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" |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 20 | #include "cache.h" |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 21 | |
Sage Weil | 1fe60e5 | 2012-07-30 16:23:22 -0700 | [diff] [blame] | 22 | #include <linux/ceph/ceph_features.h> |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 23 | #include <linux/ceph/decode.h> |
| 24 | #include <linux/ceph/mon_client.h> |
| 25 | #include <linux/ceph/auth.h> |
| 26 | #include <linux/ceph/debugfs.h> |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 27 | |
| 28 | /* |
| 29 | * Ceph superblock operations |
| 30 | * |
| 31 | * Handle the basics of mounting, unmounting. |
| 32 | */ |
| 33 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 34 | /* |
| 35 | * super ops |
| 36 | */ |
| 37 | static void ceph_put_super(struct super_block *s) |
| 38 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 39 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 40 | |
| 41 | dout("put_super\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 42 | ceph_mdsc_close_sessions(fsc->mdsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) |
| 46 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 47 | struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry)); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 48 | struct ceph_monmap *monmap = fsc->client->monc.monmap; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 49 | struct ceph_statfs st; |
| 50 | u64 fsid; |
| 51 | int err; |
| 52 | |
| 53 | dout("statfs\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 54 | err = ceph_monc_do_statfs(&fsc->client->monc, &st); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 55 | if (err < 0) |
| 56 | return err; |
| 57 | |
| 58 | /* fill in kstatfs */ |
| 59 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ |
| 60 | |
| 61 | /* |
| 62 | * express utilization in terms of large blocks to avoid |
| 63 | * overflow on 32-bit machines. |
Sage Weil | 92a49fb | 2013-02-22 15:31:00 -0800 | [diff] [blame] | 64 | * |
| 65 | * NOTE: for the time being, we make bsize == frsize to humor |
| 66 | * not-yet-ancient versions of glibc that are broken. |
| 67 | * Someday, we will probably want to report a real block |
| 68 | * size... whatever that may mean for a network file system! |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 69 | */ |
| 70 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; |
Sage Weil | 92a49fb | 2013-02-22 15:31:00 -0800 | [diff] [blame] | 71 | buf->f_frsize = 1 << CEPH_BLOCK_SHIFT; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 72 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); |
Greg Farnum | 8f04d42 | 2011-07-26 11:26:54 -0700 | [diff] [blame] | 73 | buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 74 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
| 75 | |
| 76 | buf->f_files = le64_to_cpu(st.num_objects); |
| 77 | buf->f_ffree = -1; |
Sage Weil | 558d349 | 2010-06-01 12:51:12 -0700 | [diff] [blame] | 78 | buf->f_namelen = NAME_MAX; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 79 | |
| 80 | /* leave fsid little-endian, regardless of host endianness */ |
| 81 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); |
| 82 | buf->f_fsid.val[0] = fsid & 0xffffffff; |
| 83 | buf->f_fsid.val[1] = fsid >> 32; |
| 84 | |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 89 | static int ceph_sync_fs(struct super_block *sb, int wait) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 90 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 91 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 92 | |
| 93 | if (!wait) { |
| 94 | dout("sync_fs (non-blocking)\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 95 | ceph_flush_dirty_caps(fsc->mdsc); |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 96 | dout("sync_fs (non-blocking) done\n"); |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | dout("sync_fs (blocking)\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 101 | ceph_osdc_sync(&fsc->client->osdc); |
| 102 | ceph_mdsc_sync(fsc->mdsc); |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 103 | dout("sync_fs (blocking) done\n"); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 104 | return 0; |
| 105 | } |
| 106 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 107 | /* |
| 108 | * mount options |
| 109 | */ |
| 110 | enum { |
Yan, Zheng | 235a098 | 2016-03-30 17:18:34 +0800 | [diff] [blame^] | 111 | Opt_mds_namespace, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 112 | Opt_wsize, |
| 113 | Opt_rsize, |
Sage Weil | 83817e3 | 2011-08-04 08:03:44 -0700 | [diff] [blame] | 114 | Opt_rasize, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 115 | Opt_caps_wanted_delay_min, |
| 116 | Opt_caps_wanted_delay_max, |
| 117 | Opt_cap_release_safety, |
| 118 | Opt_readdir_max_entries, |
| 119 | Opt_readdir_max_bytes, |
| 120 | Opt_congestion_kb, |
| 121 | Opt_last_int, |
| 122 | /* int args above */ |
| 123 | Opt_snapdirname, |
| 124 | Opt_last_string, |
| 125 | /* string args above */ |
| 126 | Opt_dirstat, |
| 127 | Opt_nodirstat, |
| 128 | Opt_rbytes, |
| 129 | Opt_norbytes, |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 130 | Opt_asyncreaddir, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 131 | Opt_noasyncreaddir, |
Sage Weil | a40dc6c | 2012-01-10 09:12:55 -0800 | [diff] [blame] | 132 | Opt_dcache, |
| 133 | Opt_nodcache, |
Yehuda Sadeh | ad1fee9 | 2011-01-21 16:44:03 -0800 | [diff] [blame] | 134 | Opt_ino32, |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 135 | Opt_noino32, |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 136 | Opt_fscache, |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 137 | Opt_nofscache, |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 138 | Opt_poolperm, |
| 139 | Opt_nopoolperm, |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 140 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
| 141 | Opt_acl, |
| 142 | #endif |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 143 | Opt_noacl, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 144 | }; |
| 145 | |
| 146 | static match_table_t fsopt_tokens = { |
Yan, Zheng | 235a098 | 2016-03-30 17:18:34 +0800 | [diff] [blame^] | 147 | {Opt_mds_namespace, "mds_namespace=%d"}, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 148 | {Opt_wsize, "wsize=%d"}, |
| 149 | {Opt_rsize, "rsize=%d"}, |
Sage Weil | 83817e3 | 2011-08-04 08:03:44 -0700 | [diff] [blame] | 150 | {Opt_rasize, "rasize=%d"}, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 151 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
| 152 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, |
| 153 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
