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gerrit-public.fairphone.software / kernel / msm-5.4 / 0cdd31953967b25c216ddcb630ec9a6bb8a91371 / . / fs / f2fs / super.c
blob: 28b9d605d20f0d3eedf994f9117bad5f8aa08cd1 [file] [log] [blame]
/*
* fs/f2fs/super.c
*
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/statfs.h>
#include <linux/buffer_head.h>
#include <linux/backing-dev.h>
#include <linux/kthread.h>
#include <linux/parser.h>
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/proc_fs.h>
#include <linux/random.h>
#include <linux/exportfs.h>
#include <linux/blkdev.h>
#include <linux/quotaops.h>
#include <linux/f2fs_fs.h>
#include <linux/sysfs.h>
#include <linux/quota.h>
#include "f2fs.h"
#include "node.h"
#include "segment.h"
#include "xattr.h"
#include "gc.h"
#include "trace.h"
#define CREATE_TRACE_POINTS
#include <trace/events/f2fs.h>
static struct kmem_cache *f2fs_inode_cachep;
#ifdef CONFIG_F2FS_FAULT_INJECTION
char *fault_name[FAULT_MAX] = {
[FAULT_KMALLOC] = "kmalloc",
[FAULT_KVMALLOC] = "kvmalloc",
[FAULT_PAGE_ALLOC] = "page alloc",
[FAULT_PAGE_GET] = "page get",
[FAULT_ALLOC_BIO] = "alloc bio",
[FAULT_ALLOC_NID] = "alloc nid",
[FAULT_ORPHAN] = "orphan",
[FAULT_BLOCK] = "no more block",
[FAULT_DIR_DEPTH] = "too big dir depth",
[FAULT_EVICT_INODE] = "evict_inode fail",
[FAULT_TRUNCATE] = "truncate fail",
[FAULT_IO] = "IO error",
[FAULT_CHECKPOINT] = "checkpoint error",
};
static void f2fs_build_fault_attr(struct f2fs_sb_info *sbi,
unsigned int rate)
{
struct f2fs_fault_info *ffi = &sbi->fault_info;
if (rate) {
atomic_set(&ffi->inject_ops, 0);
ffi->inject_rate = rate;
ffi->inject_type = (1 << FAULT_MAX) - 1;
} else {
memset(ffi, 0, sizeof(struct f2fs_fault_info));
}
}
#endif
/* f2fs-wide shrinker description */
static struct shrinker f2fs_shrinker_info = {
.scan_objects = f2fs_shrink_scan,
.count_objects = f2fs_shrink_count,
.seeks = DEFAULT_SEEKS,
};
enum {
Opt_gc_background,
Opt_disable_roll_forward,
Opt_norecovery,
Opt_discard,
Opt_nodiscard,
Opt_noheap,
Opt_heap,
Opt_user_xattr,
Opt_nouser_xattr,
Opt_acl,
Opt_noacl,
Opt_active_logs,
Opt_disable_ext_identify,
Opt_inline_xattr,
Opt_noinline_xattr,
Opt_inline_xattr_size,
Opt_inline_data,
Opt_inline_dentry,
Opt_noinline_dentry,
Opt_flush_merge,
Opt_noflush_merge,
Opt_nobarrier,
Opt_fastboot,
Opt_extent_cache,
Opt_noextent_cache,
Opt_noinline_data,
Opt_data_flush,
Opt_reserve_root,
Opt_resgid,
Opt_resuid,
Opt_mode,
Opt_io_size_bits,
Opt_fault_injection,
Opt_lazytime,
Opt_nolazytime,
Opt_quota,
Opt_noquota,
Opt_usrquota,
Opt_grpquota,
Opt_prjquota,
Opt_usrjquota,
Opt_grpjquota,
Opt_prjjquota,
Opt_offusrjquota,
Opt_offgrpjquota,
Opt_offprjjquota,
Opt_jqfmt_vfsold,
Opt_jqfmt_vfsv0,
Opt_jqfmt_vfsv1,
Opt_whint,
Opt_err,
};
static match_table_t f2fs_tokens = {
{Opt_gc_background, "background_gc=%s"},
{Opt_disable_roll_forward, "disable_roll_forward"},
{Opt_norecovery, "norecovery"},
{Opt_discard, "discard"},
