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- /*
- * fs/f2fs/super.c
- *
- * Copyright (c) 2012 Samsung Electronics Co., Ltd.
- * http://www.samsung.com/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/fs.h>
- #include <linux/statfs.h>
- #include <linux/buffer_head.h>
- #include <linux/backing-dev.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/f2fs_fs.h>
- #include <linux/sysfs.h>
- #include "f2fs.h"
- #include "node.h"
- #include "segment.h"
- #include "xattr.h"
- #include "gc.h"
- #include "trace.h"
- #define CREATE_TRACE_POINTS
- #include <trace/events/f2fs.h>
- static struct proc_dir_entry *f2fs_proc_root;
- static struct kmem_cache *f2fs_inode_cachep;
- static struct kset *f2fs_kset;
- #ifdef CONFIG_F2FS_FAULT_INJECTION
- char *fault_name[FAULT_MAX] = {
- [FAULT_KMALLOC] = "kmalloc",
- [FAULT_PAGE_ALLOC] = "page alloc",
- [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_IO] = "IO error",
- [FAULT_CHECKPOINT] = "checkpoint error",
- };
- static void f2fs_build_fault_attr(struct f2fs_sb_info *sbi,
- unsigned int rate)
- {
- struct f2fs_fault_info *ffi = &sbi->fault_info;
- if (rate) {
- atomic_set(&ffi->inject_ops, 0);
- ffi->inject_rate = rate;
- ffi->inject_type = (1 << FAULT_MAX) - 1;
- } else {
- memset(ffi, 0, sizeof(struct f2fs_fault_info));
- }
- }
- #endif
- /* f2fs-wide shrinker description */
- static struct shrinker f2fs_shrinker_info = {
- .shrink = f2fs_shrink_scan,
- .seeks = DEFAULT_SEEKS,
- };
- enum {
- Opt_gc_background,
- Opt_disable_roll_forward,
- Opt_norecovery,
- Opt_discard,
- Opt_nodiscard,
- Opt_noheap,
- Opt_user_xattr,
- Opt_nouser_xattr,
- Opt_acl,
- Opt_noacl,
- Opt_active_logs,
- Opt_disable_ext_identify,
- Opt_inline_xattr,
- 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_mode,
- Opt_fault_injection,
- 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_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_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_mode, "mode=%s"},
- {Opt_fault_injection, "fault_injection=%u"},
- {Opt_err, NULL},
- };
- /* Sysfs support for f2fs */
- enum {
- GC_THREAD, /* struct f2fs_gc_thread */
- SM_INFO, /* struct f2fs_sm_info */
- NM_INFO, /* struct f2fs_nm_info */
- F2FS_SBI, /* struct f2fs_sb_info */
- #ifdef CONFIG_F2FS_FAULT_INJECTION
- FAULT_INFO_RATE, /* struct f2fs_fault_info */
- FAULT_INFO_TYPE, /* struct f2fs_fault_info */
- #endif
- };
- struct f2fs_attr {
- struct attribute attr;
- ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
- ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
- const char *, size_t);
- int struct_type;
- int offset;
- };
- static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
- {
- if (struct_type == GC_THREAD)
- return (unsigned char *)sbi->gc_thread;
- else if (struct_type == SM_INFO)
- return (unsigned char *)SM_I(sbi);
- else if (struct_type == NM_INFO)
- return (unsigned char *)NM_I(sbi);
- else if (struct_type == F2FS_SBI)
- return (unsigned char *)sbi;
- #ifdef CONFIG_F2FS_FAULT_INJECTION
- else if (struct_type == FAULT_INFO_RATE ||
- struct_type == FAULT_INFO_TYPE)
- return (unsigned char *)&sbi->fault_info;
- #endif
- return NULL;
- }
- static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
- struct f2fs_sb_info *sbi, char *buf)
- {
- struct super_block *sb = sbi->sb;
- if (!sb->s_bdev->bd_part)
- return snprintf(buf, PAGE_SIZE, "0\n");
- return snprintf(buf, PAGE_SIZE, "%llu\n",
- (unsigned long long)(sbi->kbytes_written +
- BD_PART_WRITTEN(sbi)));
- }
- static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
- struct f2fs_sb_info *sbi, char *buf)
- {
- unsigned char *ptr = NULL;
- unsigned int *ui;
- ptr = __struct_ptr(sbi, a->struct_type);
- if (!ptr)
- return -EINVAL;
- ui = (unsigned int *)(ptr + a->offset);
- return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
- }
- static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
- struct f2fs_sb_info *sbi,
- const char *buf, size_t count)
- {
- unsigned char *ptr;
- unsigned long t;
- unsigned int *ui;
- ssize_t ret;
- ptr = __struct_ptr(sbi, a->struct_type);
- if (!ptr)
- return -EINVAL;
- ui = (unsigned int *)(ptr + a->offset);
- ret = kstrtoul(skip_spaces(buf), 0, &t);
- if (ret < 0)
- return ret;
- #ifdef CONFIG_F2FS_FAULT_INJECTION
- if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
- return -EINVAL;
- #endif
- *ui = t;
- return count;
- }
- static ssize_t f2fs_attr_show(struct kobject *kobj,
- struct attribute *attr, char *buf)
- {
- struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
- s_kobj);
- struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
- return a->show ? a->show(a, sbi, buf) : 0;
- }
- static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
- const char *buf, size_t len)
- {
- struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
- s_kobj);
- struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
- return a->store ? a->store(a, sbi, buf, len) : 0;
- }
- static void f2fs_sb_release(struct kobject *kobj)
- {
- struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
- s_kobj);
- complete(&sbi->s_kobj_unregister);
- }
- #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
