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Code Issues Releases Wiki Activity

Merge branch 'sunrpc_cache-for-2.6.32' into nfs-for-2.6.32

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This commit is contained in:
Trond Myklebust 2009-08-10 17:45:58 -04:00
commit f884dcaead
12 changed files with 957 additions and 503 deletions
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6
fs/nfs/idmap.c
View file

@ -101,7 +101,7 @@ static void idmap_pipe_destroy_msg(struct rpc_pipe_msg *);
static unsigned int fnvhash32(const void *, size_t);
static struct rpc_pipe_ops idmap_upcall_ops = {
static const struct rpc_pipe_ops idmap_upcall_ops = {
.upcall = idmap_pipe_upcall,
.downcall = idmap_pipe_downcall,
.destroy_msg = idmap_pipe_destroy_msg,
@ -119,8 +119,8 @@ nfs_idmap_new(struct nfs_client *clp)
if (idmap == NULL)
return -ENOMEM;
idmap->idmap_dentry = rpc_mkpipe(clp->cl_rpcclient->cl_dentry, "idmap",
idmap, &idmap_upcall_ops, 0);
idmap->idmap_dentry = rpc_mkpipe(clp->cl_rpcclient->cl_path.dentry,
"idmap", idmap, &idmap_upcall_ops, 0);
if (IS_ERR(idmap->idmap_dentry)) {
error = PTR_ERR(idmap->idmap_dentry);
kfree(idmap);

14
fs/nfsd/export.c
View file

@ -85,6 +85,11 @@ static void expkey_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall(cd, h, expkey_request);
}
static struct svc_expkey *svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old);
static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *);
static struct cache_detail svc_expkey_cache;
@ -259,7 +264,7 @@ static struct cache_detail svc_expkey_cache = {
.hash_table = expkey_table,
.name = "nfsd.fh",
.cache_put = expkey_put,
.cache_request = expkey_request,
.cache_upcall = expkey_upcall,
.cache_parse = expkey_parse,
.cache_show = expkey_show,
.match = expkey_match,
@ -355,6 +360,11 @@ static void svc_export_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall(cd, h, svc_export_request);
}
static struct svc_export *svc_export_update(struct svc_export *new,
struct svc_export *old);
static struct svc_export *svc_export_lookup(struct svc_export *);
@ -724,7 +734,7 @@ struct cache_detail svc_export_cache = {
.hash_table = export_table,
.name = "nfsd.export",
.cache_put = svc_export_put,
.cache_request = svc_export_request,
.cache_upcall = svc_export_upcall,
.cache_parse = svc_export_parse,
.cache_show = svc_export_show,
.match = svc_export_match,

20
fs/nfsd/nfs4idmap.c
View file

@ -145,6 +145,12 @@ idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
(*bpp)[-1] = '\n';
}
static int
idtoname_upcall(struct cache_detail *cd, struct cache_head *ch)
{
return sunrpc_cache_pipe_upcall(cd, ch, idtoname_request);
}
static int
idtoname_match(struct cache_head *ca, struct cache_head *cb)
{
@ -175,10 +181,10 @@ idtoname_show(struct seq_file *m, struct cache_detail *cd, struct cache_head *h)
}
static void
warn_no_idmapd(struct cache_detail *detail)
warn_no_idmapd(struct cache_detail *detail, int has_died)
{
printk("nfsd: nfsv4 idmapping failing: has idmapd %s?\n",
detail->last_close? "died" : "not been started");
has_died ? "died" : "not been started");
}
@ -192,7 +198,7 @@ static struct cache_detail idtoname_cache = {
.hash_table = idtoname_table,
.name = "nfs4.idtoname",
.cache_put = ent_put,
.cache_request = idtoname_request,
.cache_upcall = idtoname_upcall,
.cache_parse = idtoname_parse,
.cache_show = idtoname_show,
.warn_no_listener = warn_no_idmapd,
@ -324,6 +330,12 @@ nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
(*bpp)[-1] = '\n';
}
static int
nametoid_upcall(struct cache_detail *cd, struct cache_head *ch)
{
return sunrpc_cache_pipe_upcall(cd, ch, nametoid_request);
}
static int
nametoid_match(struct cache_head *ca, struct cache_head *cb)
{
@ -363,7 +375,7 @@ static struct cache_detail nametoid_cache = {
.hash_table = nametoid_table,
.name = "nfs4.nametoid",
.cache_put = ent_put,
.cache_request = nametoid_request,
.cache_upcall = nametoid_upcall,
.cache_parse = nametoid_parse,
.cache_show = nametoid_show,
.warn_no_listener = warn_no_idmapd,

40
include/linux/sunrpc/cache.h
View file

@ -59,6 +59,15 @@ struct cache_head {
#define CACHE_NEW_EXPIRY 120 /* keep new things pending confirmation for 120 seconds */
struct cache_detail_procfs {
struct proc_dir_entry *proc_ent;
struct proc_dir_entry *flush_ent, *channel_ent, *content_ent;
};
struct cache_detail_pipefs {
struct dentry *dir;
};
struct cache_detail {
struct module * owner;
int hash_size;
@ -70,15 +79,17 @@ struct cache_detail {
char *name;
void (*cache_put)(struct kref *);
void (*cache_request)(struct cache_detail *cd,
struct cache_head *h,
char **bpp, int *blen);
int (*cache_upcall)(struct cache_detail *,
struct cache_head *);
int (*cache_parse)(struct cache_detail *,
char *buf, int len);
int (*cache_show)(struct seq_file *m,
struct cache_detail *cd,
struct cache_head *h);
void (*warn_no_listener)(struct cache_detail *cd,
int has_died);
struct cache_head * (*alloc)(void);
int (*match)(struct cache_head *orig, struct cache_head *new);
@ -96,13 +107,15 @@ struct cache_detail {
/* fields for communication over channel */
struct list_head queue;
struct proc_dir_entry *proc_ent;
struct proc_dir_entry *flush_ent, *channel_ent, *content_ent;
atomic_t readers; /* how many time is /chennel open */
time_t last_close; /* if no readers, when did last close */
time_t last_warn; /* when we last warned about no readers */
void (*warn_no_listener)(struct cache_detail *cd);
union {
struct cache_detail_procfs procfs;
struct cache_detail_pipefs pipefs;
} u;
};
@ -127,6 +140,10 @@ struct cache_deferred_req {
};
extern const struct file_operations cache_file_operations_pipefs;
extern const struct file_operations content_file_operations_pipefs;
extern const struct file_operations cache_flush_operations_pipefs;
extern struct cache_head *
sunrpc_cache_lookup(struct cache_detail *detail,
struct cache_head *key, int hash);
@ -134,6 +151,13 @@ extern struct cache_head *
sunrpc_cache_update(struct cache_detail *detail,
struct cache_head *new, struct cache_head *old, int hash);
extern int
sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h,
void (*cache_request)(struct cache_detail *,
struct cache_head *,
char **,
int *));
extern void cache_clean_deferred(void *owner);
@ -171,6 +195,10 @@ extern void cache_purge(struct cache_detail *detail);
extern int cache_register(struct cache_detail *cd);
extern void cache_unregister(struct cache_detail *cd);
extern int sunrpc_cache_register_pipefs(struct dentry *parent, const char *,
mode_t, struct cache_detail *);
extern void sunrpc_cache_unregister_pipefs(struct cache_detail *);
extern void qword_add(char **bpp, int *lp, char *str);
extern void qword_addhex(char **bpp, int *lp, char *buf, int blen);
extern int qword_get(char **bpp, char *dest, int bufsize);

