#include <linux/backing-dev.h>
#include <linux/uuid.h>
#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <net/sock.h>
#include <net/af_rxrpc.h>
#include "afs.h"
afs_voltype_t type; /* type of volume requested */
int volnamesz; /* size of volume name */
const char *volname; /* name of volume to mount */
- struct afs_net *net; /* Network namespace in effect */
+ struct net *net_ns; /* Network namespace in effect */
+ struct afs_net *net; /* the AFS net namespace stuff */
struct afs_cell *cell; /* cell in which to find volume */
struct afs_volume *volume; /* volume record */
struct key *key; /* key to use for secure mounting */
* - there's one superblock per volume
*/
struct afs_super_info {
- struct afs_net *net; /* Network namespace */
+ struct net *net_ns; /* Network namespace */
struct afs_cell *cell; /* The cell in which the volume resides */
struct afs_volume *volume; /* volume record */
bool dyn_root; /* True if dynamic root */
char *subs[AFS_NR_SYSNAME];
refcount_t usage;
unsigned short nr;
- short error;
char blank[1];
};
* AFS network namespace record.
*/
struct afs_net {
+ struct net *net; /* Backpointer to the owning net namespace */
struct afs_uuid uuid;
bool live; /* F if this namespace is being removed */
};
extern const char afs_init_sysname[];
-extern struct afs_net __afs_net;// Dummy AFS network namespace; TODO: replace with real netns
enum afs_cell_state {
AFS_CELL_UNSET,
* main.c
*/
extern struct workqueue_struct *afs_wq;
+extern int afs_net_id;
-static inline struct afs_net *afs_d2net(struct dentry *dentry)
+static inline struct afs_net *afs_net(struct net *net)
{
- return &__afs_net;
+ return net_generic(net, afs_net_id);
}
-static inline struct afs_net *afs_i2net(struct inode *inode)
+static inline struct afs_net *afs_sb2net(struct super_block *sb)
{
- return &__afs_net;
+ return afs_net(AFS_FS_S(sb)->net_ns);
}
-static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
+static inline struct afs_net *afs_d2net(struct dentry *dentry)
{
- return &__afs_net;
+ return afs_sb2net(dentry->d_sb);
}
-static inline struct afs_net *afs_sock2net(struct sock *sk)
+static inline struct afs_net *afs_i2net(struct inode *inode)
{
- return &__afs_net;
+ return afs_sb2net(inode->i_sb);
}
-static inline struct afs_net *afs_get_net(struct afs_net *net)
+static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
{
- return net;
+ return afs_i2net(&vnode->vfs_inode);
}
-static inline void afs_put_net(struct afs_net *net)
+static inline struct afs_net *afs_sock2net(struct sock *sk)
{
+ return net_generic(sock_net(sk), afs_net_id);
}
static inline void __afs_stat(atomic_t *s)
/*
* netdevices.c
*/
-extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool);
+extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *,
+ size_t, bool);
/*
* proc.c
*/
extern int __net_init afs_proc_init(struct afs_net *);
extern void __net_exit afs_proc_cleanup(struct afs_net *);
-extern int afs_proc_cell_setup(struct afs_net *, struct afs_cell *);
-extern void afs_proc_cell_remove(struct afs_net *, struct afs_cell *);
+extern int afs_proc_cell_setup(struct afs_cell *);
+extern void afs_proc_cell_remove(struct afs_cell *);
extern void afs_put_sysnames(struct afs_sysnames *);
/*
* super.c
*/
extern int __init afs_fs_init(void);
-extern void __exit afs_fs_exit(void);
+extern void afs_fs_exit(void);
/*
* vlclient.c
#include <linux/uaccess.h>
#include "internal.h"
-static inline struct afs_net *afs_proc2net(struct file *f)
+static inline struct afs_net *afs_seq2net(struct seq_file *m)
{
- return &__afs_net;
+ return afs_net(seq_file_net(m));
}
-static inline struct afs_net *afs_seq2net(struct seq_file *m)