{Opt_nodiscard, "nodiscard"},
{Opt_noheap, "no_heap"},
{Opt_heap, "heap"},
{Opt_user_xattr, "user_xattr"},
{Opt_nouser_xattr, "nouser_xattr"},
{Opt_acl, "acl"},
{Opt_noacl, "noacl"},
{Opt_active_logs, "active_logs=%u"},
{Opt_disable_ext_identify, "disable_ext_identify"},
{Opt_inline_xattr, "inline_xattr"},
{Opt_noinline_xattr, "noinline_xattr"},
{Opt_inline_xattr_size, "inline_xattr_size=%u"},
{Opt_inline_data, "inline_data"},
{Opt_inline_dentry, "inline_dentry"},
{Opt_noinline_dentry, "noinline_dentry"},
{Opt_flush_merge, "flush_merge"},
{Opt_noflush_merge, "noflush_merge"},
{Opt_nobarrier, "nobarrier"},
{Opt_fastboot, "fastboot"},
{Opt_extent_cache, "extent_cache"},
{Opt_noextent_cache, "noextent_cache"},
{Opt_noinline_data, "noinline_data"},
{Opt_data_flush, "data_flush"},
{Opt_reserve_root, "reserve_root=%u"},
{Opt_resgid, "resgid=%u"},
{Opt_resuid, "resuid=%u"},
{Opt_mode, "mode=%s"},
{Opt_io_size_bits, "io_bits=%u"},
{Opt_fault_injection, "fault_injection=%u"},
{Opt_lazytime, "lazytime"},
{Opt_nolazytime, "nolazytime"},
{Opt_quota, "quota"},
{Opt_noquota, "noquota"},
{Opt_usrquota, "usrquota"},
{Opt_grpquota, "grpquota"},
{Opt_prjquota, "prjquota"},
{Opt_usrjquota, "usrjquota=%s"},
{Opt_grpjquota, "grpjquota=%s"},
{Opt_prjjquota, "prjjquota=%s"},
{Opt_offusrjquota, "usrjquota="},
{Opt_offgrpjquota, "grpjquota="},
{Opt_offprjjquota, "prjjquota="},
{Opt_jqfmt_vfsold, "jqfmt=vfsold"},
{Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
{Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
{Opt_whint, "whint_mode=%s"},
{Opt_err, NULL},
};
void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
printk_ratelimited("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
va_end(args);
}
static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
{
block_t limit = (sbi->user_block_count << 1) / 1000;
/* limit is 0.2% */
if (test_opt(sbi, RESERVE_ROOT) && sbi->root_reserved_blocks > limit) {
sbi->root_reserved_blocks = limit;
f2fs_msg(sbi->sb, KERN_INFO,
"Reduce reserved blocks for root = %u",
sbi->root_reserved_blocks);
}
if (!test_opt(sbi, RESERVE_ROOT) &&
(!uid_eq(sbi->s_resuid,
make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
!gid_eq(sbi->s_resgid,
make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
f2fs_msg(sbi->sb, KERN_INFO,
"Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
from_kuid_munged(&init_user_ns, sbi->s_resuid),
from_kgid_munged(&init_user_ns, sbi->s_resgid));
}
static void init_once(void *foo)
{
struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
inode_init_once(&fi->vfs_inode);
}
#ifdef CONFIG_QUOTA
static const char * const quotatypes[] = INITQFNAMES;
#define QTYPE2NAME(t) (quotatypes[t])
static int f2fs_set_qf_name(struct super_block *sb, int qtype,
substring_t *args)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
char *qname;
int ret = -EINVAL;
if (sb_any_quota_loaded(sb) && !sbi->s_qf_names[qtype]) {
f2fs_msg(sb, KERN_ERR,
