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switch ->setxattr() to passing dentry and inode separately

Browse source 
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 <[email protected]>
Tested-by: Casey Schaufler <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2016-05-27 11:06:05 -04:00
commit 3767e255b3
20 changed files with 59 additions and 44 deletions
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9
fs/ecryptfs/crypto.c
View file

@ -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);

4
fs/ecryptfs/ecryptfs_kernel.h
View file

@ -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,

7
fs/ecryptfs/inode.c
View file

@ -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;
}

3
fs/ecryptfs/mmap.c
View file

@ -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)