From c925bd0ac4741badb567f594c41c8cba5e9e9732 Mon Sep 17 00:00:00 2001 From: David Howells Date: Thu, 9 May 2019 14:31:11 +0100 Subject: [PATCH] afs: Split afs_validate() so first part can be used under LOOKUP_RCU Split afs_validate() so that the part that decides if the vnode is still valid can be used under LOOKUP_RCU conditions from afs_d_revalidate(). Signed-off-by: David Howells --- fs/afs/inode.c | 37 ++++++++++++++++++++++++------------- fs/afs/internal.h | 1 + 2 files changed, 25 insertions(+), 13 deletions(-) diff --git a/fs/afs/inode.c b/fs/afs/inode.c index 8d3d060a33fc..5c95da7d5f3d 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -561,23 +561,12 @@ void afs_zap_data(struct afs_vnode *vnode) } /* - * validate a vnode/inode - * - there are several things we need to check - * - parent dir data changes (rm, rmdir, rename, mkdir, create, link, - * symlink) - * - parent dir metadata changed (security changes) - * - dentry data changed (write, truncate) - * - dentry metadata changed (security changes) + * Check the validity of a vnode/inode. */ -int afs_validate(struct afs_vnode *vnode, struct key *key) +bool afs_check_validity(struct afs_vnode *vnode) { time64_t now = ktime_get_real_seconds(); bool valid; - int ret; - - _enter("{v={%llx:%llu} fl=%lx},%x", - vnode->fid.vid, vnode->fid.vnode, vnode->flags, - key_serial(key)); /* Quickly check the callback state. Ideally, we'd use read_seqbegin * here, but we have no way to pass the net namespace to the RCU @@ -606,6 +595,28 @@ int afs_validate(struct afs_vnode *vnode, struct key *key) } read_sequnlock_excl(&vnode->cb_lock); + return valid; +} + +/* + * validate a vnode/inode + * - there are several things we need to check + * - parent dir data changes (rm, rmdir, rename, mkdir, create, link, + * symlink) + * - parent dir metadata changed (security changes) + * - dentry data changed (write, truncate) + * - dentry metadata changed (security changes) + */ +int afs_validate(struct afs_vnode *vnode, struct key *key) +{ + bool valid; + int ret; + + _enter("{v={%llx:%llu} fl=%lx},%x", + vnode->fid.vid, vnode->fid.vnode, vnode->flags, + key_serial(key)); + + valid = afs_check_validity(vnode); if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) clear_nlink(&vnode->vfs_inode); diff --git a/fs/afs/internal.h b/fs/afs/internal.h index ca7edfe97410..54688f6ca9e5 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -1022,6 +1022,7 @@ extern struct inode *afs_iget(struct super_block *, struct key *, struct afs_cb_interest *, struct afs_vnode *); extern void afs_zap_data(struct afs_vnode *); +extern bool afs_check_validity(struct afs_vnode *); extern int afs_validate(struct afs_vnode *, struct key *); extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); extern int afs_setattr(struct dentry *, struct iattr *); -- 2.30.2