- static struct f2fs_attr f2fs_attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode }, \
- .show = _show, \
- .store = _store, \
- .struct_type = _struct_type, \
- .offset = _offset \
- }
- #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
- F2FS_ATTR_OFFSET(struct_type, name, 0644, \
- f2fs_sbi_show, f2fs_sbi_store, \
- offsetof(struct struct_name, elname))
- #define F2FS_GENERAL_RO_ATTR(name) \
- static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
- F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
- F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
- F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
- F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
- F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
- F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards);
- F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
- F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
- F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
- F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
- F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
- F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
- F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
- F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
- F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
- F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
- F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
- #ifdef CONFIG_F2FS_FAULT_INJECTION
- F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
- F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
- #endif
- F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
- #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
- static struct attribute *f2fs_attrs[] = {
- ATTR_LIST(gc_min_sleep_time),
- ATTR_LIST(gc_max_sleep_time),
- ATTR_LIST(gc_no_gc_sleep_time),
- ATTR_LIST(gc_idle),
- ATTR_LIST(reclaim_segments),
- ATTR_LIST(max_small_discards),
- ATTR_LIST(batched_trim_sections),
- ATTR_LIST(ipu_policy),
- ATTR_LIST(min_ipu_util),
- ATTR_LIST(min_fsync_blocks),
- ATTR_LIST(max_victim_search),
- ATTR_LIST(dir_level),
- ATTR_LIST(ram_thresh),
- ATTR_LIST(ra_nid_pages),
- ATTR_LIST(dirty_nats_ratio),
- ATTR_LIST(cp_interval),
- ATTR_LIST(idle_interval),
- #ifdef CONFIG_F2FS_FAULT_INJECTION
- ATTR_LIST(inject_rate),
- ATTR_LIST(inject_type),
- #endif
- ATTR_LIST(lifetime_write_kbytes),
- NULL,
- };
- static const struct sysfs_ops f2fs_attr_ops = {
- .show = f2fs_attr_show,
- .store = f2fs_attr_store,
- };
- static struct kobj_type f2fs_ktype = {
- .default_attrs = f2fs_attrs,
- .sysfs_ops = &f2fs_attr_ops,
- .release = f2fs_sb_release,
- };
- void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
- {
- struct va_format vaf;
- va_list args;
- va_start(args, fmt);
- vaf.fmt = fmt;
- vaf.va = &args;
- printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
- va_end(args);
- }
- static void init_once(void *foo)
- {
- struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
- inode_init_once(&fi->vfs_inode);
- }
- static int parse_options(struct super_block *sb, char *options)
- {
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
- struct request_queue *q;
- substring_t args[MAX_OPT_ARGS];
- char *p, *name;
- int arg = 0;
- if (!options)
- return 0;
- 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 (strlen(name) == 2 && !strncmp(name, "on", 2)) {
- set_opt(sbi, BG_GC);
- clear_opt(sbi, FORCE_FG_GC);
- } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
- clear_opt(sbi, BG_GC);
- clear_opt(sbi, FORCE_FG_GC);
- } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
- set_opt(sbi, BG_GC);
- set_opt(sbi, FORCE_FG_GC);
- } 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, DISABLE_ROLL_FORWARD);
- if (!f2fs_readonly(sb))
- return -EINVAL;
- break;
- case Opt_discard:
- q = bdev_get_queue(sb->s_bdev);
- if (blk_queue_discard(q)) {
- set_opt(sbi, DISCARD);
- } else if (!f2fs_sb_mounted_blkzoned(sb)) {
- f2fs_msg(sb, KERN_WARNING,
- "mounting with \"discard\" option, but "
- "the device does not support discard");
- }
- break;
- case Opt_nodiscard:
- if (f2fs_sb_mounted_blkzoned(sb)) {
- f2fs_msg(sb, KERN_WARNING,
- "discard is required for zoned block devices");
- return -EINVAL;
- }
- clear_opt(sbi, DISCARD);
- break;
- case Opt_noheap:
- set_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;
- #else
- case Opt_user_xattr:
- f2fs_msg(sb, KERN_INFO,
- "user_xattr options not supported");
- break;
- case Opt_nouser_xattr:
- f2fs_msg(sb, KERN_INFO,
- "nouser_xattr options not supported");
- break;
- case Opt_inline_xattr:
- f2fs_msg(sb, KERN_INFO,
- "inline_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_msg(sb, KERN_INFO, "acl options not supported");
- break;
- case Opt_noacl:
- f2fs_msg(sb, KERN_INFO, "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_TYPE)
- return -EINVAL;
- 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, EXTENT_CACHE);
- break;
- case Opt_noextent_cache:
- clear_opt(sbi, 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_mode:
- name = match_strdup(&args[0]);
- if (!name)
- return -ENOMEM;
- if (strlen(name) == 8 &&
