From 23fa18eaa71266feff7ba8d83022d9e1cc83c65a Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:42:03 +0000
Subject: [PATCH] disable pwm7
---
kernel/fs/f2fs/compress.c | 1064 ++++++++++++++++++++++++++++++++++++++++++++---------------
1 files changed, 794 insertions(+), 270 deletions(-)
diff --git a/kernel/fs/f2fs/compress.c b/kernel/fs/f2fs/compress.c
index d6f622f..d72fb4f 100644
--- a/kernel/fs/f2fs/compress.c
+++ b/kernel/fs/f2fs/compress.c
@@ -12,11 +12,39 @@
#include <linux/lzo.h>
#include <linux/lz4.h>
#include <linux/zstd.h>
-#include <linux/moduleparam.h>
+#include <linux/pagevec.h>
#include "f2fs.h"
#include "node.h"
+#include "segment.h"
#include <trace/events/f2fs.h>
+
+static struct kmem_cache *cic_entry_slab;
+static struct kmem_cache *dic_entry_slab;
+
+static void *page_array_alloc(struct inode *inode, int nr)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ unsigned int size = sizeof(struct page *) * nr;
+
+ if (likely(size <= sbi->page_array_slab_size))
+ return kmem_cache_zalloc(sbi->page_array_slab, GFP_NOFS);
+ return f2fs_kzalloc(sbi, size, GFP_NOFS);
+}
+
+static void page_array_free(struct inode *inode, void *pages, int nr)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ unsigned int size = sizeof(struct page *) * nr;
+
+ if (!pages)
+ return;
+
+ if (likely(size <= sbi->page_array_slab_size))
+ kmem_cache_free(sbi->page_array_slab, pages);
+ else
+ kfree(pages);
+}
struct f2fs_compress_ops {
int (*init_compress_ctx)(struct compress_ctx *cc);
@@ -48,8 +76,9 @@
return false;
if (!page_private(page))
return false;
- if (IS_ATOMIC_WRITTEN_PAGE(page) || IS_DUMMY_WRITTEN_PAGE(page))
+ if (page_private_nonpointer(page))
return false;
+
f2fs_bug_on(F2FS_M_SB(page->mapping),
*((u32 *)page_private(page)) != F2FS_COMPRESSED_PAGE_MAGIC);
return true;
@@ -58,8 +87,7 @@
static void f2fs_set_compressed_page(struct page *page,
struct inode *inode, pgoff_t index, void *data)
{
- SetPagePrivate(page);
- set_page_private(page, (unsigned long)data);
+ attach_page_private(page, (void *)data);
/* i_crypto_info and iv index */
page->index = index;
@@ -90,19 +118,6 @@
f2fs_drop_rpages(cc, len, true);
}
-static void f2fs_put_rpages_mapping(struct address_space *mapping,
- pgoff_t start, int len)
-{
- int i;
-
- for (i = 0; i < len; i++) {
- struct page *page = find_get_page(mapping, start + i);
-
- put_page(page);
- put_page(page);
- }
-}
-
static void f2fs_put_rpages_wbc(struct compress_ctx *cc,
struct writeback_control *wbc, bool redirty, int unlock)
{
@@ -124,23 +139,21 @@
int f2fs_init_compress_ctx(struct compress_ctx *cc)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
-
- if (cc->nr_rpages)
+ if (cc->rpages)
return 0;
- cc->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) <<
- cc->log_cluster_size, GFP_NOFS);
+ cc->rpages = page_array_alloc(cc->inode, cc->cluster_size);
return cc->rpages ? 0 : -ENOMEM;
}
-void f2fs_destroy_compress_ctx(struct compress_ctx *cc)
+void f2fs_destroy_compress_ctx(struct compress_ctx *cc, bool reuse)
{
- kfree(cc->rpages);
+ page_array_free(cc->inode, cc->rpages, cc->cluster_size);
cc->rpages = NULL;
cc->nr_rpages = 0;
cc->nr_cpages = 0;
- cc->cluster_idx = NULL_CLUSTER;
+ if (!reuse)
+ cc->cluster_idx = NULL_CLUSTER;
}
void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page)
@@ -222,8 +235,14 @@
#ifdef CONFIG_F2FS_FS_LZ4
static int lz4_init_compress_ctx(struct compress_ctx *cc)
{
- cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode),
- LZ4_MEM_COMPRESS, GFP_NOFS);
+ unsigned int size = LZ4_MEM_COMPRESS;
+
+#ifdef CONFIG_F2FS_FS_LZ4HC
+ if (F2FS_I(cc->inode)->i_compress_flag >> COMPRESS_LEVEL_OFFSET)
+ size = LZ4HC_MEM_COMPRESS;
+#endif
+
+ cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), size, GFP_NOFS);
if (!cc->private)
return -ENOMEM;
@@ -242,10 +261,34 @@
cc->private = NULL;
}
+#ifdef CONFIG_F2FS_FS_LZ4HC
+static int lz4hc_compress_pages(struct compress_ctx *cc)
+{
+ unsigned char level = F2FS_I(cc->inode)->i_compress_flag >>
+ COMPRESS_LEVEL_OFFSET;
+ int len;
+
+ if (level)
+ len = LZ4_compress_HC(cc->rbuf, cc->cbuf->cdata, cc->rlen,
+ cc->clen, level, cc->private);
+ else
+ len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen,
+ cc->clen, cc->private);
+ if (!len)
+ return -EAGAIN;
+
+ cc->clen = len;
+ return 0;
+}
+#endif
+
static int lz4_compress_pages(struct compress_ctx *cc)
{
int len;
+#ifdef CONFIG_F2FS_FS_LZ4HC
+ return lz4hc_compress_pages(cc);
+#endif
len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen,
cc->clen, cc->private);
if (!len)
@@ -268,10 +311,9 @@
}
if (ret != PAGE_SIZE << dic->log_cluster_size) {
- printk_ratelimited("%sF2FS-fs (%s): lz4 invalid rlen:%zu, "
+ printk_ratelimited("%sF2FS-fs (%s): lz4 invalid ret:%d, "