| 154 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
| 155 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
| 156 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
| 157 | /* int args above */ |
| 158 | {Opt_snapdirname, "snapdirname=%s"}, |
| 159 | /* string args above */ |
| 160 | {Opt_dirstat, "dirstat"}, |
| 161 | {Opt_nodirstat, "nodirstat"}, |
| 162 | {Opt_rbytes, "rbytes"}, |
| 163 | {Opt_norbytes, "norbytes"}, |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 164 | {Opt_asyncreaddir, "asyncreaddir"}, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 165 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
Sage Weil | a40dc6c | 2012-01-10 09:12:55 -0800 | [diff] [blame] | 166 | {Opt_dcache, "dcache"}, |
| 167 | {Opt_nodcache, "nodcache"}, |
Yehuda Sadeh | ad1fee9 | 2011-01-21 16:44:03 -0800 | [diff] [blame] | 168 | {Opt_ino32, "ino32"}, |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 169 | {Opt_noino32, "noino32"}, |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 170 | {Opt_fscache, "fsc"}, |
| 171 | {Opt_nofscache, "nofsc"}, |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 172 | {Opt_poolperm, "poolperm"}, |
| 173 | {Opt_nopoolperm, "nopoolperm"}, |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 174 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
| 175 | {Opt_acl, "acl"}, |
| 176 | #endif |
| 177 | {Opt_noacl, "noacl"}, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 178 | {-1, NULL} |
| 179 | }; |
| 180 | |
| 181 | static int parse_fsopt_token(char *c, void *private) |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 182 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 183 | struct ceph_mount_options *fsopt = private; |
| 184 | substring_t argstr[MAX_OPT_ARGS]; |
| 185 | int token, intval, ret; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 186 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 187 | token = match_token((char *)c, fsopt_tokens, argstr); |
| 188 | if (token < 0) |
| 189 | return -EINVAL; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 190 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 191 | if (token < Opt_last_int) { |
| 192 | ret = match_int(&argstr[0], &intval); |
| 193 | if (ret < 0) { |
| 194 | pr_err("bad mount option arg (not int) " |
| 195 | "at '%s'\n", c); |
| 196 | return ret; |
| 197 | } |
| 198 | dout("got int token %d val %d\n", token, intval); |
| 199 | } else if (token > Opt_last_int && token < Opt_last_string) { |
| 200 | dout("got string token %d val %s\n", token, |
| 201 | argstr[0].from); |
| 202 | } else { |
| 203 | dout("got token %d\n", token); |
| 204 | } |
| 205 | |
| 206 | switch (token) { |
| 207 | case Opt_snapdirname: |
| 208 | kfree(fsopt->snapdir_name); |
| 209 | fsopt->snapdir_name = kstrndup(argstr[0].from, |
| 210 | argstr[0].to-argstr[0].from, |
| 211 | GFP_KERNEL); |
| 212 | if (!fsopt->snapdir_name) |
| 213 | return -ENOMEM; |
| 214 | break; |
| 215 | |
| 216 | /* misc */ |
Yan, Zheng | 235a098 | 2016-03-30 17:18:34 +0800 | [diff] [blame^] | 217 | case Opt_mds_namespace: |
| 218 | fsopt->mds_namespace = intval; |
| 219 | break; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 220 | case Opt_wsize: |
| 221 | fsopt->wsize = intval; |
| 222 | break; |
| 223 | case Opt_rsize: |
| 224 | fsopt->rsize = intval; |
| 225 | break; |
Sage Weil | 83817e3 | 2011-08-04 08:03:44 -0700 | [diff] [blame] | 226 | case Opt_rasize: |
| 227 | fsopt->rasize = intval; |
| 228 | break; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 229 | case Opt_caps_wanted_delay_min: |
| 230 | fsopt->caps_wanted_delay_min = intval; |
| 231 | break; |
| 232 | case Opt_caps_wanted_delay_max: |
| 233 | fsopt->caps_wanted_delay_max = intval; |
| 234 | break; |
| 235 | case Opt_readdir_max_entries: |
| 236 | fsopt->max_readdir = intval; |
| 237 | break; |
| 238 | case Opt_readdir_max_bytes: |
| 239 | fsopt->max_readdir_bytes = intval; |
| 240 | break; |
| 241 | case Opt_congestion_kb: |
| 242 | fsopt->congestion_kb = intval; |
| 243 | break; |
| 244 | case Opt_dirstat: |
| 245 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; |
| 246 | break; |
| 247 | case Opt_nodirstat: |
| 248 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; |
| 249 | break; |
| 250 | case Opt_rbytes: |
| 251 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; |
| 252 | break; |
| 253 | case Opt_norbytes: |
| 254 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; |
| 255 | break; |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 256 | case Opt_asyncreaddir: |
| 257 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; |
| 258 | break; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 259 | case Opt_noasyncreaddir: |
| 260 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; |
| 261 | break; |
Sage Weil | a40dc6c | 2012-01-10 09:12:55 -0800 | [diff] [blame] | 262 | case Opt_dcache: |
| 263 | fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; |
| 264 | break; |
| 265 | case Opt_nodcache: |
| 266 | fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; |
| 267 | break; |
Yehuda Sadeh | ad1fee9 | 2011-01-21 16:44:03 -0800 | [diff] [blame] | 268 | case Opt_ino32: |
| 269 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; |
| 270 | break; |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 271 | case Opt_noino32: |
| 272 | fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; |
| 273 | break; |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 274 | case Opt_fscache: |
| 275 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; |
| 276 | break; |
| 277 | case Opt_nofscache: |
| 278 | fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; |
| 279 | break; |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 280 | case Opt_poolperm: |
| 281 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; |
| 282 | printk ("pool perm"); |
| 283 | break; |
| 284 | case Opt_nopoolperm: |
| 285 | fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM; |
| 286 | break; |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 287 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
| 288 | case Opt_acl: |
| 289 | fsopt->sb_flags |= MS_POSIXACL; |
| 290 | break; |
| 291 | #endif |
| 292 | case Opt_noacl: |
| 293 | fsopt->sb_flags &= ~MS_POSIXACL; |
| 294 | break; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 295 | default: |
| 296 | BUG_ON(token); |
| 297 | } |
| 298 | return 0; |
| 299 | } |
| 300 | |
| 301 | static void destroy_mount_options(struct ceph_mount_options *args) |
| 302 | { |
| 303 | dout("destroy_mount_options %p\n", args); |
| 304 | kfree(args->snapdir_name); |
| 305 | kfree(args); |
| 306 | } |
| 307 | |
| 308 | static int strcmp_null(const char *s1, const char *s2) |
| 309 | { |
