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1325 lines
32 KiB
1325 lines
32 KiB
// 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/fs_context.h> |
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#include <linux/fs_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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static DEFINE_SPINLOCK(ceph_fsc_lock); |
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static LIST_HEAD(ceph_fsc_list); |
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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 = u64_to_fsid(fsid); |
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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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/* int args above */ |
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Opt_snapdirname, |
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Opt_mds_namespace, |
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Opt_recover_session, |
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Opt_source, |
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/* string args above */ |
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Opt_dirstat, |
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Opt_rbytes, |
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Opt_asyncreaddir, |
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Opt_dcache, |
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Opt_ino32, |
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Opt_fscache, |
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Opt_poolperm, |
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Opt_require_active_mds, |
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Opt_acl, |
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Opt_quotadf, |
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Opt_copyfrom, |
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Opt_wsync, |
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}; |
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enum ceph_recover_session_mode { |
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ceph_recover_session_no, |
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ceph_recover_session_clean |
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}; |
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static const struct constant_table ceph_param_recover[] = { |
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{ "no", ceph_recover_session_no }, |
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{ "clean", ceph_recover_session_clean }, |
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{} |
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}; |
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static const struct fs_parameter_spec ceph_mount_parameters[] = { |
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fsparam_flag_no ("acl", Opt_acl), |
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fsparam_flag_no ("asyncreaddir", Opt_asyncreaddir), |
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fsparam_s32 ("caps_max", Opt_caps_max), |
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fsparam_u32 ("caps_wanted_delay_max", Opt_caps_wanted_delay_max), |
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fsparam_u32 ("caps_wanted_delay_min", Opt_caps_wanted_delay_min), |
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fsparam_u32 ("write_congestion_kb", Opt_congestion_kb), |
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fsparam_flag_no ("copyfrom", Opt_copyfrom), |
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fsparam_flag_no ("dcache", Opt_dcache), |
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fsparam_flag_no ("dirstat", Opt_dirstat), |
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fsparam_flag_no ("fsc", Opt_fscache), // fsc|nofsc |
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fsparam_string ("fsc", Opt_fscache), // fsc=... |
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fsparam_flag_no ("ino32", Opt_ino32), |
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fsparam_string ("mds_namespace", Opt_mds_namespace), |
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fsparam_flag_no ("poolperm", Opt_poolperm), |
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fsparam_flag_no ("quotadf", Opt_quotadf), |
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fsparam_u32 ("rasize", Opt_rasize), |
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fsparam_flag_no ("rbytes", Opt_rbytes), |
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fsparam_u32 ("readdir_max_bytes", Opt_readdir_max_bytes), |
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fsparam_u32 ("readdir_max_entries", Opt_readdir_max_entries), |
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fsparam_enum ("recover_session", Opt_recover_session, ceph_param_recover), |
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fsparam_flag_no ("require_active_mds", Opt_require_active_mds), |
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fsparam_u32 ("rsize", Opt_rsize), |
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fsparam_string ("snapdirname", Opt_snapdirname), |
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fsparam_string ("source", Opt_source), |
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fsparam_u32 ("wsize", Opt_wsize), |
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fsparam_flag_no ("wsync", Opt_wsync), |
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{} |
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}; |
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struct ceph_parse_opts_ctx { |
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struct ceph_options *copts; |
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struct ceph_mount_options *opts; |
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}; |
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/* |
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* Remove adjacent slashes and then the trailing slash, unless it is |
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* the only remaining character. |
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* |
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* E.g. "//dir1////dir2///" --> "/dir1/dir2", "///" --> "/". |
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*/ |
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static void canonicalize_path(char *path) |
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{ |
