Re: [f2fs-dev] [PATCH v3 2/3] f2fs-tools:sload.f2fs compression support
From: Satya Tangirala
Date: Fri Dec 18 2020 - 06:30:39 EST
On Tue, Dec 08, 2020 at 04:15:54PM +0800, Robin Hsu wrote:
> From: Robin Hsu <robinhsu@xxxxxxxxxx>
>
> Add F2FS compression support for sload
> * Support file extension filter, either default-accept or default-deny
> policy
> * Support choice of compression algorithm, LZO (version 2) or LZ4
> (default)
> * Support custom log of cluster size
> * Support minimum number of compressed blocks per cluster (default 1).
> A cluster will not be compressed if the number can not be met.
> * suuport -r (read-only) option
>
> Signed-off-by: Robin Hsu <robinhsu@xxxxxxxxxx>
> ---
> fsck/compress_wrapper.c | 102 ++++++++++++++++++++
> fsck/compress_wrapper.h | 22 +++++
> fsck/fsck.h | 15 +++
> fsck/main.c | 141 +++++++++++++++++++++++++++-
> fsck/segment.c | 202 +++++++++++++++++++++++++++++++++++++---
> fsck/sload.c | 67 +++++++++++++
> include/f2fs_fs.h | 76 ++++++++++++++-
> lib/libf2fs_io.c | 33 +++++++
> 8 files changed, 644 insertions(+), 14 deletions(-)
> create mode 100644 fsck/compress_wrapper.c
> create mode 100644 fsck/compress_wrapper.h
>
> diff --git a/fsck/compress_wrapper.c b/fsck/compress_wrapper.c
> new file mode 100644
> index 0000000..2cdc4fd
> --- /dev/null
> +++ b/fsck/compress_wrapper.c
> @@ -0,0 +1,102 @@
> +/**
> + * compress_wrapper.c
> + *
> + * Copyright (c) 2020 Google Inc.
> + * Robin Hsu <robinhsu@xxxxxxxxxx>
> + * : initial created, for sload compression support
> + *
> + * 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 "f2fs.h" /* for config.h for general environment (non-Android) */
> +
> +#include "compress_wrapper.h"
> +#ifdef HAVE_LIBLZO2
> +#include <lzo/lzo1x.h> /* for lzo1x_1_15_compress() */
> +#endif
> +#ifdef HAVE_LIBLZ4
> +#include <lz4.h> /* for LZ4_compress_fast_extState() */
> +#endif
> +
> +/*
> + * macro/constants borrowed from kernel header (GPL-2.0):
> + * include/linux/lzo.h, and include/linux/lz4.h
> + */
> +#ifdef HAVE_LIBLZO2
> +#define lzo1x_worst_compress(x) ((x) + (x) / 16 + 64 + 3 + 2)
> +#define LZO_WORK_SIZE ALIGN_UP(LZO1X_1_15_MEM_COMPRESS, 8)
> +#endif
> +#ifdef HAVE_LIBLZ4
> +#define LZ4_MEMORY_USAGE 14
> +#define LZ4_MAX_INPUT_SIZE 0x7E000000 /* 2 113 929 216 bytes */
> +#define LZ4_STREAMSIZE (LZ4_STREAMSIZE_U64 * sizeof(long long))
> +#define LZ4_MEM_COMPRESS LZ4_STREAMSIZE
> +#define LZ4_ACCELERATION_DEFAULT 1
> +#define LZ4_WORK_SIZE ALIGN_UP(LZ4_MEM_COMPRESS, 8)
> +#endif
> +
> +#ifdef HAVE_LIBLZO2
> +static void lzo_compress_init(struct compress_ctx *cc)
> +{
> + size_t size = cc->cluster_size * F2FS_BLKSIZE;
> + size_t alloc = size + lzo1x_worst_compress(size)
> + + COMPRESS_HEADER_SIZE + LZO_WORK_SIZE;
> + ASSERT((cc->private = qbuf_alloc(alloc)) != NULL);
> + cc->rbuf = (char *) cc->private + LZO_WORK_SIZE;
> + cc->cbuf = (struct compress_data *)((char *) cc->rbuf + size);
> +}
> +
> +static int lzo_compress(struct compress_ctx *cc)
> +{
> + int ret = lzo1x_1_15_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata,
> + (lzo_uintp)(&cc->clen), cc->private);
> + cc->cbuf->clen = cpu_to_le32(cc->clen);
> + return ret;
> +}
> +#endif
> +
> +#ifdef HAVE_LIBLZ4
> +static void lz4_compress_init(struct compress_ctx *cc)
> +{
> + size_t size = cc->cluster_size * F2FS_BLKSIZE;
> + size_t alloc = size + LZ4_COMPRESSBOUND(size)
> + + COMPRESS_HEADER_SIZE + LZ4_WORK_SIZE;
> + ASSERT((cc->private = qbuf_alloc(alloc)) != NULL);
> + cc->rbuf = (char *) cc->private + LZ4_WORK_SIZE;
> + cc->cbuf = (struct compress_data *)((char *) cc->rbuf + size);
> +}
> +
> +static int lz4_compress(struct compress_ctx *cc)
> +{
> + cc->clen = LZ4_compress_fast_extState(cc->private, cc->rbuf,
> + (char *)cc->cbuf->cdata, cc->rlen,
> + cc->rlen - F2FS_BLKSIZE * c.sldc_min_cbpc,
> + LZ4_ACCELERATION_DEFAULT);
> +
> + if (!cc->clen)
> + return 1;
> +
> + cc->cbuf->clen = cpu_to_le32(cc->clen);
> + return 0;
> +}
> +#endif
> +
> +const char *ca_names[] = {
> + "LZO",
> + "LZ4",
> + "", /* end of the name list */
> +};
> +
> +compress_ops compr_ops[] = {
> +#ifdef HAVE_LIBLZO2
> + {lzo_compress_init, lzo_compress},
> +#else
> + {NULL, NULL},
> +#endif
> +#ifdef HAVE_LIBLZ4
> + {lz4_compress_init, lz4_compress},
> +#else
> + {NULL, NULL},
> +#endif
> +};
> diff --git a/fsck/compress_wrapper.h b/fsck/compress_wrapper.h
> new file mode 100644
> index 0000000..ec33d43
> --- /dev/null
> +++ b/fsck/compress_wrapper.h
> @@ -0,0 +1,22 @@
> +/**
> + * compress_wrapper.h
> + *
> + * Copyright (c) 2020 Google Inc.
