Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 1 | /* |
| 2 | FUSE: Filesystem in Userspace |
| 3 | Copyright (C) 2001-2005 Miklos Szeredi <miklos@szeredi.hu> |
| 4 | |
| 5 | This program can be distributed under the terms of the GNU GPL. |
| 6 | See the file COPYING. |
| 7 | */ |
| 8 | |
| 9 | #include "fuse_i.h" |
| 10 | |
| 11 | #include <linux/pagemap.h> |
| 12 | #include <linux/file.h> |
| 13 | #include <linux/gfp.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/namei.h> |
| 16 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 17 | /* |
| 18 | * FUSE caches dentries and attributes with separate timeout. The |
| 19 | * time in jiffies until the dentry/attributes are valid is stored in |
| 20 | * dentry->d_time and fuse_inode->i_time respectively. |
| 21 | */ |
| 22 | |
| 23 | /* |
| 24 | * Calculate the time in jiffies until a dentry/attributes are valid |
| 25 | */ |
Miklos Szeredi | 8bfc016 | 2006-01-16 22:14:28 -0800 | [diff] [blame] | 26 | static unsigned long time_to_jiffies(unsigned long sec, unsigned long nsec) |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 27 | { |
| 28 | struct timespec ts = {sec, nsec}; |
| 29 | return jiffies + timespec_to_jiffies(&ts); |
| 30 | } |
| 31 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 32 | /* |
| 33 | * Set dentry and possibly attribute timeouts from the lookup/mk* |
| 34 | * replies |
| 35 | */ |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 36 | static void fuse_change_timeout(struct dentry *entry, struct fuse_entry_out *o) |
| 37 | { |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 38 | entry->d_time = time_to_jiffies(o->entry_valid, o->entry_valid_nsec); |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 39 | if (entry->d_inode) |
| 40 | get_fuse_inode(entry->d_inode)->i_time = |
| 41 | time_to_jiffies(o->attr_valid, o->attr_valid_nsec); |
| 42 | } |
| 43 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 44 | /* |
| 45 | * Mark the attributes as stale, so that at the next call to |
| 46 | * ->getattr() they will be fetched from userspace |
| 47 | */ |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 48 | void fuse_invalidate_attr(struct inode *inode) |
| 49 | { |
| 50 | get_fuse_inode(inode)->i_time = jiffies - 1; |
| 51 | } |
| 52 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 53 | /* |
| 54 | * Just mark the entry as stale, so that a next attempt to look it up |
| 55 | * will result in a new lookup call to userspace |
| 56 | * |
| 57 | * This is called when a dentry is about to become negative and the |
| 58 | * timeout is unknown (unlink, rmdir, rename and in some cases |
| 59 | * lookup) |
| 60 | */ |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 61 | static void fuse_invalidate_entry_cache(struct dentry *entry) |
| 62 | { |
| 63 | entry->d_time = jiffies - 1; |
| 64 | } |
| 65 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 66 | /* |
| 67 | * Same as fuse_invalidate_entry_cache(), but also try to remove the |
| 68 | * dentry from the hash |
| 69 | */ |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 70 | static void fuse_invalidate_entry(struct dentry *entry) |
| 71 | { |
| 72 | d_invalidate(entry); |
| 73 | fuse_invalidate_entry_cache(entry); |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 74 | } |
| 75 | |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 76 | static void fuse_lookup_init(struct fuse_req *req, struct inode *dir, |
| 77 | struct dentry *entry, |
| 78 | struct fuse_entry_out *outarg) |
| 79 | { |
| 80 | req->in.h.opcode = FUSE_LOOKUP; |
| 81 | req->in.h.nodeid = get_node_id(dir); |
| 82 | req->inode = dir; |
| 83 | req->in.numargs = 1; |
| 84 | req->in.args[0].size = entry->d_name.len + 1; |
| 85 | req->in.args[0].value = entry->d_name.name; |
| 86 | req->out.numargs = 1; |
| 87 | req->out.args[0].size = sizeof(struct fuse_entry_out); |
| 88 | req->out.args[0].value = outarg; |
| 89 | } |
| 90 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 91 | /* |
| 92 | * Check whether the dentry is still valid |
| 93 | * |
| 94 | * If the entry validity timeout has expired and the dentry is |
| 95 | * positive, try to redo the lookup. If the lookup results in a |
| 96 | * different inode, then let the VFS invalidate the dentry and redo |
| 97 | * the lookup once more. If the lookup results in the same inode, |
| 98 | * then refresh the attributes, timeouts and mark the dentry valid. |
| 99 | */ |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 100 | static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) |
| 101 | { |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 102 | struct inode *inode = entry->d_inode; |
| 103 | |
| 104 | if (inode && is_bad_inode(inode)) |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 105 | return 0; |
| 106 | else if (time_after(jiffies, entry->d_time)) { |
| 107 | int err; |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 108 | struct fuse_entry_out outarg; |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 109 | struct fuse_conn *fc; |
| 110 | struct fuse_req *req; |
| 111 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 112 | /* Doesn't hurt to "reset" the validity timeout */ |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 113 | fuse_invalidate_entry_cache(entry); |
Miklos Szeredi | 50322fe | 2006-02-28 16:59:03 -0800 | [diff] [blame] | 114 | |
| 115 | /* For negative dentries, always do a fresh lookup */ |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 116 | if (!inode) |
| 117 | return 0; |
| 118 | |
| 119 | fc = get_fuse_conn(inode); |
| 120 | req = fuse_get_request(fc); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 121 | if (!req) |
| 122 | return 0; |
| 123 | |
| 124 | fuse_lookup_init(req, entry->d_parent->d_inode, entry, &outarg); |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 125 | request_send(fc, req); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 126 | err = req->out.h.error; |
Miklos Szeredi | 50322fe | 2006-02-28 16:59:03 -0800 | [diff] [blame] | 127 | /* Zero nodeid is same as -ENOENT */ |
| 128 | if (!err && !outarg.nodeid) |
| 129 | err = -ENOENT; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 130 | if (!err) { |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 131 | struct fuse_inode *fi = get_fuse_inode(inode); |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 132 | if (outarg.nodeid != get_node_id(inode)) { |
| 133 | fuse_send_forget(fc, req, outarg.nodeid, 1); |
| 134 | return 0; |
| 135 | } |
| 136 | fi->nlookup ++; |
| 137 | } |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 138 | fuse_put_request(fc, req); |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 139 | if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT) |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 140 | return 0; |
