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authorLinus Torvalds <torvalds@linux-foundation.org>2020-03-25 10:34:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-03-25 10:34:02 -0700
commite2cf67f6689a218b4d8e606e90a12491a9cfa366 (patch)
tree8e50bab425836a5386229a95edd42a9c2999c50f /Documentation/filesystems
parent76ccd234269bd05debdbc12c96eafe62dd9a6180 (diff)
parentccf4ad7da0d9c30a962a116cb55bcd7d8c44b0fe (diff)
downloadlinux-e2cf67f6689a218b4d8e606e90a12491a9cfa366.tar.bz2
Merge tag 'zonefs-5.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs
Pull zonefs fix from Damien Le Moal: "A single fix from me to correctly handle the size of read-only zone files" * tag 'zonefs-5.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs: zonfs: Fix handling of read-only zones
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/zonefs.txt18
1 files changed, 13 insertions, 5 deletions
diff --git a/Documentation/filesystems/zonefs.txt b/Documentation/filesystems/zonefs.txt
index d54fa98ac158..78813c34ec47 100644
--- a/Documentation/filesystems/zonefs.txt
+++ b/Documentation/filesystems/zonefs.txt
@@ -258,11 +258,11 @@ conditions.
| option | condition | size read write read write |
+--------------+-----------+-----------------------------------------+
| | good | fixed yes no yes yes |
- | remount-ro | read-only | fixed yes no yes no |
+ | remount-ro | read-only | as is yes no yes no |
| (default) | offline | 0 no no no no |
+--------------+-----------+-----------------------------------------+
| | good | fixed yes no yes yes |
- | zone-ro | read-only | fixed yes no yes no |
+ | zone-ro | read-only | as is yes no yes no |
| | offline | 0 no no no no |
+--------------+-----------+-----------------------------------------+
| | good | 0 no no yes yes |
@@ -270,7 +270,7 @@ conditions.
| | offline | 0 no no no no |
+--------------+-----------+-----------------------------------------+
| | good | fixed yes yes yes yes |
- | repair | read-only | fixed yes no yes no |
+ | repair | read-only | as is yes no yes no |
| | offline | 0 no no no no |
+--------------+-----------+-----------------------------------------+
@@ -307,8 +307,16 @@ condition changes. The defined behaviors are as follow:
* zone-offline
* repair
-The I/O error actions defined for each behavior are detailed in the previous
-section.
+The run-time I/O error actions defined for each behavior are detailed in the
+previous section. Mount time I/O errors will cause the mount operation to fail.
+The handling of read-only zones also differs between mount-time and run-time.
+If a read-only zone is found at mount time, the zone is always treated in the
+same manner as offline zones, that is, all accesses are disabled and the zone
+file size set to 0. This is necessary as the write pointer of read-only zones
+is defined as invalib by the ZBC and ZAC standards, making it impossible to
+discover the amount of data that has been written to the zone. In the case of a
+read-only zone discovered at run-time, as indicated in the previous section.
+the size of the zone file is left unchanged from its last updated value.
Zonefs User Space Tools
=======================