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![Linus Torvalds](/assets/img/avatar_default.png)
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Merge tag 'idmapped-mounts-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull idmapped mounts from Christian Brauner:
"This introduces idmapped mounts which has been in the making for some
time. Simply put, different mounts can expose the same file or
directory with different ownership. This initial implementation comes
with ports for fat, ext4 and with Christoph's port for xfs with more
filesystems being actively worked on by independent people and
maintainers.
Idmapping mounts handle a wide range of long standing use-cases. Here
are just a few:
- Idmapped mounts make it possible to easily share files between
multiple users or multiple machines especially in complex
scenarios. For example, idmapped mounts will be used in the
implementation of portable home directories in
systemd-homed.service(8) where they allow users to move their home
directory to an external storage device and use it on multiple
computers where they are assigned different uids and gids. This
effectively makes it possible to assign random uids and gids at
login time.
- It is possible to share files from the host with unprivileged
containers without having to change ownership permanently through
chown(2).
- It is possible to idmap a container's rootfs and without having to
mangle every file. For example, Chromebooks use it to share the
user's Download folder with their unprivileged containers in their
Linux subsystem.
- It is possible to share files between containers with
non-overlapping idmappings.
- Filesystem that lack a proper concept of ownership such as fat can
use idmapped mounts to implement discretionary access (DAC)
permission checking.
- They allow users to efficiently changing ownership on a per-mount
basis without having to (recursively) chown(2) all files. In
contrast to chown (2) changing ownership of large sets of files is
instantenous with idmapped mounts. This is especially useful when
ownership of a whole root filesystem of a virtual machine or
container is changed. With idmapped mounts a single syscall
mount_setattr syscall will be sufficient to change the ownership of
all files.
- Idmapped mounts always take the current ownership into account as
idmappings specify what a given uid or gid is supposed to be mapped
to. This contrasts with the chown(2) syscall which cannot by itself
take the current ownership of the files it changes into account. It
simply changes the ownership to the specified uid and gid. This is
especially problematic when recursively chown(2)ing a large set of
files which is commong with the aforementioned portable home
directory and container and vm scenario.
- Idmapped mounts allow to change ownership locally, restricting it
to specific mounts, and temporarily as the ownership changes only
apply as long as the mount exists.
Several userspace projects have either already put up patches and
pull-requests for this feature or will do so should you decide to pull
this:
- systemd: In a wide variety of scenarios but especially right away
in their implementation of portable home directories.
https://systemd.io/HOME_DIRECTORY/
- container runtimes: containerd, runC, LXD:To share data between
host and unprivileged containers, unprivileged and privileged
containers, etc. The pull request for idmapped mounts support in
containerd, the default Kubernetes runtime is already up for quite
a while now: https://github.com/containerd/containerd/pull/4734
- The virtio-fs developers and several users have expressed interest
in using this feature with virtual machines once virtio-fs is
ported.
- ChromeOS: Sharing host-directories with unprivileged containers.
I've tightly synced with all those projects and all of those listed
here have also expressed their need/desire for this feature on the
mailing list. For more info on how people use this there's a bunch of
talks about this too. Here's just two recent ones:
https://www.cncf.io/wp-content/uploads/2020/12/Rootless-Containers-in-Gitpod.pdf
https://fosdem.org/2021/schedule/event/containers_idmap/
This comes with an extensive xfstests suite covering both ext4 and
xfs:
https://git.kernel.org/brauner/xfstests-dev/h/idmapped_mounts
It covers truncation, creation, opening, xattrs, vfscaps, setid
execution, setgid inheritance and more both with idmapped and
non-idmapped mounts. It already helped to discover an unrelated xfs
setgid inheritance bug which has since been fixed in mainline. It will
be sent for inclusion with the xfstests project should you decide to
merge this.
In order to support per-mount idmappings vfsmounts are marked with
user namespaces. The idmapping of the user namespace will be used to
map the ids of vfs objects when they are accessed through that mount.
By default all vfsmounts are marked with the initial user namespace.
The initial user namespace is used to indicate that a mount is not
idmapped. All operations behave as before and this is verified in the
testsuite.
Based on prior discussions we want to attach the whole user namespace
and not just a dedicated idmapping struct. This allows us to reuse all
the helpers that already exist for dealing with idmappings instead of
introducing a whole new range of helpers. In addition, if we decide in
the future that we are confident enough to enable unprivileged users
to setup idmapped mounts the permission checking can take into account
whether the caller is privileged in the user namespace the mount is
currently marked with.
The user namespace the mount will be marked with can be specified by
passing a file descriptor refering to the user namespace as an
argument to the new mount_setattr() syscall together with the new
MOUNT_ATTR_IDMAP flag. The system call follows the openat2() pattern
of extensibility.
The following conditions must be met in order to create an idmapped
mount:
- The caller must currently have the CAP_SYS_ADMIN capability in the
user namespace the underlying filesystem has been mounted in.
- The underlying filesystem must support idmapped mounts.
- The mount must not already be idmapped. This also implies that the
idmapping of a mount cannot be altered once it has been idmapped.
- The mount must be a detached/anonymous mount, i.e. it must have
been created by calling open_tree() with the OPEN_TREE_CLONE flag
and it must not already have been visible in the filesystem.
The last two points guarantee easier semantics for userspace and the
kernel and make the implementation significantly simpler.
By default vfsmounts are marked with the initial user namespace and no
behavioral or performance changes are observed.
The manpage with a detailed description can be found here:
1d7b902e28
In order to support idmapped mounts, filesystems need to be changed
and mark themselves with the FS_ALLOW_IDMAP flag in fs_flags. The
patches to convert individual filesystem are not very large or
complicated overall as can be seen from the included fat, ext4, and
xfs ports. Patches for other filesystems are actively worked on and
will be sent out separately. The xfstestsuite can be used to verify
that port has been done correctly.
The mount_setattr() syscall is motivated independent of the idmapped
mounts patches and it's been around since July 2019. One of the most
valuable features of the new mount api is the ability to perform
mounts based on file descriptors only.
Together with the lookup restrictions available in the openat2()
RESOLVE_* flag namespace which we added in v5.6 this is the first time
we are close to hardened and race-free (e.g. symlinks) mounting and
path resolution.
While userspace has started porting to the new mount api to mount
proper filesystems and create new bind-mounts it is currently not
possible to change mount options of an already existing bind mount in
the new mount api since the mount_setattr() syscall is missing.
With the addition of the mount_setattr() syscall we remove this last
restriction and userspace can now fully port to the new mount api,
covering every use-case the old mount api could. We also add the
crucial ability to recursively change mount options for a whole mount
tree, both removing and adding mount options at the same time. This
syscall has been requested multiple times by various people and
projects.