"expected:%lu\n", KERN_ERR,
- F2FS_I_SB(dic->inode)->sb->s_id,
- dic->rlen,
+ F2FS_I_SB(dic->inode)->sb->s_id, ret,
PAGE_SIZE << dic->log_cluster_size);
return -EIO;
}
@@ -295,8 +337,13 @@
ZSTD_CStream *stream;
void *workspace;
unsigned int workspace_size;
+ unsigned char level = F2FS_I(cc->inode)->i_compress_flag >>
+ COMPRESS_LEVEL_OFFSET;
- params = ZSTD_getParams(F2FS_ZSTD_DEFAULT_CLEVEL, cc->rlen, 0);
+ if (!level)
+ level = F2FS_ZSTD_DEFAULT_CLEVEL;
+
+ params = ZSTD_getParams(level, cc->rlen, 0);
workspace_size = ZSTD_CStreamWorkspaceBound(params.cParams);
workspace = f2fs_kvmalloc(F2FS_I_SB(cc->inode),
@@ -376,16 +423,17 @@
ZSTD_DStream *stream;
void *workspace;
unsigned int workspace_size;
+ unsigned int max_window_size =
+ MAX_COMPRESS_WINDOW_SIZE(dic->log_cluster_size);
- workspace_size = ZSTD_DStreamWorkspaceBound(MAX_COMPRESS_WINDOW_SIZE);
+ workspace_size = ZSTD_DStreamWorkspaceBound(max_window_size);
workspace = f2fs_kvmalloc(F2FS_I_SB(dic->inode),
workspace_size, GFP_NOFS);
if (!workspace)
return -ENOMEM;
- stream = ZSTD_initDStream(MAX_COMPRESS_WINDOW_SIZE,
- workspace, workspace_size);
+ stream = ZSTD_initDStream(max_window_size, workspace, workspace_size);
if (!stream) {
printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_initDStream failed\n",
KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id,
@@ -452,6 +500,31 @@
};
#endif
+#ifdef CONFIG_F2FS_FS_LZO
+#ifdef CONFIG_F2FS_FS_LZORLE
+static int lzorle_compress_pages(struct compress_ctx *cc)
+{
+ int ret;
+
+ ret = lzorle1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata,
+ &cc->clen, cc->private);
+ if (ret != LZO_E_OK) {
+ printk_ratelimited("%sF2FS-fs (%s): lzo-rle compress failed, ret:%d\n",
+ KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret);
+ return -EIO;
+ }
+ return 0;
+}
+
+static const struct f2fs_compress_ops f2fs_lzorle_ops = {
+ .init_compress_ctx = lzo_init_compress_ctx,
+ .destroy_compress_ctx = lzo_destroy_compress_ctx,
+ .compress_pages = lzorle_compress_pages,
+ .decompress_pages = lzo_decompress_pages,
+};
+#endif
+#endif
+
static const struct f2fs_compress_ops *f2fs_cops[COMPRESS_MAX] = {
#ifdef CONFIG_F2FS_FS_LZO
&f2fs_lzo_ops,
@@ -468,6 +541,11 @@
#else
NULL,
#endif
+#if defined(CONFIG_F2FS_FS_LZO) && defined(CONFIG_F2FS_FS_LZORLE)
+ &f2fs_lzorle_ops,
+#else
+ NULL,
+#endif
};
bool f2fs_is_compress_backend_ready(struct inode *inode)
@@ -477,7 +555,7 @@
return f2fs_cops[F2FS_I(inode)->i_compress_algorithm];
}
-static mempool_t *compress_page_pool = NULL;
+static mempool_t *compress_page_pool;
static int num_compress_pages = 512;
module_param(num_compress_pages, uint, 0444);
MODULE_PARM_DESC(num_compress_pages,
@@ -511,20 +589,36 @@
{
if (!page)
return;
- set_page_private(page, (unsigned long)NULL);
- ClearPagePrivate(page);
+ detach_page_private(page);
page->mapping = NULL;
unlock_page(page);
mempool_free(page, compress_page_pool);
}
+#define MAX_VMAP_RETRIES 3
+
+static void *f2fs_vmap(struct page **pages, unsigned int count)
+{
+ int i;
+ void *buf = NULL;
+
+ for (i = 0; i < MAX_VMAP_RETRIES; i++) {
+ buf = vm_map_ram(pages, count, -1);
+ if (buf)
+ break;
+ vm_unmap_aliases();
+ }
+ return buf;
+}
+
static int f2fs_compress_pages(struct compress_ctx *cc)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
struct f2fs_inode_info *fi = F2FS_I(cc->inode);
const struct f2fs_compress_ops *cops =
f2fs_cops[fi->i_compress_algorithm];
- unsigned int max_len, nr_cpages;
+ unsigned int max_len, new_nr_cpages;
+ struct page **new_cpages;
+ u32 chksum = 0;
int i, ret;
trace_f2fs_compress_pages_start(cc->inode, cc->cluster_idx,
@@ -539,8 +633,7 @@
max_len = COMPRESS_HEADER_SIZE + cc->clen;
cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE);
- cc->cpages = f2fs_kzalloc(sbi, sizeof(struct page *) *
- cc->nr_cpages, GFP_NOFS);
+ cc->cpages = page_array_alloc(cc->inode, cc->nr_cpages);
if (!cc->cpages) {
ret = -ENOMEM;
goto destroy_compress_ctx;
@@ -554,13 +647,13 @@
}
}
- cc->rbuf = vmap(cc->rpages, cc->cluster_size, VM_MAP, PAGE_KERNEL_RO);
+ cc->rbuf = f2fs_vmap(cc->rpages, cc->cluster_size);
if (!cc->rbuf) {
ret = -ENOMEM;
goto out_free_cpages;
}
- cc->cbuf = vmap(cc->cpages, cc->nr_cpages, VM_MAP, PAGE_KERNEL);
+ cc->cbuf = f2fs_vmap(cc->cpages, cc->nr_cpages);
if (!cc->cbuf) {
ret = -ENOMEM;
goto out_vunmap_rbuf;
@@ -579,19 +672,36 @@
cc->cbuf->clen = cpu_to_le32(cc->clen);
+ if (fi->i_compress_flag & 1 << COMPRESS_CHKSUM)
+ chksum = f2fs_crc32(F2FS_I_SB(cc->inode),
+ cc->cbuf->cdata, cc->clen);
+ cc->cbuf->chksum = cpu_to_le32(chksum);
+
for (i = 0; i < COMPRESS_DATA_RESERVED_SIZE; i++)
cc->cbuf->reserved[i] = cpu_to_le32(0);
- nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE);