| 141 | |
| 142 | fuse_change_attributes(inode, &outarg.attr); |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 143 | fuse_change_timeout(entry, &outarg); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 144 | } |
| 145 | return 1; |
| 146 | } |
| 147 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 148 | /* |
| 149 | * Check if there's already a hashed alias of this directory inode. |
| 150 | * If yes, then lookup and mkdir must not create a new alias. |
| 151 | */ |
Miklos Szeredi | f007d5c | 2005-11-28 13:44:16 -0800 | [diff] [blame] | 152 | static int dir_alias(struct inode *inode) |
| 153 | { |
| 154 | if (S_ISDIR(inode->i_mode)) { |
Miklos Szeredi | f007d5c | 2005-11-28 13:44:16 -0800 | [diff] [blame] | 155 | struct dentry *alias = d_find_alias(inode); |
| 156 | if (alias) { |
| 157 | dput(alias); |
| 158 | return 1; |
| 159 | } |
| 160 | } |
| 161 | return 0; |
| 162 | } |
| 163 | |
Miklos Szeredi | 8bfc016 | 2006-01-16 22:14:28 -0800 | [diff] [blame] | 164 | static int invalid_nodeid(u64 nodeid) |
Miklos Szeredi | 2827d0b2 | 2005-11-28 13:44:16 -0800 | [diff] [blame] | 165 | { |
| 166 | return !nodeid || nodeid == FUSE_ROOT_ID; |
| 167 | } |
| 168 | |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 169 | static struct dentry_operations fuse_dentry_operations = { |
| 170 | .d_revalidate = fuse_dentry_revalidate, |
| 171 | }; |
| 172 | |
Miklos Szeredi | 8bfc016 | 2006-01-16 22:14:28 -0800 | [diff] [blame] | 173 | static int valid_mode(int m) |
Miklos Szeredi | 39ee059 | 2006-01-06 00:19:43 -0800 | [diff] [blame] | 174 | { |
| 175 | return S_ISREG(m) || S_ISDIR(m) || S_ISLNK(m) || S_ISCHR(m) || |
| 176 | S_ISBLK(m) || S_ISFIFO(m) || S_ISSOCK(m); |
| 177 | } |
| 178 | |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 179 | static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, |
| 180 | struct nameidata *nd) |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 181 | { |
| 182 | int err; |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 183 | struct fuse_entry_out outarg; |
| 184 | struct inode *inode = NULL; |
| 185 | struct fuse_conn *fc = get_fuse_conn(dir); |
| 186 | struct fuse_req *req; |
| 187 | |
| 188 | if (entry->d_name.len > FUSE_NAME_MAX) |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 189 | return ERR_PTR(-ENAMETOOLONG); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 190 | |
| 191 | req = fuse_get_request(fc); |
| 192 | if (!req) |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 193 | return ERR_PTR(-EINTR); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 194 | |
| 195 | fuse_lookup_init(req, dir, entry, &outarg); |
| 196 | request_send(fc, req); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 197 | err = req->out.h.error; |
Miklos Szeredi | 50322fe | 2006-02-28 16:59:03 -0800 | [diff] [blame] | 198 | /* Zero nodeid is same as -ENOENT, but with valid timeout */ |
| 199 | if (!err && outarg.nodeid && |
| 200 | (invalid_nodeid(outarg.nodeid) || !valid_mode(outarg.attr.mode))) |
Miklos Szeredi | ee4e527 | 2005-09-27 21:45:21 -0700 | [diff] [blame] | 201 | err = -EIO; |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 202 | if (!err && outarg.nodeid) { |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 203 | inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 204 | &outarg.attr); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 205 | if (!inode) { |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 206 | fuse_send_forget(fc, req, outarg.nodeid, 1); |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 207 | return ERR_PTR(-ENOMEM); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 208 | } |
| 209 | } |
| 210 | fuse_put_request(fc, req); |
| 211 | if (err && err != -ENOENT) |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 212 | return ERR_PTR(err); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 213 | |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 214 | if (inode && dir_alias(inode)) { |
| 215 | iput(inode); |
| 216 | return ERR_PTR(-EIO); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 217 | } |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 218 | d_add(entry, inode); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 219 | entry->d_op = &fuse_dentry_operations; |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 220 | if (!err) |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 221 | fuse_change_timeout(entry, &outarg); |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 222 | else |
| 223 | fuse_invalidate_entry_cache(entry); |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 224 | return NULL; |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 225 | } |
| 226 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 227 | /* |
| 228 | * Atomic create+open operation |
| 229 | * |
| 230 | * If the filesystem doesn't support this, then fall back to separate |
| 231 | * 'mknod' + 'open' requests. |
| 232 | */ |
Miklos Szeredi | fd72faa | 2005-11-07 00:59:51 -0800 | [diff] [blame] | 233 | static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode, |
| 234 | struct nameidata *nd) |
| 235 | { |
| 236 | int err; |
| 237 | struct inode *inode; |
| 238 | struct fuse_conn *fc = get_fuse_conn(dir); |
| 239 | struct fuse_req *req; |
| 240 | struct fuse_open_in inarg; |
| 241 | struct fuse_open_out outopen; |
| 242 | struct fuse_entry_out outentry; |
Miklos Szeredi | fd72faa | 2005-11-07 00:59:51 -0800 | [diff] [blame] | 243 | struct fuse_file *ff; |
| 244 | struct file *file; |
| 245 | int flags = nd->intent.open.flags - 1; |
| 246 | |
| 247 | err = -ENOSYS; |
| 248 | if (fc->no_create) |
| 249 | goto out; |
| 250 | |
Miklos Szeredi | fd72faa | 2005-11-07 00:59:51 -0800 | [diff] [blame] | 251 | err = -EINTR; |
| 252 | req = fuse_get_request(fc); |
| 253 | if (!req) |
| 254 | goto out; |
| 255 | |
| 256 | ff = fuse_file_alloc(); |
| 257 | if (!ff) |
| 258 | goto out_put_request; |
| 259 | |
| 260 | flags &= ~O_NOCTTY; |
| 261 | memset(&inarg, 0, sizeof(inarg)); |
| 262 | inarg.flags = flags; |
| 263 | inarg.mode = mode; |
| 264 | req->in.h.opcode = FUSE_CREATE; |
| 265 | req->in.h.nodeid = get_node_id(dir); |
| 266 | req->inode = dir; |
| 267 | req->in.numargs = 2; |
| 268 | req->in.args[0].size = sizeof(inarg); |
| 269 | req->in.args[0].value = &inarg; |
| 270 | req->in.args[1].size = entry->d_name.len + 1; |
| 271 | req->in.args[1].value = entry->d_name.name; |
| 272 | req->out.numargs = 2; |
| 273 | req->out.args[0].size = sizeof(outentry); |
| 274 | req->out.args[0].value = &outentry; |
| 275 | req->out.args[1].size = sizeof(outopen); |
| 276 | req->out.args[1].value = &outopen; |
| 277 | request_send(fc, req); |