> + * Robin Hsu <robinhsu@xxxxxxxxxx>
> + * : initial created, for sload compression support
> + * Copyright (c) 2020 Google Inc.
> + * Robin Hsu <robinhsu@xxxxxxxxxx>
> + * : add sload compression support
> + *
> + * 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.
> + */
> +
> +#ifndef COMPRESS_WRAPPER_H
> +#define COMPRESS_WRAPPER_H
> +
> +#include "f2fs_fs.h"
> +extern compress_ops compr_ops[]; /* [0]: LZO, [1]: LZ4, */
> +
> +#endif /* COMPRESS_WRAPPER_H */
> diff --git a/fsck/fsck.h b/fsck/fsck.h
> index c5e85fe..4e866ec 100644
> --- a/fsck/fsck.h
> +++ b/fsck/fsck.h
> @@ -3,6 +3,9 @@
> *
> * Copyright (c) 2013 Samsung Electronics Co., Ltd.
> * http://www.samsung.com/
> + * Copyright (c) 2020 Google Inc.
> + * Robin Hsu <robinhsu@xxxxxxxxxx>
> + * : add sload compression support
> *
> * 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
> @@ -266,6 +269,9 @@ int f2fs_resize(struct f2fs_sb_info *);
>
> /* sload.c */
> int f2fs_sload(struct f2fs_sb_info *);
> +void sldc_erase_bufs(struct compress_ctx *cc);
> +void sload_countblk(void);
> +extern struct ext_tbl_op ext_filter;
>
> /* segment.c */
> int reserve_new_block(struct f2fs_sb_info *, block_t *,
> @@ -282,7 +288,16 @@ block_t new_node_block(struct f2fs_sb_info *,
> struct quota_file;
> u64 f2fs_quota_size(struct quota_file *);
> u64 f2fs_read(struct f2fs_sb_info *, nid_t, u8 *, u64, pgoff_t);
> +enum wr_addr_type {
> + WR_NORMAL = 1,
> + WR_COMPRESS_DATA = 2,
> + WR_NULL_ADDR = NULL_ADDR, /* 0 */
> + WR_NEW_ADDR = NEW_ADDR, /* -1U */
> + WR_COMPRESS_ADDR = COMPRESS_ADDR, /* -2U */
> +};
> u64 f2fs_write(struct f2fs_sb_info *, nid_t, u8 *, u64, pgoff_t);
> +u64 f2fs_write_compress_data(struct f2fs_sb_info *, nid_t, u8 *, u64, pgoff_t);
> +u64 f2fs_write_addrtag(struct f2fs_sb_info *, nid_t, pgoff_t, unsigned int);
> void f2fs_filesize_update(struct f2fs_sb_info *, nid_t, u64);
>
> int get_dnode_of_data(struct f2fs_sb_info *, struct dnode_of_data *,
> diff --git a/fsck/main.c b/fsck/main.c
> index b20498f..001eed0 100644
> --- a/fsck/main.c
> +++ b/fsck/main.c
> @@ -13,6 +13,9 @@
> * Copyright (c) 2019 Google Inc.
> * Robin Hsu <robinhsu@xxxxxxxxxx>
> * : add cache layer
> + * Copyright (c) 2020 Google Inc.
