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Message-ID: <20201120103457.82995-1-yuchao0@huawei.com>
Date: Fri, 20 Nov 2020 18:34:57 +0800
From: Chao Yu <yuchao0@...wei.com>
To: <jaegeuk@...nel.org>
CC: <linux-f2fs-devel@...ts.sourceforge.net>,
<linux-kernel@...r.kernel.org>, <chao@...nel.org>,
Chao Yu <yuchao0@...wei.com>
Subject: [PATCH RFC] f2fs: compress: add compress_inode to cache compressed blocks
Support to use address space of inner inode to cache compressed block,
in order to improve cache hit ratio of random read.
Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
Documentation/filesystems/f2fs.rst | 3 +
fs/f2fs/compress.c | 150 ++++++++++++++++++++++++++---
fs/f2fs/data.c | 29 +++++-
fs/f2fs/debug.c | 13 +++
fs/f2fs/f2fs.h | 31 +++++-
fs/f2fs/gc.c | 1 +
fs/f2fs/inode.c | 16 ++-
fs/f2fs/segment.c | 6 +-
fs/f2fs/super.c | 19 +++-
include/linux/f2fs_fs.h | 1 +
10 files changed, 249 insertions(+), 20 deletions(-)
diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst
index 985ae7d35066..8830a11a11be 100644
--- a/Documentation/filesystems/f2fs.rst
+++ b/Documentation/filesystems/f2fs.rst
@@ -261,6 +261,9 @@ compress_extension=%s Support adding specified extension, so that f2fs can enab
Note that, there is one reserved special extension '*', it
can be set to enable compression for all files.
compress_chksum Support verifying chksum of raw data in compressed cluster.
+compress_cache Support to use address space of inner inode to cache
+ compressed block, in order to improve cache hit ratio of
+ random read.
inlinecrypt When possible, encrypt/decrypt the contents of encrypted
files using the blk-crypto framework rather than
filesystem-layer encryption. This allows the use of
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 2509348ced2b..244594ea83d1 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -15,6 +15,7 @@
#include "f2fs.h"
#include "node.h"
+#include "segment.h"
#include <trace/events/f2fs.h>
static struct kmem_cache *cic_entry_slab;
@@ -726,11 +727,8 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
return ret;
}
-void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
+void f2fs_do_decompress_pages(struct decompress_io_ctx *dic, bool verity)
{
- struct decompress_io_ctx *dic =
- (struct decompress_io_ctx *)page_private(page);
- struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode);
struct f2fs_inode_info *fi= F2FS_I(dic->inode);
struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode);
const struct f2fs_compress_ops *cops =
@@ -738,14 +736,6 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
int ret;
int i;
- dec_page_count(sbi, F2FS_RD_DATA);
-
- if (bio->bi_status || PageError(page))
- dic->failed = true;
-
- if (atomic_dec_return(&dic->pending_pages))
- return;
-
trace_f2fs_decompress_pages_start(dic->inode, dic->cluster_idx,
dic->cluster_size, fi->i_compress_algorithm);
@@ -839,6 +829,30 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
f2fs_free_dic(dic);
}
+void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
+ block_t blkaddr);
+void f2fs_decompress_pages(struct bio *bio, struct page *page,
+ bool verity, unsigned int ofs)
+{
+ struct decompress_io_ctx *dic =
+ (struct decompress_io_ctx *)page_private(page);
+ struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode);
+ block_t blkaddr;
+
+ dec_page_count(sbi, F2FS_RD_DATA);
+
+ if (bio->bi_status || PageError(page))
+ dic->failed = true;
+
+ blkaddr = SECTOR_TO_BLOCK(bio->bi_iter.bi_sector) + ofs;
+ f2fs_cache_compressed_page(sbi, page, blkaddr);
+
+ if (atomic_dec_return(&dic->pending_pages))
+ return;
+
+ f2fs_do_decompress_pages(dic, verity);
+}
+
static bool is_page_in_cluster(struct compress_ctx *cc, pgoff_t index)
{
if (cc->cluster_idx == NULL_CLUSTER)
@@ -1609,6 +1623,118 @@ void f2fs_decompress_end_io(struct page **rpages,
}
}
+const struct address_space_operations f2fs_compress_aops = {
+ .releasepage = f2fs_release_page,
+ .invalidatepage = f2fs_invalidate_page,
+};
+
+struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi)
+{
+ return sbi->compress_inode->i_mapping;
+}
+
+void invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr)
+{
+ if (!sbi->compress_inode)
+ return;
+ invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr);
+}
+
+void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
+ block_t blkaddr)
+{
+ struct page *cpage;
+ int ret;
+ struct sysinfo si;
+ unsigned long free_ram, avail_ram;
+
+ if (!test_opt(sbi, COMPRESS_CACHE))
+ return;
+
+ si_meminfo(&si);
+ free_ram = si.freeram;
+ avail_ram = si.totalram - si.totalhigh;
+
+ /* free memory is lower than watermark, deny caching compress page */
+ if (free_ram <= sbi->compress_watermark / 100 * avail_ram)
+ return;
+
+ /* cached page count exceed threshold, deny caching compress page */
+ if (COMPRESS_MAPPING(sbi)->nrpages >=
+ free_ram / 100 * sbi->compress_percent)
+ return;
+
+ cpage = find_get_page(COMPRESS_MAPPING(sbi), blkaddr);
+ if (cpage) {
+ f2fs_put_page(cpage, 0);
+ return;
+ }
+
+ cpage = alloc_page(__GFP_IO);
+ if (!cpage)
+ return;
+
+ ret = add_to_page_cache_lru(cpage, COMPRESS_MAPPING(sbi),
+ blkaddr, GFP_NOFS);
+ if (ret) {
+ f2fs_put_page(cpage, 0);
+ return;
+ }
+
+ memcpy(page_address(cpage), page_address(page), PAGE_SIZE);
+ SetPageUptodate(cpage);
+ f2fs_put_page(cpage, 1);
+}
+
+void f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
+ block_t blkaddr)
+{
+ struct page *cpage;
+
+ if (!test_opt(sbi, COMPRESS_CACHE))
+ return;
+
+ cpage = f2fs_pagecache_get_page(COMPRESS_MAPPING(sbi),
+ blkaddr, FGP_LOCK | FGP_NOWAIT, GFP_NOFS);
+ if (cpage) {
+ if (PageUptodate(cpage)) {
+ atomic_inc(&sbi->compress_page_hit);
+ memcpy(page_address(page),
+ page_address(cpage), PAGE_SIZE);
+ SetPageUptodate(page);
+ }
+ f2fs_put_page(cpage, 1);
+ }
+}
+
+int f2fs_init_compress_inode(struct f2fs_sb_info *sbi)
+{
+ struct inode *inode;
+
+ if (!test_opt(sbi, COMPRESS_CACHE))
+ return 0;
+
+ inode = f2fs_iget(sbi->sb, F2FS_COMPRESS_INO(sbi));
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+ sbi->compress_inode = inode;
+
+ sbi->compress_percent = COMPRESS_PERCENT;
+ sbi->compress_watermark = COMPRESS_WATERMARK;
+
+ atomic_set(&sbi->compress_page_hit, 0);
+
+ return 0;
+}
+
+void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi)
+{
+ if (!sbi->compress_inode)
+ return;
+ iput(sbi->compress_inode);
+ sbi->compress_inode = NULL;
+}
+
int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi)
{
dev_t dev = sbi->sb->s_bdev->bd_dev;
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index be4da52604ed..26b4ce15be3f 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -133,17 +133,21 @@ static void __read_end_io(struct bio *bio, bool compr, bool verity)
struct page *page;
struct bio_vec *bv;
struct bvec_iter_all iter_all;
+ unsigned int ofs = 0;
bio_for_each_segment_all(bv, bio, iter_all) {
page = bv->bv_page;
#ifdef CONFIG_F2FS_FS_COMPRESSION
if (compr && f2fs_is_compressed_page(page)) {
- f2fs_decompress_pages(bio, page, verity);
+ f2fs_decompress_pages(bio, page, verity, ofs);
+ ofs++;
continue;
}
- if (verity)
+ if (verity) {
+ ofs++;
continue;
+ }
#endif
/* PG_error was set if any post_read step failed */
@@ -156,6 +160,7 @@ static void __read_end_io(struct bio *bio, bool compr, bool verity)
}
dec_page_count(F2FS_P_SB(page), __read_io_type(page));
unlock_page(page);
+ ofs++;
}
}
@@ -1417,9 +1422,11 @@ static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
old_blkaddr = dn->data_blkaddr;
f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
&sum, seg_type, NULL);
- if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
+ if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) {
invalidate_mapping_pages(META_MAPPING(sbi),
old_blkaddr, old_blkaddr);
+ invalidate_compress_page(sbi, old_blkaddr);
+ }
f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
/*
@@ -2253,6 +2260,22 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
blkaddr = data_blkaddr(dn.inode, dn.node_page,
dn.ofs_in_node + i + 1);
