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715f6251 | 1 | /* |
2 | * This file is part of the SPL: Solaris Porting Layer. | |
3 | * | |
4 | * Copyright (c) 2008 Lawrence Livermore National Security, LLC. | |
5 | * Produced at Lawrence Livermore National Laboratory | |
6 | * Written by: | |
7 | * Brian Behlendorf <behlendorf1@llnl.gov>, | |
8 | * Herb Wartens <wartens2@llnl.gov>, | |
9 | * Jim Garlick <garlick@llnl.gov> | |
10 | * UCRL-CODE-235197 | |
11 | * | |
12 | * This is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This is distributed in the hope that it will be useful, but WITHOUT | |
18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
20 | * for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License along | |
23 | * with this program; if not, write to the Free Software Foundation, Inc., | |
24 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
25 | */ | |
26 | ||
0b3cf046 | 27 | #include <sys/sysmacros.h> |
4b171585 | 28 | #include <sys/vnode.h> |
0b3cf046 | 29 | |
937879f1 | 30 | |
31 | #ifdef DEBUG_SUBSYSTEM | |
32 | #undef DEBUG_SUBSYSTEM | |
33 | #endif | |
34 | ||
35 | #define DEBUG_SUBSYSTEM S_VNODE | |
36 | ||
4b171585 | 37 | void *rootdir = NULL; |
38 | EXPORT_SYMBOL(rootdir); | |
39 | ||
7afde631 | 40 | static spl_kmem_cache_t *vn_cache; |
41 | static spl_kmem_cache_t *vn_file_cache; | |
e4f1d29f | 42 | |
43 | static spinlock_t vn_file_lock = SPIN_LOCK_UNLOCKED; | |
44 | static LIST_HEAD(vn_file_list); | |
af828292 | 45 | |
4b171585 | 46 | static vtype_t |
47 | vn_get_sol_type(umode_t mode) | |
48 | { | |
49 | if (S_ISREG(mode)) | |
50 | return VREG; | |
51 | ||
52 | if (S_ISDIR(mode)) | |
53 | return VDIR; | |
54 | ||
55 | if (S_ISCHR(mode)) | |
56 | return VCHR; | |
57 | ||
58 | if (S_ISBLK(mode)) | |
59 | return VBLK; | |
60 | ||
61 | if (S_ISFIFO(mode)) | |
62 | return VFIFO; | |
63 | ||
64 | if (S_ISLNK(mode)) | |
65 | return VLNK; | |
66 | ||
67 | if (S_ISSOCK(mode)) | |
68 | return VSOCK; | |
69 | ||
70 | if (S_ISCHR(mode)) | |
71 | return VCHR; | |
72 | ||
73 | return VNON; | |
74 | } /* vn_get_sol_type() */ | |
75 | ||
af828292 | 76 | vnode_t * |
77 | vn_alloc(int flag) | |
78 | { | |
79 | vnode_t *vp; | |
937879f1 | 80 | ENTRY; |
af828292 | 81 | |
82 | vp = kmem_cache_alloc(vn_cache, flag); | |
af828292 | 83 | if (vp != NULL) { |
e4f1d29f | 84 | vp->v_file = NULL; |
af828292 | 85 | vp->v_type = 0; |
86 | } | |
87 | ||
937879f1 | 88 | RETURN(vp); |
af828292 | 89 | } /* vn_alloc() */ |
90 | EXPORT_SYMBOL(vn_alloc); | |
91 | ||
92 | void | |
93 | vn_free(vnode_t *vp) | |
94 | { | |
937879f1 | 95 | ENTRY; |
af828292 | 96 | kmem_cache_free(vn_cache, vp); |