> + * Robin Hsu <robinhsu@xxxxxxxxxx>
> + * : add sload compression support
> *
> * 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
> @@ -25,6 +28,7 @@
> #include <getopt.h>
> #include <stdbool.h>
> #include "quotaio.h"
> +#include "compress_wrapper.h"
>
> struct f2fs_fsck gfsck;
>
> @@ -134,6 +138,17 @@ void sload_usage()
> MSG(0, " -S sparse_mode\n");
> MSG(0, " -t mount point [prefix of target fs path, default:/]\n");
> MSG(0, " -T timestamp\n");
> + MSG(0, " -c enable compression (default allow policy)\n");
> + MSG(0, " ------------ Compression sub-options -----------------\n");
> + MSG(0, " -L <log-of-blocks-per-cluster>, default 2\n");
> + MSG(0, " -a <algorithm> compression algorithm, default LZ4\n");
> + MSG(0, " -x <ext> compress files except for these extensions.\n");
> + MSG(0, " -i <ext> compress files with these extensions only.\n");
> + MSG(0, " * -i or -x: use it many times for multiple extensions.\n");
> + MSG(0, " * -i and -x cannot be used together..\n");
> + MSG(0, " -m <num> min compressed blocks per cluster\n");
> + MSG(0, " -r readonly (IMMUTABLE) for compressed files\n");
> + MSG(0, " ------------------------------------------------------\n");
> MSG(0, " -d debug level [default:0]\n");
> MSG(0, " -V print the version number and exit\n");
> exit(1);
> @@ -534,7 +549,7 @@ void f2fs_parse_options(int argc, char *argv[])
> #endif
> } else if (!strcmp("sload.f2fs", prog)) {
> #ifdef WITH_SLOAD
> - const char *option_string = "C:d:f:p:s:St:T:V";
> + const char *option_string = "cL:a:i:x:m:rC:d:f:p:s:St:T:V";
> #ifdef HAVE_LIBSELINUX
> int max_nr_opt = (int)sizeof(c.seopt_file) /
> sizeof(c.seopt_file[0]);
> @@ -543,8 +558,82 @@ void f2fs_parse_options(int argc, char *argv[])
> char *p;
>
> c.func = SLOAD;
> + c.sldc_cc.log_cluster_size = 2;
> + c.sldc_ca = CA_LZ4;
> + c.sldc_min_cbpc = 1;
> + c.sldc_ef = &ext_filter;
> while ((option = getopt(argc, argv, option_string)) != EOF) {
> + unsigned int i;
> + int val;
> +
> switch (option) {
> + case 'c': /* compression support */
> + c.sldc_en = true;
> + break;
> + case 'L': /* compression: log of blocks-per-cluster */
> + c.sldc_got_opt = true;
> + val = atoi(optarg);
> + if (val < MIN_COMPRESS_LOG_SIZE ||
> + val > MAX_COMPRESS_LOG_SIZE) {
> + MSG(0, "\tError: log of blocks per"
> + " cluster must be in the range"
> + " of %d .. %d.\n",
> + MIN_COMPRESS_LOG_SIZE,
> + MAX_COMPRESS_LOG_SIZE);
> + error_out(prog);
> + }
> + c.sldc_cc.log_cluster_size = val;
> + break;
> + case 'a': /* compression: choose algorithm */
> + c.sldc_got_opt = true;
> + c.sldc_ca = (u8)-1;
> + for (i = 0; ca_names[i][0] != 0; i++) {
> + if (!strcmp(ca_names[i], optarg)) {
> + c.sldc_ca = i;
> + break;
> + }
> + }
> + if (c.sldc_ca == (u8)-1) {
> + MSG(0, "\tError: Unknown compression"
> + " algorithm %s\n", optarg);
> + error_out(prog);
> + }
> + break;
> + case 'i': /* compress only these extensions */
> + c.sldc_got_opt = true;
> + if (c.sldc_policy == FP_ALLOW) {
> + MSG(0, "\tError: could not mix option"
> + " -i and -x\n");
> + error_out(prog);
> + }
> + c.sldc_policy = FP_DENY;
> + c.sldc_ef->add(optarg);
> + break;
> + case 'x': /* compress except for these extensions */
> + c.sldc_got_opt = true;
> + if (c.sldc_policy == FP_DENY) {
> + MSG(0, "\tError: could not mix option"
> + " -i and -x\n");
> + error_out(prog);
> + }
> + c.sldc_policy = FP_ALLOW;
> + c.sldc_ef->add(optarg);
> + break;
> + case 'm': /* minimum compressed blocks per cluster */
> + c.sldc_got_opt = true;
> + val = atoi(optarg);
> + if (val <= 0) {
> + MSG(0, "\tError: minimum compressed"
> + " blocks per cluster must be"
> + " positive.\n");
> + error_out(prog);
> + }
> + c.sldc_min_cbpc = val;
> + break;
> + case 'r': /* compress file to set IMMUTABLE */
> + c.sldc_got_opt = true;
