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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
- support for rbd object-map and fast-diff features (myself). This will speed up reads, discards and things like snap diffs on sparse images. - ceph.snap.btime vxattr to expose snapshot creation time (David Disseldorp). This will be used to integrate with "Restore Previous Versions" feature added in Windows 7 for folks who reexport ceph through SMB. - security xattrs for ceph (Zheng Yan). Only selinux is supported for now due to the limitations of ->dentry_init_security(). - support for MSG_ADDR2, FS_BTIME and FS_CHANGE_ATTR features (Jeff Layton). This is actually a single feature bit which was missing because of the filesystem pieces. With this in, the kernel client will finally be reported as "luminous" by "ceph features" -- it is still being reported as "jewel" even though all required Luminous features were implemented in 4.13. - stop NULL-terminating ceph vxattrs (Jeff Layton). The convention with xattrs is to not terminate and this was causing inconsistencies with ceph-fuse. - change filesystem time granularity from 1 us to 1 ns, again fixing an inconsistency with ceph-fuse (Luis Henriques). On top of this there are some additional dentry name handling and cap flushing fixes from Zheng. Finally, Jeff is formally taking over for Zheng as the filesystem maintainer. -----BEGIN PGP SIGNATURE----- iQFHBAABCAAxFiEEydHwtzie9C7TfviiSn/eOAIR84sFAl0u+X8THGlkcnlvbW92 QGdtYWlsLmNvbQAKCRBKf944AhHzi9byB/9fIxzoxtDMvixtJabuGSJRtlijDlWF GlO6yIWCXl/8v8easR2PCF75U/xv0+QFQmze8PVi8u4Xz589P247NnEuyEZ9n84i aCavARho6QLZPEL+B04NaqoHBl+ORKQTA6eKGhyKwRp/rn83z5Ubuw2tN7krHT3b kCY61FuTQGxNY2o/WKv/iLwINYr7H23hCf0WwyyKH1bp7OegiQ14Ebn1NtfS3sMx hS6h8Ya826vmUW0bCSS/9kzKYBCjksTig0HphUOHq6BoZJs++0b7GukIulRyuLfD J9Gr9HGPoDCVzdmFfpn2FSlxdmqfO9amUSagd0ftLQfFlPlrpoULi0GW =Bgxr -----END PGP SIGNATURE----- Merge tag 'ceph-for-5.3-rc1' of git://github.com/ceph/ceph-client Pull ceph updates from Ilya Dryomov: "Lots of exciting things this time! - support for rbd object-map and fast-diff features (myself). This will speed up reads, discards and things like snap diffs on sparse images. - ceph.snap.btime vxattr to expose snapshot creation time (David Disseldorp). This will be used to integrate with "Restore Previous Versions" feature added in Windows 7 for folks who reexport ceph through SMB. - security xattrs for ceph (Zheng Yan). Only selinux is supported for now due to the limitations of ->dentry_init_security(). - support for MSG_ADDR2, FS_BTIME and FS_CHANGE_ATTR features (Jeff Layton). This is actually a single feature bit which was missing because of the filesystem pieces. With this in, the kernel client will finally be reported as "luminous" by "ceph features" -- it is still being reported as "jewel" even though all required Luminous features were implemented in 4.13. - stop NULL-terminating ceph vxattrs (Jeff Layton). The convention with xattrs is to not terminate and this was causing inconsistencies with ceph-fuse. - change filesystem time granularity from 1 us to 1 ns, again fixing an inconsistency with ceph-fuse (Luis Henriques). On top of this there are some additional dentry name handling and cap flushing fixes from Zheng. Finally, Jeff is formally taking over for Zheng as the filesystem maintainer" * tag 'ceph-for-5.3-rc1' of git://github.com/ceph/ceph-client: (71 commits) ceph: fix end offset in truncate_inode_pages_range call ceph: use generic_delete_inode() for ->drop_inode ceph: use ceph_evict_inode to cleanup inode's resource ceph: initialize superblock s_time_gran to 1 MAINTAINERS: take over for Zheng as CephFS kernel client maintainer rbd: setallochint only if object doesn't exist rbd: support for object-map and fast-diff rbd: call rbd_dev_mapping_set() from rbd_dev_image_probe() libceph: export osd_req_op_data() macro libceph: change ceph_osdc_call() to take page vector for response libceph: bump CEPH_MSG_MAX_DATA_LEN (again) rbd: new exclusive lock wait/wake code rbd: quiescing lock should wait for image requests rbd: lock should be quiesced on reacquire rbd: introduce copyup state machine rbd: rename rbd_obj_setup_*() to rbd_obj_init_*() rbd: move OSD request allocation into object request state machines rbd: factor out __rbd_osd_setup_discard_ops() rbd: factor out rbd_osd_setup_copyup() rbd: introduce obj_req->osd_reqs list ...
1190 lines
28 KiB
C
1190 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/ceph/ceph_debug.h>
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#include <linux/backing-dev.h>
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#include <linux/ctype.h>
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#include <linux/fs.h>
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#include <linux/inet.h>
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#include <linux/in6.h>
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#include <linux/module.h>
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#include <linux/mount.h>
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#include <linux/parser.h>
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#include <linux/sched.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/statfs.h>
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#include <linux/string.h>
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#include "super.h"
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#include "mds_client.h"
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#include "cache.h"
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#include <linux/ceph/ceph_features.h>
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#include <linux/ceph/decode.h>
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#include <linux/ceph/mon_client.h>
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#include <linux/ceph/auth.h>
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#include <linux/ceph/debugfs.h>
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/*
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* Ceph superblock operations
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*
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* Handle the basics of mounting, unmounting.