937879f1 | 97 | EXIT; |
af828292 | 98 | } /* vn_free() */ |
99 | EXPORT_SYMBOL(vn_free); | |
100 | ||
0b3cf046 | 101 | int |
af828292 | 102 | vn_open(const char *path, uio_seg_t seg, int flags, int mode, |
4b171585 | 103 | vnode_t **vpp, int x1, void *x2) |
0b3cf046 | 104 | { |
4b171585 | 105 | struct file *fp; |
106 | struct kstat stat; | |
57d86234 | 107 | int rc, saved_umask = 0; |
0b3cf046 | 108 | vnode_t *vp; |
937879f1 | 109 | ENTRY; |
0b3cf046 | 110 | |
937879f1 | 111 | ASSERT(flags & (FWRITE | FREAD)); |
112 | ASSERT(seg == UIO_SYSSPACE); | |
113 | ASSERT(vpp); | |
4b171585 | 114 | *vpp = NULL; |
115 | ||
116 | if (!(flags & FCREAT) && (flags & FWRITE)) | |
117 | flags |= FEXCL; | |
118 | ||
728b9dd8 | 119 | /* Note for filp_open() the two low bits must be remapped to mean: |
120 | * 01 - read-only -> 00 read-only | |
121 | * 10 - write-only -> 01 write-only | |
122 | * 11 - read-write -> 10 read-write | |
123 | */ | |
124 | flags--; | |
0b3cf046 | 125 | |
126 | if (flags & FCREAT) | |
4b171585 | 127 | saved_umask = xchg(¤t->fs->umask, 0); |
0b3cf046 | 128 | |
4b171585 | 129 | fp = filp_open(path, flags, mode); |
0b3cf046 | 130 | |
131 | if (flags & FCREAT) | |
4b171585 | 132 | (void)xchg(¤t->fs->umask, saved_umask); |
0b3cf046 | 133 | |
4b171585 | 134 | if (IS_ERR(fp)) |
937879f1 | 135 | RETURN(-PTR_ERR(fp)); |
0b3cf046 | 136 | |
4b171585 | 137 | rc = vfs_getattr(fp->f_vfsmnt, fp->f_dentry, &stat); |
138 | if (rc) { | |
139 | filp_close(fp, 0); | |
937879f1 | 140 | RETURN(-rc); |
0b3cf046 | 141 | } |
142 | ||
af828292 | 143 | vp = vn_alloc(KM_SLEEP); |
4b171585 | 144 | if (!vp) { |
145 | filp_close(fp, 0); | |
937879f1 | 146 | RETURN(ENOMEM); |
4b171585 | 147 | } |
0b3cf046 | 148 | |
e4f1d29f | 149 | mutex_enter(&vp->v_lock); |
4b171585 | 150 | vp->v_type = vn_get_sol_type(stat.mode); |
e4f1d29f | 151 | vp->v_file = fp; |
4b171585 | 152 | *vpp = vp; |
e4f1d29f | 153 | mutex_exit(&vp->v_lock); |
0b3cf046 | 154 | |
937879f1 | 155 | RETURN(0); |
4b171585 | 156 | } /* vn_open() */ |
157 | EXPORT_SYMBOL(vn_open); | |
0b3cf046 | 158 | |
0b3cf046 | 159 | int |
af828292 | 160 | vn_openat(const char *path, uio_seg_t seg, int flags, int mode, |
4b171585 | 161 | vnode_t **vpp, int x1, void *x2, vnode_t *vp, int fd) |
0b3cf046 | 162 | { |
4b171585 | 163 | char *realpath; |
12018327 | 164 | int len, rc; |
937879f1 | 165 | ENTRY; |
0b3cf046 | 166 | |
937879f1 | 167 | ASSERT(vp == rootdir); |
0b3cf046 | 168 | |
12018327 | 169 | len = strlen(path) + 2; |
170 | realpath = kmalloc(len, GFP_KERNEL); | |
4b171585 | 171 | if (!realpath) |
937879f1 | 172 | RETURN(ENOMEM); |
0b3cf046 | 173 | |
