![Chao Yu](/assets/img/avatar_default.png)
This patch cleans up error path of fille_super to avoid unneeded release step. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2994 lines
74 KiB
C
2994 lines
74 KiB
C
/*
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* fs/f2fs/super.c
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/statfs.h>
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#include <linux/buffer_head.h>
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#include <linux/backing-dev.h>
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#include <linux/kthread.h>
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#include <linux/parser.h>
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#include <linux/mount.h>
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#include <linux/seq_file.h>
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#include <linux/proc_fs.h>
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#include <linux/random.h>
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#include <linux/exportfs.h>
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#include <linux/blkdev.h>
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#include <linux/quotaops.h>
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#include <linux/f2fs_fs.h>
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#include <linux/sysfs.h>
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#include <linux/quota.h>
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#include "f2fs.h"
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#include "node.h"
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#include "segment.h"
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#include "xattr.h"
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#include "gc.h"
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#include "trace.h"
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#define CREATE_TRACE_POINTS
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#include <trace/events/f2fs.h>
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static struct kmem_cache *f2fs_inode_cachep;
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#ifdef CONFIG_F2FS_FAULT_INJECTION
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char *fault_name[FAULT_MAX] = {
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[FAULT_KMALLOC] = "kmalloc",
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[FAULT_KVMALLOC] = "kvmalloc",
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[FAULT_PAGE_ALLOC] = "page alloc",
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[FAULT_PAGE_GET] = "page get",
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[FAULT_ALLOC_BIO] = "alloc bio",
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[FAULT_ALLOC_NID] = "alloc nid",
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[FAULT_ORPHAN] = "orphan",
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[FAULT_BLOCK] = "no more block",
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[FAULT_DIR_DEPTH] = "too big dir depth",
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[FAULT_EVICT_INODE] = "evict_inode fail",
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[FAULT_TRUNCATE] = "truncate fail",
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[FAULT_IO] = "IO error",
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[FAULT_CHECKPOINT] = "checkpoint error",
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};
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static void f2fs_build_fault_attr(struct f2fs_sb_info *sbi,
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unsigned int rate)
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{
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struct f2fs_fault_info *ffi = &sbi->fault_info;
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if (rate) {
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atomic_set(&ffi->inject_ops, 0);
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ffi->inject_rate = rate;
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ffi->inject_type = (1 << FAULT_MAX) - 1;
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} else {
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memset(ffi, 0, sizeof(struct f2fs_fault_info));
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}
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}
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#endif
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/* f2fs-wide shrinker description */
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static struct shrinker f2fs_shrinker_info = {
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.scan_objects = f2fs_shrink_scan,
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.count_objects = f2fs_shrink_count,
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.seeks = DEFAULT_SEEKS,
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};
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enum {
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Opt_gc_background,
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Opt_disable_roll_forward,
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Opt_norecovery,
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Opt_discard,
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Opt_nodiscard,
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Opt_noheap,
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Opt_heap,
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Opt_user_xattr,
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Opt_nouser_xattr,
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Opt_acl,
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Opt_noacl,
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Opt_active_logs,
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Opt_disable_ext_identify,
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Opt_inline_xattr,
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Opt_noinline_xattr,
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Opt_inline_xattr_size,
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Opt_inline_data,
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Opt_inline_dentry,
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Opt_noinline_dentry,
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Opt_flush_merge,
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Opt_noflush_merge,
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Opt_nobarrier,
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Opt_fastboot,
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Opt_extent_cache,
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Opt_noextent_cache,
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Opt_noinline_data,
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Opt_data_flush,
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Opt_reserve_root,
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Opt_resgid,
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Opt_resuid,
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Opt_mode,
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Opt_io_size_bits,
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Opt_fault_injection,
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Opt_lazytime,
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Opt_nolazytime,
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Opt_quota,
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Opt_noquota,
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Opt_usrquota,
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Opt_grpquota,
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Opt_prjquota,
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Opt_usrjquota,
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Opt_grpjquota,
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Opt_prjjquota,
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Opt_offusrjquota,
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Opt_offgrpjquota,
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Opt_offprjjquota,
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Opt_jqfmt_vfsold,
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Opt_jqfmt_vfsv0,
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Opt_jqfmt_vfsv1,
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Opt_err,
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};
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static match_table_t f2fs_tokens = {
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{Opt_gc_background, "background_gc=%s"},
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{Opt_disable_roll_forward, "disable_roll_forward"},
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{Opt_norecovery, "norecovery"},
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{Opt_discard, "discard"},
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{Opt_nodiscard, "nodiscard"},
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{Opt_noheap, "no_heap"},
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{Opt_heap, "heap"},
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{Opt_user_xattr, "user_xattr"},
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{Opt_nouser_xattr, "nouser_xattr"},
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{Opt_acl, "acl"},
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{Opt_noacl, "noacl"},
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{Opt_active_logs, "active_logs=%u"},
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{Opt_disable_ext_identify, "disable_ext_identify"},
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{Opt_inline_xattr, "inline_xattr"},
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{Opt_noinline_xattr, "noinline_xattr"},
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{Opt_inline_xattr_size, "inline_xattr_size=%u"},
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{Opt_inline_data, "inline_data"},
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{Opt_inline_dentry, "inline_dentry"},
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{Opt_noinline_dentry, "noinline_dentry"},
