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ocfs2: use generic posix ACL infrastructure

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This contains some major refactoring for the create path so that
inodes are created with the right mode to start with instead of
fixing it up later.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2013-12-20 05:16:48 -08:00 committed by Al Viro
parent f2963d4551
commit 702e5bc68a
7 changed files with 72 additions and 250 deletions
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234
fs/ocfs2/acl.c
View File

@ -160,36 +160,6 @@ static struct posix_acl *ocfs2_get_acl_nolock(struct inode *inode,
return acl;
}
/*
* Get posix acl.
*/
static struct posix_acl *ocfs2_get_acl(struct inode *inode, int type)
{
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct buffer_head *di_bh = NULL;
struct posix_acl *acl;
int ret;
if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
return NULL;
ret = ocfs2_inode_lock(inode, &di_bh, 0);
if (ret < 0) {
mlog_errno(ret);
acl = ERR_PTR(ret);
return acl;
}
acl = ocfs2_get_acl_nolock(inode, type, di_bh);
ocfs2_inode_unlock(inode, 0);
brelse(di_bh);
return acl;
}
/*
* Helper function to set i_mode in memory and disk. Some call paths
* will not have di_bh or a journal handle to pass, in which case it
@ -250,7 +220,7 @@ out:
/*
* Set the access or default ACL of an inode.
*/
static int ocfs2_set_acl(handle_t *handle,
int ocfs2_set_acl(handle_t *handle,
struct inode *inode,
struct buffer_head *di_bh,
int type,
@ -313,6 +283,11 @@ static int ocfs2_set_acl(handle_t *handle,
return ret;
}
int ocfs2_iop_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
return ocfs2_set_acl(NULL, inode, NULL, type, acl, NULL, NULL);
}
struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type)
{
struct ocfs2_super *osb;
@ -334,200 +309,3 @@ struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type)
return acl;
}
int ocfs2_acl_chmod(struct inode *inode)
{
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct posix_acl *acl;
int ret;
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
return 0;
acl = ocfs2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (ret)
return ret;
ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
acl, NULL, NULL);
posix_acl_release(acl);
return ret;
}
/*
* Initialize the ACLs of a new inode. If parent directory has default ACL,
* then clone to new inode. Called from ocfs2_mknod.
*/
int ocfs2_init_acl(handle_t *handle,
struct inode *inode,
struct inode *dir,
struct buffer_head *di_bh,
struct buffer_head *dir_bh,
struct ocfs2_alloc_context *meta_ac,
struct ocfs2_alloc_context *data_ac)
{
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct posix_acl *acl = NULL;
int ret = 0, ret2;
umode_t mode;
if (!S_ISLNK(inode->i_mode)) {
if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
acl = ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT,
dir_bh);
if (IS_ERR(acl))
return PTR_ERR(acl);
}
if (!acl) {
mode = inode->i_mode & ~current_umask();
ret = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
if (ret) {
mlog_errno(ret);
goto cleanup;
}
}
}
if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
if (S_ISDIR(inode->i_mode)) {
ret = ocfs2_set_acl(handle, inode, di_bh,
ACL_TYPE_DEFAULT, acl,
meta_ac, data_ac);
if (ret)
goto cleanup;
}
mode = inode->i_mode;
ret = __posix_acl_create(&acl, GFP_NOFS, &mode);
if (ret < 0)
return ret;
ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
if (ret2) {
mlog_errno(ret2);
ret = ret2;
goto cleanup;
}
if (ret > 0) {
ret = ocfs2_set_acl(handle, inode,
di_bh, ACL_TYPE_ACCESS,
acl, meta_ac, data_ac);
}
}
cleanup:
posix_acl_release(acl);
return ret;
}
static size_t ocfs2_xattr_list_acl_access(struct dentry *dentry,
char *list,
size_t list_len,
const char *name,
size_t name_len,
int type)
{
struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
return 0;
if (list && size <= list_len)
memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
return size;
}
static size_t ocfs2_xattr_list_acl_default(struct dentry *dentry,
char *list,
size_t list_len,
const char *name,
size_t name_len,
int type)
{
struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
return 0;
if (list && size <= list_len)
memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
return size;
}
static int ocfs2_xattr_get_acl(struct dentry *dentry, const char *name,
void *buffer, size_t size, int type)
{
struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
struct posix_acl *acl;
int ret;
if (strcmp(name, "") != 0)
return -EINVAL;
if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
return -EOPNOTSUPP;
acl = ocfs2_get_acl(dentry->d_inode, type);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl == NULL)
return -ENODATA;
ret = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return ret;
}
static int ocfs2_xattr_set_acl(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags, int type)
{
struct inode *inode = dentry->d_inode;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct posix_acl *acl;
int ret = 0;
if (strcmp(name, "") != 0)
return -EINVAL;
if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
return -EOPNOTSUPP;
if (!inode_owner_or_capable(inode))
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
else if (acl) {
ret = posix_acl_valid(acl);
if (ret)
goto cleanup;
}
} else
acl = NULL;
ret = ocfs2_set_acl(NULL, inode, NULL, type, acl, NULL, NULL);
cleanup:
posix_acl_release(acl);
return ret;
}
const struct xattr_handler ocfs2_xattr_acl_access_handler = {
.prefix = POSIX_ACL_XATTR_ACCESS,
.flags = ACL_TYPE_ACCESS,
.list = ocfs2_xattr_list_acl_access,
.get = ocfs2_xattr_get_acl,
.set = ocfs2_xattr_set_acl,
};
const struct xattr_handler ocfs2_xattr_acl_default_handler = {
.prefix = POSIX_ACL_XATTR_DEFAULT,
.flags = ACL_TYPE_DEFAULT,
.list = ocfs2_xattr_list_acl_default,
.get = ocfs2_xattr_get_acl,
.set = ocfs2_xattr_set_acl,
};

