[PATCH 06/18] fs: make posix_acl_create more useful

Christoph Hellwig
2013-12-01T12:07:09Z

[-- Attachment #1: 0006-fs-make-posix_acl_create-more-useful.patch --]
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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>
---
fs/9p/acl.c | 2 +-
fs/btrfs/acl.c | 2 +-
fs/ext2/acl.c | 2 +-
fs/ext3/acl.c | 2 +-
fs/ext4/acl.c | 2 +-
fs/f2fs/acl.c | 2 +-
fs/generic_acl.c | 2 +-
fs/gfs2/acl.c | 2 +-
fs/hfsplus/posix_acl.c | 2 +-
fs/jffs2/acl.c | 2 +-
fs/jfs/acl.c | 2 +-
fs/nfs/nfs3acl.c | 2 +-
fs/ocfs2/acl.c | 2 +-
fs/posix_acl.c | 53 +++++++++++++++++++++++++++++++++++++++++++--
fs/reiserfs/xattr_acl.c | 2 +-
fs/xfs/xfs_acl.c | 4 ++--
include/linux/posix_acl.h | 6 ++++-
17 files changed, 72 insertions(+), 19 deletions(-)

diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index f5ce5c5..8482f2d 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -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)
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 1af04ff..b56519d 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -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;

diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index 7006ced..6e842a7 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -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) {
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index 6691a6c..4f3d8fa 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -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;

diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 2eebe02..f827f3b 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -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;

diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c
index 14c4df0..45e8430 100644
--- a/fs/f2fs/acl.c
+++ b/fs/f2fs/acl.c
@@ -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)
diff --git a/fs/generic_acl.c b/fs/generic_acl.c
index 46a5076..4357f39 100644
--- a/fs/generic_acl.c
+++ b/fs/generic_acl.c
@@ -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)
diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 3e200c7..e82e4ac 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -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;

diff --git a/fs/hfsplus/posix_acl.c b/fs/hfsplus/posix_acl.c
index cab5fd6..277942f 100644
--- a/fs/hfsplus/posix_acl.c
+++ b/fs/hfsplus/posix_acl.c
@@ -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;

diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
index 5853969..4d6e31b 100644
--- a/fs/jffs2/acl.c
+++ b/fs/jffs2/acl.c
@@ -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)
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index 9c0fca8..28d529a 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -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)
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 4a1aafb..e859675 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -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) ?
diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index 73ccf0e..c0f9d2f 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -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;

diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 9f76aaa..38d6a49 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -384,7 +384,7 @@ 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;
@@ -399,7 +399,7 @@ 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)
@@ -443,6 +443,55 @@ 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);
+
struct posix_acl *get_acl(struct inode *inode, int type)
{
struct posix_acl *acl;
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index ea4e443..d95c959 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -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;

diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index 4eac105..057ae2d 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -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.
*/
diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
index 8b64e78..9ec6b45 100644
--- a/include/linux/posix_acl.h
+++ b/include/linux/posix_acl.h
@@ -88,14 +88,18 @@ 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 int posix_acl_prepare(struct inode *dir, struct inode *inode,
+ umode_t *mode);

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_create(struct inode *, umode_t *, struct posix_acl **,
+ struct posix_acl **);

static inline struct posix_acl **acl_by_type(struct inode *inode, int type)
{
--
1.7.10.4