Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 1 | /* |
| 2 | FUSE: Filesystem in Userspace |
| 3 | Copyright (C) 2001 Miklos Szeredi (mszeredi@inf.bme.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/module.h> |
| 12 | #include <linux/kernel.h> |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 13 | #include <linux/slab.h> |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 14 | #include <linux/file.h> |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 15 | |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 16 | static struct inode_operations fuse_dir_inode_operations; |
| 17 | static struct inode_operations fuse_file_inode_operations; |
| 18 | static struct inode_operations fuse_symlink_inode_operations; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 19 | |
| 20 | static struct file_operations fuse_dir_operations; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 21 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 22 | static struct dentry_operations fuse_dentry_opertations; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 23 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 24 | static void change_attributes(struct inode *inode, struct fuse_attr *attr) |
| 25 | { |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 26 | if(S_ISREG(inode->i_mode) && inode->i_size != attr->size) |
| 27 | invalidate_inode_pages(inode); |
| 28 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 29 | inode->i_mode = (inode->i_mode & S_IFMT) + (attr->mode & 07777); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 30 | inode->i_nlink = attr->nlink; |
| 31 | inode->i_uid = attr->uid; |
| 32 | inode->i_gid = attr->gid; |
| 33 | inode->i_size = attr->size; |
| 34 | inode->i_blksize = attr->blksize; |
| 35 | inode->i_blocks = attr->blocks; |
| 36 | inode->i_atime = attr->atime; |
| 37 | inode->i_mtime = attr->mtime; |
| 38 | inode->i_ctime = attr->ctime; |
| 39 | } |
| 40 | |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 41 | static void fuse_init_inode(struct inode *inode, struct fuse_attr *attr) |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 42 | { |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 43 | inode->i_mode = attr->mode & S_IFMT; |
| 44 | inode->i_size = attr->size; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 45 | if(S_ISREG(inode->i_mode)) { |
| 46 | inode->i_op = &fuse_file_inode_operations; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 47 | fuse_init_file_inode(inode); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 48 | } |
| 49 | else if(S_ISDIR(inode->i_mode)) { |
| 50 | inode->i_op = &fuse_dir_inode_operations; |
| 51 | inode->i_fop = &fuse_dir_operations; |
| 52 | } |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 53 | else if(S_ISLNK(inode->i_mode)) { |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 54 | inode->i_op = &fuse_symlink_inode_operations; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 55 | } |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 56 | else { |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 57 | inode->i_op = &fuse_file_inode_operations; |
| 58 | init_special_inode(inode, inode->i_mode, attr->rdev); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 59 | } |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 60 | inode->u.generic_ip = inode; |
| 61 | } |
| 62 | |
| 63 | struct inode *fuse_iget(struct super_block *sb, ino_t ino, |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 64 | struct fuse_attr *attr, int version) |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 65 | { |
| 66 | struct inode *inode; |
| 67 | |
| 68 | inode = iget(sb, ino); |
| 69 | if(inode) { |
| 70 | if(!inode->u.generic_ip) |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 71 | fuse_init_inode(inode, attr); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 72 | |
| 73 | change_attributes(inode, attr); |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 74 | inode->i_version = version; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | return inode; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 78 | } |
| 79 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 80 | static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry) |