+ new_nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE);
+
+ /* Now we're going to cut unnecessary tail pages */
+ new_cpages = page_array_alloc(cc->inode, new_nr_cpages);
+ if (!new_cpages) {
+ ret = -ENOMEM;
+ goto out_vunmap_cbuf;
+ }
/* zero out any unused part of the last page */
memset(&cc->cbuf->cdata[cc->clen], 0,
- (nr_cpages * PAGE_SIZE) - (cc->clen + COMPRESS_HEADER_SIZE));
+ (new_nr_cpages * PAGE_SIZE) -
+ (cc->clen + COMPRESS_HEADER_SIZE));
- vunmap(cc->cbuf);
- vunmap(cc->rbuf);
+ vm_unmap_ram(cc->cbuf, cc->nr_cpages);
+ vm_unmap_ram(cc->rbuf, cc->cluster_size);
- for (i = nr_cpages; i < cc->nr_cpages; i++) {
+ for (i = 0; i < cc->nr_cpages; i++) {
+ if (i < new_nr_cpages) {
+ new_cpages[i] = cc->cpages[i];
+ continue;
+ }
f2fs_compress_free_page(cc->cpages[i]);
cc->cpages[i] = NULL;
}
@@ -599,22 +709,24 @@
if (cops->destroy_compress_ctx)
cops->destroy_compress_ctx(cc);
- cc->nr_cpages = nr_cpages;
+ page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
+ cc->cpages = new_cpages;
+ cc->nr_cpages = new_nr_cpages;
trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx,
cc->clen, ret);
return 0;
out_vunmap_cbuf:
- vunmap(cc->cbuf);
+ vm_unmap_ram(cc->cbuf, cc->nr_cpages);
out_vunmap_rbuf:
- vunmap(cc->rbuf);
+ vm_unmap_ram(cc->rbuf, cc->cluster_size);
out_free_cpages:
for (i = 0; i < cc->nr_cpages; i++) {
if (cc->cpages[i])
f2fs_compress_free_page(cc->cpages[i]);
}
- kfree(cc->cpages);
+ page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
cc->cpages = NULL;
destroy_compress_ctx:
if (cops->destroy_compress_ctx)
@@ -625,49 +737,32 @@
return ret;
}
-void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
+static int f2fs_prepare_decomp_mem(struct decompress_io_ctx *dic,
+ bool pre_alloc);
+static void f2fs_release_decomp_mem(struct decompress_io_ctx *dic,
+ bool bypass_destroy_callback, bool pre_alloc);
+
+void f2fs_decompress_cluster(struct decompress_io_ctx *dic, bool in_task)
{
- 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_inode_info *fi = F2FS_I(dic->inode);
const struct f2fs_compress_ops *cops =
f2fs_cops[fi->i_compress_algorithm];
+ bool bypass_callback = false;
int ret;
-
- dec_page_count(sbi, F2FS_RD_DATA);
-
- if (bio->bi_status || PageError(page))
- dic->failed = true;
-
- if (refcount_dec_not_one(&dic->ref))
- return;
trace_f2fs_decompress_pages_start(dic->inode, dic->cluster_idx,
dic->cluster_size, fi->i_compress_algorithm);
- /* submit partial compressed pages */
if (dic->failed) {
ret = -EIO;
- goto out_free_dic;
+ goto out_end_io;
}
- if (cops->init_decompress_ctx) {
- ret = cops->init_decompress_ctx(dic);
- if (ret)
- goto out_free_dic;
- }
-
- dic->rbuf = vmap(dic->tpages, dic->cluster_size, VM_MAP, PAGE_KERNEL);
- if (!dic->rbuf) {
- ret = -ENOMEM;
- goto destroy_decompress_ctx;
- }
-
- dic->cbuf = vmap(dic->cpages, dic->nr_cpages, VM_MAP, PAGE_KERNEL_RO);
- if (!dic->cbuf) {
- ret = -ENOMEM;
- goto out_vunmap_rbuf;
+ ret = f2fs_prepare_decomp_mem(dic, false);
+ if (ret) {
+ bypass_callback = true;
+ goto out_release;
}
dic->clen = le32_to_cpu(dic->cbuf->clen);
@@ -675,29 +770,59 @@
if (dic->clen > PAGE_SIZE * dic->nr_cpages - COMPRESS_HEADER_SIZE) {
ret = -EFSCORRUPTED;
- goto out_vunmap_cbuf;
+ goto out_release;
}
ret = cops->decompress_pages(dic);
-out_vunmap_cbuf:
- vunmap(dic->cbuf);
-out_vunmap_rbuf:
- vunmap(dic->rbuf);
-destroy_decompress_ctx:
- if (cops->destroy_decompress_ctx)
- cops->destroy_decompress_ctx(dic);
-out_free_dic:
- if (verity)
- refcount_set(&dic->ref, dic->nr_cpages);
- if (!verity)
- f2fs_decompress_end_io(dic->rpages, dic->cluster_size,
- ret, false);
+ if (!ret && (fi->i_compress_flag & 1 << COMPRESS_CHKSUM)) {
+ u32 provided = le32_to_cpu(dic->cbuf->chksum);
+ u32 calculated = f2fs_crc32(sbi, dic->cbuf->cdata, dic->clen);
+ if (provided != calculated) {
+ if (!is_inode_flag_set(dic->inode, FI_COMPRESS_CORRUPT)) {
+ set_inode_flag(dic->inode, FI_COMPRESS_CORRUPT);
+ printk_ratelimited(
+ "%sF2FS-fs (%s): checksum invalid, nid = %lu, %x vs %x",
+ KERN_INFO, sbi->sb->s_id, dic->inode->i_ino,
+ provided, calculated);
+ }
+ set_sbi_flag(sbi, SBI_NEED_FSCK);
+ }
+ }
+
+out_release:
+ f2fs_release_decomp_mem(dic, bypass_callback, false);
+
+out_end_io:
trace_f2fs_decompress_pages_end(dic->inode, dic->cluster_idx,
dic->clen, ret);
- if (!verity)
- f2fs_free_dic(dic);
+ f2fs_decompress_end_io(dic, ret, in_task);
+}
+
+/*
+ * This is called when a page of a compressed cluster has been read from disk
+ * (or failed to be read from disk). It checks whether this page was the last
+ * page being waited on in the cluster, and if so, it decompresses the cluster
+ * (or in the case of a failure, cleans up without actually decompressing).