5
include/linux/sunrpc/clnt.h
View file

@ -21,6 +21,7 @@
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/timer.h>
#include <asm/signal.h>
#include <linux/path.h>
struct rpc_inode;
@ -54,9 +55,7 @@ struct rpc_clnt {
int cl_nodelen; /* nodename length */
char cl_nodename[UNX_MAXNODENAME];
char cl_pathname[30];/* Path in rpc_pipe_fs */
struct vfsmount * cl_vfsmnt;
struct dentry * cl_dentry; /* inode */
struct path cl_path;
struct rpc_clnt * cl_parent; /* Points to parent of clones */
struct rpc_rtt cl_rtt_default;
struct rpc_timeout cl_timeout_default;

18
include/linux/sunrpc/rpc_pipe_fs.h
View file

@ -32,8 +32,8 @@ struct rpc_inode {
wait_queue_head_t waitq;
#define RPC_PIPE_WAIT_FOR_OPEN 1
int flags;
struct rpc_pipe_ops *ops;
struct delayed_work queue_timeout;
const struct rpc_pipe_ops *ops;
};
static inline struct rpc_inode *
@ -44,9 +44,19 @@ RPC_I(struct inode *inode)
extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *);
extern struct dentry *rpc_mkdir(char *, struct rpc_clnt *);
extern int rpc_rmdir(struct dentry *);
extern struct dentry *rpc_mkpipe(struct dentry *, const char *, void *, struct rpc_pipe_ops *, int flags);
struct rpc_clnt;
extern struct dentry *rpc_create_client_dir(struct dentry *, struct qstr *, struct rpc_clnt *);
extern int rpc_remove_client_dir(struct dentry *);
struct cache_detail;
extern struct dentry *rpc_create_cache_dir(struct dentry *,
struct qstr *,
mode_t umode,
struct cache_detail *);
extern void rpc_remove_cache_dir(struct dentry *);
extern struct dentry *rpc_mkpipe(struct dentry *, const char *, void *,
const struct rpc_pipe_ops *, int flags);
extern int rpc_unlink(struct dentry *);
extern struct vfsmount *rpc_get_mount(void);
extern void rpc_put_mount(void);

12
net/sunrpc/auth_gss/auth_gss.c
View file

@ -89,8 +89,8 @@ static struct rpc_wait_queue pipe_version_rpc_waitqueue;
static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue);
static void gss_free_ctx(struct gss_cl_ctx *);
static struct rpc_pipe_ops gss_upcall_ops_v0;
static struct rpc_pipe_ops gss_upcall_ops_v1;
static const struct rpc_pipe_ops gss_upcall_ops_v0;
static const struct rpc_pipe_ops gss_upcall_ops_v1;
static inline struct gss_cl_ctx *
gss_get_ctx(struct gss_cl_ctx *ctx)
@ -777,7 +777,7 @@ gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
* that we supported only the old pipe. So we instead create
* the new pipe first.
*/
gss_auth->dentry[1] = rpc_mkpipe(clnt->cl_dentry,
gss_auth->dentry[1] = rpc_mkpipe(clnt->cl_path.dentry,
"gssd",
clnt, &gss_upcall_ops_v1,
RPC_PIPE_WAIT_FOR_OPEN);
@ -786,7 +786,7 @@ gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
goto err_put_mech;
}
gss_auth->dentry[0] = rpc_mkpipe(clnt->cl_dentry,
gss_auth->dentry[0] = rpc_mkpipe(clnt->cl_path.dentry,
gss_auth->mech->gm_name,
clnt, &gss_upcall_ops_v0,
RPC_PIPE_WAIT_FOR_OPEN);
@ -1507,7 +1507,7 @@ static const struct rpc_credops gss_nullops = {
.crunwrap_resp = gss_unwrap_resp,
};
static struct rpc_pipe_ops gss_upcall_ops_v0 = {
static const struct rpc_pipe_ops gss_upcall_ops_v0 = {
.upcall = gss_pipe_upcall,
.downcall = gss_pipe_downcall,
.destroy_msg = gss_pipe_destroy_msg,
@ -1515,7 +1515,7 @@ static struct rpc_pipe_ops gss_upcall_ops_v0 = {
.release_pipe = gss_pipe_release,
};
static struct rpc_pipe_ops gss_upcall_ops_v1 = {
static const struct rpc_pipe_ops gss_upcall_ops_v1 = {
.upcall = gss_pipe_upcall,
.downcall = gss_pipe_downcall,
.destroy_msg = gss_pipe_destroy_msg,

7
net/sunrpc/auth_gss/svcauth_gss.c
View file

@ -181,6 +181,11 @@ static void rsi_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
}
static int rsi_parse(struct cache_detail *cd,
char *mesg, int mlen)
@ -270,7 +275,7 @@ static struct cache_detail rsi_cache = {
.hash_table = rsi_table,
.name = "auth.rpcsec.init",
.cache_put = rsi_put,
.cache_request = rsi_request,
.cache_upcall = rsi_upcall,
.cache_parse = rsi_parse,
.match = rsi_match,
.init = rsi_init,

