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ANDROID: fsnotify: Do not notify lower fs of open when ENOSYS

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Even though FUSE supports d_canonical_path, the underlying server may
not implement the operation. In that case, follow the same logic for
filesystems that do not have the canonical path operation instead of
returning early from fsnotify_file with an error.

Bug: 326995824
Test: cts-tradefed run commandAndExit cts -m CtsOsTestCases -t android.os.cts.FileObserverTest

Change-Id: Iae618d4159222b06467b9a0bbb67fb67885aa65e
Signed-off-by: Tiffany Yang <ynaffit@google.com>
(cherry picked from commit 61d32e739d27dd35353a22804023f099b383df3b)
This commit is contained in:
Tiffany Yang
2024-07-26 13:29:58 -07:00
committed by Alistair Delva
parent 7d0a1d6b86
commit a112c9c24c
1 changed files with 9 additions and 7 deletions
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16
include/linux/fsnotify.h
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@@ -107,15 +107,17 @@ static inline int fsnotify_file(struct file *file, __u32 mask)
ret = path->dentry->d_op->d_canonical_path(path,
&lower_path);
if (ret)
return ret;
if (ret != -ENOSYS) {
if (ret)
return ret;
ret = fsnotify_parent(lower_path.dentry, mask,
&lower_path, FSNOTIFY_EVENT_PATH);
path_put(&lower_path);
ret = fsnotify_parent(lower_path.dentry, mask,
&lower_path, FSNOTIFY_EVENT_PATH);
path_put(&lower_path);
if (ret)
return ret;
if (ret)
return ret;
}
}
}