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authorJan Kara <jack@suse.cz>2016-05-26 16:55:18 +0200
committerJan Kara <jack@suse.cz>2016-09-22 10:56:19 +0200
commit31051c85b5e2aaaf6315f74c72a732673632a905 (patch)
treea3bdc58adf95cd02276f44188f6b33c9f06f5e1a /fs/attr.c
parentfuse: Propagate dentry down to inode_change_ok() (diff)
downloadlinux-31051c85b5e2aaaf6315f74c72a732673632a905.tar.xz
linux-31051c85b5e2aaaf6315f74c72a732673632a905.zip
fs: Give dentry to inode_change_ok() instead of inode
inode_change_ok() will be resposible for clearing capabilities and IMA extended attributes and as such will need dentry. Give it as an argument to inode_change_ok() instead of an inode. Also rename inode_change_ok() to setattr_prepare() to better relect that it does also some modifications in addition to checks. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/attr.c')
-rw-r--r--fs/attr.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/fs/attr.c b/fs/attr.c
index 42bb42bb3c72..5c45909ea204 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -17,19 +17,22 @@
#include <linux/ima.h>
/**
- * inode_change_ok - check if attribute changes to an inode are allowed
- * @inode: inode to check
+ * setattr_prepare - check if attribute changes to a dentry are allowed
+ * @dentry: dentry to check
* @attr: attributes to change
*
* Check if we are allowed to change the attributes contained in @attr
- * in the given inode. This includes the normal unix access permission
- * checks, as well as checks for rlimits and others.
+ * in the given dentry. This includes the normal unix access permission
+ * checks, as well as checks for rlimits and others. The function also clears
+ * SGID bit from mode if user is not allowed to set it. Also file capabilities
+ * and IMA extended attributes are cleared if ATTR_KILL_PRIV is set.
*
* Should be called as the first thing in ->setattr implementations,
* possibly after taking additional locks.
*/
-int inode_change_ok(const struct inode *inode, struct iattr *attr)
+int setattr_prepare(struct dentry *dentry, struct iattr *attr)
{
+ struct inode *inode = d_inode(dentry);
unsigned int ia_valid = attr->ia_valid;
/*
@@ -79,7 +82,7 @@ int inode_change_ok(const struct inode *inode, struct iattr *attr)
return 0;
}
-EXPORT_SYMBOL(inode_change_ok);
+EXPORT_SYMBOL(setattr_prepare);
/**
* inode_newsize_ok - may this inode be truncated to a given size