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- // SPDX-License-Identifier: GPL-2.0-only
- #include <linux/ceph/ceph_debug.h>
- #include <linux/backing-dev.h>
- #include <linux/ctype.h>
- #include <linux/fs.h>
- #include <linux/inet.h>
- #include <linux/in6.h>
- #include <linux/module.h>
- #include <linux/mount.h>
- #include <linux/fs_context.h>
- #include <linux/fs_parser.h>
- #include <linux/sched.h>
- #include <linux/seq_file.h>
- #include <linux/slab.h>
- #include <linux/statfs.h>
- #include <linux/string.h>
- #include "super.h"
- #include "mds_client.h"
- #include "cache.h"
- #include <linux/ceph/ceph_features.h>
- #include <linux/ceph/decode.h>
- #include <linux/ceph/mon_client.h>
- #include <linux/ceph/auth.h>
- #include <linux/ceph/debugfs.h>
- #include <uapi/linux/magic.h>
- static DEFINE_SPINLOCK(ceph_fsc_lock);
- static LIST_HEAD(ceph_fsc_list);
- /*
- * Ceph superblock operations
- *
- * Handle the basics of mounting, unmounting.
- */
- /*
- * super ops
- */
- static void ceph_put_super(struct super_block *s)
- {
- struct ceph_fs_client *fsc = ceph_sb_to_client(s);
- dout("put_super\n");
- ceph_mdsc_close_sessions(fsc->mdsc);
- }
- static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
- {
- struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry));
- struct ceph_mon_client *monc = &fsc->client->monc;
- struct ceph_statfs st;
- int i, err;
- u64 data_pool;
- if (fsc->mdsc->mdsmap->m_num_data_pg_pools == 1) {
- data_pool = fsc->mdsc->mdsmap->m_data_pg_pools[0];
- } else {
- data_pool = CEPH_NOPOOL;
- }
- dout("statfs\n");
- err = ceph_monc_do_statfs(monc, data_pool, &st);
- if (err < 0)
- return err;
- /* fill in kstatfs */
- buf->f_type = CEPH_SUPER_MAGIC; /* ?? */
- /*
- * Express utilization in terms of large blocks to avoid
- * overflow on 32-bit machines.
- */
- buf->f_frsize = 1 << CEPH_BLOCK_SHIFT;
- /*
- * By default use root quota for stats; fallback to overall filesystem
- * usage if using 'noquotadf' mount option or if the root dir doesn't
- * have max_bytes quota set.
- */
- if (ceph_test_mount_opt(fsc, NOQUOTADF) ||
- !ceph_quota_update_statfs(fsc, buf)) {
- buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
- buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
- buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
- }
- /*
- * NOTE: for the time being, we make bsize == frsize to humor
- * not-yet-ancient versions of glibc that are broken.
- * Someday, we will probably want to report a real block
- * size... whatever that may mean for a network file system!
