#include <linux/smp.h>
#include <linux/pagemap.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/bitops.h>
#include <linux/capability.h>
#include <linux/rcupdate.h>
/* forward declaration */
static const struct dentry_operations pfmfs_dentry_operations;
-static struct dentry *
-pfmfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data)
+static int pfmfs_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type, "pfm:", NULL, &pfmfs_dentry_operations,
- PFMFS_MAGIC);
+ struct pseudo_fs_context *ctx = init_pseudo(fc, PFMFS_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->dops = &pfmfs_dentry_operations;
+ return 0;
}
static struct file_system_type pfm_fs_type = {
- .name = "pfmfs",
- .mount = pfmfs_mount,
- .kill_sb = kill_anon_super,
+ .name = "pfmfs",
+ .init_fs_context = pfmfs_init_fs_context,
+ .kill_sb = kill_anon_super,
};
MODULE_ALIAS_FS("pfmfs");
ctx->kfc.magic = RDTGROUP_SUPER_MAGIC;
fc->fs_private = &ctx->kfc;
fc->ops = &rdt_fs_context_ops;
- if (fc->user_ns)
- put_user_ns(fc->user_ns);
+ put_user_ns(fc->user_ns);
fc->user_ns = get_user_ns(&init_user_ns);
fc->global = true;
return 0;
if (!thread)
return 0;
- err = ksys_mount("devtmpfs", (char *)mntdir, "devtmpfs", MS_SILENT,
- NULL);
+ err = ksys_mount("devtmpfs", mntdir, "devtmpfs", MS_SILENT, NULL);
if (err)
printk(KERN_INFO "devtmpfs: error mounting %i\n", err);
else
#include <linux/pagemap.h>
#include <linux/module.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/magic.h>
#include <linux/genhd.h>
#include <linux/pfn_t.h>
.drop_inode = generic_delete_inode,
};
-static struct dentry *dax_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int dax_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type, "dax:", &dax_sops, NULL, DAXFS_MAGIC);
+ struct pseudo_fs_context *ctx = init_pseudo(fc, DAXFS_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->ops = &dax_sops;
+ return 0;
}
static struct file_system_type dax_fs_type = {
- .name = "dax",
- .mount = dax_mount,
- .kill_sb = kill_anon_super,
+ .name = "dax",
+ .init_fs_context = dax_init_fs_context,
+ .kill_sb = kill_anon_super,
};
static int dax_test(struct inode *inode, void *data)
if (!dax_cache)
return -ENOMEM;
- rc = register_filesystem(&dax_fs_type);
- if (rc)
- goto err_register_fs;
-
dax_mnt = kern_mount(&dax_fs_type);
if (IS_ERR(dax_mnt)) {
rc = PTR_ERR(dax_mnt);
return 0;
err_mount:
- unregister_filesystem(&dax_fs_type);
- err_register_fs:
kmem_cache_destroy(dax_cache);
return rc;
static void dax_fs_exit(void)
{
kern_unmount(dax_mnt);
- unregister_filesystem(&dax_fs_type);
kmem_cache_destroy(dax_cache);
}
#include <linux/reservation.h>
#include <linux/mm.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <uapi/linux/dma-buf.h>
#include <uapi/linux/magic.h>
static struct vfsmount *dma_buf_mnt;
-static struct dentry *dma_buf_fs_mount(struct file_system_type *fs_type,
- int flags, const char *name, void *data)
+static int dma_buf_fs_init_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type, "dmabuf:", NULL, &dma_buf_dentry_ops,
- DMA_BUF_MAGIC);
+ struct pseudo_fs_context *ctx;
+
+ ctx = init_pseudo(fc, DMA_BUF_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->dops = &dma_buf_dentry_ops;
+ return 0;
}
static struct file_system_type dma_buf_fs_type = {
.name = "dmabuf",
- .mount = dma_buf_fs_mount,
+ .init_fs_context = dma_buf_fs_init_context,
.kill_sb = kill_anon_super,
};
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/slab.h>
#include <linux/srcu.h>
static int drm_fs_cnt;
static struct vfsmount *drm_fs_mnt;
-static const struct dentry_operations drm_fs_dops = {
- .d_dname = simple_dname,
-};
-
-static const struct super_operations drm_fs_sops = {
- .statfs = simple_statfs,
-};
-
-static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+static int drm_fs_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type,
- "drm:",
- &drm_fs_sops,
- &drm_fs_dops,
- 0x010203ff);
+ return init_pseudo(fc, 0x010203ff) ? 0 : -ENOMEM;
}
static struct file_system_type drm_fs_type = {
.name = "drm",
.owner = THIS_MODULE,
- .mount = drm_fs_mount,
+ .init_fs_context = drm_fs_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/module.h>
#include <linux/fs.h>
+#include <linux/fs_context.h>
#include <linux/mount.h>
#include <linux/pagemap.h>
#include <linux/init.h>
* after device init. The direct add_cntr_files() call handles adding
* them from the init code, when the fs is already mounted.
*/
-static int qibfs_fill_super(struct super_block *sb, void *data, int silent)
+static int qibfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct qib_devdata *dd;
unsigned long index;
return ret;
}
-static struct dentry *qibfs_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+static int qibfs_get_tree(struct fs_context *fc)
{
- struct dentry *ret;
-
- ret = mount_single(fs_type, flags, data, qibfs_fill_super);
- if (!IS_ERR(ret))
- qib_super = ret->d_sb;
+ int ret = get_tree_single(fc, qibfs_fill_super);
+ if (ret == 0)
+ qib_super = fc->root->d_sb;
return ret;
}
+static const struct fs_context_operations qibfs_context_ops = {
+ .get_tree = qibfs_get_tree,
+};
+
+static int qibfs_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &qibfs_context_ops;
+ return 0;
+}
+
static void qibfs_kill_super(struct super_block *s)
{
kill_litter_super(s);
static struct file_system_type qibfs_fs_type = {
.owner = THIS_MODULE,
.name = "ipathfs",
- .mount = qibfs_mount,
+ .init_fs_context = qibfs_init_fs_context,
.kill_sb = qibfs_kill_super,
};
MODULE_ALIAS_FS("ipathfs");
#include <misc/cxl.h>
#include <linux/module.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/sched/mm.h>
#include <linux/mmu_context.h>
static int cxl_fs_cnt;
static struct vfsmount *cxl_vfs_mount;
-static const struct dentry_operations cxl_fs_dops = {
- .d_dname = simple_dname,
-};
-
-static struct dentry *cxl_fs_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+static int cxl_fs_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type, "cxl:", NULL, &cxl_fs_dops,
- CXL_PSEUDO_FS_MAGIC);
+ return init_pseudo(fc, CXL_PSEUDO_FS_MAGIC) ? 0 : -ENOMEM;
}
static struct file_system_type cxl_fs_type = {
.name = "cxl",
.owner = THIS_MODULE,
- .mount = cxl_fs_mount,
+ .init_fs_context = cxl_fs_init_fs_context,
.kill_sb = kill_anon_super,
};
*/
#include <linux/fs.h>
+#include <linux/fs_context.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode);
static void ibmasmfs_create_files (struct super_block *sb);
-static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent);
+static int ibmasmfs_fill_super(struct super_block *sb, struct fs_context *fc);
+static int ibmasmfs_get_tree(struct fs_context *fc)
+{
+ return get_tree_single(fc, ibmasmfs_fill_super);
+}
-static struct dentry *ibmasmfs_mount(struct file_system_type *fst,
- int flags, const char *name, void *data)
+static const struct fs_context_operations ibmasmfs_context_ops = {
+ .get_tree = ibmasmfs_get_tree,
+};
+
+static int ibmasmfs_init_fs_context(struct fs_context *fc)
{
- return mount_single(fst, flags, data, ibmasmfs_fill_super);
+ fc->ops = &ibmasmfs_context_ops;
+ return 0;
}
static const struct super_operations ibmasmfs_s_ops = {
static struct file_system_type ibmasmfs_type = {
.owner = THIS_MODULE,
.name = "ibmasmfs",
- .mount = ibmasmfs_mount,
+ .init_fs_context = ibmasmfs_init_fs_context,
.kill_sb = kill_litter_super,
};
MODULE_ALIAS_FS("ibmasmfs");
-static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent)
+static int ibmasmfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct inode *root;
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/balloon_compaction.h>
#include <linux/vmw_vmci_defs.h>
#include <linux/vmw_vmci_api.h>
#ifdef CONFIG_BALLOON_COMPACTION
-static struct dentry *vmballoon_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int vmballoon_init_fs_context(struct fs_context *fc)
{
- static const struct dentry_operations ops = {
- .d_dname = simple_dname,
- };
-
- return mount_pseudo(fs_type, "balloon-vmware:", NULL, &ops,
- BALLOON_VMW_MAGIC);
+ return init_pseudo(fc, BALLOON_VMW_MAGIC) ? 0 : -ENOMEM;
}
static struct file_system_type vmballoon_fs = {
- .name = "balloon-vmware",
- .mount = vmballoon_mount,
- .kill_sb = kill_anon_super,
+ .name = "balloon-vmware",
+ .init_fs_context = vmballoon_init_fs_context,
+ .kill_sb = kill_anon_super,
};
static struct vfsmount *vmballoon_mnt;
#include <linux/module.h>
#include <linux/oprofile.h>
#include <linux/fs.h>
+#include <linux/fs_context.h>
#include <linux/pagemap.h>
#include <linux/uaccess.h>
}
-static int oprofilefs_fill_super(struct super_block *sb, void *data, int silent)
+static int oprofilefs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct inode *root_inode;
return 0;
}
-
-static struct dentry *oprofilefs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int oprofilefs_get_tree(struct fs_context *fc)
{
- return mount_single(fs_type, flags, data, oprofilefs_fill_super);
+ return get_tree_single(fc, oprofilefs_fill_super);
}
+static const struct fs_context_operations oprofilefs_context_ops = {
+ .get_tree = oprofilefs_get_tree,
+};
+
+static int oprofilefs_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &oprofilefs_context_ops;
+ return 0;
+}
static struct file_system_type oprofilefs_type = {
.owner = THIS_MODULE,
.name = "oprofilefs",
- .mount = oprofilefs_mount,
+ .init_fs_context = oprofilefs_init_fs_context,
.kill_sb = kill_litter_super,
};
MODULE_ALIAS_FS("oprofilefs");
#include <linux/idr.h>
#include <linux/module.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/poll.h>
#include <linux/sched/signal.h>
static int ocxlflash_fs_cnt;
static struct vfsmount *ocxlflash_vfs_mount;
-static const struct dentry_operations ocxlflash_fs_dops = {
- .d_dname = simple_dname,
-};
-
-/*
- * ocxlflash_fs_mount() - mount the pseudo-filesystem
- * @fs_type: File system type.
- * @flags: Flags for the filesystem.
- * @dev_name: Device name associated with the filesystem.
- * @data: Data pointer.
- *
- * Return: pointer to the directory entry structure
- */
-static struct dentry *ocxlflash_fs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int ocxlflash_fs_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type, "ocxlflash:", NULL, &ocxlflash_fs_dops,
- OCXLFLASH_FS_MAGIC);
+ return init_pseudo(fc, OCXLFLASH_FS_MAGIC) ? 0 : -ENOMEM;
}
static struct file_system_type ocxlflash_fs_type = {
.name = "ocxlflash",
.owner = THIS_MODULE,
- .mount = ocxlflash_fs_mount,
+ .init_fs_context = ocxlflash_fs_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>
+#include <linux/fs_context.h>
#include <linux/pagemap.h>
#include <linux/uts.h>
#include <linux/wait.h>
};
static int
-gadgetfs_fill_super (struct super_block *sb, void *opts, int silent)
+gadgetfs_fill_super (struct super_block *sb, struct fs_context *fc)
{
struct inode *inode;
struct dev_data *dev;
}
/* "mount -t gadgetfs path /dev/gadget" ends up here */
-static struct dentry *
-gadgetfs_mount (struct file_system_type *t, int flags,
- const char *path, void *opts)
+static int gadgetfs_get_tree(struct fs_context *fc)
{
- return mount_single (t, flags, opts, gadgetfs_fill_super);
+ return get_tree_single(fc, gadgetfs_fill_super);
+}
+
+static const struct fs_context_operations gadgetfs_context_ops = {
+ .get_tree = gadgetfs_get_tree,
+};
+
+static int gadgetfs_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &gadgetfs_context_ops;
+ return 0;
}
static void
static struct file_system_type gadgetfs_type = {
.owner = THIS_MODULE,
.name = shortname,
- .mount = gadgetfs_mount,
+ .init_fs_context = gadgetfs_init_fs_context,
.kill_sb = gadgetfs_kill_sb,
};
MODULE_ALIAS_FS("gadgetfs");
#include <linux/mm.h>
#include <linux/mount.h>
#include <linux/magic.h>
+#include <linux/pseudo_fs.h>
/*
* Balloon device works in 4K page units. So each page is pointed to by
return MIGRATEPAGE_SUCCESS;
}
-static struct dentry *balloon_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int balloon_init_fs_context(struct fs_context *fc)
{
- static const struct dentry_operations ops = {
- .d_dname = simple_dname,
- };
-
- return mount_pseudo(fs_type, "balloon-kvm:", NULL, &ops,
- BALLOON_KVM_MAGIC);
+ return init_pseudo(fc, BALLOON_KVM_MAGIC) ? 0 : -ENOMEM;
}
static struct file_system_type balloon_fs = {
.name = "balloon-kvm",
- .mount = balloon_mount,
+ .init_fs_context = balloon_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/fs.h>
+#include <linux/fs_context.h>
#include <linux/magic.h>
#include <xen/xen.h>
.llseek = default_llseek,
};
-static int xenfs_fill_super(struct super_block *sb, void *data, int silent)
+static int xenfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
static const struct tree_descr xenfs_files[] = {
[2] = { "xenbus", &xen_xenbus_fops, S_IRUSR|S_IWUSR },
xen_initial_domain() ? xenfs_init_files : xenfs_files);
}
-static struct dentry *xenfs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int xenfs_get_tree(struct fs_context *fc)
{
- return mount_single(fs_type, flags, data, xenfs_fill_super);
+ return get_tree_single(fc, xenfs_fill_super);
+}
+
+static const struct fs_context_operations xenfs_context_ops = {
+ .get_tree = xenfs_get_tree,
+};
+
+static int xenfs_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &xenfs_context_ops;
+ return 0;
}
static struct file_system_type xenfs_type = {
.owner = THIS_MODULE,
.name = "xenfs",
- .mount = xenfs_mount,
+ .init_fs_context = xenfs_init_fs_context,
.kill_sb = kill_litter_super,
};
MODULE_ALIAS_FS("xenfs");
#include <linux/ramfs.h>
#include <linux/percpu-refcount.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <asm/kmap_types.h>
#include <linux/uaccess.h>
return file;
}
-static struct dentry *aio_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int aio_init_fs_context(struct fs_context *fc)
{
- struct dentry *root = mount_pseudo(fs_type, "aio:", NULL, NULL,
- AIO_RING_MAGIC);
-
- if (!IS_ERR(root))
- root->d_sb->s_iflags |= SB_I_NOEXEC;
- return root;
+ if (!init_pseudo(fc, AIO_RING_MAGIC))
+ return -ENOMEM;
+ fc->s_iflags |= SB_I_NOEXEC;
+ return 0;
}
/* aio_setup
{
static struct file_system_type aio_fs = {
.name = "aio",
- .mount = aio_mount,
+ .init_fs_context = aio_init_fs_context,
.kill_sb = kill_anon_super,
};
aio_mnt = kern_mount(&aio_fs);
#include <linux/kernel.h>
#include <linux/magic.h>
#include <linux/anon_inodes.h>
+#include <linux/pseudo_fs.h>
#include <linux/uaccess.h>
