Release 4.10 fs/ceph/acl.c
/*
* linux/fs/ceph/acl.c
*
* Copyright (C) 2013 Guangliang Zhao, <lucienchao@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include <linux/ceph/ceph_debug.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/xattr.h>
#include <linux/posix_acl_xattr.h>
#include <linux/posix_acl.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include "super.h"
static inline void ceph_set_cached_acl(struct inode *inode,
int type, struct posix_acl *acl)
{
struct ceph_inode_info *ci = ceph_inode(inode);
spin_lock(&ci->i_ceph_lock);
if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 0))
set_cached_acl(inode, type, acl);
else
forget_cached_acl(inode, type);
spin_unlock(&ci->i_ceph_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| guangliang zhao | guangliang zhao | 66 | 89.19% | 1 | 50.00% |
| andreas gruenbacher | andreas gruenbacher | 8 | 10.81% | 1 | 50.00% |
| Total | 74 | 100.00% | 2 | 100.00% |
struct posix_acl *ceph_get_acl(struct inode *inode, int type)
{
int size;
const char *name;
char *value = NULL;
struct posix_acl *acl;
switch (type) {
case ACL_TYPE_ACCESS:
name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
BUG();
}
size = __ceph_getxattr(inode, name, "", 0);
if (size > 0) {
value = kzalloc(size, GFP_NOFS);
if (!value)
return ERR_PTR(-ENOMEM);
size = __ceph_getxattr(inode, name, value, size);
}
if (size > 0)
acl = posix_acl_from_xattr(&init_user_ns, value, size);
else if (size == -ERANGE || size == -ENODATA || size == 0)
acl = NULL;
else
acl = ERR_PTR(-EIO);
kfree(value);
if (!IS_ERR(acl))
ceph_set_cached_acl(inode, type, acl);
return acl;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| guangliang zhao | guangliang zhao | 186 | 98.94% | 1 | 50.00% |
| andreas gruenbacher | andreas gruenbacher | 2 | 1.06% | 1 | 50.00% |
| Total | 188 | 100.00% | 2 | 100.00% |
int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
int ret = 0, size = 0;
const char *name = NULL;
char *value = NULL;
struct iattr newattrs;
umode_t new_mode = inode->i_mode, old_mode = inode->i_mode;
switch (type) {
case ACL_TYPE_ACCESS:
name = XATTR_NAME_POSIX_ACL_ACCESS;
if (acl) {
ret = posix_acl_update_mode(inode, &new_mode, &acl);
if (ret)
goto out;
}
break;
case ACL_TYPE_DEFAULT:
if (!S_ISDIR(inode->i_mode)) {
ret = acl ? -EINVAL : 0;
goto out;
}
name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
ret = -EINVAL;
goto out;
}
if (acl) {
size = posix_acl_xattr_size(acl->a_count);
value = kmalloc(size, GFP_NOFS);
if (!value) {
ret = -ENOMEM;
goto out;
}
ret = posix_acl_to_xattr(&init_user_ns, acl, value, size);
if (ret < 0)
goto out_free;
}
if (ceph_snap(inode) != CEPH_NOSNAP) {
ret = -EROFS;
goto out_free;
}
if (new_mode != old_mode) {
newattrs.ia_mode = new_mode;
newattrs.ia_valid = ATTR_MODE;
ret = __ceph_setattr(inode, &newattrs);
if (ret)
goto out_free;
}
ret = __ceph_setxattr(inode, name, value, size, 0);
if (ret) {
if (new_mode != old_mode) {
newattrs.ia_mode = old_mode;
newattrs.ia_valid = ATTR_MODE;
__ceph_setattr(inode, &newattrs);
}
goto out_free;
}
ceph_set_cached_acl(inode, type, acl);
out_free:
kfree(value);
out:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| guangliang zhao | guangliang zhao | 296 | 89.97% | 1 | 20.00% |
| jan kara | jan kara | 24 | 7.29% | 2 | 40.00% |
| andreas gruenbacher | andreas gruenbacher | 9 | 2.74% | 2 | 40.00% |
| Total | 329 | 100.00% | 5 | 100.00% |
int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
struct ceph_acls_info *info)
{
struct posix_acl *acl, *default_acl;
size_t val_size1 = 0, val_size2 = 0;
struct ceph_pagelist *pagelist = NULL;
