Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2 | #include <linux/ceph/ceph_debug.h> |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 3 | |
| 4 | #include <linux/backing-dev.h> |
Sage Weil | c309f0a | 2010-06-30 21:34:01 -0700 | [diff] [blame] | 5 | #include <linux/ctype.h> |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 6 | #include <linux/fs.h> |
| 7 | #include <linux/inet.h> |
| 8 | #include <linux/in6.h> |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/mount.h> |
| 11 | #include <linux/parser.h> |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 12 | #include <linux/sched.h> |
| 13 | #include <linux/seq_file.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 14 | #include <linux/slab.h> |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 15 | #include <linux/statfs.h> |
| 16 | #include <linux/string.h> |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 17 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 18 | #include "super.h" |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 19 | #include "mds_client.h" |
| 20 | |
| 21 | #include <linux/ceph/decode.h> |
| 22 | #include <linux/ceph/mon_client.h> |
| 23 | #include <linux/ceph/auth.h> |
| 24 | #include <linux/ceph/debugfs.h> |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 25 | |
| 26 | /* |
| 27 | * Ceph superblock operations |
| 28 | * |
| 29 | * Handle the basics of mounting, unmounting. |
| 30 | */ |
| 31 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 32 | /* |
| 33 | * super ops |
| 34 | */ |
| 35 | static void ceph_put_super(struct super_block *s) |
| 36 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 37 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 38 | |
| 39 | dout("put_super\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 40 | ceph_mdsc_close_sessions(fsc->mdsc); |
Sage Weil | 5dfc589 | 2010-05-04 16:14:46 -0700 | [diff] [blame] | 41 | |
| 42 | /* |
| 43 | * ensure we release the bdi before put_anon_super releases |
| 44 | * the device name. |
| 45 | */ |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 46 | if (s->s_bdi == &fsc->backing_dev_info) { |
| 47 | bdi_unregister(&fsc->backing_dev_info); |
Sage Weil | 5dfc589 | 2010-05-04 16:14:46 -0700 | [diff] [blame] | 48 | s->s_bdi = NULL; |
| 49 | } |
| 50 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 51 | return; |
| 52 | } |
| 53 | |
| 54 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) |
| 55 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 56 | struct ceph_fs_client *fsc = ceph_inode_to_client(dentry->d_inode); |
| 57 | struct ceph_monmap *monmap = fsc->client->monc.monmap; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 58 | struct ceph_statfs st; |
| 59 | u64 fsid; |
| 60 | int err; |
| 61 | |
| 62 | dout("statfs\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 63 | err = ceph_monc_do_statfs(&fsc->client->monc, &st); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 64 | if (err < 0) |
| 65 | return err; |
| 66 | |
| 67 | /* fill in kstatfs */ |
| 68 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ |
| 69 | |
| 70 | /* |
| 71 | * express utilization in terms of large blocks to avoid |
| 72 | * overflow on 32-bit machines. |
| 73 | */ |
| 74 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; |
| 75 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); |
| 76 | buf->f_bfree = (le64_to_cpu(st.kb) - le64_to_cpu(st.kb_used)) >> |
| 77 | (CEPH_BLOCK_SHIFT-10); |
| 78 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
| 79 | |
| 80 | buf->f_files = le64_to_cpu(st.num_objects); |
| 81 | buf->f_ffree = -1; |
Sage Weil | 558d349 | 2010-06-01 12:51:12 -0700 | [diff] [blame] | 82 | buf->f_namelen = NAME_MAX; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 83 | buf->f_frsize = PAGE_CACHE_SIZE; |
| 84 | |
| 85 | /* leave fsid little-endian, regardless of host endianness */ |
| 86 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); |
| 87 | buf->f_fsid.val[0] = fsid & 0xffffffff; |
| 88 | buf->f_fsid.val[1] = fsid >> 32; |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 94 | static int ceph_sync_fs(struct super_block *sb, int wait) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 95 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 96 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 97 | |
| 98 | if (!wait) { |
| 99 | dout("sync_fs (non-blocking)\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 100 | ceph_flush_dirty_caps(fsc->mdsc); |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 101 | dout("sync_fs (non-blocking) done\n"); |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | dout("sync_fs (blocking)\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 106 | ceph_osdc_sync(&fsc->client->osdc); |
| 107 | ceph_mdsc_sync(fsc->mdsc); |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 108 | dout("sync_fs (blocking) done\n"); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 109 | return 0; |