.d_dname = anon_inodefs_dname,
};
-static struct dentry *anon_inodefs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int anon_inodefs_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type, "anon_inode:", NULL,
- &anon_inodefs_dentry_operations, ANON_INODE_FS_MAGIC);
+ struct pseudo_fs_context *ctx = init_pseudo(fc, ANON_INODE_FS_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->dops = &anon_inodefs_dentry_operations;
+ return 0;
}
static struct file_system_type anon_inode_fs_type = {
.name = "anon_inodefs",
- .mount = anon_inodefs_mount,
+ .init_fs_context = anon_inodefs_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/pagemap.h>
#include <linux/namei.h>
#include <linux/mount.h>
+#include <linux/fs_context.h>
#include <linux/syscalls.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
.evict_inode = bm_evict_inode,
};
-static int bm_fill_super(struct super_block *sb, void *data, int silent)
+static int bm_fill_super(struct super_block *sb, struct fs_context *fc)
{
int err;
static const struct tree_descr bm_files[] = {
return err;
}
-static struct dentry *bm_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int bm_get_tree(struct fs_context *fc)
{
- return mount_single(fs_type, flags, data, bm_fill_super);
+ return get_tree_single(fc, bm_fill_super);
+}
+
+static const struct fs_context_operations bm_context_ops = {
+ .get_tree = bm_get_tree,
+};
+
+static int bm_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &bm_context_ops;
+ return 0;
}
static struct linux_binfmt misc_format = {
static struct file_system_type bm_fs_type = {
.owner = THIS_MODULE,
.name = "binfmt_misc",
- .mount = bm_mount,
+ .init_fs_context = bm_init_fs_context,
.kill_sb = kill_litter_super,
};
MODULE_ALIAS_FS("binfmt_misc");
#include <linux/writeback.h>
#include <linux/mpage.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/uio.h>
#include <linux/namei.h>
#include <linux/log2.h>
.evict_inode = bdev_evict_inode,
};
-static struct dentry *bd_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int bd_init_fs_context(struct fs_context *fc)
{
- struct dentry *dent;
- dent = mount_pseudo(fs_type, "bdev:", &bdev_sops, NULL, BDEVFS_MAGIC);
- if (!IS_ERR(dent))
- dent->d_sb->s_iflags |= SB_I_CGROUPWB;
- return dent;
+ struct pseudo_fs_context *ctx = init_pseudo(fc, BDEVFS_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+ fc->s_iflags |= SB_I_CGROUPWB;
+ ctx->ops = &bdev_sops;
+ return 0;
}
static struct file_system_type bd_type = {
.name = "bdev",
- .mount = bd_mount,
+ .init_fs_context = bd_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/fs.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/magic.h>
#include "btrfs-tests.h"
#include "../ctree.h"
.destroy_inode = btrfs_test_destroy_inode,
};
-static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+
+static int btrfs_test_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
- NULL, BTRFS_TEST_MAGIC);
+ struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->ops = &btrfs_test_super_ops;
+ return 0;
}
static struct file_system_type test_type = {
.name = "btrfs_test_fs",
- .mount = btrfs_test_mount,
+ .init_fs_context = btrfs_test_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/mount.h>
+#include <linux/fs_context.h>
#include <linux/pagemap.h>
#include <linux/init.h>
#include <linux/slab.h>
.s_iattr = NULL,
};
-static int configfs_fill_super(struct super_block *sb, void *data, int silent)
+static int configfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct inode *inode;
struct dentry *root;
return 0;
}
-static struct dentry *configfs_do_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int configfs_get_tree(struct fs_context *fc)
{
- return mount_single(fs_type, flags, data, configfs_fill_super);
+ return get_tree_single(fc, configfs_fill_super);
+}
+
+static const struct fs_context_operations configfs_context_ops = {
+ .get_tree = configfs_get_tree,
+};
+
+static int configfs_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &configfs_context_ops;
+ return 0;
}
static struct file_system_type configfs_fs_type = {
.owner = THIS_MODULE,
.name = "configfs",
- .mount = configfs_do_mount,
+ .init_fs_context = configfs_init_fs_context,
.kill_sb = kill_litter_super,
};
MODULE_ALIAS_FS("configfs");
end = ERR_PTR(-ENAMETOOLONG);
return end;
}
-EXPORT_SYMBOL(simple_dname);
/*
* Write full pathname from the root of the filesystem into the buffer.
#include <linux/ctype.h>
#include <linux/efi.h>
#include <linux/fs.h>
+#include <linux/fs_context.h>
#include <linux/module.h>
#include <linux/pagemap.h>
#include <linux/ucs2_string.h>
.evict_inode = efivarfs_evict_inode,
};
-static struct super_block *efivarfs_sb;
-
/*
* Compare two efivarfs file names.
*
return 0;
}
-static int efivarfs_fill_super(struct super_block *sb, void *data, int silent)
+static int efivarfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct inode *inode = NULL;
struct dentry *root;
int err;
- efivarfs_sb = sb;
-
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_SIZE;
sb->s_blocksize_bits = PAGE_SHIFT;
return err;
}
-static struct dentry *efivarfs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int efivarfs_get_tree(struct fs_context *fc)
+{
+ return get_tree_single(fc, efivarfs_fill_super);
+}
+
+static const struct fs_context_operations efivarfs_context_ops = {
+ .get_tree = efivarfs_get_tree,
+};
+
+static int efivarfs_init_fs_context(struct fs_context *fc)
{
- return mount_single(fs_type, flags, data, efivarfs_fill_super);
+ fc->ops = &efivarfs_context_ops;
+ return 0;
}
static void efivarfs_kill_sb(struct super_block *sb)
{
kill_litter_super(sb);
- efivarfs_sb = NULL;
/* Remove all entries and destroy */
__efivar_entry_iter(efivarfs_destroy, &efivarfs_list, NULL, NULL);
static struct file_system_type efivarfs_type = {
.owner = THIS_MODULE,
.name = "efivarfs",
- .mount = efivarfs_mount,
+ .init_fs_context = efivarfs_init_fs_context,
.kill_sb = efivarfs_kill_sb,
};
return invalf(fc, "%s: not usable as path", param->key);
}
+ f->refcnt++; /* filename_lookup() drops our ref. */
ret = filename_lookup(param->dirfd, f, flags, _path, NULL);
if (ret < 0) {
errorf(fc, "%s: Lookup failure for '%s'", param->key, f->name);
case FSCONFIG_CMD_CREATE:
if (fc->phase != FS_CONTEXT_CREATE_PARAMS)
return -EBUSY;
+ if (!mount_capable(fc))
+ return -EPERM;
fc->phase = FS_CONTEXT_CREATING;
ret = vfs_get_tree(fc);
if (ret)
static int fuse_ctl_get_tree(struct fs_context *fc)
{
- return vfs_get_super(fc, vfs_get_single_super, fuse_ctl_fill_super);
+ return get_tree_single(fc, fuse_ctl_fill_super);
}
static const struct fs_context_operations fuse_ctl_context_ops = {
int err = hugetlbfs_validate(fc);
if (err)
return err;
- return vfs_get_super(fc, vfs_get_independent_super, hugetlbfs_fill_super);
+ return get_tree_nodev(fc, hugetlbfs_fill_super);
}
static void hugetlbfs_fs_context_free(struct fs_context *fc)
struct mount;
struct shrink_control;
struct fs_context;
+struct user_namespace;
/*
* block_dev.c
extern int reconfigure_super(struct fs_context *);
extern bool trylock_super(struct super_block *sb);
extern struct super_block *user_get_super(dev_t);
+extern bool mount_capable(struct fs_context *);