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{Opt_flush_merge, "flush_merge"},
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{Opt_noflush_merge, "noflush_merge"},
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{Opt_nobarrier, "nobarrier"},
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{Opt_fastboot, "fastboot"},
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{Opt_extent_cache, "extent_cache"},
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{Opt_noextent_cache, "noextent_cache"},
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{Opt_noinline_data, "noinline_data"},
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{Opt_data_flush, "data_flush"},
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{Opt_reserve_root, "reserve_root=%u"},
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{Opt_resgid, "resgid=%u"},
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{Opt_resuid, "resuid=%u"},
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{Opt_mode, "mode=%s"},
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{Opt_io_size_bits, "io_bits=%u"},
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{Opt_fault_injection, "fault_injection=%u"},
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{Opt_lazytime, "lazytime"},
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{Opt_nolazytime, "nolazytime"},
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{Opt_quota, "quota"},
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{Opt_noquota, "noquota"},
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{Opt_usrquota, "usrquota"},
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{Opt_grpquota, "grpquota"},
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{Opt_prjquota, "prjquota"},
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{Opt_usrjquota, "usrjquota=%s"},
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{Opt_grpjquota, "grpjquota=%s"},
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{Opt_prjjquota, "prjjquota=%s"},
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{Opt_offusrjquota, "usrjquota="},
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{Opt_offgrpjquota, "grpjquota="},
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{Opt_offprjjquota, "prjjquota="},
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{Opt_jqfmt_vfsold, "jqfmt=vfsold"},
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{Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
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{Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
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{Opt_err, NULL},
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};
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void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
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{
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struct va_format vaf;
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va_list args;
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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printk_ratelimited("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
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va_end(args);
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}
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static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
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{
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block_t limit = (sbi->user_block_count << 1) / 1000;
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/* limit is 0.2% */
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if (test_opt(sbi, RESERVE_ROOT) && sbi->root_reserved_blocks > limit) {
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sbi->root_reserved_blocks = limit;
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f2fs_msg(sbi->sb, KERN_INFO,
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"Reduce reserved blocks for root = %u",
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sbi->root_reserved_blocks);
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}
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if (!test_opt(sbi, RESERVE_ROOT) &&
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(!uid_eq(sbi->s_resuid,
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make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
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!gid_eq(sbi->s_resgid,
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make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
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f2fs_msg(sbi->sb, KERN_INFO,
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"Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
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from_kuid_munged(&init_user_ns, sbi->s_resuid),
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from_kgid_munged(&init_user_ns, sbi->s_resgid));
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}
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static void init_once(void *foo)
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{
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struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
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inode_init_once(&fi->vfs_inode);
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}
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#ifdef CONFIG_QUOTA
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static const char * const quotatypes[] = INITQFNAMES;
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#define QTYPE2NAME(t) (quotatypes[t])
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static int f2fs_set_qf_name(struct super_block *sb, int qtype,
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substring_t *args)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(sb);
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char *qname;
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int ret = -EINVAL;
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if (sb_any_quota_loaded(sb) && !sbi->s_qf_names[qtype]) {
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f2fs_msg(sb, KERN_ERR,
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"Cannot change journaled "
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"quota options when quota turned on");
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return -EINVAL;
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}
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if (f2fs_sb_has_quota_ino(sb)) {
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f2fs_msg(sb, KERN_INFO,
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"QUOTA feature is enabled, so ignore qf_name");
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return 0;
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}
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qname = match_strdup(args);
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if (!qname) {
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f2fs_msg(sb, KERN_ERR,
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"Not enough memory for storing quotafile name");
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return -EINVAL;
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}
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if (sbi->s_qf_names[qtype]) {
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if (strcmp(sbi->s_qf_names[qtype], qname) == 0)
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ret = 0;
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else
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f2fs_msg(sb, KERN_ERR,
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"%s quota file already specified",
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QTYPE2NAME(qtype));
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goto errout;
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}
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if (strchr(qname, '/')) {
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f2fs_msg(sb, KERN_ERR,
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"quotafile must be on filesystem root");
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goto errout;
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}
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sbi->s_qf_names[qtype] = qname;
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set_opt(sbi, QUOTA);
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return 0;
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errout:
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kfree(qname);
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return ret;
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}
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static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(sb);
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if (sb_any_quota_loaded(sb) && sbi->s_qf_names[qtype]) {
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f2fs_msg(sb, KERN_ERR, "Cannot change journaled quota options"
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" when quota turned on");
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return -EINVAL;
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}
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kfree(sbi->s_qf_names[qtype]);
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sbi->s_qf_names[qtype] = NULL;
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return 0;
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}
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static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
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{
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/*
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* We do the test below only for project quotas. 'usrquota' and
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* 'grpquota' mount options are allowed even without quota feature
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* to support legacy quotas in quota files.