| 310 | if (!s1 && !s2) |
| 311 | return 0; |
| 312 | if (s1 && !s2) |
| 313 | return -1; |
| 314 | if (!s1 && s2) |
| 315 | return 1; |
| 316 | return strcmp(s1, s2); |
| 317 | } |
| 318 | |
| 319 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
| 320 | struct ceph_options *new_opt, |
| 321 | struct ceph_fs_client *fsc) |
| 322 | { |
| 323 | struct ceph_mount_options *fsopt1 = new_fsopt; |
| 324 | struct ceph_mount_options *fsopt2 = fsc->mount_options; |
| 325 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); |
| 326 | int ret; |
| 327 | |
| 328 | ret = memcmp(fsopt1, fsopt2, ofs); |
| 329 | if (ret) |
| 330 | return ret; |
| 331 | |
| 332 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); |
| 333 | if (ret) |
| 334 | return ret; |
| 335 | |
| 336 | return ceph_compare_options(new_opt, fsc->client); |
| 337 | } |
| 338 | |
| 339 | static int parse_mount_options(struct ceph_mount_options **pfsopt, |
| 340 | struct ceph_options **popt, |
| 341 | int flags, char *options, |
| 342 | const char *dev_name, |
| 343 | const char **path) |
| 344 | { |
| 345 | struct ceph_mount_options *fsopt; |
| 346 | const char *dev_name_end; |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 347 | int err; |
| 348 | |
| 349 | if (!dev_name || !*dev_name) |
| 350 | return -EINVAL; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 351 | |
| 352 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); |
| 353 | if (!fsopt) |
| 354 | return -ENOMEM; |
| 355 | |
| 356 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); |
| 357 | |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 358 | fsopt->sb_flags = flags; |
| 359 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 360 | |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 361 | fsopt->rsize = CEPH_RSIZE_DEFAULT; |
| 362 | fsopt->rasize = CEPH_RASIZE_DEFAULT; |
| 363 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); |
Sanidhya Kashyap | a149bb9 | 2015-03-21 12:54:58 -0400 | [diff] [blame] | 364 | if (!fsopt->snapdir_name) { |
| 365 | err = -ENOMEM; |
| 366 | goto out; |
| 367 | } |
| 368 | |
Sage Weil | 50aac4f | 2011-01-18 07:59:40 -0800 | [diff] [blame] | 369 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
| 370 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 371 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
| 372 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; |
| 373 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; |
| 374 | fsopt->congestion_kb = default_congestion_kb(); |
Yan, Zheng | 235a098 | 2016-03-30 17:18:34 +0800 | [diff] [blame^] | 375 | fsopt->mds_namespace = CEPH_FS_CLUSTER_ID_NONE; |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 376 | |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 377 | /* |
| 378 | * Distinguish the server list from the path in "dev_name". |
| 379 | * Internally we do not include the leading '/' in the path. |
| 380 | * |
| 381 | * "dev_name" will look like: |
| 382 | * <server_spec>[,<server_spec>...]:[<path>] |
| 383 | * where |
| 384 | * <server_spec> is <ip>[:<port>] |
| 385 | * <path> is optional, but if present must begin with '/' |
| 386 | */ |
| 387 | dev_name_end = strchr(dev_name, '/'); |
| 388 | if (dev_name_end) { |
| 389 | /* skip over leading '/' for path */ |
| 390 | *path = dev_name_end + 1; |
| 391 | } else { |
| 392 | /* path is empty */ |
| 393 | dev_name_end = dev_name + strlen(dev_name); |
| 394 | *path = dev_name_end; |
| 395 | } |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 396 | err = -EINVAL; |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 397 | dev_name_end--; /* back up to ':' separator */ |
Sasha Levin | 5446429 | 2013-07-01 18:33:39 -0400 | [diff] [blame] | 398 | if (dev_name_end < dev_name || *dev_name_end != ':') { |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 399 | pr_err("device name is missing path (no : separator in %s)\n", |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 400 | dev_name); |
| 401 | goto out; |
| 402 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 403 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 404 | dout("server path '%s'\n", *path); |
| 405 | |
Alex Elder | ee57741 | 2012-01-24 10:08:36 -0600 | [diff] [blame] | 406 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 407 | parse_fsopt_token, (void *)fsopt); |
Alex Elder | ee57741 | 2012-01-24 10:08:36 -0600 | [diff] [blame] | 408 | if (IS_ERR(*popt)) { |
| 409 | err = PTR_ERR(*popt); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 410 | goto out; |
Alex Elder | ee57741 | 2012-01-24 10:08:36 -0600 | [diff] [blame] | 411 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 412 | |
| 413 | /* success */ |
| 414 | *pfsopt = fsopt; |
| 415 | return 0; |
| 416 | |
| 417 | out: |
| 418 | destroy_mount_options(fsopt); |
| 419 | return err; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 420 | } |
| 421 | |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 422 | /** |
| 423 | * ceph_show_options - Show mount options in /proc/mounts |
| 424 | * @m: seq_file to write to |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 425 | * @root: root of that (sub)tree |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 426 | */ |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 427 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 428 | { |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 429 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 430 | struct ceph_mount_options *fsopt = fsc->mount_options; |
Ilya Dryomov | ff40f9a | 2015-03-25 21:02:16 +0300 | [diff] [blame] | 431 | size_t pos; |
| 432 | int ret; |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 433 | |
Ilya Dryomov | ff40f9a | 2015-03-25 21:02:16 +0300 | [diff] [blame] | 434 | /* a comma between MNT/MS and client options */ |
| 435 | seq_putc(m, ','); |
| 436 | pos = m->count; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 437 | |
Ilya Dryomov | ff40f9a | 2015-03-25 21:02:16 +0300 | [diff] [blame] | 438 | ret = ceph_print_client_options(m, fsc->client); |
| 439 | if (ret) |
| 440 | return ret; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 441 | |
Ilya Dryomov | ff40f9a | 2015-03-25 21:02:16 +0300 | [diff] [blame] | 442 | /* retract our comma if no client options */ |
| 443 | if (m->count == pos) |
| 444 | m->count--; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 445 | |
| 446 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) |
| 447 | seq_puts(m, ",dirstat"); |
Yan, Zheng | 133e915 | 2016-01-25 10:44:33 +0800 | [diff] [blame] | 448 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES)) |
| 449 | seq_puts(m, ",rbytes"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 450 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 451 | seq_puts(m, ",noasyncreaddir"); |