| 81 | { |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 82 | int ret; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 83 | struct fuse_conn *fc = INO_FC(dir); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 84 | struct fuse_in in = FUSE_IN_INIT; |
| 85 | struct fuse_out out = FUSE_OUT_INIT; |
| 86 | struct fuse_lookup_out arg; |
| 87 | struct inode *inode; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 88 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 89 | in.h.opcode = FUSE_LOOKUP; |
| 90 | in.h.ino = dir->i_ino; |
| 91 | in.argsize = entry->d_name.len + 1; |
| 92 | in.arg = entry->d_name.name; |
| 93 | out.argsize = sizeof(arg); |
| 94 | out.arg = &arg; |
| 95 | request_send(fc, &in, &out); |
| 96 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 97 | inode = NULL; |
| 98 | if(!out.h.error) { |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 99 | ret = -ENOMEM; |
| 100 | inode = fuse_iget(dir->i_sb, arg.ino, &arg.attr, out.h.unique); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 101 | if(!inode) |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 102 | goto err; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 103 | } |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 104 | else if(out.h.error != -ENOENT) { |
| 105 | ret = out.h.error; |
| 106 | goto err; |
| 107 | } |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 108 | |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 109 | entry->d_time = jiffies; |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 110 | entry->d_op = &fuse_dentry_opertations; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 111 | d_add(entry, inode); |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 112 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 113 | return NULL; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 114 | |
| 115 | err: |
| 116 | return ERR_PTR(ret); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 117 | } |
| 118 | |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 119 | /* create needs to return a positive entry, so this also does a lookup */ |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 120 | static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode, |
| 121 | int rdev) |
| 122 | { |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 123 | struct fuse_conn *fc = INO_FC(dir); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 124 | struct fuse_in in = FUSE_IN_INIT; |
| 125 | struct fuse_out out = FUSE_OUT_INIT; |
| 126 | struct fuse_mknod_in *inarg; |
| 127 | unsigned int insize; |
| 128 | struct fuse_mknod_out outarg; |
| 129 | struct inode *inode; |
| 130 | |
| 131 | insize = offsetof(struct fuse_mknod_in, name) + entry->d_name.len + 1; |
| 132 | inarg = kmalloc(insize, GFP_KERNEL); |
| 133 | if(!inarg) |
| 134 | return -ENOMEM; |
| 135 | |
| 136 | inarg->mode = mode; |
| 137 | inarg->rdev = rdev; |
| 138 | strcpy(inarg->name, entry->d_name.name); |
| 139 | |
| 140 | in.h.opcode = FUSE_MKNOD; |
| 141 | in.h.ino = dir->i_ino; |
| 142 | in.argsize = insize; |
| 143 | in.arg = inarg; |
| 144 | out.argsize = sizeof(outarg); |
| 145 | out.arg = &outarg; |
| 146 | request_send(fc, &in, &out); |
| 147 | kfree(inarg); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 148 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 149 | if(out.h.error) |
| 150 | return out.h.error; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 151 | |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 152 | inode = fuse_iget(dir->i_sb, outarg.ino, &outarg.attr, out.h.unique); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 153 | if(!inode) |
| 154 | return -ENOMEM; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 155 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 156 | d_instantiate(entry, inode); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 157 | return 0; |
| 158 | } |
| 159 | |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 160 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 161 | static int fuse_create(struct inode *dir, struct dentry *entry, int mode) |
| 162 | { |
| 163 | return fuse_mknod(dir, entry, mode, 0); |
| 164 | } |
| 165 | |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 166 | static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode) |
| 167 | { |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 168 | struct fuse_conn *fc = INO_FC(dir); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 169 | struct fuse_in in = FUSE_IN_INIT; |