"Cannot change journaled "
"quota options when quota turned on");
return -EINVAL;
}
if (f2fs_sb_has_quota_ino(sb)) {
f2fs_msg(sb, KERN_INFO,
"QUOTA feature is enabled, so ignore qf_name");
return 0;
}
qname = match_strdup(args);
if (!qname) {
f2fs_msg(sb, KERN_ERR,
"Not enough memory for storing quotafile name");
return -EINVAL;
}
if (sbi->s_qf_names[qtype]) {
if (strcmp(sbi->s_qf_names[qtype], qname) == 0)
ret = 0;
else
f2fs_msg(sb, KERN_ERR,
"%s quota file already specified",
QTYPE2NAME(qtype));
goto errout;
}
if (strchr(qname, '/')) {
f2fs_msg(sb, KERN_ERR,
"quotafile must be on filesystem root");
goto errout;
}
sbi->s_qf_names[qtype] = qname;
set_opt(sbi, QUOTA);
return 0;
errout:
kfree(qname);
return ret;
}
static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
if (sb_any_quota_loaded(sb) && sbi->s_qf_names[qtype]) {
f2fs_msg(sb, KERN_ERR, "Cannot change journaled quota options"
" when quota turned on");
return -EINVAL;
}
kfree(sbi->s_qf_names[qtype]);
sbi->s_qf_names[qtype] = NULL;
return 0;
}
static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
{
/*
* We do the test below only for project quotas. 'usrquota' and
* 'grpquota' mount options are allowed even without quota feature
* to support legacy quotas in quota files.
*/
if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi->sb)) {
f2fs_msg(sbi->sb, KERN_ERR, "Project quota feature not enabled. "
"Cannot enable project quota enforcement.");
return -1;
}
if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA] ||
sbi->s_qf_names[PRJQUOTA]) {
if (test_opt(sbi, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
clear_opt(sbi, USRQUOTA);
if (test_opt(sbi, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA])
clear_opt(sbi, GRPQUOTA);
if (test_opt(sbi, PRJQUOTA) && sbi->s_qf_names[PRJQUOTA])
clear_opt(sbi, PRJQUOTA);
if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
test_opt(sbi, PRJQUOTA)) {
f2fs_msg(sbi->sb, KERN_ERR, "old and new quota "
"format mixing");
return -1;
}
if (!sbi->s_jquota_fmt) {
f2fs_msg(sbi->sb, KERN_ERR, "journaled quota format "
"not specified");
return -1;
}
}
if (f2fs_sb_has_quota_ino(sbi->sb) && sbi->s_jquota_fmt) {
f2fs_msg(sbi->sb, KERN_INFO,
"QUOTA feature is enabled, so ignore jquota_fmt");
sbi->s_jquota_fmt = 0;
}
if (f2fs_sb_has_quota_ino(sbi->sb) && sb_rdonly(sbi->sb)) {
f2fs_msg(sbi->sb, KERN_INFO,
"Filesystem with quota feature cannot be mounted RDWR "
"without CONFIG_QUOTA");
return -1;
}
return 0;
}
#endif
static int parse_options(struct super_block *sb, char *options)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct request_queue *q;
substring_t args[MAX_OPT_ARGS];
char *p, *name;
int arg = 0;
kuid_t uid;
kgid_t gid;
#ifdef CONFIG_QUOTA
int ret;
#endif
if (!options)
return 0;
while ((p = strsep(&options, ",")) != NULL) {
int token;
if (!*p)
continue;
/*
* Initialize args struct so we know whether arg was
* found; some options take optional arguments.
