On Tuesday, April 30, 2019 11:35:08 PM IST Eric Biggers wrote: > On Sun, Apr 28, 2019 at 10:01:10AM +0530, Chandan Rajendra wrote: > > The "read callbacks" code is used by both Ext4 and F2FS. Hence to > > remove duplicity, this commit moves the code into > > include/linux/read_callbacks.h and fs/read_callbacks.c. > > > > The corresponding decrypt and verity "work" functions have been moved > > inside fscrypt and fsverity sources. With these in place, the read > > callbacks code now has to just invoke enqueue functions provided by > > fscrypt and fsverity. > > > > Signed-off-by: Chandan Rajendra <chandan@xxxxxxxxxxxxx> > > --- > > fs/Kconfig | 4 + > > fs/Makefile | 4 + > > fs/crypto/Kconfig | 1 + > > fs/crypto/bio.c | 23 ++--- > > fs/crypto/crypto.c | 17 +-- > > fs/crypto/fscrypt_private.h | 3 + > > fs/ext4/ext4.h | 2 - > > fs/ext4/readpage.c | 183 +++++---------------------------- > > fs/ext4/super.c | 9 +- > > fs/f2fs/data.c | 148 ++++---------------------- > > fs/f2fs/super.c | 9 +- > > fs/read_callbacks.c | 136 ++++++++++++++++++++++++ > > fs/verity/Kconfig | 1 + > > fs/verity/verify.c | 12 +++ > > include/linux/fscrypt.h | 20 +--- > > include/linux/read_callbacks.h | 21 ++++ > > 16 files changed, 251 insertions(+), 342 deletions(-) > > create mode 100644 fs/read_callbacks.c > > create mode 100644 include/linux/read_callbacks.h > > > > diff --git a/fs/Kconfig b/fs/Kconfig > > index 97f9eb8df713..03084f2dbeaf 100644 > > --- a/fs/Kconfig > > +++ b/fs/Kconfig > > @@ -308,6 +308,10 @@ config NFS_COMMON > > depends on NFSD || NFS_FS || LOCKD > > default y > > > > +config FS_READ_CALLBACKS > > + bool > > + default n > > + > > source "net/sunrpc/Kconfig" > > source "fs/ceph/Kconfig" > > source "fs/cifs/Kconfig" > > This shouldn't be under the 'if NETWORK_FILESYSTEMS' block, since it has nothing > to do with network filesystems. When trying to compile this I got: > > WARNING: unmet direct dependencies detected for FS_READ_CALLBACKS > Depends on [n]: NETWORK_FILESYSTEMS [=n] > Selected by [y]: > - FS_ENCRYPTION [=y] > - FS_VERITY [=y] > > Perhaps put it just below FS_IOMAP? > > > diff --git a/fs/Makefile b/fs/Makefile > > index 9dd2186e74b5..e0c0fce8cf40 100644 > > --- a/fs/Makefile > > +++ b/fs/Makefile > > @@ -21,6 +21,10 @@ else > > obj-y += no-block.o > > endif > > > > +ifeq ($(CONFIG_FS_READ_CALLBACKS),y) > > +obj-y += read_callbacks.o > > +endif > > + > > obj-$(CONFIG_PROC_FS) += proc_namespace.o > > > > obj-y += notify/ > > diff --git a/fs/crypto/Kconfig b/fs/crypto/Kconfig > > index f0de238000c0..163c328bcbd4 100644 > > --- a/fs/crypto/Kconfig > > +++ b/fs/crypto/Kconfig > > @@ -8,6 +8,7 @@ config FS_ENCRYPTION > > select CRYPTO_CTS > > select CRYPTO_SHA256 > > select KEYS > > + select FS_READ_CALLBACKS > > help > > Enable encryption of files and directories. This > > feature is similar to ecryptfs, but it is more memory > > This selection needs to be conditional on BLOCK. > > select FS_READ_CALLBACKS if BLOCK > > Otherwise, building without BLOCK and with UBIFS encryption support fails. > > fs/read_callbacks.c: In function ‘end_read_callbacks’: > fs/read_callbacks.c:34:23: error: storage size of ‘iter_all’ isn’t known > struct bvec_iter_all iter_all; > ^~~~~~~~ > fs/read_callbacks.c:37:20: error: dereferencing pointer to incomplete type ‘struct buffer_head’ > if (!PageError(bh->b_page)) > > [...] > I will fix this in the next version of this patchset. -- chandan