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*/
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/*
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* super ops
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*/
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static void ceph_put_super(struct super_block *s)
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{
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struct ceph_fs_client *fsc = ceph_sb_to_client(s);
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dout("put_super\n");
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ceph_mdsc_close_sessions(fsc->mdsc);
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}
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static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
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{
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struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry));
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struct ceph_mon_client *monc = &fsc->client->monc;
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struct ceph_statfs st;
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u64 fsid;
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int err;
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u64 data_pool;
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if (fsc->mdsc->mdsmap->m_num_data_pg_pools == 1) {
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data_pool = fsc->mdsc->mdsmap->m_data_pg_pools[0];
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} else {
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data_pool = CEPH_NOPOOL;
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}
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dout("statfs\n");
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err = ceph_monc_do_statfs(monc, data_pool, &st);
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if (err < 0)
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return err;
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/* fill in kstatfs */
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buf->f_type = CEPH_SUPER_MAGIC; /* ?? */
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/*
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* express utilization in terms of large blocks to avoid
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* overflow on 32-bit machines.
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*
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* NOTE: for the time being, we make bsize == frsize to humor
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* not-yet-ancient versions of glibc that are broken.
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* Someday, we will probably want to report a real block
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* size... whatever that may mean for a network file system!
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*/
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buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
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buf->f_frsize = 1 << CEPH_BLOCK_SHIFT;
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/*
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* By default use root quota for stats; fallback to overall filesystem
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* usage if using 'noquotadf' mount option or if the root dir doesn't
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* have max_bytes quota set.
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*/
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if (ceph_test_mount_opt(fsc, NOQUOTADF) ||
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!ceph_quota_update_statfs(fsc, buf)) {
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buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
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buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
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buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
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}
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buf->f_files = le64_to_cpu(st.num_objects);
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buf->f_ffree = -1;
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buf->f_namelen = NAME_MAX;
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/* Must convert the fsid, for consistent values across arches */
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mutex_lock(&monc->mutex);
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fsid = le64_to_cpu(*(__le64 *)(&monc->monmap->fsid)) ^
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le64_to_cpu(*((__le64 *)&monc->monmap->fsid + 1));
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mutex_unlock(&monc->mutex);
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buf->f_fsid.val[0] = fsid & 0xffffffff;
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buf->f_fsid.val[1] = fsid >> 32;
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return 0;
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}
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static int ceph_sync_fs(struct super_block *sb, int wait)
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{
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struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
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if (!wait) {
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dout("sync_fs (non-blocking)\n");
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ceph_flush_dirty_caps(fsc->mdsc);
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dout("sync_fs (non-blocking) done\n");
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return 0;
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}
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dout("sync_fs (blocking)\n");
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ceph_osdc_sync(&fsc->client->osdc);
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ceph_mdsc_sync(fsc->mdsc);
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dout("sync_fs (blocking) done\n");
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return 0;
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}
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/*
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* mount options
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*/
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enum {
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Opt_wsize,
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Opt_rsize,
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Opt_rasize,
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Opt_caps_wanted_delay_min,
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Opt_caps_wanted_delay_max,
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Opt_caps_max,
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Opt_readdir_max_entries,
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Opt_readdir_max_bytes,
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Opt_congestion_kb,
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Opt_last_int,
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/* int args above */
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Opt_snapdirname,
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Opt_mds_namespace,
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Opt_fscache_uniq,
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Opt_last_string,
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/* string args above */
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Opt_dirstat,
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Opt_nodirstat,
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Opt_rbytes,
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Opt_norbytes,
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Opt_asyncreaddir,
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Opt_noasyncreaddir,
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Opt_dcache,
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Opt_nodcache,
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Opt_ino32,
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Opt_noino32,
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Opt_fscache,
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Opt_nofscache,
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Opt_poolperm,
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Opt_nopoolperm,
