Commit b65a9cfc authored by Al Viro's avatar Al Viro
Browse files

Untangling ima mess, part 2: deal with counters



* do ima_get_count() in __dentry_open()
* stop doing that in followups
* move ima_path_check() to right after nameidata_to_filp()
* don't bump counters on it
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 0552f879
......@@ -11,7 +11,6 @@
#include <linux/mount.h>
#include <linux/file.h>
#include <linux/ima.h>
#include "internal.h"
/*
......@@ -923,7 +922,6 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
if (IS_ERR(file)) {
ret = PTR_ERR(file);
} else {
ima_counts_get(file);
ret = -EIO;
if (file->f_op->write) {
pos = (loff_t) page->index << PAGE_SHIFT;
......
......@@ -35,7 +35,6 @@
#include <linux/key.h>
#include <linux/parser.h>
#include <linux/fs_stack.h>
#include <linux/ima.h>
#include "ecryptfs_kernel.h"
/**
......@@ -119,7 +118,6 @@ int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
const struct cred *cred = current_cred();
struct ecryptfs_inode_info *inode_info =
ecryptfs_inode_to_private(ecryptfs_dentry->d_inode);
int opened_lower_file = 0;
int rc = 0;
mutex_lock(&inode_info->lower_file_mutex);
......@@ -136,12 +134,9 @@ int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
"for lower_dentry [0x%p] and lower_mnt [0x%p]; "
"rc = [%d]\n", lower_dentry, lower_mnt, rc);
inode_info->lower_file = NULL;
} else
opened_lower_file = 1;
}
}
mutex_unlock(&inode_info->lower_file_mutex);
if (opened_lower_file)
ima_counts_get(inode_info->lower_file);
return rc;
}
......
......@@ -1461,14 +1461,7 @@ int may_open(struct path *path, int acc_mode, int flag)
/*
* Ensure there are no outstanding leases on the file.
*/
error = break_lease(inode, flag);
if (error)
return error;
return ima_path_check(path, acc_mode ?
acc_mode & (MAY_READ | MAY_WRITE | MAY_EXEC) :
ACC_MODE(flag) & (MAY_READ | MAY_WRITE),
IMA_COUNT_UPDATE);
return break_lease(inode, flag);
}
static int handle_truncate(struct path *path)
......@@ -1688,13 +1681,17 @@ struct file *do_filp_open(int dfd, const char *pathname,
goto exit;
}
filp = nameidata_to_filp(&nd, open_flag);
if (IS_ERR(filp))
ima_counts_put(&nd.path,
acc_mode & (MAY_READ | MAY_WRITE |
MAY_EXEC));
mnt_drop_write(nd.path.mnt);
if (nd.root.mnt)
path_put(&nd.root);
if (!IS_ERR(filp)) {
error = ima_path_check(&filp->f_path, filp->f_mode &
(MAY_READ | MAY_WRITE | MAY_EXEC), 0);
if (error) {
fput(filp);
filp = ERR_PTR(error);
}
}
return filp;
}
......@@ -1748,27 +1745,24 @@ struct file *do_filp_open(int dfd, const char *pathname,
goto exit;
}
filp = nameidata_to_filp(&nd, open_flag);
if (IS_ERR(filp)) {
ima_counts_put(&nd.path,
acc_mode & (MAY_READ | MAY_WRITE | MAY_EXEC));
if (will_truncate)
mnt_drop_write(nd.path.mnt);
if (nd.root.mnt)
path_put(&nd.root);
return filp;
}
if (acc_mode & MAY_WRITE)
vfs_dq_init(nd.path.dentry->d_inode);
if (will_truncate) {
error = handle_truncate(&nd.path);
if (!IS_ERR(filp)) {
error = ima_path_check(&filp->f_path, filp->f_mode &
(MAY_READ | MAY_WRITE | MAY_EXEC), 0);
if (error) {
mnt_drop_write(nd.path.mnt);
fput(filp);
if (nd.root.mnt)
path_put(&nd.root);
return ERR_PTR(error);
filp = ERR_PTR(error);
}
}
if (!IS_ERR(filp)) {
if (acc_mode & MAY_WRITE)
vfs_dq_init(nd.path.dentry->d_inode);
if (will_truncate) {
error = handle_truncate(&nd.path);
if (error) {
fput(filp);
filp = ERR_PTR(error);
}
}
}
/*
......
......@@ -744,8 +744,6 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
flags, current_cred());
if (IS_ERR(*filp))
host_err = PTR_ERR(*filp);
else
ima_counts_get(*filp);
out_nfserr:
err = nfserrno(host_err);
out:
......
......@@ -30,6 +30,7 @@
#include <linux/audit.h>
#include <linux/falloc.h>
#include <linux/fs_struct.h>
#include <linux/ima.h>
#include "internal.h"
......@@ -857,6 +858,7 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
if (error)
goto cleanup_all;
}
ima_counts_get(f);
f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC);
......
......@@ -32,7 +32,6 @@
#include <linux/nsproxy.h>
#include <linux/pid.h>
#include <linux/ipc_namespace.h>
#include <linux/ima.h>
#include <net/sock.h>
#include "util.h"
......@@ -734,7 +733,6 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, mode_t, mode,
error = PTR_ERR(filp);
goto out_putfd;
}
ima_counts_get(filp);
fd_install(fd, filp);
goto out_upsem;
......
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