Commit 5fec8bdb authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: clean up annotations of fc->lock
  fuse: fix sparse warning in ioctl
  fuse: update interface version
  fuse: add fuse_conn->release()
  fuse: separate out fuse_conn_init() from new_conn()
  fuse: add fuse_ prefix to several functions
  fuse: implement poll support
  fuse: implement unsolicited notification
  fuse: add file kernel handle
  fuse: implement ioctl support
  fuse: don't let fuse_req->end() put the base reference
  fuse: move FUSE_MINOR to miscdevice.h
  fuse: style fixes
parents 59e3af21 5d9ec854
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
......@@ -48,11 +48,13 @@ static ssize_t fuse_conn_waiting_read(struct file *file, char __user *buf,
size_t size;
if (!*ppos) {
long value;
struct fuse_conn *fc = fuse_ctl_file_conn_get(file);
if (!fc)
return 0;
file->private_data=(void *)(long)atomic_read(&fc->num_waiting);
value = atomic_read(&fc->num_waiting);
file->private_data = (void *)value;
fuse_conn_put(fc);
}
size = sprintf(tmp, "%ld\n", (long)file->private_data);
......
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
......@@ -269,7 +269,7 @@ static void flush_bg_queue(struct fuse_conn *fc)
* Called with fc->lock, unlocks it
*/
static void request_end(struct fuse_conn *fc, struct fuse_req *req)
__releases(fc->lock)
__releases(&fc->lock)
{
void (*end) (struct fuse_conn *, struct fuse_req *) = req->end;
req->end = NULL;
......@@ -293,13 +293,13 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
wake_up(&req->waitq);
if (end)
end(fc, req);
else
fuse_put_request(fc, req);
}
static void wait_answer_interruptible(struct fuse_conn *fc,
struct fuse_req *req)
__releases(fc->lock) __acquires(fc->lock)
__releases(&fc->lock)
__acquires(&fc->lock)
{
if (signal_pending(current))
return;
......@@ -317,7 +317,8 @@ static void queue_interrupt(struct fuse_conn *fc, struct fuse_req *req)
}
static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req)
__releases(fc->lock) __acquires(fc->lock)
__releases(&fc->lock)
__acquires(&fc->lock)
{
if (!fc->no_interrupt) {
/* Any signal may interrupt this */
......@@ -380,7 +381,7 @@ static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req)
}
}
void request_send(struct fuse_conn *fc, struct fuse_req *req)
void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req)
{
req->isreply = 1;
spin_lock(&fc->lock);
......@@ -399,7 +400,7 @@ void request_send(struct fuse_conn *fc, struct fuse_req *req)
spin_unlock(&fc->lock);
}
static void request_send_nowait_locked(struct fuse_conn *fc,
static void fuse_request_send_nowait_locked(struct fuse_conn *fc,
struct fuse_req *req)
{
req->background = 1;
......@@ -414,11 +415,11 @@ static void request_send_nowait_locked(struct fuse_conn *fc,
flush_bg_queue(fc);
}
static void request_send_nowait(struct fuse_conn *fc, struct fuse_req *req)
static void fuse_request_send_nowait(struct fuse_conn *fc, struct fuse_req *req)
{
spin_lock(&fc->lock);
if (fc->connected) {
request_send_nowait_locked(fc, req);
fuse_request_send_nowait_locked(fc, req);
spin_unlock(&fc->lock);
} else {
req->out.h.error = -ENOTCONN;
......@@ -426,16 +427,16 @@ static void request_send_nowait(struct fuse_conn *fc, struct fuse_req *req)
}
}
void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req)
void fuse_request_send_noreply(struct fuse_conn *fc, struct fuse_req *req)
{
req->isreply = 0;
request_send_nowait(fc, req);
fuse_request_send_nowait(fc, req);
}
void request_send_background(struct fuse_conn *fc, struct fuse_req *req)
void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req)
{
req->isreply = 1;
request_send_nowait(fc, req);
fuse_request_send_nowait(fc, req);
}
/*
......@@ -443,10 +444,11 @@ void request_send_background(struct fuse_conn *fc, struct fuse_req *req)
*
