NFSD: add posix ACLs to struct nfsd_attrs

pacl and dpacl pointers are added to struct nfsd_attrs, which requires
that we have an nfsd_attrs_free() function to free them.
Those nfsv4 functions that can set ACLs now set up these pointers
based on the passed in NFSv4 ACL.

nfsd_setattr() sets the acls as appropriate.

Errors are handled as with security labels.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
NeilBrown 2022-07-26 16:45:30 +10:00 committed by Chuck Lever
parent d6a97d3f58
commit c0cbe70742
5 changed files with 47 additions and 71 deletions

View File

@ -38,6 +38,8 @@
struct nfs4_acl;
struct svc_fh;
struct svc_rqst;
struct nfsd_attrs;
enum nfs_ftype4;
int nfs4_acl_bytes(int entries);
int nfs4_acl_get_whotype(char *, u32);
@ -45,7 +47,7 @@ __be32 nfs4_acl_write_who(struct xdr_stream *xdr, int who);
int nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry,
struct nfs4_acl **acl);
__be32 nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct nfs4_acl *acl);
__be32 nfsd4_acl_to_attr(enum nfs_ftype4 type, struct nfs4_acl *acl,
struct nfsd_attrs *attr);
#endif /* LINUX_NFS4_ACL_H */

View File

@ -751,58 +751,26 @@ out_estate:
return ret;
}
__be32
nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct nfs4_acl *acl)
__be32 nfsd4_acl_to_attr(enum nfs_ftype4 type, struct nfs4_acl *acl,
struct nfsd_attrs *attr)
{
__be32 error;
int host_error;
struct dentry *dentry;
struct inode *inode;
struct posix_acl *pacl = NULL, *dpacl = NULL;
unsigned int flags = 0;
/* Get inode */
error = fh_verify(rqstp, fhp, 0, NFSD_MAY_SATTR);
if (error)
return error;
if (!acl)
return nfs_ok;
dentry = fhp->fh_dentry;
inode = d_inode(dentry);
if (S_ISDIR(inode->i_mode))
if (type == NF4DIR)
flags = NFS4_ACL_DIR;
host_error = nfs4_acl_nfsv4_to_posix(acl, &pacl, &dpacl, flags);
host_error = nfs4_acl_nfsv4_to_posix(acl, &attr->na_pacl,
&attr->na_dpacl, flags);
if (host_error == -EINVAL)
return nfserr_attrnotsupp;
if (host_error < 0)
goto out_nfserr;
fh_lock(fhp);
host_error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_ACCESS, pacl);
if (host_error < 0)
goto out_drop_lock;
if (S_ISDIR(inode->i_mode)) {
host_error = set_posix_acl(&init_user_ns, inode,
ACL_TYPE_DEFAULT, dpacl);
}
out_drop_lock:
fh_unlock(fhp);
posix_acl_release(pacl);
posix_acl_release(dpacl);
out_nfserr:
if (host_error == -EOPNOTSUPP)
return nfserr_attrnotsupp;
else
return nfserrno(host_error);
}
static short
ace2type(struct nfs4_ace *ace)
{