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*/
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if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi->sb)) {
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f2fs_msg(sbi->sb, KERN_ERR, "Project quota feature not enabled. "
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"Cannot enable project quota enforcement.");
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return -1;
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}
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if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA] ||
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sbi->s_qf_names[PRJQUOTA]) {
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if (test_opt(sbi, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
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clear_opt(sbi, USRQUOTA);
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if (test_opt(sbi, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA])
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clear_opt(sbi, GRPQUOTA);
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if (test_opt(sbi, PRJQUOTA) && sbi->s_qf_names[PRJQUOTA])
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clear_opt(sbi, PRJQUOTA);
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if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
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test_opt(sbi, PRJQUOTA)) {
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f2fs_msg(sbi->sb, KERN_ERR, "old and new quota "
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"format mixing");
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return -1;
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}
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if (!sbi->s_jquota_fmt) {
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f2fs_msg(sbi->sb, KERN_ERR, "journaled quota format "
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"not specified");
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return -1;
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}
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}
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if (f2fs_sb_has_quota_ino(sbi->sb) && sbi->s_jquota_fmt) {
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f2fs_msg(sbi->sb, KERN_INFO,
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"QUOTA feature is enabled, so ignore jquota_fmt");
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sbi->s_jquota_fmt = 0;
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}
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if (f2fs_sb_has_quota_ino(sbi->sb) && sb_rdonly(sbi->sb)) {
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f2fs_msg(sbi->sb, KERN_INFO,
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"Filesystem with quota feature cannot be mounted RDWR "
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"without CONFIG_QUOTA");
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return -1;
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}
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return 0;
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}
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#endif
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static int parse_options(struct super_block *sb, char *options)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(sb);
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struct request_queue *q;
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substring_t args[MAX_OPT_ARGS];
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char *p, *name;
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int arg = 0;
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kuid_t uid;
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kgid_t gid;
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#ifdef CONFIG_QUOTA
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int ret;
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#endif
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if (!options)
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return 0;
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while ((p = strsep(&options, ",")) != NULL) {
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int token;
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if (!*p)
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continue;
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/*
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* Initialize args struct so we know whether arg was
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* found; some options take optional arguments.
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*/
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args[0].to = args[0].from = NULL;
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token = match_token(p, f2fs_tokens, args);
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switch (token) {
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case Opt_gc_background:
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name = match_strdup(&args[0]);
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if (!name)
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return -ENOMEM;
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if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
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set_opt(sbi, BG_GC);
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clear_opt(sbi, FORCE_FG_GC);
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} else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
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clear_opt(sbi, BG_GC);
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clear_opt(sbi, FORCE_FG_GC);
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} else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
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set_opt(sbi, BG_GC);
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set_opt(sbi, FORCE_FG_GC);
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} else {
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kfree(name);
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return -EINVAL;
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}
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kfree(name);
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break;
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case Opt_disable_roll_forward:
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set_opt(sbi, DISABLE_ROLL_FORWARD);
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break;
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case Opt_norecovery:
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/* this option mounts f2fs with ro */
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set_opt(sbi, DISABLE_ROLL_FORWARD);
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if (!f2fs_readonly(sb))
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return -EINVAL;
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break;
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case Opt_discard:
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q = bdev_get_queue(sb->s_bdev);
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if (blk_queue_discard(q)) {
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set_opt(sbi, DISCARD);
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} else if (!f2fs_sb_mounted_blkzoned(sb)) {
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f2fs_msg(sb, KERN_WARNING,
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"mounting with \"discard\" option, but "
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"the device does not support discard");
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}
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break;
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case Opt_nodiscard:
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if (f2fs_sb_mounted_blkzoned(sb)) {
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f2fs_msg(sb, KERN_WARNING,
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"discard is required for zoned block devices");
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return -EINVAL;
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}
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clear_opt(sbi, DISCARD);
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break;
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case Opt_noheap:
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set_opt(sbi, NOHEAP);
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break;
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case Opt_heap:
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clear_opt(sbi, NOHEAP);
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break;
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#ifdef CONFIG_F2FS_FS_XATTR
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case Opt_user_xattr:
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set_opt(sbi, XATTR_USER);
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break;
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case Opt_nouser_xattr:
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clear_opt(sbi, XATTR_USER);
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break;
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case Opt_inline_xattr:
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set_opt(sbi, INLINE_XATTR);
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break;
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case Opt_noinline_xattr:
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clear_opt(sbi, INLINE_XATTR);
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break;
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case Opt_inline_xattr_size:
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if (args->from && match_int(args, &arg))
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return -EINVAL;
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set_opt(sbi, INLINE_XATTR_SIZE);
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sbi->inline_xattr_size = arg;
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break;
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#else
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case Opt_user_xattr:
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f2fs_msg(sb, KERN_INFO,
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"user_xattr options not supported");
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break;
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case Opt_nouser_xattr:
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f2fs_msg(sb, KERN_INFO,
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"nouser_xattr options not supported");
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break;
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case Opt_inline_xattr:
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f2fs_msg(sb, KERN_INFO,
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"inline_xattr options not supported");
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break;
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case Opt_noinline_xattr:
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f2fs_msg(sb, KERN_INFO,
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"noinline_xattr options not supported");
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break;
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#endif
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#ifdef CONFIG_F2FS_FS_POSIX_ACL
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case Opt_acl:
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set_opt(sbi, POSIX_ACL);
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break;
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case Opt_noacl:
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clear_opt(sbi, POSIX_ACL);
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break;
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#else
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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_reserve_root:
|
|
if (args->from && match_int(args, &arg))
|
|
return -EINVAL;
|
|
if (test_opt(sbi, RESERVE_ROOT)) {
|
|
f2fs_msg(sb, KERN_INFO,
|
|
"Preserve previous reserve_root=%u",
|
|
sbi->root_reserved_blocks);
|
|
} else {
|
|
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_msg(sb, KERN_ERR,
|
|
"Invalid uid value %d", arg);
|
|
return -EINVAL;
|
|
}
|
|
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_msg(sb, KERN_ERR,
|
|
"Invalid gid value %d", arg);
|
|
return -EINVAL;
|
|
}
|
|
sbi->s_resgid = gid;
|
|
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_io_size_bits:
|
|
if (args->from && match_int(args, &arg))
|
|
return -EINVAL;
|
|
if (arg > __ilog2_u32(BIO_MAX_PAGES)) {
|
|
f2fs_msg(sb, KERN_WARNING,
|
|
"Not support %d, larger than %d",
|
|
1 << arg, BIO_MAX_PAGES);
|
|
return -EINVAL;
|
|
}
|
|
sbi->write_io_size_bits = arg;
|
|
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);
|
|
set_opt(sbi, FAULT_INJECTION);
|
|
#else
|
|
f2fs_msg(sb, KERN_INFO,
|
|
"FAULT_INJECTION was not selected");
|
|
#endif
|
|
break;
|
|
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:
|
|
sbi->s_jquota_fmt = QFMT_VFS_OLD;
|
|
break;
|
|
case Opt_jqfmt_vfsv0:
|
|
sbi->s_jquota_fmt = QFMT_VFS_V0;
|
|
break;
|
|
case Opt_jqfmt_vfsv1:
|
|
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_msg(sb, KERN_INFO,
|
|
"quota operations not supported");
|
|
break;
|
|
#endif
|
|
default:
|
|
f2fs_msg(sb, KERN_ERR,
|
|
"Unrecognized mount option \"%s\" or missing value",
|
|
p);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
#ifdef CONFIG_QUOTA
|
|
if (f2fs_check_quota_options(sbi))
|
|
return -EINVAL;
|
|
#endif
|
|
|
|
if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
|
|
f2fs_msg(sb, KERN_ERR,
|
|
"Should set mode=lfs with %uKB-sized IO",
|
|
F2FS_IO_SIZE_KB(sbi));
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (test_opt(sbi, INLINE_XATTR_SIZE)) {
|
|
if (!test_opt(sbi, INLINE_XATTR)) {
|
|
f2fs_msg(sb, KERN_ERR,
|
|
"inline_xattr_size option should be "
|
|
"set with inline_xattr option");
|
|
return -EINVAL;
|
|
}
|
|
if (!sbi->inline_xattr_size ||
|
|
sbi->inline_xattr_size >= DEF_ADDRS_PER_INODE -
|
|
F2FS_TOTAL_EXTRA_ATTR_SIZE -
|
|
DEF_INLINE_RESERVED_SIZE -
|
|
DEF_MIN_INLINE_SIZE) {
|
|
f2fs_msg(sb, KERN_ERR,
|
|
"inline xattr size is out of range");
|
|
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);
|
|
|
|
/* Initialize f2fs-specific inode info */
|
|
atomic_set(&fi->dirty_pages, 0);
|
|
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_ilist);
|
|
INIT_LIST_HEAD(&fi->inmem_pages);
|
|
mutex_init(&fi->inmem_lock);
|
|
init_rwsem(&fi->dio_rwsem[READ]);
|
|
init_rwsem(&fi->dio_rwsem[WRITE]);
|
|
init_rwsem(&fi->i_mmap_sem);
|
|
init_rwsem(&fi->i_xattr_sem);
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
memset(&fi->i_dquot, 0, sizeof(fi->i_dquot));
|
|
fi->i_reserved_quota = 0;
|
|
#endif
|
|
/* 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)
|
|
{
|
|
int ret;
|
|
/*
|
|
* 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);
|
|
|
|
sb_start_intwrite(inode->i_sb);
|
|
f2fs_i_size_write(inode, 0);
|
|
|
|
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);
|
|
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 (flags == I_DIRTY_TIME)
|
|
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)
|
|
{
|
|
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 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
|
|
kfree(FDEV(i).blkz_type);
|
|
#endif
|
|
}
|
|
kfree(sbi->devs);
|
|
}
|
|
|
|
static void f2fs_put_super(struct super_block *sb)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_SB(sb);
|
|
int i;
|
|
bool dropped;
|
|
|
|
f2fs_quota_off_umount(sb);
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/* be sure to wait for any on-going discard commands */
|
|
dropped = f2fs_wait_discard_bios(sbi);
|
|
|
|
if (f2fs_discard_en(sbi) && !sbi->discard_blks && !dropped) {
|
|
struct cp_control cpc = {
|
|
.reason = CP_UMOUNT | CP_TRIMMED,
|
|
};
|
|
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_writes(sbi);
|
|
|
|
iput(sbi->node_inode);
|
|
iput(sbi->meta_inode);
|
|
|
|
/* destroy f2fs internal modules */
|
|
destroy_node_manager(sbi);
|
|
destroy_segment_manager(sbi);
|
|
|
|
kfree(sbi->ckpt);
|
|
|
|
f2fs_unregister_sysfs(sbi);
|
|
|
|
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);
|
|
mempool_destroy(sbi->write_io_dummy);
|
|
#ifdef CONFIG_QUOTA
|
|
for (i = 0; i < MAXQUOTAS; i++)
|
|
kfree(sbi->s_qf_names[i]);
|
|
#endif
|
|
destroy_percpu_info(sbi);
|
|
for (i = 0; i < NR_PAGE_TYPE; i++)
|
|
kfree(sbi->write_io[i]);
|
|
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;
|
|
|
|
trace_f2fs_sync_fs(sb, sync);
|
|
|
|
if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
|
|
return -EAGAIN;
|
|
|
|
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;
|
|
}
|
|
|
|
#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(&dq_data_lock);
|
|
|
|
limit = (dquot->dq_dqb.dqb_bsoftlimit ?