+ */
+void f2fs_end_read_compressed_page(struct page *page, bool failed,
+ block_t blkaddr, bool in_task)
+{
+ struct decompress_io_ctx *dic =
+ (struct decompress_io_ctx *)page_private(page);
+ struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode);
+
+ dec_page_count(sbi, F2FS_RD_DATA);
+
+ if (failed)
+ WRITE_ONCE(dic->failed, true);
+ else if (blkaddr && in_task)
+ f2fs_cache_compressed_page(sbi, page,
+ dic->inode->i_ino, blkaddr);
+
+ if (atomic_dec_and_test(&dic->remaining_pages))
+ f2fs_decompress_cluster(dic, in_task);
}
static bool is_page_in_cluster(struct compress_ctx *cc, pgoff_t index)
@@ -724,9 +849,8 @@
return is_page_in_cluster(cc, index);
}
-static bool __cluster_may_compress(struct compress_ctx *cc)
+static bool cluster_has_invalid_data(struct compress_ctx *cc)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
loff_t i_size = i_size_read(cc->inode);
unsigned nr_pages = DIV_ROUND_UP(i_size, PAGE_SIZE);
int i;
@@ -734,28 +858,26 @@
for (i = 0; i < cc->cluster_size; i++) {
struct page *page = cc->rpages[i];
- f2fs_bug_on(sbi, !page);
-
- if (unlikely(f2fs_cp_error(sbi)))
- return false;
- if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
- return false;
+ f2fs_bug_on(F2FS_I_SB(cc->inode), !page);
/* beyond EOF */
if (page->index >= nr_pages)
- return false;
+ return true;
}
- return true;
+ return false;
}
-static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
+static int __f2fs_cluster_blocks(struct inode *inode,
+ unsigned int cluster_idx, bool compr)
{
struct dnode_of_data dn;
+ unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
+ unsigned int start_idx = cluster_idx <<
+ F2FS_I(inode)->i_log_cluster_size;
int ret;
- set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
- ret = f2fs_get_dnode_of_data(&dn, start_idx_of_cluster(cc),
- LOOKUP_NODE);
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
if (ret) {
if (ret == -ENOENT)
ret = 0;
@@ -766,7 +888,7 @@
int i;
ret = 1;
- for (i = 1; i < cc->cluster_size; i++) {
+ for (i = 1; i < cluster_size; i++) {
block_t blkaddr;
blkaddr = data_blkaddr(dn.inode,
@@ -779,6 +901,10 @@
ret++;
}
}
+
+ f2fs_bug_on(F2FS_I_SB(inode),
+ !compr && ret != cluster_size &&
+ !is_inode_flag_set(inode, FI_COMPRESS_RELEASED));
}
fail:
f2fs_put_dnode(&dn);
@@ -788,40 +914,28 @@
/* return # of compressed blocks in compressed cluster */
static int f2fs_compressed_blocks(struct compress_ctx *cc)
{
- return __f2fs_cluster_blocks(cc, true);
+ return __f2fs_cluster_blocks(cc->inode, cc->cluster_idx, true);
}
/* return # of valid blocks in compressed cluster */
-static int f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
-{
- return __f2fs_cluster_blocks(cc, false);
-}
-
int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index)
{
- struct compress_ctx cc = {
- .inode = inode,
- .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
- .cluster_size = F2FS_I(inode)->i_cluster_size,
- .cluster_idx = index >> F2FS_I(inode)->i_log_cluster_size,
- };
-
- return f2fs_cluster_blocks(&cc, false);
+ return __f2fs_cluster_blocks(inode,
+ index >> F2FS_I(inode)->i_log_cluster_size,
+ false);
}
static bool cluster_may_compress(struct compress_ctx *cc)
{
- if (!f2fs_compressed_file(cc->inode))
+ if (!f2fs_need_compress_data(cc->inode))
return false;
if (f2fs_is_atomic_file(cc->inode))
- return false;
- if (f2fs_is_mmap_file(cc->inode))
return false;
if (!f2fs_cluster_is_full(cc))
return false;
if (unlikely(f2fs_cp_error(F2FS_I_SB(cc->inode))))
return false;
- return __cluster_may_compress(cc);
+ return !cluster_has_invalid_data(cc);
}
static void set_cluster_writeback(struct compress_ctx *cc)
@@ -849,20 +963,15 @@
struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
struct address_space *mapping = cc->inode->i_mapping;
struct page *page;
- struct dnode_of_data dn;
sector_t last_block_in_bio;
unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT;
pgoff_t start_idx = start_idx_of_cluster(cc);
int i, ret;
- bool prealloc;
retry:
- ret = f2fs_cluster_blocks(cc, false);
+ ret = f2fs_is_compressed_cluster(cc->inode, start_idx);
if (ret <= 0)
return ret;
-
- /* compressed case */
- prealloc = (ret < cc->cluster_size);
ret = f2fs_init_compress_ctx(cc);
if (ret)
@@ -878,7 +987,7 @@
}
if (PageUptodate(page))
- unlock_page(page);
+ f2fs_put_page(page, 1);
else
f2fs_compress_ctx_add_page(cc, page);
}
@@ -888,54 +997,37 @@
ret = f2fs_read_multi_pages(cc, &bio, cc->cluster_size,
&last_block_in_bio, false, true);
- f2fs_destroy_compress_ctx(cc);
+ f2fs_put_rpages(cc);
+ f2fs_destroy_compress_ctx(cc, true);
if (ret)
- goto release_pages;
+ goto out;
if (bio)
f2fs_submit_bio(sbi, bio, DATA);
ret = f2fs_init_compress_ctx(cc);
if (ret)
- goto release_pages;
+ goto out;
}
for (i = 0; i < cc->cluster_size; i++) {
f2fs_bug_on(sbi, cc->rpages[i]);
page = find_lock_page(mapping, start_idx + i);
- f2fs_bug_on(sbi, !page);
+ if (!page) {
+ /* page can be truncated */
+ goto release_and_retry;
+ }
f2fs_wait_on_page_writeback(page, DATA, true, true);
-
f2fs_compress_ctx_add_page(cc, page);
- f2fs_put_page(page, 0);
if (!PageUptodate(page)) {
+release_and_retry:
+ f2fs_put_rpages(cc);
f2fs_unlock_rpages(cc, i + 1);
- f2fs_put_rpages_mapping(mapping, start_idx,
- cc->cluster_size);
- f2fs_destroy_compress_ctx(cc);
+ f2fs_destroy_compress_ctx(cc, true);
goto retry;
}
- }
-
- if (prealloc) {
- __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true);
-
- set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
-
- for (i = cc->cluster_size - 1; i > 0; i--) {
- ret = f2fs_get_block(&dn, start_idx + i);
- if (ret) {
- i = cc->cluster_size;
- break;
- }
-
- if (dn.data_blkaddr != NEW_ADDR)
- break;
- }
-
- __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false);
}
if (likely(!ret)) {
@@ -945,10 +1037,10 @@
}
unlock_pages:
+ f2fs_put_rpages(cc);
f2fs_unlock_rpages(cc, i);
-release_pages:
- f2fs_put_rpages_mapping(mapping, start_idx, i);
- f2fs_destroy_compress_ctx(cc);
+ f2fs_destroy_compress_ctx(cc, true);
+out:
return ret;
}
@@ -972,6 +1064,7 @@
{
struct compress_ctx cc = {
+ .inode = inode,
.log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
.cluster_size = F2FS_I(inode)->i_cluster_size,
.rpages = fsdata,
@@ -982,7 +1075,7 @@
set_cluster_dirty(&cc);
f2fs_put_rpages_wbc(&cc, NULL, false, 1);
- f2fs_destroy_compress_ctx(&cc);
+ f2fs_destroy_compress_ctx(&cc, false);
return first_index;
}
@@ -1057,7 +1150,7 @@
.submitted = false,
.io_type = io_type,
.io_wbc = wbc,
- .encrypted = f2fs_encrypted_file(cc->inode),
+ .encrypted = fscrypt_inode_uses_fs_layer_crypto(cc->inode),
};
struct dnode_of_data dn;
struct node_info ni;
@@ -1067,8 +1160,22 @@
loff_t psize;
int i, err;
- if (!IS_NOQUOTA(inode) && !f2fs_trylock_op(sbi))
- return -EAGAIN;
+ /* we should bypass data pages to proceed the kworkder jobs */
+ if (unlikely(f2fs_cp_error(sbi))) {
+ mapping_set_error(cc->rpages[0]->mapping, -EIO);
+ goto out_free;
+ }
+
+ if (IS_NOQUOTA(inode)) {
+ /*
+ * We need to wait for node_write to avoid block allocation during
+ * checkpoint. This can only happen to quota writes which can cause
+ * the below discard race condition.