- */
- buf->f_bsize = buf->f_frsize;
- buf->f_files = le64_to_cpu(st.num_objects);
- buf->f_ffree = -1;
- buf->f_namelen = NAME_MAX;
- /* Must convert the fsid, for consistent values across arches */
- buf->f_fsid.val[0] = 0;
- mutex_lock(&monc->mutex);
- for (i = 0 ; i < sizeof(monc->monmap->fsid) / sizeof(__le32) ; ++i)
- buf->f_fsid.val[0] ^= le32_to_cpu(((__le32 *)&monc->monmap->fsid)[i]);
- mutex_unlock(&monc->mutex);
- /* fold the fs_cluster_id into the upper bits */
- buf->f_fsid.val[1] = monc->fs_cluster_id;
- return 0;
- }
- static int ceph_sync_fs(struct super_block *sb, int wait)
- {
- struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
- if (!wait) {
- dout("sync_fs (non-blocking)\n");
- ceph_flush_dirty_caps(fsc->mdsc);
- dout("sync_fs (non-blocking) done\n");
- return 0;
- }
- dout("sync_fs (blocking)\n");
- ceph_osdc_sync(&fsc->client->osdc);
- ceph_mdsc_sync(fsc->mdsc);
- dout("sync_fs (blocking) done\n");
- return 0;
- }
- /*
- * mount options
- */
- enum {
- Opt_wsize,
- Opt_rsize,
- Opt_rasize,
- Opt_caps_wanted_delay_min,
- Opt_caps_wanted_delay_max,
- Opt_caps_max,
- Opt_readdir_max_entries,
- Opt_readdir_max_bytes,
- Opt_congestion_kb,
- /* int args above */
- Opt_snapdirname,
- Opt_mds_namespace,
- Opt_recover_session,
- Opt_source,
- Opt_mon_addr,
- /* string args above */
- Opt_dirstat,
- Opt_rbytes,
- Opt_asyncreaddir,
- Opt_dcache,
- Opt_ino32,
- Opt_fscache,
- Opt_poolperm,
- Opt_require_active_mds,
- Opt_acl,
- Opt_quotadf,
- Opt_copyfrom,
- Opt_wsync,
- Opt_pagecache,
- };
- enum ceph_recover_session_mode {
- ceph_recover_session_no,
- ceph_recover_session_clean
- };
- static const struct constant_table ceph_param_recover[] = {
- { "no", ceph_recover_session_no },
- { "clean", ceph_recover_session_clean },
- {}
- };
- static const struct fs_parameter_spec ceph_mount_parameters[] = {
- fsparam_flag_no ("acl", Opt_acl),
- fsparam_flag_no ("asyncreaddir", Opt_asyncreaddir),
- fsparam_s32 ("caps_max", Opt_caps_max),
- fsparam_u32 ("caps_wanted_delay_max", Opt_caps_wanted_delay_max),
- fsparam_u32 ("caps_wanted_delay_min", Opt_caps_wanted_delay_min),
- fsparam_u32 ("write_congestion_kb", Opt_congestion_kb),
- fsparam_flag_no ("copyfrom", Opt_copyfrom),
- fsparam_flag_no ("dcache", Opt_dcache),
- fsparam_flag_no ("dirstat", Opt_dirstat),
- fsparam_flag_no ("fsc", Opt_fscache), // fsc|nofsc
- fsparam_string ("fsc", Opt_fscache), // fsc=...
- fsparam_flag_no ("ino32", Opt_ino32),
- fsparam_string ("mds_namespace", Opt_mds_namespace),
- fsparam_flag_no ("poolperm", Opt_poolperm),
- fsparam_flag_no ("quotadf", Opt_quotadf),
- fsparam_u32 ("rasize", Opt_rasize),
- fsparam_flag_no ("rbytes", Opt_rbytes),
- fsparam_u32 ("readdir_max_bytes", Opt_readdir_max_bytes),
- fsparam_u32 ("readdir_max_entries", Opt_readdir_max_entries),
- fsparam_enum ("recover_session", Opt_recover_session, ceph_param_recover),
- fsparam_flag_no ("require_active_mds", Opt_require_active_mds),
- fsparam_u32 ("rsize", Opt_rsize),
- fsparam_string ("snapdirname", Opt_snapdirname),
- fsparam_string ("source", Opt_source),
- fsparam_string ("mon_addr", Opt_mon_addr),
- fsparam_u32 ("wsize", Opt_wsize),
- fsparam_flag_no ("wsync", Opt_wsync),
- fsparam_flag_no ("pagecache", Opt_pagecache),
- {}
- };
- struct ceph_parse_opts_ctx {
- struct ceph_options *copts;
- struct ceph_mount_options *opts;
- };
- /*
- * Remove adjacent slashes and then the trailing slash, unless it is
- * the only remaining character.
- *
- * E.g. "//dir1////dir2///" --> "/dir1/dir2", "///" --> "/".