Ilya Dryomov | ff7eeb8 | 2015-03-25 21:10:09 +0300 | [diff] [blame] | 452 | if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0) |
Sage Weil | a40dc6c | 2012-01-10 09:12:55 -0800 | [diff] [blame] | 453 | seq_puts(m, ",nodcache"); |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 454 | if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) |
| 455 | seq_puts(m, ",fsc"); |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 456 | if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM) |
| 457 | seq_puts(m, ",nopoolperm"); |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 458 | |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 459 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
| 460 | if (fsopt->sb_flags & MS_POSIXACL) |
| 461 | seq_puts(m, ",acl"); |
| 462 | else |
| 463 | seq_puts(m, ",noacl"); |
| 464 | #endif |
| 465 | |
Yan, Zheng | 235a098 | 2016-03-30 17:18:34 +0800 | [diff] [blame^] | 466 | if (fsopt->mds_namespace != CEPH_FS_CLUSTER_ID_NONE) |
| 467 | seq_printf(m, ",mds_namespace=%d", fsopt->mds_namespace); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 468 | if (fsopt->wsize) |
| 469 | seq_printf(m, ",wsize=%d", fsopt->wsize); |
Sage Weil | 80456f8 | 2011-03-10 13:33:26 -0800 | [diff] [blame] | 470 | if (fsopt->rsize != CEPH_RSIZE_DEFAULT) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 471 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
Sage Weil | 83817e3 | 2011-08-04 08:03:44 -0700 | [diff] [blame] | 472 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
Sage Weil | 2151937 | 2011-12-01 08:06:52 -0800 | [diff] [blame] | 473 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 474 | if (fsopt->congestion_kb != default_congestion_kb()) |
| 475 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); |
| 476 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 477 | seq_printf(m, ",caps_wanted_delay_min=%d", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 478 | fsopt->caps_wanted_delay_min); |
| 479 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 480 | seq_printf(m, ",caps_wanted_delay_max=%d", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 481 | fsopt->caps_wanted_delay_max); |
| 482 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 483 | seq_printf(m, ",cap_release_safety=%d", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 484 | fsopt->cap_release_safety); |
| 485 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) |
| 486 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); |
| 487 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) |
| 488 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); |
| 489 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) |
Kees Cook | a068acf | 2015-09-04 15:44:57 -0700 | [diff] [blame] | 490 | seq_show_option(m, "snapdirname", fsopt->snapdir_name); |
Ilya Dryomov | ff40f9a | 2015-03-25 21:02:16 +0300 | [diff] [blame] | 491 | |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 492 | return 0; |
| 493 | } |
| 494 | |
| 495 | /* |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 496 | * handle any mon messages the standard library doesn't understand. |
| 497 | * return error if we don't either. |
| 498 | */ |
| 499 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
| 500 | { |
| 501 | struct ceph_fs_client *fsc = client->private; |
| 502 | int type = le16_to_cpu(msg->hdr.type); |
| 503 | |
| 504 | switch (type) { |
| 505 | case CEPH_MSG_MDS_MAP: |
| 506 | ceph_mdsc_handle_map(fsc->mdsc, msg); |
| 507 | return 0; |
| 508 | |
| 509 | default: |
| 510 | return -1; |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | /* |
| 515 | * create a new fs client |
| 516 | */ |
H Hartley Sweeten | 0c6d4b4e2 | 2011-09-23 11:53:30 -0700 | [diff] [blame] | 517 | static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 518 | struct ceph_options *opt) |
| 519 | { |
| 520 | struct ceph_fs_client *fsc; |
Ilya Dryomov | 12b4629 | 2013-12-24 21:19:23 +0200 | [diff] [blame] | 521 | const u64 supported_features = |
Sage Weil | 6ab00d4 | 2011-08-09 09:41:59 -0700 | [diff] [blame] | 522 | CEPH_FEATURE_FLOCK | |
Yan, Zheng | 65a2266 | 2014-11-17 10:01:03 +0800 | [diff] [blame] | 523 | CEPH_FEATURE_DIRLAYOUTHASH | |
| 524 | CEPH_FEATURE_MDS_INLINE_DATA; |
Ilya Dryomov | 12b4629 | 2013-12-24 21:19:23 +0200 | [diff] [blame] | 525 | const u64 required_features = 0; |
Alex Elder | 3bf5333 | 2013-04-01 10:48:40 -0500 | [diff] [blame] | 526 | int page_count; |
| 527 | size_t size; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 528 | int err = -ENOMEM; |
| 529 | |
| 530 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
| 531 | if (!fsc) |
| 532 | return ERR_PTR(-ENOMEM); |
| 533 | |
Sage Weil | 6ab00d4 | 2011-08-09 09:41:59 -0700 | [diff] [blame] | 534 | fsc->client = ceph_create_client(opt, fsc, supported_features, |
| 535 | required_features); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 536 | if (IS_ERR(fsc->client)) { |
| 537 | err = PTR_ERR(fsc->client); |
| 538 | goto fail; |
| 539 | } |
| 540 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; |
Yan, Zheng | 235a098 | 2016-03-30 17:18:34 +0800 | [diff] [blame^] | 541 | fsc->client->monc.fs_cluster_id = fsopt->mds_namespace; |
Ilya Dryomov | 82dcaba | 2016-01-19 16:19:06 +0100 | [diff] [blame] | 542 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, 0, true); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 543 | |
| 544 | fsc->mount_options = fsopt; |
| 545 | |
| 546 | fsc->sb = NULL; |
| 547 | fsc->mount_state = CEPH_MOUNT_MOUNTING; |
| 548 | |
| 549 | atomic_long_set(&fsc->writeback_count, 0); |
| 550 | |
| 551 | err = bdi_init(&fsc->backing_dev_info); |
| 552 | if (err < 0) |
| 553 | goto fail_client; |
| 554 | |
| 555 | err = -ENOMEM; |
Tejun Heo | 01e6acc | 2011-01-03 14:49:45 +0100 | [diff] [blame] | 556 | /* |
| 557 | * The number of concurrent works can be high but they don't need |
| 558 | * to be processed in parallel, limit concurrency. |
| 559 | */ |
| 560 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 561 | if (fsc->wb_wq == NULL) |
| 562 | goto fail_bdi; |
Tejun Heo | 01e6acc | 2011-01-03 14:49:45 +0100 | [diff] [blame] | 563 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 564 | if (fsc->pg_inv_wq == NULL) |
| 565 | goto fail_wb_wq; |
Tejun Heo | 01e6acc | 2011-01-03 14:49:45 +0100 | [diff] [blame] | 566 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 567 | if (fsc->trunc_wq == NULL) |
| 568 | goto fail_pg_inv_wq; |
| 569 | |
| 570 | /* set up mempools */ |
| 571 | err = -ENOMEM; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 572 | page_count = fsc->mount_options->wsize >> PAGE_SHIFT; |