There is a simple tool available at
https://github.com/brauner/mount-idmapped
that allows to create idmapped mounts so people can play with this
patch series. I'll add support for the regular mount binary should you
decide to pull this in the following weeks:
Here's an example to a simple idmapped mount of another user's home
directory:
u1001@f2-vm:/$ sudo ./mount --idmap both:1000:1001:1 /home/ubuntu/ /mnt
u1001@f2-vm:/$ ls -al /home/ubuntu/
total 28
drwxr-xr-x 2 ubuntu ubuntu 4096 Oct 28 22:07 .
drwxr-xr-x 4 root root 4096 Oct 28 04:00 ..
-rw------- 1 ubuntu ubuntu 3154 Oct 28 22:12 .bash_history
-rw-r--r-- 1 ubuntu ubuntu 220 Feb 25 2020 .bash_logout
-rw-r--r-- 1 ubuntu ubuntu 3771 Feb 25 2020 .bashrc
-rw-r--r-- 1 ubuntu ubuntu 807 Feb 25 2020 .profile
-rw-r--r-- 1 ubuntu ubuntu 0 Oct 16 16:11 .sudo_as_admin_successful
-rw------- 1 ubuntu ubuntu 1144 Oct 28 00:43 .viminfo
u1001@f2-vm:/$ ls -al /mnt/
total 28
drwxr-xr-x 2 u1001 u1001 4096 Oct 28 22:07 .
drwxr-xr-x 29 root root 4096 Oct 28 22:01 ..
-rw------- 1 u1001 u1001 3154 Oct 28 22:12 .bash_history
-rw-r--r-- 1 u1001 u1001 220 Feb 25 2020 .bash_logout
-rw-r--r-- 1 u1001 u1001 3771 Feb 25 2020 .bashrc
-rw-r--r-- 1 u1001 u1001 807 Feb 25 2020 .profile
-rw-r--r-- 1 u1001 u1001 0 Oct 16 16:11 .sudo_as_admin_successful
-rw------- 1 u1001 u1001 1144 Oct 28 00:43 .viminfo
u1001@f2-vm:/$ touch /mnt/my-file
u1001@f2-vm:/$ setfacl -m u:1001:rwx /mnt/my-file
u1001@f2-vm:/$ sudo setcap -n 1001 cap_net_raw+ep /mnt/my-file
u1001@f2-vm:/$ ls -al /mnt/my-file
-rw-rwxr--+ 1 u1001 u1001 0 Oct 28 22:14 /mnt/my-file
u1001@f2-vm:/$ ls -al /home/ubuntu/my-file
-rw-rwxr--+ 1 ubuntu ubuntu 0 Oct 28 22:14 /home/ubuntu/my-file
u1001@f2-vm:/$ getfacl /mnt/my-file
getfacl: Removing leading '/' from absolute path names
# file: mnt/my-file
# owner: u1001
# group: u1001
user::rw-
user:u1001:rwx
group::rw-
mask::rwx
other::r--
u1001@f2-vm:/$ getfacl /home/ubuntu/my-file
getfacl: Removing leading '/' from absolute path names
# file: home/ubuntu/my-file
# owner: ubuntu
# group: ubuntu
user::rw-
user:ubuntu:rwx
group::rw-
mask::rwx
other::r--"
* tag 'idmapped-mounts-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: (41 commits)
xfs: remove the possibly unused mp variable in xfs_file_compat_ioctl
xfs: support idmapped mounts
ext4: support idmapped mounts
fat: handle idmapped mounts
tests: add mount_setattr() selftests
fs: introduce MOUNT_ATTR_IDMAP
fs: add mount_setattr()
fs: add attr_flags_to_mnt_flags helper
fs: split out functions to hold writers
namespace: only take read lock in do_reconfigure_mnt()
mount: make {lock,unlock}_mount_hash() static
namespace: take lock_mount_hash() directly when changing flags
nfs: do not export idmapped mounts
overlayfs: do not mount on top of idmapped mounts
ecryptfs: do not mount on top of idmapped mounts
ima: handle idmapped mounts
apparmor: handle idmapped mounts
fs: make helpers idmap mount aware
exec: handle idmapped mounts
would_dump: handle idmapped mounts
...
1266 lines
40 KiB
C
1266 lines
40 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _FS_CEPH_SUPER_H
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#define _FS_CEPH_SUPER_H
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#include <linux/ceph/ceph_debug.h>
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#include <asm/unaligned.h>
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#include <linux/backing-dev.h>
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#include <linux/completion.h>
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#include <linux/exportfs.h>
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#include <linux/fs.h>
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#include <linux/mempool.h>
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#include <linux/pagemap.h>
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#include <linux/wait.h>
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#include <linux/writeback.h>
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#include <linux/slab.h>
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#include <linux/posix_acl.h>
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#include <linux/refcount.h>
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#include <linux/security.h>
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#include <linux/ceph/libceph.h>
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#ifdef CONFIG_CEPH_FSCACHE
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#include <linux/fscache.h>
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#endif
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/* f_type in struct statfs */
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#define CEPH_SUPER_MAGIC 0x00c36400
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/* large granularity for statfs utilization stats to facilitate
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* large volume sizes on 32-bit machines. */
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#define CEPH_BLOCK_SHIFT 22 /* 4 MB */
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#define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
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#define CEPH_MOUNT_OPT_CLEANRECOVER (1<<1) /* auto reonnect (clean mode) after blocklisted */
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#define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */
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#define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
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#define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
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#define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */
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#define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */
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#define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */
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#define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */
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#define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */
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#define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */
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#define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14) /* don't use RADOS 'copy-from' op */
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#define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */
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#define CEPH_MOUNT_OPT_DEFAULT \
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(CEPH_MOUNT_OPT_DCACHE | \
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CEPH_MOUNT_OPT_NOCOPYFROM)
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#define ceph_set_mount_opt(fsc, opt) \
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(fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt
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#define ceph_clear_mount_opt(fsc, opt) \
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(fsc)->mount_options->flags &= ~CEPH_MOUNT_OPT_##opt
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#define ceph_test_mount_opt(fsc, opt) \
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(!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
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/* max size of osd read request, limited by libceph */
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#define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN
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/* osd has a configurable limitaion of max write size.
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* CEPH_MSG_MAX_DATA_LEN should be small enough. */
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#define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN
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#define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */
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#define CEPH_MAX_READDIR_DEFAULT 1024
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#define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
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#define CEPH_SNAPDIRNAME_DEFAULT ".snap"
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/*
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* Delay telling the MDS we no longer want caps, in case we reopen
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* the file. Delay a minimum amount of time, even if we send a cap
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* message for some other reason. Otherwise, take the oppotunity to
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* update the mds to avoid sending another message later.