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int i, j = 0; |
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for (i = 0; path[i] != '\0'; i++) { |
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if (path[i] != '/' || j < 1 || path[j - 1] != '/') |
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path[j++] = path[i]; |
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} |
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if (j > 1 && path[j - 1] == '/') |
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j--; |
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path[j] = '\0'; |
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} |
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/* |
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* Parse the source parameter. Distinguish the server list from the path. |
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* |
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* The source will look like: |
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* <server_spec>[,<server_spec>...]:[<path>] |
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* where |
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* <server_spec> is <ip>[:<port>] |
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* <path> is optional, but if present must begin with '/' |
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*/ |
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static int ceph_parse_source(struct fs_parameter *param, struct fs_context *fc) |
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{ |
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struct ceph_parse_opts_ctx *pctx = fc->fs_private; |
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struct ceph_mount_options *fsopt = pctx->opts; |
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char *dev_name = param->string, *dev_name_end; |
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int ret; |
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dout("%s '%s'\n", __func__, dev_name); |
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if (!dev_name || !*dev_name) |
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return invalfc(fc, "Empty source"); |
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dev_name_end = strchr(dev_name, '/'); |
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if (dev_name_end) { |
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/* |
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* The server_path will include the whole chars from userland |
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* including the leading '/'. |
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*/ |
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kfree(fsopt->server_path); |
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fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL); |
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if (!fsopt->server_path) |
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return -ENOMEM; |
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canonicalize_path(fsopt->server_path); |
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} else { |
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dev_name_end = dev_name + strlen(dev_name); |
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} |
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dev_name_end--; /* back up to ':' separator */ |
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if (dev_name_end < dev_name || *dev_name_end != ':') |
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return invalfc(fc, "No path or : separator in source"); |
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dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
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if (fsopt->server_path) |
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dout("server path '%s'\n", fsopt->server_path); |
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ret = ceph_parse_mon_ips(param->string, dev_name_end - dev_name, |
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pctx->copts, fc->log.log); |
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if (ret) |
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return ret; |
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fc->source = param->string; |
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param->string = NULL; |
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return 0; |
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} |
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static int ceph_parse_mount_param(struct fs_context *fc, |
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struct fs_parameter *param) |
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{ |
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struct ceph_parse_opts_ctx *pctx = fc->fs_private; |
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struct ceph_mount_options *fsopt = pctx->opts; |
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struct fs_parse_result result; |
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unsigned int mode; |
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int token, ret; |
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ret = ceph_parse_param(param, pctx->copts, fc->log.log); |
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if (ret != -ENOPARAM) |
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return ret; |
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token = fs_parse(fc, ceph_mount_parameters, param, &result); |
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dout("%s fs_parse '%s' token %d\n", __func__, param->key, token); |
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if (token < 0) |
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return token; |
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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 = param->string; |
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param->string = NULL; |
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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 = param->string; |
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param->string = NULL; |
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break; |
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case Opt_recover_session: |
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mode = result.uint_32; |
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if (mode == ceph_recover_session_no) |