| 278 | err = req->out.h.error; |
| 279 | if (err) { |
| 280 | if (err == -ENOSYS) |
| 281 | fc->no_create = 1; |
| 282 | goto out_free_ff; |
| 283 | } |
| 284 | |
| 285 | err = -EIO; |
Miklos Szeredi | 2827d0b2 | 2005-11-28 13:44:16 -0800 | [diff] [blame] | 286 | if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid)) |
Miklos Szeredi | fd72faa | 2005-11-07 00:59:51 -0800 | [diff] [blame] | 287 | goto out_free_ff; |
| 288 | |
| 289 | inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation, |
| 290 | &outentry.attr); |
| 291 | err = -ENOMEM; |
| 292 | if (!inode) { |
| 293 | flags &= ~(O_CREAT | O_EXCL | O_TRUNC); |
| 294 | ff->fh = outopen.fh; |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 295 | /* Special release, with inode = NULL, this will |
| 296 | trigger a 'forget' request when the release is |
| 297 | complete */ |
Miklos Szeredi | fd72faa | 2005-11-07 00:59:51 -0800 | [diff] [blame] | 298 | fuse_send_release(fc, ff, outentry.nodeid, NULL, flags, 0); |
| 299 | goto out_put_request; |
| 300 | } |
| 301 | fuse_put_request(fc, req); |
Miklos Szeredi | fd72faa | 2005-11-07 00:59:51 -0800 | [diff] [blame] | 302 | d_instantiate(entry, inode); |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 303 | fuse_change_timeout(entry, &outentry); |
Miklos Szeredi | fd72faa | 2005-11-07 00:59:51 -0800 | [diff] [blame] | 304 | file = lookup_instantiate_filp(nd, entry, generic_file_open); |
| 305 | if (IS_ERR(file)) { |
| 306 | ff->fh = outopen.fh; |
| 307 | fuse_send_release(fc, ff, outentry.nodeid, inode, flags, 0); |
| 308 | return PTR_ERR(file); |
| 309 | } |
| 310 | fuse_finish_open(inode, file, ff, &outopen); |
| 311 | return 0; |
| 312 | |
| 313 | out_free_ff: |
| 314 | fuse_file_free(ff); |
| 315 | out_put_request: |
| 316 | fuse_put_request(fc, req); |
| 317 | out: |
| 318 | return err; |
| 319 | } |
| 320 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 321 | /* |
| 322 | * Code shared between mknod, mkdir, symlink and link |
| 323 | */ |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 324 | static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req, |
| 325 | struct inode *dir, struct dentry *entry, |
| 326 | int mode) |
| 327 | { |
| 328 | struct fuse_entry_out outarg; |
| 329 | struct inode *inode; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 330 | int err; |
| 331 | |
| 332 | req->in.h.nodeid = get_node_id(dir); |
| 333 | req->inode = dir; |
| 334 | req->out.numargs = 1; |
| 335 | req->out.args[0].size = sizeof(outarg); |
| 336 | req->out.args[0].value = &outarg; |
| 337 | request_send(fc, req); |
| 338 | err = req->out.h.error; |
| 339 | if (err) { |
| 340 | fuse_put_request(fc, req); |
| 341 | return err; |
| 342 | } |
Miklos Szeredi | 39ee059 | 2006-01-06 00:19:43 -0800 | [diff] [blame] | 343 | err = -EIO; |
| 344 | if (invalid_nodeid(outarg.nodeid)) |
| 345 | goto out_put_request; |
| 346 | |
| 347 | if ((outarg.attr.mode ^ mode) & S_IFMT) |
| 348 | goto out_put_request; |
| 349 | |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 350 | inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, |
| 351 | &outarg.attr); |
| 352 | if (!inode) { |
| 353 | fuse_send_forget(fc, req, outarg.nodeid, 1); |
| 354 | return -ENOMEM; |
| 355 | } |
| 356 | fuse_put_request(fc, req); |
| 357 | |
Miklos Szeredi | 39ee059 | 2006-01-06 00:19:43 -0800 | [diff] [blame] | 358 | if (dir_alias(inode)) { |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 359 | iput(inode); |
| 360 | return -EIO; |
| 361 | } |
| 362 | |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 363 | d_instantiate(entry, inode); |
Miklos Szeredi | 0aa7c69 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 364 | fuse_change_timeout(entry, &outarg); |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 365 | fuse_invalidate_attr(dir); |
| 366 | return 0; |
Miklos Szeredi | 39ee059 | 2006-01-06 00:19:43 -0800 | [diff] [blame] | 367 | |
| 368 | out_put_request: |
| 369 | fuse_put_request(fc, req); |
| 370 | return err; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 371 | } |
| 372 | |
| 373 | static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode, |
| 374 | dev_t rdev) |
| 375 | { |
| 376 | struct fuse_mknod_in inarg; |
| 377 | struct fuse_conn *fc = get_fuse_conn(dir); |
| 378 | struct fuse_req *req = fuse_get_request(fc); |
| 379 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 380 | return -EINTR; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 381 | |
| 382 | memset(&inarg, 0, sizeof(inarg)); |
| 383 | inarg.mode = mode; |
| 384 | inarg.rdev = new_encode_dev(rdev); |
| 385 | req->in.h.opcode = FUSE_MKNOD; |
| 386 | req->in.numargs = 2; |
| 387 | req->in.args[0].size = sizeof(inarg); |
| 388 | req->in.args[0].value = &inarg; |
| 389 | req->in.args[1].size = entry->d_name.len + 1; |
| 390 | req->in.args[1].value = entry->d_name.name; |
| 391 | return create_new_entry(fc, req, dir, entry, mode); |
| 392 | } |
| 393 | |
| 394 | static int fuse_create(struct inode *dir, struct dentry *entry, int mode, |
| 395 | struct nameidata *nd) |
| 396 | { |
Miklos Szeredi | fd72faa | 2005-11-07 00:59:51 -0800 | [diff] [blame] | 397 | if (nd && (nd->flags & LOOKUP_CREATE)) { |
| 398 | int err = fuse_create_open(dir, entry, mode, nd); |
| 399 | if (err != -ENOSYS) |
| 400 | return err; |
| 401 | /* Fall back on mknod */ |
| 402 | } |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 403 | return fuse_mknod(dir, entry, mode, 0); |
| 404 | } |
| 405 | |
| 406 | static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode) |
| 407 | { |
| 408 | struct fuse_mkdir_in inarg; |
| 409 | struct fuse_conn *fc = get_fuse_conn(dir); |
| 410 | struct fuse_req *req = fuse_get_request(fc); |
| 411 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 412 | return -EINTR; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 413 | |
| 414 | memset(&inarg, 0, sizeof(inarg)); |
| 415 | inarg.mode = mode; |
| 416 | req->in.h.opcode = FUSE_MKDIR; |
| 417 | req->in.numargs = 2; |
| 418 | req->in.args[0].size = sizeof(inarg); |
| 419 | req->in.args[0].value = &inarg; |
| 420 | req->in.args[1].size = entry->d_name.len + 1; |
| 421 | req->in.args[1].value = entry->d_name.name; |
| 422 | return create_new_entry(fc, req, dir, entry, S_IFDIR); |
| 423 | } |
| 424 | |
| 425 | static int fuse_symlink(struct inode *dir, struct dentry *entry, |
| 426 | const char *link) |
| 427 | { |
| 428 | struct fuse_conn *fc = get_fuse_conn(dir); |
| 429 | unsigned len = strlen(link) + 1; |
Miklos Szeredi | 1d3d752 | 2006-01-06 00:19:40 -0800 | [diff] [blame] | 430 | struct fuse_req *req = fuse_get_request(fc); |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 431 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 432 | return -EINTR; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 433 | |
