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-rw-r--r--ipc/shm.c43
1 files changed, 24 insertions, 19 deletions
diff --git a/ipc/shm.c b/ipc/shm.c
index 464694e0aa4..23256b85581 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -39,7 +39,6 @@
#include <linux/nsproxy.h>
#include <linux/mount.h>
#include <linux/ipc_namespace.h>
-#include <linux/ima.h>
#include <asm/uaccess.h>
@@ -101,6 +100,7 @@ static void do_shm_rmid(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)
void shm_exit_ns(struct ipc_namespace *ns)
{
free_ipcs(ns, &shm_ids(ns), do_shm_rmid);
+ idr_destroy(&ns->ids[IPC_SHM_IDS].ipcs_idr);
}
#endif
@@ -290,28 +290,31 @@ static unsigned long shm_get_unmapped_area(struct file *file,
unsigned long flags)
{
struct shm_file_data *sfd = shm_file_data(file);
- return get_unmapped_area(sfd->file, addr, len, pgoff, flags);
-}
-
-int is_file_shm_hugepages(struct file *file)
-{
- int ret = 0;
-
- if (file->f_op == &shm_file_operations) {
- struct shm_file_data *sfd;
- sfd = shm_file_data(file);
- ret = is_file_hugepages(sfd->file);
- }
- return ret;
+ return sfd->file->f_op->get_unmapped_area(sfd->file, addr, len,
+ pgoff, flags);
}
static const struct file_operations shm_file_operations = {
.mmap = shm_mmap,
.fsync = shm_fsync,
.release = shm_release,
+#ifndef CONFIG_MMU
+ .get_unmapped_area = shm_get_unmapped_area,
+#endif
+};
+
+static const struct file_operations shm_file_operations_huge = {
+ .mmap = shm_mmap,
+ .fsync = shm_fsync,
+ .release = shm_release,
.get_unmapped_area = shm_get_unmapped_area,
};
+int is_file_shm_hugepages(struct file *file)
+{
+ return file->f_op == &shm_file_operations_huge;
+}
+
static const struct vm_operations_struct shm_vm_ops = {
.open = shm_open, /* callback for a new vm-area open */
.close = shm_close, /* callback for when the vm-area is released */
@@ -878,8 +881,8 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
if (err)
goto out_unlock;
- path.dentry = dget(shp->shm_file->f_path.dentry);
- path.mnt = shp->shm_file->f_path.mnt;
+ path = shp->shm_file->f_path;
+ path_get(&path);
shp->shm_nattch++;
size = i_size_read(path.dentry->d_inode);
shm_unlock(shp);
@@ -889,10 +892,12 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
if (!sfd)
goto out_put_dentry;
- file = alloc_file(path.mnt, path.dentry, f_mode, &shm_file_operations);
+ file = alloc_file(&path, f_mode,
+ is_file_hugepages(shp->shm_file) ?
+ &shm_file_operations_huge :
+ &shm_file_operations);
if (!file)
goto out_free;
- ima_counts_get(file);
file->private_data = sfd;
file->f_mapping = shp->shm_file->f_mapping;
@@ -947,7 +952,7 @@ out_unlock:
out_free:
kfree(sfd);
out_put_dentry:
- dput(path.dentry);
+ path_put(&path);
goto out_nattch;
}