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*/
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#define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */
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#define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
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struct ceph_mount_options {
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unsigned int flags;
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unsigned int wsize; /* max write size */
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unsigned int rsize; /* max read size */
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unsigned int rasize; /* max readahead */
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unsigned int congestion_kb; /* max writeback in flight */
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unsigned int caps_wanted_delay_min, caps_wanted_delay_max;
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int caps_max;
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unsigned int max_readdir; /* max readdir result (entries) */
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unsigned int max_readdir_bytes; /* max readdir result (bytes) */
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/*
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* everything above this point can be memcmp'd; everything below
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* is handled in compare_mount_options()
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*/
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char *snapdir_name; /* default ".snap" */
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char *mds_namespace; /* default NULL */
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char *server_path; /* default NULL (means "/") */
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char *fscache_uniq; /* default NULL */
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};
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struct ceph_fs_client {
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struct super_block *sb;
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struct list_head metric_wakeup;
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struct ceph_mount_options *mount_options;
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struct ceph_client *client;
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int mount_state;
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bool blocklisted;
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bool have_copy_from2;
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u32 filp_gen;
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loff_t max_file_size;
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struct ceph_mds_client *mdsc;
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atomic_long_t writeback_count;
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struct workqueue_struct *inode_wq;
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struct workqueue_struct *cap_wq;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_dentry_lru, *debugfs_caps;
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struct dentry *debugfs_congestion_kb;
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struct dentry *debugfs_bdi;
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struct dentry *debugfs_mdsc, *debugfs_mdsmap;
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struct dentry *debugfs_metric;
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struct dentry *debugfs_status;
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struct dentry *debugfs_mds_sessions;
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#endif
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#ifdef CONFIG_CEPH_FSCACHE
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struct fscache_cookie *fscache;
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#endif
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};
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/*
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* File i/o capability. This tracks shared state with the metadata
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* server that allows us to cache or writeback attributes or to read
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* and write data. For any given inode, we should have one or more
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* capabilities, one issued by each metadata server, and our
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* cumulative access is the OR of all issued capabilities.
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*
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* Each cap is referenced by the inode's i_caps rbtree and by per-mds
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* session capability lists.
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*/
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struct ceph_cap {
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struct ceph_inode_info *ci;
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struct rb_node ci_node; /* per-ci cap tree */
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struct ceph_mds_session *session;
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struct list_head session_caps; /* per-session caplist */
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u64 cap_id; /* unique cap id (mds provided) */
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union {
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/* in-use caps */
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struct {
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int issued; /* latest, from the mds */
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int implemented; /* implemented superset of
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issued (for revocation) */
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int mds; /* mds index for this cap */
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int mds_wanted; /* caps wanted from this mds */
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};
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/* caps to release */
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struct {
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u64 cap_ino;
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int queue_release;
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};
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};
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u32 seq, issue_seq, mseq;
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u32 cap_gen; /* active/stale cycle */
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unsigned long last_used;
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struct list_head caps_item;
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};
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#define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */
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#define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */
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#define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */
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struct ceph_cap_flush {
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u64 tid;
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int caps; /* 0 means capsnap */
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bool wake; /* wake up flush waiters when finish ? */
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struct list_head g_list; // global
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struct list_head i_list; // per inode
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};
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/*
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* Snapped cap state that is pending flush to mds. When a snapshot occurs,
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* we first complete any in-process sync writes and writeback any dirty
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* data before flushing the snapped state (tracked here) back to the MDS.
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*/
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struct ceph_cap_snap {
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refcount_t nref;
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struct list_head ci_item;
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struct ceph_cap_flush cap_flush;
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u64 follows;
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int issued, dirty;
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struct ceph_snap_context *context;
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umode_t mode;
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kuid_t uid;
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kgid_t gid;
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struct ceph_buffer *xattr_blob;
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u64 xattr_version;
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u64 size;
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u64 change_attr;
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struct timespec64 mtime, atime, ctime, btime;
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u64 time_warp_seq;
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u64 truncate_size;
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u32 truncate_seq;
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int writing; /* a sync write is still in progress */
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int dirty_pages; /* dirty pages awaiting writeback */
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bool inline_data;
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bool need_flush;
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};
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static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
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{
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if (refcount_dec_and_test(&capsnap->nref)) {
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if (capsnap->xattr_blob)
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ceph_buffer_put(capsnap->xattr_blob);
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kfree(capsnap);
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}
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}
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/*
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* The frag tree describes how a directory is fragmented, potentially across
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* multiple metadata servers. It is also used to indicate points where
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* metadata authority is delegated, and whether/where metadata is replicated.
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*
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* A _leaf_ frag will be present in the i_fragtree IFF there is
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* delegation info. That is, if mds >= 0 || ndist > 0.
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*/
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#define CEPH_MAX_DIRFRAG_REP 4
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struct ceph_inode_frag {
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struct rb_node node;
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/* fragtree state */
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u32 frag;
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int split_by; /* i.e. 2^(split_by) children */
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/* delegation and replication info */
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int mds; /* -1 if same authority as parent */
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int ndist; /* >0 if replicated */
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int dist[CEPH_MAX_DIRFRAG_REP];
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};
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/*
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* We cache inode xattrs as an encoded blob until they are first used,
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* at which point we parse them into an rbtree.
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*/
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struct ceph_inode_xattr {
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struct rb_node node;
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const char *name;
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int name_len;
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const char *val;
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int val_len;
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int dirty;
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int should_free_name;
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int should_free_val;
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};
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/*
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* Ceph dentry state
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*/
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struct ceph_dentry_info {
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struct dentry *dentry;
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struct ceph_mds_session *lease_session;
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struct list_head lease_list;
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unsigned flags;
|
|
int lease_shared_gen;
|
|
u32 lease_gen;
|
|
u32 lease_seq;
|
|
unsigned long lease_renew_after, lease_renew_from;
|
|
unsigned long time;
|
|
u64 offset;
|
|
};
|
|
|
|
#define CEPH_DENTRY_REFERENCED 1
|
|
#define CEPH_DENTRY_LEASE_LIST 2
|
|
#define CEPH_DENTRY_SHRINK_LIST 4
|
|
#define CEPH_DENTRY_PRIMARY_LINK 8
|
|
|
|
struct ceph_inode_xattrs_info {
|
|
/*
|
|
* (still encoded) xattr blob. we avoid the overhead of parsing
|
|
* this until someone actually calls getxattr, etc.
|
|
*
|
|
* blob->vec.iov_len == 4 implies there are no xattrs; blob ==
|
|
* NULL means we don't know.
|
|
*/
|
|
struct ceph_buffer *blob, *prealloc_blob;
|
|
|
|
struct rb_root index;
|
|
bool dirty;
|
|
int count;
|
|
int names_size;
|
|
int vals_size;
|
|
u64 version, index_version;
|
|
};
|
|
|
|
/*
|
|
* Ceph inode.
