Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1 | #include <linux/ceph/ceph_debug.h> |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 2 | |
| 3 | #include <linux/spinlock.h> |
| 4 | #include <linux/fs_struct.h> |
| 5 | #include <linux/namei.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 6 | #include <linux/slab.h> |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 7 | #include <linux/sched.h> |
| 8 | |
| 9 | #include "super.h" |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 10 | #include "mds_client.h" |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 11 | |
| 12 | /* |
| 13 | * Directory operations: readdir, lookup, create, link, unlink, |
| 14 | * rename, etc. |
| 15 | */ |
| 16 | |
| 17 | /* |
| 18 | * Ceph MDS operations are specified in terms of a base ino and |
| 19 | * relative path. Thus, the client can specify an operation on a |
| 20 | * specific inode (e.g., a getattr due to fstat(2)), or as a path |
| 21 | * relative to, say, the root directory. |
| 22 | * |
| 23 | * Normally, we limit ourselves to strict inode ops (no path component) |
| 24 | * or dentry operations (a single path component relative to an ino). The |
| 25 | * exception to this is open_root_dentry(), which will open the mount |
| 26 | * point by name. |
| 27 | */ |
| 28 | |
Sage Weil | 52dfb8a | 2010-08-03 10:25:30 -0700 | [diff] [blame] | 29 | const struct dentry_operations ceph_dentry_ops; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 30 | |
| 31 | /* |
| 32 | * Initialize ceph dentry state. |
| 33 | */ |
| 34 | int ceph_init_dentry(struct dentry *dentry) |
| 35 | { |
| 36 | struct ceph_dentry_info *di; |
| 37 | |
| 38 | if (dentry->d_fsdata) |
| 39 | return 0; |
| 40 | |
Geliang Tang | 99ec269 | 2016-03-13 15:26:29 +0800 | [diff] [blame] | 41 | di = kmem_cache_zalloc(ceph_dentry_cachep, GFP_KERNEL); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 42 | if (!di) |
| 43 | return -ENOMEM; /* oh well */ |
| 44 | |
| 45 | spin_lock(&dentry->d_lock); |
Sage Weil | 8c6efb5 | 2010-04-23 11:36:54 -0700 | [diff] [blame] | 46 | if (dentry->d_fsdata) { |
| 47 | /* lost a race */ |
| 48 | kmem_cache_free(ceph_dentry_cachep, di); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 49 | goto out_unlock; |
Sage Weil | 8c6efb5 | 2010-04-23 11:36:54 -0700 | [diff] [blame] | 50 | } |
Sage Weil | 48d0cbd | 2011-07-26 11:30:15 -0700 | [diff] [blame] | 51 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 52 | if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_NOSNAP) |
Sage Weil | 48d0cbd | 2011-07-26 11:30:15 -0700 | [diff] [blame] | 53 | d_set_d_op(dentry, &ceph_dentry_ops); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 54 | else if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_SNAPDIR) |
Sage Weil | 48d0cbd | 2011-07-26 11:30:15 -0700 | [diff] [blame] | 55 | d_set_d_op(dentry, &ceph_snapdir_dentry_ops); |
| 56 | else |
| 57 | d_set_d_op(dentry, &ceph_snap_dentry_ops); |
| 58 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 59 | di->dentry = dentry; |
| 60 | di->lease_session = NULL; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 61 | dentry->d_time = jiffies; |
Sage Weil | 48d0cbd | 2011-07-26 11:30:15 -0700 | [diff] [blame] | 62 | /* avoid reordering d_fsdata setup so that the check above is safe */ |
| 63 | smp_mb(); |
| 64 | dentry->d_fsdata = di; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 65 | ceph_dentry_lru_add(dentry); |
| 66 | out_unlock: |
| 67 | spin_unlock(&dentry->d_lock); |
| 68 | return 0; |
| 69 | } |
| 70 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 71 | /* |
| 72 | * for readdir, we encode the directory frag and offset within that |
| 73 | * frag into f_pos. |
| 74 | */ |
| 75 | static unsigned fpos_frag(loff_t p) |
| 76 | { |
| 77 | return p >> 32; |
| 78 | } |
| 79 | static unsigned fpos_off(loff_t p) |
| 80 | { |
| 81 | return p & 0xffffffff; |
| 82 | } |
| 83 | |
Yan, Zheng | 4d5f5df | 2014-02-13 19:40:26 +0800 | [diff] [blame] | 84 | static int fpos_cmp(loff_t l, loff_t r) |
| 85 | { |
| 86 | int v = ceph_frag_compare(fpos_frag(l), fpos_frag(r)); |
| 87 | if (v) |
| 88 | return v; |
| 89 | return (int)(fpos_off(l) - fpos_off(r)); |
| 90 | } |
| 91 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 92 | /* |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 93 | * make note of the last dentry we read, so we can |
| 94 | * continue at the same lexicographical point, |
| 95 | * regardless of what dir changes take place on the |
| 96 | * server. |
| 97 | */ |
| 98 | static int note_last_dentry(struct ceph_file_info *fi, const char *name, |
| 99 | int len, unsigned next_offset) |
| 100 | { |
| 101 | char *buf = kmalloc(len+1, GFP_KERNEL); |
| 102 | if (!buf) |
| 103 | return -ENOMEM; |
| 104 | kfree(fi->last_name); |
| 105 | fi->last_name = buf; |
| 106 | memcpy(fi->last_name, name, len); |
| 107 | fi->last_name[len] = 0; |
| 108 | fi->next_offset = next_offset; |
| 109 | dout("note_last_dentry '%s'\n", fi->last_name); |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | /* |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 114 | * When possible, we try to satisfy a readdir by peeking at the |
| 115 | * dcache. We make this work by carefully ordering dentries on |
Al Viro | 946e51f | 2014-10-26 19:19:16 -0400 | [diff] [blame] | 116 | * d_child when we initially get results back from the MDS, and |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 117 | * falling back to a "normal" sync readdir if any dentries in the dir |
| 118 | * are dropped. |
| 119 | * |
Yan, Zheng | 2f276c5 | 2013-03-13 19:44:32 +0800 | [diff] [blame] | 120 | * Complete dir indicates that we have all dentries in the dir. It is |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 121 | * defined IFF we hold CEPH_CAP_FILE_SHARED (which will be revoked by |
| 122 | * the MDS if/when the directory is modified). |
| 123 | */ |
Yan, Zheng | a30be7c | 2014-04-06 14:10:04 +0800 | [diff] [blame] | 124 | static int __dcache_readdir(struct file *file, struct dir_context *ctx, |
| 125 | u32 shared_gen) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 126 | { |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 127 | struct ceph_file_info *fi = file->private_data; |
Al Viro | b583043 | 2014-10-31 01:22:04 -0400 | [diff] [blame] | 128 | struct dentry *parent = file->f_path.dentry; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 129 | struct inode *dir = d_inode(parent); |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 130 | struct dentry *dentry, *last = NULL; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 131 | struct ceph_dentry_info *di; |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 132 | unsigned nsize = PAGE_CACHE_SIZE / sizeof(struct dentry *); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 133 | int err = 0; |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 134 | loff_t ptr_pos = 0; |
| 135 | struct ceph_readdir_cache_control cache_ctl = {}; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 136 | |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 137 | dout("__dcache_readdir %p v%u at %llu\n", dir, shared_gen, ctx->pos); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 138 | |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 139 | /* we can calculate cache index for the first dirfrag */ |
| 140 | if (ceph_frag_is_leftmost(fpos_frag(ctx->pos))) { |
| 141 | cache_ctl.index = fpos_off(ctx->pos) - 2; |
| 142 | BUG_ON(cache_ctl.index < 0); |
| 143 | ptr_pos = cache_ctl.index * sizeof(struct dentry *); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 144 | } |
| 145 | |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 146 | while (true) { |
| 147 | pgoff_t pgoff; |
| 148 | bool emit_dentry; |
| 149 | |
| 150 | if (ptr_pos >= i_size_read(dir)) { |
Sage Weil | 9cfa109 | 2011-07-26 11:26:18 -0700 | [diff] [blame] | 151 | fi->flags |= CEPH_F_ATEND; |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 152 | err = 0; |
| 153 | break; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 154 | } |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 155 | |
| 156 | err = -EAGAIN; |
| 157 | pgoff = ptr_pos >> PAGE_CACHE_SHIFT; |
| 158 | if (!cache_ctl.page || pgoff != page_index(cache_ctl.page)) { |
| 159 | ceph_readdir_cache_release(&cache_ctl); |
| 160 | cache_ctl.page = find_lock_page(&dir->i_data, pgoff); |
| 161 | if (!cache_ctl.page) { |
| 162 | dout(" page %lu not found\n", pgoff); |
| 163 | break; |
| 164 | } |
| 165 | /* reading/filling the cache are serialized by |
| 166 | * i_mutex, no need to use page lock */ |
| 167 | unlock_page(cache_ctl.page); |
| 168 | cache_ctl.dentries = kmap(cache_ctl.page); |
| 169 | } |
| 170 | |
| 171 | rcu_read_lock(); |
| 172 | spin_lock(&parent->d_lock); |
| 173 | /* check i_size again here, because empty directory can be |
| 174 | * marked as complete while not holding the i_mutex. */ |
| 175 | if (ceph_dir_is_complete_ordered(dir) && |
| 176 | ptr_pos < i_size_read(dir)) |
| 177 | dentry = cache_ctl.dentries[cache_ctl.index % nsize]; |
| 178 | else |
| 179 | dentry = NULL; |
| 180 | spin_unlock(&parent->d_lock); |
| 181 | if (dentry && !lockref_get_not_dead(&dentry->d_lockref)) |
| 182 | dentry = NULL; |
| 183 | rcu_read_unlock(); |
| 184 | if (!dentry) |
| 185 | break; |
| 186 | |