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Opt_require_active_mds,
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Opt_norequire_active_mds,
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#ifdef CONFIG_CEPH_FS_POSIX_ACL
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Opt_acl,
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#endif
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Opt_noacl,
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Opt_quotadf,
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Opt_noquotadf,
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Opt_copyfrom,
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Opt_nocopyfrom,
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};
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static match_table_t fsopt_tokens = {
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{Opt_wsize, "wsize=%d"},
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{Opt_rsize, "rsize=%d"},
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{Opt_rasize, "rasize=%d"},
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{Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
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{Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
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{Opt_caps_max, "caps_max=%d"},
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{Opt_readdir_max_entries, "readdir_max_entries=%d"},
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{Opt_readdir_max_bytes, "readdir_max_bytes=%d"},
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{Opt_congestion_kb, "write_congestion_kb=%d"},
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/* int args above */
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{Opt_snapdirname, "snapdirname=%s"},
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{Opt_mds_namespace, "mds_namespace=%s"},
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{Opt_fscache_uniq, "fsc=%s"},
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/* string args above */
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{Opt_dirstat, "dirstat"},
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{Opt_nodirstat, "nodirstat"},
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{Opt_rbytes, "rbytes"},
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{Opt_norbytes, "norbytes"},
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{Opt_asyncreaddir, "asyncreaddir"},
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{Opt_noasyncreaddir, "noasyncreaddir"},
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{Opt_dcache, "dcache"},
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{Opt_nodcache, "nodcache"},
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{Opt_ino32, "ino32"},
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{Opt_noino32, "noino32"},
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{Opt_fscache, "fsc"},
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{Opt_nofscache, "nofsc"},
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{Opt_poolperm, "poolperm"},
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{Opt_nopoolperm, "nopoolperm"},
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{Opt_require_active_mds, "require_active_mds"},
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{Opt_norequire_active_mds, "norequire_active_mds"},
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#ifdef CONFIG_CEPH_FS_POSIX_ACL
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{Opt_acl, "acl"},
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#endif
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{Opt_noacl, "noacl"},
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{Opt_quotadf, "quotadf"},
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{Opt_noquotadf, "noquotadf"},
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{Opt_copyfrom, "copyfrom"},
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{Opt_nocopyfrom, "nocopyfrom"},
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{-1, NULL}
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};
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static int parse_fsopt_token(char *c, void *private)
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{
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struct ceph_mount_options *fsopt = private;
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substring_t argstr[MAX_OPT_ARGS];
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int token, intval, ret;
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token = match_token((char *)c, fsopt_tokens, argstr);
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if (token < 0)
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return -EINVAL;
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if (token < Opt_last_int) {
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ret = match_int(&argstr[0], &intval);
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if (ret < 0) {
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pr_err("bad option arg (not int) at '%s'\n", c);
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return ret;
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}
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dout("got int token %d val %d\n", token, intval);
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} else if (token > Opt_last_int && token < Opt_last_string) {
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dout("got string token %d val %s\n", token,
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argstr[0].from);
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} else {
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dout("got token %d\n", token);
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}
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switch (token) {
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case Opt_snapdirname:
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kfree(fsopt->snapdir_name);
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fsopt->snapdir_name = kstrndup(argstr[0].from,
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argstr[0].to-argstr[0].from,
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GFP_KERNEL);
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if (!fsopt->snapdir_name)
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return -ENOMEM;
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break;
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case Opt_mds_namespace:
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kfree(fsopt->mds_namespace);
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fsopt->mds_namespace = kstrndup(argstr[0].from,
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argstr[0].to-argstr[0].from,
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GFP_KERNEL);
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if (!fsopt->mds_namespace)
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return -ENOMEM;
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break;
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case Opt_fscache_uniq:
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kfree(fsopt->fscache_uniq);
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fsopt->fscache_uniq = kstrndup(argstr[0].from,
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argstr[0].to-argstr[0].from,
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GFP_KERNEL);
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if (!fsopt->fscache_uniq)
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return -ENOMEM;
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fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE;
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break;
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/* misc */
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case Opt_wsize:
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if (intval < (int)PAGE_SIZE || intval > CEPH_MAX_WRITE_SIZE)
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return -EINVAL;
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fsopt->wsize = ALIGN(intval, PAGE_SIZE);
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break;
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case Opt_rsize:
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if (intval < (int)PAGE_SIZE || intval > CEPH_MAX_READ_SIZE)
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return -EINVAL;
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fsopt->rsize = ALIGN(intval, PAGE_SIZE);
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break;
