![Linus Torvalds](/assets/img/avatar_default.png)
This patch-set includes the following major enhancement patches. o introduce a new gloabl lock scheme o add tracepoints on several major functions o fix the overall cleaning process focused on victim selection o apply the block plugging to merge IOs as much as possible o enhance management of free nids and its list o enhance the readahead mode for node pages o address several cretical deadlock conditions o reduce lock_page calls The other minor bug fixes and enhancements are as follows. o calculation mistakes: overflow o bio types: READ, READA, and READ_SYNC o fix the recovery flow, data races, and null pointer errors -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJRijCLAAoJEEAUqH6CSFDSg9kQAIqxmQzCUvCN3HcyVe8bGhKz 8xhKrAY6ySRCKMuBbFRQsNrXUhckE3A44DgzYm5/gQikr/c8zhbqPVrtZ968eCKb wm3J+Re/uwZr5eOXlJEaHIiSkMDtERN7Cu2oYJWZi2B9wCSZcgvoWQ3c3LUVk6yF GFdi1Y00ll5tFKbEGbXSsfdul9P8jp0MmuMnWBBQZF3TrjETXMdThA5FXN0yTf9s XkcGE9vTCCPk8p7P3YmGGw6CwlaL8oallm0//iL4nMNpJzveq2C09IlY2BNrxU3L iTNXeIBdbhwXpnh2zq26Cy+cIEDIp0oXYui5BYdr/LWyWU3T/INa+hjUUszsESxF 51LIUA1rA9nX/BSmj2QomswZ3lt4u5jl6rSBFKv3NG1KsFrAdb8S4tHukRSTSxAJ gzpY6kLT1+bgciA16F5W4yhzMYPN5hPa8s6hx4LHlpoqQICQsurjtS9KW7vncLFt ttmCMn8ehHcTzKRNNqYaBerCtSB3Z3G/uAy1y+DB7Zx2h2mqhCBXRalyRvs7RKvK d5OyYCpHntxuzDwVuivnr9Ddp30LUP1WqexxK+ykn99Ji3leMmffHP8Oari8w96b RxSbjoo8hOgoS5xZ4v3AaqtLDlBpxC6oWJzDaq/fJeKxOx22Z5BDFUM9mBGxrouJ AATl8b+cW/aTZ4l7WOPU =Hqii -----END PGP SIGNATURE----- Merge tag 'f2fs-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "This patch-set includes the following major enhancement patches. - introduce a new gloabl lock scheme - add tracepoints on several major functions - fix the overall cleaning process focused on victim selection - apply the block plugging to merge IOs as much as possible - enhance management of free nids and its list - enhance the readahead mode for node pages - address several cretical deadlock conditions - reduce lock_page calls The other minor bug fixes and enhancements are as follows. - calculation mistakes: overflow - bio types: READ, READA, and READ_SYNC - fix the recovery flow, data races, and null pointer errors" * tag 'f2fs-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (68 commits) f2fs: cover free_nid management with spin_lock f2fs: optimize scan_nat_page() f2fs: code cleanup for scan_nat_page() and build_free_nids() f2fs: bugfix for alloc_nid_failed() f2fs: recover when journal contains deleted files f2fs: continue to mount after failing recovery f2fs: avoid deadlock during evict after f2fs_gc f2fs: modify the number of issued pages to merge IOs f2fs: remove useless #include <linux/proc_fs.h> as we're now using sysfs as debug entry. f2fs: fix inconsistent using of NM_WOUT_THRESHOLD f2fs: check truncation of mapping after lock_page f2fs: enhance alloc_nid and build_free_nids flows f2fs: add a tracepoint on f2fs_new_inode f2fs: check nid == 0 in add_free_nid f2fs: add REQ_META about metadata requests for submit f2fs: give a chance to merge IOs by IO scheduler f2fs: avoid frequent background GC f2fs: add tracepoints to debug checkpoint request f2fs: add tracepoints for write page operations f2fs: add tracepoints to debug the block allocation ...