+ f2fs_load_compressed_page(sbi, page, blkaddr);
+ if (PageUptodate(page)) {
+ if (!atomic_dec_return(&dic->pending_pages)) {
+ bool verity =
+ f2fs_need_verity(inode, start_idx);
+
+ f2fs_do_decompress_pages(dic, verity);
+ if (verity) {
+ f2fs_verify_pages(dic->rpages,
+ dic->cluster_size);
+ f2fs_free_dic(dic);
+ }
+ }
+ continue;
+ }
+
if (bio && (!page_is_mergeable(sbi, bio,
*last_block_in_bio, blkaddr) ||
!f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) {
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index a8357fd4f5fa..7d76eb5839b4 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -145,6 +145,12 @@ static void update_general_status(struct f2fs_sb_info *sbi)
si->node_pages = NODE_MAPPING(sbi)->nrpages;
if (sbi->meta_inode)
si->meta_pages = META_MAPPING(sbi)->nrpages;
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ if (sbi->compress_inode) {
+ si->compress_pages = COMPRESS_MAPPING(sbi)->nrpages;
+ si->compress_page_hit = atomic_read(&sbi->compress_page_hit);
+ }
+#endif
si->nats = NM_I(sbi)->nat_cnt;
si->dirty_nats = NM_I(sbi)->dirty_nat_cnt;
si->sits = MAIN_SEGS(sbi);
@@ -298,6 +304,12 @@ static void update_mem_info(struct f2fs_sb_info *sbi)
unsigned npages = META_MAPPING(sbi)->nrpages;
si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
}
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ if (sbi->compress_inode) {
+ unsigned npages = COMPRESS_MAPPING(sbi)->nrpages;
+ si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
+ }
+#endif
}
static int stat_show(struct seq_file *s, void *v)
@@ -460,6 +472,7 @@ static int stat_show(struct seq_file *s, void *v)
"volatile IO: %4d (Max. %4d)\n",
si->inmem_pages, si->aw_cnt, si->max_aw_cnt,
si->vw_cnt, si->max_vw_cnt);
+ seq_printf(s, " - compress: %4d, hit:%8d\n", si->compress_pages, si->compress_page_hit);
seq_printf(s, " - nodes: %4d in %4d\n",
si->ndirty_node, si->node_pages);
seq_printf(s, " - dents: %4d in dirs:%4d (%4d)\n",
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 7c2e7e4738e5..4f2766f3d2c1 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -99,6 +99,7 @@ extern const char *f2fs_fault_name[FAULT_MAX];
#define F2FS_MOUNT_DISABLE_CHECKPOINT 0x02000000
#define F2FS_MOUNT_NORECOVERY 0x04000000
#define F2FS_MOUNT_ATGC 0x08000000
+#define F2FS_MOUNT_COMPRESS_CACHE 0x10000000
#define F2FS_OPTION(sbi) ((sbi)->mount_opt)
#define clear_opt(sbi, option) (F2FS_OPTION(sbi).opt &= ~F2FS_MOUNT_##option)
@@ -1278,6 +1279,9 @@ enum compress_flag {
COMPRESS_MAX_FLAG,
};
+#define COMPRESS_WATERMARK 20
+#define COMPRESS_PERCENT 20
+
#define COMPRESS_DATA_RESERVED_SIZE 4
struct compress_data {
__le32 clen; /* compressed data size */
@@ -1549,6 +1553,11 @@ struct f2fs_sb_info {
#ifdef CONFIG_F2FS_FS_COMPRESSION
struct kmem_cache *page_array_slab; /* page array entry */
unsigned int page_array_slab_size; /* default page array slab size */
+
+ struct inode *compress_inode; /* cache compressed blocks */
+ unsigned int compress_percent; /* cache page percentage */
+ unsigned int compress_watermark; /* cache page watermark */
+ atomic_t compress_page_hit; /* cache hit count */
#endif
};
@@ -3497,7 +3506,8 @@ struct f2fs_stat_info {
unsigned int bimodal, avg_vblocks;
int util_free, util_valid, util_invalid;
int rsvd_segs, overp_segs;
- int dirty_count, node_pages, meta_pages;
+ int dirty_count, node_pages, meta_pages, compress_pages;
+ int compress_page_hit;
int prefree_count, call_count, cp_count, bg_cp_count;
int tot_segs, node_segs, data_segs, free_segs, free_secs;
int bg_node_segs, bg_data_segs;
@@ -3839,7 +3849,8 @@ bool f2fs_is_compress_backend_ready(struct inode *inode);
bool f2fs_is_compress_algorithm_valid(unsigned char algorithm);
int f2fs_init_compress_mempool(void);
void f2fs_destroy_compress_mempool(void);
-void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity);
+void f2fs_do_decompress_pages(struct decompress_io_ctx *dic, bool verity);
+void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity, unsigned int ofs);