| 170 | struct fuse_out out = FUSE_OUT_INIT; |
| 171 | struct fuse_mkdir_in *inarg; |
| 172 | unsigned int insize; |
| 173 | |
| 174 | insize = offsetof(struct fuse_mkdir_in, name) + entry->d_name.len + 1; |
| 175 | inarg = kmalloc(insize, GFP_KERNEL); |
| 176 | if(!inarg) |
| 177 | return -ENOMEM; |
| 178 | |
| 179 | inarg->mode = mode; |
| 180 | strcpy(inarg->name, entry->d_name.name); |
| 181 | |
| 182 | in.h.opcode = FUSE_MKDIR; |
| 183 | in.h.ino = dir->i_ino; |
| 184 | in.argsize = insize; |
| 185 | in.arg = inarg; |
| 186 | request_send(fc, &in, &out); |
| 187 | kfree(inarg); |
| 188 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 189 | return out.h.error; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static int fuse_symlink(struct inode *dir, struct dentry *entry, |
| 193 | const char *link) |
| 194 | { |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 195 | struct fuse_conn *fc = INO_FC(dir); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 196 | struct fuse_in in = FUSE_IN_INIT; |
| 197 | struct fuse_out out = FUSE_OUT_INIT; |
| 198 | char *inarg; |
| 199 | unsigned int insize; |
| 200 | |
| 201 | insize = entry->d_name.len + 1 + strlen(link) + 1; |
| 202 | inarg = kmalloc(insize, GFP_KERNEL); |
| 203 | if(!inarg) |
| 204 | return -ENOMEM; |
| 205 | |
| 206 | strcpy(inarg, entry->d_name.name); |
| 207 | strcpy(inarg + entry->d_name.len + 1, link); |
| 208 | |
| 209 | in.h.opcode = FUSE_SYMLINK; |
| 210 | in.h.ino = dir->i_ino; |
| 211 | in.argsize = insize; |
| 212 | in.arg = inarg; |
| 213 | request_send(fc, &in, &out); |
| 214 | kfree(inarg); |
| 215 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 216 | return out.h.error; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | static int fuse_remove(struct inode *dir, struct dentry *entry, |
| 220 | enum fuse_opcode op) |
| 221 | { |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 222 | struct fuse_conn *fc = INO_FC(dir); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 223 | struct fuse_in in = FUSE_IN_INIT; |
| 224 | struct fuse_out out = FUSE_OUT_INIT; |
| 225 | |
| 226 | in.h.opcode = op; |
| 227 | in.h.ino = dir->i_ino; |
| 228 | in.argsize = entry->d_name.len + 1; |
| 229 | in.arg = entry->d_name.name; |
| 230 | request_send(fc, &in, &out); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 231 | return out.h.error; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | static int fuse_unlink(struct inode *dir, struct dentry *entry) |
| 235 | { |
| 236 | return fuse_remove(dir, entry, FUSE_UNLINK); |
| 237 | } |
| 238 | |
| 239 | static int fuse_rmdir(struct inode *dir, struct dentry *entry) |
| 240 | { |
| 241 | return fuse_remove(dir, entry, FUSE_RMDIR); |
| 242 | } |
| 243 | |
| 244 | static int fuse_rename(struct inode *olddir, struct dentry *oldent, |
| 245 | struct inode *newdir, struct dentry *newent) |
| 246 | { |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 247 | struct fuse_conn *fc = INO_FC(olddir); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 248 | struct fuse_in in = FUSE_IN_INIT; |
| 249 | struct fuse_out out = FUSE_OUT_INIT; |
| 250 | struct fuse_rename_in *inarg; |
| 251 | unsigned int oldnamsize = oldent->d_name.len + 1; |
| 252 | unsigned int newnamsize = newent->d_name.len + 1; |
| 253 | unsigned int insize; |
| 254 | |
| 255 | insize = offsetof(struct fuse_rename_in, names) + oldnamsize + |
| 256 | newnamsize; |
| 257 | inarg = kmalloc(insize, GFP_KERNEL); |
| 258 | if(!inarg) |
| 259 | return -ENOMEM; |
| 260 | |
| 261 | inarg->newdir = newdir->i_ino; |
| 262 | strcpy(inarg->names, oldent->d_name.name); |
| 263 | strcpy(inarg->names + oldnamsize, newent->d_name.name); |
| 264 | |
| 265 | in.h.opcode = FUSE_RENAME; |
| 266 | in.h.ino = olddir->i_ino; |
| 267 | in.argsize = insize; |
| 268 | in.arg = inarg; |
| 269 | request_send(fc, &in, &out); |
| 270 | kfree(inarg); |
| 271 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 272 | return out.h.error; |
| 273 | } |
| 274 | |
| 275 | static int fuse_link(struct dentry *entry, struct inode *newdir, |
| 276 | struct dentry *newent) |
| 277 | { |
| 278 | struct inode *inode = entry->d_inode; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 279 | struct fuse_conn *fc = INO_FC(inode); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 280 | struct fuse_in in = FUSE_IN_INIT; |