* fc->connected must have been checked previously
*/
void request_send_background_locked(struct fuse_conn *fc, struct fuse_req *req)
void fuse_request_send_background_locked(struct fuse_conn *fc,
struct fuse_req *req)
{
req->isreply = 1;
request_send_nowait_locked(fc, req);
fuse_request_send_nowait_locked(fc, req);
}
/*
......@@ -539,8 +541,8 @@ static int fuse_copy_fill(struct fuse_copy_state *cs)
BUG_ON(!cs->nr_segs);
cs->seglen = cs->iov[0].iov_len;
cs->addr = (unsigned long) cs->iov[0].iov_base;
cs->iov ++;
cs->nr_segs --;
cs->iov++;
cs->nr_segs--;
}
down_read(&current->mm->mmap_sem);
err = get_user_pages(current, current->mm, cs->addr, 1, cs->write, 0,
......@@ -589,9 +591,11 @@ static int fuse_copy_page(struct fuse_copy_state *cs, struct page *page,
kunmap_atomic(mapaddr, KM_USER1);
}
while (count) {
int err;
if (!cs->len && (err = fuse_copy_fill(cs)))
if (!cs->len) {
int err = fuse_copy_fill(cs);
if (err)
return err;
}
if (page) {
void *mapaddr = kmap_atomic(page, KM_USER1);
void *buf = mapaddr + offset;
......@@ -631,9 +635,11 @@ static int fuse_copy_pages(struct fuse_copy_state *cs, unsigned nbytes,
static int fuse_copy_one(struct fuse_copy_state *cs, void *val, unsigned size)
{
while (size) {
int err;
if (!cs->len && (err = fuse_copy_fill(cs)))
if (!cs->len) {
int err = fuse_copy_fill(cs);
if (err)
return err;
}
fuse_copy_do(cs, &val, &size);
}
return 0;
......@@ -664,6 +670,8 @@ static int request_pending(struct fuse_conn *fc)
/* Wait until a request is available on the pending list */
static void request_wait(struct fuse_conn *fc)
__releases(&fc->lock)
__acquires(&fc->lock)
{
DECLARE_WAITQUEUE(wait, current);
......@@ -691,7 +699,7 @@ static void request_wait(struct fuse_conn *fc)
*/
static int fuse_read_interrupt(struct fuse_conn *fc, struct fuse_req *req,
const struct iovec *iov, unsigned long nr_segs)
__releases(fc->lock)
__releases(&fc->lock)
{
struct fuse_copy_state cs;
struct fuse_in_header ih;
......@@ -813,6 +821,34 @@ static ssize_t fuse_dev_read(struct kiocb *iocb, const struct iovec *iov,
return err;
}
static int fuse_notify_poll(struct fuse_conn *fc, unsigned int size,
struct fuse_copy_state *cs)
{
struct fuse_notify_poll_wakeup_out outarg;
int err;
if (size != sizeof(outarg))
return -EINVAL;
err = fuse_copy_one(cs, &outarg, sizeof(outarg));
if (err)
return err;
return fuse_notify_poll_wakeup(fc, &outarg);
}
static int fuse_notify(struct fuse_conn *fc, enum fuse_notify_code code,
unsigned int size, struct fuse_copy_state *cs)
{
switch (code) {
case FUSE_NOTIFY_POLL:
return fuse_notify_poll(fc, size, cs);
default:
return -EINVAL;
}
}
/* Look up request on processing list by unique ID */
static struct fuse_req *request_find(struct fuse_conn *fc, u64 unique)
{
......@@ -876,9 +912,23 @@ static ssize_t fuse_dev_write(struct kiocb *iocb, const struct iovec *iov,
err = fuse_copy_one(&cs, &oh, sizeof(oh));
if (err)
goto err_finish;
err = -EINVAL;
if (!oh.unique || oh.error <= -1000 || oh.error > 0 ||
oh.len != nbytes)
if (oh.len != nbytes)
goto err_finish;
/*
* Zero oh.unique indicates unsolicited notification message
* and error contains notification code.
*/
if (!oh.unique) {
err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), &cs);
fuse_copy_finish(&cs);
return err ? err : nbytes;
}
err = -EINVAL;
if (oh.error <= -1000 || oh.error > 0)
goto err_finish;
spin_lock(&fc->lock);
......@@ -966,6 +1016,8 @@ static unsigned fuse_dev_poll(struct file *file, poll_table *wait)
* This function releases and reacquires fc->lock
*/
static void end_requests(struct fuse_conn *fc, struct list_head *head)
__releases(&fc->lock)
__acquires(&fc->lock)
{
while (!list_empty(head)) {
struct fuse_req *req;
......@@ -988,7 +1040,8 @@ static void end_requests(struct fuse_conn *fc, struct list_head *head)
* locked).
