#ifndef _ASM_GENERIC_SIGINFO_H #define _ASM_GENERIC_SIGINFO_H #include #define __SI_MASK 0xffff0000u #define __SI_KILL (0 << 16) #define __SI_TIMER (1 << 16) #define __SI_POLL (2 << 16) #define __SI_FAULT (3 << 16) #define __SI_CHLD (4 << 16) #define __SI_RT (5 << 16) #define __SI_MESGQ (6 << 16) #define __SI_SYS (7 << 16) #define __SI_CODE(T,N) ((T) | ((N) & 0xffff)) struct siginfo; void do_schedule_next_timer(struct siginfo *info); extern int copy_siginfo_to_user(struct siginfo __user *to, const struct siginfo *from); #endif ='net-next.git Git repository'/>
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authorJeff Layton <jlayton@redhat.com>2016-11-30 15:56:46 -0500
committerIlya Dryomov <idryomov@gmail.com>2016-12-08 14:32:16 +0100
commitc3f4688a08fd86f1bf8e055724c84b7a40a09733 (patch)
treeebcb5ab3dc9517a0a644a16421dcfc90b5b28454 /Documentation
parent3e5de27e940d00d8d504dfb96625fb654f641509 (diff)
ceph: don't set req->r_locked_dir in ceph_d_revalidate
This function sets req->r_locked_dir which is supposed to indicate to ceph_fill_trace that the parent's i_rwsem is locked for write. Unfortunately, there is no guarantee that the dir will be locked when d_revalidate is called, so we really don't want ceph_fill_trace to do any dcache manipulation from this context. Clear req->r_locked_dir since it's clearly not safe to do that. What we really want to know with d_revalidate is whether the dentry still points to the same inode. ceph_fill_trace installs a pointer to the inode in req->r_target_inode, so we can just compare that to d_inode(dentry) to see if it's the same one after the lookup. Also, since we aren't generally interested in the parent here, we can switch to using a GETATTR to hint that to the MDS, which also means that we only need to reserve one cap. Finally, just remove the d_unhashed check. That's really outside the purview of a filesystem's d_revalidate. If the thing became unhashed while we're checking it, then that's up to the VFS to handle anyway. Fixes: 200fd27c8fa2 ("ceph: use lookup request to revalidate dentry") Link: http://tracker.ceph.com/issues/18041 Reported-by: Donatas Abraitis <donatas.abraitis@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'Documentation')