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Date: Wed, 4 Nov 2020 08:36:14 +0900
From: Daeho Jeong <daeho43@...il.com>
To: linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com
Cc: Daeho Jeong <daehojeong@...gle.com>
Subject: [PATCH v2] f2fs_io: add get/set compression option
From: Daeho Jeong <daehojeong@...gle.com>
Added new commands, get_coption and set_coption, to support
F2FS_IOC_GET_COMPRESS_OPTION and F2FS_IOC_SET_COMPRESS_OPTION.
Signed-off-by: Daeho Jeong <daehojeong@...gle.com>
---
v2: changed the file open option of set_coption to write only.
---
tools/f2fs_io/f2fs_io.c | 61 +++++++++++++++++++++++++++++++++++++++++
tools/f2fs_io/f2fs_io.h | 9 ++++++
2 files changed, 70 insertions(+)
diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index 5a2d06e..7e6cfd8 100644
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -905,6 +905,65 @@ static void do_reserve_cblocks(int argc, char **argv, const struct cmd_desc *cmd
exit(0);
}
+#define get_coption_desc "get compression option of a compressed file"
+#define get_coption_help \
+"f2fs_io get_coption [file]\n\n" \
+" algorithm : compression algorithm (0:lzo, 1: lz4, 2:zstd, 3:lzorle)\n" \
+" log_cluster_size : compression cluster log size (2 <= log_size <= 8)\n"
+
+static void do_get_coption(int argc, char **argv, const struct cmd_desc *cmd)
+{
+ struct f2fs_comp_option option;
+ int ret, fd;
+
+ if (argc != 2) {
+ fputs("Excess arguments\n\n", stderr);
+ fputs(cmd->cmd_help, stderr);
+ exit(1);
+ }
+
+ fd = xopen(argv[1], O_RDONLY, 0);
+
+ ret = ioctl(fd, F2FS_IOC_GET_COMPRESS_OPTION, &option);
+ if (ret < 0)
+ die_errno("F2FS_IOC_GET_COMPRESS_OPTION failed");
+
+ printf("compression algorithm:%u\n", option.algorithm);
+ printf("compression cluster log size:%u\n", option.log_cluster_size);
+
+ exit(0);
+}
+
+#define set_coption_desc "set compression option of a compressed file"
+#define set_coption_help \
+"f2fs_io set_coption [algorithm] [log_cluster_size] [file_path]\n\n" \
+" algorithm : compression algorithm (0:lzo, 1: lz4, 2:zstd, 3:lzorle)\n" \
+" log_cluster_size : compression cluster log size (2 <= log_size <= 8)\n"
+
+static void do_set_coption(int argc, char **argv, const struct cmd_desc *cmd)
+{
+ struct f2fs_comp_option option;
+ int fd, ret;
+
+ if (argc != 4) {
+ fputs("Excess arguments\n\n", stderr);
+ fputs(cmd->cmd_help, stderr);
+ exit(1);
+ }
+
+ option.algorithm = atoi(argv[1]);
+ option.log_cluster_size = atoi(argv[2]);
+
+ fd = xopen(argv[3], O_WRONLY, 0);
+
+ ret = ioctl(fd, F2FS_IOC_SET_COMPRESS_OPTION, &option);
+ if (ret < 0)
+ die_errno("F2FS_IOC_SET_COMPRESS_OPTION failed");
+
+ printf("set compression option: algorithm=%u, log_cluster_size=%u\n",
+ option.algorithm, option.log_cluster_size);
+ exit(0);
+}
#define CMD_HIDDEN 0x0001
#define CMD(name) { #name, do_##name, name##_desc, name##_help, 0 }
@@ -930,6 +989,8 @@ const struct cmd_desc cmd_list[] = {
CMD(get_cblocks),
CMD(release_cblocks),
CMD(reserve_cblocks),
+ CMD(get_coption),
+ CMD(set_coption),
{ NULL, NULL, NULL, NULL, 0 }
};
diff --git a/tools/f2fs_io/f2fs_io.h b/tools/f2fs_io/f2fs_io.h
index 05d4cfe..cb56e8c 100644
--- a/tools/f2fs_io/f2fs_io.h
+++ b/tools/f2fs_io/f2fs_io.h
@@ -84,6 +84,10 @@ typedef u32 __be32;
_IOR(F2FS_IOCTL_MAGIC, 18, __u64)
#define F2FS_IOC_RESERVE_COMPRESS_BLOCKS \
_IOR(F2FS_IOCTL_MAGIC, 19, __u64)
+#define F2FS_IOC_GET_COMPRESS_OPTION _IOR(F2FS_IOCTL_MAGIC, 21, \
+ struct f2fs_comp_option)
+#define F2FS_IOC_SET_COMPRESS_OPTION _IOW(F2FS_IOCTL_MAGIC, 22, \
+ struct f2fs_comp_option)
#define F2FS_IOC_SET_ENCRYPTION_POLICY FS_IOC_SET_ENCRYPTION_POLICY
#define F2FS_IOC_GET_ENCRYPTION_POLICY FS_IOC_GET_ENCRYPTION_POLICY
@@ -164,3 +168,8 @@ struct f2fs_flush_device {
u32 dev_num; /* device number to flush */
u32 segments; /* # of segments to flush */
};
+
+struct f2fs_comp_option {
+ u8 algorithm;
+ u8 log_cluster_size;
+};
--
2.29.1.341.ge80a0c044ae-goog
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