12018327 | 174 | (void)snprintf(realpath, len, "/%s", path); |
4b171585 | 175 | rc = vn_open(realpath, seg, flags, mode, vpp, x1, x2); |
4b171585 | 176 | kfree(realpath); |
177 | ||
937879f1 | 178 | RETURN(rc); |
4b171585 | 179 | } /* vn_openat() */ |
180 | EXPORT_SYMBOL(vn_openat); | |
0b3cf046 | 181 | |
0b3cf046 | 182 | int |
4b171585 | 183 | vn_rdwr(uio_rw_t uio, vnode_t *vp, void *addr, ssize_t len, offset_t off, |
af828292 | 184 | uio_seg_t seg, int x1, rlim64_t x2, void *x3, ssize_t *residp) |
0b3cf046 | 185 | { |
4b171585 | 186 | loff_t offset; |
187 | mm_segment_t saved_fs; | |
188 | struct file *fp; | |
189 | int rc; | |
937879f1 | 190 | ENTRY; |
4b171585 | 191 | |
937879f1 | 192 | ASSERT(uio == UIO_WRITE || uio == UIO_READ); |
193 | ASSERT(vp); | |
194 | ASSERT(vp->v_file); | |
195 | ASSERT(seg == UIO_SYSSPACE); | |
196 | ASSERT(x1 == 0); | |
197 | ASSERT(x2 == RLIM64_INFINITY); | |
4b171585 | 198 | |
199 | offset = off; | |
e4f1d29f | 200 | fp = vp->v_file; |
4b171585 | 201 | |
202 | /* Writable user data segment must be briefly increased for this | |
203 | * process so we can use the user space read call paths to write | |
204 | * in to memory allocated by the kernel. */ | |
205 | saved_fs = get_fs(); | |
206 | set_fs(get_ds()); | |
207 | ||
208 | if (uio & UIO_WRITE) | |
209 | rc = vfs_write(fp, addr, len, &offset); | |
210 | else | |
211 | rc = vfs_read(fp, addr, len, &offset); | |
212 | ||
213 | set_fs(saved_fs); | |
214 | ||
215 | if (rc < 0) | |
937879f1 | 216 | RETURN(-rc); |
0b3cf046 | 217 | |
4b171585 | 218 | if (residp) { |
219 | *residp = len - rc; | |
0b3cf046 | 220 | } else { |
4b171585 | 221 | if (rc != len) |
937879f1 | 222 | RETURN(EIO); |
0b3cf046 | 223 | } |
224 | ||
937879f1 | 225 | RETURN(0); |
4b171585 | 226 | } /* vn_rdwr() */ |
227 | EXPORT_SYMBOL(vn_rdwr); | |
228 | ||
229 | int | |
2f5d55aa | 230 | vn_close(vnode_t *vp, int flags, int x1, int x2, void *x3, void *x4) |
4b171585 | 231 | { |
232 | int rc; | |
937879f1 | 233 | ENTRY; |
4b171585 | 234 | |
937879f1 | 235 | ASSERT(vp); |
236 | ASSERT(vp->v_file); | |
4b171585 | 237 | |
e4f1d29f | 238 | rc = filp_close(vp->v_file, 0); |
af828292 | 239 | vn_free(vp); |
4b171585 | 240 | |
937879f1 | 241 | RETURN(-rc); |
4b171585 | 242 | } /* vn_close() */ |
243 | EXPORT_SYMBOL(vn_close); | |
244 | ||
57d86234 | 245 | static struct dentry *vn_lookup_hash(struct nameidata *nd) |
4b171585 | 246 | { |
57d86234 | 247 | return lookup_one_len(nd->last.name, nd->nd_dentry, nd->last.len); |
4b171585 | 248 | } /* lookup_hash() */ |
249 | ||
57d86234 | 250 | static void vn_path_release(struct nameidata *nd) |
251 | { | |
252 | dput(nd->nd_dentry); | |