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fsopt->flags &= ~CEPH_MOUNT_OPT_CLEANRECOVER; |
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else if (mode == ceph_recover_session_clean) |
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fsopt->flags |= CEPH_MOUNT_OPT_CLEANRECOVER; |
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else |
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BUG(); |
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break; |
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case Opt_source: |
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if (fc->source) |
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return invalfc(fc, "Multiple sources specified"); |
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return ceph_parse_source(param, fc); |
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case Opt_wsize: |
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if (result.uint_32 < PAGE_SIZE || |
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result.uint_32 > CEPH_MAX_WRITE_SIZE) |
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goto out_of_range; |
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fsopt->wsize = ALIGN(result.uint_32, PAGE_SIZE); |
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break; |
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case Opt_rsize: |
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if (result.uint_32 < PAGE_SIZE || |
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result.uint_32 > CEPH_MAX_READ_SIZE) |
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goto out_of_range; |
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fsopt->rsize = ALIGN(result.uint_32, PAGE_SIZE); |
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break; |
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case Opt_rasize: |
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fsopt->rasize = ALIGN(result.uint_32, PAGE_SIZE); |
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break; |
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case Opt_caps_wanted_delay_min: |
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if (result.uint_32 < 1) |
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goto out_of_range; |
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fsopt->caps_wanted_delay_min = result.uint_32; |
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break; |
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case Opt_caps_wanted_delay_max: |
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if (result.uint_32 < 1) |
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goto out_of_range; |
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fsopt->caps_wanted_delay_max = result.uint_32; |
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break; |
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case Opt_caps_max: |
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if (result.int_32 < 0) |
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goto out_of_range; |
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fsopt->caps_max = result.int_32; |
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break; |
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case Opt_readdir_max_entries: |
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if (result.uint_32 < 1) |
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goto out_of_range; |
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fsopt->max_readdir = result.uint_32; |
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break; |
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case Opt_readdir_max_bytes: |
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if (result.uint_32 < PAGE_SIZE && result.uint_32 != 0) |
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goto out_of_range; |
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fsopt->max_readdir_bytes = result.uint_32; |
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break; |
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case Opt_congestion_kb: |
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if (result.uint_32 < 1024) /* at least 1M */ |
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goto out_of_range; |
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fsopt->congestion_kb = result.uint_32; |
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break; |
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case Opt_dirstat: |
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if (!result.negated) |
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fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; |
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else |
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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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if (!result.negated) |
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fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; |
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else |
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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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if (!result.negated) |
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fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; |
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else |
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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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if (!result.negated) |
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fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; |
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else |
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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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if (!result.negated) |
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fsopt->flags |= CEPH_MOUNT_OPT_INO32; |
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else |
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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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#ifdef CONFIG_CEPH_FSCACHE |
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kfree(fsopt->fscache_uniq); |
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fsopt->fscache_uniq = NULL; |
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if (result.negated) { |