|
|
dquot->dq_dqb.dqb_bsoftlimit :
|
|
dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits;
|
|
if (limit && buf->f_blocks > limit) {
|
|
curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
|
|
buf->f_blocks = limit;
|
|
buf->f_bfree = buf->f_bavail =
|
|
(buf->f_blocks > curblock) ?
|
|
(buf->f_blocks - curblock) : 0;
|
|
}
|
|
|
|
limit = dquot->dq_dqb.dqb_isoftlimit ?
|
|
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(&dq_data_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;
|
|
|
|
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);
|
|
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) -
|
|
sbi->current_reserved_blocks;
|
|
if (buf->f_bfree > sbi->root_reserved_blocks)
|
|
buf->f_bavail = buf->f_bfree - sbi->root_reserved_blocks;
|
|
else
|
|
buf->f_bavail = 0;
|
|
|
|
avail_node_count = sbi->total_node_count - sbi->nquota_files -
|
|
F2FS_RESERVED_NODE_NUM;
|
|
|
|
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 - 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);
|
|
|
|
#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 (sbi->s_jquota_fmt) {
|
|
char *fmtname = "";
|
|
|
|
switch (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 (sbi->s_qf_names[USRQUOTA])
|
|
seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]);
|
|
|
|
if (sbi->s_qf_names[GRPQUOTA])
|
|
seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]);
|
|
|
|
if (sbi->s_qf_names[PRJQUOTA])
|
|
seq_show_option(seq, "prjjquota", sbi->s_qf_names[PRJQUOTA]);
|
|
#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_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");
|
|
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",
|
|
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, 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");
|
|
seq_printf(seq, ",active_logs=%u", sbi->active_logs);
|
|
if (test_opt(sbi, RESERVE_ROOT))
|
|
seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
|
|
sbi->root_reserved_blocks,
|
|
from_kuid_munged(&init_user_ns, sbi->s_resuid),
|
|
from_kgid_munged(&init_user_ns, sbi->s_resgid));
|
|
if (F2FS_IO_SIZE_BITS(sbi))
|
|
seq_printf(seq, ",io_size=%uKB", F2FS_IO_SIZE_KB(sbi));
|
|
#ifdef CONFIG_F2FS_FAULT_INJECTION
|
|
if (test_opt(sbi, FAULT_INJECTION))
|
|
seq_printf(seq, ",fault_injection=%u",
|
|
sbi->fault_info.inject_rate);
|
|
#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);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void default_options(struct f2fs_sb_info *sbi)
|
|
{
|
|
/* init some FS parameters */
|
|
sbi->active_logs = NR_CURSEG_TYPE;
|
|
sbi->inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
|
|
|
|
set_opt(sbi, BG_GC);
|
|
set_opt(sbi, INLINE_XATTR);
|
|
set_opt(sbi, INLINE_DATA);
|
|
set_opt(sbi, INLINE_DENTRY);
|
|
set_opt(sbi, EXTENT_CACHE);
|
|
set_opt(sbi, NOHEAP);
|
|
sbi->sb->s_flags |= SB_LAZYTIME;
|
|
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
|
|
}
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
static int f2fs_enable_quotas(struct super_block *sb);
|
|
#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;
|
|
unsigned long old_sb_flags;
|
|
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
|
|
#ifdef CONFIG_QUOTA
|
|
int s_jquota_fmt;
|
|
char *s_qf_names[MAXQUOTAS];
|
|
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;
|
|
active_logs = sbi->active_logs;
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
s_jquota_fmt = sbi->s_jquota_fmt;
|
|
for (i = 0; i < MAXQUOTAS; i++) {
|
|
if (sbi->s_qf_names[i]) {
|
|
s_qf_names[i] = kstrdup(sbi->s_qf_names[i],
|
|
GFP_KERNEL);
|
|
if (!s_qf_names[i]) {
|
|
for (j = 0; j < i; j++)
|
|
kfree(s_qf_names[j]);
|
|
return -ENOMEM;
|
|
}
|
|
} else {
|
|
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_msg(sb, KERN_INFO,
|
|
"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);
|
|
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;
|
|
|
|
#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 & MS_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(sb)) {
|
|
err = f2fs_enable_quotas(sb);
|
|
if (err)
|
|
goto restore_opts;
|
|
}
|
|
}
|
|
#endif
|
|
/* 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 & SB_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 & SB_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 & SB_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:
|
|
#ifdef CONFIG_QUOTA
|
|
/* Release old quota file names */
|
|
for (i = 0; i < MAXQUOTAS; i++)
|
|
kfree(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);
|
|
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:
|
|
#ifdef CONFIG_QUOTA
|
|
sbi->s_jquota_fmt = s_jquota_fmt;
|
|
for (i = 0; i < MAXQUOTAS; i++) {
|
|
kfree(sbi->s_qf_names[i]);
|
|
sbi->s_qf_names[i] = s_qf_names[i];
|
|
}
|
|
#endif
|
|
sbi->mount_opt = org_mount_opt;
|
|
sbi->active_logs = active_logs;
|
|
sb->s_flags = old_sb_flags;
|
|
#ifdef CONFIG_F2FS_FAULT_INJECTION
|
|
sbi->fault_info = ffi;
|
|
#endif
|
|
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;
|
|
char *kaddr;
|
|
|
|
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_mapping_page(mapping, blkidx, NULL);
|
|
if (IS_ERR(page)) {
|
|
if (PTR_ERR(page) == -ENOMEM) {
|
|
congestion_wait(BLK_RW_ASYNC, HZ/50);
|
|
goto repeat;
|
|
}
|
|
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);
|
|
return -EIO;
|
|
}
|
|
|
|
kaddr = kmap_atomic(page);
|
|
memcpy(data, kaddr + offset, tocopy);
|
|
kunmap_atomic(kaddr);
|
|
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;