|
|
*/
|
|
struct ceph_inode_info {
|
|
struct ceph_vino i_vino; /* ceph ino + snap */
|
|
|
|
spinlock_t i_ceph_lock;
|
|
|
|
u64 i_version;
|
|
u64 i_inline_version;
|
|
u32 i_time_warp_seq;
|
|
|
|
unsigned long i_ceph_flags;
|
|
atomic64_t i_release_count;
|
|
atomic64_t i_ordered_count;
|
|
atomic64_t i_complete_seq[2];
|
|
|
|
struct ceph_dir_layout i_dir_layout;
|
|
struct ceph_file_layout i_layout;
|
|
struct ceph_file_layout i_cached_layout; // for async creates
|
|
char *i_symlink;
|
|
|
|
/* for dirs */
|
|
struct timespec64 i_rctime;
|
|
u64 i_rbytes, i_rfiles, i_rsubdirs;
|
|
u64 i_files, i_subdirs;
|
|
|
|
/* quotas */
|
|
u64 i_max_bytes, i_max_files;
|
|
|
|
s32 i_dir_pin;
|
|
|
|
struct rb_root i_fragtree;
|
|
int i_fragtree_nsplits;
|
|
struct mutex i_fragtree_mutex;
|
|
|
|
struct ceph_inode_xattrs_info i_xattrs;
|
|
|
|
/* capabilities. protected _both_ by i_ceph_lock and cap->session's
|
|
* s_mutex. */
|
|
struct rb_root i_caps; /* cap list */
|
|
struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
|
|
unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
|
|
|
|
/*
|
|
* Link to the auth cap's session's s_cap_dirty list. s_cap_dirty
|
|
* is protected by the mdsc->cap_dirty_lock, but each individual item
|
|
* is also protected by the inode's i_ceph_lock. Walking s_cap_dirty
|
|
* requires the mdsc->cap_dirty_lock. List presence for an item can
|
|
* be tested under the i_ceph_lock. Changing anything requires both.
|
|
*/
|
|
struct list_head i_dirty_item;
|
|
|
|
/*
|
|
* Link to session's s_cap_flushing list. Protected in a similar
|
|
* fashion to i_dirty_item, but also by the s_mutex for changes. The
|
|
* s_cap_flushing list can be walked while holding either the s_mutex
|
|
* or msdc->cap_dirty_lock. List presence can also be checked while
|
|
* holding the i_ceph_lock for this inode.
|
|
*/
|
|
struct list_head i_flushing_item;
|
|
|
|
/* we need to track cap writeback on a per-cap-bit basis, to allow
|
|
* overlapping, pipelined cap flushes to the mds. we can probably
|
|
* reduce the tid to 8 bits if we're concerned about inode size. */
|
|
struct ceph_cap_flush *i_prealloc_cap_flush;
|
|
struct list_head i_cap_flush_list;
|
|
wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
|
|
unsigned long i_hold_caps_max; /* jiffies */
|
|
struct list_head i_cap_delay_list; /* for delayed cap release to mds */
|
|
struct ceph_cap_reservation i_cap_migration_resv;
|
|
struct list_head i_cap_snaps; /* snapped state pending flush to mds */
|
|
struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
|
|
dirty|flushing caps */
|
|
unsigned i_snap_caps; /* cap bits for snapped files */
|
|
|
|
unsigned long i_last_rd;
|
|
unsigned long i_last_wr;
|
|
int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */
|
|
|
|
struct mutex i_truncate_mutex;
|
|
u32 i_truncate_seq; /* last truncate to smaller size */
|
|
u64 i_truncate_size; /* and the size we last truncated down to */
|
|
int i_truncate_pending; /* still need to call vmtruncate */
|
|
|
|
u64 i_max_size; /* max file size authorized by mds */
|
|
u64 i_reported_size; /* (max_)size reported to or requested of mds */
|
|
u64 i_wanted_max_size; /* offset we'd like to write too */
|
|
u64 i_requested_max_size; /* max_size we've requested */
|
|
|
|
/* held references to caps */
|
|
int i_pin_ref;
|
|
int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref;
|
|
int i_wrbuffer_ref, i_wrbuffer_ref_head;
|
|
atomic_t i_filelock_ref;
|
|
atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */
|
|
u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */
|
|
u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
|
|
|
|
struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
|
|
struct list_head i_unsafe_iops; /* uncommitted mds inode ops */
|
|
spinlock_t i_unsafe_lock;
|
|
|
|
union {
|
|
struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
|
|
struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */
|
|
};
|
|
int i_snap_realm_counter; /* snap realm (if caps) */
|
|
struct list_head i_snap_realm_item;
|
|
struct list_head i_snap_flush_item;
|
|
struct timespec64 i_btime;
|
|
struct timespec64 i_snap_btime;
|
|
|
|
struct work_struct i_work;
|
|
unsigned long i_work_mask;
|
|
|
|
#ifdef CONFIG_CEPH_FSCACHE
|
|
struct fscache_cookie *fscache;
|
|
u32 i_fscache_gen;
|
|
#endif
|
|
errseq_t i_meta_err;
|
|
|
|
struct inode vfs_inode; /* at end */
|
|
};
|
|
|
|
static inline struct ceph_inode_info *
|
|
ceph_inode(const struct inode *inode)
|
|
{
|
|
return container_of(inode, struct ceph_inode_info, vfs_inode);
|
|
}
|
|
|
|
static inline struct ceph_fs_client *
|
|
ceph_inode_to_client(const struct inode *inode)
|
|
{
|
|
return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
|
|
}
|
|
|
|
static inline struct ceph_fs_client *
|
|
ceph_sb_to_client(const struct super_block *sb)
|
|
{
|
|
return (struct ceph_fs_client *)sb->s_fs_info;
|
|
}
|
|
|
|
static inline struct ceph_mds_client *
|
|
ceph_sb_to_mdsc(const struct super_block *sb)
|
|
{
|
|
return (struct ceph_mds_client *)ceph_sb_to_client(sb)->mdsc;
|
|
}
|
|
|
|
static inline struct ceph_vino
|
|
ceph_vino(const struct inode *inode)
|
|
{
|
|
return ceph_inode(inode)->i_vino;
|
|
}
|
|
|
|
static inline u32 ceph_ino_to_ino32(u64 vino)
|
|
{
|
|
u32 ino = vino & 0xffffffff;
|
|
ino ^= vino >> 32;
|
|
if (!ino)
|
|
ino = 2;
|
|
return ino;
|
|
}
|
|
|
|
/*
|
|
* Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on
|
|
* some arches. We generally do not use this value inside the ceph driver, but
|
|
* we do want to set it to something, so that generic vfs code has an
|
|
* appropriate value for tracepoints and the like.
