi, "Failed to find devices"); + goto free_devices; + } + + err = f2fs_init_post_read_wq(sbi); + if (err) { + f2fs_err(sbi, "Failed to initialize post read workqueue"); + goto free_devices; + } + + sbi->total_valid_node_count = + le32_to_cpu(sbi->ckpt->valid_node_count); + percpu_counter_set(&sbi->total_valid_inode_count, + le32_to_cpu(sbi->ckpt->valid_inode_count)); + sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); + sbi->total_valid_block_count = + le64_to_cpu(sbi->ckpt->valid_block_count); + sbi->last_valid_block_count = sbi->total_valid_block_count; + sbi->reserved_blocks = 0; + sbi->current_reserved_blocks = 0; + limit_reserve_root(sbi); + adjust_unusable_cap_perc(sbi); + + f2fs_init_extent_cache_info(sbi); + + f2fs_init_ino_entry_info(sbi); + + f2fs_init_fsync_node_info(sbi); + + /* setup checkpoint request control and start checkpoint issue thread */ + f2fs_init_ckpt_req_control(sbi); + if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) && + test_opt(sbi, MERGE_CHECKPOINT)) { + err = f2fs_start_ckpt_thread(sbi); + if (err) { + f2fs_err(sbi, + "Failed to start F2FS issue_checkpoint_thread (%d)", + err); + goto stop_ckpt_thread; + } + } + + /* setup f2fs internal modules */ + err = f2fs_build_segment_manager(sbi); + if (err) { + f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)", + err); + goto free_sm; + } + err = f2fs_build_node_manager(sbi); + if (err) { + f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)", + err); + goto free_nm; + } + + err = adjust_reserved_segment(sbi); + if (err) + goto free_nm; + + /* For write statistics */ + sbi->sectors_written_start = f2fs_get_sectors_written(sbi); + + /* Read accumulated write IO statistics if exists */ + seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE); + if (__exist_node_summaries(sbi)) + sbi->kbytes_written = + le64_to_cpu(seg_i->journal->info.kbytes_written); + + f2fs_build_gc_manager(sbi); + + err = f2fs_build_stats(sbi); + if (err) + goto free_nm; + + /* get an inode for node space */ + sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); + if (IS_ERR(sbi->node_inode)) { + f2fs_err(sbi, "Failed to read node inode"); + err = PTR_ERR(sbi->node_inode); + goto free_stats; + } + + /* read root inode and dentry */ + root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); + if (IS_ERR(root)) { + f2fs_err(sbi, "Failed to read root inode"); + err = PTR_ERR(root); + goto free_node_inode; + } + if (!S_ISDIR(root->i_mode) || !root->i_blocks || + !root->i_size || !root->i_nlink) { + iput(root); + err = -EINVAL; + goto free_node_inode; + } + + sb->s_root = d_make_root(root); /* allocate root dentry */ + if (!sb->s_root) { + err = -ENOMEM; + goto free_node_inode; + } + + err = f2fs_init_compress_inode(sbi); + if (err) + goto free_root_inode; + + err = f2fs_register_sysfs(sbi); + if (err) + goto free_compress_inode; + +#ifdef CONFIG_QUOTA + /* Enable quota usage during mount */ + if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) { + err = f2fs_enable_quotas(sb); + if (err) + f2fs_err(sbi, "Cannot turn on quotas: error %d", err); + } +#endif + /* if there are any orphan inodes, free them */ + err = f2fs_recover_orphan_inodes(sbi); + if (err) + goto free_meta; + + if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG))) + goto reset_checkpoint; + + /* recover fsynced data */ + if (!test_opt(sbi, DISABLE_ROLL_FORWARD) && + !test_opt(sbi, NORECOVERY)) { + /* + * mount should be failed, when device has readonly mode, and + * previous checkpoint was not done by clean system shutdown. + */ + if (f2fs_hw_is_readonly(sbi)) { + if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) { + err = f2fs_recover_fsync_data(sbi, true); + if (err > 0) { + err = -EROFS; + f2fs_err(sbi, "Need to recover fsync data, but " + "write access unavailable, please try " + "mount w/ disable_roll_forward or norecovery"); + } + if (err < 0) + goto free_meta; + } + f2fs_info(sbi, "write access unavailable, skipping recovery"); + goto reset_checkpoint; + } + + if (need_fsck) + set_sbi_flag(sbi, SBI_NEED_FSCK); + + if (skip_recovery) + goto reset_checkpoint; + + err = f2fs_recover_fsync_data(sbi, false); + if (err < 0) { + if (err != -ENOMEM) + skip_recovery = true; + need_fsck = true; + f2fs_err(sbi, "Cannot recover all fsync data errno=%d", + err); + goto free_meta; + } + } else { + err = f2fs_recover_fsync_data(sbi, true); + + if (!f2fs_readonly(sb) && err > 0) { + err = -EINVAL; + f2fs_err(sbi, "Need