| 110 | } |
| 111 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 112 | /* |
| 113 | * mount options |
| 114 | */ |
| 115 | enum { |
| 116 | Opt_wsize, |
| 117 | Opt_rsize, |
| 118 | Opt_caps_wanted_delay_min, |
| 119 | Opt_caps_wanted_delay_max, |
| 120 | Opt_cap_release_safety, |
| 121 | Opt_readdir_max_entries, |
| 122 | Opt_readdir_max_bytes, |
| 123 | Opt_congestion_kb, |
| 124 | Opt_last_int, |
| 125 | /* int args above */ |
| 126 | Opt_snapdirname, |
| 127 | Opt_last_string, |
| 128 | /* string args above */ |
| 129 | Opt_dirstat, |
| 130 | Opt_nodirstat, |
| 131 | Opt_rbytes, |
| 132 | Opt_norbytes, |
| 133 | Opt_noasyncreaddir, |
| 134 | }; |
| 135 | |
| 136 | static match_table_t fsopt_tokens = { |
| 137 | {Opt_wsize, "wsize=%d"}, |
| 138 | {Opt_rsize, "rsize=%d"}, |
| 139 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
| 140 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, |
| 141 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
| 142 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
| 143 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
| 144 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
| 145 | /* int args above */ |
| 146 | {Opt_snapdirname, "snapdirname=%s"}, |
| 147 | /* string args above */ |
| 148 | {Opt_dirstat, "dirstat"}, |
| 149 | {Opt_nodirstat, "nodirstat"}, |
| 150 | {Opt_rbytes, "rbytes"}, |
| 151 | {Opt_norbytes, "norbytes"}, |
| 152 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
| 153 | {-1, NULL} |
| 154 | }; |
| 155 | |
| 156 | static int parse_fsopt_token(char *c, void *private) |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 157 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 158 | struct ceph_mount_options *fsopt = private; |
| 159 | substring_t argstr[MAX_OPT_ARGS]; |
| 160 | int token, intval, ret; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 161 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 162 | token = match_token((char *)c, fsopt_tokens, argstr); |
| 163 | if (token < 0) |
| 164 | return -EINVAL; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 165 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 166 | if (token < Opt_last_int) { |
| 167 | ret = match_int(&argstr[0], &intval); |
| 168 | if (ret < 0) { |
| 169 | pr_err("bad mount option arg (not int) " |
| 170 | "at '%s'\n", c); |
| 171 | return ret; |
| 172 | } |
| 173 | dout("got int token %d val %d\n", token, intval); |
| 174 | } else if (token > Opt_last_int && token < Opt_last_string) { |
| 175 | dout("got string token %d val %s\n", token, |
| 176 | argstr[0].from); |
| 177 | } else { |
| 178 | dout("got token %d\n", token); |
| 179 | } |
| 180 | |
| 181 | switch (token) { |
| 182 | case Opt_snapdirname: |
| 183 | kfree(fsopt->snapdir_name); |
| 184 | fsopt->snapdir_name = kstrndup(argstr[0].from, |
| 185 | argstr[0].to-argstr[0].from, |
| 186 | GFP_KERNEL); |
| 187 | if (!fsopt->snapdir_name) |
| 188 | return -ENOMEM; |
| 189 | break; |
| 190 | |
| 191 | /* misc */ |
| 192 | case Opt_wsize: |
| 193 | fsopt->wsize = intval; |
| 194 | break; |
| 195 | case Opt_rsize: |
| 196 | fsopt->rsize = intval; |
| 197 | break; |
| 198 | case Opt_caps_wanted_delay_min: |
| 199 | fsopt->caps_wanted_delay_min = intval; |
| 200 | break; |
| 201 | case Opt_caps_wanted_delay_max: |
| 202 | fsopt->caps_wanted_delay_max = intval; |
| 203 | break; |
| 204 | case Opt_readdir_max_entries: |
| 205 | fsopt->max_readdir = intval; |
| 206 | break; |
| 207 | case Opt_readdir_max_bytes: |
| 208 | fsopt->max_readdir_bytes = intval; |
| 209 | break; |
| 210 | case Opt_congestion_kb: |
| 211 | fsopt->congestion_kb = intval; |
| 212 | break; |
| 213 | case Opt_dirstat: |
| 214 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; |
| 215 | break; |
| 216 | case Opt_nodirstat: |
| 217 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; |
| 218 | break; |
| 219 | case Opt_rbytes: |
| 220 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; |
| 221 | break; |
| 222 | case Opt_norbytes: |
| 223 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; |
| 224 | break; |
| 225 | case Opt_noasyncreaddir: |
| 226 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; |
| 227 | break; |
| 228 | default: |
| 229 | BUG_ON(token); |
| 230 | } |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | static void destroy_mount_options(struct ceph_mount_options *args) |
| 235 | { |
| 236 | dout("destroy_mount_options %p\n", args); |
| 237 | kfree(args->snapdir_name); |
| 238 | kfree(args); |
| 239 | } |
| 240 | |
| 241 | static int strcmp_null(const char *s1, const char *s2) |
| 242 | { |
| 243 | if (!s1 && !s2) |
| 244 | return 0; |
| 245 | if (s1 && !s2) |
| 246 | return -1; |
| 247 | if (!s1 && s2) |
| 248 | return 1; |
| 249 | return strcmp(s1, s2); |
