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fs: make posix_acl_create more useful

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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
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57
fs/posix_acl.c
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@@ -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.
*/