[PATCH 1/3] f2fs: use kvmalloc, if kmalloc is failed

From: Jaegeuk Kim
Date: Fri Dec 14 2018 - 00:01:35 EST

One report says memalloc failure during mount.

(unwind_backtrace) from [<c010cd4c>] (show_stack+0x10/0x14)
(show_stack) from [<c049c6b8>] (dump_stack+0x8c/0xa0)
(dump_stack) from [<c024fcf0>] (warn_alloc+0xc4/0x160)
(warn_alloc) from [<c0250218>] (__alloc_pages_nodemask+0x3f4/0x10d0)
(__alloc_pages_nodemask) from [<c0270450>] (kmalloc_order_trace+0x2c/0x120)
(kmalloc_order_trace) from [<c03fa748>] (build_node_manager+0x35c/0x688)
(build_node_manager) from [<c03de494>] (f2fs_fill_super+0xf0c/0x16cc)
(f2fs_fill_super) from [<c02a5864>] (mount_bdev+0x15c/0x188)
(mount_bdev) from [<c03da624>] (f2fs_mount+0x18/0x20)
(f2fs_mount) from [<c02a68b8>] (mount_fs+0x158/0x19c)
(mount_fs) from [<c02c3c9c>] (vfs_kern_mount+0x78/0x134)
(vfs_kern_mount) from [<c02c76ac>] (do_mount+0x474/0xca4)
(do_mount) from [<c02c8264>] (SyS_mount+0x94/0xbc)
(SyS_mount) from [<c0108180>] (ret_fast_syscall+0x0/0x48)

Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
fs/f2fs/acl.c | 6 ++--
fs/f2fs/checkpoint.c | 2 +-
fs/f2fs/data.c | 2 +-
fs/f2fs/debug.c | 2 +-
fs/f2fs/f2fs.h | 10 +++++--
fs/f2fs/gc.c | 4 +--
fs/f2fs/inline.c | 4 +--
fs/f2fs/namei.c | 2 +-
fs/f2fs/node.c | 10 +++----
fs/f2fs/segment.c | 36 +++++++++++------------
fs/f2fs/super.c | 68 ++++++++++++++++++++++----------------------
11 files changed, 76 insertions(+), 70 deletions(-)

diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c
index 22f0d17cde43..63e599524085 100644
--- a/fs/f2fs/acl.c
+++ b/fs/f2fs/acl.c
@@ -160,7 +160,7 @@ static void *f2fs_acl_to_disk(struct f2fs_sb_info *sbi,
return (void *)f2fs_acl;

fail:
- kfree(f2fs_acl);
+ kvfree(f2fs_acl);
return ERR_PTR(-EINVAL);
}

@@ -190,7 +190,7 @@ static struct posix_acl *__f2fs_get_acl(struct inode *inode, int type,
acl = NULL;
else
acl = ERR_PTR(retval);
- kfree(value);
+ kvfree(value);

return acl;
}
@@ -240,7 +240,7 @@ static int __f2fs_set_acl(struct inode *inode, int type,

error = f2fs_setxattr(inode, name_index, "", value, size, ipage, 0);

- kfree(value);
+ kvfree(value);
if (!error)
set_cached_acl(inode, type, acl);

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 3a25cf22d732..5cba6a8ee55c 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -911,7 +911,7 @@ int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
f2fs_put_page(cp1, 1);
f2fs_put_page(cp2, 1);
fail_no_cp:
- kfree(sbi->ckpt);
+ kvfree(sbi->ckpt);
return -EINVAL;
}

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index fd3a1e5ab6d9..59d86f692c84 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -2573,7 +2573,7 @@ static void f2fs_dio_end_io(struct bio *bio)
bio->bi_private = dio->orig_private;
bio->bi_end_io = dio->orig_end_io;

- kfree(dio);
+ kvfree(dio);

bio_endio(bio);
}
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 1f1230f690ec..11d4448e8e09 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -503,7 +503,7 @@ void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
list_del(&si->stat_list);
mutex_unlock(&f2fs_stat_mutex);

- kfree(si);
+ kvfree(si);
}

int __init f2fs_create_root_stats(void)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 7cec897146a3..81bd9a2bf22b 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1631,7 +1631,7 @@ static inline void disable_nat_bits(struct f2fs_sb_info *sbi, bool lock)
if (lock)
spin_lock_irqsave(&sbi->cp_lock, flags);
__clear_ckpt_flags(F2FS_CKPT(sbi), CP_NAT_BITS_FLAG);
- kfree(NM_I(sbi)->nat_bits);
+ kvfree(NM_I(sbi)->nat_bits);
NM_I(sbi)->nat_bits = NULL;
if (lock)
spin_unlock_irqrestore(&sbi->cp_lock, flags);
@@ -2705,12 +2705,18 @@ static inline bool f2fs_may_extent_tree(struct inode *inode)
static inline void *f2fs_kmalloc(struct f2fs_sb_info *sbi,
size_t size, gfp_t flags)
{
+ void *ret;
+
if (time_to_inject(sbi, FAULT_KMALLOC)) {
f2fs_show_injection_info(FAULT_KMALLOC);
return NULL;
}