> + c.sldc_immutable = true;
> + break;
> case 'C':
> c.fs_config_file = absolute_path(optarg);
> break;
> @@ -602,6 +691,27 @@ void f2fs_parse_options(int argc, char *argv[])
> if (err != NOERROR)
> break;
> }
> + if (c.sldc_got_opt && !c.sldc_en) {
> + MSG(0, "\tError: compression sub-options are used"
> + " without the compression enable (-c) option\n"
> + );
> + error_out(prog);
> + }
> + if (err == NOERROR && c.sldc_en) {
> + c.sldc_cc.cluster_size = 1
> + << c.sldc_cc.log_cluster_size;
> + if (c.sldc_policy == FP_UNASSIGNED)
> + c.sldc_policy = FP_ALLOW;
> + if (c.sldc_min_cbpc >= c.sldc_cc.cluster_size) {
> + MSG(0, "\tError: minimum reduced blocks by"
> + " compression per cluster must be at"
> + " most one less than blocks per"
> + " cluster, i.e. %d\n",
> + c.sldc_cc.cluster_size - 1);
> + error_out(prog);
> + }
> + qbuf_init();
> + }
> #endif /* WITH_SLOAD */
> }
>
> @@ -812,6 +922,27 @@ static int do_resize(struct f2fs_sb_info *sbi)
> #endif
>
> #ifdef WITH_SLOAD
> +int init_compr(struct f2fs_sb_info *sbi)
> +{
> + if (!(sbi->raw_super->feature
> + & cpu_to_le32(F2FS_FEATURE_COMPRESSION))) {
> + MSG(0, "Error: Compression (-c) was requested "
> + "but the file system is not created "
> + "with such feature.\n");
> + return -1;
> + }
> + if (compr_ops[c.sldc_ca].init == NULL) {
> + MSG(0, "Error: The selected compression algorithm is not"
> + " supported\n");
> + return -1;
> + }
> + c.sldc_compr = compr_ops + c.sldc_ca;
> + c.sldc_compr->init(&c.sldc_cc);
> + sldc_erase_bufs(&c.sldc_cc);
> + c.sldc_cc.rlen = c.sldc_cc.cluster_size * F2FS_BLKSIZE;
> + return 0;
> +}
> +
> static int do_sload(struct f2fs_sb_info *sbi)
> {
> if (!c.from_dir) {
> @@ -821,6 +952,11 @@ static int do_sload(struct f2fs_sb_info *sbi)
> if (!c.mount_point)
> c.mount_point = "/";
>
> + if (c.sldc_en) {
> + if (init_compr(sbi))
> + return -1;
> + }
> +
> return f2fs_sload(sbi);
> }
> #endif
> @@ -971,6 +1107,9 @@ retry:
> return ret2;
> }
>
> + if (c.func == SLOAD)
> + c.sldc_ef->destroy();
> +
> printf("\nDone: %lf secs\n", (get_boottime_ns() - start) / 1000000000.0);
> return ret;
>
> diff --git a/fsck/segment.c b/fsck/segment.c
> index 0487f41..e4c8cea 100644
> --- a/fsck/segment.c
> +++ b/fsck/segment.c
> @@ -8,6 +8,9 @@
> * Hou Pengyang <houpengyang@xxxxxxxxxx>
> * Liu Shuoran <liushuoran@xxxxxxxxxx>
> * Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
> + * Copyright (c) 2020 Google Inc.
> + * Robin Hsu <robinhsu@xxxxxxxxxx>
> + * : add sload compression support
> *
> * 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
> @@ -16,6 +19,7 @@
> #include "fsck.h"
> #include "node.h"
> #include "quotaio.h"
> +#include "compress_wrapper.h"
>
> int reserve_new_block(struct f2fs_sb_info *sbi, block_t *to,
> struct f2fs_summary *sum, int type, bool is_inode)
> @@ -228,8 +232,14 @@ u64 f2fs_read(struct f2fs_sb_info *sbi, nid_t ino, u8 *buffer,
> return read_count;
> }
>
> -u64 f2fs_write(struct f2fs_sb_info *sbi, nid_t ino, u8 *buffer,
> - u64 count, pgoff_t offset)
> +/*
> + * Do not call this function directly. Instead, call one of the following:
> + * u64 f2fs_write();
> + * u64 f2fs_write_compress_data();
> + * u64 f2fs_write_addrtag();
> + */
> +static u64 f2fs_write_ex(struct f2fs_sb_info *sbi, nid_t ino, u8 *buffer,
> + u64 count, pgoff_t offset, enum wr_addr_type addr_type)
> {
> struct dnode_of_data dn;
> struct node_info ni;
> @@ -243,6 +253,19 @@ u64 f2fs_write(struct f2fs_sb_info *sbi, nid_t ino, u8 *buffer,
> void* index_node = NULL;
> int idirty = 0;
> int err;
> + bool has_data = (addr_type == WR_NORMAL
> + || addr_type == WR_COMPRESS_DATA);
> +
> + if (count == 0)
> + return 0;
> +
> + /*
> + * Enforce calling from f2fs_write(), f2fs_write_compress_data(),
> + * and f2fs_write_addrtag(). Beside, check if is properly called.
