Details
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Bug
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Resolution: Done
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P2: Important
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5.13.0
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None
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Linux/Wayland,
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89e0c2854a9dc098380e5286b26de187d04f9826 (qt/qtbase/5.12), 543ae6e6a (dev)
Description
Under linux, QStorageInfo::mountedVolumes uses /proc/self/mountinfo to get information about mounted volumes.
When a docker container is active, all volumes mounted AFTER starting the container and thus appearing after it in mountinfo, are not listed by the function.
The section in /proc/self/mountinfo with the docker volumes looks like this on my machine:
727 26 0:52 / /var/lib/docker/overlay2/f3fbad5eedef71145f00729f0826ea8c44defcfec8c92c58aee0aa2c5ea3fa3a/merged rw,relatime shared:399 - overlay overlay rw,lowerdir=/var/lib/docker/overlay2/l/PUP2PIY4EQLAOEDQOZ56BHVE53:/var/lib/docker/overlay2/l/6IIID3C6J3SUXZEA3GJXKQSTLD:/var/lib/docker/overlay2/l/PA6N6URNR7XDBBGGOSFWSFQ2CG:/var/lib/docker/overlay2/l/5EOMBTZNCPOCE4LM3I4JCTNSTT:/var/lib/docker/overlay2/l/DAMINQ46P3LKX2GDDDIWQKDIWC:/var/lib/docker/overlay2/l/DHR3N57AEH4OG5QER5XJW2LXIN:/var/lib/docker/overlay2/l/NW26KA7QPRS2KSVQI77QJWLMHW,upperdir=/var/lib/docker/overlay2/f3fbad5eedef71145f00729f0826ea8c44defcfec8c92c58aee0aa2c5ea3fa3a/diff,workdir=/var/lib/docker/overlay2/f3fbad5eedef71145f00729f0826ea8c44defc fec8c92c58aee0aa2c5ea3fa3a/work,index=off,xino=off 759 26 0:53 / /var/lib/docker/overlay2/e52b3e97fbf869892d1aeb9b5dd431a5a569130d39395625a1b28876e5f7ca74/merged rw,relatime shared:408 - overlay overlay rw,lowerdir=/var/lib/docker/overlay2/l/M56M6PF5AHG3IJANALB54MUM4K:/var/lib/docker/overlay2/l/AYE3AXKNJFUQGYRJCEP6ITMNXP:/var/lib/docker/overlay2/l/RWPY6A32HWWDFHD7HMX6GXF3KA:/var/lib/docker/overlay2/l/TCKFSNUSNIZE6POZFXKMJLSLOV:/var/lib/docker/overlay2/l/NROE3HY2RUKSYDW7JZWPBTI23Q:/var/lib/docker/overlay2/l/MIRH4XN7L532IJRFJVTNPCJ7R2:/var/lib/docker/overlay2/l/H7VWWCU7YGZOV24JIDZWU7RW2G:/var/lib/docker/overlay2/l/KHY6DCKADSY5Q6EDET2IGDSNX4:/var/lib/docker/overlay2/l/OVB7XQVMWWNHRUPAGMIXB2C4XQ:/var/lib/docker/overlay2/l/QZFOLH5YTIXVZZ4HDAYCYGMRYP:/var/lib/docker/overlay2/l/EJRC54OB6GS44AAX2PTAGJGRZD:/var/lib/docker/overlay2/l/GAGQWJZ3Y6VSM3XAO7S2ILF5CR:/var/lib/docker/overlay2/l/K3UQYRMKDA3A6DFLMZ4PAT4XQU:/var/lib/docker/overlay2/l/D7FSVD767OSRZRU7K4VMHKYT6N:/var/lib/docker/overlay2/l/C5O6KGY4YABFSKCYFF2OGBAZMH,upperdir=/var/lib/docker/overlay2/e52b3e97fbf869892d1aeb9b5dd431a5a569130d39395625a1b28876e5f7ca74/diff,workdir=/var/lib/docker/overlay2/e52b3e97fbf869892d1aeb9b5dd431a5a569130d39395625a1b28876e5f7ca74/work,index=off,xino=off 776 26 0:54 / /var/lib/docker/containers/287743ac032f55d60bed19e553744b39b38525f81af5ba3c4fc051873e9c4b78/mounts/shm rw,nosuid,nodev,noexec,relatime shared:417 - tmpfs shm rw,size=65536k 793 26 0:55 / /var/lib/docker/containers/41db81e991f429f963f72c0092065938354e59f42900d4078204401bc76a5115/mounts/shm rw,nosuid,nodev,noexec,relatime shared:426 - tmpfs shm rw,size=65536k
The last volume, that is listed by mountedVolumes() is
/var/lib/docker/overlay2/e52b3e97fbf869892d1aeb9b5dd431a5a569130d39395625a1b28876e5f7ca74/merged
Everything that comes after it is not listed anymore.
It seems like QStorageInfo gets confused when parsing the docker section.
Attachments
| For Gerrit Dashboard: QTBUG-77059 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 267921,3 | Fix QStorageInfo inability to parse really long mountinfo lines | 5.12 | qt/qtbase | Status: MERGED | +2 | 0 |
| 476346,33 | QStorageInfo/Linux: use readAll() with /proc/self/mountinfo | dev | qt/qtbase | Status: MERGED | +2 | 0 |