*/
static void end_io_requests(struct fuse_conn *fc)
__releases(fc->lock) __acquires(fc->lock)
__releases(&fc->lock)
__acquires(&fc->lock)
{
while (!list_empty(&fc->io)) {
struct fuse_req *req =
......@@ -1002,11 +1055,11 @@ static void end_io_requests(struct fuse_conn *fc)
wake_up(&req->waitq);
if (end) {
req->end = NULL;
/* The end function will consume this reference */
__fuse_get_request(req);
spin_unlock(&fc->lock);
wait_event(req->waitq, !req->locked);
end(fc, req);
fuse_put_request(fc, req);
spin_lock(&fc->lock);
}
}
......
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
......@@ -189,7 +189,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
parent = dget_parent(entry);
fuse_lookup_init(fc, req, get_node_id(parent->d_inode),
&entry->d_name, &outarg);
request_send(fc, req);
fuse_request_send(fc, req);
dput(parent);
err = req->out.h.error;
fuse_put_request(fc, req);
......@@ -204,7 +204,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
return 0;
}
spin_lock(&fc->lock);
fi->nlookup ++;
fi->nlookup++;
spin_unlock(&fc->lock);
}
fuse_put_request(fc, forget_req);
......@@ -283,7 +283,7 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name,
attr_version = fuse_get_attr_version(fc);
fuse_lookup_init(fc, req, nodeid, name, outarg);
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
/* Zero nodeid is same as -ENOENT, but with valid timeout */
......@@ -369,7 +369,7 @@ static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff,
{
fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE);
ff->reserved_req->force = 1;
request_send(fc, ff->reserved_req);
fuse_request_send(fc, ff->reserved_req);
fuse_put_request(fc, ff->reserved_req);
kfree(ff);
}
......@@ -408,7 +408,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
goto out_put_forget_req;
err = -ENOMEM;
ff = fuse_file_alloc();
ff = fuse_file_alloc(fc);
if (!ff)
goto out_put_request;
......@@ -432,7 +432,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
req->out.args[0].value = &outentry;
req->out.args[1].size = sizeof(outopen);
req->out.args[1].value = &outopen;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
if (err) {
if (err == -ENOSYS)
......@@ -502,7 +502,7 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
else
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err)
......@@ -631,15 +631,17 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry)
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
struct inode *inode = entry->d_inode;
/* Set nlink to zero so the inode can be cleared, if
the inode does have more links this will be
discovered at the next lookup/getattr */
/*
* Set nlink to zero so the inode can be cleared, if the inode
* does have more links this will be discovered at the next
* lookup/getattr.
*/
clear_nlink(inode);
fuse_invalidate_attr(inode);
fuse_invalidate_attr(dir);
......@@ -662,7 +664,7 @@ static int fuse_rmdir(struct inode *dir, struct dentry *entry)
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
......@@ -695,7 +697,7 @@ static int fuse_rename(struct inode *olddir, struct dentry *oldent,
req->in.args[1].value = oldent->d_name.name;
req->in.args[2].size = newent->d_name.len + 1;
req->in.args[2].value = newent->d_name.name;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
......@@ -811,7 +813,7 @@ static int fuse_do_getattr(struct inode *inode, struct kstat *stat,
else
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
......@@ -911,7 +913,7 @@ static int fuse_access(struct inode *inode, int mask)
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS) {
......@@ -1033,7 +1035,7 @@ static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
req->num_pages = 1;
req->pages[0] = page;
fuse_read_fill(req, file, inode, file->f_pos, PAGE_SIZE, FUSE_READDIR);
request_send(fc, req);
fuse_request_send(fc, req);
nbytes = req->out.args[0].size;
err = req->out.h.error;
fuse_put_request(fc, req);
......@@ -1067,7 +1069,7 @@ static char *read_link(struct dentry *dentry)
req->out.numargs = 1;
req->out.args[0].size = PAGE_SIZE - 1;
req->out.args[0].value = link;
request_send(fc, req);
fuse_request_send(fc, req);
if (req->out.h.error) {
free_page((unsigned long) link);
link = ERR_PTR(req->out.h.error);
......@@ -1273,7 +1275,7 @@ static int fuse_do_setattr(struct dentry *entry, struct iattr *attr,
else
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err) {
......@@ -1367,7 +1369,7 @@ static int fuse_setxattr(struct dentry *entry, const char *name,
req->in.args[1].value = name;
req->in.args[2].size = size;
req->in.args[2].value = value;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS) {
......@@ -1413,7 +1415,7 @@ static ssize_t fuse_getxattr(struct dentry *entry, const char *name,
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
}
request_send(fc, req);
fuse_request_send(fc, req);
ret = req->out.h.error;
if (!ret)
ret = size ? req->out.args[0].size : outarg.size;
......@@ -1463,7 +1465,7 @@ static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
}
request_send(fc, req);
fuse_request_send(fc, req);
ret = req->out.h.error;
if (!ret)
ret = size ? req->out.args[0].size : outarg.size;
......@@ -1496,7 +1498,7 @@ static int fuse_removexattr(struct dentry *entry, const char *name)
req->in.numargs = 1;
req->in.args[0].size = strlen(name) + 1;
req->in.args[0].value = name;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS) {
......