| 187 | emit_dentry = false; |
| 188 | di = ceph_dentry(dentry); |
| 189 | spin_lock(&dentry->d_lock); |
Yan, Zheng | a30be7c | 2014-04-06 14:10:04 +0800 | [diff] [blame] | 190 | if (di->lease_shared_gen == shared_gen && |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 191 | d_really_is_positive(dentry) && |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 192 | ceph_snap(d_inode(dentry)) != CEPH_SNAPDIR && |
| 193 | ceph_ino(d_inode(dentry)) != CEPH_INO_CEPH && |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 194 | fpos_cmp(ctx->pos, di->offset) <= 0) { |
| 195 | emit_dentry = true; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 196 | } |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 197 | spin_unlock(&dentry->d_lock); |
| 198 | |
| 199 | if (emit_dentry) { |
| 200 | dout(" %llu (%llu) dentry %p %pd %p\n", di->offset, ctx->pos, |
| 201 | dentry, dentry, d_inode(dentry)); |
| 202 | ctx->pos = di->offset; |
| 203 | if (!dir_emit(ctx, dentry->d_name.name, |
| 204 | dentry->d_name.len, |
| 205 | ceph_translate_ino(dentry->d_sb, |
| 206 | d_inode(dentry)->i_ino), |
| 207 | d_inode(dentry)->i_mode >> 12)) { |
| 208 | dput(dentry); |
| 209 | err = 0; |
| 210 | break; |
| 211 | } |
| 212 | ctx->pos++; |
| 213 | |
| 214 | if (last) |
| 215 | dput(last); |
| 216 | last = dentry; |
| 217 | } else { |
| 218 | dput(dentry); |
| 219 | } |
| 220 | |
| 221 | cache_ctl.index++; |
| 222 | ptr_pos += sizeof(struct dentry *); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 223 | } |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 224 | ceph_readdir_cache_release(&cache_ctl); |
| 225 | if (last) { |
| 226 | int ret; |
| 227 | di = ceph_dentry(last); |
| 228 | ret = note_last_dentry(fi, last->d_name.name, last->d_name.len, |
| 229 | fpos_off(di->offset) + 1); |
| 230 | if (ret < 0) |
| 231 | err = ret; |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 232 | dput(last); |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 233 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 234 | return err; |
| 235 | } |
| 236 | |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 237 | static int ceph_readdir(struct file *file, struct dir_context *ctx) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 238 | { |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 239 | struct ceph_file_info *fi = file->private_data; |
| 240 | struct inode *inode = file_inode(file); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 241 | struct ceph_inode_info *ci = ceph_inode(inode); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 242 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
| 243 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 244 | unsigned frag = fpos_frag(ctx->pos); |
| 245 | int off = fpos_off(ctx->pos); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 246 | int err; |
| 247 | u32 ftype; |
| 248 | struct ceph_mds_reply_info_parsed *rinfo; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 249 | |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 250 | dout("readdir %p file %p frag %u off %u\n", inode, file, frag, off); |
Sage Weil | 9cfa109 | 2011-07-26 11:26:18 -0700 | [diff] [blame] | 251 | if (fi->flags & CEPH_F_ATEND) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 252 | return 0; |
| 253 | |
| 254 | /* always start with . and .. */ |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 255 | if (ctx->pos == 0) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 256 | dout("readdir off 0 -> '.'\n"); |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 257 | if (!dir_emit(ctx, ".", 1, |
Yehuda Sadeh | ad1fee9 | 2011-01-21 16:44:03 -0800 | [diff] [blame] | 258 | ceph_translate_ino(inode->i_sb, inode->i_ino), |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 259 | inode->i_mode >> 12)) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 260 | return 0; |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 261 | ctx->pos = 1; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 262 | off = 1; |
| 263 | } |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 264 | if (ctx->pos == 1) { |
Al Viro | b583043 | 2014-10-31 01:22:04 -0400 | [diff] [blame] | 265 | ino_t ino = parent_ino(file->f_path.dentry); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 266 | dout("readdir off 1 -> '..'\n"); |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 267 | if (!dir_emit(ctx, "..", 2, |
Yehuda Sadeh | ad1fee9 | 2011-01-21 16:44:03 -0800 | [diff] [blame] | 268 | ceph_translate_ino(inode->i_sb, ino), |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 269 | inode->i_mode >> 12)) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 270 | return 0; |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 271 | ctx->pos = 2; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 272 | off = 2; |
| 273 | } |
| 274 | |
| 275 | /* can we use the dcache? */ |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 276 | spin_lock(&ci->i_ceph_lock); |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 277 | if (ceph_test_mount_opt(fsc, DCACHE) && |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 278 | !ceph_test_mount_opt(fsc, NOASYNCREADDIR) && |
Sage Weil | a0dff78 | 2010-07-22 13:47:21 -0700 | [diff] [blame] | 279 | ceph_snap(inode) != CEPH_SNAPDIR && |
Yan, Zheng | 70db4f3 | 2014-10-21 18:09:56 -0700 | [diff] [blame] | 280 | __ceph_dir_is_complete_ordered(ci) && |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 281 | __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) { |
Yan, Zheng | a30be7c | 2014-04-06 14:10:04 +0800 | [diff] [blame] | 282 | u32 shared_gen = ci->i_shared_gen; |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 283 | spin_unlock(&ci->i_ceph_lock); |
Yan, Zheng | a30be7c | 2014-04-06 14:10:04 +0800 | [diff] [blame] | 284 | err = __dcache_readdir(file, ctx, shared_gen); |
Sage Weil | efa4c12 | 2010-10-18 14:04:31 -0700 | [diff] [blame] | 285 | if (err != -EAGAIN) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 286 | return err; |
Yan, Zheng | 0081bd8 | 2014-04-08 21:42:59 +0800 | [diff] [blame] | 287 | frag = fpos_frag(ctx->pos); |
| 288 | off = fpos_off(ctx->pos); |
Sage Weil | efa4c12 | 2010-10-18 14:04:31 -0700 | [diff] [blame] | 289 | } else { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 290 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 291 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 292 | |
| 293 | /* proceed with a normal readdir */ |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 294 | more: |
| 295 | /* do we have the correct frag content buffered? */ |
| 296 | if (fi->frag != frag || fi->last_readdir == NULL) { |
| 297 | struct ceph_mds_request *req; |
| 298 | int op = ceph_snap(inode) == CEPH_SNAPDIR ? |
| 299 | CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR; |
| 300 | |
| 301 | /* discard old result, if any */ |
Sage Weil | 393f662 | 2010-03-10 12:03:32 -0800 | [diff] [blame] | 302 | if (fi->last_readdir) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 303 | ceph_mdsc_put_request(fi->last_readdir); |
Sage Weil | 393f662 | 2010-03-10 12:03:32 -0800 | [diff] [blame] | 304 | fi->last_readdir = NULL; |
| 305 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 306 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 307 | dout("readdir fetching %llx.%llx frag %x offset '%s'\n", |
| 308 | ceph_vinop(inode), frag, fi->last_name); |
| 309 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
| 310 | if (IS_ERR(req)) |
| 311 | return PTR_ERR(req); |
Yan, Zheng | 5400839 | 2014-03-29 13:41:15 +0800 | [diff] [blame] | 312 | err = ceph_alloc_readdir_reply_buffer(req, inode); |
| 313 | if (err) { |
| 314 | ceph_mdsc_put_request(req); |
| 315 | return err; |
| 316 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 317 | /* hints to request -> mds selection code */ |
| 318 | req->r_direct_mode = USE_AUTH_MDS; |
| 319 | req->r_direct_hash = ceph_frag_value(frag); |
| 320 | req->r_direct_is_hash = true; |
Sanidhya Kashyap | a149bb9 | 2015-03-21 12:54:58 -0400 | [diff] [blame] | 321 | if (fi->last_name) { |
Yan, Zheng | 687265e | 2015-06-13 17:27:05 +0800 | [diff] [blame] | 322 | req->r_path2 = kstrdup(fi->last_name, GFP_KERNEL); |
Sanidhya Kashyap | a149bb9 | 2015-03-21 12:54:58 -0400 | [diff] [blame] | 323 | if (!req->r_path2) { |
| 324 | ceph_mdsc_put_request(req); |
| 325 | return -ENOMEM; |
| 326 | } |
| 327 | } |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 328 | req->r_dir_release_cnt = fi->dir_release_count; |
| 329 | req->r_dir_ordered_cnt = fi->dir_ordered_count; |
| 330 | req->r_readdir_cache_idx = fi->readdir_cache_idx; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 331 | req->r_readdir_offset = fi->next_offset; |
| 332 | req->r_args.readdir.frag = cpu_to_le32(frag); |
Sanidhya Kashyap | a149bb9 | 2015-03-21 12:54:58 -0400 | [diff] [blame] | 333 | |
| 334 | req->r_inode = inode; |
| 335 | ihold(inode); |
| 336 | req->r_dentry = dget(file->f_path.dentry); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 337 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
| 338 | if (err < 0) { |
| 339 | ceph_mdsc_put_request(req); |
| 340 | return err; |
| 341 | } |
| 342 | dout("readdir got and parsed readdir result=%d" |
| 343 | " on frag %x, end=%d, complete=%d\n", err, frag, |
