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authorChristoph Hellwig <hch@infradead.org>2013-12-20 14:16:41 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2014-01-26 05:58:18 +0100
commit5bf3258fd2acd8515450ab8efcd97c9d3b69f7f9 (patch)
tree117a3aba664aa9859cc346bdedbaf1c54c39d7a1 /fs/posix_acl.c
parentfs: add generic xattr_acl handlers (diff)
downloadlinux-5bf3258fd2acd8515450ab8efcd97c9d3b69f7f9.tar.xz
linux-5bf3258fd2acd8515450ab8efcd97c9d3b69f7f9.zip
fs: make posix_acl_chmod more useful
Rename the current posix_acl_chmod to __posix_acl_chmod and add a fully featured ACL chmod helper that uses the ->set_acl inode operation. 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>
Diffstat (limited to 'fs/posix_acl.c')
-rw-r--r--fs/posix_acl.c30
1 files changed, 27 insertions, 3 deletions
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index e699b076cdd8..08218550b0db 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -364,7 +364,7 @@ static int posix_acl_create_masq(struct posix_acl *acl, umode_t *mode_p)
/*
* Modify the ACL for the chmod syscall.
*/
-static int posix_acl_chmod_masq(struct posix_acl *acl, umode_t mode)
+static int __posix_acl_chmod_masq(struct posix_acl *acl, umode_t mode)
{
struct posix_acl_entry *group_obj = NULL, *mask_obj = NULL;
struct posix_acl_entry *pa, *pe;
@@ -428,12 +428,12 @@ posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
EXPORT_SYMBOL(posix_acl_create);
int
-posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
+__posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
{
struct posix_acl *clone = posix_acl_clone(*acl, gfp);
int err = -ENOMEM;
if (clone) {
- err = posix_acl_chmod_masq(clone, mode);
+ err = __posix_acl_chmod_masq(clone, mode);
if (err) {
posix_acl_release(clone);
clone = NULL;
@@ -443,6 +443,30 @@ posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
*acl = clone;
return err;
}
+EXPORT_SYMBOL(__posix_acl_chmod);
+
+int
+posix_acl_chmod(struct inode *inode)
+{
+ struct posix_acl *acl;
+ int ret = 0;
+
+ if (!IS_POSIXACL(inode))
+ return 0;
+ if (!inode->i_op->set_acl)
+ return -EOPNOTSUPP;
+
+ acl = get_acl(inode, ACL_TYPE_ACCESS);
+ if (IS_ERR_OR_NULL(acl))
+ return PTR_ERR(acl);
+
+ ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+ if (ret)
+ return ret;
+ ret = inode->i_op->set_acl(inode, acl, ACL_TYPE_ACCESS);
+ posix_acl_release(acl);
+ return ret;
+}
EXPORT_SYMBOL(posix_acl_chmod);
/*