Alex Elder | 3bf5333 | 2013-04-01 10:48:40 -0500 | [diff] [blame] | 573 | size = sizeof (struct page *) * (page_count ? page_count : 1); |
| 574 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 575 | if (!fsc->wb_pagevec_pool) |
| 576 | goto fail_trunc_wq; |
| 577 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 578 | /* setup fscache */ |
| 579 | if ((fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) && |
| 580 | (ceph_fscache_register_fs(fsc) != 0)) |
| 581 | goto fail_fscache; |
| 582 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 583 | /* caps */ |
| 584 | fsc->min_caps = fsopt->max_readdir; |
| 585 | |
| 586 | return fsc; |
| 587 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 588 | fail_fscache: |
| 589 | ceph_fscache_unregister_fs(fsc); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 590 | fail_trunc_wq: |
| 591 | destroy_workqueue(fsc->trunc_wq); |
| 592 | fail_pg_inv_wq: |
| 593 | destroy_workqueue(fsc->pg_inv_wq); |
| 594 | fail_wb_wq: |
| 595 | destroy_workqueue(fsc->wb_wq); |
| 596 | fail_bdi: |
| 597 | bdi_destroy(&fsc->backing_dev_info); |
| 598 | fail_client: |
| 599 | ceph_destroy_client(fsc->client); |
| 600 | fail: |
| 601 | kfree(fsc); |
| 602 | return ERR_PTR(err); |
| 603 | } |
| 604 | |
H Hartley Sweeten | 0c6d4b4e2 | 2011-09-23 11:53:30 -0700 | [diff] [blame] | 605 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 606 | { |
| 607 | dout("destroy_fs_client %p\n", fsc); |
| 608 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 609 | ceph_fscache_unregister_fs(fsc); |
| 610 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 611 | destroy_workqueue(fsc->wb_wq); |
| 612 | destroy_workqueue(fsc->pg_inv_wq); |
| 613 | destroy_workqueue(fsc->trunc_wq); |
| 614 | |
| 615 | bdi_destroy(&fsc->backing_dev_info); |
| 616 | |
| 617 | mempool_destroy(fsc->wb_pagevec_pool); |
| 618 | |
| 619 | destroy_mount_options(fsc->mount_options); |
| 620 | |
| 621 | ceph_fs_debugfs_cleanup(fsc); |
| 622 | |
| 623 | ceph_destroy_client(fsc->client); |
| 624 | |
| 625 | kfree(fsc); |
| 626 | dout("destroy_fs_client %p done\n", fsc); |
| 627 | } |
| 628 | |
| 629 | /* |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 630 | * caches |
| 631 | */ |
| 632 | struct kmem_cache *ceph_inode_cachep; |
| 633 | struct kmem_cache *ceph_cap_cachep; |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 634 | struct kmem_cache *ceph_cap_flush_cachep; |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 635 | struct kmem_cache *ceph_dentry_cachep; |
| 636 | struct kmem_cache *ceph_file_cachep; |
| 637 | |
| 638 | static void ceph_inode_init_once(void *foo) |
| 639 | { |
| 640 | struct ceph_inode_info *ci = foo; |
| 641 | inode_init_once(&ci->vfs_inode); |
| 642 | } |
| 643 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 644 | static int __init init_caches(void) |
| 645 | { |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 646 | int error = -ENOMEM; |
| 647 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 648 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", |
| 649 | sizeof(struct ceph_inode_info), |
| 650 | __alignof__(struct ceph_inode_info), |
Vladimir Davydov | 5d09705 | 2016-01-14 15:18:21 -0800 | [diff] [blame] | 651 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| |
| 652 | SLAB_ACCOUNT, ceph_inode_init_once); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 653 | if (ceph_inode_cachep == NULL) |
| 654 | return -ENOMEM; |
| 655 | |
| 656 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, |
| 657 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); |
| 658 | if (ceph_cap_cachep == NULL) |
| 659 | goto bad_cap; |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 660 | ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush, |
| 661 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); |
| 662 | if (ceph_cap_flush_cachep == NULL) |
| 663 | goto bad_cap_flush; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 664 | |
| 665 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, |
| 666 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); |
| 667 | if (ceph_dentry_cachep == NULL) |
| 668 | goto bad_dentry; |
| 669 | |
| 670 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, |
| 671 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); |
| 672 | if (ceph_file_cachep == NULL) |
| 673 | goto bad_file; |
| 674 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 675 | if ((error = ceph_fscache_register())) |
| 676 | goto bad_file; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 677 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 678 | return 0; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 679 | bad_file: |
| 680 | kmem_cache_destroy(ceph_dentry_cachep); |
| 681 | bad_dentry: |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 682 | kmem_cache_destroy(ceph_cap_flush_cachep); |
| 683 | bad_cap_flush: |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 684 | kmem_cache_destroy(ceph_cap_cachep); |
| 685 | bad_cap: |
| 686 | kmem_cache_destroy(ceph_inode_cachep); |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 687 | return error; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 688 | } |
| 689 | |
| 690 | static void destroy_caches(void) |
| 691 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 692 | /* |
| 693 | * Make sure all delayed rcu free inodes are flushed before we |
| 694 | * destroy cache. |
| 695 | */ |
| 696 | rcu_barrier(); |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 697 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 698 | kmem_cache_destroy(ceph_inode_cachep); |
| 699 | kmem_cache_destroy(ceph_cap_cachep); |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 700 | kmem_cache_destroy(ceph_cap_flush_cachep); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 701 | kmem_cache_destroy(ceph_dentry_cachep); |
| 702 | kmem_cache_destroy(ceph_file_cachep); |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 703 | |
| 704 | ceph_fscache_unregister(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 705 | } |
| 706 | |
| 707 | |
| 708 | /* |
| 709 | * ceph_umount_begin - initiate forced umount. Tear down down the |
| 710 | * mount, skipping steps that may hang while waiting for server(s). |
| 711 | */ |
| 712 | static void ceph_umount_begin(struct super_block *sb) |
| 713 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 714 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 715 | |
| 716 | dout("ceph_umount_begin - starting forced umount\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 717 | if (!fsc) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 718 | return; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 719 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; |