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case Opt_rasize:
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if (intval < 0)
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return -EINVAL;
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fsopt->rasize = ALIGN(intval, PAGE_SIZE);
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break;
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case Opt_caps_wanted_delay_min:
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if (intval < 1)
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return -EINVAL;
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fsopt->caps_wanted_delay_min = intval;
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break;
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case Opt_caps_wanted_delay_max:
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if (intval < 1)
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return -EINVAL;
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fsopt->caps_wanted_delay_max = intval;
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break;
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case Opt_caps_max:
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if (intval < 0)
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return -EINVAL;
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fsopt->caps_max = intval;
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break;
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case Opt_readdir_max_entries:
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if (intval < 1)
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return -EINVAL;
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fsopt->max_readdir = intval;
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break;
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case Opt_readdir_max_bytes:
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if (intval < (int)PAGE_SIZE && intval != 0)
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return -EINVAL;
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fsopt->max_readdir_bytes = intval;
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break;
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case Opt_congestion_kb:
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if (intval < 1024) /* at least 1M */
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return -EINVAL;
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fsopt->congestion_kb = intval;
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break;
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case Opt_dirstat:
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fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT;
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break;
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case Opt_nodirstat:
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fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT;
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break;
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case Opt_rbytes:
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fsopt->flags |= CEPH_MOUNT_OPT_RBYTES;
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break;
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case Opt_norbytes:
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fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES;
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break;
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case Opt_asyncreaddir:
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fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR;
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break;
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case Opt_noasyncreaddir:
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fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
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break;
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case Opt_dcache:
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fsopt->flags |= CEPH_MOUNT_OPT_DCACHE;
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break;
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case Opt_nodcache:
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fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE;
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break;
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case Opt_ino32:
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fsopt->flags |= CEPH_MOUNT_OPT_INO32;
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break;
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case Opt_noino32:
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fsopt->flags &= ~CEPH_MOUNT_OPT_INO32;
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break;
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case Opt_fscache:
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fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE;
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kfree(fsopt->fscache_uniq);
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fsopt->fscache_uniq = NULL;
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break;
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case Opt_nofscache:
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fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE;
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kfree(fsopt->fscache_uniq);
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fsopt->fscache_uniq = NULL;
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break;
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case Opt_poolperm:
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fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM;
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break;
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case Opt_nopoolperm:
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fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM;
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break;
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case Opt_require_active_mds:
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fsopt->flags &= ~CEPH_MOUNT_OPT_MOUNTWAIT;
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break;
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case Opt_norequire_active_mds:
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fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT;
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break;
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case Opt_quotadf:
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fsopt->flags &= ~CEPH_MOUNT_OPT_NOQUOTADF;
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break;
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case Opt_noquotadf:
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fsopt->flags |= CEPH_MOUNT_OPT_NOQUOTADF;
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break;
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case Opt_copyfrom:
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fsopt->flags &= ~CEPH_MOUNT_OPT_NOCOPYFROM;
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break;
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case Opt_nocopyfrom:
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fsopt->flags |= CEPH_MOUNT_OPT_NOCOPYFROM;
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break;
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#ifdef CONFIG_CEPH_FS_POSIX_ACL
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case Opt_acl:
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fsopt->sb_flags |= SB_POSIXACL;
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break;
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#endif
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case Opt_noacl:
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fsopt->sb_flags &= ~SB_POSIXACL;
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break;
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default:
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BUG_ON(token);
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}
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return 0;
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}
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static void destroy_mount_options(struct ceph_mount_options *args)
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{
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dout("destroy_mount_options %p\n", args);
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kfree(args->snapdir_name);
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kfree(args->mds_namespace);
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kfree(args->server_path);
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kfree(args->fscache_uniq);
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kfree(args);
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}
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static int strcmp_null(const char *s1, const char *s2)
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{
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if (!s1 && !s2)
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return 0;
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|
if (s1 && !s2)
|
|
return -1;
|
|
if (!s1 && s2)
|
|
return 1;
|
|
return strcmp(s1, s2);
|
|
}
|
|
|
|
static int compare_mount_options(struct ceph_mount_options *new_fsopt,
|
|
struct ceph_options *new_opt,
|
|
struct ceph_fs_client *fsc)
|
|
{
|
|
struct ceph_mount_options *fsopt1 = new_fsopt;
|
|
struct ceph_mount_options *fsopt2 = fsc->mount_options;
|
|
int ofs = offsetof(struct ceph_mount_options, snapdir_name);
|
|
int ret;
|
|
|
|
ret = memcmp(fsopt1, fsopt2, ofs);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name);
|
|
if (ret)
|
|
return ret;
|
|
ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace);
|
|
if (ret)
|
|
return ret;
|
|
ret = strcmp_null(fsopt1->server_path, fsopt2->server_path);
|
|
if (ret)
|
|
return ret;
|
|
ret = strcmp_null(fsopt1->fscache_uniq, fsopt2->fscache_uniq);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return ceph_compare_options(new_opt, fsc->client);
|
|
}
|
|
|
|
static int parse_mount_options(struct ceph_mount_options **pfsopt,
|
|
struct ceph_options **popt,
|
|
int flags, char *options,
|
|
const char *dev_name)
|
|
{
|
|
struct ceph_mount_options *fsopt;
|
|
const char *dev_name_end;
|
|
int err;
|
|
|
|
if (!dev_name || !*dev_name)
|
|
return -EINVAL;
|
|
|
|
fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL);
|
|
if (!fsopt)
|
|
return -ENOMEM;
|
|
|
|
dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name);
|
|
|
|
fsopt->sb_flags = flags;
|
|
fsopt->flags = CEPH_MOUNT_OPT_DEFAULT;
|
|
|
|
fsopt->wsize = CEPH_MAX_WRITE_SIZE;
|
|
fsopt->rsize = CEPH_MAX_READ_SIZE;
|
|
fsopt->rasize = CEPH_RASIZE_DEFAULT;
|
|
fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
|
|
if (!fsopt->snapdir_name) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
|
|
fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
|
|
fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT;
|
|
fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT;
|
|
fsopt->congestion_kb = default_congestion_kb();
|
|
|
|
/*
|
|
* Distinguish the server list from the path in "dev_name".
|
|
* Internally we do not include the leading '/' in the path.
|
|
*
|
|
* "dev_name" will look like:
|
|
* <server_spec>[,<server_spec>...]:[<path>]
|
|
* where
|
|
* <server_spec> is <ip>[:<port>]
|
|
* <path> is optional, but if present must begin with '/'
|
|
*/
|
|
dev_name_end = strchr(dev_name, '/');
|
|
if (dev_name_end) {
|
|
if (strlen(dev_name_end) > 1) {
|
|
fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL);
|
|
if (!fsopt->server_path) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
}
|
|
} else {
|
|
dev_name_end = dev_name + strlen(dev_name);
|
|
}
|
|
err = -EINVAL;
|
|
dev_name_end--; /* back up to ':' separator */
|
|
if (dev_name_end < dev_name || *dev_name_end != ':') {
|
|
pr_err("device name is missing path (no : separator in %s)\n",
|
|
dev_name);
|
|
goto out;
|
|
}
|
|
dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name);
|
|
if (fsopt->server_path)
|
|
dout("server path '%s'\n", fsopt->server_path);
|
|
|
|
*popt = ceph_parse_options(options, dev_name, dev_name_end,
|
|
parse_fsopt_token, (void *)fsopt);
|
|
if (IS_ERR(*popt)) {
|
|
err = PTR_ERR(*popt);
|
|
goto out;
|
|
}
|
|
|
|
/* success */
|
|
*pfsopt = fsopt;
|
|
return 0;
|
|
|
|
out:
|
|
destroy_mount_options(fsopt);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ceph_show_options - Show mount options in /proc/mounts
|
|
* @m: seq_file to write to
|
|
* @root: root of that (sub)tree
|
|
*/
|
|
static int ceph_show_options(struct seq_file *m, struct dentry *root)
|
|
{
|
|
struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb);
|
|
struct ceph_mount_options *fsopt = fsc->mount_options;
|
|
size_t pos;
|
|
int ret;
|
|
|
|
/* a comma between MNT/MS and client options */
|
|
seq_putc(m, ',');
|
|
pos = m->count;
|
|
|
|
ret = ceph_print_client_options(m, fsc->client, false);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* retract our comma if no client options */
|
|
if (m->count == pos)
|
|
m->count--;
|
|
|
|
if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT)
|
|
seq_puts(m, ",dirstat");
|
|
if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES))
|
|
seq_puts(m, ",rbytes");
|
|
if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR)
|
|
seq_puts(m, ",noasyncreaddir");
|
|
if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0)
|
|
seq_puts(m, ",nodcache");
|
|
if (fsopt->flags & CEPH_MOUNT_OPT_INO32)
|
|
seq_puts(m, ",ino32");
|
|
if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) {
|
|
seq_show_option(m, "fsc", fsopt->fscache_uniq);
|
|
}
|
|
if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM)
|
|
seq_puts(m, ",nopoolperm");
|
|
if (fsopt->flags & CEPH_MOUNT_OPT_NOQUOTADF)
|
|
seq_puts(m, ",noquotadf");
|
|
|
|
#ifdef CONFIG_CEPH_FS_POSIX_ACL
|
|
if (fsopt->sb_flags & SB_POSIXACL)
|
|
seq_puts(m, ",acl");
|
|
else
|
|
seq_puts(m, ",noacl");
|
|
#endif
|
|
|
|
if ((fsopt->flags & CEPH_MOUNT_OPT_NOCOPYFROM) == 0)
|
|
seq_puts(m, ",copyfrom");
|
|
|
|
if (fsopt->mds_namespace)
|
|
seq_show_option(m, "mds_namespace", fsopt->mds_namespace);
|
|
if (fsopt->wsize != CEPH_MAX_WRITE_SIZE)
|
|
seq_printf(m, ",wsize=%d", fsopt->wsize);
|
|
if (fsopt->rsize != CEPH_MAX_READ_SIZE)
|
|
seq_printf(m, ",rsize=%d", fsopt->rsize);
|
|
if (fsopt->rasize != CEPH_RASIZE_DEFAULT)
|
|
seq_printf(m, ",rasize=%d", fsopt->rasize);
|
|
if (fsopt->congestion_kb != default_congestion_kb())
|
|
seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb);
|
|
if (fsopt->caps_max)
|
|
seq_printf(m, ",caps_max=%d", fsopt->caps_max);
|
|
if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
|
|
seq_printf(m, ",caps_wanted_delay_min=%d",
|
|
fsopt->caps_wanted_delay_min);
|
|
if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT)
|
|
seq_printf(m, ",caps_wanted_delay_max=%d",
|
|
fsopt->caps_wanted_delay_max);
|
|
if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT)
|
|
seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir);
|
|
if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT)
|
|
seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes);
|
|
if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
|
|
seq_show_option(m, "snapdirname", fsopt->snapdir_name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* handle any mon messages the standard library doesn't understand.
|
|
* return error if we don't either.
|
|
*/
|
|
static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg)
|
|
{
|
|
struct ceph_fs_client *fsc = client->private;
|
|
int type = le16_to_cpu(msg->hdr.type);
|
|
|
|
switch (type) {
|
|
case CEPH_MSG_MDS_MAP:
|
|
ceph_mdsc_handle_mdsmap(fsc->mdsc, msg);
|
|
return 0;
|
|
case CEPH_MSG_FS_MAP_USER:
|
|
ceph_mdsc_handle_fsmap(fsc->mdsc, msg);
|
|
return 0;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* create a new fs client
|
|
*
|
|
* Success or not, this function consumes @fsopt and @opt.
|
|
*/
|
|
static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
|
|
struct ceph_options *opt)
|
|
{
|
|
struct ceph_fs_client *fsc;
|
|
int page_count;
|
|
size_t size;
|
|
int err;
|
|
|
|
fsc = kzalloc(sizeof(*fsc), GFP_KERNEL);
|
|
if (!fsc) {
|
|
err = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
fsc->client = ceph_create_client(opt, fsc);
|
|
if (IS_ERR(fsc->client)) {
|
|
err = PTR_ERR(fsc->client);
|
|
goto fail;
|
|
}
|
|
opt = NULL; /* fsc->client now owns this */
|
|
|
|
fsc->client->extra_mon_dispatch = extra_mon_dispatch;
|
|
ceph_set_opt(fsc->client, ABORT_ON_FULL);
|
|
|
|
if (!fsopt->mds_namespace) {
|
|
ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP,
|
|
0, true);
|
|
} else {
|
|
ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_FSMAP,
|
|
0, false);
|
|
}
|
|
|
|
fsc->mount_options = fsopt;
|
|
|
|
fsc->sb = NULL;
|
|
fsc->mount_state = CEPH_MOUNT_MOUNTING;
|
|
|
|
atomic_long_set(&fsc->writeback_count, 0);
|
|
|
|
err = -ENOMEM;
|
|
/*
|
|
* The number of concurrent works can be high but they don't need
|
|
* to be processed in parallel, limit concurrency.