to recover fsync data"); + goto free_meta; + } + } + + /* + * If the f2fs is not readonly and fsync data recovery succeeds, + * check zoned block devices' write pointer consistency. + */ + if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) { + err = f2fs_check_write_pointer(sbi); + if (err) + goto free_meta; + } + +reset_checkpoint: + f2fs_init_inmem_curseg(sbi); + + /* f2fs_recover_fsync_data() cleared this already */ + clear_sbi_flag(sbi, SBI_POR_DOING); + + if (test_opt(sbi, DISABLE_CHECKPOINT)) { + err = f2fs_disable_checkpoint(sbi); + if (err) + goto sync_free_meta; + } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) { + f2fs_enable_checkpoint(sbi); + } + + /* + * If filesystem is not mounted as read-only then + * do start the gc_thread. + */ + if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF || + test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) { + /* After POR, we can run background GC thread.*/ + err = f2fs_start_gc_thread(sbi); + if (err) + goto sync_free_meta; + } + kvfree(options); + + /* recover broken superblock */ + if (recovery) { + err = f2fs_commit_super(sbi, true); + f2fs_info(sbi, "Try to recover %dth superblock, ret: %d", + sbi->valid_super_block ? 1 : 2, err); + } + + f2fs_join_shrinker(sbi); + + f2fs_tuning_parameters(sbi); + + f2fs_notice(sbi, "Mounted with checkpoint version = %llx", + cur_cp_version(F2FS_CKPT(sbi))); + f2fs_update_time(sbi, CP_TIME); + f2fs_update_time(sbi, REQ_TIME); + clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK); + return 0; + +sync_free_meta: + /* safe to flush all the data */ + sync_filesystem(sbi->sb); + retry_cnt = 0; + +free_meta: +#ifdef CONFIG_QUOTA + f2fs_truncate_quota_inode_pages(sb); + if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) + f2fs_quota_off_umount(sbi->sb); +#endif + /* + * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes() + * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg() + * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which + * falls into an infinite loop in f2fs_sync_meta_pages(). + */ + truncate_inode_pages_final(META_MAPPING(sbi)); + /* evict some inodes being cached by GC */ + evict_inodes(sb); + f2fs_unregister_sysfs(sbi); +free_compress_inode: + f2fs_destroy_compress_inode(sbi); +free_root_inode: + dput(sb->s_root); + sb->s_root = NULL; +free_node_inode: + f2fs_release_ino_entry(sbi, true); + truncate_inode_pages_final(NODE_MAPPING(sbi)); + iput(sbi->node_inode); + sbi->node_inode = NULL; +free_stats: + f2fs_destroy_stats(sbi); +free_nm: + /* stop discard thread before destroying node manager */ + f2fs_stop_discard_thread(sbi); + f2fs_destroy_node_manager(sbi); +free_sm: + f2fs_destroy_segment_manager(sbi); +stop_ckpt_thread: + f2fs_stop_ckpt_thread(sbi); + f2fs_destroy_post_read_wq(sbi); +free_devices: + destroy_device_list(sbi); + kvfree(sbi->ckpt); +free_meta_inode: + make_bad_inode(sbi->meta_inode); + iput(sbi->meta_inode); + sbi->meta_inode = NULL; +free_page_array_cache: + f2fs_destroy_page_array_cache(sbi); +free_xattr_cache: + f2fs_destroy_xattr_caches(sbi); +free_io_dummy: + mempool_destroy(sbi->write_io_dummy); +free_percpu: + destroy_percpu_info(sbi); +free_iostat: + f2fs_destroy_iostat(sbi); +free_bio_info: + for (i = 0; i < NR_PAGE_TYPE; i++) + kvfree(sbi->write_io[i]); + +#if IS_ENABLED(CONFIG_UNICODE) + utf8_unload(sb->s_encoding); + sb->s_encoding = NULL; +#endif +free_options: +#ifdef CONFIG_QUOTA + for (i = 0; i < MAXQUOTAS; i++) + kfree(F2FS_OPTION(sbi).s_qf_names[i]); +#endif + fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy); + kvfree(options); +free_sb_buf: + kfree(raw_super); +free_sbi: + if (sbi->s_chksum_driver) + crypto_free_shash(sbi->s_chksum_driver); + kfree(sbi); + + /* give only one another chance */ + if (retry_cnt > 0 && skip_recovery) { + retry_cnt--; + shrink_dcache_sb(sb); + goto try_onemore; + } + return err; +} + +static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data) +{ + return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); +} + +static void kill_f2fs_super(struct super_block *sb) +{ + if (sb->s_root) { + struct f2fs_sb_info *sbi = F2FS_SB(sb); + + set_sbi_flag(sbi, SBI_IS_CLOSE); + f2fs_stop_gc_thread(sbi); + f2fs_stop_discard_thread(sbi); + +#ifdef CONFIG_F2FS_FS_COMPRESSION + /* + * latter evict_inode() can bypass checking and invalidating + * compress inode cache. + */ + if (test_opt(sbi, COMPRESS_CACHE)) + truncate_inode_pages_final(COMPRESS_MAPPING(sbi)); +#endif + + if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) || + !