[f2fs-dev] [PATCH] f2fs_io: support get_advise command

[f2fs-dev] [PATCH] f2fs_io: support get_advise command

[Chao Yu]

Support get_advise command to get i_advise field value and info
in file.

For example:
f2fs_io get_advise /mnt/f2fs/foo.so
i_advise=0x11, advise_type: cold keep_size

Signed-off-by: Chao Yu <chao@kernel.org>
---
 man/f2fs_io.8           |  3 +++
 tools/f2fs_io/f2fs_io.c | 41 +++++++++++++++++++++++++++++++++++++++++
 tools/f2fs_io/f2fs_io.h |  6 ++++++
 3 files changed, 50 insertions(+)

diff --git a/man/f2fs_io.8 b/man/f2fs_io.8
index ecaab02..f097bde 100644
--- a/man/f2fs_io.8
+++ b/man/f2fs_io.8
@@ -171,6 +171,9 @@ Move a range of data blocks from source file to destination file
 .TP
 \fBgc_range\fR \fI[sync_mode] [start in 4kb] [length in 4kb] [file]\fR
 Trigger gc to move data blocks from specified address range
+.TP
+\fBget_advise\fR \fI[file]\fR
+Get i_advise value and info in file
 .SH AUTHOR
 This version of
 .B f2fs_io
diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index 7059cbf..b8e4f02 100644
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -1743,6 +1743,46 @@ static void do_lseek(int argc, char **argv, const struct cmd_desc *cmd)
 	exit(0);
 }
 
+#define get_advise_desc "get_advise"
+#define get_advise_help "f2fs_io get_advise [file_path]\n\n"
+
+static void do_get_advise(int argc, char **argv, const struct cmd_desc *cmd)
+{
+	int ret;
+	unsigned char value;
+
+	if (argc != 2) {
+		fputs("Excess arguments\n\n", stderr);
+		fputs(cmd->cmd_help, stderr);
+		exit(1);
+	}
+
+	ret = getxattr(argv[1], F2FS_SYSTEM_ADVISE_NAME, &value, sizeof(value));
+	if (ret != sizeof(value)) {
+		perror("getxattr");
+		exit(1);
+	}
+
+	printf("i_advise=0x%x, advise_type: ", value);
+	if (value & FADVISE_COLD_BIT)
+		printf("cold ");
+	if (value & FADVISE_LOST_PINO_BIT)
+		printf("lost_pino ");
+	if (value & FADVISE_ENCRYPT_BIT)
+		printf("encrypt ");
+	if (value & FADVISE_ENC_NAME_BIT)
+		printf("enc_name ");
+	if (value & FADVISE_KEEP_SIZE_BIT)
+		printf("keep_size ");
+	if (value & FADVISE_HOT_BIT)
+		printf("hot ");
+	if (value & FADVISE_VERITY_BIT)
+		printf("verity ");
+	if (value & FADVISE_TRUNC_BIT)
+		printf("trunc ");
+	printf("\n");
+}
+
 #define CMD_HIDDEN 	0x0001
 #define CMD(name) { #name, do_##name, name##_desc, name##_help, 0 }
 #define _CMD(name) { #name, do_##name, NULL, NULL, CMD_HIDDEN }
@@ -1786,6 +1826,7 @@ const struct cmd_desc cmd_list[] = {
 	CMD(setxattr),
 	CMD(removexattr),
 	CMD(lseek),
+	CMD(get_advise),
 	{ NULL, NULL, NULL, NULL, 0 }
 };
 
diff --git a/tools/f2fs_io/f2fs_io.h b/tools/f2fs_io/f2fs_io.h
index d2641cb..b5c82f5 100644
--- a/tools/f2fs_io/f2fs_io.h
+++ b/tools/f2fs_io/f2fs_io.h
@@ -169,7 +169,13 @@ struct fscrypt_get_policy_ex_arg {
 
 #define F2FS_SYSTEM_ADVISE_NAME	"system.advise"
 #define FADVISE_COLD_BIT	0x01
+#define FADVISE_LOST_PINO_BIT	0x02
+#define FADVISE_ENCRYPT_BIT	0x04
+#define FADVISE_ENC_NAME_BIT	0x08
+#define FADVISE_KEEP_SIZE_BIT	0x10
 #define FADVISE_HOT_BIT		0x20
+#define FADVISE_VERITY_BIT	0x40
+#define FADVISE_TRUNC_BIT	0x80
 
 #ifndef FS_IMMUTABLE_FL
 #define FS_IMMUTABLE_FL			0x00000010 /* Immutable file */
-- 
2.40.1



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