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[PATCH] NFSD: Add server support for NFSv3 ACLs.

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This adds functions for encoding and decoding POSIX ACLs for the NFSACL
 protocol extension, and the GETACL and SETACL RPCs.  The implementation is
 compatible with NFSACL in Solaris.

 Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
 Acked-by: Olaf Kirch <okir@suse.de>
 Signed-off-by: Andrew Morton <akpm@osdl.org>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andreas Gruenbacher
2005-06-22 17:16:26 +00:00
committed by Trond Myklebust
parent 9ba02638e4
commit a257cdd0e2
16 changed files with 1166 additions and 1 deletions
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107
fs/nfsd/vfs.c
View File

@@ -46,8 +46,9 @@
#include <linux/nfsd/nfsfh.h>
#include <linux/quotaops.h>
#include <linux/dnotify.h>
#ifdef CONFIG_NFSD_V4
#include <linux/xattr_acl.h>
#include <linux/posix_acl.h>
#ifdef CONFIG_NFSD_V4
#include <linux/posix_acl_xattr.h>
#include <linux/xattr_acl.h>
#include <linux/xattr.h>
@@ -1857,3 +1858,107 @@ nfsd_racache_init(int cache_size)
nfsdstats.ra_size = cache_size;
return 0;
}
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
struct posix_acl *
nfsd_get_posix_acl(struct svc_fh *fhp, int type)
{
struct inode *inode = fhp->fh_dentry->d_inode;
char *name;
void *value = NULL;
ssize_t size;
struct posix_acl *acl;
if (!IS_POSIXACL(inode) || !inode->i_op || !inode->i_op->getxattr)
return ERR_PTR(-EOPNOTSUPP);
switch(type) {
case ACL_TYPE_ACCESS:
name = XATTR_NAME_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
name = XATTR_NAME_ACL_DEFAULT;
break;
default:
return ERR_PTR(-EOPNOTSUPP);
}
size = inode->i_op->getxattr(fhp->fh_dentry, name, NULL, 0);
if (size < 0) {
acl = ERR_PTR(size);
goto getout;
} else if (size > 0) {
value = kmalloc(size, GFP_KERNEL);
if (!value) {
acl = ERR_PTR(-ENOMEM);
goto getout;
}
size = inode->i_op->getxattr(fhp->fh_dentry, name, value, size);
if (size < 0) {
acl = ERR_PTR(size);
goto getout;
}
}
acl = posix_acl_from_xattr(value, size);
getout:
kfree(value);
return acl;
}
int
nfsd_set_posix_acl(struct svc_fh *fhp, int type, struct posix_acl *acl)
{
struct inode *inode = fhp->fh_dentry->d_inode;
char *name;
void *value = NULL;
size_t size;
int error;
if (!IS_POSIXACL(inode) || !inode->i_op ||
!inode->i_op->setxattr || !inode->i_op->removexattr)
return -EOPNOTSUPP;
switch(type) {
case ACL_TYPE_ACCESS:
name = XATTR_NAME_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
name = XATTR_NAME_ACL_DEFAULT;
break;
default:
return -EOPNOTSUPP;
}
if (acl && acl->a_count) {
size = xattr_acl_size(acl->a_count);
value = kmalloc(size, GFP_KERNEL);
if (!value)
return -ENOMEM;
size = posix_acl_to_xattr(acl, value, size);
if (size < 0) {
error = size;
goto getout;
}
} else
size = 0;
if (!fhp->fh_locked)
fh_lock(fhp); /* unlocking is done automatically */
if (size)
error = inode->i_op->setxattr(fhp->fh_dentry, name,
value, size, 0);
else {
if (!S_ISDIR(inode->i_mode) && type == ACL_TYPE_DEFAULT)
error = 0;
else {
error = inode->i_op->removexattr(fhp->fh_dentry, name);
if (error == -ENODATA)
error = 0;
}
}
getout:
kfree(value);
return error;
}
#endif /* defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) */