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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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 "crypto.h"#include "subvolume_metrics.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>
#define CREATE_TRACE_POINTS#include <trace/events/ceph.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_fs_client(s);
doutc(fsc->client, "begin\n"); ceph_fscrypt_free_dummy_policy(fsc); ceph_mdsc_close_sessions(fsc->mdsc); doutc(fsc->client, "done\n");}
static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf){ struct ceph_fs_client *fsc = ceph_inode_to_fs_client(d_inode(dentry)); struct ceph_mon_client *monc = &fsc->client->monc; struct ceph_statfs st; int i, err; u64 data_pool;
doutc(fsc->client, "begin\n"); 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; }
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;
doutc(fsc->client, "done\n"); return 0;}
static int ceph_sync_fs(struct super_block *sb, int wait){ struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb); struct ceph_client *cl = fsc->client;
if (!wait) { doutc(cl, "(non-blocking)\n"); ceph_flush_dirty_caps(fsc->mdsc); ceph_flush_cap_releases(fsc->mdsc); doutc(cl, "(non-blocking) done\n"); return 0; }
doutc(cl, "(blocking)\n"); ceph_osdc_sync(&fsc->client->osdc); ceph_mdsc_sync(fsc->mdsc); doutc(cl, "(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, Opt_test_dummy_encryption, /* 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, Opt_sparseread,};
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_string ("mon_addr", Opt_mon_addr), 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_flag ("test_dummy_encryption", Opt_test_dummy_encryption), fsparam_string ("test_dummy_encryption", Opt_test_dummy_encryption), fsparam_u32 ("wsize", Opt_wsize), fsparam_flag_no ("wsync", Opt_wsync), fsparam_flag_no ("pagecache", Opt_pagecache), fsparam_flag_no ("sparseread", Opt_sparseread), {}};
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';}
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_options *opts = pctx->copts; struct ceph_mount_options *fsopt = pctx->opts; const char *name_start = dev_name; const 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"); len = fsid_start - name_start; kfree(opts->name); opts->name = kstrndup(name_start, len, GFP_KERNEL); if (!opts->name) return -ENOMEM; dout("using %s entity name", opts->name);
++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 name@fsid.fsname * <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'\n", 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: if (strlen(param->string) > NAME_MAX) return invalfc(fc, "snapdirname too long"); 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; case Opt_sparseread: if (result.negated) fsopt->flags &= ~CEPH_MOUNT_OPT_SPARSEREAD; else fsopt->flags |= CEPH_MOUNT_OPT_SPARSEREAD; break; case Opt_test_dummy_encryption:#ifdef CONFIG_FS_ENCRYPTION fscrypt_free_dummy_policy(&fsopt->dummy_enc_policy); ret = fscrypt_parse_test_dummy_encryption(param, &fsopt->dummy_enc_policy); if (ret == -EINVAL) { warnfc(fc, "Value of option \"%s\" is unrecognized", param->key); } else if (ret == -EEXIST) { warnfc(fc, "Conflicting test_dummy_encryption options"); ret = -EINVAL; }#else warnfc(fc, "FS encryption not supported: test_dummy_encryption mount option ignored");#endif 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); fscrypt_free_dummy_policy(&args->dummy_enc_policy); 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_fs_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->flags & CEPH_MOUNT_OPT_SPARSEREAD) seq_puts(m, ",sparseread");
fscrypt_show_test_dummy_encryption(m, ',', root->d_sb);
