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authorAl Viro <viro@zeniv.linux.org.uk>2012-06-26 21:58:53 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-07-23 00:01:29 +0400
commit765927b2d508712d320c8934db963bbe14c3fcec (patch)
tree97acdb14fae285764def396c4ed01d4d5c93e76a /fs
parentbf349a447059656ebe63fb4fd1ccb27ac1da22ad (diff)
downloadlinux-765927b2d508712d320c8934db963bbe14c3fcec.tar.gz
switch dentry_open() to struct path, make it grab references itself
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r--fs/autofs4/dev-ioctl.c4
-rw-r--r--fs/cachefiles/rdwr.c8
-rw-r--r--fs/ecryptfs/kthread.c21
-rw-r--r--fs/exportfs/expfs.c13
-rw-r--r--fs/hppfs/hppfs.c20
-rw-r--r--fs/nfsd/vfs.c10
-rw-r--r--fs/notify/fanotify/fanotify_user.c8
-rw-r--r--fs/open.c17
-rw-r--r--fs/xfs/xfs_ioctl.c7
9 files changed, 45 insertions, 63 deletions
diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
index aa9103f8f01..abf645c1703 100644
--- a/fs/autofs4/dev-ioctl.c
+++ b/fs/autofs4/dev-ioctl.c
@@ -257,8 +257,8 @@ static int autofs_dev_ioctl_open_mountpoint(const char *name, dev_t devid)
* corresponding to the autofs fs we want to open.
*/
- filp = dentry_open(path.dentry, path.mnt, O_RDONLY,
- current_cred());
+ filp = dentry_open(&path, O_RDONLY, current_cred());
+ path_put(&path);
if (IS_ERR(filp)) {
err = PTR_ERR(filp);
goto out;
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 0e3c0924cc3..c0353dfac51 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -891,6 +891,7 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
struct cachefiles_cache *cache;
mm_segment_t old_fs;
struct file *file;
+ struct path path;
loff_t pos, eof;
size_t len;
void *data;
@@ -916,10 +917,9 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
/* write the page to the backing filesystem and let it store it in its
* own time */
- dget(object->backer);
- mntget(cache->mnt);
- file = dentry_open(object->backer, cache->mnt, O_RDWR,
- cache->cache_cred);
+ path.mnt = cache->mnt;
+ path.dentry = object->backer;
+ file = dentry_open(&path, O_RDWR, cache->cache_cred);
if (IS_ERR(file)) {
ret = PTR_ERR(file);
} else {
diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c
index c7d199dc7d2..809e67d05ca 100644
--- a/fs/ecryptfs/kthread.c
+++ b/fs/ecryptfs/kthread.c
@@ -29,8 +29,7 @@
struct ecryptfs_open_req {
struct file **lower_file;
- struct dentry *lower_dentry;
- struct vfsmount *lower_mnt;
+ struct path path;
struct completion done;
struct list_head kthread_ctl_list;
};
@@ -74,10 +73,7 @@ static int ecryptfs_threadfn(void *ignored)
struct ecryptfs_open_req,
kthread_ctl_list);
list_del(&req->kthread_ctl_list);
- dget(req->lower_dentry);
- mntget(req->lower_mnt);
- (*req->lower_file) = dentry_open(
- req->lower_dentry, req->lower_mnt,
+ *req->lower_file = dentry_open(&req->path,
(O_RDWR | O_LARGEFILE), current_cred());
complete(&req->done);
}
@@ -140,23 +136,22 @@ int ecryptfs_privileged_open(struct file **lower_file,
int flags = O_LARGEFILE;
int rc = 0;
+ init_completion(&req.done);
+ req.lower_file = lower_file;
+ req.path.dentry = lower_dentry;
+ req.path.mnt = lower_mnt;
+
/* Corresponding dput() and mntput() are done when the
* lower file is fput() when all eCryptfs files for the inode are
* released. */
- dget(lower_dentry);
- mntget(lower_mnt);
flags |= IS_RDONLY(lower_dentry->d_inode) ? O_RDONLY : O_RDWR;
- (*lower_file) = dentry_open(lower_dentry, lower_mnt, flags, cred);
+ (*lower_file) = dentry_open(&req.path, flags, cred);
if (!IS_ERR(*lower_file))
goto out;
if ((flags & O_ACCMODE) == O_RDONLY) {
rc = PTR_ERR((*lower_file));
goto out;
}
- init_completion(&req.done);