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fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; |
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} else { |
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fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; |
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fsopt->fscache_uniq = param->string; |
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param->string = NULL; |
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} |
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break; |
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#else |
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return invalfc(fc, "fscache support is disabled"); |
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#endif |
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case Opt_poolperm: |
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if (!result.negated) |
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fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; |
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else |
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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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if (!result.negated) |
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fsopt->flags &= ~CEPH_MOUNT_OPT_MOUNTWAIT; |
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else |
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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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if (!result.negated) |
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fsopt->flags &= ~CEPH_MOUNT_OPT_NOQUOTADF; |
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else |
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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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if (!result.negated) |
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fsopt->flags &= ~CEPH_MOUNT_OPT_NOCOPYFROM; |
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else |
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fsopt->flags |= CEPH_MOUNT_OPT_NOCOPYFROM; |
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break; |
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case Opt_acl: |
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if (!result.negated) { |
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#ifdef CONFIG_CEPH_FS_POSIX_ACL |
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fc->sb_flags |= SB_POSIXACL; |
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#else |
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return invalfc(fc, "POSIX ACL support is disabled"); |
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#endif |
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} else { |
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fc->sb_flags &= ~SB_POSIXACL; |
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} |
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break; |
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case Opt_wsync: |
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if (!result.negated) |
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fsopt->flags &= ~CEPH_MOUNT_OPT_ASYNC_DIROPS; |
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else |
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fsopt->flags |= CEPH_MOUNT_OPT_ASYNC_DIROPS; |
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break; |
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default: |
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BUG(); |
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} |
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return 0; |
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|
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out_of_range: |
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return invalfc(fc, "%s out of range", param->key); |
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} |
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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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if (!args) |
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return; |
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|
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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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|
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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) |
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return -1; |
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if (!s1 && s2) |
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return 1; |
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return strcmp(s1, s2); |
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} |
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|
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static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
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struct ceph_options *new_opt, |
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struct ceph_fs_client *fsc) |
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{ |
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struct ceph_mount_options *fsopt1 = new_fsopt; |
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struct ceph_mount_options *fsopt2 = fsc->mount_options; |
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int ofs = offsetof(struct ceph_mount_options, snapdir_name); |
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int ret; |
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|
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ret = memcmp(fsopt1, fsopt2, ofs); |
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if (ret) |
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return ret; |
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|
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ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); |
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if (ret) |
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return ret; |
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|
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ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace); |
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if (ret) |
