From d70774de24413f91087e9c3c873cf7a4ec3df813 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Sat, 2 May 2020 13:29:08 +0200 Subject: block: add some basic extroot documentation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Rafał Miłecki --- block.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/block.c b/block.c index dfee7fb..a7631c4 100644 --- a/block.c +++ b/block.c @@ -1374,6 +1374,15 @@ static int test_fs_support(const char *name) return rv; } +/** + * Check if mounted partition is a valid extroot + * + * @path target mount point + * + * Valid extroot partition has to contain /etc/.extroot-uuid with UUID of root + * device. This function reads UUID and verifies it OR writes UUID to + * .extroot-uuid if it doesn't exist yet (first extroot usage). + */ static int check_extroot(char *path) { struct probe_info *pr = NULL; @@ -1528,6 +1537,12 @@ static int mount_extroot(char *cfg) return err; } +/** + * Look for extroot config and mount it if present + * + * Look for /etc/config/fstab on all supported partitions and use it for + * mounting extroot if specified. + */ static int main_extroot(int argc, char **argv) { struct probe_info *pr; @@ -1601,6 +1616,7 @@ static int main_extroot(int argc, char **argv) } #endif + /* As a last resort look for /etc/config/fstab on "rootfs" partition */ return mount_extroot(NULL); } -- cgit v1.2.1