- !strncmp(name, "adaptive", 8)) {
- if (f2fs_sb_mounted_blkzoned(sb)) {
- f2fs_msg(sb, KERN_WARNING,
- "adaptive mode is not allowed with "
- "zoned block device feature");
- kfree(name);
- return -EINVAL;
- }
- set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
- } else if (strlen(name) == 3 &&
- !strncmp(name, "lfs", 3)) {
- set_opt_mode(sbi, F2FS_MOUNT_LFS);
- } else {
- kfree(name);
- return -EINVAL;
- }
- kfree(name);
- break;
- case Opt_fault_injection:
- if (args->from && match_int(args, &arg))
- return -EINVAL;
- #ifdef CONFIG_F2FS_FAULT_INJECTION
- f2fs_build_fault_attr(sbi, arg);
- #else
- f2fs_msg(sb, KERN_INFO,
- "FAULT_INJECTION was not selected");
- #endif
- break;
- default:
- f2fs_msg(sb, KERN_ERR,
- "Unrecognized mount option \"%s\" or missing value",
- p);
- return -EINVAL;
- }
- }
- return 0;
- }
- static struct inode *f2fs_alloc_inode(struct super_block *sb)
- {
- struct f2fs_inode_info *fi;
- fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
- if (!fi)
- return NULL;
- init_once((void *) fi);
- if (percpu_counter_init(&fi->dirty_pages, 0)) {
- kmem_cache_free(f2fs_inode_cachep, fi);
- return NULL;
- }
- /* Initialize f2fs-specific inode info */
- fi->vfs_inode.i_version = 1;
- fi->i_current_depth = 1;
- fi->i_advise = 0;
- init_rwsem(&fi->i_sem);
- INIT_LIST_HEAD(&fi->dirty_list);
- INIT_LIST_HEAD(&fi->gdirty_list);
- INIT_LIST_HEAD(&fi->inmem_pages);
- mutex_init(&fi->inmem_lock);
- init_rwsem(&fi->dio_rwsem[READ]);
- init_rwsem(&fi->dio_rwsem[WRITE]);
- /* 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)
- {
- /*
- * 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);
- /* some remained atomic pages should discarded */
- if (f2fs_is_atomic_file(inode))
- drop_inmem_pages(inode);
- /* should remain fi->extent_tree for writepage */
- f2fs_destroy_extent_node(inode);
- f2fs_i_size_write(inode, 0);
- if (F2FS_HAS_BLOCKS(inode))
- f2fs_truncate(inode);
- fscrypt_put_encryption_info(inode, NULL);
- spin_lock(&inode->i_lock);
- atomic_dec(&inode->i_count);
- }
- return 0;
- }
- return generic_drop_inode(inode);
- }
- 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_i_callback(struct rcu_head *head)
- {
- struct inode *inode = container_of(head, struct inode, i_rcu);
- kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
- }
- static void f2fs_destroy_inode(struct inode *inode)
- {
- percpu_counter_destroy(&F2FS_I(inode)->dirty_pages);
- call_rcu(&inode->i_rcu, f2fs_i_callback);
- }
- static void destroy_percpu_info(struct f2fs_sb_info *sbi)
- {
- percpu_counter_destroy(&sbi->alloc_valid_block_count);
- percpu_counter_destroy(&sbi->total_valid_inode_count);
- }
- static void f2fs_put_super(struct super_block *sb)
- {
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
- if (sbi->s_proc) {
- remove_proc_entry("segment_info", sbi->s_proc);
- remove_proc_entry("segment_bits", sbi->s_proc);
- remove_proc_entry(sb->s_id, f2fs_proc_root);
- }
- kobject_del(&sbi->s_kobj);
- stop_gc_thread(sbi);
- /* prevent remaining shrinker jobs */
- mutex_lock(&sbi->umount_mutex);
- /*
- * 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,
- };
- write_checkpoint(sbi, &cpc);
- }
- /* write_checkpoint can update stat informaion */
- f2fs_destroy_stats(sbi);
- /*
- * normally superblock is clean, so we need to release this.
- * In addition, EIO will skip do checkpoint, we need this as well.
- */
- 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_bios(sbi);
- iput(sbi->node_inode);
- iput(sbi->meta_inode);
- /* destroy f2fs internal modules */
- destroy_node_manager(sbi);
- destroy_segment_manager(sbi);
- kfree(sbi->ckpt);
- kobject_put(&sbi->s_kobj);
- wait_for_completion(&sbi->s_kobj_unregister);
- sb->s_fs_info = NULL;
- kfree(sbi->raw_super);
- destroy_percpu_info(sbi);
- kfree(sbi);
- }
- int f2fs_sync_fs(struct super_block *sb, int sync)
- {
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
- int err = 0;
- trace_f2fs_sync_fs(sb, sync);
- if (sync) {
- struct cp_control cpc;
- cpc.reason = __get_cp_reason(sbi);
- mutex_lock(&sbi->gc_mutex);
- err = write_checkpoint(sbi, &cpc);
- mutex_unlock(&sbi->gc_mutex);
- }
- f2fs_trace_ios(NULL, 1);
- 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;
- return 0;
- }
- static int f2fs_unfreeze(struct super_block *sb)
- {
- return 0;
- }
- 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, ovp_count;
- total_count = le64_to_cpu(sbi->raw_super->block_count);
- user_block_count = sbi->user_block_count;
- start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
- ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
- buf->f_type = F2FS_SUPER_MAGIC;
- buf->f_bsize = sbi->blocksize;
- buf->f_blocks = total_count - start_count;
- buf->f_bfree = user_block_count - valid_user_blocks(sbi) + ovp_count;
- buf->f_bavail = user_block_count - valid_user_blocks(sbi);
- buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
- buf->f_ffree = min(buf->f_files - valid_node_count(sbi),
- buf->f_bavail);
- buf->f_namelen = F2FS_NAME_LEN;
- buf->f_fsid.val[0] = (u32)id;
- buf->f_fsid.val[1] = (u32)(id >> 32);
- return 0;
- }
- static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