253 | mntput(nd->nd_mnt); | |
254 | } | |
255 | ||
4b171585 | 256 | /* Modified do_unlinkat() from linux/fs/namei.c, only uses exported symbols */ |
257 | int | |
af828292 | 258 | vn_remove(const char *path, uio_seg_t seg, int flags) |
4b171585 | 259 | { |
260 | struct dentry *dentry; | |
261 | struct nameidata nd; | |
262 | struct inode *inode = NULL; | |
263 | int rc = 0; | |
3d061e9d | 264 | ENTRY; |
4b171585 | 265 | |
3d061e9d | 266 | ASSERT(seg == UIO_SYSSPACE); |
267 | ASSERT(flags == RMFILE); | |
2f5d55aa | 268 | |
4b171585 | 269 | rc = path_lookup(path, LOOKUP_PARENT, &nd); |
270 | if (rc) | |
937879f1 | 271 | GOTO(exit, rc); |
4b171585 | 272 | |
273 | rc = -EISDIR; | |
274 | if (nd.last_type != LAST_NORM) | |
937879f1 | 275 | GOTO(exit1, rc); |
4b171585 | 276 | |
3d061e9d | 277 | #ifdef HAVE_INODE_I_MUTEX |
57d86234 | 278 | mutex_lock_nested(&nd.nd_dentry->d_inode->i_mutex, I_MUTEX_PARENT); |
3d061e9d | 279 | #else |
280 | down(&nd.nd_dentry->d_inode->i_sem); | |
281 | #endif | |
57d86234 | 282 | dentry = vn_lookup_hash(&nd); |
4b171585 | 283 | rc = PTR_ERR(dentry); |
284 | if (!IS_ERR(dentry)) { | |
285 | /* Why not before? Because we want correct rc value */ | |
286 | if (nd.last.name[nd.last.len]) | |
937879f1 | 287 | GOTO(slashes, rc); |
288 | ||
4b171585 | 289 | inode = dentry->d_inode; |
290 | if (inode) | |
291 | atomic_inc(&inode->i_count); | |
57d86234 | 292 | rc = vfs_unlink(nd.nd_dentry->d_inode, dentry); |
4b171585 | 293 | exit2: |
294 | dput(dentry); | |
295 | } | |
3d061e9d | 296 | #ifdef HAVE_INODE_I_MUTEX |
57d86234 | 297 | mutex_unlock(&nd.nd_dentry->d_inode->i_mutex); |
3d061e9d | 298 | #else |
299 | up(&nd.nd_dentry->d_inode->i_sem); | |
300 | #endif | |
4b171585 | 301 | if (inode) |
302 | iput(inode); /* truncate the inode here */ | |
303 | exit1: | |
57d86234 | 304 | vn_path_release(&nd); |
4b171585 | 305 | exit: |
937879f1 | 306 | RETURN(-rc); |
4b171585 | 307 | |
308 | slashes: | |
309 | rc = !dentry->d_inode ? -ENOENT : | |
310 | S_ISDIR(dentry->d_inode->i_mode) ? -EISDIR : -ENOTDIR; | |
937879f1 | 311 | GOTO(exit2, rc); |
4b171585 | 312 | } /* vn_remove() */ |
313 | EXPORT_SYMBOL(vn_remove); | |
314 | ||
315 | /* Modified do_rename() from linux/fs/namei.c, only uses exported symbols */ | |
316 | int | |
317 | vn_rename(const char *oldname, const char *newname, int x1) | |
318 | { | |
319 | struct dentry * old_dir, * new_dir; | |
320 | struct dentry * old_dentry, *new_dentry; | |
321 | struct dentry * trap; | |
322 | struct nameidata oldnd, newnd; | |
323 | int rc = 0; | |
937879f1 | 324 | ENTRY; |
4b171585 | 325 | |
326 | rc = path_lookup(oldname, LOOKUP_PARENT, &oldnd); | |
