mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 11:06:40 +07:00
8f493b9cfc
nfs3_proc_setacls is used internally by the NFSv3 create operations to set the acl after the file has been created. If the operation fails because the server doesn't support acls, then it must return '0', not -EOPNOTSUPP. Reported-by: Russell King <linux@arm.linux.org.uk> Link: http://lkml.kernel.org/r/20140201010328.GI15937@n2100.arm.linux.org.uk Cc: Christoph Hellwig <hch@lst.de> Tested-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
250 lines
5.9 KiB
C
250 lines
5.9 KiB
C
#include <linux/fs.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/nfs.h>
|
|
#include <linux/nfs3.h>
|
|
#include <linux/nfs_fs.h>
|
|
#include <linux/posix_acl_xattr.h>
|
|
#include <linux/nfsacl.h>
|
|
|
|
#include "internal.h"
|
|
|
|
#define NFSDBG_FACILITY NFSDBG_PROC
|
|
|
|
struct posix_acl *nfs3_get_acl(struct inode *inode, int type)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct page *pages[NFSACL_MAXPAGES] = { };
|
|
struct nfs3_getaclargs args = {
|
|
.fh = NFS_FH(inode),
|
|
/* The xdr layer may allocate pages here. */
|
|
.pages = pages,
|
|
};
|
|
struct nfs3_getaclres res = {
|
|
NULL,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status, count;
|
|
|
|
if (!nfs_server_capable(inode, NFS_CAP_ACLS))
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
status = nfs_revalidate_inode(server, inode);
|
|
if (status < 0)
|
|
return ERR_PTR(status);
|
|
|
|
/*
|
|
* Only get the access acl when explicitly requested: We don't
|
|
* need it for access decisions, and only some applications use
|
|
* it. Applications which request the access acl first are not
|
|
* penalized from this optimization.
|
|
*/
|
|
if (type == ACL_TYPE_ACCESS)
|
|
args.mask |= NFS_ACLCNT|NFS_ACL;
|
|
if (S_ISDIR(inode->i_mode))
|
|
args.mask |= NFS_DFACLCNT|NFS_DFACL;
|
|
if (args.mask == 0)
|
|
return NULL;
|
|
|
|
dprintk("NFS call getacl\n");
|
|
msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_GETACL];
|
|
res.fattr = nfs_alloc_fattr();
|
|
if (res.fattr == NULL)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
status = rpc_call_sync(server->client_acl, &msg, 0);
|
|
dprintk("NFS reply getacl: %d\n", status);
|
|
|
|
/* pages may have been allocated at the xdr layer. */
|
|
for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++)
|
|
__free_page(args.pages[count]);
|
|
|
|
switch (status) {
|
|
case 0:
|
|
status = nfs_refresh_inode(inode, res.fattr);
|
|
break;
|
|
case -EPFNOSUPPORT:
|
|
case -EPROTONOSUPPORT:
|
|
dprintk("NFS_V3_ACL extension not supported; disabling\n");
|
|
server->caps &= ~NFS_CAP_ACLS;
|
|
case -ENOTSUPP:
|
|
status = -EOPNOTSUPP;
|
|
default:
|
|
goto getout;
|
|
}
|
|
if ((args.mask & res.mask) != args.mask) {
|
|
status = -EIO;
|
|
goto getout;
|
|
}
|
|
|
|
if (res.acl_access != NULL) {
|
|
if ((posix_acl_equiv_mode(res.acl_access, NULL) == 0) ||
|
|
res.acl_access->a_count == 0) {
|
|
posix_acl_release(res.acl_access);
|
|
res.acl_access = NULL;
|
|
}
|
|
}
|
|
|
|
if (res.mask & NFS_ACL)
|
|
set_cached_acl(inode, ACL_TYPE_ACCESS, res.acl_access);
|
|
else
|
|
forget_cached_acl(inode, ACL_TYPE_ACCESS);
|
|
|
|
if (res.mask & NFS_DFACL)
|
|
set_cached_acl(inode, ACL_TYPE_DEFAULT, res.acl_default);
|
|
else
|
|
forget_cached_acl(inode, ACL_TYPE_DEFAULT);
|
|
|
|
nfs_free_fattr(res.fattr);
|
|
if (type == ACL_TYPE_ACCESS) {
|
|
posix_acl_release(res.acl_default);
|
|
return res.acl_access;
|
|
} else {
|
|
posix_acl_release(res.acl_access);
|
|
return res.acl_default;
|
|
}
|
|
|
|
getout:
|
|
posix_acl_release(res.acl_access);
