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 | |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 88 | static int ceph_sync_fs(struct super_block *sb, int wait) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 89 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 90 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 91 | |
| 92 | if (!wait) { |
| 93 | dout("sync_fs (non-blocking)\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 94 | ceph_flush_dirty_caps(fsc->mdsc); |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 95 | dout("sync_fs (non-blocking) done\n"); |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | dout("sync_fs (blocking)\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 100 | ceph_osdc_sync(&fsc->client->osdc); |
| 101 | ceph_mdsc_sync(fsc->mdsc); |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 102 | dout("sync_fs (blocking) done\n"); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 103 | return 0; |
| 104 | } |
| 105 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 106 | /* |
| 107 | * mount options |
| 108 | */ |
| 109 | enum { |
| 110 | Opt_wsize, |
| 111 | Opt_rsize, |
Sage Weil | 83817e3 | 2011-08-04 08:03:44 -0700 | [diff] [blame] | 112 | Opt_rasize, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 113 | Opt_caps_wanted_delay_min, |
| 114 | Opt_caps_wanted_delay_max, |
| 115 | Opt_cap_release_safety, |
| 116 | Opt_readdir_max_entries, |
| 117 | Opt_readdir_max_bytes, |
| 118 | Opt_congestion_kb, |
| 119 | Opt_last_int, |
| 120 | /* int args above */ |
| 121 | Opt_snapdirname, |
Yan, Zheng | 430afba | 2016-07-08 11:25:38 +0800 | [diff] [blame] | 122 | Opt_mds_namespace, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 123 | Opt_last_string, |
| 124 | /* string args above */ |
| 125 | Opt_dirstat, |
| 126 | Opt_nodirstat, |
| 127 | Opt_rbytes, |
| 128 | Opt_norbytes, |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 129 | Opt_asyncreaddir, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 130 | Opt_noasyncreaddir, |
Sage Weil | a40dc6c | 2012-01-10 09:12:55 -0800 | [diff] [blame] | 131 | Opt_dcache, |
| 132 | Opt_nodcache, |
Yehuda Sadeh | ad1fee9 | 2011-01-21 16:44:03 -0800 | [diff] [blame] | 133 | Opt_ino32, |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 134 | Opt_noino32, |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 135 | Opt_fscache, |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 136 | Opt_nofscache, |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 137 | Opt_poolperm, |
| 138 | Opt_nopoolperm, |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 139 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
| 140 | Opt_acl, |
| 141 | #endif |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 142 | Opt_noacl, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 143 | }; |
| 144 | |
| 145 | static match_table_t fsopt_tokens = { |
| 146 | {Opt_wsize, "wsize=%d"}, |
| 147 | {Opt_rsize, "rsize=%d"}, |
Sage Weil | 83817e3 | 2011-08-04 08:03:44 -0700 | [diff] [blame] | 148 | {Opt_rasize, "rasize=%d"}, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 149 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
| 150 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, |
| 151 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
| 152 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
| 153 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
| 154 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
| 155 | /* int args above */ |
| 156 | {Opt_snapdirname, "snapdirname=%s"}, |
Yan, Zheng | 430afba | 2016-07-08 11:25:38 +0800 | [diff] [blame] | 157 | {Opt_mds_namespace, "mds_namespace=%s"}, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 158 | /* string args above */ |
| 159 | {Opt_dirstat, "dirstat"}, |
| 160 | {Opt_nodirstat, "nodirstat"}, |
| 161 | {Opt_rbytes, "rbytes"}, |
| 162 | {Opt_norbytes, "norbytes"}, |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 163 | {Opt_asyncreaddir, "asyncreaddir"}, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 164 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
Sage Weil | a40dc6c | 2012-01-10 09:12:55 -0800 | [diff] [blame] | 165 | {Opt_dcache, "dcache"}, |
| 166 | {Opt_nodcache, "nodcache"}, |
Yehuda Sadeh | ad1fee9 | 2011-01-21 16:44:03 -0800 | [diff] [blame] | 167 | {Opt_ino32, "ino32"}, |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 168 | {Opt_noino32, "noino32"}, |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 169 | {Opt_fscache, "fsc"}, |
| 170 | {Opt_nofscache, "nofsc"}, |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 171 | {Opt_poolperm, "poolperm"}, |
| 172 | {Opt_nopoolperm, "nopoolperm"}, |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 173 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
| 174 | {Opt_acl, "acl"}, |
| 175 | #endif |
| 176 | {Opt_noacl, "noacl"}, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 177 | {-1, NULL} |
| 178 | }; |
| 179 | |
| 180 | static int parse_fsopt_token(char *c, void *private) |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 181 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 182 | struct ceph_mount_options *fsopt = private; |
| 183 | substring_t argstr[MAX_OPT_ARGS]; |
| 184 | int token, intval, ret; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 185 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 186 | token = match_token((char *)c, fsopt_tokens, argstr); |
| 187 | if (token < 0) |
| 188 | return -EINVAL; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 189 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 190 | if (token < Opt_last_int) { |
| 191 | ret = match_int(&argstr[0], &intval); |
| 192 | if (ret < 0) { |
| 193 | pr_err("bad mount option arg (not int) " |
| 194 | "at '%s'\n", c); |
| 195 | return ret; |
| 196 | } |
| 197 | dout("got int token %d val %d\n", token, intval); |
| 198 | } else if (token > Opt_last_int && token < Opt_last_string) { |
| 199 | dout("got string token %d val %s\n", token, |
| 200 | argstr[0].from); |
| 201 | } else { |
| 202 | dout("got token %d\n", token); |
| 203 | } |
| 204 | |
| 205 | switch (token) { |
| 206 | case Opt_snapdirname: |
| 207 | kfree(fsopt->snapdir_name); |
| 208 | fsopt->snapdir_name = kstrndup(argstr[0].from, |
| 209 | argstr[0].to-argstr[0].from, |
| 210 | GFP_KERNEL); |
| 211 | if (!fsopt->snapdir_name) |
| 212 | return -ENOMEM; |
| 213 | break; |
Yan, Zheng | 235a098 | 2016-03-30 17:18:34 +0800 | [diff] [blame] | 214 | case Opt_mds_namespace: |
Yan, Zheng | 430afba | 2016-07-08 11:25:38 +0800 | [diff] [blame] | 215 | fsopt->mds_namespace = kstrndup(argstr[0].from, |
| 216 | argstr[0].to-argstr[0].from, |
| 217 | GFP_KERNEL); |
| 218 | if (!fsopt->mds_namespace) |
| 219 | return -ENOMEM; |
Yan, Zheng | 235a098 | 2016-03-30 17:18:34 +0800 | [diff] [blame] | 220 | break; |
Yan, Zheng | 430afba | 2016-07-08 11:25:38 +0800 | [diff] [blame] | 221 | /* misc */ |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 222 | case Opt_wsize: |
| 223 | fsopt->wsize = intval; |
| 224 | break; |
| 225 | case Opt_rsize: |
| 226 | fsopt->rsize = intval; |
| 227 | break; |
Sage Weil | 83817e3 | 2011-08-04 08:03:44 -0700 | [diff] [blame] | 228 | case Opt_rasize: |
| 229 | fsopt->rasize = intval; |
| 230 | break; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 231 | case Opt_caps_wanted_delay_min: |
| 232 | fsopt->caps_wanted_delay_min = intval; |
| 233 | break; |
| 234 | case Opt_caps_wanted_delay_max: |
| 235 | fsopt->caps_wanted_delay_max = intval; |
| 236 | break; |
| 237 | case Opt_readdir_max_entries: |
| 238 | fsopt->max_readdir = intval; |
| 239 | break; |
| 240 | case Opt_readdir_max_bytes: |
| 241 | fsopt->max_readdir_bytes = intval; |
| 242 | break; |
| 243 | case Opt_congestion_kb: |
| 244 | fsopt->congestion_kb = intval; |
| 245 | break; |
| 246 | case Opt_dirstat: |
| 247 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; |
| 248 | break; |
| 249 | case Opt_nodirstat: |
| 250 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; |
| 251 | break; |
| 252 | case Opt_rbytes: |
| 253 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; |
| 254 | break; |
| 255 | case Opt_norbytes: |
| 256 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; |
| 257 | break; |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 258 | case Opt_asyncreaddir: |
| 259 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; |
| 260 | break; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 261 | case Opt_noasyncreaddir: |
| 262 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; |
| 263 | break; |
Sage Weil | a40dc6c | 2012-01-10 09:12:55 -0800 | [diff] [blame] | 264 | case Opt_dcache: |
| 265 | fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; |
| 266 | break; |
| 267 | case Opt_nodcache: |
| 268 | fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; |
| 269 | break; |
Yehuda Sadeh | ad1fee9 | 2011-01-21 16:44:03 -0800 | [diff] [blame] | 270 | case Opt_ino32: |
| 271 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; |
| 272 | break; |
Alex Elder | cffaba1 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 273 | case Opt_noino32: |
| 274 | fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; |
| 275 | break; |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 276 | case Opt_fscache: |
| 277 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; |
| 278 | break; |
| 279 | case Opt_nofscache: |
| 280 | fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; |
| 281 | break; |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 282 | case Opt_poolperm: |
| 283 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; |
| 284 | printk ("pool perm"); |
| 285 | break; |
| 286 | case Opt_nopoolperm: |
| 287 | fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM; |
| 288 | break; |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 289 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
| 290 | case Opt_acl: |
| 291 | fsopt->sb_flags |= MS_POSIXACL; |
| 292 | break; |
| 293 | #endif |
| 294 | case Opt_noacl: |
| 295 | fsopt->sb_flags &= ~MS_POSIXACL; |
| 296 | break; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 297 | default: |
| 298 | BUG_ON(token); |
| 299 | } |
| 300 | return 0; |
| 301 | } |
| 302 | |
| 303 | static void destroy_mount_options(struct ceph_mount_options *args) |
| 304 | { |
| 305 | dout("destroy_mount_options %p\n", args); |
| 306 | kfree(args->snapdir_name); |
Yan, Zheng | 430afba | 2016-07-08 11:25:38 +0800 | [diff] [blame] | 307 | kfree(args->mds_namespace); |
Yan, Zheng | 3f38495 | 2016-04-21 11:09:55 +0800 | [diff] [blame] | 308 | kfree(args->server_path); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 309 | kfree(args); |
| 310 | } |
| 311 | |
| 312 | static int strcmp_null(const char *s1, const char *s2) |
| 313 | { |
| 314 | if (!s1 && !s2) |
| 315 | return 0; |
| 316 | if (s1 && !s2) |
| 317 | return -1; |
| 318 | if (!s1 && s2) |
| 319 | return 1; |
| 320 | return strcmp(s1, s2); |
| 321 | } |
| 322 | |
Xiubo Li | 68d8766 | 2019-12-20 09:34:04 -0500 | [diff] [blame^] | 323 | /** |
| 324 | * path_remove_extra_slash - Remove the extra slashes in the server path |
| 325 | * @server_path: the server path and could be NULL |
| 326 | * |
| 327 | * Return NULL if the path is NULL or only consists of "/", or a string |
| 328 | * without any extra slashes including the leading slash(es) and the |
| 329 | * slash(es) at the end of the server path, such as: |
| 330 | * "//dir1////dir2///" --> "dir1/dir2" |
| 331 | */ |
| 332 | static char *path_remove_extra_slash(const char *server_path) |
| 333 | { |
| 334 | const char *path = server_path; |
| 335 | const char *cur, *end; |
| 336 | char *buf, *p; |
| 337 | int len; |
| 338 | |
| 339 | /* if the server path is omitted */ |
| 340 | if (!path) |
| 341 | return NULL; |
| 342 | |
| 343 | /* remove all the leading slashes */ |
| 344 | while (*path == '/') |
| 345 | path++; |
| 346 | |
| 347 | /* if the server path only consists of slashes */ |
| 348 | if (*path == '\0') |
| 349 | return NULL; |
| 350 | |
| 351 | len = strlen(path); |
| 352 | |
| 353 | buf = kmalloc(len + 1, GFP_KERNEL); |
| 354 | if (!buf) |
| 355 | return ERR_PTR(-ENOMEM); |
| 356 | |
| 357 | end = path + len; |
| 358 | p = buf; |
| 359 | do { |
| 360 | cur = strchr(path, '/'); |
| 361 | if (!cur) |
| 362 | cur = end; |
| 363 | |
| 364 | len = cur - path; |
| 365 | |
| 366 | /* including one '/' */ |
| 367 | if (cur != end) |
| 368 | len += 1; |
| 369 | |
| 370 | memcpy(p, path, len); |
| 371 | p += len; |
| 372 | |
| 373 | while (cur <= end && *cur == '/') |
| 374 | cur++; |
| 375 | path = cur; |
| 376 | } while (path < end); |
| 377 | |
| 378 | *p = '\0'; |
| 379 | |
| 380 | /* |
| 381 | * remove the last slash if there has and just to make sure that |
| 382 | * we will get something like "dir1/dir2" |
| 383 | */ |
| 384 | if (*(--p) == '/') |
| 385 | *p = '\0'; |
| 386 | |
| 387 | return buf; |
| 388 | } |
| 389 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 390 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
| 391 | struct ceph_options *new_opt, |
| 392 | struct ceph_fs_client *fsc) |
| 393 | { |
| 394 | struct ceph_mount_options *fsopt1 = new_fsopt; |
| 395 | struct ceph_mount_options *fsopt2 = fsc->mount_options; |
| 396 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); |
Xiubo Li | 68d8766 | 2019-12-20 09:34:04 -0500 | [diff] [blame^] | 397 | char *p1, *p2; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 398 | int ret; |
| 399 | |
| 400 | ret = memcmp(fsopt1, fsopt2, ofs); |
| 401 | if (ret) |
| 402 | return ret; |
| 403 | |
| 404 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); |
| 405 | if (ret) |
| 406 | return ret; |
Yan, Zheng | 430afba | 2016-07-08 11:25:38 +0800 | [diff] [blame] | 407 | ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace); |