327 | if (rc) | |
937879f1 | 328 | GOTO(exit, rc); |
4b171585 | 329 | |
330 | rc = path_lookup(newname, LOOKUP_PARENT, &newnd); | |
331 | if (rc) | |
937879f1 | 332 | GOTO(exit1, rc); |
4b171585 | 333 | |
334 | rc = -EXDEV; | |
57d86234 | 335 | if (oldnd.nd_mnt != newnd.nd_mnt) |
937879f1 | 336 | GOTO(exit2, rc); |
4b171585 | 337 | |
57d86234 | 338 | old_dir = oldnd.nd_dentry; |
4b171585 | 339 | rc = -EBUSY; |
340 | if (oldnd.last_type != LAST_NORM) | |
937879f1 | 341 | GOTO(exit2, rc); |
4b171585 | 342 | |
57d86234 | 343 | new_dir = newnd.nd_dentry; |
4b171585 | 344 | if (newnd.last_type != LAST_NORM) |
937879f1 | 345 | GOTO(exit2, rc); |
4b171585 | 346 | |
347 | trap = lock_rename(new_dir, old_dir); | |
348 | ||
57d86234 | 349 | old_dentry = vn_lookup_hash(&oldnd); |
4b171585 | 350 | |
351 | rc = PTR_ERR(old_dentry); | |
352 | if (IS_ERR(old_dentry)) | |
937879f1 | 353 | GOTO(exit3, rc); |
4b171585 | 354 | |
355 | /* source must exist */ | |
356 | rc = -ENOENT; | |
357 | if (!old_dentry->d_inode) | |
937879f1 | 358 | GOTO(exit4, rc); |
4b171585 | 359 | |
360 | /* unless the source is a directory trailing slashes give -ENOTDIR */ | |
361 | if (!S_ISDIR(old_dentry->d_inode->i_mode)) { | |
362 | rc = -ENOTDIR; | |
363 | if (oldnd.last.name[oldnd.last.len]) | |
937879f1 | 364 | GOTO(exit4, rc); |
4b171585 | 365 | if (newnd.last.name[newnd.last.len]) |
937879f1 | 366 | GOTO(exit4, rc); |
4b171585 | 367 | } |
368 | ||
369 | /* source should not be ancestor of target */ | |
370 | rc = -EINVAL; | |
371 | if (old_dentry == trap) | |
937879f1 | 372 | GOTO(exit4, rc); |
4b171585 | 373 | |
57d86234 | 374 | new_dentry = vn_lookup_hash(&newnd); |
4b171585 | 375 | rc = PTR_ERR(new_dentry); |
376 | if (IS_ERR(new_dentry)) | |
937879f1 | 377 | GOTO(exit4, rc); |
4b171585 | 378 | |
379 | /* target should not be an ancestor of source */ | |
380 | rc = -ENOTEMPTY; | |
381 | if (new_dentry == trap) | |
937879f1 | 382 | GOTO(exit5, rc); |
4b171585 | 383 | |
384 | rc = vfs_rename(old_dir->d_inode, old_dentry, | |
385 | new_dir->d_inode, new_dentry); | |
386 | exit5: | |
387 | dput(new_dentry); | |
388 | exit4: | |
389 | dput(old_dentry); | |
390 | exit3: | |
391 | unlock_rename(new_dir, old_dir); | |
392 | exit2: | |
57d86234 | 393 | vn_path_release(&newnd); |
4b171585 | 394 | exit1: |
57d86234 | 395 | vn_path_release(&oldnd); |
4b171585 | 396 | exit: |
937879f1 | 397 | RETURN(-rc); |
0b3cf046 | 398 | } |
4b171585 | 399 | EXPORT_SYMBOL(vn_rename); |
0b3cf046 | 400 | |
4b171585 | 401 | int |
36e6f861 | 402 | vn_getattr(vnode_t *vp, vattr_t *vap, int flags, void *x3, void *x4) |
0b3cf046 | 403 | { |
4b171585 | 404 | struct file *fp; |