|
|
char *kaddr;
|
|
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, 0,
|
|
&page, NULL);
|
|
if (unlikely(err)) {
|
|
if (err == -ENOMEM) {
|
|
congestion_wait(BLK_RW_ASYNC, HZ/50);
|
|
goto retry;
|
|
}
|
|
break;
|
|
}
|
|
|
|
kaddr = kmap_atomic(page);
|
|
memcpy(kaddr + offset, data, tocopy);
|
|
kunmap_atomic(kaddr);
|
|
flush_dcache_page(page);
|
|
|
|
a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
|
|
page, NULL);
|
|
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;
|
|
}
|
|
|
|
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)
|
|
{
|
|
return dquot_quota_on_mount(sbi->sb, sbi->s_qf_names[type],
|
|
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->sb) && rdonly) {
|
|
err = f2fs_enable_quotas(sbi->sb);
|
|
if (err) {
|
|
f2fs_msg(sbi->sb, KERN_ERR,
|
|
"Cannot turn on quota_ino: %d", err);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
for (i = 0; i < MAXQUOTAS; i++) {
|
|
if (sbi->s_qf_names[i]) {
|
|
err = f2fs_quota_on_mount(sbi, i);
|
|
if (!err) {
|
|
enabled = 1;
|
|
continue;
|
|
}
|
|
f2fs_msg(sbi->sb, KERN_ERR,
|
|
"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(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_msg(sb, KERN_ERR,
|
|
"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_enable(qf_inode, type, format_id, flags);
|
|
iput(qf_inode);
|
|
return err;
|
|
}
|
|
|
|
static int f2fs_enable_quotas(struct super_block *sb)
|
|
{
|
|
int type, err = 0;
|
|
unsigned long qf_inum;
|
|
bool quota_mopt[MAXQUOTAS] = {
|
|
test_opt(F2FS_SB(sb), USRQUOTA),
|
|
test_opt(F2FS_SB(sb), GRPQUOTA),
|
|
test_opt(F2FS_SB(sb), PRJQUOTA),
|
|
};
|
|
|
|
sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY;
|
|
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_msg(sb, KERN_ERR,
|
|
"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);
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int f2fs_quota_sync(struct super_block *sb, int type)
|
|
{
|
|
struct quota_info *dqopt = sb_dqopt(sb);
|
|
int cnt;
|
|
int ret;
|
|
|
|
ret = dquot_writeback_dquots(sb, type);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
ret = filemap_write_and_wait(dqopt->files[cnt]->i_mapping);
|
|
if (ret)
|
|
return ret;
|
|
|
|
inode_lock(dqopt->files[cnt]);
|
|
truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
|
|
inode_unlock(dqopt->files[cnt]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
|
|
const struct path *path)
|
|
{
|
|
struct inode *inode;
|
|
int err;
|
|
|
|
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 |= FS_NOATIME_FL | FS_IMMUTABLE_FL;
|
|
inode_set_flags(inode, S_NOATIME | S_IMMUTABLE,
|
|
S_NOATIME | S_IMMUTABLE);
|
|
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);
|
|
|
|
f2fs_quota_sync(sb, type);
|
|
|
|
err = dquot_quota_off(sb, type);
|
|
if (err || f2fs_sb_has_quota_ino(sb))
|
|
goto out_put;
|
|
|
|
inode_lock(inode);
|
|
F2FS_I(inode)->i_flags &= ~(FS_NOATIME_FL | FS_IMMUTABLE_FL);
|
|
inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE);
|
|
inode_unlock(inode);
|
|
f2fs_mark_inode_dirty_sync(inode, false);
|
|
out_put:
|
|
iput(inode);
|
|
return err;
|
|
}
|
|
|
|
void f2fs_quota_off_umount(struct super_block *sb)
|
|
{
|
|
int type;
|
|
|
|
for (type = 0; type < MAXQUOTAS; type++)
|
|
f2fs_quota_off(sb, type);
|
|
}
|
|
|
|
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 = dquot_commit,
|
|
.acquire_dquot = dquot_acquire,
|
|
.release_dquot = dquot_release,
|
|
.mark_dirty = dquot_mark_dquot_dirty,
|
|
.write_info = 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
|
|
void f2fs_quota_off_umount(struct super_block *sb)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static const 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,
|
|
#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_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_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 const struct fscrypt_operations f2fs_cryptops = {
|
|
.key_prefix = "f2fs:",
|
|
.get_context = f2fs_get_context,
|
|
.set_context = f2fs_set_context,
|
|
.empty_dir = f2fs_empty_dir,
|
|
.max_namelen = f2fs_max_namelen,
|
|
};
|
|
#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 = 0;
|
|
loff_t leaf_count = ADDRS_PER_BLOCK;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
/* 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, 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_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;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
|
|
if (sanity_check_area_boundary(sbi, bh))
|
|
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 ovp_segments, reserved_segments;
|
|
unsigned int main_segs, blocks_per_seg;
|
|
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(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;
|
|
}
|
|
|
|
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, j;
|
|
|
|
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);
|
|
|
|
atomic_set(&sbi->wb_sync_req, 0);
|
|
|
|
INIT_LIST_HEAD(&sbi->s_list);
|
|
mutex_init(&sbi->umount_mutex);
|
|
for (i = 0; i < NR_PAGE_TYPE - 1; i++)
|
|
for (j = HOT; j < NR_TEMP_TYPE; j++)
|
|
mutex_init(&sbi->wio_mutex[i][j]);
|
|
spin_lock_init(&sbi->cp_lock);
|
|
|
|
sbi->dirty_device = 0;
|
|
spin_lock_init(&sbi->dev_lock);
|
|
}
|
|
|
|
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;
|
|
|
|
return percpu_counter_init(&sbi->total_valid_inode_count, 0,
|
|
GFP_KERNEL);