792 lines
19 KiB
C
792 lines
19 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/random.h>
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#include <linux/exportfs.h>
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#include <linux/blkdev.h>
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#include <linux/f2fs_fs.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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#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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enum {
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Opt_gc_background_off,
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Opt_disable_roll_forward,
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Opt_discard,
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Opt_noheap,
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Opt_nouser_xattr,
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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_err,
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};
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static match_table_t f2fs_tokens = {
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{Opt_gc_background_off, "background_gc_off"},
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{Opt_disable_roll_forward, "disable_roll_forward"},
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{Opt_discard, "discard"},
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{Opt_noheap, "no_heap"},
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{Opt_nouser_xattr, "nouser_xattr"},
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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_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("%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 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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static struct inode *f2fs_alloc_inode(struct super_block *sb)
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{
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struct f2fs_inode_info *fi;
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fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO);
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if (!fi)
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return NULL;
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init_once((void *) fi);
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/* Initialize f2fs-specific inode info */
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fi->vfs_inode.i_version = 1;
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atomic_set(&fi->dirty_dents, 0);
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fi->i_current_depth = 1;
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fi->i_advise = 0;
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rwlock_init(&fi->ext.ext_lock);
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set_inode_flag(fi, FI_NEW_INODE);
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return &fi->vfs_inode;
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}
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static int f2fs_drop_inode(struct inode *inode)
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{
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/*
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* This is to avoid a deadlock condition like below.
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* writeback_single_inode(inode)
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* - f2fs_write_data_page
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* - f2fs_gc -> iput -> evict
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* - inode_wait_for_writeback(inode)
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*/
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if (!inode_unhashed(inode) && inode->i_state & I_SYNC)
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return 0;
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return generic_drop_inode(inode);
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}
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static void f2fs_i_callback(struct rcu_head *head)
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{
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struct inode *inode = container_of(head, struct inode, i_rcu);
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kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
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}
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static void f2fs_destroy_inode(struct inode *inode)
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{
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call_rcu(&inode->i_rcu, f2fs_i_callback);
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}
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static void f2fs_put_super(struct super_block *sb)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(sb);
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f2fs_destroy_stats(sbi);
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stop_gc_thread(sbi);
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write_checkpoint(sbi, true);
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iput(sbi->node_inode);
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iput(sbi->meta_inode);
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/* destroy f2fs internal modules */
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destroy_node_manager(sbi);
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destroy_segment_manager(sbi);
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kfree(sbi->ckpt);
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sb->s_fs_info = NULL;
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brelse(sbi->raw_super_buf);
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kfree(sbi);
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}
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int f2fs_sync_fs(struct super_block *sb, int sync)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(sb);
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trace_f2fs_sync_fs(sb, sync);