556
net/sunrpc/cache.c
View file

@ -27,10 +27,12 @@
#include <linux/net.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
#include <linux/pagemap.h>
#include <asm/ioctls.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/cache.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
#define RPCDBG_FACILITY RPCDBG_CACHE
@ -175,7 +177,13 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail,
}
EXPORT_SYMBOL_GPL(sunrpc_cache_update);
static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h);
static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
{
if (!cd->cache_upcall)
return -EINVAL;
return cd->cache_upcall(cd, h);
}
/*
* This is the generic cache management routine for all
* the authentication caches.
@ -284,76 +292,11 @@ static DEFINE_SPINLOCK(cache_list_lock);
static struct cache_detail *current_detail;
static int current_index;
static const struct file_operations cache_file_operations;
static const struct file_operations content_file_operations;
static const struct file_operations cache_flush_operations;
static void do_cache_clean(struct work_struct *work);
static DECLARE_DELAYED_WORK(cache_cleaner, do_cache_clean);
static void remove_cache_proc_entries(struct cache_detail *cd)
static void sunrpc_init_cache_detail(struct cache_detail *cd)
{
if (cd->proc_ent == NULL)
return;
if (cd->flush_ent)
remove_proc_entry("flush", cd->proc_ent);
if (cd->channel_ent)
remove_proc_entry("channel", cd->proc_ent);
if (cd->content_ent)
remove_proc_entry("content", cd->proc_ent);
cd->proc_ent = NULL;
remove_proc_entry(cd->name, proc_net_rpc);
}
#ifdef CONFIG_PROC_FS
static int create_cache_proc_entries(struct cache_detail *cd)
{
struct proc_dir_entry *p;
cd->proc_ent = proc_mkdir(cd->name, proc_net_rpc);
if (cd->proc_ent == NULL)
goto out_nomem;
cd->channel_ent = cd->content_ent = NULL;
p = proc_create_data("flush", S_IFREG|S_IRUSR|S_IWUSR,
cd->proc_ent, &cache_flush_operations, cd);
cd->flush_ent = p;
if (p == NULL)
goto out_nomem;
if (cd->cache_request || cd->cache_parse) {
p = proc_create_data("channel", S_IFREG|S_IRUSR|S_IWUSR,
cd->proc_ent, &cache_file_operations, cd);
cd->channel_ent = p;
if (p == NULL)
goto out_nomem;
}
if (cd->cache_show) {
p = proc_create_data("content", S_IFREG|S_IRUSR|S_IWUSR,
cd->proc_ent, &content_file_operations, cd);
cd->content_ent = p;
if (p == NULL)
goto out_nomem;
}
return 0;
out_nomem:
remove_cache_proc_entries(cd);
return -ENOMEM;
}
#else /* CONFIG_PROC_FS */
static int create_cache_proc_entries(struct cache_detail *cd)
{
return 0;
}
#endif
int cache_register(struct cache_detail *cd)
{
int ret;
ret = create_cache_proc_entries(cd);
if (ret)
return ret;
rwlock_init(&cd->hash_lock);
INIT_LIST_HEAD(&cd->queue);
spin_lock(&cache_list_lock);
@ -367,11 +310,9 @@ int cache_register(struct cache_detail *cd)
/* start the cleaning process */
schedule_delayed_work(&cache_cleaner, 0);
return 0;
}
EXPORT_SYMBOL_GPL(cache_register);
void cache_unregister(struct cache_detail *cd)
static void sunrpc_destroy_cache_detail(struct cache_detail *cd)
{
cache_purge(cd);
spin_lock(&cache_list_lock);
@ -386,7 +327,6 @@ void cache_unregister(struct cache_detail *cd)
list_del_init(&cd->others);
write_unlock(&cd->hash_lock);
spin_unlock(&cache_list_lock);
remove_cache_proc_entries(cd);
if (list_empty(&cache_list)) {
/* module must be being unloaded so its safe to kill the worker */
cancel_delayed_work_sync(&cache_cleaner);
@ -395,7 +335,6 @@ void cache_unregister(struct cache_detail *cd)
out:
printk(KERN_ERR "nfsd: failed to unregister %s cache\n", cd->name);
}
EXPORT_SYMBOL_GPL(cache_unregister);
/* clean cache tries to find something to clean
* and cleans it.
@ -687,18 +626,18 @@ struct cache_reader {
int offset; /* if non-0, we have a refcnt on next request */
};
static ssize_t
cache_read(struct file *filp, char __user *buf, size_t count, loff_t *ppos)
static ssize_t cache_read(struct file *filp, char __user *buf, size_t count,
loff_t *ppos, struct cache_detail *cd)
{
struct cache_reader *rp = filp->private_data;
struct cache_request *rq;
struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
struct inode *inode = filp->f_path.dentry->d_inode;
int err;
if (count == 0)
return 0;
mutex_lock(&queue_io_mutex); /* protect against multiple concurrent
mutex_lock(&inode->i_mutex); /* protect against multiple concurrent
* readers on this file */
again:
spin_lock(&queue_lock);
@ -711,7 +650,7 @@ cache_read(struct file *filp, char __user *buf, size_t count, loff_t *ppos)
}
if (rp->q.list.next == &cd->queue) {
spin_unlock(&queue_lock);
mutex_unlock(&queue_io_mutex);
mutex_unlock(&inode->i_mutex);
BUG_ON(rp->offset);
return 0;
}
@ -758,49 +697,90 @@ cache_read(struct file *filp, char __user *buf, size_t count, loff_t *ppos)
}
if (err == -EAGAIN)
goto again;
mutex_unlock(&queue_io_mutex);
mutex_unlock(&inode->i_mutex);
return err ? err : count;
}
static char write_buf[8192]; /* protected by queue_io_mutex */
static ssize_t
cache_write(struct file *filp, const char __user *buf, size_t count,
loff_t *ppos)
static ssize_t cache_do_downcall(char *kaddr, const char __user *buf,
size_t count, struct cache_detail *cd)
{
int err;
struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
ssize_t ret;
if (count == 0)
return 0;
if (count >= sizeof(write_buf))
return -EINVAL;
mutex_lock(&queue_io_mutex);
if (copy_from_user(write_buf, buf, count)) {
mutex_unlock(&queue_io_mutex);
if (copy_from_user(kaddr, buf, count))
return -EFAULT;
}
write_buf[count] = '\0';
if (cd->cache_parse)
err = cd->cache_parse(cd, write_buf, count);
else
err = -EINVAL;
kaddr[count] = '\0';
ret = cd->cache_parse(cd, kaddr, count);
if (!ret)
ret = count;
return ret;
}
static ssize_t cache_slow_downcall(const char __user *buf,
size_t count, struct cache_detail *cd)
{
static char write_buf[8192]; /* protected by queue_io_mutex */
ssize_t ret = -EINVAL;
if (count >= sizeof(write_buf))
goto out;
mutex_lock(&queue_io_mutex);
ret = cache_do_downcall(write_buf, buf, count, cd);
mutex_unlock(&queue_io_mutex);
return err ? err : count;
out:
return ret;
}
static ssize_t cache_downcall(struct address_space *mapping,
const char __user *buf,
size_t count, struct cache_detail *cd)
{
struct page *page;
char *kaddr;
ssize_t ret = -ENOMEM;
if (count >= PAGE_CACHE_SIZE)
goto out_slow;
page = find_or_create_page(mapping, 0, GFP_KERNEL);
if (!page)
goto out_slow;
kaddr = kmap(page);
ret = cache_do_downcall(kaddr, buf, count, cd);
kunmap(page);
unlock_page(page);
page_cache_release(page);
return ret;
out_slow:
return cache_slow_downcall(buf, count, cd);
}
static ssize_t cache_write(struct file *filp, const char __user *buf,
size_t count, loff_t *ppos,
struct cache_detail *cd)
{
struct address_space *mapping = filp->f_mapping;
struct inode *inode = filp->f_path.dentry->d_inode;
ssize_t ret = -EINVAL;
if (!cd->cache_parse)
goto out;
mutex_lock(&inode->i_mutex);
ret = cache_downcall(mapping, buf, count, cd);
mutex_unlock(&inode->i_mutex);
out:
return ret;
}
static DECLARE_WAIT_QUEUE_HEAD(queue_wait);
static unsigned int
cache_poll(struct file *filp, poll_table *wait)
static unsigned int cache_poll(struct file *filp, poll_table *wait,
struct cache_detail *cd)
{
unsigned int mask;
struct cache_reader *rp = filp->private_data;
struct cache_queue *cq;
struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
poll_wait(filp, &queue_wait, wait);
@ -822,14 +802,13 @@ cache_poll(struct file *filp, poll_table *wait)
return mask;
}
static int
cache_ioctl(struct inode *ino, struct file *filp,
unsigned int cmd, unsigned long arg)
static int cache_ioctl(struct inode *ino, struct file *filp,
unsigned int cmd, unsigned long arg,
struct cache_detail *cd)
{
int len = 0;
struct cache_reader *rp = filp->private_data;
struct cache_queue *cq;
struct cache_detail *cd = PDE(ino)->data;
if (cmd != FIONREAD || !rp)
return -EINVAL;
@ -852,15 +831,13 @@ cache_ioctl(struct inode *ino, struct file *filp,
return put_user(len, (int __user *)arg);
}
static int
cache_open(struct inode *inode, struct file *filp)
static int cache_open(struct inode *inode, struct file *filp,
struct cache_detail *cd)
{
struct cache_reader *rp = NULL;
nonseekable_open(inode, filp);
if (filp->f_mode & FMODE_READ) {
struct cache_detail *cd = PDE(inode)->data;
rp = kmalloc(sizeof(*rp), GFP_KERNEL);
if (!rp)
return -ENOMEM;
@ -875,11 +852,10 @@ cache_open(struct inode *inode, struct file *filp)
return 0;
}
static int
cache_release(struct inode *inode, struct file *filp)
static int cache_release(struct inode *inode, struct file *filp,
struct cache_detail *cd)
{
struct cache_reader *rp = filp->private_data;
struct cache_detail *cd = PDE(inode)->data;
if (rp) {
spin_lock(&queue_lock);
@ -908,18 +884,6 @@ cache_release(struct inode *inode, struct file *filp)
static const struct file_operations cache_file_operations = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = cache_read,
.write = cache_write,
.poll = cache_poll,
.ioctl = cache_ioctl, /* for FIONREAD */
.open = cache_open,
.release = cache_release,
};
static void queue_loose(struct cache_detail *detail, struct cache_head *ch)
{
struct cache_queue *cq;
@ -1020,15 +984,21 @@ static void warn_no_listener(struct cache_detail *detail)
if (detail->last_warn != detail->last_close) {
detail->last_warn = detail->last_close;
if (detail->warn_no_listener)
detail->warn_no_listener(detail);
detail->warn_no_listener(detail, detail->last_close != 0);
}
}
/*
* register an upcall request to user-space.
