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: check size of FUSE_NOTIFY_INVAL_ENTRY message
  fuse: mark pages accessed when written to
  fuse: delete dead .write_begin and .write_end aops
  fuse: fix flock
  fuse: fix non-ANSI void function notation
This commit is contained in:
Linus Torvalds 2011-08-24 09:14:42 -07:00
commit 051732bcbe
5 changed files with 40 additions and 75 deletions

View file

@ -1358,6 +1358,10 @@ static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size,
if (outarg.namelen > FUSE_NAME_MAX)
goto err;
err = -EINVAL;
if (size != sizeof(outarg) + outarg.namelen + 1)
goto err;
name.name = buf;
name.len = outarg.namelen;
err = fuse_copy_one(cs, buf, outarg.namelen + 1);

View file

@ -14,6 +14,7 @@
#include <linux/sched.h>
#include <linux/module.h>
#include <linux/compat.h>
#include <linux/swap.h>
static const struct file_operations fuse_direct_io_file_operations;
@ -245,6 +246,12 @@ void fuse_release_common(struct file *file, int opcode)
req = ff->reserved_req;
fuse_prepare_release(ff, file->f_flags, opcode);
if (ff->flock) {
struct fuse_release_in *inarg = &req->misc.release.in;
inarg->release_flags |= FUSE_RELEASE_FLOCK_UNLOCK;
inarg->lock_owner = fuse_lock_owner_id(ff->fc,
(fl_owner_t) file);
}
/* Hold vfsmount and dentry until release is finished */
path_get(&file->f_path);
req->misc.release.path = file->f_path;
@ -755,18 +762,6 @@ static size_t fuse_send_write(struct fuse_req *req, struct file *file,
return req->misc.write.out.size;
}
static int fuse_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
pgoff_t index = pos >> PAGE_CACHE_SHIFT;
*pagep = grab_cache_page_write_begin(mapping, index, flags);
if (!*pagep)
return -ENOMEM;
return 0;
}
void fuse_write_update_size(struct inode *inode, loff_t pos)
{
struct fuse_conn *fc = get_fuse_conn(inode);
@ -779,62 +774,6 @@ void fuse_write_update_size(struct inode *inode, loff_t pos)
spin_unlock(&fc->lock);
}
static int fuse_buffered_write(struct file *file, struct inode *inode,
loff_t pos, unsigned count, struct page *page)
{
int err;
size_t nres;
struct fuse_conn *fc = get_fuse_conn(inode);
unsigned offset = pos & (PAGE_CACHE_SIZE - 1);
struct fuse_req *req;
if (is_bad_inode(inode))
return -EIO;
/*
* Make sure writepages on the same page are not mixed up with
* plain writes.
*/
fuse_wait_on_page_writeback(inode, page->index);
req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
req->in.argpages = 1;
req->num_pages = 1;
req->pages[0] = page;
req->page_offset = offset;
nres = fuse_send_write(req, file, pos, count, NULL);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err && !nres)
err = -EIO;
if (!err) {
pos += nres;
fuse_write_update_size(inode, pos);
if (count == PAGE_CACHE_SIZE)
SetPageUptodate(page);
}
fuse_invalidate_attr(inode);
return err ? err : nres;
}
static int fuse_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata)
{
struct inode *inode = mapping->host;
int res = 0;
if (copied)
res = fuse_buffered_write(file, inode, pos, copied, page);
unlock_page(page);
page_cache_release(page);
return res;
}
static size_t fuse_send_write_pages(struct fuse_req *req, struct file *file,
struct inode *inode, loff_t pos,
size_t count)
@ -908,6 +847,8 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req,
pagefault_enable();
flush_dcache_page(page);
mark_page_accessed(page);
if (!tmp) {
unlock_page(page);
page_cache_release(page);
@ -1559,11 +1500,14 @@ static int fuse_file_flock(struct file *file, int cmd, struct file_lock *fl)
struct fuse_conn *fc = get_fuse_conn(inode);
int err;
if (fc->no_lock) {
if (fc->no_flock) {
err = flock_lock_file_wait(file, fl);
} else {
struct fuse_file *ff = file->private_data;
/* emulate flock with POSIX locks */
fl->fl_owner = (fl_owner_t) file;
ff->flock = true;
err = fuse_setlk(file, fl, 1);
}
@ -2201,8 +2145,6 @@ static const struct address_space_operations fuse_file_aops = {
.readpage = fuse_readpage,
.writepage = fuse_writepage,
.launder_page = fuse_launder_page,
.write_begin = fuse_write_begin,
.write_end = fuse_write_end,
.readpages = fuse_readpages,
.set_page_dirty = __set_page_dirty_nobuffers,
.bmap = fuse_bmap,