+static inline struct afs_net *afs_seq2net_single(struct seq_file *m)
{
- return &__afs_net; // TODO: use seq_file_net(m)
+ return afs_net(seq_file_single_net(m));
}
/*
* handle writes to /proc/fs/afs/cells
* - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]"
*/
-static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
- size_t size, loff_t *_pos)
+static int afs_proc_cells_write(struct file *file, char *buf, size_t size)
{
- struct afs_net *net = afs_proc2net(file);
- char *kbuf, *name, *args;
+ struct seq_file *m = file->private_data;
+ struct afs_net *net = afs_seq2net(m);
+ char *name, *args;
int ret;
- /* start by dragging the command into memory */
- if (size <= 1 || size >= PAGE_SIZE)
- return -EINVAL;
-
- kbuf = memdup_user_nul(buf, size);
- if (IS_ERR(kbuf))
- return PTR_ERR(kbuf);
-
/* trim to first NL */
- name = memchr(kbuf, '\n', size);
+ name = memchr(buf, '\n', size);
if (name)
*name = 0;
/* split into command, name and argslist */
- name = strchr(kbuf, ' ');
+ name = strchr(buf, ' ');
if (!name)
goto inval;
do {
goto inval;
/* determine command to perform */
- _debug("cmd=%s name=%s args=%s", kbuf, name, args);
+ _debug("cmd=%s name=%s args=%s", buf, name, args);
- if (strcmp(kbuf, "add") == 0) {
+ if (strcmp(buf, "add") == 0) {
struct afs_cell *cell;
cell = afs_lookup_cell(net, name, strlen(name), args, true);
goto inval;
}
- ret = size;
+ ret = 0;
done:
- kfree(kbuf);
_leave(" = %d", ret);
return ret;
goto done;
}
-static int afs_proc_cells_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &afs_proc_cells_ops);
-}
-
-static const struct file_operations afs_proc_cells_fops = {
- .open = afs_proc_cells_open,
- .read = seq_read,
- .write = afs_proc_cells_write,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
/*
- * Read the name of the current workstation cell.
+ * Display the name of the current workstation cell.
*/
-static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf,
- size_t size, loff_t *_pos)
+static int afs_proc_rootcell_show(struct seq_file *m, void *v)
{
struct afs_cell *cell;
- struct afs_net *net = afs_proc2net(file);
- unsigned int seq = 0;
- char name[AFS_MAXCELLNAME + 1];
- int len;
-
- if (*_pos > 0)
- return 0;
- if (!rcu_access_pointer(net->ws_cell))
- return 0;
-
- rcu_read_lock();
- do {
- read_seqbegin_or_lock(&net->cells_lock, &seq);
- len = 0;
- cell = rcu_dereference_raw(net->ws_cell);
- if (cell) {
- len = cell->name_len;
- memcpy(name, cell->name, len);
- }
- } while (need_seqretry(&net->cells_lock, seq));
- done_seqretry(&net->cells_lock, seq);
- rcu_read_unlock();
-
- if (!len)
- return 0;
-
- name[len++] = '\n';
- if (len > size)
- len = size;
- if (copy_to_user(buf, name, len) != 0)
- return -EFAULT;
- *_pos = 1;
- return len;
+ struct afs_net *net;
+
+ net = afs_seq2net_single(m);
+ if (rcu_access_pointer(net->ws_cell)) {
+ rcu_read_lock();
+ cell = rcu_dereference(net->ws_cell);
+ if (cell)
+ seq_printf(m, "%s\n", cell->name);
+ rcu_read_unlock();
+ }
+ return 0;
}
/*
*
* echo "cell.name:192.168.231.14" >/proc/fs/afs/rootcell
*/
-static ssize_t afs_proc_rootcell_write(struct file *file,
- const char __user *buf,
- size_t size, loff_t *_pos)
+static int afs_proc_rootcell_write(struct file *file, char *buf, size_t size)
{
- struct afs_net *net = afs_proc2net(file);
- char *kbuf, *s;
+ struct seq_file *m = file->private_data;
+ struct afs_net *net = afs_seq2net_single(m);
+ char *s;
int ret;
- /* start by dragging the command into memory */
- if (size <= 1 || size >= PAGE_SIZE)
- return -EINVAL;
-
- kbuf = memdup_user_nul(buf, size);
- if (IS_ERR(kbuf))
- return PTR_ERR(kbuf);
-
ret = -EINVAL;
- if (kbuf[0] == '.')