| 408 | if (ret) |
| 409 | return ret; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 410 | |
Xiubo Li | 68d8766 | 2019-12-20 09:34:04 -0500 | [diff] [blame^] | 411 | p1 = path_remove_extra_slash(fsopt1->server_path); |
| 412 | if (IS_ERR(p1)) |
| 413 | return PTR_ERR(p1); |
| 414 | p2 = path_remove_extra_slash(fsopt2->server_path); |
| 415 | if (IS_ERR(p2)) { |
| 416 | kfree(p1); |
| 417 | return PTR_ERR(p2); |
| 418 | } |
| 419 | ret = strcmp_null(p1, p2); |
| 420 | kfree(p1); |
| 421 | kfree(p2); |
Yan, Zheng | 3f38495 | 2016-04-21 11:09:55 +0800 | [diff] [blame] | 422 | if (ret) |
| 423 | return ret; |
| 424 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 425 | return ceph_compare_options(new_opt, fsc->client); |
| 426 | } |
| 427 | |
| 428 | static int parse_mount_options(struct ceph_mount_options **pfsopt, |
| 429 | struct ceph_options **popt, |
| 430 | int flags, char *options, |
Yan, Zheng | 3f38495 | 2016-04-21 11:09:55 +0800 | [diff] [blame] | 431 | const char *dev_name) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 432 | { |
| 433 | struct ceph_mount_options *fsopt; |
| 434 | const char *dev_name_end; |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 435 | int err; |
| 436 | |
| 437 | if (!dev_name || !*dev_name) |
| 438 | return -EINVAL; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 439 | |
| 440 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); |
| 441 | if (!fsopt) |
| 442 | return -ENOMEM; |
| 443 | |
| 444 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); |
| 445 | |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 446 | fsopt->sb_flags = flags; |
| 447 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 448 | |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 449 | fsopt->rsize = CEPH_RSIZE_DEFAULT; |
| 450 | fsopt->rasize = CEPH_RASIZE_DEFAULT; |
| 451 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); |
Sanidhya Kashyap | a149bb9 | 2015-03-21 12:54:58 -0400 | [diff] [blame] | 452 | if (!fsopt->snapdir_name) { |
| 453 | err = -ENOMEM; |
| 454 | goto out; |
| 455 | } |
| 456 | |
Sage Weil | 50aac4f | 2011-01-18 07:59:40 -0800 | [diff] [blame] | 457 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
| 458 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 459 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
| 460 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; |
| 461 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; |
| 462 | fsopt->congestion_kb = default_congestion_kb(); |
| 463 | |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 464 | /* |
| 465 | * Distinguish the server list from the path in "dev_name". |
| 466 | * Internally we do not include the leading '/' in the path. |
| 467 | * |
| 468 | * "dev_name" will look like: |
| 469 | * <server_spec>[,<server_spec>...]:[<path>] |
| 470 | * where |
| 471 | * <server_spec> is <ip>[:<port>] |
| 472 | * <path> is optional, but if present must begin with '/' |
| 473 | */ |
| 474 | dev_name_end = strchr(dev_name, '/'); |
| 475 | if (dev_name_end) { |
Xiubo Li | 68d8766 | 2019-12-20 09:34:04 -0500 | [diff] [blame^] | 476 | /* |
| 477 | * The server_path will include the whole chars from userland |
| 478 | * including the leading '/'. |
| 479 | */ |
| 480 | fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL); |
| 481 | if (!fsopt->server_path) { |
| 482 | err = -ENOMEM; |
| 483 | goto out; |
Yan, Zheng | 3f38495 | 2016-04-21 11:09:55 +0800 | [diff] [blame] | 484 | } |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 485 | } else { |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 486 | dev_name_end = dev_name + strlen(dev_name); |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 487 | } |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 488 | err = -EINVAL; |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 489 | dev_name_end--; /* back up to ':' separator */ |
Sasha Levin | 5446429 | 2013-07-01 18:33:39 -0400 | [diff] [blame] | 490 | if (dev_name_end < dev_name || *dev_name_end != ':') { |
Alex Elder | c98f533 | 2012-08-09 10:33:26 -0700 | [diff] [blame] | 491 | pr_err("device name is missing path (no : separator in %s)\n", |
Noah Watkins | 80db8be | 2011-08-22 13:49:23 -0600 | [diff] [blame] | 492 | dev_name); |
| 493 | goto out; |
| 494 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 495 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
Yan, Zheng | 3f38495 | 2016-04-21 11:09:55 +0800 | [diff] [blame] | 496 | if (fsopt->server_path) |
| 497 | dout("server path '%s'\n", fsopt->server_path); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 498 | |
Alex Elder | ee57741 | 2012-01-24 10:08:36 -0600 | [diff] [blame] | 499 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 500 | parse_fsopt_token, (void *)fsopt); |
Alex Elder | ee57741 | 2012-01-24 10:08:36 -0600 | [diff] [blame] | 501 | if (IS_ERR(*popt)) { |
| 502 | err = PTR_ERR(*popt); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 503 | goto out; |
Alex Elder | ee57741 | 2012-01-24 10:08:36 -0600 | [diff] [blame] | 504 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 505 | |
| 506 | /* success */ |
| 507 | *pfsopt = fsopt; |
| 508 | return 0; |
| 509 | |
| 510 | out: |
| 511 | destroy_mount_options(fsopt); |
| 512 | return err; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 513 | } |
| 514 | |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 515 | /** |
| 516 | * ceph_show_options - Show mount options in /proc/mounts |
| 517 | * @m: seq_file to write to |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 518 | * @root: root of that (sub)tree |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 519 | */ |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 520 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 521 | { |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 522 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 523 | struct ceph_mount_options *fsopt = fsc->mount_options; |
Ilya Dryomov | ff40f9a | 2015-03-25 21:02:16 +0300 | [diff] [blame] | 524 | size_t pos; |
| 525 | int ret; |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 526 | |
Ilya Dryomov | ff40f9a | 2015-03-25 21:02:16 +0300 | [diff] [blame] | 527 | /* a comma between MNT/MS and client options */ |
| 528 | seq_putc(m, ','); |
| 529 | pos = m->count; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 530 | |
Ilya Dryomov | ff40f9a | 2015-03-25 21:02:16 +0300 | [diff] [blame] | 531 | ret = ceph_print_client_options(m, fsc->client); |
| 532 | if (ret) |
| 533 | return ret; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 534 | |
Ilya Dryomov | ff40f9a | 2015-03-25 21:02:16 +0300 | [diff] [blame] | 535 | /* retract our comma if no client options */ |
| 536 | if (m->count == pos) |
| 537 | m->count--; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 538 | |
| 539 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) |