| 344 | (int)req->r_reply_info.dir_end, |
| 345 | (int)req->r_reply_info.dir_complete); |
| 346 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 347 | |
| 348 | /* note next offset and last dentry name */ |
Yan, Zheng | 81c6aea | 2013-09-18 09:44:13 +0800 | [diff] [blame] | 349 | rinfo = &req->r_reply_info; |
| 350 | if (le32_to_cpu(rinfo->dir_dir->frag) != frag) { |
| 351 | frag = le32_to_cpu(rinfo->dir_dir->frag); |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 352 | off = req->r_readdir_offset; |
| 353 | fi->next_offset = off; |
Yan, Zheng | 81c6aea | 2013-09-18 09:44:13 +0800 | [diff] [blame] | 354 | } |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 355 | |
Yan, Zheng | f049420 | 2014-02-27 16:26:24 +0800 | [diff] [blame] | 356 | fi->frag = frag; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 357 | fi->offset = fi->next_offset; |
| 358 | fi->last_readdir = req; |
| 359 | |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 360 | if (req->r_did_prepopulate) { |
| 361 | fi->readdir_cache_idx = req->r_readdir_cache_idx; |
| 362 | if (fi->readdir_cache_idx < 0) { |
| 363 | /* preclude from marking dir ordered */ |
| 364 | fi->dir_ordered_count = 0; |
| 365 | } else if (ceph_frag_is_leftmost(frag) && off == 2) { |
| 366 | /* note dir version at start of readdir so |
| 367 | * we can tell if any dentries get dropped */ |
| 368 | fi->dir_release_count = req->r_dir_release_cnt; |
| 369 | fi->dir_ordered_count = req->r_dir_ordered_cnt; |
| 370 | } |
| 371 | } else { |
| 372 | dout("readdir !did_prepopulate"); |
| 373 | /* disable readdir cache */ |
| 374 | fi->readdir_cache_idx = -1; |
| 375 | /* preclude from marking dir complete */ |
| 376 | fi->dir_release_count = 0; |
| 377 | } |
| 378 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 379 | if (req->r_reply_info.dir_end) { |
| 380 | kfree(fi->last_name); |
| 381 | fi->last_name = NULL; |
Sage Weil | 7b88dad | 2010-11-11 16:48:59 -0800 | [diff] [blame] | 382 | if (ceph_frag_is_rightmost(frag)) |
| 383 | fi->next_offset = 2; |
| 384 | else |
| 385 | fi->next_offset = 0; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 386 | } else { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 387 | err = note_last_dentry(fi, |
| 388 | rinfo->dir_dname[rinfo->dir_nr-1], |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 389 | rinfo->dir_dname_len[rinfo->dir_nr-1], |
| 390 | fi->next_offset + rinfo->dir_nr); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 391 | if (err) |
| 392 | return err; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 393 | } |
| 394 | } |
| 395 | |
| 396 | rinfo = &fi->last_readdir->r_reply_info; |
| 397 | dout("readdir frag %x num %d off %d chunkoff %d\n", frag, |
| 398 | rinfo->dir_nr, off, fi->offset); |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 399 | |
| 400 | ctx->pos = ceph_make_fpos(frag, off); |
Sage Weil | da39822 | 2011-05-12 15:28:11 -0700 | [diff] [blame] | 401 | while (off >= fi->offset && off - fi->offset < rinfo->dir_nr) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 402 | struct ceph_mds_reply_inode *in = |
| 403 | rinfo->dir_in[off - fi->offset].in; |
Sage Weil | 3105c19 | 2010-11-18 09:15:07 -0800 | [diff] [blame] | 404 | struct ceph_vino vino; |
| 405 | ino_t ino; |
| 406 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 407 | dout("readdir off %d (%d/%d) -> %lld '%.*s' %p\n", |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 408 | off, off - fi->offset, rinfo->dir_nr, ctx->pos, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 409 | rinfo->dir_dname_len[off - fi->offset], |
| 410 | rinfo->dir_dname[off - fi->offset], in); |
| 411 | BUG_ON(!in); |
| 412 | ftype = le32_to_cpu(in->mode) >> 12; |
Sage Weil | 3105c19 | 2010-11-18 09:15:07 -0800 | [diff] [blame] | 413 | vino.ino = le64_to_cpu(in->ino); |
| 414 | vino.snap = le64_to_cpu(in->snapid); |
| 415 | ino = ceph_vino_to_ino(vino); |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 416 | if (!dir_emit(ctx, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 417 | rinfo->dir_dname[off - fi->offset], |
| 418 | rinfo->dir_dname_len[off - fi->offset], |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 419 | ceph_translate_ino(inode->i_sb, ino), ftype)) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 420 | dout("filldir stopping us...\n"); |
| 421 | return 0; |
| 422 | } |
| 423 | off++; |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 424 | ctx->pos++; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 425 | } |
| 426 | |
| 427 | if (fi->last_name) { |
| 428 | ceph_mdsc_put_request(fi->last_readdir); |
| 429 | fi->last_readdir = NULL; |
| 430 | goto more; |
| 431 | } |
| 432 | |
| 433 | /* more frags? */ |
| 434 | if (!ceph_frag_is_rightmost(frag)) { |
| 435 | frag = ceph_frag_next(frag); |
| 436 | off = 0; |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 437 | ctx->pos = ceph_make_fpos(frag, off); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 438 | dout("readdir next frag is %x\n", frag); |
| 439 | goto more; |
| 440 | } |
Sage Weil | 9cfa109 | 2011-07-26 11:26:18 -0700 | [diff] [blame] | 441 | fi->flags |= CEPH_F_ATEND; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 442 | |
| 443 | /* |
| 444 | * if dir_release_count still matches the dir, no dentries |
| 445 | * were released during the whole readdir, and we should have |
| 446 | * the complete dir contents in our cache. |
| 447 | */ |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 448 | if (atomic64_read(&ci->i_release_count) == fi->dir_release_count) { |
| 449 | spin_lock(&ci->i_ceph_lock); |
| 450 | if (fi->dir_ordered_count == atomic64_read(&ci->i_ordered_count)) { |
Yan, Zheng | 70db4f3 | 2014-10-21 18:09:56 -0700 | [diff] [blame] | 451 | dout(" marking %p complete and ordered\n", inode); |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 452 | /* use i_size to track number of entries in |
| 453 | * readdir cache */ |
| 454 | BUG_ON(fi->readdir_cache_idx < 0); |
| 455 | i_size_write(inode, fi->readdir_cache_idx * |
| 456 | sizeof(struct dentry*)); |
| 457 | } else { |
Yan, Zheng | 70db4f3 | 2014-10-21 18:09:56 -0700 | [diff] [blame] | 458 | dout(" marking %p complete\n", inode); |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 459 | } |
Yan, Zheng | 70db4f3 | 2014-10-21 18:09:56 -0700 | [diff] [blame] | 460 | __ceph_dir_set_complete(ci, fi->dir_release_count, |
| 461 | fi->dir_ordered_count); |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 462 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 463 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 464 | |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 465 | dout("readdir %p file %p done.\n", inode, file); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 466 | return 0; |
| 467 | } |
| 468 | |
Yan, Zheng | dcd3cc0 | 2014-02-28 16:36:09 +0800 | [diff] [blame] | 469 | static void reset_readdir(struct ceph_file_info *fi, unsigned frag) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 470 | { |
| 471 | if (fi->last_readdir) { |
| 472 | ceph_mdsc_put_request(fi->last_readdir); |
| 473 | fi->last_readdir = NULL; |
| 474 | } |
| 475 | kfree(fi->last_name); |
Sage Weil | a1629c3 | 2010-11-11 15:24:06 -0800 | [diff] [blame] | 476 | fi->last_name = NULL; |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 477 | fi->dir_release_count = 0; |
| 478 | fi->readdir_cache_idx = -1; |
Yan, Zheng | dcd3cc0 | 2014-02-28 16:36:09 +0800 | [diff] [blame] | 479 | if (ceph_frag_is_leftmost(frag)) |
| 480 | fi->next_offset = 2; /* compensate for . and .. */ |
| 481 | else |
| 482 | fi->next_offset = 0; |
Sage Weil | 9cfa109 | 2011-07-26 11:26:18 -0700 | [diff] [blame] | 483 | fi->flags &= ~CEPH_F_ATEND; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 484 | } |
| 485 | |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 486 | static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 487 | { |
| 488 | struct ceph_file_info *fi = file->private_data; |
| 489 | struct inode *inode = file->f_mapping->host; |
Yan, Zheng | f049420 | 2014-02-27 16:26:24 +0800 | [diff] [blame] | 490 | loff_t old_offset = ceph_make_fpos(fi->frag, fi->next_offset); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 491 | loff_t retval; |
| 492 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 493 | inode_lock(inode); |
Josef Bacik | 06222e4 | 2011-07-18 13:21:38 -0400 | [diff] [blame] | 494 | retval = -EINVAL; |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 495 | switch (whence) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 496 | case SEEK_CUR: |
| 497 | offset += file->f_pos; |
Josef Bacik | 06222e4 | 2011-07-18 13:21:38 -0400 | [diff] [blame] | 498 | case SEEK_SET: |
| 499 | break; |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 500 | case SEEK_END: |
| 501 | retval = -EOPNOTSUPP; |
Josef Bacik | 06222e4 | 2011-07-18 13:21:38 -0400 | [diff] [blame] | 502 | default: |
| 503 | goto out; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 504 | } |
Josef Bacik | 06222e4 | 2011-07-18 13:21:38 -0400 | [diff] [blame] | 505 | |
Yan, Zheng | f049420 | 2014-02-27 16:26:24 +0800 | [diff] [blame] | 506 | if (offset >= 0) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 507 | if (offset != file->f_pos) { |
| 508 | file->f_pos = offset; |
| 509 | file->f_version = 0; |
