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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-19 10:42:02 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-19 10:42:02 -0700 |
commit | 933a90bf4f3505f8ec83bda21a3c7d70d7c2b426 (patch) | |
tree | ca81c209000a15670e3582760ad9bae1a9cde215 /fs/namespace.c | |
parent | 5f4fc6d440d77a2cf74fe4ea56955674ac7e35e7 (diff) | |
parent | 037f11b4752f717201143a1dc5d6acf3cb71ddfa (diff) |
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs mount updates from Al Viro:
"The first part of mount updates.
Convert filesystems to use the new mount API"
* 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
mnt_init(): call shmem_init() unconditionally
constify ksys_mount() string arguments
don't bother with registering rootfs
init_rootfs(): don't bother with init_ramfs_fs()
vfs: Convert smackfs to use the new mount API
vfs: Convert selinuxfs to use the new mount API
vfs: Convert securityfs to use the new mount API
vfs: Convert apparmorfs to use the new mount API
vfs: Convert openpromfs to use the new mount API
vfs: Convert xenfs to use the new mount API
vfs: Convert gadgetfs to use the new mount API
vfs: Convert oprofilefs to use the new mount API
vfs: Convert ibmasmfs to use the new mount API
vfs: Convert qib_fs/ipathfs to use the new mount API
vfs: Convert efivarfs to use the new mount API
vfs: Convert configfs to use the new mount API
vfs: Convert binfmt_misc to use the new mount API
convenience helper: get_tree_single()
convenience helper get_tree_nodev()
vfs: Kill sget_userns()
...
Diffstat (limited to 'fs/namespace.c')
-rw-r--r-- | fs/namespace.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 6fbc9126367a..f0d664adb9ba 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -29,6 +29,7 @@ #include <linux/sched/task.h> #include <uapi/linux/mount.h> #include <linux/fs_context.h> +#include <linux/shmem_fs.h> #include "pnode.h" #include "internal.h" @@ -2788,6 +2789,8 @@ static int do_new_mount(struct path *path, const char *fstype, int sb_flags, err = vfs_parse_fs_string(fc, "source", name, strlen(name)); if (!err) err = parse_monolithic_mount_data(fc, data); + if (!err && !mount_capable(fc)) + err = -EPERM; if (!err) err = vfs_get_tree(fc); if (!err) @@ -3295,8 +3298,8 @@ struct dentry *mount_subtree(struct vfsmount *m, const char *name) } EXPORT_SYMBOL(mount_subtree); -int ksys_mount(char __user *dev_name, char __user *dir_name, char __user *type, - unsigned long flags, void __user *data) +int ksys_mount(const char __user *dev_name, const char __user *dir_name, + const char __user *type, unsigned long flags, void __user *data) { int ret; char *kernel_type; @@ -3687,13 +3690,8 @@ static void __init init_mount_tree(void) struct mount *m; struct mnt_namespace *ns; struct path root; - struct file_system_type *type; - type = get_fs_type("rootfs"); - if (!type) - panic("Can't find rootfs type"); - mnt = vfs_kern_mount(type, 0, "rootfs", NULL); - put_filesystem(type); + mnt = vfs_kern_mount(&rootfs_fs_type, 0, "rootfs", NULL); if (IS_ERR(mnt)) panic("Can't create rootfs"); @@ -3746,6 +3744,7 @@ void __init mnt_init(void) fs_kobj = kobject_create_and_add("fs", NULL); if (!fs_kobj) printk(KERN_WARNING "%s: kobj create error\n", __func__); + shmem_init(); init_rootfs(); init_mount_tree(); } |