linux/fs/ceph/Kconfig
Jeff Layton 400e1286c0 ceph: conversion to new fscache API
Now that the fscache API has been reworked and simplified, change ceph
over to use it.

With the old API, we would only instantiate a cookie when the file was
open for reads. Change it to instantiate the cookie when the inode is
instantiated and call use/unuse when the file is opened/closed.

Also, ensure we resize the cached data on truncates, and invalidate the
cache in response to the appropriate events. This will allow us to
plumb in write support later.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20211129162907.149445-2-jlayton@kernel.org/ # v1
Link: https://lore.kernel.org/r/20211207134451.66296-2-jlayton@kernel.org/ # v2
Link: https://lore.kernel.org/r/163906984277.143852.14697110691303589000.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/163967188351.1823006.5065634844099079351.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/164021581427.640689.14128682147127509264.stgit@warthog.procyon.org.uk/ # v4
2022-01-11 22:13:01 +00:00

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# SPDX-License-Identifier: GPL-2.0-only
config CEPH_FS
tristate "Ceph distributed file system"
depends on INET
select CEPH_LIB
select LIBCRC32C
select CRYPTO_AES
select CRYPTO
select NETFS_SUPPORT
default n
help
Choose Y or M here to include support for mounting the
experimental Ceph distributed file system. Ceph is an extremely
scalable file system designed to provide high performance,
reliable access to petabytes of storage.
More information at https://ceph.io/.
If unsure, say N.
if CEPH_FS
config CEPH_FSCACHE
bool "Enable Ceph client caching support"
depends on CEPH_FS=m && FSCACHE || CEPH_FS=y && FSCACHE=y
help
Choose Y here to enable persistent, read-only local
caching support for Ceph clients using FS-Cache
endif
config CEPH_FS_POSIX_ACL
bool "Ceph POSIX Access Control Lists"
depends on CEPH_FS
select FS_POSIX_ACL
help
POSIX Access Control Lists (ACLs) support permissions for users and
groups beyond the owner/group/world scheme.
If you don't know what Access Control Lists are, say N
config CEPH_FS_SECURITY_LABEL
bool "CephFS Security Labels"
depends on CEPH_FS && SECURITY
help
Security labels support alternative access control models
implemented by security modules like SELinux. This option
enables an extended attribute handler for file security
labels in the Ceph filesystem.
If you are not using a security module that requires using
extended attributes for file security labels, say N.