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Diffstat (limited to 'mm/shmem.c')
-rw-r--r--mm/shmem.c84
1 files changed, 47 insertions, 37 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 356dd99566ec..eef4ebea5158 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -29,7 +29,6 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/swap.h>
-#include <linux/ima.h>
static struct vfsmount *shm_mnt;
@@ -42,6 +41,7 @@ static struct vfsmount *shm_mnt;
#include <linux/xattr.h>
#include <linux/exportfs.h>
+#include <linux/posix_acl.h>
#include <linux/generic_acl.h>
#include <linux/mman.h>
#include <linux/string.h>
@@ -810,7 +810,7 @@ static int shmem_notify_change(struct dentry *dentry, struct iattr *attr)
error = inode_setattr(inode, attr);
#ifdef CONFIG_TMPFS_POSIX_ACL
if (!error && (attr->ia_valid & ATTR_MODE))
- error = generic_acl_chmod(inode, &shmem_acl_ops);
+ error = generic_acl_chmod(inode);
#endif
if (page)
page_cache_release(page);
@@ -1017,7 +1017,14 @@ int shmem_unuse(swp_entry_t entry, struct page *page)
goto out;
}
mutex_unlock(&shmem_swaplist_mutex);
-out: return found; /* 0 or 1 or -ENOMEM */
+ /*
+ * Can some race bring us here? We've been holding page lock,
+ * so I think not; but would rather try again later than BUG()
+ */
+ unlock_page(page);
+ page_cache_release(page);
+out:
+ return (found < 0) ? found : 0;
}
/*
@@ -1080,7 +1087,7 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
else
inode = NULL;
spin_unlock(&info->lock);
- swap_duplicate(swap);
+ swap_shmem_alloc(swap);
BUG_ON(page_mapped(page));
page_cache_release(page); /* pagecache ref */
swap_writepage(page, wbc);
@@ -1817,11 +1824,15 @@ shmem_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
return error;
}
}
- error = shmem_acl_init(inode, dir);
+#ifdef CONFIG_TMPFS_POSIX_ACL
+ error = generic_acl_init(inode, dir);
if (error) {
iput(inode);
return error;
}
+#else
+ error = 0;
+#endif
if (dir->i_mode & S_ISGID) {
inode->i_gid = dir->i_gid;
if (S_ISDIR(mode))
@@ -2036,27 +2047,28 @@ static const struct inode_operations shmem_symlink_inode_operations = {
* filesystem level, though.
*/
-static size_t shmem_xattr_security_list(struct inode *inode, char *list,
+static size_t shmem_xattr_security_list(struct dentry *dentry, char *list,
size_t list_len, const char *name,
- size_t name_len)
+ size_t name_len, int handler_flags)
{
- return security_inode_listsecurity(inode, list, list_len);
+ return security_inode_listsecurity(dentry->d_inode, list, list_len);
}
-static int shmem_xattr_security_get(struct inode *inode, const char *name,
- void *buffer, size_t size)
+static int shmem_xattr_security_get(struct dentry *dentry, const char *name,
+ void *buffer, size_t size, int handler_flags)
{
if (strcmp(name, "") == 0)
return -EINVAL;
- return xattr_getsecurity(inode, name, buffer, size);
+ return xattr_getsecurity(dentry->d_inode, name, buffer, size);
}
-static int shmem_xattr_security_set(struct inode *inode, const char *name,
- const void *value, size_t size, int flags)
+static int shmem_xattr_security_set(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags, int handler_flags)
{
if (strcmp(name, "") == 0)
return -EINVAL;
- return security_inode_setsecurity(inode, name, value, size, flags);
+ return security_inode_setsecurity(dentry->d_inode, name, value,
+ size, flags);
}
static struct xattr_handler shmem_xattr_security_handler = {
@@ -2067,8 +2079,8 @@ static struct xattr_handler shmem_xattr_security_handler = {
};
static struct xattr_handler *shmem_xattr_handlers[] = {
- &shmem_xattr_acl_access_handler,
- &shmem_xattr_acl_default_handler,
+ &generic_acl_access_handler,
+ &generic_acl_default_handler,
&shmem_xattr_security_handler,
NULL
};
@@ -2447,7 +2459,7 @@ static const struct inode_operations shmem_inode_operations = {
.getxattr = generic_getxattr,
.listxattr = generic_listxattr,
.removexattr = generic_removexattr,
- .check_acl = shmem_check_acl,
+ .check_acl = generic_check_acl,
#endif
};
@@ -2470,7 +2482,7 @@ static const struct inode_operations shmem_dir_inode_operations = {
.getxattr = generic_getxattr,
.listxattr = generic_listxattr,
.removexattr = generic_removexattr,
- .check_acl = shmem_check_acl,
+ .check_acl = generic_check_acl,
#endif
};
@@ -2481,7 +2493,7 @@ static const struct inode_operations shmem_special_inode_operations = {
.getxattr = generic_getxattr,
.listxattr = generic_listxattr,
.removexattr = generic_removexattr,
- .check_acl = shmem_check_acl,
+ .check_acl = generic_check_acl,
#endif
};
@@ -2619,7 +2631,8 @@ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags
int error;
struct file *file;
struct inode *inode;
- struct dentry *dentry, *root;
+ struct path path;
+ struct dentry *root;
struct qstr this;
if (IS_ERR(shm_mnt))
@@ -2636,38 +2649,35 @@ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags
this.len = strlen(name);
this.hash = 0; /* will go */
root = shm_mnt->mnt_root;
- dentry = d_alloc(root, &this);
- if (!dentry)
+ path.dentry = d_alloc(root, &this);
+ if (!path.dentry)
goto put_memory;
-
- error = -ENFILE;
- file = get_empty_filp();
- if (!file)
- goto put_dentry;
+ path.mnt = mntget(shm_mnt);
error = -ENOSPC;
inode = shmem_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0, flags);
if (!inode)
- goto close_file;
+ goto put_dentry;
- d_instantiate(dentry, inode);
+ d_instantiate(path.dentry, inode);
inode->i_size = size;
inode->i_nlink = 0; /* It is unlinked */
- init_file(file, shm_mnt, dentry, FMODE_WRITE | FMODE_READ,
- &shmem_file_operations);
-
#ifndef CONFIG_MMU
error = ramfs_nommu_expand_for_mapping(inode, size);
if (error)
- goto close_file;
+ goto put_dentry;
#endif
- ima_counts_get(file);
+
+ error = -ENFILE;
+ file = alloc_file(&path, FMODE_WRITE | FMODE_READ,
+ &shmem_file_operations);
+ if (!file)
+ goto put_dentry;
+
return file;
-close_file:
- put_filp(file);
put_dentry:
- dput(dentry);
+ path_put(&path);
put_memory:
shmem_unacct_size(flags, size);
return ERR_PTR(error);