| 250 | } |
| 251 | |
| 252 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
| 253 | struct ceph_options *new_opt, |
| 254 | struct ceph_fs_client *fsc) |
| 255 | { |
| 256 | struct ceph_mount_options *fsopt1 = new_fsopt; |
| 257 | struct ceph_mount_options *fsopt2 = fsc->mount_options; |
| 258 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); |
| 259 | int ret; |
| 260 | |
| 261 | ret = memcmp(fsopt1, fsopt2, ofs); |
| 262 | if (ret) |
| 263 | return ret; |
| 264 | |
| 265 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); |
| 266 | if (ret) |
| 267 | return ret; |
| 268 | |
| 269 | return ceph_compare_options(new_opt, fsc->client); |
| 270 | } |
| 271 | |
| 272 | static int parse_mount_options(struct ceph_mount_options **pfsopt, |
| 273 | struct ceph_options **popt, |
| 274 | int flags, char *options, |
| 275 | const char *dev_name, |
| 276 | const char **path) |
| 277 | { |
| 278 | struct ceph_mount_options *fsopt; |
| 279 | const char *dev_name_end; |
| 280 | int err = -ENOMEM; |
| 281 | |
| 282 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); |
| 283 | if (!fsopt) |
| 284 | return -ENOMEM; |
| 285 | |
| 286 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); |
| 287 | |
| 288 | fsopt->sb_flags = flags; |
| 289 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; |
| 290 | |
| 291 | fsopt->rsize = CEPH_MOUNT_RSIZE_DEFAULT; |
| 292 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); |
| 293 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
| 294 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; |
| 295 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; |
| 296 | fsopt->congestion_kb = default_congestion_kb(); |
| 297 | |
| 298 | /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */ |
| 299 | err = -EINVAL; |
| 300 | if (!dev_name) |
| 301 | goto out; |
| 302 | *path = strstr(dev_name, ":/"); |
| 303 | if (*path == NULL) { |
| 304 | pr_err("device name is missing path (no :/ in %s)\n", |
| 305 | dev_name); |
| 306 | goto out; |
| 307 | } |
| 308 | dev_name_end = *path; |
| 309 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
| 310 | |
| 311 | /* path on server */ |
| 312 | *path += 2; |
| 313 | dout("server path '%s'\n", *path); |
| 314 | |
| 315 | err = ceph_parse_options(popt, options, dev_name, dev_name_end, |
| 316 | parse_fsopt_token, (void *)fsopt); |
| 317 | if (err) |
| 318 | goto out; |
| 319 | |
| 320 | /* success */ |
| 321 | *pfsopt = fsopt; |
| 322 | return 0; |
| 323 | |
| 324 | out: |
| 325 | destroy_mount_options(fsopt); |
| 326 | return err; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 327 | } |
| 328 | |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 329 | /** |
| 330 | * ceph_show_options - Show mount options in /proc/mounts |
| 331 | * @m: seq_file to write to |
| 332 | * @mnt: mount descriptor |
| 333 | */ |
| 334 | static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt) |
| 335 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 336 | struct ceph_fs_client *fsc = ceph_sb_to_client(mnt->mnt_sb); |
| 337 | struct ceph_mount_options *fsopt = fsc->mount_options; |
| 338 | struct ceph_options *opt = fsc->client->options; |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 339 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 340 | if (opt->flags & CEPH_OPT_FSID) |
| 341 | seq_printf(m, ",fsid=%pU", &opt->fsid); |
| 342 | if (opt->flags & CEPH_OPT_NOSHARE) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 343 | seq_puts(m, ",noshare"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 344 | if (opt->flags & CEPH_OPT_NOCRC) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 345 | seq_puts(m, ",nocrc"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 346 | |
| 347 | if (opt->name) |
| 348 | seq_printf(m, ",name=%s", opt->name); |
| 349 | if (opt->secret) |
| 350 | seq_puts(m, ",secret=<hidden>"); |
| 351 | |
| 352 | if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) |
| 353 | seq_printf(m, ",mount_timeout=%d", opt->mount_timeout); |
| 354 | if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) |
| 355 | seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl); |
| 356 | if (opt->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT) |
| 357 | seq_printf(m, ",osdtimeout=%d", opt->osd_timeout); |
| 358 | if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) |
| 359 | seq_printf(m, ",osdkeepalivetimeout=%d", |
| 360 | opt->osd_keepalive_timeout); |
| 361 | |
| 362 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) |
| 363 | seq_puts(m, ",dirstat"); |
| 364 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0) |
| 365 | seq_puts(m, ",norbytes"); |
| 366 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 367 | seq_puts(m, ",noasyncreaddir"); |
| 368 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 369 | if (fsopt->wsize) |
| 370 | seq_printf(m, ",wsize=%d", fsopt->wsize); |