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if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES))
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return 0;
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if (sync) {
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mutex_lock(&sbi->gc_mutex);
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write_checkpoint(sbi, false);
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mutex_unlock(&sbi->gc_mutex);
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} else {
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f2fs_balance_fs(sbi);
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}
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return 0;
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}
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static int f2fs_freeze(struct super_block *sb)
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{
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int err;
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if (sb->s_flags & MS_RDONLY)
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return 0;
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err = f2fs_sync_fs(sb, 1);
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return err;
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}
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static int f2fs_unfreeze(struct super_block *sb)
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{
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return 0;
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}
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static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
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{
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struct super_block *sb = dentry->d_sb;
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struct f2fs_sb_info *sbi = F2FS_SB(sb);
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u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
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block_t total_count, user_block_count, start_count, ovp_count;
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total_count = le64_to_cpu(sbi->raw_super->block_count);
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user_block_count = sbi->user_block_count;
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start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
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ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
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buf->f_type = F2FS_SUPER_MAGIC;
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buf->f_bsize = sbi->blocksize;
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buf->f_blocks = total_count - start_count;
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buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count;
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buf->f_bavail = user_block_count - valid_user_blocks(sbi);
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buf->f_files = sbi->total_node_count;
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buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi);
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buf->f_namelen = F2FS_NAME_LEN;
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buf->f_fsid.val[0] = (u32)id;
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buf->f_fsid.val[1] = (u32)(id >> 32);
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return 0;
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}
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static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
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if (test_opt(sbi, BG_GC))
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seq_puts(seq, ",background_gc_on");
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else
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seq_puts(seq, ",background_gc_off");
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if (test_opt(sbi, DISABLE_ROLL_FORWARD))
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seq_puts(seq, ",disable_roll_forward");
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if (test_opt(sbi, DISCARD))
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seq_puts(seq, ",discard");
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if (test_opt(sbi, NOHEAP))
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seq_puts(seq, ",no_heap_alloc");
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#ifdef CONFIG_F2FS_FS_XATTR
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if (test_opt(sbi, XATTR_USER))
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seq_puts(seq, ",user_xattr");
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else
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seq_puts(seq, ",nouser_xattr");
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#endif
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#ifdef CONFIG_F2FS_FS_POSIX_ACL
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if (test_opt(sbi, POSIX_ACL))
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seq_puts(seq, ",acl");
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else
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seq_puts(seq, ",noacl");
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#endif
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if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
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seq_puts(seq, ",disable_ext_identify");
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seq_printf(seq, ",active_logs=%u", sbi->active_logs);
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return 0;
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}
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static struct super_operations f2fs_sops = {
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.alloc_inode = f2fs_alloc_inode,
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.drop_inode = f2fs_drop_inode,