| 434 | req->in.h.opcode = FUSE_SYMLINK; |
| 435 | req->in.numargs = 2; |
| 436 | req->in.args[0].size = entry->d_name.len + 1; |
| 437 | req->in.args[0].value = entry->d_name.name; |
| 438 | req->in.args[1].size = len; |
| 439 | req->in.args[1].value = link; |
| 440 | return create_new_entry(fc, req, dir, entry, S_IFLNK); |
| 441 | } |
| 442 | |
| 443 | static int fuse_unlink(struct inode *dir, struct dentry *entry) |
| 444 | { |
| 445 | int err; |
| 446 | struct fuse_conn *fc = get_fuse_conn(dir); |
| 447 | struct fuse_req *req = fuse_get_request(fc); |
| 448 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 449 | return -EINTR; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 450 | |
| 451 | req->in.h.opcode = FUSE_UNLINK; |
| 452 | req->in.h.nodeid = get_node_id(dir); |
| 453 | req->inode = dir; |
| 454 | req->in.numargs = 1; |
| 455 | req->in.args[0].size = entry->d_name.len + 1; |
| 456 | req->in.args[0].value = entry->d_name.name; |
| 457 | request_send(fc, req); |
| 458 | err = req->out.h.error; |
| 459 | fuse_put_request(fc, req); |
| 460 | if (!err) { |
| 461 | struct inode *inode = entry->d_inode; |
| 462 | |
| 463 | /* Set nlink to zero so the inode can be cleared, if |
| 464 | the inode does have more links this will be |
| 465 | discovered at the next lookup/getattr */ |
| 466 | inode->i_nlink = 0; |
| 467 | fuse_invalidate_attr(inode); |
| 468 | fuse_invalidate_attr(dir); |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 469 | fuse_invalidate_entry_cache(entry); |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 470 | } else if (err == -EINTR) |
| 471 | fuse_invalidate_entry(entry); |
| 472 | return err; |
| 473 | } |
| 474 | |
| 475 | static int fuse_rmdir(struct inode *dir, struct dentry *entry) |
| 476 | { |
| 477 | int err; |
| 478 | struct fuse_conn *fc = get_fuse_conn(dir); |
| 479 | struct fuse_req *req = fuse_get_request(fc); |
| 480 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 481 | return -EINTR; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 482 | |
| 483 | req->in.h.opcode = FUSE_RMDIR; |
| 484 | req->in.h.nodeid = get_node_id(dir); |
| 485 | req->inode = dir; |
| 486 | req->in.numargs = 1; |
| 487 | req->in.args[0].size = entry->d_name.len + 1; |
| 488 | req->in.args[0].value = entry->d_name.name; |
| 489 | request_send(fc, req); |
| 490 | err = req->out.h.error; |
| 491 | fuse_put_request(fc, req); |
| 492 | if (!err) { |
| 493 | entry->d_inode->i_nlink = 0; |
| 494 | fuse_invalidate_attr(dir); |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 495 | fuse_invalidate_entry_cache(entry); |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 496 | } else if (err == -EINTR) |
| 497 | fuse_invalidate_entry(entry); |
| 498 | return err; |
| 499 | } |
| 500 | |
| 501 | static int fuse_rename(struct inode *olddir, struct dentry *oldent, |
| 502 | struct inode *newdir, struct dentry *newent) |
| 503 | { |
| 504 | int err; |
| 505 | struct fuse_rename_in inarg; |
| 506 | struct fuse_conn *fc = get_fuse_conn(olddir); |
| 507 | struct fuse_req *req = fuse_get_request(fc); |
| 508 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 509 | return -EINTR; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 510 | |
| 511 | memset(&inarg, 0, sizeof(inarg)); |
| 512 | inarg.newdir = get_node_id(newdir); |
| 513 | req->in.h.opcode = FUSE_RENAME; |
| 514 | req->in.h.nodeid = get_node_id(olddir); |
| 515 | req->inode = olddir; |
| 516 | req->inode2 = newdir; |
| 517 | req->in.numargs = 3; |
| 518 | req->in.args[0].size = sizeof(inarg); |
| 519 | req->in.args[0].value = &inarg; |
| 520 | req->in.args[1].size = oldent->d_name.len + 1; |
| 521 | req->in.args[1].value = oldent->d_name.name; |
| 522 | req->in.args[2].size = newent->d_name.len + 1; |
| 523 | req->in.args[2].value = newent->d_name.name; |
| 524 | request_send(fc, req); |
| 525 | err = req->out.h.error; |
| 526 | fuse_put_request(fc, req); |
| 527 | if (!err) { |
| 528 | fuse_invalidate_attr(olddir); |
| 529 | if (olddir != newdir) |
| 530 | fuse_invalidate_attr(newdir); |
Miklos Szeredi | 8cbdf1e | 2006-01-06 00:19:38 -0800 | [diff] [blame] | 531 | |
| 532 | /* newent will end up negative */ |
| 533 | if (newent->d_inode) |
| 534 | fuse_invalidate_entry_cache(newent); |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 535 | } else if (err == -EINTR) { |
| 536 | /* If request was interrupted, DEITY only knows if the |
| 537 | rename actually took place. If the invalidation |
| 538 | fails (e.g. some process has CWD under the renamed |
| 539 | directory), then there can be inconsistency between |
| 540 | the dcache and the real filesystem. Tough luck. */ |
| 541 | fuse_invalidate_entry(oldent); |
| 542 | if (newent->d_inode) |
| 543 | fuse_invalidate_entry(newent); |
| 544 | } |
| 545 | |
| 546 | return err; |
| 547 | } |
| 548 | |
| 549 | static int fuse_link(struct dentry *entry, struct inode *newdir, |
| 550 | struct dentry *newent) |
| 551 | { |
| 552 | int err; |
| 553 | struct fuse_link_in inarg; |
| 554 | struct inode *inode = entry->d_inode; |
| 555 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 556 | struct fuse_req *req = fuse_get_request(fc); |
| 557 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 558 | return -EINTR; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 559 | |
| 560 | memset(&inarg, 0, sizeof(inarg)); |
| 561 | inarg.oldnodeid = get_node_id(inode); |
| 562 | req->in.h.opcode = FUSE_LINK; |
| 563 | req->inode2 = inode; |
| 564 | req->in.numargs = 2; |
| 565 | req->in.args[0].size = sizeof(inarg); |
| 566 | req->in.args[0].value = &inarg; |
| 567 | req->in.args[1].size = newent->d_name.len + 1; |
| 568 | req->in.args[1].value = newent->d_name.name; |
| 569 | err = create_new_entry(fc, req, newdir, newent, inode->i_mode); |
| 570 | /* Contrary to "normal" filesystems it can happen that link |
| 571 | makes two "logical" inodes point to the same "physical" |
| 572 | inode. We invalidate the attributes of the old one, so it |
| 573 | will reflect changes in the backing inode (link count, |
| 574 | etc.) |
| 575 | */ |
| 576 | if (!err || err == -EINTR) |
| 577 | fuse_invalidate_attr(inode); |
| 578 | return err; |
| 579 | } |
| 580 | |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 581 | int fuse_do_getattr(struct inode *inode) |
| 582 | { |
| 583 | int err; |
| 584 | struct fuse_attr_out arg; |
| 585 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 586 | struct fuse_req *req = fuse_get_request(fc); |
| 587 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 588 | return -EINTR; |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 589 | |
| 590 | req->in.h.opcode = FUSE_GETATTR; |
| 591 | req->in.h.nodeid = get_node_id(inode); |