- req.lower_file = lower_file;
- req.lower_dentry = lower_dentry;
- req.lower_mnt = lower_mnt;
mutex_lock(&ecryptfs_kthread_ctl.mux);
if (ecryptfs_kthread_ctl.flags & ECRYPTFS_KTHREAD_ZOMBIE) {
rc = -EIO;
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index b42063cf1b2..29ab099e3e0 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -19,19 +19,19 @@
#define dprintk(fmt, args...) do{}while(0)
-static int get_name(struct vfsmount *mnt, struct dentry *dentry, char *name,
- struct dentry *child);
+static int get_name(const struct path *path, char *name, struct dentry *child);
static int exportfs_get_name(struct vfsmount *mnt, struct dentry *dir,
char *name, struct dentry *child)
{
const struct export_operations *nop = dir->d_sb->s_export_op;
+ struct path path = {.mnt = mnt, .dentry = dir};
if (nop->get_name)
return nop->get_name(dir, name, child);
else
- return get_name(mnt, dir, name, child);
+ return get_name(&path, name, child);
}
/*
@@ -249,11 +249,10 @@ static int filldir_one(void * __buf, const char * name, int len,
* calls readdir on the parent until it finds an entry with
* the same inode number as the child, and returns that.
*/
-static int get_name(struct vfsmount *mnt, struct dentry *dentry,
- char *name, struct dentry *child)
+static int get_name(const struct path *path, char *name, struct dentry *child)
{
const struct cred *cred = current_cred();
- struct inode *dir = dentry->d_inode;
+ struct inode *dir = path->dentry->d_inode;
int error;
struct file *file;
struct getdents_callback buffer;
@@ -267,7 +266,7 @@ static int get_name(struct vfsmount *mnt, struct dentry *dentry,
/*
* Open the directory ...
*/
- file = dentry_open(dget(dentry), mntget(mnt), O_RDONLY, cred);
+ file = dentry_open(path, O_RDONLY, cred);
error = PTR_ERR(file);
if (IS_ERR(file))
goto out;
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index e5c06531dcc..c1dffe47fde 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -420,8 +420,7 @@ static int hppfs_open(struct inode *inode, struct file *file)
{
const struct cred *cred = file->f_cred;
struct hppfs_private *data;
- struct vfsmount *proc_mnt;
- struct dentry *proc_dentry;
+ struct path path;
char *host_file;
int err, fd, type, filter;
@@ -434,12 +433,11 @@ static int hppfs_open(struct inode *inode, struct file *file)
if (host_file == NULL)
goto out_free2;
- proc_dentry = HPPFS_I(inode)->proc_dentry;
- proc_mnt = inode->i_sb->s_fs_info;
+ path.mnt = inode->i_sb->s_fs_info;
+ path.dentry = HPPFS_I(inode)->proc_dentry;
/* XXX This isn't closed anywhere */
- data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
- file_mode(file->f_mode), cred);
+ data->proc_file = dentry_open(&path, file_mode(file->f_mode), cred);
err = PTR_ERR(data->proc_file);
if (IS_ERR(data->proc_file))
goto out_free1;
@@ -484,8 +482,7 @@ static int hppfs_dir_open(struct inode *inode, struct file *file)
{
const struct cred *cred = file->f_cred;
struct hppfs_private *data;
- struct vfsmount *proc_mnt;
- struct dentry *proc_dentry;
+ struct path path;
int err;
err = -ENOMEM;
@@ -493,10 +490,9 @@ static int hppfs_dir_open(struct inode *inode, struct file *file)
if (data == NULL)
goto out;
- proc_dentry = HPPFS_I(inode)->proc_dentry;
- proc_mnt = inode->i_sb->s_fs_info;
- data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
- file_mode(file->f_mode), cred);
+ path.mnt = inode->i_sb->s_fs_info;
+ path.dentry = HPPFS_I(inode)->proc_dentry;
+ data->proc_file = dentry_open(&path, file_mode(file->f_mode), cred);
err = PTR_ERR(data->proc_file);
if (IS_ERR(data->proc_file))
goto out_free;
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 05d9eee6be3..4700a0a929d 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -745,7 +745,7 @@ __be32
nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
int may_flags, struct file **filp)
{
- struct dentry *dentry;
+ struct path path;
struct inode *inode;
int flags = O_RDONLY|O_LARGEFILE;
__be32 err;
@@ -762,8 +762,9 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
if (err)
goto out;
- dentry = fhp->fh_dentry;
- inode = dentry->d_inode;
+ path.mnt = fhp->fh_export->ex_path.mnt;
+ path.dentry = fhp->fh_dentry;
+ inode = path.dentry->d_inode;
/* Disallow write access to files with the append-only bit set
* or any access when mandatory locking enabled
@@ -792,8 +793,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
else
flags = O_WRONLY|O_LARGEFILE;
}
- *filp = dentry_open(dget(dentry), mntget(fhp->fh_export->ex_path.mnt),
- flags, current_cred());
+ *filp = dentry_open(&path, flags, current_cred());
if (IS_ERR(*filp))
host_err = PTR_ERR(*filp);
else {
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 3568c8a8b13..d4380366973 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -61,8 +61,6 @@ static struct fsnotify_event *get_one_event(struct fsnotify_group *group,
static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
{
int client_fd;
- struct dentry *dentry;
- struct vfsmount *mnt;
struct file *new_file;
pr_debug("%s: group=%p event=%p\n", __func__, group, event);
@@ -81,12 +79,10 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
* we need a new file handle for the userspace program so it can read even if it was
* originally opened O_WRONLY.
*/
- dentry = dget(event->path.dentry);
- mnt = mntget(event->path.mnt);
/* it's possible this event was an overflow event. in that case dentry and mnt
* are NULL; That's fine, just don't call dentry open */
- if (dentry && mnt)
- new_file = dentry_open(dentry, mnt,
+ if (event->path.dentry && event->path.mnt)
+ new_file = dentry_open(&event->path,
group->fanotify_data.f_flags | FMODE_NONOTIFY,
current_cred());
else
diff --git a/fs/open.c b/fs/open.c
index 75bea868ef8..1e914b397e1 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -766,11 +766,7 @@ int finish_no_open(struct file *file, struct dentry *dentry)
}
EXPORT_SYMBOL(finish_no_open);
-/*
- * dentry_open() will have done dput(dentry) and mntput(mnt) if it returns an
- * error.
- */
-struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags,
+struct file *dentry_open(const struct path *path, int flags,
const struct cred *cred)
{
int error;
@@ -779,19 +775,16 @@ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags,
validate_creds(cred);
/* We must always pass in a valid mount pointer. */
- BUG_ON(!mnt);
+ BUG_ON(!path->mnt);
error = -ENFILE;
f = get_empty_filp();
- if (f == NULL) {
- dput(dentry);
- mntput(mnt);
+ if (f == NULL)
return ERR_PTR(error);
- }
f->f_flags = flags;
- f->f_path.mnt = mnt;
- f->f_path.dentry = dentry;
+ f->f_path = *path;
+ path_get(&f->f_path);
error = do_dentry_open(f, NULL, cred);
if (!error) {
error = open_check_o_direct(f);
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 3a05a41b5d7..1f1535d25a9 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -208,6 +208,7 @@ xfs_open_by_handle(
struct inode *inode;
struct dentry *dentry;
fmode_t fmode;
+ struct path path;
if (!capable(CAP_SYS_ADMIN))
return -XFS_ERROR(EPERM);
@@ -252,8 +253,10 @@ xfs_open_by_handle(
goto out_dput;
}
- filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
- hreq->oflags, cred);
+ path.mnt = parfilp->f_path.mnt;
+ path.dentry = dentry;
+ filp = dentry_open(&path, hreq->oflags, cred);
+ dput(dentry);
if (IS_ERR(filp)) {
put_unused_fd(fd);
return PTR_ERR(filp);