405 | struct kstat stat; | |
406 | int rc; | |
937879f1 | 407 | ENTRY; |
4b171585 | 408 | |
937879f1 | 409 | ASSERT(vp); |
410 | ASSERT(vp->v_file); | |
411 | ASSERT(vap); | |
4b171585 | 412 | |
e4f1d29f | 413 | fp = vp->v_file; |
4b171585 | 414 | |
415 | rc = vfs_getattr(fp->f_vfsmnt, fp->f_dentry, &stat); | |
416 | if (rc) | |
937879f1 | 417 | RETURN(-rc); |
4b171585 | 418 | |
419 | vap->va_type = vn_get_sol_type(stat.mode); | |
420 | vap->va_mode = stat.mode; | |
421 | vap->va_uid = stat.uid; | |
422 | vap->va_gid = stat.gid; | |
423 | vap->va_fsid = 0; | |
424 | vap->va_nodeid = stat.ino; | |
425 | vap->va_nlink = stat.nlink; | |
426 | vap->va_size = stat.size; | |
427 | vap->va_blocksize = stat.blksize; | |
428 | vap->va_atime.tv_sec = stat.atime.tv_sec; | |
429 | vap->va_atime.tv_usec = stat.atime.tv_nsec / NSEC_PER_USEC; | |
430 | vap->va_mtime.tv_sec = stat.mtime.tv_sec; | |
431 | vap->va_mtime.tv_usec = stat.mtime.tv_nsec / NSEC_PER_USEC; | |
432 | vap->va_ctime.tv_sec = stat.ctime.tv_sec; | |
433 | vap->va_ctime.tv_usec = stat.ctime.tv_nsec / NSEC_PER_USEC; | |
434 | vap->va_rdev = stat.rdev; | |
435 | vap->va_blocks = stat.blocks; | |
436 | ||
937879f1 | 437 | RETURN(0); |
0b3cf046 | 438 | } |
4b171585 | 439 | EXPORT_SYMBOL(vn_getattr); |
440 | ||
2f5d55aa | 441 | int vn_fsync(vnode_t *vp, int flags, void *x3, void *x4) |
4b171585 | 442 | { |
36e6f861 | 443 | int datasync = 0; |
937879f1 | 444 | ENTRY; |
36e6f861 | 445 | |
937879f1 | 446 | ASSERT(vp); |
447 | ASSERT(vp->v_file); | |
4b171585 | 448 | |
36e6f861 | 449 | if (flags & FDSYNC) |
450 | datasync = 1; | |
451 | ||
937879f1 | 452 | RETURN(-file_fsync(vp->v_file, vp->v_file->f_dentry, datasync)); |
4b171585 | 453 | } /* vn_fsync() */ |
454 | EXPORT_SYMBOL(vn_fsync); | |
af828292 | 455 | |
e4f1d29f | 456 | /* Function must be called while holding the vn_file_lock */ |
457 | static file_t * | |
458 | file_find(int fd) | |
459 | { | |
460 | file_t *fp; | |
461 | ||
937879f1 | 462 | ASSERT(spin_is_locked(&vn_file_lock)); |
e4f1d29f | 463 | |
464 | list_for_each_entry(fp, &vn_file_list, f_list) { | |
465 | if (fd == fp->f_fd) { | |
937879f1 | 466 | ASSERT(atomic_read(&fp->f_ref) != 0); |
e4f1d29f | 467 | return fp; |
468 | } | |
469 | } | |
470 | ||
471 | return NULL; | |
472 | } /* file_find() */ | |
473 | ||
474 | file_t * | |
475 | vn_getf(int fd) | |
476 | { | |
477 | struct kstat stat; | |
478 | struct file *lfp; | |
479 | file_t *fp; | |
480 | vnode_t *vp; | |
937879f1 | 481 | int rc = 0; |
482 | ENTRY; | |
e4f1d29f | 483 | |
484 | /* Already open just take an extra reference */ | |
485 | spin_lock(&vn_file_lock); | |
486 | ||