| 540 | seq_puts(m, ",dirstat"); |
Yan, Zheng | 133e915 | 2016-01-25 10:44:33 +0800 | [diff] [blame] | 541 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES)) |
| 542 | seq_puts(m, ",rbytes"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 543 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 544 | seq_puts(m, ",noasyncreaddir"); |
Ilya Dryomov | ff7eeb8 | 2015-03-25 21:10:09 +0300 | [diff] [blame] | 545 | if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0) |
Sage Weil | a40dc6c | 2012-01-10 09:12:55 -0800 | [diff] [blame] | 546 | seq_puts(m, ",nodcache"); |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 547 | if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) |
| 548 | seq_puts(m, ",fsc"); |
Yan, Zheng | 10183a6 | 2015-04-27 15:33:28 +0800 | [diff] [blame] | 549 | if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM) |
| 550 | seq_puts(m, ",nopoolperm"); |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 551 | |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 552 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
| 553 | if (fsopt->sb_flags & MS_POSIXACL) |
| 554 | seq_puts(m, ",acl"); |
| 555 | else |
| 556 | seq_puts(m, ",noacl"); |
| 557 | #endif |
| 558 | |
Yan, Zheng | 430afba | 2016-07-08 11:25:38 +0800 | [diff] [blame] | 559 | if (fsopt->mds_namespace) |
| 560 | seq_printf(m, ",mds_namespace=%s", fsopt->mds_namespace); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 561 | if (fsopt->wsize) |
| 562 | seq_printf(m, ",wsize=%d", fsopt->wsize); |
Sage Weil | 80456f8 | 2011-03-10 13:33:26 -0800 | [diff] [blame] | 563 | if (fsopt->rsize != CEPH_RSIZE_DEFAULT) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 564 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
Sage Weil | 83817e3 | 2011-08-04 08:03:44 -0700 | [diff] [blame] | 565 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
Sage Weil | 2151937 | 2011-12-01 08:06:52 -0800 | [diff] [blame] | 566 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 567 | if (fsopt->congestion_kb != default_congestion_kb()) |
| 568 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); |
| 569 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 570 | seq_printf(m, ",caps_wanted_delay_min=%d", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 571 | fsopt->caps_wanted_delay_min); |
| 572 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 573 | seq_printf(m, ",caps_wanted_delay_max=%d", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 574 | fsopt->caps_wanted_delay_max); |
| 575 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 576 | seq_printf(m, ",cap_release_safety=%d", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 577 | fsopt->cap_release_safety); |
| 578 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) |
| 579 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); |
| 580 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) |
| 581 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); |
| 582 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) |
Kees Cook | a068acf | 2015-09-04 15:44:57 -0700 | [diff] [blame] | 583 | seq_show_option(m, "snapdirname", fsopt->snapdir_name); |
Ilya Dryomov | ff40f9a | 2015-03-25 21:02:16 +0300 | [diff] [blame] | 584 | |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 585 | return 0; |
| 586 | } |
| 587 | |
| 588 | /* |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 589 | * handle any mon messages the standard library doesn't understand. |
| 590 | * return error if we don't either. |
| 591 | */ |
| 592 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
| 593 | { |
| 594 | struct ceph_fs_client *fsc = client->private; |
| 595 | int type = le16_to_cpu(msg->hdr.type); |
| 596 | |
| 597 | switch (type) { |
| 598 | case CEPH_MSG_MDS_MAP: |
Yan, Zheng | 430afba | 2016-07-08 11:25:38 +0800 | [diff] [blame] | 599 | ceph_mdsc_handle_mdsmap(fsc->mdsc, msg); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 600 | return 0; |
Yan, Zheng | 430afba | 2016-07-08 11:25:38 +0800 | [diff] [blame] | 601 | case CEPH_MSG_FS_MAP_USER: |
| 602 | ceph_mdsc_handle_fsmap(fsc->mdsc, msg); |
| 603 | return 0; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 604 | default: |
| 605 | return -1; |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | /* |
| 610 | * create a new fs client |
| 611 | */ |
H Hartley Sweeten | 0c6d4b4e2 | 2011-09-23 11:53:30 -0700 | [diff] [blame] | 612 | 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] | 613 | struct ceph_options *opt) |
| 614 | { |
| 615 | struct ceph_fs_client *fsc; |
Ilya Dryomov | 12b4629 | 2013-12-24 21:19:23 +0200 | [diff] [blame] | 616 | const u64 supported_features = |
Yan, Zheng | d463a43 | 2016-03-31 15:53:01 +0800 | [diff] [blame] | 617 | CEPH_FEATURE_FLOCK | CEPH_FEATURE_DIRLAYOUTHASH | |
| 618 | CEPH_FEATURE_MDSENC | CEPH_FEATURE_MDS_INLINE_DATA; |
Ilya Dryomov | 12b4629 | 2013-12-24 21:19:23 +0200 | [diff] [blame] | 619 | const u64 required_features = 0; |
Alex Elder | 3bf5333 | 2013-04-01 10:48:40 -0500 | [diff] [blame] | 620 | int page_count; |
| 621 | size_t size; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 622 | int err = -ENOMEM; |
| 623 | |
| 624 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
| 625 | if (!fsc) |
| 626 | return ERR_PTR(-ENOMEM); |
| 627 | |
Sage Weil | 6ab00d4 | 2011-08-09 09:41:59 -0700 | [diff] [blame] | 628 | fsc->client = ceph_create_client(opt, fsc, supported_features, |
| 629 | required_features); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 630 | if (IS_ERR(fsc->client)) { |
| 631 | err = PTR_ERR(fsc->client); |
| 632 | goto fail; |
| 633 | } |
| 634 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; |
Yan, Zheng | 430afba | 2016-07-08 11:25:38 +0800 | [diff] [blame] | 635 | |
| 636 | if (fsopt->mds_namespace == NULL) { |
| 637 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, |
| 638 | 0, true); |
| 639 | } else { |
| 640 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_FSMAP, |
| 641 | 0, false); |
| 642 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 643 | |
| 644 | fsc->mount_options = fsopt; |
| 645 | |
| 646 | fsc->sb = NULL; |
| 647 | fsc->mount_state = CEPH_MOUNT_MOUNTING; |
| 648 | |
| 649 | atomic_long_set(&fsc->writeback_count, 0); |
| 650 | |
| 651 | err = bdi_init(&fsc->backing_dev_info); |
| 652 | if (err < 0) |
| 653 | goto fail_client; |
| 654 | |
| 655 | err = -ENOMEM; |
Tejun Heo | 01e6acc | 2011-01-03 14:49:45 +0100 | [diff] [blame] | 656 | /* |
| 657 | * The number of concurrent works can be high but they don't need |
| 658 | * to be processed in parallel, limit concurrency. |
| 659 | */ |
| 660 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 661 | if (fsc->wb_wq == NULL) |
| 662 | goto fail_bdi; |
Tejun Heo | 01e6acc | 2011-01-03 14:49:45 +0100 | [diff] [blame] | 663 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 664 | if (fsc->pg_inv_wq == NULL) |
