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authorDavid Howells <dhowells@redhat.com>2018-11-04 03:19:03 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2019-01-30 17:44:23 -0500
commit9bc61ab18b1d41f26dc06b9e6d3c203e65f83fe6 (patch)
tree4aa7a18d6f2de4f147b5515d99e9fcae897c49a0 /fs/Makefile
parent74e831221cfd79460ec11c1b641093863f0ef3ce (diff)
downloadlinux-stericsson-9bc61ab18b1d41f26dc06b9e6d3c203e65f83fe6.tar.gz
vfs: Introduce fs_context, switch vfs_kern_mount() to it.
Introduce a filesystem context concept to be used during superblock creation for mount and superblock reconfiguration for remount. This is allocated at the beginning of the mount procedure and into it is placed: (1) Filesystem type. (2) Namespaces. (3) Source/Device names (there may be multiple). (4) Superblock flags (SB_*). (5) Security details. (6) Filesystem-specific data, as set by the mount options. Accessor functions are then provided to set up a context, parameterise it from monolithic mount data (the data page passed to mount(2)) and tear it down again. A legacy wrapper is provided that implements what will be the basic operations, wrapping access to filesystems that aren't yet aware of the fs_context. Finally, vfs_kern_mount() is changed to make use of the fs_context and mount_fs() is replaced by vfs_get_tree(), called from vfs_kern_mount(). [AV -- add missing kstrdup()] [AV -- put_cred() can be unconditional - fc->cred can't be NULL] [AV -- take legacy_validate() contents into legacy_parse_monolithic()] [AV -- merge KERNEL_MOUNT and USER_MOUNT] [AV -- don't unlock superblock on success return from vfs_get_tree()] [AV -- kill 'reference' argument of init_fs_context()] Signed-off-by: David Howells <dhowells@redhat.com> Co-developed-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/Makefile')
-rw-r--r--fs/Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/Makefile b/fs/Makefile
index 293733f61594..5563cf34f7c2 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -12,7 +12,8 @@ obj-y := open.o read_write.o file_table.o super.o \
attr.o bad_inode.o file.o filesystems.o namespace.o \
seq_file.o xattr.o libfs.o fs-writeback.o \
pnode.o splice.o sync.o utimes.o d_path.o \
- stack.o fs_struct.o statfs.o fs_pin.o nsfs.o
+ stack.o fs_struct.o statfs.o fs_pin.o nsfs.o \
+ fs_context.o
ifeq ($(CONFIG_BLOCK),y)
obj-y += buffer.o block_dev.o direct-io.o mpage.o