| 281 | struct fuse_out out = FUSE_OUT_INIT; |
| 282 | struct fuse_link_in *inarg; |
| 283 | unsigned int insize; |
| 284 | |
| 285 | insize = offsetof(struct fuse_link_in, name) + newent->d_name.len + 1; |
| 286 | inarg = kmalloc(insize, GFP_KERNEL); |
| 287 | if(!inarg) |
| 288 | return -ENOMEM; |
| 289 | |
| 290 | inarg->newdir = newdir->i_ino; |
| 291 | strcpy(inarg->name, newent->d_name.name); |
| 292 | |
| 293 | in.h.opcode = FUSE_LINK; |
| 294 | in.h.ino = inode->i_ino; |
| 295 | in.argsize = insize; |
| 296 | in.arg = inarg; |
| 297 | request_send(fc, &in, &out); |
| 298 | kfree(inarg); |
| 299 | |
| 300 | return out.h.error; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 301 | } |
| 302 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 303 | static int fuse_permission(struct inode *inode, int mask) |
| 304 | { |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 305 | return 0; |
| 306 | } |
| 307 | |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 308 | static int fuse_revalidate(struct dentry *entry) |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 309 | { |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 310 | struct inode *inode = entry->d_inode; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 311 | struct fuse_conn *fc = INO_FC(inode); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 312 | struct fuse_in in = FUSE_IN_INIT; |
| 313 | struct fuse_out out = FUSE_OUT_INIT; |
| 314 | struct fuse_getattr_out arg; |
| 315 | |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 316 | if(inode->i_ino != FUSE_ROOT_INO && |
| 317 | time_before_eq(jiffies, entry->d_time + HZ / 100)) |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 318 | return 0; |
| 319 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 320 | in.h.opcode = FUSE_GETATTR; |
| 321 | in.h.ino = inode->i_ino; |
| 322 | out.argsize = sizeof(arg); |
| 323 | out.arg = &arg; |
| 324 | request_send(fc, &in, &out); |
| 325 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 326 | if(!out.h.error) |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 327 | change_attributes(inode, &arg.attr); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 328 | |
| 329 | return out.h.error; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 330 | } |
| 331 | |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 332 | static int parse_dirfile(char *buf, size_t nbytes, struct file *file, |
| 333 | void *dstbuf, filldir_t filldir) |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 334 | { |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 335 | while(nbytes >= FUSE_NAME_OFFSET) { |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 336 | struct fuse_dirent *dirent = (struct fuse_dirent *) buf; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 337 | size_t reclen = FUSE_DIRENT_SIZE(dirent); |
| 338 | int over; |
| 339 | if(dirent->namelen > NAME_MAX) { |
| 340 | printk("fuse_readdir: name too long\n"); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 341 | return -EPROTO; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 342 | } |
| 343 | if(reclen > nbytes) |
| 344 | break; |
| 345 | |
| 346 | over = filldir(dstbuf, dirent->name, dirent->namelen, |
| 347 | file->f_pos, dirent->ino, dirent->type); |
| 348 | if(over) |
| 349 | break; |
| 350 | |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 351 | buf += reclen; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 352 | file->f_pos += reclen; |
| 353 | nbytes -= reclen; |
| 354 | } |
| 355 | |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | #define DIR_BUFSIZE 2048 |
| 360 | static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir) |
| 361 | { |
| 362 | struct file *cfile = file->private_data; |
| 363 | char *buf; |
| 364 | int ret; |
| 365 | |
| 366 | buf = kmalloc(DIR_BUFSIZE, GFP_KERNEL); |
| 367 | if(!buf) |
| 368 | return -ENOMEM; |
| 369 | |
| 370 | ret = kernel_read(cfile, file->f_pos, buf, DIR_BUFSIZE); |
| 371 | if(ret < 0) |
| 372 | printk("fuse_readdir: failed to read container file\n"); |
| 373 | else |
| 374 | ret = parse_dirfile(buf, ret, file, dstbuf, filldir); |
| 375 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 376 | kfree(buf); |
| 377 | return ret; |
| 378 | } |
| 379 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 380 | static int read_link(struct dentry *dentry, char **bufp) |