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.destroy_inode = f2fs_destroy_inode,
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.write_inode = f2fs_write_inode,
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.show_options = f2fs_show_options,
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.evict_inode = f2fs_evict_inode,
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.put_super = f2fs_put_super,
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.sync_fs = f2fs_sync_fs,
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.freeze_fs = f2fs_freeze,
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.unfreeze_fs = f2fs_unfreeze,
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.statfs = f2fs_statfs,
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};
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static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
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u64 ino, u32 generation)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(sb);
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struct inode *inode;
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if (ino < F2FS_ROOT_INO(sbi))
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return ERR_PTR(-ESTALE);
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/*
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* f2fs_iget isn't quite right if the inode is currently unallocated!
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* However f2fs_iget currently does appropriate checks to handle stale
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* inodes so everything is OK.
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*/
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inode = f2fs_iget(sb, ino);
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if (IS_ERR(inode))
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return ERR_CAST(inode);
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if (generation && inode->i_generation != generation) {
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/* we didn't find the right inode.. */
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iput(inode);
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return ERR_PTR(-ESTALE);
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}
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return inode;
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}
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static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
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int fh_len, int fh_type)
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{
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return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
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f2fs_nfs_get_inode);
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}
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static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
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int fh_len, int fh_type)
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{
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return generic_fh_to_parent(sb, fid, fh_len, fh_type,
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f2fs_nfs_get_inode);
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}
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static const struct export_operations f2fs_export_ops = {
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.fh_to_dentry = f2fs_fh_to_dentry,
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.fh_to_parent = f2fs_fh_to_parent,
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.get_parent = f2fs_get_parent,
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};
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static int parse_options(struct super_block *sb, struct f2fs_sb_info *sbi,
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char *options)
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{
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substring_t args[MAX_OPT_ARGS];
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char *p;
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int arg = 0;
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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_off:
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clear_opt(sbi, BG_GC);
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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_discard:
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set_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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#ifdef CONFIG_F2FS_FS_XATTR
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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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#else
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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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#endif
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#ifdef CONFIG_F2FS_FS_POSIX_ACL
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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_noacl:
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f2fs_msg(sb, KERN_INFO, "noacl options not supported");
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break;
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#endif
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case Opt_active_logs:
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if (args->from && match_int(args, &arg))
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return -EINVAL;
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if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
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return -EINVAL;
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sbi->active_logs = arg;
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break;
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case Opt_disable_ext_identify:
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set_opt(sbi, DISABLE_EXT_IDENTIFY);