|
|
*/
|
|
fsc->inode_wq = alloc_workqueue("ceph-inode", WQ_UNBOUND, 0);
|
|
if (!fsc->inode_wq)
|
|
goto fail_client;
|
|
fsc->cap_wq = alloc_workqueue("ceph-cap", 0, 1);
|
|
if (!fsc->cap_wq)
|
|
goto fail_inode_wq;
|
|
|
|
/* set up mempools */
|
|
err = -ENOMEM;
|
|
page_count = fsc->mount_options->wsize >> PAGE_SHIFT;
|
|
size = sizeof (struct page *) * (page_count ? page_count : 1);
|
|
fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size);
|
|
if (!fsc->wb_pagevec_pool)
|
|
goto fail_cap_wq;
|
|
|
|
return fsc;
|
|
|
|
fail_cap_wq:
|
|
destroy_workqueue(fsc->cap_wq);
|
|
fail_inode_wq:
|
|
destroy_workqueue(fsc->inode_wq);
|
|
fail_client:
|
|
ceph_destroy_client(fsc->client);
|
|
fail:
|
|
kfree(fsc);
|
|
if (opt)
|
|
ceph_destroy_options(opt);
|
|
destroy_mount_options(fsopt);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static void flush_fs_workqueues(struct ceph_fs_client *fsc)
|
|
{
|
|
flush_workqueue(fsc->inode_wq);
|
|
flush_workqueue(fsc->cap_wq);
|
|
}
|
|
|
|
static void destroy_fs_client(struct ceph_fs_client *fsc)
|
|
{
|
|
dout("destroy_fs_client %p\n", fsc);
|
|
|
|
destroy_workqueue(fsc->inode_wq);
|
|
destroy_workqueue(fsc->cap_wq);
|
|
|
|
mempool_destroy(fsc->wb_pagevec_pool);
|
|
|
|
destroy_mount_options(fsc->mount_options);
|
|
|
|
ceph_destroy_client(fsc->client);
|
|
|
|
kfree(fsc);
|
|
dout("destroy_fs_client %p done\n", fsc);
|
|
}
|
|
|
|
/*
|
|
* caches
|
|
*/
|
|
struct kmem_cache *ceph_inode_cachep;
|
|
struct kmem_cache *ceph_cap_cachep;
|
|
struct kmem_cache *ceph_cap_flush_cachep;
|
|
struct kmem_cache *ceph_dentry_cachep;
|
|
struct kmem_cache *ceph_file_cachep;
|
|
struct kmem_cache *ceph_dir_file_cachep;
|
|
|
|
static void ceph_inode_init_once(void *foo)
|
|
{
|
|
struct ceph_inode_info *ci = foo;
|
|
inode_init_once(&ci->vfs_inode);
|
|
}
|
|
|
|
static int __init init_caches(void)
|
|
{
|
|
int error = -ENOMEM;
|
|
|
|
ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
|
|
sizeof(struct ceph_inode_info),
|
|
__alignof__(struct ceph_inode_info),
|
|
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
|
|
SLAB_ACCOUNT, ceph_inode_init_once);
|
|
if (!ceph_inode_cachep)
|
|
return -ENOMEM;
|
|
|
|
ceph_cap_cachep = KMEM_CACHE(ceph_cap, SLAB_MEM_SPREAD);
|
|
if (!ceph_cap_cachep)
|
|
goto bad_cap;
|
|
ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush,
|
|
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
|
|
if (!ceph_cap_flush_cachep)
|
|
goto bad_cap_flush;
|
|
|
|
ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
|
|
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
|
|
if (!ceph_dentry_cachep)
|
|
goto bad_dentry;
|
|
|
|
ceph_file_cachep = KMEM_CACHE(ceph_file_info, SLAB_MEM_SPREAD);
|
|
if (!ceph_file_cachep)
|
|
goto bad_file;
|
|
|
|
ceph_dir_file_cachep = KMEM_CACHE(ceph_dir_file_info, SLAB_MEM_SPREAD);
|
|
if (!ceph_dir_file_cachep)
|
|
goto bad_dir_file;
|
|
|
|
error = ceph_fscache_register();
|
|
if (error)
|
|
goto bad_fscache;
|
|
|
|
return 0;
|
|
|
|
bad_fscache:
|
|
kmem_cache_destroy(ceph_dir_file_cachep);
|
|
bad_dir_file:
|
|
kmem_cache_destroy(ceph_file_cachep);
|
|
bad_file:
|
|
kmem_cache_destroy(ceph_dentry_cachep);
|
|
bad_dentry:
|
|
kmem_cache_destroy(ceph_cap_flush_cachep);
|
|
bad_cap_flush:
|
|
kmem_cache_destroy(ceph_cap_cachep);
|
|
bad_cap:
|
|
kmem_cache_destroy(ceph_inode_cachep);
|
|
return error;
|
|
}
|
|
|
|
static void destroy_caches(void)
|
|
{
|
|
/*
|
|
* Make sure all delayed rcu free inodes are flushed before we
|
|
* destroy cache.
|
|
*/
|
|
rcu_barrier();
|
|
|
|
kmem_cache_destroy(ceph_inode_cachep);
|
|
kmem_cache_destroy(ceph_cap_cachep);
|
|
kmem_cache_destroy(ceph_cap_flush_cachep);
|
|
kmem_cache_destroy(ceph_dentry_cachep);
|
|
kmem_cache_destroy(ceph_file_cachep);
|
|
kmem_cache_destroy(ceph_dir_file_cachep);
|
|
|
|
ceph_fscache_unregister();
|
|
}
|
|
|
|
|
|
/*
|
|
* ceph_umount_begin - initiate forced umount. Tear down down the
|
|
* mount, skipping steps that may hang while waiting for server(s).
|
|
*/
|
|
static void ceph_umount_begin(struct super_block *sb)
|
|
{
|
|
struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
|
|
|
|
dout("ceph_umount_begin - starting forced umount\n");
|
|
if (!fsc)
|
|
return;
|
|
fsc->mount_state = CEPH_MOUNT_SHUTDOWN;
|
|
ceph_osdc_abort_requests(&fsc->client->osdc, -EIO);
|
|
ceph_mdsc_force_umount(fsc->mdsc);
|
|
return;
|
|
}
|
|
|
|
static int ceph_remount(struct super_block *sb, int *flags, char *data)
|
|
{
|
|
sync_filesystem(sb);
|
|
return 0;
|
|
}
|
|
|
|
static const struct super_operations ceph_super_ops = {
|
|
.alloc_inode = ceph_alloc_inode,
|
|
.free_inode = ceph_free_inode,
|
|
.write_inode = ceph_write_inode,
|
|
.drop_inode = generic_delete_inode,
|
|
.evict_inode = ceph_evict_inode,
|
|
.sync_fs = ceph_sync_fs,
|
|
.put_super = ceph_put_super,
|
|
.remount_fs = ceph_remount,
|
|
.show_options = ceph_show_options,
|
|
.statfs = ceph_statfs,
|
|
.umount_begin = ceph_umount_begin,
|
|
};
|
|
|
|
/*
|
|
* Bootstrap mount by opening the root directory. Note the mount
|
|
* @started time from caller, and time out if this takes too long.