* register an upcall request to user-space and queue it up for read() by the
* upcall daemon.
*
* Each request is at most one page long.
*/
static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h)
int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h,
void (*cache_request)(struct cache_detail *,
struct cache_head *,
char **,
int *))
{
char *buf;
@ -1036,9 +1006,6 @@ static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h)
char *bp;
int len;
if (detail->cache_request == NULL)
return -EINVAL;
if (atomic_read(&detail->readers) == 0 &&
detail->last_close < get_seconds() - 30) {
warn_no_listener(detail);
@ -1057,7 +1024,7 @@ static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h)
bp = buf; len = PAGE_SIZE;
detail->cache_request(detail, h, &bp, &len);
cache_request(detail, h, &bp, &len);
if (len < 0) {
kfree(buf);
@ -1075,6 +1042,7 @@ static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h)
wake_up(&queue_wait);
return 0;
}
EXPORT_SYMBOL_GPL(sunrpc_cache_pipe_upcall);
/*
* parse a message from user-space and pass it
@ -1242,10 +1210,10 @@ static const struct seq_operations cache_content_op = {
.show = c_show,
};
static int content_open(struct inode *inode, struct file *file)
static int content_open(struct inode *inode, struct file *file,
struct cache_detail *cd)
{
struct handle *han;
struct cache_detail *cd = PDE(inode)->data;
han = __seq_open_private(file, &cache_content_op, sizeof(*han));
if (han == NULL)
@ -1255,17 +1223,10 @@ static int content_open(struct inode *inode, struct file *file)
return 0;
}
static const struct file_operations content_file_operations = {
.open = content_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
};
static ssize_t read_flush(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
size_t count, loff_t *ppos,
struct cache_detail *cd)
{
struct cache_detail *cd = PDE(file->f_path.dentry->d_inode)->data;
char tbuf[20];
unsigned long p = *ppos;
size_t len;
@ -1283,10 +1244,10 @@ static ssize_t read_flush(struct file *file, char __user *buf,
return len;
}
static ssize_t write_flush(struct file * file, const char __user * buf,
size_t count, loff_t *ppos)
static ssize_t write_flush(struct file *file, const char __user *buf,
size_t count, loff_t *ppos,
struct cache_detail *cd)
{
struct cache_detail *cd = PDE(file->f_path.dentry->d_inode)->data;
char tbuf[20];
char *ep;
long flushtime;
@ -1307,8 +1268,299 @@ static ssize_t write_flush(struct file * file, const char __user * buf,
return count;
}
static const struct file_operations cache_flush_operations = {
.open = nonseekable_open,
.read = read_flush,
.write = write_flush,
static ssize_t cache_read_procfs(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
return cache_read(filp, buf, count, ppos, cd);
}
static ssize_t cache_write_procfs(struct file *filp, const char __user *buf,
size_t count, loff_t *ppos)
{
struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
return cache_write(filp, buf, count, ppos, cd);
}
static unsigned int cache_poll_procfs(struct file *filp, poll_table *wait)
{
struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
return cache_poll(filp, wait, cd);
}
static int cache_ioctl_procfs(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct cache_detail *cd = PDE(inode)->data;
return cache_ioctl(inode, filp, cmd, arg, cd);
}
static int cache_open_procfs(struct inode *inode, struct file *filp)
{
struct cache_detail *cd = PDE(inode)->data;
return cache_open(inode, filp, cd);
}
static int cache_release_procfs(struct inode *inode, struct file *filp)
{
struct cache_detail *cd = PDE(inode)->data;
return cache_release(inode, filp, cd);
}
static const struct file_operations cache_file_operations_procfs = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = cache_read_procfs,
.write = cache_write_procfs,
.poll = cache_poll_procfs,
.ioctl = cache_ioctl_procfs, /* for FIONREAD */
.open = cache_open_procfs,
.release = cache_release_procfs,
};
static int content_open_procfs(struct inode *inode, struct file *filp)
{
struct cache_detail *cd = PDE(inode)->data;
return content_open(inode, filp, cd);
}
static const struct file_operations content_file_operations_procfs = {
.open = content_open_procfs,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
};
static ssize_t read_flush_procfs(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
return read_flush(filp, buf, count, ppos, cd);
}
static ssize_t write_flush_procfs(struct file *filp,
const char __user *buf,
size_t count, loff_t *ppos)
{
struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
return write_flush(filp, buf, count, ppos, cd);
}
static const struct file_operations cache_flush_operations_procfs = {
.open = nonseekable_open,
.read = read_flush_procfs,
.write = write_flush_procfs,
};
static void remove_cache_proc_entries(struct cache_detail *cd)
{
if (cd->u.procfs.proc_ent == NULL)
return;
if (cd->u.procfs.flush_ent)
remove_proc_entry("flush", cd->u.procfs.proc_ent);
if (cd->u.procfs.channel_ent)
remove_proc_entry("channel", cd->u.procfs.proc_ent);
if (cd->u.procfs.content_ent)
remove_proc_entry("content", cd->u.procfs.proc_ent);
cd->u.procfs.proc_ent = NULL;
remove_proc_entry(cd->name, proc_net_rpc);
}
#ifdef CONFIG_PROC_FS
static int create_cache_proc_entries(struct cache_detail *cd)
{
struct proc_dir_entry *p;
cd->u.procfs.proc_ent = proc_mkdir(cd->name, proc_net_rpc);
if (cd->u.procfs.proc_ent == NULL)
goto out_nomem;
cd->u.procfs.channel_ent = NULL;
cd->u.procfs.content_ent = NULL;
p = proc_create_data("flush", S_IFREG|S_IRUSR|S_IWUSR,
cd->u.procfs.proc_ent,
&cache_flush_operations_procfs, cd);
cd->u.procfs.flush_ent = p;
if (p == NULL)
goto out_nomem;
if (cd->cache_upcall || cd->cache_parse) {
p = proc_create_data("channel", S_IFREG|S_IRUSR|S_IWUSR,
cd->u.procfs.proc_ent,
&cache_file_operations_procfs, cd);
cd->u.procfs.channel_ent = p;
if (p == NULL)
goto out_nomem;
}
if (cd->cache_show) {
p = proc_create_data("content", S_IFREG|S_IRUSR|S_IWUSR,
cd->u.procfs.proc_ent,
&content_file_operations_procfs, cd);
cd->u.procfs.content_ent = p;
if (p == NULL)
goto out_nomem;
}
return 0;
out_nomem:
remove_cache_proc_entries(cd);
return -ENOMEM;
}
#else /* CONFIG_PROC_FS */
static int create_cache_proc_entries(struct cache_detail *cd)
{
return 0;
}
#endif
int cache_register(struct cache_detail *cd)
{
int ret;
sunrpc_init_cache_detail(cd);
ret = create_cache_proc_entries(cd);
if (ret)
sunrpc_destroy_cache_detail(cd);
return ret;
}
EXPORT_SYMBOL_GPL(cache_register);
void cache_unregister(struct cache_detail *cd)
{
remove_cache_proc_entries(cd);
sunrpc_destroy_cache_detail(cd);
}
EXPORT_SYMBOL_GPL(cache_unregister);
static ssize_t cache_read_pipefs(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
return cache_read(filp, buf, count, ppos, cd);
}
static ssize_t cache_write_pipefs(struct file *filp, const char __user *buf,
size_t count, loff_t *ppos)
{
struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
return cache_write(filp, buf, count, ppos, cd);
}
static unsigned int cache_poll_pipefs(struct file *filp, poll_table *wait)
{
struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
return cache_poll(filp, wait, cd);
}
static int cache_ioctl_pipefs(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct cache_detail *cd = RPC_I(inode)->private;
return cache_ioctl(inode, filp, cmd, arg, cd);
}
static int cache_open_pipefs(struct inode *inode, struct file *filp)
{
struct cache_detail *cd = RPC_I(inode)->private;
return cache_open(inode, filp, cd);
}
static int cache_release_pipefs(struct inode *inode, struct file *filp)
{
struct cache_detail *cd = RPC_I(inode)->private;
return cache_release(inode, filp, cd);
}
const struct file_operations cache_file_operations_pipefs = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = cache_read_pipefs,
.write = cache_write_pipefs,
.poll = cache_poll_pipefs,
.ioctl = cache_ioctl_pipefs, /* for FIONREAD */
.open = cache_open_pipefs,
.release = cache_release_pipefs,
};
static int content_open_pipefs(struct inode *inode, struct file *filp)
{
struct cache_detail *cd = RPC_I(inode)->private;
return content_open(inode, filp, cd);
}
const struct file_operations content_file_operations_pipefs = {
.open = content_open_pipefs,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
};
static ssize_t read_flush_pipefs(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
return read_flush(filp, buf, count, ppos, cd);
}
static ssize_t write_flush_pipefs(struct file *filp,
const char __user *buf,
size_t count, loff_t *ppos)
{
struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
return write_flush(filp, buf, count, ppos, cd);
}
const struct file_operations cache_flush_operations_pipefs = {
.open = nonseekable_open,
.read = read_flush_pipefs,
.write = write_flush_pipefs,
};
int sunrpc_cache_register_pipefs(struct dentry *parent,
const char *name, mode_t umode,
struct cache_detail *cd)
{
struct qstr q;
struct dentry *dir;
int ret = 0;
sunrpc_init_cache_detail(cd);
q.name = name;
q.len = strlen(name);
q.hash = full_name_hash(q.name, q.len);
dir = rpc_create_cache_dir(parent, &q, umode, cd);
if (!IS_ERR(dir))
cd->u.pipefs.dir = dir;
else {
sunrpc_destroy_cache_detail(cd);
ret = PTR_ERR(dir);
}
return ret;
}
EXPORT_SYMBOL_GPL(sunrpc_cache_register_pipefs);
void sunrpc_cache_unregister_pipefs(struct cache_detail *cd)
{
rpc_remove_cache_dir(cd->u.pipefs.dir);
cd->u.pipefs.dir = NULL;
sunrpc_destroy_cache_detail(cd);
}
EXPORT_SYMBOL_GPL(sunrpc_cache_unregister_pipefs);

