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authorAl Viro <viro@zeniv.linux.org.uk>2016-05-27 18:06:05 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2016-05-28 03:09:16 +0300
commit3767e255b390d72f9a33c08d9e86c5f21f25860f (patch)
tree519dcbb61591a2ad94c36d3896e4787074e4813d /fs/ecryptfs
parent5930122683dff58f0846b0f0405b4bd598a3ba6a (diff)
downloadlinux-3767e255b390d72f9a33c08d9e86c5f21f25860f.tar.xz
switch ->setxattr() to passing dentry and inode separately
smack ->d_instantiate() uses ->setxattr(), so to be able to call it before we'd hashed the new dentry and attached it to inode, we need ->setxattr() instances getting the inode as an explicit argument rather than obtaining it from dentry. Similar change for ->getxattr() had been done in commit ce23e64. Unlike ->getxattr() (which is used by both selinux and smack instances of ->d_instantiate()) ->setxattr() is used only by smack one and unfortunately it got missed back then. Reported-by: Seung-Woo Kim <sw0312.kim@samsung.com> Tested-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ecryptfs')
-rw-r--r--fs/ecryptfs/crypto.c9
-rw-r--r--fs/ecryptfs/ecryptfs_kernel.h4
-rw-r--r--fs/ecryptfs/inode.c7
-rw-r--r--fs/ecryptfs/mmap.c3
4 files changed, 13 insertions, 10 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index ebd40f46ed4c..0d8eb3455b34 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1141,12 +1141,13 @@ ecryptfs_write_metadata_to_contents(struct inode *ecryptfs_inode,
static int
ecryptfs_write_metadata_to_xattr(struct dentry *ecryptfs_dentry,
+ struct inode *ecryptfs_inode,
char *page_virt, size_t size)
{
int rc;
- rc = ecryptfs_setxattr(ecryptfs_dentry, ECRYPTFS_XATTR_NAME, page_virt,
- size, 0);
+ rc = ecryptfs_setxattr(ecryptfs_dentry, ecryptfs_inode,
+ ECRYPTFS_XATTR_NAME, page_virt, size, 0);
return rc;
}
@@ -1215,8 +1216,8 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry,
goto out_free;
}
if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
- rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry, virt,
- size);
+ rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry, ecryptfs_inode,
+ virt, size);
else
rc = ecryptfs_write_metadata_to_contents(ecryptfs_inode, virt,
virt_len);
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 3ec495db7e82..4ba1547bb9ad 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -609,8 +609,8 @@ ssize_t
ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode,
const char *name, void *value, size_t size);
int
-ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
- size_t size, int flags);
+ecryptfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
+ const void *value, size_t size, int flags);
int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
#ifdef CONFIG_ECRYPT_FS_MESSAGING
int ecryptfs_process_response(struct ecryptfs_daemon *daemon,
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 318b04689d76..9d153b6a1d72 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -1001,7 +1001,8 @@ static int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
}
int
-ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
+ecryptfs_setxattr(struct dentry *dentry, struct inode *inode,
+ const char *name, const void *value,
size_t size, int flags)
{
int rc = 0;
@@ -1014,8 +1015,8 @@ ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
}
rc = vfs_setxattr(lower_dentry, name, value, size, flags);
- if (!rc && d_really_is_positive(dentry))
- fsstack_copy_attr_all(d_inode(dentry), d_inode(lower_dentry));
+ if (!rc && inode)
+ fsstack_copy_attr_all(inode, d_inode(lower_dentry));
out:
return rc;
}
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 148d11b514fb..9c3437c8a5b1 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -442,7 +442,8 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *ecryptfs_inode)
if (size < 0)
size = 8;
put_unaligned_be64(i_size_read(ecryptfs_inode), xattr_virt);
- rc = lower_inode->i_op->setxattr(lower_dentry, ECRYPTFS_XATTR_NAME,
+ rc = lower_inode->i_op->setxattr(lower_dentry, lower_inode,
+ ECRYPTFS_XATTR_NAME,
xattr_virt, size, 0);
inode_unlock(lower_inode);
if (rc)