| 665 | goto fail_wb_wq; |
Tejun Heo | 01e6acc | 2011-01-03 14:49:45 +0100 | [diff] [blame] | 666 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 667 | if (fsc->trunc_wq == NULL) |
| 668 | goto fail_pg_inv_wq; |
| 669 | |
| 670 | /* set up mempools */ |
| 671 | err = -ENOMEM; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 672 | page_count = fsc->mount_options->wsize >> PAGE_SHIFT; |
Alex Elder | 3bf5333 | 2013-04-01 10:48:40 -0500 | [diff] [blame] | 673 | size = sizeof (struct page *) * (page_count ? page_count : 1); |
| 674 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 675 | if (!fsc->wb_pagevec_pool) |
| 676 | goto fail_trunc_wq; |
| 677 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 678 | /* setup fscache */ |
| 679 | if ((fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) && |
| 680 | (ceph_fscache_register_fs(fsc) != 0)) |
| 681 | goto fail_fscache; |
| 682 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 683 | /* caps */ |
| 684 | fsc->min_caps = fsopt->max_readdir; |
| 685 | |
| 686 | return fsc; |
| 687 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 688 | fail_fscache: |
| 689 | ceph_fscache_unregister_fs(fsc); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 690 | fail_trunc_wq: |
| 691 | destroy_workqueue(fsc->trunc_wq); |
| 692 | fail_pg_inv_wq: |
| 693 | destroy_workqueue(fsc->pg_inv_wq); |
| 694 | fail_wb_wq: |
| 695 | destroy_workqueue(fsc->wb_wq); |
| 696 | fail_bdi: |
| 697 | bdi_destroy(&fsc->backing_dev_info); |
| 698 | fail_client: |
| 699 | ceph_destroy_client(fsc->client); |
| 700 | fail: |
| 701 | kfree(fsc); |
| 702 | return ERR_PTR(err); |
| 703 | } |
| 704 | |
H Hartley Sweeten | 0c6d4b4e2 | 2011-09-23 11:53:30 -0700 | [diff] [blame] | 705 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 706 | { |
| 707 | dout("destroy_fs_client %p\n", fsc); |
| 708 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 709 | ceph_fscache_unregister_fs(fsc); |
| 710 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 711 | destroy_workqueue(fsc->wb_wq); |
| 712 | destroy_workqueue(fsc->pg_inv_wq); |
| 713 | destroy_workqueue(fsc->trunc_wq); |
| 714 | |
| 715 | bdi_destroy(&fsc->backing_dev_info); |
| 716 | |
| 717 | mempool_destroy(fsc->wb_pagevec_pool); |
| 718 | |
| 719 | destroy_mount_options(fsc->mount_options); |
| 720 | |
| 721 | ceph_fs_debugfs_cleanup(fsc); |
| 722 | |
| 723 | ceph_destroy_client(fsc->client); |
| 724 | |
| 725 | kfree(fsc); |
| 726 | dout("destroy_fs_client %p done\n", fsc); |
| 727 | } |
| 728 | |
| 729 | /* |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 730 | * caches |
| 731 | */ |
| 732 | struct kmem_cache *ceph_inode_cachep; |
| 733 | struct kmem_cache *ceph_cap_cachep; |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 734 | struct kmem_cache *ceph_cap_flush_cachep; |
Sage Weil | 6e19a16 | 2010-04-29 16:38:32 -0700 | [diff] [blame] | 735 | struct kmem_cache *ceph_dentry_cachep; |
| 736 | struct kmem_cache *ceph_file_cachep; |
| 737 | |
| 738 | static void ceph_inode_init_once(void *foo) |
| 739 | { |
| 740 | struct ceph_inode_info *ci = foo; |
| 741 | inode_init_once(&ci->vfs_inode); |
| 742 | } |
| 743 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 744 | static int __init init_caches(void) |
| 745 | { |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 746 | int error = -ENOMEM; |
| 747 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 748 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", |
| 749 | sizeof(struct ceph_inode_info), |
| 750 | __alignof__(struct ceph_inode_info), |
Vladimir Davydov | 5d09705 | 2016-01-14 15:18:21 -0800 | [diff] [blame] | 751 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| |
| 752 | SLAB_ACCOUNT, ceph_inode_init_once); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 753 | if (ceph_inode_cachep == NULL) |
| 754 | return -ENOMEM; |
| 755 | |
| 756 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, |
| 757 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); |
| 758 | if (ceph_cap_cachep == NULL) |
| 759 | goto bad_cap; |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 760 | ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush, |
| 761 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); |
| 762 | if (ceph_cap_flush_cachep == NULL) |
| 763 | goto bad_cap_flush; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 764 | |
| 765 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, |
| 766 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); |
| 767 | if (ceph_dentry_cachep == NULL) |
| 768 | goto bad_dentry; |
| 769 | |
Nikolay Borisov | 6b1a9a6 | 2016-07-25 20:12:13 +0300 | [diff] [blame] | 770 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, SLAB_MEM_SPREAD); |
| 771 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 772 | if (ceph_file_cachep == NULL) |
| 773 | goto bad_file; |
| 774 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 775 | if ((error = ceph_fscache_register())) |
| 776 | goto bad_file; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 777 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 778 | return 0; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 779 | bad_file: |
| 780 | kmem_cache_destroy(ceph_dentry_cachep); |
| 781 | bad_dentry: |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 782 | kmem_cache_destroy(ceph_cap_flush_cachep); |
| 783 | bad_cap_flush: |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 784 | kmem_cache_destroy(ceph_cap_cachep); |
| 785 | bad_cap: |
| 786 | kmem_cache_destroy(ceph_inode_cachep); |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 787 | return error; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 788 | } |
| 789 | |
| 790 | static void destroy_caches(void) |
| 791 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 792 | /* |
| 793 | * Make sure all delayed rcu free inodes are flushed before we |
| 794 | * destroy cache. |
| 795 | */ |
| 796 | rcu_barrier(); |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 797 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 798 | kmem_cache_destroy(ceph_inode_cachep); |
| 799 | kmem_cache_destroy(ceph_cap_cachep); |
Yan, Zheng | f66fd9f | 2015-06-10 17:26:13 +0800 | [diff] [blame] | 800 | kmem_cache_destroy(ceph_cap_flush_cachep); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 801 | kmem_cache_destroy(ceph_dentry_cachep); |
| 802 | kmem_cache_destroy(ceph_file_cachep); |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 803 | |
| 804 | ceph_fscache_unregister(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 805 | } |
| 806 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 807 | /* |
| 808 | * ceph_umount_begin - initiate forced umount. Tear down down the |
| 809 | * mount, skipping steps that may hang while waiting for server(s). |
| 810 | */ |
| 811 | static void ceph_umount_begin(struct super_block *sb) |