| 592 | req->inode = inode; |
| 593 | req->out.numargs = 1; |
| 594 | req->out.args[0].size = sizeof(arg); |
| 595 | req->out.args[0].value = &arg; |
| 596 | request_send(fc, req); |
| 597 | err = req->out.h.error; |
| 598 | fuse_put_request(fc, req); |
| 599 | if (!err) { |
| 600 | if ((inode->i_mode ^ arg.attr.mode) & S_IFMT) { |
| 601 | make_bad_inode(inode); |
| 602 | err = -EIO; |
| 603 | } else { |
| 604 | struct fuse_inode *fi = get_fuse_inode(inode); |
| 605 | fuse_change_attributes(inode, &arg.attr); |
| 606 | fi->i_time = time_to_jiffies(arg.attr_valid, |
| 607 | arg.attr_valid_nsec); |
| 608 | } |
| 609 | } |
| 610 | return err; |
| 611 | } |
| 612 | |
Miklos Szeredi | 87729a5 | 2005-09-09 13:10:34 -0700 | [diff] [blame] | 613 | /* |
| 614 | * Calling into a user-controlled filesystem gives the filesystem |
| 615 | * daemon ptrace-like capabilities over the requester process. This |
| 616 | * means, that the filesystem daemon is able to record the exact |
| 617 | * filesystem operations performed, and can also control the behavior |
| 618 | * of the requester process in otherwise impossible ways. For example |
| 619 | * it can delay the operation for arbitrary length of time allowing |
| 620 | * DoS against the requester. |
| 621 | * |
| 622 | * For this reason only those processes can call into the filesystem, |
| 623 | * for which the owner of the mount has ptrace privilege. This |
| 624 | * excludes processes started by other users, suid or sgid processes. |
| 625 | */ |
| 626 | static int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task) |
| 627 | { |
| 628 | if (fc->flags & FUSE_ALLOW_OTHER) |
| 629 | return 1; |
| 630 | |
| 631 | if (task->euid == fc->user_id && |
| 632 | task->suid == fc->user_id && |
| 633 | task->uid == fc->user_id && |
| 634 | task->egid == fc->group_id && |
| 635 | task->sgid == fc->group_id && |
| 636 | task->gid == fc->group_id) |
| 637 | return 1; |
| 638 | |
| 639 | return 0; |
| 640 | } |
| 641 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 642 | /* |
| 643 | * Check whether the inode attributes are still valid |
| 644 | * |
| 645 | * If the attribute validity timeout has expired, then fetch the fresh |
| 646 | * attributes with a 'getattr' request |
| 647 | * |
| 648 | * I'm not sure why cached attributes are never returned for the root |
| 649 | * inode, this is probably being too cautious. |
| 650 | */ |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 651 | static int fuse_revalidate(struct dentry *entry) |
| 652 | { |
| 653 | struct inode *inode = entry->d_inode; |
| 654 | struct fuse_inode *fi = get_fuse_inode(inode); |
| 655 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 656 | |
Miklos Szeredi | 87729a5 | 2005-09-09 13:10:34 -0700 | [diff] [blame] | 657 | if (!fuse_allow_task(fc, current)) |
| 658 | return -EACCES; |
| 659 | if (get_node_id(inode) != FUSE_ROOT_ID && |
| 660 | time_before_eq(jiffies, fi->i_time)) |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 661 | return 0; |
| 662 | |
| 663 | return fuse_do_getattr(inode); |
| 664 | } |
| 665 | |
Miklos Szeredi | 31d40d7 | 2005-11-07 00:59:50 -0800 | [diff] [blame] | 666 | static int fuse_access(struct inode *inode, int mask) |
| 667 | { |
| 668 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 669 | struct fuse_req *req; |
| 670 | struct fuse_access_in inarg; |
| 671 | int err; |
| 672 | |
| 673 | if (fc->no_access) |
| 674 | return 0; |
| 675 | |
| 676 | req = fuse_get_request(fc); |
| 677 | if (!req) |
| 678 | return -EINTR; |
| 679 | |
| 680 | memset(&inarg, 0, sizeof(inarg)); |
| 681 | inarg.mask = mask; |
| 682 | req->in.h.opcode = FUSE_ACCESS; |
| 683 | req->in.h.nodeid = get_node_id(inode); |
| 684 | req->inode = inode; |
| 685 | req->in.numargs = 1; |
| 686 | req->in.args[0].size = sizeof(inarg); |
| 687 | req->in.args[0].value = &inarg; |
| 688 | request_send(fc, req); |
| 689 | err = req->out.h.error; |
| 690 | fuse_put_request(fc, req); |
| 691 | if (err == -ENOSYS) { |
| 692 | fc->no_access = 1; |
| 693 | err = 0; |
| 694 | } |
| 695 | return err; |
| 696 | } |
| 697 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 698 | /* |
| 699 | * Check permission. The two basic access models of FUSE are: |
| 700 | * |
| 701 | * 1) Local access checking ('default_permissions' mount option) based |
| 702 | * on file mode. This is the plain old disk filesystem permission |
| 703 | * modell. |
| 704 | * |
| 705 | * 2) "Remote" access checking, where server is responsible for |
| 706 | * checking permission in each inode operation. An exception to this |
| 707 | * is if ->permission() was invoked from sys_access() in which case an |
| 708 | * access request is sent. Execute permission is still checked |
| 709 | * locally based on file mode. |
| 710 | */ |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 711 | static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd) |
| 712 | { |
| 713 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 714 | |
Miklos Szeredi | 87729a5 | 2005-09-09 13:10:34 -0700 | [diff] [blame] | 715 | if (!fuse_allow_task(fc, current)) |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 716 | return -EACCES; |
Miklos Szeredi | 1e9a4ed | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 717 | else if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { |
| 718 | int err = generic_permission(inode, mask, NULL); |
| 719 | |
| 720 | /* If permission is denied, try to refresh file |
| 721 | attributes. This is also needed, because the root |
| 722 | node will at first have no permissions */ |
| 723 | if (err == -EACCES) { |
| 724 | err = fuse_do_getattr(inode); |
| 725 | if (!err) |
| 726 | err = generic_permission(inode, mask, NULL); |
| 727 | } |
| 728 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 729 | /* Note: the opposite of the above test does not |
| 730 | exist. So if permissions are revoked this won't be |
| 731 | noticed immediately, only after the attribute |
| 732 | timeout has expired */ |
Miklos Szeredi | 1e9a4ed | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 733 | |
| 734 | return err; |
| 735 | } else { |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 736 | int mode = inode->i_mode; |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 737 | if ((mask & MAY_EXEC) && !S_ISDIR(mode) && !(mode & S_IXUGO)) |
| 738 | return -EACCES; |
Miklos Szeredi | 31d40d7 | 2005-11-07 00:59:50 -0800 | [diff] [blame] | 739 | |
| 740 | if (nd && (nd->flags & LOOKUP_ACCESS)) |
| 741 | return fuse_access(inode, mask); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 742 | return 0; |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | static int parse_dirfile(char *buf, size_t nbytes, struct file *file, |
| 747 | void *dstbuf, filldir_t filldir) |
