Add a fpunch command which simply uses fallocate to punch a hole for the
given offset and length.
Signed-off-by: Josef Bacik <josef@xxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
io/prealloc.c | 45 +++++++++++++++++++++++++++++++++++++++++----
1 files changed, 41 insertions(+), 4 deletions(-)
Index: xfsprogs-dev/io/prealloc.c
===================================================================
--- xfsprogs-dev.orig/io/prealloc.c 2011-03-05 00:07:16.000000000 +0000
+++ xfsprogs-dev/io/prealloc.c 2011-03-05 00:10:37.000000000 +0000
@@ -36,6 +36,7 @@ static cmdinfo_t unresvsp_cmd;
static cmdinfo_t zero_cmd;
#if defined(HAVE_FALLOCATE)
static cmdinfo_t falloc_cmd;
+static cmdinfo_t fpunch_cmd;
#endif
static int
@@ -183,7 +184,26 @@ fallocate_f(
}
return 0;
}
-#endif
+
+static int
+fpunch_f(
+ int argc,
+ char **argv)
+{
+ xfs_flock64_t segment;
+ int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE;
+
+ 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;
+}
+#endif /* HAVE_FALLOCATE */
void
prealloc_init(void)
@@ -246,7 +266,16 @@ prealloc_init(void)
falloc_cmd.args = _("[-k] [-p] off len");
falloc_cmd.oneline =
_("allocates space associated with part of a file via fallocate");
-
add_command(&falloc_cmd);
-#endif
+
+ fpunch_cmd.name = _("fpunch");
+ fpunch_cmd.cfunc = fpunch_f;
+ fpunch_cmd.argmin = 2;
+ fpunch_cmd.argmax = 2;
+ fpunch_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK;
+ fpunch_cmd.args = _("off len");
+ fpunch_cmd.oneline =
+ _("de-allocates space assocated with part of a file via fallocate");
+ add_command(&fpunch_cmd);
+#endif /* HAVE_FALLOCATE */
}
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