60
net/sunrpc/clnt.c
View file

@ -27,6 +27,8 @@
#include <linux/types.h>
#include <linux/kallsyms.h>
#include <linux/mm.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/slab.h>
#include <linux/utsname.h>
#include <linux/workqueue.h>
@ -97,33 +99,49 @@ static int
rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
{
static uint32_t clntid;
struct nameidata nd;
struct path path;
char name[15];
struct qstr q = {
.name = name,
};
int error;
clnt->cl_vfsmnt = ERR_PTR(-ENOENT);
clnt->cl_dentry = ERR_PTR(-ENOENT);
clnt->cl_path.mnt = ERR_PTR(-ENOENT);
clnt->cl_path.dentry = ERR_PTR(-ENOENT);
if (dir_name == NULL)
return 0;
clnt->cl_vfsmnt = rpc_get_mount();
if (IS_ERR(clnt->cl_vfsmnt))
return PTR_ERR(clnt->cl_vfsmnt);
path.mnt = rpc_get_mount();
if (IS_ERR(path.mnt))
return PTR_ERR(path.mnt);
error = vfs_path_lookup(path.mnt->mnt_root, path.mnt, dir_name, 0, &nd);
if (error)
goto err;
for (;;) {
snprintf(clnt->cl_pathname, sizeof(clnt->cl_pathname),
"%s/clnt%x", dir_name,
(unsigned int)clntid++);
clnt->cl_pathname[sizeof(clnt->cl_pathname) - 1] = '\0';
clnt->cl_dentry = rpc_mkdir(clnt->cl_pathname, clnt);
if (!IS_ERR(clnt->cl_dentry))
return 0;
error = PTR_ERR(clnt->cl_dentry);
q.len = snprintf(name, sizeof(name), "clnt%x", (unsigned int)clntid++);
name[sizeof(name) - 1] = '\0';
q.hash = full_name_hash(q.name, q.len);
path.dentry = rpc_create_client_dir(nd.path.dentry, &q, clnt);
if (!IS_ERR(path.dentry))
break;
error = PTR_ERR(path.dentry);
if (error != -EEXIST) {
printk(KERN_INFO "RPC: Couldn't create pipefs entry %s, error %d\n",
clnt->cl_pathname, error);
rpc_put_mount();
return error;
printk(KERN_INFO "RPC: Couldn't create pipefs entry"
" %s/%s, error %d\n",
dir_name, name, error);
goto err_path_put;
}
}
path_put(&nd.path);
clnt->cl_path = path;
return 0;
err_path_put:
path_put(&nd.path);
err:
rpc_put_mount();
return error;
}
static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, struct rpc_xprt *xprt)
@ -231,8 +249,8 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, stru
return clnt;
out_no_auth:
if (!IS_ERR(clnt->cl_dentry)) {
rpc_rmdir(clnt->cl_dentry);
if (!IS_ERR(clnt->cl_path.dentry)) {
rpc_remove_client_dir(clnt->cl_path.dentry);
rpc_put_mount();
}
out_no_path:
@ -423,8 +441,8 @@ rpc_free_client(struct kref *kref)
dprintk("RPC: destroying %s client for %s\n",
clnt->cl_protname, clnt->cl_server);
if (!IS_ERR(clnt->cl_dentry)) {
rpc_rmdir(clnt->cl_dentry);
if (!IS_ERR(clnt->cl_path.dentry)) {
rpc_remove_client_dir(clnt->cl_path.dentry);
rpc_put_mount();
}
if (clnt->cl_parent != clnt) {