+ if (buf[0] == '.')
goto out;
- if (memchr(kbuf, '/', size))
+ if (memchr(buf, '/', size))
goto out;
/* trim to first NL */
- s = memchr(kbuf, '\n', size);
+ s = memchr(buf, '\n', size);
if (s)
*s = 0;
/* determine command to perform */
- _debug("rootcell=%s", kbuf);
+ _debug("rootcell=%s", buf);
- ret = afs_cell_init(net, kbuf);
- if (ret >= 0)
- ret = size; /* consume everything, always */
+ ret = afs_cell_init(net, buf);
out:
- kfree(kbuf);
_leave(" = %d", ret);
return ret;
}
-static const struct file_operations afs_proc_rootcell_fops = {
- .read = afs_proc_rootcell_read,
- .write = afs_proc_rootcell_write,
- .llseek = no_llseek,
-};
-
static const char afs_vol_types[3][3] = {
[AFSVL_RWVOL] = "RW",
[AFSVL_ROVOL] = "RO",
return seq_list_start_head(&cell->proc_volumes, *_pos);
}
-static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
+static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v,
loff_t *_pos)
{
- struct afs_cell *cell = PDE_DATA(file_inode(p->file));
+ struct afs_cell *cell = PDE_DATA(file_inode(m->file));
return seq_list_next(v, &cell->proc_volumes, _pos);
}
-static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v)
+static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v)
__releases(cell->proc_lock)
{
- struct afs_cell *cell = PDE_DATA(file_inode(p->file));
+ struct afs_cell *cell = PDE_DATA(file_inode(m->file));
read_unlock(&cell->proc_lock);
}
return alist->addrs + pos;
}
-static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
+static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v,
loff_t *_pos)
{
struct afs_addr_list *alist;
- struct afs_cell *cell = PDE_DATA(file_inode(p->file));
+ struct afs_cell *cell = PDE_DATA(file_inode(m->file));
loff_t pos;
alist = rcu_dereference(cell->vl_addrs);
return alist->addrs + pos;
}
-static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v)
+static void afs_proc_cell_vlservers_stop(struct seq_file *m, void *v)
__releases(rcu)
{
rcu_read_unlock();
.show = afs_proc_cell_vlservers_show,
};
-static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file)
-{
- struct afs_cell *cell;
- struct seq_file *m;
- int ret;
-
- cell = PDE_DATA(inode);
- if (!cell)
- return -ENOENT;
-
- ret = seq_open(file, &afs_proc_cell_vlservers_ops);
- if (ret<0)
- return ret;
-
- m = file->private_data;
- m->private = cell;
-
- return 0;
-}
-
-static const struct file_operations afs_proc_cell_vlservers_fops = {
- .open = afs_proc_cell_vlservers_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
/*
* Display the list of fileservers we're using within a namespace.
*/
return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos);
}
-static void afs_proc_servers_stop(struct seq_file *p, void *v)
+static void afs_proc_servers_stop(struct seq_file *m, void *v)
__releases(rcu)
{
rcu_read_unlock();
.show = afs_proc_servers_show,
};
-static int afs_proc_servers_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &afs_proc_servers_ops);
-}
-
-static const struct file_operations afs_proc_servers_fops = {
- .open = afs_proc_servers_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
/*
* Display the list of strings that may be substituted for the @sys pathname
* macro.