bool f2fs_cluster_is_empty(struct compress_ctx *cc);
bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index);
void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page);
@@ -3858,10 +3869,18 @@ void f2fs_decompress_end_io(struct page **rpages,
int f2fs_init_compress_ctx(struct compress_ctx *cc);
void f2fs_destroy_compress_ctx(struct compress_ctx *cc);
void f2fs_init_compress_info(struct f2fs_sb_info *sbi);
+int f2fs_init_compress_inode(struct f2fs_sb_info *sbi);
+void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi);
int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi);
void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi);
int __init f2fs_init_compress_cache(void);
void f2fs_destroy_compress_cache(void);
+struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi);
+void invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr);
+void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
+ block_t blkaddr);
+void f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
+ block_t blkaddr);
#else
static inline bool f2fs_is_compressed_page(struct page *page) { return false; }
static inline bool f2fs_is_compress_backend_ready(struct inode *inode)
@@ -3882,10 +3901,18 @@ static inline struct page *f2fs_compress_control_page(struct page *page)
}
static inline int f2fs_init_compress_mempool(void) { return 0; }
static inline void f2fs_destroy_compress_mempool(void) { }
+static inline int f2fs_init_compress_inode(struct f2fs_sb_info *sbi) { return 0; }
+static inline void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi) { }
static inline int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) { return 0; }
static inline void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) { }
static inline int __init f2fs_init_compress_cache(void) { return 0; }
static inline void f2fs_destroy_compress_cache(void) { }
+static inline void invalidate_compress_page(struct f2fs_sb_info *sbi,
+ block_t blkaddr) { }
+static inline void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi,
+ struct page *page, block_t blkaddr) { }
+static inline void f2fs_load_compressed_page(struct f2fs_sb_info *sbi,
+ struct page *page, block_t blkaddr) { }
#endif
static inline void set_compress_context(struct inode *inode)
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 05641a1e36cc..b2a558e76b61 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1225,6 +1225,7 @@ static int move_data_block(struct inode *inode, block_t bidx,
f2fs_put_page(mpage, 1);
invalidate_mapping_pages(META_MAPPING(fio.sbi),
fio.old_blkaddr, fio.old_blkaddr);
+ invalidate_compress_page(fio.sbi, fio.old_blkaddr);
set_page_dirty(fio.encrypted_page);
if (clear_page_dirty_for_io(fio.encrypted_page))
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 349d9cb933ee..96f1da15ee5c 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -18,6 +18,10 @@
#include <trace/events/f2fs.h>
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+extern const struct address_space_operations f2fs_compress_aops;
+#endif
+
void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
{
if (is_inode_flag_set(inode, FI_NEW_INODE))
@@ -494,6 +498,11 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
goto make_now;
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ if (ino == F2FS_COMPRESS_INO(sbi))
+ goto make_now;
+#endif
+
ret = do_read_inode(inode);
if (ret)
goto bad_inode;
@@ -504,6 +513,10 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
} else if (ino == F2FS_META_INO(sbi)) {
inode->i_mapping->a_ops = &f2fs_meta_aops;
mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
+ } else if (ino == F2FS_COMPRESS_INO(sbi)) {
+ inode->i_mapping->a_ops = &f2fs_compress_aops;
+ mapping_set_gfp_mask(inode->i_mapping,
+ GFP_NOFS | __GFP_HIGHMEM | __GFP_MOVABLE);
} else if (S_ISREG(inode->i_mode)) {
inode->i_op = &f2fs_file_inode_operations;
inode->i_fop = &f2fs_file_operations;
@@ -723,7 +736,8 @@ void f2fs_evict_inode(struct inode *inode)
truncate_inode_pages_final(&inode->i_data);
if (inode->i_ino == F2FS_NODE_INO(sbi) ||