| 371 | if (fsopt->rsize != CEPH_MOUNT_RSIZE_DEFAULT) |
| 372 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
| 373 | if (fsopt->congestion_kb != default_congestion_kb()) |
| 374 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); |
| 375 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 376 | seq_printf(m, ",caps_wanted_delay_min=%d", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 377 | fsopt->caps_wanted_delay_min); |
| 378 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 379 | seq_printf(m, ",caps_wanted_delay_max=%d", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 380 | fsopt->caps_wanted_delay_max); |
| 381 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 382 | seq_printf(m, ",cap_release_safety=%d", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 383 | fsopt->cap_release_safety); |
| 384 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) |
| 385 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); |
| 386 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) |
| 387 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); |
| 388 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) |
| 389 | seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name); |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | /* |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 394 | * handle any mon messages the standard library doesn't understand. |
| 395 | * return error if we don't either. |
| 396 | */ |
| 397 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
| 398 | { |
| 399 | struct ceph_fs_client *fsc = client->private; |
| 400 | int type = le16_to_cpu(msg->hdr.type); |
| 401 | |
| 402 | switch (type) { |
| 403 | case CEPH_MSG_MDS_MAP: |
| 404 | ceph_mdsc_handle_map(fsc->mdsc, msg); |
| 405 | return 0; |
| 406 | |
| 407 | default: |
| 408 | return -1; |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | /* |
| 413 | * create a new fs client |
| 414 | */ |
| 415 | struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
| 416 | struct ceph_options *opt) |
| 417 | { |
| 418 | struct ceph_fs_client *fsc; |
| 419 | int err = -ENOMEM; |
| 420 | |
| 421 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
| 422 | if (!fsc) |
| 423 | return ERR_PTR(-ENOMEM); |
| 424 | |
| 425 | fsc->client = ceph_create_client(opt, fsc); |
| 426 | if (IS_ERR(fsc->client)) { |
| 427 | err = PTR_ERR(fsc->client); |
| 428 | goto fail; |
| 429 | } |
| 430 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; |
| 431 | fsc->client->supported_features |= CEPH_FEATURE_FLOCK; |
| 432 | fsc->client->monc.want_mdsmap = 1; |
| 433 | |
| 434 | fsc->mount_options = fsopt; |
| 435 | |
| 436 | fsc->sb = NULL; |
| 437 | fsc->mount_state = CEPH_MOUNT_MOUNTING; |
| 438 | |
| 439 | atomic_long_set(&fsc->writeback_count, 0); |
| 440 | |
| 441 | err = bdi_init(&fsc->backing_dev_info); |
| 442 | if (err < 0) |
| 443 | goto fail_client; |
| 444 | |
| 445 | err = -ENOMEM; |
| 446 | fsc->wb_wq = create_workqueue("ceph-writeback"); |
| 447 | if (fsc->wb_wq == NULL) |
| 448 | goto fail_bdi; |
| 449 | fsc->pg_inv_wq = create_singlethread_workqueue("ceph-pg-invalid"); |
| 450 | if (fsc->pg_inv_wq == NULL) |
| 451 | goto fail_wb_wq; |
| 452 | fsc->trunc_wq = create_singlethread_workqueue("ceph-trunc"); |
| 453 | if (fsc->trunc_wq == NULL) |
| 454 | goto fail_pg_inv_wq; |
| 455 | |
| 456 | /* set up mempools */ |
| 457 | err = -ENOMEM; |
| 458 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, |
| 459 | fsc->mount_options->wsize >> PAGE_CACHE_SHIFT); |
| 460 | if (!fsc->wb_pagevec_pool) |
| 461 | goto fail_trunc_wq; |
| 462 | |
| 463 | /* caps */ |
| 464 | fsc->min_caps = fsopt->max_readdir; |
| 465 | |
| 466 | return fsc; |
| 467 | |
| 468 | fail_trunc_wq: |
| 469 | destroy_workqueue(fsc->trunc_wq); |
| 470 | fail_pg_inv_wq: |
| 471 | destroy_workqueue(fsc->pg_inv_wq); |
| 472 | fail_wb_wq: |
| 473 | destroy_workqueue(fsc->wb_wq); |
| 474 | fail_bdi: |
| 475 | bdi_destroy(&fsc->backing_dev_info); |
| 476 | fail_client: |
| 477 | ceph_destroy_client(fsc->client); |
| 478 | fail: |
| 479 | kfree(fsc); |
| 480 | return ERR_PTR(err); |
| 481 | } |
| 482 | |
| 483 | void destroy_fs_client(struct ceph_fs_client *fsc) |
| 484 | { |
| 485 | dout("destroy_fs_client %p\n", fsc); |
| 486 | |
| 487 | destroy_workqueue(fsc->wb_wq); |
| 488 | destroy_workqueue(fsc->pg_inv_wq); |
| 489 | destroy_workqueue(fsc->trunc_wq); |
| 490 | |
| 491 | bdi_destroy(&fsc->backing_dev_info); |
| 492 | |
| 493 | mempool_destroy(fsc->wb_pagevec_pool); |
| 494 | |
| 495 | destroy_mount_options(fsc->mount_options); |
| 496 | |
| 497 | ceph_fs_debugfs_cleanup(fsc); |
| 498 | |
| 499 | ceph_destroy_client(fsc->client); |
| 500 | |
| 501 | kfree(fsc); |
| 502 | dout("destroy_fs_client %p done\n", fsc); |
| 503 | } |
| 504 | |
| 505 | /* |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 506 | * caches |