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) { + struct cp_control cpc = { + .reason = CP_UMOUNT, + }; + f2fs_write_checkpoint(sbi, &cpc); + } + + if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb)) + sb->s_flags &= ~SB_RDONLY; + } + kill_block_super(sb); +} + +static struct file_system_type f2fs_fs_type = { + .owner = THIS_MODULE, + .name = "f2fs", + .mount = f2fs_mount, + .kill_sb = kill_f2fs_super, + .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, +}; +MODULE_ALIAS_FS("f2fs"); + +static int __init init_inodecache(void) +{ + f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache", + sizeof(struct f2fs_inode_info), 0, + SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL); + if (!f2fs_inode_cachep) + return -ENOMEM; + return 0; +} + +static void destroy_inodecache(void) +{ + /* + * Make sure all delayed rcu free inodes are flushed before we + * destroy cache. + */ + rcu_barrier(); + kmem_cache_destroy(f2fs_inode_cachep); +} + +static int __init init_f2fs_fs(void) +{ + int err; + + if (PAGE_SIZE != F2FS_BLKSIZE) { + printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n", + PAGE_SIZE, F2FS_BLKSIZE); + return -EINVAL; + } + + err = init_inodecache(); + if (err) + goto fail; + err = f2fs_create_node_manager_caches(); + if (err) + goto free_inodecache; + err = f2fs_create_segment_manager_caches(); + if (err) + goto free_node_manager_caches; + err = f2fs_create_checkpoint_caches(); + if (err) + goto free_segment_manager_caches; + err = f2fs_create_recovery_cache(); + if (err) + goto free_checkpoint_caches; + err = f2fs_create_extent_cache(); + if (err) + goto free_recovery_cache; + err = f2fs_create_garbage_collection_cache(); + if (err) + goto free_extent_cache; + err = f2fs_init_sysfs(); + if (err) + goto free_garbage_collection_cache; + err = register_shrinker(&f2fs_shrinker_info, "f2fs-shrinker"); + if (err) + goto free_sysfs; + err = register_filesystem(&f2fs_fs_type); + if (err) + goto free_shrinker; + f2fs_create_root_stats(); + err = f2fs_init_post_read_processing(); + if (err) + goto free_root_stats; + err = f2fs_init_iostat_processing(); + if (err) + goto free_post_read; + err = f2fs_init_bio_entry_cache(); + if (err) + goto free_iostat; + err = f2fs_init_bioset(); + if (err) + goto free_bio_enrty_cache; + err = f2fs_init_compress_mempool(); + if (err) + goto free_bioset; + err = f2fs_init_compress_cache(); + if (err) + goto free_compress_mempool; + err = f2fs_create_casefold_cache(); + if (err) + goto free_compress_cache; + return 0; +free_compress_cache: + f2fs_destroy_compress_cache(); +free_compress_mempool: + f2fs_destroy_compress_mempool(); +free_bioset: + f2fs_destroy_bioset(); +free_bio_enrty_cache: + f2fs_destroy_bio_entry_cache(); +free_iostat: + f2fs_destroy_iostat_processing(); +free_post_read: + f2fs_destroy_post_read_processing(); +free_root_stats: + f2fs_destroy_root_stats(); + unregister_filesystem(&f2fs_fs_type); +free_shrinker: + unregister_shrinker(&f2fs_shrinker_info); +free_sysfs: + f2fs_exit_sysfs(); +free_garbage_collection_cache: + f2fs_destroy_garbage_collection_cache(); +free_extent_cache: + f2fs_destroy_extent_cache(); +free_recovery_cache: + f2fs_destroy_recovery_cache(); +free_checkpoint_caches: + f2fs_destroy_checkpoint_caches(); +free_segment_manager_caches: + f2fs_destroy_segment_manager_caches(); +free_node_manager_caches: + f2fs_destroy_node_manager_caches(); +free_inodecache: + destroy_inodecache(); +fail: + return err; +} + +static void __exit exit_f2fs_fs(void) +{ + f2fs_destroy_casefold_cache(); + f2fs_destroy_compress_cache(); + f2fs_destroy_compress_mempool(); + f2fs_destroy_bioset(); + f2fs_destroy_bio_entry_cache(); + f2fs_destroy_iostat_processing(); + f2fs_destroy_post_read_processing(); + f2fs_destroy_root_stats(); + unregister_filesystem(&f2fs_fs_type); + unregister_shrinker(&f2fs_shrinker_info); + f2fs_exit_sysfs(); + f2fs_destroy_garbage_collection_cache(); + f2fs_destroy_extent_cache(); + f2fs_destroy_recovery_cache(); + f2fs_destroy_checkpoint_caches(); + f2fs_destroy_segment_manager_caches(); + f2fs_destroy_node_manager_caches(); + destroy_inodecache(); +} + +module_init(init_f2fs_fs) +module_exit(exit_f2fs_fs) + +MODULE_AUTHOR("Samsung Electronics's Praesto Team"); +MODULE_DESCRIPTION("Flash Friendly File System"); +MODULE_LICENSE("GPL"); +MODULE_SOFTDEP("pre: crc32"); + |