This pulls the code for opening a file, after its handle has been
converted to a struct path, into a new helper function.
This function will be used by io_uring once io_uring supports
open_by_handle_at(2).
Signed-off-by: Thomas Bertschinger <tahbertschinger@xxxxxxxxx>
---
fs/fhandle.c | 21 +++++++++++++++------
fs/internal.h | 1 +
2 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/fs/fhandle.c b/fs/fhandle.c
index 36e194dd4cb6..91b0d340a4d1 100644
--- a/fs/fhandle.c
+++ b/fs/fhandle.c
@@ -402,6 +402,20 @@ int handle_to_path(int mountdirfd, struct file_handle *handle,
return retval;
}
+struct file *do_filp_path_open(struct path *path, int open_flag)
+{
+ const struct export_operations *eops;
+ struct file *file;
+
+ eops = path->mnt->mnt_sb->s_export_op;
+ if (eops->open)
+ file = eops->open(path, open_flag);
+ else
+ file = file_open_root(path, "", open_flag, 0);
+
+ return file;
+}
+
static long do_handle_open(int mountdirfd, struct file_handle __user *ufh,
int open_flag)
{
@@ -409,7 +423,6 @@ static long do_handle_open(int mountdirfd, struct file_handle __user *ufh,
long retval = 0;
struct path path __free(path_put) = {};
struct file *file;
- const struct export_operations *eops;
handle = get_user_handle(ufh);
if (IS_ERR(handle))
@@ -423,11 +436,7 @@ static long do_handle_open(int mountdirfd, struct file_handle __user *ufh,
if (fd < 0)
return fd;
- eops = path.mnt->mnt_sb->s_export_op;
- if (eops->open)
- file = eops->open(&path, open_flag);
- else
- file = file_open_root(&path, "", open_flag, 0);
+ file = do_filp_path_open(&path, open_flag);
if (IS_ERR(file))
return PTR_ERR(file);
diff --git a/fs/internal.h b/fs/internal.h
index ab80f83ded47..599e0d7b450e 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -366,4 +366,5 @@ long do_sys_name_to_handle_at(int dfd, const char __user *name,
struct file_handle *get_user_handle(struct file_handle __user *ufh);
int handle_to_path(int mountdirfd, struct file_handle *handle,
struct path *path, unsigned int o_flags);
+struct file *do_filp_path_open(struct path *path, int open_flag);
#endif /* CONFIG_FHANDLE */
--
2.51.0