View file

@ -135,6 +135,9 @@ struct fuse_file {
/** Wait queue head for poll */
wait_queue_head_t poll_wait;
/** Has flock been performed on this file? */
bool flock:1;
};
/** One input argument of a request */
@ -448,7 +451,7 @@ struct fuse_conn {
/** Is removexattr not implemented by fs? */
unsigned no_removexattr:1;
/** Are file locking primitives not implemented by fs? */
/** Are posix file locking primitives not implemented by fs? */
unsigned no_lock:1;
/** Is access not implemented by fs? */
@ -472,6 +475,9 @@ struct fuse_conn {
/** Don't apply umask to creation modes */
unsigned dont_mask:1;
/** Are BSD file locking primitives not implemented by fs? */
unsigned no_flock:1;
/** The number of requests waiting for completion */
atomic_t num_waiting;

View file

@ -71,7 +71,7 @@ struct fuse_mount_data {
unsigned blksize;
};
struct fuse_forget_link *fuse_alloc_forget()
struct fuse_forget_link *fuse_alloc_forget(void)
{
return kzalloc(sizeof(struct fuse_forget_link), GFP_KERNEL);
}
@ -809,6 +809,10 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
fc->async_read = 1;
if (!(arg->flags & FUSE_POSIX_LOCKS))
fc->no_lock = 1;
if (arg->minor >= 17) {
if (!(arg->flags & FUSE_FLOCK_LOCKS))
fc->no_flock = 1;
}
if (arg->flags & FUSE_ATOMIC_O_TRUNC)
fc->atomic_o_trunc = 1;
if (arg->minor >= 9) {
@ -823,6 +827,7 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
} else {
ra_pages = fc->max_read / PAGE_CACHE_SIZE;
fc->no_lock = 1;
fc->no_flock = 1;
}
fc->bdi.ra_pages = min(fc->bdi.ra_pages, ra_pages);
@ -843,7 +848,8 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
arg->minor = FUSE_KERNEL_MINOR_VERSION;
arg->max_readahead = fc->bdi.ra_pages * PAGE_CACHE_SIZE;
arg->flags |= FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC |
FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK;
FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK |
FUSE_FLOCK_LOCKS;
req->in.h.opcode = FUSE_INIT;
req->in.numargs = 1;
req->in.args[0].size = sizeof(*arg);

View file

@ -47,6 +47,9 @@
* - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
* fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
* - add FUSE_IOCTL_32BIT flag
*
* 7.17
* - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
*/
#ifndef _LINUX_FUSE_H
@ -78,7 +81,7 @@
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
#define FUSE_KERNEL_MINOR_VERSION 16
#define FUSE_KERNEL_MINOR_VERSION 17
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
@ -153,8 +156,10 @@ struct fuse_file_lock {
/**
* INIT request/reply flags
*
* FUSE_POSIX_LOCKS: remote locking for POSIX file locks
* FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
* FUSE_DONT_MASK: don't apply umask to file mode on create operations
* FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
@ -163,6 +168,7 @@ struct fuse_file_lock {
#define FUSE_EXPORT_SUPPORT (1 << 4)
#define FUSE_BIG_WRITES (1 << 5)
#define FUSE_DONT_MASK (1 << 6)
#define FUSE_FLOCK_LOCKS (1 << 10)
/**
* CUSE INIT request/reply flags
@ -175,6 +181,7 @@ struct fuse_file_lock {
* Release flags
*/
#define FUSE_RELEASE_FLUSH (1 << 0)
#define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1)
/**
* Getattr flags