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authorDavid Howells <dhowells@redhat.com>2019-03-25 16:38:31 +0000
committerAl Viro <viro@zeniv.linux.org.uk>2019-09-05 14:34:24 -0400
commitb941759985841f4be41002eacb93b2f32f835351 (patch)
treef526564e20bdb20fab806f5cf1eaa10d09b67280 /fs/romfs
parent43ce4c1feadbc84c772518a2d1974f6ba1b15089 (diff)
vfs: Convert romfs to use the new mount API
Convert the romfs filesystem to the new internal mount API as the old one will be obsoleted and removed. This allows greater flexibility in communication of mount parameters between userspace, the VFS and the filesystem. See Documentation/filesystems/mount_api.txt for more information. Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-mtd@lists.infradead.org cc: linux-block@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/romfs')
-rw-r--r--fs/romfs/super.c46
1 files changed, 28 insertions, 18 deletions
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index 7d580f7c3f1d..8d198b9ecf8a 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -65,7 +65,7 @@
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/blkdev.h>
-#include <linux/parser.h>
+#include <linux/fs_context.h>
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/statfs.h>
@@ -423,10 +423,10 @@ static int romfs_statfs(struct dentry *dentry, struct kstatfs *buf)
/*
* remounting must involve read-only
*/
-static int romfs_remount(struct super_block *sb, int *flags, char *data)
+static int romfs_reconfigure(struct fs_context *fc)
{
- sync_filesystem(sb);
- *flags |= SB_RDONLY;
+ sync_filesystem(fc->root->d_sb);
+ fc->sb_flags |= SB_RDONLY;
return 0;
}
@@ -434,7 +434,6 @@ static const struct super_operations romfs_super_ops = {
.alloc_inode = romfs_alloc_inode,
.free_inode = romfs_free_inode,
.statfs = romfs_statfs,
- .remount_fs = romfs_remount,
};
/*
@@ -457,7 +456,7 @@ static __u32 romfs_checksum(const void *data, int size)
/*
* fill in the superblock
*/
-static int romfs_fill_super(struct super_block *sb, void *data, int silent)
+static int romfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct romfs_super_block *rsb;
struct inode *root;
@@ -504,8 +503,8 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
if (rsb->word0 != ROMSB_WORD0 || rsb->word1 != ROMSB_WORD1 ||
img_size < ROMFH_SIZE) {
- if (!silent)
- pr_warn("VFS: Can't find a romfs filesystem on dev %s.\n",
+ if (!(fc->sb_flags & SB_SILENT))
+ errorf(fc, "VFS: Can't find a romfs filesystem on dev %s.\n",
sb->s_id);
goto error_rsb_inval;
}
@@ -518,7 +517,7 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
storage = sb->s_mtd ? "MTD" : "the block layer";
len = strnlen(rsb->name, ROMFS_MAXFN);
- if (!silent)
+ if (!(fc->sb_flags & SB_SILENT))
pr_notice("Mounting image '%*.*s' through %s\n",
(unsigned) len, (unsigned) len, rsb->name, storage);
@@ -548,23 +547,34 @@ error_rsb:
/*
* get a superblock for mounting
*/
-static struct dentry *romfs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int romfs_get_tree(struct fs_context *fc)
{
- struct dentry *ret = ERR_PTR(-EINVAL);
+ int ret = -EINVAL;
#ifdef CONFIG_ROMFS_ON_MTD
- ret = mount_mtd(fs_type, flags, dev_name, data, romfs_fill_super);
+ ret = get_tree_mtd(fc, romfs_fill_super);
#endif
#ifdef CONFIG_ROMFS_ON_BLOCK
- if (ret == ERR_PTR(-EINVAL))
- ret = mount_bdev(fs_type, flags, dev_name, data,
- romfs_fill_super);
+ if (ret == -EINVAL)
+ ret = get_tree_bdev(fc, romfs_fill_super);
#endif
return ret;
}
+static const struct fs_context_operations romfs_context_ops = {
+ .get_tree = romfs_get_tree,
+ .reconfigure = romfs_reconfigure,
+};
+
+/*
+ * Set up the filesystem mount context.
+ */
+static int romfs_init_fs_context(struct fs_context *fc)
+{
+ fc->ops = &romfs_context_ops;
+ return 0;
+}
+
/*
* destroy a romfs superblock in the appropriate manner
*/
@@ -587,7 +597,7 @@ static void romfs_kill_sb(struct super_block *sb)
static struct file_system_type romfs_fs_type = {
.owner = THIS_MODULE,
.name = "romfs",
- .mount = romfs_mount,
+ .init_fs_context = romfs_init_fs_context,
.kill_sb = romfs_kill_sb,
.fs_flags = FS_REQUIRES_DEV,
};