ostree/0002-lib-deploy-Add-safety-margin-in-early-prune-space-ch.patch

44 lines
1.7 KiB
Diff

From 261287be37b7af046c31c98b3ca36741b1b421eb Mon Sep 17 00:00:00 2001
From: Jonathan Lebon <jonathan@jlebon.com>
Date: Thu, 4 Jan 2024 11:14:40 -0500
Subject: [PATCH 2/2] lib/deploy: Add safety margin in early prune space check
There are a few things the estimator doesn't account for, e.g. writing
the new BLS entries. Rather than trying to perfect it (since I think we
should change approach entirely -- see previous commit message), just
add a 1M margin to the space check.
---
src/libostree/ostree-sysroot-deploy.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/src/libostree/ostree-sysroot-deploy.c b/src/libostree/ostree-sysroot-deploy.c
index 78c47e76..7f45ccac 100644
--- a/src/libostree/ostree-sysroot-deploy.c
+++ b/src/libostree/ostree-sysroot-deploy.c
@@ -59,6 +59,12 @@
SD_ID128_MAKE (e8, 64, 6c, d6, 3d, ff, 46, 25, b7, 79, 09, a8, e7, a4, 09, 94)
#endif
+/* How much additional space we require available on top of what we accounted
+ * during the early prune fallocate space check. This accounts for anything not
+ * captured directly by `get_kernel_layout_size()` like writing new BLS entries.
+ */
+#define EARLY_PRUNE_SAFETY_MARGIN_SIZE (1 << 20) /* 1 MB */
+
/*
* Like symlinkat() but overwrites (atomically) an existing
* symlink.
@@ -2541,6 +2547,9 @@ dfd_fallocate_check (int dfd, off_t len, gboolean *out_passed, GError **error)
if (!glnx_open_tmpfile_linkable_at (dfd, ".", O_WRONLY | O_CLOEXEC, &tmpf, error))
return FALSE;
+ /* add the safety margin */
+ len += EARLY_PRUNE_SAFETY_MARGIN_SIZE;
+
*out_passed = TRUE;
/* There's glnx_try_fallocate, but not with the same error semantics. */
if (TEMP_FAILURE_RETRY (fallocate (tmpf.fd, 0, 0, len)) < 0)
--
2.43.0