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From ba2963bc57c8c8a3d6f7cc2fd274c9ebd4ddb7d8 Mon Sep 17 00:00:00 2001
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Wed, 6 Jul 2022 12:32:15 +0200
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Subject: [PATCH] convert/convert_linux: complete the remapping of NVMe devices
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In commit 75872bf282d7 ("input: -i vmx: Add support for NVMe devices",
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2022-04-08), we missed that pathnames such as
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/dev/nvme0n1[p1]
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would not match our "rex_device_cciss" and "rex_device" regular
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expressions.
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As a consequence, we don't remap such pathnames now in the boot config
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files with Augeas.
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Add a new regex and associated mapping logic for this kind of pathname.
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Notes:
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(1) "rex_device_cciss" could be extended internally with an alternative
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pattern:
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^/dev/(cciss/c\\d+d\\d+|nvme\\d+n1)(?:p(\\d+))?$
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^^^^^^^^^^^
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but Rich suggested we should add a separate, complete regexp for
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maintainability.
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(2) Even with a separate regexp, we could reuse the existent CCISS pattern
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handler:
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if PCRE.matches rex_device_cciss value ||
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PCRE.matches rex_device_nvme value then (
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let device = PCRE.sub 1
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and part = try PCRE.sub 2 with Not_found -> "" in
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"/dev/" ^ replace device ^ part
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)
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Namely, although "PCRE.matches" creates/updates global state, and
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"PCRE.sub" reads that state, the "||" operator in OCaml has short-circuit
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behavior, and both regexps have the same structure.
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But, using the same maintainability argument, let's keep the handler logic
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for NVMe detached.
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Fixes: 75872bf282d7f2322110caca70963717b43806b1
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2101665
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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Message-Id: <20220706103215.5607-1-lersek@redhat.com>
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Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
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(cherry picked from commit 4368b94ee1724c16aa35c0ee42ce4c51ce037b5a)
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---
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convert/convert_linux.ml | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/convert/convert_linux.ml b/convert/convert_linux.ml
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index 59d143bd..a66ff1e4 100644
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--- a/convert/convert_linux.ml
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+++ b/convert/convert_linux.ml
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@@ -1199,6 +1199,7 @@ let convert (g : G.guestfs) source inspect keep_serial_console _ =
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(* Map device names for each entry. *)
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let rex_resume = PCRE.compile "^resume=(/dev/[-a-z\\d/_]+)(.*)$"
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and rex_device_cciss = PCRE.compile "^/dev/(cciss/c\\d+d\\d+)(?:p(\\d+))?$"
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+ and rex_device_nvme = PCRE.compile "^/dev/(nvme\\d+n1)(?:p(\\d+))?$"
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and rex_device = PCRE.compile "^/dev/([a-z]+)(\\d*)?$" in
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let rec replace_if_device path value =
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@@ -1221,6 +1222,11 @@ let convert (g : G.guestfs) source inspect keep_serial_console _ =
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and part = try PCRE.sub 2 with Not_found -> "" in
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"/dev/" ^ replace device ^ part
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)
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+ else if PCRE.matches rex_device_nvme value then (
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+ let device = PCRE.sub 1
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+ and part = try PCRE.sub 2 with Not_found -> "" in
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+ "/dev/" ^ replace device ^ part
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+ )
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else if PCRE.matches rex_device value then (
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let device = PCRE.sub 1
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and part = try PCRE.sub 2 with Not_found -> "" in
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