| 812 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 813 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 814 | |
| 815 | dout("ceph_umount_begin - starting forced umount\n"); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 816 | if (!fsc) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 817 | return; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 818 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; |
Yan, Zheng | 48fec5d | 2015-07-01 16:27:46 +0800 | [diff] [blame] | 819 | ceph_mdsc_force_umount(fsc->mdsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 820 | return; |
| 821 | } |
| 822 | |
Jeff Layton | 304902e | 2019-05-07 09:20:54 -0400 | [diff] [blame] | 823 | static int ceph_remount(struct super_block *sb, int *flags, char *data) |
| 824 | { |
| 825 | sync_filesystem(sb); |
| 826 | return 0; |
| 827 | } |
| 828 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 829 | static const struct super_operations ceph_super_ops = { |
| 830 | .alloc_inode = ceph_alloc_inode, |
| 831 | .destroy_inode = ceph_destroy_inode, |
| 832 | .write_inode = ceph_write_inode, |
Yan, Zheng | 9f12bd1 | 2013-09-20 19:55:31 +0800 | [diff] [blame] | 833 | .drop_inode = ceph_drop_inode, |
Yan, Zheng | 9a5530c | 2016-06-15 16:29:18 +0800 | [diff] [blame] | 834 | .evict_inode = ceph_evict_inode, |
Sage Weil | 2d9c98a | 2010-07-30 09:38:13 -0700 | [diff] [blame] | 835 | .sync_fs = ceph_sync_fs, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 836 | .put_super = ceph_put_super, |
Jeff Layton | 304902e | 2019-05-07 09:20:54 -0400 | [diff] [blame] | 837 | .remount_fs = ceph_remount, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 838 | .show_options = ceph_show_options, |
| 839 | .statfs = ceph_statfs, |
| 840 | .umount_begin = ceph_umount_begin, |
| 841 | }; |
| 842 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 843 | /* |
| 844 | * Bootstrap mount by opening the root directory. Note the mount |
| 845 | * @started time from caller, and time out if this takes too long. |
| 846 | */ |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 847 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 848 | const char *path, |
| 849 | unsigned long started) |
| 850 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 851 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 852 | struct ceph_mds_request *req = NULL; |
| 853 | int err; |
| 854 | struct dentry *root; |
| 855 | |
| 856 | /* open dir */ |
| 857 | dout("open_root_inode opening '%s'\n", path); |
| 858 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); |
| 859 | if (IS_ERR(req)) |
Julia Lawall | 7e34bc5 | 2010-05-22 12:01:14 +0200 | [diff] [blame] | 860 | return ERR_CAST(req); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 861 | req->r_path1 = kstrdup(path, GFP_NOFS); |
Sanidhya Kashyap | a149bb9 | 2015-03-21 12:54:58 -0400 | [diff] [blame] | 862 | if (!req->r_path1) { |
| 863 | root = ERR_PTR(-ENOMEM); |
| 864 | goto out; |
| 865 | } |
| 866 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 867 | req->r_ino1.ino = CEPH_INO_ROOT; |
| 868 | req->r_ino1.snap = CEPH_NOSNAP; |
| 869 | req->r_started = started; |
Ilya Dryomov | a319bf5 | 2015-05-15 12:02:17 +0300 | [diff] [blame] | 870 | req->r_timeout = fsc->client->options->mount_timeout; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 871 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
| 872 | req->r_num_caps = 2; |
| 873 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
| 874 | if (err == 0) { |
Al Viro | 3c5184e | 2012-01-09 16:34:32 -0500 | [diff] [blame] | 875 | struct inode *inode = req->r_target_inode; |
| 876 | req->r_target_inode = NULL; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 877 | dout("open_root_inode success\n"); |
Yan, Zheng | ce2728a | 2016-09-14 14:53:05 +0800 | [diff] [blame] | 878 | root = d_make_root(inode); |
| 879 | if (!root) { |
| 880 | root = ERR_PTR(-ENOMEM); |
| 881 | goto out; |
Sage Weil | 774ac21 | 2011-11-11 09:48:08 -0800 | [diff] [blame] | 882 | } |
Linus Torvalds | 1a52bb0 | 2012-01-13 10:29:21 -0800 | [diff] [blame] | 883 | ceph_init_dentry(root); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 884 | dout("open_root_inode success, root dentry is %p\n", root); |
| 885 | } else { |
| 886 | root = ERR_PTR(err); |
| 887 | } |
Al Viro | 3c5184e | 2012-01-09 16:34:32 -0500 | [diff] [blame] | 888 | out: |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 889 | ceph_mdsc_put_request(req); |
| 890 | return root; |
| 891 | } |
| 892 | |
| 893 | /* |
| 894 | * mount: join the ceph cluster, and open root directory. |
| 895 | */ |
Yan, Zheng | 3f38495 | 2016-04-21 11:09:55 +0800 | [diff] [blame] | 896 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 897 | { |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 898 | int err; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 899 | unsigned long started = jiffies; /* note the start time */ |
| 900 | struct dentry *root; |
| 901 | |
Yan, Zheng | 132ca7e | 2016-03-12 13:20:48 +0800 | [diff] [blame] | 902 | dout("mount start %p\n", fsc); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 903 | mutex_lock(&fsc->client->mount_mutex); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 904 | |
Yan, Zheng | 132ca7e | 2016-03-12 13:20:48 +0800 | [diff] [blame] | 905 | if (!fsc->sb->s_root) { |
Xiubo Li | 68d8766 | 2019-12-20 09:34:04 -0500 | [diff] [blame^] | 906 | const char *path, *p; |
Yan, Zheng | 132ca7e | 2016-03-12 13:20:48 +0800 | [diff] [blame] | 907 | err = __ceph_open_session(fsc->client, started); |
| 908 | if (err < 0) |
| 909 | goto out; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 910 | |
Xiubo Li | 68d8766 | 2019-12-20 09:34:04 -0500 | [diff] [blame^] | 911 | p = path_remove_extra_slash(fsc->mount_options->server_path); |
| 912 | if (IS_ERR(p)) { |
| 913 | err = PTR_ERR(p); |
| 914 | goto out; |
Yan, Zheng | ce2728a | 2016-09-14 14:53:05 +0800 | [diff] [blame] | 915 | } |
Xiubo Li | 68d8766 | 2019-12-20 09:34:04 -0500 | [diff] [blame^] | 916 | /* if the server path is omitted or just consists of '/' */ |
| 917 | if (!p) |
| 918 | path = ""; |
| 919 | else |
| 920 | path = p; |
| 921 | dout("mount opening path '%s'\n", path); |
Chengguang Xu | 087d268 | 2018-02-09 20:40:59 +0800 | [diff] [blame] | 922 | |
| 923 | err = ceph_fs_debugfs_init(fsc); |
| 924 | if (err < 0) |
| 925 | goto out; |
| 926 | |
Yan, Zheng | ce2728a | 2016-09-14 14:53:05 +0800 | [diff] [blame] | 927 | root = open_root_dentry(fsc, path, started); |
Xiubo Li | 68d8766 | 2019-12-20 09:34:04 -0500 | [diff] [blame^] | 928 | kfree(p); |
Yan, Zheng | 132ca7e | 2016-03-12 13:20:48 +0800 | [diff] [blame] | 929 | if (IS_ERR(root)) { |
| 930 | err = PTR_ERR(root); |
| 931 | goto out; |
| 932 | } |
Yan, Zheng | ce2728a | 2016-09-14 14:53:05 +0800 | [diff] [blame] | 933 | fsc->sb->s_root = dget(root); |
Geert Uytterhoeven | 31ca587 | 2016-10-13 17:15:37 +0200 | [diff] [blame] | 934 | } else { |
