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9p: v9fs_fid_find: also lookup by inode if not found dentry

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[ Upstream commit 38d222b3163f7b7d737e5d999ffc890a12870e36 ]

It's possible for v9fs_fid_find "find by dentry" branch to not turn up
anything despite having an entry set (because e.g. uid doesn't match),
in which case the calling code will generally make an extra lookup
to the server.

In this case we might have had better luck looking by inode, so fall
back to look up by inode if we have one and the lookup by dentry failed.

Message-Id: <20240523210024.1214386-1-asmadeus@codewreck.org>
Reviewed-by: Christian Schoenebeck <linux_oss@crudebyte.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dominique Martinet
2024-05-23 20:31:38 +09:00
committed by Greg Kroah-Hartman
parent f1ab3a1bcb
commit a63c78c349
1 changed files with 2 additions and 3 deletions
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5
fs/9p/fid.c
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@@ -131,10 +131,9 @@ static struct p9_fid *v9fs_fid_find(struct dentry *dentry, kuid_t uid, int any)
}
}
spin_unlock(&dentry->d_lock);
} else {
if (dentry->d_inode)
ret = v9fs_fid_find_inode(dentry->d_inode, false, uid, any);
}
if (!ret && dentry->d_inode)
ret = v9fs_fid_find_inode(dentry->d_inode, false, uid, any);
return ret;
}