1265 lines
31 KiB
C
1265 lines
31 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/ceph/ceph_debug.h>
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#include <linux/backing-dev.h>
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#include <linux/ctype.h>
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#include <linux/fs.h>
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#include <linux/inet.h>
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#include <linux/in6.h>
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#include <linux/module.h>
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#include <linux/mount.h>
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#include <linux/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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/*
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* Ceph superblock operations
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*
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* Handle the basics of mounting, unmounting.
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*/
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/*
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* super ops
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*/
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static void ceph_put_super(struct super_block *s)
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{
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struct ceph_fs_client *fsc = ceph_sb_to_client(s);
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dout("put_super\n");
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ceph_mdsc_close_sessions(fsc->mdsc);
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}
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static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
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{
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struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry));
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struct ceph_mon_client *monc = &fsc->client->monc;
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struct ceph_statfs st;
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u64 fsid;
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int err;
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u64 data_pool;
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if (fsc->mdsc->mdsmap->m_num_data_pg_pools == 1) {
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data_pool = fsc->mdsc->mdsmap->m_data_pg_pools[0];
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} else {
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data_pool = CEPH_NOPOOL;
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}
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dout("statfs\n");
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err = ceph_monc_do_statfs(monc, data_pool, &st);
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if (err < 0)
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return err;
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/* fill in kstatfs */
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buf->f_type = CEPH_SUPER_MAGIC; /* ?? */
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/*
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* express utilization in terms of large blocks to avoid
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* overflow on 32-bit machines.
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*
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* NOTE: for the time being, we make bsize == frsize to humor
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* not-yet-ancient versions of glibc that are broken.
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* Someday, we will probably want to report a real block
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* size... whatever that may mean for a network file system!
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*/
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buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
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buf->f_frsize = 1 << CEPH_BLOCK_SHIFT;
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/*
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* By default use root quota for stats; fallback to overall filesystem
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* usage if using 'noquotadf' mount option or if the root dir doesn't
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* have max_bytes quota set.
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*/
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if (ceph_test_mount_opt(fsc, NOQUOTADF) ||
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!ceph_quota_update_statfs(fsc, buf)) {
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buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
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buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
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buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
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}
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buf->f_files = le64_to_cpu(st.num_objects);
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buf->f_ffree = -1;
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buf->f_namelen = NAME_MAX;