This diff is collapsed.
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
......@@ -19,6 +19,8 @@
#include <linux/backing-dev.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
#include <linux/rbtree.h>
#include <linux/poll.h>
/** Max number of pages that can be used in a single read request */
#define FUSE_MAX_PAGES_PER_REQ 32
......@@ -100,6 +102,9 @@ struct fuse_file {
/** Request reserved for flush and release */
struct fuse_req *reserved_req;
/** Kernel file handle guaranteed to be unique */
u64 kh;
/** File handle used by userspace */
u64 fh;
......@@ -108,6 +113,12 @@ struct fuse_file {
/** Entry on inode's write_files list */
struct list_head write_entry;
/** RB node to be linked on fuse_conn->polled_files */
struct rb_node polled_node;
/** Wait queue head for poll */
wait_queue_head_t poll_wait;
};
/** One input argument of a request */
......@@ -322,6 +333,12 @@ struct fuse_conn {
/** The list of requests under I/O */
struct list_head io;
/** The next unique kernel file handle */
u64 khctr;
/** rbtree of fuse_files waiting for poll events indexed by ph */
struct rb_root polled_files;
/** Number of requests currently in the background */
unsigned num_background;
......@@ -355,19 +372,19 @@ struct fuse_conn {
/** Connection failed (version mismatch). Cannot race with
setting other bitfields since it is only set once in INIT
reply, before any other request, and never cleared */
unsigned conn_error : 1;
unsigned conn_error:1;
/** Connection successful. Only set in INIT */
unsigned conn_init : 1;
unsigned conn_init:1;
/** Do readpages asynchronously? Only set in INIT */
unsigned async_read : 1;
unsigned async_read:1;
/** Do not send separate SETATTR request before open(O_TRUNC) */
unsigned atomic_o_trunc : 1;
unsigned atomic_o_trunc:1;
/** Filesystem supports NFS exporting. Only set in INIT */
unsigned export_support : 1;
unsigned export_support:1;
/*
* The following bitfields are only for optimization purposes
......@@ -375,43 +392,46 @@ struct fuse_conn {
*/
/** Is fsync not implemented by fs? */
unsigned no_fsync : 1;
unsigned no_fsync:1;
/** Is fsyncdir not implemented by fs? */
unsigned no_fsyncdir : 1;
unsigned no_fsyncdir:1;
/** Is flush not implemented by fs? */
unsigned no_flush : 1;
unsigned no_flush:1;
/** Is setxattr not implemented by fs? */
unsigned no_setxattr : 1;
unsigned no_setxattr:1;
/** Is getxattr not implemented by fs? */
unsigned no_getxattr : 1;
unsigned no_getxattr:1;
/** Is listxattr not implemented by fs? */
unsigned no_listxattr : 1;
unsigned no_listxattr:1;
/** Is removexattr not implemented by fs? */
unsigned no_removexattr : 1;
unsigned no_removexattr:1;
/** Are file locking primitives not implemented by fs? */
unsigned no_lock : 1;
unsigned no_lock:1;
/** Is access not implemented by fs? */
unsigned no_access : 1;
unsigned no_access:1;
/** Is create not implemented by fs? */
unsigned no_create : 1;
unsigned no_create:1;
/** Is interrupt not implemented by fs? */
unsigned no_interrupt : 1;
unsigned no_interrupt:1;
/** Is bmap not implemented by fs? */
unsigned no_bmap : 1;
unsigned no_bmap:1;
/** Is poll not implemented by fs? */
unsigned no_poll:1;
/** Do multi-page cached writes */
unsigned big_writes : 1;
unsigned big_writes:1;
/** The number of requests waiting for completion */
atomic_t num_waiting;
......@@ -445,6 +465,9 @@ struct fuse_conn {
/** Version counter for attribute changes */
u64 attr_version;
/** Called on final put */
void (*release)(struct fuse_conn *);
};
static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
......@@ -499,7 +522,7 @@ void fuse_read_fill(struct fuse_req *req, struct file *file,
*/