Sage Weil | 9cfa109 | 2011-07-26 11:26:18 -0700 | [diff] [blame] | 510 | fi->flags &= ~CEPH_F_ATEND; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 511 | } |
| 512 | retval = offset; |
| 513 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 514 | if (offset == 0 || |
Yan, Zheng | f049420 | 2014-02-27 16:26:24 +0800 | [diff] [blame] | 515 | fpos_frag(offset) != fi->frag || |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 516 | fpos_off(offset) < fi->offset) { |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 517 | /* discard buffered readdir content on seekdir(0), or |
| 518 | * seek to new frag, or seek prior to current chunk */ |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 519 | dout("dir_llseek dropping %p content\n", file); |
Yan, Zheng | dcd3cc0 | 2014-02-28 16:36:09 +0800 | [diff] [blame] | 520 | reset_readdir(fi, fpos_frag(offset)); |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 521 | } else if (fpos_cmp(offset, old_offset) > 0) { |
| 522 | /* reset dir_release_count if we did a forward seek */ |
| 523 | fi->dir_release_count = 0; |
| 524 | fi->readdir_cache_idx = -1; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 525 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 526 | } |
Josef Bacik | 06222e4 | 2011-07-18 13:21:38 -0400 | [diff] [blame] | 527 | out: |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 528 | inode_unlock(inode); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 529 | return retval; |
| 530 | } |
| 531 | |
| 532 | /* |
Sage Weil | 468640e | 2011-07-26 11:28:11 -0700 | [diff] [blame] | 533 | * Handle lookups for the hidden .snap directory. |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 534 | */ |
Sage Weil | 468640e | 2011-07-26 11:28:11 -0700 | [diff] [blame] | 535 | int ceph_handle_snapdir(struct ceph_mds_request *req, |
| 536 | struct dentry *dentry, int err) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 537 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 538 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 539 | struct inode *parent = d_inode(dentry->d_parent); /* we hold i_mutex */ |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 540 | |
| 541 | /* .snap dir? */ |
| 542 | if (err == -ENOENT && |
Sage Weil | 455cec0 | 2011-03-03 13:44:35 -0800 | [diff] [blame] | 543 | ceph_snap(parent) == CEPH_NOSNAP && |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 544 | strcmp(dentry->d_name.name, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 545 | fsc->mount_options->snapdir_name) == 0) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 546 | struct inode *inode = ceph_get_snapdir(parent); |
Al Viro | a455589 | 2014-10-21 20:11:25 -0400 | [diff] [blame] | 547 | dout("ENOENT on snapdir %p '%pd', linking to snapdir %p\n", |
| 548 | dentry, dentry, inode); |
Sage Weil | 9358c6d | 2010-03-30 13:54:41 -0700 | [diff] [blame] | 549 | BUG_ON(!d_unhashed(dentry)); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 550 | d_add(dentry, inode); |
| 551 | err = 0; |
| 552 | } |
Sage Weil | 468640e | 2011-07-26 11:28:11 -0700 | [diff] [blame] | 553 | return err; |
| 554 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 555 | |
Sage Weil | 468640e | 2011-07-26 11:28:11 -0700 | [diff] [blame] | 556 | /* |
| 557 | * Figure out final result of a lookup/open request. |
| 558 | * |
| 559 | * Mainly, make sure we return the final req->r_dentry (if it already |
| 560 | * existed) in place of the original VFS-provided dentry when they |
| 561 | * differ. |
| 562 | * |
| 563 | * Gracefully handle the case where the MDS replies with -ENOENT and |
| 564 | * no trace (which it may do, at its discretion, e.g., if it doesn't |
| 565 | * care to issue a lease on the negative dentry). |
| 566 | */ |
| 567 | struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, |
| 568 | struct dentry *dentry, int err) |
| 569 | { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 570 | if (err == -ENOENT) { |
| 571 | /* no trace? */ |
| 572 | err = 0; |
| 573 | if (!req->r_reply_info.head->is_dentry) { |
| 574 | dout("ENOENT and no trace, dentry %p inode %p\n", |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 575 | dentry, d_inode(dentry)); |
| 576 | if (d_really_is_positive(dentry)) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 577 | d_drop(dentry); |
| 578 | err = -ENOENT; |
| 579 | } else { |
| 580 | d_add(dentry, NULL); |
| 581 | } |
| 582 | } |
| 583 | } |
| 584 | if (err) |
| 585 | dentry = ERR_PTR(err); |
| 586 | else if (dentry != req->r_dentry) |
| 587 | dentry = dget(req->r_dentry); /* we got spliced */ |
| 588 | else |
| 589 | dentry = NULL; |
| 590 | return dentry; |
| 591 | } |
| 592 | |
Sage Weil | 1d1de916 | 2009-12-02 11:54:25 -0800 | [diff] [blame] | 593 | static int is_root_ceph_dentry(struct inode *inode, struct dentry *dentry) |
| 594 | { |
| 595 | return ceph_ino(inode) == CEPH_INO_ROOT && |
| 596 | strncmp(dentry->d_name.name, ".ceph", 5) == 0; |
| 597 | } |
| 598 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 599 | /* |
| 600 | * Look up a single dir entry. If there is a lookup intent, inform |
| 601 | * the MDS so that it gets our 'caps wanted' value in a single op. |
| 602 | */ |
| 603 | static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry, |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 604 | unsigned int flags) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 605 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 606 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
| 607 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 608 | struct ceph_mds_request *req; |
| 609 | int op; |
Yan, Zheng | 315f240 | 2016-03-07 10:34:50 +0800 | [diff] [blame] | 610 | int mask; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 611 | int err; |
| 612 | |
Al Viro | a455589 | 2014-10-21 20:11:25 -0400 | [diff] [blame] | 613 | dout("lookup %p dentry %p '%pd'\n", |
| 614 | dir, dentry, dentry); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 615 | |
| 616 | if (dentry->d_name.len > NAME_MAX) |
| 617 | return ERR_PTR(-ENAMETOOLONG); |
| 618 | |
| 619 | err = ceph_init_dentry(dentry); |
| 620 | if (err < 0) |
| 621 | return ERR_PTR(err); |
| 622 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 623 | /* can we conclude ENOENT locally? */ |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 624 | if (d_really_is_negative(dentry)) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 625 | struct ceph_inode_info *ci = ceph_inode(dir); |
| 626 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
| 627 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 628 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 629 | dout(" dir %p flags are %d\n", dir, ci->i_ceph_flags); |
| 630 | if (strncmp(dentry->d_name.name, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 631 | fsc->mount_options->snapdir_name, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 632 | dentry->d_name.len) && |
Sage Weil | 1d1de916 | 2009-12-02 11:54:25 -0800 | [diff] [blame] | 633 | !is_root_ceph_dentry(dir, dentry) && |
Yan, Zheng | e2c3de0 | 2015-03-04 16:05:04 +0800 | [diff] [blame] | 634 | ceph_test_mount_opt(fsc, DCACHE) && |
Yan, Zheng | 2f276c5 | 2013-03-13 19:44:32 +0800 | [diff] [blame] | 635 | __ceph_dir_is_complete(ci) && |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 636 | (__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 637 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 638 | dout(" dir %p complete, -ENOENT\n", dir); |
| 639 | d_add(dentry, NULL); |
| 640 | di->lease_shared_gen = ci->i_shared_gen; |
| 641 | return NULL; |
| 642 | } |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 643 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 644 | } |
| 645 | |
| 646 | op = ceph_snap(dir) == CEPH_SNAPDIR ? |
| 647 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; |
| 648 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); |
| 649 | if (IS_ERR(req)) |
Julia Lawall | 7e34bc5 | 2010-05-22 12:01:14 +0200 | [diff] [blame] | 650 | return ERR_CAST(req); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 651 | req->r_dentry = dget(dentry); |
| 652 | req->r_num_caps = 2; |
Yan, Zheng | 315f240 | 2016-03-07 10:34:50 +0800 | [diff] [blame] | 653 | |
| 654 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; |
| 655 | if (ceph_security_xattr_wanted(dir)) |
| 656 | mask |= CEPH_CAP_XATTR_SHARED; |
| 657 | req->r_args.getattr.mask = cpu_to_le32(mask); |
| 658 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 659 | req->r_locked_dir = dir; |
| 660 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
Sage Weil | 468640e | 2011-07-26 11:28:11 -0700 | [diff] [blame] | 661 | err = ceph_handle_snapdir(req, dentry, err); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 662 | dentry = ceph_finish_lookup(req, dentry, err); |
| 663 | ceph_mdsc_put_request(req); /* will dput(dentry) */ |
| 664 | dout("lookup result=%p\n", dentry); |
| 665 | return dentry; |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * If we do a create but get no trace back from the MDS, follow up with |
| 670 | * a lookup (the VFS expects us to link up the provided dentry). |
| 671 | */ |
| 672 | int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry) |