|
|
*/
|
|
static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino)
|
|
{
|
|
if (sizeof(ino_t) == sizeof(u32))
|
|
return ceph_ino_to_ino32(vino.ino);
|
|
return (ino_t)vino.ino;
|
|
}
|
|
|
|
/* for printf-style formatting */
|
|
#define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
|
|
|
|
static inline u64 ceph_ino(struct inode *inode)
|
|
{
|
|
return ceph_inode(inode)->i_vino.ino;
|
|
}
|
|
|
|
static inline u64 ceph_snap(struct inode *inode)
|
|
{
|
|
return ceph_inode(inode)->i_vino.snap;
|
|
}
|
|
|
|
/**
|
|
* ceph_present_ino - format an inode number for presentation to userland
|
|
* @sb: superblock where the inode lives
|
|
* @ino: inode number to (possibly) convert
|
|
*
|
|
* If the user mounted with the ino32 option, then the 64-bit value needs
|
|
* to be converted to something that can fit inside 32 bits. Note that
|
|
* internal kernel code never uses this value, so this is entirely for
|
|
* userland consumption.
|
|
*/
|
|
static inline u64 ceph_present_ino(struct super_block *sb, u64 ino)
|
|
{
|
|
if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32)))
|
|
return ceph_ino_to_ino32(ino);
|
|
return ino;
|
|
}
|
|
|
|
static inline u64 ceph_present_inode(struct inode *inode)
|
|
{
|
|
return ceph_present_ino(inode->i_sb, ceph_ino(inode));
|
|
}
|
|
|
|
static inline int ceph_ino_compare(struct inode *inode, void *data)
|
|
{
|
|
struct ceph_vino *pvino = (struct ceph_vino *)data;
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
return ci->i_vino.ino == pvino->ino &&
|
|
ci->i_vino.snap == pvino->snap;
|
|
}
|
|
|
|
|
|
static inline struct inode *ceph_find_inode(struct super_block *sb,
|
|
struct ceph_vino vino)
|
|
{
|
|
/*
|
|
* NB: The hashval will be run through the fs/inode.c hash function
|
|
* anyway, so there is no need to squash the inode number down to
|
|
* 32-bits first. Just use low-order bits on arches with 32-bit long.
|
|
*/
|
|
return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino);
|
|
}
|
|
|
|
|
|
/*
|
|
* Ceph inode.
|
|
*/
|
|
#define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */
|
|
#define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */
|
|
#define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */
|
|
#define CEPH_I_POOL_RD (1 << 4) /* can read from pool */
|
|
#define CEPH_I_POOL_WR (1 << 5) /* can write to pool */
|
|
#define CEPH_I_SEC_INITED (1 << 6) /* security initialized */
|
|
#define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */
|
|
#define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */
|
|
#define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */
|
|
#define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */
|
|
#define CEPH_I_ODIRECT (1 << 11) /* inode in direct I/O mode */
|
|
#define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */
|
|
#define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT)
|
|
|
|
/*
|
|
* Masks of ceph inode work.
|
|
*/
|
|
#define CEPH_I_WORK_WRITEBACK 0
|
|
#define CEPH_I_WORK_INVALIDATE_PAGES 1
|
|
#define CEPH_I_WORK_VMTRUNCATE 2
|
|
#define CEPH_I_WORK_CHECK_CAPS 3
|
|
#define CEPH_I_WORK_FLUSH_SNAPS 4
|
|
|
|
/*
|
|
* We set the ERROR_WRITE bit when we start seeing write errors on an inode
|
|
* and then clear it when they start succeeding. Note that we do a lockless
|
|
* check first, and only take the lock if it looks like it needs to be changed.
|
|
* The write submission code just takes this as a hint, so we're not too
|
|
* worried if a few slip through in either direction.
|
|
*/
|
|
static inline void ceph_set_error_write(struct ceph_inode_info *ci)
|
|
{
|
|
if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) {
|
|
spin_lock(&ci->i_ceph_lock);
|
|
ci->i_ceph_flags |= CEPH_I_ERROR_WRITE;
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
}
|
|
}
|
|
|
|
static inline void ceph_clear_error_write(struct ceph_inode_info *ci)
|
|
{
|
|
if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) {
|
|
spin_lock(&ci->i_ceph_lock);
|
|
ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE;
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
}
|
|
}
|
|
|
|
static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
|
|
long long release_count,
|
|
long long ordered_count)
|
|
{
|
|
/*
|
|
* Makes sure operations that setup readdir cache (update page
|
|
* cache and i_size) are strongly ordered w.r.t. the following
|
|
* atomic64_set() operations.
|
|
*/
|
|
smp_mb();
|
|
atomic64_set(&ci->i_complete_seq[0], release_count);
|
|
atomic64_set(&ci->i_complete_seq[1], ordered_count);
|
|
}
|
|
|
|
static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
|
|
{
|
|
atomic64_inc(&ci->i_release_count);
|
|
}
|
|
|
|
static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci)
|
|
{
|
|
atomic64_inc(&ci->i_ordered_count);
|
|
}
|
|
|
|
static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
|
|
{
|
|
return atomic64_read(&ci->i_complete_seq[0]) ==
|
|
atomic64_read(&ci->i_release_count);
|
|
}
|
|
|
|
static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
|
|
{
|
|
return atomic64_read(&ci->i_complete_seq[0]) ==
|
|
atomic64_read(&ci->i_release_count) &&
|
|
atomic64_read(&ci->i_complete_seq[1]) ==
|
|
atomic64_read(&ci->i_ordered_count);
|
|
}
|
|
|
|
static inline void ceph_dir_clear_complete(struct inode *inode)
|
|
{
|
|
__ceph_dir_clear_complete(ceph_inode(inode));
|
|
}
|
|
|
|
static inline void ceph_dir_clear_ordered(struct inode *inode)
|
|
{
|
|
__ceph_dir_clear_ordered(ceph_inode(inode));
|
|
}
|
|
|
|
static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
|
|
{
|
|
bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode));
|
|
smp_rmb();
|
|
return ret;
|
|
}
|
|
|
|
/* find a specific frag @f */
|
|
extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
|
|
u32 f);
|
|
|
|
/*
|
|
* choose fragment for value @v. copy frag content to pfrag, if leaf
|
|
* exists
|
|
*/
|
|
extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
|
|
struct ceph_inode_frag *pfrag,
|
|
int *found);
|
|
|
|
static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry)
|
|
{
|
|
return (struct ceph_dentry_info *)dentry->d_fsdata;