| 507 | */ |
| 508 | struct kmem_cache *ceph_inode_cachep; |
| 509 | struct kmem_cache *ceph_cap_cachep; |
| 510 | struct kmem_cache *ceph_dentry_cachep; |
| 511 | struct kmem_cache *ceph_file_cachep; |
| 512 | |
| 513 | static void ceph_inode_init_once(void *foo) |
| 514 | { |
| 515 | struct ceph_inode_info *ci = foo; |
| 516 | inode_init_once(&ci->vfs_inode); |
| 517 | } |
| 518 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 519 | static int __init init_caches(void) |
| 520 | { |
| 521 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", |
| 522 | sizeof(struct ceph_inode_info), |
| 523 | __alignof__(struct ceph_inode_info), |
| 524 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), |
| 525 | ceph_inode_init_once); |
| 526 | if (ceph_inode_cachep == NULL) |
| 527 | return -ENOMEM; |
| 528 | |
| 529 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, |
| 530 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); |
| 531 | if (ceph_cap_cachep == NULL) |
| 532 | goto bad_cap; |
| 533 | |
| 534 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, |
| 535 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); |
| 536 | if (ceph_dentry_cachep == NULL) |
| 537 | goto bad_dentry; |
| 538 | |
| 539 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, |
| 540 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); |
| 541 | if (ceph_file_cachep == NULL) |
| 542 | goto bad_file; |
| 543 | |
| 544 | return 0; |
| 545 | |
| 546 | bad_file: |
| 547 | kmem_cache_destroy(ceph_dentry_cachep); |
| 548 | bad_dentry: |
| 549 | kmem_cache_destroy(ceph_cap_cachep); |
| 550 | bad_cap: |
| 551 | kmem_cache_destroy(ceph_inode_cachep); |
| 552 | return -ENOMEM; |
| 553 | } |
| 554 | |
| 555 | static void destroy_caches(void) |
| 556 | { |
| 557 | kmem_cache_destroy(ceph_inode_cachep); |
| 558 | kmem_cache_destroy(ceph_cap_cachep); |
| 559 | kmem_cache_destroy(ceph_dentry_cachep); |
| 560 | kmem_cache_destroy(ceph_file_cachep); |
| 561 | } |
| 562 | |
| 563 | |
| 564 | /* |
| 565 | * ceph_umount_begin - initiate forced umount. Tear down down the |
| 566 | * mount, skipping steps that may hang while waiting for server(s). |
| 567 | */ |
| 568 | static void ceph_umount_begin(struct super_block *sb) |
| 569 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 570 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 571 | |
| 572 | dout("ceph_umount_begin - starting forced umount\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 573 | if (!fsc) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 574 | return; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 575 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 576 | return; |
| 577 | } |
| 578 | |
| 579 | static const struct super_operations ceph_super_ops = { |
| 580 | .alloc_inode = ceph_alloc_inode, |
| 581 | .destroy_inode = ceph_destroy_inode, |
| 582 | .write_inode = ceph_write_inode, |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 583 | .sync_fs = ceph_sync_fs, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 584 | .put_super = ceph_put_super, |
| 585 | .show_options = ceph_show_options, |
| 586 | .statfs = ceph_statfs, |
| 587 | .umount_begin = ceph_umount_begin, |
| 588 | }; |
| 589 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 590 | /* |
| 591 | * Bootstrap mount by opening the root directory. Note the mount |
| 592 | * @started time from caller, and time out if this takes too long. |
| 593 | */ |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 594 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 595 | const char *path, |
| 596 | unsigned long started) |
| 597 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 598 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 599 | struct ceph_mds_request *req = NULL; |
| 600 | int err; |
| 601 | struct dentry *root; |
| 602 | |
| 603 | /* open dir */ |
| 604 | dout("open_root_inode opening '%s'\n", path); |
| 605 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); |
| 606 | if (IS_ERR(req)) |
Julia Lawall | 7e34bc5 | 2010-05-22 12:01:14 +0200 | [diff] [blame] | 607 | return ERR_CAST(req); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 608 | req->r_path1 = kstrdup(path, GFP_NOFS); |
| 609 | req->r_ino1.ino = CEPH_INO_ROOT; |
| 610 | req->r_ino1.snap = CEPH_NOSNAP; |
| 611 | req->r_started = started; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 612 | req->r_timeout = fsc->client->options->mount_timeout * HZ; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 613 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
| 614 | req->r_num_caps = 2; |
| 615 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
| 616 | if (err == 0) { |
| 617 | dout("open_root_inode success\n"); |