| 673 | { |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 674 | struct dentry *result = ceph_lookup(dir, dentry, 0); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 675 | |
| 676 | if (result && !IS_ERR(result)) { |
| 677 | /* |
| 678 | * We created the item, then did a lookup, and found |
| 679 | * it was already linked to another inode we already |
Yan, Zheng | 4d41cef | 2015-02-04 15:10:48 +0800 | [diff] [blame] | 680 | * had in our cache (and thus got spliced). To not |
| 681 | * confuse VFS (especially when inode is a directory), |
| 682 | * we don't link our dentry to that inode, return an |
| 683 | * error instead. |
| 684 | * |
| 685 | * This event should be rare and it happens only when |
| 686 | * we talk to old MDS. Recent MDS does not send traceless |
| 687 | * reply for request that creates new inode. |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 688 | */ |
Yan, Zheng | 5cba372 | 2015-02-02 11:27:56 +0800 | [diff] [blame] | 689 | d_drop(result); |
Yan, Zheng | 4d41cef | 2015-02-04 15:10:48 +0800 | [diff] [blame] | 690 | return -ESTALE; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 691 | } |
| 692 | return PTR_ERR(result); |
| 693 | } |
| 694 | |
| 695 | static int ceph_mknod(struct inode *dir, struct dentry *dentry, |
Al Viro | 1a67aaf | 2011-07-26 01:52:52 -0400 | [diff] [blame] | 696 | umode_t mode, dev_t rdev) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 697 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 698 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
| 699 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 700 | struct ceph_mds_request *req; |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 701 | struct ceph_acls_info acls = {}; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 702 | int err; |
| 703 | |
| 704 | if (ceph_snap(dir) != CEPH_NOSNAP) |
| 705 | return -EROFS; |
| 706 | |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 707 | err = ceph_pre_init_acls(dir, &mode, &acls); |
| 708 | if (err < 0) |
| 709 | return err; |
| 710 | |
Al Viro | 1a67aaf | 2011-07-26 01:52:52 -0400 | [diff] [blame] | 711 | dout("mknod in dir %p dentry %p mode 0%ho rdev %d\n", |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 712 | dir, dentry, mode, rdev); |
| 713 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS); |
| 714 | if (IS_ERR(req)) { |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 715 | err = PTR_ERR(req); |
| 716 | goto out; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 717 | } |
| 718 | req->r_dentry = dget(dentry); |
| 719 | req->r_num_caps = 2; |
| 720 | req->r_locked_dir = dir; |
| 721 | req->r_args.mknod.mode = cpu_to_le32(mode); |
| 722 | req->r_args.mknod.rdev = cpu_to_le32(rdev); |
| 723 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
| 724 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 725 | if (acls.pagelist) { |
| 726 | req->r_pagelist = acls.pagelist; |
| 727 | acls.pagelist = NULL; |
| 728 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 729 | err = ceph_mdsc_do_request(mdsc, dir, req); |
| 730 | if (!err && !req->r_reply_info.head->is_dentry) |
| 731 | err = ceph_handle_notrace_create(dir, dentry); |
| 732 | ceph_mdsc_put_request(req); |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 733 | out: |
Guangliang Zhao | 7221fe4 | 2013-11-11 15:18:03 +0800 | [diff] [blame] | 734 | if (!err) |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 735 | ceph_init_inode_acls(d_inode(dentry), &acls); |
Yan, Zheng | b20a95a | 2014-02-11 12:55:05 +0800 | [diff] [blame] | 736 | else |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 737 | d_drop(dentry); |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 738 | ceph_release_acls_info(&acls); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 739 | return err; |
| 740 | } |
| 741 | |
Al Viro | 4acdaf2 | 2011-07-26 01:42:34 -0400 | [diff] [blame] | 742 | static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
Al Viro | ebfc3b4 | 2012-06-10 18:05:36 -0400 | [diff] [blame] | 743 | bool excl) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 744 | { |
Miklos Szeredi | 2d83bde | 2012-06-05 15:10:25 +0200 | [diff] [blame] | 745 | return ceph_mknod(dir, dentry, mode, 0); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 746 | } |
| 747 | |
| 748 | static int ceph_symlink(struct inode *dir, struct dentry *dentry, |
| 749 | const char *dest) |
| 750 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 751 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
| 752 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 753 | struct ceph_mds_request *req; |
| 754 | int err; |
| 755 | |
| 756 | if (ceph_snap(dir) != CEPH_NOSNAP) |
| 757 | return -EROFS; |
| 758 | |
| 759 | dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest); |
| 760 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS); |
| 761 | if (IS_ERR(req)) { |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 762 | err = PTR_ERR(req); |
| 763 | goto out; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 764 | } |
Yan, Zheng | 687265e | 2015-06-13 17:27:05 +0800 | [diff] [blame] | 765 | req->r_path2 = kstrdup(dest, GFP_KERNEL); |
Sanidhya Kashyap | a149bb9 | 2015-03-21 12:54:58 -0400 | [diff] [blame] | 766 | if (!req->r_path2) { |
| 767 | err = -ENOMEM; |
| 768 | ceph_mdsc_put_request(req); |
| 769 | goto out; |
| 770 | } |
| 771 | req->r_locked_dir = dir; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 772 | req->r_dentry = dget(dentry); |
| 773 | req->r_num_caps = 2; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 774 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
| 775 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
| 776 | err = ceph_mdsc_do_request(mdsc, dir, req); |
| 777 | if (!err && !req->r_reply_info.head->is_dentry) |
| 778 | err = ceph_handle_notrace_create(dir, dentry); |
| 779 | ceph_mdsc_put_request(req); |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 780 | out: |
| 781 | if (err) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 782 | d_drop(dentry); |
| 783 | return err; |
| 784 | } |
| 785 | |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 786 | static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 787 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 788 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
| 789 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 790 | struct ceph_mds_request *req; |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 791 | struct ceph_acls_info acls = {}; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 792 | int err = -EROFS; |
| 793 | int op; |
| 794 | |
| 795 | if (ceph_snap(dir) == CEPH_SNAPDIR) { |
| 796 | /* mkdir .snap/foo is a MKSNAP */ |
| 797 | op = CEPH_MDS_OP_MKSNAP; |
Al Viro | a455589 | 2014-10-21 20:11:25 -0400 | [diff] [blame] | 798 | dout("mksnap dir %p snap '%pd' dn %p\n", dir, |
| 799 | dentry, dentry); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 800 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 801 | dout("mkdir dir %p dn %p mode 0%ho\n", dir, dentry, mode); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 802 | op = CEPH_MDS_OP_MKDIR; |
| 803 | } else { |
| 804 | goto out; |
| 805 | } |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 806 | |
| 807 | mode |= S_IFDIR; |
| 808 | err = ceph_pre_init_acls(dir, &mode, &acls); |
| 809 | if (err < 0) |
| 810 | goto out; |
| 811 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 812 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
| 813 | if (IS_ERR(req)) { |
| 814 | err = PTR_ERR(req); |
| 815 | goto out; |
| 816 | } |
| 817 | |
| 818 | req->r_dentry = dget(dentry); |
| 819 | req->r_num_caps = 2; |
| 820 | req->r_locked_dir = dir; |
| 821 | req->r_args.mkdir.mode = cpu_to_le32(mode); |
| 822 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
| 823 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 824 | if (acls.pagelist) { |
| 825 | req->r_pagelist = acls.pagelist; |
| 826 | acls.pagelist = NULL; |
| 827 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 828 | err = ceph_mdsc_do_request(mdsc, dir, req); |
Yan, Zheng | 275dd19 | 2014-12-10 16:17:31 +0800 | [diff] [blame] | 829 | if (!err && |
| 830 | !req->r_reply_info.head->is_target && |
| 831 | !req->r_reply_info.head->is_dentry) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 832 | err = ceph_handle_notrace_create(dir, dentry); |
| 833 | ceph_mdsc_put_request(req); |
| 834 | out: |
Yan, Zheng | b20a95a | 2014-02-11 12:55:05 +0800 | [diff] [blame] | 835 | if (!err) |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 836 | ceph_init_inode_acls(d_inode(dentry), &acls); |
Yan, Zheng | b20a95a | 2014-02-11 12:55:05 +0800 | [diff] [blame] | 837 | else |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 838 | d_drop(dentry); |
Yan, Zheng | b1ee94a | 2014-09-16 20:35:17 +0800 | [diff] [blame] | 839 | ceph_release_acls_info(&acls); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 840 | return err; |
| 841 | } |
| 842 | |
| 843 | static int ceph_link(struct dentry *old_dentry, struct inode *dir, |
| 844 | struct dentry *dentry) |
| 845 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 846 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
| 847 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 848 | struct ceph_mds_request *req; |
| 849 | int err; |