- */
- static void canonicalize_path(char *path)
- {
- int i, j = 0;
- for (i = 0; path[i] != '\0'; i++) {
- if (path[i] != '/' || j < 1 || path[j - 1] != '/')
- path[j++] = path[i];
- }
- if (j > 1 && path[j - 1] == '/')
- j--;
- path[j] = '\0';
- }
- /*
- * Check if the mds namespace in ceph_mount_options matches
- * the passed in namespace string. First time match (when
- * ->mds_namespace is NULL) is treated specially, since
- * ->mds_namespace needs to be initialized by the caller.
- */
- static int namespace_equals(struct ceph_mount_options *fsopt,
- const char *namespace, size_t len)
- {
- return !(fsopt->mds_namespace &&
- (strlen(fsopt->mds_namespace) != len ||
- strncmp(fsopt->mds_namespace, namespace, len)));
- }
- static int ceph_parse_old_source(const char *dev_name, const char *dev_name_end,
- struct fs_context *fc)
- {
- int r;
- struct ceph_parse_opts_ctx *pctx = fc->fs_private;
- struct ceph_mount_options *fsopt = pctx->opts;
- if (*dev_name_end != ':')
- return invalfc(fc, "separator ':' missing in source");
- r = ceph_parse_mon_ips(dev_name, dev_name_end - dev_name,
- pctx->copts, fc->log.log, ',');
- if (r)
- return r;
- fsopt->new_dev_syntax = false;
- return 0;
- }
- static int ceph_parse_new_source(const char *dev_name, const char *dev_name_end,
- struct fs_context *fc)
- {
- size_t len;
- struct ceph_fsid fsid;
- struct ceph_parse_opts_ctx *pctx = fc->fs_private;
- struct ceph_mount_options *fsopt = pctx->opts;
- char *fsid_start, *fs_name_start;
- if (*dev_name_end != '=') {
- dout("separator '=' missing in source");
- return -EINVAL;
- }
- fsid_start = strchr(dev_name, '@');
- if (!fsid_start)
- return invalfc(fc, "missing cluster fsid");
- ++fsid_start; /* start of cluster fsid */
- fs_name_start = strchr(fsid_start, '.');
- if (!fs_name_start)
- return invalfc(fc, "missing file system name");
- if (ceph_parse_fsid(fsid_start, &fsid))
- return invalfc(fc, "Invalid FSID");
- ++fs_name_start; /* start of file system name */
- len = dev_name_end - fs_name_start;
- if (!namespace_equals(fsopt, fs_name_start, len))
- return invalfc(fc, "Mismatching mds_namespace");
- kfree(fsopt->mds_namespace);
- fsopt->mds_namespace = kstrndup(fs_name_start, len, GFP_KERNEL);
- if (!fsopt->mds_namespace)
- return -ENOMEM;
- dout("file system (mds namespace) '%s'\n", fsopt->mds_namespace);
- fsopt->new_dev_syntax = true;
- return 0;
- }
- /*
- * Parse the source parameter for new device format. Distinguish the device
- * spec from the path. Try parsing new device format and fallback to old
- * format if needed.
- *
- * New device syntax will looks like:
- * <device_spec>=/<path>
- * where
- * <device_spec> is [email protected]
- * <path> is optional, but if present must begin with '/'
- * (monitor addresses are passed via mount option)
- *
- * Old device syntax is:
- * <server_spec>[,<server_spec>...]:[<path>]
- * where
- * <server_spec> is <ip>[:<port>]
- * <path> is optional, but if present must begin with '/'
- */
- static int ceph_parse_source(struct fs_parameter *param, struct fs_context *fc)
- {
- struct ceph_parse_opts_ctx *pctx = fc->fs_private;
- struct ceph_mount_options *fsopt = pctx->opts;
- char *dev_name = param->string, *dev_name_end;
- int ret;
- dout("%s '%s'\n", __func__, dev_name);
- if (!dev_name || !*dev_name)
- return invalfc(fc, "Empty source");
- dev_name_end = strchr(dev_name, '/');
- if (dev_name_end) {
- /*
- * The server_path will include the whole chars from userland
- * including the leading '/'.