> + */
> + ASSERT((!has_data && buffer == NULL) || (has_data && buffer != NULL));
> + if (addr_type != WR_NORMAL)
> + ASSERT(offset % F2FS_BLKSIZE == 0); /* block boundary only */
>
> /* Memory allocation for block buffer and inode. */
> blk_buffer = calloc(BLOCK_SZ, 2);
> @@ -265,15 +288,26 @@ u64 f2fs_write(struct f2fs_sb_info *sbi, nid_t ino, u8 *buffer,
> if (err)
> break;
> idirty |= dn.idirty;
> - if (index_node)
> - free(index_node);
> + free(index_node);
> index_node = (dn.node_blk == dn.inode_blk) ?
> - NULL : dn.node_blk;
> + NULL : dn.node_blk;
> remained_blkentries = ADDRS_PER_PAGE(sbi,
> - dn.node_blk, dn.inode_blk);
> + dn.node_blk, dn.inode_blk) -
> + dn.ofs_in_node;
> }
> ASSERT(remained_blkentries > 0);
>
> + if (!has_data) {
> + dn.data_blkaddr = addr_type;
> + set_data_blkaddr(&dn);
> + idirty |= dn.idirty;
> + if (dn.ndirty)
> + ASSERT(dev_write_block(dn.node_blk,
> + dn.node_blkaddr) >= 0);
> + written_count = 0;
> + break;
> + }
> +
> blkaddr = datablock_addr(dn.node_blk, dn.ofs_in_node);
> if (blkaddr == NULL_ADDR || blkaddr == NEW_ADDR) {
> err = new_data_block(sbi, blk_buffer,
> @@ -281,6 +315,7 @@ u64 f2fs_write(struct f2fs_sb_info *sbi, nid_t ino, u8 *buffer,
> if (err)
> break;
> blkaddr = dn.data_blkaddr;
> + idirty |= dn.idirty;
> }
>
> off_in_blk = offset % BLOCK_SZ;
> @@ -305,9 +340,10 @@ u64 f2fs_write(struct f2fs_sb_info *sbi, nid_t ino, u8 *buffer,
>
> dn.ofs_in_node++;
> if ((--remained_blkentries == 0 || count == 0) && (dn.ndirty))
> - ASSERT(dev_write_block(dn.node_blk, dn.node_blkaddr) >= 0);
> + ASSERT(dev_write_block(dn.node_blk, dn.node_blkaddr)
> + >= 0);
> }
> - if (offset > le64_to_cpu(inode->i.i_size)) {
> + if (addr_type == WR_NORMAL && offset > le64_to_cpu(inode->i.i_size)) {
> inode->i.i_size = cpu_to_le64(offset);
> idirty = 1;
> }
> @@ -315,13 +351,33 @@ u64 f2fs_write(struct f2fs_sb_info *sbi, nid_t ino, u8 *buffer,
> ASSERT(inode == dn.inode_blk);
> ASSERT(write_inode(inode, ni.blk_addr) >= 0);
> }
> - if (index_node)
> - free(index_node);
> +
> + free(index_node);
> free(blk_buffer);
>
> return written_count;
> }
>
> +u64 f2fs_write(struct f2fs_sb_info *sbi, nid_t ino, u8 *buffer,
> + u64 count, pgoff_t offset)
> +{
> + return f2fs_write_ex(sbi, ino, buffer, count, offset, WR_NORMAL);
> +}
> +
> +u64 f2fs_write_compress_data(struct f2fs_sb_info *sbi, nid_t ino, u8 *buffer,
> + u64 count, pgoff_t offset)
> +{
> + return f2fs_write_ex(sbi, ino, buffer, count, offset, WR_COMPRESS_DATA);
> +}
> +
> +u64 f2fs_write_addrtag(struct f2fs_sb_info *sbi, nid_t ino, pgoff_t offset,
> + unsigned int addrtag)
> +{
> + ASSERT(addrtag == COMPRESS_ADDR || addrtag == NEW_ADDR
> + || addrtag == NULL_ADDR);
> + return f2fs_write_ex(sbi, ino, NULL, F2FS_BLKSIZE, offset, addrtag);
> +}
> +
> /* This function updates only inode->i.i_size */
> void f2fs_filesize_update(struct f2fs_sb_info *sbi, nid_t ino, u64 filesize)
> {
> @@ -342,11 +398,59 @@ void f2fs_filesize_update(struct f2fs_sb_info *sbi, nid_t ino, u64 filesize)
> free(inode);
> }
>
> +#define MAX_BULKR_RETRY 5
> +int bulkread(int fd, void *rbuf, size_t rsize, bool *eof)
> +{
> + int n = 0;
> + int retry = MAX_BULKR_RETRY;
> + int cur;
> +
> + if (!rsize)
> + return 0;
> +
> + if (eof != NULL)
> + *eof = false;
> + while (rsize && (cur = read(fd, rbuf, rsize)) != 0) {
> + if (cur == -1) {
> + if (errno == EINTR && retry--)
> + continue;
> + return -1;
> + }
> + retry = MAX_BULKR_RETRY;
> +
> + rsize -= cur;
> + n += cur;
> + }
> + if (eof != NULL)
> + *eof = (cur == 0);
> + return n;
> +}
> +
> +u64 f2fs_fix_mutable(struct f2fs_sb_info *sbi, nid_t ino, pgoff_t offset,