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break;
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default:
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f2fs_msg(sb, KERN_ERR,
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"Unrecognized mount option \"%s\" or missing value",
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p);
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return -EINVAL;
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}
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}
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return 0;
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}
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static loff_t max_file_size(unsigned bits)
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{
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loff_t result = ADDRS_PER_INODE;
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loff_t leaf_count = ADDRS_PER_BLOCK;
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/* two direct node blocks */
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result += (leaf_count * 2);
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/* two indirect node blocks */
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leaf_count *= NIDS_PER_BLOCK;
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result += (leaf_count * 2);
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/* one double indirect node block */
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leaf_count *= NIDS_PER_BLOCK;
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result += leaf_count;
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result <<= bits;
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return result;
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}
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static int sanity_check_raw_super(struct super_block *sb,
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struct f2fs_super_block *raw_super)
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{
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unsigned int blocksize;
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if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
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f2fs_msg(sb, KERN_INFO,
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"Magic Mismatch, valid(0x%x) - read(0x%x)",
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F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
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return 1;
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}
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/* Currently, support only 4KB page cache size */
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if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) {
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f2fs_msg(sb, KERN_INFO,
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"Invalid page_cache_size (%lu), supports only 4KB\n",
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PAGE_CACHE_SIZE);
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return 1;
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}
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/* Currently, support only 4KB block size */
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blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
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if (blocksize != F2FS_BLKSIZE) {
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f2fs_msg(sb, KERN_INFO,
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"Invalid blocksize (%u), supports only 4KB\n",
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blocksize);
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return 1;
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}
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if (le32_to_cpu(raw_super->log_sectorsize) !=
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F2FS_LOG_SECTOR_SIZE) {
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|
f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize");
|
|
return 1;
|
|
}
|
|
if (le32_to_cpu(raw_super->log_sectors_per_block) !=
|
|
F2FS_LOG_SECTORS_PER_BLOCK) {
|
|
f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block");
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static 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);
|
|
|
|
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 (fsmeta >= total)
|
|
return 1;
|
|
|
|
if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG)) {
|
|
f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void init_sb_info(struct f2fs_sb_info *sbi)
|
|
{
|
|
struct f2fs_super_block *raw_super = sbi->raw_super;
|
|
int i;
|
|
|
|
sbi->log_sectors_per_block =
|
|
le32_to_cpu(raw_super->log_sectors_per_block);
|
|
sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
|
|
sbi->blocksize = 1 << sbi->log_blocksize;
|
|
sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
|
|
sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
|
|
sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
|
|
sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
|
|
sbi->total_sections = le32_to_cpu(raw_super->section_count);
|
|
sbi->total_node_count =
|
|
(le32_to_cpu(raw_super->segment_count_nat) / 2)
|
|
* sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
|
|
sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
|
|
sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
|
|
sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
|
|
sbi->cur_victim_sec = NULL_SECNO;
|
|
|
|
for (i = 0; i < NR_COUNT_TYPE; i++)
|
|
atomic_set(&sbi->nr_pages[i], 0);
|
|
}
|
|
|
|
static int validate_superblock(struct super_block *sb,
|
|
struct f2fs_super_block **raw_super,
|
|
struct buffer_head **raw_super_buf, sector_t block)
|
|
{
|
|
const char *super = (block == 0 ? "first" : "second");
|
|
|
|
/* read f2fs raw super block */
|
|
*raw_super_buf = sb_bread(sb, block);
|
|
if (!*raw_super_buf) {
|
|
f2fs_msg(sb, KERN_ERR, "unable to read %s superblock",
|
|
super);
|
|
return -EIO;
|
|
}
|
|
|
|
*raw_super = (struct f2fs_super_block *)
|
|