708
net/sunrpc/rpc_pipe.c
View file

@ -26,6 +26,7 @@
#include <linux/sunrpc/clnt.h>
#include <linux/workqueue.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/sunrpc/cache.h>
static struct vfsmount *rpc_mount __read_mostly;
static int rpc_mount_count;
@ -125,7 +126,7 @@ static void
rpc_close_pipes(struct inode *inode)
{
struct rpc_inode *rpci = RPC_I(inode);
struct rpc_pipe_ops *ops;
const struct rpc_pipe_ops *ops;
int need_release;
mutex_lock(&inode->i_mutex);
@ -397,67 +398,13 @@ static const struct file_operations rpc_info_operations = {
};
/*
* We have a single directory with 1 node in it.
*/
enum {
RPCAUTH_Root = 1,
RPCAUTH_lockd,
RPCAUTH_mount,
RPCAUTH_nfs,
RPCAUTH_portmap,
RPCAUTH_statd,
RPCAUTH_nfsd4_cb,
RPCAUTH_RootEOF
};
/*
* Description of fs contents.
*/
struct rpc_filelist {
char *name;
const char *name;
const struct file_operations *i_fop;
int mode;
};
static struct rpc_filelist files[] = {
[RPCAUTH_lockd] = {
.name = "lockd",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
[RPCAUTH_mount] = {
.name = "mount",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
[RPCAUTH_nfs] = {
.name = "nfs",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
[RPCAUTH_portmap] = {
.name = "portmap",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
[RPCAUTH_statd] = {
.name = "statd",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
[RPCAUTH_nfsd4_cb] = {
.name = "nfsd4_cb",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
};
enum {
RPCAUTH_info = 2,
RPCAUTH_EOF
};
static struct rpc_filelist authfiles[] = {
[RPCAUTH_info] = {
.name = "info",
.i_fop = &rpc_info_operations,
.mode = S_IFREG | S_IRUSR,
},
umode_t mode;
};
struct vfsmount *rpc_get_mount(void)
@ -484,39 +431,8 @@ static const struct dentry_operations rpc_dentry_operations = {
.d_delete = rpc_delete_dentry,
};
static int
rpc_lookup_parent(char *path, struct nameidata *nd)
{
struct vfsmount *mnt;
if (path[0] == '\0')
return -ENOENT;
mnt = rpc_get_mount();
if (IS_ERR(mnt)) {
printk(KERN_WARNING "%s: %s failed to mount "
"pseudofilesystem \n", __FILE__, __func__);
return PTR_ERR(mnt);
}
if (vfs_path_lookup(mnt->mnt_root, mnt, path, LOOKUP_PARENT, nd)) {
printk(KERN_WARNING "%s: %s failed to find path %s\n",
__FILE__, __func__, path);
rpc_put_mount();
return -ENOENT;
}
return 0;
}
static void
rpc_release_path(struct nameidata *nd)
{
path_put(&nd->path);
rpc_put_mount();
}
static struct inode *
rpc_get_inode(struct super_block *sb, int mode)
rpc_get_inode(struct super_block *sb, umode_t mode)
{
struct inode *inode = new_inode(sb);
if (!inode)
@ -534,212 +450,274 @@ rpc_get_inode(struct super_block *sb, int mode)
return inode;
}
/*
* FIXME: This probably has races.
*/
static void rpc_depopulate(struct dentry *parent,
unsigned long start, unsigned long eof)
{
struct inode *dir = parent->d_inode;
struct list_head *pos, *next;
struct dentry *dentry, *dvec[10];
int n = 0;
mutex_lock_nested(&dir->i_mutex, I_MUTEX_CHILD);
repeat:
spin_lock(&dcache_lock);
list_for_each_safe(pos, next, &parent->d_subdirs) {
dentry = list_entry(pos, struct dentry, d_u.d_child);
if (!dentry->d_inode ||
dentry->d_inode->i_ino < start ||
dentry->d_inode->i_ino >= eof)
continue;
spin_lock(&dentry->d_lock);
if (!d_unhashed(dentry)) {
dget_locked(dentry);
__d_drop(dentry);
spin_unlock(&dentry->d_lock);
dvec[n++] = dentry;
if (n == ARRAY_SIZE(dvec))
break;
} else
spin_unlock(&dentry->d_lock);
}
spin_unlock(&dcache_lock);
if (n) {
do {
dentry = dvec[--n];
if (S_ISREG(dentry->d_inode->i_mode))
simple_unlink(dir, dentry);
else if (S_ISDIR(dentry->d_inode->i_mode))
simple_rmdir(dir, dentry);
d_delete(dentry);
dput(dentry);
} while (n);
goto repeat;
}
mutex_unlock(&dir->i_mutex);
}
static int
rpc_populate(struct dentry *parent,
struct rpc_filelist *files,
int start, int eof)
{
struct inode *inode, *dir = parent->d_inode;
void *private = RPC_I(dir)->private;
struct dentry *dentry;
int mode, i;
mutex_lock(&dir->i_mutex);
for (i = start; i < eof; i++) {
dentry = d_alloc_name(parent, files[i].name);
if (!dentry)
goto out_bad;
dentry->d_op = &rpc_dentry_operations;
mode = files[i].mode;
inode = rpc_get_inode(dir->i_sb, mode);
if (!inode) {
dput(dentry);
goto out_bad;
}
inode->i_ino = i;
if (files[i].i_fop)
inode->i_fop = files[i].i_fop;
if (private)
rpc_inode_setowner(inode, private);
if (S_ISDIR(mode))
inc_nlink(dir);
d_add(dentry, inode);
fsnotify_create(dir, dentry);
}
mutex_unlock(&dir->i_mutex);
return 0;
out_bad:
mutex_unlock(&dir->i_mutex);
printk(KERN_WARNING "%s: %s failed to populate directory %s\n",
__FILE__, __func__, parent->d_name.name);
return -ENOMEM;
}
static int
__rpc_mkdir(struct inode *dir, struct dentry *dentry)
static int __rpc_create_common(struct inode *dir, struct dentry *dentry,
umode_t mode,
const struct file_operations *i_fop,
void *private)
{
struct inode *inode;
inode = rpc_get_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO);
BUG_ON(!d_unhashed(dentry));
inode = rpc_get_inode(dir->i_sb, mode);
if (!inode)
goto out_err;
inode->i_ino = iunique(dir->i_sb, 100);
d_instantiate(dentry, inode);
inc_nlink(dir);
fsnotify_mkdir(dir, dentry);
if (i_fop)
inode->i_fop = i_fop;
if (private)
rpc_inode_setowner(inode, private);
d_add(dentry, inode);
return 0;
out_err:
printk(KERN_WARNING "%s: %s failed to allocate inode for dentry %s\n",
__FILE__, __func__, dentry->d_name.name);
dput(dentry);
return -ENOMEM;
}
static int
__rpc_rmdir(struct inode *dir, struct dentry *dentry)
static int __rpc_create(struct inode *dir, struct dentry *dentry,
umode_t mode,
const struct file_operations *i_fop,
void *private)
{
int error;
error = simple_rmdir(dir, dentry);
if (!error)
d_delete(dentry);
return error;
int err;
err = __rpc_create_common(dir, dentry, S_IFREG | mode, i_fop, private);
if (err)
return err;
fsnotify_create(dir, dentry);
return 0;
}
static struct dentry *
rpc_lookup_create(struct dentry *parent, const char *name, int len, int exclusive)
static int __rpc_mkdir(struct inode *dir, struct dentry *dentry,
umode_t mode,
const struct file_operations *i_fop,
void *private)
{
int err;
err = __rpc_create_common(dir, dentry, S_IFDIR | mode, i_fop, private);
if (err)
return err;
inc_nlink(dir);
fsnotify_mkdir(dir, dentry);
return 0;
}
static int __rpc_mkpipe(struct inode *dir, struct dentry *dentry,
umode_t mode,
const struct file_operations *i_fop,
void *private,
const struct rpc_pipe_ops *ops,
int flags)
{
struct rpc_inode *rpci;
int err;
err = __rpc_create_common(dir, dentry, S_IFIFO | mode, i_fop, private);
if (err)
return err;
rpci = RPC_I(dentry->d_inode);
rpci->nkern_readwriters = 1;
rpci->private = private;
rpci->flags = flags;
rpci->ops = ops;