> + unsigned int compressed)
> +{
> + unsigned int i;
> + u64 wlen;
> +
> + if (c.sldc_immutable)
> + return 0;
> +
> + for (i = 0; i < compressed - 1; i++) {
> + wlen = f2fs_write_addrtag(sbi, ino,
> + offset + (i << F2FS_BLKSIZE_BITS), NEW_ADDR);
> + if (wlen)
> + return wlen;
> + }
> + return 0;
> +}
> +
> int f2fs_build_file(struct f2fs_sb_info *sbi, struct dentry *de)
> {
> int fd, n;
> pgoff_t off = 0;
> u8 buffer[BLOCK_SZ];
> + struct node_info ni;
> + struct f2fs_node *node_blk;
>
> if (de->ino == 0)
> return -1;
> @@ -359,8 +463,6 @@ int f2fs_build_file(struct f2fs_sb_info *sbi, struct dentry *de)
>
> /* inline_data support */
> if (de->size <= DEF_MAX_INLINE_DATA) {
> - struct node_info ni;
> - struct f2fs_node *node_blk;
> int ret;
>
> get_node_info(sbi, de->ino, &ni);
> @@ -385,6 +487,82 @@ int f2fs_build_file(struct f2fs_sb_info *sbi, struct dentry *de)
> node_blk->i.i_size = cpu_to_le64(de->size);
> ASSERT(write_inode(node_blk, ni.blk_addr) >= 0);
> free(node_blk);
> +#ifdef WITH_SLOAD
> + } else if (c.func == SLOAD && c.sldc_en &&
> + c.sldc_ef->filter(de->full_path)) {
> + bool eof = false;
> + u8 *rbuf = c.sldc_cc.rbuf;
> + unsigned int cblocks = 0;
> +
> + node_blk = calloc(BLOCK_SZ, 1);
> + ASSERT(node_blk);
> +
> + /* read inode */
> + get_node_info(sbi, de->ino, &ni);
> + ASSERT(dev_read_block(node_blk, ni.blk_addr) >= 0);
> + /* update inode meta */
> + node_blk->i.i_compress_algrithm = c.sldc_ca;
> + node_blk->i.i_log_cluster_size =
> + c.sldc_cc.log_cluster_size;
> + node_blk->i.i_flags = cpu_to_le32(
> + F2FS_COMPR_FL |
> + (c.sldc_immutable ? FS_IMMUTABLE_FL : 0));
> + ASSERT(write_inode(node_blk, ni.blk_addr) >= 0);
> +
> + while (!eof && (n = bulkread(fd, rbuf, c.sldc_cc.rlen,
> + &eof)) > 0) {
> + int ret = c.sldc_compr->compress(&c.sldc_cc);
> + u64 wlen;
> + u32 csize = ALIGN_UP(c.sldc_cc.clen +
> + COMPRESS_HEADER_SIZE, BLOCK_SZ);
> + unsigned int cur_cblk;
> +
> + if (ret || n < (int)(csize + BLOCK_SZ *
> + c.sldc_min_cbpc)) {
> + wlen = f2fs_write(sbi, de->ino, rbuf, n, off);
> + ASSERT((int)wlen == n);
> + } else {
> + wlen = f2fs_write_addrtag(sbi, de->ino, off,
> + WR_COMPRESS_ADDR);
> + ASSERT(!wlen);
> + wlen = f2fs_write_compress_data(sbi, de->ino,
> + (u8 *)c.sldc_cc.cbuf,
> + csize, off + BLOCK_SZ);
> + ASSERT(wlen == csize);
> + sldc_erase_bufs(&c.sldc_cc);
> + cur_cblk = (c.sldc_cc.rlen - csize) / BLOCK_SZ;
> + cblocks += cur_cblk;
> + wlen = f2fs_fix_mutable(sbi, de->ino,
> + off + BLOCK_SZ + csize,
> + cur_cblk);
> + ASSERT(!wlen);
> + }
> + off += n;
> + }
> + if (n == -1) {
> + fprintf(stderr, "Load file '%s' failed: ",
> + de->full_path);
> + perror(NULL);
> + }
> + /* read inode */
> + get_node_info(sbi, de->ino, &ni);
> + ASSERT(dev_read_block(node_blk, ni.blk_addr) >= 0);
> + /* update inode meta */
> + node_blk->i.i_size = cpu_to_le64(off);
> + if (!c.sldc_immutable)
> + node_blk->i.i_compr_blocks = cpu_to_le64(cblocks);
> + ASSERT(write_inode(node_blk, ni.blk_addr) >= 0);
> + free(node_blk);
> +
> + if (!c.sldc_immutable) {
> + sbi->total_valid_block_count += cblocks;
> + if (sbi->total_valid_block_count >=
> + sbi->user_block_count) {
> + ERR_MSG("Not enough space\n");
> + ASSERT(0);
> + }
> + }
> +#endif
> } else {
> while ((n = read(fd, buffer, BLOCK_SZ)) > 0) {
> f2fs_write(sbi, de->ino, buffer, n, off);
> diff --git a/fsck/sload.c b/fsck/sload.c
> index 14012fb..13e523a 100644
> --- a/fsck/sload.c
> +++ b/fsck/sload.c
> @@ -6,6 +6,9 @@
> * Hou Pengyang <houpengyang@xxxxxxxxxx>
> * Liu Shuoran <liushuoran@xxxxxxxxxx>
> * Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
> + * Copyright (c) 2020 Google Inc.