| 748 | { |
| 749 | while (nbytes >= FUSE_NAME_OFFSET) { |
| 750 | struct fuse_dirent *dirent = (struct fuse_dirent *) buf; |
| 751 | size_t reclen = FUSE_DIRENT_SIZE(dirent); |
| 752 | int over; |
| 753 | if (!dirent->namelen || dirent->namelen > FUSE_NAME_MAX) |
| 754 | return -EIO; |
| 755 | if (reclen > nbytes) |
| 756 | break; |
| 757 | |
| 758 | over = filldir(dstbuf, dirent->name, dirent->namelen, |
| 759 | file->f_pos, dirent->ino, dirent->type); |
| 760 | if (over) |
| 761 | break; |
| 762 | |
| 763 | buf += reclen; |
| 764 | nbytes -= reclen; |
| 765 | file->f_pos = dirent->off; |
| 766 | } |
| 767 | |
| 768 | return 0; |
| 769 | } |
| 770 | |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 771 | static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir) |
| 772 | { |
Miklos Szeredi | 04730fe | 2005-09-09 13:10:36 -0700 | [diff] [blame] | 773 | int err; |
| 774 | size_t nbytes; |
| 775 | struct page *page; |
| 776 | struct inode *inode = file->f_dentry->d_inode; |
| 777 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 248d86e | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 778 | struct fuse_req *req; |
| 779 | |
| 780 | if (is_bad_inode(inode)) |
| 781 | return -EIO; |
| 782 | |
| 783 | req = fuse_get_request(fc); |
Miklos Szeredi | 04730fe | 2005-09-09 13:10:36 -0700 | [diff] [blame] | 784 | if (!req) |
| 785 | return -EINTR; |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 786 | |
Miklos Szeredi | 04730fe | 2005-09-09 13:10:36 -0700 | [diff] [blame] | 787 | page = alloc_page(GFP_KERNEL); |
| 788 | if (!page) { |
| 789 | fuse_put_request(fc, req); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 790 | return -ENOMEM; |
Miklos Szeredi | 04730fe | 2005-09-09 13:10:36 -0700 | [diff] [blame] | 791 | } |
| 792 | req->num_pages = 1; |
| 793 | req->pages[0] = page; |
Miklos Szeredi | 361b1eb | 2006-01-16 22:14:45 -0800 | [diff] [blame] | 794 | fuse_read_fill(req, file, inode, file->f_pos, PAGE_SIZE, FUSE_READDIR); |
| 795 | request_send(fc, req); |
| 796 | nbytes = req->out.args[0].size; |
Miklos Szeredi | 04730fe | 2005-09-09 13:10:36 -0700 | [diff] [blame] | 797 | err = req->out.h.error; |
| 798 | fuse_put_request(fc, req); |
| 799 | if (!err) |
| 800 | err = parse_dirfile(page_address(page), nbytes, file, dstbuf, |
| 801 | filldir); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 802 | |
Miklos Szeredi | 04730fe | 2005-09-09 13:10:36 -0700 | [diff] [blame] | 803 | __free_page(page); |
Miklos Szeredi | b36c31b | 2005-09-09 13:10:38 -0700 | [diff] [blame] | 804 | fuse_invalidate_attr(inode); /* atime changed */ |
Miklos Szeredi | 04730fe | 2005-09-09 13:10:36 -0700 | [diff] [blame] | 805 | return err; |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | static char *read_link(struct dentry *dentry) |
| 809 | { |
| 810 | struct inode *inode = dentry->d_inode; |
| 811 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 812 | struct fuse_req *req = fuse_get_request(fc); |
| 813 | char *link; |
| 814 | |
| 815 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 816 | return ERR_PTR(-EINTR); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 817 | |
| 818 | link = (char *) __get_free_page(GFP_KERNEL); |
| 819 | if (!link) { |
| 820 | link = ERR_PTR(-ENOMEM); |
| 821 | goto out; |
| 822 | } |
| 823 | req->in.h.opcode = FUSE_READLINK; |
| 824 | req->in.h.nodeid = get_node_id(inode); |
| 825 | req->inode = inode; |
| 826 | req->out.argvar = 1; |
| 827 | req->out.numargs = 1; |
| 828 | req->out.args[0].size = PAGE_SIZE - 1; |
| 829 | req->out.args[0].value = link; |
| 830 | request_send(fc, req); |
| 831 | if (req->out.h.error) { |
| 832 | free_page((unsigned long) link); |
| 833 | link = ERR_PTR(req->out.h.error); |
| 834 | } else |
| 835 | link[req->out.args[0].size] = '\0'; |
| 836 | out: |
| 837 | fuse_put_request(fc, req); |
Miklos Szeredi | b36c31b | 2005-09-09 13:10:38 -0700 | [diff] [blame] | 838 | fuse_invalidate_attr(inode); /* atime changed */ |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 839 | return link; |
| 840 | } |
| 841 | |
| 842 | static void free_link(char *link) |
| 843 | { |
| 844 | if (!IS_ERR(link)) |
| 845 | free_page((unsigned long) link); |
| 846 | } |
| 847 | |
| 848 | static void *fuse_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 849 | { |
| 850 | nd_set_link(nd, read_link(dentry)); |
| 851 | return NULL; |
| 852 | } |
| 853 | |
| 854 | static void fuse_put_link(struct dentry *dentry, struct nameidata *nd, void *c) |
| 855 | { |
| 856 | free_link(nd_get_link(nd)); |
| 857 | } |
| 858 | |
| 859 | static int fuse_dir_open(struct inode *inode, struct file *file) |
| 860 | { |
Miklos Szeredi | 04730fe | 2005-09-09 13:10:36 -0700 | [diff] [blame] | 861 | return fuse_open_common(inode, file, 1); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 862 | } |
| 863 | |
| 864 | static int fuse_dir_release(struct inode *inode, struct file *file) |
| 865 | { |
Miklos Szeredi | 04730fe | 2005-09-09 13:10:36 -0700 | [diff] [blame] | 866 | return fuse_release_common(inode, file, 1); |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 867 | } |
| 868 | |
Miklos Szeredi | 8254798 | 2005-09-09 13:10:38 -0700 | [diff] [blame] | 869 | static int fuse_dir_fsync(struct file *file, struct dentry *de, int datasync) |
| 870 | { |
| 871 | /* nfsd can call this with no file */ |
| 872 | return file ? fuse_fsync_common(file, de, datasync, 1) : 0; |
| 873 | } |
| 874 | |
Miklos Szeredi | befc649 | 2005-11-07 00:59:52 -0800 | [diff] [blame] | 875 | static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg) |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 876 | { |
| 877 | unsigned ivalid = iattr->ia_valid; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 878 | |
| 879 | if (ivalid & ATTR_MODE) |
Miklos Szeredi | befc649 | 2005-11-07 00:59:52 -0800 | [diff] [blame] | 880 | arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 881 | if (ivalid & ATTR_UID) |
Miklos Szeredi | befc649 | 2005-11-07 00:59:52 -0800 | [diff] [blame] | 882 | arg->valid |= FATTR_UID, arg->uid = iattr->ia_uid; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 883 | if (ivalid & ATTR_GID) |
Miklos Szeredi | befc649 | 2005-11-07 00:59:52 -0800 | [diff] [blame] | 884 | arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 885 | if (ivalid & ATTR_SIZE) |
Miklos Szeredi | befc649 | 2005-11-07 00:59:52 -0800 | [diff] [blame] | 886 | arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 887 | /* You can only _set_ these together (they may change by themselves) */ |
| 888 | if ((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) { |
Miklos Szeredi | befc649 | 2005-11-07 00:59:52 -0800 | [diff] [blame] | 889 | arg->valid |= FATTR_ATIME | FATTR_MTIME; |
| 890 | arg->atime = iattr->ia_atime.tv_sec; |