fsnotify_create(dir, dentry);
return 0;
}
static int __rpc_rmdir(struct inode *dir, struct dentry *dentry)
{
int ret;
dget(dentry);
ret = simple_rmdir(dir, dentry);
d_delete(dentry);
dput(dentry);
return ret;
}
static int __rpc_unlink(struct inode *dir, struct dentry *dentry)
{
int ret;
dget(dentry);
ret = simple_unlink(dir, dentry);
d_delete(dentry);
dput(dentry);
return ret;
}
static int __rpc_rmpipe(struct inode *dir, struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
struct rpc_inode *rpci = RPC_I(inode);
rpci->nkern_readwriters--;
if (rpci->nkern_readwriters != 0)
return 0;
rpc_close_pipes(inode);
return __rpc_unlink(dir, dentry);
}
static struct dentry *__rpc_lookup_create(struct dentry *parent,
struct qstr *name)
{
struct dentry *dentry;
dentry = d_lookup(parent, name);
if (!dentry) {
dentry = d_alloc(parent, name);
if (!dentry) {
dentry = ERR_PTR(-ENOMEM);
goto out_err;
}
}
if (!dentry->d_inode)
dentry->d_op = &rpc_dentry_operations;
out_err:
return dentry;
}
static struct dentry *__rpc_lookup_create_exclusive(struct dentry *parent,
struct qstr *name)
{
struct dentry *dentry;
dentry = __rpc_lookup_create(parent, name);
if (dentry->d_inode == NULL)
return dentry;
dput(dentry);
return ERR_PTR(-EEXIST);
}
/*
* FIXME: This probably has races.
*/
static void __rpc_depopulate(struct dentry *parent,
const struct rpc_filelist *files,
int start, int eof)
{
struct inode *dir = parent->d_inode;
struct dentry *dentry;
struct qstr name;
int i;
for (i = start; i < eof; i++) {
name.name = files[i].name;
name.len = strlen(files[i].name);
name.hash = full_name_hash(name.name, name.len);
dentry = d_lookup(parent, &name);
if (dentry == NULL)
continue;
if (dentry->d_inode == NULL)
goto next;
switch (dentry->d_inode->i_mode & S_IFMT) {
default:
BUG();
case S_IFREG:
__rpc_unlink(dir, dentry);
break;
case S_IFDIR:
__rpc_rmdir(dir, dentry);
}
next:
dput(dentry);
}
}
static void rpc_depopulate(struct dentry *parent,
const struct rpc_filelist *files,
int start, int eof)
{
struct inode *dir = parent->d_inode;
mutex_lock_nested(&dir->i_mutex, I_MUTEX_CHILD);
__rpc_depopulate(parent, files, start, eof);
mutex_unlock(&dir->i_mutex);
}
static int rpc_populate(struct dentry *parent,
const struct rpc_filelist *files,
int start, int eof,
void *private)
{
struct inode *dir = parent->d_inode;
struct dentry *dentry;
int i, err;
mutex_lock(&dir->i_mutex);
for (i = start; i < eof; i++) {
struct qstr q;
q.name = files[i].name;
q.len = strlen(files[i].name);
q.hash = full_name_hash(q.name, q.len);
dentry = __rpc_lookup_create_exclusive(parent, &q);
err = PTR_ERR(dentry);
if (IS_ERR(dentry))
goto out_bad;
switch (files[i].mode & S_IFMT) {
default:
BUG();
case S_IFREG:
err = __rpc_create(dir, dentry,
files[i].mode,
files[i].i_fop,
private);
break;
case S_IFDIR:
err = __rpc_mkdir(dir, dentry,
files[i].mode,
NULL,
private);
}
if (err != 0)
goto out_bad;
}
mutex_unlock(&dir->i_mutex);
return 0;
out_bad:
__rpc_depopulate(parent, files, start, eof);
mutex_unlock(&dir->i_mutex);
printk(KERN_WARNING "%s: %s failed to populate directory %s\n",
__FILE__, __func__, parent->d_name.name);
return err;
}
static struct dentry *rpc_mkdir_populate(struct dentry *parent,
struct qstr *name, umode_t mode, void *private,
int (*populate)(struct dentry *, void *), void *args_populate)
{
struct dentry *dentry;
struct inode *dir = parent->d_inode;
int error;
mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
dentry = lookup_one_len(name, parent, len);
dentry = __rpc_lookup_create_exclusive(parent, name);
if (IS_ERR(dentry))
goto out;
error = __rpc_mkdir(dir, dentry, mode, NULL, private);
if (error != 0)
goto out_err;
if (!dentry->d_inode)
dentry->d_op = &rpc_dentry_operations;
else if (exclusive) {
dput(dentry);
dentry = ERR_PTR(-EEXIST);
goto out_err;
if (populate != NULL) {
error = populate(dentry, args_populate);
if (error)
goto err_rmdir;
}
return dentry;
out_err:
mutex_unlock(&dir->i_mutex);
return dentry;
}
static struct dentry *
rpc_lookup_negative(char *path, struct nameidata *nd)
{
struct dentry *dentry;
int error;
if ((error = rpc_lookup_parent(path, nd)) != 0)
return ERR_PTR(error);
dentry = rpc_lookup_create(nd->path.dentry, nd->last.name, nd->last.len,
1);
if (IS_ERR(dentry))
rpc_release_path(nd);
return dentry;
}
/**
* rpc_mkdir - Create a new directory in rpc_pipefs
* @path: path from the rpc_pipefs root to the new directory
* @rpc_client: rpc client to associate with this directory
*
* This creates a directory at the given @path associated with
* @rpc_clnt, which will contain a file named "info" with some basic
* information about the client, together with any "pipes" that may
* later be created using rpc_mkpipe().
*/
struct dentry *
rpc_mkdir(char *path, struct rpc_clnt *rpc_client)
{
struct nameidata nd;
struct dentry *dentry;
struct inode *dir;
int error;
dentry = rpc_lookup_negative(path, &nd);
if (IS_ERR(dentry))
return dentry;
dir = nd.path.dentry->d_inode;
if ((error = __rpc_mkdir(dir, dentry)) != 0)
goto err_dput;
RPC_I(dentry->d_inode)->private = rpc_client;
error = rpc_populate(dentry, authfiles,
RPCAUTH_info, RPCAUTH_EOF);
if (error)
goto err_depopulate;
dget(dentry);
out:
mutex_unlock(&dir->i_mutex);
rpc_release_path(&nd);
return dentry;
err_depopulate:
rpc_depopulate(dentry, RPCAUTH_info, RPCAUTH_EOF);
err_rmdir:
__rpc_rmdir(dir, dentry);
err_dput:
dput(dentry);
printk(KERN_WARNING "%s: %s() failed to create directory %s (errno = %d)\n",
__FILE__, __func__, path, error);
out_err:
dentry = ERR_PTR(error);
goto out;
}
/**
* rpc_rmdir - Remove a directory created with rpc_mkdir()
* @dentry: directory to remove
*/
int
rpc_rmdir(struct dentry *dentry)
static int rpc_rmdir_depopulate(struct dentry *dentry,
void (*depopulate)(struct dentry *))
{
struct dentry *parent;
struct inode *dir;
@ -748,9 +726,9 @@ rpc_rmdir(struct dentry *dentry)
parent = dget_parent(dentry);
dir = parent->d_inode;
mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
rpc_depopulate(dentry, RPCAUTH_info, RPCAUTH_EOF);
if (depopulate != NULL)
depopulate(dentry);
error = __rpc_rmdir(dir, dentry);
dput(dentry);
mutex_unlock(&dir->i_mutex);
dput(parent);
return error;
@ -776,50 +754,54 @@ rpc_rmdir(struct dentry *dentry)
* The @private argument passed here will be available to all these methods
* from the file pointer, via RPC_I(file->f_dentry->d_inode)->private.
*/
struct dentry *
rpc_mkpipe(struct dentry *parent, const char *name, void *private, struct rpc_pipe_ops *ops, int flags)
struct dentry *rpc_mkpipe(struct dentry *parent, const char *name,
void *private, const struct rpc_pipe_ops *ops,
int flags)
{
struct dentry *dentry;
struct inode *dir, *inode;
struct rpc_inode *rpci;