| 381 | { |
| 382 | struct inode *inode = dentry->d_inode; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 383 | struct fuse_conn *fc = INO_FC(inode); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 384 | struct fuse_in in = FUSE_IN_INIT; |
| 385 | struct fuse_out out = FUSE_OUT_INIT; |
| 386 | unsigned long page; |
| 387 | |
| 388 | page = __get_free_page(GFP_KERNEL); |
| 389 | if(!page) |
| 390 | return -ENOMEM; |
| 391 | |
| 392 | in.h.opcode = FUSE_READLINK; |
| 393 | in.h.ino = inode->i_ino; |
| 394 | out.arg = (void *) page; |
| 395 | out.argsize = PAGE_SIZE - 1; |
| 396 | out.argvar = 1; |
| 397 | request_send(fc, &in, &out); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 398 | if(out.h.error) { |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 399 | free_page(page); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 400 | return out.h.error; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | *bufp = (char *) page; |
| 404 | (*bufp)[out.argsize] = '\0'; |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | static void free_link(char *link) |
| 409 | { |
| 410 | free_page((unsigned long) link); |
| 411 | } |
| 412 | |
| 413 | static int fuse_readlink(struct dentry *dentry, char *buffer, int buflen) |
| 414 | { |
| 415 | int ret; |
| 416 | char *link; |
| 417 | |
| 418 | ret = read_link(dentry, &link); |
| 419 | if(ret) |
| 420 | return ret; |
| 421 | |
| 422 | ret = vfs_readlink(dentry, buffer, buflen, link); |
| 423 | free_link(link); |
| 424 | return ret; |
| 425 | } |
| 426 | |
| 427 | static int fuse_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 428 | { |
| 429 | int ret; |
| 430 | char *link; |
| 431 | |
| 432 | ret = read_link(dentry, &link); |
| 433 | if(ret) |
| 434 | return ret; |
| 435 | |
| 436 | ret = vfs_follow_link(nd, link); |
| 437 | free_link(link); |
| 438 | return ret; |
| 439 | } |
| 440 | |
| 441 | static int fuse_dir_open(struct inode *inode, struct file *file) |
| 442 | { |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 443 | struct fuse_conn *fc = INO_FC(inode); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 444 | struct fuse_in in = FUSE_IN_INIT; |
| 445 | struct fuse_out out = FUSE_OUT_INIT; |
| 446 | struct fuse_getdir_out outarg; |
| 447 | |
| 448 | if(!(file->f_flags & O_DIRECTORY)) |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 449 | return 0; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 450 | |
| 451 | in.h.opcode = FUSE_GETDIR; |
| 452 | in.h.ino = inode->i_ino; |
| 453 | out.argsize = sizeof(outarg); |
| 454 | out.arg = &outarg; |
| 455 | request_send(fc, &in, &out); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 456 | if(!out.h.error) { |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 457 | struct file *cfile = outarg.file; |
| 458 | struct inode *inode; |
| 459 | if(!cfile) { |
| 460 | printk("fuse_getdir: invalid file\n"); |
| 461 | return -EPROTO; |
| 462 | } |
| 463 | inode = cfile->f_dentry->d_inode; |
| 464 | if(!S_ISREG(inode->i_mode)) { |
| 465 | printk("fuse_getdir: not a regular file\n"); |
| 466 | fput(cfile); |
| 467 | return -EPROTO; |
| 468 | } |
| 469 | |
| 470 | file->private_data = cfile; |
| 471 | } |
| 472 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 473 | return out.h.error; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | static int fuse_dir_release(struct inode *inode, struct file *file) |
| 477 | { |
| 478 | struct file *cfile = file->private_data; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 479 | |
| 480 | if(cfile) |
| 481 | fput(cfile); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 482 | |
| 483 | return 0; |
| 484 | } |
| 485 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 486 | static unsigned int iattr_to_fattr(struct iattr *iattr, |
| 487 | struct fuse_attr *fattr) |
| 488 | { |
| 489 | unsigned int ivalid = iattr->ia_valid; |
| 490 | unsigned int fvalid = 0; |
| 491 | |
| 492 | memset(fattr, 0, sizeof(*fattr)); |
| 493 | |
| 494 | if(ivalid & ATTR_MODE) |
| 495 | fvalid |= FATTR_MODE, fattr->mode = iattr->ia_mode; |
| 496 | if(ivalid & ATTR_UID) |
| 497 | fvalid |= FATTR_UID, fattr->uid = iattr->ia_uid; |
| 498 | if(ivalid & ATTR_GID) |
| 499 | fvalid |= FATTR_GID, fattr->gid = iattr->ia_gid; |
| 500 | if(ivalid & ATTR_SIZE) |
| 501 | fvalid |= FATTR_SIZE, fattr->size = iattr->ia_size; |
