filesystem: support ext4 super block emergency_ro flag#3717
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Since Linux 6.15, the ext4 superblock exposes the 'emergency_ro' flag when 'errors=remount-ro' has been triggered. The 'ro' flag is no longer set on the super block in this case since Linux 6.12. reference: - torvalds/linux@6b76715d5e41f - torvalds/linux@d3476f3dad4ad This commit will allow reporting an ext4 filesystem as read-only, for Linux 6.15+. Hosts with a version between 6.12 and 6.15 or with a backport of the 6.12 fix will still report an 'emergency_ro' filesystem as read-write. This was tested manually with a 6.18.x Kernel using a 'flakey' device mapper overlay for fault injection. Signed-off-by: Jean-Tiare Le Bigot <jean-tiare.lebigot@exoscale.ch>
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@SuperQ, @discordianfish Could you have a look? Thanks! |
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Thanks for the kernel source references, it helps. |
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* [FEATURE] mountstats: Add NFS mountpoint info metric #3554 * [FEATURE] nvmesubsystem: Add new collector #3579 * [FEATURE] dmmultipath: Add new collector #3581 * [FEATURE] infiniband: Add device filtering option #3694 * [ENHANCEMENT] hwmon: disambiguate colliding chip labels #3646 * [ENHANCEMENT] cpufreq: Add support for cpuinfo_avg_freq #3712 * [ENHANCEMENT] filesystem: Support ext4 super block emergency_ro flag #3717 * [ENHANCEMENT] edac: Add per-channel error metrics with DIMM labels #3720 * [BUGFIX] diskstats: Only enforce mutual exclusivity for non-empty values #3617 * [BUGFIX] thermal_zone: Handle EINVAL errors gracefully #3657 * [BUGFIX] filesystem: Add comma separator in mount options #3659 * [BUGFIX] diskstats: Fix rotational queue stats scrape regression #3686 * [BUGFIX] filesystem: Prevent panic on mount points with non-UTF-8 names #3687 Signed-off-by: Ben Kochie <superq@gmail.com>
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….1 ➔ v1.12.0) (#297) This PR contains the following updates: | Package | Update | Change | |---|---|---| | [quay.io/prometheus/node-exporter](https://github.com/prometheus/node_exporter) | minor | `v1.11.1` → `v1.12.0` | --- ### Release Notes <details> <summary>prometheus/node_exporter (quay.io/prometheus/node-exporter)</summary> ### [`v1.12.0`](https://github.com/prometheus/node_exporter/releases/tag/v1.12.0): 1.12.0 / 2026-07-10 [Compare Source](prometheus/node_exporter@v1.11.1...v1.12.0) - \[FEATURE] mountstats: Add NFS mountpoint info metric [#​3554](prometheus/node_exporter#3554) - \[FEATURE] nvmesubsystem: Add new collector [#​3579](prometheus/node_exporter#3579) - \[FEATURE] dmmultipath: Add new collector [#​3581](prometheus/node_exporter#3581) - \[FEATURE] infiniband: Add device filtering option [#​3694](prometheus/node_exporter#3694) - \[ENHANCEMENT] hwmon: disambiguate colliding chip labels [#​3646](prometheus/node_exporter#3646) - \[ENHANCEMENT] cpufreq: Add support for cpuinfo\_avg\_freq [#​3712](prometheus/node_exporter#3712) - \[ENHANCEMENT] filesystem: Support ext4 super block emergency\_ro flag [#​3717](prometheus/node_exporter#3717) - \[ENHANCEMENT] edac: Add per-channel error metrics with DIMM labels [#​3720](prometheus/node_exporter#3720) - \[BUGFIX] diskstats: Only enforce mutual exclusivity for non-empty values [#​3617](prometheus/node_exporter#3617) - \[BUGFIX] thermal\_zone: Handle EINVAL errors gracefully [#​3657](prometheus/node_exporter#3657) - \[BUGFIX] filesystem: Add comma separator in mount options [#​3659](prometheus/node_exporter#3659) - \[BUGFIX] diskstats: Fix rotational queue stats scrape regression [#​3686](prometheus/node_exporter#3686) - \[BUGFIX] filesystem: Prevent panic on mount points with non-UTF-8 names [#​3687](prometheus/node_exporter#3687) </details> --- ### Configuration 📅 **Schedule**: (in timezone Europe/Warsaw) - Branch creation - At any time (no schedule defined) - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about these updates again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4yNTcuNCIsInVwZGF0ZWRJblZlciI6IjQzLjI1Ny40IiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbInJlbm92YXRlL2NvbnRhaW5lciIsInR5cGUvbWlub3IiXX0=--> Reviewed-on: https://git.ajgon.casa/deedee/mark13/pulls/297