| 891 | arg->mtime = iattr->ia_mtime.tv_sec; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 892 | } |
Miklos Szeredi | befc649 | 2005-11-07 00:59:52 -0800 | [diff] [blame] | 893 | if (ivalid & ATTR_FILE) { |
| 894 | struct fuse_file *ff = iattr->ia_file->private_data; |
| 895 | arg->valid |= FATTR_FH; |
| 896 | arg->fh = ff->fh; |
| 897 | } |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 898 | } |
| 899 | |
Miklos Szeredi | 6f9f118 | 2006-01-06 00:19:39 -0800 | [diff] [blame] | 900 | /* |
| 901 | * Set attributes, and at the same time refresh them. |
| 902 | * |
| 903 | * Truncation is slightly complicated, because the 'truncate' request |
| 904 | * may fail, in which case we don't want to touch the mapping. |
| 905 | * vmtruncate() doesn't allow for this case. So do the rlimit |
| 906 | * checking by hand and call vmtruncate() only after the file has |
| 907 | * actually been truncated. |
| 908 | */ |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 909 | static int fuse_setattr(struct dentry *entry, struct iattr *attr) |
| 910 | { |
| 911 | struct inode *inode = entry->d_inode; |
| 912 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 913 | struct fuse_inode *fi = get_fuse_inode(inode); |
| 914 | struct fuse_req *req; |
| 915 | struct fuse_setattr_in inarg; |
| 916 | struct fuse_attr_out outarg; |
| 917 | int err; |
| 918 | int is_truncate = 0; |
| 919 | |
Miklos Szeredi | 1e9a4ed | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 920 | if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { |
| 921 | err = inode_change_ok(inode, attr); |
| 922 | if (err) |
| 923 | return err; |
| 924 | } |
| 925 | |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 926 | if (attr->ia_valid & ATTR_SIZE) { |
| 927 | unsigned long limit; |
| 928 | is_truncate = 1; |
| 929 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; |
| 930 | if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) { |
| 931 | send_sig(SIGXFSZ, current, 0); |
| 932 | return -EFBIG; |
| 933 | } |
| 934 | } |
| 935 | |
| 936 | req = fuse_get_request(fc); |
| 937 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 938 | return -EINTR; |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 939 | |
| 940 | memset(&inarg, 0, sizeof(inarg)); |
Miklos Szeredi | befc649 | 2005-11-07 00:59:52 -0800 | [diff] [blame] | 941 | iattr_to_fattr(attr, &inarg); |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 942 | req->in.h.opcode = FUSE_SETATTR; |
| 943 | req->in.h.nodeid = get_node_id(inode); |
| 944 | req->inode = inode; |
| 945 | req->in.numargs = 1; |
| 946 | req->in.args[0].size = sizeof(inarg); |
| 947 | req->in.args[0].value = &inarg; |
| 948 | req->out.numargs = 1; |
| 949 | req->out.args[0].size = sizeof(outarg); |
| 950 | req->out.args[0].value = &outarg; |
| 951 | request_send(fc, req); |
| 952 | err = req->out.h.error; |
| 953 | fuse_put_request(fc, req); |
| 954 | if (!err) { |
| 955 | if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) { |
| 956 | make_bad_inode(inode); |
| 957 | err = -EIO; |
| 958 | } else { |
| 959 | if (is_truncate) { |
| 960 | loff_t origsize = i_size_read(inode); |
| 961 | i_size_write(inode, outarg.attr.size); |
| 962 | if (origsize > outarg.attr.size) |
| 963 | vmtruncate(inode, outarg.attr.size); |
| 964 | } |
| 965 | fuse_change_attributes(inode, &outarg.attr); |
| 966 | fi->i_time = time_to_jiffies(outarg.attr_valid, |
| 967 | outarg.attr_valid_nsec); |
| 968 | } |
| 969 | } else if (err == -EINTR) |
| 970 | fuse_invalidate_attr(inode); |
| 971 | |
| 972 | return err; |
| 973 | } |
| 974 | |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 975 | static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry, |
| 976 | struct kstat *stat) |
| 977 | { |
| 978 | struct inode *inode = entry->d_inode; |
| 979 | int err = fuse_revalidate(entry); |
| 980 | if (!err) |
| 981 | generic_fillattr(inode, stat); |
| 982 | |
| 983 | return err; |
| 984 | } |
| 985 | |
Miklos Szeredi | 92a8780 | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 986 | static int fuse_setxattr(struct dentry *entry, const char *name, |
| 987 | const void *value, size_t size, int flags) |
| 988 | { |
| 989 | struct inode *inode = entry->d_inode; |
| 990 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 991 | struct fuse_req *req; |
| 992 | struct fuse_setxattr_in inarg; |
| 993 | int err; |
| 994 | |
Miklos Szeredi | 92a8780 | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 995 | if (fc->no_setxattr) |
| 996 | return -EOPNOTSUPP; |
| 997 | |
| 998 | req = fuse_get_request(fc); |
| 999 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 1000 | return -EINTR; |
Miklos Szeredi | 92a8780 | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 1001 | |
| 1002 | memset(&inarg, 0, sizeof(inarg)); |
| 1003 | inarg.size = size; |
| 1004 | inarg.flags = flags; |
| 1005 | req->in.h.opcode = FUSE_SETXATTR; |
| 1006 | req->in.h.nodeid = get_node_id(inode); |
| 1007 | req->inode = inode; |
| 1008 | req->in.numargs = 3; |
| 1009 | req->in.args[0].size = sizeof(inarg); |
| 1010 | req->in.args[0].value = &inarg; |
| 1011 | req->in.args[1].size = strlen(name) + 1; |
| 1012 | req->in.args[1].value = name; |
| 1013 | req->in.args[2].size = size; |
| 1014 | req->in.args[2].value = value; |
| 1015 | request_send(fc, req); |
| 1016 | err = req->out.h.error; |
| 1017 | fuse_put_request(fc, req); |
| 1018 | if (err == -ENOSYS) { |
| 1019 | fc->no_setxattr = 1; |
| 1020 | err = -EOPNOTSUPP; |
| 1021 | } |
| 1022 | return err; |
| 1023 | } |
| 1024 | |
| 1025 | static ssize_t fuse_getxattr(struct dentry *entry, const char *name, |
| 1026 | void *value, size_t size) |
| 1027 | { |
| 1028 | struct inode *inode = entry->d_inode; |
| 1029 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 1030 | struct fuse_req *req; |
| 1031 | struct fuse_getxattr_in inarg; |
| 1032 | struct fuse_getxattr_out outarg; |
| 1033 | ssize_t ret; |
| 1034 | |
| 1035 | if (fc->no_getxattr) |
| 1036 | return -EOPNOTSUPP; |
| 1037 | |
| 1038 | req = fuse_get_request(fc); |
| 1039 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 1040 | return -EINTR; |
Miklos Szeredi | 92a8780 | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 1041 | |
| 1042 | memset(&inarg, 0, sizeof(inarg)); |
| 1043 | inarg.size = size; |
| 1044 | req->in.h.opcode = FUSE_GETXATTR; |
| 1045 | req->in.h.nodeid = get_node_id(inode); |
| 1046 | req->inode = inode; |
| 1047 | req->in.numargs = 2; |
| 1048 | req->in.args[0].size = sizeof(inarg); |
| 1049 | req->in.args[0].value = &inarg; |
| 1050 | req->in.args[1].size = strlen(name) + 1; |
| 1051 | req->in.args[1].value = name; |
| 1052 | /* This is really two different operations rolled into one */ |
| 1053 | req->out.numargs = 1; |
