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21cb47be6f
linux/fs
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Christian Brauner 21cb47be6f
inode: make init and permission helpers idmapped mount aware 
The inode_owner_or_capable() helper determines whether the caller is the
owner of the inode or is capable with respect to that inode. Allow it to
handle idmapped mounts. If the inode is accessed through an idmapped
mount it according to the mount's user namespace. Afterwards the checks
are identical to non-idmapped mounts. If the initial user namespace is
passed nothing changes so non-idmapped mounts will see identical
behavior as before.

Similarly, allow the inode_init_owner() helper to handle idmapped
mounts. It initializes a new inode on idmapped mounts by mapping the
fsuid and fsgid of the caller from the mount's user namespace. If the
initial user namespace is passed nothing changes so non-idmapped mounts
will see identical behavior as before.

Link: https://lore.kernel.org/r/20210121131959.646623-7-christian.brauner@ubuntu.com
Cc: Christoph Hellwig <hch@lst.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
2021-01-24 14:27:16 +01:00
..
9p inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
adfs Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-24 12:26:05 -07:00
affs Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-24 12:26:05 -07:00
afs afs: Fix directory entry size calculation 2021-01-04 12:25:19 +00:00
autofs file: Replace ksys_close with close_fd 2020-12-10 12:42:59 -06:00
befs [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
bfs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
btrfs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
cachefiles cachefiles: Handle readpage error correctly 2020-10-26 10:42:54 -07:00
ceph namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
cifs namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
coda
configfs namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
cramfs [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
crypto inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
debugfs debugfs: remove return value of debugfs_create_devm_seqfile() 2020-10-30 08:37:39 +01:00
devpts
dlm fs: dlm: check on existing node address 2020-11-10 12:14:20 -06:00
ecryptfs namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
efivarfs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
efs [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
erofs erofs: avoid using generic_block_bmap 2020-12-10 11:07:40 +08:00
exfat exfat: Avoid allocating upcase table using kcalloc() 2020-12-22 12:31:17 +09:00
exportfs exportfs: Add a function to return the raw output from fh_to_dentry() 2020-12-09 09:39:38 -05:00
ext2 inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
ext4 inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
f2fs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
fat [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
freevxfs
fscache Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
fuse namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
gfs2 inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
hfs fs: Replace zero-length array with flexible-array member 2020-10-29 17:22:59 -05:00
hfsplus inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
hostfs namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
hpfs [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
hugetlbfs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
iomap mm: memcontrol: Use helpers to read page's memcg data 2020-12-02 18:28:05 -08:00
isofs fs: Replace zero-length array with flexible-array member 2020-10-29 17:22:59 -05:00
jbd2 jbd2: add a helper to find out number of fast commit blocks 2020-12-17 13:30:45 -05:00
jffs2 jffs2: Fix NULL pointer dereference in rp_size fs option parsing 2020-12-13 21:57:21 +01:00
jfs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
kernfs namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
lockd fs/lockd: convert comma to semicolon 2020-12-16 07:57:37 -05:00
minix inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
nfs namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
nfs_common nfs_common: need lock during iterate through the list 2020-12-09 09:38:34 -05:00
nfsd namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
nilfs2 inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
nls treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
notify fs: add file and path permissions helpers 2021-01-24 14:27:16 +01:00
ntfs fs/ntfs: remove unused variable attr_len 2020-12-15 12:13:37 -08:00
ocfs2 inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
omfs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
openpromfs
orangefs namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
overlayfs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
proc namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
pstore Tracing updates for 5.11 2020-12-17 13:22:17 -08:00
qnx4 [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
qnx6 [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
quota \n 2020-12-17 11:00:37 -08:00
ramfs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
reiserfs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
romfs Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-24 12:26:05 -07:00
squashfs Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-24 12:26:05 -07:00
sysfs sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output 2020-10-02 12:02:30 +02:00
sysv inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