Yan, Zheng | 48fec5d | 2015-07-01 16:27:46 +0800 | [diff] [blame] | 720 | ceph_mdsc_force_umount(fsc->mdsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 721 | return; |
| 722 | } |
| 723 | |
| 724 | static const struct super_operations ceph_super_ops = { |
| 725 | .alloc_inode = ceph_alloc_inode, |
| 726 | .destroy_inode = ceph_destroy_inode, |
| 727 | .write_inode = ceph_write_inode, |
Yan, Zheng | 9f12bd1 | 2013-09-20 19:55:31 +0800 | [diff] [blame] | 728 | .drop_inode = ceph_drop_inode, |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 729 | .sync_fs = ceph_sync_fs, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 730 | .put_super = ceph_put_super, |
| 731 | .show_options = ceph_show_options, |
| 732 | .statfs = ceph_statfs, |
| 733 | .umount_begin = ceph_umount_begin, |
| 734 | }; |
| 735 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 736 | /* |
| 737 | * Bootstrap mount by opening the root directory. Note the mount |
| 738 | * @started time from caller, and time out if this takes too long. |
| 739 | */ |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 740 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 741 | const char *path, |
| 742 | unsigned long started) |
| 743 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 744 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 745 | struct ceph_mds_request *req = NULL; |
| 746 | int err; |
| 747 | struct dentry *root; |
| 748 | |
| 749 | /* open dir */ |
| 750 | dout("open_root_inode opening '%s'\n", path); |
| 751 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); |
| 752 | if (IS_ERR(req)) |
Julia Lawall | 7e34bc5 | 2010-05-22 12:01:14 +0200 | [diff] [blame] | 753 | return ERR_CAST(req); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 754 | req->r_path1 = kstrdup(path, GFP_NOFS); |
Sanidhya Kashyap | a149bb9 | 2015-03-21 12:54:58 -0400 | [diff] [blame] | 755 | if (!req->r_path1) { |
| 756 | root = ERR_PTR(-ENOMEM); |
| 757 | goto out; |
| 758 | } |
| 759 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 760 | req->r_ino1.ino = CEPH_INO_ROOT; |
| 761 | req->r_ino1.snap = CEPH_NOSNAP; |
| 762 | req->r_started = started; |
Ilya Dryomov | a319bf5 | 2015-05-15 12:02:17 +0300 | [diff] [blame] | 763 | req->r_timeout = fsc->client->options->mount_timeout; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 764 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
| 765 | req->r_num_caps = 2; |
| 766 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
| 767 | if (err == 0) { |
Al Viro | 3c5184e | 2012-01-09 16:34:32 -0500 | [diff] [blame] | 768 | struct inode *inode = req->r_target_inode; |
| 769 | req->r_target_inode = NULL; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 770 | dout("open_root_inode success\n"); |
Al Viro | 3c5184e | 2012-01-09 16:34:32 -0500 | [diff] [blame] | 771 | if (ceph_ino(inode) == CEPH_INO_ROOT && |
Sage Weil | 774ac21 | 2011-11-11 09:48:08 -0800 | [diff] [blame] | 772 | fsc->sb->s_root == NULL) { |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame] | 773 | root = d_make_root(inode); |
Al Viro | 3c5184e | 2012-01-09 16:34:32 -0500 | [diff] [blame] | 774 | if (!root) { |
Al Viro | 3c5184e | 2012-01-09 16:34:32 -0500 | [diff] [blame] | 775 | root = ERR_PTR(-ENOMEM); |
| 776 | goto out; |
| 777 | } |
Sage Weil | 774ac21 | 2011-11-11 09:48:08 -0800 | [diff] [blame] | 778 | } else { |
J. Bruce Fields | 1a0a397 | 2014-02-14 17:35:37 -0500 | [diff] [blame] | 779 | root = d_obtain_root(inode); |
Sage Weil | 774ac21 | 2011-11-11 09:48:08 -0800 | [diff] [blame] | 780 | } |
Linus Torvalds | 1a52bb0 | 2012-01-13 10:29:21 -0800 | [diff] [blame] | 781 | ceph_init_dentry(root); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 782 | dout("open_root_inode success, root dentry is %p\n", root); |
| 783 | } else { |
| 784 | root = ERR_PTR(err); |
| 785 | } |
Al Viro | 3c5184e | 2012-01-09 16:34:32 -0500 | [diff] [blame] | 786 | out: |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 787 | ceph_mdsc_put_request(req); |
| 788 | return root; |
| 789 | } |
| 790 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 791 | |
| 792 | |
| 793 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 794 | /* |
| 795 | * mount: join the ceph cluster, and open root directory. |
| 796 | */ |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 797 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 798 | const char *path) |
| 799 | { |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 800 | int err; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 801 | unsigned long started = jiffies; /* note the start time */ |
| 802 | struct dentry *root; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 803 | int first = 0; /* first vfsmount for this super_block */ |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 804 | |
Yan, Zheng | 132ca7e | 2016-03-12 13:20:48 +0800 | [diff] [blame] | 805 | dout("mount start %p\n", fsc); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 806 | mutex_lock(&fsc->client->mount_mutex); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 807 | |
Yan, Zheng | 132ca7e | 2016-03-12 13:20:48 +0800 | [diff] [blame] | 808 | if (!fsc->sb->s_root) { |
| 809 | err = __ceph_open_session(fsc->client, started); |
| 810 | if (err < 0) |
| 811 | goto out; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 812 | |
Yan, Zheng | 132ca7e | 2016-03-12 13:20:48 +0800 | [diff] [blame] | 813 | dout("mount opening root\n"); |
| 814 | root = open_root_dentry(fsc, "", started); |
| 815 | if (IS_ERR(root)) { |
| 816 | err = PTR_ERR(root); |
| 817 | goto out; |
| 818 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 819 | fsc->sb->s_root = root; |
| 820 | first = 1; |
| 821 | |
| 822 | err = ceph_fs_debugfs_init(fsc); |
| 823 | if (err < 0) |
| 824 | goto fail; |
| 825 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 826 | |
| 827 | if (path[0] == 0) { |
Yan, Zheng | 132ca7e | 2016-03-12 13:20:48 +0800 | [diff] [blame] | 828 | root = fsc->sb->s_root; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 829 | dget(root); |
| 830 | } else { |
| 831 | dout("mount opening base mountpoint\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 832 | root = open_root_dentry(fsc, path, started); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 833 | if (IS_ERR(root)) { |
| 834 | err = PTR_ERR(root); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 835 | goto fail; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 836 | } |
| 837 | } |
| 838 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 839 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 840 | dout("mount success\n"); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 841 | mutex_unlock(&fsc->client->mount_mutex); |