View File

@ -128,26 +128,6 @@ is_create_with_attrs(struct nfsd4_open *open)
|| open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
}
/*
* if error occurs when setting the acl, just clear the acl bit
* in the returned attr bitmap.
*/
static void
do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct nfs4_acl *acl, u32 *bmval)
{
__be32 status;
status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
if (status)
/*
* We should probably fail the whole open at this point,
* but we've already created the file, so it's too late;
* So this seems the least of evils:
*/
bmval[0] &= ~FATTR4_WORD0_ACL;
}
static inline void
fh_dup2(struct svc_fh *dst, struct svc_fh *src)
{
@ -281,6 +261,9 @@ nfsd4_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
if (host_err)
return nfserrno(host_err);
if (is_create_with_attrs(open))
nfsd4_acl_to_attr(NF4REG, open->op_acl, &attrs);
fh_lock_nested(fhp, I_MUTEX_PARENT);
child = lookup_one_len(open->op_fname, parent, open->op_fnamelen);
@ -382,8 +365,11 @@ set_attr:
if (attrs.na_labelerr)
open->op_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
if (attrs.na_aclerr)
open->op_bmval[0] &= ~FATTR4_WORD0_ACL;
out:
fh_unlock(fhp);
nfsd_attrs_free(&attrs);
if (child && !IS_ERR(child))
dput(child);
fh_drop_write(fhp);
@ -446,9 +432,6 @@ do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stru
if (status)
goto out;
if (is_create_with_attrs(open) && open->op_acl != NULL)
do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
accmode = NFSD_MAY_NOP;
if (open->op_created ||
@ -779,6 +762,7 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (status)
return status;
status = nfsd4_acl_to_attr(create->cr_type, create->cr_acl, &attrs);
current->fs->umask = create->cr_umask;
switch (create->cr_type) {
case NF4LNK:
@ -837,10 +821,8 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (attrs.na_labelerr)
create->cr_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
if (create->cr_acl != NULL)
do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
create->cr_bmval);
if (attrs.na_aclerr)
create->cr_bmval[0] &= ~FATTR4_WORD0_ACL;
fh_unlock(&cstate->current_fh);
set_change_info(&create->cr_cinfo, &cstate->current_fh);
@ -849,6 +831,7 @@ out:
fh_put(&resfh);
out_umask:
current->fs->umask = 0;
nfsd_attrs_free(&attrs);
return status;
}
@ -1123,6 +1106,7 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
.na_iattr = &setattr->sa_iattr,
.na_seclabel = &setattr->sa_label,
};
struct inode *inode;
__be32 status = nfs_ok;
int err;
@ -1145,9 +1129,10 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (status)
goto out;
if (setattr->sa_acl != NULL)
status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
setattr->sa_acl);
inode = cstate->current_fh.fh_dentry->d_inode;
status = nfsd4_acl_to_attr(S_ISDIR(inode->i_mode) ? NF4DIR : NF4REG,
setattr->sa_acl, &attrs);
if (status)
goto out;
status = nfsd_setattr(rqstp, &cstate->current_fh, &attrs,
@ -1155,6 +1140,7 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (!status)
status = nfserrno(attrs.na_labelerr);
out:
nfsd_attrs_free(&attrs);
fh_drop_write(&cstate->current_fh);
return status;
}

View File

@ -461,6 +461,15 @@ out_unlock:
if (attr->na_seclabel && attr->na_seclabel->len)
attr->na_labelerr = security_inode_setsecctx(dentry,
attr->na_seclabel->data, attr->na_seclabel->len);
if (IS_ENABLED(CONFIG_FS_POSIX_ACL) && attr->na_pacl)
attr->na_aclerr = set_posix_acl(&init_user_ns,
inode, ACL_TYPE_ACCESS,
attr->na_pacl);
if (IS_ENABLED(CONFIG_FS_POSIX_ACL) &&
!attr->na_aclerr && attr->na_dpacl && S_ISDIR(inode->i_mode))
attr->na_aclerr = set_posix_acl(&init_user_ns,
inode, ACL_TYPE_DEFAULT,
attr->na_dpacl);
fh_unlock(fhp);
if (size_change)
put_write_access(inode);

View File

@ -6,6 +6,8 @@
#ifndef LINUX_NFSD_VFS_H
#define LINUX_NFSD_VFS_H
#include <linux/fs.h>
#include <linux/posix_acl.h>
#include "nfsfh.h"
#include "nfsd.h"
@ -45,10 +47,19 @@ typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
struct nfsd_attrs {
struct iattr *na_iattr; /* input */
struct xdr_netobj *na_seclabel; /* input */
struct posix_acl *na_pacl; /* input */
struct posix_acl *na_dpacl; /* input */
int na_labelerr; /* output */
int na_aclerr; /* output */
};
static inline void nfsd_attrs_free(struct nfsd_attrs *attrs)
{
posix_acl_release(attrs->na_pacl);
posix_acl_release(attrs->na_dpacl);
}
int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
struct svc_export **expp);
__be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,