| 502 | /* You can only _set_ these together (they may change by themselves) */ |
| 503 | if((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) { |
| 504 | fvalid |= FATTR_UTIME; |
| 505 | fattr->atime = iattr->ia_atime; |
| 506 | fattr->mtime = iattr->ia_mtime; |
| 507 | } |
| 508 | |
| 509 | return fvalid; |
| 510 | } |
| 511 | |
| 512 | static int fuse_setattr(struct dentry *entry, struct iattr *attr) |
| 513 | { |
| 514 | struct inode *inode = entry->d_inode; |
| 515 | struct fuse_conn *fc = INO_FC(inode); |
| 516 | struct fuse_in in = FUSE_IN_INIT; |
| 517 | struct fuse_out out = FUSE_OUT_INIT; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 518 | struct fuse_setattr_in inarg; |
| 519 | struct fuse_setattr_out outarg; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 520 | |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 521 | inarg.valid = iattr_to_fattr(attr, &inarg.attr); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 522 | |
| 523 | in.h.opcode = FUSE_SETATTR; |
| 524 | in.h.ino = inode->i_ino; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 525 | in.argsize = sizeof(inarg); |
| 526 | in.arg = &inarg; |
| 527 | out.argsize = sizeof(outarg); |
| 528 | out.arg = &outarg; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 529 | request_send(fc, &in, &out); |
| 530 | |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame^] | 531 | if(!out.h.error && (attr->ia_valid & ATTR_SIZE)) { |
| 532 | if(outarg.newsize > attr->ia_size) |
| 533 | outarg.newsize = attr->ia_size; |
| 534 | |
| 535 | vmtruncate(inode, outarg.newsize); |
| 536 | } |
| 537 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 538 | return out.h.error; |
| 539 | } |
| 540 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 541 | static int fuse_dentry_revalidate(struct dentry *entry, int flags) |
| 542 | { |
| 543 | if(!entry->d_inode || !(flags & LOOKUP_CONTINUE)) |
| 544 | return 0; |
| 545 | else |
| 546 | return 1; |
| 547 | } |
| 548 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 549 | static struct inode_operations fuse_dir_inode_operations = |
| 550 | { |
| 551 | lookup: fuse_lookup, |
| 552 | create: fuse_create, |
| 553 | mknod: fuse_mknod, |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 554 | mkdir: fuse_mkdir, |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 555 | symlink: fuse_symlink, |
| 556 | unlink: fuse_unlink, |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 557 | rmdir: fuse_rmdir, |
| 558 | rename: fuse_rename, |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 559 | link: fuse_link, |
| 560 | setattr: fuse_setattr, |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 561 | permission: fuse_permission, |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 562 | revalidate: fuse_revalidate, |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 563 | }; |
| 564 | |
| 565 | static struct file_operations fuse_dir_operations = { |
| 566 | read: generic_read_dir, |
| 567 | readdir: fuse_readdir, |
| 568 | open: fuse_dir_open, |
| 569 | release: fuse_dir_release, |
| 570 | }; |
| 571 | |
| 572 | static struct inode_operations fuse_file_inode_operations = { |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 573 | setattr: fuse_setattr, |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 574 | permission: fuse_permission, |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 575 | revalidate: fuse_revalidate, |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 576 | }; |
| 577 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 578 | static struct inode_operations fuse_symlink_inode_operations = |
| 579 | { |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 580 | setattr: fuse_setattr, |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 581 | readlink: fuse_readlink, |
| 582 | follow_link: fuse_follow_link, |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 583 | revalidate: fuse_revalidate, |
| 584 | }; |
| 585 | |
| 586 | static struct dentry_operations fuse_dentry_opertations = { |
| 587 | d_revalidate: fuse_dentry_revalidate, |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 588 | }; |
| 589 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 590 | /* |
| 591 | * Local Variables: |
| 592 | * indent-tabs-mode: t |
| 593 | * c-basic-offset: 8 |
| 594 | * End: |
| 595 | */ |