- {
- struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
- if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
- if (test_opt(sbi, FORCE_FG_GC))
- seq_printf(seq, ",background_gc=%s", "sync");
- else
- seq_printf(seq, ",background_gc=%s", "on");
- } else {
- seq_printf(seq, ",background_gc=%s", "off");
- }
- if (test_opt(sbi, DISABLE_ROLL_FORWARD))
- seq_puts(seq, ",disable_roll_forward");
- if (test_opt(sbi, DISCARD))
- seq_puts(seq, ",discard");
- if (test_opt(sbi, NOHEAP))
- seq_puts(seq, ",no_heap_alloc");
- #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");
- #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, 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 (test_opt(sbi, ADAPTIVE))
- seq_puts(seq, "adaptive");
- else if (test_opt(sbi, LFS))
- seq_puts(seq, "lfs");
- return 0;
- }
- static int segment_info_seq_show(struct seq_file *seq, void *offset)
- {
- struct super_block *sb = seq->private;
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
- unsigned int total_segs =
- le32_to_cpu(sbi->raw_super->segment_count_main);
- int i;
- seq_puts(seq, "format: segment_type|valid_blocks\n"
- "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
- for (i = 0; i < total_segs; i++) {
- struct seg_entry *se = get_seg_entry(sbi, i);
- if ((i % 10) == 0)
- seq_printf(seq, "%-10d", i);
- seq_printf(seq, "%d|%-3u", se->type,
- get_valid_blocks(sbi, i, 1));
- if ((i % 10) == 9 || i == (total_segs - 1))
- seq_putc(seq, '\n');
- else
- seq_putc(seq, ' ');
- }
- return 0;
- }
- static int segment_bits_seq_show(struct seq_file *seq, void *offset)
- {
- struct super_block *sb = seq->private;
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
- unsigned int total_segs =
- le32_to_cpu(sbi->raw_super->segment_count_main);
- int i, j;
- seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
- "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
- for (i = 0; i < total_segs; i++) {
- struct seg_entry *se = get_seg_entry(sbi, i);
- seq_printf(seq, "%-10d", i);
- seq_printf(seq, "%d|%-3u|", se->type,
- get_valid_blocks(sbi, i, 1));
- for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
- seq_printf(seq, " %.2x", se->cur_valid_map[j]);
- seq_putc(seq, '\n');
- }
- return 0;
- }
- #define F2FS_PROC_FILE_DEF(_name) \
- static int _name##_open_fs(struct inode *inode, struct file *file) \
- { \
- return single_open(file, _name##_seq_show, PDE(inode)->data); \
- } \
- \
- static const struct file_operations f2fs_seq_##_name##_fops = { \
- .owner = THIS_MODULE, \
- .open = _name##_open_fs, \
- .read = seq_read, \
- .llseek = seq_lseek, \
- .release = single_release, \
- };
- F2FS_PROC_FILE_DEF(segment_info);
- F2FS_PROC_FILE_DEF(segment_bits);
- static void default_options(struct f2fs_sb_info *sbi)
- {
- /* init some FS parameters */
- sbi->active_logs = NR_CURSEG_TYPE;
- set_opt(sbi, BG_GC);
- set_opt(sbi, INLINE_DATA);
- set_opt(sbi, INLINE_DENTRY);
- set_opt(sbi, EXTENT_CACHE);
- set_opt(sbi, FLUSH_MERGE);
- if (f2fs_sb_mounted_blkzoned(sbi->sb)) {
- set_opt_mode(sbi, F2FS_MOUNT_LFS);
- set_opt(sbi, DISCARD);
- } else {
- set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
- }
- #ifdef CONFIG_F2FS_FS_XATTR
- set_opt(sbi, XATTR_USER);
- #endif
- #ifdef CONFIG_F2FS_FS_POSIX_ACL
- set_opt(sbi, POSIX_ACL);
- #endif
- #ifdef CONFIG_F2FS_FAULT_INJECTION
- f2fs_build_fault_attr(sbi, 0);
- #endif
- }
- 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;
- int err, active_logs;
- bool need_restart_gc = false;
- bool need_stop_gc = false;
- bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
- #ifdef CONFIG_F2FS_FAULT_INJECTION
- struct f2fs_fault_info ffi = sbi->fault_info;
- #endif
- sync_filesystem(sb);
- /*
- * Save the old mount options in case we
- * need to restore them.
- */
- org_mount_opt = sbi->mount_opt;
- active_logs = sbi->active_logs;
- /* recover superblocks we couldn't write due to previous RO mount */
- if (!(*flags & MS_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
- err = f2fs_commit_super(sbi, false);
- f2fs_msg(sb, KERN_INFO,
- "Try to recover all the superblocks, ret: %d", err);
- if (!err)
- clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
- }
- sbi->mount_opt.opt = 0;
- default_options(sbi);
- /* parse mount options */
- err = parse_options(sb, data);
- 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 & MS_RDONLY))
- goto skip;
- /* disallow enable/disable extent_cache dynamically */
- if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
- err = -EINVAL;
- f2fs_msg(sbi->sb, KERN_WARNING,
- "switch extent_cache option is not allowed");
- 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 & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
- if (sbi->gc_thread) {
- stop_gc_thread(sbi);
- need_restart_gc = true;
- }
- } else if (!sbi->gc_thread) {
- err = start_gc_thread(sbi);
- if (err)
- goto restore_opts;
- need_stop_gc = true;
- }
- if (*flags & MS_RDONLY) {
- writeback_inodes_sb(sb, WB_REASON_SYNC);
- 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);
- }
- /*
- * We stop issue flush thread if FS is mounted as RO
- * or if flush_merge is not passed in mount option.
