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linux-stable/fs/nfs
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Sargun Dhillon d3ff46fe69 NFSv4: Refactor to use user namespaces for nfs4idmap 
In several patches work has been done to enable NFSv4 to use user
namespaces:
58002399da: NFSv4: Convert the NFS client idmapper to use the container user namespace
3b7eb5e35d: NFS: When mounting, don't share filesystems between different user namespaces

Unfortunately, the userspace APIs were only such that the userspace facing
side of the filesystem (superblock s_user_ns) could be set to a non init
user namespace. This furthers the fs_context related refactoring, and
piggybacks on top of that logic, so the superblock user namespace, and the
NFS user namespace are the same.

Users can still use rpc.idmapd if they choose to, but there are complexities
with user namespaces and request-key that have yet to be addresssed.

Eventually, we will need to at least:
  * Come up with an upcall mechanism that can be triggered inside of the container,
    or safely triggered outside, with the requisite context to do the right
    mapping. * Handle whatever refactoring needs to be done in net/sunrpc.

Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Tested-by: Alban Crequy <alban.crequy@gmail.com>
Fixes: 62a55d088c ("NFS: Additional refactoring for fs_context conversion")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-02 14:05:54 -05:00
..
blocklayout treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
filelayout treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
flexfilelayout pNFS/flexfiles: Fix up layoutstats reporting for non-TCP transports 2020-12-02 14:05:53 -05:00
cache_lib.c
cache_lib.h
callback.c SUNRPC: Cache the process user cred in the RPC server listener 2019-04-24 09:46:35 -04:00
callback.h NFSv4: Add support for CB_RECALL_ANY for flexfiles layouts 2020-03-16 08:34:30 -04:00
callback_proc.c NFSv4: Add support for CB_RECALL_ANY for flexfiles layouts 2020-03-16 08:34:30 -04:00
callback_xdr.c NFS4: Report callback authentication errors 2020-01-15 10:54:31 -05:00
client.c NFS: NFSv2/NFSv3: Use cred from fs_context during mount 2020-12-02 14:05:54 -05:00
delegation.c NFS: Beware when dereferencing the delegation cred 2020-04-03 18:26:02 -04:00
delegation.h NFSv4: Ensure the delegation is pinned in nfs_do_return_delegation() 2020-02-13 16:18:50 -05:00
dir.c NFS: Do uncached readdir when we're seeking a cookie in an empty page cache 2020-12-02 14:05:52 -05:00
direct.c NFS client updates for Linux 5.9 2020-08-15 08:26:55 -07:00
dns_resolve.c NFS: remove duplicate headers 2020-05-27 10:10:12 -04:00
dns_resolve.h
export.c NFS: Add a tracepoint in nfs_fh_to_dentry() 2019-11-03 21:28:46 -05:00
file.c NFS client updates for Linux 5.9 2020-08-15 08:26:55 -07:00
fs_context.c NFS: Switch mount code to use xprt_find_transport_ident() 2020-12-02 14:05:53 -05:00
fscache-index.c nfs: fscache: use timespec64 in inode auxdata 2020-01-15 10:54:30 -05:00
fscache.c NFSv4: Fix fscache cookie aux_data to ensure change_attr is included 2020-05-08 22:20:24 +01:00
fscache.h nfs: fscache: use timespec64 in inode auxdata 2020-01-15 10:54:30 -05:00
getroot.c NFS: Ensure security label is set for root inode 2020-03-30 19:56:50 -04:00
inode.c NFS: Improve handling of directory verifiers 2020-12-02 14:05:52 -05:00
internal.h NFS: Support larger readdir buffers 2020-12-02 14:05:52 -05:00
io.c
iostat.h
Kconfig Documentation: nfsroot.rst: Fix references to nfsroot.rst 2020-03-02 13:11:46 -07:00
Makefile NFSv4.2: add client side xattr caching. 2020-07-13 17:52:46 -04:00
mount_clnt.c NFSv3: fix rpc receive buffer size for MOUNT call 2020-05-14 18:42:44 -04:00
namespace.c NFS: fix nfs_path in case of a rename retry 2020-10-06 10:21:18 -04:00
netns.h NFS: Add sysfs support for per-container identifier 2019-07-06 14:54:49 -04:00
