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| author | David Howells <dhowells@redhat.com> | 2019-05-09 15:15:11 +0200 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2019-05-16 23:23:21 +0200 |
| commit | 61c347ba551162edb1c6abfa60ce6907baf7a1af (patch) | |
| tree | 9cc9f932c217021951719743663d9ff9b16ac43c /fs | |
| parent | afs: Make vnode->cb_interest RCU safe (diff) | |
| download | linux-61c347ba551162edb1c6abfa60ce6907baf7a1af.tar.xz linux-61c347ba551162edb1c6abfa60ce6907baf7a1af.zip | |
afs: Clear AFS_VNODE_CB_PROMISED if we detect callback expiry
Fix afs_validate() to clear AFS_VNODE_CB_PROMISED on a vnode if we detect
any condition that causes the callback promise to be broken implicitly,
including server break (cb_s_break), volume break (cb_v_break) or callback
expiry.
Fixes: ae3b7361dc0e ("afs: Fix validation/callback interaction")
Reported-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/afs/inode.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/afs/inode.c b/fs/afs/inode.c index ba35b4824408..37c5de793353 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -571,7 +571,7 @@ bool afs_check_validity(struct afs_vnode *vnode) struct afs_server *server; struct afs_volume *volume = vnode->volume; time64_t now = ktime_get_real_seconds(); - bool valid; + bool valid, need_clear = false; unsigned int cb_break, cb_s_break, cb_v_break; int seq = 0; @@ -589,10 +589,13 @@ bool afs_check_validity(struct afs_vnode *vnode) vnode->cb_v_break != cb_v_break) { vnode->cb_s_break = cb_s_break; vnode->cb_v_break = cb_v_break; + need_clear = true; valid = false; } else if (test_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) { + need_clear = true; valid = false; } else if (vnode->cb_expires_at - 10 <= now) { + need_clear = true; valid = false; } else { valid = true; @@ -607,6 +610,15 @@ bool afs_check_validity(struct afs_vnode *vnode) } while (need_seqretry(&vnode->cb_lock, seq)); done_seqretry(&vnode->cb_lock, seq); + + if (need_clear) { + write_seqlock(&vnode->cb_lock); + if (cb_break == vnode->cb_break) + __afs_break_callback(vnode); + write_sequnlock(&vnode->cb_lock); + valid = false; + } + return valid; } |