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_obj(*fsc); 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", WQ_PERCPU, 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){ doutc(fsc->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("%s: %p done\n", __func__, 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_ACCOUNT, ceph_inode_init_once); if (!ceph_inode_cachep) return -ENOMEM;
ceph_cap_cachep = KMEM_CACHE(ceph_cap, 0); if (!ceph_cap_cachep) goto bad_cap; ceph_cap_snap_cachep = KMEM_CACHE(ceph_cap_snap, 0); if (!ceph_cap_snap_cachep) goto bad_cap_snap; ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush, SLAB_RECLAIM_ACCOUNT); if (!ceph_cap_flush_cachep) goto bad_cap_flush;
ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, SLAB_RECLAIM_ACCOUNT); if (!ceph_dentry_cachep) goto bad_dentry;
ceph_file_cachep = KMEM_CACHE(ceph_file_info, 0); if (!ceph_file_cachep) goto bad_file;
ceph_dir_file_cachep = KMEM_CACHE(ceph_dir_file_info, 0); if (!ceph_dir_file_cachep) goto bad_dir_file;
ceph_mds_request_cachep = KMEM_CACHE(ceph_mds_request, 0); if (!ceph_mds_request_cachep) goto bad_mds_req;
ceph_wb_pagevec_pool = mempool_create_kmalloc_pool(10, (CEPH_MAX_WRITE_SIZE >> PAGE_SHIFT) * sizeof(struct page *)); if (!ceph_wb_pagevec_pool) goto bad_pagevec_pool;
error = ceph_subvolume_metrics_cache_init(); if (error) goto bad_subvol_metrics;
return 0;
bad_subvol_metrics: mempool_destroy(ceph_wb_pagevec_pool);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); ceph_subvolume_metrics_cache_destroy();}
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_fs_client(sb);
doutc(fsc->client, "starting forced umount\n");
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 = inode_just_drop, .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_client *cl = fsc->client; struct ceph_mds_client *mdsc = fsc->mdsc; struct ceph_mds_request *req = NULL; int err; struct dentry *root;
/* open dir */ doutc(cl, "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; doutc(cl, "success\n"); root = d_make_root(inode); if (!root) { root = ERR_PTR(-ENOMEM); goto out; } doutc(cl, "success, root dentry is %p\n", root); } else { root = ERR_PTR(err); }out: ceph_mdsc_put_request(req); return root;}
#ifdef CONFIG_FS_ENCRYPTIONstatic int ceph_apply_test_dummy_encryption(struct super_block *sb, struct fs_context *fc, struct ceph_mount_options *fsopt){ struct ceph_fs_client *fsc = sb->s_fs_info;
if (!fscrypt_is_dummy_policy_set(&fsopt->dummy_enc_policy)) return 0;
/* No changing encryption context on remount. */ if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE && !fscrypt_is_dummy_policy_set(&fsc->fsc_dummy_enc_policy)) { if (fscrypt_dummy_policies_equal(&fsopt->dummy_enc_policy, &fsc->fsc_dummy_enc_policy)) return 0; errorfc(fc, "Can't set test_dummy_encryption on remount"); return -EINVAL; }
/* Also make sure fsopt doesn't contain a conflicting value. */ if (fscrypt_is_dummy_policy_set(&fsc->fsc_dummy_enc_policy)) { if (fscrypt_dummy_policies_equal(&fsopt->dummy_enc_policy, &fsc->fsc_dummy_enc_policy)) return 0; errorfc(fc, "Conflicting test_dummy_encryption options"); return -EINVAL; }
fsc->fsc_dummy_enc_policy = fsopt->dummy_enc_policy; memset(&fsopt->dummy_enc_policy, 0, sizeof(fsopt->dummy_enc_policy));
warnfc(fc, "test_dummy_encryption mode enabled"); return 0;}#elsestatic int ceph_apply_test_dummy_encryption(struct super_block *sb, struct fs_context *fc, struct ceph_mount_options *fsopt){ return 0;}#endif
/* * mount: join the ceph cluster, and open root directory. */static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, struct fs_context *fc){ struct ceph_client *cl = fsc->client; int err; unsigned long started = jiffies; /* note the start time */ struct dentry *root;
doutc(cl, "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); 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; }
err = ceph_apply_test_dummy_encryption(fsc->sb, fc, fsc->mount_options); if (err) goto out;
doutc(cl, "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; doutc(cl, "mount success\n"); mutex_unlock(&fsc->client->mount_mutex); return root;