- */
- kfree(fsopt->server_path);
- fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL);
- if (!fsopt->server_path)
- return -ENOMEM;
- canonicalize_path(fsopt->server_path);
- } else {
- dev_name_end = dev_name + strlen(dev_name);
- }
- dev_name_end--; /* back up to separator */
- if (dev_name_end < dev_name)
- return invalfc(fc, "Path missing in source");
- 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);
- dout("trying new device syntax");
- ret = ceph_parse_new_source(dev_name, dev_name_end, fc);
- if (ret) {
- if (ret != -EINVAL)
- return ret;
- dout("trying old device syntax");
- ret = ceph_parse_old_source(dev_name, dev_name_end, fc);
- if (ret)
- return ret;
- }
- fc->source = param->string;
- param->string = NULL;
- return 0;
- }
- static int ceph_parse_mon_addr(struct fs_parameter *param,
- struct fs_context *fc)
- {
- struct ceph_parse_opts_ctx *pctx = fc->fs_private;
- struct ceph_mount_options *fsopt = pctx->opts;
- kfree(fsopt->mon_addr);
- fsopt->mon_addr = param->string;
- param->string = NULL;
- return ceph_parse_mon_ips(fsopt->mon_addr, strlen(fsopt->mon_addr),
- pctx->copts, fc->log.log, '/');
- }
- static int ceph_parse_mount_param(struct fs_context *fc,
- struct fs_parameter *param)
- {
- struct ceph_parse_opts_ctx *pctx = fc->fs_private;
- struct ceph_mount_options *fsopt = pctx->opts;
- struct fs_parse_result result;
- unsigned int mode;
- int token, ret;
- ret = ceph_parse_param(param, pctx->copts, fc->log.log);
- if (ret != -ENOPARAM)
- return ret;
- token = fs_parse(fc, ceph_mount_parameters, param, &result);
- dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
- if (token < 0)
- return token;
- switch (token) {
- case Opt_snapdirname:
- kfree(fsopt->snapdir_name);
- fsopt->snapdir_name = param->string;
- param->string = NULL;
- break;
- case Opt_mds_namespace:
- if (!namespace_equals(fsopt, param->string, strlen(param->string)))
- return invalfc(fc, "Mismatching mds_namespace");
- kfree(fsopt->mds_namespace);
- fsopt->mds_namespace = param->string;
- param->string = NULL;
- break;
- case Opt_recover_session:
- mode = result.uint_32;
- if (mode == ceph_recover_session_no)
- fsopt->flags &= ~CEPH_MOUNT_OPT_CLEANRECOVER;
- else if (mode == ceph_recover_session_clean)
- fsopt->flags |= CEPH_MOUNT_OPT_CLEANRECOVER;
- else
- BUG();
- break;
- case Opt_source:
- if (fc->source)
- return invalfc(fc, "Multiple sources specified");
- return ceph_parse_source(param, fc);
- case Opt_mon_addr:
- return ceph_parse_mon_addr(param, fc);
- case Opt_wsize:
- if (result.uint_32 < PAGE_SIZE ||
- result.uint_32 > CEPH_MAX_WRITE_SIZE)
- goto out_of_range;
- fsopt->wsize = ALIGN(result.uint_32, PAGE_SIZE);
- break;
- case Opt_rsize:
- if (result.uint_32 < PAGE_SIZE ||
- result.uint_32 > CEPH_MAX_READ_SIZE)
- goto out_of_range;
- fsopt->rsize = ALIGN(result.uint_32, PAGE_SIZE);
- break;
- case Opt_rasize:
- fsopt->rasize = ALIGN(result.uint_32, PAGE_SIZE);
- break;
- case Opt_caps_wanted_delay_min:
- if (result.uint_32 < 1)
- goto out_of_range;
- fsopt->caps_wanted_delay_min = result.uint_32;
- break;
- case Opt_caps_wanted_delay_max:
- if (result.uint_32 < 1)
- goto out_of_range;
- fsopt->caps_wanted_delay_max = result.uint_32;
- break;
- case Opt_caps_max:
- if (result.int_32 < 0)
- goto out_of_range;
- fsopt->caps_max = result.int_32;
- break;
- case Opt_readdir_max_entries:
- if (result.uint_32 < 1)