+ */
+ f2fs_down_read(&sbi->node_write);
+ } else if (!f2fs_trylock_op(sbi)) {
+ goto out_free;
+ }
set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
@@ -1084,21 +1191,20 @@
psize = (loff_t)(cc->rpages[last_index]->index + 1) << PAGE_SHIFT;
- err = f2fs_get_node_info(fio.sbi, dn.nid, &ni);
+ err = f2fs_get_node_info(fio.sbi, dn.nid, &ni, false);
if (err)
goto out_put_dnode;
fio.version = ni.version;
- cic = f2fs_kzalloc(sbi, sizeof(struct compress_io_ctx), GFP_NOFS);
+ cic = kmem_cache_zalloc(cic_entry_slab, GFP_NOFS);
if (!cic)
goto out_put_dnode;
cic->magic = F2FS_COMPRESSED_PAGE_MAGIC;
cic->inode = inode;
- refcount_set(&cic->ref, cc->nr_cpages);
- cic->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) <<
- cc->log_cluster_size, GFP_NOFS);
+ atomic_set(&cic->pending_pages, cc->nr_cpages);
+ cic->rpages = page_array_alloc(cc->inode, cc->cluster_size);
if (!cic->rpages)
goto out_put_cic;
@@ -1108,13 +1214,19 @@
f2fs_set_compressed_page(cc->cpages[i], inode,
cc->rpages[i + 1]->index, cic);
fio.compressed_page = cc->cpages[i];
+
+ fio.old_blkaddr = data_blkaddr(dn.inode, dn.node_page,
+ dn.ofs_in_node + i + 1);
+
+ /* wait for GCed page writeback via META_MAPPING */
+ f2fs_wait_on_block_writeback(inode, fio.old_blkaddr);
+
if (fio.encrypted) {
fio.page = cc->rpages[i + 1];
err = f2fs_encrypt_one_page(&fio);
if (err)
goto out_destroy_crypt;
- if (fscrypt_inode_uses_fs_layer_crypto(inode))
- cc->cpages[i] = fio.encrypted_page;
+ cc->cpages[i] = fio.encrypted_page;
}
}
@@ -1153,7 +1265,7 @@
f2fs_bug_on(fio.sbi, blkaddr == NULL_ADDR);
- if (fio.encrypted && fscrypt_inode_uses_fs_layer_crypto(inode))
+ if (fio.encrypted)
fio.encrypted_page = cc->cpages[i - 1];
else
fio.compressed_page = cc->cpages[i - 1];
@@ -1169,13 +1281,16 @@
if (fio.compr_blocks)
f2fs_i_compr_blocks_update(inode, fio.compr_blocks - 1, false);
f2fs_i_compr_blocks_update(inode, cc->nr_cpages, true);
+ add_compr_block_stat(inode, cc->nr_cpages);
set_inode_flag(cc->inode, FI_APPEND_WRITE);
if (cc->cluster_idx == 0)
set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
f2fs_put_dnode(&dn);
- if (!IS_NOQUOTA(inode))
+ if (IS_NOQUOTA(inode))
+ f2fs_up_read(&sbi->node_write);
+ else
f2fs_unlock_op(sbi);
spin_lock(&fi->i_size_lock);
@@ -1184,26 +1299,34 @@
spin_unlock(&fi->i_size_lock);
f2fs_put_rpages(cc);
- f2fs_destroy_compress_ctx(cc);
+ page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
+ cc->cpages = NULL;
+ f2fs_destroy_compress_ctx(cc, false);
return 0;
out_destroy_crypt:
- kfree(cic->rpages);
+ page_array_free(cc->inode, cic->rpages, cc->cluster_size);
for (--i; i >= 0; i--)
fscrypt_finalize_bounce_page(&cc->cpages[i]);
- for (i = 0; i < cc->nr_cpages; i++) {
- if (!cc->cpages[i])
- continue;
- f2fs_put_page(cc->cpages[i], 1);
- }
out_put_cic:
- kfree(cic);
+ kmem_cache_free(cic_entry_slab, cic);
out_put_dnode:
f2fs_put_dnode(&dn);
out_unlock_op:
- if (!IS_NOQUOTA(inode))
+ if (IS_NOQUOTA(inode))
+ f2fs_up_read(&sbi->node_write);
+ else
f2fs_unlock_op(sbi);
+out_free:
+ for (i = 0; i < cc->nr_cpages; i++) {
+ if (!cc->cpages[i])
+ continue;
+ f2fs_compress_free_page(cc->cpages[i]);
+ cc->cpages[i] = NULL;
+ }
+ page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
+ cc->cpages = NULL;
return -EAGAIN;
}
@@ -1221,17 +1344,17 @@
dec_page_count(sbi, F2FS_WB_DATA);
- if (refcount_dec_not_one(&cic->ref))
+ if (atomic_dec_return(&cic->pending_pages))
return;
for (i = 0; i < cic->nr_rpages; i++) {
WARN_ON(!cic->rpages[i]);
- clear_cold_data(cic->rpages[i]);
+ clear_page_private_gcing(cic->rpages[i]);
end_page_writeback(cic->rpages[i]);
}
- kfree(cic->rpages);
- kfree(cic);
+ page_array_free(cic->inode, cic->rpages, cic->nr_rpages);
+ kmem_cache_free(cic_entry_slab, cic);
}
static int f2fs_write_raw_pages(struct compress_ctx *cc,
@@ -1240,29 +1363,48 @@
enum iostat_type io_type)
{
struct address_space *mapping = cc->inode->i_mapping;
- int _submitted, compr_blocks, ret;
- int i = -1, err = 0;
+ int _submitted, compr_blocks, ret, i;
compr_blocks = f2fs_compressed_blocks(cc);
- if (compr_blocks < 0) {
- err = compr_blocks;
- goto out_err;
+
+ for (i = 0; i < cc->cluster_size; i++) {
+ if (!cc->rpages[i])
+ continue;
+
+ redirty_page_for_writepage(wbc, cc->rpages[i]);
+ unlock_page(cc->rpages[i]);
}
+
+ if (compr_blocks < 0)
+ return compr_blocks;
for (i = 0; i < cc->cluster_size; i++) {
if (!cc->rpages[i])
continue;
retry_write:
+ lock_page(cc->rpages[i]);
+
if (cc->rpages[i]->mapping != mapping) {
+continue_unlock:
unlock_page(cc->rpages[i]);
continue;
}
- BUG_ON(!PageLocked(cc->rpages[i]));
+ if (!PageDirty(cc->rpages[i]))
+ goto continue_unlock;
+
+ if (PageWriteback(cc->rpages[i])) {
+ if (wbc->sync_mode == WB_SYNC_NONE)
+ goto continue_unlock;
+ f2fs_wait_on_page_writeback(cc->rpages[i], DATA, true, true);
+ }
+
+ if (!clear_page_dirty_for_io(cc->rpages[i]))
+ goto continue_unlock;
ret = f2fs_write_single_data_page(cc->rpages[i], &_submitted,
NULL, NULL, wbc, io_type,
- compr_blocks);
+ compr_blocks, false);
if (ret) {
if (ret == AOP_WRITEPAGE_ACTIVATE) {
unlock_page(cc->rpages[i]);
@@ -1273,33 +1415,23 @@
* avoid deadlock caused by cluster update race
* from foreground operation.
*/
- if (IS_NOQUOTA(cc->inode)) {
- err = 0;
- goto out_err;
- }
+ if (IS_NOQUOTA(cc->inode))
+ return 0;
ret = 0;
cond_resched();
congestion_wait(BLK_RW_ASYNC,
DEFAULT_IO_TIMEOUT);
- lock_page(cc->rpages[i]);
- clear_page_dirty_for_io(cc->rpages[i]);
goto retry_write;
}
- err = ret;
- goto out_err;
+ return ret;
}
*submitted += _submitted;
}
+
+ f2fs_balance_fs(F2FS_M_SB(mapping), true);
+
return 0;
-out_err:
- for (++i; i < cc->cluster_size; i++) {
- if (!cc->rpages[i])
- continue;
- redirty_page_for_writepage(wbc, cc->rpages[i]);
- unlock_page(cc->rpages[i]);
- }
- return err;
}
int f2fs_write_multi_pages(struct compress_ctx *cc,
@@ -1307,15 +1439,13 @@
struct writeback_control *wbc,
enum iostat_type io_type)
{
- struct f2fs_inode_info *fi = F2FS_I(cc->inode);
- const struct f2fs_compress_ops *cops =
- f2fs_cops[fi->i_compress_algorithm];
int err;
*submitted = 0;
if (cluster_may_compress(cc)) {
err = f2fs_compress_pages(cc);
if (err == -EAGAIN) {
+ add_compr_block_stat(cc->inode, cc->cluster_size);
goto write;
} else if (err) {
f2fs_put_rpages_wbc(cc, wbc, true, 1);
@@ -1324,7 +1454,6 @@
err = f2fs_write_compressed_pages(cc, submitted,
wbc, io_type);
- cops->destroy_compress_ctx(cc);
if (!err)
return 0;
f2fs_bug_on(F2FS_I_SB(cc->inode), err != -EAGAIN);
@@ -1335,84 +1464,149 @@
err = f2fs_write_raw_pages(cc, submitted, wbc, io_type);
f2fs_put_rpages_wbc(cc, wbc, false, 0);
destroy_out:
- f2fs_destroy_compress_ctx(cc);
+ f2fs_destroy_compress_ctx(cc, false);
return err;
}
-struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
+static inline bool allow_memalloc_for_decomp(struct f2fs_sb_info *sbi,
+ bool pre_alloc)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
- struct decompress_io_ctx *dic;
- pgoff_t start_idx = start_idx_of_cluster(cc);
+ return pre_alloc ^ f2fs_low_mem_mode(sbi);
+}
+
+static int f2fs_prepare_decomp_mem(struct decompress_io_ctx *dic,
+ bool pre_alloc)
+{
+ const struct f2fs_compress_ops *cops =
+ f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm];
int i;
- dic = f2fs_kzalloc(sbi, sizeof(struct decompress_io_ctx), GFP_NOFS);
+ if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc))
+ return 0;
+
+ dic->tpages = page_array_alloc(dic->inode, dic->cluster_size);
+ if (!dic->tpages)
+ return -ENOMEM;
+
+ for (i = 0; i < dic->cluster_size; i++) {
+ if (dic->rpages[i]) {
+ dic->tpages[i] = dic->rpages[i];
+ continue;
+ }
+
+ dic->tpages[i] = f2fs_compress_alloc_page();
+ if (!dic->tpages[i])
+ return -ENOMEM;
+ }
+
+ dic->rbuf = f2fs_vmap(dic->tpages, dic->cluster_size);
+ if (!dic->rbuf)
+ return -ENOMEM;
+
+ dic->cbuf = f2fs_vmap(dic->cpages, dic->nr_cpages);
+ if (!dic->cbuf)
+ return -ENOMEM;
+
+ if (cops->init_decompress_ctx) {
+ int ret = cops->init_decompress_ctx(dic);
+
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void f2fs_release_decomp_mem(struct decompress_io_ctx *dic,
+ bool bypass_destroy_callback, bool pre_alloc)
+{
+ const struct f2fs_compress_ops *cops =
+ f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm];
+
+ if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc))
+ return;
+
+ if (!bypass_destroy_callback && cops->destroy_decompress_ctx)
+ cops->destroy_decompress_ctx(dic);
+
+ if (dic->cbuf)
+ vm_unmap_ram(dic->cbuf, dic->nr_cpages);
+
+ if (dic->rbuf)
+ vm_unmap_ram(dic->rbuf, dic->cluster_size);
+}
+
+static void f2fs_free_dic(struct decompress_io_ctx *dic,
+ bool bypass_destroy_callback);
+
+struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
+{
+ struct decompress_io_ctx *dic;
+ pgoff_t start_idx = start_idx_of_cluster(cc);
+ int i, ret;
+
+ dic = kmem_cache_zalloc(dic_entry_slab, GFP_NOFS);
if (!dic)
return ERR_PTR(-ENOMEM);
- dic->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) <<
- cc->log_cluster_size, GFP_NOFS);