int fuse_open_common(struct inode *inode, struct file *file, int isdir);
struct fuse_file *fuse_file_alloc(void);
struct fuse_file *fuse_file_alloc(struct fuse_conn *fc);
void fuse_file_free(struct fuse_file *ff);
void fuse_finish_open(struct inode *inode, struct file *file,
struct fuse_file *ff, struct fuse_open_out *outarg);
......@@ -518,6 +541,12 @@ int fuse_release_common(struct inode *inode, struct file *file, int isdir);
int fuse_fsync_common(struct file *file, struct dentry *de, int datasync,
int isdir);
/**
* Notify poll wakeup
*/
int fuse_notify_poll_wakeup(struct fuse_conn *fc,
struct fuse_notify_poll_wakeup_out *outarg);
/**
* Initialize file operations on a regular file
*/
......@@ -593,19 +622,20 @@ void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req);
/**
* Send a request (synchronous)
*/
void request_send(struct fuse_conn *fc, struct fuse_req *req);
void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req);
/**
* Send a request with no reply
*/
void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req);
void fuse_request_send_noreply(struct fuse_conn *fc, struct fuse_req *req);
/**
* Send a request in the background
*/
void request_send_background(struct fuse_conn *fc, struct fuse_req *req);
void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req);
void request_send_background_locked(struct fuse_conn *fc, struct fuse_req *req);
void fuse_request_send_background_locked(struct fuse_conn *fc,
struct fuse_req *req);
/* Abort all requests */
void fuse_abort_conn(struct fuse_conn *fc);
......@@ -622,6 +652,11 @@ void fuse_invalidate_entry_cache(struct dentry *entry);
*/
struct fuse_conn *fuse_conn_get(struct fuse_conn *fc);
/**
* Initialize fuse_conn
*/
int fuse_conn_init(struct fuse_conn *fc, struct super_block *sb);
/**
* Release reference to fuse_conn
*/
......
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
......@@ -37,10 +37,10 @@ struct fuse_mount_data {
unsigned rootmode;
unsigned user_id;
unsigned group_id;
unsigned fd_present : 1;
unsigned rootmode_present : 1;
unsigned user_id_present : 1;
unsigned group_id_present : 1;
unsigned fd_present:1;
unsigned rootmode_present:1;
unsigned user_id_present:1;
unsigned group_id_present:1;
unsigned flags;
unsigned max_read;
unsigned blksize;
......@@ -94,7 +94,7 @@ void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req,
req->in.numargs = 1;
req->in.args[0].size = sizeof(struct fuse_forget_in);
req->in.args[0].value = inarg;
request_send_noreply(fc, req);
fuse_request_send_noreply(fc, req);
}
static void fuse_clear_inode(struct inode *inode)
......@@ -250,7 +250,7 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
fi = get_fuse_inode(inode);
spin_lock(&fc->lock);
fi->nlookup ++;
fi->nlookup++;
spin_unlock(&fc->lock);
fuse_change_attributes(inode, attr, attr_valid, attr_version);
......@@ -269,7 +269,7 @@ static void fuse_send_destroy(struct fuse_conn *fc)
fc->destroy_req = NULL;
req->in.h.opcode = FUSE_DESTROY;
req->force = 1;
request_send(fc, req);
fuse_request_send(fc, req);
fuse_put_request(fc, req);
}
}
......@@ -334,7 +334,7 @@ static int fuse_statfs(struct dentry *dentry, struct kstatfs *buf)
req->out.args[0].size =
fc->minor < 4 ? FUSE_COMPAT_STATFS_SIZE : sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
fuse_request_send(fc, req);
err = req->out.h.error;
if (!err)
convert_fuse_statfs(buf, &outarg.st);
......@@ -462,13 +462,11 @@ static int fuse_show_options(struct seq_file *m, struct vfsmount *mnt)
return 0;
}
static struct fuse_conn *new_conn(struct super_block *sb)
int fuse_conn_init(struct fuse_conn *fc, struct super_block *sb)
{
struct fuse_conn *fc;
int err;
fc = kzalloc(sizeof(*fc), GFP_KERNEL);
if (fc) {