13
fs/ocfs2/acl.h
View File

@ -27,10 +27,13 @@ struct ocfs2_acl_entry {
};
struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type);
extern int ocfs2_acl_chmod(struct inode *);
extern int ocfs2_init_acl(handle_t *, struct inode *, struct inode *,
struct buffer_head *, struct buffer_head *,
struct ocfs2_alloc_context *,
struct ocfs2_alloc_context *);
int ocfs2_iop_set_acl(struct inode *inode, struct posix_acl *acl, int type);
int ocfs2_set_acl(handle_t *handle,
struct inode *inode,
struct buffer_head *di_bh,
int type,
struct posix_acl *acl,
struct ocfs2_alloc_context *meta_ac,
struct ocfs2_alloc_context *data_ac);
#endif /* OCFS2_ACL_H */

4
fs/ocfs2/file.c
View File

@ -1236,7 +1236,7 @@ bail:
dqput(transfer_to[qtype]);
if (!status && attr->ia_valid & ATTR_MODE) {
status = ocfs2_acl_chmod(inode);
status = posix_acl_chmod(inode, inode->i_mode);
if (status < 0)
mlog_errno(status);
}
@ -2661,6 +2661,7 @@ const struct inode_operations ocfs2_file_iops = {
.removexattr = generic_removexattr,
.fiemap = ocfs2_fiemap,
.get_acl = ocfs2_iop_get_acl,
.set_acl = ocfs2_iop_set_acl,
};
const struct inode_operations ocfs2_special_file_iops = {
@ -2668,6 +2669,7 @@ const struct inode_operations ocfs2_special_file_iops = {
.getattr = ocfs2_getattr,
.permission = ocfs2_permission,
.get_acl = ocfs2_iop_get_acl,
.set_acl = ocfs2_iop_set_acl,
};
/*

25
fs/ocfs2/namei.c
View File

@ -230,6 +230,7 @@ static int ocfs2_mknod(struct inode *dir,
struct ocfs2_dir_lookup_result lookup = { NULL, };
sigset_t oldset;
int did_block_signals = 0;
struct posix_acl *default_acl = NULL, *acl = NULL;
trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
(unsigned long long)OCFS2_I(dir)->ip_blkno,
@ -331,6 +332,12 @@ static int ocfs2_mknod(struct inode *dir,
goto leave;
}
status = posix_acl_create(dir, &mode, &default_acl, &acl);
if (status) {
mlog_errno(status);
goto leave;
}
handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
S_ISDIR(mode),
xattr_credits));
@ -379,8 +386,17 @@ static int ocfs2_mknod(struct inode *dir,
inc_nlink(dir);
}
status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
meta_ac, data_ac);
if (default_acl) {
status = ocfs2_set_acl(handle, inode, new_fe_bh,
ACL_TYPE_DEFAULT, default_acl,
meta_ac, data_ac);
}
if (!status && acl) {
status = ocfs2_set_acl(handle, inode, new_fe_bh,
ACL_TYPE_ACCESS, acl,
meta_ac, data_ac);
}
if (status < 0) {
mlog_errno(status);
goto leave;
@ -419,6 +435,10 @@ static int ocfs2_mknod(struct inode *dir,
d_instantiate(dentry, inode);
status = 0;
leave:
if (default_acl)
posix_acl_release(default_acl);
if (acl)
posix_acl_release(acl);
if (status < 0 && did_quota_inode)
dquot_free_inode(inode);
if (handle)
@ -2504,4 +2524,5 @@ const struct inode_operations ocfs2_dir_iops = {
.removexattr = generic_removexattr,
.fiemap = ocfs2_fiemap,
.get_acl = ocfs2_iop_get_acl,
.set_acl = ocfs2_iop_set_acl,
};