- goto out_of_range;
- fsopt->max_readdir = result.uint_32;
- break;
- case Opt_readdir_max_bytes:
- if (result.uint_32 < PAGE_SIZE && result.uint_32 != 0)
- goto out_of_range;
- fsopt->max_readdir_bytes = result.uint_32;
- break;
- case Opt_congestion_kb:
- if (result.uint_32 < 1024) /* at least 1M */
- goto out_of_range;
- fsopt->congestion_kb = result.uint_32;
- break;
- case Opt_dirstat:
- if (!result.negated)
- fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT;
- else
- fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT;
- break;
- case Opt_rbytes:
- if (!result.negated)
- fsopt->flags |= CEPH_MOUNT_OPT_RBYTES;
- else
- fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES;
- break;
- case Opt_asyncreaddir:
- if (!result.negated)
- fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR;
- else
- fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
- break;
- case Opt_dcache:
- if (!result.negated)
- fsopt->flags |= CEPH_MOUNT_OPT_DCACHE;
- else
- fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE;
- break;
- case Opt_ino32:
- if (!result.negated)
- fsopt->flags |= CEPH_MOUNT_OPT_INO32;
- else
- fsopt->flags &= ~CEPH_MOUNT_OPT_INO32;
- break;
- case Opt_fscache:
- #ifdef CONFIG_CEPH_FSCACHE
- kfree(fsopt->fscache_uniq);
- fsopt->fscache_uniq = NULL;
- if (result.negated) {
- fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE;
- } else {
- fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE;
- fsopt->fscache_uniq = param->string;
- param->string = NULL;
- }
- break;
- #else
- return invalfc(fc, "fscache support is disabled");
- #endif
- case Opt_poolperm:
- if (!result.negated)
- fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM;
- else
- fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM;
- break;
- case Opt_require_active_mds:
- if (!result.negated)
- fsopt->flags &= ~CEPH_MOUNT_OPT_MOUNTWAIT;
- else
- fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT;
- break;
- case Opt_quotadf:
- if (!result.negated)
- fsopt->flags &= ~CEPH_MOUNT_OPT_NOQUOTADF;
- else
- fsopt->flags |= CEPH_MOUNT_OPT_NOQUOTADF;
- break;
- case Opt_copyfrom:
- if (!result.negated)
- fsopt->flags &= ~CEPH_MOUNT_OPT_NOCOPYFROM;
- else
- fsopt->flags |= CEPH_MOUNT_OPT_NOCOPYFROM;
- break;
- case Opt_acl:
- if (!result.negated) {
- #ifdef CONFIG_CEPH_FS_POSIX_ACL
- fc->sb_flags |= SB_POSIXACL;
- #else
- return invalfc(fc, "POSIX ACL support is disabled");
- #endif
- } else {
- fc->sb_flags &= ~SB_POSIXACL;
- }
- break;
- case Opt_wsync:
- if (!result.negated)
- fsopt->flags &= ~CEPH_MOUNT_OPT_ASYNC_DIROPS;
- else
- fsopt->flags |= CEPH_MOUNT_OPT_ASYNC_DIROPS;
- break;
- case Opt_pagecache:
- if (result.negated)
- fsopt->flags |= CEPH_MOUNT_OPT_NOPAGECACHE;
- else
- fsopt->flags &= ~CEPH_MOUNT_OPT_NOPAGECACHE;
- break;
- default:
- BUG();
- }
- return 0;
- out_of_range:
- return invalfc(fc, "%s out of range", param->key);
- }
- static void destroy_mount_options(struct ceph_mount_options *args)
- {
- dout("destroy_mount_options %p\n", args);
- if (!args)
- return;
- kfree(args->snapdir_name);
- kfree(args->mds_namespace);
- kfree(args->server_path);
- kfree(args->fscache_uniq);
- kfree(args->mon_addr);
- kfree(args);
- }
- static int strcmp_null(const char *s1, const char *s2)
- {
- if (!s1 && !s2)
- return 0;
- 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;
- ret = strcmp_null(fsopt1->mon_addr, fsopt2->mon_addr);