|
|
}
|
|
|
|
/*
|
|
* caps helpers
|
|
*/
|
|
static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
|
|
{
|
|
return !RB_EMPTY_ROOT(&ci->i_caps);
|
|
}
|
|
|
|
extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
|
|
extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
|
|
extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask,
|
|
int t);
|
|
extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
|
|
struct ceph_cap *cap);
|
|
|
|
static inline int ceph_caps_issued(struct ceph_inode_info *ci)
|
|
{
|
|
int issued;
|
|
spin_lock(&ci->i_ceph_lock);
|
|
issued = __ceph_caps_issued(ci, NULL);
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
return issued;
|
|
}
|
|
|
|
static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci,
|
|
int mask, int touch)
|
|
{
|
|
int r;
|
|
spin_lock(&ci->i_ceph_lock);
|
|
r = __ceph_caps_issued_mask_metric(ci, mask, touch);
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
return r;
|
|
}
|
|
|
|
static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
|
|
{
|
|
return ci->i_dirty_caps | ci->i_flushing_caps;
|
|
}
|
|
extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
|
|
extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
|
|
extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
|
|
struct ceph_cap_flush **pcf);
|
|
|
|
extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
|
|
struct ceph_cap *ocap, int mask);
|
|
extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
|
|
extern int __ceph_caps_used(struct ceph_inode_info *ci);
|
|
|
|
static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci)
|
|
{
|
|
return ci->i_nr_by_mode[0];
|
|
}
|
|
extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
|
|
extern int __ceph_caps_wanted(struct ceph_inode_info *ci);
|
|
|
|
/* what the mds thinks we want */
|
|
extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);
|
|
|
|
extern void ceph_caps_init(struct ceph_mds_client *mdsc);
|
|
extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
|
|
extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc,
|
|
struct ceph_mount_options *fsopt);
|
|
extern int ceph_reserve_caps(struct ceph_mds_client *mdsc,
|
|
struct ceph_cap_reservation *ctx, int need);
|
|
extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
|
|
struct ceph_cap_reservation *ctx);
|
|
extern void ceph_reservation_status(struct ceph_fs_client *client,
|
|
int *total, int *avail, int *used,
|
|
int *reserved, int *min);
|
|
|
|
|
|
|
|
/*
|
|
* we keep buffered readdir results attached to file->private_data
|
|
*/
|
|
#define CEPH_F_SYNC 1
|
|
#define CEPH_F_ATEND 2
|
|
|
|
struct ceph_file_info {
|
|
short fmode; /* initialized on open */
|
|
short flags; /* CEPH_F_* */
|
|
|
|
spinlock_t rw_contexts_lock;
|
|
struct list_head rw_contexts;
|
|
|
|
errseq_t meta_err;
|
|
u32 filp_gen;
|
|
atomic_t num_locks;
|
|
};
|
|
|
|
struct ceph_dir_file_info {
|
|
struct ceph_file_info file_info;
|
|
|
|
/* readdir: position within the dir */
|
|
u32 frag;
|
|
struct ceph_mds_request *last_readdir;
|
|
|
|
/* readdir: position within a frag */
|
|
unsigned next_offset; /* offset of next chunk (last_name's + 1) */
|
|
char *last_name; /* last entry in previous chunk */
|
|
long long dir_release_count;
|
|
long long dir_ordered_count;
|
|
int readdir_cache_idx;
|
|
|
|
/* used for -o dirstat read() on directory thing */
|
|
char *dir_info;
|
|
int dir_info_len;
|
|
};
|
|
|
|
struct ceph_rw_context {
|
|
struct list_head list;
|
|
struct task_struct *thread;
|
|
int caps;
|
|
};
|
|
|
|
#define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \
|
|
struct ceph_rw_context _name = { \
|
|
.thread = current, \
|
|
.caps = _caps, \
|
|
}
|
|
|
|
static inline void ceph_add_rw_context(struct ceph_file_info *cf,
|
|
struct ceph_rw_context *ctx)
|
|
{
|
|
spin_lock(&cf->rw_contexts_lock);
|
|
list_add(&ctx->list, &cf->rw_contexts);
|
|
spin_unlock(&cf->rw_contexts_lock);
|
|
}
|
|
|
|
static inline void ceph_del_rw_context(struct ceph_file_info *cf,
|
|
struct ceph_rw_context *ctx)
|
|
{
|
|
spin_lock(&cf->rw_contexts_lock);
|
|
list_del(&ctx->list);
|
|
spin_unlock(&cf->rw_contexts_lock);
|
|
}
|
|
|
|
static inline struct ceph_rw_context*
|
|
ceph_find_rw_context(struct ceph_file_info *cf)
|
|
{
|
|
struct ceph_rw_context *ctx, *found = NULL;
|
|
spin_lock(&cf->rw_contexts_lock);
|
|
list_for_each_entry(ctx, &cf->rw_contexts, list) {
|
|
if (ctx->thread == current) {
|
|
found = ctx;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock(&cf->rw_contexts_lock);
|
|
return found;
|
|
}
|
|
|
|
struct ceph_readdir_cache_control {
|
|
struct page *page;
|
|
struct dentry **dentries;
|
|
int index;
|
|
};
|
|
|
|
/*
|
|
* A "snap realm" describes a subset of the file hierarchy sharing
|
|
* the same set of snapshots that apply to it. The realms themselves
|
|
* are organized into a hierarchy, such that children inherit (some of)
|
|
* the snapshots of their parents.
|
|
*
|
|
* All inodes within the realm that have capabilities are linked into a
|
|
* per-realm list.
|
|
*/
|
|
struct ceph_snap_realm {
|
|
u64 ino;
|
|
struct inode *inode;
|
|
atomic_t nref;
|
|
struct rb_node node;
|
|
|
|
u64 created, seq;
|
|
u64 parent_ino;
|
|
u64 parent_since; /* snapid when our current parent became so */
|
|
|
|
u64 *prior_parent_snaps; /* snaps inherited from any parents we */
|
|
u32 num_prior_parent_snaps; /* had prior to parent_since */
|
|
u64 *snaps; /* snaps specific to this realm */
|
|
u32 num_snaps;
|
|
|
|
struct ceph_snap_realm *parent;
|
|
struct list_head children; /* list of child realms */
|
|
struct list_head child_item;
|
|
|
|
struct list_head empty_item; /* if i have ref==0 */
|
|
|
|
struct list_head dirty_item; /* if realm needs new context */
|
|
|
|
/* the current set of snaps for this realm */
|
|
struct ceph_snap_context *cached_context;
|
|
|
|
struct list_head inodes_with_caps;
|
|
spinlock_t inodes_with_caps_lock;
|
|
};
|
|
|
|
static inline int default_congestion_kb(void)
|
|
{
|
|
int congestion_kb;
|
|
|
|
/*
|
|
* Copied from NFS
|
|
*
|
|
* congestion size, scale with available memory.
