f2fs_io: {set,clear}flags: support nocow flag

This patch supports to set or clear nocow flag in f2fs_io Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
jaegeuk · Oct 21, 2024 · 43d6b66 · 43d6b66
1 parent bce0e1e
commit 43d6b66
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diff --git a/man/f2fs_io.8 b/man/f2fs_io.8
@@ -22,11 +22,11 @@ Get the flags associated with the specified file.
 .TP
 \fBsetflags\fR \fI[flag] [file]\fR
 Set an f2fs file on specified file.  The flag can be casefold,
-compression, nocompression, and immutable.
+compression, nocompression, immutable, and nocow.
 .TP
 \fBclearflags\fR \fI[flag] [file]\fR
 Clear the specified flag on the target file, which can be compression,
- nocompression and immutable.
+ nocompression, immutable, and nocow.
 .TP
 \fBshutdown\fR \fIshutdown filesystem\fR
 Freeze and stop all IOs for the file system mounted on

diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
@@ -318,7 +318,8 @@ static void do_getflags(int argc, char **argv, const struct cmd_desc *cmd)
 "  casefold\n"							\
 "  compression\n"						\
 "  nocompression\n"						\
-"  immutable\n"
+"  immutable\n"							\
+"  nocow\n"
 
 static void do_setflags(int argc, char **argv, const struct cmd_desc *cmd)
 {
@@ -346,6 +347,8 @@ static void do_setflags(int argc, char **argv, const struct cmd_desc *cmd)
 		flag |= FS_NOCOMP_FL;
 	else if (!strcmp(argv[1], "immutable"))
 		flag |= FS_IMMUTABLE_FL;
+	else if (!strcmp(argv[1], "nocow"))
+		flag |= FS_NOCOW_FL;
 
 	ret = ioctl(fd, F2FS_IOC_SETFLAGS, &flag);
 	printf("set a flag on %s ret=%d, flags=%s\n", argv[2], ret, argv[1]);
@@ -359,7 +362,8 @@ static void do_setflags(int argc, char **argv, const struct cmd_desc *cmd)
 "flag can be\n"							\
 "  compression\n"						\
 "  nocompression\n"						\
-"  immutable\n"
+"  immutable\n"							\
+"  nocow\n"
 
 static void do_clearflags(int argc, char **argv, const struct cmd_desc *cmd)
 {
@@ -385,6 +389,8 @@ static void do_clearflags(int argc, char **argv, const struct cmd_desc *cmd)
 		flag &= ~FS_NOCOMP_FL;
 	else if (!strcmp(argv[1], "immutable"))
 		flag &= ~FS_IMMUTABLE_FL;
+	else if (!strcmp(argv[1], "nocow"))
+		flag &= ~FS_NOCOW_FL;
 
 	ret = ioctl(fd, F2FS_IOC_SETFLAGS, &flag);
 	printf("clear a flag on %s ret=%d, flags=%s\n", argv[2], ret, argv[1]);