- */
- if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
- clear_opt(sbi, FLUSH_MERGE);
- destroy_flush_cmd_control(sbi, false);
- } else {
- err = create_flush_cmd_control(sbi);
- if (err)
- goto restore_gc;
- }
- skip:
- /* Update the POSIXACL Flag */
- sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
- (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
- return 0;
- restore_gc:
- if (need_restart_gc) {
- if (start_gc_thread(sbi))
- f2fs_msg(sbi->sb, KERN_WARNING,
- "background gc thread has stopped");
- } else if (need_stop_gc) {
- stop_gc_thread(sbi);
- }
- restore_opts:
- sbi->mount_opt = org_mount_opt;
- sbi->active_logs = active_logs;
- #ifdef CONFIG_F2FS_FAULT_INJECTION
- sbi->fault_info = ffi;
- #endif
- return err;
- }
- static struct super_operations f2fs_sops = {
- .alloc_inode = f2fs_alloc_inode,
- .drop_inode = f2fs_drop_inode,
- .destroy_inode = f2fs_destroy_inode,
- .write_inode = f2fs_write_inode,
- .dirty_inode = f2fs_dirty_inode,
- .show_options = f2fs_show_options,
- .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_F2FS_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_key_prefix(struct inode *inode, u8 **key)
- {
- *key = F2FS_I_SB(inode)->key_prefix;
- return F2FS_I_SB(inode)->key_prefix_size;
- }
- static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
- void *fs_data)
- {
- return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
- F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
- ctx, len, fs_data, XATTR_CREATE);
- }
- static unsigned f2fs_max_namelen(struct inode *inode)
- {
- return S_ISLNK(inode->i_mode) ?
- inode->i_sb->s_blocksize : F2FS_NAME_LEN;
- }
- static struct fscrypt_operations f2fs_cryptops = {
- .get_context = f2fs_get_context,
- .key_prefix = f2fs_key_prefix,
- .set_context = f2fs_set_context,
- .is_encrypted = f2fs_encrypted_inode,
- .empty_dir = f2fs_empty_dir,
- .max_namelen = f2fs_max_namelen,
- };
- #else
- static struct fscrypt_operations f2fs_cryptops = {
- .is_encrypted = f2fs_encrypted_inode,
- };
- #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 (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,
- };
- static loff_t max_file_blocks(void)
- {
- loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
- loff_t leaf_count = 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_uptodate(bh);
- set_buffer_dirty(bh);
- unlock_buffer(bh);
- /* it's rare case, we can do fua all the time */
- return __sync_dirty_buffer(bh, WRITE_FLUSH_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_msg(sb, KERN_INFO,
- "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_msg(sb, KERN_INFO,
- "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_msg(sb, KERN_INFO,
- "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_msg(sb, KERN_INFO,
- "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_msg(sb, KERN_INFO,
- "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_msg(sb, KERN_INFO,
- "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
- main_blkaddr,
- segment0_blkaddr +
- (segment_count << log_blocks_per_seg),
- 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_msg(sb, KERN_INFO,
- "Fix alignment : %s, start(%u) end(%u) block(%u)",
- res, main_blkaddr,
- segment0_blkaddr +
- (segment_count << log_blocks_per_seg),
- 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)
- {
- struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
- (bh->b_data + F2FS_SUPER_OFFSET);
- struct super_block *sb = sbi->sb;
- unsigned int blocksize;
- if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
- f2fs_msg(sb, KERN_INFO,
- "Magic Mismatch, valid(0x%x) - read(0x%x)",
- F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
- return 1;
- }
- /* Currently, support only 4KB page cache size */
- if (F2FS_BLKSIZE != PAGE_SIZE) {
- f2fs_msg(sb, KERN_INFO,
- "Invalid page_cache_size (%lu), supports only 4KB\n",
- PAGE_SIZE);
- return 1;
- }
- /* Currently, support only 4KB block size */
- blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
- if (blocksize != F2FS_BLKSIZE) {
- f2fs_msg(sb, KERN_INFO,
- "Invalid blocksize (%u), supports only 4KB\n",
- blocksize);
- return 1;
- }
- /* check log blocks per segment */
- if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
- f2fs_msg(sb, KERN_INFO,
- "Invalid log blocks per segment (%u)\n",
- le32_to_cpu(raw_super->log_blocks_per_seg));
- return 1;
- }
- /* check log blocks per segment */
- if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
- f2fs_msg(sb, KERN_INFO,
- "Invalid log blocks per segment (%u)\n",
- le32_to_cpu(raw_super->log_blocks_per_seg));
- return 1;
- }
- /* 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_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
- le32_to_cpu(raw_super->log_sectorsize));
- return 1;
- }
- if (le32_to_cpu(raw_super->log_sectors_per_block) +
- le32_to_cpu(raw_super->log_sectorsize) !=
- F2FS_MAX_LOG_SECTOR_SIZE) {
- f2fs_msg(sb, KERN_INFO,
- "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 1;
- }
- /* 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_msg(sb, KERN_INFO,
- "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 1;
- }
- /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
- if (sanity_check_area_boundary(sbi, bh))
- return 1;
- if (le32_to_cpu(raw_super->segment_count) > F2FS_MAX_SEGMENT) {