__acquires(&net->sysnames_lock)
{
struct afs_net *net = afs_seq2net(m);
- struct afs_sysnames *names = net->sysnames;
+ struct afs_sysnames *names;
read_lock(&net->sysnames_lock);
+ names = net->sysnames;
if (*pos >= names->nr)
return NULL;
return (void *)(unsigned long)(*pos + 1);
/*
* Allow the @sys substitution to be configured.
*/
-static ssize_t afs_proc_sysname_write(struct file *file,
- const char __user *buf,
- size_t size, loff_t *_pos)
+static int afs_proc_sysname_write(struct file *file, char *buf, size_t size)
{
- struct afs_sysnames *sysnames;
+ struct afs_sysnames *sysnames, *kill;
struct seq_file *m = file->private_data;
- char *kbuf = NULL, *s, *p, *sub;
+ struct afs_net *net = afs_seq2net(m);
+ char *s, *p, *sub;
int ret, len;
- sysnames = m->private;
+ sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
if (!sysnames)
- return -EINVAL;
- if (sysnames->error)
- return sysnames->error;
+ return -ENOMEM;
+ refcount_set(&sysnames->usage, 1);
+ kill = sysnames;
- if (size >= PAGE_SIZE - 1) {
- sysnames->error = -EINVAL;
- return -EINVAL;
- }
- if (size == 0)
- return 0;
-
- kbuf = memdup_user_nul(buf, size);
- if (IS_ERR(kbuf))
- return PTR_ERR(kbuf);
-
- inode_lock(file_inode(file));
-
- p = kbuf;
+ p = buf;
while ((s = strsep(&p, " \t\n"))) {
len = strlen(s);
if (len == 0)
sysnames->nr++;
}
- ret = size; /* consume everything, always */
+ if (sysnames->nr == 0) {
+ sysnames->subs[0] = sysnames->blank;
+ sysnames->nr++;
+ }
+
+ write_lock(&net->sysnames_lock);
+ kill = net->sysnames;
+ net->sysnames = sysnames;
+ write_unlock(&net->sysnames_lock);
+ ret = 0;
out:
- inode_unlock(file_inode(file));
- kfree(kbuf);
+ afs_put_sysnames(kill);
return ret;
invalid:
ret = -EINVAL;
error:
- sysnames->error = ret;
goto out;
}
}
}
-static int afs_proc_sysname_release(struct inode *inode, struct file *file)
-{
- struct afs_sysnames *sysnames, *kill = NULL;
- struct seq_file *m = file->private_data;
- struct afs_net *net = afs_seq2net(m);
-
- sysnames = m->private;
- if (sysnames) {
- if (!sysnames->error) {
- kill = sysnames;
- if (sysnames->nr == 0) {
- sysnames->subs[0] = sysnames->blank;
- sysnames->nr++;
- }
- write_lock(&net->sysnames_lock);
- kill = net->sysnames;
- net->sysnames = sysnames;
- write_unlock(&net->sysnames_lock);
- }
- afs_put_sysnames(kill);
- }
-
- return seq_release(inode, file);
-}
-
-/*
- * Handle opening of /proc/fs/afs/sysname. If it is opened for writing, we
- * assume the caller wants to change the substitution list and we allocate a
- * buffer to hold the list.