> + * Robin Hsu <robinhsu@xxxxxxxxxx>
> + * : add sload compression support
> *
> * 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
> @@ -317,6 +320,70 @@ skip:
> return 0;
> }
>
> +typedef struct _ext_tbl {
> + const char *ext;
> + struct _ext_tbl *next; /* linked list */
> +} ext_tbl_t;
> +static ext_tbl_t *ext_tbl;
> +
> +static bool ext_found(const char *ext)
> +{
> + ext_tbl_t *p = ext_tbl;
> +
> + while (p != NULL && strcmp(ext, p->ext))
> + p = p->next;
> + return (p != NULL);
> +}
> +
> +static const char *get_ext(const char *path)
> +{
> + char *p = strrchr(path, '.');
> + return p == NULL ? path + strlen(path) : p + 1;
> +}
> +
> +static bool ext_do_filter(const char *path)
> +{
> + return (ext_found(get_ext(path)) == true) ^ (c.sldc_policy == FP_ALLOW);
> +}
> +
> +static void ext_filter_add(const char *ext)
> +{
> + ext_tbl_t *node;
> +
> + ASSERT(ext != NULL);
> + if (ext_found(ext))
> + return; /* ext was already registered */
> + node = malloc(sizeof(ext_tbl_t));
> + ASSERT(node != NULL);
> + node->ext = ext;
> + node->next = ext_tbl;
> + ext_tbl = node;
> +}
> +
> +static void ext_filter_destroy(void)
> +{
> + ext_tbl_t *p;
> +
> + while (ext_tbl != NULL) {
> + p = ext_tbl;
> + ext_tbl = p->next;
> + free(p);
> + }
> +}
> +
> +struct ext_tbl_op ext_filter = {
> + .add = ext_filter_add,
> + .destroy = ext_filter_destroy,
> + .filter = ext_do_filter,
> +};
> +
> +void sldc_erase_bufs(struct compress_ctx *cc)
> +{
> + memset(cc->rbuf, 0, cc->cluster_size * F2FS_BLKSIZE);
> + memset(cc->cbuf->cdata, 0, cc->cluster_size * F2FS_BLKSIZE
> + - F2FS_BLKSIZE);
> +}
> +
> int f2fs_sload(struct f2fs_sb_info *sbi)
> {
> int ret = 0;
> diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
> index 1348e39..2a2dc15 100644
> --- a/include/f2fs_fs.h
> +++ b/include/f2fs_fs.h
> @@ -5,6 +5,9 @@
> * http://www.samsung.com/
> * Copyright (c) 2019 Google Inc.
> * http://www.google.com/
> + * Copyright (c) 2020 Google Inc.
> + * Robin Hsu <robinhsu@xxxxxxxxxx>
> + * : add sload compression support
> *
> * Dual licensed under the GPL or LGPL version 2 licenses.
> *
> @@ -68,6 +71,10 @@ typedef uint16_t u_int16_t;
> typedef uint8_t u_int8_t;
> #endif
>
> +/* codes from kernel's f2fs.h, GPL-v2.0 */
> +#define MIN_COMPRESS_LOG_SIZE 2
> +#define MAX_COMPRESS_LOG_SIZE 8
> +
> typedef u_int64_t u64;
> typedef u_int32_t u32;
> typedef u_int16_t u16;
> @@ -93,6 +100,31 @@ typedef u32 __be32;
> typedef u64 __be64;
> #endif
>
> +/*
> + * code borrowed from kernel f2fs dirver: f2fs.h, GPL-2.0
> + * : definitions of COMPRESS_DATA_RESERVED_SIZE,
> + * struct compress_data, COMPRESS_HEADER_SIZE,
> + * and struct compress_ctx
> + */
> +#define COMPRESS_DATA_RESERVED_SIZE 4
> +struct compress_data {
> + __le32 clen; /* compressed data size */
> + __le32 chksum; /* checksum of compressed data */
> + __le32 reserved[COMPRESS_DATA_RESERVED_SIZE]; /* reserved */
> + u8 cdata[]; /* compressed data */
> +};
> +#define COMPRESS_HEADER_SIZE (sizeof(struct compress_data))
> +/* compress context */
> +struct compress_ctx {
> + unsigned int cluster_size; /* page count in cluster */
> + unsigned int log_cluster_size; /* log of cluster size */
> + void *rbuf; /* compression input buffer */
> + struct compress_data *cbuf; /* comprsssion output header + data */
> + size_t rlen; /* valid data length in rbuf */
> + size_t clen; /* valid data length in cbuf */
> + void *private; /* work buf for compress algorithm */
> +};
> +
> #if HAVE_BYTESWAP_H
> #include <byteswap.h>
> #else
> @@ -345,6 +377,25 @@ typedef struct {
> bool dbg_en;
> } dev_cache_config_t;
>
> +/* f2fs_configration: sldc_ca, the sload compress algorithm */
> +enum {CA_LZO, CA_LZ4};
> +extern const char *ca_names[];
> +
> +typedef struct {
> + void (*init)(struct compress_ctx *cc);
> + int (*compress)(struct compress_ctx *cc);
> +} compress_ops;
> +
> +#define ALIGN_UP(value, size) ((value) + ((value) % (size) > 0 ? \
> + (size) - (value) % (size) : 0))
> +
> +enum filter_policy {FP_UNASSIGNED = 0, FP_ALLOW, FP_DENY};
> +struct ext_tbl_op {
> + void (*add)(const char *);
> + void (*destroy)(void);
> + bool (*filter)(const char *);
> +};
> +
> struct f2fs_configuration {
> u_int32_t reserved_segments;
> u_int32_t new_reserved_segments;
> @@ -441,6 +492,24 @@ struct f2fs_configuration {
>
> /* cache parameters */
> dev_cache_config_t cache_config;
> +
> + /* quick dynamic buffer */
> + bool qbuf_initialized;
> + size_t qbufsize;
> + void *qbuf;
I don't think these qbuf* variables inside the f2fs_configuration are
used anywhere - shouldn't they be removed?