|
|
*
|
|
* 64MB: 8192k
|
|
* 128MB: 11585k
|
|
* 256MB: 16384k
|
|
* 512MB: 23170k
|
|
* 1GB: 32768k
|
|
* 2GB: 46340k
|
|
* 4GB: 65536k
|
|
* 8GB: 92681k
|
|
* 16GB: 131072k
|
|
*
|
|
* This allows larger machines to have larger/more transfers.
|
|
* Limit the default to 256M
|
|
*/
|
|
congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10);
|
|
if (congestion_kb > 256*1024)
|
|
congestion_kb = 256*1024;
|
|
|
|
return congestion_kb;
|
|
}
|
|
|
|
|
|
/* super.c */
|
|
extern int ceph_force_reconnect(struct super_block *sb);
|
|
/* snap.c */
|
|
struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
|
|
u64 ino);
|
|
extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
|
|
struct ceph_snap_realm *realm);
|
|
extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
|
|
struct ceph_snap_realm *realm);
|
|
extern int ceph_update_snap_trace(struct ceph_mds_client *m,
|
|
void *p, void *e, bool deletion,
|
|
struct ceph_snap_realm **realm_ret);
|
|
extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_session *session,
|
|
struct ceph_msg *msg);
|
|
extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
|
|
extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
|
|
struct ceph_cap_snap *capsnap);
|
|
extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
|
|
|
|
extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc,
|
|
u64 snap);
|
|
extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc,
|
|
struct ceph_snapid_map *sm);
|
|
extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc);
|
|
extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc);
|
|
|
|
|
|
/*
|
|
* a cap_snap is "pending" if it is still awaiting an in-progress
|
|
* sync write (that may/may not still update size, mtime, etc.).
|
|
*/
|
|
static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
|
|
{
|
|
return !list_empty(&ci->i_cap_snaps) &&
|
|
list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap,
|
|
ci_item)->writing;
|
|
}
|
|
|
|
/* inode.c */
|
|
struct ceph_mds_reply_info_in;
|
|
struct ceph_mds_reply_dirfrag;
|
|
|
|
extern const struct inode_operations ceph_file_iops;
|
|
|
|
extern struct inode *ceph_alloc_inode(struct super_block *sb);
|
|
extern void ceph_evict_inode(struct inode *inode);
|
|
extern void ceph_free_inode(struct inode *inode);
|
|
|
|
extern struct inode *ceph_get_inode(struct super_block *sb,
|
|
struct ceph_vino vino);
|
|
extern struct inode *ceph_get_snapdir(struct inode *parent);
|
|
extern int ceph_fill_file_size(struct inode *inode, int issued,
|
|
u32 truncate_seq, u64 truncate_size, u64 size);
|
|
extern void ceph_fill_file_time(struct inode *inode, int issued,
|
|
u64 time_warp_seq, struct timespec64 *ctime,
|
|
struct timespec64 *mtime,
|
|
struct timespec64 *atime);
|
|
extern int ceph_fill_inode(struct inode *inode, struct page *locked_page,
|
|
struct ceph_mds_reply_info_in *iinfo,
|
|
struct ceph_mds_reply_dirfrag *dirinfo,
|
|
struct ceph_mds_session *session, int cap_fmode,
|
|
struct ceph_cap_reservation *caps_reservation);
|
|
extern int ceph_fill_trace(struct super_block *sb,
|
|
struct ceph_mds_request *req);
|
|
extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
|
|
struct ceph_mds_session *session);
|
|
|
|
extern int ceph_inode_holds_cap(struct inode *inode, int mask);
|
|
|
|
extern bool ceph_inode_set_size(struct inode *inode, loff_t size);
|
|
extern void __ceph_do_pending_vmtruncate(struct inode *inode);
|
|
|
|
extern void ceph_async_iput(struct inode *inode);
|
|
|
|
void ceph_queue_inode_work(struct inode *inode, int work_bit);
|
|
|
|
static inline void ceph_queue_vmtruncate(struct inode *inode)
|
|
{
|
|
ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE);
|
|
}
|
|
|
|
static inline void ceph_queue_invalidate(struct inode *inode)
|
|
{
|
|
ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES);
|
|
}
|
|
|
|
static inline void ceph_queue_writeback(struct inode *inode)
|
|
{
|
|
ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK);
|
|
}
|
|
|
|
static inline void ceph_queue_check_caps(struct inode *inode)
|
|
{
|
|
ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS);
|
|
}
|
|
|
|
static inline void ceph_queue_flush_snaps(struct inode *inode)
|
|
{
|
|
ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS);
|
|
}
|
|
|
|
extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
|
|
int mask, bool force);
|
|
static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
|
|
{
|
|
return __ceph_do_getattr(inode, NULL, mask, force);
|
|
}
|
|
extern int ceph_permission(struct user_namespace *mnt_userns,
|
|
struct inode *inode, int mask);
|
|
extern int __ceph_setattr(struct inode *inode, struct iattr *attr);
|
|
extern int ceph_setattr(struct user_namespace *mnt_userns,
|
|
struct dentry *dentry, struct iattr *attr);
|
|
extern int ceph_getattr(struct user_namespace *mnt_userns,
|
|
const struct path *path, struct kstat *stat,
|
|
u32 request_mask, unsigned int flags);
|
|
|
|
/* xattr.c */
|
|
int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int);
|
|
ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
|
|
extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
|
|
extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci);
|
|
extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
|
|
extern const struct xattr_handler *ceph_xattr_handlers[];
|
|
|
|
struct ceph_acl_sec_ctx {
|
|
#ifdef CONFIG_CEPH_FS_POSIX_ACL
|
|
void *default_acl;
|
|
void *acl;
|
|
#endif
|
|
#ifdef CONFIG_CEPH_FS_SECURITY_LABEL
|
|
void *sec_ctx;
|
|
u32 sec_ctxlen;
|
|
#endif
|
|
struct ceph_pagelist *pagelist;
|
|
};
|
|
|
|
#ifdef CONFIG_SECURITY
|
|
extern bool ceph_security_xattr_deadlock(struct inode *in);
|
|
extern bool ceph_security_xattr_wanted(struct inode *in);
|
|
#else
|
|
static inline bool ceph_security_xattr_deadlock(struct inode *in)
|
|
{
|
|
return false;
|
|
}
|
|
static inline bool ceph_security_xattr_wanted(struct inode *in)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_CEPH_FS_SECURITY_LABEL
|
|
extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
|
|
struct ceph_acl_sec_ctx *ctx);
|
|
static inline void ceph_security_invalidate_secctx(struct inode *inode)
|
|
{
|
|
security_inode_invalidate_secctx(inode);
|
|
}
|
|
#else
|
|
static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
|
|
struct ceph_acl_sec_ctx *ctx)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void ceph_security_invalidate_secctx(struct inode *inode)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx);
|
|
|
|
/* acl.c */
|
|
#ifdef CONFIG_CEPH_FS_POSIX_ACL
|
|
|
|
struct posix_acl *ceph_get_acl(struct inode *, int);
|
|
int ceph_set_acl(struct user_namespace *mnt_userns,
|
|
struct inode *inode, struct posix_acl *acl, int type);
|
|
int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
|
|
struct ceph_acl_sec_ctx *as_ctx);
|
|
void ceph_init_inode_acls(struct inode *inode,
|
|
struct ceph_acl_sec_ctx *as_ctx);
|
|
|
|
static inline void ceph_forget_all_cached_acls(struct inode *inode)
|
|
{
|
|
forget_all_cached_acls(inode);
|
|
}
|
|
|
|
#else
|
|
|
|
#define ceph_get_acl NULL
|
|
#define ceph_set_acl NULL
|
|
|
|
static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
|
|
struct ceph_acl_sec_ctx *as_ctx)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void ceph_init_inode_acls(struct inode *inode,
|
|
struct ceph_acl_sec_ctx *as_ctx)
|
|
{
|
|
}
|
|
static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void ceph_forget_all_cached_acls(struct inode *inode)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
/* caps.c */
|
|
extern const char *ceph_cap_string(int c);
|
|
extern void ceph_handle_caps(struct ceph_mds_session *session,
|
|
struct ceph_msg *msg);
|
|
extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
|
|
struct ceph_cap_reservation *ctx);
|
|
extern void ceph_add_cap(struct inode *inode,
|
|
struct ceph_mds_session *session, u64 cap_id,
|
|
unsigned issued, unsigned wanted,
|
|
unsigned cap, unsigned seq, u64 realmino, int flags,
|
|
struct ceph_cap **new_cap);
|
|
extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
|
|
extern void __ceph_remove_caps(struct ceph_inode_info *ci);
|
|
extern void ceph_put_cap(struct ceph_mds_client *mdsc,
|
|
struct ceph_cap *cap);
|
|
extern int ceph_is_any_caps(struct inode *inode);
|
|
|
|
extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
|
|
extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
|
|
int datasync);
|
|
extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_session *session);
|
|
extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_session *session);
|
|