- */
-static int afs_proc_sysname_open(struct inode *inode, struct file *file)
-{
- struct afs_sysnames *sysnames;
- struct seq_file *m;
- int ret;
-
- ret = seq_open(file, &afs_proc_sysname_ops);
- if (ret < 0)
- return ret;
-
- if (file->f_mode & FMODE_WRITE) {
- sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
- if (!sysnames) {
- seq_release(inode, file);
- return -ENOMEM;
- }
-
- refcount_set(&sysnames->usage, 1);
- m = file->private_data;
- m->private = sysnames;
- }
-
- return 0;
-}
-
-static const struct file_operations afs_proc_sysname_fops = {
- .open = afs_proc_sysname_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = afs_proc_sysname_release,
- .write = afs_proc_sysname_write,
-};
-
/*
* Display general per-net namespace statistics
*/
static int afs_proc_stats_show(struct seq_file *m, void *v)
{
- struct afs_net *net = afs_seq2net(m);
+ struct afs_net *net = afs_seq2net_single(m);
seq_puts(m, "kAFS statistics\n");
/*
* initialise /proc/fs/afs/<cell>/
*/
-int afs_proc_cell_setup(struct afs_net *net, struct afs_cell *cell)
+int afs_proc_cell_setup(struct afs_cell *cell)
{
struct proc_dir_entry *dir;
+ struct afs_net *net = cell->net;
_enter("%p{%s},%p", cell, cell->name, net->proc_afs);
- dir = proc_mkdir(cell->name, net->proc_afs);
+ dir = proc_net_mkdir(net->net, cell->name, net->proc_afs);
if (!dir)
goto error_dir;
- if (!proc_create_seq_data("vlservers", 0, dir,
- &afs_proc_cell_vlservers_ops, cell))
- goto error_tree;
- if (!proc_create_seq_data("volumes", 0, dir,
- &afs_proc_cell_volumes_ops, cell))
+ if (!proc_create_net_data("vlservers", 0444, dir,
+ &afs_proc_cell_vlservers_ops,
+ sizeof(struct seq_net_private),
+ cell) ||
+ !proc_create_net_data("volumes", 0444, dir,
+ &afs_proc_cell_volumes_ops,
+ sizeof(struct seq_net_private),
+ cell))
goto error_tree;
_leave(" = 0");
/*
* remove /proc/fs/afs/<cell>/
*/
-void afs_proc_cell_remove(struct afs_net *net, struct afs_cell *cell)
+void afs_proc_cell_remove(struct afs_cell *cell)
{
- _enter("");
+ struct afs_net *net = cell->net;
+ _enter("");
remove_proc_subtree(cell->name, net->proc_afs);
-
_leave("");
}
*/
int afs_proc_init(struct afs_net *net)
{
+ struct proc_dir_entry *p;
+
_enter("");
- net->proc_afs = proc_mkdir("fs/afs", NULL);
- if (!net->proc_afs)
+ p = proc_net_mkdir(net->net, "afs", net->net->proc_net);
+ if (!p)
goto error_dir;
- if (!proc_create("cells", 0644, net->proc_afs, &afs_proc_cells_fops) ||
- !proc_create("rootcell", 0644, net->proc_afs, &afs_proc_rootcell_fops) ||
- !proc_create_seq("servers", 0644, net->proc_afs, &afs_proc_servers_ops) ||
- !proc_create_single("stats", 0644, net->proc_afs, afs_proc_stats_show) ||
- !proc_create("sysname", 0644, net->proc_afs, &afs_proc_sysname_fops))
+ if (!proc_create_net_data_write("cells", 0644, p,
+ &afs_proc_cells_ops,
+ afs_proc_cells_write,
+ sizeof(struct seq_net_private),
+ NULL) ||
+ !proc_create_net_single_write("rootcell", 0644, p,
+ afs_proc_rootcell_show,
+ afs_proc_rootcell_write,
+ NULL) ||
+ !proc_create_net("servers", 0444, p, &afs_proc_servers_ops,
+ sizeof(struct seq_net_private)) ||
+ !proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) ||
+ !proc_create_net_data_write("sysname", 0644, p,
+ &afs_proc_sysname_ops,
+ afs_proc_sysname_write,
+ sizeof(struct seq_net_private),
+ NULL))
goto error_tree;
+ net->proc_afs = p;
_leave(" = 0");
return 0;
error_tree:
- proc_remove(net->proc_afs);
+ proc_remove(p);
error_dir:
_leave(" = -ENOMEM");
return -ENOMEM;
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