struct inode *dir = parent->d_inode;
umode_t umode = S_IFIFO | S_IRUSR | S_IWUSR;
struct qstr q;
int err;
dentry = rpc_lookup_create(parent, name, strlen(name), 0);
if (ops->upcall == NULL)
umode &= ~S_IRUGO;
if (ops->downcall == NULL)
umode &= ~S_IWUGO;
q.name = name;
q.len = strlen(name);
q.hash = full_name_hash(q.name, q.len),
mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
dentry = __rpc_lookup_create(parent, &q);
if (IS_ERR(dentry))
return dentry;
dir = parent->d_inode;
goto out;
if (dentry->d_inode) {
rpci = RPC_I(dentry->d_inode);
struct rpc_inode *rpci = RPC_I(dentry->d_inode);
if (rpci->private != private ||
rpci->ops != ops ||
rpci->flags != flags) {
dput (dentry);
dentry = ERR_PTR(-EBUSY);
err = -EBUSY;
goto out_err;
}
rpci->nkern_readwriters++;
goto out;
}
inode = rpc_get_inode(dir->i_sb, S_IFIFO | S_IRUSR | S_IWUSR);
if (!inode)
goto err_dput;
inode->i_ino = iunique(dir->i_sb, 100);
inode->i_fop = &rpc_pipe_fops;
d_instantiate(dentry, inode);
rpci = RPC_I(inode);
rpci->private = private;
rpci->flags = flags;
rpci->ops = ops;
rpci->nkern_readwriters = 1;
fsnotify_create(dir, dentry);
dget(dentry);
err = __rpc_mkpipe(dir, dentry, umode, &rpc_pipe_fops,
private, ops, flags);
if (err)
goto out_err;
out:
mutex_unlock(&dir->i_mutex);
return dentry;
err_dput:
dput(dentry);
dentry = ERR_PTR(-ENOMEM);
out_err:
dentry = ERR_PTR(err);
printk(KERN_WARNING "%s: %s() failed to create pipe %s/%s (errno = %d)\n",
__FILE__, __func__, parent->d_name.name, name,
-ENOMEM);
err);
goto out;
}
EXPORT_SYMBOL_GPL(rpc_mkpipe);
@ -842,19 +824,107 @@ rpc_unlink(struct dentry *dentry)
parent = dget_parent(dentry);
dir = parent->d_inode;
mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
if (--RPC_I(dentry->d_inode)->nkern_readwriters == 0) {
rpc_close_pipes(dentry->d_inode);
error = simple_unlink(dir, dentry);
if (!error)
d_delete(dentry);
}
dput(dentry);
error = __rpc_rmpipe(dir, dentry);
mutex_unlock(&dir->i_mutex);
dput(parent);
return error;
}
EXPORT_SYMBOL_GPL(rpc_unlink);
enum {
RPCAUTH_info,
RPCAUTH_EOF
};
static const struct rpc_filelist authfiles[] = {
[RPCAUTH_info] = {
.name = "info",
.i_fop = &rpc_info_operations,
.mode = S_IFREG | S_IRUSR,
},
};
static int rpc_clntdir_populate(struct dentry *dentry, void *private)
{
return rpc_populate(dentry,
authfiles, RPCAUTH_info, RPCAUTH_EOF,
private);
}
static void rpc_clntdir_depopulate(struct dentry *dentry)
{
rpc_depopulate(dentry, authfiles, RPCAUTH_info, RPCAUTH_EOF);
}
/**
* rpc_create_client_dir - Create a new rpc_client directory in rpc_pipefs
* @path: path from the rpc_pipefs root to the new directory
* @rpc_client: rpc client to associate with this directory
*
* This creates a directory at the given @path associated with
* @rpc_clnt, which will contain a file named "info" with some basic
* information about the client, together with any "pipes" that may
* later be created using rpc_mkpipe().
*/
struct dentry *rpc_create_client_dir(struct dentry *dentry,
struct qstr *name,
struct rpc_clnt *rpc_client)
{
return rpc_mkdir_populate(dentry, name, S_IRUGO | S_IXUGO, NULL,
rpc_clntdir_populate, rpc_client);
}
/**
* rpc_remove_client_dir - Remove a directory created with rpc_create_client_dir()
* @dentry: directory to remove
*/
int rpc_remove_client_dir(struct dentry *dentry)
{
return rpc_rmdir_depopulate(dentry, rpc_clntdir_depopulate);
}
static const struct rpc_filelist cache_pipefs_files[3] = {
[0] = {
.name = "channel",
.i_fop = &cache_file_operations_pipefs,
.mode = S_IFIFO|S_IRUSR|S_IWUSR,
},
[1] = {
.name = "content",
.i_fop = &content_file_operations_pipefs,
.mode = S_IFREG|S_IRUSR,
},
[2] = {
.name = "flush",
.i_fop = &cache_flush_operations_pipefs,
.mode = S_IFREG|S_IRUSR|S_IWUSR,
},
};
static int rpc_cachedir_populate(struct dentry *dentry, void *private)
{
return rpc_populate(dentry,
cache_pipefs_files, 0, 3,
private);
}
static void rpc_cachedir_depopulate(struct dentry *dentry)
{
rpc_depopulate(dentry, cache_pipefs_files, 0, 3);
}
struct dentry *rpc_create_cache_dir(struct dentry *parent, struct qstr *name,
mode_t umode, struct cache_detail *cd)
{
return rpc_mkdir_populate(parent, name, umode, NULL,
rpc_cachedir_populate, cd);
}
void rpc_remove_cache_dir(struct dentry *dentry)
{
rpc_rmdir_depopulate(dentry, rpc_cachedir_depopulate);
}
/*
* populate the filesystem
*/
@ -866,6 +936,46 @@ static struct super_operations s_ops = {
#define RPCAUTH_GSSMAGIC 0x67596969
/*
* We have a single directory with 1 node in it.
*/
enum {
RPCAUTH_lockd,
RPCAUTH_mount,
RPCAUTH_nfs,
RPCAUTH_portmap,
RPCAUTH_statd,
RPCAUTH_nfsd4_cb,
RPCAUTH_RootEOF
};
static const struct rpc_filelist files[] = {
[RPCAUTH_lockd] = {
.name = "lockd",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
[RPCAUTH_mount] = {
.name = "mount",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
[RPCAUTH_nfs] = {
.name = "nfs",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
[RPCAUTH_portmap] = {
.name = "portmap",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
[RPCAUTH_statd] = {
.name = "statd",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
[RPCAUTH_nfsd4_cb] = {
.name = "nfsd4_cb",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
};
static int
rpc_fill_super(struct super_block *sb, void *data, int silent)
{
@ -886,7 +996,7 @@ rpc_fill_super(struct super_block *sb, void *data, int silent)
iput(inode);
return -ENOMEM;
}
if (rpc_populate(root, files, RPCAUTH_Root + 1, RPCAUTH_RootEOF))
if (rpc_populate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF, NULL))
goto out;
sb->s_root = root;
return 0;

14
net/sunrpc/svcauth_unix.c
View file

@ -171,6 +171,11 @@ static void ip_map_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall(cd, h, ip_map_request);
}
static struct ip_map *ip_map_lookup(char *class, struct in6_addr *addr);
static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
@ -289,7 +294,7 @@ struct cache_detail ip_map_cache = {
.hash_table = ip_table,
.name = "auth.unix.ip",
.cache_put = ip_map_put,
.cache_request = ip_map_request,
.cache_upcall = ip_map_upcall,
.cache_parse = ip_map_parse,
.cache_show = ip_map_show,
.match = ip_map_match,
@ -523,6 +528,11 @@ static void unix_gid_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall(cd, h, unix_gid_request);
}
static struct unix_gid *unix_gid_lookup(uid_t uid);
extern struct cache_detail unix_gid_cache;
@ -622,7 +632,7 @@ struct cache_detail unix_gid_cache = {
.hash_table = gid_table,
.name = "auth.unix.gid",
.cache_put = unix_gid_put,
.cache_request = unix_gid_request,
.cache_upcall = unix_gid_upcall,
.cache_parse = unix_gid_parse,
.cache_show = unix_gid_show,
.match = unix_gid_match,