void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session,
|
|
struct ceph_inode_info *ci);
|
|
extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
|
|
int mds);
|
|
extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps,
|
|
bool snap_rwsem_locked);
|
|
extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
|
|
extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
|
|
extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had);
|
|
extern void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info *ci,
|
|
int had);
|
|
extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
|
|
struct ceph_snap_context *snapc);
|
|
extern void ceph_flush_snaps(struct ceph_inode_info *ci,
|
|
struct ceph_mds_session **psession);
|
|
extern bool __ceph_should_report_size(struct ceph_inode_info *ci);
|
|
extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
|
|
struct ceph_mds_session *session);
|
|
extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
|
|
extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
|
|
extern int ceph_drop_caps_for_unlink(struct inode *inode);
|
|
extern int ceph_encode_inode_release(void **p, struct inode *inode,
|
|
int mds, int drop, int unless, int force);
|
|
extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
|
|
struct inode *dir,
|
|
int mds, int drop, int unless);
|
|
|
|
extern int ceph_get_caps(struct file *filp, int need, int want,
|
|
loff_t endoff, int *got, struct page **pinned_page);
|
|
extern int ceph_try_get_caps(struct inode *inode,
|
|
int need, int want, bool nonblock, int *got);
|
|
|
|
/* for counting open files by mode */
|
|
extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count);
|
|
extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count);
|
|
extern void __ceph_touch_fmode(struct ceph_inode_info *ci,
|
|
struct ceph_mds_client *mdsc, int fmode);
|
|
|
|
/* addr.c */
|
|
extern const struct address_space_operations ceph_aops;
|
|
extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
|
|
extern int ceph_uninline_data(struct file *filp, struct page *locked_page);
|
|
extern int ceph_pool_perm_check(struct inode *inode, int need);
|
|
extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
|
|
|
|
/* file.c */
|
|
extern const struct file_operations ceph_file_fops;
|
|
|
|
extern int ceph_renew_caps(struct inode *inode, int fmode);
|
|
extern int ceph_open(struct inode *inode, struct file *file);
|
|
extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
|
|
struct file *file, unsigned flags, umode_t mode);
|
|
extern int ceph_release(struct inode *inode, struct file *filp);
|
|
extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
|
|
char *data, size_t len);
|
|
|
|
/* dir.c */
|
|
extern const struct file_operations ceph_dir_fops;
|
|
extern const struct file_operations ceph_snapdir_fops;
|
|
extern const struct inode_operations ceph_dir_iops;
|
|
extern const struct inode_operations ceph_snapdir_iops;
|
|
extern const struct dentry_operations ceph_dentry_ops;
|
|
|
|
extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
|
|
extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
|
|
extern int ceph_handle_snapdir(struct ceph_mds_request *req,
|
|
struct dentry *dentry, int err);
|
|
extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
|
|
struct dentry *dentry, int err);
|
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extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di);
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extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di);
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extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
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extern int ceph_trim_dentries(struct ceph_mds_client *mdsc);
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extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
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extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
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/* ioctl.c */
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extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
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/* export.c */
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extern const struct export_operations ceph_export_ops;
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struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino);
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/* locks.c */
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extern __init void ceph_flock_init(void);
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extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
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extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
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extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
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extern int ceph_encode_locks_to_buffer(struct inode *inode,
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struct ceph_filelock *flocks,
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int num_fcntl_locks,
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int num_flock_locks);
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extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
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struct ceph_pagelist *pagelist,
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int num_fcntl_locks, int num_flock_locks);
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/* debugfs.c */
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extern void ceph_fs_debugfs_init(struct ceph_fs_client *client);
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extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
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/* quota.c */
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static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci)
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{
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return ci->i_max_files || ci->i_max_bytes;
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}
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extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc);
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static inline void __ceph_update_quota(struct ceph_inode_info *ci,
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u64 max_bytes, u64 max_files)
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{
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bool had_quota, has_quota;
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had_quota = __ceph_has_any_quota(ci);
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ci->i_max_bytes = max_bytes;
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ci->i_max_files = max_files;
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has_quota = __ceph_has_any_quota(ci);
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if (had_quota != has_quota)
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ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota);
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}
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extern void ceph_handle_quota(struct ceph_mds_client *mdsc,
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struct ceph_mds_session *session,
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struct ceph_msg *msg);
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extern bool ceph_quota_is_max_files_exceeded(struct inode *inode);
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extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new);
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extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode,
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loff_t newlen);
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extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode,
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loff_t newlen);
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extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc,
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struct kstatfs *buf);
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extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc);
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#endif /* _FS_CEPH_SUPER_H */
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