[PATCH v8 4/11] xfsprogs: xfs_io: add finsert command for insert range

Namjae Jeon
2015-01-13T16:06:08Z

Add finsert command for fallocate FALLOC_FL_INSERT_RANGE flag.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
---
io/prealloc.c | 39 ++++++++++++++++++++++++++++++++++++++-
1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/io/prealloc.c b/io/prealloc.c
index aba6b44..4ab3d8c 100644
--- a/io/prealloc.c
+++ b/io/prealloc.c
@@ -37,6 +37,10 @@
#define FALLOC_FL_ZERO_RANGE 0x10
#endif

+#ifndef FALLOC_FL_INSERT_RANGE
+#define FALLOC_FL_INSERT_RANGE 0x20
+#endif
+
static cmdinfo_t allocsp_cmd;
static cmdinfo_t freesp_cmd;
static cmdinfo_t resvsp_cmd;
@@ -46,6 +50,7 @@ static cmdinfo_t zero_cmd;
static cmdinfo_t falloc_cmd;
static cmdinfo_t fpunch_cmd;
static cmdinfo_t fcollapse_cmd;
+static cmdinfo_t finsert_cmd;
static cmdinfo_t fzero_cmd;
#endif

@@ -169,11 +174,14 @@ fallocate_f(
int mode = 0;
int c;

- while ((c = getopt(argc, argv, "ckp")) != EOF) {
+ while ((c = getopt(argc, argv, "cikp")) != EOF) {
switch (c) {
case 'c':
mode = FALLOC_FL_COLLAPSE_RANGE;
break;
+ case 'i':
+ mode = FALLOC_FL_INSERT_RANGE;
+ break;
case 'k':
mode = FALLOC_FL_KEEP_SIZE;
break;
@@ -237,6 +245,25 @@ fcollapse_f(
}

static int
+finsert_f(
+ int argc,
+ char **argv)
+{
+ xfs_flock64_t segment;
+ int mode = FALLOC_FL_INSERT_RANGE;
+
+ if (!offset_length(argv[1], argv[2], &segment))
+ return 0;
+
+ if (fallocate(file->fd, mode,
+ segment.l_start, segment.l_len)) {
+ perror("fallocate");
+ return 0;
+ }
+ return 0;
+}
+
+static int
fzero_f(
int argc,
char **argv)
@@ -345,6 +372,16 @@ prealloc_init(void)
_("de-allocates space and eliminates the hole by shifting extents");
add_command(&fcollapse_cmd);

+ finsert_cmd.name = "finsert";
+ finsert_cmd.cfunc = finsert_f;
+ finsert_cmd.argmin = 2;
+ finsert_cmd.argmax = 2;
+ finsert_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK;
+ finsert_cmd.args = _("off len");
+ finsert_cmd.oneline =
+ _("creates new space for writing within file by shifting extents");
+ add_command(&finsert_cmd);
+
fzero_cmd.name = "fzero";
fzero_cmd.cfunc = fzero_f;
fzero_cmd.argmin = 2;