ACPI: delete unnecessary EC console messages
[linux-2.6/verdex.git] / fs / coda / inode.c
blob04a73fb4848f443864574da3db2b9adcf18043fc
1 /*
2 * Super block/filesystem wide operations
4 * Copyright (C) 1996 Peter J. Braam <braam@maths.ox.ac.uk> and
5 * Michael Callahan <callahan@maths.ox.ac.uk>
6 *
7 * Rewritten for Linux 2.1. Peter Braam <braam@cs.cmu.edu>
8 * Copyright (C) Carnegie Mellon University
9 */
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/mm.h>
14 #include <linux/string.h>
15 #include <linux/stat.h>
16 #include <linux/errno.h>
17 #include <linux/unistd.h>
18 #include <linux/smp_lock.h>
19 #include <linux/file.h>
20 #include <linux/vfs.h>
22 #include <asm/system.h>
23 #include <asm/uaccess.h>
25 #include <linux/fs.h>
26 #include <linux/vmalloc.h>
28 #include <linux/coda.h>
29 #include <linux/coda_linux.h>
30 #include <linux/coda_psdev.h>
31 #include <linux/coda_fs_i.h>
32 #include <linux/coda_cache.h>
34 /* VFS super_block ops */
35 static void coda_clear_inode(struct inode *);
36 static void coda_put_super(struct super_block *);
37 static int coda_statfs(struct super_block *sb, struct kstatfs *buf);
39 static kmem_cache_t * coda_inode_cachep;
41 static struct inode *coda_alloc_inode(struct super_block *sb)
43 struct coda_inode_info *ei;
44 ei = (struct coda_inode_info *)kmem_cache_alloc(coda_inode_cachep, SLAB_KERNEL);
45 if (!ei)
46 return NULL;
47 memset(&ei->c_fid, 0, sizeof(struct CodaFid));
48 ei->c_flags = 0;
49 ei->c_uid = 0;
50 ei->c_cached_perm = 0;
51 return &ei->vfs_inode;
54 static void coda_destroy_inode(struct inode *inode)
56 kmem_cache_free(coda_inode_cachep, ITOC(inode));
59 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
61 struct coda_inode_info *ei = (struct coda_inode_info *) foo;
63 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
64 SLAB_CTOR_CONSTRUCTOR)
65 inode_init_once(&ei->vfs_inode);
68 int coda_init_inodecache(void)
70 coda_inode_cachep = kmem_cache_create("coda_inode_cache",
71 sizeof(struct coda_inode_info),
72 0, SLAB_RECLAIM_ACCOUNT,
73 init_once, NULL);
74 if (coda_inode_cachep == NULL)
75 return -ENOMEM;
76 return 0;
79 void coda_destroy_inodecache(void)
81 if (kmem_cache_destroy(coda_inode_cachep))
82 printk(KERN_INFO "coda_inode_cache: not all structures were freed\n");
85 static int coda_remount(struct super_block *sb, int *flags, char *data)
87 *flags |= MS_NODIRATIME;
88 return 0;
91 /* exported operations */
92 static struct super_operations coda_super_operations =
94 .alloc_inode = coda_alloc_inode,
95 .destroy_inode = coda_destroy_inode,
96 .clear_inode = coda_clear_inode,
97 .put_super = coda_put_super,
98 .statfs = coda_statfs,
99 .remount_fs = coda_remount,
102 static int get_device_index(struct coda_mount_data *data)
104 struct file *file;
105 struct inode *inode;
106 int idx;
108 if(data == NULL) {
109 printk("coda_read_super: Bad mount data\n");
110 return -1;
113 if(data->version != CODA_MOUNT_VERSION) {
114 printk("coda_read_super: Bad mount version\n");
115 return -1;
118 file = fget(data->fd);
119 inode = NULL;
120 if(file)
121 inode = file->f_dentry->d_inode;
123 if(!inode || !S_ISCHR(inode->i_mode) ||
124 imajor(inode) != CODA_PSDEV_MAJOR) {
125 if(file)
126 fput(file);
128 printk("coda_read_super: Bad file\n");
129 return -1;
132 idx = iminor(inode);
133 fput(file);
135 if(idx < 0 || idx >= MAX_CODADEVS) {
136 printk("coda_read_super: Bad minor number\n");
137 return -1;
140 return idx;
143 static int coda_fill_super(struct super_block *sb, void *data, int silent)
145 struct inode *root = NULL;
146 struct coda_sb_info *sbi = NULL;
147 struct venus_comm *vc = NULL;
148 struct CodaFid fid;
149 int error;
150 int idx;
152 idx = get_device_index((struct coda_mount_data *) data);
