diff options
Diffstat (limited to 'patches/linux-3.7-rc6/0101-f2fs-add-super-block-operations.patch')
| -rw-r--r-- | patches/linux-3.7-rc6/0101-f2fs-add-super-block-operations.patch | 612 |
1 files changed, 612 insertions, 0 deletions
diff --git a/patches/linux-3.7-rc6/0101-f2fs-add-super-block-operations.patch b/patches/linux-3.7-rc6/0101-f2fs-add-super-block-operations.patch new file mode 100644 index 0000000..84e9529 --- /dev/null +++ b/patches/linux-3.7-rc6/0101-f2fs-add-super-block-operations.patch @@ -0,0 +1,612 @@ +From b75928193c6e929da5808d20204910c4c7b4eed7 Mon Sep 17 00:00:00 2001 +From: ??? <jaegeuk.kim@samsung.com> +Date: Tue, 23 Oct 2012 02:27:13 +0000 +Subject: [PATCH] f2fs: add super block operations + +This adds the implementation of superblock operations for f2fs, which includes +- init_f2fs_fs/exit_f2fs_fs +- f2fs_mount +- super_operations of f2fs + +Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com> +--- + fs/f2fs/super.c | 590 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 590 insertions(+) + create mode 100644 fs/f2fs/super.c + +diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c +new file mode 100644 +index 0000000..8e608a0 +--- /dev/null ++++ b/fs/f2fs/super.c +@@ -0,0 +1,590 @@ ++/** ++ * fs/f2fs/super.c ++ * ++ * Copyright (c) 2012 Samsung Electronics Co., Ltd. ++ * http://www.samsung.com/ ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++#include <linux/module.h> ++#include <linux/init.h> ++#include <linux/fs.h> ++#include <linux/statfs.h> ++#include <linux/proc_fs.h> ++#include <linux/buffer_head.h> ++#include <linux/backing-dev.h> ++#include <linux/kthread.h> ++#include <linux/parser.h> ++#include <linux/mount.h> ++#include <linux/seq_file.h> ++#include <linux/f2fs_fs.h> ++ ++#include "f2fs.h" ++#include "node.h" ++#include "xattr.h" ++ ++static struct kmem_cache *f2fs_inode_cachep; ++static struct proc_dir_entry *f2fs_proc_root; ++ ++enum { ++ Opt_gc_background_off, ++ Opt_disable_roll_forward, ++ Opt_discard, ++ Opt_noheap, ++ Opt_nouser_xattr, ++ Opt_noacl, ++ Opt_active_logs, ++ Opt_disable_ext_identify, ++ Opt_err, ++}; ++ ++static match_table_t f2fs_tokens = { ++ {Opt_gc_background_off, "background_gc_off"}, ++ {Opt_disable_roll_forward, "disable_roll_forward"}, ++ {Opt_discard, "discard"}, ++ {Opt_noheap, "no_heap"}, ++ {Opt_nouser_xattr, "nouser_xattr"}, ++ {Opt_noacl, "noacl"}, ++ {Opt_active_logs, "active_logs=%u"}, ++ {Opt_disable_ext_identify, "disable_ext_identify"}, ++ {Opt_err, NULL}, ++}; ++ ++static void init_once(void *foo) ++{ ++ struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; ++ ++ memset(fi, 0, sizeof(*fi)); ++ inode_init_once(&fi->vfs_inode); ++} ++ ++static struct inode *f2fs_alloc_inode(struct super_block *sb) ++{ ++ struct f2fs_inode_info *fi; ++ ++ fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO); ++ if (!fi) ++ return NULL; ++ ++ init_once((void *) fi); ++ ++ /* Initilize f2fs-specific inode info */ ++ fi->vfs_inode.i_version = 1; ++ atomic_set(&fi->dirty_dents, 0); ++ fi->current_depth = 1; ++ fi->i_advise = 0; ++ rwlock_init(&fi->ext.ext_lock); ++ ++ set_inode_flag(fi, FI_NEW_INODE); ++ ++ return &fi->vfs_inode; ++} ++ ++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)); ++} ++ ++void f2fs_destroy_inode(struct inode *inode) ++{ ++ call_rcu(&inode->i_rcu, f2fs_i_callback); ++} ++ ++static void f2fs_put_super(struct super_block *sb) ++{ ++ struct f2fs_sb_info *sbi = F2FS_SB(sb); ++ ++#ifdef CONFIG_F2FS_STAT_FS ++ if (sbi->s_proc) { ++ f2fs_stat_exit(sbi); ++ remove_proc_entry(sb->s_id, f2fs_proc_root); ++ } ++#endif ++ stop_gc_thread(sbi); ++ ++ write_checkpoint(sbi, false, true); ++ ++ iput(sbi->node_inode); ++ iput(sbi->meta_inode); ++ ++ /* destroy f2fs internal modules */ ++ destroy_gc_manager(sbi); ++ destroy_node_manager(sbi); ++ destroy_segment_manager(sbi); ++ ++ kfree(sbi->ckpt); ++ ++ sb->s_fs_info = NULL; ++ brelse(sbi->raw_super_buf); ++ kfree(sbi); ++} ++ ++int f2fs_sync_fs(struct super_block *sb, int sync) ++{ ++ struct f2fs_sb_info *sbi = F2FS_SB(sb); ++ int ret = 0; ++ ++ if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) ++ return 0; ++ ++ if (sync) ++ write_checkpoint(sbi, false, false); ++ ++ return ret; ++} ++ ++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); ++ block_t total_count, user_block_count, start_count, ovp_count; ++ ++ total_count = le64_to_cpu(sbi->raw_super->block_count); ++ user_block_count = sbi->user_block_count; ++ start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); ++ ovp_count = sbi->gc_info->overp_segment_count ++ << sbi->log_blocks_per_seg; ++ buf->f_type = F2FS_SUPER_MAGIC; ++ buf->f_bsize = sbi->blocksize; ++ ++ buf->f_blocks = total_count - start_count; ++ buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; ++ buf->f_bavail = user_block_count - valid_user_blocks(sbi); ++ ++ buf->f_files = valid_inode_count(sbi); ++ buf->f_ffree = sbi->total_node_count - valid_node_count(sbi); ++ ++ buf->f_namelen = F2FS_MAX_NAME_LEN; ++ ++ return 0; ++} ++ ++static int f2fs_show_options(struct seq_file *seq, struct dentry *root) ++{ ++ struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); ++ ++ if (test_opt(sbi, BG_GC)) ++ seq_puts(seq, ",background_gc_on"); ++ else ++ seq_puts(seq, ",background_gc_off"); ++ if (test_opt(sbi, DISABLE_ROLL_FORWARD)) ++ seq_puts(seq, ",disable_roll_forward"); ++ if (test_opt(sbi, DISCARD)) ++ seq_puts(seq, ",discard"); ++ if (test_opt(sbi, NOHEAP)) ++ seq_puts(seq, ",no_heap_alloc"); ++#ifdef CONFIG_F2FS_FS_XATTR ++ if (test_opt(sbi, XATTR_USER)) ++ seq_puts(seq, ",user_xattr"); ++ else ++ seq_puts(seq, ",nouser_xattr"); ++#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_indentify"); ++ ++ seq_printf(seq, ",active_logs=%u", sbi->active_logs); ++ ++ return 0; ++} ++ ++static struct super_operations f2fs_sops = { ++ .alloc_inode = f2fs_alloc_inode, ++ .destroy_inode = f2fs_destroy_inode, ++ .write_inode = f2fs_write_inode, ++ .show_options = f2fs_show_options, ++ .evict_inode = f2fs_evict_inode, ++ .put_super = f2fs_put_super, ++ .sync_fs = f2fs_sync_fs, ++ .statfs = f2fs_statfs, ++}; ++ ++static int parse_options(struct f2fs_sb_info *sbi, char *options) ++{ ++ substring_t args[MAX_OPT_ARGS]; ++ char *p; ++ int arg = 0; ++ ++ if (!options) ++ return 0; ++ ++ while ((p = strsep(&options, ",")) != NULL) { ++ int token; ++ if (!*p) ++ continue; ++ /* ++ * Initialize args struct so we know whether arg was ++ * found; some options take optional arguments. ++ */ ++ args[0].to = args[0].from = NULL; ++ token = match_token(p, f2fs_tokens, args); ++ ++ switch (token) { ++ case Opt_gc_background_off: ++ clear_opt(sbi, BG_GC); ++ break; ++ case Opt_disable_roll_forward: ++ set_opt(sbi, DISABLE_ROLL_FORWARD); ++ break; ++ case Opt_discard: ++ set_opt(sbi, DISCARD); ++ break; ++ case Opt_noheap: ++ set_opt(sbi, NOHEAP); ++ break; ++#ifdef CONFIG_F2FS_FS_XATTR ++ case Opt_nouser_xattr: ++ clear_opt(sbi, XATTR_USER); ++ break; ++#else ++ case Opt_nouser_xattr: ++ pr_info("nouser_xattr options not supported\n"); ++ break; ++#endif ++#ifdef CONFIG_F2FS_FS_POSIX_ACL ++ case Opt_noacl: ++ clear_opt(sbi, POSIX_ACL); ++ break; ++#else ++ case Opt_noacl: ++ pr_info("noacl options not supported\n"); ++ break; ++#endif ++ case Opt_active_logs: ++ if (args->from && match_int(args, &arg)) ++ return -EINVAL; ++ if (arg != 2 && arg != 4 && arg != 6) ++ return -EINVAL; ++ sbi->active_logs = arg; ++ break; ++ case Opt_disable_ext_identify: ++ set_opt(sbi, DISABLE_EXT_IDENTIFY); ++ break; ++ default: ++ return -EINVAL; ++ } ++ } ++ return 0; ++} ++ ++static loff_t max_file_size(unsigned bits) ++{ ++ loff_t result = ADDRS_PER_INODE; ++ loff_t leaf_count = ADDRS_PER_BLOCK; ++ ++ result += (leaf_count * 2); ++ ++ leaf_count *= NIDS_PER_BLOCK; ++ result += (leaf_count * 2); ++ ++ leaf_count *= NIDS_PER_BLOCK; ++ result += (leaf_count * 2); ++ ++ result <<= bits; ++ return result; ++} ++ ++static int sanity_check_raw_super(struct f2fs_super_block *raw_super) ++{ ++ unsigned int blocksize; ++ ++ if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) ++ return 1; ++ ++ /* Currently, support only 4KB block size */ ++ blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); ++ if (blocksize != PAGE_CACHE_SIZE) ++ return 1; ++ if (le32_to_cpu(raw_super->log_sectorsize) != 9) ++ return 1; ++ if (le32_to_cpu(raw_super->log_sectors_per_block) != 3) ++ return 1; ++ return 0; ++} ++ ++static int sanity_check_ckpt(struct f2fs_super_block *raw_super, ++ struct f2fs_checkpoint *ckpt) ++{ ++ unsigned int total, fsmeta; ++ ++ 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; ++ 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_sectorsize = le32_to_cpu(raw_super->log_sectorsize); ++ 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); ++ ++ for (i = 0; i < NR_COUNT_TYPE; i++) ++ atomic_set(&sbi->nr_pages[i], 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 buffer_head *raw_super_buf; ++ struct inode *root; ++ 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 temporary block size */ ++ if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) ++ goto free_sbi; ++ ++ /* read f2fs raw super block */ ++ raw_super_buf = sb_bread(sb, F2FS_SUPER_OFFSET); ++ if (!raw_super_buf) ++ goto free_sbi; ++ raw_super = (struct f2fs_super_block *) ((char *)raw_super_buf->b_data); ++ ++ /* 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 */ ++ if (parse_options(sbi, (char *)data)) ++ goto free_sb_buf; ++ ++ /* sanity checking of raw super */ ++ if (sanity_check_raw_super(raw_super)) ++ goto free_sb_buf; ++ ++ sb->s_maxbytes = max_file_size(raw_super->log_blocksize); ++ sb->s_max_links = F2FS_LINK_MAX; ++ ++ sb->s_op = &f2fs_sops; ++ sb->s_xattr = f2fs_xattr_handlers; ++ sb->s_magic = F2FS_SUPER_MAGIC; ++ sb->s_fs_info = sbi; ++ sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | ++ (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); ++ ++ /* 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->write_inode); ++ mutex_init(&sbi->writepages); ++ mutex_init(&sbi->cp_mutex); ++ for (i = 0; i < NR_LOCK_TYPE; i++) ++ mutex_init(&sbi->fs_lock[i]); ++ 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)) ++ goto free_sb_buf; ++ ++ if (get_valid_checkpoint(sbi)) ++ goto free_meta_inode; ++ ++ /* sanity checking of checkpoint */ ++ if (sanity_check_ckpt(raw_super, sbi->ckpt)) ++ 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 super block */ ++ if (!sb_set_blocksize(sb, sbi->blocksize)) ++ goto free_cp; ++ ++ init_orphan_info(sbi); ++ ++ /* setup f2fs internal modules */ ++ if (build_segment_manager(sbi)) ++ goto free_sm; ++ if (build_node_manager(sbi)) ++ goto free_nm; ++ if (build_gc_manager(sbi)) ++ goto free_gc; ++ ++ /* get an inode for node space */ ++ sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); ++ if (IS_ERR(sbi->node_inode)) ++ goto free_gc; ++ ++ /* if there are nt orphan nodes free them */ ++ 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)) ++ 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) ++ goto free_root_inode; ++ ++ /* recover fsynced data */ ++ if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) ++ recover_fsync_data(sbi); ++ ++ /* After POR, we can run background GC thread */ ++ if (start_gc_thread(sbi)) ++ goto fail; ++ ++#ifdef CONFIG_F2FS_STAT_FS ++ if (f2fs_proc_root) { ++ sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); ++ if (f2fs_stat_init(sbi)) ++ goto fail; ++ } ++#endif ++ return 0; ++fail: ++ stop_gc_thread(sbi); ++free_root_inode: ++ make_bad_inode(root); ++ iput(root); ++free_node_inode: ++ make_bad_inode(sbi->node_inode); ++ iput(sbi->node_inode); ++free_gc: ++ destroy_gc_manager(sbi); ++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 -EINVAL; ++} ++ ++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, ++}; ++ ++static int 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) ++{ ++ if (init_inodecache()) ++ goto fail; ++ if (create_node_manager_caches()) ++ goto fail; ++ if (create_gc_caches()) ++ goto fail; ++ if (create_checkpoint_caches()) ++ goto fail; ++ if (register_filesystem(&f2fs_fs_type)) ++ return -EBUSY; ++ ++ f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); ++ return 0; ++fail: ++ return -ENOMEM; ++} ++ ++static void __exit exit_f2fs_fs(void) ++{ ++ remove_proc_entry("fs/f2fs", NULL); ++ 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"); |