| 1054 | if (size) { |
| 1055 | req->out.argvar = 1; |
| 1056 | req->out.args[0].size = size; |
| 1057 | req->out.args[0].value = value; |
| 1058 | } else { |
| 1059 | req->out.args[0].size = sizeof(outarg); |
| 1060 | req->out.args[0].value = &outarg; |
| 1061 | } |
| 1062 | request_send(fc, req); |
| 1063 | ret = req->out.h.error; |
| 1064 | if (!ret) |
| 1065 | ret = size ? req->out.args[0].size : outarg.size; |
| 1066 | else { |
| 1067 | if (ret == -ENOSYS) { |
| 1068 | fc->no_getxattr = 1; |
| 1069 | ret = -EOPNOTSUPP; |
| 1070 | } |
| 1071 | } |
| 1072 | fuse_put_request(fc, req); |
| 1073 | return ret; |
| 1074 | } |
| 1075 | |
| 1076 | static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) |
| 1077 | { |
| 1078 | struct inode *inode = entry->d_inode; |
| 1079 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 1080 | struct fuse_req *req; |
| 1081 | struct fuse_getxattr_in inarg; |
| 1082 | struct fuse_getxattr_out outarg; |
| 1083 | ssize_t ret; |
| 1084 | |
| 1085 | if (fc->no_listxattr) |
| 1086 | return -EOPNOTSUPP; |
| 1087 | |
| 1088 | req = fuse_get_request(fc); |
| 1089 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 1090 | return -EINTR; |
Miklos Szeredi | 92a8780 | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 1091 | |
| 1092 | memset(&inarg, 0, sizeof(inarg)); |
| 1093 | inarg.size = size; |
| 1094 | req->in.h.opcode = FUSE_LISTXATTR; |
| 1095 | req->in.h.nodeid = get_node_id(inode); |
| 1096 | req->inode = inode; |
| 1097 | req->in.numargs = 1; |
| 1098 | req->in.args[0].size = sizeof(inarg); |
| 1099 | req->in.args[0].value = &inarg; |
| 1100 | /* This is really two different operations rolled into one */ |
| 1101 | req->out.numargs = 1; |
| 1102 | if (size) { |
| 1103 | req->out.argvar = 1; |
| 1104 | req->out.args[0].size = size; |
| 1105 | req->out.args[0].value = list; |
| 1106 | } else { |
| 1107 | req->out.args[0].size = sizeof(outarg); |
| 1108 | req->out.args[0].value = &outarg; |
| 1109 | } |
| 1110 | request_send(fc, req); |
| 1111 | ret = req->out.h.error; |
| 1112 | if (!ret) |
| 1113 | ret = size ? req->out.args[0].size : outarg.size; |
| 1114 | else { |
| 1115 | if (ret == -ENOSYS) { |
| 1116 | fc->no_listxattr = 1; |
| 1117 | ret = -EOPNOTSUPP; |
| 1118 | } |
| 1119 | } |
| 1120 | fuse_put_request(fc, req); |
| 1121 | return ret; |
| 1122 | } |
| 1123 | |
| 1124 | static int fuse_removexattr(struct dentry *entry, const char *name) |
| 1125 | { |
| 1126 | struct inode *inode = entry->d_inode; |
| 1127 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 1128 | struct fuse_req *req; |
| 1129 | int err; |
| 1130 | |
| 1131 | if (fc->no_removexattr) |
| 1132 | return -EOPNOTSUPP; |
| 1133 | |
| 1134 | req = fuse_get_request(fc); |
| 1135 | if (!req) |
Miklos Szeredi | 7c352bd | 2005-09-09 13:10:39 -0700 | [diff] [blame] | 1136 | return -EINTR; |
Miklos Szeredi | 92a8780 | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 1137 | |
| 1138 | req->in.h.opcode = FUSE_REMOVEXATTR; |
| 1139 | req->in.h.nodeid = get_node_id(inode); |
| 1140 | req->inode = inode; |
| 1141 | req->in.numargs = 1; |
| 1142 | req->in.args[0].size = strlen(name) + 1; |
| 1143 | req->in.args[0].value = name; |
| 1144 | request_send(fc, req); |
| 1145 | err = req->out.h.error; |
| 1146 | fuse_put_request(fc, req); |
| 1147 | if (err == -ENOSYS) { |
| 1148 | fc->no_removexattr = 1; |
| 1149 | err = -EOPNOTSUPP; |
| 1150 | } |
| 1151 | return err; |
| 1152 | } |
| 1153 | |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 1154 | static struct inode_operations fuse_dir_inode_operations = { |
| 1155 | .lookup = fuse_lookup, |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 1156 | .mkdir = fuse_mkdir, |
| 1157 | .symlink = fuse_symlink, |
| 1158 | .unlink = fuse_unlink, |
| 1159 | .rmdir = fuse_rmdir, |
| 1160 | .rename = fuse_rename, |
| 1161 | .link = fuse_link, |
| 1162 | .setattr = fuse_setattr, |
| 1163 | .create = fuse_create, |
| 1164 | .mknod = fuse_mknod, |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 1165 | .permission = fuse_permission, |
| 1166 | .getattr = fuse_getattr, |
Miklos Szeredi | 92a8780 | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 1167 | .setxattr = fuse_setxattr, |
| 1168 | .getxattr = fuse_getxattr, |
| 1169 | .listxattr = fuse_listxattr, |
| 1170 | .removexattr = fuse_removexattr, |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 1171 | }; |
| 1172 | |
| 1173 | static struct file_operations fuse_dir_operations = { |
Miklos Szeredi | b6aeade | 2005-09-09 13:10:30 -0700 | [diff] [blame] | 1174 | .llseek = generic_file_llseek, |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 1175 | .read = generic_read_dir, |
| 1176 | .readdir = fuse_readdir, |
| 1177 | .open = fuse_dir_open, |
| 1178 | .release = fuse_dir_release, |
Miklos Szeredi | 8254798 | 2005-09-09 13:10:38 -0700 | [diff] [blame] | 1179 | .fsync = fuse_dir_fsync, |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 1180 | }; |
| 1181 | |
| 1182 | static struct inode_operations fuse_common_inode_operations = { |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 1183 | .setattr = fuse_setattr, |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 1184 | .permission = fuse_permission, |
| 1185 | .getattr = fuse_getattr, |
Miklos Szeredi | 92a8780 | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 1186 | .setxattr = fuse_setxattr, |
| 1187 | .getxattr = fuse_getxattr, |
| 1188 | .listxattr = fuse_listxattr, |
| 1189 | .removexattr = fuse_removexattr, |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 1190 | }; |
| 1191 | |
| 1192 | static struct inode_operations fuse_symlink_inode_operations = { |
Miklos Szeredi | 9e6268d | 2005-09-09 13:10:29 -0700 | [diff] [blame] | 1193 | .setattr = fuse_setattr, |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 1194 | .follow_link = fuse_follow_link, |
| 1195 | .put_link = fuse_put_link, |
| 1196 | .readlink = generic_readlink, |
| 1197 | .getattr = fuse_getattr, |
Miklos Szeredi | 92a8780 | 2005-09-09 13:10:31 -0700 | [diff] [blame] | 1198 | .setxattr = fuse_setxattr, |
| 1199 | .getxattr = fuse_getxattr, |
| 1200 | .listxattr = fuse_listxattr, |
| 1201 | .removexattr = fuse_removexattr, |
Miklos Szeredi | e5e5558 | 2005-09-09 13:10:28 -0700 | [diff] [blame] | 1202 | }; |
| 1203 | |
| 1204 | void fuse_init_common(struct inode *inode) |
| 1205 | { |
| 1206 | inode->i_op = &fuse_common_inode_operations; |
| 1207 | } |
| 1208 | |
| 1209 | void fuse_init_dir(struct inode *inode) |
| 1210 | { |
| 1211 | inode->i_op = &fuse_dir_inode_operations; |
| 1212 | inode->i_fop = &fuse_dir_operations; |
| 1213 | } |
| 1214 | |
| 1215 | void fuse_init_symlink(struct inode *inode) |
| 1216 | { |
| 1217 | inode->i_op = &fuse_symlink_inode_operations; |
| 1218 | } |