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return ret; |
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|
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ret = strcmp_null(fsopt1->server_path, fsopt2->server_path); |
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if (ret) |
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return ret; |
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|
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ret = strcmp_null(fsopt1->fscache_uniq, fsopt2->fscache_uniq); |
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if (ret) |
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return ret; |
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|
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return ceph_compare_options(new_opt, fsc->client); |
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} |
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|
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/** |
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* ceph_show_options - Show mount options in /proc/mounts |
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* @m: seq_file to write to |
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* @root: root of that (sub)tree |
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*/ |
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static int ceph_show_options(struct seq_file *m, struct dentry *root) |
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{ |
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struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
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struct ceph_mount_options *fsopt = fsc->mount_options; |
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size_t pos; |
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int ret; |
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|
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/* a comma between MNT/MS and client options */ |
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seq_putc(m, ','); |
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pos = m->count; |
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|
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ret = ceph_print_client_options(m, fsc->client, false); |
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if (ret) |
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return ret; |
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|
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/* retract our comma if no client options */ |
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if (m->count == pos) |
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m->count--; |
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|
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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 (root->d_sb->s_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->flags & CEPH_MOUNT_OPT_CLEANRECOVER) |
|
seq_show_option(m, "recover_session", "clean"); |
|
|
|
if (fsopt->flags & CEPH_MOUNT_OPT_ASYNC_DIROPS) |
|
seq_puts(m, ",nowsync"); |
|
|
|
if (fsopt->wsize != CEPH_MAX_WRITE_SIZE) |
|
seq_printf(m, ",wsize=%u", fsopt->wsize); |
|
if (fsopt->rsize != CEPH_MAX_READ_SIZE) |
|
seq_printf(m, ",rsize=%u", fsopt->rsize); |
|
if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
|
seq_printf(m, ",rasize=%u", fsopt->rasize); |
|
if (fsopt->congestion_kb != default_congestion_kb()) |
|
seq_printf(m, ",write_congestion_kb=%u", 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=%u", |
|
fsopt->caps_wanted_delay_min); |
|
if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) |
|
seq_printf(m, ",caps_wanted_delay_max=%u", |
|
fsopt->caps_wanted_delay_max); |
|
if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) |
|
seq_printf(m, ",readdir_max_entries=%u", fsopt->max_readdir); |
|
if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) |
|
seq_printf(m, ",readdir_max_bytes=%u", 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 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; |
|
fsc->filp_gen = 1; |
|
fsc->have_copy_from2 = true; |
|
|
|
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; |
|
|
|
spin_lock(&ceph_fsc_lock); |
|
list_add_tail(&fsc->metric_wakeup, &ceph_fsc_list); |
|
spin_unlock(&ceph_fsc_lock); |
|
|
|
return fsc; |
|
|
|
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); |
|
|
|
spin_lock(&ceph_fsc_lock); |
|
list_del(&fsc->metric_wakeup); |
|
spin_unlock(&ceph_fsc_lock); |
|
|
|
ceph_mdsc_destroy(fsc); |
|
destroy_workqueue(fsc->inode_wq); |
|
destroy_workqueue(fsc->cap_wq); |
|
|
|
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; |
|
struct kmem_cache *ceph_mds_request_cachep; |
|
mempool_t *ceph_wb_pagevec_pool; |
|
|
|
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; |
|
|
|
ceph_mds_request_cachep = KMEM_CACHE(ceph_mds_request, SLAB_MEM_SPREAD); |
|
if (!ceph_mds_request_cachep) |
|
goto bad_mds_req; |
|
|
|
ceph_wb_pagevec_pool = mempool_create_kmalloc_pool(10, CEPH_MAX_WRITE_SIZE >> PAGE_SHIFT); |
|
if (!ceph_wb_pagevec_pool) |
|
goto bad_pagevec_pool; |
|
|
|
error = ceph_fscache_register(); |
|
if (error) |
|
goto bad_fscache; |
|
|
|
return 0; |
|
|
|
bad_fscache: |
|
kmem_cache_destroy(ceph_mds_request_cachep); |
|
bad_pagevec_pool: |
|
mempool_destroy(ceph_wb_pagevec_pool); |
|
bad_mds_req: |
|
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); |
|
kmem_cache_destroy(ceph_mds_request_cachep); |
|
mempool_destroy(ceph_wb_pagevec_pool); |
|
|
|
ceph_fscache_unregister(); |
|
} |
|
|
|
/* |
|
* ceph_umount_begin - initiate forced umount. Tear 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); |
|
fsc->filp_gen++; // invalidate open files |
|
} |
|
|
|
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, |
|
.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, |
|
struct fs_context *fc) |
|
{ |
|
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 = fsc->mount_options->server_path ? |
|
fsc->mount_options->server_path + 1 : ""; |
|
|
|
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, fc); |
|
if (err < 0) |
|
goto out; |
|
} |
|
|
|
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, struct fs_context *fc) |
|
{ |
|
struct ceph_fs_client *fsc = s->s_fs_info; |
|
int ret; |
|
|
|
dout("set_super %p\n", s); |
|
|
|
s->s_maxbytes = MAX_LFS_FILESIZE; |
|
|
|
s->s_xattr = ceph_xattr_handlers; |
|
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; |
|
s->s_time_min = 0; |
|
s->s_time_max = U32_MAX; |
|
|
|
ret = set_anon_super_fc(s, fc); |
|
if (ret != 0) |
|