| 618 | if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT && |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 619 | fsc->sb->s_root == NULL) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 620 | root = d_alloc_root(req->r_target_inode); |
| 621 | else |
| 622 | root = d_obtain_alias(req->r_target_inode); |
| 623 | req->r_target_inode = NULL; |
| 624 | dout("open_root_inode success, root dentry is %p\n", root); |
| 625 | } else { |
| 626 | root = ERR_PTR(err); |
| 627 | } |
| 628 | ceph_mdsc_put_request(req); |
| 629 | return root; |
| 630 | } |
| 631 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 632 | |
| 633 | |
| 634 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 635 | /* |
| 636 | * mount: join the ceph cluster, and open root directory. |
| 637 | */ |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 638 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 639 | const char *path) |
| 640 | { |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 641 | int err; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 642 | unsigned long started = jiffies; /* note the start time */ |
| 643 | struct dentry *root; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 644 | int first = 0; /* first vfsmount for this super_block */ |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 645 | |
| 646 | dout("mount start\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 647 | mutex_lock(&fsc->client->mount_mutex); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 648 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 649 | err = __ceph_open_session(fsc->client, started); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 650 | if (err < 0) |
| 651 | goto out; |
| 652 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 653 | dout("mount opening root\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 654 | root = open_root_dentry(fsc, "", started); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 655 | if (IS_ERR(root)) { |
| 656 | err = PTR_ERR(root); |
| 657 | goto out; |
| 658 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 659 | if (fsc->sb->s_root) { |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 660 | dput(root); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 661 | } else { |
| 662 | fsc->sb->s_root = root; |
| 663 | first = 1; |
| 664 | |
| 665 | err = ceph_fs_debugfs_init(fsc); |
| 666 | if (err < 0) |
| 667 | goto fail; |
| 668 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 669 | |
| 670 | if (path[0] == 0) { |
| 671 | dget(root); |
| 672 | } else { |
| 673 | dout("mount opening base mountpoint\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 674 | root = open_root_dentry(fsc, path, started); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 675 | if (IS_ERR(root)) { |
| 676 | err = PTR_ERR(root); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 677 | goto fail; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 678 | } |
| 679 | } |
| 680 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 681 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 682 | dout("mount success\n"); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 683 | mutex_unlock(&fsc->client->mount_mutex); |
| 684 | return root; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 685 | |
| 686 | out: |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 687 | mutex_unlock(&fsc->client->mount_mutex); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 688 | return ERR_PTR(err); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 689 | |
| 690 | fail: |
| 691 | if (first) { |
| 692 | dput(fsc->sb->s_root); |
| 693 | fsc->sb->s_root = NULL; |
| 694 | } |
| 695 | goto out; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 696 | } |
| 697 | |
| 698 | static int ceph_set_super(struct super_block *s, void *data) |
| 699 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 700 | struct ceph_fs_client *fsc = data; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 701 | int ret; |
| 702 | |
| 703 | dout("set_super %p data %p\n", s, data); |
| 704 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 705 | s->s_flags = fsc->mount_options->sb_flags; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 706 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
| 707 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 708 | s->s_fs_info = fsc; |
| 709 | fsc->sb = s; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 710 | |
| 711 | s->s_op = &ceph_super_ops; |
| 712 | s->s_export_op = &ceph_export_ops; |
| 713 | |
| 714 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ |
| 715 | |
| 716 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ |
| 717 | if (ret != 0) |
| 718 | goto fail; |
| 719 | |
| 720 | return ret; |
| 721 | |
| 722 | fail: |
| 723 | s->s_fs_info = NULL; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 724 | fsc->sb = NULL; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 725 | return ret; |
| 726 | } |
