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Merge branch 'cuse' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

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* 'cuse' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  CUSE: implement CUSE - Character device in Userspace
  fuse: export symbols to be used by CUSE
  fuse: update fuse_conn_init() and separate out fuse_conn_kill()
  fuse: don't use inode in fuse_file_poll
  fuse: don't use inode in fuse_do_ioctl() helper
  fuse: don't use inode in fuse_sync_release()
  fuse: create fuse_do_open() helper for CUSE
  fuse: clean up args in fuse_finish_open() and fuse_release_fill()
  fuse: don't use inode in helpers called by fuse_direct_io()
  fuse: add members to struct fuse_file
  fuse: prepare fuse_direct_io() for CUSE
  fuse: clean up fuse_write_fill()
  fuse: use struct path in release structure
  fuse: misc cleanups
This commit is contained in:
Linus Torvalds
2009-06-12 09:31:20 -07:00
parent 65d52cc9d4 151060ac13
commit c34752bc8b
9 changed files with 985 additions and 236 deletions
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118
fs/fuse/inode.c
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@@ -277,11 +277,14 @@ static void fuse_send_destroy(struct fuse_conn *fc)
}
}
static void fuse_put_super(struct super_block *sb)
static void fuse_bdi_destroy(struct fuse_conn *fc)
{
struct fuse_conn *fc = get_fuse_conn_super(sb);
if (fc->bdi_initialized)
bdi_destroy(&fc->bdi);
}
fuse_send_destroy(fc);
void fuse_conn_kill(struct fuse_conn *fc)
{
spin_lock(&fc->lock);
fc->connected = 0;
fc->blocked = 0;
@@ -295,7 +298,16 @@ static void fuse_put_super(struct super_block *sb)
list_del(&fc->entry);
fuse_ctl_remove_conn(fc);
mutex_unlock(&fuse_mutex);
bdi_destroy(&fc->bdi);
fuse_bdi_destroy(fc);
}
EXPORT_SYMBOL_GPL(fuse_conn_kill);
static void fuse_put_super(struct super_block *sb)
{
struct fuse_conn *fc = get_fuse_conn_super(sb);
fuse_send_destroy(fc);
fuse_conn_kill(fc);
fuse_conn_put(fc);
}
@@ -466,10 +478,8 @@ static int fuse_show_options(struct seq_file *m, struct vfsmount *mnt)
return 0;
}
int fuse_conn_init(struct fuse_conn *fc, struct super_block *sb)
void fuse_conn_init(struct fuse_conn *fc)
{
int err;
memset(fc, 0, sizeof(*fc));
spin_lock_init(&fc->lock);
mutex_init(&fc->inst_mutex);
@@ -484,49 +494,12 @@ int fuse_conn_init(struct fuse_conn *fc, struct super_block *sb)
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_mutex_destroy;
if (sb->s_bdev) {
err = bdi_register(&fc->bdi, NULL, "%u:%u-fuseblk",
MAJOR(fc->dev), MINOR(fc->dev));
} else {
err = bdi_register_dev(&fc->bdi, fc->dev);
}
if (err)
goto error_bdi_destroy;
/*
* For a single fuse filesystem use max 1% of dirty +
* writeback threshold.
*
* This gives about 1M of write buffer for memory maps on a
* machine with 1G and 10% dirty_ratio, which should be more
* than enough.
*
* Privileged users can raise it by writing to
*
* /sys/class/bdi/<bdi>/max_ratio
*/
bdi_set_max_ratio(&fc->bdi, 1);
fc->reqctr = 0;
fc->blocked = 1;
fc->attr_version = 1;
get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
return 0;
error_bdi_destroy:
bdi_destroy(&fc->bdi);
error_mutex_destroy:
mutex_destroy(&fc->inst_mutex);
return err;
}
EXPORT_SYMBOL_GPL(fuse_conn_init);
@@ -539,12 +512,14 @@ void fuse_conn_put(struct fuse_conn *fc)
fc->release(fc);
}
}
EXPORT_SYMBOL_GPL(fuse_conn_put);
struct fuse_conn *fuse_conn_get(struct fuse_conn *fc)
{
atomic_inc(&fc->count);
return fc;
}
EXPORT_SYMBOL_GPL(fuse_conn_get);
static struct inode *fuse_get_root_inode(struct super_block *sb, unsigned mode)
{
@@ -797,6 +772,48 @@ static void fuse_free_conn(struct fuse_conn *fc)
kfree(fc);
}
static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)
{
int err;
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;
err = bdi_init(&fc->bdi);
if (err)
return err;
fc->bdi_initialized = 1;
if (sb->s_bdev) {
err = bdi_register(&fc->bdi, NULL, "%u:%u-fuseblk",
MAJOR(fc->dev), MINOR(fc->dev));
} else {
err = bdi_register_dev(&fc->bdi, fc->dev);
}
if (err)
return err;
/*
* For a single fuse filesystem use max 1% of dirty +
* writeback threshold.
*
* This gives about 1M of write buffer for memory maps on a
* machine with 1G and 10% dirty_ratio, which should be more
* than enough.
*
* Privileged users can raise it by writing to
*
* /sys/class/bdi/<bdi>/max_ratio
*/
bdi_set_max_ratio(&fc->bdi, 1);
return 0;
}
static int fuse_fill_super(struct super_block *sb, void *data, int silent)
{
struct fuse_conn *fc;
@@ -843,11 +860,12 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
if (!fc)
goto err_fput;
err = fuse_conn_init(fc, sb);
if (err) {
kfree(fc);
goto err_fput;
}
fuse_conn_init(fc);
fc->dev = sb->s_dev;
err = fuse_bdi_init(fc, sb);
if (err)
goto err_put_conn;
fc->release = fuse_free_conn;
fc->flags = d.flags;
@@ -911,7 +929,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
err_put_root:
dput(root_dentry);
err_put_conn:
bdi_destroy(&fc->bdi);
fuse_bdi_destroy(fc);
fuse_conn_put(fc);
err_fput:
fput(file);