- f2fs_msg(sb, KERN_INFO,
- "Invalid segment count (%u)",
- le32_to_cpu(raw_super->segment_count));
- return 1;
- }
- return 0;
- }
- int 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 main_segs, blocks_per_seg;
- unsigned int cp_pack_start_sum, cp_payload;
- unsigned int ovp_segments, reserved_segments;
- int i;
- total = le32_to_cpu(raw_super->segment_count);
- fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
- fsmeta += le32_to_cpu(raw_super->segment_count_sit);
- fsmeta += le32_to_cpu(raw_super->segment_count_nat);
- 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 (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
- ovp_segments == 0 || reserved_segments == 0)) {
- f2fs_msg(sbi->sb, KERN_ERR,
- "Wrong layout: check mkfs.f2fs version");
- return 1;
- }
- main_segs = le32_to_cpu(sbi->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;
- }
- }
- 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;
- }
- }
- 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_TYPE) {
- f2fs_msg(sbi->sb, KERN_ERR,
- "Wrong cp_pack_start_sum: %u",
- cp_pack_start_sum);
- return 1;
- }
- if (unlikely(f2fs_cp_error(sbi))) {
- f2fs_msg(sbi->sb, KERN_ERR, "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 = 1 << sbi->log_blocksize;
- sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
- sbi->blocks_per_seg = 1 << 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;
- sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
- sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
- sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
- sbi->cur_victim_sec = NULL_SECNO;
- sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
- sbi->dir_level = DEF_DIR_LEVEL;
- sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
- sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
- clear_sbi_flag(sbi, SBI_NEED_FSCK);
- for (i = 0; i < NR_COUNT_TYPE; i++)
- atomic_set(&sbi->nr_pages[i], 0);
- INIT_LIST_HEAD(&sbi->s_list);
- mutex_init(&sbi->umount_mutex);
- mutex_init(&sbi->wio_mutex[NODE]);
- mutex_init(&sbi->wio_mutex[DATA]);
- spin_lock_init(&sbi->cp_lock);
- #ifdef CONFIG_F2FS_FS_ENCRYPTION
- memcpy(sbi->key_prefix, F2FS_KEY_DESC_PREFIX,
- F2FS_KEY_DESC_PREFIX_SIZE);
- sbi->key_prefix_size = F2FS_KEY_DESC_PREFIX_SIZE;
- #endif
- }
- static int init_percpu_info(struct f2fs_sb_info *sbi)
- {
- int err;
- err = percpu_counter_init(&sbi->alloc_valid_block_count, 0);
- if (err)
- return err;
- return percpu_counter_init(&sbi->total_valid_inode_count, 0);
- }
- #ifdef CONFIG_BLK_DEV_ZONED
- static int init_blkz_info(struct f2fs_sb_info *sbi)
- {
- struct block_device *bdev = sbi->sb->s_bdev;
- sector_t nr_sectors = bdev->bd_part->nr_sects;
- sector_t sector = 0;
- struct blk_zone *zones;
- unsigned int i, nr_zones;
- unsigned int n = 0;
- int err = -EIO;
- if (!f2fs_sb_mounted_blkzoned(sbi->sb))
- return 0;
- sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_size(bdev));
- sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
- sbi->nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
- sbi->log_blocks_per_blkz;
- if (nr_sectors & (bdev_zone_size(bdev) - 1))
- sbi->nr_blkz++;
- sbi->blkz_type = kmalloc(sbi->nr_blkz, GFP_KERNEL);
- if (!sbi->blkz_type)
- return -ENOMEM;
- #define F2FS_REPORT_NR_ZONES 4096
- zones = kcalloc(F2FS_REPORT_NR_ZONES, sizeof(struct blk_zone),
- GFP_KERNEL);
- if (!zones)
- return -ENOMEM;
- /* Get block zones type */
- while (zones && sector < nr_sectors) {
- nr_zones = F2FS_REPORT_NR_ZONES;
- err = blkdev_report_zones(bdev, sector,
- zones, &nr_zones,
- GFP_KERNEL);
- if (err)
- break;
- if (!nr_zones) {
- err = -EIO;
- break;
- }
- for (i = 0; i < nr_zones; i++) {
- sbi->blkz_type[n] = zones[i].type;
- sector += zones[i].len;
- n++;
- }
- }
- kfree(zones);
- return err;
- }
- #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_msg(sb, KERN_ERR, "Unable to read %dth superblock",
- block + 1);
- err = -EIO;
- continue;
- }
- /* sanity checking of raw super */
- if (sanity_check_raw_super(sbi, bh)) {
- f2fs_msg(sb, KERN_ERR,
- "Can't find valid F2FS filesystem in %dth superblock",
- block + 1);
- err = -EINVAL;
- brelse(bh);
- continue;
- }
- if (!*raw_super) {
- memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
- sizeof(*super));
- *valid_super_block = block;
- *raw_super = super;
- }
- brelse(bh);
- }
- /* Fail to read any one of the superblocks*/
- if (err < 0)
- *recovery = 1;
- /* 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;
- 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;
- }
- /* write back-up superblock first */
- bh = sb_getblk(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_getblk(sbi->sb, sbi->valid_super_block);
- if (!bh)
- return -EIO;
- err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
- brelse(bh);
- return err;
- }
- 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 retry = true, need_fsck = false;
- char *options = NULL;
- int recovery, i, valid_super_block;
- struct curseg_info *seg_i;
- 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;
- /* set a block size */
- if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
- f2fs_msg(sb, KERN_ERR, "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;
- /*
- * 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.