+ dic->rpages = page_array_alloc(cc->inode, cc->cluster_size);
if (!dic->rpages) {
- kfree(dic);
+ kmem_cache_free(dic_entry_slab, dic);
return ERR_PTR(-ENOMEM);
}
dic->magic = F2FS_COMPRESSED_PAGE_MAGIC;
dic->inode = cc->inode;
- refcount_set(&dic->ref, cc->nr_cpages);
+ atomic_set(&dic->remaining_pages, cc->nr_cpages);
dic->cluster_idx = cc->cluster_idx;
dic->cluster_size = cc->cluster_size;
dic->log_cluster_size = cc->log_cluster_size;
dic->nr_cpages = cc->nr_cpages;
+ refcount_set(&dic->refcnt, 1);
dic->failed = false;
+ dic->need_verity = f2fs_need_verity(cc->inode, start_idx);
for (i = 0; i < dic->cluster_size; i++)
dic->rpages[i] = cc->rpages[i];
dic->nr_rpages = cc->cluster_size;
- dic->cpages = f2fs_kzalloc(sbi, sizeof(struct page *) *
- dic->nr_cpages, GFP_NOFS);
- if (!dic->cpages)
+ dic->cpages = page_array_alloc(dic->inode, dic->nr_cpages);
+ if (!dic->cpages) {
+ ret = -ENOMEM;
goto out_free;
+ }
for (i = 0; i < dic->nr_cpages; i++) {
struct page *page;
page = f2fs_compress_alloc_page();
- if (!page)
+ if (!page) {
+ ret = -ENOMEM;
goto out_free;
+ }
f2fs_set_compressed_page(page, cc->inode,
start_idx + i + 1, dic);
dic->cpages[i] = page;
}
- dic->tpages = f2fs_kzalloc(sbi, sizeof(struct page *) *
- dic->cluster_size, GFP_NOFS);
- if (!dic->tpages)
+ ret = f2fs_prepare_decomp_mem(dic, true);
+ if (ret)
goto out_free;
-
- for (i = 0; i < dic->cluster_size; i++) {
- if (cc->rpages[i]) {
- dic->tpages[i] = cc->rpages[i];
- continue;
- }
-
- dic->tpages[i] = f2fs_compress_alloc_page();
- if (!dic->tpages[i])
- goto out_free;
- }
return dic;
out_free:
- f2fs_free_dic(dic);
- return ERR_PTR(-ENOMEM);
+ f2fs_free_dic(dic, true);
+ return ERR_PTR(ret);
}
-void f2fs_free_dic(struct decompress_io_ctx *dic)
+static void f2fs_free_dic(struct decompress_io_ctx *dic,
+ bool bypass_destroy_callback)
{
int i;
+
+ f2fs_release_decomp_mem(dic, bypass_destroy_callback, true);
if (dic->tpages) {
for (i = 0; i < dic->cluster_size; i++) {
@@ -1422,7 +1616,7 @@
continue;
f2fs_compress_free_page(dic->tpages[i]);
}
- kfree(dic->tpages);
+ page_array_free(dic->inode, dic->tpages, dic->cluster_size);
}
if (dic->cpages) {
@@ -1431,35 +1625,365 @@
continue;
f2fs_compress_free_page(dic->cpages[i]);
}
- kfree(dic->cpages);
+ page_array_free(dic->inode, dic->cpages, dic->nr_cpages);
}
- kfree(dic->rpages);
- kfree(dic);
+ page_array_free(dic->inode, dic->rpages, dic->nr_rpages);
+ kmem_cache_free(dic_entry_slab, dic);
}
-void f2fs_decompress_end_io(struct page **rpages,
- unsigned int cluster_size, bool err, bool verity)
+static void f2fs_late_free_dic(struct work_struct *work)
+{
+ struct decompress_io_ctx *dic =
+ container_of(work, struct decompress_io_ctx, free_work);
+
+ f2fs_free_dic(dic, false);
+}
+
+static void f2fs_put_dic(struct decompress_io_ctx *dic, bool in_task)
+{
+ if (refcount_dec_and_test(&dic->refcnt)) {
+ if (in_task) {
+ f2fs_free_dic(dic, false);
+ } else {
+ INIT_WORK(&dic->free_work, f2fs_late_free_dic);
+ queue_work(F2FS_I_SB(dic->inode)->post_read_wq,
+ &dic->free_work);
+ }
+ }
+}
+
+/*
+ * Update and unlock the cluster's pagecache pages, and release the reference to
+ * the decompress_io_ctx that was being held for I/O completion.
+ */
+static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed,
+ bool in_task)
{
int i;
- for (i = 0; i < cluster_size; i++) {
- struct page *rpage = rpages[i];
+ for (i = 0; i < dic->cluster_size; i++) {
+ struct page *rpage = dic->rpages[i];
if (!rpage)
continue;
- if (err || PageError(rpage))
- goto clear_uptodate;
-
- if (!verity || fsverity_verify_page(rpage)) {
+ /* PG_error was set if verity failed. */
+ if (failed || PageError(rpage)) {
+ ClearPageUptodate(rpage);
+ /* will re-read again later */
+ ClearPageError(rpage);
+ } else {
SetPageUptodate(rpage);
- goto unlock;
}
-clear_uptodate:
- ClearPageUptodate(rpage);
- ClearPageError(rpage);
-unlock:
unlock_page(rpage);
}
+
+ f2fs_put_dic(dic, in_task);
+}
+
+static void f2fs_verify_cluster(struct work_struct *work)
+{
+ struct decompress_io_ctx *dic =
+ container_of(work, struct decompress_io_ctx, verity_work);
+ int i;
+
+ /* Verify the cluster's decompressed pages with fs-verity. */
+ for (i = 0; i < dic->cluster_size; i++) {
+ struct page *rpage = dic->rpages[i];
+
+ if (rpage && !fsverity_verify_page(rpage))
+ SetPageError(rpage);
+ }
+
+ __f2fs_decompress_end_io(dic, false, true);
+}
+
+/*
+ * This is called when a compressed cluster has been decompressed
+ * (or failed to be read and/or decompressed).