*/
args[0].to = args[0].from = NULL;
token = match_token(p, f2fs_tokens, args);
switch (token) {
case Opt_gc_background:
name = match_strdup(&args[0]);
if (!name)
return -ENOMEM;
if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
set_opt(sbi, BG_GC);
clear_opt(sbi, FORCE_FG_GC);
} else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
clear_opt(sbi, BG_GC);
clear_opt(sbi, FORCE_FG_GC);
} else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
set_opt(sbi, BG_GC);
set_opt(sbi, FORCE_FG_GC);
} else {
kfree(name);
return -EINVAL;
}
kfree(name);
break;
case Opt_disable_roll_forward:
set_opt(sbi, DISABLE_ROLL_FORWARD);
break;
case Opt_norecovery:
/* this option mounts f2fs with ro */
set_opt(sbi, DISABLE_ROLL_FORWARD);
if (!f2fs_readonly(sb))
return -EINVAL;
break;
case Opt_discard:
q = bdev_get_queue(sb->s_bdev);
if (blk_queue_discard(q)) {
set_opt(sbi, DISCARD);
} else if (!f2fs_sb_mounted_blkzoned(sb)) {
f2fs_msg(sb, KERN_WARNING,
"mounting with \"discard\" option, but "
"the device does not support discard");
}
break;
case Opt_nodiscard:
if (f2fs_sb_mounted_blkzoned(sb)) {
f2fs_msg(sb, KERN_WARNING,
"discard is required for zoned block devices");
return -EINVAL;
}
clear_opt(sbi, DISCARD);
break;
case Opt_noheap:
set_opt(sbi, NOHEAP);
break;
case Opt_heap:
clear_opt(sbi, NOHEAP);
break;
#ifdef CONFIG_F2FS_FS_XATTR
case Opt_user_xattr:
set_opt(sbi, XATTR_USER);
break;
case Opt_nouser_xattr:
clear_opt(sbi, XATTR_USER);
break;
case Opt_inline_xattr:
set_opt(sbi, INLINE_XATTR);
break;
case Opt_noinline_xattr:
clear_opt(sbi, INLINE_XATTR);
break;
case Opt_inline_xattr_size:
if (args->from && match_int(args, &arg))
return -EINVAL;
set_opt(sbi, INLINE_XATTR_SIZE);
sbi->inline_xattr_size = arg;
break;
#else
case Opt_user_xattr:
f2fs_msg(sb, KERN_INFO,
"user_xattr options not supported");
break;
case Opt_nouser_xattr:
f2fs_msg(sb, KERN_INFO,
"nouser_xattr options not supported");
break;
case Opt_inline_xattr:
f2fs_msg(sb, KERN_INFO,
"inline_xattr options not supported");
break;
case Opt_noinline_xattr:
f2fs_msg(sb, KERN_INFO,
"noinline_xattr options not supported");
break;
#endif
#ifdef CONFIG_F2FS_FS_POSIX_ACL
case Opt_acl:
set_opt(sbi, POSIX_ACL);
break;
case Opt_noacl:
clear_opt(sbi, POSIX_ACL);
break;
#else
case Opt_acl:
f2fs_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
case Opt_whint:
name = match_strdup(&args[0]);
if (!name)
return -ENOMEM;
if (strlen(name) == 10 &&
!strncmp(name, "user-based", 10)) {
sbi->whint_mode = WHINT_MODE_USER;
} else if (strlen(name) == 3 &&
!strncmp(name, "off", 3)) {
sbi->whint_mode = WHINT_MODE_OFF;
} else {
kfree(name);
return -EINVAL;
}
kfree(name);
break;
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 (!f2fs_sb_has_extra_attr(sb) ||
!f2fs_sb_has_flexible_inline_xattr(sb)) {
f2fs_msg(sb, KERN_ERR,
"extra_attr or flexible_inline_xattr "
"feature is off");
return -EINVAL;
}
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;
}
}
/* Not pass down write hints if the number of active logs is lesser
* than NR_CURSEG_TYPE.
*/
if (sbi->active_logs != NR_CURSEG_TYPE)
sbi->whint_mode = WHINT_MODE_OFF;
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);
if (sbi->whint_mode == WHINT_MODE_USER)
seq_printf(seq, ",whint_mode=%s", "user-based");
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;
sbi->whint_mode = WHINT_MODE_OFF;
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);
int old_whint_mode = sbi->whint_mode;
#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 || sbi->whint_mode != old_whint_mode) {
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->whint_mode = old_whint_mode;
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_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_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
if (!bh)
return -EIO;
err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
brelse(bh);
/* if we are in recovery path, skip writing valid superblock */
if (recover || err)
return err;
/* write current valid superblock */
bh = sb_bread(sbi->sb, sbi->valid_super_block);
if (!bh)
return -EIO;
err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
brelse(bh);
return err;
}
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");