memset(fc, 0, sizeof(*fc));
spin_lock_init(&fc->lock);
mutex_init(&fc->inst_mutex);
atomic_set(&fc->count, 1);
......@@ -480,15 +478,18 @@ static struct fuse_conn *new_conn(struct super_block *sb)
INIT_LIST_HEAD(&fc->io);
INIT_LIST_HEAD(&fc->interrupts);
INIT_LIST_HEAD(&fc->bg_queue);
INIT_LIST_HEAD(&fc->entry);
atomic_set(&fc->num_waiting, 0);
fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
fc->bdi.unplug_io_fn = default_unplug_io_fn;
/* fuse does it's own writeback accounting */
fc->bdi.capabilities = BDI_CAP_NO_ACCT_WB;
fc->khctr = 0;
fc->polled_files = RB_ROOT;
fc->dev = sb->s_dev;
err = bdi_init(&fc->bdi);
if (err)
goto error_kfree;
goto error_mutex_destroy;
if (sb->s_bdev) {
err = bdi_register(&fc->bdi, NULL, "%u:%u-fuseblk",
MAJOR(fc->dev), MINOR(fc->dev));
......@@ -514,16 +515,16 @@ static struct fuse_conn *new_conn(struct super_block *sb)
fc->blocked = 1;
fc->attr_version = 1;
get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
}
return fc;
error_bdi_destroy:
return 0;
error_bdi_destroy:
bdi_destroy(&fc->bdi);
error_kfree:
error_mutex_destroy:
mutex_destroy(&fc->inst_mutex);
kfree(fc);
return NULL;
return err;
}
EXPORT_SYMBOL_GPL(fuse_conn_init);
void fuse_conn_put(struct fuse_conn *fc)
{
......@@ -532,7 +533,7 @@ void fuse_conn_put(struct fuse_conn *fc)
fuse_request_free(fc->destroy_req);
mutex_destroy(&fc->inst_mutex);
bdi_destroy(&fc->bdi);
kfree(fc);
fc->release(fc);
}
}
......@@ -542,7 +543,7 @@ struct fuse_conn *fuse_conn_get(struct fuse_conn *fc)
return fc;
}
static struct inode *get_root_inode(struct super_block *sb, unsigned mode)
static struct inode *fuse_get_root_inode(struct super_block *sb, unsigned mode)
{
struct fuse_attr attr;
memset(&attr, 0, sizeof(attr));
......@@ -553,8 +554,7 @@ static struct inode *get_root_inode(struct super_block *sb, unsigned mode)
return fuse_iget(sb, 1, 0, &attr, 0, 0);
}
struct fuse_inode_handle
{
struct fuse_inode_handle {
u64 nodeid;
u32 generation;
};
......@@ -761,7 +761,6 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
fc->max_write = max_t(unsigned, 4096, fc->max_write);
fc->conn_init = 1;
}
fuse_put_request(fc, req);
fc->blocked = 0;
wake_up_all(&fc->blocked_waitq);
}
......@@ -787,7 +786,12 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
req->out.args[0].size = sizeof(struct fuse_init_out);
req->out.args[0].value = &req->misc.init_out;
req->end = process_init_reply;
request_send_background(fc, req);
fuse_request_send_background(fc, req);
}
static void fuse_free_conn(struct fuse_conn *fc)
{
kfree(fc);
}
static int fuse_fill_super(struct super_block *sb, void *data, int silent)
......@@ -828,10 +832,17 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
if (file->f_op != &fuse_dev_operations)
return -EINVAL;
fc = new_conn(sb);
fc = kmalloc(sizeof(*fc), GFP_KERNEL);
if (!fc)
return -ENOMEM;
err = fuse_conn_init(fc, sb);
if (err) {
kfree(fc);
return err;
}
fc->release = fuse_free_conn;
fc->flags = d.flags;
fc->user_id = d.user_id;
fc->group_id = d.group_id;
......@@ -841,7 +852,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
sb->s_fs_info = fc;
err = -ENOMEM;
root = get_root_inode(sb, d.rootmode);
root = fuse_get_root_inode(sb, d.rootmode);
if (!root)
goto err;
......@@ -952,7 +963,7 @@ static inline void unregister_fuseblk(void)
static void fuse_inode_init_once(void *foo)
{
struct inode * inode = foo;
struct inode *inode = foo;
inode_init_once(inode);
}
......@@ -1031,7 +1042,7 @@ static int __init fuse_init(void)
{
int res;
printk("fuse init (API version %i.%i)\n",
printk(KERN_INFO "fuse init (API version %i.%i)\n",
FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
INIT_LIST_HEAD(&fuse_conn_list);
......