- */
- #ifndef CONFIG_BLK_DEV_ZONED
- if (f2fs_sb_mounted_blkzoned(sb)) {
- f2fs_msg(sb, KERN_ERR,
- "Zoned block device support is not enabled\n");
- goto free_sb_buf;
- }
- #else
- if (bdev_zoned_model(sb->s_bdev) == BLK_ZONED_HM &&
- !f2fs_sb_mounted_blkzoned(sb)) {
- f2fs_msg(sb, KERN_ERR,
- "Zoned block device feature not enabled\n");
- goto free_sb_buf;
- }
- #endif
- 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);
- if (err)
- goto free_options;
- sbi->max_file_blocks = max_file_blocks();
- sb->s_maxbytes = sbi->max_file_blocks <<
- le32_to_cpu(raw_super->log_blocksize);
- sb->s_max_links = F2FS_LINK_MAX;
- get_random_bytes(&sbi->s_next_generation, sizeof(u32));
- sb->s_op = &f2fs_sops;
- sb->s_cop = &f2fs_cryptops;
- 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 & ~MS_POSIXACL) |
- (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
- memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
- /* init f2fs-specific super block info */
- sbi->valid_super_block = valid_super_block;
- mutex_init(&sbi->gc_mutex);
- mutex_init(&sbi->cp_mutex);
- init_rwsem(&sbi->node_write);
- /* disallow all the data/node/meta page writes */
- set_sbi_flag(sbi, SBI_POR_DOING);
- spin_lock_init(&sbi->stat_lock);
- init_rwsem(&sbi->read_io.io_rwsem);
- sbi->read_io.sbi = sbi;
- sbi->read_io.bio = NULL;
- for (i = 0; i < NR_PAGE_TYPE; i++) {
- init_rwsem(&sbi->write_io[i].io_rwsem);
- sbi->write_io[i].sbi = sbi;
- sbi->write_io[i].bio = NULL;
- }
- init_rwsem(&sbi->cp_rwsem);
- init_waitqueue_head(&sbi->cp_wait);
- init_sb_info(sbi);
- err = init_percpu_info(sbi);
- if (err)
- goto free_options;
- /* get an inode for meta space */
- sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
- if (IS_ERR(sbi->meta_inode)) {
- f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
- err = PTR_ERR(sbi->meta_inode);
- goto free_options;
- }
- err = get_valid_checkpoint(sbi);
- if (err) {
- f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
- goto free_meta_inode;
- }
- 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;
- for (i = 0; i < NR_INODE_TYPE; i++) {
- INIT_LIST_HEAD(&sbi->inode_list[i]);
- spin_lock_init(&sbi->inode_lock[i]);
- }
- init_extent_cache_info(sbi);
- init_ino_entry_info(sbi);
- #ifdef CONFIG_BLK_DEV_ZONED
- err = init_blkz_info(sbi);
- if (err) {
- f2fs_msg(sb, KERN_ERR,
- "Failed to initialize F2FS blkzone information");
- goto free_blkz;
- }
- #endif
- /* setup f2fs internal modules */
- err = build_segment_manager(sbi);
- if (err) {
- f2fs_msg(sb, KERN_ERR,
- "Failed to initialize F2FS segment manager");
- goto free_sm;
- }
- err = build_node_manager(sbi);
- if (err) {
- f2fs_msg(sb, KERN_ERR,
- "Failed to initialize F2FS node manager");
- goto free_nm;
- }
- /* For write statistics */
- if (sb->s_bdev->bd_part)
- sbi->sectors_written_start =
- (u64)part_stat_read(sb->s_bdev->bd_part, sectors[1]);
- /* 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);
- build_gc_manager(sbi);
- /* get an inode for node space */
- sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
- if (IS_ERR(sbi->node_inode)) {
- f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
- err = PTR_ERR(sbi->node_inode);
- goto free_nm;
- }
- f2fs_join_shrinker(sbi);
- /* if there are nt orphan nodes free them */
- err = recover_orphan_inodes(sbi);
- if (err)
- goto free_node_inode;
- /* read root inode and dentry */
- root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
- if (IS_ERR(root)) {
- f2fs_msg(sb, KERN_ERR, "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) {
- 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_root_inode;
- }
- err = f2fs_build_stats(sbi);
- if (err)
- goto free_root_inode;
- if (f2fs_proc_root)
- sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
- if (sbi->s_proc) {
- proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
- &f2fs_seq_segment_info_fops, sb);
- proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
- &f2fs_seq_segment_bits_fops, sb);
- }
- sbi->s_kobj.kset = f2fs_kset;
- init_completion(&sbi->s_kobj_unregister);
- err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
- "%s", sb->s_id);
- if (err)
- goto free_proc;
- /* recover fsynced data */
- if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
- /*
- * mount should be failed, when device has readonly mode, and
- * previous checkpoint was not done by clean system shutdown.