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
|
|
{
|
|
struct block_device *bdev = FDEV(devi).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;
|
|
|
|
if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
|
|
SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
|
|
return -EINVAL;
|
|
sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
|
|
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 & (bdev_zone_sectors(bdev) - 1))
|
|
FDEV(devi).nr_blkz++;
|
|
|
|
FDEV(devi).blkz_type = f2fs_kmalloc(sbi, FDEV(devi).nr_blkz,
|
|
GFP_KERNEL);
|
|
if (!FDEV(devi).blkz_type)
|
|
return -ENOMEM;
|
|
|
|
#define F2FS_REPORT_NR_ZONES 4096
|
|
|
|
zones = f2fs_kzalloc(sbi, sizeof(struct blk_zone) *
|
|
F2FS_REPORT_NR_ZONES, 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++) {
|
|
FDEV(devi).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_scan_devices(struct f2fs_sb_info *sbi)
|
|
{
|
|
struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
|
|
unsigned int max_devices = MAX_DEVICES;
|
|
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, sizeof(struct f2fs_dev_info) *
|
|
max_devices, GFP_KERNEL);
|
|
if (!sbi->devs)
|
|
return -ENOMEM;
|
|
|
|
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;
|
|
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
|
|
!f2fs_sb_mounted_blkzoned(sbi->sb)) {
|
|
f2fs_msg(sbi->sb, KERN_ERR,
|
|
"Zoned block device feature not enabled\n");
|
|
return -EINVAL;
|
|
}
|
|
if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
|
|
if (init_blkz_info(sbi, i)) {
|
|
f2fs_msg(sbi->sb, KERN_ERR,
|
|
"Failed to initialize F2FS blkzone information");
|
|
return -EINVAL;
|
|
}
|
|
if (max_devices == 1)
|
|
break;
|
|
f2fs_msg(sbi->sb, KERN_INFO,
|
|
"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_msg(sbi->sb, KERN_INFO,
|
|
"Mount Device [%2d]: %20s, %8u, %8x - %8x",
|
|
i, FDEV(i).path,
|
|
FDEV(i).total_segments,
|
|
FDEV(i).start_blk, FDEV(i).end_blk);
|
|
}
|
|
f2fs_msg(sbi->sb, KERN_INFO,
|
|
"IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
|
|
/* Load the checksum driver */
|
|
sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
|
|
if (IS_ERR(sbi->s_chksum_driver)) {
|
|
f2fs_msg(sb, KERN_ERR, "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_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;
|
|
|
|
sbi->s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
|
|
sbi->s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
|
|
|
|
/* precompute checksum seed for metadata */
|
|
if (f2fs_sb_has_inode_chksum(sb))
|
|
sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
|
|
sizeof(raw_super->uuid));
|
|
|
|
/*
|
|
* 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");
|
|
err = -EOPNOTSUPP;
|
|
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));
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
sb->dq_op = &f2fs_quota_operations;
|
|
if (f2fs_sb_has_quota_ino(sb))
|
|
sb->s_qcop = &dquot_quotactl_sysfile_ops;
|
|
else
|
|
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->sb)) {
|
|
for (i = 0; i < MAXQUOTAS; i++) {
|
|
if (f2fs_qf_ino(sbi->sb, i))
|
|
sbi->nquota_files++;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
sb->s_op = &f2fs_sops;
|
|
#ifdef CONFIG_F2FS_FS_ENCRYPTION
|
|
sb->s_cop = &f2fs_cryptops;
|
|
#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;
|
|
mutex_init(&sbi->gc_mutex);
|
|
mutex_init(&sbi->cp_mutex);
|
|
init_rwsem(&sbi->node_write);
|
|
init_rwsem(&sbi->node_change);
|
|
|
|
/* disallow all the data/node/meta page writes */
|
|
set_sbi_flag(sbi, SBI_POR_DOING);
|
|
spin_lock_init(&sbi->stat_lock);
|
|
|
|
/* init iostat info */
|
|
spin_lock_init(&sbi->iostat_lock);
|
|
sbi->iostat_enable = false;
|
|
|
|
for (i = 0; i < NR_PAGE_TYPE; i++) {
|
|
int n = (i == META) ? 1: NR_TEMP_TYPE;
|
|
int j;
|
|
|
|
sbi->write_io[i] = f2fs_kmalloc(sbi,
|
|
n * sizeof(struct f2fs_bio_info),
|
|
GFP_KERNEL);
|
|
if (!sbi->write_io[i]) {
|
|
err = -ENOMEM;
|
|
goto free_options;
|
|
}
|
|
|
|
for (j = HOT; j < n; j++) {
|
|
init_rwsem(&sbi->write_io[i][j].io_rwsem);
|
|
sbi->write_io[i][j].sbi = sbi;
|
|
sbi->write_io[i][j].bio = NULL;
|
|
spin_lock_init(&sbi->write_io[i][j].io_lock);
|
|
INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
|
|
}
|
|
}
|
|
|
|
init_rwsem(&sbi->cp_rwsem);
|
|
init_waitqueue_head(&sbi->cp_wait);
|
|
init_sb_info(sbi);
|
|
|
|
err = init_percpu_info(sbi);
|
|
if (err)
|
|
goto free_bio_info;
|
|
|
|
if (F2FS_IO_SIZE(sbi) > 1) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
/* 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_io_dummy;
|
|
}
|
|
|
|
err = get_valid_checkpoint(sbi);
|
|
if (err) {
|
|
f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
|
|
goto free_meta_inode;
|
|
}
|
|
|
|
/* Initialize device list */
|
|
err = f2fs_scan_devices(sbi);
|
|
if (err) {
|
|
f2fs_msg(sb, KERN_ERR, "Failed to find devices");
|
|
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);
|
|
|
|
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);
|
|
|
|
/* 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;
|
|
}
|
|
|
|
err = f2fs_build_stats(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_stats;
|
|
}
|
|
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_register_sysfs(sbi);
|
|
if (err)
|
|
goto free_root_inode;
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
/*
|
|
* Turn on quotas which were not enabled for read-only mounts if
|
|
* filesystem has quota feature, so that they are updated correctly.