fsc->sb = NULL; |
|
return ret; |
|
} |
|
|
|
/* |
|
* share superblock if same fs AND options |
|
*/ |
|
static int ceph_compare_super(struct super_block *sb, struct fs_context *fc) |
|
{ |
|
struct ceph_fs_client *new = fc->s_fs_info; |
|
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 (fc->sb_flags != (sb->s_flags & ~SB_BORN)) { |
|
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 int ceph_get_tree(struct fs_context *fc) |
|
{ |
|
struct ceph_parse_opts_ctx *pctx = fc->fs_private; |
|
struct super_block *sb; |
|
struct ceph_fs_client *fsc; |
|
struct dentry *res; |
|
int (*compare_super)(struct super_block *, struct fs_context *) = |
|
ceph_compare_super; |
|
int err; |
|
|
|
dout("ceph_get_tree\n"); |
|
|
|
if (!fc->source) |
|
return invalfc(fc, "No source"); |
|
|
|
/* create client (which we may/may not use) */ |
|
fsc = create_fs_client(pctx->opts, pctx->copts); |
|
pctx->opts = NULL; |
|
pctx->copts = NULL; |
|
if (IS_ERR(fsc)) { |
|
err = PTR_ERR(fsc); |
|
goto out_final; |
|
} |
|
|
|
err = ceph_mdsc_init(fsc); |
|
if (err < 0) |
|
goto out; |
|
|
|
if (ceph_test_opt(fsc->client, NOSHARE)) |
|
compare_super = NULL; |
|
|
|
fc->s_fs_info = fsc; |
|
sb = sget_fc(fc, compare_super, ceph_set_super); |
|
fc->s_fs_info = NULL; |
|
if (IS_ERR(sb)) { |
|
err = PTR_ERR(sb); |
|
goto out; |
|
} |
|
|
|
if (ceph_sb_to_client(sb) != 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) |
|
goto out_splat; |
|
} |
|
|
|
res = ceph_real_mount(fsc, fc); |
|
if (IS_ERR(res)) { |
|
err = PTR_ERR(res); |
|
goto out_splat; |
|
} |
|
dout("root %p inode %p ino %llx.%llx\n", res, |
|
d_inode(res), ceph_vinop(d_inode(res))); |
|
fc->root = fsc->sb->s_root; |
|
return 0; |
|
|
|
out_splat: |
|
if (!ceph_mdsmap_is_cluster_available(fsc->mdsc->mdsmap)) { |
|
pr_info("No mds server is up or the cluster is laggy\n"); |
|
err = -EHOSTUNREACH; |
|
} |
|
|
|
ceph_mdsc_close_sessions(fsc->mdsc); |
|
deactivate_locked_super(sb); |
|
goto out_final; |
|
|
|
out: |
|
destroy_fs_client(fsc); |
|
out_final: |
|
dout("ceph_get_tree fail %d\n", err); |
|
return err; |
|
} |
|
|
|
static void ceph_free_fc(struct fs_context *fc) |
|
{ |
|
struct ceph_parse_opts_ctx *pctx = fc->fs_private; |
|
|
|
if (pctx) { |
|
destroy_mount_options(pctx->opts); |
|
ceph_destroy_options(pctx->copts); |
|
kfree(pctx); |
|
} |
|
} |
|
|
|
static int ceph_reconfigure_fc(struct fs_context *fc) |
|
{ |
|
struct ceph_parse_opts_ctx *pctx = fc->fs_private; |
|
struct ceph_mount_options *fsopt = pctx->opts; |
|
struct ceph_fs_client *fsc = ceph_sb_to_client(fc->root->d_sb); |
|
|
|
if (fsopt->flags & CEPH_MOUNT_OPT_ASYNC_DIROPS) |
|
ceph_set_mount_opt(fsc, ASYNC_DIROPS); |
|
else |
|
ceph_clear_mount_opt(fsc, ASYNC_DIROPS); |
|
|
|
sync_filesystem(fc->root->d_sb); |
|
return 0; |
|
} |
|
|
|
static const struct fs_context_operations ceph_context_ops = { |
|
.free = ceph_free_fc, |
|
.parse_param = ceph_parse_mount_param, |
|
.get_tree = ceph_get_tree, |
|
.reconfigure = ceph_reconfigure_fc, |
|
}; |
|
|
|
/* |
|
* Set up the filesystem mount context. |
|
*/ |
|
static int ceph_init_fs_context(struct fs_context *fc) |
|
{ |
|
struct ceph_parse_opts_ctx *pctx; |
|
struct ceph_mount_options *fsopt; |
|
|
|
pctx = kzalloc(sizeof(*pctx), GFP_KERNEL); |
|
if (!pctx) |
|
return -ENOMEM; |
|
|
|
pctx->copts = ceph_alloc_options(); |
|
if (!pctx->copts) |
|
goto nomem; |
|
|
|
pctx->opts = kzalloc(sizeof(*pctx->opts), GFP_KERNEL); |
|
if (!pctx->opts) |
|
goto nomem; |
|
|
|
fsopt = pctx->opts; |
|
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) |
|
goto nomem; |
|
|
|
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(); |
|
|
|
#ifdef CONFIG_CEPH_FS_POSIX_ACL |
|
fc->sb_flags |= SB_POSIXACL; |
|
#endif |
|
|
|
fc->fs_private = pctx; |
|
fc->ops = &ceph_context_ops; |
|
return 0; |
|
|
|
nomem: |
|
destroy_mount_options(pctx->opts); |
|
ceph_destroy_options(pctx->copts); |
|
kfree(pctx); |
|
return -ENOMEM; |
|
} |
|
|
|
static void ceph_kill_sb(struct super_block *s) |
|
{ |
|
struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
|
|
|
dout("kill_sb %p\n", s); |
|
|
|
ceph_mdsc_pre_umount(fsc->mdsc); |
|
flush_fs_workqueues(fsc); |
|
|
|
kill_anon_super(s); |
|
|
|
fsc->client->extra_mon_dispatch = NULL; |
|
ceph_fs_debugfs_cleanup(fsc); |
|
|
|
ceph_fscache_unregister_fs(fsc); |
|
|
|
destroy_fs_client(fsc); |
|
} |
|
|
|
static struct file_system_type ceph_fs_type = { |
|
.owner = THIS_MODULE, |
|
.name = "ceph", |
|
.init_fs_context = ceph_init_fs_context, |
|
.kill_sb = ceph_kill_sb, |
|
.fs_flags = FS_RENAME_DOES_D_MOVE, |
|
}; |
|
MODULE_ALIAS_FS("ceph"); |
|
|
|
int ceph_force_reconnect(struct super_block *sb) |
|
{ |
|
struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
|
int err = 0; |
|
|
|
ceph_umount_begin(sb); |
|
|
|
/* Make sure all page caches get invalidated. |
|
* see remove_session_caps_cb() */ |
|
flush_workqueue(fsc->inode_wq); |
|
|
|
/* In case that we were blocklisted. This also reset |
|
* all mon/osd connections */ |
|
ceph_reset_client_addr(fsc->client); |
|
|
|
ceph_osdc_clear_abort_err(&fsc->client->osdc); |
|
|
|
fsc->blocklisted = false; |
|
fsc->mount_state = CEPH_MOUNT_MOUNTED; |
|
|
|
if (sb->s_root) { |
|
err = __ceph_do_getattr(d_inode(sb->s_root), NULL, |
|
CEPH_STAT_CAP_INODE, true); |
|
} |
|
return err; |
|
} |
|
|
|
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(); |
|
} |
|
|
|
static int param_set_metrics(const char *val, const struct kernel_param *kp) |
|
{ |
|
struct ceph_fs_client *fsc; |
|
int ret; |
|
|
|
ret = param_set_bool(val, kp); |
|
if (ret) { |
|
pr_err("Failed to parse sending metrics switch value '%s'\n", |
|
val); |
|
return ret; |
|
} else if (!disable_send_metrics) { |
|
// wake up all the mds clients |
|
spin_lock(&ceph_fsc_lock); |
|
list_for_each_entry(fsc, &ceph_fsc_list, metric_wakeup) { |
|
metric_schedule_delayed(&fsc->mdsc->metric); |
|
} |
|
spin_unlock(&ceph_fsc_lock); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct kernel_param_ops param_ops_metrics = { |
|
.set = param_set_metrics, |
|
.get = param_get_bool, |
|
}; |
|
|
|
bool disable_send_metrics = false; |
|
module_param_cb(disable_send_metrics, ¶m_ops_metrics, &disable_send_metrics, 0644); |
|
MODULE_PARM_DESC(disable_send_metrics, "Enable sending perf metrics to ceph cluster (default: on)"); |
|
|
|
module_init(init_ceph); |
|
module_exit(exit_ceph); |
|
|
|
MODULE_AUTHOR("Sage Weil <[email protected]>"); |
|
MODULE_AUTHOR("Yehuda Sadeh <[email protected]>"); |
|
MODULE_AUTHOR("Patience Warnick <[email protected]>"); |
|
MODULE_DESCRIPTION("Ceph filesystem for Linux"); |
|
MODULE_LICENSE("GPL");
|
|
|