| 842 | return root; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 843 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 844 | fail: |
| 845 | if (first) { |
| 846 | dput(fsc->sb->s_root); |
| 847 | fsc->sb->s_root = NULL; |
| 848 | } |
Yan, Zheng | 132ca7e | 2016-03-12 13:20:48 +0800 | [diff] [blame] | 849 | out: |
| 850 | mutex_unlock(&fsc->client->mount_mutex); |
| 851 | return ERR_PTR(err); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 852 | } |
| 853 | |
| 854 | static int ceph_set_super(struct super_block *s, void *data) |
| 855 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 856 | struct ceph_fs_client *fsc = data; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 857 | int ret; |
| 858 | |
| 859 | dout("set_super %p data %p\n", s, data); |
| 860 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 861 | s->s_flags = fsc->mount_options->sb_flags; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 862 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
| 863 | |
Guangliang Zhao | 7221fe4 | 2013-11-11 15:18:03 +0800 | [diff] [blame] | 864 | s->s_xattr = ceph_xattr_handlers; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 865 | s->s_fs_info = fsc; |
| 866 | fsc->sb = s; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 867 | |
| 868 | s->s_op = &ceph_super_ops; |
| 869 | s->s_export_op = &ceph_export_ops; |
| 870 | |
| 871 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ |
| 872 | |
| 873 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ |
| 874 | if (ret != 0) |
| 875 | goto fail; |
| 876 | |
| 877 | return ret; |
| 878 | |
| 879 | fail: |
| 880 | s->s_fs_info = NULL; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 881 | fsc->sb = NULL; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 882 | return ret; |
| 883 | } |
| 884 | |
| 885 | /* |
| 886 | * share superblock if same fs AND options |
| 887 | */ |
| 888 | static int ceph_compare_super(struct super_block *sb, void *data) |
| 889 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 890 | struct ceph_fs_client *new = data; |
| 891 | struct ceph_mount_options *fsopt = new->mount_options; |
| 892 | struct ceph_options *opt = new->client->options; |
| 893 | struct ceph_fs_client *other = ceph_sb_to_client(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 894 | |
| 895 | dout("ceph_compare_super %p\n", sb); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 896 | |
| 897 | if (compare_mount_options(fsopt, opt, other)) { |
| 898 | dout("monitor(s)/mount options don't match\n"); |
| 899 | return 0; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 900 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 901 | if ((opt->flags & CEPH_OPT_FSID) && |
| 902 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { |
| 903 | dout("fsid doesn't match\n"); |
| 904 | return 0; |
| 905 | } |
| 906 | if (fsopt->sb_flags != other->mount_options->sb_flags) { |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 907 | dout("flags differ\n"); |
| 908 | return 0; |
| 909 | } |
| 910 | return 1; |
| 911 | } |
| 912 | |
| 913 | /* |
| 914 | * construct our own bdi so we can control readahead, etc. |
| 915 | */ |
Jeff Mahoney | 00d5643 | 2010-06-10 11:13:58 -0400 | [diff] [blame] | 916 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
Sage Weil | 31e0cf8 | 2010-05-04 16:39:35 -0700 | [diff] [blame] | 917 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 918 | static int ceph_register_bdi(struct super_block *sb, |
| 919 | struct ceph_fs_client *fsc) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 920 | { |
| 921 | int err; |
| 922 | |
Sage Weil | 83817e3 | 2011-08-04 08:03:44 -0700 | [diff] [blame] | 923 | /* set ra_pages based on rasize mount option? */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 924 | if (fsc->mount_options->rasize >= PAGE_SIZE) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 925 | fsc->backing_dev_info.ra_pages = |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 926 | (fsc->mount_options->rasize + PAGE_SIZE - 1) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 927 | >> PAGE_SHIFT; |
Yehuda Sadeh | e985222 | 2011-07-22 11:12:28 -0700 | [diff] [blame] | 928 | else |
| 929 | fsc->backing_dev_info.ra_pages = |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 930 | VM_MAX_READAHEAD * 1024 / PAGE_SIZE; |
Yehuda Sadeh | e985222 | 2011-07-22 11:12:28 -0700 | [diff] [blame] | 931 | |
Joe Perches | d2cc4dd | 2012-11-29 08:37:03 -0600 | [diff] [blame] | 932 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld", |
Sage Weil | 31e0cf8 | 2010-05-04 16:39:35 -0700 | [diff] [blame] | 933 | atomic_long_inc_return(&bdi_seq)); |
Sage Weil | 5dfc589 | 2010-05-04 16:14:46 -0700 | [diff] [blame] | 934 | if (!err) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 935 | sb->s_bdi = &fsc->backing_dev_info; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 936 | return err; |
| 937 | } |
| 938 | |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 939 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
| 940 | int flags, const char *dev_name, void *data) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 941 | { |
| 942 | struct super_block *sb; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 943 | struct ceph_fs_client *fsc; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 944 | struct dentry *res; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 945 | int err; |
| 946 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; |
Sage Weil | 6a18be1 | 2009-11-04 11:40:05 -0800 | [diff] [blame] | 947 | const char *path = NULL; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 948 | struct ceph_mount_options *fsopt = NULL; |
| 949 | struct ceph_options *opt = NULL; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 950 | |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 951 | dout("ceph_mount\n"); |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 952 | |
| 953 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
| 954 | flags |= MS_POSIXACL; |
| 955 | #endif |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 956 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 957 | if (err < 0) { |
| 958 | res = ERR_PTR(err); |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 959 | goto out_final; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 960 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 961 | |
| 962 | /* create client (which we may/may not use) */ |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 963 | fsc = create_fs_client(fsopt, opt); |
| 964 | if (IS_ERR(fsc)) { |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 965 | res = ERR_CAST(fsc); |
Noah Watkins | 259a187 | 2011-08-22 13:49:41 -0600 | [diff] [blame] | 966 | destroy_mount_options(fsopt); |