- if (ret)
- return ret;
- return ceph_compare_options(new_opt, fsc->client);
- }
- /**
- * 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 (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");
- /* dump mds_namespace when old device syntax is in use */
- if (fsopt->mds_namespace && !fsopt->new_dev_syntax)
- seq_show_option(m, "mds_namespace", fsopt->mds_namespace);
- if (fsopt->mon_addr)
- seq_printf(m, ",mon_addr=%s", fsopt->mon_addr);
- 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, ",wsync");
- if (fsopt->flags & CEPH_MOUNT_OPT_NOPAGECACHE)
- seq_puts(m, ",nopagecache");
- 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);
- fsc->write_congested = false;
- 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;
- hash_init(fsc->async_unlink_conflict);
- spin_lock_init(&fsc->async_unlink_conflict_lock);
- 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_snap_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->netfs.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_snap_cachep = KMEM_CACHE(ceph_cap_snap, SLAB_MEM_SPREAD);
- if (!ceph_cap_snap_cachep)
- goto bad_cap_snap;
- 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;
- return 0;
- bad_pagevec_pool:
- kmem_cache_destroy(ceph_mds_request_cachep);
- 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_snap_cachep);
- bad_cap_snap:
- 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_snap_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);
- }
- static void __ceph_umount_begin(struct ceph_fs_client *fsc)
- {
- ceph_osdc_abort_requests(&fsc->client->osdc, -EIO);
- ceph_mdsc_force_umount(fsc->mdsc);
- fsc->filp_gen++; // invalidate open files
- }
- /*
- * ceph_umount_begin - initiate forced umount. Tear down the
- * mount, skipping steps that may hang while waiting for server(s).
- */
- 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_umount_begin(fsc);
- }
- 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;
- s->s_flags |= SB_NODIRATIME | SB_NOATIME;
- 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 *fsc = ceph_sb_to_client(sb);
- dout("ceph_compare_super %p\n", sb);
- if (compare_mount_options(fsopt, opt, fsc)) {
- dout("monitor(s)/mount options don't match\n");
- return 0;
- }
- if ((opt->flags & CEPH_OPT_FSID) &&
- ceph_fsid_compare(&opt->fsid, &fsc->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;
- }
- if (fsc->blocklisted && !ceph_test_mount_opt(fsc, CLEANRECOVER)) {
- dout("client is blocklisted (and CLEANRECOVER is not set)\n");
- return 0;
- }
- if (fsc->mount_state == CEPH_MOUNT_SHUTDOWN) {
- dout("client has been forcibly unmounted\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 ceph_mount_options *fsopt = pctx->opts;
- 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");
- if (fsopt->new_dev_syntax && !fsopt->mon_addr)
- return invalfc(fc, "No monitor address");
- /* 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);
- if (strcmp_null(fsc->mount_options->mon_addr, fsopt->mon_addr)) {
- kfree(fsc->mount_options->mon_addr);
- fsc->mount_options->mon_addr = fsopt->mon_addr;
- fsopt->mon_addr = NULL;
- pr_notice("ceph: monitor addresses recorded, but not used for reconnection");
- }
- 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;
- }
- /*
- * Return true if it successfully increases the blocker counter,
- * or false if the mdsc is in stopping and flushed state.