| 850 | |
| 851 | if (ceph_snap(dir) != CEPH_NOSNAP) |
| 852 | return -EROFS; |
| 853 | |
| 854 | dout("link in dir %p old_dentry %p dentry %p\n", dir, |
| 855 | old_dentry, dentry); |
| 856 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS); |
| 857 | if (IS_ERR(req)) { |
| 858 | d_drop(dentry); |
| 859 | return PTR_ERR(req); |
| 860 | } |
| 861 | req->r_dentry = dget(dentry); |
| 862 | req->r_num_caps = 2; |
Sage Weil | 4b58c9b | 2013-02-05 13:41:23 -0800 | [diff] [blame] | 863 | req->r_old_dentry = dget(old_dentry); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 864 | req->r_locked_dir = dir; |
| 865 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
| 866 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
Yan, Zheng | ad88f23 | 2013-07-21 20:25:25 +0800 | [diff] [blame] | 867 | /* release LINK_SHARED on source inode (mds will lock it) */ |
| 868 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 869 | err = ceph_mdsc_do_request(mdsc, dir, req); |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 870 | if (err) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 871 | d_drop(dentry); |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 872 | } else if (!req->r_reply_info.head->is_dentry) { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 873 | ihold(d_inode(old_dentry)); |
| 874 | d_instantiate(dentry, d_inode(old_dentry)); |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 875 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 876 | ceph_mdsc_put_request(req); |
| 877 | return err; |
| 878 | } |
| 879 | |
| 880 | /* |
| 881 | * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it |
| 882 | * looks like the link count will hit 0, drop any other caps (other |
| 883 | * than PIN) we don't specifically want (due to the file still being |
| 884 | * open). |
| 885 | */ |
| 886 | static int drop_caps_for_unlink(struct inode *inode) |
| 887 | { |
| 888 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 889 | int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL; |
| 890 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 891 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 892 | if (inode->i_nlink == 1) { |
| 893 | drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN); |
| 894 | ci->i_ceph_flags |= CEPH_I_NODELAY; |
| 895 | } |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 896 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 897 | return drop; |
| 898 | } |
| 899 | |
| 900 | /* |
| 901 | * rmdir and unlink are differ only by the metadata op code |
| 902 | */ |
| 903 | static int ceph_unlink(struct inode *dir, struct dentry *dentry) |
| 904 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 905 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
| 906 | struct ceph_mds_client *mdsc = fsc->mdsc; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 907 | struct inode *inode = d_inode(dentry); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 908 | struct ceph_mds_request *req; |
| 909 | int err = -EROFS; |
| 910 | int op; |
| 911 | |
| 912 | if (ceph_snap(dir) == CEPH_SNAPDIR) { |
| 913 | /* rmdir .snap/foo is RMSNAP */ |
Al Viro | a455589 | 2014-10-21 20:11:25 -0400 | [diff] [blame] | 914 | dout("rmsnap dir %p '%pd' dn %p\n", dir, dentry, dentry); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 915 | op = CEPH_MDS_OP_RMSNAP; |
| 916 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { |
| 917 | dout("unlink/rmdir dir %p dn %p inode %p\n", |
| 918 | dir, dentry, inode); |
David Howells | e36cb0b | 2015-01-29 12:02:35 +0000 | [diff] [blame] | 919 | op = d_is_dir(dentry) ? |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 920 | CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK; |
| 921 | } else |
| 922 | goto out; |
| 923 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
| 924 | if (IS_ERR(req)) { |
| 925 | err = PTR_ERR(req); |
| 926 | goto out; |
| 927 | } |
| 928 | req->r_dentry = dget(dentry); |
| 929 | req->r_num_caps = 2; |
| 930 | req->r_locked_dir = dir; |
| 931 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
| 932 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
| 933 | req->r_inode_drop = drop_caps_for_unlink(inode); |
| 934 | err = ceph_mdsc_do_request(mdsc, dir, req); |
| 935 | if (!err && !req->r_reply_info.head->is_dentry) |
| 936 | d_delete(dentry); |
| 937 | ceph_mdsc_put_request(req); |
| 938 | out: |
| 939 | return err; |
| 940 | } |
| 941 | |
| 942 | static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 943 | struct inode *new_dir, struct dentry *new_dentry) |
| 944 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 945 | struct ceph_fs_client *fsc = ceph_sb_to_client(old_dir->i_sb); |
| 946 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 947 | struct ceph_mds_request *req; |
Yan, Zheng | 0ea611a | 2015-04-07 15:36:32 +0800 | [diff] [blame] | 948 | int op = CEPH_MDS_OP_RENAME; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 949 | int err; |
| 950 | |
| 951 | if (ceph_snap(old_dir) != ceph_snap(new_dir)) |
| 952 | return -EXDEV; |
Yan, Zheng | 0ea611a | 2015-04-07 15:36:32 +0800 | [diff] [blame] | 953 | if (ceph_snap(old_dir) != CEPH_NOSNAP) { |
| 954 | if (old_dir == new_dir && ceph_snap(old_dir) == CEPH_SNAPDIR) |
| 955 | op = CEPH_MDS_OP_RENAMESNAP; |
| 956 | else |
| 957 | return -EROFS; |
| 958 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 959 | dout("rename dir %p dentry %p to dir %p dentry %p\n", |
| 960 | old_dir, old_dentry, new_dir, new_dentry); |
Yan, Zheng | 0ea611a | 2015-04-07 15:36:32 +0800 | [diff] [blame] | 961 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 962 | if (IS_ERR(req)) |
| 963 | return PTR_ERR(req); |
Sage Weil | 180061a | 2013-02-05 13:36:05 -0800 | [diff] [blame] | 964 | ihold(old_dir); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 965 | req->r_dentry = dget(new_dentry); |
| 966 | req->r_num_caps = 2; |
| 967 | req->r_old_dentry = dget(old_dentry); |
Sage Weil | 180061a | 2013-02-05 13:36:05 -0800 | [diff] [blame] | 968 | req->r_old_dentry_dir = old_dir; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 969 | req->r_locked_dir = new_dir; |
| 970 | req->r_old_dentry_drop = CEPH_CAP_FILE_SHARED; |
| 971 | req->r_old_dentry_unless = CEPH_CAP_FILE_EXCL; |
| 972 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
| 973 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
| 974 | /* release LINK_RDCACHE on source inode (mds will lock it) */ |
| 975 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 976 | if (d_really_is_positive(new_dentry)) |
| 977 | req->r_inode_drop = drop_caps_for_unlink(d_inode(new_dentry)); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 978 | err = ceph_mdsc_do_request(mdsc, old_dir, req); |
| 979 | if (!err && !req->r_reply_info.head->is_dentry) { |
| 980 | /* |
| 981 | * Normally d_move() is done by fill_trace (called by |
| 982 | * do_request, above). If there is no trace, we need |
| 983 | * to do it here. |
| 984 | */ |
Sage Weil | ea1409f | 2010-04-28 16:12:06 -0700 | [diff] [blame] | 985 | |
Yan, Zheng | fdd4e15 | 2015-06-16 20:48:56 +0800 | [diff] [blame] | 986 | /* d_move screws up sibling dentries' offsets */ |
| 987 | ceph_dir_clear_complete(old_dir); |
| 988 | ceph_dir_clear_complete(new_dir); |
| 989 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 990 | d_move(old_dentry, new_dentry); |
Sage Weil | ea1409f | 2010-04-28 16:12:06 -0700 | [diff] [blame] | 991 | |
| 992 | /* ensure target dentry is invalidated, despite |
| 993 | rehashing bug in vfs_rename_dir */ |
Sage Weil | 81a6cf2 | 2010-05-14 09:35:38 -0700 | [diff] [blame] | 994 | ceph_invalidate_dentry_lease(new_dentry); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 995 | } |
| 996 | ceph_mdsc_put_request(req); |
| 997 | return err; |
| 998 | } |
| 999 | |
Sage Weil | 81a6cf2 | 2010-05-14 09:35:38 -0700 | [diff] [blame] | 1000 | /* |
| 1001 | * Ensure a dentry lease will no longer revalidate. |
| 1002 | */ |
| 1003 | void ceph_invalidate_dentry_lease(struct dentry *dentry) |
| 1004 | { |
| 1005 | spin_lock(&dentry->d_lock); |
| 1006 | dentry->d_time = jiffies; |
| 1007 | ceph_dentry(dentry)->lease_shared_gen = 0; |
| 1008 | spin_unlock(&dentry->d_lock); |
| 1009 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1010 | |
| 1011 | /* |
| 1012 | * Check if dentry lease is valid. If not, delete the lease. Try to |
| 1013 | * renew if the least is more than half up. |
| 1014 | */ |
| 1015 | static int dentry_lease_is_valid(struct dentry *dentry) |
| 1016 | { |
| 1017 | struct ceph_dentry_info *di; |
| 1018 | struct ceph_mds_session *s; |
| 1019 | int valid = 0; |
| 1020 | u32 gen; |
| 1021 | unsigned long ttl; |
| 1022 | struct ceph_mds_session *session = NULL; |
| 1023 | struct inode *dir = NULL; |
| 1024 | u32 seq = 0; |
| 1025 | |
| 1026 | spin_lock(&dentry->d_lock); |
| 1027 | di = ceph_dentry(dentry); |
Sage Weil | 3d8eb7a | 2011-11-11 09:48:53 -0800 | [diff] [blame] | 1028 | if (di->lease_session) { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1029 | s = di->lease_session; |
Alex Elder | d8fb02a | 2012-01-12 17:48:10 -0800 | [diff] [blame] | 1030 | spin_lock(&s->s_gen_ttl_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1031 | gen = s->s_cap_gen; |
| 1032 | ttl = s->s_cap_ttl; |