/*
* open.c
extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
extern struct dentry *d_alloc_cursor(struct dentry *);
extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
+extern char *simple_dname(struct dentry *, char *, int);
/*
* read_write.c
#include <linux/exportfs.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h> /* sync_mapping_buffers */
+#include <linux/fs_context.h>
+#include <linux/pseudo_fs.h>
#include <linux/uaccess.h>
.statfs = simple_statfs,
};
-/*
- * Common helper for pseudo-filesystems (sockfs, pipefs, bdev - stuff that
- * will never be mountable)
- */
-struct dentry *mount_pseudo_xattr(struct file_system_type *fs_type, char *name,
- const struct super_operations *ops, const struct xattr_handler **xattr,
- const struct dentry_operations *dops, unsigned long magic)
+static int pseudo_fs_fill_super(struct super_block *s, struct fs_context *fc)
{
- struct super_block *s;
- struct dentry *dentry;
+ struct pseudo_fs_context *ctx = fc->fs_private;
struct inode *root;
- struct qstr d_name = QSTR_INIT(name, strlen(name));
-
- s = sget_userns(fs_type, NULL, set_anon_super, SB_KERNMOUNT|SB_NOUSER,
- &init_user_ns, NULL);
- if (IS_ERR(s))
- return ERR_CAST(s);
s->s_maxbytes = MAX_LFS_FILESIZE;
s->s_blocksize = PAGE_SIZE;
s->s_blocksize_bits = PAGE_SHIFT;
- s->s_magic = magic;
- s->s_op = ops ? ops : &simple_super_operations;
- s->s_xattr = xattr;
+ s->s_magic = ctx->magic;
+ s->s_op = ctx->ops ?: &simple_super_operations;
+ s->s_xattr = ctx->xattr;
s->s_time_gran = 1;
root = new_inode(s);
if (!root)
- goto Enomem;
+ return -ENOMEM;
+
/*
* since this is the first inode, make it number 1. New inodes created
* after this must take care not to collide with it (by passing
root->i_ino = 1;
root->i_mode = S_IFDIR | S_IRUSR | S_IWUSR;
root->i_atime = root->i_mtime = root->i_ctime = current_time(root);
- dentry = __d_alloc(s, &d_name);
- if (!dentry) {
- iput(root);
- goto Enomem;
+ s->s_root = d_make_root(root);
+ if (!s->s_root)
+ return -ENOMEM;
+ s->s_d_op = ctx->dops;
+ return 0;
+}
+
+static int pseudo_fs_get_tree(struct fs_context *fc)
+{
+ return get_tree_nodev(fc, pseudo_fs_fill_super);
+}
+
+static void pseudo_fs_free(struct fs_context *fc)
+{
+ kfree(fc->fs_private);
+}
+
+static const struct fs_context_operations pseudo_fs_context_ops = {
+ .free = pseudo_fs_free,
+ .get_tree = pseudo_fs_get_tree,
+};
+
+/*
+ * Common helper for pseudo-filesystems (sockfs, pipefs, bdev - stuff that
+ * will never be mountable)
+ */
+struct pseudo_fs_context *init_pseudo(struct fs_context *fc,
+ unsigned long magic)
+{
+ struct pseudo_fs_context *ctx;
+
+ ctx = kzalloc(sizeof(struct pseudo_fs_context), GFP_KERNEL);
+ if (likely(ctx)) {
+ ctx->magic = magic;
+ fc->fs_private = ctx;
+ fc->ops = &pseudo_fs_context_ops;
+ fc->sb_flags |= SB_NOUSER;
+ fc->global = true;
}
- d_instantiate(dentry, root);
- s->s_root = dentry;
- s->s_d_op = dops;
- s->s_flags |= SB_ACTIVE;
- return dget(s->s_root);
-
-Enomem:
- deactivate_locked_super(s);
- return ERR_PTR(-ENOMEM);
+ return ctx;
}
-EXPORT_SYMBOL(mount_pseudo_xattr);
+EXPORT_SYMBOL(init_pseudo);
int simple_open(struct inode *inode, struct file *file)
{
#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"
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)
}
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;
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");
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();
}
#include <linux/slab.h>
#include <linux/namei.h>
#include <linux/ctype.h>
+#include <linux/fs_context.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/lockd/lockd.h>
inode_unlock(dir);
}
-static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
+static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
nfsd_net_id);
#endif
/* last one */ {""}
};
- get_net(sb->s_fs_info);
+
ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
if (ret)
return ret;
return PTR_ERR(dentry);
nn->nfsd_client_dir = dentry;
return 0;
+}
+static int nfsd_fs_get_tree(struct fs_context *fc)
+{
+ fc->s_fs_info = get_net(fc->net_ns);
+ return vfs_get_super(fc, vfs_get_keyed_super, nfsd_fill_super);
}
-static struct dentry *nfsd_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static void nfsd_fs_free_fc(struct fs_context *fc)
{
- struct net *net = current->nsproxy->net_ns;
- return mount_ns(fs_type, flags, data, net, net->user_ns, nfsd_fill_super);
+ if (fc->s_fs_info)
+ put_net(fc->s_fs_info);
+}
+
+static const struct fs_context_operations nfsd_fs_context_ops = {
+ .free = nfsd_fs_free_fc,
+ .get_tree = nfsd_fs_get_tree,
+};
+
+static int nfsd_init_fs_context(struct fs_context *fc)
+{
+ put_user_ns(fc->user_ns);
+ fc->user_ns = get_user_ns(fc->net_ns->user_ns);
+ fc->ops = &nfsd_fs_context_ops;
+ return 0;
}
static void nfsd_umount(struct super_block *sb)
static struct file_system_type nfsd_fs_type = {
.owner = THIS_MODULE,
.name = "nfsd",
- .mount = nfsd_mount,
+ .init_fs_context = nfsd_init_fs_context,
.kill_sb = nfsd_umount,
};
MODULE_ALIAS_FS("nfsd");
// SPDX-License-Identifier: GPL-2.0
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/proc_ns.h>
.evict_inode = nsfs_evict,
.show_path = nsfs_show_path,
};
-static struct dentry *nsfs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+
+static int nsfs_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type, "nsfs:", &nsfs_ops,
- &ns_dentry_operations, NSFS_MAGIC);
+ struct pseudo_fs_context *ctx = init_pseudo(fc, NSFS_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->ops = &nsfs_ops;
+ ctx->dops = &ns_dentry_operations;
+ return 0;
}
+
static struct file_system_type nsfs = {
.name = "nsfs",
- .mount = nsfs_mount,
+ .init_fs_context = nsfs_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/types.h>
#include <linux/string.h>
#include <linux/fs.h>
+#include <linux/fs_context.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/seq_file.h>
.remount_fs = openprom_remount,
};
-static int openprom_fill_super(struct super_block *s, void *data, int silent)
+static int openprom_fill_super(struct super_block *s, struct fs_context *fc)
{
struct inode *root_inode;
struct op_inode_info *oi;
return ret;
}
-static struct dentry *openprom_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int openpromfs_get_tree(struct fs_context *fc)
{
- return mount_single(fs_type, flags, data, openprom_fill_super);
+ return get_tree_single(fc, openprom_fill_super);
+}
+
+static const struct fs_context_operations openpromfs_context_ops = {
+ .get_tree = openpromfs_get_tree,
+};
+
+static int openpromfs_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &openpromfs_context_ops;
+ return 0;
}
static struct file_system_type openprom_fs_type = {
.owner = THIS_MODULE,
.name = "openpromfs",
- .mount = openprom_mount,
+ .init_fs_context = openpromfs_init_fs_context,
.kill_sb = kill_anon_super,
};
MODULE_ALIAS_FS("openpromfs");
#include <linux/fs.h>
#include <linux/log2.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/magic.h>
#include <linux/pipe_fs_i.h>
#include <linux/uio.h>
* any operations on the root directory. However, we need a non-trivial
* d_name - pipe: will go nicely and kill the special-casing in procfs.