| 935 | root = dget(fsc->sb->s_root); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 936 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 937 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 938 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 939 | dout("mount success\n"); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 940 | mutex_unlock(&fsc->client->mount_mutex); |
| 941 | return root; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 942 | |
Yan, Zheng | 132ca7e | 2016-03-12 13:20:48 +0800 | [diff] [blame] | 943 | out: |
| 944 | mutex_unlock(&fsc->client->mount_mutex); |
| 945 | return ERR_PTR(err); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 946 | } |
| 947 | |
| 948 | static int ceph_set_super(struct super_block *s, void *data) |
| 949 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 950 | struct ceph_fs_client *fsc = data; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 951 | int ret; |
| 952 | |
| 953 | dout("set_super %p data %p\n", s, data); |
| 954 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 955 | s->s_flags = fsc->mount_options->sb_flags; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 956 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
| 957 | |
Guangliang Zhao | 7221fe4 | 2013-11-11 15:18:03 +0800 | [diff] [blame] | 958 | s->s_xattr = ceph_xattr_handlers; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 959 | s->s_fs_info = fsc; |
| 960 | fsc->sb = s; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 961 | |
| 962 | s->s_op = &ceph_super_ops; |
| 963 | s->s_export_op = &ceph_export_ops; |
| 964 | |
| 965 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ |
| 966 | |
| 967 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ |
| 968 | if (ret != 0) |
| 969 | goto fail; |
| 970 | |
| 971 | return ret; |
| 972 | |
| 973 | fail: |
| 974 | s->s_fs_info = NULL; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 975 | fsc->sb = NULL; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 976 | return ret; |
| 977 | } |
| 978 | |
| 979 | /* |
| 980 | * share superblock if same fs AND options |
| 981 | */ |
| 982 | static int ceph_compare_super(struct super_block *sb, void *data) |
| 983 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 984 | struct ceph_fs_client *new = data; |
| 985 | struct ceph_mount_options *fsopt = new->mount_options; |
| 986 | struct ceph_options *opt = new->client->options; |
| 987 | struct ceph_fs_client *other = ceph_sb_to_client(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 988 | |
| 989 | dout("ceph_compare_super %p\n", sb); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 990 | |
| 991 | if (compare_mount_options(fsopt, opt, other)) { |
| 992 | dout("monitor(s)/mount options don't match\n"); |
| 993 | return 0; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 994 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 995 | if ((opt->flags & CEPH_OPT_FSID) && |
| 996 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { |
| 997 | dout("fsid doesn't match\n"); |
| 998 | return 0; |
| 999 | } |
| 1000 | if (fsopt->sb_flags != other->mount_options->sb_flags) { |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1001 | dout("flags differ\n"); |
| 1002 | return 0; |
| 1003 | } |
| 1004 | return 1; |
| 1005 | } |
| 1006 | |
| 1007 | /* |
| 1008 | * construct our own bdi so we can control readahead, etc. |
| 1009 | */ |
Jeff Mahoney | 00d5643 | 2010-06-10 11:13:58 -0400 | [diff] [blame] | 1010 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
Sage Weil | 31e0cf8 | 2010-05-04 16:39:35 -0700 | [diff] [blame] | 1011 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1012 | static int ceph_register_bdi(struct super_block *sb, |
| 1013 | struct ceph_fs_client *fsc) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1014 | { |
| 1015 | int err; |
| 1016 | |
Sage Weil | 83817e3 | 2011-08-04 08:03:44 -0700 | [diff] [blame] | 1017 | /* set ra_pages based on rasize mount option? */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1018 | if (fsc->mount_options->rasize >= PAGE_SIZE) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1019 | fsc->backing_dev_info.ra_pages = |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1020 | (fsc->mount_options->rasize + PAGE_SIZE - 1) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1021 | >> PAGE_SHIFT; |
Yehuda Sadeh | e985222 | 2011-07-22 11:12:28 -0700 | [diff] [blame] | 1022 | else |
| 1023 | fsc->backing_dev_info.ra_pages = |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1024 | VM_MAX_READAHEAD * 1024 / PAGE_SIZE; |
Yehuda Sadeh | e985222 | 2011-07-22 11:12:28 -0700 | [diff] [blame] | 1025 | |
Joe Perches | d2cc4dd | 2012-11-29 08:37:03 -0600 | [diff] [blame] | 1026 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld", |
Sage Weil | 31e0cf8 | 2010-05-04 16:39:35 -0700 | [diff] [blame] | 1027 | atomic_long_inc_return(&bdi_seq)); |
Sage Weil | 5dfc589 | 2010-05-04 16:14:46 -0700 | [diff] [blame] | 1028 | if (!err) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1029 | sb->s_bdi = &fsc->backing_dev_info; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1030 | return err; |
| 1031 | } |
| 1032 | |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1033 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
| 1034 | int flags, const char *dev_name, void *data) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1035 | { |
| 1036 | struct super_block *sb; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1037 | struct ceph_fs_client *fsc; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1038 | struct dentry *res; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1039 | int err; |
| 1040 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1041 | struct ceph_mount_options *fsopt = NULL; |
| 1042 | struct ceph_options *opt = NULL; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1043 | |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1044 | dout("ceph_mount\n"); |
Sage Weil | 45195e4 | 2014-02-16 10:05:29 -0800 | [diff] [blame] | 1045 | |
| 1046 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
| 1047 | flags |= MS_POSIXACL; |
| 1048 | #endif |
Yan, Zheng | 3f38495 | 2016-04-21 11:09:55 +0800 | [diff] [blame] | 1049 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1050 | if (err < 0) { |
| 1051 | res = ERR_PTR(err); |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 1052 | goto out_final; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1053 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1054 | |
| 1055 | /* create client (which we may/may not use) */ |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1056 | fsc = create_fs_client(fsopt, opt); |
| 1057 | if (IS_ERR(fsc)) { |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1058 | res = ERR_CAST(fsc); |
Noah Watkins | 259a187 | 2011-08-22 13:49:41 -0600 | [diff] [blame] | 1059 | destroy_mount_options(fsopt); |
