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authorBob Peterson <rpeterso@redhat.com>2019-06-13 21:28:45 +0300
committerBob Peterson <rpeterso@redhat.com>2020-02-20 20:01:36 +0300
commita72d2401f54b7db41c77ab971238a06eafe929fb (patch)
treef1055bffda071498f6da9577c4b12aabc57fa299 /fs/gfs2/incore.h
parent0d91061a372671aec1af729686ad9241a59fc328 (diff)
downloadlinux-a72d2401f54b7db41c77ab971238a06eafe929fb.tar.xz
gfs2: Allow some glocks to be used during withdraw
We need to allow some glocks to be enqueued, dequeued, promoted, and demoted when we're withdrawn. For example, to maintain metadata integrity, we should disallow the use of inode and rgrp glocks when withdrawn. Other glocks, like iopen or the transaction glocks may be safely used because none of their metadata goes through the journal. So in general, we should disallow all glocks with an address space, and allow all the others. One exception is: we need to allow our active journal to be demoted so others may recover it. Allowing glocks after withdraw gives us the ability to take appropriate action (in a following patch) to have our journal properly replayed by another node rather than just abandoning the current transactions and pretending nothing bad happened, leaving the other nodes free to modify the blocks we had in our journal, which may result in file system corruption. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2/incore.h')
-rw-r--r--fs/gfs2/incore.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index ab89f746b3b6..3072707aff7a 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -244,9 +244,10 @@ struct gfs2_glock_operations {
void (*go_callback)(struct gfs2_glock *gl, bool remote);
const int go_type;
const unsigned long go_flags;
-#define GLOF_ASPACE 1
-#define GLOF_LVB 2
-#define GLOF_LRU 4
+#define GLOF_ASPACE 1 /* address space attached */
+#define GLOF_LVB 2 /* Lock Value Block attached */
+#define GLOF_LRU 4 /* LRU managed */
+#define GLOF_NONDISK 8 /* not I/O related */
};
enum {
@@ -541,6 +542,7 @@ struct gfs2_jdesc {
struct list_head jd_revoke_list;
unsigned int jd_replay_tail;
+ u64 jd_no_addr;
};
struct gfs2_statfs_change_host {