void *tmp_buf = NULL;
int err;
err = posix_acl_create(dir, mode, &default_acl, &acl);
if (err)
return err;
if (acl) {
int ret = posix_acl_equiv_mode(acl, mode);
if (ret < 0)
goto out_err;
if (ret == 0) {
posix_acl_release(acl);
acl = NULL;
}
}
if (!default_acl && !acl)
return 0;
if (acl)
val_size1 = posix_acl_xattr_size(acl->a_count);
if (default_acl)
val_size2 = posix_acl_xattr_size(default_acl->a_count);
err = -ENOMEM;
tmp_buf = kmalloc(max(val_size1, val_size2), GFP_KERNEL);
if (!tmp_buf)
goto out_err;
pagelist = kmalloc(sizeof(struct ceph_pagelist), GFP_KERNEL);
if (!pagelist)
goto out_err;
ceph_pagelist_init(pagelist);
err = ceph_pagelist_reserve(pagelist, PAGE_SIZE);
if (err)
goto out_err;
ceph_pagelist_encode_32(pagelist, acl && default_acl ? 2 : 1);
if (acl) {
size_t len = strlen(XATTR_NAME_POSIX_ACL_ACCESS);
err = ceph_pagelist_reserve(pagelist, len + val_size1 + 8);
if (err)
goto out_err;
ceph_pagelist_encode_string(pagelist, XATTR_NAME_POSIX_ACL_ACCESS,
len);
err = posix_acl_to_xattr(&init_user_ns, acl,
tmp_buf, val_size1);
if (err < 0)
goto out_err;
ceph_pagelist_encode_32(pagelist, val_size1);
ceph_pagelist_append(pagelist, tmp_buf, val_size1);
}
if (default_acl) {
size_t len = strlen(XATTR_NAME_POSIX_ACL_DEFAULT);
err = ceph_pagelist_reserve(pagelist, len + val_size2 + 8);
if (err)
goto out_err;
err = ceph_pagelist_encode_string(pagelist,
XATTR_NAME_POSIX_ACL_DEFAULT, len);
err = posix_acl_to_xattr(&init_user_ns, default_acl,
tmp_buf, val_size2);
if (err < 0)
goto out_err;
ceph_pagelist_encode_32(pagelist, val_size2);
ceph_pagelist_append(pagelist, tmp_buf, val_size2);
}
kfree(tmp_buf);
info->acl = acl;
info->default_acl = default_acl;
info->pagelist = pagelist;
return 0;
out_err:
posix_acl_release(acl);
posix_acl_release(default_acl);
kfree(tmp_buf);
if (pagelist)
ceph_pagelist_release(pagelist);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhen yan | zhen yan | 367 | 80.48% | 2 | 33.33% |
| guangliang zhao | guangliang zhao | 46 | 10.09% | 1 | 16.67% |
| christoph hellwig | christoph hellwig | 23 | 5.04% | 1 | 16.67% |
| zheng yan | zheng yan | 16 | 3.51% | 1 | 16.67% |
| andreas gruenbacher | andreas gruenbacher | 4 | 0.88% | 1 | 16.67% |
| Total | 456 | 100.00% | 6 | 100.00% |
void ceph_init_inode_acls(struct inode* inode, struct ceph_acls_info *info)
{
if (!inode)
return;
ceph_set_cached_acl(inode, ACL_TYPE_ACCESS, info->acl);
ceph_set_cached_acl(inode, ACL_TYPE_DEFAULT, info->default_acl);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhen yan | zhen yan | 31 | 72.09% | 1 | 33.33% |
| guangliang zhao | guangliang zhao | 10 | 23.26% | 1 | 33.33% |
| christoph hellwig | christoph hellwig | 2 | 4.65% | 1 | 33.33% |
| Total | 43 | 100.00% | 3 | 100.00% |
void ceph_release_acls_info(struct ceph_acls_info *info)
{
posix_acl_release(info->acl);
posix_acl_release(info->default_acl);
if (info->pagelist)
ceph_pagelist_release(info->pagelist);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhen yan | zhen yan | 31 | 83.78% | 1 | 50.00% |
| guangliang zhao | guangliang zhao | 6 | 16.22% | 1 | 50.00% |
| Total | 37 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| guangliang zhao | guangliang zhao | 638 | 55.24% | 1 | 10.00% |
| zhen yan | zhen yan | 429 | 37.14% | 2 | 20.00% |
| christoph hellwig | christoph hellwig | 25 | 2.16% | 1 | 10.00% |
| jan kara | jan kara | 24 | 2.08% | 2 | 20.00% |
| andreas gruenbacher | andreas gruenbacher | 23 | 1.99% | 3 | 30.00% |
| zheng yan | zheng yan | 16 | 1.39% | 1 | 10.00% |
| Total | 1155 | 100.00% | 10 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.