487 | fp = file_find(fd); | |
488 | if (fp) { | |
489 | atomic_inc(&fp->f_ref); | |
490 | spin_unlock(&vn_file_lock); | |
937879f1 | 491 | RETURN(fp); |
e4f1d29f | 492 | } |
493 | ||
494 | spin_unlock(&vn_file_lock); | |
495 | ||
496 | /* File was not yet opened create the object and setup */ | |
4afaaefa | 497 | fp = kmem_cache_alloc(vn_file_cache, KM_SLEEP); |
e4f1d29f | 498 | if (fp == NULL) |
937879f1 | 499 | GOTO(out, rc); |
e4f1d29f | 500 | |
501 | mutex_enter(&fp->f_lock); | |
502 | ||
503 | fp->f_fd = fd; | |
504 | fp->f_offset = 0; | |
505 | atomic_inc(&fp->f_ref); | |
506 | ||
507 | lfp = fget(fd); | |
508 | if (lfp == NULL) | |
937879f1 | 509 | GOTO(out_mutex, rc); |
e4f1d29f | 510 | |
511 | vp = vn_alloc(KM_SLEEP); | |
512 | if (vp == NULL) | |
937879f1 | 513 | GOTO(out_fget, rc); |
e4f1d29f | 514 | |
515 | if (vfs_getattr(lfp->f_vfsmnt, lfp->f_dentry, &stat)) | |
937879f1 | 516 | GOTO(out_vnode, rc); |
e4f1d29f | 517 | |
518 | mutex_enter(&vp->v_lock); | |
519 | vp->v_type = vn_get_sol_type(stat.mode); | |
520 | vp->v_file = lfp; | |
521 | mutex_exit(&vp->v_lock); | |
522 | ||
523 | fp->f_vnode = vp; | |
524 | fp->f_file = lfp; | |
525 | ||
526 | /* Put it on the tracking list */ | |
527 | spin_lock(&vn_file_lock); | |
528 | list_add(&fp->f_list, &vn_file_list); | |
529 | spin_unlock(&vn_file_lock); | |
530 | ||
531 | mutex_exit(&fp->f_lock); | |
937879f1 | 532 | RETURN(fp); |
e4f1d29f | 533 | |
534 | out_vnode: | |
e4f1d29f | 535 | vn_free(vp); |
536 | out_fget: | |
e4f1d29f | 537 | fput(lfp); |
538 | out_mutex: | |
e4f1d29f | 539 | mutex_exit(&fp->f_lock); |
540 | kmem_cache_free(vn_file_cache, fp); | |
541 | out: | |
937879f1 | 542 | RETURN(NULL); |
e4f1d29f | 543 | } /* getf() */ |
544 | EXPORT_SYMBOL(getf); | |
545 | ||
546 | static void releasef_locked(file_t *fp) | |
547 | { | |
937879f1 | 548 | ASSERT(fp->f_file); |
549 | ASSERT(fp->f_vnode); | |
e4f1d29f | 550 | |
551 | /* Unlinked from list, no refs, safe to free outside mutex */ | |
552 | fput(fp->f_file); | |
553 | vn_free(fp->f_vnode); | |
554 | ||
555 | kmem_cache_free(vn_file_cache, fp); | |
556 | } | |
557 | ||
558 | void | |
559 | vn_releasef(int fd) | |
560 | { | |
561 | file_t *fp; | |
937879f1 | 562 | ENTRY; |
e4f1d29f | 563 | |
564 | spin_lock(&vn_file_lock); | |
565 | fp = file_find(fd); | |
566 | if (fp) { | |
567 | atomic_dec(&fp->f_ref); | |
568 | if (atomic_read(&fp->f_ref) > 0) { | |
569 | spin_unlock(&vn_file_lock); | |
937879f1 | 570 | EXIT; |
e4f1d29f | 571 | return; |
572 | } | |
573 | ||
574 | list_del(&fp->f_list); | |
575 | releasef_locked(fp); | |
576 | } | |
577 | spin_unlock(&vn_file_lock); | |
578 | ||
