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fs: make posix_acl_create more useful

Browse source 
Rename the current posix_acl_created to __posix_acl_create and add
a fully featured helper to set up the ACLs on file creation that
uses get_acl().

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2013-12-20 05:16:42 -08:00 committed by Al Viro
parent 5bf3258fd2
commit 37bc15392a
17 changed files with 81 additions and 23 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
fs/9p/acl.c
View file

@ -200,7 +200,7 @@ int v9fs_acl_mode(struct inode *dir, umode_t *modep,
if (acl) {
if (S_ISDIR(mode))
*dpacl = posix_acl_dup(acl);
retval = posix_acl_create(&acl, GFP_NOFS, &mode);
retval = __posix_acl_create(&acl, GFP_NOFS, &mode);
if (retval < 0)
return retval;
if (retval > 0)

2
fs/btrfs/acl.c
View file

@ -222,7 +222,7 @@ int btrfs_init_acl(struct btrfs_trans_handle *trans,
if (ret)
goto failed;
}
ret = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
ret = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
if (ret < 0)
return ret;

2
fs/ext2/acl.c
View file

@ -268,7 +268,7 @@ ext2_init_acl(struct inode *inode, struct inode *dir)
if (error)
goto cleanup;
}
error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
if (error < 0)
return error;
if (error > 0) {

2
fs/ext3/acl.c
View file

@ -271,7 +271,7 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
if (error)
goto cleanup;
}
error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
if (error < 0)
return error;

2
fs/ext4/acl.c
View file

@ -276,7 +276,7 @@ ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
if (error)
goto cleanup;
}
error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
if (error < 0)
return error;

2
fs/f2fs/acl.c
View file

@ -285,7 +285,7 @@ int f2fs_init_acl(struct inode *inode, struct inode *dir, struct page *ipage)
if (error)
goto cleanup;
}
error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
if (error < 0)
return error;
if (error > 0)

2
fs/generic_acl.c
View file

@ -128,7 +128,7 @@ generic_acl_init(struct inode *inode, struct inode *dir)
if (acl) {
if (S_ISDIR(inode->i_mode))
set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
if (error < 0)
return error;
if (error > 0)

2
fs/gfs2/acl.c
View file

@ -131,7 +131,7 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
goto out;
}
error = posix_acl_create(&acl, GFP_NOFS, &mode);
error = __posix_acl_create(&acl, GFP_NOFS, &mode);
if (error < 0)
return error;

2
fs/hfsplus/posix_acl.c
View file

@ -137,7 +137,7 @@ int hfsplus_init_posix_acl(struct inode *inode, struct inode *dir)
goto init_acl_cleanup;
}
err = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
if (unlikely(err < 0))
return err;

2
fs/jffs2/acl.c
View file

@ -295,7 +295,7 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, umode_t *i_mode
if (S_ISDIR(*i_mode))
set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
rc = posix_acl_create(&acl, GFP_KERNEL, i_mode);
rc = __posix_acl_create(&acl, GFP_KERNEL, i_mode);
if (rc < 0)
return rc;
if (rc > 0)

2
fs/jfs/acl.c
View file

@ -132,7 +132,7 @@ int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
if (rc)
goto cleanup;
}
rc = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
rc = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
if (rc < 0)
goto cleanup; /* posix_acl_release(NULL) is no-op */
if (rc > 0)

2
fs/nfs/nfs3acl.c
View file

@ -428,7 +428,7 @@ int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
if (!dfacl)
return 0;
acl = posix_acl_dup(dfacl);
error = posix_acl_create(&acl, GFP_KERNEL, &mode);
error = __posix_acl_create(&acl, GFP_KERNEL, &mode);
if (error < 0)
goto out_release_dfacl;
error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ?

2
fs/ocfs2/acl.c
View file

@ -401,7 +401,7 @@ int ocfs2_init_acl(handle_t *handle,
goto cleanup;
}
mode = inode->i_mode;
ret = posix_acl_create(&acl, GFP_NOFS, &mode);
ret = __posix_acl_create(&acl, GFP_NOFS, &mode);
if (ret < 0)
return ret;

57
fs/posix_acl.c
View file

@ -410,7 +410,7 @@ static int __posix_acl_chmod_masq(struct posix_acl *acl, umode_t mode)
}
int
posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
__posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
{
struct posix_acl *clone = posix_acl_clone(*acl, gfp);
int err = -ENOMEM;
@ -425,7 +425,7 @@ posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
*acl = clone;
return err;
}
EXPORT_SYMBOL(posix_acl_create);
EXPORT_SYMBOL(__posix_acl_create);
int
__posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
@ -446,7 +446,7 @@ __posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
EXPORT_SYMBOL(__posix_acl_chmod);
int
posix_acl_chmod(struct inode *inode)
posix_acl_chmod(struct inode *inode, umode_t mode)
{
struct posix_acl *acl;
int ret = 0;
@ -460,7 +460,7 @@ posix_acl_chmod(struct inode *inode)
if (IS_ERR_OR_NULL(acl))
return PTR_ERR(acl);
ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
ret = __posix_acl_chmod(&acl, GFP_KERNEL, mode);
if (ret)
return ret;
ret = inode->i_op->set_acl(inode, acl, ACL_TYPE_ACCESS);
@ -469,6 +469,55 @@ posix_acl_chmod(struct inode *inode)
}
EXPORT_SYMBOL(posix_acl_chmod);
int
posix_acl_create(struct inode *dir, umode_t *mode,
struct posix_acl **default_acl, struct posix_acl **acl)
{
struct posix_acl *p;
int ret;
if (S_ISLNK(*mode) || !IS_POSIXACL(dir))
goto no_acl;
p = get_acl(dir, ACL_TYPE_DEFAULT);
if (IS_ERR(p))
return PTR_ERR(p);
if (!p) {
*mode &= ~current_umask();
goto no_acl;
}
*acl = posix_acl_clone(p, GFP_NOFS);
if (!*acl)
return -ENOMEM;
ret = posix_acl_create_masq(*acl, mode);
if (ret < 0) {
posix_acl_release(*acl);
return -ENOMEM;
}
if (ret == 0) {
posix_acl_release(*acl);
*acl = NULL;
}
if (!S_ISDIR(*mode)) {
posix_acl_release(p);
*default_acl = NULL;
} else {
*default_acl = p;
}
return 0;
no_acl:
*default_acl = NULL;
*acl = NULL;
return 0;
}
EXPORT_SYMBOL_GPL(posix_acl_create);
/*
* Fix up the uids and gids in posix acl extended attributes in place.
*/

2
fs/reiserfs/xattr_acl.c
View file

@ -378,7 +378,7 @@ reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
/* Now we reconcile the new ACL and the mode,
potentially modifying both */
err = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
if (err < 0)
return err;

4
fs/xfs/xfs_acl.c
View file

@ -297,12 +297,12 @@ xfs_inherit_acl(struct inode *inode, struct posix_acl *acl)
goto out;
}
error = posix_acl_create(&acl, GFP_KERNEL, &mode);
error = __posix_acl_create(&acl, GFP_KERNEL, &mode);
if (error < 0)
return error;
/*
* If posix_acl_create returns a positive value we need to
* If __posix_acl_create returns a positive value we need to
* inherit a permission that can't be represented using the Unix
* mode bits and we actually need to set an ACL.
*/

15
include/linux/posix_acl.h
View file

@ -88,14 +88,16 @@ extern int posix_acl_valid(const struct posix_acl *);
extern int posix_acl_permission(struct inode *, const struct posix_acl *, int);
extern struct posix_acl *posix_acl_from_mode(umode_t, gfp_t);
extern int posix_acl_equiv_mode(const struct posix_acl *, umode_t *);
extern int posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t);
extern struct posix_acl *get_posix_acl(struct inode *, int);
extern int set_posix_acl(struct inode *, int, struct posix_acl *);
#ifdef CONFIG_FS_POSIX_ACL
extern int posix_acl_chmod(struct inode *);
extern int posix_acl_chmod(struct inode *, umode_t);
extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **,
struct posix_acl **);
static inline struct posix_acl **acl_by_type(struct inode *inode, int type)
{
@ -174,7 +176,7 @@ static inline void cache_no_acl(struct inode *inode)
inode->i_default_acl = NULL;
}
#else
static inline int posix_acl_chmod(struct inode *inode)
static inline int posix_acl_chmod(struct inode *inode, umode_t mode)
{
return 0;
}
@ -182,6 +184,13 @@ static inline int posix_acl_chmod(struct inode *inode)
static inline void cache_no_acl(struct inode *inode)
{
}
static inline int posix_acl_create(struct inode *inode, umode_t *mode,
struct posix_acl **default_acl, struct posix_acl **acl)
{
*default_acl = *acl = NULL;
return 0;
}
#endif /* CONFIG_FS_POSIX_ACL */
struct posix_acl *get_acl(struct inode *inode, int type);