*/
-static struct dentry *pipefs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+
+static int pipefs_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type, "pipe:", &pipefs_ops,
- &pipefs_dentry_operations, PIPEFS_MAGIC);
+ struct pseudo_fs_context *ctx = init_pseudo(fc, PIPEFS_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->ops = &pipefs_ops;
+ ctx->dops = &pipefs_dentry_operations;
+ return 0;
}
static struct file_system_type pipe_fs_type = {
.name = "pipefs",
- .mount = pipefs_mount,
+ .init_fs_context = pipefs_init_fs_context,
.kill_sb = kill_anon_super,
};
{
struct proc_fs_context *ctx = fc->fs_private;
- put_user_ns(fc->user_ns);
- fc->user_ns = get_user_ns(ctx->pid_ns->user_ns);
fc->s_fs_info = ctx->pid_ns;
return vfs_get_super(fc, vfs_get_keyed_super, proc_fill_super);
}
{
struct proc_fs_context *ctx = fc->fs_private;
- if (ctx->pid_ns)
- put_pid_ns(ctx->pid_ns);
+ put_pid_ns(ctx->pid_ns);
kfree(ctx);
}
return -ENOMEM;
ctx->pid_ns = get_pid_ns(task_active_pid_ns(current));
+ put_user_ns(fc->user_ns);
+ fc->user_ns = get_user_ns(ctx->pid_ns->user_ns);
fc->fs_private = ctx;
fc->ops = &proc_fs_context_ops;
return 0;
.fs_flags = FS_USERNS_MOUNT,
};
-int __init init_ramfs_fs(void)
+static int __init init_ramfs_fs(void)
{
- static unsigned long once;
-
- if (test_and_set_bit(0, &once))
- return 0;
return register_filesystem(&ramfs_fs_type);
}
fs_initcall(init_ramfs_fs);
EXPORT_SYMBOL(generic_shutdown_super);
+bool mount_capable(struct fs_context *fc)
+{
+ struct user_namespace *user_ns = fc->global ? &init_user_ns
+ : fc->user_ns;
+
+ if (!(fc->fs_type->fs_flags & FS_USERNS_MOUNT))
+ return capable(CAP_SYS_ADMIN);
+ else
+ return ns_capable(user_ns, CAP_SYS_ADMIN);
+}
+
/**
* sget_fc - Find or create a superblock
* @fc: Filesystem context.
struct user_namespace *user_ns = fc->global ? &init_user_ns : fc->user_ns;
int err;
- if (!(fc->sb_flags & SB_KERNMOUNT) &&
- fc->purpose != FS_CONTEXT_FOR_SUBMOUNT) {
- /* Don't allow mounting unless the caller has CAP_SYS_ADMIN
- * over the namespace.
- */
- if (!(fc->fs_type->fs_flags & FS_USERNS_MOUNT)) {
- if (!capable(CAP_SYS_ADMIN))
- return ERR_PTR(-EPERM);
- } else {
- if (!ns_capable(fc->user_ns, CAP_SYS_ADMIN))
- return ERR_PTR(-EPERM);
- }
- }
-
retry:
spin_lock(&sb_lock);
if (test) {
}
fc->s_fs_info = NULL;
s->s_type = fc->fs_type;
+ s->s_iflags |= fc->s_iflags;
strlcpy(s->s_id, s->s_type->name, sizeof(s->s_id));
list_add_tail(&s->s_list, &super_blocks);
hlist_add_head(&s->s_instances, &s->s_type->fs_supers);
EXPORT_SYMBOL(sget_fc);
/**
- * sget_userns - find or create a superblock
- * @type: filesystem type superblock should belong to
- * @test: comparison callback
- * @set: setup callback
- * @flags: mount flags
- * @user_ns: User namespace for the super_block
- * @data: argument to each of them
+ * sget - find or create a superblock
+ * @type: filesystem type superblock should belong to
+ * @test: comparison callback
+ * @set: setup callback
+ * @flags: mount flags
+ * @data: argument to each of them
*/
-struct super_block *sget_userns(struct file_system_type *type,
+struct super_block *sget(struct file_system_type *type,
int (*test)(struct super_block *,void *),
int (*set)(struct super_block *,void *),
- int flags, struct user_namespace *user_ns,
+ int flags,
void *data)
{
+ struct user_namespace *user_ns = current_user_ns();
struct super_block *s = NULL;
struct super_block *old;
int err;
- if (!(flags & (SB_KERNMOUNT|SB_SUBMOUNT)) &&
- !(type->fs_flags & FS_USERNS_MOUNT) &&
- !capable(CAP_SYS_ADMIN))
- return ERR_PTR(-EPERM);
+ /* We don't yet pass the user namespace of the parent
+ * mount through to here so always use &init_user_ns
+ * until that changes.
+ */
+ if (flags & SB_SUBMOUNT)
+ user_ns = &init_user_ns;
+
retry:
spin_lock(&sb_lock);
if (test) {
register_shrinker_prepared(&s->s_shrink);
return s;
}
-
-EXPORT_SYMBOL(sget_userns);
-
-/**
- * sget - find or create a superblock
- * @type: filesystem type superblock should belong to
- * @test: comparison callback
- * @set: setup callback
- * @flags: mount flags
- * @data: argument to each of them
- */
-struct super_block *sget(struct file_system_type *type,
- int (*test)(struct super_block *,void *),
- int (*set)(struct super_block *,void *),
- int flags,
- void *data)
-{
- struct user_namespace *user_ns = current_user_ns();
-
- /* We don't yet pass the user namespace of the parent
- * mount through to here so always use &init_user_ns
- * until that changes.
- */
- if (flags & SB_SUBMOUNT)
- user_ns = &init_user_ns;
-
- /* Ensure the requestor has permissions over the target filesystem */
- if (!(flags & (SB_KERNMOUNT|SB_SUBMOUNT)) && !ns_capable(user_ns, CAP_SYS_ADMIN))
- return ERR_PTR(-EPERM);
-
- return sget_userns(type, test, set, flags, user_ns, data);
-}
-
EXPORT_SYMBOL(sget);
void drop_super(struct super_block *sb)
}
EXPORT_SYMBOL(kill_litter_super);
-static int ns_test_super(struct super_block *sb, void *data)
-{
- return sb->s_fs_info == data;
-}
-
-static int ns_set_super(struct super_block *sb, void *data)
-{
- sb->s_fs_info = data;
- return set_anon_super(sb, NULL);
-}
-
-struct dentry *mount_ns(struct file_system_type *fs_type,
- int flags, void *data, void *ns, struct user_namespace *user_ns,
- int (*fill_super)(struct super_block *, void *, int))
-{
- struct super_block *sb;
-
- /* Don't allow mounting unless the caller has CAP_SYS_ADMIN
- * over the namespace.
