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Revert "ANDROID: vfs: add d_canonical_path for stacked filesystem support"

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This reverts commit b05bef535d as there is
no need for it as sdcardfs is now gone.

Bug: 157700134
Cc: Daniel Rosenberg <drosen@google.com>
Cc: Alistair Strachan <astrachan@google.com>
Cc: Yongqin Liu <yongqin.liu@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I36752a84e13f1ee8709ba9c04c93c202e3f05b74
This commit is contained in:
Greg Kroah-Hartman
2020-05-28 16:35:30 +02:00
parent e9aaf35681
commit 972cde43ff
3 changed files with 2 additions and 23 deletions
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15
fs/notify/inotify/inotify_user.c
View File

@@ -701,8 +701,6 @@ SYSCALL_DEFINE3(inotify_add_watch, int, fd, const char __user *, pathname,
struct fsnotify_group *group;
struct inode *inode;
struct path path;
struct path alteredpath;
struct path *canonical_path = &path;
struct fd f;
int ret;
unsigned flags = 0;
@@ -749,22 +747,13 @@ SYSCALL_DEFINE3(inotify_add_watch, int, fd, const char __user *, pathname,
if (ret)
goto fput_and_out;
/* support stacked filesystems */
if(path.dentry && path.dentry->d_op) {
if (path.dentry->d_op->d_canonical_path) {
path.dentry->d_op->d_canonical_path(&path, &alteredpath);
canonical_path = &alteredpath;
path_put(&path);
}
}
/* inode held in place by reference to path; group by fget on fd */
inode = canonical_path->dentry->d_inode;
inode = path.dentry->d_inode;
group = f.file->private_data;
/* create/update an inode mark */
ret = inotify_update_watch(group, inode, mask);
path_put(canonical_path);
path_put(&path);
fput_and_out:
fdput(f);
return ret;

1
include/linux/dcache.h
View File

@@ -147,7 +147,6 @@ struct dentry_operations {
struct vfsmount *(*d_automount)(struct path *);
int (*d_manage)(const struct path *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *);
void (*d_canonical_path)(const struct path *, struct path *);
} ____cacheline_aligned;
/*

9
include/linux/fsnotify.h
View File

@@ -262,20 +262,11 @@ static inline void fsnotify_modify(struct file *file)
*/
static inline void fsnotify_open(struct file *file)
{
const struct path *path = &file->f_path;
struct path lower_path;
__u32 mask = FS_OPEN;
if (file->f_flags & __FMODE_EXEC)
mask |= FS_OPEN_EXEC;
if (path->dentry->d_op && path->dentry->d_op->d_canonical_path) {
path->dentry->d_op->d_canonical_path(path, &lower_path);
fsnotify_parent(lower_path.dentry, mask, &lower_path,
FSNOTIFY_EVENT_PATH);
fsnotify(lower_path.dentry->d_inode, mask, &lower_path, FSNOTIFY_EVENT_PATH, NULL, 0);
path_put(&lower_path);
}
fsnotify_file(file, mask);
}