Alex Elder | d8fb02a | 2012-01-12 17:48:10 -0800 | [diff] [blame] | 1033 | spin_unlock(&s->s_gen_ttl_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1034 | |
| 1035 | if (di->lease_gen == gen && |
| 1036 | time_before(jiffies, dentry->d_time) && |
| 1037 | time_before(jiffies, ttl)) { |
| 1038 | valid = 1; |
| 1039 | if (di->lease_renew_after && |
| 1040 | time_after(jiffies, di->lease_renew_after)) { |
| 1041 | /* we should renew */ |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1042 | dir = d_inode(dentry->d_parent); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1043 | session = ceph_get_mds_session(s); |
| 1044 | seq = di->lease_seq; |
| 1045 | di->lease_renew_after = 0; |
| 1046 | di->lease_renew_from = jiffies; |
| 1047 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1048 | } |
| 1049 | } |
| 1050 | spin_unlock(&dentry->d_lock); |
| 1051 | |
| 1052 | if (session) { |
| 1053 | ceph_mdsc_lease_send_msg(session, dir, dentry, |
| 1054 | CEPH_MDS_LEASE_RENEW, seq); |
| 1055 | ceph_put_mds_session(session); |
| 1056 | } |
| 1057 | dout("dentry_lease_is_valid - dentry %p = %d\n", dentry, valid); |
| 1058 | return valid; |
| 1059 | } |
| 1060 | |
| 1061 | /* |
| 1062 | * Check if directory-wide content lease/cap is valid. |
| 1063 | */ |
| 1064 | static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry) |
| 1065 | { |
| 1066 | struct ceph_inode_info *ci = ceph_inode(dir); |
| 1067 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
| 1068 | int valid = 0; |
| 1069 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1070 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1071 | if (ci->i_shared_gen == di->lease_shared_gen) |
| 1072 | valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1); |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 1073 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1074 | dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n", |
| 1075 | dir, (unsigned)ci->i_shared_gen, dentry, |
| 1076 | (unsigned)di->lease_shared_gen, valid); |
| 1077 | return valid; |
| 1078 | } |
| 1079 | |
| 1080 | /* |
| 1081 | * Check if cached dentry can be trusted. |
| 1082 | */ |
Al Viro | 0b728e1 | 2012-06-10 16:03:43 -0400 | [diff] [blame] | 1083 | static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1084 | { |
Sage Weil | bf1c6ac | 2011-07-26 11:30:43 -0700 | [diff] [blame] | 1085 | int valid = 0; |
Yan, Zheng | 641235d | 2016-03-16 16:40:23 +0800 | [diff] [blame] | 1086 | struct dentry *parent; |
Nick Piggin | 34286d6 | 2011-01-07 17:49:57 +1100 | [diff] [blame] | 1087 | struct inode *dir; |
| 1088 | |
Al Viro | 0b728e1 | 2012-06-10 16:03:43 -0400 | [diff] [blame] | 1089 | if (flags & LOOKUP_RCU) |
Nick Piggin | 34286d6 | 2011-01-07 17:49:57 +1100 | [diff] [blame] | 1090 | return -ECHILD; |
| 1091 | |
Al Viro | a455589 | 2014-10-21 20:11:25 -0400 | [diff] [blame] | 1092 | dout("d_revalidate %p '%pd' inode %p offset %lld\n", dentry, |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1093 | dentry, d_inode(dentry), ceph_dentry(dentry)->offset); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1094 | |
Yan, Zheng | 641235d | 2016-03-16 16:40:23 +0800 | [diff] [blame] | 1095 | parent = dget_parent(dentry); |
| 1096 | dir = d_inode(parent); |
Sage Weil | bf1c6ac | 2011-07-26 11:30:43 -0700 | [diff] [blame] | 1097 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1098 | /* always trust cached snapped dentries, snapdir dentry */ |
| 1099 | if (ceph_snap(dir) != CEPH_NOSNAP) { |
Al Viro | a455589 | 2014-10-21 20:11:25 -0400 | [diff] [blame] | 1100 | dout("d_revalidate %p '%pd' inode %p is SNAPPED\n", dentry, |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1101 | dentry, d_inode(dentry)); |
Sage Weil | bf1c6ac | 2011-07-26 11:30:43 -0700 | [diff] [blame] | 1102 | valid = 1; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1103 | } else if (d_really_is_positive(dentry) && |
| 1104 | ceph_snap(d_inode(dentry)) == CEPH_SNAPDIR) { |
Sage Weil | bf1c6ac | 2011-07-26 11:30:43 -0700 | [diff] [blame] | 1105 | valid = 1; |
| 1106 | } else if (dentry_lease_is_valid(dentry) || |
| 1107 | dir_lease_is_valid(dir, dentry)) { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1108 | if (d_really_is_positive(dentry)) |
| 1109 | valid = ceph_is_any_caps(d_inode(dentry)); |
Yan, Zheng | 9215aee | 2013-11-30 12:47:41 +0800 | [diff] [blame] | 1110 | else |
| 1111 | valid = 1; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1112 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1113 | |
Yan, Zheng | 200fd27 | 2016-03-17 14:41:59 +0800 | [diff] [blame] | 1114 | if (!valid) { |
| 1115 | struct ceph_mds_client *mdsc = |
| 1116 | ceph_sb_to_client(dir->i_sb)->mdsc; |
| 1117 | struct ceph_mds_request *req; |
| 1118 | int op, mask, err; |
| 1119 | |
| 1120 | op = ceph_snap(dir) == CEPH_SNAPDIR ? |
| 1121 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; |
| 1122 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); |
| 1123 | if (!IS_ERR(req)) { |
| 1124 | req->r_dentry = dget(dentry); |
| 1125 | req->r_num_caps = 2; |
| 1126 | |
| 1127 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; |
| 1128 | if (ceph_security_xattr_wanted(dir)) |
| 1129 | mask |= CEPH_CAP_XATTR_SHARED; |
| 1130 | req->r_args.getattr.mask = mask; |
| 1131 | |
| 1132 | req->r_locked_dir = dir; |
| 1133 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
| 1134 | if (err == 0 || err == -ENOENT) { |
| 1135 | if (dentry == req->r_dentry) { |
| 1136 | valid = !d_unhashed(dentry); |
| 1137 | } else { |
| 1138 | d_invalidate(req->r_dentry); |
| 1139 | err = -EAGAIN; |
| 1140 | } |
| 1141 | } |
| 1142 | ceph_mdsc_put_request(req); |
| 1143 | dout("d_revalidate %p lookup result=%d\n", |
| 1144 | dentry, err); |
| 1145 | } |
| 1146 | } |
| 1147 | |
Sage Weil | bf1c6ac | 2011-07-26 11:30:43 -0700 | [diff] [blame] | 1148 | dout("d_revalidate %p %s\n", dentry, valid ? "valid" : "invalid"); |
Yan, Zheng | 9215aee | 2013-11-30 12:47:41 +0800 | [diff] [blame] | 1149 | if (valid) { |
Sage Weil | bf1c6ac | 2011-07-26 11:30:43 -0700 | [diff] [blame] | 1150 | ceph_dentry_lru_touch(dentry); |
Yan, Zheng | 9215aee | 2013-11-30 12:47:41 +0800 | [diff] [blame] | 1151 | } else { |
| 1152 | ceph_dir_clear_complete(dir); |
Yan, Zheng | 9215aee | 2013-11-30 12:47:41 +0800 | [diff] [blame] | 1153 | } |
Yan, Zheng | 641235d | 2016-03-16 16:40:23 +0800 | [diff] [blame] | 1154 | |
| 1155 | dput(parent); |
Sage Weil | bf1c6ac | 2011-07-26 11:30:43 -0700 | [diff] [blame] | 1156 | return valid; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1157 | } |
| 1158 | |
| 1159 | /* |
Sage Weil | 147851d | 2011-03-15 14:57:41 -0700 | [diff] [blame] | 1160 | * Release our ceph_dentry_info. |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1161 | */ |
Sage Weil | 147851d | 2011-03-15 14:57:41 -0700 | [diff] [blame] | 1162 | static void ceph_d_release(struct dentry *dentry) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1163 | { |
| 1164 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1165 | |
Sage Weil | 147851d | 2011-03-15 14:57:41 -0700 | [diff] [blame] | 1166 | dout("d_release %p\n", dentry); |
Sage Weil | 3d8eb7a | 2011-11-11 09:48:53 -0800 | [diff] [blame] | 1167 | ceph_dentry_lru_del(dentry); |
| 1168 | if (di->lease_session) |
| 1169 | ceph_put_mds_session(di->lease_session); |
| 1170 | kmem_cache_free(ceph_dentry_cachep, di); |
| 1171 | dentry->d_fsdata = NULL; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1172 | } |
| 1173 | |
| 1174 | static int ceph_snapdir_d_revalidate(struct dentry *dentry, |
Al Viro | 0b728e1 | 2012-06-10 16:03:43 -0400 | [diff] [blame] | 1175 | unsigned int flags) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1176 | { |
| 1177 | /* |
| 1178 | * Eventually, we'll want to revalidate snapped metadata |
| 1179 | * too... probably... |
| 1180 | */ |
| 1181 | return 1; |
| 1182 | } |
| 1183 | |
Sage Weil | b58dc41 | 2011-03-15 15:53:40 -0700 | [diff] [blame] | 1184 | /* |
| 1185 | * When the VFS prunes a dentry from the cache, we need to clear the |
| 1186 | * complete flag on the parent directory. |
| 1187 | * |
| 1188 | * Called under dentry->d_lock. |
| 1189 | */ |
| 1190 | static void ceph_d_prune(struct dentry *dentry) |
| 1191 | { |
Sage Weil | 774ac21 | 2011-11-11 09:48:08 -0800 | [diff] [blame] | 1192 | dout("ceph_d_prune %p\n", dentry); |
Sage Weil | b58dc41 | 2011-03-15 15:53:40 -0700 | [diff] [blame] | 1193 | |
| 1194 | /* do we have a valid parent? */ |
Sage Weil | 8842b3b | 2012-06-07 13:43:35 -0700 | [diff] [blame] | 1195 | if (IS_ROOT(dentry)) |
Sage Weil | b58dc41 | 2011-03-15 15:53:40 -0700 | [diff] [blame] | 1196 | return; |
| 1197 | |
Yan, Zheng | 2f276c5 | 2013-03-13 19:44:32 +0800 | [diff] [blame] | 1198 | /* if we are not hashed, we don't affect dir's completeness */ |
Sage Weil | b58dc41 | 2011-03-15 15:53:40 -0700 | [diff] [blame] | 1199 | if (d_unhashed(dentry)) |
| 1200 | return; |
| 1201 | |
| 1202 | /* |
| 1203 | * we hold d_lock, so d_parent is stable, and d_fsdata is never |
| 1204 | * cleared until d_release |
| 1205 | */ |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1206 | ceph_dir_clear_complete(d_inode(dentry->d_parent)); |
Sage Weil | b58dc41 | 2011-03-15 15:53:40 -0700 | [diff] [blame] | 1207 | } |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1208 | |
| 1209 | /* |