> +
> + /* sldc: sload compression support */
> + bool sldc_en;
> + bool sldc_use_allow_list; /* default false to use the deny list */
> + struct compress_ctx sldc_cc;
> + u8 sldc_ca; /* compress algorithm: 0 = LZO, 1 = LZ4 */
> + compress_ops *sldc_compr;
> + enum filter_policy sldc_policy;
> + /* max_cppc can used to specify minimum compression rate */
> + unsigned int sldc_min_cbpc; /* min compressed pages per cluster */
> + bool sldc_got_opt;
> + bool sldc_immutable;
> + struct ext_tbl_op *sldc_ef; /* extension filter */
> };
>
> #ifdef CONFIG_64BIT
> @@ -1226,6 +1295,11 @@ extern void f2fs_release_sparse_resource(void);
> extern int f2fs_finalize_device(void);
> extern int f2fs_fsync_device(void);
>
> +/* quick (shared) buffer */
> +extern void qbuf_free(void);
> +extern void *qbuf_alloc(size_t size);
> +extern void qbuf_init(void);
> +
> extern void dcache_init(void);
> extern void dcache_release(void);
>
> @@ -1377,7 +1451,7 @@ int f2fs_reset_zone(int, void *);
> extern int f2fs_reset_zones(int);
> extern uint32_t f2fs_get_usable_segments(struct f2fs_super_block *sb);
>
> -#define SIZE_ALIGN(val, size) ((val) + (size) - 1) / (size)
> +#define SIZE_ALIGN(val, size) (((val) + (size) - 1) / (size))
> #define SEG_ALIGN(blks) SIZE_ALIGN(blks, c.blks_per_seg)
> #define ZONE_ALIGN(blks) SIZE_ALIGN(blks, c.blks_per_seg * \
> c.segs_per_zone)
> diff --git a/lib/libf2fs_io.c b/lib/libf2fs_io.c
> index 138285d..0280896 100644
> --- a/lib/libf2fs_io.c
> +++ b/lib/libf2fs_io.c
> @@ -5,6 +5,9 @@
> * http://www.samsung.com/
> * Copyright (c) 2019 Google Inc.
> * http://www.google.com/
> + * Copyright (c) 2020 Google Inc.
> + * Robin Hsu <robinhsu@xxxxxxxxxx>
> + * : add quick-buffer for sload compression support
> *
> * Dual licensed under the GPL or LGPL version 2 licenses.
> */
> @@ -106,6 +109,36 @@ static long dcache_relocate_offset0[] = {
> };
> static int dcache_relocate_offset[16];
>
> +/* quick (shared) buffer */
> +static bool qbuf_initialized;
> +static void *qbuf;
> +static size_t qbufsize;
> +void qbuf_free(void)
> +{
> + ASSERT(qbuf_initialized);
> + if (qbuf != NULL) {
> + free(qbuf);
> + qbuf = NULL;
> + qbufsize = 0;
> + }
> +}
> +void *qbuf_alloc(size_t size)
> +{
> + ASSERT(qbuf_initialized);
> + if (size > qbufsize) {
> + qbuf_free();
> + qbuf = malloc(size);
qbufsize needs to be updated to size here.
> + }
> + return qbuf;
> +}
> +void qbuf_init(void)
> +{
> + if (qbuf_initialized)
> + return;
> + atexit(qbuf_free);
> + qbuf_initialized = true;
> +}
Is there really a need for all this qbuf code? As far as I can tell,
qbuf_alloc() is only ever called once during any invocation of
sload, and it'd be better/simpler to replace that with a malloc()...
> +
> static void dcache_print_statistics(void)
> {
> long i;
> --
> 2.29.2.576.ga3fc446d84-goog
>
>
>
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