tracefs
ubifs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
udf inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
ufs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
unicode unicode: Add utf8_casefold_hash 2020-09-10 14:03:31 -07:00
vboxsf Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2020-10-15 15:11:56 -07:00
verity fs: add file and path permissions helpers 2021-01-24 14:27:16 +01:00
xfs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
zonefs inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
aio.c Merge branch 'akpm' (patches from Andrew) 2020-12-15 12:53:37 -08:00
anon_inodes.c
attr.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
bad_inode.c fs: move the fiemap definitions out of fs.h 2020-06-03 23:16:55 -04:00
binfmt_aout.c
binfmt_elf_fdpic.c binfmt_elf, binfmt_elf_fdpic: use a VMA list snapshot 2020-10-16 11:11:21 -07:00
binfmt_elf.c Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2020-12-15 19:29:43 -08:00
binfmt_em86.c Merge branch 'akpm' (patches from Andrew) 2020-06-04 19:18:29 -07:00
binfmt_flat.c binfmt_flat: revert "binfmt_flat: don't offset the data start" 2020-08-24 08:49:13 +10:00
binfmt_misc.c Merge branch 'akpm' (patches from Andrew) 2020-06-04 19:18:29 -07:00
binfmt_script.c Merge branch 'akpm' (patches from Andrew) 2020-06-04 19:18:29 -07:00
block_dev.c block: pre-initialize struct block_device in bdev_alloc_inode 2021-01-07 20:57:53 -07:00
buffer.c for-5.11/block-2020-12-14 2020-12-16 12:57:51 -08:00
char_dev.c
compat_binfmt_elf.c elf: Expose ELF header on arch_setup_additional_pages() 2020-10-26 13:46:47 +01:00
coredump.c Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2020-12-15 19:29:43 -08:00
d_path.c fs: fix NULL dereference due to data race in prepend_path() 2020-10-14 14:54:45 -07:00
dax.c mm: simplify follow_pte{,pmd} 2020-12-15 22:46:19 -08:00
dcache.c fs: Kill DCACHE_DONTCACHE dentry even if DCACHE_REFERENCED is set 2020-12-10 17:33:17 -05:00
dcookies.c
direct-io.c \n 2020-10-15 15:03:10 -07:00
drop_caches.c
eventfd.c eventfd: Export eventfd_ctx_do_read() 2020-11-15 09:49:10 -05:00
eventpoll.c epoll: add syscall epoll_pwait2 2020-12-19 11:18:38 -08:00
exec.c namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
fcntl.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
fhandle.c
file_table.c epoll: take epitem list out of struct file 2020-10-25 20:02:08 -04:00
file.c kernel/io_uring: cancel io_uring before task works 2020-12-30 19:36:54 -07:00
filesystems.c
fs_context.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
fs_parser.c fs_parse: mark fs_param_bad_value() as static 2020-10-13 18:38:27 -07:00
fs_pin.c
fs_struct.c vfs: Use sequence counter with associated spinlock 2020-07-29 16:14:27 +02:00
fs_types.c
fs-writeback.c writeback: don't warn on an unregistered BDI in __mark_inode_dirty 2020-12-16 11:56:02 +01:00
fsopen.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
init.c fs: add file and path permissions helpers 2021-01-24 14:27:16 +01:00
inode.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
internal.h for-5.11/block-2020-12-14 2020-12-16 12:57:51 -08:00
io_uring.c io_uring: ensure finish_wait() is always called in __io_uring_task_cancel() 2021-01-15 16:04:23 -07:00
io-wq.c io-wq: kill now unused io_wq_cancel_all() 2020-12-20 10:47:42 -07:00
io-wq.h io-wq: kill now unused io_wq_cancel_all() 2020-12-20 10:47:42 -07:00
ioctl.c fs: remove ksys_ioctl 2020-07-31 08:16:01 +02:00
Kconfig tmpfs: support 64-bit inums per-sb 2020-08-07 11:33:24 -07:00
Kconfig.binfmt treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
kernel_read_file.c fs/kernel_file_read: Add "offset" arg for partial reads 2020-10-05 13:37:04 +02:00
libfs.c namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
locks.c Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2020-12-15 19:29:43 -08:00
Makefile Refactored code for 5.10: 2020-10-23 11:33:41 -07:00
mbcache.c
mount.h mnt: Use generic ns_common::count 2020-08-19 14:14:19 +02:00
mpage.c fs: convert mpage_readpages to mpage_readahead 2020-06-02 10:59:07 -07:00
namei.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
namespace.c mount: attach mappings to mounts 2021-01-24 14:27:15 +01:00
no-block.c
nsfs.c
open.c namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
pipe.c block: remove i_bdev 2020-12-01 14:53:39 -07:00
pnode.c
pnode.h fs/namespace.c: WARN if mnt_count has become negative 2020-12-10 17:33:17 -05:00
posix_acl.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
proc_namespace.c proc mountinfo: make splice available again 2020-12-27 12:00:36 -08:00
read_write.c Refactored code for 5.10: 2020-10-23 11:33:41 -07:00
readdir.c fs: remove ksys_getdents64 2020-07-31 08:16:00 +02:00
remap_range.c namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
select.c poll: fix performance regression due to out-of-line __put_user() 2021-01-08 11:06:29 -08:00
seq_file.c fix return values of seq_read_iter() 2020-11-15 22:12:53 -05:00
signalfd.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
splice.c io_uring-5.10-2020-10-24 2020-10-24 12:40:18 -07:00
stack.c
stat.c fs: remove KSTAT_QUERY_FLAGS 2020-09-26 22:55:05 -04:00
statfs.c block: remove i_bdev 2020-12-01 14:53:39 -07:00
super.c block: remove i_bdev 2020-12-01 14:53:39 -07:00
sync.c overlayfs update for 5.8 2020-06-09 15:40:50 -07:00
timerfd.c
userfaultfd.c userfaultfd: add user-mode only option to unprivileged_userfaultfd sysctl knob 2020-12-15 12:13:46 -08:00
utimes.c fs: expose utimes_common 2020-07-31 08:16:01 +02:00
xattr.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00