- return kmalloc(size, flags);
+ ret = kmalloc(size, flags);
+ if (ret)
+ return ret;
+
+ return kvmalloc(size, flags);
}

static inline void *f2fs_kzalloc(struct f2fs_sb_info *sbi,
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 71462f2e47d4..20ca8141a720 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -142,7 +142,7 @@ int f2fs_start_gc_thread(struct f2fs_sb_info *sbi)
"f2fs_gc-%u:%u", MAJOR(dev), MINOR(dev));
if (IS_ERR(gc_th->f2fs_gc_task)) {
err = PTR_ERR(gc_th->f2fs_gc_task);
- kfree(gc_th);
+ kvfree(gc_th);
sbi->gc_thread = NULL;
}
out:
@@ -155,7 +155,7 @@ void f2fs_stop_gc_thread(struct f2fs_sb_info *sbi)
if (!gc_th)
return;
kthread_stop(gc_th->f2fs_gc_task);
- kfree(gc_th);
+ kvfree(gc_th);
sbi->gc_thread = NULL;
}

diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 7b0cff7e6051..0113bebe2ea8 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -501,7 +501,7 @@ static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,

stat_dec_inline_dir(dir);
clear_inode_flag(dir, FI_INLINE_DENTRY);
- kfree(backup_dentry);
+ kvfree(backup_dentry);
return 0;
recover:
lock_page(ipage);
@@ -512,7 +512,7 @@ static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
set_page_dirty(ipage);
f2fs_put_page(ipage, 1);

- kfree(backup_dentry);
+ kvfree(backup_dentry);
return err;
}

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 2d5626939893..62d9829f3a6a 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -635,7 +635,7 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
f2fs_handle_failed_inode(inode);
out_free_encrypted_link:
if (disk_link.name != (unsigned char *)symname)
- kfree(disk_link.name);
+ kvfree(disk_link.name);
return err;
}

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index a2273340991f..a08cb2e46547 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -3115,17 +3115,17 @@ void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi)

for (i = 0; i < nm_i->nat_blocks; i++)
kvfree(nm_i->free_nid_bitmap[i]);
- kfree(nm_i->free_nid_bitmap);
+ kvfree(nm_i->free_nid_bitmap);
}
kvfree(nm_i->free_nid_count);

- kfree(nm_i->nat_bitmap);
- kfree(nm_i->nat_bits);
+ kvfree(nm_i->nat_bitmap);
+ kvfree(nm_i->nat_bits);
#ifdef CONFIG_F2FS_CHECK_FS
- kfree(nm_i->nat_bitmap_mir);
+ kvfree(nm_i->nat_bitmap_mir);
#endif
sbi->nm_info = NULL;
- kfree(nm_i);
+ kvfree(nm_i);
}

int __init f2fs_create_node_manager_caches(void)
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 204d31e58967..98649d304a2f 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -705,7 +705,7 @@ int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
"f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
if (IS_ERR(fcc->f2fs_issue_flush)) {
err = PTR_ERR(fcc->f2fs_issue_flush);
- kfree(fcc);
+ kvfree(fcc);
SM_I(sbi)->fcc_info = NULL;
return err;
}
@@ -724,7 +724,7 @@ void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
kthread_stop(flush_thread);
}
if (free) {
- kfree(fcc);
+ kvfree(fcc);
SM_I(sbi)->fcc_info = NULL;
}
}
@@ -2012,7 +2012,7 @@ static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
"f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev));
if (IS_ERR(dcc->f2fs_issue_discard)) {
err = PTR_ERR(dcc->f2fs_issue_discard);
- kfree(dcc);
+ kvfree(dcc);
SM_I(sbi)->dcc_info = NULL;
return err;
}
@@ -2029,7 +2029,7 @@ static void destroy_discard_cmd_control(struct f2fs_sb_info *sbi)

f2fs_stop_discard_thread(sbi);

