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92 lines
3.6 KiB
92 lines
3.6 KiB
From 6b8fedd82c23f1d8c334c3081a1befebedc40f1f Mon Sep 17 00:00:00 2001 |
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From: Lennart Poettering <lennart@poettering.net> |
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Date: Tue, 19 May 2015 13:50:36 +0200 |
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Subject: [PATCH] mount: don't claim a device is gone from /proc/self/mountinfo |
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before it is gone from *all* lines |
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Devices might be referenced by multiple mount points in |
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/proc/self/mountinfo, hence we should consider them unmounted only after |
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they disappeared from all lines, not just from one. |
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http://lists.freedesktop.org/archives/systemd-devel/2015-May/032026.html |
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(cherry picked from commit fcd8b266edf0df2b85079fcf7b099cd4028740e6) |
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Cherry-picked from: |
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Resolves: #1222517 |
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--- |
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src/core/mount.c | 30 +++++++++++++++++++++++++++--- |
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1 file changed, 27 insertions(+), 3 deletions(-) |
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diff --git a/src/core/mount.c b/src/core/mount.c |
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index fd4fb6f1b..fa63f2426 100644 |
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--- a/src/core/mount.c |
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+++ b/src/core/mount.c |
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@@ -1698,7 +1698,10 @@ fail: |
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} |
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static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
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+ _cleanup_set_free_ Set *around = NULL, *gone = NULL; |
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Manager *m = userdata; |
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+ const char *what; |
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+ Iterator i; |
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Unit *u; |
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int r; |
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@@ -1765,6 +1768,8 @@ static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, |
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if (!mount->is_mounted) { |
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+ /* A mount point is gone */ |
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+ |
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mount->from_proc_self_mountinfo = false; |
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switch (mount->state) { |
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@@ -1780,13 +1785,17 @@ static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, |
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break; |
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} |
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- if (mount->parameters_proc_self_mountinfo.what) |
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- (void) device_found_node(m, mount->parameters_proc_self_mountinfo.what, false, DEVICE_FOUND_MOUNT, true); |
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+ /* Remember that this device might just have disappeared */ |
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+ if (mount->parameters_proc_self_mountinfo.what) { |
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+ if (set_ensure_allocated(&gone, &string_hash_ops) < 0 || |
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+ set_put(gone, mount->parameters_proc_self_mountinfo.what) < 0) |
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+ log_oom(); /* we don't care too much about OOM here... */ |
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+ } |
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} else if (mount->just_mounted || mount->just_changed) { |
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- /* New or changed mount entry */ |
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+ /* A mount point was added or changed */ |
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switch (mount->state) { |
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@@ -1811,12 +1820,27 @@ static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, |
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mount_set_state(mount, mount->state); |
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break; |
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} |
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+ |
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+ if (mount->parameters_proc_self_mountinfo.what) { |
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+ |
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+ if (set_ensure_allocated(&around, &string_hash_ops) < 0 || |
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+ set_put(around, mount->parameters_proc_self_mountinfo.what) < 0) |
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+ log_oom(); |
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+ } |
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} |
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/* Reset the flags for later calls */ |
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mount->is_mounted = mount->just_mounted = mount->just_changed = false; |
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} |
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+ SET_FOREACH(what, gone, i) { |
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+ if (set_contains(around, what)) |
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+ continue; |
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+ |
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+ /* Let the device units know that the device is no longer mounted */ |
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+ (void) device_found_node(m, what, false, DEVICE_FOUND_MOUNT, true); |
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+ } |
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+ |
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return 0; |
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} |
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