((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET);
|
|
|
|
/* sanity checking of raw super */
|
|
if (!sanity_check_raw_super(sb, *raw_super))
|
|
return 0;
|
|
|
|
f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem "
|
|
"in %s superblock", super);
|
|
return -EINVAL;
|
|
}
|
|
|
|
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 buffer_head *raw_super_buf;
|
|
struct inode *root;
|
|
long err = -EINVAL;
|
|
int i;
|
|
|
|
/* allocate memory for f2fs-specific super block info */
|
|
sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
|
|
if (!sbi)
|
|
return -ENOMEM;
|
|
|
|
/* set a block size */
|
|
if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) {
|
|
f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
|
|
goto free_sbi;
|
|
}
|
|
|
|
err = validate_superblock(sb, &raw_super, &raw_super_buf, 0);
|
|
if (err) {
|
|
brelse(raw_super_buf);
|
|
/* check secondary superblock when primary failed */
|
|
err = validate_superblock(sb, &raw_super, &raw_super_buf, 1);
|
|
if (err)
|
|
goto free_sb_buf;
|
|
}
|
|
/* init some FS parameters */
|
|
sbi->active_logs = NR_CURSEG_TYPE;
|
|
|
|
set_opt(sbi, BG_GC);
|
|
|
|
#ifdef CONFIG_F2FS_FS_XATTR
|
|
set_opt(sbi, XATTR_USER);
|
|
#endif
|
|
#ifdef CONFIG_F2FS_FS_POSIX_ACL
|
|
set_opt(sbi, POSIX_ACL);
|
|
#endif
|
|
/* parse mount options */
|
|
err = parse_options(sb, sbi, (char *)data);
|
|
if (err)
|
|
goto free_sb_buf;
|
|
|
|
sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
|
|
sb->s_max_links = F2FS_LINK_MAX;
|
|
get_random_bytes(&sbi->s_next_generation, sizeof(u32));
|
|
|
|
sb->s_op = &f2fs_sops;
|
|
sb->s_xattr = f2fs_xattr_handlers;
|
|
sb->s_export_op = &f2fs_export_ops;
|
|
sb->s_magic = F2FS_SUPER_MAGIC;
|
|
sb->s_fs_info = sbi;
|
|
sb->s_time_gran = 1;
|
|
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
|
|
(test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
|
|
memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
|
|
|
|
/* init f2fs-specific super block info */
|
|
sbi->sb = sb;
|
|
sbi->raw_super = raw_super;
|
|
sbi->raw_super_buf = raw_super_buf;
|
|
mutex_init(&sbi->gc_mutex);
|
|
mutex_init(&sbi->writepages);
|
|
mutex_init(&sbi->cp_mutex);
|
|
for (i = 0; i < NR_GLOBAL_LOCKS; i++)
|
|
mutex_init(&sbi->fs_lock[i]);
|
|
mutex_init(&sbi->node_write);
|
|
sbi->por_doing = 0;
|
|
spin_lock_init(&sbi->stat_lock);
|
|
init_rwsem(&sbi->bio_sem);
|
|
init_sb_info(sbi);
|
|
|
|
/* 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_sb_buf;
|
|
}
|
|
|
|
err = get_valid_checkpoint(sbi);
|
|
if (err) {
|
|
f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
|
|
goto free_meta_inode;
|
|
}
|
|
|
|
/* sanity checking of checkpoint */
|
|
err = -EINVAL;
|
|
if (sanity_check_ckpt(sbi)) {
|
|
f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint");
|
|
goto free_cp;
|
|
}
|
|
|
|
sbi->total_valid_node_count =
|
|
le32_to_cpu(sbi->ckpt->valid_node_count);
|
|
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->alloc_valid_block_count = 0;
|
|
INIT_LIST_HEAD(&sbi->dir_inode_list);
|
|
spin_lock_init(&sbi->dir_inode_lock);
|
|
|
|
init_orphan_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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* if there are nt orphan nodes free them */
|
|
err = -EINVAL;
|
|
if (recover_orphan_inodes(sbi))
|
|
goto free_node_inode;
|
|
|
|
/* read root inode and dentry */
|
|
root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
|
|
if (IS_ERR(root)) {
|
|
f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
|
|
err = PTR_ERR(root);
|
|
goto free_node_inode;
|
|
}
|
|
if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size)
|
|
goto free_root_inode;
|
|
|
|
sb->s_root = d_make_root(root); /* allocate root dentry */
|
|
if (!sb->s_root) {
|
|
err = -ENOMEM;
|
|
goto free_root_inode;
|
|
}
|
|
|
|
/* recover fsynced data */
|
|
if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
|
|
err = recover_fsync_data(sbi);
|
|
if (err)
|
|
f2fs_msg(sb, KERN_ERR,
|
|
"Cannot recover all fsync data errno=%ld", err);
|
|
}
|
|
|
|
/* After POR, we can run background GC thread */
|
|
err = start_gc_thread(sbi);
|
|
if (err)
|
|
goto fail;
|
|
|
|
err = f2fs_build_stats(sbi);
|
|
if (err)
|
|
goto fail;
|
|
|
|
if (test_opt(sbi, DISCARD)) {
|
|
struct request_queue *q = bdev_get_queue(sb->s_bdev);
|
|
if (!blk_queue_discard(q))
|
|
f2fs_msg(sb, KERN_WARNING,
|
|
"mounting with \"discard\" option, but "
|
|
"the device does not support discard");
|
|
}
|
|
|
|
return 0;
|
|
fail:
|
|
stop_gc_thread(sbi);
|
|
free_root_inode:
|
|
dput(sb->s_root);
|
|
sb->s_root = NULL;
|
|
free_node_inode:
|
|
iput(sbi->node_inode);
|
|
free_nm:
|
|
destroy_node_manager(sbi);
|
|
free_sm:
|
|
destroy_segment_manager(sbi);
|
|
free_cp:
|
|
kfree(sbi->ckpt);
|
|
free_meta_inode:
|
|
make_bad_inode(sbi->meta_inode);
|
|
iput(sbi->meta_inode);
|
|
free_sb_buf:
|
|
brelse(raw_super_buf);
|
|
free_sbi:
|
|
kfree(sbi);
|
|
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 struct file_system_type f2fs_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "f2fs",
|
|
.mount = f2fs_mount,
|
|
.kill_sb = kill_block_super,
|
|
.fs_flags = FS_REQUIRES_DEV,
|
|
};
|
|
MODULE_ALIAS_FS("f2fs");
|
|
|
|
static int __init init_inodecache(void)
|
|
{
|
|
f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache",
|
|
sizeof(struct f2fs_inode_info), NULL);
|
|
if (f2fs_inode_cachep == NULL)
|
|
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;
|
|
|
|
err = init_inodecache();
|
|
if (err)
|
|
goto fail;
|
|
err = create_node_manager_caches();
|
|
if (err)
|
|
goto fail;
|
|
err = create_gc_caches();
|
|
if (err)
|
|
goto fail;
|
|
err = create_checkpoint_caches();
|
|
if (err)
|
|
goto fail;
|
|
err = register_filesystem(&f2fs_fs_type);
|
|
if (err)
|
|
goto fail;
|
|
f2fs_create_root_stats();
|
|
fail:
|
|
return err;
|
|
}
|
|
|
|
static void __exit exit_f2fs_fs(void)
|
|
{
|
|
f2fs_destroy_root_stats();
|
|
unregister_filesystem(&f2fs_fs_type);
|
|
destroy_checkpoint_caches();
|
|
destroy_gc_caches();
|
|
destroy_node_manager_caches();
|
|
destroy_inodecache();
|
|
}
|
|
|
|
module_init(init_f2fs_fs)
|
|
module_exit(exit_f2fs_fs)
|
|
|
|
MODULE_AUTHOR("Samsung Electronics's Praesto Team");
|
|
MODULE_DESCRIPTION("Flash Friendly File System");
|
|
MODULE_LICENSE("GPL");
|