- kfree(dcc);
+ kvfree(dcc);
SM_I(sbi)->dcc_info = NULL;
}

@@ -4316,7 +4316,7 @@ static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)

destroy_victim_secmap(sbi);
SM_I(sbi)->dirty_info = NULL;
- kfree(dirty_i);
+ kvfree(dirty_i);
}

static void destroy_curseg(struct f2fs_sb_info *sbi)
@@ -4328,10 +4328,10 @@ static void destroy_curseg(struct f2fs_sb_info *sbi)
return;
SM_I(sbi)->curseg_array = NULL;
for (i = 0; i < NR_CURSEG_TYPE; i++) {
- kfree(array[i].sum_blk);
- kfree(array[i].journal);
+ kvfree(array[i].sum_blk);
+ kvfree(array[i].journal);
}
- kfree(array);
+ kvfree(array);
}

static void destroy_free_segmap(struct f2fs_sb_info *sbi)
@@ -4342,7 +4342,7 @@ static void destroy_free_segmap(struct f2fs_sb_info *sbi)
SM_I(sbi)->free_info = NULL;
kvfree(free_i->free_segmap);
kvfree(free_i->free_secmap);
- kfree(free_i);
+ kvfree(free_i);
}

static void destroy_sit_info(struct f2fs_sb_info *sbi)
@@ -4355,26 +4355,26 @@ static void destroy_sit_info(struct f2fs_sb_info *sbi)

if (sit_i->sentries) {
for (start = 0; start < MAIN_SEGS(sbi); start++) {
- kfree(sit_i->sentries[start].cur_valid_map);
+ kvfree(sit_i->sentries[start].cur_valid_map);
#ifdef CONFIG_F2FS_CHECK_FS
- kfree(sit_i->sentries[start].cur_valid_map_mir);
+ kvfree(sit_i->sentries[start].cur_valid_map_mir);
#endif
- kfree(sit_i->sentries[start].ckpt_valid_map);
- kfree(sit_i->sentries[start].discard_map);
+ kvfree(sit_i->sentries[start].ckpt_valid_map);
+ kvfree(sit_i->sentries[start].discard_map);
}
}
- kfree(sit_i->tmp_map);
+ kvfree(sit_i->tmp_map);

kvfree(sit_i->sentries);
kvfree(sit_i->sec_entries);
kvfree(sit_i->dirty_sentries_bitmap);

SM_I(sbi)->sit_info = NULL;
- kfree(sit_i->sit_bitmap);
+ kvfree(sit_i->sit_bitmap);
#ifdef CONFIG_F2FS_CHECK_FS
- kfree(sit_i->sit_bitmap_mir);
+ kvfree(sit_i->sit_bitmap_mir);
#endif
- kfree(sit_i);
+ kvfree(sit_i);
}

void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi)
@@ -4390,7 +4390,7 @@ void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi)
destroy_free_segmap(sbi);
destroy_sit_info(sbi);
sbi->sm_info = NULL;
- kfree(sm_info);
+ kvfree(sm_info);
}

int __init f2fs_create_segment_manager_caches(void)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index e184ad4e4e90..b79677639108 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -289,7 +289,7 @@ static int f2fs_set_qf_name(struct super_block *sb, int qtype,
set_opt(sbi, QUOTA);
return 0;
errout:
- kfree(qname);
+ kvfree(qname);
return ret;
}

@@ -302,7 +302,7 @@ static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
" when quota turned on");
return -EINVAL;
}
- kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
+ kvfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
return 0;
}
@@ -399,10 +399,10 @@ static int parse_options(struct super_block *sb, char *options)
set_opt(sbi, BG_GC);
set_opt(sbi, FORCE_FG_GC);
} else {
- kfree(name);
+ kvfree(name);
return -EINVAL;
}
- kfree(name);
+ kvfree(name);
break;
case Opt_disable_roll_forward:
set_opt(sbi, DISABLE_ROLL_FORWARD);
@@ -570,7 +570,7 @@ static int parse_options(struct super_block *sb, char *options)
f2fs_msg(sb, KERN_WARNING,
"adaptive mode is not allowed with "
"zoned block device feature");
- kfree(name);
+ kvfree(name);
return -EINVAL;
}
set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
@@ -578,10 +578,10 @@ static int parse_options(struct super_block *sb, char *options)
!strncmp(name, "lfs", 3)) {
set_opt_mode(sbi, F2FS_MOUNT_LFS);
} else {
- kfree(name);
+ kvfree(name);
return -EINVAL;
}
- kfree(name);
+ kvfree(name);
break;
case Opt_io_size_bits:
if (args->from && match_int(args, &arg))
@@ -714,10 +714,10 @@ static int parse_options(struct super_block *sb, char *options)
!strncmp(name, "fs-based", 8)) {
F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
} else {
- kfree(name);
+ kvfree(name);
return -EINVAL;
}
- kfree(name);
+ kvfree(name);
break;
case Opt_alloc:
name = match_strdup(&args[0]);
@@ -731,10 +731,10 @@ static int parse_options(struct super_block *sb, char *options)
!strncmp(name, "reuse", 5)) {
F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
} else {
- kfree(name);
+ kvfree(name);
return -EINVAL;
}
- kfree(name);
+ kvfree(name);
break;
case Opt_fsync:
name = match_strdup(&args[0]);
@@ -751,10 +751,10 @@ static int parse_options(struct super_block *sb, char *options)
F2FS_OPTION(sbi).fsync_mode =
FSYNC_MODE_NOBARRIER;
} else {
- kfree(name);
+ kvfree(name);
return -EINVAL;
}
- kfree(name);
+ kvfree(name);
break;
case Opt_test_dummy_encryption:
#ifdef CONFIG_F2FS_FS_ENCRYPTION
@@ -783,10 +783,10 @@ static int parse_options(struct super_block *sb, char *options)
!strncmp(name, "disable", 7)) {
set_opt(sbi, DISABLE_CHECKPOINT);
} else {
- kfree(name);
+ kvfree(name);
return -EINVAL;
}
- kfree(name);
+ kvfree(name);
break;
default:
f2fs_msg(sb, KERN_ERR,
@@ -1017,10 +1017,10 @@ static void destroy_device_list(struct f2fs_sb_info *sbi)
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);
+ kvfree(FDEV(i).blkz_type);
#endif
}
- kfree(sbi->devs);
+ kvfree(sbi->devs);
}

static void f2fs_put_super(struct super_block *sb)
@@ -1084,25 +1084,25 @@ static void f2fs_put_super(struct super_block *sb)
f2fs_destroy_node_manager(sbi);
f2fs_destroy_segment_manager(sbi);

- kfree(sbi->ckpt);
+ kvfree(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);
+ kvfree(sbi->raw_super);

destroy_device_list(sbi);
mempool_destroy(sbi->write_io_dummy);
#ifdef CONFIG_QUOTA
for (i = 0; i < MAXQUOTAS; i++)
- kfree(F2FS_OPTION(sbi).s_qf_names[i]);
+ kvfree(F2FS_OPTION(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);
+ kvfree(sbi->write_io[i]);
+ kvfree(sbi);
}

int f2fs_sync_fs(struct super_block *sb, int sync)
@@ -1531,7 +1531,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
GFP_KERNEL);
if (!org_mount_opt.s_qf_names[i]) {
for (j = 0; j < i; j++)
- kfree(org_mount_opt.s_qf_names[j]);
+ kvfree(org_mount_opt.s_qf_names[j]);
return -ENOMEM;
}
} else {
@@ -1651,7 +1651,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
#ifdef CONFIG_QUOTA
/* Release old quota file names */
for (i = 0; i < MAXQUOTAS; i++)
- kfree(org_mount_opt.s_qf_names[i]);
+ kvfree(org_mount_opt.s_qf_names[i]);
#endif
/* Update the POSIXACL Flag */
sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
@@ -1672,7 +1672,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
#ifdef CONFIG_QUOTA
F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
for (i = 0; i < MAXQUOTAS; i++) {
- kfree(F2FS_OPTION(sbi).s_qf_names[i]);
+ kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
}
#endif
@@ -2800,7 +2800,7 @@ static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
}
}

- kfree(zones);
+ kvfree(zones);

return err;
}
@@ -2860,7 +2860,7 @@ static int read_raw_super_block(struct f2fs_sb_info *sbi,

/* No valid superblock */
if (!*raw_super)
- kfree(super);
+ kvfree(super);
else
err = 0;

@@ -3369,7 +3369,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
if (err)
goto free_meta;
}
- kfree(options);
+ kvfree(options);

/* recover broken superblock */
if (recovery) {
@@ -3418,7 +3418,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
f2fs_destroy_segment_manager(sbi);
free_devices:
destroy_device_list(sbi);
- kfree(sbi->ckpt);
+ kvfree(sbi->ckpt);
free_meta_inode:
make_bad_inode(sbi->meta_inode);
iput(sbi->meta_inode);
@@ -3428,19 +3428,19 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
destroy_percpu_info(sbi);
free_bio_info:
for (i = 0; i < NR_PAGE_TYPE; i++)
- kfree(sbi->write_io[i]);
+ kvfree(sbi->write_io[i]);
free_options:
#ifdef CONFIG_QUOTA
for (i = 0; i < MAXQUOTAS; i++)
- kfree(F2FS_OPTION(sbi).s_qf_names[i]);
+ kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
#endif
- kfree(options);
+ kvfree(options);
free_sb_buf:
- kfree(raw_super);
+ kvfree(raw_super);
free_sbi:
if (sbi->s_chksum_driver)
crypto_free_shash(sbi->s_chksum_driver);
- kfree(sbi);
+ kvfree(sbi);

/* give only one another chance */
if (retry) {
--
2.19.0.605.g01d371f741-goog