|
|
*/
|
|
if (f2fs_sb_has_quota_ino(sb) && !sb_rdonly(sb)) {
|
|
err = f2fs_enable_quotas(sb);
|
|
if (err) {
|
|
f2fs_msg(sb, KERN_ERR,
|
|
"Cannot turn on quotas: error %d", err);
|
|
goto free_sysfs;
|
|
}
|
|
}
|
|
#endif
|
|
/* if there are nt orphan nodes free them */
|
|
err = recover_orphan_inodes(sbi);
|
|
if (err)
|
|
goto free_meta;
|
|
|
|
/* 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_meta;
|
|
}
|
|
|
|
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_meta;
|
|
}
|
|
} 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_meta;
|
|
}
|
|
}
|
|
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_meta;
|
|
}
|
|
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_join_shrinker(sbi);
|
|
|
|
f2fs_msg(sbi->sb, KERN_NOTICE, "Mounted with checkpoint version = %llx",
|
|
cur_cp_version(F2FS_CKPT(sbi)));
|
|
f2fs_update_time(sbi, CP_TIME);
|
|
f2fs_update_time(sbi, REQ_TIME);
|
|
return 0;
|
|
|
|
free_meta:
|
|
#ifdef CONFIG_QUOTA
|
|
if (f2fs_sb_has_quota_ino(sb) && !sb_rdonly(sb))
|
|
f2fs_quota_off_umount(sbi->sb);
|
|
#endif
|
|
f2fs_sync_inode_meta(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_final(META_MAPPING(sbi));
|
|
#ifdef CONFIG_QUOTA
|
|
free_sysfs:
|
|
#endif
|
|
f2fs_unregister_sysfs(sbi);
|
|
free_root_inode:
|
|
dput(sb->s_root);
|
|
sb->s_root = NULL;
|
|
free_stats:
|
|
f2fs_destroy_stats(sbi);
|
|
free_node_inode:
|
|
release_ino_entry(sbi, true);
|
|
truncate_inode_pages_final(NODE_MAPPING(sbi));
|
|
iput(sbi->node_inode);
|
|
free_nm:
|
|
destroy_node_manager(sbi);
|
|
free_sm:
|
|
destroy_segment_manager(sbi);
|
|
free_devices:
|
|
destroy_device_list(sbi);
|
|
kfree(sbi->ckpt);
|
|
free_meta_inode:
|
|
make_bad_inode(sbi->meta_inode);
|
|
iput(sbi->meta_inode);
|
|
free_io_dummy:
|
|
mempool_destroy(sbi->write_io_dummy);
|
|
free_percpu:
|
|
destroy_percpu_info(sbi);
|
|
free_bio_info:
|
|
for (i = 0; i < NR_PAGE_TYPE; i++)
|
|
kfree(sbi->write_io[i]);
|
|
free_options:
|
|
#ifdef CONFIG_QUOTA
|
|
for (i = 0; i < MAXQUOTAS; i++)
|
|
kfree(sbi->s_qf_names[i]);
|
|
#endif
|
|
kfree(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) {
|
|
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);
|
|
stop_gc_thread(F2FS_SB(sb));
|
|
stop_discard_thread(F2FS_SB(sb));
|
|
}
|
|
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 = 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;
|
|
|
|
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;
|
|
err = f2fs_init_sysfs();
|
|
if (err)
|
|
goto free_extent_cache;
|
|
err = register_shrinker(&f2fs_shrinker_info);
|
|
if (err)
|
|
goto free_sysfs;
|
|
err = register_filesystem(&f2fs_fs_type);
|
|
if (err)
|
|
goto free_shrinker;
|
|
err = f2fs_create_root_stats();
|
|
if (err)
|
|
goto free_filesystem;
|
|
return 0;
|
|
|
|
free_filesystem:
|
|
unregister_filesystem(&f2fs_fs_type);
|
|
free_shrinker:
|
|
unregister_shrinker(&f2fs_shrinker_info);
|
|
free_sysfs:
|
|
f2fs_exit_sysfs();
|
|
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)
|
|
{
|
|
f2fs_destroy_root_stats();
|
|
unregister_filesystem(&f2fs_fs_type);
|
|
unregister_shrinker(&f2fs_shrinker_info);
|
|
f2fs_exit_sysfs();
|
|
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");
|
|
|