| 1210 | * read() on a dir. This weird interface hack only works if mounted |
| 1211 | * with '-o dirstat'. |
| 1212 | */ |
| 1213 | static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, |
| 1214 | loff_t *ppos) |
| 1215 | { |
| 1216 | struct ceph_file_info *cf = file->private_data; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 1217 | struct inode *inode = file_inode(file); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1218 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 1219 | int left; |
Sage Weil | ae59808 | 2011-05-12 14:28:05 -0700 | [diff] [blame] | 1220 | const int bufsize = 1024; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1221 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1222 | if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT)) |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1223 | return -EISDIR; |
| 1224 | |
| 1225 | if (!cf->dir_info) { |
Yan, Zheng | 687265e | 2015-06-13 17:27:05 +0800 | [diff] [blame] | 1226 | cf->dir_info = kmalloc(bufsize, GFP_KERNEL); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1227 | if (!cf->dir_info) |
| 1228 | return -ENOMEM; |
| 1229 | cf->dir_info_len = |
Sage Weil | ae59808 | 2011-05-12 14:28:05 -0700 | [diff] [blame] | 1230 | snprintf(cf->dir_info, bufsize, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1231 | "entries: %20lld\n" |
| 1232 | " files: %20lld\n" |
| 1233 | " subdirs: %20lld\n" |
| 1234 | "rentries: %20lld\n" |
| 1235 | " rfiles: %20lld\n" |
| 1236 | " rsubdirs: %20lld\n" |
| 1237 | "rbytes: %20lld\n" |
| 1238 | "rctime: %10ld.%09ld\n", |
| 1239 | ci->i_files + ci->i_subdirs, |
| 1240 | ci->i_files, |
| 1241 | ci->i_subdirs, |
| 1242 | ci->i_rfiles + ci->i_rsubdirs, |
| 1243 | ci->i_rfiles, |
| 1244 | ci->i_rsubdirs, |
| 1245 | ci->i_rbytes, |
| 1246 | (long)ci->i_rctime.tv_sec, |
| 1247 | (long)ci->i_rctime.tv_nsec); |
| 1248 | } |
| 1249 | |
| 1250 | if (*ppos >= cf->dir_info_len) |
| 1251 | return 0; |
| 1252 | size = min_t(unsigned, size, cf->dir_info_len-*ppos); |
| 1253 | left = copy_to_user(buf, cf->dir_info + *ppos, size); |
| 1254 | if (left == size) |
| 1255 | return -EFAULT; |
| 1256 | *ppos += (size - left); |
| 1257 | return size - left; |
| 1258 | } |
| 1259 | |
| 1260 | /* |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1261 | * We maintain a private dentry LRU. |
| 1262 | * |
| 1263 | * FIXME: this needs to be changed to a per-mds lru to be useful. |
| 1264 | */ |
| 1265 | void ceph_dentry_lru_add(struct dentry *dn) |
| 1266 | { |
| 1267 | struct ceph_dentry_info *di = ceph_dentry(dn); |
| 1268 | struct ceph_mds_client *mdsc; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1269 | |
Al Viro | a455589 | 2014-10-21 20:11:25 -0400 | [diff] [blame] | 1270 | dout("dentry_lru_add %p %p '%pd'\n", di, dn, dn); |
Sage Weil | 3d8eb7a | 2011-11-11 09:48:53 -0800 | [diff] [blame] | 1271 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
| 1272 | spin_lock(&mdsc->dentry_lru_lock); |
| 1273 | list_add_tail(&di->lru, &mdsc->dentry_lru); |
| 1274 | mdsc->num_dentry++; |
| 1275 | spin_unlock(&mdsc->dentry_lru_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1276 | } |
| 1277 | |
| 1278 | void ceph_dentry_lru_touch(struct dentry *dn) |
| 1279 | { |
| 1280 | struct ceph_dentry_info *di = ceph_dentry(dn); |
| 1281 | struct ceph_mds_client *mdsc; |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1282 | |
Al Viro | a455589 | 2014-10-21 20:11:25 -0400 | [diff] [blame] | 1283 | dout("dentry_lru_touch %p %p '%pd' (offset %lld)\n", di, dn, dn, |
| 1284 | di->offset); |
Sage Weil | 3d8eb7a | 2011-11-11 09:48:53 -0800 | [diff] [blame] | 1285 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
| 1286 | spin_lock(&mdsc->dentry_lru_lock); |
| 1287 | list_move_tail(&di->lru, &mdsc->dentry_lru); |
| 1288 | spin_unlock(&mdsc->dentry_lru_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1289 | } |
| 1290 | |
| 1291 | void ceph_dentry_lru_del(struct dentry *dn) |
| 1292 | { |
| 1293 | struct ceph_dentry_info *di = ceph_dentry(dn); |
| 1294 | struct ceph_mds_client *mdsc; |
| 1295 | |
Al Viro | a455589 | 2014-10-21 20:11:25 -0400 | [diff] [blame] | 1296 | dout("dentry_lru_del %p %p '%pd'\n", di, dn, dn); |
Sage Weil | 3d8eb7a | 2011-11-11 09:48:53 -0800 | [diff] [blame] | 1297 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
| 1298 | spin_lock(&mdsc->dentry_lru_lock); |
| 1299 | list_del_init(&di->lru); |
| 1300 | mdsc->num_dentry--; |
| 1301 | spin_unlock(&mdsc->dentry_lru_lock); |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1302 | } |
| 1303 | |
Sage Weil | 6c0f3af | 2010-11-16 11:14:34 -0800 | [diff] [blame] | 1304 | /* |
| 1305 | * Return name hash for a given dentry. This is dependent on |
| 1306 | * the parent directory's hash function. |
| 1307 | */ |
Sage Weil | e5f86dc | 2011-07-26 11:30:55 -0700 | [diff] [blame] | 1308 | unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn) |
Sage Weil | 6c0f3af | 2010-11-16 11:14:34 -0800 | [diff] [blame] | 1309 | { |
Sage Weil | 6c0f3af | 2010-11-16 11:14:34 -0800 | [diff] [blame] | 1310 | struct ceph_inode_info *dci = ceph_inode(dir); |
| 1311 | |
| 1312 | switch (dci->i_dir_layout.dl_dir_hash) { |
| 1313 | case 0: /* for backward compat */ |
| 1314 | case CEPH_STR_HASH_LINUX: |
| 1315 | return dn->d_name.hash; |
| 1316 | |
| 1317 | default: |
| 1318 | return ceph_str_hash(dci->i_dir_layout.dl_dir_hash, |
| 1319 | dn->d_name.name, dn->d_name.len); |
| 1320 | } |
| 1321 | } |
| 1322 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1323 | const struct file_operations ceph_dir_fops = { |
| 1324 | .read = ceph_read_dir, |
Al Viro | 77acfa2 | 2013-05-17 16:52:26 -0400 | [diff] [blame] | 1325 | .iterate = ceph_readdir, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1326 | .llseek = ceph_dir_llseek, |
| 1327 | .open = ceph_open, |
| 1328 | .release = ceph_release, |
| 1329 | .unlocked_ioctl = ceph_ioctl, |
Yan, Zheng | da819c8 | 2015-05-27 11:19:34 +0800 | [diff] [blame] | 1330 | .fsync = ceph_fsync, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1331 | }; |
| 1332 | |
Yan, Zheng | 38c48b5 | 2015-01-14 13:46:04 +0800 | [diff] [blame] | 1333 | const struct file_operations ceph_snapdir_fops = { |
| 1334 | .iterate = ceph_readdir, |
| 1335 | .llseek = ceph_dir_llseek, |
| 1336 | .open = ceph_open, |
| 1337 | .release = ceph_release, |
| 1338 | }; |
| 1339 | |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1340 | const struct inode_operations ceph_dir_iops = { |
| 1341 | .lookup = ceph_lookup, |
| 1342 | .permission = ceph_permission, |
| 1343 | .getattr = ceph_getattr, |
| 1344 | .setattr = ceph_setattr, |
| 1345 | .setxattr = ceph_setxattr, |
| 1346 | .getxattr = ceph_getxattr, |
| 1347 | .listxattr = ceph_listxattr, |
| 1348 | .removexattr = ceph_removexattr, |
Guangliang Zhao | 7221fe4 | 2013-11-11 15:18:03 +0800 | [diff] [blame] | 1349 | .get_acl = ceph_get_acl, |
Sage Weil | 72466d0 | 2014-01-29 06:22:25 -0800 | [diff] [blame] | 1350 | .set_acl = ceph_set_acl, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1351 | .mknod = ceph_mknod, |
| 1352 | .symlink = ceph_symlink, |
| 1353 | .mkdir = ceph_mkdir, |
| 1354 | .link = ceph_link, |
| 1355 | .unlink = ceph_unlink, |
| 1356 | .rmdir = ceph_unlink, |
| 1357 | .rename = ceph_rename, |
| 1358 | .create = ceph_create, |
Miklos Szeredi | 2d83bde | 2012-06-05 15:10:25 +0200 | [diff] [blame] | 1359 | .atomic_open = ceph_atomic_open, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1360 | }; |
| 1361 | |
Yan, Zheng | 38c48b5 | 2015-01-14 13:46:04 +0800 | [diff] [blame] | 1362 | const struct inode_operations ceph_snapdir_iops = { |
| 1363 | .lookup = ceph_lookup, |
| 1364 | .permission = ceph_permission, |
| 1365 | .getattr = ceph_getattr, |
| 1366 | .mkdir = ceph_mkdir, |
| 1367 | .rmdir = ceph_unlink, |
Yan, Zheng | 0ea611a | 2015-04-07 15:36:32 +0800 | [diff] [blame] | 1368 | .rename = ceph_rename, |
Yan, Zheng | 38c48b5 | 2015-01-14 13:46:04 +0800 | [diff] [blame] | 1369 | }; |
| 1370 | |
Sage Weil | 52dfb8a | 2010-08-03 10:25:30 -0700 | [diff] [blame] | 1371 | const struct dentry_operations ceph_dentry_ops = { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1372 | .d_revalidate = ceph_d_revalidate, |
Sage Weil | 147851d | 2011-03-15 14:57:41 -0700 | [diff] [blame] | 1373 | .d_release = ceph_d_release, |
Sage Weil | b58dc41 | 2011-03-15 15:53:40 -0700 | [diff] [blame] | 1374 | .d_prune = ceph_d_prune, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1375 | }; |
| 1376 | |
Sage Weil | 52dfb8a | 2010-08-03 10:25:30 -0700 | [diff] [blame] | 1377 | const struct dentry_operations ceph_snapdir_dentry_ops = { |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1378 | .d_revalidate = ceph_snapdir_d_revalidate, |
Sage Weil | 147851d | 2011-03-15 14:57:41 -0700 | [diff] [blame] | 1379 | .d_release = ceph_d_release, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1380 | }; |
| 1381 | |
Sage Weil | 52dfb8a | 2010-08-03 10:25:30 -0700 | [diff] [blame] | 1382 | const struct dentry_operations ceph_snap_dentry_ops = { |
Sage Weil | 147851d | 2011-03-15 14:57:41 -0700 | [diff] [blame] | 1383 | .d_release = ceph_d_release, |
Sage Weil | b58dc41 | 2011-03-15 15:53:40 -0700 | [diff] [blame] | 1384 | .d_prune = ceph_d_prune, |
Sage Weil | 2817b00 | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1385 | }; |