In order to add directory delegation support, we need to break delegations on the parent whenever there is going to be a change in the directory.
Rename the existing vfs_mkdir to __vfs_mkdir, make it static and add a new delegated_inode parameter. Add a new exported vfs_mkdir wrapper around it that passes a NULL pointer for delegated_inode. Signed-off-by: Jeff Layton <[email protected]> --- drivers/base/devtmpfs.c | 2 +- fs/cachefiles/namei.c | 2 +- fs/ecryptfs/inode.c | 2 +- fs/init.c | 2 +- fs/namei.c | 24 ++++++++++++++++++------ fs/nfsd/nfs4recover.c | 2 +- fs/nfsd/vfs.c | 2 +- fs/overlayfs/overlayfs.h | 2 +- fs/smb/server/vfs.c | 2 +- fs/xfs/scrub/orphanage.c | 2 +- include/linux/fs.h | 2 +- 11 files changed, 28 insertions(+), 16 deletions(-) diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c index 31bfb3194b4c29a1d6a002449045bf4e4141911d..a57da600ce7523e9e2755b78f75342bf4fa56ef6 100644 --- a/drivers/base/devtmpfs.c +++ b/drivers/base/devtmpfs.c @@ -180,7 +180,7 @@ static int dev_mkdir(const char *name, umode_t mode) if (IS_ERR(dentry)) return PTR_ERR(dentry); - dentry = vfs_mkdir(&nop_mnt_idmap, d_inode(path.dentry), dentry, mode); + dentry = vfs_mkdir(&nop_mnt_idmap, d_inode(path.dentry), dentry, mode, NULL); if (!IS_ERR(dentry)) /* mark as kernel-created inode */ d_inode(dentry)->i_private = &thread; diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c index 91dfd02318772fa63050ecf40fa5625ab48ad589..b3dac91efec622261186fbba8e704ae9e782bea0 100644 --- a/fs/cachefiles/namei.c +++ b/fs/cachefiles/namei.c @@ -130,7 +130,7 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache, goto mkdir_error; ret = cachefiles_inject_write_error(); if (ret == 0) - subdir = vfs_mkdir(&nop_mnt_idmap, d_inode(dir), subdir, 0700); + subdir = vfs_mkdir(&nop_mnt_idmap, d_inode(dir), subdir, 0700, NULL); else subdir = ERR_PTR(ret); if (IS_ERR(subdir)) { diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index 72fbe1316ab8831bb4228d573278f32fe52b6b25..00f54c125b102856c33ffff24627475f40dcbc7b 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -517,7 +517,7 @@ static struct dentry *ecryptfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, goto out; lower_dentry = vfs_mkdir(&nop_mnt_idmap, lower_dir, - lower_dentry, mode); + lower_dentry, mode, NULL); rc = PTR_ERR(lower_dentry); if (IS_ERR(lower_dentry)) goto out; diff --git a/fs/init.c b/fs/init.c index eef5124885e372ac020d2923692116c5e884b3cf..dd5240ce8ad41f02367a54ddf1b6ac0aa28e9721 100644 --- a/fs/init.c +++ b/fs/init.c @@ -232,7 +232,7 @@ int __init init_mkdir(const char *pathname, umode_t mode) error = security_path_mkdir(&path, dentry, mode); if (!error) { dentry = vfs_mkdir(mnt_idmap(path.mnt), path.dentry->d_inode, - dentry, mode); + dentry, mode, NULL); if (IS_ERR(dentry)) error = PTR_ERR(dentry); } diff --git a/fs/namei.c b/fs/namei.c index cd517eb232317d326e6d2fc5a60cb4c7569a137d..c939a58f16f9c4edded424475aff52f2c423d301 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -4320,10 +4320,11 @@ SYSCALL_DEFINE3(mknod, const char __user *, filename, umode_t, mode, unsigned, d /** * vfs_mkdir - create directory returning correct dentry if possible - * @idmap: idmap of the mount the inode was found from - * @dir: inode of the parent directory - * @dentry: dentry of the child directory - * @mode: mode of the child directory + * @idmap: idmap of the mount the inode was found from + * @dir: inode of the parent directory + * @dentry: dentry of the child directory + * @mode: mode of the child directory + * @delegated_inode: returns victim inode, if the inode is delegated. * * Create a directory. * @@ -4340,7 +4341,8 @@ SYSCALL_DEFINE3(mknod, const char __user *, filename, umode_t, mode, unsigned, d * In case of an error the dentry is dput() and an ERR_PTR() is returned. */ struct dentry *vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, - struct dentry *dentry, umode_t mode) + struct dentry *dentry, umode_t mode, + struct inode **delegated_inode) { int error; unsigned max_links = dir->i_sb->s_max_links; @@ -4363,6 +4365,10 @@ struct dentry *vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, if (max_links && dir->i_nlink >= max_links) goto err; + error = try_break_deleg(dir, delegated_inode); + if (error) + goto err; + de = dir->i_op->mkdir(idmap, dir, dentry, mode); error = PTR_ERR(de); if (IS_ERR(de)) @@ -4386,6 +4392,7 @@ int do_mkdirat(int dfd, struct filename *name, umode_t mode) struct path path; int error; unsigned int lookup_flags = LOOKUP_DIRECTORY; + struct inode *delegated_inode = NULL; retry: dentry = filename_create(dfd, name, &path, lookup_flags); @@ -4397,11 +4404,16 @@ int do_mkdirat(int dfd, struct filename *name, umode_t mode) mode_strip_umask(path.dentry->d_inode, mode)); if (!error) { dentry = vfs_mkdir(mnt_idmap(path.mnt), path.dentry->d_inode, - dentry, mode); + dentry, mode, &delegated_inode); if (IS_ERR(dentry)) error = PTR_ERR(dentry); } done_path_create(&path, dentry); + if (delegated_inode) { + error = break_deleg_wait(&delegated_inode); + if (!error) + goto retry; + } if (retry_estale(error, lookup_flags)) { lookup_flags |= LOOKUP_REVAL; goto retry; diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index b1005abcb9035b2cf743200808a251b00af7e3f4..423dd102b51198ea7c447be2b9a0a5020c950dba 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -202,7 +202,7 @@ nfsd4_create_clid_dir(struct nfs4_client *clp) * as well be forgiving and just succeed silently. */ goto out_put; - dentry = vfs_mkdir(&nop_mnt_idmap, d_inode(dir), dentry, S_IRWXU); + dentry = vfs_mkdir(&nop_mnt_idmap, d_inode(dir), dentry, 0700, NULL); if (IS_ERR(dentry)) status = PTR_ERR(dentry); out_put: diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 2026431500ecbc0cf5fb5d4af1a7632c611ce4f4..6f1275fdc8ac831aa0ea8da588f751eddff88df1 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1560,7 +1560,7 @@ nfsd_create_locked(struct svc_rqst *rqstp, struct svc_fh *fhp, nfsd_check_ignore_resizing(iap); break; case S_IFDIR: - dchild = vfs_mkdir(&nop_mnt_idmap, dirp, dchild, iap->ia_mode); + dchild = vfs_mkdir(&nop_mnt_idmap, dirp, dchild, iap->ia_mode, NULL); if (IS_ERR(dchild)) { host_err = PTR_ERR(dchild); } else if (d_is_negative(dchild)) { diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index bb0d7ded8e763a4a7a6fc506d966ed2f3bdb4f06..4a3a22f422c37d45e49a762cd3c9957aa2c6a485 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -248,7 +248,7 @@ static inline struct dentry *ovl_do_mkdir(struct ovl_fs *ofs, { struct dentry *ret; - ret = vfs_mkdir(ovl_upper_mnt_idmap(ofs), dir, dentry, mode); + ret = vfs_mkdir(ovl_upper_mnt_idmap(ofs), dir, dentry, mode, NULL); pr_debug("mkdir(%pd2, 0%o) = %i\n", dentry, mode, PTR_ERR_OR_ZERO(ret)); return ret; } diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c index 04539037108c93e285f4e9d6aa61f93a507ae5da..b0fb73b277876a56797f5cc8a5aa53f156bb7a26 100644 --- a/fs/smb/server/vfs.c +++ b/fs/smb/server/vfs.c @@ -229,7 +229,7 @@ int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode) idmap = mnt_idmap(path.mnt); mode |= S_IFDIR; d = dentry; - dentry = vfs_mkdir(idmap, d_inode(path.dentry), dentry, mode); + dentry = vfs_mkdir(idmap, d_inode(path.dentry), dentry, mode, NULL); if (IS_ERR(dentry)) err = PTR_ERR(dentry); else if (d_is_negative(dentry)) diff --git a/fs/xfs/scrub/orphanage.c b/fs/xfs/scrub/orphanage.c index 9c12cb8442311ca26b169e4d1567939ae44a5be0..91c9d07b97f306f57aebb9b69ba564b0c2cb8c17 100644 --- a/fs/xfs/scrub/orphanage.c +++ b/fs/xfs/scrub/orphanage.c @@ -167,7 +167,7 @@ xrep_orphanage_create( */ if (d_really_is_negative(orphanage_dentry)) { orphanage_dentry = vfs_mkdir(&nop_mnt_idmap, root_inode, - orphanage_dentry, 0750); + orphanage_dentry, 0750, NULL); error = PTR_ERR(orphanage_dentry); if (IS_ERR(orphanage_dentry)) goto out_unlock_root; diff --git a/include/linux/fs.h b/include/linux/fs.h index 74f2bfc519263c6411a8e3427e1bd6680a1121db..24a091509f12ce65a2c8343d438fccf423d3062b 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1997,7 +1997,7 @@ bool inode_owner_or_capable(struct mnt_idmap *idmap, int vfs_create(struct mnt_idmap *, struct inode *, struct dentry *, umode_t, bool); struct dentry *vfs_mkdir(struct mnt_idmap *, struct inode *, - struct dentry *, umode_t); + struct dentry *, umode_t, struct inode **); int vfs_mknod(struct mnt_idmap *, struct inode *, struct dentry *, umode_t, dev_t); int vfs_symlink(struct mnt_idmap *, struct inode *, -- 2.51.0