19
fs/ocfs2/refcounttree.c
View File

@ -46,6 +46,7 @@
#include <linux/quotaops.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/posix_acl.h>
struct ocfs2_cow_context {
struct inode *inode;
@ -4268,11 +4269,20 @@ static int ocfs2_reflink(struct dentry *old_dentry, struct inode *dir,
struct inode *inode = old_dentry->d_inode;
struct buffer_head *old_bh = NULL;
struct inode *new_orphan_inode = NULL;
struct posix_acl *default_acl, *acl;
umode_t mode;
if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)))
return -EOPNOTSUPP;
error = ocfs2_create_inode_in_orphan(dir, inode->i_mode,
mode = inode->i_mode;
error = posix_acl_create(dir, &mode, &default_acl, &acl);
if (error) {
mlog_errno(error);
goto out;
}
error = ocfs2_create_inode_in_orphan(dir, mode,
&new_orphan_inode);
if (error) {
mlog_errno(error);
@ -4303,11 +4313,16 @@ static int ocfs2_reflink(struct dentry *old_dentry, struct inode *dir,
/* If the security isn't preserved, we need to re-initialize them. */
if (!preserve) {
error = ocfs2_init_security_and_acl(dir, new_orphan_inode,
&new_dentry->d_name);
&new_dentry->d_name,
default_acl, acl);
if (error)
mlog_errno(error);
}
out:
if (default_acl)
posix_acl_release(default_acl);
if (acl)
posix_acl_release(acl);
if (!error) {
error = ocfs2_mv_orphaned_inode_to_new(dir, new_orphan_inode,
new_dentry);

21
fs/ocfs2/xattr.c
View File

@ -99,8 +99,8 @@ static struct ocfs2_xattr_def_value_root def_xv = {
const struct xattr_handler *ocfs2_xattr_handlers[] = {
&ocfs2_xattr_user_handler,
&ocfs2_xattr_acl_access_handler,
&ocfs2_xattr_acl_default_handler,
&posix_acl_access_xattr_handler,
&posix_acl_default_xattr_handler,
&ocfs2_xattr_trusted_handler,
&ocfs2_xattr_security_handler,
NULL
@ -109,9 +109,9 @@ const struct xattr_handler *ocfs2_xattr_handlers[] = {
static const struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
[OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
[OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]
= &ocfs2_xattr_acl_access_handler,
= &posix_acl_access_xattr_handler,
[OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]
= &ocfs2_xattr_acl_default_handler,
= &posix_acl_default_xattr_handler,
[OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
[OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
};
@ -7190,10 +7190,12 @@ out:
*/
int ocfs2_init_security_and_acl(struct inode *dir,
struct inode *inode,
const struct qstr *qstr)
const struct qstr *qstr,
struct posix_acl *default_acl,
struct posix_acl *acl)
{
int ret = 0;
struct buffer_head *dir_bh = NULL;
int ret = 0;
ret = ocfs2_init_security_get(inode, dir, qstr, NULL);
if (ret) {
@ -7207,9 +7209,10 @@ int ocfs2_init_security_and_acl(struct inode *dir,
goto leave;
}
ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL);
if (ret)
mlog_errno(ret);
if (!ret && default_acl)
ret = ocfs2_iop_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
if (!ret && acl)
ret = ocfs2_iop_set_acl(inode, acl, ACL_TYPE_ACCESS);
ocfs2_inode_unlock(dir, 0);
brelse(dir_bh);

6
fs/ocfs2/xattr.h
View File

@ -40,8 +40,6 @@ struct ocfs2_security_xattr_info {
extern const struct xattr_handler ocfs2_xattr_user_handler;
extern const struct xattr_handler ocfs2_xattr_trusted_handler;
extern const struct xattr_handler ocfs2_xattr_security_handler;
extern const struct xattr_handler ocfs2_xattr_acl_access_handler;
extern const struct xattr_handler ocfs2_xattr_acl_default_handler;
extern const struct xattr_handler *ocfs2_xattr_handlers[];
ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
@ -96,5 +94,7 @@ int ocfs2_reflink_xattrs(struct inode *old_inode,
bool preserve_security);
int ocfs2_init_security_and_acl(struct inode *dir,
struct inode *inode,
const struct qstr *qstr);
const struct qstr *qstr,
struct posix_acl *default_acl,
struct posix_acl *acl);
#endif /* OCFS2_XATTR_H */