nfs.h
nfs2super.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nfs2xdr.c SUNRPC: Clean up the handling of page padding in rpc_prepare_reply_pages() 2020-12-02 14:05:53 -05:00
nfs3_fs.h NFS: Additional refactoring for fs_context conversion 2020-01-15 10:15:17 -05:00
nfs3acl.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfs3client.c NFS: Additional refactoring for fs_context conversion 2020-01-15 10:15:17 -05:00
nfs3proc.c NFS: Allow the NFS generic code to pass in a verifier to readdir 2020-12-02 14:05:52 -05:00
nfs3super.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nfs3xdr.c SUNRPC: Clean up the handling of page padding in rpc_prepare_reply_pages() 2020-12-02 14:05:53 -05:00
nfs4_fs.h NFSv4: Wait for stateid updates after CLOSE/OPEN_DOWNGRADE 2020-10-02 08:43:09 -04:00
nfs4client.c NFSv4: Refactor to use user namespaces for nfs4idmap 2020-12-02 14:05:54 -05:00
nfs4file.c NFSv4.2: Fix 5 seconds delay when doing inter server copy 2020-12-02 13:45:33 -05:00
nfs4getroot.c
nfs4idmap.c NFS: Only reference user namespace from nfs4idmap struct instead of cred 2020-10-13 15:56:54 -04:00
nfs4idmap.h
nfs4namespace.c nfs: Fix memory leak of export_path 2020-06-26 08:43:14 -04:00
nfs4proc.c NFS: Handle NFS4ERR_NOT_SAME and NFSERR_BADCOOKIE from readdir calls 2020-12-02 14:05:52 -05:00
nfs4renewd.c NFSv4.0: nfs4_do_fsinfo() should not do implicit lease renewals 2020-02-04 12:27:55 -05:00
nfs4session.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
nfs4session.h NFSv4.1: Bump the default callback session slot count to 16 2019-03-02 16:25:26 -05:00
nfs4state.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfs4super.c NFSv4: Fix a pNFS layout related use-after-free race when freeing the inode 2020-12-02 14:05:54 -05:00
nfs4sysctl.c
nfs4trace.c pNFS/flexfiles: Add tracing for layout errors 2020-01-15 10:54:33 -05:00
nfs4trace.h NFSv4: Wait for stateid updates after CLOSE/OPEN_DOWNGRADE 2020-10-02 08:43:09 -04:00
nfs4xdr.c NFSv4: Fix open coded xdr_stream_remaining() 2020-12-02 14:05:54 -05:00
nfs42.h NFSv4.2: add the extended attribute proc functions. 2020-07-13 17:52:45 -04:00
nfs42proc.c NFS: Fix rpcrdma_inline_fixup() crash with new LISTXATTRS operation 2020-12-02 13:19:20 -05:00
nfs42xattr.c NFSv4.2: fix failure to unregister shrinker 2020-11-12 10:40:02 -05:00
nfs42xdr.c NFS: Fix rpcrdma_inline_fixup() crash with new LISTXATTRS operation 2020-12-02 13:19:20 -05:00
nfsroot.c nfsroot: Default mount option should ask for built-in NFS version 2020-11-02 10:29:03 -05:00
nfstrace.c
nfstrace.h nfs: define and use the NFS_INO_INVALID_XATTR flag 2020-07-13 17:52:45 -04:00
pagelist.c pNFS/flexfiles: Fix array overflow when flexfiles mirroring is enabled 2020-11-30 10:52:22 -05:00
pnfs.c NFSv4: Fix a pNFS layout related use-after-free race when freeing the inode 2020-12-02 14:05:54 -05:00
pnfs.h NFSv4: Fix a pNFS layout related use-after-free race when freeing the inode 2020-12-02 14:05:54 -05:00
pnfs_dev.c NFS/flexfiles: Speed up read failover when DSes are down 2019-03-01 22:37:38 -05:00
pnfs_nfs.c pNFS: Clean up open coded xdr string decoding 2020-12-02 14:05:53 -05:00
proc.c NFS: Allow the NFS generic code to pass in a verifier to readdir 2020-12-02 14:05:52 -05:00
read.c NFS: Trace short NFS READs 2020-06-11 13:33:48 -04:00
super.c The one new feature this time, from Anna Schumaker, is READ_PLUS, which 2020-10-22 09:44:27 -07:00
symlink.c nfs: pass the correct prototype to read_cache_page 2019-05-09 16:26:57 -04:00
sysctl.c
sysfs.c NFSv4: Fix up RCU annotations for struct nfs_netns_client 2020-10-15 13:31:08 -04:00
sysfs.h NFSv4: Fix up RCU annotations for struct nfs_netns_client 2020-10-15 13:31:08 -04:00
unlink.c NFS: Avoid referencing the cred twice in async rename/unlink 2020-03-16 08:34:29 -04:00
write.c mm/writeback: discard NR_UNSTABLE_NFS, use NR_WRITEBACK instead 2020-06-02 10:59:08 -07:00