4 * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
5 * Copyright (C) 1997 by Volker Lendecke
7 * Please add a note about your changes to smbfs in the ChangeLog file.
10 #include <linux/module.h>
11 #include <linux/time.h>
12 #include <linux/kernel.h>
14 #include <linux/string.h>
15 #include <linux/stat.h>
16 #include <linux/errno.h>
17 #include <linux/slab.h>
18 #include <linux/init.h>
19 #include <linux/file.h>
20 #include <linux/dcache.h>
21 #include <linux/smp_lock.h>
22 #include <linux/nls.h>
23 #include <linux/seq_file.h>
24 #include <linux/mount.h>
25 #include <linux/net.h>
26 #include <linux/vfs.h>
27 #include <linux/highuid.h>
28 #include <linux/smb_fs.h>
29 #include <linux/smbno.h>
30 #include <linux/smb_mount.h>
32 #include <asm/system.h>
33 #include <asm/uaccess.h>
35 #include "smb_debug.h"
39 /* Always pick a default string */
40 #ifdef CONFIG_SMB_NLS_REMOTE
41 #define SMB_NLS_REMOTE CONFIG_SMB_NLS_REMOTE
43 #define SMB_NLS_REMOTE ""
46 #define SMB_TTL_DEFAULT 1000
48 static void smb_delete_inode(struct inode *);
49 static void smb_put_super(struct super_block *);
50 static int smb_statfs(struct dentry *, struct kstatfs *);
51 static int smb_show_options(struct seq_file *, struct vfsmount *);
53 static kmem_cache_t *smb_inode_cachep;
55 static struct inode *smb_alloc_inode(struct super_block *sb)
57 struct smb_inode_info *ei;
58 ei = (struct smb_inode_info *)kmem_cache_alloc(smb_inode_cachep, SLAB_KERNEL);
61 return &ei->vfs_inode;
64 static void smb_destroy_inode(struct inode *inode)
66 kmem_cache_free(smb_inode_cachep, SMB_I(inode));
69 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
71 struct smb_inode_info *ei = (struct smb_inode_info *) foo;
72 unsigned long flagmask = SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR;
74 if ((flags & flagmask) == SLAB_CTOR_CONSTRUCTOR)
75 inode_init_once(&ei->vfs_inode);
78 static int init_inodecache(void)
80 smb_inode_cachep = kmem_cache_create("smb_inode_cache",
81 sizeof(struct smb_inode_info),
82 0, (SLAB_RECLAIM_ACCOUNT|
85 if (smb_inode_cachep == NULL)
90 static void destroy_inodecache(void)
92 if (kmem_cache_destroy(smb_inode_cachep))
93 printk(KERN_INFO "smb_inode_cache: not all structures were freed\n");
96 static int smb_remount(struct super_block *sb, int *flags, char *data)
98 *flags |= MS_NODIRATIME;
102 static struct super_operations smb_sops =
104 .alloc_inode = smb_alloc_inode,
105 .destroy_inode = smb_destroy_inode,
106 .drop_inode = generic_delete_inode,
107 .delete_inode = smb_delete_inode,
108 .put_super = smb_put_super,
109 .statfs = smb_statfs,
110 .show_options = smb_show_options,
111 .remount_fs = smb_remount,
115 /* We are always generating a new inode here */
117 smb_iget(struct super_block *sb, struct smb_fattr *fattr)
119 struct smb_sb_info *server = SMB_SB(sb);
120 struct inode *result;
122 DEBUG1("smb_iget: %p\n", fattr);
124 result = new_inode(sb);
127 result->i_ino = fattr->f_ino;
128 SMB_I(result)->open = 0;
129 SMB_I(result)->fileid = 0;
130 SMB_I(result)->access = 0;
131 SMB_I(result)->flags = 0;
132 SMB_I(result)->closed = 0;
133 SMB_I(result)->openers = 0;
134 smb_set_inode_attr(result, fattr);
135 if (S_ISREG(result->i_mode)) {
136 result->i_op = &smb_file_inode_operations;
137 result->i_fop = &smb_file_operations;
138 result->i_data.a_ops = &smb_file_aops;
139 } else if (S_ISDIR(result->i_mode)) {
140 if (server->opt.capabilities & SMB_CAP_UNIX)
141 result->i_op = &smb_dir_inode_operations_unix;
143 result->i_op = &smb_dir_inode_operations;
144 result->i_fop = &smb_dir_operations;
145 } else if (S_ISLNK(result->i_mode)) {
146 result->i_op = &smb_link_inode_operations;
148 init_special_inode(result, result->i_mode, fattr->f_rdev);
150 insert_inode_hash(result);
155 * Copy the inode data to a smb_fattr structure.
158 smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr)
160 memset(fattr, 0, sizeof(struct smb_fattr));
161 fattr->f_mode = inode->i_mode;
162 fattr->f_nlink = inode->i_nlink;
163 fattr->f_ino = inode->i_ino;
164 fattr->f_uid = inode->i_uid;
165 fattr->f_gid = inode->i_gid;
166 fattr->f_size = inode->i_size;
167 fattr->f_mtime = inode->i_mtime;
168 fattr->f_ctime = inode->i_ctime;
169 fattr->f_atime = inode->i_atime;
170 fattr->f_blocks = inode->i_blocks;
172 fattr->attr = SMB_I(inode)->attr;
174 * Keep the attributes in sync with the inode permissions.
176 if (fattr->f_mode & S_IWUSR)
177 fattr->attr &= ~aRONLY;
179 fattr->attr |= aRONLY;
183 * Update the inode, possibly causing it to invalidate its pages if mtime/size
184 * is different from last time.
187 smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr)
189 struct smb_inode_info *ei = SMB_I(inode);
192 * A size change should have a different mtime, or same mtime
193 * but different size.
195 time_t last_time = inode->i_mtime.tv_sec;
196 loff_t last_sz = inode->i_size;
198 inode->i_mode = fattr->f_mode;
199 inode->i_nlink = fattr->f_nlink;
200 inode->i_uid = fattr->f_uid;
201 inode->i_gid = fattr->f_gid;
202 inode->i_ctime = fattr->f_ctime;
203 inode->i_blocks = fattr->f_blocks;
204 inode->i_size = fattr->f_size;
205 inode->i_mtime = fattr->f_mtime;
206 inode->i_atime = fattr->f_atime;
207 ei->attr = fattr->attr;
210 * Update the "last time refreshed" field for revalidation.
212 ei->oldmtime = jiffies;
214 if (inode->i_mtime.tv_sec != last_time || inode->i_size != last_sz) {
215 VERBOSE("%ld changed, old=%ld, new=%ld, oz=%ld, nz=%ld\n",
217 (long) last_time, (long) inode->i_mtime.tv_sec,
218 (long) last_sz, (long) inode->i_size);
220 if (!S_ISDIR(inode->i_mode))
221 invalidate_remote_inode(inode);
226 * This is called if the connection has gone bad ...
227 * try to kill off all the current inodes.
230 smb_invalidate_inodes(struct smb_sb_info *server)
233 shrink_dcache_sb(SB_of(server));
234 invalidate_inodes(SB_of(server));
238 * This is called to update the inode attributes after
239 * we've made changes to a file or directory.
242 smb_refresh_inode(struct dentry *dentry)
244 struct inode *inode = dentry->d_inode;
246 struct smb_fattr fattr;
248 error = smb_proc_getattr(dentry, &fattr);
250 smb_renew_times(dentry);
252 * Check whether the type part of the mode changed,
253 * and don't update the attributes if it did.
255 * And don't dick with the root inode
257 if (inode->i_ino == 2)
259 if (S_ISLNK(inode->i_mode))
260 return error; /* VFS will deal with it */
262 if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) {
263 smb_set_inode_attr(inode, &fattr);
266 * Big trouble! The inode has become a new object,
267 * so any operations attempted on it are invalid.
269 * To limit damage, mark the inode as bad so that
270 * subsequent lookup validations will fail.
272 PARANOIA("%s/%s changed mode, %07o to %07o\n",
274 inode->i_mode, fattr.f_mode);
276 fattr.f_mode = inode->i_mode; /* save mode */
277 make_bad_inode(inode);
278 inode->i_mode = fattr.f_mode; /* restore mode */
280 * No need to worry about unhashing the dentry: the
281 * lookup validation will see that the inode is bad.
282 * But we do want to invalidate the caches ...
284 if (!S_ISDIR(inode->i_mode))
285 invalidate_remote_inode(inode);
287 smb_invalid_dir_cache(inode);
295 * This is called when we want to check whether the inode
296 * has changed on the server. If it has changed, we must
297 * invalidate our local caches.
300 smb_revalidate_inode(struct dentry *dentry)
302 struct smb_sb_info *s = server_from_dentry(dentry);
303 struct inode *inode = dentry->d_inode;
306 DEBUG1("smb_revalidate_inode\n");
310 * Check whether we've recently refreshed the inode.
312 if (time_before(jiffies, SMB_I(inode)->oldmtime + SMB_MAX_AGE(s))) {
313 VERBOSE("up-to-date, ino=%ld, jiffies=%lu, oldtime=%lu\n",
314 inode->i_ino, jiffies, SMB_I(inode)->oldmtime);
318 error = smb_refresh_inode(dentry);
325 * This routine is called when i_nlink == 0 and i_count goes to 0.
326 * All blocking cleanup operations need to go here to avoid races.
329 smb_delete_inode(struct inode *ino)
331 DEBUG1("ino=%ld\n", ino->i_ino);
332 truncate_inode_pages(&ino->i_data, 0);
335 PARANOIA("could not close inode %ld\n", ino->i_ino);
340 static struct option opts[] = {
341 { "version", 0, 'v' },
342 { "win95", SMB_MOUNT_WIN95, 1 },
343 { "oldattr", SMB_MOUNT_OLDATTR, 1 },
344 { "dirattr", SMB_MOUNT_DIRATTR, 1 },
345 { "case", SMB_MOUNT_CASE, 1 },
348 { "file_mode", 0, 'f' },
349 { "dir_mode", 0, 'd' },
350 { "iocharset", 0, 'i' },
351 { "codepage", 0, 'c' },
357 parse_options(struct smb_mount_data_kernel *mnt, char *options)
366 while ( (c = smb_getopt("smbfs", &options, opts,
367 &optopt, &optarg, &flags, &value)) > 0) {
369 VERBOSE("'%s' -> '%s'\n", optopt, optarg ? optarg : "<none>");
372 /* got a "flag" option */
375 if (value != SMB_MOUNT_VERSION) {
376 printk ("smbfs: Bad mount version %ld, expected %d\n",
377 value, SMB_MOUNT_VERSION);
380 mnt->version = value;
384 flags |= SMB_MOUNT_UID;
388 flags |= SMB_MOUNT_GID;
391 mnt->file_mode = (value & S_IRWXUGO) | S_IFREG;
392 flags |= SMB_MOUNT_FMODE;
395 mnt->dir_mode = (value & S_IRWXUGO) | S_IFDIR;
396 flags |= SMB_MOUNT_DMODE;
399 strlcpy(mnt->codepage.local_name, optarg,
403 strlcpy(mnt->codepage.remote_name, optarg,
410 printk ("smbfs: Unrecognized mount option %s\n",
420 * smb_show_options() is for displaying mount options in /proc/mounts.
421 * It tries to avoid showing settings that were not changed from their
425 smb_show_options(struct seq_file *s, struct vfsmount *m)
427 struct smb_mount_data_kernel *mnt = SMB_SB(m->mnt_sb)->mnt;
430 for (i = 0; opts[i].name != NULL; i++)
431 if (mnt->flags & opts[i].flag)
432 seq_printf(s, ",%s", opts[i].name);
434 if (mnt->flags & SMB_MOUNT_UID)
435 seq_printf(s, ",uid=%d", mnt->uid);
436 if (mnt->flags & SMB_MOUNT_GID)
437 seq_printf(s, ",gid=%d", mnt->gid);
438 if (mnt->mounted_uid != 0)
439 seq_printf(s, ",mounted_uid=%d", mnt->mounted_uid);
442 * Defaults for file_mode and dir_mode are unknown to us; they
443 * depend on the current umask of the user doing the mount.
445 if (mnt->flags & SMB_MOUNT_FMODE)
446 seq_printf(s, ",file_mode=%04o", mnt->file_mode & S_IRWXUGO);
447 if (mnt->flags & SMB_MOUNT_DMODE)
448 seq_printf(s, ",dir_mode=%04o", mnt->dir_mode & S_IRWXUGO);
450 if (strcmp(mnt->codepage.local_name, CONFIG_NLS_DEFAULT))
451 seq_printf(s, ",iocharset=%s", mnt->codepage.local_name);
452 if (strcmp(mnt->codepage.remote_name, SMB_NLS_REMOTE))
453 seq_printf(s, ",codepage=%s", mnt->codepage.remote_name);
455 if (mnt->ttl != SMB_TTL_DEFAULT)
456 seq_printf(s, ",ttl=%d", mnt->ttl);
462 smb_unload_nls(struct smb_sb_info *server)
464 if (server->remote_nls) {
465 unload_nls(server->remote_nls);
466 server->remote_nls = NULL;
468 if (server->local_nls) {
469 unload_nls(server->local_nls);
470 server->local_nls = NULL;
475 smb_put_super(struct super_block *sb)
477 struct smb_sb_info *server = SMB_SB(sb);
479 smb_lock_server(server);
480 server->state = CONN_INVALID;
481 smbiod_unregister_server(server);
483 smb_close_socket(server);
485 if (server->conn_pid)
486 kill_proc(server->conn_pid, SIGTERM, 1);
489 smb_unload_nls(server);
490 sb->s_fs_info = NULL;
491 smb_unlock_server(server);
495 static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
497 struct smb_sb_info *server;
498 struct smb_mount_data_kernel *mnt;
499 struct smb_mount_data *oldmnt;
500 struct inode *root_inode;
501 struct smb_fattr root;
508 oldmnt = (struct smb_mount_data *) raw_data;
509 ver = oldmnt->version;
510 if (ver != SMB_MOUNT_OLDVERSION && cpu_to_be32(ver) != SMB_MOUNT_ASCII)
513 sb->s_flags |= MS_NODIRATIME;
514 sb->s_blocksize = 1024; /* Eh... Is this correct? */
515 sb->s_blocksize_bits = 10;
516 sb->s_magic = SMB_SUPER_MAGIC;
517 sb->s_op = &smb_sops;
518 sb->s_time_gran = 100;
520 server = kzalloc(sizeof(struct smb_sb_info), GFP_KERNEL);
523 sb->s_fs_info = server;
525 server->super_block = sb;
527 server->sock_file = NULL;
528 init_waitqueue_head(&server->conn_wq);
529 init_MUTEX(&server->sem);
530 INIT_LIST_HEAD(&server->entry);
531 INIT_LIST_HEAD(&server->xmitq);
532 INIT_LIST_HEAD(&server->recvq);
533 server->conn_error = 0;
534 server->conn_pid = 0;
535 server->state = CONN_INVALID; /* no connection yet */
536 server->generation = 0;
538 /* Allocate the global temp buffer and some superblock helper structs */
539 /* FIXME: move these to the smb_sb_info struct */
540 VERBOSE("alloc chunk = %d\n", sizeof(struct smb_ops) +
541 sizeof(struct smb_mount_data_kernel));
542 mem = kmalloc(sizeof(struct smb_ops) +
543 sizeof(struct smb_mount_data_kernel), GFP_KERNEL);
548 smb_install_null_ops(server->ops);
549 server->mnt = mem + sizeof(struct smb_ops);
551 /* Setup NLS stuff */
552 server->remote_nls = NULL;
553 server->local_nls = NULL;
557 memset(mnt, 0, sizeof(struct smb_mount_data_kernel));
558 strlcpy(mnt->codepage.local_name, CONFIG_NLS_DEFAULT,
560 strlcpy(mnt->codepage.remote_name, SMB_NLS_REMOTE,
563 mnt->ttl = SMB_TTL_DEFAULT;
564 if (ver == SMB_MOUNT_OLDVERSION) {
565 mnt->version = oldmnt->version;
567 SET_UID(mnt->uid, oldmnt->uid);
568 SET_GID(mnt->gid, oldmnt->gid);
570 mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG;
571 mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR;
573 mnt->flags = (oldmnt->file_mode >> 9) | SMB_MOUNT_UID |
574 SMB_MOUNT_GID | SMB_MOUNT_FMODE | SMB_MOUNT_DMODE;
576 mnt->file_mode = S_IRWXU | S_IRGRP | S_IXGRP |
577 S_IROTH | S_IXOTH | S_IFREG;
578 mnt->dir_mode = S_IRWXU | S_IRGRP | S_IXGRP |
579 S_IROTH | S_IXOTH | S_IFDIR;
580 if (parse_options(mnt, raw_data))
583 mnt->mounted_uid = current->uid;
584 smb_setcodepage(server, &mnt->codepage);
587 * Display the enabled options
588 * Note: smb_proc_getattr uses these in 2.4 (but was changed in 2.2)
590 if (mnt->flags & SMB_MOUNT_OLDATTR)
591 printk("SMBFS: Using core getattr (Win 95 speedup)\n");
592 else if (mnt->flags & SMB_MOUNT_DIRATTR)
593 printk("SMBFS: Using dir ff getattr\n");
595 if (smbiod_register_server(server) < 0) {
596 printk(KERN_ERR "smbfs: failed to start smbiod\n");
601 * Keep the super block locked while we get the root inode.
603 smb_init_root_dirent(server, &root, sb);
604 root_inode = smb_iget(sb, &root);
608 sb->s_root = d_alloc_root(root_inode);
612 smb_new_dentry(sb->s_root);
619 smb_unload_nls(server);
624 printk(KERN_ERR "smb_fill_super: allocation failure\n");
625 sb->s_fs_info = NULL;
629 printk(KERN_ERR "smbfs: mount_data version %d is not supported\n", ver);
632 printk(KERN_ERR "smb_fill_super: missing data argument\n");
636 printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
641 smb_statfs(struct dentry *dentry, struct kstatfs *buf)
647 result = smb_proc_dskattr(dentry, buf);
651 buf->f_type = SMB_SUPER_MAGIC;
652 buf->f_namelen = SMB_MAXPATHLEN;
656 int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
658 int err = smb_revalidate_inode(dentry);
660 generic_fillattr(dentry->d_inode, stat);
665 smb_notify_change(struct dentry *dentry, struct iattr *attr)
667 struct inode *inode = dentry->d_inode;
668 struct smb_sb_info *server = server_from_dentry(dentry);
669 unsigned int mask = (S_IFREG | S_IFDIR | S_IRWXUGO);
670 int error, changed, refresh = 0;
671 struct smb_fattr fattr;
675 error = smb_revalidate_inode(dentry);
679 if ((error = inode_change_ok(inode, attr)) < 0)
683 if ((attr->ia_valid & ATTR_UID) && (attr->ia_uid != server->mnt->uid))
686 if ((attr->ia_valid & ATTR_GID) && (attr->ia_uid != server->mnt->gid))
689 if ((attr->ia_valid & ATTR_MODE) && (attr->ia_mode & ~mask))
692 if ((attr->ia_valid & ATTR_SIZE) != 0) {
693 VERBOSE("changing %s/%s, old size=%ld, new size=%ld\n",
695 (long) inode->i_size, (long) attr->ia_size);
697 filemap_write_and_wait(inode->i_mapping);
699 error = smb_open(dentry, O_WRONLY);
702 error = server->ops->truncate(inode, attr->ia_size);
705 error = vmtruncate(inode, attr->ia_size);
711 if (server->opt.capabilities & SMB_CAP_UNIX) {
712 /* For now we don't want to set the size with setattr_unix */
713 attr->ia_valid &= ~ATTR_SIZE;
714 /* FIXME: only call if we actually want to set something? */
715 error = smb_proc_setattr_unix(dentry, attr, 0, 0);
723 * Initialize the fattr and check for changed fields.
724 * Note: CTIME under SMB is creation time rather than
725 * change time, so we don't attempt to change it.
727 smb_get_inode_attr(inode, &fattr);
730 if ((attr->ia_valid & ATTR_MTIME) != 0) {
731 fattr.f_mtime = attr->ia_mtime;
734 if ((attr->ia_valid & ATTR_ATIME) != 0) {
735 fattr.f_atime = attr->ia_atime;
736 /* Earlier protocols don't have an access time */
737 if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2)
741 error = smb_proc_settime(dentry, &fattr);
748 * Check for mode changes ... we're extremely limited in
749 * what can be set for SMB servers: just the read-only bit.
751 if ((attr->ia_valid & ATTR_MODE) != 0) {
752 VERBOSE("%s/%s mode change, old=%x, new=%x\n",
753 DENTRY_PATH(dentry), fattr.f_mode, attr->ia_mode);
755 if (attr->ia_mode & S_IWUSR) {
756 if (fattr.attr & aRONLY) {
757 fattr.attr &= ~aRONLY;
761 if (!(fattr.attr & aRONLY)) {
762 fattr.attr |= aRONLY;
767 error = smb_proc_setattr(dentry, &fattr);
777 smb_refresh_inode(dentry);
782 static int smb_get_sb(struct file_system_type *fs_type,
783 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
785 return get_sb_nodev(fs_type, flags, data, smb_fill_super, mnt);
788 static struct file_system_type smb_fs_type = {
789 .owner = THIS_MODULE,
791 .get_sb = smb_get_sb,
792 .kill_sb = kill_anon_super,
793 .fs_flags = FS_BINARY_MOUNTDATA,
796 static int __init init_smb_fs(void)
799 DEBUG1("registering ...\n");
801 err = init_inodecache();
804 err = smb_init_request_cache();
807 err = register_filesystem(&smb_fs_type);
812 smb_destroy_request_cache();
814 destroy_inodecache();
819 static void __exit exit_smb_fs(void)
821 DEBUG1("unregistering ...\n");
822 unregister_filesystem(&smb_fs_type);
823 smb_destroy_request_cache();
824 destroy_inodecache();
827 module_init(init_smb_fs)
828 module_exit(exit_smb_fs)
829 MODULE_LICENSE("GPL");