937879f1 | 579 | EXIT; |
e4f1d29f | 580 | return; |
581 | } /* releasef() */ | |
582 | EXPORT_SYMBOL(releasef); | |
583 | ||
af828292 | 584 | static int |
585 | vn_cache_constructor(void *buf, void *cdrarg, int kmflags) | |
586 | { | |
587 | struct vnode *vp = buf; | |
588 | ||
589 | mutex_init(&vp->v_lock, NULL, MUTEX_DEFAULT, NULL); | |
590 | ||
591 | return (0); | |
592 | } /* vn_cache_constructor() */ | |
593 | ||
594 | static void | |
595 | vn_cache_destructor(void *buf, void *cdrarg) | |
596 | { | |
597 | struct vnode *vp = buf; | |
598 | ||
599 | mutex_destroy(&vp->v_lock); | |
600 | } /* vn_cache_destructor() */ | |
601 | ||
e4f1d29f | 602 | static int |
603 | vn_file_cache_constructor(void *buf, void *cdrarg, int kmflags) | |
604 | { | |
605 | file_t *fp = buf; | |
606 | ||
607 | atomic_set(&fp->f_ref, 0); | |
608 | mutex_init(&fp->f_lock, NULL, MUTEX_DEFAULT, NULL); | |
4e62fd41 | 609 | INIT_LIST_HEAD(&fp->f_list); |
e4f1d29f | 610 | |
611 | return (0); | |
612 | } /* file_cache_constructor() */ | |
613 | ||
614 | static void | |
615 | vn_file_cache_destructor(void *buf, void *cdrarg) | |
616 | { | |
617 | file_t *fp = buf; | |
618 | ||
619 | mutex_destroy(&fp->f_lock); | |
620 | } /* vn_file_cache_destructor() */ | |
621 | ||
af828292 | 622 | int |
623 | vn_init(void) | |
624 | { | |
937879f1 | 625 | ENTRY; |
57d86234 | 626 | vn_cache = kmem_cache_create("spl_vn_cache", |
627 | sizeof(struct vnode), 64, | |
5d86345d | 628 | vn_cache_constructor, |
629 | vn_cache_destructor, | |
af828292 | 630 | NULL, NULL, NULL, 0); |
e4f1d29f | 631 | |
632 | vn_file_cache = kmem_cache_create("spl_vn_file_cache", | |
633 | sizeof(file_t), 64, | |
634 | vn_file_cache_constructor, | |
635 | vn_file_cache_destructor, | |
636 | NULL, NULL, NULL, 0); | |
937879f1 | 637 | RETURN(0); |
af828292 | 638 | } /* vn_init() */ |
639 | ||
640 | void | |
641 | vn_fini(void) | |
642 | { | |
e4f1d29f | 643 | file_t *fp, *next_fp; |
2fb9b26a | 644 | int leaked = 0; |
937879f1 | 645 | ENTRY; |
e4f1d29f | 646 | |
647 | spin_lock(&vn_file_lock); | |
648 | ||
649 | list_for_each_entry_safe(fp, next_fp, &vn_file_list, f_list) { | |
650 | list_del(&fp->f_list); | |
651 | releasef_locked(fp); | |
652 | leaked++; | |
653 | } | |
654 | ||
2fb9b26a | 655 | kmem_cache_destroy(vn_file_cache); |
e4f1d29f | 656 | vn_file_cache = NULL; |
657 | spin_unlock(&vn_file_lock); | |
658 | ||
659 | if (leaked > 0) | |
937879f1 | 660 | CWARN("Warning %d files leaked\n", leaked); |
e4f1d29f | 661 | |
2fb9b26a | 662 | kmem_cache_destroy(vn_cache); |
e4f1d29f | 663 | |
937879f1 | 664 | EXIT; |
e4f1d29f | 665 | return; |
af828292 | 666 | } /* vn_fini() */ |