- */
- static bool __inc_stopping_blocker(struct ceph_mds_client *mdsc)
- {
- spin_lock(&mdsc->stopping_lock);
- if (mdsc->stopping >= CEPH_MDSC_STOPPING_FLUSHING) {
- spin_unlock(&mdsc->stopping_lock);
- return false;
- }
- atomic_inc(&mdsc->stopping_blockers);
- spin_unlock(&mdsc->stopping_lock);
- return true;
- }
- static void __dec_stopping_blocker(struct ceph_mds_client *mdsc)
- {
- spin_lock(&mdsc->stopping_lock);
- if (!atomic_dec_return(&mdsc->stopping_blockers) &&
- mdsc->stopping >= CEPH_MDSC_STOPPING_FLUSHING)
- complete_all(&mdsc->stopping_waiter);
- spin_unlock(&mdsc->stopping_lock);
- }
- /* For metadata IO requests */
- bool ceph_inc_mds_stopping_blocker(struct ceph_mds_client *mdsc,
- struct ceph_mds_session *session)
- {
- mutex_lock(&session->s_mutex);
- inc_session_sequence(session);
- mutex_unlock(&session->s_mutex);
- return __inc_stopping_blocker(mdsc);
- }
- void ceph_dec_mds_stopping_blocker(struct ceph_mds_client *mdsc)
- {
- __dec_stopping_blocker(mdsc);
- }
- static void ceph_kill_sb(struct super_block *s)
- {
- struct ceph_fs_client *fsc = ceph_sb_to_client(s);
- struct ceph_mds_client *mdsc = fsc->mdsc;
- bool wait;
- dout("kill_sb %p\n", s);
- ceph_mdsc_pre_umount(mdsc);
- flush_fs_workqueues(fsc);
- /*
- * Though the kill_anon_super() will finally trigger the
- * sync_filesystem() anyway, we still need to do it here and
- * then bump the stage of shutdown. This will allow us to
- * drop any further message, which will increase the inodes'
- * i_count reference counters but makes no sense any more,
- * from MDSs.
- *
- * Without this when evicting the inodes it may fail in the
- * kill_anon_super(), which will trigger a warning when
- * destroying the fscrypt keyring and then possibly trigger
- * a further crash in ceph module when the iput() tries to
- * evict the inodes later.
- */
- sync_filesystem(s);
- spin_lock(&mdsc->stopping_lock);
- mdsc->stopping = CEPH_MDSC_STOPPING_FLUSHING;
- wait = !!atomic_read(&mdsc->stopping_blockers);
- spin_unlock(&mdsc->stopping_lock);
- if (wait && atomic_read(&mdsc->stopping_blockers)) {
- long timeleft = wait_for_completion_killable_timeout(
- &mdsc->stopping_waiter,
- fsc->client->options->mount_timeout);
- if (!timeleft) /* timed out */
- pr_warn("umount timed out, %ld\n", timeleft);
- else if (timeleft < 0) /* killed */
- pr_warn("umount was killed, %ld\n", timeleft);
- }
- mdsc->stopping = CEPH_MDSC_STOPPING_FLUSHED;
- 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;
- fsc->mount_state = CEPH_MOUNT_RECOVER;
- __ceph_umount_begin(fsc);
- /* 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)");
- /* for both v1 and v2 syntax */
- static bool mount_support = true;
- static const struct kernel_param_ops param_ops_mount_syntax = {
- .get = param_get_bool,
- };
- module_param_cb(mount_syntax_v1, ¶m_ops_mount_syntax, &mount_support, 0444);
- module_param_cb(mount_syntax_v2, ¶m_ops_mount_syntax, &mount_support, 0444);
- 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");
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