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….1 ➔ v1.12.0) (#1526) This PR contains the following updates: | Package | Update | Change | |---|---|---| | [quay.io/prometheus/node-exporter](https://github.com/prometheus/node_exporter) | minor | `v1.11.1` → `v1.12.0` | --- ### Release Notes <details> <summary>prometheus/node_exporter (quay.io/prometheus/node-exporter)</summary> ### [`v1.12.0`](https://github.com/prometheus/node_exporter/releases/tag/v1.12.0): 1.12.0 / 2026-07-10 [Compare Source](prometheus/node_exporter@v1.11.1...v1.12.0) - \[FEATURE] mountstats: Add NFS mountpoint info metric [#​3554](prometheus/node_exporter#3554) - \[FEATURE] nvmesubsystem: Add new collector [#​3579](prometheus/node_exporter#3579) - \[FEATURE] dmmultipath: Add new collector [#​3581](prometheus/node_exporter#3581) - \[FEATURE] infiniband: Add device filtering option [#​3694](prometheus/node_exporter#3694) - \[ENHANCEMENT] hwmon: disambiguate colliding chip labels [#​3646](prometheus/node_exporter#3646) - \[ENHANCEMENT] cpufreq: Add support for cpuinfo\_avg\_freq [#​3712](prometheus/node_exporter#3712) - \[ENHANCEMENT] filesystem: Support ext4 super block emergency\_ro flag [#​3717](prometheus/node_exporter#3717) - \[ENHANCEMENT] edac: Add per-channel error metrics with DIMM labels [#​3720](prometheus/node_exporter#3720) - \[BUGFIX] diskstats: Only enforce mutual exclusivity for non-empty values [#​3617](prometheus/node_exporter#3617) - \[BUGFIX] thermal\_zone: Handle EINVAL errors gracefully [#​3657](prometheus/node_exporter#3657) - \[BUGFIX] filesystem: Add comma separator in mount options [#​3659](prometheus/node_exporter#3659) - \[BUGFIX] diskstats: Fix rotational queue stats scrape regression [#​3686](prometheus/node_exporter#3686) - \[BUGFIX] filesystem: Prevent panic on mount points with non-UTF-8 names [#​3687](prometheus/node_exporter#3687) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about these updates again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4xMDEuMSIsInVwZGF0ZWRJblZlciI6IjQzLjEwMS4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJyZW5vdmF0ZS9jb250YWluZXIiLCJ0eXBlL21pbm9yIl19--> Reviewed-on: https://git.erwanleboucher.dev/eleboucher/homelab/pulls/1526
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Jul 12, 2026
….12.0 (#511) This PR contains the following updates: | Package | Update | Change | |---|---|---| | [quay.io/prometheus/node-exporter](https://github.com/prometheus/node_exporter) | minor | `v1.11.1` → `v1.12.0` | --- ### Release Notes <details> <summary>prometheus/node_exporter (quay.io/prometheus/node-exporter)</summary> ### [`v1.12.0`](https://github.com/prometheus/node_exporter/releases/tag/v1.12.0): 1.12.0 / 2026-07-10 [Compare Source](prometheus/node_exporter@v1.11.1...v1.12.0) - \[FEATURE] mountstats: Add NFS mountpoint info metric [#​3554](prometheus/node_exporter#3554) - \[FEATURE] nvmesubsystem: Add new collector [#​3579](prometheus/node_exporter#3579) - \[FEATURE] dmmultipath: Add new collector [#​3581](prometheus/node_exporter#3581) - \[FEATURE] infiniband: Add device filtering option [#​3694](prometheus/node_exporter#3694) - \[ENHANCEMENT] hwmon: disambiguate colliding chip labels [#​3646](prometheus/node_exporter#3646) - \[ENHANCEMENT] cpufreq: Add support for cpuinfo\_avg\_freq [#​3712](prometheus/node_exporter#3712) - \[ENHANCEMENT] filesystem: Support ext4 super block emergency\_ro flag [#​3717](prometheus/node_exporter#3717) - \[ENHANCEMENT] edac: Add per-channel error metrics with DIMM labels [#​3720](prometheus/node_exporter#3720) - \[BUGFIX] diskstats: Only enforce mutual exclusivity for non-empty values [#​3617](prometheus/node_exporter#3617) - \[BUGFIX] thermal\_zone: Handle EINVAL errors gracefully [#​3657](prometheus/node_exporter#3657) - \[BUGFIX] filesystem: Add comma separator in mount options [#​3659](prometheus/node_exporter#3659) - \[BUGFIX] diskstats: Fix rotational queue stats scrape regression [#​3686](prometheus/node_exporter#3686) - \[BUGFIX] filesystem: Prevent panic on mount points with non-UTF-8 names [#​3687](prometheus/node_exporter#3687) </details> --- ### Configuration 📅 **Schedule**: (UTC) - Branch creation - At any time (no schedule defined) - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4yNTIuMSIsInVwZGF0ZWRJblZlciI6IjQzLjI1Mi4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->
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Since Linux 6.15, the ext4 superblock exposes the 'emergency_ro' flag when 'errors=remount-ro' has been triggered. The 'ro' flag is no longer set on the super block in this case since Linux 6.12.
reference:
This commit will allow reporting an ext4 filesystem as read-only, for Linux 6.15+. Hosts with a version between 6.12 and 6.15 or with a backport of the 6.12 fix will still report an 'emergency_ro' filesystem as read-write.
This was tested manually with a 6.18.x Kernel using a 'flakey' device mapper overlay for fault injection.