| 727 | |
| 728 | /* |
| 729 | * share superblock if same fs AND options |
| 730 | */ |
| 731 | static int ceph_compare_super(struct super_block *sb, void *data) |
| 732 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 733 | struct ceph_fs_client *new = data; |
| 734 | struct ceph_mount_options *fsopt = new->mount_options; |
| 735 | struct ceph_options *opt = new->client->options; |
| 736 | struct ceph_fs_client *other = ceph_sb_to_client(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 737 | |
| 738 | dout("ceph_compare_super %p\n", sb); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 739 | |
| 740 | if (compare_mount_options(fsopt, opt, other)) { |
| 741 | dout("monitor(s)/mount options don't match\n"); |
| 742 | return 0; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 743 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 744 | if ((opt->flags & CEPH_OPT_FSID) && |
| 745 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { |
| 746 | dout("fsid doesn't match\n"); |
| 747 | return 0; |
| 748 | } |
| 749 | if (fsopt->sb_flags != other->mount_options->sb_flags) { |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 750 | dout("flags differ\n"); |
| 751 | return 0; |
| 752 | } |
| 753 | return 1; |
| 754 | } |
| 755 | |
| 756 | /* |
| 757 | * construct our own bdi so we can control readahead, etc. |
| 758 | */ |
Jeff Mahoney | 00d5643 | 2010-06-10 11:13:58 -0400 | [diff] [blame] | 759 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
Sage Weil | 31e0cf8 | 2010-05-04 16:39:35 -0700 | [diff] [blame] | 760 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 761 | static int ceph_register_bdi(struct super_block *sb, |
| 762 | struct ceph_fs_client *fsc) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 763 | { |
| 764 | int err; |
| 765 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 766 | /* set ra_pages based on rsize mount option? */ |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 767 | if (fsc->mount_options->rsize >= PAGE_CACHE_SIZE) |
| 768 | fsc->backing_dev_info.ra_pages = |
| 769 | (fsc->mount_options->rsize + PAGE_CACHE_SIZE - 1) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 770 | >> PAGE_SHIFT; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 771 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d", |
Sage Weil | 31e0cf8 | 2010-05-04 16:39:35 -0700 | [diff] [blame] | 772 | atomic_long_inc_return(&bdi_seq)); |
Sage Weil | 5dfc589 | 2010-05-04 16:14:46 -0700 | [diff] [blame] | 773 | if (!err) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 774 | sb->s_bdi = &fsc->backing_dev_info; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 775 | return err; |
| 776 | } |
| 777 | |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 778 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
| 779 | int flags, const char *dev_name, void *data) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 780 | { |
| 781 | struct super_block *sb; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 782 | struct ceph_fs_client *fsc; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 783 | struct dentry *res; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 784 | int err; |
| 785 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; |
Sage Weil | 6a18be1 | 2009-11-04 11:40:05 -0800 | [diff] [blame] | 786 | const char *path = NULL; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 787 | struct ceph_mount_options *fsopt = NULL; |
| 788 | struct ceph_options *opt = NULL; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 789 | |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 790 | dout("ceph_mount\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 791 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 792 | if (err < 0) { |
| 793 | res = ERR_PTR(err); |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 794 | goto out_final; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 795 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 796 | |
| 797 | /* create client (which we may/may not use) */ |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 798 | fsc = create_fs_client(fsopt, opt); |
| 799 | if (IS_ERR(fsc)) { |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 800 | res = ERR_CAST(fsc); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 801 | kfree(fsopt); |
| 802 | kfree(opt); |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 803 | goto out_final; |
| 804 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 805 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 806 | err = ceph_mdsc_init(fsc); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 807 | if (err < 0) { |
| 808 | res = ERR_PTR(err); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 809 | goto out; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 810 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 811 | |