- */
- if (!(flags & SB_KERNMOUNT) && !ns_capable(user_ns, CAP_SYS_ADMIN))
- return ERR_PTR(-EPERM);
-
- sb = sget_userns(fs_type, ns_test_super, ns_set_super, flags,
- user_ns, ns);
- if (IS_ERR(sb))
- return ERR_CAST(sb);
-
- if (!sb->s_root) {
- int err;
- err = fill_super(sb, data, flags & SB_SILENT ? 1 : 0);
- if (err) {
- deactivate_locked_super(sb);
- return ERR_PTR(err);
- }
-
- sb->s_flags |= SB_ACTIVE;
- }
-
- return dget(sb->s_root);
-}
-
-EXPORT_SYMBOL(mount_ns);
-
int set_anon_super_fc(struct super_block *sb, struct fs_context *fc)
{
return set_anon_super(sb, NULL);
}
EXPORT_SYMBOL(vfs_get_super);
+int get_tree_nodev(struct fs_context *fc,
+ int (*fill_super)(struct super_block *sb,
+ struct fs_context *fc))
+{
+ return vfs_get_super(fc, vfs_get_independent_super, fill_super);
+}
+EXPORT_SYMBOL(get_tree_nodev);
+
+int get_tree_single(struct fs_context *fc,
+ int (*fill_super)(struct super_block *sb,
+ struct fs_context *fc))
+{
+ return vfs_get_super(fc, vfs_get_single_super, fill_super);
+}
+EXPORT_SYMBOL(get_tree_single);
+
#ifdef CONFIG_BLOCK
static int set_bdev_super(struct super_block *s, void *data)
{
fc->fs_private = kfc;
fc->ops = &sysfs_fs_context_ops;
if (netns) {
- if (fc->user_ns)
- put_user_ns(fc->user_ns);
+ put_user_ns(fc->user_ns);
fc->user_ns = get_user_ns(netns->user_ns);
}
fc->global = true;
*/
extern __printf(4, 5)
char *dynamic_dname(struct dentry *, char *, int, const char *, ...);
-extern char *simple_dname(struct dentry *, char *, int);
extern char *__d_path(const struct path *, const struct path *, char *, int);
extern char *d_absolute_path(const struct path *, char *, int);
#define MODULE_ALIAS_FS(NAME) MODULE_ALIAS("fs-" NAME)
-extern struct dentry *mount_ns(struct file_system_type *fs_type,
- int flags, void *data, void *ns, struct user_namespace *user_ns,
- int (*fill_super)(struct super_block *, void *, int));
#ifdef CONFIG_BLOCK
extern struct dentry *mount_bdev(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data,
struct super_block *sget_fc(struct fs_context *fc,
int (*test)(struct super_block *, struct fs_context *),
int (*set)(struct super_block *, struct fs_context *));
-struct super_block *sget_userns(struct file_system_type *type,
- int (*test)(struct super_block *,void *),
- int (*set)(struct super_block *,void *),
- int flags, struct user_namespace *user_ns,
- void *data);
struct super_block *sget(struct file_system_type *type,
int (*test)(struct super_block *,void *),
int (*set)(struct super_block *,void *),
int flags, void *data);
-extern struct dentry *mount_pseudo_xattr(struct file_system_type *, char *,
- const struct super_operations *ops,
- const struct xattr_handler **xattr,
- const struct dentry_operations *dops,
- unsigned long);
-
-static inline struct dentry *
-mount_pseudo(struct file_system_type *fs_type, char *name,
- const struct super_operations *ops,
- const struct dentry_operations *dops, unsigned long magic)
-{
- return mount_pseudo_xattr(fs_type, name, ops, NULL, dops, magic);
-}
/* Alas, no aliases. Too much hassle with bringing module.h everywhere */
#define fops_get(fops) \
void *s_fs_info; /* Proposed s_fs_info */
unsigned int sb_flags; /* Proposed superblock flags (SB_*) */
unsigned int sb_flags_mask; /* Superblock flags that were changed */
+ unsigned int s_iflags; /* OR'd with sb->s_iflags */
unsigned int lsm_flags; /* Information flags from the fs to the LSM */
enum fs_context_purpose purpose:8;
enum fs_context_phase phase:8; /* The phase the context is in */
enum vfs_get_super_keying keying,
int (*fill_super)(struct super_block *sb,
struct fs_context *fc));
+extern int get_tree_nodev(struct fs_context *fc,
+ int (*fill_super)(struct super_block *sb,
+ struct fs_context *fc));
+extern int get_tree_single(struct fs_context *fc,
+ int (*fill_super)(struct super_block *sb,
+ struct fs_context *fc));
extern const struct file_operations fscontext_fops;
/* Used for contructor calls. */
typedef void (*ctor_fn_t)(void);
+struct file_system_type;
+
/* Defined in init/main.c */
extern int do_one_initcall(initcall_t fn);
extern char __initdata boot_command_line[];
/* used by init/main.c */
void setup_arch(char **);
void prepare_namespace(void);
-int __init init_rootfs(void);
+void __init init_rootfs(void);
+extern struct file_system_type rootfs_fs_type;
#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX)
extern bool rodata_enabled;
--- /dev/null
+#ifndef __LINUX_PSEUDO_FS__
+#define __LINUX_PSEUDO_FS__
+
+#include <linux/fs_context.h>
+
+struct pseudo_fs_context {
+ const struct super_operations *ops;
+ const struct xattr_handler **xattr;
+ const struct dentry_operations *dops;
+ unsigned long magic;
+};
+
+struct pseudo_fs_context *init_pseudo(struct fs_context *fc,
+ unsigned long magic);
+
+#endif
extern const struct file_operations ramfs_file_operations;
extern const struct vm_operations_struct generic_file_vm_ops;
-extern int __init init_ramfs_fs(void);
int ramfs_fill_super(struct super_block *sb, void *data, int silent);
* the ksys_xyzyyz() functions prototyped below.
*/
-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 ksys_umount(char __user *name, int flags);
int ksys_dup(unsigned int fildes);
int ksys_chroot(const char __user *filename);
#define BALLOON_KVM_MAGIC 0x13661366
#define ZSMALLOC_MAGIC 0x58295829
#define DMA_BUF_MAGIC 0x444d4142 /* "DMAB" */
+#define Z3FOLD_MAGIC 0x33
#endif /* __LINUX_MAGIC_H__ */
static struct dentry *rootfs_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
- static unsigned long once;
void *fill = ramfs_fill_super;
- if (test_and_set_bit(0, &once))
- return ERR_PTR(-ENODEV);
-
if (IS_ENABLED(CONFIG_TMPFS) && is_tmpfs)
fill = shmem_fill_super;
return mount_nodev(fs_type, flags, data, fill);
}
-static struct file_system_type rootfs_fs_type = {
+struct file_system_type rootfs_fs_type = {
.name = "rootfs",
.mount = rootfs_mount,
.kill_sb = kill_litter_super,
};
-int __init init_rootfs(void)
+void __init init_rootfs(void)
{
- int err = register_filesystem(&rootfs_fs_type);
-
- if (err)
- return err;
-
if (IS_ENABLED(CONFIG_TMPFS) && !saved_root_name[0] &&
- (!root_fs_names || strstr(root_fs_names, "tmpfs"))) {
- err = shmem_init();
+ (!root_fs_names || strstr(root_fs_names, "tmpfs")))
is_tmpfs = true;
- } else {
- err = init_ramfs_fs();
- }
-
- if (err)
- unregister_filesystem(&rootfs_fs_type);
-
- return err;
}
static void __init do_basic_setup(void)
{
cpuset_init_smp();
- shmem_init();
driver_init();
init_irq_proc();
do_ctors();
{
struct mqueue_fs_context *ctx = fc->fs_private;
- put_user_ns(fc->user_ns);
- fc->user_ns = get_user_ns(ctx->ipc_ns->user_ns);
fc->s_fs_info = ctx->ipc_ns;
return vfs_get_super(fc, vfs_get_keyed_super, mqueue_fill_super);
}
{
struct mqueue_fs_context *ctx = fc->fs_private;
- if (ctx->ipc_ns)
- put_ipc_ns(ctx->ipc_ns);
