The patch titled
r/o bind mounts: elevate mnt_writers for unlink callers
has been removed from the -mm tree. Its filename was
r-o-bind-mounts-elevate-mnt_writers-for-unlink-callers.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: r/o bind mounts: elevate mnt_writers for unlink callers
From: Dave Hansen <haveblue@xxxxxxxxxx>
Acked-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Dave Hansen <haveblue@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/namei.c | 4 ++++
ipc/mqueue.c | 5 ++++-
2 files changed, 8 insertions(+), 1 deletion(-)
diff -puN fs/namei.c~r-o-bind-mounts-elevate-mnt_writers-for-unlink-callers fs/namei.c
--- a/fs/namei.c~r-o-bind-mounts-elevate-mnt_writers-for-unlink-callers
+++ a/fs/namei.c
@@ -2281,7 +2281,11 @@ static long do_unlinkat(int dfd, const c
inode = dentry->d_inode;
if (inode)
atomic_inc(&inode->i_count);
+ error = mnt_want_write(nd.path.mnt);
+ if (error)
+ goto exit2;
error = vfs_unlink(nd.path.dentry->d_inode, dentry);
+ mnt_drop_write(nd.path.mnt);
exit2:
dput(dentry);
}
diff -puN ipc/mqueue.c~r-o-bind-mounts-elevate-mnt_writers-for-unlink-callers ipc/mqueue.c
--- a/ipc/mqueue.c~r-o-bind-mounts-elevate-mnt_writers-for-unlink-callers
+++ a/ipc/mqueue.c
@@ -742,8 +742,11 @@ asmlinkage long sys_mq_unlink(const char
inode = dentry->d_inode;
if (inode)
atomic_inc(&inode->i_count);
-
+ err = mnt_want_write(mqueue_mnt);
+ if (err)
+ goto out_err;
err = vfs_unlink(dentry->d_parent->d_inode, dentry);
+ mnt_drop_write(mqueue_mnt);
out_err:
dput(dentry);
_
Patches currently in -mm which might be from haveblue@xxxxxxxxxx are
git-vfs.patch
hugetlb-decrease-hugetlb_lock-cycling-in-gather_surplus_huge_pages.patch
mm-make-mem_map-allocation-continuous.patch
vfs-create-proc-pid-mountinfo.patch
vfs-mountinfo-mm-fix.patch
vfs-pnode-cleanup.patch
vfs-mountinfo-stable-peer-group-id.patch
vfs-mountinfo-show-dominating-group-id.patch
vfs-optimization-to-proc-pid-mountinfo-patch.patch
vfs-mountinfo-only-show-mounts-under-tasks-root.patch
kprobes-prevent-probing-of-preempt_schedule.patch
kprobes-prevent-probing-of-preempt_schedule-fix.patch
kprobes-prevent-probing-of-preempt_schedule-checkpatch-fixes.patch
reiser4.patch
page-owner-tracking-leak-detector.patch
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