|
|
*/
|
|
static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
|
|
const char *path,
|
|
unsigned long started)
|
|
{
|
|
struct ceph_mds_client *mdsc = fsc->mdsc;
|
|
struct ceph_mds_request *req = NULL;
|
|
int err;
|
|
struct dentry *root;
|
|
|
|
/* open dir */
|
|
dout("open_root_inode opening '%s'\n", path);
|
|
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
|
|
if (IS_ERR(req))
|
|
return ERR_CAST(req);
|
|
req->r_path1 = kstrdup(path, GFP_NOFS);
|
|
if (!req->r_path1) {
|
|
root = ERR_PTR(-ENOMEM);
|
|
goto out;
|
|
}
|
|
|
|
req->r_ino1.ino = CEPH_INO_ROOT;
|
|
req->r_ino1.snap = CEPH_NOSNAP;
|
|
req->r_started = started;
|
|
req->r_timeout = fsc->client->options->mount_timeout;
|
|
req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
|
|
req->r_num_caps = 2;
|
|
err = ceph_mdsc_do_request(mdsc, NULL, req);
|
|
if (err == 0) {
|
|
struct inode *inode = req->r_target_inode;
|
|
req->r_target_inode = NULL;
|
|
dout("open_root_inode success\n");
|
|
root = d_make_root(inode);
|
|
if (!root) {
|
|
root = ERR_PTR(-ENOMEM);
|
|
goto out;
|
|
}
|
|
dout("open_root_inode success, root dentry is %p\n", root);
|
|
} else {
|
|
root = ERR_PTR(err);
|
|
}
|
|
out:
|
|
ceph_mdsc_put_request(req);
|
|
return root;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
* mount: join the ceph cluster, and open root directory.
|
|
*/
|
|
static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc)
|
|
{
|
|
int err;
|
|
unsigned long started = jiffies; /* note the start time */
|
|
struct dentry *root;
|
|
|
|
dout("mount start %p\n", fsc);
|
|
mutex_lock(&fsc->client->mount_mutex);
|
|
|
|
if (!fsc->sb->s_root) {
|
|
const char *path;
|
|
err = __ceph_open_session(fsc->client, started);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
/* setup fscache */
|
|
if (fsc->mount_options->flags & CEPH_MOUNT_OPT_FSCACHE) {
|
|
err = ceph_fscache_register_fs(fsc);
|
|
if (err < 0)
|
|
goto out;
|
|
}
|
|
|
|
if (!fsc->mount_options->server_path) {
|
|
path = "";
|
|
dout("mount opening path \\t\n");
|
|
} else {
|
|
path = fsc->mount_options->server_path + 1;
|
|
dout("mount opening path %s\n", path);
|
|
}
|
|
|
|
ceph_fs_debugfs_init(fsc);
|
|
|
|
root = open_root_dentry(fsc, path, started);
|
|
if (IS_ERR(root)) {
|
|
err = PTR_ERR(root);
|
|
goto out;
|
|
}
|
|
fsc->sb->s_root = dget(root);
|
|
} else {
|
|
root = dget(fsc->sb->s_root);
|
|
}
|
|
|
|
fsc->mount_state = CEPH_MOUNT_MOUNTED;
|
|
dout("mount success\n");
|
|
mutex_unlock(&fsc->client->mount_mutex);
|
|
return root;
|
|
|
|
out:
|
|
mutex_unlock(&fsc->client->mount_mutex);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static int ceph_set_super(struct super_block *s, void *data)
|
|
{
|
|
struct ceph_fs_client *fsc = data;
|
|
int ret;
|
|
|
|
dout("set_super %p data %p\n", s, data);
|
|
|
|
s->s_flags = fsc->mount_options->sb_flags;
|
|
s->s_maxbytes = MAX_LFS_FILESIZE;
|
|
|
|
s->s_xattr = ceph_xattr_handlers;
|
|
s->s_fs_info = fsc;
|
|
fsc->sb = s;
|
|
fsc->max_file_size = 1ULL << 40; /* temp value until we get mdsmap */
|
|
|
|
s->s_op = &ceph_super_ops;
|
|
s->s_d_op = &ceph_dentry_ops;
|
|
s->s_export_op = &ceph_export_ops;
|
|
|
|
s->s_time_gran = 1;
|
|
|
|
ret = set_anon_super(s, NULL); /* what is that second arg for? */
|
|
if (ret != 0)
|
|
goto fail;
|
|
|
|
return ret;
|
|
|
|
fail:
|
|
s->s_fs_info = NULL;
|
|
fsc->sb = NULL;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* share superblock if same fs AND options
|
|
*/
|
|
static int ceph_compare_super(struct super_block *sb, void *data)
|
|
{
|
|
struct ceph_fs_client *new = data;
|
|
struct ceph_mount_options *fsopt = new->mount_options;
|
|
struct ceph_options *opt = new->client->options;
|
|
struct ceph_fs_client *other = ceph_sb_to_client(sb);
|
|
|
|
dout("ceph_compare_super %p\n", sb);
|
|
|
|
if (compare_mount_options(fsopt, opt, other)) {
|
|
dout("monitor(s)/mount options don't match\n");
|
|
return 0;
|
|
}
|
|
if ((opt->flags & CEPH_OPT_FSID) &&
|
|
ceph_fsid_compare(&opt->fsid, &other->client->fsid)) {
|
|
dout("fsid doesn't match\n");
|
|
return 0;
|
|
}
|
|
if (fsopt->sb_flags != other->mount_options->sb_flags) {
|
|
dout("flags differ\n");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* construct our own bdi so we can control readahead, etc.