+ put_ipc_ns(ctx->ipc_ns);
kfree(ctx);
}
return -ENOMEM;
ctx->ipc_ns = get_ipc_ns(current->nsproxy->ipc_ns);
+ put_user_ns(fc->user_ns);
+ fc->user_ns = get_user_ns(ctx->ipc_ns->user_ns);
fc->fs_private = ctx;
fc->ops = &mqueue_fs_context_ops;
return 0;
ctx = fc->fs_private;
put_ipc_ns(ctx->ipc_ns);
ctx->ipc_ns = get_ipc_ns(ns);
+ put_user_ns(fc->user_ns);
+ fc->user_ns = get_user_ns(ctx->ipc_ns->user_ns);
mnt = fc_mount(fc);
put_fs_context(fc);
fc->ops = &cgroup_fs_context_ops;
else
fc->ops = &cgroup1_fs_context_ops;
- if (fc->user_ns)
- put_user_ns(fc->user_ns);
+ put_user_ns(fc->user_ns);
fc->user_ns = get_user_ns(ctx->ns->user_ns);
fc->global = true;
return 0;
.fs_flags = FS_USERNS_MOUNT,
};
+#ifdef CONFIG_CPUSETS
+static const struct fs_context_operations cpuset_fs_context_ops = {
+ .get_tree = cgroup1_get_tree,
+ .free = cgroup_fs_context_free,
+};
+
+/*
+ * This is ugly, but preserves the userspace API for existing cpuset
+ * users. If someone tries to mount the "cpuset" filesystem, we
+ * silently switch it to mount "cgroup" instead
+ */
+static int cpuset_init_fs_context(struct fs_context *fc)
+{
+ char *agent = kstrdup("/sbin/cpuset_release_agent", GFP_USER);
+ struct cgroup_fs_context *ctx;
+ int err;
+
+ err = cgroup_init_fs_context(fc);
+ if (err) {
+ kfree(agent);
+ return err;
+ }
+
+ fc->ops = &cpuset_fs_context_ops;
+
+ ctx = cgroup_fc2context(fc);
+ ctx->subsys_mask = 1 << cpuset_cgrp_id;
+ ctx->flags |= CGRP_ROOT_NOPREFIX;
+ ctx->release_agent = agent;
+
+ get_filesystem(&cgroup_fs_type);
+ put_filesystem(fc->fs_type);
+ fc->fs_type = &cgroup_fs_type;
+
+ return 0;
+}
+
+static struct file_system_type cpuset_fs_type = {
+ .name = "cpuset",
+ .init_fs_context = cpuset_init_fs_context,
+ .fs_flags = FS_USERNS_MOUNT,
+};
+#endif
+
int cgroup_path_ns_locked(struct cgroup *cgrp, char *buf, size_t buflen,
struct cgroup_namespace *ns)
{
WARN_ON(register_filesystem(&cgroup_fs_type));
WARN_ON(register_filesystem(&cgroup2_fs_type));
WARN_ON(!proc_create_single("cgroups", 0, NULL, proc_cgroupstats_show));
+#ifdef CONFIG_CPUSETS
+ WARN_ON(register_filesystem(&cpuset_fs_type));
+#endif
return 0;
}
(cpuset_cgrp_subsys.root->flags & CGRP_ROOT_CPUSET_V2_MODE);
}
-/*
- * This is ugly, but preserves the userspace API for existing cpuset
- * users. If someone tries to mount the "cpuset" filesystem, we
- * silently switch it to mount "cgroup" instead
- */
-static int cpuset_get_tree(struct fs_context *fc)
-{
- struct file_system_type *cgroup_fs;
- struct fs_context *new_fc;
- int ret;
-
- cgroup_fs = get_fs_type("cgroup");
- if (!cgroup_fs)
- return -ENODEV;
-
- new_fc = fs_context_for_mount(cgroup_fs, fc->sb_flags);
- if (IS_ERR(new_fc)) {
- ret = PTR_ERR(new_fc);
- } else {
- static const char agent_path[] = "/sbin/cpuset_release_agent";
- ret = vfs_parse_fs_string(new_fc, "cpuset", NULL, 0);
- if (!ret)
- ret = vfs_parse_fs_string(new_fc, "noprefix", NULL, 0);
- if (!ret)
- ret = vfs_parse_fs_string(new_fc, "release_agent",
- agent_path, sizeof(agent_path) - 1);
- if (!ret)
- ret = vfs_get_tree(new_fc);
- if (!ret) { /* steal the result */
- fc->root = new_fc->root;
- new_fc->root = NULL;
- }
- put_fs_context(new_fc);
- }
- put_filesystem(cgroup_fs);
- return ret;
-}
-
-static const struct fs_context_operations cpuset_fs_context_ops = {
- .get_tree = cpuset_get_tree,
-};
-
-static int cpuset_init_fs_context(struct fs_context *fc)
-{
- fc->ops = &cpuset_fs_context_ops;
- return 0;
-}
-
-static struct file_system_type cpuset_fs_type = {
- .name = "cpuset",
- .init_fs_context = cpuset_init_fs_context,
-};
-
/*
* Return in pmask the portion of a cpusets's cpus_allowed that
* are online. If none are online, walk up the cpuset hierarchy
/**
* cpuset_init - initialize cpusets at system boot
*
- * Description: Initialize top_cpuset and the cpuset internal file system,
+ * Description: Initialize top_cpuset
**/
int __init cpuset_init(void)
{
- int err = 0;
-
BUG_ON(!alloc_cpumask_var(&top_cpuset.cpus_allowed, GFP_KERNEL));
BUG_ON(!alloc_cpumask_var(&top_cpuset.effective_cpus, GFP_KERNEL));
BUG_ON(!zalloc_cpumask_var(&top_cpuset.subparts_cpus, GFP_KERNEL));
set_bit(CS_SCHED_LOAD_BALANCE, &top_cpuset.flags);
top_cpuset.relax_domain_level = -1;
- err = register_filesystem(&cpuset_fs_type);
- if (err < 0)
- return err;
-
BUG_ON(!alloc_cpumask_var(&cpus_attach, GFP_KERNEL));
return 0;
{
int error;
- /* If rootfs called this, don't re-init */
- if (shmem_inode_cachep)
- return 0;
-
shmem_init_inodecache();
error = register_filesystem(&shmem_fs_type);
#include <linux/atomic.h>
#include <linux/sched.h>
#include <linux/cpumask.h>
-#include <linux/dcache.h>
#include <linux/list.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/compaction.h>
#include <linux/percpu.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/fs.h>
#include <linux/preempt.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/zpool.h>
+#include <linux/magic.h>
/*
* NCHUNKS_ORDER determines the internal allocation granularity, effectively
}
}
-static struct dentry *z3fold_do_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int z3fold_init_fs_context(struct fs_context *fc)
{
- static const struct dentry_operations ops = {
- .d_dname = simple_dname,
- };
-
- return mount_pseudo(fs_type, "z3fold:", NULL, &ops, 0x33);
+ return init_pseudo(fc, Z3FOLD_MAGIC) ? 0 : -ENOMEM;
}
static struct file_system_type z3fold_fs = {
.name = "z3fold",
- .mount = z3fold_do_mount,
+ .init_fs_context = z3fold_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/zsmalloc.h>
#include <linux/zpool.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/migrate.h>
#include <linux/pagemap.h>
#include <linux/fs.h>
} while ((page = get_next_page(page)) != NULL);
}
-static struct dentry *zs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int zs_init_fs_context(struct fs_context *fc)
{
- static const struct dentry_operations ops = {
- .d_dname = simple_dname,
- };
-
- return mount_pseudo(fs_type, "zsmalloc:", NULL, &ops, ZSMALLOC_MAGIC);
+ return init_pseudo(fc, ZSMALLOC_MAGIC) ? 0 : -ENOMEM;
}
static struct file_system_type zsmalloc_fs = {
.name = "zsmalloc",
- .mount = zs_mount,
+ .init_fs_context = zs_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/module.h>
#include <linux/highmem.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/security.h>
#include <linux/syscalls.h>
#include <linux/compat.h>
NULL
};
-static struct dentry *sockfs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int sockfs_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo_xattr(fs_type, "socket:", &sockfs_ops,
- sockfs_xattr_handlers,
- &sockfs_dentry_operations, SOCKFS_MAGIC);
+ struct pseudo_fs_context *ctx = init_pseudo(fc, SOCKFS_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->ops = &sockfs_ops;
+ ctx->dops = &sockfs_dentry_operations;
