* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Authors: David Howells <dhowells@redhat.com>
- * David Woodhouse <dwmw2@redhat.com>
+ * David Woodhouse <dwmw2@infradead.org>
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
+#include <linux/smp_lock.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
+#include <linux/parser.h>
+#include <linux/statfs.h>
+#include <linux/sched.h>
#include "internal.h"
#define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */
-static void afs_i_init_once(void *foo, struct kmem_cache *cachep,
- unsigned long flags);
-
+static void afs_i_init_once(void *foo);
static int afs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name,
void *data, struct vfsmount *mnt);
-
static struct inode *afs_alloc_inode(struct super_block *sb);
-
static void afs_put_super(struct super_block *sb);
-
static void afs_destroy_inode(struct inode *inode);
+static int afs_statfs(struct dentry *dentry, struct kstatfs *buf);
struct file_system_type afs_fs_type = {
.owner = THIS_MODULE,
.name = "afs",
.get_sb = afs_get_sb,
.kill_sb = kill_anon_super,
- .fs_flags = FS_BINARY_MOUNTDATA,
+ .fs_flags = 0,
};
static const struct super_operations afs_super_ops = {
- .statfs = simple_statfs,
+ .statfs = afs_statfs,
.alloc_inode = afs_alloc_inode,
- .drop_inode = generic_delete_inode,
+ .write_inode = afs_write_inode,
.destroy_inode = afs_destroy_inode,
.clear_inode = afs_clear_inode,
- .umount_begin = afs_umount_begin,
.put_super = afs_put_super,
+ .show_options = generic_show_options,
};
static struct kmem_cache *afs_inode_cachep;
static atomic_t afs_count_active_inodes;
+enum {
+ afs_no_opt,
+ afs_opt_cell,
+ afs_opt_rwpath,
+ afs_opt_vol,
+};
+
+static const match_table_t afs_options_list = {
+ { afs_opt_cell, "cell=%s" },
+ { afs_opt_rwpath, "rwpath" },
+ { afs_opt_vol, "vol=%s" },
+ { afs_no_opt, NULL },
+};
+
/*
* initialise the filesystem
*/
sizeof(struct afs_vnode),
0,
SLAB_HWCACHE_ALIGN,
- afs_i_init_once,
- NULL);
+ afs_i_init_once);
if (!afs_inode_cachep) {
printk(KERN_NOTICE "kAFS: Failed to allocate inode cache\n");
return ret;
}
/*
- * check that an argument has a value
- */
-static int want_arg(char **_value, const char *option)
-{
- if (!_value || !*_value || !**_value) {
- printk(KERN_NOTICE "kAFS: %s: argument missing\n", option);
- return 0;
- }
- return 1;
-}
-
-/*
- * check that there's no subsequent value
- */
-static int want_no_value(char *const *_value, const char *option)
-{
- if (*_value && **_value) {
- printk(KERN_NOTICE "kAFS: %s: Invalid argument: %s\n",
- option, *_value);
- return 0;
- }
- return 1;
-}
-
-/*
* parse the mount options
* - this function has been shamelessly adapted from the ext3 fs which
* shamelessly adapted it from the msdos fs
char *options, const char **devname)
{
struct afs_cell *cell;
- char *key, *value;
- int ret;
+ substring_t args[MAX_OPT_ARGS];
+ char *p;
+ int token;
_enter("%s", options);
options[PAGE_SIZE - 1] = 0;
- ret = 0;
- while ((key = strsep(&options, ","))) {
- value = strchr(key, '=');
- if (value)
- *value++ = 0;
+ while ((p = strsep(&options, ","))) {
+ if (!*p)
+ continue;
- _debug("kAFS: KEY: %s, VAL:%s", key, value ?: "-");
-
- if (strcmp(key, "rwpath") == 0) {
- if (!want_no_value(&value, "rwpath"))
- return -EINVAL;
- params->rwpath = 1;
- } else if (strcmp(key, "vol") == 0) {
- if (!want_arg(&value, "vol"))
- return -EINVAL;
- *devname = value;
- } else if (strcmp(key, "cell") == 0) {
- if (!want_arg(&value, "cell"))
- return -EINVAL;
- cell = afs_cell_lookup(value, strlen(value));
+ token = match_token(p, afs_options_list, args);
+ switch (token) {
+ case afs_opt_cell:
+ cell = afs_cell_lookup(args[0].from,
+ args[0].to - args[0].from);
if (IS_ERR(cell))
return PTR_ERR(cell);
afs_put_cell(params->cell);
params->cell = cell;
- } else {
- printk("kAFS: Unknown mount option: '%s'\n", key);
- ret = -EINVAL;
- goto error;
+ break;
+
+ case afs_opt_rwpath:
+ params->rwpath = 1;
+ break;
+
+ case afs_opt_vol:
+ *devname = args[0].from;
+ break;
+
+ default:
+ printk(KERN_ERR "kAFS:"
+ " Unknown or invalid mount option: '%s'\n", p);
+ return -EINVAL;
}
}
- ret = 0;
-error:
- _leave(" = %d", ret);
- return ret;
+ _leave(" = 0");
+ return 0;
}
/*
fid.vid = as->volume->vid;
fid.vnode = 1;
fid.unique = 1;
- inode = afs_iget(sb, params->key, &fid);
+ inode = afs_iget(sb, params->key, &fid, NULL, NULL);
if (IS_ERR(inode))
goto error_inode;
/*
* get an AFS superblock
- * - TODO: don't use get_sb_nodev(), but rather call sget() directly
*/
static int afs_get_sb(struct file_system_type *fs_type,
int flags,
struct super_block *sb;
struct afs_volume *vol;
struct key *key;
+ char *new_opts = kstrdup(options, GFP_KERNEL);
int ret;
_enter(",,%s,%p", dev_name, options);
goto error;
}
-
ret = afs_parse_device_name(¶ms, dev_name);
if (ret < 0)
goto error;
sb->s_flags = flags;
ret = afs_fill_super(sb, ¶ms);
if (ret < 0) {
- up_write(&sb->s_umount);
- deactivate_super(sb);
+ deactivate_locked_super(sb);
goto error;
}
+ save_mount_options(sb, new_opts);
sb->s_flags |= MS_ACTIVE;
} else {
_debug("reuse");
simple_set_mnt(mnt, sb);
afs_put_volume(params.volume);
afs_put_cell(params.cell);
+ kfree(new_opts);
_leave(" = 0 [%p]", sb);
return 0;
afs_put_volume(params.volume);
afs_put_cell(params.cell);
key_put(params.key);
+ kfree(new_opts);
_leave(" = %d", ret);
return ret;
}
_enter("");
+ lock_kernel();
+
afs_put_volume(as->volume);
+ unlock_kernel();
+
_leave("");
}
/*
* initialise an inode cache slab element prior to any use
*/
-static void afs_i_init_once(void *_vnode, struct kmem_cache *cachep,
- unsigned long flags)
+static void afs_i_init_once(void *_vnode)
{
struct afs_vnode *vnode = _vnode;
- if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
- SLAB_CTOR_CONSTRUCTOR) {
- memset(vnode, 0, sizeof(*vnode));
- inode_init_once(&vnode->vfs_inode);
- init_waitqueue_head(&vnode->update_waitq);
- mutex_init(&vnode->permits_lock);
- spin_lock_init(&vnode->lock);
- INIT_WORK(&vnode->cb_broken_work, afs_broken_callback_work);
- mutex_init(&vnode->cb_broken_lock);
- }
+ memset(vnode, 0, sizeof(*vnode));
+ inode_init_once(&vnode->vfs_inode);
+ init_waitqueue_head(&vnode->update_waitq);
+ mutex_init(&vnode->permits_lock);
+ mutex_init(&vnode->validate_lock);
+ spin_lock_init(&vnode->writeback_lock);
+ spin_lock_init(&vnode->lock);
+ INIT_LIST_HEAD(&vnode->writebacks);
+ INIT_LIST_HEAD(&vnode->pending_locks);
+ INIT_LIST_HEAD(&vnode->granted_locks);
+ INIT_DELAYED_WORK(&vnode->lock_work, afs_lock_work);
+ INIT_WORK(&vnode->cb_broken_work, afs_broken_callback_work);
}
/*
vnode->volume = NULL;
vnode->update_cnt = 0;
- vnode->flags = 0;
+ vnode->flags = 1 << AFS_VNODE_UNSET;
vnode->cb_promised = false;
+ _leave(" = %p", &vnode->vfs_inode);
return &vnode->vfs_inode;
}
{
struct afs_vnode *vnode = AFS_FS_I(inode);
- _enter("{%lu}", inode->i_ino);
+ _enter("%p{%x:%u}", inode, vnode->fid.vid, vnode->fid.vnode);
_debug("DESTROY INODE %p", inode);
kmem_cache_free(afs_inode_cachep, vnode);
atomic_dec(&afs_count_active_inodes);
}
+
+/*
+ * return information about an AFS volume
+ */
+static int afs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct afs_volume_status vs;
+ struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
+ struct key *key;
+ int ret;
+
+ key = afs_request_key(vnode->volume->cell);
+ if (IS_ERR(key))
+ return PTR_ERR(key);
+
+ ret = afs_vnode_get_volume_status(vnode, key, &vs);
+ key_put(key);
+ if (ret < 0) {
+ _leave(" = %d", ret);
+ return ret;
+ }
+
+ buf->f_type = dentry->d_sb->s_magic;
+ buf->f_bsize = AFS_BLOCK_SIZE;
+ buf->f_namelen = AFSNAMEMAX - 1;
+
+ if (vs.max_quota == 0)
+ buf->f_blocks = vs.part_max_blocks;
+ else
+ buf->f_blocks = vs.max_quota;
+ buf->f_bavail = buf->f_bfree = buf->f_blocks - vs.blocks_in_use;
+ return 0;
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff