From: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
This allows to make pwritev2() calls with RWF_NOWAIT,
which would fail in case the call blocks.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
Changes since v2:
- ifdef around -N which set RWF_NOWAIT
---
io/pwrite.c | 10 +++++++++-
man/man8/xfs_io.8 | 6 ++++++
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/io/pwrite.c b/io/pwrite.c
index 5ceb26c7..e06dfb46 100644
--- a/io/pwrite.c
+++ b/io/pwrite.c
@@ -53,6 +53,9 @@ pwrite_help(void)
#ifdef HAVE_PWRITEV
" -V N -- use vectored IO with N iovecs of blocksize each (pwritev)\n"
#endif
+#ifdef HAVE_PWRITEV2
+" -N -- Perform the pwritev2() with RWF_NOWAIT\n"
+#endif
"\n"));
}
@@ -279,7 +282,7 @@ pwrite_f(
init_cvtnum(&fsblocksize, &fssectsize);
bsize = fsblocksize;
- while ((c = getopt(argc, argv, "b:BCdf:Fi:qRs:S:uV:wWZ:")) != EOF) {
+ while ((c = getopt(argc, argv, "b:BCdf:Fi:NqRs:S:uV:wWZ:")) != EOF) {
switch (c) {
case 'b':
tmp = cvtnum(fsblocksize, fssectsize, optarg);
@@ -308,6 +311,11 @@ pwrite_f(
case 'i':
infile = optarg;
break;
+#ifdef HAVE_PWRITEV2
+ case 'N':
+ pwritev2_flags |= RWF_NOWAIT;
+ break;
+#endif
case 's':
skip = cvtnum(fsblocksize, fssectsize, optarg);
if (skip < 0) {
diff --git a/man/man8/xfs_io.8 b/man/man8/xfs_io.8
index 0fd9b951..9c58914f 100644
--- a/man/man8/xfs_io.8
+++ b/man/man8/xfs_io.8
@@ -282,6 +282,12 @@ Use the vectored IO write syscall
with a number of blocksize length iovecs. The number of iovecs is set by the
.I vectors
parameter.
+.TP
+.B \-N
+Perform the
+.BR pwritev2 (2)
+call with
+.I RWF_NOWAIT.
.RE
.PD
.TP
--
2.14.2
--
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