| 967 | ceph_destroy_options(opt); |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 968 | goto out_final; |
| 969 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 970 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 971 | err = ceph_mdsc_init(fsc); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 972 | if (err < 0) { |
| 973 | res = ERR_PTR(err); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 974 | goto out; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 975 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 976 | |
| 977 | if (ceph_test_opt(fsc->client, NOSHARE)) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 978 | compare_super = NULL; |
David Howells | 9249e17 | 2012-06-25 12:55:37 +0100 | [diff] [blame] | 979 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 980 | if (IS_ERR(sb)) { |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 981 | res = ERR_CAST(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 982 | goto out; |
| 983 | } |
| 984 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 985 | if (ceph_sb_to_client(sb) != fsc) { |
| 986 | ceph_mdsc_destroy(fsc); |
| 987 | destroy_fs_client(fsc); |
| 988 | fsc = ceph_sb_to_client(sb); |
| 989 | dout("get_sb got existing client %p\n", fsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 990 | } else { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 991 | dout("get_sb using new client %p\n", fsc); |
| 992 | err = ceph_register_bdi(sb, fsc); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 993 | if (err < 0) { |
| 994 | res = ERR_PTR(err); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 995 | goto out_splat; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 996 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 997 | } |
| 998 | |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 999 | res = ceph_real_mount(fsc, path); |
| 1000 | if (IS_ERR(res)) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1001 | goto out_splat; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1002 | dout("root %p inode %p ino %llx.%llx\n", res, |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1003 | d_inode(res), ceph_vinop(d_inode(res))); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1004 | return res; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1005 | |
| 1006 | out_splat: |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1007 | ceph_mdsc_close_sessions(fsc->mdsc); |
Al Viro | 3981f2e | 2010-03-21 19:22:29 -0400 | [diff] [blame] | 1008 | deactivate_locked_super(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1009 | goto out_final; |
| 1010 | |
| 1011 | out: |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1012 | ceph_mdsc_destroy(fsc); |
| 1013 | destroy_fs_client(fsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1014 | out_final: |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1015 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
| 1016 | return res; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1017 | } |
| 1018 | |
| 1019 | static void ceph_kill_sb(struct super_block *s) |
| 1020 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1021 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
Christoph Hellwig | e4d2750 | 2015-01-14 10:42:38 +0100 | [diff] [blame] | 1022 | dev_t dev = s->s_dev; |
| 1023 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1024 | dout("kill_sb %p\n", s); |
Christoph Hellwig | e4d2750 | 2015-01-14 10:42:38 +0100 | [diff] [blame] | 1025 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1026 | ceph_mdsc_pre_umount(fsc->mdsc); |
Christoph Hellwig | e4d2750 | 2015-01-14 10:42:38 +0100 | [diff] [blame] | 1027 | generic_shutdown_super(s); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1028 | ceph_mdsc_destroy(fsc); |
Christoph Hellwig | e4d2750 | 2015-01-14 10:42:38 +0100 | [diff] [blame] | 1029 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1030 | destroy_fs_client(fsc); |
Christoph Hellwig | e4d2750 | 2015-01-14 10:42:38 +0100 | [diff] [blame] | 1031 | free_anon_bdev(dev); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1032 | } |
| 1033 | |
| 1034 | static struct file_system_type ceph_fs_type = { |
| 1035 | .owner = THIS_MODULE, |
| 1036 | .name = "ceph", |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1037 | .mount = ceph_mount, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1038 | .kill_sb = ceph_kill_sb, |
| 1039 | .fs_flags = FS_RENAME_DOES_D_MOVE, |
| 1040 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 1041 | MODULE_ALIAS_FS("ceph"); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1042 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1043 | static int __init init_ceph(void) |
| 1044 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1045 | int ret = init_caches(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1046 | if (ret) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1047 | goto out; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1048 | |
Yan, Zheng | eb13e83 | 2014-03-09 23:16:40 +0800 | [diff] [blame] | 1049 | ceph_flock_init(); |
Alex Elder | 3ce6cd1 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 1050 | ceph_xattr_init(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1051 | ret = register_filesystem(&ceph_fs_type); |
| 1052 | if (ret) |
Ilya Dryomov | 34b759b | 2016-02-16 15:00:24 +0100 | [diff] [blame] | 1053 | goto out_xattr; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1054 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1055 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
| 1056 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1057 | return 0; |
| 1058 | |
Yan, Zheng | 97c85a8 | 2014-11-06 15:09:41 +0800 | [diff] [blame] | 1059 | out_xattr: |
Alex Elder | 3ce6cd1 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 1060 | ceph_xattr_exit(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1061 | destroy_caches(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1062 | out: |
| 1063 | return ret; |
| 1064 | } |
| 1065 | |
| 1066 | static void __exit exit_ceph(void) |
| 1067 | { |
| 1068 | dout("exit_ceph\n"); |
| 1069 | unregister_filesystem(&ceph_fs_type); |
Alex Elder | 3ce6cd1 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 1070 | ceph_xattr_exit(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1071 | destroy_caches(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1072 | } |
| 1073 | |
| 1074 | module_init(init_ceph); |
| 1075 | module_exit(exit_ceph); |
| 1076 | |
| 1077 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); |
| 1078 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); |
| 1079 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); |
| 1080 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); |
| 1081 | MODULE_LICENSE("GPL"); |