This series adds the Linux dcache implementation to barebox. Until now every filesystem driver resolves the full path to a file for itself. This leads to code duplication and is error prone since resolving paths is a complicated task. Also it can narrow down the lookup performance since barebox only knows ASCII paths and has no way of caching lookups. Since with this barebox provides a interface to dentries much like the Linux Kernel does it gets easier to share filesystem code between barebox and Linux. With this series we get the Linux dcache implementation. The path resolving code from fs/namei.c is nearly taken as-is, minus the RCU and locking code. Dcaching is made simple as of now: We simply cache everything and never release any dentries. Although we do reference counting for inodes and dentries it is effectively not used yet. We never free anything until a fs is unmounted in which case we free everything no matter if references are taken or not. To still support filesystems with the old API I now introduced a wrapper layer which binds between the new dentry cache API and old filesystems. Hopefully this can go away soon once all filesystems are converted. Changes since v1: - introduce wrapper layer so we do not have to mark any FS as broken anymore - change squashfs and cramfs to the new API - let tftp return FILESIZE_MAX as inode size as Philipp suggested - lots of small changes Sascha Hauer (10): fs: dentry cache implementation fs: ramfs: Switch to dentry cache implementation fs: devfs: Switch to dentry cache implementation fs: ext4: Switch to dentry cache implementation fs: ubifs: Switch to dentry cache implementation fs: nfs: Switch to dentry cache implementation fs: tftp: Switch to dentry cache implementation fs: cramfs: Switch to dentry cache implementation fs: squashfs: Switch to dentry cache implementation block: Adjust cache sizes common/block.c | 4 +- fs/Kconfig | 18 + fs/Makefile | 3 +- fs/cramfs/cramfs.c | 523 +++--- fs/devfs.c | 150 +- fs/ext4/ext_barebox.c | 279 +-- fs/ext4/ext_common.h | 3 + fs/fat/Kconfig | 1 + fs/fs.c | 3632 ++++++++++++++++++++++++++-------------- fs/legacy.c | 315 ++++ fs/libfs.c | 97 ++ fs/nfs.c | 542 +++--- fs/pstore/Kconfig | 1 + fs/ramfs.c | 401 ++--- fs/squashfs/Makefile | 2 + fs/squashfs/dir.c | 232 +++ fs/squashfs/inode.c | 9 + fs/squashfs/namei.c | 17 +- fs/squashfs/squashfs.c | 186 +- fs/squashfs/squashfs.h | 9 +- fs/squashfs/super.c | 13 +- fs/squashfs/symlink.c | 82 + fs/tftp.c | 97 +- fs/ubifs/Makefile | 2 +- fs/ubifs/dir.c | 410 +++++ fs/ubifs/super.c | 153 +- fs/ubifs/ubifs.c | 341 +--- fs/ubifs/ubifs.h | 7 +- include/dirent.h | 3 + include/fs.h | 38 +- include/linux/dcache.h | 109 +- include/linux/fs.h | 131 +- include/linux/mount.h | 3 + include/linux/namei.h | 52 + include/linux/stat.h | 2 + 35 files changed, 4832 insertions(+), 3035 deletions(-) create mode 100644 fs/legacy.c create mode 100644 fs/libfs.c create mode 100644 fs/squashfs/dir.c create mode 100644 fs/squashfs/symlink.c create mode 100644 fs/ubifs/dir.c create mode 100644 include/linux/namei.h -- 2.17.1 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