|
|
*/
|
|
static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
|
|
|
|
static int ceph_setup_bdi(struct super_block *sb, struct ceph_fs_client *fsc)
|
|
{
|
|
int err;
|
|
|
|
err = super_setup_bdi_name(sb, "ceph-%ld",
|
|
atomic_long_inc_return(&bdi_seq));
|
|
if (err)
|
|
return err;
|
|
|
|
/* set ra_pages based on rasize mount option? */
|
|
sb->s_bdi->ra_pages = fsc->mount_options->rasize >> PAGE_SHIFT;
|
|
|
|
/* set io_pages based on max osd read size */
|
|
sb->s_bdi->io_pages = fsc->mount_options->rsize >> PAGE_SHIFT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct dentry *ceph_mount(struct file_system_type *fs_type,
|
|
int flags, const char *dev_name, void *data)
|
|
{
|
|
struct super_block *sb;
|
|
struct ceph_fs_client *fsc;
|
|
struct dentry *res;
|
|
int err;
|
|
int (*compare_super)(struct super_block *, void *) = ceph_compare_super;
|
|
struct ceph_mount_options *fsopt = NULL;
|
|
struct ceph_options *opt = NULL;
|
|
|
|
dout("ceph_mount\n");
|
|
|
|
#ifdef CONFIG_CEPH_FS_POSIX_ACL
|
|
flags |= SB_POSIXACL;
|
|
#endif
|
|
err = parse_mount_options(&fsopt, &opt, flags, data, dev_name);
|
|
if (err < 0) {
|
|
res = ERR_PTR(err);
|
|
goto out_final;
|
|
}
|
|
|
|
/* create client (which we may/may not use) */
|
|
fsc = create_fs_client(fsopt, opt);
|
|
if (IS_ERR(fsc)) {
|
|
res = ERR_CAST(fsc);
|
|
goto out_final;
|
|
}
|
|
|
|
err = ceph_mdsc_init(fsc);
|
|
if (err < 0) {
|
|
res = ERR_PTR(err);
|
|
goto out;
|
|
}
|
|
|
|
if (ceph_test_opt(fsc->client, NOSHARE))
|
|
compare_super = NULL;
|
|
sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc);
|
|
if (IS_ERR(sb)) {
|
|
res = ERR_CAST(sb);
|
|
goto out;
|
|
}
|
|
|
|
if (ceph_sb_to_client(sb) != fsc) {
|
|
ceph_mdsc_destroy(fsc);
|
|
destroy_fs_client(fsc);
|
|
fsc = ceph_sb_to_client(sb);
|
|
dout("get_sb got existing client %p\n", fsc);
|
|
} else {
|
|
dout("get_sb using new client %p\n", fsc);
|
|
err = ceph_setup_bdi(sb, fsc);
|
|
if (err < 0) {
|
|
res = ERR_PTR(err);
|
|
goto out_splat;
|
|
}
|
|
}
|
|
|
|
res = ceph_real_mount(fsc);
|
|
if (IS_ERR(res))
|
|
goto out_splat;
|
|
dout("root %p inode %p ino %llx.%llx\n", res,
|
|
d_inode(res), ceph_vinop(d_inode(res)));
|
|
return res;
|
|
|
|
out_splat:
|
|
ceph_mdsc_close_sessions(fsc->mdsc);
|
|
deactivate_locked_super(sb);
|
|
goto out_final;
|
|
|
|
out:
|
|
ceph_mdsc_destroy(fsc);
|
|
destroy_fs_client(fsc);
|
|
out_final:
|
|
dout("ceph_mount fail %ld\n", PTR_ERR(res));
|
|
return res;
|
|
}
|
|
|
|
static void ceph_kill_sb(struct super_block *s)
|
|
{
|
|
struct ceph_fs_client *fsc = ceph_sb_to_client(s);
|
|
dev_t dev = s->s_dev;
|
|
|
|
dout("kill_sb %p\n", s);
|
|
|
|
ceph_mdsc_pre_umount(fsc->mdsc);
|
|
flush_fs_workqueues(fsc);
|
|
|
|
generic_shutdown_super(s);
|
|
|
|
fsc->client->extra_mon_dispatch = NULL;
|
|
ceph_fs_debugfs_cleanup(fsc);
|
|
|
|
ceph_fscache_unregister_fs(fsc);
|
|
|
|
ceph_mdsc_destroy(fsc);
|
|
|
|
destroy_fs_client(fsc);
|
|
free_anon_bdev(dev);
|
|
}
|
|
|
|
static struct file_system_type ceph_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ceph",
|
|
.mount = ceph_mount,
|
|
.kill_sb = ceph_kill_sb,
|
|
.fs_flags = FS_RENAME_DOES_D_MOVE,
|
|
};
|
|
MODULE_ALIAS_FS("ceph");
|
|
|
|
static int __init init_ceph(void)
|
|
{
|
|
int ret = init_caches();
|
|
if (ret)
|
|
goto out;
|
|
|
|
ceph_flock_init();
|
|
ret = register_filesystem(&ceph_fs_type);
|
|
if (ret)
|
|
goto out_caches;
|
|
|
|
pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL);
|
|
|
|
return 0;
|
|
|
|
out_caches:
|
|
destroy_caches();
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit exit_ceph(void)
|
|
{
|
|
dout("exit_ceph\n");
|
|
unregister_filesystem(&ceph_fs_type);
|
|
destroy_caches();
|
|
}
|
|
|
|
module_init(init_ceph);
|
|
module_exit(exit_ceph);
|
|
|
|
MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
|
|
MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
|
|
MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
|
|
MODULE_DESCRIPTION("Ceph filesystem for Linux");
|
|
MODULE_LICENSE("GPL");
|