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/* Must convert the fsid, for consistent values across arches */
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mutex_lock(&monc->mutex);
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fsid = le64_to_cpu(*(__le64 *)(&monc->monmap->fsid)) ^
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le64_to_cpu(*((__le64 *)&monc->monmap->fsid + 1));
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mutex_unlock(&monc->mutex);
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buf->f_fsid.val[0] = fsid & 0xffffffff;
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buf->f_fsid.val[1] = fsid >> 32;
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return 0;
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}
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static int ceph_sync_fs(struct super_block *sb, int wait)
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{
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struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
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if (!wait) {
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dout("sync_fs (non-blocking)\n");
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ceph_flush_dirty_caps(fsc->mdsc);
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dout("sync_fs (non-blocking) done\n");
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return 0;
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}
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dout("sync_fs (blocking)\n");
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ceph_osdc_sync(&fsc->client->osdc);
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ceph_mdsc_sync(fsc->mdsc);
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dout("sync_fs (blocking) done\n");
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return 0;
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}
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/*
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* mount options
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*/
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enum {
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Opt_wsize,
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Opt_rsize,
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Opt_rasize,
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Opt_caps_wanted_delay_min,
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Opt_caps_wanted_delay_max,
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Opt_caps_max,
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Opt_readdir_max_entries,
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Opt_readdir_max_bytes,
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Opt_congestion_kb,
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/* 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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};
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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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{}
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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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default:
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BUG();
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}
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return 0;
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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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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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kfree(args->snapdir_name);
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kfree(args->mds_namespace);
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kfree(args->server_path);
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kfree(args->fscache_uniq);
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kfree(args);
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}
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static int strcmp_null(const char *s1, const char *s2)
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{
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if (!s1 && !s2)
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return 0;
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if (s1 && !s2)
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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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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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|
|
|
ret = memcmp(fsopt1, fsopt2, ofs);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = strcmp_null(fsopt1->server_path, fsopt2->server_path);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = strcmp_null(fsopt1->fscache_uniq, fsopt2->fscache_uniq);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return ceph_compare_options(new_opt, fsc->client);
|
|
}
|
|
|
|
/**
|
|
* 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");
|
|
|
|
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->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 page_count;
|
|
size_t size;
|
|
int err;
|
|
|
|
fsc = kzalloc(sizeof(*fsc), GFP_KERNEL);
|
|
if (!fsc) {
|
|
err = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
fsc->client = ceph_create_client(opt, fsc);
|
|
if (IS_ERR(fsc->client)) {
|
|