154 /* Ignore errors in data, for backward compatibility */
155 if(idx == -1)
156 idx = 0;
158 printk(KERN_INFO "coda_read_super: device index: %i\n", idx);
160 vc = &coda_comms[idx];
161 if (!vc->vc_inuse) {
162 printk("coda_read_super: No pseudo device\n");
163 return -EINVAL;
166 if ( vc->vc_sb ) {
167 printk("coda_read_super: Device already mounted\n");
168 return -EBUSY;
171 sbi = kmalloc(sizeof(struct coda_sb_info), GFP_KERNEL);
172 if(!sbi) {
173 return -ENOMEM;
176 vc->vc_sb = sb;
178 sbi->sbi_vcomm = vc;
180 sb->s_fs_info = sbi;
181 sb->s_flags |= MS_NODIRATIME; /* probably even noatime */
182 sb->s_blocksize = 1024; /* XXXXX what do we put here?? */
183 sb->s_blocksize_bits = 10;
184 sb->s_magic = CODA_SUPER_MAGIC;
185 sb->s_op = &coda_super_operations;
187 /* get root fid from Venus: this needs the root inode */
188 error = venus_rootfid(sb, &fid);
189 if ( error ) {
190 printk("coda_read_super: coda_get_rootfid failed with %d\n",
191 error);
192 goto error;
194 printk("coda_read_super: rootfid is %s\n", coda_f2s(&fid));
196 /* make root inode */
197 error = coda_cnode_make(&root, &fid, sb);
198 if ( error || !root ) {
199 printk("Failure of coda_cnode_make for root: error %d\n", error);
200 goto error;
203 printk("coda_read_super: rootinode is %ld dev %s\n",
204 root->i_ino, root->i_sb->s_id);
205 sb->s_root = d_alloc_root(root);
206 if (!sb->s_root)
207 goto error;
208 return 0;
210 error:
211 if (sbi) {
212 kfree(sbi);
213 if(vc)
214 vc->vc_sb = NULL;
216 if (root)
217 iput(root);
219 return -EINVAL;
222 static void coda_put_super(struct super_block *sb)
224 struct coda_sb_info *sbi;
226 sbi = coda_sbp(sb);
227 sbi->sbi_vcomm->vc_sb = NULL;
229 printk("Coda: Bye bye.\n");
230 kfree(sbi);
233 static void coda_clear_inode(struct inode *inode)
235 coda_cache_clear_inode(inode);
238 int coda_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
240 int err = coda_revalidate_inode(dentry);
241 if (!err)
242 generic_fillattr(dentry->d_inode, stat);
243 return err;
246 int coda_setattr(struct dentry *de, struct iattr *iattr)
248 struct inode *inode = de->d_inode;
249 struct coda_vattr vattr;
250 int error;
252 lock_kernel();
254 memset(&vattr, 0, sizeof(vattr));
256 inode->i_ctime = CURRENT_TIME_SEC;
257 coda_iattr_to_vattr(iattr, &vattr);
258 vattr.va_type = C_VNON; /* cannot set type */
260 /* Venus is responsible for truncating the container-file!!! */
261 error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr);
263 if ( !error ) {
264 coda_vattr_to_iattr(inode, &vattr);
265 coda_cache_clear_inode(inode);
268 unlock_kernel();
270 return error;
273 struct inode_operations coda_file_inode_operations = {
274 .permission = coda_permission,
275 .getattr = coda_getattr,
276 .setattr = coda_setattr,
279 static int coda_statfs(struct super_block *sb, struct kstatfs *buf)
281 int error;
283 lock_kernel();
285 error = venus_statfs(sb, buf);
287 unlock_kernel();
289 if (error) {
290 /* fake something like AFS does */
291 buf->f_blocks = 9000000;
292 buf->f_bfree = 9000000;
293 buf->f_bavail = 9000000;
294 buf->f_files = 9000000;
295 buf->f_ffree = 9000000;
298 /* and fill in the rest */
299 buf->f_type = CODA_SUPER_MAGIC;
300 buf->f_bsize = 1024;
301 buf->f_namelen = CODA_MAXNAMLEN;
303 return 0;
306 /* init_coda: used by filesystems.c to register coda */
308 static struct super_block *coda_get_sb(struct file_system_type *fs_type,
309 int flags, const char *dev_name, void *data)
311 return get_sb_nodev(fs_type, flags, data, coda_fill_super);
314 struct file_system_type coda_fs_type = {
315 .owner = THIS_MODULE,
316 .name = "coda",
317 .get_sb = coda_get_sb,
318 .kill_sb = kill_anon_super,
319 .fs_flags = FS_BINARY_MOUNTDATA,