- */
- if (bdev_read_only(sb->s_bdev) &&
- !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
- err = -EROFS;
- goto free_kobj;
- }
- if (need_fsck)
- set_sbi_flag(sbi, SBI_NEED_FSCK);
- if (!retry)
- goto skip_recovery;
- err = recover_fsync_data(sbi, false);
- if (err < 0) {
- need_fsck = true;
- f2fs_msg(sb, KERN_ERR,
- "Cannot recover all fsync data errno=%d", err);
- goto free_kobj;
- }
- } else {
- err = recover_fsync_data(sbi, true);
- if (!f2fs_readonly(sb) && err > 0) {
- err = -EINVAL;
- f2fs_msg(sb, KERN_ERR,
- "Need to recover fsync data");
- goto free_kobj;
- }
- }
- skip_recovery:
- /* recover_fsync_data() cleared this already */
- clear_sbi_flag(sbi, SBI_POR_DOING);
- /*
- * If filesystem is not mounted as read-only then
- * do start the gc_thread.
- */
- if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
- /* After POR, we can run background GC thread.*/
- err = start_gc_thread(sbi);
- if (err)
- goto free_kobj;
- }
- kfree(options);
- /* recover broken superblock */
- if (recovery) {
- err = f2fs_commit_super(sbi, true);
- f2fs_msg(sb, KERN_INFO,
- "Try to recover %dth superblock, ret: %d",
- sbi->valid_super_block ? 1 : 2, err);
- }
- f2fs_update_time(sbi, CP_TIME);
- f2fs_update_time(sbi, REQ_TIME);
- return 0;
- free_kobj:
- f2fs_sync_inode_meta(sbi);
- kobject_del(&sbi->s_kobj);
- kobject_put(&sbi->s_kobj);
- wait_for_completion(&sbi->s_kobj_unregister);
- free_proc:
- if (sbi->s_proc) {
- remove_proc_entry("segment_info", sbi->s_proc);
- remove_proc_entry("segment_bits", sbi->s_proc);
- remove_proc_entry(sb->s_id, f2fs_proc_root);
- }
- f2fs_destroy_stats(sbi);
- free_root_inode:
- dput(sb->s_root);
- sb->s_root = NULL;
- free_node_inode:
- truncate_inode_pages(NODE_MAPPING(sbi), 0);
- mutex_lock(&sbi->umount_mutex);
- release_ino_entry(sbi, true);
- f2fs_leave_shrinker(sbi);
- /*
- * Some dirty meta pages can be produced by recover_orphan_inodes()
- * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
- * followed by write_checkpoint() through f2fs_write_node_pages(), which
- * falls into an infinite loop in sync_meta_pages().
- */
- truncate_inode_pages(META_MAPPING(sbi), 0);
- iput(sbi->node_inode);
- mutex_unlock(&sbi->umount_mutex);
- free_nm:
- destroy_node_manager(sbi);
- free_sm:
- destroy_segment_manager(sbi);
- #ifdef CONFIG_BLK_DEV_ZONED
- free_blkz:
- kfree(sbi->blkz_type);
- #endif
- kfree(sbi->ckpt);
- free_meta_inode:
- make_bad_inode(sbi->meta_inode);
- iput(sbi->meta_inode);
- free_options:
- destroy_percpu_info(sbi);
- kfree(options);
- free_sb_buf:
- kfree(raw_super);
- free_sbi:
- kfree(sbi);
- /* give only one another chance */
- if (retry) {
- retry = false;
- 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)
- set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE);
- 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,
- };
- MODULE_ALIAS_FS("f2fs");
- static int __init init_inodecache(void)
- {
- f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache",
- sizeof(struct f2fs_inode_info));
- 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;
- f2fs_build_trace_ios();
- err = init_inodecache();
- if (err)
- goto fail;
- err = create_node_manager_caches();
- if (err)
- goto free_inodecache;
- err = create_segment_manager_caches();
- if (err)
- goto free_node_manager_caches;
- err = create_checkpoint_caches();
- if (err)
- goto free_segment_manager_caches;
- err = create_extent_cache();
- if (err)
- goto free_checkpoint_caches;
- f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
- if (!f2fs_kset) {
- err = -ENOMEM;
- goto free_extent_cache;
- }
- register_shrinker(&f2fs_shrinker_info);
- err = register_filesystem(&f2fs_fs_type);
- if (err)
- goto free_shrinker;
- err = f2fs_create_root_stats();
- if (err)
- goto free_filesystem;
- f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
- return 0;
- free_filesystem:
- unregister_filesystem(&f2fs_fs_type);
- free_shrinker:
- unregister_shrinker(&f2fs_shrinker_info);
- kset_unregister(f2fs_kset);
- free_extent_cache:
- destroy_extent_cache();
- free_checkpoint_caches:
- destroy_checkpoint_caches();
- free_segment_manager_caches:
- destroy_segment_manager_caches();
- free_node_manager_caches:
- destroy_node_manager_caches();
- free_inodecache:
- destroy_inodecache();
- fail:
- return err;
- }
- static void __exit exit_f2fs_fs(void)
- {
- remove_proc_entry("fs/f2fs", NULL);
- f2fs_destroy_root_stats();
- unregister_filesystem(&f2fs_fs_type);
- unregister_shrinker(&f2fs_shrinker_info);
- kset_unregister(f2fs_kset);
- destroy_extent_cache();
- destroy_checkpoint_caches();
- destroy_segment_manager_caches();
- destroy_node_manager_caches();
- destroy_inodecache();
- f2fs_destroy_trace_ios();
- }
- 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");
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