err = PTR_ERR(fsc->client);
|
|
goto fail;
|
|
}
|
|
opt = NULL; /* fsc->client now owns this */
|
|
|
|
fsc->client->extra_mon_dispatch = extra_mon_dispatch;
|
|
ceph_set_opt(fsc->client, ABORT_ON_FULL);
|
|
|
|
if (!fsopt->mds_namespace) {
|
|
ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP,
|
|
0, true);
|
|
} else {
|
|
ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_FSMAP,
|
|
0, false);
|
|
}
|
|
|
|
fsc->mount_options = fsopt;
|
|
|
|
fsc->sb = NULL;
|
|
fsc->mount_state = CEPH_MOUNT_MOUNTING;
|
|
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;
|
|
|
|
/* set up mempools */
|
|
err = -ENOMEM;
|
|
page_count = fsc->mount_options->wsize >> PAGE_SHIFT;
|
|
size = sizeof (struct page *) * (page_count ? page_count : 1);
|
|
fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size);
|
|
if (!fsc->wb_pagevec_pool)
|
|
goto fail_cap_wq;
|
|
|
|
return fsc;
|
|
|
|
fail_cap_wq:
|
|
destroy_workqueue(fsc->cap_wq);
|
|
fail_inode_wq:
|
|
destroy_workqueue(fsc->inode_wq);
|
|
fail_client:
|
|
ceph_destroy_client(fsc->client);
|
|
fail:
|
|
kfree(fsc);
|
|
if (opt)
|
|
ceph_destroy_options(opt);
|
|
destroy_mount_options(fsopt);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static void flush_fs_workqueues(struct ceph_fs_client *fsc)
|
|
{
|
|
flush_workqueue(fsc->inode_wq);
|
|
flush_workqueue(fsc->cap_wq);
|
|
}
|
|
|
|
static void destroy_fs_client(struct ceph_fs_client *fsc)
|
|
{
|
|
dout("destroy_fs_client %p\n", fsc);
|
|
|
|
ceph_mdsc_destroy(fsc);
|
|
destroy_workqueue(fsc->inode_wq);
|
|
destroy_workqueue(fsc->cap_wq);
|
|
|
|
mempool_destroy(fsc->wb_pagevec_pool);
|
|
|
|
destroy_mount_options(fsc->mount_options);
|
|
|
|
ceph_destroy_client(fsc->client);
|
|
|
|
kfree(fsc);
|
|
dout("destroy_fs_client %p done\n", fsc);
|
|
}
|
|
|
|
/*
|
|
* caches
|
|
*/
|
|
struct kmem_cache *ceph_inode_cachep;
|
|
struct kmem_cache *ceph_cap_cachep;
|
|
struct kmem_cache *ceph_cap_flush_cachep;
|
|
struct kmem_cache *ceph_dentry_cachep;
|
|
struct kmem_cache *ceph_file_cachep;
|
|
struct kmem_cache *ceph_dir_file_cachep;
|
|
|
|
static void ceph_inode_init_once(void *foo)
|
|
{
|
|
struct ceph_inode_info *ci = foo;
|
|
inode_init_once(&ci->vfs_inode);
|
|
}
|
|
|
|
static int __init init_caches(void)
|
|
{
|
|
int error = -ENOMEM;
|
|
|
|
ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
|
|
sizeof(struct ceph_inode_info),
|
|
__alignof__(struct ceph_inode_info),
|
|
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
|
|
SLAB_ACCOUNT, ceph_inode_init_once);
|
|
if (!ceph_inode_cachep)
|
|
return -ENOMEM;
|
|
|
|
ceph_cap_cachep = KMEM_CACHE(ceph_cap, SLAB_MEM_SPREAD);
|
|
if (!ceph_cap_cachep)
|
|
goto bad_cap;
|
|
ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush,
|
|
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
|
|
if (!ceph_cap_flush_cachep)
|
|
goto bad_cap_flush;
|
|
|
|
ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
|
|
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
|
|
if (!ceph_dentry_cachep)
|
|
goto bad_dentry;
|
|
|
|
ceph_file_cachep = KMEM_CACHE(ceph_file_info, SLAB_MEM_SPREAD);
|
|
if (!ceph_file_cachep)
|
|
goto bad_file;
|
|
|
|
ceph_dir_file_cachep = KMEM_CACHE(ceph_dir_file_info, SLAB_MEM_SPREAD);
|
|
if (!ceph_dir_file_cachep)
|
|
goto bad_dir_file;
|
|
|
|
error = ceph_fscache_register();
|
|
if (error)
|
|
goto bad_fscache;
|
|
|
|
return 0;
|
|
|
|
bad_fscache:
|
|
kmem_cache_destroy(ceph_dir_file_cachep);
|
|
bad_dir_file:
|
|
kmem_cache_destroy(ceph_file_cachep);
|
|
bad_file:
|
|
kmem_cache_destroy(ceph_dentry_cachep);
|
|
bad_dentry:
|
|
kmem_cache_destroy(ceph_cap_flush_cachep);
|
|
bad_cap_flush:
|
|
kmem_cache_destroy(ceph_cap_cachep);
|
|
bad_cap:
|
|
kmem_cache_destroy(ceph_inode_cachep);
|
|
return error;
|
|
}
|
|
|
|
static void destroy_caches(void)
|
|
{
|
|
/*
|
|
* Make sure all delayed rcu free inodes are flushed before we
|
|
* destroy cache.
|
|
*/
|
|
rcu_barrier();
|
|
|
|
kmem_cache_destroy(ceph_inode_cachep);
|
|
kmem_cache_destroy(ceph_cap_cachep);
|
|
kmem_cache_destroy(ceph_cap_flush_cachep);
|
|
kmem_cache_destroy(ceph_dentry_cachep);
|
|
kmem_cache_destroy(ceph_file_cachep);
|
|
kmem_cache_destroy(ceph_dir_file_cachep);
|
|
|
|
ceph_fscache_unregister();
|
|
}
|
|
|
|
/*
|
|
* ceph_umount_begin - initiate forced umount. Tear down down the
|
|
* mount, skipping steps that may hang while waiting for server(s).
|
|
*/
|
|
static void ceph_umount_begin(struct super_block *sb)
|
|
{
|
|
struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
|
|
|
|
dout("ceph_umount_begin - starting forced umount\n");
|
|
if (!fsc)
|
|
return;
|
|
fsc->mount_state = CEPH_MOUNT_SHUTDOWN;
|
|
ceph_osdc_abort_requests(&fsc->client->osdc, -EIO);
|
|
ceph_mdsc_force_umount(fsc->mdsc);
|
|
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)
|
|
{
|
|
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);
|
|
dev_t dev = s->s_dev;
|
|
|
|
dout("kill_sb %p\n", s);
|
|
|
|
ceph_mdsc_pre_umount(fsc->mdsc);
|
|
flush_fs_workqueues(fsc);
|
|
|
|
generic_shutdown_super(s);
|
|
|
|
fsc->client->extra_mon_dispatch = NULL;
|
|
ceph_fs_debugfs_cleanup(fsc);
|
|
|
|
ceph_fscache_unregister_fs(fsc);
|
|
|
|
destroy_fs_client(fsc);
|
|
free_anon_bdev(dev);
|
|
}
|
|
|
|
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 blacklisted. This also reset
|
|
* all mon/osd connections */
|
|
ceph_reset_client_addr(fsc->client);
|
|
|
|
ceph_osdc_clear_abort_err(&fsc->client->osdc);
|
|
|
|
fsc->blacklisted = 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();
|
|
}
|
|
|
|
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");
|