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-rw-r--r--fs/f2fs/super.c4807
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(&param, 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");
+