Provide long-format help for falloc so that xfstests can use
_require_xfs_io_command to check for falloc command line args.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
io/prealloc.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/io/prealloc.c b/io/prealloc.c
index 713ea7b..7f5c200 100644
--- a/io/prealloc.c
+++ b/io/prealloc.c
@@ -164,6 +164,26 @@ zero_f(
#if defined (HAVE_FALLOCATE)
+static void
+falloc_help(void)
+{
+ printf(_(
+"\n"
+" modifies space associated with part of a file via fallocate"
+"\n"
+" Example:\n"
+" 'falloc 0 1m' - fills all holes within the first megabyte\n"
+"\n"
+" falloc uses the fallocate system call to alter space allocations in the\n"
+" open file. The following operations are supported:\n"
+" All the file offsets are in units of bytes.\n"
+" -c -- collapses the given range.\n"
+" -i -- inserts a hole into the given range of the file.\n"
+" -k -- do not change file size.\n"
+" -p -- unmap the given range from the file.\n"
+"\n"));
+}
+
static int
fallocate_f(
int argc,
@@ -349,6 +369,7 @@ prealloc_init(void)
falloc_cmd.args = _("[-c] [-k] [-p] off len");
falloc_cmd.oneline =
_("allocates space associated with part of a file via fallocate");
+ falloc_cmd.help = falloc_help;
add_command(&falloc_cmd);
fpunch_cmd.name = "fpunch";
--
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