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super.c
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/*
* fs/f2fs/super.c
*
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/statfs.h>
#include <linux/buffer_head.h>
#include <linux/backing-dev.h>
#include <linux/kthread.h>
#include <linux/parser.h>
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/proc_fs.h>
#include <linux/random.h>
#include <linux/exportfs.h>
#include <linux/blkdev.h>
#include <linux/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 = &F2FS_OPTION(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_alloc,
Opt_fsync,
Opt_test_dummy_encryption,
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_alloc, "alloc_mode=%s"},
{Opt_fsync, "fsync_mode=%s"},
{Opt_test_dummy_encryption, "test_dummy_encryption"},
{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) &&
F2FS_OPTION(sbi).root_reserved_blocks > limit) {
F2FS_OPTION(sbi).root_reserved_blocks = limit;
f2fs_msg(sbi->sb, KERN_INFO,
"Reduce reserved blocks for root = %u",
F2FS_OPTION(sbi).root_reserved_blocks);
}
if (!test_opt(sbi, RESERVE_ROOT) &&
(!uid_eq(F2FS_OPTION(sbi).s_resuid,
make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
!gid_eq(F2FS_OPTION(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,
F2FS_OPTION(sbi).s_resuid),
from_kgid_munged(&init_user_ns,
F2FS_OPTION(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) && !F2FS_OPTION(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 (F2FS_OPTION(sbi).s_qf_names[qtype]) {
if (strcmp(F2FS_OPTION(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;
}
F2FS_OPTION(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) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
f2fs_msg(sb, KERN_ERR, "Cannot change journaled quota options"
" when quota turned on");
return -EINVAL;
}
kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
F2FS_OPTION(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 (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
if (test_opt(sbi, USRQUOTA) &&
F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
clear_opt(sbi, USRQUOTA);
if (test_opt(sbi, GRPQUOTA) &&
F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
clear_opt(sbi, GRPQUOTA);
if (test_opt(sbi, PRJQUOTA) &&
F2FS_OPTION(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 (!F2FS_OPTION(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) && F2FS_OPTION(sbi).s_jquota_fmt) {
f2fs_msg(sbi->sb, KERN_INFO,
"QUOTA feature is enabled, so ignore jquota_fmt");
F2FS_OPTION(sbi).s_jquota_fmt = 0;
}
if (f2fs_sb_has_quota_ino(sbi->sb) && f2fs_readonly(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_has_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_has_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);
F2FS_OPTION(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;
F2FS_OPTION(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",
F2FS_OPTION(sbi).root_reserved_blocks);
} else {
F2FS_OPTION(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;
}
F2FS_OPTION(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;
}
F2FS_OPTION(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_has_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;
}
F2FS_OPTION(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:
F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
break;
case Opt_jqfmt_vfsv0:
F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
break;
case Opt_jqfmt_vfsv1:
F2FS_OPTION(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)) {
F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
} else if (strlen(name) == 3 &&
!strncmp(name, "off", 3)) {
F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
} else if (strlen(name) == 8 &&
!strncmp(name, "fs-based", 8)) {
F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
} else {
kfree(name);
return -EINVAL;
}
kfree(name);
break;
case Opt_alloc:
name = match_strdup(&args[0]);
if (!name)
return -ENOMEM;
if (strlen(name) == 7 &&
!strncmp(name, "default", 7)) {
F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
} else if (strlen(name) == 5 &&
!strncmp(name, "reuse", 5)) {
F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
} else {
kfree(name);
return -EINVAL;
}
kfree(name);
break;
case Opt_fsync:
name = match_strdup(&args[0]);
if (!name)
return -ENOMEM;
if (strlen(name) == 5 &&
!strncmp(name, "posix", 5)) {
F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
} else if (strlen(name) == 6 &&
!strncmp(name, "strict", 6)) {
F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
} else if (strlen(name) == 9 &&
!strncmp(name, "nobarrier", 9)) {
F2FS_OPTION(sbi).fsync_mode =
FSYNC_MODE_NOBARRIER;
} else {
kfree(name);
return -EINVAL;
}
kfree(name);
break;
case Opt_test_dummy_encryption:
#ifdef CONFIG_F2FS_FS_ENCRYPTION
if (!f2fs_sb_has_encrypt(sb)) {
f2fs_msg(sb, KERN_ERR, "Encrypt feature is off");
return -EINVAL;
}
F2FS_OPTION(sbi).test_dummy_encryption = true;
f2fs_msg(sb, KERN_INFO,
"Test dummy encryption mode enabled");
#else
f2fs_msg(sb, KERN_INFO,
"Test dummy encryption mount option ignored");
#endif
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 (!F2FS_OPTION(sbi).inline_xattr_size ||
F2FS_OPTION(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 (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
F2FS_OPTION(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);
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->i_gc_rwsem[READ]);
init_rwsem(&fi->i_gc_rwsem[WRITE]);
init_rwsem(&fi->i_mmap_sem);
init_rwsem(&fi->i_xattr_sem);
/* 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))
f2fs_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) ||