| 1060 | ceph_destroy_options(opt); |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 1061 | goto out_final; |
| 1062 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1063 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1064 | err = ceph_mdsc_init(fsc); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1065 | if (err < 0) { |
| 1066 | res = ERR_PTR(err); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1067 | goto out; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1068 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1069 | |
| 1070 | if (ceph_test_opt(fsc->client, NOSHARE)) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1071 | compare_super = NULL; |
David Howells | 9249e17 | 2012-06-25 12:55:37 +0100 | [diff] [blame] | 1072 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1073 | if (IS_ERR(sb)) { |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1074 | res = ERR_CAST(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1075 | goto out; |
| 1076 | } |
| 1077 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1078 | if (ceph_sb_to_client(sb) != fsc) { |
| 1079 | ceph_mdsc_destroy(fsc); |
| 1080 | destroy_fs_client(fsc); |
| 1081 | fsc = ceph_sb_to_client(sb); |
| 1082 | dout("get_sb got existing client %p\n", fsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1083 | } else { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1084 | dout("get_sb using new client %p\n", fsc); |
| 1085 | err = ceph_register_bdi(sb, fsc); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1086 | if (err < 0) { |
| 1087 | res = ERR_PTR(err); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1088 | goto out_splat; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1089 | } |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1090 | } |
| 1091 | |
Yan, Zheng | 3f38495 | 2016-04-21 11:09:55 +0800 | [diff] [blame] | 1092 | res = ceph_real_mount(fsc); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1093 | if (IS_ERR(res)) |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1094 | goto out_splat; |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1095 | dout("root %p inode %p ino %llx.%llx\n", res, |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1096 | d_inode(res), ceph_vinop(d_inode(res))); |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1097 | return res; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1098 | |
| 1099 | out_splat: |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1100 | ceph_mdsc_close_sessions(fsc->mdsc); |
Al Viro | 3981f2e | 2010-03-21 19:22:29 -0400 | [diff] [blame] | 1101 | deactivate_locked_super(sb); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1102 | goto out_final; |
| 1103 | |
| 1104 | out: |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1105 | ceph_mdsc_destroy(fsc); |
| 1106 | destroy_fs_client(fsc); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1107 | out_final: |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1108 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
| 1109 | return res; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1110 | } |
| 1111 | |
| 1112 | static void ceph_kill_sb(struct super_block *s) |
| 1113 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1114 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
Christoph Hellwig | e4d2750 | 2015-01-14 10:42:38 +0100 | [diff] [blame] | 1115 | dev_t dev = s->s_dev; |
| 1116 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1117 | dout("kill_sb %p\n", s); |
Christoph Hellwig | e4d2750 | 2015-01-14 10:42:38 +0100 | [diff] [blame] | 1118 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1119 | ceph_mdsc_pre_umount(fsc->mdsc); |
Christoph Hellwig | e4d2750 | 2015-01-14 10:42:38 +0100 | [diff] [blame] | 1120 | generic_shutdown_super(s); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1121 | ceph_mdsc_destroy(fsc); |
Christoph Hellwig | e4d2750 | 2015-01-14 10:42:38 +0100 | [diff] [blame] | 1122 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1123 | destroy_fs_client(fsc); |
Christoph Hellwig | e4d2750 | 2015-01-14 10:42:38 +0100 | [diff] [blame] | 1124 | free_anon_bdev(dev); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1125 | } |
| 1126 | |
| 1127 | static struct file_system_type ceph_fs_type = { |
| 1128 | .owner = THIS_MODULE, |
| 1129 | .name = "ceph", |
Al Viro | a7f9fb2 | 2010-07-26 16:17:55 +0400 | [diff] [blame] | 1130 | .mount = ceph_mount, |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1131 | .kill_sb = ceph_kill_sb, |
| 1132 | .fs_flags = FS_RENAME_DOES_D_MOVE, |
| 1133 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 1134 | MODULE_ALIAS_FS("ceph"); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1135 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1136 | static int __init init_ceph(void) |
| 1137 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1138 | int ret = init_caches(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1139 | if (ret) |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1140 | goto out; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1141 | |
Yan, Zheng | eb13e83 | 2014-03-09 23:16:40 +0800 | [diff] [blame] | 1142 | ceph_flock_init(); |
Alex Elder | 3ce6cd1 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 1143 | ceph_xattr_init(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1144 | ret = register_filesystem(&ceph_fs_type); |
| 1145 | if (ret) |
Ilya Dryomov | 34b759b | 2016-02-16 15:00:24 +0100 | [diff] [blame] | 1146 | goto out_xattr; |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1147 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1148 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
| 1149 | |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1150 | return 0; |
| 1151 | |
Yan, Zheng | 97c85a8 | 2014-11-06 15:09:41 +0800 | [diff] [blame] | 1152 | out_xattr: |
Alex Elder | 3ce6cd1 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 1153 | ceph_xattr_exit(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1154 | destroy_caches(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1155 | out: |
| 1156 | return ret; |
| 1157 | } |
| 1158 | |
| 1159 | static void __exit exit_ceph(void) |
| 1160 | { |
| 1161 | dout("exit_ceph\n"); |
| 1162 | unregister_filesystem(&ceph_fs_type); |
Alex Elder | 3ce6cd1 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 1163 | ceph_xattr_exit(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1164 | destroy_caches(); |
Sage Weil | 16725b9 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1165 | } |
| 1166 | |
| 1167 | module_init(init_ceph); |
| 1168 | module_exit(exit_ceph); |
| 1169 | |
| 1170 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); |
| 1171 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); |
| 1172 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); |
| 1173 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); |
| 1174 | MODULE_LICENSE("GPL"); |