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
......@@ -20,29 +20,27 @@
*
* 7.10
* - add nonseekable open flag
*
* 7.11
* - add IOCTL message
* - add unsolicited notification support
* - add POLL message and NOTIFY_POLL notification
*/
#ifndef _LINUX_FUSE_H
#define _LINUX_FUSE_H
#include <asm/types.h>
#include <linux/major.h>
#include <linux/types.h>
/** Version number of this interface */
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
#define FUSE_KERNEL_MINOR_VERSION 10
#define FUSE_KERNEL_MINOR_VERSION 11
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
/** The major number of the fuse character device */
#define FUSE_MAJOR MISC_MAJOR
/** The minor number of the fuse character device */
#define FUSE_MINOR 229
/* Make sure all structures are padded to 64bit boundary, so 32bit
userspace works under 64bit kernels */
......@@ -151,6 +149,28 @@ struct fuse_file_lock {
*/
#define FUSE_READ_LOCKOWNER (1 << 1)
/**
* Ioctl flags
*
* FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
* FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
* FUSE_IOCTL_RETRY: retry with new iovecs
*
* FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
*/
#define FUSE_IOCTL_COMPAT (1 << 0)
#define FUSE_IOCTL_UNRESTRICTED (1 << 1)
#define FUSE_IOCTL_RETRY (1 << 2)
#define FUSE_IOCTL_MAX_IOV 256
/**
* Poll flags
*
* FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
*/
#define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
enum fuse_opcode {
FUSE_LOOKUP = 1,
FUSE_FORGET = 2, /* no reply */
......@@ -188,6 +208,13 @@ enum fuse_opcode {
FUSE_INTERRUPT = 36,
FUSE_BMAP = 37,
FUSE_DESTROY = 38,
FUSE_IOCTL = 39,
FUSE_POLL = 40,
};
enum fuse_notify_code {
FUSE_NOTIFY_POLL = 1,
FUSE_NOTIFY_CODE_MAX,
};
/* The read buffer is required to be at least 8k, but may be much larger */
......@@ -388,6 +415,38 @@ struct fuse_bmap_out {
__u64 block;
};
struct fuse_ioctl_in {
__u64 fh;
__u32 flags;
__u32 cmd;
__u64 arg;
__u32 in_size;
__u32 out_size;
};
struct fuse_ioctl_out {
__s32 result;
__u32 flags;
__u32 in_iovs;
__u32 out_iovs;
};
struct fuse_poll_in {
__u64 fh;
__u64 kh;
__u32 flags;
__u32 padding;
};
struct fuse_poll_out {
__u32 revents;
__u32 padding;
};
struct fuse_notify_poll_wakeup_out {
__u64 kh;
};
struct fuse_in_header {
__u32 len;
__u32 opcode;
......
......@@ -23,13 +23,13 @@
#define STORE_QUEUE_MINOR 155
#define I2O_MINOR 166
#define MICROCODE_MINOR 184
#define TUN_MINOR 200
#define MWAVE_MINOR 219 /* ACP/Mwave Modem */
#define MPT_MINOR 220
#define MISC_DYNAMIC_MINOR 255
#define TUN_MINOR 200
#define HPET_MINOR 228
#define FUSE_MINOR 229
#define KVM_MINOR 232
#define MISC_DYNAMIC_MINOR 255
struct device;
......
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