- inode->i_ino == F2FS_META_INO(sbi))
+ inode->i_ino == F2FS_META_INO(sbi) ||
+ inode->i_ino == F2FS_COMPRESS_INO(sbi))
goto out_clear;
f2fs_bug_on(sbi, get_dirty_pages(inode));
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 1596502f7375..39d6dce09fb7 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2298,6 +2298,7 @@ void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
return;
invalidate_mapping_pages(META_MAPPING(sbi), addr, addr);
+ invalidate_compress_page(sbi, addr);
/* add it into sit main buffer */
down_write(&sit_i->sentry_lock);
@@ -3425,9 +3426,11 @@ static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
reallocate:
f2fs_allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
&fio->new_blkaddr, sum, type, fio);
- if (GET_SEGNO(fio->sbi, fio->old_blkaddr) != NULL_SEGNO)
+ if (GET_SEGNO(fio->sbi, fio->old_blkaddr) != NULL_SEGNO) {
invalidate_mapping_pages(META_MAPPING(fio->sbi),
fio->old_blkaddr, fio->old_blkaddr);
+ invalidate_compress_page(fio->sbi, fio->old_blkaddr);
+ }
/* writeout dirty page into bdev */
f2fs_submit_page_write(fio);
@@ -3600,6 +3603,7 @@ void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) {
invalidate_mapping_pages(META_MAPPING(sbi),
old_blkaddr, old_blkaddr);
+ invalidate_compress_page(sbi, old_blkaddr);
if (!from_gc)
update_segment_mtime(sbi, old_blkaddr, 0);
update_sit_entry(sbi, old_blkaddr, -1);
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index f8de4d83a5be..a26efe531c71 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -147,6 +147,7 @@ enum {
Opt_compress_log_size,
Opt_compress_extension,
Opt_compress_chksum,
+ Opt_compress_cache,
Opt_atgc,
Opt_err,
};
@@ -216,6 +217,7 @@ static match_table_t f2fs_tokens = {
{Opt_compress_log_size, "compress_log_size=%u"},
{Opt_compress_extension, "compress_extension=%s"},
{Opt_compress_chksum, "compress_chksum"},
+ {Opt_compress_cache, "compress_cache"},
{Opt_atgc, "atgc"},
{Opt_err, NULL},
};
@@ -939,11 +941,15 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
case Opt_compress_chksum:
F2FS_OPTION(sbi).compress_chksum = true;
break;
+ case Opt_compress_cache:
+ set_opt(sbi, COMPRESS_CACHE);
+ break;
#else
case Opt_compress_algorithm:
case Opt_compress_log_size:
case Opt_compress_extension:
case Opt_compress_chksum:
+ case Opt_compress_cache:
f2fs_info(sbi, "compression options not supported");
break;
#endif
@@ -1268,6 +1274,8 @@ static void f2fs_put_super(struct super_block *sb)
f2fs_bug_on(sbi, sbi->fsync_node_num);
+ f2fs_destroy_compress_inode(sbi);
+
iput(sbi->node_inode);
sbi->node_inode = NULL;
@@ -1532,6 +1540,9 @@ static inline void f2fs_show_compress_options(struct seq_file *seq,
if (F2FS_OPTION(sbi).compress_chksum)
seq_puts(seq, ",compress_chksum");
+
+ if (test_opt(sbi, COMPRESS_CACHE))
+ seq_puts(seq, ",compress_cache");
}
static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
@@ -3754,10 +3765,14 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
goto free_node_inode;
}
- err = f2fs_register_sysfs(sbi);
+ err = f2fs_init_compress_inode(sbi);
if (err)
goto free_root_inode;
+ err = f2fs_register_sysfs(sbi);
+ if (err)
+ goto free_compress_inode;
+
#ifdef CONFIG_QUOTA
/* Enable quota usage during mount */
if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
@@ -3891,6 +3906,8 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
/* evict some inodes being cached by GC */
evict_inodes(sb);
f2fs_unregister_sysfs(sbi);
+free_compress_inode:
+ f2fs_destroy_compress_inode(sbi);
free_root_inode:
dput(sb->s_root);
sb->s_root = NULL;
diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index 7dc2a06cf19a..55be7afeee90 100644
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -34,6 +34,7 @@
#define F2FS_ROOT_INO(sbi) ((sbi)->root_ino_num)
#define F2FS_NODE_INO(sbi) ((sbi)->node_ino_num)
#define F2FS_META_INO(sbi) ((sbi)->meta_ino_num)
+#define F2FS_COMPRESS_INO(sbi) (NM_I(sbi)->max_nid)
#define F2FS_MAX_QUOTAS 3
--
2.26.2
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