| 812 | if (ceph_test_opt(fsc->client, NOSHARE)) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 813 | compare_super = NULL; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 814 | sb = sget(fs_type, compare_super, ceph_set_super, fsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 815 | if (IS_ERR(sb)) { |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 816 | res = ERR_CAST(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 817 | goto out; |
| 818 | } |
| 819 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 820 | if (ceph_sb_to_client(sb) != fsc) { |
| 821 | ceph_mdsc_destroy(fsc); |
| 822 | destroy_fs_client(fsc); |
| 823 | fsc = ceph_sb_to_client(sb); |
| 824 | dout("get_sb got existing client %p\n", fsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 825 | } else { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 826 | dout("get_sb using new client %p\n", fsc); |
| 827 | err = ceph_register_bdi(sb, fsc); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 828 | if (err < 0) { |
| 829 | res = ERR_PTR(err); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 830 | goto out_splat; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 831 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 832 | } |
| 833 | |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 834 | res = ceph_real_mount(fsc, path); |
| 835 | if (IS_ERR(res)) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 836 | goto out_splat; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 837 | dout("root %p inode %p ino %llx.%llx\n", res, |
| 838 | res->d_inode, ceph_vinop(res->d_inode)); |
| 839 | return res; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 840 | |
| 841 | out_splat: |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 842 | ceph_mdsc_close_sessions(fsc->mdsc); |
Al Viro | 3981f2e | 2010-03-21 19:22:29 -0400 | [diff] [blame] | 843 | deactivate_locked_super(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 844 | goto out_final; |
| 845 | |
| 846 | out: |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 847 | ceph_mdsc_destroy(fsc); |
| 848 | destroy_fs_client(fsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 849 | out_final: |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 850 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
| 851 | return res; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 852 | } |
| 853 | |
| 854 | static void ceph_kill_sb(struct super_block *s) |
| 855 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 856 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 857 | dout("kill_sb %p\n", s); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 858 | ceph_mdsc_pre_umount(fsc->mdsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 859 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 860 | ceph_mdsc_destroy(fsc); |
| 861 | destroy_fs_client(fsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 862 | } |
| 863 | |
| 864 | static struct file_system_type ceph_fs_type = { |
| 865 | .owner = THIS_MODULE, |
| 866 | .name = "ceph", |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 867 | .mount = ceph_mount, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 868 | .kill_sb = ceph_kill_sb, |
| 869 | .fs_flags = FS_RENAME_DOES_D_MOVE, |
| 870 | }; |
| 871 | |
| 872 | #define _STRINGIFY(x) #x |
| 873 | #define STRINGIFY(x) _STRINGIFY(x) |
| 874 | |
| 875 | static int __init init_ceph(void) |
| 876 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 877 | int ret = init_caches(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 878 | if (ret) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 879 | goto out; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 880 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 881 | ret = register_filesystem(&ceph_fs_type); |
| 882 | if (ret) |
| 883 | goto out_icache; |
| 884 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 885 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
| 886 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 887 | return 0; |
| 888 | |
| 889 | out_icache: |
| 890 | destroy_caches(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 891 | out: |
| 892 | return ret; |
| 893 | } |
| 894 | |
| 895 | static void __exit exit_ceph(void) |
| 896 | { |
| 897 | dout("exit_ceph\n"); |
| 898 | unregister_filesystem(&ceph_fs_type); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 899 | destroy_caches(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 900 | } |
| 901 | |
| 902 | module_init(init_ceph); |
| 903 | module_exit(exit_ceph); |
| 904 | |
| 905 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); |
| 906 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); |
| 907 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); |
| 908 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); |
| 909 | MODULE_LICENSE("GPL"); |