|
|
posix_acl_release(res.acl_default);
|
|
nfs_free_fattr(res.fattr);
|
|
return ERR_PTR(status);
|
|
}
|
|
|
|
static int __nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
|
|
struct posix_acl *dfacl)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs_fattr *fattr;
|
|
struct page *pages[NFSACL_MAXPAGES];
|
|
struct nfs3_setaclargs args = {
|
|
.inode = inode,
|
|
.mask = NFS_ACL,
|
|
.acl_access = acl,
|
|
.pages = pages,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &fattr,
|
|
};
|
|
int status;
|
|
|
|
status = -EOPNOTSUPP;
|
|
if (!nfs_server_capable(inode, NFS_CAP_ACLS))
|
|
goto out;
|
|
|
|
/* We are doing this here because XDR marshalling does not
|
|
* return any results, it BUGs. */
|
|
status = -ENOSPC;
|
|
if (acl != NULL && acl->a_count > NFS_ACL_MAX_ENTRIES)
|
|
goto out;
|
|
if (dfacl != NULL && dfacl->a_count > NFS_ACL_MAX_ENTRIES)
|
|
goto out;
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
args.mask |= NFS_DFACL;
|
|
args.acl_default = dfacl;
|
|
args.len = nfsacl_size(acl, dfacl);
|
|
} else
|
|
args.len = nfsacl_size(acl, NULL);
|
|
|
|
if (args.len > NFS_ACL_INLINE_BUFSIZE) {
|
|
unsigned int npages = 1 + ((args.len - 1) >> PAGE_SHIFT);
|
|
|
|
status = -ENOMEM;
|
|
do {
|
|
args.pages[args.npages] = alloc_page(GFP_KERNEL);
|
|
if (args.pages[args.npages] == NULL)
|
|
goto out_freepages;
|
|
args.npages++;
|
|
} while (args.npages < npages);
|
|
}
|
|
|
|
dprintk("NFS call setacl\n");
|
|
status = -ENOMEM;
|
|
fattr = nfs_alloc_fattr();
|
|
if (fattr == NULL)
|
|
goto out_freepages;
|
|
|
|
msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_SETACL];
|
|
msg.rpc_resp = fattr;
|
|
status = rpc_call_sync(server->client_acl, &msg, 0);
|
|
nfs_access_zap_cache(inode);
|
|
nfs_zap_acl_cache(inode);
|
|
dprintk("NFS reply setacl: %d\n", status);
|
|
|
|
switch (status) {
|
|
case 0:
|
|
status = nfs_refresh_inode(inode, fattr);
|
|
set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
|
|
set_cached_acl(inode, ACL_TYPE_DEFAULT, dfacl);
|
|
break;
|
|
case -EPFNOSUPPORT:
|
|
case -EPROTONOSUPPORT:
|
|
dprintk("NFS_V3_ACL SETACL RPC not supported"
|
|
"(will not retry)\n");
|
|
server->caps &= ~NFS_CAP_ACLS;
|
|
case -ENOTSUPP:
|
|
status = -EOPNOTSUPP;
|
|
}
|
|
nfs_free_fattr(fattr);
|
|
out_freepages:
|
|
while (args.npages != 0) {
|
|
args.npages--;
|
|
__free_page(args.pages[args.npages]);
|
|
}
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
|
|
struct posix_acl *dfacl)
|
|
{
|
|
int ret;
|
|
ret = __nfs3_proc_setacls(inode, acl, dfacl);
|
|
return (ret == -EOPNOTSUPP) ? 0 : ret;
|
|
|
|
}
|
|
|
|
int nfs3_set_acl(struct inode *inode, struct posix_acl *acl, int type)
|
|
{
|
|
struct posix_acl *alloc = NULL, *dfacl = NULL;
|
|
int status;
|
|
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
switch(type) {
|
|
case ACL_TYPE_ACCESS:
|
|
alloc = dfacl = get_acl(inode, ACL_TYPE_DEFAULT);
|
|
if (IS_ERR(alloc))
|
|
goto fail;
|
|
break;
|
|
|
|
case ACL_TYPE_DEFAULT:
|
|
dfacl = acl;
|
|
alloc = acl = get_acl(inode, ACL_TYPE_ACCESS);
|
|
if (IS_ERR(alloc))
|
|
goto fail;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (acl == NULL) {
|
|
alloc = acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
|
|
if (IS_ERR(alloc))
|
|
goto fail;
|
|
}
|
|
status = __nfs3_proc_setacls(inode, acl, dfacl);
|
|
posix_acl_release(alloc);
|
|
return status;
|
|
|
|
fail:
|
|
return PTR_ERR(alloc);
|
|
}
|
|
|
|
const struct xattr_handler *nfs3_xattr_handlers[] = {
|
|
&posix_acl_access_xattr_handler,
|
|
&posix_acl_default_xattr_handler,
|
|
NULL,
|
|
};
|