+ ctx->xattr = sockfs_xattr_handlers;
+ return 0;
}
static struct vfsmount *sock_mnt __read_mostly;
static struct file_system_type sock_fs_type = {
.name = "sockfs",
- .mount = sockfs_mount,
+ .init_fs_context = sockfs_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/string.h>
#include <linux/pagemap.h>
#include <linux/mount.h>
+#include <linux/fs_context.h>
#include <linux/namei.h>
#include <linux/fsnotify.h>
#include <linux/kernel.h>
}
static int
-rpc_fill_super(struct super_block *sb, void *data, int silent)
+rpc_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct inode *inode;
struct dentry *root, *gssd_dentry;
- struct net *net = get_net(sb->s_fs_info);
+ struct net *net = sb->s_fs_info;
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
int err;
}
EXPORT_SYMBOL_GPL(gssd_running);
-static struct dentry *
-rpc_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int rpc_fs_get_tree(struct fs_context *fc)
+{
+ fc->s_fs_info = get_net(fc->net_ns);
+ return vfs_get_super(fc, vfs_get_keyed_super, rpc_fill_super);
+}
+
+static void rpc_fs_free_fc(struct fs_context *fc)
{
- struct net *net = current->nsproxy->net_ns;
- return mount_ns(fs_type, flags, data, net, net->user_ns, rpc_fill_super);
+ if (fc->s_fs_info)
+ put_net(fc->s_fs_info);
+}
+
+static const struct fs_context_operations rpc_fs_context_ops = {
+ .free = rpc_fs_free_fc,
+ .get_tree = rpc_fs_get_tree,
+};
+
+static int rpc_init_fs_context(struct fs_context *fc)
+{
+ put_user_ns(fc->user_ns);
+ fc->user_ns = get_user_ns(fc->net_ns->user_ns);
+ fc->ops = &rpc_fs_context_ops;
+ return 0;
}
static void rpc_kill_sb(struct super_block *sb)
static struct file_system_type rpc_pipe_fs_type = {
.owner = THIS_MODULE,
.name = "rpc_pipefs",
- .mount = rpc_mount,
+ .init_fs_context = rpc_init_fs_context,
.kill_sb = rpc_kill_sb,
};
MODULE_ALIAS_FS("rpc_pipefs");
#include <linux/capability.h>
#include <linux/rcupdate.h>
#include <linux/fs.h>
+#include <linux/fs_context.h>
#include <linux/poll.h>
#include <uapi/linux/major.h>
#include <uapi/linux/magic.h>
.show_path = aafs_show_path,
};
-static int fill_super(struct super_block *sb, void *data, int silent)
+static int apparmorfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
static struct tree_descr files[] = { {""} };
int error;
return 0;
}
-static struct dentry *aafs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int apparmorfs_get_tree(struct fs_context *fc)
{
- return mount_single(fs_type, flags, data, fill_super);
+ return get_tree_single(fc, apparmorfs_fill_super);
+}
+
+static const struct fs_context_operations apparmorfs_context_ops = {
+ .get_tree = apparmorfs_get_tree,
+};
+
+static int apparmorfs_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &apparmorfs_context_ops;
+ return 0;
}
static struct file_system_type aafs_ops = {
.owner = THIS_MODULE,
.name = AAFS_NAME,
- .mount = aafs_mount,
+ .init_fs_context = apparmorfs_init_fs_context,
.kill_sb = kill_anon_super,
};
#include <linux/sysfs.h>
#include <linux/kobject.h>
#include <linux/fs.h>
+#include <linux/fs_context.h>
#include <linux/mount.h>
#include <linux/pagemap.h>
#include <linux/init.h>
.free_inode = securityfs_free_inode,
};
-static int fill_super(struct super_block *sb, void *data, int silent)
+static int securityfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
static const struct tree_descr files[] = {{""}};
int error;
return 0;
}
-static struct dentry *get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int securityfs_get_tree(struct fs_context *fc)
{
- return mount_single(fs_type, flags, data, fill_super);
+ return get_tree_single(fc, securityfs_fill_super);
+}
+
+static const struct fs_context_operations securityfs_context_ops = {
+ .get_tree = securityfs_get_tree,
+};
+
+static int securityfs_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &securityfs_context_ops;
+ return 0;
}
static struct file_system_type fs_type = {
.owner = THIS_MODULE,
.name = "securityfs",
- .mount = get_sb,
+ .init_fs_context = securityfs_init_fs_context,
.kill_sb = kill_litter_super,
};
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
+#include <linux/fs_context.h>
#include <linux/mount.h>
#include <linux/mutex.h>
#include <linux/init.h>
#define NULL_FILE_NAME "null"
-static int sel_fill_super(struct super_block *sb, void *data, int silent)
+static int sel_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct selinux_fs_info *fsi;
int ret;
return ret;
}
-static struct dentry *sel_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int sel_get_tree(struct fs_context *fc)
{
- return mount_single(fs_type, flags, data, sel_fill_super);
+ return get_tree_single(fc, sel_fill_super);
+}
+
+static const struct fs_context_operations sel_context_ops = {
+ .get_tree = sel_get_tree,
+};
+
+static int sel_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &sel_context_ops;
+ return 0;
}
static void sel_kill_sb(struct super_block *sb)
static struct file_system_type sel_fs_type = {
.name = "selinuxfs",
- .mount = sel_mount,
+ .init_fs_context = sel_init_fs_context,
.kill_sb = sel_kill_sb,
};
#include <linux/ctype.h>
#include <linux/audit.h>
#include <linux/magic.h>
+#include <linux/fs_context.h>
#include "smack.h"
#define BEBITS (sizeof(__be32) * 8)
/**
* smk_fill_super - fill the smackfs superblock
* @sb: the empty superblock
- * @data: unused
- * @silent: unused
+ * @fc: unused
*
* Fill in the well known entries for the smack filesystem
*
* Returns 0 on success, an error code on failure
*/
-static int smk_fill_super(struct super_block *sb, void *data, int silent)
+static int smk_fill_super(struct super_block *sb, struct fs_context *fc)
{
int rc;
}
/**
- * smk_mount - get the smackfs superblock
- * @fs_type: passed along without comment
- * @flags: passed along without comment
- * @dev_name: passed along without comment
- * @data: passed along without comment
+ * smk_get_tree - get the smackfs superblock
+ * @fc: The mount context, including any options
*
* Just passes everything along.
*
* Returns what the lower level code does.
*/
-static struct dentry *smk_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int smk_get_tree(struct fs_context *fc)
{
- return mount_single(fs_type, flags, data, smk_fill_super);
+ return get_tree_single(fc, smk_fill_super);
+}
+
+static const struct fs_context_operations smk_context_ops = {
+ .get_tree = smk_get_tree,
+};
+
+/**
+ * smk_init_fs_context - Initialise a filesystem context for smackfs
+ * @fc: The blank mount context
+ */
+static int smk_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &smk_context_ops;
+ return 0;
}
static struct file_system_type smk_fs_type = {
.name = "smackfs",
- .mount = smk_mount,
+ .init_fs_context = smk_init_fs_context,
.kill_sb = kill_litter_super,
};
projects / linux-2.6-block.git / commitdiff