out: mutex_unlock(&fsc->client->mount_mutex); ceph_fscrypt_free_dummy_policy(fsc); 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; struct ceph_client *cl = fsc->client; int ret;
doutc(cl, "%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; set_default_d_op(s, &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; s->s_magic = CEPH_SUPER_MAGIC;
ceph_fscrypt_set_ops(s);
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_fs_client(sb); struct ceph_client *cl = fsc->client;
doutc(cl, "%p\n", sb);
if (compare_mount_options(fsopt, opt, fsc)) { doutc(cl, "monitor(s)/mount options don't match\n"); return 0; } if ((opt->flags & CEPH_OPT_FSID) && ceph_fsid_compare(&opt->fsid, &fsc->client->fsid)) { doutc(cl, "fsid doesn't match\n"); return 0; } if (fc->sb_flags != (sb->s_flags & ~SB_BORN)) { doutc(cl, "flags differ\n"); return 0; }
if (fsc->blocklisted && !ceph_test_mount_opt(fsc, CLEANRECOVER)) { doutc(cl, "client is blocklisted (and CLEANRECOVER is not set)\n"); return 0; }
if (fsc->mount_state == CEPH_MOUNT_SHUTDOWN) { doutc(cl, "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_fs_client(sb) != fsc) { destroy_fs_client(fsc); fsc = ceph_sb_to_fs_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; }
doutc(fsc->client, "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){ int err; struct ceph_parse_opts_ctx *pctx = fc->fs_private; struct ceph_mount_options *fsopt = pctx->opts; struct super_block *sb = fc->root->d_sb; struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb);
err = ceph_apply_test_dummy_encryption(sb, fc, fsopt); if (err) return err;
if (fsopt->flags & CEPH_MOUNT_OPT_ASYNC_DIROPS) ceph_set_mount_opt(fsc, ASYNC_DIROPS); else ceph_clear_mount_opt(fsc, ASYNC_DIROPS);
if (fsopt->flags & CEPH_MOUNT_OPT_SPARSEREAD) ceph_set_mount_opt(fsc, SPARSEREAD); else ceph_clear_mount_opt(fsc, SPARSEREAD);
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_client(fsc->client, "monitor addresses recorded, but not used for reconnection"); }
sync_filesystem(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_obj(*pctx); if (!pctx) return -ENOMEM;
pctx->copts = ceph_alloc_options(); if (!pctx->copts) goto nomem;
pctx->opts = kzalloc_obj(*pctx->opts); 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);}
/* For data IO requests */bool ceph_inc_osd_stopping_blocker(struct ceph_mds_client *mdsc){ return __inc_stopping_blocker(mdsc);}
void ceph_dec_osd_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_fs_client(s); struct ceph_client *cl = fsc->client; struct ceph_mds_client *mdsc = fsc->mdsc; bool wait;
doutc(cl, "%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);
if (atomic64_read(&mdsc->dirty_folios) > 0) { wait_queue_head_t *wq = &mdsc->flush_end_wq; long timeleft = wait_event_killable_timeout(*wq, atomic64_read(&mdsc->dirty_folios) <= 0, fsc->client->options->mount_timeout); if (!timeleft) /* timed out */ pr_warn_client(cl, "umount timed out, %ld\n", timeleft); else if (timeleft < 0) /* killed */ pr_warn_client(cl, "umount was killed, %ld\n", timeleft); }
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_client(cl, "umount timed out, %ld\n", timeleft); else if (timeleft < 0) /* killed */ pr_warn_client(cl, "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 | FS_ALLOW_IDMAP,};MODULE_ALIAS_FS("ceph");
int ceph_force_reconnect(struct super_block *sb){ struct ceph_fs_client *fsc = ceph_sb_to_fs_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);
bool enable_unsafe_idmap = false;module_param(enable_unsafe_idmap, bool, 0644);MODULE_PARM_DESC(enable_unsafe_idmap, "Allow to use idmapped mounts with MDS without CEPHFS_FEATURE_HAS_OWNER_UIDGID");
module_init(init_ceph);module_exit(exit_ceph);
MODULE_AUTHOR("Sage Weil <sage@newdream.net>");MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");MODULE_DESCRIPTION("Ceph filesystem for Linux");MODULE_LICENSE("GPL");