+ */
+void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed,
+ bool in_task)
+{
+ if (!failed && dic->need_verity) {
+ /*
+ * Note that to avoid deadlocks, the verity work can't be done
+ * on the decompression workqueue. This is because verifying
+ * the data pages can involve reading metadata pages from the
+ * file, and these metadata pages may be compressed.
+ */
+ INIT_WORK(&dic->verity_work, f2fs_verify_cluster);
+ fsverity_enqueue_verify_work(&dic->verity_work);
+ } else {
+ __f2fs_decompress_end_io(dic, failed, in_task);
+ }
+}
+
+/*
+ * Put a reference to a compressed page's decompress_io_ctx.
+ *
+ * This is called when the page is no longer needed and can be freed.
+ */
+void f2fs_put_page_dic(struct page *page, bool in_task)
+{
+ struct decompress_io_ctx *dic =
+ (struct decompress_io_ctx *)page_private(page);
+
+ f2fs_put_dic(dic, in_task);
+}
+
+/*
+ * check whether cluster blocks are contiguous, and add extent cache entry
+ * only if cluster blocks are logically and physically contiguous.
+ */
+unsigned int f2fs_cluster_blocks_are_contiguous(struct dnode_of_data *dn)
+{
+ bool compressed = f2fs_data_blkaddr(dn) == COMPRESS_ADDR;
+ int i = compressed ? 1 : 0;
+ block_t first_blkaddr = data_blkaddr(dn->inode, dn->node_page,
+ dn->ofs_in_node + i);
+
+ for (i += 1; i < F2FS_I(dn->inode)->i_cluster_size; i++) {
+ block_t blkaddr = data_blkaddr(dn->inode, dn->node_page,
+ dn->ofs_in_node + i);
+
+ if (!__is_valid_data_blkaddr(blkaddr))
+ break;
+ if (first_blkaddr + i - (compressed ? 1 : 0) != blkaddr)
+ return 0;
+ }
+
+ return compressed ? i - 1 : i;
+}
+
+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 f2fs_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,
+ nid_t ino, block_t blkaddr)
+{
+ struct page *cpage;
+ int ret;
+
+ if (!test_opt(sbi, COMPRESS_CACHE))
+ return;
+
+ if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ))
+ return;
+
+ if (!f2fs_available_free_memory(sbi, COMPRESS_PAGE))
+ return;
+
+ cpage = find_get_page(COMPRESS_MAPPING(sbi), blkaddr);
+ if (cpage) {
+ f2fs_put_page(cpage, 0);
+ return;
+ }
+
+ cpage = alloc_page(__GFP_NOWARN | __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;
+ }
+
+ set_page_private_data(cpage, ino);
+
+ if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ))
+ goto out;
+
+ memcpy(page_address(cpage), page_address(page), PAGE_SIZE);
+ SetPageUptodate(cpage);
+out:
+ f2fs_put_page(cpage, 1);
+}
+
+bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
+ block_t blkaddr)
+{
+ struct page *cpage;
+ bool hitted = false;
+
+ if (!test_opt(sbi, COMPRESS_CACHE))
+ return false;
+
+ 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);
+ hitted = true;
+ }
+ f2fs_put_page(cpage, 1);
+ }
+
+ return hitted;
+}
+
+void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino)
+{
+ struct address_space *mapping = sbi->compress_inode->i_mapping;
+ struct pagevec pvec;
+ pgoff_t index = 0;
+ pgoff_t end = MAX_BLKADDR(sbi);
+
+ if (!mapping->nrpages)
+ return;
+
+ pagevec_init(&pvec);
+
+ do {
+ unsigned int nr_pages;
+ int i;
+
+ nr_pages = pagevec_lookup_range(&pvec, mapping,
+ &index, end - 1);
+ if (!nr_pages)
+ break;
+
+ for (i = 0; i < nr_pages; i++) {
+ struct page *page = pvec.pages[i];
+
+ if (page->index > end)
+ break;
+
+ lock_page(page);
+ if (page->mapping != mapping) {
+ unlock_page(page);
+ continue;
+ }
+
+ if (ino != get_page_private_data(page)) {
+ unlock_page(page);
+ continue;
+ }
+
+ generic_error_remove_page(mapping, page);
+ unlock_page(page);
+ }
+ pagevec_release(&pvec);
+ cond_resched();
+ } while (index < end);
+}
+
+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;
+ char slab_name[32];
+
+ sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev));
+
+ sbi->page_array_slab_size = sizeof(struct page *) <<
+ F2FS_OPTION(sbi).compress_log_size;
+
+ sbi->page_array_slab = f2fs_kmem_cache_create(slab_name,
+ sbi->page_array_slab_size);
+ if (!sbi->page_array_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi)
+{
+ kmem_cache_destroy(sbi->page_array_slab);
+}
+
+static int __init f2fs_init_cic_cache(void)
+{
+ cic_entry_slab = f2fs_kmem_cache_create("f2fs_cic_entry",
+ sizeof(struct compress_io_ctx));
+ if (!cic_entry_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+static void f2fs_destroy_cic_cache(void)
+{
+ kmem_cache_destroy(cic_entry_slab);
+}
+
+static int __init f2fs_init_dic_cache(void)
+{
+ dic_entry_slab = f2fs_kmem_cache_create("f2fs_dic_entry",
+ sizeof(struct decompress_io_ctx));
+ if (!dic_entry_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+static void f2fs_destroy_dic_cache(void)
+{
+ kmem_cache_destroy(dic_entry_slab);
+}
+
+int __init f2fs_init_compress_cache(void)
+{
+ int err;
+
+ err = f2fs_init_cic_cache();
+ if (err)
+ goto out;
+ err = f2fs_init_dic_cache();
+ if (err)
+ goto free_cic;
+ return 0;
+free_cic:
+ f2fs_destroy_cic_cache();
+out:
+ return -ENOMEM;
+}
+
+void f2fs_destroy_compress_cache(void)
+{
+ f2fs_destroy_dic_cache();
+ f2fs_destroy_cic_cache();
}
--
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